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

Comparing libev/ev.c (file contents):
Revision 1.339 by root, Tue Mar 16 00:43:22 2010 UTC vs.
Revision 1.390 by root, Thu Aug 4 11:58:02 2011 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
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"
176#endif 186#endif
187
188EV_CPP(extern "C" {)
177 189
178#ifndef _WIN32 190#ifndef _WIN32
179# include <sys/time.h> 191# include <sys/time.h>
180# include <sys/wait.h> 192# include <sys/wait.h>
181# include <unistd.h> 193# include <unistd.h>
186# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
187# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
188# endif 200# endif
189# undef EV_AVOID_STDIO 201# undef EV_AVOID_STDIO
190#endif 202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
191 211
192/* this block tries to deduce configuration from header-defined symbols and defaults */ 212/* this block tries to deduce configuration from header-defined symbols and defaults */
193 213
194/* try to deduce the maximum number of signals on this platform */ 214/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG) 215#if defined (EV_NSIG)
217/* to make it compile regardless, just remove the above line, */ 237/* to make it compile regardless, just remove the above line, */
218/* but consider reporting it, too! :) */ 238/* but consider reporting it, too! :) */
219# define EV_NSIG 65 239# define EV_NSIG 65
220#endif 240#endif
221 241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
222#ifndef EV_USE_CLOCK_SYSCALL 246#ifndef EV_USE_CLOCK_SYSCALL
223# if __linux && __GLIBC__ >= 2 247# if __linux && __GLIBC__ >= 2
224# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
225# else 249# else
226# define EV_USE_CLOCK_SYSCALL 0 250# define EV_USE_CLOCK_SYSCALL 0
361# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
362# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
363#endif 387#endif
364 388
365#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
366# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
367# include <sys/select.h> 392# include <sys/select.h>
368# endif 393# endif
369#endif 394#endif
370 395
371#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
372# include <sys/utsname.h>
373# include <sys/statfs.h> 397# include <sys/statfs.h>
374# include <sys/inotify.h> 398# include <sys/inotify.h>
375/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
376# ifndef IN_DONT_FOLLOW 400# ifndef IN_DONT_FOLLOW
377# undef EV_USE_INOTIFY 401# undef EV_USE_INOTIFY
394# define EFD_CLOEXEC O_CLOEXEC 418# define EFD_CLOEXEC O_CLOEXEC
395# else 419# else
396# define EFD_CLOEXEC 02000000 420# define EFD_CLOEXEC 02000000
397# endif 421# endif
398# endif 422# endif
399# ifdef __cplusplus
400extern "C" {
401# endif
402int (eventfd) (unsigned int initval, int flags); 423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
403# ifdef __cplusplus
404}
405# endif
406#endif 424#endif
407 425
408#if EV_USE_SIGNALFD 426#if EV_USE_SIGNALFD
409/* 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 */
410# include <stdint.h> 428# include <stdint.h>
416# define SFD_CLOEXEC O_CLOEXEC 434# define SFD_CLOEXEC O_CLOEXEC
417# else 435# else
418# define SFD_CLOEXEC 02000000 436# define SFD_CLOEXEC 02000000
419# endif 437# endif
420# endif 438# endif
421# ifdef __cplusplus
422extern "C" {
423# endif
424int signalfd (int fd, const sigset_t *mask, int flags); 439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
425 440
426struct signalfd_siginfo 441struct signalfd_siginfo
427{ 442{
428 uint32_t ssi_signo; 443 uint32_t ssi_signo;
429 char pad[128 - sizeof (uint32_t)]; 444 char pad[128 - sizeof (uint32_t)];
430}; 445};
431# ifdef __cplusplus
432}
433# endif 446#endif
434#endif
435
436 447
437/**/ 448/**/
438 449
439#if EV_VERIFY >= 3 450#if EV_VERIFY >= 3
440# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 451# define EV_FREQUENT_CHECK ev_verify (EV_A)
441#else 452#else
442# define EV_FREQUENT_CHECK do { } while (0) 453# define EV_FREQUENT_CHECK do { } while (0)
443#endif 454#endif
444 455
445/* 456/*
446 * This is used to avoid floating point rounding problems. 457 * 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. 458 * This value is good at least till the year 4000.
451 * Better solutions welcome.
452 */ 459 */
453#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
454 462
455#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#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) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
457 465
458#if __GNUC__ >= 4 466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
459# define expect(expr,value) __builtin_expect ((expr),(value)) 467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
460# define noinline __attribute__ ((noinline)) 468
469/* the following are taken from libecb */
470/* ecb.h start */
471
472/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers.
475 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place.
478 */
479#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
481 #define ECB_GCC_VERSION(major,minor) 0
482 #else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
484 #endif
485#endif
486
487#if __cplusplus
488 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__
491#elif ECB_C99
492 #define ecb_inline static inline
461#else 493#else
462# define expect(expr,value) (expr) 494 #define ecb_inline static
463# define noinline
464# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
465# define inline
466# endif 495#endif
496
497#ifndef ECB_MEMORY_FENCE
498 #if ECB_GCC_VERSION(2,5)
499 #if __x86
500 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
501 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
502 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */
503 #elif __amd64
504 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
505 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
506 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
507 #endif
467#endif 508 #endif
509#endif
468 510
511#ifndef ECB_MEMORY_FENCE
512 #if ECB_GCC_VERSION(4,4)
513 #define ECB_MEMORY_FENCE __sync_synchronize ()
514 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
515 #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
516 #elif _MSC_VER >= 1400 /* VC++ 2005 */
517 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
518 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
519 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
520 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
521 #elif defined(_WIN32)
522 #include <WinNT.h>
523 #define ECB_MEMORY_FENCE MemoryBarrier ()
524 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
525 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
526 #endif
527#endif
528
529#ifndef ECB_MEMORY_FENCE
530 #include <pthread.h>
531
532 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
533 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
534 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
535 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
536#endif
537
538#if ECB_GCC_VERSION(3,1)
539 #define ecb_attribute(attrlist) __attribute__(attrlist)
540 #define ecb_is_constant(expr) __builtin_constant_p (expr)
541 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
542 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
543#else
544 #define ecb_attribute(attrlist)
545 #define ecb_is_constant(expr) 0
546 #define ecb_expect(expr,value) (expr)
547 #define ecb_prefetch(addr,rw,locality)
548#endif
549
550#define ecb_noinline ecb_attribute ((__noinline__))
551#define ecb_noreturn ecb_attribute ((__noreturn__))
552#define ecb_unused ecb_attribute ((__unused__))
553#define ecb_const ecb_attribute ((__const__))
554#define ecb_pure ecb_attribute ((__pure__))
555
556#if ECB_GCC_VERSION(4,3)
557 #define ecb_artificial ecb_attribute ((__artificial__))
558 #define ecb_hot ecb_attribute ((__hot__))
559 #define ecb_cold ecb_attribute ((__cold__))
560#else
561 #define ecb_artificial
562 #define ecb_hot
563 #define ecb_cold
564#endif
565
566/* put around conditional expressions if you are very sure that the */
567/* expression is mostly true or mostly false. note that these return */
568/* booleans, not the expression. */
469#define expect_false(expr) expect ((expr) != 0, 0) 569#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
470#define expect_true(expr) expect ((expr) != 0, 1) 570#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
571/* ecb.h end */
572
573#define expect_false(cond) ecb_expect_false (cond)
574#define expect_true(cond) ecb_expect_true (cond)
575#define noinline ecb_noinline
576
471#define inline_size static inline 577#define inline_size ecb_inline
472 578
473#if EV_FEATURE_CODE 579#if EV_FEATURE_CODE
474# define inline_speed static inline 580# define inline_speed ecb_inline
475#else 581#else
476# define inline_speed static noinline 582# define inline_speed static noinline
477#endif 583#endif
478 584
479#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 585#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
494#define ev_active(w) ((W)(w))->active 600#define ev_active(w) ((W)(w))->active
495#define ev_at(w) ((WT)(w))->at 601#define ev_at(w) ((WT)(w))->at
496 602
497#if EV_USE_REALTIME 603#if EV_USE_REALTIME
498/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 604/* 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 */ 605/* giving it a reasonably high chance of working on typical architectures */
500static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 606static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
501#endif 607#endif
502 608
503#if EV_USE_MONOTONIC 609#if EV_USE_MONOTONIC
504static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 610static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
518# include "ev_win32.c" 624# include "ev_win32.c"
519#endif 625#endif
520 626
521/*****************************************************************************/ 627/*****************************************************************************/
522 628
629/* define a suitable floor function (only used by periodics atm) */
630
631#if EV_USE_FLOOR
632# include <math.h>
633# define ev_floor(v) floor (v)
634#else
635
636#include <float.h>
637
638/* a floor() replacement function, should be independent of ev_tstamp type */
639static ev_tstamp noinline
640ev_floor (ev_tstamp v)
641{
642 /* the choice of shift factor is not terribly important */
643#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
644 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
645#else
646 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
647#endif
648
649 /* argument too large for an unsigned long? */
650 if (expect_false (v >= shift))
651 {
652 ev_tstamp f;
653
654 if (v == v - 1.)
