ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.355 by root, Fri Oct 22 10:09:12 2010 UTC vs.
Revision 1.490 by root, Thu Jun 20 22:44:59 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,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
156# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
157# endif 163# endif
158 164
159#endif 165#endif
160 166
161#include <math.h> 167/* OS X, in its infinite idiocy, actually HARDCODES
168 * a limit of 1024 into their select. Where people have brains,
169 * OS X engineers apparently have a vacuum. Or maybe they were
170 * ordered to have a vacuum, or they do anything for money.
171 * This might help. Or not.
172 * Note that this must be defined early, as other include files
173 * will rely on this define as well.
174 */
175#define _DARWIN_UNLIMITED_SELECT 1
176
162#include <stdlib.h> 177#include <stdlib.h>
163#include <string.h> 178#include <string.h>
164#include <fcntl.h> 179#include <fcntl.h>
165#include <stddef.h> 180#include <stddef.h>
166 181
… …
178# include EV_H 193# include EV_H
179#else 194#else
180# include "ev.h" 195# include "ev.h"
181#endif 196#endif
182 197
183EV_CPP(extern "C" {) 198#if EV_NO_THREADS
199# undef EV_NO_SMP
200# define EV_NO_SMP 1
201# undef ECB_NO_THREADS
202# define ECB_NO_THREADS 1
203#endif
204#if EV_NO_SMP
205# undef EV_NO_SMP
206# define ECB_NO_SMP 1
207#endif
184 208
185#ifndef _WIN32 209#ifndef _WIN32
186# include <sys/time.h> 210# include <sys/time.h>
187# include <sys/wait.h> 211# include <sys/wait.h>
188# include <unistd.h> 212# include <unistd.h>
189#else 213#else
190# include <io.h> 214# include <io.h>
191# define WIN32_LEAN_AND_MEAN 215# define WIN32_LEAN_AND_MEAN
216# include <winsock2.h>
192# include <windows.h> 217# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 218# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 219# define EV_SELECT_IS_WINSOCKET 1
195# endif 220# endif
196# undef EV_AVOID_STDIO 221# undef EV_AVOID_STDIO
197#endif 222#endif
198 223
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 224/* this block tries to deduce configuration from header-defined symbols and defaults */
208 225
209/* try to deduce the maximum number of signals on this platform */ 226/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 227#if defined EV_NSIG
211/* use what's provided */ 228/* use what's provided */
212#elif defined (NSIG) 229#elif defined NSIG
213# define EV_NSIG (NSIG) 230# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 231#elif defined _NSIG
215# define EV_NSIG (_NSIG) 232# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 233#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 234# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 235#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 236# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 237#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 238# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 239#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 240# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 241#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 242# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 243#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 244# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 245#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 246# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 247#else
231# error "unable to find value for NSIG, please report" 248# define EV_NSIG (8 * sizeof (sigset_t) + 1)
232/* to make it compile regardless, just remove the above line, */ 249#endif
233/* but consider reporting it, too! :) */ 250
234# define EV_NSIG 65 251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
235#endif 253#endif
236 254
237#ifndef EV_USE_CLOCK_SYSCALL 255#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 256# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 258# else
241# define EV_USE_CLOCK_SYSCALL 0 259# define EV_USE_CLOCK_SYSCALL 0
242# endif 260# endif
243#endif 261#endif
244 262
263#if !(_POSIX_TIMERS > 0)
264# ifndef EV_USE_MONOTONIC
265# define EV_USE_MONOTONIC 0
266# endif
267# ifndef EV_USE_REALTIME
268# define EV_USE_REALTIME 0
269# endif
270#endif
271
245#ifndef EV_USE_MONOTONIC 272#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 273# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 274# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 275# else
249# define EV_USE_MONOTONIC 0 276# define EV_USE_MONOTONIC 0
250# endif 277# endif
251#endif 278#endif
… …
288 315
289#ifndef EV_USE_PORT 316#ifndef EV_USE_PORT
290# define EV_USE_PORT 0 317# define EV_USE_PORT 0
291#endif 318#endif
292 319
320#ifndef EV_USE_LINUXAIO
321# define EV_USE_LINUXAIO 0
322#endif
323
293#ifndef EV_USE_INOTIFY 324#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 325# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS 326# define EV_USE_INOTIFY EV_FEATURE_OS
296# else 327# else
297# define EV_USE_INOTIFY 0 328# define EV_USE_INOTIFY 0
… …
338 369
339#ifndef EV_HEAP_CACHE_AT 370#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 371# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 372#endif
342 373
374#ifdef __ANDROID__
375/* supposedly, android doesn't typedef fd_mask */
376# undef EV_USE_SELECT
377# define EV_USE_SELECT 0
378/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
379# undef EV_USE_CLOCK_SYSCALL
380# define EV_USE_CLOCK_SYSCALL 0
381#endif
382
383/* aix's poll.h seems to cause lots of trouble */
384#ifdef _AIX
385/* AIX has a completely broken poll.h header */
386# undef EV_USE_POLL
387# define EV_USE_POLL 0
388#endif
389
390#if EV_USE_LINUXAIO
391# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
392#endif
393
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 394/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 395/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 396#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 397# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 398# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 399# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 400# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 401# define EV_USE_MONOTONIC 1
351# else 402# else
… …
354# endif 405# endif
355#endif 406#endif
356 407
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 408/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 409
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 410#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 411# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 412# define EV_USE_MONOTONIC 0
368#endif 413#endif
369 414
… …
376# undef EV_USE_INOTIFY 421# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 422# define EV_USE_INOTIFY 0
378#endif 423#endif
379 424
380#if !EV_USE_NANOSLEEP 425#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 426/* hp-ux has it in sys/time.h, which we unconditionally include above */
427# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 428# include <sys/select.h>
383# endif 429# endif
384#endif 430#endif
385 431
386#if EV_USE_INOTIFY 432#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 433# include <sys/statfs.h>
389# include <sys/inotify.h> 434# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 435/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 436# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 437# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 438# define EV_USE_INOTIFY 0
394# endif 439# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 440#endif
400 441
401#if EV_USE_EVENTFD 442#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 443/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 444# include <stdint.h>
… …
443#else 484#else
444# define EV_FREQUENT_CHECK do { } while (0) 485# define EV_FREQUENT_CHECK do { } while (0)
445#endif 486#endif
446 487
447/* 488/*
448 * This is used to avoid floating point rounding problems. 489 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 490 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 491 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 492#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
493/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 494
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 495#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 496#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 497
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 498#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 499#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 500
501/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
502/* ECB.H BEGIN */
503/*
504 * libecb - http://software.schmorp.de/pkg/libecb
505 *
506 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
507 * Copyright (©) 2011 Emanuele Giaquinta
508 * All rights reserved.
509 *
510 * Redistribution and use in source and binary forms, with or without modifica-
511 * tion, are permitted provided that the following conditions are met:
512 *
513 * 1. Redistributions of source code must retain the above copyright notice,
514 * this list of conditions and the following disclaimer.
515 *
516 * 2. Redistributions in binary form must reproduce the above copyright
517 * notice, this list of conditions and the following disclaimer in the
518 * documentation and/or other materials provided with the distribution.
519 *
520 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
521 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
522 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
523 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
524 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
525 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
526 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
527 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
528 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
529 * OF THE POSSIBILITY OF SUCH DAMAGE.
530 *
531 * Alternatively, the contents of this file may be used under the terms of
532 * the GNU General Public License ("GPL") version 2 or any later version,
533 * in which case the provisions of the GPL are applicable instead of
534 * the above. If you wish to allow the use of your version of this file
535 * only under the terms of the GPL and not to allow others to use your
536 * version of this file under the BSD license, indicate your decision
537 * by deleting the provisions above and replace them with the notice
538 * and other provisions required by the GPL. If you do not delete the
539 * provisions above, a recipient may use your version of this file under
540 * either the BSD or the GPL.
541 */
542
543#ifndef ECB_H
544#define ECB_H
545
546/* 16 bits major, 16 bits minor */
547#define ECB_VERSION 0x00010005
548
549#ifdef _WIN32
550 typedef signed char int8_t;
551 typedef unsigned char uint8_t;
552 typedef signed short int16_t;
553 typedef unsigned short uint16_t;
554 typedef signed int int32_t;
555 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 556 #if __GNUC__
557 typedef signed long long int64_t;
558 typedef unsigned long long uint64_t;
559 #else /* _MSC_VER || __BORLANDC__ */
560 typedef signed __int64 int64_t;
561 typedef unsigned __int64 uint64_t;
562 #endif
563 #ifdef _WIN64
564 #define ECB_PTRSIZE 8
565 typedef uint64_t uintptr_t;
566 typedef int64_t intptr_t;
567 #else
568 #define ECB_PTRSIZE 4
569 typedef uint32_t uintptr_t;
570 typedef int32_t intptr_t;
571 #endif
572#else
573 #include <inttypes.h>
574 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
575 #define ECB_PTRSIZE 8
576 #else
577 #define ECB_PTRSIZE 4
578 #endif
579#endif
580
581#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
582#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
583
584/* work around x32 idiocy by defining proper macros */
585#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
586 #if _ILP32
587 #define ECB_AMD64_X32 1
588 #else
589 #define ECB_AMD64 1
590 #endif
591#endif
592
593/* many compilers define _GNUC_ to some versions but then only implement
594 * what their idiot authors think are the "more important" extensions,
595 * causing enormous grief in return for some better fake benchmark numbers.
596 * or so.
597 * we try to detect these and simply assume they are not gcc - if they have
598 * an issue with that they should have done it right in the first place.
599 */
600#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
601 #define ECB_GCC_VERSION(major,minor) 0
602#else
603 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
604#endif
605
606#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
607
608#if __clang__ && defined __has_builtin
609 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
610#else
611 #define ECB_CLANG_BUILTIN(x) 0
612#endif
613
614#if __clang__ && defined __has_extension
615 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
616#else
617 #define ECB_CLANG_EXTENSION(x) 0
618#endif
619
620#define ECB_CPP (__cplusplus+0)
621#define ECB_CPP11 (__cplusplus >= 201103L)
622#define ECB_CPP14 (__cplusplus >= 201402L)
623#define ECB_CPP17 (__cplusplus >= 201703L)
624
625#if ECB_CPP
626 #define ECB_C 0
627 #define ECB_STDC_VERSION 0
628#else
629 #define ECB_C 1
630 #define ECB_STDC_VERSION __STDC_VERSION__
631#endif
632
633#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
634#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
635#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
636
637#if ECB_CPP
638 #define ECB_EXTERN_C extern "C"
639 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
640 #define ECB_EXTERN_C_END }
641#else
642 #define ECB_EXTERN_C extern
643 #define ECB_EXTERN_C_BEG
644 #define ECB_EXTERN_C_END
645#endif
646
647/*****************************************************************************/
648
649/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
650/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
651
652#if ECB_NO_THREADS
653 #define ECB_NO_SMP 1
654#endif
655
656#if ECB_NO_SMP
657 #define ECB_MEMORY_FENCE do { } while (0)
658#endif
659
660/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
661#if __xlC__ && ECB_CPP
662 #include <builtins.h>
663#endif
664
665#if 1400 <= _MSC_VER
666 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
667#endif
668
669#ifndef ECB_MEMORY_FENCE
670 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
671 #if __i386 || __i386__
672 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
673 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
674 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
675 #elif ECB_GCC_AMD64
676 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
677 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
678 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
679 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
680 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
681 #elif defined __ARM_ARCH_2__ \
682 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
683 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
684 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
685 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
686 || defined __ARM_ARCH_5TEJ__
687 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
688 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
689 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
690 || defined __ARM_ARCH_6T2__
691 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
692 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
693 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
695 #elif __aarch64__
696 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
697 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
698 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
699 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
700 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
701 #elif defined __s390__ || defined __s390x__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
703 #elif defined __mips__
704 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
705 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
706 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
707 #elif defined __alpha__
708 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
709 #elif defined __hppa__
710 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
711 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
712 #elif defined __ia64__
713 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
714 #elif defined __m68k__
715 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
716 #elif defined __m88k__
717 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
718 #elif defined __sh__
719 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
720 #endif
721 #endif
722#endif
723
724#ifndef ECB_MEMORY_FENCE
725 #if ECB_GCC_VERSION(4,7)
726 /* see comment below (stdatomic.h) about the C11 memory model. */
727 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
728 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
729 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
730
731 #elif ECB_CLANG_EXTENSION(c_atomic)
732 /* see comment below (stdatomic.h) about the C11 memory model. */
733 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
734 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
735 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
736
737 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
738 #define ECB_MEMORY_FENCE __sync_synchronize ()
739 #elif _MSC_VER >= 1500 /* VC++ 2008 */
740 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
741 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
742 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
743 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
744 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
745 #elif _MSC_VER >= 1400 /* VC++ 2005 */
746 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
747 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
748 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
749 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
750 #elif defined _WIN32
751 #include <WinNT.h>
752 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
753 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
754 #include <mbarrier.h>
755 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
756 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
757 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
758 #elif __xlC__
759 #define ECB_MEMORY_FENCE __sync ()
760 #endif
761#endif
762
763#ifndef ECB_MEMORY_FENCE
764 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
765 /* we assume that these memory fences work on all variables/all memory accesses, */
766 /* not just C11 atomics and atomic accesses */
767 #include <stdatomic.h>
768 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
769 /* any fence other than seq_cst, which isn't very efficient for us. */
770 /* Why that is, we don't know - either the C11 memory model is quite useless */
771 /* for most usages, or gcc and clang have a bug */
772 /* I *currently* lean towards the latter, and inefficiently implement */
773 /* all three of ecb's fences as a seq_cst fence */
774 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
775 /* for all __atomic_thread_fence's except seq_cst */
776 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
777 #endif
778#endif
779
780#ifndef ECB_MEMORY_FENCE
781 #if !ECB_AVOID_PTHREADS
782 /*
783 * if you get undefined symbol references to pthread_mutex_lock,
784 * or failure to find pthread.h, then you should implement
785 * the ECB_MEMORY_FENCE operations for your cpu/compiler
786 * OR provide pthread.h and link against the posix thread library
787 * of your system.
