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Comparing libev/ev.c (file contents):
Revision 1.43 by root, Fri Nov 2 20:21:33 2007 UTC vs.
Revision 1.355 by root, Fri Oct 22 10:09:12 2010 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 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: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 45# include "config.h"
46# endif
47
48# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0
53# endif
54# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1
56# endif
57# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL)
59# define EV_USE_CLOCK_SYSCALL 0
60# endif
61
62# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC
64# define EV_USE_MONOTONIC 1
65# endif
66# ifndef EV_USE_REALTIME
67# define EV_USE_REALTIME 0
68# endif
69# else
70# ifndef EV_USE_MONOTONIC
71# define EV_USE_MONOTONIC 0
72# endif
73# ifndef EV_USE_REALTIME
74# define EV_USE_REALTIME 0
75# endif
76# endif
77
78# if HAVE_NANOSLEEP
79# ifndef EV_USE_NANOSLEEP
80# define EV_USE_NANOSLEEP EV_FEATURE_OS
81# endif
82# else
83# undef EV_USE_NANOSLEEP
84# define EV_USE_NANOSLEEP 0
85# endif
86
87# if HAVE_SELECT && HAVE_SYS_SELECT_H
88# ifndef EV_USE_SELECT
89# define EV_USE_SELECT EV_FEATURE_BACKENDS
90# endif
91# else
92# undef EV_USE_SELECT
93# define EV_USE_SELECT 0
94# endif
95
96# if HAVE_POLL && HAVE_POLL_H
97# ifndef EV_USE_POLL
98# define EV_USE_POLL EV_FEATURE_BACKENDS
99# endif
100# else
101# undef EV_USE_POLL
102# define EV_USE_POLL 0
103# endif
104
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# ifndef EV_USE_EPOLL
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif
109# else
110# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0
112# endif
113
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# endif
118# else
119# undef EV_USE_KQUEUE
120# define EV_USE_KQUEUE 0
121# endif
122
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# ifndef EV_USE_PORT
125# define EV_USE_PORT EV_FEATURE_BACKENDS
126# endif
127# else
128# undef EV_USE_PORT
129# define EV_USE_PORT 0
130# endif
131
132# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
133# ifndef EV_USE_INOTIFY
134# define EV_USE_INOTIFY EV_FEATURE_OS
135# endif
136# else
137# undef EV_USE_INOTIFY
138# define EV_USE_INOTIFY 0
139# endif
140
141# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
142# ifndef EV_USE_SIGNALFD
143# define EV_USE_SIGNALFD EV_FEATURE_OS
144# endif
145# else
146# undef EV_USE_SIGNALFD
147# define EV_USE_SIGNALFD 0
148# endif
149
150# if HAVE_EVENTFD
151# ifndef EV_USE_EVENTFD
152# define EV_USE_EVENTFD EV_FEATURE_OS
153# endif
154# else
155# undef EV_USE_EVENTFD
156# define EV_USE_EVENTFD 0
157# endif
158
33#endif 159#endif
34 160
35#include <math.h> 161#include <math.h>
36#include <stdlib.h> 162#include <stdlib.h>
37#include <unistd.h> 163#include <string.h>
38#include <fcntl.h> 164#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 165#include <stddef.h>
41 166
42#include <stdio.h> 167#include <stdio.h>
43 168
44#include <assert.h> 169#include <assert.h>
45#include <errno.h> 170#include <errno.h>
46#include <sys/types.h> 171#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 172#include <time.h>
173#include <limits.h>
50 174
51/**/ 175#include <signal.h>
176
177#ifdef EV_H
178# include EV_H
179#else
180# include "ev.h"
181#endif
182
183EV_CPP(extern "C" {)
184
185#ifndef _WIN32
186# include <sys/time.h>
187# include <sys/wait.h>
188# include <unistd.h>
189#else
190# include <io.h>
191# define WIN32_LEAN_AND_MEAN
192# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1
195# endif
196# undef EV_AVOID_STDIO
197#endif
198
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */
208
209/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG)
211/* use what's provided */
212#elif defined (NSIG)
213# define EV_NSIG (NSIG)
214#elif defined(_NSIG)
215# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX)
217# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX)
219# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX)
221# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG)
223# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG)
225# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE)
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig)
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else
231# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */
234# define EV_NSIG 65
235#endif
236
237#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else
241# define EV_USE_CLOCK_SYSCALL 0
242# endif
243#endif
52 244
53#ifndef EV_USE_MONOTONIC 245#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else
54# define EV_USE_MONOTONIC 1 249# define EV_USE_MONOTONIC 0
250# endif
251#endif
252
253#ifndef EV_USE_REALTIME
254# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
255#endif
256
257#ifndef EV_USE_NANOSLEEP
258# if _POSIX_C_SOURCE >= 199309L
259# define EV_USE_NANOSLEEP EV_FEATURE_OS
260# else
261# define EV_USE_NANOSLEEP 0
262# endif
55#endif 263#endif
56 264
57#ifndef EV_USE_SELECT 265#ifndef EV_USE_SELECT
58# define EV_USE_SELECT 1 266# define EV_USE_SELECT EV_FEATURE_BACKENDS
59#endif 267#endif
60 268
61#ifndef EV_USE_POLL 269#ifndef EV_USE_POLL
62# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 270# ifdef _WIN32
271# define EV_USE_POLL 0
272# else
273# define EV_USE_POLL EV_FEATURE_BACKENDS
274# endif
63#endif 275#endif
64 276
65#ifndef EV_USE_EPOLL 277#ifndef EV_USE_EPOLL
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_EPOLL EV_FEATURE_BACKENDS
280# else
66# define EV_USE_EPOLL 0 281# define EV_USE_EPOLL 0
67#endif 282# endif
283#endif
68 284
285#ifndef EV_USE_KQUEUE
286# define EV_USE_KQUEUE 0
287#endif
288
69#ifndef EV_USE_REALTIME 289#ifndef EV_USE_PORT
70# define EV_USE_REALTIME 1 290# define EV_USE_PORT 0
291#endif
292
293#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS
296# else
297# define EV_USE_INOTIFY 0
71#endif 298# endif
299#endif
72 300
73/**/ 301#ifndef EV_PID_HASHSIZE
302# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
303#endif
304
305#ifndef EV_INOTIFY_HASHSIZE
306# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
307#endif
308
309#ifndef EV_USE_EVENTFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_EVENTFD EV_FEATURE_OS
312# else
313# define EV_USE_EVENTFD 0
314# endif
315#endif
316
317#ifndef EV_USE_SIGNALFD
318# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
319# define EV_USE_SIGNALFD EV_FEATURE_OS
320# else
321# define EV_USE_SIGNALFD 0
322# endif
323#endif
324
325#if 0 /* debugging */
326# define EV_VERIFY 3
327# define EV_USE_4HEAP 1
328# define EV_HEAP_CACHE_AT 1
329#endif
330
331#ifndef EV_VERIFY
332# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
333#endif
334
335#ifndef EV_USE_4HEAP
336# define EV_USE_4HEAP EV_FEATURE_DATA
337#endif
338
339#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif
342
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h>
347# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1
351# else
352# undef EV_USE_CLOCK_SYSCALL
353# define EV_USE_CLOCK_SYSCALL 0
354# endif
355#endif
356
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
74 364
75#ifndef CLOCK_MONOTONIC 365#ifndef CLOCK_MONOTONIC
76# undef EV_USE_MONOTONIC 366# undef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0 367# define EV_USE_MONOTONIC 0
78#endif 368#endif
… …
80#ifndef CLOCK_REALTIME 370#ifndef CLOCK_REALTIME
81# undef EV_USE_REALTIME 371# undef EV_USE_REALTIME
82# define EV_USE_REALTIME 0 372# define EV_USE_REALTIME 0
83#endif 373#endif
84 374
375#if !EV_STAT_ENABLE
376# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0
378#endif
379
380#if !EV_USE_NANOSLEEP
381# ifndef _WIN32
382# include <sys/select.h>
383# endif
384#endif
385
386#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h>
389# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0
394# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif
400
401#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h>
404# ifndef EFD_NONBLOCK
405# define EFD_NONBLOCK O_NONBLOCK
406# endif
407# ifndef EFD_CLOEXEC
408# ifdef O_CLOEXEC
409# define EFD_CLOEXEC O_CLOEXEC
410# else
411# define EFD_CLOEXEC 02000000
412# endif
413# endif
414EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
415#endif
416
417#if EV_USE_SIGNALFD
418/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
419# include <stdint.h>
420# ifndef SFD_NONBLOCK
421# define SFD_NONBLOCK O_NONBLOCK
422# endif
423# ifndef SFD_CLOEXEC
424# ifdef O_CLOEXEC
425# define SFD_CLOEXEC O_CLOEXEC
426# else
427# define SFD_CLOEXEC 02000000
428# endif
429# endif
430EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
431
432struct signalfd_siginfo
433{
434 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)];
436};
437#endif
438
85/**/ 439/**/
86 440
441#if EV_VERIFY >= 3
442# define EV_FREQUENT_CHECK ev_verify (EV_A)
443#else
444# define EV_FREQUENT_CHECK do { } while (0)
445#endif
446
447/*
448 * This is used to avoid floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
456
87#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
88#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
89#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
90/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
91 459
92#include "ev.h" 460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
93 462
94#if __GNUC__ >= 3 463#if __GNUC__ >= 4
95# define expect(expr,value) __builtin_expect ((expr),(value)) 464# define expect(expr,value) __builtin_expect ((expr),(value))
96# define inline inline 465# define noinline __attribute__ ((noinline))
97#else 466#else
98# define expect(expr,value) (expr) 467# define expect(expr,value) (expr)
99# define inline static 468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif
100#endif 472#endif
101 473
102#define expect_false(expr) expect ((expr) != 0, 0) 474#define expect_false(expr) expect ((expr) != 0, 0)
103#define expect_true(expr) expect ((expr) != 0, 1) 475#define expect_true(expr) expect ((expr) != 0, 1)
476#define inline_size static inline
104 477
478#if EV_FEATURE_CODE
479# define inline_speed static inline
480#else
481# define inline_speed static noinline
482#endif
483
105#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485
486#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0)
488#else
106#define ABSPRI(w) ((w)->priority - EV_MINPRI) 489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif
107 491
492#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494
108typedef struct ev_watcher *W; 495typedef ev_watcher *W;
109typedef struct ev_watcher_list *WL; 496typedef ev_watcher_list *WL;
110typedef struct ev_watcher_time *WT; 497typedef ev_watcher_time *WT;
111 498
112static ev_tstamp now_floor, now, diff; /* monotonic clock */ 499#define ev_active(w) ((W)(w))->active
113ev_tstamp ev_now; 500#define ev_at(w) ((WT)(w))->at
114int ev_method;
115 501
116static int have_monotonic; /* runtime */ 502#if EV_USE_REALTIME
503/* sig_atomic_t is used to avoid per-thread variables or locking but still */
504/* giving it a reasonably high chance of working on typical architectures */
505static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
506#endif
117 507
118static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 508#if EV_USE_MONOTONIC
119static void (*method_modify)(int fd, int oev, int nev); 509static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
120static void (*method_poll)(ev_tstamp timeout); 510#endif
511
512#ifndef EV_FD_TO_WIN32_HANDLE
513# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
514#endif
515#ifndef EV_WIN32_HANDLE_TO_FD
516# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
517#endif
518#ifndef EV_WIN32_CLOSE_FD
519# define EV_WIN32_CLOSE_FD(fd) close (fd)
520#endif
521
522#ifdef _WIN32
523# include "ev_win32.c"
524#endif
121 525
122/*****************************************************************************/ 526/*****************************************************************************/
123 527
528static unsigned int noinline
529ev_linux_version (void)
530{
531#ifdef __linux
532 struct utsname buf;
533 unsigned int v;
534 int i;
535 char *p = buf.release;
536
537 if (uname (&buf))
538 return 0;
539
540 for (i = 3+1; --i; )
541 {
542 unsigned int c = 0;
543
544 for (;;)
545 {
546 if (*p >= '0' && *p <= '9')
547 c = c * 10 + *p++ - '0';
548 else
549 {
550 p += *p == '.';
551 break;
552 }
553 }
554
555 v = (v << 8) | c;
556 }
557
558 return v;
559#else
560 return 0;
561#endif
562}
563
564/*****************************************************************************/
565
566#if EV_AVOID_STDIO
567static void noinline
568ev_printerr (const char *msg)
569{
570 write (STDERR_FILENO, msg, strlen (msg));
571}
572#endif
573
574static void (*syserr_cb)(const char *msg);
575
576void
577ev_set_syserr_cb (void (*cb)(const char *msg))
578{
579 syserr_cb = cb;
580}
581
582static void noinline
583ev_syserr (const char *msg)
584{
585 if (!msg)
586 msg = "(libev) system error";
587
588 if (syserr_cb)
589 syserr_cb (msg);
590 else
591 {
592#if EV_AVOID_STDIO
593 const char *err = strerror (errno);
594
595 ev_printerr (msg);
596 ev_printerr (": ");
597 ev_printerr (err);
598 ev_printerr ("\n");
599#else
600 perror (msg);
601#endif
602 abort ();
603 }
604}
605
606static void *
607ev_realloc_emul (void *ptr, long size)
608{
609#if __GLIBC__
610 return realloc (ptr, size);
611#else
612 /* some systems, notably openbsd and darwin, fail to properly
613 * implement realloc (x, 0) (as required by both ansi c-89 and
614 * the single unix specification, so work around them here.
