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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 1.458 by root, Sun Oct 27 16:26:07 2013 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
156# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
157# endif 163# endif
158 164
159#endif 165#endif
160 166
161#include <math.h>
162#include <stdlib.h> 167#include <stdlib.h>
163#include <string.h> 168#include <string.h>
164#include <fcntl.h> 169#include <fcntl.h>
165#include <stddef.h> 170#include <stddef.h>
166 171
… …
178# include EV_H 183# include EV_H
179#else 184#else
180# include "ev.h" 185# include "ev.h"
181#endif 186#endif
182 187
183EV_CPP(extern "C" {) 188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
184 198
185#ifndef _WIN32 199#ifndef _WIN32
186# include <sys/time.h> 200# include <sys/time.h>
187# include <sys/wait.h> 201# include <sys/wait.h>
188# include <unistd.h> 202# include <unistd.h>
189#else 203#else
190# include <io.h> 204# include <io.h>
191# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
192# include <windows.h> 207# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
195# endif 210# endif
196# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
205#define _DARWIN_UNLIMITED_SELECT 1 220#define _DARWIN_UNLIMITED_SELECT 1
206 221
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
208 223
209/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 225#if defined EV_NSIG
211/* use what's provided */ 226/* use what's provided */
212#elif defined (NSIG) 227#elif defined NSIG
213# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 229#elif defined _NSIG
215# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 231#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 233#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 237#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 239#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 243#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 245#else
231# error "unable to find value for NSIG, please report" 246# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */ 247/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */ 248/* but consider reporting it, too! :) */
234# define EV_NSIG 65 249# define EV_NSIG 65
235#endif 250#endif
236 251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
237#ifndef EV_USE_CLOCK_SYSCALL 256#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 257# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 259# else
241# define EV_USE_CLOCK_SYSCALL 0 260# define EV_USE_CLOCK_SYSCALL 0
242# endif 261# endif
243#endif 262#endif
244 263
245#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 266# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 267# else
249# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
250# endif 269# endif
251#endif 270#endif
… …
338 357
339#ifndef EV_HEAP_CACHE_AT 358#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 360#endif
342 361
362#ifdef ANDROID
363/* supposedly, android doesn't typedef fd_mask */
364# undef EV_USE_SELECT
365# define EV_USE_SELECT 0
366/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
367# undef EV_USE_CLOCK_SYSCALL
368# define EV_USE_CLOCK_SYSCALL 0
369#endif
370
371/* aix's poll.h seems to cause lots of trouble */
372#ifdef _AIX
373/* AIX has a completely broken poll.h header */
374# undef EV_USE_POLL
375# define EV_USE_POLL 0
376#endif
377
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 378/* 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. */ 379/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 380#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 381# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 382# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 383# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 385# define EV_USE_MONOTONIC 1
351# else 386# else
… …
354# endif 389# endif
355#endif 390#endif
356 391
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 392/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 393
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 394#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 395# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 396# define EV_USE_MONOTONIC 0
368#endif 397#endif
369 398
… …
377# define EV_USE_INOTIFY 0 406# define EV_USE_INOTIFY 0
378#endif 407#endif
379 408
380#if !EV_USE_NANOSLEEP 409#if !EV_USE_NANOSLEEP
381/* hp-ux has it in sys/time.h, which we unconditionally include above */ 410/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux) 411# if !defined _WIN32 && !defined __hpux
383# include <sys/select.h> 412# include <sys/select.h>
384# endif 413# endif
385#endif 414#endif
386 415
387#if EV_USE_INOTIFY 416#if EV_USE_INOTIFY
… …
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 419/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 420# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 421# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 422# define EV_USE_INOTIFY 0
394# endif 423# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 424#endif
400 425
401#if EV_USE_EVENTFD 426#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 428# include <stdint.h>
… …
443#else 468#else
444# define EV_FREQUENT_CHECK do { } while (0) 469# define EV_FREQUENT_CHECK do { } while (0)
445#endif 470#endif
446 471
447/* 472/*
448 * This is used to avoid floating point rounding problems. 473 * 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. 474 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 475 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 476#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
477/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 478
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 479#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) */ 480#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 481
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 482#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) 483#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 484
485/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
486/* ECB.H BEGIN */
487/*
488 * libecb - http://software.schmorp.de/pkg/libecb
489 *
490 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
491 * Copyright (©) 2011 Emanuele Giaquinta
492 * All rights reserved.
493 *
494 * Redistribution and use in source and binary forms, with or without modifica-
495 * tion, are permitted provided that the following conditions are met:
496 *
497 * 1. Redistributions of source code must retain the above copyright notice,
498 * this list of conditions and the following disclaimer.
499 *
500 * 2. Redistributions in binary form must reproduce the above copyright
501 * notice, this list of conditions and the following disclaimer in the
502 * documentation and/or other materials provided with the distribution.
503 *
504 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
505 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
506 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
507 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
508 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
509 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
510 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
511 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
512 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
513 * OF THE POSSIBILITY OF SUCH DAMAGE.
514 */
515
516#ifndef ECB_H
517#define ECB_H
518
519/* 16 bits major, 16 bits minor */
520#define ECB_VERSION 0x00010003
521
522#ifdef _WIN32
523 typedef signed char int8_t;
524 typedef unsigned char uint8_t;
525 typedef signed short int16_t;
526 typedef unsigned short uint16_t;
527 typedef signed int int32_t;
528 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 529 #if __GNUC__
464# define expect(expr,value) __builtin_expect ((expr),(value)) 530 typedef signed long long int64_t;
465# define noinline __attribute__ ((noinline)) 531 typedef unsigned long long uint64_t;
532 #else /* _MSC_VER || __BORLANDC__ */
533 typedef signed __int64 int64_t;
534 typedef unsigned __int64 uint64_t;
535 #endif
536 #ifdef _WIN64
537 #define ECB_PTRSIZE 8
538 typedef uint64_t uintptr_t;
539 typedef int64_t intptr_t;
540 #else
541 #define ECB_PTRSIZE 4
542 typedef uint32_t uintptr_t;
543 typedef int32_t intptr_t;
544 #endif
466#else 545#else
467# define expect(expr,value) (expr) 546 #include <inttypes.h>
468# define noinline 547 #if UINTMAX_MAX > 0xffffffffU
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 548 #define ECB_PTRSIZE 8
470# define inline 549 #else
550 #define ECB_PTRSIZE 4
551 #endif
471# endif 552#endif
553
554/* work around x32 idiocy by defining proper macros */
555#if __x86_64 || _M_AMD64
556 #if _ILP32
557 #define ECB_AMD64_X32 1
558 #else
559 #define ECB_AMD64 1
472#endif 560 #endif
561#endif
473 562
563/* many compilers define _GNUC_ to some versions but then only implement
564 * what their idiot authors think are the "more important" extensions,
565 * causing enormous grief in return for some better fake benchmark numbers.
566 * or so.
567 * we try to detect these and simply assume they are not gcc - if they have
568 * an issue with that they should have done it right in the first place.
569 */
570#ifndef ECB_GCC_VERSION
571 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
572 #define ECB_GCC_VERSION(major,minor) 0
573 #else
574 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
575 #endif
576#endif
577
578#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
579#define ECB_C99 (__STDC_VERSION__ >= 199901L)
580#define ECB_C11 (__STDC_VERSION__ >= 201112L)
581#define ECB_CPP (__cplusplus+0)
582#define ECB_CPP11 (__cplusplus >= 201103L)
583
584#if ECB_CPP
585 #define ECB_EXTERN_C extern "C"
586 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
587 #define ECB_EXTERN_C_END }
588#else
589 #define ECB_EXTERN_C extern
590 #define ECB_EXTERN_C_BEG
591 #define ECB_EXTERN_C_END
592#endif
593
594/*****************************************************************************/
595
596/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
597/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
598
599#if ECB_NO_THREADS
600 #define ECB_NO_SMP 1
601#endif
602
603#if ECB_NO_SMP
604 #define ECB_MEMORY_FENCE do { } while (0)
605#endif
606
607#ifndef ECB_MEMORY_FENCE
608 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
609 #if __i386 || __i386__
610 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
611 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
612 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
613 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
614 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
615 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
616 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
617 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
618 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
619 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
620 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
622 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
623 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
624 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
625 #elif __sparc || __sparc__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
629 #elif defined __s390__ || defined __s390x__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
631 #elif defined __mips__
632 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
633 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
635 #elif defined __alpha__
636 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
637 #elif defined __hppa__
638 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
639 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
640 #elif defined __ia64__
641 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
642 #elif defined __m68k__
643 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
644 #elif defined __m88k__
645 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
646 #elif defined __sh__
647 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
648 #endif
649 #endif
650#endif
651
652#ifndef ECB_MEMORY_FENCE
653 #if ECB_GCC_VERSION(4,7)
654 /* see comment below (stdatomic.h) about the C11 memory model. */
655 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
656
657 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
658 * without risking compile time errors with other compilers. We *could*
659 * define our own ecb_clang_has_feature, but I just can't be bothered to work
660 * around this shit time and again.
661 * #elif defined __clang && __has_feature (cxx_atomic)
662 * // see comment below (stdatomic.h) about the C11 memory model.
663 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
664 */
665
666 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
667 #define ECB_MEMORY_FENCE __sync_synchronize ()
668 #elif _MSC_VER >= 1400 /* VC++ 2005 */
669 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
670 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
671 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
672 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
673 #elif defined _WIN32
674 #include <WinNT.h>
675 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
676 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
677 #include <mbarrier.h>
678 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
679 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
680 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
681 #elif __xlC__
682 #define ECB_MEMORY_FENCE __sync ()
683 #endif
684#endif
685
686#ifndef ECB_MEMORY_FENCE
687 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
688 /* we assume that these memory fences work on all variables/all memory accesses, */
689 /* not just C11 atomics and atomic accesses */
690 #include <stdatomic.h>
691 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
692 /* any fence other than seq_cst, which isn't very efficient for us. */
693 /* Why that is, we don't know - either the C11 memory model is quite useless */
694 /* for most usages, or gcc and clang have a bug */
695 /* I *currently* lean towards the latter, and inefficiently implement */
696 /* all three of ecb's fences as a seq_cst fence */
697 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
698 #endif
699#endif
700
701#ifndef ECB_MEMORY_FENCE
702 #if !ECB_AVOID_PTHREADS
703 /*
704 * if you get undefined symbol references to pthread_mutex_lock,
705 * or failure to find pthread.h, then you should implement
706 * the ECB_MEMORY_FENCE operations for your cpu/compiler
707 * OR provide pthread.h and link against the posix thread library
708 * of your system.