655 return v; /* very large number */
656
657 f = shift * ev_floor (v * (1. / shift));
658 return f + ev_floor (v - f);
659 }
660
661 /* special treatment for negative args? */
662 if (expect_false (v < 0.))
663 {
664 ev_tstamp f = -ev_floor (-v);
665
666 return f - (f == v ? 0 : 1);
667 }
668
669 /* fits into an unsigned long */
670 return (unsigned long)v;
671}
672
673#endif
674
675/*****************************************************************************/
676
677#ifdef __linux
678# include <sys/utsname.h>
679#endif
680
681static unsigned int noinline ecb_cold
682ev_linux_version (void)
683{
684#ifdef __linux
685 unsigned int v = 0;
686 struct utsname buf;
687 int i;
688 char *p = buf.release;
689
690 if (uname (&buf))
691 return 0;
692
693 for (i = 3+1; --i; )
694 {
695 unsigned int c = 0;
696
697 for (;;)
698 {
699 if (*p >= '0' && *p <= '9')
700 c = c * 10 + *p++ - '0';
701 else
702 {
703 p += *p == '.';
704 break;
705 }
706 }
707
708 v = (v << 8) | c;
709 }
710
711 return v;
712#else
713 return 0;
714#endif
715}
716
717/*****************************************************************************/
718
523#if EV_AVOID_STDIO 719#if EV_AVOID_STDIO
524static void noinline 720static void noinline ecb_cold
525ev_printerr (const char *msg) 721ev_printerr (const char *msg)
526{ 722{
527 write (STDERR_FILENO, msg, strlen (msg)); 723 write (STDERR_FILENO, msg, strlen (msg));
528} 724}
529#endif 725#endif
530 726
531static void (*syserr_cb)(const char *msg); 727static void (*syserr_cb)(const char *msg);
532 728
533void 729void ecb_cold
534ev_set_syserr_cb (void (*cb)(const char *msg)) 730ev_set_syserr_cb (void (*cb)(const char *msg))
535{ 731{
536 syserr_cb = cb; 732 syserr_cb = cb;
537} 733}
538 734
539static void noinline 735static void noinline ecb_cold
540ev_syserr (const char *msg) 736ev_syserr (const char *msg)
541{ 737{
542 if (!msg) 738 if (!msg)
543 msg = "(libev) system error"; 739 msg = "(libev) system error";
544 740
545 if (syserr_cb) 741 if (syserr_cb)
546 syserr_cb (msg); 742 syserr_cb (msg);
547 else 743 else
548 { 744 {
549#if EV_AVOID_STDIO 745#if EV_AVOID_STDIO
550 const char *err = strerror (errno);
551
552 ev_printerr (msg); 746 ev_printerr (msg);
553 ev_printerr (": "); 747 ev_printerr (": ");
554 ev_printerr (err); 748 ev_printerr (strerror (errno));
555 ev_printerr ("\n"); 749 ev_printerr ("\n");
556#else 750#else
557 perror (msg); 751 perror (msg);
558#endif 752#endif
559 abort (); 753 abort ();
579#endif 773#endif
580} 774}
581 775
582static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 776static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
583 777
584void 778void ecb_cold
585ev_set_allocator (void *(*cb)(void *ptr, long size)) 779ev_set_allocator (void *(*cb)(void *ptr, long size))
586{ 780{
587 alloc = cb; 781 alloc = cb;
588} 782}
589 783
593 ptr = alloc (ptr, size); 787 ptr = alloc (ptr, size);
594 788
595 if (!ptr && size) 789 if (!ptr && size)
596 { 790 {
597#if EV_AVOID_STDIO 791#if EV_AVOID_STDIO
598 ev_printerr ("libev: memory allocation failed, aborting.\n"); 792 ev_printerr ("(libev) memory allocation failed, aborting.\n");
599#else 793#else
600 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 794 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
601#endif 795#endif
602 abort (); 796 abort ();
603 } 797 }
604 798
605 return ptr; 799 return ptr;
622 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 816 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
623 unsigned char unused; 817 unsigned char unused;
624#if EV_USE_EPOLL 818#if EV_USE_EPOLL
625 unsigned int egen; /* generation counter to counter epoll bugs */ 819 unsigned int egen; /* generation counter to counter epoll bugs */
626#endif 820#endif
627#if EV_SELECT_IS_WINSOCKET 821#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
628 SOCKET handle; 822 SOCKET handle;
823#endif
824#if EV_USE_IOCP
825 OVERLAPPED or, ow;
629#endif 826#endif
630} ANFD; 827} ANFD;
631 828
632/* stores the pending event set for a given watcher */ 829/* stores the pending event set for a given watcher */
633typedef struct 830typedef struct
698# define EV_RELEASE_CB (void)0 895# define EV_RELEASE_CB (void)0
699# define EV_ACQUIRE_CB (void)0 896# define EV_ACQUIRE_CB (void)0
700# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 897# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
701#endif 898#endif
702 899
703#define EVUNLOOP_RECURSE 0x80 900#define EVBREAK_RECURSE 0x80
704 901
705/*****************************************************************************/ 902/*****************************************************************************/
706 903
707#ifndef EV_HAVE_EV_TIME 904#ifndef EV_HAVE_EV_TIME
708ev_tstamp 905ev_tstamp
752 if (delay > 0.) 949 if (delay > 0.)