788 */
789 #include <pthread.h>
790 #define ECB_NEEDS_PTHREADS 1
791 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
792
793 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
794 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
795 #endif
796#endif
797
798#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
799 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
800#endif
801
802#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
803 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
804#endif
805
806/*****************************************************************************/
807
808#if ECB_CPP
809 #define ecb_inline static inline
810#elif ECB_GCC_VERSION(2,5)
811 #define ecb_inline static __inline__
812#elif ECB_C99
813 #define ecb_inline static inline
814#else
815 #define ecb_inline static
816#endif
817
818#if ECB_GCC_VERSION(3,3)
819 #define ecb_restrict __restrict__
820#elif ECB_C99
821 #define ecb_restrict restrict
822#else
823 #define ecb_restrict
824#endif
825
826typedef int ecb_bool;
827
828#define ECB_CONCAT_(a, b) a ## b
829#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
830#define ECB_STRINGIFY_(a) # a
831#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
832#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
833
834#define ecb_function_ ecb_inline
835
836#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
837 #define ecb_attribute(attrlist) __attribute__ (attrlist)
838#else
839 #define ecb_attribute(attrlist)
840#endif
841
842#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
843 #define ecb_is_constant(expr) __builtin_constant_p (expr)
844#else
845 /* possible C11 impl for integral types
846 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
847 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
848
849 #define ecb_is_constant(expr) 0
850#endif
851
852#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
464# define expect(expr,value) __builtin_expect ((expr),(value)) 853 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
465# define noinline __attribute__ ((noinline))
466#else 854#else
467# define expect(expr,value) (expr) 855 #define ecb_expect(expr,value) (expr)
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif 856#endif
472#endif
473 857
858#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
859 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
860#else
861 #define ecb_prefetch(addr,rw,locality)
862#endif
863
864/* no emulation for ecb_decltype */
865#if ECB_CPP11
866 // older implementations might have problems with decltype(x)::type, work around it
867 template<class T> struct ecb_decltype_t { typedef T type; };
868 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
869#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
870 #define ecb_decltype(x) __typeof__ (x)
871#endif
872
873#if _MSC_VER >= 1300
874 #define ecb_deprecated __declspec (deprecated)
875#else
876 #define ecb_deprecated ecb_attribute ((__deprecated__))
877#endif
878
879#if _MSC_VER >= 1500
880 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
881#elif ECB_GCC_VERSION(4,5)
882 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
883#else
884 #define ecb_deprecated_message(msg) ecb_deprecated
885#endif
886
887#if _MSC_VER >= 1400
888 #define ecb_noinline __declspec (noinline)
889#else
890 #define ecb_noinline ecb_attribute ((__noinline__))
891#endif
892
893#define ecb_unused ecb_attribute ((__unused__))
894#define ecb_const ecb_attribute ((__const__))
895#define ecb_pure ecb_attribute ((__pure__))
896
897#if ECB_C11 || __IBMC_NORETURN
898 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
899 #define ecb_noreturn _Noreturn
900#elif ECB_CPP11
901 #define ecb_noreturn [[noreturn]]
902#elif _MSC_VER >= 1200
903 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
904 #define ecb_noreturn __declspec (noreturn)
905#else
906 #define ecb_noreturn ecb_attribute ((__noreturn__))
907#endif
908
909#if ECB_GCC_VERSION(4,3)
910 #define ecb_artificial ecb_attribute ((__artificial__))
911 #define ecb_hot ecb_attribute ((__hot__))
912 #define ecb_cold ecb_attribute ((__cold__))
913#else
914 #define ecb_artificial
915 #define ecb_hot
916 #define ecb_cold
917#endif
918
919/* put around conditional expressions if you are very sure that the */
920/* expression is mostly true or mostly false. note that these return */
921/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 922#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 923#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
924/* for compatibility to the rest of the world */
925#define ecb_likely(expr) ecb_expect_true (expr)
926#define ecb_unlikely(expr) ecb_expect_false (expr)
927
928/* count trailing zero bits and count # of one bits */
929#if ECB_GCC_VERSION(3,4) \
930 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
931 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
932 && ECB_CLANG_BUILTIN(__builtin_popcount))
933 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
934 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
935 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
936 #define ecb_ctz32(x) __builtin_ctz (x)
937 #define ecb_ctz64(x) __builtin_ctzll (x)
938 #define ecb_popcount32(x) __builtin_popcount (x)
939 /* no popcountll */
940#else
941 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
942 ecb_function_ ecb_const int
943 ecb_ctz32 (uint32_t x)
944 {
945#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
946 unsigned long r;
947 _BitScanForward (&r, x);
948 return (int)r;
949#else
950 int r = 0;
951
952 x &= ~x + 1; /* this isolates the lowest bit */
953
954#if ECB_branchless_on_i386
955 r += !!(x & 0xaaaaaaaa) << 0;
956 r += !!(x & 0xcccccccc) << 1;
957 r += !!(x & 0xf0f0f0f0) << 2;
958 r += !!(x & 0xff00ff00) << 3;
959 r += !!(x & 0xffff0000) << 4;
960#else
961 if (x & 0xaaaaaaaa) r += 1;
962 if (x & 0xcccccccc) r += 2;
963 if (x & 0xf0f0f0f0) r += 4;
964 if (x & 0xff00ff00) r += 8;
965 if (x & 0xffff0000) r += 16;
966#endif
967
968 return r;
969#endif
970 }
971
972 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
973 ecb_function_ ecb_const int
974 ecb_ctz64 (uint64_t x)
975 {
976#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
977 unsigned long r;
978 _BitScanForward64 (&r, x);
979 return (int)r;
980#else
981 int shift = x & 0xffffffff ? 0 : 32;
982 return ecb_ctz32 (x >> shift) + shift;
983#endif
984 }
985
986 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
987 ecb_function_ ecb_const int
988 ecb_popcount32 (uint32_t x)
989 {
990 x -= (x >> 1) & 0x55555555;
991 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
992 x = ((x >> 4) + x) & 0x0f0f0f0f;
993 x *= 0x01010101;
994
995 return x >> 24;
996 }
997
998 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
999 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1000 {
1001#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1002 unsigned long r;
1003 _BitScanReverse (&r, x);
1004 return (int)r;
1005#else
1006 int r = 0;
1007
1008 if (x >> 16) { x >>= 16; r += 16; }
1009 if (x >> 8) { x >>= 8; r += 8; }
1010 if (x >> 4) { x >>= 4; r += 4; }
1011 if (x >> 2) { x >>= 2; r += 2; }
1012 if (x >> 1) { r += 1; }
1013
1014 return r;
1015#endif
1016 }
1017
1018 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1019 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1020 {
1021#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1022 unsigned long r;
1023 _BitScanReverse64 (&r, x);
1024 return (int)r;
1025#else
1026 int r = 0;
1027
1028 if (x >> 32) { x >>= 32; r += 32; }
1029
1030 return r + ecb_ld32 (x);
1031#endif
1032 }
1033#endif
1034
1035ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1036ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1037ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1038ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1039
1040ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1041ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1042{
1043 return ( (x * 0x0802U & 0x22110U)
1044 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1045}
1046
1047ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1048ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1049{
1050 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1051 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1052 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1053 x = ( x >> 8 ) | ( x << 8);
1054
1055 return x;
1056}
1057
1058ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1059ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1060{
1061 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1062 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1063 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1064 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1065 x = ( x >> 16 ) | ( x << 16);
1066
1067 return x;
1068}
1069
1070/* popcount64 is only available on 64 bit cpus as gcc builtin */
1071/* so for this version we are lazy */
1072ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1073ecb_function_ ecb_const int
1074ecb_popcount64 (uint64_t x)
1075{
1076 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1077}
1078
1079ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1080ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1081ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1082ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1083ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1084ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1085ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1086ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1087
1088ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1089ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1090ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1091ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1092ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1093ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1094ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1095ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1096
1097#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1098 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1099 #define ecb_bswap16(x) __builtin_bswap16 (x)
1100 #else
1101 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1102 #endif
1103 #define ecb_bswap32(x) __builtin_bswap32 (x)
1104 #define ecb_bswap64(x) __builtin_bswap64 (x)
1105#elif _MSC_VER
1106 #include <stdlib.h>
1107 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1108 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1109 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1110#else
1111 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1112 ecb_function_ ecb_const uint16_t
1113 ecb_bswap16 (uint16_t x)
1114 {
1115 return ecb_rotl16 (x, 8);
1116 }
1117
1118 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1119 ecb_function_ ecb_const uint32_t
1120 ecb_bswap32 (uint32_t x)
1121 {
1122 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1123 }
1124
1125 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1126 ecb_function_ ecb_const uint64_t
1127 ecb_bswap64 (uint64_t x)
1128 {
1129 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1130 }
1131#endif
1132
1133#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1134 #define ecb_unreachable() __builtin_unreachable ()
1135#else
1136 /* this seems to work fine, but gcc always emits a warning for it :/ */
1137 ecb_inline ecb_noreturn void ecb_unreachable (void);
1138 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1139#endif
1140
1141/* try to tell the compiler that some condition is definitely true */
1142#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1143
1144ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1145ecb_inline ecb_const uint32_t
1146ecb_byteorder_helper (void)
1147{
1148 /* the union code still generates code under pressure in gcc, */
1149 /* but less than using pointers, and always seems to */
1150 /* successfully return a constant. */
1151 /* the reason why we have this horrible preprocessor mess */
1152 /* is to avoid it in all cases, at least on common architectures */
1153 /* or when using a recent enough gcc version (>= 4.6) */
1154#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1155 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1156 #define ECB_LITTLE_ENDIAN 1
1157 return 0x44332211;
1158#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1159 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1160 #define ECB_BIG_ENDIAN 1
1161 return 0x11223344;
1162#else
1163 union
1164 {
1165 uint8_t c[4];
1166 uint32_t u;
1167 } u = { 0x11, 0x22, 0x33, 0x44 };
1168 return u.u;
1169#endif
1170}
1171
1172ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1173ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1174ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1175ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1176
1177#if ECB_GCC_VERSION(3,0) || ECB_C99
1178 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1179#else
1180 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1181#endif
1182
1183#if ECB_CPP
1184 template<typename T>
1185 static inline T ecb_div_rd (T val, T div)
1186 {
1187 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1188 }
1189 template<typename T>
1190 static inline T ecb_div_ru (T val, T div)
1191 {
1192 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1193 }
1194#else
1195 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1196 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1197#endif
1198
1199#if ecb_cplusplus_does_not_suck
1200 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1201 template<typename T, int N>
1202 static inline int ecb_array_length (const T (&arr)[N])
1203 {
1204 return N;
1205 }
1206#else
1207 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1208#endif
1209
1210ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1211ecb_function_ ecb_const uint32_t
1212ecb_binary16_to_binary32 (uint32_t x)
1213{
1214 unsigned int s = (x & 0x8000) << (31 - 15);
1215 int e = (x >> 10) & 0x001f;
1216 unsigned int m = x & 0x03ff;
1217
1218 if (ecb_expect_false (e == 31))
1219 /* infinity or NaN */
1220 e = 255 - (127 - 15);
1221 else if (ecb_expect_false (!e))
1222 {
1223 if (ecb_expect_true (!m))
1224 /* zero, handled by code below by forcing e to 0 */
1225 e = 0 - (127 - 15);
1226 else
1227 {
1228 /* subnormal, renormalise */
1229 unsigned int s = 10 - ecb_ld32 (m);
1230
1231 m = (m << s) & 0x3ff; /* mask implicit bit */
1232 e -= s - 1;
1233 }
1234 }
1235
1236 /* e and m now are normalised, or zero, (or inf or nan) */
1237 e += 127 - 15;
1238
1239 return s | (e << 23) | (m << (23 - 10));
1240}
1241
1242ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1243ecb_function_ ecb_const uint16_t
1244ecb_binary32_to_binary16 (uint32_t x)
1245{
1246 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1247 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1248 unsigned int m = x & 0x007fffff;
1249
1250 x &= 0x7fffffff;
1251
1252 /* if it's within range of binary16 normals, use fast path */
1253 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1254 {
1255 /* mantissa round-to-even */
1256 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1257
1258 /* handle overflow */
1259 if (ecb_expect_false (m >= 0x00800000))
1260 {
1261 m >>= 1;
1262 e += 1;
1263 }
1264
1265 return s | (e << 10) | (m >> (23 - 10));
1266 }
1267
1268 /* handle large numbers and infinity */
1269 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1270 return s | 0x7c00;
1271
1272 /* handle zero, subnormals and small numbers */
1273 if (ecb_expect_true (x < 0x38800000))
1274 {
1275 /* zero */
1276 if (ecb_expect_true (!x))
1277 return s;
1278
1279 /* handle subnormals */
1280
1281 /* too small, will be zero */
1282 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1283 return s;
1284
1285 m |= 0x00800000; /* make implicit bit explicit */
1286
1287 /* very tricky - we need to round to the nearest e (+10) bit value */
1288 {
1289 unsigned int bits = 14 - e;
1290 unsigned int half = (1 << (bits - 1)) - 1;
1291 unsigned int even = (m >> bits) & 1;
1292
1293 /* if this overflows, we will end up with a normalised number */
1294 m = (m + half + even) >> bits;
1295 }
1296
1297 return s | m;
1298 }
1299
1300 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1301 m >>= 13;
1302
1303 return s | 0x7c00 | m | !m;
1304}
1305
1306/*******************************************************************************/
1307/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1308
1309/* basically, everything uses "ieee pure-endian" floating point numbers */
1310/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1311#if 0 \
1312 || __i386 || __i386__ \
1313 || ECB_GCC_AMD64 \
1314 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1315 || defined __s390__ || defined __s390x__ \
1316 || defined __mips__ \
1317 || defined __alpha__ \
1318 || defined __hppa__ \
1319 || defined __ia64__ \
1320 || defined __m68k__ \
1321 || defined __m88k__ \
1322 || defined __sh__ \
1323 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1324 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1325 || defined __aarch64__
1326 #define ECB_STDFP 1
1327 #include <string.h> /* for memcpy */
1328#else
1329 #define ECB_STDFP 0
1330#endif
1331
1332#ifndef ECB_NO_LIBM
1333
1334 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1335
1336 /* only the oldest of old doesn't have this one. solaris. */
1337 #ifdef INFINITY
1338 #define ECB_INFINITY INFINITY
1339 #else
1340 #define ECB_INFINITY HUGE_VAL
1341 #endif
1342
1343 #ifdef NAN
1344 #define ECB_NAN NAN
1345 #else
1346 #define ECB_NAN ECB_INFINITY
1347 #endif
1348
1349 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1350 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1351 #define ecb_frexpf(x,e) frexpf ((x), (e))
1352 #else
1353 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1354 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1355 #endif
1356
1357 /* convert a float to ieee single/binary32 */
1358 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1359 ecb_function_ ecb_const uint32_t
1360 ecb_float_to_binary32 (float x)
1361 {
1362 uint32_t r;
1363
1364 #if ECB_STDFP
1365 memcpy (&r, &x, 4);
1366 #else
1367 /* slow emulation, works for anything but -0 */
1368 uint32_t m;
1369 int e;
1370
1371 if (x == 0e0f ) return 0x00000000U;
1372 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1373 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1374 if (x != x ) return 0x7fbfffffU;
1375
1376 m = ecb_frexpf (x, &e) * 0x1000000U;
1377
1378 r = m & 0x80000000U;
1379
1380 if (r)
1381 m = -m;
1382
1383 if (e <= -126)
1384 {
1385 m &= 0xffffffU;
1386 m >>= (-125 - e);
1387 e = -126;
1388 }
1389
1390 r |= (e + 126) << 23;
1391 r |= m & 0x7fffffU;
1392 #endif
1393
1394 return r;
1395 }
1396
1397 /* converts an ieee single/binary32 to a float */
1398 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1399 ecb_function_ ecb_const float
1400 ecb_binary32_to_float (uint32_t x)
1401 {
1402 float r;
1403
1404 #if ECB_STDFP
1405 memcpy (&r, &x, 4);
1406 #else
1407 /* emulation, only works for normals and subnormals and +0 */
1408 int neg = x >> 31;
1409 int e = (x >> 23) & 0xffU;
1410
1411 x &= 0x7fffffU;
1412
1413 if (e)
1414 x |= 0x800000U;
1415 else
1416 e = 1;
1417
1418 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1419 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1420
1421 r = neg ? -r : r;
1422 #endif
1423
1424 return r;
1425 }
1426
1427 /* convert a double to ieee double/binary64 */
1428 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1429 ecb_function_ ecb_const uint64_t
1430 ecb_double_to_binary64 (double x)
1431 {
1432 uint64_t r;
1433
1434 #if ECB_STDFP
1435 memcpy (&r, &x, 8);
1436 #else
1437 /* slow emulation, works for anything but -0 */
1438 uint64_t m;
1439 int e;
1440
1441 if (x == 0e0 ) return 0x0000000000000000U;
1442 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1443 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1444 if (x != x ) return 0X7ff7ffffffffffffU;
1445
1446 m = frexp (x, &e) * 0x20000000000000U;
1447
1448 r = m & 0x8000000000000000;;
1449
1450 if (r)
1451 m = -m;
1452
1453 if (e <= -1022)
1454 {
1455 m &= 0x1fffffffffffffU;
1456 m >>= (-1021 - e);
1457 e = -1022;
1458 }
1459
1460 r |= ((uint64_t)(e + 1022)) << 52;
1461 r |= m & 0xfffffffffffffU;
1462 #endif
1463
1464 return r;
1465 }
1466
1467 /* converts an ieee double/binary64 to a double */
1468 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1469 ecb_function_ ecb_const double
1470 ecb_binary64_to_double (uint64_t x)
1471 {
1472 double r;
1473
1474 #if ECB_STDFP
1475 memcpy (&r, &x, 8);
1476 #else
1477 /* emulation, only works for normals and subnormals and +0 */
1478 int neg = x >> 63;
1479 int e = (x >> 52) & 0x7ffU;
1480
1481 x &= 0xfffffffffffffU;
1482
1483 if (e)
1484 x |= 0x10000000000000U;
1485 else
1486 e = 1;
1487
1488 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1489 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1490
1491 r = neg ? -r : r;
1492 #endif
1493
1494 return r;
1495 }
1496
1497 /* convert a float to ieee half/binary16 */
1498 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1499 ecb_function_ ecb_const uint16_t
1500 ecb_float_to_binary16 (float x)
1501 {
1502 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1503 }
1504
1505 /* convert an ieee half/binary16 to float */
1506 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1507 ecb_function_ ecb_const float
1508 ecb_binary16_to_float (uint16_t x)
1509 {
1510 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1511 }
1512
1513#endif
1514
1515#endif
1516
1517/* ECB.H END */
1518
1519#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1520/* if your architecture doesn't need memory fences, e.g. because it is
1521 * single-cpu/core, or if you use libev in a project that doesn't use libev
1522 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1523 * libev, in which cases the memory fences become nops.
