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Comparing libev/ev.c (file contents):
Revision 1.368 by root, Mon Jan 17 12:11:11 2011 UTC vs.
Revision 1.487 by root, Mon Oct 29 00:00:21 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
… …
376# undef EV_USE_INOTIFY 413# undef EV_USE_INOTIFY
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# ifndef _WIN32 418/* hp-ux has it in sys/time.h, which we unconditionally include above */
419# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 420# include <sys/select.h>
383# endif 421# endif
384#endif 422#endif
385 423
386#if EV_USE_INOTIFY 424#if EV_USE_INOTIFY
… …
389/* 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 */
390# ifndef IN_DONT_FOLLOW 428# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY 429# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0 430# define EV_USE_INOTIFY 0
393# endif 431# endif
394#endif
395
396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif 432#endif
399 433
400#if EV_USE_EVENTFD 434#if EV_USE_EVENTFD
401/* 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 */
402# include <stdint.h> 436# include <stdint.h>
… …
442#else 476#else
443# define EV_FREQUENT_CHECK do { } while (0) 477# define EV_FREQUENT_CHECK do { } while (0)
444#endif 478#endif
445 479
446/* 480/*
447 * This is used to avoid floating point rounding problems. 481 * This is used to work around floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000. 482 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */ 483 */
454#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 */
455 486
456#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) */
457#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) */
458 489
459#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)
460#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)
461 492
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;
462#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
615#if ECB_CPP
616 #define ECB_C 0
617 #define ECB_STDC_VERSION 0
618#else
619 #define ECB_C 1
620 #define ECB_STDC_VERSION __STDC_VERSION__
621#endif
622
623#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
624#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
625
626#if ECB_CPP
627 #define ECB_EXTERN_C extern "C"
628 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
629 #define ECB_EXTERN_C_END }
630#else
631 #define ECB_EXTERN_C extern
632 #define ECB_EXTERN_C_BEG
633 #define ECB_EXTERN_C_END
634#endif
635
636/*****************************************************************************/
637
638/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
639/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
640
641#if ECB_NO_THREADS
642 #define ECB_NO_SMP 1
643#endif
644
645#if ECB_NO_SMP
646 #define ECB_MEMORY_FENCE do { } while (0)
647#endif
648
649/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
650#if __xlC__ && ECB_CPP
651 #include <builtins.h>
652#endif
653
654#if 1400 <= _MSC_VER
655 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
656#endif
657
658#ifndef ECB_MEMORY_FENCE
659 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
660 #if __i386 || __i386__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
662 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
663 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
664 #elif ECB_GCC_AMD64
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
666 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
667 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
668 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
669 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
670 #elif defined __ARM_ARCH_2__ \
671 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
672 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
673 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
674 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
675 || defined __ARM_ARCH_5TEJ__
676 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
677 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
678 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
679 || defined __ARM_ARCH_6T2__
680 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
681 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
682 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
684 #elif __aarch64__
685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
686 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
687 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
688 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
689 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
690 #elif defined __s390__ || defined __s390x__
691 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
692 #elif defined __mips__
693 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
694 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
695 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
696 #elif defined __alpha__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
698 #elif defined __hppa__
699 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
700 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
701 #elif defined __ia64__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
703 #elif defined __m68k__
704 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
705 #elif defined __m88k__
706 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
707 #elif defined __sh__
708 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
709 #endif
710 #endif
711#endif
712
713#ifndef ECB_MEMORY_FENCE
714 #if ECB_GCC_VERSION(4,7)
715 /* see comment below (stdatomic.h) about the C11 memory model. */
716 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
717 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
718 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
719
720 #elif ECB_CLANG_EXTENSION(c_atomic)
721 /* see comment below (stdatomic.h) about the C11 memory model. */
722 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
723 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
724 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
725
726 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
727 #define ECB_MEMORY_FENCE __sync_synchronize ()
728 #elif _MSC_VER >= 1500 /* VC++ 2008 */
729 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
730 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
731 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
732 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
733 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
734 #elif _MSC_VER >= 1400 /* VC++ 2005 */
735 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
736 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
737 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
738 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
739 #elif defined _WIN32
740 #include <WinNT.h>
741 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
742 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
743 #include <mbarrier.h>
744 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
745 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
746 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
747 #elif __xlC__
748 #define ECB_MEMORY_FENCE __sync ()
749 #endif
750#endif
751
752#ifndef ECB_MEMORY_FENCE
753 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
754 /* we assume that these memory fences work on all variables/all memory accesses, */
755 /* not just C11 atomics and atomic accesses */
756 #include <stdatomic.h>
757 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
758 /* any fence other than seq_cst, which isn't very efficient for us. */
759 /* Why that is, we don't know - either the C11 memory model is quite useless */
760 /* for most usages, or gcc and clang have a bug */
761 /* I *currently* lean towards the latter, and inefficiently implement */
762 /* all three of ecb's fences as a seq_cst fence */
763 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
764 /* for all __atomic_thread_fence's except seq_cst */
765 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
766 #endif
767#endif
768
769#ifndef ECB_MEMORY_FENCE
770 #if !ECB_AVOID_PTHREADS
771 /*
772 * if you get undefined symbol references to pthread_mutex_lock,
773 * or failure to find pthread.h, then you should implement
774 * the ECB_MEMORY_FENCE operations for your cpu/compiler
775 * OR provide pthread.h and link against the posix thread library
776 * of your system.
777 */
778 #include <pthread.h>
779 #define ECB_NEEDS_PTHREADS 1
780 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
781
782 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
783 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
784 #endif
785#endif
786
787#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
788 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
789#endif
790
791#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
792 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
793#endif
794
795/*****************************************************************************/
796
797#if ECB_CPP
798 #define ecb_inline static inline
799#elif ECB_GCC_VERSION(2,5)
800 #define ecb_inline static __inline__
801#elif ECB_C99
802 #define ecb_inline static inline
803#else
804 #define ecb_inline static
805#endif
806
807#if ECB_GCC_VERSION(3,3)
808 #define ecb_restrict __restrict__
809#elif ECB_C99
810 #define ecb_restrict restrict
811#else
812 #define ecb_restrict
813#endif
814
815typedef int ecb_bool;
816
817#define ECB_CONCAT_(a, b) a ## b
818#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
819#define ECB_STRINGIFY_(a) # a
820#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
821#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
822
823#define ecb_function_ ecb_inline
824
825#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
826 #define ecb_attribute(attrlist) __attribute__ (attrlist)
827#else
828 #define ecb_attribute(attrlist)
829#endif
830
831#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
832 #define ecb_is_constant(expr) __builtin_constant_p (expr)
833#else
834 /* possible C11 impl for integral types
835 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
836 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
837
838 #define ecb_is_constant(expr) 0
839#endif
840
841#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
463# define expect(expr,value) __builtin_expect ((expr),(value)) 842 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
464# define noinline __attribute__ ((noinline))
465#else 843#else
466# define expect(expr,value) (expr) 844 #define ecb_expect(expr,value) (expr)
467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif 845#endif
471#endif
472 846
847#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
848 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
849#else
850 #define ecb_prefetch(addr,rw,locality)
851#endif
852
853/* no emulation for ecb_decltype */
854#if ECB_CPP11
855 // older implementations might have problems with decltype(x)::type, work around it
856 template<class T> struct ecb_decltype_t { typedef T type; };
857 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
858#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
859 #define ecb_decltype(x) __typeof__ (x)
860#endif
861
862#if _MSC_VER >= 1300
863 #define ecb_deprecated __declspec (deprecated)
864#else
865 #define ecb_deprecated ecb_attribute ((__deprecated__))
866#endif
867
868#if _MSC_VER >= 1500
869 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
870#elif ECB_GCC_VERSION(4,5)
871 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
872#else
873 #define ecb_deprecated_message(msg) ecb_deprecated
874#endif
875
876#if _MSC_VER >= 1400
877 #define ecb_noinline __declspec (noinline)
878#else
879 #define ecb_noinline ecb_attribute ((__noinline__))
880#endif
881
882#define ecb_unused ecb_attribute ((__unused__))
883#define ecb_const ecb_attribute ((__const__))
884#define ecb_pure ecb_attribute ((__pure__))
885
886#if ECB_C11 || __IBMC_NORETURN
887 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
888 #define ecb_noreturn _Noreturn
889#elif ECB_CPP11
890 #define ecb_noreturn [[noreturn]]
891#elif _MSC_VER >= 1200
892 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
893 #define ecb_noreturn __declspec (noreturn)
894#else
895 #define ecb_noreturn ecb_attribute ((__noreturn__))
896#endif
897
898#if ECB_GCC_VERSION(4,3)
899 #define ecb_artificial ecb_attribute ((__artificial__))
900 #define ecb_hot ecb_attribute ((__hot__))
901 #define ecb_cold ecb_attribute ((__cold__))
902#else
903 #define ecb_artificial
904 #define ecb_hot
905 #define ecb_cold
906#endif
907
908/* put around conditional expressions if you are very sure that the */
909/* expression is mostly true or mostly false. note that these return */
910/* booleans, not the expression. */
473#define expect_false(expr) expect ((expr) != 0, 0) 911#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474#define expect_true(expr) expect ((expr) != 0, 1) 912#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
913/* for compatibility to the rest of the world */
914#define ecb_likely(expr) ecb_expect_true (expr)
915#define ecb_unlikely(expr) ecb_expect_false (expr)
916
917/* count trailing zero bits and count # of one bits */
918#if ECB_GCC_VERSION(3,4) \
919 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
920 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
921 && ECB_CLANG_BUILTIN(__builtin_popcount))
922 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
923 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
924 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
925 #define ecb_ctz32(x) __builtin_ctz (x)
926 #define ecb_ctz64(x) __builtin_ctzll (x)
927 #define ecb_popcount32(x) __builtin_popcount (x)
928 /* no popcountll */
929#else
930 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
931 ecb_function_ ecb_const int
932 ecb_ctz32 (uint32_t x)
933 {
934#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
935 unsigned long r;
936 _BitScanForward (&r, x);
937 return (int)r;
938#else
939 int r = 0;
940
941 x &= ~x + 1; /* this isolates the lowest bit */
942
943#if ECB_branchless_on_i386
944 r += !!(x & 0xaaaaaaaa) << 0;
945 r += !!(x & 0xcccccccc) << 1;
946 r += !!(x & 0xf0f0f0f0) << 2;
947 r += !!(x & 0xff00ff00) << 3;
948 r += !!(x & 0xffff0000) << 4;
949#else
950 if (x & 0xaaaaaaaa) r += 1;
951 if (x & 0xcccccccc) r += 2;
952 if (x & 0xf0f0f0f0) r += 4;
953 if (x & 0xff00ff00) r += 8;
954 if (x & 0xffff0000) r += 16;
955#endif
956
957 return r;
958#endif
959 }
960
961 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
962 ecb_function_ ecb_const int
963 ecb_ctz64 (uint64_t x)
964 {
965#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
966 unsigned long r;
967 _BitScanForward64 (&r, x);
968 return (int)r;
969#else
970 int shift = x & 0xffffffff ? 0 : 32;
971 return ecb_ctz32 (x >> shift) + shift;
972#endif
973 }
974
975 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
976 ecb_function_ ecb_const int
977 ecb_popcount32 (uint32_t x)
978 {
979 x -= (x >> 1) & 0x55555555;
980 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
981 x = ((x >> 4) + x) & 0x0f0f0f0f;
982 x *= 0x01010101;
983
984 return x >> 24;
985 }
986
987 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
988 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
989 {
990#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
991 unsigned long r;
992 _BitScanReverse (&r, x);
993 return (int)r;
994#else
995 int r = 0;
996
997 if (x >> 16) { x >>= 16; r += 16; }
998 if (x >> 8) { x >>= 8; r += 8; }
999 if (x >> 4) { x >>= 4; r += 4; }
1000 if (x >> 2) { x >>= 2; r += 2; }
1001 if (x >> 1) { r += 1; }
1002
1003 return r;
1004#endif
1005 }
1006
1007 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1008 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1009 {
1010#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1011 unsigned long r;
1012 _BitScanReverse64 (&r, x);
1013 return (int)r;
1014#else
1015 int r = 0;
1016
1017 if (x >> 32) { x >>= 32; r += 32; }
1018
1019 return r + ecb_ld32 (x);
1020#endif
1021 }
1022#endif
1023
1024ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1025ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1026ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1027ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1028
1029ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1030ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1031{
