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Comparing libev/ev.c (file contents):
Revision 1.371 by root, Mon Feb 7 21:45:32 2011 UTC vs.
Revision 1.488 by root, Fri Dec 21 06:57:09 2018 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2018 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
… …
338 365
339#ifndef EV_HEAP_CACHE_AT 366#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 367# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 368#endif
342 369
370#ifdef __ANDROID__
371/* supposedly, android doesn't typedef fd_mask */
372# undef EV_USE_SELECT
373# define EV_USE_SELECT 0
374/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
375# undef EV_USE_CLOCK_SYSCALL
376# define EV_USE_CLOCK_SYSCALL 0
377#endif
378
379/* aix's poll.h seems to cause lots of trouble */
380#ifdef _AIX
381/* AIX has a completely broken poll.h header */
382# undef EV_USE_POLL
383# define EV_USE_POLL 0
384#endif
385
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 386/* 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. */ 387/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 388#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 389# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 390# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 391# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 392# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 393# define EV_USE_MONOTONIC 1
351# else 394# else
… …
354# endif 397# endif
355#endif 398#endif
356 399
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 400/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 401
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 402#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 403# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 404# define EV_USE_MONOTONIC 0
368#endif 405#endif
369 406
… …
377# define EV_USE_INOTIFY 0 414# define EV_USE_INOTIFY 0
378#endif 415#endif
379 416
380#if !EV_USE_NANOSLEEP 417#if !EV_USE_NANOSLEEP
381/* hp-ux has it in sys/time.h, which we unconditionally include above */ 418/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux) 419# if !defined _WIN32 && !defined __hpux
383# include <sys/select.h> 420# include <sys/select.h>
384# endif 421# endif
385#endif 422#endif
386 423
387#if EV_USE_INOTIFY 424#if EV_USE_INOTIFY
… …
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 427/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 428# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 429# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 430# define EV_USE_INOTIFY 0
394# endif 431# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 432#endif
400 433
401#if EV_USE_EVENTFD 434#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 435/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 436# include <stdint.h>
… …
443#else 476#else
444# define EV_FREQUENT_CHECK do { } while (0) 477# define EV_FREQUENT_CHECK do { } while (0)
445#endif 478#endif
446 479
447/* 480/*
448 * This is used to avoid floating point rounding problems. 481 * 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. 482 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 483 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 484#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
485/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 486
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 487#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) */ 488#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 489
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 490#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) 491#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 492
493/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
494/* ECB.H BEGIN */
495/*
496 * libecb - http://software.schmorp.de/pkg/libecb
497 *
498 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
499 * Copyright (©) 2011 Emanuele Giaquinta
500 * All rights reserved.
501 *
502 * Redistribution and use in source and binary forms, with or without modifica-
503 * tion, are permitted provided that the following conditions are met:
504 *
505 * 1. Redistributions of source code must retain the above copyright notice,
506 * this list of conditions and the following disclaimer.
507 *
508 * 2. Redistributions in binary form must reproduce the above copyright
509 * notice, this list of conditions and the following disclaimer in the
510 * documentation and/or other materials provided with the distribution.
511 *
512 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
513 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
514 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
515 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
516 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
517 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
518 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
519 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
520 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
521 * OF THE POSSIBILITY OF SUCH DAMAGE.
522 *
523 * Alternatively, the contents of this file may be used under the terms of
524 * the GNU General Public License ("GPL") version 2 or any later version,
525 * in which case the provisions of the GPL are applicable instead of
526 * the above. If you wish to allow the use of your version of this file
527 * only under the terms of the GPL and not to allow others to use your
528 * version of this file under the BSD license, indicate your decision
529 * by deleting the provisions above and replace them with the notice
530 * and other provisions required by the GPL. If you do not delete the
531 * provisions above, a recipient may use your version of this file under
532 * either the BSD or the GPL.
533 */
534
535#ifndef ECB_H
536#define ECB_H
537
538/* 16 bits major, 16 bits minor */
539#define ECB_VERSION 0x00010005
540
541#ifdef _WIN32
542 typedef signed char int8_t;
543 typedef unsigned char uint8_t;
544 typedef signed short int16_t;
545 typedef unsigned short uint16_t;
546 typedef signed int int32_t;
547 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 548 #if __GNUC__
549 typedef signed long long int64_t;
550 typedef unsigned long long uint64_t;
551 #else /* _MSC_VER || __BORLANDC__ */
552 typedef signed __int64 int64_t;
553 typedef unsigned __int64 uint64_t;
554 #endif
555 #ifdef _WIN64
556 #define ECB_PTRSIZE 8
557 typedef uint64_t uintptr_t;
558 typedef int64_t intptr_t;
559 #else
560 #define ECB_PTRSIZE 4
561 typedef uint32_t uintptr_t;
562 typedef int32_t intptr_t;
563 #endif
564#else
565 #include <inttypes.h>
566 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
567 #define ECB_PTRSIZE 8
568 #else
569 #define ECB_PTRSIZE 4
570 #endif
571#endif
572
573#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
574#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
575
576/* work around x32 idiocy by defining proper macros */
577#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
578 #if _ILP32
579 #define ECB_AMD64_X32 1
580 #else
581 #define ECB_AMD64 1
582 #endif
583#endif
584
585/* many compilers define _GNUC_ to some versions but then only implement
586 * what their idiot authors think are the "more important" extensions,
587 * causing enormous grief in return for some better fake benchmark numbers.
588 * or so.
589 * we try to detect these and simply assume they are not gcc - if they have
590 * an issue with that they should have done it right in the first place.
591 */
592#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
593 #define ECB_GCC_VERSION(major,minor) 0
594#else
595 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
596#endif
597
598#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
599
600#if __clang__ && defined __has_builtin
601 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
602#else
603 #define ECB_CLANG_BUILTIN(x) 0
604#endif
605
606#if __clang__ && defined __has_extension
607 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
608#else
609 #define ECB_CLANG_EXTENSION(x) 0
610#endif
611
612#define ECB_CPP (__cplusplus+0)
613#define ECB_CPP11 (__cplusplus >= 201103L)
614#define ECB_CPP14 (__cplusplus >= 201402L)
615#define ECB_CPP17 (__cplusplus >= 201703L)
616
617#if ECB_CPP
618 #define ECB_C 0
619 #define ECB_STDC_VERSION 0
620#else
621 #define ECB_C 1
622 #define ECB_STDC_VERSION __STDC_VERSION__
623#endif
624
625#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
626#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
627#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
628
629#if ECB_CPP
630 #define ECB_EXTERN_C extern "C"
631 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
632 #define ECB_EXTERN_C_END }
633#else
634 #define ECB_EXTERN_C extern
635 #define ECB_EXTERN_C_BEG
636 #define ECB_EXTERN_C_END
637#endif
638
639/*****************************************************************************/
640
641/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
642/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
643
644#if ECB_NO_THREADS
645 #define ECB_NO_SMP 1
646#endif
647
648#if ECB_NO_SMP
649 #define ECB_MEMORY_FENCE do { } while (0)
650#endif
651
652/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
653#if __xlC__ && ECB_CPP
654 #include <builtins.h>
655#endif
656
657#if 1400 <= _MSC_VER
658 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
659#endif
660
661#ifndef ECB_MEMORY_FENCE
662 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
663 #if __i386 || __i386__
664 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
665 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
666 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
667 #elif ECB_GCC_AMD64
668 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
669 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
670 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
671 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
672 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
673 #elif defined __ARM_ARCH_2__ \
674 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
675 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
676 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
677 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
678 || defined __ARM_ARCH_5TEJ__
679 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
680 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
681 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
682 || defined __ARM_ARCH_6T2__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
684 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
685 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
686 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
687 #elif __aarch64__
688 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
689 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
691 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
692 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
693 #elif defined __s390__ || defined __s390x__
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
695 #elif defined __mips__
696 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
697 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
698 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
699 #elif defined __alpha__
700 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
701 #elif defined __hppa__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
703 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
704 #elif defined __ia64__
705 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
706 #elif defined __m68k__
707 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
708 #elif defined __m88k__
709 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
710 #elif defined __sh__
711 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
712 #endif
713 #endif
714#endif
715
716#ifndef ECB_MEMORY_FENCE
717 #if ECB_GCC_VERSION(4,7)
718 /* see comment below (stdatomic.h) about the C11 memory model. */
719 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
720 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
721 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
722
723 #elif ECB_CLANG_EXTENSION(c_atomic)
724 /* see comment below (stdatomic.h) about the C11 memory model. */
725 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
726 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
727 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
728
729 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
730 #define ECB_MEMORY_FENCE __sync_synchronize ()
731 #elif _MSC_VER >= 1500 /* VC++ 2008 */
732 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
733 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
734 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
735 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
736 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
737 #elif _MSC_VER >= 1400 /* VC++ 2005 */
738 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
739 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
740 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
741 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
742 #elif defined _WIN32
743 #include <WinNT.h>
744 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
745 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
746 #include <mbarrier.h>
747 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
748 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
749 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
750 #elif __xlC__
751 #define ECB_MEMORY_FENCE __sync ()
752 #endif
753#endif
754
755#ifndef ECB_MEMORY_FENCE
756 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
757 /* we assume that these memory fences work on all variables/all memory accesses, */
758 /* not just C11 atomics and atomic accesses */
759 #include <stdatomic.h>
760 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
761 /* any fence other than seq_cst, which isn't very efficient for us. */
762 /* Why that is, we don't know - either the C11 memory model is quite useless */
763 /* for most usages, or gcc and clang have a bug */
764 /* I *currently* lean towards the latter, and inefficiently implement */
765 /* all three of ecb's fences as a seq_cst fence */
766 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
767 /* for all __atomic_thread_fence's except seq_cst */
768 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
769 #endif
770#endif
771
772#ifndef ECB_MEMORY_FENCE
773 #if !ECB_AVOID_PTHREADS
774 /*
775 * if you get undefined symbol references to pthread_mutex_lock,
776 * or failure to find pthread.h, then you should implement
777 * the ECB_MEMORY_FENCE operations for your cpu/compiler
778 * OR provide pthread.h and link against the posix thread library
779 * of your system.
