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Comparing libev/ev.c (file contents):
Revision 1.372 by root, Wed Feb 16 08:02:50 2011 UTC vs.
Revision 1.469 by root, Fri Sep 5 16:21:19 2014 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) 2007,2008,2009,2010,2011,2012,2013 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 *
… …
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>
162#include <stdlib.h> 167#include <stdlib.h>
163#include <string.h> 168#include <string.h>
164#include <fcntl.h> 169#include <fcntl.h>
165#include <stddef.h> 170#include <stddef.h>
166 171
… …
178# include EV_H 183# include EV_H
179#else 184#else
180# include "ev.h" 185# include "ev.h"
181#endif 186#endif
182 187
183EV_CPP(extern "C" {) 188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
184 198
185#ifndef _WIN32 199#ifndef _WIN32
186# include <sys/time.h> 200# include <sys/time.h>
187# include <sys/wait.h> 201# include <sys/wait.h>
188# include <unistd.h> 202# include <unistd.h>
189#else 203#else
190# include <io.h> 204# include <io.h>
191# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
192# include <windows.h> 207# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
195# endif 210# endif
196# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
205#define _DARWIN_UNLIMITED_SELECT 1 220#define _DARWIN_UNLIMITED_SELECT 1
206 221
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
208 223
209/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 225#if defined EV_NSIG
211/* use what's provided */ 226/* use what's provided */
212#elif defined (NSIG) 227#elif defined NSIG
213# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 229#elif defined _NSIG
215# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 231#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 233#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 237#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 239#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 243#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 245#else
231# error "unable to find value for NSIG, please report" 246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
232/* to make it compile regardless, just remove the above line, */ 247#endif
233/* but consider reporting it, too! :) */ 248
234# define EV_NSIG 65 249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
235#endif 251#endif
236 252
237#ifndef EV_USE_CLOCK_SYSCALL 253#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 256# else
241# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
242# endif 258# endif
243#endif 259#endif
244 260
245#ifndef EV_USE_MONOTONIC 261#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 262# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 263# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 264# else
249# define EV_USE_MONOTONIC 0 265# define EV_USE_MONOTONIC 0
250# endif 266# endif
251#endif 267#endif
… …
338 354
339#ifndef EV_HEAP_CACHE_AT 355#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 356# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 357#endif
342 358
359#ifdef ANDROID
360/* supposedly, android doesn't typedef fd_mask */
361# undef EV_USE_SELECT
362# define EV_USE_SELECT 0
363/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
364# undef EV_USE_CLOCK_SYSCALL
365# define EV_USE_CLOCK_SYSCALL 0
366#endif
367
368/* aix's poll.h seems to cause lots of trouble */
369#ifdef _AIX
370/* AIX has a completely broken poll.h header */
371# undef EV_USE_POLL
372# define EV_USE_POLL 0
373#endif
374
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 375/* 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. */ 376/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 377#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 378# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 379# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 380# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 381# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 382# define EV_USE_MONOTONIC 1
351# else 383# else
… …
354# endif 386# endif
355#endif 387#endif
356 388
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 389/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 390
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 391#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 392# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 393# define EV_USE_MONOTONIC 0
368#endif 394#endif
369 395
… …
377# define EV_USE_INOTIFY 0 403# define EV_USE_INOTIFY 0
378#endif 404#endif
379 405
380#if !EV_USE_NANOSLEEP 406#if !EV_USE_NANOSLEEP
381/* hp-ux has it in sys/time.h, which we unconditionally include above */ 407/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux) 408# if !defined _WIN32 && !defined __hpux
383# include <sys/select.h> 409# include <sys/select.h>
384# endif 410# endif
385#endif 411#endif
386 412
387#if EV_USE_INOTIFY 413#if EV_USE_INOTIFY
… …
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 416/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 417# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 418# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 419# define EV_USE_INOTIFY 0
394# endif 420# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 421#endif
400 422
401#if EV_USE_EVENTFD 423#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 424/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 425# include <stdint.h>
… …
443#else 465#else
444# define EV_FREQUENT_CHECK do { } while (0) 466# define EV_FREQUENT_CHECK do { } while (0)
445#endif 467#endif
446 468
447/* 469/*
448 * This is used to avoid floating point rounding problems. 470 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 471 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 472 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 473#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
474/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 475
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 476#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 477#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 478
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 479#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 480#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 481
482/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
483/* ECB.H BEGIN */
484/*
485 * libecb - http://software.schmorp.de/pkg/libecb
486 *
487 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
488 * Copyright (©) 2011 Emanuele Giaquinta
489 * All rights reserved.
490 *
491 * Redistribution and use in source and binary forms, with or without modifica-
492 * tion, are permitted provided that the following conditions are met:
493 *
494 * 1. Redistributions of source code must retain the above copyright notice,
495 * this list of conditions and the following disclaimer.
496 *
497 * 2. Redistributions in binary form must reproduce the above copyright
498 * notice, this list of conditions and the following disclaimer in the
499 * documentation and/or other materials provided with the distribution.
500 *
501 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
502 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
503 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
504 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
505 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
506 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
507 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
508 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
509 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
510 * OF THE POSSIBILITY OF SUCH DAMAGE.
511 *
512 * Alternatively, the contents of this file may be used under the terms of
513 * the GNU General Public License ("GPL") version 2 or any later version,
514 * in which case the provisions of the GPL are applicable instead of
515 * the above. If you wish to allow the use of your version of this file
516 * only under the terms of the GPL and not to allow others to use your
517 * version of this file under the BSD license, indicate your decision
518 * by deleting the provisions above and replace them with the notice
519 * and other provisions required by the GPL. If you do not delete the
520 * provisions above, a recipient may use your version of this file under
521 * either the BSD or the GPL.
522 */
523
524#ifndef ECB_H
525#define ECB_H
526
527/* 16 bits major, 16 bits minor */
528#define ECB_VERSION 0x00010003
529
530#ifdef _WIN32
531 typedef signed char int8_t;
532 typedef unsigned char uint8_t;
533 typedef signed short int16_t;
534 typedef unsigned short uint16_t;
535 typedef signed int int32_t;
536 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 537 #if __GNUC__
464# define expect(expr,value) __builtin_expect ((expr),(value)) 538 typedef signed long long int64_t;
465# define noinline __attribute__ ((noinline)) 539 typedef unsigned long long uint64_t;
540 #else /* _MSC_VER || __BORLANDC__ */
541 typedef signed __int64 int64_t;
542 typedef unsigned __int64 uint64_t;
543 #endif
544 #ifdef _WIN64
545 #define ECB_PTRSIZE 8
546 typedef uint64_t uintptr_t;
547 typedef int64_t intptr_t;
548 #else
549 #define ECB_PTRSIZE 4
550 typedef uint32_t uintptr_t;
551 typedef int32_t intptr_t;
552 #endif
466#else 553#else
467# define expect(expr,value) (expr) 554 #include <inttypes.h>
468# define noinline 555 #if UINTMAX_MAX > 0xffffffffU
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 556 #define ECB_PTRSIZE 8
470# define inline 557 #else
558 #define ECB_PTRSIZE 4
559 #endif
471# endif 560#endif
561
562/* work around x32 idiocy by defining proper macros */
563#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
564 #if _ILP32
565 #define ECB_AMD64_X32 1
566 #else
567 #define ECB_AMD64 1
472#endif 568 #endif
569#endif
473 570
571/* many compilers define _GNUC_ to some versions but then only implement
572 * what their idiot authors think are the "more important" extensions,
573 * causing enormous grief in return for some better fake benchmark numbers.
574 * or so.
575 * we try to detect these and simply assume they are not gcc - if they have
576 * an issue with that they should have done it right in the first place.
577 */
578#ifndef ECB_GCC_VERSION
579 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
580 #define ECB_GCC_VERSION(major,minor) 0
581 #else
582 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
583 #endif
584#endif
585
586#define ECB_CPP (__cplusplus+0)
587#define ECB_CPP11 (__cplusplus >= 201103L)
588
589#if ECB_CPP
590 #define ECB_C 0
591 #define ECB_STDC_VERSION 0
592#else
593 #define ECB_C 1
594 #define ECB_STDC_VERSION __STDC_VERSION__
595#endif
596
597#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
598#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
599
600#if ECB_CPP
601 #define ECB_EXTERN_C extern "C"
602 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
603 #define ECB_EXTERN_C_END }
604#else
605 #define ECB_EXTERN_C extern
606 #define ECB_EXTERN_C_BEG
607 #define ECB_EXTERN_C_END
608#endif
609
610/*****************************************************************************/
611
612/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
613/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
614
615#if ECB_NO_THREADS
616 #define ECB_NO_SMP 1
617#endif
618
619#if ECB_NO_SMP
620 #define ECB_MEMORY_FENCE do { } while (0)
621#endif
622
623#ifndef ECB_MEMORY_FENCE
624 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
625 #if __i386 || __i386__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
631 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
632 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
633 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
635 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
636 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
637 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
638 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
639 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
641 #elif __aarch64__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
643 #elif (__sparc || __sparc__) && !__sparcv8
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
645 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
647 #elif defined __s390__ || defined __s390x__
648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
649 #elif defined __mips__
650 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
651 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
652 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
653 #elif defined __alpha__
654 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
655 #elif defined __hppa__
656 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif defined __ia64__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
660 #elif defined __m68k__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
662 #elif defined __m88k__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
664 #elif defined __sh__
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
666 #endif
667 #endif
668#endif
669
670#ifndef ECB_MEMORY_FENCE
671 #if ECB_GCC_VERSION(4,7)
672 /* see comment below (stdatomic.h) about the C11 memory model. */
673 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
674 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
675 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
676
677 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
678 * without risking compile time errors with other compilers. We *could*
679 * define our own ecb_clang_has_feature, but I just can't be bothered to work
680 * around this shit time and again.
681 * #elif defined __clang && __has_feature (cxx_atomic)
682 * // see comment below (stdatomic.h) about the C11 memory model.
683 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
684 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
685 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
686 */
687
688 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
689 #define ECB_MEMORY_FENCE __sync_synchronize ()
690 #elif _MSC_VER >= 1500 /* VC++ 2008 */
691 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
692 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
693 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
694 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
695 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
696 #elif _MSC_VER >= 1400 /* VC++ 2005 */
697 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
698 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
699 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
700 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
701 #elif defined _WIN32
702 #include <WinNT.h>
703 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
704 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
705 #include <mbarrier.h>
706 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
707 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
708 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
709 #elif __xlC__
710 #define ECB_MEMORY_FENCE __sync ()
711 #endif
712#endif
713
714#ifndef ECB_MEMORY_FENCE
715 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
716 /* we assume that these memory fences work on all variables/all memory accesses, */
717 /* not just C11 atomics and atomic accesses */
718 #include <stdatomic.h>
719 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
720 /* any fence other than seq_cst, which isn't very efficient for us. */
721 /* Why that is, we don't know - either the C11 memory model is quite useless */
722 /* for most usages, or gcc and clang have a bug */
723 /* I *currently* lean towards the latter, and inefficiently implement */
724 /* all three of ecb's fences as a seq_cst fence */
725 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
726 /* for all __atomic_thread_fence's except seq_cst */
727 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
728 #endif
729#endif
730
731#ifndef ECB_MEMORY_FENCE
732 #if !ECB_AVOID_PTHREADS
733 /*
734 * if you get undefined symbol references to pthread_mutex_lock,
735 * or failure to find pthread.h, then you should implement
736 * the ECB_MEMORY_FENCE operations for your cpu/compiler
737 * OR provide pthread.h and link against the posix thread library
738 * of your system.
