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Comparing libev/ev.c (file contents):
Revision 1.322 by root, Thu Jan 7 06:49:31 2010 UTC vs.
Revision 1.520 by root, Sat Dec 28 07:44:15 2019 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_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
146# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif 136# endif
153 137
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
154#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
155 155
156#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
157#include <stdlib.h> 204#include <stdlib.h>
158#include <string.h> 205#include <string.h>
159#include <fcntl.h> 206#include <fcntl.h>
160#include <stddef.h> 207#include <stddef.h>
161 208
… …
163 210
164#include <assert.h> 211#include <assert.h>
165#include <errno.h> 212#include <errno.h>
166#include <sys/types.h> 213#include <sys/types.h>
167#include <time.h> 214#include <time.h>
215#include <limits.h>
168 216
169#include <signal.h> 217#include <signal.h>
170 218
171#ifdef EV_H 219#ifdef EV_H
172# include EV_H 220# include EV_H
173#else 221#else
174# 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
175#endif 234#endif
176 235
177#ifndef _WIN32 236#ifndef _WIN32
178# include <sys/time.h> 237# include <sys/time.h>
179# include <sys/wait.h> 238# include <sys/wait.h>
180# include <unistd.h> 239# include <unistd.h>
181#else 240#else
182# include <io.h> 241# include <io.h>
183# define WIN32_LEAN_AND_MEAN 242# define WIN32_LEAN_AND_MEAN
243# include <winsock2.h>
184# include <windows.h> 244# include <windows.h>
185# ifndef EV_SELECT_IS_WINSOCKET 245# ifndef EV_SELECT_IS_WINSOCKET
186# define EV_SELECT_IS_WINSOCKET 1 246# define EV_SELECT_IS_WINSOCKET 1
187# endif 247# endif
248# undef EV_AVOID_STDIO
188#endif 249#endif
189 250
190/* 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 */
191 252
192/* try to deduce the maximum number of signals on this platform */ 253/* try to deduce the maximum number of signals on this platform */
193#if defined (EV_NSIG) 254#if defined EV_NSIG
194/* use what's provided */ 255/* use what's provided */
195#elif defined (NSIG) 256#elif defined NSIG
196# define EV_NSIG (NSIG) 257# define EV_NSIG (NSIG)
197#elif defined(_NSIG) 258#elif defined _NSIG
198# define EV_NSIG (_NSIG) 259# define EV_NSIG (_NSIG)
199#elif defined (SIGMAX) 260#elif defined SIGMAX
200# define EV_NSIG (SIGMAX+1) 261# define EV_NSIG (SIGMAX+1)
201#elif defined (SIG_MAX) 262#elif defined SIG_MAX
202# define EV_NSIG (SIG_MAX+1) 263# define EV_NSIG (SIG_MAX+1)
203#elif defined (_SIG_MAX) 264#elif defined _SIG_MAX
204# define EV_NSIG (_SIG_MAX+1) 265# define EV_NSIG (_SIG_MAX+1)
205#elif defined (MAXSIG) 266#elif defined MAXSIG
206# define EV_NSIG (MAXSIG+1) 267# define EV_NSIG (MAXSIG+1)
207#elif defined (MAX_SIG) 268#elif defined MAX_SIG
208# define EV_NSIG (MAX_SIG+1) 269# define EV_NSIG (MAX_SIG+1)
209#elif defined (SIGARRAYSIZE) 270#elif defined SIGARRAYSIZE
210# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */ 271# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
211#elif defined (_sys_nsig) 272#elif defined _sys_nsig
212# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 273# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
213#else 274#else
214# error "unable to find value for NSIG, please report" 275# define EV_NSIG (8 * sizeof (sigset_t) + 1)
215/* to make it compile regardless, just remove the above line */ 276#endif
216# define EV_NSIG 65 277
278#ifndef EV_USE_FLOOR
279# define EV_USE_FLOOR 0
217#endif 280#endif
218 281
219#ifndef EV_USE_CLOCK_SYSCALL 282#ifndef EV_USE_CLOCK_SYSCALL
220# if __linux && __GLIBC__ >= 2 283# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
221# define EV_USE_CLOCK_SYSCALL 1 284# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
222# else 285# else
223# define EV_USE_CLOCK_SYSCALL 0 286# define EV_USE_CLOCK_SYSCALL 0
224# endif 287# endif
225#endif 288#endif
226 289
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
227#ifndef EV_USE_MONOTONIC 299#ifndef EV_USE_MONOTONIC
228# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 300# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
229# define EV_USE_MONOTONIC 1 301# define EV_USE_MONOTONIC EV_FEATURE_OS
230# else 302# else
231# define EV_USE_MONOTONIC 0 303# define EV_USE_MONOTONIC 0
232# endif 304# endif
233#endif 305#endif
234 306
… …
236# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 308# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
237#endif 309#endif
238 310
239#ifndef EV_USE_NANOSLEEP 311#ifndef EV_USE_NANOSLEEP
240# if _POSIX_C_SOURCE >= 199309L 312# if _POSIX_C_SOURCE >= 199309L
241# define EV_USE_NANOSLEEP 1 313# define EV_USE_NANOSLEEP EV_FEATURE_OS
242# else 314# else
243# define EV_USE_NANOSLEEP 0 315# define EV_USE_NANOSLEEP 0
244# endif 316# endif
245#endif 317#endif
246 318
247#ifndef EV_USE_SELECT 319#ifndef EV_USE_SELECT
248# define EV_USE_SELECT 1 320# define EV_USE_SELECT EV_FEATURE_BACKENDS
249#endif 321#endif
250 322
251#ifndef EV_USE_POLL 323#ifndef EV_USE_POLL
252# ifdef _WIN32 324# ifdef _WIN32
253# define EV_USE_POLL 0 325# define EV_USE_POLL 0
254# else 326# else
255# define EV_USE_POLL 1 327# define EV_USE_POLL EV_FEATURE_BACKENDS
256# endif 328# endif
257#endif 329#endif
258 330
259#ifndef EV_USE_EPOLL 331#ifndef EV_USE_EPOLL
260# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 332# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
261# define EV_USE_EPOLL 1 333# define EV_USE_EPOLL EV_FEATURE_BACKENDS
262# else 334# else
263# define EV_USE_EPOLL 0 335# define EV_USE_EPOLL 0
264# endif 336# endif
265#endif 337#endif
266 338
… …
270 342
271#ifndef EV_USE_PORT 343#ifndef EV_USE_PORT
272# define EV_USE_PORT 0 344# define EV_USE_PORT 0
273#endif 345#endif
274 346
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
275#ifndef EV_USE_INOTIFY 363#ifndef EV_USE_INOTIFY
276# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 364# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
277# define EV_USE_INOTIFY 1 365# define EV_USE_INOTIFY EV_FEATURE_OS
278# else 366# else
279# define EV_USE_INOTIFY 0 367# define EV_USE_INOTIFY 0
280# endif 368# endif
281#endif 369#endif
282 370
283#ifndef EV_PID_HASHSIZE 371#ifndef EV_PID_HASHSIZE
284# if EV_MINIMAL 372# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
285# define EV_PID_HASHSIZE 1
286# else
287# define EV_PID_HASHSIZE 16
288# endif
289#endif 373#endif
290 374
291#ifndef EV_INOTIFY_HASHSIZE 375#ifndef EV_INOTIFY_HASHSIZE
292# if EV_MINIMAL 376# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
293# define EV_INOTIFY_HASHSIZE 1
294# else
295# define EV_INOTIFY_HASHSIZE 16
296# endif
297#endif 377#endif
298 378
299#ifndef EV_USE_EVENTFD 379#ifndef EV_USE_EVENTFD
300# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 380# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
301# define EV_USE_EVENTFD 1 381# define EV_USE_EVENTFD EV_FEATURE_OS
302# else 382# else
303# define EV_USE_EVENTFD 0 383# define EV_USE_EVENTFD 0
304# endif 384# endif
305#endif 385#endif
306 386
307#ifndef EV_USE_SIGNALFD 387#ifndef EV_USE_SIGNALFD
308# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 388# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
309# define EV_USE_SIGNALFD 1 389# define EV_USE_SIGNALFD EV_FEATURE_OS
310# else 390# else
311# define EV_USE_SIGNALFD 0 391# 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
312# endif 400# endif
313#endif 401#endif
314 402
315#if 0 /* debugging */ 403#if 0 /* debugging */
316# define EV_VERIFY 3 404# define EV_VERIFY 3
317# define EV_USE_4HEAP 1 405# define EV_USE_4HEAP 1
318# define EV_HEAP_CACHE_AT 1 406# define EV_HEAP_CACHE_AT 1
319#endif 407#endif
320 408
321#ifndef EV_VERIFY 409#ifndef EV_VERIFY
322# define EV_VERIFY !EV_MINIMAL 410# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
323#endif 411#endif
324 412
325#ifndef EV_USE_4HEAP 413#ifndef EV_USE_4HEAP
326# define EV_USE_4HEAP !EV_MINIMAL 414# define EV_USE_4HEAP EV_FEATURE_DATA
327#endif 415#endif
328 416
329#ifndef EV_HEAP_CACHE_AT 417#ifndef EV_HEAP_CACHE_AT
330# 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
331#endif 435#endif
332 436
333/* 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, */
334/* which makes programs even slower. might work on other unices, too. */ 438/* which makes programs even slower. might work on other unices, too. */
335#if EV_USE_CLOCK_SYSCALL 439#if EV_USE_CLOCK_SYSCALL
336# include <syscall.h> 440# include <sys/syscall.h>
337# ifdef SYS_clock_gettime 441# ifdef SYS_clock_gettime
338# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 442# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
339# undef EV_USE_MONOTONIC 443# undef EV_USE_MONOTONIC
340# define EV_USE_MONOTONIC 1 444# define EV_USE_MONOTONIC 1
445# define EV_NEED_SYSCALL 1
341# else 446# else
342# undef EV_USE_CLOCK_SYSCALL 447# undef EV_USE_CLOCK_SYSCALL
343# define EV_USE_CLOCK_SYSCALL 0 448# define EV_USE_CLOCK_SYSCALL 0
344# endif 449# endif
345#endif 450#endif
… …
359#if !EV_STAT_ENABLE 464#if !EV_STAT_ENABLE
360# undef EV_USE_INOTIFY 465# undef EV_USE_INOTIFY
361# define EV_USE_INOTIFY 0 466# define EV_USE_INOTIFY 0
362#endif 467#endif
363 468
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
364#if !EV_USE_NANOSLEEP 477#if !EV_USE_NANOSLEEP
365# ifndef _WIN32 478/* hp-ux has it in sys/time.h, which we unconditionally include above */
479# if !defined _WIN32 && !defined __hpux
366# include <sys/select.h> 480# include <sys/select.h>
367# endif 481# endif
368#endif 482#endif
369 483
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
370#if EV_USE_INOTIFY 509#if EV_USE_INOTIFY
371# include <sys/utsname.h>
372# include <sys/statfs.h> 510# include <sys/statfs.h>
373# include <sys/inotify.h> 511# include <sys/inotify.h>
374/* 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 */
375# ifndef IN_DONT_FOLLOW 513# ifndef IN_DONT_FOLLOW
376# undef EV_USE_INOTIFY 514# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 515# define EV_USE_INOTIFY 0
378# endif 516# endif
379#endif 517#endif
380 518
381#if EV_SELECT_IS_WINSOCKET
382# include <winsock.h>
383#endif
384
385#if EV_USE_EVENTFD 519#if EV_USE_EVENTFD
386/* 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 */
387# include <stdint.h> 521# include <stdint.h>
388# ifndef EFD_NONBLOCK 522# ifndef EFD_NONBLOCK
389# define EFD_NONBLOCK O_NONBLOCK 523# define EFD_NONBLOCK O_NONBLOCK
390# endif 524# endif
391# ifndef EFD_CLOEXEC 525# ifndef EFD_CLOEXEC
… …
393# define EFD_CLOEXEC O_CLOEXEC 527# define EFD_CLOEXEC O_CLOEXEC
394# else 528# else
395# define EFD_CLOEXEC 02000000 529# define EFD_CLOEXEC 02000000
396# endif 530# endif
397# endif 531# endif
398# ifdef __cplusplus
399extern "C" {
400# endif
401int eventfd (unsigned int initval, int flags); 532EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
402# ifdef __cplusplus
403}
404# endif
405#endif 533#endif
406 534
407#if EV_USE_SIGNALFD 535#if EV_USE_SIGNALFD
408/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 536/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
409# include <stdint.h> 537# include <stdint.h>
410# ifndef SFD_NONBLOCK 538# ifndef SFD_NONBLOCK
411# define SFD_NONBLOCK O_NONBLOCK 539# define SFD_NONBLOCK O_NONBLOCK
412# endif 540# endif
413# ifndef SFD_CLOEXEC 541# ifndef SFD_CLOEXEC
… …
415# define SFD_CLOEXEC O_CLOEXEC 543# define SFD_CLOEXEC O_CLOEXEC
416# else 544# else
417# define SFD_CLOEXEC 02000000 545# define SFD_CLOEXEC 02000000
418# endif 546# endif
419# endif 547# endif
420# ifdef __cplusplus
421extern "C" {
422# endif
423int signalfd (int fd, const sigset_t *mask, int flags); 548EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags);
424 549
425struct signalfd_siginfo 550struct signalfd_siginfo
426{ 551{
427 uint32_t ssi_signo; 552 uint32_t ssi_signo;
428 char pad[128 - sizeof (uint32_t)]; 553 char pad[128 - sizeof (uint32_t)];
429}; 554};
430# ifdef __cplusplus 555#endif
431} 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
432# endif 564# endif
433#endif 565#endif
434 566
435 567/*****************************************************************************/
436/**/
437 568
438#if EV_VERIFY >= 3 569#if EV_VERIFY >= 3
439# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 570# define EV_FREQUENT_CHECK ev_verify (EV_A)
440#else 571#else
441# define EV_FREQUENT_CHECK do { } while (0) 572# define EV_FREQUENT_CHECK do { } while (0)
442#endif 573#endif
443 574
444/* 575/*
445 * This is used to avoid floating point rounding problems. 576 * This is used to work around floating point rounding problems.
446 * It is added to ev_rt_now when scheduling periodics
447 * to ensure progress, time-wise, even when rounding
448 * errors are against us.
449 * This value is good at least till the year 4000. 577 * This value is good at least till the year 4000.
450 * Better solutions welcome.
451 */ 578 */
452#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 */
453 581
454#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) */
455#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) */
456 584
585/* find a portable timestamp that is "always" in the future but fits into time_t.
586 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
587 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
588#define EV_TSTAMP_HUGE \
589 (sizeof (time_t) >= 8 ? 10000000000000. \
590 : 0 < (time_t)4294967295 ? 4294967295. \
591 : 2147483647.) \
592
593#ifndef EV_TS_CONST
594# define EV_TS_CONST(nv) nv
595# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
596# define EV_TS_FROM_USEC(us) us * 1e-6
597# define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
598# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
599# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
600# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
601#endif
602
603/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
604/* ECB.H BEGIN */
605/*
606 * libecb - http://software.schmorp.de/pkg/libecb
607 *
608 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
609 * Copyright (©) 2011 Emanuele Giaquinta
610 * All rights reserved.
611 *
612 * Redistribution and use in source and binary forms, with or without modifica-
613 * tion, are permitted provided that the following conditions are met:
614 *
615 * 1. Redistributions of source code must retain the above copyright notice,
616 * this list of conditions and the following disclaimer.
617 *
618 * 2. Redistributions in binary form must reproduce the above copyright
619 * notice, this list of conditions and the following disclaimer in the
620 * documentation and/or other materials provided with the distribution.
621 *
622 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
623 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
624 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
625 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
626 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
627 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
628 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
629 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
630 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
631 * OF THE POSSIBILITY OF SUCH DAMAGE.
632 *
633 * Alternatively, the contents of this file may be used under the terms of
634 * the GNU General Public License ("GPL") version 2 or any later version,
635 * in which case the provisions of the GPL are applicable instead of
636 * the above. If you wish to allow the use of your version of this file
637 * only under the terms of the GPL and not to allow others to use your
638 * version of this file under the BSD license, indicate your decision
639 * by deleting the provisions above and replace them with the notice
640 * and other provisions required by the GPL. If you do not delete the
641 * provisions above, a recipient may use your version of this file under
642 * either the BSD or the GPL.
643 */
644
645#ifndef ECB_H
646#define ECB_H
647
648/* 16 bits major, 16 bits minor */
649#define ECB_VERSION 0x00010006
650
651#ifdef _WIN32
652 typedef signed char int8_t;
653 typedef unsigned char uint8_t;
654 typedef signed short int16_t;
655 typedef unsigned short uint16_t;
656 typedef signed int int32_t;
657 typedef unsigned int uint32_t;
457#if __GNUC__ >= 4 658 #if __GNUC__
458# define expect(expr,value) __builtin_expect ((expr),(value)) 659 typedef signed long long int64_t;
459# define noinline __attribute__ ((noinline)) 660 typedef unsigned long long uint64_t;
661 #else /* _MSC_VER || __BORLANDC__ */
662 typedef signed __int64 int64_t;
663 typedef unsigned __int64 uint64_t;
664 #endif
665 #ifdef _WIN64
666 #define ECB_PTRSIZE 8
667 typedef uint64_t uintptr_t;
668 typedef int64_t intptr_t;
669 #else
670 #define ECB_PTRSIZE 4
671 typedef uint32_t uintptr_t;
672 typedef int32_t intptr_t;
673 #endif
460#else 674#else
461# define expect(expr,value) (expr) 675 #include <inttypes.h>
462# define noinline 676 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
463# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 677 #define ECB_PTRSIZE 8
464# define inline 678 #else
679 #define ECB_PTRSIZE 4
680 #endif
465# endif 681#endif
682
683#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
684#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
685
686/* work around x32 idiocy by defining proper macros */
687#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
688 #if _ILP32
689 #define ECB_AMD64_X32 1
690 #else
691 #define ECB_AMD64 1
466#endif 692 #endif
693#endif
467 694
468#define expect_false(expr) expect ((expr) != 0, 0) 695/* many compilers define _GNUC_ to some versions but then only implement
469#define expect_true(expr) expect ((expr) != 0, 1) 696 * what their idiot authors think are the "more important" extensions,
470#define inline_size static inline 697 * causing enormous grief in return for some better fake benchmark numbers.
471 698 * or so.
472#if EV_MINIMAL 699 * we try to detect these and simply assume they are not gcc - if they have
473# define inline_speed static noinline 700 * an issue with that they should have done it right in the first place.
701 */
702#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
703 #define ECB_GCC_VERSION(major,minor) 0
474#else 704#else
705 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
706#endif
707
708#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
709
710#if __clang__ && defined __has_builtin
711 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
712#else
713 #define ECB_CLANG_BUILTIN(x) 0
714#endif
715
716#if __clang__ && defined __has_extension
717 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
718#else
719 #define ECB_CLANG_EXTENSION(x) 0
720#endif
721
722#define ECB_CPP (__cplusplus+0)
723#define ECB_CPP11 (__cplusplus >= 201103L)
724#define ECB_CPP14 (__cplusplus >= 201402L)
725#define ECB_CPP17 (__cplusplus >= 201703L)
726
727#if ECB_CPP
728 #define ECB_C 0
729 #define ECB_STDC_VERSION 0
730#else
731 #define ECB_C 1
732 #define ECB_STDC_VERSION __STDC_VERSION__
733#endif
734
735#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
736#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
737#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
738
739#if ECB_CPP
740 #define ECB_EXTERN_C extern "C"
741 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
742 #define ECB_EXTERN_C_END }
743#else
744 #define ECB_EXTERN_C extern
745 #define ECB_EXTERN_C_BEG
746 #define ECB_EXTERN_C_END
747#endif
748
749/*****************************************************************************/
750
751/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
752/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
753
754#if ECB_NO_THREADS
755 #define ECB_NO_SMP 1
756#endif
757
758#if ECB_NO_SMP
759 #define ECB_MEMORY_FENCE do { } while (0)
760#endif
761
762/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
763#if __xlC__ && ECB_CPP
764 #include <builtins.h>
765#endif
766
767#if 1400 <= _MSC_VER
768 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
769#endif
770
771#ifndef ECB_MEMORY_FENCE
772 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
773 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
774 #if __i386 || __i386__
775 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
776 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
777 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
778 #elif ECB_GCC_AMD64
779 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
780 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
781 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
782 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
783 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
784 #elif defined __ARM_ARCH_2__ \
785 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
786 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
787 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
788 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
789 || defined __ARM_ARCH_5TEJ__
790 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
791 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
792 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
793 || defined __ARM_ARCH_6T2__
794 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
795 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
796 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
797 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
798 #elif __aarch64__
799 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
800 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
801 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
802 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
803 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
804 #elif defined __s390__ || defined __s390x__
805 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
806 #elif defined __mips__
807 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
808 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
809 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
810 #elif defined __alpha__
811 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
812 #elif defined __hppa__
813 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
814 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
815 #elif defined __ia64__
816 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
817 #elif defined __m68k__
818 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
819 #elif defined __m88k__
820 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
821 #elif defined __sh__
822 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
823 #endif
824 #endif
825#endif
826
827#ifndef ECB_MEMORY_FENCE
828 #if ECB_GCC_VERSION(4,7)
829 /* see comment below (stdatomic.h) about the C11 memory model. */
830 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
831 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
832 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
833 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
834
835 #elif ECB_CLANG_EXTENSION(c_atomic)
836 /* see comment below (stdatomic.h) about the C11 memory model. */
837 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
838 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
839 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
840 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
841
842 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
843 #define ECB_MEMORY_FENCE __sync_synchronize ()
844 #elif _MSC_VER >= 1500 /* VC++ 2008 */
845 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
846 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
847 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
848 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
849 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
850 #elif _MSC_VER >= 1400 /* VC++ 2005 */
851 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
852 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
853 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
854 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
855 #elif defined _WIN32
856 #include <WinNT.h>
857 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
858 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
859 #include <mbarrier.h>
860 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
861 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
862 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
863 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
864 #elif __xlC__
865 #define ECB_MEMORY_FENCE __sync ()
866 #endif
867#endif
868
869#ifndef ECB_MEMORY_FENCE
870 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
871 /* we assume that these memory fences work on all variables/all memory accesses, */
872 /* not just C11 atomics and atomic accesses */
873 #include <stdatomic.h>
874 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
875 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
876 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
877 #endif
878#endif
879
880#ifndef ECB_MEMORY_FENCE
881 #if !ECB_AVOID_PTHREADS
882 /*
883 * if you get undefined symbol references to pthread_mutex_lock,
884 * or failure to find pthread.h, then you should implement
885 * the ECB_MEMORY_FENCE operations for your cpu/compiler
886 * OR provide pthread.h and link against the posix thread library
887 * of your system.
