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Comparing libev/ev.c (file contents):
Revision 1.339 by root, Tue Mar 16 00:43:22 2010 UTC vs.
Revision 1.388 by root, Fri Jul 29 12:17:26 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 && 0 /* TODO: only true when using volatiles */
517 #define ECB_MEMORY_FENCE do { } while (0)
518 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
519 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
520 #elif defined(_WIN32)
521 #include <WinNT.h>
522 #define ECB_MEMORY_FENCE MemoryBarrier ()
523 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
524 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
525 #endif
526#endif
527
528#ifndef ECB_MEMORY_FENCE
529 #include <pthread.h>
530
531 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
532 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
533 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
534 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
535#endif
536
537#if ECB_GCC_VERSION(3,1)
538 #define ecb_attribute(attrlist) __attribute__(attrlist)
539 #define ecb_is_constant(expr) __builtin_constant_p (expr)
540 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
541 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
542#else
543 #define ecb_attribute(attrlist)
544 #define ecb_is_constant(expr) 0
545 #define ecb_expect(expr,value) (expr)
546 #define ecb_prefetch(addr,rw,locality)
547#endif
548
549#define ecb_noinline ecb_attribute ((__noinline__))
550#define ecb_noreturn ecb_attribute ((__noreturn__))
551#define ecb_unused ecb_attribute ((__unused__))
552#define ecb_const ecb_attribute ((__const__))
553#define ecb_pure ecb_attribute ((__pure__))
554
555#if ECB_GCC_VERSION(4,3)
556 #define ecb_artificial ecb_attribute ((__artificial__))
557 #define ecb_hot ecb_attribute ((__hot__))
558 #define ecb_cold ecb_attribute ((__cold__))
559#else
560 #define ecb_artificial
561 #define ecb_hot
562 #define ecb_cold
563#endif
564
565/* put around conditional expressions if you are very sure that the */
566/* expression is mostly true or mostly false. note that these return */
567/* booleans, not the expression. */
469#define expect_false(expr) expect ((expr) != 0, 0) 568#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
470#define expect_true(expr) expect ((expr) != 0, 1) 569#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
570/* ecb.h end */
571
572#define expect_false(cond) ecb_expect_false (cond)
573#define expect_true(cond) ecb_expect_true (cond)
574#define noinline ecb_noinline
575
471#define inline_size static inline 576#define inline_size ecb_inline
472 577
473#if EV_FEATURE_CODE 578#if EV_FEATURE_CODE
474# define inline_speed static inline 579# define inline_speed ecb_inline
475#else 580#else
476# define inline_speed static noinline 581# define inline_speed static noinline
477#endif 582#endif
478 583
479#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 584#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
494#define ev_active(w) ((W)(w))->active 599#define ev_active(w) ((W)(w))->active
495#define ev_at(w) ((WT)(w))->at 600#define ev_at(w) ((WT)(w))->at
496 601
497#if EV_USE_REALTIME 602#if EV_USE_REALTIME
498/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 603/* 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 */ 604/* giving it a reasonably high chance of working on typical architectures */
500static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 605static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
501#endif 606#endif
502 607
503#if EV_USE_MONOTONIC 608#if EV_USE_MONOTONIC
504static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 609static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
518# include "ev_win32.c" 623# include "ev_win32.c"
519#endif 624#endif
520 625
521/*****************************************************************************/ 626/*****************************************************************************/
522 627
628/* define a suitable floor function (only used by periodics atm) */
629
630#if EV_USE_FLOOR
631# include <math.h>
632# define ev_floor(v) floor (v)
633#else
634
635#include <float.h>
636
637/* a floor() replacement function, should be independent of ev_tstamp type */
638static ev_tstamp noinline
639ev_floor (ev_tstamp v)
640{
641 /* the choice of shift factor is not terribly important */
642#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
643 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
644#else
645 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
646#endif
647
648 /* argument too large for an unsigned long? */
649 if (expect_false (v >= shift))
650 {
651 ev_tstamp f;
652
653 if (v == v - 1.)
654 return v; /* very large number */
655
656 f = shift * ev_floor (v * (1. / shift));
657 return f + ev_floor (v - f);
658 }
659
660 /* special treatment for negative args? */
661 if (expect_false (v < 0.))
662 {
663 ev_tstamp f = -ev_floor (-v);
664
665 return f - (f == v ? 0 : 1);
666 }
667
668 /* fits into an unsigned long */
669 return (unsigned long)v;
670}
671
672#endif
673
674/*****************************************************************************/
675
676#ifdef __linux
677# include <sys/utsname.h>
678#endif
679
680static unsigned int noinline ecb_cold
681ev_linux_version (void)
682{
683#ifdef __linux
684 unsigned int v = 0;
685 struct utsname buf;
686 int i;
687 char *p = buf.release;
688
689 if (uname (&buf))
690 return 0;
691
692 for (i = 3+1; --i; )
693 {
694 unsigned int c = 0;
695
696 for (;;)
697 {
698 if (*p >= '0' && *p <= '9')
699 c = c * 10 + *p++ - '0';
700 else
701 {
702 p += *p == '.';
703 break;
704 }
705 }
706
707 v = (v << 8) | c;
708 }
709
710 return v;
711#else
712 return 0;
713#endif
714}
715
716/*****************************************************************************/
717
523#if EV_AVOID_STDIO 718#if EV_AVOID_STDIO
524static void noinline 719static void noinline ecb_cold
525ev_printerr (const char *msg) 720ev_printerr (const char *msg)
526{ 721{
527 write (STDERR_FILENO, msg, strlen (msg)); 722 write (STDERR_FILENO, msg, strlen (msg));
528} 723}
529#endif 724#endif
530 725
531static void (*syserr_cb)(const char *msg); 726static void (*syserr_cb)(const char *msg);
532 727
533void 728void ecb_cold
534ev_set_syserr_cb (void (*cb)(const char *msg)) 729ev_set_syserr_cb (void (*cb)(const char *msg))
535{ 730{
536 syserr_cb = cb; 731 syserr_cb = cb;
537} 732}
538 733
539static void noinline 734static void noinline ecb_cold
540ev_syserr (const char *msg) 735ev_syserr (const char *msg)
541{ 736{
542 if (!msg) 737 if (!msg)
543 msg = "(libev) system error"; 738 msg = "(libev) system error";
544 739
545 if (syserr_cb) 740 if (syserr_cb)
546 syserr_cb (msg); 741 syserr_cb (msg);
547 else 742 else
548 { 743 {
549#if EV_AVOID_STDIO 744#if EV_AVOID_STDIO
550 const char *err = strerror (errno);
551
552 ev_printerr (msg); 745 ev_printerr (msg);
553 ev_printerr (": "); 746 ev_printerr (": ");
554 ev_printerr (err); 747 ev_printerr (strerror (errno));
555 ev_printerr ("\n"); 748 ev_printerr ("\n");
556#else 749#else
557 perror (msg); 750 perror (msg);
558#endif 751#endif
559 abort (); 752 abort ();
579#endif 772#endif
580} 773}
581 774
582static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 775static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
583 776
584void 777void ecb_cold
585ev_set_allocator (void *(*cb)(void *ptr, long size)) 778ev_set_allocator (void *(*cb)(void *ptr, long size))
586{ 779{
587 alloc = cb; 780 alloc = cb;
588} 781}
589 782
593 ptr = alloc (ptr, size); 786 ptr = alloc (ptr, size);
594 787
595 if (!ptr && size) 788 if (!ptr && size)
596 { 789 {
597#if EV_AVOID_STDIO 790#if EV_AVOID_STDIO
598 ev_printerr ("libev: memory allocation failed, aborting.\n"); 791 ev_printerr ("(libev) memory allocation failed, aborting.\n");
599#else 792#else
600 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 793 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
601#endif 794#endif
602 abort (); 795 abort ();
603 } 796 }
604 797
605 return ptr; 798 return ptr;
622 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 815 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
623 unsigned char unused; 816 unsigned char unused;
624#if EV_USE_EPOLL 817#if EV_USE_EPOLL
625 unsigned int egen; /* generation counter to counter epoll bugs */ 818 unsigned int egen; /* generation counter to counter epoll bugs */
626#endif 819#endif
627#if EV_SELECT_IS_WINSOCKET 820#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
628 SOCKET handle; 821 SOCKET handle;
822#endif
823#if EV_USE_IOCP
824 OVERLAPPED or, ow;
629#endif 825#endif
630} ANFD; 826} ANFD;
631 827
632/* stores the pending event set for a given watcher */ 828/* stores the pending event set for a given watcher */
633typedef struct 829typedef struct
698# define EV_RELEASE_CB (void)0 894# define EV_RELEASE_CB (void)0
699# define EV_ACQUIRE_CB (void)0 895# define EV_ACQUIRE_CB (void)0
700# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 896# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
701#endif 897#endif
702 898
703#define EVUNLOOP_RECURSE 0x80 899#define EVBREAK_RECURSE 0x80
704 900
705/*****************************************************************************/ 901/*****************************************************************************/
706 902
707#ifndef EV_HAVE_EV_TIME 903#ifndef EV_HAVE_EV_TIME
708ev_tstamp 904ev_tstamp
752 if (delay > 0.) 948 if (delay > 0.)