615 */
616
617 if (size)
618 return realloc (ptr, size);
619
620 free (ptr);
621 return 0;
622#endif
623}
624
625static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
626
627void
628ev_set_allocator (void *(*cb)(void *ptr, long size))
629{
630 alloc = cb;
631}
632
633inline_speed void *
634ev_realloc (void *ptr, long size)
635{
636 ptr = alloc (ptr, size);
637
638 if (!ptr && size)
639 {
640#if EV_AVOID_STDIO
641 ev_printerr ("libev: memory allocation failed, aborting.\n");
642#else
643 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
644#endif
645 abort ();
646 }
647
648 return ptr;
649}
650
651#define ev_malloc(size) ev_realloc (0, (size))
652#define ev_free(ptr) ev_realloc ((ptr), 0)
653
654/*****************************************************************************/
655
656/* set in reify when reification needed */
657#define EV_ANFD_REIFY 1
658
659/* file descriptor info structure */
660typedef struct
661{
662 WL head;
663 unsigned char events; /* the events watched for */
664 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
665 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
666 unsigned char unused;
667#if EV_USE_EPOLL
668 unsigned int egen; /* generation counter to counter epoll bugs */
669#endif
670#if EV_SELECT_IS_WINSOCKET
671 SOCKET handle;
672#endif
673} ANFD;
674
675/* stores the pending event set for a given watcher */
676typedef struct
677{
678 W w;
679 int events; /* the pending event set for the given watcher */
680} ANPENDING;
681
682#if EV_USE_INOTIFY
683/* hash table entry per inotify-id */
684typedef struct
685{
686 WL head;
687} ANFS;
688#endif
689
690/* Heap Entry */
691#if EV_HEAP_CACHE_AT
692 /* a heap element */
693 typedef struct {
694 ev_tstamp at;
695 WT w;
696 } ANHE;
697
698 #define ANHE_w(he) (he).w /* access watcher, read-write */
699 #define ANHE_at(he) (he).at /* access cached at, read-only */
700 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
701#else
702 /* a heap element */
703 typedef WT ANHE;
704
705 #define ANHE_w(he) (he)
706 #define ANHE_at(he) (he)->at
707 #define ANHE_at_cache(he)
708#endif
709
710#if EV_MULTIPLICITY
711
712 struct ev_loop
713 {
714 ev_tstamp ev_rt_now;
715 #define ev_rt_now ((loop)->ev_rt_now)
716 #define VAR(name,decl) decl;
717 #include "ev_vars.h"
718 #undef VAR
719 };
720 #include "ev_wrap.h"
721
722 static struct ev_loop default_loop_struct;
723 struct ev_loop *ev_default_loop_ptr;
724
725#else
726
727 ev_tstamp ev_rt_now;
728 #define VAR(name,decl) static decl;
729 #include "ev_vars.h"
730 #undef VAR
731
732 static int ev_default_loop_ptr;
733
734#endif
735
736#if EV_FEATURE_API
737# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
738# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
739# define EV_INVOKE_PENDING invoke_cb (EV_A)
740#else
741# define EV_RELEASE_CB (void)0
742# define EV_ACQUIRE_CB (void)0
743# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
744#endif
745
746#define EVBREAK_RECURSE 0x80
747
748/*****************************************************************************/
749
750#ifndef EV_HAVE_EV_TIME
124ev_tstamp 751ev_tstamp
125ev_time (void) 752ev_time (void)
126{ 753{
127#if EV_USE_REALTIME 754#if EV_USE_REALTIME
755 if (expect_true (have_realtime))
756 {
128 struct timespec ts; 757 struct timespec ts;
129 clock_gettime (CLOCK_REALTIME, &ts); 758 clock_gettime (CLOCK_REALTIME, &ts);
130 return ts.tv_sec + ts.tv_nsec * 1e-9; 759 return ts.tv_sec + ts.tv_nsec * 1e-9;
131#else 760 }
761#endif
762
132 struct timeval tv; 763 struct timeval tv;
133 gettimeofday (&tv, 0); 764 gettimeofday (&tv, 0);
134 return tv.tv_sec + tv.tv_usec * 1e-6; 765 return tv.tv_sec + tv.tv_usec * 1e-6;
135#endif
136} 766}
767#endif
137 768
138static ev_tstamp 769inline_size ev_tstamp
139get_clock (void) 770get_clock (void)
140{ 771{
141#if EV_USE_MONOTONIC 772#if EV_USE_MONOTONIC
142 if (expect_true (have_monotonic)) 773 if (expect_true (have_monotonic))
143 { 774 {
… …
148#endif 779#endif
149 780
150 return ev_time (); 781 return ev_time ();
151} 782}
152 783
153#define array_roundsize(base,n) ((n) | 4 & ~3) 784#if EV_MULTIPLICITY
785ev_tstamp
786ev_now (EV_P)
787{
788 return ev_rt_now;
789}
790#endif
154 791
155#define array_needsize(base,cur,cnt,init) \ 792void
156 if (expect_false ((cnt) > cur)) \ 793ev_sleep (ev_tstamp delay)
157 { \ 794{
158 int newcnt = cur; \ 795 if (delay > 0.)
159 do \
160 { \
161 newcnt = array_roundsize (base, newcnt << 1); \
162 } \
163 while ((cnt) > newcnt); \
164 \
165 base = realloc (base, sizeof (*base) * (newcnt)); \
166 init (base + cur, newcnt - cur); \
167 cur = newcnt; \
168 } 796 {
797#if EV_USE_NANOSLEEP
798 struct timespec ts;
799
800 EV_TS_SET (ts, delay);
801 nanosleep (&ts, 0);
802#elif defined(_WIN32)
803 Sleep ((unsigned long)(delay * 1e3));
804#else
805 struct timeval tv;
806
807 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
808 /* something not guaranteed by newer posix versions, but guaranteed */
809 /* by older ones */
810 EV_TV_SET (tv, delay);
811 select (0, 0, 0, 0, &tv);
812#endif
813 }
814}
169 815
170/*****************************************************************************/ 816/*****************************************************************************/
171 817
172typedef struct 818#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
173{
174 struct ev_io *head;
175 unsigned char events;
176 unsigned char reify;
177} ANFD;
178 819
179static ANFD *anfds; 820/* find a suitable new size for the given array, */
180static int anfdmax; 821/* hopefully by rounding to a nice-to-malloc size */
181 822inline_size int
182static void 823array_nextsize (int elem, int cur, int cnt)
183anfds_init (ANFD *base, int count)
184{ 824{
185 while (count--) 825 int ncur = cur + 1;
186 {
187 base->head = 0;
188 base->events = EV_NONE;
189 base->reify = 0;
190 826
191 ++base; 827 do
828 ncur <<= 1;
829 while (cnt > ncur);
830
831 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
832 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
192 } 833 {
193} 834 ncur *= elem;
194 835 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
195typedef struct 836 ncur = ncur - sizeof (void *) * 4;
196{ 837 ncur /= elem;
197 W w;
198 int events;
199} ANPENDING;
200
201static ANPENDING *pendings [NUMPRI];
202static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
203
204static void
205event (W w, int events)
206{
207 if (w->pending)
208 { 838 }
839
840 return ncur;
841}
842
843static noinline void *
844array_realloc (int elem, void *base, int *cur, int cnt)
845{
846 *cur = array_nextsize (elem, *cur, cnt);
847 return ev_realloc (base, elem * *cur);
848}
849
850#define array_init_zero(base,count) \
851 memset ((void *)(base), 0, sizeof (*(base)) * (count))
852
853#define array_needsize(type,base,cur,cnt,init) \
854 if (expect_false ((cnt) > (cur))) \
855 { \
856 int ocur_ = (cur); \
857 (base) = (type *)array_realloc \
858 (sizeof (type), (base), &(cur), (cnt)); \
859 init ((base) + (ocur_), (cur) - ocur_); \
860 }
861
862#if 0
863#define array_slim(type,stem) \
864 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
865 { \
866 stem ## max = array_roundsize (stem ## cnt >> 1); \
867 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
868 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
869 }
870#endif
871
872#define array_free(stem, idx) \
873 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
874
875/*****************************************************************************/
876
877/* dummy callback for pending events */
878static void noinline
879pendingcb (EV_P_ ev_prepare *w, int revents)
880{
881}
882
883void noinline
884ev_feed_event (EV_P_ void *w, int revents)
885{
886 W w_ = (W)w;
887 int pri = ABSPRI (w_);
888
889 if (expect_false (w_->pending))
890 pendings [pri][w_->pending - 1].events |= revents;
891 else
892 {
893 w_->pending = ++pendingcnt [pri];
894 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
895 pendings [pri][w_->pending - 1].w = w_;
209 pendings [ABSPRI (w)][w->pending - 1].events |= events; 896 pendings [pri][w_->pending - 1].events = revents;
210 return;
211 } 897 }
212
213 w->pending = ++pendingcnt [ABSPRI (w)];
214 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
215 pendings [ABSPRI (w)][w->pending - 1].w = w;
216 pendings [ABSPRI (w)][w->pending - 1].events = events;
217} 898}
218 899
219static void 900inline_speed void
901feed_reverse (EV_P_ W w)
902{
903 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
904 rfeeds [rfeedcnt++] = w;
905}
906
907inline_size void
908feed_reverse_done (EV_P_ int revents)
909{
910 do
911 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
912 while (rfeedcnt);
913}
914
915inline_speed void
220queue_events (W *events, int eventcnt, int type) 916queue_events (EV_P_ W *events, int eventcnt, int type)
221{ 917{
222 int i; 918 int i;
223 919
224 for (i = 0; i < eventcnt; ++i) 920 for (i = 0; i < eventcnt; ++i)
225 event (events [i], type); 921 ev_feed_event (EV_A_ events [i], type);
226} 922}
227 923
228static void 924/*****************************************************************************/
925
926inline_speed void
229fd_event (int fd, int events) 927fd_event_nocheck (EV_P_ int fd, int revents)
230{ 928{
231 ANFD *anfd = anfds + fd; 929 ANFD *anfd = anfds + fd;
232 struct ev_io *w; 930 ev_io *w;
233 931
234 for (w = anfd->head; w; w = w->next) 932 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
235 { 933 {
236 int ev = w->events & events; 934 int ev = w->events & revents;
237 935
238 if (ev) 936 if (ev)
239 event ((W)w, ev); 937 ev_feed_event (EV_A_ (W)w, ev);
240 } 938 }
241} 939}
242 940
243/*****************************************************************************/ 941/* do not submit kernel events for fds that have reify set */
942/* because that means they changed while we were polling for new events */
943inline_speed void
944fd_event (EV_P_ int fd, int revents)
945{
946 ANFD *anfd = anfds + fd;
244 947
245static int *fdchanges; 948 if (expect_true (!anfd->reify))
246static int fdchangemax, fdchangecnt; 949 fd_event_nocheck (EV_A_ fd, revents);
950}
247 951
248static void 952void
249fd_reify (void) 953ev_feed_fd_event (EV_P_ int fd, int revents)
954{
955 if (fd >= 0 && fd < anfdmax)
956 fd_event_nocheck (EV_A_ fd, revents);
957}
958
959/* make sure the external fd watch events are in-sync */
960/* with the kernel/libev internal state */
961inline_size void
962fd_reify (EV_P)
250{ 963{
251 int i; 964 int i;
252 965
253 for (i = 0; i < fdchangecnt; ++i) 966 for (i = 0; i < fdchangecnt; ++i)
254 { 967 {
255 int fd = fdchanges [i]; 968 int fd = fdchanges [i];
256 ANFD *anfd = anfds + fd; 969 ANFD *anfd = anfds + fd;
257 struct ev_io *w; 970 ev_io *w;
258 971
259 int events = 0; 972 unsigned char o_events = anfd->events;
973 unsigned char o_reify = anfd->reify;
260 974
261 for (w = anfd->head; w; w = w->next)
262 events |= w->events;
263
264 anfd->reify = 0; 975 anfd->reify = 0;
265 976
266 if (anfd->events != events) 977#if EV_SELECT_IS_WINSOCKET
978 if (o_reify & EV__IOFDSET)
267 { 979 {
268 method_modify (fd, anfd->events, events); 980 unsigned long arg;
269 anfd->events = events; 981 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
982 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
270 } 983 }
984#endif
985
986 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
987 {
988 anfd->events = 0;
989
990 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
991 anfd->events |= (unsigned char)w->events;
992
993 if (o_events != anfd->events)
994 o_reify = EV__IOFDSET; /* actually |= */
995 }
996
997 if (o_reify & EV__IOFDSET)
998 backend_modify (EV_A_ fd, o_events, anfd->events);
271 } 999 }
272 1000
273 fdchangecnt = 0; 1001 fdchangecnt = 0;
274} 1002}
275 1003
276static void 1004/* something about the given fd changed */
277fd_change (int fd) 1005inline_size void
1006fd_change (EV_P_ int fd, int flags)
278{ 1007{
279 if (anfds [fd].reify || fdchangecnt < 0) 1008 unsigned char reify = anfds [fd].reify;
280 return;
281
282 anfds [fd].reify = 1; 1009 anfds [fd].reify |= flags;
283 1010
1011 if (expect_true (!reify))
1012 {
284 ++fdchangecnt; 1013 ++fdchangecnt;
285 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1014 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
286 fdchanges [fdchangecnt - 1] = fd; 1015 fdchanges [fdchangecnt - 1] = fd;
1016 }
287} 1017}
288 1018
289static void 1019/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1020inline_speed void
290fd_kill (int fd) 1021fd_kill (EV_P_ int fd)
291{ 1022{
292 struct ev_io *w; 1023 ev_io *w;
293 1024
294 printf ("killing fd %d\n", fd);//D
295 while ((w = anfds [fd].head)) 1025 while ((w = (ev_io *)anfds [fd].head))
296 { 1026 {
297 ev_io_stop (w); 1027 ev_io_stop (EV_A_ w);
298 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 1028 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
299 } 1029 }
1030}
1031
1032/* check whether the given fd is actually valid, for error recovery */
1033inline_size int
1034fd_valid (int fd)
1035{
1036#ifdef _WIN32
1037 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1038#else
1039 return fcntl (fd, F_GETFD) != -1;
1040#endif
300} 1041}
301 1042
302/* called on EBADF to verify fds */ 1043/* called on EBADF to verify fds */
303static void 1044static void noinline
304fd_ebadf (void) 1045fd_ebadf (EV_P)
305{ 1046{
306 int fd; 1047 int fd;
307 1048
308 for (fd = 0; fd < anfdmax; ++fd) 1049 for (fd = 0; fd < anfdmax; ++fd)
309 if (anfds [fd].events) 1050 if (anfds [fd].events)
310 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1051 if (!fd_valid (fd) && errno == EBADF)
311 fd_kill (fd); 1052 fd_kill (EV_A_ fd);
312} 1053}
313 1054
314/* called on ENOMEM in select/poll to kill some fds and retry */ 1055/* called on ENOMEM in select/poll to kill some fds and retry */
315static void 1056static void noinline
316fd_enomem (void) 1057fd_enomem (EV_P)
317{ 1058{
318 int fd = anfdmax; 1059 int fd;
319 1060
320 while (fd--) 1061 for (fd = anfdmax; fd--; )
321 if (anfds [fd].events) 1062 if (anfds [fd].events)
322 { 1063 {
323 close (fd);
324 fd_kill (fd); 1064 fd_kill (EV_A_ fd);
325 return; 1065 break;
326 } 1066 }
327} 1067}
328 1068
1069/* usually called after fork if backend needs to re-arm all fds from scratch */
1070static void noinline
1071fd_rearm_all (EV_P)
1072{
1073 int fd;
1074
1075 for (fd = 0; fd < anfdmax; ++fd)
1076 if (anfds [fd].events)
1077 {
1078 anfds [fd].events = 0;
1079 anfds [fd].emask = 0;
1080 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1081 }
1082}
1083
1084/* used to prepare libev internal fd's */
1085/* this is not fork-safe */
1086inline_speed void
1087fd_intern (int fd)
1088{
1089#ifdef _WIN32
1090 unsigned long arg = 1;
1091 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1092#else
1093 fcntl (fd, F_SETFD, FD_CLOEXEC);
1094 fcntl (fd, F_SETFL, O_NONBLOCK);
1095#endif
1096}
1097
329/*****************************************************************************/ 1098/*****************************************************************************/
330 1099
331static struct ev_timer **timers; 1100/*
332static int timermax, timercnt; 1101 * the heap functions want a real array index. array index 0 is guaranteed to not
1102 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1103 * the branching factor of the d-tree.