888 */
889 #include <pthread.h>
890 #define ECB_NEEDS_PTHREADS 1
891 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
892
893 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
894 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
895 #endif
896#endif
897
898#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
899 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
900#endif
901
902#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
903 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
904#endif
905
906#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
907 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
908#endif
909
910/*****************************************************************************/
911
912#if ECB_CPP
913 #define ecb_inline static inline
914#elif ECB_GCC_VERSION(2,5)
915 #define ecb_inline static __inline__
916#elif ECB_C99
917 #define ecb_inline static inline
918#else
919 #define ecb_inline static
920#endif
921
922#if ECB_GCC_VERSION(3,3)
923 #define ecb_restrict __restrict__
924#elif ECB_C99
925 #define ecb_restrict restrict
926#else
927 #define ecb_restrict
928#endif
929
930typedef int ecb_bool;
931
932#define ECB_CONCAT_(a, b) a ## b
933#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
934#define ECB_STRINGIFY_(a) # a
935#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
936#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
937
938#define ecb_function_ ecb_inline
939
940#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
941 #define ecb_attribute(attrlist) __attribute__ (attrlist)
942#else
943 #define ecb_attribute(attrlist)
944#endif
945
946#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
947 #define ecb_is_constant(expr) __builtin_constant_p (expr)
948#else
949 /* possible C11 impl for integral types
950 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
951 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
952
953 #define ecb_is_constant(expr) 0
954#endif
955
956#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
957 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
958#else
959 #define ecb_expect(expr,value) (expr)
960#endif
961
962#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
963 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
964#else
965 #define ecb_prefetch(addr,rw,locality)
966#endif
967
968/* no emulation for ecb_decltype */
969#if ECB_CPP11
970 // older implementations might have problems with decltype(x)::type, work around it
971 template<class T> struct ecb_decltype_t { typedef T type; };
972 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
973#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
974 #define ecb_decltype(x) __typeof__ (x)
975#endif
976
977#if _MSC_VER >= 1300
978 #define ecb_deprecated __declspec (deprecated)
979#else
980 #define ecb_deprecated ecb_attribute ((__deprecated__))
981#endif
982
983#if _MSC_VER >= 1500
984 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
985#elif ECB_GCC_VERSION(4,5)
986 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
987#else
988 #define ecb_deprecated_message(msg) ecb_deprecated
989#endif
990
991#if _MSC_VER >= 1400
992 #define ecb_noinline __declspec (noinline)
993#else
994 #define ecb_noinline ecb_attribute ((__noinline__))
995#endif
996
997#define ecb_unused ecb_attribute ((__unused__))
998#define ecb_const ecb_attribute ((__const__))
999#define ecb_pure ecb_attribute ((__pure__))
1000
1001#if ECB_C11 || __IBMC_NORETURN
1002 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
1003 #define ecb_noreturn _Noreturn
1004#elif ECB_CPP11
1005 #define ecb_noreturn [[noreturn]]
1006#elif _MSC_VER >= 1200
1007 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
1008 #define ecb_noreturn __declspec (noreturn)
1009#else
1010 #define ecb_noreturn ecb_attribute ((__noreturn__))
1011#endif
1012
1013#if ECB_GCC_VERSION(4,3)
1014 #define ecb_artificial ecb_attribute ((__artificial__))
1015 #define ecb_hot ecb_attribute ((__hot__))
1016 #define ecb_cold ecb_attribute ((__cold__))
1017#else
1018 #define ecb_artificial
1019 #define ecb_hot
1020 #define ecb_cold
1021#endif
1022
1023/* put around conditional expressions if you are very sure that the */
1024/* expression is mostly true or mostly false. note that these return */
1025/* booleans, not the expression. */
1026#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
1027#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
1028/* for compatibility to the rest of the world */
1029#define ecb_likely(expr) ecb_expect_true (expr)
1030#define ecb_unlikely(expr) ecb_expect_false (expr)
1031
1032/* count trailing zero bits and count # of one bits */
1033#if ECB_GCC_VERSION(3,4) \
1034 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1035 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1036 && ECB_CLANG_BUILTIN(__builtin_popcount))
1037 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1038 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1039 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1040 #define ecb_ctz32(x) __builtin_ctz (x)
1041 #define ecb_ctz64(x) __builtin_ctzll (x)
1042 #define ecb_popcount32(x) __builtin_popcount (x)
1043 /* no popcountll */
1044#else
1045 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1046 ecb_function_ ecb_const int
1047 ecb_ctz32 (uint32_t x)
1048 {
1049#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1050 unsigned long r;
1051 _BitScanForward (&r, x);
1052 return (int)r;
1053#else
1054 int r = 0;
1055
1056 x &= ~x + 1; /* this isolates the lowest bit */
1057
1058#if ECB_branchless_on_i386
1059 r += !!(x & 0xaaaaaaaa) << 0;
1060 r += !!(x & 0xcccccccc) << 1;
1061 r += !!(x & 0xf0f0f0f0) << 2;
1062 r += !!(x & 0xff00ff00) << 3;
1063 r += !!(x & 0xffff0000) << 4;
1064#else
1065 if (x & 0xaaaaaaaa) r += 1;
1066 if (x & 0xcccccccc) r += 2;
1067 if (x & 0xf0f0f0f0) r += 4;
1068 if (x & 0xff00ff00) r += 8;
1069 if (x & 0xffff0000) r += 16;
1070#endif
1071
1072 return r;
1073#endif
1074 }
1075
1076 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1077 ecb_function_ ecb_const int
1078 ecb_ctz64 (uint64_t x)
1079 {
1080#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1081 unsigned long r;
1082 _BitScanForward64 (&r, x);
1083 return (int)r;
1084#else
1085 int shift = x & 0xffffffff ? 0 : 32;
1086 return ecb_ctz32 (x >> shift) + shift;
1087#endif
1088 }
1089
1090 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1091 ecb_function_ ecb_const int
1092 ecb_popcount32 (uint32_t x)
1093 {
1094 x -= (x >> 1) & 0x55555555;
1095 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1096 x = ((x >> 4) + x) & 0x0f0f0f0f;
1097 x *= 0x01010101;
1098
1099 return x >> 24;
1100 }
1101
1102 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1103 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1104 {
1105#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1106 unsigned long r;
1107 _BitScanReverse (&r, x);
1108 return (int)r;
1109#else
1110 int r = 0;
1111
1112 if (x >> 16) { x >>= 16; r += 16; }
1113 if (x >> 8) { x >>= 8; r += 8; }
1114 if (x >> 4) { x >>= 4; r += 4; }
1115 if (x >> 2) { x >>= 2; r += 2; }
1116 if (x >> 1) { r += 1; }
1117
1118 return r;
1119#endif
1120 }
1121
1122 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1123 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1124 {
1125#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1126 unsigned long r;
1127 _BitScanReverse64 (&r, x);
1128 return (int)r;
1129#else
1130 int r = 0;
1131
1132 if (x >> 32) { x >>= 32; r += 32; }
1133
1134 return r + ecb_ld32 (x);
1135#endif
1136 }
1137#endif
1138
1139ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1140ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1141ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1142ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1143
1144ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1145ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1146{
1147 return ( (x * 0x0802U & 0x22110U)
1148 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1149}
1150
1151ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1152ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1153{
1154 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1155 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1156 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1157 x = ( x >> 8 ) | ( x << 8);
1158
1159 return x;
1160}
1161
1162ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1163ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1164{
1165 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1166 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1167 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1168 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1169 x = ( x >> 16 ) | ( x << 16);
1170
1171 return x;
1172}
1173
1174/* popcount64 is only available on 64 bit cpus as gcc builtin */
1175/* so for this version we are lazy */
1176ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1177ecb_function_ ecb_const int
1178ecb_popcount64 (uint64_t x)
1179{
1180 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1181}
1182
1183ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1184ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1185ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1186ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1187ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1188ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1189ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1190ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1191
1192ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1193ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1194ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1195ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1196ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1197ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1198ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1199ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1200
1201#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1202 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1203 #define ecb_bswap16(x) __builtin_bswap16 (x)
1204 #else
1205 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1206 #endif
1207 #define ecb_bswap32(x) __builtin_bswap32 (x)
1208 #define ecb_bswap64(x) __builtin_bswap64 (x)
1209#elif _MSC_VER
1210 #include <stdlib.h>
1211 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1212 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1213 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1214#else
1215 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1216 ecb_function_ ecb_const uint16_t
1217 ecb_bswap16 (uint16_t x)
1218 {
1219 return ecb_rotl16 (x, 8);
1220 }
1221
1222 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1223 ecb_function_ ecb_const uint32_t
1224 ecb_bswap32 (uint32_t x)
1225 {
1226 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1227 }
1228
1229 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1230 ecb_function_ ecb_const uint64_t
1231 ecb_bswap64 (uint64_t x)
1232 {
1233 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1234 }
1235#endif
1236
1237#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1238 #define ecb_unreachable() __builtin_unreachable ()
1239#else
1240 /* this seems to work fine, but gcc always emits a warning for it :/ */
1241 ecb_inline ecb_noreturn void ecb_unreachable (void);
1242 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1243#endif
1244
1245/* try to tell the compiler that some condition is definitely true */
1246#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1247
1248ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1249ecb_inline ecb_const uint32_t
1250ecb_byteorder_helper (void)
1251{
1252 /* the union code still generates code under pressure in gcc, */
1253 /* but less than using pointers, and always seems to */
1254 /* successfully return a constant. */
1255 /* the reason why we have this horrible preprocessor mess */
1256 /* is to avoid it in all cases, at least on common architectures */
1257 /* or when using a recent enough gcc version (>= 4.6) */
1258#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1259 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1260 #define ECB_LITTLE_ENDIAN 1
1261 return 0x44332211;
1262#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1263 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1264 #define ECB_BIG_ENDIAN 1
1265 return 0x11223344;
1266#else
1267 union
1268 {
1269 uint8_t c[4];
1270 uint32_t u;
1271 } u = { 0x11, 0x22, 0x33, 0x44 };
1272 return u.u;
1273#endif
1274}
1275
1276ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1277ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1278ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1279ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1280
1281#if ECB_GCC_VERSION(3,0) || ECB_C99
1282 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1283#else
1284 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1285#endif
1286
1287#if ECB_CPP
1288 template<typename T>
1289 static inline T ecb_div_rd (T val, T div)
1290 {
1291 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1292 }
1293 template<typename T>
1294 static inline T ecb_div_ru (T val, T div)
1295 {
1296 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1297 }
1298#else
1299 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1300 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1301#endif
1302
1303#if ecb_cplusplus_does_not_suck
1304 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1305 template<typename T, int N>
1306 static inline int ecb_array_length (const T (&arr)[N])
1307 {
1308 return N;
1309 }
1310#else
1311 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1312#endif
1313
1314ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1315ecb_function_ ecb_const uint32_t
1316ecb_binary16_to_binary32 (uint32_t x)
1317{
1318 unsigned int s = (x & 0x8000) << (31 - 15);
1319 int e = (x >> 10) & 0x001f;
1320 unsigned int m = x & 0x03ff;
1321
1322 if (ecb_expect_false (e == 31))
1323 /* infinity or NaN */
1324 e = 255 - (127 - 15);
1325 else if (ecb_expect_false (!e))
1326 {
1327 if (ecb_expect_true (!m))
1328 /* zero, handled by code below by forcing e to 0 */
1329 e = 0 - (127 - 15);
1330 else
1331 {
1332 /* subnormal, renormalise */
1333 unsigned int s = 10 - ecb_ld32 (m);
1334
1335 m = (m << s) & 0x3ff; /* mask implicit bit */
1336 e -= s - 1;
1337 }
1338 }
1339
1340 /* e and m now are normalised, or zero, (or inf or nan) */
1341 e += 127 - 15;
1342
1343 return s | (e << 23) | (m << (23 - 10));
1344}
1345
1346ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1347ecb_function_ ecb_const uint16_t
1348ecb_binary32_to_binary16 (uint32_t x)
1349{
1350 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1351 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1352 unsigned int m = x & 0x007fffff;
1353
1354 x &= 0x7fffffff;
1355
1356 /* if it's within range of binary16 normals, use fast path */
1357 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1358 {
1359 /* mantissa round-to-even */
1360 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1361
1362 /* handle overflow */
1363 if (ecb_expect_false (m >= 0x00800000))
1364 {
1365 m >>= 1;
1366 e += 1;
1367 }
1368
1369 return s | (e << 10) | (m >> (23 - 10));
1370 }
1371
1372 /* handle large numbers and infinity */
1373 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1374 return s | 0x7c00;
1375
1376 /* handle zero, subnormals and small numbers */
1377 if (ecb_expect_true (x < 0x38800000))
1378 {
1379 /* zero */
1380 if (ecb_expect_true (!x))
1381 return s;
1382
1383 /* handle subnormals */
1384
1385 /* too small, will be zero */
1386 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1387 return s;
1388
1389 m |= 0x00800000; /* make implicit bit explicit */
1390
1391 /* very tricky - we need to round to the nearest e (+10) bit value */
1392 {
1393 unsigned int bits = 14 - e;
1394 unsigned int half = (1 << (bits - 1)) - 1;
1395 unsigned int even = (m >> bits) & 1;
1396
1397 /* if this overflows, we will end up with a normalised number */
1398 m = (m + half + even) >> bits;
1399 }
1400
1401 return s | m;
1402 }
1403
1404 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1405 m >>= 13;
1406
1407 return s | 0x7c00 | m | !m;
1408}
1409
1410/*******************************************************************************/
1411/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1412
1413/* basically, everything uses "ieee pure-endian" floating point numbers */
1414/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1415#if 0 \
1416 || __i386 || __i386__ \
1417 || ECB_GCC_AMD64 \
1418 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1419 || defined __s390__ || defined __s390x__ \
1420 || defined __mips__ \
1421 || defined __alpha__ \
1422 || defined __hppa__ \
1423 || defined __ia64__ \
1424 || defined __m68k__ \
1425 || defined __m88k__ \
1426 || defined __sh__ \
1427 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1428 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1429 || defined __aarch64__
1430 #define ECB_STDFP 1
1431 #include <string.h> /* for memcpy */
1432#else
1433 #define ECB_STDFP 0
1434#endif
1435
1436#ifndef ECB_NO_LIBM
1437
1438 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1439
1440 /* only the oldest of old doesn't have this one. solaris. */
1441 #ifdef INFINITY
1442 #define ECB_INFINITY INFINITY
1443 #else
1444 #define ECB_INFINITY HUGE_VAL
1445 #endif
1446
1447 #ifdef NAN
1448 #define ECB_NAN NAN
1449 #else
1450 #define ECB_NAN ECB_INFINITY
1451 #endif
1452
1453 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1454 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1455 #define ecb_frexpf(x,e) frexpf ((x), (e))
1456 #else
1457 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1458 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1459 #endif
1460
1461 /* convert a float to ieee single/binary32 */
1462 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1463 ecb_function_ ecb_const uint32_t
1464 ecb_float_to_binary32 (float x)
1465 {
1466 uint32_t r;
1467
1468 #if ECB_STDFP
1469 memcpy (&r, &x, 4);
1470 #else
1471 /* slow emulation, works for anything but -0 */
1472 uint32_t m;
1473 int e;
1474
1475 if (x == 0e0f ) return 0x00000000U;
1476 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1477 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1478 if (x != x ) return 0x7fbfffffU;
1479
1480 m = ecb_frexpf (x, &e) * 0x1000000U;
1481
1482 r = m & 0x80000000U;
1483
1484 if (r)
1485 m = -m;
1486
1487 if (e <= -126)
1488 {
1489 m &= 0xffffffU;
1490 m >>= (-125 - e);
1491 e = -126;
1492 }
1493
1494 r |= (e + 126) << 23;
1495 r |= m & 0x7fffffU;
1496 #endif
1497
1498 return r;
1499 }
1500
1501 /* converts an ieee single/binary32 to a float */
1502 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1503 ecb_function_ ecb_const float
1504 ecb_binary32_to_float (uint32_t x)
1505 {
1506 float r;
1507
1508 #if ECB_STDFP
1509 memcpy (&r, &x, 4);
1510 #else
1511 /* emulation, only works for normals and subnormals and +0 */
1512 int neg = x >> 31;
1513 int e = (x >> 23) & 0xffU;
1514
1515 x &= 0x7fffffU;
1516
1517 if (e)
1518 x |= 0x800000U;
1519 else
1520 e = 1;
1521
1522 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1523 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1524
1525 r = neg ? -r : r;
1526 #endif
1527
1528 return r;
1529 }
1530
1531 /* convert a double to ieee double/binary64 */
1532 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1533 ecb_function_ ecb_const uint64_t
1534 ecb_double_to_binary64 (double x)
1535 {
1536 uint64_t r;
1537
1538 #if ECB_STDFP
1539 memcpy (&r, &x, 8);
1540 #else
1541 /* slow emulation, works for anything but -0 */
1542 uint64_t m;
1543 int e;
1544
1545 if (x == 0e0 ) return 0x0000000000000000U;
1546 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1547 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1548 if (x != x ) return 0X7ff7ffffffffffffU;
1549
1550 m = frexp (x, &e) * 0x20000000000000U;
1551
1552 r = m & 0x8000000000000000;;
1553
1554 if (r)
1555 m = -m;
1556
1557 if (e <= -1022)
1558 {
1559 m &= 0x1fffffffffffffU;
1560 m >>= (-1021 - e);
1561 e = -1022;
1562 }
1563
1564 r |= ((uint64_t)(e + 1022)) << 52;
1565 r |= m & 0xfffffffffffffU;
1566 #endif
1567
1568 return r;
1569 }
1570
1571 /* converts an ieee double/binary64 to a double */
1572 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1573 ecb_function_ ecb_const double
1574 ecb_binary64_to_double (uint64_t x)
1575 {
1576 double r;
1577
1578 #if ECB_STDFP
1579 memcpy (&r, &x, 8);
1580 #else
1581 /* emulation, only works for normals and subnormals and +0 */
1582 int neg = x >> 63;
1583 int e = (x >> 52) & 0x7ffU;
1584
1585 x &= 0xfffffffffffffU;
1586
1587 if (e)
1588 x |= 0x10000000000000U;
1589 else
1590 e = 1;
1591
1592 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1593 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1594
1595 r = neg ? -r : r;
1596 #endif
1597
1598 return r;
1599 }
1600
1601 /* convert a float to ieee half/binary16 */
1602 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1603 ecb_function_ ecb_const uint16_t
1604 ecb_float_to_binary16 (float x)
1605 {
1606 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1607 }
1608
1609 /* convert an ieee half/binary16 to float */
1610 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1611 ecb_function_ ecb_const float
1612 ecb_binary16_to_float (uint16_t x)
1613 {
1614 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1615 }
1616
1617#endif
1618
1619#endif
1620
1621/* ECB.H END */
1622
1623#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1624/* if your architecture doesn't need memory fences, e.g. because it is
1625 * single-cpu/core, or if you use libev in a project that doesn't use libev
1626 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1627 * libev, in which cases the memory fences become nops.
1628 * alternatively, you can remove this #error and link against libpthread,
1629 * which will then provide the memory fences.
1630 */
1631# error "memory fences not defined for your architecture, please report"
1632#endif
1633
1634#ifndef ECB_MEMORY_FENCE
1635# define ECB_MEMORY_FENCE do { } while (0)
1636# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1637# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1638#endif
1639
1640#define inline_size ecb_inline
1641
1642#if EV_FEATURE_CODE
475# define inline_speed static inline 1643# define inline_speed ecb_inline
1644#else
1645# define inline_speed ecb_noinline static
476#endif 1646#endif
1647
1648/*****************************************************************************/
1649/* raw syscall wrappers */
1650
1651#if EV_NEED_SYSCALL
1652
1653#include <sys/syscall.h>
1654
1655/*
1656 * define some syscall wrappers for common architectures
1657 * this is mostly for nice looks during debugging, not performance.
1658 * our syscalls return < 0, not == -1, on error. which is good
1659 * enough for linux aio.
1660 * TODO: arm is also common nowadays, maybe even mips and x86
1661 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1662 */
1663#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
1664 /* the costly errno access probably kills this for size optimisation */
1665
1666 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1667 ({ \
1668 long res; \
1669 register unsigned long r6 __asm__ ("r9" ); \
1670 register unsigned long r5 __asm__ ("r8" ); \
1671 register unsigned long r4 __asm__ ("r10"); \
1672 register unsigned long r3 __asm__ ("rdx"); \
1673 register unsigned long r2 __asm__ ("rsi"); \
1674 register unsigned long r1 __asm__ ("rdi"); \
1675 if (narg >= 6) r6 = (unsigned long)(arg6); \
1676 if (narg >= 5) r5 = (unsigned long)(arg5); \
1677 if (narg >= 4) r4 = (unsigned long)(arg4); \
1678 if (narg >= 3) r3 = (unsigned long)(arg3); \
1679 if (narg >= 2) r2 = (unsigned long)(arg2); \
1680 if (narg >= 1) r1 = (unsigned long)(arg1); \
1681 __asm__ __volatile__ ( \
1682 "syscall\n\t" \
1683 : "=a" (res) \
1684 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1685 : "cc", "r11", "cx", "memory"); \
1686 errno = -res; \
1687 res; \
1688 })
1689
1690#endif
1691
1692#ifdef ev_syscall
1693 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1694 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1695 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1696 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1697 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1698 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1699 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1700#else
1701 #define ev_syscall0(nr) syscall (nr)
1702 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1703 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1704 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1705 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1706 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1707 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1708#endif
1709
1710#endif
1711
1712/*****************************************************************************/
477 1713
478#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1714#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
479 1715
480#if EV_MINPRI == EV_MAXPRI 1716#if EV_MINPRI == EV_MAXPRI
481# define ABSPRI(w) (((W)w), 0) 1717# define ABSPRI(w) (((W)w), 0)
482#else 1718#else
483# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1719# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
484#endif 1720#endif
485 1721
486#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1722#define EMPTY /* required for microsofts broken pseudo-c compiler */
487#define EMPTY2(a,b) /* used to suppress some warnings */
488 1723
489typedef ev_watcher *W; 1724typedef ev_watcher *W;
490typedef ev_watcher_list *WL; 1725typedef ev_watcher_list *WL;
491typedef ev_watcher_time *WT; 1726typedef ev_watcher_time *WT;
492 1727
493#define ev_active(w) ((W)(w))->active 1728#define ev_active(w) ((W)(w))->active
494#define ev_at(w) ((WT)(w))->at 1729#define ev_at(w) ((WT)(w))->at
495 1730
496#if EV_USE_REALTIME 1731#if EV_USE_REALTIME
497/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 1732/* sig_atomic_t is used to avoid per-thread variables or locking but still */
498/* giving it a reasonably high chance of working on typical architetcures */ 1733/* giving it a reasonably high chance of working on typical architectures */
499static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1734static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
500#endif 1735#endif
501 1736
502#if EV_USE_MONOTONIC 1737#if EV_USE_MONOTONIC
503static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1738static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
517# include "ev_win32.c" 1752# include "ev_win32.c"
518#endif 1753#endif
519 1754
520/*****************************************************************************/ 1755/*****************************************************************************/
521 1756
1757#if EV_USE_LINUXAIO
1758# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1759#endif
1760
1761/* define a suitable floor function (only used by periodics atm) */
1762
1763#if EV_USE_FLOOR
1764# include <math.h>
1765# define ev_floor(v) floor (v)
1766#else
1767
1768#include <float.h>
1769
1770/* a floor() replacement function, should be independent of ev_tstamp type */
1771ecb_noinline
1772static ev_tstamp
1773ev_floor (ev_tstamp v)
1774{
1775 /* the choice of shift factor is not terribly important */
1776#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1777 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1778#else
1779 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1780#endif
1781
1782 /* special treatment for negative arguments */
1783 if (ecb_expect_false (v < 0.))
