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Comparing libev/ev.c (file contents):
Revision 1.98 by root, Sun Nov 11 02:05:20 2007 UTC vs.
Revision 1.383 by root, Wed Jul 20 00:40:14 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 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 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
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
37 * either the BSD or the GPL.
30 */ 38 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
37# include "config.h" 45# include "config.h"
46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
38 67
39# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
42# endif 71# endif
43# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
45# endif 81# endif
46# endif 82# endif
47 83
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 84# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
50# endif 91# endif
51 92
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
53# define EV_USE_POLL 1 99# define EV_USE_SELECT 0
54# endif 100# endif
55 101
56# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
57# define EV_USE_EPOLL 1 108# define EV_USE_POLL 0
58# endif 109# endif
59 110
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
62# endif 118# endif
63 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
64#endif 127# endif
128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
136# endif
65 137
66#include <math.h> 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
67#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
68#include <fcntl.h> 169#include <fcntl.h>
69#include <stddef.h> 170#include <stddef.h>
70 171
71#include <stdio.h> 172#include <stdio.h>
72 173
73#include <assert.h> 174#include <assert.h>
74#include <errno.h> 175#include <errno.h>
75#include <sys/types.h> 176#include <sys/types.h>
76#include <time.h> 177#include <time.h>
178#include <limits.h>
77 179
78#include <signal.h> 180#include <signal.h>
79
80#ifndef WIN32
81# include <unistd.h>
82# include <sys/time.h>
83# include <sys/wait.h>
84#endif
85/**/
86
87#ifndef EV_USE_MONOTONIC
88# define EV_USE_MONOTONIC 1
89#endif
90
91#ifndef EV_USE_SELECT
92# define EV_USE_SELECT 1
93#endif
94
95#ifndef EV_USE_POLL
96# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
97#endif
98
99#ifndef EV_USE_EPOLL
100# define EV_USE_EPOLL 0
101#endif
102
103#ifndef EV_USE_KQUEUE
104# define EV_USE_KQUEUE 0
105#endif
106
107#ifndef EV_USE_WIN32
108# ifdef WIN32
109# define EV_USE_WIN32 0 /* it does not exist, use select */
110# undef EV_USE_SELECT
111# define EV_USE_SELECT 1
112# else
113# define EV_USE_WIN32 0
114# endif
115#endif
116
117#ifndef EV_USE_REALTIME
118# define EV_USE_REALTIME 1
119#endif
120
121/**/
122
123#ifndef CLOCK_MONOTONIC
124# undef EV_USE_MONOTONIC
125# define EV_USE_MONOTONIC 0
126#endif
127
128#ifndef CLOCK_REALTIME
129# undef EV_USE_REALTIME
130# define EV_USE_REALTIME 0
131#endif
132
133/**/
134
135#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
136#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
137#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
138/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
139 181
140#ifdef EV_H 182#ifdef EV_H
141# include EV_H 183# include EV_H
142#else 184#else
143# include "ev.h" 185# include "ev.h"
144#endif 186#endif
145 187
146#if __GNUC__ >= 3 188EV_CPP(extern "C" {)
147# define expect(expr,value) __builtin_expect ((expr),(value)) 189
148# define inline inline 190#ifndef _WIN32
191# include <sys/time.h>
192# include <sys/wait.h>
193# include <unistd.h>
149#else 194#else
150# define expect(expr,value) (expr) 195# include <io.h>
151# define inline static 196# define WIN32_LEAN_AND_MEAN
197# include <windows.h>
198# ifndef EV_SELECT_IS_WINSOCKET
199# define EV_SELECT_IS_WINSOCKET 1
152#endif 200# endif
201# undef EV_AVOID_STDIO
202#endif
153 203
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
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */
213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
251# endif
252#endif
253
254#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
258# define EV_USE_MONOTONIC 0
259# endif
260#endif
261
262#ifndef EV_USE_REALTIME
263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
264#endif
265
266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
270# define EV_USE_NANOSLEEP 0
271# endif
272#endif
273
274#ifndef EV_USE_SELECT
275# define EV_USE_SELECT EV_FEATURE_BACKENDS
276#endif
277
278#ifndef EV_USE_POLL
279# ifdef _WIN32
280# define EV_USE_POLL 0
281# else
282# define EV_USE_POLL EV_FEATURE_BACKENDS
283# endif
284#endif
285
286#ifndef EV_USE_EPOLL
287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
289# else
290# define EV_USE_EPOLL 0
291# endif
292#endif
293
294#ifndef EV_USE_KQUEUE
295# define EV_USE_KQUEUE 0
296#endif
297
298#ifndef EV_USE_PORT
299# define EV_USE_PORT 0
300#endif
301
302#ifndef EV_USE_INOTIFY
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_INOTIFY EV_FEATURE_OS
305# else
306# define EV_USE_INOTIFY 0
307# endif
308#endif
309
310#ifndef EV_PID_HASHSIZE
311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
312#endif
313
314#ifndef EV_INOTIFY_HASHSIZE
315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
316#endif
317
318#ifndef EV_USE_EVENTFD
319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
320# define EV_USE_EVENTFD EV_FEATURE_OS
321# else
322# define EV_USE_EVENTFD 0
323# endif
324#endif
325
326#ifndef EV_USE_SIGNALFD
327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
328# define EV_USE_SIGNALFD EV_FEATURE_OS
329# else
330# define EV_USE_SIGNALFD 0
331# endif
332#endif
333
334#if 0 /* debugging */
335# define EV_VERIFY 3
336# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1
338#endif
339
340#ifndef EV_VERIFY
341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342#endif
343
344#ifndef EV_USE_4HEAP
345# define EV_USE_4HEAP EV_FEATURE_DATA
346#endif
347
348#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
364#endif
365
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
373
374#ifndef CLOCK_MONOTONIC
375# undef EV_USE_MONOTONIC
376# define EV_USE_MONOTONIC 0
377#endif
378
379#ifndef CLOCK_REALTIME
380# undef EV_USE_REALTIME
381# define EV_USE_REALTIME 0
382#endif
383
384#if !EV_STAT_ENABLE
385# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0
387#endif
388
389#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
392# include <sys/select.h>
393# endif
394#endif
395
396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
398# include <sys/inotify.h>
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0
403# endif
404#endif
405
406#if EV_SELECT_IS_WINSOCKET
407# include <winsock.h>
408#endif
409
410#if EV_USE_EVENTFD
411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
412# include <stdint.h>
413# ifndef EFD_NONBLOCK
414# define EFD_NONBLOCK O_NONBLOCK
415# endif
416# ifndef EFD_CLOEXEC
417# ifdef O_CLOEXEC
418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
425
426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445};
446#endif
447
448/**/
449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
456/*
457 * This is used to work around floating point rounding problems.
458 * This value is good at least till the year 4000.
459 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
462
463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
465
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
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
493#else
494 #define ecb_inline static
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
508 #endif
509#endif
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
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) && defined(MemoryBarrier)
521 #define ECB_MEMORY_FENCE MemoryBarrier ()
522 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
523 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
524 #endif
525#endif
526
527#ifndef ECB_MEMORY_FENCE
528 #include <pthread.h>
529
530 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
531 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
532 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
533 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
534#endif
535
536#if ECB_GCC_VERSION(3,1)
537 #define ecb_attribute(attrlist) __attribute__(attrlist)
538 #define ecb_is_constant(expr) __builtin_constant_p (expr)
539 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
540 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
541#else
542 #define ecb_attribute(attrlist)
543 #define ecb_is_constant(expr) 0
544 #define ecb_expect(expr,value) (expr)
545 #define ecb_prefetch(addr,rw,locality)
546#endif
547
548#define ecb_noinline ecb_attribute ((__noinline__))
549#define ecb_noreturn ecb_attribute ((__noreturn__))
550#define ecb_unused ecb_attribute ((__unused__))
551#define ecb_const ecb_attribute ((__const__))
552#define ecb_pure ecb_attribute ((__pure__))
553
554#if ECB_GCC_VERSION(4,3)
555 #define ecb_artificial ecb_attribute ((__artificial__))
556 #define ecb_hot ecb_attribute ((__hot__))
557 #define ecb_cold ecb_attribute ((__cold__))
558#else
559 #define ecb_artificial
560 #define ecb_hot
561 #define ecb_cold
562#endif
563
564/* put around conditional expressions if you are very sure that the */
565/* expression is mostly true or mostly false. note that these return */
566/* booleans, not the expression. */
154#define expect_false(expr) expect ((expr) != 0, 0) 567#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 568#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
569/* ecb.h end */
156 570
571#define expect_false(cond) ecb_expect_false (cond)
572#define expect_true(cond) ecb_expect_true (cond)
573#define noinline ecb_noinline
574
575#define inline_size ecb_inline
576
577#if EV_FEATURE_CODE
578# define inline_speed ecb_inline
579#else
580# define inline_speed static noinline
581#endif
582
157#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 583#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
584
585#if EV_MINPRI == EV_MAXPRI
586# define ABSPRI(w) (((W)w), 0)
587#else
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 588# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
589#endif
159 590
591#define EMPTY /* required for microsofts broken pseudo-c compiler */
592#define EMPTY2(a,b) /* used to suppress some warnings */
593
160typedef struct ev_watcher *W; 594typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 595typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 596typedef ev_watcher_time *WT;
163 597
598#define ev_active(w) ((W)(w))->active
599#define ev_at(w) ((WT)(w))->at
600
601#if EV_USE_REALTIME
602/* sig_atomic_t is used to avoid per-thread variables or locking but still */
603/* giving it a reasonably high chance of working on typical architectures */
604static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
605#endif
606
607#if EV_USE_MONOTONIC
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 608static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
609#endif
165 610
611#ifndef EV_FD_TO_WIN32_HANDLE
612# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
613#endif
614#ifndef EV_WIN32_HANDLE_TO_FD
615# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
616#endif
617#ifndef EV_WIN32_CLOSE_FD
618# define EV_WIN32_CLOSE_FD(fd) close (fd)
619#endif
620
166#ifdef WIN32 621#ifdef _WIN32
167# include "ev_win32.c" 622# include "ev_win32.c"
168#endif 623#endif
169 624
170/*****************************************************************************/ 625/*****************************************************************************/
171 626
627/* define a suitable floor function (only used by periodics atm) */
628
629#if EV_USE_FLOOR
630# include <math.h>
631# define ev_floor(v) floor (v)
632#else
633
634#include <float.h>
635
636/* a floor() replacement function, should be independent of ev_tstamp type */
637static ev_tstamp noinline
638ev_floor (ev_tstamp v)
639{
640 /* the choice of shift factor is not terribly important */
641#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
642 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
643#else
644 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
645#endif
646
647 /* argument too large for an unsigned long? */
648 if (expect_false (v >= shift))
649 {
650 ev_tstamp f;
651
652 if (v == v - 1.)
653 return v; /* very large number */
654
655 f = shift * ev_floor (v * (1. / shift));
656 return f + ev_floor (v - f);
657 }
658
659 /* special treatment for negative args? */
660 if (expect_false (v < 0.))
661 {
662 ev_tstamp f = -ev_floor (-v);
663
664 return f - (f == v ? 0 : 1);
665 }
666
667 /* fits into an unsigned long */
668 return (unsigned long)v;
669}
670
671#endif
672
673/*****************************************************************************/
674
675#ifdef __linux
676# include <sys/utsname.h>
677#endif
678
679static unsigned int noinline ecb_cold
680ev_linux_version (void)
681{
682#ifdef __linux
683 unsigned int v = 0;
684 struct utsname buf;
685 int i;
686 char *p = buf.release;
687
688 if (uname (&buf))
689 return 0;
690
691 for (i = 3+1; --i; )
692 {
693 unsigned int c = 0;
694
695 for (;;)
696 {
697 if (*p >= '0' && *p <= '9')
698 c = c * 10 + *p++ - '0';
699 else
700 {
701 p += *p == '.';
702 break;
703 }
704 }
705
706 v = (v << 8) | c;
707 }
708
709 return v;
710#else
711 return 0;
712#endif
713}
714
715/*****************************************************************************/
716
717#if EV_AVOID_STDIO
718static void noinline ecb_cold
719ev_printerr (const char *msg)
720{
721 write (STDERR_FILENO, msg, strlen (msg));
722}
723#endif
724
172static void (*syserr_cb)(const char *msg); 725static void (*syserr_cb)(const char *msg);
173 726
727void ecb_cold
174void ev_set_syserr_cb (void (*cb)(const char *msg)) 728ev_set_syserr_cb (void (*cb)(const char *msg))
175{ 729{
176 syserr_cb = cb; 730 syserr_cb = cb;
177} 731}
178 732
179static void 733static void noinline ecb_cold
180syserr (const char *msg) 734ev_syserr (const char *msg)
181{ 735{
182 if (!msg) 736 if (!msg)
183 msg = "(libev) system error"; 737 msg = "(libev) system error";
184 738
185 if (syserr_cb) 739 if (syserr_cb)
186 syserr_cb (msg); 740 syserr_cb (msg);
187 else 741 else
188 { 742 {
743#if EV_AVOID_STDIO
744 ev_printerr (msg);
745 ev_printerr (": ");
746 ev_printerr (strerror (errno));
747 ev_printerr ("\n");
748#else
189 perror (msg); 749 perror (msg);
750#endif
190 abort (); 751 abort ();
191 } 752 }
192} 753}
193 754
755static void *
756ev_realloc_emul (void *ptr, long size)
757{
758#if __GLIBC__
759 return realloc (ptr, size);
760#else
761 /* some systems, notably openbsd and darwin, fail to properly
762 * implement realloc (x, 0) (as required by both ansi c-89 and
763 * the single unix specification, so work around them here.
