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Comparing libev/ev.c (file contents):
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs.
Revision 1.459 by root, Tue Oct 29 12:13:37 2013 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 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
156# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
157# endif 163# endif
158 164
159#endif 165#endif
160 166
161#include <math.h>
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
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
… …
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 (©) 2009-2012 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
513#ifndef ECB_H
514#define ECB_H
515
516/* 16 bits major, 16 bits minor */
517#define ECB_VERSION 0x00010003
518
519#ifdef _WIN32
520 typedef signed char int8_t;
521 typedef unsigned char uint8_t;
522 typedef signed short int16_t;
523 typedef unsigned short uint16_t;
524 typedef signed int int32_t;
525 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 526 #if __GNUC__
464# define expect(expr,value) __builtin_expect ((expr),(value)) 527 typedef signed long long int64_t;
465# define noinline __attribute__ ((noinline)) 528 typedef unsigned long long uint64_t;
529 #else /* _MSC_VER || __BORLANDC__ */
530 typedef signed __int64 int64_t;
531 typedef unsigned __int64 uint64_t;
532 #endif
533 #ifdef _WIN64
534 #define ECB_PTRSIZE 8
535 typedef uint64_t uintptr_t;
536 typedef int64_t intptr_t;
537 #else
538 #define ECB_PTRSIZE 4
539 typedef uint32_t uintptr_t;
540 typedef int32_t intptr_t;
541 #endif
466#else 542#else
467# define expect(expr,value) (expr) 543 #include <inttypes.h>
468# define noinline 544 #if UINTMAX_MAX > 0xffffffffU
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 545 #define ECB_PTRSIZE 8
470# define inline 546 #else
547 #define ECB_PTRSIZE 4
548 #endif
471# endif 549#endif
550
551/* work around x32 idiocy by defining proper macros */
552#if __x86_64 || _M_AMD64
553 #if _ILP32
554 #define ECB_AMD64_X32 1
555 #else
556 #define ECB_AMD64 1
472#endif 557 #endif
558#endif
473 559
560/* many compilers define _GNUC_ to some versions but then only implement
561 * what their idiot authors think are the "more important" extensions,
562 * causing enormous grief in return for some better fake benchmark numbers.
563 * or so.
564 * we try to detect these and simply assume they are not gcc - if they have
565 * an issue with that they should have done it right in the first place.
566 */
567#ifndef ECB_GCC_VERSION
568 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
569 #define ECB_GCC_VERSION(major,minor) 0
570 #else
571 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
572 #endif
573#endif
574
575#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
576#define ECB_C99 (__STDC_VERSION__ >= 199901L)
577#define ECB_C11 (__STDC_VERSION__ >= 201112L)
578#define ECB_CPP (__cplusplus+0)
579#define ECB_CPP11 (__cplusplus >= 201103L)
580
581#if ECB_CPP
582 #define ECB_EXTERN_C extern "C"
583 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
584 #define ECB_EXTERN_C_END }
585#else
586 #define ECB_EXTERN_C extern
587 #define ECB_EXTERN_C_BEG
588 #define ECB_EXTERN_C_END
589#endif
590
591/*****************************************************************************/
592
593/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
594/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
595
596#if ECB_NO_THREADS
597 #define ECB_NO_SMP 1
598#endif
599
600#if ECB_NO_SMP
601 #define ECB_MEMORY_FENCE do { } while (0)
602#endif
603
604#ifndef ECB_MEMORY_FENCE
605 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
606 #if __i386 || __i386__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
608 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
610 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
612 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
613 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
614 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
615 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
616 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
617 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
618 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
619 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
620 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
622 #elif __sparc || __sparc__
623 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
624 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
625 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
626 #elif defined __s390__ || defined __s390x__
627 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
628 #elif defined __mips__
629 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
630 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
631 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
632 #elif defined __alpha__
633 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
634 #elif defined __hppa__
635 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
636 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
637 #elif defined __ia64__
638 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
639 #elif defined __m68k__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
641 #elif defined __m88k__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
643 #elif defined __sh__
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
645 #endif
646 #endif
647#endif
648
649#ifndef ECB_MEMORY_FENCE
650 #if ECB_GCC_VERSION(4,7)
651 /* see comment below (stdatomic.h) about the C11 memory model. */
652 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
653
654 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
655 * without risking compile time errors with other compilers. We *could*
656 * define our own ecb_clang_has_feature, but I just can't be bothered to work
657 * around this shit time and again.
658 * #elif defined __clang && __has_feature (cxx_atomic)
659 * // see comment below (stdatomic.h) about the C11 memory model.
660 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
661 */
662
663 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
664 #define ECB_MEMORY_FENCE __sync_synchronize ()
665 #elif _MSC_VER >= 1400 /* VC++ 2005 */
666 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
667 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
668 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
669 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
670 #elif defined _WIN32
671 #include <WinNT.h>
672 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
673 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
674 #include <mbarrier.h>
675 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
676 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
677 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
678 #elif __xlC__
679 #define ECB_MEMORY_FENCE __sync ()
680 #endif
681#endif
682
683#ifndef ECB_MEMORY_FENCE
684 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
685 /* we assume that these memory fences work on all variables/all memory accesses, */
686 /* not just C11 atomics and atomic accesses */
687 #include <stdatomic.h>
688 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
689 /* any fence other than seq_cst, which isn't very efficient for us. */
690 /* Why that is, we don't know - either the C11 memory model is quite useless */
691 /* for most usages, or gcc and clang have a bug */
692 /* I *currently* lean towards the latter, and inefficiently implement */
693 /* all three of ecb's fences as a seq_cst fence */
694 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
695 #endif
696#endif
697
698#ifndef ECB_MEMORY_FENCE
699 #if !ECB_AVOID_PTHREADS
700 /*
701 * if you get undefined symbol references to pthread_mutex_lock,
702 * or failure to find pthread.h, then you should implement
703 * the ECB_MEMORY_FENCE operations for your cpu/compiler
704 * OR provide pthread.h and link against the posix thread library
705 * of your system.
706 */
707 #include <pthread.h>
708 #define ECB_NEEDS_PTHREADS 1
709 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
710
711 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
712 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
713 #endif
714#endif
715
716#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
717 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
718#endif
719
720#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
721 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
722#endif
723
724/*****************************************************************************/
725
726#if __cplusplus
727 #define ecb_inline static inline
728#elif ECB_GCC_VERSION(2,5)
729 #define ecb_inline static __inline__
730#elif ECB_C99
731 #define ecb_inline static inline
732#else
733 #define ecb_inline static
734#endif
735
736#if ECB_GCC_VERSION(3,3)
737 #define ecb_restrict __restrict__
738#elif ECB_C99
739 #define ecb_restrict restrict
740#else
741 #define ecb_restrict
742#endif
743
744typedef int ecb_bool;
745
746#define ECB_CONCAT_(a, b) a ## b
747#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
748#define ECB_STRINGIFY_(a) # a
749#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
750
751#define ecb_function_ ecb_inline
752
753#if ECB_GCC_VERSION(3,1)
754 #define ecb_attribute(attrlist) __attribute__(attrlist)
755 #define ecb_is_constant(expr) __builtin_constant_p (expr)
756 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
757 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
758#else
759 #define ecb_attribute(attrlist)
760 #define ecb_is_constant(expr) 0
761 #define ecb_expect(expr,value) (expr)
762 #define ecb_prefetch(addr,rw,locality)
763#endif
764
765/* no emulation for ecb_decltype */
766#if ECB_GCC_VERSION(4,5)
767 #define ecb_decltype(x) __decltype(x)
768#elif ECB_GCC_VERSION(3,0)
769 #define ecb_decltype(x) __typeof(x)
770#endif
771
772#define ecb_noinline ecb_attribute ((__noinline__))
773#define ecb_unused ecb_attribute ((__unused__))
774#define ecb_const ecb_attribute ((__const__))
775#define ecb_pure ecb_attribute ((__pure__))
776
777#if ECB_C11
778 #define ecb_noreturn _Noreturn
779#else
780 #define ecb_noreturn ecb_attribute ((__noreturn__))
781#endif
782
783#if ECB_GCC_VERSION(4,3)
784 #define ecb_artificial ecb_attribute ((__artificial__))
785 #define ecb_hot ecb_attribute ((__hot__))
786 #define ecb_cold ecb_attribute ((__cold__))
787#else
788 #define ecb_artificial
789 #define ecb_hot
790 #define ecb_cold
791#endif
792
793/* put around conditional expressions if you are very sure that the */
794/* expression is mostly true or mostly false. note that these return */
795/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 796#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 797#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
798/* for compatibility to the rest of the world */
799#define ecb_likely(expr) ecb_expect_true (expr)
800#define ecb_unlikely(expr) ecb_expect_false (expr)
801
802/* count trailing zero bits and count # of one bits */
803#if ECB_GCC_VERSION(3,4)
804 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
805 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
806 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
807 #define ecb_ctz32(x) __builtin_ctz (x)
808 #define ecb_ctz64(x) __builtin_ctzll (x)
809 #define ecb_popcount32(x) __builtin_popcount (x)
810 /* no popcountll */
811#else
812 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
813 ecb_function_ int
814 ecb_ctz32 (uint32_t x)
815 {
816 int r = 0;
817
818 x &= ~x + 1; /* this isolates the lowest bit */
819
820#if ECB_branchless_on_i386
821 r += !!(x & 0xaaaaaaaa) << 0;
822 r += !!(x & 0xcccccccc) << 1;
823 r += !!(x & 0xf0f0f0f0) << 2;
824 r += !!(x & 0xff00ff00) << 3;
825 r += !!(x & 0xffff0000) << 4;
826#else
827 if (x & 0xaaaaaaaa) r += 1;
828 if (x & 0xcccccccc) r += 2;
829 if (x & 0xf0f0f0f0) r += 4;
830 if (x & 0xff00ff00) r += 8;
831 if (x & 0xffff0000) r += 16;
832#endif
833
834 return r;
835 }
836
837 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
838 ecb_function_ int
839 ecb_ctz64 (uint64_t x)
840 {
841 int shift = x & 0xffffffffU ? 0 : 32;
842 return ecb_ctz32 (x >> shift) + shift;
843 }
844
845 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
846 ecb_function_ int
847 ecb_popcount32 (uint32_t x)
848 {
849 x -= (x >> 1) & 0x55555555;
850 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
851 x = ((x >> 4) + x) & 0x0f0f0f0f;
852 x *= 0x01010101;
853
854 return x >> 24;
855 }
856
857 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
858 ecb_function_ int ecb_ld32 (uint32_t x)
859 {
860 int r = 0;
861
862 if (x >> 16) { x >>= 16; r += 16; }
863 if (x >> 8) { x >>= 8; r += 8; }
864 if (x >> 4) { x >>= 4; r += 4; }
865 if (x >> 2) { x >>= 2; r += 2; }
866 if (x >> 1) { r += 1; }
867
868 return r;
869 }
870
871 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
872 ecb_function_ int ecb_ld64 (uint64_t x)
873 {
874 int r = 0;
875
876 if (x >> 32) { x >>= 32; r += 32; }
877
878 return r + ecb_ld32 (x);
879 }
880#endif
881
882ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
883ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
884ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
885ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
886
887ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
888ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
889{
890 return ( (x * 0x0802U & 0x22110U)
891 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
892}
893
894ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
895ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
896{
897 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
898 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
899 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
900 x = ( x >> 8 ) | ( x << 8);
901
902 return x;
903}
904
905ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
906ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
907{
908 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
909 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
910 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
