ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs.
Revision 1.454 by root, Fri Mar 1 11:13:22 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 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
156# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
157# endif 163# endif
158 164
159#endif 165#endif
160 166
161#include <math.h>
162#include <stdlib.h> 167#include <stdlib.h>
163#include <string.h> 168#include <string.h>
164#include <fcntl.h> 169#include <fcntl.h>
165#include <stddef.h> 170#include <stddef.h>
166 171
… …
178# include EV_H 183# include EV_H
179#else 184#else
180# include "ev.h" 185# include "ev.h"
181#endif 186#endif
182 187
183EV_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
184 198
185#ifndef _WIN32 199#ifndef _WIN32
186# include <sys/time.h> 200# include <sys/time.h>
187# include <sys/wait.h> 201# include <sys/wait.h>
188# include <unistd.h> 202# include <unistd.h>
189#else 203#else
190# include <io.h> 204# include <io.h>
191# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
192# include <windows.h> 207# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
195# endif 210# endif
196# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
205#define _DARWIN_UNLIMITED_SELECT 1 220#define _DARWIN_UNLIMITED_SELECT 1
206 221
207/* 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 */
208 223
209/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 225#if defined EV_NSIG
211/* use what's provided */ 226/* use what's provided */
212#elif defined (NSIG) 227#elif defined NSIG
213# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 229#elif defined _NSIG
215# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 231#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 233#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 237#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 239#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 243#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 245#else
231# error "unable to find value for NSIG, please report" 246# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */ 247/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */ 248/* but consider reporting it, too! :) */
234# define EV_NSIG 65 249# define EV_NSIG 65
235#endif 250#endif
236 251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
237#ifndef EV_USE_CLOCK_SYSCALL 256#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 257# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 259# else
241# define EV_USE_CLOCK_SYSCALL 0 260# define EV_USE_CLOCK_SYSCALL 0
242# endif 261# endif
243#endif 262#endif
244 263
245#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 266# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 267# else
249# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
250# endif 269# endif
251#endif 270#endif
… …
338 357
339#ifndef EV_HEAP_CACHE_AT 358#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 360#endif
342 361
362#ifdef ANDROID
363/* supposedly, android doesn't typedef fd_mask */
364# undef EV_USE_SELECT
365# define EV_USE_SELECT 0
366/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
367# undef EV_USE_CLOCK_SYSCALL
368# define EV_USE_CLOCK_SYSCALL 0
369#endif
370
371/* aix's poll.h seems to cause lots of trouble */
372#ifdef _AIX
373/* AIX has a completely broken poll.h header */
374# undef EV_USE_POLL
375# define EV_USE_POLL 0
376#endif
377
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 378/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 379/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 380#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 381# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 382# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 383# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 385# define EV_USE_MONOTONIC 1
351# else 386# else
… …
354# endif 389# endif
355#endif 390#endif
356 391
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 392/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 393
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 394#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 395# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 396# define EV_USE_MONOTONIC 0
368#endif 397#endif
369 398
… …
377# define EV_USE_INOTIFY 0 406# define EV_USE_INOTIFY 0
378#endif 407#endif
379 408
380#if !EV_USE_NANOSLEEP 409#if !EV_USE_NANOSLEEP
381/* hp-ux has it in sys/time.h, which we unconditionally include above */ 410/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux) 411# if !defined _WIN32 && !defined __hpux
383# include <sys/select.h> 412# include <sys/select.h>
384# endif 413# endif
385#endif 414#endif
386 415
387#if EV_USE_INOTIFY 416#if EV_USE_INOTIFY
… …
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 419/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 420# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 421# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 422# define EV_USE_INOTIFY 0
394# endif 423# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 424#endif
400 425
401#if EV_USE_EVENTFD 426#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 428# include <stdint.h>
… …
443#else 468#else
444# define EV_FREQUENT_CHECK do { } while (0) 469# define EV_FREQUENT_CHECK do { } while (0)
445#endif 470#endif
446 471
447/* 472/*
448 * This is used to avoid floating point rounding problems. 473 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 474 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 475 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 476#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
477/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 478
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 479#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 480#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 481
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 482#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 483#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 484
485/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
486/* ECB.H BEGIN */
487/*
488 * libecb - http://software.schmorp.de/pkg/libecb
489 *
490 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
491 * Copyright (©) 2011 Emanuele Giaquinta
492 * All rights reserved.
493 *
494 * Redistribution and use in source and binary forms, with or without modifica-
495 * tion, are permitted provided that the following conditions are met:
496 *
497 * 1. Redistributions of source code must retain the above copyright notice,
498 * this list of conditions and the following disclaimer.
499 *
500 * 2. Redistributions in binary form must reproduce the above copyright
501 * notice, this list of conditions and the following disclaimer in the
502 * documentation and/or other materials provided with the distribution.
503 *
504 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
505 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
506 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
507 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
508 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
509 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
510 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
511 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
512 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
513 * OF THE POSSIBILITY OF SUCH DAMAGE.
514 */
515
516#ifndef ECB_H
517#define ECB_H
518
519/* 16 bits major, 16 bits minor */
520#define ECB_VERSION 0x00010003
521
522#ifdef _WIN32
523 typedef signed char int8_t;
524 typedef unsigned char uint8_t;
525 typedef signed short int16_t;
526 typedef unsigned short uint16_t;
527 typedef signed int int32_t;
528 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 529 #if __GNUC__
464# define expect(expr,value) __builtin_expect ((expr),(value)) 530 typedef signed long long int64_t;
465# define noinline __attribute__ ((noinline)) 531 typedef unsigned long long uint64_t;
532 #else /* _MSC_VER || __BORLANDC__ */
533 typedef signed __int64 int64_t;
534 typedef unsigned __int64 uint64_t;
535 #endif
536 #ifdef _WIN64
537 #define ECB_PTRSIZE 8
538 typedef uint64_t uintptr_t;
539 typedef int64_t intptr_t;
540 #else
541 #define ECB_PTRSIZE 4
542 typedef uint32_t uintptr_t;
543 typedef int32_t intptr_t;
544 #endif
466#else 545#else
467# define expect(expr,value) (expr) 546 #include <inttypes.h>
468# define noinline 547 #if UINTMAX_MAX > 0xffffffffU
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 548 #define ECB_PTRSIZE 8
470# define inline 549 #else
550 #define ECB_PTRSIZE 4
551 #endif
471# endif 552#endif
553
554/* work around x32 idiocy by defining proper macros */
555#if __x86_64 || _M_AMD64
556 #if __ILP32
557 #define ECB_AMD64_X32 1
558 #else
559 #define ECB_AMD64 1
472#endif 560 #endif
561#endif
473 562
563/* many compilers define _GNUC_ to some versions but then only implement
564 * what their idiot authors think are the "more important" extensions,
565 * causing enormous grief in return for some better fake benchmark numbers.
566 * or so.
567 * we try to detect these and simply assume they are not gcc - if they have
568 * an issue with that they should have done it right in the first place.
569 */
570#ifndef ECB_GCC_VERSION
571 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
572 #define ECB_GCC_VERSION(major,minor) 0
573 #else
574 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
575 #endif
576#endif
577
578#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
579#define ECB_C99 (__STDC_VERSION__ >= 199901L)
580#define ECB_C11 (__STDC_VERSION__ >= 201112L)
581#define ECB_CPP (__cplusplus+0)
582#define ECB_CPP11 (__cplusplus >= 201103L)
583
584#if ECB_CPP
585 #define ECB_EXTERN_C extern "C"
586 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
587 #define ECB_EXTERN_C_END }
588#else
589 #define ECB_EXTERN_C extern
590 #define ECB_EXTERN_C_BEG
591 #define ECB_EXTERN_C_END
592#endif
593
594/*****************************************************************************/
595
596/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
597/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
598
599#if ECB_NO_THREADS
600 #define ECB_NO_SMP 1
601#endif
602
603#if ECB_NO_SMP
604 #define ECB_MEMORY_FENCE do { } while (0)
605#endif
606
607#ifndef ECB_MEMORY_FENCE
608 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
609 #if __i386 || __i386__
610 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
611 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
612 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
613 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
614 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
615 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
616 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
617 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
618 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
619 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
620 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
622 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
623 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
624 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
625 #elif __sparc || __sparc__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
629 #elif defined __s390__ || defined __s390x__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
631 #elif defined __mips__
632 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
633 #elif defined __alpha__
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
635 #elif defined __hppa__
636 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
637 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
638 #elif defined __ia64__
639 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
640 #endif
641 #endif
642#endif
643
644#ifndef ECB_MEMORY_FENCE
645 #if ECB_GCC_VERSION(4,7)
646 /* see comment below (stdatomic.h) about the C11 memory model. */
647 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
648
649 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
650 * without risking compile time errors with other compilers. We *could*
651 * define our own ecb_clang_has_feature, but I just can't be bothered to work
652 * around this shit time and again.
653 * #elif defined __clang && __has_feature (cxx_atomic)
654 * // see comment below (stdatomic.h) about the C11 memory model.
655 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
656 */
657
658 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
659 #define ECB_MEMORY_FENCE __sync_synchronize ()
660 #elif _MSC_VER >= 1400 /* VC++ 2005 */
661 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
662 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
663 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
664 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
665 #elif defined _WIN32
666 #include <WinNT.h>
667 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
668 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
669 #include <mbarrier.h>
670 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
671 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
672 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
673 #elif __xlC__
674 #define ECB_MEMORY_FENCE __sync ()
675 #endif
676#endif
677
678#ifndef ECB_MEMORY_FENCE
679 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
680 /* we assume that these memory fences work on all variables/all memory accesses, */
681 /* not just C11 atomics and atomic accesses */
682 #include <stdatomic.h>
683 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
684 /* any fence other than seq_cst, which isn't very efficient for us. */
685 /* Why that is, we don't know - either the C11 memory model is quite useless */
686 /* for most usages, or gcc and clang have a bug */
687 /* I *currently* lean towards the latter, and inefficiently implement */
688 /* all three of ecb's fences as a seq_cst fence */
689 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
690 #endif
691#endif
692
693#ifndef ECB_MEMORY_FENCE
694 #if !ECB_AVOID_PTHREADS
695 /*
696 * if you get undefined symbol references to pthread_mutex_lock,
697 * or failure to find pthread.h, then you should implement
698 * the ECB_MEMORY_FENCE operations for your cpu/compiler
699 * OR provide pthread.h and link against the posix thread library
700 * of your system.