764 */
765
766 if (size)
767 return realloc (ptr, size);
768
769 free (ptr);
770 return 0;
771#endif
772}
773
194static void *(*alloc)(void *ptr, long size); 774static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
195 775
776void ecb_cold
196void ev_set_allocator (void *(*cb)(void *ptr, long size)) 777ev_set_allocator (void *(*cb)(void *ptr, long size))
197{ 778{
198 alloc = cb; 779 alloc = cb;
199} 780}
200 781
201static void * 782inline_speed void *
202ev_realloc (void *ptr, long size) 783ev_realloc (void *ptr, long size)
203{ 784{
204 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 785 ptr = alloc (ptr, size);
205 786
206 if (!ptr && size) 787 if (!ptr && size)
207 { 788 {
789#if EV_AVOID_STDIO
790 ev_printerr ("(libev) memory allocation failed, aborting.\n");
791#else
208 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 792 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
793#endif
209 abort (); 794 abort ();
210 } 795 }
211 796
212 return ptr; 797 return ptr;
213} 798}
… …
215#define ev_malloc(size) ev_realloc (0, (size)) 800#define ev_malloc(size) ev_realloc (0, (size))
216#define ev_free(ptr) ev_realloc ((ptr), 0) 801#define ev_free(ptr) ev_realloc ((ptr), 0)
217 802
218/*****************************************************************************/ 803/*****************************************************************************/
219 804
805/* set in reify when reification needed */
806#define EV_ANFD_REIFY 1
807
808/* file descriptor info structure */
220typedef struct 809typedef struct
221{ 810{
222 WL head; 811 WL head;
223 unsigned char events; 812 unsigned char events; /* the events watched for */
813 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
814 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
224 unsigned char reify; 815 unsigned char unused;
816#if EV_USE_EPOLL
817 unsigned int egen; /* generation counter to counter epoll bugs */
818#endif
819#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
820 SOCKET handle;
821#endif
822#if EV_USE_IOCP
823 OVERLAPPED or, ow;
824#endif
225} ANFD; 825} ANFD;
226 826
827/* stores the pending event set for a given watcher */
227typedef struct 828typedef struct
228{ 829{
229 W w; 830 W w;
230 int events; 831 int events; /* the pending event set for the given watcher */
231} ANPENDING; 832} ANPENDING;
833
834#if EV_USE_INOTIFY
835/* hash table entry per inotify-id */
836typedef struct
837{
838 WL head;
839} ANFS;
840#endif
841
842/* Heap Entry */
843#if EV_HEAP_CACHE_AT
844 /* a heap element */
845 typedef struct {
846 ev_tstamp at;
847 WT w;
848 } ANHE;
849
850 #define ANHE_w(he) (he).w /* access watcher, read-write */
851 #define ANHE_at(he) (he).at /* access cached at, read-only */
852 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
853#else
854 /* a heap element */
855 typedef WT ANHE;
856
857 #define ANHE_w(he) (he)
858 #define ANHE_at(he) (he)->at
859 #define ANHE_at_cache(he)
860#endif
232 861
233#if EV_MULTIPLICITY 862#if EV_MULTIPLICITY
234 863
235 struct ev_loop 864 struct ev_loop
236 { 865 {
237 ev_tstamp ev_rt_now; 866 ev_tstamp ev_rt_now;
867 #define ev_rt_now ((loop)->ev_rt_now)
238 #define VAR(name,decl) decl; 868 #define VAR(name,decl) decl;
239 #include "ev_vars.h" 869 #include "ev_vars.h"
240 #undef VAR 870 #undef VAR
241 }; 871 };
242 #include "ev_wrap.h" 872 #include "ev_wrap.h"
243 873
244 struct ev_loop default_loop_struct; 874 static struct ev_loop default_loop_struct;
245 static struct ev_loop *default_loop; 875 struct ev_loop *ev_default_loop_ptr;
246 876
247#else 877#else
248 878
249 ev_tstamp ev_rt_now; 879 ev_tstamp ev_rt_now;
250 #define VAR(name,decl) static decl; 880 #define VAR(name,decl) static decl;
251 #include "ev_vars.h" 881 #include "ev_vars.h"
252 #undef VAR 882 #undef VAR
253 883
254 static int default_loop; 884 static int ev_default_loop_ptr;
255 885
256#endif 886#endif
887
888#if EV_FEATURE_API
889# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
890# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
891# define EV_INVOKE_PENDING invoke_cb (EV_A)
892#else
893# define EV_RELEASE_CB (void)0
894# define EV_ACQUIRE_CB (void)0
895# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
896#endif
897
898#define EVBREAK_RECURSE 0x80
257 899
258/*****************************************************************************/ 900/*****************************************************************************/
259 901
902#ifndef EV_HAVE_EV_TIME
260ev_tstamp 903ev_tstamp
261ev_time (void) 904ev_time (void)
262{ 905{
263#if EV_USE_REALTIME 906#if EV_USE_REALTIME
907 if (expect_true (have_realtime))
908 {
264 struct timespec ts; 909 struct timespec ts;
265 clock_gettime (CLOCK_REALTIME, &ts); 910 clock_gettime (CLOCK_REALTIME, &ts);
266 return ts.tv_sec + ts.tv_nsec * 1e-9; 911 return ts.tv_sec + ts.tv_nsec * 1e-9;
267#else 912 }
913#endif
914
268 struct timeval tv; 915 struct timeval tv;
269 gettimeofday (&tv, 0); 916 gettimeofday (&tv, 0);
270 return tv.tv_sec + tv.tv_usec * 1e-6; 917 return tv.tv_sec + tv.tv_usec * 1e-6;
271#endif
272} 918}
919#endif
273 920
274inline ev_tstamp 921inline_size ev_tstamp
275get_clock (void) 922get_clock (void)
276{ 923{
277#if EV_USE_MONOTONIC 924#if EV_USE_MONOTONIC
278 if (expect_true (have_monotonic)) 925 if (expect_true (have_monotonic))
279 { 926 {
… …
292{ 939{
293 return ev_rt_now; 940 return ev_rt_now;
294} 941}
295#endif 942#endif
296 943
297#define array_roundsize(type,n) ((n) | 4 & ~3) 944void
945ev_sleep (ev_tstamp delay)
946{
947 if (delay > 0.)
948 {
949#if EV_USE_NANOSLEEP
950 struct timespec ts;
951
952 EV_TS_SET (ts, delay);
953 nanosleep (&ts, 0);
954#elif defined(_WIN32)
955 Sleep ((unsigned long)(delay * 1e3));
956#else
957 struct timeval tv;
958
959 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
960 /* something not guaranteed by newer posix versions, but guaranteed */
961 /* by older ones */
962 EV_TV_SET (tv, delay);
963 select (0, 0, 0, 0, &tv);
964#endif
965 }
966}
967
968/*****************************************************************************/
969
970#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
971
972/* find a suitable new size for the given array, */
973/* hopefully by rounding to a nice-to-malloc size */
974inline_size int
975array_nextsize (int elem, int cur, int cnt)
976{
977 int ncur = cur + 1;
978
979 do
980 ncur <<= 1;
981 while (cnt > ncur);
982
983 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
984 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
985 {
986 ncur *= elem;
987 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
988 ncur = ncur - sizeof (void *) * 4;
989 ncur /= elem;
990 }
991
992 return ncur;
993}
994
995static void * noinline ecb_cold
996array_realloc (int elem, void *base, int *cur, int cnt)
997{
998 *cur = array_nextsize (elem, *cur, cnt);
999 return ev_realloc (base, elem * *cur);
1000}
1001
1002#define array_init_zero(base,count) \
1003 memset ((void *)(base), 0, sizeof (*(base)) * (count))
298 1004
299#define array_needsize(type,base,cur,cnt,init) \ 1005#define array_needsize(type,base,cur,cnt,init) \
300 if (expect_false ((cnt) > cur)) \ 1006 if (expect_false ((cnt) > (cur))) \
301 { \ 1007 { \
302 int newcnt = cur; \ 1008 int ecb_unused ocur_ = (cur); \
303 do \ 1009 (base) = (type *)array_realloc \
304 { \ 1010 (sizeof (type), (base), &(cur), (cnt)); \
305 newcnt = array_roundsize (type, newcnt << 1); \ 1011 init ((base) + (ocur_), (cur) - ocur_); \
306 } \
307 while ((cnt) > newcnt); \
308 \
309 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
310 init (base + cur, newcnt - cur); \
311 cur = newcnt; \
312 } 1012 }
313 1013
1014#if 0
314#define array_slim(type,stem) \ 1015#define array_slim(type,stem) \
315 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1016 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
316 { \ 1017 { \
317 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1018 stem ## max = array_roundsize (stem ## cnt >> 1); \
318 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1019 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
319 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1020 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
320 } 1021 }
321 1022#endif
322/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
323/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
324#define array_free_microshit(stem) \
325 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
326 1023
327#define array_free(stem, idx) \ 1024#define array_free(stem, idx) \
328 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1025 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
329 1026
330/*****************************************************************************/ 1027/*****************************************************************************/
331 1028
332static void 1029/* dummy callback for pending events */
333anfds_init (ANFD *base, int count) 1030static void noinline
1031pendingcb (EV_P_ ev_prepare *w, int revents)
334{ 1032{
335 while (count--)
336 {
337 base->head = 0;
338 base->events = EV_NONE;
339 base->reify = 0;
340
341 ++base;
342 }
343} 1033}
344 1034
345void 1035void noinline
346ev_feed_event (EV_P_ void *w, int revents) 1036ev_feed_event (EV_P_ void *w, int revents)
347{ 1037{
348 W w_ = (W)w; 1038 W w_ = (W)w;
1039 int pri = ABSPRI (w_);
349 1040
350 if (w_->pending) 1041 if (expect_false (w_->pending))
1042 pendings [pri][w_->pending - 1].events |= revents;
1043 else
351 { 1044 {
1045 w_->pending = ++pendingcnt [pri];
1046 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1047 pendings [pri][w_->pending - 1].w = w_;
352 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1048 pendings [pri][w_->pending - 1].events = revents;
353 return;
354 } 1049 }
355
356 w_->pending = ++pendingcnt [ABSPRI (w_)];
357 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
358 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
359 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
360} 1050}
361 1051
362static void 1052inline_speed void
1053feed_reverse (EV_P_ W w)
1054{
1055 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1056 rfeeds [rfeedcnt++] = w;
1057}
1058
1059inline_size void
1060feed_reverse_done (EV_P_ int revents)
1061{
1062 do
1063 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1064 while (rfeedcnt);
1065}
1066
1067inline_speed void
363queue_events (EV_P_ W *events, int eventcnt, int type) 1068queue_events (EV_P_ W *events, int eventcnt, int type)
364{ 1069{
365 int i; 1070 int i;
366 1071
367 for (i = 0; i < eventcnt; ++i) 1072 for (i = 0; i < eventcnt; ++i)
368 ev_feed_event (EV_A_ events [i], type); 1073 ev_feed_event (EV_A_ events [i], type);
369} 1074}
370 1075
1076/*****************************************************************************/
1077
371inline void 1078inline_speed void
372fd_event (EV_P_ int fd, int revents) 1079fd_event_nocheck (EV_P_ int fd, int revents)
373{ 1080{
374 ANFD *anfd = anfds + fd; 1081 ANFD *anfd = anfds + fd;
375 struct ev_io *w; 1082 ev_io *w;
376 1083
377 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 1084 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
378 { 1085 {
379 int ev = w->events & revents; 1086 int ev = w->events & revents;
380 1087
381 if (ev) 1088 if (ev)
382 ev_feed_event (EV_A_ (W)w, ev); 1089 ev_feed_event (EV_A_ (W)w, ev);
383 } 1090 }
384} 1091}
385 1092
1093/* do not submit kernel events for fds that have reify set */
1094/* because that means they changed while we were polling for new events */
1095inline_speed void
1096fd_event (EV_P_ int fd, int revents)
1097{
1098 ANFD *anfd = anfds + fd;
1099
1100 if (expect_true (!anfd->reify))
1101 fd_event_nocheck (EV_A_ fd, revents);
1102}
1103
386void 1104void
387ev_feed_fd_event (EV_P_ int fd, int revents) 1105ev_feed_fd_event (EV_P_ int fd, int revents)
388{ 1106{
1107 if (fd >= 0 && fd < anfdmax)
389 fd_event (EV_A_ fd, revents); 1108 fd_event_nocheck (EV_A_ fd, revents);
390} 1109}
391 1110
392/*****************************************************************************/ 1111/* make sure the external fd watch events are in-sync */
393 1112/* with the kernel/libev internal state */
394static void 1113inline_size void
395fd_reify (EV_P) 1114fd_reify (EV_P)
396{ 1115{
397 int i; 1116 int i;
398 1117
1118#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
399 for (i = 0; i < fdchangecnt; ++i) 1119 for (i = 0; i < fdchangecnt; ++i)
400 { 1120 {
401 int fd = fdchanges [i]; 1121 int fd = fdchanges [i];
402 ANFD *anfd = anfds + fd; 1122 ANFD *anfd = anfds + fd;
1123
1124 if (anfd->reify & EV__IOFDSET && anfd->head)
1125 {
1126 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1127
1128 if (handle != anfd->handle)
1129 {
1130 unsigned long arg;
1131
1132 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1133
1134 /* handle changed, but fd didn't - we need to do it in two steps */
1135 backend_modify (EV_A_ fd, anfd->events, 0);
1136 anfd->events = 0;
1137 anfd->handle = handle;
1138 }
1139 }
1140 }
1141#endif
1142
1143 for (i = 0; i < fdchangecnt; ++i)
1144 {
1145 int fd = fdchanges [i];
1146 ANFD *anfd = anfds + fd;
403 struct ev_io *w; 1147 ev_io *w;
404 1148
405 int events = 0; 1149 unsigned char o_events = anfd->events;
1150 unsigned char o_reify = anfd->reify;
406 1151
407 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
408 events |= w->events;
409
410 anfd->reify = 0; 1152 anfd->reify = 0;
411 1153
412 method_modify (EV_A_ fd, anfd->events, events); 1154 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1155 {
413 anfd->events = events; 1156 anfd->events = 0;
1157
1158 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1159 anfd->events |= (unsigned char)w->events;
1160
1161 if (o_events != anfd->events)
1162 o_reify = EV__IOFDSET; /* actually |= */
1163 }
1164
1165 if (o_reify & EV__IOFDSET)
1166 backend_modify (EV_A_ fd, o_events, anfd->events);
414 } 1167 }
415 1168
416 fdchangecnt = 0; 1169 fdchangecnt = 0;
417} 1170}
418 1171
419static void 1172/* something about the given fd changed */
1173inline_size void
420fd_change (EV_P_ int fd) 1174fd_change (EV_P_ int fd, int flags)
421{ 1175{
422 if (anfds [fd].reify) 1176 unsigned char reify = anfds [fd].reify;
423 return;
424
425 anfds [fd].reify = 1; 1177 anfds [fd].reify |= flags;
426 1178
1179 if (expect_true (!reify))
1180 {
427 ++fdchangecnt; 1181 ++fdchangecnt;
428 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 1182 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
429 fdchanges [fdchangecnt - 1] = fd; 1183 fdchanges [fdchangecnt - 1] = fd;
1184 }
430} 1185}
431 1186
432static void 1187/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1188inline_speed void ecb_cold
433fd_kill (EV_P_ int fd) 1189fd_kill (EV_P_ int fd)
434{ 1190{
435 struct ev_io *w; 1191 ev_io *w;
436 1192
437 while ((w = (struct ev_io *)anfds [fd].head)) 1193 while ((w = (ev_io *)anfds [fd].head))
438 { 1194 {
439 ev_io_stop (EV_A_ w); 1195 ev_io_stop (EV_A_ w);
440 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1196 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
441 } 1197 }
442} 1198}
443 1199
444static int 1200/* check whether the given fd is actually valid, for error recovery */
1201inline_size int ecb_cold
445fd_valid (int fd) 1202fd_valid (int fd)
446{ 1203{
447#ifdef WIN32 1204#ifdef _WIN32
448 return !!win32_get_osfhandle (fd); 1205 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
449#else 1206#else
450 return fcntl (fd, F_GETFD) != -1; 1207 return fcntl (fd, F_GETFD) != -1;
451#endif 1208#endif
452} 1209}
453 1210
454/* called on EBADF to verify fds */ 1211/* called on EBADF to verify fds */
455static void 1212static void noinline ecb_cold
456fd_ebadf (EV_P) 1213fd_ebadf (EV_P)
457{ 1214{
458 int fd; 1215 int fd;
459 1216
460 for (fd = 0; fd < anfdmax; ++fd) 1217 for (fd = 0; fd < anfdmax; ++fd)
461 if (anfds [fd].events) 1218 if (anfds [fd].events)
462 if (!fd_valid (fd) == -1 && errno == EBADF) 1219 if (!fd_valid (fd) && errno == EBADF)
463 fd_kill (EV_A_ fd); 1220 fd_kill (EV_A_ fd);
464} 1221}
465 1222
466/* called on ENOMEM in select/poll to kill some fds and retry */ 1223/* called on ENOMEM in select/poll to kill some fds and retry */
467static void 1224static void noinline ecb_cold
468fd_enomem (EV_P) 1225fd_enomem (EV_P)
469{ 1226{
470 int fd; 1227 int fd;
471 1228
472 for (fd = anfdmax; fd--; ) 1229 for (fd = anfdmax; fd--; )
473 if (anfds [fd].events) 1230 if (anfds [fd].events)
474 { 1231 {
475 fd_kill (EV_A_ fd); 1232 fd_kill (EV_A_ fd);
476 return; 1233 break;
477 } 1234 }
478} 1235}
479 1236
480/* usually called after fork if method needs to re-arm all fds from scratch */ 1237/* usually called after fork if backend needs to re-arm all fds from scratch */
481static void 1238static void noinline
482fd_rearm_all (EV_P) 1239fd_rearm_all (EV_P)
483{ 1240{
484 int fd; 1241 int fd;
485 1242
486 /* this should be highly optimised to not do anything but set a flag */
487 for (fd = 0; fd < anfdmax; ++fd) 1243 for (fd = 0; fd < anfdmax; ++fd)
488 if (anfds [fd].events) 1244 if (anfds [fd].events)
489 { 1245 {
490 anfds [fd].events = 0; 1246 anfds [fd].events = 0;
491 fd_change (EV_A_ fd); 1247 anfds [fd].emask = 0;
1248 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
492 } 1249 }
493} 1250}
494 1251
1252/* used to prepare libev internal fd's */
1253/* this is not fork-safe */
1254inline_speed void
1255fd_intern (int fd)
1256{
1257#ifdef _WIN32
1258 unsigned long arg = 1;
1259 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1260#else
1261 fcntl (fd, F_SETFD, FD_CLOEXEC);
1262 fcntl (fd, F_SETFL, O_NONBLOCK);
1263#endif
1264}
1265
495/*****************************************************************************/ 1266/*****************************************************************************/
496 1267
1268/*
1269 * the heap functions want a real array index. array index 0 is guaranteed to not
1270 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1271 * the branching factor of the d-tree.
1272 */
1273
1274/*
1275 * at the moment we allow libev the luxury of two heaps,
1276 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1277 * which is more cache-efficient.
1278 * the difference is about 5% with 50000+ watchers.