739 */
740 #include <pthread.h>
741 #define ECB_NEEDS_PTHREADS 1
742 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
743
744 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
745 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
746 #endif
747#endif
748
749#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
750 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
751#endif
752
753#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
754 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
755#endif
756
757/*****************************************************************************/
758
759#if __cplusplus
760 #define ecb_inline static inline
761#elif ECB_GCC_VERSION(2,5)
762 #define ecb_inline static __inline__
763#elif ECB_C99
764 #define ecb_inline static inline
765#else
766 #define ecb_inline static
767#endif
768
769#if ECB_GCC_VERSION(3,3)
770 #define ecb_restrict __restrict__
771#elif ECB_C99
772 #define ecb_restrict restrict
773#else
774 #define ecb_restrict
775#endif
776
777typedef int ecb_bool;
778
779#define ECB_CONCAT_(a, b) a ## b
780#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
781#define ECB_STRINGIFY_(a) # a
782#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
783
784#define ecb_function_ ecb_inline
785
786#if ECB_GCC_VERSION(3,1)
787 #define ecb_attribute(attrlist) __attribute__(attrlist)
788 #define ecb_is_constant(expr) __builtin_constant_p (expr)
789 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
790 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
791#else
792 #define ecb_attribute(attrlist)
793
794 /* possible C11 impl for integral types
795 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
796 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
797
798 #define ecb_is_constant(expr) 0
799 #define ecb_expect(expr,value) (expr)
800 #define ecb_prefetch(addr,rw,locality)
801#endif
802
803/* no emulation for ecb_decltype */
804#if ECB_GCC_VERSION(4,5)
805 #define ecb_decltype(x) __decltype(x)
806#elif ECB_GCC_VERSION(3,0)
807 #define ecb_decltype(x) __typeof(x)
808#endif
809
810#if _MSC_VER >= 1300
811 #define ecb_deprecated __declspec(deprecated)
812#else
813 #define ecb_deprecated ecb_attribute ((__deprecated__))
814#endif
815
816#define ecb_noinline ecb_attribute ((__noinline__))
817#define ecb_unused ecb_attribute ((__unused__))
818#define ecb_const ecb_attribute ((__const__))
819#define ecb_pure ecb_attribute ((__pure__))
820
821/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
822#if ECB_C11
823 #define ecb_noreturn _Noreturn
824#else
825 #define ecb_noreturn ecb_attribute ((__noreturn__))
826#endif
827
828#if ECB_GCC_VERSION(4,3)
829 #define ecb_artificial ecb_attribute ((__artificial__))
830 #define ecb_hot ecb_attribute ((__hot__))
831 #define ecb_cold ecb_attribute ((__cold__))
832#else
833 #define ecb_artificial
834 #define ecb_hot
835 #define ecb_cold
836#endif
837
838/* put around conditional expressions if you are very sure that the */
839/* expression is mostly true or mostly false. note that these return */
840/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 841#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 842#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
843/* for compatibility to the rest of the world */
844#define ecb_likely(expr) ecb_expect_true (expr)
845#define ecb_unlikely(expr) ecb_expect_false (expr)
846
847/* count trailing zero bits and count # of one bits */
848#if ECB_GCC_VERSION(3,4)
849 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
850 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
851 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
852 #define ecb_ctz32(x) __builtin_ctz (x)
853 #define ecb_ctz64(x) __builtin_ctzll (x)
854 #define ecb_popcount32(x) __builtin_popcount (x)
855 /* no popcountll */
856#else
857 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
858 ecb_function_ int
859 ecb_ctz32 (uint32_t x)
860 {
861 int r = 0;
862
863 x &= ~x + 1; /* this isolates the lowest bit */
864
865#if ECB_branchless_on_i386
866 r += !!(x & 0xaaaaaaaa) << 0;
867 r += !!(x & 0xcccccccc) << 1;
868 r += !!(x & 0xf0f0f0f0) << 2;
869 r += !!(x & 0xff00ff00) << 3;
870 r += !!(x & 0xffff0000) << 4;
871#else
872 if (x & 0xaaaaaaaa) r += 1;
873 if (x & 0xcccccccc) r += 2;
874 if (x & 0xf0f0f0f0) r += 4;
875 if (x & 0xff00ff00) r += 8;
876 if (x & 0xffff0000) r += 16;
877#endif
878
879 return r;
880 }
881
882 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
883 ecb_function_ int
884 ecb_ctz64 (uint64_t x)
885 {
886 int shift = x & 0xffffffffU ? 0 : 32;
887 return ecb_ctz32 (x >> shift) + shift;
888 }
889
890 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
891 ecb_function_ int
892 ecb_popcount32 (uint32_t x)
893 {
894 x -= (x >> 1) & 0x55555555;
895 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
896 x = ((x >> 4) + x) & 0x0f0f0f0f;
897 x *= 0x01010101;
898
899 return x >> 24;
900 }
901
902 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
903 ecb_function_ int ecb_ld32 (uint32_t x)
904 {
905 int r = 0;
906
907 if (x >> 16) { x >>= 16; r += 16; }
908 if (x >> 8) { x >>= 8; r += 8; }
909 if (x >> 4) { x >>= 4; r += 4; }
910 if (x >> 2) { x >>= 2; r += 2; }
911 if (x >> 1) { r += 1; }
912
913 return r;
914 }
915
916 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
917 ecb_function_ int ecb_ld64 (uint64_t x)
918 {
919 int r = 0;
920
921 if (x >> 32) { x >>= 32; r += 32; }
922
923 return r + ecb_ld32 (x);
924 }
925#endif
926
927ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
928ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
929ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
930ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
931
932ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
933ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
934{
935 return ( (x * 0x0802U & 0x22110U)
936 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
937}
938
939ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
940ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
941{
942 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
943 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
944 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
945 x = ( x >> 8 ) | ( x << 8);
946
947 return x;
948}
949
950ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
951ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
952{
953 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
954 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
955 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
956 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
957 x = ( x >> 16 ) | ( x << 16);
958
959 return x;
960}
961
962/* popcount64 is only available on 64 bit cpus as gcc builtin */
963/* so for this version we are lazy */
964ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
965ecb_function_ int
966ecb_popcount64 (uint64_t x)
967{
968 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
969}
970
971ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
972ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
973ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
974ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
975ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
976ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
977ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
978ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
979
980ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
981ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
982ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
983ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
984ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
985ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
986ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
987ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
988
989#if ECB_GCC_VERSION(4,3)
990 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
991 #define ecb_bswap32(x) __builtin_bswap32 (x)
992 #define ecb_bswap64(x) __builtin_bswap64 (x)
993#else
994 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
995 ecb_function_ uint16_t
996 ecb_bswap16 (uint16_t x)
997 {
998 return ecb_rotl16 (x, 8);
999 }
1000
1001 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
1002 ecb_function_ uint32_t
1003 ecb_bswap32 (uint32_t x)
1004 {
1005 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1006 }
1007
1008 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
1009 ecb_function_ uint64_t
1010 ecb_bswap64 (uint64_t x)
1011 {
1012 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1013 }
1014#endif
1015
1016#if ECB_GCC_VERSION(4,5)
1017 #define ecb_unreachable() __builtin_unreachable ()
1018#else
1019 /* this seems to work fine, but gcc always emits a warning for it :/ */
1020 ecb_inline void ecb_unreachable (void) ecb_noreturn;
1021 ecb_inline void ecb_unreachable (void) { }
1022#endif
1023
1024/* try to tell the compiler that some condition is definitely true */
1025#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1026
1027ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
1028ecb_inline unsigned char
1029ecb_byteorder_helper (void)
1030{
1031 /* the union code still generates code under pressure in gcc, */
1032 /* but less than using pointers, and always seems to */
1033 /* successfully return a constant. */
1034 /* the reason why we have this horrible preprocessor mess */
1035 /* is to avoid it in all cases, at least on common architectures */
1036 /* or when using a recent enough gcc version (>= 4.6) */
1037#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1038 return 0x44;
1039#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1040 return 0x44;
1041#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1042 return 0x11;
1043#else
1044 union
1045 {
1046 uint32_t i;
1047 uint8_t c;
1048 } u = { 0x11223344 };
1049 return u.c;
1050#endif
1051}
1052
1053ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1054ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1055ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1056ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1057
1058#if ECB_GCC_VERSION(3,0) || ECB_C99
1059 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1060#else
1061 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1062#endif
1063
1064#if __cplusplus
1065 template<typename T>
1066 static inline T ecb_div_rd (T val, T div)
1067 {
1068 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1069 }
1070 template<typename T>
1071 static inline T ecb_div_ru (T val, T div)
1072 {
1073 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1074 }
1075#else
1076 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1077 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1078#endif
1079
1080#if ecb_cplusplus_does_not_suck
1081 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1082 template<typename T, int N>
1083 static inline int ecb_array_length (const T (&arr)[N])
1084 {
1085 return N;
1086 }
1087#else
1088 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1089#endif
1090
1091/*******************************************************************************/
1092/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1093
1094/* basically, everything uses "ieee pure-endian" floating point numbers */
1095/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1096#if 0 \
1097 || __i386 || __i386__ \
1098 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1099 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1100 || defined __s390__ || defined __s390x__ \
1101 || defined __mips__ \
1102 || defined __alpha__ \
1103 || defined __hppa__ \
1104 || defined __ia64__ \
1105 || defined __m68k__ \
1106 || defined __m88k__ \
1107 || defined __sh__ \
1108 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1109 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1110 || defined __aarch64__
1111 #define ECB_STDFP 1
1112 #include <string.h> /* for memcpy */
1113#else
1114 #define ECB_STDFP 0
1115#endif
1116
1117#ifndef ECB_NO_LIBM
1118
1119 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1120
1121 /* only the oldest of old doesn't have this one. solaris. */
1122 #ifdef INFINITY
1123 #define ECB_INFINITY INFINITY
1124 #else
1125 #define ECB_INFINITY HUGE_VAL
1126 #endif
1127
1128 #ifdef NAN
1129 #define ECB_NAN NAN
1130 #else
1131 #define ECB_NAN ECB_INFINITY
1132 #endif
1133
1134 /* converts an ieee half/binary16 to a float */
1135 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1136 ecb_function_ float
1137 ecb_binary16_to_float (uint16_t x)
1138 {
1139 int e = (x >> 10) & 0x1f;
1140 int m = x & 0x3ff;
1141 float r;
1142
1143 if (!e ) r = ldexpf (m , -24);
1144 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1145 else if (m ) r = ECB_NAN;
1146 else r = ECB_INFINITY;
1147
1148 return x & 0x8000 ? -r : r;
1149 }
1150
1151 /* convert a float to ieee single/binary32 */
1152 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1153 ecb_function_ uint32_t
1154 ecb_float_to_binary32 (float x)
1155 {
1156 uint32_t r;
1157
1158 #if ECB_STDFP
1159 memcpy (&r, &x, 4);
1160 #else
1161 /* slow emulation, works for anything but -0 */
1162 uint32_t m;
1163 int e;
1164
1165 if (x == 0e0f ) return 0x00000000U;
1166 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1167 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1168 if (x != x ) return 0x7fbfffffU;
1169
1170 m = frexpf (x, &e) * 0x1000000U;
1171
1172 r = m & 0x80000000U;
1173
1174 if (r)
1175 m = -m;
1176
1177 if (e <= -126)
1178 {
1179 m &= 0xffffffU;
1180 m >>= (-125 - e);
1181 e = -126;
1182 }
1183
1184 r |= (e + 126) << 23;
1185 r |= m & 0x7fffffU;
1186 #endif
1187
1188 return r;
1189 }
1190
1191 /* converts an ieee single/binary32 to a float */
1192 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1193 ecb_function_ float
1194 ecb_binary32_to_float (uint32_t x)
1195 {
1196 float r;
1197
1198 #if ECB_STDFP
1199 memcpy (&r, &x, 4);
1200 #else
1201 /* emulation, only works for normals and subnormals and +0 */
1202 int neg = x >> 31;
1203 int e = (x >> 23) & 0xffU;
1204
1205 x &= 0x7fffffU;
1206
1207 if (e)
1208 x |= 0x800000U;
1209 else
1210 e = 1;
1211
1212 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1213 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1214
1215 r = neg ? -r : r;
1216 #endif
1217
1218 return r;
1219 }
1220
1221 /* convert a double to ieee double/binary64 */
1222 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1223 ecb_function_ uint64_t
1224 ecb_double_to_binary64 (double x)
1225 {
1226 uint64_t r;
1227
1228 #if ECB_STDFP
1229 memcpy (&r, &x, 8);
1230 #else
1231 /* slow emulation, works for anything but -0 */
1232 uint64_t m;
1233 int e;
1234
1235 if (x == 0e0 ) return 0x0000000000000000U;
1236 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1237 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1238 if (x != x ) return 0X7ff7ffffffffffffU;
1239
1240 m = frexp (x, &e) * 0x20000000000000U;
1241
1242 r = m & 0x8000000000000000;;
1243
1244 if (r)
1245 m = -m;
1246
1247 if (e <= -1022)
1248 {
1249 m &= 0x1fffffffffffffU;
1250 m >>= (-1021 - e);
1251 e = -1022;
1252 }
1253
1254 r |= ((uint64_t)(e + 1022)) << 52;
1255 r |= m & 0xfffffffffffffU;
1256 #endif
1257
1258 return r;
1259 }
1260
1261 /* converts an ieee double/binary64 to a double */
1262 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1263 ecb_function_ double
1264 ecb_binary64_to_double (uint64_t x)
1265 {
1266 double r;
1267
1268 #if ECB_STDFP
1269 memcpy (&r, &x, 8);
1270 #else
1271 /* emulation, only works for normals and subnormals and +0 */
1272 int neg = x >> 63;
1273 int e = (x >> 52) & 0x7ffU;
1274
1275 x &= 0xfffffffffffffU;
1276
1277 if (e)
1278 x |= 0x10000000000000U;
1279 else
1280 e = 1;
1281
1282 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1283 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1284
1285 r = neg ? -r : r;
1286 #endif
1287
1288 return r;
1289 }
1290
1291#endif
1292
1293#endif
1294
1295/* ECB.H END */
1296
1297#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1298/* if your architecture doesn't need memory fences, e.g. because it is
1299 * single-cpu/core, or if you use libev in a project that doesn't use libev
1300 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1301 * libev, in which cases the memory fences become nops.