701 */
702 #include <pthread.h>
703 #define ECB_NEEDS_PTHREADS 1
704 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
705
706 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
707 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
708 #endif
709#endif
710
711#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
712 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
713#endif
714
715#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
716 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
717#endif
718
719/*****************************************************************************/
720
721#if __cplusplus
722 #define ecb_inline static inline
723#elif ECB_GCC_VERSION(2,5)
724 #define ecb_inline static __inline__
725#elif ECB_C99
726 #define ecb_inline static inline
727#else
728 #define ecb_inline static
729#endif
730
731#if ECB_GCC_VERSION(3,3)
732 #define ecb_restrict __restrict__
733#elif ECB_C99
734 #define ecb_restrict restrict
735#else
736 #define ecb_restrict
737#endif
738
739typedef int ecb_bool;
740
741#define ECB_CONCAT_(a, b) a ## b
742#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
743#define ECB_STRINGIFY_(a) # a
744#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
745
746#define ecb_function_ ecb_inline
747
748#if ECB_GCC_VERSION(3,1)
749 #define ecb_attribute(attrlist) __attribute__(attrlist)
750 #define ecb_is_constant(expr) __builtin_constant_p (expr)
751 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
752 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
753#else
754 #define ecb_attribute(attrlist)
755 #define ecb_is_constant(expr) 0
756 #define ecb_expect(expr,value) (expr)
757 #define ecb_prefetch(addr,rw,locality)
758#endif
759
760/* no emulation for ecb_decltype */
761#if ECB_GCC_VERSION(4,5)
762 #define ecb_decltype(x) __decltype(x)
763#elif ECB_GCC_VERSION(3,0)
764 #define ecb_decltype(x) __typeof(x)
765#endif
766
767#define ecb_noinline ecb_attribute ((__noinline__))
768#define ecb_unused ecb_attribute ((__unused__))
769#define ecb_const ecb_attribute ((__const__))
770#define ecb_pure ecb_attribute ((__pure__))
771
772#if ECB_C11
773 #define ecb_noreturn _Noreturn
774#else
775 #define ecb_noreturn ecb_attribute ((__noreturn__))
776#endif
777
778#if ECB_GCC_VERSION(4,3)
779 #define ecb_artificial ecb_attribute ((__artificial__))
780 #define ecb_hot ecb_attribute ((__hot__))
781 #define ecb_cold ecb_attribute ((__cold__))
782#else
783 #define ecb_artificial
784 #define ecb_hot
785 #define ecb_cold
786#endif
787
788/* put around conditional expressions if you are very sure that the */
789/* expression is mostly true or mostly false. note that these return */
790/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 791#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 792#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
793/* for compatibility to the rest of the world */
794#define ecb_likely(expr) ecb_expect_true (expr)
795#define ecb_unlikely(expr) ecb_expect_false (expr)
796
797/* count trailing zero bits and count # of one bits */
798#if ECB_GCC_VERSION(3,4)
799 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
800 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
801 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
802 #define ecb_ctz32(x) __builtin_ctz (x)
803 #define ecb_ctz64(x) __builtin_ctzll (x)
804 #define ecb_popcount32(x) __builtin_popcount (x)
805 /* no popcountll */
806#else
807 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
808 ecb_function_ int
809 ecb_ctz32 (uint32_t x)
810 {
811 int r = 0;
812
813 x &= ~x + 1; /* this isolates the lowest bit */
814
815#if ECB_branchless_on_i386
816 r += !!(x & 0xaaaaaaaa) << 0;
817 r += !!(x & 0xcccccccc) << 1;
818 r += !!(x & 0xf0f0f0f0) << 2;
819 r += !!(x & 0xff00ff00) << 3;
820 r += !!(x & 0xffff0000) << 4;
821#else
822 if (x & 0xaaaaaaaa) r += 1;
823 if (x & 0xcccccccc) r += 2;
824 if (x & 0xf0f0f0f0) r += 4;
825 if (x & 0xff00ff00) r += 8;
826 if (x & 0xffff0000) r += 16;
827#endif
828
829 return r;
830 }
831
832 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
833 ecb_function_ int
834 ecb_ctz64 (uint64_t x)
835 {
836 int shift = x & 0xffffffffU ? 0 : 32;
837 return ecb_ctz32 (x >> shift) + shift;
838 }
839
840 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
841 ecb_function_ int
842 ecb_popcount32 (uint32_t x)
843 {
844 x -= (x >> 1) & 0x55555555;
845 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
846 x = ((x >> 4) + x) & 0x0f0f0f0f;
847 x *= 0x01010101;
848
849 return x >> 24;
850 }
851
852 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
853 ecb_function_ int ecb_ld32 (uint32_t x)
854 {
855 int r = 0;
856
857 if (x >> 16) { x >>= 16; r += 16; }
858 if (x >> 8) { x >>= 8; r += 8; }
859 if (x >> 4) { x >>= 4; r += 4; }
860 if (x >> 2) { x >>= 2; r += 2; }
861 if (x >> 1) { r += 1; }
862
863 return r;
864 }
865
866 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
867 ecb_function_ int ecb_ld64 (uint64_t x)
868 {
869 int r = 0;
870
871 if (x >> 32) { x >>= 32; r += 32; }
872
873 return r + ecb_ld32 (x);
874 }
875#endif
876
877ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
878ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
879ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
880ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
881
882ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
883ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
884{
885 return ( (x * 0x0802U & 0x22110U)
886 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
887}
888
889ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
890ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
891{
892 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
893 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
894 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
895 x = ( x >> 8 ) | ( x << 8);
896
897 return x;
898}
899
900ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
901ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
902{
903 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
904 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
905 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
906 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
907 x = ( x >> 16 ) | ( x << 16);
908
909 return x;
910}
911
912/* popcount64 is only available on 64 bit cpus as gcc builtin */
913/* so for this version we are lazy */
914ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
915ecb_function_ int
916ecb_popcount64 (uint64_t x)
917{
918 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
919}
920
921ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
922ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
923ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
924ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
925ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
926ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
927ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
928ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
929
930ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
931ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
932ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
933ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
934ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
935ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
936ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
937ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
938
939#if ECB_GCC_VERSION(4,3)
940 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
941 #define ecb_bswap32(x) __builtin_bswap32 (x)
942 #define ecb_bswap64(x) __builtin_bswap64 (x)
943#else
944 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
945 ecb_function_ uint16_t
946 ecb_bswap16 (uint16_t x)
947 {
948 return ecb_rotl16 (x, 8);
949 }
950
951 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
952 ecb_function_ uint32_t
953 ecb_bswap32 (uint32_t x)
954 {
955 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
956 }
957
958 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
959 ecb_function_ uint64_t
960 ecb_bswap64 (uint64_t x)
961 {
962 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
963 }
964#endif
965
966#if ECB_GCC_VERSION(4,5)
967 #define ecb_unreachable() __builtin_unreachable ()
968#else
969 /* this seems to work fine, but gcc always emits a warning for it :/ */
970 ecb_inline void ecb_unreachable (void) ecb_noreturn;
971 ecb_inline void ecb_unreachable (void) { }
972#endif
973
974/* try to tell the compiler that some condition is definitely true */
975#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
976
977ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
978ecb_inline unsigned char
979ecb_byteorder_helper (void)
980{
981 /* the union code still generates code under pressure in gcc, */
982 /* but less than using pointers, and always seems to */
983 /* successfully return a constant. */
984 /* the reason why we have this horrible preprocessor mess */
985 /* is to avoid it in all cases, at least on common architectures */
986 /* or when using a recent enough gcc version (>= 4.6) */
987#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
988 return 0x44;
989#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
990 return 0x44;
991#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
992 return 0x11;
993#else
994 union
995 {
996 uint32_t i;
997 uint8_t c;
998 } u = { 0x11223344 };
999 return u.c;
1000#endif
1001}
1002
1003ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1004ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1005ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1006ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1007
1008#if ECB_GCC_VERSION(3,0) || ECB_C99
1009 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1010#else
1011 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1012#endif
1013
1014#if __cplusplus
1015 template<typename T>
1016 static inline T ecb_div_rd (T val, T div)
1017 {
1018 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1019 }
1020 template<typename T>
1021 static inline T ecb_div_ru (T val, T div)
1022 {
1023 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1024 }
1025#else
1026 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1027 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1028#endif
1029
1030#if ecb_cplusplus_does_not_suck
1031 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1032 template<typename T, int N>
1033 static inline int ecb_array_length (const T (&arr)[N])
1034 {
1035 return N;
1036 }
1037#else
1038 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1039#endif
1040
1041/*******************************************************************************/
1042/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1043
1044/* basically, everything uses "ieee pure-endian" floating point numbers */
1045/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1046#if 0 \
1047 || __i386 || __i386__ \
1048 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1049 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1050 || defined __arm__ && defined __ARM_EABI__ \
1051 || defined __s390__ || defined __s390x__ \
1052 || defined __mips__ \
1053 || defined __alpha__ \
1054 || defined __hppa__ \
1055 || defined __ia64__ \
1056 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1057 #define ECB_STDFP 1
1058 #include <string.h> /* for memcpy */
1059#else
1060 #define ECB_STDFP 0
1061 #include <math.h> /* for frexp*, ldexp* */
1062#endif
1063
1064#ifndef ECB_NO_LIBM
1065
1066 /* convert a float to ieee single/binary32 */
1067 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1068 ecb_function_ uint32_t
1069 ecb_float_to_binary32 (float x)
1070 {
1071 uint32_t r;
1072
1073 #if ECB_STDFP
1074 memcpy (&r, &x, 4);
1075 #else
1076 /* slow emulation, works for anything but -0 */
1077 uint32_t m;
1078 int e;
1079
1080 if (x == 0e0f ) return 0x00000000U;
1081 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1082 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1083 if (x != x ) return 0x7fbfffffU;
1084
1085 m = frexpf (x, &e) * 0x1000000U;
1086
1087 r = m & 0x80000000U;
1088
1089 if (r)
1090 m = -m;
1091
1092 if (e <= -126)
1093 {
1094 m &= 0xffffffU;
1095 m >>= (-125 - e);
1096 e = -126;
1097 }
1098
1099 r |= (e + 126) << 23;
1100 r |= m & 0x7fffffU;
1101 #endif
1102
1103 return r;
1104 }
1105
1106 /* converts an ieee single/binary32 to a float */
1107 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1108 ecb_function_ float
1109 ecb_binary32_to_float (uint32_t x)
1110 {
1111 float r;
1112
1113 #if ECB_STDFP
1114 memcpy (&r, &x, 4);
1115 #else
1116 /* emulation, only works for normals and subnormals and +0 */
1117 int neg = x >> 31;
1118 int e = (x >> 23) & 0xffU;
1119
1120 x &= 0x7fffffU;
1121
1122 if (e)
1123 x |= 0x800000U;
1124 else
1125 e = 1;
1126
1127 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1128 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1129
1130 r = neg ? -r : r;
1131 #endif
1132
1133 return r;
1134 }
1135
1136 /* convert a double to ieee double/binary64 */
1137 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1138 ecb_function_ uint64_t
1139 ecb_double_to_binary64 (double x)
1140 {
1141 uint64_t r;
1142
1143 #if ECB_STDFP
1144 memcpy (&r, &x, 8);
1145 #else
1146 /* slow emulation, works for anything but -0 */
1147 uint64_t m;
1148 int e;
1149
1150 if (x == 0e0 ) return 0x0000000000000000U;
1151 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1152 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1153 if (x != x ) return 0X7ff7ffffffffffffU;
1154
1155 m = frexp (x, &e) * 0x20000000000000U;
1156
1157 r = m & 0x8000000000000000;;
1158
1159 if (r)
1160 m = -m;
1161
1162 if (e <= -1022)
1163 {
1164 m &= 0x1fffffffffffffU;
1165 m >>= (-1021 - e);
1166 e = -1022;
1167 }
1168
1169 r |= ((uint64_t)(e + 1022)) << 52;
1170 r |= m & 0xfffffffffffffU;
1171 #endif
1172
1173 return r;
1174 }
1175
1176 /* converts an ieee double/binary64 to a double */
1177 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1178 ecb_function_ double
1179 ecb_binary64_to_double (uint64_t x)
1180 {
1181 double r;
1182
1183 #if ECB_STDFP
1184 memcpy (&r, &x, 8);
1185 #else
1186 /* emulation, only works for normals and subnormals and +0 */
1187 int neg = x >> 63;
1188 int e = (x >> 52) & 0x7ffU;
1189
1190 x &= 0xfffffffffffffU;
1191
1192 if (e)
1193 x |= 0x10000000000000U;
1194 else
1195 e = 1;
1196
1197 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1198 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1199
1200 r = neg ? -r : r;
1201 #endif
1202
1203 return r;
1204 }
1205
1206#endif
1207
1208#endif
1209
1210/* ECB.H END */
1211
1212#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1213/* if your architecture doesn't need memory fences, e.g. because it is
1214 * single-cpu/core, or if you use libev in a project that doesn't use libev
1215 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1216 * libev, in which cases the memory fences become nops.
1217 * alternatively, you can remove this #error and link against libpthread,
1218 * which will then provide the memory fences.
1219 */
1220# error "memory fences not defined for your architecture, please report"
1221#endif
1222
1223#ifndef ECB_MEMORY_FENCE
1224# define ECB_MEMORY_FENCE do { } while (0)
1225# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1226# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1227#endif
1228
1229#define expect_false(cond) ecb_expect_false (cond)
1230#define expect_true(cond) ecb_expect_true (cond)
1231#define noinline ecb_noinline
1232
476#define inline_size static inline 1233#define inline_size ecb_inline
477 1234
478#if EV_FEATURE_CODE 1235#if EV_FEATURE_CODE
479# define inline_speed static inline 1236# define inline_speed ecb_inline
480#else 1237#else
481# define inline_speed static noinline 1238# define inline_speed static noinline
482#endif 1239#endif
483 1240
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1241#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
523# include "ev_win32.c" 1280# include "ev_win32.c"
524#endif 1281#endif
525 1282
526/*****************************************************************************/ 1283/*****************************************************************************/
527 1284
1285/* define a suitable floor function (only used by periodics atm) */
1286
1287#if EV_USE_FLOOR
1288# include <math.h>
1289# define ev_floor(v) floor (v)
1290#else
1291
1292#include <float.h>
1293
1294/* a floor() replacement function, should be independent of ev_tstamp type */
1295static ev_tstamp noinline
1296ev_floor (ev_tstamp v)
1297{
1298 /* the choice of shift factor is not terribly important */
1299#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1300 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1301#else
1302 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1303#endif
1304
1305 /* argument too large for an unsigned long? */
1306 if (expect_false (v >= shift))
1307 {
1308 ev_tstamp f;
1309
1310 if (v == v - 1.)