1032 return ( (x * 0x0802U & 0x22110U)
1033 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1034}
1035
1036ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1037ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1038{
1039 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1040 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1041 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1042 x = ( x >> 8 ) | ( x << 8);
1043
1044 return x;
1045}
1046
1047ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1048ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1049{
1050 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1051 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1052 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1053 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1054 x = ( x >> 16 ) | ( x << 16);
1055
1056 return x;
1057}
1058
1059/* popcount64 is only available on 64 bit cpus as gcc builtin */
1060/* so for this version we are lazy */
1061ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1062ecb_function_ ecb_const int
1063ecb_popcount64 (uint64_t x)
1064{
1065 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1066}
1067
1068ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1069ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1070ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1071ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1072ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1073ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1074ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1075ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1076
1077ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1078ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1079ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1080ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1081ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1082ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1083ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1084ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1085
1086#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1087 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1088 #define ecb_bswap16(x) __builtin_bswap16 (x)
1089 #else
1090 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1091 #endif
1092 #define ecb_bswap32(x) __builtin_bswap32 (x)
1093 #define ecb_bswap64(x) __builtin_bswap64 (x)
1094#elif _MSC_VER
1095 #include <stdlib.h>
1096 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1097 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1098 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1099#else
1100 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1101 ecb_function_ ecb_const uint16_t
1102 ecb_bswap16 (uint16_t x)
1103 {
1104 return ecb_rotl16 (x, 8);
1105 }
1106
1107 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1108 ecb_function_ ecb_const uint32_t
1109 ecb_bswap32 (uint32_t x)
1110 {
1111 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1112 }
1113
1114 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1115 ecb_function_ ecb_const uint64_t
1116 ecb_bswap64 (uint64_t x)
1117 {
1118 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1119 }
1120#endif
1121
1122#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1123 #define ecb_unreachable() __builtin_unreachable ()
1124#else
1125 /* this seems to work fine, but gcc always emits a warning for it :/ */
1126 ecb_inline ecb_noreturn void ecb_unreachable (void);
1127 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1128#endif
1129
1130/* try to tell the compiler that some condition is definitely true */
1131#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1132
1133ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1134ecb_inline ecb_const uint32_t
1135ecb_byteorder_helper (void)
1136{
1137 /* the union code still generates code under pressure in gcc, */
1138 /* but less than using pointers, and always seems to */
1139 /* successfully return a constant. */
1140 /* the reason why we have this horrible preprocessor mess */
1141 /* is to avoid it in all cases, at least on common architectures */
1142 /* or when using a recent enough gcc version (>= 4.6) */
1143#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1144 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1145 #define ECB_LITTLE_ENDIAN 1
1146 return 0x44332211;
1147#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1148 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1149 #define ECB_BIG_ENDIAN 1
1150 return 0x11223344;
1151#else
1152 union
1153 {
1154 uint8_t c[4];
1155 uint32_t u;
1156 } u = { 0x11, 0x22, 0x33, 0x44 };
1157 return u.u;
1158#endif
1159}
1160
1161ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1162ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1163ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1164ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1165
1166#if ECB_GCC_VERSION(3,0) || ECB_C99
1167 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1168#else
1169 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1170#endif
1171
1172#if ECB_CPP
1173 template<typename T>
1174 static inline T ecb_div_rd (T val, T div)
1175 {
1176 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1177 }
1178 template<typename T>
1179 static inline T ecb_div_ru (T val, T div)
1180 {
1181 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1182 }
1183#else
1184 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1185 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1186#endif
1187
1188#if ecb_cplusplus_does_not_suck
1189 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1190 template<typename T, int N>
1191 static inline int ecb_array_length (const T (&arr)[N])
1192 {
1193 return N;
1194 }
1195#else
1196 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1197#endif
1198
1199ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1200ecb_function_ ecb_const uint32_t
1201ecb_binary16_to_binary32 (uint32_t x)
1202{
1203 unsigned int s = (x & 0x8000) << (31 - 15);
1204 int e = (x >> 10) & 0x001f;
1205 unsigned int m = x & 0x03ff;
1206
1207 if (ecb_expect_false (e == 31))
1208 /* infinity or NaN */
1209 e = 255 - (127 - 15);
1210 else if (ecb_expect_false (!e))
1211 {
1212 if (ecb_expect_true (!m))
1213 /* zero, handled by code below by forcing e to 0 */
1214 e = 0 - (127 - 15);
1215 else
1216 {
1217 /* subnormal, renormalise */
1218 unsigned int s = 10 - ecb_ld32 (m);
1219
1220 m = (m << s) & 0x3ff; /* mask implicit bit */
1221 e -= s - 1;
1222 }
1223 }
1224
1225 /* e and m now are normalised, or zero, (or inf or nan) */
1226 e += 127 - 15;
1227
1228 return s | (e << 23) | (m << (23 - 10));
1229}
1230
1231ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1232ecb_function_ ecb_const uint16_t
1233ecb_binary32_to_binary16 (uint32_t x)
1234{
1235 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1236 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1237 unsigned int m = x & 0x007fffff;
1238
1239 x &= 0x7fffffff;
1240
1241 /* if it's within range of binary16 normals, use fast path */
1242 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1243 {
1244 /* mantissa round-to-even */
1245 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1246
1247 /* handle overflow */
1248 if (ecb_expect_false (m >= 0x00800000))
1249 {
1250 m >>= 1;
1251 e += 1;
1252 }
1253
1254 return s | (e << 10) | (m >> (23 - 10));
1255 }
1256
1257 /* handle large numbers and infinity */
1258 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1259 return s | 0x7c00;
1260
1261 /* handle zero, subnormals and small numbers */
1262 if (ecb_expect_true (x < 0x38800000))
1263 {
1264 /* zero */
1265 if (ecb_expect_true (!x))
1266 return s;
1267
1268 /* handle subnormals */
1269
1270 /* too small, will be zero */
1271 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1272 return s;
1273
1274 m |= 0x00800000; /* make implicit bit explicit */
1275
1276 /* very tricky - we need to round to the nearest e (+10) bit value */
1277 {
1278 unsigned int bits = 14 - e;
1279 unsigned int half = (1 << (bits - 1)) - 1;
1280 unsigned int even = (m >> bits) & 1;
1281
1282 /* if this overflows, we will end up with a normalised number */
1283 m = (m + half + even) >> bits;
1284 }
1285
1286 return s | m;
1287 }
1288
1289 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1290 m >>= 13;
1291
1292 return s | 0x7c00 | m | !m;
1293}
1294
1295/*******************************************************************************/
1296/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1297
1298/* basically, everything uses "ieee pure-endian" floating point numbers */
1299/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1300#if 0 \
1301 || __i386 || __i386__ \
1302 || ECB_GCC_AMD64 \
1303 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1304 || defined __s390__ || defined __s390x__ \
1305 || defined __mips__ \
1306 || defined __alpha__ \
1307 || defined __hppa__ \
1308 || defined __ia64__ \
1309 || defined __m68k__ \
1310 || defined __m88k__ \
1311 || defined __sh__ \
1312 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1313 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1314 || defined __aarch64__
1315 #define ECB_STDFP 1
1316 #include <string.h> /* for memcpy */
1317#else
1318 #define ECB_STDFP 0
1319#endif
1320
1321#ifndef ECB_NO_LIBM
1322
1323 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1324
1325 /* only the oldest of old doesn't have this one. solaris. */
1326 #ifdef INFINITY
1327 #define ECB_INFINITY INFINITY
1328 #else
1329 #define ECB_INFINITY HUGE_VAL
1330 #endif
1331
1332 #ifdef NAN
1333 #define ECB_NAN NAN
1334 #else
1335 #define ECB_NAN ECB_INFINITY
1336 #endif
1337
1338 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1339 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1340 #define ecb_frexpf(x,e) frexpf ((x), (e))
1341 #else
1342 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1343 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1344 #endif
1345
1346 /* convert a float to ieee single/binary32 */
1347 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1348 ecb_function_ ecb_const uint32_t
1349 ecb_float_to_binary32 (float x)
1350 {
1351 uint32_t r;
1352
1353 #if ECB_STDFP
1354 memcpy (&r, &x, 4);
1355 #else
1356 /* slow emulation, works for anything but -0 */
1357 uint32_t m;
1358 int e;
1359
1360 if (x == 0e0f ) return 0x00000000U;
1361 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1362 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1363 if (x != x ) return 0x7fbfffffU;
1364
1365 m = ecb_frexpf (x, &e) * 0x1000000U;
1366
1367 r = m & 0x80000000U;
1368
1369 if (r)
1370 m = -m;
1371
1372 if (e <= -126)
1373 {
1374 m &= 0xffffffU;
1375 m >>= (-125 - e);
1376 e = -126;
1377 }
1378
1379 r |= (e + 126) << 23;
1380 r |= m & 0x7fffffU;
1381 #endif
1382
1383 return r;
1384 }
1385
1386 /* converts an ieee single/binary32 to a float */
1387 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1388 ecb_function_ ecb_const float
1389 ecb_binary32_to_float (uint32_t x)
1390 {
1391 float r;
1392
1393 #if ECB_STDFP
1394 memcpy (&r, &x, 4);
1395 #else
1396 /* emulation, only works for normals and subnormals and +0 */
1397 int neg = x >> 31;
1398 int e = (x >> 23) & 0xffU;
1399
1400 x &= 0x7fffffU;
1401
1402 if (e)
1403 x |= 0x800000U;
1404 else
1405 e = 1;
1406
1407 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1408 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1409
1410 r = neg ? -r : r;
1411 #endif
1412
1413 return r;
1414 }
1415
1416 /* convert a double to ieee double/binary64 */
1417 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1418 ecb_function_ ecb_const uint64_t
1419 ecb_double_to_binary64 (double x)
1420 {
1421 uint64_t r;
1422
1423 #if ECB_STDFP
1424 memcpy (&r, &x, 8);
1425 #else
1426 /* slow emulation, works for anything but -0 */
1427 uint64_t m;
1428 int e;
1429
1430 if (x == 0e0 ) return 0x0000000000000000U;
1431 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1432 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1433 if (x != x ) return 0X7ff7ffffffffffffU;
1434
1435 m = frexp (x, &e) * 0x20000000000000U;
1436
1437 r = m & 0x8000000000000000;;
1438
1439 if (r)
1440 m = -m;
1441
1442 if (e <= -1022)
1443 {
1444 m &= 0x1fffffffffffffU;
1445 m >>= (-1021 - e);
1446 e = -1022;
1447 }
1448
1449 r |= ((uint64_t)(e + 1022)) << 52;
1450 r |= m & 0xfffffffffffffU;
1451 #endif
1452
1453 return r;
1454 }
1455
1456 /* converts an ieee double/binary64 to a double */
1457 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1458 ecb_function_ ecb_const double
1459 ecb_binary64_to_double (uint64_t x)
1460 {
1461 double r;
1462
1463 #if ECB_STDFP
1464 memcpy (&r, &x, 8);
1465 #else
1466 /* emulation, only works for normals and subnormals and +0 */
1467 int neg = x >> 63;
1468 int e = (x >> 52) & 0x7ffU;
1469
1470 x &= 0xfffffffffffffU;
1471
1472 if (e)
1473 x |= 0x10000000000000U;
1474 else
1475 e = 1;
1476
1477 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1478 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1479
1480 r = neg ? -r : r;
1481 #endif
1482
1483 return r;
1484 }
1485
1486 /* convert a float to ieee half/binary16 */
1487 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1488 ecb_function_ ecb_const uint16_t
1489 ecb_float_to_binary16 (float x)
1490 {
1491 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1492 }
1493
1494 /* convert an ieee half/binary16 to float */
1495 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1496 ecb_function_ ecb_const float
1497 ecb_binary16_to_float (uint16_t x)
1498 {
1499 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1500 }
1501
1502#endif
1503
1504#endif
1505
1506/* ECB.H END */
1507
1508#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1509/* if your architecture doesn't need memory fences, e.g. because it is
1510 * single-cpu/core, or if you use libev in a project that doesn't use libev
1511 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1512 * libev, in which cases the memory fences become nops.
1513 * alternatively, you can remove this #error and link against libpthread,
1514 * which will then provide the memory fences.
1515 */
1516# error "memory fences not defined for your architecture, please report"
1517#endif
1518
1519#ifndef ECB_MEMORY_FENCE
1520# define ECB_MEMORY_FENCE do { } while (0)
1521# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1522# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1523#endif
1524
1525#define expect_false(cond) ecb_expect_false (cond)
1526#define expect_true(cond) ecb_expect_true (cond)
1527#define noinline ecb_noinline
1528
475#define inline_size static inline 1529#define inline_size ecb_inline
476 1530
477#if EV_FEATURE_CODE 1531#if EV_FEATURE_CODE
478# define inline_speed static inline 1532# define inline_speed ecb_inline
479#else 1533#else
480# define inline_speed static noinline 1534# define inline_speed noinline static
481#endif 1535#endif
482 1536
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1537#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
484 1538
485#if EV_MINPRI == EV_MAXPRI 1539#if EV_MINPRI == EV_MAXPRI
… …
522# include "ev_win32.c" 1576# include "ev_win32.c"
523#endif 1577#endif
524 1578
525/*****************************************************************************/ 1579/*****************************************************************************/
526 1580
1581/* define a suitable floor function (only used by periodics atm) */
1582
1583#if EV_USE_FLOOR
1584# include <math.h>
1585# define ev_floor(v) floor (v)
1586#else
1587
1588#include <float.h>
1589
1590/* a floor() replacement function, should be independent of ev_tstamp type */
1591noinline
1592static ev_tstamp
1593ev_floor (ev_tstamp v)
1594{
1595 /* the choice of shift factor is not terribly important */
1596#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1597 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1598#else
1599 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1600#endif
1601
1602 /* argument too large for an unsigned long? */
1603 if (expect_false (v >= shift))
1604 {
1605 ev_tstamp f;
1606
1607 if (v == v - 1.)
1608 return v; /* very large number */
1609
1610 f = shift * ev_floor (v * (1. / shift));
1611 return f + ev_floor (v - f);
1612 }
1613
1614 /* special treatment for negative args? */
1615 if (expect_false (v < 0.))