1302 * alternatively, you can remove this #error and link against libpthread,
1303 * which will then provide the memory fences.
1304 */
1305# error "memory fences not defined for your architecture, please report"
1306#endif
1307
1308#ifndef ECB_MEMORY_FENCE
1309# define ECB_MEMORY_FENCE do { } while (0)
1310# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1311# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1312#endif
1313
1314#define expect_false(cond) ecb_expect_false (cond)
1315#define expect_true(cond) ecb_expect_true (cond)
1316#define noinline ecb_noinline
1317
476#define inline_size static inline 1318#define inline_size ecb_inline
477 1319
478#if EV_FEATURE_CODE 1320#if EV_FEATURE_CODE
479# define inline_speed static inline 1321# define inline_speed ecb_inline
480#else 1322#else
481# define inline_speed static noinline 1323# define inline_speed static noinline
482#endif 1324#endif
483 1325
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1326#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
523# include "ev_win32.c" 1365# include "ev_win32.c"
524#endif 1366#endif
525 1367
526/*****************************************************************************/ 1368/*****************************************************************************/
527 1369
1370/* define a suitable floor function (only used by periodics atm) */
1371
1372#if EV_USE_FLOOR
1373# include <math.h>
1374# define ev_floor(v) floor (v)
1375#else
1376
1377#include <float.h>
1378
1379/* a floor() replacement function, should be independent of ev_tstamp type */
1380static ev_tstamp noinline
1381ev_floor (ev_tstamp v)
1382{
1383 /* the choice of shift factor is not terribly important */
1384#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1385 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1386#else
1387 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1388#endif
1389
1390 /* argument too large for an unsigned long? */
1391 if (expect_false (v >= shift))
1392 {
1393 ev_tstamp f;
1394
1395 if (v == v - 1.)
1396 return v; /* very large number */
1397
1398 f = shift * ev_floor (v * (1. / shift));
1399 return f + ev_floor (v - f);
1400 }
1401
1402 /* special treatment for negative args? */
1403 if (expect_false (v < 0.))
1404 {
1405 ev_tstamp f = -ev_floor (-v);
1406
1407 return f - (f == v ? 0 : 1);
1408 }
1409
1410 /* fits into an unsigned long */
1411 return (unsigned long)v;
1412}
1413
1414#endif
1415
1416/*****************************************************************************/
1417
528#ifdef __linux 1418#ifdef __linux
529# include <sys/utsname.h> 1419# include <sys/utsname.h>
530#endif 1420#endif
531 1421
532static unsigned int noinline 1422static unsigned int noinline ecb_cold
533ev_linux_version (void) 1423ev_linux_version (void)
534{ 1424{
535#ifdef __linux 1425#ifdef __linux
536 unsigned int v = 0; 1426 unsigned int v = 0;
537 struct utsname buf; 1427 struct utsname buf;
… …
566} 1456}
567 1457
568/*****************************************************************************/ 1458/*****************************************************************************/
569 1459
570#if EV_AVOID_STDIO 1460#if EV_AVOID_STDIO
571static void noinline 1461static void noinline ecb_cold
572ev_printerr (const char *msg) 1462ev_printerr (const char *msg)
573{ 1463{
574 write (STDERR_FILENO, msg, strlen (msg)); 1464 write (STDERR_FILENO, msg, strlen (msg));
575} 1465}
576#endif 1466#endif
577 1467
578static void (*syserr_cb)(const char *msg); 1468static void (*syserr_cb)(const char *msg) EV_THROW;
579 1469
580void 1470void ecb_cold
581ev_set_syserr_cb (void (*cb)(const char *msg)) 1471ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
582{ 1472{
583 syserr_cb = cb; 1473 syserr_cb = cb;
584} 1474}
585 1475
586static void noinline 1476static void noinline ecb_cold
587ev_syserr (const char *msg) 1477ev_syserr (const char *msg)
588{ 1478{
589 if (!msg) 1479 if (!msg)
590 msg = "(libev) system error"; 1480 msg = "(libev) system error";
591 1481
… …
604 abort (); 1494 abort ();
605 } 1495 }
606} 1496}
607 1497
608static void * 1498static void *
609ev_realloc_emul (void *ptr, long size) 1499ev_realloc_emul (void *ptr, long size) EV_THROW
610{ 1500{
611#if __GLIBC__
612 return realloc (ptr, size);
613#else
614 /* some systems, notably openbsd and darwin, fail to properly 1501 /* some systems, notably openbsd and darwin, fail to properly
615 * implement realloc (x, 0) (as required by both ansi c-89 and 1502 * implement realloc (x, 0) (as required by both ansi c-89 and
616 * the single unix specification, so work around them here. 1503 * the single unix specification, so work around them here.
1504 * recently, also (at least) fedora and debian started breaking it,
1505 * despite documenting it otherwise.
617 */ 1506 */
618 1507
619 if (size) 1508 if (size)
620 return realloc (ptr, size); 1509 return realloc (ptr, size);
621 1510
622 free (ptr); 1511 free (ptr);
623 return 0; 1512 return 0;
624#endif
625} 1513}
626 1514
627static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1515static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
628 1516
629void 1517void ecb_cold
630ev_set_allocator (void *(*cb)(void *ptr, long size)) 1518ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
631{ 1519{
632 alloc = cb; 1520 alloc = cb;
633} 1521}
634 1522
635inline_speed void * 1523inline_speed void *
… …
723 #undef VAR 1611 #undef VAR
724 }; 1612 };
725 #include "ev_wrap.h" 1613 #include "ev_wrap.h"
726 1614
727 static struct ev_loop default_loop_struct; 1615 static struct ev_loop default_loop_struct;
728 struct ev_loop *ev_default_loop_ptr; 1616 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
729 1617
730#else 1618#else
731 1619
732 ev_tstamp ev_rt_now; 1620 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
733 #define VAR(name,decl) static decl; 1621 #define VAR(name,decl) static decl;
734 #include "ev_vars.h" 1622 #include "ev_vars.h"
735 #undef VAR 1623 #undef VAR
736 1624
737 static int ev_default_loop_ptr; 1625 static int ev_default_loop_ptr;
… …
752 1640
753/*****************************************************************************/ 1641/*****************************************************************************/
754 1642
755#ifndef EV_HAVE_EV_TIME 1643#ifndef EV_HAVE_EV_TIME
756ev_tstamp 1644ev_tstamp
757ev_time (void) 1645ev_time (void) EV_THROW
758{ 1646{
759#if EV_USE_REALTIME 1647#if EV_USE_REALTIME
760 if (expect_true (have_realtime)) 1648 if (expect_true (have_realtime))
761 { 1649 {
762 struct timespec ts; 1650 struct timespec ts;
… …
786 return ev_time (); 1674 return ev_time ();
787} 1675}
788 1676
789#if EV_MULTIPLICITY 1677#if EV_MULTIPLICITY
790ev_tstamp 1678ev_tstamp
791ev_now (EV_P) 1679ev_now (EV_P) EV_THROW
792{ 1680{
793 return ev_rt_now; 1681 return ev_rt_now;
794} 1682}
795#endif 1683#endif
796 1684
797void 1685void
798ev_sleep (ev_tstamp delay) 1686ev_sleep (ev_tstamp delay) EV_THROW
799{ 1687{
800 if (delay > 0.) 1688 if (delay > 0.)
801 { 1689 {
802#if EV_USE_NANOSLEEP 1690#if EV_USE_NANOSLEEP
803 struct timespec ts; 1691 struct timespec ts;
804 1692
805 EV_TS_SET (ts, delay); 1693 EV_TS_SET (ts, delay);
806 nanosleep (&ts, 0); 1694 nanosleep (&ts, 0);
807#elif defined(_WIN32) 1695#elif defined _WIN32
808 Sleep ((unsigned long)(delay * 1e3)); 1696 Sleep ((unsigned long)(delay * 1e3));
809#else 1697#else
810 struct timeval tv; 1698 struct timeval tv;
811 1699
812 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1700 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
816 select (0, 0, 0, 0, &tv); 1704 select (0, 0, 0, 0, &tv);
817#endif 1705#endif
818 } 1706 }
819} 1707}
820 1708
821inline_speed int
822ev_timeout_to_ms (ev_tstamp timeout)
823{
824 int ms = timeout * 1000. + .999999;
825
826 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
827}
828
829/*****************************************************************************/ 1709/*****************************************************************************/
830 1710
831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1711#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
832 1712
833/* find a suitable new size for the given array, */ 1713/* find a suitable new size for the given array, */
… …
839 1719
840 do 1720 do
841 ncur <<= 1; 1721 ncur <<= 1;
842 while (cnt > ncur); 1722 while (cnt > ncur);
843 1723
844 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1724 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1725 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
846 { 1726 {
847 ncur *= elem; 1727 ncur *= elem;
848 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1728 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
849 ncur = ncur - sizeof (void *) * 4; 1729 ncur = ncur - sizeof (void *) * 4;
… …
851 } 1731 }
852 1732
853 return ncur; 1733 return ncur;
854} 1734}
855 1735
856static noinline void * 1736static void * noinline ecb_cold
857array_realloc (int elem, void *base, int *cur, int cnt) 1737array_realloc (int elem, void *base, int *cur, int cnt)
858{ 1738{
859 *cur = array_nextsize (elem, *cur, cnt); 1739 *cur = array_nextsize (elem, *cur, cnt);
860 return ev_realloc (base, elem * *cur); 1740 return ev_realloc (base, elem * *cur);
861} 1741}
… …
864 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1744 memset ((void *)(base), 0, sizeof (*(base)) * (count))
865 1745
866#define array_needsize(type,base,cur,cnt,init) \ 1746#define array_needsize(type,base,cur,cnt,init) \
867 if (expect_false ((cnt) > (cur))) \ 1747 if (expect_false ((cnt) > (cur))) \
868 { \ 1748 { \
869 int ocur_ = (cur); \ 1749 int ecb_unused ocur_ = (cur); \
870 (base) = (type *)array_realloc \ 1750 (base) = (type *)array_realloc \
871 (sizeof (type), (base), &(cur), (cnt)); \ 1751 (sizeof (type), (base), &(cur), (cnt)); \
872 init ((base) + (ocur_), (cur) - ocur_); \ 1752 init ((base) + (ocur_), (cur) - ocur_); \
873 } 1753 }
874 1754
… …
892pendingcb (EV_P_ ev_prepare *w, int revents) 1772pendingcb (EV_P_ ev_prepare *w, int revents)
893{ 1773{
894} 1774}
895 1775
896void noinline 1776void noinline
897ev_feed_event (EV_P_ void *w, int revents) 1777ev_feed_event (EV_P_ void *w, int revents) EV_THROW
898{ 1778{
899 W w_ = (W)w; 1779 W w_ = (W)w;
900 int pri = ABSPRI (w_); 1780 int pri = ABSPRI (w_);
901 1781
902 if (expect_false (w_->pending)) 1782 if (expect_false (w_->pending))
… …
906 w_->pending = ++pendingcnt [pri]; 1786 w_->pending = ++pendingcnt [pri];
907 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1787 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
908 pendings [pri][w_->pending - 1].w = w_; 1788 pendings [pri][w_->pending - 1].w = w_;
909 pendings [pri][w_->pending - 1].events = revents; 1789 pendings [pri][w_->pending - 1].events = revents;
910 } 1790 }
1791
1792 pendingpri = NUMPRI - 1;
911} 1793}
912 1794
913inline_speed void 1795inline_speed void
914feed_reverse (EV_P_ W w) 1796feed_reverse (EV_P_ W w)
915{ 1797{
… …
961 if (expect_true (!anfd->reify)) 1843 if (expect_true (!anfd->reify))
962 fd_event_nocheck (EV_A_ fd, revents); 1844 fd_event_nocheck (EV_A_ fd, revents);
