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Comparing libev/ev.c (file contents):
Revision 1.342 by root, Mon Mar 29 12:40:57 2010 UTC vs.
Revision 1.411 by root, Tue Feb 21 04:34:02 2012 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 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 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,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
77# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
79# endif 81# endif
80# endif 82# endif
81 83
84# if HAVE_NANOSLEEP
82# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP EV_FEATURE_OS 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
85# else 88# else
89# undef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
87# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
88# endif 100# endif
89 101
102# if HAVE_POLL && HAVE_POLL_H
90# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
92# define EV_USE_SELECT EV_FEATURE_BACKENDS 104# define EV_USE_POLL EV_FEATURE_BACKENDS
93# else
94# define EV_USE_SELECT 0
95# endif 105# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL EV_FEATURE_BACKENDS
101# else 106# else
107# undef EV_USE_POLL
102# define EV_USE_POLL 0 108# define EV_USE_POLL 0
103# endif
104# endif 109# endif
105 110
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
108# define EV_USE_EPOLL EV_FEATURE_BACKENDS 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
109# else
110# define EV_USE_EPOLL 0
111# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
112# endif 118# endif
113 119
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# else
118# define EV_USE_KQUEUE 0
119# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
120# endif 127# endif
121 128
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
124# define EV_USE_PORT EV_FEATURE_BACKENDS 131# define EV_USE_PORT EV_FEATURE_BACKENDS
125# else
126# define EV_USE_PORT 0
127# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
128# endif 136# endif
129 137
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
132# define EV_USE_INOTIFY EV_FEATURE_OS 140# define EV_USE_INOTIFY EV_FEATURE_OS
133# else
134# define EV_USE_INOTIFY 0
135# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
136# endif 145# endif
137 146
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H 147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
140# define EV_USE_SIGNALFD EV_FEATURE_OS 149# define EV_USE_SIGNALFD EV_FEATURE_OS
141# else
142# define EV_USE_SIGNALFD 0
143# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
144# endif 154# endif
145 155
156# if HAVE_EVENTFD
146# ifndef EV_USE_EVENTFD 157# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD EV_FEATURE_OS 158# define EV_USE_EVENTFD EV_FEATURE_OS
149# else
150# define EV_USE_EVENTFD 0
151# endif 159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
152# endif 163# endif
153 164
154#endif 165#endif
155 166
156#include <math.h>
157#include <stdlib.h> 167#include <stdlib.h>
158#include <string.h> 168#include <string.h>
159#include <fcntl.h> 169#include <fcntl.h>
160#include <stddef.h> 170#include <stddef.h>
161 171
… …
171 181
172#ifdef EV_H 182#ifdef EV_H
173# include EV_H 183# include EV_H
174#else 184#else
175# include "ev.h" 185# include "ev.h"
186#endif
187
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
176#endif 197#endif
177 198
178#ifndef _WIN32 199#ifndef _WIN32
179# include <sys/time.h> 200# include <sys/time.h>
180# include <sys/wait.h> 201# include <sys/wait.h>
… …
186# ifndef EV_SELECT_IS_WINSOCKET 207# ifndef EV_SELECT_IS_WINSOCKET
187# define EV_SELECT_IS_WINSOCKET 1 208# define EV_SELECT_IS_WINSOCKET 1
188# endif 209# endif
189# undef EV_AVOID_STDIO 210# undef EV_AVOID_STDIO
190#endif 211#endif
212
213/* OS X, in its infinite idiocy, actually HARDCODES
214 * a limit of 1024 into their select. Where people have brains,
215 * OS X engineers apparently have a vacuum. Or maybe they were
216 * ordered to have a vacuum, or they do anything for money.
217 * This might help. Or not.
218 */
219#define _DARWIN_UNLIMITED_SELECT 1
191 220
192/* this block tries to deduce configuration from header-defined symbols and defaults */ 221/* this block tries to deduce configuration from header-defined symbols and defaults */
193 222
194/* try to deduce the maximum number of signals on this platform */ 223/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG) 224#if defined (EV_NSIG)
… …
217/* to make it compile regardless, just remove the above line, */ 246/* to make it compile regardless, just remove the above line, */
218/* but consider reporting it, too! :) */ 247/* but consider reporting it, too! :) */
219# define EV_NSIG 65 248# define EV_NSIG 65
220#endif 249#endif
221 250
251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
253#endif
254
222#ifndef EV_USE_CLOCK_SYSCALL 255#ifndef EV_USE_CLOCK_SYSCALL
223# if __linux && __GLIBC__ >= 2 256# if __linux && __GLIBC__ >= 2
224# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
225# else 258# else
226# define EV_USE_CLOCK_SYSCALL 0 259# define EV_USE_CLOCK_SYSCALL 0
… …
361# undef EV_USE_INOTIFY 394# undef EV_USE_INOTIFY
362# define EV_USE_INOTIFY 0 395# define EV_USE_INOTIFY 0
363#endif 396#endif
364 397
365#if !EV_USE_NANOSLEEP 398#if !EV_USE_NANOSLEEP
366# ifndef _WIN32 399/* hp-ux has it in sys/time.h, which we unconditionally include above */
400# if !defined(_WIN32) && !defined(__hpux)
367# include <sys/select.h> 401# include <sys/select.h>
368# endif 402# endif
369#endif 403#endif
370 404
371#if EV_USE_INOTIFY 405#if EV_USE_INOTIFY
372# include <sys/utsname.h>
373# include <sys/statfs.h> 406# include <sys/statfs.h>
374# include <sys/inotify.h> 407# include <sys/inotify.h>
375/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 408/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
376# ifndef IN_DONT_FOLLOW 409# ifndef IN_DONT_FOLLOW
377# undef EV_USE_INOTIFY 410# undef EV_USE_INOTIFY
… …
394# define EFD_CLOEXEC O_CLOEXEC 427# define EFD_CLOEXEC O_CLOEXEC
395# else 428# else
396# define EFD_CLOEXEC 02000000 429# define EFD_CLOEXEC 02000000
397# endif 430# endif
398# endif 431# endif
399# ifdef __cplusplus
400extern "C" {
401# endif
402int (eventfd) (unsigned int initval, int flags); 432EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
403# ifdef __cplusplus
404}
405# endif
406#endif 433#endif
407 434
408#if EV_USE_SIGNALFD 435#if EV_USE_SIGNALFD
409/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 436/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
410# include <stdint.h> 437# include <stdint.h>
… …
416# define SFD_CLOEXEC O_CLOEXEC 443# define SFD_CLOEXEC O_CLOEXEC
417# else 444# else
418# define SFD_CLOEXEC 02000000 445# define SFD_CLOEXEC 02000000
419# endif 446# endif
420# endif 447# endif
421# ifdef __cplusplus
422extern "C" {
423# endif
424int signalfd (int fd, const sigset_t *mask, int flags); 448EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
425 449
426struct signalfd_siginfo 450struct signalfd_siginfo
427{ 451{
428 uint32_t ssi_signo; 452 uint32_t ssi_signo;
429 char pad[128 - sizeof (uint32_t)]; 453 char pad[128 - sizeof (uint32_t)];
430}; 454};
431# ifdef __cplusplus
432}
433# endif 455#endif
434#endif
435
436 456
437/**/ 457/**/
438 458
439#if EV_VERIFY >= 3 459#if EV_VERIFY >= 3
440# define EV_FREQUENT_CHECK ev_verify (EV_A) 460# define EV_FREQUENT_CHECK ev_verify (EV_A)
441#else 461#else
442# define EV_FREQUENT_CHECK do { } while (0) 462# define EV_FREQUENT_CHECK do { } while (0)
443#endif 463#endif
444 464
445/* 465/*
446 * This is used to avoid floating point rounding problems. 466 * This is used to work around floating point rounding problems.
447 * It is added to ev_rt_now when scheduling periodics
448 * to ensure progress, time-wise, even when rounding
449 * errors are against us.
450 * This value is good at least till the year 4000. 467 * This value is good at least till the year 4000.
451 * Better solutions welcome.
452 */ 468 */
453#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 469#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
470/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
454 471
455#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 472#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
456#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 473#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
457 474
475#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
476#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
477
478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
479/* ECB.H BEGIN */
480/*
481 * libecb - http://software.schmorp.de/pkg/libecb
482 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved.
486 *
487 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met:
489 *
490 * 1. Redistributions of source code must retain the above copyright notice,
491 * this list of conditions and the following disclaimer.
492 *
493 * 2. Redistributions in binary form must reproduce the above copyright
494 * notice, this list of conditions and the following disclaimer in the
495 * documentation and/or other materials provided with the distribution.
496 *
497 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
498 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
499 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
500 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
501 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
505 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE.
507 */
508
509#ifndef ECB_H
510#define ECB_H
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
458#if __GNUC__ >= 4 519 #if __GNUC__
459# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
460# define noinline __attribute__ ((noinline)) 521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
461#else 526#else
462# define expect(expr,value) (expr) 527 #include <inttypes.h>
463# define noinline
464# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
465# define inline
466# endif 528#endif
529
530/* many compilers define _GNUC_ to some versions but then only implement
531 * what their idiot authors think are the "more important" extensions,
532 * causing enormous grief in return for some better fake benchmark numbers.
533 * or so.
534 * we try to detect these and simply assume they are not gcc - if they have
535 * an issue with that they should have done it right in the first place.