753 { 950 {
754#if EV_USE_NANOSLEEP 951#if EV_USE_NANOSLEEP
755 struct timespec ts; 952 struct timespec ts;
756 953
757 ts.tv_sec = (time_t)delay; 954 EV_TS_SET (ts, delay);
758 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
759
760 nanosleep (&ts, 0); 955 nanosleep (&ts, 0);
761#elif defined(_WIN32) 956#elif defined(_WIN32)
762 Sleep ((unsigned long)(delay * 1e3)); 957 Sleep ((unsigned long)(delay * 1e3));
763#else 958#else
764 struct timeval tv; 959 struct timeval tv;
765 960
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 */ 961 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770 /* something not guaranteed by newer posix versions, but guaranteed */ 962 /* something not guaranteed by newer posix versions, but guaranteed */
771 /* by older ones */ 963 /* by older ones */
964 EV_TV_SET (tv, delay);
772 select (0, 0, 0, 0, &tv); 965 select (0, 0, 0, 0, &tv);
773#endif 966#endif
774 } 967 }
775} 968}
776 969
777/*****************************************************************************/ 970/*****************************************************************************/
778 971
779#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 972#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
780 973
781/* find a suitable new size for the given array, */ 974/* find a suitable new size for the given array, */
782/* hopefully by rounding to a ncie-to-malloc size */ 975/* hopefully by rounding to a nice-to-malloc size */
783inline_size int 976inline_size int
784array_nextsize (int elem, int cur, int cnt) 977array_nextsize (int elem, int cur, int cnt)
785{ 978{
786 int ncur = cur + 1; 979 int ncur = cur + 1;
787 980
799 } 992 }
800 993
801 return ncur; 994 return ncur;
802} 995}
803 996
804static noinline void * 997static void * noinline ecb_cold
805array_realloc (int elem, void *base, int *cur, int cnt) 998array_realloc (int elem, void *base, int *cur, int cnt)
806{ 999{
807 *cur = array_nextsize (elem, *cur, cnt); 1000 *cur = array_nextsize (elem, *cur, cnt);
808 return ev_realloc (base, elem * *cur); 1001 return ev_realloc (base, elem * *cur);
809} 1002}
812 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1005 memset ((void *)(base), 0, sizeof (*(base)) * (count))
813 1006
814#define array_needsize(type,base,cur,cnt,init) \ 1007#define array_needsize(type,base,cur,cnt,init) \
815 if (expect_false ((cnt) > (cur))) \ 1008 if (expect_false ((cnt) > (cur))) \
816 { \ 1009 { \
817 int ocur_ = (cur); \ 1010 int ecb_unused ocur_ = (cur); \
818 (base) = (type *)array_realloc \ 1011 (base) = (type *)array_realloc \
819 (sizeof (type), (base), &(cur), (cnt)); \ 1012 (sizeof (type), (base), &(cur), (cnt)); \
820 init ((base) + (ocur_), (cur) - ocur_); \ 1013 init ((base) + (ocur_), (cur) - ocur_); \
821 } 1014 }
822 1015
922inline_size void 1115inline_size void
923fd_reify (EV_P) 1116fd_reify (EV_P)
924{ 1117{
925 int i; 1118 int i;
926 1119
1120#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1121 for (i = 0; i < fdchangecnt; ++i)
1122 {
1123 int fd = fdchanges [i];
1124 ANFD *anfd = anfds + fd;
1125
1126 if (anfd->reify & EV__IOFDSET && anfd->head)
1127 {
1128 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1129
1130 if (handle != anfd->handle)
1131 {
1132 unsigned long arg;
1133
1134 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1135
1136 /* handle changed, but fd didn't - we need to do it in two steps */
1137 backend_modify (EV_A_ fd, anfd->events, 0);
1138 anfd->events = 0;
1139 anfd->handle = handle;
1140 }
1141 }
1142 }
1143#endif
1144
927 for (i = 0; i < fdchangecnt; ++i) 1145 for (i = 0; i < fdchangecnt; ++i)
928 { 1146 {
929 int fd = fdchanges [i]; 1147 int fd = fdchanges [i];
930 ANFD *anfd = anfds + fd; 1148 ANFD *anfd = anfds + fd;
931 ev_io *w; 1149 ev_io *w;
932 1150
933 unsigned char events = 0; 1151 unsigned char o_events = anfd->events;
1152 unsigned char o_reify = anfd->reify;
934 1153
935 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1154 anfd->reify = 0;
936 events |= (unsigned char)w->events;
937 1155
938#if EV_SELECT_IS_WINSOCKET 1156 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
939 if (events)
940 { 1157 {
941 unsigned long arg; 1158 anfd->events = 0;
942 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1159
943 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1160 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1161 anfd->events |= (unsigned char)w->events;
1162
1163 if (o_events != anfd->events)
1164 o_reify = EV__IOFDSET; /* actually |= */
944 } 1165 }
945#endif
946 1166
947 { 1167 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); 1168 backend_modify (EV_A_ fd, o_events, anfd->events);
956 }
957 } 1169 }
958 1170
959 fdchangecnt = 0; 1171 fdchangecnt = 0;
960} 1172}
961 1173
973 fdchanges [fdchangecnt - 1] = fd; 1185 fdchanges [fdchangecnt - 1] = fd;
974 } 1186 }
975} 1187}
976 1188
977/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1189/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
978inline_speed void 1190inline_speed void ecb_cold
979fd_kill (EV_P_ int fd) 1191fd_kill (EV_P_ int fd)
980{ 1192{
981 ev_io *w; 1193 ev_io *w;
982 1194
983 while ((w = (ev_io *)anfds [fd].head)) 1195 while ((w = (ev_io *)anfds [fd].head))
986 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1198 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
987 } 1199 }
988} 1200}
989 1201
990/* check whether the given fd is actually valid, for error recovery */ 1202/* check whether the given fd is actually valid, for error recovery */
991inline_size int 1203inline_size int ecb_cold
992fd_valid (int fd) 1204fd_valid (int fd)
993{ 1205{
994#ifdef _WIN32 1206#ifdef _WIN32
995 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1207 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
996#else 1208#else
997 return fcntl (fd, F_GETFD) != -1; 1209 return fcntl (fd, F_GETFD) != -1;
998#endif 1210#endif
999} 1211}
1000 1212
1001/* called on EBADF to verify fds */ 1213/* called on EBADF to verify fds */
1002static void noinline 1214static void noinline ecb_cold
1003fd_ebadf (EV_P) 1215fd_ebadf (EV_P)
1004{ 1216{
1005 int fd; 1217 int fd;
1006 1218
1007 for (fd = 0; fd < anfdmax; ++fd) 1219 for (fd = 0; fd < anfdmax; ++fd)
1009 if (!fd_valid (fd) && errno == EBADF) 1221 if (!fd_valid (fd) && errno == EBADF)
1010 fd_kill (EV_A_ fd); 1222 fd_kill (EV_A_ fd);
1011} 1223}
1012 1224
1013/* called on ENOMEM in select/poll to kill some fds and retry */ 1225/* called on ENOMEM in select/poll to kill some fds and retry */
1014static void noinline 1226static void noinline ecb_cold
1015fd_enomem (EV_P) 1227fd_enomem (EV_P)
1016{ 1228{
1017 int fd; 1229 int fd;
1018 1230
1019 for (fd = anfdmax; fd--; ) 1231 for (fd = anfdmax; fd--; )
1054} 1266}
1055 1267
1056/*****************************************************************************/ 1268/*****************************************************************************/
1057 1269
1058/* 1270/*
1059 * the heap functions want a real array index. array index 0 uis guaranteed to not 1271 * 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 1272 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1061 * the branching factor of the d-tree. 1273 * the branching factor of the d-tree.
1062 */ 1274 */
1063 1275
1064/* 1276/*
1214 1426
1215/*****************************************************************************/ 1427/*****************************************************************************/
1216 1428
1217#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 1429#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1218 1430
1219static void noinline 1431static void noinline ecb_cold
1220evpipe_init (EV_P) 1432evpipe_init (EV_P)
1221{ 1433{
1222 if (!ev_is_active (&pipe_w)) 1434 if (!ev_is_active (&pipe_w))
1223 { 1435 {
1224# if EV_USE_EVENTFD 1436# if EV_USE_EVENTFD
1246 ev_io_start (EV_A_ &pipe_w); 1458 ev_io_start (EV_A_ &pipe_w);
1247 ev_unref (EV_A); /* watcher should not keep loop alive */ 1459 ev_unref (EV_A); /* watcher should not keep loop alive */