709 */
710 #include <pthread.h>
711 #define ECB_NEEDS_PTHREADS 1
712 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
713
714 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
715 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
716 #endif
717#endif
718
719#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
720 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
721#endif
722
723#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
724 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
725#endif
726
727/*****************************************************************************/
728
729#if __cplusplus
730 #define ecb_inline static inline
731#elif ECB_GCC_VERSION(2,5)
732 #define ecb_inline static __inline__
733#elif ECB_C99
734 #define ecb_inline static inline
735#else
736 #define ecb_inline static
737#endif
738
739#if ECB_GCC_VERSION(3,3)
740 #define ecb_restrict __restrict__
741#elif ECB_C99
742 #define ecb_restrict restrict
743#else
744 #define ecb_restrict
745#endif
746
747typedef int ecb_bool;
748
749#define ECB_CONCAT_(a, b) a ## b
750#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
751#define ECB_STRINGIFY_(a) # a
752#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
753
754#define ecb_function_ ecb_inline
755
756#if ECB_GCC_VERSION(3,1)
757 #define ecb_attribute(attrlist) __attribute__(attrlist)
758 #define ecb_is_constant(expr) __builtin_constant_p (expr)
759 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
760 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
761#else
762 #define ecb_attribute(attrlist)
763 #define ecb_is_constant(expr) 0
764 #define ecb_expect(expr,value) (expr)
765 #define ecb_prefetch(addr,rw,locality)
766#endif
767
768/* no emulation for ecb_decltype */
769#if ECB_GCC_VERSION(4,5)
770 #define ecb_decltype(x) __decltype(x)
771#elif ECB_GCC_VERSION(3,0)
772 #define ecb_decltype(x) __typeof(x)
773#endif
774
775#define ecb_noinline ecb_attribute ((__noinline__))
776#define ecb_unused ecb_attribute ((__unused__))
777#define ecb_const ecb_attribute ((__const__))
778#define ecb_pure ecb_attribute ((__pure__))
779
780#if ECB_C11
781 #define ecb_noreturn _Noreturn
782#else
783 #define ecb_noreturn ecb_attribute ((__noreturn__))
784#endif
785
786#if ECB_GCC_VERSION(4,3)
787 #define ecb_artificial ecb_attribute ((__artificial__))
788 #define ecb_hot ecb_attribute ((__hot__))
789 #define ecb_cold ecb_attribute ((__cold__))
790#else
791 #define ecb_artificial
792 #define ecb_hot
793 #define ecb_cold
794#endif
795
796/* put around conditional expressions if you are very sure that the */
797/* expression is mostly true or mostly false. note that these return */
798/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 799#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 800#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
801/* for compatibility to the rest of the world */
802#define ecb_likely(expr) ecb_expect_true (expr)
803#define ecb_unlikely(expr) ecb_expect_false (expr)
804
805/* count trailing zero bits and count # of one bits */
806#if ECB_GCC_VERSION(3,4)
807 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
808 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
809 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
810 #define ecb_ctz32(x) __builtin_ctz (x)
811 #define ecb_ctz64(x) __builtin_ctzll (x)
812 #define ecb_popcount32(x) __builtin_popcount (x)
813 /* no popcountll */
814#else
815 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
816 ecb_function_ int
817 ecb_ctz32 (uint32_t x)
818 {
819 int r = 0;
820
821 x &= ~x + 1; /* this isolates the lowest bit */
822
823#if ECB_branchless_on_i386
824 r += !!(x & 0xaaaaaaaa) << 0;
825 r += !!(x & 0xcccccccc) << 1;
826 r += !!(x & 0xf0f0f0f0) << 2;
827 r += !!(x & 0xff00ff00) << 3;
828 r += !!(x & 0xffff0000) << 4;
829#else
830 if (x & 0xaaaaaaaa) r += 1;
831 if (x & 0xcccccccc) r += 2;
832 if (x & 0xf0f0f0f0) r += 4;
833 if (x & 0xff00ff00) r += 8;
834 if (x & 0xffff0000) r += 16;
835#endif
836
837 return r;
838 }
839
840 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
841 ecb_function_ int
842 ecb_ctz64 (uint64_t x)
843 {
844 int shift = x & 0xffffffffU ? 0 : 32;
845 return ecb_ctz32 (x >> shift) + shift;
846 }
847
848 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
849 ecb_function_ int
850 ecb_popcount32 (uint32_t x)
851 {
852 x -= (x >> 1) & 0x55555555;
853 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
854 x = ((x >> 4) + x) & 0x0f0f0f0f;
855 x *= 0x01010101;
856
857 return x >> 24;
858 }
859
860 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
861 ecb_function_ int ecb_ld32 (uint32_t x)
862 {
863 int r = 0;
864
865 if (x >> 16) { x >>= 16; r += 16; }
866 if (x >> 8) { x >>= 8; r += 8; }
867 if (x >> 4) { x >>= 4; r += 4; }
868 if (x >> 2) { x >>= 2; r += 2; }
869 if (x >> 1) { r += 1; }
870
871 return r;
872 }
873
874 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
875 ecb_function_ int ecb_ld64 (uint64_t x)
876 {
877 int r = 0;
878
879 if (x >> 32) { x >>= 32; r += 32; }
880
881 return r + ecb_ld32 (x);
882 }
883#endif
884
885ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
886ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
887ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
888ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
889
890ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
891ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
892{
893 return ( (x * 0x0802U & 0x22110U)
894 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
895}
896
897ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
898ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
899{
900 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
901 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
902 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
903 x = ( x >> 8 ) | ( x << 8);
904
905 return x;
906}
907
908ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
909ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
910{
911 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
912 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
913 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
914 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
915 x = ( x >> 16 ) | ( x << 16);
916
917 return x;
918}
919
920/* popcount64 is only available on 64 bit cpus as gcc builtin */
921/* so for this version we are lazy */
922ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
923ecb_function_ int
924ecb_popcount64 (uint64_t x)
925{
926 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
927}
928
929ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
930ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
931ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
932ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
933ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
934ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
935ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
936ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
937
938ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
939ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
940ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
941ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
942ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
943ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
944ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
945ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
946
947#if ECB_GCC_VERSION(4,3)
948 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
949 #define ecb_bswap32(x) __builtin_bswap32 (x)
950 #define ecb_bswap64(x) __builtin_bswap64 (x)
951#else
952 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
953 ecb_function_ uint16_t
954 ecb_bswap16 (uint16_t x)
955 {
956 return ecb_rotl16 (x, 8);
957 }
958
959 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
960 ecb_function_ uint32_t
961 ecb_bswap32 (uint32_t x)
962 {
963 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
964 }
965
966 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
967 ecb_function_ uint64_t
968 ecb_bswap64 (uint64_t x)
969 {
970 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
971 }
972#endif
973
974#if ECB_GCC_VERSION(4,5)
975 #define ecb_unreachable() __builtin_unreachable ()
976#else
977 /* this seems to work fine, but gcc always emits a warning for it :/ */
978 ecb_inline void ecb_unreachable (void) ecb_noreturn;
979 ecb_inline void ecb_unreachable (void) { }
980#endif
981
982/* try to tell the compiler that some condition is definitely true */
983#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
984
985ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
986ecb_inline unsigned char
987ecb_byteorder_helper (void)
988{
989 /* the union code still generates code under pressure in gcc, */
990 /* but less than using pointers, and always seems to */
991 /* successfully return a constant. */
992 /* the reason why we have this horrible preprocessor mess */
993 /* is to avoid it in all cases, at least on common architectures */
994 /* or when using a recent enough gcc version (>= 4.6) */
995#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
996 return 0x44;
997#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
998 return 0x44;
999#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1000 return 0x11;
1001#else
1002 union
1003 {
1004 uint32_t i;
1005 uint8_t c;
1006 } u = { 0x11223344 };
1007 return u.c;
1008#endif
1009}
1010
1011ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1012ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1013ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1014ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1015
1016#if ECB_GCC_VERSION(3,0) || ECB_C99
1017 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1018#else
1019 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1020#endif
1021
1022#if __cplusplus
1023 template<typename T>
1024 static inline T ecb_div_rd (T val, T div)
1025 {
1026 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1027 }
1028 template<typename T>
1029 static inline T ecb_div_ru (T val, T div)
1030 {
1031 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1032 }
1033#else
1034 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1035 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1036#endif
1037
1038#if ecb_cplusplus_does_not_suck
1039 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1040 template<typename T, int N>
1041 static inline int ecb_array_length (const T (&arr)[N])
1042 {
1043 return N;
1044 }
1045#else
1046 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1047#endif
1048
1049/*******************************************************************************/
1050/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1051
1052/* basically, everything uses "ieee pure-endian" floating point numbers */
1053/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1054#if 0 \
1055 || __i386 || __i386__ \
1056 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1057 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1058 || defined __arm__ && defined __ARM_EABI__ \
1059 || defined __s390__ || defined __s390x__ \
1060 || defined __mips__ \
1061 || defined __alpha__ \
1062 || defined __hppa__ \
1063 || defined __ia64__ \
1064 || defined __m68k__ \
1065 || defined __m88k__ \
1066 || defined __sh__ \
1067 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1068 #define ECB_STDFP 1
1069 #include <string.h> /* for memcpy */
1070#else
1071 #define ECB_STDFP 0
1072#endif
1073
1074#ifndef ECB_NO_LIBM
1075
1076 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1077
1078 #ifdef NEN
1079 #define ECB_NAN NAN
1080 #else
1081 #define ECB_NAN INFINITY
1082 #endif
1083
1084 /* converts an ieee half/binary16 to a float */
1085 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1086 ecb_function_ float
1087 ecb_binary16_to_float (uint16_t x)
1088 {
1089 int e = (x >> 10) & 0x1f;
1090 int m = x & 0x3ff;
1091 float r;
1092
1093 if (!e ) r = ldexpf (m , -24);
1094 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1095 else if (m ) r = ECB_NAN;
1096 else r = INFINITY;
1097
1098 return x & 0x8000 ? -r : r;
1099 }
1100
1101 /* convert a float to ieee single/binary32 */
1102 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1103 ecb_function_ uint32_t
1104 ecb_float_to_binary32 (float x)
1105 {
1106 uint32_t r;
1107
1108 #if ECB_STDFP
1109 memcpy (&r, &x, 4);
1110 #else
1111 /* slow emulation, works for anything but -0 */
1112 uint32_t m;
1113 int e;
1114
1115 if (x == 0e0f ) return 0x00000000U;
1116 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1117 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1118 if (x != x ) return 0x7fbfffffU;
1119
1120 m = frexpf (x, &e) * 0x1000000U;
1121
1122 r = m & 0x80000000U;
1123
1124 if (r)
1125 m = -m;
1126
1127 if (e <= -126)
1128 {
1129 m &= 0xffffffU;
1130 m >>= (-125 - e);
1131 e = -126;
1132 }
1133
1134 r |= (e + 126) << 23;
1135 r |= m & 0x7fffffU;
1136 #endif
1137
1138 return r;
1139 }
1140
1141 /* converts an ieee single/binary32 to a float */
1142 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1143 ecb_function_ float
1144 ecb_binary32_to_float (uint32_t x)
1145 {
1146 float r;
1147
1148 #if ECB_STDFP
1149 memcpy (&r, &x, 4);
1150 #else
1151 /* emulation, only works for normals and subnormals and +0 */
1152 int neg = x >> 31;
1153 int e = (x >> 23) & 0xffU;
1154
1155 x &= 0x7fffffU;
1156
1157 if (e)
1158 x |= 0x800000U;
1159 else
1160 e = 1;
1161
1162 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1163 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1164
1165 r = neg ? -r : r;
1166 #endif
1167
1168 return r;
1169 }
1170
1171 /* convert a double to ieee double/binary64 */
1172 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1173 ecb_function_ uint64_t
1174 ecb_double_to_binary64 (double x)
1175 {
1176 uint64_t r;
1177
1178 #if ECB_STDFP
1179 memcpy (&r, &x, 8);
1180 #else
1181 /* slow emulation, works for anything but -0 */
1182 uint64_t m;
1183 int e;
1184
1185 if (x == 0e0 ) return 0x0000000000000000U;
1186 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1187 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1188 if (x != x ) return 0X7ff7ffffffffffffU;
1189
1190 m = frexp (x, &e) * 0x20000000000000U;
1191
1192 r = m & 0x8000000000000000;;
1193
1194 if (r)
1195 m = -m;
1196
1197 if (e <= -1022)
1198 {
1199 m &= 0x1fffffffffffffU;
1200 m >>= (-1021 - e);
1201 e = -1022;
1202 }
1203
1204 r |= ((uint64_t)(e + 1022)) << 52;
1205 r |= m & 0xfffffffffffffU;
1206 #endif
1207
1208 return r;
1209 }
1210
1211 /* converts an ieee double/binary64 to a double */
1212 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1213 ecb_function_ double
1214 ecb_binary64_to_double (uint64_t x)
1215 {
1216 double r;
1217
1218 #if ECB_STDFP
1219 memcpy (&r, &x, 8);
1220 #else
1221 /* emulation, only works for normals and subnormals and +0 */
1222 int neg = x >> 63;
1223 int e = (x >> 52) & 0x7ffU;
1224
1225 x &= 0xfffffffffffffU;
1226
1227 if (e)
1228 x |= 0x10000000000000U;
1229 else
1230 e = 1;
1231
1232 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1233 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1234
1235 r = neg ? -r : r;
1236 #endif
1237
1238 return r;
1239 }
1240
1241#endif
1242
1243#endif
1244
1245/* ECB.H END */
1246
1247#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1248/* if your architecture doesn't need memory fences, e.g. because it is
1249 * single-cpu/core, or if you use libev in a project that doesn't use libev
1250 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1251 * libev, in which cases the memory fences become nops.
1252 * alternatively, you can remove this #error and link against libpthread,
1253 * which will then provide the memory fences.