1104 */
333 1105
334static struct ev_periodic **periodics; 1106/*
335static int periodicmax, periodiccnt; 1107 * at the moment we allow libev the luxury of two heaps,
1108 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1109 * which is more cache-efficient.
1110 * the difference is about 5% with 50000+ watchers.
1111 */
1112#if EV_USE_4HEAP
336 1113
1114#define DHEAP 4
1115#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1116#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1117#define UPHEAP_DONE(p,k) ((p) == (k))
1118
1119/* away from the root */
1120inline_speed void
1121downheap (ANHE *heap, int N, int k)
1122{
1123 ANHE he = heap [k];
1124 ANHE *E = heap + N + HEAP0;
1125
1126 for (;;)
1127 {
1128 ev_tstamp minat;
1129 ANHE *minpos;
1130 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1131
1132 /* find minimum child */
1133 if (expect_true (pos + DHEAP - 1 < E))
1134 {
1135 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1136 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1137 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1138 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1139 }
1140 else if (pos < E)
1141 {
1142 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1143 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1144 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1145 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1146 }
1147 else
1148 break;
1149
1150 if (ANHE_at (he) <= minat)
1151 break;
1152
1153 heap [k] = *minpos;
1154 ev_active (ANHE_w (*minpos)) = k;
1155
1156 k = minpos - heap;
1157 }
1158
1159 heap [k] = he;
1160 ev_active (ANHE_w (he)) = k;
1161}
1162
1163#else /* 4HEAP */
1164
1165#define HEAP0 1
1166#define HPARENT(k) ((k) >> 1)
1167#define UPHEAP_DONE(p,k) (!(p))
1168
1169/* away from the root */
1170inline_speed void
1171downheap (ANHE *heap, int N, int k)
1172{
1173 ANHE he = heap [k];
1174
1175 for (;;)
1176 {
1177 int c = k << 1;
1178
1179 if (c >= N + HEAP0)
1180 break;
1181
1182 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1183 ? 1 : 0;
1184
1185 if (ANHE_at (he) <= ANHE_at (heap [c]))
1186 break;
1187
1188 heap [k] = heap [c];
1189 ev_active (ANHE_w (heap [k])) = k;
1190
1191 k = c;
1192 }
1193
1194 heap [k] = he;
1195 ev_active (ANHE_w (he)) = k;
1196}
1197#endif
1198
1199/* towards the root */
1200inline_speed void
1201upheap (ANHE *heap, int k)
1202{
1203 ANHE he = heap [k];
1204
1205 for (;;)
1206 {
1207 int p = HPARENT (k);
1208
1209 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1210 break;
1211
1212 heap [k] = heap [p];
1213 ev_active (ANHE_w (heap [k])) = k;
1214 k = p;
1215 }
1216
1217 heap [k] = he;
1218 ev_active (ANHE_w (he)) = k;
1219}
1220
1221/* move an element suitably so it is in a correct place */
1222inline_size void
1223adjustheap (ANHE *heap, int N, int k)
1224{
1225 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1226 upheap (heap, k);
1227 else
1228 downheap (heap, N, k);
1229}
1230
1231/* rebuild the heap: this function is used only once and executed rarely */
1232inline_size void
1233reheap (ANHE *heap, int N)
1234{
1235 int i;
1236
1237 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1238 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1239 for (i = 0; i < N; ++i)
1240 upheap (heap, i + HEAP0);
1241}
1242
1243/*****************************************************************************/
1244
1245/* associate signal watchers to a signal signal */
1246typedef struct
1247{
1248 EV_ATOMIC_T pending;
1249#if EV_MULTIPLICITY
1250 EV_P;
1251#endif
1252 WL head;
1253} ANSIG;
1254
1255static ANSIG signals [EV_NSIG - 1];
1256
1257/*****************************************************************************/
1258
1259#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1260
1261static void noinline
1262evpipe_init (EV_P)
1263{
1264 if (!ev_is_active (&pipe_w))
1265 {
1266# if EV_USE_EVENTFD
1267 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1268 if (evfd < 0 && errno == EINVAL)
1269 evfd = eventfd (0, 0);
1270
1271 if (evfd >= 0)
1272 {
1273 evpipe [0] = -1;
1274 fd_intern (evfd); /* doing it twice doesn't hurt */
1275 ev_io_set (&pipe_w, evfd, EV_READ);
1276 }
1277 else
1278# endif
1279 {
1280 while (pipe (evpipe))
1281 ev_syserr ("(libev) error creating signal/async pipe");
1282
1283 fd_intern (evpipe [0]);
1284 fd_intern (evpipe [1]);
1285 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1286 }
1287
1288 ev_io_start (EV_A_ &pipe_w);
1289 ev_unref (EV_A); /* watcher should not keep loop alive */
1290 }
1291}
1292
1293inline_size void
1294evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1295{
1296 if (!*flag)
1297 {
1298 int old_errno = errno; /* save errno because write might clobber it */
1299 char dummy;
1300
1301 *flag = 1;
1302
1303#if EV_USE_EVENTFD
1304 if (evfd >= 0)
1305 {
1306 uint64_t counter = 1;
1307 write (evfd, &counter, sizeof (uint64_t));
1308 }
1309 else
1310#endif
1311 /* win32 people keep sending patches that change this write() to send() */
1312 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1313 /* so when you think this write should be a send instead, please find out */
1314 /* where your send() is from - it's definitely not the microsoft send, and */
1315 /* tell me. thank you. */
1316 write (evpipe [1], &dummy, 1);
1317
1318 errno = old_errno;
1319 }
1320}
1321
1322/* called whenever the libev signal pipe */
1323/* got some events (signal, async) */
337static void 1324static void
338upheap (WT *timers, int k) 1325pipecb (EV_P_ ev_io *iow, int revents)
339{ 1326{
340 WT w = timers [k]; 1327 int i;
341 1328
342 while (k && timers [k >> 1]->at > w->at) 1329#if EV_USE_EVENTFD
343 { 1330 if (evfd >= 0)
344 timers [k] = timers [k >> 1];
345 timers [k]->active = k + 1;
346 k >>= 1;
347 } 1331 {
1332 uint64_t counter;
1333 read (evfd, &counter, sizeof (uint64_t));
1334 }
1335 else
1336#endif
1337 {
1338 char dummy;
1339 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1340 read (evpipe [0], &dummy, 1);
1341 }
348 1342
349 timers [k] = w; 1343 if (sig_pending)
350 timers [k]->active = k + 1; 1344 {
1345 sig_pending = 0;
351 1346
1347 for (i = EV_NSIG - 1; i--; )
1348 if (expect_false (signals [i].pending))
1349 ev_feed_signal_event (EV_A_ i + 1);
1350 }
1351
1352#if EV_ASYNC_ENABLE
1353 if (async_pending)
1354 {
1355 async_pending = 0;
1356
1357 for (i = asynccnt; i--; )
1358 if (asyncs [i]->sent)
1359 {
1360 asyncs [i]->sent = 0;
1361 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1362 }
1363 }
1364#endif
352} 1365}
1366
1367/*****************************************************************************/
353 1368
354static void 1369static void
355downheap (WT *timers, int N, int k) 1370ev_sighandler (int signum)
356{ 1371{
357 WT w = timers [k]; 1372#if EV_MULTIPLICITY
1373 EV_P = signals [signum - 1].loop;
1374#endif
358 1375
359 while (k < (N >> 1)) 1376#ifdef _WIN32
360 { 1377 signal (signum, ev_sighandler);
361 int j = k << 1; 1378#endif
362 1379
363 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1380 signals [signum - 1].pending = 1;
364 ++j; 1381 evpipe_write (EV_A_ &sig_pending);
1382}
365 1383
366 if (w->at <= timers [j]->at) 1384void noinline
1385ev_feed_signal_event (EV_P_ int signum)
1386{
1387 WL w;
1388
1389 if (expect_false (signum <= 0 || signum > EV_NSIG))
1390 return;
1391
1392 --signum;
1393
1394#if EV_MULTIPLICITY
1395 /* it is permissible to try to feed a signal to the wrong loop */
1396 /* or, likely more useful, feeding a signal nobody is waiting for */
1397
1398 if (expect_false (signals [signum].loop != EV_A))
1399 return;
1400#endif
1401
1402 signals [signum].pending = 0;
1403
1404 for (w = signals [signum].head; w; w = w->next)
1405 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1406}
1407
1408#if EV_USE_SIGNALFD
1409static void
1410sigfdcb (EV_P_ ev_io *iow, int revents)
1411{
1412 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1413
1414 for (;;)
1415 {
1416 ssize_t res = read (sigfd, si, sizeof (si));
1417
1418 /* not ISO-C, as res might be -1, but works with SuS */
1419 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1420 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1421
1422 if (res < (ssize_t)sizeof (si))
367 break; 1423 break;
368
369 timers [k] = timers [j];
370 timers [k]->active = k + 1;
371 k = j;
372 } 1424 }
373
374 timers [k] = w;
375 timers [k]->active = k + 1;
376} 1425}
1426#endif
1427
1428#endif
377 1429
378/*****************************************************************************/ 1430/*****************************************************************************/
379 1431
380typedef struct 1432#if EV_CHILD_ENABLE
381{ 1433static WL childs [EV_PID_HASHSIZE];
382 struct ev_signal *head;
383 sig_atomic_t volatile gotsig;
384} ANSIG;
385 1434
386static ANSIG *signals;
387static int signalmax;
388
389static int sigpipe [2];
390static sig_atomic_t volatile gotsig;
391static struct ev_io sigev;
392
393static void
394signals_init (ANSIG *base, int count)
395{
396 while (count--)
397 {
398 base->head = 0;
399 base->gotsig = 0;
400
401 ++base;
402 }
403}
404
405static void
406sighandler (int signum)
407{
408 signals [signum - 1].gotsig = 1;
409
410 if (!gotsig)
411 {
412 gotsig = 1;
413 write (sigpipe [1], &signum, 1);
414 }
415}
416
417static void
418sigcb (struct ev_io *iow, int revents)
419{
420 struct ev_signal *w;
421 int signum;
422
423 read (sigpipe [0], &revents, 1);
424 gotsig = 0;
425
426 for (signum = signalmax; signum--; )
427 if (signals [signum].gotsig)
428 {
429 signals [signum].gotsig = 0;
430
431 for (w = signals [signum].head; w; w = w->next)
432 event ((W)w, EV_SIGNAL);
433 }
434}
435
436static void
437siginit (void)
438{
439 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
440 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
441
442 /* rather than sort out wether we really need nb, set it */
443 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
444 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
445
446 ev_io_set (&sigev, sigpipe [0], EV_READ);
447 ev_io_start (&sigev);
448}
449
450/*****************************************************************************/
451
452static struct ev_idle **idles;
453static int idlemax, idlecnt;
454
455static struct ev_prepare **prepares;
456static int preparemax, preparecnt;
457
458static struct ev_check **checks;
459static int checkmax, checkcnt;
460
461/*****************************************************************************/
462
463static struct ev_child *childs [PID_HASHSIZE];
464static struct ev_signal childev; 1435static ev_signal childev;
1436
1437#ifndef WIFCONTINUED
1438# define WIFCONTINUED(status) 0
1439#endif
1440
1441/* handle a single child status event */
1442inline_speed void
1443child_reap (EV_P_ int chain, int pid, int status)
1444{
1445 ev_child *w;
1446 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1447
1448 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1449 {
1450 if ((w->pid == pid || !w->pid)
1451 && (!traced || (w->flags & 1)))
1452 {
1453 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1454 w->rpid = pid;
1455 w->rstatus = status;
1456 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1457 }
1458 }
1459}
465 1460
466#ifndef WCONTINUED 1461#ifndef WCONTINUED
467# define WCONTINUED 0 1462# define WCONTINUED 0
468#endif 1463#endif
469 1464
1465/* called on sigchld etc., calls waitpid */
470static void 1466static void
471childcb (struct ev_signal *sw, int revents) 1467childcb (EV_P_ ev_signal *sw, int revents)
472{ 1468{
473 struct ev_child *w;
474 int pid, status; 1469 int pid, status;
475 1470
1471 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
476 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1472 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
477 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1473 if (!WCONTINUED
478 if (w->pid == pid || !w->pid) 1474 || errno != EINVAL
479 { 1475 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
480 w->status = status; 1476 return;
481 event ((W)w, EV_CHILD); 1477
482 } 1478 /* make sure we are called again until all children have been reaped */
1479 /* we need to do it this way so that the callback gets called before we continue */
1480 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1481
1482 child_reap (EV_A_ pid, pid, status);
1483 if ((EV_PID_HASHSIZE) > 1)
1484 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
483} 1485}
1486
1487#endif
484 1488
485/*****************************************************************************/ 1489/*****************************************************************************/
486 1490
1491#if EV_USE_PORT
1492# include "ev_port.c"
1493#endif
1494#if EV_USE_KQUEUE
1495# include "ev_kqueue.c"
1496#endif
487#if EV_USE_EPOLL 1497#if EV_USE_EPOLL
488# include "ev_epoll.c" 1498# include "ev_epoll.c"
489#endif 1499#endif
490#if EV_USE_POLL 1500#if EV_USE_POLL
491# include "ev_poll.c" 1501# include "ev_poll.c"
… …
504ev_version_minor (void) 1514ev_version_minor (void)
505{ 1515{
506 return EV_VERSION_MINOR; 1516 return EV_VERSION_MINOR;
507} 1517}
508 1518
509/* return true if we are running with elevated privileges and ignore env variables */ 1519/* return true if we are running with elevated privileges and should ignore env variables */
510static int 1520int inline_size
511enable_secure () 1521enable_secure (void)
512{ 1522{
1523#ifdef _WIN32
1524 return 0;
1525#else