1311 return v; /* very large number */
1312
1313 f = shift * ev_floor (v * (1. / shift));
1314 return f + ev_floor (v - f);
1315 }
1316
1317 /* special treatment for negative args? */
1318 if (expect_false (v < 0.))
1319 {
1320 ev_tstamp f = -ev_floor (-v);
1321
1322 return f - (f == v ? 0 : 1);
1323 }
1324
1325 /* fits into an unsigned long */
1326 return (unsigned long)v;
1327}
1328
1329#endif
1330
1331/*****************************************************************************/
1332
528#ifdef __linux 1333#ifdef __linux
529# include <sys/utsname.h> 1334# include <sys/utsname.h>
530#endif 1335#endif
531 1336
532static unsigned int noinline 1337static unsigned int noinline ecb_cold
533ev_linux_version (void) 1338ev_linux_version (void)
534{ 1339{
535#ifdef __linux 1340#ifdef __linux
536 unsigned int v = 0; 1341 unsigned int v = 0;
537 struct utsname buf; 1342 struct utsname buf;
… …
566} 1371}
567 1372
568/*****************************************************************************/ 1373/*****************************************************************************/
569 1374
570#if EV_AVOID_STDIO 1375#if EV_AVOID_STDIO
571static void noinline 1376static void noinline ecb_cold
572ev_printerr (const char *msg) 1377ev_printerr (const char *msg)
573{ 1378{
574 write (STDERR_FILENO, msg, strlen (msg)); 1379 write (STDERR_FILENO, msg, strlen (msg));
575} 1380}
576#endif 1381#endif
577 1382
578static void (*syserr_cb)(const char *msg); 1383static void (*syserr_cb)(const char *msg) EV_THROW;
579 1384
580void 1385void ecb_cold
581ev_set_syserr_cb (void (*cb)(const char *msg)) 1386ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
582{ 1387{
583 syserr_cb = cb; 1388 syserr_cb = cb;
584} 1389}
585 1390
586static void noinline 1391static void noinline ecb_cold
587ev_syserr (const char *msg) 1392ev_syserr (const char *msg)
588{ 1393{
589 if (!msg) 1394 if (!msg)
590 msg = "(libev) system error"; 1395 msg = "(libev) system error";
591 1396
… …
604 abort (); 1409 abort ();
605 } 1410 }
606} 1411}
607 1412
608static void * 1413static void *
609ev_realloc_emul (void *ptr, long size) 1414ev_realloc_emul (void *ptr, long size) EV_THROW
610{ 1415{
611#if __GLIBC__
612 return realloc (ptr, size);
613#else
614 /* some systems, notably openbsd and darwin, fail to properly 1416 /* some systems, notably openbsd and darwin, fail to properly
615 * implement realloc (x, 0) (as required by both ansi c-89 and 1417 * implement realloc (x, 0) (as required by both ansi c-89 and
616 * the single unix specification, so work around them here. 1418 * the single unix specification, so work around them here.
1419 * recently, also (at least) fedora and debian started breaking it,
1420 * despite documenting it otherwise.
617 */ 1421 */
618 1422
619 if (size) 1423 if (size)
620 return realloc (ptr, size); 1424 return realloc (ptr, size);
621 1425
622 free (ptr); 1426 free (ptr);
623 return 0; 1427 return 0;
624#endif
625} 1428}
626 1429
627static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1430static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
628 1431
629void 1432void ecb_cold
630ev_set_allocator (void *(*cb)(void *ptr, long size)) 1433ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
631{ 1434{
632 alloc = cb; 1435 alloc = cb;
633} 1436}
634 1437
635inline_speed void * 1438inline_speed void *
… …
723 #undef VAR 1526 #undef VAR
724 }; 1527 };
725 #include "ev_wrap.h" 1528 #include "ev_wrap.h"
726 1529
727 static struct ev_loop default_loop_struct; 1530 static struct ev_loop default_loop_struct;
728 struct ev_loop *ev_default_loop_ptr; 1531 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
729 1532
730#else 1533#else
731 1534
732 ev_tstamp ev_rt_now; 1535 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
733 #define VAR(name,decl) static decl; 1536 #define VAR(name,decl) static decl;
734 #include "ev_vars.h" 1537 #include "ev_vars.h"
735 #undef VAR 1538 #undef VAR
736 1539
737 static int ev_default_loop_ptr; 1540 static int ev_default_loop_ptr;
… …
752 1555
753/*****************************************************************************/ 1556/*****************************************************************************/
754 1557
755#ifndef EV_HAVE_EV_TIME 1558#ifndef EV_HAVE_EV_TIME
756ev_tstamp 1559ev_tstamp
757ev_time (void) 1560ev_time (void) EV_THROW
758{ 1561{
759#if EV_USE_REALTIME 1562#if EV_USE_REALTIME
760 if (expect_true (have_realtime)) 1563 if (expect_true (have_realtime))
761 { 1564 {
762 struct timespec ts; 1565 struct timespec ts;
… …
786 return ev_time (); 1589 return ev_time ();
787} 1590}
788 1591
789#if EV_MULTIPLICITY 1592#if EV_MULTIPLICITY
790ev_tstamp 1593ev_tstamp
791ev_now (EV_P) 1594ev_now (EV_P) EV_THROW
792{ 1595{
793 return ev_rt_now; 1596 return ev_rt_now;
794} 1597}
795#endif 1598#endif
796 1599
797void 1600void
798ev_sleep (ev_tstamp delay) 1601ev_sleep (ev_tstamp delay) EV_THROW
799{ 1602{
800 if (delay > 0.) 1603 if (delay > 0.)
801 { 1604 {
802#if EV_USE_NANOSLEEP 1605#if EV_USE_NANOSLEEP
803 struct timespec ts; 1606 struct timespec ts;
804 1607
805 EV_TS_SET (ts, delay); 1608 EV_TS_SET (ts, delay);
806 nanosleep (&ts, 0); 1609 nanosleep (&ts, 0);
807#elif defined(_WIN32) 1610#elif defined _WIN32
808 Sleep ((unsigned long)(delay * 1e3)); 1611 Sleep ((unsigned long)(delay * 1e3));
809#else 1612#else
810 struct timeval tv; 1613 struct timeval tv;
811 1614
812 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1615 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
816 select (0, 0, 0, 0, &tv); 1619 select (0, 0, 0, 0, &tv);
817#endif 1620#endif
818 } 1621 }
819} 1622}
820 1623
821inline_speed int
822ev_timeout_to_ms (ev_tstamp timeout)
823{
824 int ms = timeout * 1000. + .999999;
825
826 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
827}
828
829/*****************************************************************************/ 1624/*****************************************************************************/
830 1625
831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1626#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
832 1627
833/* find a suitable new size for the given array, */ 1628/* find a suitable new size for the given array, */
… …
839 1634
840 do 1635 do
841 ncur <<= 1; 1636 ncur <<= 1;
842 while (cnt > ncur); 1637 while (cnt > ncur);
843 1638
844 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1639 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1640 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
846 { 1641 {
847 ncur *= elem; 1642 ncur *= elem;
848 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
849 ncur = ncur - sizeof (void *) * 4; 1644 ncur = ncur - sizeof (void *) * 4;
… …
851 } 1646 }
852 1647
853 return ncur; 1648 return ncur;
854} 1649}
855 1650
856static noinline void * 1651static void * noinline ecb_cold
857array_realloc (int elem, void *base, int *cur, int cnt) 1652array_realloc (int elem, void *base, int *cur, int cnt)
858{ 1653{
859 *cur = array_nextsize (elem, *cur, cnt); 1654 *cur = array_nextsize (elem, *cur, cnt);
860 return ev_realloc (base, elem * *cur); 1655 return ev_realloc (base, elem * *cur);
861} 1656}
… …
864 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1659 memset ((void *)(base), 0, sizeof (*(base)) * (count))
865 1660
866#define array_needsize(type,base,cur,cnt,init) \ 1661#define array_needsize(type,base,cur,cnt,init) \
867 if (expect_false ((cnt) > (cur))) \ 1662 if (expect_false ((cnt) > (cur))) \
868 { \ 1663 { \
869 int ocur_ = (cur); \ 1664 int ecb_unused ocur_ = (cur); \
870 (base) = (type *)array_realloc \ 1665 (base) = (type *)array_realloc \
871 (sizeof (type), (base), &(cur), (cnt)); \ 1666 (sizeof (type), (base), &(cur), (cnt)); \
872 init ((base) + (ocur_), (cur) - ocur_); \ 1667 init ((base) + (ocur_), (cur) - ocur_); \
873 } 1668 }
874 1669
… …
892pendingcb (EV_P_ ev_prepare *w, int revents) 1687pendingcb (EV_P_ ev_prepare *w, int revents)
893{ 1688{
894} 1689}
895 1690
896void noinline 1691void noinline
897ev_feed_event (EV_P_ void *w, int revents) 1692ev_feed_event (EV_P_ void *w, int revents) EV_THROW
898{ 1693{
899 W w_ = (W)w; 1694 W w_ = (W)w;
900 int pri = ABSPRI (w_); 1695 int pri = ABSPRI (w_);
901 1696
902 if (expect_false (w_->pending)) 1697 if (expect_false (w_->pending))
… …
906 w_->pending = ++pendingcnt [pri]; 1701 w_->pending = ++pendingcnt [pri];
907 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1702 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
908 pendings [pri][w_->pending - 1].w = w_; 1703 pendings [pri][w_->pending - 1].w = w_;
909 pendings [pri][w_->pending - 1].events = revents; 1704 pendings [pri][w_->pending - 1].events = revents;
910 } 1705 }
1706
1707 pendingpri = NUMPRI - 1;
911} 1708}
912 1709
913inline_speed void 1710inline_speed void
914feed_reverse (EV_P_ W w) 1711feed_reverse (EV_P_ W w)
915{ 1712{
… …
961 if (expect_true (!anfd->reify)) 1758 if (expect_true (!anfd->reify))
962 fd_event_nocheck (EV_A_ fd, revents); 1759 fd_event_nocheck (EV_A_ fd, revents);
963} 1760}
964 1761
965void 1762void
966ev_feed_fd_event (EV_P_ int fd, int revents) 1763ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
967{ 1764{
968 if (fd >= 0 && fd < anfdmax) 1765 if (fd >= 0 && fd < anfdmax)
969 fd_event_nocheck (EV_A_ fd, revents); 1766 fd_event_nocheck (EV_A_ fd, revents);
970} 1767}
971 1768
… …
974inline_size void 1771inline_size void
975fd_reify (EV_P) 1772fd_reify (EV_P)
976{ 1773{
977 int i; 1774 int i;
978 1775
1776#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1777 for (i = 0; i < fdchangecnt; ++i)
1778 {
1779 int fd = fdchanges [i];
1780 ANFD *anfd = anfds + fd;
1781
1782 if (anfd->reify & EV__IOFDSET && anfd->head)
1783 {
1784 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1785
1786 if (handle != anfd->handle)
1787 {
1788 unsigned long arg;
1789
1790 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1791
1792 /* handle changed, but fd didn't - we need to do it in two steps */
1793 backend_modify (EV_A_ fd, anfd->events, 0);
1794 anfd->events = 0;
1795 anfd->handle = handle;
1796 }
1797 }
1798 }
1799#endif
1800
979 for (i = 0; i < fdchangecnt; ++i) 1801 for (i = 0; i < fdchangecnt; ++i)
980 { 1802 {
981 int fd = fdchanges [i]; 1803 int fd = fdchanges [i];
982 ANFD *anfd = anfds + fd; 1804 ANFD *anfd = anfds + fd;
983 ev_io *w; 1805 ev_io *w;
… …
985 unsigned char o_events = anfd->events; 1807 unsigned char o_events = anfd->events;
986 unsigned char o_reify = anfd->reify; 1808 unsigned char o_reify = anfd->reify;
987 1809
988 anfd->reify = 0; 1810 anfd->reify = 0;
989 1811
990#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
991 if (o_reify & EV__IOFDSET)
992 {
993 unsigned long arg;
994 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
995 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
996 printf ("oi %d %x\n", fd, anfd->handle);//D
997 }
998#endif