1254 */
1255# error "memory fences not defined for your architecture, please report"
1256#endif
1257
1258#ifndef ECB_MEMORY_FENCE
1259# define ECB_MEMORY_FENCE do { } while (0)
1260# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1261# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1262#endif
1263
1264#define expect_false(cond) ecb_expect_false (cond)
1265#define expect_true(cond) ecb_expect_true (cond)
1266#define noinline ecb_noinline
1267
476#define inline_size static inline 1268#define inline_size ecb_inline
477 1269
478#if EV_FEATURE_CODE 1270#if EV_FEATURE_CODE
479# define inline_speed static inline 1271# define inline_speed ecb_inline
480#else 1272#else
481# define inline_speed static noinline 1273# define inline_speed static noinline
482#endif 1274#endif
483 1275
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1276#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
523# include "ev_win32.c" 1315# include "ev_win32.c"
524#endif 1316#endif
525 1317
526/*****************************************************************************/ 1318/*****************************************************************************/
527 1319
1320/* define a suitable floor function (only used by periodics atm) */
1321
1322#if EV_USE_FLOOR
1323# include <math.h>
1324# define ev_floor(v) floor (v)
1325#else
1326
1327#include <float.h>
1328
1329/* a floor() replacement function, should be independent of ev_tstamp type */
1330static ev_tstamp noinline
1331ev_floor (ev_tstamp v)
1332{
1333 /* the choice of shift factor is not terribly important */
1334#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1335 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1336#else
1337 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1338#endif
1339
1340 /* argument too large for an unsigned long? */
1341 if (expect_false (v >= shift))
1342 {
1343 ev_tstamp f;
1344
1345 if (v == v - 1.)
1346 return v; /* very large number */
1347
1348 f = shift * ev_floor (v * (1. / shift));
1349 return f + ev_floor (v - f);
1350 }
1351
1352 /* special treatment for negative args? */
1353 if (expect_false (v < 0.))
1354 {
1355 ev_tstamp f = -ev_floor (-v);
1356
1357 return f - (f == v ? 0 : 1);
1358 }
1359
1360 /* fits into an unsigned long */
1361 return (unsigned long)v;
1362}
1363
1364#endif
1365
1366/*****************************************************************************/
1367
528#ifdef __linux 1368#ifdef __linux
529# include <sys/utsname.h> 1369# include <sys/utsname.h>
530#endif 1370#endif
531 1371
532static unsigned int noinline 1372static unsigned int noinline ecb_cold
533ev_linux_version (void) 1373ev_linux_version (void)
534{ 1374{
535#ifdef __linux 1375#ifdef __linux
536 unsigned int v = 0; 1376 unsigned int v = 0;
537 struct utsname buf; 1377 struct utsname buf;
… …
566} 1406}
567 1407
568/*****************************************************************************/ 1408/*****************************************************************************/
569 1409
570#if EV_AVOID_STDIO 1410#if EV_AVOID_STDIO
571static void noinline 1411static void noinline ecb_cold
572ev_printerr (const char *msg) 1412ev_printerr (const char *msg)
573{ 1413{
574 write (STDERR_FILENO, msg, strlen (msg)); 1414 write (STDERR_FILENO, msg, strlen (msg));
575} 1415}
576#endif 1416#endif
577 1417
578static void (*syserr_cb)(const char *msg); 1418static void (*syserr_cb)(const char *msg) EV_THROW;
579 1419
580void 1420void ecb_cold
581ev_set_syserr_cb (void (*cb)(const char *msg)) 1421ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
582{ 1422{
583 syserr_cb = cb; 1423 syserr_cb = cb;
584} 1424}
585 1425
586static void noinline 1426static void noinline ecb_cold
587ev_syserr (const char *msg) 1427ev_syserr (const char *msg)
588{ 1428{
589 if (!msg) 1429 if (!msg)
590 msg = "(libev) system error"; 1430 msg = "(libev) system error";
591 1431
… …
604 abort (); 1444 abort ();
605 } 1445 }
606} 1446}
607 1447
608static void * 1448static void *
609ev_realloc_emul (void *ptr, long size) 1449ev_realloc_emul (void *ptr, long size) EV_THROW
610{ 1450{
611#if __GLIBC__
612 return realloc (ptr, size);
613#else
614 /* some systems, notably openbsd and darwin, fail to properly 1451 /* some systems, notably openbsd and darwin, fail to properly
615 * implement realloc (x, 0) (as required by both ansi c-89 and 1452 * implement realloc (x, 0) (as required by both ansi c-89 and
616 * the single unix specification, so work around them here. 1453 * the single unix specification, so work around them here.
1454 * recently, also (at least) fedora and debian started breaking it,
1455 * despite documenting it otherwise.
617 */ 1456 */
618 1457
619 if (size) 1458 if (size)
620 return realloc (ptr, size); 1459 return realloc (ptr, size);
621 1460
622 free (ptr); 1461 free (ptr);
623 return 0; 1462 return 0;
624#endif
625} 1463}
626 1464
627static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1465static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
628 1466
629void 1467void ecb_cold
630ev_set_allocator (void *(*cb)(void *ptr, long size)) 1468ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
631{ 1469{
632 alloc = cb; 1470 alloc = cb;
633} 1471}
634 1472
635inline_speed void * 1473inline_speed void *
… …
723 #undef VAR 1561 #undef VAR
724 }; 1562 };
725 #include "ev_wrap.h" 1563 #include "ev_wrap.h"
726 1564
727 static struct ev_loop default_loop_struct; 1565 static struct ev_loop default_loop_struct;
728 struct ev_loop *ev_default_loop_ptr; 1566 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
729 1567
730#else 1568#else
731 1569
732 ev_tstamp ev_rt_now; 1570 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; 1571 #define VAR(name,decl) static decl;
734 #include "ev_vars.h" 1572 #include "ev_vars.h"
735 #undef VAR 1573 #undef VAR
736 1574
737 static int ev_default_loop_ptr; 1575 static int ev_default_loop_ptr;
… …
752 1590
753/*****************************************************************************/ 1591/*****************************************************************************/
754 1592
755#ifndef EV_HAVE_EV_TIME 1593#ifndef EV_HAVE_EV_TIME
756ev_tstamp 1594ev_tstamp
757ev_time (void) 1595ev_time (void) EV_THROW
758{ 1596{
759#if EV_USE_REALTIME 1597#if EV_USE_REALTIME
760 if (expect_true (have_realtime)) 1598 if (expect_true (have_realtime))
761 { 1599 {
762 struct timespec ts; 1600 struct timespec ts;
… …
786 return ev_time (); 1624 return ev_time ();
787} 1625}
788 1626
789#if EV_MULTIPLICITY 1627#if EV_MULTIPLICITY
790ev_tstamp 1628ev_tstamp
791ev_now (EV_P) 1629ev_now (EV_P) EV_THROW
792{ 1630{
793 return ev_rt_now; 1631 return ev_rt_now;
794} 1632}
795#endif 1633#endif
796 1634
797void 1635void
798ev_sleep (ev_tstamp delay) 1636ev_sleep (ev_tstamp delay) EV_THROW
799{ 1637{
800 if (delay > 0.) 1638 if (delay > 0.)
801 { 1639 {
802#if EV_USE_NANOSLEEP 1640#if EV_USE_NANOSLEEP
803 struct timespec ts; 1641 struct timespec ts;
804 1642
805 EV_TS_SET (ts, delay); 1643 EV_TS_SET (ts, delay);
806 nanosleep (&ts, 0); 1644 nanosleep (&ts, 0);
807#elif defined(_WIN32) 1645#elif defined _WIN32
808 Sleep ((unsigned long)(delay * 1e3)); 1646 Sleep ((unsigned long)(delay * 1e3));
809#else 1647#else
810 struct timeval tv; 1648 struct timeval tv;
811 1649
812 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1650 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
816 select (0, 0, 0, 0, &tv); 1654 select (0, 0, 0, 0, &tv);
817#endif 1655#endif
818 } 1656 }
819} 1657}
820 1658
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/*****************************************************************************/ 1659/*****************************************************************************/
830 1660
831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1661#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
832 1662
833/* find a suitable new size for the given array, */ 1663/* find a suitable new size for the given array, */
… …
839 1669
840 do 1670 do
841 ncur <<= 1; 1671 ncur <<= 1;
842 while (cnt > ncur); 1672 while (cnt > ncur);
843 1673
844 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1674 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1675 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
846 { 1676 {
847 ncur *= elem; 1677 ncur *= elem;
848 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1678 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
849 ncur = ncur - sizeof (void *) * 4; 1679 ncur = ncur - sizeof (void *) * 4;
… …
851 } 1681 }
852 1682
853 return ncur; 1683 return ncur;
854} 1684}
855 1685
856static noinline void * 1686static void * noinline ecb_cold
857array_realloc (int elem, void *base, int *cur, int cnt) 1687array_realloc (int elem, void *base, int *cur, int cnt)
858{ 1688{
859 *cur = array_nextsize (elem, *cur, cnt); 1689 *cur = array_nextsize (elem, *cur, cnt);
860 return ev_realloc (base, elem * *cur); 1690 return ev_realloc (base, elem * *cur);
861} 1691}
… …
864 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1694 memset ((void *)(base), 0, sizeof (*(base)) * (count))
865 1695
866#define array_needsize(type,base,cur,cnt,init) \ 1696#define array_needsize(type,base,cur,cnt,init) \
867 if (expect_false ((cnt) > (cur))) \ 1697 if (expect_false ((cnt) > (cur))) \
868 { \ 1698 { \
869 int ocur_ = (cur); \ 1699 int ecb_unused ocur_ = (cur); \
870 (base) = (type *)array_realloc \ 1700 (base) = (type *)array_realloc \
871 (sizeof (type), (base), &(cur), (cnt)); \ 1701 (sizeof (type), (base), &(cur), (cnt)); \
872 init ((base) + (ocur_), (cur) - ocur_); \ 1702 init ((base) + (ocur_), (cur) - ocur_); \
873 } 1703 }
874 1704
… …
892pendingcb (EV_P_ ev_prepare *w, int revents) 1722pendingcb (EV_P_ ev_prepare *w, int revents)
893{ 1723{
894} 1724}
895 1725
896void noinline 1726void noinline
897ev_feed_event (EV_P_ void *w, int revents) 1727ev_feed_event (EV_P_ void *w, int revents) EV_THROW
898{ 1728{
899 W w_ = (W)w; 1729 W w_ = (W)w;
900 int pri = ABSPRI (w_); 1730 int pri = ABSPRI (w_);
901 1731
902 if (expect_false (w_->pending)) 1732 if (expect_false (w_->pending))
… …
906 w_->pending = ++pendingcnt [pri]; 1736 w_->pending = ++pendingcnt [pri];
907 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1737 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
908 pendings [pri][w_->pending - 1].w = w_; 1738 pendings [pri][w_->pending - 1].w = w_;
909 pendings [pri][w_->pending - 1].events = revents; 1739 pendings [pri][w_->pending - 1].events = revents;
910 } 1740 }
1741
1742 pendingpri = NUMPRI - 1;
911} 1743}
912 1744
913inline_speed void 1745inline_speed void
914feed_reverse (EV_P_ W w) 1746feed_reverse (EV_P_ W w)
915{ 1747{
… …
961 if (expect_true (!anfd->reify)) 1793 if (expect_true (!anfd->reify))
962 fd_event_nocheck (EV_A_ fd, revents); 1794 fd_event_nocheck (EV_A_ fd, revents);