1279 */
1280#if EV_USE_4HEAP
1281
1282#define DHEAP 4
1283#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1284#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1285#define UPHEAP_DONE(p,k) ((p) == (k))
1286
1287/* away from the root */
1288inline_speed void
1289downheap (ANHE *heap, int N, int k)
1290{
1291 ANHE he = heap [k];
1292 ANHE *E = heap + N + HEAP0;
1293
1294 for (;;)
1295 {
1296 ev_tstamp minat;
1297 ANHE *minpos;
1298 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1299
1300 /* find minimum child */
1301 if (expect_true (pos + DHEAP - 1 < E))
1302 {
1303 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1304 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1305 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1306 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1307 }
1308 else if (pos < E)
1309 {
1310 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1311 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1312 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1313 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1314 }
1315 else
1316 break;
1317
1318 if (ANHE_at (he) <= minat)
1319 break;
1320
1321 heap [k] = *minpos;
1322 ev_active (ANHE_w (*minpos)) = k;
1323
1324 k = minpos - heap;
1325 }
1326
1327 heap [k] = he;
1328 ev_active (ANHE_w (he)) = k;
1329}
1330
1331#else /* 4HEAP */
1332
1333#define HEAP0 1
1334#define HPARENT(k) ((k) >> 1)
1335#define UPHEAP_DONE(p,k) (!(p))
1336
1337/* away from the root */
1338inline_speed void
1339downheap (ANHE *heap, int N, int k)
1340{
1341 ANHE he = heap [k];
1342
1343 for (;;)
1344 {
1345 int c = k << 1;
1346
1347 if (c >= N + HEAP0)
1348 break;
1349
1350 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1351 ? 1 : 0;
1352
1353 if (ANHE_at (he) <= ANHE_at (heap [c]))
1354 break;
1355
1356 heap [k] = heap [c];
1357 ev_active (ANHE_w (heap [k])) = k;
1358
1359 k = c;
1360 }
1361
1362 heap [k] = he;
1363 ev_active (ANHE_w (he)) = k;
1364}
1365#endif
1366
1367/* towards the root */
1368inline_speed void
1369upheap (ANHE *heap, int k)
1370{
1371 ANHE he = heap [k];
1372
1373 for (;;)
1374 {
1375 int p = HPARENT (k);
1376
1377 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1378 break;
1379
1380 heap [k] = heap [p];
1381 ev_active (ANHE_w (heap [k])) = k;
1382 k = p;
1383 }
1384
1385 heap [k] = he;
1386 ev_active (ANHE_w (he)) = k;
1387}
1388
1389/* move an element suitably so it is in a correct place */
1390inline_size void
1391adjustheap (ANHE *heap, int N, int k)
1392{
1393 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1394 upheap (heap, k);
1395 else
1396 downheap (heap, N, k);
1397}
1398
1399/* rebuild the heap: this function is used only once and executed rarely */
1400inline_size void
1401reheap (ANHE *heap, int N)
1402{
1403 int i;
1404
1405 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1406 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1407 for (i = 0; i < N; ++i)
1408 upheap (heap, i + HEAP0);
1409}
1410
1411/*****************************************************************************/
1412
1413/* associate signal watchers to a signal signal */
1414typedef struct
1415{
1416 EV_ATOMIC_T pending;
1417#if EV_MULTIPLICITY
1418 EV_P;
1419#endif
1420 WL head;
1421} ANSIG;
1422
1423static ANSIG signals [EV_NSIG - 1];
1424
1425/*****************************************************************************/
1426
1427#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1428
1429static void noinline ecb_cold
1430evpipe_init (EV_P)
1431{
1432 if (!ev_is_active (&pipe_w))
1433 {
1434# if EV_USE_EVENTFD
1435 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1436 if (evfd < 0 && errno == EINVAL)
1437 evfd = eventfd (0, 0);
1438
1439 if (evfd >= 0)
1440 {
1441 evpipe [0] = -1;
1442 fd_intern (evfd); /* doing it twice doesn't hurt */
1443 ev_io_set (&pipe_w, evfd, EV_READ);
1444 }
1445 else
1446# endif
1447 {
1448 while (pipe (evpipe))
1449 ev_syserr ("(libev) error creating signal/async pipe");
1450
1451 fd_intern (evpipe [0]);
1452 fd_intern (evpipe [1]);
1453 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1454 }
1455
1456 ev_io_start (EV_A_ &pipe_w);
1457 ev_unref (EV_A); /* watcher should not keep loop alive */
1458 }
1459}
1460
1461inline_speed void
1462evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1463{
1464 if (expect_true (*flag))
1465 return;
1466
1467 *flag = 1;
1468
1469 ECB_MEMORY_FENCE_RELEASE;
1470
1471 pipe_write_skipped = 1;
1472
1473 ECB_MEMORY_FENCE;
1474
1475 if (pipe_write_wanted)
1476 {
1477 int old_errno;
1478
1479 pipe_write_skipped = 0; /* optimisation only */
1480
1481 old_errno = errno; /* save errno because write will clobber it */
1482
1483#if EV_USE_EVENTFD
1484 if (evfd >= 0)
1485 {
1486 uint64_t counter = 1;
1487 write (evfd, &counter, sizeof (uint64_t));
1488 }
1489 else
1490#endif
1491 {
1492 /* win32 people keep sending patches that change this write() to send() */
1493 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1494 /* so when you think this write should be a send instead, please find out */
1495 /* where your send() is from - it's definitely not the microsoft send, and */
1496 /* tell me. thank you. */
1497 write (evpipe [1], &(evpipe [1]), 1);
1498 }
1499
1500 errno = old_errno;
1501 }
1502}
1503
1504/* called whenever the libev signal pipe */
1505/* got some events (signal, async) */
497static void 1506static void
498upheap (WT *heap, int k) 1507pipecb (EV_P_ ev_io *iow, int revents)
499{ 1508{
500 WT w = heap [k]; 1509 int i;
501 1510
502 while (k && heap [k >> 1]->at > w->at) 1511 if (revents & EV_READ)
503 {
504 heap [k] = heap [k >> 1];
505 ((W)heap [k])->active = k + 1;
506 k >>= 1;
507 } 1512 {
1513#if EV_USE_EVENTFD
1514 if (evfd >= 0)
1515 {
1516 uint64_t counter;
1517 read (evfd, &counter, sizeof (uint64_t));
1518 }
1519 else
1520#endif
1521 {
1522 char dummy;
1523 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1524 read (evpipe [0], &dummy, 1);
1525 }
1526 }
508 1527
509 heap [k] = w; 1528 pipe_write_skipped = 0;
510 ((W)heap [k])->active = k + 1;
511 1529
1530#if EV_SIGNAL_ENABLE
1531 if (sig_pending)
1532 {
1533 sig_pending = 0;
1534
1535 for (i = EV_NSIG - 1; i--; )
1536 if (expect_false (signals [i].pending))
1537 ev_feed_signal_event (EV_A_ i + 1);
1538 }
1539#endif
1540
1541#if EV_ASYNC_ENABLE
1542 if (async_pending)
1543 {
1544 async_pending = 0;
1545
1546 for (i = asynccnt; i--; )
1547 if (asyncs [i]->sent)
1548 {
1549 asyncs [i]->sent = 0;
1550 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1551 }
1552 }
1553#endif
1554}
1555
1556/*****************************************************************************/
1557
1558void
1559ev_feed_signal (int signum)
1560{
1561#if EV_MULTIPLICITY
1562 EV_P = signals [signum - 1].loop;
1563
1564 if (!EV_A)
1565 return;
1566#endif
1567
1568 if (!ev_active (&pipe_w))
1569 return;
1570
1571 signals [signum - 1].pending = 1;
1572 evpipe_write (EV_A_ &sig_pending);
512} 1573}
513 1574
514static void 1575static void
515downheap (WT *heap, int N, int k)
516{
517 WT w = heap [k];
518
519 while (k < (N >> 1))
520 {
521 int j = k << 1;
522
523 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
524 ++j;
525
526 if (w->at <= heap [j]->at)
527 break;
528
529 heap [k] = heap [j];
530 ((W)heap [k])->active = k + 1;
531 k = j;
532 }
533
534 heap [k] = w;
535 ((W)heap [k])->active = k + 1;
536}
537
538inline void
539adjustheap (WT *heap, int N, int k, ev_tstamp at)
540{
541 ev_tstamp old_at = heap [k]->at;
542 heap [k]->at = at;
543
544 if (old_at < at)
545 downheap (heap, N, k);
546 else
547 upheap (heap, k);
548}
549
550/*****************************************************************************/
551
552typedef struct
553{
554 WL head;
555 sig_atomic_t volatile gotsig;
556} ANSIG;
557
558static ANSIG *signals;
559static int signalmax;
560
561static int sigpipe [2];
562static sig_atomic_t volatile gotsig;
563static struct ev_io sigev;
564
565static void
566signals_init (ANSIG *base, int count)
567{
568 while (count--)
569 {
570 base->head = 0;
571 base->gotsig = 0;
572
573 ++base;
574 }
575}
576
577static void
578sighandler (int signum) 1576ev_sighandler (int signum)
579{ 1577{
580#if WIN32
581 signal (signum, sighandler);
582#endif
583
584 signals [signum - 1].gotsig = 1;
585
586 if (!gotsig)
587 {
588 int old_errno = errno;
589 gotsig = 1;
590#ifdef WIN32 1578#ifdef _WIN32
591 send (sigpipe [1], &signum, 1, MSG_DONTWAIT); 1579 signal (signum, ev_sighandler);
592#else
593 write (sigpipe [1], &signum, 1);
594#endif 1580#endif
595 errno = old_errno;
596 }
597}
598 1581
599void 1582 ev_feed_signal (signum);
1583}
1584
1585void noinline
600ev_feed_signal_event (EV_P_ int signum) 1586ev_feed_signal_event (EV_P_ int signum)
601{ 1587{
602 WL w; 1588 WL w;
603 1589
1590 if (expect_false (signum <= 0 || signum > EV_NSIG))
1591 return;
1592
1593 --signum;
1594
604#if EV_MULTIPLICITY 1595#if EV_MULTIPLICITY
605 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1596 /* it is permissible to try to feed a signal to the wrong loop */
606#endif 1597 /* or, likely more useful, feeding a signal nobody is waiting for */
607 1598
608 --signum; 1599 if (expect_false (signals [signum].loop != EV_A))
609
610 if (signum < 0 || signum >= signalmax)
611 return; 1600 return;
1601#endif
612 1602
613 signals [signum].gotsig = 0; 1603 signals [signum].pending = 0;
614 1604
615 for (w = signals [signum].head; w; w = w->next) 1605 for (w = signals [signum].head; w; w = w->next)
616 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1606 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
617} 1607}
618 1608
1609#if EV_USE_SIGNALFD
619static void 1610static void
620sigcb (EV_P_ struct ev_io *iow, int revents) 1611sigfdcb (EV_P_ ev_io *iow, int revents)
621{ 1612{
622 int signum; 1613 struct signalfd_siginfo si[2], *sip; /* these structs are big */
623 1614
624#ifdef WIN32 1615 for (;;)
625 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 1616 {
626#else 1617 ssize_t res = read (sigfd, si, sizeof (si));
627 read (sigpipe [0], &revents, 1);
628#endif
629 gotsig = 0;
630 1618
631 for (signum = signalmax; signum--; ) 1619 /* not ISO-C, as res might be -1, but works with SuS */
632 if (signals [signum].gotsig) 1620 for (sip = si; (char *)sip < (char *)si + res; ++sip)
633 ev_feed_signal_event (EV_A_ signum + 1); 1621 ev_feed_signal_event (EV_A_ sip->ssi_signo);
634}
635 1622
636static void 1623 if (res < (ssize_t)sizeof (si))
637siginit (EV_P) 1624 break;
638{ 1625 }
639#ifndef WIN32
640 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
641 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
642
643 /* rather than sort out wether we really need nb, set it */
644 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
645 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
646#endif
647
648 ev_io_set (&sigev, sigpipe [0], EV_READ);
649 ev_io_start (EV_A_ &sigev);
650 ev_unref (EV_A); /* child watcher should not keep loop alive */
651} 1626}
1627#endif
1628
1629#endif
652 1630
653/*****************************************************************************/ 1631/*****************************************************************************/
654 1632
655static struct ev_child *childs [PID_HASHSIZE]; 1633#if EV_CHILD_ENABLE
1634static WL childs [EV_PID_HASHSIZE];
656 1635
657#ifndef WIN32
658
659static struct ev_signal childev; 1636static ev_signal childev;
1637
1638#ifndef WIFCONTINUED
1639# define WIFCONTINUED(status) 0
1640#endif
1641
1642/* handle a single child status event */
1643inline_speed void
1644child_reap (EV_P_ int chain, int pid, int status)
1645{
1646 ev_child *w;
1647 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1648
1649 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1650 {
1651 if ((w->pid == pid || !w->pid)
1652 && (!traced || (w->flags & 1)))
1653 {
1654 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1655 w->rpid = pid;
1656 w->rstatus = status;
1657 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1658 }
1659 }
1660}
660 1661
661#ifndef WCONTINUED 1662#ifndef WCONTINUED
662# define WCONTINUED 0 1663# define WCONTINUED 0
663#endif 1664#endif
664 1665
1666/* called on sigchld etc., calls waitpid */
665static void 1667static void
666child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
667{
668 struct ev_child *w;
669
670 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
671 if (w->pid == pid || !w->pid)
672 {
673 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
674 w->rpid = pid;
675 w->rstatus = status;
676 ev_feed_event (EV_A_ (W)w, EV_CHILD);
677 }
678}
679
680static void
681childcb (EV_P_ struct ev_signal *sw, int revents) 1668childcb (EV_P_ ev_signal *sw, int revents)
682{ 1669{
683 int pid, status; 1670 int pid, status;
684 1671
1672 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
685 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1673 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
686 { 1674 if (!WCONTINUED
1675 || errno != EINVAL
1676 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1677 return;
1678
687 /* make sure we are called again until all childs have been reaped */ 1679 /* make sure we are called again until all children have been reaped */
1680 /* we need to do it this way so that the callback gets called before we continue */
688 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1681 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
689 1682
690 child_reap (EV_A_ sw, pid, pid, status); 1683 child_reap (EV_A_ pid, pid, status);
1684 if ((EV_PID_HASHSIZE) > 1)
691 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1685 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
692 }
693} 1686}
694 1687
695#endif 1688#endif
696 1689
697/*****************************************************************************/ 1690/*****************************************************************************/
698 1691
1692#if EV_USE_IOCP
1693# include "ev_iocp.c"
1694#endif
1695#if EV_USE_PORT
1696# include "ev_port.c"
1697#endif
699#if EV_USE_KQUEUE 1698#if EV_USE_KQUEUE
700# include "ev_kqueue.c" 1699# include "ev_kqueue.c"
701#endif 1700#endif
702#if EV_USE_EPOLL 1701#if EV_USE_EPOLL
703# include "ev_epoll.c" 1702# include "ev_epoll.c"
… …
707#endif 1706#endif
708#if EV_USE_SELECT 1707#if EV_USE_SELECT
709# include "ev_select.c" 1708# include "ev_select.c"
710#endif 1709#endif
711 1710
712int 1711int ecb_cold
713ev_version_major (void) 1712ev_version_major (void)
714{ 1713{
715 return EV_VERSION_MAJOR; 1714 return EV_VERSION_MAJOR;
716} 1715}
717 1716
718int 1717int ecb_cold
719ev_version_minor (void) 1718ev_version_minor (void)
720{ 1719{
721 return EV_VERSION_MINOR; 1720 return EV_VERSION_MINOR;
722} 1721}
723 1722
724/* return true if we are running with elevated privileges and should ignore env variables */ 1723/* return true if we are running with elevated privileges and should ignore env variables */
725static int 1724int inline_size ecb_cold
726enable_secure (void) 1725enable_secure (void)
727{ 1726{
728#ifdef WIN32 1727#ifdef _WIN32
729 return 0; 1728 return 0;
730#else 1729#else
731 return getuid () != geteuid () 1730 return getuid () != geteuid ()
732 || getgid () != getegid (); 1731 || getgid () != getegid ();
733#endif 1732#endif
734} 1733}
735 1734
736int 1735unsigned int ecb_cold
1736ev_supported_backends (void)
1737{
1738 unsigned int flags = 0;
1739
1740 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1741 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1742 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1743 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1744 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1745
