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Comparing libev/ev.c (file contents):
Revision 1.389 by root, Wed Aug 3 15:31:23 2011 UTC vs.
Revision 1.455 by root, Sun Apr 28 12:45:20 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 *
… …
59# endif 59# endif
60# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
62# endif 62# endif
63# endif 63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
66# endif 66# endif
67 67
68# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
183# include EV_H 183# include EV_H
184#else 184#else
185# include "ev.h" 185# include "ev.h"
186#endif 186#endif
187 187
188EV_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
189 198
190#ifndef _WIN32 199#ifndef _WIN32
191# include <sys/time.h> 200# include <sys/time.h>
192# include <sys/wait.h> 201# include <sys/wait.h>
193# include <unistd.h> 202# include <unistd.h>
194#else 203#else
195# include <io.h> 204# include <io.h>
196# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
197# include <windows.h> 207# include <windows.h>
198# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
199# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
200# endif 210# endif
201# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
210#define _DARWIN_UNLIMITED_SELECT 1 220#define _DARWIN_UNLIMITED_SELECT 1
211 221
212/* 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 */
213 223
214/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG) 225#if defined EV_NSIG
216/* use what's provided */ 226/* use what's provided */
217#elif defined (NSIG) 227#elif defined NSIG
218# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
219#elif defined(_NSIG) 229#elif defined _NSIG
220# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX) 231#elif defined SIGMAX
222# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX) 233#elif defined SIG_MAX
224# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
226# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG) 237#elif defined MAXSIG
228# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG) 239#elif defined MAX_SIG
230# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig) 243#elif defined _sys_nsig
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else 245#else
236# error "unable to find value for NSIG, please report" 246# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */ 247/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */ 248/* but consider reporting it, too! :) */
… …
250# define EV_USE_CLOCK_SYSCALL 0 260# define EV_USE_CLOCK_SYSCALL 0
251# endif 261# endif
252#endif 262#endif
253 263
254#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS 266# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else 267# else
258# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
259# endif 269# endif
260#endif 270#endif
… …
347 357
348#ifndef EV_HEAP_CACHE_AT 358#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif 360#endif
351 361
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
352/* 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, */
353/* which makes programs even slower. might work on other unices, too. */ 379/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL 380#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h> 381# include <sys/syscall.h>
356# ifdef SYS_clock_gettime 382# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 383# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1 385# define EV_USE_MONOTONIC 1
360# else 386# else
… …
363# endif 389# endif
364#endif 390#endif
365 391
366/* 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 */
367 393
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
373
374#ifndef CLOCK_MONOTONIC 394#ifndef CLOCK_MONOTONIC
375# undef EV_USE_MONOTONIC 395# undef EV_USE_MONOTONIC
376# define EV_USE_MONOTONIC 0 396# define EV_USE_MONOTONIC 0
377#endif 397#endif
378 398
… …
386# define EV_USE_INOTIFY 0 406# define EV_USE_INOTIFY 0
387#endif 407#endif
388 408
389#if !EV_USE_NANOSLEEP 409#if !EV_USE_NANOSLEEP
390/* 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 */
391# if !defined(_WIN32) && !defined(__hpux) 411# if !defined _WIN32 && !defined __hpux
392# include <sys/select.h> 412# include <sys/select.h>
393# endif 413# endif
394#endif 414#endif
395 415
396#if EV_USE_INOTIFY 416#if EV_USE_INOTIFY
… …
399/* 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 */
400# ifndef IN_DONT_FOLLOW 420# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY 421# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0 422# define EV_USE_INOTIFY 0
403# endif 423# endif
404#endif
405
406#if EV_SELECT_IS_WINSOCKET
407# include <winsock.h>
408#endif 424#endif
409 425
410#if EV_USE_EVENTFD 426#if EV_USE_EVENTFD
411/* 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 */
412# include <stdint.h> 428# include <stdint.h>
… …
464#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) */
465 481
466#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)
467#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)
468 484
469/* the following are taken from libecb */ 485/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ecb.h start */ 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;
529 #if __GNUC__
530 typedef signed long long int64_t;
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
545#else
546 #include <inttypes.h>
547 #if UINTMAX_MAX > 0xffffffffU
548 #define ECB_PTRSIZE 8
549 #else
550 #define ECB_PTRSIZE 4
551 #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
560 #endif
561#endif
471 562
472/* many compilers define _GNUC_ to some versions but then only implement 563/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions, 564 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers. 565 * causing enormous grief in return for some better fake benchmark numbers.
475 * or so. 566 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have 567 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place. 568 * an issue with that they should have done it right in the first place.
478 */ 569 */
479#ifndef ECB_GCC_VERSION 570#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) 571 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
481 #define ECB_GCC_VERSION(major,minor) 0 572 #define ECB_GCC_VERSION(major,minor) 0
482 #else 573 #else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 574 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
484 #endif 575 #endif
485#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 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
633 #elif defined __alpha__
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
635 #elif defined __hppa__
636 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
637 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
638 #elif defined __ia64__
639 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
640 #endif
641 #endif
642#endif
643
644#ifndef ECB_MEMORY_FENCE
645 #if ECB_GCC_VERSION(4,7)
646 /* see comment below (stdatomic.h) about the C11 memory model. */
647 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
648
649 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
650 * without risking compile time errors with other compilers. We *could*
651 * define our own ecb_clang_has_feature, but I just can't be bothered to work
652 * around this shit time and again.
653 * #elif defined __clang && __has_feature (cxx_atomic)
654 * // see comment below (stdatomic.h) about the C11 memory model.
655 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
656 */
657
658 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
659 #define ECB_MEMORY_FENCE __sync_synchronize ()
660 #elif _MSC_VER >= 1400 /* VC++ 2005 */
661 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
662 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
663 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
664 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
665 #elif defined _WIN32
666 #include <WinNT.h>
667 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
668 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
669 #include <mbarrier.h>
670 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
671 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
672 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
673 #elif __xlC__
674 #define ECB_MEMORY_FENCE __sync ()
675 #endif
676#endif
677
678#ifndef ECB_MEMORY_FENCE
679 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
680 /* we assume that these memory fences work on all variables/all memory accesses, */
681 /* not just C11 atomics and atomic accesses */
682 #include <stdatomic.h>
683 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
684 /* any fence other than seq_cst, which isn't very efficient for us. */
685 /* Why that is, we don't know - either the C11 memory model is quite useless */
686 /* for most usages, or gcc and clang have a bug */
687 /* I *currently* lean towards the latter, and inefficiently implement */
688 /* all three of ecb's fences as a seq_cst fence */
689 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
690 #endif
691#endif
692
693#ifndef ECB_MEMORY_FENCE
694 #if !ECB_AVOID_PTHREADS
695 /*
696 * if you get undefined symbol references to pthread_mutex_lock,
697 * or failure to find pthread.h, then you should implement
698 * the ECB_MEMORY_FENCE operations for your cpu/compiler
699 * OR provide pthread.h and link against the posix thread library
700 * of your system.
701 */
702 #include <pthread.h>
703 #define ECB_NEEDS_PTHREADS 1
704 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
705
706 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
707 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
708 #endif
709#endif
710
711#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
712 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
713#endif
714
715#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
716 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
717#endif
718
719/*****************************************************************************/
486 720
487#if __cplusplus 721#if __cplusplus
488 #define ecb_inline static inline 722 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5) 723#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__ 724 #define ecb_inline static __inline__
… …
492 #define ecb_inline static inline 726 #define ecb_inline static inline
493#else 727#else
494 #define ecb_inline static 728 #define ecb_inline static
495#endif 729#endif
496 730
497#ifndef ECB_MEMORY_FENCE
498 #if ECB_GCC_VERSION(2,5) 731#if ECB_GCC_VERSION(3,3)
499 #if __x86 732 #define ecb_restrict __restrict__
500 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 733#elif ECB_C99
501 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 734 #define ecb_restrict restrict
502 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */ 735#else
503 #elif __amd64 736 #define ecb_restrict
504 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
505 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
506 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
507 #endif
508 #endif 737#endif
509#endif
510 738
511#ifndef ECB_MEMORY_FENCE 739typedef int ecb_bool;
512 #if ECB_GCC_VERSION(4,4)
513 #define ECB_MEMORY_FENCE __sync_synchronize ()
514 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
515 #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
516 #elif _MSC_VER >= 1400 /* VC++ 2005 */
517 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
518 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
519 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
520 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
521 #elif defined(_WIN32)
522 #include <WinNT.h>
523 #define ECB_MEMORY_FENCE MemoryBarrier ()
524 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
525 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
526 #endif
527#endif
528 740
529#ifndef ECB_MEMORY_FENCE 741#define ECB_CONCAT_(a, b) a ## b
530 #include <pthread.h> 742#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
743#define ECB_STRINGIFY_(a) # a
744#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
531 745
532 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; 746#define ecb_function_ ecb_inline
533 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
534 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
535 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
536#endif
537 747
538#if ECB_GCC_VERSION(3,1) 748#if ECB_GCC_VERSION(3,1)
539 #define ecb_attribute(attrlist) __attribute__(attrlist) 749 #define ecb_attribute(attrlist) __attribute__(attrlist)
540 #define ecb_is_constant(expr) __builtin_constant_p (expr) 750 #define ecb_is_constant(expr) __builtin_constant_p (expr)
541 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 751 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
… …
545 #define ecb_is_constant(expr) 0 755 #define ecb_is_constant(expr) 0
546 #define ecb_expect(expr,value) (expr) 756 #define ecb_expect(expr,value) (expr)
547 #define ecb_prefetch(addr,rw,locality) 757 #define ecb_prefetch(addr,rw,locality)
548#endif 758#endif
549 759
760/* no emulation for ecb_decltype */
761#if ECB_GCC_VERSION(4,5)
762 #define ecb_decltype(x) __decltype(x)
763#elif ECB_GCC_VERSION(3,0)
764 #define ecb_decltype(x) __typeof(x)
765#endif
766
550#define ecb_noinline ecb_attribute ((__noinline__)) 767#define ecb_noinline ecb_attribute ((__noinline__))
551#define ecb_noreturn ecb_attribute ((__noreturn__))
552#define ecb_unused ecb_attribute ((__unused__)) 768#define ecb_unused ecb_attribute ((__unused__))