753 { 949 {
754#if EV_USE_NANOSLEEP 950#if EV_USE_NANOSLEEP
755 struct timespec ts; 951 struct timespec ts;
756 952
757 ts.tv_sec = (time_t)delay; 953 EV_TS_SET (ts, delay);
758 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
759
760 nanosleep (&ts, 0); 954 nanosleep (&ts, 0);
761#elif defined(_WIN32) 955#elif defined(_WIN32)
762 Sleep ((unsigned long)(delay * 1e3)); 956 Sleep ((unsigned long)(delay * 1e3));
763#else 957#else
764 struct timeval tv; 958 struct timeval tv;
765 959
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 */ 960 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770 /* something not guaranteed by newer posix versions, but guaranteed */ 961 /* something not guaranteed by newer posix versions, but guaranteed */
771 /* by older ones */ 962 /* by older ones */
963 EV_TV_SET (tv, delay);
772 select (0, 0, 0, 0, &tv); 964 select (0, 0, 0, 0, &tv);
773#endif 965#endif
774 } 966 }
775} 967}
776 968
777/*****************************************************************************/ 969/*****************************************************************************/
778 970
779#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 971#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
780 972
781/* find a suitable new size for the given array, */ 973/* find a suitable new size for the given array, */
782/* hopefully by rounding to a ncie-to-malloc size */ 974/* hopefully by rounding to a nice-to-malloc size */
783inline_size int 975inline_size int
784array_nextsize (int elem, int cur, int cnt) 976array_nextsize (int elem, int cur, int cnt)
785{ 977{
786 int ncur = cur + 1; 978 int ncur = cur + 1;
787 979
799 } 991 }
800 992
801 return ncur; 993 return ncur;
802} 994}
803 995
804static noinline void * 996static void * noinline ecb_cold
805array_realloc (int elem, void *base, int *cur, int cnt) 997array_realloc (int elem, void *base, int *cur, int cnt)
806{ 998{
807 *cur = array_nextsize (elem, *cur, cnt); 999 *cur = array_nextsize (elem, *cur, cnt);
808 return ev_realloc (base, elem * *cur); 1000 return ev_realloc (base, elem * *cur);
809} 1001}
812 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1004 memset ((void *)(base), 0, sizeof (*(base)) * (count))
813 1005
814#define array_needsize(type,base,cur,cnt,init) \ 1006#define array_needsize(type,base,cur,cnt,init) \
815 if (expect_false ((cnt) > (cur))) \ 1007 if (expect_false ((cnt) > (cur))) \
816 { \ 1008 { \
817 int ocur_ = (cur); \ 1009 int ecb_unused ocur_ = (cur); \
818 (base) = (type *)array_realloc \ 1010 (base) = (type *)array_realloc \
819 (sizeof (type), (base), &(cur), (cnt)); \ 1011 (sizeof (type), (base), &(cur), (cnt)); \
820 init ((base) + (ocur_), (cur) - ocur_); \ 1012 init ((base) + (ocur_), (cur) - ocur_); \
821 } 1013 }
822 1014
922inline_size void 1114inline_size void
923fd_reify (EV_P) 1115fd_reify (EV_P)
924{ 1116{
925 int i; 1117 int i;
926 1118
1119#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1120 for (i = 0; i < fdchangecnt; ++i)
1121 {
1122 int fd = fdchanges [i];
1123 ANFD *anfd = anfds + fd;
1124
1125 if (anfd->reify & EV__IOFDSET && anfd->head)
1126 {
1127 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1128
1129 if (handle != anfd->handle)
1130 {
1131 unsigned long arg;
1132
1133 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1134
1135 /* handle changed, but fd didn't - we need to do it in two steps */
1136 backend_modify (EV_A_ fd, anfd->events, 0);
1137 anfd->events = 0;
1138 anfd->handle = handle;
1139 }
1140 }
1141 }
1142#endif
1143
927 for (i = 0; i < fdchangecnt; ++i) 1144 for (i = 0; i < fdchangecnt; ++i)
928 { 1145 {
929 int fd = fdchanges [i]; 1146 int fd = fdchanges [i];
930 ANFD *anfd = anfds + fd; 1147 ANFD *anfd = anfds + fd;
931 ev_io *w; 1148 ev_io *w;
932 1149
933 unsigned char events = 0; 1150 unsigned char o_events = anfd->events;
1151 unsigned char o_reify = anfd->reify;
934 1152
935 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1153 anfd->reify = 0;
936 events |= (unsigned char)w->events;
937 1154
938#if EV_SELECT_IS_WINSOCKET 1155 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
939 if (events)
940 { 1156 {
941 unsigned long arg; 1157 anfd->events = 0;
942 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1158
943 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1159 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1160 anfd->events |= (unsigned char)w->events;
1161
1162 if (o_events != anfd->events)
1163 o_reify = EV__IOFDSET; /* actually |= */
944 } 1164 }
945#endif
946 1165
947 { 1166 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); 1167 backend_modify (EV_A_ fd, o_events, anfd->events);
956 }
957 } 1168 }
958 1169
959 fdchangecnt = 0; 1170 fdchangecnt = 0;
960} 1171}
961 1172
973 fdchanges [fdchangecnt - 1] = fd; 1184 fdchanges [fdchangecnt - 1] = fd;
974 } 1185 }
975} 1186}
976 1187
977/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1188/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
978inline_speed void 1189inline_speed void ecb_cold
979fd_kill (EV_P_ int fd) 1190fd_kill (EV_P_ int fd)
980{ 1191{
981 ev_io *w; 1192 ev_io *w;
982 1193
983 while ((w = (ev_io *)anfds [fd].head)) 1194 while ((w = (ev_io *)anfds [fd].head))
986 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1197 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
987 } 1198 }
988} 1199}
989 1200
990/* check whether the given fd is actually valid, for error recovery */ 1201/* check whether the given fd is actually valid, for error recovery */
991inline_size int 1202inline_size int ecb_cold
992fd_valid (int fd) 1203fd_valid (int fd)
993{ 1204{
994#ifdef _WIN32 1205#ifdef _WIN32
995 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1206 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
996#else 1207#else
997 return fcntl (fd, F_GETFD) != -1; 1208 return fcntl (fd, F_GETFD) != -1;
998#endif 1209#endif
999} 1210}
1000 1211
1001/* called on EBADF to verify fds */ 1212/* called on EBADF to verify fds */
1002static void noinline 1213static void noinline ecb_cold
1003fd_ebadf (EV_P) 1214fd_ebadf (EV_P)
1004{ 1215{
