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Comparing libev/ev.c (file contents):
Revision 1.284 by root, Wed Apr 15 17:49:26 2009 UTC vs.
Revision 1.531 by root, Wed Mar 18 12:30:49 2020 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2020 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
46# endif
47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
50# endif 52# endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
… …
57# endif 59# endif
58# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
60# endif 62# endif
61# endif 63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
62# endif 66# endif
63 67
64# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
… …
75# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
77# endif 81# endif
78# endif 82# endif
79 83
84# if HAVE_NANOSLEEP
80# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
83# else 88# else
89# undef EV_USE_NANOSLEEP
84# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
85# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
86# endif 100# endif
87 101
102# if HAVE_POLL && HAVE_POLL_H
88# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
89# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif 105# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else 106# else
107# undef EV_USE_POLL
100# define EV_USE_POLL 0 108# define EV_USE_POLL 0
101# endif
102# endif 109# endif
103 110
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
107# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# define EV_USE_EPOLL 0
109# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
110# endif 118# endif
111 119
112# ifndef EV_USE_KQUEUE 120# if HAVE_LINUX_AIO_ABI_H
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 121# ifndef EV_USE_LINUXAIO
114# define EV_USE_KQUEUE 1 122# define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */
115# else
116# define EV_USE_KQUEUE 0
117# endif 123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
118# endif 127# endif
119 128
129# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
120# ifndef EV_USE_PORT 130# ifndef EV_USE_IOURING
121# if HAVE_PORT_H && HAVE_PORT_CREATE 131# define EV_USE_IOURING EV_FEATURE_BACKENDS
122# define EV_USE_PORT 1
123# else
124# define EV_USE_PORT 0
125# endif 132# endif
126# endif
127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else 133# else
134# undef EV_USE_IOURING
132# define EV_USE_INOTIFY 0 135# define EV_USE_IOURING 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif 136# endif
143 137
138# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
139# ifndef EV_USE_KQUEUE
140# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
141# endif
142# else
143# undef EV_USE_KQUEUE
144# define EV_USE_KQUEUE 0
144#endif 145# endif
146
147# if HAVE_PORT_H && HAVE_PORT_CREATE
148# ifndef EV_USE_PORT
149# define EV_USE_PORT EV_FEATURE_BACKENDS
150# endif
151# else
152# undef EV_USE_PORT
153# define EV_USE_PORT 0
154# endif
145 155
146#include <math.h> 156# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
157# ifndef EV_USE_INOTIFY
158# define EV_USE_INOTIFY EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_INOTIFY
162# define EV_USE_INOTIFY 0
163# endif
164
165# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
166# ifndef EV_USE_SIGNALFD
167# define EV_USE_SIGNALFD EV_FEATURE_OS
168# endif
169# else
170# undef EV_USE_SIGNALFD
171# define EV_USE_SIGNALFD 0
172# endif
173
174# if HAVE_EVENTFD
175# ifndef EV_USE_EVENTFD
176# define EV_USE_EVENTFD EV_FEATURE_OS
177# endif
178# else
179# undef EV_USE_EVENTFD
180# define EV_USE_EVENTFD 0
181# endif
182
183# if HAVE_SYS_TIMERFD_H
184# ifndef EV_USE_TIMERFD
185# define EV_USE_TIMERFD EV_FEATURE_OS
186# endif
187# else
188# undef EV_USE_TIMERFD
189# define EV_USE_TIMERFD 0
190# endif
191
192#endif
193
194/* OS X, in its infinite idiocy, actually HARDCODES
195 * a limit of 1024 into their select. Where people have brains,
196 * OS X engineers apparently have a vacuum. Or maybe they were
197 * ordered to have a vacuum, or they do anything for money.
198 * This might help. Or not.
199 * Note that this must be defined early, as other include files
200 * will rely on this define as well.
201 */
202#define _DARWIN_UNLIMITED_SELECT 1
203
147#include <stdlib.h> 204#include <stdlib.h>
205#include <string.h>
148#include <fcntl.h> 206#include <fcntl.h>
149#include <stddef.h> 207#include <stddef.h>
150 208
151#include <stdio.h> 209#include <stdio.h>
152 210
153#include <assert.h> 211#include <assert.h>
154#include <errno.h> 212#include <errno.h>
155#include <sys/types.h> 213#include <sys/types.h>
156#include <time.h> 214#include <time.h>
215#include <limits.h>
157 216
158#include <signal.h> 217#include <signal.h>
159 218
160#ifdef EV_H 219#ifdef EV_H
161# include EV_H 220# include EV_H
162#else 221#else
163# include "ev.h" 222# include "ev.h"
223#endif
224
225#if EV_NO_THREADS
226# undef EV_NO_SMP
227# define EV_NO_SMP 1
228# undef ECB_NO_THREADS
229# define ECB_NO_THREADS 1
230#endif
231#if EV_NO_SMP
232# undef EV_NO_SMP
233# define ECB_NO_SMP 1
164#endif 234#endif
165 235
166#ifndef _WIN32 236#ifndef _WIN32
167# include <sys/time.h> 237# include <sys/time.h>
168# include <sys/wait.h> 238# include <sys/wait.h>
169# include <unistd.h> 239# include <unistd.h>
170#else 240#else
171# include <io.h> 241# include <io.h>
172# define WIN32_LEAN_AND_MEAN 242# define WIN32_LEAN_AND_MEAN
243# include <winsock2.h>
173# include <windows.h> 244# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET 245# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1 246# define EV_SELECT_IS_WINSOCKET 1
176# endif 247# endif
248# undef EV_AVOID_STDIO
177#endif 249#endif
178 250
179/* this block tries to deduce configuration from header-defined symbols and defaults */ 251/* this block tries to deduce configuration from header-defined symbols and defaults */
180 252
253/* try to deduce the maximum number of signals on this platform */
254#if defined EV_NSIG
255/* use what's provided */
256#elif defined NSIG
257# define EV_NSIG (NSIG)
258#elif defined _NSIG
259# define EV_NSIG (_NSIG)
260#elif defined SIGMAX
261# define EV_NSIG (SIGMAX+1)
262#elif defined SIG_MAX
263# define EV_NSIG (SIG_MAX+1)
264#elif defined _SIG_MAX
265# define EV_NSIG (_SIG_MAX+1)
266#elif defined MAXSIG
267# define EV_NSIG (MAXSIG+1)
268#elif defined MAX_SIG
269# define EV_NSIG (MAX_SIG+1)
270#elif defined SIGARRAYSIZE
271# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
272#elif defined _sys_nsig
273# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
274#else
275# define EV_NSIG (8 * sizeof (sigset_t) + 1)
276#endif
277
278#ifndef EV_USE_FLOOR
279# define EV_USE_FLOOR 0
280#endif
281
181#ifndef EV_USE_CLOCK_SYSCALL 282#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2 283# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
183# define EV_USE_CLOCK_SYSCALL 1 284# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
184# else 285# else
185# define EV_USE_CLOCK_SYSCALL 0 286# define EV_USE_CLOCK_SYSCALL 0
186# endif 287# endif
187#endif 288#endif
188 289
290#if !(_POSIX_TIMERS > 0)
291# ifndef EV_USE_MONOTONIC
292# define EV_USE_MONOTONIC 0
293# endif
294# ifndef EV_USE_REALTIME
295# define EV_USE_REALTIME 0
296# endif
297#endif
298
189#ifndef EV_USE_MONOTONIC 299#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 300# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1 301# define EV_USE_MONOTONIC EV_FEATURE_OS
192# else 302# else
193# define EV_USE_MONOTONIC 0 303# define EV_USE_MONOTONIC 0
194# endif 304# endif
195#endif 305#endif
196 306
… …
198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 308# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif 309#endif
200 310
201#ifndef EV_USE_NANOSLEEP 311#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L 312# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1 313# define EV_USE_NANOSLEEP EV_FEATURE_OS
204# else 314# else
205# define EV_USE_NANOSLEEP 0 315# define EV_USE_NANOSLEEP 0
206# endif 316# endif
207#endif 317#endif
208 318
209#ifndef EV_USE_SELECT 319#ifndef EV_USE_SELECT
210# define EV_USE_SELECT 1 320# define EV_USE_SELECT EV_FEATURE_BACKENDS
211#endif 321#endif
212 322
213#ifndef EV_USE_POLL 323#ifndef EV_USE_POLL
214# ifdef _WIN32 324# ifdef _WIN32
215# define EV_USE_POLL 0 325# define EV_USE_POLL 0
216# else 326# else
217# define EV_USE_POLL 1 327# define EV_USE_POLL EV_FEATURE_BACKENDS
218# endif 328# endif
219#endif 329#endif
220 330
221#ifndef EV_USE_EPOLL 331#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 332# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1 333# define EV_USE_EPOLL EV_FEATURE_BACKENDS
224# else 334# else
225# define EV_USE_EPOLL 0 335# define EV_USE_EPOLL 0
226# endif 336# endif
227#endif 337#endif
228 338
… …
232 342
233#ifndef EV_USE_PORT 343#ifndef EV_USE_PORT
234# define EV_USE_PORT 0 344# define EV_USE_PORT 0
235#endif 345#endif
236 346
347#ifndef EV_USE_LINUXAIO
348# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
349# define EV_USE_LINUXAIO 0 /* was: 1, always off by default */
350# else
351# define EV_USE_LINUXAIO 0
352# endif
353#endif
354
355#ifndef EV_USE_IOURING
356# if __linux /* later checks might disable again */
357# define EV_USE_IOURING 1
358# else
359# define EV_USE_IOURING 0
360# endif
361#endif
362
237#ifndef EV_USE_INOTIFY 363#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 364# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1 365# define EV_USE_INOTIFY EV_FEATURE_OS
240# else 366# else
241# define EV_USE_INOTIFY 0 367# define EV_USE_INOTIFY 0
242# endif 368# endif
243#endif 369#endif
244 370
245#ifndef EV_PID_HASHSIZE 371#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL 372# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif 373#endif
252 374
253#ifndef EV_INOTIFY_HASHSIZE 375#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL 376# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif 377#endif
260 378
261#ifndef EV_USE_EVENTFD 379#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 380# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1 381# define EV_USE_EVENTFD EV_FEATURE_OS
264# else 382# else
265# define EV_USE_EVENTFD 0 383# define EV_USE_EVENTFD 0
384# endif
385#endif
386
387#ifndef EV_USE_SIGNALFD
388# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
389# define EV_USE_SIGNALFD EV_FEATURE_OS
390# else
391# define EV_USE_SIGNALFD 0
392# endif
393#endif
394
395#ifndef EV_USE_TIMERFD
396# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8))
397# define EV_USE_TIMERFD EV_FEATURE_OS
398# else
399# define EV_USE_TIMERFD 0
266# endif 400# endif
267#endif 401#endif
268 402
269#if 0 /* debugging */ 403#if 0 /* debugging */
270# define EV_VERIFY 3 404# define EV_VERIFY 3
271# define EV_USE_4HEAP 1 405# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1 406# define EV_HEAP_CACHE_AT 1
273#endif 407#endif
274 408
275#ifndef EV_VERIFY 409#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL 410# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
277#endif 411#endif
278 412
279#ifndef EV_USE_4HEAP 413#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL 414# define EV_USE_4HEAP EV_FEATURE_DATA
281#endif 415#endif
282 416
283#ifndef EV_HEAP_CACHE_AT 417#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL 418# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
419#endif
420
421#ifdef __ANDROID__
422/* supposedly, android doesn't typedef fd_mask */
423# undef EV_USE_SELECT
424# define EV_USE_SELECT 0
425/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
426# undef EV_USE_CLOCK_SYSCALL
427# define EV_USE_CLOCK_SYSCALL 0
428#endif
429
430/* aix's poll.h seems to cause lots of trouble */
431#ifdef _AIX
432/* AIX has a completely broken poll.h header */
433# undef EV_USE_POLL
434# define EV_USE_POLL 0
435#endif
436
437/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
438/* which makes programs even slower. might work on other unices, too. */
439#if EV_USE_CLOCK_SYSCALL
440# include <sys/syscall.h>
441# ifdef SYS_clock_gettime
442# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
443# undef EV_USE_MONOTONIC
444# define EV_USE_MONOTONIC 1
445# define EV_NEED_SYSCALL 1
446# else
447# undef EV_USE_CLOCK_SYSCALL
448# define EV_USE_CLOCK_SYSCALL 0
449# endif
285#endif 450#endif
286 451
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 452/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288 453
289#ifndef CLOCK_MONOTONIC 454#ifndef CLOCK_MONOTONIC
… …
299#if !EV_STAT_ENABLE 464#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY 465# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0 466# define EV_USE_INOTIFY 0
302#endif 467#endif
303 468
469#if __linux && EV_USE_IOURING
470# include <linux/version.h>
471# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
472# undef EV_USE_IOURING
473# define EV_USE_IOURING 0
474# endif
475#endif
476
304#if !EV_USE_NANOSLEEP 477#if !EV_USE_NANOSLEEP
305# ifndef _WIN32 478/* hp-ux has it in sys/time.h, which we unconditionally include above */
479# if !defined _WIN32 && !defined __hpux
306# include <sys/select.h> 480# include <sys/select.h>
307# endif 481# endif
308#endif 482#endif
309 483
484#if EV_USE_LINUXAIO
485# include <sys/syscall.h>
486# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
487# define EV_NEED_SYSCALL 1
488# else
489# undef EV_USE_LINUXAIO
490# define EV_USE_LINUXAIO 0
491# endif
492#endif
493
494#if EV_USE_IOURING
495# include <sys/syscall.h>
496# if !SYS_io_uring_setup && __linux && !__alpha
497# define SYS_io_uring_setup 425
498# define SYS_io_uring_enter 426
499# define SYS_io_uring_wregister 427
500# endif
501# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
502# define EV_NEED_SYSCALL 1
503# else
504# undef EV_USE_IOURING
505# define EV_USE_IOURING 0
506# endif
507#endif
508
310#if EV_USE_INOTIFY 509#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h> 510# include <sys/statfs.h>
313# include <sys/inotify.h> 511# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 512/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW 513# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY 514# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0 515# define EV_USE_INOTIFY 0
318# endif 516# endif
319#endif 517#endif
320 518
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD 519#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 520/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
336# include <stdint.h> 521# include <stdint.h>
337# ifdef __cplusplus 522# ifndef EFD_NONBLOCK
338extern "C" { 523# define EFD_NONBLOCK O_NONBLOCK
339# endif 524# endif
340int eventfd (unsigned int initval, int flags); 525# ifndef EFD_CLOEXEC
341# ifdef __cplusplus 526# ifdef O_CLOEXEC
342} 527# define EFD_CLOEXEC O_CLOEXEC
528# else
529# define EFD_CLOEXEC 02000000
530# endif
343# endif 531# endif
532EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
533#endif
534
535#if EV_USE_SIGNALFD
536/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
537# include <stdint.h>
538# ifndef SFD_NONBLOCK
539# define SFD_NONBLOCK O_NONBLOCK
344#endif 540# endif
541# ifndef SFD_CLOEXEC
542# ifdef O_CLOEXEC
543# define SFD_CLOEXEC O_CLOEXEC
544# else
545# define SFD_CLOEXEC 02000000
546# endif
547# endif
548EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags);
345 549
346/**/ 550struct signalfd_siginfo
551{
552 uint32_t ssi_signo;
553 char pad[128 - sizeof (uint32_t)];
554};
555#endif
556
557/* for timerfd, libev core requires TFD_TIMER_CANCEL_ON_SET &c */
558#if EV_USE_TIMERFD
559# include <sys/timerfd.h>
560/* timerfd is only used for periodics */
561# if !(defined (TFD_TIMER_CANCEL_ON_SET) && defined (TFD_CLOEXEC) && defined (TFD_NONBLOCK)) || !EV_PERIODIC_ENABLE
562# undef EV_USE_TIMERFD
563# define EV_USE_TIMERFD 0
564# endif
565#endif
566
567/*****************************************************************************/
347 568
348#if EV_VERIFY >= 3 569#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 570# define EV_FREQUENT_CHECK ev_verify (EV_A)
350#else 571#else
351# define EV_FREQUENT_CHECK do { } while (0) 572# define EV_FREQUENT_CHECK do { } while (0)
352#endif 573#endif
353 574
354/* 575/*
355 * This is used to avoid floating point rounding problems. 576 * This is used to work around floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000. 577 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */ 578 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 579#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
580/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
363 581
364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 582#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 583#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */ 584#define MAX_BLOCKTIME2 1500001.07 /* same, but when timerfd is used to detect jumps, also safe delay to not overflow */
367 585
586/* find a portable timestamp that is "always" in the future but fits into time_t.
587 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
588 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
589#define EV_TSTAMP_HUGE \
590 (sizeof (time_t) >= 8 ? 10000000000000. \
591 : 0 < (time_t)4294967295 ? 4294967295. \
592 : 2147483647.) \
593
594#ifndef EV_TS_CONST
595# define EV_TS_CONST(nv) nv
596# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
597# define EV_TS_FROM_USEC(us) us * 1e-6
598# define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
599# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
600# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
601# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
602#endif
603
604/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
605/* ECB.H BEGIN */
606/*
607 * libecb - http://software.schmorp.de/pkg/libecb
608 *
609 * Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann <libecb@schmorp.de>
610 * Copyright (©) 2011 Emanuele Giaquinta
611 * All rights reserved.
612 *
613 * Redistribution and use in source and binary forms, with or without modifica-
614 * tion, are permitted provided that the following conditions are met:
615 *
616 * 1. Redistributions of source code must retain the above copyright notice,
617 * this list of conditions and the following disclaimer.
618 *
619 * 2. Redistributions in binary form must reproduce the above copyright
620 * notice, this list of conditions and the following disclaimer in the
621 * documentation and/or other materials provided with the distribution.
622 *
623 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
624 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
625 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
626 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
627 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
628 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
629 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
630 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
631 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
632 * OF THE POSSIBILITY OF SUCH DAMAGE.
633 *
634 * Alternatively, the contents of this file may be used under the terms of
635 * the GNU General Public License ("GPL") version 2 or any later version,
636 * in which case the provisions of the GPL are applicable instead of
637 * the above. If you wish to allow the use of your version of this file
638 * only under the terms of the GPL and not to allow others to use your
639 * version of this file under the BSD license, indicate your decision
640 * by deleting the provisions above and replace them with the notice
641 * and other provisions required by the GPL. If you do not delete the
642 * provisions above, a recipient may use your version of this file under
643 * either the BSD or the GPL.
644 */
645
646#ifndef ECB_H
647#define ECB_H
648
649/* 16 bits major, 16 bits minor */
650#define ECB_VERSION 0x00010008
651
652#include <string.h> /* for memcpy */
653
654#if defined (_WIN32) && !defined (__MINGW32__)
655 typedef signed char int8_t;
656 typedef unsigned char uint8_t;
657 typedef signed char int_fast8_t;
658 typedef unsigned char uint_fast8_t;
659 typedef signed short int16_t;
660 typedef unsigned short uint16_t;
661 typedef signed int int_fast16_t;
662 typedef unsigned int uint_fast16_t;
663 typedef signed int int32_t;
664 typedef unsigned int uint32_t;
665 typedef signed int int_fast32_t;
666 typedef unsigned int uint_fast32_t;
368#if __GNUC__ >= 4 667 #if __GNUC__
369# define expect(expr,value) __builtin_expect ((expr),(value)) 668 typedef signed long long int64_t;
370# define noinline __attribute__ ((noinline)) 669 typedef unsigned long long uint64_t;
670 #else /* _MSC_VER || __BORLANDC__ */
671 typedef signed __int64 int64_t;
672 typedef unsigned __int64 uint64_t;
673 #endif
674 typedef int64_t int_fast64_t;
675 typedef uint64_t uint_fast64_t;
676 #ifdef _WIN64
677 #define ECB_PTRSIZE 8
678 typedef uint64_t uintptr_t;
679 typedef int64_t intptr_t;
680 #else
681 #define ECB_PTRSIZE 4
682 typedef uint32_t uintptr_t;
683 typedef int32_t intptr_t;
684 #endif
371#else 685#else
372# define expect(expr,value) (expr) 686 #include <inttypes.h>
373# define noinline 687 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 688 #define ECB_PTRSIZE 8
375# define inline 689 #else
690 #define ECB_PTRSIZE 4
691 #endif
376# endif 692#endif
693
694#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
695#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
696
697#ifndef ECB_OPTIMIZE_SIZE
698 #if __OPTIMIZE_SIZE__
699 #define ECB_OPTIMIZE_SIZE 1
700 #else
701 #define ECB_OPTIMIZE_SIZE 0
377#endif 702 #endif
703#endif
378 704
379#define expect_false(expr) expect ((expr) != 0, 0) 705/* work around x32 idiocy by defining proper macros */
380#define expect_true(expr) expect ((expr) != 0, 1) 706#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
381#define inline_size static inline 707 #if _ILP32
708 #define ECB_AMD64_X32 1
709 #else
710 #define ECB_AMD64 1
711 #endif
712#endif
382 713
383#if EV_MINIMAL 714/* many compilers define _GNUC_ to some versions but then only implement
384# define inline_speed static noinline 715 * what their idiot authors think are the "more important" extensions,
716 * causing enormous grief in return for some better fake benchmark numbers.
717 * or so.
718 * we try to detect these and simply assume they are not gcc - if they have
719 * an issue with that they should have done it right in the first place.
720 */
721#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
722 #define ECB_GCC_VERSION(major,minor) 0
385#else 723#else
724 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
725#endif
726
727#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
728
729#if __clang__ && defined __has_builtin
730 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
731#else
732 #define ECB_CLANG_BUILTIN(x) 0
733#endif
734
735#if __clang__ && defined __has_extension
736 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
737#else
738 #define ECB_CLANG_EXTENSION(x) 0
739#endif
740
741#define ECB_CPP (__cplusplus+0)
742#define ECB_CPP11 (__cplusplus >= 201103L)
743#define ECB_CPP14 (__cplusplus >= 201402L)
744#define ECB_CPP17 (__cplusplus >= 201703L)
745
746#if ECB_CPP
747 #define ECB_C 0
748 #define ECB_STDC_VERSION 0
749#else
750 #define ECB_C 1
751 #define ECB_STDC_VERSION __STDC_VERSION__
752#endif
753
754#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
755#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
756#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
757
758#if ECB_CPP
759 #define ECB_EXTERN_C extern "C"
760 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
761 #define ECB_EXTERN_C_END }
762#else
763 #define ECB_EXTERN_C extern
764 #define ECB_EXTERN_C_BEG
765 #define ECB_EXTERN_C_END
766#endif
767
768/*****************************************************************************/
769
770/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
771/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
772
773#if ECB_NO_THREADS
774 #define ECB_NO_SMP 1
775#endif
776
777#if ECB_NO_SMP
778 #define ECB_MEMORY_FENCE do { } while (0)
779#endif
780
781/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
782#if __xlC__ && ECB_CPP
783 #include <builtins.h>
784#endif
785
786#if 1400 <= _MSC_VER
787 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
788#endif
789
790#ifndef ECB_MEMORY_FENCE
791 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
792 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
793 #if __i386 || __i386__
794 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
795 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
796 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
797 #elif ECB_GCC_AMD64
798 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
799 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
800 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
801 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
802 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
803 #elif defined __ARM_ARCH_2__ \
804 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
805 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
806 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
807 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
808 || defined __ARM_ARCH_5TEJ__
809 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
810 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
811 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
812 || defined __ARM_ARCH_6T2__
813 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
814 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
815 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
816 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
817 #elif __aarch64__
818 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
819 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
820 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
821 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
822 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
823 #elif defined __s390__ || defined __s390x__
824 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
825 #elif defined __mips__
826 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
827 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
828 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
829 #elif defined __alpha__
830 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
831 #elif defined __hppa__
832 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
833 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
834 #elif defined __ia64__
835 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
836 #elif defined __m68k__
837 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
838 #elif defined __m88k__
839 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
840 #elif defined __sh__
841 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
842 #endif
843 #endif
844#endif
845
846#ifndef ECB_MEMORY_FENCE
847 #if ECB_GCC_VERSION(4,7)
848 /* see comment below (stdatomic.h) about the C11 memory model. */
849 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
850 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
851 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
852 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
853
854 #elif ECB_CLANG_EXTENSION(c_atomic)
855 /* see comment below (stdatomic.h) about the C11 memory model. */
856 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
857 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
858 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
859 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
860
861 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
862 #define ECB_MEMORY_FENCE __sync_synchronize ()
863 #elif _MSC_VER >= 1500 /* VC++ 2008 */
864 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
865 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
866 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
867 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
868 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
869 #elif _MSC_VER >= 1400 /* VC++ 2005 */
870 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
871 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
872 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
873 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
874 #elif defined _WIN32
875 #include <WinNT.h>
876 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
877 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
878 #include <mbarrier.h>
879 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
880 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
881 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
882 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
883 #elif __xlC__
884 #define ECB_MEMORY_FENCE __sync ()
885 #endif
886#endif
887
888#ifndef ECB_MEMORY_FENCE
889 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
890 /* we assume that these memory fences work on all variables/all memory accesses, */
891 /* not just C11 atomics and atomic accesses */
892 #include <stdatomic.h>
893 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
894 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
895 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
896 #endif
897#endif
898
899#ifndef ECB_MEMORY_FENCE
900 #if !ECB_AVOID_PTHREADS
901 /*
902 * if you get undefined symbol references to pthread_mutex_lock,
903 * or failure to find pthread.h, then you should implement
904 * the ECB_MEMORY_FENCE operations for your cpu/compiler
905 * OR provide pthread.h and link against the posix thread library
906 * of your system.