536 */
537#ifndef ECB_GCC_VERSION
538 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
539 #define ECB_GCC_VERSION(major,minor) 0
540 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
467#endif 542 #endif
543#endif
468 544
545/*****************************************************************************/
546
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549
550#if ECB_NO_THREADS
551# define ECB_NO_SMP 1
552#endif
553
554#if ECB_NO_THREADS || ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0)
556#endif
557
558#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
571 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
574 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
576 #elif __sparc || __sparc__
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined(__s390__) || defined(__s390x__)
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #endif
583 #endif
584#endif
585
586#ifndef ECB_MEMORY_FENCE
587 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
588 #define ECB_MEMORY_FENCE __sync_synchronize ()
589 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
590 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
591 #elif _MSC_VER >= 1400 /* VC++ 2005 */
592 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
593 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
594 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
595 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
596 #elif defined(_WIN32)
597 #include <WinNT.h>
598 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
599 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
600 #include <mbarrier.h>
601 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
602 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
603 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
604 #endif
605#endif
606
607#ifndef ECB_MEMORY_FENCE
608 #if !ECB_AVOID_PTHREADS
609 /*
610 * if you get undefined symbol references to pthread_mutex_lock,
611 * or failure to find pthread.h, then you should implement
612 * the ECB_MEMORY_FENCE operations for your cpu/compiler
613 * OR provide pthread.h and link against the posix thread library
614 * of your system.
615 */
616 #include <pthread.h>
617 #define ECB_NEEDS_PTHREADS 1
618 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
619
620 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
621 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
622 #endif
623#endif
624
625#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
626 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
627#endif
628
629#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
630 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
631#endif
632
633/*****************************************************************************/
634
635#define ECB_C99 (__STDC_VERSION__ >= 199901L)
636
637#if __cplusplus
638 #define ecb_inline static inline
639#elif ECB_GCC_VERSION(2,5)
640 #define ecb_inline static __inline__
641#elif ECB_C99
642 #define ecb_inline static inline
643#else
644 #define ecb_inline static
645#endif
646
647#if ECB_GCC_VERSION(3,3)
648 #define ecb_restrict __restrict__
649#elif ECB_C99
650 #define ecb_restrict restrict
651#else
652 #define ecb_restrict
653#endif
654
655typedef int ecb_bool;
656
657#define ECB_CONCAT_(a, b) a ## b
658#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
659#define ECB_STRINGIFY_(a) # a
660#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
661
662#define ecb_function_ ecb_inline
663
664#if ECB_GCC_VERSION(3,1)
665 #define ecb_attribute(attrlist) __attribute__(attrlist)
666 #define ecb_is_constant(expr) __builtin_constant_p (expr)
667 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
668 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
669#else
670 #define ecb_attribute(attrlist)
671 #define ecb_is_constant(expr) 0
672 #define ecb_expect(expr,value) (expr)
673 #define ecb_prefetch(addr,rw,locality)
674#endif
675
676/* no emulation for ecb_decltype */
677#if ECB_GCC_VERSION(4,5)
678 #define ecb_decltype(x) __decltype(x)
679#elif ECB_GCC_VERSION(3,0)
680 #define ecb_decltype(x) __typeof(x)
681#endif
682
683#define ecb_noinline ecb_attribute ((__noinline__))
684#define ecb_noreturn ecb_attribute ((__noreturn__))
685#define ecb_unused ecb_attribute ((__unused__))
686#define ecb_const ecb_attribute ((__const__))
687#define ecb_pure ecb_attribute ((__pure__))
688
689#if ECB_GCC_VERSION(4,3)
690 #define ecb_artificial ecb_attribute ((__artificial__))
691 #define ecb_hot ecb_attribute ((__hot__))
692 #define ecb_cold ecb_attribute ((__cold__))
693#else
694 #define ecb_artificial
695 #define ecb_hot
696 #define ecb_cold
697#endif
698
699/* put around conditional expressions if you are very sure that the */
700/* expression is mostly true or mostly false. note that these return */
701/* booleans, not the expression. */
469#define expect_false(expr) expect ((expr) != 0, 0) 702#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
470#define expect_true(expr) expect ((expr) != 0, 1) 703#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
704/* for compatibility to the rest of the world */
705#define ecb_likely(expr) ecb_expect_true (expr)
706#define ecb_unlikely(expr) ecb_expect_false (expr)
707
708/* count trailing zero bits and count # of one bits */
709#if ECB_GCC_VERSION(3,4)
710 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
711 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
712 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
713 #define ecb_ctz32(x) __builtin_ctz (x)
714 #define ecb_ctz64(x) __builtin_ctzll (x)
715 #define ecb_popcount32(x) __builtin_popcount (x)
716 /* no popcountll */
717#else
718 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
719 ecb_function_ int
720 ecb_ctz32 (uint32_t x)
721 {
722 int r = 0;
723
724 x &= ~x + 1; /* this isolates the lowest bit */
725
726#if ECB_branchless_on_i386
727 r += !!(x & 0xaaaaaaaa) << 0;
728 r += !!(x & 0xcccccccc) << 1;
729 r += !!(x & 0xf0f0f0f0) << 2;
730 r += !!(x & 0xff00ff00) << 3;
731 r += !!(x & 0xffff0000) << 4;
732#else
733 if (x & 0xaaaaaaaa) r += 1;
734 if (x & 0xcccccccc) r += 2;
735 if (x & 0xf0f0f0f0) r += 4;
736 if (x & 0xff00ff00) r += 8;
737 if (x & 0xffff0000) r += 16;
738#endif
739
740 return r;
741 }
742
743 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
744 ecb_function_ int
745 ecb_ctz64 (uint64_t x)
746 {
747 int shift = x & 0xffffffffU ? 0 : 32;
748 return ecb_ctz32 (x >> shift) + shift;
749 }
750
751 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
752 ecb_function_ int
753 ecb_popcount32 (uint32_t x)
754 {
755 x -= (x >> 1) & 0x55555555;
756 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
757 x = ((x >> 4) + x) & 0x0f0f0f0f;
758 x *= 0x01010101;
759
760 return x >> 24;
761 }
762
763 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
764 ecb_function_ int ecb_ld32 (uint32_t x)
765 {
766 int r = 0;
767
768 if (x >> 16) { x >>= 16; r += 16; }
769 if (x >> 8) { x >>= 8; r += 8; }
770 if (x >> 4) { x >>= 4; r += 4; }
771 if (x >> 2) { x >>= 2; r += 2; }
772 if (x >> 1) { r += 1; }
773
774 return r;
775 }
776
777 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
778 ecb_function_ int ecb_ld64 (uint64_t x)
779 {
780 int r = 0;
781
782 if (x >> 32) { x >>= 32; r += 32; }
783
784 return r + ecb_ld32 (x);
785 }
786#endif
787
788ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
789ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
790{
791 return ( (x * 0x0802U & 0x22110U)
792 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
793}
794
795ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
796ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
797{
798 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
799 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
800 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
801 x = ( x >> 8 ) | ( x << 8);
802
803 return x;
804}
805
806ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
807ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
808{
809 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
810 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
811 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
812 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
813 x = ( x >> 16 ) | ( x << 16);
814
815 return x;
816}
817
818/* popcount64 is only available on 64 bit cpus as gcc builtin */
819/* so for this version we are lazy */
820ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
821ecb_function_ int
822ecb_popcount64 (uint64_t x)
823{
824 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
825}
826
827ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
828ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
829ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
830ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
831ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
832ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
833ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
834ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
835
836ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
837ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
838ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
839ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
840ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
841ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
842ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
843ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
844
845#if ECB_GCC_VERSION(4,3)
846 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
847 #define ecb_bswap32(x) __builtin_bswap32 (x)
848 #define ecb_bswap64(x) __builtin_bswap64 (x)
849#else
850 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
851 ecb_function_ uint16_t
852 ecb_bswap16 (uint16_t x)
853 {
854 return ecb_rotl16 (x, 8);
855 }
856
857 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
858 ecb_function_ uint32_t
859 ecb_bswap32 (uint32_t x)
860 {
861 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
862 }
863
864 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
865 ecb_function_ uint64_t
866 ecb_bswap64 (uint64_t x)
867 {
868 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
869 }
870#endif
871
872#if ECB_GCC_VERSION(4,5)
873 #define ecb_unreachable() __builtin_unreachable ()
874#else
875 /* this seems to work fine, but gcc always emits a warning for it :/ */
876 ecb_inline void ecb_unreachable (void) ecb_noreturn;
877 ecb_inline void ecb_unreachable (void) { }
878#endif
879
880/* try to tell the compiler that some condition is definitely true */
881#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
882
883ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
884ecb_inline unsigned char
885ecb_byteorder_helper (void)
886{
887 const uint32_t u = 0x11223344;
888 return *(unsigned char *)&u;
889}
890
891ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
892ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
893ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
894ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
895
896#if ECB_GCC_VERSION(3,0) || ECB_C99
897 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
898#else
899 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
900#endif
901
902#if __cplusplus
903 template<typename T>
904 static inline T ecb_div_rd (T val, T div)
905 {
906 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
907 }
908 template<typename T>
909 static inline T ecb_div_ru (T val, T div)
910 {
911 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
912 }
913#else
914 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
915 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
916#endif
917
918#if ecb_cplusplus_does_not_suck
919 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
920 template<typename T, int N>
921 static inline int ecb_array_length (const T (&arr)[N])
922 {
923 return N;
924 }
925#else
926 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
927#endif
928
929#endif
930
931/* ECB.H END */
932
933#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
934/* if your architecture doesn't need memory fences, e.g. because it is
935 * single-cpu/core, or if you use libev in a project that doesn't use libev
936 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
937 * libev, in which cases the memory fences become nops.
938 * alternatively, you can remove this #error and link against libpthread,
939 * which will then provide the memory fences.