1248 } 1460 }
1249} 1461}
1250 1462
1251inline_size void 1463inline_speed void
1252evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1464evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253{ 1465{
1254 if (!*flag) 1466 if (expect_true (*flag))
1467 return;
1468
1469 *flag = 1;
1470
1471 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1472
1473 pipe_write_skipped = 1;
1474
1475 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1476
1477 if (pipe_write_wanted)
1255 { 1478 {
1479 int old_errno;
1480
1481 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1482
1256 int old_errno = errno; /* save errno because write might clobber it */ 1483 old_errno = errno; /* save errno because write will clobber it */
1257 char dummy;
1258
1259 *flag = 1;
1260 1484
1261#if EV_USE_EVENTFD 1485#if EV_USE_EVENTFD
1262 if (evfd >= 0) 1486 if (evfd >= 0)
1263 { 1487 {
1264 uint64_t counter = 1; 1488 uint64_t counter = 1;
1265 write (evfd, &counter, sizeof (uint64_t)); 1489 write (evfd, &counter, sizeof (uint64_t));
1266 } 1490 }
1267 else 1491 else
1268#endif 1492#endif
1493 {
1494 /* win32 people keep sending patches that change this write() to send() */
1495 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1496 /* so when you think this write should be a send instead, please find out */
1497 /* where your send() is from - it's definitely not the microsoft send, and */
1498 /* tell me. thank you. */
1269 write (evpipe [1], &dummy, 1); 1499 write (evpipe [1], &(evpipe [1]), 1);
1500 }
1270 1501
1271 errno = old_errno; 1502 errno = old_errno;
1272 } 1503 }
1273} 1504}
1274 1505
1277static void 1508static void
1278pipecb (EV_P_ ev_io *iow, int revents) 1509pipecb (EV_P_ ev_io *iow, int revents)
1279{ 1510{
1280 int i; 1511 int i;
1281 1512
1513 if (revents & EV_READ)
1514 {
1282#if EV_USE_EVENTFD 1515#if EV_USE_EVENTFD
1283 if (evfd >= 0) 1516 if (evfd >= 0)
1284 { 1517 {
1285 uint64_t counter; 1518 uint64_t counter;
1286 read (evfd, &counter, sizeof (uint64_t)); 1519 read (evfd, &counter, sizeof (uint64_t));
1287 } 1520 }
1288 else 1521 else
1289#endif 1522#endif
1290 { 1523 {
1291 char dummy; 1524 char dummy;
1525 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1292 read (evpipe [0], &dummy, 1); 1526 read (evpipe [0], &dummy, 1);
1527 }
1293 } 1528 }
1294 1529
1530 pipe_write_skipped = 0;
1531
1532#if EV_SIGNAL_ENABLE
1295 if (sig_pending) 1533 if (sig_pending)
1296 { 1534 {
1297 sig_pending = 0; 1535 sig_pending = 0;
1298 1536
1299 for (i = EV_NSIG - 1; i--; ) 1537 for (i = EV_NSIG - 1; i--; )
1300 if (expect_false (signals [i].pending)) 1538 if (expect_false (signals [i].pending))
1301 ev_feed_signal_event (EV_A_ i + 1); 1539 ev_feed_signal_event (EV_A_ i + 1);
1302 } 1540 }
1541#endif
1303 1542
1304#if EV_ASYNC_ENABLE 1543#if EV_ASYNC_ENABLE
1305 if (async_pending) 1544 if (async_pending)
1306 { 1545 {
1307 async_pending = 0; 1546 async_pending = 0;
1316#endif 1555#endif
1317} 1556}
1318 1557
1319/*****************************************************************************/ 1558/*****************************************************************************/
1320 1559
1560void
1561ev_feed_signal (int signum)
1562{
1563#if EV_MULTIPLICITY
1564 EV_P = signals [signum - 1].loop;
1565
1566 if (!EV_A)
1567 return;
1568#endif
1569
1570 if (!ev_active (&pipe_w))
1571 return;
1572
1573 signals [signum - 1].pending = 1;
1574 evpipe_write (EV_A_ &sig_pending);
1575}
1576
1321static void 1577static void
1322ev_sighandler (int signum) 1578ev_sighandler (int signum)
1323{ 1579{
1324#if EV_MULTIPLICITY
1325 EV_P = signals [signum - 1].loop;
1326#endif
1327
1328#ifdef _WIN32 1580#ifdef _WIN32
1329 signal (signum, ev_sighandler); 1581 signal (signum, ev_sighandler);
1330#endif 1582#endif
1331 1583
1332 signals [signum - 1].pending = 1; 1584 ev_feed_signal (signum);
1333 evpipe_write (EV_A_ &sig_pending);
1334} 1585}
1335 1586
1336void noinline 1587void noinline
1337ev_feed_signal_event (EV_P_ int signum) 1588ev_feed_signal_event (EV_P_ int signum)
1338{ 1589{
1438 1689
1439#endif 1690#endif
1440 1691
1441/*****************************************************************************/ 1692/*****************************************************************************/
1442 1693
1694#if EV_USE_IOCP
1695# include "ev_iocp.c"
1696#endif
1443#if EV_USE_PORT 1697#if EV_USE_PORT
1444# include "ev_port.c" 1698# include "ev_port.c"
1445#endif 1699#endif
1446#if EV_USE_KQUEUE 1700#if EV_USE_KQUEUE
1447# include "ev_kqueue.c" 1701# include "ev_kqueue.c"
1454#endif 1708#endif
1455#if EV_USE_SELECT 1709#if EV_USE_SELECT
1456# include "ev_select.c" 1710# include "ev_select.c"
1457#endif 1711#endif
1458 1712
1459int 1713int ecb_cold
1460ev_version_major (void) 1714ev_version_major (void)
1461{ 1715{
1462 return EV_VERSION_MAJOR; 1716 return EV_VERSION_MAJOR;
1463} 1717}
1464 1718
1465int 1719int ecb_cold
1466ev_version_minor (void) 1720ev_version_minor (void)
1467{ 1721{
1468 return EV_VERSION_MINOR; 1722 return EV_VERSION_MINOR;
1469} 1723}
1470 1724
1471/* return true if we are running with elevated privileges and should ignore env variables */ 1725/* return true if we are running with elevated privileges and should ignore env variables */
1472int inline_size 1726int inline_size ecb_cold
1473enable_secure (void) 1727enable_secure (void)
1474{ 1728{
1475#ifdef _WIN32 1729#ifdef _WIN32
1476 return 0; 1730 return 0;
1477#else 1731#else
1478 return getuid () != geteuid () 1732 return getuid () != geteuid ()
1479 || getgid () != getegid (); 1733 || getgid () != getegid ();
1480#endif 1734#endif
1481} 1735}
1482 1736
1483unsigned int 1737unsigned int ecb_cold
1484ev_supported_backends (void) 1738ev_supported_backends (void)
1485{ 1739{
1486 unsigned int flags = 0; 1740 unsigned int flags = 0;
1487 1741
1488 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1742 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1492 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1746 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1493 1747
1494 return flags; 1748 return flags;
1495} 1749}
1496 1750
1497unsigned int 1751unsigned int ecb_cold
1498ev_recommended_backends (void) 1752ev_recommended_backends (void)
1499{ 1753{
1500 unsigned int flags = ev_supported_backends (); 1754 unsigned int flags = ev_supported_backends ();
1501 1755
1502#ifndef __NetBSD__ 1756#ifndef __NetBSD__
1507#ifdef __APPLE__ 1761#ifdef __APPLE__
1508 /* only select works correctly on that "unix-certified" platform */ 1762 /* only select works correctly on that "unix-certified" platform */
1509 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 1763 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1510 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 1764 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1511#endif 1765#endif
1766#ifdef __FreeBSD__
1767 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1768#endif
1512 1769
1513 return flags; 1770 return flags;
1514} 1771}
1515 1772
1516unsigned int 1773unsigned int ecb_cold
1517ev_embeddable_backends (void) 1774ev_embeddable_backends (void)
1518{ 1775{
1519 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1776 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1520 1777
1521 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1778 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1522 /* please fix it and tell me how to detect the fix */ 1779 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1523 flags &= ~EVBACKEND_EPOLL; 1780 flags &= ~EVBACKEND_EPOLL;
1524 1781
1525 return flags; 1782 return flags;
1526} 1783}
1527 1784
1528unsigned int 1785unsigned int
1531 return backend; 1788 return backend;
1532} 1789}
1533 1790
1534#if EV_FEATURE_API 1791#if EV_FEATURE_API
1535unsigned int 1792unsigned int
1536ev_loop_count (EV_P) 1793ev_iteration (EV_P)
1537{ 1794{
1538 return loop_count; 1795 return loop_count;
1539} 1796}
1540 1797
1541unsigned int 1798unsigned int
