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Comparing libev/ev.c (file contents):
Revision 1.424 by root, Tue May 1 22:01:40 2012 UTC vs.
Revision 1.473 by root, Tue Sep 9 21:51:35 2014 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48#if HAVE_FLOOR 48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR 49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1 50# define EV_USE_FLOOR 1
51# endif
51# endif 52# endif
52#endif
53 53
54# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
201# include <sys/wait.h> 201# include <sys/wait.h>
202# include <unistd.h> 202# include <unistd.h>
203#else 203#else
204# include <io.h> 204# include <io.h>
205# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
206# include <windows.h> 207# include <windows.h>
207# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
208# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
209# endif 210# endif
210# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
240#elif defined SIGARRAYSIZE 241#elif defined SIGARRAYSIZE
241# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
242#elif defined _sys_nsig 243#elif defined _sys_nsig
243# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
244#else 245#else
245# error "unable to find value for NSIG, please report" 246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
246/* to make it compile regardless, just remove the above line, */
247/* but consider reporting it, too! :) */
248# define EV_NSIG 65
249#endif 247#endif
250 248
251#ifndef EV_USE_FLOOR 249#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0 250# define EV_USE_FLOOR 0
253#endif 251#endif
254 252
255#ifndef EV_USE_CLOCK_SYSCALL 253#ifndef EV_USE_CLOCK_SYSCALL
256# if __linux && __GLIBC__ >= 2 254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
258# else 256# else
259# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
258# endif
259#endif
260
261#if !(_POSIX_TIMERS > 0)
262# ifndef EV_USE_MONOTONIC
263# define EV_USE_MONOTONIC 0
264# endif
265# ifndef EV_USE_REALTIME
266# define EV_USE_REALTIME 0
260# endif 267# endif
261#endif 268#endif
262 269
263#ifndef EV_USE_MONOTONIC 270#ifndef EV_USE_MONOTONIC
264# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0 271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
… …
354# define EV_USE_4HEAP EV_FEATURE_DATA 361# define EV_USE_4HEAP EV_FEATURE_DATA
355#endif 362#endif
356 363
357#ifndef EV_HEAP_CACHE_AT 364#ifndef EV_HEAP_CACHE_AT
358# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 365# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
366#endif
367
368#ifdef ANDROID
369/* supposedly, android doesn't typedef fd_mask */
370# undef EV_USE_SELECT
371# define EV_USE_SELECT 0
372/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
373# undef EV_USE_CLOCK_SYSCALL
374# define EV_USE_CLOCK_SYSCALL 0
375#endif
376
377/* aix's poll.h seems to cause lots of trouble */
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
359#endif 382#endif
360 383
361/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 384/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
362/* which makes programs even slower. might work on other unices, too. */ 385/* which makes programs even slower. might work on other unices, too. */
363#if EV_USE_CLOCK_SYSCALL 386#if EV_USE_CLOCK_SYSCALL
… …
372# endif 395# endif
373#endif 396#endif
374 397
375/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 398/* this block fixes any misconfiguration where we know we run into trouble otherwise */
376 399
377#ifdef _AIX
378/* AIX has a completely broken poll.h header */
379# undef EV_USE_POLL
380# define EV_USE_POLL 0
381#endif
382
383#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
384# undef EV_USE_MONOTONIC 401# undef EV_USE_MONOTONIC
385# define EV_USE_MONOTONIC 0 402# define EV_USE_MONOTONIC 0
386#endif 403#endif
387 404
… …
408/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 425/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
409# ifndef IN_DONT_FOLLOW 426# ifndef IN_DONT_FOLLOW
410# undef EV_USE_INOTIFY 427# undef EV_USE_INOTIFY
411# define EV_USE_INOTIFY 0 428# define EV_USE_INOTIFY 0
412# endif 429# endif
413#endif
414
415#if EV_SELECT_IS_WINSOCKET
416# include <winsock.h>
417#endif 430#endif
418 431
419#if EV_USE_EVENTFD 432#if EV_USE_EVENTFD
420/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
421# include <stdint.h> 434# include <stdint.h>
… …
478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ 491/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
479/* ECB.H BEGIN */ 492/* ECB.H BEGIN */
480/* 493/*
481 * libecb - http://software.schmorp.de/pkg/libecb 494 * libecb - http://software.schmorp.de/pkg/libecb
482 * 495 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> 496 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta 497 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved. 498 * All rights reserved.
486 * 499 *
487 * Redistribution and use in source and binary forms, with or without modifica- 500 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met: 501 * tion, are permitted provided that the following conditions are met:
… …
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 515 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 516 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- 517 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
505 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 518 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE. 519 * OF THE POSSIBILITY OF SUCH DAMAGE.
520 *
521 * Alternatively, the contents of this file may be used under the terms of
522 * the GNU General Public License ("GPL") version 2 or any later version,
523 * in which case the provisions of the GPL are applicable instead of
524 * the above. If you wish to allow the use of your version of this file
525 * only under the terms of the GPL and not to allow others to use your
526 * version of this file under the BSD license, indicate your decision
527 * by deleting the provisions above and replace them with the notice
528 * and other provisions required by the GPL. If you do not delete the
529 * provisions above, a recipient may use your version of this file under
530 * either the BSD or the GPL.
507 */ 531 */
508 532
509#ifndef ECB_H 533#ifndef ECB_H
510#define ECB_H 534#define ECB_H
535
536/* 16 bits major, 16 bits minor */
537#define ECB_VERSION 0x00010003
511 538
512#ifdef _WIN32 539#ifdef _WIN32
513 typedef signed char int8_t; 540 typedef signed char int8_t;
514 typedef unsigned char uint8_t; 541 typedef unsigned char uint8_t;
515 typedef signed short int16_t; 542 typedef signed short int16_t;
… …
521 typedef unsigned long long uint64_t; 548 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */ 549 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t; 550 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t; 551 typedef unsigned __int64 uint64_t;
525 #endif 552 #endif
553 #ifdef _WIN64
554 #define ECB_PTRSIZE 8
555 typedef uint64_t uintptr_t;
556 typedef int64_t intptr_t;
557 #else
558 #define ECB_PTRSIZE 4
559 typedef uint32_t uintptr_t;
560 typedef int32_t intptr_t;
561 #endif
526#else 562#else
527 #include <inttypes.h> 563 #include <inttypes.h>
564 #if UINTMAX_MAX > 0xffffffffU
565 #define ECB_PTRSIZE 8
566 #else
567 #define ECB_PTRSIZE 4
568 #endif
569#endif
570
571/* work around x32 idiocy by defining proper macros */
572#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
573 #if _ILP32
574 #define ECB_AMD64_X32 1
575 #else
576 #define ECB_AMD64 1
577 #endif
528#endif 578#endif
529 579
530/* many compilers define _GNUC_ to some versions but then only implement 580/* many compilers define _GNUC_ to some versions but then only implement
531 * what their idiot authors think are the "more important" extensions, 581 * what their idiot authors think are the "more important" extensions,
532 * causing enormous grief in return for some better fake benchmark numbers. 582 * causing enormous grief in return for some better fake benchmark numbers.
… …
540 #else 590 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 591 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
542 #endif 592 #endif
543#endif 593#endif
544 594
595#define ECB_CPP (__cplusplus+0)
596#define ECB_CPP11 (__cplusplus >= 201103L)
597
598#if ECB_CPP
599 #define ECB_C 0
600 #define ECB_STDC_VERSION 0
601#else
602 #define ECB_C 1
603 #define ECB_STDC_VERSION __STDC_VERSION__
604#endif
605
606#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
607#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
608
609#if ECB_CPP
610 #define ECB_EXTERN_C extern "C"
611 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
612 #define ECB_EXTERN_C_END }
613#else
614 #define ECB_EXTERN_C extern
615 #define ECB_EXTERN_C_BEG
616 #define ECB_EXTERN_C_END
617#endif
618
545/*****************************************************************************/ 619/*****************************************************************************/
546 620
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 621/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ 622/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549 623
550#if ECB_NO_THREADS 624#if ECB_NO_THREADS
551# define ECB_NO_SMP 1 625 #define ECB_NO_SMP 1
552#endif 626#endif
553 627
554#if ECB_NO_THREADS || ECB_NO_SMP 628#if ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0) 629 #define ECB_MEMORY_FENCE do { } while (0)
556#endif 630#endif
557 631
558#ifndef ECB_MEMORY_FENCE 632#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 633 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__ 634 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 635 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ 636 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ 637 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 638 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 639 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 640 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ 641 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 642 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 643 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 644 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
571 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 645 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 646 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 647 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
574 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 648 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 649 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
650 #elif __aarch64__
651 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
576 #elif __sparc || __sparc__ 652 #elif (__sparc || __sparc__) && !__sparcv8
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory") 653 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 654 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 655 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined __s390__ || defined __s390x__ 656 #elif defined __s390__ || defined __s390x__
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 657 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #elif defined __mips__ 658 #elif defined __mips__
659 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
660 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 661 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
584 #elif defined __alpha__ 662 #elif defined __alpha__
585 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") 663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
664 #elif defined __hppa__
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
666 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
667 #elif defined __ia64__
668 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
669 #elif defined __m68k__
670 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
671 #elif defined __m88k__
672 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
673 #elif defined __sh__
674 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
586 #endif 675 #endif
587 #endif 676 #endif
588#endif 677#endif
589 678
590#ifndef ECB_MEMORY_FENCE 679#ifndef ECB_MEMORY_FENCE
680 #if ECB_GCC_VERSION(4,7)
681 /* see comment below (stdatomic.h) about the C11 memory model. */
682 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
683 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
684 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
685
686 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
687 * without risking compile time errors with other compilers. We *could*
688 * define our own ecb_clang_has_feature, but I just can't be bothered to work
689 * around this shit time and again.
690 * #elif defined __clang && __has_feature (cxx_atomic)
691 * // see comment below (stdatomic.h) about the C11 memory model.
692 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
693 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
694 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
695 */
696
591 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 697 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
592 #define ECB_MEMORY_FENCE __sync_synchronize () 698 #define ECB_MEMORY_FENCE __sync_synchronize ()
593 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ 699 #elif _MSC_VER >= 1500 /* VC++ 2008 */
594 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ 700 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
701 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
702 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
703 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
704 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
595 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 705 #elif _MSC_VER >= 1400 /* VC++ 2005 */
596 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 706 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
597 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 707 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
598 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 708 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
599 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 709 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
… …
609 #define ECB_MEMORY_FENCE __sync () 719 #define ECB_MEMORY_FENCE __sync ()
610 #endif 720 #endif
611#endif 721#endif
612 722
613#ifndef ECB_MEMORY_FENCE 723#ifndef ECB_MEMORY_FENCE
724 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
725 /* we assume that these memory fences work on all variables/all memory accesses, */
726 /* not just C11 atomics and atomic accesses */
727 #include <stdatomic.h>
728 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
729 /* any fence other than seq_cst, which isn't very efficient for us. */
730 /* Why that is, we don't know - either the C11 memory model is quite useless */
731 /* for most usages, or gcc and clang have a bug */
732 /* I *currently* lean towards the latter, and inefficiently implement */
733 /* all three of ecb's fences as a seq_cst fence */
734 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
735 /* for all __atomic_thread_fence's except seq_cst */
736 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
737 #endif
738#endif
739
740#ifndef ECB_MEMORY_FENCE
614 #if !ECB_AVOID_PTHREADS 741 #if !ECB_AVOID_PTHREADS
615 /* 742 /*
616 * if you get undefined symbol references to pthread_mutex_lock, 743 * if you get undefined symbol references to pthread_mutex_lock,
617 * or failure to find pthread.h, then you should implement 744 * or failure to find pthread.h, then you should implement
618 * the ECB_MEMORY_FENCE operations for your cpu/compiler 745 * the ECB_MEMORY_FENCE operations for your cpu/compiler
… …
636 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 763 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
637#endif 764#endif
638 765
639/*****************************************************************************/ 766/*****************************************************************************/
640 767
641#define ECB_C99 (__STDC_VERSION__ >= 199901L)
642
643#if __cplusplus 768#if __cplusplus
644 #define ecb_inline static inline 769 #define ecb_inline static inline
645#elif ECB_GCC_VERSION(2,5) 770#elif ECB_GCC_VERSION(2,5)
646 #define ecb_inline static __inline__ 771 #define ecb_inline static __inline__
647#elif ECB_C99 772#elif ECB_C99
… …
672 #define ecb_is_constant(expr) __builtin_constant_p (expr) 797 #define ecb_is_constant(expr) __builtin_constant_p (expr)
673 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 798 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
674 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 799 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
675#else 800#else
676 #define ecb_attribute(attrlist) 801 #define ecb_attribute(attrlist)
802
803 /* possible C11 impl for integral types
804 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
805 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
806
677 #define ecb_is_constant(expr) 0 807 #define ecb_is_constant(expr) 0
678 #define ecb_expect(expr,value) (expr) 808 #define ecb_expect(expr,value) (expr)
679 #define ecb_prefetch(addr,rw,locality) 809 #define ecb_prefetch(addr,rw,locality)
680#endif 810#endif
681 811
… …
684 #define ecb_decltype(x) __decltype(x) 814 #define ecb_decltype(x) __decltype(x)
685#elif ECB_GCC_VERSION(3,0) 815#elif ECB_GCC_VERSION(3,0)
686 #define ecb_decltype(x) __typeof(x) 816 #define ecb_decltype(x) __typeof(x)
687#endif 817#endif
688 818
819#if _MSC_VER >= 1300
820 #define ecb_deprecated __declspec(deprecated)
821#else
822 #define ecb_deprecated ecb_attribute ((__deprecated__))
823#endif
824
689#define ecb_noinline ecb_attribute ((__noinline__)) 825#define ecb_noinline ecb_attribute ((__noinline__))
690#define ecb_noreturn ecb_attribute ((__noreturn__))
691#define ecb_unused ecb_attribute ((__unused__)) 826#define ecb_unused ecb_attribute ((__unused__))
692#define ecb_const ecb_attribute ((__const__)) 827#define ecb_const ecb_attribute ((__const__))
693#define ecb_pure ecb_attribute ((__pure__)) 828#define ecb_pure ecb_attribute ((__pure__))
829
830/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
831#if ECB_C11
832 #define ecb_noreturn _Noreturn
833#else
834 #define ecb_noreturn ecb_attribute ((__noreturn__))
835#endif
694 836
695#if ECB_GCC_VERSION(4,3) 837#if ECB_GCC_VERSION(4,3)
696 #define ecb_artificial ecb_attribute ((__artificial__)) 838 #define ecb_artificial ecb_attribute ((__artificial__))
697 #define ecb_hot ecb_attribute ((__hot__)) 839 #define ecb_hot ecb_attribute ((__hot__))
698 #define ecb_cold ecb_attribute ((__cold__)) 840 #define ecb_cold ecb_attribute ((__cold__))
… …
789 931
790 return r + ecb_ld32 (x); 932 return r + ecb_ld32 (x);
791 } 933 }
792#endif 934#endif
793 935
936ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
937ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
938ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
939ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
940
794ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 941ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 942ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
796{ 943{
797 return ( (x * 0x0802U & 0x22110U) 944 return ( (x * 0x0802U & 0x22110U)
798 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 945 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
… …
882 ecb_inline void ecb_unreachable (void) ecb_noreturn; 1029 ecb_inline void ecb_unreachable (void) ecb_noreturn;
883 ecb_inline void ecb_unreachable (void) { } 1030 ecb_inline void ecb_unreachable (void) { }
884#endif 1031#endif
885 1032
886/* try to tell the compiler that some condition is definitely true */ 1033/* try to tell the compiler that some condition is definitely true */
887#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 1034#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
888 1035
889ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 1036ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
890ecb_inline unsigned char 1037ecb_inline unsigned char
891ecb_byteorder_helper (void) 1038ecb_byteorder_helper (void)
892{ 1039{
893 const uint32_t u = 0x11223344; 1040 /* the union code still generates code under pressure in gcc, */
894 return *(unsigned char *)&u; 1041 /* but less than using pointers, and always seems to */
1042 /* successfully return a constant. */
1043 /* the reason why we have this horrible preprocessor mess */
1044 /* is to avoid it in all cases, at least on common architectures */
1045 /* or when using a recent enough gcc version (>= 4.6) */
1046#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1047 return 0x44;
1048#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1049 return 0x44;
1050#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1051 return 0x11;
1052#else
1053 union
1054 {
1055 uint32_t i;
1056 uint8_t c;
1057 } u = { 0x11223344 };
1058 return u.c;
1059#endif
895} 1060}
896 1061
897ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 1062ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
898ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 1063ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
899ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 1064ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
… …
930 } 1095 }
931#else 1096#else
932 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1097 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
933#endif 1098#endif
934 1099
1100/*******************************************************************************/
1101/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1102
1103/* basically, everything uses "ieee pure-endian" floating point numbers */
1104/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1105#if 0 \
1106 || __i386 || __i386__ \
1107 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1108 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1109 || defined __s390__ || defined __s390x__ \
1110 || defined __mips__ \
1111 || defined __alpha__ \
1112 || defined __hppa__ \
1113 || defined __ia64__ \
1114 || defined __m68k__ \
1115 || defined __m88k__ \
1116 || defined __sh__ \
1117 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1118 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1119 || defined __aarch64__
1120 #define ECB_STDFP 1
1121 #include <string.h> /* for memcpy */
1122#else
1123 #define ECB_STDFP 0
1124#endif
1125
1126#ifndef ECB_NO_LIBM
1127
1128 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1129
1130 /* only the oldest of old doesn't have this one. solaris. */
1131 #ifdef INFINITY
1132 #define ECB_INFINITY INFINITY
1133 #else
1134 #define ECB_INFINITY HUGE_VAL
1135 #endif
1136
1137 #ifdef NAN
1138 #define ECB_NAN NAN
1139 #else
1140 #define ECB_NAN ECB_INFINITY
1141 #endif
1142
1143 /* converts an ieee half/binary16 to a float */
1144 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1145 ecb_function_ float
1146 ecb_binary16_to_float (uint16_t x)
1147 {
1148 int e = (x >> 10) & 0x1f;
1149 int m = x & 0x3ff;
1150 float r;
1151
1152 if (!e ) r = ldexpf (m , -24);
1153 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1154 else if (m ) r = ECB_NAN;
1155 else r = ECB_INFINITY;
1156
1157 return x & 0x8000 ? -r : r;
1158 }
1159
1160 /* convert a float to ieee single/binary32 */
1161 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1162 ecb_function_ uint32_t
1163 ecb_float_to_binary32 (float x)
1164 {
1165 uint32_t r;
1166
1167 #if ECB_STDFP
1168 memcpy (&r, &x, 4);
1169 #else
1170 /* slow emulation, works for anything but -0 */
1171 uint32_t m;
1172 int e;
1173
1174 if (x == 0e0f ) return 0x00000000U;
1175 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1176 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1177 if (x != x ) return 0x7fbfffffU;
1178
1179 m = frexpf (x, &e) * 0x1000000U;
1180
1181 r = m & 0x80000000U;
1182
1183 if (r)
1184 m = -m;
1185
1186 if (e <= -126)
1187 {
1188 m &= 0xffffffU;
1189 m >>= (-125 - e);
1190 e = -126;
1191 }
1192
1193 r |= (e + 126) << 23;
1194 r |= m & 0x7fffffU;
1195 #endif
1196
1197 return r;
1198 }
1199
1200 /* converts an ieee single/binary32 to a float */
1201 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1202 ecb_function_ float
1203 ecb_binary32_to_float (uint32_t x)
1204 {
1205 float r;
1206
1207 #if ECB_STDFP
1208 memcpy (&r, &x, 4);
1209 #else
1210 /* emulation, only works for normals and subnormals and +0 */
1211 int neg = x >> 31;
1212 int e = (x >> 23) & 0xffU;
1213
1214 x &= 0x7fffffU;
1215
1216 if (e)
1217 x |= 0x800000U;
1218 else
1219 e = 1;
1220
1221 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1222 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1223
1224 r = neg ? -r : r;
1225 #endif
1226
1227 return r;
1228 }
1229
1230 /* convert a double to ieee double/binary64 */
1231 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1232 ecb_function_ uint64_t
1233 ecb_double_to_binary64 (double x)
1234 {
1235 uint64_t r;
1236
1237 #if ECB_STDFP
1238 memcpy (&r, &x, 8);
1239 #else
1240 /* slow emulation, works for anything but -0 */
1241 uint64_t m;
1242 int e;
1243
1244 if (x == 0e0 ) return 0x0000000000000000U;
1245 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1246 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1247 if (x != x ) return 0X7ff7ffffffffffffU;
1248
1249 m = frexp (x, &e) * 0x20000000000000U;
1250
1251 r = m & 0x8000000000000000;;
1252
1253 if (r)
1254 m = -m;
1255
1256 if (e <= -1022)
1257 {
1258 m &= 0x1fffffffffffffU;
1259 m >>= (-1021 - e);
1260 e = -1022;
1261 }
1262
1263 r |= ((uint64_t)(e + 1022)) << 52;
1264 r |= m & 0xfffffffffffffU;
1265 #endif
1266
1267 return r;
1268 }
1269
1270 /* converts an ieee double/binary64 to a double */
1271 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1272 ecb_function_ double
1273 ecb_binary64_to_double (uint64_t x)
1274 {
1275 double r;
1276
1277 #if ECB_STDFP
1278 memcpy (&r, &x, 8);
1279 #else
1280 /* emulation, only works for normals and subnormals and +0 */
1281 int neg = x >> 63;
1282 int e = (x >> 52) & 0x7ffU;
1283
1284 x &= 0xfffffffffffffU;
1285
1286 if (e)
1287 x |= 0x10000000000000U;
1288 else
1289 e = 1;
1290
1291 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1292 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1293
1294 r = neg ? -r : r;
1295 #endif
1296
1297 return r;
1298 }
1299
1300#endif
1301
935#endif 1302#endif
936 1303
937/* ECB.H END */ 1304/* ECB.H END */
938 1305
939#if ECB_MEMORY_FENCE_NEEDS_PTHREADS 1306#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
… …
1108#endif 1475#endif
1109 1476
1110static void (*syserr_cb)(const char *msg) EV_THROW; 1477static void (*syserr_cb)(const char *msg) EV_THROW;
1111 1478
1112void ecb_cold 1479void ecb_cold
1113ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW 1480ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1114{ 1481{
1115 syserr_cb = cb; 1482 syserr_cb = cb;
1116} 1483}
1117 1484
1118static void noinline ecb_cold 1485static void noinline ecb_cold
… …
1136 abort (); 1503 abort ();
1137 } 1504 }
1138} 1505}
1139 1506
1140static void * 1507static void *
1141ev_realloc_emul (void *ptr, long size) 1508ev_realloc_emul (void *ptr, long size) EV_THROW
1142{ 1509{
1143#if __GLIBC__
1144 return realloc (ptr, size);
1145#else
1146 /* some systems, notably openbsd and darwin, fail to properly 1510 /* some systems, notably openbsd and darwin, fail to properly
1147 * implement realloc (x, 0) (as required by both ansi c-89 and 1511 * implement realloc (x, 0) (as required by both ansi c-89 and
1148 * the single unix specification, so work around them here. 1512 * the single unix specification, so work around them here.
1513 * recently, also (at least) fedora and debian started breaking it,
1514 * despite documenting it otherwise.
1149 */ 1515 */
1150 1516
1151 if (size) 1517 if (size)
1152 return realloc (ptr, size); 1518 return realloc (ptr, size);
1153 1519
1154 free (ptr); 1520 free (ptr);
1155 return 0; 1521 return 0;
1156#endif
1157} 1522}
1158 1523
1159static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul; 1524static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1160 1525
1161void ecb_cold 1526void ecb_cold
1162ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW 1527ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1163{ 1528{
1164 alloc = cb; 1529 alloc = cb;
1165} 1530}
1166 1531
1167inline_speed void * 1532inline_speed void *
… …
1430 w_->pending = ++pendingcnt [pri]; 1795 w_->pending = ++pendingcnt [pri];
1431 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1796 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1432 pendings [pri][w_->pending - 1].w = w_; 1797 pendings [pri][w_->pending - 1].w = w_;
1433 pendings [pri][w_->pending - 1].events = revents; 1798 pendings [pri][w_->pending - 1].events = revents;
1434 } 1799 }
1800
1801 pendingpri = NUMPRI - 1;
1435} 1802}
1436 1803
1437inline_speed void 1804inline_speed void
1438feed_reverse (EV_P_ W w) 1805feed_reverse (EV_P_ W w)
1439{ 1806{
… …
1814static void noinline ecb_cold 2181static void noinline ecb_cold
1815evpipe_init (EV_P) 2182evpipe_init (EV_P)
1816{ 2183{
1817 if (!ev_is_active (&pipe_w)) 2184 if (!ev_is_active (&pipe_w))
1818 { 2185 {
2186 int fds [2];
2187
1819# if EV_USE_EVENTFD 2188# if EV_USE_EVENTFD
2189 fds [0] = -1;
1820 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2190 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1821 if (evfd < 0 && errno == EINVAL) 2191 if (fds [1] < 0 && errno == EINVAL)
1822 evfd = eventfd (0, 0); 2192 fds [1] = eventfd (0, 0);
1823 2193
1824 if (evfd >= 0) 2194 if (fds [1] < 0)
2195# endif
1825 { 2196 {
2197 while (pipe (fds))
2198 ev_syserr ("(libev) error creating signal/async pipe");
2199
2200 fd_intern (fds [0]);
2201 }
2202
1826 evpipe [0] = -1; 2203 evpipe [0] = fds [0];
1827 fd_intern (evfd); /* doing it twice doesn't hurt */ 2204
1828 ev_io_set (&pipe_w, evfd, EV_READ); 2205 if (evpipe [1] < 0)
2206 evpipe [1] = fds [1]; /* first call, set write fd */
2207 else
2208 {
2209 /* on subsequent calls, do not change evpipe [1] */
2210 /* so that evpipe_write can always rely on its value. */
2211 /* this branch does not do anything sensible on windows, */
2212 /* so must not be executed on windows */
2213
2214 dup2 (fds [1], evpipe [1]);
2215 close (fds [1]);
2216 }
2217
2218 fd_intern (evpipe [1]);
2219
2220 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2221 ev_io_start (EV_A_ &pipe_w);
2222 ev_unref (EV_A); /* watcher should not keep loop alive */
2223 }
2224}
2225
2226inline_speed void
2227evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2228{
2229 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2230
2231 if (expect_true (*flag))
2232 return;
2233
2234 *flag = 1;
2235 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2236
2237 pipe_write_skipped = 1;
2238
2239 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2240
2241 if (pipe_write_wanted)
2242 {
2243 int old_errno;
2244
2245 pipe_write_skipped = 0;
2246 ECB_MEMORY_FENCE_RELEASE;
2247
2248 old_errno = errno; /* save errno because write will clobber it */
2249
2250#if EV_USE_EVENTFD
2251 if (evpipe [0] < 0)
2252 {
2253 uint64_t counter = 1;
2254 write (evpipe [1], &counter, sizeof (uint64_t));
1829 } 2255 }
1830 else 2256 else
1831# endif 2257#endif
1832 { 2258 {
1833 while (pipe (evpipe)) 2259#ifdef _WIN32
1834 ev_syserr ("(libev) error creating signal/async pipe"); 2260 WSABUF buf;
1835 2261 DWORD sent;
1836 fd_intern (evpipe [0]); 2262 buf.buf = &buf;
1837 fd_intern (evpipe [1]); 2263 buf.len = 1;
1838 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2264 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1839 } 2265#else
1840
1841 ev_io_start (EV_A_ &pipe_w);
1842 ev_unref (EV_A); /* watcher should not keep loop alive */
1843 }
1844}
1845
1846inline_speed void
1847evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1848{
1849 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1850
1851 if (expect_true (*flag))
1852 return;
1853
1854 *flag = 1;
1855
1856 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1857
1858 pipe_write_skipped = 1;
1859
1860 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1861
1862 if (pipe_write_wanted)
1863 {
1864 int old_errno;
1865
1866 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1867
1868 old_errno = errno; /* save errno because write will clobber it */
1869
1870#if EV_USE_EVENTFD
1871 if (evfd >= 0)
1872 {
1873 uint64_t counter = 1;
1874 write (evfd, &counter, sizeof (uint64_t));
1875 }
1876 else
1877#endif
1878 {
1879 /* win32 people keep sending patches that change this write() to send() */
1880 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1881 /* so when you think this write should be a send instead, please find out */
1882 /* where your send() is from - it's definitely not the microsoft send, and */
1883 /* tell me. thank you. */
1884 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1885 /* check the ev documentation on how to use this flag */
1886 write (evpipe [1], &(evpipe [1]), 1); 2266 write (evpipe [1], &(evpipe [1]), 1);
2267#endif
1887 } 2268 }
1888 2269
1889 errno = old_errno; 2270 errno = old_errno;
1890 } 2271 }
1891} 2272}
… …
1898 int i; 2279 int i;
1899 2280
1900 if (revents & EV_READ) 2281 if (revents & EV_READ)
1901 { 2282 {
1902#if EV_USE_EVENTFD 2283#if EV_USE_EVENTFD
1903 if (evfd >= 0) 2284 if (evpipe [0] < 0)
1904 { 2285 {
1905 uint64_t counter; 2286 uint64_t counter;
1906 read (evfd, &counter, sizeof (uint64_t)); 2287 read (evpipe [1], &counter, sizeof (uint64_t));
1907 } 2288 }
1908 else 2289 else
1909#endif 2290#endif
1910 { 2291 {
1911 char dummy; 2292 char dummy[4];
1912 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2293#ifdef _WIN32
2294 WSABUF buf;
2295 DWORD recvd;
2296 DWORD flags = 0;
2297 buf.buf = dummy;
2298 buf.len = sizeof (dummy);
2299 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2300#else
1913 read (evpipe [0], &dummy, 1); 2301 read (evpipe [0], &dummy, sizeof (dummy));
2302#endif
1914 } 2303 }
1915 } 2304 }
1916 2305
1917 pipe_write_skipped = 0; 2306 pipe_write_skipped = 0;
1918 2307
… …
1921#if EV_SIGNAL_ENABLE 2310#if EV_SIGNAL_ENABLE
1922 if (sig_pending) 2311 if (sig_pending)
1923 { 2312 {
1924 sig_pending = 0; 2313 sig_pending = 0;
1925 2314
1926 ECB_MEMORY_FENCE_RELEASE; 2315 ECB_MEMORY_FENCE;
1927 2316
1928 for (i = EV_NSIG - 1; i--; ) 2317 for (i = EV_NSIG - 1; i--; )
1929 if (expect_false (signals [i].pending)) 2318 if (expect_false (signals [i].pending))
1930 ev_feed_signal_event (EV_A_ i + 1); 2319 ev_feed_signal_event (EV_A_ i + 1);
1931 } 2320 }
… …
1934#if EV_ASYNC_ENABLE 2323#if EV_ASYNC_ENABLE
1935 if (async_pending) 2324 if (async_pending)
1936 { 2325 {
1937 async_pending = 0; 2326 async_pending = 0;
1938 2327
1939 ECB_MEMORY_FENCE_RELEASE; 2328 ECB_MEMORY_FENCE;
1940 2329
1941 for (i = asynccnt; i--; ) 2330 for (i = asynccnt; i--; )
1942 if (asyncs [i]->sent) 2331 if (asyncs [i]->sent)
1943 { 2332 {
1944 asyncs [i]->sent = 0; 2333 asyncs [i]->sent = 0;
2334 ECB_MEMORY_FENCE_RELEASE;
1945 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2335 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1946 } 2336 }
1947 } 2337 }
1948#endif 2338#endif
1949} 2339}
… …
1952 2342
1953void 2343void
1954ev_feed_signal (int signum) EV_THROW 2344ev_feed_signal (int signum) EV_THROW
1955{ 2345{
1956#if EV_MULTIPLICITY 2346#if EV_MULTIPLICITY
2347 EV_P;
2348 ECB_MEMORY_FENCE_ACQUIRE;
1957 EV_P = signals [signum - 1].loop; 2349 EV_A = signals [signum - 1].loop;
1958 2350
1959 if (!EV_A) 2351 if (!EV_A)
1960 return; 2352 return;
1961#endif 2353#endif
1962 2354
1963 if (!ev_active (&pipe_w))
1964 return;
1965
1966 signals [signum - 1].pending = 1; 2355 signals [signum - 1].pending = 1;
1967 evpipe_write (EV_A_ &sig_pending); 2356 evpipe_write (EV_A_ &sig_pending);
1968} 2357}
1969 2358
1970static void 2359static void
… …
1980void noinline 2369void noinline
1981ev_feed_signal_event (EV_P_ int signum) EV_THROW 2370ev_feed_signal_event (EV_P_ int signum) EV_THROW
1982{ 2371{
1983 WL w; 2372 WL w;
1984 2373
1985 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2374 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1986 return; 2375 return;
1987 2376
1988 --signum; 2377 --signum;
1989 2378
1990#if EV_MULTIPLICITY 2379#if EV_MULTIPLICITY
… …
1994 if (expect_false (signals [signum].loop != EV_A)) 2383 if (expect_false (signals [signum].loop != EV_A))
1995 return; 2384 return;
1996#endif 2385#endif
1997 2386
1998 signals [signum].pending = 0; 2387 signals [signum].pending = 0;
2388 ECB_MEMORY_FENCE_RELEASE;
1999 2389
2000 for (w = signals [signum].head; w; w = w->next) 2390 for (w = signals [signum].head; w; w = w->next)
2001 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2391 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2002} 2392}
2003 2393
… …
2217{ 2607{
2218 return userdata; 2608 return userdata;
2219} 2609}
2220 2610
2221void 2611void
2222ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW 2612ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2223{ 2613{
2224 invoke_cb = invoke_pending_cb; 2614 invoke_cb = invoke_pending_cb;
2225} 2615}
2226 2616
2227void 2617void
… …
2287#if EV_ASYNC_ENABLE 2677#if EV_ASYNC_ENABLE
2288 async_pending = 0; 2678 async_pending = 0;
2289#endif 2679#endif
2290 pipe_write_skipped = 0; 2680 pipe_write_skipped = 0;
2291 pipe_write_wanted = 0; 2681 pipe_write_wanted = 0;
2682 evpipe [0] = -1;
2683 evpipe [1] = -1;
2292#if EV_USE_INOTIFY 2684#if EV_USE_INOTIFY
2293 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2685 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2294#endif 2686#endif
2295#if EV_USE_SIGNALFD 2687#if EV_USE_SIGNALFD
2296 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2688 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
… …
2347 EV_INVOKE_PENDING; 2739 EV_INVOKE_PENDING;
2348 } 2740 }
2349#endif 2741#endif
2350 2742
2351#if EV_CHILD_ENABLE 2743#if EV_CHILD_ENABLE
2352 if (ev_is_active (&childev)) 2744 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2353 { 2745 {
2354 ev_ref (EV_A); /* child watcher */ 2746 ev_ref (EV_A); /* child watcher */
2355 ev_signal_stop (EV_A_ &childev); 2747 ev_signal_stop (EV_A_ &childev);
2356 } 2748 }
2357#endif 2749#endif
… …
2359 if (ev_is_active (&pipe_w)) 2751 if (ev_is_active (&pipe_w))
2360 { 2752 {
2361 /*ev_ref (EV_A);*/ 2753 /*ev_ref (EV_A);*/
2362 /*ev_io_stop (EV_A_ &pipe_w);*/ 2754 /*ev_io_stop (EV_A_ &pipe_w);*/
2363 2755
2364#if EV_USE_EVENTFD
2365 if (evfd >= 0)
2366 close (evfd);
2367#endif
2368
2369 if (evpipe [0] >= 0)
2370 {
2371 EV_WIN32_CLOSE_FD (evpipe [0]); 2756 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2372 EV_WIN32_CLOSE_FD (evpipe [1]); 2757 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2373 }
2374 } 2758 }
2375 2759
2376#if EV_USE_SIGNALFD 2760#if EV_USE_SIGNALFD
2377 if (ev_is_active (&sigfd_w)) 2761 if (ev_is_active (&sigfd_w))
2378 close (sigfd); 2762 close (sigfd);
… …
2464#endif 2848#endif
2465#if EV_USE_INOTIFY 2849#if EV_USE_INOTIFY
2466 infy_fork (EV_A); 2850 infy_fork (EV_A);
2467#endif 2851#endif
2468 2852
2853#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2469 if (ev_is_active (&pipe_w)) 2854 if (ev_is_active (&pipe_w))
2470 { 2855 {
2471 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 2856 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2472 2857
2473 ev_ref (EV_A); 2858 ev_ref (EV_A);
2474 ev_io_stop (EV_A_ &pipe_w); 2859 ev_io_stop (EV_A_ &pipe_w);
2475 2860
2476#if EV_USE_EVENTFD
2477 if (evfd >= 0)
2478 close (evfd);
2479#endif
2480
2481 if (evpipe [0] >= 0) 2861 if (evpipe [0] >= 0)
2482 {
2483 EV_WIN32_CLOSE_FD (evpipe [0]); 2862 EV_WIN32_CLOSE_FD (evpipe [0]);
2484 EV_WIN32_CLOSE_FD (evpipe [1]);
2485 }
2486 2863
2487#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2488 evpipe_init (EV_A); 2864 evpipe_init (EV_A);
2489 /* now iterate over everything, in case we missed something */ 2865 /* iterate over everything, in case we missed something before */
2490 pipecb (EV_A_ &pipe_w, EV_READ); 2866 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2491#endif
2492 } 2867 }
2868#endif
2493 2869
2494 postfork = 0; 2870 postfork = 0;
2495} 2871}
2496 2872
2497#if EV_MULTIPLICITY 2873#if EV_MULTIPLICITY
… …
2553void ecb_cold 2929void ecb_cold
2554ev_verify (EV_P) EV_THROW 2930ev_verify (EV_P) EV_THROW
2555{ 2931{
2556#if EV_VERIFY 2932#if EV_VERIFY
2557 int i; 2933 int i;
2558 WL w; 2934 WL w, w2;
2559 2935
2560 assert (activecnt >= -1); 2936 assert (activecnt >= -1);
2561 2937
2562 assert (fdchangemax >= fdchangecnt); 2938 assert (fdchangemax >= fdchangecnt);
2563 for (i = 0; i < fdchangecnt; ++i) 2939 for (i = 0; i < fdchangecnt; ++i)
2564 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2940 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2565 2941
2566 assert (anfdmax >= 0); 2942 assert (anfdmax >= 0);
2567 for (i = 0; i < anfdmax; ++i) 2943 for (i = 0; i < anfdmax; ++i)
2944 {
2945 int j = 0;
2946
2568 for (w = anfds [i].head; w; w = w->next) 2947 for (w = w2 = anfds [i].head; w; w = w->next)
2569 { 2948 {
2570 verify_watcher (EV_A_ (W)w); 2949 verify_watcher (EV_A_ (W)w);
2950
2951 if (j++ & 1)
2952 {
2953 assert (("libev: io watcher list contains a loop", w != w2));
2954 w2 = w2->next;
2955 }
2956
2571 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2957 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2572 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2958 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2573 } 2959 }
2960 }
2574 2961
2575 assert (timermax >= timercnt); 2962 assert (timermax >= timercnt);
2576 verify_heap (EV_A_ timers, timercnt); 2963 verify_heap (EV_A_ timers, timercnt);
2577 2964
2578#if EV_PERIODIC_ENABLE 2965#if EV_PERIODIC_ENABLE
… …
2659} 3046}
2660 3047
2661void 3048void
2662ev_loop_fork (EV_P) EV_THROW 3049ev_loop_fork (EV_P) EV_THROW
2663{ 3050{
2664 postfork = 1; /* must be in line with ev_default_fork */ 3051 postfork = 1;
2665} 3052}
2666 3053
2667/*****************************************************************************/ 3054/*****************************************************************************/
2668 3055
2669void 3056void
… …
2685} 3072}
2686 3073
2687void noinline 3074void noinline
2688ev_invoke_pending (EV_P) 3075ev_invoke_pending (EV_P)
2689{ 3076{
2690 int pri; 3077 pendingpri = NUMPRI;
2691 3078
2692 for (pri = NUMPRI; pri--; ) 3079 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3080 {
3081 --pendingpri;
3082
2693 while (pendingcnt [pri]) 3083 while (pendingcnt [pendingpri])
2694 { 3084 {
2695 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3085 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2696 3086
2697 p->w->pending = 0; 3087 p->w->pending = 0;
2698 EV_CB_INVOKE (p->w, p->events); 3088 EV_CB_INVOKE (p->w, p->events);
2699 EV_FREQUENT_CHECK; 3089 EV_FREQUENT_CHECK;
2700 } 3090 }
3091 }
2701} 3092}
2702 3093
2703#if EV_IDLE_ENABLE 3094#if EV_IDLE_ENABLE
2704/* make idle watchers pending. this handles the "call-idle */ 3095/* make idle watchers pending. this handles the "call-idle */
2705/* only when higher priorities are idle" logic */ 3096/* only when higher priorities are idle" logic */
… …
2795{ 3186{
2796 EV_FREQUENT_CHECK; 3187 EV_FREQUENT_CHECK;
2797 3188
2798 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3189 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2799 { 3190 {
2800 int feed_count = 0;
2801
2802 do 3191 do
2803 { 3192 {
2804 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3193 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2805 3194
2806 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3195 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
3065 backend_poll (EV_A_ waittime); 3454 backend_poll (EV_A_ waittime);
3066 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3455 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3067 3456
3068 pipe_write_wanted = 0; /* just an optimisation, no fence needed */ 3457 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3069 3458
3459 ECB_MEMORY_FENCE_ACQUIRE;
3070 if (pipe_write_skipped) 3460 if (pipe_write_skipped)
3071 { 3461 {
3072 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); 3462 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3073 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3463 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3074 } 3464 }
… …
3249 EV_FREQUENT_CHECK; 3639 EV_FREQUENT_CHECK;
3250 3640
3251 ev_start (EV_A_ (W)w, 1); 3641 ev_start (EV_A_ (W)w, 1);
3252 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3642 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3253 wlist_add (&anfds[fd].head, (WL)w); 3643 wlist_add (&anfds[fd].head, (WL)w);
3644
3645 /* common bug, apparently */
3646 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3254 3647
3255 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3648 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3256 w->events &= ~EV__IOFDSET; 3649 w->events &= ~EV__IOFDSET;
3257 3650
3258 EV_FREQUENT_CHECK; 3651 EV_FREQUENT_CHECK;
… …
3449#if EV_MULTIPLICITY 3842#if EV_MULTIPLICITY
3450 assert (("libev: a signal must not be attached to two different loops", 3843 assert (("libev: a signal must not be attached to two different loops",
3451 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3844 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3452 3845
3453 signals [w->signum - 1].loop = EV_A; 3846 signals [w->signum - 1].loop = EV_A;
3847 ECB_MEMORY_FENCE_RELEASE;
3454#endif 3848#endif
3455 3849
3456 EV_FREQUENT_CHECK; 3850 EV_FREQUENT_CHECK;
3457 3851
3458#if EV_USE_SIGNALFD 3852#if EV_USE_SIGNALFD
… …
3613# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4007# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3614 4008
3615static void noinline 4009static void noinline
3616infy_add (EV_P_ ev_stat *w) 4010infy_add (EV_P_ ev_stat *w)
3617{ 4011{
3618 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); 4012 w->wd = inotify_add_watch (fs_fd, w->path,
4013 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4014 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4015 | IN_DONT_FOLLOW | IN_MASK_ADD);
3619 4016
3620 if (w->wd >= 0) 4017 if (w->wd >= 0)
3621 { 4018 {
3622 struct statfs sfs; 4019 struct statfs sfs;
3623 4020
… …
3627 4024
3628 if (!fs_2625) 4025 if (!fs_2625)
3629 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4026 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3630 else if (!statfs (w->path, &sfs) 4027 else if (!statfs (w->path, &sfs)
3631 && (sfs.f_type == 0x1373 /* devfs */ 4028 && (sfs.f_type == 0x1373 /* devfs */
4029 || sfs.f_type == 0x4006 /* fat */
4030 || sfs.f_type == 0x4d44 /* msdos */
3632 || sfs.f_type == 0xEF53 /* ext2/3 */ 4031 || sfs.f_type == 0xEF53 /* ext2/3 */
4032 || sfs.f_type == 0x72b6 /* jffs2 */
4033 || sfs.f_type == 0x858458f6 /* ramfs */
4034 || sfs.f_type == 0x5346544e /* ntfs */
3633 || sfs.f_type == 0x3153464a /* jfs */ 4035 || sfs.f_type == 0x3153464a /* jfs */
4036 || sfs.f_type == 0x9123683e /* btrfs */
3634 || sfs.f_type == 0x52654973 /* reiser3 */ 4037 || sfs.f_type == 0x52654973 /* reiser3 */
3635 || sfs.f_type == 0x01021994 /* tempfs */ 4038 || sfs.f_type == 0x01021994 /* tmpfs */
3636 || sfs.f_type == 0x58465342 /* xfs */)) 4039 || sfs.f_type == 0x58465342 /* xfs */))
3637 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4040 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3638 else 4041 else
3639 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4042 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3640 } 4043 }

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