963} 1845}
964 1846
965void 1847void
966ev_feed_fd_event (EV_P_ int fd, int revents) 1848ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
967{ 1849{
968 if (fd >= 0 && fd < anfdmax) 1850 if (fd >= 0 && fd < anfdmax)
969 fd_event_nocheck (EV_A_ fd, revents); 1851 fd_event_nocheck (EV_A_ fd, revents);
970} 1852}
971 1853
… …
980 for (i = 0; i < fdchangecnt; ++i) 1862 for (i = 0; i < fdchangecnt; ++i)
981 { 1863 {
982 int fd = fdchanges [i]; 1864 int fd = fdchanges [i];
983 ANFD *anfd = anfds + fd; 1865 ANFD *anfd = anfds + fd;
984 1866
985 if (anfd->reify & EV__IOFDSET) 1867 if (anfd->reify & EV__IOFDSET && anfd->head)
986 { 1868 {
987 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd); 1869 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
988 1870
989 if (handle != anfd->handle) 1871 if (handle != anfd->handle)
990 { 1872 {
… …
1044 fdchanges [fdchangecnt - 1] = fd; 1926 fdchanges [fdchangecnt - 1] = fd;
1045 } 1927 }
1046} 1928}
1047 1929
1048/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1930/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1049inline_speed void 1931inline_speed void ecb_cold
1050fd_kill (EV_P_ int fd) 1932fd_kill (EV_P_ int fd)
1051{ 1933{
1052 ev_io *w; 1934 ev_io *w;
1053 1935
1054 while ((w = (ev_io *)anfds [fd].head)) 1936 while ((w = (ev_io *)anfds [fd].head))
… …
1057 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1939 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1058 } 1940 }
1059} 1941}
1060 1942
1061/* check whether the given fd is actually valid, for error recovery */ 1943/* check whether the given fd is actually valid, for error recovery */
1062inline_size int 1944inline_size int ecb_cold
1063fd_valid (int fd) 1945fd_valid (int fd)
1064{ 1946{
1065#ifdef _WIN32 1947#ifdef _WIN32
1066 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1948 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1067#else 1949#else
1068 return fcntl (fd, F_GETFD) != -1; 1950 return fcntl (fd, F_GETFD) != -1;
1069#endif 1951#endif
1070} 1952}
1071 1953
1072/* called on EBADF to verify fds */ 1954/* called on EBADF to verify fds */
1073static void noinline 1955static void noinline ecb_cold
1074fd_ebadf (EV_P) 1956fd_ebadf (EV_P)
1075{ 1957{
1076 int fd; 1958 int fd;
1077 1959
1078 for (fd = 0; fd < anfdmax; ++fd) 1960 for (fd = 0; fd < anfdmax; ++fd)
… …
1080 if (!fd_valid (fd) && errno == EBADF) 1962 if (!fd_valid (fd) && errno == EBADF)
1081 fd_kill (EV_A_ fd); 1963 fd_kill (EV_A_ fd);
1082} 1964}
1083 1965
1084/* called on ENOMEM in select/poll to kill some fds and retry */ 1966/* called on ENOMEM in select/poll to kill some fds and retry */
1085static void noinline 1967static void noinline ecb_cold
1086fd_enomem (EV_P) 1968fd_enomem (EV_P)
1087{ 1969{
1088 int fd; 1970 int fd;
1089 1971
1090 for (fd = anfdmax; fd--; ) 1972 for (fd = anfdmax; fd--; )
… …
1285 2167
1286/*****************************************************************************/ 2168/*****************************************************************************/
1287 2169
1288#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2170#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1289 2171
1290static void noinline 2172static void noinline ecb_cold
1291evpipe_init (EV_P) 2173evpipe_init (EV_P)
1292{ 2174{
1293 if (!ev_is_active (&pipe_w)) 2175 if (!ev_is_active (&pipe_w))
1294 { 2176 {
2177 int fds [2];
2178
1295# if EV_USE_EVENTFD 2179# if EV_USE_EVENTFD
2180 fds [0] = -1;
1296 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2181 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1297 if (evfd < 0 && errno == EINVAL) 2182 if (fds [1] < 0 && errno == EINVAL)
1298 evfd = eventfd (0, 0); 2183 fds [1] = eventfd (0, 0);
1299 2184
1300 if (evfd >= 0) 2185 if (fds [1] < 0)
2186# endif
1301 { 2187 {
2188 while (pipe (fds))
2189 ev_syserr ("(libev) error creating signal/async pipe");
2190
2191 fd_intern (fds [0]);
2192 }
2193
1302 evpipe [0] = -1; 2194 evpipe [0] = fds [0];
1303 fd_intern (evfd); /* doing it twice doesn't hurt */ 2195
1304 ev_io_set (&pipe_w, evfd, EV_READ); 2196 if (evpipe [1] < 0)
2197 evpipe [1] = fds [1]; /* first call, set write fd */
2198 else
2199 {
2200 /* on subsequent calls, do not change evpipe [1] */
2201 /* so that evpipe_write can always rely on its value. */
2202 /* this branch does not do anything sensible on windows, */
2203 /* so must not be executed on windows */
2204
2205 dup2 (fds [1], evpipe [1]);
2206 close (fds [1]);
2207 }
2208
2209 fd_intern (evpipe [1]);
2210
2211 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2212 ev_io_start (EV_A_ &pipe_w);
2213 ev_unref (EV_A); /* watcher should not keep loop alive */
2214 }
2215}
2216
2217inline_speed void
2218evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2219{
2220 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2221
2222 if (expect_true (*flag))
2223 return;
2224
2225 *flag = 1;
2226 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2227
2228 pipe_write_skipped = 1;
2229
2230 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2231
2232 if (pipe_write_wanted)
2233 {
2234 int old_errno;
2235
2236 pipe_write_skipped = 0;
2237 ECB_MEMORY_FENCE_RELEASE;
2238
2239 old_errno = errno; /* save errno because write will clobber it */
2240
2241#if EV_USE_EVENTFD
2242 if (evpipe [0] < 0)
2243 {
2244 uint64_t counter = 1;
2245 write (evpipe [1], &counter, sizeof (uint64_t));
1305 } 2246 }
1306 else 2247 else
1307# endif 2248#endif
1308 { 2249 {
1309 while (pipe (evpipe)) 2250#ifdef _WIN32
1310 ev_syserr ("(libev) error creating signal/async pipe"); 2251 WSABUF buf;
1311 2252 DWORD sent;
1312 fd_intern (evpipe [0]); 2253 buf.buf = &buf;
1313 fd_intern (evpipe [1]); 2254 buf.len = 1;
1314 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2255 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2256#else
2257 write (evpipe [1], &(evpipe [1]), 1);
2258#endif
1315 } 2259 }
1316
1317 ev_io_start (EV_A_ &pipe_w);
1318 ev_unref (EV_A); /* watcher should not keep loop alive */
1319 }
1320}
1321
1322inline_size void
1323evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1324{
1325 if (!*flag)
1326 {
1327 int old_errno = errno; /* save errno because write might clobber it */
1328 char dummy;
1329
1330 *flag = 1;
1331
1332#if EV_USE_EVENTFD
1333 if (evfd >= 0)
1334 {
1335 uint64_t counter = 1;
1336 write (evfd, &counter, sizeof (uint64_t));
1337 }
1338 else
1339#endif
1340 /* win32 people keep sending patches that change this write() to send() */
1341 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1342 /* so when you think this write should be a send instead, please find out */
1343 /* where your send() is from - it's definitely not the microsoft send, and */
1344 /* tell me. thank you. */
1345 write (evpipe [1], &dummy, 1);
1346 2260
1347 errno = old_errno; 2261 errno = old_errno;
1348 } 2262 }
1349} 2263}
1350 2264
… …
1353static void 2267static void
1354pipecb (EV_P_ ev_io *iow, int revents) 2268pipecb (EV_P_ ev_io *iow, int revents)
1355{ 2269{
1356 int i; 2270 int i;
1357 2271
2272 if (revents & EV_READ)
2273 {
1358#if EV_USE_EVENTFD 2274#if EV_USE_EVENTFD
1359 if (evfd >= 0) 2275 if (evpipe [0] < 0)
1360 { 2276 {
1361 uint64_t counter; 2277 uint64_t counter;
1362 read (evfd, &counter, sizeof (uint64_t)); 2278 read (evpipe [1], &counter, sizeof (uint64_t));
1363 } 2279 }
1364 else 2280 else
1365#endif 2281#endif
1366 { 2282 {
1367 char dummy; 2283 char dummy[4];
1368 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2284#ifdef _WIN32
2285 WSABUF buf;
2286 DWORD recvd;
2287 DWORD flags = 0;
2288 buf.buf = dummy;
2289 buf.len = sizeof (dummy);
2290 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2291#else
1369 read (evpipe [0], &dummy, 1); 2292 read (evpipe [0], &dummy, sizeof (dummy));
2293#endif
2294 }
1370 } 2295 }
2296
2297 pipe_write_skipped = 0;
2298
2299 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1371 2300
1372#if EV_SIGNAL_ENABLE 2301#if EV_SIGNAL_ENABLE
1373 if (sig_pending) 2302 if (sig_pending)
1374 { 2303 {
1375 sig_pending = 0; 2304 sig_pending = 0;
2305
2306 ECB_MEMORY_FENCE;
1376 2307
1377 for (i = EV_NSIG - 1; i--; ) 2308 for (i = EV_NSIG - 1; i--; )
1378 if (expect_false (signals [i].pending)) 2309 if (expect_false (signals [i].pending))
1379 ev_feed_signal_event (EV_A_ i + 1); 2310 ev_feed_signal_event (EV_A_ i + 1);
1380 } 2311 }
… …
1382 2313
1383#if EV_ASYNC_ENABLE 2314#if EV_ASYNC_ENABLE
1384 if (async_pending) 2315 if (async_pending)
1385 { 2316 {
1386 async_pending = 0; 2317 async_pending = 0;
2318
2319 ECB_MEMORY_FENCE;
1387 2320
1388 for (i = asynccnt; i--; ) 2321 for (i = asynccnt; i--; )
1389 if (asyncs [i]->sent) 2322 if (asyncs [i]->sent)
1390 { 2323 {
1391 asyncs [i]->sent = 0; 2324 asyncs [i]->sent = 0;
2325 ECB_MEMORY_FENCE_RELEASE;
1392 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2326 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1393 } 2327 }
1394 } 2328 }
1395#endif 2329#endif
1396} 2330}
1397 2331
1398/*****************************************************************************/ 2332/*****************************************************************************/
1399 2333
1400void 2334void
1401ev_feed_signal (int signum) 2335ev_feed_signal (int signum) EV_THROW
1402{ 2336{
1403#if EV_MULTIPLICITY 2337#if EV_MULTIPLICITY
2338 EV_P;
2339 ECB_MEMORY_FENCE_ACQUIRE;
1404 EV_P = signals [signum - 1].loop; 2340 EV_A = signals [signum - 1].loop;
1405 2341
1406 if (!EV_A) 2342 if (!EV_A)
1407 return; 2343 return;
1408#endif 2344#endif
1409 2345
… …
1420 2356
1421 ev_feed_signal (signum); 2357 ev_feed_signal (signum);
1422} 2358}
1423 2359
1424void noinline 2360void noinline
1425ev_feed_signal_event (EV_P_ int signum) 2361ev_feed_signal_event (EV_P_ int signum) EV_THROW
1426{ 2362{
1427 WL w; 2363 WL w;
1428 2364
1429 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2365 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1430 return; 2366 return;
1431 2367
1432 --signum; 2368 --signum;
1433 2369
1434#if EV_MULTIPLICITY 2370#if EV_MULTIPLICITY
… …
1438 if (expect_false (signals [signum].loop != EV_A)) 2374 if (expect_false (signals [signum].loop != EV_A))
1439 return; 2375 return;
1440#endif 2376#endif
1441 2377
1442 signals [signum].pending = 0; 2378 signals [signum].pending = 0;
2379 ECB_MEMORY_FENCE_RELEASE;
1443 2380
1444 for (w = signals [signum].head; w; w = w->next) 2381 for (w = signals [signum].head; w; w = w->next)
1445 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2382 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1446} 2383}
1447 2384
… …
1545#endif 2482#endif
1546#if EV_USE_SELECT 2483#if EV_USE_SELECT
1547# include "ev_select.c" 2484# include "ev_select.c"
1548#endif 2485#endif
1549 2486
1550int 2487int ecb_cold
1551ev_version_major (void) 2488ev_version_major (void) EV_THROW
1552{ 2489{
1553 return EV_VERSION_MAJOR; 2490 return EV_VERSION_MAJOR;
1554} 2491}
1555 2492
1556int 2493int ecb_cold
1557ev_version_minor (void) 2494ev_version_minor (void) EV_THROW
1558{ 2495{
1559 return EV_VERSION_MINOR; 2496 return EV_VERSION_MINOR;