1542ev_loop_depth (EV_P) 1799ev_depth (EV_P)
1543{ 1800{
1544 return loop_depth; 1801 return loop_depth;
1545} 1802}
1546 1803
1547void 1804void
1566ev_userdata (EV_P) 1823ev_userdata (EV_P)
1567{ 1824{
1568 return userdata; 1825 return userdata;
1569} 1826}
1570 1827
1828void
1571void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 1829ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1572{ 1830{
1573 invoke_cb = invoke_pending_cb; 1831 invoke_cb = invoke_pending_cb;
1574} 1832}
1575 1833
1834void
1576void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 1835ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1577{ 1836{
1578 release_cb = release; 1837 release_cb = release;
1579 acquire_cb = acquire; 1838 acquire_cb = acquire;
1580} 1839}
1581#endif 1840#endif
1582 1841
1583/* initialise a loop structure, must be zero-initialised */ 1842/* initialise a loop structure, must be zero-initialised */
1584static void noinline 1843static void noinline ecb_cold
1585loop_init (EV_P_ unsigned int flags) 1844loop_init (EV_P_ unsigned int flags)
1586{ 1845{
1587 if (!backend) 1846 if (!backend)
1588 { 1847 {
1848 origflags = flags;
1849
1589#if EV_USE_REALTIME 1850#if EV_USE_REALTIME
1590 if (!have_realtime) 1851 if (!have_realtime)
1591 { 1852 {
1592 struct timespec ts; 1853 struct timespec ts;
1593 1854
1615 if (!(flags & EVFLAG_NOENV) 1876 if (!(flags & EVFLAG_NOENV)
1616 && !enable_secure () 1877 && !enable_secure ()
1617 && getenv ("LIBEV_FLAGS")) 1878 && getenv ("LIBEV_FLAGS"))
1618 flags = atoi (getenv ("LIBEV_FLAGS")); 1879 flags = atoi (getenv ("LIBEV_FLAGS"));
1619 1880
1620 ev_rt_now = ev_time (); 1881 ev_rt_now = ev_time ();
1621 mn_now = get_clock (); 1882 mn_now = get_clock ();
1622 now_floor = mn_now; 1883 now_floor = mn_now;
1623 rtmn_diff = ev_rt_now - mn_now; 1884 rtmn_diff = ev_rt_now - mn_now;
1624#if EV_FEATURE_API 1885#if EV_FEATURE_API
1625 invoke_cb = ev_invoke_pending; 1886 invoke_cb = ev_invoke_pending;
1626#endif 1887#endif
1627 1888
1628 io_blocktime = 0.; 1889 io_blocktime = 0.;
1629 timeout_blocktime = 0.; 1890 timeout_blocktime = 0.;
1630 backend = 0; 1891 backend = 0;
1631 backend_fd = -1; 1892 backend_fd = -1;
1632 sig_pending = 0; 1893 sig_pending = 0;
1633#if EV_ASYNC_ENABLE 1894#if EV_ASYNC_ENABLE
1634 async_pending = 0; 1895 async_pending = 0;
1635#endif 1896#endif
1897 pipe_write_skipped = 0;
1898 pipe_write_wanted = 0;
1636#if EV_USE_INOTIFY 1899#if EV_USE_INOTIFY
1637 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 1900 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1638#endif 1901#endif
1639#if EV_USE_SIGNALFD 1902#if EV_USE_SIGNALFD
1640 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1903 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1641#endif 1904#endif
1642 1905
1643 if (!(flags & 0x0000ffffU)) 1906 if (!(flags & EVBACKEND_MASK))
1644 flags |= ev_recommended_backends (); 1907 flags |= ev_recommended_backends ();
1645 1908
1909#if EV_USE_IOCP
1910 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1911#endif
1646#if EV_USE_PORT 1912#if EV_USE_PORT
1647 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1913 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1648#endif 1914#endif
1649#if EV_USE_KQUEUE 1915#if EV_USE_KQUEUE
1650 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1916 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1667#endif 1933#endif
1668 } 1934 }
1669} 1935}
1670 1936
1671/* free up a loop structure */ 1937/* free up a loop structure */
1672static void noinline 1938void ecb_cold
1673loop_destroy (EV_P) 1939ev_loop_destroy (EV_P)
1674{ 1940{
1675 int i; 1941 int i;
1942
1943#if EV_MULTIPLICITY
1944 /* mimic free (0) */
1945 if (!EV_A)
1946 return;
1947#endif
1948
1949#if EV_CLEANUP_ENABLE
1950 /* queue cleanup watchers (and execute them) */
1951 if (expect_false (cleanupcnt))
1952 {
1953 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1954 EV_INVOKE_PENDING;
1955 }
1956#endif
1957
1958#if EV_CHILD_ENABLE
1959 if (ev_is_active (&childev))
1960 {
1961 ev_ref (EV_A); /* child watcher */
1962 ev_signal_stop (EV_A_ &childev);
1963 }
1964#endif
1676 1965
1677 if (ev_is_active (&pipe_w)) 1966 if (ev_is_active (&pipe_w))
1678 { 1967 {
1679 /*ev_ref (EV_A);*/ 1968 /*ev_ref (EV_A);*/
1680 /*ev_io_stop (EV_A_ &pipe_w);*/ 1969 /*ev_io_stop (EV_A_ &pipe_w);*/
1702#endif 1991#endif
1703 1992
1704 if (backend_fd >= 0) 1993 if (backend_fd >= 0)
1705 close (backend_fd); 1994 close (backend_fd);
1706 1995
1996#if EV_USE_IOCP
1997 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1998#endif
1707#if EV_USE_PORT 1999#if EV_USE_PORT
1708 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2000 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1709#endif 2001#endif
1710#if EV_USE_KQUEUE 2002#if EV_USE_KQUEUE
1711 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2003 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1738 array_free (periodic, EMPTY); 2030 array_free (periodic, EMPTY);
1739#endif 2031#endif
1740#if EV_FORK_ENABLE 2032#if EV_FORK_ENABLE
1741 array_free (fork, EMPTY); 2033 array_free (fork, EMPTY);
1742#endif 2034#endif
2035#if EV_CLEANUP_ENABLE
2036 array_free (cleanup, EMPTY);
2037#endif
1743 array_free (prepare, EMPTY); 2038 array_free (prepare, EMPTY);
1744 array_free (check, EMPTY); 2039 array_free (check, EMPTY);
1745#if EV_ASYNC_ENABLE 2040#if EV_ASYNC_ENABLE
1746 array_free (async, EMPTY); 2041 array_free (async, EMPTY);
1747#endif 2042#endif
1748 2043
1749 backend = 0; 2044 backend = 0;
2045
2046#if EV_MULTIPLICITY
2047 if (ev_is_default_loop (EV_A))
2048#endif
2049 ev_default_loop_ptr = 0;
2050#if EV_MULTIPLICITY
2051 else
2052 ev_free (EV_A);
2053#endif
1750} 2054}
1751 2055
1752#if EV_USE_INOTIFY 2056#if EV_USE_INOTIFY
1753inline_size void infy_fork (EV_P); 2057inline_size void infy_fork (EV_P);
1754#endif 2058#endif
1769 infy_fork (EV_A); 2073 infy_fork (EV_A);
1770#endif 2074#endif
1771 2075
1772 if (ev_is_active (&pipe_w)) 2076 if (ev_is_active (&pipe_w))
1773 { 2077 {
1774 /* this "locks" the handlers against writing to the pipe */ 2078 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1775 /* while we modify the fd vars */
1776 sig_pending = 1;
1777#if EV_ASYNC_ENABLE
1778 async_pending = 1;
1779#endif
1780 2079
1781 ev_ref (EV_A); 2080 ev_ref (EV_A);
1782 ev_io_stop (EV_A_ &pipe_w); 2081 ev_io_stop (EV_A_ &pipe_w);
1783 2082
1784#if EV_USE_EVENTFD 2083#if EV_USE_EVENTFD
1802 postfork = 0; 2101 postfork = 0;
1803} 2102}
1804 2103
1805#if EV_MULTIPLICITY 2104#if EV_MULTIPLICITY
1806 2105
1807struct ev_loop * 2106struct ev_loop * ecb_cold
1808ev_loop_new (unsigned int flags) 2107ev_loop_new (unsigned int flags)
1809{ 2108{
1810 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2109 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1811 2110
1812 memset (EV_A, 0, sizeof (struct ev_loop)); 2111 memset (EV_A, 0, sizeof (struct ev_loop));
1813 loop_init (EV_A_ flags); 2112 loop_init (EV_A_ flags);
1814 2113
1815 if (ev_backend (EV_A)) 2114 if (ev_backend (EV_A))
1816 return EV_A; 2115 return EV_A;
1817 2116
2117 ev_free (EV_A);
1818 return 0; 2118 return 0;
1819} 2119}
1820 2120
1821void
1822ev_loop_destroy (EV_P)
1823{
1824 loop_destroy (EV_A);
1825 ev_free (loop);
1826}
1827
1828void
1829ev_loop_fork (EV_P)
1830{
1831 postfork = 1; /* must be in line with ev_default_fork */
1832}
1833#endif /* multiplicity */ 2121#endif /* multiplicity */
1834 2122
1835#if EV_VERIFY 2123#if EV_VERIFY
1836static void noinline 2124static void noinline ecb_cold
1837verify_watcher (EV_P_ W w) 2125verify_watcher (EV_P_ W w)
1838{ 2126{
1839 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2127 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1840 2128
1841 if (w->pending) 2129 if (w->pending)
1842 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2130 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1843} 2131}
1844 2132
1845static void noinline 2133static void noinline ecb_cold
