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Comparing libev/ev.c (file contents):
Revision 1.298 by root, Fri Jul 10 19:10:19 2009 UTC vs.
Revision 1.524 by root, Wed Jan 22 02:20:47 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) 2007-2019 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
62# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
63# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
64# endif 66# endif
65 67
66# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
77# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
79# endif 81# endif
80# endif 82# endif
81 83
84# if HAVE_NANOSLEEP
82# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
85# else 88# else
89# undef EV_USE_NANOSLEEP
86# 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
87# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
88# endif 100# endif
89 101
102# if HAVE_POLL && HAVE_POLL_H
90# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
91# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif 105# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL 1
101# else 106# else
107# undef EV_USE_POLL
102# define EV_USE_POLL 0 108# define EV_USE_POLL 0
103# endif
104# endif 109# endif
105 110
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
109# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
110# define EV_USE_EPOLL 0
111# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
112# endif 118# endif
113 119
114# ifndef EV_USE_KQUEUE 120# if HAVE_LINUX_AIO_ABI_H
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 121# ifndef EV_USE_LINUXAIO
116# define EV_USE_KQUEUE 1 122# define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */
117# else
118# define EV_USE_KQUEUE 0
119# endif 123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
120# endif 127# endif
121 128
129# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
122# ifndef EV_USE_PORT 130# ifndef EV_USE_IOURING
123# if HAVE_PORT_H && HAVE_PORT_CREATE 131# define EV_USE_IOURING EV_FEATURE_BACKENDS
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif 132# endif
128# endif
129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else 133# else
134# undef EV_USE_IOURING
134# define EV_USE_INOTIFY 0 135# define EV_USE_IOURING 0
135# endif
136# endif
137
138# ifndef EV_USE_EVENTFD
139# if HAVE_EVENTFD
140# define EV_USE_EVENTFD 1
141# else
142# define EV_USE_EVENTFD 0
143# endif
144# endif 136# endif
145 137
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
146#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
147 155
148#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
149#include <stdlib.h> 204#include <stdlib.h>
205#include <string.h>
150#include <fcntl.h> 206#include <fcntl.h>
151#include <stddef.h> 207#include <stddef.h>
152 208
153#include <stdio.h> 209#include <stdio.h>
154 210
155#include <assert.h> 211#include <assert.h>
156#include <errno.h> 212#include <errno.h>
157#include <sys/types.h> 213#include <sys/types.h>
158#include <time.h> 214#include <time.h>
215#include <limits.h>
159 216
160#include <signal.h> 217#include <signal.h>
161 218
162#ifdef EV_H 219#ifdef EV_H
163# include EV_H 220# include EV_H
164#else 221#else
165# 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
166#endif 234#endif
167 235
168#ifndef _WIN32 236#ifndef _WIN32
169# include <sys/time.h> 237# include <sys/time.h>
170# include <sys/wait.h> 238# include <sys/wait.h>
171# include <unistd.h> 239# include <unistd.h>
172#else 240#else
173# include <io.h> 241# include <io.h>
174# define WIN32_LEAN_AND_MEAN 242# define WIN32_LEAN_AND_MEAN
243# include <winsock2.h>
175# include <windows.h> 244# include <windows.h>
176# ifndef EV_SELECT_IS_WINSOCKET 245# ifndef EV_SELECT_IS_WINSOCKET
177# define EV_SELECT_IS_WINSOCKET 1 246# define EV_SELECT_IS_WINSOCKET 1
178# endif 247# endif
248# undef EV_AVOID_STDIO
179#endif 249#endif
180 250
181/* 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 */
182 252
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
183#ifndef EV_USE_CLOCK_SYSCALL 282#ifndef EV_USE_CLOCK_SYSCALL
184# if __linux && __GLIBC__ >= 2 283# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
185# define EV_USE_CLOCK_SYSCALL 1 284# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
186# else 285# else
187# define EV_USE_CLOCK_SYSCALL 0 286# define EV_USE_CLOCK_SYSCALL 0
188# endif 287# endif
189#endif 288#endif
190 289
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
191#ifndef EV_USE_MONOTONIC 299#ifndef EV_USE_MONOTONIC
192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 300# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
193# define EV_USE_MONOTONIC 1 301# define EV_USE_MONOTONIC EV_FEATURE_OS
194# else 302# else
195# define EV_USE_MONOTONIC 0 303# define EV_USE_MONOTONIC 0
196# endif 304# endif
197#endif 305#endif
198 306
… …
200# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 308# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
201#endif 309#endif
202 310
203#ifndef EV_USE_NANOSLEEP 311#ifndef EV_USE_NANOSLEEP
204# if _POSIX_C_SOURCE >= 199309L 312# if _POSIX_C_SOURCE >= 199309L
205# define EV_USE_NANOSLEEP 1 313# define EV_USE_NANOSLEEP EV_FEATURE_OS
206# else 314# else
207# define EV_USE_NANOSLEEP 0 315# define EV_USE_NANOSLEEP 0
208# endif 316# endif
209#endif 317#endif
210 318
211#ifndef EV_USE_SELECT 319#ifndef EV_USE_SELECT
212# define EV_USE_SELECT 1 320# define EV_USE_SELECT EV_FEATURE_BACKENDS
213#endif 321#endif
214 322
215#ifndef EV_USE_POLL 323#ifndef EV_USE_POLL
216# ifdef _WIN32 324# ifdef _WIN32
217# define EV_USE_POLL 0 325# define EV_USE_POLL 0
218# else 326# else
219# define EV_USE_POLL 1 327# define EV_USE_POLL EV_FEATURE_BACKENDS
220# endif 328# endif
221#endif 329#endif
222 330
223#ifndef EV_USE_EPOLL 331#ifndef EV_USE_EPOLL
224# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 332# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
225# define EV_USE_EPOLL 1 333# define EV_USE_EPOLL EV_FEATURE_BACKENDS
226# else 334# else
227# define EV_USE_EPOLL 0 335# define EV_USE_EPOLL 0
228# endif 336# endif
229#endif 337#endif
230 338
… …
234 342
235#ifndef EV_USE_PORT 343#ifndef EV_USE_PORT
236# define EV_USE_PORT 0 344# define EV_USE_PORT 0
237#endif 345#endif
238 346
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
239#ifndef EV_USE_INOTIFY 363#ifndef EV_USE_INOTIFY
240# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 364# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
241# define EV_USE_INOTIFY 1 365# define EV_USE_INOTIFY EV_FEATURE_OS
242# else 366# else
243# define EV_USE_INOTIFY 0 367# define EV_USE_INOTIFY 0
244# endif 368# endif
245#endif 369#endif
246 370
247#ifndef EV_PID_HASHSIZE 371#ifndef EV_PID_HASHSIZE
248# if EV_MINIMAL 372# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
249# define EV_PID_HASHSIZE 1
250# else
251# define EV_PID_HASHSIZE 16
252# endif
253#endif 373#endif
254 374
255#ifndef EV_INOTIFY_HASHSIZE 375#ifndef EV_INOTIFY_HASHSIZE
256# if EV_MINIMAL 376# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
257# define EV_INOTIFY_HASHSIZE 1
258# else
259# define EV_INOTIFY_HASHSIZE 16
260# endif
261#endif 377#endif
262 378
263#ifndef EV_USE_EVENTFD 379#ifndef EV_USE_EVENTFD
264# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 380# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265# define EV_USE_EVENTFD 1 381# define EV_USE_EVENTFD EV_FEATURE_OS
266# else 382# else
267# 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
268# endif 400# endif
269#endif 401#endif
270 402
271#if 0 /* debugging */ 403#if 0 /* debugging */
272# define EV_VERIFY 3 404# define EV_VERIFY 3
273# define EV_USE_4HEAP 1 405# define EV_USE_4HEAP 1
274# define EV_HEAP_CACHE_AT 1 406# define EV_HEAP_CACHE_AT 1
275#endif 407#endif
276 408
277#ifndef EV_VERIFY 409#ifndef EV_VERIFY
278# define EV_VERIFY !EV_MINIMAL 410# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
279#endif 411#endif
280 412
281#ifndef EV_USE_4HEAP 413#ifndef EV_USE_4HEAP
282# define EV_USE_4HEAP !EV_MINIMAL 414# define EV_USE_4HEAP EV_FEATURE_DATA
283#endif 415#endif
284 416
285#ifndef EV_HEAP_CACHE_AT 417#ifndef EV_HEAP_CACHE_AT
286# 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
287#endif 435#endif
288 436
289/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 437/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
290/* which makes programs even slower. might work on other unices, too. */ 438/* which makes programs even slower. might work on other unices, too. */
291#if EV_USE_CLOCK_SYSCALL 439#if EV_USE_CLOCK_SYSCALL
292# include <syscall.h> 440# include <sys/syscall.h>
293# ifdef SYS_clock_gettime 441# ifdef SYS_clock_gettime
294# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 442# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
295# undef EV_USE_MONOTONIC 443# undef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 1 444# define EV_USE_MONOTONIC 1
445# define EV_NEED_SYSCALL 1
297# else 446# else
298# undef EV_USE_CLOCK_SYSCALL 447# undef EV_USE_CLOCK_SYSCALL
299# define EV_USE_CLOCK_SYSCALL 0 448# define EV_USE_CLOCK_SYSCALL 0
300# endif 449# endif
301#endif 450#endif
… …
315#if !EV_STAT_ENABLE 464#if !EV_STAT_ENABLE
316# undef EV_USE_INOTIFY 465# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0 466# define EV_USE_INOTIFY 0
318#endif 467#endif
319 468
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
320#if !EV_USE_NANOSLEEP 477#if !EV_USE_NANOSLEEP
321# ifndef _WIN32 478/* hp-ux has it in sys/time.h, which we unconditionally include above */
479# if !defined _WIN32 && !defined __hpux
322# include <sys/select.h> 480# include <sys/select.h>
323# endif 481# endif
324#endif 482#endif
325 483
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
326#if EV_USE_INOTIFY 509#if EV_USE_INOTIFY
327# include <sys/utsname.h>
328# include <sys/statfs.h> 510# include <sys/statfs.h>
329# include <sys/inotify.h> 511# include <sys/inotify.h>
330/* 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 */
331# ifndef IN_DONT_FOLLOW 513# ifndef IN_DONT_FOLLOW
332# undef EV_USE_INOTIFY 514# undef EV_USE_INOTIFY
333# define EV_USE_INOTIFY 0 515# define EV_USE_INOTIFY 0
334# endif 516# endif
335#endif 517#endif
336 518
337#if EV_SELECT_IS_WINSOCKET
338# include <winsock.h>
339#endif
340
341#if EV_USE_EVENTFD 519#if EV_USE_EVENTFD
342/* 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 */
343# include <stdint.h> 521# include <stdint.h>
344# ifdef __cplusplus 522# ifndef EFD_NONBLOCK
345extern "C" { 523# define EFD_NONBLOCK O_NONBLOCK
346# endif 524# endif
347int eventfd (unsigned int initval, int flags); 525# ifndef EFD_CLOEXEC
348# ifdef __cplusplus 526# ifdef O_CLOEXEC
349} 527# define EFD_CLOEXEC O_CLOEXEC
528# else
529# define EFD_CLOEXEC 02000000
530# endif
350# 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
351#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);
352 549
353/**/ 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/*****************************************************************************/
354 568
355#if EV_VERIFY >= 3 569#if EV_VERIFY >= 3
356# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 570# define EV_FREQUENT_CHECK ev_verify (EV_A)
357#else 571#else
358# define EV_FREQUENT_CHECK do { } while (0) 572# define EV_FREQUENT_CHECK do { } while (0)
359#endif 573#endif
360 574
361/* 575/*
362 * This is used to avoid floating point rounding problems. 576 * This is used to work around floating point rounding problems.
363 * It is added to ev_rt_now when scheduling periodics
364 * to ensure progress, time-wise, even when rounding
365 * errors are against us.
366 * This value is good at least till the year 4000. 577 * This value is good at least till the year 4000.
367 * Better solutions welcome.
368 */ 578 */
369#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 */
370 581
371#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) */
372#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) */
373/*#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 */
374 585
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 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#ifdef _WIN32
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;
375#if __GNUC__ >= 4 667 #if __GNUC__
376# define expect(expr,value) __builtin_expect ((expr),(value)) 668 typedef signed long long int64_t;
377# 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
378#else 685#else
379# define expect(expr,value) (expr) 686 #include <inttypes.h>
380# define noinline 687 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 688 #define ECB_PTRSIZE 8
382# define inline 689 #else
690 #define ECB_PTRSIZE 4
691 #endif
383# 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
384#endif 702 #endif
703#endif
385 704
386#define expect_false(expr) expect ((expr) != 0, 0) 705/* work around x32 idiocy by defining proper macros */
387#define expect_true(expr) expect ((expr) != 0, 1) 706#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
388#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
389 713
390#if EV_MINIMAL 714/* many compilers define _GNUC_ to some versions but then only implement
391# 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
392#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
393# define inline_speed static inline 1773# define inline_speed ecb_inline
1774#else
1775# define inline_speed ecb_noinline static
394#endif 1776#endif
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/*****************************************************************************/
395 1843
396#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1844#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
397 1845
398#if EV_MINPRI == EV_MAXPRI 1846#if EV_MINPRI == EV_MAXPRI
399# define ABSPRI(w) (((W)w), 0) 1847# define ABSPRI(w) (((W)w), 0)
400#else 1848#else
401# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1849# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
402#endif 1850#endif
403 1851
404#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1852#define EMPTY /* required for microsofts broken pseudo-c compiler */
405#define EMPTY2(a,b) /* used to suppress some warnings */
406 1853
407typedef ev_watcher *W; 1854typedef ev_watcher *W;
408typedef ev_watcher_list *WL; 1855typedef ev_watcher_list *WL;
409typedef ev_watcher_time *WT; 1856typedef ev_watcher_time *WT;
410 1857
411#define ev_active(w) ((W)(w))->active 1858#define ev_active(w) ((W)(w))->active
412#define ev_at(w) ((WT)(w))->at 1859#define ev_at(w) ((WT)(w))->at
413 1860
414#if EV_USE_REALTIME 1861#if EV_USE_REALTIME
415/* 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 */
416/* giving it a reasonably high chance of working on typical architetcures */ 1863/* giving it a reasonably high chance of working on typical architectures */
417static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1864static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
418#endif 1865#endif
419 1866
420#if EV_USE_MONOTONIC 1867#if EV_USE_MONOTONIC
421static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1868static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
422#endif 1869#endif
423 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
424#ifdef _WIN32 1881#ifdef _WIN32
425# include "ev_win32.c" 1882# include "ev_win32.c"
426#endif 1883#endif
427 1884
428/*****************************************************************************/ 1885/*****************************************************************************/
429 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
430static void (*syserr_cb)(const char *msg); 1992static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
431 1993
1994ecb_cold
432void 1995void
433ev_set_syserr_cb (void (*cb)(const char *msg)) 1996ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
434{ 1997{
435 syserr_cb = cb; 1998 syserr_cb = cb;
436} 1999}
437 2000
438static void noinline 2001ecb_noinline ecb_cold
2002static void
439ev_syserr (const char *msg) 2003ev_syserr (const char *msg)
440{ 2004{
441 if (!msg) 2005 if (!msg)
442 msg = "(libev) system error"; 2006 msg = "(libev) system error";
443 2007
444 if (syserr_cb) 2008 if (syserr_cb)
445 syserr_cb (msg); 2009 syserr_cb (msg);
446 else 2010 else
447 { 2011 {
2012#if EV_AVOID_STDIO
2013 ev_printerr (msg);
2014 ev_printerr (": ");
2015 ev_printerr (strerror (errno));
2016 ev_printerr ("\n");
2017#else
448 perror (msg); 2018 perror (msg);
2019#endif
449 abort (); 2020 abort ();
450 } 2021 }
451} 2022}
452 2023
453static void * 2024static void *
454ev_realloc_emul (void *ptr, long size) 2025ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
455{ 2026{
456 /* some systems, notably openbsd and darwin, fail to properly 2027 /* some systems, notably openbsd and darwin, fail to properly
457 * 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
458 * 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.
