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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 1.462 by root, Sun Jan 5 02:59:36 2014 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 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 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 256# else
241# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
242# endif 258# endif
243#endif 259#endif
244 260
245#ifndef EV_USE_MONOTONIC 261#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 262# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 263# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 264# else
249# define EV_USE_MONOTONIC 0 265# define EV_USE_MONOTONIC 0
250# endif 266# endif
251#endif 267#endif
… …
338 354
339#ifndef EV_HEAP_CACHE_AT 355#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 356# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 357#endif
342 358
359#ifdef ANDROID
360/* supposedly, android doesn't typedef fd_mask */
361# undef EV_USE_SELECT
362# define EV_USE_SELECT 0
363/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
364# undef EV_USE_CLOCK_SYSCALL
365# define EV_USE_CLOCK_SYSCALL 0
366#endif
367
368/* aix's poll.h seems to cause lots of trouble */
369#ifdef _AIX
370/* AIX has a completely broken poll.h header */
371# undef EV_USE_POLL
372# define EV_USE_POLL 0
373#endif
374
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 375/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 376/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 377#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 378# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 379# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 380# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 381# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 382# define EV_USE_MONOTONIC 1
351# else 383# else
… …
354# endif 386# endif
355#endif 387#endif
356 388
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 389/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 390
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 391#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 392# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 393# define EV_USE_MONOTONIC 0
368#endif 394#endif
369 395
… …
377# define EV_USE_INOTIFY 0 403# define EV_USE_INOTIFY 0
378#endif 404#endif
379 405
380#if !EV_USE_NANOSLEEP 406#if !EV_USE_NANOSLEEP
381/* hp-ux has it in sys/time.h, which we unconditionally include above */ 407/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux) 408# if !defined _WIN32 && !defined __hpux
383# include <sys/select.h> 409# include <sys/select.h>
384# endif 410# endif
385#endif 411#endif
386 412
387#if EV_USE_INOTIFY 413#if EV_USE_INOTIFY
… …
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 416/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 417# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 418# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 419# define EV_USE_INOTIFY 0
394# endif 420# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 421#endif
400 422
401#if EV_USE_EVENTFD 423#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 424/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 425# include <stdint.h>
… …
443#else 465#else
444# define EV_FREQUENT_CHECK do { } while (0) 466# define EV_FREQUENT_CHECK do { } while (0)
445#endif 467#endif
446 468
447/* 469/*
448 * This is used to avoid floating point rounding problems. 470 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 471 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 472 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 473#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
474/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 475
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 476#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 477#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 478
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 479#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 480#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 481
482/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
483/* ECB.H BEGIN */
484/*
485 * libecb - http://software.schmorp.de/pkg/libecb
486 *
487 * Copyright (©) 2009-2013 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 __amd64 || __x86_64 || _M_AMD64 || _M_X64
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__) && !__sparcv8
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 >= 1500 /* VC++ 2008 */
666 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
667 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
668 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
669 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
670 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
671 #elif _MSC_VER >= 1400 /* VC++ 2005 */
672 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
673 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
674 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
675 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
676 #elif defined _WIN32
677 #include <WinNT.h>
678 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
679 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
680 #include <mbarrier.h>
681 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
682 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
683 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
684 #elif __xlC__
685 #define ECB_MEMORY_FENCE __sync ()
686 #endif
687#endif
688
689#ifndef ECB_MEMORY_FENCE
690 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
691 /* we assume that these memory fences work on all variables/all memory accesses, */
692 /* not just C11 atomics and atomic accesses */
693 #include <stdatomic.h>
694 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
695 /* any fence other than seq_cst, which isn't very efficient for us. */
696 /* Why that is, we don't know - either the C11 memory model is quite useless */
697 /* for most usages, or gcc and clang have a bug */
698 /* I *currently* lean towards the latter, and inefficiently implement */
699 /* all three of ecb's fences as a seq_cst fence */
700 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
701 #endif
702#endif
703
704#ifndef ECB_MEMORY_FENCE
705 #if !ECB_AVOID_PTHREADS
706 /*
707 * if you get undefined symbol references to pthread_mutex_lock,
708 * or failure to find pthread.h, then you should implement
709 * the ECB_MEMORY_FENCE operations for your cpu/compiler
710 * OR provide pthread.h and link against the posix thread library
711 * of your system.
712 */
713 #include <pthread.h>
714 #define ECB_NEEDS_PTHREADS 1
715 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
716
717 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
718 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
719 #endif
720#endif
721
722#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
723 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
724#endif
725
726#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
727 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
728#endif
729
730/*****************************************************************************/
731
732#if __cplusplus
733 #define ecb_inline static inline
734#elif ECB_GCC_VERSION(2,5)
735 #define ecb_inline static __inline__
736#elif ECB_C99
737 #define ecb_inline static inline
738#else
739 #define ecb_inline static
740#endif
741
742#if ECB_GCC_VERSION(3,3)
743 #define ecb_restrict __restrict__
744#elif ECB_C99
745 #define ecb_restrict restrict
746#else
747 #define ecb_restrict
748#endif
749
750typedef int ecb_bool;
751
752#define ECB_CONCAT_(a, b) a ## b
753#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
754#define ECB_STRINGIFY_(a) # a
755#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
756
757#define ecb_function_ ecb_inline
758
759#if ECB_GCC_VERSION(3,1)
760 #define ecb_attribute(attrlist) __attribute__(attrlist)
761 #define ecb_is_constant(expr) __builtin_constant_p (expr)
762 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
763 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
764#else
765 #define ecb_attribute(attrlist)
766 #define ecb_is_constant(expr) 0
767 #define ecb_expect(expr,value) (expr)
768 #define ecb_prefetch(addr,rw,locality)
769#endif
770
771/* no emulation for ecb_decltype */
772#if ECB_GCC_VERSION(4,5)
773 #define ecb_decltype(x) __decltype(x)
774#elif ECB_GCC_VERSION(3,0)
775 #define ecb_decltype(x) __typeof(x)
776#endif
777
778#define ecb_noinline ecb_attribute ((__noinline__))
779#define ecb_unused ecb_attribute ((__unused__))
780#define ecb_const ecb_attribute ((__const__))
781#define ecb_pure ecb_attribute ((__pure__))
782
783#if ECB_C11
784 #define ecb_noreturn _Noreturn
785#else
786 #define ecb_noreturn ecb_attribute ((__noreturn__))
787#endif
788
789#if ECB_GCC_VERSION(4,3)
790 #define ecb_artificial ecb_attribute ((__artificial__))
791 #define ecb_hot ecb_attribute ((__hot__))
792 #define ecb_cold ecb_attribute ((__cold__))
793#else
794 #define ecb_artificial
795 #define ecb_hot
796 #define ecb_cold
797#endif
798
799/* put around conditional expressions if you are very sure that the */
800/* expression is mostly true or mostly false. note that these return */
801/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 802#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 803#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
804/* for compatibility to the rest of the world */
805#define ecb_likely(expr) ecb_expect_true (expr)
806#define ecb_unlikely(expr) ecb_expect_false (expr)
807
808/* count trailing zero bits and count # of one bits */
809#if ECB_GCC_VERSION(3,4)
810 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
811 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
812 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
813 #define ecb_ctz32(x) __builtin_ctz (x)
814 #define ecb_ctz64(x) __builtin_ctzll (x)
815 #define ecb_popcount32(x) __builtin_popcount (x)
816 /* no popcountll */
817#else
818 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
819 ecb_function_ int
820 ecb_ctz32 (uint32_t x)
821 {
822 int r = 0;
823
824 x &= ~x + 1; /* this isolates the lowest bit */
825
826#if ECB_branchless_on_i386
827 r += !!(x & 0xaaaaaaaa) << 0;
828 r += !!(x & 0xcccccccc) << 1;
829 r += !!(x & 0xf0f0f0f0) << 2;
830 r += !!(x & 0xff00ff00) << 3;
831 r += !!(x & 0xffff0000) << 4;
832#else
833 if (x & 0xaaaaaaaa) r += 1;
834 if (x & 0xcccccccc) r += 2;
835 if (x & 0xf0f0f0f0) r += 4;
836 if (x & 0xff00ff00) r += 8;
837 if (x & 0xffff0000) r += 16;
838#endif
839
840 return r;
841 }
842
843 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
844 ecb_function_ int
845 ecb_ctz64 (uint64_t x)
846 {
847 int shift = x & 0xffffffffU ? 0 : 32;
848 return ecb_ctz32 (x >> shift) + shift;
849 }
850
851 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
852 ecb_function_ int
853 ecb_popcount32 (uint32_t x)
854 {
855 x -= (x >> 1) & 0x55555555;
856 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
857 x = ((x >> 4) + x) & 0x0f0f0f0f;
858 x *= 0x01010101;
859
860 return x >> 24;
861 }
862
863 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
864 ecb_function_ int ecb_ld32 (uint32_t x)
865 {
866 int r = 0;
867
868 if (x >> 16) { x >>= 16; r += 16; }
869 if (x >> 8) { x >>= 8; r += 8; }
870 if (x >> 4) { x >>= 4; r += 4; }
871 if (x >> 2) { x >>= 2; r += 2; }
872 if (x >> 1) { r += 1; }
873
874 return r;
875 }
876
877 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
878 ecb_function_ int ecb_ld64 (uint64_t x)
879 {
880 int r = 0;
881
882 if (x >> 32) { x >>= 32; r += 32; }
883
884 return r + ecb_ld32 (x);
885 }
886#endif
887
888ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
889ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
890ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
891ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
892
893ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
894ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
895{
896 return ( (x * 0x0802U & 0x22110U)
897 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
898}
899
900ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
901ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
902{
903 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
904 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
905 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
906 x = ( x >> 8 ) | ( x << 8);
907
908 return x;
909}
910
911ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
912ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
913{
914 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
915 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
916 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
917 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
918 x = ( x >> 16 ) | ( x << 16);
919
920 return x;
921}
922
923/* popcount64 is only available on 64 bit cpus as gcc builtin */
924/* so for this version we are lazy */
925ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
926ecb_function_ int
927ecb_popcount64 (uint64_t x)
928{
929 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
930}
931
932ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
933ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
934ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
935ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
936ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
937ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
938ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
939ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