1005 int fd; 1216 int fd;
1006 1217
1007 for (fd = 0; fd < anfdmax; ++fd) 1218 for (fd = 0; fd < anfdmax; ++fd)
1009 if (!fd_valid (fd) && errno == EBADF) 1220 if (!fd_valid (fd) && errno == EBADF)
1010 fd_kill (EV_A_ fd); 1221 fd_kill (EV_A_ fd);
1011} 1222}
1012 1223
1013/* called on ENOMEM in select/poll to kill some fds and retry */ 1224/* called on ENOMEM in select/poll to kill some fds and retry */
1014static void noinline 1225static void noinline ecb_cold
1015fd_enomem (EV_P) 1226fd_enomem (EV_P)
1016{ 1227{
1017 int fd; 1228 int fd;
1018 1229
1019 for (fd = anfdmax; fd--; ) 1230 for (fd = anfdmax; fd--; )
1054} 1265}
1055 1266
1056/*****************************************************************************/ 1267/*****************************************************************************/
1057 1268
1058/* 1269/*
1059 * the heap functions want a real array index. array index 0 uis guaranteed to not 1270 * 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 1271 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1061 * the branching factor of the d-tree. 1272 * the branching factor of the d-tree.
1062 */ 1273 */
1063 1274
1064/* 1275/*
1214 1425
1215/*****************************************************************************/ 1426/*****************************************************************************/
1216 1427
1217#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 1428#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1218 1429
1219static void noinline 1430static void noinline ecb_cold
1220evpipe_init (EV_P) 1431evpipe_init (EV_P)
1221{ 1432{
1222 if (!ev_is_active (&pipe_w)) 1433 if (!ev_is_active (&pipe_w))
1223 { 1434 {
1224# if EV_USE_EVENTFD 1435# if EV_USE_EVENTFD
1246 ev_io_start (EV_A_ &pipe_w); 1457 ev_io_start (EV_A_ &pipe_w);
1247 ev_unref (EV_A); /* watcher should not keep loop alive */ 1458 ev_unref (EV_A); /* watcher should not keep loop alive */
1248 } 1459 }
1249} 1460}
1250 1461
1251inline_size void 1462inline_speed void
1252evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1463evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253{ 1464{
1254 if (!*flag) 1465 if (expect_true (*flag))
1466 return;
1467
1468 *flag = 1;
1469
1470 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1471
1472 pipe_write_skipped = 1;
1473
1474 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1475
1476 if (pipe_write_wanted)
1255 { 1477 {
1478 int old_errno;
1479
1480 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1481
1256 int old_errno = errno; /* save errno because write might clobber it */ 1482 old_errno = errno; /* save errno because write will clobber it */
1257 char dummy;
1258
1259 *flag = 1;
1260 1483
1261#if EV_USE_EVENTFD 1484#if EV_USE_EVENTFD
1262 if (evfd >= 0) 1485 if (evfd >= 0)
1263 { 1486 {
1264 uint64_t counter = 1; 1487 uint64_t counter = 1;
1265 write (evfd, &counter, sizeof (uint64_t)); 1488 write (evfd, &counter, sizeof (uint64_t));
1266 } 1489 }
1267 else 1490 else
1268#endif 1491#endif
1492 {
1493 /* win32 people keep sending patches that change this write() to send() */
1494 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1495 /* so when you think this write should be a send instead, please find out */
1496 /* where your send() is from - it's definitely not the microsoft send, and */
1497 /* tell me. thank you. */
1269 write (evpipe [1], &dummy, 1); 1498 write (evpipe [1], &(evpipe [1]), 1);
1499 }
1270 1500
1271 errno = old_errno; 1501 errno = old_errno;
1272 } 1502 }
1273} 1503}
1274 1504
1277static void 1507static void
1278pipecb (EV_P_ ev_io *iow, int revents) 1508pipecb (EV_P_ ev_io *iow, int revents)
1279{ 1509{
1280 int i; 1510 int i;
1281 1511
1512 if (revents & EV_READ)
1513 {
1282#if EV_USE_EVENTFD 1514#if EV_USE_EVENTFD
1283 if (evfd >= 0) 1515 if (evfd >= 0)
1284 { 1516 {
1285 uint64_t counter; 1517 uint64_t counter;
1286 read (evfd, &counter, sizeof (uint64_t)); 1518 read (evfd, &counter, sizeof (uint64_t));
1287 } 1519 }
1288 else 1520 else
1289#endif 1521#endif
1290 { 1522 {
1291 char dummy; 1523 char dummy;
1524 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1292 read (evpipe [0], &dummy, 1); 1525 read (evpipe [0], &dummy, 1);
1526 }
1293 } 1527 }
1294 1528
1529 pipe_write_skipped = 0;
1530
1531#if EV_SIGNAL_ENABLE
1295 if (sig_pending) 1532 if (sig_pending)
1296 { 1533 {
1297 sig_pending = 0; 1534 sig_pending = 0;
1298 1535
1299 for (i = EV_NSIG - 1; i--; ) 1536 for (i = EV_NSIG - 1; i--; )
1300 if (expect_false (signals [i].pending)) 1537 if (expect_false (signals [i].pending))
1301 ev_feed_signal_event (EV_A_ i + 1); 1538 ev_feed_signal_event (EV_A_ i + 1);
1302 } 1539 }
1540#endif
1303 1541
1304#if EV_ASYNC_ENABLE 1542#if EV_ASYNC_ENABLE
1305 if (async_pending) 1543 if (async_pending)
1306 { 1544 {
1307 async_pending = 0; 1545 async_pending = 0;
1316#endif 1554#endif
1317} 1555}
1318 1556
1319/*****************************************************************************/ 1557/*****************************************************************************/
1320 1558
1559void
1560ev_feed_signal (int signum)
1561{
1562#if EV_MULTIPLICITY
1563 EV_P = signals [signum - 1].loop;
1564
1565 if (!EV_A)
1566 return;
1567#endif
1568
1569 if (!ev_active (&pipe_w))
1570 return;
1571
1572 signals [signum - 1].pending = 1;
1573 evpipe_write (EV_A_ &sig_pending);
1574}
1575
1321static void 1576static void
1322ev_sighandler (int signum) 1577ev_sighandler (int signum)
1323{ 1578{
1324#if EV_MULTIPLICITY
1325 EV_P = signals [signum - 1].loop;
1326#endif
1327
1328#ifdef _WIN32 1579#ifdef _WIN32
1329 signal (signum, ev_sighandler); 1580 signal (signum, ev_sighandler);
1330#endif 1581#endif
1331 1582
1332 signals [signum - 1].pending = 1; 1583 ev_feed_signal (signum);
1333 evpipe_write (EV_A_ &sig_pending);
1334} 1584}
1335 1585
1336void noinline 1586void noinline
1337ev_feed_signal_event (EV_P_ int signum) 1587ev_feed_signal_event (EV_P_ int signum)
1338{ 1588{
1438 1688
1439#endif 1689#endif
1440 1690
1441/*****************************************************************************/ 1691/*****************************************************************************/