553#define ecb_const ecb_attribute ((__const__)) 769#define ecb_const ecb_attribute ((__const__))
554#define ecb_pure ecb_attribute ((__pure__)) 770#define ecb_pure ecb_attribute ((__pure__))
771
772#if ECB_C11
773 #define ecb_noreturn _Noreturn
774#else
775 #define ecb_noreturn ecb_attribute ((__noreturn__))
776#endif
555 777
556#if ECB_GCC_VERSION(4,3) 778#if ECB_GCC_VERSION(4,3)
557 #define ecb_artificial ecb_attribute ((__artificial__)) 779 #define ecb_artificial ecb_attribute ((__artificial__))
558 #define ecb_hot ecb_attribute ((__hot__)) 780 #define ecb_hot ecb_attribute ((__hot__))
559 #define ecb_cold ecb_attribute ((__cold__)) 781 #define ecb_cold ecb_attribute ((__cold__))
… …
566/* put around conditional expressions if you are very sure that the */ 788/* put around conditional expressions if you are very sure that the */
567/* expression is mostly true or mostly false. note that these return */ 789/* expression is mostly true or mostly false. note that these return */
568/* booleans, not the expression. */ 790/* booleans, not the expression. */
569#define ecb_expect_false(expr) ecb_expect (!!(expr), 0) 791#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
570#define ecb_expect_true(expr) ecb_expect (!!(expr), 1) 792#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
571/* ecb.h end */ 793/* for compatibility to the rest of the world */
794#define ecb_likely(expr) ecb_expect_true (expr)
795#define ecb_unlikely(expr) ecb_expect_false (expr)
796
797/* count trailing zero bits and count # of one bits */
798#if ECB_GCC_VERSION(3,4)
799 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
800 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
801 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
802 #define ecb_ctz32(x) __builtin_ctz (x)
803 #define ecb_ctz64(x) __builtin_ctzll (x)
804 #define ecb_popcount32(x) __builtin_popcount (x)
805 /* no popcountll */
806#else
807 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
808 ecb_function_ int
809 ecb_ctz32 (uint32_t x)
810 {
811 int r = 0;
812
813 x &= ~x + 1; /* this isolates the lowest bit */
814
815#if ECB_branchless_on_i386
816 r += !!(x & 0xaaaaaaaa) << 0;
817 r += !!(x & 0xcccccccc) << 1;
818 r += !!(x & 0xf0f0f0f0) << 2;
819 r += !!(x & 0xff00ff00) << 3;
820 r += !!(x & 0xffff0000) << 4;
821#else
822 if (x & 0xaaaaaaaa) r += 1;
823 if (x & 0xcccccccc) r += 2;
824 if (x & 0xf0f0f0f0) r += 4;
825 if (x & 0xff00ff00) r += 8;
826 if (x & 0xffff0000) r += 16;
827#endif
828
829 return r;
830 }
831
832 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
833 ecb_function_ int
834 ecb_ctz64 (uint64_t x)
835 {
836 int shift = x & 0xffffffffU ? 0 : 32;
837 return ecb_ctz32 (x >> shift) + shift;
838 }
839
840 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
841 ecb_function_ int
842 ecb_popcount32 (uint32_t x)
843 {
844 x -= (x >> 1) & 0x55555555;
845 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
846 x = ((x >> 4) + x) & 0x0f0f0f0f;
847 x *= 0x01010101;
848
849 return x >> 24;
850 }
851
852 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
853 ecb_function_ int ecb_ld32 (uint32_t x)
854 {
855 int r = 0;
856
857 if (x >> 16) { x >>= 16; r += 16; }
858 if (x >> 8) { x >>= 8; r += 8; }
859 if (x >> 4) { x >>= 4; r += 4; }
860 if (x >> 2) { x >>= 2; r += 2; }
861 if (x >> 1) { r += 1; }
862
863 return r;
864 }
865
866 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
867 ecb_function_ int ecb_ld64 (uint64_t x)
868 {
869 int r = 0;
870
871 if (x >> 32) { x >>= 32; r += 32; }
872
873 return r + ecb_ld32 (x);
874 }
875#endif
876
877ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
878ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
879ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
880ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
881
882ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
883ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
884{
885 return ( (x * 0x0802U & 0x22110U)
886 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
887}
888
889ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
890ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
891{
892 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
893 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
894 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
895 x = ( x >> 8 ) | ( x << 8);
896
897 return x;
898}
899
900ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
901ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
902{
903 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
904 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
905 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
906 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
907 x = ( x >> 16 ) | ( x << 16);
908
909 return x;
910}
911
912/* popcount64 is only available on 64 bit cpus as gcc builtin */
913/* so for this version we are lazy */
914ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
915ecb_function_ int
916ecb_popcount64 (uint64_t x)
917{
918 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
919}
920
921ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
922ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
923ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
924ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
925ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
926ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
927ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
928ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
929
930ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
931ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
932ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
933ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
934ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
935ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
936ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
937ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
938
939#if ECB_GCC_VERSION(4,3)
940 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
941 #define ecb_bswap32(x) __builtin_bswap32 (x)
942 #define ecb_bswap64(x) __builtin_bswap64 (x)
943#else
944 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
945 ecb_function_ uint16_t
946 ecb_bswap16 (uint16_t x)
947 {
948 return ecb_rotl16 (x, 8);
949 }
950
951 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
952 ecb_function_ uint32_t
953 ecb_bswap32 (uint32_t x)
954 {
955 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
956 }
957
958 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
959 ecb_function_ uint64_t
960 ecb_bswap64 (uint64_t x)
961 {
962 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
963 }
964#endif
965
966#if ECB_GCC_VERSION(4,5)
967 #define ecb_unreachable() __builtin_unreachable ()
968#else
969 /* this seems to work fine, but gcc always emits a warning for it :/ */
970 ecb_inline void ecb_unreachable (void) ecb_noreturn;
971 ecb_inline void ecb_unreachable (void) { }
972#endif
973
974/* try to tell the compiler that some condition is definitely true */
975#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
976
977ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
978ecb_inline unsigned char
979ecb_byteorder_helper (void)
980{
981 /* the union code still generates code under pressure in gcc, */
982 /* but less than using pointers, and always seems to */
983 /* successfully return a constant. */
984 /* the reason why we have this horrible preprocessor mess */
985 /* is to avoid it in all cases, at least on common architectures */
986 /* or when using a recent enough gcc version (>= 4.6) */
987#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
988 return 0x44;
989#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
990 return 0x44;
991#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
992 return 0x11;
993#else
994 union
995 {
996 uint32_t i;
997 uint8_t c;
998 } u = { 0x11223344 };
999 return u.c;
1000#endif
1001}
1002
1003ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1004ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1005ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1006ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1007
1008#if ECB_GCC_VERSION(3,0) || ECB_C99
1009 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1010#else
1011 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1012#endif
1013
1014#if __cplusplus
1015 template<typename T>
1016 static inline T ecb_div_rd (T val, T div)
1017 {
1018 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1019 }
1020 template<typename T>
1021 static inline T ecb_div_ru (T val, T div)
1022 {
1023 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1024 }
1025#else
1026 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1027 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1028#endif
1029
1030#if ecb_cplusplus_does_not_suck
1031 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1032 template<typename T, int N>
1033 static inline int ecb_array_length (const T (&arr)[N])
1034 {
1035 return N;
1036 }
1037#else
1038 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1039#endif
1040
1041/*******************************************************************************/
1042/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1043
1044/* basically, everything uses "ieee pure-endian" floating point numbers */
1045/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1046#if 0 \
1047 || __i386 || __i386__ \
1048 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1049 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1050 || defined __arm__ && defined __ARM_EABI__ \
1051 || defined __s390__ || defined __s390x__ \
1052 || defined __mips__ \
1053 || defined __alpha__ \
1054 || defined __hppa__ \
1055 || defined __ia64__ \
1056 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1057 #define ECB_STDFP 1
1058 #include <string.h> /* for memcpy */
1059#else
1060 #define ECB_STDFP 0
1061 #include <math.h> /* for frexp*, ldexp* */
1062#endif
1063
1064#ifndef ECB_NO_LIBM
1065
1066 /* convert a float to ieee single/binary32 */
1067 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1068 ecb_function_ uint32_t
1069 ecb_float_to_binary32 (float x)
1070 {
1071 uint32_t r;
1072
1073 #if ECB_STDFP
1074 memcpy (&r, &x, 4);
1075 #else
1076 /* slow emulation, works for anything but -0 */
1077 uint32_t m;
1078 int e;
1079
1080 if (x == 0e0f ) return 0x00000000U;
1081 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1082 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1083 if (x != x ) return 0x7fbfffffU;
1084
1085 m = frexpf (x, &e) * 0x1000000U;
1086
1087 r = m & 0x80000000U;
1088
1089 if (r)
1090 m = -m;
1091
1092 if (e <= -126)
1093 {
1094 m &= 0xffffffU;
1095 m >>= (-125 - e);
1096 e = -126;
1097 }
1098
1099 r |= (e + 126) << 23;
1100 r |= m & 0x7fffffU;
1101 #endif
1102
1103 return r;
1104 }
1105
1106 /* converts an ieee single/binary32 to a float */
1107 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1108 ecb_function_ float
1109 ecb_binary32_to_float (uint32_t x)
1110 {
1111 float r;
1112
1113 #if ECB_STDFP
1114 memcpy (&r, &x, 4);
1115 #else
1116 /* emulation, only works for normals and subnormals and +0 */
1117 int neg = x >> 31;
1118 int e = (x >> 23) & 0xffU;
1119
1120 x &= 0x7fffffU;
1121
1122 if (e)
1123 x |= 0x800000U;
1124 else
1125 e = 1;
1126
1127 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1128 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1129
1130 r = neg ? -r : r;
1131 #endif
1132
1133 return r;
1134 }
1135
1136 /* convert a double to ieee double/binary64 */
1137 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1138 ecb_function_ uint64_t
1139 ecb_double_to_binary64 (double x)
1140 {
1141 uint64_t r;
1142
1143 #if ECB_STDFP
1144 memcpy (&r, &x, 8);
1145 #else
1146 /* slow emulation, works for anything but -0 */
1147 uint64_t m;
1148 int e;
1149
1150 if (x == 0e0 ) return 0x0000000000000000U;
1151 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1152 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1153 if (x != x ) return 0X7ff7ffffffffffffU;
1154
1155 m = frexp (x, &e) * 0x20000000000000U;
1156
1157 r = m & 0x8000000000000000;;
1158
1159 if (r)
1160 m = -m;
1161
1162 if (e <= -1022)
1163 {
1164 m &= 0x1fffffffffffffU;
1165 m >>= (-1021 - e);
1166 e = -1022;
1167 }
1168
1169 r |= ((uint64_t)(e + 1022)) << 52;
1170 r |= m & 0xfffffffffffffU;
1171 #endif
1172
1173 return r;
1174 }
1175
1176 /* converts an ieee double/binary64 to a double */
1177 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1178 ecb_function_ double
1179 ecb_binary64_to_double (uint64_t x)
1180 {
1181 double r;
1182
1183 #if ECB_STDFP
1184 memcpy (&r, &x, 8);
1185 #else
1186 /* emulation, only works for normals and subnormals and +0 */
1187 int neg = x >> 63;
1188 int e = (x >> 52) & 0x7ffU;
1189
1190 x &= 0xfffffffffffffU;
1191
1192 if (e)
1193 x |= 0x10000000000000U;
1194 else
1195 e = 1;
1196
1197 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1198 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1199
1200 r = neg ? -r : r;
1201 #endif
1202
1203 return r;
1204 }
1205
1206#endif
1207
1208#endif
1209
1210/* ECB.H END */
1211
1212#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1213/* if your architecture doesn't need memory fences, e.g. because it is
1214 * single-cpu/core, or if you use libev in a project that doesn't use libev
1215 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1216 * libev, in which cases the memory fences become nops.