940
941ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
942ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
943ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
944ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
945ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
946ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
947ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
948ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
949
950#if ECB_GCC_VERSION(4,3)
951 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
952 #define ecb_bswap32(x) __builtin_bswap32 (x)
953 #define ecb_bswap64(x) __builtin_bswap64 (x)
954#else
955 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
956 ecb_function_ uint16_t
957 ecb_bswap16 (uint16_t x)
958 {
959 return ecb_rotl16 (x, 8);
960 }
961
962 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
963 ecb_function_ uint32_t
964 ecb_bswap32 (uint32_t x)
965 {
966 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
967 }
968
969 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
970 ecb_function_ uint64_t
971 ecb_bswap64 (uint64_t x)
972 {
973 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
974 }
975#endif
976
977#if ECB_GCC_VERSION(4,5)
978 #define ecb_unreachable() __builtin_unreachable ()
979#else
980 /* this seems to work fine, but gcc always emits a warning for it :/ */
981 ecb_inline void ecb_unreachable (void) ecb_noreturn;
982 ecb_inline void ecb_unreachable (void) { }
983#endif
984
985/* try to tell the compiler that some condition is definitely true */
986#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
987
988ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
989ecb_inline unsigned char
990ecb_byteorder_helper (void)
991{
992 /* the union code still generates code under pressure in gcc, */
993 /* but less than using pointers, and always seems to */
994 /* successfully return a constant. */
995 /* the reason why we have this horrible preprocessor mess */
996 /* is to avoid it in all cases, at least on common architectures */
997 /* or when using a recent enough gcc version (>= 4.6) */
998#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
999 return 0x44;
1000#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1001 return 0x44;
1002#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1003 return 0x11;
1004#else
1005 union
1006 {
1007 uint32_t i;
1008 uint8_t c;
1009 } u = { 0x11223344 };
1010 return u.c;
1011#endif
1012}
1013
1014ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1015ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1016ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1017ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1018
1019#if ECB_GCC_VERSION(3,0) || ECB_C99
1020 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1021#else
1022 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1023#endif
1024
1025#if __cplusplus
1026 template<typename T>
1027 static inline T ecb_div_rd (T val, T div)
1028 {
1029 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1030 }
1031 template<typename T>
1032 static inline T ecb_div_ru (T val, T div)
1033 {
1034 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1035 }
1036#else
1037 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1038 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1039#endif
1040
1041#if ecb_cplusplus_does_not_suck
1042 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1043 template<typename T, int N>
1044 static inline int ecb_array_length (const T (&arr)[N])
1045 {
1046 return N;
1047 }
1048#else
1049 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1050#endif
1051
1052/*******************************************************************************/
1053/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1054
1055/* basically, everything uses "ieee pure-endian" floating point numbers */
1056/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1057#if 0 \
1058 || __i386 || __i386__ \
1059 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1060 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1061 || defined __arm__ && defined __ARM_EABI__ \
1062 || defined __s390__ || defined __s390x__ \
1063 || defined __mips__ \
1064 || defined __alpha__ \
1065 || defined __hppa__ \
1066 || defined __ia64__ \
1067 || defined __m68k__ \
1068 || defined __m88k__ \
1069 || defined __sh__ \
1070 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1071 #define ECB_STDFP 1
1072 #include <string.h> /* for memcpy */
1073#else
1074 #define ECB_STDFP 0
1075#endif
1076
1077#ifndef ECB_NO_LIBM
1078
1079 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1080
1081 /* only the oldest of old doesn't have this one. solaris. */
1082 #ifdef INFINITY
1083 #define ECB_INFINITY INFINITY
1084 #else
1085 #define ECB_INFINITY HUGE_VAL
1086 #endif
1087
1088 #ifdef NAN
1089 #define ECB_NAN NAN
1090 #else
1091 #define ECB_NAN ECB_INFINITY
1092 #endif
1093
1094 /* converts an ieee half/binary16 to a float */
1095 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1096 ecb_function_ float
1097 ecb_binary16_to_float (uint16_t x)
1098 {
1099 int e = (x >> 10) & 0x1f;
1100 int m = x & 0x3ff;
1101 float r;
1102
1103 if (!e ) r = ldexpf (m , -24);
1104 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1105 else if (m ) r = ECB_NAN;
1106 else r = ECB_INFINITY;
1107
1108 return x & 0x8000 ? -r : r;
1109 }
1110
1111 /* convert a float to ieee single/binary32 */
1112 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1113 ecb_function_ uint32_t
1114 ecb_float_to_binary32 (float x)
1115 {
1116 uint32_t r;
1117
1118 #if ECB_STDFP
1119 memcpy (&r, &x, 4);
1120 #else
1121 /* slow emulation, works for anything but -0 */
1122 uint32_t m;
1123 int e;
1124
1125 if (x == 0e0f ) return 0x00000000U;
1126 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1127 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1128 if (x != x ) return 0x7fbfffffU;
1129
1130 m = frexpf (x, &e) * 0x1000000U;
1131
1132 r = m & 0x80000000U;
1133
1134 if (r)
1135 m = -m;
1136
1137 if (e <= -126)
1138 {
1139 m &= 0xffffffU;
1140 m >>= (-125 - e);
1141 e = -126;
1142 }
1143
1144 r |= (e + 126) << 23;
1145 r |= m & 0x7fffffU;
1146 #endif
1147
1148 return r;
1149 }
1150
1151 /* converts an ieee single/binary32 to a float */
1152 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1153 ecb_function_ float
1154 ecb_binary32_to_float (uint32_t x)
1155 {
1156 float r;
1157
1158 #if ECB_STDFP
1159 memcpy (&r, &x, 4);
1160 #else
1161 /* emulation, only works for normals and subnormals and +0 */
1162 int neg = x >> 31;
1163 int e = (x >> 23) & 0xffU;
1164
1165 x &= 0x7fffffU;
1166
1167 if (e)
1168 x |= 0x800000U;
1169 else
1170 e = 1;
1171
1172 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1173 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1174
1175 r = neg ? -r : r;
1176 #endif
1177
1178 return r;
1179 }
1180
1181 /* convert a double to ieee double/binary64 */
1182 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1183 ecb_function_ uint64_t
1184 ecb_double_to_binary64 (double x)
1185 {
1186 uint64_t r;
1187
1188 #if ECB_STDFP
1189 memcpy (&r, &x, 8);
1190 #else
1191 /* slow emulation, works for anything but -0 */
1192 uint64_t m;
1193 int e;
1194
1195 if (x == 0e0 ) return 0x0000000000000000U;
1196 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1197 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1198 if (x != x ) return 0X7ff7ffffffffffffU;
1199
1200 m = frexp (x, &e) * 0x20000000000000U;
1201
1202 r = m & 0x8000000000000000;;
1203
1204 if (r)
1205 m = -m;
1206
1207 if (e <= -1022)
1208 {
1209 m &= 0x1fffffffffffffU;
1210 m >>= (-1021 - e);
1211 e = -1022;
1212 }
1213
1214 r |= ((uint64_t)(e + 1022)) << 52;
1215 r |= m & 0xfffffffffffffU;
1216 #endif
1217
1218 return r;
1219 }
1220
1221 /* converts an ieee double/binary64 to a double */
1222 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1223 ecb_function_ double
1224 ecb_binary64_to_double (uint64_t x)
1225 {
1226 double r;
1227
1228 #if ECB_STDFP
1229 memcpy (&r, &x, 8);
1230 #else
1231 /* emulation, only works for normals and subnormals and +0 */
1232 int neg = x >> 63;
1233 int e = (x >> 52) & 0x7ffU;
1234
1235 x &= 0xfffffffffffffU;
1236
1237 if (e)
1238 x |= 0x10000000000000U;
1239 else
1240 e = 1;
1241
1242 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1243 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1244
1245 r = neg ? -r : r;
1246 #endif
1247
1248 return r;
1249 }
1250
1251#endif
1252
1253#endif
1254
1255/* ECB.H END */
1256
1257#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1258/* if your architecture doesn't need memory fences, e.g. because it is
1259 * single-cpu/core, or if you use libev in a project that doesn't use libev
1260 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1261 * libev, in which cases the memory fences become nops.
1262 * alternatively, you can remove this #error and link against libpthread,
1263 * which will then provide the memory fences.
1264 */
1265# error "memory fences not defined for your architecture, please report"
1266#endif
1267
1268#ifndef ECB_MEMORY_FENCE
1269# define ECB_MEMORY_FENCE do { } while (0)
1270# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1271# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1272#endif
1273
1274#define expect_false(cond) ecb_expect_false (cond)
1275#define expect_true(cond) ecb_expect_true (cond)
1276#define noinline ecb_noinline
1277
476#define inline_size static inline 1278#define inline_size ecb_inline
477 1279
478#if EV_FEATURE_CODE 1280#if EV_FEATURE_CODE
479# define inline_speed static inline 1281# define inline_speed ecb_inline
480#else 1282#else
481# define inline_speed static noinline 1283# define inline_speed static noinline
482#endif 1284#endif
483 1285
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1286#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
523# include "ev_win32.c" 1325# include "ev_win32.c"
524#endif 1326#endif
525 1327
526/*****************************************************************************/ 1328/*****************************************************************************/
527 1329
1330/* define a suitable floor function (only used by periodics atm) */
1331
1332#if EV_USE_FLOOR
1333# include <math.h>
1334# define ev_floor(v) floor (v)
1335#else
1336
1337#include <float.h>
1338
1339/* a floor() replacement function, should be independent of ev_tstamp type */
1340static ev_tstamp noinline
1341ev_floor (ev_tstamp v)
1342{
1343 /* the choice of shift factor is not terribly important */
1344#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1345 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1346#else
1347 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1348#endif
1349
1350 /* argument too large for an unsigned long? */
1351 if (expect_false (v >= shift))
1352 {
1353 ev_tstamp f;
1354
1355 if (v == v - 1.)
1356 return v; /* very large number */
1357
1358 f = shift * ev_floor (v * (1. / shift));
1359 return f + ev_floor (v - f);
1360 }
1361
1362 /* special treatment for negative args? */
1363 if (expect_false (v < 0.))
1364 {
1365 ev_tstamp f = -ev_floor (-v);
1366
1367 return f - (f == v ? 0 : 1);
1368 }
1369
1370 /* fits into an unsigned long */
1371 return (unsigned long)v;
1372}
1373
1374#endif
1375
1376/*****************************************************************************/
1377
528#ifdef __linux 1378#ifdef __linux
529# include <sys/utsname.h> 1379# include <sys/utsname.h>
530#endif 1380#endif
531 1381
532static unsigned int noinline 1382static unsigned int noinline ecb_cold
533ev_linux_version (void) 1383ev_linux_version (void)
534{ 1384{
535#ifdef __linux 1385#ifdef __linux
536 unsigned int v = 0; 1386 unsigned int v = 0;
537 struct utsname buf; 1387 struct utsname buf;
… …
566} 1416}
567 1417
568/*****************************************************************************/ 1418/*****************************************************************************/
569 1419
570#if EV_AVOID_STDIO 1420#if EV_AVOID_STDIO
571static void noinline 1421static void noinline ecb_cold
572ev_printerr (const char *msg) 1422ev_printerr (const char *msg)
573{ 1423{
574 write (STDERR_FILENO, msg, strlen (msg)); 1424 write (STDERR_FILENO, msg, strlen (msg));
575} 1425}
576#endif 1426#endif
577 1427
578static void (*syserr_cb)(const char *msg); 1428static void (*syserr_cb)(const char *msg) EV_THROW;
579 1429
580void 1430void ecb_cold
581ev_set_syserr_cb (void (*cb)(const char *msg)) 1431ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
582{ 1432{
583 syserr_cb = cb; 1433 syserr_cb = cb;
584} 1434}
585 1435
586static void noinline 1436static void noinline ecb_cold
587ev_syserr (const char *msg) 1437ev_syserr (const char *msg)
588{ 1438{
589 if (!msg) 1439 if (!msg)
590 msg = "(libev) system error"; 1440 msg = "(libev) system error";
591 1441
… …
604 abort (); 1454 abort ();
605 } 1455 }
606} 1456}
607 1457
608static void * 1458static void *
609ev_realloc_emul (void *ptr, long size) 1459ev_realloc_emul (void *ptr, long size) EV_THROW
610{ 1460{
611#if __GLIBC__
612 return realloc (ptr, size);
613#else
614 /* some systems, notably openbsd and darwin, fail to properly 1461 /* some systems, notably openbsd and darwin, fail to properly
615 * implement realloc (x, 0) (as required by both ansi c-89 and 1462 * implement realloc (x, 0) (as required by both ansi c-89 and
616 * the single unix specification, so work around them here. 1463 * the single unix specification, so work around them here.
1464 * recently, also (at least) fedora and debian started breaking it,
1465 * despite documenting it otherwise.