1616 {
1617 ev_tstamp f = -ev_floor (-v);
1618
1619 return f - (f == v ? 0 : 1);
1620 }
1621
1622 /* fits into an unsigned long */
1623 return (unsigned long)v;
1624}
1625
1626#endif
1627
1628/*****************************************************************************/
1629
527#ifdef __linux 1630#ifdef __linux
528# include <sys/utsname.h> 1631# include <sys/utsname.h>
529#endif 1632#endif
530 1633
1634noinline ecb_cold
531static unsigned int noinline 1635static unsigned int
532ev_linux_version (void) 1636ev_linux_version (void)
533{ 1637{
534#ifdef __linux 1638#ifdef __linux
535 unsigned int v = 0; 1639 unsigned int v = 0;
536 struct utsname buf; 1640 struct utsname buf;
… …
565} 1669}
566 1670
567/*****************************************************************************/ 1671/*****************************************************************************/
568 1672
569#if EV_AVOID_STDIO 1673#if EV_AVOID_STDIO
570static void noinline 1674noinline ecb_cold
1675static void
571ev_printerr (const char *msg) 1676ev_printerr (const char *msg)
572{ 1677{
573 write (STDERR_FILENO, msg, strlen (msg)); 1678 write (STDERR_FILENO, msg, strlen (msg));
574} 1679}
575#endif 1680#endif
576 1681
577static void (*syserr_cb)(const char *msg); 1682static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
578 1683
1684ecb_cold
579void 1685void
580ev_set_syserr_cb (void (*cb)(const char *msg)) 1686ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
581{ 1687{
582 syserr_cb = cb; 1688 syserr_cb = cb;
583} 1689}
584 1690
585static void noinline 1691noinline ecb_cold
1692static void
586ev_syserr (const char *msg) 1693ev_syserr (const char *msg)
587{ 1694{
588 if (!msg) 1695 if (!msg)
589 msg = "(libev) system error"; 1696 msg = "(libev) system error";
590 1697
… …
603 abort (); 1710 abort ();
604 } 1711 }
605} 1712}
606 1713
607static void * 1714static void *
608ev_realloc_emul (void *ptr, long size) 1715ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
609{ 1716{
610#if __GLIBC__
611 return realloc (ptr, size);
612#else
613 /* some systems, notably openbsd and darwin, fail to properly 1717 /* some systems, notably openbsd and darwin, fail to properly
614 * implement realloc (x, 0) (as required by both ansi c-89 and 1718 * implement realloc (x, 0) (as required by both ansi c-89 and
615 * the single unix specification, so work around them here. 1719 * the single unix specification, so work around them here.
1720 * recently, also (at least) fedora and debian started breaking it,
1721 * despite documenting it otherwise.
616 */ 1722 */
617 1723
618 if (size) 1724 if (size)
619 return realloc (ptr, size); 1725 return realloc (ptr, size);
620 1726
621 free (ptr); 1727 free (ptr);
622 return 0; 1728 return 0;
623#endif
624} 1729}
625 1730
626static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1731static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
627 1732
1733ecb_cold
628void 1734void
629ev_set_allocator (void *(*cb)(void *ptr, long size)) 1735ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
630{ 1736{
631 alloc = cb; 1737 alloc = cb;
632} 1738}
633 1739
634inline_speed void * 1740inline_speed void *
… …
722 #undef VAR 1828 #undef VAR
723 }; 1829 };
724 #include "ev_wrap.h" 1830 #include "ev_wrap.h"
725 1831
726 static struct ev_loop default_loop_struct; 1832 static struct ev_loop default_loop_struct;
727 struct ev_loop *ev_default_loop_ptr; 1833 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
728 1834
729#else 1835#else
730 1836
731 ev_tstamp ev_rt_now; 1837 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
732 #define VAR(name,decl) static decl; 1838 #define VAR(name,decl) static decl;
733 #include "ev_vars.h" 1839 #include "ev_vars.h"
734 #undef VAR 1840 #undef VAR
735 1841
736 static int ev_default_loop_ptr; 1842 static int ev_default_loop_ptr;
… …
751 1857
752/*****************************************************************************/ 1858/*****************************************************************************/
753 1859
754#ifndef EV_HAVE_EV_TIME 1860#ifndef EV_HAVE_EV_TIME
755ev_tstamp 1861ev_tstamp
756ev_time (void) 1862ev_time (void) EV_NOEXCEPT
757{ 1863{
758#if EV_USE_REALTIME 1864#if EV_USE_REALTIME
759 if (expect_true (have_realtime)) 1865 if (expect_true (have_realtime))
760 { 1866 {
761 struct timespec ts; 1867 struct timespec ts;
… …
785 return ev_time (); 1891 return ev_time ();
786} 1892}
787 1893
788#if EV_MULTIPLICITY 1894#if EV_MULTIPLICITY
789ev_tstamp 1895ev_tstamp
790ev_now (EV_P) 1896ev_now (EV_P) EV_NOEXCEPT
791{ 1897{
792 return ev_rt_now; 1898 return ev_rt_now;
793} 1899}
794#endif 1900#endif
795 1901
796void 1902void
797ev_sleep (ev_tstamp delay) 1903ev_sleep (ev_tstamp delay) EV_NOEXCEPT
798{ 1904{
799 if (delay > 0.) 1905 if (delay > 0.)
800 { 1906 {
801#if EV_USE_NANOSLEEP 1907#if EV_USE_NANOSLEEP
802 struct timespec ts; 1908 struct timespec ts;
803 1909
804 EV_TS_SET (ts, delay); 1910 EV_TS_SET (ts, delay);
805 nanosleep (&ts, 0); 1911 nanosleep (&ts, 0);
806#elif defined(_WIN32) 1912#elif defined _WIN32
1913 /* maybe this should round up, as ms is very low resolution */
1914 /* compared to select (µs) or nanosleep (ns) */
807 Sleep ((unsigned long)(delay * 1e3)); 1915 Sleep ((unsigned long)(delay * 1e3));
808#else 1916#else
809 struct timeval tv; 1917 struct timeval tv;
810 1918
811 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1919 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
815 select (0, 0, 0, 0, &tv); 1923 select (0, 0, 0, 0, &tv);
816#endif 1924#endif
817 } 1925 }
818} 1926}
819 1927
820inline_speed int
821ev_timeout_to_ms (ev_tstamp timeout)
822{
823 int ms = timeout * 1000. + .999999;
824
825 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
826}
827
828/*****************************************************************************/ 1928/*****************************************************************************/
829 1929
830#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1930#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
831 1931
832/* find a suitable new size for the given array, */ 1932/* find a suitable new size for the given array, */
… …
838 1938
839 do 1939 do
840 ncur <<= 1; 1940 ncur <<= 1;
841 while (cnt > ncur); 1941 while (cnt > ncur);
842 1942
843 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1943 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
844 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1944 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
845 { 1945 {
846 ncur *= elem; 1946 ncur *= elem;
847 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1947 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
848 ncur = ncur - sizeof (void *) * 4; 1948 ncur = ncur - sizeof (void *) * 4;
… …
850 } 1950 }
851 1951
852 return ncur; 1952 return ncur;
853} 1953}
854 1954
855static noinline void * 1955noinline ecb_cold
1956static void *
856array_realloc (int elem, void *base, int *cur, int cnt) 1957array_realloc (int elem, void *base, int *cur, int cnt)
857{ 1958{
858 *cur = array_nextsize (elem, *cur, cnt); 1959 *cur = array_nextsize (elem, *cur, cnt);
859 return ev_realloc (base, elem * *cur); 1960 return ev_realloc (base, elem * *cur);
860} 1961}
… …
863 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1964 memset ((void *)(base), 0, sizeof (*(base)) * (count))
864 1965
865#define array_needsize(type,base,cur,cnt,init) \ 1966#define array_needsize(type,base,cur,cnt,init) \
866 if (expect_false ((cnt) > (cur))) \ 1967 if (expect_false ((cnt) > (cur))) \
867 { \ 1968 { \
868 int ocur_ = (cur); \ 1969 ecb_unused int ocur_ = (cur); \
869 (base) = (type *)array_realloc \ 1970 (base) = (type *)array_realloc \
870 (sizeof (type), (base), &(cur), (cnt)); \ 1971 (sizeof (type), (base), &(cur), (cnt)); \
871 init ((base) + (ocur_), (cur) - ocur_); \ 1972 init ((base) + (ocur_), (cur) - ocur_); \
872 } 1973 }
873 1974
… …
885 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 1986 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
886 1987
887/*****************************************************************************/ 1988/*****************************************************************************/
888 1989
889/* dummy callback for pending events */ 1990/* dummy callback for pending events */
890static void noinline 1991noinline
1992static void
891pendingcb (EV_P_ ev_prepare *w, int revents) 1993pendingcb (EV_P_ ev_prepare *w, int revents)
892{ 1994{
893} 1995}
894 1996
895void noinline 1997noinline
1998void
896ev_feed_event (EV_P_ void *w, int revents) 1999ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
897{ 2000{
898 W w_ = (W)w; 2001 W w_ = (W)w;
899 int pri = ABSPRI (w_); 2002 int pri = ABSPRI (w_);
900 2003
901 if (expect_false (w_->pending)) 2004 if (expect_false (w_->pending))
… …
905 w_->pending = ++pendingcnt [pri]; 2008 w_->pending = ++pendingcnt [pri];
906 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2009 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
907 pendings [pri][w_->pending - 1].w = w_; 2010 pendings [pri][w_->pending - 1].w = w_;
908 pendings [pri][w_->pending - 1].events = revents; 2011 pendings [pri][w_->pending - 1].events = revents;
909 } 2012 }
2013
2014 pendingpri = NUMPRI - 1;
910} 2015}
911 2016
912inline_speed void 2017inline_speed void
913feed_reverse (EV_P_ W w) 2018feed_reverse (EV_P_ W w)
914{ 2019{
… …
960 if (expect_true (!anfd->reify)) 2065 if (expect_true (!anfd->reify))
961 fd_event_nocheck (EV_A_ fd, revents); 2066 fd_event_nocheck (EV_A_ fd, revents);
962} 2067}
963 2068
964void 2069void
965ev_feed_fd_event (EV_P_ int fd, int revents) 2070ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
966{ 2071{
967 if (fd >= 0 && fd < anfdmax) 2072 if (fd >= 0 && fd < anfdmax)
968 fd_event_nocheck (EV_A_ fd, revents); 2073 fd_event_nocheck (EV_A_ fd, revents);
969} 2074}
970 2075
… …
973inline_size void 2078inline_size void
974fd_reify (EV_P) 2079fd_reify (EV_P)
975{ 2080{
976 int i; 2081 int i;
977 2082
2083#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2084 for (i = 0; i < fdchangecnt; ++i)
2085 {
2086 int fd = fdchanges [i];
2087 ANFD *anfd = anfds + fd;
2088
2089 if (anfd->reify & EV__IOFDSET && anfd->head)
2090 {
2091 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2092
2093 if (handle != anfd->handle)
2094 {
2095 unsigned long arg;
2096
2097 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2098
2099 /* handle changed, but fd didn't - we need to do it in two steps */
2100 backend_modify (EV_A_ fd, anfd->events, 0);
2101 anfd->events = 0;
2102 anfd->handle = handle;
2103 }
2104 }
2105 }
2106#endif
2107
978 for (i = 0; i < fdchangecnt; ++i) 2108 for (i = 0; i < fdchangecnt; ++i)
979 { 2109 {
980 int fd = fdchanges [i]; 2110 int fd = fdchanges [i];
981 ANFD *anfd = anfds + fd; 2111 ANFD *anfd = anfds + fd;
982 ev_io *w; 2112 ev_io *w;
… …
984 unsigned char o_events = anfd->events; 2114 unsigned char o_events = anfd->events;
985 unsigned char o_reify = anfd->reify; 2115 unsigned char o_reify = anfd->reify;
986 2116
987 anfd->reify = 0; 2117 anfd->reify = 0;
988 2118
989#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
990 if (o_reify & EV__IOFDSET)
991 {
992 unsigned long arg;
993 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
994 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
995 printf ("oi %d %x\n", fd, anfd->handle);//D
996 }
997#endif
998