963} 1795}
964 1796
965void 1797void
966ev_feed_fd_event (EV_P_ int fd, int revents) 1798ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
967{ 1799{
968 if (fd >= 0 && fd < anfdmax) 1800 if (fd >= 0 && fd < anfdmax)
969 fd_event_nocheck (EV_A_ fd, revents); 1801 fd_event_nocheck (EV_A_ fd, revents);
970} 1802}
971 1803
… …
974inline_size void 1806inline_size void
975fd_reify (EV_P) 1807fd_reify (EV_P)
976{ 1808{
977 int i; 1809 int i;
978 1810
1811#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1812 for (i = 0; i < fdchangecnt; ++i)
1813 {
1814 int fd = fdchanges [i];
1815 ANFD *anfd = anfds + fd;
1816
1817 if (anfd->reify & EV__IOFDSET && anfd->head)
1818 {
1819 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1820
1821 if (handle != anfd->handle)
1822 {
1823 unsigned long arg;
1824
1825 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1826
1827 /* handle changed, but fd didn't - we need to do it in two steps */
1828 backend_modify (EV_A_ fd, anfd->events, 0);
1829 anfd->events = 0;
1830 anfd->handle = handle;
1831 }
1832 }
1833 }
1834#endif
1835
979 for (i = 0; i < fdchangecnt; ++i) 1836 for (i = 0; i < fdchangecnt; ++i)
980 { 1837 {
981 int fd = fdchanges [i]; 1838 int fd = fdchanges [i];
982 ANFD *anfd = anfds + fd; 1839 ANFD *anfd = anfds + fd;
983 ev_io *w; 1840 ev_io *w;
… …
985 unsigned char o_events = anfd->events; 1842 unsigned char o_events = anfd->events;
986 unsigned char o_reify = anfd->reify; 1843 unsigned char o_reify = anfd->reify;
987 1844
988 anfd->reify = 0; 1845 anfd->reify = 0;
989 1846
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 */ 1847 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1001 { 1848 {
1002 anfd->events = 0; 1849 anfd->events = 0;
1003 1850
1004 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1851 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1029 fdchanges [fdchangecnt - 1] = fd; 1876 fdchanges [fdchangecnt - 1] = fd;
1030 } 1877 }
1031} 1878}
1032 1879
1033/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1880/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034inline_speed void 1881inline_speed void ecb_cold
1035fd_kill (EV_P_ int fd) 1882fd_kill (EV_P_ int fd)
1036{ 1883{
1037 ev_io *w; 1884 ev_io *w;
1038 1885
1039 while ((w = (ev_io *)anfds [fd].head)) 1886 while ((w = (ev_io *)anfds [fd].head))
… …
1042 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1889 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1043 } 1890 }
1044} 1891}
1045 1892
1046/* check whether the given fd is actually valid, for error recovery */ 1893/* check whether the given fd is actually valid, for error recovery */
1047inline_size int 1894inline_size int ecb_cold
1048fd_valid (int fd) 1895fd_valid (int fd)
1049{ 1896{
1050#ifdef _WIN32 1897#ifdef _WIN32
1051 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1898 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052#else 1899#else
1053 return fcntl (fd, F_GETFD) != -1; 1900 return fcntl (fd, F_GETFD) != -1;
1054#endif 1901#endif
1055} 1902}
1056 1903
1057/* called on EBADF to verify fds */ 1904/* called on EBADF to verify fds */
1058static void noinline 1905static void noinline ecb_cold
1059fd_ebadf (EV_P) 1906fd_ebadf (EV_P)
1060{ 1907{
1061 int fd; 1908 int fd;
1062 1909
1063 for (fd = 0; fd < anfdmax; ++fd) 1910 for (fd = 0; fd < anfdmax; ++fd)
… …
1065 if (!fd_valid (fd) && errno == EBADF) 1912 if (!fd_valid (fd) && errno == EBADF)
1066 fd_kill (EV_A_ fd); 1913 fd_kill (EV_A_ fd);
1067} 1914}
1068 1915
1069/* called on ENOMEM in select/poll to kill some fds and retry */ 1916/* called on ENOMEM in select/poll to kill some fds and retry */
1070static void noinline 1917static void noinline ecb_cold
1071fd_enomem (EV_P) 1918fd_enomem (EV_P)
1072{ 1919{
1073 int fd; 1920 int fd;
1074 1921
1075 for (fd = anfdmax; fd--; ) 1922 for (fd = anfdmax; fd--; )
… …
1270 2117
1271/*****************************************************************************/ 2118/*****************************************************************************/
1272 2119
1273#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2120#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1274 2121
1275static void noinline 2122static void noinline ecb_cold
1276evpipe_init (EV_P) 2123evpipe_init (EV_P)
1277{ 2124{
1278 if (!ev_is_active (&pipe_w)) 2125 if (!ev_is_active (&pipe_w))
1279 { 2126 {
2127 int fds [2];
2128
1280# if EV_USE_EVENTFD 2129# if EV_USE_EVENTFD
2130 fds [0] = -1;
1281 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2131 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1282 if (evfd < 0 && errno == EINVAL) 2132 if (fds [1] < 0 && errno == EINVAL)
1283 evfd = eventfd (0, 0); 2133 fds [1] = eventfd (0, 0);
1284 2134
1285 if (evfd >= 0) 2135 if (fds [1] < 0)
2136# endif
1286 { 2137 {
2138 while (pipe (fds))
2139 ev_syserr ("(libev) error creating signal/async pipe");
2140
2141 fd_intern (fds [0]);
2142 }
2143
1287 evpipe [0] = -1; 2144 evpipe [0] = fds [0];
1288 fd_intern (evfd); /* doing it twice doesn't hurt */ 2145
1289 ev_io_set (&pipe_w, evfd, EV_READ); 2146 if (evpipe [1] < 0)
2147 evpipe [1] = fds [1]; /* first call, set write fd */
2148 else
2149 {
2150 /* on subsequent calls, do not change evpipe [1] */
2151 /* so that evpipe_write can always rely on its value. */
2152 /* this branch does not do anything sensible on windows, */
2153 /* so must not be executed on windows */
2154
2155 dup2 (fds [1], evpipe [1]);
2156 close (fds [1]);
2157 }
2158
2159 fd_intern (evpipe [1]);
2160
2161 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2162 ev_io_start (EV_A_ &pipe_w);
2163 ev_unref (EV_A); /* watcher should not keep loop alive */
2164 }
2165}
2166
2167inline_speed void
2168evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2169{
2170 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2171
2172 if (expect_true (*flag))
2173 return;
2174
2175 *flag = 1;
2176 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2177
2178 pipe_write_skipped = 1;
2179
2180 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2181
2182 if (pipe_write_wanted)
2183 {
2184 int old_errno;
2185
2186 pipe_write_skipped = 0;
2187 ECB_MEMORY_FENCE_RELEASE;
2188
2189 old_errno = errno; /* save errno because write will clobber it */
2190
2191#if EV_USE_EVENTFD
2192 if (evpipe [0] < 0)
2193 {
2194 uint64_t counter = 1;
2195 write (evpipe [1], &counter, sizeof (uint64_t));
1290 } 2196 }
1291 else 2197 else
1292# endif 2198#endif
1293 { 2199 {
1294 while (pipe (evpipe)) 2200#ifdef _WIN32
1295 ev_syserr ("(libev) error creating signal/async pipe"); 2201 WSABUF buf;
1296 2202 DWORD sent;
1297 fd_intern (evpipe [0]); 2203 buf.buf = &buf;
1298 fd_intern (evpipe [1]); 2204 buf.len = 1;
1299 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2205 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2206#else
2207 write (evpipe [1], &(evpipe [1]), 1);
2208#endif
1300 } 2209 }
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 2210
1332 errno = old_errno; 2211 errno = old_errno;
1333 } 2212 }
1334} 2213}
1335 2214
… …
1338static void 2217static void
1339pipecb (EV_P_ ev_io *iow, int revents) 2218pipecb (EV_P_ ev_io *iow, int revents)
1340{ 2219{
1341 int i; 2220 int i;
1342 2221
2222 if (revents & EV_READ)
2223 {
1343#if EV_USE_EVENTFD 2224#if EV_USE_EVENTFD
1344 if (evfd >= 0) 2225 if (evpipe [0] < 0)
1345 { 2226 {
1346 uint64_t counter; 2227 uint64_t counter;
1347 read (evfd, &counter, sizeof (uint64_t)); 2228 read (evpipe [1], &counter, sizeof (uint64_t));
1348 } 2229 }
1349 else 2230 else
1350#endif 2231#endif
1351 { 2232 {
1352 char dummy; 2233 char dummy[4];
1353 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2234#ifdef _WIN32
2235 WSABUF buf;
2236 DWORD recvd;
2237 DWORD flags = 0;
2238 buf.buf = dummy;
2239 buf.len = sizeof (dummy);
2240 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2241#else
1354 read (evpipe [0], &dummy, 1); 2242 read (evpipe [0], &dummy, sizeof (dummy));
2243#endif
2244 }
1355 } 2245 }
2246
2247 pipe_write_skipped = 0;
2248
2249 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1356 2250
1357#if EV_SIGNAL_ENABLE 2251#if EV_SIGNAL_ENABLE
1358 if (sig_pending) 2252 if (sig_pending)
1359 { 2253 {
1360 sig_pending = 0; 2254 sig_pending = 0;
2255
2256 ECB_MEMORY_FENCE;
1361 2257
1362 for (i = EV_NSIG - 1; i--; ) 2258 for (i = EV_NSIG - 1; i--; )
1363 if (expect_false (signals [i].pending)) 2259 if (expect_false (signals [i].pending))
1364 ev_feed_signal_event (EV_A_ i + 1); 2260 ev_feed_signal_event (EV_A_ i + 1);
1365 } 2261 }
… …
1367 2263
1368#if EV_ASYNC_ENABLE 2264#if EV_ASYNC_ENABLE
1369 if (async_pending) 2265 if (async_pending)
1370 { 2266 {
1371 async_pending = 0; 2267 async_pending = 0;
2268
2269 ECB_MEMORY_FENCE;
1372 2270
1373 for (i = asynccnt; i--; ) 2271 for (i = asynccnt; i--; )
1374 if (asyncs [i]->sent) 2272 if (asyncs [i]->sent)
1375 { 2273 {
1376 asyncs [i]->sent = 0; 2274 asyncs [i]->sent = 0;
2275 ECB_MEMORY_FENCE_RELEASE;
1377 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2276 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1378 } 2277 }
1379 } 2278 }
1380#endif 2279#endif
1381} 2280}
1382 2281
1383/*****************************************************************************/ 2282/*****************************************************************************/
1384 2283
1385void 2284void
1386ev_feed_signal (int signum) 2285ev_feed_signal (int signum) EV_THROW
1387{ 2286{
1388#if EV_MULTIPLICITY 2287#if EV_MULTIPLICITY
2288 EV_P;
2289 ECB_MEMORY_FENCE_ACQUIRE;
1389 EV_P = signals [signum - 1].loop; 2290 EV_A = signals [signum - 1].loop;
1390 2291
1391 if (!EV_A) 2292 if (!EV_A)
1392 return; 2293 return;
1393#endif 2294#endif
1394 2295
… …
1405 2306
1406 ev_feed_signal (signum); 2307 ev_feed_signal (signum);
1407} 2308}
1408 2309
1409void noinline 2310void noinline
1410ev_feed_signal_event (EV_P_ int signum) 2311ev_feed_signal_event (EV_P_ int signum) EV_THROW
1411{ 2312{
1412 WL w; 2313 WL w;
1413 2314
1414 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2315 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1415 return; 2316 return;
1416 2317
1417 --signum; 2318 --signum;
1418 2319
1419#if EV_MULTIPLICITY 2320#if EV_MULTIPLICITY
… …
1423 if (expect_false (signals [signum].loop != EV_A)) 2324 if (expect_false (signals [signum].loop != EV_A))
1424 return; 2325 return;
1425#endif 2326#endif
1426 2327
1427 signals [signum].pending = 0; 2328 signals [signum].pending = 0;
2329 ECB_MEMORY_FENCE_RELEASE;
1428 2330
1429 for (w = signals [signum].head; w; w = w->next) 2331 for (w = signals [signum].head; w; w = w->next)
1430 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2332 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1431} 2333}
1432 2334
… …
1530#endif 2432#endif
1531#if EV_USE_SELECT 2433#if EV_USE_SELECT
