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Comparing libev/ev.c (file contents):
Revision 1.389 by root, Wed Aug 3 15:31:23 2011 UTC vs.
Revision 1.460 by root, Tue Oct 29 12:53:38 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 /* better be safe than sorry */ 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 _MSC_VER >= 1400 /* VC++ 2005 */
517 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
518 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
519 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
520 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
521 #elif defined(_WIN32)
522 #include <WinNT.h>
523 #define ECB_MEMORY_FENCE MemoryBarrier ()
524 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
525 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
526 #endif
527#endif
528 745
529#ifndef ECB_MEMORY_FENCE 746#define ECB_CONCAT_(a, b) a ## b
530 #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)
531 750
532 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; 751#define ecb_function_ ecb_inline
533 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
534 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
535 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
536#endif
537 752
538#if ECB_GCC_VERSION(3,1) 753#if ECB_GCC_VERSION(3,1)
539 #define ecb_attribute(attrlist) __attribute__(attrlist) 754 #define ecb_attribute(attrlist) __attribute__(attrlist)
540 #define ecb_is_constant(expr) __builtin_constant_p (expr) 755 #define ecb_is_constant(expr) __builtin_constant_p (expr)
541 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 756 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
… …
545 #define ecb_is_constant(expr) 0 760 #define ecb_is_constant(expr) 0
546 #define ecb_expect(expr,value) (expr) 761 #define ecb_expect(expr,value) (expr)
547 #define ecb_prefetch(addr,rw,locality) 762 #define ecb_prefetch(addr,rw,locality)
548#endif 763#endif
549 764
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
550#define ecb_noinline ecb_attribute ((__noinline__)) 772#define ecb_noinline ecb_attribute ((__noinline__))
551#define ecb_noreturn ecb_attribute ((__noreturn__))
552#define ecb_unused ecb_attribute ((__unused__)) 773#define ecb_unused ecb_attribute ((__unused__))
553#define ecb_const ecb_attribute ((__const__)) 774#define ecb_const ecb_attribute ((__const__))
554#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
555 782
556#if ECB_GCC_VERSION(4,3) 783#if ECB_GCC_VERSION(4,3)
557 #define ecb_artificial ecb_attribute ((__artificial__)) 784 #define ecb_artificial ecb_attribute ((__artificial__))
558 #define ecb_hot ecb_attribute ((__hot__)) 785 #define ecb_hot ecb_attribute ((__hot__))
559 #define ecb_cold ecb_attribute ((__cold__)) 786 #define ecb_cold ecb_attribute ((__cold__))
… …
566/* put around conditional expressions if you are very sure that the */ 793/* put around conditional expressions if you are very sure that the */
567/* expression is mostly true or mostly false. note that these return */ 794/* expression is mostly true or mostly false. note that these return */
568/* booleans, not the expression. */ 795/* booleans, not the expression. */
569#define ecb_expect_false(expr) ecb_expect (!!(expr), 0) 796#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
570#define ecb_expect_true(expr) ecb_expect (!!(expr), 1) 797#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
571/* 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
572 1260
573#define expect_false(cond) ecb_expect_false (cond) 1261#define expect_false(cond) ecb_expect_false (cond)
574#define expect_true(cond) ecb_expect_true (cond) 1262#define expect_true(cond) ecb_expect_true (cond)
575#define noinline ecb_noinline 1263#define noinline ecb_noinline
576 1264
… …
722{ 1410{
723 write (STDERR_FILENO, msg, strlen (msg)); 1411 write (STDERR_FILENO, msg, strlen (msg));
724} 1412}
725#endif 1413#endif
726 1414
727static void (*syserr_cb)(const char *msg); 1415static void (*syserr_cb)(const char *msg) EV_THROW;
728 1416
729void ecb_cold 1417void ecb_cold
730ev_set_syserr_cb (void (*cb)(const char *msg)) 1418ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
731{ 1419{
732 syserr_cb = cb; 1420 syserr_cb = cb;
733} 1421}
734 1422
735static void noinline ecb_cold 1423static void noinline ecb_cold
… …
753 abort (); 1441 abort ();
754 } 1442 }
755} 1443}
756 1444
757static void * 1445static void *
758ev_realloc_emul (void *ptr, long size) 1446ev_realloc_emul (void *ptr, long size) EV_THROW
759{ 1447{
760#if __GLIBC__
761 return realloc (ptr, size);
762#else
763 /* some systems, notably openbsd and darwin, fail to properly 1448 /* some systems, notably openbsd and darwin, fail to properly
764 * 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
765 * 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.
766 */ 1453 */
767 1454
768 if (size) 1455 if (size)
769 return realloc (ptr, size); 1456 return realloc (ptr, size);
770 1457
771 free (ptr); 1458 free (ptr);
772 return 0; 1459 return 0;
773#endif
774} 1460}
775 1461
776static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1462static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
777 1463
778void ecb_cold 1464void ecb_cold
779ev_set_allocator (void *(*cb)(void *ptr, long size)) 1465ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
780{ 1466{
781 alloc = cb; 1467 alloc = cb;
782} 1468}
783 1469
784inline_speed void * 1470inline_speed void *
… …
872 #undef VAR 1558 #undef VAR
873 }; 1559 };
874 #include "ev_wrap.h" 1560 #include "ev_wrap.h"
875 1561
876 static struct ev_loop default_loop_struct; 1562 static struct ev_loop default_loop_struct;
877 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 */
878 1564
879#else 1565#else
880 1566
881 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 */
882 #define VAR(name,decl) static decl; 1568 #define VAR(name,decl) static decl;
883 #include "ev_vars.h" 1569 #include "ev_vars.h"
884 #undef VAR 1570 #undef VAR
885 1571
886 static int ev_default_loop_ptr; 1572 static int ev_default_loop_ptr;
… …
901 1587
902/*****************************************************************************/ 1588/*****************************************************************************/
903 1589
904#ifndef EV_HAVE_EV_TIME 1590#ifndef EV_HAVE_EV_TIME
905ev_tstamp 1591ev_tstamp
906ev_time (void) 1592ev_time (void) EV_THROW
907{ 1593{
908#if EV_USE_REALTIME 1594#if EV_USE_REALTIME
909 if (expect_true (have_realtime)) 1595 if (expect_true (have_realtime))
910 { 1596 {
911 struct timespec ts; 1597 struct timespec ts;
… …
935 return ev_time (); 1621 return ev_time ();
936} 1622}
937 1623
938#if EV_MULTIPLICITY 1624#if EV_MULTIPLICITY
939ev_tstamp 1625ev_tstamp
940ev_now (EV_P) 1626ev_now (EV_P) EV_THROW
941{ 1627{
942 return ev_rt_now; 1628 return ev_rt_now;
943} 1629}
944#endif 1630#endif
945 1631
946void 1632void
947ev_sleep (ev_tstamp delay) 1633ev_sleep (ev_tstamp delay) EV_THROW
948{ 1634{
949 if (delay > 0.) 1635 if (delay > 0.)
