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Comparing libev/ev.c (file contents):
Revision 1.351 by root, Sat Oct 16 06:46:55 2010 UTC vs.
Revision 1.513 by root, Fri Dec 20 05:20:23 2019 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 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
… …
113# else 115# else
114# undef EV_USE_EPOLL 116# undef EV_USE_EPOLL
115# define EV_USE_EPOLL 0 117# define EV_USE_EPOLL 0
116# endif 118# endif
117 119
120# if HAVE_LINUX_AIO_ABI_H
121# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
127# endif
128
129# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
130# ifndef EV_USE_IOURING
131# define EV_USE_IOURING EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_IOURING
135# define EV_USE_IOURING 0
136# endif
137
118# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 138# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
119# ifndef EV_USE_KQUEUE 139# ifndef EV_USE_KQUEUE
120# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 140# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
121# endif 141# endif
122# else 142# else
… …
157# endif 177# endif
158# else 178# else
159# undef EV_USE_EVENTFD 179# undef EV_USE_EVENTFD
160# define EV_USE_EVENTFD 0 180# define EV_USE_EVENTFD 0
161# endif 181# endif
162
163#endif
164 182
165#include <math.h> 183#endif
184
185/* OS X, in its infinite idiocy, actually HARDCODES
186 * a limit of 1024 into their select. Where people have brains,
187 * OS X engineers apparently have a vacuum. Or maybe they were
188 * ordered to have a vacuum, or they do anything for money.
189 * This might help. Or not.
190 * Note that this must be defined early, as other include files
191 * will rely on this define as well.
192 */
193#define _DARWIN_UNLIMITED_SELECT 1
194
166#include <stdlib.h> 195#include <stdlib.h>
167#include <string.h> 196#include <string.h>
168#include <fcntl.h> 197#include <fcntl.h>
169#include <stddef.h> 198#include <stddef.h>
170 199
… …
180 209
181#ifdef EV_H 210#ifdef EV_H
182# include EV_H 211# include EV_H
183#else 212#else
184# include "ev.h" 213# include "ev.h"
214#endif
215
216#if EV_NO_THREADS
217# undef EV_NO_SMP
218# define EV_NO_SMP 1
219# undef ECB_NO_THREADS
220# define ECB_NO_THREADS 1
221#endif
222#if EV_NO_SMP
223# undef EV_NO_SMP
224# define ECB_NO_SMP 1
185#endif 225#endif
186 226
187#ifndef _WIN32 227#ifndef _WIN32
188# include <sys/time.h> 228# include <sys/time.h>
189# include <sys/wait.h> 229# include <sys/wait.h>
190# include <unistd.h> 230# include <unistd.h>
191#else 231#else
192# include <io.h> 232# include <io.h>
193# define WIN32_LEAN_AND_MEAN 233# define WIN32_LEAN_AND_MEAN
234# include <winsock2.h>
194# include <windows.h> 235# include <windows.h>
195# ifndef EV_SELECT_IS_WINSOCKET 236# ifndef EV_SELECT_IS_WINSOCKET
196# define EV_SELECT_IS_WINSOCKET 1 237# define EV_SELECT_IS_WINSOCKET 1
197# endif 238# endif
198# undef EV_AVOID_STDIO 239# undef EV_AVOID_STDIO
199#endif 240#endif
200 241
201/* OS X, in its infinite idiocy, actually HARDCODES
202 * a limit of 1024 into their select. Where people have brains,
203 * OS X engineers apparently have a vacuum. Or maybe they were
204 * ordered to have a vacuum, or they do anything for money.
205 * This might help. Or not.
206 */
207#define _DARWIN_UNLIMITED_SELECT 1
208
209/* this block tries to deduce configuration from header-defined symbols and defaults */ 242/* this block tries to deduce configuration from header-defined symbols and defaults */
210 243
211/* try to deduce the maximum number of signals on this platform */ 244/* try to deduce the maximum number of signals on this platform */
212#if defined (EV_NSIG) 245#if defined EV_NSIG
213/* use what's provided */ 246/* use what's provided */
214#elif defined (NSIG) 247#elif defined NSIG
215# define EV_NSIG (NSIG) 248# define EV_NSIG (NSIG)
216#elif defined(_NSIG) 249#elif defined _NSIG
217# define EV_NSIG (_NSIG) 250# define EV_NSIG (_NSIG)
218#elif defined (SIGMAX) 251#elif defined SIGMAX
219# define EV_NSIG (SIGMAX+1) 252# define EV_NSIG (SIGMAX+1)
220#elif defined (SIG_MAX) 253#elif defined SIG_MAX
221# define EV_NSIG (SIG_MAX+1) 254# define EV_NSIG (SIG_MAX+1)
222#elif defined (_SIG_MAX) 255#elif defined _SIG_MAX
223# define EV_NSIG (_SIG_MAX+1) 256# define EV_NSIG (_SIG_MAX+1)
224#elif defined (MAXSIG) 257#elif defined MAXSIG
225# define EV_NSIG (MAXSIG+1) 258# define EV_NSIG (MAXSIG+1)
226#elif defined (MAX_SIG) 259#elif defined MAX_SIG
227# define EV_NSIG (MAX_SIG+1) 260# define EV_NSIG (MAX_SIG+1)
228#elif defined (SIGARRAYSIZE) 261#elif defined SIGARRAYSIZE
229# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 262# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
230#elif defined (_sys_nsig) 263#elif defined _sys_nsig
231# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 264# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
232#else 265#else
233# error "unable to find value for NSIG, please report" 266# define EV_NSIG (8 * sizeof (sigset_t) + 1)
234/* to make it compile regardless, just remove the above line, */ 267#endif
235/* but consider reporting it, too! :) */ 268
236# define EV_NSIG 65 269#ifndef EV_USE_FLOOR
270# define EV_USE_FLOOR 0
237#endif 271#endif
238 272
239#ifndef EV_USE_CLOCK_SYSCALL 273#ifndef EV_USE_CLOCK_SYSCALL
240# if __linux && __GLIBC__ >= 2 274# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
241# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 275# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
242# else 276# else
243# define EV_USE_CLOCK_SYSCALL 0 277# define EV_USE_CLOCK_SYSCALL 0
244# endif 278# endif
245#endif 279#endif
246 280
281#if !(_POSIX_TIMERS > 0)
282# ifndef EV_USE_MONOTONIC
283# define EV_USE_MONOTONIC 0
284# endif
285# ifndef EV_USE_REALTIME
286# define EV_USE_REALTIME 0
287# endif
288#endif
289
247#ifndef EV_USE_MONOTONIC 290#ifndef EV_USE_MONOTONIC
248# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 291# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
249# define EV_USE_MONOTONIC EV_FEATURE_OS 292# define EV_USE_MONOTONIC EV_FEATURE_OS
250# else 293# else
251# define EV_USE_MONOTONIC 0 294# define EV_USE_MONOTONIC 0
252# endif 295# endif
253#endif 296#endif
… …
290 333
291#ifndef EV_USE_PORT 334#ifndef EV_USE_PORT
292# define EV_USE_PORT 0 335# define EV_USE_PORT 0
293#endif 336#endif
294 337
338#ifndef EV_USE_LINUXAIO
339# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
340# define EV_USE_LINUXAIO 1
341# else
342# define EV_USE_LINUXAIO 0
343# endif
344#endif
345
346#ifndef EV_USE_IOURING
347# if __linux /* later checks might disable again */
348# define EV_USE_IOURING 1
349# else
350# define EV_USE_IOURING 0
351# endif
352#endif
353
295#ifndef EV_USE_INOTIFY 354#ifndef EV_USE_INOTIFY
296# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 355# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
297# define EV_USE_INOTIFY EV_FEATURE_OS 356# define EV_USE_INOTIFY EV_FEATURE_OS
298# else 357# else
299# define EV_USE_INOTIFY 0 358# define EV_USE_INOTIFY 0
… …
340 399
341#ifndef EV_HEAP_CACHE_AT 400#ifndef EV_HEAP_CACHE_AT
342# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 401# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
343#endif 402#endif
344 403
404#ifdef __ANDROID__
405/* supposedly, android doesn't typedef fd_mask */
406# undef EV_USE_SELECT
407# define EV_USE_SELECT 0
408/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
409# undef EV_USE_CLOCK_SYSCALL
410# define EV_USE_CLOCK_SYSCALL 0
411#endif
412
413/* aix's poll.h seems to cause lots of trouble */
414#ifdef _AIX
415/* AIX has a completely broken poll.h header */
416# undef EV_USE_POLL
417# define EV_USE_POLL 0
418#endif
419
345/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 420/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
346/* which makes programs even slower. might work on other unices, too. */ 421/* which makes programs even slower. might work on other unices, too. */
347#if EV_USE_CLOCK_SYSCALL 422#if EV_USE_CLOCK_SYSCALL
348# include <syscall.h> 423# include <sys/syscall.h>
349# ifdef SYS_clock_gettime 424# ifdef SYS_clock_gettime
350# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 425# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
351# undef EV_USE_MONOTONIC 426# undef EV_USE_MONOTONIC
352# define EV_USE_MONOTONIC 1 427# define EV_USE_MONOTONIC 1
428# define EV_NEED_SYSCALL 1
353# else 429# else
354# undef EV_USE_CLOCK_SYSCALL 430# undef EV_USE_CLOCK_SYSCALL
355# define EV_USE_CLOCK_SYSCALL 0 431# define EV_USE_CLOCK_SYSCALL 0
356# endif 432# endif
357#endif 433#endif
358 434
359/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 435/* this block fixes any misconfiguration where we know we run into trouble otherwise */
360 436
361#ifdef _AIX
362/* AIX has a completely broken poll.h header */
363# undef EV_USE_POLL
364# define EV_USE_POLL 0
365#endif
366
367#ifndef CLOCK_MONOTONIC 437#ifndef CLOCK_MONOTONIC
368# undef EV_USE_MONOTONIC 438# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 0 439# define EV_USE_MONOTONIC 0
370#endif 440#endif
371 441
… …
377#if !EV_STAT_ENABLE 447#if !EV_STAT_ENABLE
378# undef EV_USE_INOTIFY 448# undef EV_USE_INOTIFY
379# define EV_USE_INOTIFY 0 449# define EV_USE_INOTIFY 0
380#endif 450#endif
381 451
452#if __linux && EV_USE_IOURING
453# include <linux/version.h>
454# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
455# undef EV_USE_IOURING
456# define EV_USE_IOURING 0
457# endif
458#endif
459
382#if !EV_USE_NANOSLEEP 460#if !EV_USE_NANOSLEEP
383# ifndef _WIN32 461/* hp-ux has it in sys/time.h, which we unconditionally include above */
462# if !defined _WIN32 && !defined __hpux
384# include <sys/select.h> 463# include <sys/select.h>
385# endif 464# endif
386#endif 465#endif
387 466
467#if EV_USE_LINUXAIO
468# include <sys/syscall.h>
469# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
470# define EV_NEED_SYSCALL 1
471# else
472# undef EV_USE_LINUXAIO
473# define EV_USE_LINUXAIO 0
474# endif
475#endif
476
477#if EV_USE_IOURING
478# include <sys/syscall.h>
479# if !SYS_io_uring_setup && __linux && !__alpha
480# define SYS_io_uring_setup 425
481# define SYS_io_uring_enter 426
482# define SYS_io_uring_wregister 427
483# endif
484# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
485# define EV_NEED_SYSCALL 1
486# else
487# undef EV_USE_IOURING
488# define EV_USE_IOURING 0
489# endif
490#endif
491
388#if EV_USE_INOTIFY 492#if EV_USE_INOTIFY
389# include <sys/utsname.h>
390# include <sys/statfs.h> 493# include <sys/statfs.h>
391# include <sys/inotify.h> 494# include <sys/inotify.h>
392/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 495/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
393# ifndef IN_DONT_FOLLOW 496# ifndef IN_DONT_FOLLOW
394# undef EV_USE_INOTIFY 497# undef EV_USE_INOTIFY
395# define EV_USE_INOTIFY 0 498# define EV_USE_INOTIFY 0
396# endif 499# endif
397#endif
398
399#if EV_SELECT_IS_WINSOCKET
400# include <winsock.h>
401#endif 500#endif
402 501
403#if EV_USE_EVENTFD 502#if EV_USE_EVENTFD
404/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 503/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
405# include <stdint.h> 504# include <stdint.h>
… …
411# define EFD_CLOEXEC O_CLOEXEC 510# define EFD_CLOEXEC O_CLOEXEC
412# else 511# else
413# define EFD_CLOEXEC 02000000 512# define EFD_CLOEXEC 02000000
414# endif 513# endif
415# endif 514# endif
416# ifdef __cplusplus
417extern "C" {
418# endif
419int (eventfd) (unsigned int initval, int flags); 515EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
420# ifdef __cplusplus
421}
422# endif
423#endif 516#endif
424 517
425#if EV_USE_SIGNALFD 518#if EV_USE_SIGNALFD
426/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 519/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
427# include <stdint.h> 520# include <stdint.h>
… …
433# define SFD_CLOEXEC O_CLOEXEC 526# define SFD_CLOEXEC O_CLOEXEC
434# else 527# else
435# define SFD_CLOEXEC 02000000 528# define SFD_CLOEXEC 02000000
436# endif 529# endif
437# endif 530# endif
438# ifdef __cplusplus
439extern "C" {
440# endif
441int signalfd (int fd, const sigset_t *mask, int flags); 531EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
442 532
443struct signalfd_siginfo 533struct signalfd_siginfo
444{ 534{
445 uint32_t ssi_signo; 535 uint32_t ssi_signo;
446 char pad[128 - sizeof (uint32_t)]; 536 char pad[128 - sizeof (uint32_t)];
447}; 537};
448# ifdef __cplusplus
449}
450# endif 538#endif
451#endif
452 539
453/**/ 540/*****************************************************************************/
454 541
455#if EV_VERIFY >= 3 542#if EV_VERIFY >= 3
456# define EV_FREQUENT_CHECK ev_verify (EV_A) 543# define EV_FREQUENT_CHECK ev_verify (EV_A)
457#else 544#else
458# define EV_FREQUENT_CHECK do { } while (0) 545# define EV_FREQUENT_CHECK do { } while (0)
459#endif 546#endif
460 547
461/* 548/*
462 * This is used to avoid floating point rounding problems. 549 * This is used to work around floating point rounding problems.
463 * It is added to ev_rt_now when scheduling periodics
464 * to ensure progress, time-wise, even when rounding
465 * errors are against us.
466 * This value is good at least till the year 4000. 550 * This value is good at least till the year 4000.
467 * Better solutions welcome.
468 */ 551 */
469#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 552#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
553/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
470 554
471#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 555#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
472#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 556#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
473 557
558/* find a portable timestamp that is "always" in the future but fits into time_t.
559 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
560 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
561#define EV_TSTAMP_HUGE \
562 (sizeof (time_t) >= 8 ? 10000000000000. \
563 : 0 < (time_t)4294967295 ? 4294967295. \
564 : 2147483647.) \
565
566#ifndef EV_TS_CONST
567# define EV_TS_CONST(nv) nv
568# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
569# define EV_TS_FROM_USEC(us) us * 1e-6
474#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 570# define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
475#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 571# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
572# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
573# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
574#endif
476 575
576/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
577/* ECB.H BEGIN */
578/*
579 * libecb - http://software.schmorp.de/pkg/libecb
580 *
581 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
582 * Copyright (©) 2011 Emanuele Giaquinta
583 * All rights reserved.
584 *
585 * Redistribution and use in source and binary forms, with or without modifica-
586 * tion, are permitted provided that the following conditions are met:
587 *
588 * 1. Redistributions of source code must retain the above copyright notice,
589 * this list of conditions and the following disclaimer.
590 *
591 * 2. Redistributions in binary form must reproduce the above copyright
592 * notice, this list of conditions and the following disclaimer in the
593 * documentation and/or other materials provided with the distribution.
594 *
595 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
596 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
597 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
598 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
599 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
600 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
601 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
602 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
603 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
604 * OF THE POSSIBILITY OF SUCH DAMAGE.
605 *
606 * Alternatively, the contents of this file may be used under the terms of
607 * the GNU General Public License ("GPL") version 2 or any later version,
608 * in which case the provisions of the GPL are applicable instead of
609 * the above. If you wish to allow the use of your version of this file
610 * only under the terms of the GPL and not to allow others to use your
611 * version of this file under the BSD license, indicate your decision
612 * by deleting the provisions above and replace them with the notice
613 * and other provisions required by the GPL. If you do not delete the
614 * provisions above, a recipient may use your version of this file under
615 * either the BSD or the GPL.
616 */
617
618#ifndef ECB_H
619#define ECB_H
620
621/* 16 bits major, 16 bits minor */
622#define ECB_VERSION 0x00010006
623
624#ifdef _WIN32
625 typedef signed char int8_t;
626 typedef unsigned char uint8_t;
627 typedef signed short int16_t;
628 typedef unsigned short uint16_t;
629 typedef signed int int32_t;
630 typedef unsigned int uint32_t;
477#if __GNUC__ >= 4 631 #if __GNUC__
478# define expect(expr,value) __builtin_expect ((expr),(value)) 632 typedef signed long long int64_t;
479# define noinline __attribute__ ((noinline)) 633 typedef unsigned long long uint64_t;
634 #else /* _MSC_VER || __BORLANDC__ */
635 typedef signed __int64 int64_t;
636 typedef unsigned __int64 uint64_t;
637 #endif
638 #ifdef _WIN64
639 #define ECB_PTRSIZE 8
640 typedef uint64_t uintptr_t;
641 typedef int64_t intptr_t;
642 #else
643 #define ECB_PTRSIZE 4
644 typedef uint32_t uintptr_t;
645 typedef int32_t intptr_t;
646 #endif
480#else 647#else
481# define expect(expr,value) (expr) 648 #include <inttypes.h>
482# define noinline 649 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
483# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 650 #define ECB_PTRSIZE 8
484# define inline 651 #else
652 #define ECB_PTRSIZE 4
653 #endif
485# endif 654#endif
655
656#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
657#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
658
659/* work around x32 idiocy by defining proper macros */
660#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
661 #if _ILP32
662 #define ECB_AMD64_X32 1
663 #else
664 #define ECB_AMD64 1
486#endif 665 #endif
666#endif
487 667
668/* many compilers define _GNUC_ to some versions but then only implement
669 * what their idiot authors think are the "more important" extensions,
670 * causing enormous grief in return for some better fake benchmark numbers.
671 * or so.
672 * we try to detect these and simply assume they are not gcc - if they have
673 * an issue with that they should have done it right in the first place.