780 */
781 #include <pthread.h>
782 #define ECB_NEEDS_PTHREADS 1
783 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
784
785 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
786 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
787 #endif
788#endif
789
790#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
791 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
792#endif
793
794#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
795 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
796#endif
797
798/*****************************************************************************/
799
800#if ECB_CPP
801 #define ecb_inline static inline
802#elif ECB_GCC_VERSION(2,5)
803 #define ecb_inline static __inline__
804#elif ECB_C99
805 #define ecb_inline static inline
806#else
807 #define ecb_inline static
808#endif
809
810#if ECB_GCC_VERSION(3,3)
811 #define ecb_restrict __restrict__
812#elif ECB_C99
813 #define ecb_restrict restrict
814#else
815 #define ecb_restrict
816#endif
817
818typedef int ecb_bool;
819
820#define ECB_CONCAT_(a, b) a ## b
821#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
822#define ECB_STRINGIFY_(a) # a
823#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
824#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
825
826#define ecb_function_ ecb_inline
827
828#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
829 #define ecb_attribute(attrlist) __attribute__ (attrlist)
830#else
831 #define ecb_attribute(attrlist)
832#endif
833
834#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
835 #define ecb_is_constant(expr) __builtin_constant_p (expr)
836#else
837 /* possible C11 impl for integral types
838 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
839 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
840
841 #define ecb_is_constant(expr) 0
842#endif
843
844#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
464# define expect(expr,value) __builtin_expect ((expr),(value)) 845 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
465# define noinline __attribute__ ((noinline))
466#else 846#else
467# define expect(expr,value) (expr) 847 #define ecb_expect(expr,value) (expr)
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif 848#endif
472#endif
473 849
850#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
851 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
852#else
853 #define ecb_prefetch(addr,rw,locality)
854#endif
855
856/* no emulation for ecb_decltype */
857#if ECB_CPP11
858 // older implementations might have problems with decltype(x)::type, work around it
859 template<class T> struct ecb_decltype_t { typedef T type; };
860 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
861#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
862 #define ecb_decltype(x) __typeof__ (x)
863#endif
864
865#if _MSC_VER >= 1300
866 #define ecb_deprecated __declspec (deprecated)
867#else
868 #define ecb_deprecated ecb_attribute ((__deprecated__))
869#endif
870
871#if _MSC_VER >= 1500
872 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
873#elif ECB_GCC_VERSION(4,5)
874 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
875#else
876 #define ecb_deprecated_message(msg) ecb_deprecated
877#endif
878
879#if _MSC_VER >= 1400
880 #define ecb_noinline __declspec (noinline)
881#else
882 #define ecb_noinline ecb_attribute ((__noinline__))
883#endif
884
885#define ecb_unused ecb_attribute ((__unused__))
886#define ecb_const ecb_attribute ((__const__))
887#define ecb_pure ecb_attribute ((__pure__))
888
889#if ECB_C11 || __IBMC_NORETURN
890 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
891 #define ecb_noreturn _Noreturn
892#elif ECB_CPP11
893 #define ecb_noreturn [[noreturn]]
894#elif _MSC_VER >= 1200
895 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
896 #define ecb_noreturn __declspec (noreturn)
897#else
898 #define ecb_noreturn ecb_attribute ((__noreturn__))
899#endif
900
901#if ECB_GCC_VERSION(4,3)
902 #define ecb_artificial ecb_attribute ((__artificial__))
903 #define ecb_hot ecb_attribute ((__hot__))
904 #define ecb_cold ecb_attribute ((__cold__))
905#else
906 #define ecb_artificial
907 #define ecb_hot
908 #define ecb_cold
909#endif
910
911/* put around conditional expressions if you are very sure that the */
912/* expression is mostly true or mostly false. note that these return */
913/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 914#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 915#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
916/* for compatibility to the rest of the world */
917#define ecb_likely(expr) ecb_expect_true (expr)
918#define ecb_unlikely(expr) ecb_expect_false (expr)
919
920/* count trailing zero bits and count # of one bits */
921#if ECB_GCC_VERSION(3,4) \
922 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
923 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
924 && ECB_CLANG_BUILTIN(__builtin_popcount))
925 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
926 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
927 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
928 #define ecb_ctz32(x) __builtin_ctz (x)
929 #define ecb_ctz64(x) __builtin_ctzll (x)
930 #define ecb_popcount32(x) __builtin_popcount (x)
931 /* no popcountll */
932#else
933 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
934 ecb_function_ ecb_const int
935 ecb_ctz32 (uint32_t x)
936 {
937#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
938 unsigned long r;
939 _BitScanForward (&r, x);
940 return (int)r;
941#else
942 int r = 0;
943
944 x &= ~x + 1; /* this isolates the lowest bit */
945
946#if ECB_branchless_on_i386
947 r += !!(x & 0xaaaaaaaa) << 0;
948 r += !!(x & 0xcccccccc) << 1;
949 r += !!(x & 0xf0f0f0f0) << 2;
950 r += !!(x & 0xff00ff00) << 3;
951 r += !!(x & 0xffff0000) << 4;
952#else
953 if (x & 0xaaaaaaaa) r += 1;
954 if (x & 0xcccccccc) r += 2;
955 if (x & 0xf0f0f0f0) r += 4;
956 if (x & 0xff00ff00) r += 8;
957 if (x & 0xffff0000) r += 16;
958#endif
959
960 return r;
961#endif
962 }
963
964 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
965 ecb_function_ ecb_const int
966 ecb_ctz64 (uint64_t x)
967 {
968#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
969 unsigned long r;
970 _BitScanForward64 (&r, x);
971 return (int)r;
972#else
973 int shift = x & 0xffffffff ? 0 : 32;
974 return ecb_ctz32 (x >> shift) + shift;
975#endif
976 }
977
978 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
979 ecb_function_ ecb_const int
980 ecb_popcount32 (uint32_t x)
981 {
982 x -= (x >> 1) & 0x55555555;
983 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
984 x = ((x >> 4) + x) & 0x0f0f0f0f;
985 x *= 0x01010101;
986
987 return x >> 24;
988 }
989
990 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
991 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
992 {
993#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
994 unsigned long r;
995 _BitScanReverse (&r, x);
996 return (int)r;
997#else
998 int r = 0;
999
1000 if (x >> 16) { x >>= 16; r += 16; }
1001 if (x >> 8) { x >>= 8; r += 8; }
1002 if (x >> 4) { x >>= 4; r += 4; }
1003 if (x >> 2) { x >>= 2; r += 2; }
1004 if (x >> 1) { r += 1; }
1005
1006 return r;
1007#endif
1008 }
1009
1010 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1011 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1012 {
1013#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1014 unsigned long r;
1015 _BitScanReverse64 (&r, x);
1016 return (int)r;
1017#else
1018 int r = 0;
1019
1020 if (x >> 32) { x >>= 32; r += 32; }
1021
1022 return r + ecb_ld32 (x);
1023#endif
1024 }
1025#endif
1026
1027ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1028ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1029ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1030ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1031
1032ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1033ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1034{
1035 return ( (x * 0x0802U & 0x22110U)
1036 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1037}
1038
1039ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1040ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1041{
1042 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1043 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1044 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1045 x = ( x >> 8 ) | ( x << 8);
1046
1047 return x;
1048}
1049
1050ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1051ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1052{
1053 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1054 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1055 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1056 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1057 x = ( x >> 16 ) | ( x << 16);
1058
1059 return x;
1060}
1061
1062/* popcount64 is only available on 64 bit cpus as gcc builtin */
1063/* so for this version we are lazy */
1064ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1065ecb_function_ ecb_const int
1066ecb_popcount64 (uint64_t x)
1067{
1068 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1069}
1070
1071ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1072ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1073ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1074ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1075ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1076ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1077ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1078ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1079
1080ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1081ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1082ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1083ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1084ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1085ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1086ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1087ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1088
1089#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1090 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1091 #define ecb_bswap16(x) __builtin_bswap16 (x)
1092 #else
1093 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1094 #endif
1095 #define ecb_bswap32(x) __builtin_bswap32 (x)
1096 #define ecb_bswap64(x) __builtin_bswap64 (x)
1097#elif _MSC_VER
1098 #include <stdlib.h>
1099 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1100 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1101 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1102#else
1103 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1104 ecb_function_ ecb_const uint16_t
1105 ecb_bswap16 (uint16_t x)
1106 {
1107 return ecb_rotl16 (x, 8);
1108 }
1109
1110 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1111 ecb_function_ ecb_const uint32_t
1112 ecb_bswap32 (uint32_t x)
1113 {
1114 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1115 }
1116
1117 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1118 ecb_function_ ecb_const uint64_t
1119 ecb_bswap64 (uint64_t x)
1120 {
1121 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1122 }
1123#endif
1124
1125#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1126 #define ecb_unreachable() __builtin_unreachable ()
1127#else
1128 /* this seems to work fine, but gcc always emits a warning for it :/ */
1129 ecb_inline ecb_noreturn void ecb_unreachable (void);
1130 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1131#endif
1132
1133/* try to tell the compiler that some condition is definitely true */
1134#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1135
1136ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1137ecb_inline ecb_const uint32_t
1138ecb_byteorder_helper (void)
1139{
1140 /* the union code still generates code under pressure in gcc, */
1141 /* but less than using pointers, and always seems to */
1142 /* successfully return a constant. */
1143 /* the reason why we have this horrible preprocessor mess */
1144 /* is to avoid it in all cases, at least on common architectures */
1145 /* or when using a recent enough gcc version (>= 4.6) */
1146#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1147 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1148 #define ECB_LITTLE_ENDIAN 1
1149 return 0x44332211;
1150#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1151 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1152 #define ECB_BIG_ENDIAN 1
1153 return 0x11223344;
1154#else
1155 union
1156 {
1157 uint8_t c[4];
1158 uint32_t u;
1159 } u = { 0x11, 0x22, 0x33, 0x44 };
1160 return u.u;
1161#endif
1162}
1163
1164ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1165ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1166ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1167ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1168
1169#if ECB_GCC_VERSION(3,0) || ECB_C99
1170 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1171#else
1172 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1173#endif
1174
1175#if ECB_CPP
1176 template<typename T>
1177 static inline T ecb_div_rd (T val, T div)
1178 {
1179 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1180 }
1181 template<typename T>
1182 static inline T ecb_div_ru (T val, T div)
1183 {
1184 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1185 }
1186#else
1187 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1188 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1189#endif
1190
1191#if ecb_cplusplus_does_not_suck
1192 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1193 template<typename T, int N>
1194 static inline int ecb_array_length (const T (&arr)[N])
1195 {
1196 return N;
1197 }
1198#else
1199 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1200#endif
1201
1202ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1203ecb_function_ ecb_const uint32_t
1204ecb_binary16_to_binary32 (uint32_t x)
1205{
1206 unsigned int s = (x & 0x8000) << (31 - 15);
1207 int e = (x >> 10) & 0x001f;
1208 unsigned int m = x & 0x03ff;
1209
1210 if (ecb_expect_false (e == 31))
1211 /* infinity or NaN */
1212 e = 255 - (127 - 15);
1213 else if (ecb_expect_false (!e))
1214 {
1215 if (ecb_expect_true (!m))
1216 /* zero, handled by code below by forcing e to 0 */
1217 e = 0 - (127 - 15);
1218 else
1219 {
1220 /* subnormal, renormalise */
1221 unsigned int s = 10 - ecb_ld32 (m);
1222
1223 m = (m << s) & 0x3ff; /* mask implicit bit */
1224 e -= s - 1;
1225 }
1226 }
1227
1228 /* e and m now are normalised, or zero, (or inf or nan) */
1229 e += 127 - 15;
1230
1231 return s | (e << 23) | (m << (23 - 10));
1232}
1233
1234ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1235ecb_function_ ecb_const uint16_t
1236ecb_binary32_to_binary16 (uint32_t x)
1237{
1238 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1239 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1240 unsigned int m = x & 0x007fffff;
1241
1242 x &= 0x7fffffff;
1243
1244 /* if it's within range of binary16 normals, use fast path */
1245 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1246 {
1247 /* mantissa round-to-even */
1248 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1249
1250 /* handle overflow */
1251 if (ecb_expect_false (m >= 0x00800000))
1252 {
1253 m >>= 1;
1254 e += 1;
1255 }
1256
1257 return s | (e << 10) | (m >> (23 - 10));
1258 }
1259
1260 /* handle large numbers and infinity */
1261 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1262 return s | 0x7c00;
1263
1264 /* handle zero, subnormals and small numbers */
1265 if (ecb_expect_true (x < 0x38800000))
1266 {
1267 /* zero */
1268 if (ecb_expect_true (!x))
1269 return s;
1270
1271 /* handle subnormals */
1272
1273 /* too small, will be zero */
1274 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1275 return s;
1276
1277 m |= 0x00800000; /* make implicit bit explicit */
1278
1279 /* very tricky - we need to round to the nearest e (+10) bit value */
1280 {
1281 unsigned int bits = 14 - e;
1282 unsigned int half = (1 << (bits - 1)) - 1;
1283 unsigned int even = (m >> bits) & 1;
1284
1285 /* if this overflows, we will end up with a normalised number */
1286 m = (m + half + even) >> bits;
1287 }
1288
1289 return s | m;
1290 }
1291
1292 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1293 m >>= 13;
1294
1295 return s | 0x7c00 | m | !m;
1296}
1297
1298/*******************************************************************************/
1299/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1300
1301/* basically, everything uses "ieee pure-endian" floating point numbers */
1302/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1303#if 0 \
1304 || __i386 || __i386__ \
1305 || ECB_GCC_AMD64 \
1306 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1307 || defined __s390__ || defined __s390x__ \
1308 || defined __mips__ \
1309 || defined __alpha__ \
1310 || defined __hppa__ \
1311 || defined __ia64__ \
1312 || defined __m68k__ \
1313 || defined __m88k__ \
1314 || defined __sh__ \
1315 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1316 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1317 || defined __aarch64__
1318 #define ECB_STDFP 1
1319 #include <string.h> /* for memcpy */
1320#else
1321 #define ECB_STDFP 0
1322#endif
1323
1324#ifndef ECB_NO_LIBM
1325
1326 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1327
1328 /* only the oldest of old doesn't have this one. solaris. */
1329 #ifdef INFINITY
1330 #define ECB_INFINITY INFINITY
1331 #else
1332 #define ECB_INFINITY HUGE_VAL
1333 #endif
1334
1335 #ifdef NAN
1336 #define ECB_NAN NAN
1337 #else
1338 #define ECB_NAN ECB_INFINITY
1339 #endif
1340
1341 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1342 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1343 #define ecb_frexpf(x,e) frexpf ((x), (e))
1344 #else
1345 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1346 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1347 #endif
1348
1349 /* convert a float to ieee single/binary32 */
1350 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1351 ecb_function_ ecb_const uint32_t
1352 ecb_float_to_binary32 (float x)
1353 {
1354 uint32_t r;
1355
1356 #if ECB_STDFP
1357 memcpy (&r, &x, 4);
1358 #else
1359 /* slow emulation, works for anything but -0 */
1360 uint32_t m;
1361 int e;
1362
1363 if (x == 0e0f ) return 0x00000000U;
1364 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1365 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1366 if (x != x ) return 0x7fbfffffU;
1367
1368 m = ecb_frexpf (x, &e) * 0x1000000U;
1369
1370 r = m & 0x80000000U;
1371
1372 if (r)
1373 m = -m;
1374
1375 if (e <= -126)
1376 {
1377 m &= 0xffffffU;
1378 m >>= (-125 - e);
1379 e = -126;
1380 }
1381
1382 r |= (e + 126) << 23;
1383 r |= m & 0x7fffffU;
1384 #endif
1385
1386 return r;
1387 }
1388
1389 /* converts an ieee single/binary32 to a float */
1390 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1391 ecb_function_ ecb_const float
1392 ecb_binary32_to_float (uint32_t x)
1393 {
1394 float r;
1395
1396 #if ECB_STDFP
1397 memcpy (&r, &x, 4);
1398 #else
1399 /* emulation, only works for normals and subnormals and +0 */
1400 int neg = x >> 31;
1401 int e = (x >> 23) & 0xffU;
1402
1403 x &= 0x7fffffU;
1404
1405 if (e)
1406 x |= 0x800000U;
1407 else
1408 e = 1;
1409
1410 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1411 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1412
1413 r = neg ? -r : r;
1414 #endif
1415
1416 return r;
1417 }
1418
1419 /* convert a double to ieee double/binary64 */
1420 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1421 ecb_function_ ecb_const uint64_t
1422 ecb_double_to_binary64 (double x)
1423 {
1424 uint64_t r;
1425
1426 #if ECB_STDFP
1427 memcpy (&r, &x, 8);
1428 #else
1429 /* slow emulation, works for anything but -0 */
1430 uint64_t m;
1431 int e;
1432
1433 if (x == 0e0 ) return 0x0000000000000000U;
1434 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1435 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1436 if (x != x ) return 0X7ff7ffffffffffffU;
1437
1438 m = frexp (x, &e) * 0x20000000000000U;
1439
1440 r = m & 0x8000000000000000;;
1441
1442 if (r)
1443 m = -m;
1444
1445 if (e <= -1022)
1446 {
1447 m &= 0x1fffffffffffffU;
1448 m >>= (-1021 - e);
1449 e = -1022;
1450 }
1451
1452 r |= ((uint64_t)(e + 1022)) << 52;
1453 r |= m & 0xfffffffffffffU;
1454 #endif
1455
1456 return r;
1457 }
1458
1459 /* converts an ieee double/binary64 to a double */
1460 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1461 ecb_function_ ecb_const double
1462 ecb_binary64_to_double (uint64_t x)
1463 {
1464 double r;
1465
1466 #if ECB_STDFP
1467 memcpy (&r, &x, 8);
1468 #else
1469 /* emulation, only works for normals and subnormals and +0 */
1470 int neg = x >> 63;
1471 int e = (x >> 52) & 0x7ffU;
1472
1473 x &= 0xfffffffffffffU;
1474
1475 if (e)
1476 x |= 0x10000000000000U;
1477 else
1478 e = 1;
1479
1480 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1481 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1482
1483 r = neg ? -r : r;
1484 #endif
1485
1486 return r;
1487 }
1488
1489 /* convert a float to ieee half/binary16 */
1490 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1491 ecb_function_ ecb_const uint16_t
1492 ecb_float_to_binary16 (float x)
1493 {
1494 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1495 }
1496
1497 /* convert an ieee half/binary16 to float */
1498 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1499 ecb_function_ ecb_const float
1500 ecb_binary16_to_float (uint16_t x)
1501 {
1502 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1503 }
1504
1505#endif
1506
1507#endif
1508
1509/* ECB.H END */
1510
1511#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1512/* if your architecture doesn't need memory fences, e.g. because it is
1513 * single-cpu/core, or if you use libev in a project that doesn't use libev
1514 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1515 * libev, in which cases the memory fences become nops.