999 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2119 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1000 { 2120 {
1001 anfd->events = 0; 2121 anfd->events = 0;
1002 2122
1003 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2123 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1013 2133
1014 fdchangecnt = 0; 2134 fdchangecnt = 0;
1015} 2135}
1016 2136
1017/* something about the given fd changed */ 2137/* something about the given fd changed */
1018inline_size void 2138inline_size
2139void
1019fd_change (EV_P_ int fd, int flags) 2140fd_change (EV_P_ int fd, int flags)
1020{ 2141{
1021 unsigned char reify = anfds [fd].reify; 2142 unsigned char reify = anfds [fd].reify;
1022 anfds [fd].reify |= flags; 2143 anfds [fd].reify |= flags;
1023 2144
… …
1028 fdchanges [fdchangecnt - 1] = fd; 2149 fdchanges [fdchangecnt - 1] = fd;
1029 } 2150 }
1030} 2151}
1031 2152
1032/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2153/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1033inline_speed void 2154inline_speed ecb_cold void
1034fd_kill (EV_P_ int fd) 2155fd_kill (EV_P_ int fd)
1035{ 2156{
1036 ev_io *w; 2157 ev_io *w;
1037 2158
1038 while ((w = (ev_io *)anfds [fd].head)) 2159 while ((w = (ev_io *)anfds [fd].head))
… …
1041 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2162 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1042 } 2163 }
1043} 2164}
1044 2165
1045/* check whether the given fd is actually valid, for error recovery */ 2166/* check whether the given fd is actually valid, for error recovery */
1046inline_size int 2167inline_size ecb_cold int
1047fd_valid (int fd) 2168fd_valid (int fd)
1048{ 2169{
1049#ifdef _WIN32 2170#ifdef _WIN32
1050 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2171 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1051#else 2172#else
1052 return fcntl (fd, F_GETFD) != -1; 2173 return fcntl (fd, F_GETFD) != -1;
1053#endif 2174#endif
1054} 2175}
1055 2176
1056/* called on EBADF to verify fds */ 2177/* called on EBADF to verify fds */
1057static void noinline 2178noinline ecb_cold
2179static void
1058fd_ebadf (EV_P) 2180fd_ebadf (EV_P)
1059{ 2181{
1060 int fd; 2182 int fd;
1061 2183
1062 for (fd = 0; fd < anfdmax; ++fd) 2184 for (fd = 0; fd < anfdmax; ++fd)
… …
1064 if (!fd_valid (fd) && errno == EBADF) 2186 if (!fd_valid (fd) && errno == EBADF)
1065 fd_kill (EV_A_ fd); 2187 fd_kill (EV_A_ fd);
1066} 2188}
1067 2189
1068/* called on ENOMEM in select/poll to kill some fds and retry */ 2190/* called on ENOMEM in select/poll to kill some fds and retry */
1069static void noinline 2191noinline ecb_cold
2192static void
1070fd_enomem (EV_P) 2193fd_enomem (EV_P)
1071{ 2194{
1072 int fd; 2195 int fd;
1073 2196
1074 for (fd = anfdmax; fd--; ) 2197 for (fd = anfdmax; fd--; )
… …
1078 break; 2201 break;
1079 } 2202 }
1080} 2203}
1081 2204
1082/* usually called after fork if backend needs to re-arm all fds from scratch */ 2205/* usually called after fork if backend needs to re-arm all fds from scratch */
1083static void noinline 2206noinline
2207static void
1084fd_rearm_all (EV_P) 2208fd_rearm_all (EV_P)
1085{ 2209{
1086 int fd; 2210 int fd;
1087 2211
1088 for (fd = 0; fd < anfdmax; ++fd) 2212 for (fd = 0; fd < anfdmax; ++fd)
… …
1269 2393
1270/*****************************************************************************/ 2394/*****************************************************************************/
1271 2395
1272#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2396#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1273 2397
1274static void noinline 2398noinline ecb_cold
2399static void
1275evpipe_init (EV_P) 2400evpipe_init (EV_P)
1276{ 2401{
1277 if (!ev_is_active (&pipe_w)) 2402 if (!ev_is_active (&pipe_w))
1278 { 2403 {
2404 int fds [2];
2405
1279# if EV_USE_EVENTFD 2406# if EV_USE_EVENTFD
2407 fds [0] = -1;
1280 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2408 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1281 if (evfd < 0 && errno == EINVAL) 2409 if (fds [1] < 0 && errno == EINVAL)
1282 evfd = eventfd (0, 0); 2410 fds [1] = eventfd (0, 0);
1283 2411
1284 if (evfd >= 0) 2412 if (fds [1] < 0)
2413# endif
1285 { 2414 {
2415 while (pipe (fds))
2416 ev_syserr ("(libev) error creating signal/async pipe");
2417
2418 fd_intern (fds [0]);
2419 }
2420
1286 evpipe [0] = -1; 2421 evpipe [0] = fds [0];
1287 fd_intern (evfd); /* doing it twice doesn't hurt */ 2422
1288 ev_io_set (&pipe_w, evfd, EV_READ); 2423 if (evpipe [1] < 0)
2424 evpipe [1] = fds [1]; /* first call, set write fd */
2425 else
2426 {
2427 /* on subsequent calls, do not change evpipe [1] */
2428 /* so that evpipe_write can always rely on its value. */
2429 /* this branch does not do anything sensible on windows, */
2430 /* so must not be executed on windows */
2431
2432 dup2 (fds [1], evpipe [1]);
2433 close (fds [1]);
2434 }
2435
2436 fd_intern (evpipe [1]);
2437
2438 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2439 ev_io_start (EV_A_ &pipe_w);
2440 ev_unref (EV_A); /* watcher should not keep loop alive */
2441 }
2442}
2443
2444inline_speed void
2445evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2446{
2447 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2448
2449 if (expect_true (*flag))
2450 return;
2451
2452 *flag = 1;
2453 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2454
2455 pipe_write_skipped = 1;
2456
2457 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2458
2459 if (pipe_write_wanted)
2460 {
2461 int old_errno;
2462
2463 pipe_write_skipped = 0;
2464 ECB_MEMORY_FENCE_RELEASE;
2465
2466 old_errno = errno; /* save errno because write will clobber it */
2467
2468#if EV_USE_EVENTFD
2469 if (evpipe [0] < 0)
2470 {
2471 uint64_t counter = 1;
2472 write (evpipe [1], &counter, sizeof (uint64_t));
1289 } 2473 }
1290 else 2474 else
1291# endif 2475#endif
1292 { 2476 {
1293 while (pipe (evpipe)) 2477#ifdef _WIN32
1294 ev_syserr ("(libev) error creating signal/async pipe"); 2478 WSABUF buf;
1295 2479 DWORD sent;
1296 fd_intern (evpipe [0]); 2480 buf.buf = (char *)&buf;
1297 fd_intern (evpipe [1]); 2481 buf.len = 1;
1298 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2482 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2483#else
2484 write (evpipe [1], &(evpipe [1]), 1);
2485#endif
1299 } 2486 }
1300
1301 ev_io_start (EV_A_ &pipe_w);
1302 ev_unref (EV_A); /* watcher should not keep loop alive */
1303 }
1304}
1305
1306inline_size void
1307evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1308{
1309 if (!*flag)
1310 {
1311 int old_errno = errno; /* save errno because write might clobber it */
1312 char dummy;
1313
1314 *flag = 1;
1315
1316#if EV_USE_EVENTFD
1317 if (evfd >= 0)
1318 {
1319 uint64_t counter = 1;
1320 write (evfd, &counter, sizeof (uint64_t));
1321 }
1322 else
1323#endif
1324 /* win32 people keep sending patches that change this write() to send() */
1325 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1326 /* so when you think this write should be a send instead, please find out */
1327 /* where your send() is from - it's definitely not the microsoft send, and */
1328 /* tell me. thank you. */
1329 write (evpipe [1], &dummy, 1);
1330 2487
1331 errno = old_errno; 2488 errno = old_errno;
1332 } 2489 }
1333} 2490}
1334 2491
… …
1337static void 2494static void
1338pipecb (EV_P_ ev_io *iow, int revents) 2495pipecb (EV_P_ ev_io *iow, int revents)
1339{ 2496{
1340 int i; 2497 int i;
1341 2498
2499 if (revents & EV_READ)
2500 {
1342#if EV_USE_EVENTFD 2501#if EV_USE_EVENTFD
1343 if (evfd >= 0) 2502 if (evpipe [0] < 0)
1344 { 2503 {
1345 uint64_t counter; 2504 uint64_t counter;
1346 read (evfd, &counter, sizeof (uint64_t)); 2505 read (evpipe [1], &counter, sizeof (uint64_t));
1347 } 2506 }
1348 else 2507 else
1349#endif 2508#endif
1350 { 2509 {
1351 char dummy; 2510 char dummy[4];
1352 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2511#ifdef _WIN32
2512 WSABUF buf;
2513 DWORD recvd;
2514 DWORD flags = 0;
2515 buf.buf = dummy;
2516 buf.len = sizeof (dummy);
2517 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2518#else
1353 read (evpipe [0], &dummy, 1); 2519 read (evpipe [0], &dummy, sizeof (dummy));
2520#endif
2521 }
1354 } 2522 }
1355 2523
2524 pipe_write_skipped = 0;
2525
2526 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2527
2528#if EV_SIGNAL_ENABLE
1356 if (sig_pending) 2529 if (sig_pending)
1357 { 2530 {
1358 sig_pending = 0; 2531 sig_pending = 0;
2532
2533 ECB_MEMORY_FENCE;
1359 2534
1360 for (i = EV_NSIG - 1; i--; ) 2535 for (i = EV_NSIG - 1; i--; )
1361 if (expect_false (signals [i].pending)) 2536 if (expect_false (signals [i].pending))
1362 ev_feed_signal_event (EV_A_ i + 1); 2537 ev_feed_signal_event (EV_A_ i + 1);
1363 } 2538 }
2539#endif
1364 2540
1365#if EV_ASYNC_ENABLE 2541#if EV_ASYNC_ENABLE
1366 if (async_pending) 2542 if (async_pending)
1367 { 2543 {
1368 async_pending = 0; 2544 async_pending = 0;
2545
2546 ECB_MEMORY_FENCE;
1369 2547
1370 for (i = asynccnt; i--; ) 2548 for (i = asynccnt; i--; )
1371 if (asyncs [i]->sent) 2549 if (asyncs [i]->sent)
1372 { 2550 {
1373 asyncs [i]->sent = 0; 2551 asyncs [i]->sent = 0;
2552 ECB_MEMORY_FENCE_RELEASE;
1374 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2553 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1375 } 2554 }
1376 } 2555 }
1377#endif 2556#endif
1378} 2557}
1379 2558
1380/*****************************************************************************/ 2559/*****************************************************************************/
1381 2560
1382void 2561void
1383ev_feed_signal (int signum) 2562ev_feed_signal (int signum) EV_NOEXCEPT
1384{ 2563{
1385#if EV_MULTIPLICITY 2564#if EV_MULTIPLICITY
2565 EV_P;
2566 ECB_MEMORY_FENCE_ACQUIRE;
1386 EV_P = signals [signum - 1].loop; 2567 EV_A = signals [signum - 1].loop;
1387 2568
1388 if (!EV_A) 2569 if (!EV_A)
1389 return; 2570 return;
1390#endif 2571#endif
1391 2572
… …
1401#endif 2582#endif
1402 2583
1403 ev_feed_signal (signum); 2584 ev_feed_signal (signum);
1404} 2585}
1405 2586
1406void noinline 2587noinline
2588void
1407ev_feed_signal_event (EV_P_ int signum) 2589ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1408{ 2590{
1409 WL w; 2591 WL w;
1410 2592
1411 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2593 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1412 return; 2594 return;
1413 2595
1414 --signum; 2596 --signum;
1415 2597
1416#if EV_MULTIPLICITY 2598#if EV_MULTIPLICITY
… …
1420 if (expect_false (signals [signum].loop != EV_A)) 2602 if (expect_false (signals [signum].loop != EV_A))
1421 return; 2603 return;
1422#endif 2604#endif
1423 2605
1424 signals [signum].pending = 0; 2606 signals [signum].pending = 0;
2607 ECB_MEMORY_FENCE_RELEASE;
1425 2608
1426 for (w = signals [signum].head; w; w = w->next) 2609 for (w = signals [signum].head; w; w = w->next)
1427 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2610 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1428} 2611}
1429 2612
… …
1527#endif 2710#endif
1528#if EV_USE_SELECT 2711#if EV_USE_SELECT
1529# include "ev_select.c" 2712# include "ev_select.c"
1530#endif 2713#endif
1531 2714
1532int 2715ecb_cold int
1533ev_version_major (void) 2716ev_version_major (void) EV_NOEXCEPT
1534{ 2717{
1535 return EV_VERSION_MAJOR; 2718 return EV_VERSION_MAJOR;
1536} 2719}
1537 2720
1538int 2721ecb_cold int
1539ev_version_minor (void) 2722ev_version_minor (void) EV_NOEXCEPT
1540{ 2723{
1541 return EV_VERSION_MINOR; 2724 return EV_VERSION_MINOR;