940 */
941# error "memory fences not defined for your architecture, please report"
942#endif
943
944#ifndef ECB_MEMORY_FENCE
945# define ECB_MEMORY_FENCE do { } while (0)
946# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
947# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
948#endif
949
950#define expect_false(cond) ecb_expect_false (cond)
951#define expect_true(cond) ecb_expect_true (cond)
952#define noinline ecb_noinline
953
471#define inline_size static inline 954#define inline_size ecb_inline
472 955
473#if EV_FEATURE_CODE 956#if EV_FEATURE_CODE
474# define inline_speed static inline 957# define inline_speed ecb_inline
475#else 958#else
476# define inline_speed static noinline 959# define inline_speed static noinline
477#endif 960#endif
478 961
479#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 962#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
494#define ev_active(w) ((W)(w))->active 977#define ev_active(w) ((W)(w))->active
495#define ev_at(w) ((WT)(w))->at 978#define ev_at(w) ((WT)(w))->at
496 979
497#if EV_USE_REALTIME 980#if EV_USE_REALTIME
498/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 981/* sig_atomic_t is used to avoid per-thread variables or locking but still */
499/* giving it a reasonably high chance of working on typical architetcures */ 982/* giving it a reasonably high chance of working on typical architectures */
500static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 983static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
501#endif 984#endif
502 985
503#if EV_USE_MONOTONIC 986#if EV_USE_MONOTONIC
504static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 987static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
518# include "ev_win32.c" 1001# include "ev_win32.c"
519#endif 1002#endif
520 1003
521/*****************************************************************************/ 1004/*****************************************************************************/
522 1005
1006/* define a suitable floor function (only used by periodics atm) */
1007
1008#if EV_USE_FLOOR
1009# include <math.h>
1010# define ev_floor(v) floor (v)
1011#else
1012
1013#include <float.h>
1014
1015/* a floor() replacement function, should be independent of ev_tstamp type */
1016static ev_tstamp noinline
1017ev_floor (ev_tstamp v)
1018{
1019 /* the choice of shift factor is not terribly important */
1020#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1021 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1022#else
1023 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1024#endif
1025
1026 /* argument too large for an unsigned long? */
1027 if (expect_false (v >= shift))
1028 {
1029 ev_tstamp f;
1030
1031 if (v == v - 1.)
1032 return v; /* very large number */
1033
1034 f = shift * ev_floor (v * (1. / shift));
1035 return f + ev_floor (v - f);
1036 }
1037
1038 /* special treatment for negative args? */
1039 if (expect_false (v < 0.))
1040 {
1041 ev_tstamp f = -ev_floor (-v);
1042
1043 return f - (f == v ? 0 : 1);
1044 }
1045
1046 /* fits into an unsigned long */
1047 return (unsigned long)v;
1048}
1049
1050#endif
1051
1052/*****************************************************************************/
1053
1054#ifdef __linux
1055# include <sys/utsname.h>
1056#endif
1057
1058static unsigned int noinline ecb_cold
1059ev_linux_version (void)
1060{
1061#ifdef __linux
1062 unsigned int v = 0;
1063 struct utsname buf;
1064 int i;
1065 char *p = buf.release;
1066
1067 if (uname (&buf))
1068 return 0;
1069
1070 for (i = 3+1; --i; )
1071 {
1072 unsigned int c = 0;
1073
1074 for (;;)
1075 {
1076 if (*p >= '0' && *p <= '9')
1077 c = c * 10 + *p++ - '0';
1078 else
1079 {
1080 p += *p == '.';
1081 break;
1082 }
1083 }
1084
1085 v = (v << 8) | c;
1086 }
1087
1088 return v;
1089#else
1090 return 0;
1091#endif
1092}
1093
1094/*****************************************************************************/
1095
523#if EV_AVOID_STDIO 1096#if EV_AVOID_STDIO
524static void noinline 1097static void noinline ecb_cold
525ev_printerr (const char *msg) 1098ev_printerr (const char *msg)
526{ 1099{
527 write (STDERR_FILENO, msg, strlen (msg)); 1100 write (STDERR_FILENO, msg, strlen (msg));
528} 1101}
529#endif 1102#endif
530 1103
531static void (*syserr_cb)(const char *msg); 1104static void (*syserr_cb)(const char *msg);
532 1105
533void 1106void ecb_cold
534ev_set_syserr_cb (void (*cb)(const char *msg)) 1107ev_set_syserr_cb (void (*cb)(const char *msg))
535{ 1108{
536 syserr_cb = cb; 1109 syserr_cb = cb;
537} 1110}
538 1111
539static void noinline 1112static void noinline ecb_cold
540ev_syserr (const char *msg) 1113ev_syserr (const char *msg)
541{ 1114{
542 if (!msg) 1115 if (!msg)
543 msg = "(libev) system error"; 1116 msg = "(libev) system error";
544 1117
545 if (syserr_cb) 1118 if (syserr_cb)
546 syserr_cb (msg); 1119 syserr_cb (msg);
547 else 1120 else
548 { 1121 {
549#if EV_AVOID_STDIO 1122#if EV_AVOID_STDIO
550 const char *err = strerror (errno);
551
552 ev_printerr (msg); 1123 ev_printerr (msg);
553 ev_printerr (": "); 1124 ev_printerr (": ");
554 ev_printerr (err); 1125 ev_printerr (strerror (errno));
555 ev_printerr ("\n"); 1126 ev_printerr ("\n");
556#else 1127#else
557 perror (msg); 1128 perror (msg);
558#endif 1129#endif
559 abort (); 1130 abort ();
… …
579#endif 1150#endif
580} 1151}
581 1152
582static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1153static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
583 1154
584void 1155void ecb_cold
585ev_set_allocator (void *(*cb)(void *ptr, long size)) 1156ev_set_allocator (void *(*cb)(void *ptr, long size))
586{ 1157{
587 alloc = cb; 1158 alloc = cb;
588} 1159}
589 1160
… …
593 ptr = alloc (ptr, size); 1164 ptr = alloc (ptr, size);
594 1165
595 if (!ptr && size) 1166 if (!ptr && size)
596 { 1167 {
597#if EV_AVOID_STDIO 1168#if EV_AVOID_STDIO
598 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1169 ev_printerr ("(libev) memory allocation failed, aborting.\n");
599#else 1170#else
600 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1171 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
601#endif 1172#endif
602 abort (); 1173 abort ();
603 } 1174 }
604 1175
605 return ptr; 1176 return ptr;
… …
622 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1193 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
623 unsigned char unused; 1194 unsigned char unused;
624#if EV_USE_EPOLL 1195#if EV_USE_EPOLL
625 unsigned int egen; /* generation counter to counter epoll bugs */ 1196 unsigned int egen; /* generation counter to counter epoll bugs */
626#endif 1197#endif
627#if EV_SELECT_IS_WINSOCKET 1198#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
628 SOCKET handle; 1199 SOCKET handle;
1200#endif
1201#if EV_USE_IOCP
1202 OVERLAPPED or, ow;
629#endif 1203#endif
630} ANFD; 1204} ANFD;
631 1205
632/* stores the pending event set for a given watcher */ 1206/* stores the pending event set for a given watcher */
633typedef struct 1207typedef struct
… …
675 #undef VAR 1249 #undef VAR
676 }; 1250 };
677 #include "ev_wrap.h" 1251 #include "ev_wrap.h"
678 1252
679 static struct ev_loop default_loop_struct; 1253 static struct ev_loop default_loop_struct;
680 struct ev_loop *ev_default_loop_ptr; 1254 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
681 1255
682#else 1256#else
683 1257
684 ev_tstamp ev_rt_now; 1258 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
685 #define VAR(name,decl) static decl; 1259 #define VAR(name,decl) static decl;
686 #include "ev_vars.h" 1260 #include "ev_vars.h"
687 #undef VAR 1261 #undef VAR
688 1262
689 static int ev_default_loop_ptr; 1263 static int ev_default_loop_ptr;
… …
698# define EV_RELEASE_CB (void)0 1272# define EV_RELEASE_CB (void)0
699# define EV_ACQUIRE_CB (void)0 1273# define EV_ACQUIRE_CB (void)0
700# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1274# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
701#endif 1275#endif
702 1276
703#define EVUNLOOP_RECURSE 0x80 1277#define EVBREAK_RECURSE 0x80
704 1278
705/*****************************************************************************/ 1279/*****************************************************************************/
706 1280
707#ifndef EV_HAVE_EV_TIME 1281#ifndef EV_HAVE_EV_TIME
708ev_tstamp 1282ev_tstamp
… …
752 if (delay > 0.) 1326 if (delay > 0.)