1524 * alternatively, you can remove this #error and link against libpthread,
1525 * which will then provide the memory fences.
1526 */
1527# error "memory fences not defined for your architecture, please report"
1528#endif
1529
1530#ifndef ECB_MEMORY_FENCE
1531# define ECB_MEMORY_FENCE do { } while (0)
1532# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1533# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1534#endif
1535
1536#define expect_false(cond) ecb_expect_false (cond)
1537#define expect_true(cond) ecb_expect_true (cond)
1538#define noinline ecb_noinline
1539
476#define inline_size static inline 1540#define inline_size ecb_inline
477 1541
478#if EV_FEATURE_CODE 1542#if EV_FEATURE_CODE
479# define inline_speed static inline 1543# define inline_speed ecb_inline
480#else 1544#else
481# define inline_speed static noinline 1545# define inline_speed noinline static
482#endif 1546#endif
483 1547
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1548#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485 1549
486#if EV_MINPRI == EV_MAXPRI 1550#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0) 1551# define ABSPRI(w) (((W)w), 0)
488#else 1552#else
489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1553# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif 1554#endif
491 1555
492#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1556#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494 1557
495typedef ev_watcher *W; 1558typedef ev_watcher *W;
496typedef ev_watcher_list *WL; 1559typedef ev_watcher_list *WL;
497typedef ev_watcher_time *WT; 1560typedef ev_watcher_time *WT;
498 1561
… …
523# include "ev_win32.c" 1586# include "ev_win32.c"
524#endif 1587#endif
525 1588
526/*****************************************************************************/ 1589/*****************************************************************************/
527 1590
1591/* define a suitable floor function (only used by periodics atm) */
1592
1593#if EV_USE_FLOOR
1594# include <math.h>
1595# define ev_floor(v) floor (v)
1596#else
1597
1598#include <float.h>
1599
1600/* a floor() replacement function, should be independent of ev_tstamp type */
1601noinline
1602static ev_tstamp
1603ev_floor (ev_tstamp v)
1604{
1605 /* the choice of shift factor is not terribly important */
1606#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1607 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1608#else
1609 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1610#endif
1611
1612 /* argument too large for an unsigned long? */
1613 if (expect_false (v >= shift))
1614 {
1615 ev_tstamp f;
1616
1617 if (v == v - 1.)
1618 return v; /* very large number */
1619
1620 f = shift * ev_floor (v * (1. / shift));
1621 return f + ev_floor (v - f);
1622 }
1623
1624 /* special treatment for negative args? */
1625 if (expect_false (v < 0.))
1626 {
1627 ev_tstamp f = -ev_floor (-v);
1628
1629 return f - (f == v ? 0 : 1);
1630 }
1631
1632 /* fits into an unsigned long */
1633 return (unsigned long)v;
1634}
1635
1636#endif
1637
1638/*****************************************************************************/
1639
1640#ifdef __linux
1641# include <sys/utsname.h>
1642#endif
1643
1644noinline ecb_cold
528static unsigned int noinline 1645static unsigned int
529ev_linux_version (void) 1646ev_linux_version (void)
530{ 1647{
531#ifdef __linux 1648#ifdef __linux
1649 unsigned int v = 0;
532 struct utsname buf; 1650 struct utsname buf;
533 unsigned int v;
534 int i; 1651 int i;
535 char *p = buf.release; 1652 char *p = buf.release;
536 1653
537 if (uname (&buf)) 1654 if (uname (&buf))
538 return 0; 1655 return 0;
… …
562} 1679}
563 1680
564/*****************************************************************************/ 1681/*****************************************************************************/
565 1682
566#if EV_AVOID_STDIO 1683#if EV_AVOID_STDIO
567static void noinline 1684noinline ecb_cold
1685static void
568ev_printerr (const char *msg) 1686ev_printerr (const char *msg)
569{ 1687{
570 write (STDERR_FILENO, msg, strlen (msg)); 1688 write (STDERR_FILENO, msg, strlen (msg));
571} 1689}
572#endif 1690#endif
573 1691
574static void (*syserr_cb)(const char *msg); 1692static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
575 1693
1694ecb_cold
576void 1695void
577ev_set_syserr_cb (void (*cb)(const char *msg)) 1696ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
578{ 1697{
579 syserr_cb = cb; 1698 syserr_cb = cb;
580} 1699}
581 1700
582static void noinline 1701noinline ecb_cold
1702static void
583ev_syserr (const char *msg) 1703ev_syserr (const char *msg)
584{ 1704{
585 if (!msg) 1705 if (!msg)
586 msg = "(libev) system error"; 1706 msg = "(libev) system error";
587 1707
588 if (syserr_cb) 1708 if (syserr_cb)
589 syserr_cb (msg); 1709 syserr_cb (msg);
590 else 1710 else
591 { 1711 {
592#if EV_AVOID_STDIO 1712#if EV_AVOID_STDIO
593 const char *err = strerror (errno);
594
595 ev_printerr (msg); 1713 ev_printerr (msg);
596 ev_printerr (": "); 1714 ev_printerr (": ");
597 ev_printerr (err); 1715 ev_printerr (strerror (errno));
598 ev_printerr ("\n"); 1716 ev_printerr ("\n");
599#else 1717#else
600 perror (msg); 1718 perror (msg);
601#endif 1719#endif
602 abort (); 1720 abort ();
603 } 1721 }
604} 1722}
605 1723
606static void * 1724static void *
607ev_realloc_emul (void *ptr, long size) 1725ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
608{ 1726{
609#if __GLIBC__
610 return realloc (ptr, size);
611#else
612 /* some systems, notably openbsd and darwin, fail to properly 1727 /* some systems, notably openbsd and darwin, fail to properly
613 * implement realloc (x, 0) (as required by both ansi c-89 and 1728 * implement realloc (x, 0) (as required by both ansi c-89 and
614 * the single unix specification, so work around them here. 1729 * the single unix specification, so work around them here.
1730 * recently, also (at least) fedora and debian started breaking it,
1731 * despite documenting it otherwise.
615 */ 1732 */
616 1733
617 if (size) 1734 if (size)
618 return realloc (ptr, size); 1735 return realloc (ptr, size);
619 1736
620 free (ptr); 1737 free (ptr);
621 return 0; 1738 return 0;
622#endif
623} 1739}
624 1740
625static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1741static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
626 1742
1743ecb_cold
627void 1744void
628ev_set_allocator (void *(*cb)(void *ptr, long size)) 1745ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
629{ 1746{
630 alloc = cb; 1747 alloc = cb;
631} 1748}
632 1749
633inline_speed void * 1750inline_speed void *
… …
636 ptr = alloc (ptr, size); 1753 ptr = alloc (ptr, size);
637 1754
638 if (!ptr && size) 1755 if (!ptr && size)
639 { 1756 {
640#if EV_AVOID_STDIO 1757#if EV_AVOID_STDIO
641 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1758 ev_printerr ("(libev) memory allocation failed, aborting.\n");
642#else 1759#else
643 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1760 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
644#endif 1761#endif
645 abort (); 1762 abort ();
646 } 1763 }
647 1764
648 return ptr; 1765 return ptr;
… …
660typedef struct 1777typedef struct
661{ 1778{
662 WL head; 1779 WL head;
663 unsigned char events; /* the events watched for */ 1780 unsigned char events; /* the events watched for */
664 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1781 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
665 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1782 unsigned char emask; /* some backends store the actual kernel mask in here */
666 unsigned char unused; 1783 unsigned char unused;
667#if EV_USE_EPOLL 1784#if EV_USE_EPOLL
668 unsigned int egen; /* generation counter to counter epoll bugs */ 1785 unsigned int egen; /* generation counter to counter epoll bugs */
669#endif 1786#endif
670#if EV_SELECT_IS_WINSOCKET 1787#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
671 SOCKET handle; 1788 SOCKET handle;
1789#endif
1790#if EV_USE_IOCP
1791 OVERLAPPED or, ow;
672#endif 1792#endif
673} ANFD; 1793} ANFD;
674 1794
675/* stores the pending event set for a given watcher */ 1795/* stores the pending event set for a given watcher */
676typedef struct 1796typedef struct
… …
718 #undef VAR 1838 #undef VAR
719 }; 1839 };
720 #include "ev_wrap.h" 1840 #include "ev_wrap.h"
721 1841
722 static struct ev_loop default_loop_struct; 1842 static struct ev_loop default_loop_struct;
723 struct ev_loop *ev_default_loop_ptr; 1843 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
724 1844
725#else 1845#else
726 1846
727 ev_tstamp ev_rt_now; 1847 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
728 #define VAR(name,decl) static decl; 1848 #define VAR(name,decl) static decl;
729 #include "ev_vars.h" 1849 #include "ev_vars.h"
730 #undef VAR 1850 #undef VAR
731 1851
732 static int ev_default_loop_ptr; 1852 static int ev_default_loop_ptr;
… …
747 1867
748/*****************************************************************************/ 1868/*****************************************************************************/
749 1869
750#ifndef EV_HAVE_EV_TIME 1870#ifndef EV_HAVE_EV_TIME
751ev_tstamp 1871ev_tstamp
752ev_time (void) 1872ev_time (void) EV_NOEXCEPT
753{ 1873{
754#if EV_USE_REALTIME 1874#if EV_USE_REALTIME
755 if (expect_true (have_realtime)) 1875 if (expect_true (have_realtime))
756 { 1876 {
757 struct timespec ts; 1877 struct timespec ts;
… …
781 return ev_time (); 1901 return ev_time ();
782} 1902}
783 1903
784#if EV_MULTIPLICITY 1904#if EV_MULTIPLICITY
785ev_tstamp 1905ev_tstamp
786ev_now (EV_P) 1906ev_now (EV_P) EV_NOEXCEPT
787{ 1907{
788 return ev_rt_now; 1908 return ev_rt_now;
789} 1909}
790#endif 1910#endif
791 1911
792void 1912void
793ev_sleep (ev_tstamp delay) 1913ev_sleep (ev_tstamp delay) EV_NOEXCEPT
794{ 1914{
795 if (delay > 0.) 1915 if (delay > 0.)
796 { 1916 {
797#if EV_USE_NANOSLEEP 1917#if EV_USE_NANOSLEEP
798 struct timespec ts; 1918 struct timespec ts;
799 1919
800 EV_TS_SET (ts, delay); 1920 EV_TS_SET (ts, delay);
801 nanosleep (&ts, 0); 1921 nanosleep (&ts, 0);
802#elif defined(_WIN32) 1922#elif defined _WIN32
1923 /* maybe this should round up, as ms is very low resolution */
1924 /* compared to select (µs) or nanosleep (ns) */
803 Sleep ((unsigned long)(delay * 1e3)); 1925 Sleep ((unsigned long)(delay * 1e3));
804#else 1926#else
805 struct timeval tv; 1927 struct timeval tv;
806 1928
807 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1929 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
826 1948
827 do 1949 do
828 ncur <<= 1; 1950 ncur <<= 1;
829 while (cnt > ncur); 1951 while (cnt > ncur);
830 1952
831 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1953 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
832 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1954 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
833 { 1955 {
834 ncur *= elem; 1956 ncur *= elem;
835 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1957 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
836 ncur = ncur - sizeof (void *) * 4; 1958 ncur = ncur - sizeof (void *) * 4;
… …
838 } 1960 }
839 1961
840 return ncur; 1962 return ncur;
841} 1963}
842 1964
843static noinline void * 1965noinline ecb_cold
1966static void *
844array_realloc (int elem, void *base, int *cur, int cnt) 1967array_realloc (int elem, void *base, int *cur, int cnt)
845{ 1968{
846 *cur = array_nextsize (elem, *cur, cnt); 1969 *cur = array_nextsize (elem, *cur, cnt);
847 return ev_realloc (base, elem * *cur); 1970 return ev_realloc (base, elem * *cur);
848} 1971}
849 1972
1973#define array_needsize_noinit(base,count)
1974
850#define array_init_zero(base,count) \ 1975#define array_needsize_zerofill(base,count) \
851 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1976 memset ((void *)(base), 0, sizeof (*(base)) * (count))
852 1977
853#define array_needsize(type,base,cur,cnt,init) \ 1978#define array_needsize(type,base,cur,cnt,init) \
854 if (expect_false ((cnt) > (cur))) \ 1979 if (expect_false ((cnt) > (cur))) \
855 { \ 1980 { \
856 int ocur_ = (cur); \ 1981 ecb_unused int ocur_ = (cur); \
857 (base) = (type *)array_realloc \ 1982 (base) = (type *)array_realloc \
858 (sizeof (type), (base), &(cur), (cnt)); \ 1983 (sizeof (type), (base), &(cur), (cnt)); \
859 init ((base) + (ocur_), (cur) - ocur_); \ 1984 init ((base) + (ocur_), (cur) - ocur_); \
860 } 1985 }
861 1986
… …
873 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 1998 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
874 1999
875/*****************************************************************************/ 2000/*****************************************************************************/
876 2001
877/* dummy callback for pending events */ 2002/* dummy callback for pending events */
878static void noinline 2003noinline
2004static void
879pendingcb (EV_P_ ev_prepare *w, int revents) 2005pendingcb (EV_P_ ev_prepare *w, int revents)
880{ 2006{
881} 2007}
882 2008
883void noinline 2009noinline
2010void
884ev_feed_event (EV_P_ void *w, int revents) 2011ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
885{ 2012{
886 W w_ = (W)w; 2013 W w_ = (W)w;
887 int pri = ABSPRI (w_); 2014 int pri = ABSPRI (w_);
888 2015
889 if (expect_false (w_->pending)) 2016 if (expect_false (w_->pending))
890 pendings [pri][w_->pending - 1].events |= revents; 2017 pendings [pri][w_->pending - 1].events |= revents;
891 else 2018 else
892 { 2019 {
893 w_->pending = ++pendingcnt [pri]; 2020 w_->pending = ++pendingcnt [pri];
894 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2021 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
895 pendings [pri][w_->pending - 1].w = w_; 2022 pendings [pri][w_->pending - 1].w = w_;
896 pendings [pri][w_->pending - 1].events = revents; 2023 pendings [pri][w_->pending - 1].events = revents;
897 } 2024 }
2025
2026 pendingpri = NUMPRI - 1;
898} 2027}
899 2028
900inline_speed void 2029inline_speed void
901feed_reverse (EV_P_ W w) 2030feed_reverse (EV_P_ W w)
902{ 2031{
903 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2032 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
904 rfeeds [rfeedcnt++] = w; 2033 rfeeds [rfeedcnt++] = w;
905} 2034}
906 2035
907inline_size void 2036inline_size void
908feed_reverse_done (EV_P_ int revents) 2037feed_reverse_done (EV_P_ int revents)
… …
948 if (expect_true (!anfd->reify)) 2077 if (expect_true (!anfd->reify))
949 fd_event_nocheck (EV_A_ fd, revents); 2078 fd_event_nocheck (EV_A_ fd, revents);
950} 2079}
951 2080
952void 2081void
953ev_feed_fd_event (EV_P_ int fd, int revents) 2082ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
954{ 2083{
955 if (fd >= 0 && fd < anfdmax) 2084 if (fd >= 0 && fd < anfdmax)
956 fd_event_nocheck (EV_A_ fd, revents); 2085 fd_event_nocheck (EV_A_ fd, revents);
957} 2086}
958 2087
… …
961inline_size void 2090inline_size void
962fd_reify (EV_P) 2091fd_reify (EV_P)
963{ 2092{
964 int i; 2093 int i;
965 2094
2095#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2096 for (i = 0; i < fdchangecnt; ++i)
2097 {
2098 int fd = fdchanges [i];
2099 ANFD *anfd = anfds + fd;
2100
2101 if (anfd->reify & EV__IOFDSET && anfd->head)
2102 {
2103 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2104
2105 if (handle != anfd->handle)
2106 {
2107 unsigned long arg;
2108
2109 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2110
2111 /* handle changed, but fd didn't - we need to do it in two steps */
2112 backend_modify (EV_A_ fd, anfd->events, 0);
2113 anfd->events = 0;
2114 anfd->handle = handle;
2115 }
2116 }
2117 }
2118#endif
2119
966 for (i = 0; i < fdchangecnt; ++i) 2120 for (i = 0; i < fdchangecnt; ++i)
967 { 2121 {
968 int fd = fdchanges [i]; 2122 int fd = fdchanges [i];
969 ANFD *anfd = anfds + fd; 2123 ANFD *anfd = anfds + fd;
970 ev_io *w; 2124 ev_io *w;
… …
972 unsigned char o_events = anfd->events; 2126 unsigned char o_events = anfd->events;
973 unsigned char o_reify = anfd->reify; 2127 unsigned char o_reify = anfd->reify;
974 2128
975 anfd->reify = 0; 2129 anfd->reify = 0;
976 2130
977#if EV_SELECT_IS_WINSOCKET
978 if (o_reify & EV__IOFDSET)
979 {
980 unsigned long arg;
981 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
982 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
983 }
984#endif
985
986 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2131 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
987 { 2132 {
988 anfd->events = 0; 2133 anfd->events = 0;
989 2134
990 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2135 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1000 2145
1001 fdchangecnt = 0; 2146 fdchangecnt = 0;
1002} 2147}
1003 2148
1004/* something about the given fd changed */ 2149/* something about the given fd changed */
1005inline_size void 2150inline_size
2151void
1006fd_change (EV_P_ int fd, int flags) 2152fd_change (EV_P_ int fd, int flags)
1007{ 2153{
1008 unsigned char reify = anfds [fd].reify; 2154 unsigned char reify = anfds [fd].reify;
1009 anfds [fd].reify |= flags; 2155 anfds [fd].reify |= flags;
1010 2156
1011 if (expect_true (!reify)) 2157 if (expect_true (!reify))
1012 { 2158 {
1013 ++fdchangecnt; 2159 ++fdchangecnt;
1014 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2160 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
1015 fdchanges [fdchangecnt - 1] = fd; 2161 fdchanges [fdchangecnt - 1] = fd;
1016 } 2162 }
1017} 2163}
1018 2164
1019/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2165/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1020inline_speed void 2166inline_speed ecb_cold void
1021fd_kill (EV_P_ int fd) 2167fd_kill (EV_P_ int fd)
1022{ 2168{
1023 ev_io *w; 2169 ev_io *w;
1024 2170
1025 while ((w = (ev_io *)anfds [fd].head)) 2171 while ((w = (ev_io *)anfds [fd].head))
… …
1028 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2174 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1029 } 2175 }
1030} 2176}
1031 2177
1032/* check whether the given fd is actually valid, for error recovery */ 2178/* check whether the given fd is actually valid, for error recovery */
1033inline_size int 2179inline_size ecb_cold int
1034fd_valid (int fd) 2180fd_valid (int fd)
1035{ 2181{
1036#ifdef _WIN32 2182#ifdef _WIN32
1037 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2183 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1038#else 2184#else
1039 return fcntl (fd, F_GETFD) != -1; 2185 return fcntl (fd, F_GETFD) != -1;
1040#endif 2186#endif
1041} 2187}
1042 2188
1043/* called on EBADF to verify fds */ 2189/* called on EBADF to verify fds */
1044static void noinline 2190noinline ecb_cold
2191static void
1045fd_ebadf (EV_P) 2192fd_ebadf (EV_P)
1046{ 2193{
1047 int fd; 2194 int fd;
1048 2195
1049 for (fd = 0; fd < anfdmax; ++fd) 2196 for (fd = 0; fd < anfdmax; ++fd)
… …
1051 if (!fd_valid (fd) && errno == EBADF) 2198 if (!fd_valid (fd) && errno == EBADF)
1052 fd_kill (EV_A_ fd); 2199 fd_kill (EV_A_ fd);
1053} 2200}
1054 2201
1055/* called on ENOMEM in select/poll to kill some fds and retry */ 2202/* called on ENOMEM in select/poll to kill some fds and retry */
1056static void noinline 2203noinline ecb_cold
2204static void
1057fd_enomem (EV_P) 2205fd_enomem (EV_P)
1058{ 2206{
1059 int fd; 2207 int fd;
1060 2208
1061 for (fd = anfdmax; fd--; ) 2209 for (fd = anfdmax; fd--; )
… …
1065 break; 2213 break;
1066 } 2214 }
1067} 2215}
1068 2216
1069/* usually called after fork if backend needs to re-arm all fds from scratch */ 2217/* usually called after fork if backend needs to re-arm all fds from scratch */
1070static void noinline 2218noinline
2219static void
1071fd_rearm_all (EV_P) 2220fd_rearm_all (EV_P)
1072{ 2221{
1073 int fd; 2222 int fd;
1074 2223
1075 for (fd = 0; fd < anfdmax; ++fd) 2224 for (fd = 0; fd < anfdmax; ++fd)
… …
1256 2405
1257/*****************************************************************************/ 2406/*****************************************************************************/
1258 2407
1259#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2408#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1260 2409
1261static void noinline 2410noinline ecb_cold
2411static void
1262evpipe_init (EV_P) 2412evpipe_init (EV_P)
1263{ 2413{
1264 if (!ev_is_active (&pipe_w)) 2414 if (!ev_is_active (&pipe_w))
1265 { 2415 {
2416 int fds [2];
2417
1266# if EV_USE_EVENTFD 2418# if EV_USE_EVENTFD
2419 fds [0] = -1;
1267 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2420 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1268 if (evfd < 0 && errno == EINVAL) 2421 if (fds [1] < 0 && errno == EINVAL)
1269 evfd = eventfd (0, 0); 2422 fds [1] = eventfd (0, 0);
1270 2423
1271 if (evfd >= 0) 2424 if (fds [1] < 0)
2425# endif
1272 { 2426 {
2427 while (pipe (fds))
2428 ev_syserr ("(libev) error creating signal/async pipe");
2429
2430 fd_intern (fds [0]);
2431 }
2432
1273 evpipe [0] = -1; 2433 evpipe [0] = fds [0];
1274 fd_intern (evfd); /* doing it twice doesn't hurt */ 2434
1275 ev_io_set (&pipe_w, evfd, EV_READ); 2435 if (evpipe [1] < 0)
2436 evpipe [1] = fds [1]; /* first call, set write fd */
2437 else
2438 {
2439 /* on subsequent calls, do not change evpipe [1] */
2440 /* so that evpipe_write can always rely on its value. */
2441 /* this branch does not do anything sensible on windows, */
2442 /* so must not be executed on windows */
2443
2444 dup2 (fds [1], evpipe [1]);
2445 close (fds [1]);
2446 }
2447
2448 fd_intern (evpipe [1]);
2449
2450 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2451 ev_io_start (EV_A_ &pipe_w);
2452 ev_unref (EV_A); /* watcher should not keep loop alive */
2453 }
2454}
2455
2456inline_speed void
2457evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2458{
2459 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2460
2461 if (expect_true (*flag))
2462 return;
2463
2464 *flag = 1;
2465 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2466
2467 pipe_write_skipped = 1;
2468
2469 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2470
2471 if (pipe_write_wanted)
2472 {
2473 int old_errno;
2474
2475 pipe_write_skipped = 0;
2476 ECB_MEMORY_FENCE_RELEASE;
2477
2478 old_errno = errno; /* save errno because write will clobber it */
2479
2480#if EV_USE_EVENTFD
2481 if (evpipe [0] < 0)
2482 {
2483 uint64_t counter = 1;
2484 write (evpipe [1], &counter, sizeof (uint64_t));
1276 } 2485 }
1277 else 2486 else
1278# endif 2487#endif
1279 { 2488 {
1280 while (pipe (evpipe)) 2489#ifdef _WIN32
1281 ev_syserr ("(libev) error creating signal/async pipe"); 2490 WSABUF buf;
1282 2491 DWORD sent;
1283 fd_intern (evpipe [0]); 2492 buf.buf = (char *)&buf;
1284 fd_intern (evpipe [1]); 2493 buf.len = 1;
1285 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2494 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2495#else
2496 write (evpipe [1], &(evpipe [1]), 1);
2497#endif
1286 } 2498 }
1287
1288 ev_io_start (EV_A_ &pipe_w);
1289 ev_unref (EV_A); /* watcher should not keep loop alive */
1290 }
1291}
1292
1293inline_size void
1294evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1295{
1296 if (!*flag)
1297 {
1298 int old_errno = errno; /* save errno because write might clobber it */
1299 char dummy;
1300
1301 *flag = 1;
1302
1303#if EV_USE_EVENTFD
1304 if (evfd >= 0)
1305 {
1306 uint64_t counter = 1;
1307 write (evfd, &counter, sizeof (uint64_t));
1308 }
1309 else
1310#endif
1311 /* win32 people keep sending patches that change this write() to send() */
1312 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1313 /* so when you think this write should be a send instead, please find out */
1314 /* where your send() is from - it's definitely not the microsoft send, and */
1315 /* tell me. thank you. */
1316 write (evpipe [1], &dummy, 1);
1317 2499
1318 errno = old_errno; 2500 errno = old_errno;
1319 } 2501 }
1320} 2502}
1321 2503
… …
1324static void 2506static void
1325pipecb (EV_P_ ev_io *iow, int revents) 2507pipecb (EV_P_ ev_io *iow, int revents)
1326{ 2508{
1327 int i; 2509 int i;
1328 2510
2511 if (revents & EV_READ)
2512 {
1329#if EV_USE_EVENTFD 2513#if EV_USE_EVENTFD
1330 if (evfd >= 0) 2514 if (evpipe [0] < 0)
1331 { 2515 {
1332 uint64_t counter; 2516 uint64_t counter;
1333 read (evfd, &counter, sizeof (uint64_t)); 2517 read (evpipe [1], &counter, sizeof (uint64_t));
1334 } 2518 }
1335 else 2519 else
1336#endif 2520#endif
1337 { 2521 {
1338 char dummy; 2522 char dummy[4];
1339 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2523#ifdef _WIN32
2524 WSABUF buf;
2525 DWORD recvd;
2526 DWORD flags = 0;
2527 buf.buf = dummy;
2528 buf.len = sizeof (dummy);
2529 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2530#else
1340 read (evpipe [0], &dummy, 1); 2531 read (evpipe [0], &dummy, sizeof (dummy));
2532#endif
2533 }
1341 } 2534 }
1342 2535
2536 pipe_write_skipped = 0;
2537
2538 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2539
2540#if EV_SIGNAL_ENABLE
1343 if (sig_pending) 2541 if (sig_pending)
1344 { 2542 {
1345 sig_pending = 0; 2543 sig_pending = 0;
2544
2545 ECB_MEMORY_FENCE;
1346 2546
1347 for (i = EV_NSIG - 1; i--; ) 2547 for (i = EV_NSIG - 1; i--; )
1348 if (expect_false (signals [i].pending)) 2548 if (expect_false (signals [i].pending))
1349 ev_feed_signal_event (EV_A_ i + 1); 2549 ev_feed_signal_event (EV_A_ i + 1);
1350 } 2550 }
2551#endif
1351 2552
1352#if EV_ASYNC_ENABLE 2553#if EV_ASYNC_ENABLE
1353 if (async_pending) 2554 if (async_pending)
1354 { 2555 {
1355 async_pending = 0; 2556 async_pending = 0;
2557
2558 ECB_MEMORY_FENCE;
1356 2559
1357 for (i = asynccnt; i--; ) 2560 for (i = asynccnt; i--; )
1358 if (asyncs [i]->sent) 2561 if (asyncs [i]->sent)
1359 { 2562 {
1360 asyncs [i]->sent = 0; 2563 asyncs [i]->sent = 0;
2564 ECB_MEMORY_FENCE_RELEASE;
1361 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2565 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1362 } 2566 }
1363 } 2567 }
1364#endif 2568#endif
1365} 2569}
1366 2570
1367/*****************************************************************************/ 2571/*****************************************************************************/
1368 2572
2573void
2574ev_feed_signal (int signum) EV_NOEXCEPT
2575{
2576#if EV_MULTIPLICITY
2577 EV_P;
2578 ECB_MEMORY_FENCE_ACQUIRE;
2579 EV_A = signals [signum - 1].loop;
2580
2581 if (!EV_A)
2582 return;
2583#endif
2584
2585 signals [signum - 1].pending = 1;
2586 evpipe_write (EV_A_ &sig_pending);
2587}
2588
1369static void 2589static void
1370ev_sighandler (int signum) 2590ev_sighandler (int signum)
1371{ 2591{
1372#if EV_MULTIPLICITY
1373 EV_P = signals [signum - 1].loop;
1374#endif
1375
1376#ifdef _WIN32 2592#ifdef _WIN32
1377 signal (signum, ev_sighandler); 2593 signal (signum, ev_sighandler);
1378#endif 2594#endif
1379 2595
1380 signals [signum - 1].pending = 1; 2596 ev_feed_signal (signum);
1381 evpipe_write (EV_A_ &sig_pending);
1382} 2597}
1383 2598
1384void noinline 2599noinline
2600void
1385ev_feed_signal_event (EV_P_ int signum) 2601ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1386{ 2602{
1387 WL w; 2603 WL w;
1388 2604
1389 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2605 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1390 return; 2606 return;
1391 2607
1392 --signum; 2608 --signum;
1393 2609
1394#if EV_MULTIPLICITY 2610#if EV_MULTIPLICITY
… …
1398 if (expect_false (signals [signum].loop != EV_A)) 2614 if (expect_false (signals [signum].loop != EV_A))
1399 return; 2615 return;
1400#endif 2616#endif
1401 2617
1402 signals [signum].pending = 0; 2618 signals [signum].pending = 0;
2619 ECB_MEMORY_FENCE_RELEASE;
1403 2620
1404 for (w = signals [signum].head; w; w = w->next) 2621 for (w = signals [signum].head; w; w = w->next)
1405 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2622 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1406} 2623}
1407 2624
… …
1486 2703
1487#endif 2704#endif
1488 2705
1489/*****************************************************************************/ 2706/*****************************************************************************/
1490 2707
2708#if EV_USE_IOCP
2709# include "ev_iocp.c"
2710#endif
1491#if EV_USE_PORT 2711#if EV_USE_PORT
1492# include "ev_port.c" 2712# include "ev_port.c"
1493#endif 2713#endif
1494#if EV_USE_KQUEUE 2714#if EV_USE_KQUEUE
1495# include "ev_kqueue.c" 2715# include "ev_kqueue.c"
1496#endif 2716#endif
2717#if EV_USE_LINUXAIO
2718# include "ev_linuxaio.c"
2719#endif
1497#if EV_USE_EPOLL 2720#if EV_USE_EPOLL
1498# include "ev_epoll.c" 2721# include "ev_epoll.c"
1499#endif 2722#endif
1500#if EV_USE_POLL 2723#if EV_USE_POLL
1501# include "ev_poll.c" 2724# include "ev_poll.c"
1502#endif 2725#endif
1503#if EV_USE_SELECT 2726#if EV_USE_SELECT
1504# include "ev_select.c" 2727# include "ev_select.c"
1505#endif 2728#endif
1506 2729
1507int 2730ecb_cold int
1508ev_version_major (void) 2731ev_version_major (void) EV_NOEXCEPT
1509{ 2732{
1510 return EV_VERSION_MAJOR; 2733 return EV_VERSION_MAJOR;
1511} 2734}
1512 2735
1513int 2736ecb_cold int
1514ev_version_minor (void) 2737ev_version_minor (void) EV_NOEXCEPT
1515{ 2738{
1516 return EV_VERSION_MINOR; 2739 return EV_VERSION_MINOR;
1517} 2740}
1518 2741