1542} 2725}
1543 2726
1544/* return true if we are running with elevated privileges and should ignore env variables */ 2727/* return true if we are running with elevated privileges and should ignore env variables */
1545int inline_size 2728inline_size ecb_cold int
1546enable_secure (void) 2729enable_secure (void)
1547{ 2730{
1548#ifdef _WIN32 2731#ifdef _WIN32
1549 return 0; 2732 return 0;
1550#else 2733#else
1551 return getuid () != geteuid () 2734 return getuid () != geteuid ()
1552 || getgid () != getegid (); 2735 || getgid () != getegid ();
1553#endif 2736#endif
1554} 2737}
1555 2738
2739ecb_cold
1556unsigned int 2740unsigned int
1557ev_supported_backends (void) 2741ev_supported_backends (void) EV_NOEXCEPT
1558{ 2742{
1559 unsigned int flags = 0; 2743 unsigned int flags = 0;
1560 2744
1561 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2745 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1562 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2746 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1565 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2749 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1566 2750
1567 return flags; 2751 return flags;
1568} 2752}
1569 2753
2754ecb_cold
1570unsigned int 2755unsigned int
1571ev_recommended_backends (void) 2756ev_recommended_backends (void) EV_NOEXCEPT
1572{ 2757{
1573 unsigned int flags = ev_supported_backends (); 2758 unsigned int flags = ev_supported_backends ();
1574 2759
1575#ifndef __NetBSD__ 2760#ifndef __NetBSD__
1576 /* kqueue is borked on everything but netbsd apparently */ 2761 /* kqueue is borked on everything but netbsd apparently */
… …
1587#endif 2772#endif
1588 2773
1589 return flags; 2774 return flags;
1590} 2775}
1591 2776
2777ecb_cold
1592unsigned int 2778unsigned int
1593ev_embeddable_backends (void) 2779ev_embeddable_backends (void) EV_NOEXCEPT
1594{ 2780{
1595 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2781 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1596 2782
1597 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2783 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1598 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2784 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1600 2786
1601 return flags; 2787 return flags;
1602} 2788}
1603 2789
1604unsigned int 2790unsigned int
1605ev_backend (EV_P) 2791ev_backend (EV_P) EV_NOEXCEPT
1606{ 2792{
1607 return backend; 2793 return backend;
1608} 2794}
1609 2795
1610#if EV_FEATURE_API 2796#if EV_FEATURE_API
1611unsigned int 2797unsigned int
1612ev_iteration (EV_P) 2798ev_iteration (EV_P) EV_NOEXCEPT
1613{ 2799{
1614 return loop_count; 2800 return loop_count;
1615} 2801}
1616 2802
1617unsigned int 2803unsigned int
1618ev_depth (EV_P) 2804ev_depth (EV_P) EV_NOEXCEPT
1619{ 2805{
1620 return loop_depth; 2806 return loop_depth;
1621} 2807}
1622 2808
1623void 2809void
1624ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2810ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1625{ 2811{
1626 io_blocktime = interval; 2812 io_blocktime = interval;
1627} 2813}
1628 2814
1629void 2815void
1630ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2816ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1631{ 2817{
1632 timeout_blocktime = interval; 2818 timeout_blocktime = interval;
1633} 2819}
1634 2820
1635void 2821void
1636ev_set_userdata (EV_P_ void *data) 2822ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1637{ 2823{
1638 userdata = data; 2824 userdata = data;
1639} 2825}
1640 2826
1641void * 2827void *
1642ev_userdata (EV_P) 2828ev_userdata (EV_P) EV_NOEXCEPT
1643{ 2829{
1644 return userdata; 2830 return userdata;
1645} 2831}
1646 2832
2833void
1647void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2834ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1648{ 2835{
1649 invoke_cb = invoke_pending_cb; 2836 invoke_cb = invoke_pending_cb;
1650} 2837}
1651 2838
2839void
1652void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2840ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1653{ 2841{
1654 release_cb = release; 2842 release_cb = release;
1655 acquire_cb = acquire; 2843 acquire_cb = acquire;
1656} 2844}
1657#endif 2845#endif
1658 2846
1659/* initialise a loop structure, must be zero-initialised */ 2847/* initialise a loop structure, must be zero-initialised */
1660static void noinline 2848noinline ecb_cold
2849static void
1661loop_init (EV_P_ unsigned int flags) 2850loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1662{ 2851{
1663 if (!backend) 2852 if (!backend)
1664 { 2853 {
1665 origflags = flags; 2854 origflags = flags;
1666 2855
… …
1693 if (!(flags & EVFLAG_NOENV) 2882 if (!(flags & EVFLAG_NOENV)
1694 && !enable_secure () 2883 && !enable_secure ()
1695 && getenv ("LIBEV_FLAGS")) 2884 && getenv ("LIBEV_FLAGS"))
1696 flags = atoi (getenv ("LIBEV_FLAGS")); 2885 flags = atoi (getenv ("LIBEV_FLAGS"));
1697 2886
1698 ev_rt_now = ev_time (); 2887 ev_rt_now = ev_time ();
1699 mn_now = get_clock (); 2888 mn_now = get_clock ();
1700 now_floor = mn_now; 2889 now_floor = mn_now;
1701 rtmn_diff = ev_rt_now - mn_now; 2890 rtmn_diff = ev_rt_now - mn_now;
1702#if EV_FEATURE_API 2891#if EV_FEATURE_API
1703 invoke_cb = ev_invoke_pending; 2892 invoke_cb = ev_invoke_pending;
1704#endif 2893#endif
1705 2894
1706 io_blocktime = 0.; 2895 io_blocktime = 0.;
1707 timeout_blocktime = 0.; 2896 timeout_blocktime = 0.;
1708 backend = 0; 2897 backend = 0;
1709 backend_fd = -1; 2898 backend_fd = -1;
1710 sig_pending = 0; 2899 sig_pending = 0;
1711#if EV_ASYNC_ENABLE 2900#if EV_ASYNC_ENABLE
1712 async_pending = 0; 2901 async_pending = 0;
1713#endif 2902#endif
2903 pipe_write_skipped = 0;
2904 pipe_write_wanted = 0;
2905 evpipe [0] = -1;
2906 evpipe [1] = -1;
1714#if EV_USE_INOTIFY 2907#if EV_USE_INOTIFY
1715 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2908 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1716#endif 2909#endif
1717#if EV_USE_SIGNALFD 2910#if EV_USE_SIGNALFD
1718 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2911 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1719#endif 2912#endif
1720 2913
1721 if (!(flags & EVBACKEND_MASK)) 2914 if (!(flags & EVBACKEND_MASK))
1722 flags |= ev_recommended_backends (); 2915 flags |= ev_recommended_backends ();
1723 2916
… …
1748#endif 2941#endif
1749 } 2942 }
1750} 2943}
1751 2944
1752/* free up a loop structure */ 2945/* free up a loop structure */
2946ecb_cold
1753void 2947void
1754ev_loop_destroy (EV_P) 2948ev_loop_destroy (EV_P)
1755{ 2949{
1756 int i; 2950 int i;
1757 2951
… …
1769 EV_INVOKE_PENDING; 2963 EV_INVOKE_PENDING;
1770 } 2964 }
1771#endif 2965#endif
1772 2966
1773#if EV_CHILD_ENABLE 2967#if EV_CHILD_ENABLE
1774 if (ev_is_active (&childev)) 2968 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1775 { 2969 {
1776 ev_ref (EV_A); /* child watcher */ 2970 ev_ref (EV_A); /* child watcher */
1777 ev_signal_stop (EV_A_ &childev); 2971 ev_signal_stop (EV_A_ &childev);
1778 } 2972 }
1779#endif 2973#endif
… …
1781 if (ev_is_active (&pipe_w)) 2975 if (ev_is_active (&pipe_w))
1782 { 2976 {
1783 /*ev_ref (EV_A);*/ 2977 /*ev_ref (EV_A);*/
1784 /*ev_io_stop (EV_A_ &pipe_w);*/ 2978 /*ev_io_stop (EV_A_ &pipe_w);*/
1785 2979
1786#if EV_USE_EVENTFD
1787 if (evfd >= 0)
1788 close (evfd);
1789#endif
1790
1791 if (evpipe [0] >= 0)
1792 {
1793 EV_WIN32_CLOSE_FD (evpipe [0]); 2980 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1794 EV_WIN32_CLOSE_FD (evpipe [1]); 2981 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1795 }
1796 } 2982 }
1797 2983
1798#if EV_USE_SIGNALFD 2984#if EV_USE_SIGNALFD
1799 if (ev_is_active (&sigfd_w)) 2985 if (ev_is_active (&sigfd_w))
1800 close (sigfd); 2986 close (sigfd);
… …
1886#endif 3072#endif
1887#if EV_USE_INOTIFY 3073#if EV_USE_INOTIFY
1888 infy_fork (EV_A); 3074 infy_fork (EV_A);
1889#endif 3075#endif
1890 3076
3077#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1891 if (ev_is_active (&pipe_w)) 3078 if (ev_is_active (&pipe_w) && postfork != 2)
1892 { 3079 {
1893 /* this "locks" the handlers against writing to the pipe */ 3080 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1894 /* while we modify the fd vars */
1895 sig_pending = 1;
1896#if EV_ASYNC_ENABLE
1897 async_pending = 1;
1898#endif
1899 3081
1900 ev_ref (EV_A); 3082 ev_ref (EV_A);
1901 ev_io_stop (EV_A_ &pipe_w); 3083 ev_io_stop (EV_A_ &pipe_w);
1902 3084
1903#if EV_USE_EVENTFD
1904 if (evfd >= 0)
1905 close (evfd);
1906#endif
1907
1908 if (evpipe [0] >= 0) 3085 if (evpipe [0] >= 0)
1909 {
1910 EV_WIN32_CLOSE_FD (evpipe [0]); 3086 EV_WIN32_CLOSE_FD (evpipe [0]);
1911 EV_WIN32_CLOSE_FD (evpipe [1]);
1912 }
1913 3087
1914#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1915 evpipe_init (EV_A); 3088 evpipe_init (EV_A);
1916 /* now iterate over everything, in case we missed something */ 3089 /* iterate over everything, in case we missed something before */
1917 pipecb (EV_A_ &pipe_w, EV_READ); 3090 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1918#endif
1919 } 3091 }
3092#endif
1920 3093
1921 postfork = 0; 3094 postfork = 0;
1922} 3095}
1923 3096
1924#if EV_MULTIPLICITY 3097#if EV_MULTIPLICITY
1925 3098
3099ecb_cold
1926struct ev_loop * 3100struct ev_loop *
1927ev_loop_new (unsigned int flags) 3101ev_loop_new (unsigned int flags) EV_NOEXCEPT
1928{ 3102{
1929 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3103 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1930 3104
1931 memset (EV_A, 0, sizeof (struct ev_loop)); 3105 memset (EV_A, 0, sizeof (struct ev_loop));
1932 loop_init (EV_A_ flags); 3106 loop_init (EV_A_ flags);
… …
1939} 3113}
1940 3114
1941#endif /* multiplicity */ 3115#endif /* multiplicity */
1942 3116
1943#if EV_VERIFY 3117#if EV_VERIFY
1944static void noinline 3118noinline ecb_cold
3119static void
1945verify_watcher (EV_P_ W w) 3120verify_watcher (EV_P_ W w)
1946{ 3121{
1947 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3122 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1948 3123
1949 if (w->pending) 3124 if (w->pending)
1950 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3125 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1951} 3126}
1952 3127
1953static void noinline 3128noinline ecb_cold
3129static void
1954verify_heap (EV_P_ ANHE *heap, int N) 3130verify_heap (EV_P_ ANHE *heap, int N)
1955{ 3131{
1956 int i; 3132 int i;
1957 3133
1958 for (i = HEAP0; i < N + HEAP0; ++i) 3134 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1963 3139
1964 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3140 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1965 } 3141 }
1966} 3142}
1967 3143
1968static void noinline 3144noinline ecb_cold
3145static void
1969array_verify (EV_P_ W *ws, int cnt) 3146array_verify (EV_P_ W *ws, int cnt)
1970{ 3147{
1971 while (cnt--) 3148 while (cnt--)
1972 { 3149 {
1973 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3150 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1975 } 3152 }
1976} 3153}
1977#endif 3154#endif
1978 3155
1979#if EV_FEATURE_API 3156#if EV_FEATURE_API
1980void 3157void ecb_cold
1981ev_verify (EV_P) 3158ev_verify (EV_P) EV_NOEXCEPT
1982{ 3159{
1983#if EV_VERIFY 3160#if EV_VERIFY
1984 int i; 3161 int i;
1985 WL w; 3162 WL w, w2;
1986 3163
1987 assert (activecnt >= -1); 3164 assert (activecnt >= -1);
1988 3165
1989 assert (fdchangemax >= fdchangecnt); 3166 assert (fdchangemax >= fdchangecnt);