1217 * alternatively, you can remove this #error and link against libpthread,
1218 * which will then provide the memory fences.
1219 */
1220# error "memory fences not defined for your architecture, please report"
1221#endif
1222
1223#ifndef ECB_MEMORY_FENCE
1224# define ECB_MEMORY_FENCE do { } while (0)
1225# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1226# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1227#endif
572 1228
573#define expect_false(cond) ecb_expect_false (cond) 1229#define expect_false(cond) ecb_expect_false (cond)
574#define expect_true(cond) ecb_expect_true (cond) 1230#define expect_true(cond) ecb_expect_true (cond)
575#define noinline ecb_noinline 1231#define noinline ecb_noinline
576 1232
… …
722{ 1378{
723 write (STDERR_FILENO, msg, strlen (msg)); 1379 write (STDERR_FILENO, msg, strlen (msg));
724} 1380}
725#endif 1381#endif
726 1382
727static void (*syserr_cb)(const char *msg); 1383static void (*syserr_cb)(const char *msg) EV_THROW;
728 1384
729void ecb_cold 1385void ecb_cold
730ev_set_syserr_cb (void (*cb)(const char *msg)) 1386ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
731{ 1387{
732 syserr_cb = cb; 1388 syserr_cb = cb;
733} 1389}
734 1390
735static void noinline ecb_cold 1391static void noinline ecb_cold
… …
753 abort (); 1409 abort ();
754 } 1410 }
755} 1411}
756 1412
757static void * 1413static void *
758ev_realloc_emul (void *ptr, long size) 1414ev_realloc_emul (void *ptr, long size) EV_THROW
759{ 1415{
760#if __GLIBC__
761 return realloc (ptr, size);
762#else
763 /* some systems, notably openbsd and darwin, fail to properly 1416 /* some systems, notably openbsd and darwin, fail to properly
764 * implement realloc (x, 0) (as required by both ansi c-89 and 1417 * implement realloc (x, 0) (as required by both ansi c-89 and
765 * the single unix specification, so work around them here. 1418 * the single unix specification, so work around them here.
1419 * recently, also (at least) fedora and debian started breaking it,
1420 * despite documenting it otherwise.
766 */ 1421 */
767 1422
768 if (size) 1423 if (size)
769 return realloc (ptr, size); 1424 return realloc (ptr, size);
770 1425
771 free (ptr); 1426 free (ptr);
772 return 0; 1427 return 0;
773#endif
774} 1428}
775 1429
776static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1430static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
777 1431
778void ecb_cold 1432void ecb_cold
779ev_set_allocator (void *(*cb)(void *ptr, long size)) 1433ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
780{ 1434{
781 alloc = cb; 1435 alloc = cb;
782} 1436}
783 1437
784inline_speed void * 1438inline_speed void *
… …
872 #undef VAR 1526 #undef VAR
873 }; 1527 };
874 #include "ev_wrap.h" 1528 #include "ev_wrap.h"
875 1529
876 static struct ev_loop default_loop_struct; 1530 static struct ev_loop default_loop_struct;
877 struct ev_loop *ev_default_loop_ptr; 1531 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
878 1532
879#else 1533#else
880 1534
881 ev_tstamp ev_rt_now; 1535 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
882 #define VAR(name,decl) static decl; 1536 #define VAR(name,decl) static decl;
883 #include "ev_vars.h" 1537 #include "ev_vars.h"
884 #undef VAR 1538 #undef VAR
885 1539
886 static int ev_default_loop_ptr; 1540 static int ev_default_loop_ptr;
… …
901 1555
902/*****************************************************************************/ 1556/*****************************************************************************/
903 1557
904#ifndef EV_HAVE_EV_TIME 1558#ifndef EV_HAVE_EV_TIME
905ev_tstamp 1559ev_tstamp
906ev_time (void) 1560ev_time (void) EV_THROW
907{ 1561{
908#if EV_USE_REALTIME 1562#if EV_USE_REALTIME
909 if (expect_true (have_realtime)) 1563 if (expect_true (have_realtime))
910 { 1564 {
911 struct timespec ts; 1565 struct timespec ts;
… …
935 return ev_time (); 1589 return ev_time ();
936} 1590}
937 1591
938#if EV_MULTIPLICITY 1592#if EV_MULTIPLICITY
939ev_tstamp 1593ev_tstamp
940ev_now (EV_P) 1594ev_now (EV_P) EV_THROW
941{ 1595{
942 return ev_rt_now; 1596 return ev_rt_now;
943} 1597}
944#endif 1598#endif
945 1599
946void 1600void
947ev_sleep (ev_tstamp delay) 1601ev_sleep (ev_tstamp delay) EV_THROW
948{ 1602{
949 if (delay > 0.) 1603 if (delay > 0.)