513 return getuid () != geteuid () 1526 return getuid () != geteuid ()
514 || getgid () != getegid (); 1527 || getgid () != getegid ();
1528#endif
515} 1529}
516 1530
517int ev_init (int methods) 1531unsigned int
1532ev_supported_backends (void)
518{ 1533{
519 if (!ev_method) 1534 unsigned int flags = 0;
1535
1536 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1537 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1538 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1539 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1540 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1541
1542 return flags;
1543}
1544
1545unsigned int
1546ev_recommended_backends (void)
1547{
1548 unsigned int flags = ev_supported_backends ();
1549
1550#ifndef __NetBSD__
1551 /* kqueue is borked on everything but netbsd apparently */
1552 /* it usually doesn't work correctly on anything but sockets and pipes */
1553 flags &= ~EVBACKEND_KQUEUE;
1554#endif
1555#ifdef __APPLE__
1556 /* only select works correctly on that "unix-certified" platform */
1557 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1558 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1559#endif
1560#ifdef __FreeBSD__
1561 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1562#endif
1563
1564 return flags;
1565}
1566
1567unsigned int
1568ev_embeddable_backends (void)
1569{
1570 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1571
1572 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1573 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1574 flags &= ~EVBACKEND_EPOLL;
1575
1576 return flags;
1577}
1578
1579unsigned int
1580ev_backend (EV_P)
1581{
1582 return backend;
1583}
1584
1585#if EV_FEATURE_API
1586unsigned int
1587ev_iteration (EV_P)
1588{
1589 return loop_count;
1590}
1591
1592unsigned int
1593ev_depth (EV_P)
1594{
1595 return loop_depth;
1596}
1597
1598void
1599ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1600{
1601 io_blocktime = interval;
1602}
1603
1604void
1605ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1606{
1607 timeout_blocktime = interval;
1608}
1609
1610void
1611ev_set_userdata (EV_P_ void *data)
1612{
1613 userdata = data;
1614}
1615
1616void *
1617ev_userdata (EV_P)
1618{
1619 return userdata;
1620}
1621
1622void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1623{
1624 invoke_cb = invoke_pending_cb;
1625}
1626
1627void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1628{
1629 release_cb = release;
1630 acquire_cb = acquire;
1631}
1632#endif
1633
1634/* initialise a loop structure, must be zero-initialised */
1635static void noinline
1636loop_init (EV_P_ unsigned int flags)
1637{
1638 if (!backend)
520 { 1639 {
1640#if EV_USE_REALTIME
1641 if (!have_realtime)
1642 {
1643 struct timespec ts;
1644
1645 if (!clock_gettime (CLOCK_REALTIME, &ts))
1646 have_realtime = 1;
1647 }
1648#endif
1649
521#if EV_USE_MONOTONIC 1650#if EV_USE_MONOTONIC
1651 if (!have_monotonic)
1652 {
1653 struct timespec ts;
1654
1655 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1656 have_monotonic = 1;
1657 }
1658#endif
1659
1660 /* pid check not overridable via env */
1661#ifndef _WIN32
1662 if (flags & EVFLAG_FORKCHECK)
1663 curpid = getpid ();
1664#endif
1665
1666 if (!(flags & EVFLAG_NOENV)
1667 && !enable_secure ()
1668 && getenv ("LIBEV_FLAGS"))
1669 flags = atoi (getenv ("LIBEV_FLAGS"));
1670
1671 ev_rt_now = ev_time ();
1672 mn_now = get_clock ();
1673 now_floor = mn_now;
1674 rtmn_diff = ev_rt_now - mn_now;
1675#if EV_FEATURE_API
1676 invoke_cb = ev_invoke_pending;
1677#endif
1678
1679 io_blocktime = 0.;
1680 timeout_blocktime = 0.;
1681 backend = 0;
1682 backend_fd = -1;
1683 sig_pending = 0;
1684#if EV_ASYNC_ENABLE
1685 async_pending = 0;
1686#endif
1687#if EV_USE_INOTIFY
1688 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1689#endif
1690#if EV_USE_SIGNALFD
1691 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1692#endif
1693
1694 if (!(flags & 0x0000ffffU))
1695 flags |= ev_recommended_backends ();
1696
1697#if EV_USE_PORT
1698 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1699#endif
1700#if EV_USE_KQUEUE
1701 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1702#endif
1703#if EV_USE_EPOLL
1704 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1705#endif
1706#if EV_USE_POLL
1707 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1708#endif
1709#if EV_USE_SELECT
1710 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1711#endif
1712
1713 ev_prepare_init (&pending_w, pendingcb);
1714
1715#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1716 ev_init (&pipe_w, pipecb);
1717 ev_set_priority (&pipe_w, EV_MAXPRI);
1718#endif
1719 }
1720}
1721
1722/* free up a loop structure */
1723static void noinline
1724loop_destroy (EV_P)
1725{
1726 int i;
1727
1728 if (ev_is_active (&pipe_w))
1729 {
1730 /*ev_ref (EV_A);*/
1731 /*ev_io_stop (EV_A_ &pipe_w);*/
1732
1733#if EV_USE_EVENTFD
1734 if (evfd >= 0)
1735 close (evfd);
1736#endif
1737
1738 if (evpipe [0] >= 0)
1739 {
1740 EV_WIN32_CLOSE_FD (evpipe [0]);
1741 EV_WIN32_CLOSE_FD (evpipe [1]);
1742 }
1743 }
1744
1745#if EV_USE_SIGNALFD
1746 if (ev_is_active (&sigfd_w))
1747 close (sigfd);
1748#endif
1749
1750#if EV_USE_INOTIFY
1751 if (fs_fd >= 0)
1752 close (fs_fd);
1753#endif
1754
1755 if (backend_fd >= 0)
1756 close (backend_fd);
1757
1758#if EV_USE_PORT
1759 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1760#endif
1761#if EV_USE_KQUEUE
1762 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1763#endif
1764#if EV_USE_EPOLL
1765 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1766#endif
1767#if EV_USE_POLL
1768 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1769#endif
1770#if EV_USE_SELECT
1771 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1772#endif
1773
1774 for (i = NUMPRI; i--; )
1775 {
1776 array_free (pending, [i]);
1777#if EV_IDLE_ENABLE
1778 array_free (idle, [i]);
1779#endif
1780 }
1781
1782 ev_free (anfds); anfds = 0; anfdmax = 0;
1783
1784 /* have to use the microsoft-never-gets-it-right macro */
1785 array_free (rfeed, EMPTY);
1786 array_free (fdchange, EMPTY);
1787 array_free (timer, EMPTY);
1788#if EV_PERIODIC_ENABLE
1789 array_free (periodic, EMPTY);
1790#endif
1791#if EV_FORK_ENABLE
1792 array_free (fork, EMPTY);
1793#endif
1794 array_free (prepare, EMPTY);
1795 array_free (check, EMPTY);
1796#if EV_ASYNC_ENABLE
1797 array_free (async, EMPTY);
1798#endif
1799
1800 backend = 0;
1801}
1802
1803#if EV_USE_INOTIFY
1804inline_size void infy_fork (EV_P);
1805#endif
1806
1807inline_size void
1808loop_fork (EV_P)
1809{
1810#if EV_USE_PORT
1811 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1812#endif
1813#if EV_USE_KQUEUE
1814 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1815#endif
1816#if EV_USE_EPOLL
1817 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1818#endif
1819#if EV_USE_INOTIFY
1820 infy_fork (EV_A);
1821#endif
1822
1823 if (ev_is_active (&pipe_w))
1824 {
1825 /* this "locks" the handlers against writing to the pipe */
1826 /* while we modify the fd vars */
1827 sig_pending = 1;
1828#if EV_ASYNC_ENABLE
1829 async_pending = 1;
1830#endif
1831
1832 ev_ref (EV_A);
1833 ev_io_stop (EV_A_ &pipe_w);
1834
1835#if EV_USE_EVENTFD
1836 if (evfd >= 0)
1837 close (evfd);
1838#endif
1839
1840 if (evpipe [0] >= 0)
1841 {
1842 EV_WIN32_CLOSE_FD (evpipe [0]);
1843 EV_WIN32_CLOSE_FD (evpipe [1]);
1844 }
1845
1846#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1847 evpipe_init (EV_A);
1848 /* now iterate over everything, in case we missed something */
1849 pipecb (EV_A_ &pipe_w, EV_READ);
1850#endif
1851 }
1852
1853 postfork = 0;
1854}
1855
1856#if EV_MULTIPLICITY
1857
1858struct ev_loop *
1859ev_loop_new (unsigned int flags)
1860{
1861 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1862
1863 memset (EV_A, 0, sizeof (struct ev_loop));
1864 loop_init (EV_A_ flags);
1865
1866 if (ev_backend (EV_A))
1867 return EV_A;
1868
1869 return 0;
1870}
1871
1872void
1873ev_loop_destroy (EV_P)
1874{
1875 loop_destroy (EV_A);
1876 ev_free (loop);
1877}
1878
1879void
1880ev_loop_fork (EV_P)
1881{
1882 postfork = 1; /* must be in line with ev_default_fork */
1883}
1884#endif /* multiplicity */
1885
1886#if EV_VERIFY
1887static void noinline
1888verify_watcher (EV_P_ W w)
1889{
1890 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1891
1892 if (w->pending)
1893 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1894}
1895
1896static void noinline
1897verify_heap (EV_P_ ANHE *heap, int N)
1898{
1899 int i;
1900
1901 for (i = HEAP0; i < N + HEAP0; ++i)
1902 {
1903 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1904 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1905 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1906
1907 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1908 }
1909}
1910
1911static void noinline
1912array_verify (EV_P_ W *ws, int cnt)
1913{
1914 while (cnt--)
1915 {
1916 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1917 verify_watcher (EV_A_ ws [cnt]);
1918 }
1919}
1920#endif
1921
1922#if EV_FEATURE_API
1923void
1924ev_verify (EV_P)
1925{
1926#if EV_VERIFY
1927 int i;
1928 WL w;
1929
1930 assert (activecnt >= -1);
1931
1932 assert (fdchangemax >= fdchangecnt);
1933 for (i = 0; i < fdchangecnt; ++i)
1934 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1935
1936 assert (anfdmax >= 0);
1937 for (i = 0; i < anfdmax; ++i)
1938 for (w = anfds [i].head; w; w = w->next)
522 { 1939 {
523 struct timespec ts; 1940 verify_watcher (EV_A_ (W)w);
524 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1941 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
525 have_monotonic = 1; 1942 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
526 } 1943 }
1944
1945 assert (timermax >= timercnt);
1946 verify_heap (EV_A_ timers, timercnt);
1947
1948#if EV_PERIODIC_ENABLE
1949 assert (periodicmax >= periodiccnt);
1950 verify_heap (EV_A_ periodics, periodiccnt);
1951#endif
1952
1953 for (i = NUMPRI; i--; )
1954 {
1955 assert (pendingmax [i] >= pendingcnt [i]);
1956#if EV_IDLE_ENABLE
1957 assert (idleall >= 0);
1958 assert (idlemax [i] >= idlecnt [i]);
1959 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1960#endif
1961 }
1962
1963#if EV_FORK_ENABLE
1964 assert (forkmax >= forkcnt);
1965 array_verify (EV_A_ (W *)forks, forkcnt);
1966#endif
1967
1968#if EV_ASYNC_ENABLE
1969 assert (asyncmax >= asynccnt);
1970 array_verify (EV_A_ (W *)asyncs, asynccnt);
1971#endif
1972
1973#if EV_PREPARE_ENABLE
1974 assert (preparemax >= preparecnt);
1975 array_verify (EV_A_ (W *)prepares, preparecnt);
1976#endif
1977
1978#if EV_CHECK_ENABLE
1979 assert (checkmax >= checkcnt);
1980 array_verify (EV_A_ (W *)checks, checkcnt);
1981#endif
1982
1983# if 0
1984#if EV_CHILD_ENABLE
1985 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1986 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1987#endif
527#endif 1988# endif
528
529 ev_now = ev_time ();
530 now = get_clock ();
531 now_floor = now;
532 diff = ev_now - now;
533
534 if (pipe (sigpipe))
535 return 0;
536
537 if (methods == EVMETHOD_AUTO)
538 if (!enable_secure () && getenv ("LIBEV_METHODS"))
539 methods = atoi (getenv ("LIBEV_METHODS"));
540 else
541 methods = EVMETHOD_ANY;
542
543 ev_method = 0;
544#if EV_USE_EPOLL
545 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
546#endif 1989#endif
547#if EV_USE_POLL 1990}
548 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
549#endif 1991#endif
550#if EV_USE_SELECT
551 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
552#endif
553 1992
554 if (ev_method) 1993#if EV_MULTIPLICITY
1994struct ev_loop *
1995ev_default_loop_init (unsigned int flags)
1996#else
1997int
1998ev_default_loop (unsigned int flags)
1999#endif
2000{
2001 if (!ev_default_loop_ptr)
2002 {
2003#if EV_MULTIPLICITY
2004 EV_P = ev_default_loop_ptr = &default_loop_struct;
2005#else
2006 ev_default_loop_ptr = 1;
2007#endif
2008
2009 loop_init (EV_A_ flags);
2010
2011 if (ev_backend (EV_A))
555 { 2012 {
556 ev_watcher_init (&sigev, sigcb); 2013#if EV_CHILD_ENABLE
557 siginit ();
558
559 ev_signal_init (&childev, childcb, SIGCHLD); 2014 ev_signal_init (&childev, childcb, SIGCHLD);
2015 ev_set_priority (&childev, EV_MAXPRI);
560 ev_signal_start (&childev); 2016 ev_signal_start (EV_A_ &childev);
2017 ev_unref (EV_A); /* child watcher should not keep loop alive */
2018#endif
561 } 2019 }
2020 else
2021 ev_default_loop_ptr = 0;
562 } 2022 }
563 2023
564 return ev_method; 2024 return ev_default_loop_ptr;
2025}
2026
2027void
2028ev_default_destroy (void)
2029{
2030#if EV_MULTIPLICITY
2031 EV_P = ev_default_loop_ptr;
2032#endif
2033
2034 ev_default_loop_ptr = 0;
2035
2036#if EV_CHILD_ENABLE
2037 ev_ref (EV_A); /* child watcher */
2038 ev_signal_stop (EV_A_ &childev);
2039#endif
2040
2041 loop_destroy (EV_A);
2042}
2043
2044void
2045ev_default_fork (void)
2046{
2047#if EV_MULTIPLICITY
2048 EV_P = ev_default_loop_ptr;
2049#endif
2050
2051 postfork = 1; /* must be in line with ev_loop_fork */
565} 2052}
566 2053
567/*****************************************************************************/ 2054/*****************************************************************************/
568 2055
569void 2056void
570ev_fork_prepare (void) 2057ev_invoke (EV_P_ void *w, int revents)
571{ 2058{
572 /* nop */ 2059 EV_CB_INVOKE ((W)w, revents);
573} 2060}
574 2061
575void 2062unsigned int
576ev_fork_parent (void) 2063ev_pending_count (EV_P)
577{ 2064{
578 /* nop */ 2065 int pri;
579} 2066 unsigned int count = 0;
580 2067