1846verify_heap (EV_P_ ANHE *heap, int N) 2134verify_heap (EV_P_ ANHE *heap, int N)
1847{ 2135{
1848 int i; 2136 int i;
1849 2137
1850 for (i = HEAP0; i < N + HEAP0; ++i) 2138 for (i = HEAP0; i < N + HEAP0; ++i)
1855 2143
1856 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2144 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1857 } 2145 }
1858} 2146}
1859 2147
1860static void noinline 2148static void noinline ecb_cold
1861array_verify (EV_P_ W *ws, int cnt) 2149array_verify (EV_P_ W *ws, int cnt)
1862{ 2150{
1863 while (cnt--) 2151 while (cnt--)
1864 { 2152 {
1865 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2153 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1867 } 2155 }
1868} 2156}
1869#endif 2157#endif
1870 2158
1871#if EV_FEATURE_API 2159#if EV_FEATURE_API
1872void 2160void ecb_cold
1873ev_loop_verify (EV_P) 2161ev_verify (EV_P)
1874{ 2162{
1875#if EV_VERIFY 2163#if EV_VERIFY
1876 int i; 2164 int i;
1877 WL w; 2165 WL w;
1878 2166
1912#if EV_FORK_ENABLE 2200#if EV_FORK_ENABLE
1913 assert (forkmax >= forkcnt); 2201 assert (forkmax >= forkcnt);
1914 array_verify (EV_A_ (W *)forks, forkcnt); 2202 array_verify (EV_A_ (W *)forks, forkcnt);
1915#endif 2203#endif
1916 2204
2205#if EV_CLEANUP_ENABLE
2206 assert (cleanupmax >= cleanupcnt);
2207 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2208#endif
2209
1917#if EV_ASYNC_ENABLE 2210#if EV_ASYNC_ENABLE
1918 assert (asyncmax >= asynccnt); 2211 assert (asyncmax >= asynccnt);
1919 array_verify (EV_A_ (W *)asyncs, asynccnt); 2212 array_verify (EV_A_ (W *)asyncs, asynccnt);
1920#endif 2213#endif
1921 2214
1938#endif 2231#endif
1939} 2232}
1940#endif 2233#endif
1941 2234
1942#if EV_MULTIPLICITY 2235#if EV_MULTIPLICITY
1943struct ev_loop * 2236struct ev_loop * ecb_cold
1944ev_default_loop_init (unsigned int flags)
1945#else 2237#else
1946int 2238int
2239#endif
1947ev_default_loop (unsigned int flags) 2240ev_default_loop (unsigned int flags)
1948#endif
1949{ 2241{
1950 if (!ev_default_loop_ptr) 2242 if (!ev_default_loop_ptr)
1951 { 2243 {
1952#if EV_MULTIPLICITY 2244#if EV_MULTIPLICITY
1953 EV_P = ev_default_loop_ptr = &default_loop_struct; 2245 EV_P = ev_default_loop_ptr = &default_loop_struct;
1972 2264
1973 return ev_default_loop_ptr; 2265 return ev_default_loop_ptr;
1974} 2266}
1975 2267
1976void 2268void
1977ev_default_destroy (void) 2269ev_loop_fork (EV_P)
1978{ 2270{
1979#if EV_MULTIPLICITY
1980 EV_P = ev_default_loop_ptr;
1981#endif
1982
1983 ev_default_loop_ptr = 0;
1984
1985#if EV_CHILD_ENABLE
1986 ev_ref (EV_A); /* child watcher */
1987 ev_signal_stop (EV_A_ &childev);
1988#endif
1989
1990 loop_destroy (EV_A);
1991}
1992
1993void
1994ev_default_fork (void)
1995{
1996#if EV_MULTIPLICITY
1997 EV_P = ev_default_loop_ptr;
1998#endif
1999
2000 postfork = 1; /* must be in line with ev_loop_fork */ 2271 postfork = 1; /* must be in line with ev_default_fork */
2001} 2272}
2002 2273
2003/*****************************************************************************/ 2274/*****************************************************************************/
2004 2275
2005void 2276void
2027 2298
2028 for (pri = NUMPRI; pri--; ) 2299 for (pri = NUMPRI; pri--; )
2029 while (pendingcnt [pri]) 2300 while (pendingcnt [pri])
2030 { 2301 {
2031 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2302 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2032
2033 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2034 /* ^ this is no longer true, as pending_w could be here */
2035 2303
2036 p->w->pending = 0; 2304 p->w->pending = 0;
2037 EV_CB_INVOKE (p->w, p->events); 2305 EV_CB_INVOKE (p->w, p->events);
2038 EV_FREQUENT_CHECK; 2306 EV_FREQUENT_CHECK;
2039 } 2307 }
2096 EV_FREQUENT_CHECK; 2364 EV_FREQUENT_CHECK;
2097 feed_reverse (EV_A_ (W)w); 2365 feed_reverse (EV_A_ (W)w);
2098 } 2366 }
2099 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2367 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2100 2368
2101 feed_reverse_done (EV_A_ EV_TIMEOUT); 2369 feed_reverse_done (EV_A_ EV_TIMER);
2102 } 2370 }
2103} 2371}
2104 2372
2105#if EV_PERIODIC_ENABLE 2373#if EV_PERIODIC_ENABLE
2374
2375static void noinline
2376periodic_recalc (EV_P_ ev_periodic *w)
2377{
2378 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2379 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2380
2381 /* the above almost always errs on the low side */
2382 while (at <= ev_rt_now)
2383 {
2384 ev_tstamp nat = at + w->interval;
2385
2386 /* when resolution fails us, we use ev_rt_now */
2387 if (expect_false (nat == at))
2388 {
2389 at = ev_rt_now;
2390 break;
2391 }
2392
2393 at = nat;
2394 }
2395
2396 ev_at (w) = at;
2397}
2398
2106/* make periodics pending */ 2399/* make periodics pending */
2107inline_size void 2400inline_size void
2108periodics_reify (EV_P) 2401periodics_reify (EV_P)
2109{ 2402{
2110 EV_FREQUENT_CHECK; 2403 EV_FREQUENT_CHECK;
2129 ANHE_at_cache (periodics [HEAP0]); 2422 ANHE_at_cache (periodics [HEAP0]);
2130 downheap (periodics, periodiccnt, HEAP0); 2423 downheap (periodics, periodiccnt, HEAP0);
2131 } 2424 }
2132 else if (w->interval) 2425 else if (w->interval)
2133 { 2426 {
2134 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2427 periodic_recalc (EV_A_ w);
2135 /* if next trigger time is not sufficiently in the future, put it there */
2136 /* this might happen because of floating point inexactness */
2137 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2138 {
2139 ev_at (w) += w->interval;
2140
2141 /* if interval is unreasonably low we might still have a time in the past */
2142 /* so correct this. this will make the periodic very inexact, but the user */
2143 /* has effectively asked to get triggered more often than possible */
2144 if (ev_at (w) < ev_rt_now)
2145 ev_at (w) = ev_rt_now;
2146 }
2147
2148 ANHE_at_cache (periodics [HEAP0]); 2428 ANHE_at_cache (periodics [HEAP0]);
2149 downheap (periodics, periodiccnt, HEAP0); 2429 downheap (periodics, periodiccnt, HEAP0);
2150 } 2430 }
2151 else 2431 else
2152 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2432 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2159 feed_reverse_done (EV_A_ EV_PERIODIC); 2439 feed_reverse_done (EV_A_ EV_PERIODIC);
2160 } 2440 }
2161} 2441}
2162 2442
2163/* simply recalculate all periodics */ 2443/* simply recalculate all periodics */
2164/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2444/* TODO: maybe ensure that at least one event happens when jumping forward? */
2165static void noinline 2445static void noinline ecb_cold
2166periodics_reschedule (EV_P) 2446periodics_reschedule (EV_P)
2167{ 2447{
2168 int i; 2448 int i;
2169 2449
2170 /* adjust periodics after time jump */ 2450 /* adjust periodics after time jump */
2173 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2453 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2174 2454
2175 if (w->reschedule_cb) 2455 if (w->reschedule_cb)
2176 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2456 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2177 else if (w->interval) 2457 else if (w->interval)
2178 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2458 periodic_recalc (EV_A_ w);
2179 2459
2180 ANHE_at_cache (periodics [i]); 2460 ANHE_at_cache (periodics [i]);
2181 } 2461 }
2182 2462
2183 reheap (periodics, periodiccnt); 2463 reheap (periodics, periodiccnt);
2184} 2464}
2185#endif 2465#endif
2186 2466
2187/* adjust all timers by a given offset */ 2467/* adjust all timers by a given offset */
2188static void noinline 2468static void noinline ecb_cold
2189timers_reschedule (EV_P_ ev_tstamp adjust) 2469timers_reschedule (EV_P_ ev_tstamp adjust)
2190{ 2470{
2191 int i; 2471 int i;
2192 2472
2193 for (i = 0; i < timercnt; ++i) 2473 for (i = 0; i < timercnt; ++i)
2230 * doesn't hurt either as we only do this on time-jumps or 2510 * doesn't hurt either as we only do this on time-jumps or
2231 * in the unlikely event of having been preempted here. 2511 * in the unlikely event of having been preempted here.