907 */
908 #include <pthread.h>
909 #define ECB_NEEDS_PTHREADS 1
910 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
911
912 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
913 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
914 #endif
915#endif
916
917#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
918 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
919#endif
920
921#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
922 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
923#endif
924
925#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
926 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
927#endif
928
929/*****************************************************************************/
930
931#if ECB_CPP
932 #define ecb_inline static inline
933#elif ECB_GCC_VERSION(2,5)
934 #define ecb_inline static __inline__
935#elif ECB_C99
936 #define ecb_inline static inline
937#else
938 #define ecb_inline static
939#endif
940
941#if ECB_GCC_VERSION(3,3)
942 #define ecb_restrict __restrict__
943#elif ECB_C99
944 #define ecb_restrict restrict
945#else
946 #define ecb_restrict
947#endif
948
949typedef int ecb_bool;
950
951#define ECB_CONCAT_(a, b) a ## b
952#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
953#define ECB_STRINGIFY_(a) # a
954#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
955#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
956
957#define ecb_function_ ecb_inline
958
959#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
960 #define ecb_attribute(attrlist) __attribute__ (attrlist)
961#else
962 #define ecb_attribute(attrlist)
963#endif
964
965#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
966 #define ecb_is_constant(expr) __builtin_constant_p (expr)
967#else
968 /* possible C11 impl for integral types
969 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
970 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
971
972 #define ecb_is_constant(expr) 0
973#endif
974
975#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
976 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
977#else
978 #define ecb_expect(expr,value) (expr)
979#endif
980
981#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
982 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
983#else
984 #define ecb_prefetch(addr,rw,locality)
985#endif
986
987/* no emulation for ecb_decltype */
988#if ECB_CPP11
989 // older implementations might have problems with decltype(x)::type, work around it
990 template<class T> struct ecb_decltype_t { typedef T type; };
991 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
992#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
993 #define ecb_decltype(x) __typeof__ (x)
994#endif
995
996#if _MSC_VER >= 1300
997 #define ecb_deprecated __declspec (deprecated)
998#else
999 #define ecb_deprecated ecb_attribute ((__deprecated__))
1000#endif
1001
1002#if _MSC_VER >= 1500
1003 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
1004#elif ECB_GCC_VERSION(4,5)
1005 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
1006#else
1007 #define ecb_deprecated_message(msg) ecb_deprecated
1008#endif
1009
1010#if _MSC_VER >= 1400
1011 #define ecb_noinline __declspec (noinline)
1012#else
1013 #define ecb_noinline ecb_attribute ((__noinline__))
1014#endif
1015
1016#define ecb_unused ecb_attribute ((__unused__))
1017#define ecb_const ecb_attribute ((__const__))
1018#define ecb_pure ecb_attribute ((__pure__))
1019
1020#if ECB_C11 || __IBMC_NORETURN
1021 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
1022 #define ecb_noreturn _Noreturn
1023#elif ECB_CPP11
1024 #define ecb_noreturn [[noreturn]]
1025#elif _MSC_VER >= 1200
1026 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
1027 #define ecb_noreturn __declspec (noreturn)
1028#else
1029 #define ecb_noreturn ecb_attribute ((__noreturn__))
1030#endif
1031
1032#if ECB_GCC_VERSION(4,3)
1033 #define ecb_artificial ecb_attribute ((__artificial__))
1034 #define ecb_hot ecb_attribute ((__hot__))
1035 #define ecb_cold ecb_attribute ((__cold__))
1036#else
1037 #define ecb_artificial
1038 #define ecb_hot
1039 #define ecb_cold
1040#endif
1041
1042/* put around conditional expressions if you are very sure that the */
1043/* expression is mostly true or mostly false. note that these return */
1044/* booleans, not the expression. */
1045#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
1046#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
1047/* for compatibility to the rest of the world */
1048#define ecb_likely(expr) ecb_expect_true (expr)
1049#define ecb_unlikely(expr) ecb_expect_false (expr)
1050
1051/* count trailing zero bits and count # of one bits */
1052#if ECB_GCC_VERSION(3,4) \
1053 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1054 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1055 && ECB_CLANG_BUILTIN(__builtin_popcount))
1056 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1057 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1058 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1059 #define ecb_ctz32(x) __builtin_ctz (x)
1060 #define ecb_ctz64(x) __builtin_ctzll (x)
1061 #define ecb_popcount32(x) __builtin_popcount (x)
1062 /* no popcountll */
1063#else
1064 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1065 ecb_function_ ecb_const int
1066 ecb_ctz32 (uint32_t x)
1067 {
1068#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1069 unsigned long r;
1070 _BitScanForward (&r, x);
1071 return (int)r;
1072#else
1073 int r = 0;
1074
1075 x &= ~x + 1; /* this isolates the lowest bit */
1076
1077#if ECB_branchless_on_i386
1078 r += !!(x & 0xaaaaaaaa) << 0;
1079 r += !!(x & 0xcccccccc) << 1;
1080 r += !!(x & 0xf0f0f0f0) << 2;
1081 r += !!(x & 0xff00ff00) << 3;
1082 r += !!(x & 0xffff0000) << 4;
1083#else
1084 if (x & 0xaaaaaaaa) r += 1;
1085 if (x & 0xcccccccc) r += 2;
1086 if (x & 0xf0f0f0f0) r += 4;
1087 if (x & 0xff00ff00) r += 8;
1088 if (x & 0xffff0000) r += 16;
1089#endif
1090
1091 return r;
1092#endif
1093 }
1094
1095 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1096 ecb_function_ ecb_const int
1097 ecb_ctz64 (uint64_t x)
1098 {
1099#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1100 unsigned long r;
1101 _BitScanForward64 (&r, x);
1102 return (int)r;
1103#else
1104 int shift = x & 0xffffffff ? 0 : 32;
1105 return ecb_ctz32 (x >> shift) + shift;
1106#endif
1107 }
1108
1109 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1110 ecb_function_ ecb_const int
1111 ecb_popcount32 (uint32_t x)
1112 {
1113 x -= (x >> 1) & 0x55555555;
1114 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1115 x = ((x >> 4) + x) & 0x0f0f0f0f;
1116 x *= 0x01010101;
1117
1118 return x >> 24;
1119 }
1120
1121 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1122 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1123 {
1124#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1125 unsigned long r;
1126 _BitScanReverse (&r, x);
1127 return (int)r;
1128#else
1129 int r = 0;
1130
1131 if (x >> 16) { x >>= 16; r += 16; }
1132 if (x >> 8) { x >>= 8; r += 8; }
1133 if (x >> 4) { x >>= 4; r += 4; }
1134 if (x >> 2) { x >>= 2; r += 2; }
1135 if (x >> 1) { r += 1; }
1136
1137 return r;
1138#endif
1139 }
1140
1141 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1142 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1143 {
1144#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1145 unsigned long r;
1146 _BitScanReverse64 (&r, x);
1147 return (int)r;
1148#else
1149 int r = 0;
1150
1151 if (x >> 32) { x >>= 32; r += 32; }
1152
1153 return r + ecb_ld32 (x);
1154#endif
1155 }
1156#endif
1157
1158ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1159ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1160ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1161ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1162
1163ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1164ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1165{
1166 return ( (x * 0x0802U & 0x22110U)
1167 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1168}
1169
1170ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1171ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1172{
1173 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1174 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1175 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1176 x = ( x >> 8 ) | ( x << 8);
1177
1178 return x;
1179}
1180
1181ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1182ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1183{
1184 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1185 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1186 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1187 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1188 x = ( x >> 16 ) | ( x << 16);
1189
1190 return x;
1191}
1192
1193/* popcount64 is only available on 64 bit cpus as gcc builtin */
1194/* so for this version we are lazy */
1195ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1196ecb_function_ ecb_const int
1197ecb_popcount64 (uint64_t x)
1198{
1199 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1200}
1201
1202ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1203ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1204ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1205ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1206ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1207ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1208ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1209ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1210
1211ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1212ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1213ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1214ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1215ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1216ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1217ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1218ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1219
1220#if ECB_CPP
1221
1222inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
1223inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
1224inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
1225inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
1226
1227inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
1228inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
1229inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
1230inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
1231
1232inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
1233inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
1234inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
1235inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
1236
1237inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
1238inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
1239inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
1240inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
1241
1242inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
1243inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
1244inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
1245
1246inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
1247inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
1248inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
1249inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
1250
1251inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
1252inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
1253inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
1254inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
1255
1256#endif
1257
1258#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1259 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1260 #define ecb_bswap16(x) __builtin_bswap16 (x)
1261 #else
1262 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1263 #endif
1264 #define ecb_bswap32(x) __builtin_bswap32 (x)
1265 #define ecb_bswap64(x) __builtin_bswap64 (x)
1266#elif _MSC_VER
1267 #include <stdlib.h>
1268 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1269 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1270 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1271#else
1272 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1273 ecb_function_ ecb_const uint16_t
1274 ecb_bswap16 (uint16_t x)
1275 {
1276 return ecb_rotl16 (x, 8);
1277 }
1278
1279 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1280 ecb_function_ ecb_const uint32_t
1281 ecb_bswap32 (uint32_t x)
1282 {
1283 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1284 }
1285
1286 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1287 ecb_function_ ecb_const uint64_t
1288 ecb_bswap64 (uint64_t x)
1289 {
1290 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1291 }
1292#endif
1293
1294#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1295 #define ecb_unreachable() __builtin_unreachable ()
1296#else
1297 /* this seems to work fine, but gcc always emits a warning for it :/ */
1298 ecb_inline ecb_noreturn void ecb_unreachable (void);
1299 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1300#endif
1301
1302/* try to tell the compiler that some condition is definitely true */
1303#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1304
1305ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1306ecb_inline ecb_const uint32_t
1307ecb_byteorder_helper (void)
1308{
1309 /* the union code still generates code under pressure in gcc, */
1310 /* but less than using pointers, and always seems to */
1311 /* successfully return a constant. */
1312 /* the reason why we have this horrible preprocessor mess */
1313 /* is to avoid it in all cases, at least on common architectures */
1314 /* or when using a recent enough gcc version (>= 4.6) */
1315#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1316 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1317 #define ECB_LITTLE_ENDIAN 1
1318 return 0x44332211;
1319#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1320 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1321 #define ECB_BIG_ENDIAN 1
1322 return 0x11223344;
1323#else
1324 union
1325 {
1326 uint8_t c[4];
1327 uint32_t u;
1328 } u = { 0x11, 0x22, 0x33, 0x44 };
1329 return u.u;
1330#endif
1331}
1332
1333ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1334ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1335ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1336ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1337
1338/*****************************************************************************/
1339/* unaligned load/store */
1340
1341ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1342ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1343ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1344
1345ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1346ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1347ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1348
1349ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1350ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1351ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1352
1353ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
1354ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
1355ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
1356
1357ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
1358ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
1359ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
1360
1361ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1362ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1363ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1364
1365ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1366ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1367ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1368
1369ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
1370ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
1371ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
1372
1373ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
1374ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
1375ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
1376
1377ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
1378ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
1379ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
1380
1381#if ECB_CPP
1382
1383inline uint8_t ecb_bswap (uint8_t v) { return v; }
1384inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
1385inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
1386inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
1387
1388template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1389template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1390template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
1391template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
1392template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
1393template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
1394template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
1395template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
1396
1397template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1398template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1399template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
1400template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
1401template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
1402template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
1403template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
1404template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
1405
1406#endif
1407
1408/*****************************************************************************/
1409
1410#if ECB_GCC_VERSION(3,0) || ECB_C99
1411 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1412#else
1413 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1414#endif
1415
1416#if ECB_CPP
1417 template<typename T>
1418 static inline T ecb_div_rd (T val, T div)
1419 {
1420 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1421 }
1422 template<typename T>
1423 static inline T ecb_div_ru (T val, T div)
1424 {
1425 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1426 }
1427#else
1428 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1429 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1430#endif
1431
1432#if ecb_cplusplus_does_not_suck
1433 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1434 template<typename T, int N>
1435 static inline int ecb_array_length (const T (&arr)[N])
1436 {
1437 return N;
1438 }
1439#else
1440 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1441#endif
1442
1443/*****************************************************************************/
1444
1445ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1446ecb_function_ ecb_const uint32_t
1447ecb_binary16_to_binary32 (uint32_t x)
1448{
1449 unsigned int s = (x & 0x8000) << (31 - 15);
1450 int e = (x >> 10) & 0x001f;
1451 unsigned int m = x & 0x03ff;
1452
1453 if (ecb_expect_false (e == 31))
1454 /* infinity or NaN */
1455 e = 255 - (127 - 15);
1456 else if (ecb_expect_false (!e))
1457 {
1458 if (ecb_expect_true (!m))
1459 /* zero, handled by code below by forcing e to 0 */
1460 e = 0 - (127 - 15);
1461 else
1462 {
1463 /* subnormal, renormalise */
1464 unsigned int s = 10 - ecb_ld32 (m);
1465
1466 m = (m << s) & 0x3ff; /* mask implicit bit */
1467 e -= s - 1;
1468 }
1469 }
1470
1471 /* e and m now are normalised, or zero, (or inf or nan) */
1472 e += 127 - 15;
1473
1474 return s | (e << 23) | (m << (23 - 10));
1475}
1476
1477ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1478ecb_function_ ecb_const uint16_t
1479ecb_binary32_to_binary16 (uint32_t x)
1480{
1481 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1482 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1483 unsigned int m = x & 0x007fffff;
1484
1485 x &= 0x7fffffff;
1486
1487 /* if it's within range of binary16 normals, use fast path */
1488 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1489 {
1490 /* mantissa round-to-even */
1491 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1492
1493 /* handle overflow */
1494 if (ecb_expect_false (m >= 0x00800000))
1495 {
1496 m >>= 1;
1497 e += 1;
1498 }
1499
1500 return s | (e << 10) | (m >> (23 - 10));
1501 }
1502
1503 /* handle large numbers and infinity */
1504 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1505 return s | 0x7c00;
1506
1507 /* handle zero, subnormals and small numbers */
1508 if (ecb_expect_true (x < 0x38800000))
1509 {
1510 /* zero */
1511 if (ecb_expect_true (!x))
1512 return s;
1513
1514 /* handle subnormals */
1515
1516 /* too small, will be zero */
1517 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1518 return s;
1519
1520 m |= 0x00800000; /* make implicit bit explicit */
1521
1522 /* very tricky - we need to round to the nearest e (+10) bit value */
1523 {
1524 unsigned int bits = 14 - e;
1525 unsigned int half = (1 << (bits - 1)) - 1;
1526 unsigned int even = (m >> bits) & 1;
1527
1528 /* if this overflows, we will end up with a normalised number */
1529 m = (m + half + even) >> bits;
1530 }
1531
1532 return s | m;
1533 }
1534
1535 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1536 m >>= 13;
1537
1538 return s | 0x7c00 | m | !m;
1539}
1540
1541/*******************************************************************************/
1542/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1543
1544/* basically, everything uses "ieee pure-endian" floating point numbers */
1545/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1546#if 0 \
1547 || __i386 || __i386__ \
1548 || ECB_GCC_AMD64 \
1549 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1550 || defined __s390__ || defined __s390x__ \
1551 || defined __mips__ \
1552 || defined __alpha__ \
1553 || defined __hppa__ \
1554 || defined __ia64__ \
1555 || defined __m68k__ \
1556 || defined __m88k__ \
1557 || defined __sh__ \
1558 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1559 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1560 || defined __aarch64__
1561 #define ECB_STDFP 1
1562#else
1563 #define ECB_STDFP 0
1564#endif
1565
1566#ifndef ECB_NO_LIBM
1567
1568 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1569
1570 /* only the oldest of old doesn't have this one. solaris. */
1571 #ifdef INFINITY
1572 #define ECB_INFINITY INFINITY
1573 #else
1574 #define ECB_INFINITY HUGE_VAL
1575 #endif
1576
1577 #ifdef NAN
1578 #define ECB_NAN NAN
1579 #else
1580 #define ECB_NAN ECB_INFINITY
1581 #endif
1582
1583 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1584 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1585 #define ecb_frexpf(x,e) frexpf ((x), (e))
1586 #else
1587 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1588 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1589 #endif
1590
1591 /* convert a float to ieee single/binary32 */
1592 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1593 ecb_function_ ecb_const uint32_t
1594 ecb_float_to_binary32 (float x)
1595 {
1596 uint32_t r;
1597
1598 #if ECB_STDFP
1599 memcpy (&r, &x, 4);
1600 #else
1601 /* slow emulation, works for anything but -0 */
1602 uint32_t m;
1603 int e;
1604
1605 if (x == 0e0f ) return 0x00000000U;
1606 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1607 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1608 if (x != x ) return 0x7fbfffffU;
1609
1610 m = ecb_frexpf (x, &e) * 0x1000000U;
1611
1612 r = m & 0x80000000U;
1613
1614 if (r)
1615 m = -m;
1616
1617 if (e <= -126)
1618 {
1619 m &= 0xffffffU;
1620 m >>= (-125 - e);
1621 e = -126;
1622 }
1623
1624 r |= (e + 126) << 23;
1625 r |= m & 0x7fffffU;
1626 #endif
1627
1628 return r;
1629 }
1630
1631 /* converts an ieee single/binary32 to a float */
1632 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1633 ecb_function_ ecb_const float
1634 ecb_binary32_to_float (uint32_t x)
1635 {
1636 float r;
1637
1638 #if ECB_STDFP
1639 memcpy (&r, &x, 4);
1640 #else
1641 /* emulation, only works for normals and subnormals and +0 */
1642 int neg = x >> 31;
1643 int e = (x >> 23) & 0xffU;
1644
1645 x &= 0x7fffffU;
1646
1647 if (e)
1648 x |= 0x800000U;
1649 else
1650 e = 1;
1651
1652 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1653 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1654
1655 r = neg ? -r : r;
1656 #endif
1657
1658 return r;
1659 }
1660
1661 /* convert a double to ieee double/binary64 */
1662 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1663 ecb_function_ ecb_const uint64_t
1664 ecb_double_to_binary64 (double x)
1665 {
1666 uint64_t r;
1667
1668 #if ECB_STDFP
1669 memcpy (&r, &x, 8);
1670 #else
1671 /* slow emulation, works for anything but -0 */
1672 uint64_t m;
1673 int e;
1674
1675 if (x == 0e0 ) return 0x0000000000000000U;
1676 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1677 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1678 if (x != x ) return 0X7ff7ffffffffffffU;
1679
1680 m = frexp (x, &e) * 0x20000000000000U;
1681
1682 r = m & 0x8000000000000000;;
1683
1684 if (r)
1685 m = -m;
1686
1687 if (e <= -1022)
1688 {
1689 m &= 0x1fffffffffffffU;
1690 m >>= (-1021 - e);
1691 e = -1022;
1692 }
1693
1694 r |= ((uint64_t)(e + 1022)) << 52;
1695 r |= m & 0xfffffffffffffU;
1696 #endif
1697
1698 return r;
1699 }
1700
1701 /* converts an ieee double/binary64 to a double */
1702 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1703 ecb_function_ ecb_const double
1704 ecb_binary64_to_double (uint64_t x)
1705 {
1706 double r;
1707
1708 #if ECB_STDFP
1709 memcpy (&r, &x, 8);
1710 #else
1711 /* emulation, only works for normals and subnormals and +0 */
1712 int neg = x >> 63;
1713 int e = (x >> 52) & 0x7ffU;
1714
1715 x &= 0xfffffffffffffU;
1716
1717 if (e)
1718 x |= 0x10000000000000U;
1719 else
1720 e = 1;
1721
1722 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1723 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1724
1725 r = neg ? -r : r;
1726 #endif
1727
1728 return r;
1729 }
1730
1731 /* convert a float to ieee half/binary16 */
1732 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1733 ecb_function_ ecb_const uint16_t
1734 ecb_float_to_binary16 (float x)
1735 {
1736 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1737 }
1738
1739 /* convert an ieee half/binary16 to float */
1740 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1741 ecb_function_ ecb_const float
1742 ecb_binary16_to_float (uint16_t x)
1743 {
1744 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1745 }
1746
1747#endif
1748
1749#endif
1750
1751/* ECB.H END */
1752
1753#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1754/* if your architecture doesn't need memory fences, e.g. because it is
1755 * single-cpu/core, or if you use libev in a project that doesn't use libev
1756 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1757 * libev, in which cases the memory fences become nops.
1758 * alternatively, you can remove this #error and link against libpthread,
1759 * which will then provide the memory fences.
1760 */
1761# error "memory fences not defined for your architecture, please report"
1762#endif
1763
1764#ifndef ECB_MEMORY_FENCE
1765# define ECB_MEMORY_FENCE do { } while (0)
1766# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1767# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1768#endif
1769
1770#define inline_size ecb_inline
1771
1772#if EV_FEATURE_CODE
386# define inline_speed static inline 1773# define inline_speed ecb_inline
1774#else
1775# define inline_speed ecb_noinline static
387#endif 1776#endif
388 1777
1778/*****************************************************************************/
1779/* raw syscall wrappers */
1780
1781#if EV_NEED_SYSCALL
1782
1783#include <sys/syscall.h>
1784
1785/*
1786 * define some syscall wrappers for common architectures
1787 * this is mostly for nice looks during debugging, not performance.
1788 * our syscalls return < 0, not == -1, on error. which is good
1789 * enough for linux aio.
1790 * TODO: arm is also common nowadays, maybe even mips and x86
1791 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1792 */
1793#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
1794 /* the costly errno access probably kills this for size optimisation */
1795
1796 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1797 ({ \
1798 long res; \
1799 register unsigned long r6 __asm__ ("r9" ); \
1800 register unsigned long r5 __asm__ ("r8" ); \
1801 register unsigned long r4 __asm__ ("r10"); \
1802 register unsigned long r3 __asm__ ("rdx"); \
1803 register unsigned long r2 __asm__ ("rsi"); \
1804 register unsigned long r1 __asm__ ("rdi"); \
1805 if (narg >= 6) r6 = (unsigned long)(arg6); \
1806 if (narg >= 5) r5 = (unsigned long)(arg5); \
1807 if (narg >= 4) r4 = (unsigned long)(arg4); \
1808 if (narg >= 3) r3 = (unsigned long)(arg3); \
1809 if (narg >= 2) r2 = (unsigned long)(arg2); \
1810 if (narg >= 1) r1 = (unsigned long)(arg1); \
1811 __asm__ __volatile__ ( \
1812 "syscall\n\t" \
1813 : "=a" (res) \
1814 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1815 : "cc", "r11", "cx", "memory"); \
1816 errno = -res; \
1817 res; \
1818 })
1819
1820#endif
1821
1822#ifdef ev_syscall
1823 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1824 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1825 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1826 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1827 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1828 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1829 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1830#else
1831 #define ev_syscall0(nr) syscall (nr)
1832 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1833 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1834 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1835 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1836 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1837 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1838#endif
1839
1840#endif
1841
1842/*****************************************************************************/
1843
389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1844#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1845
1846#if EV_MINPRI == EV_MAXPRI
1847# define ABSPRI(w) (((W)w), 0)
1848#else
390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1849# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1850#endif
391 1851
392#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1852#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394 1853
395typedef ev_watcher *W; 1854typedef ev_watcher *W;
396typedef ev_watcher_list *WL; 1855typedef ev_watcher_list *WL;
397typedef ev_watcher_time *WT; 1856typedef ev_watcher_time *WT;
398 1857
399#define ev_active(w) ((W)(w))->active 1858#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at 1859#define ev_at(w) ((WT)(w))->at
401 1860
402#if EV_USE_REALTIME 1861#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 1862/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */ 1863/* giving it a reasonably high chance of working on typical architectures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1864static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif 1865#endif
407 1866
408#if EV_USE_MONOTONIC 1867#if EV_USE_MONOTONIC
409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1868static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif 1869#endif
411 1870
1871#ifndef EV_FD_TO_WIN32_HANDLE
1872# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1873#endif
1874#ifndef EV_WIN32_HANDLE_TO_FD
1875# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1876#endif
1877#ifndef EV_WIN32_CLOSE_FD
1878# define EV_WIN32_CLOSE_FD(fd) close (fd)
1879#endif
1880
412#ifdef _WIN32 1881#ifdef _WIN32
413# include "ev_win32.c" 1882# include "ev_win32.c"
414#endif 1883#endif
415 1884
416/*****************************************************************************/ 1885/*****************************************************************************/
417 1886
1887#if EV_USE_LINUXAIO
1888# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1889#endif
1890
1891/* define a suitable floor function (only used by periodics atm) */
1892
1893#if EV_USE_FLOOR
1894# include <math.h>
1895# define ev_floor(v) floor (v)
1896#else
1897
1898#include <float.h>
1899
1900/* a floor() replacement function, should be independent of ev_tstamp type */
1901ecb_noinline
1902static ev_tstamp
1903ev_floor (ev_tstamp v)
1904{
1905 /* the choice of shift factor is not terribly important */
1906#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1907 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1908#else
1909 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1910#endif
1911
1912 /* special treatment for negative arguments */
1913 if (ecb_expect_false (v < 0.))