1560} 2497}
1561 2498
1562/* return true if we are running with elevated privileges and should ignore env variables */ 2499/* return true if we are running with elevated privileges and should ignore env variables */
1563int inline_size 2500int inline_size ecb_cold
1564enable_secure (void) 2501enable_secure (void)
1565{ 2502{
1566#ifdef _WIN32 2503#ifdef _WIN32
1567 return 0; 2504 return 0;
1568#else 2505#else
1569 return getuid () != geteuid () 2506 return getuid () != geteuid ()
1570 || getgid () != getegid (); 2507 || getgid () != getegid ();
1571#endif 2508#endif
1572} 2509}
1573 2510
1574unsigned int 2511unsigned int ecb_cold
1575ev_supported_backends (void) 2512ev_supported_backends (void) EV_THROW
1576{ 2513{
1577 unsigned int flags = 0; 2514 unsigned int flags = 0;
1578 2515
1579 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2516 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1580 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2517 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1583 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2520 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1584 2521
1585 return flags; 2522 return flags;
1586} 2523}
1587 2524
1588unsigned int 2525unsigned int ecb_cold
1589ev_recommended_backends (void) 2526ev_recommended_backends (void) EV_THROW
1590{ 2527{
1591 unsigned int flags = ev_supported_backends (); 2528 unsigned int flags = ev_supported_backends ();
1592 2529
1593#ifndef __NetBSD__ 2530#ifndef __NetBSD__
1594 /* kqueue is borked on everything but netbsd apparently */ 2531 /* kqueue is borked on everything but netbsd apparently */
… …
1605#endif 2542#endif
1606 2543
1607 return flags; 2544 return flags;
1608} 2545}
1609 2546
1610unsigned int 2547unsigned int ecb_cold
1611ev_embeddable_backends (void) 2548ev_embeddable_backends (void) EV_THROW
1612{ 2549{
1613 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2550 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1614 2551
1615 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2552 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1616 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2553 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1618 2555
1619 return flags; 2556 return flags;
1620} 2557}
1621 2558
1622unsigned int 2559unsigned int
1623ev_backend (EV_P) 2560ev_backend (EV_P) EV_THROW
1624{ 2561{
1625 return backend; 2562 return backend;
1626} 2563}
1627 2564
1628#if EV_FEATURE_API 2565#if EV_FEATURE_API
1629unsigned int 2566unsigned int
1630ev_iteration (EV_P) 2567ev_iteration (EV_P) EV_THROW
1631{ 2568{
1632 return loop_count; 2569 return loop_count;
1633} 2570}
1634 2571
1635unsigned int 2572unsigned int
1636ev_depth (EV_P) 2573ev_depth (EV_P) EV_THROW
1637{ 2574{
1638 return loop_depth; 2575 return loop_depth;
1639} 2576}
1640 2577
1641void 2578void
1642ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2579ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1643{ 2580{
1644 io_blocktime = interval; 2581 io_blocktime = interval;
1645} 2582}
1646 2583
1647void 2584void
1648ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2585ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1649{ 2586{
1650 timeout_blocktime = interval; 2587 timeout_blocktime = interval;
1651} 2588}
1652 2589
1653void 2590void
1654ev_set_userdata (EV_P_ void *data) 2591ev_set_userdata (EV_P_ void *data) EV_THROW
1655{ 2592{
1656 userdata = data; 2593 userdata = data;
1657} 2594}
1658 2595
1659void * 2596void *
1660ev_userdata (EV_P) 2597ev_userdata (EV_P) EV_THROW
1661{ 2598{
1662 return userdata; 2599 return userdata;
1663} 2600}
1664 2601
2602void
1665void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2603ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
1666{ 2604{
1667 invoke_cb = invoke_pending_cb; 2605 invoke_cb = invoke_pending_cb;
1668} 2606}
1669 2607
1670void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2608void
2609ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
1671{ 2610{
1672 release_cb = release; 2611 release_cb = release;
1673 acquire_cb = acquire; 2612 acquire_cb = acquire;
1674} 2613}
1675#endif 2614#endif
1676 2615
1677/* initialise a loop structure, must be zero-initialised */ 2616/* initialise a loop structure, must be zero-initialised */
1678static void noinline 2617static void noinline ecb_cold
1679loop_init (EV_P_ unsigned int flags) 2618loop_init (EV_P_ unsigned int flags) EV_THROW
1680{ 2619{
1681 if (!backend) 2620 if (!backend)
1682 { 2621 {
1683 origflags = flags; 2622 origflags = flags;
1684 2623
… …
1711 if (!(flags & EVFLAG_NOENV) 2650 if (!(flags & EVFLAG_NOENV)
1712 && !enable_secure () 2651 && !enable_secure ()
1713 && getenv ("LIBEV_FLAGS")) 2652 && getenv ("LIBEV_FLAGS"))
1714 flags = atoi (getenv ("LIBEV_FLAGS")); 2653 flags = atoi (getenv ("LIBEV_FLAGS"));
1715 2654
1716 ev_rt_now = ev_time (); 2655 ev_rt_now = ev_time ();
1717 mn_now = get_clock (); 2656 mn_now = get_clock ();
1718 now_floor = mn_now; 2657 now_floor = mn_now;
1719 rtmn_diff = ev_rt_now - mn_now; 2658 rtmn_diff = ev_rt_now - mn_now;
1720#if EV_FEATURE_API 2659#if EV_FEATURE_API
1721 invoke_cb = ev_invoke_pending; 2660 invoke_cb = ev_invoke_pending;
1722#endif 2661#endif
1723 2662
1724 io_blocktime = 0.; 2663 io_blocktime = 0.;
1725 timeout_blocktime = 0.; 2664 timeout_blocktime = 0.;
1726 backend = 0; 2665 backend = 0;
1727 backend_fd = -1; 2666 backend_fd = -1;
1728 sig_pending = 0; 2667 sig_pending = 0;
1729#if EV_ASYNC_ENABLE 2668#if EV_ASYNC_ENABLE
1730 async_pending = 0; 2669 async_pending = 0;
1731#endif 2670#endif
2671 pipe_write_skipped = 0;
2672 pipe_write_wanted = 0;
2673 evpipe [0] = -1;
2674 evpipe [1] = -1;
1732#if EV_USE_INOTIFY 2675#if EV_USE_INOTIFY
1733 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2676 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1734#endif 2677#endif
1735#if EV_USE_SIGNALFD 2678#if EV_USE_SIGNALFD
1736 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2679 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1737#endif 2680#endif
1738 2681
1739 if (!(flags & EVBACKEND_MASK)) 2682 if (!(flags & EVBACKEND_MASK))
1740 flags |= ev_recommended_backends (); 2683 flags |= ev_recommended_backends ();
1741 2684
… …
1766#endif 2709#endif
1767 } 2710 }
1768} 2711}
1769 2712
1770/* free up a loop structure */ 2713/* free up a loop structure */
1771void 2714void ecb_cold
1772ev_loop_destroy (EV_P) 2715ev_loop_destroy (EV_P)
1773{ 2716{
1774 int i; 2717 int i;
1775 2718
1776#if EV_MULTIPLICITY 2719#if EV_MULTIPLICITY
… …
1787 EV_INVOKE_PENDING; 2730 EV_INVOKE_PENDING;
1788 } 2731 }
1789#endif 2732#endif
1790 2733
1791#if EV_CHILD_ENABLE 2734#if EV_CHILD_ENABLE
1792 if (ev_is_active (&childev)) 2735 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1793 { 2736 {
1794 ev_ref (EV_A); /* child watcher */ 2737 ev_ref (EV_A); /* child watcher */
1795 ev_signal_stop (EV_A_ &childev); 2738 ev_signal_stop (EV_A_ &childev);
1796 } 2739 }
1797#endif 2740#endif
… …
1799 if (ev_is_active (&pipe_w)) 2742 if (ev_is_active (&pipe_w))
1800 { 2743 {
1801 /*ev_ref (EV_A);*/ 2744 /*ev_ref (EV_A);*/
1802 /*ev_io_stop (EV_A_ &pipe_w);*/ 2745 /*ev_io_stop (EV_A_ &pipe_w);*/
1803 2746
1804#if EV_USE_EVENTFD
1805 if (evfd >= 0)
1806 close (evfd);
1807#endif
1808
1809 if (evpipe [0] >= 0)
1810 {
1811 EV_WIN32_CLOSE_FD (evpipe [0]); 2747 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1812 EV_WIN32_CLOSE_FD (evpipe [1]); 2748 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1813 }
1814 } 2749 }
1815 2750
1816#if EV_USE_SIGNALFD 2751#if EV_USE_SIGNALFD
1817 if (ev_is_active (&sigfd_w)) 2752 if (ev_is_active (&sigfd_w))
1818 close (sigfd); 2753 close (sigfd);
… …
1904#endif 2839#endif
1905#if EV_USE_INOTIFY 2840#if EV_USE_INOTIFY
1906 infy_fork (EV_A); 2841 infy_fork (EV_A);
1907#endif 2842#endif
1908 2843
2844#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1909 if (ev_is_active (&pipe_w)) 2845 if (ev_is_active (&pipe_w))
1910 { 2846 {
1911 /* this "locks" the handlers against writing to the pipe */ 2847 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1912 /* while we modify the fd vars */
1913 sig_pending = 1;
1914#if EV_ASYNC_ENABLE
1915 async_pending = 1;
1916#endif
1917 2848
1918 ev_ref (EV_A); 2849 ev_ref (EV_A);
1919 ev_io_stop (EV_A_ &pipe_w); 2850 ev_io_stop (EV_A_ &pipe_w);
1920 2851
1921#if EV_USE_EVENTFD
1922 if (evfd >= 0)
1923 close (evfd);
1924#endif
1925
1926 if (evpipe [0] >= 0) 2852 if (evpipe [0] >= 0)
1927 {
1928 EV_WIN32_CLOSE_FD (evpipe [0]); 2853 EV_WIN32_CLOSE_FD (evpipe [0]);
1929 EV_WIN32_CLOSE_FD (evpipe [1]);
1930 }
1931 2854
1932#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1933 evpipe_init (EV_A); 2855 evpipe_init (EV_A);
1934 /* now iterate over everything, in case we missed something */ 2856 /* iterate over everything, in case we missed something before */
1935 pipecb (EV_A_ &pipe_w, EV_READ); 2857 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1936#endif
1937 } 2858 }
2859#endif
1938 2860
1939 postfork = 0; 2861 postfork = 0;
1940} 2862}
1941 2863
1942#if EV_MULTIPLICITY 2864#if EV_MULTIPLICITY
1943 2865
1944struct ev_loop * 2866struct ev_loop * ecb_cold
1945ev_loop_new (unsigned int flags) 2867ev_loop_new (unsigned int flags) EV_THROW
1946{ 2868{
1947 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2869 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1948 2870
1949 memset (EV_A, 0, sizeof (struct ev_loop)); 2871 memset (EV_A, 0, sizeof (struct ev_loop));
1950 loop_init (EV_A_ flags); 2872 loop_init (EV_A_ flags);
… …
1957} 2879}
1958 2880
1959#endif /* multiplicity */ 2881#endif /* multiplicity */
1960 2882
1961#if EV_VERIFY 2883#if EV_VERIFY
1962static void noinline 2884static void noinline ecb_cold
1963verify_watcher (EV_P_ W w) 2885verify_watcher (EV_P_ W w)
1964{ 2886{
1965 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2887 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1966 2888
1967 if (w->pending) 2889 if (w->pending)
1968 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2890 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1969} 2891}
1970 2892
1971static void noinline 2893static void noinline ecb_cold
1972verify_heap (EV_P_ ANHE *heap, int N) 2894verify_heap (EV_P_ ANHE *heap, int N)
1973{ 2895{
1974 int i; 2896 int i;
1975 2897
1976 for (i = HEAP0; i < N + HEAP0; ++i) 2898 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1981 2903
1982 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2904 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1983 } 2905 }
1984} 2906}
1985 2907
1986static void noinline 2908static void noinline ecb_cold
1987array_verify (EV_P_ W *ws, int cnt) 2909array_verify (EV_P_ W *ws, int cnt)
1988{ 2910{
1989 while (cnt--) 2911 while (cnt--)
1990 { 2912 {
1991 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2913 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1993 } 2915 }
1994} 2916}
1995#endif 2917#endif
1996 2918
1997#if EV_FEATURE_API 2919#if EV_FEATURE_API
1998void 2920void ecb_cold
1999ev_verify (EV_P) 2921ev_verify (EV_P) EV_THROW