1990 for (i = 0; i < fdchangecnt; ++i) 3167 for (i = 0; i < fdchangecnt; ++i)
1991 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3168 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1992 3169
1993 assert (anfdmax >= 0); 3170 assert (anfdmax >= 0);
1994 for (i = 0; i < anfdmax; ++i) 3171 for (i = 0; i < anfdmax; ++i)
3172 {
3173 int j = 0;
3174
1995 for (w = anfds [i].head; w; w = w->next) 3175 for (w = w2 = anfds [i].head; w; w = w->next)
1996 { 3176 {
1997 verify_watcher (EV_A_ (W)w); 3177 verify_watcher (EV_A_ (W)w);
3178
3179 if (j++ & 1)
3180 {
3181 assert (("libev: io watcher list contains a loop", w != w2));
3182 w2 = w2->next;
3183 }
3184
1998 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3185 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1999 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3186 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2000 } 3187 }
3188 }
2001 3189
2002 assert (timermax >= timercnt); 3190 assert (timermax >= timercnt);
2003 verify_heap (EV_A_ timers, timercnt); 3191 verify_heap (EV_A_ timers, timercnt);
2004 3192
2005#if EV_PERIODIC_ENABLE 3193#if EV_PERIODIC_ENABLE
… …
2051#endif 3239#endif
2052} 3240}
2053#endif 3241#endif
2054 3242
2055#if EV_MULTIPLICITY 3243#if EV_MULTIPLICITY
3244ecb_cold
2056struct ev_loop * 3245struct ev_loop *
2057#else 3246#else
2058int 3247int
2059#endif 3248#endif
2060ev_default_loop (unsigned int flags) 3249ev_default_loop (unsigned int flags) EV_NOEXCEPT
2061{ 3250{
2062 if (!ev_default_loop_ptr) 3251 if (!ev_default_loop_ptr)
2063 { 3252 {
2064#if EV_MULTIPLICITY 3253#if EV_MULTIPLICITY
2065 EV_P = ev_default_loop_ptr = &default_loop_struct; 3254 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2084 3273
2085 return ev_default_loop_ptr; 3274 return ev_default_loop_ptr;
2086} 3275}
2087 3276
2088void 3277void
2089ev_loop_fork (EV_P) 3278ev_loop_fork (EV_P) EV_NOEXCEPT
2090{ 3279{
2091 postfork = 1; /* must be in line with ev_default_fork */ 3280 postfork = 1;
2092} 3281}
2093 3282
2094/*****************************************************************************/ 3283/*****************************************************************************/
2095 3284
2096void 3285void
… …
2098{ 3287{
2099 EV_CB_INVOKE ((W)w, revents); 3288 EV_CB_INVOKE ((W)w, revents);
2100} 3289}
2101 3290
2102unsigned int 3291unsigned int
2103ev_pending_count (EV_P) 3292ev_pending_count (EV_P) EV_NOEXCEPT
2104{ 3293{
2105 int pri; 3294 int pri;
2106 unsigned int count = 0; 3295 unsigned int count = 0;
2107 3296
2108 for (pri = NUMPRI; pri--; ) 3297 for (pri = NUMPRI; pri--; )
2109 count += pendingcnt [pri]; 3298 count += pendingcnt [pri];
2110 3299
2111 return count; 3300 return count;
2112} 3301}
2113 3302
2114void noinline 3303noinline
3304void
2115ev_invoke_pending (EV_P) 3305ev_invoke_pending (EV_P)
2116{ 3306{
2117 int pri; 3307 pendingpri = NUMPRI;
2118 3308
2119 for (pri = NUMPRI; pri--; ) 3309 do
3310 {
3311 --pendingpri;
3312
3313 /* pendingpri possibly gets modified in the inner loop */
2120 while (pendingcnt [pri]) 3314 while (pendingcnt [pendingpri])
2121 { 3315 {
2122 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3316 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2123 3317
2124 p->w->pending = 0; 3318 p->w->pending = 0;
2125 EV_CB_INVOKE (p->w, p->events); 3319 EV_CB_INVOKE (p->w, p->events);
2126 EV_FREQUENT_CHECK; 3320 EV_FREQUENT_CHECK;
2127 } 3321 }
3322 }
3323 while (pendingpri);
2128} 3324}
2129 3325
2130#if EV_IDLE_ENABLE 3326#if EV_IDLE_ENABLE
2131/* make idle watchers pending. this handles the "call-idle */ 3327/* make idle watchers pending. this handles the "call-idle */
2132/* only when higher priorities are idle" logic */ 3328/* only when higher priorities are idle" logic */
… …
2189 feed_reverse_done (EV_A_ EV_TIMER); 3385 feed_reverse_done (EV_A_ EV_TIMER);
2190 } 3386 }
2191} 3387}
2192 3388
2193#if EV_PERIODIC_ENABLE 3389#if EV_PERIODIC_ENABLE
3390
3391noinline
3392static void
3393periodic_recalc (EV_P_ ev_periodic *w)
3394{
3395 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3396 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3397
3398 /* the above almost always errs on the low side */
3399 while (at <= ev_rt_now)
3400 {
3401 ev_tstamp nat = at + w->interval;
3402
3403 /* when resolution fails us, we use ev_rt_now */
3404 if (expect_false (nat == at))
3405 {
3406 at = ev_rt_now;
3407 break;
3408 }
3409
3410 at = nat;
3411 }
3412
3413 ev_at (w) = at;
3414}
3415
2194/* make periodics pending */ 3416/* make periodics pending */
2195inline_size void 3417inline_size void
2196periodics_reify (EV_P) 3418periodics_reify (EV_P)
2197{ 3419{
2198 EV_FREQUENT_CHECK; 3420 EV_FREQUENT_CHECK;
2199 3421
2200 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3422 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2201 { 3423 {
2202 int feed_count = 0;
2203
2204 do 3424 do
2205 { 3425 {
2206 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3426 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2207 3427
2208 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3428 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2217 ANHE_at_cache (periodics [HEAP0]); 3437 ANHE_at_cache (periodics [HEAP0]);
2218 downheap (periodics, periodiccnt, HEAP0); 3438 downheap (periodics, periodiccnt, HEAP0);
2219 } 3439 }
2220 else if (w->interval) 3440 else if (w->interval)
2221 { 3441 {
2222 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3442 periodic_recalc (EV_A_ w);
2223 /* if next trigger time is not sufficiently in the future, put it there */
2224 /* this might happen because of floating point inexactness */
2225 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2226 {
2227 ev_at (w) += w->interval;
2228
2229 /* if interval is unreasonably low we might still have a time in the past */
2230 /* so correct this. this will make the periodic very inexact, but the user */
2231 /* has effectively asked to get triggered more often than possible */
2232 if (ev_at (w) < ev_rt_now)
2233 ev_at (w) = ev_rt_now;
2234 }
2235
2236 ANHE_at_cache (periodics [HEAP0]); 3443 ANHE_at_cache (periodics [HEAP0]);
2237 downheap (periodics, periodiccnt, HEAP0); 3444 downheap (periodics, periodiccnt, HEAP0);
2238 } 3445 }
2239 else 3446 else
2240 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3447 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2248 } 3455 }
2249} 3456}
2250 3457
2251/* simply recalculate all periodics */ 3458/* simply recalculate all periodics */
2252/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3459/* TODO: maybe ensure that at least one event happens when jumping forward? */
2253static void noinline 3460noinline ecb_cold
3461static void
2254periodics_reschedule (EV_P) 3462periodics_reschedule (EV_P)
2255{ 3463{
2256 int i; 3464 int i;
2257 3465
2258 /* adjust periodics after time jump */ 3466 /* adjust periodics after time jump */
… …
2261 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3469 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2262 3470
2263 if (w->reschedule_cb) 3471 if (w->reschedule_cb)
2264 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3472 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2265 else if (w->interval) 3473 else if (w->interval)
2266 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3474 periodic_recalc (EV_A_ w);
2267 3475
2268 ANHE_at_cache (periodics [i]); 3476 ANHE_at_cache (periodics [i]);
2269 } 3477 }
2270 3478
2271 reheap (periodics, periodiccnt); 3479 reheap (periodics, periodiccnt);
2272} 3480}
2273#endif 3481#endif
2274 3482
2275/* adjust all timers by a given offset */ 3483/* adjust all timers by a given offset */
2276static void noinline 3484noinline ecb_cold
3485static void
2277timers_reschedule (EV_P_ ev_tstamp adjust) 3486timers_reschedule (EV_P_ ev_tstamp adjust)
2278{ 3487{
2279 int i; 3488 int i;
2280 3489
2281 for (i = 0; i < timercnt; ++i) 3490 for (i = 0; i < timercnt; ++i)
… …
2318 * doesn't hurt either as we only do this on time-jumps or 3527 * doesn't hurt either as we only do this on time-jumps or
2319 * in the unlikely event of having been preempted here. 3528 * in the unlikely event of having been preempted here.
2320 */ 3529 */
2321 for (i = 4; --i; ) 3530 for (i = 4; --i; )
2322 { 3531 {
3532 ev_tstamp diff;
2323 rtmn_diff = ev_rt_now - mn_now; 3533 rtmn_diff = ev_rt_now - mn_now;
2324 3534
3535 diff = odiff - rtmn_diff;
3536
2325 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3537 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2326 return; /* all is well */ 3538 return; /* all is well */
2327 3539
2328 ev_rt_now = ev_time (); 3540 ev_rt_now = ev_time ();
2329 mn_now = get_clock (); 3541 mn_now = get_clock ();
2330 now_floor = mn_now; 3542 now_floor = mn_now;
… …
2352 3564
2353 mn_now = ev_rt_now; 3565 mn_now = ev_rt_now;
2354 } 3566 }
2355} 3567}
2356 3568
2357void 3569int
2358ev_run (EV_P_ int flags) 3570ev_run (EV_P_ int flags)
2359{ 3571{
2360#if EV_FEATURE_API 3572#if EV_FEATURE_API
2361 ++loop_depth; 3573 ++loop_depth;
2362#endif 3574#endif
… …
2420 ev_tstamp prev_mn_now = mn_now; 3632 ev_tstamp prev_mn_now = mn_now;
2421 3633
2422 /* update time to cancel out callback processing overhead */ 3634 /* update time to cancel out callback processing overhead */
2423 time_update (EV_A_ 1e100); 3635 time_update (EV_A_ 1e100);
2424 3636
3637 /* from now on, we want a pipe-wake-up */
3638 pipe_write_wanted = 1;
3639
3640 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3641
2425 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3642 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2426 { 3643 {
2427 waittime = MAX_BLOCKTIME; 3644 waittime = MAX_BLOCKTIME;
2428 3645
2429 if (timercnt) 3646 if (timercnt)
2430 { 3647 {
2431 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3648 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2432 if (waittime > to) waittime = to; 3649 if (waittime > to) waittime = to;
2433 } 3650 }
2434 3651
2435#if EV_PERIODIC_ENABLE 3652#if EV_PERIODIC_ENABLE
2436 if (periodiccnt) 3653 if (periodiccnt)
2437 { 3654 {
2438 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3655 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2439 if (waittime > to) waittime = to; 3656 if (waittime > to) waittime = to;
2440 } 3657 }
2441#endif 3658#endif
2442 3659
2443 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3660 /* don't let timeouts decrease the waittime below timeout_blocktime */
2444 if (expect_false (waittime < timeout_blocktime)) 3661 if (expect_false (waittime < timeout_blocktime))
2445 waittime = timeout_blocktime; 3662 waittime = timeout_blocktime;
3663
3664 /* at this point, we NEED to wait, so we have to ensure */
3665 /* to pass a minimum nonzero value to the backend */
3666 if (expect_false (waittime < backend_mintime))
3667 waittime = backend_mintime;
2446 3668
2447 /* extra check because io_blocktime is commonly 0 */ 3669 /* extra check because io_blocktime is commonly 0 */
2448 if (expect_false (io_blocktime)) 3670 if (expect_false (io_blocktime))
2449 { 3671 {
2450 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3672 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2451 3673
2452 if (sleeptime > waittime - backend_fudge) 3674 if (sleeptime > waittime - backend_mintime)
2453 sleeptime = waittime - backend_fudge; 3675 sleeptime = waittime - backend_mintime;
2454 3676
2455 if (expect_true (sleeptime > 0.)) 3677 if (expect_true (sleeptime > 0.))