1914 {
1915 ev_tstamp f = -ev_floor (-v);
1916
1917 return f - (f == v ? 0 : 1);
1918 }
1919
1920 /* argument too large for an unsigned long? then reduce it */
1921 if (ecb_expect_false (v >= shift))
1922 {
1923 ev_tstamp f;
1924
1925 if (v == v - 1.)
1926 return v; /* very large numbers are assumed to be integer */
1927
1928 f = shift * ev_floor (v * (1. / shift));
1929 return f + ev_floor (v - f);
1930 }
1931
1932 /* fits into an unsigned long */
1933 return (unsigned long)v;
1934}
1935
1936#endif
1937
1938/*****************************************************************************/
1939
1940#ifdef __linux
1941# include <sys/utsname.h>
1942#endif
1943
1944ecb_noinline ecb_cold
1945static unsigned int
1946ev_linux_version (void)
1947{
1948#ifdef __linux
1949 unsigned int v = 0;
1950 struct utsname buf;
1951 int i;
1952 char *p = buf.release;
1953
1954 if (uname (&buf))
1955 return 0;
1956
1957 for (i = 3+1; --i; )
1958 {
1959 unsigned int c = 0;
1960
1961 for (;;)
1962 {
1963 if (*p >= '0' && *p <= '9')
1964 c = c * 10 + *p++ - '0';
1965 else
1966 {
1967 p += *p == '.';
1968 break;
1969 }
1970 }
1971
1972 v = (v << 8) | c;
1973 }
1974
1975 return v;
1976#else
1977 return 0;
1978#endif
1979}
1980
1981/*****************************************************************************/
1982
1983#if EV_AVOID_STDIO
1984ecb_noinline ecb_cold
1985static void
1986ev_printerr (const char *msg)
1987{
1988 write (STDERR_FILENO, msg, strlen (msg));
1989}
1990#endif
1991
418static void (*syserr_cb)(const char *msg); 1992static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
419 1993
1994ecb_cold
420void 1995void
421ev_set_syserr_cb (void (*cb)(const char *msg)) 1996ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
422{ 1997{
423 syserr_cb = cb; 1998 syserr_cb = cb;
424} 1999}
425 2000
426static void noinline 2001ecb_noinline ecb_cold
2002static void
427ev_syserr (const char *msg) 2003ev_syserr (const char *msg)
428{ 2004{
429 if (!msg) 2005 if (!msg)
430 msg = "(libev) system error"; 2006 msg = "(libev) system error";
431 2007
432 if (syserr_cb) 2008 if (syserr_cb)
433 syserr_cb (msg); 2009 syserr_cb (msg);
434 else 2010 else
435 { 2011 {
2012#if EV_AVOID_STDIO
2013 ev_printerr (msg);
2014 ev_printerr (": ");
2015 ev_printerr (strerror (errno));
2016 ev_printerr ("\n");
2017#else
436 perror (msg); 2018 perror (msg);
2019#endif
437 abort (); 2020 abort ();
438 } 2021 }
439} 2022}
440 2023
441static void * 2024static void *
442ev_realloc_emul (void *ptr, long size) 2025ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
443{ 2026{
444 /* some systems, notably openbsd and darwin, fail to properly 2027 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and 2028 * implement realloc (x, 0) (as required by both ansi c-89 and
446 * the single unix specification, so work around them here. 2029 * the single unix specification, so work around them here.
2030 * recently, also (at least) fedora and debian started breaking it,
2031 * despite documenting it otherwise.
447 */ 2032 */
448 2033
449 if (size) 2034 if (size)
450 return realloc (ptr, size); 2035 return realloc (ptr, size);
451 2036
452 free (ptr); 2037 free (ptr);
453 return 0; 2038 return 0;
454} 2039}
455 2040
456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 2041static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
457 2042
2043ecb_cold
458void 2044void
459ev_set_allocator (void *(*cb)(void *ptr, long size)) 2045ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
460{ 2046{
461 alloc = cb; 2047 alloc = cb;
462} 2048}
463 2049
464inline_speed void * 2050inline_speed void *
… …
466{ 2052{
467 ptr = alloc (ptr, size); 2053 ptr = alloc (ptr, size);
468 2054
469 if (!ptr && size) 2055 if (!ptr && size)
470 { 2056 {
2057#if EV_AVOID_STDIO
2058 ev_printerr ("(libev) memory allocation failed, aborting.\n");
2059#else
471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 2060 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
2061#endif
472 abort (); 2062 abort ();
473 } 2063 }
474 2064
475 return ptr; 2065 return ptr;
476} 2066}
… …
478#define ev_malloc(size) ev_realloc (0, (size)) 2068#define ev_malloc(size) ev_realloc (0, (size))
479#define ev_free(ptr) ev_realloc ((ptr), 0) 2069#define ev_free(ptr) ev_realloc ((ptr), 0)
480 2070
481/*****************************************************************************/ 2071/*****************************************************************************/
482 2072
2073/* set in reify when reification needed */
2074#define EV_ANFD_REIFY 1
2075
2076/* file descriptor info structure */
483typedef struct 2077typedef struct
484{ 2078{
485 WL head; 2079 WL head;
486 unsigned char events; 2080 unsigned char events; /* the events watched for */
487 unsigned char reify; 2081 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
488 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 2082 unsigned char emask; /* some backends store the actual kernel mask in here */
489 unsigned char unused; 2083 unsigned char eflags; /* flags field for use by backends */
490#if EV_USE_EPOLL 2084#if EV_USE_EPOLL
491 unsigned int egen; /* generation counter to counter epoll bugs */ 2085 unsigned int egen; /* generation counter to counter epoll bugs */
492#endif 2086#endif
493#if EV_SELECT_IS_WINSOCKET 2087#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
494 SOCKET handle; 2088 SOCKET handle;
495#endif 2089#endif
2090#if EV_USE_IOCP
2091 OVERLAPPED or, ow;
2092#endif
496} ANFD; 2093} ANFD;
497 2094
2095/* stores the pending event set for a given watcher */
498typedef struct 2096typedef struct
499{ 2097{
500 W w; 2098 W w;
501 int events; 2099 int events; /* the pending event set for the given watcher */
502} ANPENDING; 2100} ANPENDING;
503 2101
504#if EV_USE_INOTIFY 2102#if EV_USE_INOTIFY
505/* hash table entry per inotify-id */ 2103/* hash table entry per inotify-id */
506typedef struct 2104typedef struct
… …
509} ANFS; 2107} ANFS;
510#endif 2108#endif
511 2109
512/* Heap Entry */ 2110/* Heap Entry */
513#if EV_HEAP_CACHE_AT 2111#if EV_HEAP_CACHE_AT
2112 /* a heap element */
514 typedef struct { 2113 typedef struct {
515 ev_tstamp at; 2114 ev_tstamp at;
516 WT w; 2115 WT w;
517 } ANHE; 2116 } ANHE;
518 2117
519 #define ANHE_w(he) (he).w /* access watcher, read-write */ 2118 #define ANHE_w(he) (he).w /* access watcher, read-write */
520 #define ANHE_at(he) (he).at /* access cached at, read-only */ 2119 #define ANHE_at(he) (he).at /* access cached at, read-only */
521 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 2120 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522#else 2121#else
2122 /* a heap element */
523 typedef WT ANHE; 2123 typedef WT ANHE;
524 2124
525 #define ANHE_w(he) (he) 2125 #define ANHE_w(he) (he)
526 #define ANHE_at(he) (he)->at 2126 #define ANHE_at(he) (he)->at
527 #define ANHE_at_cache(he) 2127 #define ANHE_at_cache(he)
… …
538 #undef VAR 2138 #undef VAR
539 }; 2139 };
540 #include "ev_wrap.h" 2140 #include "ev_wrap.h"
541 2141
542 static struct ev_loop default_loop_struct; 2142 static struct ev_loop default_loop_struct;
543 struct ev_loop *ev_default_loop_ptr; 2143 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
544 2144
545#else 2145#else
546 2146
547 ev_tstamp ev_rt_now; 2147 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
548 #define VAR(name,decl) static decl; 2148 #define VAR(name,decl) static decl;
549 #include "ev_vars.h" 2149 #include "ev_vars.h"
550 #undef VAR 2150 #undef VAR
551 2151
552 static int ev_default_loop_ptr; 2152 static int ev_default_loop_ptr;
553 2153
554#endif 2154#endif
555 2155
2156#if EV_FEATURE_API
2157# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
2158# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
2159# define EV_INVOKE_PENDING invoke_cb (EV_A)
2160#else
2161# define EV_RELEASE_CB (void)0
2162# define EV_ACQUIRE_CB (void)0
2163# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
2164#endif
2165
2166#define EVBREAK_RECURSE 0x80
2167
556/*****************************************************************************/ 2168/*****************************************************************************/
557 2169
2170#ifndef EV_HAVE_EV_TIME
558ev_tstamp 2171ev_tstamp
559ev_time (void) 2172ev_time (void) EV_NOEXCEPT
560{ 2173{
561#if EV_USE_REALTIME 2174#if EV_USE_REALTIME
562 if (expect_true (have_realtime)) 2175 if (ecb_expect_true (have_realtime))
563 { 2176 {
564 struct timespec ts; 2177 struct timespec ts;
565 clock_gettime (CLOCK_REALTIME, &ts); 2178 clock_gettime (CLOCK_REALTIME, &ts);
566 return ts.tv_sec + ts.tv_nsec * 1e-9; 2179 return EV_TS_GET (ts);
567 } 2180 }
568#endif 2181#endif
569 2182
2183 {
570 struct timeval tv; 2184 struct timeval tv;
571 gettimeofday (&tv, 0); 2185 gettimeofday (&tv, 0);
572 return tv.tv_sec + tv.tv_usec * 1e-6; 2186 return EV_TV_GET (tv);
2187 }
573} 2188}
2189#endif
574 2190
575inline_size ev_tstamp 2191inline_size ev_tstamp
576get_clock (void) 2192get_clock (void)
577{ 2193{
578#if EV_USE_MONOTONIC 2194#if EV_USE_MONOTONIC
579 if (expect_true (have_monotonic)) 2195 if (ecb_expect_true (have_monotonic))
580 { 2196 {
581 struct timespec ts; 2197 struct timespec ts;
582 clock_gettime (CLOCK_MONOTONIC, &ts); 2198 clock_gettime (CLOCK_MONOTONIC, &ts);
583 return ts.tv_sec + ts.tv_nsec * 1e-9; 2199 return EV_TS_GET (ts);
584 } 2200 }
585#endif 2201#endif
586 2202
587 return ev_time (); 2203 return ev_time ();
588} 2204}
589 2205
590#if EV_MULTIPLICITY 2206#if EV_MULTIPLICITY
591ev_tstamp 2207ev_tstamp
592ev_now (EV_P) 2208ev_now (EV_P) EV_NOEXCEPT
593{ 2209{
594 return ev_rt_now; 2210 return ev_rt_now;
595} 2211}
596#endif 2212#endif
597 2213
598void 2214void
599ev_sleep (ev_tstamp delay) 2215ev_sleep (ev_tstamp delay) EV_NOEXCEPT
600{ 2216{
601 if (delay > 0.) 2217 if (delay > EV_TS_CONST (0.))
602 { 2218 {
603#if EV_USE_NANOSLEEP 2219#if EV_USE_NANOSLEEP
604 struct timespec ts; 2220 struct timespec ts;
605 2221
606 ts.tv_sec = (time_t)delay; 2222 EV_TS_SET (ts, delay);
607 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
608
609 nanosleep (&ts, 0); 2223 nanosleep (&ts, 0);
610#elif defined(_WIN32) 2224#elif defined _WIN32
2225 /* maybe this should round up, as ms is very low resolution */
2226 /* compared to select (µs) or nanosleep (ns) */
611 Sleep ((unsigned long)(delay * 1e3)); 2227 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
612#else 2228#else
613 struct timeval tv; 2229 struct timeval tv;
614 2230
615 tv.tv_sec = (time_t)delay;
616 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617
618 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2231 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619 /* somehting nto guaranteed by newer posix versions, but guaranteed */ 2232 /* something not guaranteed by newer posix versions, but guaranteed */
620 /* by older ones */ 2233 /* by older ones */
2234 EV_TV_SET (tv, delay);
621 select (0, 0, 0, 0, &tv); 2235 select (0, 0, 0, 0, &tv);
622#endif 2236#endif
623 } 2237 }
624} 2238}
625 2239
626/*****************************************************************************/ 2240/*****************************************************************************/
627 2241
628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 2242#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
629 2243
2244/* find a suitable new size for the given array, */
2245/* hopefully by rounding to a nice-to-malloc size */
630inline_size int 2246inline_size int
631array_nextsize (int elem, int cur, int cnt) 2247array_nextsize (int elem, int cur, int cnt)
632{ 2248{
633 int ncur = cur + 1; 2249 int ncur = cur + 1;
634 2250
635 do 2251 do
636 ncur <<= 1; 2252 ncur <<= 1;
637 while (cnt > ncur); 2253 while (cnt > ncur);
638 2254
639 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 2255 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
640 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2256 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
641 { 2257 {
642 ncur *= elem; 2258 ncur *= elem;
643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 2259 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
644 ncur = ncur - sizeof (void *) * 4; 2260 ncur = ncur - sizeof (void *) * 4;
… …
646 } 2262 }
647 2263
648 return ncur; 2264 return ncur;
649} 2265}
650 2266
651static noinline void * 2267ecb_noinline ecb_cold
2268static void *
652array_realloc (int elem, void *base, int *cur, int cnt) 2269array_realloc (int elem, void *base, int *cur, int cnt)
653{ 2270{
654 *cur = array_nextsize (elem, *cur, cnt); 2271 *cur = array_nextsize (elem, *cur, cnt);
655 return ev_realloc (base, elem * *cur); 2272 return ev_realloc (base, elem * *cur);
656} 2273}
657 2274
2275#define array_needsize_noinit(base,offset,count)
2276
658#define array_init_zero(base,count) \ 2277#define array_needsize_zerofill(base,offset,count) \
659 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2278 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
660 2279
661#define array_needsize(type,base,cur,cnt,init) \ 2280#define array_needsize(type,base,cur,cnt,init) \
662 if (expect_false ((cnt) > (cur))) \ 2281 if (ecb_expect_false ((cnt) > (cur))) \
663 { \ 2282 { \
664 int ocur_ = (cur); \ 2283 ecb_unused int ocur_ = (cur); \
665 (base) = (type *)array_realloc \ 2284 (base) = (type *)array_realloc \
666 (sizeof (type), (base), &(cur), (cnt)); \ 2285 (sizeof (type), (base), &(cur), (cnt)); \
667 init ((base) + (ocur_), (cur) - ocur_); \ 2286 init ((base), ocur_, ((cur) - ocur_)); \
668 } 2287 }
669 2288
670#if 0 2289#if 0
671#define array_slim(type,stem) \ 2290#define array_slim(type,stem) \
672 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
680#define array_free(stem, idx) \ 2299#define array_free(stem, idx) \
681 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2300 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682 2301
683/*****************************************************************************/ 2302/*****************************************************************************/
684 2303
685void noinline 2304/* dummy callback for pending events */
2305ecb_noinline
2306static void
2307pendingcb (EV_P_ ev_prepare *w, int revents)
2308{
2309}
2310
2311ecb_noinline
2312void
686ev_feed_event (EV_P_ void *w, int revents) 2313ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
687{ 2314{
688 W w_ = (W)w; 2315 W w_ = (W)w;
689 int pri = ABSPRI (w_); 2316 int pri = ABSPRI (w_);
690 2317
691 if (expect_false (w_->pending)) 2318 if (ecb_expect_false (w_->pending))
692 pendings [pri][w_->pending - 1].events |= revents; 2319 pendings [pri][w_->pending - 1].events |= revents;
693 else 2320 else
694 { 2321 {
695 w_->pending = ++pendingcnt [pri]; 2322 w_->pending = ++pendingcnt [pri];
696 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2323 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
697 pendings [pri][w_->pending - 1].w = w_; 2324 pendings [pri][w_->pending - 1].w = w_;
698 pendings [pri][w_->pending - 1].events = revents; 2325 pendings [pri][w_->pending - 1].events = revents;
699 } 2326 }
2327
2328 pendingpri = NUMPRI - 1;
700} 2329}
701 2330
702inline_speed void 2331inline_speed void
703feed_reverse (EV_P_ W w) 2332feed_reverse (EV_P_ W w)
704{ 2333{
705 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2334 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
706 rfeeds [rfeedcnt++] = w; 2335 rfeeds [rfeedcnt++] = w;
707} 2336}
708 2337
709inline_size void 2338inline_size void
710feed_reverse_done (EV_P_ int revents) 2339feed_reverse_done (EV_P_ int revents)
… …
724} 2353}
725 2354
726/*****************************************************************************/ 2355/*****************************************************************************/
727 2356
728inline_speed void 2357inline_speed void
729fd_event (EV_P_ int fd, int revents) 2358fd_event_nocheck (EV_P_ int fd, int revents)
730{ 2359{
731 ANFD *anfd = anfds + fd; 2360 ANFD *anfd = anfds + fd;
732 ev_io *w; 2361 ev_io *w;
733 2362
734 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2363 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
738 if (ev) 2367 if (ev)
739 ev_feed_event (EV_A_ (W)w, ev); 2368 ev_feed_event (EV_A_ (W)w, ev);
740 } 2369 }
741} 2370}
742 2371
2372/* do not submit kernel events for fds that have reify set */
2373/* because that means they changed while we were polling for new events */
2374inline_speed void
2375fd_event (EV_P_ int fd, int revents)
2376{
2377 ANFD *anfd = anfds + fd;
2378
2379 if (ecb_expect_true (!anfd->reify))
2380 fd_event_nocheck (EV_A_ fd, revents);
2381}
2382
743void 2383void
744ev_feed_fd_event (EV_P_ int fd, int revents) 2384ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
745{ 2385{
746 if (fd >= 0 && fd < anfdmax) 2386 if (fd >= 0 && fd < anfdmax)
747 fd_event (EV_A_ fd, revents); 2387 fd_event_nocheck (EV_A_ fd, revents);
748} 2388}
749 2389
2390/* make sure the external fd watch events are in-sync */
2391/* with the kernel/libev internal state */
750inline_size void 2392inline_size void
751fd_reify (EV_P) 2393fd_reify (EV_P)
752{ 2394{
753 int i; 2395 int i;
754 2396
2397 /* most backends do not modify the fdchanges list in backend_modfiy.
2398 * except io_uring, which has fixed-size buffers which might force us
2399 * to handle events in backend_modify, causing fdchanges to be amended,
2400 * which could result in an endless loop.
2401 * to avoid this, we do not dynamically handle fds that were added
2402 * during fd_reify. that means that for those backends, fdchangecnt
2403 * might be non-zero during poll, which must cause them to not block.
2404 * to not put too much of a burden on other backends, this detail
2405 * needs to be handled in the backend.
2406 */
2407 int changecnt = fdchangecnt;
2408
2409#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
755 for (i = 0; i < fdchangecnt; ++i) 2410 for (i = 0; i < changecnt; ++i)
2411 {
2412 int fd = fdchanges [i];
2413 ANFD *anfd = anfds + fd;
2414
2415 if (anfd->reify & EV__IOFDSET && anfd->head)
2416 {
2417 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2418
2419 if (handle != anfd->handle)
2420 {
2421 unsigned long arg;
2422
2423 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2424
2425 /* handle changed, but fd didn't - we need to do it in two steps */
2426 backend_modify (EV_A_ fd, anfd->events, 0);
2427 anfd->events = 0;
2428 anfd->handle = handle;
2429 }
2430 }
2431 }
2432#endif
2433
2434 for (i = 0; i < changecnt; ++i)
756 { 2435 {
757 int fd = fdchanges [i]; 2436 int fd = fdchanges [i];
758 ANFD *anfd = anfds + fd; 2437 ANFD *anfd = anfds + fd;
759 ev_io *w; 2438 ev_io *w;
760 2439
761 unsigned char events = 0; 2440 unsigned char o_events = anfd->events;
2441 unsigned char o_reify = anfd->reify;
762 2442
763 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2443 anfd->reify = 0;
764 events |= (unsigned char)w->events;
765 2444
766#if EV_SELECT_IS_WINSOCKET 2445 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
767 if (events)
768 { 2446 {
769 unsigned long arg; 2447 anfd->events = 0;
770 #ifdef EV_FD_TO_WIN32_HANDLE 2448
771 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2449 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
772 #else 2450 anfd->events |= (unsigned char)w->events;
773 anfd->handle = _get_osfhandle (fd); 2451
774 #endif 2452 if (o_events != anfd->events)
775 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 2453 o_reify = EV__IOFDSET; /* actually |= */
776 } 2454 }
777#endif
778 2455
779 { 2456 if (o_reify & EV__IOFDSET)
780 unsigned char o_events = anfd->events;
781 unsigned char o_reify = anfd->reify;
782
783 anfd->reify = 0;
784 anfd->events = events;
785
786 if (o_events != events || o_reify & EV__IOFDSET)
787 backend_modify (EV_A_ fd, o_events, events); 2457 backend_modify (EV_A_ fd, o_events, anfd->events);
788 } 2458 }
789 }
790 2459
2460 /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added.
2461 * this is a rare case (see beginning comment in this function), so we copy them to the
2462 * front and hope the backend handles this case.