2000{ 2922{
2001#if EV_VERIFY 2923#if EV_VERIFY
2002 int i; 2924 int i;
2003 WL w; 2925 WL w, w2;
2004 2926
2005 assert (activecnt >= -1); 2927 assert (activecnt >= -1);
2006 2928
2007 assert (fdchangemax >= fdchangecnt); 2929 assert (fdchangemax >= fdchangecnt);
2008 for (i = 0; i < fdchangecnt; ++i) 2930 for (i = 0; i < fdchangecnt; ++i)
2009 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2931 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2010 2932
2011 assert (anfdmax >= 0); 2933 assert (anfdmax >= 0);
2012 for (i = 0; i < anfdmax; ++i) 2934 for (i = 0; i < anfdmax; ++i)
2935 {
2936 int j = 0;
2937
2013 for (w = anfds [i].head; w; w = w->next) 2938 for (w = w2 = anfds [i].head; w; w = w->next)
2014 { 2939 {
2015 verify_watcher (EV_A_ (W)w); 2940 verify_watcher (EV_A_ (W)w);
2941
2942 if (j++ & 1)
2943 {
2944 assert (("libev: io watcher list contains a loop", w != w2));
2945 w2 = w2->next;
2946 }
2947
2016 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2948 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2017 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2949 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2018 } 2950 }
2951 }
2019 2952
2020 assert (timermax >= timercnt); 2953 assert (timermax >= timercnt);
2021 verify_heap (EV_A_ timers, timercnt); 2954 verify_heap (EV_A_ timers, timercnt);
2022 2955
2023#if EV_PERIODIC_ENABLE 2956#if EV_PERIODIC_ENABLE
… …
2069#endif 3002#endif
2070} 3003}
2071#endif 3004#endif
2072 3005
2073#if EV_MULTIPLICITY 3006#if EV_MULTIPLICITY
2074struct ev_loop * 3007struct ev_loop * ecb_cold
2075#else 3008#else
2076int 3009int
2077#endif 3010#endif
2078ev_default_loop (unsigned int flags) 3011ev_default_loop (unsigned int flags) EV_THROW
2079{ 3012{
2080 if (!ev_default_loop_ptr) 3013 if (!ev_default_loop_ptr)
2081 { 3014 {
2082#if EV_MULTIPLICITY 3015#if EV_MULTIPLICITY
2083 EV_P = ev_default_loop_ptr = &default_loop_struct; 3016 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2102 3035
2103 return ev_default_loop_ptr; 3036 return ev_default_loop_ptr;
2104} 3037}
2105 3038
2106void 3039void
2107ev_loop_fork (EV_P) 3040ev_loop_fork (EV_P) EV_THROW
2108{ 3041{
2109 postfork = 1; /* must be in line with ev_default_fork */ 3042 postfork = 1;
2110} 3043}
2111 3044
2112/*****************************************************************************/ 3045/*****************************************************************************/
2113 3046
2114void 3047void
… …
2116{ 3049{
2117 EV_CB_INVOKE ((W)w, revents); 3050 EV_CB_INVOKE ((W)w, revents);
2118} 3051}
2119 3052
2120unsigned int 3053unsigned int
2121ev_pending_count (EV_P) 3054ev_pending_count (EV_P) EV_THROW
2122{ 3055{
2123 int pri; 3056 int pri;
2124 unsigned int count = 0; 3057 unsigned int count = 0;
2125 3058
2126 for (pri = NUMPRI; pri--; ) 3059 for (pri = NUMPRI; pri--; )
… …
2130} 3063}
2131 3064
2132void noinline 3065void noinline
2133ev_invoke_pending (EV_P) 3066ev_invoke_pending (EV_P)
2134{ 3067{
2135 int pri; 3068 pendingpri = NUMPRI;
2136 3069
2137 for (pri = NUMPRI; pri--; ) 3070 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3071 {
3072 --pendingpri;
3073
2138 while (pendingcnt [pri]) 3074 while (pendingcnt [pendingpri])
2139 { 3075 {
2140 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3076 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2141 3077
2142 p->w->pending = 0; 3078 p->w->pending = 0;
2143 EV_CB_INVOKE (p->w, p->events); 3079 EV_CB_INVOKE (p->w, p->events);
2144 EV_FREQUENT_CHECK; 3080 EV_FREQUENT_CHECK;
2145 } 3081 }
3082 }
2146} 3083}
2147 3084
2148#if EV_IDLE_ENABLE 3085#if EV_IDLE_ENABLE
2149/* make idle watchers pending. this handles the "call-idle */ 3086/* make idle watchers pending. this handles the "call-idle */
2150/* only when higher priorities are idle" logic */ 3087/* only when higher priorities are idle" logic */
… …
2208 } 3145 }
2209} 3146}
2210 3147
2211#if EV_PERIODIC_ENABLE 3148#if EV_PERIODIC_ENABLE
2212 3149
2213inline_speed void 3150static void noinline
2214periodic_recalc (EV_P_ ev_periodic *w) 3151periodic_recalc (EV_P_ ev_periodic *w)
2215{ 3152{
2216 /* TODO: use slow but potentially more correct incremental algo, */ 3153 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2217 /* also do not rely on ceil */ 3154 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2218 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3155
3156 /* the above almost always errs on the low side */
3157 while (at <= ev_rt_now)
3158 {
3159 ev_tstamp nat = at + w->interval;
3160
3161 /* when resolution fails us, we use ev_rt_now */
3162 if (expect_false (nat == at))
3163 {
3164 at = ev_rt_now;
3165 break;
3166 }
3167
3168 at = nat;
3169 }
3170
3171 ev_at (w) = at;
2219} 3172}
2220 3173
2221/* make periodics pending */ 3174/* make periodics pending */
2222inline_size void 3175inline_size void
2223periodics_reify (EV_P) 3176periodics_reify (EV_P)
2224{ 3177{
2225 EV_FREQUENT_CHECK; 3178 EV_FREQUENT_CHECK;
2226 3179
2227 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3180 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2228 { 3181 {
2229 int feed_count = 0;
2230
2231 do 3182 do
2232 { 3183 {
2233 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3184 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2234 3185
2235 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3186 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2245 downheap (periodics, periodiccnt, HEAP0); 3196 downheap (periodics, periodiccnt, HEAP0);
2246 } 3197 }
2247 else if (w->interval) 3198 else if (w->interval)
2248 { 3199 {
2249 periodic_recalc (EV_A_ w); 3200 periodic_recalc (EV_A_ w);
2250
2251 /* if next trigger time is not sufficiently in the future, put it there */
2252 /* this might happen because of floating point inexactness */
2253 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2254 {
2255 ev_at (w) += w->interval;
2256
2257 /* if interval is unreasonably low we might still have a time in the past */
2258 /* so correct this. this will make the periodic very inexact, but the user */
2259 /* has effectively asked to get triggered more often than possible */
2260 if (ev_at (w) < ev_rt_now)
2261 ev_at (w) = ev_rt_now;
2262 }
2263
2264 ANHE_at_cache (periodics [HEAP0]); 3201 ANHE_at_cache (periodics [HEAP0]);
2265 downheap (periodics, periodiccnt, HEAP0); 3202 downheap (periodics, periodiccnt, HEAP0);
2266 } 3203 }
2267 else 3204 else
2268 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3205 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2276 } 3213 }
2277} 3214}
2278 3215
2279/* simply recalculate all periodics */ 3216/* simply recalculate all periodics */
2280/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3217/* TODO: maybe ensure that at least one event happens when jumping forward? */
2281static void noinline 3218static void noinline ecb_cold
2282periodics_reschedule (EV_P) 3219periodics_reschedule (EV_P)
2283{ 3220{
2284 int i; 3221 int i;
2285 3222
2286 /* adjust periodics after time jump */ 3223 /* adjust periodics after time jump */
… …
2299 reheap (periodics, periodiccnt); 3236 reheap (periodics, periodiccnt);
2300} 3237}
2301#endif 3238#endif
2302 3239
2303/* adjust all timers by a given offset */ 3240/* adjust all timers by a given offset */
2304static void noinline 3241static void noinline ecb_cold
2305timers_reschedule (EV_P_ ev_tstamp adjust) 3242timers_reschedule (EV_P_ ev_tstamp adjust)
2306{ 3243{
2307 int i; 3244 int i;
2308 3245
2309 for (i = 0; i < timercnt; ++i) 3246 for (i = 0; i < timercnt; ++i)
… …
2346 * doesn't hurt either as we only do this on time-jumps or 3283 * doesn't hurt either as we only do this on time-jumps or
2347 * in the unlikely event of having been preempted here. 3284 * in the unlikely event of having been preempted here.
2348 */ 3285 */
2349 for (i = 4; --i; ) 3286 for (i = 4; --i; )
2350 { 3287 {
3288 ev_tstamp diff;
2351 rtmn_diff = ev_rt_now - mn_now; 3289 rtmn_diff = ev_rt_now - mn_now;
2352 3290
3291 diff = odiff - rtmn_diff;
3292
2353 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3293 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2354 return; /* all is well */ 3294 return; /* all is well */
2355 3295
2356 ev_rt_now = ev_time (); 3296 ev_rt_now = ev_time ();
2357 mn_now = get_clock (); 3297 mn_now = get_clock ();
2358 now_floor = mn_now; 3298 now_floor = mn_now;
… …
2380 3320
2381 mn_now = ev_rt_now; 3321 mn_now = ev_rt_now;
2382 } 3322 }
2383} 3323}
2384 3324
2385void 3325int
2386ev_run (EV_P_ int flags) 3326ev_run (EV_P_ int flags)
2387{ 3327{
2388#if EV_FEATURE_API 3328#if EV_FEATURE_API
2389 ++loop_depth; 3329 ++loop_depth;
2390#endif 3330#endif
… …
2448 ev_tstamp prev_mn_now = mn_now; 3388 ev_tstamp prev_mn_now = mn_now;
2449 3389
2450 /* update time to cancel out callback processing overhead */ 3390 /* update time to cancel out callback processing overhead */
2451 time_update (EV_A_ 1e100); 3391 time_update (EV_A_ 1e100);
2452 3392
3393 /* from now on, we want a pipe-wake-up */
3394 pipe_write_wanted = 1;
3395
3396 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3397
2453 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3398 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2454 { 3399 {
2455 waittime = MAX_BLOCKTIME; 3400 waittime = MAX_BLOCKTIME;
2456 3401
2457 if (timercnt) 3402 if (timercnt)
2458 { 3403 {
2459 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3404 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2460 if (waittime > to) waittime = to; 3405 if (waittime > to) waittime = to;
2461 } 3406 }
2462 3407
2463#if EV_PERIODIC_ENABLE 3408#if EV_PERIODIC_ENABLE
2464 if (periodiccnt) 3409 if (periodiccnt)
2465 { 3410 {
2466 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3411 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2467 if (waittime > to) waittime = to; 3412 if (waittime > to) waittime = to;
2468 } 3413 }
2469#endif 3414#endif
2470 3415
2471 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3416 /* don't let timeouts decrease the waittime below timeout_blocktime */
2472 if (expect_false (waittime < timeout_blocktime)) 3417 if (expect_false (waittime < timeout_blocktime))
2473 waittime = timeout_blocktime; 3418 waittime = timeout_blocktime;
3419
3420 /* at this point, we NEED to wait, so we have to ensure */
3421 /* to pass a minimum nonzero value to the backend */
3422 if (expect_false (waittime < backend_mintime))
3423 waittime = backend_mintime;
2474 3424
2475 /* extra check because io_blocktime is commonly 0 */ 3425 /* extra check because io_blocktime is commonly 0 */
2476 if (expect_false (io_blocktime)) 3426 if (expect_false (io_blocktime))
2477 { 3427 {
2478 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3428 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2479 3429
2480 if (sleeptime > waittime - backend_fudge) 3430 if (sleeptime > waittime - backend_mintime)
2481 sleeptime = waittime - backend_fudge; 3431 sleeptime = waittime - backend_mintime;
2482 3432
2483 if (expect_true (sleeptime > 0.)) 3433 if (expect_true (sleeptime > 0.))