581void 2068 for (pri = NUMPRI; pri--; )
582ev_fork_child (void) 2069 count += pendingcnt [pri];
583{
584#if EV_USE_EPOLL
585 if (ev_method == EVMETHOD_EPOLL)
586 epoll_postfork_child ();
587#endif
588 2070
589 ev_io_stop (&sigev); 2071 return count;
590 close (sigpipe [0]);
591 close (sigpipe [1]);
592 pipe (sigpipe);
593 siginit ();
594} 2072}
595 2073
596/*****************************************************************************/ 2074void noinline
597 2075ev_invoke_pending (EV_P)
598static void
599call_pending (void)
600{ 2076{
601 int pri; 2077 int pri;
602 2078
603 for (pri = NUMPRI; pri--; ) 2079 for (pri = NUMPRI; pri--; )
604 while (pendingcnt [pri]) 2080 while (pendingcnt [pri])
605 { 2081 {
606 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2082 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
607 2083
608 if (p->w) 2084 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2085 /* ^ this is no longer true, as pending_w could be here */
2086
2087 p->w->pending = 0;
2088 EV_CB_INVOKE (p->w, p->events);
2089 EV_FREQUENT_CHECK;
2090 }
2091}
2092
2093#if EV_IDLE_ENABLE
2094/* make idle watchers pending. this handles the "call-idle */
2095/* only when higher priorities are idle" logic */
2096inline_size void
2097idle_reify (EV_P)
2098{
2099 if (expect_false (idleall))
2100 {
2101 int pri;
2102
2103 for (pri = NUMPRI; pri--; )
2104 {
2105 if (pendingcnt [pri])
2106 break;
2107
2108 if (idlecnt [pri])
2109 {
2110 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2111 break;
2112 }
2113 }
2114 }
2115}
2116#endif
2117
2118/* make timers pending */
2119inline_size void
2120timers_reify (EV_P)
2121{
2122 EV_FREQUENT_CHECK;
2123
2124 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2125 {
2126 do
2127 {
2128 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2129
2130 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2131
2132 /* first reschedule or stop timer */
2133 if (w->repeat)
2134 {
2135 ev_at (w) += w->repeat;
2136 if (ev_at (w) < mn_now)
2137 ev_at (w) = mn_now;
2138
2139 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2140
2141 ANHE_at_cache (timers [HEAP0]);
2142 downheap (timers, timercnt, HEAP0);
2143 }
2144 else
2145 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2146
2147 EV_FREQUENT_CHECK;
2148 feed_reverse (EV_A_ (W)w);
2149 }
2150 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2151
2152 feed_reverse_done (EV_A_ EV_TIMER);
2153 }
2154}
2155
2156#if EV_PERIODIC_ENABLE
2157/* make periodics pending */
2158inline_size void
2159periodics_reify (EV_P)
2160{
2161 EV_FREQUENT_CHECK;
2162
2163 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2164 {
2165 int feed_count = 0;
2166
2167 do
2168 {
2169 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2170
2171 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2172
2173 /* first reschedule or stop timer */
2174 if (w->reschedule_cb)
2175 {
2176 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2177
2178 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2179
2180 ANHE_at_cache (periodics [HEAP0]);
2181 downheap (periodics, periodiccnt, HEAP0);
2182 }
2183 else if (w->interval)
2184 {
2185 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2186 /* if next trigger time is not sufficiently in the future, put it there */
2187 /* this might happen because of floating point inexactness */
2188 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2189 {
2190 ev_at (w) += w->interval;
2191
2192 /* if interval is unreasonably low we might still have a time in the past */
2193 /* so correct this. this will make the periodic very inexact, but the user */
2194 /* has effectively asked to get triggered more often than possible */
2195 if (ev_at (w) < ev_rt_now)
2196 ev_at (w) = ev_rt_now;
2197 }
2198
2199 ANHE_at_cache (periodics [HEAP0]);
2200 downheap (periodics, periodiccnt, HEAP0);
2201 }
2202 else
2203 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2204
2205 EV_FREQUENT_CHECK;
2206 feed_reverse (EV_A_ (W)w);
2207 }
2208 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2209
2210 feed_reverse_done (EV_A_ EV_PERIODIC);
2211 }
2212}
2213
2214/* simply recalculate all periodics */
2215/* TODO: maybe ensure that at least one event happens when jumping forward? */
2216static void noinline
2217periodics_reschedule (EV_P)
2218{
2219 int i;
2220
2221 /* adjust periodics after time jump */
2222 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2223 {
2224 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2225
2226 if (w->reschedule_cb)
2227 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2228 else if (w->interval)
2229 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2230
2231 ANHE_at_cache (periodics [i]);
2232 }
2233
2234 reheap (periodics, periodiccnt);
2235}
2236#endif
2237
2238/* adjust all timers by a given offset */
2239static void noinline
2240timers_reschedule (EV_P_ ev_tstamp adjust)
2241{
2242 int i;
2243
2244 for (i = 0; i < timercnt; ++i)
2245 {
2246 ANHE *he = timers + i + HEAP0;
2247 ANHE_w (*he)->at += adjust;
2248 ANHE_at_cache (*he);
2249 }
2250}
2251
2252/* fetch new monotonic and realtime times from the kernel */
2253/* also detect if there was a timejump, and act accordingly */
2254inline_speed void
2255time_update (EV_P_ ev_tstamp max_block)
2256{
2257#if EV_USE_MONOTONIC
2258 if (expect_true (have_monotonic))
2259 {
2260 int i;
2261 ev_tstamp odiff = rtmn_diff;
2262
2263 mn_now = get_clock ();
2264
2265 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2266 /* interpolate in the meantime */
2267 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2268 {
2269 ev_rt_now = rtmn_diff + mn_now;
2270 return;
2271 }
2272
2273 now_floor = mn_now;
2274 ev_rt_now = ev_time ();
2275
2276 /* loop a few times, before making important decisions.
2277 * on the choice of "4": one iteration isn't enough,
2278 * in case we get preempted during the calls to
2279 * ev_time and get_clock. a second call is almost guaranteed
2280 * to succeed in that case, though. and looping a few more times
2281 * doesn't hurt either as we only do this on time-jumps or
2282 * in the unlikely event of having been preempted here.
2283 */
2284 for (i = 4; --i; )
2285 {
2286 rtmn_diff = ev_rt_now - mn_now;
2287
2288 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2289 return; /* all is well */
2290
2291 ev_rt_now = ev_time ();
2292 mn_now = get_clock ();
2293 now_floor = mn_now;
2294 }
2295
2296 /* no timer adjustment, as the monotonic clock doesn't jump */
2297 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2298# if EV_PERIODIC_ENABLE
2299 periodics_reschedule (EV_A);
2300# endif
2301 }
2302 else
2303#endif
2304 {
2305 ev_rt_now = ev_time ();
2306
2307 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2308 {
2309 /* adjust timers. this is easy, as the offset is the same for all of them */
2310 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2311#if EV_PERIODIC_ENABLE
2312 periodics_reschedule (EV_A);
2313#endif
2314 }
2315
2316 mn_now = ev_rt_now;
2317 }
2318}
2319
2320void
2321ev_run (EV_P_ int flags)
2322{
2323#if EV_FEATURE_API
2324 ++loop_depth;
2325#endif
2326
2327 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2328
2329 loop_done = EVBREAK_CANCEL;
2330
2331 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2332
2333 do
2334 {
2335#if EV_VERIFY >= 2
2336 ev_verify (EV_A);
2337#endif
2338
2339#ifndef _WIN32
2340 if (expect_false (curpid)) /* penalise the forking check even more */
2341 if (expect_false (getpid () != curpid))
609 { 2342 {
610 p->w->pending = 0; 2343 curpid = getpid ();
611 p->w->cb (p->w, p->events); 2344 postfork = 1;
612 } 2345 }
2346#endif
2347
2348#if EV_FORK_ENABLE
2349 /* we might have forked, so queue fork handlers */
2350 if (expect_false (postfork))
2351 if (forkcnt)
2352 {
2353 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2354 EV_INVOKE_PENDING;
2355 }
2356#endif
2357
2358#if EV_PREPARE_ENABLE
2359 /* queue prepare watchers (and execute them) */
2360 if (expect_false (preparecnt))
2361 {
2362 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2363 EV_INVOKE_PENDING;
2364 }
2365#endif
2366
2367 if (expect_false (loop_done))
2368 break;
2369
2370 /* we might have forked, so reify kernel state if necessary */
2371 if (expect_false (postfork))
2372 loop_fork (EV_A);
2373
2374 /* update fd-related kernel structures */
2375 fd_reify (EV_A);
2376
2377 /* calculate blocking time */
2378 {
2379 ev_tstamp waittime = 0.;
2380 ev_tstamp sleeptime = 0.;
2381
2382 /* remember old timestamp for io_blocktime calculation */
2383 ev_tstamp prev_mn_now = mn_now;
2384
2385 /* update time to cancel out callback processing overhead */
2386 time_update (EV_A_ 1e100);
2387
2388 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
2389 {
2390 waittime = MAX_BLOCKTIME;
2391
2392 if (timercnt)
2393 {
2394 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2395 if (waittime > to) waittime = to;
2396 }
2397
2398#if EV_PERIODIC_ENABLE
2399 if (periodiccnt)
2400 {
2401 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2402 if (waittime > to) waittime = to;
2403 }
2404#endif
2405
2406 /* don't let timeouts decrease the waittime below timeout_blocktime */
2407 if (expect_false (waittime < timeout_blocktime))
2408 waittime = timeout_blocktime;
2409
2410 /* extra check because io_blocktime is commonly 0 */
2411 if (expect_false (io_blocktime))
2412 {
2413 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2414
2415 if (sleeptime > waittime - backend_fudge)
2416 sleeptime = waittime - backend_fudge;
2417
2418 if (expect_true (sleeptime > 0.))
2419 {
2420 ev_sleep (sleeptime);
2421 waittime -= sleeptime;
2422 }
2423 }
2424 }
2425
2426#if EV_FEATURE_API
2427 ++loop_count;
2428#endif
2429 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2430 backend_poll (EV_A_ waittime);
2431 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2432
2433 /* update ev_rt_now, do magic */
2434 time_update (EV_A_ waittime + sleeptime);
613 } 2435 }
614}
615 2436
616static void 2437 /* queue pending timers and reschedule them */
617timers_reify (void) 2438 timers_reify (EV_A); /* relative timers called last */
2439#if EV_PERIODIC_ENABLE
2440 periodics_reify (EV_A); /* absolute timers called first */
2441#endif
2442
2443#if EV_IDLE_ENABLE
2444 /* queue idle watchers unless other events are pending */
2445 idle_reify (EV_A);
2446#endif
2447
2448#if EV_CHECK_ENABLE
2449 /* queue check watchers, to be executed first */
2450 if (expect_false (checkcnt))
2451 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2452#endif
2453
2454 EV_INVOKE_PENDING;
2455 }
2456 while (expect_true (
2457 activecnt
2458 && !loop_done
2459 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2460 ));
2461
2462 if (loop_done == EVBREAK_ONE)
2463 loop_done = EVBREAK_CANCEL;
2464
2465#if EV_FEATURE_API
2466 --loop_depth;
2467#endif
2468}
2469
2470void
2471ev_break (EV_P_ int how)
618{ 2472{
619 while (timercnt && timers [0]->at <= now) 2473 loop_done = how;
2474}
2475
2476void
2477ev_ref (EV_P)
2478{
2479 ++activecnt;
2480}
2481
2482void
2483ev_unref (EV_P)
2484{
2485 --activecnt;
2486}
2487
2488void
2489ev_now_update (EV_P)
2490{
2491 time_update (EV_A_ 1e100);
2492}
2493
2494void
2495ev_suspend (EV_P)
2496{
2497 ev_now_update (EV_A);
2498}
2499
2500void
2501ev_resume (EV_P)
2502{
2503 ev_tstamp mn_prev = mn_now;
2504
2505 ev_now_update (EV_A);
2506 timers_reschedule (EV_A_ mn_now - mn_prev);
2507#if EV_PERIODIC_ENABLE
2508 /* TODO: really do this? */
2509 periodics_reschedule (EV_A);
2510#endif
2511}
2512
2513/*****************************************************************************/
2514/* singly-linked list management, used when the expected list length is short */
2515
2516inline_size void
2517wlist_add (WL *head, WL elem)
2518{
2519 elem->next = *head;
2520 *head = elem;
2521}
2522
2523inline_size void
2524wlist_del (WL *head, WL elem)
2525{
2526 while (*head)
2527 {
2528 if (expect_true (*head == elem))
2529 {
2530 *head = elem->next;
2531 break;
2532 }
2533
2534 head = &(*head)->next;
2535 }
2536}
2537
2538/* internal, faster, version of ev_clear_pending */
2539inline_speed void
2540clear_pending (EV_P_ W w)
2541{
2542 if (w->pending)
2543 {
2544 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2545 w->pending = 0;
2546 }
2547}
2548
2549int
2550ev_clear_pending (EV_P_ void *w)
2551{
2552 W w_ = (W)w;
2553 int pending = w_->pending;
2554
2555 if (expect_true (pending))
2556 {
2557 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2558 p->w = (W)&pending_w;
2559 w_->pending = 0;
2560 return p->events;
2561 }
2562 else
2563 return 0;
2564}
2565
2566inline_size void
2567pri_adjust (EV_P_ W w)
2568{
2569 int pri = ev_priority (w);
2570 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2571 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2572 ev_set_priority (w, pri);
2573}
2574
2575inline_speed void
2576ev_start (EV_P_ W w, int active)
2577{
2578 pri_adjust (EV_A_ w);
2579 w->active = active;
2580 ev_ref (EV_A);
2581}
2582
2583inline_size void
2584ev_stop (EV_P_ W w)
2585{
2586 ev_unref (EV_A);
2587 w->active = 0;
2588}
2589
2590/*****************************************************************************/
2591
2592void noinline
2593ev_io_start (EV_P_ ev_io *w)
2594{
2595 int fd = w->fd;
2596
2597 if (expect_false (ev_is_active (w)))
2598 return;
2599
2600 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2601 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2602