753 { 1327 {
754#if EV_USE_NANOSLEEP 1328#if EV_USE_NANOSLEEP
755 struct timespec ts; 1329 struct timespec ts;
756 1330
757 ts.tv_sec = (time_t)delay; 1331 EV_TS_SET (ts, delay);
758 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
759
760 nanosleep (&ts, 0); 1332 nanosleep (&ts, 0);
761#elif defined(_WIN32) 1333#elif defined(_WIN32)
762 Sleep ((unsigned long)(delay * 1e3)); 1334 Sleep ((unsigned long)(delay * 1e3));
763#else 1335#else
764 struct timeval tv; 1336 struct timeval tv;
765 1337
766 tv.tv_sec = (time_t)delay;
767 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
768
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1338 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770 /* something not guaranteed by newer posix versions, but guaranteed */ 1339 /* something not guaranteed by newer posix versions, but guaranteed */
771 /* by older ones */ 1340 /* by older ones */
1341 EV_TV_SET (tv, delay);
772 select (0, 0, 0, 0, &tv); 1342 select (0, 0, 0, 0, &tv);
773#endif 1343#endif
774 } 1344 }
775} 1345}
776 1346
777/*****************************************************************************/ 1347/*****************************************************************************/
778 1348
779#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1349#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
780 1350
781/* find a suitable new size for the given array, */ 1351/* find a suitable new size for the given array, */
782/* hopefully by rounding to a ncie-to-malloc size */ 1352/* hopefully by rounding to a nice-to-malloc size */
783inline_size int 1353inline_size int
784array_nextsize (int elem, int cur, int cnt) 1354array_nextsize (int elem, int cur, int cnt)
785{ 1355{
786 int ncur = cur + 1; 1356 int ncur = cur + 1;
787 1357
788 do 1358 do
789 ncur <<= 1; 1359 ncur <<= 1;
790 while (cnt > ncur); 1360 while (cnt > ncur);
791 1361
792 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1362 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
793 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1363 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
794 { 1364 {
795 ncur *= elem; 1365 ncur *= elem;
796 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1366 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
797 ncur = ncur - sizeof (void *) * 4; 1367 ncur = ncur - sizeof (void *) * 4;
… …
799 } 1369 }
800 1370
801 return ncur; 1371 return ncur;
802} 1372}
803 1373
804static noinline void * 1374static void * noinline ecb_cold
805array_realloc (int elem, void *base, int *cur, int cnt) 1375array_realloc (int elem, void *base, int *cur, int cnt)
806{ 1376{
807 *cur = array_nextsize (elem, *cur, cnt); 1377 *cur = array_nextsize (elem, *cur, cnt);
808 return ev_realloc (base, elem * *cur); 1378 return ev_realloc (base, elem * *cur);
809} 1379}
… …
812 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1382 memset ((void *)(base), 0, sizeof (*(base)) * (count))
813 1383
814#define array_needsize(type,base,cur,cnt,init) \ 1384#define array_needsize(type,base,cur,cnt,init) \
815 if (expect_false ((cnt) > (cur))) \ 1385 if (expect_false ((cnt) > (cur))) \
816 { \ 1386 { \
817 int ocur_ = (cur); \ 1387 int ecb_unused ocur_ = (cur); \
818 (base) = (type *)array_realloc \ 1388 (base) = (type *)array_realloc \
819 (sizeof (type), (base), &(cur), (cnt)); \ 1389 (sizeof (type), (base), &(cur), (cnt)); \
820 init ((base) + (ocur_), (cur) - ocur_); \ 1390 init ((base) + (ocur_), (cur) - ocur_); \
821 } 1391 }
822 1392
… …
922inline_size void 1492inline_size void
923fd_reify (EV_P) 1493fd_reify (EV_P)
924{ 1494{
925 int i; 1495 int i;
926 1496
1497#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1498 for (i = 0; i < fdchangecnt; ++i)
1499 {
1500 int fd = fdchanges [i];
1501 ANFD *anfd = anfds + fd;
1502
1503 if (anfd->reify & EV__IOFDSET && anfd->head)
1504 {
1505 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1506
1507 if (handle != anfd->handle)
1508 {
1509 unsigned long arg;
1510
1511 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1512
1513 /* handle changed, but fd didn't - we need to do it in two steps */
1514 backend_modify (EV_A_ fd, anfd->events, 0);
1515 anfd->events = 0;
1516 anfd->handle = handle;
1517 }
1518 }
1519 }
1520#endif
1521
927 for (i = 0; i < fdchangecnt; ++i) 1522 for (i = 0; i < fdchangecnt; ++i)
928 { 1523 {
929 int fd = fdchanges [i]; 1524 int fd = fdchanges [i];
930 ANFD *anfd = anfds + fd; 1525 ANFD *anfd = anfds + fd;
931 ev_io *w; 1526 ev_io *w;
932 1527
933 unsigned char events = 0; 1528 unsigned char o_events = anfd->events;
1529 unsigned char o_reify = anfd->reify;
934 1530
935 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1531 anfd->reify = 0;
936 events |= (unsigned char)w->events;
937 1532
938#if EV_SELECT_IS_WINSOCKET 1533 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
939 if (events)
940 { 1534 {
941 unsigned long arg; 1535 anfd->events = 0;
942 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1536
943 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1537 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1538 anfd->events |= (unsigned char)w->events;
1539
1540 if (o_events != anfd->events)
1541 o_reify = EV__IOFDSET; /* actually |= */
944 } 1542 }
945#endif
946 1543
947 { 1544 if (o_reify & EV__IOFDSET)
948 unsigned char o_events = anfd->events;
949 unsigned char o_reify = anfd->reify;
950
951 anfd->reify = 0;
952 anfd->events = events;
953
954 if (o_events != events || o_reify & EV__IOFDSET)
955 backend_modify (EV_A_ fd, o_events, events); 1545 backend_modify (EV_A_ fd, o_events, anfd->events);
956 }
957 } 1546 }
958 1547
959 fdchangecnt = 0; 1548 fdchangecnt = 0;
960} 1549}
961 1550
… …
973 fdchanges [fdchangecnt - 1] = fd; 1562 fdchanges [fdchangecnt - 1] = fd;
974 } 1563 }
975} 1564}
976 1565
977/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1566/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
978inline_speed void 1567inline_speed void ecb_cold
979fd_kill (EV_P_ int fd) 1568fd_kill (EV_P_ int fd)
980{ 1569{
981 ev_io *w; 1570 ev_io *w;
982 1571
983 while ((w = (ev_io *)anfds [fd].head)) 1572 while ((w = (ev_io *)anfds [fd].head))
… …
986 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1575 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
987 } 1576 }
988} 1577}
989 1578
990/* check whether the given fd is actually valid, for error recovery */ 1579/* check whether the given fd is actually valid, for error recovery */
991inline_size int 1580inline_size int ecb_cold
992fd_valid (int fd) 1581fd_valid (int fd)
993{ 1582{
994#ifdef _WIN32 1583#ifdef _WIN32
995 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1584 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
996#else 1585#else
997 return fcntl (fd, F_GETFD) != -1; 1586 return fcntl (fd, F_GETFD) != -1;
998#endif 1587#endif
999} 1588}
1000 1589
1001/* called on EBADF to verify fds */ 1590/* called on EBADF to verify fds */
1002static void noinline 1591static void noinline ecb_cold
1003fd_ebadf (EV_P) 1592fd_ebadf (EV_P)
1004{ 1593{
1005 int fd; 1594 int fd;
1006 1595
1007 for (fd = 0; fd < anfdmax; ++fd) 1596 for (fd = 0; fd < anfdmax; ++fd)
… …
1009 if (!fd_valid (fd) && errno == EBADF) 1598 if (!fd_valid (fd) && errno == EBADF)
1010 fd_kill (EV_A_ fd); 1599 fd_kill (EV_A_ fd);
1011} 1600}
1012 1601
1013/* called on ENOMEM in select/poll to kill some fds and retry */ 1602/* called on ENOMEM in select/poll to kill some fds and retry */
1014static void noinline 1603static void noinline ecb_cold
1015fd_enomem (EV_P) 1604fd_enomem (EV_P)
1016{ 1605{
1017 int fd; 1606 int fd;
1018 1607
1019 for (fd = anfdmax; fd--; ) 1608 for (fd = anfdmax; fd--; )
… …
1054} 1643}
1055 1644
1056/*****************************************************************************/ 1645/*****************************************************************************/
1057 1646
1058/* 1647/*
1059 * the heap functions want a real array index. array index 0 uis guaranteed to not 1648 * the heap functions want a real array index. array index 0 is guaranteed to not
1060 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1649 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1061 * the branching factor of the d-tree. 1650 * the branching factor of the d-tree.
1062 */ 1651 */
1063 1652
1064/* 1653/*
… …
1214 1803
1215/*****************************************************************************/ 1804/*****************************************************************************/
1216 1805
1217#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 1806#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1218 1807
1219static void noinline 1808static void noinline ecb_cold
1220evpipe_init (EV_P) 1809evpipe_init (EV_P)
1221{ 1810{
1222 if (!ev_is_active (&pipe_w)) 1811 if (!ev_is_active (&pipe_w))
1223 { 1812 {
1224# if EV_USE_EVENTFD 1813# if EV_USE_EVENTFD
… …
1246 ev_io_start (EV_A_ &pipe_w); 1835 ev_io_start (EV_A_ &pipe_w);