2484 { 3434 {
2485 ev_sleep (sleeptime); 3435 ev_sleep (sleeptime);
2486 waittime -= sleeptime; 3436 waittime -= sleeptime;
… …
2493#endif 3443#endif
2494 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3444 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2495 backend_poll (EV_A_ waittime); 3445 backend_poll (EV_A_ waittime);
2496 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3446 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2497 3447
3448 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3449
3450 ECB_MEMORY_FENCE_ACQUIRE;
3451 if (pipe_write_skipped)
3452 {
3453 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3454 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3455 }
3456
3457
2498 /* update ev_rt_now, do magic */ 3458 /* update ev_rt_now, do magic */
2499 time_update (EV_A_ waittime + sleeptime); 3459 time_update (EV_A_ waittime + sleeptime);
2500 } 3460 }
2501 3461
2502 /* queue pending timers and reschedule them */ 3462 /* queue pending timers and reschedule them */
… …
2528 loop_done = EVBREAK_CANCEL; 3488 loop_done = EVBREAK_CANCEL;
2529 3489
2530#if EV_FEATURE_API 3490#if EV_FEATURE_API
2531 --loop_depth; 3491 --loop_depth;
2532#endif 3492#endif
3493
3494 return activecnt;
2533} 3495}
2534 3496
2535void 3497void
2536ev_break (EV_P_ int how) 3498ev_break (EV_P_ int how) EV_THROW
2537{ 3499{
2538 loop_done = how; 3500 loop_done = how;
2539} 3501}
2540 3502
2541void 3503void
2542ev_ref (EV_P) 3504ev_ref (EV_P) EV_THROW
2543{ 3505{
2544 ++activecnt; 3506 ++activecnt;
2545} 3507}
2546 3508
2547void 3509void
2548ev_unref (EV_P) 3510ev_unref (EV_P) EV_THROW
2549{ 3511{
2550 --activecnt; 3512 --activecnt;
2551} 3513}
2552 3514
2553void 3515void
2554ev_now_update (EV_P) 3516ev_now_update (EV_P) EV_THROW
2555{ 3517{
2556 time_update (EV_A_ 1e100); 3518 time_update (EV_A_ 1e100);
2557} 3519}
2558 3520
2559void 3521void
2560ev_suspend (EV_P) 3522ev_suspend (EV_P) EV_THROW
2561{ 3523{
2562 ev_now_update (EV_A); 3524 ev_now_update (EV_A);
2563} 3525}
2564 3526
2565void 3527void
2566ev_resume (EV_P) 3528ev_resume (EV_P) EV_THROW
2567{ 3529{
2568 ev_tstamp mn_prev = mn_now; 3530 ev_tstamp mn_prev = mn_now;
2569 3531
2570 ev_now_update (EV_A); 3532 ev_now_update (EV_A);
2571 timers_reschedule (EV_A_ mn_now - mn_prev); 3533 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2610 w->pending = 0; 3572 w->pending = 0;
2611 } 3573 }
2612} 3574}
2613 3575
2614int 3576int
2615ev_clear_pending (EV_P_ void *w) 3577ev_clear_pending (EV_P_ void *w) EV_THROW
2616{ 3578{
2617 W w_ = (W)w; 3579 W w_ = (W)w;
2618 int pending = w_->pending; 3580 int pending = w_->pending;
2619 3581
2620 if (expect_true (pending)) 3582 if (expect_true (pending))
… …
2653} 3615}
2654 3616
2655/*****************************************************************************/ 3617/*****************************************************************************/
2656 3618
2657void noinline 3619void noinline
2658ev_io_start (EV_P_ ev_io *w) 3620ev_io_start (EV_P_ ev_io *w) EV_THROW
2659{ 3621{
2660 int fd = w->fd; 3622 int fd = w->fd;
2661 3623
2662 if (expect_false (ev_is_active (w))) 3624 if (expect_false (ev_is_active (w)))
2663 return; 3625 return;
… …
2669 3631
2670 ev_start (EV_A_ (W)w, 1); 3632 ev_start (EV_A_ (W)w, 1);
2671 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3633 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2672 wlist_add (&anfds[fd].head, (WL)w); 3634 wlist_add (&anfds[fd].head, (WL)w);
2673 3635
3636 /* common bug, apparently */
3637 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3638
2674 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3639 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2675 w->events &= ~EV__IOFDSET; 3640 w->events &= ~EV__IOFDSET;
2676 3641
2677 EV_FREQUENT_CHECK; 3642 EV_FREQUENT_CHECK;
2678} 3643}
2679 3644
2680void noinline 3645void noinline
2681ev_io_stop (EV_P_ ev_io *w) 3646ev_io_stop (EV_P_ ev_io *w) EV_THROW
2682{ 3647{
2683 clear_pending (EV_A_ (W)w); 3648 clear_pending (EV_A_ (W)w);
2684 if (expect_false (!ev_is_active (w))) 3649 if (expect_false (!ev_is_active (w)))
2685 return; 3650 return;
2686 3651
… …
2695 3660
2696 EV_FREQUENT_CHECK; 3661 EV_FREQUENT_CHECK;
2697} 3662}
2698 3663
2699void noinline 3664void noinline
2700ev_timer_start (EV_P_ ev_timer *w) 3665ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2701{ 3666{
2702 if (expect_false (ev_is_active (w))) 3667 if (expect_false (ev_is_active (w)))
2703 return; 3668 return;
2704 3669
2705 ev_at (w) += mn_now; 3670 ev_at (w) += mn_now;
… …
2719 3684
2720 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3685 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2721} 3686}
2722 3687
2723void noinline 3688void noinline
2724ev_timer_stop (EV_P_ ev_timer *w) 3689ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2725{ 3690{
2726 clear_pending (EV_A_ (W)w); 3691 clear_pending (EV_A_ (W)w);
2727 if (expect_false (!ev_is_active (w))) 3692 if (expect_false (!ev_is_active (w)))
2728 return; 3693 return;
2729 3694
… …
2749 3714
2750 EV_FREQUENT_CHECK; 3715 EV_FREQUENT_CHECK;
2751} 3716}
2752 3717
2753void noinline 3718void noinline
2754ev_timer_again (EV_P_ ev_timer *w) 3719ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2755{ 3720{
2756 EV_FREQUENT_CHECK; 3721 EV_FREQUENT_CHECK;
3722
3723 clear_pending (EV_A_ (W)w);
2757 3724
2758 if (ev_is_active (w)) 3725 if (ev_is_active (w))
2759 { 3726 {
2760 if (w->repeat) 3727 if (w->repeat)
2761 { 3728 {
… …
2774 3741
2775 EV_FREQUENT_CHECK; 3742 EV_FREQUENT_CHECK;
2776} 3743}
2777 3744
2778ev_tstamp 3745ev_tstamp
2779ev_timer_remaining (EV_P_ ev_timer *w) 3746ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2780{ 3747{
2781 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3748 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2782} 3749}
2783 3750
2784#if EV_PERIODIC_ENABLE 3751#if EV_PERIODIC_ENABLE
2785void noinline 3752void noinline
2786ev_periodic_start (EV_P_ ev_periodic *w) 3753ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2787{ 3754{
2788 if (expect_false (ev_is_active (w))) 3755 if (expect_false (ev_is_active (w)))
2789 return; 3756 return;
2790 3757
2791 if (w->reschedule_cb) 3758 if (w->reschedule_cb)
… …
2811 3778
2812 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3779 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2813} 3780}
2814 3781
2815void noinline 3782void noinline
2816ev_periodic_stop (EV_P_ ev_periodic *w) 3783ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2817{ 3784{
2818 clear_pending (EV_A_ (W)w); 3785 clear_pending (EV_A_ (W)w);
2819 if (expect_false (!ev_is_active (w))) 3786 if (expect_false (!ev_is_active (w)))
2820 return; 3787 return;
2821 3788
… …
2839 3806
2840 EV_FREQUENT_CHECK; 3807 EV_FREQUENT_CHECK;
2841} 3808}
2842 3809
2843void noinline 3810void noinline
2844ev_periodic_again (EV_P_ ev_periodic *w) 3811ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2845{ 3812{
2846 /* TODO: use adjustheap and recalculation */ 3813 /* TODO: use adjustheap and recalculation */
2847 ev_periodic_stop (EV_A_ w); 3814 ev_periodic_stop (EV_A_ w);
2848 ev_periodic_start (EV_A_ w); 3815 ev_periodic_start (EV_A_ w);
2849} 3816}
… …
2854#endif 3821#endif
2855 3822
2856#if EV_SIGNAL_ENABLE 3823#if EV_SIGNAL_ENABLE
2857 3824
2858void noinline 3825void noinline
2859ev_signal_start (EV_P_ ev_signal *w) 3826ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2860{ 3827{
2861 if (expect_false (ev_is_active (w))) 3828 if (expect_false (ev_is_active (w)))
2862 return; 3829 return;
2863 3830
2864 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3831 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2866#if EV_MULTIPLICITY 3833#if EV_MULTIPLICITY
2867 assert (("libev: a signal must not be attached to two different loops", 3834 assert (("libev: a signal must not be attached to two different loops",
2868 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3835 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2869 3836
2870 signals [w->signum - 1].loop = EV_A; 3837 signals [w->signum - 1].loop = EV_A;
3838 ECB_MEMORY_FENCE_RELEASE;
2871#endif 3839#endif
2872 3840
2873 EV_FREQUENT_CHECK; 3841 EV_FREQUENT_CHECK;
2874 3842
2875#if EV_USE_SIGNALFD 3843#if EV_USE_SIGNALFD
… …
2935 3903
2936 EV_FREQUENT_CHECK; 3904 EV_FREQUENT_CHECK;
2937} 3905}
2938 3906
2939void noinline 3907void noinline
2940ev_signal_stop (EV_P_ ev_signal *w) 3908ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2941{ 3909{
2942 clear_pending (EV_A_ (W)w); 3910 clear_pending (EV_A_ (W)w);
2943 if (expect_false (!ev_is_active (w))) 3911 if (expect_false (!ev_is_active (w)))
2944 return; 3912 return;
2945 3913
… …
2976#endif 3944#endif
2977 3945
2978#if EV_CHILD_ENABLE 3946#if EV_CHILD_ENABLE
2979 3947
2980void 3948void
2981ev_child_start (EV_P_ ev_child *w) 3949ev_child_start (EV_P_ ev_child *w) EV_THROW
2982{ 3950{
2983#if EV_MULTIPLICITY 3951#if EV_MULTIPLICITY
2984 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3952 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2985#endif 3953#endif
2986 if (expect_false (ev_is_active (w))) 3954 if (expect_false (ev_is_active (w)))
… …
2993 3961
2994 EV_FREQUENT_CHECK; 3962 EV_FREQUENT_CHECK;
2995} 3963}
2996 3964
2997void 3965void
2998ev_child_stop (EV_P_ ev_child *w) 3966ev_child_stop (EV_P_ ev_child *w) EV_THROW
2999{ 3967{
3000 clear_pending (EV_A_ (W)w); 3968 clear_pending (EV_A_ (W)w);
3001 if (expect_false (!ev_is_active (w))) 3969 if (expect_false (!ev_is_active (w)))
3002 return; 3970 return;
3003 3971
… …
3030# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3998# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3031 3999
3032static void noinline 4000static void noinline
3033infy_add (EV_P_ ev_stat *w) 4001infy_add (EV_P_ ev_stat *w)
3034{ 4002{
3035 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 4003 w->wd = inotify_add_watch (fs_fd, w->path,
4004 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4005 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4006 | IN_DONT_FOLLOW | IN_MASK_ADD);
3036 4007
3037 if (w->wd >= 0) 4008 if (w->wd >= 0)
3038 { 4009 {
3039 struct statfs sfs; 4010 struct statfs sfs;
3040 4011
… …
3044 4015
3045 if (!fs_2625) 4016 if (!fs_2625)
3046 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4017 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3047 else if (!statfs (w->path, &sfs) 4018 else if (!statfs (w->path, &sfs)
3048 && (sfs.f_type == 0x1373 /* devfs */ 4019 && (sfs.f_type == 0x1373 /* devfs */
4020 || sfs.f_type == 0x4006 /* fat */
4021 || sfs.f_type == 0x4d44 /* msdos */
3049 || sfs.f_type == 0xEF53 /* ext2/3 */ 4022 || sfs.f_type == 0xEF53 /* ext2/3 */
4023 || sfs.f_type == 0x72b6 /* jffs2 */
4024 || sfs.f_type == 0x858458f6 /* ramfs */
4025 || sfs.f_type == 0x5346544e /* ntfs */
3050 || sfs.f_type == 0x3153464a /* jfs */ 4026 || sfs.f_type == 0x3153464a /* jfs */
4027 || sfs.f_type == 0x9123683e /* btrfs */