2603 EV_FREQUENT_CHECK;
2604
2605 ev_start (EV_A_ (W)w, 1);
2606 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2607 wlist_add (&anfds[fd].head, (WL)w);
2608
2609 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2610 w->events &= ~EV__IOFDSET;
2611
2612 EV_FREQUENT_CHECK;
2613}
2614
2615void noinline
2616ev_io_stop (EV_P_ ev_io *w)
2617{
2618 clear_pending (EV_A_ (W)w);
2619 if (expect_false (!ev_is_active (w)))
2620 return;
2621
2622 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2623
2624 EV_FREQUENT_CHECK;
2625
2626 wlist_del (&anfds[w->fd].head, (WL)w);
2627 ev_stop (EV_A_ (W)w);
2628
2629 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2630
2631 EV_FREQUENT_CHECK;
2632}
2633
2634void noinline
2635ev_timer_start (EV_P_ ev_timer *w)
2636{
2637 if (expect_false (ev_is_active (w)))
2638 return;
2639
2640 ev_at (w) += mn_now;
2641
2642 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2643
2644 EV_FREQUENT_CHECK;
2645
2646 ++timercnt;
2647 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2648 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2649 ANHE_w (timers [ev_active (w)]) = (WT)w;
2650 ANHE_at_cache (timers [ev_active (w)]);
2651 upheap (timers, ev_active (w));
2652
2653 EV_FREQUENT_CHECK;
2654
2655 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2656}
2657
2658void noinline
2659ev_timer_stop (EV_P_ ev_timer *w)
2660{
2661 clear_pending (EV_A_ (W)w);
2662 if (expect_false (!ev_is_active (w)))
2663 return;
2664
2665 EV_FREQUENT_CHECK;
2666
2667 {
2668 int active = ev_active (w);
2669
2670 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2671
2672 --timercnt;
2673
2674 if (expect_true (active < timercnt + HEAP0))
620 { 2675 {
621 struct ev_timer *w = timers [0]; 2676 timers [active] = timers [timercnt + HEAP0];
2677 adjustheap (timers, timercnt, active);
2678 }
2679 }
622 2680
623 /* first reschedule or stop timer */ 2681 ev_at (w) -= mn_now;
2682
2683 ev_stop (EV_A_ (W)w);
2684
2685 EV_FREQUENT_CHECK;
2686}
2687
2688void noinline
2689ev_timer_again (EV_P_ ev_timer *w)
2690{
2691 EV_FREQUENT_CHECK;
2692
2693 if (ev_is_active (w))
2694 {
624 if (w->repeat) 2695 if (w->repeat)
625 { 2696 {
626 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
627 w->at = now + w->repeat; 2697 ev_at (w) = mn_now + w->repeat;
628 downheap ((WT *)timers, timercnt, 0); 2698 ANHE_at_cache (timers [ev_active (w)]);
2699 adjustheap (timers, timercnt, ev_active (w));
629 } 2700 }
630 else 2701 else
631 ev_timer_stop (w); /* nonrepeating: stop timer */ 2702 ev_timer_stop (EV_A_ w);
632
633 event ((W)w, EV_TIMEOUT);
634 }
635}
636
637static void
638periodics_reify (void)
639{
640 while (periodiccnt && periodics [0]->at <= ev_now)
641 { 2703 }
642 struct ev_periodic *w = periodics [0]; 2704 else if (w->repeat)
2705 {
2706 ev_at (w) = w->repeat;
2707 ev_timer_start (EV_A_ w);
2708 }
643 2709
644 /* first reschedule or stop timer */ 2710 EV_FREQUENT_CHECK;
2711}
2712
2713ev_tstamp
2714ev_timer_remaining (EV_P_ ev_timer *w)
2715{
2716 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2717}
2718
2719#if EV_PERIODIC_ENABLE
2720void noinline
2721ev_periodic_start (EV_P_ ev_periodic *w)
2722{
2723 if (expect_false (ev_is_active (w)))
2724 return;
2725
2726 if (w->reschedule_cb)
2727 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
645 if (w->interval) 2728 else if (w->interval)
2729 {
2730 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2731 /* this formula differs from the one in periodic_reify because we do not always round up */
2732 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2733 }
2734 else
2735 ev_at (w) = w->offset;
2736
2737 EV_FREQUENT_CHECK;
2738
2739 ++periodiccnt;
2740 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2741 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2742 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2743 ANHE_at_cache (periodics [ev_active (w)]);
2744 upheap (periodics, ev_active (w));
2745
2746 EV_FREQUENT_CHECK;
2747
2748 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2749}
2750
2751void noinline
2752ev_periodic_stop (EV_P_ ev_periodic *w)
2753{
2754 clear_pending (EV_A_ (W)w);
2755 if (expect_false (!ev_is_active (w)))
2756 return;
2757
2758 EV_FREQUENT_CHECK;
2759
2760 {
2761 int active = ev_active (w);
2762
2763 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2764
2765 --periodiccnt;
2766
2767 if (expect_true (active < periodiccnt + HEAP0))
2768 {
2769 periodics [active] = periodics [periodiccnt + HEAP0];
2770 adjustheap (periodics, periodiccnt, active);
2771 }
2772 }
2773
2774 ev_stop (EV_A_ (W)w);
2775
2776 EV_FREQUENT_CHECK;
2777}
2778
2779void noinline
2780ev_periodic_again (EV_P_ ev_periodic *w)
2781{
2782 /* TODO: use adjustheap and recalculation */
2783 ev_periodic_stop (EV_A_ w);
2784 ev_periodic_start (EV_A_ w);
2785}
2786#endif
2787
2788#ifndef SA_RESTART
2789# define SA_RESTART 0
2790#endif
2791
2792#if EV_SIGNAL_ENABLE
2793
2794void noinline
2795ev_signal_start (EV_P_ ev_signal *w)
2796{
2797 if (expect_false (ev_is_active (w)))
2798 return;
2799
2800 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2801
2802#if EV_MULTIPLICITY
2803 assert (("libev: a signal must not be attached to two different loops",
2804 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2805
2806 signals [w->signum - 1].loop = EV_A;
2807#endif
2808
2809 EV_FREQUENT_CHECK;
2810
2811#if EV_USE_SIGNALFD
2812 if (sigfd == -2)
2813 {
2814 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2815 if (sigfd < 0 && errno == EINVAL)
2816 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2817
2818 if (sigfd >= 0)
646 { 2819 {
647 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2820 fd_intern (sigfd); /* doing it twice will not hurt */
648 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 2821
649 downheap ((WT *)periodics, periodiccnt, 0); 2822 sigemptyset (&sigfd_set);
2823
2824 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2825 ev_set_priority (&sigfd_w, EV_MAXPRI);
2826 ev_io_start (EV_A_ &sigfd_w);
2827 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2828 }
2829 }
2830
2831 if (sigfd >= 0)
2832 {
2833 /* TODO: check .head */
2834 sigaddset (&sigfd_set, w->signum);
2835 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2836
2837 signalfd (sigfd, &sigfd_set, 0);
2838 }
2839#endif
2840
2841 ev_start (EV_A_ (W)w, 1);
2842 wlist_add (&signals [w->signum - 1].head, (WL)w);
2843
2844 if (!((WL)w)->next)
2845# if EV_USE_SIGNALFD
2846 if (sigfd < 0) /*TODO*/
2847# endif
2848 {
2849# ifdef _WIN32
2850 evpipe_init (EV_A);
2851
2852 signal (w->signum, ev_sighandler);
2853# else
2854 struct sigaction sa;
2855
2856 evpipe_init (EV_A);
2857
2858 sa.sa_handler = ev_sighandler;
2859 sigfillset (&sa.sa_mask);
2860 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2861 sigaction (w->signum, &sa, 0);
2862
2863 sigemptyset (&sa.sa_mask);
2864 sigaddset (&sa.sa_mask, w->signum);
2865 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2866#endif
2867 }
2868
2869 EV_FREQUENT_CHECK;
2870}
2871
2872void noinline
2873ev_signal_stop (EV_P_ ev_signal *w)
2874{
2875 clear_pending (EV_A_ (W)w);
2876 if (expect_false (!ev_is_active (w)))
2877 return;
2878
2879 EV_FREQUENT_CHECK;
2880
2881 wlist_del (&signals [w->signum - 1].head, (WL)w);
2882 ev_stop (EV_A_ (W)w);
2883
2884 if (!signals [w->signum - 1].head)
2885 {
2886#if EV_MULTIPLICITY
2887 signals [w->signum - 1].loop = 0; /* unattach from signal */
2888#endif
2889#if EV_USE_SIGNALFD
2890 if (sigfd >= 0)
2891 {
2892 sigset_t ss;
2893
2894 sigemptyset (&ss);
2895 sigaddset (&ss, w->signum);
2896 sigdelset (&sigfd_set, w->signum);
2897
2898 signalfd (sigfd, &sigfd_set, 0);
2899 sigprocmask (SIG_UNBLOCK, &ss, 0);
650 } 2900 }
651 else 2901 else
652 ev_periodic_stop (w); /* nonrepeating: stop timer */ 2902#endif
653 2903 signal (w->signum, SIG_DFL);
654 event ((W)w, EV_PERIODIC);
655 }
656}
657
658static void
659periodics_reschedule (ev_tstamp diff)
660{
661 int i;
662
663 /* adjust periodics after time jump */
664 for (i = 0; i < periodiccnt; ++i)
665 { 2904 }
666 struct ev_periodic *w = periodics [i];
667 2905
668 if (w->interval) 2906 EV_FREQUENT_CHECK;
2907}
2908
2909#endif
2910
2911#if EV_CHILD_ENABLE
2912
2913void
2914ev_child_start (EV_P_ ev_child *w)
2915{
2916#if EV_MULTIPLICITY
2917 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2918#endif
2919 if (expect_false (ev_is_active (w)))
2920 return;
2921
2922 EV_FREQUENT_CHECK;
2923
2924 ev_start (EV_A_ (W)w, 1);
2925 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2926
2927 EV_FREQUENT_CHECK;
2928}
2929
2930void
2931ev_child_stop (EV_P_ ev_child *w)
2932{
2933 clear_pending (EV_A_ (W)w);
2934 if (expect_false (!ev_is_active (w)))
2935 return;
2936
2937 EV_FREQUENT_CHECK;
2938
2939 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2940 ev_stop (EV_A_ (W)w);
2941
2942 EV_FREQUENT_CHECK;
2943}
2944
2945#endif
2946
2947#if EV_STAT_ENABLE
2948
2949# ifdef _WIN32
2950# undef lstat
2951# define lstat(a,b) _stati64 (a,b)
2952# endif
2953
2954#define DEF_STAT_INTERVAL 5.0074891
2955#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2956#define MIN_STAT_INTERVAL 0.1074891
2957
2958static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2959
2960#if EV_USE_INOTIFY
2961
2962/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2963# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2964
2965static void noinline
2966infy_add (EV_P_ ev_stat *w)
2967{
2968 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);
2969
2970 if (w->wd >= 0)
2971 {
2972 struct statfs sfs;
2973
2974 /* now local changes will be tracked by inotify, but remote changes won't */
2975 /* unless the filesystem is known to be local, we therefore still poll */
2976 /* also do poll on <2.6.25, but with normal frequency */
2977
2978 if (!fs_2625)
2979 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2980 else if (!statfs (w->path, &sfs)
2981 && (sfs.f_type == 0x1373 /* devfs */
2982 || sfs.f_type == 0xEF53 /* ext2/3 */
2983 || sfs.f_type == 0x3153464a /* jfs */
2984 || sfs.f_type == 0x52654973 /* reiser3 */
2985 || sfs.f_type == 0x01021994 /* tempfs */
2986 || sfs.f_type == 0x58465342 /* xfs */))
2987 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2988 else
2989 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2990 }
2991 else
2992 {
2993 /* can't use inotify, continue to stat */
2994 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2995
2996 /* if path is not there, monitor some parent directory for speedup hints */
2997 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2998 /* but an efficiency issue only */
2999 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
669 { 3000 {
670 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3001 char path [4096];
3002 strcpy (path, w->path);
671 3003
672 if (fabs (diff) >= 1e-4) 3004 do
673 { 3005 {
674 ev_periodic_stop (w); 3006 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
675 ev_periodic_start (w); 3007 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
676 3008
677 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3009 char *pend = strrchr (path, '/');
3010
3011 if (!pend || pend == path)
3012 break;
3013
3014 *pend = 0;
3015 w->wd = inotify_add_watch (fs_fd, path, mask);
3016 }
3017 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3018 }
3019 }
3020
3021 if (w->wd >= 0)
3022 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3023
3024 /* now re-arm timer, if required */
3025 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3026 ev_timer_again (EV_A_ &w->timer);
3027 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3028}
3029
3030static void noinline
3031infy_del (EV_P_ ev_stat *w)
3032{
3033 int slot;
3034 int wd = w->wd;
3035
3036 if (wd < 0)
3037 return;
3038
3039 w->wd = -2;
3040 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3041 wlist_del (&fs_hash [slot].head, (WL)w);
3042
3043 /* remove this watcher, if others are watching it, they will rearm */
3044 inotify_rm_watch (fs_fd, wd);
3045}
3046
3047static void noinline
3048infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3049{
3050 if (slot < 0)
3051 /* overflow, need to check for all hash slots */
3052 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3053 infy_wd (EV_A_ slot, wd, ev);
3054 else
3055 {
3056 WL w_;
3057
3058 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3059 {
3060 ev_stat *w = (ev_stat *)w_;
3061 w_ = w_->next; /* lets us remove this watcher and all before it */
3062
3063 if (w->wd == wd || wd == -1)
3064 {
3065 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3066 {
3067 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3068 w->wd = -1;
3069 infy_add (EV_A_ w); /* re-add, no matter what */
3070 }
3071
3072 stat_timer_cb (EV_A_ &w->timer, 0);
678 } 3073 }
679 } 3074 }
680 } 3075 }
681} 3076}
682 3077
683static int 3078static void
684time_update_monotonic (void) 3079infy_cb (EV_P_ ev_io *w, int revents)
685{ 3080{
686 now = get_clock (); 3081 char buf [EV_INOTIFY_BUFSIZE];
3082 int ofs;
3083 int len = read (fs_fd, buf, sizeof (buf));
687 3084
688 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 3085 for (ofs = 0; ofs < len; )
3086 {
3087 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3088 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3089 ofs += sizeof (struct inotify_event) + ev->len;
689 { 3090 }
690 ev_now = now + diff; 3091}
3092
3093inline_size void
3094ev_check_2625 (EV_P)
3095{