1532# include "ev_select.c" 2434# include "ev_select.c"
1533#endif 2435#endif
1534 2436
1535int 2437int ecb_cold
1536ev_version_major (void) 2438ev_version_major (void) EV_THROW
1537{ 2439{
1538 return EV_VERSION_MAJOR; 2440 return EV_VERSION_MAJOR;
1539} 2441}
1540 2442
1541int 2443int ecb_cold
1542ev_version_minor (void) 2444ev_version_minor (void) EV_THROW
1543{ 2445{
1544 return EV_VERSION_MINOR; 2446 return EV_VERSION_MINOR;
1545} 2447}
1546 2448
1547/* return true if we are running with elevated privileges and should ignore env variables */ 2449/* return true if we are running with elevated privileges and should ignore env variables */
1548int inline_size 2450int inline_size ecb_cold
1549enable_secure (void) 2451enable_secure (void)
1550{ 2452{
1551#ifdef _WIN32 2453#ifdef _WIN32
1552 return 0; 2454 return 0;
1553#else 2455#else
1554 return getuid () != geteuid () 2456 return getuid () != geteuid ()
1555 || getgid () != getegid (); 2457 || getgid () != getegid ();
1556#endif 2458#endif
1557} 2459}
1558 2460
1559unsigned int 2461unsigned int ecb_cold
1560ev_supported_backends (void) 2462ev_supported_backends (void) EV_THROW
1561{ 2463{
1562 unsigned int flags = 0; 2464 unsigned int flags = 0;
1563 2465
1564 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2466 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1565 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2467 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1568 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2470 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1569 2471
1570 return flags; 2472 return flags;
1571} 2473}
1572 2474
1573unsigned int 2475unsigned int ecb_cold
1574ev_recommended_backends (void) 2476ev_recommended_backends (void) EV_THROW
1575{ 2477{
1576 unsigned int flags = ev_supported_backends (); 2478 unsigned int flags = ev_supported_backends ();
1577 2479
1578#ifndef __NetBSD__ 2480#ifndef __NetBSD__
1579 /* kqueue is borked on everything but netbsd apparently */ 2481 /* kqueue is borked on everything but netbsd apparently */
… …
1590#endif 2492#endif
1591 2493
1592 return flags; 2494 return flags;
1593} 2495}
1594 2496
1595unsigned int 2497unsigned int ecb_cold
1596ev_embeddable_backends (void) 2498ev_embeddable_backends (void) EV_THROW
1597{ 2499{
1598 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2500 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1599 2501
1600 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2502 /* 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 */ 2503 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1603 2505
1604 return flags; 2506 return flags;
1605} 2507}
1606 2508
1607unsigned int 2509unsigned int
1608ev_backend (EV_P) 2510ev_backend (EV_P) EV_THROW
1609{ 2511{
1610 return backend; 2512 return backend;
1611} 2513}
1612 2514
1613#if EV_FEATURE_API 2515#if EV_FEATURE_API
1614unsigned int 2516unsigned int
1615ev_iteration (EV_P) 2517ev_iteration (EV_P) EV_THROW
1616{ 2518{
1617 return loop_count; 2519 return loop_count;
1618} 2520}
1619 2521
1620unsigned int 2522unsigned int
1621ev_depth (EV_P) 2523ev_depth (EV_P) EV_THROW
1622{ 2524{
1623 return loop_depth; 2525 return loop_depth;
1624} 2526}
1625 2527
1626void 2528void
1627ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2529ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1628{ 2530{
1629 io_blocktime = interval; 2531 io_blocktime = interval;
1630} 2532}
1631 2533
1632void 2534void
1633ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2535ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1634{ 2536{
1635 timeout_blocktime = interval; 2537 timeout_blocktime = interval;
1636} 2538}
1637 2539
1638void 2540void
1639ev_set_userdata (EV_P_ void *data) 2541ev_set_userdata (EV_P_ void *data) EV_THROW
1640{ 2542{
1641 userdata = data; 2543 userdata = data;
1642} 2544}
1643 2545
1644void * 2546void *
1645ev_userdata (EV_P) 2547ev_userdata (EV_P) EV_THROW
1646{ 2548{
1647 return userdata; 2549 return userdata;
1648} 2550}
1649 2551
2552void
1650void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2553ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1651{ 2554{
1652 invoke_cb = invoke_pending_cb; 2555 invoke_cb = invoke_pending_cb;
1653} 2556}
1654 2557
2558void
1655void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2559ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1656{ 2560{
1657 release_cb = release; 2561 release_cb = release;
1658 acquire_cb = acquire; 2562 acquire_cb = acquire;
1659} 2563}
1660#endif 2564#endif
1661 2565
1662/* initialise a loop structure, must be zero-initialised */ 2566/* initialise a loop structure, must be zero-initialised */
1663static void noinline 2567static void noinline ecb_cold
1664loop_init (EV_P_ unsigned int flags) 2568loop_init (EV_P_ unsigned int flags) EV_THROW
1665{ 2569{
1666 if (!backend) 2570 if (!backend)
1667 { 2571 {
1668 origflags = flags; 2572 origflags = flags;
1669 2573
… …
1696 if (!(flags & EVFLAG_NOENV) 2600 if (!(flags & EVFLAG_NOENV)
1697 && !enable_secure () 2601 && !enable_secure ()
1698 && getenv ("LIBEV_FLAGS")) 2602 && getenv ("LIBEV_FLAGS"))
1699 flags = atoi (getenv ("LIBEV_FLAGS")); 2603 flags = atoi (getenv ("LIBEV_FLAGS"));
1700 2604
1701 ev_rt_now = ev_time (); 2605 ev_rt_now = ev_time ();
1702 mn_now = get_clock (); 2606 mn_now = get_clock ();
1703 now_floor = mn_now; 2607 now_floor = mn_now;
1704 rtmn_diff = ev_rt_now - mn_now; 2608 rtmn_diff = ev_rt_now - mn_now;
1705#if EV_FEATURE_API 2609#if EV_FEATURE_API
1706 invoke_cb = ev_invoke_pending; 2610 invoke_cb = ev_invoke_pending;
1707#endif 2611#endif
1708 2612
1709 io_blocktime = 0.; 2613 io_blocktime = 0.;
1710 timeout_blocktime = 0.; 2614 timeout_blocktime = 0.;
1711 backend = 0; 2615 backend = 0;
1712 backend_fd = -1; 2616 backend_fd = -1;
1713 sig_pending = 0; 2617 sig_pending = 0;
1714#if EV_ASYNC_ENABLE 2618#if EV_ASYNC_ENABLE
1715 async_pending = 0; 2619 async_pending = 0;
1716#endif 2620#endif
2621 pipe_write_skipped = 0;
2622 pipe_write_wanted = 0;
2623 evpipe [0] = -1;
2624 evpipe [1] = -1;
1717#if EV_USE_INOTIFY 2625#if EV_USE_INOTIFY
1718 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2626 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719#endif 2627#endif
1720#if EV_USE_SIGNALFD 2628#if EV_USE_SIGNALFD
1721 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2629 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722#endif 2630#endif
1723 2631
1724 if (!(flags & EVBACKEND_MASK)) 2632 if (!(flags & EVBACKEND_MASK))
1725 flags |= ev_recommended_backends (); 2633 flags |= ev_recommended_backends ();
1726 2634
… …
1751#endif 2659#endif
1752 } 2660 }
1753} 2661}
1754 2662
1755/* free up a loop structure */ 2663/* free up a loop structure */
1756void 2664void ecb_cold
1757ev_loop_destroy (EV_P) 2665ev_loop_destroy (EV_P)
1758{ 2666{
1759 int i; 2667 int i;
1760 2668
1761#if EV_MULTIPLICITY 2669#if EV_MULTIPLICITY
… …
1772 EV_INVOKE_PENDING; 2680 EV_INVOKE_PENDING;
1773 } 2681 }
1774#endif 2682#endif
1775 2683
1776#if EV_CHILD_ENABLE 2684#if EV_CHILD_ENABLE
1777 if (ev_is_active (&childev)) 2685 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1778 { 2686 {
1779 ev_ref (EV_A); /* child watcher */ 2687 ev_ref (EV_A); /* child watcher */
1780 ev_signal_stop (EV_A_ &childev); 2688 ev_signal_stop (EV_A_ &childev);
1781 } 2689 }
1782#endif 2690#endif
… …
1784 if (ev_is_active (&pipe_w)) 2692 if (ev_is_active (&pipe_w))
1785 { 2693 {
1786 /*ev_ref (EV_A);*/ 2694 /*ev_ref (EV_A);*/
1787 /*ev_io_stop (EV_A_ &pipe_w);*/ 2695 /*ev_io_stop (EV_A_ &pipe_w);*/
1788 2696
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]); 2697 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1797 EV_WIN32_CLOSE_FD (evpipe [1]); 2698 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1798 }
1799 } 2699 }
1800 2700
1801#if EV_USE_SIGNALFD 2701#if EV_USE_SIGNALFD
1802 if (ev_is_active (&sigfd_w)) 2702 if (ev_is_active (&sigfd_w))
1803 close (sigfd); 2703 close (sigfd);
… …
1889#endif 2789#endif
1890#if EV_USE_INOTIFY 2790#if EV_USE_INOTIFY
1891 infy_fork (EV_A); 2791 infy_fork (EV_A);
1892#endif 2792#endif
1893 2793
2794#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1894 if (ev_is_active (&pipe_w)) 2795 if (ev_is_active (&pipe_w))
1895 { 2796 {
1896 /* this "locks" the handlers against writing to the pipe */ 2797 /* 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 2798
1903 ev_ref (EV_A); 2799 ev_ref (EV_A);
1904 ev_io_stop (EV_A_ &pipe_w); 2800 ev_io_stop (EV_A_ &pipe_w);
1905 2801
1906#if EV_USE_EVENTFD
1907 if (evfd >= 0)
1908 close (evfd);
1909#endif
1910
1911 if (evpipe [0] >= 0) 2802 if (evpipe [0] >= 0)
1912 {
1913 EV_WIN32_CLOSE_FD (evpipe [0]); 2803 EV_WIN32_CLOSE_FD (evpipe [0]);
1914 EV_WIN32_CLOSE_FD (evpipe [1]);
1915 }
1916 2804
1917#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1918 evpipe_init (EV_A); 2805 evpipe_init (EV_A);
1919 /* now iterate over everything, in case we missed something */ 2806 /* iterate over everything, in case we missed something before */
1920 pipecb (EV_A_ &pipe_w, EV_READ); 2807 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1921#endif
1922 } 2808 }
2809#endif
1923 2810
1924 postfork = 0; 2811 postfork = 0;
1925} 2812}
1926 2813
1927#if EV_MULTIPLICITY 2814#if EV_MULTIPLICITY
1928 2815
1929struct ev_loop * 2816struct ev_loop * ecb_cold
1930ev_loop_new (unsigned int flags) 2817ev_loop_new (unsigned int flags) EV_THROW
1931{ 2818{
1932 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2819 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933 2820
1934 memset (EV_A, 0, sizeof (struct ev_loop)); 2821 memset (EV_A, 0, sizeof (struct ev_loop));
1935 loop_init (EV_A_ flags); 2822 loop_init (EV_A_ flags);
… …
1942} 2829}
1943 2830
1944#endif /* multiplicity */ 2831#endif /* multiplicity */
1945 2832
1946#if EV_VERIFY 2833#if EV_VERIFY
1947static void noinline 2834static void noinline ecb_cold
1948verify_watcher (EV_P_ W w) 2835verify_watcher (EV_P_ W w)
1949{ 2836{
1950 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2837 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951 2838
1952 if (w->pending) 2839 if (w->pending)
1953 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2840 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954} 2841}
1955 2842
1956static void noinline 2843static void noinline ecb_cold
1957verify_heap (EV_P_ ANHE *heap, int N) 2844verify_heap (EV_P_ ANHE *heap, int N)
1958{ 2845{
1959 int i; 2846 int i;
1960 2847
1961 for (i = HEAP0; i < N + HEAP0; ++i) 2848 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1966 2853
1967 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2854 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968 } 2855 }
1969} 2856}
1970 2857
1971static void noinline 2858static void noinline ecb_cold