1247 ev_unref (EV_A); /* watcher should not keep loop alive */ 1836 ev_unref (EV_A); /* watcher should not keep loop alive */
1248 } 1837 }
1249} 1838}
1250 1839
1251inline_size void 1840inline_speed void
1252evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1841evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253{ 1842{
1254 if (!*flag) 1843 if (expect_true (*flag))
1844 return;
1845
1846 *flag = 1;
1847
1848 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1849
1850 pipe_write_skipped = 1;
1851
1852 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1853
1854 if (pipe_write_wanted)
1255 { 1855 {
1856 int old_errno;
1857
1858 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1859
1256 int old_errno = errno; /* save errno because write might clobber it */ 1860 old_errno = errno; /* save errno because write will clobber it */
1257 char dummy;
1258
1259 *flag = 1;
1260 1861
1261#if EV_USE_EVENTFD 1862#if EV_USE_EVENTFD
1262 if (evfd >= 0) 1863 if (evfd >= 0)
1263 { 1864 {
1264 uint64_t counter = 1; 1865 uint64_t counter = 1;
1265 write (evfd, &counter, sizeof (uint64_t)); 1866 write (evfd, &counter, sizeof (uint64_t));
1266 } 1867 }
1267 else 1868 else
1268#endif 1869#endif
1870 {
1871 /* win32 people keep sending patches that change this write() to send() */
1872 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1873 /* so when you think this write should be a send instead, please find out */
1874 /* where your send() is from - it's definitely not the microsoft send, and */
1875 /* tell me. thank you. */
1876 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1877 /* check the ev documentation on how to use this flag */
1269 write (evpipe [1], &dummy, 1); 1878 write (evpipe [1], &(evpipe [1]), 1);
1879 }
1270 1880
1271 errno = old_errno; 1881 errno = old_errno;
1272 } 1882 }
1273} 1883}
1274 1884
… …
1277static void 1887static void
1278pipecb (EV_P_ ev_io *iow, int revents) 1888pipecb (EV_P_ ev_io *iow, int revents)
1279{ 1889{
1280 int i; 1890 int i;
1281 1891
1892 if (revents & EV_READ)
1893 {
1282#if EV_USE_EVENTFD 1894#if EV_USE_EVENTFD
1283 if (evfd >= 0) 1895 if (evfd >= 0)
1284 { 1896 {
1285 uint64_t counter; 1897 uint64_t counter;
1286 read (evfd, &counter, sizeof (uint64_t)); 1898 read (evfd, &counter, sizeof (uint64_t));
1287 } 1899 }
1288 else 1900 else
1289#endif 1901#endif
1290 { 1902 {
1291 char dummy; 1903 char dummy;
1904 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1292 read (evpipe [0], &dummy, 1); 1905 read (evpipe [0], &dummy, 1);
1906 }
1293 } 1907 }
1294 1908
1909 pipe_write_skipped = 0;
1910
1911#if EV_SIGNAL_ENABLE
1295 if (sig_pending) 1912 if (sig_pending)
1296 { 1913 {
1297 sig_pending = 0; 1914 sig_pending = 0;
1298 1915
1299 for (i = EV_NSIG - 1; i--; ) 1916 for (i = EV_NSIG - 1; i--; )
1300 if (expect_false (signals [i].pending)) 1917 if (expect_false (signals [i].pending))
1301 ev_feed_signal_event (EV_A_ i + 1); 1918 ev_feed_signal_event (EV_A_ i + 1);
1302 } 1919 }
1920#endif
1303 1921
1304#if EV_ASYNC_ENABLE 1922#if EV_ASYNC_ENABLE
1305 if (async_pending) 1923 if (async_pending)
1306 { 1924 {
1307 async_pending = 0; 1925 async_pending = 0;
… …
1316#endif 1934#endif
1317} 1935}
1318 1936
1319/*****************************************************************************/ 1937/*****************************************************************************/
1320 1938
1939void
1940ev_feed_signal (int signum)
1941{
1942#if EV_MULTIPLICITY
1943 EV_P = signals [signum - 1].loop;
1944
1945 if (!EV_A)
1946 return;
1947#endif
1948
1949 if (!ev_active (&pipe_w))
1950 return;
1951
1952 signals [signum - 1].pending = 1;
1953 evpipe_write (EV_A_ &sig_pending);
1954}
1955
1321static void 1956static void
1322ev_sighandler (int signum) 1957ev_sighandler (int signum)
1323{ 1958{
1324#if EV_MULTIPLICITY
1325 EV_P = signals [signum - 1].loop;
1326#endif
1327
1328#ifdef _WIN32 1959#ifdef _WIN32
1329 signal (signum, ev_sighandler); 1960 signal (signum, ev_sighandler);
1330#endif 1961#endif
1331 1962
1332 signals [signum - 1].pending = 1; 1963 ev_feed_signal (signum);
1333 evpipe_write (EV_A_ &sig_pending);
1334} 1964}
1335 1965
1336void noinline 1966void noinline
1337ev_feed_signal_event (EV_P_ int signum) 1967ev_feed_signal_event (EV_P_ int signum)
1338{ 1968{
… …
1438 2068
1439#endif 2069#endif
1440 2070
1441/*****************************************************************************/ 2071/*****************************************************************************/
1442 2072
2073#if EV_USE_IOCP
2074# include "ev_iocp.c"
2075#endif
1443#if EV_USE_PORT 2076#if EV_USE_PORT
1444# include "ev_port.c" 2077# include "ev_port.c"
1445#endif 2078#endif
1446#if EV_USE_KQUEUE 2079#if EV_USE_KQUEUE
1447# include "ev_kqueue.c" 2080# include "ev_kqueue.c"
… …
1454#endif 2087#endif
1455#if EV_USE_SELECT 2088#if EV_USE_SELECT
1456# include "ev_select.c" 2089# include "ev_select.c"
1457#endif 2090#endif
1458 2091
1459int 2092int ecb_cold
1460ev_version_major (void) 2093ev_version_major (void)
1461{ 2094{
1462 return EV_VERSION_MAJOR; 2095 return EV_VERSION_MAJOR;
1463} 2096}
1464 2097
1465int 2098int ecb_cold
1466ev_version_minor (void) 2099ev_version_minor (void)
1467{ 2100{
1468 return EV_VERSION_MINOR; 2101 return EV_VERSION_MINOR;
1469} 2102}
1470 2103
1471/* return true if we are running with elevated privileges and should ignore env variables */ 2104/* return true if we are running with elevated privileges and should ignore env variables */
1472int inline_size 2105int inline_size ecb_cold
1473enable_secure (void) 2106enable_secure (void)
1474{ 2107{
1475#ifdef _WIN32 2108#ifdef _WIN32
1476 return 0; 2109 return 0;
1477#else 2110#else
1478 return getuid () != geteuid () 2111 return getuid () != geteuid ()
1479 || getgid () != getegid (); 2112 || getgid () != getegid ();
1480#endif 2113#endif
1481} 2114}
1482 2115
1483unsigned int 2116unsigned int ecb_cold
1484ev_supported_backends (void) 2117ev_supported_backends (void)
1485{ 2118{
1486 unsigned int flags = 0; 2119 unsigned int flags = 0;
1487 2120
1488 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2121 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1492 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2125 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1493 2126
1494 return flags; 2127 return flags;
1495} 2128}
1496 2129
1497unsigned int 2130unsigned int ecb_cold
1498ev_recommended_backends (void) 2131ev_recommended_backends (void)
1499{ 2132{
1500 unsigned int flags = ev_supported_backends (); 2133 unsigned int flags = ev_supported_backends ();
1501 2134
1502#ifndef __NetBSD__ 2135#ifndef __NetBSD__
… …
1514#endif 2147#endif
1515 2148
1516 return flags; 2149 return flags;
1517} 2150}
1518 2151
1519unsigned int 2152unsigned int ecb_cold
1520ev_embeddable_backends (void) 2153ev_embeddable_backends (void)
1521{ 2154{
1522 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2155 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1523 2156
1524 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2157 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1525 /* please fix it and tell me how to detect the fix */ 2158 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1526 flags &= ~EVBACKEND_EPOLL; 2159 flags &= ~EVBACKEND_EPOLL;
1527 2160
1528 return flags; 2161 return flags;
1529} 2162}
1530 2163
1531unsigned int 2164unsigned int
… …
1569ev_userdata (EV_P) 2202ev_userdata (EV_P)
1570{ 2203{
1571 return userdata; 2204 return userdata;
1572} 2205}
1573 2206
2207void
1574void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2208ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1575{ 2209{
1576 invoke_cb = invoke_pending_cb; 2210 invoke_cb = invoke_pending_cb;
1577} 2211}
1578 2212
2213void
1579void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2214ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1580{ 2215{
1581 release_cb = release; 2216 release_cb = release;
1582 acquire_cb = acquire; 2217 acquire_cb = acquire;
1583} 2218}
1584#endif 2219#endif
1585 2220
1586/* initialise a loop structure, must be zero-initialised */ 2221/* initialise a loop structure, must be zero-initialised */
1587static void noinline 2222static void noinline ecb_cold
1588loop_init (EV_P_ unsigned int flags) 2223loop_init (EV_P_ unsigned int flags)
1589{ 2224{
1590 if (!backend) 2225 if (!backend)
1591 { 2226 {
2227 origflags = flags;
2228
1592#if EV_USE_REALTIME 2229#if EV_USE_REALTIME
1593 if (!have_realtime) 2230 if (!have_realtime)
1594 { 2231 {
1595 struct timespec ts; 2232 struct timespec ts;
1596 2233
… …
1618 if (!(flags & EVFLAG_NOENV) 2255 if (!(flags & EVFLAG_NOENV)
1619 && !enable_secure () 2256 && !enable_secure ()
1620 && getenv ("LIBEV_FLAGS")) 2257 && getenv ("LIBEV_FLAGS"))
1621 flags = atoi (getenv ("LIBEV_FLAGS")); 2258 flags = atoi (getenv ("LIBEV_FLAGS"));
1622 2259
1623 ev_rt_now = ev_time (); 2260 ev_rt_now = ev_time ();
1624 mn_now = get_clock (); 2261 mn_now = get_clock ();
1625 now_floor = mn_now; 2262 now_floor = mn_now;