1516 * alternatively, you can remove this #error and link against libpthread,
1517 * which will then provide the memory fences.
1518 */
1519# error "memory fences not defined for your architecture, please report"
1520#endif
1521
1522#ifndef ECB_MEMORY_FENCE
1523# define ECB_MEMORY_FENCE do { } while (0)
1524# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1525# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1526#endif
1527
1528#define expect_false(cond) ecb_expect_false (cond)
1529#define expect_true(cond) ecb_expect_true (cond)
1530#define noinline ecb_noinline
1531
476#define inline_size static inline 1532#define inline_size ecb_inline
477 1533
478#if EV_FEATURE_CODE 1534#if EV_FEATURE_CODE
479# define inline_speed static inline 1535# define inline_speed ecb_inline
480#else 1536#else
481# define inline_speed static noinline 1537# define inline_speed noinline static
482#endif 1538#endif
483 1539
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1540#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485 1541
486#if EV_MINPRI == EV_MAXPRI 1542#if EV_MINPRI == EV_MAXPRI
… …
523# include "ev_win32.c" 1579# include "ev_win32.c"
524#endif 1580#endif
525 1581
526/*****************************************************************************/ 1582/*****************************************************************************/
527 1583
1584/* define a suitable floor function (only used by periodics atm) */
1585
1586#if EV_USE_FLOOR
1587# include <math.h>
1588# define ev_floor(v) floor (v)
1589#else
1590
1591#include <float.h>
1592
1593/* a floor() replacement function, should be independent of ev_tstamp type */
1594noinline
1595static ev_tstamp
1596ev_floor (ev_tstamp v)
1597{
1598 /* the choice of shift factor is not terribly important */
1599#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1600 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1601#else
1602 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1603#endif
1604
1605 /* argument too large for an unsigned long? */
1606 if (expect_false (v >= shift))
1607 {
1608 ev_tstamp f;
1609
1610 if (v == v - 1.)
1611 return v; /* very large number */
1612
1613 f = shift * ev_floor (v * (1. / shift));
1614 return f + ev_floor (v - f);
1615 }
1616
1617 /* special treatment for negative args? */
1618 if (expect_false (v < 0.))
1619 {
1620 ev_tstamp f = -ev_floor (-v);
1621
1622 return f - (f == v ? 0 : 1);
1623 }
1624
1625 /* fits into an unsigned long */
1626 return (unsigned long)v;
1627}
1628
1629#endif
1630
1631/*****************************************************************************/
1632
528#ifdef __linux 1633#ifdef __linux
529# include <sys/utsname.h> 1634# include <sys/utsname.h>
530#endif 1635#endif
531 1636
1637noinline ecb_cold
532static unsigned int noinline 1638static unsigned int
533ev_linux_version (void) 1639ev_linux_version (void)
534{ 1640{
535#ifdef __linux 1641#ifdef __linux
536 unsigned int v = 0; 1642 unsigned int v = 0;
537 struct utsname buf; 1643 struct utsname buf;
… …
566} 1672}
567 1673
568/*****************************************************************************/ 1674/*****************************************************************************/
569 1675
570#if EV_AVOID_STDIO 1676#if EV_AVOID_STDIO
571static void noinline 1677noinline ecb_cold
1678static void
572ev_printerr (const char *msg) 1679ev_printerr (const char *msg)
573{ 1680{
574 write (STDERR_FILENO, msg, strlen (msg)); 1681 write (STDERR_FILENO, msg, strlen (msg));
575} 1682}
576#endif 1683#endif
577 1684
578static void (*syserr_cb)(const char *msg); 1685static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
579 1686
1687ecb_cold
580void 1688void
581ev_set_syserr_cb (void (*cb)(const char *msg)) 1689ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
582{ 1690{
583 syserr_cb = cb; 1691 syserr_cb = cb;
584} 1692}
585 1693
586static void noinline 1694noinline ecb_cold
1695static void
587ev_syserr (const char *msg) 1696ev_syserr (const char *msg)
588{ 1697{
589 if (!msg) 1698 if (!msg)
590 msg = "(libev) system error"; 1699 msg = "(libev) system error";
591 1700
… …
604 abort (); 1713 abort ();
605 } 1714 }
606} 1715}
607 1716
608static void * 1717static void *
609ev_realloc_emul (void *ptr, long size) 1718ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
610{ 1719{
611#if __GLIBC__
612 return realloc (ptr, size);
613#else
614 /* some systems, notably openbsd and darwin, fail to properly 1720 /* some systems, notably openbsd and darwin, fail to properly
615 * implement realloc (x, 0) (as required by both ansi c-89 and 1721 * implement realloc (x, 0) (as required by both ansi c-89 and
616 * the single unix specification, so work around them here. 1722 * the single unix specification, so work around them here.
1723 * recently, also (at least) fedora and debian started breaking it,
1724 * despite documenting it otherwise.
617 */ 1725 */
618 1726
619 if (size) 1727 if (size)
620 return realloc (ptr, size); 1728 return realloc (ptr, size);
621 1729
622 free (ptr); 1730 free (ptr);
623 return 0; 1731 return 0;
624#endif
625} 1732}
626 1733
627static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1734static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
628 1735
1736ecb_cold
629void 1737void
630ev_set_allocator (void *(*cb)(void *ptr, long size)) 1738ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
631{ 1739{
632 alloc = cb; 1740 alloc = cb;
633} 1741}
634 1742
635inline_speed void * 1743inline_speed void *
… …
723 #undef VAR 1831 #undef VAR
724 }; 1832 };
725 #include "ev_wrap.h" 1833 #include "ev_wrap.h"
726 1834
727 static struct ev_loop default_loop_struct; 1835 static struct ev_loop default_loop_struct;
728 struct ev_loop *ev_default_loop_ptr; 1836 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
729 1837
730#else 1838#else
731 1839
732 ev_tstamp ev_rt_now; 1840 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
733 #define VAR(name,decl) static decl; 1841 #define VAR(name,decl) static decl;
734 #include "ev_vars.h" 1842 #include "ev_vars.h"
735 #undef VAR 1843 #undef VAR
736 1844
737 static int ev_default_loop_ptr; 1845 static int ev_default_loop_ptr;
… …
752 1860
753/*****************************************************************************/ 1861/*****************************************************************************/
754 1862
755#ifndef EV_HAVE_EV_TIME 1863#ifndef EV_HAVE_EV_TIME
756ev_tstamp 1864ev_tstamp
757ev_time (void) 1865ev_time (void) EV_NOEXCEPT
758{ 1866{
759#if EV_USE_REALTIME 1867#if EV_USE_REALTIME
760 if (expect_true (have_realtime)) 1868 if (expect_true (have_realtime))
761 { 1869 {
762 struct timespec ts; 1870 struct timespec ts;
… …
786 return ev_time (); 1894 return ev_time ();
787} 1895}
788 1896
789#if EV_MULTIPLICITY 1897#if EV_MULTIPLICITY
790ev_tstamp 1898ev_tstamp
791ev_now (EV_P) 1899ev_now (EV_P) EV_NOEXCEPT
792{ 1900{
793 return ev_rt_now; 1901 return ev_rt_now;
794} 1902}
795#endif 1903#endif
796 1904
797void 1905void
798ev_sleep (ev_tstamp delay) 1906ev_sleep (ev_tstamp delay) EV_NOEXCEPT
799{ 1907{
800 if (delay > 0.) 1908 if (delay > 0.)
801 { 1909 {
802#if EV_USE_NANOSLEEP 1910#if EV_USE_NANOSLEEP
803 struct timespec ts; 1911 struct timespec ts;
804 1912
805 EV_TS_SET (ts, delay); 1913 EV_TS_SET (ts, delay);
806 nanosleep (&ts, 0); 1914 nanosleep (&ts, 0);
807#elif defined(_WIN32) 1915#elif defined _WIN32
1916 /* maybe this should round up, as ms is very low resolution */
1917 /* compared to select (µs) or nanosleep (ns) */
808 Sleep ((unsigned long)(delay * 1e3)); 1918 Sleep ((unsigned long)(delay * 1e3));
809#else 1919#else
810 struct timeval tv; 1920 struct timeval tv;
811 1921
812 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1922 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
816 select (0, 0, 0, 0, &tv); 1926 select (0, 0, 0, 0, &tv);
817#endif 1927#endif
818 } 1928 }
819} 1929}
820 1930
821inline_speed int
822ev_timeout_to_ms (ev_tstamp timeout)
823{
824 int ms = timeout * 1000. + .999999;
825
826 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
827}
828
829/*****************************************************************************/ 1931/*****************************************************************************/
830 1932
831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1933#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
832 1934
833/* find a suitable new size for the given array, */ 1935/* find a suitable new size for the given array, */
… …
839 1941
840 do 1942 do
841 ncur <<= 1; 1943 ncur <<= 1;
842 while (cnt > ncur); 1944 while (cnt > ncur);
843 1945
844 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1946 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1947 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
846 { 1948 {
847 ncur *= elem; 1949 ncur *= elem;
848 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1950 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
849 ncur = ncur - sizeof (void *) * 4; 1951 ncur = ncur - sizeof (void *) * 4;
… …
851 } 1953 }
852 1954
853 return ncur; 1955 return ncur;
854} 1956}
855 1957
856static noinline void * 1958noinline ecb_cold
1959static void *
857array_realloc (int elem, void *base, int *cur, int cnt) 1960array_realloc (int elem, void *base, int *cur, int cnt)
858{ 1961{
859 *cur = array_nextsize (elem, *cur, cnt); 1962 *cur = array_nextsize (elem, *cur, cnt);
860 return ev_realloc (base, elem * *cur); 1963 return ev_realloc (base, elem * *cur);
861} 1964}
… …
864 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1967 memset ((void *)(base), 0, sizeof (*(base)) * (count))
865 1968
866#define array_needsize(type,base,cur,cnt,init) \ 1969#define array_needsize(type,base,cur,cnt,init) \
867 if (expect_false ((cnt) > (cur))) \ 1970 if (expect_false ((cnt) > (cur))) \
868 { \ 1971 { \
869 int ocur_ = (cur); \ 1972 ecb_unused int ocur_ = (cur); \
870 (base) = (type *)array_realloc \ 1973 (base) = (type *)array_realloc \
871 (sizeof (type), (base), &(cur), (cnt)); \ 1974 (sizeof (type), (base), &(cur), (cnt)); \
872 init ((base) + (ocur_), (cur) - ocur_); \ 1975 init ((base) + (ocur_), (cur) - ocur_); \
873 } 1976 }
874 1977
… …
886 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 1989 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
887 1990
888/*****************************************************************************/ 1991/*****************************************************************************/
889 1992
890/* dummy callback for pending events */ 1993/* dummy callback for pending events */
891static void noinline 1994noinline
1995static void
892pendingcb (EV_P_ ev_prepare *w, int revents) 1996pendingcb (EV_P_ ev_prepare *w, int revents)
893{ 1997{
894} 1998}
895 1999
896void noinline 2000noinline
2001void
897ev_feed_event (EV_P_ void *w, int revents) 2002ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
898{ 2003{
899 W w_ = (W)w; 2004 W w_ = (W)w;
900 int pri = ABSPRI (w_); 2005 int pri = ABSPRI (w_);
901 2006
902 if (expect_false (w_->pending)) 2007 if (expect_false (w_->pending))
… …
906 w_->pending = ++pendingcnt [pri]; 2011 w_->pending = ++pendingcnt [pri];
907 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2012 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
908 pendings [pri][w_->pending - 1].w = w_; 2013 pendings [pri][w_->pending - 1].w = w_;
909 pendings [pri][w_->pending - 1].events = revents; 2014 pendings [pri][w_->pending - 1].events = revents;
910 } 2015 }
2016
2017 pendingpri = NUMPRI - 1;
911} 2018}
912 2019