1746 return flags;
1747}
1748
1749unsigned int ecb_cold
1750ev_recommended_backends (void)
1751{
1752 unsigned int flags = ev_supported_backends ();
1753
1754#ifndef __NetBSD__
1755 /* kqueue is borked on everything but netbsd apparently */
1756 /* it usually doesn't work correctly on anything but sockets and pipes */
1757 flags &= ~EVBACKEND_KQUEUE;
1758#endif
1759#ifdef __APPLE__
1760 /* only select works correctly on that "unix-certified" platform */
1761 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1762 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1763#endif
1764#ifdef __FreeBSD__
1765 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1766#endif
1767
1768 return flags;
1769}
1770
1771unsigned int ecb_cold
1772ev_embeddable_backends (void)
1773{
1774 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1775
1776 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1777 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1778 flags &= ~EVBACKEND_EPOLL;
1779
1780 return flags;
1781}
1782
1783unsigned int
1784ev_backend (EV_P)
1785{
1786 return backend;
1787}
1788
1789#if EV_FEATURE_API
1790unsigned int
1791ev_iteration (EV_P)
1792{
1793 return loop_count;
1794}
1795
1796unsigned int
737ev_method (EV_P) 1797ev_depth (EV_P)
738{ 1798{
739 return method; 1799 return loop_depth;
740} 1800}
741 1801
742static void 1802void
743loop_init (EV_P_ int methods) 1803ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
744{ 1804{
745 if (!method) 1805 io_blocktime = interval;
1806}
1807
1808void
1809ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1810{
1811 timeout_blocktime = interval;
1812}
1813
1814void
1815ev_set_userdata (EV_P_ void *data)
1816{
1817 userdata = data;
1818}
1819
1820void *
1821ev_userdata (EV_P)
1822{
1823 return userdata;
1824}
1825
1826void
1827ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1828{
1829 invoke_cb = invoke_pending_cb;
1830}
1831
1832void
1833ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1834{
1835 release_cb = release;
1836 acquire_cb = acquire;
1837}
1838#endif
1839
1840/* initialise a loop structure, must be zero-initialised */
1841static void noinline ecb_cold
1842loop_init (EV_P_ unsigned int flags)
1843{
1844 if (!backend)
746 { 1845 {
1846 origflags = flags;
1847
1848#if EV_USE_REALTIME
1849 if (!have_realtime)
1850 {
1851 struct timespec ts;
1852
1853 if (!clock_gettime (CLOCK_REALTIME, &ts))
1854 have_realtime = 1;
1855 }
1856#endif
1857
747#if EV_USE_MONOTONIC 1858#if EV_USE_MONOTONIC
1859 if (!have_monotonic)
1860 {
1861 struct timespec ts;
1862
1863 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1864 have_monotonic = 1;
1865 }
1866#endif
1867
1868 /* pid check not overridable via env */
1869#ifndef _WIN32
1870 if (flags & EVFLAG_FORKCHECK)
1871 curpid = getpid ();
1872#endif
1873
1874 if (!(flags & EVFLAG_NOENV)
1875 && !enable_secure ()
1876 && getenv ("LIBEV_FLAGS"))
1877 flags = atoi (getenv ("LIBEV_FLAGS"));
1878
1879 ev_rt_now = ev_time ();
1880 mn_now = get_clock ();
1881 now_floor = mn_now;
1882 rtmn_diff = ev_rt_now - mn_now;
1883#if EV_FEATURE_API
1884 invoke_cb = ev_invoke_pending;
1885#endif
1886
1887 io_blocktime = 0.;
1888 timeout_blocktime = 0.;
1889 backend = 0;
1890 backend_fd = -1;
1891 sig_pending = 0;
1892#if EV_ASYNC_ENABLE
1893 async_pending = 0;
1894#endif
1895 pipe_write_skipped = 0;
1896 pipe_write_wanted = 0;
1897#if EV_USE_INOTIFY
1898 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1899#endif
1900#if EV_USE_SIGNALFD
1901 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1902#endif
1903
1904 if (!(flags & EVBACKEND_MASK))
1905 flags |= ev_recommended_backends ();
1906
1907#if EV_USE_IOCP
1908 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1909#endif
1910#if EV_USE_PORT
1911 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1912#endif
1913#if EV_USE_KQUEUE
1914 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1915#endif
1916#if EV_USE_EPOLL
1917 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1918#endif
1919#if EV_USE_POLL
1920 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1921#endif
1922#if EV_USE_SELECT
1923 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1924#endif
1925
1926 ev_prepare_init (&pending_w, pendingcb);
1927
1928#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1929 ev_init (&pipe_w, pipecb);
1930 ev_set_priority (&pipe_w, EV_MAXPRI);
1931#endif
1932 }
1933}
1934
1935/* free up a loop structure */
1936void ecb_cold
1937ev_loop_destroy (EV_P)
1938{
1939 int i;
1940
1941#if EV_MULTIPLICITY
1942 /* mimic free (0) */
1943 if (!EV_A)
1944 return;
1945#endif
1946
1947#if EV_CLEANUP_ENABLE
1948 /* queue cleanup watchers (and execute them) */
1949 if (expect_false (cleanupcnt))
1950 {
1951 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1952 EV_INVOKE_PENDING;
1953 }
1954#endif
1955
1956#if EV_CHILD_ENABLE
1957 if (ev_is_active (&childev))
1958 {
1959 ev_ref (EV_A); /* child watcher */
1960 ev_signal_stop (EV_A_ &childev);
1961 }
1962#endif
1963
1964 if (ev_is_active (&pipe_w))
1965 {
1966 /*ev_ref (EV_A);*/
1967 /*ev_io_stop (EV_A_ &pipe_w);*/
1968
1969#if EV_USE_EVENTFD
1970 if (evfd >= 0)
1971 close (evfd);
1972#endif
1973
1974 if (evpipe [0] >= 0)
1975 {
1976 EV_WIN32_CLOSE_FD (evpipe [0]);
1977 EV_WIN32_CLOSE_FD (evpipe [1]);
1978 }
1979 }
1980
1981#if EV_USE_SIGNALFD
1982 if (ev_is_active (&sigfd_w))
1983 close (sigfd);
1984#endif
1985
1986#if EV_USE_INOTIFY
1987 if (fs_fd >= 0)
1988 close (fs_fd);
1989#endif
1990
1991 if (backend_fd >= 0)
1992 close (backend_fd);
1993
1994#if EV_USE_IOCP
1995 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1996#endif
1997#if EV_USE_PORT
1998 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1999#endif
2000#if EV_USE_KQUEUE
2001 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2002#endif
2003#if EV_USE_EPOLL
2004 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2005#endif
2006#if EV_USE_POLL
2007 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2008#endif
2009#if EV_USE_SELECT
2010 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2011#endif
2012
2013 for (i = NUMPRI; i--; )
2014 {
2015 array_free (pending, [i]);
2016#if EV_IDLE_ENABLE
2017 array_free (idle, [i]);
2018#endif
2019 }
2020
2021 ev_free (anfds); anfds = 0; anfdmax = 0;
2022
2023 /* have to use the microsoft-never-gets-it-right macro */
2024 array_free (rfeed, EMPTY);
2025 array_free (fdchange, EMPTY);
2026 array_free (timer, EMPTY);
2027#if EV_PERIODIC_ENABLE
2028 array_free (periodic, EMPTY);
2029#endif
2030#if EV_FORK_ENABLE
2031 array_free (fork, EMPTY);
2032#endif
2033#if EV_CLEANUP_ENABLE
2034 array_free (cleanup, EMPTY);
2035#endif
2036 array_free (prepare, EMPTY);
2037 array_free (check, EMPTY);
2038#if EV_ASYNC_ENABLE
2039 array_free (async, EMPTY);
2040#endif
2041
2042 backend = 0;
2043
2044#if EV_MULTIPLICITY
2045 if (ev_is_default_loop (EV_A))
2046#endif
2047 ev_default_loop_ptr = 0;
2048#if EV_MULTIPLICITY
2049 else
2050 ev_free (EV_A);
2051#endif
2052}
2053
2054#if EV_USE_INOTIFY
2055inline_size void infy_fork (EV_P);
2056#endif
2057
2058inline_size void
2059loop_fork (EV_P)
2060{
2061#if EV_USE_PORT
2062 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2063#endif
2064#if EV_USE_KQUEUE
2065 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2066#endif
2067#if EV_USE_EPOLL
2068 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2069#endif
2070#if EV_USE_INOTIFY
2071 infy_fork (EV_A);
2072#endif
2073
2074 if (ev_is_active (&pipe_w))
2075 {
2076 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2077
2078 ev_ref (EV_A);
2079 ev_io_stop (EV_A_ &pipe_w);
2080
2081#if EV_USE_EVENTFD
2082 if (evfd >= 0)
2083 close (evfd);
2084#endif
2085
2086 if (evpipe [0] >= 0)
2087 {
2088 EV_WIN32_CLOSE_FD (evpipe [0]);
2089 EV_WIN32_CLOSE_FD (evpipe [1]);
2090 }
2091
2092#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2093 evpipe_init (EV_A);
2094 /* now iterate over everything, in case we missed something */
2095 pipecb (EV_A_ &pipe_w, EV_READ);
2096#endif
2097 }
2098
2099 postfork = 0;
2100}
2101
2102#if EV_MULTIPLICITY
2103
2104struct ev_loop * ecb_cold
2105ev_loop_new (unsigned int flags)
2106{
2107 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2108
2109 memset (EV_A, 0, sizeof (struct ev_loop));
2110 loop_init (EV_A_ flags);
2111
2112 if (ev_backend (EV_A))
2113 return EV_A;
2114
2115 ev_free (EV_A);
2116 return 0;
2117}
2118
2119#endif /* multiplicity */
2120
2121#if EV_VERIFY
2122static void noinline ecb_cold
2123verify_watcher (EV_P_ W w)
2124{
2125 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2126
2127 if (w->pending)
2128 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2129}
2130
2131static void noinline ecb_cold
2132verify_heap (EV_P_ ANHE *heap, int N)
2133{
2134 int i;
2135
2136 for (i = HEAP0; i < N + HEAP0; ++i)
2137 {
2138 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2139 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2140 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2141
2142 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2143 }
2144}
2145
2146static void noinline ecb_cold
2147array_verify (EV_P_ W *ws, int cnt)
2148{
2149 while (cnt--)
2150 {
2151 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2152 verify_watcher (EV_A_ ws [cnt]);
2153 }
2154}
2155#endif
2156
2157#if EV_FEATURE_API
2158void ecb_cold
2159ev_verify (EV_P)
2160{
2161#if EV_VERIFY
2162 int i;
2163 WL w;
2164
2165 assert (activecnt >= -1);
2166
2167 assert (fdchangemax >= fdchangecnt);
2168 for (i = 0; i < fdchangecnt; ++i)
2169 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2170
2171 assert (anfdmax >= 0);
2172 for (i = 0; i < anfdmax; ++i)
2173 for (w = anfds [i].head; w; w = w->next)
748 { 2174 {
749 struct timespec ts; 2175 verify_watcher (EV_A_ (W)w);
750 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2176 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
751 have_monotonic = 1; 2177 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
752 } 2178 }
753#endif
754 2179
755 ev_rt_now = ev_time (); 2180 assert (timermax >= timercnt);
756 mn_now = get_clock (); 2181 verify_heap (EV_A_ timers, timercnt);
757 now_floor = mn_now;
758 rtmn_diff = ev_rt_now - mn_now;
759 2182
760 if (methods == EVMETHOD_AUTO) 2183#if EV_PERIODIC_ENABLE
761 if (!enable_secure () && getenv ("LIBEV_METHODS")) 2184 assert (periodicmax >= periodiccnt);
762 methods = atoi (getenv ("LIBEV_METHODS")); 2185 verify_heap (EV_A_ periodics, periodiccnt);
763 else
764 methods = EVMETHOD_ANY;
765
766 method = 0;
767#if EV_USE_WIN32
768 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
769#endif
770#if EV_USE_KQUEUE
771 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
772#endif
773#if EV_USE_EPOLL
774 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
775#endif
776#if EV_USE_POLL
777 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
778#endif
779#if EV_USE_SELECT
780 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
781#endif
782
783 ev_init (&sigev, sigcb);
784 ev_set_priority (&sigev, EV_MAXPRI);
785 }
786}
787
788void
789loop_destroy (EV_P)
790{
791 int i;
792
793#if EV_USE_WIN32
794 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
795#endif
796#if EV_USE_KQUEUE
797 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
798#endif
799#if EV_USE_EPOLL
800 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
801#endif
802#if EV_USE_POLL
803 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
804#endif
805#if EV_USE_SELECT
806 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
807#endif 2186#endif
808 2187
809 for (i = NUMPRI; i--; ) 2188 for (i = NUMPRI; i--; )
810 array_free (pending, [i]); 2189 {
2190 assert (pendingmax [i] >= pendingcnt [i]);
2191#if EV_IDLE_ENABLE
2192 assert (idleall >= 0);
2193 assert (idlemax [i] >= idlecnt [i]);
2194 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2195#endif
2196 }
811 2197
812 /* have to use the microsoft-never-gets-it-right macro */ 2198#if EV_FORK_ENABLE
813 array_free_microshit (fdchange); 2199 assert (forkmax >= forkcnt);
814 array_free_microshit (timer); 2200 array_verify (EV_A_ (W *)forks, forkcnt);
815#if EV_PERIODICS 2201#endif
816 array_free_microshit (periodic); 2202
2203#if EV_CLEANUP_ENABLE
2204 assert (cleanupmax >= cleanupcnt);
2205 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2206#endif
2207
2208#if EV_ASYNC_ENABLE
2209 assert (asyncmax >= asynccnt);
2210 array_verify (EV_A_ (W *)asyncs, asynccnt);
2211#endif
2212
2213#if EV_PREPARE_ENABLE
2214 assert (preparemax >= preparecnt);
2215 array_verify (EV_A_ (W *)prepares, preparecnt);
2216#endif
2217
2218#if EV_CHECK_ENABLE
2219 assert (checkmax >= checkcnt);
2220 array_verify (EV_A_ (W *)checks, checkcnt);
2221#endif
2222
2223# if 0
2224#if EV_CHILD_ENABLE
2225 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2226 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2227#endif
817#endif 2228# endif
818 array_free_microshit (idle);
819 array_free_microshit (prepare);
820 array_free_microshit (check);
821
822 method = 0;
823}
824
825static void
826loop_fork (EV_P)
827{
828#if EV_USE_EPOLL
829 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
830#endif 2229#endif
831#if EV_USE_KQUEUE
832 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
833#endif
834
835 if (ev_is_active (&sigev))
836 {
837 /* default loop */
838
839 ev_ref (EV_A);
840 ev_io_stop (EV_A_ &sigev);
841 close (sigpipe [0]);
842 close (sigpipe [1]);
843
844 while (pipe (sigpipe))
845 syserr ("(libev) error creating pipe");
846
847 siginit (EV_A);
848 }
849
850 postfork = 0;
851} 2230}
2231#endif
852 2232
853#if EV_MULTIPLICITY 2233#if EV_MULTIPLICITY
854struct ev_loop * 2234struct ev_loop * ecb_cold
855ev_loop_new (int methods)
856{
857 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
858
859 memset (loop, 0, sizeof (struct ev_loop));
860
861 loop_init (EV_A_ methods);
862
863 if (ev_method (EV_A))
864 return loop;
865
866 return 0;
867}
868
869void
870ev_loop_destroy (EV_P)
871{
872 loop_destroy (EV_A);
873 ev_free (loop);
874}
875
876void
877ev_loop_fork (EV_P)
878{
879 postfork = 1;
880}
881
882#endif
883
884#if EV_MULTIPLICITY
885struct ev_loop *
886#else 2235#else
887int 2236int
888#endif 2237#endif
889ev_default_loop (int methods) 2238ev_default_loop (unsigned int flags)
890{ 2239{
891 if (sigpipe [0] == sigpipe [1])
892 if (pipe (sigpipe))
893 return 0;
894
895 if (!default_loop) 2240 if (!ev_default_loop_ptr)
896 { 2241 {
897#if EV_MULTIPLICITY 2242#if EV_MULTIPLICITY
898 struct ev_loop *loop = default_loop = &default_loop_struct; 2243 EV_P = ev_default_loop_ptr = &default_loop_struct;
899#else 2244#else
900 default_loop = 1; 2245 ev_default_loop_ptr = 1;
901#endif 2246#endif
902 2247
903 loop_init (EV_A_ methods); 2248 loop_init (EV_A_ flags);
904 2249
905 if (ev_method (EV_A)) 2250 if (ev_backend (EV_A))
906 { 2251 {
907 siginit (EV_A); 2252#if EV_CHILD_ENABLE
908
909#ifndef WIN32
910 ev_signal_init (&childev, childcb, SIGCHLD); 2253 ev_signal_init (&childev, childcb, SIGCHLD);
911 ev_set_priority (&childev, EV_MAXPRI); 2254 ev_set_priority (&childev, EV_MAXPRI);
912 ev_signal_start (EV_A_ &childev); 2255 ev_signal_start (EV_A_ &childev);
913 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2256 ev_unref (EV_A); /* child watcher should not keep loop alive */
914#endif 2257#endif
915 } 2258 }
916 else 2259 else
917 default_loop = 0; 2260 ev_default_loop_ptr = 0;
918 } 2261 }
919 2262
920 return default_loop; 2263 return ev_default_loop_ptr;
921} 2264}
922 2265
923void 2266void
924ev_default_destroy (void) 2267ev_loop_fork (EV_P)