911 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
912 x = ( x >> 16 ) | ( x << 16);
913
914 return x;
915}
916
917/* popcount64 is only available on 64 bit cpus as gcc builtin */
918/* so for this version we are lazy */
919ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
920ecb_function_ int
921ecb_popcount64 (uint64_t x)
922{
923 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
924}
925
926ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
927ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
928ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
929ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
930ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
931ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
932ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
933ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
934
935ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
936ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
937ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
938ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
939ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
940ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
941ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
942ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
943
944#if ECB_GCC_VERSION(4,3)
945 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
946 #define ecb_bswap32(x) __builtin_bswap32 (x)
947 #define ecb_bswap64(x) __builtin_bswap64 (x)
948#else
949 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
950 ecb_function_ uint16_t
951 ecb_bswap16 (uint16_t x)
952 {
953 return ecb_rotl16 (x, 8);
954 }
955
956 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
957 ecb_function_ uint32_t
958 ecb_bswap32 (uint32_t x)
959 {
960 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
961 }
962
963 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
964 ecb_function_ uint64_t
965 ecb_bswap64 (uint64_t x)
966 {
967 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
968 }
969#endif
970
971#if ECB_GCC_VERSION(4,5)
972 #define ecb_unreachable() __builtin_unreachable ()
973#else
974 /* this seems to work fine, but gcc always emits a warning for it :/ */
975 ecb_inline void ecb_unreachable (void) ecb_noreturn;
976 ecb_inline void ecb_unreachable (void) { }
977#endif
978
979/* try to tell the compiler that some condition is definitely true */
980#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
981
982ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
983ecb_inline unsigned char
984ecb_byteorder_helper (void)
985{
986 /* the union code still generates code under pressure in gcc, */
987 /* but less than using pointers, and always seems to */
988 /* successfully return a constant. */
989 /* the reason why we have this horrible preprocessor mess */
990 /* is to avoid it in all cases, at least on common architectures */
991 /* or when using a recent enough gcc version (>= 4.6) */
992#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
993 return 0x44;
994#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
995 return 0x44;
996#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
997 return 0x11;
998#else
999 union
1000 {
1001 uint32_t i;
1002 uint8_t c;
1003 } u = { 0x11223344 };
1004 return u.c;
1005#endif
1006}
1007
1008ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1009ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1010ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1011ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1012
1013#if ECB_GCC_VERSION(3,0) || ECB_C99
1014 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1015#else
1016 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1017#endif
1018
1019#if __cplusplus
1020 template<typename T>
1021 static inline T ecb_div_rd (T val, T div)
1022 {
1023 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1024 }
1025 template<typename T>
1026 static inline T ecb_div_ru (T val, T div)
1027 {
1028 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1029 }
1030#else
1031 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1032 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1033#endif
1034
1035#if ecb_cplusplus_does_not_suck
1036 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1037 template<typename T, int N>
1038 static inline int ecb_array_length (const T (&arr)[N])
1039 {
1040 return N;
1041 }
1042#else
1043 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1044#endif
1045
1046/*******************************************************************************/
1047/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1048
1049/* basically, everything uses "ieee pure-endian" floating point numbers */
1050/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1051#if 0 \
1052 || __i386 || __i386__ \
1053 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1054 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1055 || defined __arm__ && defined __ARM_EABI__ \
1056 || defined __s390__ || defined __s390x__ \
1057 || defined __mips__ \
1058 || defined __alpha__ \
1059 || defined __hppa__ \
1060 || defined __ia64__ \
1061 || defined __m68k__ \
1062 || defined __m88k__ \
1063 || defined __sh__ \
1064 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1065 #define ECB_STDFP 1
1066 #include <string.h> /* for memcpy */
1067#else
1068 #define ECB_STDFP 0
1069#endif
1070
1071#ifndef ECB_NO_LIBM
1072
1073 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1074
1075 #ifdef NEN
1076 #define ECB_NAN NAN
1077 #else
1078 #define ECB_NAN INFINITY
1079 #endif
1080
1081 /* converts an ieee half/binary16 to a float */
1082 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1083 ecb_function_ float
1084 ecb_binary16_to_float (uint16_t x)
1085 {
1086 int e = (x >> 10) & 0x1f;
1087 int m = x & 0x3ff;
1088 float r;
1089
1090 if (!e ) r = ldexpf (m , -24);
1091 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1092 else if (m ) r = ECB_NAN;
1093 else r = INFINITY;
1094
1095 return x & 0x8000 ? -r : r;
1096 }
1097
1098 /* convert a float to ieee single/binary32 */
1099 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1100 ecb_function_ uint32_t
1101 ecb_float_to_binary32 (float x)
1102 {
1103 uint32_t r;
1104
1105 #if ECB_STDFP
1106 memcpy (&r, &x, 4);
1107 #else
1108 /* slow emulation, works for anything but -0 */
1109 uint32_t m;
1110 int e;
1111
1112 if (x == 0e0f ) return 0x00000000U;
1113 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1114 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1115 if (x != x ) return 0x7fbfffffU;
1116
1117 m = frexpf (x, &e) * 0x1000000U;
1118
1119 r = m & 0x80000000U;
1120
1121 if (r)
1122 m = -m;
1123
1124 if (e <= -126)
1125 {
1126 m &= 0xffffffU;
1127 m >>= (-125 - e);
1128 e = -126;
1129 }
1130
1131 r |= (e + 126) << 23;
1132 r |= m & 0x7fffffU;
1133 #endif
1134
1135 return r;
1136 }
1137
1138 /* converts an ieee single/binary32 to a float */
1139 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1140 ecb_function_ float
1141 ecb_binary32_to_float (uint32_t x)
1142 {
1143 float r;
1144
1145 #if ECB_STDFP
1146 memcpy (&r, &x, 4);
1147 #else
1148 /* emulation, only works for normals and subnormals and +0 */
1149 int neg = x >> 31;
1150 int e = (x >> 23) & 0xffU;
1151
1152 x &= 0x7fffffU;
1153
1154 if (e)
1155 x |= 0x800000U;
1156 else
1157 e = 1;
1158
1159 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1160 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1161
1162 r = neg ? -r : r;
1163 #endif
1164
1165 return r;
1166 }
1167
1168 /* convert a double to ieee double/binary64 */
1169 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1170 ecb_function_ uint64_t
1171 ecb_double_to_binary64 (double x)
1172 {
1173 uint64_t r;
1174
1175 #if ECB_STDFP
1176 memcpy (&r, &x, 8);
1177 #else
1178 /* slow emulation, works for anything but -0 */
1179 uint64_t m;
1180 int e;
1181
1182 if (x == 0e0 ) return 0x0000000000000000U;
1183 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1184 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1185 if (x != x ) return 0X7ff7ffffffffffffU;
1186
1187 m = frexp (x, &e) * 0x20000000000000U;
1188
1189 r = m & 0x8000000000000000;;
1190
1191 if (r)
1192 m = -m;
1193
1194 if (e <= -1022)
1195 {
1196 m &= 0x1fffffffffffffU;
1197 m >>= (-1021 - e);
1198 e = -1022;
1199 }
1200
1201 r |= ((uint64_t)(e + 1022)) << 52;
1202 r |= m & 0xfffffffffffffU;
1203 #endif
1204
1205 return r;
1206 }
1207
1208 /* converts an ieee double/binary64 to a double */
1209 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1210 ecb_function_ double
1211 ecb_binary64_to_double (uint64_t x)
1212 {
1213 double r;
1214
1215 #if ECB_STDFP
1216 memcpy (&r, &x, 8);
1217 #else
1218 /* emulation, only works for normals and subnormals and +0 */
1219 int neg = x >> 63;
1220 int e = (x >> 52) & 0x7ffU;
1221
1222 x &= 0xfffffffffffffU;
1223
1224 if (e)
1225 x |= 0x10000000000000U;
1226 else
1227 e = 1;
1228
1229 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1230 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1231
1232 r = neg ? -r : r;
1233 #endif
1234
1235 return r;
1236 }
1237
1238#endif
1239
1240#endif
1241
1242/* ECB.H END */
1243
1244#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1245/* if your architecture doesn't need memory fences, e.g. because it is
1246 * single-cpu/core, or if you use libev in a project that doesn't use libev
1247 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1248 * libev, in which cases the memory fences become nops.
1249 * alternatively, you can remove this #error and link against libpthread,
1250 * which will then provide the memory fences.
1251 */
1252# error "memory fences not defined for your architecture, please report"
1253#endif
1254
1255#ifndef ECB_MEMORY_FENCE
1256# define ECB_MEMORY_FENCE do { } while (0)
1257# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1258# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1259#endif
1260
1261#define expect_false(cond) ecb_expect_false (cond)
1262#define expect_true(cond) ecb_expect_true (cond)
1263#define noinline ecb_noinline
1264
476#define inline_size static inline 1265#define inline_size ecb_inline
477 1266
478#if EV_FEATURE_CODE 1267#if EV_FEATURE_CODE
479# define inline_speed static inline 1268# define inline_speed ecb_inline
480#else 1269#else
481# define inline_speed static noinline 1270# define inline_speed static noinline
482#endif 1271#endif
483 1272
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1273#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
523# include "ev_win32.c" 1312# include "ev_win32.c"
524#endif 1313#endif
525 1314
526/*****************************************************************************/ 1315/*****************************************************************************/
527 1316
1317/* define a suitable floor function (only used by periodics atm) */
1318
1319#if EV_USE_FLOOR
1320# include <math.h>
1321# define ev_floor(v) floor (v)
1322#else
1323
1324#include <float.h>
1325
1326/* a floor() replacement function, should be independent of ev_tstamp type */
1327static ev_tstamp noinline
1328ev_floor (ev_tstamp v)
1329{
1330 /* the choice of shift factor is not terribly important */
1331#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1332 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1333#else
1334 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1335#endif
1336
1337 /* argument too large for an unsigned long? */
1338 if (expect_false (v >= shift))
1339 {
1340 ev_tstamp f;
1341
1342 if (v == v - 1.)
1343 return v; /* very large number */
1344
1345 f = shift * ev_floor (v * (1. / shift));
1346 return f + ev_floor (v - f);
1347 }
1348
1349 /* special treatment for negative args? */
1350 if (expect_false (v < 0.))
1351 {
1352 ev_tstamp f = -ev_floor (-v);
1353
1354 return f - (f == v ? 0 : 1);
1355 }
1356
1357 /* fits into an unsigned long */
1358 return (unsigned long)v;
1359}
1360
1361#endif
1362
1363/*****************************************************************************/
1364
528#ifdef __linux 1365#ifdef __linux
529# include <sys/utsname.h> 1366# include <sys/utsname.h>
530#endif 1367#endif
531 1368
532static unsigned int noinline 1369static unsigned int noinline ecb_cold
533ev_linux_version (void) 1370ev_linux_version (void)
534{ 1371{
535#ifdef __linux 1372#ifdef __linux
536 unsigned int v = 0; 1373 unsigned int v = 0;
537 struct utsname buf; 1374 struct utsname buf;
… …
566} 1403}
567 1404
568/*****************************************************************************/ 1405/*****************************************************************************/
569 1406
570#if EV_AVOID_STDIO 1407#if EV_AVOID_STDIO
571static void noinline 1408static void noinline ecb_cold
572ev_printerr (const char *msg) 1409ev_printerr (const char *msg)
573{ 1410{
574 write (STDERR_FILENO, msg, strlen (msg)); 1411 write (STDERR_FILENO, msg, strlen (msg));
575} 1412}
576#endif 1413#endif
577 1414
578static void (*syserr_cb)(const char *msg); 1415static void (*syserr_cb)(const char *msg) EV_THROW;
579 1416
580void 1417void ecb_cold
581ev_set_syserr_cb (void (*cb)(const char *msg)) 1418ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
582{ 1419{
583 syserr_cb = cb; 1420 syserr_cb = cb;
584} 1421}
585 1422
586static void noinline 1423static void noinline ecb_cold
587ev_syserr (const char *msg) 1424ev_syserr (const char *msg)
588{ 1425{
589 if (!msg) 1426 if (!msg)
590 msg = "(libev) system error"; 1427 msg = "(libev) system error";
591 1428
… …
604 abort (); 1441 abort ();
605 } 1442 }
606} 1443}
607 1444
608static void * 1445static void *
609ev_realloc_emul (void *ptr, long size) 1446ev_realloc_emul (void *ptr, long size) EV_THROW
610{ 1447{
611#if __GLIBC__
612 return realloc (ptr, size);
613#else
614 /* some systems, notably openbsd and darwin, fail to properly 1448 /* some systems, notably openbsd and darwin, fail to properly
615 * implement realloc (x, 0) (as required by both ansi c-89 and 1449 * implement realloc (x, 0) (as required by both ansi c-89 and
616 * the single unix specification, so work around them here. 1450 * the single unix specification, so work around them here.