2456 { 3678 {
2457 ev_sleep (sleeptime); 3679 ev_sleep (sleeptime);
2458 waittime -= sleeptime; 3680 waittime -= sleeptime;
… …
2465#endif 3687#endif
2466 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3688 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2467 backend_poll (EV_A_ waittime); 3689 backend_poll (EV_A_ waittime);
2468 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3690 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2469 3691
3692 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3693
3694 ECB_MEMORY_FENCE_ACQUIRE;
3695 if (pipe_write_skipped)
3696 {
3697 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3698 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3699 }
3700
3701
2470 /* update ev_rt_now, do magic */ 3702 /* update ev_rt_now, do magic */
2471 time_update (EV_A_ waittime + sleeptime); 3703 time_update (EV_A_ waittime + sleeptime);
2472 } 3704 }
2473 3705
2474 /* queue pending timers and reschedule them */ 3706 /* queue pending timers and reschedule them */
… …
2500 loop_done = EVBREAK_CANCEL; 3732 loop_done = EVBREAK_CANCEL;
2501 3733
2502#if EV_FEATURE_API 3734#if EV_FEATURE_API
2503 --loop_depth; 3735 --loop_depth;
2504#endif 3736#endif
2505}
2506 3737
3738 return activecnt;
3739}
3740
2507void 3741void
2508ev_break (EV_P_ int how) 3742ev_break (EV_P_ int how) EV_NOEXCEPT
2509{ 3743{
2510 loop_done = how; 3744 loop_done = how;
2511} 3745}
2512 3746
2513void 3747void
2514ev_ref (EV_P) 3748ev_ref (EV_P) EV_NOEXCEPT
2515{ 3749{
2516 ++activecnt; 3750 ++activecnt;
2517} 3751}
2518 3752
2519void 3753void
2520ev_unref (EV_P) 3754ev_unref (EV_P) EV_NOEXCEPT
2521{ 3755{
2522 --activecnt; 3756 --activecnt;
2523} 3757}
2524 3758
2525void 3759void
2526ev_now_update (EV_P) 3760ev_now_update (EV_P) EV_NOEXCEPT
2527{ 3761{
2528 time_update (EV_A_ 1e100); 3762 time_update (EV_A_ 1e100);
2529} 3763}
2530 3764
2531void 3765void
2532ev_suspend (EV_P) 3766ev_suspend (EV_P) EV_NOEXCEPT
2533{ 3767{
2534 ev_now_update (EV_A); 3768 ev_now_update (EV_A);
2535} 3769}
2536 3770
2537void 3771void
2538ev_resume (EV_P) 3772ev_resume (EV_P) EV_NOEXCEPT
2539{ 3773{
2540 ev_tstamp mn_prev = mn_now; 3774 ev_tstamp mn_prev = mn_now;
2541 3775
2542 ev_now_update (EV_A); 3776 ev_now_update (EV_A);
2543 timers_reschedule (EV_A_ mn_now - mn_prev); 3777 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2582 w->pending = 0; 3816 w->pending = 0;
2583 } 3817 }
2584} 3818}
2585 3819
2586int 3820int
2587ev_clear_pending (EV_P_ void *w) 3821ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2588{ 3822{
2589 W w_ = (W)w; 3823 W w_ = (W)w;
2590 int pending = w_->pending; 3824 int pending = w_->pending;
2591 3825
2592 if (expect_true (pending)) 3826 if (expect_true (pending))
… …
2624 w->active = 0; 3858 w->active = 0;
2625} 3859}
2626 3860
2627/*****************************************************************************/ 3861/*****************************************************************************/
2628 3862
2629void noinline 3863noinline
3864void
2630ev_io_start (EV_P_ ev_io *w) 3865ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2631{ 3866{
2632 int fd = w->fd; 3867 int fd = w->fd;
2633 3868
2634 if (expect_false (ev_is_active (w))) 3869 if (expect_false (ev_is_active (w)))
2635 return; 3870 return;
… …
2641 3876
2642 ev_start (EV_A_ (W)w, 1); 3877 ev_start (EV_A_ (W)w, 1);
2643 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3878 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2644 wlist_add (&anfds[fd].head, (WL)w); 3879 wlist_add (&anfds[fd].head, (WL)w);
2645 3880
3881 /* common bug, apparently */
3882 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3883
2646 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3884 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2647 w->events &= ~EV__IOFDSET; 3885 w->events &= ~EV__IOFDSET;
2648 3886
2649 EV_FREQUENT_CHECK; 3887 EV_FREQUENT_CHECK;
2650} 3888}
2651 3889
2652void noinline 3890noinline
3891void
2653ev_io_stop (EV_P_ ev_io *w) 3892ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2654{ 3893{
2655 clear_pending (EV_A_ (W)w); 3894 clear_pending (EV_A_ (W)w);
2656 if (expect_false (!ev_is_active (w))) 3895 if (expect_false (!ev_is_active (w)))
2657 return; 3896 return;
2658 3897
… …
2666 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3905 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2667 3906
2668 EV_FREQUENT_CHECK; 3907 EV_FREQUENT_CHECK;
2669} 3908}
2670 3909
2671void noinline 3910noinline
3911void
2672ev_timer_start (EV_P_ ev_timer *w) 3912ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2673{ 3913{
2674 if (expect_false (ev_is_active (w))) 3914 if (expect_false (ev_is_active (w)))
2675 return; 3915 return;
2676 3916
2677 ev_at (w) += mn_now; 3917 ev_at (w) += mn_now;
… …
2690 EV_FREQUENT_CHECK; 3930 EV_FREQUENT_CHECK;
2691 3931
2692 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3932 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2693} 3933}
2694 3934
2695void noinline 3935noinline
3936void
2696ev_timer_stop (EV_P_ ev_timer *w) 3937ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2697{ 3938{
2698 clear_pending (EV_A_ (W)w); 3939 clear_pending (EV_A_ (W)w);
2699 if (expect_false (!ev_is_active (w))) 3940 if (expect_false (!ev_is_active (w)))
2700 return; 3941 return;
2701 3942
… …
2720 ev_stop (EV_A_ (W)w); 3961 ev_stop (EV_A_ (W)w);
2721 3962
2722 EV_FREQUENT_CHECK; 3963 EV_FREQUENT_CHECK;
2723} 3964}
2724 3965
2725void noinline 3966noinline
3967void
2726ev_timer_again (EV_P_ ev_timer *w) 3968ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2727{ 3969{
2728 EV_FREQUENT_CHECK; 3970 EV_FREQUENT_CHECK;
3971
3972 clear_pending (EV_A_ (W)w);
2729 3973
2730 if (ev_is_active (w)) 3974 if (ev_is_active (w))
2731 { 3975 {
2732 if (w->repeat) 3976 if (w->repeat)
2733 { 3977 {
… …
2746 3990
2747 EV_FREQUENT_CHECK; 3991 EV_FREQUENT_CHECK;
2748} 3992}
2749 3993
2750ev_tstamp 3994ev_tstamp
2751ev_timer_remaining (EV_P_ ev_timer *w) 3995ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2752{ 3996{
2753 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3997 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2754} 3998}
2755 3999
2756#if EV_PERIODIC_ENABLE 4000#if EV_PERIODIC_ENABLE
2757void noinline 4001noinline
4002void
2758ev_periodic_start (EV_P_ ev_periodic *w) 4003ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2759{ 4004{
2760 if (expect_false (ev_is_active (w))) 4005 if (expect_false (ev_is_active (w)))
2761 return; 4006 return;
2762 4007
2763 if (w->reschedule_cb) 4008 if (w->reschedule_cb)
2764 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4009 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2765 else if (w->interval) 4010 else if (w->interval)
2766 { 4011 {
2767 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4012 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2768 /* this formula differs from the one in periodic_reify because we do not always round up */ 4013 periodic_recalc (EV_A_ w);
2769 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2770 } 4014 }
2771 else 4015 else
2772 ev_at (w) = w->offset; 4016 ev_at (w) = w->offset;
2773 4017
2774 EV_FREQUENT_CHECK; 4018 EV_FREQUENT_CHECK;
… …
2783 EV_FREQUENT_CHECK; 4027 EV_FREQUENT_CHECK;
2784 4028
2785 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4029 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2786} 4030}
2787 4031
2788void noinline 4032noinline
4033void
2789ev_periodic_stop (EV_P_ ev_periodic *w) 4034ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2790{ 4035{
2791 clear_pending (EV_A_ (W)w); 4036 clear_pending (EV_A_ (W)w);
2792 if (expect_false (!ev_is_active (w))) 4037 if (expect_false (!ev_is_active (w)))
2793 return; 4038 return;
2794 4039
… …
2811 ev_stop (EV_A_ (W)w); 4056 ev_stop (EV_A_ (W)w);
2812 4057
2813 EV_FREQUENT_CHECK; 4058 EV_FREQUENT_CHECK;
2814} 4059}
2815 4060
2816void noinline 4061noinline
4062void
2817ev_periodic_again (EV_P_ ev_periodic *w) 4063ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2818{ 4064{
2819 /* TODO: use adjustheap and recalculation */ 4065 /* TODO: use adjustheap and recalculation */
2820 ev_periodic_stop (EV_A_ w); 4066 ev_periodic_stop (EV_A_ w);
2821 ev_periodic_start (EV_A_ w); 4067 ev_periodic_start (EV_A_ w);
2822} 4068}
… …
2826# define SA_RESTART 0 4072# define SA_RESTART 0
2827#endif 4073#endif
2828 4074
2829#if EV_SIGNAL_ENABLE 4075#if EV_SIGNAL_ENABLE
2830 4076
2831void noinline 4077noinline
4078void
2832ev_signal_start (EV_P_ ev_signal *w) 4079ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2833{ 4080{
2834 if (expect_false (ev_is_active (w))) 4081 if (expect_false (ev_is_active (w)))
2835 return; 4082 return;
2836 4083
2837 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4084 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2839#if EV_MULTIPLICITY 4086#if EV_MULTIPLICITY
2840 assert (("libev: a signal must not be attached to two different loops", 4087 assert (("libev: a signal must not be attached to two different loops",
2841 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4088 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2842 4089
2843 signals [w->signum - 1].loop = EV_A; 4090 signals [w->signum - 1].loop = EV_A;
4091 ECB_MEMORY_FENCE_RELEASE;
2844#endif 4092#endif
2845 4093
2846 EV_FREQUENT_CHECK; 4094 EV_FREQUENT_CHECK;
2847 4095
2848#if EV_USE_SIGNALFD 4096#if EV_USE_SIGNALFD
… …
2907 } 4155 }
2908 4156
2909 EV_FREQUENT_CHECK; 4157 EV_FREQUENT_CHECK;
2910} 4158}
2911 4159
2912void noinline 4160noinline
4161void
2913ev_signal_stop (EV_P_ ev_signal *w) 4162ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2914{ 4163{
2915 clear_pending (EV_A_ (W)w); 4164 clear_pending (EV_A_ (W)w);
2916 if (expect_false (!ev_is_active (w))) 4165 if (expect_false (!ev_is_active (w)))
2917 return; 4166 return;
2918 4167
… …
2949#endif 4198#endif
2950 4199
2951#if EV_CHILD_ENABLE 4200#if EV_CHILD_ENABLE
2952 4201
2953void 4202void
2954ev_child_start (EV_P_ ev_child *w) 4203ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2955{ 4204{
2956#if EV_MULTIPLICITY 4205#if EV_MULTIPLICITY
2957 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4206 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2958#endif 4207#endif
2959 if (expect_false (ev_is_active (w))) 4208 if (expect_false (ev_is_active (w)))
… …
2966 4215
2967 EV_FREQUENT_CHECK; 4216 EV_FREQUENT_CHECK;
2968} 4217}
2969 4218
2970void 4219void
2971ev_child_stop (EV_P_ ev_child *w) 4220ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2972{ 4221{
2973 clear_pending (EV_A_ (W)w); 4222 clear_pending (EV_A_ (W)w);
2974 if (expect_false (!ev_is_active (w))) 4223 if (expect_false (!ev_is_active (w)))
2975 return; 4224 return;
2976 4225
… …
2993 4242
2994#define DEF_STAT_INTERVAL 5.0074891 4243#define DEF_STAT_INTERVAL 5.0074891
2995#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4244#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2996#define MIN_STAT_INTERVAL 0.1074891 4245#define MIN_STAT_INTERVAL 0.1074891
2997 4246
2998static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4247noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2999 4248
3000#if EV_USE_INOTIFY 4249#if EV_USE_INOTIFY
3001 4250
3002/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4251/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3003# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4252# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3004 4253
3005static void noinline 4254noinline
4255static void
3006infy_add (EV_P_ ev_stat *w) 4256infy_add (EV_P_ ev_stat *w)
3007{ 4257{
3008 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); 4258 w->wd = inotify_add_watch (fs_fd, w->path,
4259 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4260 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4261 | IN_DONT_FOLLOW | IN_MASK_ADD);
3009 4262
3010 if (w->wd >= 0) 4263 if (w->wd >= 0)
3011 { 4264 {
3012 struct statfs sfs; 4265 struct statfs sfs;
3013 4266
… …
3017 4270
3018 if (!fs_2625) 4271 if (!fs_2625)
3019 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4272 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3020 else if (!statfs (w->path, &sfs) 4273 else if (!statfs (w->path, &sfs)
3021 && (sfs.f_type == 0x1373 /* devfs */ 4274 && (sfs.f_type == 0x1373 /* devfs */
4275 || sfs.f_type == 0x4006 /* fat */
4276 || sfs.f_type == 0x4d44 /* msdos */
3022 || sfs.f_type == 0xEF53 /* ext2/3 */ 4277 || sfs.f_type == 0xEF53 /* ext2/3 */
4278 || sfs.f_type == 0x72b6 /* jffs2 */
4279 || sfs.f_type == 0x858458f6 /* ramfs */
4280 || sfs.f_type == 0x5346544e /* ntfs */
3023 || sfs.f_type == 0x3153464a /* jfs */ 4281 || sfs.f_type == 0x3153464a /* jfs */
4282 || sfs.f_type == 0x9123683e /* btrfs */
3024 || sfs.f_type == 0x52654973 /* reiser3 */ 4283 || sfs.f_type == 0x52654973 /* reiser3 */
3025 || sfs.f_type == 0x01021994 /* tempfs */ 4284 || sfs.f_type == 0x01021994 /* tmpfs */
3026 || sfs.f_type == 0x58465342 /* xfs */)) 4285 || sfs.f_type == 0x58465342 /* xfs */))