2463 */
2464 if (ecb_expect_false (fdchangecnt != changecnt))
2465 memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges));
2466
791 fdchangecnt = 0; 2467 fdchangecnt -= changecnt;
792} 2468}
793 2469
2470/* something about the given fd changed */
794inline_size void 2471inline_size
2472void
795fd_change (EV_P_ int fd, int flags) 2473fd_change (EV_P_ int fd, int flags)
796{ 2474{
797 unsigned char reify = anfds [fd].reify; 2475 unsigned char reify = anfds [fd].reify;
798 anfds [fd].reify |= flags; 2476 anfds [fd].reify = reify | flags;
799 2477
800 if (expect_true (!reify)) 2478 if (ecb_expect_true (!reify))
801 { 2479 {
802 ++fdchangecnt; 2480 ++fdchangecnt;
803 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2481 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
804 fdchanges [fdchangecnt - 1] = fd; 2482 fdchanges [fdchangecnt - 1] = fd;
805 } 2483 }
806} 2484}
807 2485
2486/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
808inline_speed void 2487inline_speed ecb_cold void
809fd_kill (EV_P_ int fd) 2488fd_kill (EV_P_ int fd)
810{ 2489{
811 ev_io *w; 2490 ev_io *w;
812 2491
813 while ((w = (ev_io *)anfds [fd].head)) 2492 while ((w = (ev_io *)anfds [fd].head))
… …
815 ev_io_stop (EV_A_ w); 2494 ev_io_stop (EV_A_ w);
816 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2495 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
817 } 2496 }
818} 2497}
819 2498
2499/* check whether the given fd is actually valid, for error recovery */
820inline_size int 2500inline_size ecb_cold int
821fd_valid (int fd) 2501fd_valid (int fd)
822{ 2502{
823#ifdef _WIN32 2503#ifdef _WIN32
824 return _get_osfhandle (fd) != -1; 2504 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
825#else 2505#else
826 return fcntl (fd, F_GETFD) != -1; 2506 return fcntl (fd, F_GETFD) != -1;
827#endif 2507#endif
828} 2508}
829 2509
830/* called on EBADF to verify fds */ 2510/* called on EBADF to verify fds */
831static void noinline 2511ecb_noinline ecb_cold
2512static void
832fd_ebadf (EV_P) 2513fd_ebadf (EV_P)
833{ 2514{
834 int fd; 2515 int fd;
835 2516
836 for (fd = 0; fd < anfdmax; ++fd) 2517 for (fd = 0; fd < anfdmax; ++fd)
… …
838 if (!fd_valid (fd) && errno == EBADF) 2519 if (!fd_valid (fd) && errno == EBADF)
839 fd_kill (EV_A_ fd); 2520 fd_kill (EV_A_ fd);
840} 2521}
841 2522
842/* called on ENOMEM in select/poll to kill some fds and retry */ 2523/* called on ENOMEM in select/poll to kill some fds and retry */
843static void noinline 2524ecb_noinline ecb_cold
2525static void
844fd_enomem (EV_P) 2526fd_enomem (EV_P)
845{ 2527{
846 int fd; 2528 int fd;
847 2529
848 for (fd = anfdmax; fd--; ) 2530 for (fd = anfdmax; fd--; )
849 if (anfds [fd].events) 2531 if (anfds [fd].events)
850 { 2532 {
851 fd_kill (EV_A_ fd); 2533 fd_kill (EV_A_ fd);
852 return; 2534 break;
853 } 2535 }
854} 2536}
855 2537
856/* usually called after fork if backend needs to re-arm all fds from scratch */ 2538/* usually called after fork if backend needs to re-arm all fds from scratch */
857static void noinline 2539ecb_noinline
2540static void
858fd_rearm_all (EV_P) 2541fd_rearm_all (EV_P)
859{ 2542{
860 int fd; 2543 int fd;
861 2544
862 for (fd = 0; fd < anfdmax; ++fd) 2545 for (fd = 0; fd < anfdmax; ++fd)
863 if (anfds [fd].events) 2546 if (anfds [fd].events)
864 { 2547 {
865 anfds [fd].events = 0; 2548 anfds [fd].events = 0;
866 anfds [fd].emask = 0; 2549 anfds [fd].emask = 0;
867 fd_change (EV_A_ fd, EV__IOFDSET | 1); 2550 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
868 } 2551 }
869} 2552}
870 2553
2554/* used to prepare libev internal fd's */
2555/* this is not fork-safe */
2556inline_speed void
2557fd_intern (int fd)
2558{
2559#ifdef _WIN32
2560 unsigned long arg = 1;
2561 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2562#else
2563 fcntl (fd, F_SETFD, FD_CLOEXEC);
2564 fcntl (fd, F_SETFL, O_NONBLOCK);
2565#endif
2566}
2567
871/*****************************************************************************/ 2568/*****************************************************************************/
872 2569
873/* 2570/*
874 * the heap functions want a real array index. array index 0 uis guaranteed to not 2571 * the heap functions want a real array index. array index 0 is guaranteed to not
875 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 2572 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
876 * the branching factor of the d-tree. 2573 * the branching factor of the d-tree.
877 */ 2574 */
878 2575
879/* 2576/*
… …
901 ev_tstamp minat; 2598 ev_tstamp minat;
902 ANHE *minpos; 2599 ANHE *minpos;
903 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2600 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
904 2601
905 /* find minimum child */ 2602 /* find minimum child */
906 if (expect_true (pos + DHEAP - 1 < E)) 2603 if (ecb_expect_true (pos + DHEAP - 1 < E))
907 { 2604 {
908 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2605 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
909 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2606 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
910 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2607 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
911 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2608 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
912 } 2609 }
913 else if (pos < E) 2610 else if (pos < E)
914 { 2611 {
915 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2612 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
916 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2613 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
917 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2614 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
918 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2615 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
919 } 2616 }
920 else 2617 else
921 break; 2618 break;
922 2619
923 if (ANHE_at (he) <= minat) 2620 if (ANHE_at (he) <= minat)
… …
931 2628
932 heap [k] = he; 2629 heap [k] = he;
933 ev_active (ANHE_w (he)) = k; 2630 ev_active (ANHE_w (he)) = k;
934} 2631}
935 2632
936#else /* 4HEAP */ 2633#else /* not 4HEAP */
937 2634
938#define HEAP0 1 2635#define HEAP0 1
939#define HPARENT(k) ((k) >> 1) 2636#define HPARENT(k) ((k) >> 1)
940#define UPHEAP_DONE(p,k) (!(p)) 2637#define UPHEAP_DONE(p,k) (!(p))
941 2638
… …
947 2644
948 for (;;) 2645 for (;;)
949 { 2646 {
950 int c = k << 1; 2647 int c = k << 1;
951 2648
952 if (c > N + HEAP0 - 1) 2649 if (c >= N + HEAP0)
953 break; 2650 break;
954 2651
955 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 2652 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
956 ? 1 : 0; 2653 ? 1 : 0;
957 2654
… …
989 2686
990 heap [k] = he; 2687 heap [k] = he;
991 ev_active (ANHE_w (he)) = k; 2688 ev_active (ANHE_w (he)) = k;
992} 2689}
993 2690
2691/* move an element suitably so it is in a correct place */
994inline_size void 2692inline_size void
995adjustheap (ANHE *heap, int N, int k) 2693adjustheap (ANHE *heap, int N, int k)
996{ 2694{
997 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 2695 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
998 upheap (heap, k); 2696 upheap (heap, k);
999 else 2697 else
1000 downheap (heap, N, k); 2698 downheap (heap, N, k);
1001} 2699}
1002 2700
… …
1012 upheap (heap, i + HEAP0); 2710 upheap (heap, i + HEAP0);
1013} 2711}
1014 2712
1015/*****************************************************************************/ 2713/*****************************************************************************/
1016 2714
2715/* associate signal watchers to a signal */
1017typedef struct 2716typedef struct
1018{ 2717{
2718 EV_ATOMIC_T pending;
2719#if EV_MULTIPLICITY
2720 EV_P;
2721#endif
1019 WL head; 2722 WL head;
1020 EV_ATOMIC_T gotsig;
1021} ANSIG; 2723} ANSIG;
1022 2724
1023static ANSIG *signals; 2725static ANSIG signals [EV_NSIG - 1];
1024static int signalmax;
1025
1026static EV_ATOMIC_T gotsig;
1027 2726
1028/*****************************************************************************/ 2727/*****************************************************************************/
1029 2728
2729#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2730
2731ecb_noinline ecb_cold
2732static void
2733evpipe_init (EV_P)
2734{
2735 if (!ev_is_active (&pipe_w))
2736 {
2737 int fds [2];
2738
2739# if EV_USE_EVENTFD
2740 fds [0] = -1;
2741 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2742 if (fds [1] < 0 && errno == EINVAL)
2743 fds [1] = eventfd (0, 0);
2744
2745 if (fds [1] < 0)
2746# endif
2747 {
2748 while (pipe (fds))
2749 ev_syserr ("(libev) error creating signal/async pipe");
2750
2751 fd_intern (fds [0]);
2752 }
2753
2754 evpipe [0] = fds [0];
2755
2756 if (evpipe [1] < 0)
2757 evpipe [1] = fds [1]; /* first call, set write fd */
2758 else
2759 {
2760 /* on subsequent calls, do not change evpipe [1] */
2761 /* so that evpipe_write can always rely on its value. */
2762 /* this branch does not do anything sensible on windows, */
2763 /* so must not be executed on windows */
2764
2765 dup2 (fds [1], evpipe [1]);
2766 close (fds [1]);
2767 }
2768
2769 fd_intern (evpipe [1]);
2770
2771 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2772 ev_io_start (EV_A_ &pipe_w);
2773 ev_unref (EV_A); /* watcher should not keep loop alive */
2774 }
2775}
2776
1030inline_speed void 2777inline_speed void
1031fd_intern (int fd) 2778evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1032{ 2779{
1033#ifdef _WIN32 2780 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1034 unsigned long arg = 1;
1035 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1036#else
1037 fcntl (fd, F_SETFD, FD_CLOEXEC);
1038 fcntl (fd, F_SETFL, O_NONBLOCK);
1039#endif
1040}
1041 2781
1042static void noinline 2782 if (ecb_expect_true (*flag))
1043evpipe_init (EV_P) 2783 return;
1044{ 2784
1045 if (!ev_is_active (&pipeev)) 2785 *flag = 1;
2786 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2787
2788 pipe_write_skipped = 1;
2789
2790 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2791
2792 if (pipe_write_wanted)
1046 { 2793 {
2794 int old_errno;
2795
2796 pipe_write_skipped = 0;
2797 ECB_MEMORY_FENCE_RELEASE;
2798
2799 old_errno = errno; /* save errno because write will clobber it */
2800
1047#if EV_USE_EVENTFD 2801#if EV_USE_EVENTFD
1048 if ((evfd = eventfd (0, 0)) >= 0) 2802 if (evpipe [0] < 0)
1049 { 2803 {
1050 evpipe [0] = -1; 2804 uint64_t counter = 1;
1051 fd_intern (evfd); 2805 write (evpipe [1], &counter, sizeof (uint64_t));
1052 ev_io_set (&pipeev, evfd, EV_READ);
1053 } 2806 }
1054 else 2807 else
1055#endif 2808#endif
1056 { 2809 {
1057 while (pipe (evpipe)) 2810#ifdef _WIN32
1058 ev_syserr ("(libev) error creating signal/async pipe"); 2811 WSABUF buf;
1059 2812 DWORD sent;
1060 fd_intern (evpipe [0]); 2813 buf.buf = (char *)&buf;
1061 fd_intern (evpipe [1]); 2814 buf.len = 1;
1062 ev_io_set (&pipeev, evpipe [0], EV_READ); 2815 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2816#else
2817 write (evpipe [1], &(evpipe [1]), 1);
2818#endif
1063 } 2819 }
1064 2820
1065 ev_io_start (EV_A_ &pipeev); 2821 errno = old_errno;
1066 ev_unref (EV_A); /* watcher should not keep loop alive */
1067 }
1068}
1069
1070inline_size void
1071evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1072{
1073 if (!*flag)
1074 { 2822 }
1075 int old_errno = errno; /* save errno because write might clobber it */ 2823}
1076 2824
1077 *flag = 1; 2825/* called whenever the libev signal pipe */
2826/* got some events (signal, async) */
2827static void
2828pipecb (EV_P_ ev_io *iow, int revents)
2829{
2830 int i;
1078 2831
2832 if (revents & EV_READ)
2833 {
1079#if EV_USE_EVENTFD 2834#if EV_USE_EVENTFD
1080 if (evfd >= 0) 2835 if (evpipe [0] < 0)
1081 { 2836 {
1082 uint64_t counter = 1; 2837 uint64_t counter;
1083 write (evfd, &counter, sizeof (uint64_t)); 2838 read (evpipe [1], &counter, sizeof (uint64_t));
1084 } 2839 }
1085 else 2840 else
1086#endif 2841#endif
1087 write (evpipe [1], &old_errno, 1); 2842 {
1088
1089 errno = old_errno;
1090 }
1091}
1092
1093static void
1094pipecb (EV_P_ ev_io *iow, int revents)
1095{
1096#if EV_USE_EVENTFD
1097 if (evfd >= 0)
1098 {
1099 uint64_t counter;
1100 read (evfd, &counter, sizeof (uint64_t));
1101 }
1102 else
1103#endif
1104 {
1105 char dummy; 2843 char dummy[4];
2844#ifdef _WIN32
2845 WSABUF buf;
2846 DWORD recvd;
2847 DWORD flags = 0;
2848 buf.buf = dummy;
2849 buf.len = sizeof (dummy);
2850 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2851#else
1106 read (evpipe [0], &dummy, 1); 2852 read (evpipe [0], &dummy, sizeof (dummy));
2853#endif
2854 }
2855 }
2856
2857 pipe_write_skipped = 0;
2858
2859 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2860
2861#if EV_SIGNAL_ENABLE
2862 if (sig_pending)
1107 } 2863 {
2864 sig_pending = 0;
1108 2865
1109 if (gotsig && ev_is_default_loop (EV_A)) 2866 ECB_MEMORY_FENCE;
1110 {
1111 int signum;
1112 gotsig = 0;
1113 2867
1114 for (signum = signalmax; signum--; ) 2868 for (i = EV_NSIG - 1; i--; )
1115 if (signals [signum].gotsig) 2869 if (ecb_expect_false (signals [i].pending))
1116 ev_feed_signal_event (EV_A_ signum + 1); 2870 ev_feed_signal_event (EV_A_ i + 1);
1117 } 2871 }
2872#endif
1118 2873
1119#if EV_ASYNC_ENABLE 2874#if EV_ASYNC_ENABLE
1120 if (gotasync) 2875 if (async_pending)
1121 { 2876 {
1122 int i; 2877 async_pending = 0;
1123 gotasync = 0; 2878
2879 ECB_MEMORY_FENCE;
1124 2880
1125 for (i = asynccnt; i--; ) 2881 for (i = asynccnt; i--; )
1126 if (asyncs [i]->sent) 2882 if (asyncs [i]->sent)
1127 { 2883 {
1128 asyncs [i]->sent = 0; 2884 asyncs [i]->sent = 0;
2885 ECB_MEMORY_FENCE_RELEASE;
1129 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2886 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1130 } 2887 }
1131 } 2888 }
1132#endif 2889#endif
1133} 2890}
1134 2891
1135/*****************************************************************************/ 2892/*****************************************************************************/
1136 2893
2894void
2895ev_feed_signal (int signum) EV_NOEXCEPT
2896{
2897#if EV_MULTIPLICITY
2898 EV_P;
2899 ECB_MEMORY_FENCE_ACQUIRE;
2900 EV_A = signals [signum - 1].loop;
2901
2902 if (!EV_A)
2903 return;
2904#endif
2905
2906 signals [signum - 1].pending = 1;
2907 evpipe_write (EV_A_ &sig_pending);
2908}
2909
1137static void 2910static void
1138ev_sighandler (int signum) 2911ev_sighandler (int signum)
1139{ 2912{
2913#ifdef _WIN32
2914 signal (signum, ev_sighandler);
2915#endif
2916
2917 ev_feed_signal (signum);
2918}
2919
2920ecb_noinline
2921void
2922ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
2923{
2924 WL w;
2925
2926 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
2927 return;
2928
2929 --signum;
2930
1140#if EV_MULTIPLICITY 2931#if EV_MULTIPLICITY
1141 struct ev_loop *loop = &default_loop_struct; 2932 /* it is permissible to try to feed a signal to the wrong loop */
1142#endif 2933 /* or, likely more useful, feeding a signal nobody is waiting for */
1143 2934
1144#if _WIN32 2935 if (ecb_expect_false (signals [signum].loop != EV_A))
1145 signal (signum, ev_sighandler);
1146#endif
1147
1148 signals [signum - 1].gotsig = 1;
1149 evpipe_write (EV_A_ &gotsig);
1150}
1151
1152void noinline
1153ev_feed_signal_event (EV_P_ int signum)
1154{
1155 WL w;
1156
1157#if EV_MULTIPLICITY
1158 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1159#endif
1160
1161 --signum;
1162
1163 if (signum < 0 || signum >= signalmax)
1164 return; 2936 return;
2937#endif
1165 2938
1166 signals [signum].gotsig = 0; 2939 signals [signum].pending = 0;
2940 ECB_MEMORY_FENCE_RELEASE;
1167 2941
1168 for (w = signals [signum].head; w; w = w->next) 2942 for (w = signals [signum].head; w; w = w->next)
1169 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2943 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1170} 2944}
1171 2945
2946#if EV_USE_SIGNALFD
2947static void
2948sigfdcb (EV_P_ ev_io *iow, int revents)
2949{
2950 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2951
2952 for (;;)
2953 {
2954 ssize_t res = read (sigfd, si, sizeof (si));
2955
2956 /* not ISO-C, as res might be -1, but works with SuS */
2957 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2958 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2959
2960 if (res < (ssize_t)sizeof (si))
2961 break;
2962 }
2963}
2964#endif
2965
2966#endif
2967
1172/*****************************************************************************/ 2968/*****************************************************************************/
1173 2969
2970#if EV_CHILD_ENABLE
1174static WL childs [EV_PID_HASHSIZE]; 2971static WL childs [EV_PID_HASHSIZE];
1175
1176#ifndef _WIN32
1177 2972
1178static ev_signal childev; 2973static ev_signal childev;
1179 2974
1180#ifndef WIFCONTINUED 2975#ifndef WIFCONTINUED
1181# define WIFCONTINUED(status) 0 2976# define WIFCONTINUED(status) 0
1182#endif 2977#endif
1183 2978
2979/* handle a single child status event */
1184inline_speed void 2980inline_speed void
1185child_reap (EV_P_ int chain, int pid, int status) 2981child_reap (EV_P_ int chain, int pid, int status)
1186{ 2982{
1187 ev_child *w; 2983 ev_child *w;
1188 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2984 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1189 2985
1190 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2986 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1191 { 2987 {
1192 if ((w->pid == pid || !w->pid) 2988 if ((w->pid == pid || !w->pid)
1193 && (!traced || (w->flags & 1))) 2989 && (!traced || (w->flags & 1)))
1194 { 2990 {
1195 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2991 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1202 2998
1203#ifndef WCONTINUED 2999#ifndef WCONTINUED
1204# define WCONTINUED 0 3000# define WCONTINUED 0
1205#endif 3001#endif
1206 3002
3003/* called on sigchld etc., calls waitpid */
1207static void 3004static void
1208childcb (EV_P_ ev_signal *sw, int revents) 3005childcb (EV_P_ ev_signal *sw, int revents)
1209{ 3006{
1210 int pid, status; 3007 int pid, status;
1211 3008
… …
1219 /* make sure we are called again until all children have been reaped */ 3016 /* make sure we are called again until all children have been reaped */
1220 /* we need to do it this way so that the callback gets called before we continue */ 3017 /* we need to do it this way so that the callback gets called before we continue */
1221 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 3018 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1222 3019
1223 child_reap (EV_A_ pid, pid, status); 3020 child_reap (EV_A_ pid, pid, status);
1224 if (EV_PID_HASHSIZE > 1) 3021 if ((EV_PID_HASHSIZE) > 1)
1225 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 3022 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1226} 3023}
1227 3024
1228#endif 3025#endif
1229 3026
1230/*****************************************************************************/ 3027/*****************************************************************************/
1231 3028
3029#if EV_USE_TIMERFD
3030
3031static void periodics_reschedule (EV_P);
3032
3033static void
3034timerfdcb (EV_P_ ev_io *iow, int revents)
3035{
3036 struct itimerspec its = { 0 };
3037
3038 its.it_value.tv_sec = ev_rt_now + (int)MAX_BLOCKTIME2;
3039 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0);
3040
3041 ev_rt_now = ev_time ();
3042 /* periodics_reschedule only needs ev_rt_now */
3043 /* but maybe in the future we want the full treatment. */
3044 /*
3045 now_floor = EV_TS_CONST (0.);
3046 time_update (EV_A_ EV_TSTAMP_HUGE);
3047 */
3048#if EV_PERIODIC_ENABLE
3049 periodics_reschedule (EV_A);
3050#endif
3051}
3052
3053ecb_noinline ecb_cold
3054static void
3055evtimerfd_init (EV_P)
3056{
3057 if (!ev_is_active (&timerfd_w))
3058 {
3059 timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
3060
3061 if (timerfd >= 0)
3062 {
3063 fd_intern (timerfd); /* just to be sure */
3064
3065 ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ);
3066 ev_set_priority (&timerfd_w, EV_MINPRI);
3067 ev_io_start (EV_A_ &timerfd_w);
3068 ev_unref (EV_A); /* watcher should not keep loop alive */
3069
3070 /* (re-) arm timer */
3071 timerfdcb (EV_A_ 0, 0);
3072 }
3073 }
3074}
3075
3076#endif
3077
3078/*****************************************************************************/
3079
3080#if EV_USE_IOCP
3081# include "ev_iocp.c"
3082#endif
1232#if EV_USE_PORT 3083#if EV_USE_PORT
1233# include "ev_port.c" 3084# include "ev_port.c"
1234#endif 3085#endif
1235#if EV_USE_KQUEUE 3086#if EV_USE_KQUEUE
1236# include "ev_kqueue.c" 3087# include "ev_kqueue.c"
1237#endif 3088#endif
1238#if EV_USE_EPOLL 3089#if EV_USE_EPOLL
1239# include "ev_epoll.c" 3090# include "ev_epoll.c"
1240#endif 3091#endif
3092#if EV_USE_LINUXAIO
3093# include "ev_linuxaio.c"
3094#endif
3095#if EV_USE_IOURING
3096# include "ev_iouring.c"
3097#endif
1241#if EV_USE_POLL 3098#if EV_USE_POLL
1242# include "ev_poll.c" 3099# include "ev_poll.c"
1243#endif 3100#endif
1244#if EV_USE_SELECT 3101#if EV_USE_SELECT
1245# include "ev_select.c" 3102# include "ev_select.c"
1246#endif 3103#endif
1247 3104
1248int 3105ecb_cold int
1249ev_version_major (void) 3106ev_version_major (void) EV_NOEXCEPT
1250{ 3107{
1251 return EV_VERSION_MAJOR; 3108 return EV_VERSION_MAJOR;
1252} 3109}
1253 3110
1254int 3111ecb_cold int
1255ev_version_minor (void) 3112ev_version_minor (void) EV_NOEXCEPT
1256{ 3113{
1257 return EV_VERSION_MINOR; 3114 return EV_VERSION_MINOR;
1258} 3115}
1259 3116
1260/* return true if we are running with elevated privileges and should ignore env variables */ 3117/* return true if we are running with elevated privileges and should ignore env variables */
1261int inline_size 3118inline_size ecb_cold int
1262enable_secure (void) 3119enable_secure (void)
1263{ 3120{
1264#ifdef _WIN32 3121#ifdef _WIN32
1265 return 0; 3122 return 0;
1266#else 3123#else
1267 return getuid () != geteuid () 3124 return getuid () != geteuid ()
1268 || getgid () != getegid (); 3125 || getgid () != getegid ();
1269#endif 3126#endif
1270} 3127}
1271 3128
3129ecb_cold
1272unsigned int 3130unsigned int
1273ev_supported_backends (void) 3131ev_supported_backends (void) EV_NOEXCEPT
1274{ 3132{
1275 unsigned int flags = 0; 3133 unsigned int flags = 0;
1276 3134
1277 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3135 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1278 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 3136 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1279 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3137 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1280 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3138 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
1281 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 3139 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
1282 3140 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3141 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3142
1283 return flags; 3143 return flags;
1284} 3144}
1285 3145
3146ecb_cold
1286unsigned int 3147unsigned int
1287ev_recommended_backends (void) 3148ev_recommended_backends (void) EV_NOEXCEPT
1288{ 3149{
1289 unsigned int flags = ev_supported_backends (); 3150 unsigned int flags = ev_supported_backends ();
1290 3151
1291#ifndef __NetBSD__ 3152#ifndef __NetBSD__
1292 /* kqueue is borked on everything but netbsd apparently */ 3153 /* kqueue is borked on everything but netbsd apparently */
… …
1296#ifdef __APPLE__ 3157#ifdef __APPLE__
1297 /* only select works correctly on that "unix-certified" platform */ 3158 /* only select works correctly on that "unix-certified" platform */
1298 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 3159 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1299 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 3160 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1300#endif 3161#endif
3162#ifdef __FreeBSD__
3163 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
3164#endif
3165
3166 /* TODO: linuxaio is very experimental */
3167#if !EV_RECOMMEND_LINUXAIO
3168 flags &= ~EVBACKEND_LINUXAIO;
3169#endif
3170 /* TODO: linuxaio is super experimental */
3171#if !EV_RECOMMEND_IOURING
3172 flags &= ~EVBACKEND_IOURING;
3173#endif
1301 3174
1302 return flags; 3175 return flags;
1303} 3176}
1304 3177
3178ecb_cold
1305unsigned int 3179unsigned int
1306ev_embeddable_backends (void) 3180ev_embeddable_backends (void) EV_NOEXCEPT
1307{ 3181{
1308 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3182 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
1309 3183
1310 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 3184 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1311 /* please fix it and tell me how to detect the fix */ 3185 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1312 flags &= ~EVBACKEND_EPOLL; 3186 flags &= ~EVBACKEND_EPOLL;
3187
3188 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
1313 3189
1314 return flags; 3190 return flags;
1315} 3191}
1316 3192
1317unsigned int 3193unsigned int
1318ev_backend (EV_P) 3194ev_backend (EV_P) EV_NOEXCEPT
1319{ 3195{
1320 return backend; 3196 return backend;
1321} 3197}
1322 3198
3199#if EV_FEATURE_API
1323unsigned int 3200unsigned int
1324ev_loop_count (EV_P) 3201ev_iteration (EV_P) EV_NOEXCEPT
1325{ 3202{
1326 return loop_count; 3203 return loop_count;
1327} 3204}
1328 3205
3206unsigned int
3207ev_depth (EV_P) EV_NOEXCEPT
3208{
3209 return loop_depth;
3210}
3211
1329void 3212void
1330ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 3213ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1331{ 3214{
1332 io_blocktime = interval; 3215 io_blocktime = interval;
1333} 3216}
1334 3217
1335void 3218void
1336ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 3219ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1337{ 3220{
1338 timeout_blocktime = interval; 3221 timeout_blocktime = interval;
1339} 3222}
1340 3223
1341static void noinline 3224void
3225ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
3226{
3227 userdata = data;
3228}
3229
3230void *
3231ev_userdata (EV_P) EV_NOEXCEPT
3232{
3233 return userdata;
3234}
3235
3236void
3237ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
3238{
3239 invoke_cb = invoke_pending_cb;
3240}
3241
3242void
3243ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
3244{
3245 release_cb = release;
3246 acquire_cb = acquire;
3247}
3248#endif
3249
3250/* initialise a loop structure, must be zero-initialised */
3251ecb_noinline ecb_cold