1784 {
1785 ev_tstamp f = -ev_floor (-v);
1786
1787 return f - (f == v ? 0 : 1);
1788 }
1789
1790 /* argument too large for an unsigned long? then reduce it */
1791 if (ecb_expect_false (v >= shift))
1792 {
1793 ev_tstamp f;
1794
1795 if (v == v - 1.)
1796 return v; /* very large numbers are assumed to be integer */
1797
1798 f = shift * ev_floor (v * (1. / shift));
1799 return f + ev_floor (v - f);
1800 }
1801
1802 /* fits into an unsigned long */
1803 return (unsigned long)v;
1804}
1805
1806#endif
1807
1808/*****************************************************************************/
1809
1810#ifdef __linux
1811# include <sys/utsname.h>
1812#endif
1813
1814ecb_noinline ecb_cold
1815static unsigned int
1816ev_linux_version (void)
1817{
1818#ifdef __linux
1819 unsigned int v = 0;
1820 struct utsname buf;
1821 int i;
1822 char *p = buf.release;
1823
1824 if (uname (&buf))
1825 return 0;
1826
1827 for (i = 3+1; --i; )
1828 {
1829 unsigned int c = 0;
1830
1831 for (;;)
1832 {
1833 if (*p >= '0' && *p <= '9')
1834 c = c * 10 + *p++ - '0';
1835 else
1836 {
1837 p += *p == '.';
1838 break;
1839 }
1840 }
1841
1842 v = (v << 8) | c;
1843 }
1844
1845 return v;
1846#else
1847 return 0;
1848#endif
1849}
1850
1851/*****************************************************************************/
1852
1853#if EV_AVOID_STDIO
1854ecb_noinline ecb_cold
1855static void
1856ev_printerr (const char *msg)
1857{
1858 write (STDERR_FILENO, msg, strlen (msg));
1859}
1860#endif
1861
522static void (*syserr_cb)(const char *msg); 1862static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
523 1863
1864ecb_cold
524void 1865void
525ev_set_syserr_cb (void (*cb)(const char *msg)) 1866ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
526{ 1867{
527 syserr_cb = cb; 1868 syserr_cb = cb;
528} 1869}
529 1870
530static void noinline 1871ecb_noinline ecb_cold
1872static void
531ev_syserr (const char *msg) 1873ev_syserr (const char *msg)
532{ 1874{
533 if (!msg) 1875 if (!msg)
534 msg = "(libev) system error"; 1876 msg = "(libev) system error";
535 1877
536 if (syserr_cb) 1878 if (syserr_cb)
537 syserr_cb (msg); 1879 syserr_cb (msg);
538 else 1880 else
539 { 1881 {
1882#if EV_AVOID_STDIO
1883 ev_printerr (msg);
1884 ev_printerr (": ");
1885 ev_printerr (strerror (errno));
1886 ev_printerr ("\n");
1887#else
540 perror (msg); 1888 perror (msg);
1889#endif
541 abort (); 1890 abort ();
542 } 1891 }
543} 1892}
544 1893
545static void * 1894static void *
546ev_realloc_emul (void *ptr, long size) 1895ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
547{ 1896{
548 /* some systems, notably openbsd and darwin, fail to properly 1897 /* some systems, notably openbsd and darwin, fail to properly
549 * implement realloc (x, 0) (as required by both ansi c-98 and 1898 * implement realloc (x, 0) (as required by both ansi c-89 and
550 * the single unix specification, so work around them here. 1899 * the single unix specification, so work around them here.
1900 * recently, also (at least) fedora and debian started breaking it,
1901 * despite documenting it otherwise.
551 */ 1902 */
552 1903
553 if (size) 1904 if (size)
554 return realloc (ptr, size); 1905 return realloc (ptr, size);
555 1906
556 free (ptr); 1907 free (ptr);
557 return 0; 1908 return 0;
558} 1909}
559 1910
560static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1911static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
561 1912
1913ecb_cold
562void 1914void
563ev_set_allocator (void *(*cb)(void *ptr, long size)) 1915ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
564{ 1916{
565 alloc = cb; 1917 alloc = cb;
566} 1918}
567 1919
568inline_speed void * 1920inline_speed void *
… …
570{ 1922{
571 ptr = alloc (ptr, size); 1923 ptr = alloc (ptr, size);
572 1924
573 if (!ptr && size) 1925 if (!ptr && size)
574 { 1926 {
1927#if EV_AVOID_STDIO
1928 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1929#else
575 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1930 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1931#endif
576 abort (); 1932 abort ();
577 } 1933 }
578 1934
579 return ptr; 1935 return ptr;
580} 1936}
… …
591typedef struct 1947typedef struct
592{ 1948{
593 WL head; 1949 WL head;
594 unsigned char events; /* the events watched for */ 1950 unsigned char events; /* the events watched for */
595 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1951 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
596 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1952 unsigned char emask; /* some backends store the actual kernel mask in here */
597 unsigned char unused; 1953 unsigned char eflags; /* flags field for use by backends */
598#if EV_USE_EPOLL 1954#if EV_USE_EPOLL
599 unsigned int egen; /* generation counter to counter epoll bugs */ 1955 unsigned int egen; /* generation counter to counter epoll bugs */
600#endif 1956#endif
601#if EV_SELECT_IS_WINSOCKET 1957#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
602 SOCKET handle; 1958 SOCKET handle;
1959#endif
1960#if EV_USE_IOCP
1961 OVERLAPPED or, ow;
603#endif 1962#endif
604} ANFD; 1963} ANFD;
605 1964
606/* stores the pending event set for a given watcher */ 1965/* stores the pending event set for a given watcher */
607typedef struct 1966typedef struct
… …
649 #undef VAR 2008 #undef VAR
650 }; 2009 };
651 #include "ev_wrap.h" 2010 #include "ev_wrap.h"
652 2011
653 static struct ev_loop default_loop_struct; 2012 static struct ev_loop default_loop_struct;
654 struct ev_loop *ev_default_loop_ptr; 2013 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
655 2014
656#else 2015#else
657 2016
658 ev_tstamp ev_rt_now; 2017 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
659 #define VAR(name,decl) static decl; 2018 #define VAR(name,decl) static decl;
660 #include "ev_vars.h" 2019 #include "ev_vars.h"
661 #undef VAR 2020 #undef VAR
662 2021
663 static int ev_default_loop_ptr; 2022 static int ev_default_loop_ptr;
664 2023
665#endif 2024#endif
666 2025
667#if EV_MINIMAL < 2 2026#if EV_FEATURE_API
668# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 2027# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
669# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 2028# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
670# define EV_INVOKE_PENDING invoke_cb (EV_A) 2029# define EV_INVOKE_PENDING invoke_cb (EV_A)
671#else 2030#else
672# define EV_RELEASE_CB (void)0 2031# define EV_RELEASE_CB (void)0
673# define EV_ACQUIRE_CB (void)0 2032# define EV_ACQUIRE_CB (void)0
674# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2033# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
675#endif 2034#endif
676 2035
677#define EVUNLOOP_RECURSE 0x80 2036#define EVBREAK_RECURSE 0x80
678 2037
679/*****************************************************************************/ 2038/*****************************************************************************/
680 2039
681#ifndef EV_HAVE_EV_TIME 2040#ifndef EV_HAVE_EV_TIME
682ev_tstamp 2041ev_tstamp
683ev_time (void) 2042ev_time (void) EV_NOEXCEPT
684{ 2043{
685#if EV_USE_REALTIME 2044#if EV_USE_REALTIME
686 if (expect_true (have_realtime)) 2045 if (ecb_expect_true (have_realtime))
687 { 2046 {
688 struct timespec ts; 2047 struct timespec ts;
689 clock_gettime (CLOCK_REALTIME, &ts); 2048 clock_gettime (CLOCK_REALTIME, &ts);
690 return ts.tv_sec + ts.tv_nsec * 1e-9; 2049 return EV_TS_GET (ts);
691 } 2050 }
692#endif 2051#endif
693 2052
2053 {
694 struct timeval tv; 2054 struct timeval tv;
695 gettimeofday (&tv, 0); 2055 gettimeofday (&tv, 0);
696 return tv.tv_sec + tv.tv_usec * 1e-6; 2056 return EV_TV_GET (tv);
2057 }
697} 2058}
698#endif 2059#endif
699 2060
700inline_size ev_tstamp 2061inline_size ev_tstamp
701get_clock (void) 2062get_clock (void)
702{ 2063{
703#if EV_USE_MONOTONIC 2064#if EV_USE_MONOTONIC
704 if (expect_true (have_monotonic)) 2065 if (ecb_expect_true (have_monotonic))
705 { 2066 {
706 struct timespec ts; 2067 struct timespec ts;
707 clock_gettime (CLOCK_MONOTONIC, &ts); 2068 clock_gettime (CLOCK_MONOTONIC, &ts);
708 return ts.tv_sec + ts.tv_nsec * 1e-9; 2069 return EV_TS_GET (ts);
709 } 2070 }
710#endif 2071#endif
711 2072
712 return ev_time (); 2073 return ev_time ();
713} 2074}
714 2075
715#if EV_MULTIPLICITY 2076#if EV_MULTIPLICITY
716ev_tstamp 2077ev_tstamp
717ev_now (EV_P) 2078ev_now (EV_P) EV_NOEXCEPT
718{ 2079{
719 return ev_rt_now; 2080 return ev_rt_now;
720} 2081}
721#endif 2082#endif
722 2083
723void 2084void
724ev_sleep (ev_tstamp delay) 2085ev_sleep (ev_tstamp delay) EV_NOEXCEPT
725{ 2086{
726 if (delay > 0.) 2087 if (delay > EV_TS_CONST (0.))
727 { 2088 {
728#if EV_USE_NANOSLEEP 2089#if EV_USE_NANOSLEEP
729 struct timespec ts; 2090 struct timespec ts;
730 2091
731 ts.tv_sec = (time_t)delay; 2092 EV_TS_SET (ts, delay);
732 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
733
734 nanosleep (&ts, 0); 2093 nanosleep (&ts, 0);
735#elif defined(_WIN32) 2094#elif defined _WIN32
2095 /* maybe this should round up, as ms is very low resolution */
2096 /* compared to select (µs) or nanosleep (ns) */
736 Sleep ((unsigned long)(delay * 1e3)); 2097 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
737#else 2098#else
738 struct timeval tv; 2099 struct timeval tv;
739
740 tv.tv_sec = (time_t)delay;
741 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
742 2100
743 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2101 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
744 /* something not guaranteed by newer posix versions, but guaranteed */ 2102 /* something not guaranteed by newer posix versions, but guaranteed */
745 /* by older ones */ 2103 /* by older ones */
2104 EV_TV_SET (tv, delay);
746 select (0, 0, 0, 0, &tv); 2105 select (0, 0, 0, 0, &tv);
747#endif 2106#endif
748 } 2107 }
749} 2108}
750 2109
751/*****************************************************************************/ 2110/*****************************************************************************/
752 2111
753#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 2112#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
754 2113
755/* find a suitable new size for the given array, */ 2114/* find a suitable new size for the given array, */
756/* hopefully by rounding to a ncie-to-malloc size */ 2115/* hopefully by rounding to a nice-to-malloc size */
757inline_size int 2116inline_size int
758array_nextsize (int elem, int cur, int cnt) 2117array_nextsize (int elem, int cur, int cnt)
759{ 2118{
760 int ncur = cur + 1; 2119 int ncur = cur + 1;
761 2120
762 do 2121 do
763 ncur <<= 1; 2122 ncur <<= 1;
764 while (cnt > ncur); 2123 while (cnt > ncur);
765 2124
766 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 2125 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
767 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2126 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
768 { 2127 {
769 ncur *= elem; 2128 ncur *= elem;
770 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 2129 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
771 ncur = ncur - sizeof (void *) * 4; 2130 ncur = ncur - sizeof (void *) * 4;
… …
773 } 2132 }
774 2133
775 return ncur; 2134 return ncur;
776} 2135}
777 2136
778static noinline void * 2137ecb_noinline ecb_cold
2138static void *
779array_realloc (int elem, void *base, int *cur, int cnt) 2139array_realloc (int elem, void *base, int *cur, int cnt)
780{ 2140{
781 *cur = array_nextsize (elem, *cur, cnt); 2141 *cur = array_nextsize (elem, *cur, cnt);
782 return ev_realloc (base, elem * *cur); 2142 return ev_realloc (base, elem * *cur);
783} 2143}
784 2144
2145#define array_needsize_noinit(base,offset,count)
2146
785#define array_init_zero(base,count) \ 2147#define array_needsize_zerofill(base,offset,count) \
786 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2148 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
787 2149
788#define array_needsize(type,base,cur,cnt,init) \ 2150#define array_needsize(type,base,cur,cnt,init) \
789 if (expect_false ((cnt) > (cur))) \ 2151 if (ecb_expect_false ((cnt) > (cur))) \
790 { \ 2152 { \
791 int ocur_ = (cur); \ 2153 ecb_unused int ocur_ = (cur); \
792 (base) = (type *)array_realloc \ 2154 (base) = (type *)array_realloc \
793 (sizeof (type), (base), &(cur), (cnt)); \ 2155 (sizeof (type), (base), &(cur), (cnt)); \
794 init ((base) + (ocur_), (cur) - ocur_); \ 2156 init ((base), ocur_, ((cur) - ocur_)); \
795 } 2157 }
796 2158
797#if 0 2159#if 0
798#define array_slim(type,stem) \ 2160#define array_slim(type,stem) \
799 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2161 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
808 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2170 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
809 2171
810/*****************************************************************************/ 2172/*****************************************************************************/
811 2173
812/* dummy callback for pending events */ 2174/* dummy callback for pending events */
813static void noinline 2175ecb_noinline
2176static void
814pendingcb (EV_P_ ev_prepare *w, int revents) 2177pendingcb (EV_P_ ev_prepare *w, int revents)
815{ 2178{
816} 2179}
817 2180
818void noinline 2181ecb_noinline
2182void
819ev_feed_event (EV_P_ void *w, int revents) 2183ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
820{ 2184{
821 W w_ = (W)w; 2185 W w_ = (W)w;
822 int pri = ABSPRI (w_); 2186 int pri = ABSPRI (w_);
823 2187
824 if (expect_false (w_->pending)) 2188 if (ecb_expect_false (w_->pending))
825 pendings [pri][w_->pending - 1].events |= revents; 2189 pendings [pri][w_->pending - 1].events |= revents;
826 else 2190 else
827 { 2191 {
828 w_->pending = ++pendingcnt [pri]; 2192 w_->pending = ++pendingcnt [pri];
829 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2193 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
830 pendings [pri][w_->pending - 1].w = w_; 2194 pendings [pri][w_->pending - 1].w = w_;
831 pendings [pri][w_->pending - 1].events = revents; 2195 pendings [pri][w_->pending - 1].events = revents;
832 } 2196 }
2197
2198 pendingpri = NUMPRI - 1;
833} 2199}
834 2200
835inline_speed void 2201inline_speed void
836feed_reverse (EV_P_ W w) 2202feed_reverse (EV_P_ W w)
837{ 2203{
838 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2204 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
839 rfeeds [rfeedcnt++] = w; 2205 rfeeds [rfeedcnt++] = w;
840} 2206}
841 2207
842inline_size void 2208inline_size void
843feed_reverse_done (EV_P_ int revents) 2209feed_reverse_done (EV_P_ int revents)
… …
857} 2223}
858 2224
859/*****************************************************************************/ 2225/*****************************************************************************/
860 2226
861inline_speed void 2227inline_speed void
862fd_event_nc (EV_P_ int fd, int revents) 2228fd_event_nocheck (EV_P_ int fd, int revents)
863{ 2229{
864 ANFD *anfd = anfds + fd; 2230 ANFD *anfd = anfds + fd;
865 ev_io *w; 2231 ev_io *w;
866 2232
867 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2233 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
878inline_speed void 2244inline_speed void
879fd_event (EV_P_ int fd, int revents) 2245fd_event (EV_P_ int fd, int revents)
880{ 2246{
881 ANFD *anfd = anfds + fd; 2247 ANFD *anfd = anfds + fd;
882 2248
883 if (expect_true (!anfd->reify)) 2249 if (ecb_expect_true (!anfd->reify))
884 fd_event_nc (EV_A_ fd, revents); 2250 fd_event_nocheck (EV_A_ fd, revents);
885} 2251}
886 2252
887void 2253void
888ev_feed_fd_event (EV_P_ int fd, int revents) 2254ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
889{ 2255{
890 if (fd >= 0 && fd < anfdmax) 2256 if (fd >= 0 && fd < anfdmax)
891 fd_event_nc (EV_A_ fd, revents); 2257 fd_event_nocheck (EV_A_ fd, revents);
892} 2258}
893 2259
894/* make sure the external fd watch events are in-sync */ 2260/* make sure the external fd watch events are in-sync */
895/* with the kernel/libev internal state */ 2261/* with the kernel/libev internal state */
896inline_size void 2262inline_size void
897fd_reify (EV_P) 2263fd_reify (EV_P)
898{ 2264{
899 int i; 2265 int i;
900 2266
2267 /* most backends do not modify the fdchanges list in backend_modfiy.
2268 * except io_uring, which has fixed-size buffers which might force us
2269 * to handle events in backend_modify, causing fdchangesd to be amended,
2270 * which could result in an endless loop.
2271 * to avoid this, we do not dynamically handle fds that were added
2272 * during fd_reify. that menas thast for those backends, fdchangecnt
2273 * might be non-zero during poll, which must cause them to not block.
2274 * to not put too much of a burden on other backends, this detail
2275 * needs to be handled in the backend.
2276 */
2277 int changecnt = fdchangecnt;
2278
2279#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
901 for (i = 0; i < fdchangecnt; ++i) 2280 for (i = 0; i < changecnt; ++i)
2281 {
2282 int fd = fdchanges [i];
2283 ANFD *anfd = anfds + fd;
2284
2285 if (anfd->reify & EV__IOFDSET && anfd->head)
2286 {
2287 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2288
2289 if (handle != anfd->handle)
2290 {
2291 unsigned long arg;
2292
2293 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2294
2295 /* handle changed, but fd didn't - we need to do it in two steps */
2296 backend_modify (EV_A_ fd, anfd->events, 0);
2297 anfd->events = 0;
2298 anfd->handle = handle;
2299 }
2300 }
2301 }
2302#endif
2303
2304 for (i = 0; i < changecnt; ++i)
902 { 2305 {
903 int fd = fdchanges [i]; 2306 int fd = fdchanges [i];
904 ANFD *anfd = anfds + fd; 2307 ANFD *anfd = anfds + fd;
905 ev_io *w; 2308 ev_io *w;
906 2309
907 unsigned char events = 0; 2310 unsigned char o_events = anfd->events;
2311 unsigned char o_reify = anfd->reify;
908 2312
909 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2313 anfd->reify = 0;
910 events |= (unsigned char)w->events;
911 2314
912#if EV_SELECT_IS_WINSOCKET 2315 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
913 if (events)
914 { 2316 {
915 unsigned long arg; 2317 anfd->events = 0;
916 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2318
917 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 2319 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
2320 anfd->events |= (unsigned char)w->events;
2321
2322 if (o_events != anfd->events)
2323 o_reify = EV__IOFDSET; /* actually |= */
918 } 2324 }
919#endif
920 2325
921 { 2326 if (o_reify & EV__IOFDSET)
922 unsigned char o_events = anfd->events;
923 unsigned char o_reify = anfd->reify;
924
925 anfd->reify = 0;
926 anfd->events = events;
927
928 if (o_events != events || o_reify & EV__IOFDSET)
929 backend_modify (EV_A_ fd, o_events, events); 2327 backend_modify (EV_A_ fd, o_events, anfd->events);
930 } 2328 }
931 }
932 2329
2330 /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added.
2331 * this is a rare case (see beginning comment in this function), so we copy them to the
2332 * front and hope the backend handles this case.