950 { 1636 {
951#if EV_USE_NANOSLEEP 1637#if EV_USE_NANOSLEEP
952 struct timespec ts; 1638 struct timespec ts;
953 1639
954 EV_TS_SET (ts, delay); 1640 EV_TS_SET (ts, delay);
955 nanosleep (&ts, 0); 1641 nanosleep (&ts, 0);
956#elif defined(_WIN32) 1642#elif defined _WIN32
957 Sleep ((unsigned long)(delay * 1e3)); 1643 Sleep ((unsigned long)(delay * 1e3));
958#else 1644#else
959 struct timeval tv; 1645 struct timeval tv;
960 1646
961 /* 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 */
… …
980 1666
981 do 1667 do
982 ncur <<= 1; 1668 ncur <<= 1;
983 while (cnt > ncur); 1669 while (cnt > ncur);
984 1670
985 /* 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 */
986 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1672 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
987 { 1673 {
988 ncur *= elem; 1674 ncur *= elem;
989 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);
990 ncur = ncur - sizeof (void *) * 4; 1676 ncur = ncur - sizeof (void *) * 4;
… …
1033pendingcb (EV_P_ ev_prepare *w, int revents) 1719pendingcb (EV_P_ ev_prepare *w, int revents)
1034{ 1720{
1035} 1721}
1036 1722
1037void noinline 1723void noinline
1038ev_feed_event (EV_P_ void *w, int revents) 1724ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1039{ 1725{
1040 W w_ = (W)w; 1726 W w_ = (W)w;
1041 int pri = ABSPRI (w_); 1727 int pri = ABSPRI (w_);
1042 1728
1043 if (expect_false (w_->pending)) 1729 if (expect_false (w_->pending))
… …
1047 w_->pending = ++pendingcnt [pri]; 1733 w_->pending = ++pendingcnt [pri];
1048 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1734 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1049 pendings [pri][w_->pending - 1].w = w_; 1735 pendings [pri][w_->pending - 1].w = w_;
1050 pendings [pri][w_->pending - 1].events = revents; 1736 pendings [pri][w_->pending - 1].events = revents;
1051 } 1737 }
1738
1739 pendingpri = NUMPRI - 1;
1052} 1740}
1053 1741
1054inline_speed void 1742inline_speed void
1055feed_reverse (EV_P_ W w) 1743feed_reverse (EV_P_ W w)
1056{ 1744{
… …
1102 if (expect_true (!anfd->reify)) 1790 if (expect_true (!anfd->reify))
1103 fd_event_nocheck (EV_A_ fd, revents); 1791 fd_event_nocheck (EV_A_ fd, revents);
1104} 1792}
1105 1793
1106void 1794void
1107ev_feed_fd_event (EV_P_ int fd, int revents) 1795ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1108{ 1796{
1109 if (fd >= 0 && fd < anfdmax) 1797 if (fd >= 0 && fd < anfdmax)
1110 fd_event_nocheck (EV_A_ fd, revents); 1798 fd_event_nocheck (EV_A_ fd, revents);
1111} 1799}
1112 1800
… …
1431static void noinline ecb_cold 2119static void noinline ecb_cold
1432evpipe_init (EV_P) 2120evpipe_init (EV_P)
1433{ 2121{
1434 if (!ev_is_active (&pipe_w)) 2122 if (!ev_is_active (&pipe_w))
1435 { 2123 {
2124 int fds [2];
2125
1436# if EV_USE_EVENTFD 2126# if EV_USE_EVENTFD
2127 fds [0] = -1;
1437 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2128 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1438 if (evfd < 0 && errno == EINVAL) 2129 if (fds [1] < 0 && errno == EINVAL)
1439 evfd = eventfd (0, 0); 2130 fds [1] = eventfd (0, 0);
1440 2131
1441 if (evfd >= 0) 2132 if (fds [1] < 0)
2133# endif
1442 { 2134 {
2135 while (pipe (fds))
2136 ev_syserr ("(libev) error creating signal/async pipe");
2137
2138 fd_intern (fds [0]);
2139 }
2140
1443 evpipe [0] = -1; 2141 evpipe [0] = fds [0];
1444 fd_intern (evfd); /* doing it twice doesn't hurt */ 2142
1445 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));
1446 } 2193 }
1447 else 2194 else
1448# endif 2195#endif
1449 { 2196 {
1450 while (pipe (evpipe)) 2197#ifdef _WIN32
1451 ev_syserr ("(libev) error creating signal/async pipe"); 2198 WSABUF buf;
1452 2199 DWORD sent;
1453 fd_intern (evpipe [0]); 2200 buf.buf = &buf;
1454 fd_intern (evpipe [1]); 2201 buf.len = 1;
1455 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2202 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1456 } 2203#else
1457
1458 ev_io_start (EV_A_ &pipe_w);
1459 ev_unref (EV_A); /* watcher should not keep loop alive */
1460 }
1461}
1462
1463inline_speed void
1464evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1465{
1466 if (expect_true (*flag))
1467 return;
1468
1469 *flag = 1;
1470
1471 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1472
1473 pipe_write_skipped = 1;
1474
1475 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1476
1477 if (pipe_write_wanted)
1478 {
1479 int old_errno;
1480
1481 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1482
1483 old_errno = errno; /* save errno because write will clobber it */
1484
1485#if EV_USE_EVENTFD
1486 if (evfd >= 0)
1487 {
1488 uint64_t counter = 1;
1489 write (evfd, &counter, sizeof (uint64_t));
1490 }
1491 else
1492#endif
1493 {
1494 /* win32 people keep sending patches that change this write() to send() */
1495 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1496 /* so when you think this write should be a send instead, please find out */
1497 /* where your send() is from - it's definitely not the microsoft send, and */
1498 /* tell me. thank you. */
1499 write (evpipe [1], &(evpipe [1]), 1); 2204 write (evpipe [1], &(evpipe [1]), 1);
2205#endif
1500 } 2206 }
1501 2207
1502 errno = old_errno; 2208 errno = old_errno;
1503 } 2209 }
1504} 2210}
… …
1511 int i; 2217 int i;
1512 2218
1513 if (revents & EV_READ) 2219 if (revents & EV_READ)
1514 { 2220 {
1515#if EV_USE_EVENTFD 2221#if EV_USE_EVENTFD
1516 if (evfd >= 0) 2222 if (evpipe [0] < 0)
1517 { 2223 {
1518 uint64_t counter; 2224 uint64_t counter;
1519 read (evfd, &counter, sizeof (uint64_t)); 2225 read (evpipe [1], &counter, sizeof (uint64_t));
1520 } 2226 }
1521 else 2227 else
1522#endif 2228#endif
1523 { 2229 {
1524 char dummy; 2230 char dummy[4];
1525 /* 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
1526 read (evpipe [0], &dummy, 1); 2239 read (evpipe [0], &dummy, sizeof (dummy));
2240#endif
1527 } 2241 }
1528 } 2242 }
1529 2243