1442 1692
1693#if EV_USE_IOCP
1694# include "ev_iocp.c"
1695#endif
1443#if EV_USE_PORT 1696#if EV_USE_PORT
1444# include "ev_port.c" 1697# include "ev_port.c"
1445#endif 1698#endif
1446#if EV_USE_KQUEUE 1699#if EV_USE_KQUEUE
1447# include "ev_kqueue.c" 1700# include "ev_kqueue.c"
1454#endif 1707#endif
1455#if EV_USE_SELECT 1708#if EV_USE_SELECT
1456# include "ev_select.c" 1709# include "ev_select.c"
1457#endif 1710#endif
1458 1711
1459int 1712int ecb_cold
1460ev_version_major (void) 1713ev_version_major (void)
1461{ 1714{
1462 return EV_VERSION_MAJOR; 1715 return EV_VERSION_MAJOR;
1463} 1716}
1464 1717
1465int 1718int ecb_cold
1466ev_version_minor (void) 1719ev_version_minor (void)
1467{ 1720{
1468 return EV_VERSION_MINOR; 1721 return EV_VERSION_MINOR;
1469} 1722}
1470 1723
1471/* return true if we are running with elevated privileges and should ignore env variables */ 1724/* return true if we are running with elevated privileges and should ignore env variables */
1472int inline_size 1725int inline_size ecb_cold
1473enable_secure (void) 1726enable_secure (void)
1474{ 1727{
1475#ifdef _WIN32 1728#ifdef _WIN32
1476 return 0; 1729 return 0;
1477#else 1730#else
1478 return getuid () != geteuid () 1731 return getuid () != geteuid ()
1479 || getgid () != getegid (); 1732 || getgid () != getegid ();
1480#endif 1733#endif
1481} 1734}
1482 1735
1483unsigned int 1736unsigned int ecb_cold
1484ev_supported_backends (void) 1737ev_supported_backends (void)
1485{ 1738{
1486 unsigned int flags = 0; 1739 unsigned int flags = 0;
1487 1740
1488 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1741 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1492 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1745 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1493 1746
1494 return flags; 1747 return flags;
1495} 1748}
1496 1749
1497unsigned int 1750unsigned int ecb_cold
1498ev_recommended_backends (void) 1751ev_recommended_backends (void)
1499{ 1752{
1500 unsigned int flags = ev_supported_backends (); 1753 unsigned int flags = ev_supported_backends ();
1501 1754
1502#ifndef __NetBSD__ 1755#ifndef __NetBSD__
1507#ifdef __APPLE__ 1760#ifdef __APPLE__
1508 /* only select works correctly on that "unix-certified" platform */ 1761 /* only select works correctly on that "unix-certified" platform */
1509 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 1762 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1510 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 1763 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1511#endif 1764#endif
1765#ifdef __FreeBSD__
1766 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1767#endif
1512 1768
1513 return flags; 1769 return flags;
1514} 1770}
1515 1771
1516unsigned int 1772unsigned int ecb_cold
1517ev_embeddable_backends (void) 1773ev_embeddable_backends (void)
1518{ 1774{
1519 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1775 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1520 1776
1521 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1777 /* 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 */ 1778 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1523 flags &= ~EVBACKEND_EPOLL; 1779 flags &= ~EVBACKEND_EPOLL;
1524 1780
1525 return flags; 1781 return flags;
1526} 1782}
1527 1783
1528unsigned int 1784unsigned int
1531 return backend; 1787 return backend;
1532} 1788}
1533 1789
1534#if EV_FEATURE_API 1790#if EV_FEATURE_API
1535unsigned int 1791unsigned int
1536ev_loop_count (EV_P) 1792ev_iteration (EV_P)
1537{ 1793{
1538 return loop_count; 1794 return loop_count;
1539} 1795}
1540 1796
1541unsigned int 1797unsigned int
1542ev_loop_depth (EV_P) 1798ev_depth (EV_P)
1543{ 1799{
1544 return loop_depth; 1800 return loop_depth;
1545} 1801}
1546 1802
1547void 1803void
1566ev_userdata (EV_P) 1822ev_userdata (EV_P)
1567{ 1823{
1568 return userdata; 1824 return userdata;
1569} 1825}
1570 1826
1827void
1571void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 1828ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1572{ 1829{
1573 invoke_cb = invoke_pending_cb; 1830 invoke_cb = invoke_pending_cb;
1574} 1831}
1575 1832
1833void
1576void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 1834ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1577{ 1835{
1578 release_cb = release; 1836 release_cb = release;
1579 acquire_cb = acquire; 1837 acquire_cb = acquire;
1580} 1838}
1581#endif 1839#endif
1582 1840
1583/* initialise a loop structure, must be zero-initialised */ 1841/* initialise a loop structure, must be zero-initialised */
1584static void noinline 1842static void noinline ecb_cold
1585loop_init (EV_P_ unsigned int flags) 1843loop_init (EV_P_ unsigned int flags)
1586{ 1844{
1587 if (!backend) 1845 if (!backend)
1588 { 1846 {
1847 origflags = flags;
1848
1589#if EV_USE_REALTIME 1849#if EV_USE_REALTIME
1590 if (!have_realtime) 1850 if (!have_realtime)
1591 { 1851 {
1592 struct timespec ts; 1852 struct timespec ts;
1593 1853
1615 if (!(flags & EVFLAG_NOENV) 1875 if (!(flags & EVFLAG_NOENV)
1616 && !enable_secure () 1876 && !enable_secure ()
1617 && getenv ("LIBEV_FLAGS")) 1877 && getenv ("LIBEV_FLAGS"))
1618 flags = atoi (getenv ("LIBEV_FLAGS")); 1878 flags = atoi (getenv ("LIBEV_FLAGS"));
1619 1879
1620 ev_rt_now = ev_time (); 1880 ev_rt_now = ev_time ();
1621 mn_now = get_clock (); 1881 mn_now = get_clock ();
1622 now_floor = mn_now; 1882 now_floor = mn_now;
1623 rtmn_diff = ev_rt_now - mn_now; 1883 rtmn_diff = ev_rt_now - mn_now;
1624#if EV_FEATURE_API 1884#if EV_FEATURE_API
1625 invoke_cb = ev_invoke_pending; 1885 invoke_cb = ev_invoke_pending;
1626#endif 1886#endif
1627 1887
1628 io_blocktime = 0.; 1888 io_blocktime = 0.;
1629 timeout_blocktime = 0.; 1889 timeout_blocktime = 0.;
1630 backend = 0; 1890 backend = 0;
1631 backend_fd = -1; 1891 backend_fd = -1;
1632 sig_pending = 0; 1892 sig_pending = 0;
1633#if EV_ASYNC_ENABLE 1893#if EV_ASYNC_ENABLE
1634 async_pending = 0; 1894 async_pending = 0;
1635#endif 1895#endif
1896 pipe_write_skipped = 0;