913inline_speed void 2020inline_speed void
914feed_reverse (EV_P_ W w) 2021feed_reverse (EV_P_ W w)
915{ 2022{
… …
961 if (expect_true (!anfd->reify)) 2068 if (expect_true (!anfd->reify))
962 fd_event_nocheck (EV_A_ fd, revents); 2069 fd_event_nocheck (EV_A_ fd, revents);
963} 2070}
964 2071
965void 2072void
966ev_feed_fd_event (EV_P_ int fd, int revents) 2073ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
967{ 2074{
968 if (fd >= 0 && fd < anfdmax) 2075 if (fd >= 0 && fd < anfdmax)
969 fd_event_nocheck (EV_A_ fd, revents); 2076 fd_event_nocheck (EV_A_ fd, revents);
970} 2077}
971 2078
… …
980 for (i = 0; i < fdchangecnt; ++i) 2087 for (i = 0; i < fdchangecnt; ++i)
981 { 2088 {
982 int fd = fdchanges [i]; 2089 int fd = fdchanges [i];
983 ANFD *anfd = anfds + fd; 2090 ANFD *anfd = anfds + fd;
984 2091
985 if (anfd->reify & EV__IOFDSET) 2092 if (anfd->reify & EV__IOFDSET && anfd->head)
986 { 2093 {
987 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd); 2094 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
988 2095
989 if (handle != anfd->handle) 2096 if (handle != anfd->handle)
990 { 2097 {
… …
1029 2136
1030 fdchangecnt = 0; 2137 fdchangecnt = 0;
1031} 2138}
1032 2139
1033/* something about the given fd changed */ 2140/* something about the given fd changed */
1034inline_size void 2141inline_size
2142void
1035fd_change (EV_P_ int fd, int flags) 2143fd_change (EV_P_ int fd, int flags)
1036{ 2144{
1037 unsigned char reify = anfds [fd].reify; 2145 unsigned char reify = anfds [fd].reify;
1038 anfds [fd].reify |= flags; 2146 anfds [fd].reify |= flags;
1039 2147
… …
1044 fdchanges [fdchangecnt - 1] = fd; 2152 fdchanges [fdchangecnt - 1] = fd;
1045 } 2153 }
1046} 2154}
1047 2155
1048/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2156/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1049inline_speed void 2157inline_speed ecb_cold void
1050fd_kill (EV_P_ int fd) 2158fd_kill (EV_P_ int fd)
1051{ 2159{
1052 ev_io *w; 2160 ev_io *w;
1053 2161
1054 while ((w = (ev_io *)anfds [fd].head)) 2162 while ((w = (ev_io *)anfds [fd].head))
… …
1057 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2165 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1058 } 2166 }
1059} 2167}
1060 2168
1061/* check whether the given fd is actually valid, for error recovery */ 2169/* check whether the given fd is actually valid, for error recovery */
1062inline_size int 2170inline_size ecb_cold int
1063fd_valid (int fd) 2171fd_valid (int fd)
1064{ 2172{
1065#ifdef _WIN32 2173#ifdef _WIN32
1066 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2174 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1067#else 2175#else
1068 return fcntl (fd, F_GETFD) != -1; 2176 return fcntl (fd, F_GETFD) != -1;
1069#endif 2177#endif
1070} 2178}
1071 2179
1072/* called on EBADF to verify fds */ 2180/* called on EBADF to verify fds */
1073static void noinline 2181noinline ecb_cold
2182static void
1074fd_ebadf (EV_P) 2183fd_ebadf (EV_P)
1075{ 2184{
1076 int fd; 2185 int fd;
1077 2186
1078 for (fd = 0; fd < anfdmax; ++fd) 2187 for (fd = 0; fd < anfdmax; ++fd)
… …
1080 if (!fd_valid (fd) && errno == EBADF) 2189 if (!fd_valid (fd) && errno == EBADF)
1081 fd_kill (EV_A_ fd); 2190 fd_kill (EV_A_ fd);
1082} 2191}
1083 2192
1084/* called on ENOMEM in select/poll to kill some fds and retry */ 2193/* called on ENOMEM in select/poll to kill some fds and retry */
1085static void noinline 2194noinline ecb_cold
2195static void
1086fd_enomem (EV_P) 2196fd_enomem (EV_P)
1087{ 2197{
1088 int fd; 2198 int fd;
1089 2199
1090 for (fd = anfdmax; fd--; ) 2200 for (fd = anfdmax; fd--; )
… …
1094 break; 2204 break;
1095 } 2205 }
1096} 2206}
1097 2207
1098/* usually called after fork if backend needs to re-arm all fds from scratch */ 2208/* usually called after fork if backend needs to re-arm all fds from scratch */
1099static void noinline 2209noinline
2210static void
1100fd_rearm_all (EV_P) 2211fd_rearm_all (EV_P)
1101{ 2212{
1102 int fd; 2213 int fd;
1103 2214
1104 for (fd = 0; fd < anfdmax; ++fd) 2215 for (fd = 0; fd < anfdmax; ++fd)
… …
1285 2396
1286/*****************************************************************************/ 2397/*****************************************************************************/
1287 2398
1288#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2399#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1289 2400
1290static void noinline 2401noinline ecb_cold
2402static void
1291evpipe_init (EV_P) 2403evpipe_init (EV_P)
1292{ 2404{
1293 if (!ev_is_active (&pipe_w)) 2405 if (!ev_is_active (&pipe_w))
1294 { 2406 {
2407 int fds [2];
2408
1295# if EV_USE_EVENTFD 2409# if EV_USE_EVENTFD
2410 fds [0] = -1;
1296 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2411 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1297 if (evfd < 0 && errno == EINVAL) 2412 if (fds [1] < 0 && errno == EINVAL)
1298 evfd = eventfd (0, 0); 2413 fds [1] = eventfd (0, 0);
1299 2414
1300 if (evfd >= 0) 2415 if (fds [1] < 0)
2416# endif
1301 { 2417 {
2418 while (pipe (fds))
2419 ev_syserr ("(libev) error creating signal/async pipe");
2420
2421 fd_intern (fds [0]);
2422 }
2423
1302 evpipe [0] = -1; 2424 evpipe [0] = fds [0];
1303 fd_intern (evfd); /* doing it twice doesn't hurt */ 2425
1304 ev_io_set (&pipe_w, evfd, EV_READ); 2426 if (evpipe [1] < 0)
2427 evpipe [1] = fds [1]; /* first call, set write fd */
2428 else
2429 {
2430 /* on subsequent calls, do not change evpipe [1] */
2431 /* so that evpipe_write can always rely on its value. */
2432 /* this branch does not do anything sensible on windows, */
2433 /* so must not be executed on windows */
2434
2435 dup2 (fds [1], evpipe [1]);
2436 close (fds [1]);
2437 }
2438
2439 fd_intern (evpipe [1]);
2440
2441 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2442 ev_io_start (EV_A_ &pipe_w);
2443 ev_unref (EV_A); /* watcher should not keep loop alive */
2444 }
2445}
2446
2447inline_speed void
2448evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2449{
2450 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2451
2452 if (expect_true (*flag))
2453 return;
2454
2455 *flag = 1;
2456 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2457
2458 pipe_write_skipped = 1;
2459
2460 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2461
2462 if (pipe_write_wanted)
2463 {
2464 int old_errno;
2465
2466 pipe_write_skipped = 0;
2467 ECB_MEMORY_FENCE_RELEASE;
2468
2469 old_errno = errno; /* save errno because write will clobber it */
2470
2471#if EV_USE_EVENTFD
2472 if (evpipe [0] < 0)
2473 {
2474 uint64_t counter = 1;
2475 write (evpipe [1], &counter, sizeof (uint64_t));
1305 } 2476 }
1306 else 2477 else
1307# endif 2478#endif
1308 { 2479 {
1309 while (pipe (evpipe)) 2480#ifdef _WIN32
1310 ev_syserr ("(libev) error creating signal/async pipe"); 2481 WSABUF buf;
1311 2482 DWORD sent;
1312 fd_intern (evpipe [0]); 2483 buf.buf = (char *)&buf;
1313 fd_intern (evpipe [1]); 2484 buf.len = 1;
1314 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2485 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2486#else
2487 write (evpipe [1], &(evpipe [1]), 1);
2488#endif
1315 } 2489 }
1316
1317 ev_io_start (EV_A_ &pipe_w);
1318 ev_unref (EV_A); /* watcher should not keep loop alive */
1319 }
1320}
1321
1322inline_size void
1323evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1324{
1325 if (!*flag)
1326 {
1327 int old_errno = errno; /* save errno because write might clobber it */
1328 char dummy;
1329
1330 *flag = 1;
1331
1332#if EV_USE_EVENTFD
1333 if (evfd >= 0)
1334 {
1335 uint64_t counter = 1;
1336 write (evfd, &counter, sizeof (uint64_t));
1337 }
1338 else
1339#endif
1340 /* win32 people keep sending patches that change this write() to send() */
1341 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1342 /* so when you think this write should be a send instead, please find out */
1343 /* where your send() is from - it's definitely not the microsoft send, and */
1344 /* tell me. thank you. */
1345 write (evpipe [1], &dummy, 1);
1346 2490
1347 errno = old_errno; 2491 errno = old_errno;
1348 } 2492 }
1349} 2493}
1350 2494
… …
1353static void 2497static void
1354pipecb (EV_P_ ev_io *iow, int revents) 2498pipecb (EV_P_ ev_io *iow, int revents)
1355{ 2499{
1356 int i; 2500 int i;
1357 2501
2502 if (revents & EV_READ)
2503 {
1358#if EV_USE_EVENTFD 2504#if EV_USE_EVENTFD
1359 if (evfd >= 0) 2505 if (evpipe [0] < 0)
1360 { 2506 {
1361 uint64_t counter; 2507 uint64_t counter;
1362 read (evfd, &counter, sizeof (uint64_t)); 2508 read (evpipe [1], &counter, sizeof (uint64_t));
1363 } 2509 }
1364 else 2510 else
1365#endif 2511#endif
1366 { 2512 {
1367 char dummy; 2513 char dummy[4];
1368 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2514#ifdef _WIN32
2515 WSABUF buf;
2516 DWORD recvd;
2517 DWORD flags = 0;
2518 buf.buf = dummy;
2519 buf.len = sizeof (dummy);
2520 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2521#else
1369 read (evpipe [0], &dummy, 1); 2522 read (evpipe [0], &dummy, sizeof (dummy));
2523#endif
2524 }
1370 } 2525 }
2526
2527 pipe_write_skipped = 0;
2528
2529 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1371 2530
1372#if EV_SIGNAL_ENABLE 2531#if EV_SIGNAL_ENABLE
1373 if (sig_pending) 2532 if (sig_pending)
1374 { 2533 {
1375 sig_pending = 0; 2534 sig_pending = 0;
2535
2536 ECB_MEMORY_FENCE;
1376 2537
1377 for (i = EV_NSIG - 1; i--; ) 2538 for (i = EV_NSIG - 1; i--; )
1378 if (expect_false (signals [i].pending)) 2539 if (expect_false (signals [i].pending))
1379 ev_feed_signal_event (EV_A_ i + 1); 2540 ev_feed_signal_event (EV_A_ i + 1);
1380 } 2541 }
… …
1382 2543
1383#if EV_ASYNC_ENABLE 2544#if EV_ASYNC_ENABLE
1384 if (async_pending) 2545 if (async_pending)
1385 { 2546 {
1386 async_pending = 0; 2547 async_pending = 0;
2548
2549 ECB_MEMORY_FENCE;
1387 2550
1388 for (i = asynccnt; i--; ) 2551 for (i = asynccnt; i--; )
1389 if (asyncs [i]->sent) 2552 if (asyncs [i]->sent)
1390 { 2553 {
1391 asyncs [i]->sent = 0; 2554 asyncs [i]->sent = 0;
2555 ECB_MEMORY_FENCE_RELEASE;
1392 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2556 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1393 } 2557 }
1394 } 2558 }
1395#endif 2559#endif
1396} 2560}
1397 2561
1398/*****************************************************************************/ 2562/*****************************************************************************/
1399 2563
1400void 2564void
1401ev_feed_signal (int signum) 2565ev_feed_signal (int signum) EV_NOEXCEPT
1402{ 2566{
1403#if EV_MULTIPLICITY 2567#if EV_MULTIPLICITY
2568 EV_P;
2569 ECB_MEMORY_FENCE_ACQUIRE;
1404 EV_P = signals [signum - 1].loop; 2570 EV_A = signals [signum - 1].loop;
1405 2571
1406 if (!EV_A) 2572 if (!EV_A)
1407 return; 2573 return;
1408#endif 2574#endif
1409 2575
… …
1419#endif 2585#endif
1420 2586
1421 ev_feed_signal (signum); 2587 ev_feed_signal (signum);
1422} 2588}
1423 2589
1424void noinline 2590noinline
2591void
1425ev_feed_signal_event (EV_P_ int signum) 2592ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1426{ 2593{
1427 WL w; 2594 WL w;
1428 2595
1429 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2596 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1430 return; 2597 return;
1431 2598
1432 --signum; 2599 --signum;
1433 2600
1434#if EV_MULTIPLICITY 2601#if EV_MULTIPLICITY
… …
1438 if (expect_false (signals [signum].loop != EV_A)) 2605 if (expect_false (signals [signum].loop != EV_A))
1439 return; 2606 return;
1440#endif 2607#endif
1441 2608
1442 signals [signum].pending = 0; 2609 signals [signum].pending = 0;
2610 ECB_MEMORY_FENCE_RELEASE;
1443 2611
