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Comparing libev/ev.c (file contents):
Revision 1.340 by root, Tue Mar 16 20:39:29 2010 UTC vs.
Revision 1.416 by root, Mon Apr 2 20:12:16 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
57# endif 59# endif
58# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
60# endif 62# endif
61# endif 63# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
63# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
64# endif 66# endif
65 67
66# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
77# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
79# endif 81# endif
80# endif 82# endif
81 83
84# if HAVE_NANOSLEEP
82# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP EV_FEATURE_OS 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
85# else 88# else
89# undef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
87# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
88# endif 100# endif
89 101
102# if HAVE_POLL && HAVE_POLL_H
90# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
92# define EV_USE_SELECT EV_FEATURE_BACKENDS 104# define EV_USE_POLL EV_FEATURE_BACKENDS
93# else
94# define EV_USE_SELECT 0
95# endif 105# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL EV_FEATURE_BACKENDS
101# else 106# else
107# undef EV_USE_POLL
102# define EV_USE_POLL 0 108# define EV_USE_POLL 0
103# endif
104# endif 109# endif
105 110
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
108# define EV_USE_EPOLL EV_FEATURE_BACKENDS 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
109# else
110# define EV_USE_EPOLL 0
111# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
112# endif 118# endif
113 119
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# else
118# define EV_USE_KQUEUE 0
119# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
120# endif 127# endif
121 128
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
124# define EV_USE_PORT EV_FEATURE_BACKENDS 131# define EV_USE_PORT EV_FEATURE_BACKENDS
125# else
126# define EV_USE_PORT 0
127# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
128# endif 136# endif
129 137
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
132# define EV_USE_INOTIFY EV_FEATURE_OS 140# define EV_USE_INOTIFY EV_FEATURE_OS
133# else
134# define EV_USE_INOTIFY 0
135# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
136# endif 145# endif
137 146
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H 147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
140# define EV_USE_SIGNALFD EV_FEATURE_OS 149# define EV_USE_SIGNALFD EV_FEATURE_OS
141# else
142# define EV_USE_SIGNALFD 0
143# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
144# endif 154# endif
145 155
156# if HAVE_EVENTFD
146# ifndef EV_USE_EVENTFD 157# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD EV_FEATURE_OS 158# define EV_USE_EVENTFD EV_FEATURE_OS
149# else
150# define EV_USE_EVENTFD 0
151# endif 159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
152# endif 163# endif
153 164
154#endif 165#endif
155 166
156#include <math.h>
157#include <stdlib.h> 167#include <stdlib.h>
158#include <string.h> 168#include <string.h>
159#include <fcntl.h> 169#include <fcntl.h>
160#include <stddef.h> 170#include <stddef.h>
161 171
… …
171 181
172#ifdef EV_H 182#ifdef EV_H
173# include EV_H 183# include EV_H
174#else 184#else
175# include "ev.h" 185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
176#endif 197#endif
177 198
178#ifndef _WIN32 199#ifndef _WIN32
179# include <sys/time.h> 200# include <sys/time.h>
180# include <sys/wait.h> 201# include <sys/wait.h>
… …
187# define EV_SELECT_IS_WINSOCKET 1 208# define EV_SELECT_IS_WINSOCKET 1
188# endif 209# endif
189# undef EV_AVOID_STDIO 210# undef EV_AVOID_STDIO
190#endif 211#endif
191 212
213/* OS X, in its infinite idiocy, actually HARDCODES
214 * a limit of 1024 into their select. Where people have brains,
215 * OS X engineers apparently have a vacuum. Or maybe they were
216 * ordered to have a vacuum, or they do anything for money.
217 * This might help. Or not.
218 */
219#define _DARWIN_UNLIMITED_SELECT 1
220
192/* this block tries to deduce configuration from header-defined symbols and defaults */ 221/* this block tries to deduce configuration from header-defined symbols and defaults */
193 222
194/* try to deduce the maximum number of signals on this platform */ 223/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG) 224#if defined EV_NSIG
196/* use what's provided */ 225/* use what's provided */
197#elif defined (NSIG) 226#elif defined NSIG
198# define EV_NSIG (NSIG) 227# define EV_NSIG (NSIG)
199#elif defined(_NSIG) 228#elif defined _NSIG
200# define EV_NSIG (_NSIG) 229# define EV_NSIG (_NSIG)
201#elif defined (SIGMAX) 230#elif defined SIGMAX
202# define EV_NSIG (SIGMAX+1) 231# define EV_NSIG (SIGMAX+1)
203#elif defined (SIG_MAX) 232#elif defined SIG_MAX
204# define EV_NSIG (SIG_MAX+1) 233# define EV_NSIG (SIG_MAX+1)
205#elif defined (_SIG_MAX) 234#elif defined _SIG_MAX
206# define EV_NSIG (_SIG_MAX+1) 235# define EV_NSIG (_SIG_MAX+1)
207#elif defined (MAXSIG) 236#elif defined MAXSIG
208# define EV_NSIG (MAXSIG+1) 237# define EV_NSIG (MAXSIG+1)
209#elif defined (MAX_SIG) 238#elif defined MAX_SIG
210# define EV_NSIG (MAX_SIG+1) 239# define EV_NSIG (MAX_SIG+1)
211#elif defined (SIGARRAYSIZE) 240#elif defined SIGARRAYSIZE
212# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 241# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
213#elif defined (_sys_nsig) 242#elif defined _sys_nsig
214# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 243# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
215#else 244#else
216# error "unable to find value for NSIG, please report" 245# error "unable to find value for NSIG, please report"
217/* to make it compile regardless, just remove the above line, */ 246/* to make it compile regardless, just remove the above line, */
218/* but consider reporting it, too! :) */ 247/* but consider reporting it, too! :) */
219# define EV_NSIG 65 248# define EV_NSIG 65
220#endif 249#endif
221 250
251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
253#endif
254
222#ifndef EV_USE_CLOCK_SYSCALL 255#ifndef EV_USE_CLOCK_SYSCALL
223# if __linux && __GLIBC__ >= 2 256# if __linux && __GLIBC__ >= 2
224# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
225# else 258# else
226# define EV_USE_CLOCK_SYSCALL 0 259# define EV_USE_CLOCK_SYSCALL 0
227# endif 260# endif
228#endif 261#endif
229 262
230#ifndef EV_USE_MONOTONIC 263#ifndef EV_USE_MONOTONIC
231# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 264# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
232# define EV_USE_MONOTONIC EV_FEATURE_OS 265# define EV_USE_MONOTONIC EV_FEATURE_OS
233# else 266# else
234# define EV_USE_MONOTONIC 0 267# define EV_USE_MONOTONIC 0
235# endif 268# endif
236#endif 269#endif
… …
361# undef EV_USE_INOTIFY 394# undef EV_USE_INOTIFY
362# define EV_USE_INOTIFY 0 395# define EV_USE_INOTIFY 0
363#endif 396#endif
364 397
365#if !EV_USE_NANOSLEEP 398#if !EV_USE_NANOSLEEP
366# ifndef _WIN32 399/* hp-ux has it in sys/time.h, which we unconditionally include above */
400# if !defined _WIN32 && !defined __hpux
367# include <sys/select.h> 401# include <sys/select.h>
368# endif 402# endif
369#endif 403#endif
370 404
371#if EV_USE_INOTIFY 405#if EV_USE_INOTIFY
372# include <sys/utsname.h>
373# include <sys/statfs.h> 406# include <sys/statfs.h>
374# include <sys/inotify.h> 407# include <sys/inotify.h>
375/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 408/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
376# ifndef IN_DONT_FOLLOW 409# ifndef IN_DONT_FOLLOW
377# undef EV_USE_INOTIFY 410# undef EV_USE_INOTIFY
… …
394# define EFD_CLOEXEC O_CLOEXEC 427# define EFD_CLOEXEC O_CLOEXEC
395# else 428# else
396# define EFD_CLOEXEC 02000000 429# define EFD_CLOEXEC 02000000
397# endif 430# endif
398# endif 431# endif
399# ifdef __cplusplus
400extern "C" {
401# endif
402int (eventfd) (unsigned int initval, int flags); 432EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
403# ifdef __cplusplus
404}
405# endif
406#endif 433#endif
407 434
408#if EV_USE_SIGNALFD 435#if EV_USE_SIGNALFD
409/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 436/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
410# include <stdint.h> 437# include <stdint.h>
… …
416# define SFD_CLOEXEC O_CLOEXEC 443# define SFD_CLOEXEC O_CLOEXEC
417# else 444# else
418# define SFD_CLOEXEC 02000000 445# define SFD_CLOEXEC 02000000
419# endif 446# endif
420# endif 447# endif
421# ifdef __cplusplus
422extern "C" {
423# endif
424int signalfd (int fd, const sigset_t *mask, int flags); 448EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
425 449
426struct signalfd_siginfo 450struct signalfd_siginfo
427{ 451{
428 uint32_t ssi_signo; 452 uint32_t ssi_signo;
429 char pad[128 - sizeof (uint32_t)]; 453 char pad[128 - sizeof (uint32_t)];
430}; 454};
431# ifdef __cplusplus
432}
433# endif 455#endif
434#endif
435
436 456
437/**/ 457/**/
438 458
439#if EV_VERIFY >= 3 459#if EV_VERIFY >= 3
440# define EV_FREQUENT_CHECK ev_verify (EV_A) 460# define EV_FREQUENT_CHECK ev_verify (EV_A)
441#else 461#else
442# define EV_FREQUENT_CHECK do { } while (0) 462# define EV_FREQUENT_CHECK do { } while (0)
443#endif 463#endif
444 464
445/* 465/*
446 * This is used to avoid floating point rounding problems. 466 * This is used to work around floating point rounding problems.
447 * It is added to ev_rt_now when scheduling periodics
448 * to ensure progress, time-wise, even when rounding
449 * errors are against us.
450 * This value is good at least till the year 4000. 467 * This value is good at least till the year 4000.