459 */ 2032 */
460 2033
461 if (size) 2034 if (size)
462 return realloc (ptr, size); 2035 return realloc (ptr, size);
463 2036
464 free (ptr); 2037 free (ptr);
465 return 0; 2038 return 0;
466} 2039}
467 2040
468static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 2041static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
469 2042
2043ecb_cold
470void 2044void
471ev_set_allocator (void *(*cb)(void *ptr, long size)) 2045ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
472{ 2046{
473 alloc = cb; 2047 alloc = cb;
474} 2048}
475 2049
476inline_speed void * 2050inline_speed void *
… …
478{ 2052{
479 ptr = alloc (ptr, size); 2053 ptr = alloc (ptr, size);
480 2054
481 if (!ptr && size) 2055 if (!ptr && size)
482 { 2056 {
2057#if EV_AVOID_STDIO
2058 ev_printerr ("(libev) memory allocation failed, aborting.\n");
2059#else
483 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 2060 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
2061#endif
484 abort (); 2062 abort ();
485 } 2063 }
486 2064
487 return ptr; 2065 return ptr;
488} 2066}
… …
499typedef struct 2077typedef struct
500{ 2078{
501 WL head; 2079 WL head;
502 unsigned char events; /* the events watched for */ 2080 unsigned char events; /* the events watched for */
503 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 2081 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
504 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 */
505 unsigned char unused; 2083 unsigned char eflags; /* flags field for use by backends */
506#if EV_USE_EPOLL 2084#if EV_USE_EPOLL
507 unsigned int egen; /* generation counter to counter epoll bugs */ 2085 unsigned int egen; /* generation counter to counter epoll bugs */
508#endif 2086#endif
509#if EV_SELECT_IS_WINSOCKET 2087#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
510 SOCKET handle; 2088 SOCKET handle;
2089#endif
2090#if EV_USE_IOCP
2091 OVERLAPPED or, ow;
511#endif 2092#endif
512} ANFD; 2093} ANFD;
513 2094
514/* stores the pending event set for a given watcher */ 2095/* stores the pending event set for a given watcher */
515typedef struct 2096typedef struct
… …
557 #undef VAR 2138 #undef VAR
558 }; 2139 };
559 #include "ev_wrap.h" 2140 #include "ev_wrap.h"
560 2141
561 static struct ev_loop default_loop_struct; 2142 static struct ev_loop default_loop_struct;
562 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 */
563 2144
564#else 2145#else
565 2146
566 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 */
567 #define VAR(name,decl) static decl; 2148 #define VAR(name,decl) static decl;
568 #include "ev_vars.h" 2149 #include "ev_vars.h"
569 #undef VAR 2150 #undef VAR
570 2151
571 static int ev_default_loop_ptr; 2152 static int ev_default_loop_ptr;
572 2153
573#endif 2154#endif
574 2155
575#if EV_MINIMAL < 2 2156#if EV_FEATURE_API
576# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 2157# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
577# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 2158# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
578# define EV_INVOKE_PENDING invoke_cb (EV_A) 2159# define EV_INVOKE_PENDING invoke_cb (EV_A)
579#else 2160#else
580# define EV_RELEASE_CB (void)0 2161# define EV_RELEASE_CB (void)0
581# define EV_ACQUIRE_CB (void)0 2162# define EV_ACQUIRE_CB (void)0
582# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2163# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
583#endif 2164#endif
584 2165
585#define EVUNLOOP_RECURSE 0x80 2166#define EVBREAK_RECURSE 0x80
586 2167
587/*****************************************************************************/ 2168/*****************************************************************************/
588 2169
589#ifndef EV_HAVE_EV_TIME 2170#ifndef EV_HAVE_EV_TIME
590ev_tstamp 2171ev_tstamp
591ev_time (void) 2172ev_time (void) EV_NOEXCEPT
592{ 2173{
593#if EV_USE_REALTIME 2174#if EV_USE_REALTIME
594 if (expect_true (have_realtime)) 2175 if (ecb_expect_true (have_realtime))
595 { 2176 {
596 struct timespec ts; 2177 struct timespec ts;
597 clock_gettime (CLOCK_REALTIME, &ts); 2178 clock_gettime (CLOCK_REALTIME, &ts);
598 return ts.tv_sec + ts.tv_nsec * 1e-9; 2179 return EV_TS_GET (ts);
599 } 2180 }
600#endif 2181#endif
601 2182
2183 {
602 struct timeval tv; 2184 struct timeval tv;
603 gettimeofday (&tv, 0); 2185 gettimeofday (&tv, 0);
604 return tv.tv_sec + tv.tv_usec * 1e-6; 2186 return EV_TV_GET (tv);
2187 }
605} 2188}
606#endif 2189#endif
607 2190
608inline_size ev_tstamp 2191inline_size ev_tstamp
609get_clock (void) 2192get_clock (void)
610{ 2193{
611#if EV_USE_MONOTONIC 2194#if EV_USE_MONOTONIC
612 if (expect_true (have_monotonic)) 2195 if (ecb_expect_true (have_monotonic))
613 { 2196 {
614 struct timespec ts; 2197 struct timespec ts;
615 clock_gettime (CLOCK_MONOTONIC, &ts); 2198 clock_gettime (CLOCK_MONOTONIC, &ts);
616 return ts.tv_sec + ts.tv_nsec * 1e-9; 2199 return EV_TS_GET (ts);
617 } 2200 }
618#endif 2201#endif
619 2202
620 return ev_time (); 2203 return ev_time ();
621} 2204}
622 2205
623#if EV_MULTIPLICITY 2206#if EV_MULTIPLICITY
624ev_tstamp 2207ev_tstamp
625ev_now (EV_P) 2208ev_now (EV_P) EV_NOEXCEPT
626{ 2209{
627 return ev_rt_now; 2210 return ev_rt_now;
628} 2211}
629#endif 2212#endif
630 2213
631void 2214void
632ev_sleep (ev_tstamp delay) 2215ev_sleep (ev_tstamp delay) EV_NOEXCEPT
633{ 2216{
634 if (delay > 0.) 2217 if (delay > EV_TS_CONST (0.))
635 { 2218 {
636#if EV_USE_NANOSLEEP 2219#if EV_USE_NANOSLEEP
637 struct timespec ts; 2220 struct timespec ts;
638 2221
639 ts.tv_sec = (time_t)delay; 2222 EV_TS_SET (ts, delay);
640 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
641
642 nanosleep (&ts, 0); 2223 nanosleep (&ts, 0);
643#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) */
644 Sleep ((unsigned long)(delay * 1e3)); 2227 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
645#else 2228#else
646 struct timeval tv; 2229 struct timeval tv;
647 2230
648 tv.tv_sec = (time_t)delay;
649 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
650
651 /* 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 */
652 /* somehting not guaranteed by newer posix versions, but guaranteed */ 2232 /* something not guaranteed by newer posix versions, but guaranteed */
653 /* by older ones */ 2233 /* by older ones */
2234 EV_TV_SET (tv, delay);
654 select (0, 0, 0, 0, &tv); 2235 select (0, 0, 0, 0, &tv);
655#endif 2236#endif
656 } 2237 }
657} 2238}
658 2239
659/*****************************************************************************/ 2240/*****************************************************************************/
660 2241
661#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 */
662 2243
663/* find a suitable new size for the given array, */ 2244/* find a suitable new size for the given array, */
664/* hopefully by rounding to a ncie-to-malloc size */ 2245/* hopefully by rounding to a nice-to-malloc size */
665inline_size int 2246inline_size int
666array_nextsize (int elem, int cur, int cnt) 2247array_nextsize (int elem, int cur, int cnt)
667{ 2248{
668 int ncur = cur + 1; 2249 int ncur = cur + 1;
669 2250
670 do 2251 do
671 ncur <<= 1; 2252 ncur <<= 1;
672 while (cnt > ncur); 2253 while (cnt > ncur);
673 2254
674 /* 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 */
675 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2256 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
676 { 2257 {
677 ncur *= elem; 2258 ncur *= elem;
678 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);
679 ncur = ncur - sizeof (void *) * 4; 2260 ncur = ncur - sizeof (void *) * 4;
… …
681 } 2262 }
682 2263
683 return ncur; 2264 return ncur;
684} 2265}
685 2266
686static noinline void * 2267ecb_noinline ecb_cold
2268static void *
687array_realloc (int elem, void *base, int *cur, int cnt) 2269array_realloc (int elem, void *base, int *cur, int cnt)
688{ 2270{
689 *cur = array_nextsize (elem, *cur, cnt); 2271 *cur = array_nextsize (elem, *cur, cnt);
690 return ev_realloc (base, elem * *cur); 2272 return ev_realloc (base, elem * *cur);
691} 2273}
692 2274
2275#define array_needsize_noinit(base,offset,count)
2276
693#define array_init_zero(base,count) \ 2277#define array_needsize_zerofill(base,offset,count) \
694 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2278 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
695 2279
696#define array_needsize(type,base,cur,cnt,init) \ 2280#define array_needsize(type,base,cur,cnt,init) \
697 if (expect_false ((cnt) > (cur))) \ 2281 if (ecb_expect_false ((cnt) > (cur))) \
698 { \ 2282 { \
699 int ocur_ = (cur); \ 2283 ecb_unused int ocur_ = (cur); \
700 (base) = (type *)array_realloc \ 2284 (base) = (type *)array_realloc \
701 (sizeof (type), (base), &(cur), (cnt)); \ 2285 (sizeof (type), (base), &(cur), (cnt)); \
702 init ((base) + (ocur_), (cur) - ocur_); \ 2286 init ((base), ocur_, ((cur) - ocur_)); \
703 } 2287 }
704 2288
705#if 0 2289#if 0
706#define array_slim(type,stem) \ 2290#define array_slim(type,stem) \
707 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
716 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
717 2301
718/*****************************************************************************/ 2302/*****************************************************************************/
719 2303
720/* dummy callback for pending events */ 2304/* dummy callback for pending events */
721static void noinline 2305ecb_noinline
2306static void
722pendingcb (EV_P_ ev_prepare *w, int revents) 2307pendingcb (EV_P_ ev_prepare *w, int revents)
723{ 2308{
724} 2309}
725 2310
726void noinline 2311ecb_noinline
2312void
727ev_feed_event (EV_P_ void *w, int revents) 2313ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
728{ 2314{
729 W w_ = (W)w; 2315 W w_ = (W)w;
730 int pri = ABSPRI (w_); 2316 int pri = ABSPRI (w_);
731 2317
732 if (expect_false (w_->pending)) 2318 if (ecb_expect_false (w_->pending))
733 pendings [pri][w_->pending - 1].events |= revents; 2319 pendings [pri][w_->pending - 1].events |= revents;
734 else 2320 else
735 { 2321 {
736 w_->pending = ++pendingcnt [pri]; 2322 w_->pending = ++pendingcnt [pri];
737 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2323 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
738 pendings [pri][w_->pending - 1].w = w_; 2324 pendings [pri][w_->pending - 1].w = w_;
739 pendings [pri][w_->pending - 1].events = revents; 2325 pendings [pri][w_->pending - 1].events = revents;
740 } 2326 }
2327
2328 pendingpri = NUMPRI - 1;
741} 2329}
742 2330
743inline_speed void 2331inline_speed void
744feed_reverse (EV_P_ W w) 2332feed_reverse (EV_P_ W w)
745{ 2333{
746 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2334 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
747 rfeeds [rfeedcnt++] = w; 2335 rfeeds [rfeedcnt++] = w;
748} 2336}
749 2337
750inline_size void 2338inline_size void
751feed_reverse_done (EV_P_ int revents) 2339feed_reverse_done (EV_P_ int revents)
… …
765} 2353}
766 2354
767/*****************************************************************************/ 2355/*****************************************************************************/
768 2356
769inline_speed void 2357inline_speed void
770fd_event_nc (EV_P_ int fd, int revents) 2358fd_event_nocheck (EV_P_ int fd, int revents)
771{ 2359{
772 ANFD *anfd = anfds + fd; 2360 ANFD *anfd = anfds + fd;
773 ev_io *w; 2361 ev_io *w;
774 2362
775 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)
… …
786inline_speed void 2374inline_speed void
787fd_event (EV_P_ int fd, int revents) 2375fd_event (EV_P_ int fd, int revents)
788{ 2376{
789 ANFD *anfd = anfds + fd; 2377 ANFD *anfd = anfds + fd;
790 2378
791 if (expect_true (!anfd->reify)) 2379 if (ecb_expect_true (!anfd->reify))
792 fd_event_nc (EV_A_ fd, revents); 2380 fd_event_nocheck (EV_A_ fd, revents);
793} 2381}
794 2382
795void 2383void
796ev_feed_fd_event (EV_P_ int fd, int revents) 2384ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
797{ 2385{
798 if (fd >= 0 && fd < anfdmax) 2386 if (fd >= 0 && fd < anfdmax)
799 fd_event_nc (EV_A_ fd, revents); 2387 fd_event_nocheck (EV_A_ fd, revents);
800} 2388}
801 2389
802/* make sure the external fd watch events are in-sync */ 2390/* make sure the external fd watch events are in-sync */
803/* with the kernel/libev internal state */ 2391/* with the kernel/libev internal state */
804inline_size void 2392inline_size void
805fd_reify (EV_P) 2393fd_reify (EV_P)
806{ 2394{
807 int i; 2395 int i;
808 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
809 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)
810 { 2435 {
811 int fd = fdchanges [i]; 2436 int fd = fdchanges [i];
812 ANFD *anfd = anfds + fd; 2437 ANFD *anfd = anfds + fd;
813 ev_io *w; 2438 ev_io *w;
814 2439
815 unsigned char events = 0; 2440 unsigned char o_events = anfd->events;
2441 unsigned char o_reify = anfd->reify;
816 2442
817 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2443 anfd->reify = 0;
818 events |= (unsigned char)w->events;
819 2444
820#if EV_SELECT_IS_WINSOCKET 2445 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
821 if (events)
822 { 2446 {
823 unsigned long arg; 2447 anfd->events = 0;
824 #ifdef EV_FD_TO_WIN32_HANDLE 2448
825 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2449 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
826 #else 2450 anfd->events |= (unsigned char)w->events;
827 anfd->handle = _get_osfhandle (fd); 2451
828 #endif 2452 if (o_events != anfd->events)
829 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 2453 o_reify = EV__IOFDSET; /* actually |= */
830 } 2454 }
831#endif
832 2455
833 { 2456 if (o_reify & EV__IOFDSET)
834 unsigned char o_events = anfd->events;
835 unsigned char o_reify = anfd->reify;
836
837 anfd->reify = 0;
838 anfd->events = events;
839
840 if (o_events != events || o_reify & EV__IOFDSET)
841 backend_modify (EV_A_ fd, o_events, events); 2457 backend_modify (EV_A_ fd, o_events, anfd->events);
842 } 2458 }
843 }
844 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
845 fdchangecnt = 0; 2467 fdchangecnt -= changecnt;
846} 2468}
847 2469
848/* something about the given fd changed */ 2470/* something about the given fd changed */
849inline_size void 2471inline_size
2472void
850fd_change (EV_P_ int fd, int flags) 2473fd_change (EV_P_ int fd, int flags)
851{ 2474{
852 unsigned char reify = anfds [fd].reify; 2475 unsigned char reify = anfds [fd].reify;
853 anfds [fd].reify |= flags; 2476 anfds [fd].reify |= flags;
854 2477
855 if (expect_true (!reify)) 2478 if (ecb_expect_true (!reify))
856 { 2479 {
857 ++fdchangecnt; 2480 ++fdchangecnt;
858 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2481 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
859 fdchanges [fdchangecnt - 1] = fd; 2482 fdchanges [fdchangecnt - 1] = fd;
860 } 2483 }
861} 2484}
862 2485
863/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2486/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
864inline_speed void 2487inline_speed ecb_cold void
865fd_kill (EV_P_ int fd) 2488fd_kill (EV_P_ int fd)
866{ 2489{
867 ev_io *w; 2490 ev_io *w;
868 2491
869 while ((w = (ev_io *)anfds [fd].head)) 2492 while ((w = (ev_io *)anfds [fd].head))
… …
871 ev_io_stop (EV_A_ w); 2494 ev_io_stop (EV_A_ w);
872 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);
873 } 2496 }
874} 2497}
875 2498
876/* check whether the given fd is atcually valid, for error recovery */ 2499/* check whether the given fd is actually valid, for error recovery */
877inline_size int 2500inline_size ecb_cold int
878fd_valid (int fd) 2501fd_valid (int fd)
879{ 2502{
880#ifdef _WIN32 2503#ifdef _WIN32
881 return _get_osfhandle (fd) != -1; 2504 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
882#else 2505#else
883 return fcntl (fd, F_GETFD) != -1; 2506 return fcntl (fd, F_GETFD) != -1;
884#endif 2507#endif
885} 2508}
886 2509
887/* called on EBADF to verify fds */ 2510/* called on EBADF to verify fds */
888static void noinline 2511ecb_noinline ecb_cold
2512static void
889fd_ebadf (EV_P) 2513fd_ebadf (EV_P)
890{ 2514{
891 int fd; 2515 int fd;
892 2516
893 for (fd = 0; fd < anfdmax; ++fd) 2517 for (fd = 0; fd < anfdmax; ++fd)
… …
895 if (!fd_valid (fd) && errno == EBADF) 2519 if (!fd_valid (fd) && errno == EBADF)
896 fd_kill (EV_A_ fd); 2520 fd_kill (EV_A_ fd);
897} 2521}
898 2522
899/* 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 */
900static void noinline 2524ecb_noinline ecb_cold
2525static void
901fd_enomem (EV_P) 2526fd_enomem (EV_P)
902{ 2527{
903 int fd; 2528 int fd;
904 2529
905 for (fd = anfdmax; fd--; ) 2530 for (fd = anfdmax; fd--; )
906 if (anfds [fd].events) 2531 if (anfds [fd].events)
907 { 2532 {
908 fd_kill (EV_A_ fd); 2533 fd_kill (EV_A_ fd);
909 return; 2534 break;
910 } 2535 }
911} 2536}
912 2537
913/* 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 */
914static void noinline 2539ecb_noinline
2540static void
915fd_rearm_all (EV_P) 2541fd_rearm_all (EV_P)
916{ 2542{
917 int fd; 2543 int fd;
918 2544
919 for (fd = 0; fd < anfdmax; ++fd) 2545 for (fd = 0; fd < anfdmax; ++fd)
… …
923 anfds [fd].emask = 0; 2549 anfds [fd].emask = 0;
924 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 2550 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
925 } 2551 }
926} 2552}
927 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
928/*****************************************************************************/ 2568/*****************************************************************************/
929 2569
930/* 2570/*
931 * 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
932 * 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
933 * the branching factor of the d-tree. 2573 * the branching factor of the d-tree.