617 */ 1466 */
618 1467
619 if (size) 1468 if (size)
620 return realloc (ptr, size); 1469 return realloc (ptr, size);
621 1470
622 free (ptr); 1471 free (ptr);
623 return 0; 1472 return 0;
624#endif
625} 1473}
626 1474
627static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1475static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
628 1476
629void 1477void ecb_cold
630ev_set_allocator (void *(*cb)(void *ptr, long size)) 1478ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
631{ 1479{
632 alloc = cb; 1480 alloc = cb;
633} 1481}
634 1482
635inline_speed void * 1483inline_speed void *
… …
723 #undef VAR 1571 #undef VAR
724 }; 1572 };
725 #include "ev_wrap.h" 1573 #include "ev_wrap.h"
726 1574
727 static struct ev_loop default_loop_struct; 1575 static struct ev_loop default_loop_struct;
728 struct ev_loop *ev_default_loop_ptr; 1576 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
729 1577
730#else 1578#else
731 1579
732 ev_tstamp ev_rt_now; 1580 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; 1581 #define VAR(name,decl) static decl;
734 #include "ev_vars.h" 1582 #include "ev_vars.h"
735 #undef VAR 1583 #undef VAR
736 1584
737 static int ev_default_loop_ptr; 1585 static int ev_default_loop_ptr;
… …
752 1600
753/*****************************************************************************/ 1601/*****************************************************************************/
754 1602
755#ifndef EV_HAVE_EV_TIME 1603#ifndef EV_HAVE_EV_TIME
756ev_tstamp 1604ev_tstamp
757ev_time (void) 1605ev_time (void) EV_THROW
758{ 1606{
759#if EV_USE_REALTIME 1607#if EV_USE_REALTIME
760 if (expect_true (have_realtime)) 1608 if (expect_true (have_realtime))
761 { 1609 {
762 struct timespec ts; 1610 struct timespec ts;
… …
786 return ev_time (); 1634 return ev_time ();
787} 1635}
788 1636
789#if EV_MULTIPLICITY 1637#if EV_MULTIPLICITY
790ev_tstamp 1638ev_tstamp
791ev_now (EV_P) 1639ev_now (EV_P) EV_THROW
792{ 1640{
793 return ev_rt_now; 1641 return ev_rt_now;
794} 1642}
795#endif 1643#endif
796 1644
797void 1645void
798ev_sleep (ev_tstamp delay) 1646ev_sleep (ev_tstamp delay) EV_THROW
799{ 1647{
800 if (delay > 0.) 1648 if (delay > 0.)
801 { 1649 {
802#if EV_USE_NANOSLEEP 1650#if EV_USE_NANOSLEEP
803 struct timespec ts; 1651 struct timespec ts;
804 1652
805 EV_TS_SET (ts, delay); 1653 EV_TS_SET (ts, delay);
806 nanosleep (&ts, 0); 1654 nanosleep (&ts, 0);
807#elif defined(_WIN32) 1655#elif defined _WIN32
808 Sleep ((unsigned long)(delay * 1e3)); 1656 Sleep ((unsigned long)(delay * 1e3));
809#else 1657#else
810 struct timeval tv; 1658 struct timeval tv;
811 1659
812 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1660 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
816 select (0, 0, 0, 0, &tv); 1664 select (0, 0, 0, 0, &tv);
817#endif 1665#endif
818 } 1666 }
819} 1667}
820 1668
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/*****************************************************************************/ 1669/*****************************************************************************/
830 1670
831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1671#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
832 1672
833/* find a suitable new size for the given array, */ 1673/* find a suitable new size for the given array, */
… …
839 1679
840 do 1680 do
841 ncur <<= 1; 1681 ncur <<= 1;
842 while (cnt > ncur); 1682 while (cnt > ncur);
843 1683
844 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1684 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1685 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
846 { 1686 {
847 ncur *= elem; 1687 ncur *= elem;
848 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1688 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
849 ncur = ncur - sizeof (void *) * 4; 1689 ncur = ncur - sizeof (void *) * 4;
… …
851 } 1691 }
852 1692
853 return ncur; 1693 return ncur;
854} 1694}
855 1695
856static noinline void * 1696static void * noinline ecb_cold
857array_realloc (int elem, void *base, int *cur, int cnt) 1697array_realloc (int elem, void *base, int *cur, int cnt)
858{ 1698{
859 *cur = array_nextsize (elem, *cur, cnt); 1699 *cur = array_nextsize (elem, *cur, cnt);
860 return ev_realloc (base, elem * *cur); 1700 return ev_realloc (base, elem * *cur);
861} 1701}
… …
864 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1704 memset ((void *)(base), 0, sizeof (*(base)) * (count))
865 1705
866#define array_needsize(type,base,cur,cnt,init) \ 1706#define array_needsize(type,base,cur,cnt,init) \
867 if (expect_false ((cnt) > (cur))) \ 1707 if (expect_false ((cnt) > (cur))) \
868 { \ 1708 { \
869 int ocur_ = (cur); \ 1709 int ecb_unused ocur_ = (cur); \
870 (base) = (type *)array_realloc \ 1710 (base) = (type *)array_realloc \
871 (sizeof (type), (base), &(cur), (cnt)); \ 1711 (sizeof (type), (base), &(cur), (cnt)); \
872 init ((base) + (ocur_), (cur) - ocur_); \ 1712 init ((base) + (ocur_), (cur) - ocur_); \
873 } 1713 }
874 1714
… …
892pendingcb (EV_P_ ev_prepare *w, int revents) 1732pendingcb (EV_P_ ev_prepare *w, int revents)
893{ 1733{
894} 1734}
895 1735
896void noinline 1736void noinline
897ev_feed_event (EV_P_ void *w, int revents) 1737ev_feed_event (EV_P_ void *w, int revents) EV_THROW
898{ 1738{
899 W w_ = (W)w; 1739 W w_ = (W)w;
900 int pri = ABSPRI (w_); 1740 int pri = ABSPRI (w_);
901 1741
902 if (expect_false (w_->pending)) 1742 if (expect_false (w_->pending))
… …
906 w_->pending = ++pendingcnt [pri]; 1746 w_->pending = ++pendingcnt [pri];
907 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1747 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
908 pendings [pri][w_->pending - 1].w = w_; 1748 pendings [pri][w_->pending - 1].w = w_;
909 pendings [pri][w_->pending - 1].events = revents; 1749 pendings [pri][w_->pending - 1].events = revents;
910 } 1750 }
1751
1752 pendingpri = NUMPRI - 1;
911} 1753}
912 1754
913inline_speed void 1755inline_speed void
914feed_reverse (EV_P_ W w) 1756feed_reverse (EV_P_ W w)
915{ 1757{
… …
961 if (expect_true (!anfd->reify)) 1803 if (expect_true (!anfd->reify))
962 fd_event_nocheck (EV_A_ fd, revents); 1804 fd_event_nocheck (EV_A_ fd, revents);
963} 1805}
964 1806
965void 1807void
966ev_feed_fd_event (EV_P_ int fd, int revents) 1808ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
967{ 1809{
968 if (fd >= 0 && fd < anfdmax) 1810 if (fd >= 0 && fd < anfdmax)
969 fd_event_nocheck (EV_A_ fd, revents); 1811 fd_event_nocheck (EV_A_ fd, revents);
970} 1812}
971 1813
… …
974inline_size void 1816inline_size void
975fd_reify (EV_P) 1817fd_reify (EV_P)
976{ 1818{
977 int i; 1819 int i;
978 1820
1821#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1822 for (i = 0; i < fdchangecnt; ++i)
1823 {
1824 int fd = fdchanges [i];
1825 ANFD *anfd = anfds + fd;
1826
1827 if (anfd->reify & EV__IOFDSET && anfd->head)
1828 {
1829 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1830
1831 if (handle != anfd->handle)
1832 {
1833 unsigned long arg;
1834
1835 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1836
1837 /* handle changed, but fd didn't - we need to do it in two steps */
1838 backend_modify (EV_A_ fd, anfd->events, 0);
1839 anfd->events = 0;
1840 anfd->handle = handle;
1841 }
1842 }
1843 }
1844#endif
1845
979 for (i = 0; i < fdchangecnt; ++i) 1846 for (i = 0; i < fdchangecnt; ++i)
980 { 1847 {
981 int fd = fdchanges [i]; 1848 int fd = fdchanges [i];
982 ANFD *anfd = anfds + fd; 1849 ANFD *anfd = anfds + fd;
983 ev_io *w; 1850 ev_io *w;
… …
985 unsigned char o_events = anfd->events; 1852 unsigned char o_events = anfd->events;
986 unsigned char o_reify = anfd->reify; 1853 unsigned char o_reify = anfd->reify;
987 1854
988 anfd->reify = 0; 1855 anfd->reify = 0;
989 1856
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 */ 1857 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1001 { 1858 {
1002 anfd->events = 0; 1859 anfd->events = 0;
1003 1860
1004 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1861 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1029 fdchanges [fdchangecnt - 1] = fd; 1886 fdchanges [fdchangecnt - 1] = fd;
1030 } 1887 }
1031} 1888}
1032 1889
1033/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1890/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034inline_speed void 1891inline_speed void ecb_cold
1035fd_kill (EV_P_ int fd) 1892fd_kill (EV_P_ int fd)
1036{ 1893{
1037 ev_io *w; 1894 ev_io *w;
1038 1895
1039 while ((w = (ev_io *)anfds [fd].head)) 1896 while ((w = (ev_io *)anfds [fd].head))
… …
1042 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1899 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1043 } 1900 }
1044} 1901}
1045 1902
1046/* check whether the given fd is actually valid, for error recovery */ 1903/* check whether the given fd is actually valid, for error recovery */
1047inline_size int 1904inline_size int ecb_cold
1048fd_valid (int fd) 1905fd_valid (int fd)
1049{ 1906{
1050#ifdef _WIN32 1907#ifdef _WIN32
1051 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1908 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052#else 1909#else
1053 return fcntl (fd, F_GETFD) != -1; 1910 return fcntl (fd, F_GETFD) != -1;
1054#endif 1911#endif
1055} 1912}
1056 1913
1057/* called on EBADF to verify fds */ 1914/* called on EBADF to verify fds */
1058static void noinline 1915static void noinline ecb_cold
1059fd_ebadf (EV_P) 1916fd_ebadf (EV_P)
1060{ 1917{
1061 int fd; 1918 int fd;
1062 1919
1063 for (fd = 0; fd < anfdmax; ++fd) 1920 for (fd = 0; fd < anfdmax; ++fd)
… …
1065 if (!fd_valid (fd) && errno == EBADF) 1922 if (!fd_valid (fd) && errno == EBADF)