3252static void
1342loop_init (EV_P_ unsigned int flags) 3253loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1343{ 3254{
1344 if (!backend) 3255 if (!backend)
1345 { 3256 {
3257 origflags = flags;
3258
1346#if EV_USE_REALTIME 3259#if EV_USE_REALTIME
1347 if (!have_realtime) 3260 if (!have_realtime)
1348 { 3261 {
1349 struct timespec ts; 3262 struct timespec ts;
1350 3263
… …
1361 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3274 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1362 have_monotonic = 1; 3275 have_monotonic = 1;
1363 } 3276 }
1364#endif 3277#endif
1365 3278
1366 ev_rt_now = ev_time ();
1367 mn_now = get_clock ();
1368 now_floor = mn_now;
1369 rtmn_diff = ev_rt_now - mn_now;
1370
1371 io_blocktime = 0.;
1372 timeout_blocktime = 0.;
1373 backend = 0;
1374 backend_fd = -1;
1375 gotasync = 0;
1376#if EV_USE_INOTIFY
1377 fs_fd = -2;
1378#endif
1379
1380 /* pid check not overridable via env */ 3279 /* pid check not overridable via env */
1381#ifndef _WIN32 3280#ifndef _WIN32
1382 if (flags & EVFLAG_FORKCHECK) 3281 if (flags & EVFLAG_FORKCHECK)
1383 curpid = getpid (); 3282 curpid = getpid ();
1384#endif 3283#endif
… …
1386 if (!(flags & EVFLAG_NOENV) 3285 if (!(flags & EVFLAG_NOENV)
1387 && !enable_secure () 3286 && !enable_secure ()
1388 && getenv ("LIBEV_FLAGS")) 3287 && getenv ("LIBEV_FLAGS"))
1389 flags = atoi (getenv ("LIBEV_FLAGS")); 3288 flags = atoi (getenv ("LIBEV_FLAGS"));
1390 3289
1391 if (!(flags & 0x0000ffffU)) 3290 ev_rt_now = ev_time ();
3291 mn_now = get_clock ();
3292 now_floor = mn_now;
3293 rtmn_diff = ev_rt_now - mn_now;
3294#if EV_FEATURE_API
3295 invoke_cb = ev_invoke_pending;
3296#endif
3297
3298 io_blocktime = 0.;
3299 timeout_blocktime = 0.;
3300 backend = 0;
3301 backend_fd = -1;
3302 sig_pending = 0;
3303#if EV_ASYNC_ENABLE
3304 async_pending = 0;
3305#endif
3306 pipe_write_skipped = 0;
3307 pipe_write_wanted = 0;
3308 evpipe [0] = -1;
3309 evpipe [1] = -1;
3310#if EV_USE_INOTIFY
3311 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
3312#endif
3313#if EV_USE_SIGNALFD
3314 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3315#endif
3316#if EV_USE_TIMERFD
3317 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3318#endif
3319
3320 if (!(flags & EVBACKEND_MASK))
1392 flags |= ev_recommended_backends (); 3321 flags |= ev_recommended_backends ();
1393 3322
3323#if EV_USE_IOCP
3324 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3325#endif
1394#if EV_USE_PORT 3326#if EV_USE_PORT
1395 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3327 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1396#endif 3328#endif
1397#if EV_USE_KQUEUE 3329#if EV_USE_KQUEUE
1398 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3330 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3331#endif
3332#if EV_USE_IOURING
3333 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3334#endif
3335#if EV_USE_LINUXAIO
3336 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1399#endif 3337#endif
1400#if EV_USE_EPOLL 3338#if EV_USE_EPOLL
1401 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3339 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1402#endif 3340#endif
1403#if EV_USE_POLL 3341#if EV_USE_POLL
1404 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3342 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1405#endif 3343#endif
1406#if EV_USE_SELECT 3344#if EV_USE_SELECT
1407 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3345 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1408#endif 3346#endif
1409 3347
3348 ev_prepare_init (&pending_w, pendingcb);
3349
3350#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1410 ev_init (&pipeev, pipecb); 3351 ev_init (&pipe_w, pipecb);
1411 ev_set_priority (&pipeev, EV_MAXPRI); 3352 ev_set_priority (&pipe_w, EV_MAXPRI);
3353#endif
1412 } 3354 }
1413} 3355}
1414 3356
1415static void noinline 3357/* free up a loop structure */
3358ecb_cold
3359void
1416loop_destroy (EV_P) 3360ev_loop_destroy (EV_P)
1417{ 3361{
1418 int i; 3362 int i;
1419 3363
3364#if EV_MULTIPLICITY
3365 /* mimic free (0) */
3366 if (!EV_A)
3367 return;
3368#endif
3369
3370#if EV_CLEANUP_ENABLE
3371 /* queue cleanup watchers (and execute them) */
3372 if (ecb_expect_false (cleanupcnt))
3373 {
3374 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3375 EV_INVOKE_PENDING;
3376 }
3377#endif
3378
3379#if EV_CHILD_ENABLE
3380 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3381 {
3382 ev_ref (EV_A); /* child watcher */
3383 ev_signal_stop (EV_A_ &childev);
3384 }
3385#endif
3386
1420 if (ev_is_active (&pipeev)) 3387 if (ev_is_active (&pipe_w))
1421 { 3388 {
1422 ev_ref (EV_A); /* signal watcher */ 3389 /*ev_ref (EV_A);*/
1423 ev_io_stop (EV_A_ &pipeev); 3390 /*ev_io_stop (EV_A_ &pipe_w);*/
1424 3391
3392 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
3393 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
3394 }
3395
3396#if EV_USE_SIGNALFD
3397 if (ev_is_active (&sigfd_w))
3398 close (sigfd);
3399#endif
3400
1425#if EV_USE_EVENTFD 3401#if EV_USE_TIMERFD
1426 if (evfd >= 0) 3402 if (ev_is_active (&timerfd_w))
1427 close (evfd); 3403 close (timerfd);
1428#endif 3404#endif
1429
1430 if (evpipe [0] >= 0)
1431 {
1432 close (evpipe [0]);
1433 close (evpipe [1]);
1434 }
1435 }
1436 3405
1437#if EV_USE_INOTIFY 3406#if EV_USE_INOTIFY
1438 if (fs_fd >= 0) 3407 if (fs_fd >= 0)
1439 close (fs_fd); 3408 close (fs_fd);
1440#endif 3409#endif
1441 3410
1442 if (backend_fd >= 0) 3411 if (backend_fd >= 0)
1443 close (backend_fd); 3412 close (backend_fd);
1444 3413
3414#if EV_USE_IOCP
3415 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3416#endif
1445#if EV_USE_PORT 3417#if EV_USE_PORT
1446 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3418 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1447#endif 3419#endif
1448#if EV_USE_KQUEUE 3420#if EV_USE_KQUEUE
1449 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3421 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3422#endif
3423#if EV_USE_IOURING
3424 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3425#endif
3426#if EV_USE_LINUXAIO
3427 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1450#endif 3428#endif
1451#if EV_USE_EPOLL 3429#if EV_USE_EPOLL
1452 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3430 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1453#endif 3431#endif
1454#if EV_USE_POLL 3432#if EV_USE_POLL
1455 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3433 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1456#endif 3434#endif
1457#if EV_USE_SELECT 3435#if EV_USE_SELECT
1458 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3436 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1459#endif 3437#endif
1460 3438
1461 for (i = NUMPRI; i--; ) 3439 for (i = NUMPRI; i--; )
1462 { 3440 {
1463 array_free (pending, [i]); 3441 array_free (pending, [i]);
1464#if EV_IDLE_ENABLE 3442#if EV_IDLE_ENABLE
1465 array_free (idle, [i]); 3443 array_free (idle, [i]);
1466#endif 3444#endif
1467 } 3445 }
1468 3446
1469 ev_free (anfds); anfdmax = 0; 3447 ev_free (anfds); anfds = 0; anfdmax = 0;
1470 3448
1471 /* have to use the microsoft-never-gets-it-right macro */ 3449 /* have to use the microsoft-never-gets-it-right macro */
1472 array_free (rfeed, EMPTY); 3450 array_free (rfeed, EMPTY);
1473 array_free (fdchange, EMPTY); 3451 array_free (fdchange, EMPTY);
1474 array_free (timer, EMPTY); 3452 array_free (timer, EMPTY);
… …
1476 array_free (periodic, EMPTY); 3454 array_free (periodic, EMPTY);
1477#endif 3455#endif
1478#if EV_FORK_ENABLE 3456#if EV_FORK_ENABLE
1479 array_free (fork, EMPTY); 3457 array_free (fork, EMPTY);
1480#endif 3458#endif
3459#if EV_CLEANUP_ENABLE
3460 array_free (cleanup, EMPTY);
3461#endif
1481 array_free (prepare, EMPTY); 3462 array_free (prepare, EMPTY);
1482 array_free (check, EMPTY); 3463 array_free (check, EMPTY);
1483#if EV_ASYNC_ENABLE 3464#if EV_ASYNC_ENABLE
1484 array_free (async, EMPTY); 3465 array_free (async, EMPTY);
1485#endif 3466#endif
1486 3467
1487 backend = 0; 3468 backend = 0;
3469
3470#if EV_MULTIPLICITY
3471 if (ev_is_default_loop (EV_A))
3472#endif
3473 ev_default_loop_ptr = 0;
3474#if EV_MULTIPLICITY
3475 else
3476 ev_free (EV_A);
3477#endif
1488} 3478}
1489 3479
1490#if EV_USE_INOTIFY 3480#if EV_USE_INOTIFY
1491inline_size void infy_fork (EV_P); 3481inline_size void infy_fork (EV_P);
1492#endif 3482#endif
1493 3483
1494inline_size void 3484inline_size void
1495loop_fork (EV_P) 3485loop_fork (EV_P)
1496{ 3486{
1497#if EV_USE_PORT 3487#if EV_USE_PORT
1498 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3488 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1499#endif 3489#endif
1500#if EV_USE_KQUEUE 3490#if EV_USE_KQUEUE
1501 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3491 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3492#endif
3493#if EV_USE_IOURING
3494 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3495#endif
3496#if EV_USE_LINUXAIO
3497 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1502#endif 3498#endif
1503#if EV_USE_EPOLL 3499#if EV_USE_EPOLL
1504 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3500 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1505#endif 3501#endif
1506#if EV_USE_INOTIFY 3502#if EV_USE_INOTIFY
1507 infy_fork (EV_A); 3503 infy_fork (EV_A);
1508#endif 3504#endif
1509 3505
1510 if (ev_is_active (&pipeev)) 3506 if (postfork != 2)
1511 { 3507 {
1512 /* this "locks" the handlers against writing to the pipe */ 3508 #if EV_USE_SIGNALFD
1513 /* while we modify the fd vars */ 3509 /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */
1514 gotsig = 1; 3510 #endif
1515#if EV_ASYNC_ENABLE 3511
1516 gotasync = 1; 3512 #if EV_USE_TIMERFD
1517#endif 3513 if (ev_is_active (&timerfd_w))
1518
1519 ev_ref (EV_A);
1520 ev_io_stop (EV_A_ &pipeev);
1521
1522#if EV_USE_EVENTFD
1523 if (evfd >= 0)
1524 close (evfd);
1525#endif
1526
1527 if (evpipe [0] >= 0)
1528 { 3514 {
1529 close (evpipe [0]); 3515 ev_ref (EV_A);
1530 close (evpipe [1]); 3516 ev_io_stop (EV_A_ &timerfd_w);
3517
3518 close (timerfd);
3519 timerfd = -2;
3520
3521 evtimerfd_init (EV_A);
3522 /* reschedule periodics, in case we missed something */
3523 ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM);
1531 } 3524 }
1532 3525 #endif
3526
3527 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3528 if (ev_is_active (&pipe_w))
3529 {
3530 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3531
3532 ev_ref (EV_A);
3533 ev_io_stop (EV_A_ &pipe_w);
3534
3535 if (evpipe [0] >= 0)
3536 EV_WIN32_CLOSE_FD (evpipe [0]);
3537
1533 evpipe_init (EV_A); 3538 evpipe_init (EV_A);
1534 /* now iterate over everything, in case we missed something */ 3539 /* iterate over everything, in case we missed something before */
1535 pipecb (EV_A_ &pipeev, EV_READ); 3540 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3541 }
3542 #endif
1536 } 3543 }
1537 3544
1538 postfork = 0; 3545 postfork = 0;
1539} 3546}
1540 3547
1541#if EV_MULTIPLICITY 3548#if EV_MULTIPLICITY
1542 3549
3550ecb_cold
1543struct ev_loop * 3551struct ev_loop *
1544ev_loop_new (unsigned int flags) 3552ev_loop_new (unsigned int flags) EV_NOEXCEPT
1545{ 3553{
1546 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3554 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1547 3555
1548 memset (loop, 0, sizeof (struct ev_loop)); 3556 memset (EV_A, 0, sizeof (struct ev_loop));
1549
1550 loop_init (EV_A_ flags); 3557 loop_init (EV_A_ flags);
1551 3558
1552 if (ev_backend (EV_A)) 3559 if (ev_backend (EV_A))
1553 return loop; 3560 return EV_A;
1554 3561
3562 ev_free (EV_A);
1555 return 0; 3563 return 0;
1556} 3564}
1557 3565
1558void 3566#endif /* multiplicity */
1559ev_loop_destroy (EV_P)
1560{
1561 loop_destroy (EV_A);
1562 ev_free (loop);
1563}
1564
1565void
1566ev_loop_fork (EV_P)
1567{
1568 postfork = 1; /* must be in line with ev_default_fork */
1569}
1570 3567
1571#if EV_VERIFY 3568#if EV_VERIFY
1572static void noinline 3569ecb_noinline ecb_cold
3570static void
1573verify_watcher (EV_P_ W w) 3571verify_watcher (EV_P_ W w)
1574{ 3572{
1575 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3573 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1576 3574
1577 if (w->pending) 3575 if (w->pending)
1578 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3576 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1579} 3577}
1580 3578
1581static void noinline 3579ecb_noinline ecb_cold
3580static void
1582verify_heap (EV_P_ ANHE *heap, int N) 3581verify_heap (EV_P_ ANHE *heap, int N)
1583{ 3582{
1584 int i; 3583 int i;
1585 3584
1586 for (i = HEAP0; i < N + HEAP0; ++i) 3585 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1591 3590
1592 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3591 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1593 } 3592 }
1594} 3593}
1595 3594
1596static void noinline 3595ecb_noinline ecb_cold
3596static void
1597array_verify (EV_P_ W *ws, int cnt) 3597array_verify (EV_P_ W *ws, int cnt)
1598{ 3598{
1599 while (cnt--) 3599 while (cnt--)
1600 { 3600 {
1601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1602 verify_watcher (EV_A_ ws [cnt]); 3602 verify_watcher (EV_A_ ws [cnt]);
1603 } 3603 }
1604} 3604}
1605#endif 3605#endif
1606 3606
1607void 3607#if EV_FEATURE_API
1608ev_loop_verify (EV_P) 3608void ecb_cold
3609ev_verify (EV_P) EV_NOEXCEPT
1609{ 3610{
1610#if EV_VERIFY 3611#if EV_VERIFY
1611 int i; 3612 int i;
1612 WL w; 3613 WL w, w2;
1613 3614
1614 assert (activecnt >= -1); 3615 assert (activecnt >= -1);
1615 3616
1616 assert (fdchangemax >= fdchangecnt); 3617 assert (fdchangemax >= fdchangecnt);
1617 for (i = 0; i < fdchangecnt; ++i) 3618 for (i = 0; i < fdchangecnt; ++i)
1618 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3619 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1619 3620
1620 assert (anfdmax >= 0); 3621 assert (anfdmax >= 0);
1621 for (i = 0; i < anfdmax; ++i) 3622 for (i = 0; i < anfdmax; ++i)
3623 {
3624 int j = 0;
3625
1622 for (w = anfds [i].head; w; w = w->next) 3626 for (w = w2 = anfds [i].head; w; w = w->next)
1623 { 3627 {
1624 verify_watcher (EV_A_ (W)w); 3628 verify_watcher (EV_A_ (W)w);
3629
3630 if (j++ & 1)
3631 {
3632 assert (("libev: io watcher list contains a loop", w != w2));
3633 w2 = w2->next;
3634 }
3635
1625 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3636 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1626 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3637 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1627 } 3638 }
3639 }
1628 3640
1629 assert (timermax >= timercnt); 3641 assert (timermax >= timercnt);
1630 verify_heap (EV_A_ timers, timercnt); 3642 verify_heap (EV_A_ timers, timercnt);
1631 3643
1632#if EV_PERIODIC_ENABLE 3644#if EV_PERIODIC_ENABLE
… …
1647#if EV_FORK_ENABLE 3659#if EV_FORK_ENABLE
1648 assert (forkmax >= forkcnt); 3660 assert (forkmax >= forkcnt);
1649 array_verify (EV_A_ (W *)forks, forkcnt); 3661 array_verify (EV_A_ (W *)forks, forkcnt);
1650#endif 3662#endif
1651 3663
3664#if EV_CLEANUP_ENABLE
3665 assert (cleanupmax >= cleanupcnt);
3666 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3667#endif
3668
1652#if EV_ASYNC_ENABLE 3669#if EV_ASYNC_ENABLE
1653 assert (asyncmax >= asynccnt); 3670 assert (asyncmax >= asynccnt);
1654 array_verify (EV_A_ (W *)asyncs, asynccnt); 3671 array_verify (EV_A_ (W *)asyncs, asynccnt);
1655#endif 3672#endif
1656 3673
3674#if EV_PREPARE_ENABLE
1657 assert (preparemax >= preparecnt); 3675 assert (preparemax >= preparecnt);
1658 array_verify (EV_A_ (W *)prepares, preparecnt); 3676 array_verify (EV_A_ (W *)prepares, preparecnt);
3677#endif
1659 3678
3679#if EV_CHECK_ENABLE
1660 assert (checkmax >= checkcnt); 3680 assert (checkmax >= checkcnt);
1661 array_verify (EV_A_ (W *)checks, checkcnt); 3681 array_verify (EV_A_ (W *)checks, checkcnt);
3682#endif
1662 3683
1663# if 0 3684# if 0
3685#if EV_CHILD_ENABLE
1664 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 3686 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1665 for (signum = signalmax; signum--; ) if (signals [signum].gotsig) 3687 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3688#endif
1666# endif 3689# endif
1667#endif 3690#endif
1668} 3691}
1669 3692#endif
1670#endif /* multiplicity */
1671 3693
1672#if EV_MULTIPLICITY 3694#if EV_MULTIPLICITY
3695ecb_cold
1673struct ev_loop * 3696struct ev_loop *
1674ev_default_loop_init (unsigned int flags)
1675#else 3697#else
1676int 3698int
3699#endif
1677ev_default_loop (unsigned int flags) 3700ev_default_loop (unsigned int flags) EV_NOEXCEPT
1678#endif
1679{ 3701{
1680 if (!ev_default_loop_ptr) 3702 if (!ev_default_loop_ptr)
1681 { 3703 {
1682#if EV_MULTIPLICITY 3704#if EV_MULTIPLICITY
1683 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3705 EV_P = ev_default_loop_ptr = &default_loop_struct;
1684#else 3706#else
1685 ev_default_loop_ptr = 1; 3707 ev_default_loop_ptr = 1;
1686#endif 3708#endif
1687 3709
1688 loop_init (EV_A_ flags); 3710 loop_init (EV_A_ flags);
1689 3711
1690 if (ev_backend (EV_A)) 3712 if (ev_backend (EV_A))
1691 { 3713 {
1692#ifndef _WIN32 3714#if EV_CHILD_ENABLE
1693 ev_signal_init (&childev, childcb, SIGCHLD); 3715 ev_signal_init (&childev, childcb, SIGCHLD);
1694 ev_set_priority (&childev, EV_MAXPRI); 3716 ev_set_priority (&childev, EV_MAXPRI);
1695 ev_signal_start (EV_A_ &childev); 3717 ev_signal_start (EV_A_ &childev);
1696 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3718 ev_unref (EV_A); /* child watcher should not keep loop alive */
1697#endif 3719#endif
… …
1702 3724
1703 return ev_default_loop_ptr; 3725 return ev_default_loop_ptr;
1704} 3726}
1705 3727
1706void 3728void
1707ev_default_destroy (void) 3729ev_loop_fork (EV_P) EV_NOEXCEPT
1708{ 3730{
1709#if EV_MULTIPLICITY 3731 postfork = 1;
1710 struct ev_loop *loop = ev_default_loop_ptr;
1711#endif
1712
1713 ev_default_loop_ptr = 0;
1714
1715#ifndef _WIN32
1716 ev_ref (EV_A); /* child watcher */
1717 ev_signal_stop (EV_A_ &childev);
1718#endif
1719
1720 loop_destroy (EV_A);
1721}
1722
1723void
1724ev_default_fork (void)
1725{
1726#if EV_MULTIPLICITY
1727 struct ev_loop *loop = ev_default_loop_ptr;
1728#endif
1729
1730 postfork = 1; /* must be in line with ev_loop_fork */
1731} 3732}
1732 3733
1733/*****************************************************************************/ 3734/*****************************************************************************/
1734 3735
1735void 3736void
1736ev_invoke (EV_P_ void *w, int revents) 3737ev_invoke (EV_P_ void *w, int revents)
1737{ 3738{
1738 EV_CB_INVOKE ((W)w, revents); 3739 EV_CB_INVOKE ((W)w, revents);
1739} 3740}
1740 3741
1741inline_speed void 3742unsigned int
1742call_pending (EV_P) 3743ev_pending_count (EV_P) EV_NOEXCEPT
1743{ 3744{
1744 int pri; 3745 int pri;
3746 unsigned int count = 0;
1745 3747
1746 for (pri = NUMPRI; pri--; ) 3748 for (pri = NUMPRI; pri--; )
3749 count += pendingcnt [pri];
3750
3751 return count;
3752}
3753
3754ecb_noinline
3755void
3756ev_invoke_pending (EV_P)
3757{
3758 pendingpri = NUMPRI;
3759
3760 do
3761 {
3762 --pendingpri;
3763
3764 /* pendingpri possibly gets modified in the inner loop */
1747 while (pendingcnt [pri]) 3765 while (pendingcnt [pendingpri])
1748 {
1749 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1750
1751 if (expect_true (p->w))
1752 { 3766 {
1753 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ 3767 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1754 3768
1755 p->w->pending = 0; 3769 p->w->pending = 0;
1756 EV_CB_INVOKE (p->w, p->events); 3770 EV_CB_INVOKE (p->w, p->events);
1757 EV_FREQUENT_CHECK; 3771 EV_FREQUENT_CHECK;
1758 } 3772 }
1759 } 3773 }
3774 while (pendingpri);
1760} 3775}
1761 3776
1762#if EV_IDLE_ENABLE 3777#if EV_IDLE_ENABLE
3778/* make idle watchers pending. this handles the "call-idle */
3779/* only when higher priorities are idle" logic */
1763inline_size void 3780inline_size void
1764idle_reify (EV_P) 3781idle_reify (EV_P)
1765{ 3782{
1766 if (expect_false (idleall)) 3783 if (ecb_expect_false (idleall))
1767 { 3784 {
1768 int pri; 3785 int pri;
1769 3786
1770 for (pri = NUMPRI; pri--; ) 3787 for (pri = NUMPRI; pri--; )
1771 { 3788 {
… …
1780 } 3797 }
1781 } 3798 }
1782} 3799}
1783#endif 3800#endif
1784 3801
3802/* make timers pending */
1785inline_size void 3803inline_size void
1786timers_reify (EV_P) 3804timers_reify (EV_P)
1787{ 3805{
1788 EV_FREQUENT_CHECK; 3806 EV_FREQUENT_CHECK;
1789 3807
… …
1800 { 3818 {
1801 ev_at (w) += w->repeat; 3819 ev_at (w) += w->repeat;
1802 if (ev_at (w) < mn_now) 3820 if (ev_at (w) < mn_now)
1803 ev_at (w) = mn_now; 3821 ev_at (w) = mn_now;
1804 3822
1805 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3823 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
1806 3824
1807 ANHE_at_cache (timers [HEAP0]); 3825 ANHE_at_cache (timers [HEAP0]);
1808 downheap (timers, timercnt, HEAP0); 3826 downheap (timers, timercnt, HEAP0);
1809 } 3827 }
1810 else 3828 else
… …
1813 EV_FREQUENT_CHECK; 3831 EV_FREQUENT_CHECK;
1814 feed_reverse (EV_A_ (W)w); 3832 feed_reverse (EV_A_ (W)w);
1815 } 3833 }
1816 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 3834 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1817 3835
1818 feed_reverse_done (EV_A_ EV_TIMEOUT); 3836 feed_reverse_done (EV_A_ EV_TIMER);
1819 } 3837 }
1820} 3838}
1821 3839
1822#if EV_PERIODIC_ENABLE 3840#if EV_PERIODIC_ENABLE
3841
3842ecb_noinline
3843static void
3844periodic_recalc (EV_P_ ev_periodic *w)
3845{
3846 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3847 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3848
3849 /* the above almost always errs on the low side */
3850 while (at <= ev_rt_now)
3851 {
3852 ev_tstamp nat = at + w->interval;
3853
3854 /* when resolution fails us, we use ev_rt_now */
3855 if (ecb_expect_false (nat == at))
3856 {
3857 at = ev_rt_now;
3858 break;
3859 }
3860
3861 at = nat;
3862 }
3863
3864 ev_at (w) = at;
3865}
3866
3867/* make periodics pending */
1823inline_size void 3868inline_size void
1824periodics_reify (EV_P) 3869periodics_reify (EV_P)
1825{ 3870{
1826 EV_FREQUENT_CHECK; 3871 EV_FREQUENT_CHECK;
1827 3872
1828 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1829 { 3874 {
1830 int feed_count = 0;
1831
1832 do 3875 do
1833 { 3876 {
1834 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3877 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1835 3878
1836 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3879 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
1845 ANHE_at_cache (periodics [HEAP0]); 3888 ANHE_at_cache (periodics [HEAP0]);
1846 downheap (periodics, periodiccnt, HEAP0); 3889 downheap (periodics, periodiccnt, HEAP0);
1847 } 3890 }
1848 else if (w->interval) 3891 else if (w->interval)
1849 { 3892 {
1850 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3893 periodic_recalc (EV_A_ w);
1851 /* if next trigger time is not sufficiently in the future, put it there */
1852 /* this might happen because of floating point inexactness */
1853 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1854 {
1855 ev_at (w) += w->interval;
1856
1857 /* if interval is unreasonably low we might still have a time in the past */
1858 /* so correct this. this will make the periodic very inexact, but the user */
1859 /* has effectively asked to get triggered more often than possible */
1860 if (ev_at (w) < ev_rt_now)
1861 ev_at (w) = ev_rt_now;
1862 }
1863
1864 ANHE_at_cache (periodics [HEAP0]); 3894 ANHE_at_cache (periodics [HEAP0]);
1865 downheap (periodics, periodiccnt, HEAP0); 3895 downheap (periodics, periodiccnt, HEAP0);
1866 } 3896 }
1867 else 3897 else
1868 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3898 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
1874 3904
1875 feed_reverse_done (EV_A_ EV_PERIODIC); 3905 feed_reverse_done (EV_A_ EV_PERIODIC);
1876 } 3906 }
1877} 3907}
1878 3908
1879static void noinline 3909/* simply recalculate all periodics */
3910/* TODO: maybe ensure that at least one event happens when jumping forward? */
3911ecb_noinline ecb_cold
3912static void
1880periodics_reschedule (EV_P) 3913periodics_reschedule (EV_P)
1881{ 3914{
1882 int i; 3915 int i;
1883 3916
1884 /* adjust periodics after time jump */ 3917 /* adjust periodics after time jump */
… …
1887 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3920 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1888 3921
1889 if (w->reschedule_cb) 3922 if (w->reschedule_cb)
1890 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3923 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1891 else if (w->interval) 3924 else if (w->interval)
1892 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3925 periodic_recalc (EV_A_ w);
1893 3926
1894 ANHE_at_cache (periodics [i]); 3927 ANHE_at_cache (periodics [i]);
1895 } 3928 }
1896 3929
1897 reheap (periodics, periodiccnt); 3930 reheap (periodics, periodiccnt);
1898} 3931}
1899#endif 3932#endif
1900 3933
3934/* adjust all timers by a given offset */
3935ecb_noinline ecb_cold
3936static void
3937timers_reschedule (EV_P_ ev_tstamp adjust)
3938{
3939 int i;
3940
3941 for (i = 0; i < timercnt; ++i)
3942 {
3943 ANHE *he = timers + i + HEAP0;
3944 ANHE_w (*he)->at += adjust;
3945 ANHE_at_cache (*he);
3946 }
3947}
3948
3949/* fetch new monotonic and realtime times from the kernel */
3950/* also detect if there was a timejump, and act accordingly */
1901inline_speed void 3951inline_speed void
1902time_update (EV_P_ ev_tstamp max_block) 3952time_update (EV_P_ ev_tstamp max_block)
1903{ 3953{
1904 int i;
1905
1906#if EV_USE_MONOTONIC 3954#if EV_USE_MONOTONIC
1907 if (expect_true (have_monotonic)) 3955 if (ecb_expect_true (have_monotonic))
1908 { 3956 {
3957 int i;
1909 ev_tstamp odiff = rtmn_diff; 3958 ev_tstamp odiff = rtmn_diff;
1910 3959
1911 mn_now = get_clock (); 3960 mn_now = get_clock ();
1912 3961
1913 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3962 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1914 /* interpolate in the meantime */ 3963 /* interpolate in the meantime */
1915 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3964 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
1916 { 3965 {
1917 ev_rt_now = rtmn_diff + mn_now; 3966 ev_rt_now = rtmn_diff + mn_now;
1918 return; 3967 return;
1919 } 3968 }
1920 3969
… …
1929 * doesn't hurt either as we only do this on time-jumps or 3978 * doesn't hurt either as we only do this on time-jumps or
1930 * in the unlikely event of having been preempted here. 3979 * in the unlikely event of having been preempted here.