3051 || sfs.f_type == 0x52654973 /* reiser3 */ 4028 || sfs.f_type == 0x52654973 /* reiser3 */
3052 || sfs.f_type == 0x01021994 /* tempfs */ 4029 || sfs.f_type == 0x01021994 /* tmpfs */
3053 || sfs.f_type == 0x58465342 /* xfs */)) 4030 || sfs.f_type == 0x58465342 /* xfs */))
3054 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4031 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3055 else 4032 else
3056 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4033 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3057 } 4034 }
… …
3155 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4132 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3156 ofs += sizeof (struct inotify_event) + ev->len; 4133 ofs += sizeof (struct inotify_event) + ev->len;
3157 } 4134 }
3158} 4135}
3159 4136
3160inline_size void 4137inline_size void ecb_cold
3161ev_check_2625 (EV_P) 4138ev_check_2625 (EV_P)
3162{ 4139{
3163 /* kernels < 2.6.25 are borked 4140 /* kernels < 2.6.25 are borked
3164 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4141 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3165 */ 4142 */
… …
3170} 4147}
3171 4148
3172inline_size int 4149inline_size int
3173infy_newfd (void) 4150infy_newfd (void)
3174{ 4151{
3175#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4152#if defined IN_CLOEXEC && defined IN_NONBLOCK
3176 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4153 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3177 if (fd >= 0) 4154 if (fd >= 0)
3178 return fd; 4155 return fd;
3179#endif 4156#endif
3180 return inotify_init (); 4157 return inotify_init ();
… …
3255#else 4232#else
3256# define EV_LSTAT(p,b) lstat (p, b) 4233# define EV_LSTAT(p,b) lstat (p, b)
3257#endif 4234#endif
3258 4235
3259void 4236void
3260ev_stat_stat (EV_P_ ev_stat *w) 4237ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3261{ 4238{
3262 if (lstat (w->path, &w->attr) < 0) 4239 if (lstat (w->path, &w->attr) < 0)
3263 w->attr.st_nlink = 0; 4240 w->attr.st_nlink = 0;
3264 else if (!w->attr.st_nlink) 4241 else if (!w->attr.st_nlink)
3265 w->attr.st_nlink = 1; 4242 w->attr.st_nlink = 1;
… …
3304 ev_feed_event (EV_A_ w, EV_STAT); 4281 ev_feed_event (EV_A_ w, EV_STAT);
3305 } 4282 }
3306} 4283}
3307 4284
3308void 4285void
3309ev_stat_start (EV_P_ ev_stat *w) 4286ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3310{ 4287{
3311 if (expect_false (ev_is_active (w))) 4288 if (expect_false (ev_is_active (w)))
3312 return; 4289 return;
3313 4290
3314 ev_stat_stat (EV_A_ w); 4291 ev_stat_stat (EV_A_ w);
… …
3335 4312
3336 EV_FREQUENT_CHECK; 4313 EV_FREQUENT_CHECK;
3337} 4314}
3338 4315
3339void 4316void
3340ev_stat_stop (EV_P_ ev_stat *w) 4317ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3341{ 4318{
3342 clear_pending (EV_A_ (W)w); 4319 clear_pending (EV_A_ (W)w);
3343 if (expect_false (!ev_is_active (w))) 4320 if (expect_false (!ev_is_active (w)))
3344 return; 4321 return;
3345 4322
… …
3361} 4338}
3362#endif 4339#endif
3363 4340
3364#if EV_IDLE_ENABLE 4341#if EV_IDLE_ENABLE
3365void 4342void
3366ev_idle_start (EV_P_ ev_idle *w) 4343ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3367{ 4344{
3368 if (expect_false (ev_is_active (w))) 4345 if (expect_false (ev_is_active (w)))
3369 return; 4346 return;
3370 4347
3371 pri_adjust (EV_A_ (W)w); 4348 pri_adjust (EV_A_ (W)w);
… …
3384 4361
3385 EV_FREQUENT_CHECK; 4362 EV_FREQUENT_CHECK;
3386} 4363}
3387 4364
3388void 4365void
3389ev_idle_stop (EV_P_ ev_idle *w) 4366ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3390{ 4367{
3391 clear_pending (EV_A_ (W)w); 4368 clear_pending (EV_A_ (W)w);
3392 if (expect_false (!ev_is_active (w))) 4369 if (expect_false (!ev_is_active (w)))
3393 return; 4370 return;
3394 4371
… …
3408} 4385}
3409#endif 4386#endif
3410 4387
3411#if EV_PREPARE_ENABLE 4388#if EV_PREPARE_ENABLE
3412void 4389void
3413ev_prepare_start (EV_P_ ev_prepare *w) 4390ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3414{ 4391{
3415 if (expect_false (ev_is_active (w))) 4392 if (expect_false (ev_is_active (w)))
3416 return; 4393 return;
3417 4394
3418 EV_FREQUENT_CHECK; 4395 EV_FREQUENT_CHECK;
… …
3423 4400
3424 EV_FREQUENT_CHECK; 4401 EV_FREQUENT_CHECK;
3425} 4402}
3426 4403
3427void 4404void
3428ev_prepare_stop (EV_P_ ev_prepare *w) 4405ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3429{ 4406{
3430 clear_pending (EV_A_ (W)w); 4407 clear_pending (EV_A_ (W)w);
3431 if (expect_false (!ev_is_active (w))) 4408 if (expect_false (!ev_is_active (w)))
3432 return; 4409 return;
3433 4410
… …
3446} 4423}
3447#endif 4424#endif
3448 4425
3449#if EV_CHECK_ENABLE 4426#if EV_CHECK_ENABLE
3450void 4427void
3451ev_check_start (EV_P_ ev_check *w) 4428ev_check_start (EV_P_ ev_check *w) EV_THROW
3452{ 4429{
3453 if (expect_false (ev_is_active (w))) 4430 if (expect_false (ev_is_active (w)))
3454 return; 4431 return;
3455 4432
3456 EV_FREQUENT_CHECK; 4433 EV_FREQUENT_CHECK;
… …
3461 4438
3462 EV_FREQUENT_CHECK; 4439 EV_FREQUENT_CHECK;
3463} 4440}
3464 4441
3465void 4442void
3466ev_check_stop (EV_P_ ev_check *w) 4443ev_check_stop (EV_P_ ev_check *w) EV_THROW
3467{ 4444{
3468 clear_pending (EV_A_ (W)w); 4445 clear_pending (EV_A_ (W)w);
3469 if (expect_false (!ev_is_active (w))) 4446 if (expect_false (!ev_is_active (w)))
3470 return; 4447 return;
3471 4448
… …
3484} 4461}
3485#endif 4462#endif
3486 4463
3487#if EV_EMBED_ENABLE 4464#if EV_EMBED_ENABLE
3488void noinline 4465void noinline
3489ev_embed_sweep (EV_P_ ev_embed *w) 4466ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3490{ 4467{
3491 ev_run (w->other, EVRUN_NOWAIT); 4468 ev_run (w->other, EVRUN_NOWAIT);
3492} 4469}
3493 4470
3494static void 4471static void
… …
3542 ev_idle_stop (EV_A_ idle); 4519 ev_idle_stop (EV_A_ idle);
3543} 4520}
3544#endif 4521#endif
3545 4522
3546void 4523void
3547ev_embed_start (EV_P_ ev_embed *w) 4524ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3548{ 4525{
3549 if (expect_false (ev_is_active (w))) 4526 if (expect_false (ev_is_active (w)))
3550 return; 4527 return;
3551 4528
3552 { 4529 {
… …
3573 4550
3574 EV_FREQUENT_CHECK; 4551 EV_FREQUENT_CHECK;
3575} 4552}
3576 4553
3577void 4554void
3578ev_embed_stop (EV_P_ ev_embed *w) 4555ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3579{ 4556{
3580 clear_pending (EV_A_ (W)w); 4557 clear_pending (EV_A_ (W)w);
3581 if (expect_false (!ev_is_active (w))) 4558 if (expect_false (!ev_is_active (w)))
3582 return; 4559 return;
3583 4560
… …
3593} 4570}
3594#endif 4571#endif
3595 4572
3596#if EV_FORK_ENABLE 4573#if EV_FORK_ENABLE
3597void 4574void
3598ev_fork_start (EV_P_ ev_fork *w) 4575ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3599{ 4576{
3600 if (expect_false (ev_is_active (w))) 4577 if (expect_false (ev_is_active (w)))
3601 return; 4578 return;
3602 4579
3603 EV_FREQUENT_CHECK; 4580 EV_FREQUENT_CHECK;
… …
3608 4585
3609 EV_FREQUENT_CHECK; 4586 EV_FREQUENT_CHECK;
3610} 4587}
3611 4588
3612void 4589void
3613ev_fork_stop (EV_P_ ev_fork *w) 4590ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3614{ 4591{
3615 clear_pending (EV_A_ (W)w); 4592 clear_pending (EV_A_ (W)w);
3616 if (expect_false (!ev_is_active (w))) 4593 if (expect_false (!ev_is_active (w)))
3617 return; 4594 return;
3618 4595
… …
3631} 4608}
3632#endif 4609#endif
3633 4610
3634#if EV_CLEANUP_ENABLE 4611#if EV_CLEANUP_ENABLE
3635void 4612void
3636ev_cleanup_start (EV_P_ ev_cleanup *w) 4613ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3637{ 4614{
3638 if (expect_false (ev_is_active (w))) 4615 if (expect_false (ev_is_active (w)))
3639 return; 4616 return;
3640 4617
3641 EV_FREQUENT_CHECK; 4618 EV_FREQUENT_CHECK;
… …
3648 ev_unref (EV_A); 4625 ev_unref (EV_A);
3649 EV_FREQUENT_CHECK; 4626 EV_FREQUENT_CHECK;
3650} 4627}
3651 4628
3652void 4629void
3653ev_cleanup_stop (EV_P_ ev_cleanup *w) 4630ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3654{ 4631{
3655 clear_pending (EV_A_ (W)w); 4632 clear_pending (EV_A_ (W)w);
3656 if (expect_false (!ev_is_active (w))) 4633 if (expect_false (!ev_is_active (w)))
3657 return; 4634 return;
3658 4635
… …
3672} 4649}
3673#endif 4650#endif
3674 4651
3675#if EV_ASYNC_ENABLE 4652#if EV_ASYNC_ENABLE
3676void 4653void
3677ev_async_start (EV_P_ ev_async *w) 4654ev_async_start (EV_P_ ev_async *w) EV_THROW
3678{ 4655{
3679 if (expect_false (ev_is_active (w))) 4656 if (expect_false (ev_is_active (w)))
3680 return; 4657 return;
3681 4658
3682 w->sent = 0; 4659 w->sent = 0;
… …
3691 4668
3692 EV_FREQUENT_CHECK; 4669 EV_FREQUENT_CHECK;
3693} 4670}
3694 4671
3695void 4672void
3696ev_async_stop (EV_P_ ev_async *w) 4673ev_async_stop (EV_P_ ev_async *w) EV_THROW
3697{ 4674{
3698 clear_pending (EV_A_ (W)w); 4675 clear_pending (EV_A_ (W)w);
3699 if (expect_false (!ev_is_active (w))) 4676 if (expect_false (!ev_is_active (w)))
3700 return; 4677 return;
3701 4678
… …
3712 4689
3713 EV_FREQUENT_CHECK; 4690 EV_FREQUENT_CHECK;
3714} 4691}
3715 4692
3716void 4693void
3717ev_async_send (EV_P_ ev_async *w) 4694ev_async_send (EV_P_ ev_async *w) EV_THROW
3718{ 4695{
3719 w->sent = 1; 4696 w->sent = 1;
3720 evpipe_write (EV_A_ &async_pending); 4697 evpipe_write (EV_A_ &async_pending);
3721} 4698}
3722#endif 4699#endif
… …
3759 4736
3760 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4737 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3761} 4738}
3762 4739
3763void 4740void
3764ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4741ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3765{ 4742{
3766 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4743 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3767 4744
3768 if (expect_false (!once)) 4745 if (expect_false (!once))
3769 { 4746 {
… …
3790} 4767}
3791 4768
3792/*****************************************************************************/ 4769/*****************************************************************************/
3793 4770
3794#if EV_WALK_ENABLE 4771#if EV_WALK_ENABLE
3795void 4772void ecb_cold
3796ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4773ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3797{ 4774{
3798 int i, j; 4775 int i, j;
3799 ev_watcher_list *wl, *wn; 4776 ev_watcher_list *wl, *wn;
3800 4777
3801 if (types & (EV_IO | EV_EMBED)) 4778 if (types & (EV_IO | EV_EMBED))
… …
3844 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4821 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3845#endif 4822#endif
3846 4823
3847#if EV_IDLE_ENABLE 4824#if EV_IDLE_ENABLE
3848 if (types & EV_IDLE) 4825 if (types & EV_IDLE)
3849 for (j = NUMPRI; i--; ) 4826 for (j = NUMPRI; j--; )
3850 for (i = idlecnt [j]; i--; ) 4827 for (i = idlecnt [j]; i--; )
3851 cb (EV_A_ EV_IDLE, idles [j][i]); 4828 cb (EV_A_ EV_IDLE, idles [j][i]);
3852#endif 4829#endif
3853 4830
3854#if EV_FORK_ENABLE 4831#if EV_FORK_ENABLE
… …
3907 4884
3908#if EV_MULTIPLICITY 4885#if EV_MULTIPLICITY
3909 #include "ev_wrap.h" 4886 #include "ev_wrap.h"
3910#endif 4887#endif
3911 4888
3912EV_CPP(})
3913

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