1066 fd_kill (EV_A_ fd); 1923 fd_kill (EV_A_ fd);
1067} 1924}
1068 1925
1069/* called on ENOMEM in select/poll to kill some fds and retry */ 1926/* called on ENOMEM in select/poll to kill some fds and retry */
1070static void noinline 1927static void noinline ecb_cold
1071fd_enomem (EV_P) 1928fd_enomem (EV_P)
1072{ 1929{
1073 int fd; 1930 int fd;
1074 1931
1075 for (fd = anfdmax; fd--; ) 1932 for (fd = anfdmax; fd--; )
… …
1270 2127
1271/*****************************************************************************/ 2128/*****************************************************************************/
1272 2129
1273#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2130#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1274 2131
1275static void noinline 2132static void noinline ecb_cold
1276evpipe_init (EV_P) 2133evpipe_init (EV_P)
1277{ 2134{
1278 if (!ev_is_active (&pipe_w)) 2135 if (!ev_is_active (&pipe_w))
1279 { 2136 {
2137 int fds [2];
2138
1280# if EV_USE_EVENTFD 2139# if EV_USE_EVENTFD
2140 fds [0] = -1;
1281 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2141 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1282 if (evfd < 0 && errno == EINVAL) 2142 if (fds [1] < 0 && errno == EINVAL)
1283 evfd = eventfd (0, 0); 2143 fds [1] = eventfd (0, 0);
1284 2144
1285 if (evfd >= 0) 2145 if (fds [1] < 0)
2146# endif
1286 { 2147 {
2148 while (pipe (fds))
2149 ev_syserr ("(libev) error creating signal/async pipe");
2150
2151 fd_intern (fds [0]);
2152 }
2153
1287 evpipe [0] = -1; 2154 evpipe [0] = fds [0];
1288 fd_intern (evfd); /* doing it twice doesn't hurt */ 2155
1289 ev_io_set (&pipe_w, evfd, EV_READ); 2156 if (evpipe [1] < 0)
2157 evpipe [1] = fds [1]; /* first call, set write fd */
2158 else
2159 {
2160 /* on subsequent calls, do not change evpipe [1] */
2161 /* so that evpipe_write can always rely on its value. */
2162 /* this branch does not do anything sensible on windows, */
2163 /* so must not be executed on windows */
2164
2165 dup2 (fds [1], evpipe [1]);
2166 close (fds [1]);
2167 }
2168
2169 fd_intern (evpipe [1]);
2170
2171 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2172 ev_io_start (EV_A_ &pipe_w);
2173 ev_unref (EV_A); /* watcher should not keep loop alive */
2174 }
2175}
2176
2177inline_speed void
2178evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2179{
2180 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2181
2182 if (expect_true (*flag))
2183 return;
2184
2185 *flag = 1;
2186 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2187
2188 pipe_write_skipped = 1;
2189
2190 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2191
2192 if (pipe_write_wanted)
2193 {
2194 int old_errno;
2195
2196 pipe_write_skipped = 0;
2197 ECB_MEMORY_FENCE_RELEASE;
2198
2199 old_errno = errno; /* save errno because write will clobber it */
2200
2201#if EV_USE_EVENTFD
2202 if (evpipe [0] < 0)
2203 {
2204 uint64_t counter = 1;
2205 write (evpipe [1], &counter, sizeof (uint64_t));
1290 } 2206 }
1291 else 2207 else
1292# endif 2208#endif
1293 { 2209 {
1294 while (pipe (evpipe)) 2210#ifdef _WIN32
1295 ev_syserr ("(libev) error creating signal/async pipe"); 2211 WSABUF buf;
1296 2212 DWORD sent;
1297 fd_intern (evpipe [0]); 2213 buf.buf = &buf;
1298 fd_intern (evpipe [1]); 2214 buf.len = 1;
1299 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2215 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2216#else
2217 write (evpipe [1], &(evpipe [1]), 1);
2218#endif
1300 } 2219 }
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 2220
1332 errno = old_errno; 2221 errno = old_errno;
1333 } 2222 }
1334} 2223}
1335 2224
… …
1338static void 2227static void
1339pipecb (EV_P_ ev_io *iow, int revents) 2228pipecb (EV_P_ ev_io *iow, int revents)
1340{ 2229{
1341 int i; 2230 int i;
1342 2231
2232 if (revents & EV_READ)
2233 {
1343#if EV_USE_EVENTFD 2234#if EV_USE_EVENTFD
1344 if (evfd >= 0) 2235 if (evpipe [0] < 0)
1345 { 2236 {
1346 uint64_t counter; 2237 uint64_t counter;
1347 read (evfd, &counter, sizeof (uint64_t)); 2238 read (evpipe [1], &counter, sizeof (uint64_t));
1348 } 2239 }
1349 else 2240 else
1350#endif 2241#endif
1351 { 2242 {
1352 char dummy; 2243 char dummy[4];
1353 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2244#ifdef _WIN32
2245 WSABUF buf;
2246 DWORD recvd;
2247 DWORD flags = 0;
2248 buf.buf = dummy;
2249 buf.len = sizeof (dummy);
2250 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2251#else
1354 read (evpipe [0], &dummy, 1); 2252 read (evpipe [0], &dummy, sizeof (dummy));
2253#endif
2254 }
1355 } 2255 }
2256
2257 pipe_write_skipped = 0;
2258
2259 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1356 2260
1357#if EV_SIGNAL_ENABLE 2261#if EV_SIGNAL_ENABLE
1358 if (sig_pending) 2262 if (sig_pending)
1359 { 2263 {
1360 sig_pending = 0; 2264 sig_pending = 0;
2265
2266 ECB_MEMORY_FENCE;
1361 2267
1362 for (i = EV_NSIG - 1; i--; ) 2268 for (i = EV_NSIG - 1; i--; )
1363 if (expect_false (signals [i].pending)) 2269 if (expect_false (signals [i].pending))
1364 ev_feed_signal_event (EV_A_ i + 1); 2270 ev_feed_signal_event (EV_A_ i + 1);
1365 } 2271 }
… …
1367 2273
1368#if EV_ASYNC_ENABLE 2274#if EV_ASYNC_ENABLE
1369 if (async_pending) 2275 if (async_pending)
1370 { 2276 {
1371 async_pending = 0; 2277 async_pending = 0;
2278
2279 ECB_MEMORY_FENCE;
1372 2280
1373 for (i = asynccnt; i--; ) 2281 for (i = asynccnt; i--; )
1374 if (asyncs [i]->sent) 2282 if (asyncs [i]->sent)
1375 { 2283 {
1376 asyncs [i]->sent = 0; 2284 asyncs [i]->sent = 0;
2285 ECB_MEMORY_FENCE_RELEASE;
1377 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2286 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1378 } 2287 }
1379 } 2288 }
1380#endif 2289#endif
1381} 2290}
1382 2291
1383/*****************************************************************************/ 2292/*****************************************************************************/
1384 2293
1385void 2294void
1386ev_feed_signal (int signum) 2295ev_feed_signal (int signum) EV_THROW
1387{ 2296{
1388#if EV_MULTIPLICITY 2297#if EV_MULTIPLICITY
2298 EV_P;
2299 ECB_MEMORY_FENCE_ACQUIRE;
1389 EV_P = signals [signum - 1].loop; 2300 EV_A = signals [signum - 1].loop;
1390 2301
1391 if (!EV_A) 2302 if (!EV_A)
1392 return; 2303 return;
1393#endif 2304#endif
1394 2305
… …
1405 2316
1406 ev_feed_signal (signum); 2317 ev_feed_signal (signum);
1407} 2318}
1408 2319
1409void noinline 2320void noinline
1410ev_feed_signal_event (EV_P_ int signum) 2321ev_feed_signal_event (EV_P_ int signum) EV_THROW
1411{ 2322{
1412 WL w; 2323 WL w;
1413 2324
1414 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2325 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1415 return; 2326 return;
1416 2327
1417 --signum; 2328 --signum;
1418 2329
1419#if EV_MULTIPLICITY 2330#if EV_MULTIPLICITY
… …
1423 if (expect_false (signals [signum].loop != EV_A)) 2334 if (expect_false (signals [signum].loop != EV_A))
1424 return; 2335 return;
1425#endif 2336#endif
1426 2337
1427 signals [signum].pending = 0; 2338 signals [signum].pending = 0;
2339 ECB_MEMORY_FENCE_RELEASE;
1428 2340
1429 for (w = signals [signum].head; w; w = w->next) 2341 for (w = signals [signum].head; w; w = w->next)
1430 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2342 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1431} 2343}
1432 2344
… …
1530#endif 2442#endif
1531#if EV_USE_SELECT 2443#if EV_USE_SELECT
1532# include "ev_select.c" 2444# include "ev_select.c"
1533#endif 2445#endif
1534 2446
1535int 2447int ecb_cold
1536ev_version_major (void) 2448ev_version_major (void) EV_THROW
1537{ 2449{
1538 return EV_VERSION_MAJOR; 2450 return EV_VERSION_MAJOR;
1539} 2451}
1540 2452
1541int 2453int ecb_cold
1542ev_version_minor (void) 2454ev_version_minor (void) EV_THROW
1543{ 2455{
1544 return EV_VERSION_MINOR; 2456 return EV_VERSION_MINOR;
1545} 2457}
1546 2458
1547/* return true if we are running with elevated privileges and should ignore env variables */ 2459/* return true if we are running with elevated privileges and should ignore env variables */
1548int inline_size 2460int inline_size ecb_cold
1549enable_secure (void) 2461enable_secure (void)
1550{ 2462{
1551#ifdef _WIN32 2463#ifdef _WIN32
1552 return 0; 2464 return 0;
1553#else 2465#else
1554 return getuid () != geteuid () 2466 return getuid () != geteuid ()
1555 || getgid () != getegid (); 2467 || getgid () != getegid ();
1556#endif 2468#endif
1557} 2469}
1558 2470
1559unsigned int 2471unsigned int ecb_cold
1560ev_supported_backends (void) 2472ev_supported_backends (void) EV_THROW
1561{ 2473{
1562 unsigned int flags = 0; 2474 unsigned int flags = 0;
1563 2475
1564 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2476 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1565 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2477 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1568 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2480 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1569 2481
1570 return flags; 2482 return flags;
1571} 2483}
1572 2484
1573unsigned int 2485unsigned int ecb_cold
1574ev_recommended_backends (void) 2486ev_recommended_backends (void) EV_THROW
1575{ 2487{
1576 unsigned int flags = ev_supported_backends (); 2488 unsigned int flags = ev_supported_backends ();
1577 2489
1578#ifndef __NetBSD__ 2490#ifndef __NetBSD__
1579 /* kqueue is borked on everything but netbsd apparently */ 2491 /* kqueue is borked on everything but netbsd apparently */
… …
1590#endif 2502#endif
1591 2503
1592 return flags; 2504 return flags;
1593} 2505}
1594 2506
1595unsigned int 2507unsigned int ecb_cold
1596ev_embeddable_backends (void) 2508ev_embeddable_backends (void) EV_THROW