2333 */
2334 if (ecb_expect_false (fdchangecnt != changecnt))
2335 memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges));
2336
933 fdchangecnt = 0; 2337 fdchangecnt -= changecnt;
934} 2338}
935 2339
936/* something about the given fd changed */ 2340/* something about the given fd changed */
937inline_size void 2341inline_size
2342void
938fd_change (EV_P_ int fd, int flags) 2343fd_change (EV_P_ int fd, int flags)
939{ 2344{
940 unsigned char reify = anfds [fd].reify; 2345 unsigned char reify = anfds [fd].reify;
941 anfds [fd].reify |= flags; 2346 anfds [fd].reify |= flags;
942 2347
943 if (expect_true (!reify)) 2348 if (ecb_expect_true (!reify))
944 { 2349 {
945 ++fdchangecnt; 2350 ++fdchangecnt;
946 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2351 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
947 fdchanges [fdchangecnt - 1] = fd; 2352 fdchanges [fdchangecnt - 1] = fd;
948 } 2353 }
949} 2354}
950 2355
951/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2356/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
952inline_speed void 2357inline_speed ecb_cold void
953fd_kill (EV_P_ int fd) 2358fd_kill (EV_P_ int fd)
954{ 2359{
955 ev_io *w; 2360 ev_io *w;
956 2361
957 while ((w = (ev_io *)anfds [fd].head)) 2362 while ((w = (ev_io *)anfds [fd].head))
… …
959 ev_io_stop (EV_A_ w); 2364 ev_io_stop (EV_A_ w);
960 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2365 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
961 } 2366 }
962} 2367}
963 2368
964/* check whether the given fd is atcually valid, for error recovery */ 2369/* check whether the given fd is actually valid, for error recovery */
965inline_size int 2370inline_size ecb_cold int
966fd_valid (int fd) 2371fd_valid (int fd)
967{ 2372{
968#ifdef _WIN32 2373#ifdef _WIN32
969 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2374 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
970#else 2375#else
971 return fcntl (fd, F_GETFD) != -1; 2376 return fcntl (fd, F_GETFD) != -1;
972#endif 2377#endif
973} 2378}
974 2379
975/* called on EBADF to verify fds */ 2380/* called on EBADF to verify fds */
976static void noinline 2381ecb_noinline ecb_cold
2382static void
977fd_ebadf (EV_P) 2383fd_ebadf (EV_P)
978{ 2384{
979 int fd; 2385 int fd;
980 2386
981 for (fd = 0; fd < anfdmax; ++fd) 2387 for (fd = 0; fd < anfdmax; ++fd)
… …
983 if (!fd_valid (fd) && errno == EBADF) 2389 if (!fd_valid (fd) && errno == EBADF)
984 fd_kill (EV_A_ fd); 2390 fd_kill (EV_A_ fd);
985} 2391}
986 2392
987/* called on ENOMEM in select/poll to kill some fds and retry */ 2393/* called on ENOMEM in select/poll to kill some fds and retry */
988static void noinline 2394ecb_noinline ecb_cold
2395static void
989fd_enomem (EV_P) 2396fd_enomem (EV_P)
990{ 2397{
991 int fd; 2398 int fd;
992 2399
993 for (fd = anfdmax; fd--; ) 2400 for (fd = anfdmax; fd--; )
… …
997 break; 2404 break;
998 } 2405 }
999} 2406}
1000 2407
1001/* usually called after fork if backend needs to re-arm all fds from scratch */ 2408/* usually called after fork if backend needs to re-arm all fds from scratch */
1002static void noinline 2409ecb_noinline
2410static void
1003fd_rearm_all (EV_P) 2411fd_rearm_all (EV_P)
1004{ 2412{
1005 int fd; 2413 int fd;
1006 2414
1007 for (fd = 0; fd < anfdmax; ++fd) 2415 for (fd = 0; fd < anfdmax; ++fd)
… …
1011 anfds [fd].emask = 0; 2419 anfds [fd].emask = 0;
1012 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 2420 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1013 } 2421 }
1014} 2422}
1015 2423
2424/* used to prepare libev internal fd's */
2425/* this is not fork-safe */
2426inline_speed void
2427fd_intern (int fd)
2428{
2429#ifdef _WIN32
2430 unsigned long arg = 1;
2431 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2432#else
2433 fcntl (fd, F_SETFD, FD_CLOEXEC);
2434 fcntl (fd, F_SETFL, O_NONBLOCK);
2435#endif
2436}
2437
1016/*****************************************************************************/ 2438/*****************************************************************************/
1017 2439
1018/* 2440/*
1019 * the heap functions want a real array index. array index 0 uis guaranteed to not 2441 * the heap functions want a real array index. array index 0 is guaranteed to not
1020 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 2442 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1021 * the branching factor of the d-tree. 2443 * the branching factor of the d-tree.
1022 */ 2444 */
1023 2445
1024/* 2446/*
… …
1046 ev_tstamp minat; 2468 ev_tstamp minat;
1047 ANHE *minpos; 2469 ANHE *minpos;
1048 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2470 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1049 2471
1050 /* find minimum child */ 2472 /* find minimum child */
1051 if (expect_true (pos + DHEAP - 1 < E)) 2473 if (ecb_expect_true (pos + DHEAP - 1 < E))
1052 { 2474 {
1053 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2475 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1054 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2476 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1055 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2477 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1056 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2478 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1057 } 2479 }
1058 else if (pos < E) 2480 else if (pos < E)
1059 { 2481 {
1060 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2482 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1061 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2483 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1062 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2484 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1063 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2485 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1064 } 2486 }
1065 else 2487 else
1066 break; 2488 break;
1067 2489
1068 if (ANHE_at (he) <= minat) 2490 if (ANHE_at (he) <= minat)
… …
1076 2498
1077 heap [k] = he; 2499 heap [k] = he;
1078 ev_active (ANHE_w (he)) = k; 2500 ev_active (ANHE_w (he)) = k;
1079} 2501}
1080 2502
1081#else /* 4HEAP */ 2503#else /* not 4HEAP */
1082 2504
1083#define HEAP0 1 2505#define HEAP0 1
1084#define HPARENT(k) ((k) >> 1) 2506#define HPARENT(k) ((k) >> 1)
1085#define UPHEAP_DONE(p,k) (!(p)) 2507#define UPHEAP_DONE(p,k) (!(p))
1086 2508
… …
1172 2594
1173static ANSIG signals [EV_NSIG - 1]; 2595static ANSIG signals [EV_NSIG - 1];
1174 2596
1175/*****************************************************************************/ 2597/*****************************************************************************/
1176 2598
1177/* used to prepare libev internal fd's */ 2599#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1178/* this is not fork-safe */ 2600
2601ecb_noinline ecb_cold
2602static void
2603evpipe_init (EV_P)
2604{
2605 if (!ev_is_active (&pipe_w))
2606 {
2607 int fds [2];
2608
2609# if EV_USE_EVENTFD
2610 fds [0] = -1;
2611 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2612 if (fds [1] < 0 && errno == EINVAL)
2613 fds [1] = eventfd (0, 0);
2614
2615 if (fds [1] < 0)
2616# endif
2617 {
2618 while (pipe (fds))
2619 ev_syserr ("(libev) error creating signal/async pipe");
2620
2621 fd_intern (fds [0]);
2622 }
2623
2624 evpipe [0] = fds [0];
2625
2626 if (evpipe [1] < 0)
2627 evpipe [1] = fds [1]; /* first call, set write fd */
2628 else
2629 {
2630 /* on subsequent calls, do not change evpipe [1] */
2631 /* so that evpipe_write can always rely on its value. */
2632 /* this branch does not do anything sensible on windows, */
2633 /* so must not be executed on windows */
2634
2635 dup2 (fds [1], evpipe [1]);
2636 close (fds [1]);
2637 }
2638
2639 fd_intern (evpipe [1]);
2640
2641 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2642 ev_io_start (EV_A_ &pipe_w);
2643 ev_unref (EV_A); /* watcher should not keep loop alive */
2644 }
2645}
2646
1179inline_speed void 2647inline_speed void
1180fd_intern (int fd) 2648evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1181{ 2649{
1182#ifdef _WIN32 2650 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1183 unsigned long arg = 1;
1184 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1185#else
1186 fcntl (fd, F_SETFD, FD_CLOEXEC);
1187 fcntl (fd, F_SETFL, O_NONBLOCK);
1188#endif
1189}
1190 2651
1191static void noinline 2652 if (ecb_expect_true (*flag))
1192evpipe_init (EV_P) 2653 return;
1193{ 2654
1194 if (!ev_is_active (&pipe_w)) 2655 *flag = 1;
2656 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2657
2658 pipe_write_skipped = 1;
2659
2660 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2661
2662 if (pipe_write_wanted)
1195 { 2663 {
2664 int old_errno;
2665
2666 pipe_write_skipped = 0;
2667 ECB_MEMORY_FENCE_RELEASE;
2668
2669 old_errno = errno; /* save errno because write will clobber it */
2670
1196#if EV_USE_EVENTFD 2671#if EV_USE_EVENTFD
1197 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2672 if (evpipe [0] < 0)
1198 if (evfd < 0 && errno == EINVAL)
1199 evfd = eventfd (0, 0);
1200
1201 if (evfd >= 0)
1202 { 2673 {
1203 evpipe [0] = -1; 2674 uint64_t counter = 1;
1204 fd_intern (evfd); /* doing it twice doesn't hurt */ 2675 write (evpipe [1], &counter, sizeof (uint64_t));
1205 ev_io_set (&pipe_w, evfd, EV_READ);
1206 } 2676 }
1207 else 2677 else
1208#endif 2678#endif
1209 { 2679 {
1210 while (pipe (evpipe)) 2680#ifdef _WIN32
1211 ev_syserr ("(libev) error creating signal/async pipe"); 2681 WSABUF buf;
1212 2682 DWORD sent;
1213 fd_intern (evpipe [0]); 2683 buf.buf = (char *)&buf;
1214 fd_intern (evpipe [1]); 2684 buf.len = 1;
1215 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2685 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2686#else
2687 write (evpipe [1], &(evpipe [1]), 1);
2688#endif
1216 } 2689 }
1217
1218 ev_io_start (EV_A_ &pipe_w);
1219 ev_unref (EV_A); /* watcher should not keep loop alive */
1220 }
1221}
1222
1223inline_size void
1224evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1225{
1226 if (!*flag)
1227 {
1228 int old_errno = errno; /* save errno because write might clobber it */
1229
1230 *flag = 1;
1231
1232#if EV_USE_EVENTFD
1233 if (evfd >= 0)
1234 {
1235 uint64_t counter = 1;
1236 write (evfd, &counter, sizeof (uint64_t));
1237 }
1238 else
1239#endif
1240 write (evpipe [1], &old_errno, 1);
1241 2690
1242 errno = old_errno; 2691 errno = old_errno;
1243 } 2692 }
1244} 2693}
1245 2694
… …
1248static void 2697static void
1249pipecb (EV_P_ ev_io *iow, int revents) 2698pipecb (EV_P_ ev_io *iow, int revents)
1250{ 2699{
1251 int i; 2700 int i;
1252 2701
2702 if (revents & EV_READ)
2703 {
1253#if EV_USE_EVENTFD 2704#if EV_USE_EVENTFD
1254 if (evfd >= 0) 2705 if (evpipe [0] < 0)
1255 { 2706 {
1256 uint64_t counter; 2707 uint64_t counter;
1257 read (evfd, &counter, sizeof (uint64_t)); 2708 read (evpipe [1], &counter, sizeof (uint64_t));
1258 } 2709 }
1259 else 2710 else
1260#endif 2711#endif
1261 { 2712 {
1262 char dummy; 2713 char dummy[4];
2714#ifdef _WIN32
2715 WSABUF buf;
2716 DWORD recvd;
2717 DWORD flags = 0;
2718 buf.buf = dummy;
2719 buf.len = sizeof (dummy);
2720 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2721#else
1263 read (evpipe [0], &dummy, 1); 2722 read (evpipe [0], &dummy, sizeof (dummy));
2723#endif
2724 }
1264 } 2725 }
1265 2726
2727 pipe_write_skipped = 0;
2728
2729 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2730
2731#if EV_SIGNAL_ENABLE
1266 if (sig_pending) 2732 if (sig_pending)
1267 { 2733 {
1268 sig_pending = 0; 2734 sig_pending = 0;
1269 2735
2736 ECB_MEMORY_FENCE;
2737
1270 for (i = EV_NSIG - 1; i--; ) 2738 for (i = EV_NSIG - 1; i--; )
1271 if (expect_false (signals [i].pending)) 2739 if (ecb_expect_false (signals [i].pending))
1272 ev_feed_signal_event (EV_A_ i + 1); 2740 ev_feed_signal_event (EV_A_ i + 1);
1273 } 2741 }
2742#endif
1274 2743
1275#if EV_ASYNC_ENABLE 2744#if EV_ASYNC_ENABLE
1276 if (async_pending) 2745 if (async_pending)
1277 { 2746 {
1278 async_pending = 0; 2747 async_pending = 0;
2748
2749 ECB_MEMORY_FENCE;
1279 2750
1280 for (i = asynccnt; i--; ) 2751 for (i = asynccnt; i--; )
1281 if (asyncs [i]->sent) 2752 if (asyncs [i]->sent)
1282 { 2753 {
1283 asyncs [i]->sent = 0; 2754 asyncs [i]->sent = 0;
2755 ECB_MEMORY_FENCE_RELEASE;
1284 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2756 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1285 } 2757 }
1286 } 2758 }
1287#endif 2759#endif
1288} 2760}
1289 2761
1290/*****************************************************************************/ 2762/*****************************************************************************/
1291 2763
2764void
2765ev_feed_signal (int signum) EV_NOEXCEPT
2766{
2767#if EV_MULTIPLICITY
2768 EV_P;
2769 ECB_MEMORY_FENCE_ACQUIRE;
2770 EV_A = signals [signum - 1].loop;
2771
2772 if (!EV_A)
2773 return;
2774#endif
2775
2776 signals [signum - 1].pending = 1;
2777 evpipe_write (EV_A_ &sig_pending);
2778}
2779
1292static void 2780static void
1293ev_sighandler (int signum) 2781ev_sighandler (int signum)
1294{ 2782{
1295#if EV_MULTIPLICITY
1296 EV_P = signals [signum - 1].loop;
1297#endif
1298
1299#ifdef _WIN32 2783#ifdef _WIN32
1300 signal (signum, ev_sighandler); 2784 signal (signum, ev_sighandler);
1301#endif 2785#endif
1302 2786
1303 signals [signum - 1].pending = 1; 2787 ev_feed_signal (signum);
1304 evpipe_write (EV_A_ &sig_pending);
1305} 2788}
1306 2789
1307void noinline 2790ecb_noinline
2791void
1308ev_feed_signal_event (EV_P_ int signum) 2792ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1309{ 2793{
1310 WL w; 2794 WL w;
1311 2795
1312 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2796 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1313 return; 2797 return;
1314 2798
1315 --signum; 2799 --signum;
1316 2800
1317#if EV_MULTIPLICITY 2801#if EV_MULTIPLICITY
1318 /* it is permissible to try to feed a signal to the wrong loop */ 2802 /* it is permissible to try to feed a signal to the wrong loop */
1319 /* or, likely more useful, feeding a signal nobody is waiting for */ 2803 /* or, likely more useful, feeding a signal nobody is waiting for */
1320 2804
1321 if (expect_false (signals [signum].loop != EV_A)) 2805 if (ecb_expect_false (signals [signum].loop != EV_A))
1322 return; 2806 return;
1323#endif 2807#endif
1324 2808
1325 signals [signum].pending = 0; 2809 signals [signum].pending = 0;
2810 ECB_MEMORY_FENCE_RELEASE;
1326 2811
1327 for (w = signals [signum].head; w; w = w->next) 2812 for (w = signals [signum].head; w; w = w->next)
1328 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2813 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1329} 2814}
1330 2815
… …
1346 break; 2831 break;
1347 } 2832 }
1348} 2833}
1349#endif 2834#endif
1350 2835
2836#endif
2837
1351/*****************************************************************************/ 2838/*****************************************************************************/
1352 2839
2840#if EV_CHILD_ENABLE
1353static WL childs [EV_PID_HASHSIZE]; 2841static WL childs [EV_PID_HASHSIZE];
1354
1355#ifndef _WIN32
1356 2842
1357static ev_signal childev; 2843static ev_signal childev;
1358 2844
1359#ifndef WIFCONTINUED 2845#ifndef WIFCONTINUED
1360# define WIFCONTINUED(status) 0 2846# define WIFCONTINUED(status) 0
… …
1365child_reap (EV_P_ int chain, int pid, int status) 2851child_reap (EV_P_ int chain, int pid, int status)
1366{ 2852{
1367 ev_child *w; 2853 ev_child *w;
1368 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2854 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1369 2855
1370 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2856 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1371 { 2857 {
1372 if ((w->pid == pid || !w->pid) 2858 if ((w->pid == pid || !w->pid)
1373 && (!traced || (w->flags & 1))) 2859 && (!traced || (w->flags & 1)))
1374 { 2860 {
1375 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2861 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1400 /* make sure we are called again until all children have been reaped */ 2886 /* make sure we are called again until all children have been reaped */
1401 /* we need to do it this way so that the callback gets called before we continue */ 2887 /* we need to do it this way so that the callback gets called before we continue */
1402 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2888 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1403 2889
1404 child_reap (EV_A_ pid, pid, status); 2890 child_reap (EV_A_ pid, pid, status);
1405 if (EV_PID_HASHSIZE > 1) 2891 if ((EV_PID_HASHSIZE) > 1)
1406 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2892 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1407} 2893}
1408 2894
1409#endif 2895#endif
1410 2896
1411/*****************************************************************************/ 2897/*****************************************************************************/
1412 2898
2899#if EV_USE_TIMERFD
2900
2901static void periodics_reschedule (EV_P);
2902
2903static void
2904timerfdcb (EV_P_ ev_io *iow, int revents)
2905{
2906 struct itimerspec its = { 0 };
2907
2908 /* since we can't easily come zup with a (portable) maximum value of time_t,
2909 * we wake up once per month, which hopefully is rare enough to not
2910 * be a problem. */
2911 its.it_value.tv_sec = ev_rt_now + 86400 * 30;
2912 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0);
2913
2914 ev_rt_now = ev_time ();
2915 /* periodics_reschedule only needs ev_rt_now */
2916 /* but maybe in the future we want the full treatment. */
2917 /*
2918 now_floor = EV_TS_CONST (0.);
2919 time_update (EV_A_ EV_TSTAMP_HUGE);
2920 */
2921 periodics_reschedule (EV_A);
2922}
2923
2924ecb_noinline ecb_cold
2925static void
2926evtimerfd_init (EV_P)
2927{
2928 if (!ev_is_active (&timerfd_w))
2929 {
2930 timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
2931
2932 if (timerfd >= 0)
2933 {
2934 fd_intern (timerfd); /* just to be sure */
2935
2936 ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ);
2937 ev_set_priority (&timerfd_w, EV_MINPRI);
2938 ev_io_start (EV_A_ &timerfd_w);
2939 ev_unref (EV_A); /* watcher should not keep loop alive */
2940
2941 /* (re-) arm timer */
2942 timerfdcb (EV_A_ 0, 0);
2943 }
2944 }
2945}
2946
2947#endif
2948
2949/*****************************************************************************/
2950
2951#if EV_USE_IOCP
2952# include "ev_iocp.c"
2953#endif
1413#if EV_USE_PORT 2954#if EV_USE_PORT
1414# include "ev_port.c" 2955# include "ev_port.c"
1415#endif 2956#endif
1416#if EV_USE_KQUEUE 2957#if EV_USE_KQUEUE
1417# include "ev_kqueue.c" 2958# include "ev_kqueue.c"
1418#endif 2959#endif
1419#if EV_USE_EPOLL 2960#if EV_USE_EPOLL
1420# include "ev_epoll.c" 2961# include "ev_epoll.c"
1421#endif 2962#endif
2963#if EV_USE_LINUXAIO
2964# include "ev_linuxaio.c"
2965#endif
2966#if EV_USE_IOURING
2967# include "ev_iouring.c"
2968#endif
1422#if EV_USE_POLL 2969#if EV_USE_POLL
1423# include "ev_poll.c" 2970# include "ev_poll.c"
1424#endif 2971#endif
1425#if EV_USE_SELECT 2972#if EV_USE_SELECT
1426# include "ev_select.c" 2973# include "ev_select.c"
1427#endif 2974#endif
1428 2975
1429int 2976ecb_cold int
1430ev_version_major (void) 2977ev_version_major (void) EV_NOEXCEPT
1431{ 2978{
1432 return EV_VERSION_MAJOR; 2979 return EV_VERSION_MAJOR;
1433} 2980}
1434 2981
1435int 2982ecb_cold int
1436ev_version_minor (void) 2983ev_version_minor (void) EV_NOEXCEPT
1437{ 2984{
1438 return EV_VERSION_MINOR; 2985 return EV_VERSION_MINOR;
1439} 2986}
1440 2987
1441/* return true if we are running with elevated privileges and should ignore env variables */ 2988/* return true if we are running with elevated privileges and should ignore env variables */
1442int inline_size 2989inline_size ecb_cold int
1443enable_secure (void) 2990enable_secure (void)
1444{ 2991{
1445#ifdef _WIN32 2992#ifdef _WIN32
1446 return 0; 2993 return 0;
1447#else 2994#else
1448 return getuid () != geteuid () 2995 return getuid () != geteuid ()
1449 || getgid () != getegid (); 2996 || getgid () != getegid ();
1450#endif 2997#endif
1451} 2998}
1452 2999
3000ecb_cold
1453unsigned int 3001unsigned int
1454ev_supported_backends (void) 3002ev_supported_backends (void) EV_NOEXCEPT
1455{ 3003{
1456 unsigned int flags = 0; 3004 unsigned int flags = 0;
1457 3005
1458 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3006 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1459 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 3007 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1460 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3008 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1461 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3009 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
1462 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 3010 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
1463 3011 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3012 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3013
1464 return flags; 3014 return flags;
1465} 3015}
1466 3016
3017ecb_cold
1467unsigned int 3018unsigned int
1468ev_recommended_backends (void) 3019ev_recommended_backends (void) EV_NOEXCEPT
1469{ 3020{
1470 unsigned int flags = ev_supported_backends (); 3021 unsigned int flags = ev_supported_backends ();
1471 3022
1472#ifndef __NetBSD__ 3023#ifndef __NetBSD__
1473 /* kqueue is borked on everything but netbsd apparently */ 3024 /* kqueue is borked on everything but netbsd apparently */
… …
1477#ifdef __APPLE__ 3028#ifdef __APPLE__
1478 /* only select works correctly on that "unix-certified" platform */ 3029 /* only select works correctly on that "unix-certified" platform */
1479 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 3030 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1480 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 3031 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1481#endif 3032#endif
3033#ifdef __FreeBSD__
3034 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
3035#endif
3036
3037 /* TODO: linuxaio is very experimental */
3038#if !EV_RECOMMEND_LINUXAIO
3039 flags &= ~EVBACKEND_LINUXAIO;
3040#endif
3041 /* TODO: linuxaio is super experimental */
3042#if !EV_RECOMMEND_IOURING
3043 flags &= ~EVBACKEND_IOURING;
3044#endif
1482 3045
1483 return flags; 3046 return flags;
1484} 3047}
1485 3048
3049ecb_cold
1486unsigned int 3050unsigned int
1487ev_embeddable_backends (void) 3051ev_embeddable_backends (void) EV_NOEXCEPT
1488{ 3052{
1489 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3053 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1490 3054
1491 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 3055 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1492 /* please fix it and tell me how to detect the fix */ 3056 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1493 flags &= ~EVBACKEND_EPOLL; 3057 flags &= ~EVBACKEND_EPOLL;
3058
3059 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
3060
3061 /* EVBACKEND_IOURING is practically embeddable, but the current implementation is not
3062 * because our backend_fd is the epoll fd we need as fallback.