1519/* return true if we are running with elevated privileges and should ignore env variables */ 2742/* return true if we are running with elevated privileges and should ignore env variables */
1520int inline_size 2743inline_size ecb_cold int
1521enable_secure (void) 2744enable_secure (void)
1522{ 2745{
1523#ifdef _WIN32 2746#ifdef _WIN32
1524 return 0; 2747 return 0;
1525#else 2748#else
1526 return getuid () != geteuid () 2749 return getuid () != geteuid ()
1527 || getgid () != getegid (); 2750 || getgid () != getegid ();
1528#endif 2751#endif
1529} 2752}
1530 2753
2754ecb_cold
1531unsigned int 2755unsigned int
1532ev_supported_backends (void) 2756ev_supported_backends (void) EV_NOEXCEPT
1533{ 2757{
1534 unsigned int flags = 0; 2758 unsigned int flags = 0;
1535 2759
1536 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2760 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1537 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2761 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1538 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2762 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2763 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
1539 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2764 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1540 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2765 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1541 2766
1542 return flags; 2767 return flags;
1543} 2768}
1544 2769
2770ecb_cold
1545unsigned int 2771unsigned int
1546ev_recommended_backends (void) 2772ev_recommended_backends (void) EV_NOEXCEPT
1547{ 2773{
1548 unsigned int flags = ev_supported_backends (); 2774 unsigned int flags = ev_supported_backends ();
1549 2775
1550#ifndef __NetBSD__ 2776#ifndef __NetBSD__
1551 /* kqueue is borked on everything but netbsd apparently */ 2777 /* kqueue is borked on everything but netbsd apparently */
… …
1562#endif 2788#endif
1563 2789
1564 return flags; 2790 return flags;
1565} 2791}
1566 2792
2793ecb_cold
1567unsigned int 2794unsigned int
1568ev_embeddable_backends (void) 2795ev_embeddable_backends (void) EV_NOEXCEPT
1569{ 2796{
1570 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2797 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1571 2798
1572 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2799 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1573 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2800 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1575 2802
1576 return flags; 2803 return flags;
1577} 2804}
1578 2805
1579unsigned int 2806unsigned int
1580ev_backend (EV_P) 2807ev_backend (EV_P) EV_NOEXCEPT
1581{ 2808{
1582 return backend; 2809 return backend;
1583} 2810}
1584 2811
1585#if EV_FEATURE_API 2812#if EV_FEATURE_API
1586unsigned int 2813unsigned int
1587ev_iteration (EV_P) 2814ev_iteration (EV_P) EV_NOEXCEPT
1588{ 2815{
1589 return loop_count; 2816 return loop_count;
1590} 2817}
1591 2818
1592unsigned int 2819unsigned int
1593ev_depth (EV_P) 2820ev_depth (EV_P) EV_NOEXCEPT
1594{ 2821{
1595 return loop_depth; 2822 return loop_depth;
1596} 2823}
1597 2824
1598void 2825void
1599ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2826ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1600{ 2827{
1601 io_blocktime = interval; 2828 io_blocktime = interval;
1602} 2829}
1603 2830
1604void 2831void
1605ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2832ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1606{ 2833{
1607 timeout_blocktime = interval; 2834 timeout_blocktime = interval;
1608} 2835}
1609 2836
1610void 2837void
1611ev_set_userdata (EV_P_ void *data) 2838ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1612{ 2839{
1613 userdata = data; 2840 userdata = data;
1614} 2841}
1615 2842
1616void * 2843void *
1617ev_userdata (EV_P) 2844ev_userdata (EV_P) EV_NOEXCEPT
1618{ 2845{
1619 return userdata; 2846 return userdata;
1620} 2847}
1621 2848
2849void
1622void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2850ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1623{ 2851{
1624 invoke_cb = invoke_pending_cb; 2852 invoke_cb = invoke_pending_cb;
1625} 2853}
1626 2854
2855void
1627void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2856ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1628{ 2857{
1629 release_cb = release; 2858 release_cb = release;
1630 acquire_cb = acquire; 2859 acquire_cb = acquire;
1631} 2860}
1632#endif 2861#endif
1633 2862
1634/* initialise a loop structure, must be zero-initialised */ 2863/* initialise a loop structure, must be zero-initialised */
1635static void noinline 2864noinline ecb_cold
2865static void
1636loop_init (EV_P_ unsigned int flags) 2866loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1637{ 2867{
1638 if (!backend) 2868 if (!backend)
1639 { 2869 {
2870 origflags = flags;
2871
1640#if EV_USE_REALTIME 2872#if EV_USE_REALTIME
1641 if (!have_realtime) 2873 if (!have_realtime)
1642 { 2874 {
1643 struct timespec ts; 2875 struct timespec ts;
1644 2876
… …
1666 if (!(flags & EVFLAG_NOENV) 2898 if (!(flags & EVFLAG_NOENV)
1667 && !enable_secure () 2899 && !enable_secure ()
1668 && getenv ("LIBEV_FLAGS")) 2900 && getenv ("LIBEV_FLAGS"))
1669 flags = atoi (getenv ("LIBEV_FLAGS")); 2901 flags = atoi (getenv ("LIBEV_FLAGS"));
1670 2902
1671 ev_rt_now = ev_time (); 2903 ev_rt_now = ev_time ();
1672 mn_now = get_clock (); 2904 mn_now = get_clock ();
1673 now_floor = mn_now; 2905 now_floor = mn_now;
1674 rtmn_diff = ev_rt_now - mn_now; 2906 rtmn_diff = ev_rt_now - mn_now;
1675#if EV_FEATURE_API 2907#if EV_FEATURE_API
1676 invoke_cb = ev_invoke_pending; 2908 invoke_cb = ev_invoke_pending;
1677#endif 2909#endif
1678 2910
1679 io_blocktime = 0.; 2911 io_blocktime = 0.;
1680 timeout_blocktime = 0.; 2912 timeout_blocktime = 0.;
1681 backend = 0; 2913 backend = 0;
1682 backend_fd = -1; 2914 backend_fd = -1;
1683 sig_pending = 0; 2915 sig_pending = 0;
1684#if EV_ASYNC_ENABLE 2916#if EV_ASYNC_ENABLE
1685 async_pending = 0; 2917 async_pending = 0;
1686#endif 2918#endif
2919 pipe_write_skipped = 0;
2920 pipe_write_wanted = 0;
2921 evpipe [0] = -1;
2922 evpipe [1] = -1;
1687#if EV_USE_INOTIFY 2923#if EV_USE_INOTIFY
1688 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2924 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1689#endif 2925#endif
1690#if EV_USE_SIGNALFD 2926#if EV_USE_SIGNALFD
1691 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2927 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1692#endif 2928#endif
1693 2929
1694 if (!(flags & 0x0000ffffU)) 2930 if (!(flags & EVBACKEND_MASK))
1695 flags |= ev_recommended_backends (); 2931 flags |= ev_recommended_backends ();
1696 2932
2933#if EV_USE_IOCP
2934 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2935#endif
1697#if EV_USE_PORT 2936#if EV_USE_PORT
1698 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2937 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1699#endif 2938#endif
1700#if EV_USE_KQUEUE 2939#if EV_USE_KQUEUE
1701 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2940 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
2941#endif
2942#if EV_USE_LINUXAIO
2943 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1702#endif 2944#endif
1703#if EV_USE_EPOLL 2945#if EV_USE_EPOLL
1704 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 2946 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1705#endif 2947#endif
1706#if EV_USE_POLL 2948#if EV_USE_POLL
1707 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 2949 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1708#endif 2950#endif
1709#if EV_USE_SELECT 2951#if EV_USE_SELECT
1710 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2952 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1711#endif 2953#endif
1712 2954
1713 ev_prepare_init (&pending_w, pendingcb); 2955 ev_prepare_init (&pending_w, pendingcb);
1714 2956
1715#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2957#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1718#endif 2960#endif
1719 } 2961 }
1720} 2962}
1721 2963
1722/* free up a loop structure */ 2964/* free up a loop structure */
1723static void noinline 2965ecb_cold
2966void
1724loop_destroy (EV_P) 2967ev_loop_destroy (EV_P)
1725{ 2968{
1726 int i; 2969 int i;
2970
2971#if EV_MULTIPLICITY
2972 /* mimic free (0) */
2973 if (!EV_A)
2974 return;
2975#endif
2976
2977#if EV_CLEANUP_ENABLE
2978 /* queue cleanup watchers (and execute them) */
2979 if (expect_false (cleanupcnt))
2980 {
2981 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2982 EV_INVOKE_PENDING;
2983 }
2984#endif
2985
2986#if EV_CHILD_ENABLE
2987 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2988 {
2989 ev_ref (EV_A); /* child watcher */
2990 ev_signal_stop (EV_A_ &childev);
2991 }
2992#endif
1727 2993
1728 if (ev_is_active (&pipe_w)) 2994 if (ev_is_active (&pipe_w))
1729 { 2995 {
1730 /*ev_ref (EV_A);*/ 2996 /*ev_ref (EV_A);*/
1731 /*ev_io_stop (EV_A_ &pipe_w);*/ 2997 /*ev_io_stop (EV_A_ &pipe_w);*/
1732 2998
1733#if EV_USE_EVENTFD
1734 if (evfd >= 0)
1735 close (evfd);
1736#endif
1737
1738 if (evpipe [0] >= 0)
1739 {
1740 EV_WIN32_CLOSE_FD (evpipe [0]); 2999 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1741 EV_WIN32_CLOSE_FD (evpipe [1]); 3000 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1742 }
1743 } 3001 }
1744 3002
1745#if EV_USE_SIGNALFD 3003#if EV_USE_SIGNALFD
1746 if (ev_is_active (&sigfd_w)) 3004 if (ev_is_active (&sigfd_w))
1747 close (sigfd); 3005 close (sigfd);
… …
1753#endif 3011#endif
1754 3012
1755 if (backend_fd >= 0) 3013 if (backend_fd >= 0)
1756 close (backend_fd); 3014 close (backend_fd);
1757 3015
3016#if EV_USE_IOCP
3017 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3018#endif
1758#if EV_USE_PORT 3019#if EV_USE_PORT
1759 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3020 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1760#endif 3021#endif
1761#if EV_USE_KQUEUE 3022#if EV_USE_KQUEUE
1762 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3023 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3024#endif
3025#if EV_USE_LINUXAIO
3026 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1763#endif 3027#endif
1764#if EV_USE_EPOLL 3028#if EV_USE_EPOLL
1765 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3029 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1766#endif 3030#endif
1767#if EV_USE_POLL 3031#if EV_USE_POLL
1768 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3032 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1769#endif 3033#endif
1770#if EV_USE_SELECT 3034#if EV_USE_SELECT
1771 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3035 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1772#endif 3036#endif
1773 3037
1774 for (i = NUMPRI; i--; ) 3038 for (i = NUMPRI; i--; )
1775 { 3039 {
1776 array_free (pending, [i]); 3040 array_free (pending, [i]);
… …
1789 array_free (periodic, EMPTY); 3053 array_free (periodic, EMPTY);
1790#endif 3054#endif
1791#if EV_FORK_ENABLE 3055#if EV_FORK_ENABLE
1792 array_free (fork, EMPTY); 3056 array_free (fork, EMPTY);
1793#endif 3057#endif
3058#if EV_CLEANUP_ENABLE
3059 array_free (cleanup, EMPTY);
3060#endif
1794 array_free (prepare, EMPTY); 3061 array_free (prepare, EMPTY);
1795 array_free (check, EMPTY); 3062 array_free (check, EMPTY);
1796#if EV_ASYNC_ENABLE 3063#if EV_ASYNC_ENABLE
1797 array_free (async, EMPTY); 3064 array_free (async, EMPTY);
1798#endif 3065#endif
1799 3066
1800 backend = 0; 3067 backend = 0;
3068
3069#if EV_MULTIPLICITY
3070 if (ev_is_default_loop (EV_A))
3071#endif
3072 ev_default_loop_ptr = 0;
3073#if EV_MULTIPLICITY
3074 else
3075 ev_free (EV_A);
3076#endif
1801} 3077}
1802 3078
1803#if EV_USE_INOTIFY 3079#if EV_USE_INOTIFY
1804inline_size void infy_fork (EV_P); 3080inline_size void infy_fork (EV_P);
1805#endif 3081#endif
1806 3082
1807inline_size void 3083inline_size void
1808loop_fork (EV_P) 3084loop_fork (EV_P)
1809{ 3085{
1810#if EV_USE_PORT 3086#if EV_USE_PORT
1811 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3087 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1812#endif 3088#endif
1813#if EV_USE_KQUEUE 3089#if EV_USE_KQUEUE
1814 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3090 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3091#endif
3092#if EV_USE_LINUXAIO
3093 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1815#endif 3094#endif
1816#if EV_USE_EPOLL 3095#if EV_USE_EPOLL
1817 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3096 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1818#endif 3097#endif
1819#if EV_USE_INOTIFY 3098#if EV_USE_INOTIFY
1820 infy_fork (EV_A); 3099 infy_fork (EV_A);
1821#endif 3100#endif
1822 3101
3102#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1823 if (ev_is_active (&pipe_w)) 3103 if (ev_is_active (&pipe_w) && postfork != 2)
1824 { 3104 {
1825 /* this "locks" the handlers against writing to the pipe */ 3105 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1826 /* while we modify the fd vars */
1827 sig_pending = 1;
1828#if EV_ASYNC_ENABLE
1829 async_pending = 1;
1830#endif
1831 3106
1832 ev_ref (EV_A); 3107 ev_ref (EV_A);
1833 ev_io_stop (EV_A_ &pipe_w); 3108 ev_io_stop (EV_A_ &pipe_w);
1834 3109
1835#if EV_USE_EVENTFD
1836 if (evfd >= 0)
1837 close (evfd);
1838#endif
1839
1840 if (evpipe [0] >= 0) 3110 if (evpipe [0] >= 0)
1841 {
1842 EV_WIN32_CLOSE_FD (evpipe [0]); 3111 EV_WIN32_CLOSE_FD (evpipe [0]);
1843 EV_WIN32_CLOSE_FD (evpipe [1]);
1844 }
1845 3112
1846#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1847 evpipe_init (EV_A); 3113 evpipe_init (EV_A);
1848 /* now iterate over everything, in case we missed something */ 3114 /* iterate over everything, in case we missed something before */
1849 pipecb (EV_A_ &pipe_w, EV_READ); 3115 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1850#endif
1851 } 3116 }
3117#endif
1852 3118
1853 postfork = 0; 3119 postfork = 0;
1854} 3120}
1855 3121
1856#if EV_MULTIPLICITY 3122#if EV_MULTIPLICITY
1857 3123
3124ecb_cold
1858struct ev_loop * 3125struct ev_loop *
1859ev_loop_new (unsigned int flags) 3126ev_loop_new (unsigned int flags) EV_NOEXCEPT
1860{ 3127{
1861 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3128 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1862 3129
1863 memset (EV_A, 0, sizeof (struct ev_loop)); 3130 memset (EV_A, 0, sizeof (struct ev_loop));
1864 loop_init (EV_A_ flags); 3131 loop_init (EV_A_ flags);
1865 3132
1866 if (ev_backend (EV_A)) 3133 if (ev_backend (EV_A))
1867 return EV_A; 3134 return EV_A;
1868 3135
3136 ev_free (EV_A);
1869 return 0; 3137 return 0;
1870} 3138}
1871 3139
1872void
1873ev_loop_destroy (EV_P)
1874{