674 */
675#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
676 #define ECB_GCC_VERSION(major,minor) 0
677#else
678 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
679#endif
680
681#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
682
683#if __clang__ && defined __has_builtin
684 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
685#else
686 #define ECB_CLANG_BUILTIN(x) 0
687#endif
688
689#if __clang__ && defined __has_extension
690 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
691#else
692 #define ECB_CLANG_EXTENSION(x) 0
693#endif
694
695#define ECB_CPP (__cplusplus+0)
696#define ECB_CPP11 (__cplusplus >= 201103L)
697#define ECB_CPP14 (__cplusplus >= 201402L)
698#define ECB_CPP17 (__cplusplus >= 201703L)
699
700#if ECB_CPP
701 #define ECB_C 0
702 #define ECB_STDC_VERSION 0
703#else
704 #define ECB_C 1
705 #define ECB_STDC_VERSION __STDC_VERSION__
706#endif
707
708#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
709#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
710#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
711
712#if ECB_CPP
713 #define ECB_EXTERN_C extern "C"
714 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
715 #define ECB_EXTERN_C_END }
716#else
717 #define ECB_EXTERN_C extern
718 #define ECB_EXTERN_C_BEG
719 #define ECB_EXTERN_C_END
720#endif
721
722/*****************************************************************************/
723
724/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
725/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
726
727#if ECB_NO_THREADS
728 #define ECB_NO_SMP 1
729#endif
730
731#if ECB_NO_SMP
732 #define ECB_MEMORY_FENCE do { } while (0)
733#endif
734
735/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
736#if __xlC__ && ECB_CPP
737 #include <builtins.h>
738#endif
739
740#if 1400 <= _MSC_VER
741 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
742#endif
743
744#ifndef ECB_MEMORY_FENCE
745 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
746 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
747 #if __i386 || __i386__
748 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
749 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
750 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
751 #elif ECB_GCC_AMD64
752 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
753 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
754 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
755 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
756 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
757 #elif defined __ARM_ARCH_2__ \
758 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
759 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
760 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
761 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
762 || defined __ARM_ARCH_5TEJ__
763 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
764 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
765 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
766 || defined __ARM_ARCH_6T2__
767 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
768 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
769 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
770 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
771 #elif __aarch64__
772 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
773 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
774 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
775 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
776 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
777 #elif defined __s390__ || defined __s390x__
778 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
779 #elif defined __mips__
780 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
781 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
782 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
783 #elif defined __alpha__
784 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
785 #elif defined __hppa__
786 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
787 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
788 #elif defined __ia64__
789 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
790 #elif defined __m68k__
791 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
792 #elif defined __m88k__
793 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
794 #elif defined __sh__
795 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
796 #endif
797 #endif
798#endif
799
800#ifndef ECB_MEMORY_FENCE
801 #if ECB_GCC_VERSION(4,7)
802 /* see comment below (stdatomic.h) about the C11 memory model. */
803 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
804 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
805 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
806 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
807
808 #elif ECB_CLANG_EXTENSION(c_atomic)
809 /* see comment below (stdatomic.h) about the C11 memory model. */
810 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
811 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
812 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
813 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
814
815 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
816 #define ECB_MEMORY_FENCE __sync_synchronize ()
817 #elif _MSC_VER >= 1500 /* VC++ 2008 */
818 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
819 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
820 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
821 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
822 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
823 #elif _MSC_VER >= 1400 /* VC++ 2005 */
824 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
825 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
826 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
827 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
828 #elif defined _WIN32
829 #include <WinNT.h>
830 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
831 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
832 #include <mbarrier.h>
833 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
834 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
835 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
836 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
837 #elif __xlC__
838 #define ECB_MEMORY_FENCE __sync ()
839 #endif
840#endif
841
842#ifndef ECB_MEMORY_FENCE
843 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
844 /* we assume that these memory fences work on all variables/all memory accesses, */
845 /* not just C11 atomics and atomic accesses */
846 #include <stdatomic.h>
847 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
848 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
849 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
850 #endif
851#endif
852
853#ifndef ECB_MEMORY_FENCE
854 #if !ECB_AVOID_PTHREADS
855 /*
856 * if you get undefined symbol references to pthread_mutex_lock,
857 * or failure to find pthread.h, then you should implement
858 * the ECB_MEMORY_FENCE operations for your cpu/compiler
859 * OR provide pthread.h and link against the posix thread library
860 * of your system.
861 */
862 #include <pthread.h>
863 #define ECB_NEEDS_PTHREADS 1
864 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
865
866 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
867 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
868 #endif
869#endif
870
871#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
872 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
873#endif
874
875#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
876 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
877#endif
878
879#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
880 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
881#endif
882
883/*****************************************************************************/
884
885#if ECB_CPP
886 #define ecb_inline static inline
887#elif ECB_GCC_VERSION(2,5)
888 #define ecb_inline static __inline__
889#elif ECB_C99
890 #define ecb_inline static inline
891#else
892 #define ecb_inline static
893#endif
894
895#if ECB_GCC_VERSION(3,3)
896 #define ecb_restrict __restrict__
897#elif ECB_C99
898 #define ecb_restrict restrict
899#else
900 #define ecb_restrict
901#endif
902
903typedef int ecb_bool;
904
905#define ECB_CONCAT_(a, b) a ## b
906#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
907#define ECB_STRINGIFY_(a) # a
908#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
909#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
910
911#define ecb_function_ ecb_inline
912
913#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
914 #define ecb_attribute(attrlist) __attribute__ (attrlist)
915#else
916 #define ecb_attribute(attrlist)
917#endif
918
919#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
920 #define ecb_is_constant(expr) __builtin_constant_p (expr)
921#else
922 /* possible C11 impl for integral types
923 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
924 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
925
926 #define ecb_is_constant(expr) 0
927#endif
928
929#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
930 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
931#else
932 #define ecb_expect(expr,value) (expr)
933#endif
934
935#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
936 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
937#else
938 #define ecb_prefetch(addr,rw,locality)
939#endif
940
941/* no emulation for ecb_decltype */
942#if ECB_CPP11
943 // older implementations might have problems with decltype(x)::type, work around it
944 template<class T> struct ecb_decltype_t { typedef T type; };
945 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
946#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
947 #define ecb_decltype(x) __typeof__ (x)
948#endif
949
950#if _MSC_VER >= 1300
951 #define ecb_deprecated __declspec (deprecated)
952#else
953 #define ecb_deprecated ecb_attribute ((__deprecated__))
954#endif
955
956#if _MSC_VER >= 1500
957 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
958#elif ECB_GCC_VERSION(4,5)
959 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
960#else
961 #define ecb_deprecated_message(msg) ecb_deprecated
962#endif
963
964#if _MSC_VER >= 1400
965 #define ecb_noinline __declspec (noinline)
966#else
967 #define ecb_noinline ecb_attribute ((__noinline__))
968#endif
969
970#define ecb_unused ecb_attribute ((__unused__))
971#define ecb_const ecb_attribute ((__const__))
972#define ecb_pure ecb_attribute ((__pure__))
973
974#if ECB_C11 || __IBMC_NORETURN
975 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
976 #define ecb_noreturn _Noreturn
977#elif ECB_CPP11
978 #define ecb_noreturn [[noreturn]]
979#elif _MSC_VER >= 1200
980 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
981 #define ecb_noreturn __declspec (noreturn)
982#else
983 #define ecb_noreturn ecb_attribute ((__noreturn__))
984#endif
985
986#if ECB_GCC_VERSION(4,3)
987 #define ecb_artificial ecb_attribute ((__artificial__))
988 #define ecb_hot ecb_attribute ((__hot__))
989 #define ecb_cold ecb_attribute ((__cold__))
990#else
991 #define ecb_artificial
992 #define ecb_hot
993 #define ecb_cold
994#endif
995
996/* put around conditional expressions if you are very sure that the */
997/* expression is mostly true or mostly false. note that these return */
998/* booleans, not the expression. */
488#define expect_false(expr) expect ((expr) != 0, 0) 999#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
489#define expect_true(expr) expect ((expr) != 0, 1) 1000#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
1001/* for compatibility to the rest of the world */
1002#define ecb_likely(expr) ecb_expect_true (expr)
1003#define ecb_unlikely(expr) ecb_expect_false (expr)
1004
1005/* count trailing zero bits and count # of one bits */
1006#if ECB_GCC_VERSION(3,4) \
1007 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1008 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1009 && ECB_CLANG_BUILTIN(__builtin_popcount))
1010 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1011 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1012 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1013 #define ecb_ctz32(x) __builtin_ctz (x)
1014 #define ecb_ctz64(x) __builtin_ctzll (x)
1015 #define ecb_popcount32(x) __builtin_popcount (x)
1016 /* no popcountll */
1017#else
1018 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1019 ecb_function_ ecb_const int
1020 ecb_ctz32 (uint32_t x)
1021 {
1022#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1023 unsigned long r;
1024 _BitScanForward (&r, x);
1025 return (int)r;
1026#else
1027 int r = 0;
1028
1029 x &= ~x + 1; /* this isolates the lowest bit */
1030
1031#if ECB_branchless_on_i386
1032 r += !!(x & 0xaaaaaaaa) << 0;
1033 r += !!(x & 0xcccccccc) << 1;
1034 r += !!(x & 0xf0f0f0f0) << 2;
1035 r += !!(x & 0xff00ff00) << 3;
1036 r += !!(x & 0xffff0000) << 4;
1037#else
1038 if (x & 0xaaaaaaaa) r += 1;
1039 if (x & 0xcccccccc) r += 2;
1040 if (x & 0xf0f0f0f0) r += 4;
1041 if (x & 0xff00ff00) r += 8;
1042 if (x & 0xffff0000) r += 16;
1043#endif
1044
1045 return r;
1046#endif
1047 }
1048
1049 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1050 ecb_function_ ecb_const int
1051 ecb_ctz64 (uint64_t x)
1052 {
1053#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1054 unsigned long r;
1055 _BitScanForward64 (&r, x);
1056 return (int)r;
1057#else
1058 int shift = x & 0xffffffff ? 0 : 32;
1059 return ecb_ctz32 (x >> shift) + shift;
1060#endif
1061 }
1062
1063 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1064 ecb_function_ ecb_const int
1065 ecb_popcount32 (uint32_t x)
1066 {
1067 x -= (x >> 1) & 0x55555555;
1068 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1069 x = ((x >> 4) + x) & 0x0f0f0f0f;
1070 x *= 0x01010101;
1071
1072 return x >> 24;
1073 }
1074
1075 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1076 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1077 {
1078#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1079 unsigned long r;
1080 _BitScanReverse (&r, x);
1081 return (int)r;
1082#else
1083 int r = 0;
1084
1085 if (x >> 16) { x >>= 16; r += 16; }
1086 if (x >> 8) { x >>= 8; r += 8; }
1087 if (x >> 4) { x >>= 4; r += 4; }
1088 if (x >> 2) { x >>= 2; r += 2; }
1089 if (x >> 1) { r += 1; }
1090
1091 return r;
1092#endif
1093 }
1094
1095 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1096 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1097 {
1098#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1099 unsigned long r;
1100 _BitScanReverse64 (&r, x);
1101 return (int)r;
1102#else
1103 int r = 0;
1104
1105 if (x >> 32) { x >>= 32; r += 32; }
1106
1107 return r + ecb_ld32 (x);
1108#endif
1109 }
1110#endif
1111
1112ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1113ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1114ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1115ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1116
1117ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1118ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1119{
1120 return ( (x * 0x0802U & 0x22110U)
1121 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1122}
1123
1124ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1125ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1126{
1127 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1128 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1129 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1130 x = ( x >> 8 ) | ( x << 8);
1131
1132 return x;
1133}
1134
1135ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1136ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1137{
1138 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1139 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1140 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1141 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1142 x = ( x >> 16 ) | ( x << 16);
1143
1144 return x;
1145}
1146
1147/* popcount64 is only available on 64 bit cpus as gcc builtin */
1148/* so for this version we are lazy */
1149ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1150ecb_function_ ecb_const int
1151ecb_popcount64 (uint64_t x)
1152{
1153 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1154}
1155
1156ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1157ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1158ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1159ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1160ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1161ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1162ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1163ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1164
1165ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1166ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1167ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1168ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1169ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1170ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1171ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1172ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1173
1174#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1175 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1176 #define ecb_bswap16(x) __builtin_bswap16 (x)
1177 #else
1178 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1179 #endif
1180 #define ecb_bswap32(x) __builtin_bswap32 (x)
1181 #define ecb_bswap64(x) __builtin_bswap64 (x)
1182#elif _MSC_VER
1183 #include <stdlib.h>
1184 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1185 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1186 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1187#else
1188 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1189 ecb_function_ ecb_const uint16_t
1190 ecb_bswap16 (uint16_t x)
1191 {
1192 return ecb_rotl16 (x, 8);
1193 }
1194
1195 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1196 ecb_function_ ecb_const uint32_t
1197 ecb_bswap32 (uint32_t x)
1198 {
1199 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1200 }
1201
1202 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1203 ecb_function_ ecb_const uint64_t
1204 ecb_bswap64 (uint64_t x)
1205 {
1206 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1207 }
1208#endif
1209
1210#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1211 #define ecb_unreachable() __builtin_unreachable ()
1212#else
1213 /* this seems to work fine, but gcc always emits a warning for it :/ */
1214 ecb_inline ecb_noreturn void ecb_unreachable (void);
1215 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1216#endif
1217
1218/* try to tell the compiler that some condition is definitely true */
1219#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1220
1221ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1222ecb_inline ecb_const uint32_t
1223ecb_byteorder_helper (void)
1224{
1225 /* the union code still generates code under pressure in gcc, */
1226 /* but less than using pointers, and always seems to */
1227 /* successfully return a constant. */
1228 /* the reason why we have this horrible preprocessor mess */
1229 /* is to avoid it in all cases, at least on common architectures */
1230 /* or when using a recent enough gcc version (>= 4.6) */
1231#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1232 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1233 #define ECB_LITTLE_ENDIAN 1
1234 return 0x44332211;
1235#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1236 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1237 #define ECB_BIG_ENDIAN 1
1238 return 0x11223344;
1239#else
1240 union
1241 {
1242 uint8_t c[4];
1243 uint32_t u;
1244 } u = { 0x11, 0x22, 0x33, 0x44 };
1245 return u.u;
1246#endif
1247}
1248
1249ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1250ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1251ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1252ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1253
1254#if ECB_GCC_VERSION(3,0) || ECB_C99
1255 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1256#else
1257 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1258#endif
1259
1260#if ECB_CPP
1261 template<typename T>
1262 static inline T ecb_div_rd (T val, T div)
1263 {
1264 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1265 }
1266 template<typename T>
1267 static inline T ecb_div_ru (T val, T div)
1268 {
1269 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1270 }
1271#else
1272 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1273 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1274#endif
1275
1276#if ecb_cplusplus_does_not_suck
1277 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1278 template<typename T, int N>
1279 static inline int ecb_array_length (const T (&arr)[N])
1280 {
1281 return N;
1282 }
1283#else
1284 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1285#endif
1286
1287ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1288ecb_function_ ecb_const uint32_t
1289ecb_binary16_to_binary32 (uint32_t x)
1290{
1291 unsigned int s = (x & 0x8000) << (31 - 15);
1292 int e = (x >> 10) & 0x001f;
1293 unsigned int m = x & 0x03ff;
1294
1295 if (ecb_expect_false (e == 31))
1296 /* infinity or NaN */
1297 e = 255 - (127 - 15);
1298 else if (ecb_expect_false (!e))
1299 {
1300 if (ecb_expect_true (!m))
1301 /* zero, handled by code below by forcing e to 0 */
1302 e = 0 - (127 - 15);
1303 else
1304 {
1305 /* subnormal, renormalise */
1306 unsigned int s = 10 - ecb_ld32 (m);
1307
1308 m = (m << s) & 0x3ff; /* mask implicit bit */
1309 e -= s - 1;
1310 }
1311 }
1312
1313 /* e and m now are normalised, or zero, (or inf or nan) */
1314 e += 127 - 15;
1315
1316 return s | (e << 23) | (m << (23 - 10));
1317}
1318
1319ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1320ecb_function_ ecb_const uint16_t
1321ecb_binary32_to_binary16 (uint32_t x)
1322{
1323 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1324 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1325 unsigned int m = x & 0x007fffff;
1326
1327 x &= 0x7fffffff;
1328
1329 /* if it's within range of binary16 normals, use fast path */
1330 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1331 {
1332 /* mantissa round-to-even */
1333 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1334
1335 /* handle overflow */
1336 if (ecb_expect_false (m >= 0x00800000))
1337 {
1338 m >>= 1;
1339 e += 1;
1340 }
1341
1342 return s | (e << 10) | (m >> (23 - 10));
1343 }
1344
1345 /* handle large numbers and infinity */
1346 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1347 return s | 0x7c00;
1348
1349 /* handle zero, subnormals and small numbers */
1350 if (ecb_expect_true (x < 0x38800000))
1351 {
1352 /* zero */
1353 if (ecb_expect_true (!x))
1354 return s;
1355
1356 /* handle subnormals */
1357
1358 /* too small, will be zero */
1359 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1360 return s;
1361
1362 m |= 0x00800000; /* make implicit bit explicit */
1363
1364 /* very tricky - we need to round to the nearest e (+10) bit value */
1365 {
1366 unsigned int bits = 14 - e;
1367 unsigned int half = (1 << (bits - 1)) - 1;
1368 unsigned int even = (m >> bits) & 1;
1369
1370 /* if this overflows, we will end up with a normalised number */
1371 m = (m + half + even) >> bits;
1372 }
1373
1374 return s | m;
1375 }
1376
1377 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1378 m >>= 13;
1379
1380 return s | 0x7c00 | m | !m;
1381}
1382
1383/*******************************************************************************/
1384/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1385
1386/* basically, everything uses "ieee pure-endian" floating point numbers */
1387/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1388#if 0 \
1389 || __i386 || __i386__ \
1390 || ECB_GCC_AMD64 \
1391 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1392 || defined __s390__ || defined __s390x__ \
1393 || defined __mips__ \
1394 || defined __alpha__ \
1395 || defined __hppa__ \
1396 || defined __ia64__ \
1397 || defined __m68k__ \
1398 || defined __m88k__ \
1399 || defined __sh__ \
1400 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1401 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1402 || defined __aarch64__
1403 #define ECB_STDFP 1
1404 #include <string.h> /* for memcpy */
1405#else
1406 #define ECB_STDFP 0
1407#endif
1408
1409#ifndef ECB_NO_LIBM
1410
1411 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1412
1413 /* only the oldest of old doesn't have this one. solaris. */
1414 #ifdef INFINITY
1415 #define ECB_INFINITY INFINITY
1416 #else
1417 #define ECB_INFINITY HUGE_VAL
1418 #endif
1419
1420 #ifdef NAN
1421 #define ECB_NAN NAN
1422 #else
1423 #define ECB_NAN ECB_INFINITY
1424 #endif
1425
1426 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1427 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1428 #define ecb_frexpf(x,e) frexpf ((x), (e))
1429 #else
1430 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1431 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1432 #endif
1433
1434 /* convert a float to ieee single/binary32 */
1435 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1436 ecb_function_ ecb_const uint32_t
1437 ecb_float_to_binary32 (float x)
1438 {
1439 uint32_t r;
1440
1441 #if ECB_STDFP
1442 memcpy (&r, &x, 4);
1443 #else
1444 /* slow emulation, works for anything but -0 */
1445 uint32_t m;
1446 int e;
1447
1448 if (x == 0e0f ) return 0x00000000U;
1449 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1450 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1451 if (x != x ) return 0x7fbfffffU;
1452
1453 m = ecb_frexpf (x, &e) * 0x1000000U;
1454
1455 r = m & 0x80000000U;
1456
1457 if (r)
1458 m = -m;
1459
1460 if (e <= -126)
1461 {
1462 m &= 0xffffffU;
1463 m >>= (-125 - e);
1464 e = -126;
1465 }
1466
1467 r |= (e + 126) << 23;
1468 r |= m & 0x7fffffU;
1469 #endif
1470
1471 return r;
1472 }
1473
1474 /* converts an ieee single/binary32 to a float */
1475 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1476 ecb_function_ ecb_const float
1477 ecb_binary32_to_float (uint32_t x)
1478 {
1479 float r;
1480
1481 #if ECB_STDFP
1482 memcpy (&r, &x, 4);
1483 #else
1484 /* emulation, only works for normals and subnormals and +0 */
1485 int neg = x >> 31;
1486 int e = (x >> 23) & 0xffU;
1487
1488 x &= 0x7fffffU;
1489
1490 if (e)
1491 x |= 0x800000U;
1492 else
1493 e = 1;
1494
1495 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1496 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1497
1498 r = neg ? -r : r;
1499 #endif
1500
1501 return r;
1502 }
1503
1504 /* convert a double to ieee double/binary64 */
1505 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1506 ecb_function_ ecb_const uint64_t
1507 ecb_double_to_binary64 (double x)
1508 {
1509 uint64_t r;
1510
1511 #if ECB_STDFP
1512 memcpy (&r, &x, 8);
1513 #else
1514 /* slow emulation, works for anything but -0 */
1515 uint64_t m;
1516 int e;
1517
1518 if (x == 0e0 ) return 0x0000000000000000U;
1519 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1520 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1521 if (x != x ) return 0X7ff7ffffffffffffU;
1522
1523 m = frexp (x, &e) * 0x20000000000000U;
1524
1525 r = m & 0x8000000000000000;;
1526
1527 if (r)
1528 m = -m;
1529
1530 if (e <= -1022)
1531 {
1532 m &= 0x1fffffffffffffU;
1533 m >>= (-1021 - e);
1534 e = -1022;
1535 }
1536
1537 r |= ((uint64_t)(e + 1022)) << 52;
1538 r |= m & 0xfffffffffffffU;
1539 #endif
1540
1541 return r;
1542 }
1543
1544 /* converts an ieee double/binary64 to a double */
1545 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1546 ecb_function_ ecb_const double
1547 ecb_binary64_to_double (uint64_t x)
1548 {
1549 double r;
1550
1551 #if ECB_STDFP
1552 memcpy (&r, &x, 8);
1553 #else
1554 /* emulation, only works for normals and subnormals and +0 */
1555 int neg = x >> 63;
1556 int e = (x >> 52) & 0x7ffU;
1557
1558 x &= 0xfffffffffffffU;
1559
1560 if (e)
1561 x |= 0x10000000000000U;
1562 else
1563 e = 1;
1564
1565 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1566 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1567
1568 r = neg ? -r : r;
1569 #endif
1570
1571 return r;
1572 }
1573
1574 /* convert a float to ieee half/binary16 */
1575 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1576 ecb_function_ ecb_const uint16_t
1577 ecb_float_to_binary16 (float x)
1578 {
1579 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1580 }
1581
1582 /* convert an ieee half/binary16 to float */
1583 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1584 ecb_function_ ecb_const float
1585 ecb_binary16_to_float (uint16_t x)
1586 {
1587 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1588 }
1589
1590#endif
1591
1592#endif
1593
1594/* ECB.H END */
1595
1596#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1597/* if your architecture doesn't need memory fences, e.g. because it is
1598 * single-cpu/core, or if you use libev in a project that doesn't use libev
1599 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1600 * libev, in which cases the memory fences become nops.