2232 */ 2512 */
2233 for (i = 4; --i; ) 2513 for (i = 4; --i; )
2234 { 2514 {
2515 ev_tstamp diff;
2235 rtmn_diff = ev_rt_now - mn_now; 2516 rtmn_diff = ev_rt_now - mn_now;
2236 2517
2518 diff = odiff - rtmn_diff;
2519
2237 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2520 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2238 return; /* all is well */ 2521 return; /* all is well */
2239 2522
2240 ev_rt_now = ev_time (); 2523 ev_rt_now = ev_time ();
2241 mn_now = get_clock (); 2524 mn_now = get_clock ();
2242 now_floor = mn_now; 2525 now_floor = mn_now;
2265 mn_now = ev_rt_now; 2548 mn_now = ev_rt_now;
2266 } 2549 }
2267} 2550}
2268 2551
2269void 2552void
2270ev_loop (EV_P_ int flags) 2553ev_run (EV_P_ int flags)
2271{ 2554{
2272#if EV_FEATURE_API 2555#if EV_FEATURE_API
2273 ++loop_depth; 2556 ++loop_depth;
2274#endif 2557#endif
2275 2558
2276 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2559 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2277 2560
2278 loop_done = EVUNLOOP_CANCEL; 2561 loop_done = EVBREAK_CANCEL;
2279 2562
2280 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2563 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2281 2564
2282 do 2565 do
2283 { 2566 {
2284#if EV_VERIFY >= 2 2567#if EV_VERIFY >= 2
2285 ev_loop_verify (EV_A); 2568 ev_verify (EV_A);
2286#endif 2569#endif
2287 2570
2288#ifndef _WIN32 2571#ifndef _WIN32
2289 if (expect_false (curpid)) /* penalise the forking check even more */ 2572 if (expect_false (curpid)) /* penalise the forking check even more */
2290 if (expect_false (getpid () != curpid)) 2573 if (expect_false (getpid () != curpid))
2326 /* calculate blocking time */ 2609 /* calculate blocking time */
2327 { 2610 {
2328 ev_tstamp waittime = 0.; 2611 ev_tstamp waittime = 0.;
2329 ev_tstamp sleeptime = 0.; 2612 ev_tstamp sleeptime = 0.;
2330 2613
2614 /* remember old timestamp for io_blocktime calculation */
2615 ev_tstamp prev_mn_now = mn_now;
2616
2617 /* update time to cancel out callback processing overhead */
2618 time_update (EV_A_ 1e100);
2619
2620 /* from now on, we want a pipe-wake-up */
2621 pipe_write_wanted = 1;
2622
2623 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2624
2331 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2625 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2332 { 2626 {
2333 /* remember old timestamp for io_blocktime calculation */
2334 ev_tstamp prev_mn_now = mn_now;
2335
2336 /* update time to cancel out callback processing overhead */
2337 time_update (EV_A_ 1e100);
2338
2339 waittime = MAX_BLOCKTIME; 2627 waittime = MAX_BLOCKTIME;
2340 2628
2341 if (timercnt) 2629 if (timercnt)
2342 { 2630 {
2343 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2631 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2344 if (waittime > to) waittime = to; 2632 if (waittime > to) waittime = to;
2345 } 2633 }
2346 2634
2347#if EV_PERIODIC_ENABLE 2635#if EV_PERIODIC_ENABLE
2348 if (periodiccnt) 2636 if (periodiccnt)
2349 { 2637 {
2350 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2638 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2351 if (waittime > to) waittime = to; 2639 if (waittime > to) waittime = to;
2352 } 2640 }
2353#endif 2641#endif
2354 2642
2355 /* don't let timeouts decrease the waittime below timeout_blocktime */ 2643 /* don't let timeouts decrease the waittime below timeout_blocktime */
2356 if (expect_false (waittime < timeout_blocktime)) 2644 if (expect_false (waittime < timeout_blocktime))
2357 waittime = timeout_blocktime; 2645 waittime = timeout_blocktime;
2646
2647 /* at this point, we NEED to wait, so we have to ensure */
2648 /* to pass a minimum nonzero value to the backend */
2649 if (expect_false (waittime < backend_mintime))
2650 waittime = backend_mintime;
2358 2651
2359 /* extra check because io_blocktime is commonly 0 */ 2652 /* extra check because io_blocktime is commonly 0 */
2360 if (expect_false (io_blocktime)) 2653 if (expect_false (io_blocktime))
2361 { 2654 {
2362 sleeptime = io_blocktime - (mn_now - prev_mn_now); 2655 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2363 2656
2364 if (sleeptime > waittime - backend_fudge) 2657 if (sleeptime > waittime - backend_mintime)
2365 sleeptime = waittime - backend_fudge; 2658 sleeptime = waittime - backend_mintime;
2366 2659
2367 if (expect_true (sleeptime > 0.)) 2660 if (expect_true (sleeptime > 0.))
2368 { 2661 {
2369 ev_sleep (sleeptime); 2662 ev_sleep (sleeptime);
2370 waittime -= sleeptime; 2663 waittime -= sleeptime;
2373 } 2666 }
2374 2667
2375#if EV_FEATURE_API 2668#if EV_FEATURE_API
2376 ++loop_count; 2669 ++loop_count;
2377#endif 2670#endif
2378 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 2671 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2379 backend_poll (EV_A_ waittime); 2672 backend_poll (EV_A_ waittime);
2380 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 2673 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2674
2675 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2676
2677 if (pipe_write_skipped)
2678 {
2679 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2680 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2681 }
2682
2381 2683
2382 /* update ev_rt_now, do magic */ 2684 /* update ev_rt_now, do magic */
2383 time_update (EV_A_ waittime + sleeptime); 2685 time_update (EV_A_ waittime + sleeptime);
2384 } 2686 }
2385 2687
2403 EV_INVOKE_PENDING; 2705 EV_INVOKE_PENDING;
2404 } 2706 }
2405 while (expect_true ( 2707 while (expect_true (
2406 activecnt 2708 activecnt
2407 && !loop_done 2709 && !loop_done
2408 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2710 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2409 )); 2711 ));
2410 2712
2411 if (loop_done == EVUNLOOP_ONE) 2713 if (loop_done == EVBREAK_ONE)
2412 loop_done = EVUNLOOP_CANCEL; 2714 loop_done = EVBREAK_CANCEL;
2413 2715
2414#if EV_FEATURE_API 2716#if EV_FEATURE_API
2415 --loop_depth; 2717 --loop_depth;
2416#endif 2718#endif
2417} 2719}
2418 2720
2419void 2721void
2420ev_unloop (EV_P_ int how) 2722ev_break (EV_P_ int how)
2421{ 2723{
2422 loop_done = how; 2724 loop_done = how;
2423} 2725}
2424 2726
2425void 2727void
2573 EV_FREQUENT_CHECK; 2875 EV_FREQUENT_CHECK;
2574 2876
2575 wlist_del (&anfds[w->fd].head, (WL)w); 2877 wlist_del (&anfds[w->fd].head, (WL)w);
2576 ev_stop (EV_A_ (W)w); 2878 ev_stop (EV_A_ (W)w);
2577 2879
2578 fd_change (EV_A_ w->fd, 1); 2880 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2579 2881
2580 EV_FREQUENT_CHECK; 2882 EV_FREQUENT_CHECK;
2581} 2883}
2582 2884
2583void noinline 2885void noinline
2675 if (w->reschedule_cb) 2977 if (w->reschedule_cb)
2676 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2978 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2677 else if (w->interval) 2979 else if (w->interval)
2678 { 2980 {
2679 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 2981 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2680 /* this formula differs from the one in periodic_reify because we do not always round up */ 2982 periodic_recalc (EV_A_ w);
2681 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2682 } 2983 }
2683 else 2984 else