1972array_verify (EV_P_ W *ws, int cnt) 2859array_verify (EV_P_ W *ws, int cnt)
1973{ 2860{
1974 while (cnt--) 2861 while (cnt--)
1975 { 2862 {
1976 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2863 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1978 } 2865 }
1979} 2866}
1980#endif 2867#endif
1981 2868
1982#if EV_FEATURE_API 2869#if EV_FEATURE_API
1983void 2870void ecb_cold
1984ev_verify (EV_P) 2871ev_verify (EV_P) EV_THROW
1985{ 2872{
1986#if EV_VERIFY 2873#if EV_VERIFY
1987 int i; 2874 int i;
1988 WL w; 2875 WL w, w2;
1989 2876
1990 assert (activecnt >= -1); 2877 assert (activecnt >= -1);
1991 2878
1992 assert (fdchangemax >= fdchangecnt); 2879 assert (fdchangemax >= fdchangecnt);
1993 for (i = 0; i < fdchangecnt; ++i) 2880 for (i = 0; i < fdchangecnt; ++i)
1994 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2881 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1995 2882
1996 assert (anfdmax >= 0); 2883 assert (anfdmax >= 0);
1997 for (i = 0; i < anfdmax; ++i) 2884 for (i = 0; i < anfdmax; ++i)
2885 {
2886 int j = 0;
2887
1998 for (w = anfds [i].head; w; w = w->next) 2888 for (w = w2 = anfds [i].head; w; w = w->next)
1999 { 2889 {
2000 verify_watcher (EV_A_ (W)w); 2890 verify_watcher (EV_A_ (W)w);
2891
2892 if (j++ & 1)
2893 {
2894 assert (("libev: io watcher list contains a loop", w != w2));
2895 w2 = w2->next;
2896 }
2897
2001 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2898 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)); 2899 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2003 } 2900 }
2901 }
2004 2902
2005 assert (timermax >= timercnt); 2903 assert (timermax >= timercnt);
2006 verify_heap (EV_A_ timers, timercnt); 2904 verify_heap (EV_A_ timers, timercnt);
2007 2905
2008#if EV_PERIODIC_ENABLE 2906#if EV_PERIODIC_ENABLE
… …
2054#endif 2952#endif
2055} 2953}
2056#endif 2954#endif
2057 2955
2058#if EV_MULTIPLICITY 2956#if EV_MULTIPLICITY
2059struct ev_loop * 2957struct ev_loop * ecb_cold
2060#else 2958#else
2061int 2959int
2062#endif 2960#endif
2063ev_default_loop (unsigned int flags) 2961ev_default_loop (unsigned int flags) EV_THROW
2064{ 2962{
2065 if (!ev_default_loop_ptr) 2963 if (!ev_default_loop_ptr)
2066 { 2964 {
2067#if EV_MULTIPLICITY 2965#if EV_MULTIPLICITY
2068 EV_P = ev_default_loop_ptr = &default_loop_struct; 2966 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2087 2985
2088 return ev_default_loop_ptr; 2986 return ev_default_loop_ptr;
2089} 2987}
2090 2988
2091void 2989void
2092ev_loop_fork (EV_P) 2990ev_loop_fork (EV_P) EV_THROW
2093{ 2991{
2094 postfork = 1; /* must be in line with ev_default_fork */ 2992 postfork = 1;
2095} 2993}
2096 2994
2097/*****************************************************************************/ 2995/*****************************************************************************/
2098 2996
2099void 2997void
… …
2101{ 2999{
2102 EV_CB_INVOKE ((W)w, revents); 3000 EV_CB_INVOKE ((W)w, revents);
2103} 3001}
2104 3002
2105unsigned int 3003unsigned int
2106ev_pending_count (EV_P) 3004ev_pending_count (EV_P) EV_THROW
2107{ 3005{
2108 int pri; 3006 int pri;
2109 unsigned int count = 0; 3007 unsigned int count = 0;
2110 3008
2111 for (pri = NUMPRI; pri--; ) 3009 for (pri = NUMPRI; pri--; )
… …
2115} 3013}
2116 3014
2117void noinline 3015void noinline
2118ev_invoke_pending (EV_P) 3016ev_invoke_pending (EV_P)
2119{ 3017{
2120 int pri; 3018 pendingpri = NUMPRI;
2121 3019
2122 for (pri = NUMPRI; pri--; ) 3020 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3021 {
3022 --pendingpri;
3023
2123 while (pendingcnt [pri]) 3024 while (pendingcnt [pendingpri])
2124 { 3025 {
2125 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3026 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2126 3027
2127 p->w->pending = 0; 3028 p->w->pending = 0;
2128 EV_CB_INVOKE (p->w, p->events); 3029 EV_CB_INVOKE (p->w, p->events);
2129 EV_FREQUENT_CHECK; 3030 EV_FREQUENT_CHECK;
2130 } 3031 }
3032 }
2131} 3033}
2132 3034
2133#if EV_IDLE_ENABLE 3035#if EV_IDLE_ENABLE
2134/* make idle watchers pending. this handles the "call-idle */ 3036/* make idle watchers pending. this handles the "call-idle */
2135/* only when higher priorities are idle" logic */ 3037/* only when higher priorities are idle" logic */
… …
2193 } 3095 }
2194} 3096}
2195 3097
2196#if EV_PERIODIC_ENABLE 3098#if EV_PERIODIC_ENABLE
2197 3099
2198inline_speed 3100static void noinline
2199periodic_recalc (EV_P_ ev_periodic *w) 3101periodic_recalc (EV_P_ ev_periodic *w)
2200{ 3102{
2201 /* TODO: use slow but potentially more correct incremental algo, */ 3103 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202 /* also do not rely on ceil */ 3104 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; 3105
3106 /* the above almost always errs on the low side */
3107 while (at <= ev_rt_now)
3108 {
3109 ev_tstamp nat = at + w->interval;
3110
3111 /* when resolution fails us, we use ev_rt_now */
3112 if (expect_false (nat == at))
3113 {
3114 at = ev_rt_now;
3115 break;
3116 }
3117
3118 at = nat;
3119 }
3120
3121 ev_at (w) = at;
2204} 3122}
2205 3123
2206/* make periodics pending */ 3124/* make periodics pending */
2207inline_size void 3125inline_size void
2208periodics_reify (EV_P) 3126periodics_reify (EV_P)
2209{ 3127{
2210 EV_FREQUENT_CHECK; 3128 EV_FREQUENT_CHECK;
2211 3129
2212 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3130 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2213 { 3131 {
2214 int feed_count = 0;
2215
2216 do 3132 do
2217 { 3133 {
2218 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3134 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2219 3135
2220 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3136 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2230 downheap (periodics, periodiccnt, HEAP0); 3146 downheap (periodics, periodiccnt, HEAP0);
2231 } 3147 }
2232 else if (w->interval) 3148 else if (w->interval)
2233 { 3149 {
2234 periodic_recalc (EV_A_ w); 3150 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]); 3151 ANHE_at_cache (periodics [HEAP0]);
2250 downheap (periodics, periodiccnt, HEAP0); 3152 downheap (periodics, periodiccnt, HEAP0);
2251 } 3153 }
2252 else 3154 else
2253 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3155 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2261 } 3163 }
2262} 3164}
2263 3165
2264/* simply recalculate all periodics */ 3166/* simply recalculate all periodics */
2265/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3167/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266static void noinline 3168static void noinline ecb_cold
2267periodics_reschedule (EV_P) 3169periodics_reschedule (EV_P)
2268{ 3170{
2269 int i; 3171 int i;
2270 3172
2271 /* adjust periodics after time jump */ 3173 /* adjust periodics after time jump */
… …
2284 reheap (periodics, periodiccnt); 3186 reheap (periodics, periodiccnt);
2285} 3187}
2286#endif 3188#endif
2287 3189
2288/* adjust all timers by a given offset */ 3190/* adjust all timers by a given offset */
2289static void noinline 3191static void noinline ecb_cold
2290timers_reschedule (EV_P_ ev_tstamp adjust) 3192timers_reschedule (EV_P_ ev_tstamp adjust)
2291{ 3193{
2292 int i; 3194 int i;
2293 3195
2294 for (i = 0; i < timercnt; ++i) 3196 for (i = 0; i < timercnt; ++i)
… …
2331 * doesn't hurt either as we only do this on time-jumps or 3233 * doesn't hurt either as we only do this on time-jumps or
2332 * in the unlikely event of having been preempted here. 3234 * in the unlikely event of having been preempted here.
2333 */ 3235 */
2334 for (i = 4; --i; ) 3236 for (i = 4; --i; )
2335 { 3237 {
3238 ev_tstamp diff;
2336 rtmn_diff = ev_rt_now - mn_now; 3239 rtmn_diff = ev_rt_now - mn_now;
2337 3240
3241 diff = odiff - rtmn_diff;
3242
2338 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3243 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2339 return; /* all is well */ 3244 return; /* all is well */
2340 3245
2341 ev_rt_now = ev_time (); 3246 ev_rt_now = ev_time ();
2342 mn_now = get_clock (); 3247 mn_now = get_clock ();
2343 now_floor = mn_now; 3248 now_floor = mn_now;
… …
2365 3270
2366 mn_now = ev_rt_now; 3271 mn_now = ev_rt_now;
2367 } 3272 }
2368} 3273}
2369 3274
2370void 3275int
2371ev_run (EV_P_ int flags) 3276ev_run (EV_P_ int flags)
2372{ 3277{
2373#if EV_FEATURE_API 3278#if EV_FEATURE_API
2374 ++loop_depth; 3279 ++loop_depth;
2375#endif 3280#endif
… …
2433 ev_tstamp prev_mn_now = mn_now; 3338 ev_tstamp prev_mn_now = mn_now;
2434 3339
2435 /* update time to cancel out callback processing overhead */ 3340 /* update time to cancel out callback processing overhead */
2436 time_update (EV_A_ 1e100); 3341 time_update (EV_A_ 1e100);
2437 3342
3343 /* from now on, we want a pipe-wake-up */
3344 pipe_write_wanted = 1;
3345
3346 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3347
2438 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3348 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2439 { 3349 {
2440 waittime = MAX_BLOCKTIME; 3350 waittime = MAX_BLOCKTIME;
2441 3351
2442 if (timercnt) 3352 if (timercnt)
2443 { 3353 {
2444 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3354 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445 if (waittime > to) waittime = to; 3355 if (waittime > to) waittime = to;
2446 } 3356 }
2447 3357
2448#if EV_PERIODIC_ENABLE 3358#if EV_PERIODIC_ENABLE
2449 if (periodiccnt) 3359 if (periodiccnt)
2450 { 3360 {
2451 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3361 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452 if (waittime > to) waittime = to; 3362 if (waittime > to) waittime = to;
2453 } 3363 }
2454#endif 3364#endif
2455 3365
2456 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3366 /* don't let timeouts decrease the waittime below timeout_blocktime */
2457 if (expect_false (waittime < timeout_blocktime)) 3367 if (expect_false (waittime < timeout_blocktime))
2458 waittime = timeout_blocktime; 3368 waittime = timeout_blocktime;
3369
3370 /* at this point, we NEED to wait, so we have to ensure */
3371 /* to pass a minimum nonzero value to the backend */
3372 if (expect_false (waittime < backend_mintime))
3373 waittime = backend_mintime;
2459 3374
2460 /* extra check because io_blocktime is commonly 0 */ 3375 /* extra check because io_blocktime is commonly 0 */
2461 if (expect_false (io_blocktime)) 3376 if (expect_false (io_blocktime))
2462 { 3377 {
2463 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3378 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464 3379
2465 if (sleeptime > waittime - backend_fudge) 3380 if (sleeptime > waittime - backend_mintime)
2466 sleeptime = waittime - backend_fudge; 3381 sleeptime = waittime - backend_mintime;
2467 3382
2468 if (expect_true (sleeptime > 0.)) 3383 if (expect_true (sleeptime > 0.))