934 */ 2574 */
935 2575
936/* 2576/*
… …
958 ev_tstamp minat; 2598 ev_tstamp minat;
959 ANHE *minpos; 2599 ANHE *minpos;
960 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2600 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
961 2601
962 /* find minimum child */ 2602 /* find minimum child */
963 if (expect_true (pos + DHEAP - 1 < E)) 2603 if (ecb_expect_true (pos + DHEAP - 1 < E))
964 { 2604 {
965 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2605 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
966 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));
967 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));
968 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));
969 } 2609 }
970 else if (pos < E) 2610 else if (pos < E)
971 { 2611 {
972 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2612 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
973 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));
974 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));
975 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));
976 } 2616 }
977 else 2617 else
978 break; 2618 break;
979 2619
980 if (ANHE_at (he) <= minat) 2620 if (ANHE_at (he) <= minat)
… …
988 2628
989 heap [k] = he; 2629 heap [k] = he;
990 ev_active (ANHE_w (he)) = k; 2630 ev_active (ANHE_w (he)) = k;
991} 2631}
992 2632
993#else /* 4HEAP */ 2633#else /* not 4HEAP */
994 2634
995#define HEAP0 1 2635#define HEAP0 1
996#define HPARENT(k) ((k) >> 1) 2636#define HPARENT(k) ((k) >> 1)
997#define UPHEAP_DONE(p,k) (!(p)) 2637#define UPHEAP_DONE(p,k) (!(p))
998 2638
… …
1004 2644
1005 for (;;) 2645 for (;;)
1006 { 2646 {
1007 int c = k << 1; 2647 int c = k << 1;
1008 2648
1009 if (c > N + HEAP0 - 1) 2649 if (c >= N + HEAP0)
1010 break; 2650 break;
1011 2651
1012 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])
1013 ? 1 : 0; 2653 ? 1 : 0;
1014 2654
… …
1050 2690
1051/* move an element suitably so it is in a correct place */ 2691/* move an element suitably so it is in a correct place */
1052inline_size void 2692inline_size void
1053adjustheap (ANHE *heap, int N, int k) 2693adjustheap (ANHE *heap, int N, int k)
1054{ 2694{
1055 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)]))
1056 upheap (heap, k); 2696 upheap (heap, k);
1057 else 2697 else
1058 downheap (heap, N, k); 2698 downheap (heap, N, k);
1059} 2699}
1060 2700
… …
1070 upheap (heap, i + HEAP0); 2710 upheap (heap, i + HEAP0);
1071} 2711}
1072 2712
1073/*****************************************************************************/ 2713/*****************************************************************************/
1074 2714
1075/* associate signal watchers to a signal signal */ 2715/* associate signal watchers to a signal */
1076typedef struct 2716typedef struct
1077{ 2717{
2718 EV_ATOMIC_T pending;
2719#if EV_MULTIPLICITY
2720 EV_P;
2721#endif
1078 WL head; 2722 WL head;
1079 EV_ATOMIC_T gotsig;
1080} ANSIG; 2723} ANSIG;
1081 2724
1082static ANSIG *signals; 2725static ANSIG signals [EV_NSIG - 1];
1083static int signalmax;
1084
1085static EV_ATOMIC_T gotsig;
1086 2726
1087/*****************************************************************************/ 2727/*****************************************************************************/
1088 2728
1089/* used to prepare libev internal fd's */ 2729#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1090/* this is not fork-safe */ 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
1091inline_speed void 2777inline_speed void
1092fd_intern (int fd) 2778evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1093{ 2779{
1094#ifdef _WIN32 2780 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1095 unsigned long arg = 1;
1096 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1097#else
1098 fcntl (fd, F_SETFD, FD_CLOEXEC);
1099 fcntl (fd, F_SETFL, O_NONBLOCK);
1100#endif
1101}
1102 2781
1103static void noinline 2782 if (ecb_expect_true (*flag))
1104evpipe_init (EV_P) 2783 return;
1105{ 2784
1106 if (!ev_is_active (&pipe_w)) 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)
1107 { 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
1108#if EV_USE_EVENTFD 2801#if EV_USE_EVENTFD
1109 if ((evfd = eventfd (0, 0)) >= 0) 2802 if (evpipe [0] < 0)
1110 { 2803 {
1111 evpipe [0] = -1; 2804 uint64_t counter = 1;
1112 fd_intern (evfd); 2805 write (evpipe [1], &counter, sizeof (uint64_t));
1113 ev_io_set (&pipe_w, evfd, EV_READ);
1114 } 2806 }
1115 else 2807 else
1116#endif 2808#endif
1117 { 2809 {
1118 while (pipe (evpipe)) 2810#ifdef _WIN32
1119 ev_syserr ("(libev) error creating signal/async pipe"); 2811 WSABUF buf;
1120 2812 DWORD sent;
1121 fd_intern (evpipe [0]); 2813 buf.buf = (char *)&buf;
1122 fd_intern (evpipe [1]); 2814 buf.len = 1;
1123 ev_io_set (&pipe_w, 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
1124 } 2819 }
1125
1126 ev_io_start (EV_A_ &pipe_w);
1127 ev_unref (EV_A); /* watcher should not keep loop alive */
1128 }
1129}
1130
1131inline_size void
1132evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1133{
1134 if (!*flag)
1135 {
1136 int old_errno = errno; /* save errno because write might clobber it */
1137
1138 *flag = 1;
1139
1140#if EV_USE_EVENTFD
1141 if (evfd >= 0)
1142 {
1143 uint64_t counter = 1;
1144 write (evfd, &counter, sizeof (uint64_t));
1145 }
1146 else
1147#endif
1148 write (evpipe [1], &old_errno, 1);
1149 2820
1150 errno = old_errno; 2821 errno = old_errno;
1151 } 2822 }
1152} 2823}
1153 2824
1154/* called whenever the libev signal pipe */ 2825/* called whenever the libev signal pipe */
1155/* got some events (signal, async) */ 2826/* got some events (signal, async) */
1156static void 2827static void
1157pipecb (EV_P_ ev_io *iow, int revents) 2828pipecb (EV_P_ ev_io *iow, int revents)
1158{ 2829{
2830 int i;
2831
2832 if (revents & EV_READ)
2833 {
1159#if EV_USE_EVENTFD 2834#if EV_USE_EVENTFD
1160 if (evfd >= 0) 2835 if (evpipe [0] < 0)
1161 { 2836 {
1162 uint64_t counter; 2837 uint64_t counter;
1163 read (evfd, &counter, sizeof (uint64_t)); 2838 read (evpipe [1], &counter, sizeof (uint64_t));
1164 } 2839 }
1165 else 2840 else
1166#endif 2841#endif
1167 { 2842 {
1168 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
1169 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)
1170 } 2863 {
2864 sig_pending = 0;
1171 2865
1172 if (gotsig && ev_is_default_loop (EV_A)) 2866 ECB_MEMORY_FENCE;
1173 {
1174 int signum;
1175 gotsig = 0;
1176 2867
1177 for (signum = signalmax; signum--; ) 2868 for (i = EV_NSIG - 1; i--; )
1178 if (signals [signum].gotsig) 2869 if (ecb_expect_false (signals [i].pending))
1179 ev_feed_signal_event (EV_A_ signum + 1); 2870 ev_feed_signal_event (EV_A_ i + 1);
1180 } 2871 }
2872#endif
1181 2873
1182#if EV_ASYNC_ENABLE 2874#if EV_ASYNC_ENABLE
1183 if (gotasync) 2875 if (async_pending)
1184 { 2876 {
1185 int i; 2877 async_pending = 0;
1186 gotasync = 0; 2878
2879 ECB_MEMORY_FENCE;
1187 2880
1188 for (i = asynccnt; i--; ) 2881 for (i = asynccnt; i--; )
1189 if (asyncs [i]->sent) 2882 if (asyncs [i]->sent)
1190 { 2883 {
1191 asyncs [i]->sent = 0; 2884 asyncs [i]->sent = 0;
2885 ECB_MEMORY_FENCE_RELEASE;
1192 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2886 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1193 } 2887 }
1194 } 2888 }
1195#endif 2889#endif
1196} 2890}
1197 2891
1198/*****************************************************************************/ 2892/*****************************************************************************/
1199 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
1200static void 2910static void
1201ev_sighandler (int signum) 2911ev_sighandler (int signum)
1202{ 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
1203#if EV_MULTIPLICITY 2931#if EV_MULTIPLICITY
1204 struct ev_loop *loop = &default_loop_struct; 2932 /* it is permissible to try to feed a signal to the wrong loop */
1205#endif 2933 /* or, likely more useful, feeding a signal nobody is waiting for */
1206 2934
1207#if _WIN32 2935 if (ecb_expect_false (signals [signum].loop != EV_A))
1208 signal (signum, ev_sighandler);
1209#endif
1210
1211 signals [signum - 1].gotsig = 1;
1212 evpipe_write (EV_A_ &gotsig);
1213}
1214
1215void noinline
1216ev_feed_signal_event (EV_P_ int signum)
1217{
1218 WL w;
1219
1220#if EV_MULTIPLICITY
1221 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1222#endif
1223
1224 --signum;
1225
1226 if (signum < 0 || signum >= signalmax)
1227 return; 2936 return;
2937#endif
1228 2938
1229 signals [signum].gotsig = 0; 2939 signals [signum].pending = 0;
2940 ECB_MEMORY_FENCE_RELEASE;
1230 2941
1231 for (w = signals [signum].head; w; w = w->next) 2942 for (w = signals [signum].head; w; w = w->next)
1232 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2943 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1233} 2944}
1234 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
1235/*****************************************************************************/ 2968/*****************************************************************************/
1236 2969
2970#if EV_CHILD_ENABLE
1237static WL childs [EV_PID_HASHSIZE]; 2971static WL childs [EV_PID_HASHSIZE];
1238
1239#ifndef _WIN32
1240 2972
1241static ev_signal childev; 2973static ev_signal childev;
1242 2974
1243#ifndef WIFCONTINUED 2975#ifndef WIFCONTINUED
1244# define WIFCONTINUED(status) 0 2976# define WIFCONTINUED(status) 0
… …
1249child_reap (EV_P_ int chain, int pid, int status) 2981child_reap (EV_P_ int chain, int pid, int status)
1250{ 2982{
1251 ev_child *w; 2983 ev_child *w;
1252 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2984 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1253 2985
1254 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)
1255 { 2987 {
1256 if ((w->pid == pid || !w->pid) 2988 if ((w->pid == pid || !w->pid)
1257 && (!traced || (w->flags & 1))) 2989 && (!traced || (w->flags & 1)))
1258 { 2990 {
1259 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 */
… …
1284 /* 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 */
1285 /* 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 */
1286 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 3018 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1287 3019
1288 child_reap (EV_A_ pid, pid, status); 3020 child_reap (EV_A_ pid, pid, status);
1289 if (EV_PID_HASHSIZE > 1) 3021 if ((EV_PID_HASHSIZE) > 1)
1290 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 */
1291} 3023}
1292 3024
1293#endif 3025#endif
1294 3026
1295/*****************************************************************************/ 3027/*****************************************************************************/
1296 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 periodics_reschedule (EV_A);
3049}
3050
3051ecb_noinline ecb_cold
3052static void
3053evtimerfd_init (EV_P)
3054{
3055 if (!ev_is_active (&timerfd_w))
3056 {
3057 timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
3058
3059 if (timerfd >= 0)
3060 {
3061 fd_intern (timerfd); /* just to be sure */
3062
3063 ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ);
3064 ev_set_priority (&timerfd_w, EV_MINPRI);
3065 ev_io_start (EV_A_ &timerfd_w);
3066 ev_unref (EV_A); /* watcher should not keep loop alive */
3067
3068 /* (re-) arm timer */
3069 timerfdcb (EV_A_ 0, 0);
3070 }
3071 }
3072}
3073
3074#endif
3075
3076/*****************************************************************************/
3077
3078#if EV_USE_IOCP
3079# include "ev_iocp.c"
3080#endif
1297#if EV_USE_PORT 3081#if EV_USE_PORT
1298# include "ev_port.c" 3082# include "ev_port.c"
1299#endif 3083#endif
1300#if EV_USE_KQUEUE 3084#if EV_USE_KQUEUE
1301# include "ev_kqueue.c" 3085# include "ev_kqueue.c"
1302#endif 3086#endif
1303#if EV_USE_EPOLL 3087#if EV_USE_EPOLL
1304# include "ev_epoll.c" 3088# include "ev_epoll.c"
1305#endif 3089#endif
3090#if EV_USE_LINUXAIO
3091# include "ev_linuxaio.c"
3092#endif
3093#if EV_USE_IOURING
3094# include "ev_iouring.c"
3095#endif
1306#if EV_USE_POLL 3096#if EV_USE_POLL
1307# include "ev_poll.c" 3097# include "ev_poll.c"
1308#endif 3098#endif
1309#if EV_USE_SELECT 3099#if EV_USE_SELECT
1310# include "ev_select.c" 3100# include "ev_select.c"
1311#endif 3101#endif
1312 3102
1313int 3103ecb_cold int
1314ev_version_major (void) 3104ev_version_major (void) EV_NOEXCEPT
1315{ 3105{
1316 return EV_VERSION_MAJOR; 3106 return EV_VERSION_MAJOR;
1317} 3107}
1318 3108
1319int 3109ecb_cold int
1320ev_version_minor (void) 3110ev_version_minor (void) EV_NOEXCEPT
1321{ 3111{
1322 return EV_VERSION_MINOR; 3112 return EV_VERSION_MINOR;
1323} 3113}
1324 3114
1325/* return true if we are running with elevated privileges and should ignore env variables */ 3115/* return true if we are running with elevated privileges and should ignore env variables */
1326int inline_size 3116inline_size ecb_cold int
1327enable_secure (void) 3117enable_secure (void)
1328{ 3118{
1329#ifdef _WIN32 3119#ifdef _WIN32
1330 return 0; 3120 return 0;
1331#else 3121#else
1332 return getuid () != geteuid () 3122 return getuid () != geteuid ()
1333 || getgid () != getegid (); 3123 || getgid () != getegid ();
1334#endif 3124#endif
1335} 3125}
1336 3126
3127ecb_cold
1337unsigned int 3128unsigned int
1338ev_supported_backends (void) 3129ev_supported_backends (void) EV_NOEXCEPT
1339{ 3130{
1340 unsigned int flags = 0; 3131 unsigned int flags = 0;
1341 3132
1342 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3133 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1343 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 3134 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1344 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3135 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1345 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3136 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
1346 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 3137 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
1347 3138 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3139 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3140
1348 return flags; 3141 return flags;
1349} 3142}
1350 3143
3144ecb_cold
1351unsigned int 3145unsigned int
1352ev_recommended_backends (void) 3146ev_recommended_backends (void) EV_NOEXCEPT
1353{ 3147{
1354 unsigned int flags = ev_supported_backends (); 3148 unsigned int flags = ev_supported_backends ();
1355 3149
1356#ifndef __NetBSD__ 3150#ifndef __NetBSD__
1357 /* kqueue is borked on everything but netbsd apparently */ 3151 /* kqueue is borked on everything but netbsd apparently */
… …
1361#ifdef __APPLE__ 3155#ifdef __APPLE__
1362 /* only select works correctly on that "unix-certified" platform */ 3156 /* only select works correctly on that "unix-certified" platform */
1363 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 3157 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1364 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 3158 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1365#endif 3159#endif
3160#ifdef __FreeBSD__
3161 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
3162#endif
3163
3164 /* TODO: linuxaio is very experimental */
3165#if !EV_RECOMMEND_LINUXAIO
3166 flags &= ~EVBACKEND_LINUXAIO;
3167#endif
3168 /* TODO: linuxaio is super experimental */
3169#if !EV_RECOMMEND_IOURING
3170 flags &= ~EVBACKEND_IOURING;
3171#endif
1366 3172
1367 return flags; 3173 return flags;
1368} 3174}
1369 3175
3176ecb_cold
1370unsigned int 3177unsigned int
1371ev_embeddable_backends (void) 3178ev_embeddable_backends (void) EV_NOEXCEPT
1372{ 3179{
1373 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3180 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
1374 3181
1375 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 3182 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1376 /* please fix it and tell me how to detect the fix */ 3183 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1377 flags &= ~EVBACKEND_EPOLL; 3184 flags &= ~EVBACKEND_EPOLL;
3185
3186 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
1378 3187
1379 return flags; 3188 return flags;
1380} 3189}
1381 3190
1382unsigned int 3191unsigned int
1383ev_backend (EV_P) 3192ev_backend (EV_P) EV_NOEXCEPT
1384{ 3193{
1385 return backend; 3194 return backend;
1386} 3195}
1387 3196
1388#if EV_MINIMAL < 2 3197#if EV_FEATURE_API
1389unsigned int 3198unsigned int
1390ev_loop_count (EV_P) 3199ev_iteration (EV_P) EV_NOEXCEPT
1391{ 3200{
1392 return loop_count; 3201 return loop_count;
1393} 3202}
1394 3203
1395unsigned int 3204unsigned int
1396ev_loop_depth (EV_P) 3205ev_depth (EV_P) EV_NOEXCEPT
1397{ 3206{
1398 return loop_depth; 3207 return loop_depth;
1399} 3208}
1400 3209
1401void 3210void
1402ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 3211ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1403{ 3212{
1404 io_blocktime = interval; 3213 io_blocktime = interval;
1405} 3214}
1406 3215
1407void 3216void
1408ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 3217ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1409{ 3218{
1410 timeout_blocktime = interval; 3219 timeout_blocktime = interval;
1411} 3220}
1412 3221
1413void 3222void
1414ev_set_userdata (EV_P_ void *data) 3223ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1415{ 3224{