925{ 2268{
926#if EV_MULTIPLICITY 2269 postfork = 1; /* must be in line with ev_default_fork */
927 struct ev_loop *loop = default_loop;
928#endif
929
930#ifndef WIN32
931 ev_ref (EV_A); /* child watcher */
932 ev_signal_stop (EV_A_ &childev);
933#endif
934
935 ev_ref (EV_A); /* signal watcher */
936 ev_io_stop (EV_A_ &sigev);
937
938 close (sigpipe [0]); sigpipe [0] = 0;
939 close (sigpipe [1]); sigpipe [1] = 0;
940
941 loop_destroy (EV_A);
942} 2270}
2271
2272/*****************************************************************************/
943 2273
944void 2274void
945ev_default_fork (void) 2275ev_invoke (EV_P_ void *w, int revents)
946{ 2276{
947#if EV_MULTIPLICITY 2277 EV_CB_INVOKE ((W)w, revents);
948 struct ev_loop *loop = default_loop;
949#endif
950
951 if (method)
952 postfork = 1;
953} 2278}
954 2279
955/*****************************************************************************/ 2280unsigned int
956 2281ev_pending_count (EV_P)
957static int
958any_pending (EV_P)
959{ 2282{
960 int pri; 2283 int pri;
2284 unsigned int count = 0;
961 2285
962 for (pri = NUMPRI; pri--; ) 2286 for (pri = NUMPRI; pri--; )
963 if (pendingcnt [pri]) 2287 count += pendingcnt [pri];
964 return 1;
965 2288
966 return 0; 2289 return count;
967} 2290}
968 2291
969static void 2292void noinline
970call_pending (EV_P) 2293ev_invoke_pending (EV_P)
971{ 2294{
972 int pri; 2295 int pri;
973 2296
974 for (pri = NUMPRI; pri--; ) 2297 for (pri = NUMPRI; pri--; )
975 while (pendingcnt [pri]) 2298 while (pendingcnt [pri])
976 { 2299 {
977 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2300 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
978 2301
979 if (p->w)
980 {
981 p->w->pending = 0; 2302 p->w->pending = 0;
982 EV_CB_INVOKE (p->w, p->events); 2303 EV_CB_INVOKE (p->w, p->events);
983 } 2304 EV_FREQUENT_CHECK;
984 } 2305 }
985} 2306}
986 2307
987static void 2308#if EV_IDLE_ENABLE
2309/* make idle watchers pending. this handles the "call-idle */
2310/* only when higher priorities are idle" logic */
2311inline_size void
2312idle_reify (EV_P)
2313{
2314 if (expect_false (idleall))
2315 {
2316 int pri;
2317
2318 for (pri = NUMPRI; pri--; )
2319 {
2320 if (pendingcnt [pri])
2321 break;
2322
2323 if (idlecnt [pri])
2324 {
2325 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2326 break;
2327 }
2328 }
2329 }
2330}
2331#endif
2332
2333/* make timers pending */
2334inline_size void
988timers_reify (EV_P) 2335timers_reify (EV_P)
989{ 2336{
2337 EV_FREQUENT_CHECK;
2338
990 while (timercnt && ((WT)timers [0])->at <= mn_now) 2339 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
991 { 2340 {
992 struct ev_timer *w = timers [0]; 2341 do
993
994 assert (("inactive timer on timer heap detected", ev_is_active (w)));
995
996 /* first reschedule or stop timer */
997 if (w->repeat)
998 { 2342 {
2343 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2344
2345 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2346
2347 /* first reschedule or stop timer */
2348 if (w->repeat)
2349 {
2350 ev_at (w) += w->repeat;
2351 if (ev_at (w) < mn_now)
2352 ev_at (w) = mn_now;
2353
999 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2354 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1000 2355
1001 ((WT)w)->at += w->repeat; 2356 ANHE_at_cache (timers [HEAP0]);
1002 if (((WT)w)->at < mn_now)
1003 ((WT)w)->at = mn_now;
1004
1005 downheap ((WT *)timers, timercnt, 0); 2357 downheap (timers, timercnt, HEAP0);
2358 }
2359 else
2360 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2361
2362 EV_FREQUENT_CHECK;
2363 feed_reverse (EV_A_ (W)w);
1006 } 2364 }
1007 else 2365 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1008 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1009 2366
1010 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2367 feed_reverse_done (EV_A_ EV_TIMER);
2368 }
2369}
2370
2371#if EV_PERIODIC_ENABLE
2372
2373static void noinline
2374periodic_recalc (EV_P_ ev_periodic *w)
2375{
2376 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2377 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2378
2379 /* the above almost always errs on the low side */
2380 while (at <= ev_rt_now)
1011 } 2381 {
1012} 2382 ev_tstamp nat = at + w->interval;
1013 2383
1014#if EV_PERIODICS 2384 /* when resolution fails us, we use ev_rt_now */
1015static void 2385 if (expect_false (nat == at))
2386 {
2387 at = ev_rt_now;
2388 break;
2389 }
2390
2391 at = nat;
2392 }
2393
2394 ev_at (w) = at;
2395}
2396
2397/* make periodics pending */
2398inline_size void
1016periodics_reify (EV_P) 2399periodics_reify (EV_P)
1017{ 2400{
2401 EV_FREQUENT_CHECK;
2402
1018 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2403 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1019 { 2404 {
1020 struct ev_periodic *w = periodics [0]; 2405 int feed_count = 0;
1021 2406
2407 do
2408 {
2409 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2410
1022 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2411 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1023 2412
1024 /* first reschedule or stop timer */ 2413 /* first reschedule or stop timer */
2414 if (w->reschedule_cb)
2415 {
2416 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2417
2418 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2419
2420 ANHE_at_cache (periodics [HEAP0]);
2421 downheap (periodics, periodiccnt, HEAP0);
2422 }
2423 else if (w->interval)
2424 {
2425 periodic_recalc (EV_A_ w);
2426 ANHE_at_cache (periodics [HEAP0]);
2427 downheap (periodics, periodiccnt, HEAP0);
2428 }
2429 else
2430 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2431
2432 EV_FREQUENT_CHECK;
2433 feed_reverse (EV_A_ (W)w);
2434 }
2435 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2436
2437 feed_reverse_done (EV_A_ EV_PERIODIC);
2438 }
2439}
2440
2441/* simply recalculate all periodics */
2442/* TODO: maybe ensure that at least one event happens when jumping forward? */
2443static void noinline ecb_cold
2444periodics_reschedule (EV_P)
2445{
2446 int i;
2447
2448 /* adjust periodics after time jump */
2449 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2450 {
2451 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2452
1025 if (w->reschedule_cb) 2453 if (w->reschedule_cb)
2454 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2455 else if (w->interval)
2456 periodic_recalc (EV_A_ w);
2457
2458 ANHE_at_cache (periodics [i]);
2459 }
2460
2461 reheap (periodics, periodiccnt);
2462}
2463#endif
2464
2465/* adjust all timers by a given offset */
2466static void noinline ecb_cold
2467timers_reschedule (EV_P_ ev_tstamp adjust)
2468{
2469 int i;
2470
2471 for (i = 0; i < timercnt; ++i)
2472 {
2473 ANHE *he = timers + i + HEAP0;
2474 ANHE_w (*he)->at += adjust;
2475 ANHE_at_cache (*he);
2476 }
2477}
2478
2479/* fetch new monotonic and realtime times from the kernel */
2480/* also detect if there was a timejump, and act accordingly */
2481inline_speed void
2482time_update (EV_P_ ev_tstamp max_block)
2483{
2484#if EV_USE_MONOTONIC
2485 if (expect_true (have_monotonic))
2486 {
2487 int i;
2488 ev_tstamp odiff = rtmn_diff;
2489
2490 mn_now = get_clock ();
2491
2492 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2493 /* interpolate in the meantime */
2494 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1026 { 2495 {
1027 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2496 ev_rt_now = rtmn_diff + mn_now;
1028 2497 return;
1029 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1030 downheap ((WT *)periodics, periodiccnt, 0);
1031 } 2498 }
1032 else if (w->interval)
1033 {
1034 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1035 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1036 downheap ((WT *)periodics, periodiccnt, 0);
1037 }
1038 else
1039 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1040 2499
1041 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1042 }
1043}
1044
1045static void
1046periodics_reschedule (EV_P)
1047{
1048 int i;
1049
1050 /* adjust periodics after time jump */
1051 for (i = 0; i < periodiccnt; ++i)
1052 {
1053 struct ev_periodic *w = periodics [i];
1054
1055 if (w->reschedule_cb)
1056 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1057 else if (w->interval)
1058 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1059 }
1060
1061 /* now rebuild the heap */
1062 for (i = periodiccnt >> 1; i--; )
1063 downheap ((WT *)periodics, periodiccnt, i);
1064}
1065#endif
1066
1067inline int
1068time_update_monotonic (EV_P)
1069{
1070 mn_now = get_clock ();
1071
1072 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1073 {
1074 ev_rt_now = rtmn_diff + mn_now;
1075 return 0;
1076 }
1077 else
1078 {
1079 now_floor = mn_now; 2500 now_floor = mn_now;
1080 ev_rt_now = ev_time (); 2501 ev_rt_now = ev_time ();
1081 return 1;
1082 }
1083}
1084 2502
1085static void 2503 /* loop a few times, before making important decisions.
1086time_update (EV_P) 2504 * on the choice of "4": one iteration isn't enough,
1087{ 2505 * in case we get preempted during the calls to
1088 int i; 2506 * ev_time and get_clock. a second call is almost guaranteed
1089 2507 * to succeed in that case, though. and looping a few more times
1090#if EV_USE_MONOTONIC 2508 * doesn't hurt either as we only do this on time-jumps or
1091 if (expect_true (have_monotonic)) 2509 * in the unlikely event of having been preempted here.
1092 { 2510 */
1093 if (time_update_monotonic (EV_A)) 2511 for (i = 4; --i; )
1094 { 2512 {
1095 ev_tstamp odiff = rtmn_diff; 2513 ev_tstamp diff;
1096
1097 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1098 {
1099 rtmn_diff = ev_rt_now - mn_now; 2514 rtmn_diff = ev_rt_now - mn_now;
1100 2515
1101 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2516 diff = odiff - rtmn_diff;
2517
2518 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1102 return; /* all is well */ 2519 return; /* all is well */
1103 2520
1104 ev_rt_now = ev_time (); 2521 ev_rt_now = ev_time ();
1105 mn_now = get_clock (); 2522 mn_now = get_clock ();
1106 now_floor = mn_now; 2523 now_floor = mn_now;
1107 } 2524 }
1108 2525
2526 /* no timer adjustment, as the monotonic clock doesn't jump */
2527 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1109# if EV_PERIODICS 2528# if EV_PERIODIC_ENABLE
2529 periodics_reschedule (EV_A);
2530# endif
2531 }
2532 else
2533#endif
2534 {
2535 ev_rt_now = ev_time ();
2536
2537 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2538 {
2539 /* adjust timers. this is easy, as the offset is the same for all of them */
2540 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2541#if EV_PERIODIC_ENABLE
1110 periodics_reschedule (EV_A); 2542 periodics_reschedule (EV_A);
1111# endif 2543#endif
1112 /* no timer adjustment, as the monotonic clock doesn't jump */
1113 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1114 } 2544 }
1115 }
1116 else
1117#endif
1118 {
1119 ev_rt_now = ev_time ();
1120
1121 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1122 {
1123#if EV_PERIODICS
1124 periodics_reschedule (EV_A);
1125#endif
1126
1127 /* adjust timers. this is easy, as the offset is the same for all */
1128 for (i = 0; i < timercnt; ++i)
1129 ((WT)timers [i])->at += ev_rt_now - mn_now;
1130 }
1131 2545
1132 mn_now = ev_rt_now; 2546 mn_now = ev_rt_now;
1133 } 2547 }
1134} 2548}
1135 2549
1136void 2550void
1137ev_ref (EV_P)
1138{
1139 ++activecnt;
1140}
1141
1142void
1143ev_unref (EV_P)
1144{
1145 --activecnt;
1146}
1147
1148static int loop_done;
1149
1150void
1151ev_loop (EV_P_ int flags) 2551ev_run (EV_P_ int flags)
1152{ 2552{
1153 double block; 2553#if EV_FEATURE_API
1154 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2554 ++loop_depth;
2555#endif
2556
2557 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2558
2559 loop_done = EVBREAK_CANCEL;
2560
2561 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1155 2562
1156 do 2563 do
1157 { 2564 {
2565#if EV_VERIFY >= 2
2566 ev_verify (EV_A);
2567#endif
2568
2569#ifndef _WIN32
2570 if (expect_false (curpid)) /* penalise the forking check even more */
2571 if (expect_false (getpid () != curpid))
2572 {
2573 curpid = getpid ();
2574 postfork = 1;
2575 }
2576#endif
2577
2578#if EV_FORK_ENABLE
2579 /* we might have forked, so queue fork handlers */
2580 if (expect_false (postfork))
2581 if (forkcnt)
2582 {
2583 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2584 EV_INVOKE_PENDING;
2585 }
2586#endif
2587
2588#if EV_PREPARE_ENABLE
1158 /* queue check watchers (and execute them) */ 2589 /* queue prepare watchers (and execute them) */
1159 if (expect_false (preparecnt)) 2590 if (expect_false (preparecnt))
1160 { 2591 {
1161 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2592 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1162 call_pending (EV_A); 2593 EV_INVOKE_PENDING;
1163 } 2594 }
2595#endif
2596
2597 if (expect_false (loop_done))
2598 break;
1164 2599
1165 /* we might have forked, so reify kernel state if necessary */ 2600 /* we might have forked, so reify kernel state if necessary */
1166 if (expect_false (postfork)) 2601 if (expect_false (postfork))
1167 loop_fork (EV_A); 2602 loop_fork (EV_A);
1168 2603
1169 /* update fd-related kernel structures */ 2604 /* update fd-related kernel structures */
1170 fd_reify (EV_A); 2605 fd_reify (EV_A);
1171 2606
1172 /* calculate blocking time */ 2607 /* calculate blocking time */
2608 {
2609 ev_tstamp waittime = 0.;
2610 ev_tstamp sleeptime = 0.;
1173 2611
1174 /* we only need this for !monotonic clock or timers, but as we basically 2612 /* remember old timestamp for io_blocktime calculation */
1175 always have timers, we just calculate it always */ 2613 ev_tstamp prev_mn_now = mn_now;
1176#if EV_USE_MONOTONIC 2614
1177 if (expect_true (have_monotonic)) 2615 /* update time to cancel out callback processing overhead */
1178 time_update_monotonic (EV_A); 2616 time_update (EV_A_ 1e100);
1179 else 2617
1180#endif 2618 /* from now on, we want a pipe-wake-up */
2619 pipe_write_wanted = 1;
2620
2621 ECB_MEMORY_FENCE;
2622
2623 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1181 { 2624 {
1182 ev_rt_now = ev_time ();
1183 mn_now = ev_rt_now;
1184 }
1185
1186 if (flags & EVLOOP_NONBLOCK || idlecnt)
1187 block = 0.;
1188 else
1189 {
1190 block = MAX_BLOCKTIME; 2625 waittime = MAX_BLOCKTIME;
1191 2626
1192 if (timercnt) 2627 if (timercnt)
1193 { 2628 {
1194 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2629 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1195 if (block > to) block = to; 2630 if (waittime > to) waittime = to;
1196 } 2631 }
1197 2632
1198#if EV_PERIODICS 2633#if EV_PERIODIC_ENABLE
1199 if (periodiccnt) 2634 if (periodiccnt)
1200 { 2635 {
1201 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2636 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1202 if (block > to) block = to; 2637 if (waittime > to) waittime = to;
1203 } 2638 }
1204#endif 2639#endif
1205 2640
1206 if (block < 0.) block = 0.; 2641 /* don't let timeouts decrease the waittime below timeout_blocktime */
2642 if (expect_false (waittime < timeout_blocktime))
2643 waittime = timeout_blocktime;
2644
2645 /* at this point, we NEED to wait, so we have to ensure */
2646 /* to pass a minimum nonzero value to the backend */
2647 if (expect_false (waittime < backend_mintime))
2648 waittime = backend_mintime;
2649
2650 /* extra check because io_blocktime is commonly 0 */
2651 if (expect_false (io_blocktime))
2652 {
2653 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2654
2655 if (sleeptime > waittime - backend_mintime)
2656 sleeptime = waittime - backend_mintime;
2657
2658 if (expect_true (sleeptime > 0.))