1626 rtmn_diff = ev_rt_now - mn_now; 2263 rtmn_diff = ev_rt_now - mn_now;
1627#if EV_FEATURE_API 2264#if EV_FEATURE_API
1628 invoke_cb = ev_invoke_pending; 2265 invoke_cb = ev_invoke_pending;
1629#endif 2266#endif
1630 2267
1631 io_blocktime = 0.; 2268 io_blocktime = 0.;
1632 timeout_blocktime = 0.; 2269 timeout_blocktime = 0.;
1633 backend = 0; 2270 backend = 0;
1634 backend_fd = -1; 2271 backend_fd = -1;
1635 sig_pending = 0; 2272 sig_pending = 0;
1636#if EV_ASYNC_ENABLE 2273#if EV_ASYNC_ENABLE
1637 async_pending = 0; 2274 async_pending = 0;
1638#endif 2275#endif
2276 pipe_write_skipped = 0;
2277 pipe_write_wanted = 0;
1639#if EV_USE_INOTIFY 2278#if EV_USE_INOTIFY
1640 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2279 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1641#endif 2280#endif
1642#if EV_USE_SIGNALFD 2281#if EV_USE_SIGNALFD
1643 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2282 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1644#endif 2283#endif
1645 2284
1646 if (!(flags & 0x0000ffffU)) 2285 if (!(flags & EVBACKEND_MASK))
1647 flags |= ev_recommended_backends (); 2286 flags |= ev_recommended_backends ();
1648 2287
2288#if EV_USE_IOCP
2289 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2290#endif
1649#if EV_USE_PORT 2291#if EV_USE_PORT
1650 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2292 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1651#endif 2293#endif
1652#if EV_USE_KQUEUE 2294#if EV_USE_KQUEUE
1653 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2295 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1670#endif 2312#endif
1671 } 2313 }
1672} 2314}
1673 2315
1674/* free up a loop structure */ 2316/* free up a loop structure */
1675static void noinline 2317void ecb_cold
1676loop_destroy (EV_P) 2318ev_loop_destroy (EV_P)
1677{ 2319{
1678 int i; 2320 int i;
2321
2322#if EV_MULTIPLICITY
2323 /* mimic free (0) */
2324 if (!EV_A)
2325 return;
2326#endif
2327
2328#if EV_CLEANUP_ENABLE
2329 /* queue cleanup watchers (and execute them) */
2330 if (expect_false (cleanupcnt))
2331 {
2332 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2333 EV_INVOKE_PENDING;
2334 }
2335#endif
2336
2337#if EV_CHILD_ENABLE
2338 if (ev_is_active (&childev))
2339 {
2340 ev_ref (EV_A); /* child watcher */
2341 ev_signal_stop (EV_A_ &childev);
2342 }
2343#endif
1679 2344
1680 if (ev_is_active (&pipe_w)) 2345 if (ev_is_active (&pipe_w))
1681 { 2346 {
1682 /*ev_ref (EV_A);*/ 2347 /*ev_ref (EV_A);*/
1683 /*ev_io_stop (EV_A_ &pipe_w);*/ 2348 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1705#endif 2370#endif
1706 2371
1707 if (backend_fd >= 0) 2372 if (backend_fd >= 0)
1708 close (backend_fd); 2373 close (backend_fd);
1709 2374
2375#if EV_USE_IOCP
2376 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2377#endif
1710#if EV_USE_PORT 2378#if EV_USE_PORT
1711 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2379 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1712#endif 2380#endif
1713#if EV_USE_KQUEUE 2381#if EV_USE_KQUEUE
1714 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2382 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1741 array_free (periodic, EMPTY); 2409 array_free (periodic, EMPTY);
1742#endif 2410#endif
1743#if EV_FORK_ENABLE 2411#if EV_FORK_ENABLE
1744 array_free (fork, EMPTY); 2412 array_free (fork, EMPTY);
1745#endif 2413#endif
2414#if EV_CLEANUP_ENABLE
2415 array_free (cleanup, EMPTY);
2416#endif
1746 array_free (prepare, EMPTY); 2417 array_free (prepare, EMPTY);
1747 array_free (check, EMPTY); 2418 array_free (check, EMPTY);
1748#if EV_ASYNC_ENABLE 2419#if EV_ASYNC_ENABLE
1749 array_free (async, EMPTY); 2420 array_free (async, EMPTY);
1750#endif 2421#endif
1751 2422
1752 backend = 0; 2423 backend = 0;
2424
2425#if EV_MULTIPLICITY
2426 if (ev_is_default_loop (EV_A))
2427#endif
2428 ev_default_loop_ptr = 0;
2429#if EV_MULTIPLICITY
2430 else
2431 ev_free (EV_A);
2432#endif
1753} 2433}
1754 2434
1755#if EV_USE_INOTIFY 2435#if EV_USE_INOTIFY
1756inline_size void infy_fork (EV_P); 2436inline_size void infy_fork (EV_P);
1757#endif 2437#endif
… …
1772 infy_fork (EV_A); 2452 infy_fork (EV_A);
1773#endif 2453#endif
1774 2454
1775 if (ev_is_active (&pipe_w)) 2455 if (ev_is_active (&pipe_w))
1776 { 2456 {
1777 /* this "locks" the handlers against writing to the pipe */ 2457 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1778 /* while we modify the fd vars */
1779 sig_pending = 1;
1780#if EV_ASYNC_ENABLE
1781 async_pending = 1;
1782#endif
1783 2458
1784 ev_ref (EV_A); 2459 ev_ref (EV_A);
1785 ev_io_stop (EV_A_ &pipe_w); 2460 ev_io_stop (EV_A_ &pipe_w);
1786 2461
1787#if EV_USE_EVENTFD 2462#if EV_USE_EVENTFD
… …
1805 postfork = 0; 2480 postfork = 0;
1806} 2481}
1807 2482
1808#if EV_MULTIPLICITY 2483#if EV_MULTIPLICITY
1809 2484
1810struct ev_loop * 2485struct ev_loop * ecb_cold
1811ev_loop_new (unsigned int flags) 2486ev_loop_new (unsigned int flags)
1812{ 2487{
1813 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2488 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1814 2489
1815 memset (EV_A, 0, sizeof (struct ev_loop)); 2490 memset (EV_A, 0, sizeof (struct ev_loop));
1816 loop_init (EV_A_ flags); 2491 loop_init (EV_A_ flags);
1817 2492
1818 if (ev_backend (EV_A)) 2493 if (ev_backend (EV_A))
1819 return EV_A; 2494 return EV_A;
1820 2495
2496 ev_free (EV_A);
1821 return 0; 2497 return 0;
1822} 2498}
1823 2499
1824void
1825ev_loop_destroy (EV_P)
1826{
1827 loop_destroy (EV_A);
1828 ev_free (loop);
1829}
1830
1831void
1832ev_loop_fork (EV_P)
1833{
1834 postfork = 1; /* must be in line with ev_default_fork */
1835}
1836#endif /* multiplicity */ 2500#endif /* multiplicity */
1837 2501
1838#if EV_VERIFY 2502#if EV_VERIFY
1839static void noinline 2503static void noinline ecb_cold
1840verify_watcher (EV_P_ W w) 2504verify_watcher (EV_P_ W w)
1841{ 2505{
1842 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2506 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1843 2507
1844 if (w->pending) 2508 if (w->pending)
1845 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2509 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1846} 2510}
1847 2511
1848static void noinline 2512static void noinline ecb_cold
1849verify_heap (EV_P_ ANHE *heap, int N) 2513verify_heap (EV_P_ ANHE *heap, int N)
1850{ 2514{
1851 int i; 2515 int i;
1852 2516
1853 for (i = HEAP0; i < N + HEAP0; ++i) 2517 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1858 2522
1859 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2523 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1860 } 2524 }
1861} 2525}
1862 2526
1863static void noinline 2527static void noinline ecb_cold
1864array_verify (EV_P_ W *ws, int cnt) 2528array_verify (EV_P_ W *ws, int cnt)
1865{ 2529{
1866 while (cnt--) 2530 while (cnt--)
1867 { 2531 {
1868 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2532 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1870 } 2534 }
1871} 2535}
1872#endif 2536#endif
1873 2537
1874#if EV_FEATURE_API 2538#if EV_FEATURE_API
1875void 2539void ecb_cold
1876ev_verify (EV_P) 2540ev_verify (EV_P)
1877{ 2541{
1878#if EV_VERIFY 2542#if EV_VERIFY
1879 int i; 2543 int i;
1880 WL w; 2544 WL w;
… …
1915#if EV_FORK_ENABLE 2579#if EV_FORK_ENABLE
1916 assert (forkmax >= forkcnt); 2580 assert (forkmax >= forkcnt);
1917 array_verify (EV_A_ (W *)forks, forkcnt); 2581 array_verify (EV_A_ (W *)forks, forkcnt);
1918#endif 2582#endif
1919 2583
2584#if EV_CLEANUP_ENABLE
2585 assert (cleanupmax >= cleanupcnt);
2586 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2587#endif
2588
1920#if EV_ASYNC_ENABLE 2589#if EV_ASYNC_ENABLE
1921 assert (asyncmax >= asynccnt); 2590 assert (asyncmax >= asynccnt);
1922 array_verify (EV_A_ (W *)asyncs, asynccnt); 2591 array_verify (EV_A_ (W *)asyncs, asynccnt);
1923#endif 2592#endif
1924 2593
… …
1941#endif 2610#endif
1942} 2611}
1943#endif 2612#endif
1944 2613
1945#if EV_MULTIPLICITY 2614#if EV_MULTIPLICITY
1946struct ev_loop * 2615struct ev_loop * ecb_cold
1947ev_default_loop_init (unsigned int flags)
1948#else 2616#else
1949int 2617int
2618#endif
1950ev_default_loop (unsigned int flags) 2619ev_default_loop (unsigned int flags)
1951#endif
1952{ 2620{
1953 if (!ev_default_loop_ptr) 2621 if (!ev_default_loop_ptr)
1954 { 2622 {
1955#if EV_MULTIPLICITY 2623#if EV_MULTIPLICITY
1956 EV_P = ev_default_loop_ptr = &default_loop_struct; 2624 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1975 2643
1976 return ev_default_loop_ptr; 2644 return ev_default_loop_ptr;
1977} 2645}
1978 2646
1979void 2647void
1980ev_default_destroy (void) 2648ev_loop_fork (EV_P)
1981{ 2649{
1982#if EV_MULTIPLICITY
1983 EV_P = ev_default_loop_ptr;
1984#endif
1985
1986 ev_default_loop_ptr = 0;
1987
1988#if EV_CHILD_ENABLE
1989 ev_ref (EV_A); /* child watcher */
1990 ev_signal_stop (EV_A_ &childev);
1991#endif
1992
1993 loop_destroy (EV_A);
1994}
1995
1996void
1997ev_default_fork (void)
1998{
1999#if EV_MULTIPLICITY
2000 EV_P = ev_default_loop_ptr;