999
1000 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1812 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1001 { 1813 {
1002 anfd->events = 0; 1814 anfd->events = 0;
1003 1815
1004 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1816 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1029 fdchanges [fdchangecnt - 1] = fd; 1841 fdchanges [fdchangecnt - 1] = fd;
1030 } 1842 }
1031} 1843}
1032 1844
1033/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1845/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034inline_speed void 1846inline_speed void ecb_cold
1035fd_kill (EV_P_ int fd) 1847fd_kill (EV_P_ int fd)
1036{ 1848{
1037 ev_io *w; 1849 ev_io *w;
1038 1850
1039 while ((w = (ev_io *)anfds [fd].head)) 1851 while ((w = (ev_io *)anfds [fd].head))
… …
1042 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1854 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1043 } 1855 }
1044} 1856}
1045 1857
1046/* check whether the given fd is actually valid, for error recovery */ 1858/* check whether the given fd is actually valid, for error recovery */
1047inline_size int 1859inline_size int ecb_cold
1048fd_valid (int fd) 1860fd_valid (int fd)
1049{ 1861{
1050#ifdef _WIN32 1862#ifdef _WIN32
1051 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1863 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052#else 1864#else
1053 return fcntl (fd, F_GETFD) != -1; 1865 return fcntl (fd, F_GETFD) != -1;
1054#endif 1866#endif
1055} 1867}
1056 1868
1057/* called on EBADF to verify fds */ 1869/* called on EBADF to verify fds */
1058static void noinline 1870static void noinline ecb_cold
1059fd_ebadf (EV_P) 1871fd_ebadf (EV_P)
1060{ 1872{
1061 int fd; 1873 int fd;
1062 1874
1063 for (fd = 0; fd < anfdmax; ++fd) 1875 for (fd = 0; fd < anfdmax; ++fd)
… …
1065 if (!fd_valid (fd) && errno == EBADF) 1877 if (!fd_valid (fd) && errno == EBADF)
1066 fd_kill (EV_A_ fd); 1878 fd_kill (EV_A_ fd);
1067} 1879}
1068 1880
1069/* called on ENOMEM in select/poll to kill some fds and retry */ 1881/* called on ENOMEM in select/poll to kill some fds and retry */
1070static void noinline 1882static void noinline ecb_cold
1071fd_enomem (EV_P) 1883fd_enomem (EV_P)
1072{ 1884{
1073 int fd; 1885 int fd;
1074 1886
1075 for (fd = anfdmax; fd--; ) 1887 for (fd = anfdmax; fd--; )
… …
1270 2082
1271/*****************************************************************************/ 2083/*****************************************************************************/
1272 2084
1273#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2085#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1274 2086
1275static void noinline 2087static void noinline ecb_cold
1276evpipe_init (EV_P) 2088evpipe_init (EV_P)
1277{ 2089{
1278 if (!ev_is_active (&pipe_w)) 2090 if (!ev_is_active (&pipe_w))
1279 { 2091 {
2092 int fds [2];
2093
1280# if EV_USE_EVENTFD 2094# if EV_USE_EVENTFD
2095 fds [0] = -1;
1281 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2096 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1282 if (evfd < 0 && errno == EINVAL) 2097 if (fds [1] < 0 && errno == EINVAL)
1283 evfd = eventfd (0, 0); 2098 fds [1] = eventfd (0, 0);
1284 2099
1285 if (evfd >= 0) 2100 if (fds [1] < 0)
2101# endif
1286 { 2102 {
2103 while (pipe (fds))
2104 ev_syserr ("(libev) error creating signal/async pipe");
2105
2106 fd_intern (fds [0]);
2107 }
2108
2109 fd_intern (fds [1]);
2110
1287 evpipe [0] = -1; 2111 evpipe [0] = fds [0];
1288 fd_intern (evfd); /* doing it twice doesn't hurt */ 2112
1289 ev_io_set (&pipe_w, evfd, EV_READ); 2113 if (evpipe [1] < 0)
2114 evpipe [1] = fds [1]; /* first call, set write fd */
2115 else
2116 {
2117 /* on subsequent calls, do not change evpipe [1] */
2118 /* so that evpipe_write can always rely on its value. */
2119 /* this branch does not do anything sensible on windows, */
2120 /* so must not be executed on windows */
2121
2122 dup2 (fds [1], evpipe [1]);
2123 close (fds [1]);
2124 }
2125
2126 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2127 ev_io_start (EV_A_ &pipe_w);
2128 ev_unref (EV_A); /* watcher should not keep loop alive */
2129 }
2130}
2131
2132inline_speed void
2133evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2134{
2135 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2136
2137 if (expect_true (*flag))
2138 return;
2139
2140 *flag = 1;
2141 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2142
2143 pipe_write_skipped = 1;
2144
2145 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2146
2147 if (pipe_write_wanted)
2148 {
2149 int old_errno;
2150
2151 pipe_write_skipped = 0;
2152 ECB_MEMORY_FENCE_RELEASE;
2153
2154 old_errno = errno; /* save errno because write will clobber it */
2155
2156#if EV_USE_EVENTFD
2157 if (evpipe [0] < 0)
2158 {
2159 uint64_t counter = 1;
2160 write (evpipe [1], &counter, sizeof (uint64_t));
1290 } 2161 }
1291 else 2162 else
1292# endif 2163#endif
1293 { 2164 {
1294 while (pipe (evpipe)) 2165#ifdef _WIN32
1295 ev_syserr ("(libev) error creating signal/async pipe"); 2166 WSABUF buf;
1296 2167 DWORD sent;
1297 fd_intern (evpipe [0]); 2168 buf.buf = &buf;
1298 fd_intern (evpipe [1]); 2169 buf.len = 1;
1299 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2170 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2171#else
2172 write (evpipe [1], &(evpipe [1]), 1);
2173#endif
1300 } 2174 }
1301
1302 ev_io_start (EV_A_ &pipe_w);
1303 ev_unref (EV_A); /* watcher should not keep loop alive */
1304 }
1305}
1306
1307inline_size void
1308evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1309{
1310 if (!*flag)
1311 {
1312 int old_errno = errno; /* save errno because write might clobber it */
1313 char dummy;
1314
1315 *flag = 1;
1316
1317#if EV_USE_EVENTFD
1318 if (evfd >= 0)
1319 {
1320 uint64_t counter = 1;
1321 write (evfd, &counter, sizeof (uint64_t));
1322 }
1323 else
1324#endif
1325 /* win32 people keep sending patches that change this write() to send() */
1326 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1327 /* so when you think this write should be a send instead, please find out */
1328 /* where your send() is from - it's definitely not the microsoft send, and */
1329 /* tell me. thank you. */
1330 write (evpipe [1], &dummy, 1);
1331 2175
1332 errno = old_errno; 2176 errno = old_errno;
1333 } 2177 }
1334} 2178}
1335 2179
… …
1338static void 2182static void
1339pipecb (EV_P_ ev_io *iow, int revents) 2183pipecb (EV_P_ ev_io *iow, int revents)
1340{ 2184{
1341 int i; 2185 int i;
1342 2186
2187 if (revents & EV_READ)
2188 {
1343#if EV_USE_EVENTFD 2189#if EV_USE_EVENTFD
1344 if (evfd >= 0) 2190 if (evpipe [0] < 0)
1345 { 2191 {
1346 uint64_t counter; 2192 uint64_t counter;
1347 read (evfd, &counter, sizeof (uint64_t)); 2193 read (evpipe [1], &counter, sizeof (uint64_t));
1348 } 2194 }
1349 else 2195 else
1350#endif 2196#endif
1351 { 2197 {
1352 char dummy; 2198 char dummy[4];
1353 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2199#ifdef _WIN32
2200 WSABUF buf;
2201 DWORD recvd;
2202 DWORD flags = 0;
2203 buf.buf = dummy;
2204 buf.len = sizeof (dummy);
2205 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2206#else
1354 read (evpipe [0], &dummy, 1); 2207 read (evpipe [0], &dummy, sizeof (dummy));
2208#endif
2209 }
1355 } 2210 }
2211
2212 pipe_write_skipped = 0;
2213
2214 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1356 2215
1357#if EV_SIGNAL_ENABLE 2216#if EV_SIGNAL_ENABLE
1358 if (sig_pending) 2217 if (sig_pending)
1359 { 2218 {
1360 sig_pending = 0; 2219 sig_pending = 0;
2220
2221 ECB_MEMORY_FENCE;
1361 2222
1362 for (i = EV_NSIG - 1; i--; ) 2223 for (i = EV_NSIG - 1; i--; )
1363 if (expect_false (signals [i].pending)) 2224 if (expect_false (signals [i].pending))
1364 ev_feed_signal_event (EV_A_ i + 1); 2225 ev_feed_signal_event (EV_A_ i + 1);
1365 } 2226 }
… …
1367 2228
1368#if EV_ASYNC_ENABLE 2229#if EV_ASYNC_ENABLE
1369 if (async_pending) 2230 if (async_pending)
1370 { 2231 {
1371 async_pending = 0; 2232 async_pending = 0;
2233
2234 ECB_MEMORY_FENCE;
1372 2235
1373 for (i = asynccnt; i--; ) 2236 for (i = asynccnt; i--; )
1374 if (asyncs [i]->sent) 2237 if (asyncs [i]->sent)
1375 { 2238 {
1376 asyncs [i]->sent = 0; 2239 asyncs [i]->sent = 0;
2240 ECB_MEMORY_FENCE_RELEASE;
1377 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2241 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1378 } 2242 }
1379 } 2243 }
1380#endif 2244#endif
1381} 2245}
1382 2246
1383/*****************************************************************************/ 2247/*****************************************************************************/
1384 2248
1385void 2249void
1386ev_feed_signal (int signum) 2250ev_feed_signal (int signum) EV_THROW
1387{ 2251{
1388#if EV_MULTIPLICITY 2252#if EV_MULTIPLICITY
2253 EV_P;
2254 ECB_MEMORY_FENCE_ACQUIRE;
1389 EV_P = signals [signum - 1].loop; 2255 EV_A = signals [signum - 1].loop;
1390 2256
1391 if (!EV_A) 2257 if (!EV_A)
1392 return; 2258 return;
1393#endif 2259#endif
1394 2260
… …
1405 2271
1406 ev_feed_signal (signum); 2272 ev_feed_signal (signum);
1407} 2273}
1408 2274
1409void noinline 2275void noinline
1410ev_feed_signal_event (EV_P_ int signum) 2276ev_feed_signal_event (EV_P_ int signum) EV_THROW
1411{ 2277{
1412 WL w; 2278 WL w;
1413 2279
1414 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2280 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1415 return; 2281 return;
1416 2282
1417 --signum; 2283 --signum;
1418 2284
1419#if EV_MULTIPLICITY 2285#if EV_MULTIPLICITY
… …
1423 if (expect_false (signals [signum].loop != EV_A)) 2289 if (expect_false (signals [signum].loop != EV_A))
1424 return; 2290 return;
1425#endif 2291#endif
1426 2292
1427 signals [signum].pending = 0; 2293 signals [signum].pending = 0;
2294 ECB_MEMORY_FENCE_RELEASE;
1428 2295
1429 for (w = signals [signum].head; w; w = w->next) 2296 for (w = signals [signum].head; w; w = w->next)
1430 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2297 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1431} 2298}
1432 2299
… …
1530#endif 2397#endif
1531#if EV_USE_SELECT 2398#if EV_USE_SELECT
1532# include "ev_select.c" 2399# include "ev_select.c"
1533#endif 2400#endif
1534 2401
1535int 2402int ecb_cold
1536ev_version_major (void) 2403ev_version_major (void) EV_THROW
1537{ 2404{
1538 return EV_VERSION_MAJOR; 2405 return EV_VERSION_MAJOR;
1539} 2406}
1540 2407
1541int 2408int ecb_cold
1542ev_version_minor (void) 2409ev_version_minor (void) EV_THROW
1543{ 2410{
1544 return EV_VERSION_MINOR; 2411 return EV_VERSION_MINOR;
1545} 2412}
1546 2413
1547/* return true if we are running with elevated privileges and should ignore env variables */ 2414/* return true if we are running with elevated privileges and should ignore env variables */
1548int inline_size 2415int inline_size ecb_cold
1549enable_secure (void) 2416enable_secure (void)
1550{ 2417{
1551#ifdef _WIN32 2418#ifdef _WIN32