1451 * recently, also (at least) fedora and debian started breaking it,
1452 * despite documenting it otherwise.
617 */ 1453 */
618 1454
619 if (size) 1455 if (size)
620 return realloc (ptr, size); 1456 return realloc (ptr, size);
621 1457
622 free (ptr); 1458 free (ptr);
623 return 0; 1459 return 0;
624#endif
625} 1460}
626 1461
627static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1462static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
628 1463
629void 1464void ecb_cold
630ev_set_allocator (void *(*cb)(void *ptr, long size)) 1465ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
631{ 1466{
632 alloc = cb; 1467 alloc = cb;
633} 1468}
634 1469
635inline_speed void * 1470inline_speed void *
… …
723 #undef VAR 1558 #undef VAR
724 }; 1559 };
725 #include "ev_wrap.h" 1560 #include "ev_wrap.h"
726 1561
727 static struct ev_loop default_loop_struct; 1562 static struct ev_loop default_loop_struct;
728 struct ev_loop *ev_default_loop_ptr; 1563 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
729 1564
730#else 1565#else
731 1566
732 ev_tstamp ev_rt_now; 1567 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; 1568 #define VAR(name,decl) static decl;
734 #include "ev_vars.h" 1569 #include "ev_vars.h"
735 #undef VAR 1570 #undef VAR
736 1571
737 static int ev_default_loop_ptr; 1572 static int ev_default_loop_ptr;
… …
752 1587
753/*****************************************************************************/ 1588/*****************************************************************************/
754 1589
755#ifndef EV_HAVE_EV_TIME 1590#ifndef EV_HAVE_EV_TIME
756ev_tstamp 1591ev_tstamp
757ev_time (void) 1592ev_time (void) EV_THROW
758{ 1593{
759#if EV_USE_REALTIME 1594#if EV_USE_REALTIME
760 if (expect_true (have_realtime)) 1595 if (expect_true (have_realtime))
761 { 1596 {
762 struct timespec ts; 1597 struct timespec ts;
… …
786 return ev_time (); 1621 return ev_time ();
787} 1622}
788 1623
789#if EV_MULTIPLICITY 1624#if EV_MULTIPLICITY
790ev_tstamp 1625ev_tstamp
791ev_now (EV_P) 1626ev_now (EV_P) EV_THROW
792{ 1627{
793 return ev_rt_now; 1628 return ev_rt_now;
794} 1629}
795#endif 1630#endif
796 1631
797void 1632void
798ev_sleep (ev_tstamp delay) 1633ev_sleep (ev_tstamp delay) EV_THROW
799{ 1634{
800 if (delay > 0.) 1635 if (delay > 0.)
801 { 1636 {
802#if EV_USE_NANOSLEEP 1637#if EV_USE_NANOSLEEP
803 struct timespec ts; 1638 struct timespec ts;
804 1639
805 EV_TS_SET (ts, delay); 1640 EV_TS_SET (ts, delay);
806 nanosleep (&ts, 0); 1641 nanosleep (&ts, 0);
807#elif defined(_WIN32) 1642#elif defined _WIN32
808 Sleep ((unsigned long)(delay * 1e3)); 1643 Sleep ((unsigned long)(delay * 1e3));
809#else 1644#else
810 struct timeval tv; 1645 struct timeval tv;
811 1646
812 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1647 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
816 select (0, 0, 0, 0, &tv); 1651 select (0, 0, 0, 0, &tv);
817#endif 1652#endif
818 } 1653 }
819} 1654}
820 1655
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/*****************************************************************************/ 1656/*****************************************************************************/
830 1657
831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1658#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
832 1659
833/* find a suitable new size for the given array, */ 1660/* find a suitable new size for the given array, */
… …
839 1666
840 do 1667 do
841 ncur <<= 1; 1668 ncur <<= 1;
842 while (cnt > ncur); 1669 while (cnt > ncur);
843 1670
844 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1671 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1672 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
846 { 1673 {
847 ncur *= elem; 1674 ncur *= elem;
848 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1675 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
849 ncur = ncur - sizeof (void *) * 4; 1676 ncur = ncur - sizeof (void *) * 4;
… …
851 } 1678 }
852 1679
853 return ncur; 1680 return ncur;
854} 1681}
855 1682
856static noinline void * 1683static void * noinline ecb_cold
857array_realloc (int elem, void *base, int *cur, int cnt) 1684array_realloc (int elem, void *base, int *cur, int cnt)
858{ 1685{
859 *cur = array_nextsize (elem, *cur, cnt); 1686 *cur = array_nextsize (elem, *cur, cnt);
860 return ev_realloc (base, elem * *cur); 1687 return ev_realloc (base, elem * *cur);
861} 1688}
… …
864 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1691 memset ((void *)(base), 0, sizeof (*(base)) * (count))
865 1692
866#define array_needsize(type,base,cur,cnt,init) \ 1693#define array_needsize(type,base,cur,cnt,init) \
867 if (expect_false ((cnt) > (cur))) \ 1694 if (expect_false ((cnt) > (cur))) \
868 { \ 1695 { \
869 int ocur_ = (cur); \ 1696 int ecb_unused ocur_ = (cur); \
870 (base) = (type *)array_realloc \ 1697 (base) = (type *)array_realloc \
871 (sizeof (type), (base), &(cur), (cnt)); \ 1698 (sizeof (type), (base), &(cur), (cnt)); \
872 init ((base) + (ocur_), (cur) - ocur_); \ 1699 init ((base) + (ocur_), (cur) - ocur_); \
873 } 1700 }
874 1701
… …
892pendingcb (EV_P_ ev_prepare *w, int revents) 1719pendingcb (EV_P_ ev_prepare *w, int revents)
893{ 1720{
894} 1721}
895 1722
896void noinline 1723void noinline
897ev_feed_event (EV_P_ void *w, int revents) 1724ev_feed_event (EV_P_ void *w, int revents) EV_THROW
898{ 1725{
899 W w_ = (W)w; 1726 W w_ = (W)w;
900 int pri = ABSPRI (w_); 1727 int pri = ABSPRI (w_);
901 1728
902 if (expect_false (w_->pending)) 1729 if (expect_false (w_->pending))
… …
906 w_->pending = ++pendingcnt [pri]; 1733 w_->pending = ++pendingcnt [pri];
907 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1734 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
908 pendings [pri][w_->pending - 1].w = w_; 1735 pendings [pri][w_->pending - 1].w = w_;
909 pendings [pri][w_->pending - 1].events = revents; 1736 pendings [pri][w_->pending - 1].events = revents;
910 } 1737 }
1738
1739 pendingpri = NUMPRI - 1;
911} 1740}
912 1741
913inline_speed void 1742inline_speed void
914feed_reverse (EV_P_ W w) 1743feed_reverse (EV_P_ W w)
915{ 1744{
… …
961 if (expect_true (!anfd->reify)) 1790 if (expect_true (!anfd->reify))
962 fd_event_nocheck (EV_A_ fd, revents); 1791 fd_event_nocheck (EV_A_ fd, revents);
963} 1792}
964 1793
965void 1794void
966ev_feed_fd_event (EV_P_ int fd, int revents) 1795ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
967{ 1796{
968 if (fd >= 0 && fd < anfdmax) 1797 if (fd >= 0 && fd < anfdmax)
969 fd_event_nocheck (EV_A_ fd, revents); 1798 fd_event_nocheck (EV_A_ fd, revents);
970} 1799}
971 1800
… …
974inline_size void 1803inline_size void
975fd_reify (EV_P) 1804fd_reify (EV_P)
976{ 1805{
977 int i; 1806 int i;
978 1807
1808#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1809 for (i = 0; i < fdchangecnt; ++i)
1810 {
1811 int fd = fdchanges [i];
1812 ANFD *anfd = anfds + fd;
1813
1814 if (anfd->reify & EV__IOFDSET && anfd->head)
1815 {
1816 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1817
1818 if (handle != anfd->handle)
1819 {
1820 unsigned long arg;
1821
1822 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1823
1824 /* handle changed, but fd didn't - we need to do it in two steps */
1825 backend_modify (EV_A_ fd, anfd->events, 0);
1826 anfd->events = 0;
1827 anfd->handle = handle;
1828 }
1829 }
1830 }
1831#endif
1832
979 for (i = 0; i < fdchangecnt; ++i) 1833 for (i = 0; i < fdchangecnt; ++i)
980 { 1834 {
981 int fd = fdchanges [i]; 1835 int fd = fdchanges [i];
982 ANFD *anfd = anfds + fd; 1836 ANFD *anfd = anfds + fd;
983 ev_io *w; 1837 ev_io *w;
… …
985 unsigned char o_events = anfd->events; 1839 unsigned char o_events = anfd->events;
986 unsigned char o_reify = anfd->reify; 1840 unsigned char o_reify = anfd->reify;
987 1841
988 anfd->reify = 0; 1842 anfd->reify = 0;
989 1843
990#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
991 if (o_reify & EV__IOFDSET)
992 {
993 unsigned long arg;
994 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
995 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
996 printf ("oi %d %x\n", fd, anfd->handle);//D
997 }
998#endif
999
1000 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1844 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1001 { 1845 {
1002 anfd->events = 0; 1846 anfd->events = 0;
1003 1847
1004 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1848 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1029 fdchanges [fdchangecnt - 1] = fd; 1873 fdchanges [fdchangecnt - 1] = fd;
1030 } 1874 }
1031} 1875}
1032 1876
1033/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1877/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034inline_speed void 1878inline_speed void ecb_cold
1035fd_kill (EV_P_ int fd) 1879fd_kill (EV_P_ int fd)
1036{ 1880{
1037 ev_io *w; 1881 ev_io *w;
1038 1882
1039 while ((w = (ev_io *)anfds [fd].head)) 1883 while ((w = (ev_io *)anfds [fd].head))
… …
1042 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1886 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1043 } 1887 }
1044} 1888}
1045 1889
1046/* check whether the given fd is actually valid, for error recovery */ 1890/* check whether the given fd is actually valid, for error recovery */
1047inline_size int 1891inline_size int ecb_cold
1048fd_valid (int fd) 1892fd_valid (int fd)
1049{ 1893{
1050#ifdef _WIN32 1894#ifdef _WIN32
1051 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1895 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052#else 1896#else
1053 return fcntl (fd, F_GETFD) != -1; 1897 return fcntl (fd, F_GETFD) != -1;
1054#endif 1898#endif
1055} 1899}
1056 1900
1057/* called on EBADF to verify fds */ 1901/* called on EBADF to verify fds */
1058static void noinline 1902static void noinline ecb_cold
1059fd_ebadf (EV_P) 1903fd_ebadf (EV_P)
1060{ 1904{
1061 int fd; 1905 int fd;
1062 1906
1063 for (fd = 0; fd < anfdmax; ++fd) 1907 for (fd = 0; fd < anfdmax; ++fd)
… …
1065 if (!fd_valid (fd) && errno == EBADF) 1909 if (!fd_valid (fd) && errno == EBADF)
1066 fd_kill (EV_A_ fd); 1910 fd_kill (EV_A_ fd);
1067} 1911}
1068 1912