1416 userdata = data; 3225 userdata = data;
1417} 3226}
1418 3227
1419void * 3228void *
1420ev_userdata (EV_P) 3229ev_userdata (EV_P) EV_NOEXCEPT
1421{ 3230{
1422 return userdata; 3231 return userdata;
1423} 3232}
1424 3233
3234void
1425void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 3235ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1426{ 3236{
1427 invoke_cb = invoke_pending_cb; 3237 invoke_cb = invoke_pending_cb;
1428} 3238}
1429 3239
3240void
1430void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 3241ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1431{ 3242{
1432 release_cb = release; 3243 release_cb = release;
1433 acquire_cb = acquire; 3244 acquire_cb = acquire;
1434} 3245}
1435#endif 3246#endif
1436 3247
1437/* initialise a loop structure, must be zero-initialised */ 3248/* initialise a loop structure, must be zero-initialised */
1438static void noinline 3249ecb_noinline ecb_cold
3250static void
1439loop_init (EV_P_ unsigned int flags) 3251loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1440{ 3252{
1441 if (!backend) 3253 if (!backend)
1442 { 3254 {
3255 origflags = flags;
3256
1443#if EV_USE_REALTIME 3257#if EV_USE_REALTIME
1444 if (!have_realtime) 3258 if (!have_realtime)
1445 { 3259 {
1446 struct timespec ts; 3260 struct timespec ts;
1447 3261
… …
1458 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3272 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1459 have_monotonic = 1; 3273 have_monotonic = 1;
1460 } 3274 }
1461#endif 3275#endif
1462 3276
1463 ev_rt_now = ev_time ();
1464 mn_now = get_clock ();
1465 now_floor = mn_now;
1466 rtmn_diff = ev_rt_now - mn_now;
1467#if EV_MINIMAL < 2
1468 invoke_cb = ev_invoke_pending;
1469#endif
1470
1471 io_blocktime = 0.;
1472 timeout_blocktime = 0.;
1473 backend = 0;
1474 backend_fd = -1;
1475 gotasync = 0;
1476#if EV_USE_INOTIFY
1477 fs_fd = -2;
1478#endif
1479
1480 /* pid check not overridable via env */ 3277 /* pid check not overridable via env */
1481#ifndef _WIN32 3278#ifndef _WIN32
1482 if (flags & EVFLAG_FORKCHECK) 3279 if (flags & EVFLAG_FORKCHECK)
1483 curpid = getpid (); 3280 curpid = getpid ();
1484#endif 3281#endif
… …
1486 if (!(flags & EVFLAG_NOENV) 3283 if (!(flags & EVFLAG_NOENV)
1487 && !enable_secure () 3284 && !enable_secure ()
1488 && getenv ("LIBEV_FLAGS")) 3285 && getenv ("LIBEV_FLAGS"))
1489 flags = atoi (getenv ("LIBEV_FLAGS")); 3286 flags = atoi (getenv ("LIBEV_FLAGS"));
1490 3287
1491 if (!(flags & 0x0000ffffU)) 3288 ev_rt_now = ev_time ();
3289 mn_now = get_clock ();
3290 now_floor = mn_now;
3291 rtmn_diff = ev_rt_now - mn_now;
3292#if EV_FEATURE_API
3293 invoke_cb = ev_invoke_pending;
3294#endif
3295
3296 io_blocktime = 0.;
3297 timeout_blocktime = 0.;
3298 backend = 0;
3299 backend_fd = -1;
3300 sig_pending = 0;
3301#if EV_ASYNC_ENABLE
3302 async_pending = 0;
3303#endif
3304 pipe_write_skipped = 0;
3305 pipe_write_wanted = 0;
3306 evpipe [0] = -1;
3307 evpipe [1] = -1;
3308#if EV_USE_INOTIFY
3309 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
3310#endif
3311#if EV_USE_SIGNALFD
3312 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3313#endif
3314#if EV_USE_TIMERFD
3315 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3316#endif
3317
3318 if (!(flags & EVBACKEND_MASK))
1492 flags |= ev_recommended_backends (); 3319 flags |= ev_recommended_backends ();
1493 3320
3321#if EV_USE_IOCP
3322 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3323#endif
1494#if EV_USE_PORT 3324#if EV_USE_PORT
1495 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3325 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1496#endif 3326#endif
1497#if EV_USE_KQUEUE 3327#if EV_USE_KQUEUE
1498 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3328 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3329#endif
3330#if EV_USE_IOURING
3331 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3332#endif
3333#if EV_USE_LINUXAIO
3334 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1499#endif 3335#endif
1500#if EV_USE_EPOLL 3336#if EV_USE_EPOLL
1501 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3337 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1502#endif 3338#endif
1503#if EV_USE_POLL 3339#if EV_USE_POLL
1504 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3340 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1505#endif 3341#endif
1506#if EV_USE_SELECT 3342#if EV_USE_SELECT
1507 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3343 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1508#endif 3344#endif
1509 3345
1510 ev_prepare_init (&pending_w, pendingcb); 3346 ev_prepare_init (&pending_w, pendingcb);
1511 3347
3348#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1512 ev_init (&pipe_w, pipecb); 3349 ev_init (&pipe_w, pipecb);
1513 ev_set_priority (&pipe_w, EV_MAXPRI); 3350 ev_set_priority (&pipe_w, EV_MAXPRI);
3351#endif
1514 } 3352 }
1515} 3353}
1516 3354
1517/* free up a loop structure */ 3355/* free up a loop structure */
1518static void noinline 3356ecb_cold
3357void
1519loop_destroy (EV_P) 3358ev_loop_destroy (EV_P)
1520{ 3359{
1521 int i; 3360 int i;
1522 3361
3362#if EV_MULTIPLICITY
3363 /* mimic free (0) */
3364 if (!EV_A)
3365 return;
3366#endif
3367
3368#if EV_CLEANUP_ENABLE
3369 /* queue cleanup watchers (and execute them) */
3370 if (ecb_expect_false (cleanupcnt))
3371 {
3372 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3373 EV_INVOKE_PENDING;
3374 }
3375#endif
3376
3377#if EV_CHILD_ENABLE
3378 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3379 {
3380 ev_ref (EV_A); /* child watcher */
3381 ev_signal_stop (EV_A_ &childev);
3382 }
3383#endif
3384
1523 if (ev_is_active (&pipe_w)) 3385 if (ev_is_active (&pipe_w))
1524 { 3386 {
1525 ev_ref (EV_A); /* signal watcher */ 3387 /*ev_ref (EV_A);*/
1526 ev_io_stop (EV_A_ &pipe_w); 3388 /*ev_io_stop (EV_A_ &pipe_w);*/
1527 3389
3390 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
3391 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
3392 }
3393
3394#if EV_USE_SIGNALFD
3395 if (ev_is_active (&sigfd_w))
3396 close (sigfd);
3397#endif
3398
1528#if EV_USE_EVENTFD 3399#if EV_USE_TIMERFD
1529 if (evfd >= 0) 3400 if (ev_is_active (&timerfd_w))
1530 close (evfd); 3401 close (timerfd);
1531#endif 3402#endif
1532
1533 if (evpipe [0] >= 0)
1534 {
1535 close (evpipe [0]);
1536 close (evpipe [1]);
1537 }
1538 }
1539 3403
1540#if EV_USE_INOTIFY 3404#if EV_USE_INOTIFY
1541 if (fs_fd >= 0) 3405 if (fs_fd >= 0)
1542 close (fs_fd); 3406 close (fs_fd);
1543#endif 3407#endif
1544 3408
1545 if (backend_fd >= 0) 3409 if (backend_fd >= 0)
1546 close (backend_fd); 3410 close (backend_fd);
1547 3411
3412#if EV_USE_IOCP
3413 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3414#endif
1548#if EV_USE_PORT 3415#if EV_USE_PORT
1549 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3416 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1550#endif 3417#endif
1551#if EV_USE_KQUEUE 3418#if EV_USE_KQUEUE
1552 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3419 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3420#endif
3421#if EV_USE_IOURING
3422 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3423#endif
3424#if EV_USE_LINUXAIO
3425 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1553#endif 3426#endif
1554#if EV_USE_EPOLL 3427#if EV_USE_EPOLL
1555 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3428 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1556#endif 3429#endif
1557#if EV_USE_POLL 3430#if EV_USE_POLL
1558 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3431 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1559#endif 3432#endif
1560#if EV_USE_SELECT 3433#if EV_USE_SELECT
1561 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3434 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1562#endif 3435#endif
1563 3436
1564 for (i = NUMPRI; i--; ) 3437 for (i = NUMPRI; i--; )
1565 { 3438 {
1566 array_free (pending, [i]); 3439 array_free (pending, [i]);
1567#if EV_IDLE_ENABLE 3440#if EV_IDLE_ENABLE
1568 array_free (idle, [i]); 3441 array_free (idle, [i]);
1569#endif 3442#endif
1570 } 3443 }
1571 3444
1572 ev_free (anfds); anfdmax = 0; 3445 ev_free (anfds); anfds = 0; anfdmax = 0;
1573 3446
1574 /* have to use the microsoft-never-gets-it-right macro */ 3447 /* have to use the microsoft-never-gets-it-right macro */
1575 array_free (rfeed, EMPTY); 3448 array_free (rfeed, EMPTY);
1576 array_free (fdchange, EMPTY); 3449 array_free (fdchange, EMPTY);
1577 array_free (timer, EMPTY); 3450 array_free (timer, EMPTY);
… …
1579 array_free (periodic, EMPTY); 3452 array_free (periodic, EMPTY);
1580#endif 3453#endif
1581#if EV_FORK_ENABLE 3454#if EV_FORK_ENABLE
1582 array_free (fork, EMPTY); 3455 array_free (fork, EMPTY);
1583#endif 3456#endif
3457#if EV_CLEANUP_ENABLE
3458 array_free (cleanup, EMPTY);
3459#endif
1584 array_free (prepare, EMPTY); 3460 array_free (prepare, EMPTY);
1585 array_free (check, EMPTY); 3461 array_free (check, EMPTY);
1586#if EV_ASYNC_ENABLE 3462#if EV_ASYNC_ENABLE
1587 array_free (async, EMPTY); 3463 array_free (async, EMPTY);
1588#endif 3464#endif
1589 3465
1590 backend = 0; 3466 backend = 0;
3467
3468#if EV_MULTIPLICITY
3469 if (ev_is_default_loop (EV_A))
3470#endif
3471 ev_default_loop_ptr = 0;
3472#if EV_MULTIPLICITY
3473 else
3474 ev_free (EV_A);
3475#endif
1591} 3476}
1592 3477
1593#if EV_USE_INOTIFY 3478#if EV_USE_INOTIFY
1594inline_size void infy_fork (EV_P); 3479inline_size void infy_fork (EV_P);
1595#endif 3480#endif
1596 3481
1597inline_size void 3482inline_size void
1598loop_fork (EV_P) 3483loop_fork (EV_P)
1599{ 3484{
1600#if EV_USE_PORT 3485#if EV_USE_PORT
1601 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3486 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1602#endif 3487#endif
1603#if EV_USE_KQUEUE 3488#if EV_USE_KQUEUE
1604 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3489 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3490#endif
3491#if EV_USE_IOURING
3492 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3493#endif
3494#if EV_USE_LINUXAIO
3495 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1605#endif 3496#endif
1606#if EV_USE_EPOLL 3497#if EV_USE_EPOLL
1607 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3498 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1608#endif 3499#endif
1609#if EV_USE_INOTIFY 3500#if EV_USE_INOTIFY
1610 infy_fork (EV_A); 3501 infy_fork (EV_A);
1611#endif 3502#endif
1612 3503
3504 if (postfork != 2)
3505 {
3506 #if EV_USE_SIGNALFD
3507 /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */
3508 #endif
3509
3510 #if EV_USE_TIMERFD
3511 if (ev_is_active (&timerfd_w))
3512 {
3513 ev_ref (EV_A);
3514 ev_io_stop (EV_A_ &timerfd_w);
3515
3516 close (timerfd);
3517 timerfd = -2;
3518
3519 evtimerfd_init (EV_A);
3520 /* reschedule periodics, in case we missed something */
3521 ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM);
3522 }
3523 #endif
3524
3525 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1613 if (ev_is_active (&pipe_w)) 3526 if (ev_is_active (&pipe_w))
1614 { 3527 {
1615 /* this "locks" the handlers against writing to the pipe */ 3528 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1616 /* while we modify the fd vars */ 3529
1617 gotsig = 1;
1618#if EV_ASYNC_ENABLE
1619 gotasync = 1;
1620#endif
1621
1622 ev_ref (EV_A); 3530 ev_ref (EV_A);
1623 ev_io_stop (EV_A_ &pipe_w); 3531 ev_io_stop (EV_A_ &pipe_w);
1624 3532
1625#if EV_USE_EVENTFD
1626 if (evfd >= 0)
1627 close (evfd);
1628#endif
1629
1630 if (evpipe [0] >= 0) 3533 if (evpipe [0] >= 0)
3534 EV_WIN32_CLOSE_FD (evpipe [0]);
1631 { 3535
1632 close (evpipe [0]); 3536 evpipe_init (EV_A);
1633 close (evpipe [1]); 3537 /* iterate over everything, in case we missed something before */
3538 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1634 } 3539 }
1635 3540 #endif
1636 evpipe_init (EV_A);
1637 /* now iterate over everything, in case we missed something */
1638 pipecb (EV_A_ &pipe_w, EV_READ);
1639 } 3541 }
1640 3542
1641 postfork = 0; 3543 postfork = 0;
1642} 3544}
1643 3545
1644#if EV_MULTIPLICITY 3546#if EV_MULTIPLICITY
1645 3547
3548ecb_cold
1646struct ev_loop * 3549struct ev_loop *
1647ev_loop_new (unsigned int flags) 3550ev_loop_new (unsigned int flags) EV_NOEXCEPT
1648{ 3551{
1649 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3552 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1650 3553
1651 memset (loop, 0, sizeof (struct ev_loop)); 3554 memset (EV_A, 0, sizeof (struct ev_loop));
1652
1653 loop_init (EV_A_ flags); 3555 loop_init (EV_A_ flags);
1654 3556
1655 if (ev_backend (EV_A)) 3557 if (ev_backend (EV_A))
1656 return loop; 3558 return EV_A;
1657 3559
3560 ev_free (EV_A);
1658 return 0; 3561 return 0;
1659} 3562}
1660 3563
1661void
1662ev_loop_destroy (EV_P)
1663{
1664 loop_destroy (EV_A);
1665 ev_free (loop);
1666}
1667
1668void
1669ev_loop_fork (EV_P)
1670{
1671 postfork = 1; /* must be in line with ev_default_fork */
1672}
1673#endif /* multiplicity */ 3564#endif /* multiplicity */
1674 3565
1675#if EV_VERIFY 3566#if EV_VERIFY
1676static void noinline 3567ecb_noinline ecb_cold
3568static void
1677verify_watcher (EV_P_ W w) 3569verify_watcher (EV_P_ W w)
1678{ 3570{
1679 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3571 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1680 3572
1681 if (w->pending) 3573 if (w->pending)
1682 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3574 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1683} 3575}
1684 3576
1685static void noinline 3577ecb_noinline ecb_cold
3578static void
1686verify_heap (EV_P_ ANHE *heap, int N) 3579verify_heap (EV_P_ ANHE *heap, int N)
1687{ 3580{
1688 int i; 3581 int i;
1689 3582
1690 for (i = HEAP0; i < N + HEAP0; ++i) 3583 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1695 3588
1696 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3589 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1697 } 3590 }
1698} 3591}
1699 3592
1700static void noinline 3593ecb_noinline ecb_cold
3594static void
1701array_verify (EV_P_ W *ws, int cnt) 3595array_verify (EV_P_ W *ws, int cnt)
1702{ 3596{
1703 while (cnt--) 3597 while (cnt--)
1704 { 3598 {
1705 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3599 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1706 verify_watcher (EV_A_ ws [cnt]); 3600 verify_watcher (EV_A_ ws [cnt]);
1707 } 3601 }
1708} 3602}
1709#endif 3603#endif
1710 3604
1711#if EV_MINIMAL < 2 3605#if EV_FEATURE_API
1712void 3606void ecb_cold
1713ev_loop_verify (EV_P) 3607ev_verify (EV_P) EV_NOEXCEPT
1714{ 3608{
1715#if EV_VERIFY 3609#if EV_VERIFY
1716 int i; 3610 int i;
1717 WL w; 3611 WL w, w2;
1718 3612
1719 assert (activecnt >= -1); 3613 assert (activecnt >= -1);
1720 3614
1721 assert (fdchangemax >= fdchangecnt); 3615 assert (fdchangemax >= fdchangecnt);
1722 for (i = 0; i < fdchangecnt; ++i) 3616 for (i = 0; i < fdchangecnt; ++i)
1723 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3617 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1724 3618
1725 assert (anfdmax >= 0); 3619 assert (anfdmax >= 0);
1726 for (i = 0; i < anfdmax; ++i) 3620 for (i = 0; i < anfdmax; ++i)
3621 {
3622 int j = 0;
3623
1727 for (w = anfds [i].head; w; w = w->next) 3624 for (w = w2 = anfds [i].head; w; w = w->next)
1728 { 3625 {
1729 verify_watcher (EV_A_ (W)w); 3626 verify_watcher (EV_A_ (W)w);
3627
3628 if (j++ & 1)
3629 {
3630 assert (("libev: io watcher list contains a loop", w != w2));
3631 w2 = w2->next;
3632 }
3633
1730 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3634 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1731 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3635 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1732 } 3636 }
3637 }
1733 3638
1734 assert (timermax >= timercnt); 3639 assert (timermax >= timercnt);
1735 verify_heap (EV_A_ timers, timercnt); 3640 verify_heap (EV_A_ timers, timercnt);
1736 3641
1737#if EV_PERIODIC_ENABLE 3642#if EV_PERIODIC_ENABLE
… …
1752#if EV_FORK_ENABLE 3657#if EV_FORK_ENABLE
1753 assert (forkmax >= forkcnt); 3658 assert (forkmax >= forkcnt);
1754 array_verify (EV_A_ (W *)forks, forkcnt); 3659 array_verify (EV_A_ (W *)forks, forkcnt);
1755#endif 3660#endif
1756 3661
3662#if EV_CLEANUP_ENABLE
3663 assert (cleanupmax >= cleanupcnt);
3664 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3665#endif
3666
1757#if EV_ASYNC_ENABLE 3667#if EV_ASYNC_ENABLE
1758 assert (asyncmax >= asynccnt); 3668 assert (asyncmax >= asynccnt);
1759 array_verify (EV_A_ (W *)asyncs, asynccnt); 3669 array_verify (EV_A_ (W *)asyncs, asynccnt);
1760#endif 3670#endif
1761 3671
3672#if EV_PREPARE_ENABLE
1762 assert (preparemax >= preparecnt); 3673 assert (preparemax >= preparecnt);
1763 array_verify (EV_A_ (W *)prepares, preparecnt); 3674 array_verify (EV_A_ (W *)prepares, preparecnt);
3675#endif
1764 3676
3677#if EV_CHECK_ENABLE
1765 assert (checkmax >= checkcnt); 3678 assert (checkmax >= checkcnt);
1766 array_verify (EV_A_ (W *)checks, checkcnt); 3679 array_verify (EV_A_ (W *)checks, checkcnt);
3680#endif
1767 3681
1768# if 0 3682# if 0
3683#if EV_CHILD_ENABLE
1769 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 3684 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1770 for (signum = signalmax; signum--; ) if (signals [signum].gotsig) 3685 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3686#endif