1444 for (w = signals [signum].head; w; w = w->next) 2612 for (w = signals [signum].head; w; w = w->next)
1445 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2613 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1446} 2614}
1447 2615
… …
1545#endif 2713#endif
1546#if EV_USE_SELECT 2714#if EV_USE_SELECT
1547# include "ev_select.c" 2715# include "ev_select.c"
1548#endif 2716#endif
1549 2717
1550int 2718ecb_cold int
1551ev_version_major (void) 2719ev_version_major (void) EV_NOEXCEPT
1552{ 2720{
1553 return EV_VERSION_MAJOR; 2721 return EV_VERSION_MAJOR;
1554} 2722}
1555 2723
1556int 2724ecb_cold int
1557ev_version_minor (void) 2725ev_version_minor (void) EV_NOEXCEPT
1558{ 2726{
1559 return EV_VERSION_MINOR; 2727 return EV_VERSION_MINOR;
1560} 2728}
1561 2729
1562/* return true if we are running with elevated privileges and should ignore env variables */ 2730/* return true if we are running with elevated privileges and should ignore env variables */
1563int inline_size 2731inline_size ecb_cold int
1564enable_secure (void) 2732enable_secure (void)
1565{ 2733{
1566#ifdef _WIN32 2734#ifdef _WIN32
1567 return 0; 2735 return 0;
1568#else 2736#else
1569 return getuid () != geteuid () 2737 return getuid () != geteuid ()
1570 || getgid () != getegid (); 2738 || getgid () != getegid ();
1571#endif 2739#endif
1572} 2740}
1573 2741
2742ecb_cold
1574unsigned int 2743unsigned int
1575ev_supported_backends (void) 2744ev_supported_backends (void) EV_NOEXCEPT
1576{ 2745{
1577 unsigned int flags = 0; 2746 unsigned int flags = 0;
1578 2747
1579 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2748 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1580 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2749 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1583 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2752 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1584 2753
1585 return flags; 2754 return flags;
1586} 2755}
1587 2756
2757ecb_cold
1588unsigned int 2758unsigned int
1589ev_recommended_backends (void) 2759ev_recommended_backends (void) EV_NOEXCEPT
1590{ 2760{
1591 unsigned int flags = ev_supported_backends (); 2761 unsigned int flags = ev_supported_backends ();
1592 2762
1593#ifndef __NetBSD__ 2763#ifndef __NetBSD__
1594 /* kqueue is borked on everything but netbsd apparently */ 2764 /* kqueue is borked on everything but netbsd apparently */
… …
1605#endif 2775#endif
1606 2776
1607 return flags; 2777 return flags;
1608} 2778}
1609 2779
2780ecb_cold
1610unsigned int 2781unsigned int
1611ev_embeddable_backends (void) 2782ev_embeddable_backends (void) EV_NOEXCEPT
1612{ 2783{
1613 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2784 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1614 2785
1615 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2786 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1616 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2787 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1618 2789
1619 return flags; 2790 return flags;
1620} 2791}
1621 2792
1622unsigned int 2793unsigned int
1623ev_backend (EV_P) 2794ev_backend (EV_P) EV_NOEXCEPT
1624{ 2795{
1625 return backend; 2796 return backend;
1626} 2797}
1627 2798
1628#if EV_FEATURE_API 2799#if EV_FEATURE_API
1629unsigned int 2800unsigned int
1630ev_iteration (EV_P) 2801ev_iteration (EV_P) EV_NOEXCEPT
1631{ 2802{
1632 return loop_count; 2803 return loop_count;
1633} 2804}
1634 2805
1635unsigned int 2806unsigned int
1636ev_depth (EV_P) 2807ev_depth (EV_P) EV_NOEXCEPT
1637{ 2808{
1638 return loop_depth; 2809 return loop_depth;
1639} 2810}
1640 2811
1641void 2812void
1642ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2813ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1643{ 2814{
1644 io_blocktime = interval; 2815 io_blocktime = interval;
1645} 2816}
1646 2817
1647void 2818void
1648ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2819ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1649{ 2820{
1650 timeout_blocktime = interval; 2821 timeout_blocktime = interval;
1651} 2822}
1652 2823
1653void 2824void
1654ev_set_userdata (EV_P_ void *data) 2825ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1655{ 2826{
1656 userdata = data; 2827 userdata = data;
1657} 2828}
1658 2829
1659void * 2830void *
1660ev_userdata (EV_P) 2831ev_userdata (EV_P) EV_NOEXCEPT
1661{ 2832{
1662 return userdata; 2833 return userdata;
1663} 2834}
1664 2835
2836void
1665void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2837ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1666{ 2838{
1667 invoke_cb = invoke_pending_cb; 2839 invoke_cb = invoke_pending_cb;
1668} 2840}
1669 2841
2842void
1670void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2843ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1671{ 2844{
1672 release_cb = release; 2845 release_cb = release;
1673 acquire_cb = acquire; 2846 acquire_cb = acquire;
1674} 2847}
1675#endif 2848#endif
1676 2849
1677/* initialise a loop structure, must be zero-initialised */ 2850/* initialise a loop structure, must be zero-initialised */
1678static void noinline 2851noinline ecb_cold
2852static void
1679loop_init (EV_P_ unsigned int flags) 2853loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1680{ 2854{
1681 if (!backend) 2855 if (!backend)
1682 { 2856 {
1683 origflags = flags; 2857 origflags = flags;
1684 2858
… …
1711 if (!(flags & EVFLAG_NOENV) 2885 if (!(flags & EVFLAG_NOENV)
1712 && !enable_secure () 2886 && !enable_secure ()
1713 && getenv ("LIBEV_FLAGS")) 2887 && getenv ("LIBEV_FLAGS"))
1714 flags = atoi (getenv ("LIBEV_FLAGS")); 2888 flags = atoi (getenv ("LIBEV_FLAGS"));
1715 2889
1716 ev_rt_now = ev_time (); 2890 ev_rt_now = ev_time ();
1717 mn_now = get_clock (); 2891 mn_now = get_clock ();
1718 now_floor = mn_now; 2892 now_floor = mn_now;
1719 rtmn_diff = ev_rt_now - mn_now; 2893 rtmn_diff = ev_rt_now - mn_now;
1720#if EV_FEATURE_API 2894#if EV_FEATURE_API
1721 invoke_cb = ev_invoke_pending; 2895 invoke_cb = ev_invoke_pending;
1722#endif 2896#endif
1723 2897
1724 io_blocktime = 0.; 2898 io_blocktime = 0.;
1725 timeout_blocktime = 0.; 2899 timeout_blocktime = 0.;
1726 backend = 0; 2900 backend = 0;
1727 backend_fd = -1; 2901 backend_fd = -1;
1728 sig_pending = 0; 2902 sig_pending = 0;
1729#if EV_ASYNC_ENABLE 2903#if EV_ASYNC_ENABLE
1730 async_pending = 0; 2904 async_pending = 0;
1731#endif 2905#endif
2906 pipe_write_skipped = 0;
2907 pipe_write_wanted = 0;
2908 evpipe [0] = -1;
2909 evpipe [1] = -1;
1732#if EV_USE_INOTIFY 2910#if EV_USE_INOTIFY
1733 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2911 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1734#endif 2912#endif
1735#if EV_USE_SIGNALFD 2913#if EV_USE_SIGNALFD
1736 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2914 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1737#endif 2915#endif
1738 2916
1739 if (!(flags & EVBACKEND_MASK)) 2917 if (!(flags & EVBACKEND_MASK))
1740 flags |= ev_recommended_backends (); 2918 flags |= ev_recommended_backends ();
1741 2919
… …
1766#endif 2944#endif
1767 } 2945 }
1768} 2946}
1769 2947
1770/* free up a loop structure */ 2948/* free up a loop structure */
2949ecb_cold
1771void 2950void
1772ev_loop_destroy (EV_P) 2951ev_loop_destroy (EV_P)
1773{ 2952{
1774 int i; 2953 int i;
1775 2954
… …
1787 EV_INVOKE_PENDING; 2966 EV_INVOKE_PENDING;
1788 } 2967 }
1789#endif 2968#endif
1790 2969
1791#if EV_CHILD_ENABLE 2970#if EV_CHILD_ENABLE
1792 if (ev_is_active (&childev)) 2971 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1793 { 2972 {
1794 ev_ref (EV_A); /* child watcher */ 2973 ev_ref (EV_A); /* child watcher */
1795 ev_signal_stop (EV_A_ &childev); 2974 ev_signal_stop (EV_A_ &childev);
1796 } 2975 }
1797#endif 2976#endif
… …
1799 if (ev_is_active (&pipe_w)) 2978 if (ev_is_active (&pipe_w))
1800 { 2979 {
1801 /*ev_ref (EV_A);*/ 2980 /*ev_ref (EV_A);*/
1802 /*ev_io_stop (EV_A_ &pipe_w);*/ 2981 /*ev_io_stop (EV_A_ &pipe_w);*/
1803 2982
1804#if EV_USE_EVENTFD
1805 if (evfd >= 0)
1806 close (evfd);
1807#endif
1808
1809 if (evpipe [0] >= 0)
1810 {
1811 EV_WIN32_CLOSE_FD (evpipe [0]); 2983 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1812 EV_WIN32_CLOSE_FD (evpipe [1]); 2984 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1813 }
1814 } 2985 }
1815 2986
1816#if EV_USE_SIGNALFD 2987#if EV_USE_SIGNALFD
1817 if (ev_is_active (&sigfd_w)) 2988 if (ev_is_active (&sigfd_w))
1818 close (sigfd); 2989 close (sigfd);
… …
1904#endif 3075#endif
1905#if EV_USE_INOTIFY 3076#if EV_USE_INOTIFY
1906 infy_fork (EV_A); 3077 infy_fork (EV_A);
1907#endif 3078#endif
1908 3079
3080#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1909 if (ev_is_active (&pipe_w)) 3081 if (ev_is_active (&pipe_w) && postfork != 2)
1910 { 3082 {
1911 /* this "locks" the handlers against writing to the pipe */ 3083 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1912 /* while we modify the fd vars */
1913 sig_pending = 1;
1914#if EV_ASYNC_ENABLE
1915 async_pending = 1;
1916#endif
1917 3084
1918 ev_ref (EV_A); 3085 ev_ref (EV_A);
1919 ev_io_stop (EV_A_ &pipe_w); 3086 ev_io_stop (EV_A_ &pipe_w);
1920 3087
1921#if EV_USE_EVENTFD
1922 if (evfd >= 0)
1923 close (evfd);
1924#endif
1925
1926 if (evpipe [0] >= 0) 3088 if (evpipe [0] >= 0)
1927 {
1928 EV_WIN32_CLOSE_FD (evpipe [0]); 3089 EV_WIN32_CLOSE_FD (evpipe [0]);
1929 EV_WIN32_CLOSE_FD (evpipe [1]);
1930 }
1931 3090
1932#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1933 evpipe_init (EV_A); 3091 evpipe_init (EV_A);
1934 /* now iterate over everything, in case we missed something */ 3092 /* iterate over everything, in case we missed something before */
1935 pipecb (EV_A_ &pipe_w, EV_READ); 3093 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1936#endif
1937 } 3094 }
3095#endif
1938 3096
1939 postfork = 0; 3097 postfork = 0;
1940} 3098}
1941 3099
1942#if EV_MULTIPLICITY 3100#if EV_MULTIPLICITY
1943 3101
3102ecb_cold
1944struct ev_loop * 3103struct ev_loop *
1945ev_loop_new (unsigned int flags) 3104ev_loop_new (unsigned int flags) EV_NOEXCEPT
1946{ 3105{
1947 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3106 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1948 3107
1949 memset (EV_A, 0, sizeof (struct ev_loop)); 3108 memset (EV_A, 0, sizeof (struct ev_loop));
1950 loop_init (EV_A_ flags); 3109 loop_init (EV_A_ flags);
… …
1957} 3116}
1958 3117
1959#endif /* multiplicity */ 3118#endif /* multiplicity */
1960 3119
1961#if EV_VERIFY 3120#if EV_VERIFY
1962static void noinline 3121noinline ecb_cold
3122static void
1963verify_watcher (EV_P_ W w) 3123verify_watcher (EV_P_ W w)
1964{ 3124{
1965 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3125 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1966 3126
1967 if (w->pending) 3127 if (w->pending)
1968 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3128 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1969} 3129}
1970 3130
1971static void noinline 3131noinline ecb_cold
3132static void
1972verify_heap (EV_P_ ANHE *heap, int N) 3133verify_heap (EV_P_ ANHE *heap, int N)
1973{ 3134{
1974 int i; 3135 int i;
1975 3136
1976 for (i = HEAP0; i < N + HEAP0; ++i) 3137 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1981 3142
1982 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3143 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1983 } 3144 }
1984} 3145}
1985 3146
1986static void noinline 3147noinline ecb_cold
3148static void
1987array_verify (EV_P_ W *ws, int cnt) 3149array_verify (EV_P_ W *ws, int cnt)
1988{ 3150{
1989 while (cnt--) 3151 while (cnt--)