3063 * if the kernel ever is fixed, this might change...
3064 */
1494 3065
1495 return flags; 3066 return flags;
1496} 3067}
1497 3068
1498unsigned int 3069unsigned int
1499ev_backend (EV_P) 3070ev_backend (EV_P) EV_NOEXCEPT
1500{ 3071{
1501 return backend; 3072 return backend;
1502} 3073}
1503 3074
1504#if EV_MINIMAL < 2 3075#if EV_FEATURE_API
1505unsigned int 3076unsigned int
1506ev_loop_count (EV_P) 3077ev_iteration (EV_P) EV_NOEXCEPT
1507{ 3078{
1508 return loop_count; 3079 return loop_count;
1509} 3080}
1510 3081
1511unsigned int 3082unsigned int
1512ev_loop_depth (EV_P) 3083ev_depth (EV_P) EV_NOEXCEPT
1513{ 3084{
1514 return loop_depth; 3085 return loop_depth;
1515} 3086}
1516 3087
1517void 3088void
1518ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 3089ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1519{ 3090{
1520 io_blocktime = interval; 3091 io_blocktime = interval;
1521} 3092}
1522 3093
1523void 3094void
1524ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 3095ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1525{ 3096{
1526 timeout_blocktime = interval; 3097 timeout_blocktime = interval;
1527} 3098}
1528 3099
1529void 3100void
1530ev_set_userdata (EV_P_ void *data) 3101ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1531{ 3102{
1532 userdata = data; 3103 userdata = data;
1533} 3104}
1534 3105
1535void * 3106void *
1536ev_userdata (EV_P) 3107ev_userdata (EV_P) EV_NOEXCEPT
1537{ 3108{
1538 return userdata; 3109 return userdata;
1539} 3110}
1540 3111
3112void
1541void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 3113ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1542{ 3114{
1543 invoke_cb = invoke_pending_cb; 3115 invoke_cb = invoke_pending_cb;
1544} 3116}
1545 3117
3118void
1546void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 3119ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1547{ 3120{
1548 release_cb = release; 3121 release_cb = release;
1549 acquire_cb = acquire; 3122 acquire_cb = acquire;
1550} 3123}
1551#endif 3124#endif
1552 3125
1553/* initialise a loop structure, must be zero-initialised */ 3126/* initialise a loop structure, must be zero-initialised */
1554static void noinline 3127ecb_noinline ecb_cold
3128static void
1555loop_init (EV_P_ unsigned int flags) 3129loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1556{ 3130{
1557 if (!backend) 3131 if (!backend)
1558 { 3132 {
3133 origflags = flags;
3134
1559#if EV_USE_REALTIME 3135#if EV_USE_REALTIME
1560 if (!have_realtime) 3136 if (!have_realtime)
1561 { 3137 {
1562 struct timespec ts; 3138 struct timespec ts;
1563 3139
… …
1585 if (!(flags & EVFLAG_NOENV) 3161 if (!(flags & EVFLAG_NOENV)
1586 && !enable_secure () 3162 && !enable_secure ()
1587 && getenv ("LIBEV_FLAGS")) 3163 && getenv ("LIBEV_FLAGS"))
1588 flags = atoi (getenv ("LIBEV_FLAGS")); 3164 flags = atoi (getenv ("LIBEV_FLAGS"));
1589 3165
1590 ev_rt_now = ev_time (); 3166 ev_rt_now = ev_time ();
1591 mn_now = get_clock (); 3167 mn_now = get_clock ();
1592 now_floor = mn_now; 3168 now_floor = mn_now;
1593 rtmn_diff = ev_rt_now - mn_now; 3169 rtmn_diff = ev_rt_now - mn_now;
1594#if EV_MINIMAL < 2 3170#if EV_FEATURE_API
1595 invoke_cb = ev_invoke_pending; 3171 invoke_cb = ev_invoke_pending;
1596#endif 3172#endif
1597 3173
1598 io_blocktime = 0.; 3174 io_blocktime = 0.;
1599 timeout_blocktime = 0.; 3175 timeout_blocktime = 0.;
1600 backend = 0; 3176 backend = 0;
1601 backend_fd = -1; 3177 backend_fd = -1;
1602 sig_pending = 0; 3178 sig_pending = 0;
1603#if EV_ASYNC_ENABLE 3179#if EV_ASYNC_ENABLE
1604 async_pending = 0; 3180 async_pending = 0;
1605#endif 3181#endif
3182 pipe_write_skipped = 0;
3183 pipe_write_wanted = 0;
3184 evpipe [0] = -1;
3185 evpipe [1] = -1;
1606#if EV_USE_INOTIFY 3186#if EV_USE_INOTIFY
1607 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3187 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1608#endif 3188#endif
1609#if EV_USE_SIGNALFD 3189#if EV_USE_SIGNALFD
1610 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3190 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1611#endif 3191#endif
3192#if EV_USE_TIMERFD
3193 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3194#endif
1612 3195
1613 if (!(flags & 0x0000ffffU)) 3196 if (!(flags & EVBACKEND_MASK))
1614 flags |= ev_recommended_backends (); 3197 flags |= ev_recommended_backends ();
1615 3198
3199#if EV_USE_IOCP
3200 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3201#endif
1616#if EV_USE_PORT 3202#if EV_USE_PORT
1617 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3203 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1618#endif 3204#endif
1619#if EV_USE_KQUEUE 3205#if EV_USE_KQUEUE
1620 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3206 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3207#endif
3208#if EV_USE_IOURING
3209 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3210#endif
3211#if EV_USE_LINUXAIO
3212 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1621#endif 3213#endif
1622#if EV_USE_EPOLL 3214#if EV_USE_EPOLL
1623 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3215 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1624#endif 3216#endif
1625#if EV_USE_POLL 3217#if EV_USE_POLL
1626 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3218 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1627#endif 3219#endif
1628#if EV_USE_SELECT 3220#if EV_USE_SELECT
1629 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3221 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1630#endif 3222#endif
1631 3223
1632 ev_prepare_init (&pending_w, pendingcb); 3224 ev_prepare_init (&pending_w, pendingcb);
1633 3225
3226#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1634 ev_init (&pipe_w, pipecb); 3227 ev_init (&pipe_w, pipecb);
1635 ev_set_priority (&pipe_w, EV_MAXPRI); 3228 ev_set_priority (&pipe_w, EV_MAXPRI);
3229#endif
1636 } 3230 }
1637} 3231}
1638 3232
1639/* free up a loop structure */ 3233/* free up a loop structure */
1640static void noinline 3234ecb_cold
3235void
1641loop_destroy (EV_P) 3236ev_loop_destroy (EV_P)
1642{ 3237{
1643 int i; 3238 int i;
3239
3240#if EV_MULTIPLICITY
3241 /* mimic free (0) */
3242 if (!EV_A)
3243 return;
3244#endif
3245
3246#if EV_CLEANUP_ENABLE
3247 /* queue cleanup watchers (and execute them) */
3248 if (ecb_expect_false (cleanupcnt))
3249 {
3250 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3251 EV_INVOKE_PENDING;
3252 }
3253#endif
3254
3255#if EV_CHILD_ENABLE
3256 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3257 {
3258 ev_ref (EV_A); /* child watcher */
3259 ev_signal_stop (EV_A_ &childev);
3260 }
3261#endif
1644 3262
1645 if (ev_is_active (&pipe_w)) 3263 if (ev_is_active (&pipe_w))
1646 { 3264 {
1647 /*ev_ref (EV_A);*/ 3265 /*ev_ref (EV_A);*/
1648 /*ev_io_stop (EV_A_ &pipe_w);*/ 3266 /*ev_io_stop (EV_A_ &pipe_w);*/
1649 3267
1650#if EV_USE_EVENTFD
1651 if (evfd >= 0)
1652 close (evfd);
1653#endif
1654
1655 if (evpipe [0] >= 0)
1656 {
1657 EV_WIN32_CLOSE_FD (evpipe [0]); 3268 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1658 EV_WIN32_CLOSE_FD (evpipe [1]); 3269 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1659 }
1660 } 3270 }
1661 3271
1662#if EV_USE_SIGNALFD 3272#if EV_USE_SIGNALFD
1663 if (ev_is_active (&sigfd_w)) 3273 if (ev_is_active (&sigfd_w))
1664 close (sigfd); 3274 close (sigfd);
1665#endif 3275#endif
1666 3276
3277#if EV_USE_TIMERFD
3278 if (ev_is_active (&timerfd_w))
3279 close (timerfd);
3280#endif
3281
1667#if EV_USE_INOTIFY 3282#if EV_USE_INOTIFY
1668 if (fs_fd >= 0) 3283 if (fs_fd >= 0)
1669 close (fs_fd); 3284 close (fs_fd);
1670#endif 3285#endif
1671 3286
1672 if (backend_fd >= 0) 3287 if (backend_fd >= 0)
1673 close (backend_fd); 3288 close (backend_fd);
1674 3289
3290#if EV_USE_IOCP
3291 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3292#endif
1675#if EV_USE_PORT 3293#if EV_USE_PORT
1676 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3294 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1677#endif 3295#endif
1678#if EV_USE_KQUEUE 3296#if EV_USE_KQUEUE
1679 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3297 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3298#endif
3299#if EV_USE_IOURING
3300 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3301#endif
3302#if EV_USE_LINUXAIO
3303 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1680#endif 3304#endif
1681#if EV_USE_EPOLL 3305#if EV_USE_EPOLL
1682 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3306 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1683#endif 3307#endif
1684#if EV_USE_POLL 3308#if EV_USE_POLL
1685 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3309 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1686#endif 3310#endif
1687#if EV_USE_SELECT 3311#if EV_USE_SELECT
1688 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3312 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1689#endif 3313#endif
1690 3314
1691 for (i = NUMPRI; i--; ) 3315 for (i = NUMPRI; i--; )
1692 { 3316 {
1693 array_free (pending, [i]); 3317 array_free (pending, [i]);
… …
1706 array_free (periodic, EMPTY); 3330 array_free (periodic, EMPTY);
1707#endif 3331#endif
1708#if EV_FORK_ENABLE 3332#if EV_FORK_ENABLE
1709 array_free (fork, EMPTY); 3333 array_free (fork, EMPTY);
1710#endif 3334#endif
3335#if EV_CLEANUP_ENABLE
3336 array_free (cleanup, EMPTY);
3337#endif
1711 array_free (prepare, EMPTY); 3338 array_free (prepare, EMPTY);
1712 array_free (check, EMPTY); 3339 array_free (check, EMPTY);
1713#if EV_ASYNC_ENABLE 3340#if EV_ASYNC_ENABLE
1714 array_free (async, EMPTY); 3341 array_free (async, EMPTY);
1715#endif 3342#endif
1716 3343
1717 backend = 0; 3344 backend = 0;
3345
3346#if EV_MULTIPLICITY
3347 if (ev_is_default_loop (EV_A))
3348#endif
3349 ev_default_loop_ptr = 0;
3350#if EV_MULTIPLICITY
3351 else
3352 ev_free (EV_A);
3353#endif
1718} 3354}
1719 3355
1720#if EV_USE_INOTIFY 3356#if EV_USE_INOTIFY
1721inline_size void infy_fork (EV_P); 3357inline_size void infy_fork (EV_P);
1722#endif 3358#endif
1723 3359
1724inline_size void 3360inline_size void
1725loop_fork (EV_P) 3361loop_fork (EV_P)
1726{ 3362{
1727#if EV_USE_PORT 3363#if EV_USE_PORT
1728 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3364 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1729#endif 3365#endif
1730#if EV_USE_KQUEUE 3366#if EV_USE_KQUEUE
1731 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3367 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3368#endif
3369#if EV_USE_IOURING
3370 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3371#endif
3372#if EV_USE_LINUXAIO
3373 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1732#endif 3374#endif
1733#if EV_USE_EPOLL 3375#if EV_USE_EPOLL
1734 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3376 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1735#endif 3377#endif
1736#if EV_USE_INOTIFY 3378#if EV_USE_INOTIFY
1737 infy_fork (EV_A); 3379 infy_fork (EV_A);
1738#endif 3380#endif
1739 3381
3382 if (postfork != 2)
3383 {
3384 #if EV_USE_SIGNALFD
3385 /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */
3386 #endif
3387
3388 #if EV_USE_TIMERFD
3389 if (ev_is_active (&timerfd_w))
3390 {
3391 ev_ref (EV_A);
3392 ev_io_stop (EV_A_ &timerfd_w);
3393
3394 close (timerfd);
3395 timerfd = -2;
3396
3397 evtimerfd_init (EV_A);
3398 /* reschedule periodics, in case we missed something */
3399 ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM);
3400 }
3401 #endif
3402
3403 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1740 if (ev_is_active (&pipe_w)) 3404 if (ev_is_active (&pipe_w))
1741 { 3405 {
1742 /* this "locks" the handlers against writing to the pipe */ 3406 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1743 /* while we modify the fd vars */ 3407
1744 sig_pending = 1;
1745#if EV_ASYNC_ENABLE
1746 async_pending = 1;
1747#endif
1748
1749 ev_ref (EV_A); 3408 ev_ref (EV_A);
1750 ev_io_stop (EV_A_ &pipe_w); 3409 ev_io_stop (EV_A_ &pipe_w);
1751 3410
1752#if EV_USE_EVENTFD
1753 if (evfd >= 0)
1754 close (evfd);
1755#endif
1756
1757 if (evpipe [0] >= 0) 3411 if (evpipe [0] >= 0)
1758 {
1759 EV_WIN32_CLOSE_FD (evpipe [0]); 3412 EV_WIN32_CLOSE_FD (evpipe [0]);
1760 EV_WIN32_CLOSE_FD (evpipe [1]); 3413
3414 evpipe_init (EV_A);
3415 /* iterate over everything, in case we missed something before */
3416 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1761 } 3417 }
1762 3418 #endif
1763 evpipe_init (EV_A);
1764 /* now iterate over everything, in case we missed something */
1765 pipecb (EV_A_ &pipe_w, EV_READ);
1766 } 3419 }
1767 3420
1768 postfork = 0; 3421 postfork = 0;
1769} 3422}
1770 3423
1771#if EV_MULTIPLICITY 3424#if EV_MULTIPLICITY
1772 3425
3426ecb_cold
1773struct ev_loop * 3427struct ev_loop *
1774ev_loop_new (unsigned int flags) 3428ev_loop_new (unsigned int flags) EV_NOEXCEPT
1775{ 3429{
1776 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3430 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1777 3431
1778 memset (EV_A, 0, sizeof (struct ev_loop)); 3432 memset (EV_A, 0, sizeof (struct ev_loop));
1779 loop_init (EV_A_ flags); 3433 loop_init (EV_A_ flags);
1780 3434
1781 if (ev_backend (EV_A)) 3435 if (ev_backend (EV_A))
1782 return EV_A; 3436 return EV_A;
1783 3437
3438 ev_free (EV_A);
1784 return 0; 3439 return 0;
1785} 3440}
1786 3441
1787void
1788ev_loop_destroy (EV_P)
1789{
1790 loop_destroy (EV_A);
1791 ev_free (loop);
1792}
1793
1794void
1795ev_loop_fork (EV_P)
1796{
1797 postfork = 1; /* must be in line with ev_default_fork */
1798}
1799#endif /* multiplicity */ 3442#endif /* multiplicity */
1800 3443
1801#if EV_VERIFY 3444#if EV_VERIFY
1802static void noinline 3445ecb_noinline ecb_cold
3446static void
1803verify_watcher (EV_P_ W w) 3447verify_watcher (EV_P_ W w)
1804{ 3448{
1805 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3449 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1806 3450
1807 if (w->pending) 3451 if (w->pending)
1808 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3452 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1809} 3453}
1810 3454
1811static void noinline 3455ecb_noinline ecb_cold
3456static void
1812verify_heap (EV_P_ ANHE *heap, int N) 3457verify_heap (EV_P_ ANHE *heap, int N)
1813{ 3458{
1814 int i; 3459 int i;
1815 3460
1816 for (i = HEAP0; i < N + HEAP0; ++i) 3461 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1821 3466
1822 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3467 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1823 } 3468 }
1824} 3469}
1825 3470
1826static void noinline 3471ecb_noinline ecb_cold
3472static void
1827array_verify (EV_P_ W *ws, int cnt) 3473array_verify (EV_P_ W *ws, int cnt)
1828{ 3474{
1829 while (cnt--) 3475 while (cnt--)
1830 { 3476 {
1831 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3477 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1832 verify_watcher (EV_A_ ws [cnt]); 3478 verify_watcher (EV_A_ ws [cnt]);
1833 } 3479 }
1834} 3480}
1835#endif 3481#endif
1836 3482
1837#if EV_MINIMAL < 2 3483#if EV_FEATURE_API
1838void 3484void ecb_cold
1839ev_loop_verify (EV_P) 3485ev_verify (EV_P) EV_NOEXCEPT
1840{ 3486{
1841#if EV_VERIFY 3487#if EV_VERIFY
1842 int i; 3488 int i;
1843 WL w; 3489 WL w, w2;
1844 3490
1845 assert (activecnt >= -1); 3491 assert (activecnt >= -1);
1846 3492
1847 assert (fdchangemax >= fdchangecnt); 3493 assert (fdchangemax >= fdchangecnt);
1848 for (i = 0; i < fdchangecnt; ++i) 3494 for (i = 0; i < fdchangecnt; ++i)
1849 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3495 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1850 3496
1851 assert (anfdmax >= 0); 3497 assert (anfdmax >= 0);
1852 for (i = 0; i < anfdmax; ++i) 3498 for (i = 0; i < anfdmax; ++i)
3499 {
3500 int j = 0;
3501
1853 for (w = anfds [i].head; w; w = w->next) 3502 for (w = w2 = anfds [i].head; w; w = w->next)
1854 { 3503 {
1855 verify_watcher (EV_A_ (W)w); 3504 verify_watcher (EV_A_ (W)w);
3505
3506 if (j++ & 1)
3507 {
3508 assert (("libev: io watcher list contains a loop", w != w2));
3509 w2 = w2->next;
3510 }
3511
1856 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3512 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1857 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3513 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1858 } 3514 }
3515 }
1859 3516
1860 assert (timermax >= timercnt); 3517 assert (timermax >= timercnt);
1861 verify_heap (EV_A_ timers, timercnt); 3518 verify_heap (EV_A_ timers, timercnt);
1862 3519
1863#if EV_PERIODIC_ENABLE 3520#if EV_PERIODIC_ENABLE
… …
1878#if EV_FORK_ENABLE 3535#if EV_FORK_ENABLE
1879 assert (forkmax >= forkcnt); 3536 assert (forkmax >= forkcnt);
1880 array_verify (EV_A_ (W *)forks, forkcnt); 3537 array_verify (EV_A_ (W *)forks, forkcnt);
1881#endif 3538#endif
1882 3539
3540#if EV_CLEANUP_ENABLE
3541 assert (cleanupmax >= cleanupcnt);
3542 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3543#endif
3544
1883#if EV_ASYNC_ENABLE 3545#if EV_ASYNC_ENABLE
1884 assert (asyncmax >= asynccnt); 3546 assert (asyncmax >= asynccnt);
1885 array_verify (EV_A_ (W *)asyncs, asynccnt); 3547 array_verify (EV_A_ (W *)asyncs, asynccnt);
1886#endif 3548#endif
1887 3549
3550#if EV_PREPARE_ENABLE
1888 assert (preparemax >= preparecnt); 3551 assert (preparemax >= preparecnt);
1889 array_verify (EV_A_ (W *)prepares, preparecnt); 3552 array_verify (EV_A_ (W *)prepares, preparecnt);
3553#endif
1890 3554