950 { 1604 {
951#if EV_USE_NANOSLEEP 1605#if EV_USE_NANOSLEEP
952 struct timespec ts; 1606 struct timespec ts;
953 1607
954 EV_TS_SET (ts, delay); 1608 EV_TS_SET (ts, delay);
955 nanosleep (&ts, 0); 1609 nanosleep (&ts, 0);
956#elif defined(_WIN32) 1610#elif defined _WIN32
957 Sleep ((unsigned long)(delay * 1e3)); 1611 Sleep ((unsigned long)(delay * 1e3));
958#else 1612#else
959 struct timeval tv; 1613 struct timeval tv;
960 1614
961 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1615 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
980 1634
981 do 1635 do
982 ncur <<= 1; 1636 ncur <<= 1;
983 while (cnt > ncur); 1637 while (cnt > ncur);
984 1638
985 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1639 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
986 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1640 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
987 { 1641 {
988 ncur *= elem; 1642 ncur *= elem;
989 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
990 ncur = ncur - sizeof (void *) * 4; 1644 ncur = ncur - sizeof (void *) * 4;
… …
1033pendingcb (EV_P_ ev_prepare *w, int revents) 1687pendingcb (EV_P_ ev_prepare *w, int revents)
1034{ 1688{
1035} 1689}
1036 1690
1037void noinline 1691void noinline
1038ev_feed_event (EV_P_ void *w, int revents) 1692ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1039{ 1693{
1040 W w_ = (W)w; 1694 W w_ = (W)w;
1041 int pri = ABSPRI (w_); 1695 int pri = ABSPRI (w_);
1042 1696
1043 if (expect_false (w_->pending)) 1697 if (expect_false (w_->pending))
… …
1047 w_->pending = ++pendingcnt [pri]; 1701 w_->pending = ++pendingcnt [pri];
1048 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1702 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1049 pendings [pri][w_->pending - 1].w = w_; 1703 pendings [pri][w_->pending - 1].w = w_;
1050 pendings [pri][w_->pending - 1].events = revents; 1704 pendings [pri][w_->pending - 1].events = revents;
1051 } 1705 }
1706
1707 pendingpri = NUMPRI - 1;
1052} 1708}
1053 1709
1054inline_speed void 1710inline_speed void
1055feed_reverse (EV_P_ W w) 1711feed_reverse (EV_P_ W w)
1056{ 1712{
… …
1102 if (expect_true (!anfd->reify)) 1758 if (expect_true (!anfd->reify))
1103 fd_event_nocheck (EV_A_ fd, revents); 1759 fd_event_nocheck (EV_A_ fd, revents);
1104} 1760}
1105 1761
1106void 1762void
1107ev_feed_fd_event (EV_P_ int fd, int revents) 1763ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1108{ 1764{
1109 if (fd >= 0 && fd < anfdmax) 1765 if (fd >= 0 && fd < anfdmax)
1110 fd_event_nocheck (EV_A_ fd, revents); 1766 fd_event_nocheck (EV_A_ fd, revents);
1111} 1767}
1112 1768
… …
1431static void noinline ecb_cold 2087static void noinline ecb_cold
1432evpipe_init (EV_P) 2088evpipe_init (EV_P)
1433{ 2089{
1434 if (!ev_is_active (&pipe_w)) 2090 if (!ev_is_active (&pipe_w))
1435 { 2091 {
2092 int fds [2];
2093
1436# if EV_USE_EVENTFD 2094# if EV_USE_EVENTFD
2095 fds [0] = -1;
1437 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2096 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1438 if (evfd < 0 && errno == EINVAL) 2097 if (fds [1] < 0 && errno == EINVAL)
1439 evfd = eventfd (0, 0); 2098 fds [1] = eventfd (0, 0);
1440 2099
1441 if (evfd >= 0) 2100 if (fds [1] < 0)
2101# endif
1442 { 2102 {
2103 while (pipe (fds))
2104 ev_syserr ("(libev) error creating signal/async pipe");
2105
2106 fd_intern (fds [0]);
2107 }
2108
1443 evpipe [0] = -1; 2109 evpipe [0] = fds [0];
1444 fd_intern (evfd); /* doing it twice doesn't hurt */ 2110
1445 ev_io_set (&pipe_w, evfd, EV_READ); 2111 if (evpipe [1] < 0)
2112 evpipe [1] = fds [1]; /* first call, set write fd */
2113 else
2114 {
2115 /* on subsequent calls, do not change evpipe [1] */
2116 /* so that evpipe_write can always rely on its value. */
2117 /* this branch does not do anything sensible on windows, */
2118 /* so must not be executed on windows */
2119
2120 dup2 (fds [1], evpipe [1]);
2121 close (fds [1]);
2122 }
2123
2124 fd_intern (evpipe [1]);
2125
2126 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2127 ev_io_start (EV_A_ &pipe_w);
2128 ev_unref (EV_A); /* watcher should not keep loop alive */
2129 }
2130}
2131
2132inline_speed void
2133evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2134{
2135 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2136
2137 if (expect_true (*flag))
2138 return;
2139
2140 *flag = 1;
2141 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2142
2143 pipe_write_skipped = 1;
2144
2145 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2146
2147 if (pipe_write_wanted)
2148 {
2149 int old_errno;
2150
2151 pipe_write_skipped = 0;
2152 ECB_MEMORY_FENCE_RELEASE;
2153
2154 old_errno = errno; /* save errno because write will clobber it */
2155
2156#if EV_USE_EVENTFD
2157 if (evpipe [0] < 0)
2158 {
2159 uint64_t counter = 1;
2160 write (evpipe [1], &counter, sizeof (uint64_t));
1446 } 2161 }
1447 else 2162 else
1448# endif 2163#endif
1449 { 2164 {
1450 while (pipe (evpipe)) 2165#ifdef _WIN32
1451 ev_syserr ("(libev) error creating signal/async pipe"); 2166 WSABUF buf;
1452 2167 DWORD sent;
1453 fd_intern (evpipe [0]); 2168 buf.buf = &buf;
1454 fd_intern (evpipe [1]); 2169 buf.len = 1;
1455 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2170 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1456 } 2171#else
1457
1458 ev_io_start (EV_A_ &pipe_w);
1459 ev_unref (EV_A); /* watcher should not keep loop alive */
1460 }
1461}
1462
1463inline_speed void
1464evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1465{
1466 if (expect_true (*flag))
1467 return;
1468
1469 *flag = 1;
1470
1471 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1472
1473 pipe_write_skipped = 1;
1474
1475 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1476
1477 if (pipe_write_wanted)
1478 {
1479 int old_errno;
1480
1481 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1482
1483 old_errno = errno; /* save errno because write will clobber it */
1484
1485#if EV_USE_EVENTFD
1486 if (evfd >= 0)
1487 {
1488 uint64_t counter = 1;
1489 write (evfd, &counter, sizeof (uint64_t));
1490 }
1491 else
1492#endif
1493 {
1494 /* win32 people keep sending patches that change this write() to send() */
1495 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1496 /* so when you think this write should be a send instead, please find out */
1497 /* where your send() is from - it's definitely not the microsoft send, and */
1498 /* tell me. thank you. */
1499 write (evpipe [1], &(evpipe [1]), 1); 2172 write (evpipe [1], &(evpipe [1]), 1);
2173#endif
1500 } 2174 }
1501 2175
1502 errno = old_errno; 2176 errno = old_errno;
1503 } 2177 }
1504} 2178}
… …
1511 int i; 2185 int i;
1512 2186
1513 if (revents & EV_READ) 2187 if (revents & EV_READ)
1514 { 2188 {
1515#if EV_USE_EVENTFD 2189#if EV_USE_EVENTFD
1516 if (evfd >= 0) 2190 if (evpipe [0] < 0)
1517 { 2191 {
1518 uint64_t counter; 2192 uint64_t counter;
1519 read (evfd, &counter, sizeof (uint64_t)); 2193 read (evpipe [1], &counter, sizeof (uint64_t));
1520 } 2194 }
1521 else 2195 else
1522#endif 2196#endif
1523 { 2197 {
1524 char dummy; 2198 char dummy[4];
1525 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2199#ifdef _WIN32
2200 WSABUF buf;
2201 DWORD recvd;
2202 DWORD flags = 0;
2203 buf.buf = dummy;
2204 buf.len = sizeof (dummy);
2205 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2206#else
1526 read (evpipe [0], &dummy, 1); 2207 read (evpipe [0], &dummy, sizeof (dummy));
2208#endif
1527 } 2209 }
1528 } 2210 }
1529 2211
1530 pipe_write_skipped = 0; 2212 pipe_write_skipped = 0;
2213
2214 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1531 2215
1532#if EV_SIGNAL_ENABLE 2216#if EV_SIGNAL_ENABLE
1533 if (sig_pending) 2217 if (sig_pending)
1534 { 2218 {
1535 sig_pending = 0; 2219 sig_pending = 0;
2220
2221 ECB_MEMORY_FENCE;
1536 2222
1537 for (i = EV_NSIG - 1; i--; ) 2223 for (i = EV_NSIG - 1; i--; )
1538 if (expect_false (signals [i].pending)) 2224 if (expect_false (signals [i].pending))
1539 ev_feed_signal_event (EV_A_ i + 1); 2225 ev_feed_signal_event (EV_A_ i + 1);
1540 } 2226 }
… …
1542 2228
1543#if EV_ASYNC_ENABLE 2229#if EV_ASYNC_ENABLE
1544 if (async_pending) 2230 if (async_pending)
1545 { 2231 {
1546 async_pending = 0; 2232 async_pending = 0;
2233
2234 ECB_MEMORY_FENCE;
1547 2235
1548 for (i = asynccnt; i--; ) 2236 for (i = asynccnt; i--; )
1549 if (asyncs [i]->sent) 2237 if (asyncs [i]->sent)
1550 { 2238 {
1551 asyncs [i]->sent = 0; 2239 asyncs [i]->sent = 0;
2240 ECB_MEMORY_FENCE_RELEASE;
1552 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2241 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1553 } 2242 }
1554 } 2243 }
1555#endif 2244#endif
1556} 2245}
1557 2246
1558/*****************************************************************************/ 2247/*****************************************************************************/
1559 2248
1560void 2249void
1561ev_feed_signal (int signum) 2250ev_feed_signal (int signum) EV_THROW