1771# endif 3687# endif
1772#endif 3688#endif
1773} 3689}
1774#endif 3690#endif
1775 3691
1776#if EV_MULTIPLICITY 3692#if EV_MULTIPLICITY
3693ecb_cold
1777struct ev_loop * 3694struct ev_loop *
1778ev_default_loop_init (unsigned int flags)
1779#else 3695#else
1780int 3696int
3697#endif
1781ev_default_loop (unsigned int flags) 3698ev_default_loop (unsigned int flags) EV_NOEXCEPT
1782#endif
1783{ 3699{
1784 if (!ev_default_loop_ptr) 3700 if (!ev_default_loop_ptr)
1785 { 3701 {
1786#if EV_MULTIPLICITY 3702#if EV_MULTIPLICITY
1787 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3703 EV_P = ev_default_loop_ptr = &default_loop_struct;
1788#else 3704#else
1789 ev_default_loop_ptr = 1; 3705 ev_default_loop_ptr = 1;
1790#endif 3706#endif
1791 3707
1792 loop_init (EV_A_ flags); 3708 loop_init (EV_A_ flags);
1793 3709
1794 if (ev_backend (EV_A)) 3710 if (ev_backend (EV_A))
1795 { 3711 {
1796#ifndef _WIN32 3712#if EV_CHILD_ENABLE
1797 ev_signal_init (&childev, childcb, SIGCHLD); 3713 ev_signal_init (&childev, childcb, SIGCHLD);
1798 ev_set_priority (&childev, EV_MAXPRI); 3714 ev_set_priority (&childev, EV_MAXPRI);
1799 ev_signal_start (EV_A_ &childev); 3715 ev_signal_start (EV_A_ &childev);
1800 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3716 ev_unref (EV_A); /* child watcher should not keep loop alive */
1801#endif 3717#endif
… …
1806 3722
1807 return ev_default_loop_ptr; 3723 return ev_default_loop_ptr;
1808} 3724}
1809 3725
1810void 3726void
1811ev_default_destroy (void) 3727ev_loop_fork (EV_P) EV_NOEXCEPT
1812{ 3728{
1813#if EV_MULTIPLICITY 3729 postfork = 1;
1814 struct ev_loop *loop = ev_default_loop_ptr;
1815#endif
1816
1817 ev_default_loop_ptr = 0;
1818
1819#ifndef _WIN32
1820 ev_ref (EV_A); /* child watcher */
1821 ev_signal_stop (EV_A_ &childev);
1822#endif
1823
1824 loop_destroy (EV_A);
1825}
1826
1827void
1828ev_default_fork (void)
1829{
1830#if EV_MULTIPLICITY
1831 struct ev_loop *loop = ev_default_loop_ptr;
1832#endif
1833
1834 postfork = 1; /* must be in line with ev_loop_fork */
1835} 3730}
1836 3731
1837/*****************************************************************************/ 3732/*****************************************************************************/
1838 3733
1839void 3734void
1840ev_invoke (EV_P_ void *w, int revents) 3735ev_invoke (EV_P_ void *w, int revents)
1841{ 3736{
1842 EV_CB_INVOKE ((W)w, revents); 3737 EV_CB_INVOKE ((W)w, revents);
1843} 3738}
1844 3739
1845void noinline 3740unsigned int
3741ev_pending_count (EV_P) EV_NOEXCEPT
3742{
3743 int pri;
3744 unsigned int count = 0;
3745
3746 for (pri = NUMPRI; pri--; )
3747 count += pendingcnt [pri];
3748
3749 return count;
3750}
3751
3752ecb_noinline
3753void
1846ev_invoke_pending (EV_P) 3754ev_invoke_pending (EV_P)
1847{ 3755{
1848 int pri; 3756 pendingpri = NUMPRI;
1849 3757
1850 for (pri = NUMPRI; pri--; ) 3758 do
3759 {
3760 --pendingpri;
3761
3762 /* pendingpri possibly gets modified in the inner loop */
1851 while (pendingcnt [pri]) 3763 while (pendingcnt [pendingpri])
1852 { 3764 {
1853 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3765 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1854 3766
1855 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1856 /* ^ this is no longer true, as pending_w could be here */
1857
1858 p->w->pending = 0; 3767 p->w->pending = 0;
1859 EV_CB_INVOKE (p->w, p->events); 3768 EV_CB_INVOKE (p->w, p->events);
1860 EV_FREQUENT_CHECK; 3769 EV_FREQUENT_CHECK;
1861 } 3770 }
3771 }
3772 while (pendingpri);
1862} 3773}
1863 3774
1864#if EV_IDLE_ENABLE 3775#if EV_IDLE_ENABLE
1865/* make idle watchers pending. this handles the "call-idle */ 3776/* make idle watchers pending. this handles the "call-idle */
1866/* only when higher priorities are idle" logic */ 3777/* only when higher priorities are idle" logic */
1867inline_size void 3778inline_size void
1868idle_reify (EV_P) 3779idle_reify (EV_P)
1869{ 3780{
1870 if (expect_false (idleall)) 3781 if (ecb_expect_false (idleall))
1871 { 3782 {
1872 int pri; 3783 int pri;
1873 3784
1874 for (pri = NUMPRI; pri--; ) 3785 for (pri = NUMPRI; pri--; )
1875 { 3786 {
… …
1905 { 3816 {
1906 ev_at (w) += w->repeat; 3817 ev_at (w) += w->repeat;
1907 if (ev_at (w) < mn_now) 3818 if (ev_at (w) < mn_now)
1908 ev_at (w) = mn_now; 3819 ev_at (w) = mn_now;
1909 3820
1910 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3821 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
1911 3822
1912 ANHE_at_cache (timers [HEAP0]); 3823 ANHE_at_cache (timers [HEAP0]);
1913 downheap (timers, timercnt, HEAP0); 3824 downheap (timers, timercnt, HEAP0);
1914 } 3825 }
1915 else 3826 else
… …
1918 EV_FREQUENT_CHECK; 3829 EV_FREQUENT_CHECK;
1919 feed_reverse (EV_A_ (W)w); 3830 feed_reverse (EV_A_ (W)w);
1920 } 3831 }
1921 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 3832 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1922 3833
1923 feed_reverse_done (EV_A_ EV_TIMEOUT); 3834 feed_reverse_done (EV_A_ EV_TIMER);
1924 } 3835 }
1925} 3836}
1926 3837
1927#if EV_PERIODIC_ENABLE 3838#if EV_PERIODIC_ENABLE
3839
3840ecb_noinline
3841static void
3842periodic_recalc (EV_P_ ev_periodic *w)
3843{
3844 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3845 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3846
3847 /* the above almost always errs on the low side */
3848 while (at <= ev_rt_now)
3849 {
3850 ev_tstamp nat = at + w->interval;
3851
3852 /* when resolution fails us, we use ev_rt_now */
3853 if (ecb_expect_false (nat == at))
3854 {
3855 at = ev_rt_now;
3856 break;
3857 }
3858
3859 at = nat;
3860 }
3861
3862 ev_at (w) = at;
3863}
3864
1928/* make periodics pending */ 3865/* make periodics pending */
1929inline_size void 3866inline_size void
1930periodics_reify (EV_P) 3867periodics_reify (EV_P)
1931{ 3868{
1932 EV_FREQUENT_CHECK; 3869 EV_FREQUENT_CHECK;
1933 3870
1934 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3871 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1935 { 3872 {
1936 int feed_count = 0;
1937
1938 do 3873 do
1939 { 3874 {
1940 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3875 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1941 3876
1942 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3877 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
1951 ANHE_at_cache (periodics [HEAP0]); 3886 ANHE_at_cache (periodics [HEAP0]);
1952 downheap (periodics, periodiccnt, HEAP0); 3887 downheap (periodics, periodiccnt, HEAP0);
1953 } 3888 }
1954 else if (w->interval) 3889 else if (w->interval)
1955 { 3890 {
1956 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3891 periodic_recalc (EV_A_ w);
1957 /* if next trigger time is not sufficiently in the future, put it there */
1958 /* this might happen because of floating point inexactness */
1959 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1960 {
1961 ev_at (w) += w->interval;
1962
1963 /* if interval is unreasonably low we might still have a time in the past */
1964 /* so correct this. this will make the periodic very inexact, but the user */
1965 /* has effectively asked to get triggered more often than possible */
1966 if (ev_at (w) < ev_rt_now)
1967 ev_at (w) = ev_rt_now;
1968 }
1969
1970 ANHE_at_cache (periodics [HEAP0]); 3892 ANHE_at_cache (periodics [HEAP0]);
1971 downheap (periodics, periodiccnt, HEAP0); 3893 downheap (periodics, periodiccnt, HEAP0);
1972 } 3894 }
1973 else 3895 else
1974 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3896 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
1981 feed_reverse_done (EV_A_ EV_PERIODIC); 3903 feed_reverse_done (EV_A_ EV_PERIODIC);
1982 } 3904 }
1983} 3905}
1984 3906
1985/* simply recalculate all periodics */ 3907/* simply recalculate all periodics */
1986/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 3908/* TODO: maybe ensure that at least one event happens when jumping forward? */
1987static void noinline 3909ecb_noinline ecb_cold
3910static void
1988periodics_reschedule (EV_P) 3911periodics_reschedule (EV_P)
1989{ 3912{
1990 int i; 3913 int i;
1991 3914
1992 /* adjust periodics after time jump */ 3915 /* adjust periodics after time jump */
… …
1995 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3918 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1996 3919
1997 if (w->reschedule_cb) 3920 if (w->reschedule_cb)
1998 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3921 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1999 else if (w->interval) 3922 else if (w->interval)
2000 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3923 periodic_recalc (EV_A_ w);
2001 3924
2002 ANHE_at_cache (periodics [i]); 3925 ANHE_at_cache (periodics [i]);
2003 } 3926 }
2004 3927
2005 reheap (periodics, periodiccnt); 3928 reheap (periodics, periodiccnt);
2006} 3929}
2007#endif 3930#endif
2008 3931
2009/* adjust all timers by a given offset */ 3932/* adjust all timers by a given offset */
2010static void noinline 3933ecb_noinline ecb_cold
3934static void
2011timers_reschedule (EV_P_ ev_tstamp adjust) 3935timers_reschedule (EV_P_ ev_tstamp adjust)
2012{ 3936{
2013 int i; 3937 int i;
2014 3938
2015 for (i = 0; i < timercnt; ++i) 3939 for (i = 0; i < timercnt; ++i)
… …
2019 ANHE_at_cache (*he); 3943 ANHE_at_cache (*he);
2020 } 3944 }
2021} 3945}
2022 3946
2023/* fetch new monotonic and realtime times from the kernel */ 3947/* fetch new monotonic and realtime times from the kernel */
2024/* also detetc if there was a timejump, and act accordingly */ 3948/* also detect if there was a timejump, and act accordingly */
2025inline_speed void 3949inline_speed void
2026time_update (EV_P_ ev_tstamp max_block) 3950time_update (EV_P_ ev_tstamp max_block)
2027{ 3951{
2028#if EV_USE_MONOTONIC 3952#if EV_USE_MONOTONIC
2029 if (expect_true (have_monotonic)) 3953 if (ecb_expect_true (have_monotonic))
2030 { 3954 {
2031 int i; 3955 int i;
2032 ev_tstamp odiff = rtmn_diff; 3956 ev_tstamp odiff = rtmn_diff;
2033 3957
2034 mn_now = get_clock (); 3958 mn_now = get_clock ();
2035 3959
2036 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3960 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2037 /* interpolate in the meantime */ 3961 /* interpolate in the meantime */
2038 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3962 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
2039 { 3963 {
2040 ev_rt_now = rtmn_diff + mn_now; 3964 ev_rt_now = rtmn_diff + mn_now;
2041 return; 3965 return;
2042 } 3966 }
2043 3967
… …
2052 * doesn't hurt either as we only do this on time-jumps or 3976 * doesn't hurt either as we only do this on time-jumps or
2053 * in the unlikely event of having been preempted here. 3977 * in the unlikely event of having been preempted here.
2054 */ 3978 */
2055 for (i = 4; --i; ) 3979 for (i = 4; --i; )
2056 { 3980 {
3981 ev_tstamp diff;
2057 rtmn_diff = ev_rt_now - mn_now; 3982 rtmn_diff = ev_rt_now - mn_now;
2058 3983
2059 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3984 diff = odiff - rtmn_diff;
3985
3986 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
2060 return; /* all is well */ 3987 return; /* all is well */
2061 3988
2062 ev_rt_now = ev_time (); 3989 ev_rt_now = ev_time ();
2063 mn_now = get_clock (); 3990 mn_now = get_clock ();
2064 now_floor = mn_now; 3991 now_floor = mn_now;
… …
2073 else 4000 else
2074#endif 4001#endif
2075 { 4002 {
2076 ev_rt_now = ev_time (); 4003 ev_rt_now = ev_time ();
2077 4004
2078 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 4005 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
2079 { 4006 {
2080 /* adjust timers. this is easy, as the offset is the same for all of them */ 4007 /* adjust timers. this is easy, as the offset is the same for all of them */
2081 timers_reschedule (EV_A_ ev_rt_now - mn_now); 4008 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2082#if EV_PERIODIC_ENABLE 4009#if EV_PERIODIC_ENABLE
2083 periodics_reschedule (EV_A); 4010 periodics_reschedule (EV_A);
… …
2086 4013
2087 mn_now = ev_rt_now; 4014 mn_now = ev_rt_now;
2088 } 4015 }
2089} 4016}
2090 4017
2091void 4018int
2092ev_loop (EV_P_ int flags) 4019ev_run (EV_P_ int flags)
2093{ 4020{
2094#if EV_MINIMAL < 2 4021#if EV_FEATURE_API
2095 ++loop_depth; 4022 ++loop_depth;
2096#endif 4023#endif
2097 4024
2098 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 4025 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2099 4026
2100 loop_done = EVUNLOOP_CANCEL; 4027 loop_done = EVBREAK_CANCEL;
2101 4028
2102 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 4029 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2103 4030
2104 do 4031 do
2105 { 4032 {
2106#if EV_VERIFY >= 2 4033#if EV_VERIFY >= 2
2107 ev_loop_verify (EV_A); 4034 ev_verify (EV_A);
2108#endif 4035#endif
2109 4036
2110#ifndef _WIN32 4037#ifndef _WIN32
2111 if (expect_false (curpid)) /* penalise the forking check even more */ 4038 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2112 if (expect_false (getpid () != curpid)) 4039 if (ecb_expect_false (getpid () != curpid))
2113 { 4040 {
2114 curpid = getpid (); 4041 curpid = getpid ();
2115 postfork = 1; 4042 postfork = 1;
2116 } 4043 }
2117#endif 4044#endif
2118 4045
2119#if EV_FORK_ENABLE 4046#if EV_FORK_ENABLE
2120 /* we might have forked, so queue fork handlers */ 4047 /* we might have forked, so queue fork handlers */
2121 if (expect_false (postfork)) 4048 if (ecb_expect_false (postfork))
2122 if (forkcnt) 4049 if (forkcnt)
2123 { 4050 {
2124 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 4051 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2125 EV_INVOKE_PENDING; 4052 EV_INVOKE_PENDING;
2126 } 4053 }
2127#endif 4054#endif
2128 4055
4056#if EV_PREPARE_ENABLE
2129 /* queue prepare watchers (and execute them) */ 4057 /* queue prepare watchers (and execute them) */
2130 if (expect_false (preparecnt)) 4058 if (ecb_expect_false (preparecnt))
2131 { 4059 {
2132 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 4060 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2133 EV_INVOKE_PENDING; 4061 EV_INVOKE_PENDING;
2134 } 4062 }
4063#endif
2135 4064
2136 if (expect_false (loop_done)) 4065 if (ecb_expect_false (loop_done))
2137 break; 4066 break;
2138 4067
2139 /* we might have forked, so reify kernel state if necessary */ 4068 /* we might have forked, so reify kernel state if necessary */
2140 if (expect_false (postfork)) 4069 if (ecb_expect_false (postfork))
2141 loop_fork (EV_A); 4070 loop_fork (EV_A);
2142 4071
2143 /* update fd-related kernel structures */ 4072 /* update fd-related kernel structures */
2144 fd_reify (EV_A); 4073 fd_reify (EV_A);
2145 4074
2146 /* calculate blocking time */ 4075 /* calculate blocking time */
2147 { 4076 {
2148 ev_tstamp waittime = 0.; 4077 ev_tstamp waittime = 0.;
2149 ev_tstamp sleeptime = 0.; 4078 ev_tstamp sleeptime = 0.;
2150 4079
4080 /* remember old timestamp for io_blocktime calculation */
4081 ev_tstamp prev_mn_now = mn_now;
4082
4083 /* update time to cancel out callback processing overhead */
4084 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
4085
4086 /* from now on, we want a pipe-wake-up */
4087 pipe_write_wanted = 1;
4088
4089 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
4090
2151 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 4091 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2152 { 4092 {
2153 /* remember old timestamp for io_blocktime calculation */
2154 ev_tstamp prev_mn_now = mn_now;
2155
2156 /* update time to cancel out callback processing overhead */
2157 time_update (EV_A_ 1e100);
2158
2159 waittime = MAX_BLOCKTIME; 4093 waittime = EV_TS_CONST (MAX_BLOCKTIME);
4094
4095#if EV_USE_TIMERFD
4096 /* sleep a lot longer when we can reliably detect timejumps */
4097 if (ecb_expect_true (timerfd >= 0))
4098 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4099#endif
2160 4100
2161 if (timercnt) 4101 if (timercnt)
2162 { 4102 {
2163 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 4103 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2164 if (waittime > to) waittime = to; 4104 if (waittime > to) waittime = to;
2165 } 4105 }
2166 4106
2167#if EV_PERIODIC_ENABLE 4107#if EV_PERIODIC_ENABLE
2168 if (periodiccnt) 4108 if (periodiccnt)
2169 { 4109 {
2170 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 4110 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2171 if (waittime > to) waittime = to; 4111 if (waittime > to) waittime = to;
2172 } 4112 }
2173#endif 4113#endif
2174 4114
2175 /* don't let timeouts decrease the waittime below timeout_blocktime */ 4115 /* don't let timeouts decrease the waittime below timeout_blocktime */
2176 if (expect_false (waittime < timeout_blocktime)) 4116 if (ecb_expect_false (waittime < timeout_blocktime))
2177 waittime = timeout_blocktime; 4117 waittime = timeout_blocktime;
2178 4118
4119 /* now there are two more special cases left, either we have
4120 * already-expired timers, so we should not sleep, or we have timers
4121 * that expire very soon, in which case we need to wait for a minimum
4122 * amount of time for some event loop backends.
4123 */
4124 if (ecb_expect_false (waittime < backend_mintime))
4125 waittime = waittime <= EV_TS_CONST (0.)
4126 ? EV_TS_CONST (0.)