1552 return 0; 2419 return 0;
1553#else 2420#else
1554 return getuid () != geteuid () 2421 return getuid () != geteuid ()
1555 || getgid () != getegid (); 2422 || getgid () != getegid ();
1556#endif 2423#endif
1557} 2424}
1558 2425
1559unsigned int 2426unsigned int ecb_cold
1560ev_supported_backends (void) 2427ev_supported_backends (void) EV_THROW
1561{ 2428{
1562 unsigned int flags = 0; 2429 unsigned int flags = 0;
1563 2430
1564 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2431 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1565 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2432 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1568 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2435 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1569 2436
1570 return flags; 2437 return flags;
1571} 2438}
1572 2439
1573unsigned int 2440unsigned int ecb_cold
1574ev_recommended_backends (void) 2441ev_recommended_backends (void) EV_THROW
1575{ 2442{
1576 unsigned int flags = ev_supported_backends (); 2443 unsigned int flags = ev_supported_backends ();
1577 2444
1578#ifndef __NetBSD__ 2445#ifndef __NetBSD__
1579 /* kqueue is borked on everything but netbsd apparently */ 2446 /* kqueue is borked on everything but netbsd apparently */
… …
1590#endif 2457#endif
1591 2458
1592 return flags; 2459 return flags;
1593} 2460}
1594 2461
1595unsigned int 2462unsigned int ecb_cold
1596ev_embeddable_backends (void) 2463ev_embeddable_backends (void) EV_THROW
1597{ 2464{
1598 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2465 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1599 2466
1600 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2467 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1601 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2468 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1603 2470
1604 return flags; 2471 return flags;
1605} 2472}
1606 2473
1607unsigned int 2474unsigned int
1608ev_backend (EV_P) 2475ev_backend (EV_P) EV_THROW
1609{ 2476{
1610 return backend; 2477 return backend;
1611} 2478}
1612 2479
1613#if EV_FEATURE_API 2480#if EV_FEATURE_API
1614unsigned int 2481unsigned int
1615ev_iteration (EV_P) 2482ev_iteration (EV_P) EV_THROW
1616{ 2483{
1617 return loop_count; 2484 return loop_count;
1618} 2485}
1619 2486
1620unsigned int 2487unsigned int
1621ev_depth (EV_P) 2488ev_depth (EV_P) EV_THROW
1622{ 2489{
1623 return loop_depth; 2490 return loop_depth;
1624} 2491}
1625 2492
1626void 2493void
1627ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2494ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1628{ 2495{
1629 io_blocktime = interval; 2496 io_blocktime = interval;
1630} 2497}
1631 2498
1632void 2499void
1633ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2500ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1634{ 2501{
1635 timeout_blocktime = interval; 2502 timeout_blocktime = interval;
1636} 2503}
1637 2504
1638void 2505void
1639ev_set_userdata (EV_P_ void *data) 2506ev_set_userdata (EV_P_ void *data) EV_THROW
1640{ 2507{
1641 userdata = data; 2508 userdata = data;
1642} 2509}
1643 2510
1644void * 2511void *
1645ev_userdata (EV_P) 2512ev_userdata (EV_P) EV_THROW
1646{ 2513{
1647 return userdata; 2514 return userdata;
1648} 2515}
1649 2516
2517void
1650void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2518ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1651{ 2519{
1652 invoke_cb = invoke_pending_cb; 2520 invoke_cb = invoke_pending_cb;
1653} 2521}
1654 2522
2523void
1655void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2524ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1656{ 2525{
1657 release_cb = release; 2526 release_cb = release;
1658 acquire_cb = acquire; 2527 acquire_cb = acquire;
1659} 2528}
1660#endif 2529#endif
1661 2530
1662/* initialise a loop structure, must be zero-initialised */ 2531/* initialise a loop structure, must be zero-initialised */
1663static void noinline 2532static void noinline ecb_cold
1664loop_init (EV_P_ unsigned int flags) 2533loop_init (EV_P_ unsigned int flags) EV_THROW
1665{ 2534{
1666 if (!backend) 2535 if (!backend)
1667 { 2536 {
1668 origflags = flags; 2537 origflags = flags;
1669 2538
… …
1696 if (!(flags & EVFLAG_NOENV) 2565 if (!(flags & EVFLAG_NOENV)
1697 && !enable_secure () 2566 && !enable_secure ()
1698 && getenv ("LIBEV_FLAGS")) 2567 && getenv ("LIBEV_FLAGS"))
1699 flags = atoi (getenv ("LIBEV_FLAGS")); 2568 flags = atoi (getenv ("LIBEV_FLAGS"));
1700 2569
1701 ev_rt_now = ev_time (); 2570 ev_rt_now = ev_time ();
1702 mn_now = get_clock (); 2571 mn_now = get_clock ();
1703 now_floor = mn_now; 2572 now_floor = mn_now;
1704 rtmn_diff = ev_rt_now - mn_now; 2573 rtmn_diff = ev_rt_now - mn_now;
1705#if EV_FEATURE_API 2574#if EV_FEATURE_API
1706 invoke_cb = ev_invoke_pending; 2575 invoke_cb = ev_invoke_pending;
1707#endif 2576#endif
1708 2577
1709 io_blocktime = 0.; 2578 io_blocktime = 0.;
1710 timeout_blocktime = 0.; 2579 timeout_blocktime = 0.;
1711 backend = 0; 2580 backend = 0;
1712 backend_fd = -1; 2581 backend_fd = -1;
1713 sig_pending = 0; 2582 sig_pending = 0;
1714#if EV_ASYNC_ENABLE 2583#if EV_ASYNC_ENABLE
1715 async_pending = 0; 2584 async_pending = 0;
1716#endif 2585#endif
2586 pipe_write_skipped = 0;
2587 pipe_write_wanted = 0;
2588 evpipe [0] = -1;
2589 evpipe [1] = -1;
1717#if EV_USE_INOTIFY 2590#if EV_USE_INOTIFY
1718 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2591 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719#endif 2592#endif
1720#if EV_USE_SIGNALFD 2593#if EV_USE_SIGNALFD
1721 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2594 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722#endif 2595#endif
1723 2596
1724 if (!(flags & EVBACKEND_MASK)) 2597 if (!(flags & EVBACKEND_MASK))
1725 flags |= ev_recommended_backends (); 2598 flags |= ev_recommended_backends ();
1726 2599
… …
1751#endif 2624#endif
1752 } 2625 }
1753} 2626}
1754 2627
1755/* free up a loop structure */ 2628/* free up a loop structure */
1756void 2629void ecb_cold
1757ev_loop_destroy (EV_P) 2630ev_loop_destroy (EV_P)
1758{ 2631{
1759 int i; 2632 int i;
1760 2633
1761#if EV_MULTIPLICITY 2634#if EV_MULTIPLICITY
… …
1772 EV_INVOKE_PENDING; 2645 EV_INVOKE_PENDING;
1773 } 2646 }
1774#endif 2647#endif
1775 2648
1776#if EV_CHILD_ENABLE 2649#if EV_CHILD_ENABLE
1777 if (ev_is_active (&childev)) 2650 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1778 { 2651 {
1779 ev_ref (EV_A); /* child watcher */ 2652 ev_ref (EV_A); /* child watcher */
1780 ev_signal_stop (EV_A_ &childev); 2653 ev_signal_stop (EV_A_ &childev);
1781 } 2654 }
1782#endif 2655#endif
… …
1784 if (ev_is_active (&pipe_w)) 2657 if (ev_is_active (&pipe_w))
1785 { 2658 {
1786 /*ev_ref (EV_A);*/ 2659 /*ev_ref (EV_A);*/
1787 /*ev_io_stop (EV_A_ &pipe_w);*/ 2660 /*ev_io_stop (EV_A_ &pipe_w);*/
1788 2661
1789#if EV_USE_EVENTFD
1790 if (evfd >= 0)
1791 close (evfd);
1792#endif
1793
1794 if (evpipe [0] >= 0)
1795 {
1796 EV_WIN32_CLOSE_FD (evpipe [0]); 2662 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1797 EV_WIN32_CLOSE_FD (evpipe [1]); 2663 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1798 }
1799 } 2664 }
1800 2665
1801#if EV_USE_SIGNALFD 2666#if EV_USE_SIGNALFD
1802 if (ev_is_active (&sigfd_w)) 2667 if (ev_is_active (&sigfd_w))
1803 close (sigfd); 2668 close (sigfd);
… …
1889#endif 2754#endif
1890#if EV_USE_INOTIFY 2755#if EV_USE_INOTIFY
1891 infy_fork (EV_A); 2756 infy_fork (EV_A);
1892#endif 2757#endif
1893 2758
2759#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1894 if (ev_is_active (&pipe_w)) 2760 if (ev_is_active (&pipe_w))
1895 { 2761 {
1896 /* this "locks" the handlers against writing to the pipe */ 2762 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1897 /* while we modify the fd vars */
1898 sig_pending = 1;
1899#if EV_ASYNC_ENABLE
1900 async_pending = 1;
1901#endif
1902 2763
1903 ev_ref (EV_A); 2764 ev_ref (EV_A);
1904 ev_io_stop (EV_A_ &pipe_w); 2765 ev_io_stop (EV_A_ &pipe_w);
1905 2766
1906#if EV_USE_EVENTFD
1907 if (evfd >= 0)
1908 close (evfd);
1909#endif
1910
1911 if (evpipe [0] >= 0) 2767 if (evpipe [0] >= 0)
1912 {
1913 EV_WIN32_CLOSE_FD (evpipe [0]); 2768 EV_WIN32_CLOSE_FD (evpipe [0]);
1914 EV_WIN32_CLOSE_FD (evpipe [1]);
1915 }
1916 2769
1917#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1918 evpipe_init (EV_A); 2770 evpipe_init (EV_A);
1919 /* now iterate over everything, in case we missed something */ 2771 /* iterate over everything, in case we missed something before */
1920 pipecb (EV_A_ &pipe_w, EV_READ); 2772 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1921#endif
1922 } 2773 }
2774#endif
1923 2775
1924 postfork = 0; 2776 postfork = 0;
1925} 2777}
1926 2778
1927#if EV_MULTIPLICITY 2779#if EV_MULTIPLICITY
1928 2780
1929struct ev_loop * 2781struct ev_loop * ecb_cold
1930ev_loop_new (unsigned int flags) 2782ev_loop_new (unsigned int flags) EV_THROW
1931{ 2783{
1932 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2784 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933 2785
1934 memset (EV_A, 0, sizeof (struct ev_loop)); 2786 memset (EV_A, 0, sizeof (struct ev_loop));
1935 loop_init (EV_A_ flags); 2787 loop_init (EV_A_ flags);
… …
1942} 2794}
1943 2795
1944#endif /* multiplicity */ 2796#endif /* multiplicity */
1945 2797
1946#if EV_VERIFY 2798#if EV_VERIFY
1947static void noinline 2799static void noinline ecb_cold
1948verify_watcher (EV_P_ W w) 2800verify_watcher (EV_P_ W w)
1949{ 2801{
1950 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2802 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951 2803
1952 if (w->pending) 2804 if (w->pending)
1953 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2805 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954} 2806}
1955 2807
1956static void noinline 2808static void noinline ecb_cold
1957verify_heap (EV_P_ ANHE *heap, int N) 2809verify_heap (EV_P_ ANHE *heap, int N)
1958{ 2810{
1959 int i; 2811 int i;
1960 2812
1961 for (i = HEAP0; i < N + HEAP0; ++i) 2813 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1966 2818
1967 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2819 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968 } 2820 }
1969} 2821}
1970 2822
1971static void noinline 2823static void noinline ecb_cold
1972array_verify (EV_P_ W *ws, int cnt) 2824array_verify (EV_P_ W *ws, int cnt)
1973{ 2825{
1974 while (cnt--) 2826 while (cnt--)
1975 { 2827 {
1976 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2828 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1978 } 2830 }
1979} 2831}
1980#endif 2832#endif
1981 2833
1982#if EV_FEATURE_API 2834#if EV_FEATURE_API
1983void 2835void ecb_cold
1984ev_verify (EV_P) 2836ev_verify (EV_P) EV_THROW
1985{ 2837{
1986#if EV_VERIFY 2838#if EV_VERIFY
1987 int i; 2839 int i;
1988 WL w; 2840 WL w, w2;
1989 2841
1990 assert (activecnt >= -1); 2842 assert (activecnt >= -1);