451 * Better solutions welcome.
452 */ 468 */
453#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 469#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
470/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
454 471
455#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 472#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
456#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 473#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
457 474
475#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
476#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
477
478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
479/* ECB.H BEGIN */
480/*
481 * libecb - http://software.schmorp.de/pkg/libecb
482 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved.
486 *
487 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met:
489 *
490 * 1. Redistributions of source code must retain the above copyright notice,
491 * this list of conditions and the following disclaimer.
492 *
493 * 2. Redistributions in binary form must reproduce the above copyright
494 * notice, this list of conditions and the following disclaimer in the
495 * documentation and/or other materials provided with the distribution.
496 *
497 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
498 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
499 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
500 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
501 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
505 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE.
507 */
508
509#ifndef ECB_H
510#define ECB_H
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
458#if __GNUC__ >= 4 519 #if __GNUC__
459# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
460# define noinline __attribute__ ((noinline)) 521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
461#else 526#else
462# define expect(expr,value) (expr) 527 #include <inttypes.h>
463# define noinline
464# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
465# define inline
466# endif 528#endif
529
530/* many compilers define _GNUC_ to some versions but then only implement
531 * what their idiot authors think are the "more important" extensions,
532 * causing enormous grief in return for some better fake benchmark numbers.
533 * or so.
534 * we try to detect these and simply assume they are not gcc - if they have
535 * an issue with that they should have done it right in the first place.
536 */
537#ifndef ECB_GCC_VERSION
538 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
539 #define ECB_GCC_VERSION(major,minor) 0
540 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
467#endif 542 #endif
543#endif
468 544
545/*****************************************************************************/
546
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549
550#if ECB_NO_THREADS
551# define ECB_NO_SMP 1
552#endif
553
554#if ECB_NO_THREADS || ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0)
556#endif
557
558#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
571 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
574 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
576 #elif __sparc || __sparc__
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined(__s390__) || defined(__s390x__)
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #elif defined(__mips__)
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
584 #endif
585 #endif
586#endif
587
588#ifndef ECB_MEMORY_FENCE
589 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
590 #define ECB_MEMORY_FENCE __sync_synchronize ()
591 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
592 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
593 #elif _MSC_VER >= 1400 /* VC++ 2005 */
594 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
595 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
596 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
597 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
598 #elif defined(_WIN32)
599 #include <WinNT.h>
600 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
601 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
602 #include <mbarrier.h>
603 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
604 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
605 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
606 #elif __xlC__
607 #define ECB_MEMORY_FENCE __sync ()
608 #endif
609#endif
610
611#ifndef ECB_MEMORY_FENCE
612 #if !ECB_AVOID_PTHREADS
613 /*
614 * if you get undefined symbol references to pthread_mutex_lock,
615 * or failure to find pthread.h, then you should implement
616 * the ECB_MEMORY_FENCE operations for your cpu/compiler
617 * OR provide pthread.h and link against the posix thread library
618 * of your system.
619 */
620 #include <pthread.h>
621 #define ECB_NEEDS_PTHREADS 1
622 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
623
624 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
625 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
626 #endif
627#endif
628
629#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
630 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
631#endif
632
633#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
634 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
635#endif
636
637/*****************************************************************************/
638
639#define ECB_C99 (__STDC_VERSION__ >= 199901L)
640
641#if __cplusplus
642 #define ecb_inline static inline
643#elif ECB_GCC_VERSION(2,5)
644 #define ecb_inline static __inline__
645#elif ECB_C99
646 #define ecb_inline static inline
647#else
648 #define ecb_inline static
649#endif
650
651#if ECB_GCC_VERSION(3,3)
652 #define ecb_restrict __restrict__
653#elif ECB_C99
654 #define ecb_restrict restrict
655#else
656 #define ecb_restrict
657#endif
658
659typedef int ecb_bool;
660
661#define ECB_CONCAT_(a, b) a ## b
662#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
663#define ECB_STRINGIFY_(a) # a
664#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
665
666#define ecb_function_ ecb_inline
667
668#if ECB_GCC_VERSION(3,1)
669 #define ecb_attribute(attrlist) __attribute__(attrlist)
670 #define ecb_is_constant(expr) __builtin_constant_p (expr)
671 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
672 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
673#else
674 #define ecb_attribute(attrlist)
675 #define ecb_is_constant(expr) 0
676 #define ecb_expect(expr,value) (expr)
677 #define ecb_prefetch(addr,rw,locality)
678#endif
679
680/* no emulation for ecb_decltype */
681#if ECB_GCC_VERSION(4,5)
682 #define ecb_decltype(x) __decltype(x)
683#elif ECB_GCC_VERSION(3,0)
684 #define ecb_decltype(x) __typeof(x)
685#endif
686
687#define ecb_noinline ecb_attribute ((__noinline__))
688#define ecb_noreturn ecb_attribute ((__noreturn__))
689#define ecb_unused ecb_attribute ((__unused__))
690#define ecb_const ecb_attribute ((__const__))
691#define ecb_pure ecb_attribute ((__pure__))
692
693#if ECB_GCC_VERSION(4,3)
694 #define ecb_artificial ecb_attribute ((__artificial__))
695 #define ecb_hot ecb_attribute ((__hot__))
696 #define ecb_cold ecb_attribute ((__cold__))
697#else
698 #define ecb_artificial
699 #define ecb_hot
700 #define ecb_cold
701#endif
702
703/* put around conditional expressions if you are very sure that the */
704/* expression is mostly true or mostly false. note that these return */
705/* booleans, not the expression. */
469#define expect_false(expr) expect ((expr) != 0, 0) 706#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
470#define expect_true(expr) expect ((expr) != 0, 1) 707#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
708/* for compatibility to the rest of the world */
709#define ecb_likely(expr) ecb_expect_true (expr)
710#define ecb_unlikely(expr) ecb_expect_false (expr)
711
712/* count trailing zero bits and count # of one bits */
713#if ECB_GCC_VERSION(3,4)
714 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
715 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
716 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
717 #define ecb_ctz32(x) __builtin_ctz (x)
718 #define ecb_ctz64(x) __builtin_ctzll (x)
719 #define ecb_popcount32(x) __builtin_popcount (x)
720 /* no popcountll */
721#else
722 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
723 ecb_function_ int
724 ecb_ctz32 (uint32_t x)
725 {
726 int r = 0;
727
728 x &= ~x + 1; /* this isolates the lowest bit */
729
730#if ECB_branchless_on_i386
731 r += !!(x & 0xaaaaaaaa) << 0;
732 r += !!(x & 0xcccccccc) << 1;
733 r += !!(x & 0xf0f0f0f0) << 2;
734 r += !!(x & 0xff00ff00) << 3;
735 r += !!(x & 0xffff0000) << 4;
736#else
737 if (x & 0xaaaaaaaa) r += 1;
738 if (x & 0xcccccccc) r += 2;
739 if (x & 0xf0f0f0f0) r += 4;
740 if (x & 0xff00ff00) r += 8;
741 if (x & 0xffff0000) r += 16;
742#endif
743
744 return r;
745 }
746
747 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
748 ecb_function_ int
749 ecb_ctz64 (uint64_t x)
750 {
751 int shift = x & 0xffffffffU ? 0 : 32;
752 return ecb_ctz32 (x >> shift) + shift;
753 }
754
755 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
756 ecb_function_ int
757 ecb_popcount32 (uint32_t x)
758 {
759 x -= (x >> 1) & 0x55555555;
760 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
761 x = ((x >> 4) + x) & 0x0f0f0f0f;
762 x *= 0x01010101;
763
764 return x >> 24;
765 }
766
767 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
768 ecb_function_ int ecb_ld32 (uint32_t x)
769 {
770 int r = 0;
771
772 if (x >> 16) { x >>= 16; r += 16; }
773 if (x >> 8) { x >>= 8; r += 8; }
774 if (x >> 4) { x >>= 4; r += 4; }
775 if (x >> 2) { x >>= 2; r += 2; }
776 if (x >> 1) { r += 1; }
777
778 return r;
779 }
780
781 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
782 ecb_function_ int ecb_ld64 (uint64_t x)
783 {
784 int r = 0;
785
786 if (x >> 32) { x >>= 32; r += 32; }
787
788 return r + ecb_ld32 (x);
789 }
790#endif
791
792ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
793ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
794{
795 return ( (x * 0x0802U & 0x22110U)
796 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
797}
798
799ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
800ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
801{
802 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
803 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
804 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
805 x = ( x >> 8 ) | ( x << 8);
806
807 return x;
808}
809
810ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
811ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
812{
813 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
814 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
815 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
816 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
817 x = ( x >> 16 ) | ( x << 16);
818
819 return x;
820}
821
822/* popcount64 is only available on 64 bit cpus as gcc builtin */
823/* so for this version we are lazy */
824ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
825ecb_function_ int
826ecb_popcount64 (uint64_t x)
827{
828 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
829}
830
831ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
832ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
833ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
834ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
835ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
836ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
837ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
838ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
839
840ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
841ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
842ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
843ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
844ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
845ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
846ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
847ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
848
849#if ECB_GCC_VERSION(4,3)
850 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
851 #define ecb_bswap32(x) __builtin_bswap32 (x)
852 #define ecb_bswap64(x) __builtin_bswap64 (x)
853#else
854 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
855 ecb_function_ uint16_t
856 ecb_bswap16 (uint16_t x)
857 {
858 return ecb_rotl16 (x, 8);
859 }
860
861 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
862 ecb_function_ uint32_t
863 ecb_bswap32 (uint32_t x)
864 {
865 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
866 }
867
868 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
869 ecb_function_ uint64_t
870 ecb_bswap64 (uint64_t x)
871 {
872 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
873 }
874#endif
875
876#if ECB_GCC_VERSION(4,5)
877 #define ecb_unreachable() __builtin_unreachable ()
878#else
879 /* this seems to work fine, but gcc always emits a warning for it :/ */
880 ecb_inline void ecb_unreachable (void) ecb_noreturn;
881 ecb_inline void ecb_unreachable (void) { }
882#endif
883
884/* try to tell the compiler that some condition is definitely true */
885#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
886
887ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
888ecb_inline unsigned char
889ecb_byteorder_helper (void)
890{
891 const uint32_t u = 0x11223344;
892 return *(unsigned char *)&u;
893}
894
895ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
896ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
897ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
898ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
899
900#if ECB_GCC_VERSION(3,0) || ECB_C99
901 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
902#else
903 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
904#endif
905
906#if __cplusplus
907 template<typename T>
908 static inline T ecb_div_rd (T val, T div)
909 {
910 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
911 }
912 template<typename T>
913 static inline T ecb_div_ru (T val, T div)
914 {
915 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
916 }
917#else
918 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
919 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
920#endif
921
922#if ecb_cplusplus_does_not_suck
923 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
924 template<typename T, int N>
925 static inline int ecb_array_length (const T (&arr)[N])
926 {
927 return N;
928 }
929#else
930 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
931#endif
932
933#endif
934
935/* ECB.H END */
936
937#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
938/* if your architecture doesn't need memory fences, e.g. because it is
939 * single-cpu/core, or if you use libev in a project that doesn't use libev
940 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
941 * libev, in which cases the memory fences become nops.