1897 pipe_write_wanted = 0;
1636#if EV_USE_INOTIFY 1898#if EV_USE_INOTIFY
1637 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 1899 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1638#endif 1900#endif
1639#if EV_USE_SIGNALFD 1901#if EV_USE_SIGNALFD
1640 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1902 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1641#endif 1903#endif
1642 1904
1643 if (!(flags & 0x0000ffffU)) 1905 if (!(flags & EVBACKEND_MASK))
1644 flags |= ev_recommended_backends (); 1906 flags |= ev_recommended_backends ();
1645 1907
1908#if EV_USE_IOCP
1909 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1910#endif
1646#if EV_USE_PORT 1911#if EV_USE_PORT
1647 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1912 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1648#endif 1913#endif
1649#if EV_USE_KQUEUE 1914#if EV_USE_KQUEUE
1650 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1915 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1667#endif 1932#endif
1668 } 1933 }
1669} 1934}
1670 1935
1671/* free up a loop structure */ 1936/* free up a loop structure */
1672static void noinline 1937void ecb_cold
1673loop_destroy (EV_P) 1938ev_loop_destroy (EV_P)
1674{ 1939{
1675 int i; 1940 int i;
1941
1942#if EV_MULTIPLICITY
1943 /* mimic free (0) */
1944 if (!EV_A)
1945 return;
1946#endif
1947
1948#if EV_CLEANUP_ENABLE
1949 /* queue cleanup watchers (and execute them) */
1950 if (expect_false (cleanupcnt))
1951 {
1952 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1953 EV_INVOKE_PENDING;
1954 }
1955#endif
1956
1957#if EV_CHILD_ENABLE
1958 if (ev_is_active (&childev))
1959 {
1960 ev_ref (EV_A); /* child watcher */
1961 ev_signal_stop (EV_A_ &childev);
1962 }
1963#endif
1676 1964
1677 if (ev_is_active (&pipe_w)) 1965 if (ev_is_active (&pipe_w))
1678 { 1966 {
1679 /*ev_ref (EV_A);*/ 1967 /*ev_ref (EV_A);*/
1680 /*ev_io_stop (EV_A_ &pipe_w);*/ 1968 /*ev_io_stop (EV_A_ &pipe_w);*/
1702#endif 1990#endif
1703 1991
1704 if (backend_fd >= 0) 1992 if (backend_fd >= 0)
1705 close (backend_fd); 1993 close (backend_fd);
1706 1994
1995#if EV_USE_IOCP
1996 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1997#endif
1707#if EV_USE_PORT 1998#if EV_USE_PORT
1708 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1999 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1709#endif 2000#endif
1710#if EV_USE_KQUEUE 2001#if EV_USE_KQUEUE
1711 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2002 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1738 array_free (periodic, EMPTY); 2029 array_free (periodic, EMPTY);
1739#endif 2030#endif
1740#if EV_FORK_ENABLE 2031#if EV_FORK_ENABLE
1741 array_free (fork, EMPTY); 2032 array_free (fork, EMPTY);
1742#endif 2033#endif
2034#if EV_CLEANUP_ENABLE
2035 array_free (cleanup, EMPTY);
2036#endif
1743 array_free (prepare, EMPTY); 2037 array_free (prepare, EMPTY);
1744 array_free (check, EMPTY); 2038 array_free (check, EMPTY);
1745#if EV_ASYNC_ENABLE 2039#if EV_ASYNC_ENABLE
1746 array_free (async, EMPTY); 2040 array_free (async, EMPTY);
1747#endif 2041#endif
1748 2042
1749 backend = 0; 2043 backend = 0;
2044
2045#if EV_MULTIPLICITY
2046 if (ev_is_default_loop (EV_A))
2047#endif
2048 ev_default_loop_ptr = 0;
2049#if EV_MULTIPLICITY
2050 else
2051 ev_free (EV_A);
2052#endif
1750} 2053}
1751 2054
1752#if EV_USE_INOTIFY 2055#if EV_USE_INOTIFY
1753inline_size void infy_fork (EV_P); 2056inline_size void infy_fork (EV_P);
1754#endif 2057#endif
1769 infy_fork (EV_A); 2072 infy_fork (EV_A);
1770#endif 2073#endif
1771 2074
1772 if (ev_is_active (&pipe_w)) 2075 if (ev_is_active (&pipe_w))
1773 { 2076 {
1774 /* this "locks" the handlers against writing to the pipe */ 2077 /* 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 2078
1781 ev_ref (EV_A); 2079 ev_ref (EV_A);
1782 ev_io_stop (EV_A_ &pipe_w); 2080 ev_io_stop (EV_A_ &pipe_w);
1783 2081
1784#if EV_USE_EVENTFD 2082#if EV_USE_EVENTFD
1802 postfork = 0; 2100 postfork = 0;
1803} 2101}
1804 2102
1805#if EV_MULTIPLICITY 2103#if EV_MULTIPLICITY
1806 2104
1807struct ev_loop * 2105struct ev_loop * ecb_cold
1808ev_loop_new (unsigned int flags) 2106ev_loop_new (unsigned int flags)
1809{ 2107{
1810 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2108 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1811 2109
1812 memset (EV_A, 0, sizeof (struct ev_loop)); 2110 memset (EV_A, 0, sizeof (struct ev_loop));
1813 loop_init (EV_A_ flags); 2111 loop_init (EV_A_ flags);
1814 2112
1815 if (ev_backend (EV_A)) 2113 if (ev_backend (EV_A))
1816 return EV_A; 2114 return EV_A;
1817 2115
2116 ev_free (EV_A);
1818 return 0; 2117 return 0;
1819} 2118}
1820 2119
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 */ 2120#endif /* multiplicity */
1834 2121
1835#if EV_VERIFY 2122#if EV_VERIFY
1836static void noinline 2123static void noinline ecb_cold
1837verify_watcher (EV_P_ W w) 2124verify_watcher (EV_P_ W w)
1838{ 2125{
1839 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2126 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1840 2127
1841 if (w->pending) 2128 if (w->pending)
1842 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2129 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1843} 2130}
1844 2131
1845static void noinline 2132static void noinline ecb_cold
1846verify_heap (EV_P_ ANHE *heap, int N) 2133verify_heap (EV_P_ ANHE *heap, int N)
1847{ 2134{
1848 int i; 2135 int i;
1849 2136
1850 for (i = HEAP0; i < N + HEAP0; ++i) 2137 for (i = HEAP0; i < N + HEAP0; ++i)
1855 2142
1856 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2143 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1857 } 2144 }
1858} 2145}
1859 2146
1860static void noinline 2147static void noinline ecb_cold
1861array_verify (EV_P_ W *ws, int cnt) 2148array_verify (EV_P_ W *ws, int cnt)
1862{ 2149{
1863 while (cnt--) 2150 while (cnt--)
1864 { 2151 {
1865 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2152 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1867 } 2154 }
1868} 2155}
1869#endif 2156#endif
1870 2157
1871#if EV_FEATURE_API 2158#if EV_FEATURE_API
1872void 2159void ecb_cold