1991 2843
1992 assert (fdchangemax >= fdchangecnt); 2844 assert (fdchangemax >= fdchangecnt);
1993 for (i = 0; i < fdchangecnt; ++i) 2845 for (i = 0; i < fdchangecnt; ++i)
1994 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2846 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1995 2847
1996 assert (anfdmax >= 0); 2848 assert (anfdmax >= 0);
1997 for (i = 0; i < anfdmax; ++i) 2849 for (i = 0; i < anfdmax; ++i)
2850 {
2851 int j = 0;
2852
1998 for (w = anfds [i].head; w; w = w->next) 2853 for (w = w2 = anfds [i].head; w; w = w->next)
1999 { 2854 {
2000 verify_watcher (EV_A_ (W)w); 2855 verify_watcher (EV_A_ (W)w);
2856
2857 if (j++ & 1)
2858 {
2859 assert (("libev: io watcher list contains a loop", w != w2));
2860 w2 = w2->next;
2861 }
2862
2001 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2863 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2002 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2864 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2003 } 2865 }
2866 }
2004 2867
2005 assert (timermax >= timercnt); 2868 assert (timermax >= timercnt);
2006 verify_heap (EV_A_ timers, timercnt); 2869 verify_heap (EV_A_ timers, timercnt);
2007 2870
2008#if EV_PERIODIC_ENABLE 2871#if EV_PERIODIC_ENABLE
… …
2054#endif 2917#endif
2055} 2918}
2056#endif 2919#endif
2057 2920
2058#if EV_MULTIPLICITY 2921#if EV_MULTIPLICITY
2059struct ev_loop * 2922struct ev_loop * ecb_cold
2060#else 2923#else
2061int 2924int
2062#endif 2925#endif
2063ev_default_loop (unsigned int flags) 2926ev_default_loop (unsigned int flags) EV_THROW
2064{ 2927{
2065 if (!ev_default_loop_ptr) 2928 if (!ev_default_loop_ptr)
2066 { 2929 {
2067#if EV_MULTIPLICITY 2930#if EV_MULTIPLICITY
2068 EV_P = ev_default_loop_ptr = &default_loop_struct; 2931 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2087 2950
2088 return ev_default_loop_ptr; 2951 return ev_default_loop_ptr;
2089} 2952}
2090 2953
2091void 2954void
2092ev_loop_fork (EV_P) 2955ev_loop_fork (EV_P) EV_THROW
2093{ 2956{
2094 postfork = 1; /* must be in line with ev_default_fork */ 2957 postfork = 1;
2095} 2958}
2096 2959
2097/*****************************************************************************/ 2960/*****************************************************************************/
2098 2961
2099void 2962void
… …
2101{ 2964{
2102 EV_CB_INVOKE ((W)w, revents); 2965 EV_CB_INVOKE ((W)w, revents);
2103} 2966}
2104 2967
2105unsigned int 2968unsigned int
2106ev_pending_count (EV_P) 2969ev_pending_count (EV_P) EV_THROW
2107{ 2970{
2108 int pri; 2971 int pri;
2109 unsigned int count = 0; 2972 unsigned int count = 0;
2110 2973
2111 for (pri = NUMPRI; pri--; ) 2974 for (pri = NUMPRI; pri--; )
… …
2115} 2978}
2116 2979
2117void noinline 2980void noinline
2118ev_invoke_pending (EV_P) 2981ev_invoke_pending (EV_P)
2119{ 2982{
2120 int pri; 2983 pendingpri = NUMPRI;
2121 2984
2122 for (pri = NUMPRI; pri--; ) 2985 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2986 {
2987 --pendingpri;
2988
2123 while (pendingcnt [pri]) 2989 while (pendingcnt [pendingpri])
2124 { 2990 {
2125 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2991 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2126 2992
2127 p->w->pending = 0; 2993 p->w->pending = 0;
2128 EV_CB_INVOKE (p->w, p->events); 2994 EV_CB_INVOKE (p->w, p->events);
2129 EV_FREQUENT_CHECK; 2995 EV_FREQUENT_CHECK;
2130 } 2996 }
2997 }
2131} 2998}
2132 2999
2133#if EV_IDLE_ENABLE 3000#if EV_IDLE_ENABLE
2134/* make idle watchers pending. this handles the "call-idle */ 3001/* make idle watchers pending. this handles the "call-idle */
2135/* only when higher priorities are idle" logic */ 3002/* only when higher priorities are idle" logic */
… …
2193 } 3060 }
2194} 3061}
2195 3062
2196#if EV_PERIODIC_ENABLE 3063#if EV_PERIODIC_ENABLE
2197 3064
2198inline_speed 3065static void noinline
2199periodic_recalc (EV_P_ ev_periodic *w) 3066periodic_recalc (EV_P_ ev_periodic *w)
2200{ 3067{
2201 /* TODO: use slow but potentially more correct incremental algo, */ 3068 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202 /* also do not rely on ceil */ 3069 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2203 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3070
3071 /* the above almost always errs on the low side */
3072 while (at <= ev_rt_now)
3073 {
3074 ev_tstamp nat = at + w->interval;
3075
3076 /* when resolution fails us, we use ev_rt_now */
3077 if (expect_false (nat == at))
3078 {
3079 at = ev_rt_now;
3080 break;
3081 }
3082
3083 at = nat;
3084 }
3085
3086 ev_at (w) = at;
2204} 3087}
2205 3088
2206/* make periodics pending */ 3089/* make periodics pending */
2207inline_size void 3090inline_size void
2208periodics_reify (EV_P) 3091periodics_reify (EV_P)
2209{ 3092{
2210 EV_FREQUENT_CHECK; 3093 EV_FREQUENT_CHECK;
2211 3094
2212 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3095 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2213 { 3096 {
2214 int feed_count = 0;
2215
2216 do 3097 do
2217 { 3098 {
2218 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3099 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2219 3100
2220 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3101 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2230 downheap (periodics, periodiccnt, HEAP0); 3111 downheap (periodics, periodiccnt, HEAP0);
2231 } 3112 }
2232 else if (w->interval) 3113 else if (w->interval)
2233 { 3114 {
2234 periodic_recalc (EV_A_ w); 3115 periodic_recalc (EV_A_ w);
2235
2236 /* if next trigger time is not sufficiently in the future, put it there */
2237 /* this might happen because of floating point inexactness */
2238 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2239 {
2240 ev_at (w) += w->interval;
2241
2242 /* if interval is unreasonably low we might still have a time in the past */
2243 /* so correct this. this will make the periodic very inexact, but the user */
2244 /* has effectively asked to get triggered more often than possible */
2245 if (ev_at (w) < ev_rt_now)
2246 ev_at (w) = ev_rt_now;
2247 }
2248
2249 ANHE_at_cache (periodics [HEAP0]); 3116 ANHE_at_cache (periodics [HEAP0]);
2250 downheap (periodics, periodiccnt, HEAP0); 3117 downheap (periodics, periodiccnt, HEAP0);
2251 } 3118 }
2252 else 3119 else
2253 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3120 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2261 } 3128 }
2262} 3129}
2263 3130
2264/* simply recalculate all periodics */ 3131/* simply recalculate all periodics */
2265/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3132/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266static void noinline 3133static void noinline ecb_cold
2267periodics_reschedule (EV_P) 3134periodics_reschedule (EV_P)
2268{ 3135{
2269 int i; 3136 int i;
2270 3137
2271 /* adjust periodics after time jump */ 3138 /* adjust periodics after time jump */
… …
2284 reheap (periodics, periodiccnt); 3151 reheap (periodics, periodiccnt);
2285} 3152}
2286#endif 3153#endif
2287 3154
2288/* adjust all timers by a given offset */ 3155/* adjust all timers by a given offset */
2289static void noinline 3156static void noinline ecb_cold
2290timers_reschedule (EV_P_ ev_tstamp adjust) 3157timers_reschedule (EV_P_ ev_tstamp adjust)
2291{ 3158{
2292 int i; 3159 int i;
2293 3160
2294 for (i = 0; i < timercnt; ++i) 3161 for (i = 0; i < timercnt; ++i)
… …
2331 * doesn't hurt either as we only do this on time-jumps or 3198 * doesn't hurt either as we only do this on time-jumps or
2332 * in the unlikely event of having been preempted here. 3199 * in the unlikely event of having been preempted here.
2333 */ 3200 */
2334 for (i = 4; --i; ) 3201 for (i = 4; --i; )
2335 { 3202 {
3203 ev_tstamp diff;
2336 rtmn_diff = ev_rt_now - mn_now; 3204 rtmn_diff = ev_rt_now - mn_now;
2337 3205
3206 diff = odiff - rtmn_diff;
3207
2338 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3208 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2339 return; /* all is well */ 3209 return; /* all is well */
2340 3210
2341 ev_rt_now = ev_time (); 3211 ev_rt_now = ev_time ();
2342 mn_now = get_clock (); 3212 mn_now = get_clock ();
2343 now_floor = mn_now; 3213 now_floor = mn_now;
… …
2365 3235
2366 mn_now = ev_rt_now; 3236 mn_now = ev_rt_now;
2367 } 3237 }
2368} 3238}
2369 3239
2370void 3240int
2371ev_run (EV_P_ int flags) 3241ev_run (EV_P_ int flags)
2372{ 3242{
2373#if EV_FEATURE_API 3243#if EV_FEATURE_API
2374 ++loop_depth; 3244 ++loop_depth;
2375#endif 3245#endif
… …
2433 ev_tstamp prev_mn_now = mn_now; 3303 ev_tstamp prev_mn_now = mn_now;
2434 3304
2435 /* update time to cancel out callback processing overhead */ 3305 /* update time to cancel out callback processing overhead */
2436 time_update (EV_A_ 1e100); 3306 time_update (EV_A_ 1e100);
2437 3307
3308 /* from now on, we want a pipe-wake-up */
3309 pipe_write_wanted = 1;
3310
3311 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3312
2438 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3313 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2439 { 3314 {
2440 waittime = MAX_BLOCKTIME; 3315 waittime = MAX_BLOCKTIME;
2441 3316
2442 if (timercnt) 3317 if (timercnt)
2443 { 3318 {
2444 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3319 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445 if (waittime > to) waittime = to; 3320 if (waittime > to) waittime = to;
2446 } 3321 }
2447 3322
2448#if EV_PERIODIC_ENABLE 3323#if EV_PERIODIC_ENABLE
2449 if (periodiccnt) 3324 if (periodiccnt)
2450 { 3325 {
2451 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3326 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452 if (waittime > to) waittime = to; 3327 if (waittime > to) waittime = to;
2453 } 3328 }
2454#endif 3329#endif
2455 3330
2456 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3331 /* don't let timeouts decrease the waittime below timeout_blocktime */
2457 if (expect_false (waittime < timeout_blocktime)) 3332 if (expect_false (waittime < timeout_blocktime))
2458 waittime = timeout_blocktime; 3333 waittime = timeout_blocktime;
3334
3335 /* at this point, we NEED to wait, so we have to ensure */
3336 /* to pass a minimum nonzero value to the backend */
3337 if (expect_false (waittime < backend_mintime))
3338 waittime = backend_mintime;
2459 3339
2460 /* extra check because io_blocktime is commonly 0 */ 3340 /* extra check because io_blocktime is commonly 0 */
2461 if (expect_false (io_blocktime)) 3341 if (expect_false (io_blocktime))
2462 { 3342 {
2463 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3343 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464 3344
2465 if (sleeptime > waittime - backend_fudge) 3345 if (sleeptime > waittime - backend_mintime)
2466 sleeptime = waittime - backend_fudge; 3346 sleeptime = waittime - backend_mintime;
2467 3347
2468 if (expect_true (sleeptime > 0.)) 3348 if (expect_true (sleeptime > 0.))