4127 : backend_mintime;
4128
2179 /* extra check because io_blocktime is commonly 0 */ 4129 /* extra check because io_blocktime is commonly 0 */
2180 if (expect_false (io_blocktime)) 4130 if (ecb_expect_false (io_blocktime))
2181 { 4131 {
2182 sleeptime = io_blocktime - (mn_now - prev_mn_now); 4132 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2183 4133
2184 if (sleeptime > waittime - backend_fudge) 4134 if (sleeptime > waittime - backend_mintime)
2185 sleeptime = waittime - backend_fudge; 4135 sleeptime = waittime - backend_mintime;
2186 4136
2187 if (expect_true (sleeptime > 0.)) 4137 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2188 { 4138 {
2189 ev_sleep (sleeptime); 4139 ev_sleep (sleeptime);
2190 waittime -= sleeptime; 4140 waittime -= sleeptime;
2191 } 4141 }
2192 } 4142 }
2193 } 4143 }
2194 4144
2195#if EV_MINIMAL < 2 4145#if EV_FEATURE_API
2196 ++loop_count; 4146 ++loop_count;
2197#endif 4147#endif
2198 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 4148 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2199 backend_poll (EV_A_ waittime); 4149 backend_poll (EV_A_ waittime);
2200 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 4150 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
4151
4152 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
4153
4154 ECB_MEMORY_FENCE_ACQUIRE;
4155 if (pipe_write_skipped)
4156 {
4157 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
4158 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
4159 }
2201 4160
2202 /* update ev_rt_now, do magic */ 4161 /* update ev_rt_now, do magic */
2203 time_update (EV_A_ waittime + sleeptime); 4162 time_update (EV_A_ waittime + sleeptime);
2204 } 4163 }
2205 4164
… …
2212#if EV_IDLE_ENABLE 4171#if EV_IDLE_ENABLE
2213 /* queue idle watchers unless other events are pending */ 4172 /* queue idle watchers unless other events are pending */
2214 idle_reify (EV_A); 4173 idle_reify (EV_A);
2215#endif 4174#endif
2216 4175
4176#if EV_CHECK_ENABLE
2217 /* queue check watchers, to be executed first */ 4177 /* queue check watchers, to be executed first */
2218 if (expect_false (checkcnt)) 4178 if (ecb_expect_false (checkcnt))
2219 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 4179 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
4180#endif
2220 4181
2221 EV_INVOKE_PENDING; 4182 EV_INVOKE_PENDING;
2222 } 4183 }
2223 while (expect_true ( 4184 while (ecb_expect_true (
2224 activecnt 4185 activecnt
2225 && !loop_done 4186 && !loop_done
2226 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 4187 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2227 )); 4188 ));
2228 4189
2229 if (loop_done == EVUNLOOP_ONE) 4190 if (loop_done == EVBREAK_ONE)
2230 loop_done = EVUNLOOP_CANCEL; 4191 loop_done = EVBREAK_CANCEL;
2231 4192
2232#if EV_MINIMAL < 2 4193#if EV_FEATURE_API
2233 --loop_depth; 4194 --loop_depth;
2234#endif 4195#endif
4196
4197 return activecnt;
2235} 4198}
2236 4199
2237void 4200void
2238ev_unloop (EV_P_ int how) 4201ev_break (EV_P_ int how) EV_NOEXCEPT
2239{ 4202{
2240 loop_done = how; 4203 loop_done = how;
2241} 4204}
2242 4205
2243void 4206void
2244ev_ref (EV_P) 4207ev_ref (EV_P) EV_NOEXCEPT
2245{ 4208{
2246 ++activecnt; 4209 ++activecnt;
2247} 4210}
2248 4211
2249void 4212void
2250ev_unref (EV_P) 4213ev_unref (EV_P) EV_NOEXCEPT
2251{ 4214{
2252 --activecnt; 4215 --activecnt;
2253} 4216}
2254 4217
2255void 4218void
2256ev_now_update (EV_P) 4219ev_now_update (EV_P) EV_NOEXCEPT
2257{ 4220{
2258 time_update (EV_A_ 1e100); 4221 time_update (EV_A_ EV_TSTAMP_HUGE);
2259} 4222}
2260 4223
2261void 4224void
2262ev_suspend (EV_P) 4225ev_suspend (EV_P) EV_NOEXCEPT
2263{ 4226{
2264 ev_now_update (EV_A); 4227 ev_now_update (EV_A);
2265} 4228}
2266 4229
2267void 4230void
2268ev_resume (EV_P) 4231ev_resume (EV_P) EV_NOEXCEPT
2269{ 4232{
2270 ev_tstamp mn_prev = mn_now; 4233 ev_tstamp mn_prev = mn_now;
2271 4234
2272 ev_now_update (EV_A); 4235 ev_now_update (EV_A);
2273 timers_reschedule (EV_A_ mn_now - mn_prev); 4236 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2290inline_size void 4253inline_size void
2291wlist_del (WL *head, WL elem) 4254wlist_del (WL *head, WL elem)
2292{ 4255{
2293 while (*head) 4256 while (*head)
2294 { 4257 {
2295 if (*head == elem) 4258 if (ecb_expect_true (*head == elem))
2296 { 4259 {
2297 *head = elem->next; 4260 *head = elem->next;
2298 return; 4261 break;
2299 } 4262 }
2300 4263
2301 head = &(*head)->next; 4264 head = &(*head)->next;
2302 } 4265 }
2303} 4266}
… …
2312 w->pending = 0; 4275 w->pending = 0;
2313 } 4276 }
2314} 4277}
2315 4278
2316int 4279int
2317ev_clear_pending (EV_P_ void *w) 4280ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2318{ 4281{
2319 W w_ = (W)w; 4282 W w_ = (W)w;
2320 int pending = w_->pending; 4283 int pending = w_->pending;
2321 4284
2322 if (expect_true (pending)) 4285 if (ecb_expect_true (pending))
2323 { 4286 {
2324 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4287 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2325 p->w = (W)&pending_w; 4288 p->w = (W)&pending_w;
2326 w_->pending = 0; 4289 w_->pending = 0;
2327 return p->events; 4290 return p->events;
… …
2354 w->active = 0; 4317 w->active = 0;
2355} 4318}
2356 4319
2357/*****************************************************************************/ 4320/*****************************************************************************/
2358 4321
2359void noinline 4322ecb_noinline
4323void
2360ev_io_start (EV_P_ ev_io *w) 4324ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2361{ 4325{
2362 int fd = w->fd; 4326 int fd = w->fd;
2363 4327
2364 if (expect_false (ev_is_active (w))) 4328 if (ecb_expect_false (ev_is_active (w)))
2365 return; 4329 return;
2366 4330
2367 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4331 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2368 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4332 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2369 4333
4334#if EV_VERIFY >= 2
4335 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4336#endif
2370 EV_FREQUENT_CHECK; 4337 EV_FREQUENT_CHECK;
2371 4338
2372 ev_start (EV_A_ (W)w, 1); 4339 ev_start (EV_A_ (W)w, 1);
2373 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4340 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2374 wlist_add (&anfds[fd].head, (WL)w); 4341 wlist_add (&anfds[fd].head, (WL)w);
4342
4343 /* common bug, apparently */
4344 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2375 4345
2376 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 4346 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2377 w->events &= ~EV__IOFDSET; 4347 w->events &= ~EV__IOFDSET;
2378 4348
2379 EV_FREQUENT_CHECK; 4349 EV_FREQUENT_CHECK;
2380} 4350}
2381 4351
2382void noinline 4352ecb_noinline
4353void
2383ev_io_stop (EV_P_ ev_io *w) 4354ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2384{ 4355{
2385 clear_pending (EV_A_ (W)w); 4356 clear_pending (EV_A_ (W)w);
2386 if (expect_false (!ev_is_active (w))) 4357 if (ecb_expect_false (!ev_is_active (w)))
2387 return; 4358 return;
2388 4359
2389 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4360 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2390 4361
4362#if EV_VERIFY >= 2
4363 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4364#endif
2391 EV_FREQUENT_CHECK; 4365 EV_FREQUENT_CHECK;
2392 4366
2393 wlist_del (&anfds[w->fd].head, (WL)w); 4367 wlist_del (&anfds[w->fd].head, (WL)w);
2394 ev_stop (EV_A_ (W)w); 4368 ev_stop (EV_A_ (W)w);
2395 4369
2396 fd_change (EV_A_ w->fd, 1); 4370 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2397 4371
2398 EV_FREQUENT_CHECK; 4372 EV_FREQUENT_CHECK;
2399} 4373}
2400 4374
2401void noinline 4375ecb_noinline
4376void
2402ev_timer_start (EV_P_ ev_timer *w) 4377ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2403{ 4378{
2404 if (expect_false (ev_is_active (w))) 4379 if (ecb_expect_false (ev_is_active (w)))
2405 return; 4380 return;
2406 4381
2407 ev_at (w) += mn_now; 4382 ev_at (w) += mn_now;
2408 4383
2409 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4384 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2410 4385
2411 EV_FREQUENT_CHECK; 4386 EV_FREQUENT_CHECK;
2412 4387
2413 ++timercnt; 4388 ++timercnt;
2414 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4389 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2415 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4390 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2416 ANHE_w (timers [ev_active (w)]) = (WT)w; 4391 ANHE_w (timers [ev_active (w)]) = (WT)w;
2417 ANHE_at_cache (timers [ev_active (w)]); 4392 ANHE_at_cache (timers [ev_active (w)]);
2418 upheap (timers, ev_active (w)); 4393 upheap (timers, ev_active (w));
2419 4394
2420 EV_FREQUENT_CHECK; 4395 EV_FREQUENT_CHECK;
2421 4396
2422 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4397 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2423} 4398}
2424 4399
2425void noinline 4400ecb_noinline
4401void
2426ev_timer_stop (EV_P_ ev_timer *w) 4402ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2427{ 4403{
2428 clear_pending (EV_A_ (W)w); 4404 clear_pending (EV_A_ (W)w);
2429 if (expect_false (!ev_is_active (w))) 4405 if (ecb_expect_false (!ev_is_active (w)))
2430 return; 4406 return;
2431 4407
2432 EV_FREQUENT_CHECK; 4408 EV_FREQUENT_CHECK;
2433 4409
2434 { 4410 {
… …
2436 4412
2437 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4413 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2438 4414
2439 --timercnt; 4415 --timercnt;
2440 4416
2441 if (expect_true (active < timercnt + HEAP0)) 4417 if (ecb_expect_true (active < timercnt + HEAP0))
2442 { 4418 {
2443 timers [active] = timers [timercnt + HEAP0]; 4419 timers [active] = timers [timercnt + HEAP0];
2444 adjustheap (timers, timercnt, active); 4420 adjustheap (timers, timercnt, active);
2445 } 4421 }
2446 } 4422 }
2447 4423
4424 ev_at (w) -= mn_now;
4425
4426 ev_stop (EV_A_ (W)w);
4427
2448 EV_FREQUENT_CHECK; 4428 EV_FREQUENT_CHECK;
2449
2450 ev_at (w) -= mn_now;
2451
2452 ev_stop (EV_A_ (W)w);
2453} 4429}
2454 4430
2455void noinline 4431ecb_noinline
4432void
2456ev_timer_again (EV_P_ ev_timer *w) 4433ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2457{ 4434{
2458 EV_FREQUENT_CHECK; 4435 EV_FREQUENT_CHECK;
4436
4437 clear_pending (EV_A_ (W)w);
2459 4438
2460 if (ev_is_active (w)) 4439 if (ev_is_active (w))
2461 { 4440 {
2462 if (w->repeat) 4441 if (w->repeat)
2463 { 4442 {
… …
2475 } 4454 }
2476 4455
2477 EV_FREQUENT_CHECK; 4456 EV_FREQUENT_CHECK;
2478} 4457}
2479 4458
4459ev_tstamp
4460ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4461{
4462 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
4463}
4464
2480#if EV_PERIODIC_ENABLE 4465#if EV_PERIODIC_ENABLE
2481void noinline 4466ecb_noinline
4467void
2482ev_periodic_start (EV_P_ ev_periodic *w) 4468ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2483{ 4469{
2484 if (expect_false (ev_is_active (w))) 4470 if (ecb_expect_false (ev_is_active (w)))
2485 return; 4471 return;
4472
4473#if EV_USE_TIMERFD
4474 if (timerfd == -2)
4475 evtimerfd_init (EV_A);
4476#endif
2486 4477
2487 if (w->reschedule_cb) 4478 if (w->reschedule_cb)
2488 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4479 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2489 else if (w->interval) 4480 else if (w->interval)
2490 { 4481 {
2491 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4482 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2492 /* this formula differs from the one in periodic_reify because we do not always round up */ 4483 periodic_recalc (EV_A_ w);
2493 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2494 } 4484 }
2495 else 4485 else
2496 ev_at (w) = w->offset; 4486 ev_at (w) = w->offset;
2497 4487
2498 EV_FREQUENT_CHECK; 4488 EV_FREQUENT_CHECK;
2499 4489
2500 ++periodiccnt; 4490 ++periodiccnt;
2501 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4491 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2502 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4492 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2503 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4493 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2504 ANHE_at_cache (periodics [ev_active (w)]); 4494 ANHE_at_cache (periodics [ev_active (w)]);
2505 upheap (periodics, ev_active (w)); 4495 upheap (periodics, ev_active (w));
2506 4496
2507 EV_FREQUENT_CHECK; 4497 EV_FREQUENT_CHECK;
2508 4498
2509 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4499 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2510} 4500}
2511 4501
2512void noinline 4502ecb_noinline
4503void
2513ev_periodic_stop (EV_P_ ev_periodic *w) 4504ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2514{ 4505{
2515 clear_pending (EV_A_ (W)w); 4506 clear_pending (EV_A_ (W)w);
2516 if (expect_false (!ev_is_active (w))) 4507 if (ecb_expect_false (!ev_is_active (w)))
2517 return; 4508 return;
2518 4509
2519 EV_FREQUENT_CHECK; 4510 EV_FREQUENT_CHECK;
2520 4511
2521 { 4512 {
… …
2523 4514
2524 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4515 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2525 4516
2526 --periodiccnt; 4517 --periodiccnt;
2527 4518
2528 if (expect_true (active < periodiccnt + HEAP0)) 4519 if (ecb_expect_true (active < periodiccnt + HEAP0))
2529 { 4520 {
2530 periodics [active] = periodics [periodiccnt + HEAP0]; 4521 periodics [active] = periodics [periodiccnt + HEAP0];
2531 adjustheap (periodics, periodiccnt, active); 4522 adjustheap (periodics, periodiccnt, active);
2532 } 4523 }
2533 } 4524 }
2534 4525
4526 ev_stop (EV_A_ (W)w);
4527
2535 EV_FREQUENT_CHECK; 4528 EV_FREQUENT_CHECK;
2536
2537 ev_stop (EV_A_ (W)w);
2538} 4529}
2539 4530
2540void noinline 4531ecb_noinline
4532void
2541ev_periodic_again (EV_P_ ev_periodic *w) 4533ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2542{ 4534{
2543 /* TODO: use adjustheap and recalculation */ 4535 /* TODO: use adjustheap and recalculation */
2544 ev_periodic_stop (EV_A_ w); 4536 ev_periodic_stop (EV_A_ w);
2545 ev_periodic_start (EV_A_ w); 4537 ev_periodic_start (EV_A_ w);
2546} 4538}
… …
2548 4540
2549#ifndef SA_RESTART 4541#ifndef SA_RESTART
2550# define SA_RESTART 0 4542# define SA_RESTART 0
2551#endif 4543#endif
2552 4544
2553void noinline 4545#if EV_SIGNAL_ENABLE
4546
4547ecb_noinline
4548void
2554ev_signal_start (EV_P_ ev_signal *w) 4549ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2555{ 4550{
4551 if (ecb_expect_false (ev_is_active (w)))
4552 return;
4553
4554 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
4555
2556#if EV_MULTIPLICITY 4556#if EV_MULTIPLICITY
2557 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4557 assert (("libev: a signal must not be attached to two different loops",
2558#endif 4558 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2559 if (expect_false (ev_is_active (w)))
2560 return;
2561 4559
2562 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0)); 4560 signals [w->signum - 1].loop = EV_A;
2563 4561 ECB_MEMORY_FENCE_RELEASE;
2564 evpipe_init (EV_A); 4562#endif
2565 4563
2566 EV_FREQUENT_CHECK; 4564 EV_FREQUENT_CHECK;
2567 4565
4566#if EV_USE_SIGNALFD
4567 if (sigfd == -2)
2568 { 4568 {
2569#ifndef _WIN32 4569 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2570 sigset_t full, prev; 4570 if (sigfd < 0 && errno == EINVAL)
2571 sigfillset (&full); 4571 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2572 sigprocmask (SIG_SETMASK, &full, &prev);
2573#endif
2574 4572
2575 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); 4573 if (sigfd >= 0)
4574 {
4575 fd_intern (sigfd); /* doing it twice will not hurt */
2576 4576
2577#ifndef _WIN32 4577 sigemptyset (&sigfd_set);
2578 sigprocmask (SIG_SETMASK, &prev, 0); 4578
2579#endif 4579 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4580 ev_set_priority (&sigfd_w, EV_MAXPRI);
4581 ev_io_start (EV_A_ &sigfd_w);
4582 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4583 }
2580 } 4584 }
4585
4586 if (sigfd >= 0)
4587 {
4588 /* TODO: check .head */
4589 sigaddset (&sigfd_set, w->signum);
4590 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4591
4592 signalfd (sigfd, &sigfd_set, 0);
4593 }
4594#endif
2581 4595
2582 ev_start (EV_A_ (W)w, 1); 4596 ev_start (EV_A_ (W)w, 1);
2583 wlist_add (&signals [w->signum - 1].head, (WL)w); 4597 wlist_add (&signals [w->signum - 1].head, (WL)w);
2584 4598
2585 if (!((WL)w)->next) 4599 if (!((WL)w)->next)
4600# if EV_USE_SIGNALFD
4601 if (sigfd < 0) /*TODO*/
4602# endif
2586 { 4603 {
2587#if _WIN32 4604# ifdef _WIN32
4605 evpipe_init (EV_A);
4606
2588 signal (w->signum, ev_sighandler); 4607 signal (w->signum, ev_sighandler);
2589#else 4608# else
2590 struct sigaction sa; 4609 struct sigaction sa;
4610
4611 evpipe_init (EV_A);
4612
2591 sa.sa_handler = ev_sighandler; 4613 sa.sa_handler = ev_sighandler;
2592 sigfillset (&sa.sa_mask); 4614 sigfillset (&sa.sa_mask);
2593 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4615 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2594 sigaction (w->signum, &sa, 0); 4616 sigaction (w->signum, &sa, 0);
4617
4618 if (origflags & EVFLAG_NOSIGMASK)
4619 {
4620 sigemptyset (&sa.sa_mask);