1875 loop_destroy (EV_A);
1876 ev_free (loop);
1877}
1878
1879void
1880ev_loop_fork (EV_P)
1881{
1882 postfork = 1; /* must be in line with ev_default_fork */
1883}
1884#endif /* multiplicity */ 3140#endif /* multiplicity */
1885 3141
1886#if EV_VERIFY 3142#if EV_VERIFY
1887static void noinline 3143noinline ecb_cold
3144static void
1888verify_watcher (EV_P_ W w) 3145verify_watcher (EV_P_ W w)
1889{ 3146{
1890 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3147 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1891 3148
1892 if (w->pending) 3149 if (w->pending)
1893 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3150 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1894} 3151}
1895 3152
1896static void noinline 3153noinline ecb_cold
3154static void
1897verify_heap (EV_P_ ANHE *heap, int N) 3155verify_heap (EV_P_ ANHE *heap, int N)
1898{ 3156{
1899 int i; 3157 int i;
1900 3158
1901 for (i = HEAP0; i < N + HEAP0; ++i) 3159 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1906 3164
1907 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3165 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1908 } 3166 }
1909} 3167}
1910 3168
1911static void noinline 3169noinline ecb_cold
3170static void
1912array_verify (EV_P_ W *ws, int cnt) 3171array_verify (EV_P_ W *ws, int cnt)
1913{ 3172{
1914 while (cnt--) 3173 while (cnt--)
1915 { 3174 {
1916 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3175 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1918 } 3177 }
1919} 3178}
1920#endif 3179#endif
1921 3180
1922#if EV_FEATURE_API 3181#if EV_FEATURE_API
1923void 3182void ecb_cold
1924ev_verify (EV_P) 3183ev_verify (EV_P) EV_NOEXCEPT
1925{ 3184{
1926#if EV_VERIFY 3185#if EV_VERIFY
1927 int i; 3186 int i;
1928 WL w; 3187 WL w, w2;
1929 3188
1930 assert (activecnt >= -1); 3189 assert (activecnt >= -1);
1931 3190
1932 assert (fdchangemax >= fdchangecnt); 3191 assert (fdchangemax >= fdchangecnt);
1933 for (i = 0; i < fdchangecnt; ++i) 3192 for (i = 0; i < fdchangecnt; ++i)
1934 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3193 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1935 3194
1936 assert (anfdmax >= 0); 3195 assert (anfdmax >= 0);
1937 for (i = 0; i < anfdmax; ++i) 3196 for (i = 0; i < anfdmax; ++i)
3197 {
3198 int j = 0;
3199
1938 for (w = anfds [i].head; w; w = w->next) 3200 for (w = w2 = anfds [i].head; w; w = w->next)
1939 { 3201 {
1940 verify_watcher (EV_A_ (W)w); 3202 verify_watcher (EV_A_ (W)w);
3203
3204 if (j++ & 1)
3205 {
3206 assert (("libev: io watcher list contains a loop", w != w2));
3207 w2 = w2->next;
3208 }
3209
1941 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3210 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1942 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3211 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1943 } 3212 }
3213 }
1944 3214
1945 assert (timermax >= timercnt); 3215 assert (timermax >= timercnt);
1946 verify_heap (EV_A_ timers, timercnt); 3216 verify_heap (EV_A_ timers, timercnt);
1947 3217
1948#if EV_PERIODIC_ENABLE 3218#if EV_PERIODIC_ENABLE
… …
1963#if EV_FORK_ENABLE 3233#if EV_FORK_ENABLE
1964 assert (forkmax >= forkcnt); 3234 assert (forkmax >= forkcnt);
1965 array_verify (EV_A_ (W *)forks, forkcnt); 3235 array_verify (EV_A_ (W *)forks, forkcnt);
1966#endif 3236#endif
1967 3237
3238#if EV_CLEANUP_ENABLE
3239 assert (cleanupmax >= cleanupcnt);
3240 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3241#endif
3242
1968#if EV_ASYNC_ENABLE 3243#if EV_ASYNC_ENABLE
1969 assert (asyncmax >= asynccnt); 3244 assert (asyncmax >= asynccnt);
1970 array_verify (EV_A_ (W *)asyncs, asynccnt); 3245 array_verify (EV_A_ (W *)asyncs, asynccnt);
1971#endif 3246#endif
1972 3247
… …
1989#endif 3264#endif
1990} 3265}
1991#endif 3266#endif
1992 3267
1993#if EV_MULTIPLICITY 3268#if EV_MULTIPLICITY
3269ecb_cold
1994struct ev_loop * 3270struct ev_loop *
1995ev_default_loop_init (unsigned int flags)
1996#else 3271#else
1997int 3272int
3273#endif
1998ev_default_loop (unsigned int flags) 3274ev_default_loop (unsigned int flags) EV_NOEXCEPT
1999#endif
2000{ 3275{
2001 if (!ev_default_loop_ptr) 3276 if (!ev_default_loop_ptr)
2002 { 3277 {
2003#if EV_MULTIPLICITY 3278#if EV_MULTIPLICITY
2004 EV_P = ev_default_loop_ptr = &default_loop_struct; 3279 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2023 3298
2024 return ev_default_loop_ptr; 3299 return ev_default_loop_ptr;
2025} 3300}
2026 3301
2027void 3302void
2028ev_default_destroy (void) 3303ev_loop_fork (EV_P) EV_NOEXCEPT
2029{ 3304{
2030#if EV_MULTIPLICITY 3305 postfork = 1;
2031 EV_P = ev_default_loop_ptr;
2032#endif
2033
2034 ev_default_loop_ptr = 0;
2035
2036#if EV_CHILD_ENABLE
2037 ev_ref (EV_A); /* child watcher */
2038 ev_signal_stop (EV_A_ &childev);
2039#endif
2040
2041 loop_destroy (EV_A);
2042}
2043
2044void
2045ev_default_fork (void)
2046{
2047#if EV_MULTIPLICITY
2048 EV_P = ev_default_loop_ptr;
2049#endif
2050
2051 postfork = 1; /* must be in line with ev_loop_fork */
2052} 3306}
2053 3307
2054/*****************************************************************************/ 3308/*****************************************************************************/
2055 3309
2056void 3310void
… …
2058{ 3312{
2059 EV_CB_INVOKE ((W)w, revents); 3313 EV_CB_INVOKE ((W)w, revents);
2060} 3314}
2061 3315
2062unsigned int 3316unsigned int
2063ev_pending_count (EV_P) 3317ev_pending_count (EV_P) EV_NOEXCEPT
2064{ 3318{
2065 int pri; 3319 int pri;
2066 unsigned int count = 0; 3320 unsigned int count = 0;
2067 3321
2068 for (pri = NUMPRI; pri--; ) 3322 for (pri = NUMPRI; pri--; )
2069 count += pendingcnt [pri]; 3323 count += pendingcnt [pri];
2070 3324
2071 return count; 3325 return count;
2072} 3326}
2073 3327
2074void noinline 3328noinline
3329void
2075ev_invoke_pending (EV_P) 3330ev_invoke_pending (EV_P)
2076{ 3331{
2077 int pri; 3332 pendingpri = NUMPRI;
2078 3333
2079 for (pri = NUMPRI; pri--; ) 3334 do
3335 {
3336 --pendingpri;
3337
3338 /* pendingpri possibly gets modified in the inner loop */
2080 while (pendingcnt [pri]) 3339 while (pendingcnt [pendingpri])
2081 { 3340 {
2082 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3341 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2083 3342
2084 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2085 /* ^ this is no longer true, as pending_w could be here */
2086
2087 p->w->pending = 0; 3343 p->w->pending = 0;
2088 EV_CB_INVOKE (p->w, p->events); 3344 EV_CB_INVOKE (p->w, p->events);
2089 EV_FREQUENT_CHECK; 3345 EV_FREQUENT_CHECK;
2090 } 3346 }
3347 }
3348 while (pendingpri);
2091} 3349}
2092 3350
2093#if EV_IDLE_ENABLE 3351#if EV_IDLE_ENABLE
2094/* make idle watchers pending. this handles the "call-idle */ 3352/* make idle watchers pending. this handles the "call-idle */
2095/* only when higher priorities are idle" logic */ 3353/* only when higher priorities are idle" logic */
… …
2152 feed_reverse_done (EV_A_ EV_TIMER); 3410 feed_reverse_done (EV_A_ EV_TIMER);
2153 } 3411 }
2154} 3412}
2155 3413
2156#if EV_PERIODIC_ENABLE 3414#if EV_PERIODIC_ENABLE
3415
3416noinline
3417static void
3418periodic_recalc (EV_P_ ev_periodic *w)
3419{
3420 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3421 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3422
3423 /* the above almost always errs on the low side */
3424 while (at <= ev_rt_now)
3425 {
3426 ev_tstamp nat = at + w->interval;
3427
3428 /* when resolution fails us, we use ev_rt_now */
3429 if (expect_false (nat == at))
3430 {
3431 at = ev_rt_now;
3432 break;
3433 }
3434
3435 at = nat;
3436 }
3437
3438 ev_at (w) = at;
3439}
3440
2157/* make periodics pending */ 3441/* make periodics pending */
2158inline_size void 3442inline_size void
2159periodics_reify (EV_P) 3443periodics_reify (EV_P)
2160{ 3444{
2161 EV_FREQUENT_CHECK; 3445 EV_FREQUENT_CHECK;
2162 3446
2163 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3447 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2164 { 3448 {
2165 int feed_count = 0;
2166
2167 do 3449 do
2168 { 3450 {
2169 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3451 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2170 3452
2171 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3453 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2180 ANHE_at_cache (periodics [HEAP0]); 3462 ANHE_at_cache (periodics [HEAP0]);
2181 downheap (periodics, periodiccnt, HEAP0); 3463 downheap (periodics, periodiccnt, HEAP0);
2182 } 3464 }
2183 else if (w->interval) 3465 else if (w->interval)
2184 { 3466 {
2185 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3467 periodic_recalc (EV_A_ w);
2186 /* if next trigger time is not sufficiently in the future, put it there */
2187 /* this might happen because of floating point inexactness */
2188 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2189 {
2190 ev_at (w) += w->interval;
2191
2192 /* if interval is unreasonably low we might still have a time in the past */
2193 /* so correct this. this will make the periodic very inexact, but the user */
2194 /* has effectively asked to get triggered more often than possible */
2195 if (ev_at (w) < ev_rt_now)
2196 ev_at (w) = ev_rt_now;
2197 }
2198
2199 ANHE_at_cache (periodics [HEAP0]); 3468 ANHE_at_cache (periodics [HEAP0]);
2200 downheap (periodics, periodiccnt, HEAP0); 3469 downheap (periodics, periodiccnt, HEAP0);
2201 } 3470 }
2202 else 3471 else
2203 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3472 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2211 } 3480 }
2212} 3481}
2213 3482
2214/* simply recalculate all periodics */ 3483/* simply recalculate all periodics */
2215/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3484/* TODO: maybe ensure that at least one event happens when jumping forward? */
2216static void noinline 3485noinline ecb_cold
3486static void
2217periodics_reschedule (EV_P) 3487periodics_reschedule (EV_P)
2218{ 3488{
2219 int i; 3489 int i;
2220 3490
2221 /* adjust periodics after time jump */ 3491 /* adjust periodics after time jump */
… …
2224 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3494 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2225 3495
2226 if (w->reschedule_cb) 3496 if (w->reschedule_cb)
2227 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3497 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2228 else if (w->interval) 3498 else if (w->interval)
2229 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3499 periodic_recalc (EV_A_ w);
2230 3500
2231 ANHE_at_cache (periodics [i]); 3501 ANHE_at_cache (periodics [i]);
2232 } 3502 }
2233 3503
2234 reheap (periodics, periodiccnt); 3504 reheap (periodics, periodiccnt);
2235} 3505}
2236#endif 3506#endif
2237 3507
2238/* adjust all timers by a given offset */ 3508/* adjust all timers by a given offset */
2239static void noinline 3509noinline ecb_cold
3510static void
2240timers_reschedule (EV_P_ ev_tstamp adjust) 3511timers_reschedule (EV_P_ ev_tstamp adjust)
2241{ 3512{
2242 int i; 3513 int i;
2243 3514
2244 for (i = 0; i < timercnt; ++i) 3515 for (i = 0; i < timercnt; ++i)
… …
2281 * doesn't hurt either as we only do this on time-jumps or 3552 * doesn't hurt either as we only do this on time-jumps or
2282 * in the unlikely event of having been preempted here. 3553 * in the unlikely event of having been preempted here.
2283 */ 3554 */
2284 for (i = 4; --i; ) 3555 for (i = 4; --i; )
2285 { 3556 {
3557 ev_tstamp diff;
2286 rtmn_diff = ev_rt_now - mn_now; 3558 rtmn_diff = ev_rt_now - mn_now;
2287 3559
3560 diff = odiff - rtmn_diff;
3561
2288 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3562 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2289 return; /* all is well */ 3563 return; /* all is well */
2290 3564
2291 ev_rt_now = ev_time (); 3565 ev_rt_now = ev_time ();
2292 mn_now = get_clock (); 3566 mn_now = get_clock ();
2293 now_floor = mn_now; 3567 now_floor = mn_now;
… …
2315 3589
2316 mn_now = ev_rt_now; 3590 mn_now = ev_rt_now;
2317 } 3591 }
2318} 3592}
2319 3593
2320void 3594int
2321ev_run (EV_P_ int flags) 3595ev_run (EV_P_ int flags)
2322{ 3596{
2323#if EV_FEATURE_API 3597#if EV_FEATURE_API
2324 ++loop_depth; 3598 ++loop_depth;
2325#endif 3599#endif
… …
2383 ev_tstamp prev_mn_now = mn_now; 3657 ev_tstamp prev_mn_now = mn_now;
2384 3658
2385 /* update time to cancel out callback processing overhead */ 3659 /* update time to cancel out callback processing overhead */
2386 time_update (EV_A_ 1e100); 3660 time_update (EV_A_ 1e100);
2387 3661
3662 /* from now on, we want a pipe-wake-up */
3663 pipe_write_wanted = 1;
3664
3665 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3666
2388 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3667 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2389 { 3668 {
2390 waittime = MAX_BLOCKTIME; 3669 waittime = MAX_BLOCKTIME;
2391 3670
2392 if (timercnt) 3671 if (timercnt)
2393 { 3672 {
2394 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3673 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2395 if (waittime > to) waittime = to; 3674 if (waittime > to) waittime = to;
2396 } 3675 }
2397 3676
2398#if EV_PERIODIC_ENABLE 3677#if EV_PERIODIC_ENABLE
2399 if (periodiccnt) 3678 if (periodiccnt)
2400 { 3679 {
2401 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3680 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2402 if (waittime > to) waittime = to; 3681 if (waittime > to) waittime = to;
2403 } 3682 }
2404#endif 3683#endif
2405 3684
2406 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3685 /* don't let timeouts decrease the waittime below timeout_blocktime */
2407 if (expect_false (waittime < timeout_blocktime)) 3686 if (expect_false (waittime < timeout_blocktime))
2408 waittime = timeout_blocktime; 3687 waittime = timeout_blocktime;
3688
3689 /* at this point, we NEED to wait, so we have to ensure */
3690 /* to pass a minimum nonzero value to the backend */
3691 if (expect_false (waittime < backend_mintime))
3692 waittime = backend_mintime;
2409 3693
2410 /* extra check because io_blocktime is commonly 0 */ 3694 /* extra check because io_blocktime is commonly 0 */
2411 if (expect_false (io_blocktime)) 3695 if (expect_false (io_blocktime))
2412 { 3696 {
2413 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3697 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2414 3698
2415 if (sleeptime > waittime - backend_fudge) 3699 if (sleeptime > waittime - backend_mintime)
2416 sleeptime = waittime - backend_fudge; 3700 sleeptime = waittime - backend_mintime;
2417 3701
2418 if (expect_true (sleeptime > 0.)) 3702 if (expect_true (sleeptime > 0.))