2001#endif
2002
2003 postfork = 1; /* must be in line with ev_loop_fork */ 2650 postfork = 1; /* must be in line with ev_default_fork */
2004} 2651}
2005 2652
2006/*****************************************************************************/ 2653/*****************************************************************************/
2007 2654
2008void 2655void
… …
2030 2677
2031 for (pri = NUMPRI; pri--; ) 2678 for (pri = NUMPRI; pri--; )
2032 while (pendingcnt [pri]) 2679 while (pendingcnt [pri])
2033 { 2680 {
2034 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2681 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2035
2036 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2037 /* ^ this is no longer true, as pending_w could be here */
2038 2682
2039 p->w->pending = 0; 2683 p->w->pending = 0;
2040 EV_CB_INVOKE (p->w, p->events); 2684 EV_CB_INVOKE (p->w, p->events);
2041 EV_FREQUENT_CHECK; 2685 EV_FREQUENT_CHECK;
2042 } 2686 }
… …
2104 feed_reverse_done (EV_A_ EV_TIMER); 2748 feed_reverse_done (EV_A_ EV_TIMER);
2105 } 2749 }
2106} 2750}
2107 2751
2108#if EV_PERIODIC_ENABLE 2752#if EV_PERIODIC_ENABLE
2753
2754static void noinline
2755periodic_recalc (EV_P_ ev_periodic *w)
2756{
2757 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2758 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2759
2760 /* the above almost always errs on the low side */
2761 while (at <= ev_rt_now)
2762 {
2763 ev_tstamp nat = at + w->interval;
2764
2765 /* when resolution fails us, we use ev_rt_now */
2766 if (expect_false (nat == at))
2767 {
2768 at = ev_rt_now;
2769 break;
2770 }
2771
2772 at = nat;
2773 }
2774
2775 ev_at (w) = at;
2776}
2777
2109/* make periodics pending */ 2778/* make periodics pending */
2110inline_size void 2779inline_size void
2111periodics_reify (EV_P) 2780periodics_reify (EV_P)
2112{ 2781{
2113 EV_FREQUENT_CHECK; 2782 EV_FREQUENT_CHECK;
… …
2132 ANHE_at_cache (periodics [HEAP0]); 2801 ANHE_at_cache (periodics [HEAP0]);
2133 downheap (periodics, periodiccnt, HEAP0); 2802 downheap (periodics, periodiccnt, HEAP0);
2134 } 2803 }
2135 else if (w->interval) 2804 else if (w->interval)
2136 { 2805 {
2137 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2806 periodic_recalc (EV_A_ w);
2138 /* if next trigger time is not sufficiently in the future, put it there */
2139 /* this might happen because of floating point inexactness */
2140 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2141 {
2142 ev_at (w) += w->interval;
2143
2144 /* if interval is unreasonably low we might still have a time in the past */
2145 /* so correct this. this will make the periodic very inexact, but the user */
2146 /* has effectively asked to get triggered more often than possible */
2147 if (ev_at (w) < ev_rt_now)
2148 ev_at (w) = ev_rt_now;
2149 }
2150
2151 ANHE_at_cache (periodics [HEAP0]); 2807 ANHE_at_cache (periodics [HEAP0]);
2152 downheap (periodics, periodiccnt, HEAP0); 2808 downheap (periodics, periodiccnt, HEAP0);
2153 } 2809 }
2154 else 2810 else
2155 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2811 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2162 feed_reverse_done (EV_A_ EV_PERIODIC); 2818 feed_reverse_done (EV_A_ EV_PERIODIC);
2163 } 2819 }
2164} 2820}
2165 2821
2166/* simply recalculate all periodics */ 2822/* simply recalculate all periodics */
2167/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2823/* TODO: maybe ensure that at least one event happens when jumping forward? */
2168static void noinline 2824static void noinline ecb_cold
2169periodics_reschedule (EV_P) 2825periodics_reschedule (EV_P)
2170{ 2826{
2171 int i; 2827 int i;
2172 2828
2173 /* adjust periodics after time jump */ 2829 /* adjust periodics after time jump */
… …
2176 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2832 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2177 2833
2178 if (w->reschedule_cb) 2834 if (w->reschedule_cb)
2179 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2835 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2180 else if (w->interval) 2836 else if (w->interval)
2181 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2837 periodic_recalc (EV_A_ w);
2182 2838
2183 ANHE_at_cache (periodics [i]); 2839 ANHE_at_cache (periodics [i]);
2184 } 2840 }
2185 2841
2186 reheap (periodics, periodiccnt); 2842 reheap (periodics, periodiccnt);
2187} 2843}
2188#endif 2844#endif
2189 2845
2190/* adjust all timers by a given offset */ 2846/* adjust all timers by a given offset */
2191static void noinline 2847static void noinline ecb_cold
2192timers_reschedule (EV_P_ ev_tstamp adjust) 2848timers_reschedule (EV_P_ ev_tstamp adjust)
2193{ 2849{
2194 int i; 2850 int i;
2195 2851
2196 for (i = 0; i < timercnt; ++i) 2852 for (i = 0; i < timercnt; ++i)
… …
2233 * doesn't hurt either as we only do this on time-jumps or 2889 * doesn't hurt either as we only do this on time-jumps or
2234 * in the unlikely event of having been preempted here. 2890 * in the unlikely event of having been preempted here.
2235 */ 2891 */
2236 for (i = 4; --i; ) 2892 for (i = 4; --i; )
2237 { 2893 {
2894 ev_tstamp diff;
2238 rtmn_diff = ev_rt_now - mn_now; 2895 rtmn_diff = ev_rt_now - mn_now;
2239 2896
2897 diff = odiff - rtmn_diff;
2898
2240 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2899 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2241 return; /* all is well */ 2900 return; /* all is well */
2242 2901
2243 ev_rt_now = ev_time (); 2902 ev_rt_now = ev_time ();
2244 mn_now = get_clock (); 2903 mn_now = get_clock ();
2245 now_floor = mn_now; 2904 now_floor = mn_now;
… …
2268 mn_now = ev_rt_now; 2927 mn_now = ev_rt_now;
2269 } 2928 }
2270} 2929}
2271 2930
2272void 2931void
2273ev_loop (EV_P_ int flags) 2932ev_run (EV_P_ int flags)
2274{ 2933{
2275#if EV_FEATURE_API 2934#if EV_FEATURE_API
2276 ++loop_depth; 2935 ++loop_depth;
2277#endif 2936#endif
2278 2937
2279 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2938 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2280 2939
2281 loop_done = EVUNLOOP_CANCEL; 2940 loop_done = EVBREAK_CANCEL;
2282 2941
2283 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2942 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2284 2943
2285 do 2944 do
2286 { 2945 {
… …
2329 /* calculate blocking time */ 2988 /* calculate blocking time */
2330 { 2989 {
2331 ev_tstamp waittime = 0.; 2990 ev_tstamp waittime = 0.;
2332 ev_tstamp sleeptime = 0.; 2991 ev_tstamp sleeptime = 0.;
2333 2992
2993 /* remember old timestamp for io_blocktime calculation */
2994 ev_tstamp prev_mn_now = mn_now;
2995
2996 /* update time to cancel out callback processing overhead */
2997 time_update (EV_A_ 1e100);
2998
2999 /* from now on, we want a pipe-wake-up */
3000 pipe_write_wanted = 1;
3001
3002 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3003
2334 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3004 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2335 { 3005 {
2336 /* remember old timestamp for io_blocktime calculation */
2337 ev_tstamp prev_mn_now = mn_now;
2338
2339 /* update time to cancel out callback processing overhead */
2340 time_update (EV_A_ 1e100);
2341
2342 waittime = MAX_BLOCKTIME; 3006 waittime = MAX_BLOCKTIME;
2343 3007
2344 if (timercnt) 3008 if (timercnt)
2345 { 3009 {
2346 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3010 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2347 if (waittime > to) waittime = to; 3011 if (waittime > to) waittime = to;
2348 } 3012 }
2349 3013
2350#if EV_PERIODIC_ENABLE 3014#if EV_PERIODIC_ENABLE
2351 if (periodiccnt) 3015 if (periodiccnt)
2352 { 3016 {
2353 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3017 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2354 if (waittime > to) waittime = to; 3018 if (waittime > to) waittime = to;
2355 } 3019 }
2356#endif 3020#endif
2357 3021
2358 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3022 /* don't let timeouts decrease the waittime below timeout_blocktime */
2359 if (expect_false (waittime < timeout_blocktime)) 3023 if (expect_false (waittime < timeout_blocktime))
2360 waittime = timeout_blocktime; 3024 waittime = timeout_blocktime;
3025
3026 /* at this point, we NEED to wait, so we have to ensure */
3027 /* to pass a minimum nonzero value to the backend */
3028 if (expect_false (waittime < backend_mintime))
3029 waittime = backend_mintime;
2361 3030
2362 /* extra check because io_blocktime is commonly 0 */ 3031 /* extra check because io_blocktime is commonly 0 */
2363 if (expect_false (io_blocktime)) 3032 if (expect_false (io_blocktime))
2364 { 3033 {
2365 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3034 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2366 3035
2367 if (sleeptime > waittime - backend_fudge) 3036 if (sleeptime > waittime - backend_mintime)
2368 sleeptime = waittime - backend_fudge; 3037 sleeptime = waittime - backend_mintime;
2369 3038
2370 if (expect_true (sleeptime > 0.)) 3039 if (expect_true (sleeptime > 0.))