1601 * alternatively, you can remove this #error and link against libpthread,
1602 * which will then provide the memory fences.
1603 */
1604# error "memory fences not defined for your architecture, please report"
1605#endif
1606
1607#ifndef ECB_MEMORY_FENCE
1608# define ECB_MEMORY_FENCE do { } while (0)
1609# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1610# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1611#endif
1612
490#define inline_size static inline 1613#define inline_size ecb_inline
491 1614
492#if EV_FEATURE_CODE 1615#if EV_FEATURE_CODE
493# define inline_speed static inline 1616# define inline_speed ecb_inline
494#else 1617#else
495# define inline_speed static noinline 1618# define inline_speed ecb_noinline static
496#endif 1619#endif
1620
1621/*****************************************************************************/
1622/* raw syscall wrappers */
1623
1624#if EV_NEED_SYSCALL
1625
1626#include <sys/syscall.h>
1627
1628/*
1629 * define some syscall wrappers for common architectures
1630 * this is mostly for nice looks during debugging, not performance.
1631 * our syscalls return < 0, not == -1, on error. which is good
1632 * enough for linux aio.
1633 * TODO: arm is also common nowadays, maybe even mips and x86
1634 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1635 */
1636#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__
1637 /* the costly errno access probably kills this for size optimisation */
1638
1639 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1640 ({ \
1641 long res; \
1642 register unsigned long r6 __asm__ ("r9" ); \
1643 register unsigned long r5 __asm__ ("r8" ); \
1644 register unsigned long r4 __asm__ ("r10"); \
1645 register unsigned long r3 __asm__ ("rdx"); \
1646 register unsigned long r2 __asm__ ("rsi"); \
1647 register unsigned long r1 __asm__ ("rdi"); \
1648 if (narg >= 6) r6 = (unsigned long)(arg6); \
1649 if (narg >= 5) r5 = (unsigned long)(arg5); \
1650 if (narg >= 4) r4 = (unsigned long)(arg4); \
1651 if (narg >= 3) r3 = (unsigned long)(arg3); \
1652 if (narg >= 2) r2 = (unsigned long)(arg2); \
1653 if (narg >= 1) r1 = (unsigned long)(arg1); \
1654 __asm__ __volatile__ ( \
1655 "syscall\n\t" \
1656 : "=a" (res) \
1657 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1658 : "cc", "r11", "cx", "memory"); \
1659 errno = -res; \
1660 res; \
1661 })
1662
1663#endif
1664
1665#ifdef ev_syscall
1666 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1667 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1668 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1669 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1670 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1671 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1672 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1673#else
1674 #define ev_syscall0(nr) syscall (nr)
1675 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1676 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1677 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1678 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1679 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1680 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1681#endif
1682
1683#endif
1684
1685/*****************************************************************************/
497 1686
498#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1687#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
499 1688
500#if EV_MINPRI == EV_MAXPRI 1689#if EV_MINPRI == EV_MAXPRI
501# define ABSPRI(w) (((W)w), 0) 1690# define ABSPRI(w) (((W)w), 0)
502#else 1691#else
503# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1692# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
504#endif 1693#endif
505 1694
506#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1695#define EMPTY /* required for microsofts broken pseudo-c compiler */
507#define EMPTY2(a,b) /* used to suppress some warnings */
508 1696
509typedef ev_watcher *W; 1697typedef ev_watcher *W;
510typedef ev_watcher_list *WL; 1698typedef ev_watcher_list *WL;
511typedef ev_watcher_time *WT; 1699typedef ev_watcher_time *WT;
512 1700
… …
537# include "ev_win32.c" 1725# include "ev_win32.c"
538#endif 1726#endif
539 1727
540/*****************************************************************************/ 1728/*****************************************************************************/
541 1729
1730#if EV_USE_LINUXAIO
1731# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1732#endif
1733
1734/* define a suitable floor function (only used by periodics atm) */
1735
1736#if EV_USE_FLOOR
1737# include <math.h>
1738# define ev_floor(v) floor (v)
1739#else
1740
1741#include <float.h>
1742
1743/* a floor() replacement function, should be independent of ev_tstamp type */
1744ecb_noinline
1745static ev_tstamp
1746ev_floor (ev_tstamp v)
1747{
1748 /* the choice of shift factor is not terribly important */
1749#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1750 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1751#else
1752 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1753#endif
1754
1755 /* special treatment for negative arguments */
1756 if (ecb_expect_false (v < 0.))
1757 {
1758 ev_tstamp f = -ev_floor (-v);
1759
1760 return f - (f == v ? 0 : 1);
1761 }
1762
1763 /* argument too large for an unsigned long? then reduce it */
1764 if (ecb_expect_false (v >= shift))
1765 {
1766 ev_tstamp f;
1767
1768 if (v == v - 1.)
1769 return v; /* very large numbers are assumed to be integer */
1770
1771 f = shift * ev_floor (v * (1. / shift));
1772 return f + ev_floor (v - f);
1773 }
1774
1775 /* fits into an unsigned long */
1776 return (unsigned long)v;
1777}
1778
1779#endif
1780
1781/*****************************************************************************/
1782
1783#ifdef __linux
1784# include <sys/utsname.h>
1785#endif
1786
1787ecb_noinline ecb_cold
1788static unsigned int
1789ev_linux_version (void)
1790{
1791#ifdef __linux
1792 unsigned int v = 0;
1793 struct utsname buf;
1794 int i;
1795 char *p = buf.release;
1796
1797 if (uname (&buf))
1798 return 0;
1799
1800 for (i = 3+1; --i; )
1801 {
1802 unsigned int c = 0;
1803
1804 for (;;)
1805 {
1806 if (*p >= '0' && *p <= '9')
1807 c = c * 10 + *p++ - '0';
1808 else
1809 {
1810 p += *p == '.';
1811 break;
1812 }
1813 }
1814
1815 v = (v << 8) | c;
1816 }
1817
1818 return v;
1819#else
1820 return 0;
1821#endif
1822}
1823
1824/*****************************************************************************/
1825
542#if EV_AVOID_STDIO 1826#if EV_AVOID_STDIO
543static void noinline 1827ecb_noinline ecb_cold
1828static void
544ev_printerr (const char *msg) 1829ev_printerr (const char *msg)
545{ 1830{
546 write (STDERR_FILENO, msg, strlen (msg)); 1831 write (STDERR_FILENO, msg, strlen (msg));
547} 1832}
548#endif 1833#endif
549 1834
550static void (*syserr_cb)(const char *msg); 1835static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
551 1836
1837ecb_cold
552void 1838void
553ev_set_syserr_cb (void (*cb)(const char *msg)) 1839ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
554{ 1840{
555 syserr_cb = cb; 1841 syserr_cb = cb;
556} 1842}
557 1843
558static void noinline 1844ecb_noinline ecb_cold
1845static void
559ev_syserr (const char *msg) 1846ev_syserr (const char *msg)
560{ 1847{
561 if (!msg) 1848 if (!msg)
562 msg = "(libev) system error"; 1849 msg = "(libev) system error";
563 1850
564 if (syserr_cb) 1851 if (syserr_cb)
565 syserr_cb (msg); 1852 syserr_cb (msg);
566 else 1853 else
567 { 1854 {
568#if EV_AVOID_STDIO 1855#if EV_AVOID_STDIO
569 const char *err = strerror (errno);
570
571 ev_printerr (msg); 1856 ev_printerr (msg);
572 ev_printerr (": "); 1857 ev_printerr (": ");
573 ev_printerr (err); 1858 ev_printerr (strerror (errno));
574 ev_printerr ("\n"); 1859 ev_printerr ("\n");
575#else 1860#else
576 perror (msg); 1861 perror (msg);
577#endif 1862#endif
578 abort (); 1863 abort ();
579 } 1864 }
580} 1865}
581 1866
582static void * 1867static void *
583ev_realloc_emul (void *ptr, long size) 1868ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
584{ 1869{
585#if __GLIBC__
586 return realloc (ptr, size);
587#else
588 /* some systems, notably openbsd and darwin, fail to properly 1870 /* some systems, notably openbsd and darwin, fail to properly
589 * implement realloc (x, 0) (as required by both ansi c-89 and 1871 * implement realloc (x, 0) (as required by both ansi c-89 and
590 * the single unix specification, so work around them here. 1872 * the single unix specification, so work around them here.
1873 * recently, also (at least) fedora and debian started breaking it,
1874 * despite documenting it otherwise.
591 */ 1875 */
592 1876
593 if (size) 1877 if (size)
594 return realloc (ptr, size); 1878 return realloc (ptr, size);
595 1879
596 free (ptr); 1880 free (ptr);
597 return 0; 1881 return 0;
598#endif
599} 1882}
600 1883
601static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1884static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
602 1885
1886ecb_cold
603void 1887void
604ev_set_allocator (void *(*cb)(void *ptr, long size)) 1888ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
605{ 1889{
606 alloc = cb; 1890 alloc = cb;
607} 1891}
608 1892
609inline_speed void * 1893inline_speed void *
… …
612 ptr = alloc (ptr, size); 1896 ptr = alloc (ptr, size);
613 1897
614 if (!ptr && size) 1898 if (!ptr && size)
615 { 1899 {
616#if EV_AVOID_STDIO 1900#if EV_AVOID_STDIO
617 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1901 ev_printerr ("(libev) memory allocation failed, aborting.\n");
618#else 1902#else
619 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1903 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
620#endif 1904#endif
621 abort (); 1905 abort ();
622 } 1906 }
623 1907
624 return ptr; 1908 return ptr;
… …
636typedef struct 1920typedef struct
637{ 1921{
638 WL head; 1922 WL head;
639 unsigned char events; /* the events watched for */ 1923 unsigned char events; /* the events watched for */
640 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1924 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
641 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1925 unsigned char emask; /* some backends store the actual kernel mask in here */
642 unsigned char unused; 1926 unsigned char eflags; /* flags field for use by backends */
643#if EV_USE_EPOLL 1927#if EV_USE_EPOLL
644 unsigned int egen; /* generation counter to counter epoll bugs */ 1928 unsigned int egen; /* generation counter to counter epoll bugs */
645#endif 1929#endif
646#if EV_SELECT_IS_WINSOCKET 1930#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
647 SOCKET handle; 1931 SOCKET handle;
1932#endif
1933#if EV_USE_IOCP
1934 OVERLAPPED or, ow;
648#endif 1935#endif
649} ANFD; 1936} ANFD;
650 1937
651/* stores the pending event set for a given watcher */ 1938/* stores the pending event set for a given watcher */
652typedef struct 1939typedef struct
… …
694 #undef VAR 1981 #undef VAR
695 }; 1982 };
696 #include "ev_wrap.h" 1983 #include "ev_wrap.h"
697 1984
698 static struct ev_loop default_loop_struct; 1985 static struct ev_loop default_loop_struct;
699 struct ev_loop *ev_default_loop_ptr; 1986 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
700 1987
701#else 1988#else
702 1989
703 ev_tstamp ev_rt_now; 1990 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
704 #define VAR(name,decl) static decl; 1991 #define VAR(name,decl) static decl;
705 #include "ev_vars.h" 1992 #include "ev_vars.h"
706 #undef VAR 1993 #undef VAR
707 1994
708 static int ev_default_loop_ptr; 1995 static int ev_default_loop_ptr;
709 1996
710#endif 1997#endif
711 1998
712#if EV_FEATURE_API 1999#if EV_FEATURE_API
713# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 2000# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
714# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 2001# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
715# define EV_INVOKE_PENDING invoke_cb (EV_A) 2002# define EV_INVOKE_PENDING invoke_cb (EV_A)
716#else 2003#else
717# define EV_RELEASE_CB (void)0 2004# define EV_RELEASE_CB (void)0
718# define EV_ACQUIRE_CB (void)0 2005# define EV_ACQUIRE_CB (void)0
719# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2006# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
720#endif 2007#endif
721 2008
722#define EVUNLOOP_RECURSE 0x80 2009#define EVBREAK_RECURSE 0x80
723 2010
724/*****************************************************************************/ 2011/*****************************************************************************/
725 2012
726#ifndef EV_HAVE_EV_TIME 2013#ifndef EV_HAVE_EV_TIME
727ev_tstamp 2014ev_tstamp
728ev_time (void) 2015ev_time (void) EV_NOEXCEPT
729{ 2016{
730#if EV_USE_REALTIME 2017#if EV_USE_REALTIME
731 if (expect_true (have_realtime)) 2018 if (ecb_expect_true (have_realtime))
732 { 2019 {
733 struct timespec ts; 2020 struct timespec ts;
734 clock_gettime (CLOCK_REALTIME, &ts); 2021 clock_gettime (CLOCK_REALTIME, &ts);
735 return ts.tv_sec + ts.tv_nsec * 1e-9; 2022 return EV_TS_GET (ts);
736 } 2023 }
737#endif 2024#endif
738 2025
2026 {
739 struct timeval tv; 2027 struct timeval tv;
740 gettimeofday (&tv, 0); 2028 gettimeofday (&tv, 0);
741 return tv.tv_sec + tv.tv_usec * 1e-6; 2029 return EV_TV_GET (tv);
2030 }
742} 2031}
743#endif 2032#endif
744 2033
745inline_size ev_tstamp 2034inline_size ev_tstamp
746get_clock (void) 2035get_clock (void)
747{ 2036{
748#if EV_USE_MONOTONIC 2037#if EV_USE_MONOTONIC
749 if (expect_true (have_monotonic)) 2038 if (ecb_expect_true (have_monotonic))
750 { 2039 {
751 struct timespec ts; 2040 struct timespec ts;
752 clock_gettime (CLOCK_MONOTONIC, &ts); 2041 clock_gettime (CLOCK_MONOTONIC, &ts);
753 return ts.tv_sec + ts.tv_nsec * 1e-9; 2042 return EV_TS_GET (ts);
754 } 2043 }
755#endif 2044#endif
756 2045
757 return ev_time (); 2046 return ev_time ();
758} 2047}
759 2048
760#if EV_MULTIPLICITY 2049#if EV_MULTIPLICITY
761ev_tstamp 2050ev_tstamp
762ev_now (EV_P) 2051ev_now (EV_P) EV_NOEXCEPT
763{ 2052{
764 return ev_rt_now; 2053 return ev_rt_now;
765} 2054}
766#endif 2055#endif
767 2056
768void 2057void
769ev_sleep (ev_tstamp delay) 2058ev_sleep (ev_tstamp delay) EV_NOEXCEPT
770{ 2059{
771 if (delay > 0.) 2060 if (delay > EV_TS_CONST (0.))