1931 */ 3980 */
1932 for (i = 4; --i; ) 3981 for (i = 4; --i; )
1933 { 3982 {
3983 ev_tstamp diff;
1934 rtmn_diff = ev_rt_now - mn_now; 3984 rtmn_diff = ev_rt_now - mn_now;
1935 3985
1936 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3986 diff = odiff - rtmn_diff;
3987
3988 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
1937 return; /* all is well */ 3989 return; /* all is well */
1938 3990
1939 ev_rt_now = ev_time (); 3991 ev_rt_now = ev_time ();
1940 mn_now = get_clock (); 3992 mn_now = get_clock ();
1941 now_floor = mn_now; 3993 now_floor = mn_now;
1942 } 3994 }
1943 3995
3996 /* no timer adjustment, as the monotonic clock doesn't jump */
3997 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1944# if EV_PERIODIC_ENABLE 3998# if EV_PERIODIC_ENABLE
1945 periodics_reschedule (EV_A); 3999 periodics_reschedule (EV_A);
1946# endif 4000# endif
1947 /* no timer adjustment, as the monotonic clock doesn't jump */
1948 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1949 } 4001 }
1950 else 4002 else
1951#endif 4003#endif
1952 { 4004 {
1953 ev_rt_now = ev_time (); 4005 ev_rt_now = ev_time ();
1954 4006
1955 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 4007 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
1956 { 4008 {
4009 /* adjust timers. this is easy, as the offset is the same for all of them */
4010 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1957#if EV_PERIODIC_ENABLE 4011#if EV_PERIODIC_ENABLE
1958 periodics_reschedule (EV_A); 4012 periodics_reschedule (EV_A);
1959#endif 4013#endif
1960 /* adjust timers. this is easy, as the offset is the same for all of them */
1961 for (i = 0; i < timercnt; ++i)
1962 {
1963 ANHE *he = timers + i + HEAP0;
1964 ANHE_w (*he)->at += ev_rt_now - mn_now;
1965 ANHE_at_cache (*he);
1966 }
1967 } 4014 }
1968 4015
1969 mn_now = ev_rt_now; 4016 mn_now = ev_rt_now;
1970 } 4017 }
1971} 4018}
1972 4019
1973void 4020int
1974ev_ref (EV_P)
1975{
1976 ++activecnt;
1977}
1978
1979void
1980ev_unref (EV_P)
1981{
1982 --activecnt;
1983}
1984
1985void
1986ev_now_update (EV_P)
1987{
1988 time_update (EV_A_ 1e100);
1989}
1990
1991static int loop_done;
1992
1993void
1994ev_loop (EV_P_ int flags) 4021ev_run (EV_P_ int flags)
1995{ 4022{
4023#if EV_FEATURE_API
4024 ++loop_depth;
4025#endif
4026
4027 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
4028
1996 loop_done = EVUNLOOP_CANCEL; 4029 loop_done = EVBREAK_CANCEL;
1997 4030
1998 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 4031 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1999 4032
2000 do 4033 do
2001 { 4034 {
2002#if EV_VERIFY >= 2 4035#if EV_VERIFY >= 2
2003 ev_loop_verify (EV_A); 4036 ev_verify (EV_A);
2004#endif 4037#endif
2005 4038
2006#ifndef _WIN32 4039#ifndef _WIN32
2007 if (expect_false (curpid)) /* penalise the forking check even more */ 4040 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2008 if (expect_false (getpid () != curpid)) 4041 if (ecb_expect_false (getpid () != curpid))
2009 { 4042 {
2010 curpid = getpid (); 4043 curpid = getpid ();
2011 postfork = 1; 4044 postfork = 1;
2012 } 4045 }
2013#endif 4046#endif
2014 4047
2015#if EV_FORK_ENABLE 4048#if EV_FORK_ENABLE
2016 /* we might have forked, so queue fork handlers */ 4049 /* we might have forked, so queue fork handlers */
2017 if (expect_false (postfork)) 4050 if (ecb_expect_false (postfork))
2018 if (forkcnt) 4051 if (forkcnt)
2019 { 4052 {
2020 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 4053 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2021 call_pending (EV_A); 4054 EV_INVOKE_PENDING;
2022 } 4055 }
2023#endif 4056#endif
2024 4057
4058#if EV_PREPARE_ENABLE
2025 /* queue prepare watchers (and execute them) */ 4059 /* queue prepare watchers (and execute them) */
2026 if (expect_false (preparecnt)) 4060 if (ecb_expect_false (preparecnt))
2027 { 4061 {
2028 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 4062 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2029 call_pending (EV_A); 4063 EV_INVOKE_PENDING;
2030 } 4064 }
4065#endif
4066
4067 if (ecb_expect_false (loop_done))
4068 break;
2031 4069
2032 /* we might have forked, so reify kernel state if necessary */ 4070 /* we might have forked, so reify kernel state if necessary */
2033 if (expect_false (postfork)) 4071 if (ecb_expect_false (postfork))
2034 loop_fork (EV_A); 4072 loop_fork (EV_A);
2035 4073
2036 /* update fd-related kernel structures */ 4074 /* update fd-related kernel structures */
2037 fd_reify (EV_A); 4075 fd_reify (EV_A);
2038 4076
2039 /* calculate blocking time */ 4077 /* calculate blocking time */
2040 { 4078 {
2041 ev_tstamp waittime = 0.; 4079 ev_tstamp waittime = 0.;
2042 ev_tstamp sleeptime = 0.; 4080 ev_tstamp sleeptime = 0.;
2043 4081
4082 /* remember old timestamp for io_blocktime calculation */
4083 ev_tstamp prev_mn_now = mn_now;
4084
4085 /* update time to cancel out callback processing overhead */
4086 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
4087
4088 /* from now on, we want a pipe-wake-up */
4089 pipe_write_wanted = 1;
4090
4091 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
4092
2044 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 4093 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2045 { 4094 {
2046 /* update time to cancel out callback processing overhead */ 4095 waittime = EV_TS_CONST (MAX_BLOCKTIME);
2047 time_update (EV_A_ 1e100); 4096
4097#if EV_USE_TIMERFD
4098 /* sleep a lot longer when we can reliably detect timejumps */
4099 if (ecb_expect_true (timerfd >= 0))
4100 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4101#endif
4102#if !EV_PERIODIC_ENABLE
4103 /* without periodics but with monotonic clock there is no need */
4104 /* for any time jump detection, so sleep longer */
4105 if (ecb_expect_true (have_monotonic))
4106 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4107#endif
2048 4108
2049 if (timercnt) 4109 if (timercnt)
2050 { 4110 {
2051 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 4111 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2052 if (waittime > to) waittime = to; 4112 if (waittime > to) waittime = to;
2053 } 4113 }
2054 4114
2055#if EV_PERIODIC_ENABLE 4115#if EV_PERIODIC_ENABLE
2056 if (periodiccnt) 4116 if (periodiccnt)
2057 { 4117 {
2058 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 4118 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2059 if (waittime > to) waittime = to; 4119 if (waittime > to) waittime = to;
2060 } 4120 }
2061#endif 4121#endif
2062 4122
4123 /* don't let timeouts decrease the waittime below timeout_blocktime */
2063 if (expect_false (waittime < timeout_blocktime)) 4124 if (ecb_expect_false (waittime < timeout_blocktime))
2064 waittime = timeout_blocktime; 4125 waittime = timeout_blocktime;
2065 4126
2066 sleeptime = waittime - backend_fudge; 4127 /* now there are two more special cases left, either we have
4128 * already-expired timers, so we should not sleep, or we have timers
4129 * that expire very soon, in which case we need to wait for a minimum
4130 * amount of time for some event loop backends.
4131 */
4132 if (ecb_expect_false (waittime < backend_mintime))
4133 waittime = waittime <= EV_TS_CONST (0.)
4134 ? EV_TS_CONST (0.)
4135 : backend_mintime;
2067 4136
4137 /* extra check because io_blocktime is commonly 0 */
2068 if (expect_true (sleeptime > io_blocktime)) 4138 if (ecb_expect_false (io_blocktime))
2069 sleeptime = io_blocktime;
2070
2071 if (sleeptime)
2072 { 4139 {
4140 sleeptime = io_blocktime - (mn_now - prev_mn_now);
4141
4142 if (sleeptime > waittime - backend_mintime)
4143 sleeptime = waittime - backend_mintime;
4144
4145 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
4146 {
2073 ev_sleep (sleeptime); 4147 ev_sleep (sleeptime);
2074 waittime -= sleeptime; 4148 waittime -= sleeptime;
4149 }
2075 } 4150 }
2076 } 4151 }
2077 4152
4153#if EV_FEATURE_API
2078 ++loop_count; 4154 ++loop_count;
4155#endif
4156 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2079 backend_poll (EV_A_ waittime); 4157 backend_poll (EV_A_ waittime);
4158 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
4159
4160 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
4161
4162 ECB_MEMORY_FENCE_ACQUIRE;
4163 if (pipe_write_skipped)
4164 {
4165 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
4166 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
4167 }
2080 4168
2081 /* update ev_rt_now, do magic */ 4169 /* update ev_rt_now, do magic */
2082 time_update (EV_A_ waittime + sleeptime); 4170 time_update (EV_A_ waittime + sleeptime);
2083 } 4171 }
2084 4172
… …
2091#if EV_IDLE_ENABLE 4179#if EV_IDLE_ENABLE
2092 /* queue idle watchers unless other events are pending */ 4180 /* queue idle watchers unless other events are pending */
2093 idle_reify (EV_A); 4181 idle_reify (EV_A);
2094#endif 4182#endif
2095 4183
4184#if EV_CHECK_ENABLE
2096 /* queue check watchers, to be executed first */ 4185 /* queue check watchers, to be executed first */
2097 if (expect_false (checkcnt)) 4186 if (ecb_expect_false (checkcnt))
2098 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 4187 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
4188#endif
2099 4189
2100 call_pending (EV_A); 4190 EV_INVOKE_PENDING;
2101 } 4191 }
2102 while (expect_true ( 4192 while (ecb_expect_true (
2103 activecnt 4193 activecnt
2104 && !loop_done 4194 && !loop_done
2105 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 4195 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2106 )); 4196 ));
2107 4197
2108 if (loop_done == EVUNLOOP_ONE) 4198 if (loop_done == EVBREAK_ONE)
2109 loop_done = EVUNLOOP_CANCEL; 4199 loop_done = EVBREAK_CANCEL;
4200
4201#if EV_FEATURE_API
4202 --loop_depth;
4203#endif
4204
4205 return activecnt;
2110} 4206}
2111 4207
2112void 4208void
2113ev_unloop (EV_P_ int how) 4209ev_break (EV_P_ int how) EV_NOEXCEPT
2114{ 4210{
2115 loop_done = how; 4211 loop_done = how;
2116} 4212}
2117 4213
4214void
4215ev_ref (EV_P) EV_NOEXCEPT
4216{
4217 ++activecnt;
4218}
4219
4220void
4221ev_unref (EV_P) EV_NOEXCEPT
4222{
4223 --activecnt;
4224}
4225
4226void
4227ev_now_update (EV_P) EV_NOEXCEPT
4228{
4229 time_update (EV_A_ EV_TSTAMP_HUGE);
4230}
4231
4232void
4233ev_suspend (EV_P) EV_NOEXCEPT
4234{
4235 ev_now_update (EV_A);
4236}
4237
4238void
4239ev_resume (EV_P) EV_NOEXCEPT
4240{
4241 ev_tstamp mn_prev = mn_now;
4242
4243 ev_now_update (EV_A);
4244 timers_reschedule (EV_A_ mn_now - mn_prev);
4245#if EV_PERIODIC_ENABLE
4246 /* TODO: really do this? */
4247 periodics_reschedule (EV_A);
4248#endif
4249}
4250
2118/*****************************************************************************/ 4251/*****************************************************************************/
4252/* singly-linked list management, used when the expected list length is short */
2119 4253
2120inline_size void 4254inline_size void
2121wlist_add (WL *head, WL elem) 4255wlist_add (WL *head, WL elem)
2122{ 4256{
2123 elem->next = *head; 4257 elem->next = *head;
… …
2127inline_size void 4261inline_size void
2128wlist_del (WL *head, WL elem) 4262wlist_del (WL *head, WL elem)
2129{ 4263{
2130 while (*head) 4264 while (*head)
2131 { 4265 {
2132 if (*head == elem) 4266 if (ecb_expect_true (*head == elem))
2133 { 4267 {
2134 *head = elem->next; 4268 *head = elem->next;
2135 return; 4269 break;
2136 } 4270 }
2137 4271
2138 head = &(*head)->next; 4272 head = &(*head)->next;
2139 } 4273 }
2140} 4274}
2141 4275
4276/* internal, faster, version of ev_clear_pending */
2142inline_speed void 4277inline_speed void
2143clear_pending (EV_P_ W w) 4278clear_pending (EV_P_ W w)
2144{ 4279{
2145 if (w->pending) 4280 if (w->pending)
2146 { 4281 {
2147 pendings [ABSPRI (w)][w->pending - 1].w = 0; 4282 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2148 w->pending = 0; 4283 w->pending = 0;
2149 } 4284 }
2150} 4285}
2151 4286
2152int 4287int
2153ev_clear_pending (EV_P_ void *w) 4288ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2154{ 4289{
2155 W w_ = (W)w; 4290 W w_ = (W)w;
2156 int pending = w_->pending; 4291 int pending = w_->pending;
2157 4292
2158 if (expect_true (pending)) 4293 if (ecb_expect_true (pending))
2159 { 4294 {
2160 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4295 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
4296 p->w = (W)&pending_w;
2161 w_->pending = 0; 4297 w_->pending = 0;
2162 p->w = 0;
2163 return p->events; 4298 return p->events;
2164 } 4299 }
2165 else 4300 else
2166 return 0; 4301 return 0;
2167} 4302}
2168 4303
2169inline_size void 4304inline_size void
2170pri_adjust (EV_P_ W w) 4305pri_adjust (EV_P_ W w)
2171{ 4306{
2172 int pri = w->priority; 4307 int pri = ev_priority (w);
2173 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 4308 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2174 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 4309 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2175 w->priority = pri; 4310 ev_set_priority (w, pri);
2176} 4311}
2177 4312
2178inline_speed void 4313inline_speed void
2179ev_start (EV_P_ W w, int active) 4314ev_start (EV_P_ W w, int active)
2180{ 4315{
… …
2190 w->active = 0; 4325 w->active = 0;
2191} 4326}
2192 4327
2193/*****************************************************************************/ 4328/*****************************************************************************/
2194 4329
2195void noinline 4330ecb_noinline
4331void
2196ev_io_start (EV_P_ ev_io *w) 4332ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2197{ 4333{
2198 int fd = w->fd; 4334 int fd = w->fd;
2199 4335
2200 if (expect_false (ev_is_active (w))) 4336 if (ecb_expect_false (ev_is_active (w)))
2201 return; 4337 return;
2202 4338
2203 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4339 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2204 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4340 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2205 4341
4342#if EV_VERIFY >= 2
4343 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4344#endif
2206 EV_FREQUENT_CHECK; 4345 EV_FREQUENT_CHECK;
2207 4346
2208 ev_start (EV_A_ (W)w, 1); 4347 ev_start (EV_A_ (W)w, 1);
2209 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4348 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2210 wlist_add (&anfds[fd].head, (WL)w); 4349 wlist_add (&anfds[fd].head, (WL)w);
2211 4350
4351 /* common bug, apparently */
4352 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
4353
2212 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1); 4354 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2213 w->events &= ~EV__IOFDSET; 4355 w->events &= ~EV__IOFDSET;
2214 4356
2215 EV_FREQUENT_CHECK; 4357 EV_FREQUENT_CHECK;
2216} 4358}
2217 4359
2218void noinline 4360ecb_noinline
4361void
2219ev_io_stop (EV_P_ ev_io *w) 4362ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2220{ 4363{
2221 clear_pending (EV_A_ (W)w); 4364 clear_pending (EV_A_ (W)w);
2222 if (expect_false (!ev_is_active (w))) 4365 if (ecb_expect_false (!ev_is_active (w)))
2223 return; 4366 return;
2224 4367
2225 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4368 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2226 4369
4370#if EV_VERIFY >= 2
4371 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4372#endif
2227 EV_FREQUENT_CHECK; 4373 EV_FREQUENT_CHECK;
2228 4374
2229 wlist_del (&anfds[w->fd].head, (WL)w); 4375 wlist_del (&anfds[w->fd].head, (WL)w);
2230 ev_stop (EV_A_ (W)w); 4376 ev_stop (EV_A_ (W)w);
2231 4377
2232 fd_change (EV_A_ w->fd, 1); 4378 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2233 4379
2234 EV_FREQUENT_CHECK; 4380 EV_FREQUENT_CHECK;
2235} 4381}
2236 4382
2237void noinline 4383ecb_noinline
4384void
2238ev_timer_start (EV_P_ ev_timer *w) 4385ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2239{ 4386{
2240 if (expect_false (ev_is_active (w))) 4387 if (ecb_expect_false (ev_is_active (w)))
2241 return; 4388 return;
2242 4389
2243 ev_at (w) += mn_now; 4390 ev_at (w) += mn_now;
2244 4391
2245 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4392 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2246 4393
2247 EV_FREQUENT_CHECK; 4394 EV_FREQUENT_CHECK;
2248 4395
2249 ++timercnt; 4396 ++timercnt;
2250 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4397 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2251 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4398 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2252 ANHE_w (timers [ev_active (w)]) = (WT)w; 4399 ANHE_w (timers [ev_active (w)]) = (WT)w;
2253 ANHE_at_cache (timers [ev_active (w)]); 4400 ANHE_at_cache (timers [ev_active (w)]);
2254 upheap (timers, ev_active (w)); 4401 upheap (timers, ev_active (w));
2255 4402
2256 EV_FREQUENT_CHECK; 4403 EV_FREQUENT_CHECK;
2257 4404
2258 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4405 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2259} 4406}
2260 4407
2261void noinline 4408ecb_noinline
4409void
2262ev_timer_stop (EV_P_ ev_timer *w) 4410ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2263{ 4411{
2264 clear_pending (EV_A_ (W)w); 4412 clear_pending (EV_A_ (W)w);
2265 if (expect_false (!ev_is_active (w))) 4413 if (ecb_expect_false (!ev_is_active (w)))
2266 return; 4414 return;
2267 4415
2268 EV_FREQUENT_CHECK; 4416 EV_FREQUENT_CHECK;
2269 4417
2270 { 4418 {
… …
2272 4420
2273 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4421 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2274 4422
2275 --timercnt; 4423 --timercnt;
2276 4424
2277 if (expect_true (active < timercnt + HEAP0)) 4425 if (ecb_expect_true (active < timercnt + HEAP0))
2278 { 4426 {
2279 timers [active] = timers [timercnt + HEAP0]; 4427 timers [active] = timers [timercnt + HEAP0];
2280 adjustheap (timers, timercnt, active); 4428 adjustheap (timers, timercnt, active);
2281 } 4429 }
2282 } 4430 }
2283 4431
4432 ev_at (w) -= mn_now;
4433
4434 ev_stop (EV_A_ (W)w);
4435
2284 EV_FREQUENT_CHECK; 4436 EV_FREQUENT_CHECK;
2285
2286 ev_at (w) -= mn_now;
2287
2288 ev_stop (EV_A_ (W)w);
2289} 4437}
2290 4438
2291void noinline 4439ecb_noinline
4440void
2292ev_timer_again (EV_P_ ev_timer *w) 4441ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2293{ 4442{
2294 EV_FREQUENT_CHECK; 4443 EV_FREQUENT_CHECK;
4444
4445 clear_pending (EV_A_ (W)w);
2295 4446
2296 if (ev_is_active (w)) 4447 if (ev_is_active (w))
2297 { 4448 {
2298 if (w->repeat) 4449 if (w->repeat)
2299 { 4450 {
… …
2311 } 4462 }
2312 4463
2313 EV_FREQUENT_CHECK; 4464 EV_FREQUENT_CHECK;
2314} 4465}
2315 4466
4467ev_tstamp
4468ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4469{
4470 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
4471}
4472
2316#if EV_PERIODIC_ENABLE 4473#if EV_PERIODIC_ENABLE
2317void noinline 4474ecb_noinline
4475void
2318ev_periodic_start (EV_P_ ev_periodic *w) 4476ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2319{ 4477{
2320 if (expect_false (ev_is_active (w))) 4478 if (ecb_expect_false (ev_is_active (w)))
2321 return; 4479 return;
4480
4481#if EV_USE_TIMERFD
4482 if (timerfd == -2)
4483 evtimerfd_init (EV_A);
4484#endif
2322 4485
2323 if (w->reschedule_cb) 4486 if (w->reschedule_cb)
2324 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4487 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2325 else if (w->interval) 4488 else if (w->interval)
2326 { 4489 {
2327 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4490 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2328 /* this formula differs from the one in periodic_reify because we do not always round up */ 4491 periodic_recalc (EV_A_ w);
2329 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2330 } 4492 }
2331 else 4493 else
2332 ev_at (w) = w->offset; 4494 ev_at (w) = w->offset;
2333 4495
2334 EV_FREQUENT_CHECK; 4496 EV_FREQUENT_CHECK;
2335 4497
2336 ++periodiccnt; 4498 ++periodiccnt;