1069/* called on ENOMEM in select/poll to kill some fds and retry */ 1913/* called on ENOMEM in select/poll to kill some fds and retry */
1070static void noinline 1914static void noinline ecb_cold
1071fd_enomem (EV_P) 1915fd_enomem (EV_P)
1072{ 1916{
1073 int fd; 1917 int fd;
1074 1918
1075 for (fd = anfdmax; fd--; ) 1919 for (fd = anfdmax; fd--; )
… …
1270 2114
1271/*****************************************************************************/ 2115/*****************************************************************************/
1272 2116
1273#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2117#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1274 2118
1275static void noinline 2119static void noinline ecb_cold
1276evpipe_init (EV_P) 2120evpipe_init (EV_P)
1277{ 2121{
1278 if (!ev_is_active (&pipe_w)) 2122 if (!ev_is_active (&pipe_w))
1279 { 2123 {
2124 int fds [2];
2125
1280# if EV_USE_EVENTFD 2126# if EV_USE_EVENTFD
2127 fds [0] = -1;
1281 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2128 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1282 if (evfd < 0 && errno == EINVAL) 2129 if (fds [1] < 0 && errno == EINVAL)
1283 evfd = eventfd (0, 0); 2130 fds [1] = eventfd (0, 0);
1284 2131
1285 if (evfd >= 0) 2132 if (fds [1] < 0)
2133# endif
1286 { 2134 {
2135 while (pipe (fds))
2136 ev_syserr ("(libev) error creating signal/async pipe");
2137
2138 fd_intern (fds [0]);
2139 }
2140
1287 evpipe [0] = -1; 2141 evpipe [0] = fds [0];
1288 fd_intern (evfd); /* doing it twice doesn't hurt */ 2142
1289 ev_io_set (&pipe_w, evfd, EV_READ); 2143 if (evpipe [1] < 0)
2144 evpipe [1] = fds [1]; /* first call, set write fd */
2145 else
2146 {
2147 /* on subsequent calls, do not change evpipe [1] */
2148 /* so that evpipe_write can always rely on its value. */
2149 /* this branch does not do anything sensible on windows, */
2150 /* so must not be executed on windows */
2151
2152 dup2 (fds [1], evpipe [1]);
2153 close (fds [1]);
2154 }
2155
2156 fd_intern (evpipe [1]);
2157
2158 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2159 ev_io_start (EV_A_ &pipe_w);
2160 ev_unref (EV_A); /* watcher should not keep loop alive */
2161 }
2162}
2163
2164inline_speed void
2165evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2166{
2167 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2168
2169 if (expect_true (*flag))
2170 return;
2171
2172 *flag = 1;
2173 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2174
2175 pipe_write_skipped = 1;
2176
2177 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2178
2179 if (pipe_write_wanted)
2180 {
2181 int old_errno;
2182
2183 pipe_write_skipped = 0;
2184 ECB_MEMORY_FENCE_RELEASE;
2185
2186 old_errno = errno; /* save errno because write will clobber it */
2187
2188#if EV_USE_EVENTFD
2189 if (evpipe [0] < 0)
2190 {
2191 uint64_t counter = 1;
2192 write (evpipe [1], &counter, sizeof (uint64_t));
1290 } 2193 }
1291 else 2194 else
1292# endif 2195#endif
1293 { 2196 {
1294 while (pipe (evpipe)) 2197#ifdef _WIN32
1295 ev_syserr ("(libev) error creating signal/async pipe"); 2198 WSABUF buf;
1296 2199 DWORD sent;
1297 fd_intern (evpipe [0]); 2200 buf.buf = &buf;
1298 fd_intern (evpipe [1]); 2201 buf.len = 1;
1299 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2202 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2203#else
2204 write (evpipe [1], &(evpipe [1]), 1);
2205#endif
1300 } 2206 }
1301
1302 ev_io_start (EV_A_ &pipe_w);
1303 ev_unref (EV_A); /* watcher should not keep loop alive */
1304 }
1305}
1306
1307inline_size void
1308evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1309{
1310 if (!*flag)
1311 {
1312 int old_errno = errno; /* save errno because write might clobber it */
1313 char dummy;
1314
1315 *flag = 1;
1316
1317#if EV_USE_EVENTFD
1318 if (evfd >= 0)
1319 {
1320 uint64_t counter = 1;
1321 write (evfd, &counter, sizeof (uint64_t));
1322 }
1323 else
1324#endif
1325 /* win32 people keep sending patches that change this write() to send() */
1326 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1327 /* so when you think this write should be a send instead, please find out */
1328 /* where your send() is from - it's definitely not the microsoft send, and */
1329 /* tell me. thank you. */
1330 write (evpipe [1], &dummy, 1);
1331 2207
1332 errno = old_errno; 2208 errno = old_errno;
1333 } 2209 }
1334} 2210}
1335 2211
… …
1338static void 2214static void
1339pipecb (EV_P_ ev_io *iow, int revents) 2215pipecb (EV_P_ ev_io *iow, int revents)
1340{ 2216{
1341 int i; 2217 int i;
1342 2218
2219 if (revents & EV_READ)
2220 {
1343#if EV_USE_EVENTFD 2221#if EV_USE_EVENTFD
1344 if (evfd >= 0) 2222 if (evpipe [0] < 0)
1345 { 2223 {
1346 uint64_t counter; 2224 uint64_t counter;
1347 read (evfd, &counter, sizeof (uint64_t)); 2225 read (evpipe [1], &counter, sizeof (uint64_t));
1348 } 2226 }
1349 else 2227 else
1350#endif 2228#endif
1351 { 2229 {
1352 char dummy; 2230 char dummy[4];
1353 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2231#ifdef _WIN32
2232 WSABUF buf;
2233 DWORD recvd;
2234 DWORD flags = 0;
2235 buf.buf = dummy;
2236 buf.len = sizeof (dummy);
2237 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2238#else
1354 read (evpipe [0], &dummy, 1); 2239 read (evpipe [0], &dummy, sizeof (dummy));
2240#endif
2241 }
1355 } 2242 }
2243
2244 pipe_write_skipped = 0;
2245
2246 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1356 2247
1357#if EV_SIGNAL_ENABLE 2248#if EV_SIGNAL_ENABLE
1358 if (sig_pending) 2249 if (sig_pending)
1359 { 2250 {
1360 sig_pending = 0; 2251 sig_pending = 0;
2252
2253 ECB_MEMORY_FENCE;
1361 2254
1362 for (i = EV_NSIG - 1; i--; ) 2255 for (i = EV_NSIG - 1; i--; )
1363 if (expect_false (signals [i].pending)) 2256 if (expect_false (signals [i].pending))
1364 ev_feed_signal_event (EV_A_ i + 1); 2257 ev_feed_signal_event (EV_A_ i + 1);
1365 } 2258 }
… …
1367 2260
1368#if EV_ASYNC_ENABLE 2261#if EV_ASYNC_ENABLE
1369 if (async_pending) 2262 if (async_pending)
1370 { 2263 {
1371 async_pending = 0; 2264 async_pending = 0;
2265
2266 ECB_MEMORY_FENCE;
1372 2267
1373 for (i = asynccnt; i--; ) 2268 for (i = asynccnt; i--; )
1374 if (asyncs [i]->sent) 2269 if (asyncs [i]->sent)
1375 { 2270 {
1376 asyncs [i]->sent = 0; 2271 asyncs [i]->sent = 0;
2272 ECB_MEMORY_FENCE_RELEASE;
1377 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2273 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1378 } 2274 }
1379 } 2275 }
1380#endif 2276#endif
1381} 2277}
1382 2278
1383/*****************************************************************************/ 2279/*****************************************************************************/
1384 2280
1385void 2281void
1386ev_feed_signal (int signum) 2282ev_feed_signal (int signum) EV_THROW
1387{ 2283{
1388#if EV_MULTIPLICITY 2284#if EV_MULTIPLICITY
2285 EV_P;
2286 ECB_MEMORY_FENCE_ACQUIRE;
1389 EV_P = signals [signum - 1].loop; 2287 EV_A = signals [signum - 1].loop;
1390 2288
1391 if (!EV_A) 2289 if (!EV_A)
1392 return; 2290 return;
1393#endif 2291#endif
1394 2292
… …
1405 2303
1406 ev_feed_signal (signum); 2304 ev_feed_signal (signum);
1407} 2305}
1408 2306
1409void noinline 2307void noinline
1410ev_feed_signal_event (EV_P_ int signum) 2308ev_feed_signal_event (EV_P_ int signum) EV_THROW
1411{ 2309{
1412 WL w; 2310 WL w;
1413 2311
1414 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2312 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1415 return; 2313 return;
1416 2314
1417 --signum; 2315 --signum;
1418 2316
1419#if EV_MULTIPLICITY 2317#if EV_MULTIPLICITY
… …
1423 if (expect_false (signals [signum].loop != EV_A)) 2321 if (expect_false (signals [signum].loop != EV_A))
1424 return; 2322 return;
1425#endif 2323#endif
1426 2324
1427 signals [signum].pending = 0; 2325 signals [signum].pending = 0;
2326 ECB_MEMORY_FENCE_RELEASE;
1428 2327
1429 for (w = signals [signum].head; w; w = w->next) 2328 for (w = signals [signum].head; w; w = w->next)
1430 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2329 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1431} 2330}
1432 2331
… …
1530#endif 2429#endif
1531#if EV_USE_SELECT 2430#if EV_USE_SELECT
1532# include "ev_select.c" 2431# include "ev_select.c"
1533#endif 2432#endif
1534 2433
1535int 2434int ecb_cold
1536ev_version_major (void) 2435ev_version_major (void) EV_THROW
1537{ 2436{
1538 return EV_VERSION_MAJOR; 2437 return EV_VERSION_MAJOR;
1539} 2438}
1540 2439
1541int 2440int ecb_cold
1542ev_version_minor (void) 2441ev_version_minor (void) EV_THROW
1543{ 2442{
1544 return EV_VERSION_MINOR; 2443 return EV_VERSION_MINOR;
1545} 2444}
1546 2445
1547/* return true if we are running with elevated privileges and should ignore env variables */ 2446/* return true if we are running with elevated privileges and should ignore env variables */
1548int inline_size 2447int inline_size ecb_cold
1549enable_secure (void) 2448enable_secure (void)
1550{ 2449{
1551#ifdef _WIN32 2450#ifdef _WIN32
1552 return 0; 2451 return 0;
1553#else 2452#else
1554 return getuid () != geteuid () 2453 return getuid () != geteuid ()
1555 || getgid () != getegid (); 2454 || getgid () != getegid ();
1556#endif 2455#endif
1557} 2456}
1558 2457
1559unsigned int 2458unsigned int ecb_cold
1560ev_supported_backends (void) 2459ev_supported_backends (void) EV_THROW
1561{ 2460{
1562 unsigned int flags = 0; 2461 unsigned int flags = 0;
1563 2462
1564 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2463 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1565 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2464 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1568 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2467 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1569 2468
1570 return flags; 2469 return flags;
1571} 2470}
1572 2471
1573unsigned int 2472unsigned int ecb_cold
1574ev_recommended_backends (void) 2473ev_recommended_backends (void) EV_THROW
1575{ 2474{
1576 unsigned int flags = ev_supported_backends (); 2475 unsigned int flags = ev_supported_backends ();
1577 2476
1578#ifndef __NetBSD__ 2477#ifndef __NetBSD__
1579 /* kqueue is borked on everything but netbsd apparently */ 2478 /* kqueue is borked on everything but netbsd apparently */
… …
1590#endif 2489#endif
1591 2490
1592 return flags; 2491 return flags;
1593} 2492}
1594 2493
1595unsigned int 2494unsigned int ecb_cold
1596ev_embeddable_backends (void) 2495ev_embeddable_backends (void) EV_THROW
1597{ 2496{
1598 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2497 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1599 2498
1600 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2499 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1601 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2500 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1603 2502
1604 return flags; 2503 return flags;
1605} 2504}
1606 2505
1607unsigned int 2506unsigned int
1608ev_backend (EV_P) 2507ev_backend (EV_P) EV_THROW
1609{ 2508{
1610 return backend; 2509 return backend;
1611} 2510}
1612 2511
1613#if EV_FEATURE_API 2512#if EV_FEATURE_API
1614unsigned int 2513unsigned int
1615ev_iteration (EV_P) 2514ev_iteration (EV_P) EV_THROW
1616{ 2515{
1617 return loop_count; 2516 return loop_count;
1618} 2517}
1619 2518
1620unsigned int 2519unsigned int
1621ev_depth (EV_P) 2520ev_depth (EV_P) EV_THROW
1622{ 2521{
1623 return loop_depth; 2522 return loop_depth;
1624} 2523}
1625 2524
1626void 2525void
1627ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2526ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1628{ 2527{
1629 io_blocktime = interval; 2528 io_blocktime = interval;
1630} 2529}
1631 2530
1632void 2531void
1633ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2532ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1634{ 2533{
1635 timeout_blocktime = interval; 2534 timeout_blocktime = interval;
1636} 2535}
1637 2536
1638void 2537void
1639ev_set_userdata (EV_P_ void *data) 2538ev_set_userdata (EV_P_ void *data) EV_THROW
1640{ 2539{
1641 userdata = data; 2540 userdata = data;
1642} 2541}
1643 2542
1644void * 2543void *
1645ev_userdata (EV_P) 2544ev_userdata (EV_P) EV_THROW
1646{ 2545{
1647 return userdata; 2546 return userdata;
1648} 2547}
1649 2548
2549void
1650void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2550ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1651{ 2551{
1652 invoke_cb = invoke_pending_cb; 2552 invoke_cb = invoke_pending_cb;
1653} 2553}
1654 2554
2555void
1655void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2556ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1656{ 2557{
1657 release_cb = release; 2558 release_cb = release;
1658 acquire_cb = acquire; 2559 acquire_cb = acquire;
1659} 2560}
1660#endif 2561#endif
1661 2562
1662/* initialise a loop structure, must be zero-initialised */ 2563/* initialise a loop structure, must be zero-initialised */
1663static void noinline 2564static void noinline ecb_cold
1664loop_init (EV_P_ unsigned int flags) 2565loop_init (EV_P_ unsigned int flags) EV_THROW
1665{ 2566{
1666 if (!backend) 2567 if (!backend)
1667 { 2568 {
1668 origflags = flags; 2569 origflags = flags;
1669 2570
… …
1696 if (!(flags & EVFLAG_NOENV) 2597 if (!(flags & EVFLAG_NOENV)
1697 && !enable_secure () 2598 && !enable_secure ()
1698 && getenv ("LIBEV_FLAGS")) 2599 && getenv ("LIBEV_FLAGS"))
1699 flags = atoi (getenv ("LIBEV_FLAGS")); 2600 flags = atoi (getenv ("LIBEV_FLAGS"));
1700 2601
1701 ev_rt_now = ev_time (); 2602 ev_rt_now = ev_time ();
1702 mn_now = get_clock (); 2603 mn_now = get_clock ();
1703 now_floor = mn_now; 2604 now_floor = mn_now;
1704 rtmn_diff = ev_rt_now - mn_now; 2605 rtmn_diff = ev_rt_now - mn_now;
1705#if EV_FEATURE_API 2606#if EV_FEATURE_API
1706 invoke_cb = ev_invoke_pending; 2607 invoke_cb = ev_invoke_pending;
1707#endif 2608#endif
1708 2609
1709 io_blocktime = 0.; 2610 io_blocktime = 0.;
1710 timeout_blocktime = 0.; 2611 timeout_blocktime = 0.;
1711 backend = 0; 2612 backend = 0;
1712 backend_fd = -1; 2613 backend_fd = -1;
1713 sig_pending = 0; 2614 sig_pending = 0;
1714#if EV_ASYNC_ENABLE 2615#if EV_ASYNC_ENABLE
1715 async_pending = 0; 2616 async_pending = 0;
1716#endif 2617#endif
2618 pipe_write_skipped = 0;
2619 pipe_write_wanted = 0;
2620 evpipe [0] = -1;
2621 evpipe [1] = -1;
1717#if EV_USE_INOTIFY 2622#if EV_USE_INOTIFY
1718 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2623 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719#endif 2624#endif
1720#if EV_USE_SIGNALFD 2625#if EV_USE_SIGNALFD
1721 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2626 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722#endif 2627#endif
1723 2628
1724 if (!(flags & EVBACKEND_MASK)) 2629 if (!(flags & EVBACKEND_MASK))
1725 flags |= ev_recommended_backends (); 2630 flags |= ev_recommended_backends ();
1726 2631
… …
1751#endif 2656#endif
1752 } 2657 }
1753} 2658}
1754 2659
1755/* free up a loop structure */ 2660/* free up a loop structure */
1756void 2661void ecb_cold
1757ev_loop_destroy (EV_P) 2662ev_loop_destroy (EV_P)
1758{ 2663{
1759 int i; 2664 int i;
1760 2665
1761#if EV_MULTIPLICITY 2666#if EV_MULTIPLICITY
… …
1772 EV_INVOKE_PENDING; 2677 EV_INVOKE_PENDING;
1773 } 2678 }
1774#endif 2679#endif
1775 2680
1776#if EV_CHILD_ENABLE 2681#if EV_CHILD_ENABLE
1777 if (ev_is_active (&childev)) 2682 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1778 { 2683 {
1779 ev_ref (EV_A); /* child watcher */ 2684 ev_ref (EV_A); /* child watcher */
1780 ev_signal_stop (EV_A_ &childev); 2685 ev_signal_stop (EV_A_ &childev);
1781 } 2686 }
1782#endif 2687#endif
… …
1784 if (ev_is_active (&pipe_w)) 2689 if (ev_is_active (&pipe_w))
1785 { 2690 {
1786 /*ev_ref (EV_A);*/ 2691 /*ev_ref (EV_A);*/
1787 /*ev_io_stop (EV_A_ &pipe_w);*/ 2692 /*ev_io_stop (EV_A_ &pipe_w);*/
1788 2693
1789#if EV_USE_EVENTFD
1790 if (evfd >= 0)
1791 close (evfd);
1792#endif
1793
1794 if (evpipe [0] >= 0)
1795 {
1796 EV_WIN32_CLOSE_FD (evpipe [0]); 2694 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1797 EV_WIN32_CLOSE_FD (evpipe [1]); 2695 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1798 }
1799 } 2696 }
1800 2697
1801#if EV_USE_SIGNALFD 2698#if EV_USE_SIGNALFD
1802 if (ev_is_active (&sigfd_w)) 2699 if (ev_is_active (&sigfd_w))
1803 close (sigfd); 2700 close (sigfd);
… …
1889#endif 2786#endif
1890#if EV_USE_INOTIFY 2787#if EV_USE_INOTIFY
1891 infy_fork (EV_A); 2788 infy_fork (EV_A);
1892#endif 2789#endif
1893 2790
2791#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1894 if (ev_is_active (&pipe_w)) 2792 if (ev_is_active (&pipe_w))
1895 { 2793 {
1896 /* this "locks" the handlers against writing to the pipe */ 2794 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1897 /* while we modify the fd vars */
1898 sig_pending = 1;
1899#if EV_ASYNC_ENABLE
1900 async_pending = 1;
1901#endif
1902 2795
1903 ev_ref (EV_A); 2796 ev_ref (EV_A);
1904 ev_io_stop (EV_A_ &pipe_w); 2797 ev_io_stop (EV_A_ &pipe_w);
1905 2798
1906#if EV_USE_EVENTFD
1907 if (evfd >= 0)
1908 close (evfd);
1909#endif
1910
1911 if (evpipe [0] >= 0) 2799 if (evpipe [0] >= 0)
1912 {
1913 EV_WIN32_CLOSE_FD (evpipe [0]); 2800 EV_WIN32_CLOSE_FD (evpipe [0]);
1914 EV_WIN32_CLOSE_FD (evpipe [1]);
1915 }
1916 2801
1917#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1918 evpipe_init (EV_A); 2802 evpipe_init (EV_A);
1919 /* now iterate over everything, in case we missed something */ 2803 /* iterate over everything, in case we missed something before */
1920 pipecb (EV_A_ &pipe_w, EV_READ); 2804 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1921#endif
1922 } 2805 }
2806#endif
1923 2807
1924 postfork = 0; 2808 postfork = 0;
1925} 2809}
1926 2810
1927#if EV_MULTIPLICITY 2811#if EV_MULTIPLICITY
1928 2812
1929struct ev_loop * 2813struct ev_loop * ecb_cold
1930ev_loop_new (unsigned int flags) 2814ev_loop_new (unsigned int flags) EV_THROW
1931{ 2815{
1932 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2816 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933 2817
1934 memset (EV_A, 0, sizeof (struct ev_loop)); 2818 memset (EV_A, 0, sizeof (struct ev_loop));
1935 loop_init (EV_A_ flags); 2819 loop_init (EV_A_ flags);
… …
1942} 2826}
1943 2827
1944#endif /* multiplicity */ 2828#endif /* multiplicity */
1945 2829
1946#if EV_VERIFY 2830#if EV_VERIFY
1947static void noinline 2831static void noinline ecb_cold
1948verify_watcher (EV_P_ W w) 2832verify_watcher (EV_P_ W w)
1949{ 2833{
1950 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2834 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951 2835
1952 if (w->pending) 2836 if (w->pending)
1953 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2837 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954} 2838}
1955 2839
1956static void noinline 2840static void noinline ecb_cold
1957verify_heap (EV_P_ ANHE *heap, int N) 2841verify_heap (EV_P_ ANHE *heap, int N)
1958{ 2842{
1959 int i; 2843 int i;
1960 2844
1961 for (i = HEAP0; i < N + HEAP0; ++i) 2845 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1966 2850
1967 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2851 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968 } 2852 }
1969} 2853}
1970 2854
1971static void noinline 2855static void noinline ecb_cold
1972array_verify (EV_P_ W *ws, int cnt) 2856array_verify (EV_P_ W *ws, int cnt)
1973{ 2857{
1974 while (cnt--) 2858 while (cnt--)
1975 { 2859 {
1976 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2860 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1978 } 2862 }
1979} 2863}
1980#endif 2864#endif
1981 2865
1982#if EV_FEATURE_API 2866#if EV_FEATURE_API
1983void 2867void ecb_cold
1984ev_verify (EV_P) 2868ev_verify (EV_P) EV_THROW
1985{ 2869{
1986#if EV_VERIFY 2870#if EV_VERIFY
1987 int i; 2871 int i;
1988 WL w; 2872 WL w, w2;
1989 2873
1990 assert (activecnt >= -1); 2874 assert (activecnt >= -1);
1991 2875
1992 assert (fdchangemax >= fdchangecnt); 2876 assert (fdchangemax >= fdchangecnt);
1993 for (i = 0; i < fdchangecnt; ++i) 2877 for (i = 0; i < fdchangecnt; ++i)
1994 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2878 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1995 2879
1996 assert (anfdmax >= 0); 2880 assert (anfdmax >= 0);
1997 for (i = 0; i < anfdmax; ++i) 2881 for (i = 0; i < anfdmax; ++i)
2882 {
2883 int j = 0;
2884
1998 for (w = anfds [i].head; w; w = w->next) 2885 for (w = w2 = anfds [i].head; w; w = w->next)
1999 { 2886 {
2000 verify_watcher (EV_A_ (W)w); 2887 verify_watcher (EV_A_ (W)w);
2888
2889 if (j++ & 1)
2890 {
2891 assert (("libev: io watcher list contains a loop", w != w2));
2892 w2 = w2->next;
2893 }
2894
2001 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2895 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2002 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2896 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2003 } 2897 }
2898 }
2004 2899
2005 assert (timermax >= timercnt); 2900 assert (timermax >= timercnt);
2006 verify_heap (EV_A_ timers, timercnt); 2901 verify_heap (EV_A_ timers, timercnt);
2007 2902
2008#if EV_PERIODIC_ENABLE 2903#if EV_PERIODIC_ENABLE
… …
2054#endif 2949#endif
2055} 2950}
2056#endif 2951#endif
2057 2952
2058#if EV_MULTIPLICITY 2953#if EV_MULTIPLICITY
2059struct ev_loop * 2954struct ev_loop * ecb_cold
2060#else 2955#else
2061int 2956int
2062#endif 2957#endif
2063ev_default_loop (unsigned int flags) 2958ev_default_loop (unsigned int flags) EV_THROW
2064{ 2959{
2065 if (!ev_default_loop_ptr) 2960 if (!ev_default_loop_ptr)
2066 { 2961 {
2067#if EV_MULTIPLICITY 2962#if EV_MULTIPLICITY
2068 EV_P = ev_default_loop_ptr = &default_loop_struct; 2963 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2087 2982
2088 return ev_default_loop_ptr; 2983 return ev_default_loop_ptr;
2089} 2984}
2090 2985
2091void 2986void
2092ev_loop_fork (EV_P) 2987ev_loop_fork (EV_P) EV_THROW
2093{ 2988{
2094 postfork = 1; /* must be in line with ev_default_fork */ 2989 postfork = 1;
2095} 2990}
2096 2991
2097/*****************************************************************************/ 2992/*****************************************************************************/
2098 2993
2099void 2994void
… …
2101{ 2996{
2102 EV_CB_INVOKE ((W)w, revents); 2997 EV_CB_INVOKE ((W)w, revents);
2103} 2998}
2104 2999
2105unsigned int 3000unsigned int
2106ev_pending_count (EV_P) 3001ev_pending_count (EV_P) EV_THROW
2107{ 3002{
2108 int pri; 3003 int pri;
2109 unsigned int count = 0; 3004 unsigned int count = 0;
2110 3005
2111 for (pri = NUMPRI; pri--; ) 3006 for (pri = NUMPRI; pri--; )
… …
2115} 3010}
2116 3011
2117void noinline 3012void noinline
2118ev_invoke_pending (EV_P) 3013ev_invoke_pending (EV_P)
2119{ 3014{
2120 int pri; 3015 pendingpri = NUMPRI;
2121 3016
2122 for (pri = NUMPRI; pri--; ) 3017 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3018 {
3019 --pendingpri;
3020
2123 while (pendingcnt [pri]) 3021 while (pendingcnt [pendingpri])
2124 { 3022 {
2125 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3023 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2126 3024
2127 p->w->pending = 0; 3025 p->w->pending = 0;
2128 EV_CB_INVOKE (p->w, p->events); 3026 EV_CB_INVOKE (p->w, p->events);
2129 EV_FREQUENT_CHECK; 3027 EV_FREQUENT_CHECK;
2130 } 3028 }
3029 }
2131} 3030}
2132 3031
2133#if EV_IDLE_ENABLE 3032#if EV_IDLE_ENABLE
2134/* make idle watchers pending. this handles the "call-idle */ 3033/* make idle watchers pending. this handles the "call-idle */
2135/* only when higher priorities are idle" logic */ 3034/* only when higher priorities are idle" logic */
… …
2193 } 3092 }
2194} 3093}
2195 3094
2196#if EV_PERIODIC_ENABLE 3095#if EV_PERIODIC_ENABLE
2197 3096
2198inline_speed 3097static void noinline
2199periodic_recalc (EV_P_ ev_periodic *w) 3098periodic_recalc (EV_P_ ev_periodic *w)
2200{ 3099{
2201 /* TODO: use slow but potentially more correct incremental algo, */ 3100 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202 /* also do not rely on ceil */ 3101 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2203 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3102
3103 /* the above almost always errs on the low side */
3104 while (at <= ev_rt_now)
3105 {
3106 ev_tstamp nat = at + w->interval;
3107
3108 /* when resolution fails us, we use ev_rt_now */
3109 if (expect_false (nat == at))
3110 {
3111 at = ev_rt_now;
3112 break;
3113 }
3114
3115 at = nat;
3116 }
3117
3118 ev_at (w) = at;
2204} 3119}
2205 3120
2206/* make periodics pending */ 3121/* make periodics pending */
2207inline_size void 3122inline_size void
2208periodics_reify (EV_P) 3123periodics_reify (EV_P)
2209{ 3124{
2210 EV_FREQUENT_CHECK; 3125 EV_FREQUENT_CHECK;
2211 3126
2212 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3127 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2213 { 3128 {
2214 int feed_count = 0;
2215
2216 do 3129 do
2217 { 3130 {
2218 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2219 3132
2220 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2230 downheap (periodics, periodiccnt, HEAP0); 3143 downheap (periodics, periodiccnt, HEAP0);
2231 } 3144 }
2232 else if (w->interval) 3145 else if (w->interval)
2233 { 3146 {
2234 periodic_recalc (EV_A_ w); 3147 periodic_recalc (EV_A_ w);
2235
2236 /* if next trigger time is not sufficiently in the future, put it there */
2237 /* this might happen because of floating point inexactness */
2238 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2239 {
2240 ev_at (w) += w->interval;
2241
2242 /* if interval is unreasonably low we might still have a time in the past */
2243 /* so correct this. this will make the periodic very inexact, but the user */
2244 /* has effectively asked to get triggered more often than possible */
2245 if (ev_at (w) < ev_rt_now)
2246 ev_at (w) = ev_rt_now;
2247 }
2248
2249 ANHE_at_cache (periodics [HEAP0]); 3148 ANHE_at_cache (periodics [HEAP0]);
2250 downheap (periodics, periodiccnt, HEAP0); 3149 downheap (periodics, periodiccnt, HEAP0);
2251 } 3150 }
2252 else 3151 else
2253 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3152 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2261 } 3160 }
2262} 3161}
2263 3162
2264/* simply recalculate all periodics */ 3163/* simply recalculate all periodics */
2265/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3164/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266static void noinline 3165static void noinline ecb_cold
2267periodics_reschedule (EV_P) 3166periodics_reschedule (EV_P)
2268{ 3167{
2269 int i; 3168 int i;
2270 3169
2271 /* adjust periodics after time jump */ 3170 /* adjust periodics after time jump */
… …
2284 reheap (periodics, periodiccnt); 3183 reheap (periodics, periodiccnt);
2285} 3184}
2286#endif 3185#endif
2287 3186
2288/* adjust all timers by a given offset */ 3187/* adjust all timers by a given offset */
2289static void noinline 3188static void noinline ecb_cold
2290timers_reschedule (EV_P_ ev_tstamp adjust) 3189timers_reschedule (EV_P_ ev_tstamp adjust)
2291{ 3190{
2292 int i; 3191 int i;
2293 3192
2294 for (i = 0; i < timercnt; ++i) 3193 for (i = 0; i < timercnt; ++i)
… …
2331 * doesn't hurt either as we only do this on time-jumps or 3230 * doesn't hurt either as we only do this on time-jumps or
2332 * in the unlikely event of having been preempted here. 3231 * in the unlikely event of having been preempted here.
2333 */ 3232 */
2334 for (i = 4; --i; ) 3233 for (i = 4; --i; )
2335 { 3234 {
3235 ev_tstamp diff;
2336 rtmn_diff = ev_rt_now - mn_now; 3236 rtmn_diff = ev_rt_now - mn_now;
2337 3237
3238 diff = odiff - rtmn_diff;
3239
2338 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3240 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2339 return; /* all is well */ 3241 return; /* all is well */
2340 3242
2341 ev_rt_now = ev_time (); 3243 ev_rt_now = ev_time ();
2342 mn_now = get_clock (); 3244 mn_now = get_clock ();
2343 now_floor = mn_now; 3245 now_floor = mn_now;
… …
2365 3267
2366 mn_now = ev_rt_now; 3268 mn_now = ev_rt_now;
2367 } 3269 }
2368} 3270}
2369 3271
2370void 3272int
2371ev_run (EV_P_ int flags) 3273ev_run (EV_P_ int flags)
2372{ 3274{
2373#if EV_FEATURE_API 3275#if EV_FEATURE_API
2374 ++loop_depth; 3276 ++loop_depth;
2375#endif 3277#endif
… …
2433 ev_tstamp prev_mn_now = mn_now; 3335 ev_tstamp prev_mn_now = mn_now;
2434 3336
2435 /* update time to cancel out callback processing overhead */ 3337 /* update time to cancel out callback processing overhead */
2436 time_update (EV_A_ 1e100); 3338 time_update (EV_A_ 1e100);
2437 3339
3340 /* from now on, we want a pipe-wake-up */
3341 pipe_write_wanted = 1;
3342
3343 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3344
2438 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3345 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2439 { 3346 {
2440 waittime = MAX_BLOCKTIME; 3347 waittime = MAX_BLOCKTIME;
2441 3348
2442 if (timercnt) 3349 if (timercnt)
2443 { 3350 {
2444 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3351 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445 if (waittime > to) waittime = to; 3352 if (waittime > to) waittime = to;
2446 } 3353 }
2447 3354
2448#if EV_PERIODIC_ENABLE 3355#if EV_PERIODIC_ENABLE
2449 if (periodiccnt) 3356 if (periodiccnt)
2450 { 3357 {
2451 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3358 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452 if (waittime > to) waittime = to; 3359 if (waittime > to) waittime = to;
2453 } 3360 }
2454#endif 3361#endif
2455 3362
2456 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3363 /* don't let timeouts decrease the waittime below timeout_blocktime */
2457 if (expect_false (waittime < timeout_blocktime)) 3364 if (expect_false (waittime < timeout_blocktime))
2458 waittime = timeout_blocktime; 3365 waittime = timeout_blocktime;
3366
3367 /* at this point, we NEED to wait, so we have to ensure */
3368 /* to pass a minimum nonzero value to the backend */
3369 if (expect_false (waittime < backend_mintime))
3370 waittime = backend_mintime;
2459 3371
2460 /* extra check because io_blocktime is commonly 0 */ 3372 /* extra check because io_blocktime is commonly 0 */
2461 if (expect_false (io_blocktime)) 3373 if (expect_false (io_blocktime))
2462 { 3374 {
2463 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3375 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464 3376
2465 if (sleeptime > waittime - backend_fudge) 3377 if (sleeptime > waittime - backend_mintime)
2466 sleeptime = waittime - backend_fudge; 3378 sleeptime = waittime - backend_mintime;
2467 3379
2468 if (expect_true (sleeptime > 0.)) 3380 if (expect_true (sleeptime > 0.))