1530 pipe_write_skipped = 0; 2244 pipe_write_skipped = 0;
2245
2246 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1531 2247
1532#if EV_SIGNAL_ENABLE 2248#if EV_SIGNAL_ENABLE
1533 if (sig_pending) 2249 if (sig_pending)
1534 { 2250 {
1535 sig_pending = 0; 2251 sig_pending = 0;
2252
2253 ECB_MEMORY_FENCE;
1536 2254
1537 for (i = EV_NSIG - 1; i--; ) 2255 for (i = EV_NSIG - 1; i--; )
1538 if (expect_false (signals [i].pending)) 2256 if (expect_false (signals [i].pending))
1539 ev_feed_signal_event (EV_A_ i + 1); 2257 ev_feed_signal_event (EV_A_ i + 1);
1540 } 2258 }
… …
1542 2260
1543#if EV_ASYNC_ENABLE 2261#if EV_ASYNC_ENABLE
1544 if (async_pending) 2262 if (async_pending)
1545 { 2263 {
1546 async_pending = 0; 2264 async_pending = 0;
2265
2266 ECB_MEMORY_FENCE;
1547 2267
1548 for (i = asynccnt; i--; ) 2268 for (i = asynccnt; i--; )
1549 if (asyncs [i]->sent) 2269 if (asyncs [i]->sent)
1550 { 2270 {
1551 asyncs [i]->sent = 0; 2271 asyncs [i]->sent = 0;
2272 ECB_MEMORY_FENCE_RELEASE;
1552 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2273 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1553 } 2274 }
1554 } 2275 }
1555#endif 2276#endif
1556} 2277}
1557 2278
1558/*****************************************************************************/ 2279/*****************************************************************************/
1559 2280
1560void 2281void
1561ev_feed_signal (int signum) 2282ev_feed_signal (int signum) EV_THROW
1562{ 2283{
1563#if EV_MULTIPLICITY 2284#if EV_MULTIPLICITY
2285 EV_P;
2286 ECB_MEMORY_FENCE_ACQUIRE;
1564 EV_P = signals [signum - 1].loop; 2287 EV_A = signals [signum - 1].loop;
1565 2288
1566 if (!EV_A) 2289 if (!EV_A)
1567 return; 2290 return;
1568#endif 2291#endif
1569 2292
1570 if (!ev_active (&pipe_w))
1571 return;
1572
1573 signals [signum - 1].pending = 1; 2293 signals [signum - 1].pending = 1;
1574 evpipe_write (EV_A_ &sig_pending); 2294 evpipe_write (EV_A_ &sig_pending);
1575} 2295}
1576 2296
1577static void 2297static void
… …
1583 2303
1584 ev_feed_signal (signum); 2304 ev_feed_signal (signum);
1585} 2305}
1586 2306
1587void noinline 2307void noinline
1588ev_feed_signal_event (EV_P_ int signum) 2308ev_feed_signal_event (EV_P_ int signum) EV_THROW
1589{ 2309{
1590 WL w; 2310 WL w;
1591 2311
1592 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2312 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1593 return; 2313 return;
1594 2314
1595 --signum; 2315 --signum;
1596 2316
1597#if EV_MULTIPLICITY 2317#if EV_MULTIPLICITY
… …
1601 if (expect_false (signals [signum].loop != EV_A)) 2321 if (expect_false (signals [signum].loop != EV_A))
1602 return; 2322 return;
1603#endif 2323#endif
1604 2324
1605 signals [signum].pending = 0; 2325 signals [signum].pending = 0;
2326 ECB_MEMORY_FENCE_RELEASE;
1606 2327
1607 for (w = signals [signum].head; w; w = w->next) 2328 for (w = signals [signum].head; w; w = w->next)
1608 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2329 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1609} 2330}
1610 2331
… …
1709#if EV_USE_SELECT 2430#if EV_USE_SELECT
1710# include "ev_select.c" 2431# include "ev_select.c"
1711#endif 2432#endif
1712 2433
1713int ecb_cold 2434int ecb_cold
1714ev_version_major (void) 2435ev_version_major (void) EV_THROW
1715{ 2436{
1716 return EV_VERSION_MAJOR; 2437 return EV_VERSION_MAJOR;
1717} 2438}
1718 2439
1719int ecb_cold 2440int ecb_cold
1720ev_version_minor (void) 2441ev_version_minor (void) EV_THROW
1721{ 2442{
1722 return EV_VERSION_MINOR; 2443 return EV_VERSION_MINOR;
1723} 2444}
1724 2445
1725/* 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 */
… …
1733 || getgid () != getegid (); 2454 || getgid () != getegid ();
1734#endif 2455#endif
1735} 2456}
1736 2457
1737unsigned int ecb_cold 2458unsigned int ecb_cold
1738ev_supported_backends (void) 2459ev_supported_backends (void) EV_THROW
1739{ 2460{
1740 unsigned int flags = 0; 2461 unsigned int flags = 0;
1741 2462
1742 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2463 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1743 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2464 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1747 2468
1748 return flags; 2469 return flags;
1749} 2470}
1750 2471
1751unsigned int ecb_cold 2472unsigned int ecb_cold
1752ev_recommended_backends (void) 2473ev_recommended_backends (void) EV_THROW
1753{ 2474{
1754 unsigned int flags = ev_supported_backends (); 2475 unsigned int flags = ev_supported_backends ();
1755 2476
1756#ifndef __NetBSD__ 2477#ifndef __NetBSD__
1757 /* kqueue is borked on everything but netbsd apparently */ 2478 /* kqueue is borked on everything but netbsd apparently */
… …
1769 2490
1770 return flags; 2491 return flags;
1771} 2492}
1772 2493
1773unsigned int ecb_cold 2494unsigned int ecb_cold
1774ev_embeddable_backends (void) 2495ev_embeddable_backends (void) EV_THROW
1775{ 2496{
1776 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2497 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1777 2498
1778 /* 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 */
1779 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 */
… …
1781 2502
1782 return flags; 2503 return flags;
1783} 2504}
1784 2505
1785unsigned int 2506unsigned int
1786ev_backend (EV_P) 2507ev_backend (EV_P) EV_THROW
1787{ 2508{
1788 return backend; 2509 return backend;
1789} 2510}
1790 2511
1791#if EV_FEATURE_API 2512#if EV_FEATURE_API
1792unsigned int 2513unsigned int
1793ev_iteration (EV_P) 2514ev_iteration (EV_P) EV_THROW
1794{ 2515{
1795 return loop_count; 2516 return loop_count;
1796} 2517}
1797 2518
1798unsigned int 2519unsigned int
1799ev_depth (EV_P) 2520ev_depth (EV_P) EV_THROW
1800{ 2521{
1801 return loop_depth; 2522 return loop_depth;
1802} 2523}
1803 2524
1804void 2525void
1805ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2526ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1806{ 2527{