1562{ 2251{
1563#if EV_MULTIPLICITY 2252#if EV_MULTIPLICITY
2253 EV_P;
2254 ECB_MEMORY_FENCE_ACQUIRE;
1564 EV_P = signals [signum - 1].loop; 2255 EV_A = signals [signum - 1].loop;
1565 2256
1566 if (!EV_A) 2257 if (!EV_A)
1567 return; 2258 return;
1568#endif 2259#endif
1569 2260
1570 if (!ev_active (&pipe_w))
1571 return;
1572
1573 signals [signum - 1].pending = 1; 2261 signals [signum - 1].pending = 1;
1574 evpipe_write (EV_A_ &sig_pending); 2262 evpipe_write (EV_A_ &sig_pending);
1575} 2263}
1576 2264
1577static void 2265static void
… …
1583 2271
1584 ev_feed_signal (signum); 2272 ev_feed_signal (signum);
1585} 2273}
1586 2274
1587void noinline 2275void noinline
1588ev_feed_signal_event (EV_P_ int signum) 2276ev_feed_signal_event (EV_P_ int signum) EV_THROW
1589{ 2277{
1590 WL w; 2278 WL w;
1591 2279
1592 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2280 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1593 return; 2281 return;
1594 2282
1595 --signum; 2283 --signum;
1596 2284
1597#if EV_MULTIPLICITY 2285#if EV_MULTIPLICITY
… …
1601 if (expect_false (signals [signum].loop != EV_A)) 2289 if (expect_false (signals [signum].loop != EV_A))
1602 return; 2290 return;
1603#endif 2291#endif
1604 2292
1605 signals [signum].pending = 0; 2293 signals [signum].pending = 0;
2294 ECB_MEMORY_FENCE_RELEASE;
1606 2295
1607 for (w = signals [signum].head; w; w = w->next) 2296 for (w = signals [signum].head; w; w = w->next)
1608 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2297 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1609} 2298}
1610 2299
… …
1709#if EV_USE_SELECT 2398#if EV_USE_SELECT
1710# include "ev_select.c" 2399# include "ev_select.c"
1711#endif 2400#endif
1712 2401
1713int ecb_cold 2402int ecb_cold
1714ev_version_major (void) 2403ev_version_major (void) EV_THROW
1715{ 2404{
1716 return EV_VERSION_MAJOR; 2405 return EV_VERSION_MAJOR;
1717} 2406}
1718 2407
1719int ecb_cold 2408int ecb_cold
1720ev_version_minor (void) 2409ev_version_minor (void) EV_THROW
1721{ 2410{
1722 return EV_VERSION_MINOR; 2411 return EV_VERSION_MINOR;
1723} 2412}
1724 2413
1725/* return true if we are running with elevated privileges and should ignore env variables */ 2414/* return true if we are running with elevated privileges and should ignore env variables */
… …
1733 || getgid () != getegid (); 2422 || getgid () != getegid ();
1734#endif 2423#endif
1735} 2424}
1736 2425
1737unsigned int ecb_cold 2426unsigned int ecb_cold
1738ev_supported_backends (void) 2427ev_supported_backends (void) EV_THROW
1739{ 2428{
1740 unsigned int flags = 0; 2429 unsigned int flags = 0;
1741 2430
1742 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2431 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1743 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2432 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1747 2436
1748 return flags; 2437 return flags;
1749} 2438}
1750 2439
1751unsigned int ecb_cold 2440unsigned int ecb_cold
1752ev_recommended_backends (void) 2441ev_recommended_backends (void) EV_THROW
1753{ 2442{
1754 unsigned int flags = ev_supported_backends (); 2443 unsigned int flags = ev_supported_backends ();
1755 2444
1756#ifndef __NetBSD__ 2445#ifndef __NetBSD__
1757 /* kqueue is borked on everything but netbsd apparently */ 2446 /* kqueue is borked on everything but netbsd apparently */
… …
1769 2458
1770 return flags; 2459 return flags;
1771} 2460}
1772 2461
1773unsigned int ecb_cold 2462unsigned int ecb_cold
1774ev_embeddable_backends (void) 2463ev_embeddable_backends (void) EV_THROW
1775{ 2464{
1776 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2465 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1777 2466
1778 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2467 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1779 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2468 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1781 2470
1782 return flags; 2471 return flags;
1783} 2472}
1784 2473
1785unsigned int 2474unsigned int
1786ev_backend (EV_P) 2475ev_backend (EV_P) EV_THROW
1787{ 2476{
1788 return backend; 2477 return backend;
1789} 2478}
1790 2479
1791#if EV_FEATURE_API 2480#if EV_FEATURE_API
1792unsigned int 2481unsigned int
1793ev_iteration (EV_P) 2482ev_iteration (EV_P) EV_THROW
1794{ 2483{
1795 return loop_count; 2484 return loop_count;
1796} 2485}
1797 2486
1798unsigned int 2487unsigned int
1799ev_depth (EV_P) 2488ev_depth (EV_P) EV_THROW
1800{ 2489{
1801 return loop_depth; 2490 return loop_depth;
1802} 2491}
1803 2492
1804void 2493void
1805ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2494ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1806{ 2495{
1807 io_blocktime = interval; 2496 io_blocktime = interval;
1808} 2497}
1809 2498
1810void 2499void
1811ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2500ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1812{ 2501{
1813 timeout_blocktime = interval; 2502 timeout_blocktime = interval;
1814} 2503}
1815 2504
1816void 2505void
1817ev_set_userdata (EV_P_ void *data) 2506ev_set_userdata (EV_P_ void *data) EV_THROW
1818{ 2507{
1819 userdata = data; 2508 userdata = data;
1820} 2509}
1821 2510
1822void * 2511void *
1823ev_userdata (EV_P) 2512ev_userdata (EV_P) EV_THROW
1824{ 2513{
1825 return userdata; 2514 return userdata;
1826} 2515}
1827 2516
1828void 2517void
1829ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2518ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1830{ 2519{
1831 invoke_cb = invoke_pending_cb; 2520 invoke_cb = invoke_pending_cb;
1832} 2521}
1833 2522
1834void 2523void
1835ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2524ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1836{ 2525{
1837 release_cb = release; 2526 release_cb = release;
1838 acquire_cb = acquire; 2527 acquire_cb = acquire;
1839} 2528}
1840#endif 2529#endif
1841 2530
1842/* initialise a loop structure, must be zero-initialised */ 2531/* initialise a loop structure, must be zero-initialised */
1843static void noinline ecb_cold 2532static void noinline ecb_cold
1844loop_init (EV_P_ unsigned int flags) 2533loop_init (EV_P_ unsigned int flags) EV_THROW
1845{ 2534{
1846 if (!backend) 2535 if (!backend)
1847 { 2536 {
1848 origflags = flags; 2537 origflags = flags;
1849 2538
… …
1894#if EV_ASYNC_ENABLE 2583#if EV_ASYNC_ENABLE
1895 async_pending = 0; 2584 async_pending = 0;
1896#endif 2585#endif
1897 pipe_write_skipped = 0; 2586 pipe_write_skipped = 0;
1898 pipe_write_wanted = 0; 2587 pipe_write_wanted = 0;
2588 evpipe [0] = -1;
2589 evpipe [1] = -1;
1899#if EV_USE_INOTIFY 2590#if EV_USE_INOTIFY
1900 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2591 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1901#endif 2592#endif
1902#if EV_USE_SIGNALFD 2593#if EV_USE_SIGNALFD
1903 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2594 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
… …
1954 EV_INVOKE_PENDING; 2645 EV_INVOKE_PENDING;
1955 } 2646 }
1956#endif 2647#endif
1957 2648
1958#if EV_CHILD_ENABLE 2649#if EV_CHILD_ENABLE
1959 if (ev_is_active (&childev)) 2650 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1960 { 2651 {
1961 ev_ref (EV_A); /* child watcher */ 2652 ev_ref (EV_A); /* child watcher */
1962 ev_signal_stop (EV_A_ &childev); 2653 ev_signal_stop (EV_A_ &childev);
1963 } 2654 }
1964#endif 2655#endif
… …
1966 if (ev_is_active (&pipe_w)) 2657 if (ev_is_active (&pipe_w))
1967 { 2658 {
1968 /*ev_ref (EV_A);*/ 2659 /*ev_ref (EV_A);*/
1969 /*ev_io_stop (EV_A_ &pipe_w);*/ 2660 /*ev_io_stop (EV_A_ &pipe_w);*/
1970 2661
1971#if EV_USE_EVENTFD
1972 if (evfd >= 0)
1973 close (evfd);
1974#endif
1975
1976 if (evpipe [0] >= 0)
1977 {
1978 EV_WIN32_CLOSE_FD (evpipe [0]); 2662 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1979 EV_WIN32_CLOSE_FD (evpipe [1]); 2663 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1980 }
1981 } 2664 }
1982 2665
1983#if EV_USE_SIGNALFD 2666#if EV_USE_SIGNALFD
1984 if (ev_is_active (&sigfd_w)) 2667 if (ev_is_active (&sigfd_w))
1985 close (sigfd); 2668 close (sigfd);
… …
2071#endif 2754#endif
2072#if EV_USE_INOTIFY 2755#if EV_USE_INOTIFY
2073 infy_fork (EV_A); 2756 infy_fork (EV_A);
2074#endif 2757#endif
2075 2758
2759#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2076 if (ev_is_active (&pipe_w)) 2760 if (ev_is_active (&pipe_w))
2077 { 2761 {
2078 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 2762 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2079 2763
2080 ev_ref (EV_A); 2764 ev_ref (EV_A);
2081 ev_io_stop (EV_A_ &pipe_w); 2765 ev_io_stop (EV_A_ &pipe_w);
2082 2766
2083#if EV_USE_EVENTFD
2084 if (evfd >= 0)
2085 close (evfd);
2086#endif
2087
2088 if (evpipe [0] >= 0) 2767 if (evpipe [0] >= 0)
2089 {
2090 EV_WIN32_CLOSE_FD (evpipe [0]); 2768 EV_WIN32_CLOSE_FD (evpipe [0]);
2091 EV_WIN32_CLOSE_FD (evpipe [1]);
2092 }
2093 2769
2094#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2095 evpipe_init (EV_A); 2770 evpipe_init (EV_A);