2419 { 3703 {
2420 ev_sleep (sleeptime); 3704 ev_sleep (sleeptime);
2421 waittime -= sleeptime; 3705 waittime -= sleeptime;
… …
2428#endif 3712#endif
2429 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3713 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2430 backend_poll (EV_A_ waittime); 3714 backend_poll (EV_A_ waittime);
2431 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3715 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2432 3716
3717 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3718
3719 ECB_MEMORY_FENCE_ACQUIRE;
3720 if (pipe_write_skipped)
3721 {
3722 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3723 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3724 }
3725
3726
2433 /* update ev_rt_now, do magic */ 3727 /* update ev_rt_now, do magic */
2434 time_update (EV_A_ waittime + sleeptime); 3728 time_update (EV_A_ waittime + sleeptime);
2435 } 3729 }
2436 3730
2437 /* queue pending timers and reschedule them */ 3731 /* queue pending timers and reschedule them */
… …
2463 loop_done = EVBREAK_CANCEL; 3757 loop_done = EVBREAK_CANCEL;
2464 3758
2465#if EV_FEATURE_API 3759#if EV_FEATURE_API
2466 --loop_depth; 3760 --loop_depth;
2467#endif 3761#endif
2468}
2469 3762
3763 return activecnt;
3764}
3765
2470void 3766void
2471ev_break (EV_P_ int how) 3767ev_break (EV_P_ int how) EV_NOEXCEPT
2472{ 3768{
2473 loop_done = how; 3769 loop_done = how;
2474} 3770}
2475 3771
2476void 3772void
2477ev_ref (EV_P) 3773ev_ref (EV_P) EV_NOEXCEPT
2478{ 3774{
2479 ++activecnt; 3775 ++activecnt;
2480} 3776}
2481 3777
2482void 3778void
2483ev_unref (EV_P) 3779ev_unref (EV_P) EV_NOEXCEPT
2484{ 3780{
2485 --activecnt; 3781 --activecnt;
2486} 3782}
2487 3783
2488void 3784void
2489ev_now_update (EV_P) 3785ev_now_update (EV_P) EV_NOEXCEPT
2490{ 3786{
2491 time_update (EV_A_ 1e100); 3787 time_update (EV_A_ 1e100);
2492} 3788}
2493 3789
2494void 3790void
2495ev_suspend (EV_P) 3791ev_suspend (EV_P) EV_NOEXCEPT
2496{ 3792{
2497 ev_now_update (EV_A); 3793 ev_now_update (EV_A);
2498} 3794}
2499 3795
2500void 3796void
2501ev_resume (EV_P) 3797ev_resume (EV_P) EV_NOEXCEPT
2502{ 3798{
2503 ev_tstamp mn_prev = mn_now; 3799 ev_tstamp mn_prev = mn_now;
2504 3800
2505 ev_now_update (EV_A); 3801 ev_now_update (EV_A);
2506 timers_reschedule (EV_A_ mn_now - mn_prev); 3802 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2545 w->pending = 0; 3841 w->pending = 0;
2546 } 3842 }
2547} 3843}
2548 3844
2549int 3845int
2550ev_clear_pending (EV_P_ void *w) 3846ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2551{ 3847{
2552 W w_ = (W)w; 3848 W w_ = (W)w;
2553 int pending = w_->pending; 3849 int pending = w_->pending;
2554 3850
2555 if (expect_true (pending)) 3851 if (expect_true (pending))
… …
2587 w->active = 0; 3883 w->active = 0;
2588} 3884}
2589 3885
2590/*****************************************************************************/ 3886/*****************************************************************************/
2591 3887
2592void noinline 3888noinline
3889void
2593ev_io_start (EV_P_ ev_io *w) 3890ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2594{ 3891{
2595 int fd = w->fd; 3892 int fd = w->fd;
2596 3893
2597 if (expect_false (ev_is_active (w))) 3894 if (expect_false (ev_is_active (w)))
2598 return; 3895 return;
… …
2601 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3898 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2602 3899
2603 EV_FREQUENT_CHECK; 3900 EV_FREQUENT_CHECK;
2604 3901
2605 ev_start (EV_A_ (W)w, 1); 3902 ev_start (EV_A_ (W)w, 1);
2606 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3903 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2607 wlist_add (&anfds[fd].head, (WL)w); 3904 wlist_add (&anfds[fd].head, (WL)w);
3905
3906 /* common bug, apparently */
3907 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2608 3908
2609 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3909 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2610 w->events &= ~EV__IOFDSET; 3910 w->events &= ~EV__IOFDSET;
2611 3911
2612 EV_FREQUENT_CHECK; 3912 EV_FREQUENT_CHECK;
2613} 3913}
2614 3914
2615void noinline 3915noinline
3916void
2616ev_io_stop (EV_P_ ev_io *w) 3917ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2617{ 3918{
2618 clear_pending (EV_A_ (W)w); 3919 clear_pending (EV_A_ (W)w);
2619 if (expect_false (!ev_is_active (w))) 3920 if (expect_false (!ev_is_active (w)))
2620 return; 3921 return;
2621 3922
… …
2629 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3930 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2630 3931
2631 EV_FREQUENT_CHECK; 3932 EV_FREQUENT_CHECK;
2632} 3933}
2633 3934
2634void noinline 3935noinline
3936void
2635ev_timer_start (EV_P_ ev_timer *w) 3937ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2636{ 3938{
2637 if (expect_false (ev_is_active (w))) 3939 if (expect_false (ev_is_active (w)))
2638 return; 3940 return;
2639 3941
2640 ev_at (w) += mn_now; 3942 ev_at (w) += mn_now;
… …
2643 3945
2644 EV_FREQUENT_CHECK; 3946 EV_FREQUENT_CHECK;
2645 3947
2646 ++timercnt; 3948 ++timercnt;
2647 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3949 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2648 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 3950 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2649 ANHE_w (timers [ev_active (w)]) = (WT)w; 3951 ANHE_w (timers [ev_active (w)]) = (WT)w;
2650 ANHE_at_cache (timers [ev_active (w)]); 3952 ANHE_at_cache (timers [ev_active (w)]);
2651 upheap (timers, ev_active (w)); 3953 upheap (timers, ev_active (w));
2652 3954
2653 EV_FREQUENT_CHECK; 3955 EV_FREQUENT_CHECK;
2654 3956
2655 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3957 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2656} 3958}
2657 3959
2658void noinline 3960noinline
3961void
2659ev_timer_stop (EV_P_ ev_timer *w) 3962ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2660{ 3963{
2661 clear_pending (EV_A_ (W)w); 3964 clear_pending (EV_A_ (W)w);
2662 if (expect_false (!ev_is_active (w))) 3965 if (expect_false (!ev_is_active (w)))
2663 return; 3966 return;
2664 3967
… …
2683 ev_stop (EV_A_ (W)w); 3986 ev_stop (EV_A_ (W)w);
2684 3987
2685 EV_FREQUENT_CHECK; 3988 EV_FREQUENT_CHECK;
2686} 3989}
2687 3990
2688void noinline 3991noinline
3992void
2689ev_timer_again (EV_P_ ev_timer *w) 3993ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2690{ 3994{
2691 EV_FREQUENT_CHECK; 3995 EV_FREQUENT_CHECK;
3996
3997 clear_pending (EV_A_ (W)w);
2692 3998
2693 if (ev_is_active (w)) 3999 if (ev_is_active (w))
2694 { 4000 {
2695 if (w->repeat) 4001 if (w->repeat)
2696 { 4002 {
… …
2709 4015
2710 EV_FREQUENT_CHECK; 4016 EV_FREQUENT_CHECK;
2711} 4017}
2712 4018
2713ev_tstamp 4019ev_tstamp
2714ev_timer_remaining (EV_P_ ev_timer *w) 4020ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2715{ 4021{
2716 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4022 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2717} 4023}
2718 4024
2719#if EV_PERIODIC_ENABLE 4025#if EV_PERIODIC_ENABLE
2720void noinline 4026noinline
4027void
2721ev_periodic_start (EV_P_ ev_periodic *w) 4028ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2722{ 4029{
2723 if (expect_false (ev_is_active (w))) 4030 if (expect_false (ev_is_active (w)))
2724 return; 4031 return;
2725 4032
2726 if (w->reschedule_cb) 4033 if (w->reschedule_cb)
2727 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4034 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2728 else if (w->interval) 4035 else if (w->interval)
2729 { 4036 {
2730 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4037 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2731 /* this formula differs from the one in periodic_reify because we do not always round up */ 4038 periodic_recalc (EV_A_ w);
2732 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2733 } 4039 }
2734 else 4040 else
2735 ev_at (w) = w->offset; 4041 ev_at (w) = w->offset;
2736 4042
2737 EV_FREQUENT_CHECK; 4043 EV_FREQUENT_CHECK;
2738 4044
2739 ++periodiccnt; 4045 ++periodiccnt;
2740 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4046 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2741 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4047 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2742 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4048 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2743 ANHE_at_cache (periodics [ev_active (w)]); 4049 ANHE_at_cache (periodics [ev_active (w)]);
2744 upheap (periodics, ev_active (w)); 4050 upheap (periodics, ev_active (w));
2745 4051
2746 EV_FREQUENT_CHECK; 4052 EV_FREQUENT_CHECK;
2747 4053
2748 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4054 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2749} 4055}
2750 4056
2751void noinline 4057noinline
4058void
2752ev_periodic_stop (EV_P_ ev_periodic *w) 4059ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2753{ 4060{
2754 clear_pending (EV_A_ (W)w); 4061 clear_pending (EV_A_ (W)w);
2755 if (expect_false (!ev_is_active (w))) 4062 if (expect_false (!ev_is_active (w)))
2756 return; 4063 return;
2757 4064
… …
2774 ev_stop (EV_A_ (W)w); 4081 ev_stop (EV_A_ (W)w);
2775 4082
2776 EV_FREQUENT_CHECK; 4083 EV_FREQUENT_CHECK;
2777} 4084}
2778 4085
2779void noinline 4086noinline
4087void
2780ev_periodic_again (EV_P_ ev_periodic *w) 4088ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2781{ 4089{
2782 /* TODO: use adjustheap and recalculation */ 4090 /* TODO: use adjustheap and recalculation */
2783 ev_periodic_stop (EV_A_ w); 4091 ev_periodic_stop (EV_A_ w);
2784 ev_periodic_start (EV_A_ w); 4092 ev_periodic_start (EV_A_ w);
2785} 4093}
… …
2789# define SA_RESTART 0 4097# define SA_RESTART 0
2790#endif 4098#endif
2791 4099
2792#if EV_SIGNAL_ENABLE 4100#if EV_SIGNAL_ENABLE
2793 4101
2794void noinline 4102noinline
4103void
2795ev_signal_start (EV_P_ ev_signal *w) 4104ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2796{ 4105{
2797 if (expect_false (ev_is_active (w))) 4106 if (expect_false (ev_is_active (w)))
2798 return; 4107 return;
2799 4108
2800 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4109 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2802#if EV_MULTIPLICITY 4111#if EV_MULTIPLICITY
2803 assert (("libev: a signal must not be attached to two different loops", 4112 assert (("libev: a signal must not be attached to two different loops",
2804 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4113 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2805 4114
2806 signals [w->signum - 1].loop = EV_A; 4115 signals [w->signum - 1].loop = EV_A;
4116 ECB_MEMORY_FENCE_RELEASE;
2807#endif 4117#endif
2808 4118
2809 EV_FREQUENT_CHECK; 4119 EV_FREQUENT_CHECK;
2810 4120
2811#if EV_USE_SIGNALFD 4121#if EV_USE_SIGNALFD
… …
2858 sa.sa_handler = ev_sighandler; 4168 sa.sa_handler = ev_sighandler;
2859 sigfillset (&sa.sa_mask); 4169 sigfillset (&sa.sa_mask);
2860 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4170 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2861 sigaction (w->signum, &sa, 0); 4171 sigaction (w->signum, &sa, 0);
2862 4172
4173 if (origflags & EVFLAG_NOSIGMASK)
4174 {
2863 sigemptyset (&sa.sa_mask); 4175 sigemptyset (&sa.sa_mask);
2864 sigaddset (&sa.sa_mask, w->signum); 4176 sigaddset (&sa.sa_mask, w->signum);
2865 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4177 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4178 }
2866#endif 4179#endif
2867 } 4180 }
2868 4181
2869 EV_FREQUENT_CHECK; 4182 EV_FREQUENT_CHECK;
2870} 4183}
2871 4184
2872void noinline 4185noinline
4186void
2873ev_signal_stop (EV_P_ ev_signal *w) 4187ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2874{ 4188{
2875 clear_pending (EV_A_ (W)w); 4189 clear_pending (EV_A_ (W)w);
2876 if (expect_false (!ev_is_active (w))) 4190 if (expect_false (!ev_is_active (w)))
2877 return; 4191 return;
2878 4192
… …
2909#endif 4223#endif
2910 4224
2911#if EV_CHILD_ENABLE 4225#if EV_CHILD_ENABLE
2912 4226
2913void 4227void
2914ev_child_start (EV_P_ ev_child *w) 4228ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2915{ 4229{
2916#if EV_MULTIPLICITY 4230#if EV_MULTIPLICITY
2917 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4231 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2918#endif 4232#endif
2919 if (expect_false (ev_is_active (w))) 4233 if (expect_false (ev_is_active (w)))
… …
2926 4240
2927 EV_FREQUENT_CHECK; 4241 EV_FREQUENT_CHECK;
2928} 4242}
2929 4243
2930void 4244void
2931ev_child_stop (EV_P_ ev_child *w) 4245ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2932{ 4246{
2933 clear_pending (EV_A_ (W)w); 4247 clear_pending (EV_A_ (W)w);
2934 if (expect_false (!ev_is_active (w))) 4248 if (expect_false (!ev_is_active (w)))
2935 return; 4249 return;
2936 4250
… …
2953 4267
2954#define DEF_STAT_INTERVAL 5.0074891 4268#define DEF_STAT_INTERVAL 5.0074891
2955#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4269#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2956#define MIN_STAT_INTERVAL 0.1074891 4270#define MIN_STAT_INTERVAL 0.1074891
2957 4271
2958static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4272noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2959 4273
2960#if EV_USE_INOTIFY 4274#if EV_USE_INOTIFY
2961 4275
2962/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4276/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2963# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4277# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2964 4278
2965static void noinline 4279noinline
4280static void
2966infy_add (EV_P_ ev_stat *w) 4281infy_add (EV_P_ ev_stat *w)
2967{ 4282{
2968 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); 4283 w->wd = inotify_add_watch (fs_fd, w->path,
4284 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4285 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4286 | IN_DONT_FOLLOW | IN_MASK_ADD);
2969 4287
2970 if (w->wd >= 0) 4288 if (w->wd >= 0)
2971 { 4289 {
2972 struct statfs sfs; 4290 struct statfs sfs;
2973 4291
… …
2977 4295
2978 if (!fs_2625) 4296 if (!fs_2625)
2979 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4297 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2980 else if (!statfs (w->path, &sfs) 4298 else if (!statfs (w->path, &sfs)
2981 && (sfs.f_type == 0x1373 /* devfs */ 4299 && (sfs.f_type == 0x1373 /* devfs */
4300 || sfs.f_type == 0x4006 /* fat */
4301 || sfs.f_type == 0x4d44 /* msdos */
2982 || sfs.f_type == 0xEF53 /* ext2/3 */ 4302 || sfs.f_type == 0xEF53 /* ext2/3 */
4303 || sfs.f_type == 0x72b6 /* jffs2 */
4304 || sfs.f_type == 0x858458f6 /* ramfs */
4305 || sfs.f_type == 0x5346544e /* ntfs */
2983 || sfs.f_type == 0x3153464a /* jfs */ 4306 || sfs.f_type == 0x3153464a /* jfs */
4307 || sfs.f_type == 0x9123683e /* btrfs */
2984 || sfs.f_type == 0x52654973 /* reiser3 */ 4308 || sfs.f_type == 0x52654973 /* reiser3 */
2985 || sfs.f_type == 0x01021994 /* tempfs */ 4309 || sfs.f_type == 0x01021994 /* tmpfs */
2986 || sfs.f_type == 0x58465342 /* xfs */)) 4310 || sfs.f_type == 0x58465342 /* xfs */))