942 * alternatively, you can remove this #error and link against libpthread,
943 * which will then provide the memory fences.
944 */
945# error "memory fences not defined for your architecture, please report"
946#endif
947
948#ifndef ECB_MEMORY_FENCE
949# define ECB_MEMORY_FENCE do { } while (0)
950# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
951# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
952#endif
953
954#define expect_false(cond) ecb_expect_false (cond)
955#define expect_true(cond) ecb_expect_true (cond)
956#define noinline ecb_noinline
957
471#define inline_size static inline 958#define inline_size ecb_inline
472 959
473#if EV_FEATURE_CODE 960#if EV_FEATURE_CODE
474# define inline_speed static inline 961# define inline_speed ecb_inline
475#else 962#else
476# define inline_speed static noinline 963# define inline_speed static noinline
477#endif 964#endif
478 965
479#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 966#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
494#define ev_active(w) ((W)(w))->active 981#define ev_active(w) ((W)(w))->active
495#define ev_at(w) ((WT)(w))->at 982#define ev_at(w) ((WT)(w))->at
496 983
497#if EV_USE_REALTIME 984#if EV_USE_REALTIME
498/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 985/* 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 */ 986/* giving it a reasonably high chance of working on typical architectures */
500static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 987static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
501#endif 988#endif
502 989
503#if EV_USE_MONOTONIC 990#if EV_USE_MONOTONIC
504static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 991static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
518# include "ev_win32.c" 1005# include "ev_win32.c"
519#endif 1006#endif
520 1007
521/*****************************************************************************/ 1008/*****************************************************************************/
522 1009
1010/* define a suitable floor function (only used by periodics atm) */
1011
1012#if EV_USE_FLOOR
1013# include <math.h>
1014# define ev_floor(v) floor (v)
1015#else
1016
1017#include <float.h>
1018
1019/* a floor() replacement function, should be independent of ev_tstamp type */
1020static ev_tstamp noinline
1021ev_floor (ev_tstamp v)
1022{
1023 /* the choice of shift factor is not terribly important */
1024#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1025 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1026#else
1027 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1028#endif
1029
1030 /* argument too large for an unsigned long? */
1031 if (expect_false (v >= shift))
1032 {
1033 ev_tstamp f;
1034
1035 if (v == v - 1.)
1036 return v; /* very large number */
1037
1038 f = shift * ev_floor (v * (1. / shift));
1039 return f + ev_floor (v - f);
1040 }
1041
1042 /* special treatment for negative args? */
1043 if (expect_false (v < 0.))
1044 {
1045 ev_tstamp f = -ev_floor (-v);
1046
1047 return f - (f == v ? 0 : 1);
1048 }
1049
1050 /* fits into an unsigned long */
1051 return (unsigned long)v;
1052}
1053
1054#endif
1055
1056/*****************************************************************************/
1057
1058#ifdef __linux
1059# include <sys/utsname.h>
1060#endif
1061
1062static unsigned int noinline ecb_cold
1063ev_linux_version (void)
1064{
1065#ifdef __linux
1066 unsigned int v = 0;
1067 struct utsname buf;
1068 int i;
1069 char *p = buf.release;
1070
1071 if (uname (&buf))
1072 return 0;
1073
1074 for (i = 3+1; --i; )
1075 {
1076 unsigned int c = 0;
1077
1078 for (;;)
1079 {
1080 if (*p >= '0' && *p <= '9')
1081 c = c * 10 + *p++ - '0';
1082 else
1083 {
1084 p += *p == '.';
1085 break;
1086 }
1087 }
1088
1089 v = (v << 8) | c;
1090 }
1091
1092 return v;
1093#else
1094 return 0;
1095#endif
1096}
1097
1098/*****************************************************************************/
1099
523#if EV_AVOID_STDIO 1100#if EV_AVOID_STDIO
524static void noinline 1101static void noinline ecb_cold
525ev_printerr (const char *msg) 1102ev_printerr (const char *msg)
526{ 1103{
527 write (STDERR_FILENO, msg, strlen (msg)); 1104 write (STDERR_FILENO, msg, strlen (msg));
528} 1105}
529#endif 1106#endif
530 1107
531static void (*syserr_cb)(const char *msg); 1108static void (*syserr_cb)(const char *msg);
532 1109
533void 1110void ecb_cold
534ev_set_syserr_cb (void (*cb)(const char *msg)) 1111ev_set_syserr_cb (void (*cb)(const char *msg))
535{ 1112{
536 syserr_cb = cb; 1113 syserr_cb = cb;
537} 1114}
538 1115
539static void noinline 1116static void noinline ecb_cold
540ev_syserr (const char *msg) 1117ev_syserr (const char *msg)
541{ 1118{
542 if (!msg) 1119 if (!msg)
543 msg = "(libev) system error"; 1120 msg = "(libev) system error";
544 1121
545 if (syserr_cb) 1122 if (syserr_cb)
546 syserr_cb (msg); 1123 syserr_cb (msg);
547 else 1124 else
548 { 1125 {
549#if EV_AVOID_STDIO 1126#if EV_AVOID_STDIO
550 const char *err = strerror (errno);
551
552 ev_printerr (msg); 1127 ev_printerr (msg);
553 ev_printerr (": "); 1128 ev_printerr (": ");
554 ev_printerr (err); 1129 ev_printerr (strerror (errno));
555 ev_printerr ("\n"); 1130 ev_printerr ("\n");
556#else 1131#else
557 perror (msg); 1132 perror (msg);
558#endif 1133#endif
559 abort (); 1134 abort ();
… …
579#endif 1154#endif
580} 1155}
581 1156
582static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1157static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
583 1158
584void 1159void ecb_cold
585ev_set_allocator (void *(*cb)(void *ptr, long size)) 1160ev_set_allocator (void *(*cb)(void *ptr, long size))
586{ 1161{
587 alloc = cb; 1162 alloc = cb;
588} 1163}
589 1164
… …
593 ptr = alloc (ptr, size); 1168 ptr = alloc (ptr, size);
594 1169
595 if (!ptr && size) 1170 if (!ptr && size)
596 { 1171 {
597#if EV_AVOID_STDIO 1172#if EV_AVOID_STDIO
598 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1173 ev_printerr ("(libev) memory allocation failed, aborting.\n");
599#else 1174#else
600 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1175 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
601#endif 1176#endif
602 abort (); 1177 abort ();
603 } 1178 }
604 1179
605 return ptr; 1180 return ptr;
… …
622 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1197 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
623 unsigned char unused; 1198 unsigned char unused;
624#if EV_USE_EPOLL 1199#if EV_USE_EPOLL
625 unsigned int egen; /* generation counter to counter epoll bugs */ 1200 unsigned int egen; /* generation counter to counter epoll bugs */
626#endif 1201#endif
627#if EV_SELECT_IS_WINSOCKET 1202#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
628 SOCKET handle; 1203 SOCKET handle;
1204#endif
1205#if EV_USE_IOCP
1206 OVERLAPPED or, ow;
629#endif 1207#endif
630} ANFD; 1208} ANFD;
631 1209
632/* stores the pending event set for a given watcher */ 1210/* stores the pending event set for a given watcher */
633typedef struct 1211typedef struct
… …
675 #undef VAR 1253 #undef VAR
676 }; 1254 };
677 #include "ev_wrap.h" 1255 #include "ev_wrap.h"
678 1256
679 static struct ev_loop default_loop_struct; 1257 static struct ev_loop default_loop_struct;
680 struct ev_loop *ev_default_loop_ptr; 1258 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
681 1259
682#else 1260#else
683 1261
684 ev_tstamp ev_rt_now; 1262 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
685 #define VAR(name,decl) static decl; 1263 #define VAR(name,decl) static decl;
686 #include "ev_vars.h" 1264 #include "ev_vars.h"
687 #undef VAR 1265 #undef VAR
688 1266
689 static int ev_default_loop_ptr; 1267 static int ev_default_loop_ptr;
… …
698# define EV_RELEASE_CB (void)0 1276# define EV_RELEASE_CB (void)0
699# define EV_ACQUIRE_CB (void)0 1277# define EV_ACQUIRE_CB (void)0
700# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1278# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
701#endif 1279#endif
702 1280
703#define EVUNLOOP_RECURSE 0x80 1281#define EVBREAK_RECURSE 0x80
704 1282
705/*****************************************************************************/ 1283/*****************************************************************************/
706 1284
707#ifndef EV_HAVE_EV_TIME 1285#ifndef EV_HAVE_EV_TIME
708ev_tstamp 1286ev_tstamp
… …
752 if (delay > 0.) 1330 if (delay > 0.)
753 { 1331 {
754#if EV_USE_NANOSLEEP 1332#if EV_USE_NANOSLEEP
755 struct timespec ts; 1333 struct timespec ts;
756 1334
757 ts.tv_sec = (time_t)delay; 1335 EV_TS_SET (ts, delay);
758 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
759
760 nanosleep (&ts, 0); 1336 nanosleep (&ts, 0);
761#elif defined(_WIN32) 1337#elif defined _WIN32
762 Sleep ((unsigned long)(delay * 1e3)); 1338 Sleep ((unsigned long)(delay * 1e3));
763#else 1339#else
764 struct timeval tv; 1340 struct timeval tv;
765 1341
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 */ 1342 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770 /* something not guaranteed by newer posix versions, but guaranteed */ 1343 /* something not guaranteed by newer posix versions, but guaranteed */
771 /* by older ones */ 1344 /* by older ones */
1345 EV_TV_SET (tv, delay);
772 select (0, 0, 0, 0, &tv); 1346 select (0, 0, 0, 0, &tv);
773#endif 1347#endif
774 } 1348 }
775} 1349}
776 1350
777/*****************************************************************************/ 1351/*****************************************************************************/
778 1352
779#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1353#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
780 1354
781/* find a suitable new size for the given array, */ 1355/* find a suitable new size for the given array, */
782/* hopefully by rounding to a ncie-to-malloc size */ 1356/* hopefully by rounding to a nice-to-malloc size */
783inline_size int 1357inline_size int
784array_nextsize (int elem, int cur, int cnt) 1358array_nextsize (int elem, int cur, int cnt)
785{ 1359{
786 int ncur = cur + 1; 1360 int ncur = cur + 1;
787 1361
788 do 1362 do
789 ncur <<= 1; 1363 ncur <<= 1;
790 while (cnt > ncur); 1364 while (cnt > ncur);
791 1365
792 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1366 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
793 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1367 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
794 { 1368 {
795 ncur *= elem; 1369 ncur *= elem;
796 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1370 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
797 ncur = ncur - sizeof (void *) * 4; 1371 ncur = ncur - sizeof (void *) * 4;
… …
799 } 1373 }
800 1374
801 return ncur; 1375 return ncur;
802} 1376}
803 1377
804static noinline void * 1378static void * noinline ecb_cold
805array_realloc (int elem, void *base, int *cur, int cnt) 1379array_realloc (int elem, void *base, int *cur, int cnt)
806{ 1380{
807 *cur = array_nextsize (elem, *cur, cnt); 1381 *cur = array_nextsize (elem, *cur, cnt);
808 return ev_realloc (base, elem * *cur); 1382 return ev_realloc (base, elem * *cur);
809} 1383}
… …
812 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1386 memset ((void *)(base), 0, sizeof (*(base)) * (count))
813 1387
814#define array_needsize(type,base,cur,cnt,init) \ 1388#define array_needsize(type,base,cur,cnt,init) \
815 if (expect_false ((cnt) > (cur))) \ 1389 if (expect_false ((cnt) > (cur))) \
816 { \ 1390 { \
817 int ocur_ = (cur); \ 1391 int ecb_unused ocur_ = (cur); \
818 (base) = (type *)array_realloc \ 1392 (base) = (type *)array_realloc \
819 (sizeof (type), (base), &(cur), (cnt)); \ 1393 (sizeof (type), (base), &(cur), (cnt)); \
820 init ((base) + (ocur_), (cur) - ocur_); \ 1394 init ((base) + (ocur_), (cur) - ocur_); \
821 } 1395 }
822 1396
… …
922inline_size void 1496inline_size void
923fd_reify (EV_P) 1497fd_reify (EV_P)
924{ 1498{
925 int i; 1499 int i;
926 1500
1501#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1502 for (i = 0; i < fdchangecnt; ++i)
1503 {
1504 int fd = fdchanges [i];
1505 ANFD *anfd = anfds + fd;
1506
1507 if (anfd->reify & EV__IOFDSET && anfd->head)
1508 {
1509 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1510
1511 if (handle != anfd->handle)
1512 {
1513 unsigned long arg;
1514
1515 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1516
1517 /* handle changed, but fd didn't - we need to do it in two steps */
1518 backend_modify (EV_A_ fd, anfd->events, 0);
1519 anfd->events = 0;
1520 anfd->handle = handle;
1521 }
1522 }
1523 }
1524#endif
1525
927 for (i = 0; i < fdchangecnt; ++i) 1526 for (i = 0; i < fdchangecnt; ++i)
928 { 1527 {
929 int fd = fdchanges [i]; 1528 int fd = fdchanges [i];
930 ANFD *anfd = anfds + fd; 1529 ANFD *anfd = anfds + fd;
931 ev_io *w; 1530 ev_io *w;
932 1531
933 unsigned char events = 0; 1532 unsigned char o_events = anfd->events;
1533 unsigned char o_reify = anfd->reify;
934 1534
935 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1535 anfd->reify = 0;
936 events |= (unsigned char)w->events;
937 1536
938#if EV_SELECT_IS_WINSOCKET 1537 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
939 if (events)
940 { 1538 {
941 unsigned long arg; 1539 anfd->events = 0;
942 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1540
943 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1541 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1542 anfd->events |= (unsigned char)w->events;
1543
1544 if (o_events != anfd->events)
1545 o_reify = EV__IOFDSET; /* actually |= */
944 } 1546 }
945#endif
946 1547
947 { 1548 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); 1549 backend_modify (EV_A_ fd, o_events, anfd->events);
956 }
957 } 1550 }
958 1551
959 fdchangecnt = 0; 1552 fdchangecnt = 0;
960} 1553}
961 1554
… …
973 fdchanges [fdchangecnt - 1] = fd; 1566 fdchanges [fdchangecnt - 1] = fd;
974 } 1567 }
975} 1568}
976 1569
977/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1570/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
978inline_speed void 1571inline_speed void ecb_cold
979fd_kill (EV_P_ int fd) 1572fd_kill (EV_P_ int fd)
980{ 1573{
981 ev_io *w; 1574 ev_io *w;
982 1575
983 while ((w = (ev_io *)anfds [fd].head)) 1576 while ((w = (ev_io *)anfds [fd].head))
… …
986 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1579 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
987 } 1580 }
988} 1581}
989 1582
990/* check whether the given fd is actually valid, for error recovery */ 1583/* check whether the given fd is actually valid, for error recovery */
991inline_size int 1584inline_size int ecb_cold
992fd_valid (int fd) 1585fd_valid (int fd)
993{ 1586{
994#ifdef _WIN32 1587#ifdef _WIN32
995 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1588 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
996#else 1589#else
997 return fcntl (fd, F_GETFD) != -1; 1590 return fcntl (fd, F_GETFD) != -1;
998#endif 1591#endif
999} 1592}
1000 1593
1001/* called on EBADF to verify fds */ 1594/* called on EBADF to verify fds */
1002static void noinline 1595static void noinline ecb_cold
1003fd_ebadf (EV_P) 1596fd_ebadf (EV_P)
1004{ 1597{
1005 int fd; 1598 int fd;
1006 1599
1007 for (fd = 0; fd < anfdmax; ++fd) 1600 for (fd = 0; fd < anfdmax; ++fd)
… …
1009 if (!fd_valid (fd) && errno == EBADF) 1602 if (!fd_valid (fd) && errno == EBADF)
1010 fd_kill (EV_A_ fd); 1603 fd_kill (EV_A_ fd);
1011} 1604}
1012 1605
1013/* called on ENOMEM in select/poll to kill some fds and retry */ 1606/* called on ENOMEM in select/poll to kill some fds and retry */
1014static void noinline 1607static void noinline ecb_cold
1015fd_enomem (EV_P) 1608fd_enomem (EV_P)
1016{ 1609{
1017 int fd; 1610 int fd;
1018 1611
1019 for (fd = anfdmax; fd--; ) 1612 for (fd = anfdmax; fd--; )
… …
1054} 1647}
1055 1648
1056/*****************************************************************************/ 1649/*****************************************************************************/
1057 1650
1058/* 1651/*
1059 * the heap functions want a real array index. array index 0 uis guaranteed to not 1652 * 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 1653 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1061 * the branching factor of the d-tree. 1654 * the branching factor of the d-tree.
1062 */ 1655 */
1063 1656
1064/* 1657/*
… …
1214 1807
1215/*****************************************************************************/ 1808/*****************************************************************************/
1216 1809
1217#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 1810#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1218 1811
1219static void noinline 1812static void noinline ecb_cold
1220evpipe_init (EV_P) 1813evpipe_init (EV_P)
1221{ 1814{
1222 if (!ev_is_active (&pipe_w)) 1815 if (!ev_is_active (&pipe_w))
1223 { 1816 {
1224# if EV_USE_EVENTFD 1817# if EV_USE_EVENTFD
… …
1246 ev_io_start (EV_A_ &pipe_w); 1839 ev_io_start (EV_A_ &pipe_w);
1247 ev_unref (EV_A); /* watcher should not keep loop alive */ 1840 ev_unref (EV_A); /* watcher should not keep loop alive */
1248 } 1841 }
1249} 1842}
1250 1843
1251inline_size void 1844inline_speed void
1252evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1845evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253{ 1846{
1254 if (!*flag) 1847 if (expect_true (*flag))
1848 return;
1849
1850 *flag = 1;
1851
1852 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1853
1854 pipe_write_skipped = 1;
1855
1856 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1857
1858 if (pipe_write_wanted)
1255 { 1859 {
1860 int old_errno;
1861
1862 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1863
1256 int old_errno = errno; /* save errno because write might clobber it */ 1864 old_errno = errno; /* save errno because write will clobber it */
1257 char dummy;
1258
1259 *flag = 1;
1260 1865
1261#if EV_USE_EVENTFD 1866#if EV_USE_EVENTFD
1262 if (evfd >= 0) 1867 if (evfd >= 0)
1263 { 1868 {
1264 uint64_t counter = 1; 1869 uint64_t counter = 1;
1265 write (evfd, &counter, sizeof (uint64_t)); 1870 write (evfd, &counter, sizeof (uint64_t));
1266 } 1871 }
1267 else 1872 else
1268#endif 1873#endif
1874 {
1875 /* win32 people keep sending patches that change this write() to send() */
1876 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1877 /* so when you think this write should be a send instead, please find out */
1878 /* where your send() is from - it's definitely not the microsoft send, and */
1879 /* tell me. thank you. */
1880 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1881 /* check the ev documentation on how to use this flag */
1269 write (evpipe [1], &dummy, 1); 1882 write (evpipe [1], &(evpipe [1]), 1);
1883 }
1270 1884
1271 errno = old_errno; 1885 errno = old_errno;
1272 } 1886 }
1273} 1887}
1274 1888
… …
1277static void 1891static void
1278pipecb (EV_P_ ev_io *iow, int revents) 1892pipecb (EV_P_ ev_io *iow, int revents)
1279{ 1893{
1280 int i; 1894 int i;
1281 1895
1896 if (revents & EV_READ)
1897 {
1282#if EV_USE_EVENTFD 1898#if EV_USE_EVENTFD
1283 if (evfd >= 0) 1899 if (evfd >= 0)
1284 { 1900 {
1285 uint64_t counter; 1901 uint64_t counter;
1286 read (evfd, &counter, sizeof (uint64_t)); 1902 read (evfd, &counter, sizeof (uint64_t));
1287 } 1903 }
1288 else 1904 else
1289#endif 1905#endif
1290 { 1906 {
1291 char dummy; 1907 char dummy;
1908 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1292 read (evpipe [0], &dummy, 1); 1909 read (evpipe [0], &dummy, 1);
1910 }
1293 } 1911 }
1294 1912
1913 pipe_write_skipped = 0;
1914
1915#if EV_SIGNAL_ENABLE
1295 if (sig_pending) 1916 if (sig_pending)
1296 { 1917 {
1297 sig_pending = 0; 1918 sig_pending = 0;
1298 1919
1299 for (i = EV_NSIG - 1; i--; ) 1920 for (i = EV_NSIG - 1; i--; )
1300 if (expect_false (signals [i].pending)) 1921 if (expect_false (signals [i].pending))
1301 ev_feed_signal_event (EV_A_ i + 1); 1922 ev_feed_signal_event (EV_A_ i + 1);
1302 } 1923 }
1924#endif
1303 1925
1304#if EV_ASYNC_ENABLE 1926#if EV_ASYNC_ENABLE
1305 if (async_pending) 1927 if (async_pending)
1306 { 1928 {
1307 async_pending = 0; 1929 async_pending = 0;
… …
1316#endif 1938#endif
1317} 1939}
1318 1940
1319/*****************************************************************************/ 1941/*****************************************************************************/
1320 1942
1943void
1944ev_feed_signal (int signum)
1945{
1946#if EV_MULTIPLICITY
1947 EV_P = signals [signum - 1].loop;
1948
1949 if (!EV_A)
1950 return;
1951#endif
1952
1953 if (!ev_active (&pipe_w))
1954 return;
1955
1956 signals [signum - 1].pending = 1;
1957 evpipe_write (EV_A_ &sig_pending);
1958}
1959
1321static void 1960static void
1322ev_sighandler (int signum) 1961ev_sighandler (int signum)
1323{ 1962{
1324#if EV_MULTIPLICITY
1325 EV_P = signals [signum - 1].loop;
1326#endif
1327
1328#ifdef _WIN32 1963#ifdef _WIN32
1329 signal (signum, ev_sighandler); 1964 signal (signum, ev_sighandler);
1330#endif 1965#endif
1331 1966
1332 signals [signum - 1].pending = 1; 1967 ev_feed_signal (signum);
1333 evpipe_write (EV_A_ &sig_pending);
1334} 1968}
1335 1969
1336void noinline 1970void noinline
1337ev_feed_signal_event (EV_P_ int signum) 1971ev_feed_signal_event (EV_P_ int signum)
1338{ 1972{
… …
1438 2072
1439#endif 2073#endif
1440 2074
1441/*****************************************************************************/ 2075/*****************************************************************************/
1442 2076
2077#if EV_USE_IOCP
2078# include "ev_iocp.c"
2079#endif
1443#if EV_USE_PORT 2080#if EV_USE_PORT
1444# include "ev_port.c" 2081# include "ev_port.c"
1445#endif 2082#endif
1446#if EV_USE_KQUEUE 2083#if EV_USE_KQUEUE
1447# include "ev_kqueue.c" 2084# include "ev_kqueue.c"
… …
1454#endif 2091#endif
1455#if EV_USE_SELECT 2092#if EV_USE_SELECT
1456# include "ev_select.c" 2093# include "ev_select.c"
1457#endif 2094#endif
1458 2095
1459int 2096int ecb_cold
1460ev_version_major (void) 2097ev_version_major (void)
1461{ 2098{
1462 return EV_VERSION_MAJOR; 2099 return EV_VERSION_MAJOR;
1463} 2100}
1464 2101
1465int 2102int ecb_cold
1466ev_version_minor (void) 2103ev_version_minor (void)
1467{ 2104{
1468 return EV_VERSION_MINOR; 2105 return EV_VERSION_MINOR;
1469} 2106}
1470 2107
1471/* return true if we are running with elevated privileges and should ignore env variables */ 2108/* return true if we are running with elevated privileges and should ignore env variables */
1472int inline_size 2109int inline_size ecb_cold
1473enable_secure (void) 2110enable_secure (void)
1474{ 2111{
1475#ifdef _WIN32 2112#ifdef _WIN32
1476 return 0; 2113 return 0;
1477#else 2114#else
1478 return getuid () != geteuid () 2115 return getuid () != geteuid ()
1479 || getgid () != getegid (); 2116 || getgid () != getegid ();
1480#endif 2117#endif
1481} 2118}
1482 2119
1483unsigned int 2120unsigned int ecb_cold
1484ev_supported_backends (void) 2121ev_supported_backends (void)
1485{ 2122{
1486 unsigned int flags = 0; 2123 unsigned int flags = 0;
1487 2124
1488 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2125 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1492 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2129 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1493 2130
1494 return flags; 2131 return flags;
1495} 2132}
1496 2133
1497unsigned int 2134unsigned int ecb_cold
1498ev_recommended_backends (void) 2135ev_recommended_backends (void)
1499{ 2136{
1500 unsigned int flags = ev_supported_backends (); 2137 unsigned int flags = ev_supported_backends ();
1501 2138
1502#ifndef __NetBSD__ 2139#ifndef __NetBSD__
… …
1507#ifdef __APPLE__ 2144#ifdef __APPLE__
1508 /* only select works correctly on that "unix-certified" platform */ 2145 /* only select works correctly on that "unix-certified" platform */
1509 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2146 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1510 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2147 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1511#endif 2148#endif
2149#ifdef __FreeBSD__
2150 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2151#endif
1512 2152
1513 return flags; 2153 return flags;
1514} 2154}
1515 2155
1516unsigned int 2156unsigned int ecb_cold
1517ev_embeddable_backends (void) 2157ev_embeddable_backends (void)
1518{ 2158{
1519 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2159 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1520 2160
1521 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2161 /* 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 */ 2162 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1523 flags &= ~EVBACKEND_EPOLL; 2163 flags &= ~EVBACKEND_EPOLL;
1524 2164
1525 return flags; 2165 return flags;
1526} 2166}
1527 2167
1528unsigned int 2168unsigned int
… …
1566ev_userdata (EV_P) 2206ev_userdata (EV_P)
1567{ 2207{
1568 return userdata; 2208 return userdata;
1569} 2209}
1570 2210
2211void
1571void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2212ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1572{ 2213{
1573 invoke_cb = invoke_pending_cb; 2214 invoke_cb = invoke_pending_cb;
1574} 2215}
1575 2216
2217void
1576void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2218ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1577{ 2219{
1578 release_cb = release; 2220 release_cb = release;
1579 acquire_cb = acquire; 2221 acquire_cb = acquire;
1580} 2222}
1581#endif 2223#endif
1582 2224
1583/* initialise a loop structure, must be zero-initialised */ 2225/* initialise a loop structure, must be zero-initialised */
1584static void noinline 2226static void noinline ecb_cold
1585loop_init (EV_P_ unsigned int flags) 2227loop_init (EV_P_ unsigned int flags)
1586{ 2228{
1587 if (!backend) 2229 if (!backend)
1588 { 2230 {
2231 origflags = flags;
2232
1589#if EV_USE_REALTIME 2233#if EV_USE_REALTIME
1590 if (!have_realtime) 2234 if (!have_realtime)
1591 { 2235 {
1592 struct timespec ts; 2236 struct timespec ts;
1593 2237
… …
1615 if (!(flags & EVFLAG_NOENV) 2259 if (!(flags & EVFLAG_NOENV)
1616 && !enable_secure () 2260 && !enable_secure ()
1617 && getenv ("LIBEV_FLAGS")) 2261 && getenv ("LIBEV_FLAGS"))
1618 flags = atoi (getenv ("LIBEV_FLAGS")); 2262 flags = atoi (getenv ("LIBEV_FLAGS"));
1619 2263
1620 ev_rt_now = ev_time (); 2264 ev_rt_now = ev_time ();
1621 mn_now = get_clock (); 2265 mn_now = get_clock ();
1622 now_floor = mn_now; 2266 now_floor = mn_now;
1623 rtmn_diff = ev_rt_now - mn_now; 2267 rtmn_diff = ev_rt_now - mn_now;
1624#if EV_FEATURE_API 2268#if EV_FEATURE_API
1625 invoke_cb = ev_invoke_pending; 2269 invoke_cb = ev_invoke_pending;
1626#endif 2270#endif
1627 2271
1628 io_blocktime = 0.; 2272 io_blocktime = 0.;
1629 timeout_blocktime = 0.; 2273 timeout_blocktime = 0.;
1630 backend = 0; 2274 backend = 0;
1631 backend_fd = -1; 2275 backend_fd = -1;
1632 sig_pending = 0; 2276 sig_pending = 0;
1633#if EV_ASYNC_ENABLE 2277#if EV_ASYNC_ENABLE
1634 async_pending = 0; 2278 async_pending = 0;
1635#endif 2279#endif
2280 pipe_write_skipped = 0;
2281 pipe_write_wanted = 0;
1636#if EV_USE_INOTIFY 2282#if EV_USE_INOTIFY
1637 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2283 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1638#endif 2284#endif
1639#if EV_USE_SIGNALFD 2285#if EV_USE_SIGNALFD
1640 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2286 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1641#endif 2287#endif
1642 2288
1643 if (!(flags & 0x0000ffffU)) 2289 if (!(flags & EVBACKEND_MASK))
1644 flags |= ev_recommended_backends (); 2290 flags |= ev_recommended_backends ();
1645 2291
2292#if EV_USE_IOCP
2293 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2294#endif
1646#if EV_USE_PORT 2295#if EV_USE_PORT
1647 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2296 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1648#endif 2297#endif
1649#if EV_USE_KQUEUE 2298#if EV_USE_KQUEUE
1650 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2299 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1667#endif 2316#endif
1668 } 2317 }
1669} 2318}
1670 2319
1671/* free up a loop structure */ 2320/* free up a loop structure */
1672static void noinline 2321void ecb_cold
1673loop_destroy (EV_P) 2322ev_loop_destroy (EV_P)
1674{ 2323{
1675 int i; 2324 int i;
2325
2326#if EV_MULTIPLICITY
2327 /* mimic free (0) */
2328 if (!EV_A)
2329 return;
2330#endif
2331
2332#if EV_CLEANUP_ENABLE
2333 /* queue cleanup watchers (and execute them) */
2334 if (expect_false (cleanupcnt))
2335 {
2336 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2337 EV_INVOKE_PENDING;
2338 }
2339#endif
2340
2341#if EV_CHILD_ENABLE
2342 if (ev_is_active (&childev))
2343 {
2344 ev_ref (EV_A); /* child watcher */
2345 ev_signal_stop (EV_A_ &childev);
2346 }
2347#endif
1676 2348
1677 if (ev_is_active (&pipe_w)) 2349 if (ev_is_active (&pipe_w))
1678 { 2350 {
1679 /*ev_ref (EV_A);*/ 2351 /*ev_ref (EV_A);*/
1680 /*ev_io_stop (EV_A_ &pipe_w);*/ 2352 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1702#endif 2374#endif
1703 2375
1704 if (backend_fd >= 0) 2376 if (backend_fd >= 0)
1705 close (backend_fd); 2377 close (backend_fd);
1706 2378
2379#if EV_USE_IOCP
2380 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2381#endif
1707#if EV_USE_PORT 2382#if EV_USE_PORT
1708 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2383 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1709#endif 2384#endif
1710#if EV_USE_KQUEUE 2385#if EV_USE_KQUEUE
1711 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2386 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1738 array_free (periodic, EMPTY); 2413 array_free (periodic, EMPTY);
1739#endif 2414#endif
1740#if EV_FORK_ENABLE 2415#if EV_FORK_ENABLE
1741 array_free (fork, EMPTY); 2416 array_free (fork, EMPTY);
1742#endif 2417#endif
2418#if EV_CLEANUP_ENABLE
2419 array_free (cleanup, EMPTY);
2420#endif
1743 array_free (prepare, EMPTY); 2421 array_free (prepare, EMPTY);
1744 array_free (check, EMPTY); 2422 array_free (check, EMPTY);
1745#if EV_ASYNC_ENABLE 2423#if EV_ASYNC_ENABLE
1746 array_free (async, EMPTY); 2424 array_free (async, EMPTY);
1747#endif 2425#endif
1748 2426
1749 backend = 0; 2427 backend = 0;
2428
2429#if EV_MULTIPLICITY
2430 if (ev_is_default_loop (EV_A))
2431#endif
2432 ev_default_loop_ptr = 0;
2433#if EV_MULTIPLICITY
2434 else
2435 ev_free (EV_A);
2436#endif
1750} 2437}
1751 2438
1752#if EV_USE_INOTIFY 2439#if EV_USE_INOTIFY
1753inline_size void infy_fork (EV_P); 2440inline_size void infy_fork (EV_P);
1754#endif 2441#endif
… …
1769 infy_fork (EV_A); 2456 infy_fork (EV_A);
1770#endif 2457#endif
1771 2458
1772 if (ev_is_active (&pipe_w)) 2459 if (ev_is_active (&pipe_w))
1773 { 2460 {
1774 /* this "locks" the handlers against writing to the pipe */ 2461 /* 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 2462
1781 ev_ref (EV_A); 2463 ev_ref (EV_A);
1782 ev_io_stop (EV_A_ &pipe_w); 2464 ev_io_stop (EV_A_ &pipe_w);
1783 2465
1784#if EV_USE_EVENTFD 2466#if EV_USE_EVENTFD
… …
1802 postfork = 0; 2484 postfork = 0;
1803} 2485}
1804 2486
1805#if EV_MULTIPLICITY 2487#if EV_MULTIPLICITY
1806 2488
1807struct ev_loop * 2489struct ev_loop * ecb_cold
1808ev_loop_new (unsigned int flags) 2490ev_loop_new (unsigned int flags)
1809{ 2491{
1810 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2492 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1811 2493
1812 memset (EV_A, 0, sizeof (struct ev_loop)); 2494 memset (EV_A, 0, sizeof (struct ev_loop));
1813 loop_init (EV_A_ flags); 2495 loop_init (EV_A_ flags);
1814 2496
1815 if (ev_backend (EV_A)) 2497 if (ev_backend (EV_A))
1816 return EV_A; 2498 return EV_A;
1817 2499
2500 ev_free (EV_A);
1818 return 0; 2501 return 0;
1819} 2502}
1820 2503
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 */ 2504#endif /* multiplicity */
1834 2505
1835#if EV_VERIFY 2506#if EV_VERIFY
1836static void noinline 2507static void noinline ecb_cold
1837verify_watcher (EV_P_ W w) 2508verify_watcher (EV_P_ W w)
1838{ 2509{
1839 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2510 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1840 2511
1841 if (w->pending) 2512 if (w->pending)
1842 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2513 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1843} 2514}
1844 2515
1845static void noinline 2516static void noinline ecb_cold
1846verify_heap (EV_P_ ANHE *heap, int N) 2517verify_heap (EV_P_ ANHE *heap, int N)
1847{ 2518{
1848 int i; 2519 int i;
1849 2520
1850 for (i = HEAP0; i < N + HEAP0; ++i) 2521 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1855 2526
1856 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2527 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1857 } 2528 }
1858} 2529}
1859 2530
1860static void noinline 2531static void noinline ecb_cold
1861array_verify (EV_P_ W *ws, int cnt) 2532array_verify (EV_P_ W *ws, int cnt)
1862{ 2533{
1863 while (cnt--) 2534 while (cnt--)
1864 { 2535 {
1865 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2536 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1867 } 2538 }
1868} 2539}
1869#endif 2540#endif
1870 2541
1871#if EV_FEATURE_API 2542#if EV_FEATURE_API
1872void 2543void ecb_cold
1873ev_verify (EV_P) 2544ev_verify (EV_P)
1874{ 2545{
1875#if EV_VERIFY 2546#if EV_VERIFY
1876 int i; 2547 int i;
1877 WL w; 2548 WL w;
… …
1912#if EV_FORK_ENABLE 2583#if EV_FORK_ENABLE
1913 assert (forkmax >= forkcnt); 2584 assert (forkmax >= forkcnt);
1914 array_verify (EV_A_ (W *)forks, forkcnt); 2585 array_verify (EV_A_ (W *)forks, forkcnt);
1915#endif 2586#endif
1916 2587
2588#if EV_CLEANUP_ENABLE
2589 assert (cleanupmax >= cleanupcnt);
2590 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2591#endif
2592
1917#if EV_ASYNC_ENABLE 2593#if EV_ASYNC_ENABLE
1918 assert (asyncmax >= asynccnt); 2594 assert (asyncmax >= asynccnt);
1919 array_verify (EV_A_ (W *)asyncs, asynccnt); 2595 array_verify (EV_A_ (W *)asyncs, asynccnt);
1920#endif 2596#endif
1921 2597
… …
1938#endif 2614#endif
1939} 2615}
1940#endif 2616#endif
1941 2617
1942#if EV_MULTIPLICITY 2618#if EV_MULTIPLICITY
1943struct ev_loop * 2619struct ev_loop * ecb_cold
1944ev_default_loop_init (unsigned int flags)
1945#else 2620#else
1946int 2621int
2622#endif
1947ev_default_loop (unsigned int flags) 2623ev_default_loop (unsigned int flags)
1948#endif
1949{ 2624{
1950 if (!ev_default_loop_ptr) 2625 if (!ev_default_loop_ptr)
1951 { 2626 {
1952#if EV_MULTIPLICITY 2627#if EV_MULTIPLICITY
1953 EV_P = ev_default_loop_ptr = &default_loop_struct; 2628 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1972 2647
1973 return ev_default_loop_ptr; 2648 return ev_default_loop_ptr;
1974} 2649}
1975 2650
1976void 2651void
1977ev_default_destroy (void) 2652ev_loop_fork (EV_P)
1978{ 2653{
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 */ 2654 postfork = 1; /* must be in line with ev_default_fork */
2001} 2655}
2002 2656
2003/*****************************************************************************/ 2657/*****************************************************************************/
2004 2658
2005void 2659void
… …
2027 2681
2028 for (pri = NUMPRI; pri--; ) 2682 for (pri = NUMPRI; pri--; )
2029 while (pendingcnt [pri]) 2683 while (pendingcnt [pri])
2030 { 2684 {
2031 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2685 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 2686
2036 p->w->pending = 0; 2687 p->w->pending = 0;
2037 EV_CB_INVOKE (p->w, p->events); 2688 EV_CB_INVOKE (p->w, p->events);
2038 EV_FREQUENT_CHECK; 2689 EV_FREQUENT_CHECK;
2039 } 2690 }
… …
2096 EV_FREQUENT_CHECK; 2747 EV_FREQUENT_CHECK;
2097 feed_reverse (EV_A_ (W)w); 2748 feed_reverse (EV_A_ (W)w);
2098 } 2749 }
2099 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2750 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2100 2751
2101 feed_reverse_done (EV_A_ EV_TIMEOUT); 2752 feed_reverse_done (EV_A_ EV_TIMER);
2102 } 2753 }
2103} 2754}
2104 2755
2105#if EV_PERIODIC_ENABLE 2756#if EV_PERIODIC_ENABLE
2757
2758static void noinline
2759periodic_recalc (EV_P_ ev_periodic *w)
2760{
2761 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2762 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2763
2764 /* the above almost always errs on the low side */
2765 while (at <= ev_rt_now)
2766 {
2767 ev_tstamp nat = at + w->interval;
2768
2769 /* when resolution fails us, we use ev_rt_now */
2770 if (expect_false (nat == at))
2771 {
2772 at = ev_rt_now;
2773 break;
2774 }
2775
2776 at = nat;
2777 }
2778
2779 ev_at (w) = at;
2780}
2781
2106/* make periodics pending */ 2782/* make periodics pending */
2107inline_size void 2783inline_size void
2108periodics_reify (EV_P) 2784periodics_reify (EV_P)
2109{ 2785{
2110 EV_FREQUENT_CHECK; 2786 EV_FREQUENT_CHECK;
… …
2129 ANHE_at_cache (periodics [HEAP0]); 2805 ANHE_at_cache (periodics [HEAP0]);
2130 downheap (periodics, periodiccnt, HEAP0); 2806 downheap (periodics, periodiccnt, HEAP0);
2131 } 2807 }
2132 else if (w->interval) 2808 else if (w->interval)
2133 { 2809 {
2134 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2810 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]); 2811 ANHE_at_cache (periodics [HEAP0]);
2149 downheap (periodics, periodiccnt, HEAP0); 2812 downheap (periodics, periodiccnt, HEAP0);
2150 } 2813 }
2151 else 2814 else
2152 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2815 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2159 feed_reverse_done (EV_A_ EV_PERIODIC); 2822 feed_reverse_done (EV_A_ EV_PERIODIC);
2160 } 2823 }
2161} 2824}
2162 2825
2163/* simply recalculate all periodics */ 2826/* simply recalculate all periodics */
2164/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2827/* TODO: maybe ensure that at least one event happens when jumping forward? */
2165static void noinline 2828static void noinline ecb_cold
2166periodics_reschedule (EV_P) 2829periodics_reschedule (EV_P)
2167{ 2830{
2168 int i; 2831 int i;
2169 2832
2170 /* adjust periodics after time jump */ 2833 /* adjust periodics after time jump */
… …
2173 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2836 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2174 2837
2175 if (w->reschedule_cb) 2838 if (w->reschedule_cb)
2176 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2839 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2177 else if (w->interval) 2840 else if (w->interval)
2178 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2841 periodic_recalc (EV_A_ w);
2179 2842
2180 ANHE_at_cache (periodics [i]); 2843 ANHE_at_cache (periodics [i]);
2181 } 2844 }
2182 2845
2183 reheap (periodics, periodiccnt); 2846 reheap (periodics, periodiccnt);
2184} 2847}
2185#endif 2848#endif
2186 2849
2187/* adjust all timers by a given offset */ 2850/* adjust all timers by a given offset */
2188static void noinline 2851static void noinline ecb_cold
2189timers_reschedule (EV_P_ ev_tstamp adjust) 2852timers_reschedule (EV_P_ ev_tstamp adjust)
2190{ 2853{
2191 int i; 2854 int i;
2192 2855
2193 for (i = 0; i < timercnt; ++i) 2856 for (i = 0; i < timercnt; ++i)
… …
2230 * doesn't hurt either as we only do this on time-jumps or 2893 * doesn't hurt either as we only do this on time-jumps or
2231 * in the unlikely event of having been preempted here. 2894 * in the unlikely event of having been preempted here.
2232 */ 2895 */
2233 for (i = 4; --i; ) 2896 for (i = 4; --i; )
2234 { 2897 {
2898 ev_tstamp diff;
2235 rtmn_diff = ev_rt_now - mn_now; 2899 rtmn_diff = ev_rt_now - mn_now;
2236 2900
2901 diff = odiff - rtmn_diff;
2902
2237 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2903 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2238 return; /* all is well */ 2904 return; /* all is well */
2239 2905
2240 ev_rt_now = ev_time (); 2906 ev_rt_now = ev_time ();
2241 mn_now = get_clock (); 2907 mn_now = get_clock ();
2242 now_floor = mn_now; 2908 now_floor = mn_now;
… …
2265 mn_now = ev_rt_now; 2931 mn_now = ev_rt_now;
2266 } 2932 }
2267} 2933}
2268 2934
2269void 2935void
2270ev_loop (EV_P_ int flags) 2936ev_run (EV_P_ int flags)
2271{ 2937{
2272#if EV_FEATURE_API 2938#if EV_FEATURE_API
2273 ++loop_depth; 2939 ++loop_depth;
2274#endif 2940#endif
2275 2941
2276 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2942 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2277 2943
2278 loop_done = EVUNLOOP_CANCEL; 2944 loop_done = EVBREAK_CANCEL;
2279 2945
2280 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2946 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2281 2947
2282 do 2948 do
2283 { 2949 {
… …
2326 /* calculate blocking time */ 2992 /* calculate blocking time */
2327 { 2993 {
2328 ev_tstamp waittime = 0.; 2994 ev_tstamp waittime = 0.;
2329 ev_tstamp sleeptime = 0.; 2995 ev_tstamp sleeptime = 0.;
2330 2996
2997 /* remember old timestamp for io_blocktime calculation */
2998 ev_tstamp prev_mn_now = mn_now;
2999
3000 /* update time to cancel out callback processing overhead */
3001 time_update (EV_A_ 1e100);
3002
3003 /* from now on, we want a pipe-wake-up */
3004 pipe_write_wanted = 1;
3005
3006 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3007
2331 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3008 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2332 { 3009 {
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; 3010 waittime = MAX_BLOCKTIME;
2340 3011
2341 if (timercnt) 3012 if (timercnt)
2342 { 3013 {
2343 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3014 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2344 if (waittime > to) waittime = to; 3015 if (waittime > to) waittime = to;
2345 } 3016 }
2346 3017
2347#if EV_PERIODIC_ENABLE 3018#if EV_PERIODIC_ENABLE
2348 if (periodiccnt) 3019 if (periodiccnt)
2349 { 3020 {
2350 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3021 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2351 if (waittime > to) waittime = to; 3022 if (waittime > to) waittime = to;
2352 } 3023 }
2353#endif 3024#endif
2354 3025
2355 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3026 /* don't let timeouts decrease the waittime below timeout_blocktime */
2356 if (expect_false (waittime < timeout_blocktime)) 3027 if (expect_false (waittime < timeout_blocktime))
2357 waittime = timeout_blocktime; 3028 waittime = timeout_blocktime;
3029
3030 /* at this point, we NEED to wait, so we have to ensure */
3031 /* to pass a minimum nonzero value to the backend */
3032 if (expect_false (waittime < backend_mintime))
3033 waittime = backend_mintime;
2358 3034
2359 /* extra check because io_blocktime is commonly 0 */ 3035 /* extra check because io_blocktime is commonly 0 */
2360 if (expect_false (io_blocktime)) 3036 if (expect_false (io_blocktime))
2361 { 3037 {
2362 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3038 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2363 3039
2364 if (sleeptime > waittime - backend_fudge) 3040 if (sleeptime > waittime - backend_mintime)
2365 sleeptime = waittime - backend_fudge; 3041 sleeptime = waittime - backend_mintime;
2366 3042
2367 if (expect_true (sleeptime > 0.)) 3043 if (expect_true (sleeptime > 0.))
2368 { 3044 {
2369 ev_sleep (sleeptime); 3045 ev_sleep (sleeptime);
2370 waittime -= sleeptime; 3046 waittime -= sleeptime;
… …
2373 } 3049 }
2374 3050
2375#if EV_FEATURE_API 3051#if EV_FEATURE_API
2376 ++loop_count; 3052 ++loop_count;
2377#endif 3053#endif
2378 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 3054 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2379 backend_poll (EV_A_ waittime); 3055 backend_poll (EV_A_ waittime);
2380 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 3056 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3057
3058 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3059
3060 if (pipe_write_skipped)
3061 {
3062 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3063 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3064 }
3065
2381 3066
2382 /* update ev_rt_now, do magic */ 3067 /* update ev_rt_now, do magic */
2383 time_update (EV_A_ waittime + sleeptime); 3068 time_update (EV_A_ waittime + sleeptime);
2384 } 3069 }
2385 3070
… …
2403 EV_INVOKE_PENDING; 3088 EV_INVOKE_PENDING;
2404 } 3089 }
2405 while (expect_true ( 3090 while (expect_true (
2406 activecnt 3091 activecnt
2407 && !loop_done 3092 && !loop_done
2408 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3093 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2409 )); 3094 ));
2410 3095
2411 if (loop_done == EVUNLOOP_ONE) 3096 if (loop_done == EVBREAK_ONE)
2412 loop_done = EVUNLOOP_CANCEL; 3097 loop_done = EVBREAK_CANCEL;
2413 3098
2414#if EV_FEATURE_API 3099#if EV_FEATURE_API
2415 --loop_depth; 3100 --loop_depth;
2416#endif 3101#endif
2417} 3102}
2418 3103
2419void 3104void
2420ev_unloop (EV_P_ int how) 3105ev_break (EV_P_ int how)
2421{ 3106{
2422 loop_done = how; 3107 loop_done = how;
2423} 3108}
2424 3109
2425void 3110void
… …
2573 EV_FREQUENT_CHECK; 3258 EV_FREQUENT_CHECK;
2574 3259
2575 wlist_del (&anfds[w->fd].head, (WL)w); 3260 wlist_del (&anfds[w->fd].head, (WL)w);
2576 ev_stop (EV_A_ (W)w); 3261 ev_stop (EV_A_ (W)w);
2577 3262
2578 fd_change (EV_A_ w->fd, 1); 3263 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2579 3264
2580 EV_FREQUENT_CHECK; 3265 EV_FREQUENT_CHECK;
2581} 3266}
2582 3267
2583void noinline 3268void noinline
… …
2636 3321
2637void noinline 3322void noinline
2638ev_timer_again (EV_P_ ev_timer *w) 3323ev_timer_again (EV_P_ ev_timer *w)
2639{ 3324{
2640 EV_FREQUENT_CHECK; 3325 EV_FREQUENT_CHECK;
3326
3327 clear_pending (EV_A_ (W)w);
2641 3328
2642 if (ev_is_active (w)) 3329 if (ev_is_active (w))
2643 { 3330 {
2644 if (w->repeat) 3331 if (w->repeat)
2645 { 3332 {
… …
2675 if (w->reschedule_cb) 3362 if (w->reschedule_cb)
2676 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3363 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2677 else if (w->interval) 3364 else if (w->interval)
2678 { 3365 {
2679 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3366 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 */ 3367 periodic_recalc (EV_A_ w);
2681 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2682 } 3368 }
2683 else 3369 else
2684 ev_at (w) = w->offset; 3370 ev_at (w) = w->offset;
2685 3371
2686 EV_FREQUENT_CHECK; 3372 EV_FREQUENT_CHECK;
… …
2807 sa.sa_handler = ev_sighandler; 3493 sa.sa_handler = ev_sighandler;
2808 sigfillset (&sa.sa_mask); 3494 sigfillset (&sa.sa_mask);
2809 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3495 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2810 sigaction (w->signum, &sa, 0); 3496 sigaction (w->signum, &sa, 0);
2811 3497
3498 if (origflags & EVFLAG_NOSIGMASK)
3499 {
2812 sigemptyset (&sa.sa_mask); 3500 sigemptyset (&sa.sa_mask);
2813 sigaddset (&sa.sa_mask, w->signum); 3501 sigaddset (&sa.sa_mask, w->signum);
2814 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3502 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3503 }
2815#endif 3504#endif
2816 } 3505 }
2817 3506
2818 EV_FREQUENT_CHECK; 3507 EV_FREQUENT_CHECK;
2819} 3508}
… …
2960 if (!pend || pend == path) 3649 if (!pend || pend == path)
2961 break; 3650 break;
2962 3651
2963 *pend = 0; 3652 *pend = 0;
2964 w->wd = inotify_add_watch (fs_fd, path, mask); 3653 w->wd = inotify_add_watch (fs_fd, path, mask);
2965 } 3654 }
2966 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3655 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2967 } 3656 }
2968 } 3657 }
2969 3658
2970 if (w->wd >= 0) 3659 if (w->wd >= 0)
… …
3037 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3726 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3038 ofs += sizeof (struct inotify_event) + ev->len; 3727 ofs += sizeof (struct inotify_event) + ev->len;
3039 } 3728 }
3040} 3729}
3041 3730
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 3731inline_size void ecb_cold
3075ev_check_2625 (EV_P) 3732ev_check_2625 (EV_P)
3076{ 3733{
3077 /* kernels < 2.6.25 are borked 3734 /* kernels < 2.6.25 are borked
3078 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3735 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3079 */ 3736 */
… …
3084} 3741}
3085 3742
3086inline_size int 3743inline_size int
3087infy_newfd (void) 3744infy_newfd (void)
3088{ 3745{
3089#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 3746#if defined IN_CLOEXEC && defined IN_NONBLOCK
3090 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 3747 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3091 if (fd >= 0) 3748 if (fd >= 0)
3092 return fd; 3749 return fd;
3093#endif 3750#endif
3094 return inotify_init (); 3751 return inotify_init ();
… …
3400 4057
3401#if EV_EMBED_ENABLE 4058#if EV_EMBED_ENABLE
3402void noinline 4059void noinline
3403ev_embed_sweep (EV_P_ ev_embed *w) 4060ev_embed_sweep (EV_P_ ev_embed *w)
3404{ 4061{
3405 ev_loop (w->other, EVLOOP_NONBLOCK); 4062 ev_run (w->other, EVRUN_NOWAIT);
3406} 4063}
3407 4064
3408static void 4065static void
3409embed_io_cb (EV_P_ ev_io *io, int revents) 4066embed_io_cb (EV_P_ ev_io *io, int revents)
3410{ 4067{
3411 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4068 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3412 4069
3413 if (ev_cb (w)) 4070 if (ev_cb (w))
3414 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4071 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3415 else 4072 else
3416 ev_loop (w->other, EVLOOP_NONBLOCK); 4073 ev_run (w->other, EVRUN_NOWAIT);
3417} 4074}
3418 4075
3419static void 4076static void
3420embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4077embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3421{ 4078{
… …
3425 EV_P = w->other; 4082 EV_P = w->other;
3426 4083
3427 while (fdchangecnt) 4084 while (fdchangecnt)
3428 { 4085 {
3429 fd_reify (EV_A); 4086 fd_reify (EV_A);
3430 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4087 ev_run (EV_A_ EVRUN_NOWAIT);
3431 } 4088 }
3432 } 4089 }
3433} 4090}
3434 4091
3435static void 4092static void
… …
3441 4098
3442 { 4099 {
3443 EV_P = w->other; 4100 EV_P = w->other;
3444 4101
3445 ev_loop_fork (EV_A); 4102 ev_loop_fork (EV_A);
3446 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4103 ev_run (EV_A_ EVRUN_NOWAIT);
3447 } 4104 }
3448 4105
3449 ev_embed_start (EV_A_ w); 4106 ev_embed_start (EV_A_ w);
3450} 4107}
3451 4108
… …
3543 4200
3544 EV_FREQUENT_CHECK; 4201 EV_FREQUENT_CHECK;
3545} 4202}
3546#endif 4203#endif
3547 4204
4205#if EV_CLEANUP_ENABLE
4206void
4207ev_cleanup_start (EV_P_ ev_cleanup *w)
4208{
4209 if (expect_false (ev_is_active (w)))
4210 return;
4211
4212 EV_FREQUENT_CHECK;
4213
4214 ev_start (EV_A_ (W)w, ++cleanupcnt);
4215 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4216 cleanups [cleanupcnt - 1] = w;
4217
4218 /* cleanup watchers should never keep a refcount on the loop */
4219 ev_unref (EV_A);
4220 EV_FREQUENT_CHECK;
4221}
4222
4223void
4224ev_cleanup_stop (EV_P_ ev_cleanup *w)
4225{
4226 clear_pending (EV_A_ (W)w);
4227 if (expect_false (!ev_is_active (w)))
4228 return;
4229
4230 EV_FREQUENT_CHECK;
4231 ev_ref (EV_A);
4232
4233 {
4234 int active = ev_active (w);
4235
4236 cleanups [active - 1] = cleanups [--cleanupcnt];
4237 ev_active (cleanups [active - 1]) = active;
4238 }
4239
4240 ev_stop (EV_A_ (W)w);
4241
4242 EV_FREQUENT_CHECK;
4243}
4244#endif
4245
3548#if EV_ASYNC_ENABLE 4246#if EV_ASYNC_ENABLE
3549void 4247void
3550ev_async_start (EV_P_ ev_async *w) 4248ev_async_start (EV_P_ ev_async *w)
3551{ 4249{
3552 if (expect_false (ev_is_active (w))) 4250 if (expect_false (ev_is_active (w)))
3553 return; 4251 return;
4252
4253 w->sent = 0;
3554 4254
3555 evpipe_init (EV_A); 4255 evpipe_init (EV_A);
3556 4256
3557 EV_FREQUENT_CHECK; 4257 EV_FREQUENT_CHECK;
3558 4258
… …
3636{ 4336{
3637 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4337 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3638 4338
3639 if (expect_false (!once)) 4339 if (expect_false (!once))
3640 { 4340 {
3641 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4341 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3642 return; 4342 return;
3643 } 4343 }
3644 4344
3645 once->cb = cb; 4345 once->cb = cb;
3646 once->arg = arg; 4346 once->arg = arg;
… …
3661} 4361}
3662 4362
3663/*****************************************************************************/ 4363/*****************************************************************************/
3664 4364
3665#if EV_WALK_ENABLE 4365#if EV_WALK_ENABLE
3666void 4366void ecb_cold
3667ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4367ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3668{ 4368{
3669 int i, j; 4369 int i, j;
3670 ev_watcher_list *wl, *wn; 4370 ev_watcher_list *wl, *wn;
3671 4371
… …
3715 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4415 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3716#endif 4416#endif
3717 4417
3718#if EV_IDLE_ENABLE 4418#if EV_IDLE_ENABLE
3719 if (types & EV_IDLE) 4419 if (types & EV_IDLE)
3720 for (j = NUMPRI; i--; ) 4420 for (j = NUMPRI; j--; )
3721 for (i = idlecnt [j]; i--; ) 4421 for (i = idlecnt [j]; i--; )
3722 cb (EV_A_ EV_IDLE, idles [j][i]); 4422 cb (EV_A_ EV_IDLE, idles [j][i]);
3723#endif 4423#endif
3724 4424
3725#if EV_FORK_ENABLE 4425#if EV_FORK_ENABLE
… …
3778 4478
3779#if EV_MULTIPLICITY 4479#if EV_MULTIPLICITY
3780 #include "ev_wrap.h" 4480 #include "ev_wrap.h"
3781#endif 4481#endif
3782 4482
3783#ifdef __cplusplus
3784}
3785#endif
3786

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