1990 { 3152 {
1991 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3153 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1993 } 3155 }
1994} 3156}
1995#endif 3157#endif
1996 3158
1997#if EV_FEATURE_API 3159#if EV_FEATURE_API
1998void 3160void ecb_cold
1999ev_verify (EV_P) 3161ev_verify (EV_P) EV_NOEXCEPT
2000{ 3162{
2001#if EV_VERIFY 3163#if EV_VERIFY
2002 int i; 3164 int i;
2003 WL w; 3165 WL w, w2;
2004 3166
2005 assert (activecnt >= -1); 3167 assert (activecnt >= -1);
2006 3168
2007 assert (fdchangemax >= fdchangecnt); 3169 assert (fdchangemax >= fdchangecnt);
2008 for (i = 0; i < fdchangecnt; ++i) 3170 for (i = 0; i < fdchangecnt; ++i)
2009 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3171 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2010 3172
2011 assert (anfdmax >= 0); 3173 assert (anfdmax >= 0);
2012 for (i = 0; i < anfdmax; ++i) 3174 for (i = 0; i < anfdmax; ++i)
3175 {
3176 int j = 0;
3177
2013 for (w = anfds [i].head; w; w = w->next) 3178 for (w = w2 = anfds [i].head; w; w = w->next)
2014 { 3179 {
2015 verify_watcher (EV_A_ (W)w); 3180 verify_watcher (EV_A_ (W)w);
3181
3182 if (j++ & 1)
3183 {
3184 assert (("libev: io watcher list contains a loop", w != w2));
3185 w2 = w2->next;
3186 }
3187
2016 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3188 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2017 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3189 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2018 } 3190 }
3191 }
2019 3192
2020 assert (timermax >= timercnt); 3193 assert (timermax >= timercnt);
2021 verify_heap (EV_A_ timers, timercnt); 3194 verify_heap (EV_A_ timers, timercnt);
2022 3195
2023#if EV_PERIODIC_ENABLE 3196#if EV_PERIODIC_ENABLE
… …
2069#endif 3242#endif
2070} 3243}
2071#endif 3244#endif
2072 3245
2073#if EV_MULTIPLICITY 3246#if EV_MULTIPLICITY
3247ecb_cold
2074struct ev_loop * 3248struct ev_loop *
2075#else 3249#else
2076int 3250int
2077#endif 3251#endif
2078ev_default_loop (unsigned int flags) 3252ev_default_loop (unsigned int flags) EV_NOEXCEPT
2079{ 3253{
2080 if (!ev_default_loop_ptr) 3254 if (!ev_default_loop_ptr)
2081 { 3255 {
2082#if EV_MULTIPLICITY 3256#if EV_MULTIPLICITY
2083 EV_P = ev_default_loop_ptr = &default_loop_struct; 3257 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2102 3276
2103 return ev_default_loop_ptr; 3277 return ev_default_loop_ptr;
2104} 3278}
2105 3279
2106void 3280void
2107ev_loop_fork (EV_P) 3281ev_loop_fork (EV_P) EV_NOEXCEPT
2108{ 3282{
2109 postfork = 1; /* must be in line with ev_default_fork */ 3283 postfork = 1;
2110} 3284}
2111 3285
2112/*****************************************************************************/ 3286/*****************************************************************************/
2113 3287
2114void 3288void
… …
2116{ 3290{
2117 EV_CB_INVOKE ((W)w, revents); 3291 EV_CB_INVOKE ((W)w, revents);
2118} 3292}
2119 3293
2120unsigned int 3294unsigned int
2121ev_pending_count (EV_P) 3295ev_pending_count (EV_P) EV_NOEXCEPT
2122{ 3296{
2123 int pri; 3297 int pri;
2124 unsigned int count = 0; 3298 unsigned int count = 0;
2125 3299
2126 for (pri = NUMPRI; pri--; ) 3300 for (pri = NUMPRI; pri--; )
2127 count += pendingcnt [pri]; 3301 count += pendingcnt [pri];
2128 3302
2129 return count; 3303 return count;
2130} 3304}
2131 3305
2132void noinline 3306noinline
3307void
2133ev_invoke_pending (EV_P) 3308ev_invoke_pending (EV_P)
2134{ 3309{
2135 int pri; 3310 pendingpri = NUMPRI;
2136 3311
2137 for (pri = NUMPRI; pri--; ) 3312 do
3313 {
3314 --pendingpri;
3315
3316 /* pendingpri possibly gets modified in the inner loop */
2138 while (pendingcnt [pri]) 3317 while (pendingcnt [pendingpri])
2139 { 3318 {
2140 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3319 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2141 3320
2142 p->w->pending = 0; 3321 p->w->pending = 0;
2143 EV_CB_INVOKE (p->w, p->events); 3322 EV_CB_INVOKE (p->w, p->events);
2144 EV_FREQUENT_CHECK; 3323 EV_FREQUENT_CHECK;
2145 } 3324 }
3325 }
3326 while (pendingpri);
2146} 3327}
2147 3328
2148#if EV_IDLE_ENABLE 3329#if EV_IDLE_ENABLE
2149/* make idle watchers pending. this handles the "call-idle */ 3330/* make idle watchers pending. this handles the "call-idle */
2150/* only when higher priorities are idle" logic */ 3331/* only when higher priorities are idle" logic */
… …
2208 } 3389 }
2209} 3390}
2210 3391
2211#if EV_PERIODIC_ENABLE 3392#if EV_PERIODIC_ENABLE
2212 3393
2213inline_speed void 3394noinline
3395static void
2214periodic_recalc (EV_P_ ev_periodic *w) 3396periodic_recalc (EV_P_ ev_periodic *w)
2215{ 3397{
2216 /* TODO: use slow but potentially more correct incremental algo, */ 3398 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2217 /* also do not rely on ceil */ 3399 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2218 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3400
3401 /* the above almost always errs on the low side */
3402 while (at <= ev_rt_now)
3403 {
3404 ev_tstamp nat = at + w->interval;
3405
3406 /* when resolution fails us, we use ev_rt_now */
3407 if (expect_false (nat == at))
3408 {
3409 at = ev_rt_now;
3410 break;
3411 }
3412
3413 at = nat;
3414 }
3415
3416 ev_at (w) = at;
2219} 3417}
2220 3418
2221/* make periodics pending */ 3419/* make periodics pending */
2222inline_size void 3420inline_size void
2223periodics_reify (EV_P) 3421periodics_reify (EV_P)
2224{ 3422{
2225 EV_FREQUENT_CHECK; 3423 EV_FREQUENT_CHECK;
2226 3424
2227 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3425 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2228 { 3426 {
2229 int feed_count = 0;
2230
2231 do 3427 do
2232 { 3428 {
2233 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3429 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2234 3430
2235 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3431 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2245 downheap (periodics, periodiccnt, HEAP0); 3441 downheap (periodics, periodiccnt, HEAP0);
2246 } 3442 }
2247 else if (w->interval) 3443 else if (w->interval)
2248 { 3444 {
2249 periodic_recalc (EV_A_ w); 3445 periodic_recalc (EV_A_ w);
2250
2251 /* if next trigger time is not sufficiently in the future, put it there */
2252 /* this might happen because of floating point inexactness */
2253 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2254 {
2255 ev_at (w) += w->interval;
2256
2257 /* if interval is unreasonably low we might still have a time in the past */
2258 /* so correct this. this will make the periodic very inexact, but the user */
2259 /* has effectively asked to get triggered more often than possible */
2260 if (ev_at (w) < ev_rt_now)
2261 ev_at (w) = ev_rt_now;
2262 }
2263
2264 ANHE_at_cache (periodics [HEAP0]); 3446 ANHE_at_cache (periodics [HEAP0]);
2265 downheap (periodics, periodiccnt, HEAP0); 3447 downheap (periodics, periodiccnt, HEAP0);
2266 } 3448 }
2267 else 3449 else
2268 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3450 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2276 } 3458 }
2277} 3459}
2278 3460
2279/* simply recalculate all periodics */ 3461/* simply recalculate all periodics */
2280/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3462/* TODO: maybe ensure that at least one event happens when jumping forward? */
2281static void noinline 3463noinline ecb_cold
3464static void
2282periodics_reschedule (EV_P) 3465periodics_reschedule (EV_P)
2283{ 3466{
2284 int i; 3467 int i;
2285 3468
2286 /* adjust periodics after time jump */ 3469 /* adjust periodics after time jump */
… …
2299 reheap (periodics, periodiccnt); 3482 reheap (periodics, periodiccnt);
2300} 3483}
2301#endif 3484#endif
2302 3485
2303/* adjust all timers by a given offset */ 3486/* adjust all timers by a given offset */
2304static void noinline 3487noinline ecb_cold
3488static void
2305timers_reschedule (EV_P_ ev_tstamp adjust) 3489timers_reschedule (EV_P_ ev_tstamp adjust)
2306{ 3490{
2307 int i; 3491 int i;
2308 3492
2309 for (i = 0; i < timercnt; ++i) 3493 for (i = 0; i < timercnt; ++i)
… …
2346 * doesn't hurt either as we only do this on time-jumps or 3530 * doesn't hurt either as we only do this on time-jumps or
2347 * in the unlikely event of having been preempted here. 3531 * in the unlikely event of having been preempted here.
2348 */ 3532 */
2349 for (i = 4; --i; ) 3533 for (i = 4; --i; )
2350 { 3534 {
3535 ev_tstamp diff;
2351 rtmn_diff = ev_rt_now - mn_now; 3536 rtmn_diff = ev_rt_now - mn_now;
2352 3537
3538 diff = odiff - rtmn_diff;
3539
2353 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3540 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2354 return; /* all is well */ 3541 return; /* all is well */
2355 3542
2356 ev_rt_now = ev_time (); 3543 ev_rt_now = ev_time ();
2357 mn_now = get_clock (); 3544 mn_now = get_clock ();
2358 now_floor = mn_now; 3545 now_floor = mn_now;
… …
2380 3567
2381 mn_now = ev_rt_now; 3568 mn_now = ev_rt_now;
2382 } 3569 }
2383} 3570}
2384 3571
2385void 3572int
2386ev_run (EV_P_ int flags) 3573ev_run (EV_P_ int flags)
2387{ 3574{
2388#if EV_FEATURE_API 3575#if EV_FEATURE_API
2389 ++loop_depth; 3576 ++loop_depth;
2390#endif 3577#endif
… …
2448 ev_tstamp prev_mn_now = mn_now; 3635 ev_tstamp prev_mn_now = mn_now;
2449 3636
2450 /* update time to cancel out callback processing overhead */ 3637 /* update time to cancel out callback processing overhead */
2451 time_update (EV_A_ 1e100); 3638 time_update (EV_A_ 1e100);
2452 3639
3640 /* from now on, we want a pipe-wake-up */
3641 pipe_write_wanted = 1;
3642
3643 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3644
2453 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3645 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2454 { 3646 {
2455 waittime = MAX_BLOCKTIME; 3647 waittime = MAX_BLOCKTIME;
2456 3648
2457 if (timercnt) 3649 if (timercnt)
2458 { 3650 {
2459 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3651 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2460 if (waittime > to) waittime = to; 3652 if (waittime > to) waittime = to;
2461 } 3653 }
2462 3654
2463#if EV_PERIODIC_ENABLE 3655#if EV_PERIODIC_ENABLE
2464 if (periodiccnt) 3656 if (periodiccnt)
2465 { 3657 {
2466 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3658 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2467 if (waittime > to) waittime = to; 3659 if (waittime > to) waittime = to;
2468 } 3660 }
2469#endif 3661#endif
2470 3662
2471 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3663 /* don't let timeouts decrease the waittime below timeout_blocktime */
2472 if (expect_false (waittime < timeout_blocktime)) 3664 if (expect_false (waittime < timeout_blocktime))
2473 waittime = timeout_blocktime; 3665 waittime = timeout_blocktime;
3666
3667 /* at this point, we NEED to wait, so we have to ensure */
3668 /* to pass a minimum nonzero value to the backend */
3669 if (expect_false (waittime < backend_mintime))
3670 waittime = backend_mintime;
2474 3671
2475 /* extra check because io_blocktime is commonly 0 */ 3672 /* extra check because io_blocktime is commonly 0 */
2476 if (expect_false (io_blocktime)) 3673 if (expect_false (io_blocktime))
2477 { 3674 {
2478 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3675 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2479 3676
2480 if (sleeptime > waittime - backend_fudge) 3677 if (sleeptime > waittime - backend_mintime)
2481 sleeptime = waittime - backend_fudge; 3678 sleeptime = waittime - backend_mintime;
2482 3679
2483 if (expect_true (sleeptime > 0.)) 3680 if (expect_true (sleeptime > 0.))