2469 { 3384 {
2470 ev_sleep (sleeptime); 3385 ev_sleep (sleeptime);
2471 waittime -= sleeptime; 3386 waittime -= sleeptime;
… …
2478#endif 3393#endif
2479 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3394 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480 backend_poll (EV_A_ waittime); 3395 backend_poll (EV_A_ waittime);
2481 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3396 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2482 3397
3398 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3399
3400 ECB_MEMORY_FENCE_ACQUIRE;
3401 if (pipe_write_skipped)
3402 {
3403 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3404 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3405 }
3406
3407
2483 /* update ev_rt_now, do magic */ 3408 /* update ev_rt_now, do magic */
2484 time_update (EV_A_ waittime + sleeptime); 3409 time_update (EV_A_ waittime + sleeptime);
2485 } 3410 }
2486 3411
2487 /* queue pending timers and reschedule them */ 3412 /* queue pending timers and reschedule them */
… …
2513 loop_done = EVBREAK_CANCEL; 3438 loop_done = EVBREAK_CANCEL;
2514 3439
2515#if EV_FEATURE_API 3440#if EV_FEATURE_API
2516 --loop_depth; 3441 --loop_depth;
2517#endif 3442#endif
3443
3444 return activecnt;
2518} 3445}
2519 3446
2520void 3447void
2521ev_break (EV_P_ int how) 3448ev_break (EV_P_ int how) EV_THROW
2522{ 3449{
2523 loop_done = how; 3450 loop_done = how;
2524} 3451}
2525 3452
2526void 3453void
2527ev_ref (EV_P) 3454ev_ref (EV_P) EV_THROW
2528{ 3455{
2529 ++activecnt; 3456 ++activecnt;
2530} 3457}
2531 3458
2532void 3459void
2533ev_unref (EV_P) 3460ev_unref (EV_P) EV_THROW
2534{ 3461{
2535 --activecnt; 3462 --activecnt;
2536} 3463}
2537 3464
2538void 3465void
2539ev_now_update (EV_P) 3466ev_now_update (EV_P) EV_THROW
2540{ 3467{
2541 time_update (EV_A_ 1e100); 3468 time_update (EV_A_ 1e100);
2542} 3469}
2543 3470
2544void 3471void
2545ev_suspend (EV_P) 3472ev_suspend (EV_P) EV_THROW
2546{ 3473{
2547 ev_now_update (EV_A); 3474 ev_now_update (EV_A);
2548} 3475}
2549 3476
2550void 3477void
2551ev_resume (EV_P) 3478ev_resume (EV_P) EV_THROW
2552{ 3479{
2553 ev_tstamp mn_prev = mn_now; 3480 ev_tstamp mn_prev = mn_now;
2554 3481
2555 ev_now_update (EV_A); 3482 ev_now_update (EV_A);
2556 timers_reschedule (EV_A_ mn_now - mn_prev); 3483 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2595 w->pending = 0; 3522 w->pending = 0;
2596 } 3523 }
2597} 3524}
2598 3525
2599int 3526int
2600ev_clear_pending (EV_P_ void *w) 3527ev_clear_pending (EV_P_ void *w) EV_THROW
2601{ 3528{
2602 W w_ = (W)w; 3529 W w_ = (W)w;
2603 int pending = w_->pending; 3530 int pending = w_->pending;
2604 3531
2605 if (expect_true (pending)) 3532 if (expect_true (pending))
… …
2638} 3565}
2639 3566
2640/*****************************************************************************/ 3567/*****************************************************************************/
2641 3568
2642void noinline 3569void noinline
2643ev_io_start (EV_P_ ev_io *w) 3570ev_io_start (EV_P_ ev_io *w) EV_THROW
2644{ 3571{
2645 int fd = w->fd; 3572 int fd = w->fd;
2646 3573
2647 if (expect_false (ev_is_active (w))) 3574 if (expect_false (ev_is_active (w)))
2648 return; 3575 return;
… …
2654 3581
2655 ev_start (EV_A_ (W)w, 1); 3582 ev_start (EV_A_ (W)w, 1);
2656 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3583 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2657 wlist_add (&anfds[fd].head, (WL)w); 3584 wlist_add (&anfds[fd].head, (WL)w);
2658 3585
3586 /* common bug, apparently */
3587 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3588
2659 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3589 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2660 w->events &= ~EV__IOFDSET; 3590 w->events &= ~EV__IOFDSET;
2661 3591
2662 EV_FREQUENT_CHECK; 3592 EV_FREQUENT_CHECK;
2663} 3593}
2664 3594
2665void noinline 3595void noinline
2666ev_io_stop (EV_P_ ev_io *w) 3596ev_io_stop (EV_P_ ev_io *w) EV_THROW
2667{ 3597{
2668 clear_pending (EV_A_ (W)w); 3598 clear_pending (EV_A_ (W)w);
2669 if (expect_false (!ev_is_active (w))) 3599 if (expect_false (!ev_is_active (w)))
2670 return; 3600 return;
2671 3601
… …
2680 3610
2681 EV_FREQUENT_CHECK; 3611 EV_FREQUENT_CHECK;
2682} 3612}
2683 3613
2684void noinline 3614void noinline
2685ev_timer_start (EV_P_ ev_timer *w) 3615ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2686{ 3616{
2687 if (expect_false (ev_is_active (w))) 3617 if (expect_false (ev_is_active (w)))
2688 return; 3618 return;
2689 3619
2690 ev_at (w) += mn_now; 3620 ev_at (w) += mn_now;
… …
2704 3634
2705 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3635 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2706} 3636}
2707 3637
2708void noinline 3638void noinline
2709ev_timer_stop (EV_P_ ev_timer *w) 3639ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2710{ 3640{
2711 clear_pending (EV_A_ (W)w); 3641 clear_pending (EV_A_ (W)w);
2712 if (expect_false (!ev_is_active (w))) 3642 if (expect_false (!ev_is_active (w)))
2713 return; 3643 return;
2714 3644
… …
2734 3664
2735 EV_FREQUENT_CHECK; 3665 EV_FREQUENT_CHECK;
2736} 3666}
2737 3667
2738void noinline 3668void noinline
2739ev_timer_again (EV_P_ ev_timer *w) 3669ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2740{ 3670{
2741 EV_FREQUENT_CHECK; 3671 EV_FREQUENT_CHECK;
3672
3673 clear_pending (EV_A_ (W)w);
2742 3674
2743 if (ev_is_active (w)) 3675 if (ev_is_active (w))
2744 { 3676 {
2745 if (w->repeat) 3677 if (w->repeat)
2746 { 3678 {
… …
2759 3691
2760 EV_FREQUENT_CHECK; 3692 EV_FREQUENT_CHECK;
2761} 3693}
2762 3694
2763ev_tstamp 3695ev_tstamp
2764ev_timer_remaining (EV_P_ ev_timer *w) 3696ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2765{ 3697{
2766 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3698 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2767} 3699}
2768 3700
2769#if EV_PERIODIC_ENABLE 3701#if EV_PERIODIC_ENABLE
2770void noinline 3702void noinline
2771ev_periodic_start (EV_P_ ev_periodic *w) 3703ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2772{ 3704{
2773 if (expect_false (ev_is_active (w))) 3705 if (expect_false (ev_is_active (w)))
2774 return; 3706 return;
2775 3707
2776 if (w->reschedule_cb) 3708 if (w->reschedule_cb)
… …
2796 3728
2797 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3729 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2798} 3730}
2799 3731
2800void noinline 3732void noinline
2801ev_periodic_stop (EV_P_ ev_periodic *w) 3733ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2802{ 3734{
2803 clear_pending (EV_A_ (W)w); 3735 clear_pending (EV_A_ (W)w);
2804 if (expect_false (!ev_is_active (w))) 3736 if (expect_false (!ev_is_active (w)))
2805 return; 3737 return;
2806 3738
… …
2824 3756
2825 EV_FREQUENT_CHECK; 3757 EV_FREQUENT_CHECK;
2826} 3758}
2827 3759
2828void noinline 3760void noinline
2829ev_periodic_again (EV_P_ ev_periodic *w) 3761ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2830{ 3762{
2831 /* TODO: use adjustheap and recalculation */ 3763 /* TODO: use adjustheap and recalculation */
2832 ev_periodic_stop (EV_A_ w); 3764 ev_periodic_stop (EV_A_ w);
2833 ev_periodic_start (EV_A_ w); 3765 ev_periodic_start (EV_A_ w);
2834} 3766}
… …
2839#endif 3771#endif
2840 3772
2841#if EV_SIGNAL_ENABLE 3773#if EV_SIGNAL_ENABLE
2842 3774
2843void noinline 3775void noinline
2844ev_signal_start (EV_P_ ev_signal *w) 3776ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2845{ 3777{
2846 if (expect_false (ev_is_active (w))) 3778 if (expect_false (ev_is_active (w)))
2847 return; 3779 return;
2848 3780
2849 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3781 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2851#if EV_MULTIPLICITY 3783#if EV_MULTIPLICITY
2852 assert (("libev: a signal must not be attached to two different loops", 3784 assert (("libev: a signal must not be attached to two different loops",
2853 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3785 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2854 3786
2855 signals [w->signum - 1].loop = EV_A; 3787 signals [w->signum - 1].loop = EV_A;
3788 ECB_MEMORY_FENCE_RELEASE;
2856#endif 3789#endif
2857 3790
2858 EV_FREQUENT_CHECK; 3791 EV_FREQUENT_CHECK;
2859 3792
2860#if EV_USE_SIGNALFD 3793#if EV_USE_SIGNALFD
… …
2920 3853
2921 EV_FREQUENT_CHECK; 3854 EV_FREQUENT_CHECK;
2922} 3855}
2923 3856
2924void noinline 3857void noinline
2925ev_signal_stop (EV_P_ ev_signal *w) 3858ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2926{ 3859{
2927 clear_pending (EV_A_ (W)w); 3860 clear_pending (EV_A_ (W)w);
2928 if (expect_false (!ev_is_active (w))) 3861 if (expect_false (!ev_is_active (w)))
2929 return; 3862 return;
2930 3863
… …
2961#endif 3894#endif
2962 3895
2963#if EV_CHILD_ENABLE 3896#if EV_CHILD_ENABLE
2964 3897
2965void 3898void
2966ev_child_start (EV_P_ ev_child *w) 3899ev_child_start (EV_P_ ev_child *w) EV_THROW
2967{ 3900{
2968#if EV_MULTIPLICITY 3901#if EV_MULTIPLICITY
2969 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3902 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2970#endif 3903#endif
2971 if (expect_false (ev_is_active (w))) 3904 if (expect_false (ev_is_active (w)))
… …
2978 3911
2979 EV_FREQUENT_CHECK; 3912 EV_FREQUENT_CHECK;
2980} 3913}
2981 3914
2982void 3915void
2983ev_child_stop (EV_P_ ev_child *w) 3916ev_child_stop (EV_P_ ev_child *w) EV_THROW
2984{ 3917{
2985 clear_pending (EV_A_ (W)w); 3918 clear_pending (EV_A_ (W)w);
2986 if (expect_false (!ev_is_active (w))) 3919 if (expect_false (!ev_is_active (w)))
2987 return; 3920 return;
2988 3921
… …
3015# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3948# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3016 3949
3017static void noinline 3950static void noinline
3018infy_add (EV_P_ ev_stat *w) 3951infy_add (EV_P_ ev_stat *w)
3019{ 3952{
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); 3953 w->wd = inotify_add_watch (fs_fd, w->path,
3954 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3955 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3956 | IN_DONT_FOLLOW | IN_MASK_ADD);
3021 3957
3022 if (w->wd >= 0) 3958 if (w->wd >= 0)
3023 { 3959 {
3024 struct statfs sfs; 3960 struct statfs sfs;
3025 3961
… …
3029 3965
3030 if (!fs_2625) 3966 if (!fs_2625)
3031 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3967 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3032 else if (!statfs (w->path, &sfs) 3968 else if (!statfs (w->path, &sfs)
3033 && (sfs.f_type == 0x1373 /* devfs */ 3969 && (sfs.f_type == 0x1373 /* devfs */
3970 || sfs.f_type == 0x4006 /* fat */
3971 || sfs.f_type == 0x4d44 /* msdos */
3034 || sfs.f_type == 0xEF53 /* ext2/3 */ 3972 || sfs.f_type == 0xEF53 /* ext2/3 */
3973 || sfs.f_type == 0x72b6 /* jffs2 */
3974 || sfs.f_type == 0x858458f6 /* ramfs */
3975 || sfs.f_type == 0x5346544e /* ntfs */
3035 || sfs.f_type == 0x3153464a /* jfs */ 3976 || sfs.f_type == 0x3153464a /* jfs */
3977 || sfs.f_type == 0x9123683e /* btrfs */
3036 || sfs.f_type == 0x52654973 /* reiser3 */ 3978 || sfs.f_type == 0x52654973 /* reiser3 */
3037 || sfs.f_type == 0x01021994 /* tempfs */ 3979 || sfs.f_type == 0x01021994 /* tmpfs */