1807 io_blocktime = interval; 2528 io_blocktime = interval;
1808} 2529}
1809 2530
1810void 2531void
1811ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2532ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1812{ 2533{
1813 timeout_blocktime = interval; 2534 timeout_blocktime = interval;
1814} 2535}
1815 2536
1816void 2537void
1817ev_set_userdata (EV_P_ void *data) 2538ev_set_userdata (EV_P_ void *data) EV_THROW
1818{ 2539{
1819 userdata = data; 2540 userdata = data;
1820} 2541}
1821 2542
1822void * 2543void *
1823ev_userdata (EV_P) 2544ev_userdata (EV_P) EV_THROW
1824{ 2545{
1825 return userdata; 2546 return userdata;
1826} 2547}
1827 2548
1828void 2549void
1829ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2550ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1830{ 2551{
1831 invoke_cb = invoke_pending_cb; 2552 invoke_cb = invoke_pending_cb;
1832} 2553}
1833 2554
1834void 2555void
1835ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2556ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1836{ 2557{
1837 release_cb = release; 2558 release_cb = release;
1838 acquire_cb = acquire; 2559 acquire_cb = acquire;
1839} 2560}
1840#endif 2561#endif
1841 2562
1842/* initialise a loop structure, must be zero-initialised */ 2563/* initialise a loop structure, must be zero-initialised */
1843static void noinline ecb_cold 2564static void noinline ecb_cold
1844loop_init (EV_P_ unsigned int flags) 2565loop_init (EV_P_ unsigned int flags) EV_THROW
1845{ 2566{
1846 if (!backend) 2567 if (!backend)
1847 { 2568 {
1848 origflags = flags; 2569 origflags = flags;
1849 2570
… …
1894#if EV_ASYNC_ENABLE 2615#if EV_ASYNC_ENABLE
1895 async_pending = 0; 2616 async_pending = 0;
1896#endif 2617#endif
1897 pipe_write_skipped = 0; 2618 pipe_write_skipped = 0;
1898 pipe_write_wanted = 0; 2619 pipe_write_wanted = 0;
2620 evpipe [0] = -1;
2621 evpipe [1] = -1;
1899#if EV_USE_INOTIFY 2622#if EV_USE_INOTIFY
1900 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2623 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1901#endif 2624#endif
1902#if EV_USE_SIGNALFD 2625#if EV_USE_SIGNALFD
1903 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2626 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
… …
1954 EV_INVOKE_PENDING; 2677 EV_INVOKE_PENDING;
1955 } 2678 }
1956#endif 2679#endif
1957 2680
1958#if EV_CHILD_ENABLE 2681#if EV_CHILD_ENABLE
1959 if (ev_is_active (&childev)) 2682 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1960 { 2683 {
1961 ev_ref (EV_A); /* child watcher */ 2684 ev_ref (EV_A); /* child watcher */
1962 ev_signal_stop (EV_A_ &childev); 2685 ev_signal_stop (EV_A_ &childev);
1963 } 2686 }
1964#endif 2687#endif
… …
1966 if (ev_is_active (&pipe_w)) 2689 if (ev_is_active (&pipe_w))
1967 { 2690 {
1968 /*ev_ref (EV_A);*/ 2691 /*ev_ref (EV_A);*/
1969 /*ev_io_stop (EV_A_ &pipe_w);*/ 2692 /*ev_io_stop (EV_A_ &pipe_w);*/
1970 2693
1971#if EV_USE_EVENTFD
1972 if (evfd >= 0)
1973 close (evfd);
1974#endif
1975
1976 if (evpipe [0] >= 0)
1977 {
1978 EV_WIN32_CLOSE_FD (evpipe [0]); 2694 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1979 EV_WIN32_CLOSE_FD (evpipe [1]); 2695 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1980 }
1981 } 2696 }
1982 2697
1983#if EV_USE_SIGNALFD 2698#if EV_USE_SIGNALFD
1984 if (ev_is_active (&sigfd_w)) 2699 if (ev_is_active (&sigfd_w))
1985 close (sigfd); 2700 close (sigfd);
… …
2071#endif 2786#endif
2072#if EV_USE_INOTIFY 2787#if EV_USE_INOTIFY
2073 infy_fork (EV_A); 2788 infy_fork (EV_A);
2074#endif 2789#endif
2075 2790
2791#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2076 if (ev_is_active (&pipe_w)) 2792 if (ev_is_active (&pipe_w))
2077 { 2793 {
2078 /* 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 */
2079 2795
2080 ev_ref (EV_A); 2796 ev_ref (EV_A);
2081 ev_io_stop (EV_A_ &pipe_w); 2797 ev_io_stop (EV_A_ &pipe_w);
2082 2798
2083#if EV_USE_EVENTFD
2084 if (evfd >= 0)
2085 close (evfd);
2086#endif
2087
2088 if (evpipe [0] >= 0) 2799 if (evpipe [0] >= 0)
2089 {
2090 EV_WIN32_CLOSE_FD (evpipe [0]); 2800 EV_WIN32_CLOSE_FD (evpipe [0]);
2091 EV_WIN32_CLOSE_FD (evpipe [1]);
2092 }
2093 2801
2094#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2095 evpipe_init (EV_A); 2802 evpipe_init (EV_A);
2096 /* now iterate over everything, in case we missed something */ 2803 /* iterate over everything, in case we missed something before */
2097 pipecb (EV_A_ &pipe_w, EV_READ); 2804 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2098#endif
2099 } 2805 }
2806#endif
2100 2807
2101 postfork = 0; 2808 postfork = 0;
2102} 2809}
2103 2810
2104#if EV_MULTIPLICITY 2811#if EV_MULTIPLICITY
2105 2812
2106struct ev_loop * ecb_cold 2813struct ev_loop * ecb_cold
2107ev_loop_new (unsigned int flags) 2814ev_loop_new (unsigned int flags) EV_THROW
2108{ 2815{
2109 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2816 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2110 2817
2111 memset (EV_A, 0, sizeof (struct ev_loop)); 2818 memset (EV_A, 0, sizeof (struct ev_loop));
2112 loop_init (EV_A_ flags); 2819 loop_init (EV_A_ flags);
… …
2156} 2863}
2157#endif 2864#endif
2158 2865
2159#if EV_FEATURE_API 2866#if EV_FEATURE_API
2160void ecb_cold 2867void ecb_cold
2161ev_verify (EV_P) 2868ev_verify (EV_P) EV_THROW
2162{ 2869{
2163#if EV_VERIFY 2870#if EV_VERIFY
2164 int i; 2871 int i;
2165 WL w; 2872 WL w, w2;
2166 2873
2167 assert (activecnt >= -1); 2874 assert (activecnt >= -1);
2168 2875
2169 assert (fdchangemax >= fdchangecnt); 2876 assert (fdchangemax >= fdchangecnt);
2170 for (i = 0; i < fdchangecnt; ++i) 2877 for (i = 0; i < fdchangecnt; ++i)
2171 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2878 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2172 2879
2173 assert (anfdmax >= 0); 2880 assert (anfdmax >= 0);
2174 for (i = 0; i < anfdmax; ++i) 2881 for (i = 0; i < anfdmax; ++i)
2882 {
2883 int j = 0;
2884