2096 /* now iterate over everything, in case we missed something */ 2771 /* iterate over everything, in case we missed something before */
2097 pipecb (EV_A_ &pipe_w, EV_READ); 2772 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2098#endif
2099 } 2773 }
2774#endif
2100 2775
2101 postfork = 0; 2776 postfork = 0;
2102} 2777}
2103 2778
2104#if EV_MULTIPLICITY 2779#if EV_MULTIPLICITY
2105 2780
2106struct ev_loop * ecb_cold 2781struct ev_loop * ecb_cold
2107ev_loop_new (unsigned int flags) 2782ev_loop_new (unsigned int flags) EV_THROW
2108{ 2783{
2109 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2784 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2110 2785
2111 memset (EV_A, 0, sizeof (struct ev_loop)); 2786 memset (EV_A, 0, sizeof (struct ev_loop));
2112 loop_init (EV_A_ flags); 2787 loop_init (EV_A_ flags);
… …
2156} 2831}
2157#endif 2832#endif
2158 2833
2159#if EV_FEATURE_API 2834#if EV_FEATURE_API
2160void ecb_cold 2835void ecb_cold
2161ev_verify (EV_P) 2836ev_verify (EV_P) EV_THROW
2162{ 2837{
2163#if EV_VERIFY 2838#if EV_VERIFY
2164 int i; 2839 int i;
2165 WL w; 2840 WL w, w2;
2166 2841
2167 assert (activecnt >= -1); 2842 assert (activecnt >= -1);
2168 2843
2169 assert (fdchangemax >= fdchangecnt); 2844 assert (fdchangemax >= fdchangecnt);
2170 for (i = 0; i < fdchangecnt; ++i) 2845 for (i = 0; i < fdchangecnt; ++i)
2171 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2846 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2172 2847
2173 assert (anfdmax >= 0); 2848 assert (anfdmax >= 0);
2174 for (i = 0; i < anfdmax; ++i) 2849 for (i = 0; i < anfdmax; ++i)
2850 {
2851 int j = 0;
2852
2175 for (w = anfds [i].head; w; w = w->next) 2853 for (w = w2 = anfds [i].head; w; w = w->next)
2176 { 2854 {
2177 verify_watcher (EV_A_ (W)w); 2855 verify_watcher (EV_A_ (W)w);
2856
2857 if (j++ & 1)
2858 {
2859 assert (("libev: io watcher list contains a loop", w != w2));
2860 w2 = w2->next;
2861 }
2862
2178 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2863 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2179 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2864 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2180 } 2865 }
2866 }
2181 2867
2182 assert (timermax >= timercnt); 2868 assert (timermax >= timercnt);
2183 verify_heap (EV_A_ timers, timercnt); 2869 verify_heap (EV_A_ timers, timercnt);
2184 2870
2185#if EV_PERIODIC_ENABLE 2871#if EV_PERIODIC_ENABLE
… …
2235#if EV_MULTIPLICITY 2921#if EV_MULTIPLICITY
2236struct ev_loop * ecb_cold 2922struct ev_loop * ecb_cold
2237#else 2923#else
2238int 2924int
2239#endif 2925#endif
2240ev_default_loop (unsigned int flags) 2926ev_default_loop (unsigned int flags) EV_THROW
2241{ 2927{
2242 if (!ev_default_loop_ptr) 2928 if (!ev_default_loop_ptr)
2243 { 2929 {
2244#if EV_MULTIPLICITY 2930#if EV_MULTIPLICITY
2245 EV_P = ev_default_loop_ptr = &default_loop_struct; 2931 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2264 2950
2265 return ev_default_loop_ptr; 2951 return ev_default_loop_ptr;
2266} 2952}
2267 2953
2268void 2954void
2269ev_loop_fork (EV_P) 2955ev_loop_fork (EV_P) EV_THROW
2270{ 2956{
2271 postfork = 1; /* must be in line with ev_default_fork */ 2957 postfork = 1;
2272} 2958}
2273 2959
2274/*****************************************************************************/ 2960/*****************************************************************************/
2275 2961
2276void 2962void
… …
2278{ 2964{
2279 EV_CB_INVOKE ((W)w, revents); 2965 EV_CB_INVOKE ((W)w, revents);
2280} 2966}
2281 2967
2282unsigned int 2968unsigned int
2283ev_pending_count (EV_P) 2969ev_pending_count (EV_P) EV_THROW
2284{ 2970{
2285 int pri; 2971 int pri;
2286 unsigned int count = 0; 2972 unsigned int count = 0;
2287 2973
2288 for (pri = NUMPRI; pri--; ) 2974 for (pri = NUMPRI; pri--; )
… …
2292} 2978}
2293 2979
2294void noinline 2980void noinline
2295ev_invoke_pending (EV_P) 2981ev_invoke_pending (EV_P)
2296{ 2982{
2297 int pri; 2983 pendingpri = NUMPRI;
2298 2984
2299 for (pri = NUMPRI; pri--; ) 2985 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2986 {
2987 --pendingpri;
2988
2300 while (pendingcnt [pri]) 2989 while (pendingcnt [pendingpri])
2301 { 2990 {
2302 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2991 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2303 2992
2304 p->w->pending = 0; 2993 p->w->pending = 0;
2305 EV_CB_INVOKE (p->w, p->events); 2994 EV_CB_INVOKE (p->w, p->events);
2306 EV_FREQUENT_CHECK; 2995 EV_FREQUENT_CHECK;
2307 } 2996 }
2997 }
2308} 2998}
2309 2999
2310#if EV_IDLE_ENABLE 3000#if EV_IDLE_ENABLE
2311/* make idle watchers pending. this handles the "call-idle */ 3001/* make idle watchers pending. this handles the "call-idle */
2312/* only when higher priorities are idle" logic */ 3002/* only when higher priorities are idle" logic */
… …
2402{ 3092{
2403 EV_FREQUENT_CHECK; 3093 EV_FREQUENT_CHECK;
2404 3094
2405 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3095 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2406 { 3096 {
2407 int feed_count = 0;
2408
2409 do 3097 do
2410 { 3098 {
2411 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3099 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2412 3100
2413 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3101 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2547 3235
2548 mn_now = ev_rt_now; 3236 mn_now = ev_rt_now;
2549 } 3237 }
2550} 3238}
2551 3239
2552void 3240int
2553ev_run (EV_P_ int flags) 3241ev_run (EV_P_ int flags)
2554{ 3242{
2555#if EV_FEATURE_API 3243#if EV_FEATURE_API
2556 ++loop_depth; 3244 ++loop_depth;
2557#endif 3245#endif
… …
2670#endif 3358#endif
2671 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3359 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2672 backend_poll (EV_A_ waittime); 3360 backend_poll (EV_A_ waittime);
2673 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3361 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2674 3362
2675 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */ 3363 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2676 3364
3365 ECB_MEMORY_FENCE_ACQUIRE;
2677 if (pipe_write_skipped) 3366 if (pipe_write_skipped)
2678 { 3367 {
2679 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); 3368 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2680 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3369 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2681 } 3370 }
… …
2714 loop_done = EVBREAK_CANCEL; 3403 loop_done = EVBREAK_CANCEL;
2715 3404
2716#if EV_FEATURE_API 3405#if EV_FEATURE_API
2717 --loop_depth; 3406 --loop_depth;
2718#endif 3407#endif
3408
3409 return activecnt;
2719} 3410}
2720 3411
2721void 3412void
2722ev_break (EV_P_ int how) 3413ev_break (EV_P_ int how) EV_THROW
2723{ 3414{
2724 loop_done = how; 3415 loop_done = how;
2725} 3416}
2726 3417
2727void 3418void
2728ev_ref (EV_P) 3419ev_ref (EV_P) EV_THROW
2729{ 3420{
2730 ++activecnt; 3421 ++activecnt;
2731} 3422}
2732 3423
2733void 3424void
2734ev_unref (EV_P) 3425ev_unref (EV_P) EV_THROW
2735{ 3426{
2736 --activecnt; 3427 --activecnt;
2737} 3428}
2738 3429
2739void 3430void
2740ev_now_update (EV_P) 3431ev_now_update (EV_P) EV_THROW
2741{ 3432{
2742 time_update (EV_A_ 1e100); 3433 time_update (EV_A_ 1e100);
2743} 3434}
2744 3435
2745void 3436void
2746ev_suspend (EV_P) 3437ev_suspend (EV_P) EV_THROW
2747{ 3438{
2748 ev_now_update (EV_A); 3439 ev_now_update (EV_A);
2749} 3440}
2750 3441
2751void 3442void
2752ev_resume (EV_P) 3443ev_resume (EV_P) EV_THROW
2753{ 3444{
2754 ev_tstamp mn_prev = mn_now; 3445 ev_tstamp mn_prev = mn_now;
2755 3446
2756 ev_now_update (EV_A); 3447 ev_now_update (EV_A);
2757 timers_reschedule (EV_A_ mn_now - mn_prev); 3448 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2796 w->pending = 0; 3487 w->pending = 0;
2797 } 3488 }
2798} 3489}
2799 3490
2800int 3491int
2801ev_clear_pending (EV_P_ void *w) 3492ev_clear_pending (EV_P_ void *w) EV_THROW
2802{ 3493{
2803 W w_ = (W)w; 3494 W w_ = (W)w;
2804 int pending = w_->pending; 3495 int pending = w_->pending;
2805 3496
2806 if (expect_true (pending)) 3497 if (expect_true (pending))
… …
2839} 3530}
2840 3531
2841/*****************************************************************************/ 3532/*****************************************************************************/
2842 3533
2843void noinline 3534void noinline
2844ev_io_start (EV_P_ ev_io *w) 3535ev_io_start (EV_P_ ev_io *w) EV_THROW
2845{ 3536{
2846 int fd = w->fd; 3537 int fd = w->fd;
2847 3538
2848 if (expect_false (ev_is_active (w))) 3539 if (expect_false (ev_is_active (w)))
2849 return; 3540 return;
… …
2855 3546
2856 ev_start (EV_A_ (W)w, 1); 3547 ev_start (EV_A_ (W)w, 1);
2857 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3548 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2858 wlist_add (&anfds[fd].head, (WL)w); 3549 wlist_add (&anfds[fd].head, (WL)w);