2469 { 3381 {
2470 ev_sleep (sleeptime); 3382 ev_sleep (sleeptime);
2471 waittime -= sleeptime; 3383 waittime -= sleeptime;
… …
2478#endif 3390#endif
2479 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480 backend_poll (EV_A_ waittime); 3392 backend_poll (EV_A_ waittime);
2481 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2482 3394
3395 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3396
3397 ECB_MEMORY_FENCE_ACQUIRE;
3398 if (pipe_write_skipped)
3399 {
3400 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3401 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3402 }
3403
3404
2483 /* update ev_rt_now, do magic */ 3405 /* update ev_rt_now, do magic */
2484 time_update (EV_A_ waittime + sleeptime); 3406 time_update (EV_A_ waittime + sleeptime);
2485 } 3407 }
2486 3408
2487 /* queue pending timers and reschedule them */ 3409 /* queue pending timers and reschedule them */
… …
2513 loop_done = EVBREAK_CANCEL; 3435 loop_done = EVBREAK_CANCEL;
2514 3436
2515#if EV_FEATURE_API 3437#if EV_FEATURE_API
2516 --loop_depth; 3438 --loop_depth;
2517#endif 3439#endif
3440
3441 return activecnt;
2518} 3442}
2519 3443
2520void 3444void
2521ev_break (EV_P_ int how) 3445ev_break (EV_P_ int how) EV_THROW
2522{ 3446{
2523 loop_done = how; 3447 loop_done = how;
2524} 3448}
2525 3449
2526void 3450void
2527ev_ref (EV_P) 3451ev_ref (EV_P) EV_THROW
2528{ 3452{
2529 ++activecnt; 3453 ++activecnt;
2530} 3454}
2531 3455
2532void 3456void
2533ev_unref (EV_P) 3457ev_unref (EV_P) EV_THROW
2534{ 3458{
2535 --activecnt; 3459 --activecnt;
2536} 3460}
2537 3461
2538void 3462void
2539ev_now_update (EV_P) 3463ev_now_update (EV_P) EV_THROW
2540{ 3464{
2541 time_update (EV_A_ 1e100); 3465 time_update (EV_A_ 1e100);
2542} 3466}
2543 3467
2544void 3468void
2545ev_suspend (EV_P) 3469ev_suspend (EV_P) EV_THROW
2546{ 3470{
2547 ev_now_update (EV_A); 3471 ev_now_update (EV_A);
2548} 3472}
2549 3473
2550void 3474void
2551ev_resume (EV_P) 3475ev_resume (EV_P) EV_THROW
2552{ 3476{
2553 ev_tstamp mn_prev = mn_now; 3477 ev_tstamp mn_prev = mn_now;
2554 3478
2555 ev_now_update (EV_A); 3479 ev_now_update (EV_A);
2556 timers_reschedule (EV_A_ mn_now - mn_prev); 3480 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2595 w->pending = 0; 3519 w->pending = 0;
2596 } 3520 }
2597} 3521}
2598 3522
2599int 3523int
2600ev_clear_pending (EV_P_ void *w) 3524ev_clear_pending (EV_P_ void *w) EV_THROW
2601{ 3525{
2602 W w_ = (W)w; 3526 W w_ = (W)w;
2603 int pending = w_->pending; 3527 int pending = w_->pending;
2604 3528
2605 if (expect_true (pending)) 3529 if (expect_true (pending))
… …
2638} 3562}
2639 3563
2640/*****************************************************************************/ 3564/*****************************************************************************/
2641 3565
2642void noinline 3566void noinline
2643ev_io_start (EV_P_ ev_io *w) 3567ev_io_start (EV_P_ ev_io *w) EV_THROW
2644{ 3568{
2645 int fd = w->fd; 3569 int fd = w->fd;
2646 3570
2647 if (expect_false (ev_is_active (w))) 3571 if (expect_false (ev_is_active (w)))
2648 return; 3572 return;
… …
2654 3578
2655 ev_start (EV_A_ (W)w, 1); 3579 ev_start (EV_A_ (W)w, 1);
2656 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3580 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2657 wlist_add (&anfds[fd].head, (WL)w); 3581 wlist_add (&anfds[fd].head, (WL)w);
2658 3582
3583 /* common bug, apparently */
3584 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3585
2659 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3586 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2660 w->events &= ~EV__IOFDSET; 3587 w->events &= ~EV__IOFDSET;
2661 3588
2662 EV_FREQUENT_CHECK; 3589 EV_FREQUENT_CHECK;
2663} 3590}
2664 3591
2665void noinline 3592void noinline
2666ev_io_stop (EV_P_ ev_io *w) 3593ev_io_stop (EV_P_ ev_io *w) EV_THROW
2667{ 3594{
2668 clear_pending (EV_A_ (W)w); 3595 clear_pending (EV_A_ (W)w);
2669 if (expect_false (!ev_is_active (w))) 3596 if (expect_false (!ev_is_active (w)))
2670 return; 3597 return;
2671 3598
… …
2680 3607
2681 EV_FREQUENT_CHECK; 3608 EV_FREQUENT_CHECK;
2682} 3609}
2683 3610
2684void noinline 3611void noinline
2685ev_timer_start (EV_P_ ev_timer *w) 3612ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2686{ 3613{
2687 if (expect_false (ev_is_active (w))) 3614 if (expect_false (ev_is_active (w)))
2688 return; 3615 return;
2689 3616
2690 ev_at (w) += mn_now; 3617 ev_at (w) += mn_now;
… …
2704 3631
2705 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3632 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2706} 3633}
2707 3634
2708void noinline 3635void noinline
2709ev_timer_stop (EV_P_ ev_timer *w) 3636ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2710{ 3637{
2711 clear_pending (EV_A_ (W)w); 3638 clear_pending (EV_A_ (W)w);
2712 if (expect_false (!ev_is_active (w))) 3639 if (expect_false (!ev_is_active (w)))
2713 return; 3640 return;
2714 3641
… …
2734 3661
2735 EV_FREQUENT_CHECK; 3662 EV_FREQUENT_CHECK;
2736} 3663}
2737 3664
2738void noinline 3665void noinline
2739ev_timer_again (EV_P_ ev_timer *w) 3666ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2740{ 3667{
2741 EV_FREQUENT_CHECK; 3668 EV_FREQUENT_CHECK;
3669
3670 clear_pending (EV_A_ (W)w);
2742 3671
2743 if (ev_is_active (w)) 3672 if (ev_is_active (w))
2744 { 3673 {
2745 if (w->repeat) 3674 if (w->repeat)
2746 { 3675 {
… …
2759 3688
2760 EV_FREQUENT_CHECK; 3689 EV_FREQUENT_CHECK;
2761} 3690}
2762 3691
2763ev_tstamp 3692ev_tstamp
2764ev_timer_remaining (EV_P_ ev_timer *w) 3693ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2765{ 3694{
2766 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3695 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2767} 3696}
2768 3697
2769#if EV_PERIODIC_ENABLE 3698#if EV_PERIODIC_ENABLE
2770void noinline 3699void noinline
2771ev_periodic_start (EV_P_ ev_periodic *w) 3700ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2772{ 3701{
2773 if (expect_false (ev_is_active (w))) 3702 if (expect_false (ev_is_active (w)))
2774 return; 3703 return;
2775 3704
2776 if (w->reschedule_cb) 3705 if (w->reschedule_cb)
… …
2796 3725
2797 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3726 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2798} 3727}
2799 3728
2800void noinline 3729void noinline
2801ev_periodic_stop (EV_P_ ev_periodic *w) 3730ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2802{ 3731{
2803 clear_pending (EV_A_ (W)w); 3732 clear_pending (EV_A_ (W)w);
2804 if (expect_false (!ev_is_active (w))) 3733 if (expect_false (!ev_is_active (w)))
2805 return; 3734 return;
2806 3735
… …
2824 3753
2825 EV_FREQUENT_CHECK; 3754 EV_FREQUENT_CHECK;
2826} 3755}
2827 3756
2828void noinline 3757void noinline
2829ev_periodic_again (EV_P_ ev_periodic *w) 3758ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2830{ 3759{
2831 /* TODO: use adjustheap and recalculation */ 3760 /* TODO: use adjustheap and recalculation */
2832 ev_periodic_stop (EV_A_ w); 3761 ev_periodic_stop (EV_A_ w);
2833 ev_periodic_start (EV_A_ w); 3762 ev_periodic_start (EV_A_ w);
2834} 3763}
… …
2839#endif 3768#endif
2840 3769
2841#if EV_SIGNAL_ENABLE 3770#if EV_SIGNAL_ENABLE
2842 3771
2843void noinline 3772void noinline
2844ev_signal_start (EV_P_ ev_signal *w) 3773ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2845{ 3774{
2846 if (expect_false (ev_is_active (w))) 3775 if (expect_false (ev_is_active (w)))
2847 return; 3776 return;
2848 3777
2849 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3778 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2851#if EV_MULTIPLICITY 3780#if EV_MULTIPLICITY
2852 assert (("libev: a signal must not be attached to two different loops", 3781 assert (("libev: a signal must not be attached to two different loops",
2853 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3782 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2854 3783
2855 signals [w->signum - 1].loop = EV_A; 3784 signals [w->signum - 1].loop = EV_A;
3785 ECB_MEMORY_FENCE_RELEASE;
2856#endif 3786#endif
2857 3787
2858 EV_FREQUENT_CHECK; 3788 EV_FREQUENT_CHECK;
2859 3789
2860#if EV_USE_SIGNALFD 3790#if EV_USE_SIGNALFD
… …
2920 3850
2921 EV_FREQUENT_CHECK; 3851 EV_FREQUENT_CHECK;
2922} 3852}
2923 3853
2924void noinline 3854void noinline
2925ev_signal_stop (EV_P_ ev_signal *w) 3855ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2926{ 3856{
2927 clear_pending (EV_A_ (W)w); 3857 clear_pending (EV_A_ (W)w);
2928 if (expect_false (!ev_is_active (w))) 3858 if (expect_false (!ev_is_active (w)))
2929 return; 3859 return;
2930 3860
… …
2961#endif 3891#endif
2962 3892
2963#if EV_CHILD_ENABLE 3893#if EV_CHILD_ENABLE
2964 3894
2965void 3895void
2966ev_child_start (EV_P_ ev_child *w) 3896ev_child_start (EV_P_ ev_child *w) EV_THROW
2967{ 3897{
2968#if EV_MULTIPLICITY 3898#if EV_MULTIPLICITY
2969 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3899 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2970#endif 3900#endif
2971 if (expect_false (ev_is_active (w))) 3901 if (expect_false (ev_is_active (w)))
… …
2978 3908
2979 EV_FREQUENT_CHECK; 3909 EV_FREQUENT_CHECK;
2980} 3910}
2981 3911
2982void 3912void
2983ev_child_stop (EV_P_ ev_child *w) 3913ev_child_stop (EV_P_ ev_child *w) EV_THROW
2984{ 3914{
2985 clear_pending (EV_A_ (W)w); 3915 clear_pending (EV_A_ (W)w);
2986 if (expect_false (!ev_is_active (w))) 3916 if (expect_false (!ev_is_active (w)))
2987 return; 3917 return;
2988 3918
… …
3015# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3945# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3016 3946
3017static void noinline 3947static void noinline
3018infy_add (EV_P_ ev_stat *w) 3948infy_add (EV_P_ ev_stat *w)
3019{ 3949{
3020 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); 3950 w->wd = inotify_add_watch (fs_fd, w->path,
3951 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3952 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3953 | IN_DONT_FOLLOW | IN_MASK_ADD);
3021 3954
3022 if (w->wd >= 0) 3955 if (w->wd >= 0)
3023 { 3956 {
3024 struct statfs sfs; 3957 struct statfs sfs;
3025 3958
… …
3029 3962
3030 if (!fs_2625) 3963 if (!fs_2625)
3031 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3964 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3032 else if (!statfs (w->path, &sfs) 3965 else if (!statfs (w->path, &sfs)
3033 && (sfs.f_type == 0x1373 /* devfs */ 3966 && (sfs.f_type == 0x1373 /* devfs */
3967 || sfs.f_type == 0x4006 /* fat */
3968 || sfs.f_type == 0x4d44 /* msdos */
3034 || sfs.f_type == 0xEF53 /* ext2/3 */ 3969 || sfs.f_type == 0xEF53 /* ext2/3 */
3970 || sfs.f_type == 0x72b6 /* jffs2 */
3971 || sfs.f_type == 0x858458f6 /* ramfs */
3972 || sfs.f_type == 0x5346544e /* ntfs */
3035 || sfs.f_type == 0x3153464a /* jfs */ 3973 || sfs.f_type == 0x3153464a /* jfs */
3974 || sfs.f_type == 0x9123683e /* btrfs */
3036 || sfs.f_type == 0x52654973 /* reiser3 */ 3975 || sfs.f_type == 0x52654973 /* reiser3 */
3037 || sfs.f_type == 0x01021994 /* tempfs */ 3976 || sfs.f_type == 0x01021994 /* tmpfs */
3038 || sfs.f_type == 0x58465342 /* xfs */)) 3977 || sfs.f_type == 0x58465342 /* xfs */))