2484 { 3681 {
2485 ev_sleep (sleeptime); 3682 ev_sleep (sleeptime);
2486 waittime -= sleeptime; 3683 waittime -= sleeptime;
… …
2493#endif 3690#endif
2494 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3691 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2495 backend_poll (EV_A_ waittime); 3692 backend_poll (EV_A_ waittime);
2496 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3693 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2497 3694
3695 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3696
3697 ECB_MEMORY_FENCE_ACQUIRE;
3698 if (pipe_write_skipped)
3699 {
3700 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3701 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3702 }
3703
3704
2498 /* update ev_rt_now, do magic */ 3705 /* update ev_rt_now, do magic */
2499 time_update (EV_A_ waittime + sleeptime); 3706 time_update (EV_A_ waittime + sleeptime);
2500 } 3707 }
2501 3708
2502 /* queue pending timers and reschedule them */ 3709 /* queue pending timers and reschedule them */
… …
2528 loop_done = EVBREAK_CANCEL; 3735 loop_done = EVBREAK_CANCEL;
2529 3736
2530#if EV_FEATURE_API 3737#if EV_FEATURE_API
2531 --loop_depth; 3738 --loop_depth;
2532#endif 3739#endif
2533}
2534 3740
3741 return activecnt;
3742}
3743
2535void 3744void
2536ev_break (EV_P_ int how) 3745ev_break (EV_P_ int how) EV_NOEXCEPT
2537{ 3746{
2538 loop_done = how; 3747 loop_done = how;
2539} 3748}
2540 3749
2541void 3750void
2542ev_ref (EV_P) 3751ev_ref (EV_P) EV_NOEXCEPT
2543{ 3752{
2544 ++activecnt; 3753 ++activecnt;
2545} 3754}
2546 3755
2547void 3756void
2548ev_unref (EV_P) 3757ev_unref (EV_P) EV_NOEXCEPT
2549{ 3758{
2550 --activecnt; 3759 --activecnt;
2551} 3760}
2552 3761
2553void 3762void
2554ev_now_update (EV_P) 3763ev_now_update (EV_P) EV_NOEXCEPT
2555{ 3764{
2556 time_update (EV_A_ 1e100); 3765 time_update (EV_A_ 1e100);
2557} 3766}
2558 3767
2559void 3768void
2560ev_suspend (EV_P) 3769ev_suspend (EV_P) EV_NOEXCEPT
2561{ 3770{
2562 ev_now_update (EV_A); 3771 ev_now_update (EV_A);
2563} 3772}
2564 3773
2565void 3774void
2566ev_resume (EV_P) 3775ev_resume (EV_P) EV_NOEXCEPT
2567{ 3776{
2568 ev_tstamp mn_prev = mn_now; 3777 ev_tstamp mn_prev = mn_now;
2569 3778
2570 ev_now_update (EV_A); 3779 ev_now_update (EV_A);
2571 timers_reschedule (EV_A_ mn_now - mn_prev); 3780 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2610 w->pending = 0; 3819 w->pending = 0;
2611 } 3820 }
2612} 3821}
2613 3822
2614int 3823int
2615ev_clear_pending (EV_P_ void *w) 3824ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2616{ 3825{
2617 W w_ = (W)w; 3826 W w_ = (W)w;
2618 int pending = w_->pending; 3827 int pending = w_->pending;
2619 3828
2620 if (expect_true (pending)) 3829 if (expect_true (pending))
… …
2652 w->active = 0; 3861 w->active = 0;
2653} 3862}
2654 3863
2655/*****************************************************************************/ 3864/*****************************************************************************/
2656 3865
2657void noinline 3866noinline
3867void
2658ev_io_start (EV_P_ ev_io *w) 3868ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2659{ 3869{
2660 int fd = w->fd; 3870 int fd = w->fd;
2661 3871
2662 if (expect_false (ev_is_active (w))) 3872 if (expect_false (ev_is_active (w)))
2663 return; 3873 return;
… …
2669 3879
2670 ev_start (EV_A_ (W)w, 1); 3880 ev_start (EV_A_ (W)w, 1);
2671 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3881 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2672 wlist_add (&anfds[fd].head, (WL)w); 3882 wlist_add (&anfds[fd].head, (WL)w);
2673 3883
3884 /* common bug, apparently */
3885 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3886
2674 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3887 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2675 w->events &= ~EV__IOFDSET; 3888 w->events &= ~EV__IOFDSET;
2676 3889
2677 EV_FREQUENT_CHECK; 3890 EV_FREQUENT_CHECK;
2678} 3891}
2679 3892
2680void noinline 3893noinline
3894void
2681ev_io_stop (EV_P_ ev_io *w) 3895ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2682{ 3896{
2683 clear_pending (EV_A_ (W)w); 3897 clear_pending (EV_A_ (W)w);
2684 if (expect_false (!ev_is_active (w))) 3898 if (expect_false (!ev_is_active (w)))
2685 return; 3899 return;
2686 3900
… …
2694 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3908 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2695 3909
2696 EV_FREQUENT_CHECK; 3910 EV_FREQUENT_CHECK;
2697} 3911}
2698 3912
2699void noinline 3913noinline
3914void
2700ev_timer_start (EV_P_ ev_timer *w) 3915ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2701{ 3916{
2702 if (expect_false (ev_is_active (w))) 3917 if (expect_false (ev_is_active (w)))
2703 return; 3918 return;
2704 3919
2705 ev_at (w) += mn_now; 3920 ev_at (w) += mn_now;
… …
2718 EV_FREQUENT_CHECK; 3933 EV_FREQUENT_CHECK;
2719 3934
2720 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3935 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2721} 3936}
2722 3937
2723void noinline 3938noinline
3939void
2724ev_timer_stop (EV_P_ ev_timer *w) 3940ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2725{ 3941{
2726 clear_pending (EV_A_ (W)w); 3942 clear_pending (EV_A_ (W)w);
2727 if (expect_false (!ev_is_active (w))) 3943 if (expect_false (!ev_is_active (w)))
2728 return; 3944 return;
2729 3945
… …
2748 ev_stop (EV_A_ (W)w); 3964 ev_stop (EV_A_ (W)w);
2749 3965
2750 EV_FREQUENT_CHECK; 3966 EV_FREQUENT_CHECK;
2751} 3967}
2752 3968
2753void noinline 3969noinline
3970void
2754ev_timer_again (EV_P_ ev_timer *w) 3971ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2755{ 3972{
2756 EV_FREQUENT_CHECK; 3973 EV_FREQUENT_CHECK;
3974
3975 clear_pending (EV_A_ (W)w);
2757 3976
2758 if (ev_is_active (w)) 3977 if (ev_is_active (w))
2759 { 3978 {
2760 if (w->repeat) 3979 if (w->repeat)
2761 { 3980 {
… …
2774 3993
2775 EV_FREQUENT_CHECK; 3994 EV_FREQUENT_CHECK;
2776} 3995}
2777 3996
2778ev_tstamp 3997ev_tstamp
2779ev_timer_remaining (EV_P_ ev_timer *w) 3998ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2780{ 3999{
2781 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4000 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2782} 4001}
2783 4002
2784#if EV_PERIODIC_ENABLE 4003#if EV_PERIODIC_ENABLE
2785void noinline 4004noinline
4005void
2786ev_periodic_start (EV_P_ ev_periodic *w) 4006ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2787{ 4007{
2788 if (expect_false (ev_is_active (w))) 4008 if (expect_false (ev_is_active (w)))
2789 return; 4009 return;
2790 4010
2791 if (w->reschedule_cb) 4011 if (w->reschedule_cb)
… …
2810 EV_FREQUENT_CHECK; 4030 EV_FREQUENT_CHECK;
2811 4031
2812 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4032 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2813} 4033}
2814 4034
2815void noinline 4035noinline
4036void
2816ev_periodic_stop (EV_P_ ev_periodic *w) 4037ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2817{ 4038{
2818 clear_pending (EV_A_ (W)w); 4039 clear_pending (EV_A_ (W)w);
2819 if (expect_false (!ev_is_active (w))) 4040 if (expect_false (!ev_is_active (w)))
2820 return; 4041 return;
2821 4042
… …
2838 ev_stop (EV_A_ (W)w); 4059 ev_stop (EV_A_ (W)w);
2839 4060
2840 EV_FREQUENT_CHECK; 4061 EV_FREQUENT_CHECK;
2841} 4062}
2842 4063
2843void noinline 4064noinline
4065void
2844ev_periodic_again (EV_P_ ev_periodic *w) 4066ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2845{ 4067{
2846 /* TODO: use adjustheap and recalculation */ 4068 /* TODO: use adjustheap and recalculation */
2847 ev_periodic_stop (EV_A_ w); 4069 ev_periodic_stop (EV_A_ w);
2848 ev_periodic_start (EV_A_ w); 4070 ev_periodic_start (EV_A_ w);
2849} 4071}
… …
2853# define SA_RESTART 0 4075# define SA_RESTART 0
2854#endif 4076#endif
2855 4077
2856#if EV_SIGNAL_ENABLE 4078#if EV_SIGNAL_ENABLE
2857 4079
2858void noinline 4080noinline
4081void
2859ev_signal_start (EV_P_ ev_signal *w) 4082ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2860{ 4083{
2861 if (expect_false (ev_is_active (w))) 4084 if (expect_false (ev_is_active (w)))
2862 return; 4085 return;
2863 4086
2864 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4087 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2866#if EV_MULTIPLICITY 4089#if EV_MULTIPLICITY
2867 assert (("libev: a signal must not be attached to two different loops", 4090 assert (("libev: a signal must not be attached to two different loops",
2868 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4091 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2869 4092
2870 signals [w->signum - 1].loop = EV_A; 4093 signals [w->signum - 1].loop = EV_A;
4094 ECB_MEMORY_FENCE_RELEASE;
2871#endif 4095#endif
2872 4096
2873 EV_FREQUENT_CHECK; 4097 EV_FREQUENT_CHECK;
2874 4098
2875#if EV_USE_SIGNALFD 4099#if EV_USE_SIGNALFD
… …
2934 } 4158 }
2935 4159
2936 EV_FREQUENT_CHECK; 4160 EV_FREQUENT_CHECK;
2937} 4161}
2938 4162
2939void noinline 4163noinline
4164void
2940ev_signal_stop (EV_P_ ev_signal *w) 4165ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2941{ 4166{
2942 clear_pending (EV_A_ (W)w); 4167 clear_pending (EV_A_ (W)w);
2943 if (expect_false (!ev_is_active (w))) 4168 if (expect_false (!ev_is_active (w)))
2944 return; 4169 return;
2945 4170
… …
2976#endif 4201#endif
2977 4202
2978#if EV_CHILD_ENABLE 4203#if EV_CHILD_ENABLE
2979 4204
2980void 4205void
2981ev_child_start (EV_P_ ev_child *w) 4206ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2982{ 4207{
2983#if EV_MULTIPLICITY 4208#if EV_MULTIPLICITY
2984 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4209 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2985#endif 4210#endif
2986 if (expect_false (ev_is_active (w))) 4211 if (expect_false (ev_is_active (w)))
… …
2993 4218
2994 EV_FREQUENT_CHECK; 4219 EV_FREQUENT_CHECK;
2995} 4220}
2996 4221
2997void 4222void
2998ev_child_stop (EV_P_ ev_child *w) 4223ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2999{ 4224{
3000 clear_pending (EV_A_ (W)w); 4225 clear_pending (EV_A_ (W)w);
3001 if (expect_false (!ev_is_active (w))) 4226 if (expect_false (!ev_is_active (w)))
3002 return; 4227 return;
3003 4228
… …
3020 4245
3021#define DEF_STAT_INTERVAL 5.0074891 4246#define DEF_STAT_INTERVAL 5.0074891
3022#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4247#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3023#define MIN_STAT_INTERVAL 0.1074891 4248#define MIN_STAT_INTERVAL 0.1074891
3024 4249
3025static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4250noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3026 4251
3027#if EV_USE_INOTIFY 4252#if EV_USE_INOTIFY
3028 4253
3029/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4254/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3030# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4255# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3031 4256
3032static void noinline 4257noinline
4258static void
3033infy_add (EV_P_ ev_stat *w) 4259infy_add (EV_P_ ev_stat *w)
3034{ 4260{
3035 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); 4261 w->wd = inotify_add_watch (fs_fd, w->path,
4262 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4263 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4264 | IN_DONT_FOLLOW | IN_MASK_ADD);
3036 4265
3037 if (w->wd >= 0) 4266 if (w->wd >= 0)
3038 { 4267 {
3039 struct statfs sfs; 4268 struct statfs sfs;
3040 4269
… …
3044 4273
3045 if (!fs_2625) 4274 if (!fs_2625)
3046 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4275 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3047 else if (!statfs (w->path, &sfs) 4276 else if (!statfs (w->path, &sfs)
3048 && (sfs.f_type == 0x1373 /* devfs */ 4277 && (sfs.f_type == 0x1373 /* devfs */
4278 || sfs.f_type == 0x4006 /* fat */
4279 || sfs.f_type == 0x4d44 /* msdos */
3049 || sfs.f_type == 0xEF53 /* ext2/3 */ 4280 || sfs.f_type == 0xEF53 /* ext2/3 */
4281 || sfs.f_type == 0x72b6 /* jffs2 */
4282 || sfs.f_type == 0x858458f6 /* ramfs */
4283 || sfs.f_type == 0x5346544e /* ntfs */
3050 || sfs.f_type == 0x3153464a /* jfs */ 4284 || sfs.f_type == 0x3153464a /* jfs */
4285 || sfs.f_type == 0x9123683e /* btrfs */
3051 || sfs.f_type == 0x52654973 /* reiser3 */ 4286 || sfs.f_type == 0x52654973 /* reiser3 */
3052 || sfs.f_type == 0x01021994 /* tempfs */ 4287 || sfs.f_type == 0x01021994 /* tmpfs */
3053 || sfs.f_type == 0x58465342 /* xfs */)) 4288 || sfs.f_type == 0x58465342 /* xfs */))
3054 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4289 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3055 else 4290 else
3056 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4291 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3057 } 4292 }
… …