3096 /* kernels < 2.6.25 are borked
3097 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3098 */
3099 if (ev_linux_version () < 0x020619)
691 return 0; 3100 return;
3101
3102 fs_2625 = 1;
3103}
3104
3105inline_size int
3106infy_newfd (void)
3107{
3108#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3109 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3110 if (fd >= 0)
3111 return fd;
3112#endif
3113 return inotify_init ();
3114}
3115
3116inline_size void
3117infy_init (EV_P)
3118{
3119 if (fs_fd != -2)
3120 return;
3121
3122 fs_fd = -1;
3123
3124 ev_check_2625 (EV_A);
3125
3126 fs_fd = infy_newfd ();
3127
3128 if (fs_fd >= 0)
692 } 3129 {
3130 fd_intern (fs_fd);
3131 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3132 ev_set_priority (&fs_w, EV_MAXPRI);
3133 ev_io_start (EV_A_ &fs_w);
3134 ev_unref (EV_A);
3135 }
3136}
3137
3138inline_size void
3139infy_fork (EV_P)
3140{
3141 int slot;
3142
3143 if (fs_fd < 0)
3144 return;
3145
3146 ev_ref (EV_A);
3147 ev_io_stop (EV_A_ &fs_w);
3148 close (fs_fd);
3149 fs_fd = infy_newfd ();
3150
3151 if (fs_fd >= 0)
3152 {
3153 fd_intern (fs_fd);
3154 ev_io_set (&fs_w, fs_fd, EV_READ);
3155 ev_io_start (EV_A_ &fs_w);
3156 ev_unref (EV_A);
3157 }
3158
3159 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3160 {
3161 WL w_ = fs_hash [slot].head;
3162 fs_hash [slot].head = 0;
3163
3164 while (w_)
3165 {
3166 ev_stat *w = (ev_stat *)w_;
3167 w_ = w_->next; /* lets us add this watcher */
3168
3169 w->wd = -1;
3170
3171 if (fs_fd >= 0)
3172 infy_add (EV_A_ w); /* re-add, no matter what */
3173 else
3174 {
3175 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3176 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3177 ev_timer_again (EV_A_ &w->timer);
3178 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3179 }
3180 }
3181 }
3182}
3183
3184#endif
3185
3186#ifdef _WIN32
3187# define EV_LSTAT(p,b) _stati64 (p, b)
3188#else
3189# define EV_LSTAT(p,b) lstat (p, b)
3190#endif
3191
3192void
3193ev_stat_stat (EV_P_ ev_stat *w)
3194{
3195 if (lstat (w->path, &w->attr) < 0)
3196 w->attr.st_nlink = 0;
3197 else if (!w->attr.st_nlink)
3198 w->attr.st_nlink = 1;
3199}
3200
3201static void noinline
3202stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3203{
3204 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3205
3206 ev_statdata prev = w->attr;
3207 ev_stat_stat (EV_A_ w);
3208
3209 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3210 if (
3211 prev.st_dev != w->attr.st_dev
3212 || prev.st_ino != w->attr.st_ino
3213 || prev.st_mode != w->attr.st_mode
3214 || prev.st_nlink != w->attr.st_nlink
3215 || prev.st_uid != w->attr.st_uid
3216 || prev.st_gid != w->attr.st_gid
3217 || prev.st_rdev != w->attr.st_rdev
3218 || prev.st_size != w->attr.st_size
3219 || prev.st_atime != w->attr.st_atime
3220 || prev.st_mtime != w->attr.st_mtime
3221 || prev.st_ctime != w->attr.st_ctime
3222 ) {
3223 /* we only update w->prev on actual differences */
3224 /* in case we test more often than invoke the callback, */
3225 /* to ensure that prev is always different to attr */
3226 w->prev = prev;
3227
3228 #if EV_USE_INOTIFY
3229 if (fs_fd >= 0)
3230 {
3231 infy_del (EV_A_ w);
3232 infy_add (EV_A_ w);
3233 ev_stat_stat (EV_A_ w); /* avoid race... */
3234 }
3235 #endif
3236
3237 ev_feed_event (EV_A_ w, EV_STAT);
3238 }
3239}
3240
3241void
3242ev_stat_start (EV_P_ ev_stat *w)
3243{
3244 if (expect_false (ev_is_active (w)))
3245 return;
3246
3247 ev_stat_stat (EV_A_ w);
3248
3249 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3250 w->interval = MIN_STAT_INTERVAL;
3251
3252 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3253 ev_set_priority (&w->timer, ev_priority (w));
3254
3255#if EV_USE_INOTIFY
3256 infy_init (EV_A);
3257
3258 if (fs_fd >= 0)
3259 infy_add (EV_A_ w);
693 else 3260 else
3261#endif
3262 {
3263 ev_timer_again (EV_A_ &w->timer);
3264 ev_unref (EV_A);
694 { 3265 }
695 now_floor = now; 3266
696 ev_now = ev_time (); 3267 ev_start (EV_A_ (W)w, 1);
3268
3269 EV_FREQUENT_CHECK;
3270}
3271
3272void
3273ev_stat_stop (EV_P_ ev_stat *w)
3274{
3275 clear_pending (EV_A_ (W)w);
3276 if (expect_false (!ev_is_active (w)))
697 return 1; 3277 return;
3278
3279 EV_FREQUENT_CHECK;
3280
3281#if EV_USE_INOTIFY
3282 infy_del (EV_A_ w);
3283#endif
3284
3285 if (ev_is_active (&w->timer))
698 } 3286 {
3287 ev_ref (EV_A);
3288 ev_timer_stop (EV_A_ &w->timer);
3289 }
3290
3291 ev_stop (EV_A_ (W)w);
3292
3293 EV_FREQUENT_CHECK;
3294}
3295#endif
3296
3297#if EV_IDLE_ENABLE
3298void
3299ev_idle_start (EV_P_ ev_idle *w)
3300{
3301 if (expect_false (ev_is_active (w)))
3302 return;
3303
3304 pri_adjust (EV_A_ (W)w);
3305
3306 EV_FREQUENT_CHECK;
3307
3308 {
3309 int active = ++idlecnt [ABSPRI (w)];
3310
3311 ++idleall;
3312 ev_start (EV_A_ (W)w, active);
3313
3314 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3315 idles [ABSPRI (w)][active - 1] = w;
3316 }
3317
3318 EV_FREQUENT_CHECK;
3319}
3320
3321void
3322ev_idle_stop (EV_P_ ev_idle *w)
3323{
3324 clear_pending (EV_A_ (W)w);
3325 if (expect_false (!ev_is_active (w)))
3326 return;
3327
3328 EV_FREQUENT_CHECK;
3329
3330 {
3331 int active = ev_active (w);
3332
3333 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3334 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3335
3336 ev_stop (EV_A_ (W)w);
3337 --idleall;
3338 }
3339
3340 EV_FREQUENT_CHECK;
3341}
3342#endif
3343
3344#if EV_PREPARE_ENABLE
3345void
3346ev_prepare_start (EV_P_ ev_prepare *w)
3347{
3348 if (expect_false (ev_is_active (w)))
3349 return;
3350
3351 EV_FREQUENT_CHECK;
3352
3353 ev_start (EV_A_ (W)w, ++preparecnt);
3354 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3355 prepares [preparecnt - 1] = w;
3356
3357 EV_FREQUENT_CHECK;
3358}
3359
3360void
3361ev_prepare_stop (EV_P_ ev_prepare *w)
3362{
3363 clear_pending (EV_A_ (W)w);
3364 if (expect_false (!ev_is_active (w)))
3365 return;
3366
3367 EV_FREQUENT_CHECK;
3368
3369 {
3370 int active = ev_active (w);
3371
3372 prepares [active - 1] = prepares [--preparecnt];
3373 ev_active (prepares [active - 1]) = active;
3374 }
3375
3376 ev_stop (EV_A_ (W)w);
3377
3378 EV_FREQUENT_CHECK;
3379}
3380#endif
3381
3382#if EV_CHECK_ENABLE
3383void
3384ev_check_start (EV_P_ ev_check *w)
3385{
3386 if (expect_false (ev_is_active (w)))
3387 return;
3388
3389 EV_FREQUENT_CHECK;
3390
3391 ev_start (EV_A_ (W)w, ++checkcnt);
3392 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3393 checks [checkcnt - 1] = w;
3394
3395 EV_FREQUENT_CHECK;
3396}
3397
3398void
3399ev_check_stop (EV_P_ ev_check *w)
3400{
3401 clear_pending (EV_A_ (W)w);
3402 if (expect_false (!ev_is_active (w)))
3403 return;
3404
3405 EV_FREQUENT_CHECK;
3406
3407 {
3408 int active = ev_active (w);
3409
3410 checks [active - 1] = checks [--checkcnt];
3411 ev_active (checks [active - 1]) = active;
3412 }
3413
3414 ev_stop (EV_A_ (W)w);
3415
3416 EV_FREQUENT_CHECK;
3417}
3418#endif
3419
3420#if EV_EMBED_ENABLE
3421void noinline
3422ev_embed_sweep (EV_P_ ev_embed *w)
3423{
3424 ev_run (w->other, EVRUN_NOWAIT);
699} 3425}
700 3426
701static void 3427static void
702time_update (void) 3428embed_io_cb (EV_P_ ev_io *io, int revents)
703{ 3429{
704 int i; 3430 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
705 3431
706#if EV_USE_MONOTONIC 3432 if (ev_cb (w))
707 if (expect_true (have_monotonic)) 3433 ev_feed_event (EV_A_ (W)w, EV_EMBED);
708 {
709 if (time_update_monotonic ())
710 {
711 ev_tstamp odiff = diff;
712
713 for (i = 4; --i; ) /* loop a few times, before making important decisions */
714 {
715 diff = ev_now - now;
716
717 if (fabs (odiff - diff) < MIN_TIMEJUMP)
718 return; /* all is well */
719
720 ev_now = ev_time ();
721 now = get_clock ();
722 now_floor = now;
723 }
724
725 periodics_reschedule (diff - odiff);
726 /* no timer adjustment, as the monotonic clock doesn't jump */
727 }
728 }
729 else 3434 else
730#endif 3435 ev_run (w->other, EVRUN_NOWAIT);
3436}
3437
3438static void
3439embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3440{
3441 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3442
731 { 3443 {
732 ev_now = ev_time (); 3444 EV_P = w->other;
733 3445
734 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 3446 while (fdchangecnt)
735 { 3447 {
736 periodics_reschedule (ev_now - now); 3448 fd_reify (EV_A);
737 3449 ev_run (EV_A_ EVRUN_NOWAIT);
738 /* adjust timers. this is easy, as the offset is the same for all */
739 for (i = 0; i < timercnt; ++i)
740 timers [i]->at += diff;
741 } 3450 }
742
743 now = ev_now;
744 } 3451 }
745} 3452}
746 3453
747int ev_loop_done; 3454static void
748 3455embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
749void ev_loop (int flags)
750{ 3456{
751 double block; 3457 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
752 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
753 3458
754 do 3459 ev_embed_stop (EV_A_ w);
3460
755 { 3461 {
756 /* queue check watchers (and execute them) */ 3462 EV_P = w->other;
757 if (expect_false (preparecnt))
758 {
759 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
760 call_pending ();
761 }
762 3463
763 /* update fd-related kernel structures */ 3464 ev_loop_fork (EV_A);
764 fd_reify (); 3465 ev_run (EV_A_ EVRUN_NOWAIT);
765
766 /* calculate blocking time */
767
768 /* we only need this for !monotonic clockor timers, but as we basically
769 always have timers, we just calculate it always */
770#if EV_USE_MONOTONIC
771 if (expect_true (have_monotonic))
772 time_update_monotonic ();
773 else
774#endif
775 {
776 ev_now = ev_time ();
777 now = ev_now;
778 }
779
780 if (flags & EVLOOP_NONBLOCK || idlecnt)
781 block = 0.;
782 else
783 {
784 block = MAX_BLOCKTIME;
785
786 if (timercnt)
787 {
788 ev_tstamp to = timers [0]->at - now + method_fudge;
789 if (block > to) block = to;
790 }
791
792 if (periodiccnt)
793 {
794 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
795 if (block > to) block = to;
796 }
797
798 if (block < 0.) block = 0.;
799 }
800
801 method_poll (block);
802
803 /* update ev_now, do magic */
804 time_update ();
805
806 /* queue pending timers and reschedule them */
807 timers_reify (); /* relative timers called last */
808 periodics_reify (); /* absolute timers called first */
809
810 /* queue idle watchers unless io or timers are pending */
811 if (!pendingcnt)
812 queue_events ((W *)idles, idlecnt, EV_IDLE);
813
814 /* queue check watchers, to be executed first */
815 if (checkcnt)
816 queue_events ((W *)checks, checkcnt, EV_CHECK);
817
818 call_pending ();
819 } 3466 }
820 while (!ev_loop_done);
821 3467
822 if (ev_loop_done != 2) 3468 ev_embed_start (EV_A_ w);
823 ev_loop_done = 0;
824} 3469}
3470
3471#if 0
3472static void
3473embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3474{
3475 ev_idle_stop (EV_A_ idle);
3476}
3477#endif
3478
3479void
3480ev_embed_start (EV_P_ ev_embed *w)
3481{
3482 if (expect_false (ev_is_active (w)))
3483 return;
3484
3485 {
3486 EV_P = w->other;
3487 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3488 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3489 }
3490
3491 EV_FREQUENT_CHECK;
3492
3493 ev_set_priority (&w->io, ev_priority (w));
3494 ev_io_start (EV_A_ &w->io);
3495
3496 ev_prepare_init (&w->prepare, embed_prepare_cb);
3497 ev_set_priority (&w->prepare, EV_MINPRI);
3498 ev_prepare_start (EV_A_ &w->prepare);
3499
3500 ev_fork_init (&w->fork, embed_fork_cb);
3501 ev_fork_start (EV_A_ &w->fork);
3502
3503 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3504
3505 ev_start (EV_A_ (W)w, 1);
3506
3507 EV_FREQUENT_CHECK;
3508}
3509
3510void
3511ev_embed_stop (EV_P_ ev_embed *w)
3512{
3513 clear_pending (EV_A_ (W)w);
3514 if (expect_false (!ev_is_active (w)))
3515 return;
3516
3517 EV_FREQUENT_CHECK;
3518
3519 ev_io_stop (EV_A_ &w->io);
3520 ev_prepare_stop (EV_A_ &w->prepare);
3521 ev_fork_stop (EV_A_ &w->fork);
3522
3523 ev_stop (EV_A_ (W)w);
3524
3525 EV_FREQUENT_CHECK;
3526}
3527#endif
3528
3529#if EV_FORK_ENABLE
3530void
3531ev_fork_start (EV_P_ ev_fork *w)
3532{
3533 if (expect_false (ev_is_active (w)))
3534 return;
3535
3536 EV_FREQUENT_CHECK;
3537
3538 ev_start (EV_A_ (W)w, ++forkcnt);
3539 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3540 forks [forkcnt - 1] = w;
3541
3542 EV_FREQUENT_CHECK;
3543}
3544
3545void
3546ev_fork_stop (EV_P_ ev_fork *w)
3547{
3548 clear_pending (EV_A_ (W)w);
3549 if (expect_false (!ev_is_active (w)))
3550 return;
3551
3552 EV_FREQUENT_CHECK;
3553
3554 {
3555 int active = ev_active (w);
3556
3557 forks [active - 1] = forks [--forkcnt];
3558 ev_active (forks [active - 1]) = active;
3559 }
3560
3561 ev_stop (EV_A_ (W)w);
3562
3563 EV_FREQUENT_CHECK;
3564}
3565#endif
3566
3567#if EV_ASYNC_ENABLE
3568void
3569ev_async_start (EV_P_ ev_async *w)
3570{
3571 if (expect_false (ev_is_active (w)))
3572 return;
3573
3574 w->sent = 0;
3575
3576 evpipe_init (EV_A);
3577
3578 EV_FREQUENT_CHECK;
3579
3580 ev_start (EV_A_ (W)w, ++asynccnt);
3581 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3582 asyncs [asynccnt - 1] = w;
3583
3584 EV_FREQUENT_CHECK;
3585}
3586
3587void
3588ev_async_stop (EV_P_ ev_async *w)
3589{
3590 clear_pending (EV_A_ (W)w);
3591 if (expect_false (!ev_is_active (w)))
3592 return;
3593
3594 EV_FREQUENT_CHECK;
3595
3596 {
3597 int active = ev_active (w);
3598
3599 asyncs [active - 1] = asyncs [--asynccnt];
3600 ev_active (asyncs [active - 1]) = active;
3601 }
3602
3603 ev_stop (EV_A_ (W)w);
3604
3605 EV_FREQUENT_CHECK;
3606}
3607
3608void
3609ev_async_send (EV_P_ ev_async *w)
3610{
3611 w->sent = 1;