2659 {
2660 ev_sleep (sleeptime);
2661 waittime -= sleeptime;
2662 }
2663 }
1207 } 2664 }
1208 2665
1209 method_poll (EV_A_ block); 2666#if EV_FEATURE_API
2667 ++loop_count;
2668#endif
2669 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2670 backend_poll (EV_A_ waittime);
2671 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1210 2672
2673 pipe_write_wanted = 0;
2674
2675 if (pipe_write_skipped)
2676 {
2677 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2678 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2679 }
2680
2681
1211 /* update ev_rt_now, do magic */ 2682 /* update ev_rt_now, do magic */
1212 time_update (EV_A); 2683 time_update (EV_A_ waittime + sleeptime);
2684 }
1213 2685
1214 /* queue pending timers and reschedule them */ 2686 /* queue pending timers and reschedule them */
1215 timers_reify (EV_A); /* relative timers called last */ 2687 timers_reify (EV_A); /* relative timers called last */
1216#if EV_PERIODICS 2688#if EV_PERIODIC_ENABLE
1217 periodics_reify (EV_A); /* absolute timers called first */ 2689 periodics_reify (EV_A); /* absolute timers called first */
1218#endif 2690#endif
1219 2691
2692#if EV_IDLE_ENABLE
1220 /* queue idle watchers unless io or timers are pending */ 2693 /* queue idle watchers unless other events are pending */
1221 if (idlecnt && !any_pending (EV_A)) 2694 idle_reify (EV_A);
1222 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2695#endif
1223 2696
2697#if EV_CHECK_ENABLE
1224 /* queue check watchers, to be executed first */ 2698 /* queue check watchers, to be executed first */
1225 if (checkcnt) 2699 if (expect_false (checkcnt))
1226 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2700 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2701#endif
1227 2702
1228 call_pending (EV_A); 2703 EV_INVOKE_PENDING;
1229 } 2704 }
1230 while (activecnt && !loop_done); 2705 while (expect_true (
2706 activecnt
2707 && !loop_done
2708 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2709 ));
1231 2710
1232 if (loop_done != 2) 2711 if (loop_done == EVBREAK_ONE)
1233 loop_done = 0; 2712 loop_done = EVBREAK_CANCEL;
2713
2714#if EV_FEATURE_API
2715 --loop_depth;
2716#endif
1234} 2717}
1235 2718
1236void 2719void
1237ev_unloop (EV_P_ int how) 2720ev_break (EV_P_ int how)
1238{ 2721{
1239 loop_done = how; 2722 loop_done = how;
1240} 2723}
1241 2724
2725void
2726ev_ref (EV_P)
2727{
2728 ++activecnt;
2729}
2730
2731void
2732ev_unref (EV_P)
2733{
2734 --activecnt;
2735}
2736
2737void
2738ev_now_update (EV_P)
2739{
2740 time_update (EV_A_ 1e100);
2741}
2742
2743void
2744ev_suspend (EV_P)
2745{
2746 ev_now_update (EV_A);
2747}
2748
2749void
2750ev_resume (EV_P)
2751{
2752 ev_tstamp mn_prev = mn_now;
2753
2754 ev_now_update (EV_A);
2755 timers_reschedule (EV_A_ mn_now - mn_prev);
2756#if EV_PERIODIC_ENABLE
2757 /* TODO: really do this? */
2758 periodics_reschedule (EV_A);
2759#endif
2760}
2761
1242/*****************************************************************************/ 2762/*****************************************************************************/
2763/* singly-linked list management, used when the expected list length is short */
1243 2764
1244inline void 2765inline_size void
1245wlist_add (WL *head, WL elem) 2766wlist_add (WL *head, WL elem)
1246{ 2767{
1247 elem->next = *head; 2768 elem->next = *head;
1248 *head = elem; 2769 *head = elem;
1249} 2770}
1250 2771
1251inline void 2772inline_size void
1252wlist_del (WL *head, WL elem) 2773wlist_del (WL *head, WL elem)
1253{ 2774{
1254 while (*head) 2775 while (*head)
1255 { 2776 {
1256 if (*head == elem) 2777 if (expect_true (*head == elem))
1257 { 2778 {
1258 *head = elem->next; 2779 *head = elem->next;
1259 return; 2780 break;
1260 } 2781 }
1261 2782
1262 head = &(*head)->next; 2783 head = &(*head)->next;
1263 } 2784 }
1264} 2785}
1265 2786
2787/* internal, faster, version of ev_clear_pending */
1266inline void 2788inline_speed void
1267ev_clear_pending (EV_P_ W w) 2789clear_pending (EV_P_ W w)
1268{ 2790{
1269 if (w->pending) 2791 if (w->pending)
1270 { 2792 {
1271 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2793 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1272 w->pending = 0; 2794 w->pending = 0;
1273 } 2795 }
1274} 2796}
1275 2797
2798int
2799ev_clear_pending (EV_P_ void *w)
2800{
2801 W w_ = (W)w;
2802 int pending = w_->pending;
2803
2804 if (expect_true (pending))
2805 {
2806 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2807 p->w = (W)&pending_w;
2808 w_->pending = 0;
2809 return p->events;
2810 }
2811 else
2812 return 0;
2813}
2814
1276inline void 2815inline_size void
2816pri_adjust (EV_P_ W w)
2817{
2818 int pri = ev_priority (w);
2819 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2820 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2821 ev_set_priority (w, pri);
2822}
2823
2824inline_speed void
1277ev_start (EV_P_ W w, int active) 2825ev_start (EV_P_ W w, int active)
1278{ 2826{
1279 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2827 pri_adjust (EV_A_ w);
1280 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1281
1282 w->active = active; 2828 w->active = active;
1283 ev_ref (EV_A); 2829 ev_ref (EV_A);
1284} 2830}
1285 2831
1286inline void 2832inline_size void
1287ev_stop (EV_P_ W w) 2833ev_stop (EV_P_ W w)
1288{ 2834{
1289 ev_unref (EV_A); 2835 ev_unref (EV_A);
1290 w->active = 0; 2836 w->active = 0;
1291} 2837}
1292 2838
1293/*****************************************************************************/ 2839/*****************************************************************************/
1294 2840
1295void 2841void noinline
1296ev_io_start (EV_P_ struct ev_io *w) 2842ev_io_start (EV_P_ ev_io *w)
1297{ 2843{
1298 int fd = w->fd; 2844 int fd = w->fd;
1299 2845
2846 if (expect_false (ev_is_active (w)))
2847 return;
2848
2849 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2850 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2851
2852 EV_FREQUENT_CHECK;
2853
2854 ev_start (EV_A_ (W)w, 1);
2855 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2856 wlist_add (&anfds[fd].head, (WL)w);
2857
2858 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2859 w->events &= ~EV__IOFDSET;
2860
2861 EV_FREQUENT_CHECK;
2862}
2863
2864void noinline
2865ev_io_stop (EV_P_ ev_io *w)
2866{
2867 clear_pending (EV_A_ (W)w);
2868 if (expect_false (!ev_is_active (w)))
2869 return;
2870
2871 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2872
2873 EV_FREQUENT_CHECK;
2874
2875 wlist_del (&anfds[w->fd].head, (WL)w);
2876 ev_stop (EV_A_ (W)w);
2877
2878 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2879
2880 EV_FREQUENT_CHECK;
2881}
2882
2883void noinline
2884ev_timer_start (EV_P_ ev_timer *w)
2885{
2886 if (expect_false (ev_is_active (w)))
2887 return;
2888
2889 ev_at (w) += mn_now;
2890
2891 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2892
2893 EV_FREQUENT_CHECK;
2894
2895 ++timercnt;
2896 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2897 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2898 ANHE_w (timers [ev_active (w)]) = (WT)w;
2899 ANHE_at_cache (timers [ev_active (w)]);
2900 upheap (timers, ev_active (w));
2901
2902 EV_FREQUENT_CHECK;
2903
2904 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2905}
2906
2907void noinline
2908ev_timer_stop (EV_P_ ev_timer *w)
2909{
2910 clear_pending (EV_A_ (W)w);
2911 if (expect_false (!ev_is_active (w)))
2912 return;
2913
2914 EV_FREQUENT_CHECK;
2915
2916 {
2917 int active = ev_active (w);
2918
2919 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2920
2921 --timercnt;
2922
2923 if (expect_true (active < timercnt + HEAP0))
2924 {
2925 timers [active] = timers [timercnt + HEAP0];
2926 adjustheap (timers, timercnt, active);
2927 }
2928 }
2929
2930 ev_at (w) -= mn_now;
2931
2932 ev_stop (EV_A_ (W)w);
2933
2934 EV_FREQUENT_CHECK;
2935}
2936
2937void noinline
2938ev_timer_again (EV_P_ ev_timer *w)
2939{
2940 EV_FREQUENT_CHECK;
2941
1300 if (ev_is_active (w)) 2942 if (ev_is_active (w))
1301 return;
1302
1303 assert (("ev_io_start called with negative fd", fd >= 0));
1304
1305 ev_start (EV_A_ (W)w, 1);
1306 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1307 wlist_add ((WL *)&anfds[fd].head, (WL)w);
1308
1309 fd_change (EV_A_ fd);
1310}
1311
1312void
1313ev_io_stop (EV_P_ struct ev_io *w)
1314{
1315 ev_clear_pending (EV_A_ (W)w);
1316 if (!ev_is_active (w))
1317 return;
1318
1319 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1320
1321 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1322 ev_stop (EV_A_ (W)w);
1323
1324 fd_change (EV_A_ w->fd);
1325}
1326
1327void
1328ev_timer_start (EV_P_ struct ev_timer *w)
1329{
1330 if (ev_is_active (w))
1331 return;
1332
1333 ((WT)w)->at += mn_now;
1334
1335 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1336
1337 ev_start (EV_A_ (W)w, ++timercnt);
1338 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1339 timers [timercnt - 1] = w;
1340 upheap ((WT *)timers, timercnt - 1);
1341
1342 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1343}
1344
1345void
1346ev_timer_stop (EV_P_ struct ev_timer *w)
1347{
1348 ev_clear_pending (EV_A_ (W)w);
1349 if (!ev_is_active (w))
1350 return;
1351
1352 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1353
1354 if (((W)w)->active < timercnt--)
1355 {
1356 timers [((W)w)->active - 1] = timers [timercnt];
1357 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1358 }
1359
1360 ((WT)w)->at -= mn_now;
1361
1362 ev_stop (EV_A_ (W)w);
1363}
1364
1365void
1366ev_timer_again (EV_P_ struct ev_timer *w)
1367{
1368 if (ev_is_active (w))
1369 { 2943 {
1370 if (w->repeat) 2944 if (w->repeat)
1371 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat); 2945 {
2946 ev_at (w) = mn_now + w->repeat;
2947 ANHE_at_cache (timers [ev_active (w)]);
2948 adjustheap (timers, timercnt, ev_active (w));
2949 }
1372 else 2950 else
1373 ev_timer_stop (EV_A_ w); 2951 ev_timer_stop (EV_A_ w);
1374 } 2952 }
1375 else if (w->repeat) 2953 else if (w->repeat)
2954 {
2955 ev_at (w) = w->repeat;
1376 ev_timer_start (EV_A_ w); 2956 ev_timer_start (EV_A_ w);
1377} 2957 }
1378 2958
2959 EV_FREQUENT_CHECK;
2960}
2961
2962ev_tstamp
2963ev_timer_remaining (EV_P_ ev_timer *w)
2964{
2965 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2966}
2967
1379#if EV_PERIODICS 2968#if EV_PERIODIC_ENABLE
1380void 2969void noinline
1381ev_periodic_start (EV_P_ struct ev_periodic *w) 2970ev_periodic_start (EV_P_ ev_periodic *w)
1382{ 2971{
1383 if (ev_is_active (w)) 2972 if (expect_false (ev_is_active (w)))
1384 return; 2973 return;
1385 2974
1386 if (w->reschedule_cb) 2975 if (w->reschedule_cb)
1387 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2976 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1388 else if (w->interval) 2977 else if (w->interval)
1389 { 2978 {
1390 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2979 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1391 /* this formula differs from the one in periodic_reify because we do not always round up */ 2980 periodic_recalc (EV_A_ w);
1392 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1393 } 2981 }
2982 else
2983 ev_at (w) = w->offset;
1394 2984
2985 EV_FREQUENT_CHECK;
2986
2987 ++periodiccnt;
1395 ev_start (EV_A_ (W)w, ++periodiccnt); 2988 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1396 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2989 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1397 periodics [periodiccnt - 1] = w; 2990 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1398 upheap ((WT *)periodics, periodiccnt - 1); 2991 ANHE_at_cache (periodics [ev_active (w)]);
2992 upheap (periodics, ev_active (w));
1399 2993
2994 EV_FREQUENT_CHECK;
2995
1400 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2996 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1401} 2997}
1402 2998
1403void 2999void noinline
1404ev_periodic_stop (EV_P_ struct ev_periodic *w) 3000ev_periodic_stop (EV_P_ ev_periodic *w)
1405{ 3001{
1406 ev_clear_pending (EV_A_ (W)w); 3002 clear_pending (EV_A_ (W)w);
1407 if (!ev_is_active (w)) 3003 if (expect_false (!ev_is_active (w)))
1408 return; 3004 return;
1409 3005
3006 EV_FREQUENT_CHECK;
3007
3008 {
3009 int active = ev_active (w);
3010
1410 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3011 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1411 3012
1412 if (((W)w)->active < periodiccnt--) 3013 --periodiccnt;
3014
3015 if (expect_true (active < periodiccnt + HEAP0))
1413 { 3016 {
1414 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 3017 periodics [active] = periodics [periodiccnt + HEAP0];
1415 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 3018 adjustheap (periodics, periodiccnt, active);
1416 } 3019 }
3020 }
1417 3021
1418 ev_stop (EV_A_ (W)w); 3022 ev_stop (EV_A_ (W)w);
1419}
1420 3023
1421void 3024 EV_FREQUENT_CHECK;
3025}
3026
3027void noinline
1422ev_periodic_again (EV_P_ struct ev_periodic *w) 3028ev_periodic_again (EV_P_ ev_periodic *w)
1423{ 3029{
1424 /* TODO: use adjustheap and recalculation */ 3030 /* TODO: use adjustheap and recalculation */
1425 ev_periodic_stop (EV_A_ w); 3031 ev_periodic_stop (EV_A_ w);
1426 ev_periodic_start (EV_A_ w); 3032 ev_periodic_start (EV_A_ w);
1427} 3033}
1428#endif 3034#endif
1429 3035
1430void
1431ev_idle_start (EV_P_ struct ev_idle *w)
1432{
1433 if (ev_is_active (w))
1434 return;
1435
1436 ev_start (EV_A_ (W)w, ++idlecnt);
1437 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1438 idles [idlecnt - 1] = w;
1439}
1440
1441void
1442ev_idle_stop (EV_P_ struct ev_idle *w)
1443{
1444 ev_clear_pending (EV_A_ (W)w);
1445 if (ev_is_active (w))
1446 return;
1447
1448 idles [((W)w)->active - 1] = idles [--idlecnt];
1449 ev_stop (EV_A_ (W)w);
1450}
1451
1452void
1453ev_prepare_start (EV_P_ struct ev_prepare *w)
1454{
1455 if (ev_is_active (w))
1456 return;
1457
1458 ev_start (EV_A_ (W)w, ++preparecnt);
1459 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1460 prepares [preparecnt - 1] = w;
1461}
1462
1463void
1464ev_prepare_stop (EV_P_ struct ev_prepare *w)
1465{
1466 ev_clear_pending (EV_A_ (W)w);
1467 if (ev_is_active (w))
1468 return;
1469
1470 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1471 ev_stop (EV_A_ (W)w);
1472}
1473
1474void
1475ev_check_start (EV_P_ struct ev_check *w)
1476{
1477 if (ev_is_active (w))
1478 return;
1479
1480 ev_start (EV_A_ (W)w, ++checkcnt);
1481 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1482 checks [checkcnt - 1] = w;
1483}
1484
1485void
1486ev_check_stop (EV_P_ struct ev_check *w)
1487{
1488 ev_clear_pending (EV_A_ (W)w);
1489 if (!ev_is_active (w))
1490 return;
1491
1492 checks [((W)w)->active - 1] = checks [--checkcnt];
1493 ev_stop (EV_A_ (W)w);
1494}
1495
1496#ifndef SA_RESTART 3036#ifndef SA_RESTART
1497# define SA_RESTART 0 3037# define SA_RESTART 0
1498#endif 3038#endif
1499 3039
3040#if EV_SIGNAL_ENABLE
3041
3042void noinline
3043ev_signal_start (EV_P_ ev_signal *w)
3044{
3045 if (expect_false (ev_is_active (w)))
3046 return;
3047
3048 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3049
3050#if EV_MULTIPLICITY
3051 assert (("libev: a signal must not be attached to two different loops",
3052 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3053
3054 signals [w->signum - 1].loop = EV_A;
3055#endif
3056
3057 EV_FREQUENT_CHECK;
3058
3059#if EV_USE_SIGNALFD
3060 if (sigfd == -2)
3061 {
3062 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3063 if (sigfd < 0 && errno == EINVAL)
3064 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3065
3066 if (sigfd >= 0)
3067 {
3068 fd_intern (sigfd); /* doing it twice will not hurt */
3069
3070 sigemptyset (&sigfd_set);
3071
3072 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3073 ev_set_priority (&sigfd_w, EV_MAXPRI);
3074 ev_io_start (EV_A_ &sigfd_w);
3075 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3076 }
3077 }
3078
3079 if (sigfd >= 0)
3080 {
3081 /* TODO: check .head */
3082 sigaddset (&sigfd_set, w->signum);
3083 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3084
3085 signalfd (sigfd, &sigfd_set, 0);
3086 }
3087#endif
3088
3089 ev_start (EV_A_ (W)w, 1);
3090 wlist_add (&signals [w->signum - 1].head, (WL)w);
3091
3092 if (!((WL)w)->next)
3093# if EV_USE_SIGNALFD
3094 if (sigfd < 0) /*TODO*/
3095# endif
3096 {
3097# ifdef _WIN32
3098 evpipe_init (EV_A);
3099
3100 signal (w->signum, ev_sighandler);
3101# else
3102 struct sigaction sa;
3103
3104 evpipe_init (EV_A);
3105
3106 sa.sa_handler = ev_sighandler;
3107 sigfillset (&sa.sa_mask);
3108 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3109 sigaction (w->signum, &sa, 0);
3110
3111 if (origflags & EVFLAG_NOSIGMASK)
3112 {
3113 sigemptyset (&sa.sa_mask);
3114 sigaddset (&sa.sa_mask, w->signum);
3115 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3116 }
3117#endif
3118 }
3119
3120 EV_FREQUENT_CHECK;
3121}
3122
3123void noinline
3124ev_signal_stop (EV_P_ ev_signal *w)
3125{
3126 clear_pending (EV_A_ (W)w);
3127 if (expect_false (!ev_is_active (w)))
3128 return;
3129
3130 EV_FREQUENT_CHECK;
3131
3132 wlist_del (&signals [w->signum - 1].head, (WL)w);
3133 ev_stop (EV_A_ (W)w);
3134
3135 if (!signals [w->signum - 1].head)
3136 {
3137#if EV_MULTIPLICITY
3138 signals [w->signum - 1].loop = 0; /* unattach from signal */
3139#endif
3140#if EV_USE_SIGNALFD
3141 if (sigfd >= 0)
3142 {
3143 sigset_t ss;
3144
3145 sigemptyset (&ss);
3146 sigaddset (&ss, w->signum);
3147 sigdelset (&sigfd_set, w->signum);
3148
3149 signalfd (sigfd, &sigfd_set, 0);
3150 sigprocmask (SIG_UNBLOCK, &ss, 0);
3151 }
3152 else
3153#endif
3154 signal (w->signum, SIG_DFL);
3155 }
3156
3157 EV_FREQUENT_CHECK;
3158}
3159
3160#endif
3161
3162#if EV_CHILD_ENABLE
3163
1500void 3164void
1501ev_signal_start (EV_P_ struct ev_signal *w) 3165ev_child_start (EV_P_ ev_child *w)
1502{ 3166{
1503#if EV_MULTIPLICITY 3167#if EV_MULTIPLICITY
1504 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 3168 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1505#endif 3169#endif
1506 if (ev_is_active (w)) 3170 if (expect_false (ev_is_active (w)))
1507 return; 3171 return;
1508 3172
1509 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3173 EV_FREQUENT_CHECK;
1510 3174
1511 ev_start (EV_A_ (W)w, 1); 3175 ev_start (EV_A_ (W)w, 1);
1512 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3176 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1513 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1514 3177
1515 if (!((WL)w)->next) 3178 EV_FREQUENT_CHECK;
3179}
3180
3181void
3182ev_child_stop (EV_P_ ev_child *w)
3183{
3184 clear_pending (EV_A_ (W)w);
3185 if (expect_false (!ev_is_active (w)))
3186 return;
3187
3188 EV_FREQUENT_CHECK;
3189
3190 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3191 ev_stop (EV_A_ (W)w);
3192
3193 EV_FREQUENT_CHECK;
3194}
3195
3196#endif
3197
3198#if EV_STAT_ENABLE
3199
3200# ifdef _WIN32
3201# undef lstat
3202# define lstat(a,b) _stati64 (a,b)
3203# endif
3204
3205#define DEF_STAT_INTERVAL 5.0074891
3206#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3207#define MIN_STAT_INTERVAL 0.1074891
3208
3209static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3210
3211#if EV_USE_INOTIFY
3212
3213/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3214# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3215
3216static void noinline
3217infy_add (EV_P_ ev_stat *w)
3218{
3219 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
3220
3221 if (w->wd >= 0)
3222 {
3223 struct statfs sfs;
3224
3225 /* now local changes will be tracked by inotify, but remote changes won't */
3226 /* unless the filesystem is known to be local, we therefore still poll */
3227 /* also do poll on <2.6.25, but with normal frequency */
3228
3229 if (!fs_2625)
3230 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3231 else if (!statfs (w->path, &sfs)
3232 && (sfs.f_type == 0x1373 /* devfs */
3233 || sfs.f_type == 0xEF53 /* ext2/3 */
3234 || sfs.f_type == 0x3153464a /* jfs */
3235 || sfs.f_type == 0x52654973 /* reiser3 */
3236 || sfs.f_type == 0x01021994 /* tempfs */
3237 || sfs.f_type == 0x58465342 /* xfs */))
3238 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3239 else
3240 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1516 { 3241 }
1517#if WIN32 3242 else
1518 signal (w->signum, sighandler); 3243 {
3244 /* can't use inotify, continue to stat */
3245 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3246
3247 /* if path is not there, monitor some parent directory for speedup hints */
3248 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3249 /* but an efficiency issue only */
3250 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3251 {
3252 char path [4096];
3253 strcpy (path, w->path);
3254
3255 do
3256 {
3257 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3258 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3259
3260 char *pend = strrchr (path, '/');
3261
3262 if (!pend || pend == path)
3263 break;
3264
3265 *pend = 0;
3266 w->wd = inotify_add_watch (fs_fd, path, mask);
3267 }
3268 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3269 }
3270 }
3271
3272 if (w->wd >= 0)
3273 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3274
3275 /* now re-arm timer, if required */
3276 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3277 ev_timer_again (EV_A_ &w->timer);
3278 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3279}
3280
3281static void noinline
3282infy_del (EV_P_ ev_stat *w)
3283{
3284 int slot;
3285 int wd = w->wd;
3286
3287 if (wd < 0)
3288 return;
3289
3290 w->wd = -2;
3291 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3292 wlist_del (&fs_hash [slot].head, (WL)w);
3293
3294 /* remove this watcher, if others are watching it, they will rearm */
3295 inotify_rm_watch (fs_fd, wd);
3296}
3297
3298static void noinline
3299infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3300{
3301 if (slot < 0)
3302 /* overflow, need to check for all hash slots */
3303 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3304 infy_wd (EV_A_ slot, wd, ev);
3305 else
3306 {
3307 WL w_;
3308
3309 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3310 {
3311 ev_stat *w = (ev_stat *)w_;
3312 w_ = w_->next; /* lets us remove this watcher and all before it */
3313
3314 if (w->wd == wd || wd == -1)
3315 {
3316 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3317 {
3318 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3319 w->wd = -1;
3320 infy_add (EV_A_ w); /* re-add, no matter what */
3321 }
3322
3323 stat_timer_cb (EV_A_ &w->timer, 0);
3324 }
3325 }
3326 }
3327}
3328
3329static void
3330infy_cb (EV_P_ ev_io *w, int revents)
3331{
3332 char buf [EV_INOTIFY_BUFSIZE];
3333 int ofs;
3334 int len = read (fs_fd, buf, sizeof (buf));
3335
3336 for (ofs = 0; ofs < len; )
3337 {
3338 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3339 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3340 ofs += sizeof (struct inotify_event) + ev->len;
3341 }
3342}
3343
3344inline_size void ecb_cold
3345ev_check_2625 (EV_P)
3346{
3347 /* kernels < 2.6.25 are borked
3348 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3349 */
3350 if (ev_linux_version () < 0x020619)
3351 return;
3352
3353 fs_2625 = 1;
3354}
3355
3356inline_size int
3357infy_newfd (void)
3358{
3359#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3360 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3361 if (fd >= 0)
3362 return fd;
3363#endif
3364 return inotify_init ();
3365}
3366
3367inline_size void
3368infy_init (EV_P)
3369{
3370 if (fs_fd != -2)
3371 return;
3372
3373 fs_fd = -1;
3374
3375 ev_check_2625 (EV_A);
3376
3377 fs_fd = infy_newfd ();
3378
3379 if (fs_fd >= 0)
3380 {
3381 fd_intern (fs_fd);
3382 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3383 ev_set_priority (&fs_w, EV_MAXPRI);
3384 ev_io_start (EV_A_ &fs_w);
3385 ev_unref (EV_A);
3386 }
3387}
3388
3389inline_size void
3390infy_fork (EV_P)
3391{
3392 int slot;
3393
3394 if (fs_fd < 0)
3395 return;
3396
3397 ev_ref (EV_A);
3398 ev_io_stop (EV_A_ &fs_w);
3399 close (fs_fd);
3400 fs_fd = infy_newfd ();
3401
3402 if (fs_fd >= 0)
3403 {
3404 fd_intern (fs_fd);
3405 ev_io_set (&fs_w, fs_fd, EV_READ);
3406 ev_io_start (EV_A_ &fs_w);
3407 ev_unref (EV_A);
3408 }
3409
3410 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3411 {
3412 WL w_ = fs_hash [slot].head;
3413 fs_hash [slot].head = 0;
3414
3415 while (w_)
3416 {
3417 ev_stat *w = (ev_stat *)w_;
3418 w_ = w_->next; /* lets us add this watcher */
3419
3420 w->wd = -1;
3421
3422 if (fs_fd >= 0)
3423 infy_add (EV_A_ w); /* re-add, no matter what */
3424 else
3425 {
3426 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3427 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3428 ev_timer_again (EV_A_ &w->timer);
3429 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3430 }
3431 }
3432 }
3433}
3434
3435#endif
3436
3437#ifdef _WIN32
3438# define EV_LSTAT(p,b) _stati64 (p, b)
1519#else 3439#else
1520 struct sigaction sa; 3440# define EV_LSTAT(p,b) lstat (p, b)
1521 sa.sa_handler = sighandler;
1522 sigfillset (&sa.sa_mask);
1523 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1524 sigaction (w->signum, &sa, 0);
1525#endif 3441#endif
1526 }
1527}
1528 3442
1529void 3443void
1530ev_signal_stop (EV_P_ struct ev_signal *w) 3444ev_stat_stat (EV_P_ ev_stat *w)
1531{ 3445{
1532 ev_clear_pending (EV_A_ (W)w); 3446 if (lstat (w->path, &w->attr) < 0)
1533 if (!ev_is_active (w)) 3447 w->attr.st_nlink = 0;
3448 else if (!w->attr.st_nlink)
3449 w->attr.st_nlink = 1;
3450}
3451
3452static void noinline
3453stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3454{
3455 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3456
3457 ev_statdata prev = w->attr;
3458 ev_stat_stat (EV_A_ w);
3459
3460 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3461 if (
3462 prev.st_dev != w->attr.st_dev
3463 || prev.st_ino != w->attr.st_ino
3464 || prev.st_mode != w->attr.st_mode
3465 || prev.st_nlink != w->attr.st_nlink
3466 || prev.st_uid != w->attr.st_uid
3467 || prev.st_gid != w->attr.st_gid
3468 || prev.st_rdev != w->attr.st_rdev
3469 || prev.st_size != w->attr.st_size
3470 || prev.st_atime != w->attr.st_atime
3471 || prev.st_mtime != w->attr.st_mtime
3472 || prev.st_ctime != w->attr.st_ctime
3473 ) {
3474 /* we only update w->prev on actual differences */
3475 /* in case we test more often than invoke the callback, */
3476 /* to ensure that prev is always different to attr */
3477 w->prev = prev;
3478
3479 #if EV_USE_INOTIFY
3480 if (fs_fd >= 0)
3481 {
3482 infy_del (EV_A_ w);
3483 infy_add (EV_A_ w);
3484 ev_stat_stat (EV_A_ w); /* avoid race... */
3485 }
3486 #endif
3487
3488 ev_feed_event (EV_A_ w, EV_STAT);
3489 }
3490}
3491
3492void
3493ev_stat_start (EV_P_ ev_stat *w)
3494{
3495 if (expect_false (ev_is_active (w)))
1534 return; 3496 return;
1535 3497
1536 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3498 ev_stat_stat (EV_A_ w);
3499
3500 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3501 w->interval = MIN_STAT_INTERVAL;
3502
3503 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3504 ev_set_priority (&w->timer, ev_priority (w));
3505
3506#if EV_USE_INOTIFY
3507 infy_init (EV_A);
3508
3509 if (fs_fd >= 0)
3510 infy_add (EV_A_ w);
3511 else
3512#endif
3513 {
3514 ev_timer_again (EV_A_ &w->timer);
3515 ev_unref (EV_A);
3516 }
3517
3518 ev_start (EV_A_ (W)w, 1);
3519
3520 EV_FREQUENT_CHECK;
3521}
3522
3523void
3524ev_stat_stop (EV_P_ ev_stat *w)
3525{
3526 clear_pending (EV_A_ (W)w);
3527 if (expect_false (!ev_is_active (w)))
3528 return;
3529
3530 EV_FREQUENT_CHECK;
3531
3532#if EV_USE_INOTIFY
3533 infy_del (EV_A_ w);
3534#endif
3535
3536 if (ev_is_active (&w->timer))
3537 {
3538 ev_ref (EV_A);
3539 ev_timer_stop (EV_A_ &w->timer);
3540 }
3541
1537 ev_stop (EV_A_ (W)w); 3542 ev_stop (EV_A_ (W)w);
1538 3543