4621 sigaddset (&sa.sa_mask, w->signum);
4622 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4623 }
2595#endif 4624#endif
2596 } 4625 }
2597 4626
2598 EV_FREQUENT_CHECK; 4627 EV_FREQUENT_CHECK;
2599} 4628}
2600 4629
2601void noinline 4630ecb_noinline
4631void
2602ev_signal_stop (EV_P_ ev_signal *w) 4632ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2603{ 4633{
2604 clear_pending (EV_A_ (W)w); 4634 clear_pending (EV_A_ (W)w);
2605 if (expect_false (!ev_is_active (w))) 4635 if (ecb_expect_false (!ev_is_active (w)))
2606 return; 4636 return;
2607 4637
2608 EV_FREQUENT_CHECK; 4638 EV_FREQUENT_CHECK;
2609 4639
2610 wlist_del (&signals [w->signum - 1].head, (WL)w); 4640 wlist_del (&signals [w->signum - 1].head, (WL)w);
2611 ev_stop (EV_A_ (W)w); 4641 ev_stop (EV_A_ (W)w);
2612 4642
2613 if (!signals [w->signum - 1].head) 4643 if (!signals [w->signum - 1].head)
4644 {
4645#if EV_MULTIPLICITY
4646 signals [w->signum - 1].loop = 0; /* unattach from signal */
4647#endif
4648#if EV_USE_SIGNALFD
4649 if (sigfd >= 0)
4650 {
4651 sigset_t ss;
4652
4653 sigemptyset (&ss);
4654 sigaddset (&ss, w->signum);
4655 sigdelset (&sigfd_set, w->signum);
4656
4657 signalfd (sigfd, &sigfd_set, 0);
4658 sigprocmask (SIG_UNBLOCK, &ss, 0);
4659 }
4660 else
4661#endif
2614 signal (w->signum, SIG_DFL); 4662 signal (w->signum, SIG_DFL);
4663 }
2615 4664
2616 EV_FREQUENT_CHECK; 4665 EV_FREQUENT_CHECK;
2617} 4666}
2618 4667
4668#endif
4669
4670#if EV_CHILD_ENABLE
4671
2619void 4672void
2620ev_child_start (EV_P_ ev_child *w) 4673ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2621{ 4674{
2622#if EV_MULTIPLICITY 4675#if EV_MULTIPLICITY
2623 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4676 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2624#endif 4677#endif
2625 if (expect_false (ev_is_active (w))) 4678 if (ecb_expect_false (ev_is_active (w)))
2626 return; 4679 return;
2627 4680
2628 EV_FREQUENT_CHECK; 4681 EV_FREQUENT_CHECK;
2629 4682
2630 ev_start (EV_A_ (W)w, 1); 4683 ev_start (EV_A_ (W)w, 1);
2631 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4684 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2632 4685
2633 EV_FREQUENT_CHECK; 4686 EV_FREQUENT_CHECK;
2634} 4687}
2635 4688
2636void 4689void
2637ev_child_stop (EV_P_ ev_child *w) 4690ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2638{ 4691{
2639 clear_pending (EV_A_ (W)w); 4692 clear_pending (EV_A_ (W)w);
2640 if (expect_false (!ev_is_active (w))) 4693 if (ecb_expect_false (!ev_is_active (w)))
2641 return; 4694 return;
2642 4695
2643 EV_FREQUENT_CHECK; 4696 EV_FREQUENT_CHECK;
2644 4697
2645 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4698 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2646 ev_stop (EV_A_ (W)w); 4699 ev_stop (EV_A_ (W)w);
2647 4700
2648 EV_FREQUENT_CHECK; 4701 EV_FREQUENT_CHECK;
2649} 4702}
4703
4704#endif
2650 4705
2651#if EV_STAT_ENABLE 4706#if EV_STAT_ENABLE
2652 4707
2653# ifdef _WIN32 4708# ifdef _WIN32
2654# undef lstat 4709# undef lstat
… …
2657 4712
2658#define DEF_STAT_INTERVAL 5.0074891 4713#define DEF_STAT_INTERVAL 5.0074891
2659#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4714#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2660#define MIN_STAT_INTERVAL 0.1074891 4715#define MIN_STAT_INTERVAL 0.1074891
2661 4716
2662static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4717ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2663 4718
2664#if EV_USE_INOTIFY 4719#if EV_USE_INOTIFY
2665# define EV_INOTIFY_BUFSIZE 8192
2666 4720
2667static void noinline 4721/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4722# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4723
4724ecb_noinline
4725static void
2668infy_add (EV_P_ ev_stat *w) 4726infy_add (EV_P_ ev_stat *w)
2669{ 4727{
2670 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); 4728 w->wd = inotify_add_watch (fs_fd, w->path,
4729 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4730 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4731 | IN_DONT_FOLLOW | IN_MASK_ADD);
2671 4732
2672 if (w->wd < 0) 4733 if (w->wd >= 0)
4734 {
4735 struct statfs sfs;
4736
4737 /* now local changes will be tracked by inotify, but remote changes won't */
4738 /* unless the filesystem is known to be local, we therefore still poll */
4739 /* also do poll on <2.6.25, but with normal frequency */
4740
4741 if (!fs_2625)
4742 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4743 else if (!statfs (w->path, &sfs)
4744 && (sfs.f_type == 0x1373 /* devfs */
4745 || sfs.f_type == 0x4006 /* fat */
4746 || sfs.f_type == 0x4d44 /* msdos */
4747 || sfs.f_type == 0xEF53 /* ext2/3 */
4748 || sfs.f_type == 0x72b6 /* jffs2 */
4749 || sfs.f_type == 0x858458f6 /* ramfs */
4750 || sfs.f_type == 0x5346544e /* ntfs */
4751 || sfs.f_type == 0x3153464a /* jfs */
4752 || sfs.f_type == 0x9123683e /* btrfs */
4753 || sfs.f_type == 0x52654973 /* reiser3 */
4754 || sfs.f_type == 0x01021994 /* tmpfs */
4755 || sfs.f_type == 0x58465342 /* xfs */))
4756 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4757 else
4758 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2673 { 4759 }
4760 else
4761 {
4762 /* can't use inotify, continue to stat */
2674 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4763 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2675 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2676 4764
2677 /* monitor some parent directory for speedup hints */ 4765 /* if path is not there, monitor some parent directory for speedup hints */
2678 /* note that exceeding the hardcoded path limit is not a correctness issue, */ 4766 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2679 /* but an efficiency issue only */ 4767 /* but an efficiency issue only */
2680 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4768 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2681 { 4769 {
2682 char path [4096]; 4770 char path [4096];
… …
2692 if (!pend || pend == path) 4780 if (!pend || pend == path)
2693 break; 4781 break;
2694 4782
2695 *pend = 0; 4783 *pend = 0;
2696 w->wd = inotify_add_watch (fs_fd, path, mask); 4784 w->wd = inotify_add_watch (fs_fd, path, mask);
2697 } 4785 }
2698 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4786 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2699 } 4787 }
2700 } 4788 }
2701 4789
2702 if (w->wd >= 0) 4790 if (w->wd >= 0)
2703 {
2704 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4791 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2705 4792
2706 /* now local changes will be tracked by inotify, but remote changes won't */ 4793 /* now re-arm timer, if required */
2707 /* unless the filesystem it known to be local, we therefore still poll */ 4794 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2708 /* also do poll on <2.6.25, but with normal frequency */
2709 struct statfs sfs;
2710
2711 if (fs_2625 && !statfs (w->path, &sfs))
2712 if (sfs.f_type == 0x1373 /* devfs */
2713 || sfs.f_type == 0xEF53 /* ext2/3 */
2714 || sfs.f_type == 0x3153464a /* jfs */
2715 || sfs.f_type == 0x52654973 /* reiser3 */
2716 || sfs.f_type == 0x01021994 /* tempfs */
2717 || sfs.f_type == 0x58465342 /* xfs */)
2718 return;
2719
2720 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2721 ev_timer_again (EV_A_ &w->timer); 4795 ev_timer_again (EV_A_ &w->timer);
2722 } 4796 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2723} 4797}
2724 4798
2725static void noinline 4799ecb_noinline
4800static void
2726infy_del (EV_P_ ev_stat *w) 4801infy_del (EV_P_ ev_stat *w)
2727{ 4802{
2728 int slot; 4803 int slot;
2729 int wd = w->wd; 4804 int wd = w->wd;
2730 4805
2731 if (wd < 0) 4806 if (wd < 0)
2732 return; 4807 return;
2733 4808
2734 w->wd = -2; 4809 w->wd = -2;
2735 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4810 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2736 wlist_del (&fs_hash [slot].head, (WL)w); 4811 wlist_del (&fs_hash [slot].head, (WL)w);
2737 4812
2738 /* remove this watcher, if others are watching it, they will rearm */ 4813 /* remove this watcher, if others are watching it, they will rearm */
2739 inotify_rm_watch (fs_fd, wd); 4814 inotify_rm_watch (fs_fd, wd);
2740} 4815}
2741 4816
2742static void noinline 4817ecb_noinline
4818static void
2743infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4819infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2744{ 4820{
2745 if (slot < 0) 4821 if (slot < 0)
2746 /* overflow, need to check for all hash slots */ 4822 /* overflow, need to check for all hash slots */
2747 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4823 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2748 infy_wd (EV_A_ slot, wd, ev); 4824 infy_wd (EV_A_ slot, wd, ev);
2749 else 4825 else
2750 { 4826 {
2751 WL w_; 4827 WL w_;
2752 4828
2753 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4829 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2754 { 4830 {
2755 ev_stat *w = (ev_stat *)w_; 4831 ev_stat *w = (ev_stat *)w_;
2756 w_ = w_->next; /* lets us remove this watcher and all before it */ 4832 w_ = w_->next; /* lets us remove this watcher and all before it */
2757 4833
2758 if (w->wd == wd || wd == -1) 4834 if (w->wd == wd || wd == -1)
2759 { 4835 {
2760 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4836 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2761 { 4837 {
2762 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4838 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2763 w->wd = -1; 4839 w->wd = -1;
2764 infy_add (EV_A_ w); /* re-add, no matter what */ 4840 infy_add (EV_A_ w); /* re-add, no matter what */
2765 } 4841 }
2766 4842
2767 stat_timer_cb (EV_A_ &w->timer, 0); 4843 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2772 4848
2773static void 4849static void
2774infy_cb (EV_P_ ev_io *w, int revents) 4850infy_cb (EV_P_ ev_io *w, int revents)
2775{ 4851{
2776 char buf [EV_INOTIFY_BUFSIZE]; 4852 char buf [EV_INOTIFY_BUFSIZE];
2777 struct inotify_event *ev = (struct inotify_event *)buf;
2778 int ofs; 4853 int ofs;
2779 int len = read (fs_fd, buf, sizeof (buf)); 4854 int len = read (fs_fd, buf, sizeof (buf));
2780 4855
2781 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4856 for (ofs = 0; ofs < len; )
4857 {
4858 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2782 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4859 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4860 ofs += sizeof (struct inotify_event) + ev->len;
4861 }
2783} 4862}
2784 4863
2785inline_size void 4864inline_size ecb_cold
4865void
2786check_2625 (EV_P) 4866ev_check_2625 (EV_P)
2787{ 4867{
2788 /* kernels < 2.6.25 are borked 4868 /* kernels < 2.6.25 are borked
2789 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4869 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2790 */ 4870 */
2791 struct utsname buf; 4871 if (ev_linux_version () < 0x020619)
2792 int major, minor, micro;
2793
2794 if (uname (&buf))
2795 return; 4872 return;
2796 4873
2797 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2798 return;
2799
2800 if (major < 2
2801 || (major == 2 && minor < 6)
2802 || (major == 2 && minor == 6 && micro < 25))
2803 return;
2804
2805 fs_2625 = 1; 4874 fs_2625 = 1;
4875}
4876
4877inline_size int
4878infy_newfd (void)
4879{
4880#if defined IN_CLOEXEC && defined IN_NONBLOCK
4881 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4882 if (fd >= 0)
4883 return fd;
4884#endif
4885 return inotify_init ();
2806} 4886}
2807 4887
2808inline_size void 4888inline_size void
2809infy_init (EV_P) 4889infy_init (EV_P)
2810{ 4890{
2811 if (fs_fd != -2) 4891 if (fs_fd != -2)
2812 return; 4892 return;
2813 4893
2814 fs_fd = -1; 4894 fs_fd = -1;
2815 4895
2816 check_2625 (EV_A); 4896 ev_check_2625 (EV_A);
2817 4897
2818 fs_fd = inotify_init (); 4898 fs_fd = infy_newfd ();
2819 4899
2820 if (fs_fd >= 0) 4900 if (fs_fd >= 0)
2821 { 4901 {
4902 fd_intern (fs_fd);
2822 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4903 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2823 ev_set_priority (&fs_w, EV_MAXPRI); 4904 ev_set_priority (&fs_w, EV_MAXPRI);
2824 ev_io_start (EV_A_ &fs_w); 4905 ev_io_start (EV_A_ &fs_w);
4906 ev_unref (EV_A);
2825 } 4907 }
2826} 4908}
2827 4909
2828inline_size void 4910inline_size void
2829infy_fork (EV_P) 4911infy_fork (EV_P)
… …
2831 int slot; 4913 int slot;
2832 4914
2833 if (fs_fd < 0) 4915 if (fs_fd < 0)
2834 return; 4916 return;
2835 4917
4918 ev_ref (EV_A);
4919 ev_io_stop (EV_A_ &fs_w);
2836 close (fs_fd); 4920 close (fs_fd);
2837 fs_fd = inotify_init (); 4921 fs_fd = infy_newfd ();
2838 4922
4923 if (fs_fd >= 0)
4924 {
4925 fd_intern (fs_fd);
4926 ev_io_set (&fs_w, fs_fd, EV_READ);
4927 ev_io_start (EV_A_ &fs_w);
4928 ev_unref (EV_A);
4929 }
4930
2839 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4931 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2840 { 4932 {
2841 WL w_ = fs_hash [slot].head; 4933 WL w_ = fs_hash [slot].head;
2842 fs_hash [slot].head = 0; 4934 fs_hash [slot].head = 0;
2843 4935
2844 while (w_) 4936 while (w_)
… …
2849 w->wd = -1; 4941 w->wd = -1;
2850 4942
2851 if (fs_fd >= 0) 4943 if (fs_fd >= 0)
2852 infy_add (EV_A_ w); /* re-add, no matter what */ 4944 infy_add (EV_A_ w); /* re-add, no matter what */
2853 else 4945 else
4946 {
4947 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4948 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2854 ev_timer_again (EV_A_ &w->timer); 4949 ev_timer_again (EV_A_ &w->timer);
4950 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4951 }
2855 } 4952 }
2856 } 4953 }
2857} 4954}
2858 4955
2859#endif 4956#endif
… …
2863#else 4960#else
2864# define EV_LSTAT(p,b) lstat (p, b) 4961# define EV_LSTAT(p,b) lstat (p, b)
2865#endif 4962#endif
2866 4963
2867void 4964void
2868ev_stat_stat (EV_P_ ev_stat *w) 4965ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
2869{ 4966{
2870 if (lstat (w->path, &w->attr) < 0) 4967 if (lstat (w->path, &w->attr) < 0)
2871 w->attr.st_nlink = 0; 4968 w->attr.st_nlink = 0;
2872 else if (!w->attr.st_nlink) 4969 else if (!w->attr.st_nlink)
2873 w->attr.st_nlink = 1; 4970 w->attr.st_nlink = 1;
2874} 4971}
2875 4972
2876static void noinline 4973ecb_noinline
4974static void
2877stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4975stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2878{ 4976{
2879 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4977 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2880 4978
2881 /* we copy this here each the time so that */ 4979 ev_statdata prev = w->attr;
2882 /* prev has the old value when the callback gets invoked */
2883 w->prev = w->attr;
2884 ev_stat_stat (EV_A_ w); 4980 ev_stat_stat (EV_A_ w);
2885 4981
2886 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4982 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2887 if ( 4983 if (
2888 w->prev.st_dev != w->attr.st_dev 4984 prev.st_dev != w->attr.st_dev
2889 || w->prev.st_ino != w->attr.st_ino 4985 || prev.st_ino != w->attr.st_ino
2890 || w->prev.st_mode != w->attr.st_mode 4986 || prev.st_mode != w->attr.st_mode
2891 || w->prev.st_nlink != w->attr.st_nlink 4987 || prev.st_nlink != w->attr.st_nlink
2892 || w->prev.st_uid != w->attr.st_uid 4988 || prev.st_uid != w->attr.st_uid
2893 || w->prev.st_gid != w->attr.st_gid 4989 || prev.st_gid != w->attr.st_gid
2894 || w->prev.st_rdev != w->attr.st_rdev 4990 || prev.st_rdev != w->attr.st_rdev
2895 || w->prev.st_size != w->attr.st_size 4991 || prev.st_size != w->attr.st_size
2896 || w->prev.st_atime != w->attr.st_atime 4992 || prev.st_atime != w->attr.st_atime
2897 || w->prev.st_mtime != w->attr.st_mtime 4993 || prev.st_mtime != w->attr.st_mtime
2898 || w->prev.st_ctime != w->attr.st_ctime 4994 || prev.st_ctime != w->attr.st_ctime
2899 ) { 4995 ) {
4996 /* we only update w->prev on actual differences */
4997 /* in case we test more often than invoke the callback, */
4998 /* to ensure that prev is always different to attr */
4999 w->prev = prev;
5000
2900 #if EV_USE_INOTIFY 5001 #if EV_USE_INOTIFY
2901 if (fs_fd >= 0) 5002 if (fs_fd >= 0)
2902 { 5003 {
2903 infy_del (EV_A_ w); 5004 infy_del (EV_A_ w);
2904 infy_add (EV_A_ w); 5005 infy_add (EV_A_ w);
… …
2909 ev_feed_event (EV_A_ w, EV_STAT); 5010 ev_feed_event (EV_A_ w, EV_STAT);
2910 } 5011 }
2911} 5012}
2912 5013
2913void 5014void
2914ev_stat_start (EV_P_ ev_stat *w) 5015ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
2915{ 5016{
2916 if (expect_false (ev_is_active (w))) 5017 if (ecb_expect_false (ev_is_active (w)))
2917 return; 5018 return;
2918 5019
2919 ev_stat_stat (EV_A_ w); 5020 ev_stat_stat (EV_A_ w);
2920 5021
2921 if (w->interval < MIN_STAT_INTERVAL && w->interval) 5022 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
2929 5030
2930 if (fs_fd >= 0) 5031 if (fs_fd >= 0)
2931 infy_add (EV_A_ w); 5032 infy_add (EV_A_ w);
2932 else 5033 else
2933#endif 5034#endif
5035 {
2934 ev_timer_again (EV_A_ &w->timer); 5036 ev_timer_again (EV_A_ &w->timer);
5037 ev_unref (EV_A);
5038 }
2935 5039
2936 ev_start (EV_A_ (W)w, 1); 5040 ev_start (EV_A_ (W)w, 1);
2937 5041
2938 EV_FREQUENT_CHECK; 5042 EV_FREQUENT_CHECK;
2939} 5043}
2940 5044
2941void 5045void
2942ev_stat_stop (EV_P_ ev_stat *w) 5046ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
2943{ 5047{
2944 clear_pending (EV_A_ (W)w); 5048 clear_pending (EV_A_ (W)w);
2945 if (expect_false (!ev_is_active (w))) 5049 if (ecb_expect_false (!ev_is_active (w)))
2946 return; 5050 return;
2947 5051
2948 EV_FREQUENT_CHECK; 5052 EV_FREQUENT_CHECK;
2949 5053
2950#if EV_USE_INOTIFY 5054#if EV_USE_INOTIFY
2951 infy_del (EV_A_ w); 5055 infy_del (EV_A_ w);
2952#endif 5056#endif
5057
5058 if (ev_is_active (&w->timer))
5059 {
5060 ev_ref (EV_A);
2953 ev_timer_stop (EV_A_ &w->timer); 5061 ev_timer_stop (EV_A_ &w->timer);
5062 }
2954 5063
2955 ev_stop (EV_A_ (W)w); 5064 ev_stop (EV_A_ (W)w);
2956 5065
2957 EV_FREQUENT_CHECK; 5066 EV_FREQUENT_CHECK;
2958} 5067}
2959#endif 5068#endif
2960 5069
2961#if EV_IDLE_ENABLE 5070#if EV_IDLE_ENABLE
2962void 5071void
2963ev_idle_start (EV_P_ ev_idle *w) 5072ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
2964{ 5073{
2965 if (expect_false (ev_is_active (w))) 5074 if (ecb_expect_false (ev_is_active (w)))
2966 return; 5075 return;
2967 5076
2968 pri_adjust (EV_A_ (W)w); 5077 pri_adjust (EV_A_ (W)w);
2969 5078
2970 EV_FREQUENT_CHECK; 5079 EV_FREQUENT_CHECK;
… …
2973 int active = ++idlecnt [ABSPRI (w)]; 5082 int active = ++idlecnt [ABSPRI (w)];
2974 5083
2975 ++idleall; 5084 ++idleall;
2976 ev_start (EV_A_ (W)w, active); 5085 ev_start (EV_A_ (W)w, active);
2977 5086
2978 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 5087 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
2979 idles [ABSPRI (w)][active - 1] = w; 5088 idles [ABSPRI (w)][active - 1] = w;
2980 } 5089 }
2981 5090
2982 EV_FREQUENT_CHECK; 5091 EV_FREQUENT_CHECK;
2983} 5092}
2984 5093
2985void 5094void
2986ev_idle_stop (EV_P_ ev_idle *w) 5095ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
2987{ 5096{
2988 clear_pending (EV_A_ (W)w); 5097 clear_pending (EV_A_ (W)w);
2989 if (expect_false (!ev_is_active (w))) 5098 if (ecb_expect_false (!ev_is_active (w)))
2990 return; 5099 return;
2991 5100
2992 EV_FREQUENT_CHECK; 5101 EV_FREQUENT_CHECK;
2993 5102
2994 { 5103 {
… …
3003 5112
3004 EV_FREQUENT_CHECK; 5113 EV_FREQUENT_CHECK;
3005} 5114}
3006#endif 5115#endif
3007 5116
5117#if EV_PREPARE_ENABLE
3008void 5118void
3009ev_prepare_start (EV_P_ ev_prepare *w) 5119ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3010{ 5120{
3011 if (expect_false (ev_is_active (w))) 5121 if (ecb_expect_false (ev_is_active (w)))
3012 return; 5122 return;
3013 5123
3014 EV_FREQUENT_CHECK; 5124 EV_FREQUENT_CHECK;
3015 5125
3016 ev_start (EV_A_ (W)w, ++preparecnt); 5126 ev_start (EV_A_ (W)w, ++preparecnt);
3017 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 5127 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3018 prepares [preparecnt - 1] = w; 5128 prepares [preparecnt - 1] = w;
3019 5129
3020 EV_FREQUENT_CHECK; 5130 EV_FREQUENT_CHECK;
3021} 5131}
3022 5132
3023void 5133void
3024ev_prepare_stop (EV_P_ ev_prepare *w) 5134ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3025{ 5135{
3026 clear_pending (EV_A_ (W)w); 5136 clear_pending (EV_A_ (W)w);
3027 if (expect_false (!ev_is_active (w))) 5137 if (ecb_expect_false (!ev_is_active (w)))
3028 return; 5138 return;
3029 5139
3030 EV_FREQUENT_CHECK; 5140 EV_FREQUENT_CHECK;
3031 5141
3032 { 5142 {
… …
3038 5148
3039 ev_stop (EV_A_ (W)w); 5149 ev_stop (EV_A_ (W)w);
3040 5150
3041 EV_FREQUENT_CHECK; 5151 EV_FREQUENT_CHECK;
3042} 5152}
5153#endif
3043 5154
5155#if EV_CHECK_ENABLE
3044void 5156void
3045ev_check_start (EV_P_ ev_check *w) 5157ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3046{ 5158{
3047 if (expect_false (ev_is_active (w))) 5159 if (ecb_expect_false (ev_is_active (w)))
3048 return; 5160 return;
3049 5161
3050 EV_FREQUENT_CHECK; 5162 EV_FREQUENT_CHECK;
3051 5163
3052 ev_start (EV_A_ (W)w, ++checkcnt); 5164 ev_start (EV_A_ (W)w, ++checkcnt);
3053 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 5165 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3054 checks [checkcnt - 1] = w; 5166 checks [checkcnt - 1] = w;
3055 5167
3056 EV_FREQUENT_CHECK; 5168 EV_FREQUENT_CHECK;
3057} 5169}
3058 5170
3059void 5171void
3060ev_check_stop (EV_P_ ev_check *w) 5172ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3061{ 5173{
3062 clear_pending (EV_A_ (W)w); 5174 clear_pending (EV_A_ (W)w);
3063 if (expect_false (!ev_is_active (w))) 5175 if (ecb_expect_false (!ev_is_active (w)))
3064 return; 5176 return;
3065 5177
3066 EV_FREQUENT_CHECK; 5178 EV_FREQUENT_CHECK;
3067 5179
3068 { 5180 {
… …
3074 5186
3075 ev_stop (EV_A_ (W)w); 5187 ev_stop (EV_A_ (W)w);
3076 5188
3077 EV_FREQUENT_CHECK; 5189 EV_FREQUENT_CHECK;
3078} 5190}
5191#endif
3079 5192
3080#if EV_EMBED_ENABLE 5193#if EV_EMBED_ENABLE
3081void noinline 5194ecb_noinline
5195void
3082ev_embed_sweep (EV_P_ ev_embed *w) 5196ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3083{ 5197{
3084 ev_loop (w->other, EVLOOP_NONBLOCK); 5198 ev_run (w->other, EVRUN_NOWAIT);
3085} 5199}
3086 5200
3087static void 5201static void
3088embed_io_cb (EV_P_ ev_io *io, int revents) 5202embed_io_cb (EV_P_ ev_io *io, int revents)
3089{ 5203{
3090 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 5204 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3091 5205
3092 if (ev_cb (w)) 5206 if (ev_cb (w))
3093 ev_feed_event (EV_A_ (W)w, EV_EMBED); 5207 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3094 else 5208 else
3095 ev_loop (w->other, EVLOOP_NONBLOCK); 5209 ev_run (w->other, EVRUN_NOWAIT);
3096} 5210}
3097 5211
3098static void 5212static void
3099embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 5213embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3100{ 5214{
3101 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 5215 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3102 5216
3103 { 5217 {
3104 struct ev_loop *loop = w->other; 5218 EV_P = w->other;
3105 5219
3106 while (fdchangecnt) 5220 while (fdchangecnt)
3107 { 5221 {
3108 fd_reify (EV_A); 5222 fd_reify (EV_A);
3109 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5223 ev_run (EV_A_ EVRUN_NOWAIT);
3110 } 5224 }
3111 } 5225 }
3112} 5226}
3113 5227
5228#if EV_FORK_ENABLE
3114static void 5229static void
3115embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5230embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3116{ 5231{
3117 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 5232 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3118 5233
3119 ev_embed_stop (EV_A_ w); 5234 ev_embed_stop (EV_A_ w);
3120 5235
3121 { 5236 {
3122 struct ev_loop *loop = w->other; 5237 EV_P = w->other;
3123 5238
3124 ev_loop_fork (EV_A); 5239 ev_loop_fork (EV_A);
3125 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5240 ev_run (EV_A_ EVRUN_NOWAIT);
3126 } 5241 }
3127 5242
3128 ev_embed_start (EV_A_ w); 5243 ev_embed_start (EV_A_ w);
3129} 5244}
5245#endif
3130 5246
3131#if 0 5247#if 0
3132static void 5248static void
3133embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5249embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3134{ 5250{
3135 ev_idle_stop (EV_A_ idle); 5251 ev_idle_stop (EV_A_ idle);
3136} 5252}
3137#endif 5253#endif
3138 5254
3139void 5255void
3140ev_embed_start (EV_P_ ev_embed *w) 5256ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3141{ 5257{
3142 if (expect_false (ev_is_active (w))) 5258 if (ecb_expect_false (ev_is_active (w)))
3143 return; 5259 return;
3144 5260
3145 { 5261 {
3146 struct ev_loop *loop = w->other; 5262 EV_P = w->other;
3147 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 5263 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3148 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 5264 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3149 } 5265 }
3150 5266
3151 EV_FREQUENT_CHECK; 5267 EV_FREQUENT_CHECK;
… …
3155 5271
3156 ev_prepare_init (&w->prepare, embed_prepare_cb); 5272 ev_prepare_init (&w->prepare, embed_prepare_cb);
3157 ev_set_priority (&w->prepare, EV_MINPRI); 5273 ev_set_priority (&w->prepare, EV_MINPRI);
3158 ev_prepare_start (EV_A_ &w->prepare); 5274 ev_prepare_start (EV_A_ &w->prepare);
3159 5275
5276#if EV_FORK_ENABLE
3160 ev_fork_init (&w->fork, embed_fork_cb); 5277 ev_fork_init (&w->fork, embed_fork_cb);
3161 ev_fork_start (EV_A_ &w->fork); 5278 ev_fork_start (EV_A_ &w->fork);
5279#endif
3162 5280
3163 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5281 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3164 5282
3165 ev_start (EV_A_ (W)w, 1); 5283 ev_start (EV_A_ (W)w, 1);
3166 5284
3167 EV_FREQUENT_CHECK; 5285 EV_FREQUENT_CHECK;
3168} 5286}
3169 5287
3170void 5288void
3171ev_embed_stop (EV_P_ ev_embed *w) 5289ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3172{ 5290{
3173 clear_pending (EV_A_ (W)w); 5291 clear_pending (EV_A_ (W)w);
3174 if (expect_false (!ev_is_active (w))) 5292 if (ecb_expect_false (!ev_is_active (w)))
3175 return; 5293 return;
3176 5294
3177 EV_FREQUENT_CHECK; 5295 EV_FREQUENT_CHECK;
3178 5296
3179 ev_io_stop (EV_A_ &w->io); 5297 ev_io_stop (EV_A_ &w->io);
3180 ev_prepare_stop (EV_A_ &w->prepare); 5298 ev_prepare_stop (EV_A_ &w->prepare);
5299#if EV_FORK_ENABLE
3181 ev_fork_stop (EV_A_ &w->fork); 5300 ev_fork_stop (EV_A_ &w->fork);
5301#endif
5302
5303 ev_stop (EV_A_ (W)w);
3182 5304
3183 EV_FREQUENT_CHECK; 5305 EV_FREQUENT_CHECK;
3184} 5306}
3185#endif 5307#endif
3186 5308
3187#if EV_FORK_ENABLE 5309#if EV_FORK_ENABLE
3188void 5310void
3189ev_fork_start (EV_P_ ev_fork *w) 5311ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3190{ 5312{
3191 if (expect_false (ev_is_active (w))) 5313 if (ecb_expect_false (ev_is_active (w)))
3192 return; 5314 return;
3193 5315
3194 EV_FREQUENT_CHECK; 5316 EV_FREQUENT_CHECK;
3195 5317
3196 ev_start (EV_A_ (W)w, ++forkcnt); 5318 ev_start (EV_A_ (W)w, ++forkcnt);
3197 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5319 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3198 forks [forkcnt - 1] = w; 5320 forks [forkcnt - 1] = w;
3199 5321
3200 EV_FREQUENT_CHECK; 5322 EV_FREQUENT_CHECK;
3201} 5323}
3202 5324
3203void 5325void
3204ev_fork_stop (EV_P_ ev_fork *w) 5326ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3205{ 5327{
3206 clear_pending (EV_A_ (W)w); 5328 clear_pending (EV_A_ (W)w);
3207 if (expect_false (!ev_is_active (w))) 5329 if (ecb_expect_false (!ev_is_active (w)))
3208 return; 5330 return;
3209 5331
3210 EV_FREQUENT_CHECK; 5332 EV_FREQUENT_CHECK;
3211 5333
3212 { 5334 {
… …
3220 5342
3221 EV_FREQUENT_CHECK; 5343 EV_FREQUENT_CHECK;
3222} 5344}
3223#endif 5345#endif
3224 5346
5347#if EV_CLEANUP_ENABLE
5348void
5349ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5350{
5351 if (ecb_expect_false (ev_is_active (w)))
5352 return;
5353
5354 EV_FREQUENT_CHECK;
5355
5356 ev_start (EV_A_ (W)w, ++cleanupcnt);
5357 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5358 cleanups [cleanupcnt - 1] = w;
5359
5360 /* cleanup watchers should never keep a refcount on the loop */
5361 ev_unref (EV_A);
5362 EV_FREQUENT_CHECK;
5363}
5364
5365void
5366ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5367{
5368 clear_pending (EV_A_ (W)w);
5369 if (ecb_expect_false (!ev_is_active (w)))
5370 return;
5371
5372 EV_FREQUENT_CHECK;
5373 ev_ref (EV_A);
5374
5375 {
5376 int active = ev_active (w);
5377
5378 cleanups [active - 1] = cleanups [--cleanupcnt];
5379 ev_active (cleanups [active - 1]) = active;
5380 }
5381
5382 ev_stop (EV_A_ (W)w);
5383
5384 EV_FREQUENT_CHECK;
5385}
5386#endif
5387
3225#if EV_ASYNC_ENABLE 5388#if EV_ASYNC_ENABLE
3226void 5389void
3227ev_async_start (EV_P_ ev_async *w) 5390ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3228{ 5391{
3229 if (expect_false (ev_is_active (w))) 5392 if (ecb_expect_false (ev_is_active (w)))
3230 return; 5393 return;
3231 5394
5395 w->sent = 0;
5396
3232 evpipe_init (EV_A); 5397 evpipe_init (EV_A);
3233 5398
3234 EV_FREQUENT_CHECK; 5399 EV_FREQUENT_CHECK;
3235 5400
3236 ev_start (EV_A_ (W)w, ++asynccnt); 5401 ev_start (EV_A_ (W)w, ++asynccnt);
3237 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5402 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3238 asyncs [asynccnt - 1] = w; 5403 asyncs [asynccnt - 1] = w;
3239 5404
3240 EV_FREQUENT_CHECK; 5405 EV_FREQUENT_CHECK;
3241} 5406}
3242 5407
3243void 5408void
3244ev_async_stop (EV_P_ ev_async *w) 5409ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3245{ 5410{
3246 clear_pending (EV_A_ (W)w); 5411 clear_pending (EV_A_ (W)w);
3247 if (expect_false (!ev_is_active (w))) 5412 if (ecb_expect_false (!ev_is_active (w)))
3248 return; 5413 return;
3249 5414
3250 EV_FREQUENT_CHECK; 5415 EV_FREQUENT_CHECK;
3251 5416
3252 { 5417 {
… …
3260 5425
3261 EV_FREQUENT_CHECK; 5426 EV_FREQUENT_CHECK;
3262} 5427}
3263 5428
3264void 5429void
3265ev_async_send (EV_P_ ev_async *w) 5430ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3266{ 5431{
3267 w->sent = 1; 5432 w->sent = 1;
3268 evpipe_write (EV_A_ &gotasync); 5433 evpipe_write (EV_A_ &async_pending);
3269} 5434}
3270#endif 5435#endif
3271 5436
3272/*****************************************************************************/ 5437/*****************************************************************************/
3273 5438
… …
3307 5472
3308 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5473 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3309} 5474}
3310 5475
3311void 5476void
3312ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5477ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3313{ 5478{
3314 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5479 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3315
3316 if (expect_false (!once))
3317 {
3318 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3319 return;
3320 }
3321 5480
3322 once->cb = cb; 5481 once->cb = cb;
3323 once->arg = arg; 5482 once->arg = arg;
3324 5483
3325 ev_init (&once->io, once_cb_io); 5484 ev_init (&once->io, once_cb_io);
… …
3338} 5497}
3339 5498
3340/*****************************************************************************/ 5499/*****************************************************************************/
3341 5500
3342#if EV_WALK_ENABLE 5501#if EV_WALK_ENABLE
5502ecb_cold
3343void 5503void
3344ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5504ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3345{ 5505{
3346 int i, j; 5506 int i, j;
3347 ev_watcher_list *wl, *wn; 5507 ev_watcher_list *wl, *wn;
3348 5508
3349 if (types & (EV_IO | EV_EMBED)) 5509 if (types & (EV_IO | EV_EMBED))
… …
3392 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5552 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3393#endif 5553#endif
3394 5554
3395#if EV_IDLE_ENABLE 5555#if EV_IDLE_ENABLE
3396 if (types & EV_IDLE) 5556 if (types & EV_IDLE)
3397 for (j = NUMPRI; i--; ) 5557 for (j = NUMPRI; j--; )
3398 for (i = idlecnt [j]; i--; ) 5558 for (i = idlecnt [j]; i--; )
3399 cb (EV_A_ EV_IDLE, idles [j][i]); 5559 cb (EV_A_ EV_IDLE, idles [j][i]);
3400#endif 5560#endif
3401 5561
3402#if EV_FORK_ENABLE 5562#if EV_FORK_ENABLE
… …
3410 if (types & EV_ASYNC) 5570 if (types & EV_ASYNC)
3411 for (i = asynccnt; i--; ) 5571 for (i = asynccnt; i--; )
3412 cb (EV_A_ EV_ASYNC, asyncs [i]); 5572 cb (EV_A_ EV_ASYNC, asyncs [i]);
3413#endif 5573#endif
3414 5574
5575#if EV_PREPARE_ENABLE
3415 if (types & EV_PREPARE) 5576 if (types & EV_PREPARE)
3416 for (i = preparecnt; i--; ) 5577 for (i = preparecnt; i--; )
3417#if EV_EMBED_ENABLE 5578# if EV_EMBED_ENABLE
3418 if (ev_cb (prepares [i]) != embed_prepare_cb) 5579 if (ev_cb (prepares [i]) != embed_prepare_cb)
3419#endif 5580# endif
3420 cb (EV_A_ EV_PREPARE, prepares [i]); 5581 cb (EV_A_ EV_PREPARE, prepares [i]);
5582#endif
3421 5583
5584#if EV_CHECK_ENABLE
3422 if (types & EV_CHECK) 5585 if (types & EV_CHECK)
3423 for (i = checkcnt; i--; ) 5586 for (i = checkcnt; i--; )
3424 cb (EV_A_ EV_CHECK, checks [i]); 5587 cb (EV_A_ EV_CHECK, checks [i]);
5588#endif
3425 5589
5590#if EV_SIGNAL_ENABLE
3426 if (types & EV_SIGNAL) 5591 if (types & EV_SIGNAL)
3427 for (i = 0; i < signalmax; ++i) 5592 for (i = 0; i < EV_NSIG - 1; ++i)
3428 for (wl = signals [i].head; wl; ) 5593 for (wl = signals [i].head; wl; )
3429 { 5594 {
3430 wn = wl->next; 5595 wn = wl->next;
3431 cb (EV_A_ EV_SIGNAL, wl); 5596 cb (EV_A_ EV_SIGNAL, wl);
3432 wl = wn; 5597 wl = wn;
3433 } 5598 }
5599#endif
3434 5600
5601#if EV_CHILD_ENABLE
3435 if (types & EV_CHILD) 5602 if (types & EV_CHILD)
3436 for (i = EV_PID_HASHSIZE; i--; ) 5603 for (i = (EV_PID_HASHSIZE); i--; )
3437 for (wl = childs [i]; wl; ) 5604 for (wl = childs [i]; wl; )
3438 { 5605 {
3439 wn = wl->next; 5606 wn = wl->next;
3440 cb (EV_A_ EV_CHILD, wl); 5607 cb (EV_A_ EV_CHILD, wl);
3441 wl = wn; 5608 wl = wn;
3442 } 5609 }
5610#endif
3443/* EV_STAT 0x00001000 /* stat data changed */ 5611/* EV_STAT 0x00001000 /* stat data changed */
3444/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 5612/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3445} 5613}
3446#endif 5614#endif
3447 5615
3448#if EV_MULTIPLICITY 5616#if EV_MULTIPLICITY
3449 #include "ev_wrap.h" 5617 #include "ev_wrap.h"
3450#endif 5618#endif
3451 5619
3452#ifdef __cplusplus
3453}
3454#endif
3455

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