2337 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4499 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2338 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4500 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2339 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4501 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2340 ANHE_at_cache (periodics [ev_active (w)]); 4502 ANHE_at_cache (periodics [ev_active (w)]);
2341 upheap (periodics, ev_active (w)); 4503 upheap (periodics, ev_active (w));
2342 4504
2343 EV_FREQUENT_CHECK; 4505 EV_FREQUENT_CHECK;
2344 4506
2345 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4507 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2346} 4508}
2347 4509
2348void noinline 4510ecb_noinline
4511void
2349ev_periodic_stop (EV_P_ ev_periodic *w) 4512ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2350{ 4513{
2351 clear_pending (EV_A_ (W)w); 4514 clear_pending (EV_A_ (W)w);
2352 if (expect_false (!ev_is_active (w))) 4515 if (ecb_expect_false (!ev_is_active (w)))
2353 return; 4516 return;
2354 4517
2355 EV_FREQUENT_CHECK; 4518 EV_FREQUENT_CHECK;
2356 4519
2357 { 4520 {
… …
2359 4522
2360 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4523 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2361 4524
2362 --periodiccnt; 4525 --periodiccnt;
2363 4526
2364 if (expect_true (active < periodiccnt + HEAP0)) 4527 if (ecb_expect_true (active < periodiccnt + HEAP0))
2365 { 4528 {
2366 periodics [active] = periodics [periodiccnt + HEAP0]; 4529 periodics [active] = periodics [periodiccnt + HEAP0];
2367 adjustheap (periodics, periodiccnt, active); 4530 adjustheap (periodics, periodiccnt, active);
2368 } 4531 }
2369 } 4532 }
2370 4533
4534 ev_stop (EV_A_ (W)w);
4535
2371 EV_FREQUENT_CHECK; 4536 EV_FREQUENT_CHECK;
2372
2373 ev_stop (EV_A_ (W)w);
2374} 4537}
2375 4538
2376void noinline 4539ecb_noinline
4540void
2377ev_periodic_again (EV_P_ ev_periodic *w) 4541ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2378{ 4542{
2379 /* TODO: use adjustheap and recalculation */ 4543 /* TODO: use adjustheap and recalculation */
2380 ev_periodic_stop (EV_A_ w); 4544 ev_periodic_stop (EV_A_ w);
2381 ev_periodic_start (EV_A_ w); 4545 ev_periodic_start (EV_A_ w);
2382} 4546}
… …
2384 4548
2385#ifndef SA_RESTART 4549#ifndef SA_RESTART
2386# define SA_RESTART 0 4550# define SA_RESTART 0
2387#endif 4551#endif
2388 4552
2389void noinline 4553#if EV_SIGNAL_ENABLE
4554
4555ecb_noinline
4556void
2390ev_signal_start (EV_P_ ev_signal *w) 4557ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2391{ 4558{
4559 if (ecb_expect_false (ev_is_active (w)))
4560 return;
4561
4562 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
4563
2392#if EV_MULTIPLICITY 4564#if EV_MULTIPLICITY
2393 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4565 assert (("libev: a signal must not be attached to two different loops",
2394#endif 4566 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2395 if (expect_false (ev_is_active (w)))
2396 return;
2397 4567
2398 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0)); 4568 signals [w->signum - 1].loop = EV_A;
2399 4569 ECB_MEMORY_FENCE_RELEASE;
2400 evpipe_init (EV_A); 4570#endif
2401 4571
2402 EV_FREQUENT_CHECK; 4572 EV_FREQUENT_CHECK;
2403 4573
4574#if EV_USE_SIGNALFD
4575 if (sigfd == -2)
2404 { 4576 {
2405#ifndef _WIN32 4577 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2406 sigset_t full, prev; 4578 if (sigfd < 0 && errno == EINVAL)
2407 sigfillset (&full); 4579 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2408 sigprocmask (SIG_SETMASK, &full, &prev);
2409#endif
2410 4580
2411 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); 4581 if (sigfd >= 0)
4582 {
4583 fd_intern (sigfd); /* doing it twice will not hurt */
2412 4584
2413#ifndef _WIN32 4585 sigemptyset (&sigfd_set);
2414 sigprocmask (SIG_SETMASK, &prev, 0); 4586
2415#endif 4587 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4588 ev_set_priority (&sigfd_w, EV_MAXPRI);
4589 ev_io_start (EV_A_ &sigfd_w);
4590 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4591 }
2416 } 4592 }
4593
4594 if (sigfd >= 0)
4595 {
4596 /* TODO: check .head */
4597 sigaddset (&sigfd_set, w->signum);
4598 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4599
4600 signalfd (sigfd, &sigfd_set, 0);
4601 }
4602#endif
2417 4603
2418 ev_start (EV_A_ (W)w, 1); 4604 ev_start (EV_A_ (W)w, 1);
2419 wlist_add (&signals [w->signum - 1].head, (WL)w); 4605 wlist_add (&signals [w->signum - 1].head, (WL)w);
2420 4606
2421 if (!((WL)w)->next) 4607 if (!((WL)w)->next)
4608# if EV_USE_SIGNALFD
4609 if (sigfd < 0) /*TODO*/
4610# endif
2422 { 4611 {
2423#if _WIN32 4612# ifdef _WIN32
4613 evpipe_init (EV_A);
4614
2424 signal (w->signum, ev_sighandler); 4615 signal (w->signum, ev_sighandler);
2425#else 4616# else
2426 struct sigaction sa; 4617 struct sigaction sa;
4618
4619 evpipe_init (EV_A);
4620
2427 sa.sa_handler = ev_sighandler; 4621 sa.sa_handler = ev_sighandler;
2428 sigfillset (&sa.sa_mask); 4622 sigfillset (&sa.sa_mask);
2429 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4623 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2430 sigaction (w->signum, &sa, 0); 4624 sigaction (w->signum, &sa, 0);
4625
4626 if (origflags & EVFLAG_NOSIGMASK)
4627 {
4628 sigemptyset (&sa.sa_mask);
4629 sigaddset (&sa.sa_mask, w->signum);
4630 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4631 }
2431#endif 4632#endif
2432 } 4633 }
2433 4634
2434 EV_FREQUENT_CHECK; 4635 EV_FREQUENT_CHECK;
2435} 4636}
2436 4637
2437void noinline 4638ecb_noinline
4639void
2438ev_signal_stop (EV_P_ ev_signal *w) 4640ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2439{ 4641{
2440 clear_pending (EV_A_ (W)w); 4642 clear_pending (EV_A_ (W)w);
2441 if (expect_false (!ev_is_active (w))) 4643 if (ecb_expect_false (!ev_is_active (w)))
2442 return; 4644 return;
2443 4645
2444 EV_FREQUENT_CHECK; 4646 EV_FREQUENT_CHECK;
2445 4647
2446 wlist_del (&signals [w->signum - 1].head, (WL)w); 4648 wlist_del (&signals [w->signum - 1].head, (WL)w);
2447 ev_stop (EV_A_ (W)w); 4649 ev_stop (EV_A_ (W)w);
2448 4650
2449 if (!signals [w->signum - 1].head) 4651 if (!signals [w->signum - 1].head)
4652 {
4653#if EV_MULTIPLICITY
4654 signals [w->signum - 1].loop = 0; /* unattach from signal */
4655#endif
4656#if EV_USE_SIGNALFD
4657 if (sigfd >= 0)
4658 {
4659 sigset_t ss;
4660
4661 sigemptyset (&ss);
4662 sigaddset (&ss, w->signum);
4663 sigdelset (&sigfd_set, w->signum);
4664
4665 signalfd (sigfd, &sigfd_set, 0);
4666 sigprocmask (SIG_UNBLOCK, &ss, 0);
4667 }
4668 else
4669#endif
2450 signal (w->signum, SIG_DFL); 4670 signal (w->signum, SIG_DFL);
4671 }
2451 4672
2452 EV_FREQUENT_CHECK; 4673 EV_FREQUENT_CHECK;
2453} 4674}
2454 4675
4676#endif
4677
4678#if EV_CHILD_ENABLE
4679
2455void 4680void
2456ev_child_start (EV_P_ ev_child *w) 4681ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2457{ 4682{
2458#if EV_MULTIPLICITY 4683#if EV_MULTIPLICITY
2459 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4684 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2460#endif 4685#endif
2461 if (expect_false (ev_is_active (w))) 4686 if (ecb_expect_false (ev_is_active (w)))
2462 return; 4687 return;
2463 4688
2464 EV_FREQUENT_CHECK; 4689 EV_FREQUENT_CHECK;
2465 4690
2466 ev_start (EV_A_ (W)w, 1); 4691 ev_start (EV_A_ (W)w, 1);
2467 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4692 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2468 4693
2469 EV_FREQUENT_CHECK; 4694 EV_FREQUENT_CHECK;
2470} 4695}
2471 4696
2472void 4697void
2473ev_child_stop (EV_P_ ev_child *w) 4698ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2474{ 4699{
2475 clear_pending (EV_A_ (W)w); 4700 clear_pending (EV_A_ (W)w);
2476 if (expect_false (!ev_is_active (w))) 4701 if (ecb_expect_false (!ev_is_active (w)))
2477 return; 4702 return;
2478 4703
2479 EV_FREQUENT_CHECK; 4704 EV_FREQUENT_CHECK;
2480 4705
2481 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4706 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2482 ev_stop (EV_A_ (W)w); 4707 ev_stop (EV_A_ (W)w);
2483 4708
2484 EV_FREQUENT_CHECK; 4709 EV_FREQUENT_CHECK;
2485} 4710}
4711
4712#endif
2486 4713
2487#if EV_STAT_ENABLE 4714#if EV_STAT_ENABLE
2488 4715
2489# ifdef _WIN32 4716# ifdef _WIN32
2490# undef lstat 4717# undef lstat
… …
2493 4720
2494#define DEF_STAT_INTERVAL 5.0074891 4721#define DEF_STAT_INTERVAL 5.0074891
2495#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4722#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2496#define MIN_STAT_INTERVAL 0.1074891 4723#define MIN_STAT_INTERVAL 0.1074891
2497 4724
2498static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4725ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2499 4726
2500#if EV_USE_INOTIFY 4727#if EV_USE_INOTIFY
2501# define EV_INOTIFY_BUFSIZE 8192
2502 4728
2503static void noinline 4729/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4730# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4731
4732ecb_noinline
4733static void
2504infy_add (EV_P_ ev_stat *w) 4734infy_add (EV_P_ ev_stat *w)
2505{ 4735{
2506 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 4736 w->wd = inotify_add_watch (fs_fd, w->path,
4737 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4738 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4739 | IN_DONT_FOLLOW | IN_MASK_ADD);
2507 4740
2508 if (w->wd < 0) 4741 if (w->wd >= 0)
4742 {
4743 struct statfs sfs;
4744
4745 /* now local changes will be tracked by inotify, but remote changes won't */
4746 /* unless the filesystem is known to be local, we therefore still poll */
4747 /* also do poll on <2.6.25, but with normal frequency */
4748
4749 if (!fs_2625)
4750 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4751 else if (!statfs (w->path, &sfs)
4752 && (sfs.f_type == 0x1373 /* devfs */
4753 || sfs.f_type == 0x4006 /* fat */
4754 || sfs.f_type == 0x4d44 /* msdos */
4755 || sfs.f_type == 0xEF53 /* ext2/3 */
4756 || sfs.f_type == 0x72b6 /* jffs2 */
4757 || sfs.f_type == 0x858458f6 /* ramfs */
4758 || sfs.f_type == 0x5346544e /* ntfs */
4759 || sfs.f_type == 0x3153464a /* jfs */
4760 || sfs.f_type == 0x9123683e /* btrfs */
4761 || sfs.f_type == 0x52654973 /* reiser3 */
4762 || sfs.f_type == 0x01021994 /* tmpfs */
4763 || sfs.f_type == 0x58465342 /* xfs */))
4764 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4765 else
4766 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2509 { 4767 }
4768 else
4769 {
4770 /* can't use inotify, continue to stat */
2510 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4771 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2511 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2512 4772
2513 /* monitor some parent directory for speedup hints */ 4773 /* if path is not there, monitor some parent directory for speedup hints */
2514 /* note that exceeding the hardcoded path limit is not a correctness issue, */ 4774 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2515 /* but an efficiency issue only */ 4775 /* but an efficiency issue only */
2516 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4776 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2517 { 4777 {
2518 char path [4096]; 4778 char path [4096];
… …
2528 if (!pend || pend == path) 4788 if (!pend || pend == path)
2529 break; 4789 break;
2530 4790
2531 *pend = 0; 4791 *pend = 0;
2532 w->wd = inotify_add_watch (fs_fd, path, mask); 4792 w->wd = inotify_add_watch (fs_fd, path, mask);
2533 } 4793 }
2534 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4794 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2535 } 4795 }
2536 } 4796 }
2537 4797
2538 if (w->wd >= 0) 4798 if (w->wd >= 0)
2539 {
2540 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4799 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2541 4800
2542 /* now local changes will be tracked by inotify, but remote changes won't */ 4801 /* now re-arm timer, if required */
2543 /* unless the filesystem it known to be local, we therefore still poll */ 4802 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2544 /* also do poll on <2.6.25, but with normal frequency */
2545 struct statfs sfs;
2546
2547 if (fs_2625 && !statfs (w->path, &sfs))
2548 if (sfs.f_type == 0x1373 /* devfs */
2549 || sfs.f_type == 0xEF53 /* ext2/3 */
2550 || sfs.f_type == 0x3153464a /* jfs */
2551 || sfs.f_type == 0x52654973 /* reiser3 */
2552 || sfs.f_type == 0x01021994 /* tempfs */
2553 || sfs.f_type == 0x58465342 /* xfs */)
2554 return;
2555
2556 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2557 ev_timer_again (EV_A_ &w->timer); 4803 ev_timer_again (EV_A_ &w->timer);
2558 } 4804 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2559} 4805}
2560 4806
2561static void noinline 4807ecb_noinline
4808static void
2562infy_del (EV_P_ ev_stat *w) 4809infy_del (EV_P_ ev_stat *w)
2563{ 4810{
2564 int slot; 4811 int slot;
2565 int wd = w->wd; 4812 int wd = w->wd;
2566 4813
2567 if (wd < 0) 4814 if (wd < 0)
2568 return; 4815 return;
2569 4816
2570 w->wd = -2; 4817 w->wd = -2;
2571 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4818 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2572 wlist_del (&fs_hash [slot].head, (WL)w); 4819 wlist_del (&fs_hash [slot].head, (WL)w);
2573 4820
2574 /* remove this watcher, if others are watching it, they will rearm */ 4821 /* remove this watcher, if others are watching it, they will rearm */
2575 inotify_rm_watch (fs_fd, wd); 4822 inotify_rm_watch (fs_fd, wd);
2576} 4823}
2577 4824
2578static void noinline 4825ecb_noinline
4826static void
2579infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4827infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2580{ 4828{
2581 if (slot < 0) 4829 if (slot < 0)
2582 /* overflow, need to check for all hash slots */ 4830 /* overflow, need to check for all hash slots */
2583 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4831 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2584 infy_wd (EV_A_ slot, wd, ev); 4832 infy_wd (EV_A_ slot, wd, ev);
2585 else 4833 else
2586 { 4834 {
2587 WL w_; 4835 WL w_;
2588 4836
2589 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4837 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2590 { 4838 {
2591 ev_stat *w = (ev_stat *)w_; 4839 ev_stat *w = (ev_stat *)w_;
2592 w_ = w_->next; /* lets us remove this watcher and all before it */ 4840 w_ = w_->next; /* lets us remove this watcher and all before it */
2593 4841
2594 if (w->wd == wd || wd == -1) 4842 if (w->wd == wd || wd == -1)
2595 { 4843 {
2596 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4844 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2597 { 4845 {
2598 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4846 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2599 w->wd = -1; 4847 w->wd = -1;
2600 infy_add (EV_A_ w); /* re-add, no matter what */ 4848 infy_add (EV_A_ w); /* re-add, no matter what */
2601 } 4849 }
2602 4850
2603 stat_timer_cb (EV_A_ &w->timer, 0); 4851 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2608 4856
2609static void 4857static void
2610infy_cb (EV_P_ ev_io *w, int revents) 4858infy_cb (EV_P_ ev_io *w, int revents)
2611{ 4859{
2612 char buf [EV_INOTIFY_BUFSIZE]; 4860 char buf [EV_INOTIFY_BUFSIZE];
2613 struct inotify_event *ev = (struct inotify_event *)buf;
2614 int ofs; 4861 int ofs;
2615 int len = read (fs_fd, buf, sizeof (buf)); 4862 int len = read (fs_fd, buf, sizeof (buf));
2616 4863
2617 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4864 for (ofs = 0; ofs < len; )
4865 {
4866 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2618 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4867 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4868 ofs += sizeof (struct inotify_event) + ev->len;
4869 }
2619} 4870}
2620 4871
2621inline_size void 4872inline_size ecb_cold
4873void
2622check_2625 (EV_P) 4874ev_check_2625 (EV_P)
2623{ 4875{
2624 /* kernels < 2.6.25 are borked 4876 /* kernels < 2.6.25 are borked
2625 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4877 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2626 */ 4878 */
2627 struct utsname buf; 4879 if (ev_linux_version () < 0x020619)
2628 int major, minor, micro;
2629
2630 if (uname (&buf))
2631 return; 4880 return;
2632 4881
2633 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2634 return;
2635
2636 if (major < 2
2637 || (major == 2 && minor < 6)
2638 || (major == 2 && minor == 6 && micro < 25))
2639 return;
2640
2641 fs_2625 = 1; 4882 fs_2625 = 1;
4883}
4884
4885inline_size int
4886infy_newfd (void)
4887{
4888#if defined IN_CLOEXEC && defined IN_NONBLOCK
4889 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4890 if (fd >= 0)
4891 return fd;
4892#endif
4893 return inotify_init ();
2642} 4894}
2643 4895
2644inline_size void 4896inline_size void
2645infy_init (EV_P) 4897infy_init (EV_P)
2646{ 4898{
2647 if (fs_fd != -2) 4899 if (fs_fd != -2)
2648 return; 4900 return;
2649 4901
2650 fs_fd = -1; 4902 fs_fd = -1;
2651 4903
2652 check_2625 (EV_A); 4904 ev_check_2625 (EV_A);
2653 4905
2654 fs_fd = inotify_init (); 4906 fs_fd = infy_newfd ();
2655 4907
2656 if (fs_fd >= 0) 4908 if (fs_fd >= 0)
2657 { 4909 {
4910 fd_intern (fs_fd);
2658 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4911 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2659 ev_set_priority (&fs_w, EV_MAXPRI); 4912 ev_set_priority (&fs_w, EV_MAXPRI);
2660 ev_io_start (EV_A_ &fs_w); 4913 ev_io_start (EV_A_ &fs_w);
4914 ev_unref (EV_A);
2661 } 4915 }
2662} 4916}
2663 4917
2664inline_size void 4918inline_size void
2665infy_fork (EV_P) 4919infy_fork (EV_P)
… …
2667 int slot; 4921 int slot;
2668 4922
2669 if (fs_fd < 0) 4923 if (fs_fd < 0)
2670 return; 4924 return;
2671 4925
4926 ev_ref (EV_A);
4927 ev_io_stop (EV_A_ &fs_w);
2672 close (fs_fd); 4928 close (fs_fd);
2673 fs_fd = inotify_init (); 4929 fs_fd = infy_newfd ();
2674 4930
4931 if (fs_fd >= 0)
4932 {
4933 fd_intern (fs_fd);
4934 ev_io_set (&fs_w, fs_fd, EV_READ);
4935 ev_io_start (EV_A_ &fs_w);
4936 ev_unref (EV_A);
4937 }
4938
2675 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4939 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2676 { 4940 {
2677 WL w_ = fs_hash [slot].head; 4941 WL w_ = fs_hash [slot].head;
2678 fs_hash [slot].head = 0; 4942 fs_hash [slot].head = 0;
2679 4943
2680 while (w_) 4944 while (w_)
… …
2685 w->wd = -1; 4949 w->wd = -1;
2686 4950
2687 if (fs_fd >= 0) 4951 if (fs_fd >= 0)
2688 infy_add (EV_A_ w); /* re-add, no matter what */ 4952 infy_add (EV_A_ w); /* re-add, no matter what */
2689 else 4953 else
4954 {
4955 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4956 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2690 ev_timer_again (EV_A_ &w->timer); 4957 ev_timer_again (EV_A_ &w->timer);
4958 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4959 }
2691 } 4960 }
2692 } 4961 }
2693} 4962}
2694 4963
2695#endif 4964#endif
… …
2699#else 4968#else
2700# define EV_LSTAT(p,b) lstat (p, b) 4969# define EV_LSTAT(p,b) lstat (p, b)
2701#endif 4970#endif
2702 4971
2703void 4972void
2704ev_stat_stat (EV_P_ ev_stat *w) 4973ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
2705{ 4974{
2706 if (lstat (w->path, &w->attr) < 0) 4975 if (lstat (w->path, &w->attr) < 0)
2707 w->attr.st_nlink = 0; 4976 w->attr.st_nlink = 0;
2708 else if (!w->attr.st_nlink) 4977 else if (!w->attr.st_nlink)
2709 w->attr.st_nlink = 1; 4978 w->attr.st_nlink = 1;
2710} 4979}
2711 4980
2712static void noinline 4981ecb_noinline
4982static void
2713stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4983stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2714{ 4984{
2715 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4985 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2716 4986
2717 /* we copy this here each the time so that */ 4987 ev_statdata prev = w->attr;
2718 /* prev has the old value when the callback gets invoked */
2719 w->prev = w->attr;
2720 ev_stat_stat (EV_A_ w); 4988 ev_stat_stat (EV_A_ w);
2721 4989
2722 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4990 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2723 if ( 4991 if (