2175 for (w = anfds [i].head; w; w = w->next) 2885 for (w = w2 = anfds [i].head; w; w = w->next)
2176 { 2886 {
2177 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
2178 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));
2179 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));
2180 } 2897 }
2898 }
2181 2899
2182 assert (timermax >= timercnt); 2900 assert (timermax >= timercnt);
2183 verify_heap (EV_A_ timers, timercnt); 2901 verify_heap (EV_A_ timers, timercnt);
2184 2902
2185#if EV_PERIODIC_ENABLE 2903#if EV_PERIODIC_ENABLE
… …
2235#if EV_MULTIPLICITY 2953#if EV_MULTIPLICITY
2236struct ev_loop * ecb_cold 2954struct ev_loop * ecb_cold
2237#else 2955#else
2238int 2956int
2239#endif 2957#endif
2240ev_default_loop (unsigned int flags) 2958ev_default_loop (unsigned int flags) EV_THROW
2241{ 2959{
2242 if (!ev_default_loop_ptr) 2960 if (!ev_default_loop_ptr)
2243 { 2961 {
2244#if EV_MULTIPLICITY 2962#if EV_MULTIPLICITY
2245 EV_P = ev_default_loop_ptr = &default_loop_struct; 2963 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2264 2982
2265 return ev_default_loop_ptr; 2983 return ev_default_loop_ptr;
2266} 2984}
2267 2985
2268void 2986void
2269ev_loop_fork (EV_P) 2987ev_loop_fork (EV_P) EV_THROW
2270{ 2988{
2271 postfork = 1; /* must be in line with ev_default_fork */ 2989 postfork = 1;
2272} 2990}
2273 2991
2274/*****************************************************************************/ 2992/*****************************************************************************/
2275 2993
2276void 2994void
… …
2278{ 2996{
2279 EV_CB_INVOKE ((W)w, revents); 2997 EV_CB_INVOKE ((W)w, revents);
2280} 2998}
2281 2999
2282unsigned int 3000unsigned int
2283ev_pending_count (EV_P) 3001ev_pending_count (EV_P) EV_THROW
2284{ 3002{
2285 int pri; 3003 int pri;
2286 unsigned int count = 0; 3004 unsigned int count = 0;
2287 3005
2288 for (pri = NUMPRI; pri--; ) 3006 for (pri = NUMPRI; pri--; )
… …
2292} 3010}
2293 3011
2294void noinline 3012void noinline
2295ev_invoke_pending (EV_P) 3013ev_invoke_pending (EV_P)
2296{ 3014{
2297 int pri; 3015 pendingpri = NUMPRI;
2298 3016
2299 for (pri = NUMPRI; pri--; ) 3017 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3018 {
3019 --pendingpri;
3020
2300 while (pendingcnt [pri]) 3021 while (pendingcnt [pendingpri])
2301 { 3022 {
2302 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3023 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2303 3024
2304 p->w->pending = 0; 3025 p->w->pending = 0;
2305 EV_CB_INVOKE (p->w, p->events); 3026 EV_CB_INVOKE (p->w, p->events);
2306 EV_FREQUENT_CHECK; 3027 EV_FREQUENT_CHECK;
2307 } 3028 }
3029 }
2308} 3030}
2309 3031
2310#if EV_IDLE_ENABLE 3032#if EV_IDLE_ENABLE
2311/* make idle watchers pending. this handles the "call-idle */ 3033/* make idle watchers pending. this handles the "call-idle */
2312/* only when higher priorities are idle" logic */ 3034/* only when higher priorities are idle" logic */
… …
2402{ 3124{
2403 EV_FREQUENT_CHECK; 3125 EV_FREQUENT_CHECK;
2404 3126
2405 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3127 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2406 { 3128 {
2407 int feed_count = 0;
2408
2409 do 3129 do
2410 { 3130 {
2411 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2412 3132
2413 /*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)));*/
… …
2547 3267
2548 mn_now = ev_rt_now; 3268 mn_now = ev_rt_now;
2549 } 3269 }
2550} 3270}
2551 3271
2552void 3272int
2553ev_run (EV_P_ int flags) 3273ev_run (EV_P_ int flags)
2554{ 3274{
2555#if EV_FEATURE_API 3275#if EV_FEATURE_API
2556 ++loop_depth; 3276 ++loop_depth;
2557#endif 3277#endif
… …
2670#endif 3390#endif
2671 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2672 backend_poll (EV_A_ waittime); 3392 backend_poll (EV_A_ waittime);
2673 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2674 3394
2675 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */ 3395 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2676 3396
3397 ECB_MEMORY_FENCE_ACQUIRE;
2677 if (pipe_write_skipped) 3398 if (pipe_write_skipped)
2678 { 3399 {
2679 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)));
2680 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3401 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2681 } 3402 }
… …
2714 loop_done = EVBREAK_CANCEL; 3435 loop_done = EVBREAK_CANCEL;
2715 3436
2716#if EV_FEATURE_API 3437#if EV_FEATURE_API
2717 --loop_depth; 3438 --loop_depth;
2718#endif 3439#endif
3440
3441 return activecnt;
2719} 3442}
2720 3443
2721void 3444void
2722ev_break (EV_P_ int how) 3445ev_break (EV_P_ int how) EV_THROW
2723{ 3446{
2724 loop_done = how; 3447 loop_done = how;
2725} 3448}
2726 3449
2727void 3450void
2728ev_ref (EV_P) 3451ev_ref (EV_P) EV_THROW
2729{ 3452{
2730 ++activecnt; 3453 ++activecnt;
2731} 3454}
2732 3455
2733void 3456void
2734ev_unref (EV_P) 3457ev_unref (EV_P) EV_THROW
2735{ 3458{
2736 --activecnt; 3459 --activecnt;
2737} 3460}
2738 3461
2739void 3462void
2740ev_now_update (EV_P) 3463ev_now_update (EV_P) EV_THROW
2741{ 3464{
2742 time_update (EV_A_ 1e100); 3465 time_update (EV_A_ 1e100);
2743} 3466}
2744 3467
2745void 3468void
2746ev_suspend (EV_P) 3469ev_suspend (EV_P) EV_THROW
2747{ 3470{
2748 ev_now_update (EV_A); 3471 ev_now_update (EV_A);
2749} 3472}
2750 3473
2751void 3474void
2752ev_resume (EV_P) 3475ev_resume (EV_P) EV_THROW
2753{ 3476{
2754 ev_tstamp mn_prev = mn_now; 3477 ev_tstamp mn_prev = mn_now;
2755 3478
2756 ev_now_update (EV_A); 3479 ev_now_update (EV_A);
2757 timers_reschedule (EV_A_ mn_now - mn_prev); 3480 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2796 w->pending = 0; 3519 w->pending = 0;
2797 } 3520 }
2798} 3521}
2799 3522
2800int 3523int
2801ev_clear_pending (EV_P_ void *w) 3524ev_clear_pending (EV_P_ void *w) EV_THROW
2802{ 3525{
2803 W w_ = (W)w; 3526 W w_ = (W)w;
2804 int pending = w_->pending; 3527 int pending = w_->pending;
2805 3528
2806 if (expect_true (pending)) 3529 if (expect_true (pending))
… …
2839} 3562}
2840 3563
2841/*****************************************************************************/ 3564/*****************************************************************************/
2842 3565
2843void noinline 3566void noinline
2844ev_io_start (EV_P_ ev_io *w) 3567ev_io_start (EV_P_ ev_io *w) EV_THROW
2845{ 3568{
2846 int fd = w->fd; 3569 int fd = w->fd;
2847 3570
2848 if (expect_false (ev_is_active (w))) 3571 if (expect_false (ev_is_active (w)))
2849 return; 3572 return;
… …
2855 3578
2856 ev_start (EV_A_ (W)w, 1); 3579 ev_start (EV_A_ (W)w, 1);
2857 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3580 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2858 wlist_add (&anfds[fd].head, (WL)w); 3581 wlist_add (&anfds[fd].head, (WL)w);
2859 3582
3583 /* common bug, apparently */
3584 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3585
2860 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);
2861 w->events &= ~EV__IOFDSET; 3587 w->events &= ~EV__IOFDSET;
2862 3588
2863 EV_FREQUENT_CHECK; 3589 EV_FREQUENT_CHECK;
2864} 3590}
2865 3591
2866void noinline 3592void noinline
2867ev_io_stop (EV_P_ ev_io *w) 3593ev_io_stop (EV_P_ ev_io *w) EV_THROW
2868{ 3594{
2869 clear_pending (EV_A_ (W)w); 3595 clear_pending (EV_A_ (W)w);
2870 if (expect_false (!ev_is_active (w))) 3596 if (expect_false (!ev_is_active (w)))
2871 return; 3597 return;
2872 3598
… …
2881 3607
2882 EV_FREQUENT_CHECK; 3608 EV_FREQUENT_CHECK;
2883} 3609}
2884 3610
2885void noinline 3611void noinline
2886ev_timer_start (EV_P_ ev_timer *w) 3612ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2887{ 3613{
2888 if (expect_false (ev_is_active (w))) 3614 if (expect_false (ev_is_active (w)))
2889 return; 3615 return;
2890 3616
2891 ev_at (w) += mn_now; 3617 ev_at (w) += mn_now;
… …
2905 3631
2906 /*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));*/
2907} 3633}
2908 3634
2909void noinline 3635void noinline
2910ev_timer_stop (EV_P_ ev_timer *w) 3636ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2911{ 3637{
2912 clear_pending (EV_A_ (W)w); 3638 clear_pending (EV_A_ (W)w);
2913 if (expect_false (!ev_is_active (w))) 3639 if (expect_false (!ev_is_active (w)))
2914 return; 3640 return;
2915 3641
… …
2935 3661
2936 EV_FREQUENT_CHECK; 3662 EV_FREQUENT_CHECK;
2937} 3663}
2938 3664
2939void noinline 3665void noinline
2940ev_timer_again (EV_P_ ev_timer *w) 3666ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2941{ 3667{
2942 EV_FREQUENT_CHECK; 3668 EV_FREQUENT_CHECK;
3669
3670 clear_pending (EV_A_ (W)w);
2943 3671
2944 if (ev_is_active (w)) 3672 if (ev_is_active (w))
2945 { 3673 {
2946 if (w->repeat) 3674 if (w->repeat)
2947 { 3675 {
… …
2960 3688
2961 EV_FREQUENT_CHECK; 3689 EV_FREQUENT_CHECK;
2962} 3690}
2963 3691
2964ev_tstamp 3692ev_tstamp
2965ev_timer_remaining (EV_P_ ev_timer *w) 3693ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2966{ 3694{
2967 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3695 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2968} 3696}
2969 3697
2970#if EV_PERIODIC_ENABLE 3698#if EV_PERIODIC_ENABLE
2971void noinline 3699void noinline
2972ev_periodic_start (EV_P_ ev_periodic *w) 3700ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2973{ 3701{
2974 if (expect_false (ev_is_active (w))) 3702 if (expect_false (ev_is_active (w)))
2975 return; 3703 return;
2976 3704
2977 if (w->reschedule_cb) 3705 if (w->reschedule_cb)
… …
2997 3725
2998 /*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));*/
2999} 3727}
3000 3728
3001void noinline 3729void noinline
3002ev_periodic_stop (EV_P_ ev_periodic *w) 3730ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3003{ 3731{
3004 clear_pending (EV_A_ (W)w); 3732 clear_pending (EV_A_ (W)w);
3005 if (expect_false (!ev_is_active (w))) 3733 if (expect_false (!ev_is_active (w)))
3006 return; 3734 return;
3007 3735
… …
3025 3753
3026 EV_FREQUENT_CHECK; 3754 EV_FREQUENT_CHECK;
3027} 3755}
3028 3756
3029void noinline 3757void noinline
3030ev_periodic_again (EV_P_ ev_periodic *w) 3758ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3031{ 3759{
3032 /* TODO: use adjustheap and recalculation */ 3760 /* TODO: use adjustheap and recalculation */
3033 ev_periodic_stop (EV_A_ w); 3761 ev_periodic_stop (EV_A_ w);
3034 ev_periodic_start (EV_A_ w); 3762 ev_periodic_start (EV_A_ w);
3035} 3763}
… …
3040#endif 3768#endif
3041 3769
3042#if EV_SIGNAL_ENABLE 3770#if EV_SIGNAL_ENABLE
3043 3771
3044void noinline 3772void noinline
3045ev_signal_start (EV_P_ ev_signal *w) 3773ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3046{ 3774{
3047 if (expect_false (ev_is_active (w))) 3775 if (expect_false (ev_is_active (w)))
3048 return; 3776 return;
3049 3777
3050 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));
… …
3052#if EV_MULTIPLICITY 3780#if EV_MULTIPLICITY
3053 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",
3054 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3782 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3055 3783
3056 signals [w->signum - 1].loop = EV_A; 3784 signals [w->signum - 1].loop = EV_A;
3785 ECB_MEMORY_FENCE_RELEASE;
3057#endif 3786#endif
3058 3787
3059 EV_FREQUENT_CHECK; 3788 EV_FREQUENT_CHECK;
3060 3789
3061#if EV_USE_SIGNALFD 3790#if EV_USE_SIGNALFD
… …
3121 3850
3122 EV_FREQUENT_CHECK; 3851 EV_FREQUENT_CHECK;
3123} 3852}
3124 3853
3125void noinline 3854void noinline
3126ev_signal_stop (EV_P_ ev_signal *w) 3855ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3127{ 3856{
3128 clear_pending (EV_A_ (W)w); 3857 clear_pending (EV_A_ (W)w);
3129 if (expect_false (!ev_is_active (w))) 3858 if (expect_false (!ev_is_active (w)))
3130 return; 3859 return;
3131 3860
… …
3162#endif 3891#endif
3163 3892
3164#if EV_CHILD_ENABLE 3893#if EV_CHILD_ENABLE
3165 3894
3166void 3895void
3167ev_child_start (EV_P_ ev_child *w) 3896ev_child_start (EV_P_ ev_child *w) EV_THROW
3168{ 3897{
3169#if EV_MULTIPLICITY 3898#if EV_MULTIPLICITY