3555#if EV_CHECK_ENABLE
1891 assert (checkmax >= checkcnt); 3556 assert (checkmax >= checkcnt);
1892 array_verify (EV_A_ (W *)checks, checkcnt); 3557 array_verify (EV_A_ (W *)checks, checkcnt);
3558#endif
1893 3559
1894# if 0 3560# if 0
3561#if EV_CHILD_ENABLE
1895 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 3562 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1896 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) 3563 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3564#endif
1897# endif 3565# endif
1898#endif 3566#endif
1899} 3567}
1900#endif 3568#endif
1901 3569
1902#if EV_MULTIPLICITY 3570#if EV_MULTIPLICITY
3571ecb_cold
1903struct ev_loop * 3572struct ev_loop *
1904ev_default_loop_init (unsigned int flags)
1905#else 3573#else
1906int 3574int
3575#endif
1907ev_default_loop (unsigned int flags) 3576ev_default_loop (unsigned int flags) EV_NOEXCEPT
1908#endif
1909{ 3577{
1910 if (!ev_default_loop_ptr) 3578 if (!ev_default_loop_ptr)
1911 { 3579 {
1912#if EV_MULTIPLICITY 3580#if EV_MULTIPLICITY
1913 EV_P = ev_default_loop_ptr = &default_loop_struct; 3581 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1917 3585
1918 loop_init (EV_A_ flags); 3586 loop_init (EV_A_ flags);
1919 3587
1920 if (ev_backend (EV_A)) 3588 if (ev_backend (EV_A))
1921 { 3589 {
1922#ifndef _WIN32 3590#if EV_CHILD_ENABLE
1923 ev_signal_init (&childev, childcb, SIGCHLD); 3591 ev_signal_init (&childev, childcb, SIGCHLD);
1924 ev_set_priority (&childev, EV_MAXPRI); 3592 ev_set_priority (&childev, EV_MAXPRI);
1925 ev_signal_start (EV_A_ &childev); 3593 ev_signal_start (EV_A_ &childev);
1926 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3594 ev_unref (EV_A); /* child watcher should not keep loop alive */
1927#endif 3595#endif
… …
1932 3600
1933 return ev_default_loop_ptr; 3601 return ev_default_loop_ptr;
1934} 3602}
1935 3603
1936void 3604void
1937ev_default_destroy (void) 3605ev_loop_fork (EV_P) EV_NOEXCEPT
1938{ 3606{
1939#if EV_MULTIPLICITY 3607 postfork = 1;
1940 EV_P = ev_default_loop_ptr;
1941#endif
1942
1943 ev_default_loop_ptr = 0;
1944
1945#ifndef _WIN32
1946 ev_ref (EV_A); /* child watcher */
1947 ev_signal_stop (EV_A_ &childev);
1948#endif
1949
1950 loop_destroy (EV_A);
1951}
1952
1953void
1954ev_default_fork (void)
1955{
1956#if EV_MULTIPLICITY
1957 EV_P = ev_default_loop_ptr;
1958#endif
1959
1960 postfork = 1; /* must be in line with ev_loop_fork */
1961} 3608}
1962 3609
1963/*****************************************************************************/ 3610/*****************************************************************************/
1964 3611
1965void 3612void
… …
1967{ 3614{
1968 EV_CB_INVOKE ((W)w, revents); 3615 EV_CB_INVOKE ((W)w, revents);
1969} 3616}
1970 3617
1971unsigned int 3618unsigned int
1972ev_pending_count (EV_P) 3619ev_pending_count (EV_P) EV_NOEXCEPT
1973{ 3620{
1974 int pri; 3621 int pri;
1975 unsigned int count = 0; 3622 unsigned int count = 0;
1976 3623
1977 for (pri = NUMPRI; pri--; ) 3624 for (pri = NUMPRI; pri--; )
1978 count += pendingcnt [pri]; 3625 count += pendingcnt [pri];
1979 3626
1980 return count; 3627 return count;
1981} 3628}
1982 3629
1983void noinline 3630ecb_noinline
3631void
1984ev_invoke_pending (EV_P) 3632ev_invoke_pending (EV_P)
1985{ 3633{
1986 int pri; 3634 pendingpri = NUMPRI;
1987 3635
1988 for (pri = NUMPRI; pri--; ) 3636 do
3637 {
3638 --pendingpri;
3639
3640 /* pendingpri possibly gets modified in the inner loop */
1989 while (pendingcnt [pri]) 3641 while (pendingcnt [pendingpri])
1990 { 3642 {
1991 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3643 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1992 3644
1993 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1994 /* ^ this is no longer true, as pending_w could be here */
1995
1996 p->w->pending = 0; 3645 p->w->pending = 0;
1997 EV_CB_INVOKE (p->w, p->events); 3646 EV_CB_INVOKE (p->w, p->events);
1998 EV_FREQUENT_CHECK; 3647 EV_FREQUENT_CHECK;
1999 } 3648 }
3649 }
3650 while (pendingpri);
2000} 3651}
2001 3652
2002#if EV_IDLE_ENABLE 3653#if EV_IDLE_ENABLE
2003/* make idle watchers pending. this handles the "call-idle */ 3654/* make idle watchers pending. this handles the "call-idle */
2004/* only when higher priorities are idle" logic */ 3655/* only when higher priorities are idle" logic */
2005inline_size void 3656inline_size void
2006idle_reify (EV_P) 3657idle_reify (EV_P)
2007{ 3658{
2008 if (expect_false (idleall)) 3659 if (ecb_expect_false (idleall))
2009 { 3660 {
2010 int pri; 3661 int pri;
2011 3662
2012 for (pri = NUMPRI; pri--; ) 3663 for (pri = NUMPRI; pri--; )
2013 { 3664 {
… …
2043 { 3694 {
2044 ev_at (w) += w->repeat; 3695 ev_at (w) += w->repeat;
2045 if (ev_at (w) < mn_now) 3696 if (ev_at (w) < mn_now)
2046 ev_at (w) = mn_now; 3697 ev_at (w) = mn_now;
2047 3698
2048 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3699 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
2049 3700
2050 ANHE_at_cache (timers [HEAP0]); 3701 ANHE_at_cache (timers [HEAP0]);
2051 downheap (timers, timercnt, HEAP0); 3702 downheap (timers, timercnt, HEAP0);
2052 } 3703 }
2053 else 3704 else
… …
2056 EV_FREQUENT_CHECK; 3707 EV_FREQUENT_CHECK;
2057 feed_reverse (EV_A_ (W)w); 3708 feed_reverse (EV_A_ (W)w);
2058 } 3709 }
2059 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 3710 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2060 3711
2061 feed_reverse_done (EV_A_ EV_TIMEOUT); 3712 feed_reverse_done (EV_A_ EV_TIMER);
2062 } 3713 }
2063} 3714}
2064 3715
2065#if EV_PERIODIC_ENABLE 3716#if EV_PERIODIC_ENABLE
3717
3718ecb_noinline
3719static void
3720periodic_recalc (EV_P_ ev_periodic *w)
3721{
3722 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3723 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3724
3725 /* the above almost always errs on the low side */
3726 while (at <= ev_rt_now)
3727 {
3728 ev_tstamp nat = at + w->interval;
3729
3730 /* when resolution fails us, we use ev_rt_now */
3731 if (ecb_expect_false (nat == at))
3732 {
3733 at = ev_rt_now;
3734 break;
3735 }
3736
3737 at = nat;
3738 }
3739
3740 ev_at (w) = at;
3741}
3742
2066/* make periodics pending */ 3743/* make periodics pending */
2067inline_size void 3744inline_size void
2068periodics_reify (EV_P) 3745periodics_reify (EV_P)
2069{ 3746{
2070 EV_FREQUENT_CHECK; 3747 EV_FREQUENT_CHECK;
2071 3748
2072 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3749 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2073 { 3750 {
2074 int feed_count = 0;
2075
2076 do 3751 do
2077 { 3752 {
2078 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3753 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2079 3754
2080 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3755 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2089 ANHE_at_cache (periodics [HEAP0]); 3764 ANHE_at_cache (periodics [HEAP0]);
2090 downheap (periodics, periodiccnt, HEAP0); 3765 downheap (periodics, periodiccnt, HEAP0);
2091 } 3766 }
2092 else if (w->interval) 3767 else if (w->interval)
2093 { 3768 {
2094 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3769 periodic_recalc (EV_A_ w);
2095 /* if next trigger time is not sufficiently in the future, put it there */
2096 /* this might happen because of floating point inexactness */
2097 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2098 {
2099 ev_at (w) += w->interval;
2100
2101 /* if interval is unreasonably low we might still have a time in the past */
2102 /* so correct this. this will make the periodic very inexact, but the user */
2103 /* has effectively asked to get triggered more often than possible */
2104 if (ev_at (w) < ev_rt_now)
2105 ev_at (w) = ev_rt_now;
2106 }
2107
2108 ANHE_at_cache (periodics [HEAP0]); 3770 ANHE_at_cache (periodics [HEAP0]);
2109 downheap (periodics, periodiccnt, HEAP0); 3771 downheap (periodics, periodiccnt, HEAP0);
2110 } 3772 }
2111 else 3773 else
2112 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3774 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2119 feed_reverse_done (EV_A_ EV_PERIODIC); 3781 feed_reverse_done (EV_A_ EV_PERIODIC);
2120 } 3782 }
2121} 3783}
2122 3784
2123/* simply recalculate all periodics */ 3785/* simply recalculate all periodics */
2124/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 3786/* TODO: maybe ensure that at least one event happens when jumping forward? */
2125static void noinline 3787ecb_noinline ecb_cold
3788static void
2126periodics_reschedule (EV_P) 3789periodics_reschedule (EV_P)
2127{ 3790{
2128 int i; 3791 int i;
2129 3792
2130 /* adjust periodics after time jump */ 3793 /* adjust periodics after time jump */
… …
2133 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3796 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2134 3797
2135 if (w->reschedule_cb) 3798 if (w->reschedule_cb)
2136 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3799 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2137 else if (w->interval) 3800 else if (w->interval)
2138 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3801 periodic_recalc (EV_A_ w);
2139 3802
2140 ANHE_at_cache (periodics [i]); 3803 ANHE_at_cache (periodics [i]);
2141 } 3804 }
2142 3805
2143 reheap (periodics, periodiccnt); 3806 reheap (periodics, periodiccnt);
2144} 3807}
2145#endif 3808#endif
2146 3809
2147/* adjust all timers by a given offset */ 3810/* adjust all timers by a given offset */
2148static void noinline 3811ecb_noinline ecb_cold
3812static void
2149timers_reschedule (EV_P_ ev_tstamp adjust) 3813timers_reschedule (EV_P_ ev_tstamp adjust)
2150{ 3814{
2151 int i; 3815 int i;
2152 3816
2153 for (i = 0; i < timercnt; ++i) 3817 for (i = 0; i < timercnt; ++i)
… …
2157 ANHE_at_cache (*he); 3821 ANHE_at_cache (*he);
2158 } 3822 }
2159} 3823}
2160 3824
2161/* fetch new monotonic and realtime times from the kernel */ 3825/* fetch new monotonic and realtime times from the kernel */
2162/* also detetc if there was a timejump, and act accordingly */ 3826/* also detect if there was a timejump, and act accordingly */
2163inline_speed void 3827inline_speed void
2164time_update (EV_P_ ev_tstamp max_block) 3828time_update (EV_P_ ev_tstamp max_block)
2165{ 3829{
2166#if EV_USE_MONOTONIC 3830#if EV_USE_MONOTONIC
2167 if (expect_true (have_monotonic)) 3831 if (ecb_expect_true (have_monotonic))
2168 { 3832 {
2169 int i; 3833 int i;
2170 ev_tstamp odiff = rtmn_diff; 3834 ev_tstamp odiff = rtmn_diff;
2171 3835
2172 mn_now = get_clock (); 3836 mn_now = get_clock ();
2173 3837
2174 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3838 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2175 /* interpolate in the meantime */ 3839 /* interpolate in the meantime */
2176 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3840 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
2177 { 3841 {
2178 ev_rt_now = rtmn_diff + mn_now; 3842 ev_rt_now = rtmn_diff + mn_now;
2179 return; 3843 return;
2180 } 3844 }
2181 3845
… …
2190 * doesn't hurt either as we only do this on time-jumps or 3854 * doesn't hurt either as we only do this on time-jumps or
2191 * in the unlikely event of having been preempted here. 3855 * in the unlikely event of having been preempted here.
2192 */ 3856 */
2193 for (i = 4; --i; ) 3857 for (i = 4; --i; )
2194 { 3858 {
3859 ev_tstamp diff;
2195 rtmn_diff = ev_rt_now - mn_now; 3860 rtmn_diff = ev_rt_now - mn_now;
2196 3861
2197 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3862 diff = odiff - rtmn_diff;
3863
3864 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
2198 return; /* all is well */ 3865 return; /* all is well */
2199 3866
2200 ev_rt_now = ev_time (); 3867 ev_rt_now = ev_time ();
2201 mn_now = get_clock (); 3868 mn_now = get_clock ();
2202 now_floor = mn_now; 3869 now_floor = mn_now;
… …
2211 else 3878 else
2212#endif 3879#endif
2213 { 3880 {
2214 ev_rt_now = ev_time (); 3881 ev_rt_now = ev_time ();
2215 3882
2216 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3883 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
2217 { 3884 {
2218 /* adjust timers. this is easy, as the offset is the same for all of them */ 3885 /* adjust timers. this is easy, as the offset is the same for all of them */
2219 timers_reschedule (EV_A_ ev_rt_now - mn_now); 3886 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2220#if EV_PERIODIC_ENABLE 3887#if EV_PERIODIC_ENABLE
2221 periodics_reschedule (EV_A); 3888 periodics_reschedule (EV_A);
… …
2224 3891
2225 mn_now = ev_rt_now; 3892 mn_now = ev_rt_now;
2226 } 3893 }
2227} 3894}
2228 3895
2229void 3896int
2230ev_loop (EV_P_ int flags) 3897ev_run (EV_P_ int flags)
2231{ 3898{
2232#if EV_MINIMAL < 2 3899#if EV_FEATURE_API
2233 ++loop_depth; 3900 ++loop_depth;
2234#endif 3901#endif
2235 3902
2236 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 3903 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2237 3904
2238 loop_done = EVUNLOOP_CANCEL; 3905 loop_done = EVBREAK_CANCEL;
2239 3906
2240 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 3907 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2241 3908
2242 do 3909 do
2243 { 3910 {
2244#if EV_VERIFY >= 2 3911#if EV_VERIFY >= 2
2245 ev_loop_verify (EV_A); 3912 ev_verify (EV_A);
2246#endif 3913#endif
2247 3914
2248#ifndef _WIN32 3915#ifndef _WIN32
2249 if (expect_false (curpid)) /* penalise the forking check even more */ 3916 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2250 if (expect_false (getpid () != curpid)) 3917 if (ecb_expect_false (getpid () != curpid))
2251 { 3918 {
2252 curpid = getpid (); 3919 curpid = getpid ();
2253 postfork = 1; 3920 postfork = 1;
2254 } 3921 }
2255#endif 3922#endif
2256 3923
2257#if EV_FORK_ENABLE 3924#if EV_FORK_ENABLE
2258 /* we might have forked, so queue fork handlers */ 3925 /* we might have forked, so queue fork handlers */
2259 if (expect_false (postfork)) 3926 if (ecb_expect_false (postfork))
2260 if (forkcnt) 3927 if (forkcnt)
2261 { 3928 {
2262 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3929 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2263 EV_INVOKE_PENDING; 3930 EV_INVOKE_PENDING;
2264 } 3931 }
2265#endif 3932#endif
2266 3933
3934#if EV_PREPARE_ENABLE
2267 /* queue prepare watchers (and execute them) */ 3935 /* queue prepare watchers (and execute them) */
2268 if (expect_false (preparecnt)) 3936 if (ecb_expect_false (preparecnt))
2269 { 3937 {
2270 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3938 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2271 EV_INVOKE_PENDING; 3939 EV_INVOKE_PENDING;
2272 } 3940 }
3941#endif
2273 3942
2274 if (expect_false (loop_done)) 3943 if (ecb_expect_false (loop_done))
2275 break; 3944 break;
2276 3945
2277 /* we might have forked, so reify kernel state if necessary */ 3946 /* we might have forked, so reify kernel state if necessary */
2278 if (expect_false (postfork)) 3947 if (ecb_expect_false (postfork))
2279 loop_fork (EV_A); 3948 loop_fork (EV_A);
2280 3949
2281 /* update fd-related kernel structures */ 3950 /* update fd-related kernel structures */
2282 fd_reify (EV_A); 3951 fd_reify (EV_A);
2283 3952
2284 /* calculate blocking time */ 3953 /* calculate blocking time */
2285 { 3954 {
2286 ev_tstamp waittime = 0.; 3955 ev_tstamp waittime = 0.;
2287 ev_tstamp sleeptime = 0.; 3956 ev_tstamp sleeptime = 0.;
2288 3957
3958 /* remember old timestamp for io_blocktime calculation */
3959 ev_tstamp prev_mn_now = mn_now;
3960
3961 /* update time to cancel out callback processing overhead */
3962 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
3963
3964 /* from now on, we want a pipe-wake-up */
3965 pipe_write_wanted = 1;
3966
3967 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3968
2289 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3969 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2290 { 3970 {
2291 /* remember old timestamp for io_blocktime calculation */
2292 ev_tstamp prev_mn_now = mn_now;
2293
2294 /* update time to cancel out callback processing overhead */
2295 time_update (EV_A_ 1e100);
2296
2297 waittime = MAX_BLOCKTIME; 3971 waittime = EV_TS_CONST (MAX_BLOCKTIME);
2298 3972
2299 if (timercnt) 3973 if (timercnt)
2300 { 3974 {
2301 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3975 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2302 if (waittime > to) waittime = to; 3976 if (waittime > to) waittime = to;
2303 } 3977 }
2304 3978
2305#if EV_PERIODIC_ENABLE 3979#if EV_PERIODIC_ENABLE
2306 if (periodiccnt) 3980 if (periodiccnt)
2307 { 3981 {
2308 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3982 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2309 if (waittime > to) waittime = to; 3983 if (waittime > to) waittime = to;
2310 } 3984 }
2311#endif 3985#endif
2312 3986
2313 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3987 /* don't let timeouts decrease the waittime below timeout_blocktime */
2314 if (expect_false (waittime < timeout_blocktime)) 3988 if (ecb_expect_false (waittime < timeout_blocktime))
2315 waittime = timeout_blocktime; 3989 waittime = timeout_blocktime;
2316 3990
3991 /* now there are two more special cases left, either we have
3992 * already-expired timers, so we should not sleep, or we have timers
3993 * that expire very soon, in which case we need to wait for a minimum
3994 * amount of time for some event loop backends.
3995 */
3996 if (ecb_expect_false (waittime < backend_mintime))
3997 waittime = waittime <= EV_TS_CONST (0.)
3998 ? EV_TS_CONST (0.)