2684 ev_at (w) = w->offset; 2985 ev_at (w) = w->offset;
2685 2986
2686 EV_FREQUENT_CHECK; 2987 EV_FREQUENT_CHECK;
2807 sa.sa_handler = ev_sighandler; 3108 sa.sa_handler = ev_sighandler;
2808 sigfillset (&sa.sa_mask); 3109 sigfillset (&sa.sa_mask);
2809 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3110 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2810 sigaction (w->signum, &sa, 0); 3111 sigaction (w->signum, &sa, 0);
2811 3112
3113 if (origflags & EVFLAG_NOSIGMASK)
3114 {
2812 sigemptyset (&sa.sa_mask); 3115 sigemptyset (&sa.sa_mask);
2813 sigaddset (&sa.sa_mask, w->signum); 3116 sigaddset (&sa.sa_mask, w->signum);
2814 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3117 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3118 }
2815#endif 3119#endif
2816 } 3120 }
2817 3121
2818 EV_FREQUENT_CHECK; 3122 EV_FREQUENT_CHECK;
2819} 3123}
2960 if (!pend || pend == path) 3264 if (!pend || pend == path)
2961 break; 3265 break;
2962 3266
2963 *pend = 0; 3267 *pend = 0;
2964 w->wd = inotify_add_watch (fs_fd, path, mask); 3268 w->wd = inotify_add_watch (fs_fd, path, mask);
2965 } 3269 }
2966 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3270 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2967 } 3271 }
2968 } 3272 }
2969 3273
2970 if (w->wd >= 0) 3274 if (w->wd >= 0)
3037 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3341 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3038 ofs += sizeof (struct inotify_event) + ev->len; 3342 ofs += sizeof (struct inotify_event) + ev->len;
3039 } 3343 }
3040} 3344}
3041 3345
3042inline_size unsigned int
3043ev_linux_version (void)
3044{
3045 struct utsname buf;
3046 unsigned int v;
3047 int i;
3048 char *p = buf.release;
3049
3050 if (uname (&buf))
3051 return 0;
3052
3053 for (i = 3+1; --i; )
3054 {
3055 unsigned int c = 0;
3056
3057 for (;;)
3058 {
3059 if (*p >= '0' && *p <= '9')
3060 c = c * 10 + *p++ - '0';
3061 else
3062 {
3063 p += *p == '.';
3064 break;
3065 }
3066 }
3067
3068 v = (v << 8) | c;
3069 }
3070
3071 return v;
3072}
3073
3074inline_size void 3346inline_size void ecb_cold
3075ev_check_2625 (EV_P) 3347ev_check_2625 (EV_P)
3076{ 3348{
3077 /* kernels < 2.6.25 are borked 3349 /* kernels < 2.6.25 are borked
3078 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3350 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3079 */ 3351 */
3400 3672
3401#if EV_EMBED_ENABLE 3673#if EV_EMBED_ENABLE
3402void noinline 3674void noinline
3403ev_embed_sweep (EV_P_ ev_embed *w) 3675ev_embed_sweep (EV_P_ ev_embed *w)
3404{ 3676{
3405 ev_loop (w->other, EVLOOP_NONBLOCK); 3677 ev_run (w->other, EVRUN_NOWAIT);
3406} 3678}
3407 3679
3408static void 3680static void
3409embed_io_cb (EV_P_ ev_io *io, int revents) 3681embed_io_cb (EV_P_ ev_io *io, int revents)
3410{ 3682{
3411 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3683 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3412 3684
3413 if (ev_cb (w)) 3685 if (ev_cb (w))
3414 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3686 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3415 else 3687 else
3416 ev_loop (w->other, EVLOOP_NONBLOCK); 3688 ev_run (w->other, EVRUN_NOWAIT);
3417} 3689}
3418 3690
3419static void 3691static void
3420embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3692embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3421{ 3693{
3425 EV_P = w->other; 3697 EV_P = w->other;
3426 3698
3427 while (fdchangecnt) 3699 while (fdchangecnt)
3428 { 3700 {
3429 fd_reify (EV_A); 3701 fd_reify (EV_A);
3430 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3702 ev_run (EV_A_ EVRUN_NOWAIT);
3431 } 3703 }
3432 } 3704 }
3433} 3705}
3434 3706
3435static void 3707static void
3441 3713
3442 { 3714 {
3443 EV_P = w->other; 3715 EV_P = w->other;
3444 3716
3445 ev_loop_fork (EV_A); 3717 ev_loop_fork (EV_A);
3446 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3718 ev_run (EV_A_ EVRUN_NOWAIT);
3447 } 3719 }
3448 3720
3449 ev_embed_start (EV_A_ w); 3721 ev_embed_start (EV_A_ w);
3450} 3722}
3451 3723
3543 3815
3544 EV_FREQUENT_CHECK; 3816 EV_FREQUENT_CHECK;
3545} 3817}
3546#endif 3818#endif
3547 3819
3820#if EV_CLEANUP_ENABLE
3821void
3822ev_cleanup_start (EV_P_ ev_cleanup *w)
3823{
3824 if (expect_false (ev_is_active (w)))
3825 return;
3826
3827 EV_FREQUENT_CHECK;
3828
3829 ev_start (EV_A_ (W)w, ++cleanupcnt);
3830 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3831 cleanups [cleanupcnt - 1] = w;
3832
3833 /* cleanup watchers should never keep a refcount on the loop */
3834 ev_unref (EV_A);
3835 EV_FREQUENT_CHECK;
3836}
3837
3838void
3839ev_cleanup_stop (EV_P_ ev_cleanup *w)
3840{
3841 clear_pending (EV_A_ (W)w);
3842 if (expect_false (!ev_is_active (w)))
3843 return;
3844
3845 EV_FREQUENT_CHECK;
3846 ev_ref (EV_A);
3847
3848 {
3849 int active = ev_active (w);
3850
3851 cleanups [active - 1] = cleanups [--cleanupcnt];
3852 ev_active (cleanups [active - 1]) = active;
3853 }
3854
3855 ev_stop (EV_A_ (W)w);
3856
3857 EV_FREQUENT_CHECK;
3858}
3859#endif
3860
3548#if EV_ASYNC_ENABLE 3861#if EV_ASYNC_ENABLE
3549void 3862void
3550ev_async_start (EV_P_ ev_async *w) 3863ev_async_start (EV_P_ ev_async *w)
3551{ 3864{
3552 if (expect_false (ev_is_active (w))) 3865 if (expect_false (ev_is_active (w)))
3553 return; 3866 return;
3867
3868 w->sent = 0;
3554 3869
3555 evpipe_init (EV_A); 3870 evpipe_init (EV_A);
3556 3871
3557 EV_FREQUENT_CHECK; 3872 EV_FREQUENT_CHECK;
3558 3873
3636{ 3951{
3637 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3952 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3638 3953
3639 if (expect_false (!once)) 3954 if (expect_false (!once))
3640 { 3955 {
3641 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3956 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3642 return; 3957 return;
3643 } 3958 }
3644 3959
3645 once->cb = cb; 3960 once->cb = cb;
3646 once->arg = arg; 3961 once->arg = arg;
3661} 3976}
3662 3977
3663/*****************************************************************************/ 3978/*****************************************************************************/
3664 3979
3665#if EV_WALK_ENABLE 3980#if EV_WALK_ENABLE
3666void 3981void ecb_cold
3667ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 3982ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3668{ 3983{
3669 int i, j; 3984 int i, j;
3670 ev_watcher_list *wl, *wn; 3985 ev_watcher_list *wl, *wn;
3671 3986
3715 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4030 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3716#endif 4031#endif
3717 4032
3718#if EV_IDLE_ENABLE 4033#if EV_IDLE_ENABLE
3719 if (types & EV_IDLE) 4034 if (types & EV_IDLE)
3720 for (j = NUMPRI; i--; ) 4035 for (j = NUMPRI; j--; )
3721 for (i = idlecnt [j]; i--; ) 4036 for (i = idlecnt [j]; i--; )
3722 cb (EV_A_ EV_IDLE, idles [j][i]); 4037 cb (EV_A_ EV_IDLE, idles [j][i]);
3723#endif 4038#endif
3724 4039
3725#if EV_FORK_ENABLE 4040#if EV_FORK_ENABLE
3778 4093
3779#if EV_MULTIPLICITY 4094#if EV_MULTIPLICITY
3780 #include "ev_wrap.h" 4095 #include "ev_wrap.h"
3781#endif 4096#endif
3782 4097
3783#ifdef __cplusplus 4098EV_CPP(})
3784}
3785#endif
3786 4099

Diff Legend

Removed lines
+ Added lines
< Changed lines
> Changed lines