2724 w->prev.st_dev != w->attr.st_dev 4992 prev.st_dev != w->attr.st_dev
2725 || w->prev.st_ino != w->attr.st_ino 4993 || prev.st_ino != w->attr.st_ino
2726 || w->prev.st_mode != w->attr.st_mode 4994 || prev.st_mode != w->attr.st_mode
2727 || w->prev.st_nlink != w->attr.st_nlink 4995 || prev.st_nlink != w->attr.st_nlink
2728 || w->prev.st_uid != w->attr.st_uid 4996 || prev.st_uid != w->attr.st_uid
2729 || w->prev.st_gid != w->attr.st_gid 4997 || prev.st_gid != w->attr.st_gid
2730 || w->prev.st_rdev != w->attr.st_rdev 4998 || prev.st_rdev != w->attr.st_rdev
2731 || w->prev.st_size != w->attr.st_size 4999 || prev.st_size != w->attr.st_size
2732 || w->prev.st_atime != w->attr.st_atime 5000 || prev.st_atime != w->attr.st_atime
2733 || w->prev.st_mtime != w->attr.st_mtime 5001 || prev.st_mtime != w->attr.st_mtime
2734 || w->prev.st_ctime != w->attr.st_ctime 5002 || prev.st_ctime != w->attr.st_ctime
2735 ) { 5003 ) {
5004 /* we only update w->prev on actual differences */
5005 /* in case we test more often than invoke the callback, */
5006 /* to ensure that prev is always different to attr */
5007 w->prev = prev;
5008
2736 #if EV_USE_INOTIFY 5009 #if EV_USE_INOTIFY
2737 if (fs_fd >= 0) 5010 if (fs_fd >= 0)
2738 { 5011 {
2739 infy_del (EV_A_ w); 5012 infy_del (EV_A_ w);
2740 infy_add (EV_A_ w); 5013 infy_add (EV_A_ w);
… …
2745 ev_feed_event (EV_A_ w, EV_STAT); 5018 ev_feed_event (EV_A_ w, EV_STAT);
2746 } 5019 }
2747} 5020}
2748 5021
2749void 5022void
2750ev_stat_start (EV_P_ ev_stat *w) 5023ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
2751{ 5024{
2752 if (expect_false (ev_is_active (w))) 5025 if (ecb_expect_false (ev_is_active (w)))
2753 return; 5026 return;
2754 5027
2755 ev_stat_stat (EV_A_ w); 5028 ev_stat_stat (EV_A_ w);
2756 5029
2757 if (w->interval < MIN_STAT_INTERVAL && w->interval) 5030 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
2765 5038
2766 if (fs_fd >= 0) 5039 if (fs_fd >= 0)
2767 infy_add (EV_A_ w); 5040 infy_add (EV_A_ w);
2768 else 5041 else
2769#endif 5042#endif
5043 {
2770 ev_timer_again (EV_A_ &w->timer); 5044 ev_timer_again (EV_A_ &w->timer);
5045 ev_unref (EV_A);
5046 }
2771 5047
2772 ev_start (EV_A_ (W)w, 1); 5048 ev_start (EV_A_ (W)w, 1);
2773 5049
2774 EV_FREQUENT_CHECK; 5050 EV_FREQUENT_CHECK;
2775} 5051}
2776 5052
2777void 5053void
2778ev_stat_stop (EV_P_ ev_stat *w) 5054ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
2779{ 5055{
2780 clear_pending (EV_A_ (W)w); 5056 clear_pending (EV_A_ (W)w);
2781 if (expect_false (!ev_is_active (w))) 5057 if (ecb_expect_false (!ev_is_active (w)))
2782 return; 5058 return;
2783 5059
2784 EV_FREQUENT_CHECK; 5060 EV_FREQUENT_CHECK;
2785 5061
2786#if EV_USE_INOTIFY 5062#if EV_USE_INOTIFY
2787 infy_del (EV_A_ w); 5063 infy_del (EV_A_ w);
2788#endif 5064#endif
5065
5066 if (ev_is_active (&w->timer))
5067 {
5068 ev_ref (EV_A);
2789 ev_timer_stop (EV_A_ &w->timer); 5069 ev_timer_stop (EV_A_ &w->timer);
5070 }
2790 5071
2791 ev_stop (EV_A_ (W)w); 5072 ev_stop (EV_A_ (W)w);
2792 5073
2793 EV_FREQUENT_CHECK; 5074 EV_FREQUENT_CHECK;
2794} 5075}
2795#endif 5076#endif
2796 5077
2797#if EV_IDLE_ENABLE 5078#if EV_IDLE_ENABLE
2798void 5079void
2799ev_idle_start (EV_P_ ev_idle *w) 5080ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
2800{ 5081{
2801 if (expect_false (ev_is_active (w))) 5082 if (ecb_expect_false (ev_is_active (w)))
2802 return; 5083 return;
2803 5084
2804 pri_adjust (EV_A_ (W)w); 5085 pri_adjust (EV_A_ (W)w);
2805 5086
2806 EV_FREQUENT_CHECK; 5087 EV_FREQUENT_CHECK;
… …
2809 int active = ++idlecnt [ABSPRI (w)]; 5090 int active = ++idlecnt [ABSPRI (w)];
2810 5091
2811 ++idleall; 5092 ++idleall;
2812 ev_start (EV_A_ (W)w, active); 5093 ev_start (EV_A_ (W)w, active);
2813 5094
2814 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 5095 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
2815 idles [ABSPRI (w)][active - 1] = w; 5096 idles [ABSPRI (w)][active - 1] = w;
2816 } 5097 }
2817 5098
2818 EV_FREQUENT_CHECK; 5099 EV_FREQUENT_CHECK;
2819} 5100}
2820 5101
2821void 5102void
2822ev_idle_stop (EV_P_ ev_idle *w) 5103ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
2823{ 5104{
2824 clear_pending (EV_A_ (W)w); 5105 clear_pending (EV_A_ (W)w);
2825 if (expect_false (!ev_is_active (w))) 5106 if (ecb_expect_false (!ev_is_active (w)))
2826 return; 5107 return;
2827 5108
2828 EV_FREQUENT_CHECK; 5109 EV_FREQUENT_CHECK;
2829 5110
2830 { 5111 {
… …
2839 5120
2840 EV_FREQUENT_CHECK; 5121 EV_FREQUENT_CHECK;
2841} 5122}
2842#endif 5123#endif
2843 5124
5125#if EV_PREPARE_ENABLE
2844void 5126void
2845ev_prepare_start (EV_P_ ev_prepare *w) 5127ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
2846{ 5128{
2847 if (expect_false (ev_is_active (w))) 5129 if (ecb_expect_false (ev_is_active (w)))
2848 return; 5130 return;
2849 5131
2850 EV_FREQUENT_CHECK; 5132 EV_FREQUENT_CHECK;
2851 5133
2852 ev_start (EV_A_ (W)w, ++preparecnt); 5134 ev_start (EV_A_ (W)w, ++preparecnt);
2853 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 5135 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
2854 prepares [preparecnt - 1] = w; 5136 prepares [preparecnt - 1] = w;
2855 5137
2856 EV_FREQUENT_CHECK; 5138 EV_FREQUENT_CHECK;
2857} 5139}
2858 5140
2859void 5141void
2860ev_prepare_stop (EV_P_ ev_prepare *w) 5142ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
2861{ 5143{
2862 clear_pending (EV_A_ (W)w); 5144 clear_pending (EV_A_ (W)w);
2863 if (expect_false (!ev_is_active (w))) 5145 if (ecb_expect_false (!ev_is_active (w)))
2864 return; 5146 return;
2865 5147
2866 EV_FREQUENT_CHECK; 5148 EV_FREQUENT_CHECK;
2867 5149
2868 { 5150 {
… …
2874 5156
2875 ev_stop (EV_A_ (W)w); 5157 ev_stop (EV_A_ (W)w);
2876 5158
2877 EV_FREQUENT_CHECK; 5159 EV_FREQUENT_CHECK;
2878} 5160}
5161#endif
2879 5162
5163#if EV_CHECK_ENABLE
2880void 5164void
2881ev_check_start (EV_P_ ev_check *w) 5165ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
2882{ 5166{
2883 if (expect_false (ev_is_active (w))) 5167 if (ecb_expect_false (ev_is_active (w)))
2884 return; 5168 return;
2885 5169
2886 EV_FREQUENT_CHECK; 5170 EV_FREQUENT_CHECK;
2887 5171
2888 ev_start (EV_A_ (W)w, ++checkcnt); 5172 ev_start (EV_A_ (W)w, ++checkcnt);
2889 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 5173 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
2890 checks [checkcnt - 1] = w; 5174 checks [checkcnt - 1] = w;
2891 5175
2892 EV_FREQUENT_CHECK; 5176 EV_FREQUENT_CHECK;
2893} 5177}
2894 5178
2895void 5179void
2896ev_check_stop (EV_P_ ev_check *w) 5180ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
2897{ 5181{
2898 clear_pending (EV_A_ (W)w); 5182 clear_pending (EV_A_ (W)w);
2899 if (expect_false (!ev_is_active (w))) 5183 if (ecb_expect_false (!ev_is_active (w)))
2900 return; 5184 return;
2901 5185
2902 EV_FREQUENT_CHECK; 5186 EV_FREQUENT_CHECK;
2903 5187
2904 { 5188 {
… …
2910 5194
2911 ev_stop (EV_A_ (W)w); 5195 ev_stop (EV_A_ (W)w);
2912 5196
2913 EV_FREQUENT_CHECK; 5197 EV_FREQUENT_CHECK;
2914} 5198}
5199#endif
2915 5200
2916#if EV_EMBED_ENABLE 5201#if EV_EMBED_ENABLE
2917void noinline 5202ecb_noinline
5203void
2918ev_embed_sweep (EV_P_ ev_embed *w) 5204ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
2919{ 5205{
2920 ev_loop (w->other, EVLOOP_NONBLOCK); 5206 ev_run (w->other, EVRUN_NOWAIT);
2921} 5207}
2922 5208
2923static void 5209static void
2924embed_io_cb (EV_P_ ev_io *io, int revents) 5210embed_io_cb (EV_P_ ev_io *io, int revents)
2925{ 5211{
2926 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 5212 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2927 5213
2928 if (ev_cb (w)) 5214 if (ev_cb (w))
2929 ev_feed_event (EV_A_ (W)w, EV_EMBED); 5215 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2930 else 5216 else
2931 ev_loop (w->other, EVLOOP_NONBLOCK); 5217 ev_run (w->other, EVRUN_NOWAIT);
2932} 5218}
2933 5219
2934static void 5220static void
2935embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 5221embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2936{ 5222{
2937 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 5223 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2938 5224
2939 { 5225 {
2940 struct ev_loop *loop = w->other; 5226 EV_P = w->other;
2941 5227
2942 while (fdchangecnt) 5228 while (fdchangecnt)
2943 { 5229 {
2944 fd_reify (EV_A); 5230 fd_reify (EV_A);
2945 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5231 ev_run (EV_A_ EVRUN_NOWAIT);
2946 } 5232 }
2947 } 5233 }
2948} 5234}
2949 5235
5236#if EV_FORK_ENABLE
2950static void 5237static void
2951embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5238embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2952{ 5239{
2953 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 5240 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2954 5241
2955 ev_embed_stop (EV_A_ w); 5242 ev_embed_stop (EV_A_ w);
2956 5243
2957 { 5244 {
2958 struct ev_loop *loop = w->other; 5245 EV_P = w->other;
2959 5246
2960 ev_loop_fork (EV_A); 5247 ev_loop_fork (EV_A);
2961 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5248 ev_run (EV_A_ EVRUN_NOWAIT);
2962 } 5249 }
2963 5250
2964 ev_embed_start (EV_A_ w); 5251 ev_embed_start (EV_A_ w);
2965} 5252}
5253#endif
2966 5254
2967#if 0 5255#if 0
2968static void 5256static void
2969embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5257embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2970{ 5258{
2971 ev_idle_stop (EV_A_ idle); 5259 ev_idle_stop (EV_A_ idle);
2972} 5260}
2973#endif 5261#endif
2974 5262
2975void 5263void
2976ev_embed_start (EV_P_ ev_embed *w) 5264ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
2977{ 5265{
2978 if (expect_false (ev_is_active (w))) 5266 if (ecb_expect_false (ev_is_active (w)))
2979 return; 5267 return;
2980 5268
2981 { 5269 {
2982 struct ev_loop *loop = w->other; 5270 EV_P = w->other;
2983 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 5271 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2984 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 5272 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2985 } 5273 }
2986 5274
2987 EV_FREQUENT_CHECK; 5275 EV_FREQUENT_CHECK;
… …
2991 5279
2992 ev_prepare_init (&w->prepare, embed_prepare_cb); 5280 ev_prepare_init (&w->prepare, embed_prepare_cb);
2993 ev_set_priority (&w->prepare, EV_MINPRI); 5281 ev_set_priority (&w->prepare, EV_MINPRI);
2994 ev_prepare_start (EV_A_ &w->prepare); 5282 ev_prepare_start (EV_A_ &w->prepare);
2995 5283
5284#if EV_FORK_ENABLE
2996 ev_fork_init (&w->fork, embed_fork_cb); 5285 ev_fork_init (&w->fork, embed_fork_cb);
2997 ev_fork_start (EV_A_ &w->fork); 5286 ev_fork_start (EV_A_ &w->fork);
5287#endif
2998 5288
2999 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5289 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3000 5290
3001 ev_start (EV_A_ (W)w, 1); 5291 ev_start (EV_A_ (W)w, 1);
3002 5292
3003 EV_FREQUENT_CHECK; 5293 EV_FREQUENT_CHECK;
3004} 5294}
3005 5295
3006void 5296void
3007ev_embed_stop (EV_P_ ev_embed *w) 5297ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3008{ 5298{
3009 clear_pending (EV_A_ (W)w); 5299 clear_pending (EV_A_ (W)w);
3010 if (expect_false (!ev_is_active (w))) 5300 if (ecb_expect_false (!ev_is_active (w)))
3011 return; 5301 return;
3012 5302
3013 EV_FREQUENT_CHECK; 5303 EV_FREQUENT_CHECK;
3014 5304
3015 ev_io_stop (EV_A_ &w->io); 5305 ev_io_stop (EV_A_ &w->io);
3016 ev_prepare_stop (EV_A_ &w->prepare); 5306 ev_prepare_stop (EV_A_ &w->prepare);
5307#if EV_FORK_ENABLE
3017 ev_fork_stop (EV_A_ &w->fork); 5308 ev_fork_stop (EV_A_ &w->fork);
5309#endif
5310
5311 ev_stop (EV_A_ (W)w);
3018 5312
3019 EV_FREQUENT_CHECK; 5313 EV_FREQUENT_CHECK;
3020} 5314}
3021#endif 5315#endif
3022 5316
3023#if EV_FORK_ENABLE 5317#if EV_FORK_ENABLE
3024void 5318void
3025ev_fork_start (EV_P_ ev_fork *w) 5319ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3026{ 5320{
3027 if (expect_false (ev_is_active (w))) 5321 if (ecb_expect_false (ev_is_active (w)))
3028 return; 5322 return;
3029 5323
3030 EV_FREQUENT_CHECK; 5324 EV_FREQUENT_CHECK;
3031 5325
3032 ev_start (EV_A_ (W)w, ++forkcnt); 5326 ev_start (EV_A_ (W)w, ++forkcnt);
3033 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5327 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3034 forks [forkcnt - 1] = w; 5328 forks [forkcnt - 1] = w;
3035 5329
3036 EV_FREQUENT_CHECK; 5330 EV_FREQUENT_CHECK;
3037} 5331}
3038 5332
3039void 5333void
3040ev_fork_stop (EV_P_ ev_fork *w) 5334ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3041{ 5335{
3042 clear_pending (EV_A_ (W)w); 5336 clear_pending (EV_A_ (W)w);
3043 if (expect_false (!ev_is_active (w))) 5337 if (ecb_expect_false (!ev_is_active (w)))
3044 return; 5338 return;
3045 5339
3046 EV_FREQUENT_CHECK; 5340 EV_FREQUENT_CHECK;
3047 5341
3048 { 5342 {
… …
3056 5350
3057 EV_FREQUENT_CHECK; 5351 EV_FREQUENT_CHECK;
3058} 5352}
3059#endif 5353#endif
3060 5354
5355#if EV_CLEANUP_ENABLE
5356void
5357ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5358{
5359 if (ecb_expect_false (ev_is_active (w)))
5360 return;
5361
5362 EV_FREQUENT_CHECK;
5363
5364 ev_start (EV_A_ (W)w, ++cleanupcnt);
5365 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5366 cleanups [cleanupcnt - 1] = w;
5367
5368 /* cleanup watchers should never keep a refcount on the loop */
5369 ev_unref (EV_A);
5370 EV_FREQUENT_CHECK;
5371}
5372
5373void
5374ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5375{
5376 clear_pending (EV_A_ (W)w);
5377 if (ecb_expect_false (!ev_is_active (w)))
5378 return;
5379
5380 EV_FREQUENT_CHECK;
5381 ev_ref (EV_A);
5382
5383 {
5384 int active = ev_active (w);
5385
5386 cleanups [active - 1] = cleanups [--cleanupcnt];
5387 ev_active (cleanups [active - 1]) = active;
5388 }
5389
5390 ev_stop (EV_A_ (W)w);
5391
5392 EV_FREQUENT_CHECK;
5393}
5394#endif
5395
3061#if EV_ASYNC_ENABLE 5396#if EV_ASYNC_ENABLE
3062void 5397void
3063ev_async_start (EV_P_ ev_async *w) 5398ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3064{ 5399{
3065 if (expect_false (ev_is_active (w))) 5400 if (ecb_expect_false (ev_is_active (w)))
3066 return; 5401 return;
3067 5402
5403 w->sent = 0;
5404
3068 evpipe_init (EV_A); 5405 evpipe_init (EV_A);
3069 5406
3070 EV_FREQUENT_CHECK; 5407 EV_FREQUENT_CHECK;
3071 5408
3072 ev_start (EV_A_ (W)w, ++asynccnt); 5409 ev_start (EV_A_ (W)w, ++asynccnt);
3073 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5410 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3074 asyncs [asynccnt - 1] = w; 5411 asyncs [asynccnt - 1] = w;
3075 5412
3076 EV_FREQUENT_CHECK; 5413 EV_FREQUENT_CHECK;
3077} 5414}
3078 5415
3079void 5416void
3080ev_async_stop (EV_P_ ev_async *w) 5417ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3081{ 5418{
3082 clear_pending (EV_A_ (W)w); 5419 clear_pending (EV_A_ (W)w);
3083 if (expect_false (!ev_is_active (w))) 5420 if (ecb_expect_false (!ev_is_active (w)))
3084 return; 5421 return;
3085 5422
3086 EV_FREQUENT_CHECK; 5423 EV_FREQUENT_CHECK;
3087 5424
3088 { 5425 {
… …
3096 5433
3097 EV_FREQUENT_CHECK; 5434 EV_FREQUENT_CHECK;
3098} 5435}
3099 5436
3100void 5437void
3101ev_async_send (EV_P_ ev_async *w) 5438ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3102{ 5439{
3103 w->sent = 1; 5440 w->sent = 1;
3104 evpipe_write (EV_A_ &gotasync); 5441 evpipe_write (EV_A_ &async_pending);
3105} 5442}
3106#endif 5443#endif
3107 5444
3108/*****************************************************************************/ 5445/*****************************************************************************/
3109 5446
… …
3143 5480
3144 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5481 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3145} 5482}
3146 5483
3147void 5484void
3148ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5485ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3149{ 5486{
3150 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5487 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3151
3152 if (expect_false (!once))
3153 {
3154 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3155 return;
3156 }
3157 5488
3158 once->cb = cb; 5489 once->cb = cb;
3159 once->arg = arg; 5490 once->arg = arg;
3160 5491
3161 ev_init (&once->io, once_cb_io); 5492 ev_init (&once->io, once_cb_io);
… …
3173 } 5504 }
3174} 5505}
3175 5506
3176/*****************************************************************************/ 5507/*****************************************************************************/
3177 5508
3178#if 0 5509#if EV_WALK_ENABLE
5510ecb_cold
3179void 5511void
3180ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5512ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3181{ 5513{
3182 int i, j; 5514 int i, j;
3183 ev_watcher_list *wl, *wn; 5515 ev_watcher_list *wl, *wn;
3184 5516
3185 if (types & (EV_IO | EV_EMBED)) 5517 if (types & (EV_IO | EV_EMBED))
… …
3199#if EV_USE_INOTIFY 5531#if EV_USE_INOTIFY
3200 if (ev_cb ((ev_io *)wl) == infy_cb) 5532 if (ev_cb ((ev_io *)wl) == infy_cb)
3201 ; 5533 ;
3202 else 5534 else
3203#endif 5535#endif
3204 if ((ev_io *)wl != &pipeev) 5536 if ((ev_io *)wl != &pipe_w)
3205 if (types & EV_IO) 5537 if (types & EV_IO)
3206 cb (EV_A_ EV_IO, wl); 5538 cb (EV_A_ EV_IO, wl);
3207 5539
3208 wl = wn; 5540 wl = wn;
3209 } 5541 }
… …
3228 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5560 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3229#endif 5561#endif
3230 5562
3231#if EV_IDLE_ENABLE 5563#if EV_IDLE_ENABLE
3232 if (types & EV_IDLE) 5564 if (types & EV_IDLE)
3233 for (j = NUMPRI; i--; ) 5565 for (j = NUMPRI; j--; )
3234 for (i = idlecnt [j]; i--; ) 5566 for (i = idlecnt [j]; i--; )
3235 cb (EV_A_ EV_IDLE, idles [j][i]); 5567 cb (EV_A_ EV_IDLE, idles [j][i]);
3236#endif 5568#endif
3237 5569
3238#if EV_FORK_ENABLE 5570#if EV_FORK_ENABLE
… …
3246 if (types & EV_ASYNC) 5578 if (types & EV_ASYNC)
3247 for (i = asynccnt; i--; ) 5579 for (i = asynccnt; i--; )
3248 cb (EV_A_ EV_ASYNC, asyncs [i]); 5580 cb (EV_A_ EV_ASYNC, asyncs [i]);
3249#endif 5581#endif
3250 5582
5583#if EV_PREPARE_ENABLE
3251 if (types & EV_PREPARE) 5584 if (types & EV_PREPARE)
3252 for (i = preparecnt; i--; ) 5585 for (i = preparecnt; i--; )
3253#if EV_EMBED_ENABLE 5586# if EV_EMBED_ENABLE
3254 if (ev_cb (prepares [i]) != embed_prepare_cb) 5587 if (ev_cb (prepares [i]) != embed_prepare_cb)
3255#endif 5588# endif
3256 cb (EV_A_ EV_PREPARE, prepares [i]); 5589 cb (EV_A_ EV_PREPARE, prepares [i]);
5590#endif
3257 5591
5592#if EV_CHECK_ENABLE
3258 if (types & EV_CHECK) 5593 if (types & EV_CHECK)
3259 for (i = checkcnt; i--; ) 5594 for (i = checkcnt; i--; )
3260 cb (EV_A_ EV_CHECK, checks [i]); 5595 cb (EV_A_ EV_CHECK, checks [i]);
5596#endif
3261 5597
5598#if EV_SIGNAL_ENABLE
3262 if (types & EV_SIGNAL) 5599 if (types & EV_SIGNAL)
3263 for (i = 0; i < signalmax; ++i) 5600 for (i = 0; i < EV_NSIG - 1; ++i)
3264 for (wl = signals [i].head; wl; ) 5601 for (wl = signals [i].head; wl; )
3265 { 5602 {
3266 wn = wl->next; 5603 wn = wl->next;
3267 cb (EV_A_ EV_SIGNAL, wl); 5604 cb (EV_A_ EV_SIGNAL, wl);
3268 wl = wn; 5605 wl = wn;
3269 } 5606 }
5607#endif
3270 5608
5609#if EV_CHILD_ENABLE
3271 if (types & EV_CHILD) 5610 if (types & EV_CHILD)
3272 for (i = EV_PID_HASHSIZE; i--; ) 5611 for (i = (EV_PID_HASHSIZE); i--; )
3273 for (wl = childs [i]; wl; ) 5612 for (wl = childs [i]; wl; )
3274 { 5613 {
3275 wn = wl->next; 5614 wn = wl->next;
3276 cb (EV_A_ EV_CHILD, wl); 5615 cb (EV_A_ EV_CHILD, wl);
3277 wl = wn; 5616 wl = wn;
3278 } 5617 }
5618#endif
3279/* EV_STAT 0x00001000 /* stat data changed */ 5619/* EV_STAT 0x00001000 /* stat data changed */
3280/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 5620/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3281} 5621}
3282#endif 5622#endif
3283 5623
3284#if EV_MULTIPLICITY 5624#if EV_MULTIPLICITY
3285 #include "ev_wrap.h" 5625 #include "ev_wrap.h"
3286#endif 5626#endif
3287 5627
3288#ifdef __cplusplus
3289}
3290#endif
3291

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