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Comparing libev/ev.c (file contents):
Revision 1.422 by root, Wed Apr 18 06:09:29 2012 UTC vs.
Revision 1.467 by root, Fri May 16 15:15:39 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 *
… …
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
260# endif 258# endif
261#endif 259#endif
… …
356 354
357#ifndef EV_HEAP_CACHE_AT 355#ifndef EV_HEAP_CACHE_AT
358# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 356# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
359#endif 357#endif
360 358
359#ifdef ANDROID
360/* supposedly, android doesn't typedef fd_mask */
361# undef EV_USE_SELECT
362# define EV_USE_SELECT 0
363/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
364# undef EV_USE_CLOCK_SYSCALL
365# define EV_USE_CLOCK_SYSCALL 0
366#endif
367
368/* aix's poll.h seems to cause lots of trouble */
369#ifdef _AIX
370/* AIX has a completely broken poll.h header */
371# undef EV_USE_POLL
372# define EV_USE_POLL 0
373#endif
374
361/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 375/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
362/* which makes programs even slower. might work on other unices, too. */ 376/* which makes programs even slower. might work on other unices, too. */
363#if EV_USE_CLOCK_SYSCALL 377#if EV_USE_CLOCK_SYSCALL
364# include <syscall.h> 378# include <sys/syscall.h>
365# ifdef SYS_clock_gettime 379# ifdef SYS_clock_gettime
366# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 380# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
367# undef EV_USE_MONOTONIC 381# undef EV_USE_MONOTONIC
368# define EV_USE_MONOTONIC 1 382# define EV_USE_MONOTONIC 1
369# else 383# else
… …
372# endif 386# endif
373#endif 387#endif
374 388
375/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 389/* this block fixes any misconfiguration where we know we run into trouble otherwise */
376 390
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 391#ifndef CLOCK_MONOTONIC
384# undef EV_USE_MONOTONIC 392# undef EV_USE_MONOTONIC
385# define EV_USE_MONOTONIC 0 393# define EV_USE_MONOTONIC 0
386#endif 394#endif
387 395
… …
408/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 416/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
409# ifndef IN_DONT_FOLLOW 417# ifndef IN_DONT_FOLLOW
410# undef EV_USE_INOTIFY 418# undef EV_USE_INOTIFY
411# define EV_USE_INOTIFY 0 419# define EV_USE_INOTIFY 0
412# endif 420# endif
413#endif
414
415#if EV_SELECT_IS_WINSOCKET
416# include <winsock.h>
417#endif 421#endif
418 422
419#if EV_USE_EVENTFD 423#if EV_USE_EVENTFD
420/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 424/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
421# include <stdint.h> 425# include <stdint.h>
… …
478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ 482/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
479/* ECB.H BEGIN */ 483/* ECB.H BEGIN */
480/* 484/*
481 * libecb - http://software.schmorp.de/pkg/libecb 485 * libecb - http://software.schmorp.de/pkg/libecb
482 * 486 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> 487 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta 488 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved. 489 * All rights reserved.
486 * 490 *
487 * Redistribution and use in source and binary forms, with or without modifica- 491 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met: 492 * tion, are permitted provided that the following conditions are met:
… …
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 506 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 507 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- 508 * 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 509 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE. 510 * OF THE POSSIBILITY OF SUCH DAMAGE.
511 *
512 * Alternatively, the contents of this file may be used under the terms of
513 * the GNU General Public License ("GPL") version 2 or any later version,
514 * in which case the provisions of the GPL are applicable instead of
515 * the above. If you wish to allow the use of your version of this file
516 * only under the terms of the GPL and not to allow others to use your
517 * version of this file under the BSD license, indicate your decision
518 * by deleting the provisions above and replace them with the notice
519 * and other provisions required by the GPL. If you do not delete the
520 * provisions above, a recipient may use your version of this file under
521 * either the BSD or the GPL.
507 */ 522 */
508 523
509#ifndef ECB_H 524#ifndef ECB_H
510#define ECB_H 525#define ECB_H
526
527/* 16 bits major, 16 bits minor */
528#define ECB_VERSION 0x00010003
511 529
512#ifdef _WIN32 530#ifdef _WIN32
513 typedef signed char int8_t; 531 typedef signed char int8_t;
514 typedef unsigned char uint8_t; 532 typedef unsigned char uint8_t;
515 typedef signed short int16_t; 533 typedef signed short int16_t;
… …
521 typedef unsigned long long uint64_t; 539 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */ 540 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t; 541 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t; 542 typedef unsigned __int64 uint64_t;
525 #endif 543 #endif
544 #ifdef _WIN64
545 #define ECB_PTRSIZE 8
546 typedef uint64_t uintptr_t;
547 typedef int64_t intptr_t;
548 #else
549 #define ECB_PTRSIZE 4
550 typedef uint32_t uintptr_t;
551 typedef int32_t intptr_t;
552 #endif
526#else 553#else
527 #include <inttypes.h> 554 #include <inttypes.h>
555 #if UINTMAX_MAX > 0xffffffffU
556 #define ECB_PTRSIZE 8
557 #else
558 #define ECB_PTRSIZE 4
559 #endif
560#endif
561
562/* work around x32 idiocy by defining proper macros */
563#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
564 #if _ILP32
565 #define ECB_AMD64_X32 1
566 #else
567 #define ECB_AMD64 1
568 #endif
528#endif 569#endif
529 570
530/* many compilers define _GNUC_ to some versions but then only implement 571/* many compilers define _GNUC_ to some versions but then only implement
531 * what their idiot authors think are the "more important" extensions, 572 * what their idiot authors think are the "more important" extensions,
532 * causing enormous grief in return for some better fake benchmark numbers. 573 * causing enormous grief in return for some better fake benchmark numbers.
… …
540 #else 581 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 582 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
542 #endif 583 #endif
543#endif 584#endif
544 585
586#define ECB_CPP (__cplusplus+0)
587#define ECB_CPP11 (__cplusplus >= 201103L)
588
589#if ECB_CPP
590 #define ECB_C 0
591 #define ECB_STDC_VERSION 0
592#else
593 #define ECB_C 1
594 #define ECB_STDC_VERSION __STDC_VERSION__
595#endif
596
597#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
598#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
599
600#if ECB_CPP
601 #define ECB_EXTERN_C extern "C"
602 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
603 #define ECB_EXTERN_C_END }
604#else
605 #define ECB_EXTERN_C extern
606 #define ECB_EXTERN_C_BEG
607 #define ECB_EXTERN_C_END
608#endif
609
545/*****************************************************************************/ 610/*****************************************************************************/
546 611
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 612/* 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 */ 613/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549 614
550#if ECB_NO_THREADS 615#if ECB_NO_THREADS
551# define ECB_NO_SMP 1 616 #define ECB_NO_SMP 1
552#endif 617#endif
553 618
554#if ECB_NO_THREADS || ECB_NO_SMP 619#if ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0) 620 #define ECB_MEMORY_FENCE do { } while (0)
556#endif 621#endif
557 622
558#ifndef ECB_MEMORY_FENCE 623#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 624 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__ 625 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 626 #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 */ 627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ 628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 629 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 631 #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 */ 632 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 633 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 635 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
571 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 636 || 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") 637 #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__ \ 638 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
574 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 639 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
641 #elif __aarch64__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
576 #elif __sparc || __sparc__ 643 #elif (__sparc || __sparc__) && !__sparcv8
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory") 644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 645 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined __s390__ || defined __s390x__ 647 #elif defined __s390__ || defined __s390x__
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #elif defined __mips__ 649 #elif defined __mips__
650 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
651 /* 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") 652 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
584 #elif defined __alpha__ 653 #elif defined __alpha__
585 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") 654 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
655 #elif defined __hppa__
656 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif defined __ia64__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
660 #elif defined __m68k__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
662 #elif defined __m88k__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
664 #elif defined __sh__
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
586 #endif 666 #endif
587 #endif 667 #endif
588#endif 668#endif
589 669
590#ifndef ECB_MEMORY_FENCE 670#ifndef ECB_MEMORY_FENCE
671 #if ECB_GCC_VERSION(4,7)
672 /* see comment below (stdatomic.h) about the C11 memory model. */
673 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
674 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
675 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
676
677 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
678 * without risking compile time errors with other compilers. We *could*
679 * define our own ecb_clang_has_feature, but I just can't be bothered to work
680 * around this shit time and again.
681 * #elif defined __clang && __has_feature (cxx_atomic)
682 * // see comment below (stdatomic.h) about the C11 memory model.
683 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
684 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
685 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
686 */
687
591 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 688 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
592 #define ECB_MEMORY_FENCE __sync_synchronize () 689 #define ECB_MEMORY_FENCE __sync_synchronize ()
593 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ 690 #elif _MSC_VER >= 1500 /* VC++ 2008 */
594 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ 691 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
692 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
693 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
694 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
695 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
595 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 696 #elif _MSC_VER >= 1400 /* VC++ 2005 */
596 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 697 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
597 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 698 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
598 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 699 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
599 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 700 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
… …
609 #define ECB_MEMORY_FENCE __sync () 710 #define ECB_MEMORY_FENCE __sync ()
610 #endif 711 #endif
611#endif 712#endif
612 713
613#ifndef ECB_MEMORY_FENCE 714#ifndef ECB_MEMORY_FENCE
715 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
716 /* we assume that these memory fences work on all variables/all memory accesses, */
717 /* not just C11 atomics and atomic accesses */
718 #include <stdatomic.h>
719 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
720 /* any fence other than seq_cst, which isn't very efficient for us. */
721 /* Why that is, we don't know - either the C11 memory model is quite useless */
722 /* for most usages, or gcc and clang have a bug */
723 /* I *currently* lean towards the latter, and inefficiently implement */
724 /* all three of ecb's fences as a seq_cst fence */
725 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
726 /* for all __atomic_thread_fence's except seq_cst */
727 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
728 #endif
729#endif
730
731#ifndef ECB_MEMORY_FENCE
614 #if !ECB_AVOID_PTHREADS 732 #if !ECB_AVOID_PTHREADS
615 /* 733 /*
616 * if you get undefined symbol references to pthread_mutex_lock, 734 * if you get undefined symbol references to pthread_mutex_lock,
617 * or failure to find pthread.h, then you should implement 735 * or failure to find pthread.h, then you should implement
618 * the ECB_MEMORY_FENCE operations for your cpu/compiler 736 * the ECB_MEMORY_FENCE operations for your cpu/compiler
… …
636 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 754 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
637#endif 755#endif
638 756
639/*****************************************************************************/ 757/*****************************************************************************/
640 758
641#define ECB_C99 (__STDC_VERSION__ >= 199901L)
642
643#if __cplusplus 759#if __cplusplus
644 #define ecb_inline static inline 760 #define ecb_inline static inline
645#elif ECB_GCC_VERSION(2,5) 761#elif ECB_GCC_VERSION(2,5)
646 #define ecb_inline static __inline__ 762 #define ecb_inline static __inline__
647#elif ECB_C99 763#elif ECB_C99
… …
672 #define ecb_is_constant(expr) __builtin_constant_p (expr) 788 #define ecb_is_constant(expr) __builtin_constant_p (expr)
673 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 789 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
674 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 790 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
675#else 791#else
676 #define ecb_attribute(attrlist) 792 #define ecb_attribute(attrlist)
793
794 /* possible C11 impl for integral types
795 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
796 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
797
677 #define ecb_is_constant(expr) 0 798 #define ecb_is_constant(expr) 0
678 #define ecb_expect(expr,value) (expr) 799 #define ecb_expect(expr,value) (expr)
679 #define ecb_prefetch(addr,rw,locality) 800 #define ecb_prefetch(addr,rw,locality)
680#endif 801#endif
681 802
… …
685#elif ECB_GCC_VERSION(3,0) 806#elif ECB_GCC_VERSION(3,0)
686 #define ecb_decltype(x) __typeof(x) 807 #define ecb_decltype(x) __typeof(x)
687#endif 808#endif
688 809
689#define ecb_noinline ecb_attribute ((__noinline__)) 810#define ecb_noinline ecb_attribute ((__noinline__))
690#define ecb_noreturn ecb_attribute ((__noreturn__))
691#define ecb_unused ecb_attribute ((__unused__)) 811#define ecb_unused ecb_attribute ((__unused__))
692#define ecb_const ecb_attribute ((__const__)) 812#define ecb_const ecb_attribute ((__const__))
693#define ecb_pure ecb_attribute ((__pure__)) 813#define ecb_pure ecb_attribute ((__pure__))
814
815#if ECB_C11
816 #define ecb_noreturn _Noreturn
817#else
818 #define ecb_noreturn ecb_attribute ((__noreturn__))
819#endif
694 820
695#if ECB_GCC_VERSION(4,3) 821#if ECB_GCC_VERSION(4,3)
696 #define ecb_artificial ecb_attribute ((__artificial__)) 822 #define ecb_artificial ecb_attribute ((__artificial__))
697 #define ecb_hot ecb_attribute ((__hot__)) 823 #define ecb_hot ecb_attribute ((__hot__))
698 #define ecb_cold ecb_attribute ((__cold__)) 824 #define ecb_cold ecb_attribute ((__cold__))
… …
789 915
790 return r + ecb_ld32 (x); 916 return r + ecb_ld32 (x);
791 } 917 }
792#endif 918#endif
793 919
920ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
921ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
922ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
923ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
924
794ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 925ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 926ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
796{ 927{
797 return ( (x * 0x0802U & 0x22110U) 928 return ( (x * 0x0802U & 0x22110U)
798 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 929 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
… …
882 ecb_inline void ecb_unreachable (void) ecb_noreturn; 1013 ecb_inline void ecb_unreachable (void) ecb_noreturn;
883 ecb_inline void ecb_unreachable (void) { } 1014 ecb_inline void ecb_unreachable (void) { }
884#endif 1015#endif
885 1016
886/* try to tell the compiler that some condition is definitely true */ 1017/* try to tell the compiler that some condition is definitely true */
887#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 1018#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
888 1019
889ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 1020ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
890ecb_inline unsigned char 1021ecb_inline unsigned char
891ecb_byteorder_helper (void) 1022ecb_byteorder_helper (void)
892{ 1023{
893 const uint32_t u = 0x11223344; 1024 /* the union code still generates code under pressure in gcc, */
894 return *(unsigned char *)&u; 1025 /* but less than using pointers, and always seems to */
1026 /* successfully return a constant. */
1027 /* the reason why we have this horrible preprocessor mess */
1028 /* is to avoid it in all cases, at least on common architectures */
1029 /* or when using a recent enough gcc version (>= 4.6) */
1030#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1031 return 0x44;
1032#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1033 return 0x44;
1034#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1035 return 0x11;
1036#else
1037 union
1038 {
1039 uint32_t i;
1040 uint8_t c;
1041 } u = { 0x11223344 };
1042 return u.c;
1043#endif
895} 1044}
896 1045
897ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 1046ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
898ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 1047ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
899ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 1048ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
… …
930 } 1079 }
931#else 1080#else
932 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1081 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
933#endif 1082#endif
934 1083
1084/*******************************************************************************/
1085/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1086
1087/* basically, everything uses "ieee pure-endian" floating point numbers */
1088/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1089#if 0 \
1090 || __i386 || __i386__ \
1091 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1092 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1093 || defined __s390__ || defined __s390x__ \
1094 || defined __mips__ \
1095 || defined __alpha__ \
1096 || defined __hppa__ \
1097 || defined __ia64__ \
1098 || defined __m68k__ \
1099 || defined __m88k__ \
1100 || defined __sh__ \
1101 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1102 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1103 || defined __aarch64__
1104 #define ECB_STDFP 1
1105 #include <string.h> /* for memcpy */
1106#else
1107 #define ECB_STDFP 0
1108#endif
1109
1110#ifndef ECB_NO_LIBM
1111
1112 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1113
1114 /* only the oldest of old doesn't have this one. solaris. */
1115 #ifdef INFINITY
1116 #define ECB_INFINITY INFINITY
1117 #else
1118 #define ECB_INFINITY HUGE_VAL
1119 #endif
1120
1121 #ifdef NAN
1122 #define ECB_NAN NAN
1123 #else
1124 #define ECB_NAN ECB_INFINITY
1125 #endif
1126
1127 /* converts an ieee half/binary16 to a float */
1128 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1129 ecb_function_ float
1130 ecb_binary16_to_float (uint16_t x)
1131 {
1132 int e = (x >> 10) & 0x1f;
1133 int m = x & 0x3ff;
1134 float r;
1135
1136 if (!e ) r = ldexpf (m , -24);
1137 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1138 else if (m ) r = ECB_NAN;
1139 else r = ECB_INFINITY;
1140
1141 return x & 0x8000 ? -r : r;
1142 }
1143
1144 /* convert a float to ieee single/binary32 */
1145 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1146 ecb_function_ uint32_t
1147 ecb_float_to_binary32 (float x)
1148 {
1149 uint32_t r;
1150
1151 #if ECB_STDFP
1152 memcpy (&r, &x, 4);
1153 #else
1154 /* slow emulation, works for anything but -0 */
1155 uint32_t m;
1156 int e;
1157
1158 if (x == 0e0f ) return 0x00000000U;
1159 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1160 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1161 if (x != x ) return 0x7fbfffffU;
1162
1163 m = frexpf (x, &e) * 0x1000000U;
1164
1165 r = m & 0x80000000U;
1166
1167 if (r)
1168 m = -m;
1169
1170 if (e <= -126)
1171 {
1172 m &= 0xffffffU;
1173 m >>= (-125 - e);
1174 e = -126;
1175 }
1176
1177 r |= (e + 126) << 23;
1178 r |= m & 0x7fffffU;
1179 #endif
1180
1181 return r;
1182 }
1183
1184 /* converts an ieee single/binary32 to a float */
1185 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1186 ecb_function_ float
1187 ecb_binary32_to_float (uint32_t x)
1188 {
1189 float r;
1190
1191 #if ECB_STDFP
1192 memcpy (&r, &x, 4);
1193 #else
1194 /* emulation, only works for normals and subnormals and +0 */
1195 int neg = x >> 31;
1196 int e = (x >> 23) & 0xffU;
1197
1198 x &= 0x7fffffU;
1199
1200 if (e)
1201 x |= 0x800000U;
1202 else
1203 e = 1;
1204
1205 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1206 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1207
1208 r = neg ? -r : r;
1209 #endif
1210
1211 return r;
1212 }
1213
1214 /* convert a double to ieee double/binary64 */
1215 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1216 ecb_function_ uint64_t
1217 ecb_double_to_binary64 (double x)
1218 {
1219 uint64_t r;
1220
1221 #if ECB_STDFP
1222 memcpy (&r, &x, 8);
1223 #else
1224 /* slow emulation, works for anything but -0 */
1225 uint64_t m;
1226 int e;
1227
1228 if (x == 0e0 ) return 0x0000000000000000U;
1229 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1230 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1231 if (x != x ) return 0X7ff7ffffffffffffU;
1232
1233 m = frexp (x, &e) * 0x20000000000000U;
1234
1235 r = m & 0x8000000000000000;;
1236
1237 if (r)
1238 m = -m;
1239
1240 if (e <= -1022)
1241 {
1242 m &= 0x1fffffffffffffU;
1243 m >>= (-1021 - e);
1244 e = -1022;
1245 }
1246
1247 r |= ((uint64_t)(e + 1022)) << 52;
1248 r |= m & 0xfffffffffffffU;
1249 #endif
1250
1251 return r;
1252 }
1253
1254 /* converts an ieee double/binary64 to a double */
1255 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1256 ecb_function_ double
1257 ecb_binary64_to_double (uint64_t x)
1258 {
1259 double r;
1260
1261 #if ECB_STDFP
1262 memcpy (&r, &x, 8);
1263 #else
1264 /* emulation, only works for normals and subnormals and +0 */
1265 int neg = x >> 63;
1266 int e = (x >> 52) & 0x7ffU;
1267
1268 x &= 0xfffffffffffffU;
1269
1270 if (e)
1271 x |= 0x10000000000000U;
1272 else
1273 e = 1;
1274
1275 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1276 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1277
1278 r = neg ? -r : r;
1279 #endif
1280
1281 return r;
1282 }
1283
1284#endif
1285
935#endif 1286#endif
936 1287
937/* ECB.H END */ 1288/* ECB.H END */
938 1289
939#if ECB_MEMORY_FENCE_NEEDS_PTHREADS 1290#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
… …
1108#endif 1459#endif
1109 1460
1110static void (*syserr_cb)(const char *msg) EV_THROW; 1461static void (*syserr_cb)(const char *msg) EV_THROW;
1111 1462
1112void ecb_cold 1463void ecb_cold
1113ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW 1464ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1114{ 1465{
1115 syserr_cb = cb; 1466 syserr_cb = cb;
1116} 1467}
1117 1468
1118static void noinline ecb_cold 1469static void noinline ecb_cold
… …
1136 abort (); 1487 abort ();
1137 } 1488 }
1138} 1489}
1139 1490
1140static void * 1491static void *
1141ev_realloc_emul (void *ptr, long size) 1492ev_realloc_emul (void *ptr, long size) EV_THROW
1142{ 1493{
1143#if __GLIBC__
1144 return realloc (ptr, size);
1145#else
1146 /* some systems, notably openbsd and darwin, fail to properly 1494 /* some systems, notably openbsd and darwin, fail to properly
1147 * implement realloc (x, 0) (as required by both ansi c-89 and 1495 * implement realloc (x, 0) (as required by both ansi c-89 and
1148 * the single unix specification, so work around them here. 1496 * the single unix specification, so work around them here.
1497 * recently, also (at least) fedora and debian started breaking it,
1498 * despite documenting it otherwise.
1149 */ 1499 */
1150 1500
1151 if (size) 1501 if (size)
1152 return realloc (ptr, size); 1502 return realloc (ptr, size);
1153 1503
1154 free (ptr); 1504 free (ptr);
1155 return 0; 1505 return 0;
1156#endif
1157} 1506}
1158 1507
1159static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul; 1508static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1160 1509
1161void ecb_cold 1510void ecb_cold
1162ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW 1511ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1163{ 1512{
1164 alloc = cb; 1513 alloc = cb;
1165} 1514}
1166 1515
1167inline_speed void * 1516inline_speed void *
… …
1430 w_->pending = ++pendingcnt [pri]; 1779 w_->pending = ++pendingcnt [pri];
1431 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1780 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1432 pendings [pri][w_->pending - 1].w = w_; 1781 pendings [pri][w_->pending - 1].w = w_;
1433 pendings [pri][w_->pending - 1].events = revents; 1782 pendings [pri][w_->pending - 1].events = revents;
1434 } 1783 }
1784
1785 pendingpri = NUMPRI - 1;
1435} 1786}
1436 1787
1437inline_speed void 1788inline_speed void
1438feed_reverse (EV_P_ W w) 1789feed_reverse (EV_P_ W w)
1439{ 1790{
… …
1814static void noinline ecb_cold 2165static void noinline ecb_cold
1815evpipe_init (EV_P) 2166evpipe_init (EV_P)
1816{ 2167{
1817 if (!ev_is_active (&pipe_w)) 2168 if (!ev_is_active (&pipe_w))
1818 { 2169 {
2170 int fds [2];
2171
1819# if EV_USE_EVENTFD 2172# if EV_USE_EVENTFD
2173 fds [0] = -1;
1820 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2174 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1821 if (evfd < 0 && errno == EINVAL) 2175 if (fds [1] < 0 && errno == EINVAL)
1822 evfd = eventfd (0, 0); 2176 fds [1] = eventfd (0, 0);
1823 2177
1824 if (evfd >= 0) 2178 if (fds [1] < 0)
2179# endif
1825 { 2180 {
2181 while (pipe (fds))
2182 ev_syserr ("(libev) error creating signal/async pipe");
2183
2184 fd_intern (fds [0]);
2185 }
2186
1826 evpipe [0] = -1; 2187 evpipe [0] = fds [0];
1827 fd_intern (evfd); /* doing it twice doesn't hurt */ 2188
1828 ev_io_set (&pipe_w, evfd, EV_READ); 2189 if (evpipe [1] < 0)
2190 evpipe [1] = fds [1]; /* first call, set write fd */
2191 else
2192 {
2193 /* on subsequent calls, do not change evpipe [1] */
2194 /* so that evpipe_write can always rely on its value. */
2195 /* this branch does not do anything sensible on windows, */
2196 /* so must not be executed on windows */
2197
2198 dup2 (fds [1], evpipe [1]);
2199 close (fds [1]);
2200 }
2201
2202 fd_intern (evpipe [1]);
2203
2204 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2205 ev_io_start (EV_A_ &pipe_w);
2206 ev_unref (EV_A); /* watcher should not keep loop alive */
2207 }
2208}
2209
2210inline_speed void
2211evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2212{
2213 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2214
2215 if (expect_true (*flag))
2216 return;
2217
2218 *flag = 1;
2219 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2220
2221 pipe_write_skipped = 1;
2222
2223 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2224
2225 if (pipe_write_wanted)
2226 {
2227 int old_errno;
2228
2229 pipe_write_skipped = 0;
2230 ECB_MEMORY_FENCE_RELEASE;
2231
2232 old_errno = errno; /* save errno because write will clobber it */
2233
2234#if EV_USE_EVENTFD
2235 if (evpipe [0] < 0)
2236 {
2237 uint64_t counter = 1;
2238 write (evpipe [1], &counter, sizeof (uint64_t));
1829 } 2239 }
1830 else 2240 else
1831# endif 2241#endif
1832 { 2242 {
1833 while (pipe (evpipe)) 2243#ifdef _WIN32
1834 ev_syserr ("(libev) error creating signal/async pipe"); 2244 WSABUF buf;
1835 2245 DWORD sent;
1836 fd_intern (evpipe [0]); 2246 buf.buf = &buf;
1837 fd_intern (evpipe [1]); 2247 buf.len = 1;
1838 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2248 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1839 } 2249#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 if (expect_true (*flag))
1850 return;
1851
1852 *flag = 1;
1853
1854 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1855
1856 pipe_write_skipped = 1;
1857
1858 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1859
1860 if (pipe_write_wanted)
1861 {
1862 int old_errno;
1863
1864 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1865
1866 old_errno = errno; /* save errno because write will clobber it */
1867
1868#if EV_USE_EVENTFD
1869 if (evfd >= 0)
1870 {
1871 uint64_t counter = 1;
1872 write (evfd, &counter, sizeof (uint64_t));
1873 }
1874 else
1875#endif
1876 {
1877 /* win32 people keep sending patches that change this write() to send() */
1878 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1879 /* so when you think this write should be a send instead, please find out */
1880 /* where your send() is from - it's definitely not the microsoft send, and */
1881 /* tell me. thank you. */
1882 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1883 /* check the ev documentation on how to use this flag */
1884 write (evpipe [1], &(evpipe [1]), 1); 2250 write (evpipe [1], &(evpipe [1]), 1);
2251#endif
1885 } 2252 }
1886 2253
1887 errno = old_errno; 2254 errno = old_errno;
1888 } 2255 }
1889} 2256}
… …
1896 int i; 2263 int i;
1897 2264
1898 if (revents & EV_READ) 2265 if (revents & EV_READ)
1899 { 2266 {
1900#if EV_USE_EVENTFD 2267#if EV_USE_EVENTFD
1901 if (evfd >= 0) 2268 if (evpipe [0] < 0)
1902 { 2269 {
1903 uint64_t counter; 2270 uint64_t counter;
1904 read (evfd, &counter, sizeof (uint64_t)); 2271 read (evpipe [1], &counter, sizeof (uint64_t));
1905 } 2272 }
1906 else 2273 else
1907#endif 2274#endif
1908 { 2275 {
1909 char dummy; 2276 char dummy[4];
1910 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2277#ifdef _WIN32
2278 WSABUF buf;
2279 DWORD recvd;
2280 DWORD flags = 0;
2281 buf.buf = dummy;
2282 buf.len = sizeof (dummy);
2283 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2284#else
1911 read (evpipe [0], &dummy, 1); 2285 read (evpipe [0], &dummy, sizeof (dummy));
2286#endif
1912 } 2287 }
1913 } 2288 }
1914 2289
1915 pipe_write_skipped = 0; 2290 pipe_write_skipped = 0;
2291
2292 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1916 2293
1917#if EV_SIGNAL_ENABLE 2294#if EV_SIGNAL_ENABLE
1918 if (sig_pending) 2295 if (sig_pending)
1919 { 2296 {
1920 sig_pending = 0; 2297 sig_pending = 0;
2298
2299 ECB_MEMORY_FENCE;
1921 2300
1922 for (i = EV_NSIG - 1; i--; ) 2301 for (i = EV_NSIG - 1; i--; )
1923 if (expect_false (signals [i].pending)) 2302 if (expect_false (signals [i].pending))
1924 ev_feed_signal_event (EV_A_ i + 1); 2303 ev_feed_signal_event (EV_A_ i + 1);
1925 } 2304 }
… …
1927 2306
1928#if EV_ASYNC_ENABLE 2307#if EV_ASYNC_ENABLE
1929 if (async_pending) 2308 if (async_pending)
1930 { 2309 {
1931 async_pending = 0; 2310 async_pending = 0;
2311
2312 ECB_MEMORY_FENCE;
1932 2313
1933 for (i = asynccnt; i--; ) 2314 for (i = asynccnt; i--; )
1934 if (asyncs [i]->sent) 2315 if (asyncs [i]->sent)
1935 { 2316 {
1936 asyncs [i]->sent = 0; 2317 asyncs [i]->sent = 0;
2318 ECB_MEMORY_FENCE_RELEASE;
1937 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2319 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1938 } 2320 }
1939 } 2321 }
1940#endif 2322#endif
1941} 2323}
… …
1944 2326
1945void 2327void
1946ev_feed_signal (int signum) EV_THROW 2328ev_feed_signal (int signum) EV_THROW
1947{ 2329{
1948#if EV_MULTIPLICITY 2330#if EV_MULTIPLICITY
2331 EV_P;
2332 ECB_MEMORY_FENCE_ACQUIRE;
1949 EV_P = signals [signum - 1].loop; 2333 EV_A = signals [signum - 1].loop;
1950 2334
1951 if (!EV_A) 2335 if (!EV_A)
1952 return; 2336 return;
1953#endif 2337#endif
1954 2338
1955 if (!ev_active (&pipe_w))
1956 return;
1957
1958 signals [signum - 1].pending = 1; 2339 signals [signum - 1].pending = 1;
1959 evpipe_write (EV_A_ &sig_pending); 2340 evpipe_write (EV_A_ &sig_pending);
1960} 2341}
1961 2342
1962static void 2343static void
… …
1972void noinline 2353void noinline
1973ev_feed_signal_event (EV_P_ int signum) EV_THROW 2354ev_feed_signal_event (EV_P_ int signum) EV_THROW
1974{ 2355{
1975 WL w; 2356 WL w;
1976 2357
1977 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2358 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1978 return; 2359 return;
1979 2360
1980 --signum; 2361 --signum;
1981 2362
1982#if EV_MULTIPLICITY 2363#if EV_MULTIPLICITY
… …
1986 if (expect_false (signals [signum].loop != EV_A)) 2367 if (expect_false (signals [signum].loop != EV_A))
1987 return; 2368 return;
1988#endif 2369#endif
1989 2370
1990 signals [signum].pending = 0; 2371 signals [signum].pending = 0;
2372 ECB_MEMORY_FENCE_RELEASE;
1991 2373
1992 for (w = signals [signum].head; w; w = w->next) 2374 for (w = signals [signum].head; w; w = w->next)
1993 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2375 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1994} 2376}
1995 2377
… …
2209{ 2591{
2210 return userdata; 2592 return userdata;
2211} 2593}
2212 2594
2213void 2595void
2214ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW 2596ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2215{ 2597{
2216 invoke_cb = invoke_pending_cb; 2598 invoke_cb = invoke_pending_cb;
2217} 2599}
2218 2600
2219void 2601void
2220ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW 2602ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
2221{ 2603{
2222 release_cb = release; 2604 release_cb = release;
2223 acquire_cb = acquire; 2605 acquire_cb = acquire;
2224} 2606}
2225#endif 2607#endif
… …
2279#if EV_ASYNC_ENABLE 2661#if EV_ASYNC_ENABLE
2280 async_pending = 0; 2662 async_pending = 0;
2281#endif 2663#endif
2282 pipe_write_skipped = 0; 2664 pipe_write_skipped = 0;
2283 pipe_write_wanted = 0; 2665 pipe_write_wanted = 0;
2666 evpipe [0] = -1;
2667 evpipe [1] = -1;
2284#if EV_USE_INOTIFY 2668#if EV_USE_INOTIFY
2285 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2669 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2286#endif 2670#endif
2287#if EV_USE_SIGNALFD 2671#if EV_USE_SIGNALFD
2288 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2672 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
… …
2339 EV_INVOKE_PENDING; 2723 EV_INVOKE_PENDING;
2340 } 2724 }
2341#endif 2725#endif
2342 2726
2343#if EV_CHILD_ENABLE 2727#if EV_CHILD_ENABLE
2344 if (ev_is_active (&childev)) 2728 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2345 { 2729 {
2346 ev_ref (EV_A); /* child watcher */ 2730 ev_ref (EV_A); /* child watcher */
2347 ev_signal_stop (EV_A_ &childev); 2731 ev_signal_stop (EV_A_ &childev);
2348 } 2732 }
2349#endif 2733#endif
… …
2351 if (ev_is_active (&pipe_w)) 2735 if (ev_is_active (&pipe_w))
2352 { 2736 {
2353 /*ev_ref (EV_A);*/ 2737 /*ev_ref (EV_A);*/
2354 /*ev_io_stop (EV_A_ &pipe_w);*/ 2738 /*ev_io_stop (EV_A_ &pipe_w);*/
2355 2739
2356#if EV_USE_EVENTFD
2357 if (evfd >= 0)
2358 close (evfd);
2359#endif
2360
2361 if (evpipe [0] >= 0)
2362 {
2363 EV_WIN32_CLOSE_FD (evpipe [0]); 2740 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2364 EV_WIN32_CLOSE_FD (evpipe [1]); 2741 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2365 }
2366 } 2742 }
2367 2743
2368#if EV_USE_SIGNALFD 2744#if EV_USE_SIGNALFD
2369 if (ev_is_active (&sigfd_w)) 2745 if (ev_is_active (&sigfd_w))
2370 close (sigfd); 2746 close (sigfd);
… …
2456#endif 2832#endif
2457#if EV_USE_INOTIFY 2833#if EV_USE_INOTIFY
2458 infy_fork (EV_A); 2834 infy_fork (EV_A);
2459#endif 2835#endif
2460 2836
2837#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2461 if (ev_is_active (&pipe_w)) 2838 if (ev_is_active (&pipe_w))
2462 { 2839 {
2463 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 2840 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2464 2841
2465 ev_ref (EV_A); 2842 ev_ref (EV_A);
2466 ev_io_stop (EV_A_ &pipe_w); 2843 ev_io_stop (EV_A_ &pipe_w);
2467 2844
2468#if EV_USE_EVENTFD
2469 if (evfd >= 0)
2470 close (evfd);
2471#endif
2472
2473 if (evpipe [0] >= 0) 2845 if (evpipe [0] >= 0)
2474 {
2475 EV_WIN32_CLOSE_FD (evpipe [0]); 2846 EV_WIN32_CLOSE_FD (evpipe [0]);
2476 EV_WIN32_CLOSE_FD (evpipe [1]);
2477 }
2478 2847
2479#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2480 evpipe_init (EV_A); 2848 evpipe_init (EV_A);
2481 /* now iterate over everything, in case we missed something */ 2849 /* iterate over everything, in case we missed something before */
2482 pipecb (EV_A_ &pipe_w, EV_READ); 2850 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2483#endif
2484 } 2851 }
2852#endif
2485 2853
2486 postfork = 0; 2854 postfork = 0;
2487} 2855}
2488 2856
2489#if EV_MULTIPLICITY 2857#if EV_MULTIPLICITY
… …
2545void ecb_cold 2913void ecb_cold
2546ev_verify (EV_P) EV_THROW 2914ev_verify (EV_P) EV_THROW
2547{ 2915{
2548#if EV_VERIFY 2916#if EV_VERIFY
2549 int i; 2917 int i;
2550 WL w; 2918 WL w, w2;
2551 2919
2552 assert (activecnt >= -1); 2920 assert (activecnt >= -1);
2553 2921
2554 assert (fdchangemax >= fdchangecnt); 2922 assert (fdchangemax >= fdchangecnt);
2555 for (i = 0; i < fdchangecnt; ++i) 2923 for (i = 0; i < fdchangecnt; ++i)
2556 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2924 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2557 2925
2558 assert (anfdmax >= 0); 2926 assert (anfdmax >= 0);
2559 for (i = 0; i < anfdmax; ++i) 2927 for (i = 0; i < anfdmax; ++i)
2928 {
2929 int j = 0;
2930
2560 for (w = anfds [i].head; w; w = w->next) 2931 for (w = w2 = anfds [i].head; w; w = w->next)
2561 { 2932 {
2562 verify_watcher (EV_A_ (W)w); 2933 verify_watcher (EV_A_ (W)w);
2934
2935 if (j++ & 1)
2936 {
2937 assert (("libev: io watcher list contains a loop", w != w2));
2938 w2 = w2->next;
2939 }
2940
2563 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2941 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2564 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2942 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2565 } 2943 }
2944 }
2566 2945
2567 assert (timermax >= timercnt); 2946 assert (timermax >= timercnt);
2568 verify_heap (EV_A_ timers, timercnt); 2947 verify_heap (EV_A_ timers, timercnt);
2569 2948
2570#if EV_PERIODIC_ENABLE 2949#if EV_PERIODIC_ENABLE
… …
2651} 3030}
2652 3031
2653void 3032void
2654ev_loop_fork (EV_P) EV_THROW 3033ev_loop_fork (EV_P) EV_THROW
2655{ 3034{
2656 postfork = 1; /* must be in line with ev_default_fork */ 3035 postfork = 1;
2657} 3036}
2658 3037
2659/*****************************************************************************/ 3038/*****************************************************************************/
2660 3039
2661void 3040void
… …
2677} 3056}
2678 3057
2679void noinline 3058void noinline
2680ev_invoke_pending (EV_P) 3059ev_invoke_pending (EV_P)
2681{ 3060{
2682 int pri; 3061 pendingpri = NUMPRI;
2683 3062
2684 for (pri = NUMPRI; pri--; ) 3063 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3064 {
3065 --pendingpri;
3066
2685 while (pendingcnt [pri]) 3067 while (pendingcnt [pendingpri])
2686 { 3068 {
2687 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3069 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2688 3070
2689 p->w->pending = 0; 3071 p->w->pending = 0;
2690 EV_CB_INVOKE (p->w, p->events); 3072 EV_CB_INVOKE (p->w, p->events);
2691 EV_FREQUENT_CHECK; 3073 EV_FREQUENT_CHECK;
2692 } 3074 }
3075 }
2693} 3076}
2694 3077
2695#if EV_IDLE_ENABLE 3078#if EV_IDLE_ENABLE
2696/* make idle watchers pending. this handles the "call-idle */ 3079/* make idle watchers pending. this handles the "call-idle */
2697/* only when higher priorities are idle" logic */ 3080/* only when higher priorities are idle" logic */
… …
2787{ 3170{
2788 EV_FREQUENT_CHECK; 3171 EV_FREQUENT_CHECK;
2789 3172
2790 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3173 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2791 { 3174 {
2792 int feed_count = 0;
2793
2794 do 3175 do
2795 { 3176 {
2796 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3177 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2797 3178
2798 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3179 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
3057 backend_poll (EV_A_ waittime); 3438 backend_poll (EV_A_ waittime);
3058 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3439 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3059 3440
3060 pipe_write_wanted = 0; /* just an optimisation, no fence needed */ 3441 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3061 3442
3443 ECB_MEMORY_FENCE_ACQUIRE;
3062 if (pipe_write_skipped) 3444 if (pipe_write_skipped)
3063 { 3445 {
3064 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); 3446 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3065 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3447 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3066 } 3448 }
… …
3241 EV_FREQUENT_CHECK; 3623 EV_FREQUENT_CHECK;
3242 3624
3243 ev_start (EV_A_ (W)w, 1); 3625 ev_start (EV_A_ (W)w, 1);
3244 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3626 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3245 wlist_add (&anfds[fd].head, (WL)w); 3627 wlist_add (&anfds[fd].head, (WL)w);
3628
3629 /* common bug, apparently */
3630 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3246 3631
3247 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3632 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3248 w->events &= ~EV__IOFDSET; 3633 w->events &= ~EV__IOFDSET;
3249 3634
3250 EV_FREQUENT_CHECK; 3635 EV_FREQUENT_CHECK;
… …
3441#if EV_MULTIPLICITY 3826#if EV_MULTIPLICITY
3442 assert (("libev: a signal must not be attached to two different loops", 3827 assert (("libev: a signal must not be attached to two different loops",
3443 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3828 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3444 3829
3445 signals [w->signum - 1].loop = EV_A; 3830 signals [w->signum - 1].loop = EV_A;
3831 ECB_MEMORY_FENCE_RELEASE;
3446#endif 3832#endif
3447 3833
3448 EV_FREQUENT_CHECK; 3834 EV_FREQUENT_CHECK;
3449 3835
3450#if EV_USE_SIGNALFD 3836#if EV_USE_SIGNALFD
… …
3605# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3991# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3606 3992
3607static void noinline 3993static void noinline
3608infy_add (EV_P_ ev_stat *w) 3994infy_add (EV_P_ ev_stat *w)
3609{ 3995{
3610 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); 3996 w->wd = inotify_add_watch (fs_fd, w->path,
3997 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3998 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3999 | IN_DONT_FOLLOW | IN_MASK_ADD);
3611 4000
3612 if (w->wd >= 0) 4001 if (w->wd >= 0)
3613 { 4002 {
3614 struct statfs sfs; 4003 struct statfs sfs;
3615 4004
… …
3619 4008
3620 if (!fs_2625) 4009 if (!fs_2625)
3621 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4010 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3622 else if (!statfs (w->path, &sfs) 4011 else if (!statfs (w->path, &sfs)
3623 && (sfs.f_type == 0x1373 /* devfs */ 4012 && (sfs.f_type == 0x1373 /* devfs */
4013 || sfs.f_type == 0x4006 /* fat */
4014 || sfs.f_type == 0x4d44 /* msdos */
3624 || sfs.f_type == 0xEF53 /* ext2/3 */ 4015 || sfs.f_type == 0xEF53 /* ext2/3 */
4016 || sfs.f_type == 0x72b6 /* jffs2 */
4017 || sfs.f_type == 0x858458f6 /* ramfs */
4018 || sfs.f_type == 0x5346544e /* ntfs */
3625 || sfs.f_type == 0x3153464a /* jfs */ 4019 || sfs.f_type == 0x3153464a /* jfs */
4020 || sfs.f_type == 0x9123683e /* btrfs */
3626 || sfs.f_type == 0x52654973 /* reiser3 */ 4021 || sfs.f_type == 0x52654973 /* reiser3 */
3627 || sfs.f_type == 0x01021994 /* tempfs */ 4022 || sfs.f_type == 0x01021994 /* tmpfs */
3628 || sfs.f_type == 0x58465342 /* xfs */)) 4023 || sfs.f_type == 0x58465342 /* xfs */))
3629 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4024 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3630 else 4025 else
3631 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4026 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3632 } 4027 }

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