3027 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4286 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3028 else 4287 else
3029 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4288 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3030 } 4289 }
… …
3051 if (!pend || pend == path) 4310 if (!pend || pend == path)
3052 break; 4311 break;
3053 4312
3054 *pend = 0; 4313 *pend = 0;
3055 w->wd = inotify_add_watch (fs_fd, path, mask); 4314 w->wd = inotify_add_watch (fs_fd, path, mask);
3056 } 4315 }
3057 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4316 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3058 } 4317 }
3059 } 4318 }
3060 4319
3061 if (w->wd >= 0) 4320 if (w->wd >= 0)
… …
3065 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4324 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3066 ev_timer_again (EV_A_ &w->timer); 4325 ev_timer_again (EV_A_ &w->timer);
3067 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4326 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3068} 4327}
3069 4328
3070static void noinline 4329noinline
4330static void
3071infy_del (EV_P_ ev_stat *w) 4331infy_del (EV_P_ ev_stat *w)
3072{ 4332{
3073 int slot; 4333 int slot;
3074 int wd = w->wd; 4334 int wd = w->wd;
3075 4335
… …
3082 4342
3083 /* remove this watcher, if others are watching it, they will rearm */ 4343 /* remove this watcher, if others are watching it, they will rearm */
3084 inotify_rm_watch (fs_fd, wd); 4344 inotify_rm_watch (fs_fd, wd);
3085} 4345}
3086 4346
3087static void noinline 4347noinline
4348static void
3088infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4349infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3089{ 4350{
3090 if (slot < 0) 4351 if (slot < 0)
3091 /* overflow, need to check for all hash slots */ 4352 /* overflow, need to check for all hash slots */
3092 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4353 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3128 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4389 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3129 ofs += sizeof (struct inotify_event) + ev->len; 4390 ofs += sizeof (struct inotify_event) + ev->len;
3130 } 4391 }
3131} 4392}
3132 4393
3133inline_size void 4394inline_size ecb_cold
4395void
3134ev_check_2625 (EV_P) 4396ev_check_2625 (EV_P)
3135{ 4397{
3136 /* kernels < 2.6.25 are borked 4398 /* kernels < 2.6.25 are borked
3137 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4399 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3138 */ 4400 */
… …
3143} 4405}
3144 4406
3145inline_size int 4407inline_size int
3146infy_newfd (void) 4408infy_newfd (void)
3147{ 4409{
3148#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4410#if defined IN_CLOEXEC && defined IN_NONBLOCK
3149 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4411 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3150 if (fd >= 0) 4412 if (fd >= 0)
3151 return fd; 4413 return fd;
3152#endif 4414#endif
3153 return inotify_init (); 4415 return inotify_init ();
… …
3228#else 4490#else
3229# define EV_LSTAT(p,b) lstat (p, b) 4491# define EV_LSTAT(p,b) lstat (p, b)
3230#endif 4492#endif
3231 4493
3232void 4494void
3233ev_stat_stat (EV_P_ ev_stat *w) 4495ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3234{ 4496{
3235 if (lstat (w->path, &w->attr) < 0) 4497 if (lstat (w->path, &w->attr) < 0)
3236 w->attr.st_nlink = 0; 4498 w->attr.st_nlink = 0;
3237 else if (!w->attr.st_nlink) 4499 else if (!w->attr.st_nlink)
3238 w->attr.st_nlink = 1; 4500 w->attr.st_nlink = 1;
3239} 4501}
3240 4502
3241static void noinline 4503noinline
4504static void
3242stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4505stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3243{ 4506{
3244 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4507 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3245 4508
3246 ev_statdata prev = w->attr; 4509 ev_statdata prev = w->attr;
… …
3277 ev_feed_event (EV_A_ w, EV_STAT); 4540 ev_feed_event (EV_A_ w, EV_STAT);
3278 } 4541 }
3279} 4542}
3280 4543
3281void 4544void
3282ev_stat_start (EV_P_ ev_stat *w) 4545ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3283{ 4546{
3284 if (expect_false (ev_is_active (w))) 4547 if (expect_false (ev_is_active (w)))
3285 return; 4548 return;
3286 4549
3287 ev_stat_stat (EV_A_ w); 4550 ev_stat_stat (EV_A_ w);
… …
3308 4571
3309 EV_FREQUENT_CHECK; 4572 EV_FREQUENT_CHECK;
3310} 4573}
3311 4574
3312void 4575void
3313ev_stat_stop (EV_P_ ev_stat *w) 4576ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3314{ 4577{
3315 clear_pending (EV_A_ (W)w); 4578 clear_pending (EV_A_ (W)w);
3316 if (expect_false (!ev_is_active (w))) 4579 if (expect_false (!ev_is_active (w)))
3317 return; 4580 return;
3318 4581
… …
3334} 4597}
3335#endif 4598#endif
3336 4599
3337#if EV_IDLE_ENABLE 4600#if EV_IDLE_ENABLE
3338void 4601void
3339ev_idle_start (EV_P_ ev_idle *w) 4602ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3340{ 4603{
3341 if (expect_false (ev_is_active (w))) 4604 if (expect_false (ev_is_active (w)))
3342 return; 4605 return;
3343 4606
3344 pri_adjust (EV_A_ (W)w); 4607 pri_adjust (EV_A_ (W)w);
… …
3357 4620
3358 EV_FREQUENT_CHECK; 4621 EV_FREQUENT_CHECK;
3359} 4622}
3360 4623
3361void 4624void
3362ev_idle_stop (EV_P_ ev_idle *w) 4625ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3363{ 4626{
3364 clear_pending (EV_A_ (W)w); 4627 clear_pending (EV_A_ (W)w);
3365 if (expect_false (!ev_is_active (w))) 4628 if (expect_false (!ev_is_active (w)))
3366 return; 4629 return;
3367 4630
… …
3381} 4644}
3382#endif 4645#endif
3383 4646
3384#if EV_PREPARE_ENABLE 4647#if EV_PREPARE_ENABLE
3385void 4648void
3386ev_prepare_start (EV_P_ ev_prepare *w) 4649ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3387{ 4650{
3388 if (expect_false (ev_is_active (w))) 4651 if (expect_false (ev_is_active (w)))
3389 return; 4652 return;
3390 4653
3391 EV_FREQUENT_CHECK; 4654 EV_FREQUENT_CHECK;
… …
3396 4659
3397 EV_FREQUENT_CHECK; 4660 EV_FREQUENT_CHECK;
3398} 4661}
3399 4662
3400void 4663void
3401ev_prepare_stop (EV_P_ ev_prepare *w) 4664ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3402{ 4665{
3403 clear_pending (EV_A_ (W)w); 4666 clear_pending (EV_A_ (W)w);
3404 if (expect_false (!ev_is_active (w))) 4667 if (expect_false (!ev_is_active (w)))
3405 return; 4668 return;
3406 4669
… …
3419} 4682}
3420#endif 4683#endif
3421 4684
3422#if EV_CHECK_ENABLE 4685#if EV_CHECK_ENABLE
3423void 4686void
3424ev_check_start (EV_P_ ev_check *w) 4687ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3425{ 4688{
3426 if (expect_false (ev_is_active (w))) 4689 if (expect_false (ev_is_active (w)))
3427 return; 4690 return;
3428 4691
3429 EV_FREQUENT_CHECK; 4692 EV_FREQUENT_CHECK;
… …
3434 4697
3435 EV_FREQUENT_CHECK; 4698 EV_FREQUENT_CHECK;
3436} 4699}
3437 4700
3438void 4701void
3439ev_check_stop (EV_P_ ev_check *w) 4702ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3440{ 4703{
3441 clear_pending (EV_A_ (W)w); 4704 clear_pending (EV_A_ (W)w);
3442 if (expect_false (!ev_is_active (w))) 4705 if (expect_false (!ev_is_active (w)))
3443 return; 4706 return;
3444 4707
… …
3456 EV_FREQUENT_CHECK; 4719 EV_FREQUENT_CHECK;
3457} 4720}
3458#endif 4721#endif
3459 4722
3460#if EV_EMBED_ENABLE 4723#if EV_EMBED_ENABLE
3461void noinline 4724noinline
4725void
3462ev_embed_sweep (EV_P_ ev_embed *w) 4726ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3463{ 4727{
3464 ev_run (w->other, EVRUN_NOWAIT); 4728 ev_run (w->other, EVRUN_NOWAIT);
3465} 4729}
3466 4730
3467static void 4731static void
… …
3515 ev_idle_stop (EV_A_ idle); 4779 ev_idle_stop (EV_A_ idle);
3516} 4780}
3517#endif 4781#endif
3518 4782
3519void 4783void
3520ev_embed_start (EV_P_ ev_embed *w) 4784ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3521{ 4785{
3522 if (expect_false (ev_is_active (w))) 4786 if (expect_false (ev_is_active (w)))
3523 return; 4787 return;
3524 4788
3525 { 4789 {
… …
3546 4810
3547 EV_FREQUENT_CHECK; 4811 EV_FREQUENT_CHECK;
3548} 4812}
3549 4813
3550void 4814void
3551ev_embed_stop (EV_P_ ev_embed *w) 4815ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3552{ 4816{
3553 clear_pending (EV_A_ (W)w); 4817 clear_pending (EV_A_ (W)w);
3554 if (expect_false (!ev_is_active (w))) 4818 if (expect_false (!ev_is_active (w)))
3555 return; 4819 return;
3556 4820
… …
3566} 4830}
3567#endif 4831#endif
3568 4832
3569#if EV_FORK_ENABLE 4833#if EV_FORK_ENABLE
3570void 4834void
3571ev_fork_start (EV_P_ ev_fork *w) 4835ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3572{ 4836{
3573 if (expect_false (ev_is_active (w))) 4837 if (expect_false (ev_is_active (w)))
3574 return; 4838 return;
3575 4839
3576 EV_FREQUENT_CHECK; 4840 EV_FREQUENT_CHECK;
… …
3581 4845
3582 EV_FREQUENT_CHECK; 4846 EV_FREQUENT_CHECK;
3583} 4847}
3584 4848
3585void 4849void
3586ev_fork_stop (EV_P_ ev_fork *w) 4850ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3587{ 4851{
3588 clear_pending (EV_A_ (W)w); 4852 clear_pending (EV_A_ (W)w);
3589 if (expect_false (!ev_is_active (w))) 4853 if (expect_false (!ev_is_active (w)))
3590 return; 4854 return;
3591 4855
… …
3604} 4868}
3605#endif 4869#endif
3606 4870
3607#if EV_CLEANUP_ENABLE 4871#if EV_CLEANUP_ENABLE
3608void 4872void
3609ev_cleanup_start (EV_P_ ev_cleanup *w) 4873ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3610{ 4874{
3611 if (expect_false (ev_is_active (w))) 4875 if (expect_false (ev_is_active (w)))
3612 return; 4876 return;
3613 4877
3614 EV_FREQUENT_CHECK; 4878 EV_FREQUENT_CHECK;
… …
3621 ev_unref (EV_A); 4885 ev_unref (EV_A);
3622 EV_FREQUENT_CHECK; 4886 EV_FREQUENT_CHECK;
3623} 4887}
3624 4888
3625void 4889void
3626ev_cleanup_stop (EV_P_ ev_cleanup *w) 4890ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3627{ 4891{
3628 clear_pending (EV_A_ (W)w); 4892 clear_pending (EV_A_ (W)w);
3629 if (expect_false (!ev_is_active (w))) 4893 if (expect_false (!ev_is_active (w)))
3630 return; 4894 return;
3631 4895
… …
3645} 4909}
3646#endif 4910#endif
3647 4911
3648#if EV_ASYNC_ENABLE 4912#if EV_ASYNC_ENABLE
3649void 4913void
3650ev_async_start (EV_P_ ev_async *w) 4914ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3651{ 4915{
3652 if (expect_false (ev_is_active (w))) 4916 if (expect_false (ev_is_active (w)))
3653 return; 4917 return;
3654 4918
3655 w->sent = 0; 4919 w->sent = 0;
… …
3664 4928
3665 EV_FREQUENT_CHECK; 4929 EV_FREQUENT_CHECK;
3666} 4930}
3667 4931
3668void 4932void
3669ev_async_stop (EV_P_ ev_async *w) 4933ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3670{ 4934{
3671 clear_pending (EV_A_ (W)w); 4935 clear_pending (EV_A_ (W)w);
3672 if (expect_false (!ev_is_active (w))) 4936 if (expect_false (!ev_is_active (w)))
3673 return; 4937 return;
3674 4938
… …
3685 4949
3686 EV_FREQUENT_CHECK; 4950 EV_FREQUENT_CHECK;
3687} 4951}
3688 4952
3689void 4953void
3690ev_async_send (EV_P_ ev_async *w) 4954ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3691{ 4955{
3692 w->sent = 1; 4956 w->sent = 1;
3693 evpipe_write (EV_A_ &async_pending); 4957 evpipe_write (EV_A_ &async_pending);
3694} 4958}
3695#endif 4959#endif
… …
3732 4996
3733 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4997 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3734} 4998}
3735 4999
3736void 5000void
3737ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5001ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3738{ 5002{
3739 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5003 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3740 5004
3741 if (expect_false (!once)) 5005 if (expect_false (!once))
3742 { 5006 {
… …
3763} 5027}
3764 5028
3765/*****************************************************************************/ 5029/*****************************************************************************/
3766 5030
3767#if EV_WALK_ENABLE 5031#if EV_WALK_ENABLE
5032ecb_cold
3768void 5033void
3769ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5034ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3770{ 5035{
3771 int i, j; 5036 int i, j;
3772 ev_watcher_list *wl, *wn; 5037 ev_watcher_list *wl, *wn;
3773 5038
3774 if (types & (EV_IO | EV_EMBED)) 5039 if (types & (EV_IO | EV_EMBED))
… …
3817 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5082 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3818#endif 5083#endif
3819 5084
3820#if EV_IDLE_ENABLE 5085#if EV_IDLE_ENABLE
3821 if (types & EV_IDLE) 5086 if (types & EV_IDLE)
3822 for (j = NUMPRI; i--; ) 5087 for (j = NUMPRI; j--; )
3823 for (i = idlecnt [j]; i--; ) 5088 for (i = idlecnt [j]; i--; )
3824 cb (EV_A_ EV_IDLE, idles [j][i]); 5089 cb (EV_A_ EV_IDLE, idles [j][i]);
3825#endif 5090#endif
3826 5091
3827#if EV_FORK_ENABLE 5092#if EV_FORK_ENABLE
… …
3880 5145
3881#if EV_MULTIPLICITY 5146#if EV_MULTIPLICITY
3882 #include "ev_wrap.h" 5147 #include "ev_wrap.h"
3883#endif 5148#endif
3884 5149
3885EV_CPP(})
3886

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