2859 3550
3551 /* common bug, apparently */
3552 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3553
2860 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3554 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2861 w->events &= ~EV__IOFDSET; 3555 w->events &= ~EV__IOFDSET;
2862 3556
2863 EV_FREQUENT_CHECK; 3557 EV_FREQUENT_CHECK;
2864} 3558}
2865 3559
2866void noinline 3560void noinline
2867ev_io_stop (EV_P_ ev_io *w) 3561ev_io_stop (EV_P_ ev_io *w) EV_THROW
2868{ 3562{
2869 clear_pending (EV_A_ (W)w); 3563 clear_pending (EV_A_ (W)w);
2870 if (expect_false (!ev_is_active (w))) 3564 if (expect_false (!ev_is_active (w)))
2871 return; 3565 return;
2872 3566
… …
2881 3575
2882 EV_FREQUENT_CHECK; 3576 EV_FREQUENT_CHECK;
2883} 3577}
2884 3578
2885void noinline 3579void noinline
2886ev_timer_start (EV_P_ ev_timer *w) 3580ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2887{ 3581{
2888 if (expect_false (ev_is_active (w))) 3582 if (expect_false (ev_is_active (w)))
2889 return; 3583 return;
2890 3584
2891 ev_at (w) += mn_now; 3585 ev_at (w) += mn_now;
… …
2905 3599
2906 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3600 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2907} 3601}
2908 3602
2909void noinline 3603void noinline
2910ev_timer_stop (EV_P_ ev_timer *w) 3604ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2911{ 3605{
2912 clear_pending (EV_A_ (W)w); 3606 clear_pending (EV_A_ (W)w);
2913 if (expect_false (!ev_is_active (w))) 3607 if (expect_false (!ev_is_active (w)))
2914 return; 3608 return;
2915 3609
… …
2935 3629
2936 EV_FREQUENT_CHECK; 3630 EV_FREQUENT_CHECK;
2937} 3631}
2938 3632
2939void noinline 3633void noinline
2940ev_timer_again (EV_P_ ev_timer *w) 3634ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2941{ 3635{
2942 EV_FREQUENT_CHECK; 3636 EV_FREQUENT_CHECK;
3637
3638 clear_pending (EV_A_ (W)w);
2943 3639
2944 if (ev_is_active (w)) 3640 if (ev_is_active (w))
2945 { 3641 {
2946 if (w->repeat) 3642 if (w->repeat)
2947 { 3643 {
… …
2960 3656
2961 EV_FREQUENT_CHECK; 3657 EV_FREQUENT_CHECK;
2962} 3658}
2963 3659
2964ev_tstamp 3660ev_tstamp
2965ev_timer_remaining (EV_P_ ev_timer *w) 3661ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2966{ 3662{
2967 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3663 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2968} 3664}
2969 3665
2970#if EV_PERIODIC_ENABLE 3666#if EV_PERIODIC_ENABLE
2971void noinline 3667void noinline
2972ev_periodic_start (EV_P_ ev_periodic *w) 3668ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2973{ 3669{
2974 if (expect_false (ev_is_active (w))) 3670 if (expect_false (ev_is_active (w)))
2975 return; 3671 return;
2976 3672
2977 if (w->reschedule_cb) 3673 if (w->reschedule_cb)
… …
2997 3693
2998 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3694 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2999} 3695}
3000 3696
3001void noinline 3697void noinline
3002ev_periodic_stop (EV_P_ ev_periodic *w) 3698ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3003{ 3699{
3004 clear_pending (EV_A_ (W)w); 3700 clear_pending (EV_A_ (W)w);
3005 if (expect_false (!ev_is_active (w))) 3701 if (expect_false (!ev_is_active (w)))
3006 return; 3702 return;
3007 3703
… …
3025 3721
3026 EV_FREQUENT_CHECK; 3722 EV_FREQUENT_CHECK;
3027} 3723}
3028 3724
3029void noinline 3725void noinline
3030ev_periodic_again (EV_P_ ev_periodic *w) 3726ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3031{ 3727{
3032 /* TODO: use adjustheap and recalculation */ 3728 /* TODO: use adjustheap and recalculation */
3033 ev_periodic_stop (EV_A_ w); 3729 ev_periodic_stop (EV_A_ w);
3034 ev_periodic_start (EV_A_ w); 3730 ev_periodic_start (EV_A_ w);
3035} 3731}
… …
3040#endif 3736#endif
3041 3737
3042#if EV_SIGNAL_ENABLE 3738#if EV_SIGNAL_ENABLE
3043 3739
3044void noinline 3740void noinline
3045ev_signal_start (EV_P_ ev_signal *w) 3741ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3046{ 3742{
3047 if (expect_false (ev_is_active (w))) 3743 if (expect_false (ev_is_active (w)))
3048 return; 3744 return;
3049 3745
3050 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3746 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
3052#if EV_MULTIPLICITY 3748#if EV_MULTIPLICITY
3053 assert (("libev: a signal must not be attached to two different loops", 3749 assert (("libev: a signal must not be attached to two different loops",
3054 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3750 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3055 3751
3056 signals [w->signum - 1].loop = EV_A; 3752 signals [w->signum - 1].loop = EV_A;
3753 ECB_MEMORY_FENCE_RELEASE;
3057#endif 3754#endif
3058 3755
3059 EV_FREQUENT_CHECK; 3756 EV_FREQUENT_CHECK;
3060 3757
3061#if EV_USE_SIGNALFD 3758#if EV_USE_SIGNALFD
… …
3121 3818
3122 EV_FREQUENT_CHECK; 3819 EV_FREQUENT_CHECK;
3123} 3820}
3124 3821
3125void noinline 3822void noinline
3126ev_signal_stop (EV_P_ ev_signal *w) 3823ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3127{ 3824{
3128 clear_pending (EV_A_ (W)w); 3825 clear_pending (EV_A_ (W)w);
3129 if (expect_false (!ev_is_active (w))) 3826 if (expect_false (!ev_is_active (w)))
3130 return; 3827 return;
3131 3828
… …
3162#endif 3859#endif
3163 3860
3164#if EV_CHILD_ENABLE 3861#if EV_CHILD_ENABLE
3165 3862
3166void 3863void
3167ev_child_start (EV_P_ ev_child *w) 3864ev_child_start (EV_P_ ev_child *w) EV_THROW
3168{ 3865{
3169#if EV_MULTIPLICITY 3866#if EV_MULTIPLICITY
3170 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3867 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3171#endif 3868#endif
3172 if (expect_false (ev_is_active (w))) 3869 if (expect_false (ev_is_active (w)))
… …
3179 3876
3180 EV_FREQUENT_CHECK; 3877 EV_FREQUENT_CHECK;
3181} 3878}
3182 3879
3183void 3880void
3184ev_child_stop (EV_P_ ev_child *w) 3881ev_child_stop (EV_P_ ev_child *w) EV_THROW
3185{ 3882{
3186 clear_pending (EV_A_ (W)w); 3883 clear_pending (EV_A_ (W)w);
3187 if (expect_false (!ev_is_active (w))) 3884 if (expect_false (!ev_is_active (w)))
3188 return; 3885 return;
3189 3886
… …
3216# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3913# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3217 3914
3218static void noinline 3915static void noinline
3219infy_add (EV_P_ ev_stat *w) 3916infy_add (EV_P_ ev_stat *w)
3220{ 3917{
3221 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); 3918 w->wd = inotify_add_watch (fs_fd, w->path,
3919 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3920 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3921 | IN_DONT_FOLLOW | IN_MASK_ADD);
3222 3922
3223 if (w->wd >= 0) 3923 if (w->wd >= 0)
3224 { 3924 {
3225 struct statfs sfs; 3925 struct statfs sfs;
3226 3926
… …
3230 3930
3231 if (!fs_2625) 3931 if (!fs_2625)
3232 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3932 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3233 else if (!statfs (w->path, &sfs) 3933 else if (!statfs (w->path, &sfs)
3234 && (sfs.f_type == 0x1373 /* devfs */ 3934 && (sfs.f_type == 0x1373 /* devfs */
3935 || sfs.f_type == 0x4006 /* fat */
3936 || sfs.f_type == 0x4d44 /* msdos */
3235 || sfs.f_type == 0xEF53 /* ext2/3 */ 3937 || sfs.f_type == 0xEF53 /* ext2/3 */
3938 || sfs.f_type == 0x72b6 /* jffs2 */
3939 || sfs.f_type == 0x858458f6 /* ramfs */
3940 || sfs.f_type == 0x5346544e /* ntfs */
3236 || sfs.f_type == 0x3153464a /* jfs */ 3941 || sfs.f_type == 0x3153464a /* jfs */
3942 || sfs.f_type == 0x9123683e /* btrfs */
3237 || sfs.f_type == 0x52654973 /* reiser3 */ 3943 || sfs.f_type == 0x52654973 /* reiser3 */
3238 || sfs.f_type == 0x01021994 /* tempfs */ 3944 || sfs.f_type == 0x01021994 /* tmpfs */
3239 || sfs.f_type == 0x58465342 /* xfs */)) 3945 || sfs.f_type == 0x58465342 /* xfs */))
3240 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3946 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3241 else 3947 else
3242 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3948 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3243 } 3949 }
… …
3356} 4062}
3357 4063
3358inline_size int 4064inline_size int
3359infy_newfd (void) 4065infy_newfd (void)
3360{ 4066{
3361#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4067#if defined IN_CLOEXEC && defined IN_NONBLOCK
3362 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4068 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3363 if (fd >= 0) 4069 if (fd >= 0)
3364 return fd; 4070 return fd;
3365#endif 4071#endif
3366 return inotify_init (); 4072 return inotify_init ();
… …
3441#else 4147#else
3442# define EV_LSTAT(p,b) lstat (p, b) 4148# define EV_LSTAT(p,b) lstat (p, b)
3443#endif 4149#endif
3444 4150
3445void 4151void
3446ev_stat_stat (EV_P_ ev_stat *w) 4152ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3447{ 4153{
3448 if (lstat (w->path, &w->attr) < 0) 4154 if (lstat (w->path, &w->attr) < 0)
3449 w->attr.st_nlink = 0; 4155 w->attr.st_nlink = 0;
3450 else if (!w->attr.st_nlink) 4156 else if (!w->attr.st_nlink)