3170 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));
3171#endif 3900#endif
3172 if (expect_false (ev_is_active (w))) 3901 if (expect_false (ev_is_active (w)))
… …
3179 3908
3180 EV_FREQUENT_CHECK; 3909 EV_FREQUENT_CHECK;
3181} 3910}
3182 3911
3183void 3912void
3184ev_child_stop (EV_P_ ev_child *w) 3913ev_child_stop (EV_P_ ev_child *w) EV_THROW
3185{ 3914{
3186 clear_pending (EV_A_ (W)w); 3915 clear_pending (EV_A_ (W)w);
3187 if (expect_false (!ev_is_active (w))) 3916 if (expect_false (!ev_is_active (w)))
3188 return; 3917 return;
3189 3918
… …
3216# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3945# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3217 3946
3218static void noinline 3947static void noinline
3219infy_add (EV_P_ ev_stat *w) 3948infy_add (EV_P_ ev_stat *w)
3220{ 3949{
3221 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 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);
3222 3954
3223 if (w->wd >= 0) 3955 if (w->wd >= 0)
3224 { 3956 {
3225 struct statfs sfs; 3957 struct statfs sfs;
3226 3958
… …
3230 3962
3231 if (!fs_2625) 3963 if (!fs_2625)
3232 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3964 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3233 else if (!statfs (w->path, &sfs) 3965 else if (!statfs (w->path, &sfs)
3234 && (sfs.f_type == 0x1373 /* devfs */ 3966 && (sfs.f_type == 0x1373 /* devfs */
3967 || sfs.f_type == 0x4006 /* fat */
3968 || sfs.f_type == 0x4d44 /* msdos */
3235 || 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 */
3236 || sfs.f_type == 0x3153464a /* jfs */ 3973 || sfs.f_type == 0x3153464a /* jfs */
3974 || sfs.f_type == 0x9123683e /* btrfs */
3237 || sfs.f_type == 0x52654973 /* reiser3 */ 3975 || sfs.f_type == 0x52654973 /* reiser3 */
3238 || sfs.f_type == 0x01021994 /* tempfs */ 3976 || sfs.f_type == 0x01021994 /* tmpfs */
3239 || sfs.f_type == 0x58465342 /* xfs */)) 3977 || sfs.f_type == 0x58465342 /* xfs */))
3240 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3978 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3241 else 3979 else
3242 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 */
3243 } 3981 }
… …
3356} 4094}
3357 4095
3358inline_size int 4096inline_size int
3359infy_newfd (void) 4097infy_newfd (void)
3360{ 4098{
3361#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4099#if defined IN_CLOEXEC && defined IN_NONBLOCK
3362 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4100 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3363 if (fd >= 0) 4101 if (fd >= 0)
3364 return fd; 4102 return fd;
3365#endif 4103#endif
3366 return inotify_init (); 4104 return inotify_init ();
… …
3441#else 4179#else
3442# define EV_LSTAT(p,b) lstat (p, b) 4180# define EV_LSTAT(p,b) lstat (p, b)
3443#endif 4181#endif
3444 4182
3445void 4183void
3446ev_stat_stat (EV_P_ ev_stat *w) 4184ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3447{ 4185{
3448 if (lstat (w->path, &w->attr) < 0) 4186 if (lstat (w->path, &w->attr) < 0)
3449 w->attr.st_nlink = 0; 4187 w->attr.st_nlink = 0;
3450 else if (!w->attr.st_nlink) 4188 else if (!w->attr.st_nlink)
3451 w->attr.st_nlink = 1; 4189 w->attr.st_nlink = 1;
… …
3490 ev_feed_event (EV_A_ w, EV_STAT); 4228 ev_feed_event (EV_A_ w, EV_STAT);
3491 } 4229 }
3492} 4230}
3493 4231
3494void 4232void
3495ev_stat_start (EV_P_ ev_stat *w) 4233ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3496{ 4234{
3497 if (expect_false (ev_is_active (w))) 4235 if (expect_false (ev_is_active (w)))
3498 return; 4236 return;
3499 4237
3500 ev_stat_stat (EV_A_ w); 4238 ev_stat_stat (EV_A_ w);
… …
3521 4259
3522 EV_FREQUENT_CHECK; 4260 EV_FREQUENT_CHECK;
3523} 4261}
3524 4262
3525void 4263void
3526ev_stat_stop (EV_P_ ev_stat *w) 4264ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3527{ 4265{
3528 clear_pending (EV_A_ (W)w); 4266 clear_pending (EV_A_ (W)w);
3529 if (expect_false (!ev_is_active (w))) 4267 if (expect_false (!ev_is_active (w)))
3530 return; 4268 return;
3531 4269
… …
3547} 4285}
3548#endif 4286#endif
3549 4287
3550#if EV_IDLE_ENABLE 4288#if EV_IDLE_ENABLE
3551void 4289void
3552ev_idle_start (EV_P_ ev_idle *w) 4290ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3553{ 4291{
3554 if (expect_false (ev_is_active (w))) 4292 if (expect_false (ev_is_active (w)))
3555 return; 4293 return;
3556 4294
3557 pri_adjust (EV_A_ (W)w); 4295 pri_adjust (EV_A_ (W)w);
… …
3570 4308
3571 EV_FREQUENT_CHECK; 4309 EV_FREQUENT_CHECK;
3572} 4310}
3573 4311
3574void 4312void
3575ev_idle_stop (EV_P_ ev_idle *w) 4313ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3576{ 4314{
3577 clear_pending (EV_A_ (W)w); 4315 clear_pending (EV_A_ (W)w);
3578 if (expect_false (!ev_is_active (w))) 4316 if (expect_false (!ev_is_active (w)))
3579 return; 4317 return;
3580 4318
… …
3594} 4332}
3595#endif 4333#endif
3596 4334
3597#if EV_PREPARE_ENABLE 4335#if EV_PREPARE_ENABLE
3598void 4336void
3599ev_prepare_start (EV_P_ ev_prepare *w) 4337ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3600{ 4338{
3601 if (expect_false (ev_is_active (w))) 4339 if (expect_false (ev_is_active (w)))
3602 return; 4340 return;
3603 4341
3604 EV_FREQUENT_CHECK; 4342 EV_FREQUENT_CHECK;
… …
3609 4347
3610 EV_FREQUENT_CHECK; 4348 EV_FREQUENT_CHECK;
3611} 4349}
3612 4350
3613void 4351void
3614ev_prepare_stop (EV_P_ ev_prepare *w) 4352ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3615{ 4353{
3616 clear_pending (EV_A_ (W)w); 4354 clear_pending (EV_A_ (W)w);
3617 if (expect_false (!ev_is_active (w))) 4355 if (expect_false (!ev_is_active (w)))
3618 return; 4356 return;
3619 4357
… …
3632} 4370}
3633#endif 4371#endif
3634 4372
3635#if EV_CHECK_ENABLE 4373#if EV_CHECK_ENABLE
3636void 4374void
3637ev_check_start (EV_P_ ev_check *w) 4375ev_check_start (EV_P_ ev_check *w) EV_THROW
3638{ 4376{
3639 if (expect_false (ev_is_active (w))) 4377 if (expect_false (ev_is_active (w)))
3640 return; 4378 return;
3641 4379