3039 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3978 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3040 else 3979 else
3041 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3980 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3042 } 3981 }
… …
3063 if (!pend || pend == path) 4002 if (!pend || pend == path)
3064 break; 4003 break;
3065 4004
3066 *pend = 0; 4005 *pend = 0;
3067 w->wd = inotify_add_watch (fs_fd, path, mask); 4006 w->wd = inotify_add_watch (fs_fd, path, mask);
3068 } 4007 }
3069 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4008 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3070 } 4009 }
3071 } 4010 }
3072 4011
3073 if (w->wd >= 0) 4012 if (w->wd >= 0)
… …
3140 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4079 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141 ofs += sizeof (struct inotify_event) + ev->len; 4080 ofs += sizeof (struct inotify_event) + ev->len;
3142 } 4081 }
3143} 4082}
3144 4083
3145inline_size void 4084inline_size void ecb_cold
3146ev_check_2625 (EV_P) 4085ev_check_2625 (EV_P)
3147{ 4086{
3148 /* kernels < 2.6.25 are borked 4087 /* kernels < 2.6.25 are borked
3149 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4088 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150 */ 4089 */
… …
3155} 4094}
3156 4095
3157inline_size int 4096inline_size int
3158infy_newfd (void) 4097infy_newfd (void)
3159{ 4098{
3160#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4099#if defined IN_CLOEXEC && defined IN_NONBLOCK
3161 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4100 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3162 if (fd >= 0) 4101 if (fd >= 0)
3163 return fd; 4102 return fd;
3164#endif 4103#endif
3165 return inotify_init (); 4104 return inotify_init ();
… …
3240#else 4179#else
3241# define EV_LSTAT(p,b) lstat (p, b) 4180# define EV_LSTAT(p,b) lstat (p, b)
3242#endif 4181#endif
3243 4182
3244void 4183void
3245ev_stat_stat (EV_P_ ev_stat *w) 4184ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3246{ 4185{
3247 if (lstat (w->path, &w->attr) < 0) 4186 if (lstat (w->path, &w->attr) < 0)
3248 w->attr.st_nlink = 0; 4187 w->attr.st_nlink = 0;
3249 else if (!w->attr.st_nlink) 4188 else if (!w->attr.st_nlink)
3250 w->attr.st_nlink = 1; 4189 w->attr.st_nlink = 1;
… …
3289 ev_feed_event (EV_A_ w, EV_STAT); 4228 ev_feed_event (EV_A_ w, EV_STAT);
3290 } 4229 }
3291} 4230}
3292 4231
3293void 4232void
3294ev_stat_start (EV_P_ ev_stat *w) 4233ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3295{ 4234{
3296 if (expect_false (ev_is_active (w))) 4235 if (expect_false (ev_is_active (w)))
3297 return; 4236 return;
3298 4237
3299 ev_stat_stat (EV_A_ w); 4238 ev_stat_stat (EV_A_ w);
… …
3320 4259
3321 EV_FREQUENT_CHECK; 4260 EV_FREQUENT_CHECK;
3322} 4261}
3323 4262
3324void 4263void
3325ev_stat_stop (EV_P_ ev_stat *w) 4264ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3326{ 4265{
3327 clear_pending (EV_A_ (W)w); 4266 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w))) 4267 if (expect_false (!ev_is_active (w)))
3329 return; 4268 return;
3330 4269
… …
3346} 4285}
3347#endif 4286#endif
3348 4287
3349#if EV_IDLE_ENABLE 4288#if EV_IDLE_ENABLE
3350void 4289void
3351ev_idle_start (EV_P_ ev_idle *w) 4290ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3352{ 4291{
3353 if (expect_false (ev_is_active (w))) 4292 if (expect_false (ev_is_active (w)))
3354 return; 4293 return;
3355 4294
3356 pri_adjust (EV_A_ (W)w); 4295 pri_adjust (EV_A_ (W)w);
… …
3369 4308
3370 EV_FREQUENT_CHECK; 4309 EV_FREQUENT_CHECK;
3371} 4310}
3372 4311
3373void 4312void
3374ev_idle_stop (EV_P_ ev_idle *w) 4313ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3375{ 4314{
3376 clear_pending (EV_A_ (W)w); 4315 clear_pending (EV_A_ (W)w);
3377 if (expect_false (!ev_is_active (w))) 4316 if (expect_false (!ev_is_active (w)))
3378 return; 4317 return;
3379 4318
… …
3393} 4332}
3394#endif 4333#endif
3395 4334
3396#if EV_PREPARE_ENABLE 4335#if EV_PREPARE_ENABLE
3397void 4336void
3398ev_prepare_start (EV_P_ ev_prepare *w) 4337ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3399{ 4338{
3400 if (expect_false (ev_is_active (w))) 4339 if (expect_false (ev_is_active (w)))
3401 return; 4340 return;
3402 4341
3403 EV_FREQUENT_CHECK; 4342 EV_FREQUENT_CHECK;
… …
3408 4347
3409 EV_FREQUENT_CHECK; 4348 EV_FREQUENT_CHECK;
3410} 4349}
3411 4350
3412void 4351void
3413ev_prepare_stop (EV_P_ ev_prepare *w) 4352ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3414{ 4353{
3415 clear_pending (EV_A_ (W)w); 4354 clear_pending (EV_A_ (W)w);
3416 if (expect_false (!ev_is_active (w))) 4355 if (expect_false (!ev_is_active (w)))
3417 return; 4356 return;
3418 4357
… …
3431} 4370}
3432#endif 4371#endif
3433 4372
3434#if EV_CHECK_ENABLE 4373#if EV_CHECK_ENABLE
3435void 4374void
3436ev_check_start (EV_P_ ev_check *w) 4375ev_check_start (EV_P_ ev_check *w) EV_THROW
3437{ 4376{
3438 if (expect_false (ev_is_active (w))) 4377 if (expect_false (ev_is_active (w)))
3439 return; 4378 return;
3440 4379
3441 EV_FREQUENT_CHECK; 4380 EV_FREQUENT_CHECK;
… …
3446 4385
3447 EV_FREQUENT_CHECK; 4386 EV_FREQUENT_CHECK;
3448} 4387}
3449 4388
3450void 4389void
3451ev_check_stop (EV_P_ ev_check *w) 4390ev_check_stop (EV_P_ ev_check *w) EV_THROW
3452{ 4391{
3453 clear_pending (EV_A_ (W)w); 4392 clear_pending (EV_A_ (W)w);
3454 if (expect_false (!ev_is_active (w))) 4393 if (expect_false (!ev_is_active (w)))
3455 return; 4394 return;
3456 4395
… …
3469} 4408}
3470#endif 4409#endif
3471 4410
3472#if EV_EMBED_ENABLE 4411#if EV_EMBED_ENABLE
3473void noinline 4412void noinline
3474ev_embed_sweep (EV_P_ ev_embed *w) 4413ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3475{ 4414{
3476 ev_run (w->other, EVRUN_NOWAIT); 4415 ev_run (w->other, EVRUN_NOWAIT);
3477} 4416}
3478 4417
3479static void 4418static void
… …
3527 ev_idle_stop (EV_A_ idle); 4466 ev_idle_stop (EV_A_ idle);
3528} 4467}
3529#endif 4468#endif
3530 4469
3531void 4470void
3532ev_embed_start (EV_P_ ev_embed *w) 4471ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3533{ 4472{
3534 if (expect_false (ev_is_active (w))) 4473 if (expect_false (ev_is_active (w)))
3535 return; 4474 return;
3536 4475
3537 { 4476 {
… …
3558 4497
3559 EV_FREQUENT_CHECK; 4498 EV_FREQUENT_CHECK;
3560} 4499}
3561 4500
3562void 4501void
3563ev_embed_stop (EV_P_ ev_embed *w) 4502ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3564{ 4503{
3565 clear_pending (EV_A_ (W)w); 4504 clear_pending (EV_A_ (W)w);
3566 if (expect_false (!ev_is_active (w))) 4505 if (expect_false (!ev_is_active (w)))
3567 return; 4506 return;
3568 4507
… …
3578} 4517}
3579#endif 4518#endif
3580 4519
3581#if EV_FORK_ENABLE 4520#if EV_FORK_ENABLE
3582void 4521void
3583ev_fork_start (EV_P_ ev_fork *w) 4522ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3584{ 4523{
3585 if (expect_false (ev_is_active (w))) 4524 if (expect_false (ev_is_active (w)))
3586 return; 4525 return;
3587 4526
3588 EV_FREQUENT_CHECK; 4527 EV_FREQUENT_CHECK;
… …
3593 4532
3594 EV_FREQUENT_CHECK; 4533 EV_FREQUENT_CHECK;
3595} 4534}
3596 4535
3597void 4536void
3598ev_fork_stop (EV_P_ ev_fork *w) 4537ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3599{ 4538{
3600 clear_pending (EV_A_ (W)w); 4539 clear_pending (EV_A_ (W)w);
3601 if (expect_false (!ev_is_active (w))) 4540 if (expect_false (!ev_is_active (w)))
3602 return; 4541 return;
3603 4542
… …
3616} 4555}
3617#endif 4556#endif
3618 4557
3619#if EV_CLEANUP_ENABLE 4558#if EV_CLEANUP_ENABLE
3620void 4559void
3621ev_cleanup_start (EV_P_ ev_cleanup *w) 4560ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3622{ 4561{
3623 if (expect_false (ev_is_active (w))) 4562 if (expect_false (ev_is_active (w)))
3624 return; 4563 return;
3625 4564
3626 EV_FREQUENT_CHECK; 4565 EV_FREQUENT_CHECK;
… …
3633 ev_unref (EV_A); 4572 ev_unref (EV_A);
3634 EV_FREQUENT_CHECK; 4573 EV_FREQUENT_CHECK;
3635} 4574}
3636 4575
3637void 4576void
3638ev_cleanup_stop (EV_P_ ev_cleanup *w) 4577ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3639{ 4578{
3640 clear_pending (EV_A_ (W)w); 4579 clear_pending (EV_A_ (W)w);
3641 if (expect_false (!ev_is_active (w))) 4580 if (expect_false (!ev_is_active (w)))
3642 return; 4581 return;
3643 4582
… …
3657} 4596}
3658#endif 4597#endif
3659 4598
3660#if EV_ASYNC_ENABLE 4599#if EV_ASYNC_ENABLE
3661void 4600void
3662ev_async_start (EV_P_ ev_async *w) 4601ev_async_start (EV_P_ ev_async *w) EV_THROW
3663{ 4602{
3664 if (expect_false (ev_is_active (w))) 4603 if (expect_false (ev_is_active (w)))
3665 return; 4604 return;
3666 4605
3667 w->sent = 0; 4606 w->sent = 0;
… …
3676 4615
3677 EV_FREQUENT_CHECK; 4616 EV_FREQUENT_CHECK;
3678} 4617}
3679 4618
3680void 4619void
3681ev_async_stop (EV_P_ ev_async *w) 4620ev_async_stop (EV_P_ ev_async *w) EV_THROW
3682{ 4621{
3683 clear_pending (EV_A_ (W)w); 4622 clear_pending (EV_A_ (W)w);
3684 if (expect_false (!ev_is_active (w))) 4623 if (expect_false (!ev_is_active (w)))
3685 return; 4624 return;
3686 4625
… …
3697 4636
3698 EV_FREQUENT_CHECK; 4637 EV_FREQUENT_CHECK;
3699} 4638}
3700 4639
3701void 4640void
3702ev_async_send (EV_P_ ev_async *w) 4641ev_async_send (EV_P_ ev_async *w) EV_THROW
3703{ 4642{
3704 w->sent = 1; 4643 w->sent = 1;
3705 evpipe_write (EV_A_ &async_pending); 4644 evpipe_write (EV_A_ &async_pending);
3706} 4645}
3707#endif 4646#endif
… …
3744 4683
3745 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4684 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3746} 4685}
3747 4686
3748void 4687void
3749ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4688ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3750{ 4689{
3751 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4690 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3752 4691
3753 if (expect_false (!once)) 4692 if (expect_false (!once))
3754 { 4693 {
… …
3775} 4714}
3776 4715
3777/*****************************************************************************/ 4716/*****************************************************************************/
3778 4717
3779#if EV_WALK_ENABLE 4718#if EV_WALK_ENABLE
3780void 4719void ecb_cold
3781ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4720ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3782{ 4721{
3783 int i, j; 4722 int i, j;
3784 ev_watcher_list *wl, *wn; 4723 ev_watcher_list *wl, *wn;
3785 4724
3786 if (types & (EV_IO | EV_EMBED)) 4725 if (types & (EV_IO | EV_EMBED))
… …
3829 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4768 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3830#endif 4769#endif
3831 4770
3832#if EV_IDLE_ENABLE 4771#if EV_IDLE_ENABLE
3833 if (types & EV_IDLE) 4772 if (types & EV_IDLE)
3834 for (j = NUMPRI; i--; ) 4773 for (j = NUMPRI; j--; )
3835 for (i = idlecnt [j]; i--; ) 4774 for (i = idlecnt [j]; i--; )
3836 cb (EV_A_ EV_IDLE, idles [j][i]); 4775 cb (EV_A_ EV_IDLE, idles [j][i]);
3837#endif 4776#endif
3838 4777
3839#if EV_FORK_ENABLE 4778#if EV_FORK_ENABLE
… …
3892 4831
3893#if EV_MULTIPLICITY 4832#if EV_MULTIPLICITY
3894 #include "ev_wrap.h" 4833 #include "ev_wrap.h"
3895#endif 4834#endif
3896 4835
3897EV_CPP(})
3898

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