3451 w->attr.st_nlink = 1; 4157 w->attr.st_nlink = 1;
… …
3490 ev_feed_event (EV_A_ w, EV_STAT); 4196 ev_feed_event (EV_A_ w, EV_STAT);
3491 } 4197 }
3492} 4198}
3493 4199
3494void 4200void
3495ev_stat_start (EV_P_ ev_stat *w) 4201ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3496{ 4202{
3497 if (expect_false (ev_is_active (w))) 4203 if (expect_false (ev_is_active (w)))
3498 return; 4204 return;
3499 4205
3500 ev_stat_stat (EV_A_ w); 4206 ev_stat_stat (EV_A_ w);
… …
3521 4227
3522 EV_FREQUENT_CHECK; 4228 EV_FREQUENT_CHECK;
3523} 4229}
3524 4230
3525void 4231void
3526ev_stat_stop (EV_P_ ev_stat *w) 4232ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3527{ 4233{
3528 clear_pending (EV_A_ (W)w); 4234 clear_pending (EV_A_ (W)w);
3529 if (expect_false (!ev_is_active (w))) 4235 if (expect_false (!ev_is_active (w)))
3530 return; 4236 return;
3531 4237
… …
3547} 4253}
3548#endif 4254#endif
3549 4255
3550#if EV_IDLE_ENABLE 4256#if EV_IDLE_ENABLE
3551void 4257void
3552ev_idle_start (EV_P_ ev_idle *w) 4258ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3553{ 4259{
3554 if (expect_false (ev_is_active (w))) 4260 if (expect_false (ev_is_active (w)))
3555 return; 4261 return;
3556 4262
3557 pri_adjust (EV_A_ (W)w); 4263 pri_adjust (EV_A_ (W)w);
… …
3570 4276
3571 EV_FREQUENT_CHECK; 4277 EV_FREQUENT_CHECK;
3572} 4278}
3573 4279
3574void 4280void
3575ev_idle_stop (EV_P_ ev_idle *w) 4281ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3576{ 4282{
3577 clear_pending (EV_A_ (W)w); 4283 clear_pending (EV_A_ (W)w);
3578 if (expect_false (!ev_is_active (w))) 4284 if (expect_false (!ev_is_active (w)))
3579 return; 4285 return;
3580 4286
… …
3594} 4300}
3595#endif 4301#endif
3596 4302
3597#if EV_PREPARE_ENABLE 4303#if EV_PREPARE_ENABLE
3598void 4304void
3599ev_prepare_start (EV_P_ ev_prepare *w) 4305ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3600{ 4306{
3601 if (expect_false (ev_is_active (w))) 4307 if (expect_false (ev_is_active (w)))
3602 return; 4308 return;
3603 4309
3604 EV_FREQUENT_CHECK; 4310 EV_FREQUENT_CHECK;
… …
3609 4315
3610 EV_FREQUENT_CHECK; 4316 EV_FREQUENT_CHECK;
3611} 4317}
3612 4318
3613void 4319void
3614ev_prepare_stop (EV_P_ ev_prepare *w) 4320ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3615{ 4321{
3616 clear_pending (EV_A_ (W)w); 4322 clear_pending (EV_A_ (W)w);
3617 if (expect_false (!ev_is_active (w))) 4323 if (expect_false (!ev_is_active (w)))
3618 return; 4324 return;
3619 4325
… …
3632} 4338}
3633#endif 4339#endif
3634 4340
3635#if EV_CHECK_ENABLE 4341#if EV_CHECK_ENABLE
3636void 4342void
3637ev_check_start (EV_P_ ev_check *w) 4343ev_check_start (EV_P_ ev_check *w) EV_THROW
3638{ 4344{
3639 if (expect_false (ev_is_active (w))) 4345 if (expect_false (ev_is_active (w)))
3640 return; 4346 return;
3641 4347
3642 EV_FREQUENT_CHECK; 4348 EV_FREQUENT_CHECK;
… …
3647 4353
3648 EV_FREQUENT_CHECK; 4354 EV_FREQUENT_CHECK;
3649} 4355}
3650 4356
3651void 4357void
3652ev_check_stop (EV_P_ ev_check *w) 4358ev_check_stop (EV_P_ ev_check *w) EV_THROW
3653{ 4359{
3654 clear_pending (EV_A_ (W)w); 4360 clear_pending (EV_A_ (W)w);
3655 if (expect_false (!ev_is_active (w))) 4361 if (expect_false (!ev_is_active (w)))
3656 return; 4362 return;
3657 4363
… …
3670} 4376}
3671#endif 4377#endif
3672 4378
3673#if EV_EMBED_ENABLE 4379#if EV_EMBED_ENABLE
3674void noinline 4380void noinline
3675ev_embed_sweep (EV_P_ ev_embed *w) 4381ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3676{ 4382{
3677 ev_run (w->other, EVRUN_NOWAIT); 4383 ev_run (w->other, EVRUN_NOWAIT);
3678} 4384}
3679 4385
3680static void 4386static void
… …
3728 ev_idle_stop (EV_A_ idle); 4434 ev_idle_stop (EV_A_ idle);
3729} 4435}
3730#endif 4436#endif
3731 4437
3732void 4438void
3733ev_embed_start (EV_P_ ev_embed *w) 4439ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3734{ 4440{
3735 if (expect_false (ev_is_active (w))) 4441 if (expect_false (ev_is_active (w)))
3736 return; 4442 return;
3737 4443
3738 { 4444 {
… …
3759 4465
3760 EV_FREQUENT_CHECK; 4466 EV_FREQUENT_CHECK;
3761} 4467}
3762 4468
3763void 4469void
3764ev_embed_stop (EV_P_ ev_embed *w) 4470ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3765{ 4471{
3766 clear_pending (EV_A_ (W)w); 4472 clear_pending (EV_A_ (W)w);
3767 if (expect_false (!ev_is_active (w))) 4473 if (expect_false (!ev_is_active (w)))
3768 return; 4474 return;
3769 4475
… …
3779} 4485}
3780#endif 4486#endif
3781 4487
3782#if EV_FORK_ENABLE 4488#if EV_FORK_ENABLE
3783void 4489void
3784ev_fork_start (EV_P_ ev_fork *w) 4490ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3785{ 4491{
3786 if (expect_false (ev_is_active (w))) 4492 if (expect_false (ev_is_active (w)))
3787 return; 4493 return;
3788 4494
3789 EV_FREQUENT_CHECK; 4495 EV_FREQUENT_CHECK;
… …
3794 4500
3795 EV_FREQUENT_CHECK; 4501 EV_FREQUENT_CHECK;
3796} 4502}
3797 4503
3798void 4504void
3799ev_fork_stop (EV_P_ ev_fork *w) 4505ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3800{ 4506{
3801 clear_pending (EV_A_ (W)w); 4507 clear_pending (EV_A_ (W)w);
3802 if (expect_false (!ev_is_active (w))) 4508 if (expect_false (!ev_is_active (w)))
3803 return; 4509 return;
3804 4510
… …
3817} 4523}
3818#endif 4524#endif
3819 4525
3820#if EV_CLEANUP_ENABLE 4526#if EV_CLEANUP_ENABLE
3821void 4527void
3822ev_cleanup_start (EV_P_ ev_cleanup *w) 4528ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3823{ 4529{
3824 if (expect_false (ev_is_active (w))) 4530 if (expect_false (ev_is_active (w)))
3825 return; 4531 return;
3826 4532
3827 EV_FREQUENT_CHECK; 4533 EV_FREQUENT_CHECK;
… …
3834 ev_unref (EV_A); 4540 ev_unref (EV_A);
3835 EV_FREQUENT_CHECK; 4541 EV_FREQUENT_CHECK;
3836} 4542}
3837 4543
3838void 4544void
3839ev_cleanup_stop (EV_P_ ev_cleanup *w) 4545ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3840{ 4546{
3841 clear_pending (EV_A_ (W)w); 4547 clear_pending (EV_A_ (W)w);
3842 if (expect_false (!ev_is_active (w))) 4548 if (expect_false (!ev_is_active (w)))
3843 return; 4549 return;
3844 4550
… …
3858} 4564}
3859#endif 4565#endif
3860 4566
3861#if EV_ASYNC_ENABLE 4567#if EV_ASYNC_ENABLE
3862void 4568void
3863ev_async_start (EV_P_ ev_async *w) 4569ev_async_start (EV_P_ ev_async *w) EV_THROW
3864{ 4570{
3865 if (expect_false (ev_is_active (w))) 4571 if (expect_false (ev_is_active (w)))
3866 return; 4572 return;
3867 4573
3868 w->sent = 0; 4574 w->sent = 0;
… …
3877 4583
3878 EV_FREQUENT_CHECK; 4584 EV_FREQUENT_CHECK;
3879} 4585}
3880 4586
3881void 4587void
3882ev_async_stop (EV_P_ ev_async *w) 4588ev_async_stop (EV_P_ ev_async *w) EV_THROW
3883{ 4589{
3884 clear_pending (EV_A_ (W)w); 4590 clear_pending (EV_A_ (W)w);
3885 if (expect_false (!ev_is_active (w))) 4591 if (expect_false (!ev_is_active (w)))
3886 return; 4592 return;
3887 4593
… …
3898 4604
3899 EV_FREQUENT_CHECK; 4605 EV_FREQUENT_CHECK;
3900} 4606}
3901 4607
3902void 4608void
3903ev_async_send (EV_P_ ev_async *w) 4609ev_async_send (EV_P_ ev_async *w) EV_THROW
3904{ 4610{
3905 w->sent = 1; 4611 w->sent = 1;
3906 evpipe_write (EV_A_ &async_pending); 4612 evpipe_write (EV_A_ &async_pending);
3907} 4613}
3908#endif 4614#endif
… …
3945 4651
3946 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4652 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3947} 4653}
3948 4654
3949void 4655void
3950ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4656ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3951{ 4657{
3952 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4658 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3953 4659
3954 if (expect_false (!once)) 4660 if (expect_false (!once))
3955 { 4661 {
… …
3977 4683
3978/*****************************************************************************/ 4684/*****************************************************************************/
3979 4685
3980#if EV_WALK_ENABLE 4686#if EV_WALK_ENABLE
3981void ecb_cold 4687void ecb_cold
3982ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4688ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3983{ 4689{
3984 int i, j; 4690 int i, j;
3985 ev_watcher_list *wl, *wn; 4691 ev_watcher_list *wl, *wn;
3986 4692
3987 if (types & (EV_IO | EV_EMBED)) 4693 if (types & (EV_IO | EV_EMBED))
… …
4030 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4736 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4031#endif 4737#endif
4032 4738
4033#if EV_IDLE_ENABLE 4739#if EV_IDLE_ENABLE
4034 if (types & EV_IDLE) 4740 if (types & EV_IDLE)
4035 for (j = NUMPRI; i--; ) 4741 for (j = NUMPRI; j--; )
4036 for (i = idlecnt [j]; i--; ) 4742 for (i = idlecnt [j]; i--; )
4037 cb (EV_A_ EV_IDLE, idles [j][i]); 4743 cb (EV_A_ EV_IDLE, idles [j][i]);
4038#endif 4744#endif
4039 4745
4040#if EV_FORK_ENABLE 4746#if EV_FORK_ENABLE
… …
4093 4799
4094#if EV_MULTIPLICITY 4800#if EV_MULTIPLICITY
4095 #include "ev_wrap.h" 4801 #include "ev_wrap.h"
4096#endif 4802#endif
4097 4803
4098EV_CPP(})
4099

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