3038 || sfs.f_type == 0x58465342 /* xfs */)) 3980 || sfs.f_type == 0x58465342 /* xfs */))
3039 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3981 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3040 else 3982 else
3041 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3983 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3042 } 3984 }
… …
3063 if (!pend || pend == path) 4005 if (!pend || pend == path)
3064 break; 4006 break;
3065 4007
3066 *pend = 0; 4008 *pend = 0;
3067 w->wd = inotify_add_watch (fs_fd, path, mask); 4009 w->wd = inotify_add_watch (fs_fd, path, mask);
3068 } 4010 }
3069 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4011 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3070 } 4012 }
3071 } 4013 }
3072 4014
3073 if (w->wd >= 0) 4015 if (w->wd >= 0)
… …
3140 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4082 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141 ofs += sizeof (struct inotify_event) + ev->len; 4083 ofs += sizeof (struct inotify_event) + ev->len;
3142 } 4084 }
3143} 4085}
3144 4086
3145inline_size void 4087inline_size void ecb_cold
3146ev_check_2625 (EV_P) 4088ev_check_2625 (EV_P)
3147{ 4089{
3148 /* kernels < 2.6.25 are borked 4090 /* kernels < 2.6.25 are borked
3149 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150 */ 4092 */
… …
3155} 4097}
3156 4098
3157inline_size int 4099inline_size int
3158infy_newfd (void) 4100infy_newfd (void)
3159{ 4101{
3160#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4102#if defined IN_CLOEXEC && defined IN_NONBLOCK
3161 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3162 if (fd >= 0) 4104 if (fd >= 0)
3163 return fd; 4105 return fd;
3164#endif 4106#endif
3165 return inotify_init (); 4107 return inotify_init ();
… …
3240#else 4182#else
3241# define EV_LSTAT(p,b) lstat (p, b) 4183# define EV_LSTAT(p,b) lstat (p, b)
3242#endif 4184#endif
3243 4185
3244void 4186void
3245ev_stat_stat (EV_P_ ev_stat *w) 4187ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3246{ 4188{
3247 if (lstat (w->path, &w->attr) < 0) 4189 if (lstat (w->path, &w->attr) < 0)
3248 w->attr.st_nlink = 0; 4190 w->attr.st_nlink = 0;
3249 else if (!w->attr.st_nlink) 4191 else if (!w->attr.st_nlink)
3250 w->attr.st_nlink = 1; 4192 w->attr.st_nlink = 1;
… …
3289 ev_feed_event (EV_A_ w, EV_STAT); 4231 ev_feed_event (EV_A_ w, EV_STAT);
3290 } 4232 }
3291} 4233}
3292 4234
3293void 4235void
3294ev_stat_start (EV_P_ ev_stat *w) 4236ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3295{ 4237{
3296 if (expect_false (ev_is_active (w))) 4238 if (expect_false (ev_is_active (w)))
3297 return; 4239 return;
3298 4240
3299 ev_stat_stat (EV_A_ w); 4241 ev_stat_stat (EV_A_ w);
… …
3320 4262
3321 EV_FREQUENT_CHECK; 4263 EV_FREQUENT_CHECK;
3322} 4264}
3323 4265
3324void 4266void
3325ev_stat_stop (EV_P_ ev_stat *w) 4267ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3326{ 4268{
3327 clear_pending (EV_A_ (W)w); 4269 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w))) 4270 if (expect_false (!ev_is_active (w)))
3329 return; 4271 return;
3330 4272
… …
3346} 4288}
3347#endif 4289#endif
3348 4290
3349#if EV_IDLE_ENABLE 4291#if EV_IDLE_ENABLE
3350void 4292void
3351ev_idle_start (EV_P_ ev_idle *w) 4293ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3352{ 4294{
3353 if (expect_false (ev_is_active (w))) 4295 if (expect_false (ev_is_active (w)))
3354 return; 4296 return;
3355 4297
3356 pri_adjust (EV_A_ (W)w); 4298 pri_adjust (EV_A_ (W)w);
… …
3369 4311
3370 EV_FREQUENT_CHECK; 4312 EV_FREQUENT_CHECK;
3371} 4313}
3372 4314
3373void 4315void
3374ev_idle_stop (EV_P_ ev_idle *w) 4316ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3375{ 4317{
3376 clear_pending (EV_A_ (W)w); 4318 clear_pending (EV_A_ (W)w);
3377 if (expect_false (!ev_is_active (w))) 4319 if (expect_false (!ev_is_active (w)))
3378 return; 4320 return;
3379 4321
… …
3393} 4335}
3394#endif 4336#endif
3395 4337
3396#if EV_PREPARE_ENABLE 4338#if EV_PREPARE_ENABLE
3397void 4339void
3398ev_prepare_start (EV_P_ ev_prepare *w) 4340ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3399{ 4341{
3400 if (expect_false (ev_is_active (w))) 4342 if (expect_false (ev_is_active (w)))
3401 return; 4343 return;
3402 4344
3403 EV_FREQUENT_CHECK; 4345 EV_FREQUENT_CHECK;
… …
3408 4350
3409 EV_FREQUENT_CHECK; 4351 EV_FREQUENT_CHECK;
3410} 4352}
3411 4353
3412void 4354void
3413ev_prepare_stop (EV_P_ ev_prepare *w) 4355ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3414{ 4356{
3415 clear_pending (EV_A_ (W)w); 4357 clear_pending (EV_A_ (W)w);
3416 if (expect_false (!ev_is_active (w))) 4358 if (expect_false (!ev_is_active (w)))
3417 return; 4359 return;
3418 4360
… …
3431} 4373}
3432#endif 4374#endif
3433 4375
3434#if EV_CHECK_ENABLE 4376#if EV_CHECK_ENABLE
3435void 4377void
3436ev_check_start (EV_P_ ev_check *w) 4378ev_check_start (EV_P_ ev_check *w) EV_THROW
3437{ 4379{
3438 if (expect_false (ev_is_active (w))) 4380 if (expect_false (ev_is_active (w)))
3439 return; 4381 return;
3440 4382
3441 EV_FREQUENT_CHECK; 4383 EV_FREQUENT_CHECK;
… …
3446 4388
3447 EV_FREQUENT_CHECK; 4389 EV_FREQUENT_CHECK;
3448} 4390}
3449 4391
3450void 4392void
3451ev_check_stop (EV_P_ ev_check *w) 4393ev_check_stop (EV_P_ ev_check *w) EV_THROW
3452{ 4394{
3453 clear_pending (EV_A_ (W)w); 4395 clear_pending (EV_A_ (W)w);
3454 if (expect_false (!ev_is_active (w))) 4396 if (expect_false (!ev_is_active (w)))
3455 return; 4397 return;
3456 4398
… …
3469} 4411}
3470#endif 4412#endif
3471 4413
3472#if EV_EMBED_ENABLE 4414#if EV_EMBED_ENABLE
3473void noinline 4415void noinline
3474ev_embed_sweep (EV_P_ ev_embed *w) 4416ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3475{ 4417{
3476 ev_run (w->other, EVRUN_NOWAIT); 4418 ev_run (w->other, EVRUN_NOWAIT);
3477} 4419}
3478 4420
3479static void 4421static void
… …
3527 ev_idle_stop (EV_A_ idle); 4469 ev_idle_stop (EV_A_ idle);
3528} 4470}
3529#endif 4471#endif
3530 4472
3531void 4473void
3532ev_embed_start (EV_P_ ev_embed *w) 4474ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3533{ 4475{
3534 if (expect_false (ev_is_active (w))) 4476 if (expect_false (ev_is_active (w)))
3535 return; 4477 return;
3536 4478
3537 { 4479 {
… …
3558 4500
3559 EV_FREQUENT_CHECK; 4501 EV_FREQUENT_CHECK;
3560} 4502}
3561 4503
3562void 4504void
3563ev_embed_stop (EV_P_ ev_embed *w) 4505ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3564{ 4506{
3565 clear_pending (EV_A_ (W)w); 4507 clear_pending (EV_A_ (W)w);
3566 if (expect_false (!ev_is_active (w))) 4508 if (expect_false (!ev_is_active (w)))
3567 return; 4509 return;
3568 4510
… …
3578} 4520}
3579#endif 4521#endif
3580 4522
3581#if EV_FORK_ENABLE 4523#if EV_FORK_ENABLE
3582void 4524void
3583ev_fork_start (EV_P_ ev_fork *w) 4525ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3584{ 4526{
3585 if (expect_false (ev_is_active (w))) 4527 if (expect_false (ev_is_active (w)))
3586 return; 4528 return;
3587 4529
3588 EV_FREQUENT_CHECK; 4530 EV_FREQUENT_CHECK;
… …
3593 4535
3594 EV_FREQUENT_CHECK; 4536 EV_FREQUENT_CHECK;
3595} 4537}
3596 4538
3597void 4539void
3598ev_fork_stop (EV_P_ ev_fork *w) 4540ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3599{ 4541{
3600 clear_pending (EV_A_ (W)w); 4542 clear_pending (EV_A_ (W)w);
3601 if (expect_false (!ev_is_active (w))) 4543 if (expect_false (!ev_is_active (w)))
3602 return; 4544 return;
3603 4545
… …
3616} 4558}
3617#endif 4559#endif
3618 4560
3619#if EV_CLEANUP_ENABLE 4561#if EV_CLEANUP_ENABLE
3620void 4562void
3621ev_cleanup_start (EV_P_ ev_cleanup *w) 4563ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3622{ 4564{
3623 if (expect_false (ev_is_active (w))) 4565 if (expect_false (ev_is_active (w)))
3624 return; 4566 return;
3625 4567
3626 EV_FREQUENT_CHECK; 4568 EV_FREQUENT_CHECK;
… …
3633 ev_unref (EV_A); 4575 ev_unref (EV_A);
3634 EV_FREQUENT_CHECK; 4576 EV_FREQUENT_CHECK;
3635} 4577}
3636 4578
3637void 4579void
3638ev_cleanup_stop (EV_P_ ev_cleanup *w) 4580ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3639{ 4581{
3640 clear_pending (EV_A_ (W)w); 4582 clear_pending (EV_A_ (W)w);
3641 if (expect_false (!ev_is_active (w))) 4583 if (expect_false (!ev_is_active (w)))
3642 return; 4584 return;
3643 4585
… …
3657} 4599}
3658#endif 4600#endif
3659 4601
3660#if EV_ASYNC_ENABLE 4602#if EV_ASYNC_ENABLE
3661void 4603void
3662ev_async_start (EV_P_ ev_async *w) 4604ev_async_start (EV_P_ ev_async *w) EV_THROW
3663{ 4605{
3664 if (expect_false (ev_is_active (w))) 4606 if (expect_false (ev_is_active (w)))
3665 return; 4607 return;
3666 4608
3667 w->sent = 0; 4609 w->sent = 0;
… …
3676 4618
3677 EV_FREQUENT_CHECK; 4619 EV_FREQUENT_CHECK;
3678} 4620}
3679 4621
3680void 4622void
3681ev_async_stop (EV_P_ ev_async *w) 4623ev_async_stop (EV_P_ ev_async *w) EV_THROW
3682{ 4624{
3683 clear_pending (EV_A_ (W)w); 4625 clear_pending (EV_A_ (W)w);
3684 if (expect_false (!ev_is_active (w))) 4626 if (expect_false (!ev_is_active (w)))
3685 return; 4627 return;
3686 4628
… …
3697 4639
3698 EV_FREQUENT_CHECK; 4640 EV_FREQUENT_CHECK;
3699} 4641}
3700 4642
3701void 4643void
3702ev_async_send (EV_P_ ev_async *w) 4644ev_async_send (EV_P_ ev_async *w) EV_THROW
3703{ 4645{
3704 w->sent = 1; 4646 w->sent = 1;
3705 evpipe_write (EV_A_ &async_pending); 4647 evpipe_write (EV_A_ &async_pending);
3706} 4648}
3707#endif 4649#endif
… …
3744 4686
3745 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4687 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3746} 4688}
3747 4689
3748void 4690void
3749ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4691ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3750{ 4692{
3751 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4693 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3752 4694
3753 if (expect_false (!once)) 4695 if (expect_false (!once))
3754 { 4696 {
… …
3775} 4717}
3776 4718
3777/*****************************************************************************/ 4719/*****************************************************************************/
3778 4720
3779#if EV_WALK_ENABLE 4721#if EV_WALK_ENABLE
3780void 4722void ecb_cold
3781ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4723ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3782{ 4724{
3783 int i, j; 4725 int i, j;
3784 ev_watcher_list *wl, *wn; 4726 ev_watcher_list *wl, *wn;
3785 4727
3786 if (types & (EV_IO | EV_EMBED)) 4728 if (types & (EV_IO | EV_EMBED))
… …
3829 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4771 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3830#endif 4772#endif
3831 4773
3832#if EV_IDLE_ENABLE 4774#if EV_IDLE_ENABLE
3833 if (types & EV_IDLE) 4775 if (types & EV_IDLE)
3834 for (j = NUMPRI; i--; ) 4776 for (j = NUMPRI; j--; )
3835 for (i = idlecnt [j]; i--; ) 4777 for (i = idlecnt [j]; i--; )
3836 cb (EV_A_ EV_IDLE, idles [j][i]); 4778 cb (EV_A_ EV_IDLE, idles [j][i]);
3837#endif 4779#endif
3838 4780
3839#if EV_FORK_ENABLE 4781#if EV_FORK_ENABLE
… …
3892 4834
3893#if EV_MULTIPLICITY 4835#if EV_MULTIPLICITY
3894 #include "ev_wrap.h" 4836 #include "ev_wrap.h"
3895#endif 4837#endif
3896 4838
3897EV_CPP(})
3898

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