3078 if (!pend || pend == path) 4313 if (!pend || pend == path)
3079 break; 4314 break;
3080 4315
3081 *pend = 0; 4316 *pend = 0;
3082 w->wd = inotify_add_watch (fs_fd, path, mask); 4317 w->wd = inotify_add_watch (fs_fd, path, mask);
3083 } 4318 }
3084 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4319 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3085 } 4320 }
3086 } 4321 }
3087 4322
3088 if (w->wd >= 0) 4323 if (w->wd >= 0)
… …
3092 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4327 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3093 ev_timer_again (EV_A_ &w->timer); 4328 ev_timer_again (EV_A_ &w->timer);
3094 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4329 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3095} 4330}
3096 4331
3097static void noinline 4332noinline
4333static void
3098infy_del (EV_P_ ev_stat *w) 4334infy_del (EV_P_ ev_stat *w)
3099{ 4335{
3100 int slot; 4336 int slot;
3101 int wd = w->wd; 4337 int wd = w->wd;
3102 4338
… …
3109 4345
3110 /* remove this watcher, if others are watching it, they will rearm */ 4346 /* remove this watcher, if others are watching it, they will rearm */
3111 inotify_rm_watch (fs_fd, wd); 4347 inotify_rm_watch (fs_fd, wd);
3112} 4348}
3113 4349
3114static void noinline 4350noinline
4351static void
3115infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4352infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3116{ 4353{
3117 if (slot < 0) 4354 if (slot < 0)
3118 /* overflow, need to check for all hash slots */ 4355 /* overflow, need to check for all hash slots */
3119 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4356 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3155 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4392 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3156 ofs += sizeof (struct inotify_event) + ev->len; 4393 ofs += sizeof (struct inotify_event) + ev->len;
3157 } 4394 }
3158} 4395}
3159 4396
3160inline_size void 4397inline_size ecb_cold
4398void
3161ev_check_2625 (EV_P) 4399ev_check_2625 (EV_P)
3162{ 4400{
3163 /* kernels < 2.6.25 are borked 4401 /* kernels < 2.6.25 are borked
3164 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4402 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3165 */ 4403 */
… …
3170} 4408}
3171 4409
3172inline_size int 4410inline_size int
3173infy_newfd (void) 4411infy_newfd (void)
3174{ 4412{
3175#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4413#if defined IN_CLOEXEC && defined IN_NONBLOCK
3176 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4414 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3177 if (fd >= 0) 4415 if (fd >= 0)
3178 return fd; 4416 return fd;
3179#endif 4417#endif
3180 return inotify_init (); 4418 return inotify_init ();
… …
3255#else 4493#else
3256# define EV_LSTAT(p,b) lstat (p, b) 4494# define EV_LSTAT(p,b) lstat (p, b)
3257#endif 4495#endif
3258 4496
3259void 4497void
3260ev_stat_stat (EV_P_ ev_stat *w) 4498ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3261{ 4499{
3262 if (lstat (w->path, &w->attr) < 0) 4500 if (lstat (w->path, &w->attr) < 0)
3263 w->attr.st_nlink = 0; 4501 w->attr.st_nlink = 0;
3264 else if (!w->attr.st_nlink) 4502 else if (!w->attr.st_nlink)
3265 w->attr.st_nlink = 1; 4503 w->attr.st_nlink = 1;
3266} 4504}
3267 4505
3268static void noinline 4506noinline
4507static void
3269stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4508stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3270{ 4509{
3271 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4510 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3272 4511
3273 ev_statdata prev = w->attr; 4512 ev_statdata prev = w->attr;
… …
3304 ev_feed_event (EV_A_ w, EV_STAT); 4543 ev_feed_event (EV_A_ w, EV_STAT);
3305 } 4544 }
3306} 4545}
3307 4546
3308void 4547void
3309ev_stat_start (EV_P_ ev_stat *w) 4548ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3310{ 4549{
3311 if (expect_false (ev_is_active (w))) 4550 if (expect_false (ev_is_active (w)))
3312 return; 4551 return;
3313 4552
3314 ev_stat_stat (EV_A_ w); 4553 ev_stat_stat (EV_A_ w);
… …
3335 4574
3336 EV_FREQUENT_CHECK; 4575 EV_FREQUENT_CHECK;
3337} 4576}
3338 4577
3339void 4578void
3340ev_stat_stop (EV_P_ ev_stat *w) 4579ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3341{ 4580{
3342 clear_pending (EV_A_ (W)w); 4581 clear_pending (EV_A_ (W)w);
3343 if (expect_false (!ev_is_active (w))) 4582 if (expect_false (!ev_is_active (w)))
3344 return; 4583 return;
3345 4584
… …
3361} 4600}
3362#endif 4601#endif
3363 4602
3364#if EV_IDLE_ENABLE 4603#if EV_IDLE_ENABLE
3365void 4604void
3366ev_idle_start (EV_P_ ev_idle *w) 4605ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3367{ 4606{
3368 if (expect_false (ev_is_active (w))) 4607 if (expect_false (ev_is_active (w)))
3369 return; 4608 return;
3370 4609
3371 pri_adjust (EV_A_ (W)w); 4610 pri_adjust (EV_A_ (W)w);
… …
3384 4623
3385 EV_FREQUENT_CHECK; 4624 EV_FREQUENT_CHECK;
3386} 4625}
3387 4626
3388void 4627void
3389ev_idle_stop (EV_P_ ev_idle *w) 4628ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3390{ 4629{
3391 clear_pending (EV_A_ (W)w); 4630 clear_pending (EV_A_ (W)w);
3392 if (expect_false (!ev_is_active (w))) 4631 if (expect_false (!ev_is_active (w)))
3393 return; 4632 return;
3394 4633
… …
3408} 4647}
3409#endif 4648#endif
3410 4649
3411#if EV_PREPARE_ENABLE 4650#if EV_PREPARE_ENABLE
3412void 4651void
3413ev_prepare_start (EV_P_ ev_prepare *w) 4652ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3414{ 4653{
3415 if (expect_false (ev_is_active (w))) 4654 if (expect_false (ev_is_active (w)))
3416 return; 4655 return;
3417 4656
3418 EV_FREQUENT_CHECK; 4657 EV_FREQUENT_CHECK;
… …
3423 4662
3424 EV_FREQUENT_CHECK; 4663 EV_FREQUENT_CHECK;
3425} 4664}
3426 4665
3427void 4666void
3428ev_prepare_stop (EV_P_ ev_prepare *w) 4667ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3429{ 4668{
3430 clear_pending (EV_A_ (W)w); 4669 clear_pending (EV_A_ (W)w);
3431 if (expect_false (!ev_is_active (w))) 4670 if (expect_false (!ev_is_active (w)))
3432 return; 4671 return;
3433 4672
… …
3446} 4685}
3447#endif 4686#endif
3448 4687
3449#if EV_CHECK_ENABLE 4688#if EV_CHECK_ENABLE
3450void 4689void
3451ev_check_start (EV_P_ ev_check *w) 4690ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3452{ 4691{
3453 if (expect_false (ev_is_active (w))) 4692 if (expect_false (ev_is_active (w)))
3454 return; 4693 return;
3455 4694
3456 EV_FREQUENT_CHECK; 4695 EV_FREQUENT_CHECK;
… …
3461 4700
3462 EV_FREQUENT_CHECK; 4701 EV_FREQUENT_CHECK;
3463} 4702}
3464 4703
3465void 4704void
3466ev_check_stop (EV_P_ ev_check *w) 4705ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3467{ 4706{
3468 clear_pending (EV_A_ (W)w); 4707 clear_pending (EV_A_ (W)w);
3469 if (expect_false (!ev_is_active (w))) 4708 if (expect_false (!ev_is_active (w)))
3470 return; 4709 return;
3471 4710
… …
3483 EV_FREQUENT_CHECK; 4722 EV_FREQUENT_CHECK;
3484} 4723}
3485#endif 4724#endif
3486 4725
3487#if EV_EMBED_ENABLE 4726#if EV_EMBED_ENABLE
3488void noinline 4727noinline
4728void
3489ev_embed_sweep (EV_P_ ev_embed *w) 4729ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3490{ 4730{
3491 ev_run (w->other, EVRUN_NOWAIT); 4731 ev_run (w->other, EVRUN_NOWAIT);
3492} 4732}
3493 4733
3494static void 4734static void
… …
3542 ev_idle_stop (EV_A_ idle); 4782 ev_idle_stop (EV_A_ idle);
3543} 4783}
3544#endif 4784#endif
3545 4785
3546void 4786void
3547ev_embed_start (EV_P_ ev_embed *w) 4787ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3548{ 4788{
3549 if (expect_false (ev_is_active (w))) 4789 if (expect_false (ev_is_active (w)))
3550 return; 4790 return;
3551 4791
3552 { 4792 {
… …
3573 4813
3574 EV_FREQUENT_CHECK; 4814 EV_FREQUENT_CHECK;
3575} 4815}
3576 4816
3577void 4817void
3578ev_embed_stop (EV_P_ ev_embed *w) 4818ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3579{ 4819{
3580 clear_pending (EV_A_ (W)w); 4820 clear_pending (EV_A_ (W)w);
3581 if (expect_false (!ev_is_active (w))) 4821 if (expect_false (!ev_is_active (w)))
3582 return; 4822 return;
3583 4823
… …
3593} 4833}
3594#endif 4834#endif
3595 4835
3596#if EV_FORK_ENABLE 4836#if EV_FORK_ENABLE
3597void 4837void
3598ev_fork_start (EV_P_ ev_fork *w) 4838ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3599{ 4839{
3600 if (expect_false (ev_is_active (w))) 4840 if (expect_false (ev_is_active (w)))
3601 return; 4841 return;
3602 4842
3603 EV_FREQUENT_CHECK; 4843 EV_FREQUENT_CHECK;
… …
3608 4848
3609 EV_FREQUENT_CHECK; 4849 EV_FREQUENT_CHECK;
3610} 4850}
3611 4851
3612void 4852void
3613ev_fork_stop (EV_P_ ev_fork *w) 4853ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3614{ 4854{
3615 clear_pending (EV_A_ (W)w); 4855 clear_pending (EV_A_ (W)w);
3616 if (expect_false (!ev_is_active (w))) 4856 if (expect_false (!ev_is_active (w)))
3617 return; 4857 return;
3618 4858
… …
3631} 4871}
3632#endif 4872#endif
3633 4873
3634#if EV_CLEANUP_ENABLE 4874#if EV_CLEANUP_ENABLE
3635void 4875void
3636ev_cleanup_start (EV_P_ ev_cleanup *w) 4876ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3637{ 4877{
3638 if (expect_false (ev_is_active (w))) 4878 if (expect_false (ev_is_active (w)))
3639 return; 4879 return;
3640 4880
3641 EV_FREQUENT_CHECK; 4881 EV_FREQUENT_CHECK;
… …
3648 ev_unref (EV_A); 4888 ev_unref (EV_A);
3649 EV_FREQUENT_CHECK; 4889 EV_FREQUENT_CHECK;
3650} 4890}
3651 4891
3652void 4892void
3653ev_cleanup_stop (EV_P_ ev_cleanup *w) 4893ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3654{ 4894{
3655 clear_pending (EV_A_ (W)w); 4895 clear_pending (EV_A_ (W)w);
3656 if (expect_false (!ev_is_active (w))) 4896 if (expect_false (!ev_is_active (w)))
3657 return; 4897 return;
3658 4898
… …
3672} 4912}
3673#endif 4913#endif
3674 4914
3675#if EV_ASYNC_ENABLE 4915#if EV_ASYNC_ENABLE
3676void 4916void
3677ev_async_start (EV_P_ ev_async *w) 4917ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3678{ 4918{
3679 if (expect_false (ev_is_active (w))) 4919 if (expect_false (ev_is_active (w)))
3680 return; 4920 return;
3681 4921
3682 w->sent = 0; 4922 w->sent = 0;
… …
3691 4931
3692 EV_FREQUENT_CHECK; 4932 EV_FREQUENT_CHECK;
3693} 4933}
3694 4934
3695void 4935void
3696ev_async_stop (EV_P_ ev_async *w) 4936ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3697{ 4937{
3698 clear_pending (EV_A_ (W)w); 4938 clear_pending (EV_A_ (W)w);
3699 if (expect_false (!ev_is_active (w))) 4939 if (expect_false (!ev_is_active (w)))
3700 return; 4940 return;
3701 4941
… …
3712 4952
3713 EV_FREQUENT_CHECK; 4953 EV_FREQUENT_CHECK;
3714} 4954}
3715 4955
3716void 4956void
3717ev_async_send (EV_P_ ev_async *w) 4957ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3718{ 4958{
3719 w->sent = 1; 4959 w->sent = 1;
3720 evpipe_write (EV_A_ &async_pending); 4960 evpipe_write (EV_A_ &async_pending);
3721} 4961}
3722#endif 4962#endif
… …
3759 4999
3760 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5000 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3761} 5001}
3762 5002
3763void 5003void
3764ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5004ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3765{ 5005{
3766 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5006 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3767 5007
3768 if (expect_false (!once)) 5008 if (expect_false (!once))
3769 { 5009 {
… …
3790} 5030}
3791 5031
3792/*****************************************************************************/ 5032/*****************************************************************************/
3793 5033
3794#if EV_WALK_ENABLE 5034#if EV_WALK_ENABLE
5035ecb_cold
3795void 5036void
3796ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5037ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3797{ 5038{
3798 int i, j; 5039 int i, j;
3799 ev_watcher_list *wl, *wn; 5040 ev_watcher_list *wl, *wn;
3800 5041
3801 if (types & (EV_IO | EV_EMBED)) 5042 if (types & (EV_IO | EV_EMBED))
… …
3844 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5085 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3845#endif 5086#endif
3846 5087
3847#if EV_IDLE_ENABLE 5088#if EV_IDLE_ENABLE
3848 if (types & EV_IDLE) 5089 if (types & EV_IDLE)
3849 for (j = NUMPRI; i--; ) 5090 for (j = NUMPRI; j--; )
3850 for (i = idlecnt [j]; i--; ) 5091 for (i = idlecnt [j]; i--; )
3851 cb (EV_A_ EV_IDLE, idles [j][i]); 5092 cb (EV_A_ EV_IDLE, idles [j][i]);
3852#endif 5093#endif
3853 5094
3854#if EV_FORK_ENABLE 5095#if EV_FORK_ENABLE
… …
3907 5148
3908#if EV_MULTIPLICITY 5149#if EV_MULTIPLICITY
3909 #include "ev_wrap.h" 5150 #include "ev_wrap.h"
3910#endif 5151#endif
3911 5152
3912EV_CPP(})
3913

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