3642 EV_FREQUENT_CHECK; 4380 EV_FREQUENT_CHECK;
… …
3647 4385
3648 EV_FREQUENT_CHECK; 4386 EV_FREQUENT_CHECK;
3649} 4387}
3650 4388
3651void 4389void
3652ev_check_stop (EV_P_ ev_check *w) 4390ev_check_stop (EV_P_ ev_check *w) EV_THROW
3653{ 4391{
3654 clear_pending (EV_A_ (W)w); 4392 clear_pending (EV_A_ (W)w);
3655 if (expect_false (!ev_is_active (w))) 4393 if (expect_false (!ev_is_active (w)))
3656 return; 4394 return;
3657 4395
… …
3670} 4408}
3671#endif 4409#endif
3672 4410
3673#if EV_EMBED_ENABLE 4411#if EV_EMBED_ENABLE
3674void noinline 4412void noinline
3675ev_embed_sweep (EV_P_ ev_embed *w) 4413ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3676{ 4414{
3677 ev_run (w->other, EVRUN_NOWAIT); 4415 ev_run (w->other, EVRUN_NOWAIT);
3678} 4416}
3679 4417
3680static void 4418static void
… …
3728 ev_idle_stop (EV_A_ idle); 4466 ev_idle_stop (EV_A_ idle);
3729} 4467}
3730#endif 4468#endif
3731 4469
3732void 4470void
3733ev_embed_start (EV_P_ ev_embed *w) 4471ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3734{ 4472{
3735 if (expect_false (ev_is_active (w))) 4473 if (expect_false (ev_is_active (w)))
3736 return; 4474 return;
3737 4475
3738 { 4476 {
… …
3759 4497
3760 EV_FREQUENT_CHECK; 4498 EV_FREQUENT_CHECK;
3761} 4499}
3762 4500
3763void 4501void
3764ev_embed_stop (EV_P_ ev_embed *w) 4502ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3765{ 4503{
3766 clear_pending (EV_A_ (W)w); 4504 clear_pending (EV_A_ (W)w);
3767 if (expect_false (!ev_is_active (w))) 4505 if (expect_false (!ev_is_active (w)))
3768 return; 4506 return;
3769 4507
… …
3779} 4517}
3780#endif 4518#endif
3781 4519
3782#if EV_FORK_ENABLE 4520#if EV_FORK_ENABLE
3783void 4521void
3784ev_fork_start (EV_P_ ev_fork *w) 4522ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3785{ 4523{
3786 if (expect_false (ev_is_active (w))) 4524 if (expect_false (ev_is_active (w)))
3787 return; 4525 return;
3788 4526
3789 EV_FREQUENT_CHECK; 4527 EV_FREQUENT_CHECK;
… …
3794 4532
3795 EV_FREQUENT_CHECK; 4533 EV_FREQUENT_CHECK;
3796} 4534}
3797 4535
3798void 4536void
3799ev_fork_stop (EV_P_ ev_fork *w) 4537ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3800{ 4538{
3801 clear_pending (EV_A_ (W)w); 4539 clear_pending (EV_A_ (W)w);
3802 if (expect_false (!ev_is_active (w))) 4540 if (expect_false (!ev_is_active (w)))
3803 return; 4541 return;
3804 4542
… …
3817} 4555}
3818#endif 4556#endif
3819 4557
3820#if EV_CLEANUP_ENABLE 4558#if EV_CLEANUP_ENABLE
3821void 4559void
3822ev_cleanup_start (EV_P_ ev_cleanup *w) 4560ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3823{ 4561{
3824 if (expect_false (ev_is_active (w))) 4562 if (expect_false (ev_is_active (w)))
3825 return; 4563 return;
3826 4564
3827 EV_FREQUENT_CHECK; 4565 EV_FREQUENT_CHECK;
… …
3834 ev_unref (EV_A); 4572 ev_unref (EV_A);
3835 EV_FREQUENT_CHECK; 4573 EV_FREQUENT_CHECK;
3836} 4574}
3837 4575
3838void 4576void
3839ev_cleanup_stop (EV_P_ ev_cleanup *w) 4577ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3840{ 4578{
3841 clear_pending (EV_A_ (W)w); 4579 clear_pending (EV_A_ (W)w);
3842 if (expect_false (!ev_is_active (w))) 4580 if (expect_false (!ev_is_active (w)))
3843 return; 4581 return;
3844 4582
… …
3858} 4596}
3859#endif 4597#endif
3860 4598
3861#if EV_ASYNC_ENABLE 4599#if EV_ASYNC_ENABLE
3862void 4600void
3863ev_async_start (EV_P_ ev_async *w) 4601ev_async_start (EV_P_ ev_async *w) EV_THROW
3864{ 4602{
3865 if (expect_false (ev_is_active (w))) 4603 if (expect_false (ev_is_active (w)))
3866 return; 4604 return;
3867 4605
3868 w->sent = 0; 4606 w->sent = 0;
… …
3877 4615
3878 EV_FREQUENT_CHECK; 4616 EV_FREQUENT_CHECK;
3879} 4617}
3880 4618
3881void 4619void
3882ev_async_stop (EV_P_ ev_async *w) 4620ev_async_stop (EV_P_ ev_async *w) EV_THROW
3883{ 4621{
3884 clear_pending (EV_A_ (W)w); 4622 clear_pending (EV_A_ (W)w);
3885 if (expect_false (!ev_is_active (w))) 4623 if (expect_false (!ev_is_active (w)))
3886 return; 4624 return;
3887 4625
… …
3898 4636
3899 EV_FREQUENT_CHECK; 4637 EV_FREQUENT_CHECK;
3900} 4638}
3901 4639
3902void 4640void
3903ev_async_send (EV_P_ ev_async *w) 4641ev_async_send (EV_P_ ev_async *w) EV_THROW
3904{ 4642{
3905 w->sent = 1; 4643 w->sent = 1;
3906 evpipe_write (EV_A_ &async_pending); 4644 evpipe_write (EV_A_ &async_pending);
3907} 4645}
3908#endif 4646#endif
… …
3945 4683
3946 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));
3947} 4685}
3948 4686
3949void 4687void
3950ev_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
3951{ 4689{
3952 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));
3953 4691
3954 if (expect_false (!once)) 4692 if (expect_false (!once))
3955 { 4693 {
… …
3977 4715
3978/*****************************************************************************/ 4716/*****************************************************************************/
3979 4717
3980#if EV_WALK_ENABLE 4718#if EV_WALK_ENABLE
3981void ecb_cold 4719void ecb_cold
3982ev_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
3983{ 4721{
3984 int i, j; 4722 int i, j;
3985 ev_watcher_list *wl, *wn; 4723 ev_watcher_list *wl, *wn;
3986 4724
3987 if (types & (EV_IO | EV_EMBED)) 4725 if (types & (EV_IO | EV_EMBED))
… …
4030 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4768 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4031#endif 4769#endif
4032 4770
4033#if EV_IDLE_ENABLE 4771#if EV_IDLE_ENABLE
4034 if (types & EV_IDLE) 4772 if (types & EV_IDLE)
4035 for (j = NUMPRI; i--; ) 4773 for (j = NUMPRI; j--; )
4036 for (i = idlecnt [j]; i--; ) 4774 for (i = idlecnt [j]; i--; )
4037 cb (EV_A_ EV_IDLE, idles [j][i]); 4775 cb (EV_A_ EV_IDLE, idles [j][i]);
4038#endif 4776#endif
4039 4777
4040#if EV_FORK_ENABLE 4778#if EV_FORK_ENABLE
… …
4093 4831
4094#if EV_MULTIPLICITY 4832#if EV_MULTIPLICITY
4095 #include "ev_wrap.h" 4833 #include "ev_wrap.h"
4096#endif 4834#endif
4097 4835
4098EV_CPP(})
4099

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