3612 evpipe_write (EV_A_ &async_pending);
3613}
3614#endif
825 3615
826/*****************************************************************************/ 3616/*****************************************************************************/
827 3617
828static void
829wlist_add (WL *head, WL elem)
830{
831 elem->next = *head;
832 *head = elem;
833}
834
835static void
836wlist_del (WL *head, WL elem)
837{
838 while (*head)
839 {
840 if (*head == elem)
841 {
842 *head = elem->next;
843 return;
844 }
845
846 head = &(*head)->next;
847 }
848}
849
850static void
851ev_clear_pending (W w)
852{
853 if (w->pending)
854 {
855 pendings [ABSPRI (w)][w->pending - 1].w = 0;
856 w->pending = 0;
857 }
858}
859
860static void
861ev_start (W w, int active)
862{
863 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
864 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
865
866 w->active = active;
867}
868
869static void
870ev_stop (W w)
871{
872 w->active = 0;
873}
874
875/*****************************************************************************/
876
877void
878ev_io_start (struct ev_io *w)
879{
880 int fd = w->fd;
881
882 if (ev_is_active (w))
883 return;
884
885 assert (("ev_io_start called with negative fd", fd >= 0));
886
887 ev_start ((W)w, 1);
888 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
889 wlist_add ((WL *)&anfds[fd].head, (WL)w);
890
891 fd_change (fd);
892}
893
894void
895ev_io_stop (struct ev_io *w)
896{
897 ev_clear_pending ((W)w);
898 if (!ev_is_active (w))
899 return;
900
901 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
902 ev_stop ((W)w);
903
904 fd_change (w->fd);
905}
906
907void
908ev_timer_start (struct ev_timer *w)
909{
910 if (ev_is_active (w))
911 return;
912
913 w->at += now;
914
915 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
916
917 ev_start ((W)w, ++timercnt);
918 array_needsize (timers, timermax, timercnt, );
919 timers [timercnt - 1] = w;
920 upheap ((WT *)timers, timercnt - 1);
921}
922
923void
924ev_timer_stop (struct ev_timer *w)
925{
926 ev_clear_pending ((W)w);
927 if (!ev_is_active (w))
928 return;
929
930 if (w->active < timercnt--)
931 {
932 timers [w->active - 1] = timers [timercnt];
933 downheap ((WT *)timers, timercnt, w->active - 1);
934 }
935
936 w->at = w->repeat;
937
938 ev_stop ((W)w);
939}
940
941void
942ev_timer_again (struct ev_timer *w)
943{
944 if (ev_is_active (w))
945 {
946 if (w->repeat)
947 {
948 w->at = now + w->repeat;
949 downheap ((WT *)timers, timercnt, w->active - 1);
950 }
951 else
952 ev_timer_stop (w);
953 }
954 else if (w->repeat)
955 ev_timer_start (w);
956}
957
958void
959ev_periodic_start (struct ev_periodic *w)
960{
961 if (ev_is_active (w))
962 return;
963
964 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
965
966 /* this formula differs from the one in periodic_reify because we do not always round up */
967 if (w->interval)
968 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
969
970 ev_start ((W)w, ++periodiccnt);
971 array_needsize (periodics, periodicmax, periodiccnt, );
972 periodics [periodiccnt - 1] = w;
973 upheap ((WT *)periodics, periodiccnt - 1);
974}
975
976void
977ev_periodic_stop (struct ev_periodic *w)
978{
979 ev_clear_pending ((W)w);
980 if (!ev_is_active (w))
981 return;
982
983 if (w->active < periodiccnt--)
984 {
985 periodics [w->active - 1] = periodics [periodiccnt];
986 downheap ((WT *)periodics, periodiccnt, w->active - 1);
987 }
988
989 ev_stop ((W)w);
990}
991
992void
993ev_signal_start (struct ev_signal *w)
994{
995 if (ev_is_active (w))
996 return;
997
998 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
999
1000 ev_start ((W)w, 1);
1001 array_needsize (signals, signalmax, w->signum, signals_init);
1002 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1003
1004 if (!w->next)
1005 {
1006 struct sigaction sa;
1007 sa.sa_handler = sighandler;
1008 sigfillset (&sa.sa_mask);
1009 sa.sa_flags = 0;
1010 sigaction (w->signum, &sa, 0);
1011 }
1012}
1013
1014void
1015ev_signal_stop (struct ev_signal *w)
1016{
1017 ev_clear_pending ((W)w);
1018 if (!ev_is_active (w))
1019 return;
1020
1021 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1022 ev_stop ((W)w);
1023
1024 if (!signals [w->signum - 1].head)
1025 signal (w->signum, SIG_DFL);
1026}
1027
1028void
1029ev_idle_start (struct ev_idle *w)
1030{
1031 if (ev_is_active (w))
1032 return;
1033
1034 ev_start ((W)w, ++idlecnt);
1035 array_needsize (idles, idlemax, idlecnt, );
1036 idles [idlecnt - 1] = w;
1037}
1038
1039void
1040ev_idle_stop (struct ev_idle *w)
1041{
1042 ev_clear_pending ((W)w);
1043 if (ev_is_active (w))
1044 return;
1045
1046 idles [w->active - 1] = idles [--idlecnt];
1047 ev_stop ((W)w);
1048}
1049
1050void
1051ev_prepare_start (struct ev_prepare *w)
1052{
1053 if (ev_is_active (w))
1054 return;
1055
1056 ev_start ((W)w, ++preparecnt);
1057 array_needsize (prepares, preparemax, preparecnt, );
1058 prepares [preparecnt - 1] = w;
1059}
1060
1061void
1062ev_prepare_stop (struct ev_prepare *w)
1063{
1064 ev_clear_pending ((W)w);
1065 if (ev_is_active (w))
1066 return;
1067
1068 prepares [w->active - 1] = prepares [--preparecnt];
1069 ev_stop ((W)w);
1070}
1071
1072void
1073ev_check_start (struct ev_check *w)
1074{
1075 if (ev_is_active (w))
1076 return;
1077
1078 ev_start ((W)w, ++checkcnt);
1079 array_needsize (checks, checkmax, checkcnt, );
1080 checks [checkcnt - 1] = w;
1081}
1082
1083void
1084ev_check_stop (struct ev_check *w)
1085{
1086 ev_clear_pending ((W)w);
1087 if (ev_is_active (w))
1088 return;
1089
1090 checks [w->active - 1] = checks [--checkcnt];
1091 ev_stop ((W)w);
1092}
1093
1094void
1095ev_child_start (struct ev_child *w)
1096{
1097 if (ev_is_active (w))
1098 return;
1099
1100 ev_start ((W)w, 1);
1101 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1102}
1103
1104void
1105ev_child_stop (struct ev_child *w)
1106{
1107 ev_clear_pending ((W)w);
1108 if (ev_is_active (w))
1109 return;
1110
1111 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1112 ev_stop ((W)w);
1113}
1114
1115/*****************************************************************************/
1116
1117struct ev_once 3618struct ev_once
1118{ 3619{
1119 struct ev_io io; 3620 ev_io io;
1120 struct ev_timer to; 3621 ev_timer to;
1121 void (*cb)(int revents, void *arg); 3622 void (*cb)(int revents, void *arg);
1122 void *arg; 3623 void *arg;
1123}; 3624};
1124 3625
1125static void 3626static void
1126once_cb (struct ev_once *once, int revents) 3627once_cb (EV_P_ struct ev_once *once, int revents)
1127{ 3628{
1128 void (*cb)(int revents, void *arg) = once->cb; 3629 void (*cb)(int revents, void *arg) = once->cb;
1129 void *arg = once->arg; 3630 void *arg = once->arg;
1130 3631
1131 ev_io_stop (&once->io); 3632 ev_io_stop (EV_A_ &once->io);
1132 ev_timer_stop (&once->to); 3633 ev_timer_stop (EV_A_ &once->to);
1133 free (once); 3634 ev_free (once);
1134 3635
1135 cb (revents, arg); 3636 cb (revents, arg);
1136} 3637}
1137 3638
1138static void 3639static void
1139once_cb_io (struct ev_io *w, int revents) 3640once_cb_io (EV_P_ ev_io *w, int revents)
1140{ 3641{
1141 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3642 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3643
3644 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1142} 3645}
1143 3646
1144static void 3647static void
1145once_cb_to (struct ev_timer *w, int revents) 3648once_cb_to (EV_P_ ev_timer *w, int revents)
1146{ 3649{
1147 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3650 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1148}
1149 3651
3652 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3653}
3654
1150void 3655void
1151ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3656ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1152{ 3657{
1153 struct ev_once *once = malloc (sizeof (struct ev_once)); 3658 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1154 3659
1155 if (!once) 3660 if (expect_false (!once))
3661 {
1156 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3662 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1157 else 3663 return;
1158 { 3664 }
3665
1159 once->cb = cb; 3666 once->cb = cb;
1160 once->arg = arg; 3667 once->arg = arg;
1161 3668
1162 ev_watcher_init (&once->io, once_cb_io); 3669 ev_init (&once->io, once_cb_io);
1163 if (fd >= 0) 3670 if (fd >= 0)
3671 {
3672 ev_io_set (&once->io, fd, events);
3673 ev_io_start (EV_A_ &once->io);
3674 }
3675
3676 ev_init (&once->to, once_cb_to);
3677 if (timeout >= 0.)
3678 {
3679 ev_timer_set (&once->to, timeout, 0.);
3680 ev_timer_start (EV_A_ &once->to);
3681 }
3682}
3683
3684/*****************************************************************************/
3685
3686#if EV_WALK_ENABLE
3687void
3688ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3689{
3690 int i, j;
3691 ev_watcher_list *wl, *wn;
3692
3693 if (types & (EV_IO | EV_EMBED))
3694 for (i = 0; i < anfdmax; ++i)
3695 for (wl = anfds [i].head; wl; )
1164 { 3696 {
1165 ev_io_set (&once->io, fd, events); 3697 wn = wl->next;
1166 ev_io_start (&once->io); 3698
3699#if EV_EMBED_ENABLE
3700 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3701 {
3702 if (types & EV_EMBED)
3703 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3704 }
3705 else
3706#endif
3707#if EV_USE_INOTIFY
3708 if (ev_cb ((ev_io *)wl) == infy_cb)
3709 ;
3710 else
3711#endif
3712 if ((ev_io *)wl != &pipe_w)
3713 if (types & EV_IO)
3714 cb (EV_A_ EV_IO, wl);
3715
3716 wl = wn;
1167 } 3717 }
1168 3718
1169 ev_watcher_init (&once->to, once_cb_to); 3719 if (types & (EV_TIMER | EV_STAT))
1170 if (timeout >= 0.) 3720 for (i = timercnt + HEAP0; i-- > HEAP0; )
3721#if EV_STAT_ENABLE
3722 /*TODO: timer is not always active*/
3723 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1171 { 3724 {
1172 ev_timer_set (&once->to, timeout, 0.); 3725 if (types & EV_STAT)
1173 ev_timer_start (&once->to); 3726 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1174 } 3727 }
1175 } 3728 else
1176} 3729#endif
3730 if (types & EV_TIMER)
3731 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1177 3732
1178/*****************************************************************************/ 3733#if EV_PERIODIC_ENABLE
3734 if (types & EV_PERIODIC)
3735 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3736 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3737#endif
1179 3738
1180#if 0 3739#if EV_IDLE_ENABLE
3740 if (types & EV_IDLE)
3741 for (j = NUMPRI; i--; )
3742 for (i = idlecnt [j]; i--; )
3743 cb (EV_A_ EV_IDLE, idles [j][i]);
3744#endif
1181 3745
1182struct ev_io wio; 3746#if EV_FORK_ENABLE
3747 if (types & EV_FORK)
3748 for (i = forkcnt; i--; )
3749 if (ev_cb (forks [i]) != embed_fork_cb)
3750 cb (EV_A_ EV_FORK, forks [i]);
3751#endif
1183 3752
1184static void 3753#if EV_ASYNC_ENABLE
1185sin_cb (struct ev_io *w, int revents) 3754 if (types & EV_ASYNC)
1186{ 3755 for (i = asynccnt; i--; )
1187 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3756 cb (EV_A_ EV_ASYNC, asyncs [i]);
1188} 3757#endif
1189 3758
1190static void 3759#if EV_PREPARE_ENABLE
1191ocb (struct ev_timer *w, int revents) 3760 if (types & EV_PREPARE)
1192{ 3761 for (i = preparecnt; i--; )
1193 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3762# if EV_EMBED_ENABLE
1194 ev_timer_stop (w); 3763 if (ev_cb (prepares [i]) != embed_prepare_cb)
1195 ev_timer_start (w);
1196}
1197
1198static void
1199scb (struct ev_signal *w, int revents)
1200{
1201 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1202 ev_io_stop (&wio);
1203 ev_io_start (&wio);
1204}
1205
1206static void
1207gcb (struct ev_signal *w, int revents)
1208{
1209 fprintf (stderr, "generic %x\n", revents);
1210
1211}
1212
1213int main (void)
1214{
1215 ev_init (0);
1216
1217 ev_io_init (&wio, sin_cb, 0, EV_READ);
1218 ev_io_start (&wio);
1219
1220 struct ev_timer t[10000];
1221
1222#if 0
1223 int i;
1224 for (i = 0; i < 10000; ++i)
1225 {
1226 struct ev_timer *w = t + i;
1227 ev_watcher_init (w, ocb, i);
1228 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1229 ev_timer_start (w);
1230 if (drand48 () < 0.5)
1231 ev_timer_stop (w);
1232 }
1233#endif 3764# endif
1234 3765 cb (EV_A_ EV_PREPARE, prepares [i]);
1235 struct ev_timer t1;
1236 ev_timer_init (&t1, ocb, 5, 10);
1237 ev_timer_start (&t1);
1238
1239 struct ev_signal sig;
1240 ev_signal_init (&sig, scb, SIGQUIT);
1241 ev_signal_start (&sig);
1242
1243 struct ev_check cw;
1244 ev_check_init (&cw, gcb);
1245 ev_check_start (&cw);
1246
1247 struct ev_idle iw;
1248 ev_idle_init (&iw, gcb);
1249 ev_idle_start (&iw);
1250
1251 ev_loop (0);
1252
1253 return 0;
1254}
1255
1256#endif 3766#endif
1257 3767
3768#if EV_CHECK_ENABLE
3769 if (types & EV_CHECK)
3770 for (i = checkcnt; i--; )
3771 cb (EV_A_ EV_CHECK, checks [i]);
3772#endif
1258 3773
3774#if EV_SIGNAL_ENABLE
3775 if (types & EV_SIGNAL)
3776 for (i = 0; i < EV_NSIG - 1; ++i)
3777 for (wl = signals [i].head; wl; )
3778 {
3779 wn = wl->next;
3780 cb (EV_A_ EV_SIGNAL, wl);
3781 wl = wn;
3782 }
3783#endif
1259 3784
3785#if EV_CHILD_ENABLE
3786 if (types & EV_CHILD)
3787 for (i = (EV_PID_HASHSIZE); i--; )
3788 for (wl = childs [i]; wl; )
3789 {
3790 wn = wl->next;
3791 cb (EV_A_ EV_CHILD, wl);
3792 wl = wn;
3793 }
3794#endif
3795/* EV_STAT 0x00001000 /* stat data changed */
3796/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3797}
3798#endif
1260 3799
3800#if EV_MULTIPLICITY
3801 #include "ev_wrap.h"
3802#endif
3803
3804EV_CPP(})
3805

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