1873ev_loop_verify (EV_P) 2160ev_verify (EV_P)
1874{ 2161{
1875#if EV_VERIFY 2162#if EV_VERIFY
1876 int i; 2163 int i;
1877 WL w; 2164 WL w;
1878 2165
1912#if EV_FORK_ENABLE 2199#if EV_FORK_ENABLE
1913 assert (forkmax >= forkcnt); 2200 assert (forkmax >= forkcnt);
1914 array_verify (EV_A_ (W *)forks, forkcnt); 2201 array_verify (EV_A_ (W *)forks, forkcnt);
1915#endif 2202#endif
1916 2203
2204#if EV_CLEANUP_ENABLE
2205 assert (cleanupmax >= cleanupcnt);
2206 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2207#endif
2208
1917#if EV_ASYNC_ENABLE 2209#if EV_ASYNC_ENABLE
1918 assert (asyncmax >= asynccnt); 2210 assert (asyncmax >= asynccnt);
1919 array_verify (EV_A_ (W *)asyncs, asynccnt); 2211 array_verify (EV_A_ (W *)asyncs, asynccnt);
1920#endif 2212#endif
1921 2213
1938#endif 2230#endif
1939} 2231}
1940#endif 2232#endif
1941 2233
1942#if EV_MULTIPLICITY 2234#if EV_MULTIPLICITY
1943struct ev_loop * 2235struct ev_loop * ecb_cold
1944ev_default_loop_init (unsigned int flags)
1945#else 2236#else
1946int 2237int
2238#endif
1947ev_default_loop (unsigned int flags) 2239ev_default_loop (unsigned int flags)
1948#endif
1949{ 2240{
1950 if (!ev_default_loop_ptr) 2241 if (!ev_default_loop_ptr)
1951 { 2242 {
1952#if EV_MULTIPLICITY 2243#if EV_MULTIPLICITY
1953 EV_P = ev_default_loop_ptr = &default_loop_struct; 2244 EV_P = ev_default_loop_ptr = &default_loop_struct;
1972 2263
1973 return ev_default_loop_ptr; 2264 return ev_default_loop_ptr;
1974} 2265}
1975 2266
1976void 2267void
1977ev_default_destroy (void) 2268ev_loop_fork (EV_P)
1978{ 2269{
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 */ 2270 postfork = 1; /* must be in line with ev_default_fork */
2001} 2271}
2002 2272
2003/*****************************************************************************/ 2273/*****************************************************************************/
2004 2274
2005void 2275void
2027 2297
2028 for (pri = NUMPRI; pri--; ) 2298 for (pri = NUMPRI; pri--; )
2029 while (pendingcnt [pri]) 2299 while (pendingcnt [pri])
2030 { 2300 {
2031 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2301 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 2302
2036 p->w->pending = 0; 2303 p->w->pending = 0;
2037 EV_CB_INVOKE (p->w, p->events); 2304 EV_CB_INVOKE (p->w, p->events);
2038 EV_FREQUENT_CHECK; 2305 EV_FREQUENT_CHECK;
2039 } 2306 }
2096 EV_FREQUENT_CHECK; 2363 EV_FREQUENT_CHECK;
2097 feed_reverse (EV_A_ (W)w); 2364 feed_reverse (EV_A_ (W)w);
2098 } 2365 }
2099 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2366 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2100 2367
2101 feed_reverse_done (EV_A_ EV_TIMEOUT); 2368 feed_reverse_done (EV_A_ EV_TIMER);
2102 } 2369 }
2103} 2370}
2104 2371
2105#if EV_PERIODIC_ENABLE 2372#if EV_PERIODIC_ENABLE
2373
2374static void noinline
2375periodic_recalc (EV_P_ ev_periodic *w)
2376{
2377 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2378 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2379
2380 /* the above almost always errs on the low side */
2381 while (at <= ev_rt_now)
2382 {
2383 ev_tstamp nat = at + w->interval;
2384
2385 /* when resolution fails us, we use ev_rt_now */
2386 if (expect_false (nat == at))
2387 {
2388 at = ev_rt_now;
2389 break;
2390 }
2391
2392 at = nat;
2393 }
2394
2395 ev_at (w) = at;
2396}
2397
2106/* make periodics pending */ 2398/* make periodics pending */
2107inline_size void 2399inline_size void
2108periodics_reify (EV_P) 2400periodics_reify (EV_P)
2109{ 2401{
2110 EV_FREQUENT_CHECK; 2402 EV_FREQUENT_CHECK;
2129 ANHE_at_cache (periodics [HEAP0]); 2421 ANHE_at_cache (periodics [HEAP0]);
2130 downheap (periodics, periodiccnt, HEAP0); 2422 downheap (periodics, periodiccnt, HEAP0);
2131 } 2423 }
2132 else if (w->interval) 2424 else if (w->interval)
2133 { 2425 {
2134 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2426 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]); 2427 ANHE_at_cache (periodics [HEAP0]);
2149 downheap (periodics, periodiccnt, HEAP0); 2428 downheap (periodics, periodiccnt, HEAP0);
2150 } 2429 }
2151 else 2430 else
2152 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2431 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2159 feed_reverse_done (EV_A_ EV_PERIODIC); 2438 feed_reverse_done (EV_A_ EV_PERIODIC);
2160 } 2439 }
2161} 2440}
2162 2441
2163/* simply recalculate all periodics */ 2442/* simply recalculate all periodics */
2164/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2443/* TODO: maybe ensure that at least one event happens when jumping forward? */
2165static void noinline 2444static void noinline ecb_cold
2166periodics_reschedule (EV_P) 2445periodics_reschedule (EV_P)
2167{ 2446{
2168 int i; 2447 int i;
2169 2448
2170 /* adjust periodics after time jump */ 2449 /* adjust periodics after time jump */
2173 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2452 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2174 2453
2175 if (w->reschedule_cb) 2454 if (w->reschedule_cb)
2176 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2455 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2177 else if (w->interval) 2456 else if (w->interval)
2178 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2457 periodic_recalc (EV_A_ w);
2179 2458
2180 ANHE_at_cache (periodics [i]); 2459 ANHE_at_cache (periodics [i]);
2181 } 2460 }
2182 2461
2183 reheap (periodics, periodiccnt); 2462 reheap (periodics, periodiccnt);
2184} 2463}
2185#endif 2464#endif
2186 2465
2187/* adjust all timers by a given offset */ 2466/* adjust all timers by a given offset */
2188static void noinline 2467static void noinline ecb_cold
2189timers_reschedule (EV_P_ ev_tstamp adjust) 2468timers_reschedule (EV_P_ ev_tstamp adjust)
2190{ 2469{
2191 int i; 2470 int i;
2192 2471
2193 for (i = 0; i < timercnt; ++i) 2472 for (i = 0; i < timercnt; ++i)
2230 * doesn't hurt either as we only do this on time-jumps or 2509 * doesn't hurt either as we only do this on time-jumps or
2231 * in the unlikely event of having been preempted here. 2510 * in the unlikely event of having been preempted here.