2469 { 3349 {
2470 ev_sleep (sleeptime); 3350 ev_sleep (sleeptime);
2471 waittime -= sleeptime; 3351 waittime -= sleeptime;
… …
2478#endif 3358#endif
2479 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3359 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480 backend_poll (EV_A_ waittime); 3360 backend_poll (EV_A_ waittime);
2481 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3361 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2482 3362
3363 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3364
3365 ECB_MEMORY_FENCE_ACQUIRE;
3366 if (pipe_write_skipped)
3367 {
3368 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3369 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3370 }
3371
3372
2483 /* update ev_rt_now, do magic */ 3373 /* update ev_rt_now, do magic */
2484 time_update (EV_A_ waittime + sleeptime); 3374 time_update (EV_A_ waittime + sleeptime);
2485 } 3375 }
2486 3376
2487 /* queue pending timers and reschedule them */ 3377 /* queue pending timers and reschedule them */
… …
2513 loop_done = EVBREAK_CANCEL; 3403 loop_done = EVBREAK_CANCEL;
2514 3404
2515#if EV_FEATURE_API 3405#if EV_FEATURE_API
2516 --loop_depth; 3406 --loop_depth;
2517#endif 3407#endif
3408
3409 return activecnt;
2518} 3410}
2519 3411
2520void 3412void
2521ev_break (EV_P_ int how) 3413ev_break (EV_P_ int how) EV_THROW
2522{ 3414{
2523 loop_done = how; 3415 loop_done = how;
2524} 3416}
2525 3417
2526void 3418void
2527ev_ref (EV_P) 3419ev_ref (EV_P) EV_THROW
2528{ 3420{
2529 ++activecnt; 3421 ++activecnt;
2530} 3422}
2531 3423
2532void 3424void
2533ev_unref (EV_P) 3425ev_unref (EV_P) EV_THROW
2534{ 3426{
2535 --activecnt; 3427 --activecnt;
2536} 3428}
2537 3429
2538void 3430void
2539ev_now_update (EV_P) 3431ev_now_update (EV_P) EV_THROW
2540{ 3432{
2541 time_update (EV_A_ 1e100); 3433 time_update (EV_A_ 1e100);
2542} 3434}
2543 3435
2544void 3436void
2545ev_suspend (EV_P) 3437ev_suspend (EV_P) EV_THROW
2546{ 3438{
2547 ev_now_update (EV_A); 3439 ev_now_update (EV_A);
2548} 3440}
2549 3441
2550void 3442void
2551ev_resume (EV_P) 3443ev_resume (EV_P) EV_THROW
2552{ 3444{
2553 ev_tstamp mn_prev = mn_now; 3445 ev_tstamp mn_prev = mn_now;
2554 3446
2555 ev_now_update (EV_A); 3447 ev_now_update (EV_A);
2556 timers_reschedule (EV_A_ mn_now - mn_prev); 3448 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2595 w->pending = 0; 3487 w->pending = 0;
2596 } 3488 }
2597} 3489}
2598 3490
2599int 3491int
2600ev_clear_pending (EV_P_ void *w) 3492ev_clear_pending (EV_P_ void *w) EV_THROW
2601{ 3493{
2602 W w_ = (W)w; 3494 W w_ = (W)w;
2603 int pending = w_->pending; 3495 int pending = w_->pending;
2604 3496
2605 if (expect_true (pending)) 3497 if (expect_true (pending))
… …
2638} 3530}
2639 3531
2640/*****************************************************************************/ 3532/*****************************************************************************/
2641 3533
2642void noinline 3534void noinline
2643ev_io_start (EV_P_ ev_io *w) 3535ev_io_start (EV_P_ ev_io *w) EV_THROW
2644{ 3536{
2645 int fd = w->fd; 3537 int fd = w->fd;
2646 3538
2647 if (expect_false (ev_is_active (w))) 3539 if (expect_false (ev_is_active (w)))
2648 return; 3540 return;
… …
2654 3546
2655 ev_start (EV_A_ (W)w, 1); 3547 ev_start (EV_A_ (W)w, 1);
2656 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3548 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2657 wlist_add (&anfds[fd].head, (WL)w); 3549 wlist_add (&anfds[fd].head, (WL)w);
2658 3550
3551 /* common bug, apparently */
3552 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3553
2659 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3554 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2660 w->events &= ~EV__IOFDSET; 3555 w->events &= ~EV__IOFDSET;
2661 3556
2662 EV_FREQUENT_CHECK; 3557 EV_FREQUENT_CHECK;
2663} 3558}
2664 3559
2665void noinline 3560void noinline
2666ev_io_stop (EV_P_ ev_io *w) 3561ev_io_stop (EV_P_ ev_io *w) EV_THROW
2667{ 3562{
2668 clear_pending (EV_A_ (W)w); 3563 clear_pending (EV_A_ (W)w);
2669 if (expect_false (!ev_is_active (w))) 3564 if (expect_false (!ev_is_active (w)))
2670 return; 3565 return;
2671 3566
… …
2680 3575
2681 EV_FREQUENT_CHECK; 3576 EV_FREQUENT_CHECK;
2682} 3577}
2683 3578
2684void noinline 3579void noinline
2685ev_timer_start (EV_P_ ev_timer *w) 3580ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2686{ 3581{
2687 if (expect_false (ev_is_active (w))) 3582 if (expect_false (ev_is_active (w)))
2688 return; 3583 return;
2689 3584
2690 ev_at (w) += mn_now; 3585 ev_at (w) += mn_now;
… …
2704 3599
2705 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3600 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2706} 3601}
2707 3602
2708void noinline 3603void noinline
2709ev_timer_stop (EV_P_ ev_timer *w) 3604ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2710{ 3605{
2711 clear_pending (EV_A_ (W)w); 3606 clear_pending (EV_A_ (W)w);
2712 if (expect_false (!ev_is_active (w))) 3607 if (expect_false (!ev_is_active (w)))
2713 return; 3608 return;
2714 3609
… …
2734 3629
2735 EV_FREQUENT_CHECK; 3630 EV_FREQUENT_CHECK;
2736} 3631}
2737 3632
2738void noinline 3633void noinline
2739ev_timer_again (EV_P_ ev_timer *w) 3634ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2740{ 3635{
2741 EV_FREQUENT_CHECK; 3636 EV_FREQUENT_CHECK;
3637
3638 clear_pending (EV_A_ (W)w);
2742 3639
2743 if (ev_is_active (w)) 3640 if (ev_is_active (w))
2744 { 3641 {
2745 if (w->repeat) 3642 if (w->repeat)
2746 { 3643 {
… …
2759 3656
2760 EV_FREQUENT_CHECK; 3657 EV_FREQUENT_CHECK;
2761} 3658}
2762 3659
2763ev_tstamp 3660ev_tstamp
2764ev_timer_remaining (EV_P_ ev_timer *w) 3661ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2765{ 3662{
2766 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3663 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2767} 3664}
2768 3665
2769#if EV_PERIODIC_ENABLE 3666#if EV_PERIODIC_ENABLE
2770void noinline 3667void noinline
2771ev_periodic_start (EV_P_ ev_periodic *w) 3668ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2772{ 3669{
2773 if (expect_false (ev_is_active (w))) 3670 if (expect_false (ev_is_active (w)))
2774 return; 3671 return;
2775 3672
2776 if (w->reschedule_cb) 3673 if (w->reschedule_cb)
… …
2796 3693
2797 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3694 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2798} 3695}
2799 3696
2800void noinline 3697void noinline
2801ev_periodic_stop (EV_P_ ev_periodic *w) 3698ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2802{ 3699{
2803 clear_pending (EV_A_ (W)w); 3700 clear_pending (EV_A_ (W)w);
2804 if (expect_false (!ev_is_active (w))) 3701 if (expect_false (!ev_is_active (w)))
2805 return; 3702 return;
2806 3703
… …
2824 3721
2825 EV_FREQUENT_CHECK; 3722 EV_FREQUENT_CHECK;
2826} 3723}
2827 3724
2828void noinline 3725void noinline
2829ev_periodic_again (EV_P_ ev_periodic *w) 3726ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2830{ 3727{
2831 /* TODO: use adjustheap and recalculation */ 3728 /* TODO: use adjustheap and recalculation */
2832 ev_periodic_stop (EV_A_ w); 3729 ev_periodic_stop (EV_A_ w);
2833 ev_periodic_start (EV_A_ w); 3730 ev_periodic_start (EV_A_ w);
2834} 3731}
… …
2839#endif 3736#endif
2840 3737
2841#if EV_SIGNAL_ENABLE 3738#if EV_SIGNAL_ENABLE
2842 3739
2843void noinline 3740void noinline
2844ev_signal_start (EV_P_ ev_signal *w) 3741ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2845{ 3742{
2846 if (expect_false (ev_is_active (w))) 3743 if (expect_false (ev_is_active (w)))
2847 return; 3744 return;
2848 3745
2849 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3746 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2851#if EV_MULTIPLICITY 3748#if EV_MULTIPLICITY
2852 assert (("libev: a signal must not be attached to two different loops", 3749 assert (("libev: a signal must not be attached to two different loops",
2853 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3750 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2854 3751
2855 signals [w->signum - 1].loop = EV_A; 3752 signals [w->signum - 1].loop = EV_A;
3753 ECB_MEMORY_FENCE_RELEASE;
2856#endif 3754#endif
2857 3755
2858 EV_FREQUENT_CHECK; 3756 EV_FREQUENT_CHECK;
2859 3757
2860#if EV_USE_SIGNALFD 3758#if EV_USE_SIGNALFD
… …
2920 3818
2921 EV_FREQUENT_CHECK; 3819 EV_FREQUENT_CHECK;
2922} 3820}
2923 3821
2924void noinline 3822void noinline
2925ev_signal_stop (EV_P_ ev_signal *w) 3823ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2926{ 3824{
2927 clear_pending (EV_A_ (W)w); 3825 clear_pending (EV_A_ (W)w);
2928 if (expect_false (!ev_is_active (w))) 3826 if (expect_false (!ev_is_active (w)))
2929 return; 3827 return;
2930 3828
… …
2961#endif 3859#endif
2962 3860
2963#if EV_CHILD_ENABLE 3861#if EV_CHILD_ENABLE
2964 3862
2965void 3863void
2966ev_child_start (EV_P_ ev_child *w) 3864ev_child_start (EV_P_ ev_child *w) EV_THROW
2967{ 3865{
2968#if EV_MULTIPLICITY 3866#if EV_MULTIPLICITY
2969 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3867 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2970#endif 3868#endif
2971 if (expect_false (ev_is_active (w))) 3869 if (expect_false (ev_is_active (w)))
… …
2978 3876
2979 EV_FREQUENT_CHECK; 3877 EV_FREQUENT_CHECK;
2980} 3878}
2981 3879
2982void 3880void
2983ev_child_stop (EV_P_ ev_child *w) 3881ev_child_stop (EV_P_ ev_child *w) EV_THROW
2984{ 3882{
2985 clear_pending (EV_A_ (W)w); 3883 clear_pending (EV_A_ (W)w);
2986 if (expect_false (!ev_is_active (w))) 3884 if (expect_false (!ev_is_active (w)))
2987 return; 3885 return;
2988 3886
… …
3015# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3913# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3016 3914
3017static void noinline 3915static void noinline
3018infy_add (EV_P_ ev_stat *w) 3916infy_add (EV_P_ ev_stat *w)
3019{ 3917{
3020 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 3918 w->wd = inotify_add_watch (fs_fd, w->path,
3919 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3920 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3921 | IN_DONT_FOLLOW | IN_MASK_ADD);
3021 3922
3022 if (w->wd >= 0) 3923 if (w->wd >= 0)
3023 { 3924 {
3024 struct statfs sfs; 3925 struct statfs sfs;
3025 3926
… …
3029 3930
3030 if (!fs_2625) 3931 if (!fs_2625)
3031 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3932 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3032 else if (!statfs (w->path, &sfs) 3933 else if (!statfs (w->path, &sfs)
3033 && (sfs.f_type == 0x1373 /* devfs */ 3934 && (sfs.f_type == 0x1373 /* devfs */
3935 || sfs.f_type == 0x4006 /* fat */
3936 || sfs.f_type == 0x4d44 /* msdos */
3034 || sfs.f_type == 0xEF53 /* ext2/3 */ 3937 || sfs.f_type == 0xEF53 /* ext2/3 */
3938 || sfs.f_type == 0x72b6 /* jffs2 */
3939 || sfs.f_type == 0x858458f6 /* ramfs */
3940 || sfs.f_type == 0x5346544e /* ntfs */
3035 || sfs.f_type == 0x3153464a /* jfs */ 3941 || sfs.f_type == 0x3153464a /* jfs */
3942 || sfs.f_type == 0x9123683e /* btrfs */
3036 || sfs.f_type == 0x52654973 /* reiser3 */ 3943 || sfs.f_type == 0x52654973 /* reiser3 */
3037 || sfs.f_type == 0x01021994 /* tempfs */ 3944 || sfs.f_type == 0x01021994 /* tmpfs */
3038 || sfs.f_type == 0x58465342 /* xfs */)) 3945 || sfs.f_type == 0x58465342 /* xfs */))