1597{ 2509{
1598 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2510 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1599 2511
1600 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2512 /* 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 */ 2513 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1603 2515
1604 return flags; 2516 return flags;
1605} 2517}
1606 2518
1607unsigned int 2519unsigned int
1608ev_backend (EV_P) 2520ev_backend (EV_P) EV_THROW
1609{ 2521{
1610 return backend; 2522 return backend;
1611} 2523}
1612 2524
1613#if EV_FEATURE_API 2525#if EV_FEATURE_API
1614unsigned int 2526unsigned int
1615ev_iteration (EV_P) 2527ev_iteration (EV_P) EV_THROW
1616{ 2528{
1617 return loop_count; 2529 return loop_count;
1618} 2530}
1619 2531
1620unsigned int 2532unsigned int
1621ev_depth (EV_P) 2533ev_depth (EV_P) EV_THROW
1622{ 2534{
1623 return loop_depth; 2535 return loop_depth;
1624} 2536}
1625 2537
1626void 2538void
1627ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2539ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1628{ 2540{
1629 io_blocktime = interval; 2541 io_blocktime = interval;
1630} 2542}
1631 2543
1632void 2544void
1633ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2545ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1634{ 2546{
1635 timeout_blocktime = interval; 2547 timeout_blocktime = interval;
1636} 2548}
1637 2549
1638void 2550void
1639ev_set_userdata (EV_P_ void *data) 2551ev_set_userdata (EV_P_ void *data) EV_THROW
1640{ 2552{
1641 userdata = data; 2553 userdata = data;
1642} 2554}
1643 2555
1644void * 2556void *
1645ev_userdata (EV_P) 2557ev_userdata (EV_P) EV_THROW
1646{ 2558{
1647 return userdata; 2559 return userdata;
1648} 2560}
1649 2561
2562void
1650void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2563ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
1651{ 2564{
1652 invoke_cb = invoke_pending_cb; 2565 invoke_cb = invoke_pending_cb;
1653} 2566}
1654 2567
1655void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2568void
2569ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
1656{ 2570{
1657 release_cb = release; 2571 release_cb = release;
1658 acquire_cb = acquire; 2572 acquire_cb = acquire;
1659} 2573}
1660#endif 2574#endif
1661 2575
1662/* initialise a loop structure, must be zero-initialised */ 2576/* initialise a loop structure, must be zero-initialised */
1663static void noinline 2577static void noinline ecb_cold
1664loop_init (EV_P_ unsigned int flags) 2578loop_init (EV_P_ unsigned int flags) EV_THROW
1665{ 2579{
1666 if (!backend) 2580 if (!backend)
1667 { 2581 {
1668 origflags = flags; 2582 origflags = flags;
1669 2583
… …
1696 if (!(flags & EVFLAG_NOENV) 2610 if (!(flags & EVFLAG_NOENV)
1697 && !enable_secure () 2611 && !enable_secure ()
1698 && getenv ("LIBEV_FLAGS")) 2612 && getenv ("LIBEV_FLAGS"))
1699 flags = atoi (getenv ("LIBEV_FLAGS")); 2613 flags = atoi (getenv ("LIBEV_FLAGS"));
1700 2614
1701 ev_rt_now = ev_time (); 2615 ev_rt_now = ev_time ();
1702 mn_now = get_clock (); 2616 mn_now = get_clock ();
1703 now_floor = mn_now; 2617 now_floor = mn_now;
1704 rtmn_diff = ev_rt_now - mn_now; 2618 rtmn_diff = ev_rt_now - mn_now;
1705#if EV_FEATURE_API 2619#if EV_FEATURE_API
1706 invoke_cb = ev_invoke_pending; 2620 invoke_cb = ev_invoke_pending;
1707#endif 2621#endif
1708 2622
1709 io_blocktime = 0.; 2623 io_blocktime = 0.;
1710 timeout_blocktime = 0.; 2624 timeout_blocktime = 0.;
1711 backend = 0; 2625 backend = 0;
1712 backend_fd = -1; 2626 backend_fd = -1;
1713 sig_pending = 0; 2627 sig_pending = 0;
1714#if EV_ASYNC_ENABLE 2628#if EV_ASYNC_ENABLE
1715 async_pending = 0; 2629 async_pending = 0;
1716#endif 2630#endif
2631 pipe_write_skipped = 0;
2632 pipe_write_wanted = 0;
2633 evpipe [0] = -1;
2634 evpipe [1] = -1;
1717#if EV_USE_INOTIFY 2635#if EV_USE_INOTIFY
1718 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2636 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719#endif 2637#endif
1720#if EV_USE_SIGNALFD 2638#if EV_USE_SIGNALFD
1721 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2639 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722#endif 2640#endif
1723 2641
1724 if (!(flags & EVBACKEND_MASK)) 2642 if (!(flags & EVBACKEND_MASK))
1725 flags |= ev_recommended_backends (); 2643 flags |= ev_recommended_backends ();
1726 2644
… …
1751#endif 2669#endif
1752 } 2670 }
1753} 2671}
1754 2672
1755/* free up a loop structure */ 2673/* free up a loop structure */
1756void 2674void ecb_cold
1757ev_loop_destroy (EV_P) 2675ev_loop_destroy (EV_P)
1758{ 2676{
1759 int i; 2677 int i;
1760 2678
1761#if EV_MULTIPLICITY 2679#if EV_MULTIPLICITY
… …
1772 EV_INVOKE_PENDING; 2690 EV_INVOKE_PENDING;
1773 } 2691 }
1774#endif 2692#endif
1775 2693
1776#if EV_CHILD_ENABLE 2694#if EV_CHILD_ENABLE
1777 if (ev_is_active (&childev)) 2695 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1778 { 2696 {
1779 ev_ref (EV_A); /* child watcher */ 2697 ev_ref (EV_A); /* child watcher */
1780 ev_signal_stop (EV_A_ &childev); 2698 ev_signal_stop (EV_A_ &childev);
1781 } 2699 }
1782#endif 2700#endif
… …
1784 if (ev_is_active (&pipe_w)) 2702 if (ev_is_active (&pipe_w))
1785 { 2703 {
1786 /*ev_ref (EV_A);*/ 2704 /*ev_ref (EV_A);*/
1787 /*ev_io_stop (EV_A_ &pipe_w);*/ 2705 /*ev_io_stop (EV_A_ &pipe_w);*/
1788 2706
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]); 2707 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1797 EV_WIN32_CLOSE_FD (evpipe [1]); 2708 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1798 }
1799 } 2709 }
1800 2710
1801#if EV_USE_SIGNALFD 2711#if EV_USE_SIGNALFD
1802 if (ev_is_active (&sigfd_w)) 2712 if (ev_is_active (&sigfd_w))
1803 close (sigfd); 2713 close (sigfd);
… …
1889#endif 2799#endif
1890#if EV_USE_INOTIFY 2800#if EV_USE_INOTIFY
1891 infy_fork (EV_A); 2801 infy_fork (EV_A);
1892#endif 2802#endif
1893 2803
2804#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1894 if (ev_is_active (&pipe_w)) 2805 if (ev_is_active (&pipe_w))
1895 { 2806 {
1896 /* this "locks" the handlers against writing to the pipe */ 2807 /* 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 2808
1903 ev_ref (EV_A); 2809 ev_ref (EV_A);
1904 ev_io_stop (EV_A_ &pipe_w); 2810 ev_io_stop (EV_A_ &pipe_w);
1905 2811
1906#if EV_USE_EVENTFD
1907 if (evfd >= 0)
1908 close (evfd);
1909#endif
1910
1911 if (evpipe [0] >= 0) 2812 if (evpipe [0] >= 0)
1912 {
1913 EV_WIN32_CLOSE_FD (evpipe [0]); 2813 EV_WIN32_CLOSE_FD (evpipe [0]);
1914 EV_WIN32_CLOSE_FD (evpipe [1]);
1915 }
1916 2814
1917#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1918 evpipe_init (EV_A); 2815 evpipe_init (EV_A);
1919 /* now iterate over everything, in case we missed something */ 2816 /* iterate over everything, in case we missed something before */
1920 pipecb (EV_A_ &pipe_w, EV_READ); 2817 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1921#endif
1922 } 2818 }
2819#endif
1923 2820
1924 postfork = 0; 2821 postfork = 0;
1925} 2822}
1926 2823
1927#if EV_MULTIPLICITY 2824#if EV_MULTIPLICITY
1928 2825
1929struct ev_loop * 2826struct ev_loop * ecb_cold
1930ev_loop_new (unsigned int flags) 2827ev_loop_new (unsigned int flags) EV_THROW
1931{ 2828{
1932 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2829 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933 2830
1934 memset (EV_A, 0, sizeof (struct ev_loop)); 2831 memset (EV_A, 0, sizeof (struct ev_loop));
1935 loop_init (EV_A_ flags); 2832 loop_init (EV_A_ flags);
… …
1942} 2839}
1943 2840
1944#endif /* multiplicity */ 2841#endif /* multiplicity */
1945 2842
1946#if EV_VERIFY 2843#if EV_VERIFY
1947static void noinline 2844static void noinline ecb_cold
1948verify_watcher (EV_P_ W w) 2845verify_watcher (EV_P_ W w)
1949{ 2846{
1950 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2847 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951 2848
1952 if (w->pending) 2849 if (w->pending)
1953 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2850 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954} 2851}
1955 2852
1956static void noinline 2853static void noinline ecb_cold
1957verify_heap (EV_P_ ANHE *heap, int N) 2854verify_heap (EV_P_ ANHE *heap, int N)
1958{ 2855{
1959 int i; 2856 int i;
1960 2857
1961 for (i = HEAP0; i < N + HEAP0; ++i) 2858 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1966 2863
1967 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2864 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968 } 2865 }
1969} 2866}
1970 2867
1971static void noinline 2868static void noinline ecb_cold
1972array_verify (EV_P_ W *ws, int cnt) 2869array_verify (EV_P_ W *ws, int cnt)
1973{ 2870{
1974 while (cnt--) 2871 while (cnt--)
1975 { 2872 {
1976 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2873 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1978 } 2875 }
1979} 2876}
1980#endif 2877#endif
1981 2878
1982#if EV_FEATURE_API 2879#if EV_FEATURE_API
1983void 2880void ecb_cold
1984ev_verify (EV_P) 2881ev_verify (EV_P) EV_THROW
1985{ 2882{
1986#if EV_VERIFY 2883#if EV_VERIFY
1987 int i; 2884 int i;
1988 WL w; 2885 WL w, w2;
1989 2886
1990 assert (activecnt >= -1); 2887 assert (activecnt >= -1);
1991 2888
1992 assert (fdchangemax >= fdchangecnt); 2889 assert (fdchangemax >= fdchangecnt);
1993 for (i = 0; i < fdchangecnt; ++i) 2890 for (i = 0; i < fdchangecnt; ++i)
1994 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2891 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1995 2892
1996 assert (anfdmax >= 0); 2893 assert (anfdmax >= 0);
1997 for (i = 0; i < anfdmax; ++i) 2894 for (i = 0; i < anfdmax; ++i)
2895 {
2896 int j = 0;
2897