3999 : backend_mintime;
4000
2317 /* extra check because io_blocktime is commonly 0 */ 4001 /* extra check because io_blocktime is commonly 0 */
2318 if (expect_false (io_blocktime)) 4002 if (ecb_expect_false (io_blocktime))
2319 { 4003 {
2320 sleeptime = io_blocktime - (mn_now - prev_mn_now); 4004 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2321 4005
2322 if (sleeptime > waittime - backend_fudge) 4006 if (sleeptime > waittime - backend_mintime)
2323 sleeptime = waittime - backend_fudge; 4007 sleeptime = waittime - backend_mintime;
2324 4008
2325 if (expect_true (sleeptime > 0.)) 4009 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2326 { 4010 {
2327 ev_sleep (sleeptime); 4011 ev_sleep (sleeptime);
2328 waittime -= sleeptime; 4012 waittime -= sleeptime;
2329 } 4013 }
2330 } 4014 }
2331 } 4015 }
2332 4016
2333#if EV_MINIMAL < 2 4017#if EV_FEATURE_API
2334 ++loop_count; 4018 ++loop_count;
2335#endif 4019#endif
2336 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 4020 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2337 backend_poll (EV_A_ waittime); 4021 backend_poll (EV_A_ waittime);
2338 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 4022 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
4023
4024 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
4025
4026 ECB_MEMORY_FENCE_ACQUIRE;
4027 if (pipe_write_skipped)
4028 {
4029 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
4030 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
4031 }
2339 4032
2340 /* update ev_rt_now, do magic */ 4033 /* update ev_rt_now, do magic */
2341 time_update (EV_A_ waittime + sleeptime); 4034 time_update (EV_A_ waittime + sleeptime);
2342 } 4035 }
2343 4036
… …
2350#if EV_IDLE_ENABLE 4043#if EV_IDLE_ENABLE
2351 /* queue idle watchers unless other events are pending */ 4044 /* queue idle watchers unless other events are pending */
2352 idle_reify (EV_A); 4045 idle_reify (EV_A);
2353#endif 4046#endif
2354 4047
4048#if EV_CHECK_ENABLE
2355 /* queue check watchers, to be executed first */ 4049 /* queue check watchers, to be executed first */
2356 if (expect_false (checkcnt)) 4050 if (ecb_expect_false (checkcnt))
2357 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 4051 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
4052#endif
2358 4053
2359 EV_INVOKE_PENDING; 4054 EV_INVOKE_PENDING;
2360 } 4055 }
2361 while (expect_true ( 4056 while (ecb_expect_true (
2362 activecnt 4057 activecnt
2363 && !loop_done 4058 && !loop_done
2364 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 4059 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2365 )); 4060 ));
2366 4061
2367 if (loop_done == EVUNLOOP_ONE) 4062 if (loop_done == EVBREAK_ONE)
2368 loop_done = EVUNLOOP_CANCEL; 4063 loop_done = EVBREAK_CANCEL;
2369 4064
2370#if EV_MINIMAL < 2 4065#if EV_FEATURE_API
2371 --loop_depth; 4066 --loop_depth;
2372#endif 4067#endif
2373}
2374 4068
4069 return activecnt;
4070}
4071
2375void 4072void
2376ev_unloop (EV_P_ int how) 4073ev_break (EV_P_ int how) EV_NOEXCEPT
2377{ 4074{
2378 loop_done = how; 4075 loop_done = how;
2379} 4076}
2380 4077
2381void 4078void
2382ev_ref (EV_P) 4079ev_ref (EV_P) EV_NOEXCEPT
2383{ 4080{
2384 ++activecnt; 4081 ++activecnt;
2385} 4082}
2386 4083
2387void 4084void
2388ev_unref (EV_P) 4085ev_unref (EV_P) EV_NOEXCEPT
2389{ 4086{
2390 --activecnt; 4087 --activecnt;
2391} 4088}
2392 4089
2393void 4090void
2394ev_now_update (EV_P) 4091ev_now_update (EV_P) EV_NOEXCEPT
2395{ 4092{
2396 time_update (EV_A_ 1e100); 4093 time_update (EV_A_ EV_TSTAMP_HUGE);
2397} 4094}
2398 4095
2399void 4096void
2400ev_suspend (EV_P) 4097ev_suspend (EV_P) EV_NOEXCEPT
2401{ 4098{
2402 ev_now_update (EV_A); 4099 ev_now_update (EV_A);
2403} 4100}
2404 4101
2405void 4102void
2406ev_resume (EV_P) 4103ev_resume (EV_P) EV_NOEXCEPT
2407{ 4104{
2408 ev_tstamp mn_prev = mn_now; 4105 ev_tstamp mn_prev = mn_now;
2409 4106
2410 ev_now_update (EV_A); 4107 ev_now_update (EV_A);
2411 timers_reschedule (EV_A_ mn_now - mn_prev); 4108 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2428inline_size void 4125inline_size void
2429wlist_del (WL *head, WL elem) 4126wlist_del (WL *head, WL elem)
2430{ 4127{
2431 while (*head) 4128 while (*head)
2432 { 4129 {
2433 if (expect_true (*head == elem)) 4130 if (ecb_expect_true (*head == elem))
2434 { 4131 {
2435 *head = elem->next; 4132 *head = elem->next;
2436 break; 4133 break;
2437 } 4134 }
2438 4135
… …
2450 w->pending = 0; 4147 w->pending = 0;
2451 } 4148 }
2452} 4149}
2453 4150
2454int 4151int
2455ev_clear_pending (EV_P_ void *w) 4152ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2456{ 4153{
2457 W w_ = (W)w; 4154 W w_ = (W)w;
2458 int pending = w_->pending; 4155 int pending = w_->pending;
2459 4156
2460 if (expect_true (pending)) 4157 if (ecb_expect_true (pending))
2461 { 4158 {
2462 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4159 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2463 p->w = (W)&pending_w; 4160 p->w = (W)&pending_w;
2464 w_->pending = 0; 4161 w_->pending = 0;
2465 return p->events; 4162 return p->events;
… …
2492 w->active = 0; 4189 w->active = 0;
2493} 4190}
2494 4191
2495/*****************************************************************************/ 4192/*****************************************************************************/
2496 4193
2497void noinline 4194ecb_noinline
4195void
2498ev_io_start (EV_P_ ev_io *w) 4196ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2499{ 4197{
2500 int fd = w->fd; 4198 int fd = w->fd;
2501 4199
2502 if (expect_false (ev_is_active (w))) 4200 if (ecb_expect_false (ev_is_active (w)))
2503 return; 4201 return;
2504 4202
2505 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4203 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2506 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4204 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2507 4205
4206#if EV_VERIFY >= 2
4207 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4208#endif
2508 EV_FREQUENT_CHECK; 4209 EV_FREQUENT_CHECK;
2509 4210
2510 ev_start (EV_A_ (W)w, 1); 4211 ev_start (EV_A_ (W)w, 1);
2511 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4212 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2512 wlist_add (&anfds[fd].head, (WL)w); 4213 wlist_add (&anfds[fd].head, (WL)w);
4214
4215 /* common bug, apparently */
4216 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2513 4217
2514 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 4218 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2515 w->events &= ~EV__IOFDSET; 4219 w->events &= ~EV__IOFDSET;
2516 4220
2517 EV_FREQUENT_CHECK; 4221 EV_FREQUENT_CHECK;
2518} 4222}
2519 4223
2520void noinline 4224ecb_noinline
4225void
2521ev_io_stop (EV_P_ ev_io *w) 4226ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2522{ 4227{
2523 clear_pending (EV_A_ (W)w); 4228 clear_pending (EV_A_ (W)w);
2524 if (expect_false (!ev_is_active (w))) 4229 if (ecb_expect_false (!ev_is_active (w)))
2525 return; 4230 return;
2526 4231
2527 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4232 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2528 4233
4234#if EV_VERIFY >= 2
4235 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4236#endif
2529 EV_FREQUENT_CHECK; 4237 EV_FREQUENT_CHECK;
2530 4238
2531 wlist_del (&anfds[w->fd].head, (WL)w); 4239 wlist_del (&anfds[w->fd].head, (WL)w);
2532 ev_stop (EV_A_ (W)w); 4240 ev_stop (EV_A_ (W)w);
2533 4241
2534 fd_change (EV_A_ w->fd, 1); 4242 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2535 4243
2536 EV_FREQUENT_CHECK; 4244 EV_FREQUENT_CHECK;
2537} 4245}
2538 4246
2539void noinline 4247ecb_noinline
4248void
2540ev_timer_start (EV_P_ ev_timer *w) 4249ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2541{ 4250{
2542 if (expect_false (ev_is_active (w))) 4251 if (ecb_expect_false (ev_is_active (w)))
2543 return; 4252 return;
2544 4253
2545 ev_at (w) += mn_now; 4254 ev_at (w) += mn_now;
2546 4255
2547 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4256 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2548 4257
2549 EV_FREQUENT_CHECK; 4258 EV_FREQUENT_CHECK;
2550 4259
2551 ++timercnt; 4260 ++timercnt;
2552 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4261 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2553 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4262 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2554 ANHE_w (timers [ev_active (w)]) = (WT)w; 4263 ANHE_w (timers [ev_active (w)]) = (WT)w;
2555 ANHE_at_cache (timers [ev_active (w)]); 4264 ANHE_at_cache (timers [ev_active (w)]);
2556 upheap (timers, ev_active (w)); 4265 upheap (timers, ev_active (w));
2557 4266
2558 EV_FREQUENT_CHECK; 4267 EV_FREQUENT_CHECK;
2559 4268
2560 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4269 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2561} 4270}
2562 4271
2563void noinline 4272ecb_noinline
4273void
2564ev_timer_stop (EV_P_ ev_timer *w) 4274ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2565{ 4275{
2566 clear_pending (EV_A_ (W)w); 4276 clear_pending (EV_A_ (W)w);
2567 if (expect_false (!ev_is_active (w))) 4277 if (ecb_expect_false (!ev_is_active (w)))
2568 return; 4278 return;
2569 4279
2570 EV_FREQUENT_CHECK; 4280 EV_FREQUENT_CHECK;
2571 4281
2572 { 4282 {
… …
2574 4284
2575 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4285 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2576 4286
2577 --timercnt; 4287 --timercnt;
2578 4288
2579 if (expect_true (active < timercnt + HEAP0)) 4289 if (ecb_expect_true (active < timercnt + HEAP0))
2580 { 4290 {
2581 timers [active] = timers [timercnt + HEAP0]; 4291 timers [active] = timers [timercnt + HEAP0];
2582 adjustheap (timers, timercnt, active); 4292 adjustheap (timers, timercnt, active);
2583 } 4293 }
2584 } 4294 }
2585 4295
4296 ev_at (w) -= mn_now;
4297
4298 ev_stop (EV_A_ (W)w);
4299
2586 EV_FREQUENT_CHECK; 4300 EV_FREQUENT_CHECK;
2587
2588 ev_at (w) -= mn_now;
2589
2590 ev_stop (EV_A_ (W)w);
2591} 4301}
2592 4302
2593void noinline 4303ecb_noinline
4304void
2594ev_timer_again (EV_P_ ev_timer *w) 4305ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2595{ 4306{
2596 EV_FREQUENT_CHECK; 4307 EV_FREQUENT_CHECK;
4308
4309 clear_pending (EV_A_ (W)w);
2597 4310
2598 if (ev_is_active (w)) 4311 if (ev_is_active (w))
2599 { 4312 {
2600 if (w->repeat) 4313 if (w->repeat)
2601 { 4314 {
… …
2614 4327
2615 EV_FREQUENT_CHECK; 4328 EV_FREQUENT_CHECK;
2616} 4329}
2617 4330
2618ev_tstamp 4331ev_tstamp
2619ev_timer_remaining (EV_P_ ev_timer *w) 4332ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2620{ 4333{
2621 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4334 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
2622} 4335}
2623 4336
2624#if EV_PERIODIC_ENABLE 4337#if EV_PERIODIC_ENABLE
2625void noinline 4338ecb_noinline
4339void
2626ev_periodic_start (EV_P_ ev_periodic *w) 4340ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2627{ 4341{
2628 if (expect_false (ev_is_active (w))) 4342 if (ecb_expect_false (ev_is_active (w)))
2629 return; 4343 return;
4344
4345#if EV_USE_TIMERFD
4346 if (timerfd == -2)
4347 evtimerfd_init (EV_A);
4348#endif
2630 4349
2631 if (w->reschedule_cb) 4350 if (w->reschedule_cb)
2632 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4351 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2633 else if (w->interval) 4352 else if (w->interval)
2634 { 4353 {
2635 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4354 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2636 /* this formula differs from the one in periodic_reify because we do not always round up */ 4355 periodic_recalc (EV_A_ w);
2637 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2638 } 4356 }
2639 else 4357 else
2640 ev_at (w) = w->offset; 4358 ev_at (w) = w->offset;
2641 4359
2642 EV_FREQUENT_CHECK; 4360 EV_FREQUENT_CHECK;
2643 4361
2644 ++periodiccnt; 4362 ++periodiccnt;
2645 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4363 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2646 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4364 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2647 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4365 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2648 ANHE_at_cache (periodics [ev_active (w)]); 4366 ANHE_at_cache (periodics [ev_active (w)]);
2649 upheap (periodics, ev_active (w)); 4367 upheap (periodics, ev_active (w));
2650 4368
2651 EV_FREQUENT_CHECK; 4369 EV_FREQUENT_CHECK;
2652 4370
2653 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4371 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2654} 4372}
2655 4373
2656void noinline 4374ecb_noinline
4375void
2657ev_periodic_stop (EV_P_ ev_periodic *w) 4376ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2658{ 4377{
2659 clear_pending (EV_A_ (W)w); 4378 clear_pending (EV_A_ (W)w);
2660 if (expect_false (!ev_is_active (w))) 4379 if (ecb_expect_false (!ev_is_active (w)))
2661 return; 4380 return;
2662 4381
2663 EV_FREQUENT_CHECK; 4382 EV_FREQUENT_CHECK;
2664 4383
2665 { 4384 {
… …
2667 4386
2668 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4387 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2669 4388
2670 --periodiccnt; 4389 --periodiccnt;
2671 4390
2672 if (expect_true (active < periodiccnt + HEAP0)) 4391 if (ecb_expect_true (active < periodiccnt + HEAP0))
2673 { 4392 {
2674 periodics [active] = periodics [periodiccnt + HEAP0]; 4393 periodics [active] = periodics [periodiccnt + HEAP0];
2675 adjustheap (periodics, periodiccnt, active); 4394 adjustheap (periodics, periodiccnt, active);
2676 } 4395 }
2677 } 4396 }
2678 4397
4398 ev_stop (EV_A_ (W)w);
4399
2679 EV_FREQUENT_CHECK; 4400 EV_FREQUENT_CHECK;
2680
2681 ev_stop (EV_A_ (W)w);
2682} 4401}
2683 4402
2684void noinline 4403ecb_noinline
4404void
2685ev_periodic_again (EV_P_ ev_periodic *w) 4405ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2686{ 4406{
2687 /* TODO: use adjustheap and recalculation */ 4407 /* TODO: use adjustheap and recalculation */
2688 ev_periodic_stop (EV_A_ w); 4408 ev_periodic_stop (EV_A_ w);
2689 ev_periodic_start (EV_A_ w); 4409 ev_periodic_start (EV_A_ w);
2690} 4410}
… …
2692 4412
2693#ifndef SA_RESTART 4413#ifndef SA_RESTART
2694# define SA_RESTART 0 4414# define SA_RESTART 0
2695#endif 4415#endif
2696 4416
2697void noinline 4417#if EV_SIGNAL_ENABLE
4418
4419ecb_noinline
4420void
2698ev_signal_start (EV_P_ ev_signal *w) 4421ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2699{ 4422{
2700 if (expect_false (ev_is_active (w))) 4423 if (ecb_expect_false (ev_is_active (w)))
2701 return; 4424 return;
2702 4425
2703 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4426 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2704 4427
2705#if EV_MULTIPLICITY 4428#if EV_MULTIPLICITY
2706 assert (("libev: a signal must not be attached to two different loops", 4429 assert (("libev: a signal must not be attached to two different loops",
2707 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4430 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2708 4431
2709 signals [w->signum - 1].loop = EV_A; 4432 signals [w->signum - 1].loop = EV_A;
4433 ECB_MEMORY_FENCE_RELEASE;
2710#endif 4434#endif
2711 4435
2712 EV_FREQUENT_CHECK; 4436 EV_FREQUENT_CHECK;
2713 4437
2714#if EV_USE_SIGNALFD 4438#if EV_USE_SIGNALFD
… …
2761 sa.sa_handler = ev_sighandler; 4485 sa.sa_handler = ev_sighandler;
2762 sigfillset (&sa.sa_mask); 4486 sigfillset (&sa.sa_mask);
2763 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4487 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2764 sigaction (w->signum, &sa, 0); 4488 sigaction (w->signum, &sa, 0);
2765 4489
4490 if (origflags & EVFLAG_NOSIGMASK)
4491 {
2766 sigemptyset (&sa.sa_mask); 4492 sigemptyset (&sa.sa_mask);
2767 sigaddset (&sa.sa_mask, w->signum); 4493 sigaddset (&sa.sa_mask, w->signum);
2768 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4494 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4495 }
2769#endif 4496#endif
2770 } 4497 }
2771 4498
2772 EV_FREQUENT_CHECK; 4499 EV_FREQUENT_CHECK;
2773} 4500}
2774 4501
2775void noinline 4502ecb_noinline
4503void
2776ev_signal_stop (EV_P_ ev_signal *w) 4504ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2777{ 4505{
2778 clear_pending (EV_A_ (W)w); 4506 clear_pending (EV_A_ (W)w);
2779 if (expect_false (!ev_is_active (w))) 4507 if (ecb_expect_false (!ev_is_active (w)))
2780 return; 4508 return;
2781 4509
2782 EV_FREQUENT_CHECK; 4510 EV_FREQUENT_CHECK;
2783 4511
2784 wlist_del (&signals [w->signum - 1].head, (WL)w); 4512 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
2807 } 4535 }
2808 4536
2809 EV_FREQUENT_CHECK; 4537 EV_FREQUENT_CHECK;
2810} 4538}
2811 4539
4540#endif
4541
4542#if EV_CHILD_ENABLE
4543
2812void 4544void
2813ev_child_start (EV_P_ ev_child *w) 4545ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2814{ 4546{
2815#if EV_MULTIPLICITY 4547#if EV_MULTIPLICITY
2816 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4548 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2817#endif 4549#endif
2818 if (expect_false (ev_is_active (w))) 4550 if (ecb_expect_false (ev_is_active (w)))
2819 return; 4551 return;
2820 4552
2821 EV_FREQUENT_CHECK; 4553 EV_FREQUENT_CHECK;
2822 4554
2823 ev_start (EV_A_ (W)w, 1); 4555 ev_start (EV_A_ (W)w, 1);
2824 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4556 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2825 4557
2826 EV_FREQUENT_CHECK; 4558 EV_FREQUENT_CHECK;
2827} 4559}
2828 4560
2829void 4561void
2830ev_child_stop (EV_P_ ev_child *w) 4562ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2831{ 4563{
2832 clear_pending (EV_A_ (W)w); 4564 clear_pending (EV_A_ (W)w);
2833 if (expect_false (!ev_is_active (w))) 4565 if (ecb_expect_false (!ev_is_active (w)))
2834 return; 4566 return;
2835 4567
2836 EV_FREQUENT_CHECK; 4568 EV_FREQUENT_CHECK;
2837 4569
2838 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4570 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2839 ev_stop (EV_A_ (W)w); 4571 ev_stop (EV_A_ (W)w);
2840 4572
2841 EV_FREQUENT_CHECK; 4573 EV_FREQUENT_CHECK;
2842} 4574}
4575
4576#endif
2843 4577
2844#if EV_STAT_ENABLE 4578#if EV_STAT_ENABLE
2845 4579
2846# ifdef _WIN32 4580# ifdef _WIN32
2847# undef lstat 4581# undef lstat
… …
2850 4584
2851#define DEF_STAT_INTERVAL 5.0074891 4585#define DEF_STAT_INTERVAL 5.0074891
2852#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4586#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2853#define MIN_STAT_INTERVAL 0.1074891 4587#define MIN_STAT_INTERVAL 0.1074891
2854 4588
2855static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4589ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2856 4590
2857#if EV_USE_INOTIFY 4591#if EV_USE_INOTIFY
2858# define EV_INOTIFY_BUFSIZE 8192
2859 4592
2860static void noinline 4593/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4594# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4595
4596ecb_noinline
4597static void
2861infy_add (EV_P_ ev_stat *w) 4598infy_add (EV_P_ ev_stat *w)
2862{ 4599{
2863 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); 4600 w->wd = inotify_add_watch (fs_fd, w->path,
4601 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4602 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4603 | IN_DONT_FOLLOW | IN_MASK_ADD);
2864 4604
2865 if (w->wd >= 0) 4605 if (w->wd >= 0)
2866 { 4606 {
2867 struct statfs sfs; 4607 struct statfs sfs;
2868 4608
… …
2872 4612
2873 if (!fs_2625) 4613 if (!fs_2625)
2874 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4614 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2875 else if (!statfs (w->path, &sfs) 4615 else if (!statfs (w->path, &sfs)
2876 && (sfs.f_type == 0x1373 /* devfs */ 4616 && (sfs.f_type == 0x1373 /* devfs */
4617 || sfs.f_type == 0x4006 /* fat */
4618 || sfs.f_type == 0x4d44 /* msdos */
2877 || sfs.f_type == 0xEF53 /* ext2/3 */ 4619 || sfs.f_type == 0xEF53 /* ext2/3 */
4620 || sfs.f_type == 0x72b6 /* jffs2 */
4621 || sfs.f_type == 0x858458f6 /* ramfs */
4622 || sfs.f_type == 0x5346544e /* ntfs */
2878 || sfs.f_type == 0x3153464a /* jfs */ 4623 || sfs.f_type == 0x3153464a /* jfs */
4624 || sfs.f_type == 0x9123683e /* btrfs */
2879 || sfs.f_type == 0x52654973 /* reiser3 */ 4625 || sfs.f_type == 0x52654973 /* reiser3 */
2880 || sfs.f_type == 0x01021994 /* tempfs */ 4626 || sfs.f_type == 0x01021994 /* tmpfs */
2881 || sfs.f_type == 0x58465342 /* xfs */)) 4627 || sfs.f_type == 0x58465342 /* xfs */))
2882 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4628 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2883 else 4629 else
2884 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4630 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2885 } 4631 }
… …
2906 if (!pend || pend == path) 4652 if (!pend || pend == path)
2907 break; 4653 break;
2908 4654
2909 *pend = 0; 4655 *pend = 0;
2910 w->wd = inotify_add_watch (fs_fd, path, mask); 4656 w->wd = inotify_add_watch (fs_fd, path, mask);
2911 } 4657 }
2912 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4658 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2913 } 4659 }
2914 } 4660 }
2915 4661
2916 if (w->wd >= 0) 4662 if (w->wd >= 0)
2917 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4663 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2918 4664
2919 /* now re-arm timer, if required */ 4665 /* now re-arm timer, if required */
2920 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4666 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2921 ev_timer_again (EV_A_ &w->timer); 4667 ev_timer_again (EV_A_ &w->timer);
2922 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4668 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2923} 4669}
2924 4670
2925static void noinline 4671ecb_noinline
4672static void
2926infy_del (EV_P_ ev_stat *w) 4673infy_del (EV_P_ ev_stat *w)
2927{ 4674{
2928 int slot; 4675 int slot;
2929 int wd = w->wd; 4676 int wd = w->wd;
2930 4677
2931 if (wd < 0) 4678 if (wd < 0)
2932 return; 4679 return;
2933 4680
2934 w->wd = -2; 4681 w->wd = -2;
2935 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4682 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2936 wlist_del (&fs_hash [slot].head, (WL)w); 4683 wlist_del (&fs_hash [slot].head, (WL)w);
2937 4684