2232 */ 2511 */
2233 for (i = 4; --i; ) 2512 for (i = 4; --i; )
2234 { 2513 {
2514 ev_tstamp diff;
2235 rtmn_diff = ev_rt_now - mn_now; 2515 rtmn_diff = ev_rt_now - mn_now;
2236 2516
2517 diff = odiff - rtmn_diff;
2518
2237 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2519 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2238 return; /* all is well */ 2520 return; /* all is well */
2239 2521
2240 ev_rt_now = ev_time (); 2522 ev_rt_now = ev_time ();
2241 mn_now = get_clock (); 2523 mn_now = get_clock ();
2242 now_floor = mn_now; 2524 now_floor = mn_now;
2265 mn_now = ev_rt_now; 2547 mn_now = ev_rt_now;
2266 } 2548 }
2267} 2549}
2268 2550
2269void 2551void
2270ev_loop (EV_P_ int flags) 2552ev_run (EV_P_ int flags)
2271{ 2553{
2272#if EV_FEATURE_API 2554#if EV_FEATURE_API
2273 ++loop_depth; 2555 ++loop_depth;
2274#endif 2556#endif
2275 2557
2276 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2558 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2277 2559
2278 loop_done = EVUNLOOP_CANCEL; 2560 loop_done = EVBREAK_CANCEL;
2279 2561
2280 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2562 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2281 2563
2282 do 2564 do
2283 { 2565 {
2284#if EV_VERIFY >= 2 2566#if EV_VERIFY >= 2
2285 ev_loop_verify (EV_A); 2567 ev_verify (EV_A);
2286#endif 2568#endif
2287 2569
2288#ifndef _WIN32 2570#ifndef _WIN32
2289 if (expect_false (curpid)) /* penalise the forking check even more */ 2571 if (expect_false (curpid)) /* penalise the forking check even more */
2290 if (expect_false (getpid () != curpid)) 2572 if (expect_false (getpid () != curpid))
2326 /* calculate blocking time */ 2608 /* calculate blocking time */
2327 { 2609 {
2328 ev_tstamp waittime = 0.; 2610 ev_tstamp waittime = 0.;
2329 ev_tstamp sleeptime = 0.; 2611 ev_tstamp sleeptime = 0.;
2330 2612
2613 /* remember old timestamp for io_blocktime calculation */
2614 ev_tstamp prev_mn_now = mn_now;
2615
2616 /* update time to cancel out callback processing overhead */
2617 time_update (EV_A_ 1e100);
2618
2619 /* from now on, we want a pipe-wake-up */
2620 pipe_write_wanted = 1;
2621
2622 ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
2623
2331 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2624 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2332 { 2625 {
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; 2626 waittime = MAX_BLOCKTIME;
2340 2627
2341 if (timercnt) 2628 if (timercnt)
2342 { 2629 {
2343 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2630 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2344 if (waittime > to) waittime = to; 2631 if (waittime > to) waittime = to;
2345 } 2632 }
2346 2633
2347#if EV_PERIODIC_ENABLE 2634#if EV_PERIODIC_ENABLE
2348 if (periodiccnt) 2635 if (periodiccnt)
2349 { 2636 {
2350 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2637 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2351 if (waittime > to) waittime = to; 2638 if (waittime > to) waittime = to;
2352 } 2639 }
2353#endif 2640#endif
2354 2641
2355 /* don't let timeouts decrease the waittime below timeout_blocktime */ 2642 /* don't let timeouts decrease the waittime below timeout_blocktime */
2356 if (expect_false (waittime < timeout_blocktime)) 2643 if (expect_false (waittime < timeout_blocktime))
2357 waittime = timeout_blocktime; 2644 waittime = timeout_blocktime;
2645
2646 /* at this point, we NEED to wait, so we have to ensure */
2647 /* to pass a minimum nonzero value to the backend */
2648 if (expect_false (waittime < backend_mintime))
2649 waittime = backend_mintime;
2358 2650
2359 /* extra check because io_blocktime is commonly 0 */ 2651 /* extra check because io_blocktime is commonly 0 */
2360 if (expect_false (io_blocktime)) 2652 if (expect_false (io_blocktime))
2361 { 2653 {
2362 sleeptime = io_blocktime - (mn_now - prev_mn_now); 2654 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2363 2655
2364 if (sleeptime > waittime - backend_fudge) 2656 if (sleeptime > waittime - backend_mintime)
2365 sleeptime = waittime - backend_fudge; 2657 sleeptime = waittime - backend_mintime;
2366 2658
2367 if (expect_true (sleeptime > 0.)) 2659 if (expect_true (sleeptime > 0.))
2368 { 2660 {
2369 ev_sleep (sleeptime); 2661 ev_sleep (sleeptime);
2370 waittime -= sleeptime; 2662 waittime -= sleeptime;
2373 } 2665 }
2374 2666
2375#if EV_FEATURE_API 2667#if EV_FEATURE_API
2376 ++loop_count; 2668 ++loop_count;
2377#endif 2669#endif
2378 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 2670 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2379 backend_poll (EV_A_ waittime); 2671 backend_poll (EV_A_ waittime);
2380 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 2672 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2673
2674 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2675
2676 if (pipe_write_skipped)
2677 {
2678 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2679 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2680 }
2681
2381 2682
2382 /* update ev_rt_now, do magic */ 2683 /* update ev_rt_now, do magic */
2383 time_update (EV_A_ waittime + sleeptime); 2684 time_update (EV_A_ waittime + sleeptime);
2384 } 2685 }
2385 2686
2403 EV_INVOKE_PENDING; 2704 EV_INVOKE_PENDING;
2404 } 2705 }
2405 while (expect_true ( 2706 while (expect_true (
2406 activecnt 2707 activecnt
2407 && !loop_done 2708 && !loop_done
2408 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2709 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2409 )); 2710 ));
2410 2711
2411 if (loop_done == EVUNLOOP_ONE) 2712 if (loop_done == EVBREAK_ONE)
2412 loop_done = EVUNLOOP_CANCEL; 2713 loop_done = EVBREAK_CANCEL;
2413 2714
2414#if EV_FEATURE_API 2715#if EV_FEATURE_API
2415 --loop_depth; 2716 --loop_depth;
2416#endif 2717#endif
2417} 2718}
2418 2719
2419void 2720void
2420ev_unloop (EV_P_ int how) 2721ev_break (EV_P_ int how)
2421{ 2722{
2422 loop_done = how; 2723 loop_done = how;
2423} 2724}
2424 2725
2425void 2726void
2573 EV_FREQUENT_CHECK; 2874 EV_FREQUENT_CHECK;
2574 2875
2575 wlist_del (&anfds[w->fd].head, (WL)w); 2876 wlist_del (&anfds[w->fd].head, (WL)w);
2576 ev_stop (EV_A_ (W)w); 2877 ev_stop (EV_A_ (W)w);
2577 2878
2578 fd_change (EV_A_ w->fd, 1); 2879 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2579 2880
2580 EV_FREQUENT_CHECK; 2881 EV_FREQUENT_CHECK;
2581} 2882}
2582 2883
2583void noinline 2884void noinline
2675 if (w->reschedule_cb) 2976 if (w->reschedule_cb)
2676 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2977 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2677 else if (w->interval) 2978 else if (w->interval)