1998 for (w = anfds [i].head; w; w = w->next) 2898 for (w = w2 = anfds [i].head; w; w = w->next)
1999 { 2899 {
2000 verify_watcher (EV_A_ (W)w); 2900 verify_watcher (EV_A_ (W)w);
2901
2902 if (j++ & 1)
2903 {
2904 assert (("libev: io watcher list contains a loop", w != w2));
2905 w2 = w2->next;
2906 }
2907
2001 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2908 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)); 2909 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2003 } 2910 }
2911 }
2004 2912
2005 assert (timermax >= timercnt); 2913 assert (timermax >= timercnt);
2006 verify_heap (EV_A_ timers, timercnt); 2914 verify_heap (EV_A_ timers, timercnt);
2007 2915
2008#if EV_PERIODIC_ENABLE 2916#if EV_PERIODIC_ENABLE
… …
2054#endif 2962#endif
2055} 2963}
2056#endif 2964#endif
2057 2965
2058#if EV_MULTIPLICITY 2966#if EV_MULTIPLICITY
2059struct ev_loop * 2967struct ev_loop * ecb_cold
2060#else 2968#else
2061int 2969int
2062#endif 2970#endif
2063ev_default_loop (unsigned int flags) 2971ev_default_loop (unsigned int flags) EV_THROW
2064{ 2972{
2065 if (!ev_default_loop_ptr) 2973 if (!ev_default_loop_ptr)
2066 { 2974 {
2067#if EV_MULTIPLICITY 2975#if EV_MULTIPLICITY
2068 EV_P = ev_default_loop_ptr = &default_loop_struct; 2976 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2087 2995
2088 return ev_default_loop_ptr; 2996 return ev_default_loop_ptr;
2089} 2997}
2090 2998
2091void 2999void
2092ev_loop_fork (EV_P) 3000ev_loop_fork (EV_P) EV_THROW
2093{ 3001{
2094 postfork = 1; /* must be in line with ev_default_fork */ 3002 postfork = 1;
2095} 3003}
2096 3004
2097/*****************************************************************************/ 3005/*****************************************************************************/
2098 3006
2099void 3007void
… …
2101{ 3009{
2102 EV_CB_INVOKE ((W)w, revents); 3010 EV_CB_INVOKE ((W)w, revents);
2103} 3011}
2104 3012
2105unsigned int 3013unsigned int
2106ev_pending_count (EV_P) 3014ev_pending_count (EV_P) EV_THROW
2107{ 3015{
2108 int pri; 3016 int pri;
2109 unsigned int count = 0; 3017 unsigned int count = 0;
2110 3018
2111 for (pri = NUMPRI; pri--; ) 3019 for (pri = NUMPRI; pri--; )
… …
2115} 3023}
2116 3024
2117void noinline 3025void noinline
2118ev_invoke_pending (EV_P) 3026ev_invoke_pending (EV_P)
2119{ 3027{
2120 int pri; 3028 pendingpri = NUMPRI;
2121 3029
2122 for (pri = NUMPRI; pri--; ) 3030 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3031 {
3032 --pendingpri;
3033
2123 while (pendingcnt [pri]) 3034 while (pendingcnt [pendingpri])
2124 { 3035 {
2125 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3036 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2126 3037
2127 p->w->pending = 0; 3038 p->w->pending = 0;
2128 EV_CB_INVOKE (p->w, p->events); 3039 EV_CB_INVOKE (p->w, p->events);
2129 EV_FREQUENT_CHECK; 3040 EV_FREQUENT_CHECK;
2130 } 3041 }
3042 }
2131} 3043}
2132 3044
2133#if EV_IDLE_ENABLE 3045#if EV_IDLE_ENABLE
2134/* make idle watchers pending. this handles the "call-idle */ 3046/* make idle watchers pending. this handles the "call-idle */
2135/* only when higher priorities are idle" logic */ 3047/* only when higher priorities are idle" logic */
… …
2193 } 3105 }
2194} 3106}
2195 3107
2196#if EV_PERIODIC_ENABLE 3108#if EV_PERIODIC_ENABLE
2197 3109
2198inline_speed 3110static void noinline
2199periodic_recalc (EV_P_ ev_periodic *w) 3111periodic_recalc (EV_P_ ev_periodic *w)
2200{ 3112{
2201 /* TODO: use slow but potentially more correct incremental algo, */ 3113 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202 /* also do not rely on ceil */ 3114 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; 3115
3116 /* the above almost always errs on the low side */
3117 while (at <= ev_rt_now)
3118 {
3119 ev_tstamp nat = at + w->interval;
3120
3121 /* when resolution fails us, we use ev_rt_now */
3122 if (expect_false (nat == at))
3123 {
3124 at = ev_rt_now;
3125 break;
3126 }
3127
3128 at = nat;
3129 }
3130
3131 ev_at (w) = at;
2204} 3132}
2205 3133
2206/* make periodics pending */ 3134/* make periodics pending */
2207inline_size void 3135inline_size void
2208periodics_reify (EV_P) 3136periodics_reify (EV_P)
2209{ 3137{
2210 EV_FREQUENT_CHECK; 3138 EV_FREQUENT_CHECK;
2211 3139
2212 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3140 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2213 { 3141 {
2214 int feed_count = 0;
2215
2216 do 3142 do
2217 { 3143 {
2218 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3144 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2219 3145
2220 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3146 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2230 downheap (periodics, periodiccnt, HEAP0); 3156 downheap (periodics, periodiccnt, HEAP0);
2231 } 3157 }
2232 else if (w->interval) 3158 else if (w->interval)
2233 { 3159 {
2234 periodic_recalc (EV_A_ w); 3160 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]); 3161 ANHE_at_cache (periodics [HEAP0]);
2250 downheap (periodics, periodiccnt, HEAP0); 3162 downheap (periodics, periodiccnt, HEAP0);
2251 } 3163 }
2252 else 3164 else
2253 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2261 } 3173 }
2262} 3174}
2263 3175
2264/* simply recalculate all periodics */ 3176/* simply recalculate all periodics */
2265/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3177/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266static void noinline 3178static void noinline ecb_cold
2267periodics_reschedule (EV_P) 3179periodics_reschedule (EV_P)
2268{ 3180{
2269 int i; 3181 int i;
2270 3182
2271 /* adjust periodics after time jump */ 3183 /* adjust periodics after time jump */
… …
2284 reheap (periodics, periodiccnt); 3196 reheap (periodics, periodiccnt);
2285} 3197}
2286#endif 3198#endif
2287 3199
2288/* adjust all timers by a given offset */ 3200/* adjust all timers by a given offset */
2289static void noinline 3201static void noinline ecb_cold
2290timers_reschedule (EV_P_ ev_tstamp adjust) 3202timers_reschedule (EV_P_ ev_tstamp adjust)
2291{ 3203{
2292 int i; 3204 int i;
2293 3205
2294 for (i = 0; i < timercnt; ++i) 3206 for (i = 0; i < timercnt; ++i)
… …
2331 * doesn't hurt either as we only do this on time-jumps or 3243 * doesn't hurt either as we only do this on time-jumps or
2332 * in the unlikely event of having been preempted here. 3244 * in the unlikely event of having been preempted here.
2333 */ 3245 */
2334 for (i = 4; --i; ) 3246 for (i = 4; --i; )
2335 { 3247 {
3248 ev_tstamp diff;
2336 rtmn_diff = ev_rt_now - mn_now; 3249 rtmn_diff = ev_rt_now - mn_now;
2337 3250
3251 diff = odiff - rtmn_diff;
3252
2338 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3253 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2339 return; /* all is well */ 3254 return; /* all is well */
2340 3255
2341 ev_rt_now = ev_time (); 3256 ev_rt_now = ev_time ();
2342 mn_now = get_clock (); 3257 mn_now = get_clock ();
2343 now_floor = mn_now; 3258 now_floor = mn_now;
… …
2365 3280
2366 mn_now = ev_rt_now; 3281 mn_now = ev_rt_now;
2367 } 3282 }
2368} 3283}
2369 3284
2370void 3285int
2371ev_run (EV_P_ int flags) 3286ev_run (EV_P_ int flags)
2372{ 3287{
2373#if EV_FEATURE_API 3288#if EV_FEATURE_API
2374 ++loop_depth; 3289 ++loop_depth;
2375#endif 3290#endif
… …
2433 ev_tstamp prev_mn_now = mn_now; 3348 ev_tstamp prev_mn_now = mn_now;
2434 3349
2435 /* update time to cancel out callback processing overhead */ 3350 /* update time to cancel out callback processing overhead */
2436 time_update (EV_A_ 1e100); 3351 time_update (EV_A_ 1e100);
2437 3352
3353 /* from now on, we want a pipe-wake-up */
3354 pipe_write_wanted = 1;
3355
3356 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3357
2438 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3358 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2439 { 3359 {
2440 waittime = MAX_BLOCKTIME; 3360 waittime = MAX_BLOCKTIME;
2441 3361
2442 if (timercnt) 3362 if (timercnt)
2443 { 3363 {
2444 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3364 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445 if (waittime > to) waittime = to; 3365 if (waittime > to) waittime = to;
2446 } 3366 }
2447 3367
2448#if EV_PERIODIC_ENABLE 3368#if EV_PERIODIC_ENABLE
2449 if (periodiccnt) 3369 if (periodiccnt)
2450 { 3370 {
2451 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3371 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452 if (waittime > to) waittime = to; 3372 if (waittime > to) waittime = to;
2453 } 3373 }
2454#endif 3374#endif
2455 3375
2456 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3376 /* don't let timeouts decrease the waittime below timeout_blocktime */
2457 if (expect_false (waittime < timeout_blocktime)) 3377 if (expect_false (waittime < timeout_blocktime))
2458 waittime = timeout_blocktime; 3378 waittime = timeout_blocktime;
3379
3380 /* at this point, we NEED to wait, so we have to ensure */
3381 /* to pass a minimum nonzero value to the backend */
3382 if (expect_false (waittime < backend_mintime))
3383 waittime = backend_mintime;
2459 3384
2460 /* extra check because io_blocktime is commonly 0 */ 3385 /* extra check because io_blocktime is commonly 0 */
2461 if (expect_false (io_blocktime)) 3386 if (expect_false (io_blocktime))
2462 { 3387 {
2463 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3388 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464 3389
2465 if (sleeptime > waittime - backend_fudge) 3390 if (sleeptime > waittime - backend_mintime)
2466 sleeptime = waittime - backend_fudge; 3391 sleeptime = waittime - backend_mintime;
2467 3392
2468 if (expect_true (sleeptime > 0.)) 3393 if (expect_true (sleeptime > 0.))
2469 { 3394 {
2470 ev_sleep (sleeptime); 3395 ev_sleep (sleeptime);
2471 waittime -= sleeptime; 3396 waittime -= sleeptime;
… …
2478#endif 3403#endif
2479 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3404 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480 backend_poll (EV_A_ waittime); 3405 backend_poll (EV_A_ waittime);
2481 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3406 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2482 3407
3408 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3409
3410 ECB_MEMORY_FENCE_ACQUIRE;
3411 if (pipe_write_skipped)
3412 {
3413 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3414 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3415 }
3416
3417
2483 /* update ev_rt_now, do magic */ 3418 /* update ev_rt_now, do magic */
2484 time_update (EV_A_ waittime + sleeptime); 3419 time_update (EV_A_ waittime + sleeptime);
2485 } 3420 }
2486 3421
2487 /* queue pending timers and reschedule them */ 3422 /* queue pending timers and reschedule them */
… …
2513 loop_done = EVBREAK_CANCEL; 3448 loop_done = EVBREAK_CANCEL;
2514 3449
2515#if EV_FEATURE_API 3450#if EV_FEATURE_API
2516 --loop_depth; 3451 --loop_depth;
2517#endif 3452#endif
3453
3454 return activecnt;
2518} 3455}
2519 3456
2520void 3457void
2521ev_break (EV_P_ int how) 3458ev_break (EV_P_ int how) EV_THROW
2522{ 3459{
2523 loop_done = how; 3460 loop_done = how;
2524} 3461}
2525 3462
2526void 3463void
2527ev_ref (EV_P) 3464ev_ref (EV_P) EV_THROW
2528{ 3465{
2529 ++activecnt; 3466 ++activecnt;
2530} 3467}
2531 3468
2532void 3469void
2533ev_unref (EV_P) 3470ev_unref (EV_P) EV_THROW
2534{ 3471{
2535 --activecnt; 3472 --activecnt;
2536} 3473}
2537 3474
2538void 3475void
2539ev_now_update (EV_P) 3476ev_now_update (EV_P) EV_THROW
2540{ 3477{
2541 time_update (EV_A_ 1e100); 3478 time_update (EV_A_ 1e100);
2542} 3479}
2543 3480
2544void 3481void
2545ev_suspend (EV_P) 3482ev_suspend (EV_P) EV_THROW
2546{ 3483{
2547 ev_now_update (EV_A); 3484 ev_now_update (EV_A);
2548} 3485}
2549 3486
2550void 3487void
2551ev_resume (EV_P) 3488ev_resume (EV_P) EV_THROW
2552{ 3489{
2553 ev_tstamp mn_prev = mn_now; 3490 ev_tstamp mn_prev = mn_now;
2554 3491
2555 ev_now_update (EV_A); 3492 ev_now_update (EV_A);
2556 timers_reschedule (EV_A_ mn_now - mn_prev); 3493 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2595 w->pending = 0; 3532 w->pending = 0;
2596 } 3533 }
2597} 3534}
2598 3535
2599int 3536int
2600ev_clear_pending (EV_P_ void *w) 3537ev_clear_pending (EV_P_ void *w) EV_THROW
2601{ 3538{
2602 W w_ = (W)w; 3539 W w_ = (W)w;
2603 int pending = w_->pending; 3540 int pending = w_->pending;
2604 3541
2605 if (expect_true (pending)) 3542 if (expect_true (pending))
… …
2638} 3575}
2639 3576
2640/*****************************************************************************/ 3577/*****************************************************************************/
2641 3578
2642void noinline 3579void noinline
2643ev_io_start (EV_P_ ev_io *w) 3580ev_io_start (EV_P_ ev_io *w) EV_THROW
2644{ 3581{
2645 int fd = w->fd; 3582 int fd = w->fd;
2646 3583
2647 if (expect_false (ev_is_active (w))) 3584 if (expect_false (ev_is_active (w)))
2648 return; 3585 return;
… …
2654 3591
2655 ev_start (EV_A_ (W)w, 1); 3592 ev_start (EV_A_ (W)w, 1);
2656 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3593 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2657 wlist_add (&anfds[fd].head, (WL)w); 3594 wlist_add (&anfds[fd].head, (WL)w);
2658 3595
3596 /* common bug, apparently */
3597 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3598
2659 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3599 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2660 w->events &= ~EV__IOFDSET; 3600 w->events &= ~EV__IOFDSET;
2661 3601
2662 EV_FREQUENT_CHECK; 3602 EV_FREQUENT_CHECK;
2663} 3603}
2664 3604
2665void noinline 3605void noinline
2666ev_io_stop (EV_P_ ev_io *w) 3606ev_io_stop (EV_P_ ev_io *w) EV_THROW
2667{ 3607{
2668 clear_pending (EV_A_ (W)w); 3608 clear_pending (EV_A_ (W)w);
2669 if (expect_false (!ev_is_active (w))) 3609 if (expect_false (!ev_is_active (w)))
2670 return; 3610 return;
2671 3611
… …
2680 3620
2681 EV_FREQUENT_CHECK; 3621 EV_FREQUENT_CHECK;
2682} 3622}
2683 3623
2684void noinline 3624void noinline
2685ev_timer_start (EV_P_ ev_timer *w) 3625ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2686{ 3626{
2687 if (expect_false (ev_is_active (w))) 3627 if (expect_false (ev_is_active (w)))
2688 return; 3628 return;
2689 3629
2690 ev_at (w) += mn_now; 3630 ev_at (w) += mn_now;
… …
2704 3644
2705 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3645 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2706} 3646}
2707 3647
2708void noinline 3648void noinline
2709ev_timer_stop (EV_P_ ev_timer *w) 3649ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2710{ 3650{
2711 clear_pending (EV_A_ (W)w); 3651 clear_pending (EV_A_ (W)w);
2712 if (expect_false (!ev_is_active (w))) 3652 if (expect_false (!ev_is_active (w)))
2713 return; 3653 return;
2714 3654
… …
2734 3674
2735 EV_FREQUENT_CHECK; 3675 EV_FREQUENT_CHECK;
2736} 3676}
2737 3677
2738void noinline 3678void noinline
2739ev_timer_again (EV_P_ ev_timer *w) 3679ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2740{ 3680{
2741 EV_FREQUENT_CHECK; 3681 EV_FREQUENT_CHECK;
3682
3683 clear_pending (EV_A_ (W)w);
2742 3684
2743 if (ev_is_active (w)) 3685 if (ev_is_active (w))
2744 { 3686 {
2745 if (w->repeat) 3687 if (w->repeat)
2746 { 3688 {
… …
2759 3701
2760 EV_FREQUENT_CHECK; 3702 EV_FREQUENT_CHECK;
2761} 3703}
2762 3704
2763ev_tstamp 3705ev_tstamp
2764ev_timer_remaining (EV_P_ ev_timer *w) 3706ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2765{ 3707{
2766 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3708 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2767} 3709}
2768 3710
2769#if EV_PERIODIC_ENABLE 3711#if EV_PERIODIC_ENABLE
2770void noinline 3712void noinline
2771ev_periodic_start (EV_P_ ev_periodic *w) 3713ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2772{ 3714{
2773 if (expect_false (ev_is_active (w))) 3715 if (expect_false (ev_is_active (w)))
2774 return; 3716 return;
2775 3717
2776 if (w->reschedule_cb) 3718 if (w->reschedule_cb)
… …
2796 3738
2797 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3739 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2798} 3740}
2799 3741
2800void noinline 3742void noinline
2801ev_periodic_stop (EV_P_ ev_periodic *w) 3743ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2802{ 3744{
2803 clear_pending (EV_A_ (W)w); 3745 clear_pending (EV_A_ (W)w);
2804 if (expect_false (!ev_is_active (w))) 3746 if (expect_false (!ev_is_active (w)))
2805 return; 3747 return;
2806 3748
… …
2824 3766
2825 EV_FREQUENT_CHECK; 3767 EV_FREQUENT_CHECK;
2826} 3768}
2827 3769
2828void noinline 3770void noinline
2829ev_periodic_again (EV_P_ ev_periodic *w) 3771ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2830{ 3772{
2831 /* TODO: use adjustheap and recalculation */ 3773 /* TODO: use adjustheap and recalculation */
2832 ev_periodic_stop (EV_A_ w); 3774 ev_periodic_stop (EV_A_ w);
2833 ev_periodic_start (EV_A_ w); 3775 ev_periodic_start (EV_A_ w);
2834} 3776}
… …
2839#endif 3781#endif
2840 3782
2841#if EV_SIGNAL_ENABLE 3783#if EV_SIGNAL_ENABLE
2842 3784
2843void noinline 3785void noinline
2844ev_signal_start (EV_P_ ev_signal *w) 3786ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2845{ 3787{
2846 if (expect_false (ev_is_active (w))) 3788 if (expect_false (ev_is_active (w)))
2847 return; 3789 return;
2848 3790
2849 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3791 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2851#if EV_MULTIPLICITY 3793#if EV_MULTIPLICITY
2852 assert (("libev: a signal must not be attached to two different loops", 3794 assert (("libev: a signal must not be attached to two different loops",
2853 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3795 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2854 3796
2855 signals [w->signum - 1].loop = EV_A; 3797 signals [w->signum - 1].loop = EV_A;
3798 ECB_MEMORY_FENCE_RELEASE;
2856#endif 3799#endif
2857 3800
2858 EV_FREQUENT_CHECK; 3801 EV_FREQUENT_CHECK;
2859 3802
2860#if EV_USE_SIGNALFD 3803#if EV_USE_SIGNALFD
… …
2920 3863
2921 EV_FREQUENT_CHECK; 3864 EV_FREQUENT_CHECK;
2922} 3865}
2923 3866
2924void noinline 3867void noinline
2925ev_signal_stop (EV_P_ ev_signal *w) 3868ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2926{ 3869{
2927 clear_pending (EV_A_ (W)w); 3870 clear_pending (EV_A_ (W)w);
2928 if (expect_false (!ev_is_active (w))) 3871 if (expect_false (!ev_is_active (w)))
2929 return; 3872 return;
2930 3873
… …
2961#endif 3904#endif
2962 3905
2963#if EV_CHILD_ENABLE 3906#if EV_CHILD_ENABLE
2964 3907
2965void 3908void
2966ev_child_start (EV_P_ ev_child *w) 3909ev_child_start (EV_P_ ev_child *w) EV_THROW
2967{ 3910{
2968#if EV_MULTIPLICITY 3911#if EV_MULTIPLICITY
2969 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3912 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2970#endif 3913#endif
2971 if (expect_false (ev_is_active (w))) 3914 if (expect_false (ev_is_active (w)))
… …
2978 3921
2979 EV_FREQUENT_CHECK; 3922 EV_FREQUENT_CHECK;
2980} 3923}
2981 3924
2982void 3925void
2983ev_child_stop (EV_P_ ev_child *w) 3926ev_child_stop (EV_P_ ev_child *w) EV_THROW
2984{ 3927{
2985 clear_pending (EV_A_ (W)w); 3928 clear_pending (EV_A_ (W)w);
2986 if (expect_false (!ev_is_active (w))) 3929 if (expect_false (!ev_is_active (w)))
2987 return; 3930 return;
2988 3931
… …
3015# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3958# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3016 3959
3017static void noinline 3960static void noinline
3018infy_add (EV_P_ ev_stat *w) 3961infy_add (EV_P_ ev_stat *w)
3019{ 3962{
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); 3963 w->wd = inotify_add_watch (fs_fd, w->path,
3964 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3965 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3966 | IN_DONT_FOLLOW | IN_MASK_ADD);
3021 3967
3022 if (w->wd >= 0) 3968 if (w->wd >= 0)
3023 { 3969 {
3024 struct statfs sfs; 3970 struct statfs sfs;
3025 3971
… …
3029 3975
3030 if (!fs_2625) 3976 if (!fs_2625)
3031 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3977 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3032 else if (!statfs (w->path, &sfs) 3978 else if (!statfs (w->path, &sfs)
3033 && (sfs.f_type == 0x1373 /* devfs */ 3979 && (sfs.f_type == 0x1373 /* devfs */
3980 || sfs.f_type == 0x4006 /* fat */
3981 || sfs.f_type == 0x4d44 /* msdos */
3034 || sfs.f_type == 0xEF53 /* ext2/3 */ 3982 || sfs.f_type == 0xEF53 /* ext2/3 */
3983 || sfs.f_type == 0x72b6 /* jffs2 */
3984 || sfs.f_type == 0x858458f6 /* ramfs */
3985 || sfs.f_type == 0x5346544e /* ntfs */
3035 || sfs.f_type == 0x3153464a /* jfs */ 3986 || sfs.f_type == 0x3153464a /* jfs */
3987 || sfs.f_type == 0x9123683e /* btrfs */
3036 || sfs.f_type == 0x52654973 /* reiser3 */ 3988 || sfs.f_type == 0x52654973 /* reiser3 */
3037 || sfs.f_type == 0x01021994 /* tempfs */ 3989 || sfs.f_type == 0x01021994 /* tmpfs */
3038 || sfs.f_type == 0x58465342 /* xfs */)) 3990 || sfs.f_type == 0x58465342 /* xfs */))
3039 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3991 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3040 else 3992 else
3041 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3993 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3042 } 3994 }
… …
3063 if (!pend || pend == path) 4015 if (!pend || pend == path)
3064 break; 4016 break;
3065 4017
3066 *pend = 0; 4018 *pend = 0;
3067 w->wd = inotify_add_watch (fs_fd, path, mask); 4019 w->wd = inotify_add_watch (fs_fd, path, mask);
3068 } 4020 }
3069 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4021 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3070 } 4022 }
3071 } 4023 }
3072 4024
3073 if (w->wd >= 0) 4025 if (w->wd >= 0)
… …
3140 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4092 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141 ofs += sizeof (struct inotify_event) + ev->len; 4093 ofs += sizeof (struct inotify_event) + ev->len;
3142 } 4094 }
3143} 4095}
3144 4096
3145inline_size void 4097inline_size void ecb_cold
3146ev_check_2625 (EV_P) 4098ev_check_2625 (EV_P)
3147{ 4099{
3148 /* kernels < 2.6.25 are borked 4100 /* kernels < 2.6.25 are borked
3149 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4101 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150 */ 4102 */
… …
3155} 4107}
3156 4108
3157inline_size int 4109inline_size int
3158infy_newfd (void) 4110infy_newfd (void)
3159{ 4111{
3160#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4112#if defined IN_CLOEXEC && defined IN_NONBLOCK
3161 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4113 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3162 if (fd >= 0) 4114 if (fd >= 0)
3163 return fd; 4115 return fd;
3164#endif 4116#endif
3165 return inotify_init (); 4117 return inotify_init ();
… …
3240#else 4192#else
3241# define EV_LSTAT(p,b) lstat (p, b) 4193# define EV_LSTAT(p,b) lstat (p, b)
3242#endif 4194#endif
3243 4195
3244void 4196void
3245ev_stat_stat (EV_P_ ev_stat *w) 4197ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3246{ 4198{
3247 if (lstat (w->path, &w->attr) < 0) 4199 if (lstat (w->path, &w->attr) < 0)
3248 w->attr.st_nlink = 0; 4200 w->attr.st_nlink = 0;
3249 else if (!w->attr.st_nlink) 4201 else if (!w->attr.st_nlink)
3250 w->attr.st_nlink = 1; 4202 w->attr.st_nlink = 1;
… …
3289 ev_feed_event (EV_A_ w, EV_STAT); 4241 ev_feed_event (EV_A_ w, EV_STAT);
3290 } 4242 }
3291} 4243}
3292 4244
3293void 4245void
3294ev_stat_start (EV_P_ ev_stat *w) 4246ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3295{ 4247{
3296 if (expect_false (ev_is_active (w))) 4248 if (expect_false (ev_is_active (w)))
3297 return; 4249 return;
3298 4250
3299 ev_stat_stat (EV_A_ w); 4251 ev_stat_stat (EV_A_ w);
… …
3320 4272
3321 EV_FREQUENT_CHECK; 4273 EV_FREQUENT_CHECK;
3322} 4274}
3323 4275
3324void 4276void
3325ev_stat_stop (EV_P_ ev_stat *w) 4277ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3326{ 4278{
3327 clear_pending (EV_A_ (W)w); 4279 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w))) 4280 if (expect_false (!ev_is_active (w)))
3329 return; 4281 return;
3330 4282
… …
3346} 4298}
3347#endif 4299#endif
3348 4300
3349#if EV_IDLE_ENABLE 4301#if EV_IDLE_ENABLE
3350void 4302void
3351ev_idle_start (EV_P_ ev_idle *w) 4303ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3352{ 4304{
3353 if (expect_false (ev_is_active (w))) 4305 if (expect_false (ev_is_active (w)))
3354 return; 4306 return;
3355 4307
3356 pri_adjust (EV_A_ (W)w); 4308 pri_adjust (EV_A_ (W)w);
… …
3369 4321
3370 EV_FREQUENT_CHECK; 4322 EV_FREQUENT_CHECK;
3371} 4323}
3372 4324
3373void 4325void
3374ev_idle_stop (EV_P_ ev_idle *w) 4326ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3375{ 4327{
3376 clear_pending (EV_A_ (W)w); 4328 clear_pending (EV_A_ (W)w);
3377 if (expect_false (!ev_is_active (w))) 4329 if (expect_false (!ev_is_active (w)))
3378 return; 4330 return;
3379 4331
… …
3393} 4345}
3394#endif 4346#endif
3395 4347
3396#if EV_PREPARE_ENABLE 4348#if EV_PREPARE_ENABLE
3397void 4349void
3398ev_prepare_start (EV_P_ ev_prepare *w) 4350ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3399{ 4351{
3400 if (expect_false (ev_is_active (w))) 4352 if (expect_false (ev_is_active (w)))
3401 return; 4353 return;
3402 4354
3403 EV_FREQUENT_CHECK; 4355 EV_FREQUENT_CHECK;
… …
3408 4360
3409 EV_FREQUENT_CHECK; 4361 EV_FREQUENT_CHECK;
3410} 4362}
3411 4363
3412void 4364void
3413ev_prepare_stop (EV_P_ ev_prepare *w) 4365ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3414{ 4366{
3415 clear_pending (EV_A_ (W)w); 4367 clear_pending (EV_A_ (W)w);
3416 if (expect_false (!ev_is_active (w))) 4368 if (expect_false (!ev_is_active (w)))
3417 return; 4369 return;
3418 4370
… …
3431} 4383}
3432#endif 4384#endif
3433 4385
3434#if EV_CHECK_ENABLE 4386#if EV_CHECK_ENABLE
3435void 4387void
3436ev_check_start (EV_P_ ev_check *w) 4388ev_check_start (EV_P_ ev_check *w) EV_THROW
3437{ 4389{
3438 if (expect_false (ev_is_active (w))) 4390 if (expect_false (ev_is_active (w)))
3439 return; 4391 return;
3440 4392
3441 EV_FREQUENT_CHECK; 4393 EV_FREQUENT_CHECK;
… …
3446 4398
3447 EV_FREQUENT_CHECK; 4399 EV_FREQUENT_CHECK;
3448} 4400}
3449 4401
3450void 4402void
3451ev_check_stop (EV_P_ ev_check *w) 4403ev_check_stop (EV_P_ ev_check *w) EV_THROW
3452{ 4404{
3453 clear_pending (EV_A_ (W)w); 4405 clear_pending (EV_A_ (W)w);
3454 if (expect_false (!ev_is_active (w))) 4406 if (expect_false (!ev_is_active (w)))
3455 return; 4407 return;
3456 4408
… …
3469} 4421}
3470#endif 4422#endif
3471 4423
3472#if EV_EMBED_ENABLE 4424#if EV_EMBED_ENABLE
3473void noinline 4425void noinline
3474ev_embed_sweep (EV_P_ ev_embed *w) 4426ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3475{ 4427{
3476 ev_run (w->other, EVRUN_NOWAIT); 4428 ev_run (w->other, EVRUN_NOWAIT);
3477} 4429}
3478 4430
3479static void 4431static void
… …
3527 ev_idle_stop (EV_A_ idle); 4479 ev_idle_stop (EV_A_ idle);
3528} 4480}
3529#endif 4481#endif
3530 4482
3531void 4483void
3532ev_embed_start (EV_P_ ev_embed *w) 4484ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3533{ 4485{
3534 if (expect_false (ev_is_active (w))) 4486 if (expect_false (ev_is_active (w)))
3535 return; 4487 return;
3536 4488
3537 { 4489 {
… …
3558 4510
3559 EV_FREQUENT_CHECK; 4511 EV_FREQUENT_CHECK;
3560} 4512}
3561 4513
3562void 4514void
3563ev_embed_stop (EV_P_ ev_embed *w) 4515ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3564{ 4516{
3565 clear_pending (EV_A_ (W)w); 4517 clear_pending (EV_A_ (W)w);
3566 if (expect_false (!ev_is_active (w))) 4518 if (expect_false (!ev_is_active (w)))
3567 return; 4519 return;
3568 4520
… …
3578} 4530}
3579#endif 4531#endif
3580 4532
3581#if EV_FORK_ENABLE 4533#if EV_FORK_ENABLE
3582void 4534void
3583ev_fork_start (EV_P_ ev_fork *w) 4535ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3584{ 4536{
3585 if (expect_false (ev_is_active (w))) 4537 if (expect_false (ev_is_active (w)))
3586 return; 4538 return;
3587 4539
3588 EV_FREQUENT_CHECK; 4540 EV_FREQUENT_CHECK;
… …
3593 4545
3594 EV_FREQUENT_CHECK; 4546 EV_FREQUENT_CHECK;
3595} 4547}
3596 4548
3597void 4549void
3598ev_fork_stop (EV_P_ ev_fork *w) 4550ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3599{ 4551{
3600 clear_pending (EV_A_ (W)w); 4552 clear_pending (EV_A_ (W)w);
3601 if (expect_false (!ev_is_active (w))) 4553 if (expect_false (!ev_is_active (w)))
3602 return; 4554 return;
3603 4555
… …
3616} 4568}
3617#endif 4569#endif
3618 4570
3619#if EV_CLEANUP_ENABLE 4571#if EV_CLEANUP_ENABLE
3620void 4572void
3621ev_cleanup_start (EV_P_ ev_cleanup *w) 4573ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3622{ 4574{
3623 if (expect_false (ev_is_active (w))) 4575 if (expect_false (ev_is_active (w)))
3624 return; 4576 return;
3625 4577
3626 EV_FREQUENT_CHECK; 4578 EV_FREQUENT_CHECK;
… …
3633 ev_unref (EV_A); 4585 ev_unref (EV_A);
3634 EV_FREQUENT_CHECK; 4586 EV_FREQUENT_CHECK;
3635} 4587}
3636 4588
3637void 4589void
3638ev_cleanup_stop (EV_P_ ev_cleanup *w) 4590ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3639{ 4591{
3640 clear_pending (EV_A_ (W)w); 4592 clear_pending (EV_A_ (W)w);
3641 if (expect_false (!ev_is_active (w))) 4593 if (expect_false (!ev_is_active (w)))
3642 return; 4594 return;
3643 4595
… …
3657} 4609}
3658#endif 4610#endif
3659 4611
3660#if EV_ASYNC_ENABLE 4612#if EV_ASYNC_ENABLE
3661void 4613void
3662ev_async_start (EV_P_ ev_async *w) 4614ev_async_start (EV_P_ ev_async *w) EV_THROW
3663{ 4615{
3664 if (expect_false (ev_is_active (w))) 4616 if (expect_false (ev_is_active (w)))
3665 return; 4617 return;
3666 4618
3667 w->sent = 0; 4619 w->sent = 0;
… …
3676 4628
3677 EV_FREQUENT_CHECK; 4629 EV_FREQUENT_CHECK;
3678} 4630}
3679 4631
3680void 4632void
3681ev_async_stop (EV_P_ ev_async *w) 4633ev_async_stop (EV_P_ ev_async *w) EV_THROW
3682{ 4634{
3683 clear_pending (EV_A_ (W)w); 4635 clear_pending (EV_A_ (W)w);
3684 if (expect_false (!ev_is_active (w))) 4636 if (expect_false (!ev_is_active (w)))
3685 return; 4637 return;
3686 4638
… …
3697 4649
3698 EV_FREQUENT_CHECK; 4650 EV_FREQUENT_CHECK;
3699} 4651}
3700 4652
3701void 4653void
3702ev_async_send (EV_P_ ev_async *w) 4654ev_async_send (EV_P_ ev_async *w) EV_THROW
3703{ 4655{
3704 w->sent = 1; 4656 w->sent = 1;
3705 evpipe_write (EV_A_ &async_pending); 4657 evpipe_write (EV_A_ &async_pending);
3706} 4658}
3707#endif 4659#endif
… …
3744 4696
3745 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4697 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3746} 4698}
3747 4699
3748void 4700void
3749ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4701ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3750{ 4702{
3751 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4703 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3752 4704
3753 if (expect_false (!once)) 4705 if (expect_false (!once))
3754 { 4706 {
… …
3775} 4727}
3776 4728
3777/*****************************************************************************/ 4729/*****************************************************************************/
3778 4730
3779#if EV_WALK_ENABLE 4731#if EV_WALK_ENABLE
3780void 4732void ecb_cold
3781ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4733ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3782{ 4734{
3783 int i, j; 4735 int i, j;
3784 ev_watcher_list *wl, *wn; 4736 ev_watcher_list *wl, *wn;
3785 4737
3786 if (types & (EV_IO | EV_EMBED)) 4738 if (types & (EV_IO | EV_EMBED))
… …
3829 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4781 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3830#endif 4782#endif
3831 4783
3832#if EV_IDLE_ENABLE 4784#if EV_IDLE_ENABLE
3833 if (types & EV_IDLE) 4785 if (types & EV_IDLE)
3834 for (j = NUMPRI; i--; ) 4786 for (j = NUMPRI; j--; )
3835 for (i = idlecnt [j]; i--; ) 4787 for (i = idlecnt [j]; i--; )
3836 cb (EV_A_ EV_IDLE, idles [j][i]); 4788 cb (EV_A_ EV_IDLE, idles [j][i]);
3837#endif 4789#endif
3838 4790
3839#if EV_FORK_ENABLE 4791#if EV_FORK_ENABLE
… …
3892 4844
3893#if EV_MULTIPLICITY 4845#if EV_MULTIPLICITY
3894 #include "ev_wrap.h" 4846 #include "ev_wrap.h"
3895#endif 4847#endif
3896 4848
3897EV_CPP(})
3898

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