772 { 2061 {
773#if EV_USE_NANOSLEEP 2062#if EV_USE_NANOSLEEP
774 struct timespec ts; 2063 struct timespec ts;
775 2064
776 EV_TS_SET (ts, delay); 2065 EV_TS_SET (ts, delay);
777 nanosleep (&ts, 0); 2066 nanosleep (&ts, 0);
778#elif defined(_WIN32) 2067#elif defined _WIN32
2068 /* maybe this should round up, as ms is very low resolution */
2069 /* compared to select (µs) or nanosleep (ns) */
779 Sleep ((unsigned long)(delay * 1e3)); 2070 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
780#else 2071#else
781 struct timeval tv; 2072 struct timeval tv;
782 2073
783 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2074 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
784 /* something not guaranteed by newer posix versions, but guaranteed */ 2075 /* something not guaranteed by newer posix versions, but guaranteed */
… …
802 2093
803 do 2094 do
804 ncur <<= 1; 2095 ncur <<= 1;
805 while (cnt > ncur); 2096 while (cnt > ncur);
806 2097
807 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 2098 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
808 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2099 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
809 { 2100 {
810 ncur *= elem; 2101 ncur *= elem;
811 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 2102 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
812 ncur = ncur - sizeof (void *) * 4; 2103 ncur = ncur - sizeof (void *) * 4;
… …
814 } 2105 }
815 2106
816 return ncur; 2107 return ncur;
817} 2108}
818 2109
819static noinline void * 2110ecb_noinline ecb_cold
2111static void *
820array_realloc (int elem, void *base, int *cur, int cnt) 2112array_realloc (int elem, void *base, int *cur, int cnt)
821{ 2113{
822 *cur = array_nextsize (elem, *cur, cnt); 2114 *cur = array_nextsize (elem, *cur, cnt);
823 return ev_realloc (base, elem * *cur); 2115 return ev_realloc (base, elem * *cur);
824} 2116}
825 2117
2118#define array_needsize_noinit(base,offset,count)
2119
826#define array_init_zero(base,count) \ 2120#define array_needsize_zerofill(base,offset,count) \
827 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2121 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
828 2122
829#define array_needsize(type,base,cur,cnt,init) \ 2123#define array_needsize(type,base,cur,cnt,init) \
830 if (expect_false ((cnt) > (cur))) \ 2124 if (ecb_expect_false ((cnt) > (cur))) \
831 { \ 2125 { \
832 int ocur_ = (cur); \ 2126 ecb_unused int ocur_ = (cur); \
833 (base) = (type *)array_realloc \ 2127 (base) = (type *)array_realloc \
834 (sizeof (type), (base), &(cur), (cnt)); \ 2128 (sizeof (type), (base), &(cur), (cnt)); \
835 init ((base) + (ocur_), (cur) - ocur_); \ 2129 init ((base), ocur_, ((cur) - ocur_)); \
836 } 2130 }
837 2131
838#if 0 2132#if 0
839#define array_slim(type,stem) \ 2133#define array_slim(type,stem) \
840 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2134 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
849 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2143 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
850 2144
851/*****************************************************************************/ 2145/*****************************************************************************/
852 2146
853/* dummy callback for pending events */ 2147/* dummy callback for pending events */
854static void noinline 2148ecb_noinline
2149static void
855pendingcb (EV_P_ ev_prepare *w, int revents) 2150pendingcb (EV_P_ ev_prepare *w, int revents)
856{ 2151{
857} 2152}
858 2153
859void noinline 2154ecb_noinline
2155void
860ev_feed_event (EV_P_ void *w, int revents) 2156ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
861{ 2157{
862 W w_ = (W)w; 2158 W w_ = (W)w;
863 int pri = ABSPRI (w_); 2159 int pri = ABSPRI (w_);
864 2160
865 if (expect_false (w_->pending)) 2161 if (ecb_expect_false (w_->pending))
866 pendings [pri][w_->pending - 1].events |= revents; 2162 pendings [pri][w_->pending - 1].events |= revents;
867 else 2163 else
868 { 2164 {
869 w_->pending = ++pendingcnt [pri]; 2165 w_->pending = ++pendingcnt [pri];
870 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2166 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
871 pendings [pri][w_->pending - 1].w = w_; 2167 pendings [pri][w_->pending - 1].w = w_;
872 pendings [pri][w_->pending - 1].events = revents; 2168 pendings [pri][w_->pending - 1].events = revents;
873 } 2169 }
2170
2171 pendingpri = NUMPRI - 1;
874} 2172}
875 2173
876inline_speed void 2174inline_speed void
877feed_reverse (EV_P_ W w) 2175feed_reverse (EV_P_ W w)
878{ 2176{
879 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2177 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
880 rfeeds [rfeedcnt++] = w; 2178 rfeeds [rfeedcnt++] = w;
881} 2179}
882 2180
883inline_size void 2181inline_size void
884feed_reverse_done (EV_P_ int revents) 2182feed_reverse_done (EV_P_ int revents)
… …
919inline_speed void 2217inline_speed void
920fd_event (EV_P_ int fd, int revents) 2218fd_event (EV_P_ int fd, int revents)
921{ 2219{
922 ANFD *anfd = anfds + fd; 2220 ANFD *anfd = anfds + fd;
923 2221
924 if (expect_true (!anfd->reify)) 2222 if (ecb_expect_true (!anfd->reify))
925 fd_event_nocheck (EV_A_ fd, revents); 2223 fd_event_nocheck (EV_A_ fd, revents);
926} 2224}
927 2225
928void 2226void
929ev_feed_fd_event (EV_P_ int fd, int revents) 2227ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
930{ 2228{
931 if (fd >= 0 && fd < anfdmax) 2229 if (fd >= 0 && fd < anfdmax)
932 fd_event_nocheck (EV_A_ fd, revents); 2230 fd_event_nocheck (EV_A_ fd, revents);
933} 2231}
934 2232
… …
937inline_size void 2235inline_size void
938fd_reify (EV_P) 2236fd_reify (EV_P)
939{ 2237{
940 int i; 2238 int i;
941 2239
2240#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2241 for (i = 0; i < fdchangecnt; ++i)
2242 {
2243 int fd = fdchanges [i];
2244 ANFD *anfd = anfds + fd;
2245
2246 if (anfd->reify & EV__IOFDSET && anfd->head)
2247 {
2248 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2249
2250 if (handle != anfd->handle)
2251 {
2252 unsigned long arg;
2253
2254 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2255
2256 /* handle changed, but fd didn't - we need to do it in two steps */
2257 backend_modify (EV_A_ fd, anfd->events, 0);
2258 anfd->events = 0;
2259 anfd->handle = handle;
2260 }
2261 }
2262 }
2263#endif
2264
942 for (i = 0; i < fdchangecnt; ++i) 2265 for (i = 0; i < fdchangecnt; ++i)
943 { 2266 {
944 int fd = fdchanges [i]; 2267 int fd = fdchanges [i];
945 ANFD *anfd = anfds + fd; 2268 ANFD *anfd = anfds + fd;
946 ev_io *w; 2269 ev_io *w;
947 2270
948 unsigned char o_events = anfd->events; 2271 unsigned char o_events = anfd->events;
949 unsigned char o_reify = anfd->reify; 2272 unsigned char o_reify = anfd->reify;
950 2273
951 anfd->reify = 0; 2274 anfd->reify = 0;
952 2275
953#if EV_SELECT_IS_WINSOCKET
954 if (o_reify & EV__IOFDSET)
955 {
956 unsigned long arg;
957 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
958 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
959 }
960#endif
961
962 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2276 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
963 { 2277 {
964 anfd->events = 0; 2278 anfd->events = 0;
965 2279
966 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2280 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
967 anfd->events |= (unsigned char)w->events; 2281 anfd->events |= (unsigned char)w->events;
… …
976 2290
977 fdchangecnt = 0; 2291 fdchangecnt = 0;
978} 2292}
979 2293
980/* something about the given fd changed */ 2294/* something about the given fd changed */
981inline_size void 2295inline_size
2296void
982fd_change (EV_P_ int fd, int flags) 2297fd_change (EV_P_ int fd, int flags)
983{ 2298{
984 unsigned char reify = anfds [fd].reify; 2299 unsigned char reify = anfds [fd].reify;
985 anfds [fd].reify |= flags; 2300 anfds [fd].reify |= flags;
986 2301
987 if (expect_true (!reify)) 2302 if (ecb_expect_true (!reify))
988 { 2303 {
989 ++fdchangecnt; 2304 ++fdchangecnt;
990 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2305 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
991 fdchanges [fdchangecnt - 1] = fd; 2306 fdchanges [fdchangecnt - 1] = fd;
992 } 2307 }
993} 2308}
994 2309
995/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2310/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
996inline_speed void 2311inline_speed ecb_cold void
997fd_kill (EV_P_ int fd) 2312fd_kill (EV_P_ int fd)
998{ 2313{
999 ev_io *w; 2314 ev_io *w;
1000 2315
1001 while ((w = (ev_io *)anfds [fd].head)) 2316 while ((w = (ev_io *)anfds [fd].head))
… …
1004 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2319 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1005 } 2320 }
1006} 2321}
1007 2322
1008/* check whether the given fd is actually valid, for error recovery */ 2323/* check whether the given fd is actually valid, for error recovery */
1009inline_size int 2324inline_size ecb_cold int
1010fd_valid (int fd) 2325fd_valid (int fd)
1011{ 2326{
1012#ifdef _WIN32 2327#ifdef _WIN32
1013 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2328 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1014#else 2329#else
1015 return fcntl (fd, F_GETFD) != -1; 2330 return fcntl (fd, F_GETFD) != -1;
1016#endif 2331#endif
1017} 2332}
1018 2333
1019/* called on EBADF to verify fds */ 2334/* called on EBADF to verify fds */
1020static void noinline 2335ecb_noinline ecb_cold
2336static void
1021fd_ebadf (EV_P) 2337fd_ebadf (EV_P)
1022{ 2338{
1023 int fd; 2339 int fd;
1024 2340
1025 for (fd = 0; fd < anfdmax; ++fd) 2341 for (fd = 0; fd < anfdmax; ++fd)
… …
1027 if (!fd_valid (fd) && errno == EBADF) 2343 if (!fd_valid (fd) && errno == EBADF)
1028 fd_kill (EV_A_ fd); 2344 fd_kill (EV_A_ fd);
1029} 2345}
1030 2346
1031/* called on ENOMEM in select/poll to kill some fds and retry */ 2347/* called on ENOMEM in select/poll to kill some fds and retry */
1032static void noinline 2348ecb_noinline ecb_cold
2349static void
1033fd_enomem (EV_P) 2350fd_enomem (EV_P)
1034{ 2351{
1035 int fd; 2352 int fd;
1036 2353
1037 for (fd = anfdmax; fd--; ) 2354 for (fd = anfdmax; fd--; )
… …
1041 break; 2358 break;
1042 } 2359 }
1043} 2360}
1044 2361
1045/* usually called after fork if backend needs to re-arm all fds from scratch */ 2362/* usually called after fork if backend needs to re-arm all fds from scratch */
1046static void noinline 2363ecb_noinline
2364static void
1047fd_rearm_all (EV_P) 2365fd_rearm_all (EV_P)
1048{ 2366{
1049 int fd; 2367 int fd;
1050 2368
1051 for (fd = 0; fd < anfdmax; ++fd) 2369 for (fd = 0; fd < anfdmax; ++fd)
… …
1104 ev_tstamp minat; 2422 ev_tstamp minat;
1105 ANHE *minpos; 2423 ANHE *minpos;
1106 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2424 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1107 2425
1108 /* find minimum child */ 2426 /* find minimum child */
1109 if (expect_true (pos + DHEAP - 1 < E)) 2427 if (ecb_expect_true (pos + DHEAP - 1 < E))
1110 { 2428 {
1111 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2429 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1112 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2430 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1113 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2431 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1114 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2432 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1115 } 2433 }
1116 else if (pos < E) 2434 else if (pos < E)
1117 { 2435 {
1118 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2436 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1119 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2437 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1120 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2438 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1121 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2439 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1122 } 2440 }
1123 else 2441 else
1124 break; 2442 break;
1125 2443
1126 if (ANHE_at (he) <= minat) 2444 if (ANHE_at (he) <= minat)
… …
1134 2452
1135 heap [k] = he; 2453 heap [k] = he;
1136 ev_active (ANHE_w (he)) = k; 2454 ev_active (ANHE_w (he)) = k;
1137} 2455}
1138 2456
1139#else /* 4HEAP */ 2457#else /* not 4HEAP */
1140 2458
1141#define HEAP0 1 2459#define HEAP0 1
1142#define HPARENT(k) ((k) >> 1) 2460#define HPARENT(k) ((k) >> 1)
1143#define UPHEAP_DONE(p,k) (!(p)) 2461#define UPHEAP_DONE(p,k) (!(p))
1144 2462
… …
1232 2550
1233/*****************************************************************************/ 2551/*****************************************************************************/
1234 2552
1235#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2553#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1236 2554
1237static void noinline 2555ecb_noinline ecb_cold
2556static void
1238evpipe_init (EV_P) 2557evpipe_init (EV_P)
1239{ 2558{
1240 if (!ev_is_active (&pipe_w)) 2559 if (!ev_is_active (&pipe_w))
1241 { 2560 {
2561 int fds [2];
2562
1242# if EV_USE_EVENTFD 2563# if EV_USE_EVENTFD
2564 fds [0] = -1;
1243 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2565 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1244 if (evfd < 0 && errno == EINVAL) 2566 if (fds [1] < 0 && errno == EINVAL)
1245 evfd = eventfd (0, 0); 2567 fds [1] = eventfd (0, 0);
1246 2568
1247 if (evfd >= 0) 2569 if (fds [1] < 0)
2570# endif
1248 { 2571 {
2572 while (pipe (fds))
2573 ev_syserr ("(libev) error creating signal/async pipe");
2574
2575 fd_intern (fds [0]);
2576 }
2577
1249 evpipe [0] = -1; 2578 evpipe [0] = fds [0];
1250 fd_intern (evfd); /* doing it twice doesn't hurt */ 2579
1251 ev_io_set (&pipe_w, evfd, EV_READ); 2580 if (evpipe [1] < 0)
2581 evpipe [1] = fds [1]; /* first call, set write fd */
2582 else
2583 {
2584 /* on subsequent calls, do not change evpipe [1] */
2585 /* so that evpipe_write can always rely on its value. */
2586 /* this branch does not do anything sensible on windows, */
2587 /* so must not be executed on windows */
2588
2589 dup2 (fds [1], evpipe [1]);
2590 close (fds [1]);
2591 }
2592
2593 fd_intern (evpipe [1]);
2594
2595 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2596 ev_io_start (EV_A_ &pipe_w);
2597 ev_unref (EV_A); /* watcher should not keep loop alive */
2598 }
2599}
2600
2601inline_speed void
2602evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2603{
2604 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2605
2606 if (ecb_expect_true (*flag))
2607 return;
2608
2609 *flag = 1;
2610 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2611
2612 pipe_write_skipped = 1;
2613
2614 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2615
2616 if (pipe_write_wanted)
2617 {
2618 int old_errno;
2619
2620 pipe_write_skipped = 0;
2621 ECB_MEMORY_FENCE_RELEASE;
2622
2623 old_errno = errno; /* save errno because write will clobber it */
2624
2625#if EV_USE_EVENTFD
2626 if (evpipe [0] < 0)
2627 {
2628 uint64_t counter = 1;
2629 write (evpipe [1], &counter, sizeof (uint64_t));
1252 } 2630 }
1253 else 2631 else
1254# endif 2632#endif
1255 { 2633 {
1256 while (pipe (evpipe)) 2634#ifdef _WIN32
1257 ev_syserr ("(libev) error creating signal/async pipe"); 2635 WSABUF buf;
1258 2636 DWORD sent;
1259 fd_intern (evpipe [0]); 2637 buf.buf = (char *)&buf;
1260 fd_intern (evpipe [1]); 2638 buf.len = 1;
1261 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2639 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2640#else
2641 write (evpipe [1], &(evpipe [1]), 1);
2642#endif
1262 } 2643 }
1263
1264 ev_io_start (EV_A_ &pipe_w);
1265 ev_unref (EV_A); /* watcher should not keep loop alive */
1266 }
1267}
1268
1269inline_size void
1270evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1271{
1272 if (!*flag)
1273 {
1274 int old_errno = errno; /* save errno because write might clobber it */
1275 char dummy;
1276
1277 *flag = 1;
1278
1279#if EV_USE_EVENTFD
1280 if (evfd >= 0)
1281 {
1282 uint64_t counter = 1;
1283 write (evfd, &counter, sizeof (uint64_t));
1284 }
1285 else
1286#endif
1287 /* win32 people keep sending patches that change this write() to send() */
1288 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1289 /* so when you think this write should be a send instead, please find out */
1290 /* where your send() is from - it's definitely not the microsoft send, and */
1291 /* tell me. thank you. */
1292 write (evpipe [1], &dummy, 1);
1293 2644
1294 errno = old_errno; 2645 errno = old_errno;
1295 } 2646 }
1296} 2647}
1297 2648
… …
1300static void 2651static void
1301pipecb (EV_P_ ev_io *iow, int revents) 2652pipecb (EV_P_ ev_io *iow, int revents)
1302{ 2653{
1303 int i; 2654 int i;
1304 2655
2656 if (revents & EV_READ)
2657 {
1305#if EV_USE_EVENTFD 2658#if EV_USE_EVENTFD
1306 if (evfd >= 0) 2659 if (evpipe [0] < 0)
1307 { 2660 {
1308 uint64_t counter; 2661 uint64_t counter;
1309 read (evfd, &counter, sizeof (uint64_t)); 2662 read (evpipe [1], &counter, sizeof (uint64_t));
1310 } 2663 }
1311 else 2664 else
1312#endif 2665#endif
1313 { 2666 {
1314 char dummy; 2667 char dummy[4];
1315 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2668#ifdef _WIN32
2669 WSABUF buf;
2670 DWORD recvd;
2671 DWORD flags = 0;
2672 buf.buf = dummy;
2673 buf.len = sizeof (dummy);
2674 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2675#else
1316 read (evpipe [0], &dummy, 1); 2676 read (evpipe [0], &dummy, sizeof (dummy));
2677#endif
2678 }
1317 } 2679 }
1318 2680
2681 pipe_write_skipped = 0;
2682
2683 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2684
2685#if EV_SIGNAL_ENABLE
1319 if (sig_pending) 2686 if (sig_pending)
1320 { 2687 {
1321 sig_pending = 0; 2688 sig_pending = 0;
1322 2689
2690 ECB_MEMORY_FENCE;
2691
1323 for (i = EV_NSIG - 1; i--; ) 2692 for (i = EV_NSIG - 1; i--; )
1324 if (expect_false (signals [i].pending)) 2693 if (ecb_expect_false (signals [i].pending))
1325 ev_feed_signal_event (EV_A_ i + 1); 2694 ev_feed_signal_event (EV_A_ i + 1);
1326 } 2695 }
2696#endif
1327 2697
1328#if EV_ASYNC_ENABLE 2698#if EV_ASYNC_ENABLE
1329 if (async_pending) 2699 if (async_pending)
1330 { 2700 {
1331 async_pending = 0; 2701 async_pending = 0;
2702
2703 ECB_MEMORY_FENCE;
1332 2704
1333 for (i = asynccnt; i--; ) 2705 for (i = asynccnt; i--; )
1334 if (asyncs [i]->sent) 2706 if (asyncs [i]->sent)
1335 { 2707 {
1336 asyncs [i]->sent = 0; 2708 asyncs [i]->sent = 0;
2709 ECB_MEMORY_FENCE_RELEASE;
1337 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2710 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1338 } 2711 }
1339 } 2712 }
1340#endif 2713#endif
1341} 2714}
1342 2715
1343/*****************************************************************************/ 2716/*****************************************************************************/
1344 2717
2718void
2719ev_feed_signal (int signum) EV_NOEXCEPT
2720{
2721#if EV_MULTIPLICITY
2722 EV_P;
2723 ECB_MEMORY_FENCE_ACQUIRE;
2724 EV_A = signals [signum - 1].loop;
2725
2726 if (!EV_A)
2727 return;
2728#endif
2729
2730 signals [signum - 1].pending = 1;
2731 evpipe_write (EV_A_ &sig_pending);
2732}
2733
1345static void 2734static void
1346ev_sighandler (int signum) 2735ev_sighandler (int signum)
1347{ 2736{
1348#if EV_MULTIPLICITY
1349 EV_P = signals [signum - 1].loop;
1350#endif
1351
1352#ifdef _WIN32 2737#ifdef _WIN32
1353 signal (signum, ev_sighandler); 2738 signal (signum, ev_sighandler);
1354#endif 2739#endif
1355 2740
1356 signals [signum - 1].pending = 1; 2741 ev_feed_signal (signum);
1357 evpipe_write (EV_A_ &sig_pending);
1358} 2742}
1359 2743
1360void noinline 2744ecb_noinline
2745void
1361ev_feed_signal_event (EV_P_ int signum) 2746ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1362{ 2747{
1363 WL w; 2748 WL w;
1364 2749
1365 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2750 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1366 return; 2751 return;
1367 2752
1368 --signum; 2753 --signum;
1369 2754
1370#if EV_MULTIPLICITY 2755#if EV_MULTIPLICITY
1371 /* it is permissible to try to feed a signal to the wrong loop */ 2756 /* it is permissible to try to feed a signal to the wrong loop */
1372 /* or, likely more useful, feeding a signal nobody is waiting for */ 2757 /* or, likely more useful, feeding a signal nobody is waiting for */
1373 2758
1374 if (expect_false (signals [signum].loop != EV_A)) 2759 if (ecb_expect_false (signals [signum].loop != EV_A))
1375 return; 2760 return;
1376#endif 2761#endif
1377 2762
1378 signals [signum].pending = 0; 2763 signals [signum].pending = 0;
2764 ECB_MEMORY_FENCE_RELEASE;
1379 2765
1380 for (w = signals [signum].head; w; w = w->next) 2766 for (w = signals [signum].head; w; w = w->next)
1381 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2767 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1382} 2768}
1383 2769
… …
1462 2848
1463#endif 2849#endif
1464 2850
1465/*****************************************************************************/ 2851/*****************************************************************************/
1466 2852
2853#if EV_USE_IOCP
2854# include "ev_iocp.c"
2855#endif
1467#if EV_USE_PORT 2856#if EV_USE_PORT
1468# include "ev_port.c" 2857# include "ev_port.c"
1469#endif 2858#endif
1470#if EV_USE_KQUEUE 2859#if EV_USE_KQUEUE
1471# include "ev_kqueue.c" 2860# include "ev_kqueue.c"
1472#endif 2861#endif
1473#if EV_USE_EPOLL 2862#if EV_USE_EPOLL
1474# include "ev_epoll.c" 2863# include "ev_epoll.c"
1475#endif 2864#endif
2865#if EV_USE_LINUXAIO
2866# include "ev_linuxaio.c"
2867#endif
2868#if EV_USE_IOURING
2869# include "ev_iouring.c"
2870#endif
1476#if EV_USE_POLL 2871#if EV_USE_POLL
1477# include "ev_poll.c" 2872# include "ev_poll.c"
1478#endif 2873#endif
1479#if EV_USE_SELECT 2874#if EV_USE_SELECT
1480# include "ev_select.c" 2875# include "ev_select.c"
1481#endif 2876#endif
1482 2877
1483int 2878ecb_cold int
1484ev_version_major (void) 2879ev_version_major (void) EV_NOEXCEPT
1485{ 2880{
1486 return EV_VERSION_MAJOR; 2881 return EV_VERSION_MAJOR;
1487} 2882}
1488 2883
1489int 2884ecb_cold int
1490ev_version_minor (void) 2885ev_version_minor (void) EV_NOEXCEPT
1491{ 2886{
1492 return EV_VERSION_MINOR; 2887 return EV_VERSION_MINOR;
1493} 2888}
1494 2889
1495/* return true if we are running with elevated privileges and should ignore env variables */ 2890/* return true if we are running with elevated privileges and should ignore env variables */
1496int inline_size 2891inline_size ecb_cold int
1497enable_secure (void) 2892enable_secure (void)
1498{ 2893{
1499#ifdef _WIN32 2894#ifdef _WIN32
1500 return 0; 2895 return 0;
1501#else 2896#else
1502 return getuid () != geteuid () 2897 return getuid () != geteuid ()
1503 || getgid () != getegid (); 2898 || getgid () != getegid ();
1504#endif 2899#endif
1505} 2900}
1506 2901
2902ecb_cold
1507unsigned int 2903unsigned int
1508ev_supported_backends (void) 2904ev_supported_backends (void) EV_NOEXCEPT
1509{ 2905{
1510 unsigned int flags = 0; 2906 unsigned int flags = 0;
1511 2907
1512 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2908 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1513 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2909 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1514 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2910 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2911 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
2912 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING;
1515 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2913 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1516 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2914 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1517 2915
1518 return flags; 2916 return flags;
1519} 2917}
1520 2918
2919ecb_cold
1521unsigned int 2920unsigned int
1522ev_recommended_backends (void) 2921ev_recommended_backends (void) EV_NOEXCEPT
1523{ 2922{
1524 unsigned int flags = ev_supported_backends (); 2923 unsigned int flags = ev_supported_backends ();
1525 2924
1526#ifndef __NetBSD__ 2925#ifndef __NetBSD__
1527 /* kqueue is borked on everything but netbsd apparently */ 2926 /* kqueue is borked on everything but netbsd apparently */
… …
1535#endif 2934#endif
1536#ifdef __FreeBSD__ 2935#ifdef __FreeBSD__
1537 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2936 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1538#endif 2937#endif
1539 2938
2939 /* TODO: linuxaio is very experimental */
2940#if !EV_RECOMMEND_LINUXAIO
2941 flags &= ~EVBACKEND_LINUXAIO;
2942#endif
2943 /* TODO: linuxaio is super experimental */
2944#if !EV_RECOMMEND_IOURING
2945 flags &= ~EVBACKEND_IOURING;
2946#endif
2947
1540 return flags; 2948 return flags;
1541} 2949}
1542 2950
2951ecb_cold
1543unsigned int 2952unsigned int
1544ev_embeddable_backends (void) 2953ev_embeddable_backends (void) EV_NOEXCEPT
1545{ 2954{
1546 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2955 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1547 2956
1548 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2957 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1549 /* please fix it and tell me how to detect the fix */ 2958 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1550 flags &= ~EVBACKEND_EPOLL; 2959 flags &= ~EVBACKEND_EPOLL;
2960
2961 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
2962
2963 /* EVBACKEND_IOURING is practically embeddable, but the current implementation is not
2964 * because our backend_fd is the epoll fd we need as fallback.
2965 * if the kernel ever is fixed, this might change...
2966 */
1551 2967
1552 return flags; 2968 return flags;
1553} 2969}
1554 2970
1555unsigned int 2971unsigned int
1556ev_backend (EV_P) 2972ev_backend (EV_P) EV_NOEXCEPT
1557{ 2973{
1558 return backend; 2974 return backend;
1559} 2975}
1560 2976
1561#if EV_FEATURE_API 2977#if EV_FEATURE_API
1562unsigned int 2978unsigned int
1563ev_iteration (EV_P) 2979ev_iteration (EV_P) EV_NOEXCEPT
1564{ 2980{
1565 return loop_count; 2981 return loop_count;
1566} 2982}
1567 2983
1568unsigned int 2984unsigned int
1569ev_depth (EV_P) 2985ev_depth (EV_P) EV_NOEXCEPT
1570{ 2986{
1571 return loop_depth; 2987 return loop_depth;
1572} 2988}
1573 2989
1574void 2990void
1575ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2991ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1576{ 2992{
1577 io_blocktime = interval; 2993 io_blocktime = interval;
1578} 2994}
1579 2995
1580void 2996void
1581ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2997ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1582{ 2998{
1583 timeout_blocktime = interval; 2999 timeout_blocktime = interval;
1584} 3000}
1585 3001
1586void 3002void
1587ev_set_userdata (EV_P_ void *data) 3003ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1588{ 3004{
1589 userdata = data; 3005 userdata = data;
1590} 3006}
1591 3007
1592void * 3008void *
1593ev_userdata (EV_P) 3009ev_userdata (EV_P) EV_NOEXCEPT
1594{ 3010{
1595 return userdata; 3011 return userdata;
1596} 3012}
1597 3013
3014void
1598void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 3015ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1599{ 3016{
1600 invoke_cb = invoke_pending_cb; 3017 invoke_cb = invoke_pending_cb;
1601} 3018}
1602 3019
3020void
1603void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 3021ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1604{ 3022{
1605 release_cb = release; 3023 release_cb = release;
1606 acquire_cb = acquire; 3024 acquire_cb = acquire;
1607} 3025}
1608#endif 3026#endif
1609 3027
1610/* initialise a loop structure, must be zero-initialised */ 3028/* initialise a loop structure, must be zero-initialised */
1611static void noinline 3029ecb_noinline ecb_cold
3030static void
1612loop_init (EV_P_ unsigned int flags) 3031loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1613{ 3032{
1614 if (!backend) 3033 if (!backend)
1615 { 3034 {
3035 origflags = flags;
3036
1616#if EV_USE_REALTIME 3037#if EV_USE_REALTIME
1617 if (!have_realtime) 3038 if (!have_realtime)
1618 { 3039 {
1619 struct timespec ts; 3040 struct timespec ts;
1620 3041
… …
1642 if (!(flags & EVFLAG_NOENV) 3063 if (!(flags & EVFLAG_NOENV)
1643 && !enable_secure () 3064 && !enable_secure ()
1644 && getenv ("LIBEV_FLAGS")) 3065 && getenv ("LIBEV_FLAGS"))
1645 flags = atoi (getenv ("LIBEV_FLAGS")); 3066 flags = atoi (getenv ("LIBEV_FLAGS"));
1646 3067
1647 ev_rt_now = ev_time (); 3068 ev_rt_now = ev_time ();
1648 mn_now = get_clock (); 3069 mn_now = get_clock ();
1649 now_floor = mn_now; 3070 now_floor = mn_now;
1650 rtmn_diff = ev_rt_now - mn_now; 3071 rtmn_diff = ev_rt_now - mn_now;
1651#if EV_FEATURE_API 3072#if EV_FEATURE_API
1652 invoke_cb = ev_invoke_pending; 3073 invoke_cb = ev_invoke_pending;
1653#endif 3074#endif
1654 3075
1655 io_blocktime = 0.; 3076 io_blocktime = 0.;
1656 timeout_blocktime = 0.; 3077 timeout_blocktime = 0.;
1657 backend = 0; 3078 backend = 0;
1658 backend_fd = -1; 3079 backend_fd = -1;
1659 sig_pending = 0; 3080 sig_pending = 0;
1660#if EV_ASYNC_ENABLE 3081#if EV_ASYNC_ENABLE
1661 async_pending = 0; 3082 async_pending = 0;
1662#endif 3083#endif
3084 pipe_write_skipped = 0;
3085 pipe_write_wanted = 0;
3086 evpipe [0] = -1;
3087 evpipe [1] = -1;
1663#if EV_USE_INOTIFY 3088#if EV_USE_INOTIFY
1664 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3089 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1665#endif 3090#endif
1666#if EV_USE_SIGNALFD 3091#if EV_USE_SIGNALFD
1667 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3092 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1668#endif 3093#endif
1669 3094
1670 if (!(flags & 0x0000ffffU)) 3095 if (!(flags & EVBACKEND_MASK))
1671 flags |= ev_recommended_backends (); 3096 flags |= ev_recommended_backends ();
1672 3097
3098#if EV_USE_IOCP
3099 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3100#endif
1673#if EV_USE_PORT 3101#if EV_USE_PORT
1674 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3102 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1675#endif 3103#endif
1676#if EV_USE_KQUEUE 3104#if EV_USE_KQUEUE
1677 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3105 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3106#endif
3107#if EV_USE_IOURING
3108 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3109#endif
3110#if EV_USE_LINUXAIO
3111 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1678#endif 3112#endif
1679#if EV_USE_EPOLL 3113#if EV_USE_EPOLL
1680 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3114 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1681#endif 3115#endif
1682#if EV_USE_POLL 3116#if EV_USE_POLL
1683 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3117 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1684#endif 3118#endif
1685#if EV_USE_SELECT 3119#if EV_USE_SELECT
1686 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3120 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1687#endif 3121#endif
1688 3122
1689 ev_prepare_init (&pending_w, pendingcb); 3123 ev_prepare_init (&pending_w, pendingcb);
1690 3124
1691#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3125#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1694#endif 3128#endif
1695 } 3129 }
1696} 3130}
1697 3131
1698/* free up a loop structure */ 3132/* free up a loop structure */
1699static void noinline 3133ecb_cold
3134void
1700loop_destroy (EV_P) 3135ev_loop_destroy (EV_P)
1701{ 3136{
1702 int i; 3137 int i;
3138
3139#if EV_MULTIPLICITY
3140 /* mimic free (0) */
3141 if (!EV_A)
3142 return;
3143#endif
3144
3145#if EV_CLEANUP_ENABLE
3146 /* queue cleanup watchers (and execute them) */
3147 if (ecb_expect_false (cleanupcnt))
3148 {
3149 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3150 EV_INVOKE_PENDING;
3151 }
3152#endif
3153
3154#if EV_CHILD_ENABLE
3155 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3156 {
3157 ev_ref (EV_A); /* child watcher */
3158 ev_signal_stop (EV_A_ &childev);
3159 }
3160#endif
1703 3161
1704 if (ev_is_active (&pipe_w)) 3162 if (ev_is_active (&pipe_w))
1705 { 3163 {
1706 /*ev_ref (EV_A);*/ 3164 /*ev_ref (EV_A);*/
1707 /*ev_io_stop (EV_A_ &pipe_w);*/ 3165 /*ev_io_stop (EV_A_ &pipe_w);*/
1708 3166
1709#if EV_USE_EVENTFD
1710 if (evfd >= 0)
1711 close (evfd);
1712#endif
1713
1714 if (evpipe [0] >= 0)
1715 {
1716 EV_WIN32_CLOSE_FD (evpipe [0]); 3167 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1717 EV_WIN32_CLOSE_FD (evpipe [1]); 3168 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1718 }
1719 } 3169 }
1720 3170
1721#if EV_USE_SIGNALFD 3171#if EV_USE_SIGNALFD
1722 if (ev_is_active (&sigfd_w)) 3172 if (ev_is_active (&sigfd_w))
1723 close (sigfd); 3173 close (sigfd);
… …
1729#endif 3179#endif
1730 3180
1731 if (backend_fd >= 0) 3181 if (backend_fd >= 0)
1732 close (backend_fd); 3182 close (backend_fd);
1733 3183
3184#if EV_USE_IOCP
3185 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3186#endif
1734#if EV_USE_PORT 3187#if EV_USE_PORT
1735 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3188 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1736#endif 3189#endif
1737#if EV_USE_KQUEUE 3190#if EV_USE_KQUEUE
1738 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3191 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3192#endif
3193#if EV_USE_IOURING
3194 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3195#endif
3196#if EV_USE_LINUXAIO
3197 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1739#endif 3198#endif
1740#if EV_USE_EPOLL 3199#if EV_USE_EPOLL
1741 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3200 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1742#endif 3201#endif
1743#if EV_USE_POLL 3202#if EV_USE_POLL
1744 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3203 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1745#endif 3204#endif
1746#if EV_USE_SELECT 3205#if EV_USE_SELECT
1747 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3206 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1748#endif 3207#endif
1749 3208
1750 for (i = NUMPRI; i--; ) 3209 for (i = NUMPRI; i--; )
1751 { 3210 {
1752 array_free (pending, [i]); 3211 array_free (pending, [i]);
… …
1765 array_free (periodic, EMPTY); 3224 array_free (periodic, EMPTY);
1766#endif 3225#endif
1767#if EV_FORK_ENABLE 3226#if EV_FORK_ENABLE
1768 array_free (fork, EMPTY); 3227 array_free (fork, EMPTY);
1769#endif 3228#endif
3229#if EV_CLEANUP_ENABLE
3230 array_free (cleanup, EMPTY);
3231#endif
1770 array_free (prepare, EMPTY); 3232 array_free (prepare, EMPTY);
1771 array_free (check, EMPTY); 3233 array_free (check, EMPTY);
1772#if EV_ASYNC_ENABLE 3234#if EV_ASYNC_ENABLE
1773 array_free (async, EMPTY); 3235 array_free (async, EMPTY);
1774#endif 3236#endif
1775 3237
1776 backend = 0; 3238 backend = 0;
3239
3240#if EV_MULTIPLICITY
3241 if (ev_is_default_loop (EV_A))
3242#endif
3243 ev_default_loop_ptr = 0;
3244#if EV_MULTIPLICITY
3245 else
3246 ev_free (EV_A);
3247#endif
1777} 3248}
1778 3249
1779#if EV_USE_INOTIFY 3250#if EV_USE_INOTIFY
1780inline_size void infy_fork (EV_P); 3251inline_size void infy_fork (EV_P);
1781#endif 3252#endif
1782 3253
1783inline_size void 3254inline_size void
1784loop_fork (EV_P) 3255loop_fork (EV_P)
1785{ 3256{
1786#if EV_USE_PORT 3257#if EV_USE_PORT
1787 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3258 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1788#endif 3259#endif
1789#if EV_USE_KQUEUE 3260#if EV_USE_KQUEUE
1790 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3261 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3262#endif
3263#if EV_USE_IOURING
3264 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3265#endif
3266#if EV_USE_LINUXAIO
3267 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1791#endif 3268#endif
1792#if EV_USE_EPOLL 3269#if EV_USE_EPOLL
1793 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3270 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1794#endif 3271#endif
1795#if EV_USE_INOTIFY 3272#if EV_USE_INOTIFY
1796 infy_fork (EV_A); 3273 infy_fork (EV_A);
1797#endif 3274#endif
1798 3275
3276#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1799 if (ev_is_active (&pipe_w)) 3277 if (ev_is_active (&pipe_w) && postfork != 2)
1800 { 3278 {
1801 /* this "locks" the handlers against writing to the pipe */ 3279 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1802 /* while we modify the fd vars */
1803 sig_pending = 1;
1804#if EV_ASYNC_ENABLE
1805 async_pending = 1;
1806#endif
1807 3280
1808 ev_ref (EV_A); 3281 ev_ref (EV_A);
1809 ev_io_stop (EV_A_ &pipe_w); 3282 ev_io_stop (EV_A_ &pipe_w);
1810 3283
1811#if EV_USE_EVENTFD
1812 if (evfd >= 0)
1813 close (evfd);
1814#endif
1815
1816 if (evpipe [0] >= 0) 3284 if (evpipe [0] >= 0)
1817 {
1818 EV_WIN32_CLOSE_FD (evpipe [0]); 3285 EV_WIN32_CLOSE_FD (evpipe [0]);
1819 EV_WIN32_CLOSE_FD (evpipe [1]);
1820 }
1821 3286
1822#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1823 evpipe_init (EV_A); 3287 evpipe_init (EV_A);
1824 /* now iterate over everything, in case we missed something */ 3288 /* iterate over everything, in case we missed something before */
1825 pipecb (EV_A_ &pipe_w, EV_READ); 3289 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1826#endif
1827 } 3290 }
3291#endif
1828 3292
1829 postfork = 0; 3293 postfork = 0;
1830} 3294}
1831 3295
1832#if EV_MULTIPLICITY 3296#if EV_MULTIPLICITY
1833 3297
3298ecb_cold
1834struct ev_loop * 3299struct ev_loop *
1835ev_loop_new (unsigned int flags) 3300ev_loop_new (unsigned int flags) EV_NOEXCEPT
1836{ 3301{
1837 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3302 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1838 3303
1839 memset (EV_A, 0, sizeof (struct ev_loop)); 3304 memset (EV_A, 0, sizeof (struct ev_loop));
1840 loop_init (EV_A_ flags); 3305 loop_init (EV_A_ flags);
1841 3306
1842 if (ev_backend (EV_A)) 3307 if (ev_backend (EV_A))
1843 return EV_A; 3308 return EV_A;
1844 3309
3310 ev_free (EV_A);
1845 return 0; 3311 return 0;
1846} 3312}
1847 3313
1848void
1849ev_loop_destroy (EV_P)
1850{
1851 loop_destroy (EV_A);
1852 ev_free (loop);
1853}
1854
1855void
1856ev_loop_fork (EV_P)
1857{
1858 postfork = 1; /* must be in line with ev_default_fork */
1859}
1860#endif /* multiplicity */ 3314#endif /* multiplicity */
1861 3315
1862#if EV_VERIFY 3316#if EV_VERIFY
1863static void noinline 3317ecb_noinline ecb_cold
3318static void
1864verify_watcher (EV_P_ W w) 3319verify_watcher (EV_P_ W w)
1865{ 3320{
1866 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3321 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1867 3322
1868 if (w->pending) 3323 if (w->pending)
1869 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3324 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1870} 3325}
1871 3326
1872static void noinline 3327ecb_noinline ecb_cold
3328static void
1873verify_heap (EV_P_ ANHE *heap, int N) 3329verify_heap (EV_P_ ANHE *heap, int N)
1874{ 3330{
1875 int i; 3331 int i;
1876 3332
1877 for (i = HEAP0; i < N + HEAP0; ++i) 3333 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1882 3338
1883 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3339 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1884 } 3340 }
1885} 3341}
1886 3342
1887static void noinline 3343ecb_noinline ecb_cold
3344static void
1888array_verify (EV_P_ W *ws, int cnt) 3345array_verify (EV_P_ W *ws, int cnt)
1889{ 3346{
1890 while (cnt--) 3347 while (cnt--)
1891 { 3348 {
1892 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3349 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1894 } 3351 }
1895} 3352}
1896#endif 3353#endif
1897 3354
1898#if EV_FEATURE_API 3355#if EV_FEATURE_API
1899void 3356void ecb_cold
1900ev_verify (EV_P) 3357ev_verify (EV_P) EV_NOEXCEPT
1901{ 3358{
1902#if EV_VERIFY 3359#if EV_VERIFY
1903 int i; 3360 int i;
1904 WL w; 3361 WL w, w2;
1905 3362
1906 assert (activecnt >= -1); 3363 assert (activecnt >= -1);
1907 3364
1908 assert (fdchangemax >= fdchangecnt); 3365 assert (fdchangemax >= fdchangecnt);
1909 for (i = 0; i < fdchangecnt; ++i) 3366 for (i = 0; i < fdchangecnt; ++i)
1910 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3367 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1911 3368
1912 assert (anfdmax >= 0); 3369 assert (anfdmax >= 0);
1913 for (i = 0; i < anfdmax; ++i) 3370 for (i = 0; i < anfdmax; ++i)
3371 {
3372 int j = 0;
3373
1914 for (w = anfds [i].head; w; w = w->next) 3374 for (w = w2 = anfds [i].head; w; w = w->next)
1915 { 3375 {
1916 verify_watcher (EV_A_ (W)w); 3376 verify_watcher (EV_A_ (W)w);
3377
3378 if (j++ & 1)
3379 {
3380 assert (("libev: io watcher list contains a loop", w != w2));
3381 w2 = w2->next;
3382 }
3383
1917 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3384 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1918 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3385 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1919 } 3386 }
3387 }
1920 3388
1921 assert (timermax >= timercnt); 3389 assert (timermax >= timercnt);
1922 verify_heap (EV_A_ timers, timercnt); 3390 verify_heap (EV_A_ timers, timercnt);
1923 3391
1924#if EV_PERIODIC_ENABLE 3392#if EV_PERIODIC_ENABLE
… …
1939#if EV_FORK_ENABLE 3407#if EV_FORK_ENABLE
1940 assert (forkmax >= forkcnt); 3408 assert (forkmax >= forkcnt);
1941 array_verify (EV_A_ (W *)forks, forkcnt); 3409 array_verify (EV_A_ (W *)forks, forkcnt);
1942#endif 3410#endif
1943 3411
3412#if EV_CLEANUP_ENABLE
3413 assert (cleanupmax >= cleanupcnt);
3414 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3415#endif
3416
1944#if EV_ASYNC_ENABLE 3417#if EV_ASYNC_ENABLE
1945 assert (asyncmax >= asynccnt); 3418 assert (asyncmax >= asynccnt);
1946 array_verify (EV_A_ (W *)asyncs, asynccnt); 3419 array_verify (EV_A_ (W *)asyncs, asynccnt);
1947#endif 3420#endif
1948 3421
… …
1965#endif 3438#endif
1966} 3439}
1967#endif 3440#endif
1968 3441
1969#if EV_MULTIPLICITY 3442#if EV_MULTIPLICITY
3443ecb_cold
1970struct ev_loop * 3444struct ev_loop *
1971ev_default_loop_init (unsigned int flags)
1972#else 3445#else
1973int 3446int
3447#endif
1974ev_default_loop (unsigned int flags) 3448ev_default_loop (unsigned int flags) EV_NOEXCEPT
1975#endif
1976{ 3449{
1977 if (!ev_default_loop_ptr) 3450 if (!ev_default_loop_ptr)
1978 { 3451 {
1979#if EV_MULTIPLICITY 3452#if EV_MULTIPLICITY
1980 EV_P = ev_default_loop_ptr = &default_loop_struct; 3453 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1999 3472
2000 return ev_default_loop_ptr; 3473 return ev_default_loop_ptr;
2001} 3474}
2002 3475
2003void 3476void
2004ev_default_destroy (void) 3477ev_loop_fork (EV_P) EV_NOEXCEPT
2005{ 3478{
2006#if EV_MULTIPLICITY 3479 postfork = 1;
2007 EV_P = ev_default_loop_ptr;
2008#endif
2009
2010 ev_default_loop_ptr = 0;
2011
2012#if EV_CHILD_ENABLE
2013 ev_ref (EV_A); /* child watcher */
2014 ev_signal_stop (EV_A_ &childev);
2015#endif
2016
2017 loop_destroy (EV_A);
2018}
2019
2020void
2021ev_default_fork (void)
2022{
2023#if EV_MULTIPLICITY
2024 EV_P = ev_default_loop_ptr;
2025#endif
2026
2027 postfork = 1; /* must be in line with ev_loop_fork */
2028} 3480}
2029 3481
2030/*****************************************************************************/ 3482/*****************************************************************************/
2031 3483
2032void 3484void
… …
2034{ 3486{
2035 EV_CB_INVOKE ((W)w, revents); 3487 EV_CB_INVOKE ((W)w, revents);
2036} 3488}
2037 3489
2038unsigned int 3490unsigned int
2039ev_pending_count (EV_P) 3491ev_pending_count (EV_P) EV_NOEXCEPT
2040{ 3492{
2041 int pri; 3493 int pri;
2042 unsigned int count = 0; 3494 unsigned int count = 0;
2043 3495
2044 for (pri = NUMPRI; pri--; ) 3496 for (pri = NUMPRI; pri--; )
2045 count += pendingcnt [pri]; 3497 count += pendingcnt [pri];
2046 3498
2047 return count; 3499 return count;
2048} 3500}
2049 3501
2050void noinline 3502ecb_noinline
3503void
2051ev_invoke_pending (EV_P) 3504ev_invoke_pending (EV_P)
2052{ 3505{
2053 int pri; 3506 pendingpri = NUMPRI;
2054 3507
2055 for (pri = NUMPRI; pri--; ) 3508 do
3509 {
3510 --pendingpri;
3511
3512 /* pendingpri possibly gets modified in the inner loop */
2056 while (pendingcnt [pri]) 3513 while (pendingcnt [pendingpri])
2057 { 3514 {
2058 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3515 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2059 3516
2060 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2061 /* ^ this is no longer true, as pending_w could be here */
2062
2063 p->w->pending = 0; 3517 p->w->pending = 0;
2064 EV_CB_INVOKE (p->w, p->events); 3518 EV_CB_INVOKE (p->w, p->events);
2065 EV_FREQUENT_CHECK; 3519 EV_FREQUENT_CHECK;
2066 } 3520 }
3521 }
3522 while (pendingpri);
2067} 3523}
2068 3524
2069#if EV_IDLE_ENABLE 3525#if EV_IDLE_ENABLE
2070/* make idle watchers pending. this handles the "call-idle */ 3526/* make idle watchers pending. this handles the "call-idle */
2071/* only when higher priorities are idle" logic */ 3527/* only when higher priorities are idle" logic */
2072inline_size void 3528inline_size void
2073idle_reify (EV_P) 3529idle_reify (EV_P)
2074{ 3530{
2075 if (expect_false (idleall)) 3531 if (ecb_expect_false (idleall))
2076 { 3532 {
2077 int pri; 3533 int pri;
2078 3534
2079 for (pri = NUMPRI; pri--; ) 3535 for (pri = NUMPRI; pri--; )
2080 { 3536 {
… …
2110 { 3566 {
2111 ev_at (w) += w->repeat; 3567 ev_at (w) += w->repeat;
2112 if (ev_at (w) < mn_now) 3568 if (ev_at (w) < mn_now)
2113 ev_at (w) = mn_now; 3569 ev_at (w) = mn_now;
2114 3570
2115 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3571 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
2116 3572
2117 ANHE_at_cache (timers [HEAP0]); 3573 ANHE_at_cache (timers [HEAP0]);
2118 downheap (timers, timercnt, HEAP0); 3574 downheap (timers, timercnt, HEAP0);
2119 } 3575 }
2120 else 3576 else
… …
2128 feed_reverse_done (EV_A_ EV_TIMER); 3584 feed_reverse_done (EV_A_ EV_TIMER);
2129 } 3585 }
2130} 3586}
2131 3587
2132#if EV_PERIODIC_ENABLE 3588#if EV_PERIODIC_ENABLE
3589
3590ecb_noinline
3591static void
3592periodic_recalc (EV_P_ ev_periodic *w)
3593{
3594 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3595 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3596
3597 /* the above almost always errs on the low side */
3598 while (at <= ev_rt_now)
3599 {
3600 ev_tstamp nat = at + w->interval;
3601
3602 /* when resolution fails us, we use ev_rt_now */
3603 if (ecb_expect_false (nat == at))
3604 {
3605 at = ev_rt_now;
3606 break;
3607 }
3608
3609 at = nat;
3610 }
3611
3612 ev_at (w) = at;
3613}
3614
2133/* make periodics pending */ 3615/* make periodics pending */
2134inline_size void 3616inline_size void
2135periodics_reify (EV_P) 3617periodics_reify (EV_P)
2136{ 3618{
2137 EV_FREQUENT_CHECK; 3619 EV_FREQUENT_CHECK;
2138 3620
2139 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3621 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2140 { 3622 {
2141 int feed_count = 0;
2142
2143 do 3623 do
2144 { 3624 {
2145 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3625 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2146 3626
2147 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3627 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2156 ANHE_at_cache (periodics [HEAP0]); 3636 ANHE_at_cache (periodics [HEAP0]);
2157 downheap (periodics, periodiccnt, HEAP0); 3637 downheap (periodics, periodiccnt, HEAP0);
2158 } 3638 }
2159 else if (w->interval) 3639 else if (w->interval)
2160 { 3640 {
2161 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3641 periodic_recalc (EV_A_ w);
2162 /* if next trigger time is not sufficiently in the future, put it there */
2163 /* this might happen because of floating point inexactness */
2164 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2165 {
2166 ev_at (w) += w->interval;
2167
2168 /* if interval is unreasonably low we might still have a time in the past */
2169 /* so correct this. this will make the periodic very inexact, but the user */
2170 /* has effectively asked to get triggered more often than possible */
2171 if (ev_at (w) < ev_rt_now)
2172 ev_at (w) = ev_rt_now;
2173 }
2174
2175 ANHE_at_cache (periodics [HEAP0]); 3642 ANHE_at_cache (periodics [HEAP0]);
2176 downheap (periodics, periodiccnt, HEAP0); 3643 downheap (periodics, periodiccnt, HEAP0);
2177 } 3644 }
2178 else 3645 else
2179 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3646 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2187 } 3654 }
2188} 3655}
2189 3656
2190/* simply recalculate all periodics */ 3657/* simply recalculate all periodics */
2191/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3658/* TODO: maybe ensure that at least one event happens when jumping forward? */
2192static void noinline 3659ecb_noinline ecb_cold
3660static void
2193periodics_reschedule (EV_P) 3661periodics_reschedule (EV_P)
2194{ 3662{
2195 int i; 3663 int i;
2196 3664
2197 /* adjust periodics after time jump */ 3665 /* adjust periodics after time jump */
… …
2200 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3668 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2201 3669
2202 if (w->reschedule_cb) 3670 if (w->reschedule_cb)
2203 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3671 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2204 else if (w->interval) 3672 else if (w->interval)
2205 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3673 periodic_recalc (EV_A_ w);
2206 3674
2207 ANHE_at_cache (periodics [i]); 3675 ANHE_at_cache (periodics [i]);
2208 } 3676 }
2209 3677
2210 reheap (periodics, periodiccnt); 3678 reheap (periodics, periodiccnt);
2211} 3679}
2212#endif 3680#endif
2213 3681
2214/* adjust all timers by a given offset */ 3682/* adjust all timers by a given offset */
2215static void noinline 3683ecb_noinline ecb_cold
3684static void
2216timers_reschedule (EV_P_ ev_tstamp adjust) 3685timers_reschedule (EV_P_ ev_tstamp adjust)
2217{ 3686{
2218 int i; 3687 int i;
2219 3688
2220 for (i = 0; i < timercnt; ++i) 3689 for (i = 0; i < timercnt; ++i)
… …
2229/* also detect if there was a timejump, and act accordingly */ 3698/* also detect if there was a timejump, and act accordingly */
2230inline_speed void 3699inline_speed void
2231time_update (EV_P_ ev_tstamp max_block) 3700time_update (EV_P_ ev_tstamp max_block)
2232{ 3701{
2233#if EV_USE_MONOTONIC 3702#if EV_USE_MONOTONIC
2234 if (expect_true (have_monotonic)) 3703 if (ecb_expect_true (have_monotonic))
2235 { 3704 {
2236 int i; 3705 int i;
2237 ev_tstamp odiff = rtmn_diff; 3706 ev_tstamp odiff = rtmn_diff;
2238 3707
2239 mn_now = get_clock (); 3708 mn_now = get_clock ();
2240 3709
2241 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3710 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2242 /* interpolate in the meantime */ 3711 /* interpolate in the meantime */
2243 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3712 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
2244 { 3713 {
2245 ev_rt_now = rtmn_diff + mn_now; 3714 ev_rt_now = rtmn_diff + mn_now;
2246 return; 3715 return;
2247 } 3716 }
2248 3717
… …
2257 * doesn't hurt either as we only do this on time-jumps or 3726 * doesn't hurt either as we only do this on time-jumps or
2258 * in the unlikely event of having been preempted here. 3727 * in the unlikely event of having been preempted here.
2259 */ 3728 */
2260 for (i = 4; --i; ) 3729 for (i = 4; --i; )
2261 { 3730 {
3731 ev_tstamp diff;
2262 rtmn_diff = ev_rt_now - mn_now; 3732 rtmn_diff = ev_rt_now - mn_now;
2263 3733
2264 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3734 diff = odiff - rtmn_diff;
3735
3736 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
2265 return; /* all is well */ 3737 return; /* all is well */
2266 3738
2267 ev_rt_now = ev_time (); 3739 ev_rt_now = ev_time ();
2268 mn_now = get_clock (); 3740 mn_now = get_clock ();
2269 now_floor = mn_now; 3741 now_floor = mn_now;
… …
2278 else 3750 else
2279#endif 3751#endif
2280 { 3752 {
2281 ev_rt_now = ev_time (); 3753 ev_rt_now = ev_time ();
2282 3754
2283 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3755 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
2284 { 3756 {
2285 /* adjust timers. this is easy, as the offset is the same for all of them */ 3757 /* adjust timers. this is easy, as the offset is the same for all of them */
2286 timers_reschedule (EV_A_ ev_rt_now - mn_now); 3758 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2287#if EV_PERIODIC_ENABLE 3759#if EV_PERIODIC_ENABLE
2288 periodics_reschedule (EV_A); 3760 periodics_reschedule (EV_A);
… …
2291 3763
2292 mn_now = ev_rt_now; 3764 mn_now = ev_rt_now;
2293 } 3765 }
2294} 3766}
2295 3767
2296void 3768int
2297ev_loop (EV_P_ int flags) 3769ev_run (EV_P_ int flags)
2298{ 3770{
2299#if EV_FEATURE_API 3771#if EV_FEATURE_API
2300 ++loop_depth; 3772 ++loop_depth;
2301#endif 3773#endif
2302 3774
2303 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 3775 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2304 3776
2305 loop_done = EVUNLOOP_CANCEL; 3777 loop_done = EVBREAK_CANCEL;
2306 3778
2307 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 3779 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2308 3780
2309 do 3781 do
2310 { 3782 {
2311#if EV_VERIFY >= 2 3783#if EV_VERIFY >= 2
2312 ev_verify (EV_A); 3784 ev_verify (EV_A);
2313#endif 3785#endif
2314 3786
2315#ifndef _WIN32 3787#ifndef _WIN32
2316 if (expect_false (curpid)) /* penalise the forking check even more */ 3788 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2317 if (expect_false (getpid () != curpid)) 3789 if (ecb_expect_false (getpid () != curpid))
2318 { 3790 {
2319 curpid = getpid (); 3791 curpid = getpid ();
2320 postfork = 1; 3792 postfork = 1;
2321 } 3793 }
2322#endif 3794#endif
2323 3795
2324#if EV_FORK_ENABLE 3796#if EV_FORK_ENABLE
2325 /* we might have forked, so queue fork handlers */ 3797 /* we might have forked, so queue fork handlers */
2326 if (expect_false (postfork)) 3798 if (ecb_expect_false (postfork))
2327 if (forkcnt) 3799 if (forkcnt)
2328 { 3800 {
2329 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3801 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2330 EV_INVOKE_PENDING; 3802 EV_INVOKE_PENDING;
2331 } 3803 }
2332#endif 3804#endif
2333 3805
2334#if EV_PREPARE_ENABLE 3806#if EV_PREPARE_ENABLE
2335 /* queue prepare watchers (and execute them) */ 3807 /* queue prepare watchers (and execute them) */
2336 if (expect_false (preparecnt)) 3808 if (ecb_expect_false (preparecnt))
2337 { 3809 {
2338 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3810 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2339 EV_INVOKE_PENDING; 3811 EV_INVOKE_PENDING;
2340 } 3812 }
2341#endif 3813#endif
2342 3814
2343 if (expect_false (loop_done)) 3815 if (ecb_expect_false (loop_done))
2344 break; 3816 break;
2345 3817
2346 /* we might have forked, so reify kernel state if necessary */ 3818 /* we might have forked, so reify kernel state if necessary */
2347 if (expect_false (postfork)) 3819 if (ecb_expect_false (postfork))
2348 loop_fork (EV_A); 3820 loop_fork (EV_A);
2349 3821
2350 /* update fd-related kernel structures */ 3822 /* update fd-related kernel structures */
2351 fd_reify (EV_A); 3823 fd_reify (EV_A);
2352 3824
2353 /* calculate blocking time */ 3825 /* calculate blocking time */
2354 { 3826 {
2355 ev_tstamp waittime = 0.; 3827 ev_tstamp waittime = 0.;
2356 ev_tstamp sleeptime = 0.; 3828 ev_tstamp sleeptime = 0.;
2357 3829
3830 /* remember old timestamp for io_blocktime calculation */
3831 ev_tstamp prev_mn_now = mn_now;
3832
3833 /* update time to cancel out callback processing overhead */
3834 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
3835
3836 /* from now on, we want a pipe-wake-up */
3837 pipe_write_wanted = 1;
3838
3839 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3840
2358 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3841 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2359 { 3842 {
2360 /* remember old timestamp for io_blocktime calculation */
2361 ev_tstamp prev_mn_now = mn_now;
2362
2363 /* update time to cancel out callback processing overhead */
2364 time_update (EV_A_ 1e100);
2365
2366 waittime = MAX_BLOCKTIME; 3843 waittime = EV_TS_CONST (MAX_BLOCKTIME);
2367 3844
2368 if (timercnt) 3845 if (timercnt)
2369 { 3846 {
2370 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3847 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2371 if (waittime > to) waittime = to; 3848 if (waittime > to) waittime = to;
2372 } 3849 }
2373 3850
2374#if EV_PERIODIC_ENABLE 3851#if EV_PERIODIC_ENABLE
2375 if (periodiccnt) 3852 if (periodiccnt)
2376 { 3853 {
2377 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3854 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2378 if (waittime > to) waittime = to; 3855 if (waittime > to) waittime = to;
2379 } 3856 }
2380#endif 3857#endif
2381 3858
2382 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3859 /* don't let timeouts decrease the waittime below timeout_blocktime */
2383 if (expect_false (waittime < timeout_blocktime)) 3860 if (ecb_expect_false (waittime < timeout_blocktime))
2384 waittime = timeout_blocktime; 3861 waittime = timeout_blocktime;
2385 3862
3863 /* now there are two more special cases left, either we have
3864 * already-expired timers, so we should not sleep, or we have timers
3865 * that expire very soon, in which case we need to weait for a minimum
3866 * amount of time for some event loop backends
3867 */
3868 if (ecb_expect_false (waittime < backend_mintime))
3869 waittime = waittime <= EV_TS_CONST (0.)
3870 ? EV_TS_CONST (0.)
3871 : backend_mintime;
3872
2386 /* extra check because io_blocktime is commonly 0 */ 3873 /* extra check because io_blocktime is commonly 0 */
2387 if (expect_false (io_blocktime)) 3874 if (ecb_expect_false (io_blocktime))
2388 { 3875 {
2389 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3876 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2390 3877
2391 if (sleeptime > waittime - backend_fudge) 3878 if (sleeptime > waittime - backend_mintime)
2392 sleeptime = waittime - backend_fudge; 3879 sleeptime = waittime - backend_mintime;
2393 3880
2394 if (expect_true (sleeptime > 0.)) 3881 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2395 { 3882 {
2396 ev_sleep (sleeptime); 3883 ev_sleep (sleeptime);
2397 waittime -= sleeptime; 3884 waittime -= sleeptime;
2398 } 3885 }
2399 } 3886 }
2400 } 3887 }
2401 3888
2402#if EV_FEATURE_API 3889#if EV_FEATURE_API
2403 ++loop_count; 3890 ++loop_count;
2404#endif 3891#endif
2405 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 3892 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2406 backend_poll (EV_A_ waittime); 3893 backend_poll (EV_A_ waittime);
2407 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 3894 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3895
3896 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3897
3898 ECB_MEMORY_FENCE_ACQUIRE;
3899 if (pipe_write_skipped)
3900 {
3901 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3902 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3903 }
2408 3904
2409 /* update ev_rt_now, do magic */ 3905 /* update ev_rt_now, do magic */
2410 time_update (EV_A_ waittime + sleeptime); 3906 time_update (EV_A_ waittime + sleeptime);
2411 } 3907 }
2412 3908
… …
2421 idle_reify (EV_A); 3917 idle_reify (EV_A);
2422#endif 3918#endif
2423 3919
2424#if EV_CHECK_ENABLE 3920#if EV_CHECK_ENABLE
2425 /* queue check watchers, to be executed first */ 3921 /* queue check watchers, to be executed first */
2426 if (expect_false (checkcnt)) 3922 if (ecb_expect_false (checkcnt))
2427 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3923 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2428#endif 3924#endif
2429 3925
2430 EV_INVOKE_PENDING; 3926 EV_INVOKE_PENDING;
2431 } 3927 }
2432 while (expect_true ( 3928 while (ecb_expect_true (
2433 activecnt 3929 activecnt
2434 && !loop_done 3930 && !loop_done
2435 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3931 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2436 )); 3932 ));
2437 3933
2438 if (loop_done == EVUNLOOP_ONE) 3934 if (loop_done == EVBREAK_ONE)
2439 loop_done = EVUNLOOP_CANCEL; 3935 loop_done = EVBREAK_CANCEL;
2440 3936
2441#if EV_FEATURE_API 3937#if EV_FEATURE_API
2442 --loop_depth; 3938 --loop_depth;
2443#endif 3939#endif
2444}
2445 3940
3941 return activecnt;
3942}
3943
2446void 3944void
2447ev_unloop (EV_P_ int how) 3945ev_break (EV_P_ int how) EV_NOEXCEPT
2448{ 3946{
2449 loop_done = how; 3947 loop_done = how;
2450} 3948}
2451 3949
2452void 3950void
2453ev_ref (EV_P) 3951ev_ref (EV_P) EV_NOEXCEPT
2454{ 3952{
2455 ++activecnt; 3953 ++activecnt;
2456} 3954}
2457 3955
2458void 3956void
2459ev_unref (EV_P) 3957ev_unref (EV_P) EV_NOEXCEPT
2460{ 3958{
2461 --activecnt; 3959 --activecnt;
2462} 3960}
2463 3961
2464void 3962void
2465ev_now_update (EV_P) 3963ev_now_update (EV_P) EV_NOEXCEPT
2466{ 3964{
2467 time_update (EV_A_ 1e100); 3965 time_update (EV_A_ EV_TSTAMP_HUGE);
2468} 3966}
2469 3967
2470void 3968void
2471ev_suspend (EV_P) 3969ev_suspend (EV_P) EV_NOEXCEPT
2472{ 3970{
2473 ev_now_update (EV_A); 3971 ev_now_update (EV_A);
2474} 3972}
2475 3973
2476void 3974void
2477ev_resume (EV_P) 3975ev_resume (EV_P) EV_NOEXCEPT
2478{ 3976{
2479 ev_tstamp mn_prev = mn_now; 3977 ev_tstamp mn_prev = mn_now;
2480 3978
2481 ev_now_update (EV_A); 3979 ev_now_update (EV_A);
2482 timers_reschedule (EV_A_ mn_now - mn_prev); 3980 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2499inline_size void 3997inline_size void
2500wlist_del (WL *head, WL elem) 3998wlist_del (WL *head, WL elem)
2501{ 3999{
2502 while (*head) 4000 while (*head)
2503 { 4001 {
2504 if (expect_true (*head == elem)) 4002 if (ecb_expect_true (*head == elem))
2505 { 4003 {
2506 *head = elem->next; 4004 *head = elem->next;
2507 break; 4005 break;
2508 } 4006 }
2509 4007
… …
2521 w->pending = 0; 4019 w->pending = 0;
2522 } 4020 }
2523} 4021}
2524 4022
2525int 4023int
2526ev_clear_pending (EV_P_ void *w) 4024ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2527{ 4025{
2528 W w_ = (W)w; 4026 W w_ = (W)w;
2529 int pending = w_->pending; 4027 int pending = w_->pending;
2530 4028
2531 if (expect_true (pending)) 4029 if (ecb_expect_true (pending))
2532 { 4030 {
2533 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4031 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2534 p->w = (W)&pending_w; 4032 p->w = (W)&pending_w;
2535 w_->pending = 0; 4033 w_->pending = 0;
2536 return p->events; 4034 return p->events;
… …
2563 w->active = 0; 4061 w->active = 0;
2564} 4062}
2565 4063
2566/*****************************************************************************/ 4064/*****************************************************************************/
2567 4065
2568void noinline 4066ecb_noinline
4067void
2569ev_io_start (EV_P_ ev_io *w) 4068ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2570{ 4069{
2571 int fd = w->fd; 4070 int fd = w->fd;
2572 4071
2573 if (expect_false (ev_is_active (w))) 4072 if (ecb_expect_false (ev_is_active (w)))
2574 return; 4073 return;
2575 4074
2576 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4075 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2577 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4076 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2578 4077
4078#if EV_VERIFY >= 2
4079 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4080#endif
2579 EV_FREQUENT_CHECK; 4081 EV_FREQUENT_CHECK;
2580 4082
2581 ev_start (EV_A_ (W)w, 1); 4083 ev_start (EV_A_ (W)w, 1);
2582 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4084 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2583 wlist_add (&anfds[fd].head, (WL)w); 4085 wlist_add (&anfds[fd].head, (WL)w);
4086
4087 /* common bug, apparently */
4088 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2584 4089
2585 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 4090 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2586 w->events &= ~EV__IOFDSET; 4091 w->events &= ~EV__IOFDSET;
2587 4092
2588 EV_FREQUENT_CHECK; 4093 EV_FREQUENT_CHECK;
2589} 4094}
2590 4095
2591void noinline 4096ecb_noinline
4097void
2592ev_io_stop (EV_P_ ev_io *w) 4098ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2593{ 4099{
2594 clear_pending (EV_A_ (W)w); 4100 clear_pending (EV_A_ (W)w);
2595 if (expect_false (!ev_is_active (w))) 4101 if (ecb_expect_false (!ev_is_active (w)))
2596 return; 4102 return;
2597 4103
2598 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4104 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2599 4105
4106#if EV_VERIFY >= 2
4107 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4108#endif
2600 EV_FREQUENT_CHECK; 4109 EV_FREQUENT_CHECK;
2601 4110
2602 wlist_del (&anfds[w->fd].head, (WL)w); 4111 wlist_del (&anfds[w->fd].head, (WL)w);
2603 ev_stop (EV_A_ (W)w); 4112 ev_stop (EV_A_ (W)w);
2604 4113
2605 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 4114 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2606 4115
2607 EV_FREQUENT_CHECK; 4116 EV_FREQUENT_CHECK;
2608} 4117}
2609 4118
2610void noinline 4119ecb_noinline
4120void
2611ev_timer_start (EV_P_ ev_timer *w) 4121ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2612{ 4122{
2613 if (expect_false (ev_is_active (w))) 4123 if (ecb_expect_false (ev_is_active (w)))
2614 return; 4124 return;
2615 4125
2616 ev_at (w) += mn_now; 4126 ev_at (w) += mn_now;
2617 4127
2618 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4128 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2619 4129
2620 EV_FREQUENT_CHECK; 4130 EV_FREQUENT_CHECK;
2621 4131
2622 ++timercnt; 4132 ++timercnt;
2623 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4133 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2624 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4134 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2625 ANHE_w (timers [ev_active (w)]) = (WT)w; 4135 ANHE_w (timers [ev_active (w)]) = (WT)w;
2626 ANHE_at_cache (timers [ev_active (w)]); 4136 ANHE_at_cache (timers [ev_active (w)]);
2627 upheap (timers, ev_active (w)); 4137 upheap (timers, ev_active (w));
2628 4138
2629 EV_FREQUENT_CHECK; 4139 EV_FREQUENT_CHECK;
2630 4140
2631 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4141 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2632} 4142}
2633 4143
2634void noinline 4144ecb_noinline
4145void
2635ev_timer_stop (EV_P_ ev_timer *w) 4146ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2636{ 4147{
2637 clear_pending (EV_A_ (W)w); 4148 clear_pending (EV_A_ (W)w);
2638 if (expect_false (!ev_is_active (w))) 4149 if (ecb_expect_false (!ev_is_active (w)))
2639 return; 4150 return;
2640 4151
2641 EV_FREQUENT_CHECK; 4152 EV_FREQUENT_CHECK;
2642 4153
2643 { 4154 {
… …
2645 4156
2646 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4157 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2647 4158
2648 --timercnt; 4159 --timercnt;
2649 4160
2650 if (expect_true (active < timercnt + HEAP0)) 4161 if (ecb_expect_true (active < timercnt + HEAP0))
2651 { 4162 {
2652 timers [active] = timers [timercnt + HEAP0]; 4163 timers [active] = timers [timercnt + HEAP0];
2653 adjustheap (timers, timercnt, active); 4164 adjustheap (timers, timercnt, active);
2654 } 4165 }
2655 } 4166 }
… …
2659 ev_stop (EV_A_ (W)w); 4170 ev_stop (EV_A_ (W)w);
2660 4171
2661 EV_FREQUENT_CHECK; 4172 EV_FREQUENT_CHECK;
2662} 4173}
2663 4174
2664void noinline 4175ecb_noinline
4176void
2665ev_timer_again (EV_P_ ev_timer *w) 4177ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2666{ 4178{
2667 EV_FREQUENT_CHECK; 4179 EV_FREQUENT_CHECK;
4180
4181 clear_pending (EV_A_ (W)w);
2668 4182
2669 if (ev_is_active (w)) 4183 if (ev_is_active (w))
2670 { 4184 {
2671 if (w->repeat) 4185 if (w->repeat)
2672 { 4186 {
… …
2685 4199
2686 EV_FREQUENT_CHECK; 4200 EV_FREQUENT_CHECK;
2687} 4201}
2688 4202
2689ev_tstamp 4203ev_tstamp
2690ev_timer_remaining (EV_P_ ev_timer *w) 4204ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2691{ 4205{
2692 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4206 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
2693} 4207}
2694 4208
2695#if EV_PERIODIC_ENABLE 4209#if EV_PERIODIC_ENABLE
2696void noinline 4210ecb_noinline
4211void
2697ev_periodic_start (EV_P_ ev_periodic *w) 4212ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2698{ 4213{
2699 if (expect_false (ev_is_active (w))) 4214 if (ecb_expect_false (ev_is_active (w)))
2700 return; 4215 return;
2701 4216
2702 if (w->reschedule_cb) 4217 if (w->reschedule_cb)
2703 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4218 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2704 else if (w->interval) 4219 else if (w->interval)
2705 { 4220 {
2706 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4221 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2707 /* this formula differs from the one in periodic_reify because we do not always round up */ 4222 periodic_recalc (EV_A_ w);
2708 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2709 } 4223 }
2710 else 4224 else
2711 ev_at (w) = w->offset; 4225 ev_at (w) = w->offset;
2712 4226
2713 EV_FREQUENT_CHECK; 4227 EV_FREQUENT_CHECK;
2714 4228
2715 ++periodiccnt; 4229 ++periodiccnt;
2716 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4230 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2717 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4231 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2718 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4232 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2719 ANHE_at_cache (periodics [ev_active (w)]); 4233 ANHE_at_cache (periodics [ev_active (w)]);
2720 upheap (periodics, ev_active (w)); 4234 upheap (periodics, ev_active (w));
2721 4235
2722 EV_FREQUENT_CHECK; 4236 EV_FREQUENT_CHECK;
2723 4237
2724 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4238 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2725} 4239}
2726 4240
2727void noinline 4241ecb_noinline
4242void
2728ev_periodic_stop (EV_P_ ev_periodic *w) 4243ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2729{ 4244{
2730 clear_pending (EV_A_ (W)w); 4245 clear_pending (EV_A_ (W)w);
2731 if (expect_false (!ev_is_active (w))) 4246 if (ecb_expect_false (!ev_is_active (w)))
2732 return; 4247 return;
2733 4248
2734 EV_FREQUENT_CHECK; 4249 EV_FREQUENT_CHECK;
2735 4250
2736 { 4251 {
… …
2738 4253
2739 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4254 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2740 4255
2741 --periodiccnt; 4256 --periodiccnt;
2742 4257
2743 if (expect_true (active < periodiccnt + HEAP0)) 4258 if (ecb_expect_true (active < periodiccnt + HEAP0))
2744 { 4259 {
2745 periodics [active] = periodics [periodiccnt + HEAP0]; 4260 periodics [active] = periodics [periodiccnt + HEAP0];
2746 adjustheap (periodics, periodiccnt, active); 4261 adjustheap (periodics, periodiccnt, active);
2747 } 4262 }
2748 } 4263 }
… …
2750 ev_stop (EV_A_ (W)w); 4265 ev_stop (EV_A_ (W)w);
2751 4266
2752 EV_FREQUENT_CHECK; 4267 EV_FREQUENT_CHECK;
2753} 4268}
2754 4269
2755void noinline 4270ecb_noinline
4271void
2756ev_periodic_again (EV_P_ ev_periodic *w) 4272ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2757{ 4273{
2758 /* TODO: use adjustheap and recalculation */ 4274 /* TODO: use adjustheap and recalculation */
2759 ev_periodic_stop (EV_A_ w); 4275 ev_periodic_stop (EV_A_ w);
2760 ev_periodic_start (EV_A_ w); 4276 ev_periodic_start (EV_A_ w);
2761} 4277}
… …
2765# define SA_RESTART 0 4281# define SA_RESTART 0
2766#endif 4282#endif
2767 4283
2768#if EV_SIGNAL_ENABLE 4284#if EV_SIGNAL_ENABLE
2769 4285
2770void noinline 4286ecb_noinline
4287void
2771ev_signal_start (EV_P_ ev_signal *w) 4288ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2772{ 4289{
2773 if (expect_false (ev_is_active (w))) 4290 if (ecb_expect_false (ev_is_active (w)))
2774 return; 4291 return;
2775 4292
2776 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4293 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2777 4294
2778#if EV_MULTIPLICITY 4295#if EV_MULTIPLICITY
2779 assert (("libev: a signal must not be attached to two different loops", 4296 assert (("libev: a signal must not be attached to two different loops",
2780 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4297 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2781 4298
2782 signals [w->signum - 1].loop = EV_A; 4299 signals [w->signum - 1].loop = EV_A;
4300 ECB_MEMORY_FENCE_RELEASE;
2783#endif 4301#endif
2784 4302
2785 EV_FREQUENT_CHECK; 4303 EV_FREQUENT_CHECK;
2786 4304
2787#if EV_USE_SIGNALFD 4305#if EV_USE_SIGNALFD
… …
2834 sa.sa_handler = ev_sighandler; 4352 sa.sa_handler = ev_sighandler;
2835 sigfillset (&sa.sa_mask); 4353 sigfillset (&sa.sa_mask);
2836 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4354 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2837 sigaction (w->signum, &sa, 0); 4355 sigaction (w->signum, &sa, 0);
2838 4356
4357 if (origflags & EVFLAG_NOSIGMASK)
4358 {
2839 sigemptyset (&sa.sa_mask); 4359 sigemptyset (&sa.sa_mask);
2840 sigaddset (&sa.sa_mask, w->signum); 4360 sigaddset (&sa.sa_mask, w->signum);
2841 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4361 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4362 }
2842#endif 4363#endif
2843 } 4364 }
2844 4365
2845 EV_FREQUENT_CHECK; 4366 EV_FREQUENT_CHECK;
2846} 4367}
2847 4368
2848void noinline 4369ecb_noinline
4370void
2849ev_signal_stop (EV_P_ ev_signal *w) 4371ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2850{ 4372{
2851 clear_pending (EV_A_ (W)w); 4373 clear_pending (EV_A_ (W)w);
2852 if (expect_false (!ev_is_active (w))) 4374 if (ecb_expect_false (!ev_is_active (w)))
2853 return; 4375 return;
2854 4376
2855 EV_FREQUENT_CHECK; 4377 EV_FREQUENT_CHECK;
2856 4378
2857 wlist_del (&signals [w->signum - 1].head, (WL)w); 4379 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
2885#endif 4407#endif
2886 4408
2887#if EV_CHILD_ENABLE 4409#if EV_CHILD_ENABLE
2888 4410
2889void 4411void
2890ev_child_start (EV_P_ ev_child *w) 4412ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2891{ 4413{
2892#if EV_MULTIPLICITY 4414#if EV_MULTIPLICITY
2893 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4415 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2894#endif 4416#endif
2895 if (expect_false (ev_is_active (w))) 4417 if (ecb_expect_false (ev_is_active (w)))
2896 return; 4418 return;
2897 4419
2898 EV_FREQUENT_CHECK; 4420 EV_FREQUENT_CHECK;
2899 4421
2900 ev_start (EV_A_ (W)w, 1); 4422 ev_start (EV_A_ (W)w, 1);
… …
2902 4424
2903 EV_FREQUENT_CHECK; 4425 EV_FREQUENT_CHECK;
2904} 4426}
2905 4427
2906void 4428void
2907ev_child_stop (EV_P_ ev_child *w) 4429ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2908{ 4430{
2909 clear_pending (EV_A_ (W)w); 4431 clear_pending (EV_A_ (W)w);
2910 if (expect_false (!ev_is_active (w))) 4432 if (ecb_expect_false (!ev_is_active (w)))
2911 return; 4433 return;
2912 4434
2913 EV_FREQUENT_CHECK; 4435 EV_FREQUENT_CHECK;
2914 4436
2915 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); 4437 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
… …
2929 4451
2930#define DEF_STAT_INTERVAL 5.0074891 4452#define DEF_STAT_INTERVAL 5.0074891
2931#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4453#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2932#define MIN_STAT_INTERVAL 0.1074891 4454#define MIN_STAT_INTERVAL 0.1074891
2933 4455
2934static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4456ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2935 4457
2936#if EV_USE_INOTIFY 4458#if EV_USE_INOTIFY
2937 4459
2938/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4460/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2939# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4461# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2940 4462
2941static void noinline 4463ecb_noinline
4464static void
2942infy_add (EV_P_ ev_stat *w) 4465infy_add (EV_P_ ev_stat *w)
2943{ 4466{
2944 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); 4467 w->wd = inotify_add_watch (fs_fd, w->path,
4468 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4469 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4470 | IN_DONT_FOLLOW | IN_MASK_ADD);
2945 4471
2946 if (w->wd >= 0) 4472 if (w->wd >= 0)
2947 { 4473 {
2948 struct statfs sfs; 4474 struct statfs sfs;
2949 4475
… …
2953 4479
2954 if (!fs_2625) 4480 if (!fs_2625)
2955 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4481 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2956 else if (!statfs (w->path, &sfs) 4482 else if (!statfs (w->path, &sfs)
2957 && (sfs.f_type == 0x1373 /* devfs */ 4483 && (sfs.f_type == 0x1373 /* devfs */
4484 || sfs.f_type == 0x4006 /* fat */
4485 || sfs.f_type == 0x4d44 /* msdos */
2958 || sfs.f_type == 0xEF53 /* ext2/3 */ 4486 || sfs.f_type == 0xEF53 /* ext2/3 */
4487 || sfs.f_type == 0x72b6 /* jffs2 */
4488 || sfs.f_type == 0x858458f6 /* ramfs */
4489 || sfs.f_type == 0x5346544e /* ntfs */
2959 || sfs.f_type == 0x3153464a /* jfs */ 4490 || sfs.f_type == 0x3153464a /* jfs */
4491 || sfs.f_type == 0x9123683e /* btrfs */
2960 || sfs.f_type == 0x52654973 /* reiser3 */ 4492 || sfs.f_type == 0x52654973 /* reiser3 */
2961 || sfs.f_type == 0x01021994 /* tempfs */ 4493 || sfs.f_type == 0x01021994 /* tmpfs */
2962 || sfs.f_type == 0x58465342 /* xfs */)) 4494 || sfs.f_type == 0x58465342 /* xfs */))
2963 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4495 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2964 else 4496 else
2965 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4497 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2966 } 4498 }
… …
2987 if (!pend || pend == path) 4519 if (!pend || pend == path)
2988 break; 4520 break;
2989 4521
2990 *pend = 0; 4522 *pend = 0;
2991 w->wd = inotify_add_watch (fs_fd, path, mask); 4523 w->wd = inotify_add_watch (fs_fd, path, mask);
2992 } 4524 }
2993 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4525 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2994 } 4526 }
2995 } 4527 }
2996 4528
2997 if (w->wd >= 0) 4529 if (w->wd >= 0)
… …
3001 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4533 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3002 ev_timer_again (EV_A_ &w->timer); 4534 ev_timer_again (EV_A_ &w->timer);
3003 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4535 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3004} 4536}
3005 4537
3006static void noinline 4538ecb_noinline
4539static void
3007infy_del (EV_P_ ev_stat *w) 4540infy_del (EV_P_ ev_stat *w)
3008{ 4541{
3009 int slot; 4542 int slot;
3010 int wd = w->wd; 4543 int wd = w->wd;
3011 4544
… …
3018 4551
3019 /* remove this watcher, if others are watching it, they will rearm */ 4552 /* remove this watcher, if others are watching it, they will rearm */
3020 inotify_rm_watch (fs_fd, wd); 4553 inotify_rm_watch (fs_fd, wd);
3021} 4554}
3022 4555
3023static void noinline 4556ecb_noinline
4557static void
3024infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4558infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3025{ 4559{
3026 if (slot < 0) 4560 if (slot < 0)
3027 /* overflow, need to check for all hash slots */ 4561 /* overflow, need to check for all hash slots */
3028 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4562 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3064 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4598 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3065 ofs += sizeof (struct inotify_event) + ev->len; 4599 ofs += sizeof (struct inotify_event) + ev->len;
3066 } 4600 }
3067} 4601}
3068 4602
3069inline_size unsigned int
3070ev_linux_version (void)
3071{
3072 struct utsname buf;
3073 unsigned int v;
3074 int i;
3075 char *p = buf.release;
3076
3077 if (uname (&buf))
3078 return 0;
3079
3080 for (i = 3+1; --i; )
3081 {
3082 unsigned int c = 0;
3083
3084 for (;;)
3085 {
3086 if (*p >= '0' && *p <= '9')
3087 c = c * 10 + *p++ - '0';
3088 else
3089 {
3090 p += *p == '.';
3091 break;
3092 }
3093 }
3094
3095 v = (v << 8) | c;
3096 }
3097
3098 return v;
3099}
3100
3101inline_size void 4603inline_size ecb_cold
4604void
3102ev_check_2625 (EV_P) 4605ev_check_2625 (EV_P)
3103{ 4606{
3104 /* kernels < 2.6.25 are borked 4607 /* kernels < 2.6.25 are borked
3105 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4608 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3106 */ 4609 */
… …
3111} 4614}
3112 4615
3113inline_size int 4616inline_size int
3114infy_newfd (void) 4617infy_newfd (void)
3115{ 4618{
3116#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4619#if defined IN_CLOEXEC && defined IN_NONBLOCK
3117 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4620 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3118 if (fd >= 0) 4621 if (fd >= 0)
3119 return fd; 4622 return fd;
3120#endif 4623#endif
3121 return inotify_init (); 4624 return inotify_init ();
… …
3196#else 4699#else
3197# define EV_LSTAT(p,b) lstat (p, b) 4700# define EV_LSTAT(p,b) lstat (p, b)
3198#endif 4701#endif
3199 4702
3200void 4703void
3201ev_stat_stat (EV_P_ ev_stat *w) 4704ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3202{ 4705{
3203 if (lstat (w->path, &w->attr) < 0) 4706 if (lstat (w->path, &w->attr) < 0)
3204 w->attr.st_nlink = 0; 4707 w->attr.st_nlink = 0;
3205 else if (!w->attr.st_nlink) 4708 else if (!w->attr.st_nlink)
3206 w->attr.st_nlink = 1; 4709 w->attr.st_nlink = 1;
3207} 4710}
3208 4711
3209static void noinline 4712ecb_noinline
4713static void
3210stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4714stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3211{ 4715{
3212 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4716 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3213 4717
3214 ev_statdata prev = w->attr; 4718 ev_statdata prev = w->attr;
… …
3245 ev_feed_event (EV_A_ w, EV_STAT); 4749 ev_feed_event (EV_A_ w, EV_STAT);
3246 } 4750 }
3247} 4751}
3248 4752
3249void 4753void
3250ev_stat_start (EV_P_ ev_stat *w) 4754ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3251{ 4755{
3252 if (expect_false (ev_is_active (w))) 4756 if (ecb_expect_false (ev_is_active (w)))
3253 return; 4757 return;
3254 4758
3255 ev_stat_stat (EV_A_ w); 4759 ev_stat_stat (EV_A_ w);
3256 4760
3257 if (w->interval < MIN_STAT_INTERVAL && w->interval) 4761 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3276 4780
3277 EV_FREQUENT_CHECK; 4781 EV_FREQUENT_CHECK;
3278} 4782}
3279 4783
3280void 4784void
3281ev_stat_stop (EV_P_ ev_stat *w) 4785ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3282{ 4786{
3283 clear_pending (EV_A_ (W)w); 4787 clear_pending (EV_A_ (W)w);
3284 if (expect_false (!ev_is_active (w))) 4788 if (ecb_expect_false (!ev_is_active (w)))
3285 return; 4789 return;
3286 4790
3287 EV_FREQUENT_CHECK; 4791 EV_FREQUENT_CHECK;
3288 4792
3289#if EV_USE_INOTIFY 4793#if EV_USE_INOTIFY
… …
3302} 4806}
3303#endif 4807#endif
3304 4808
3305#if EV_IDLE_ENABLE 4809#if EV_IDLE_ENABLE
3306void 4810void
3307ev_idle_start (EV_P_ ev_idle *w) 4811ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3308{ 4812{
3309 if (expect_false (ev_is_active (w))) 4813 if (ecb_expect_false (ev_is_active (w)))
3310 return; 4814 return;
3311 4815
3312 pri_adjust (EV_A_ (W)w); 4816 pri_adjust (EV_A_ (W)w);
3313 4817
3314 EV_FREQUENT_CHECK; 4818 EV_FREQUENT_CHECK;
… …
3317 int active = ++idlecnt [ABSPRI (w)]; 4821 int active = ++idlecnt [ABSPRI (w)];
3318 4822
3319 ++idleall; 4823 ++idleall;
3320 ev_start (EV_A_ (W)w, active); 4824 ev_start (EV_A_ (W)w, active);
3321 4825
3322 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4826 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3323 idles [ABSPRI (w)][active - 1] = w; 4827 idles [ABSPRI (w)][active - 1] = w;
3324 } 4828 }
3325 4829
3326 EV_FREQUENT_CHECK; 4830 EV_FREQUENT_CHECK;
3327} 4831}
3328 4832
3329void 4833void
3330ev_idle_stop (EV_P_ ev_idle *w) 4834ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3331{ 4835{
3332 clear_pending (EV_A_ (W)w); 4836 clear_pending (EV_A_ (W)w);
3333 if (expect_false (!ev_is_active (w))) 4837 if (ecb_expect_false (!ev_is_active (w)))
3334 return; 4838 return;
3335 4839
3336 EV_FREQUENT_CHECK; 4840 EV_FREQUENT_CHECK;
3337 4841
3338 { 4842 {
… …
3349} 4853}
3350#endif 4854#endif
3351 4855
3352#if EV_PREPARE_ENABLE 4856#if EV_PREPARE_ENABLE
3353void 4857void
3354ev_prepare_start (EV_P_ ev_prepare *w) 4858ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3355{ 4859{
3356 if (expect_false (ev_is_active (w))) 4860 if (ecb_expect_false (ev_is_active (w)))
3357 return; 4861 return;
3358 4862
3359 EV_FREQUENT_CHECK; 4863 EV_FREQUENT_CHECK;
3360 4864
3361 ev_start (EV_A_ (W)w, ++preparecnt); 4865 ev_start (EV_A_ (W)w, ++preparecnt);
3362 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4866 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3363 prepares [preparecnt - 1] = w; 4867 prepares [preparecnt - 1] = w;
3364 4868
3365 EV_FREQUENT_CHECK; 4869 EV_FREQUENT_CHECK;
3366} 4870}
3367 4871
3368void 4872void
3369ev_prepare_stop (EV_P_ ev_prepare *w) 4873ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3370{ 4874{
3371 clear_pending (EV_A_ (W)w); 4875 clear_pending (EV_A_ (W)w);
3372 if (expect_false (!ev_is_active (w))) 4876 if (ecb_expect_false (!ev_is_active (w)))
3373 return; 4877 return;
3374 4878
3375 EV_FREQUENT_CHECK; 4879 EV_FREQUENT_CHECK;
3376 4880
3377 { 4881 {
… …
3387} 4891}
3388#endif 4892#endif
3389 4893
3390#if EV_CHECK_ENABLE 4894#if EV_CHECK_ENABLE
3391void 4895void
3392ev_check_start (EV_P_ ev_check *w) 4896ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3393{ 4897{
3394 if (expect_false (ev_is_active (w))) 4898 if (ecb_expect_false (ev_is_active (w)))
3395 return; 4899 return;
3396 4900
3397 EV_FREQUENT_CHECK; 4901 EV_FREQUENT_CHECK;
3398 4902
3399 ev_start (EV_A_ (W)w, ++checkcnt); 4903 ev_start (EV_A_ (W)w, ++checkcnt);
3400 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4904 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3401 checks [checkcnt - 1] = w; 4905 checks [checkcnt - 1] = w;
3402 4906
3403 EV_FREQUENT_CHECK; 4907 EV_FREQUENT_CHECK;
3404} 4908}
3405 4909
3406void 4910void
3407ev_check_stop (EV_P_ ev_check *w) 4911ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3408{ 4912{
3409 clear_pending (EV_A_ (W)w); 4913 clear_pending (EV_A_ (W)w);
3410 if (expect_false (!ev_is_active (w))) 4914 if (ecb_expect_false (!ev_is_active (w)))
3411 return; 4915 return;
3412 4916
3413 EV_FREQUENT_CHECK; 4917 EV_FREQUENT_CHECK;
3414 4918
3415 { 4919 {
… …
3424 EV_FREQUENT_CHECK; 4928 EV_FREQUENT_CHECK;
3425} 4929}
3426#endif 4930#endif
3427 4931
3428#if EV_EMBED_ENABLE 4932#if EV_EMBED_ENABLE
3429void noinline 4933ecb_noinline
4934void
3430ev_embed_sweep (EV_P_ ev_embed *w) 4935ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3431{ 4936{
3432 ev_loop (w->other, EVLOOP_NONBLOCK); 4937 ev_run (w->other, EVRUN_NOWAIT);
3433} 4938}
3434 4939
3435static void 4940static void
3436embed_io_cb (EV_P_ ev_io *io, int revents) 4941embed_io_cb (EV_P_ ev_io *io, int revents)
3437{ 4942{
3438 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4943 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3439 4944
3440 if (ev_cb (w)) 4945 if (ev_cb (w))
3441 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4946 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3442 else 4947 else
3443 ev_loop (w->other, EVLOOP_NONBLOCK); 4948 ev_run (w->other, EVRUN_NOWAIT);
3444} 4949}
3445 4950
3446static void 4951static void
3447embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4952embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3448{ 4953{
… …
3452 EV_P = w->other; 4957 EV_P = w->other;
3453 4958
3454 while (fdchangecnt) 4959 while (fdchangecnt)
3455 { 4960 {
3456 fd_reify (EV_A); 4961 fd_reify (EV_A);
3457 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4962 ev_run (EV_A_ EVRUN_NOWAIT);
3458 } 4963 }
3459 } 4964 }
3460} 4965}
3461 4966
3462static void 4967static void
… …
3468 4973
3469 { 4974 {
3470 EV_P = w->other; 4975 EV_P = w->other;
3471 4976
3472 ev_loop_fork (EV_A); 4977 ev_loop_fork (EV_A);
3473 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4978 ev_run (EV_A_ EVRUN_NOWAIT);
3474 } 4979 }
3475 4980
3476 ev_embed_start (EV_A_ w); 4981 ev_embed_start (EV_A_ w);
3477} 4982}
3478 4983
… …
3483 ev_idle_stop (EV_A_ idle); 4988 ev_idle_stop (EV_A_ idle);
3484} 4989}
3485#endif 4990#endif
3486 4991
3487void 4992void
3488ev_embed_start (EV_P_ ev_embed *w) 4993ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3489{ 4994{
3490 if (expect_false (ev_is_active (w))) 4995 if (ecb_expect_false (ev_is_active (w)))
3491 return; 4996 return;
3492 4997
3493 { 4998 {
3494 EV_P = w->other; 4999 EV_P = w->other;
3495 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 5000 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
… …
3514 5019
3515 EV_FREQUENT_CHECK; 5020 EV_FREQUENT_CHECK;
3516} 5021}
3517 5022
3518void 5023void
3519ev_embed_stop (EV_P_ ev_embed *w) 5024ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3520{ 5025{
3521 clear_pending (EV_A_ (W)w); 5026 clear_pending (EV_A_ (W)w);
3522 if (expect_false (!ev_is_active (w))) 5027 if (ecb_expect_false (!ev_is_active (w)))
3523 return; 5028 return;
3524 5029
3525 EV_FREQUENT_CHECK; 5030 EV_FREQUENT_CHECK;
3526 5031
3527 ev_io_stop (EV_A_ &w->io); 5032 ev_io_stop (EV_A_ &w->io);
… …
3534} 5039}
3535#endif 5040#endif
3536 5041
3537#if EV_FORK_ENABLE 5042#if EV_FORK_ENABLE
3538void 5043void
3539ev_fork_start (EV_P_ ev_fork *w) 5044ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3540{ 5045{
3541 if (expect_false (ev_is_active (w))) 5046 if (ecb_expect_false (ev_is_active (w)))
3542 return; 5047 return;
3543 5048
3544 EV_FREQUENT_CHECK; 5049 EV_FREQUENT_CHECK;
3545 5050
3546 ev_start (EV_A_ (W)w, ++forkcnt); 5051 ev_start (EV_A_ (W)w, ++forkcnt);
3547 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5052 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3548 forks [forkcnt - 1] = w; 5053 forks [forkcnt - 1] = w;
3549 5054
3550 EV_FREQUENT_CHECK; 5055 EV_FREQUENT_CHECK;
3551} 5056}
3552 5057
3553void 5058void
3554ev_fork_stop (EV_P_ ev_fork *w) 5059ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3555{ 5060{
3556 clear_pending (EV_A_ (W)w); 5061 clear_pending (EV_A_ (W)w);
3557 if (expect_false (!ev_is_active (w))) 5062 if (ecb_expect_false (!ev_is_active (w)))
3558 return; 5063 return;
3559 5064
3560 EV_FREQUENT_CHECK; 5065 EV_FREQUENT_CHECK;
3561 5066
3562 { 5067 {
… …
3570 5075
3571 EV_FREQUENT_CHECK; 5076 EV_FREQUENT_CHECK;
3572} 5077}
3573#endif 5078#endif
3574 5079
5080#if EV_CLEANUP_ENABLE
5081void
5082ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5083{
5084 if (ecb_expect_false (ev_is_active (w)))
5085 return;
5086
5087 EV_FREQUENT_CHECK;
5088
5089 ev_start (EV_A_ (W)w, ++cleanupcnt);
5090 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5091 cleanups [cleanupcnt - 1] = w;
5092
5093 /* cleanup watchers should never keep a refcount on the loop */
5094 ev_unref (EV_A);
5095 EV_FREQUENT_CHECK;
5096}
5097
5098void
5099ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5100{
5101 clear_pending (EV_A_ (W)w);
5102 if (ecb_expect_false (!ev_is_active (w)))
5103 return;
5104
5105 EV_FREQUENT_CHECK;
5106 ev_ref (EV_A);
5107
5108 {
5109 int active = ev_active (w);
5110
5111 cleanups [active - 1] = cleanups [--cleanupcnt];
5112 ev_active (cleanups [active - 1]) = active;
5113 }
5114
5115 ev_stop (EV_A_ (W)w);
5116
5117 EV_FREQUENT_CHECK;
5118}
5119#endif
5120
3575#if EV_ASYNC_ENABLE 5121#if EV_ASYNC_ENABLE
3576void 5122void
3577ev_async_start (EV_P_ ev_async *w) 5123ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3578{ 5124{
3579 if (expect_false (ev_is_active (w))) 5125 if (ecb_expect_false (ev_is_active (w)))
3580 return; 5126 return;
3581 5127
5128 w->sent = 0;
5129
3582 evpipe_init (EV_A); 5130 evpipe_init (EV_A);
3583 5131
3584 EV_FREQUENT_CHECK; 5132 EV_FREQUENT_CHECK;
3585 5133
3586 ev_start (EV_A_ (W)w, ++asynccnt); 5134 ev_start (EV_A_ (W)w, ++asynccnt);
3587 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5135 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3588 asyncs [asynccnt - 1] = w; 5136 asyncs [asynccnt - 1] = w;
3589 5137
3590 EV_FREQUENT_CHECK; 5138 EV_FREQUENT_CHECK;
3591} 5139}
3592 5140
3593void 5141void
3594ev_async_stop (EV_P_ ev_async *w) 5142ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3595{ 5143{
3596 clear_pending (EV_A_ (W)w); 5144 clear_pending (EV_A_ (W)w);
3597 if (expect_false (!ev_is_active (w))) 5145 if (ecb_expect_false (!ev_is_active (w)))
3598 return; 5146 return;
3599 5147
3600 EV_FREQUENT_CHECK; 5148 EV_FREQUENT_CHECK;
3601 5149
3602 { 5150 {
… …
3610 5158
3611 EV_FREQUENT_CHECK; 5159 EV_FREQUENT_CHECK;
3612} 5160}
3613 5161
3614void 5162void
3615ev_async_send (EV_P_ ev_async *w) 5163ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3616{ 5164{
3617 w->sent = 1; 5165 w->sent = 1;
3618 evpipe_write (EV_A_ &async_pending); 5166 evpipe_write (EV_A_ &async_pending);
3619} 5167}
3620#endif 5168#endif
… …
3657 5205
3658 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5206 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3659} 5207}
3660 5208
3661void 5209void
3662ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5210ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3663{ 5211{
3664 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5212 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3665
3666 if (expect_false (!once))
3667 {
3668 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3669 return;
3670 }
3671 5213
3672 once->cb = cb; 5214 once->cb = cb;
3673 once->arg = arg; 5215 once->arg = arg;
3674 5216
3675 ev_init (&once->io, once_cb_io); 5217 ev_init (&once->io, once_cb_io);
… …
3688} 5230}
3689 5231
3690/*****************************************************************************/ 5232/*****************************************************************************/
3691 5233
3692#if EV_WALK_ENABLE 5234#if EV_WALK_ENABLE
5235ecb_cold
3693void 5236void
3694ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5237ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3695{ 5238{
3696 int i, j; 5239 int i, j;
3697 ev_watcher_list *wl, *wn; 5240 ev_watcher_list *wl, *wn;
3698 5241
3699 if (types & (EV_IO | EV_EMBED)) 5242 if (types & (EV_IO | EV_EMBED))
… …
3742 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5285 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3743#endif 5286#endif
3744 5287
3745#if EV_IDLE_ENABLE 5288#if EV_IDLE_ENABLE
3746 if (types & EV_IDLE) 5289 if (types & EV_IDLE)
3747 for (j = NUMPRI; i--; ) 5290 for (j = NUMPRI; j--; )
3748 for (i = idlecnt [j]; i--; ) 5291 for (i = idlecnt [j]; i--; )
3749 cb (EV_A_ EV_IDLE, idles [j][i]); 5292 cb (EV_A_ EV_IDLE, idles [j][i]);
3750#endif 5293#endif
3751 5294
3752#if EV_FORK_ENABLE 5295#if EV_FORK_ENABLE
… …
3805 5348
3806#if EV_MULTIPLICITY 5349#if EV_MULTIPLICITY
3807 #include "ev_wrap.h" 5350 #include "ev_wrap.h"
3808#endif 5351#endif
3809 5352
3810#ifdef __cplusplus
3811}
3812#endif
3813

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