2678 { 2979 {
2679 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 2980 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 */ 2981 periodic_recalc (EV_A_ w);
2681 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2682 } 2982 }
2683 else 2983 else
2684 ev_at (w) = w->offset; 2984 ev_at (w) = w->offset;
2685 2985
2686 EV_FREQUENT_CHECK; 2986 EV_FREQUENT_CHECK;
2807 sa.sa_handler = ev_sighandler; 3107 sa.sa_handler = ev_sighandler;
2808 sigfillset (&sa.sa_mask); 3108 sigfillset (&sa.sa_mask);
2809 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3109 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2810 sigaction (w->signum, &sa, 0); 3110 sigaction (w->signum, &sa, 0);
2811 3111
3112 if (origflags & EVFLAG_NOSIGMASK)
3113 {
2812 sigemptyset (&sa.sa_mask); 3114 sigemptyset (&sa.sa_mask);
2813 sigaddset (&sa.sa_mask, w->signum); 3115 sigaddset (&sa.sa_mask, w->signum);
2814 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3116 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3117 }
2815#endif 3118#endif
2816 } 3119 }
2817 3120
2818 EV_FREQUENT_CHECK; 3121 EV_FREQUENT_CHECK;
2819} 3122}
2960 if (!pend || pend == path) 3263 if (!pend || pend == path)
2961 break; 3264 break;
2962 3265
2963 *pend = 0; 3266 *pend = 0;
2964 w->wd = inotify_add_watch (fs_fd, path, mask); 3267 w->wd = inotify_add_watch (fs_fd, path, mask);
2965 } 3268 }
2966 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3269 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2967 } 3270 }
2968 } 3271 }
2969 3272
2970 if (w->wd >= 0) 3273 if (w->wd >= 0)
3037 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3340 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3038 ofs += sizeof (struct inotify_event) + ev->len; 3341 ofs += sizeof (struct inotify_event) + ev->len;
3039 } 3342 }
3040} 3343}
3041 3344
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 3345inline_size void ecb_cold
3075ev_check_2625 (EV_P) 3346ev_check_2625 (EV_P)
3076{ 3347{
3077 /* kernels < 2.6.25 are borked 3348 /* kernels < 2.6.25 are borked
3078 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3349 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3079 */ 3350 */
3400 3671
3401#if EV_EMBED_ENABLE 3672#if EV_EMBED_ENABLE
3402void noinline 3673void noinline
3403ev_embed_sweep (EV_P_ ev_embed *w) 3674ev_embed_sweep (EV_P_ ev_embed *w)
3404{ 3675{
3405 ev_loop (w->other, EVLOOP_NONBLOCK); 3676 ev_run (w->other, EVRUN_NOWAIT);
3406} 3677}
3407 3678
3408static void 3679static void
3409embed_io_cb (EV_P_ ev_io *io, int revents) 3680embed_io_cb (EV_P_ ev_io *io, int revents)
3410{ 3681{
3411 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3682 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3412 3683
3413 if (ev_cb (w)) 3684 if (ev_cb (w))
3414 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3685 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3415 else 3686 else
3416 ev_loop (w->other, EVLOOP_NONBLOCK); 3687 ev_run (w->other, EVRUN_NOWAIT);
3417} 3688}
3418 3689
3419static void 3690static void
3420embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3691embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3421{ 3692{
3425 EV_P = w->other; 3696 EV_P = w->other;
3426 3697
3427 while (fdchangecnt) 3698 while (fdchangecnt)
3428 { 3699 {
3429 fd_reify (EV_A); 3700 fd_reify (EV_A);
3430 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3701 ev_run (EV_A_ EVRUN_NOWAIT);
3431 } 3702 }
3432 } 3703 }
3433} 3704}
3434 3705
3435static void 3706static void
3441 3712
3442 { 3713 {
3443 EV_P = w->other; 3714 EV_P = w->other;
3444 3715
3445 ev_loop_fork (EV_A); 3716 ev_loop_fork (EV_A);
3446 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3717 ev_run (EV_A_ EVRUN_NOWAIT);
3447 } 3718 }
3448 3719
3449 ev_embed_start (EV_A_ w); 3720 ev_embed_start (EV_A_ w);
3450} 3721}
3451 3722
3543 3814
3544 EV_FREQUENT_CHECK; 3815 EV_FREQUENT_CHECK;
3545} 3816}
3546#endif 3817#endif
3547 3818
3819#if EV_CLEANUP_ENABLE
3820void
3821ev_cleanup_start (EV_P_ ev_cleanup *w)
3822{
3823 if (expect_false (ev_is_active (w)))
3824 return;
3825
3826 EV_FREQUENT_CHECK;
3827
3828 ev_start (EV_A_ (W)w, ++cleanupcnt);
3829 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3830 cleanups [cleanupcnt - 1] = w;
3831
3832 /* cleanup watchers should never keep a refcount on the loop */
3833 ev_unref (EV_A);
3834 EV_FREQUENT_CHECK;
3835}
3836
3837void
3838ev_cleanup_stop (EV_P_ ev_cleanup *w)
3839{
3840 clear_pending (EV_A_ (W)w);
3841 if (expect_false (!ev_is_active (w)))
3842 return;
3843
3844 EV_FREQUENT_CHECK;
3845 ev_ref (EV_A);
3846
3847 {
3848 int active = ev_active (w);
3849
3850 cleanups [active - 1] = cleanups [--cleanupcnt];
3851 ev_active (cleanups [active - 1]) = active;
3852 }
3853
3854 ev_stop (EV_A_ (W)w);
3855
3856 EV_FREQUENT_CHECK;
3857}
3858#endif
3859
3548#if EV_ASYNC_ENABLE 3860#if EV_ASYNC_ENABLE
3549void 3861void
3550ev_async_start (EV_P_ ev_async *w) 3862ev_async_start (EV_P_ ev_async *w)
3551{ 3863{
3552 if (expect_false (ev_is_active (w))) 3864 if (expect_false (ev_is_active (w)))
3553 return; 3865 return;
3866
3867 w->sent = 0;
3554 3868
3555 evpipe_init (EV_A); 3869 evpipe_init (EV_A);
3556 3870
3557 EV_FREQUENT_CHECK; 3871 EV_FREQUENT_CHECK;
3558 3872
3636{ 3950{
3637 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3951 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3638 3952
3639 if (expect_false (!once)) 3953 if (expect_false (!once))
3640 { 3954 {
3641 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3955 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3642 return; 3956 return;
3643 } 3957 }
3644 3958
3645 once->cb = cb; 3959 once->cb = cb;
3646 once->arg = arg; 3960 once->arg = arg;
3661} 3975}
3662 3976
3663/*****************************************************************************/ 3977/*****************************************************************************/
3664 3978
3665#if EV_WALK_ENABLE 3979#if EV_WALK_ENABLE
3666void 3980void ecb_cold
3667ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 3981ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3668{ 3982{
3669 int i, j; 3983 int i, j;
3670 ev_watcher_list *wl, *wn; 3984 ev_watcher_list *wl, *wn;
3671 3985
3778 4092
3779#if EV_MULTIPLICITY 4093#if EV_MULTIPLICITY
3780 #include "ev_wrap.h" 4094 #include "ev_wrap.h"
3781#endif 4095#endif
3782 4096
3783#ifdef __cplusplus 4097EV_CPP(})
3784}
3785#endif
3786 4098

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