3039 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3946 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3040 else 3947 else
3041 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3948 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3042 } 3949 }
… …
3063 if (!pend || pend == path) 3970 if (!pend || pend == path)
3064 break; 3971 break;
3065 3972
3066 *pend = 0; 3973 *pend = 0;
3067 w->wd = inotify_add_watch (fs_fd, path, mask); 3974 w->wd = inotify_add_watch (fs_fd, path, mask);
3068 } 3975 }
3069 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3976 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3070 } 3977 }
3071 } 3978 }
3072 3979
3073 if (w->wd >= 0) 3980 if (w->wd >= 0)
… …
3140 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4047 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141 ofs += sizeof (struct inotify_event) + ev->len; 4048 ofs += sizeof (struct inotify_event) + ev->len;
3142 } 4049 }
3143} 4050}
3144 4051
3145inline_size void 4052inline_size void ecb_cold
3146ev_check_2625 (EV_P) 4053ev_check_2625 (EV_P)
3147{ 4054{
3148 /* kernels < 2.6.25 are borked 4055 /* kernels < 2.6.25 are borked
3149 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4056 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150 */ 4057 */
… …
3155} 4062}
3156 4063
3157inline_size int 4064inline_size int
3158infy_newfd (void) 4065infy_newfd (void)
3159{ 4066{
3160#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4067#if defined IN_CLOEXEC && defined IN_NONBLOCK
3161 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4068 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3162 if (fd >= 0) 4069 if (fd >= 0)
3163 return fd; 4070 return fd;
3164#endif 4071#endif
3165 return inotify_init (); 4072 return inotify_init ();
… …
3240#else 4147#else
3241# define EV_LSTAT(p,b) lstat (p, b) 4148# define EV_LSTAT(p,b) lstat (p, b)
3242#endif 4149#endif
3243 4150
3244void 4151void
3245ev_stat_stat (EV_P_ ev_stat *w) 4152ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3246{ 4153{
3247 if (lstat (w->path, &w->attr) < 0) 4154 if (lstat (w->path, &w->attr) < 0)
3248 w->attr.st_nlink = 0; 4155 w->attr.st_nlink = 0;
3249 else if (!w->attr.st_nlink) 4156 else if (!w->attr.st_nlink)
3250 w->attr.st_nlink = 1; 4157 w->attr.st_nlink = 1;
… …
3289 ev_feed_event (EV_A_ w, EV_STAT); 4196 ev_feed_event (EV_A_ w, EV_STAT);
3290 } 4197 }
3291} 4198}
3292 4199
3293void 4200void
3294ev_stat_start (EV_P_ ev_stat *w) 4201ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3295{ 4202{
3296 if (expect_false (ev_is_active (w))) 4203 if (expect_false (ev_is_active (w)))
3297 return; 4204 return;
3298 4205
3299 ev_stat_stat (EV_A_ w); 4206 ev_stat_stat (EV_A_ w);
… …
3320 4227
3321 EV_FREQUENT_CHECK; 4228 EV_FREQUENT_CHECK;
3322} 4229}
3323 4230
3324void 4231void
3325ev_stat_stop (EV_P_ ev_stat *w) 4232ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3326{ 4233{
3327 clear_pending (EV_A_ (W)w); 4234 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w))) 4235 if (expect_false (!ev_is_active (w)))
3329 return; 4236 return;
3330 4237
… …
3346} 4253}
3347#endif 4254#endif
3348 4255
3349#if EV_IDLE_ENABLE 4256#if EV_IDLE_ENABLE
3350void 4257void
3351ev_idle_start (EV_P_ ev_idle *w) 4258ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3352{ 4259{
3353 if (expect_false (ev_is_active (w))) 4260 if (expect_false (ev_is_active (w)))
3354 return; 4261 return;
3355 4262
3356 pri_adjust (EV_A_ (W)w); 4263 pri_adjust (EV_A_ (W)w);
… …
3369 4276
3370 EV_FREQUENT_CHECK; 4277 EV_FREQUENT_CHECK;
3371} 4278}
3372 4279
3373void 4280void
3374ev_idle_stop (EV_P_ ev_idle *w) 4281ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3375{ 4282{
3376 clear_pending (EV_A_ (W)w); 4283 clear_pending (EV_A_ (W)w);
3377 if (expect_false (!ev_is_active (w))) 4284 if (expect_false (!ev_is_active (w)))
3378 return; 4285 return;
3379 4286
… …
3393} 4300}
3394#endif 4301#endif
3395 4302
3396#if EV_PREPARE_ENABLE 4303#if EV_PREPARE_ENABLE
3397void 4304void
3398ev_prepare_start (EV_P_ ev_prepare *w) 4305ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3399{ 4306{
3400 if (expect_false (ev_is_active (w))) 4307 if (expect_false (ev_is_active (w)))
3401 return; 4308 return;
3402 4309
3403 EV_FREQUENT_CHECK; 4310 EV_FREQUENT_CHECK;
… …
3408 4315
3409 EV_FREQUENT_CHECK; 4316 EV_FREQUENT_CHECK;
3410} 4317}
3411 4318
3412void 4319void
3413ev_prepare_stop (EV_P_ ev_prepare *w) 4320ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3414{ 4321{
3415 clear_pending (EV_A_ (W)w); 4322 clear_pending (EV_A_ (W)w);
3416 if (expect_false (!ev_is_active (w))) 4323 if (expect_false (!ev_is_active (w)))
3417 return; 4324 return;
3418 4325
… …
3431} 4338}
3432#endif 4339#endif
3433 4340
3434#if EV_CHECK_ENABLE 4341#if EV_CHECK_ENABLE
3435void 4342void
3436ev_check_start (EV_P_ ev_check *w) 4343ev_check_start (EV_P_ ev_check *w) EV_THROW
3437{ 4344{
3438 if (expect_false (ev_is_active (w))) 4345 if (expect_false (ev_is_active (w)))
3439 return; 4346 return;
3440 4347
3441 EV_FREQUENT_CHECK; 4348 EV_FREQUENT_CHECK;
… …
3446 4353
3447 EV_FREQUENT_CHECK; 4354 EV_FREQUENT_CHECK;
3448} 4355}
3449 4356
3450void 4357void
3451ev_check_stop (EV_P_ ev_check *w) 4358ev_check_stop (EV_P_ ev_check *w) EV_THROW
3452{ 4359{
3453 clear_pending (EV_A_ (W)w); 4360 clear_pending (EV_A_ (W)w);
3454 if (expect_false (!ev_is_active (w))) 4361 if (expect_false (!ev_is_active (w)))
3455 return; 4362 return;
3456 4363
… …
3469} 4376}
3470#endif 4377#endif
3471 4378
3472#if EV_EMBED_ENABLE 4379#if EV_EMBED_ENABLE
3473void noinline 4380void noinline
3474ev_embed_sweep (EV_P_ ev_embed *w) 4381ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3475{ 4382{
3476 ev_run (w->other, EVRUN_NOWAIT); 4383 ev_run (w->other, EVRUN_NOWAIT);
3477} 4384}
3478 4385
3479static void 4386static void
… …
3527 ev_idle_stop (EV_A_ idle); 4434 ev_idle_stop (EV_A_ idle);
3528} 4435}
3529#endif 4436#endif
3530 4437
3531void 4438void
3532ev_embed_start (EV_P_ ev_embed *w) 4439ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3533{ 4440{
3534 if (expect_false (ev_is_active (w))) 4441 if (expect_false (ev_is_active (w)))
3535 return; 4442 return;
3536 4443
3537 { 4444 {
… …
3558 4465
3559 EV_FREQUENT_CHECK; 4466 EV_FREQUENT_CHECK;
3560} 4467}
3561 4468
3562void 4469void
3563ev_embed_stop (EV_P_ ev_embed *w) 4470ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3564{ 4471{
3565 clear_pending (EV_A_ (W)w); 4472 clear_pending (EV_A_ (W)w);
3566 if (expect_false (!ev_is_active (w))) 4473 if (expect_false (!ev_is_active (w)))
3567 return; 4474 return;
3568 4475
… …
3578} 4485}
3579#endif 4486#endif
3580 4487
3581#if EV_FORK_ENABLE 4488#if EV_FORK_ENABLE
3582void 4489void
3583ev_fork_start (EV_P_ ev_fork *w) 4490ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3584{ 4491{
3585 if (expect_false (ev_is_active (w))) 4492 if (expect_false (ev_is_active (w)))
3586 return; 4493 return;
3587 4494
3588 EV_FREQUENT_CHECK; 4495 EV_FREQUENT_CHECK;
… …
3593 4500
3594 EV_FREQUENT_CHECK; 4501 EV_FREQUENT_CHECK;
3595} 4502}
3596 4503
3597void 4504void
3598ev_fork_stop (EV_P_ ev_fork *w) 4505ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3599{ 4506{
3600 clear_pending (EV_A_ (W)w); 4507 clear_pending (EV_A_ (W)w);
3601 if (expect_false (!ev_is_active (w))) 4508 if (expect_false (!ev_is_active (w)))
3602 return; 4509 return;
3603 4510
… …
3616} 4523}
3617#endif 4524#endif
3618 4525
3619#if EV_CLEANUP_ENABLE 4526#if EV_CLEANUP_ENABLE
3620void 4527void
3621ev_cleanup_start (EV_P_ ev_cleanup *w) 4528ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3622{ 4529{
3623 if (expect_false (ev_is_active (w))) 4530 if (expect_false (ev_is_active (w)))
3624 return; 4531 return;
3625 4532
3626 EV_FREQUENT_CHECK; 4533 EV_FREQUENT_CHECK;
… …
3633 ev_unref (EV_A); 4540 ev_unref (EV_A);
3634 EV_FREQUENT_CHECK; 4541 EV_FREQUENT_CHECK;
3635} 4542}
3636 4543
3637void 4544void
3638ev_cleanup_stop (EV_P_ ev_cleanup *w) 4545ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3639{ 4546{
3640 clear_pending (EV_A_ (W)w); 4547 clear_pending (EV_A_ (W)w);
3641 if (expect_false (!ev_is_active (w))) 4548 if (expect_false (!ev_is_active (w)))
3642 return; 4549 return;
3643 4550
… …
3657} 4564}
3658#endif 4565#endif
3659 4566
3660#if EV_ASYNC_ENABLE 4567#if EV_ASYNC_ENABLE
3661void 4568void
3662ev_async_start (EV_P_ ev_async *w) 4569ev_async_start (EV_P_ ev_async *w) EV_THROW
3663{ 4570{
3664 if (expect_false (ev_is_active (w))) 4571 if (expect_false (ev_is_active (w)))
3665 return; 4572 return;
3666 4573
3667 w->sent = 0; 4574 w->sent = 0;
… …
3676 4583
3677 EV_FREQUENT_CHECK; 4584 EV_FREQUENT_CHECK;
3678} 4585}
3679 4586
3680void 4587void
3681ev_async_stop (EV_P_ ev_async *w) 4588ev_async_stop (EV_P_ ev_async *w) EV_THROW
3682{ 4589{
3683 clear_pending (EV_A_ (W)w); 4590 clear_pending (EV_A_ (W)w);
3684 if (expect_false (!ev_is_active (w))) 4591 if (expect_false (!ev_is_active (w)))
3685 return; 4592 return;
3686 4593
… …
3697 4604
3698 EV_FREQUENT_CHECK; 4605 EV_FREQUENT_CHECK;
3699} 4606}
3700 4607
3701void 4608void
3702ev_async_send (EV_P_ ev_async *w) 4609ev_async_send (EV_P_ ev_async *w) EV_THROW
3703{ 4610{
3704 w->sent = 1; 4611 w->sent = 1;
3705 evpipe_write (EV_A_ &async_pending); 4612 evpipe_write (EV_A_ &async_pending);
3706} 4613}
3707#endif 4614#endif
… …
3744 4651
3745 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4652 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3746} 4653}
3747 4654
3748void 4655void
3749ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4656ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3750{ 4657{
3751 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4658 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3752 4659
3753 if (expect_false (!once)) 4660 if (expect_false (!once))
3754 { 4661 {
… …
3775} 4682}
3776 4683
3777/*****************************************************************************/ 4684/*****************************************************************************/
3778 4685
3779#if EV_WALK_ENABLE 4686#if EV_WALK_ENABLE
3780void 4687void ecb_cold
3781ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4688ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3782{ 4689{
3783 int i, j; 4690 int i, j;
3784 ev_watcher_list *wl, *wn; 4691 ev_watcher_list *wl, *wn;
3785 4692
3786 if (types & (EV_IO | EV_EMBED)) 4693 if (types & (EV_IO | EV_EMBED))
… …
3829 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4736 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3830#endif 4737#endif
3831 4738
3832#if EV_IDLE_ENABLE 4739#if EV_IDLE_ENABLE
3833 if (types & EV_IDLE) 4740 if (types & EV_IDLE)
3834 for (j = NUMPRI; i--; ) 4741 for (j = NUMPRI; j--; )
3835 for (i = idlecnt [j]; i--; ) 4742 for (i = idlecnt [j]; i--; )
3836 cb (EV_A_ EV_IDLE, idles [j][i]); 4743 cb (EV_A_ EV_IDLE, idles [j][i]);
3837#endif 4744#endif
3838 4745
3839#if EV_FORK_ENABLE 4746#if EV_FORK_ENABLE
… …
3892 4799
3893#if EV_MULTIPLICITY 4800#if EV_MULTIPLICITY
3894 #include "ev_wrap.h" 4801 #include "ev_wrap.h"
3895#endif 4802#endif
3896 4803
3897EV_CPP(})
3898

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines