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Comparing libev/ev.c (file contents):
Revision 1.386 by root, Wed Jul 20 01:04:20 2011 UTC vs.
Revision 1.461 by root, Fri Dec 27 06:01:22 2013 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
59# endif 59# endif
60# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
62# endif 62# endif
63# endif 63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
66# endif 66# endif
67 67
68# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
183# include EV_H 183# include EV_H
184#else 184#else
185# include "ev.h" 185# include "ev.h"
186#endif 186#endif
187 187
188EV_CPP(extern "C" {) 188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
189 198
190#ifndef _WIN32 199#ifndef _WIN32
191# include <sys/time.h> 200# include <sys/time.h>
192# include <sys/wait.h> 201# include <sys/wait.h>
193# include <unistd.h> 202# include <unistd.h>
194#else 203#else
195# include <io.h> 204# include <io.h>
196# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
197# include <windows.h> 207# include <windows.h>
198# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
199# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
200# endif 210# endif
201# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
210#define _DARWIN_UNLIMITED_SELECT 1 220#define _DARWIN_UNLIMITED_SELECT 1
211 221
212/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
213 223
214/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG) 225#if defined EV_NSIG
216/* use what's provided */ 226/* use what's provided */
217#elif defined (NSIG) 227#elif defined NSIG
218# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
219#elif defined(_NSIG) 229#elif defined _NSIG
220# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX) 231#elif defined SIGMAX
222# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX) 233#elif defined SIG_MAX
224# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
226# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG) 237#elif defined MAXSIG
228# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG) 239#elif defined MAX_SIG
230# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig) 243#elif defined _sys_nsig
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else 245#else
236# error "unable to find value for NSIG, please report" 246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif 247#endif
241 248
242#ifndef EV_USE_FLOOR 249#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0 250# define EV_USE_FLOOR 0
244#endif 251#endif
245 252
246#ifndef EV_USE_CLOCK_SYSCALL 253#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2 254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else 256# else
250# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
251# endif 258# endif
252#endif 259#endif
253 260
254#ifndef EV_USE_MONOTONIC 261#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 262# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS 263# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else 264# else
258# define EV_USE_MONOTONIC 0 265# define EV_USE_MONOTONIC 0
259# endif 266# endif
260#endif 267#endif
… …
347 354
348#ifndef EV_HEAP_CACHE_AT 355#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 356# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif 357#endif
351 358
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
352/* 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, */
353/* which makes programs even slower. might work on other unices, too. */ 376/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL 377#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h> 378# include <sys/syscall.h>
356# ifdef SYS_clock_gettime 379# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 380# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC 381# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1 382# define EV_USE_MONOTONIC 1
360# else 383# else
… …
363# endif 386# endif
364#endif 387#endif
365 388
366/* 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 */
367 390
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
373
374#ifndef CLOCK_MONOTONIC 391#ifndef CLOCK_MONOTONIC
375# undef EV_USE_MONOTONIC 392# undef EV_USE_MONOTONIC
376# define EV_USE_MONOTONIC 0 393# define EV_USE_MONOTONIC 0
377#endif 394#endif
378 395
… …
386# define EV_USE_INOTIFY 0 403# define EV_USE_INOTIFY 0
387#endif 404#endif
388 405
389#if !EV_USE_NANOSLEEP 406#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */ 407/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux) 408# if !defined _WIN32 && !defined __hpux
392# include <sys/select.h> 409# include <sys/select.h>
393# endif 410# endif
394#endif 411#endif
395 412
396#if EV_USE_INOTIFY 413#if EV_USE_INOTIFY
… …
399/* 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 */
400# ifndef IN_DONT_FOLLOW 417# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY 418# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0 419# define EV_USE_INOTIFY 0
403# endif 420# endif
404#endif
405
406#if EV_SELECT_IS_WINSOCKET
407# include <winsock.h>
408#endif 421#endif
409 422
410#if EV_USE_EVENTFD 423#if EV_USE_EVENTFD
411/* 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 */
412# include <stdint.h> 425# include <stdint.h>
… …
464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 477#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
465 478
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 479#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 480#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
468 481
469/* the following are taken from libecb */ 482/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ecb.h start */ 483/* ECB.H BEGIN */
484/*
485 * libecb - http://software.schmorp.de/pkg/libecb
486 *
487 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
488 * Copyright (©) 2011 Emanuele Giaquinta
489 * All rights reserved.
490 *
491 * Redistribution and use in source and binary forms, with or without modifica-
492 * tion, are permitted provided that the following conditions are met:
493 *
494 * 1. Redistributions of source code must retain the above copyright notice,
495 * this list of conditions and the following disclaimer.
496 *
497 * 2. Redistributions in binary form must reproduce the above copyright
498 * notice, this list of conditions and the following disclaimer in the
499 * documentation and/or other materials provided with the distribution.
500 *
501 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
502 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
503 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
504 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
505 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
506 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
507 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
508 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
509 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
510 * OF THE POSSIBILITY OF SUCH DAMAGE.
511 */
512
513#ifndef ECB_H
514#define ECB_H
515
516/* 16 bits major, 16 bits minor */
517#define ECB_VERSION 0x00010003
518
519#ifdef _WIN32
520 typedef signed char int8_t;
521 typedef unsigned char uint8_t;
522 typedef signed short int16_t;
523 typedef unsigned short uint16_t;
524 typedef signed int int32_t;
525 typedef unsigned int uint32_t;
526 #if __GNUC__
527 typedef signed long long int64_t;
528 typedef unsigned long long uint64_t;
529 #else /* _MSC_VER || __BORLANDC__ */
530 typedef signed __int64 int64_t;
531 typedef unsigned __int64 uint64_t;
532 #endif
533 #ifdef _WIN64
534 #define ECB_PTRSIZE 8
535 typedef uint64_t uintptr_t;
536 typedef int64_t intptr_t;
537 #else
538 #define ECB_PTRSIZE 4
539 typedef uint32_t uintptr_t;
540 typedef int32_t intptr_t;
541 #endif
542#else
543 #include <inttypes.h>
544 #if UINTMAX_MAX > 0xffffffffU
545 #define ECB_PTRSIZE 8
546 #else
547 #define ECB_PTRSIZE 4
548 #endif
549#endif
550
551/* work around x32 idiocy by defining proper macros */
552#if __x86_64 || _M_AMD64
553 #if _ILP32
554 #define ECB_AMD64_X32 1
555 #else
556 #define ECB_AMD64 1
557 #endif
558#endif
471 559
472/* many compilers define _GNUC_ to some versions but then only implement 560/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions, 561 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers. 562 * causing enormous grief in return for some better fake benchmark numbers.
475 * or so. 563 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have 564 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place. 565 * an issue with that they should have done it right in the first place.
478 */ 566 */
479#ifndef ECB_GCC_VERSION 567#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) 568 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
481 #define ECB_GCC_VERSION(major,minor) 0 569 #define ECB_GCC_VERSION(major,minor) 0
482 #else 570 #else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 571 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
484 #endif 572 #endif
485#endif 573#endif
574
575#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
576#define ECB_C99 (__STDC_VERSION__ >= 199901L)
577#define ECB_C11 (__STDC_VERSION__ >= 201112L)
578#define ECB_CPP (__cplusplus+0)
579#define ECB_CPP11 (__cplusplus >= 201103L)
580
581#if ECB_CPP
582 #define ECB_EXTERN_C extern "C"
583 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
584 #define ECB_EXTERN_C_END }
585#else
586 #define ECB_EXTERN_C extern
587 #define ECB_EXTERN_C_BEG
588 #define ECB_EXTERN_C_END
589#endif
590
591/*****************************************************************************/
592
593/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
594/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
595
596#if ECB_NO_THREADS
597 #define ECB_NO_SMP 1
598#endif
599
600#if ECB_NO_SMP
601 #define ECB_MEMORY_FENCE do { } while (0)
602#endif
603
604#ifndef ECB_MEMORY_FENCE
605 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
606 #if __i386 || __i386__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
608 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
610 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
612 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
613 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
614 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
615 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
616 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
617 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
618 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
619 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
620 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
622 #elif __sparc || __sparc__
623 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
624 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
625 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
626 #elif defined __s390__ || defined __s390x__
627 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
628 #elif defined __mips__
629 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
630 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
631 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
632 #elif defined __alpha__
633 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
634 #elif defined __hppa__
635 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
636 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
637 #elif defined __ia64__
638 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
639 #elif defined __m68k__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
641 #elif defined __m88k__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
643 #elif defined __sh__
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
645 #endif
646 #endif
647#endif
648
649#ifndef ECB_MEMORY_FENCE
650 #if ECB_GCC_VERSION(4,7)
651 /* see comment below (stdatomic.h) about the C11 memory model. */
652 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
653
654 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
655 * without risking compile time errors with other compilers. We *could*
656 * define our own ecb_clang_has_feature, but I just can't be bothered to work
657 * around this shit time and again.
658 * #elif defined __clang && __has_feature (cxx_atomic)
659 * // see comment below (stdatomic.h) about the C11 memory model.
660 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
661 */
662
663 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
664 #define ECB_MEMORY_FENCE __sync_synchronize ()
665 #elif _MSC_VER >= 1400 /* VC++ 2005 */
666 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
667 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
668 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
669 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
670 #elif defined _WIN32
671 #include <WinNT.h>
672 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
673 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
674 #include <mbarrier.h>
675 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
676 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
677 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
678 #elif __xlC__
679 #define ECB_MEMORY_FENCE __sync ()
680 #endif
681#endif
682
683#ifndef ECB_MEMORY_FENCE
684 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
685 /* we assume that these memory fences work on all variables/all memory accesses, */
686 /* not just C11 atomics and atomic accesses */
687 #include <stdatomic.h>
688 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
689 /* any fence other than seq_cst, which isn't very efficient for us. */
690 /* Why that is, we don't know - either the C11 memory model is quite useless */
691 /* for most usages, or gcc and clang have a bug */
692 /* I *currently* lean towards the latter, and inefficiently implement */
693 /* all three of ecb's fences as a seq_cst fence */
694 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
695 #endif
696#endif
697
698#ifndef ECB_MEMORY_FENCE
699 #if !ECB_AVOID_PTHREADS
700 /*
701 * if you get undefined symbol references to pthread_mutex_lock,
702 * or failure to find pthread.h, then you should implement
703 * the ECB_MEMORY_FENCE operations for your cpu/compiler
704 * OR provide pthread.h and link against the posix thread library
705 * of your system.
706 */
707 #include <pthread.h>
708 #define ECB_NEEDS_PTHREADS 1
709 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
710
711 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
712 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
713 #endif
714#endif
715
716#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
717 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
718#endif
719
720#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
721 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
722#endif
723
724/*****************************************************************************/
486 725
487#if __cplusplus 726#if __cplusplus
488 #define ecb_inline static inline 727 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5) 728#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__ 729 #define ecb_inline static __inline__
… …
492 #define ecb_inline static inline 731 #define ecb_inline static inline
493#else 732#else
494 #define ecb_inline static 733 #define ecb_inline static
495#endif 734#endif
496 735
497#ifndef ECB_MEMORY_FENCE
498 #if ECB_GCC_VERSION(2,5) 736#if ECB_GCC_VERSION(3,3)
499 #if __x86 737 #define ecb_restrict __restrict__
500 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 738#elif ECB_C99
501 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 739 #define ecb_restrict restrict
502 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 740#else
503 #elif __amd64 741 #define ecb_restrict
504 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
505 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
506 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
507 #endif
508 #endif 742#endif
509#endif
510 743
511#ifndef ECB_MEMORY_FENCE 744typedef int ecb_bool;
512 #if ECB_GCC_VERSION(4,4)
513 #define ECB_MEMORY_FENCE __sync_synchronize ()
514 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
515 #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
516 #elif defined(_WIN32) && defined(MemoryBarrier)
517 #define ECB_MEMORY_FENCE MemoryBarrier ()
518 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
519 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
520 #endif
521#endif
522 745
523#ifndef ECB_MEMORY_FENCE 746#define ECB_CONCAT_(a, b) a ## b
524 #include <pthread.h> 747#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
748#define ECB_STRINGIFY_(a) # a
749#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
525 750
526 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; 751#define ecb_function_ ecb_inline
527 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
528 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
529 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
530#endif
531 752
532#if ECB_GCC_VERSION(3,1) 753#if ECB_GCC_VERSION(3,1)
533 #define ecb_attribute(attrlist) __attribute__(attrlist) 754 #define ecb_attribute(attrlist) __attribute__(attrlist)
534 #define ecb_is_constant(expr) __builtin_constant_p (expr) 755 #define ecb_is_constant(expr) __builtin_constant_p (expr)
535 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 756 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
… …
539 #define ecb_is_constant(expr) 0 760 #define ecb_is_constant(expr) 0
540 #define ecb_expect(expr,value) (expr) 761 #define ecb_expect(expr,value) (expr)
541 #define ecb_prefetch(addr,rw,locality) 762 #define ecb_prefetch(addr,rw,locality)
542#endif 763#endif
543 764
765/* no emulation for ecb_decltype */
766#if ECB_GCC_VERSION(4,5)
767 #define ecb_decltype(x) __decltype(x)
768#elif ECB_GCC_VERSION(3,0)
769 #define ecb_decltype(x) __typeof(x)
770#endif
771
544#define ecb_noinline ecb_attribute ((__noinline__)) 772#define ecb_noinline ecb_attribute ((__noinline__))
545#define ecb_noreturn ecb_attribute ((__noreturn__))
546#define ecb_unused ecb_attribute ((__unused__)) 773#define ecb_unused ecb_attribute ((__unused__))
547#define ecb_const ecb_attribute ((__const__)) 774#define ecb_const ecb_attribute ((__const__))
548#define ecb_pure ecb_attribute ((__pure__)) 775#define ecb_pure ecb_attribute ((__pure__))
776
777#if ECB_C11
778 #define ecb_noreturn _Noreturn
779#else
780 #define ecb_noreturn ecb_attribute ((__noreturn__))
781#endif
549 782
550#if ECB_GCC_VERSION(4,3) 783#if ECB_GCC_VERSION(4,3)
551 #define ecb_artificial ecb_attribute ((__artificial__)) 784 #define ecb_artificial ecb_attribute ((__artificial__))
552 #define ecb_hot ecb_attribute ((__hot__)) 785 #define ecb_hot ecb_attribute ((__hot__))
553 #define ecb_cold ecb_attribute ((__cold__)) 786 #define ecb_cold ecb_attribute ((__cold__))
… …
560/* put around conditional expressions if you are very sure that the */ 793/* put around conditional expressions if you are very sure that the */
561/* expression is mostly true or mostly false. note that these return */ 794/* expression is mostly true or mostly false. note that these return */
562/* booleans, not the expression. */ 795/* booleans, not the expression. */
563#define ecb_expect_false(expr) ecb_expect (!!(expr), 0) 796#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
564#define ecb_expect_true(expr) ecb_expect (!!(expr), 1) 797#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
565/* ecb.h end */ 798/* for compatibility to the rest of the world */
799#define ecb_likely(expr) ecb_expect_true (expr)
800#define ecb_unlikely(expr) ecb_expect_false (expr)
801
802/* count trailing zero bits and count # of one bits */
803#if ECB_GCC_VERSION(3,4)
804 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
805 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
806 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
807 #define ecb_ctz32(x) __builtin_ctz (x)
808 #define ecb_ctz64(x) __builtin_ctzll (x)
809 #define ecb_popcount32(x) __builtin_popcount (x)
810 /* no popcountll */
811#else
812 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
813 ecb_function_ int
814 ecb_ctz32 (uint32_t x)
815 {
816 int r = 0;
817
818 x &= ~x + 1; /* this isolates the lowest bit */
819
820#if ECB_branchless_on_i386
821 r += !!(x & 0xaaaaaaaa) << 0;
822 r += !!(x & 0xcccccccc) << 1;
823 r += !!(x & 0xf0f0f0f0) << 2;
824 r += !!(x & 0xff00ff00) << 3;
825 r += !!(x & 0xffff0000) << 4;
826#else
827 if (x & 0xaaaaaaaa) r += 1;
828 if (x & 0xcccccccc) r += 2;
829 if (x & 0xf0f0f0f0) r += 4;
830 if (x & 0xff00ff00) r += 8;
831 if (x & 0xffff0000) r += 16;
832#endif
833
834 return r;
835 }
836
837 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
838 ecb_function_ int
839 ecb_ctz64 (uint64_t x)
840 {
841 int shift = x & 0xffffffffU ? 0 : 32;
842 return ecb_ctz32 (x >> shift) + shift;
843 }
844
845 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
846 ecb_function_ int
847 ecb_popcount32 (uint32_t x)
848 {
849 x -= (x >> 1) & 0x55555555;
850 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
851 x = ((x >> 4) + x) & 0x0f0f0f0f;
852 x *= 0x01010101;
853
854 return x >> 24;
855 }
856
857 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
858 ecb_function_ int ecb_ld32 (uint32_t x)
859 {
860 int r = 0;
861
862 if (x >> 16) { x >>= 16; r += 16; }
863 if (x >> 8) { x >>= 8; r += 8; }
864 if (x >> 4) { x >>= 4; r += 4; }
865 if (x >> 2) { x >>= 2; r += 2; }
866 if (x >> 1) { r += 1; }
867
868 return r;
869 }
870
871 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
872 ecb_function_ int ecb_ld64 (uint64_t x)
873 {
874 int r = 0;
875
876 if (x >> 32) { x >>= 32; r += 32; }
877
878 return r + ecb_ld32 (x);
879 }
880#endif
881
882ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
883ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
884ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
885ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
886
887ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
888ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
889{
890 return ( (x * 0x0802U & 0x22110U)
891 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
892}
893
894ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
895ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
896{
897 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
898 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
899 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
900 x = ( x >> 8 ) | ( x << 8);
901
902 return x;
903}
904
905ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
906ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
907{
908 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
909 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
910 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
911 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
912 x = ( x >> 16 ) | ( x << 16);
913
914 return x;
915}
916
917/* popcount64 is only available on 64 bit cpus as gcc builtin */
918/* so for this version we are lazy */
919ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
920ecb_function_ int
921ecb_popcount64 (uint64_t x)
922{
923 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
924}
925
926ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
927ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
928ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
929ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
930ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
931ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
932ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
933ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
934
935ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
936ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
937ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
938ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
939ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
940ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
941ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
942ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
943
944#if ECB_GCC_VERSION(4,3)
945 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
946 #define ecb_bswap32(x) __builtin_bswap32 (x)
947 #define ecb_bswap64(x) __builtin_bswap64 (x)
948#else
949 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
950 ecb_function_ uint16_t
951 ecb_bswap16 (uint16_t x)
952 {
953 return ecb_rotl16 (x, 8);
954 }
955
956 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
957 ecb_function_ uint32_t
958 ecb_bswap32 (uint32_t x)
959 {
960 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
961 }
962
963 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
964 ecb_function_ uint64_t
965 ecb_bswap64 (uint64_t x)
966 {
967 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
968 }
969#endif
970
971#if ECB_GCC_VERSION(4,5)
972 #define ecb_unreachable() __builtin_unreachable ()
973#else
974 /* this seems to work fine, but gcc always emits a warning for it :/ */
975 ecb_inline void ecb_unreachable (void) ecb_noreturn;
976 ecb_inline void ecb_unreachable (void) { }
977#endif
978
979/* try to tell the compiler that some condition is definitely true */
980#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
981
982ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
983ecb_inline unsigned char
984ecb_byteorder_helper (void)
985{
986 /* the union code still generates code under pressure in gcc, */
987 /* but less than using pointers, and always seems to */
988 /* successfully return a constant. */
989 /* the reason why we have this horrible preprocessor mess */
990 /* is to avoid it in all cases, at least on common architectures */
991 /* or when using a recent enough gcc version (>= 4.6) */
992#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
993 return 0x44;
994#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
995 return 0x44;
996#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
997 return 0x11;
998#else
999 union
1000 {
1001 uint32_t i;
1002 uint8_t c;
1003 } u = { 0x11223344 };
1004 return u.c;
1005#endif
1006}
1007
1008ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1009ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1010ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1011ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1012
1013#if ECB_GCC_VERSION(3,0) || ECB_C99
1014 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1015#else
1016 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1017#endif
1018
1019#if __cplusplus
1020 template<typename T>
1021 static inline T ecb_div_rd (T val, T div)
1022 {
1023 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1024 }
1025 template<typename T>
1026 static inline T ecb_div_ru (T val, T div)
1027 {
1028 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1029 }
1030#else
1031 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1032 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1033#endif
1034
1035#if ecb_cplusplus_does_not_suck
1036 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1037 template<typename T, int N>
1038 static inline int ecb_array_length (const T (&arr)[N])
1039 {
1040 return N;
1041 }
1042#else
1043 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1044#endif
1045
1046/*******************************************************************************/
1047/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1048
1049/* basically, everything uses "ieee pure-endian" floating point numbers */
1050/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1051#if 0 \
1052 || __i386 || __i386__ \
1053 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1054 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1055 || defined __arm__ && defined __ARM_EABI__ \
1056 || defined __s390__ || defined __s390x__ \
1057 || defined __mips__ \
1058 || defined __alpha__ \
1059 || defined __hppa__ \
1060 || defined __ia64__ \
1061 || defined __m68k__ \
1062 || defined __m88k__ \
1063 || defined __sh__ \
1064 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1065 #define ECB_STDFP 1
1066 #include <string.h> /* for memcpy */
1067#else
1068 #define ECB_STDFP 0
1069#endif
1070
1071#ifndef ECB_NO_LIBM
1072
1073 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1074
1075 #ifdef NEN
1076 #define ECB_NAN NAN
1077 #else
1078 #define ECB_NAN INFINITY
1079 #endif
1080
1081 /* converts an ieee half/binary16 to a float */
1082 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1083 ecb_function_ float
1084 ecb_binary16_to_float (uint16_t x)
1085 {
1086 int e = (x >> 10) & 0x1f;
1087 int m = x & 0x3ff;
1088 float r;
1089
1090 if (!e ) r = ldexpf (m , -24);
1091 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1092 else if (m ) r = ECB_NAN;
1093 else r = INFINITY;
1094
1095 return x & 0x8000 ? -r : r;
1096 }
1097
1098 /* convert a float to ieee single/binary32 */
1099 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1100 ecb_function_ uint32_t
1101 ecb_float_to_binary32 (float x)
1102 {
1103 uint32_t r;
1104
1105 #if ECB_STDFP
1106 memcpy (&r, &x, 4);
1107 #else
1108 /* slow emulation, works for anything but -0 */
1109 uint32_t m;
1110 int e;
1111
1112 if (x == 0e0f ) return 0x00000000U;
1113 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1114 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1115 if (x != x ) return 0x7fbfffffU;
1116
1117 m = frexpf (x, &e) * 0x1000000U;
1118
1119 r = m & 0x80000000U;
1120
1121 if (r)
1122 m = -m;
1123
1124 if (e <= -126)
1125 {
1126 m &= 0xffffffU;
1127 m >>= (-125 - e);
1128 e = -126;
1129 }
1130
1131 r |= (e + 126) << 23;
1132 r |= m & 0x7fffffU;
1133 #endif
1134
1135 return r;
1136 }
1137
1138 /* converts an ieee single/binary32 to a float */
1139 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1140 ecb_function_ float
1141 ecb_binary32_to_float (uint32_t x)
1142 {
1143 float r;
1144
1145 #if ECB_STDFP
1146 memcpy (&r, &x, 4);
1147 #else
1148 /* emulation, only works for normals and subnormals and +0 */
1149 int neg = x >> 31;
1150 int e = (x >> 23) & 0xffU;
1151
1152 x &= 0x7fffffU;
1153
1154 if (e)
1155 x |= 0x800000U;
1156 else
1157 e = 1;
1158
1159 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1160 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1161
1162 r = neg ? -r : r;
1163 #endif
1164
1165 return r;
1166 }
1167
1168 /* convert a double to ieee double/binary64 */
1169 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1170 ecb_function_ uint64_t
1171 ecb_double_to_binary64 (double x)
1172 {
1173 uint64_t r;
1174
1175 #if ECB_STDFP
1176 memcpy (&r, &x, 8);
1177 #else
1178 /* slow emulation, works for anything but -0 */
1179 uint64_t m;
1180 int e;
1181
1182 if (x == 0e0 ) return 0x0000000000000000U;
1183 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1184 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1185 if (x != x ) return 0X7ff7ffffffffffffU;
1186
1187 m = frexp (x, &e) * 0x20000000000000U;
1188
1189 r = m & 0x8000000000000000;;
1190
1191 if (r)
1192 m = -m;
1193
1194 if (e <= -1022)
1195 {
1196 m &= 0x1fffffffffffffU;
1197 m >>= (-1021 - e);
1198 e = -1022;
1199 }
1200
1201 r |= ((uint64_t)(e + 1022)) << 52;
1202 r |= m & 0xfffffffffffffU;
1203 #endif
1204
1205 return r;
1206 }
1207
1208 /* converts an ieee double/binary64 to a double */
1209 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1210 ecb_function_ double
1211 ecb_binary64_to_double (uint64_t x)
1212 {
1213 double r;
1214
1215 #if ECB_STDFP
1216 memcpy (&r, &x, 8);
1217 #else
1218 /* emulation, only works for normals and subnormals and +0 */
1219 int neg = x >> 63;
1220 int e = (x >> 52) & 0x7ffU;
1221
1222 x &= 0xfffffffffffffU;
1223
1224 if (e)
1225 x |= 0x10000000000000U;
1226 else
1227 e = 1;
1228
1229 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1230 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1231
1232 r = neg ? -r : r;
1233 #endif
1234
1235 return r;
1236 }
1237
1238#endif
1239
1240#endif
1241
1242/* ECB.H END */
1243
1244#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1245/* if your architecture doesn't need memory fences, e.g. because it is
1246 * single-cpu/core, or if you use libev in a project that doesn't use libev
1247 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1248 * libev, in which cases the memory fences become nops.
1249 * alternatively, you can remove this #error and link against libpthread,
1250 * which will then provide the memory fences.
1251 */
1252# error "memory fences not defined for your architecture, please report"
1253#endif
1254
1255#ifndef ECB_MEMORY_FENCE
1256# define ECB_MEMORY_FENCE do { } while (0)
1257# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1258# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1259#endif
566 1260
567#define expect_false(cond) ecb_expect_false (cond) 1261#define expect_false(cond) ecb_expect_false (cond)
568#define expect_true(cond) ecb_expect_true (cond) 1262#define expect_true(cond) ecb_expect_true (cond)
569#define noinline ecb_noinline 1263#define noinline ecb_noinline
570 1264
… …
716{ 1410{
717 write (STDERR_FILENO, msg, strlen (msg)); 1411 write (STDERR_FILENO, msg, strlen (msg));
718} 1412}
719#endif 1413#endif
720 1414
721static void (*syserr_cb)(const char *msg); 1415static void (*syserr_cb)(const char *msg) EV_THROW;
722 1416
723void ecb_cold 1417void ecb_cold
724ev_set_syserr_cb (void (*cb)(const char *msg)) 1418ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
725{ 1419{
726 syserr_cb = cb; 1420 syserr_cb = cb;
727} 1421}
728 1422
729static void noinline ecb_cold 1423static void noinline ecb_cold
… …
747 abort (); 1441 abort ();
748 } 1442 }
749} 1443}
750 1444
751static void * 1445static void *
752ev_realloc_emul (void *ptr, long size) 1446ev_realloc_emul (void *ptr, long size) EV_THROW
753{ 1447{
754#if __GLIBC__
755 return realloc (ptr, size);
756#else
757 /* some systems, notably openbsd and darwin, fail to properly 1448 /* some systems, notably openbsd and darwin, fail to properly
758 * implement realloc (x, 0) (as required by both ansi c-89 and 1449 * implement realloc (x, 0) (as required by both ansi c-89 and
759 * the single unix specification, so work around them here. 1450 * the single unix specification, so work around them here.
1451 * recently, also (at least) fedora and debian started breaking it,
1452 * despite documenting it otherwise.
760 */ 1453 */
761 1454
762 if (size) 1455 if (size)
763 return realloc (ptr, size); 1456 return realloc (ptr, size);
764 1457
765 free (ptr); 1458 free (ptr);
766 return 0; 1459 return 0;
767#endif
768} 1460}
769 1461
770static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1462static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
771 1463
772void ecb_cold 1464void ecb_cold
773ev_set_allocator (void *(*cb)(void *ptr, long size)) 1465ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
774{ 1466{
775 alloc = cb; 1467 alloc = cb;
776} 1468}
777 1469
778inline_speed void * 1470inline_speed void *
… …
866 #undef VAR 1558 #undef VAR
867 }; 1559 };
868 #include "ev_wrap.h" 1560 #include "ev_wrap.h"
869 1561
870 static struct ev_loop default_loop_struct; 1562 static struct ev_loop default_loop_struct;
871 struct ev_loop *ev_default_loop_ptr; 1563 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
872 1564
873#else 1565#else
874 1566
875 ev_tstamp ev_rt_now; 1567 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
876 #define VAR(name,decl) static decl; 1568 #define VAR(name,decl) static decl;
877 #include "ev_vars.h" 1569 #include "ev_vars.h"
878 #undef VAR 1570 #undef VAR
879 1571
880 static int ev_default_loop_ptr; 1572 static int ev_default_loop_ptr;
… …
895 1587
896/*****************************************************************************/ 1588/*****************************************************************************/
897 1589
898#ifndef EV_HAVE_EV_TIME 1590#ifndef EV_HAVE_EV_TIME
899ev_tstamp 1591ev_tstamp
900ev_time (void) 1592ev_time (void) EV_THROW
901{ 1593{
902#if EV_USE_REALTIME 1594#if EV_USE_REALTIME
903 if (expect_true (have_realtime)) 1595 if (expect_true (have_realtime))
904 { 1596 {
905 struct timespec ts; 1597 struct timespec ts;
… …
929 return ev_time (); 1621 return ev_time ();
930} 1622}
931 1623
932#if EV_MULTIPLICITY 1624#if EV_MULTIPLICITY
933ev_tstamp 1625ev_tstamp
934ev_now (EV_P) 1626ev_now (EV_P) EV_THROW
935{ 1627{
936 return ev_rt_now; 1628 return ev_rt_now;
937} 1629}
938#endif 1630#endif
939 1631
940void 1632void
941ev_sleep (ev_tstamp delay) 1633ev_sleep (ev_tstamp delay) EV_THROW
942{ 1634{
943 if (delay > 0.) 1635 if (delay > 0.)
944 { 1636 {
945#if EV_USE_NANOSLEEP 1637#if EV_USE_NANOSLEEP
946 struct timespec ts; 1638 struct timespec ts;
947 1639
948 EV_TS_SET (ts, delay); 1640 EV_TS_SET (ts, delay);
949 nanosleep (&ts, 0); 1641 nanosleep (&ts, 0);
950#elif defined(_WIN32) 1642#elif defined _WIN32
951 Sleep ((unsigned long)(delay * 1e3)); 1643 Sleep ((unsigned long)(delay * 1e3));
952#else 1644#else
953 struct timeval tv; 1645 struct timeval tv;
954 1646
955 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1647 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
974 1666
975 do 1667 do
976 ncur <<= 1; 1668 ncur <<= 1;
977 while (cnt > ncur); 1669 while (cnt > ncur);
978 1670
979 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1671 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
980 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1672 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
981 { 1673 {
982 ncur *= elem; 1674 ncur *= elem;
983 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1675 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
984 ncur = ncur - sizeof (void *) * 4; 1676 ncur = ncur - sizeof (void *) * 4;
… …
1027pendingcb (EV_P_ ev_prepare *w, int revents) 1719pendingcb (EV_P_ ev_prepare *w, int revents)
1028{ 1720{
1029} 1721}
1030 1722
1031void noinline 1723void noinline
1032ev_feed_event (EV_P_ void *w, int revents) 1724ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1033{ 1725{
1034 W w_ = (W)w; 1726 W w_ = (W)w;
1035 int pri = ABSPRI (w_); 1727 int pri = ABSPRI (w_);
1036 1728
1037 if (expect_false (w_->pending)) 1729 if (expect_false (w_->pending))
… …
1041 w_->pending = ++pendingcnt [pri]; 1733 w_->pending = ++pendingcnt [pri];
1042 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1734 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1043 pendings [pri][w_->pending - 1].w = w_; 1735 pendings [pri][w_->pending - 1].w = w_;
1044 pendings [pri][w_->pending - 1].events = revents; 1736 pendings [pri][w_->pending - 1].events = revents;
1045 } 1737 }
1738
1739 pendingpri = NUMPRI - 1;
1046} 1740}
1047 1741
1048inline_speed void 1742inline_speed void
1049feed_reverse (EV_P_ W w) 1743feed_reverse (EV_P_ W w)
1050{ 1744{
… …
1096 if (expect_true (!anfd->reify)) 1790 if (expect_true (!anfd->reify))
1097 fd_event_nocheck (EV_A_ fd, revents); 1791 fd_event_nocheck (EV_A_ fd, revents);
1098} 1792}
1099 1793
1100void 1794void
1101ev_feed_fd_event (EV_P_ int fd, int revents) 1795ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1102{ 1796{
1103 if (fd >= 0 && fd < anfdmax) 1797 if (fd >= 0 && fd < anfdmax)
1104 fd_event_nocheck (EV_A_ fd, revents); 1798 fd_event_nocheck (EV_A_ fd, revents);
1105} 1799}
1106 1800
… …
1425static void noinline ecb_cold 2119static void noinline ecb_cold
1426evpipe_init (EV_P) 2120evpipe_init (EV_P)
1427{ 2121{
1428 if (!ev_is_active (&pipe_w)) 2122 if (!ev_is_active (&pipe_w))
1429 { 2123 {
2124 int fds [2];
2125
1430# if EV_USE_EVENTFD 2126# if EV_USE_EVENTFD
2127 fds [0] = -1;
1431 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2128 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1432 if (evfd < 0 && errno == EINVAL) 2129 if (fds [1] < 0 && errno == EINVAL)
1433 evfd = eventfd (0, 0); 2130 fds [1] = eventfd (0, 0);
1434 2131
1435 if (evfd >= 0) 2132 if (fds [1] < 0)
2133# endif
1436 { 2134 {
2135 while (pipe (fds))
2136 ev_syserr ("(libev) error creating signal/async pipe");
2137
2138 fd_intern (fds [0]);
2139 }
2140
1437 evpipe [0] = -1; 2141 evpipe [0] = fds [0];
1438 fd_intern (evfd); /* doing it twice doesn't hurt */ 2142
1439 ev_io_set (&pipe_w, evfd, EV_READ); 2143 if (evpipe [1] < 0)
2144 evpipe [1] = fds [1]; /* first call, set write fd */
2145 else
2146 {
2147 /* on subsequent calls, do not change evpipe [1] */
2148 /* so that evpipe_write can always rely on its value. */
2149 /* this branch does not do anything sensible on windows, */
2150 /* so must not be executed on windows */
2151
2152 dup2 (fds [1], evpipe [1]);
2153 close (fds [1]);
2154 }
2155
2156 fd_intern (evpipe [1]);
2157
2158 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2159 ev_io_start (EV_A_ &pipe_w);
2160 ev_unref (EV_A); /* watcher should not keep loop alive */
2161 }
2162}
2163
2164inline_speed void
2165evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2166{
2167 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2168
2169 if (expect_true (*flag))
2170 return;
2171
2172 *flag = 1;
2173 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2174
2175 pipe_write_skipped = 1;
2176
2177 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2178
2179 if (pipe_write_wanted)
2180 {
2181 int old_errno;
2182
2183 pipe_write_skipped = 0;
2184 ECB_MEMORY_FENCE_RELEASE;
2185
2186 old_errno = errno; /* save errno because write will clobber it */
2187
2188#if EV_USE_EVENTFD
2189 if (evpipe [0] < 0)
2190 {
2191 uint64_t counter = 1;
2192 write (evpipe [1], &counter, sizeof (uint64_t));
1440 } 2193 }
1441 else 2194 else
1442# endif 2195#endif
1443 { 2196 {
1444 while (pipe (evpipe)) 2197#ifdef _WIN32
1445 ev_syserr ("(libev) error creating signal/async pipe"); 2198 WSABUF buf;
1446 2199 DWORD sent;
1447 fd_intern (evpipe [0]); 2200 buf.buf = &buf;
1448 fd_intern (evpipe [1]); 2201 buf.len = 1;
1449 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2202 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1450 } 2203#else
1451
1452 ev_io_start (EV_A_ &pipe_w);
1453 ev_unref (EV_A); /* watcher should not keep loop alive */
1454 }
1455}
1456
1457inline_speed void
1458evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1459{
1460 if (expect_true (*flag))
1461 /*return*//*D*/;
1462
1463 *flag = 1;
1464
1465 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1466
1467 pipe_write_skipped = 1;
1468
1469 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1470
1471 if (pipe_write_wanted)
1472 {
1473 int old_errno;
1474
1475 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1476
1477 old_errno = errno; /* save errno because write will clobber it */
1478
1479#if EV_USE_EVENTFD
1480 if (evfd >= 0)
1481 {
1482 uint64_t counter = 1;
1483 write (evfd, &counter, sizeof (uint64_t));
1484 }
1485 else
1486#endif
1487 {
1488 /* win32 people keep sending patches that change this write() to send() */
1489 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1490 /* so when you think this write should be a send instead, please find out */
1491 /* where your send() is from - it's definitely not the microsoft send, and */
1492 /* tell me. thank you. */
1493 write (evpipe [1], &(evpipe [1]), 1); 2204 write (evpipe [1], &(evpipe [1]), 1);
2205#endif
1494 } 2206 }
1495 2207
1496 errno = old_errno; 2208 errno = old_errno;
1497 } 2209 }
1498} 2210}
… …
1505 int i; 2217 int i;
1506 2218
1507 if (revents & EV_READ) 2219 if (revents & EV_READ)
1508 { 2220 {
1509#if EV_USE_EVENTFD 2221#if EV_USE_EVENTFD
1510 if (evfd >= 0) 2222 if (evpipe [0] < 0)
1511 { 2223 {
1512 uint64_t counter; 2224 uint64_t counter;
1513 read (evfd, &counter, sizeof (uint64_t)); 2225 read (evpipe [1], &counter, sizeof (uint64_t));
1514 } 2226 }
1515 else 2227 else
1516#endif 2228#endif
1517 { 2229 {
1518 char dummy; 2230 char dummy[4];
1519 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2231#ifdef _WIN32
2232 WSABUF buf;
2233 DWORD recvd;
2234 DWORD flags = 0;
2235 buf.buf = dummy;
2236 buf.len = sizeof (dummy);
2237 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2238#else
1520 read (evpipe [0], &dummy, 1); 2239 read (evpipe [0], &dummy, sizeof (dummy));
2240#endif
1521 } 2241 }
1522 } 2242 }
1523 2243
1524 pipe_write_skipped = 0; 2244 pipe_write_skipped = 0;
2245
2246 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1525 2247
1526#if EV_SIGNAL_ENABLE 2248#if EV_SIGNAL_ENABLE
1527 if (sig_pending) 2249 if (sig_pending)
1528 { 2250 {
1529 sig_pending = 0; 2251 sig_pending = 0;
2252
2253 ECB_MEMORY_FENCE;
1530 2254
1531 for (i = EV_NSIG - 1; i--; ) 2255 for (i = EV_NSIG - 1; i--; )
1532 if (expect_false (signals [i].pending)) 2256 if (expect_false (signals [i].pending))
1533 ev_feed_signal_event (EV_A_ i + 1); 2257 ev_feed_signal_event (EV_A_ i + 1);
1534 } 2258 }
… …
1536 2260
1537#if EV_ASYNC_ENABLE 2261#if EV_ASYNC_ENABLE
1538 if (async_pending) 2262 if (async_pending)
1539 { 2263 {
1540 async_pending = 0; 2264 async_pending = 0;
2265
2266 ECB_MEMORY_FENCE;
1541 2267
1542 for (i = asynccnt; i--; ) 2268 for (i = asynccnt; i--; )
1543 if (asyncs [i]->sent) 2269 if (asyncs [i]->sent)
1544 { 2270 {
1545 asyncs [i]->sent = 0; 2271 asyncs [i]->sent = 0;
2272 ECB_MEMORY_FENCE_RELEASE;
1546 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2273 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1547 } 2274 }
1548 } 2275 }
1549#endif 2276#endif
1550} 2277}
1551 2278
1552/*****************************************************************************/ 2279/*****************************************************************************/
1553 2280
1554void 2281void
1555ev_feed_signal (int signum) 2282ev_feed_signal (int signum) EV_THROW
1556{ 2283{
1557#if EV_MULTIPLICITY 2284#if EV_MULTIPLICITY
2285 EV_P;
2286 ECB_MEMORY_FENCE_ACQUIRE;
1558 EV_P = signals [signum - 1].loop; 2287 EV_A = signals [signum - 1].loop;
1559 2288
1560 if (!EV_A) 2289 if (!EV_A)
1561 return; 2290 return;
1562#endif 2291#endif
1563 2292
1564 if (!ev_active (&pipe_w))
1565 return;
1566
1567 signals [signum - 1].pending = 1; 2293 signals [signum - 1].pending = 1;
1568 evpipe_write (EV_A_ &sig_pending); 2294 evpipe_write (EV_A_ &sig_pending);
1569} 2295}
1570 2296
1571static void 2297static void
… …
1577 2303
1578 ev_feed_signal (signum); 2304 ev_feed_signal (signum);
1579} 2305}
1580 2306
1581void noinline 2307void noinline
1582ev_feed_signal_event (EV_P_ int signum) 2308ev_feed_signal_event (EV_P_ int signum) EV_THROW
1583{ 2309{
1584 WL w; 2310 WL w;
1585 2311
1586 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2312 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1587 return; 2313 return;
1588 2314
1589 --signum; 2315 --signum;
1590 2316
1591#if EV_MULTIPLICITY 2317#if EV_MULTIPLICITY
… …
1595 if (expect_false (signals [signum].loop != EV_A)) 2321 if (expect_false (signals [signum].loop != EV_A))
1596 return; 2322 return;
1597#endif 2323#endif
1598 2324
1599 signals [signum].pending = 0; 2325 signals [signum].pending = 0;
2326 ECB_MEMORY_FENCE_RELEASE;
1600 2327
1601 for (w = signals [signum].head; w; w = w->next) 2328 for (w = signals [signum].head; w; w = w->next)
1602 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2329 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1603} 2330}
1604 2331
… …
1703#if EV_USE_SELECT 2430#if EV_USE_SELECT
1704# include "ev_select.c" 2431# include "ev_select.c"
1705#endif 2432#endif
1706 2433
1707int ecb_cold 2434int ecb_cold
1708ev_version_major (void) 2435ev_version_major (void) EV_THROW
1709{ 2436{
1710 return EV_VERSION_MAJOR; 2437 return EV_VERSION_MAJOR;
1711} 2438}
1712 2439
1713int ecb_cold 2440int ecb_cold
1714ev_version_minor (void) 2441ev_version_minor (void) EV_THROW
1715{ 2442{
1716 return EV_VERSION_MINOR; 2443 return EV_VERSION_MINOR;
1717} 2444}
1718 2445
1719/* return true if we are running with elevated privileges and should ignore env variables */ 2446/* return true if we are running with elevated privileges and should ignore env variables */
… …
1727 || getgid () != getegid (); 2454 || getgid () != getegid ();
1728#endif 2455#endif
1729} 2456}
1730 2457
1731unsigned int ecb_cold 2458unsigned int ecb_cold
1732ev_supported_backends (void) 2459ev_supported_backends (void) EV_THROW
1733{ 2460{
1734 unsigned int flags = 0; 2461 unsigned int flags = 0;
1735 2462
1736 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2463 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1737 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2464 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1741 2468
1742 return flags; 2469 return flags;
1743} 2470}
1744 2471
1745unsigned int ecb_cold 2472unsigned int ecb_cold
1746ev_recommended_backends (void) 2473ev_recommended_backends (void) EV_THROW
1747{ 2474{
1748 unsigned int flags = ev_supported_backends (); 2475 unsigned int flags = ev_supported_backends ();
1749 2476
1750#ifndef __NetBSD__ 2477#ifndef __NetBSD__
1751 /* kqueue is borked on everything but netbsd apparently */ 2478 /* kqueue is borked on everything but netbsd apparently */
… …
1763 2490
1764 return flags; 2491 return flags;
1765} 2492}
1766 2493
1767unsigned int ecb_cold 2494unsigned int ecb_cold
1768ev_embeddable_backends (void) 2495ev_embeddable_backends (void) EV_THROW
1769{ 2496{
1770 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2497 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1771 2498
1772 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2499 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1773 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2500 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1775 2502
1776 return flags; 2503 return flags;
1777} 2504}
1778 2505
1779unsigned int 2506unsigned int
1780ev_backend (EV_P) 2507ev_backend (EV_P) EV_THROW
1781{ 2508{
1782 return backend; 2509 return backend;
1783} 2510}
1784 2511
1785#if EV_FEATURE_API 2512#if EV_FEATURE_API
1786unsigned int 2513unsigned int
1787ev_iteration (EV_P) 2514ev_iteration (EV_P) EV_THROW
1788{ 2515{
1789 return loop_count; 2516 return loop_count;
1790} 2517}
1791 2518
1792unsigned int 2519unsigned int
1793ev_depth (EV_P) 2520ev_depth (EV_P) EV_THROW
1794{ 2521{
1795 return loop_depth; 2522 return loop_depth;
1796} 2523}
1797 2524
1798void 2525void
1799ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2526ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1800{ 2527{
1801 io_blocktime = interval; 2528 io_blocktime = interval;
1802} 2529}
1803 2530
1804void 2531void
1805ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2532ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1806{ 2533{
1807 timeout_blocktime = interval; 2534 timeout_blocktime = interval;
1808} 2535}
1809 2536
1810void 2537void
1811ev_set_userdata (EV_P_ void *data) 2538ev_set_userdata (EV_P_ void *data) EV_THROW
1812{ 2539{
1813 userdata = data; 2540 userdata = data;
1814} 2541}
1815 2542
1816void * 2543void *
1817ev_userdata (EV_P) 2544ev_userdata (EV_P) EV_THROW
1818{ 2545{
1819 return userdata; 2546 return userdata;
1820} 2547}
1821 2548
1822void 2549void
1823ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2550ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
1824{ 2551{
1825 invoke_cb = invoke_pending_cb; 2552 invoke_cb = invoke_pending_cb;
1826} 2553}
1827 2554
1828void 2555void
1829ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2556ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
1830{ 2557{
1831 release_cb = release; 2558 release_cb = release;
1832 acquire_cb = acquire; 2559 acquire_cb = acquire;
1833} 2560}
1834#endif 2561#endif
1835 2562
1836/* initialise a loop structure, must be zero-initialised */ 2563/* initialise a loop structure, must be zero-initialised */
1837static void noinline ecb_cold 2564static void noinline ecb_cold
1838loop_init (EV_P_ unsigned int flags) 2565loop_init (EV_P_ unsigned int flags) EV_THROW
1839{ 2566{
1840 if (!backend) 2567 if (!backend)
1841 { 2568 {
1842 origflags = flags; 2569 origflags = flags;
1843 2570
… …
1888#if EV_ASYNC_ENABLE 2615#if EV_ASYNC_ENABLE
1889 async_pending = 0; 2616 async_pending = 0;
1890#endif 2617#endif
1891 pipe_write_skipped = 0; 2618 pipe_write_skipped = 0;
1892 pipe_write_wanted = 0; 2619 pipe_write_wanted = 0;
2620 evpipe [0] = -1;
2621 evpipe [1] = -1;
1893#if EV_USE_INOTIFY 2622#if EV_USE_INOTIFY
1894 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2623 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1895#endif 2624#endif
1896#if EV_USE_SIGNALFD 2625#if EV_USE_SIGNALFD
1897 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2626 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
… …
1948 EV_INVOKE_PENDING; 2677 EV_INVOKE_PENDING;
1949 } 2678 }
1950#endif 2679#endif
1951 2680
1952#if EV_CHILD_ENABLE 2681#if EV_CHILD_ENABLE
1953 if (ev_is_active (&childev)) 2682 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1954 { 2683 {
1955 ev_ref (EV_A); /* child watcher */ 2684 ev_ref (EV_A); /* child watcher */
1956 ev_signal_stop (EV_A_ &childev); 2685 ev_signal_stop (EV_A_ &childev);
1957 } 2686 }
1958#endif 2687#endif
… …
1960 if (ev_is_active (&pipe_w)) 2689 if (ev_is_active (&pipe_w))
1961 { 2690 {
1962 /*ev_ref (EV_A);*/ 2691 /*ev_ref (EV_A);*/
1963 /*ev_io_stop (EV_A_ &pipe_w);*/ 2692 /*ev_io_stop (EV_A_ &pipe_w);*/
1964 2693
1965#if EV_USE_EVENTFD
1966 if (evfd >= 0)
1967 close (evfd);
1968#endif
1969
1970 if (evpipe [0] >= 0)
1971 {
1972 EV_WIN32_CLOSE_FD (evpipe [0]); 2694 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1973 EV_WIN32_CLOSE_FD (evpipe [1]); 2695 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1974 }
1975 } 2696 }
1976 2697
1977#if EV_USE_SIGNALFD 2698#if EV_USE_SIGNALFD
1978 if (ev_is_active (&sigfd_w)) 2699 if (ev_is_active (&sigfd_w))
1979 close (sigfd); 2700 close (sigfd);
… …
2065#endif 2786#endif
2066#if EV_USE_INOTIFY 2787#if EV_USE_INOTIFY
2067 infy_fork (EV_A); 2788 infy_fork (EV_A);
2068#endif 2789#endif
2069 2790
2791#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2070 if (ev_is_active (&pipe_w)) 2792 if (ev_is_active (&pipe_w))
2071 { 2793 {
2072 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 2794 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2073 2795
2074 ev_ref (EV_A); 2796 ev_ref (EV_A);
2075 ev_io_stop (EV_A_ &pipe_w); 2797 ev_io_stop (EV_A_ &pipe_w);
2076 2798
2077#if EV_USE_EVENTFD
2078 if (evfd >= 0)
2079 close (evfd);
2080#endif
2081
2082 if (evpipe [0] >= 0) 2799 if (evpipe [0] >= 0)
2083 {
2084 EV_WIN32_CLOSE_FD (evpipe [0]); 2800 EV_WIN32_CLOSE_FD (evpipe [0]);
2085 EV_WIN32_CLOSE_FD (evpipe [1]);
2086 }
2087 2801
2088#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2089 evpipe_init (EV_A); 2802 evpipe_init (EV_A);
2090 /* now iterate over everything, in case we missed something */ 2803 /* iterate over everything, in case we missed something before */
2091 pipecb (EV_A_ &pipe_w, EV_READ); 2804 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2092#endif
2093 } 2805 }
2806#endif
2094 2807
2095 postfork = 0; 2808 postfork = 0;
2096} 2809}
2097 2810
2098#if EV_MULTIPLICITY 2811#if EV_MULTIPLICITY
2099 2812
2100struct ev_loop * ecb_cold 2813struct ev_loop * ecb_cold
2101ev_loop_new (unsigned int flags) 2814ev_loop_new (unsigned int flags) EV_THROW
2102{ 2815{
2103 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2816 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2104 2817
2105 memset (EV_A, 0, sizeof (struct ev_loop)); 2818 memset (EV_A, 0, sizeof (struct ev_loop));
2106 loop_init (EV_A_ flags); 2819 loop_init (EV_A_ flags);
… …
2150} 2863}
2151#endif 2864#endif
2152 2865
2153#if EV_FEATURE_API 2866#if EV_FEATURE_API
2154void ecb_cold 2867void ecb_cold
2155ev_verify (EV_P) 2868ev_verify (EV_P) EV_THROW
2156{ 2869{
2157#if EV_VERIFY 2870#if EV_VERIFY
2158 int i; 2871 int i;
2159 WL w; 2872 WL w, w2;
2160 2873
2161 assert (activecnt >= -1); 2874 assert (activecnt >= -1);
2162 2875
2163 assert (fdchangemax >= fdchangecnt); 2876 assert (fdchangemax >= fdchangecnt);
2164 for (i = 0; i < fdchangecnt; ++i) 2877 for (i = 0; i < fdchangecnt; ++i)
2165 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2878 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2166 2879
2167 assert (anfdmax >= 0); 2880 assert (anfdmax >= 0);
2168 for (i = 0; i < anfdmax; ++i) 2881 for (i = 0; i < anfdmax; ++i)
2882 {
2883 int j = 0;
2884
2169 for (w = anfds [i].head; w; w = w->next) 2885 for (w = w2 = anfds [i].head; w; w = w->next)
2170 { 2886 {
2171 verify_watcher (EV_A_ (W)w); 2887 verify_watcher (EV_A_ (W)w);
2888
2889 if (j++ & 1)
2890 {
2891 assert (("libev: io watcher list contains a loop", w != w2));
2892 w2 = w2->next;
2893 }
2894
2172 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2895 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2173 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2896 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2174 } 2897 }
2898 }
2175 2899
2176 assert (timermax >= timercnt); 2900 assert (timermax >= timercnt);
2177 verify_heap (EV_A_ timers, timercnt); 2901 verify_heap (EV_A_ timers, timercnt);
2178 2902
2179#if EV_PERIODIC_ENABLE 2903#if EV_PERIODIC_ENABLE
… …
2229#if EV_MULTIPLICITY 2953#if EV_MULTIPLICITY
2230struct ev_loop * ecb_cold 2954struct ev_loop * ecb_cold
2231#else 2955#else
2232int 2956int
2233#endif 2957#endif
2234ev_default_loop (unsigned int flags) 2958ev_default_loop (unsigned int flags) EV_THROW
2235{ 2959{
2236 if (!ev_default_loop_ptr) 2960 if (!ev_default_loop_ptr)
2237 { 2961 {
2238#if EV_MULTIPLICITY 2962#if EV_MULTIPLICITY
2239 EV_P = ev_default_loop_ptr = &default_loop_struct; 2963 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2258 2982
2259 return ev_default_loop_ptr; 2983 return ev_default_loop_ptr;
2260} 2984}
2261 2985
2262void 2986void
2263ev_loop_fork (EV_P) 2987ev_loop_fork (EV_P) EV_THROW
2264{ 2988{
2265 postfork = 1; /* must be in line with ev_default_fork */ 2989 postfork = 1;
2266} 2990}
2267 2991
2268/*****************************************************************************/ 2992/*****************************************************************************/
2269 2993
2270void 2994void
… …
2272{ 2996{
2273 EV_CB_INVOKE ((W)w, revents); 2997 EV_CB_INVOKE ((W)w, revents);
2274} 2998}
2275 2999
2276unsigned int 3000unsigned int
2277ev_pending_count (EV_P) 3001ev_pending_count (EV_P) EV_THROW
2278{ 3002{
2279 int pri; 3003 int pri;
2280 unsigned int count = 0; 3004 unsigned int count = 0;
2281 3005
2282 for (pri = NUMPRI; pri--; ) 3006 for (pri = NUMPRI; pri--; )
… …
2286} 3010}
2287 3011
2288void noinline 3012void noinline
2289ev_invoke_pending (EV_P) 3013ev_invoke_pending (EV_P)
2290{ 3014{
2291 int pri; 3015 pendingpri = NUMPRI;
2292 3016
2293 for (pri = NUMPRI; pri--; ) 3017 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3018 {
3019 --pendingpri;
3020
2294 while (pendingcnt [pri]) 3021 while (pendingcnt [pendingpri])
2295 { 3022 {
2296 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3023 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2297 3024
2298 p->w->pending = 0; 3025 p->w->pending = 0;
2299 EV_CB_INVOKE (p->w, p->events); 3026 EV_CB_INVOKE (p->w, p->events);
2300 EV_FREQUENT_CHECK; 3027 EV_FREQUENT_CHECK;
2301 } 3028 }
3029 }
2302} 3030}
2303 3031
2304#if EV_IDLE_ENABLE 3032#if EV_IDLE_ENABLE
2305/* make idle watchers pending. this handles the "call-idle */ 3033/* make idle watchers pending. this handles the "call-idle */
2306/* only when higher priorities are idle" logic */ 3034/* only when higher priorities are idle" logic */
… …
2396{ 3124{
2397 EV_FREQUENT_CHECK; 3125 EV_FREQUENT_CHECK;
2398 3126
2399 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3127 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2400 { 3128 {
2401 int feed_count = 0;
2402
2403 do 3129 do
2404 { 3130 {
2405 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2406 3132
2407 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2541 3267
2542 mn_now = ev_rt_now; 3268 mn_now = ev_rt_now;
2543 } 3269 }
2544} 3270}
2545 3271
2546void 3272int
2547ev_run (EV_P_ int flags) 3273ev_run (EV_P_ int flags)
2548{ 3274{
2549#if EV_FEATURE_API 3275#if EV_FEATURE_API
2550 ++loop_depth; 3276 ++loop_depth;
2551#endif 3277#endif
… …
2612 time_update (EV_A_ 1e100); 3338 time_update (EV_A_ 1e100);
2613 3339
2614 /* from now on, we want a pipe-wake-up */ 3340 /* from now on, we want a pipe-wake-up */
2615 pipe_write_wanted = 1; 3341 pipe_write_wanted = 1;
2616 3342
2617 ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */ 3343 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2618 3344
2619 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) 3345 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2620 { 3346 {
2621 waittime = MAX_BLOCKTIME; 3347 waittime = MAX_BLOCKTIME;
2622 3348
… …
2664#endif 3390#endif
2665 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2666 backend_poll (EV_A_ waittime); 3392 backend_poll (EV_A_ waittime);
2667 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2668 3394
2669 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */ 3395 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2670 3396
3397 ECB_MEMORY_FENCE_ACQUIRE;
2671 if (pipe_write_skipped) 3398 if (pipe_write_skipped)
2672 { 3399 {
2673 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); 3400 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2674 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3401 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2675 } 3402 }
… …
2708 loop_done = EVBREAK_CANCEL; 3435 loop_done = EVBREAK_CANCEL;
2709 3436
2710#if EV_FEATURE_API 3437#if EV_FEATURE_API
2711 --loop_depth; 3438 --loop_depth;
2712#endif 3439#endif
3440
3441 return activecnt;
2713} 3442}
2714 3443
2715void 3444void
2716ev_break (EV_P_ int how) 3445ev_break (EV_P_ int how) EV_THROW
2717{ 3446{
2718 loop_done = how; 3447 loop_done = how;
2719} 3448}
2720 3449
2721void 3450void
2722ev_ref (EV_P) 3451ev_ref (EV_P) EV_THROW
2723{ 3452{
2724 ++activecnt; 3453 ++activecnt;
2725} 3454}
2726 3455
2727void 3456void
2728ev_unref (EV_P) 3457ev_unref (EV_P) EV_THROW
2729{ 3458{
2730 --activecnt; 3459 --activecnt;
2731} 3460}
2732 3461
2733void 3462void
2734ev_now_update (EV_P) 3463ev_now_update (EV_P) EV_THROW
2735{ 3464{
2736 time_update (EV_A_ 1e100); 3465 time_update (EV_A_ 1e100);
2737} 3466}
2738 3467
2739void 3468void
2740ev_suspend (EV_P) 3469ev_suspend (EV_P) EV_THROW
2741{ 3470{
2742 ev_now_update (EV_A); 3471 ev_now_update (EV_A);
2743} 3472}
2744 3473
2745void 3474void
2746ev_resume (EV_P) 3475ev_resume (EV_P) EV_THROW
2747{ 3476{
2748 ev_tstamp mn_prev = mn_now; 3477 ev_tstamp mn_prev = mn_now;
2749 3478
2750 ev_now_update (EV_A); 3479 ev_now_update (EV_A);
2751 timers_reschedule (EV_A_ mn_now - mn_prev); 3480 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2790 w->pending = 0; 3519 w->pending = 0;
2791 } 3520 }
2792} 3521}
2793 3522
2794int 3523int
2795ev_clear_pending (EV_P_ void *w) 3524ev_clear_pending (EV_P_ void *w) EV_THROW
2796{ 3525{
2797 W w_ = (W)w; 3526 W w_ = (W)w;
2798 int pending = w_->pending; 3527 int pending = w_->pending;
2799 3528
2800 if (expect_true (pending)) 3529 if (expect_true (pending))
… …
2833} 3562}
2834 3563
2835/*****************************************************************************/ 3564/*****************************************************************************/
2836 3565
2837void noinline 3566void noinline
2838ev_io_start (EV_P_ ev_io *w) 3567ev_io_start (EV_P_ ev_io *w) EV_THROW
2839{ 3568{
2840 int fd = w->fd; 3569 int fd = w->fd;
2841 3570
2842 if (expect_false (ev_is_active (w))) 3571 if (expect_false (ev_is_active (w)))
2843 return; 3572 return;
… …
2849 3578
2850 ev_start (EV_A_ (W)w, 1); 3579 ev_start (EV_A_ (W)w, 1);
2851 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3580 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2852 wlist_add (&anfds[fd].head, (WL)w); 3581 wlist_add (&anfds[fd].head, (WL)w);
2853 3582
3583 /* common bug, apparently */
3584 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3585
2854 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3586 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2855 w->events &= ~EV__IOFDSET; 3587 w->events &= ~EV__IOFDSET;
2856 3588
2857 EV_FREQUENT_CHECK; 3589 EV_FREQUENT_CHECK;
2858} 3590}
2859 3591
2860void noinline 3592void noinline
2861ev_io_stop (EV_P_ ev_io *w) 3593ev_io_stop (EV_P_ ev_io *w) EV_THROW
2862{ 3594{
2863 clear_pending (EV_A_ (W)w); 3595 clear_pending (EV_A_ (W)w);
2864 if (expect_false (!ev_is_active (w))) 3596 if (expect_false (!ev_is_active (w)))
2865 return; 3597 return;
2866 3598
… …
2875 3607
2876 EV_FREQUENT_CHECK; 3608 EV_FREQUENT_CHECK;
2877} 3609}
2878 3610
2879void noinline 3611void noinline
2880ev_timer_start (EV_P_ ev_timer *w) 3612ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2881{ 3613{
2882 if (expect_false (ev_is_active (w))) 3614 if (expect_false (ev_is_active (w)))
2883 return; 3615 return;
2884 3616
2885 ev_at (w) += mn_now; 3617 ev_at (w) += mn_now;
… …
2899 3631
2900 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3632 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2901} 3633}
2902 3634
2903void noinline 3635void noinline
2904ev_timer_stop (EV_P_ ev_timer *w) 3636ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2905{ 3637{
2906 clear_pending (EV_A_ (W)w); 3638 clear_pending (EV_A_ (W)w);
2907 if (expect_false (!ev_is_active (w))) 3639 if (expect_false (!ev_is_active (w)))
2908 return; 3640 return;
2909 3641
… …
2929 3661
2930 EV_FREQUENT_CHECK; 3662 EV_FREQUENT_CHECK;
2931} 3663}
2932 3664
2933void noinline 3665void noinline
2934ev_timer_again (EV_P_ ev_timer *w) 3666ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2935{ 3667{
2936 EV_FREQUENT_CHECK; 3668 EV_FREQUENT_CHECK;
3669
3670 clear_pending (EV_A_ (W)w);
2937 3671
2938 if (ev_is_active (w)) 3672 if (ev_is_active (w))
2939 { 3673 {
2940 if (w->repeat) 3674 if (w->repeat)
2941 { 3675 {
… …
2954 3688
2955 EV_FREQUENT_CHECK; 3689 EV_FREQUENT_CHECK;
2956} 3690}
2957 3691
2958ev_tstamp 3692ev_tstamp
2959ev_timer_remaining (EV_P_ ev_timer *w) 3693ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2960{ 3694{
2961 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3695 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2962} 3696}
2963 3697
2964#if EV_PERIODIC_ENABLE 3698#if EV_PERIODIC_ENABLE
2965void noinline 3699void noinline
2966ev_periodic_start (EV_P_ ev_periodic *w) 3700ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2967{ 3701{
2968 if (expect_false (ev_is_active (w))) 3702 if (expect_false (ev_is_active (w)))
2969 return; 3703 return;
2970 3704
2971 if (w->reschedule_cb) 3705 if (w->reschedule_cb)
… …
2991 3725
2992 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3726 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2993} 3727}
2994 3728
2995void noinline 3729void noinline
2996ev_periodic_stop (EV_P_ ev_periodic *w) 3730ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2997{ 3731{
2998 clear_pending (EV_A_ (W)w); 3732 clear_pending (EV_A_ (W)w);
2999 if (expect_false (!ev_is_active (w))) 3733 if (expect_false (!ev_is_active (w)))
3000 return; 3734 return;
3001 3735
… …
3019 3753
3020 EV_FREQUENT_CHECK; 3754 EV_FREQUENT_CHECK;
3021} 3755}
3022 3756
3023void noinline 3757void noinline
3024ev_periodic_again (EV_P_ ev_periodic *w) 3758ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3025{ 3759{
3026 /* TODO: use adjustheap and recalculation */ 3760 /* TODO: use adjustheap and recalculation */
3027 ev_periodic_stop (EV_A_ w); 3761 ev_periodic_stop (EV_A_ w);
3028 ev_periodic_start (EV_A_ w); 3762 ev_periodic_start (EV_A_ w);
3029} 3763}
… …
3034#endif 3768#endif
3035 3769
3036#if EV_SIGNAL_ENABLE 3770#if EV_SIGNAL_ENABLE
3037 3771
3038void noinline 3772void noinline
3039ev_signal_start (EV_P_ ev_signal *w) 3773ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3040{ 3774{
3041 if (expect_false (ev_is_active (w))) 3775 if (expect_false (ev_is_active (w)))
3042 return; 3776 return;
3043 3777
3044 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3778 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
3046#if EV_MULTIPLICITY 3780#if EV_MULTIPLICITY
3047 assert (("libev: a signal must not be attached to two different loops", 3781 assert (("libev: a signal must not be attached to two different loops",
3048 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3782 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3049 3783
3050 signals [w->signum - 1].loop = EV_A; 3784 signals [w->signum - 1].loop = EV_A;
3785 ECB_MEMORY_FENCE_RELEASE;
3051#endif 3786#endif
3052 3787
3053 EV_FREQUENT_CHECK; 3788 EV_FREQUENT_CHECK;
3054 3789
3055#if EV_USE_SIGNALFD 3790#if EV_USE_SIGNALFD
… …
3115 3850
3116 EV_FREQUENT_CHECK; 3851 EV_FREQUENT_CHECK;
3117} 3852}
3118 3853
3119void noinline 3854void noinline
3120ev_signal_stop (EV_P_ ev_signal *w) 3855ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3121{ 3856{
3122 clear_pending (EV_A_ (W)w); 3857 clear_pending (EV_A_ (W)w);
3123 if (expect_false (!ev_is_active (w))) 3858 if (expect_false (!ev_is_active (w)))
3124 return; 3859 return;
3125 3860
… …
3156#endif 3891#endif
3157 3892
3158#if EV_CHILD_ENABLE 3893#if EV_CHILD_ENABLE
3159 3894
3160void 3895void
3161ev_child_start (EV_P_ ev_child *w) 3896ev_child_start (EV_P_ ev_child *w) EV_THROW
3162{ 3897{
3163#if EV_MULTIPLICITY 3898#if EV_MULTIPLICITY
3164 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3899 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3165#endif 3900#endif
3166 if (expect_false (ev_is_active (w))) 3901 if (expect_false (ev_is_active (w)))
… …
3173 3908
3174 EV_FREQUENT_CHECK; 3909 EV_FREQUENT_CHECK;
3175} 3910}
3176 3911
3177void 3912void
3178ev_child_stop (EV_P_ ev_child *w) 3913ev_child_stop (EV_P_ ev_child *w) EV_THROW
3179{ 3914{
3180 clear_pending (EV_A_ (W)w); 3915 clear_pending (EV_A_ (W)w);
3181 if (expect_false (!ev_is_active (w))) 3916 if (expect_false (!ev_is_active (w)))
3182 return; 3917 return;
3183 3918
… …
3210# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3945# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3211 3946
3212static void noinline 3947static void noinline
3213infy_add (EV_P_ ev_stat *w) 3948infy_add (EV_P_ ev_stat *w)
3214{ 3949{
3215 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); 3950 w->wd = inotify_add_watch (fs_fd, w->path,
3951 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3952 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3953 | IN_DONT_FOLLOW | IN_MASK_ADD);
3216 3954
3217 if (w->wd >= 0) 3955 if (w->wd >= 0)
3218 { 3956 {
3219 struct statfs sfs; 3957 struct statfs sfs;
3220 3958
… …
3224 3962
3225 if (!fs_2625) 3963 if (!fs_2625)
3226 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3964 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3227 else if (!statfs (w->path, &sfs) 3965 else if (!statfs (w->path, &sfs)
3228 && (sfs.f_type == 0x1373 /* devfs */ 3966 && (sfs.f_type == 0x1373 /* devfs */
3967 || sfs.f_type == 0x4006 /* fat */
3968 || sfs.f_type == 0x4d44 /* msdos */
3229 || sfs.f_type == 0xEF53 /* ext2/3 */ 3969 || sfs.f_type == 0xEF53 /* ext2/3 */
3970 || sfs.f_type == 0x72b6 /* jffs2 */
3971 || sfs.f_type == 0x858458f6 /* ramfs */
3972 || sfs.f_type == 0x5346544e /* ntfs */
3230 || sfs.f_type == 0x3153464a /* jfs */ 3973 || sfs.f_type == 0x3153464a /* jfs */
3974 || sfs.f_type == 0x9123683e /* btrfs */
3231 || sfs.f_type == 0x52654973 /* reiser3 */ 3975 || sfs.f_type == 0x52654973 /* reiser3 */
3232 || sfs.f_type == 0x01021994 /* tempfs */ 3976 || sfs.f_type == 0x01021994 /* tmpfs */
3233 || sfs.f_type == 0x58465342 /* xfs */)) 3977 || sfs.f_type == 0x58465342 /* xfs */))
3234 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3978 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3235 else 3979 else
3236 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3980 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3237 } 3981 }
… …
3350} 4094}
3351 4095
3352inline_size int 4096inline_size int
3353infy_newfd (void) 4097infy_newfd (void)
3354{ 4098{
3355#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4099#if defined IN_CLOEXEC && defined IN_NONBLOCK
3356 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4100 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3357 if (fd >= 0) 4101 if (fd >= 0)
3358 return fd; 4102 return fd;
3359#endif 4103#endif
3360 return inotify_init (); 4104 return inotify_init ();
… …
3435#else 4179#else
3436# define EV_LSTAT(p,b) lstat (p, b) 4180# define EV_LSTAT(p,b) lstat (p, b)
3437#endif 4181#endif
3438 4182
3439void 4183void
3440ev_stat_stat (EV_P_ ev_stat *w) 4184ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3441{ 4185{
3442 if (lstat (w->path, &w->attr) < 0) 4186 if (lstat (w->path, &w->attr) < 0)
3443 w->attr.st_nlink = 0; 4187 w->attr.st_nlink = 0;
3444 else if (!w->attr.st_nlink) 4188 else if (!w->attr.st_nlink)
3445 w->attr.st_nlink = 1; 4189 w->attr.st_nlink = 1;
… …
3484 ev_feed_event (EV_A_ w, EV_STAT); 4228 ev_feed_event (EV_A_ w, EV_STAT);
3485 } 4229 }
3486} 4230}
3487 4231
3488void 4232void
3489ev_stat_start (EV_P_ ev_stat *w) 4233ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3490{ 4234{
3491 if (expect_false (ev_is_active (w))) 4235 if (expect_false (ev_is_active (w)))
3492 return; 4236 return;
3493 4237
3494 ev_stat_stat (EV_A_ w); 4238 ev_stat_stat (EV_A_ w);
… …
3515 4259
3516 EV_FREQUENT_CHECK; 4260 EV_FREQUENT_CHECK;
3517} 4261}
3518 4262
3519void 4263void
3520ev_stat_stop (EV_P_ ev_stat *w) 4264ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3521{ 4265{
3522 clear_pending (EV_A_ (W)w); 4266 clear_pending (EV_A_ (W)w);
3523 if (expect_false (!ev_is_active (w))) 4267 if (expect_false (!ev_is_active (w)))
3524 return; 4268 return;
3525 4269
… …
3541} 4285}
3542#endif 4286#endif
3543 4287
3544#if EV_IDLE_ENABLE 4288#if EV_IDLE_ENABLE
3545void 4289void
3546ev_idle_start (EV_P_ ev_idle *w) 4290ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3547{ 4291{
3548 if (expect_false (ev_is_active (w))) 4292 if (expect_false (ev_is_active (w)))
3549 return; 4293 return;
3550 4294
3551 pri_adjust (EV_A_ (W)w); 4295 pri_adjust (EV_A_ (W)w);
… …
3564 4308
3565 EV_FREQUENT_CHECK; 4309 EV_FREQUENT_CHECK;
3566} 4310}
3567 4311
3568void 4312void
3569ev_idle_stop (EV_P_ ev_idle *w) 4313ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3570{ 4314{
3571 clear_pending (EV_A_ (W)w); 4315 clear_pending (EV_A_ (W)w);
3572 if (expect_false (!ev_is_active (w))) 4316 if (expect_false (!ev_is_active (w)))
3573 return; 4317 return;
3574 4318
… …
3588} 4332}
3589#endif 4333#endif
3590 4334
3591#if EV_PREPARE_ENABLE 4335#if EV_PREPARE_ENABLE
3592void 4336void
3593ev_prepare_start (EV_P_ ev_prepare *w) 4337ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3594{ 4338{
3595 if (expect_false (ev_is_active (w))) 4339 if (expect_false (ev_is_active (w)))
3596 return; 4340 return;
3597 4341
3598 EV_FREQUENT_CHECK; 4342 EV_FREQUENT_CHECK;
… …
3603 4347
3604 EV_FREQUENT_CHECK; 4348 EV_FREQUENT_CHECK;
3605} 4349}
3606 4350
3607void 4351void
3608ev_prepare_stop (EV_P_ ev_prepare *w) 4352ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3609{ 4353{
3610 clear_pending (EV_A_ (W)w); 4354 clear_pending (EV_A_ (W)w);
3611 if (expect_false (!ev_is_active (w))) 4355 if (expect_false (!ev_is_active (w)))
3612 return; 4356 return;
3613 4357
… …
3626} 4370}
3627#endif 4371#endif
3628 4372
3629#if EV_CHECK_ENABLE 4373#if EV_CHECK_ENABLE
3630void 4374void
3631ev_check_start (EV_P_ ev_check *w) 4375ev_check_start (EV_P_ ev_check *w) EV_THROW
3632{ 4376{
3633 if (expect_false (ev_is_active (w))) 4377 if (expect_false (ev_is_active (w)))
3634 return; 4378 return;
3635 4379
3636 EV_FREQUENT_CHECK; 4380 EV_FREQUENT_CHECK;
… …
3641 4385
3642 EV_FREQUENT_CHECK; 4386 EV_FREQUENT_CHECK;
3643} 4387}
3644 4388
3645void 4389void
3646ev_check_stop (EV_P_ ev_check *w) 4390ev_check_stop (EV_P_ ev_check *w) EV_THROW
3647{ 4391{
3648 clear_pending (EV_A_ (W)w); 4392 clear_pending (EV_A_ (W)w);
3649 if (expect_false (!ev_is_active (w))) 4393 if (expect_false (!ev_is_active (w)))
3650 return; 4394 return;
3651 4395
… …
3664} 4408}
3665#endif 4409#endif
3666 4410
3667#if EV_EMBED_ENABLE 4411#if EV_EMBED_ENABLE
3668void noinline 4412void noinline
3669ev_embed_sweep (EV_P_ ev_embed *w) 4413ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3670{ 4414{
3671 ev_run (w->other, EVRUN_NOWAIT); 4415 ev_run (w->other, EVRUN_NOWAIT);
3672} 4416}
3673 4417
3674static void 4418static void
… …
3722 ev_idle_stop (EV_A_ idle); 4466 ev_idle_stop (EV_A_ idle);
3723} 4467}
3724#endif 4468#endif
3725 4469
3726void 4470void
3727ev_embed_start (EV_P_ ev_embed *w) 4471ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3728{ 4472{
3729 if (expect_false (ev_is_active (w))) 4473 if (expect_false (ev_is_active (w)))
3730 return; 4474 return;
3731 4475
3732 { 4476 {
… …
3753 4497
3754 EV_FREQUENT_CHECK; 4498 EV_FREQUENT_CHECK;
3755} 4499}
3756 4500
3757void 4501void
3758ev_embed_stop (EV_P_ ev_embed *w) 4502ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3759{ 4503{
3760 clear_pending (EV_A_ (W)w); 4504 clear_pending (EV_A_ (W)w);
3761 if (expect_false (!ev_is_active (w))) 4505 if (expect_false (!ev_is_active (w)))
3762 return; 4506 return;
3763 4507
… …
3773} 4517}
3774#endif 4518#endif
3775 4519
3776#if EV_FORK_ENABLE 4520#if EV_FORK_ENABLE
3777void 4521void
3778ev_fork_start (EV_P_ ev_fork *w) 4522ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3779{ 4523{
3780 if (expect_false (ev_is_active (w))) 4524 if (expect_false (ev_is_active (w)))
3781 return; 4525 return;
3782 4526
3783 EV_FREQUENT_CHECK; 4527 EV_FREQUENT_CHECK;
… …
3788 4532
3789 EV_FREQUENT_CHECK; 4533 EV_FREQUENT_CHECK;
3790} 4534}
3791 4535
3792void 4536void
3793ev_fork_stop (EV_P_ ev_fork *w) 4537ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3794{ 4538{
3795 clear_pending (EV_A_ (W)w); 4539 clear_pending (EV_A_ (W)w);
3796 if (expect_false (!ev_is_active (w))) 4540 if (expect_false (!ev_is_active (w)))
3797 return; 4541 return;
3798 4542
… …
3811} 4555}
3812#endif 4556#endif
3813 4557
3814#if EV_CLEANUP_ENABLE 4558#if EV_CLEANUP_ENABLE
3815void 4559void
3816ev_cleanup_start (EV_P_ ev_cleanup *w) 4560ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3817{ 4561{
3818 if (expect_false (ev_is_active (w))) 4562 if (expect_false (ev_is_active (w)))
3819 return; 4563 return;
3820 4564
3821 EV_FREQUENT_CHECK; 4565 EV_FREQUENT_CHECK;
… …
3828 ev_unref (EV_A); 4572 ev_unref (EV_A);
3829 EV_FREQUENT_CHECK; 4573 EV_FREQUENT_CHECK;
3830} 4574}
3831 4575
3832void 4576void
3833ev_cleanup_stop (EV_P_ ev_cleanup *w) 4577ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3834{ 4578{
3835 clear_pending (EV_A_ (W)w); 4579 clear_pending (EV_A_ (W)w);
3836 if (expect_false (!ev_is_active (w))) 4580 if (expect_false (!ev_is_active (w)))
3837 return; 4581 return;
3838 4582
… …
3852} 4596}
3853#endif 4597#endif
3854 4598
3855#if EV_ASYNC_ENABLE 4599#if EV_ASYNC_ENABLE
3856void 4600void
3857ev_async_start (EV_P_ ev_async *w) 4601ev_async_start (EV_P_ ev_async *w) EV_THROW
3858{ 4602{
3859 if (expect_false (ev_is_active (w))) 4603 if (expect_false (ev_is_active (w)))
3860 return; 4604 return;
3861 4605
3862 w->sent = 0; 4606 w->sent = 0;
… …
3871 4615
3872 EV_FREQUENT_CHECK; 4616 EV_FREQUENT_CHECK;
3873} 4617}
3874 4618
3875void 4619void
3876ev_async_stop (EV_P_ ev_async *w) 4620ev_async_stop (EV_P_ ev_async *w) EV_THROW
3877{ 4621{
3878 clear_pending (EV_A_ (W)w); 4622 clear_pending (EV_A_ (W)w);
3879 if (expect_false (!ev_is_active (w))) 4623 if (expect_false (!ev_is_active (w)))
3880 return; 4624 return;
3881 4625
… …
3892 4636
3893 EV_FREQUENT_CHECK; 4637 EV_FREQUENT_CHECK;
3894} 4638}
3895 4639
3896void 4640void
3897ev_async_send (EV_P_ ev_async *w) 4641ev_async_send (EV_P_ ev_async *w) EV_THROW
3898{ 4642{
3899 w->sent = 1; 4643 w->sent = 1;
3900 evpipe_write (EV_A_ &async_pending); 4644 evpipe_write (EV_A_ &async_pending);
3901} 4645}
3902#endif 4646#endif
… …
3939 4683
3940 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4684 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3941} 4685}
3942 4686
3943void 4687void
3944ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4688ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3945{ 4689{
3946 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4690 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3947 4691
3948 if (expect_false (!once)) 4692 if (expect_false (!once))
3949 { 4693 {
… …
3971 4715
3972/*****************************************************************************/ 4716/*****************************************************************************/
3973 4717
3974#if EV_WALK_ENABLE 4718#if EV_WALK_ENABLE
3975void ecb_cold 4719void ecb_cold
3976ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4720ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3977{ 4721{
3978 int i, j; 4722 int i, j;
3979 ev_watcher_list *wl, *wn; 4723 ev_watcher_list *wl, *wn;
3980 4724
3981 if (types & (EV_IO | EV_EMBED)) 4725 if (types & (EV_IO | EV_EMBED))
… …
4024 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4768 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4025#endif 4769#endif
4026 4770
4027#if EV_IDLE_ENABLE 4771#if EV_IDLE_ENABLE
4028 if (types & EV_IDLE) 4772 if (types & EV_IDLE)
4029 for (j = NUMPRI; i--; ) 4773 for (j = NUMPRI; j--; )
4030 for (i = idlecnt [j]; i--; ) 4774 for (i = idlecnt [j]; i--; )
4031 cb (EV_A_ EV_IDLE, idles [j][i]); 4775 cb (EV_A_ EV_IDLE, idles [j][i]);
4032#endif 4776#endif
4033 4777
4034#if EV_FORK_ENABLE 4778#if EV_FORK_ENABLE
… …
4087 4831
4088#if EV_MULTIPLICITY 4832#if EV_MULTIPLICITY
4089 #include "ev_wrap.h" 4833 #include "ev_wrap.h"
4090#endif 4834#endif
4091 4835
4092EV_CPP(})
4093

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