2938 /* remove this watcher, if others are watching it, they will rearm */ 4685 /* remove this watcher, if others are watching it, they will rearm */
2939 inotify_rm_watch (fs_fd, wd); 4686 inotify_rm_watch (fs_fd, wd);
2940} 4687}
2941 4688
2942static void noinline 4689ecb_noinline
4690static void
2943infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4691infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2944{ 4692{
2945 if (slot < 0) 4693 if (slot < 0)
2946 /* overflow, need to check for all hash slots */ 4694 /* overflow, need to check for all hash slots */
2947 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4695 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2948 infy_wd (EV_A_ slot, wd, ev); 4696 infy_wd (EV_A_ slot, wd, ev);
2949 else 4697 else
2950 { 4698 {
2951 WL w_; 4699 WL w_;
2952 4700
2953 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4701 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2954 { 4702 {
2955 ev_stat *w = (ev_stat *)w_; 4703 ev_stat *w = (ev_stat *)w_;
2956 w_ = w_->next; /* lets us remove this watcher and all before it */ 4704 w_ = w_->next; /* lets us remove this watcher and all before it */
2957 4705
2958 if (w->wd == wd || wd == -1) 4706 if (w->wd == wd || wd == -1)
2959 { 4707 {
2960 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4708 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2961 { 4709 {
2962 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4710 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2963 w->wd = -1; 4711 w->wd = -1;
2964 infy_add (EV_A_ w); /* re-add, no matter what */ 4712 infy_add (EV_A_ w); /* re-add, no matter what */
2965 } 4713 }
2966 4714
2967 stat_timer_cb (EV_A_ &w->timer, 0); 4715 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2972 4720
2973static void 4721static void
2974infy_cb (EV_P_ ev_io *w, int revents) 4722infy_cb (EV_P_ ev_io *w, int revents)
2975{ 4723{
2976 char buf [EV_INOTIFY_BUFSIZE]; 4724 char buf [EV_INOTIFY_BUFSIZE];
2977 struct inotify_event *ev = (struct inotify_event *)buf;
2978 int ofs; 4725 int ofs;
2979 int len = read (fs_fd, buf, sizeof (buf)); 4726 int len = read (fs_fd, buf, sizeof (buf));
2980 4727
2981 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4728 for (ofs = 0; ofs < len; )
4729 {
4730 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2982 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4731 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4732 ofs += sizeof (struct inotify_event) + ev->len;
4733 }
2983} 4734}
2984 4735
2985inline_size void 4736inline_size ecb_cold
4737void
2986check_2625 (EV_P) 4738ev_check_2625 (EV_P)
2987{ 4739{
2988 /* kernels < 2.6.25 are borked 4740 /* kernels < 2.6.25 are borked
2989 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4741 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2990 */ 4742 */
2991 struct utsname buf; 4743 if (ev_linux_version () < 0x020619)
2992 int major, minor, micro;
2993
2994 if (uname (&buf))
2995 return;
2996
2997 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2998 return;
2999
3000 if (major < 2
3001 || (major == 2 && minor < 6)
3002 || (major == 2 && minor == 6 && micro < 25))
3003 return; 4744 return;
3004 4745
3005 fs_2625 = 1; 4746 fs_2625 = 1;
3006} 4747}
3007 4748
3008inline_size int 4749inline_size int
3009infy_newfd (void) 4750infy_newfd (void)
3010{ 4751{
3011#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4752#if defined IN_CLOEXEC && defined IN_NONBLOCK
3012 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4753 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3013 if (fd >= 0) 4754 if (fd >= 0)
3014 return fd; 4755 return fd;
3015#endif 4756#endif
3016 return inotify_init (); 4757 return inotify_init ();
… …
3022 if (fs_fd != -2) 4763 if (fs_fd != -2)
3023 return; 4764 return;
3024 4765
3025 fs_fd = -1; 4766 fs_fd = -1;
3026 4767
3027 check_2625 (EV_A); 4768 ev_check_2625 (EV_A);
3028 4769
3029 fs_fd = infy_newfd (); 4770 fs_fd = infy_newfd ();
3030 4771
3031 if (fs_fd >= 0) 4772 if (fs_fd >= 0)
3032 { 4773 {
… …
3057 ev_io_set (&fs_w, fs_fd, EV_READ); 4798 ev_io_set (&fs_w, fs_fd, EV_READ);
3058 ev_io_start (EV_A_ &fs_w); 4799 ev_io_start (EV_A_ &fs_w);
3059 ev_unref (EV_A); 4800 ev_unref (EV_A);
3060 } 4801 }
3061 4802
3062 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4803 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3063 { 4804 {
3064 WL w_ = fs_hash [slot].head; 4805 WL w_ = fs_hash [slot].head;
3065 fs_hash [slot].head = 0; 4806 fs_hash [slot].head = 0;
3066 4807
3067 while (w_) 4808 while (w_)
… …
3091#else 4832#else
3092# define EV_LSTAT(p,b) lstat (p, b) 4833# define EV_LSTAT(p,b) lstat (p, b)
3093#endif 4834#endif
3094 4835
3095void 4836void
3096ev_stat_stat (EV_P_ ev_stat *w) 4837ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3097{ 4838{
3098 if (lstat (w->path, &w->attr) < 0) 4839 if (lstat (w->path, &w->attr) < 0)
3099 w->attr.st_nlink = 0; 4840 w->attr.st_nlink = 0;
3100 else if (!w->attr.st_nlink) 4841 else if (!w->attr.st_nlink)
3101 w->attr.st_nlink = 1; 4842 w->attr.st_nlink = 1;
3102} 4843}
3103 4844
3104static void noinline 4845ecb_noinline
4846static void
3105stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4847stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3106{ 4848{
3107 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4849 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3108 4850
3109 ev_statdata prev = w->attr; 4851 ev_statdata prev = w->attr;
… …
3140 ev_feed_event (EV_A_ w, EV_STAT); 4882 ev_feed_event (EV_A_ w, EV_STAT);
3141 } 4883 }
3142} 4884}
3143 4885
3144void 4886void
3145ev_stat_start (EV_P_ ev_stat *w) 4887ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3146{ 4888{
3147 if (expect_false (ev_is_active (w))) 4889 if (ecb_expect_false (ev_is_active (w)))
3148 return; 4890 return;
3149 4891
3150 ev_stat_stat (EV_A_ w); 4892 ev_stat_stat (EV_A_ w);
3151 4893
3152 if (w->interval < MIN_STAT_INTERVAL && w->interval) 4894 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3171 4913
3172 EV_FREQUENT_CHECK; 4914 EV_FREQUENT_CHECK;
3173} 4915}
3174 4916
3175void 4917void
3176ev_stat_stop (EV_P_ ev_stat *w) 4918ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3177{ 4919{
3178 clear_pending (EV_A_ (W)w); 4920 clear_pending (EV_A_ (W)w);
3179 if (expect_false (!ev_is_active (w))) 4921 if (ecb_expect_false (!ev_is_active (w)))
3180 return; 4922 return;
3181 4923
3182 EV_FREQUENT_CHECK; 4924 EV_FREQUENT_CHECK;
3183 4925
3184#if EV_USE_INOTIFY 4926#if EV_USE_INOTIFY
… …
3197} 4939}
3198#endif 4940#endif
3199 4941
3200#if EV_IDLE_ENABLE 4942#if EV_IDLE_ENABLE
3201void 4943void
3202ev_idle_start (EV_P_ ev_idle *w) 4944ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3203{ 4945{
3204 if (expect_false (ev_is_active (w))) 4946 if (ecb_expect_false (ev_is_active (w)))
3205 return; 4947 return;
3206 4948
3207 pri_adjust (EV_A_ (W)w); 4949 pri_adjust (EV_A_ (W)w);
3208 4950
3209 EV_FREQUENT_CHECK; 4951 EV_FREQUENT_CHECK;
… …
3212 int active = ++idlecnt [ABSPRI (w)]; 4954 int active = ++idlecnt [ABSPRI (w)];
3213 4955
3214 ++idleall; 4956 ++idleall;
3215 ev_start (EV_A_ (W)w, active); 4957 ev_start (EV_A_ (W)w, active);
3216 4958
3217 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4959 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3218 idles [ABSPRI (w)][active - 1] = w; 4960 idles [ABSPRI (w)][active - 1] = w;
3219 } 4961 }
3220 4962
3221 EV_FREQUENT_CHECK; 4963 EV_FREQUENT_CHECK;
3222} 4964}
3223 4965
3224void 4966void
3225ev_idle_stop (EV_P_ ev_idle *w) 4967ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3226{ 4968{
3227 clear_pending (EV_A_ (W)w); 4969 clear_pending (EV_A_ (W)w);
3228 if (expect_false (!ev_is_active (w))) 4970 if (ecb_expect_false (!ev_is_active (w)))
3229 return; 4971 return;
3230 4972
3231 EV_FREQUENT_CHECK; 4973 EV_FREQUENT_CHECK;
3232 4974
3233 { 4975 {
… …
3242 4984
3243 EV_FREQUENT_CHECK; 4985 EV_FREQUENT_CHECK;
3244} 4986}
3245#endif 4987#endif
3246 4988
4989#if EV_PREPARE_ENABLE
3247void 4990void
3248ev_prepare_start (EV_P_ ev_prepare *w) 4991ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3249{ 4992{
3250 if (expect_false (ev_is_active (w))) 4993 if (ecb_expect_false (ev_is_active (w)))
3251 return; 4994 return;
3252 4995
3253 EV_FREQUENT_CHECK; 4996 EV_FREQUENT_CHECK;
3254 4997
3255 ev_start (EV_A_ (W)w, ++preparecnt); 4998 ev_start (EV_A_ (W)w, ++preparecnt);
3256 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4999 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3257 prepares [preparecnt - 1] = w; 5000 prepares [preparecnt - 1] = w;
3258 5001
3259 EV_FREQUENT_CHECK; 5002 EV_FREQUENT_CHECK;
3260} 5003}
3261 5004
3262void 5005void
3263ev_prepare_stop (EV_P_ ev_prepare *w) 5006ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3264{ 5007{
3265 clear_pending (EV_A_ (W)w); 5008 clear_pending (EV_A_ (W)w);
3266 if (expect_false (!ev_is_active (w))) 5009 if (ecb_expect_false (!ev_is_active (w)))
3267 return; 5010 return;
3268 5011
3269 EV_FREQUENT_CHECK; 5012 EV_FREQUENT_CHECK;
3270 5013
3271 { 5014 {
… …
3277 5020
3278 ev_stop (EV_A_ (W)w); 5021 ev_stop (EV_A_ (W)w);
3279 5022
3280 EV_FREQUENT_CHECK; 5023 EV_FREQUENT_CHECK;
3281} 5024}
5025#endif
3282 5026
5027#if EV_CHECK_ENABLE
3283void 5028void
3284ev_check_start (EV_P_ ev_check *w) 5029ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3285{ 5030{
3286 if (expect_false (ev_is_active (w))) 5031 if (ecb_expect_false (ev_is_active (w)))
3287 return; 5032 return;
3288 5033
3289 EV_FREQUENT_CHECK; 5034 EV_FREQUENT_CHECK;
3290 5035
3291 ev_start (EV_A_ (W)w, ++checkcnt); 5036 ev_start (EV_A_ (W)w, ++checkcnt);
3292 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 5037 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3293 checks [checkcnt - 1] = w; 5038 checks [checkcnt - 1] = w;
3294 5039
3295 EV_FREQUENT_CHECK; 5040 EV_FREQUENT_CHECK;
3296} 5041}
3297 5042
3298void 5043void
3299ev_check_stop (EV_P_ ev_check *w) 5044ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3300{ 5045{
3301 clear_pending (EV_A_ (W)w); 5046 clear_pending (EV_A_ (W)w);
3302 if (expect_false (!ev_is_active (w))) 5047 if (ecb_expect_false (!ev_is_active (w)))
3303 return; 5048 return;
3304 5049
3305 EV_FREQUENT_CHECK; 5050 EV_FREQUENT_CHECK;
3306 5051
3307 { 5052 {
… …
3313 5058
3314 ev_stop (EV_A_ (W)w); 5059 ev_stop (EV_A_ (W)w);
3315 5060
3316 EV_FREQUENT_CHECK; 5061 EV_FREQUENT_CHECK;
3317} 5062}
5063#endif
3318 5064
3319#if EV_EMBED_ENABLE 5065#if EV_EMBED_ENABLE
3320void noinline 5066ecb_noinline
5067void
3321ev_embed_sweep (EV_P_ ev_embed *w) 5068ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3322{ 5069{
3323 ev_loop (w->other, EVLOOP_NONBLOCK); 5070 ev_run (w->other, EVRUN_NOWAIT);
3324} 5071}
3325 5072
3326static void 5073static void
3327embed_io_cb (EV_P_ ev_io *io, int revents) 5074embed_io_cb (EV_P_ ev_io *io, int revents)
3328{ 5075{
3329 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 5076 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3330 5077
3331 if (ev_cb (w)) 5078 if (ev_cb (w))
3332 ev_feed_event (EV_A_ (W)w, EV_EMBED); 5079 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3333 else 5080 else
3334 ev_loop (w->other, EVLOOP_NONBLOCK); 5081 ev_run (w->other, EVRUN_NOWAIT);
3335} 5082}
3336 5083
3337static void 5084static void
3338embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 5085embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3339{ 5086{
… …
3343 EV_P = w->other; 5090 EV_P = w->other;
3344 5091
3345 while (fdchangecnt) 5092 while (fdchangecnt)
3346 { 5093 {
3347 fd_reify (EV_A); 5094 fd_reify (EV_A);
3348 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5095 ev_run (EV_A_ EVRUN_NOWAIT);
3349 } 5096 }
3350 } 5097 }
3351} 5098}
3352 5099
5100#if EV_FORK_ENABLE
3353static void 5101static void
3354embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5102embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3355{ 5103{
3356 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 5104 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3357 5105
… …
3359 5107
3360 { 5108 {
3361 EV_P = w->other; 5109 EV_P = w->other;
3362 5110
3363 ev_loop_fork (EV_A); 5111 ev_loop_fork (EV_A);
3364 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5112 ev_run (EV_A_ EVRUN_NOWAIT);
3365 } 5113 }
3366 5114
3367 ev_embed_start (EV_A_ w); 5115 ev_embed_start (EV_A_ w);
3368} 5116}
5117#endif
3369 5118
3370#if 0 5119#if 0
3371static void 5120static void
3372embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5121embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3373{ 5122{
3374 ev_idle_stop (EV_A_ idle); 5123 ev_idle_stop (EV_A_ idle);
3375} 5124}
3376#endif 5125#endif
3377 5126
3378void 5127void
3379ev_embed_start (EV_P_ ev_embed *w) 5128ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3380{ 5129{
3381 if (expect_false (ev_is_active (w))) 5130 if (ecb_expect_false (ev_is_active (w)))
3382 return; 5131 return;
3383 5132
3384 { 5133 {
3385 EV_P = w->other; 5134 EV_P = w->other;
3386 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 5135 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
… …
3394 5143
3395 ev_prepare_init (&w->prepare, embed_prepare_cb); 5144 ev_prepare_init (&w->prepare, embed_prepare_cb);
3396 ev_set_priority (&w->prepare, EV_MINPRI); 5145 ev_set_priority (&w->prepare, EV_MINPRI);
3397 ev_prepare_start (EV_A_ &w->prepare); 5146 ev_prepare_start (EV_A_ &w->prepare);
3398 5147
5148#if EV_FORK_ENABLE
3399 ev_fork_init (&w->fork, embed_fork_cb); 5149 ev_fork_init (&w->fork, embed_fork_cb);
3400 ev_fork_start (EV_A_ &w->fork); 5150 ev_fork_start (EV_A_ &w->fork);
5151#endif
3401 5152
3402 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5153 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3403 5154
3404 ev_start (EV_A_ (W)w, 1); 5155 ev_start (EV_A_ (W)w, 1);
3405 5156
3406 EV_FREQUENT_CHECK; 5157 EV_FREQUENT_CHECK;
3407} 5158}
3408 5159
3409void 5160void
3410ev_embed_stop (EV_P_ ev_embed *w) 5161ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3411{ 5162{
3412 clear_pending (EV_A_ (W)w); 5163 clear_pending (EV_A_ (W)w);
3413 if (expect_false (!ev_is_active (w))) 5164 if (ecb_expect_false (!ev_is_active (w)))
3414 return; 5165 return;
3415 5166
3416 EV_FREQUENT_CHECK; 5167 EV_FREQUENT_CHECK;
3417 5168
3418 ev_io_stop (EV_A_ &w->io); 5169 ev_io_stop (EV_A_ &w->io);
3419 ev_prepare_stop (EV_A_ &w->prepare); 5170 ev_prepare_stop (EV_A_ &w->prepare);
5171#if EV_FORK_ENABLE
3420 ev_fork_stop (EV_A_ &w->fork); 5172 ev_fork_stop (EV_A_ &w->fork);
5173#endif
5174
5175 ev_stop (EV_A_ (W)w);
3421 5176
3422 EV_FREQUENT_CHECK; 5177 EV_FREQUENT_CHECK;
3423} 5178}
3424#endif 5179#endif
3425 5180
3426#if EV_FORK_ENABLE 5181#if EV_FORK_ENABLE
3427void 5182void
3428ev_fork_start (EV_P_ ev_fork *w) 5183ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3429{ 5184{
3430 if (expect_false (ev_is_active (w))) 5185 if (ecb_expect_false (ev_is_active (w)))
3431 return; 5186 return;
3432 5187
3433 EV_FREQUENT_CHECK; 5188 EV_FREQUENT_CHECK;
3434 5189
3435 ev_start (EV_A_ (W)w, ++forkcnt); 5190 ev_start (EV_A_ (W)w, ++forkcnt);
3436 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5191 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3437 forks [forkcnt - 1] = w; 5192 forks [forkcnt - 1] = w;
3438 5193
3439 EV_FREQUENT_CHECK; 5194 EV_FREQUENT_CHECK;
3440} 5195}
3441 5196
3442void 5197void
3443ev_fork_stop (EV_P_ ev_fork *w) 5198ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3444{ 5199{
3445 clear_pending (EV_A_ (W)w); 5200 clear_pending (EV_A_ (W)w);
3446 if (expect_false (!ev_is_active (w))) 5201 if (ecb_expect_false (!ev_is_active (w)))
3447 return; 5202 return;
3448 5203
3449 EV_FREQUENT_CHECK; 5204 EV_FREQUENT_CHECK;
3450 5205
3451 { 5206 {
… …
3459 5214
3460 EV_FREQUENT_CHECK; 5215 EV_FREQUENT_CHECK;
3461} 5216}
3462#endif 5217#endif
3463 5218
5219#if EV_CLEANUP_ENABLE
5220void
5221ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5222{
5223 if (ecb_expect_false (ev_is_active (w)))
5224 return;
5225
5226 EV_FREQUENT_CHECK;
5227
5228 ev_start (EV_A_ (W)w, ++cleanupcnt);
5229 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5230 cleanups [cleanupcnt - 1] = w;
5231
5232 /* cleanup watchers should never keep a refcount on the loop */
5233 ev_unref (EV_A);
5234 EV_FREQUENT_CHECK;
5235}
5236
5237void
5238ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5239{
5240 clear_pending (EV_A_ (W)w);
5241 if (ecb_expect_false (!ev_is_active (w)))
5242 return;
5243
5244 EV_FREQUENT_CHECK;
5245 ev_ref (EV_A);
5246
5247 {
5248 int active = ev_active (w);
5249
5250 cleanups [active - 1] = cleanups [--cleanupcnt];
5251 ev_active (cleanups [active - 1]) = active;
5252 }
5253
5254 ev_stop (EV_A_ (W)w);
5255
5256 EV_FREQUENT_CHECK;
5257}
5258#endif
5259
3464#if EV_ASYNC_ENABLE 5260#if EV_ASYNC_ENABLE
3465void 5261void
3466ev_async_start (EV_P_ ev_async *w) 5262ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3467{ 5263{
3468 if (expect_false (ev_is_active (w))) 5264 if (ecb_expect_false (ev_is_active (w)))
3469 return; 5265 return;
3470 5266
5267 w->sent = 0;
5268
3471 evpipe_init (EV_A); 5269 evpipe_init (EV_A);
3472 5270
3473 EV_FREQUENT_CHECK; 5271 EV_FREQUENT_CHECK;
3474 5272
3475 ev_start (EV_A_ (W)w, ++asynccnt); 5273 ev_start (EV_A_ (W)w, ++asynccnt);
3476 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5274 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3477 asyncs [asynccnt - 1] = w; 5275 asyncs [asynccnt - 1] = w;
3478 5276
3479 EV_FREQUENT_CHECK; 5277 EV_FREQUENT_CHECK;
3480} 5278}
3481 5279
3482void 5280void
3483ev_async_stop (EV_P_ ev_async *w) 5281ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3484{ 5282{
3485 clear_pending (EV_A_ (W)w); 5283 clear_pending (EV_A_ (W)w);
3486 if (expect_false (!ev_is_active (w))) 5284 if (ecb_expect_false (!ev_is_active (w)))
3487 return; 5285 return;
3488 5286
3489 EV_FREQUENT_CHECK; 5287 EV_FREQUENT_CHECK;
3490 5288
3491 { 5289 {
… …
3499 5297
3500 EV_FREQUENT_CHECK; 5298 EV_FREQUENT_CHECK;
3501} 5299}
3502 5300
3503void 5301void
3504ev_async_send (EV_P_ ev_async *w) 5302ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3505{ 5303{
3506 w->sent = 1; 5304 w->sent = 1;
3507 evpipe_write (EV_A_ &async_pending); 5305 evpipe_write (EV_A_ &async_pending);
3508} 5306}
3509#endif 5307#endif
… …
3546 5344
3547 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5345 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3548} 5346}
3549 5347
3550void 5348void
3551ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5349ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3552{ 5350{
3553 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5351 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3554
3555 if (expect_false (!once))
3556 {
3557 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3558 return;
3559 }
3560 5352
3561 once->cb = cb; 5353 once->cb = cb;
3562 once->arg = arg; 5354 once->arg = arg;
3563 5355
3564 ev_init (&once->io, once_cb_io); 5356 ev_init (&once->io, once_cb_io);
… …
3577} 5369}
3578 5370
3579/*****************************************************************************/ 5371/*****************************************************************************/
3580 5372
3581#if EV_WALK_ENABLE 5373#if EV_WALK_ENABLE
5374ecb_cold
3582void 5375void
3583ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5376ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3584{ 5377{
3585 int i, j; 5378 int i, j;
3586 ev_watcher_list *wl, *wn; 5379 ev_watcher_list *wl, *wn;
3587 5380
3588 if (types & (EV_IO | EV_EMBED)) 5381 if (types & (EV_IO | EV_EMBED))
… …
3631 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5424 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3632#endif 5425#endif
3633 5426
3634#if EV_IDLE_ENABLE 5427#if EV_IDLE_ENABLE
3635 if (types & EV_IDLE) 5428 if (types & EV_IDLE)
3636 for (j = NUMPRI; i--; ) 5429 for (j = NUMPRI; j--; )
3637 for (i = idlecnt [j]; i--; ) 5430 for (i = idlecnt [j]; i--; )
3638 cb (EV_A_ EV_IDLE, idles [j][i]); 5431 cb (EV_A_ EV_IDLE, idles [j][i]);
3639#endif 5432#endif
3640 5433
3641#if EV_FORK_ENABLE 5434#if EV_FORK_ENABLE
… …
3649 if (types & EV_ASYNC) 5442 if (types & EV_ASYNC)
3650 for (i = asynccnt; i--; ) 5443 for (i = asynccnt; i--; )
3651 cb (EV_A_ EV_ASYNC, asyncs [i]); 5444 cb (EV_A_ EV_ASYNC, asyncs [i]);
3652#endif 5445#endif
3653 5446
5447#if EV_PREPARE_ENABLE
3654 if (types & EV_PREPARE) 5448 if (types & EV_PREPARE)
3655 for (i = preparecnt; i--; ) 5449 for (i = preparecnt; i--; )
3656#if EV_EMBED_ENABLE 5450# if EV_EMBED_ENABLE
3657 if (ev_cb (prepares [i]) != embed_prepare_cb) 5451 if (ev_cb (prepares [i]) != embed_prepare_cb)
3658#endif 5452# endif
3659 cb (EV_A_ EV_PREPARE, prepares [i]); 5453 cb (EV_A_ EV_PREPARE, prepares [i]);
5454#endif
3660 5455
5456#if EV_CHECK_ENABLE
3661 if (types & EV_CHECK) 5457 if (types & EV_CHECK)
3662 for (i = checkcnt; i--; ) 5458 for (i = checkcnt; i--; )
3663 cb (EV_A_ EV_CHECK, checks [i]); 5459 cb (EV_A_ EV_CHECK, checks [i]);
5460#endif
3664 5461
5462#if EV_SIGNAL_ENABLE
3665 if (types & EV_SIGNAL) 5463 if (types & EV_SIGNAL)
3666 for (i = 0; i < EV_NSIG - 1; ++i) 5464 for (i = 0; i < EV_NSIG - 1; ++i)
3667 for (wl = signals [i].head; wl; ) 5465 for (wl = signals [i].head; wl; )
3668 { 5466 {
3669 wn = wl->next; 5467 wn = wl->next;
3670 cb (EV_A_ EV_SIGNAL, wl); 5468 cb (EV_A_ EV_SIGNAL, wl);
3671 wl = wn; 5469 wl = wn;
3672 } 5470 }
5471#endif
3673 5472
5473#if EV_CHILD_ENABLE
3674 if (types & EV_CHILD) 5474 if (types & EV_CHILD)
3675 for (i = EV_PID_HASHSIZE; i--; ) 5475 for (i = (EV_PID_HASHSIZE); i--; )
3676 for (wl = childs [i]; wl; ) 5476 for (wl = childs [i]; wl; )
3677 { 5477 {
3678 wn = wl->next; 5478 wn = wl->next;
3679 cb (EV_A_ EV_CHILD, wl); 5479 cb (EV_A_ EV_CHILD, wl);
3680 wl = wn; 5480 wl = wn;
3681 } 5481 }
5482#endif
3682/* EV_STAT 0x00001000 /* stat data changed */ 5483/* EV_STAT 0x00001000 /* stat data changed */
3683/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 5484/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3684} 5485}
3685#endif 5486#endif
3686 5487
3687#if EV_MULTIPLICITY 5488#if EV_MULTIPLICITY
3688 #include "ev_wrap.h" 5489 #include "ev_wrap.h"
3689#endif 5490#endif
3690 5491
3691#ifdef __cplusplus
3692}
3693#endif
3694

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