1539 if (!signals [w->signum - 1].head) 3544 EV_FREQUENT_CHECK;
1540 signal (w->signum, SIG_DFL);
1541} 3545}
3546#endif
1542 3547
3548#if EV_IDLE_ENABLE
1543void 3549void
1544ev_child_start (EV_P_ struct ev_child *w) 3550ev_idle_start (EV_P_ ev_idle *w)
1545{ 3551{
1546#if EV_MULTIPLICITY
1547 assert (("child watchers are only supported in the default loop", loop == default_loop));
1548#endif
1549 if (ev_is_active (w)) 3552 if (expect_false (ev_is_active (w)))
1550 return; 3553 return;
1551 3554
3555 pri_adjust (EV_A_ (W)w);
3556
3557 EV_FREQUENT_CHECK;
3558
3559 {
3560 int active = ++idlecnt [ABSPRI (w)];
3561
3562 ++idleall;
3563 ev_start (EV_A_ (W)w, active);
3564
3565 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3566 idles [ABSPRI (w)][active - 1] = w;
3567 }
3568
3569 EV_FREQUENT_CHECK;
3570}
3571
3572void
3573ev_idle_stop (EV_P_ ev_idle *w)
3574{
3575 clear_pending (EV_A_ (W)w);
3576 if (expect_false (!ev_is_active (w)))
3577 return;
3578
3579 EV_FREQUENT_CHECK;
3580
3581 {
3582 int active = ev_active (w);
3583
3584 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3585 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3586
3587 ev_stop (EV_A_ (W)w);
3588 --idleall;
3589 }
3590
3591 EV_FREQUENT_CHECK;
3592}
3593#endif
3594
3595#if EV_PREPARE_ENABLE
3596void
3597ev_prepare_start (EV_P_ ev_prepare *w)
3598{
3599 if (expect_false (ev_is_active (w)))
3600 return;
3601
3602 EV_FREQUENT_CHECK;
3603
3604 ev_start (EV_A_ (W)w, ++preparecnt);
3605 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3606 prepares [preparecnt - 1] = w;
3607
3608 EV_FREQUENT_CHECK;
3609}
3610
3611void
3612ev_prepare_stop (EV_P_ ev_prepare *w)
3613{
3614 clear_pending (EV_A_ (W)w);
3615 if (expect_false (!ev_is_active (w)))
3616 return;
3617
3618 EV_FREQUENT_CHECK;
3619
3620 {
3621 int active = ev_active (w);
3622
3623 prepares [active - 1] = prepares [--preparecnt];
3624 ev_active (prepares [active - 1]) = active;
3625 }
3626
3627 ev_stop (EV_A_ (W)w);
3628
3629 EV_FREQUENT_CHECK;
3630}
3631#endif
3632
3633#if EV_CHECK_ENABLE
3634void
3635ev_check_start (EV_P_ ev_check *w)
3636{
3637 if (expect_false (ev_is_active (w)))
3638 return;
3639
3640 EV_FREQUENT_CHECK;
3641
3642 ev_start (EV_A_ (W)w, ++checkcnt);
3643 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3644 checks [checkcnt - 1] = w;
3645
3646 EV_FREQUENT_CHECK;
3647}
3648
3649void
3650ev_check_stop (EV_P_ ev_check *w)
3651{
3652 clear_pending (EV_A_ (W)w);
3653 if (expect_false (!ev_is_active (w)))
3654 return;
3655
3656 EV_FREQUENT_CHECK;
3657
3658 {
3659 int active = ev_active (w);
3660
3661 checks [active - 1] = checks [--checkcnt];
3662 ev_active (checks [active - 1]) = active;
3663 }
3664
3665 ev_stop (EV_A_ (W)w);
3666
3667 EV_FREQUENT_CHECK;
3668}
3669#endif
3670
3671#if EV_EMBED_ENABLE
3672void noinline
3673ev_embed_sweep (EV_P_ ev_embed *w)
3674{
3675 ev_run (w->other, EVRUN_NOWAIT);
3676}
3677
3678static void
3679embed_io_cb (EV_P_ ev_io *io, int revents)
3680{
3681 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3682
3683 if (ev_cb (w))
3684 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3685 else
3686 ev_run (w->other, EVRUN_NOWAIT);
3687}
3688
3689static void
3690embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3691{
3692 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3693
3694 {
3695 EV_P = w->other;
3696
3697 while (fdchangecnt)
3698 {
3699 fd_reify (EV_A);
3700 ev_run (EV_A_ EVRUN_NOWAIT);
3701 }
3702 }
3703}
3704
3705static void
3706embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3707{
3708 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3709
3710 ev_embed_stop (EV_A_ w);
3711
3712 {
3713 EV_P = w->other;
3714
3715 ev_loop_fork (EV_A);
3716 ev_run (EV_A_ EVRUN_NOWAIT);
3717 }
3718
3719 ev_embed_start (EV_A_ w);
3720}
3721
3722#if 0
3723static void
3724embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3725{
3726 ev_idle_stop (EV_A_ idle);
3727}
3728#endif
3729
3730void
3731ev_embed_start (EV_P_ ev_embed *w)
3732{
3733 if (expect_false (ev_is_active (w)))
3734 return;
3735
3736 {
3737 EV_P = w->other;
3738 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3739 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3740 }
3741
3742 EV_FREQUENT_CHECK;
3743
3744 ev_set_priority (&w->io, ev_priority (w));
3745 ev_io_start (EV_A_ &w->io);
3746
3747 ev_prepare_init (&w->prepare, embed_prepare_cb);
3748 ev_set_priority (&w->prepare, EV_MINPRI);
3749 ev_prepare_start (EV_A_ &w->prepare);
3750
3751 ev_fork_init (&w->fork, embed_fork_cb);
3752 ev_fork_start (EV_A_ &w->fork);
3753
3754 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3755
1552 ev_start (EV_A_ (W)w, 1); 3756 ev_start (EV_A_ (W)w, 1);
1553 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3757
3758 EV_FREQUENT_CHECK;
1554} 3759}
1555 3760
1556void 3761void
1557ev_child_stop (EV_P_ struct ev_child *w) 3762ev_embed_stop (EV_P_ ev_embed *w)
1558{ 3763{
1559 ev_clear_pending (EV_A_ (W)w); 3764 clear_pending (EV_A_ (W)w);
1560 if (!ev_is_active (w)) 3765 if (expect_false (!ev_is_active (w)))
1561 return; 3766 return;
1562 3767
1563 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3768 EV_FREQUENT_CHECK;
3769
3770 ev_io_stop (EV_A_ &w->io);
3771 ev_prepare_stop (EV_A_ &w->prepare);
3772 ev_fork_stop (EV_A_ &w->fork);
3773
1564 ev_stop (EV_A_ (W)w); 3774 ev_stop (EV_A_ (W)w);
3775
3776 EV_FREQUENT_CHECK;
1565} 3777}
3778#endif
3779
3780#if EV_FORK_ENABLE
3781void
3782ev_fork_start (EV_P_ ev_fork *w)
3783{
3784 if (expect_false (ev_is_active (w)))
3785 return;
3786
3787 EV_FREQUENT_CHECK;
3788
3789 ev_start (EV_A_ (W)w, ++forkcnt);
3790 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3791 forks [forkcnt - 1] = w;
3792
3793 EV_FREQUENT_CHECK;
3794}
3795
3796void
3797ev_fork_stop (EV_P_ ev_fork *w)
3798{
3799 clear_pending (EV_A_ (W)w);
3800 if (expect_false (!ev_is_active (w)))
3801 return;
3802
3803 EV_FREQUENT_CHECK;
3804
3805 {
3806 int active = ev_active (w);
3807
3808 forks [active - 1] = forks [--forkcnt];
3809 ev_active (forks [active - 1]) = active;
3810 }
3811
3812 ev_stop (EV_A_ (W)w);
3813
3814 EV_FREQUENT_CHECK;
3815}
3816#endif
3817
3818#if EV_CLEANUP_ENABLE
3819void
3820ev_cleanup_start (EV_P_ ev_cleanup *w)
3821{
3822 if (expect_false (ev_is_active (w)))
3823 return;
3824
3825 EV_FREQUENT_CHECK;
3826
3827 ev_start (EV_A_ (W)w, ++cleanupcnt);
3828 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3829 cleanups [cleanupcnt - 1] = w;
3830
3831 /* cleanup watchers should never keep a refcount on the loop */
3832 ev_unref (EV_A);
3833 EV_FREQUENT_CHECK;
3834}
3835
3836void
3837ev_cleanup_stop (EV_P_ ev_cleanup *w)
3838{
3839 clear_pending (EV_A_ (W)w);
3840 if (expect_false (!ev_is_active (w)))
3841 return;
3842
3843 EV_FREQUENT_CHECK;
3844 ev_ref (EV_A);
3845
3846 {
3847 int active = ev_active (w);
3848
3849 cleanups [active - 1] = cleanups [--cleanupcnt];
3850 ev_active (cleanups [active - 1]) = active;
3851 }
3852
3853 ev_stop (EV_A_ (W)w);
3854
3855 EV_FREQUENT_CHECK;
3856}
3857#endif
3858
3859#if EV_ASYNC_ENABLE
3860void
3861ev_async_start (EV_P_ ev_async *w)
3862{
3863 if (expect_false (ev_is_active (w)))
3864 return;
3865
3866 w->sent = 0;
3867
3868 evpipe_init (EV_A);
3869
3870 EV_FREQUENT_CHECK;
3871
3872 ev_start (EV_A_ (W)w, ++asynccnt);
3873 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3874 asyncs [asynccnt - 1] = w;
3875
3876 EV_FREQUENT_CHECK;
3877}
3878
3879void
3880ev_async_stop (EV_P_ ev_async *w)
3881{
3882 clear_pending (EV_A_ (W)w);
3883 if (expect_false (!ev_is_active (w)))
3884 return;
3885
3886 EV_FREQUENT_CHECK;
3887
3888 {
3889 int active = ev_active (w);
3890
3891 asyncs [active - 1] = asyncs [--asynccnt];
3892 ev_active (asyncs [active - 1]) = active;
3893 }
3894
3895 ev_stop (EV_A_ (W)w);
3896
3897 EV_FREQUENT_CHECK;
3898}
3899
3900void
3901ev_async_send (EV_P_ ev_async *w)
3902{
3903 w->sent = 1;
3904 evpipe_write (EV_A_ &async_pending);
3905}
3906#endif
1566 3907
1567/*****************************************************************************/ 3908/*****************************************************************************/
1568 3909
1569struct ev_once 3910struct ev_once
1570{ 3911{
1571 struct ev_io io; 3912 ev_io io;
1572 struct ev_timer to; 3913 ev_timer to;
1573 void (*cb)(int revents, void *arg); 3914 void (*cb)(int revents, void *arg);
1574 void *arg; 3915 void *arg;
1575}; 3916};
1576 3917
1577static void 3918static void
1578once_cb (EV_P_ struct ev_once *once, int revents) 3919once_cb (EV_P_ struct ev_once *once, int revents)
1579{ 3920{
1580 void (*cb)(int revents, void *arg) = once->cb; 3921 void (*cb)(int revents, void *arg) = once->cb;
1581 void *arg = once->arg; 3922 void *arg = once->arg;
1582 3923
1583 ev_io_stop (EV_A_ &once->io); 3924 ev_io_stop (EV_A_ &once->io);
1584 ev_timer_stop (EV_A_ &once->to); 3925 ev_timer_stop (EV_A_ &once->to);
1585 ev_free (once); 3926 ev_free (once);
1586 3927
1587 cb (revents, arg); 3928 cb (revents, arg);
1588} 3929}
1589 3930
1590static void 3931static void
1591once_cb_io (EV_P_ struct ev_io *w, int revents) 3932once_cb_io (EV_P_ ev_io *w, int revents)
1592{ 3933{
1593 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3934 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3935
3936 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1594} 3937}
1595 3938
1596static void 3939static void
1597once_cb_to (EV_P_ struct ev_timer *w, int revents) 3940once_cb_to (EV_P_ ev_timer *w, int revents)
1598{ 3941{
1599 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3942 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3943
3944 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1600} 3945}
1601 3946
1602void 3947void
1603ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3948ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1604{ 3949{
1605 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3950 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1606 3951
1607 if (!once) 3952 if (expect_false (!once))
3953 {
1608 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3954 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1609 else 3955 return;
1610 { 3956 }
3957
1611 once->cb = cb; 3958 once->cb = cb;
1612 once->arg = arg; 3959 once->arg = arg;
1613 3960
1614 ev_init (&once->io, once_cb_io); 3961 ev_init (&once->io, once_cb_io);
1615 if (fd >= 0) 3962 if (fd >= 0)
3963 {
3964 ev_io_set (&once->io, fd, events);
3965 ev_io_start (EV_A_ &once->io);
3966 }
3967
3968 ev_init (&once->to, once_cb_to);
3969 if (timeout >= 0.)
3970 {
3971 ev_timer_set (&once->to, timeout, 0.);
3972 ev_timer_start (EV_A_ &once->to);
3973 }
3974}
3975
3976/*****************************************************************************/
3977
3978#if EV_WALK_ENABLE
3979void ecb_cold
3980ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3981{
3982 int i, j;
3983 ev_watcher_list *wl, *wn;
3984
3985 if (types & (EV_IO | EV_EMBED))
3986 for (i = 0; i < anfdmax; ++i)
3987 for (wl = anfds [i].head; wl; )
1616 { 3988 {
1617 ev_io_set (&once->io, fd, events); 3989 wn = wl->next;
1618 ev_io_start (EV_A_ &once->io); 3990
3991#if EV_EMBED_ENABLE
3992 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3993 {
3994 if (types & EV_EMBED)
3995 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3996 }
3997 else
3998#endif
3999#if EV_USE_INOTIFY
4000 if (ev_cb ((ev_io *)wl) == infy_cb)
4001 ;
4002 else
4003#endif
4004 if ((ev_io *)wl != &pipe_w)
4005 if (types & EV_IO)
4006 cb (EV_A_ EV_IO, wl);
4007
4008 wl = wn;
1619 } 4009 }
1620 4010
1621 ev_init (&once->to, once_cb_to); 4011 if (types & (EV_TIMER | EV_STAT))
1622 if (timeout >= 0.) 4012 for (i = timercnt + HEAP0; i-- > HEAP0; )
4013#if EV_STAT_ENABLE
4014 /*TODO: timer is not always active*/
4015 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1623 { 4016 {
1624 ev_timer_set (&once->to, timeout, 0.); 4017 if (types & EV_STAT)
1625 ev_timer_start (EV_A_ &once->to); 4018 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1626 } 4019 }
1627 } 4020 else
1628} 4021#endif
4022 if (types & EV_TIMER)
4023 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1629 4024
1630#ifdef __cplusplus 4025#if EV_PERIODIC_ENABLE
1631} 4026 if (types & EV_PERIODIC)
4027 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4028 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4029#endif
4030
4031#if EV_IDLE_ENABLE
4032 if (types & EV_IDLE)
4033 for (j = NUMPRI; i--; )
4034 for (i = idlecnt [j]; i--; )
4035 cb (EV_A_ EV_IDLE, idles [j][i]);
4036#endif
4037
4038#if EV_FORK_ENABLE
4039 if (types & EV_FORK)
4040 for (i = forkcnt; i--; )
4041 if (ev_cb (forks [i]) != embed_fork_cb)
4042 cb (EV_A_ EV_FORK, forks [i]);
4043#endif
4044
4045#if EV_ASYNC_ENABLE
4046 if (types & EV_ASYNC)
4047 for (i = asynccnt; i--; )
4048 cb (EV_A_ EV_ASYNC, asyncs [i]);
4049#endif
4050
4051#if EV_PREPARE_ENABLE
4052 if (types & EV_PREPARE)
4053 for (i = preparecnt; i--; )
4054# if EV_EMBED_ENABLE
4055 if (ev_cb (prepares [i]) != embed_prepare_cb)
1632#endif 4056# endif
4057 cb (EV_A_ EV_PREPARE, prepares [i]);
4058#endif
1633 4059
4060#if EV_CHECK_ENABLE
4061 if (types & EV_CHECK)
4062 for (i = checkcnt; i--; )
4063 cb (EV_A_ EV_CHECK, checks [i]);
4064#endif
4065
4066#if EV_SIGNAL_ENABLE
4067 if (types & EV_SIGNAL)
4068 for (i = 0; i < EV_NSIG - 1; ++i)
4069 for (wl = signals [i].head; wl; )
4070 {
4071 wn = wl->next;
4072 cb (EV_A_ EV_SIGNAL, wl);
4073 wl = wn;
4074 }
4075#endif
4076
4077#if EV_CHILD_ENABLE
4078 if (types & EV_CHILD)
4079 for (i = (EV_PID_HASHSIZE); i--; )
4080 for (wl = childs [i]; wl; )
4081 {
4082 wn = wl->next;
4083 cb (EV_A_ EV_CHILD, wl);
4084 wl = wn;
4085 }
4086#endif
4087/* EV_STAT 0x00001000 /* stat data changed */
4088/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4089}
4090#endif
4091
4092#if EV_MULTIPLICITY
4093 #include "ev_wrap.h"
4094#endif
4095
4096EV_CPP(})
4097

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