2371 { 3040 {
2372 ev_sleep (sleeptime); 3041 ev_sleep (sleeptime);
2373 waittime -= sleeptime; 3042 waittime -= sleeptime;
… …
2376 } 3045 }
2377 3046
2378#if EV_FEATURE_API 3047#if EV_FEATURE_API
2379 ++loop_count; 3048 ++loop_count;
2380#endif 3049#endif
2381 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 3050 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2382 backend_poll (EV_A_ waittime); 3051 backend_poll (EV_A_ waittime);
2383 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 3052 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3053
3054 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3055
3056 if (pipe_write_skipped)
3057 {
3058 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3059 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3060 }
3061
2384 3062
2385 /* update ev_rt_now, do magic */ 3063 /* update ev_rt_now, do magic */
2386 time_update (EV_A_ waittime + sleeptime); 3064 time_update (EV_A_ waittime + sleeptime);
2387 } 3065 }
2388 3066
… …
2406 EV_INVOKE_PENDING; 3084 EV_INVOKE_PENDING;
2407 } 3085 }
2408 while (expect_true ( 3086 while (expect_true (
2409 activecnt 3087 activecnt
2410 && !loop_done 3088 && !loop_done
2411 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3089 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2412 )); 3090 ));
2413 3091
2414 if (loop_done == EVUNLOOP_ONE) 3092 if (loop_done == EVBREAK_ONE)
2415 loop_done = EVUNLOOP_CANCEL; 3093 loop_done = EVBREAK_CANCEL;
2416 3094
2417#if EV_FEATURE_API 3095#if EV_FEATURE_API
2418 --loop_depth; 3096 --loop_depth;
2419#endif 3097#endif
2420} 3098}
2421 3099
2422void 3100void
2423ev_unloop (EV_P_ int how) 3101ev_break (EV_P_ int how)
2424{ 3102{
2425 loop_done = how; 3103 loop_done = how;
2426} 3104}
2427 3105
2428void 3106void
… …
2576 EV_FREQUENT_CHECK; 3254 EV_FREQUENT_CHECK;
2577 3255
2578 wlist_del (&anfds[w->fd].head, (WL)w); 3256 wlist_del (&anfds[w->fd].head, (WL)w);
2579 ev_stop (EV_A_ (W)w); 3257 ev_stop (EV_A_ (W)w);
2580 3258
2581 fd_change (EV_A_ w->fd, 1); 3259 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2582 3260
2583 EV_FREQUENT_CHECK; 3261 EV_FREQUENT_CHECK;
2584} 3262}
2585 3263
2586void noinline 3264void noinline
… …
2639 3317
2640void noinline 3318void noinline
2641ev_timer_again (EV_P_ ev_timer *w) 3319ev_timer_again (EV_P_ ev_timer *w)
2642{ 3320{
2643 EV_FREQUENT_CHECK; 3321 EV_FREQUENT_CHECK;
3322
3323 clear_pending (EV_A_ (W)w);
2644 3324
2645 if (ev_is_active (w)) 3325 if (ev_is_active (w))
2646 { 3326 {
2647 if (w->repeat) 3327 if (w->repeat)
2648 { 3328 {
… …
2678 if (w->reschedule_cb) 3358 if (w->reschedule_cb)
2679 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3359 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2680 else if (w->interval) 3360 else if (w->interval)
2681 { 3361 {
2682 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3362 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2683 /* this formula differs from the one in periodic_reify because we do not always round up */ 3363 periodic_recalc (EV_A_ w);
2684 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2685 } 3364 }
2686 else 3365 else
2687 ev_at (w) = w->offset; 3366 ev_at (w) = w->offset;
2688 3367
2689 EV_FREQUENT_CHECK; 3368 EV_FREQUENT_CHECK;
… …
2810 sa.sa_handler = ev_sighandler; 3489 sa.sa_handler = ev_sighandler;
2811 sigfillset (&sa.sa_mask); 3490 sigfillset (&sa.sa_mask);
2812 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3491 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2813 sigaction (w->signum, &sa, 0); 3492 sigaction (w->signum, &sa, 0);
2814 3493
3494 if (origflags & EVFLAG_NOSIGMASK)
3495 {
2815 sigemptyset (&sa.sa_mask); 3496 sigemptyset (&sa.sa_mask);
2816 sigaddset (&sa.sa_mask, w->signum); 3497 sigaddset (&sa.sa_mask, w->signum);
2817 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3498 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3499 }
2818#endif 3500#endif
2819 } 3501 }
2820 3502
2821 EV_FREQUENT_CHECK; 3503 EV_FREQUENT_CHECK;
2822} 3504}
… …
2963 if (!pend || pend == path) 3645 if (!pend || pend == path)
2964 break; 3646 break;
2965 3647
2966 *pend = 0; 3648 *pend = 0;
2967 w->wd = inotify_add_watch (fs_fd, path, mask); 3649 w->wd = inotify_add_watch (fs_fd, path, mask);
2968 } 3650 }
2969 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3651 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2970 } 3652 }
2971 } 3653 }
2972 3654
2973 if (w->wd >= 0) 3655 if (w->wd >= 0)
… …
3040 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3722 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3041 ofs += sizeof (struct inotify_event) + ev->len; 3723 ofs += sizeof (struct inotify_event) + ev->len;
3042 } 3724 }
3043} 3725}
3044 3726
3045inline_size unsigned int
3046ev_linux_version (void)
3047{
3048 struct utsname buf;
3049 unsigned int v;
3050 int i;
3051 char *p = buf.release;
3052
3053 if (uname (&buf))
3054 return 0;
3055
3056 for (i = 3+1; --i; )
3057 {
3058 unsigned int c = 0;
3059
3060 for (;;)
3061 {
3062 if (*p >= '0' && *p <= '9')
3063 c = c * 10 + *p++ - '0';
3064 else
3065 {
3066 p += *p == '.';
3067 break;
3068 }
3069 }
3070
3071 v = (v << 8) | c;
3072 }
3073
3074 return v;
3075}
3076
3077inline_size void 3727inline_size void ecb_cold
3078ev_check_2625 (EV_P) 3728ev_check_2625 (EV_P)
3079{ 3729{
3080 /* kernels < 2.6.25 are borked 3730 /* kernels < 2.6.25 are borked
3081 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3731 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3082 */ 3732 */
… …
3403 4053
3404#if EV_EMBED_ENABLE 4054#if EV_EMBED_ENABLE
3405void noinline 4055void noinline
3406ev_embed_sweep (EV_P_ ev_embed *w) 4056ev_embed_sweep (EV_P_ ev_embed *w)
3407{ 4057{
3408 ev_loop (w->other, EVLOOP_NONBLOCK); 4058 ev_run (w->other, EVRUN_NOWAIT);
3409} 4059}
3410 4060
3411static void 4061static void
3412embed_io_cb (EV_P_ ev_io *io, int revents) 4062embed_io_cb (EV_P_ ev_io *io, int revents)
3413{ 4063{
3414 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4064 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3415 4065
3416 if (ev_cb (w)) 4066 if (ev_cb (w))
3417 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4067 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3418 else 4068 else
3419 ev_loop (w->other, EVLOOP_NONBLOCK); 4069 ev_run (w->other, EVRUN_NOWAIT);
3420} 4070}
3421 4071
3422static void 4072static void
3423embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4073embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3424{ 4074{
… …
3428 EV_P = w->other; 4078 EV_P = w->other;
3429 4079
3430 while (fdchangecnt) 4080 while (fdchangecnt)
3431 { 4081 {
3432 fd_reify (EV_A); 4082 fd_reify (EV_A);
3433 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4083 ev_run (EV_A_ EVRUN_NOWAIT);
3434 } 4084 }
3435 } 4085 }
3436} 4086}
3437 4087
3438static void 4088static void
… …
3444 4094
3445 { 4095 {
3446 EV_P = w->other; 4096 EV_P = w->other;
3447 4097
3448 ev_loop_fork (EV_A); 4098 ev_loop_fork (EV_A);
3449 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4099 ev_run (EV_A_ EVRUN_NOWAIT);
3450 } 4100 }
3451 4101
3452 ev_embed_start (EV_A_ w); 4102 ev_embed_start (EV_A_ w);
3453} 4103}
3454 4104
… …
3546 4196
3547 EV_FREQUENT_CHECK; 4197 EV_FREQUENT_CHECK;
3548} 4198}
3549#endif 4199#endif
3550 4200
4201#if EV_CLEANUP_ENABLE
4202void
4203ev_cleanup_start (EV_P_ ev_cleanup *w)
4204{
4205 if (expect_false (ev_is_active (w)))
4206 return;
4207
4208 EV_FREQUENT_CHECK;
4209
4210 ev_start (EV_A_ (W)w, ++cleanupcnt);
4211 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4212 cleanups [cleanupcnt - 1] = w;
4213
4214 /* cleanup watchers should never keep a refcount on the loop */
4215 ev_unref (EV_A);
4216 EV_FREQUENT_CHECK;
4217}
4218
4219void
4220ev_cleanup_stop (EV_P_ ev_cleanup *w)
4221{
4222 clear_pending (EV_A_ (W)w);
4223 if (expect_false (!ev_is_active (w)))
4224 return;
4225
4226 EV_FREQUENT_CHECK;
4227 ev_ref (EV_A);
4228
4229 {
4230 int active = ev_active (w);
4231
4232 cleanups [active - 1] = cleanups [--cleanupcnt];
4233 ev_active (cleanups [active - 1]) = active;
4234 }
4235
4236 ev_stop (EV_A_ (W)w);
4237
4238 EV_FREQUENT_CHECK;
4239}
4240#endif
4241
3551#if EV_ASYNC_ENABLE 4242#if EV_ASYNC_ENABLE
3552void 4243void
3553ev_async_start (EV_P_ ev_async *w) 4244ev_async_start (EV_P_ ev_async *w)
3554{ 4245{
3555 if (expect_false (ev_is_active (w))) 4246 if (expect_false (ev_is_active (w)))
3556 return; 4247 return;
4248
4249 w->sent = 0;
3557 4250
3558 evpipe_init (EV_A); 4251 evpipe_init (EV_A);
3559 4252
3560 EV_FREQUENT_CHECK; 4253 EV_FREQUENT_CHECK;
3561 4254
… …
3664} 4357}
3665 4358
3666/*****************************************************************************/ 4359/*****************************************************************************/
3667 4360
3668#if EV_WALK_ENABLE 4361#if EV_WALK_ENABLE
3669void 4362void ecb_cold
3670ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4363ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3671{ 4364{
3672 int i, j; 4365 int i, j;
3673 ev_watcher_list *wl, *wn; 4366 ev_watcher_list *wl, *wn;
3674 4367
… …
3718 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4411 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3719#endif 4412#endif
3720 4413
3721#if EV_IDLE_ENABLE 4414#if EV_IDLE_ENABLE
3722 if (types & EV_IDLE) 4415 if (types & EV_IDLE)
3723 for (j = NUMPRI; i--; ) 4416 for (j = NUMPRI; j--; )
3724 for (i = idlecnt [j]; i--; ) 4417 for (i = idlecnt [j]; i--; )
3725 cb (EV_A_ EV_IDLE, idles [j][i]); 4418 cb (EV_A_ EV_IDLE, idles [j][i]);
3726#endif 4419#endif
3727 4420
3728#if EV_FORK_ENABLE 4421#if EV_FORK_ENABLE
… …
3781 4474
3782#if EV_MULTIPLICITY 4475#if EV_MULTIPLICITY
3783 #include "ev_wrap.h" 4476 #include "ev_wrap.h"
3784#endif 4477#endif
3785 4478
3786#ifdef __cplusplus
3787}
3788#endif
3789

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