2987 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4311 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2988 else 4312 else
2989 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4313 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2990 } 4314 }
… …
3011 if (!pend || pend == path) 4335 if (!pend || pend == path)
3012 break; 4336 break;
3013 4337
3014 *pend = 0; 4338 *pend = 0;
3015 w->wd = inotify_add_watch (fs_fd, path, mask); 4339 w->wd = inotify_add_watch (fs_fd, path, mask);
3016 } 4340 }
3017 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4341 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3018 } 4342 }
3019 } 4343 }
3020 4344
3021 if (w->wd >= 0) 4345 if (w->wd >= 0)
… …
3025 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4349 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3026 ev_timer_again (EV_A_ &w->timer); 4350 ev_timer_again (EV_A_ &w->timer);
3027 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4351 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3028} 4352}
3029 4353
3030static void noinline 4354noinline
4355static void
3031infy_del (EV_P_ ev_stat *w) 4356infy_del (EV_P_ ev_stat *w)
3032{ 4357{
3033 int slot; 4358 int slot;
3034 int wd = w->wd; 4359 int wd = w->wd;
3035 4360
… …
3042 4367
3043 /* remove this watcher, if others are watching it, they will rearm */ 4368 /* remove this watcher, if others are watching it, they will rearm */
3044 inotify_rm_watch (fs_fd, wd); 4369 inotify_rm_watch (fs_fd, wd);
3045} 4370}
3046 4371
3047static void noinline 4372noinline
4373static void
3048infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4374infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3049{ 4375{
3050 if (slot < 0) 4376 if (slot < 0)
3051 /* overflow, need to check for all hash slots */ 4377 /* overflow, need to check for all hash slots */
3052 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4378 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3088 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4414 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3089 ofs += sizeof (struct inotify_event) + ev->len; 4415 ofs += sizeof (struct inotify_event) + ev->len;
3090 } 4416 }
3091} 4417}
3092 4418
3093inline_size void 4419inline_size ecb_cold
4420void
3094ev_check_2625 (EV_P) 4421ev_check_2625 (EV_P)
3095{ 4422{
3096 /* kernels < 2.6.25 are borked 4423 /* kernels < 2.6.25 are borked
3097 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4424 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3098 */ 4425 */
… …
3103} 4430}
3104 4431
3105inline_size int 4432inline_size int
3106infy_newfd (void) 4433infy_newfd (void)
3107{ 4434{
3108#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4435#if defined IN_CLOEXEC && defined IN_NONBLOCK
3109 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4436 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3110 if (fd >= 0) 4437 if (fd >= 0)
3111 return fd; 4438 return fd;
3112#endif 4439#endif
3113 return inotify_init (); 4440 return inotify_init ();
… …
3188#else 4515#else
3189# define EV_LSTAT(p,b) lstat (p, b) 4516# define EV_LSTAT(p,b) lstat (p, b)
3190#endif 4517#endif
3191 4518
3192void 4519void
3193ev_stat_stat (EV_P_ ev_stat *w) 4520ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3194{ 4521{
3195 if (lstat (w->path, &w->attr) < 0) 4522 if (lstat (w->path, &w->attr) < 0)
3196 w->attr.st_nlink = 0; 4523 w->attr.st_nlink = 0;
3197 else if (!w->attr.st_nlink) 4524 else if (!w->attr.st_nlink)
3198 w->attr.st_nlink = 1; 4525 w->attr.st_nlink = 1;
3199} 4526}
3200 4527
3201static void noinline 4528noinline
4529static void
3202stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4530stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3203{ 4531{
3204 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4532 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3205 4533
3206 ev_statdata prev = w->attr; 4534 ev_statdata prev = w->attr;
… …
3237 ev_feed_event (EV_A_ w, EV_STAT); 4565 ev_feed_event (EV_A_ w, EV_STAT);
3238 } 4566 }
3239} 4567}
3240 4568
3241void 4569void
3242ev_stat_start (EV_P_ ev_stat *w) 4570ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3243{ 4571{
3244 if (expect_false (ev_is_active (w))) 4572 if (expect_false (ev_is_active (w)))
3245 return; 4573 return;
3246 4574
3247 ev_stat_stat (EV_A_ w); 4575 ev_stat_stat (EV_A_ w);
… …
3268 4596
3269 EV_FREQUENT_CHECK; 4597 EV_FREQUENT_CHECK;
3270} 4598}
3271 4599
3272void 4600void
3273ev_stat_stop (EV_P_ ev_stat *w) 4601ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3274{ 4602{
3275 clear_pending (EV_A_ (W)w); 4603 clear_pending (EV_A_ (W)w);
3276 if (expect_false (!ev_is_active (w))) 4604 if (expect_false (!ev_is_active (w)))
3277 return; 4605 return;
3278 4606
… …
3294} 4622}
3295#endif 4623#endif
3296 4624
3297#if EV_IDLE_ENABLE 4625#if EV_IDLE_ENABLE
3298void 4626void
3299ev_idle_start (EV_P_ ev_idle *w) 4627ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3300{ 4628{
3301 if (expect_false (ev_is_active (w))) 4629 if (expect_false (ev_is_active (w)))
3302 return; 4630 return;
3303 4631
3304 pri_adjust (EV_A_ (W)w); 4632 pri_adjust (EV_A_ (W)w);
… …
3309 int active = ++idlecnt [ABSPRI (w)]; 4637 int active = ++idlecnt [ABSPRI (w)];
3310 4638
3311 ++idleall; 4639 ++idleall;
3312 ev_start (EV_A_ (W)w, active); 4640 ev_start (EV_A_ (W)w, active);
3313 4641
3314 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4642 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3315 idles [ABSPRI (w)][active - 1] = w; 4643 idles [ABSPRI (w)][active - 1] = w;
3316 } 4644 }
3317 4645
3318 EV_FREQUENT_CHECK; 4646 EV_FREQUENT_CHECK;
3319} 4647}
3320 4648
3321void 4649void
3322ev_idle_stop (EV_P_ ev_idle *w) 4650ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3323{ 4651{
3324 clear_pending (EV_A_ (W)w); 4652 clear_pending (EV_A_ (W)w);
3325 if (expect_false (!ev_is_active (w))) 4653 if (expect_false (!ev_is_active (w)))
3326 return; 4654 return;
3327 4655
… …
3341} 4669}
3342#endif 4670#endif
3343 4671
3344#if EV_PREPARE_ENABLE 4672#if EV_PREPARE_ENABLE
3345void 4673void
3346ev_prepare_start (EV_P_ ev_prepare *w) 4674ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3347{ 4675{
3348 if (expect_false (ev_is_active (w))) 4676 if (expect_false (ev_is_active (w)))
3349 return; 4677 return;
3350 4678
3351 EV_FREQUENT_CHECK; 4679 EV_FREQUENT_CHECK;
3352 4680
3353 ev_start (EV_A_ (W)w, ++preparecnt); 4681 ev_start (EV_A_ (W)w, ++preparecnt);
3354 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4682 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3355 prepares [preparecnt - 1] = w; 4683 prepares [preparecnt - 1] = w;
3356 4684
3357 EV_FREQUENT_CHECK; 4685 EV_FREQUENT_CHECK;
3358} 4686}
3359 4687
3360void 4688void
3361ev_prepare_stop (EV_P_ ev_prepare *w) 4689ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3362{ 4690{
3363 clear_pending (EV_A_ (W)w); 4691 clear_pending (EV_A_ (W)w);
3364 if (expect_false (!ev_is_active (w))) 4692 if (expect_false (!ev_is_active (w)))
3365 return; 4693 return;
3366 4694
… …
3379} 4707}
3380#endif 4708#endif
3381 4709
3382#if EV_CHECK_ENABLE 4710#if EV_CHECK_ENABLE
3383void 4711void
3384ev_check_start (EV_P_ ev_check *w) 4712ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3385{ 4713{
3386 if (expect_false (ev_is_active (w))) 4714 if (expect_false (ev_is_active (w)))
3387 return; 4715 return;
3388 4716
3389 EV_FREQUENT_CHECK; 4717 EV_FREQUENT_CHECK;
3390 4718
3391 ev_start (EV_A_ (W)w, ++checkcnt); 4719 ev_start (EV_A_ (W)w, ++checkcnt);
3392 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4720 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3393 checks [checkcnt - 1] = w; 4721 checks [checkcnt - 1] = w;
3394 4722
3395 EV_FREQUENT_CHECK; 4723 EV_FREQUENT_CHECK;
3396} 4724}
3397 4725
3398void 4726void
3399ev_check_stop (EV_P_ ev_check *w) 4727ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3400{ 4728{
3401 clear_pending (EV_A_ (W)w); 4729 clear_pending (EV_A_ (W)w);
3402 if (expect_false (!ev_is_active (w))) 4730 if (expect_false (!ev_is_active (w)))
3403 return; 4731 return;
3404 4732
… …
3416 EV_FREQUENT_CHECK; 4744 EV_FREQUENT_CHECK;
3417} 4745}
3418#endif 4746#endif
3419 4747
3420#if EV_EMBED_ENABLE 4748#if EV_EMBED_ENABLE
3421void noinline 4749noinline
4750void
3422ev_embed_sweep (EV_P_ ev_embed *w) 4751ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3423{ 4752{
3424 ev_run (w->other, EVRUN_NOWAIT); 4753 ev_run (w->other, EVRUN_NOWAIT);
3425} 4754}
3426 4755
3427static void 4756static void
… …
3475 ev_idle_stop (EV_A_ idle); 4804 ev_idle_stop (EV_A_ idle);
3476} 4805}
3477#endif 4806#endif
3478 4807
3479void 4808void
3480ev_embed_start (EV_P_ ev_embed *w) 4809ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3481{ 4810{
3482 if (expect_false (ev_is_active (w))) 4811 if (expect_false (ev_is_active (w)))
3483 return; 4812 return;
3484 4813
3485 { 4814 {
… …
3506 4835
3507 EV_FREQUENT_CHECK; 4836 EV_FREQUENT_CHECK;
3508} 4837}
3509 4838
3510void 4839void
3511ev_embed_stop (EV_P_ ev_embed *w) 4840ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3512{ 4841{
3513 clear_pending (EV_A_ (W)w); 4842 clear_pending (EV_A_ (W)w);
3514 if (expect_false (!ev_is_active (w))) 4843 if (expect_false (!ev_is_active (w)))
3515 return; 4844 return;
3516 4845
… …
3526} 4855}
3527#endif 4856#endif
3528 4857
3529#if EV_FORK_ENABLE 4858#if EV_FORK_ENABLE
3530void 4859void
3531ev_fork_start (EV_P_ ev_fork *w) 4860ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3532{ 4861{
3533 if (expect_false (ev_is_active (w))) 4862 if (expect_false (ev_is_active (w)))
3534 return; 4863 return;
3535 4864
3536 EV_FREQUENT_CHECK; 4865 EV_FREQUENT_CHECK;
3537 4866
3538 ev_start (EV_A_ (W)w, ++forkcnt); 4867 ev_start (EV_A_ (W)w, ++forkcnt);
3539 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4868 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3540 forks [forkcnt - 1] = w; 4869 forks [forkcnt - 1] = w;
3541 4870
3542 EV_FREQUENT_CHECK; 4871 EV_FREQUENT_CHECK;
3543} 4872}
3544 4873
3545void 4874void
3546ev_fork_stop (EV_P_ ev_fork *w) 4875ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3547{ 4876{
3548 clear_pending (EV_A_ (W)w); 4877 clear_pending (EV_A_ (W)w);
3549 if (expect_false (!ev_is_active (w))) 4878 if (expect_false (!ev_is_active (w)))
3550 return; 4879 return;
3551 4880
… …
3562 4891
3563 EV_FREQUENT_CHECK; 4892 EV_FREQUENT_CHECK;
3564} 4893}
3565#endif 4894#endif
3566 4895
3567#if EV_ASYNC_ENABLE 4896#if EV_CLEANUP_ENABLE
3568void 4897void
3569ev_async_start (EV_P_ ev_async *w) 4898ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3570{ 4899{
3571 if (expect_false (ev_is_active (w))) 4900 if (expect_false (ev_is_active (w)))
3572 return; 4901 return;
3573 4902
3574 w->sent = 0;
3575
3576 evpipe_init (EV_A);
3577
3578 EV_FREQUENT_CHECK; 4903 EV_FREQUENT_CHECK;
3579 4904
3580 ev_start (EV_A_ (W)w, ++asynccnt); 4905 ev_start (EV_A_ (W)w, ++cleanupcnt);
3581 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4906 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3582 asyncs [asynccnt - 1] = w; 4907 cleanups [cleanupcnt - 1] = w;
3583 4908
4909 /* cleanup watchers should never keep a refcount on the loop */
4910 ev_unref (EV_A);
3584 EV_FREQUENT_CHECK; 4911 EV_FREQUENT_CHECK;
3585} 4912}
3586 4913
3587void 4914void
3588ev_async_stop (EV_P_ ev_async *w) 4915ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3589{ 4916{
3590 clear_pending (EV_A_ (W)w); 4917 clear_pending (EV_A_ (W)w);
3591 if (expect_false (!ev_is_active (w))) 4918 if (expect_false (!ev_is_active (w)))
3592 return; 4919 return;
3593 4920
3594 EV_FREQUENT_CHECK; 4921 EV_FREQUENT_CHECK;
4922 ev_ref (EV_A);
4923
4924 {
4925 int active = ev_active (w);
4926
4927 cleanups [active - 1] = cleanups [--cleanupcnt];
4928 ev_active (cleanups [active - 1]) = active;
4929 }
4930
4931 ev_stop (EV_A_ (W)w);
4932
4933 EV_FREQUENT_CHECK;
4934}
4935#endif
4936
4937#if EV_ASYNC_ENABLE
4938void
4939ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4940{
4941 if (expect_false (ev_is_active (w)))
4942 return;
4943
4944 w->sent = 0;
4945
4946 evpipe_init (EV_A);
4947
4948 EV_FREQUENT_CHECK;
4949
4950 ev_start (EV_A_ (W)w, ++asynccnt);
4951 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4952 asyncs [asynccnt - 1] = w;
4953
4954 EV_FREQUENT_CHECK;
4955}
4956
4957void
4958ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4959{
4960 clear_pending (EV_A_ (W)w);
4961 if (expect_false (!ev_is_active (w)))
4962 return;
4963
4964 EV_FREQUENT_CHECK;
3595 4965
3596 { 4966 {
3597 int active = ev_active (w); 4967 int active = ev_active (w);
3598 4968
3599 asyncs [active - 1] = asyncs [--asynccnt]; 4969 asyncs [active - 1] = asyncs [--asynccnt];
… …
3604 4974
3605 EV_FREQUENT_CHECK; 4975 EV_FREQUENT_CHECK;
3606} 4976}
3607 4977
3608void 4978void
3609ev_async_send (EV_P_ ev_async *w) 4979ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3610{ 4980{
3611 w->sent = 1; 4981 w->sent = 1;
3612 evpipe_write (EV_A_ &async_pending); 4982 evpipe_write (EV_A_ &async_pending);
3613} 4983}
3614#endif 4984#endif
… …
3651 5021
3652 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5022 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3653} 5023}
3654 5024
3655void 5025void
3656ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5026ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3657{ 5027{
3658 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5028 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3659
3660 if (expect_false (!once))
3661 {
3662 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3663 return;
3664 }
3665 5029
3666 once->cb = cb; 5030 once->cb = cb;
3667 once->arg = arg; 5031 once->arg = arg;
3668 5032
3669 ev_init (&once->io, once_cb_io); 5033 ev_init (&once->io, once_cb_io);
… …
3682} 5046}
3683 5047
3684/*****************************************************************************/ 5048/*****************************************************************************/
3685 5049
3686#if EV_WALK_ENABLE 5050#if EV_WALK_ENABLE
5051ecb_cold
3687void 5052void
3688ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5053ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3689{ 5054{
3690 int i, j; 5055 int i, j;
3691 ev_watcher_list *wl, *wn; 5056 ev_watcher_list *wl, *wn;
3692 5057
3693 if (types & (EV_IO | EV_EMBED)) 5058 if (types & (EV_IO | EV_EMBED))
… …
3736 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5101 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3737#endif 5102#endif
3738 5103
3739#if EV_IDLE_ENABLE 5104#if EV_IDLE_ENABLE
3740 if (types & EV_IDLE) 5105 if (types & EV_IDLE)
3741 for (j = NUMPRI; i--; ) 5106 for (j = NUMPRI; j--; )
3742 for (i = idlecnt [j]; i--; ) 5107 for (i = idlecnt [j]; i--; )
3743 cb (EV_A_ EV_IDLE, idles [j][i]); 5108 cb (EV_A_ EV_IDLE, idles [j][i]);
3744#endif 5109#endif
3745 5110
3746#if EV_FORK_ENABLE 5111#if EV_FORK_ENABLE
… …
3799 5164
3800#if EV_MULTIPLICITY 5165#if EV_MULTIPLICITY
3801 #include "ev_wrap.h" 5166 #include "ev_wrap.h"
3802#endif 5167#endif
3803 5168
3804EV_CPP(})
3805

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines