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Comparing libev/ev.c (file contents):
Revision 1.46 by root, Sat Nov 3 09:20:12 2007 UTC vs.
Revision 1.357 by root, Sat Oct 23 22:25:44 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>
172#include <time.h>
173#include <limits.h>
174
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
47#ifndef WIN32 185#ifndef _WIN32
186# include <sys/time.h>
48# include <sys/wait.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
49#endif 195# endif
50#include <sys/time.h> 196# undef EV_AVOID_STDIO
51#include <time.h> 197#endif
52 198
53/**/ 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
54 244
55#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
56# 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
57#endif 263#endif
58 264
59#ifndef EV_USE_SELECT 265#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 266# define EV_USE_SELECT EV_FEATURE_BACKENDS
61#endif 267#endif
62 268
63#ifndef EV_USE_POLL 269#ifndef EV_USE_POLL
64# 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
65#endif 275#endif
66 276
67#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
68# define EV_USE_EPOLL 0 281# define EV_USE_EPOLL 0
282# endif
69#endif 283#endif
70 284
71#ifndef EV_USE_KQUEUE 285#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 286# define EV_USE_KQUEUE 0
73#endif 287#endif
74 288
75#ifndef EV_USE_REALTIME 289#ifndef EV_USE_PORT
76# 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
77#endif 298# endif
299#endif
78 300
79/**/ 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
80 364
81#ifndef CLOCK_MONOTONIC 365#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC 366# undef EV_USE_MONOTONIC
83# define EV_USE_MONOTONIC 0 367# define EV_USE_MONOTONIC 0
84#endif 368#endif
… …
86#ifndef CLOCK_REALTIME 370#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 371# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 372# define EV_USE_REALTIME 0
89#endif 373#endif
90 374
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/statfs.h>
388# include <sys/inotify.h>
389/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
390# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0
393# endif
394#endif
395
396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif
399
400#if EV_USE_EVENTFD
401/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
402# include <stdint.h>
403# ifndef EFD_NONBLOCK
404# define EFD_NONBLOCK O_NONBLOCK
405# endif
406# ifndef EFD_CLOEXEC
407# ifdef O_CLOEXEC
408# define EFD_CLOEXEC O_CLOEXEC
409# else
410# define EFD_CLOEXEC 02000000
411# endif
412# endif
413EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
414#endif
415
416#if EV_USE_SIGNALFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef SFD_NONBLOCK
420# define SFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef SFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define SFD_CLOEXEC O_CLOEXEC
425# else
426# define SFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
430
431struct signalfd_siginfo
432{
433 uint32_t ssi_signo;
434 char pad[128 - sizeof (uint32_t)];
435};
436#endif
437
91/**/ 438/**/
92 439
440#if EV_VERIFY >= 3
441# define EV_FREQUENT_CHECK ev_verify (EV_A)
442#else
443# define EV_FREQUENT_CHECK do { } while (0)
444#endif
445
446/*
447 * This is used to avoid floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */
454#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
455
93#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 456#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
97 458
98#include "ev.h" 459#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
460#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
99 461
100#if __GNUC__ >= 3 462#if __GNUC__ >= 4
101# define expect(expr,value) __builtin_expect ((expr),(value)) 463# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline 464# define noinline __attribute__ ((noinline))
103#else 465#else
104# define expect(expr,value) (expr) 466# define expect(expr,value) (expr)
105# define inline static 467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif
106#endif 471#endif
107 472
108#define expect_false(expr) expect ((expr) != 0, 0) 473#define expect_false(expr) expect ((expr) != 0, 0)
109#define expect_true(expr) expect ((expr) != 0, 1) 474#define expect_true(expr) expect ((expr) != 0, 1)
475#define inline_size static inline
110 476
477#if EV_FEATURE_CODE
478# define inline_speed static inline
479#else
480# define inline_speed static noinline
481#endif
482
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
484
485#if EV_MINPRI == EV_MAXPRI
486# define ABSPRI(w) (((W)w), 0)
487#else
112#define ABSPRI(w) ((w)->priority - EV_MINPRI) 488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif
113 490
491#define EMPTY /* required for microsofts broken pseudo-c compiler */
492#define EMPTY2(a,b) /* used to suppress some warnings */
493
114typedef struct ev_watcher *W; 494typedef ev_watcher *W;
115typedef struct ev_watcher_list *WL; 495typedef ev_watcher_list *WL;
116typedef struct ev_watcher_time *WT; 496typedef ev_watcher_time *WT;
117 497
118static ev_tstamp now_floor, now, diff; /* monotonic clock */ 498#define ev_active(w) ((W)(w))->active
119ev_tstamp ev_now; 499#define ev_at(w) ((WT)(w))->at
120int ev_method;
121 500
122static int have_monotonic; /* runtime */ 501#if EV_USE_REALTIME
502/* sig_atomic_t is used to avoid per-thread variables or locking but still */
503/* giving it a reasonably high chance of working on typical architectures */
504static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
505#endif
123 506
124static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 507#if EV_USE_MONOTONIC
125static void (*method_modify)(int fd, int oev, int nev); 508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
126static void (*method_poll)(ev_tstamp timeout); 509#endif
510
511#ifndef EV_FD_TO_WIN32_HANDLE
512# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
513#endif
514#ifndef EV_WIN32_HANDLE_TO_FD
515# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
516#endif
517#ifndef EV_WIN32_CLOSE_FD
518# define EV_WIN32_CLOSE_FD(fd) close (fd)
519#endif
520
521#ifdef _WIN32
522# include "ev_win32.c"
523#endif
127 524
128/*****************************************************************************/ 525/*****************************************************************************/
129 526
527#ifdef __linux
528# include <sys/utsname.h>
529#endif
530
531static unsigned int noinline
532ev_linux_version (void)
533{
534#ifdef __linux
535 struct utsname buf;
536 unsigned int v;
537 int i;
538 char *p = buf.release;
539
540 if (uname (&buf))
541 return 0;
542
543 for (i = 3+1; --i; )
544 {
545 unsigned int c = 0;
546
547 for (;;)
548 {
549 if (*p >= '0' && *p <= '9')
550 c = c * 10 + *p++ - '0';
551 else
552 {
553 p += *p == '.';
554 break;
555 }
556 }
557
558 v = (v << 8) | c;
559 }
560
561 return v;
562#else
563 return 0;
564#endif
565}
566
567/*****************************************************************************/
568
569#if EV_AVOID_STDIO
570static void noinline
571ev_printerr (const char *msg)
572{
573 write (STDERR_FILENO, msg, strlen (msg));
574}
575#endif
576
577static void (*syserr_cb)(const char *msg);
578
579void
580ev_set_syserr_cb (void (*cb)(const char *msg))
581{
582 syserr_cb = cb;
583}
584
585static void noinline
586ev_syserr (const char *msg)
587{
588 if (!msg)
589 msg = "(libev) system error";
590
591 if (syserr_cb)
592 syserr_cb (msg);
593 else
594 {
595#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg);
599 ev_printerr (": ");
600 ev_printerr (err);
601 ev_printerr ("\n");
602#else
603 perror (msg);
604#endif
605 abort ();
606 }
607}
608
609static void *
610ev_realloc_emul (void *ptr, long size)
611{
612#if __GLIBC__
613 return realloc (ptr, size);
614#else
615 /* some systems, notably openbsd and darwin, fail to properly
616 * implement realloc (x, 0) (as required by both ansi c-89 and
617 * the single unix specification, so work around them here.
618 */
619
620 if (size)
621 return realloc (ptr, size);
622
623 free (ptr);
624 return 0;
625#endif
626}
627
628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
629
630void
631ev_set_allocator (void *(*cb)(void *ptr, long size))
632{
633 alloc = cb;
634}
635
636inline_speed void *
637ev_realloc (void *ptr, long size)
638{
639 ptr = alloc (ptr, size);
640
641 if (!ptr && size)
642 {
643#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n");
645#else
646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
647#endif
648 abort ();
649 }
650
651 return ptr;
652}
653
654#define ev_malloc(size) ev_realloc (0, (size))
655#define ev_free(ptr) ev_realloc ((ptr), 0)
656
657/*****************************************************************************/
658
659/* set in reify when reification needed */
660#define EV_ANFD_REIFY 1
661
662/* file descriptor info structure */
663typedef struct
664{
665 WL head;
666 unsigned char events; /* the events watched for */
667 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
668 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
669 unsigned char unused;
670#if EV_USE_EPOLL
671 unsigned int egen; /* generation counter to counter epoll bugs */
672#endif
673#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
674 SOCKET handle;
675#endif
676#if EV_USE_IOCP
677 OVERLAPPED or, ow;
678#endif
679} ANFD;
680
681/* stores the pending event set for a given watcher */
682typedef struct
683{
684 W w;
685 int events; /* the pending event set for the given watcher */
686} ANPENDING;
687
688#if EV_USE_INOTIFY
689/* hash table entry per inotify-id */
690typedef struct
691{
692 WL head;
693} ANFS;
694#endif
695
696/* Heap Entry */
697#if EV_HEAP_CACHE_AT
698 /* a heap element */
699 typedef struct {
700 ev_tstamp at;
701 WT w;
702 } ANHE;
703
704 #define ANHE_w(he) (he).w /* access watcher, read-write */
705 #define ANHE_at(he) (he).at /* access cached at, read-only */
706 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
707#else
708 /* a heap element */
709 typedef WT ANHE;
710
711 #define ANHE_w(he) (he)
712 #define ANHE_at(he) (he)->at
713 #define ANHE_at_cache(he)
714#endif
715
716#if EV_MULTIPLICITY
717
718 struct ev_loop
719 {
720 ev_tstamp ev_rt_now;
721 #define ev_rt_now ((loop)->ev_rt_now)
722 #define VAR(name,decl) decl;
723 #include "ev_vars.h"
724 #undef VAR
725 };
726 #include "ev_wrap.h"
727
728 static struct ev_loop default_loop_struct;
729 struct ev_loop *ev_default_loop_ptr;
730
731#else
732
733 ev_tstamp ev_rt_now;
734 #define VAR(name,decl) static decl;
735 #include "ev_vars.h"
736 #undef VAR
737
738 static int ev_default_loop_ptr;
739
740#endif
741
742#if EV_FEATURE_API
743# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
744# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
745# define EV_INVOKE_PENDING invoke_cb (EV_A)
746#else
747# define EV_RELEASE_CB (void)0
748# define EV_ACQUIRE_CB (void)0
749# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
750#endif
751
752#define EVBREAK_RECURSE 0x80
753
754/*****************************************************************************/
755
756#ifndef EV_HAVE_EV_TIME
130ev_tstamp 757ev_tstamp
131ev_time (void) 758ev_time (void)
132{ 759{
133#if EV_USE_REALTIME 760#if EV_USE_REALTIME
761 if (expect_true (have_realtime))
762 {
134 struct timespec ts; 763 struct timespec ts;
135 clock_gettime (CLOCK_REALTIME, &ts); 764 clock_gettime (CLOCK_REALTIME, &ts);
136 return ts.tv_sec + ts.tv_nsec * 1e-9; 765 return ts.tv_sec + ts.tv_nsec * 1e-9;
137#else 766 }
767#endif
768
138 struct timeval tv; 769 struct timeval tv;
139 gettimeofday (&tv, 0); 770 gettimeofday (&tv, 0);
140 return tv.tv_sec + tv.tv_usec * 1e-6; 771 return tv.tv_sec + tv.tv_usec * 1e-6;
141#endif
142} 772}
773#endif
143 774
144static ev_tstamp 775inline_size ev_tstamp
145get_clock (void) 776get_clock (void)
146{ 777{
147#if EV_USE_MONOTONIC 778#if EV_USE_MONOTONIC
148 if (expect_true (have_monotonic)) 779 if (expect_true (have_monotonic))
149 { 780 {
… …
154#endif 785#endif
155 786
156 return ev_time (); 787 return ev_time ();
157} 788}
158 789
159#define array_roundsize(base,n) ((n) | 4 & ~3) 790#if EV_MULTIPLICITY
791ev_tstamp
792ev_now (EV_P)
793{
794 return ev_rt_now;
795}
796#endif
160 797
161#define array_needsize(base,cur,cnt,init) \ 798void
162 if (expect_false ((cnt) > cur)) \ 799ev_sleep (ev_tstamp delay)
163 { \ 800{
164 int newcnt = cur; \ 801 if (delay > 0.)
165 do \
166 { \
167 newcnt = array_roundsize (base, newcnt << 1); \
168 } \
169 while ((cnt) > newcnt); \
170 \
171 base = realloc (base, sizeof (*base) * (newcnt)); \
172 init (base + cur, newcnt - cur); \
173 cur = newcnt; \
174 } 802 {
803#if EV_USE_NANOSLEEP
804 struct timespec ts;
805
806 EV_TS_SET (ts, delay);
807 nanosleep (&ts, 0);
808#elif defined(_WIN32)
809 Sleep ((unsigned long)(delay * 1e3));
810#else
811 struct timeval tv;
812
813 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
814 /* something not guaranteed by newer posix versions, but guaranteed */
815 /* by older ones */
816 EV_TV_SET (tv, delay);
817 select (0, 0, 0, 0, &tv);
818#endif
819 }
820}
175 821
176/*****************************************************************************/ 822/*****************************************************************************/
177 823
178typedef struct 824#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
179{
180 struct ev_io *head;
181 unsigned char events;
182 unsigned char reify;
183} ANFD;
184 825
185static ANFD *anfds; 826/* find a suitable new size for the given array, */
186static int anfdmax; 827/* hopefully by rounding to a nice-to-malloc size */
187 828inline_size int
188static void 829array_nextsize (int elem, int cur, int cnt)
189anfds_init (ANFD *base, int count)
190{ 830{
191 while (count--) 831 int ncur = cur + 1;
192 {
193 base->head = 0;
194 base->events = EV_NONE;
195 base->reify = 0;
196 832
197 ++base; 833 do
834 ncur <<= 1;
835 while (cnt > ncur);
836
837 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
838 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
198 } 839 {
199} 840 ncur *= elem;
200 841 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
201typedef struct 842 ncur = ncur - sizeof (void *) * 4;
202{ 843 ncur /= elem;
203 W w;
204 int events;
205} ANPENDING;
206
207static ANPENDING *pendings [NUMPRI];
208static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210static void
211event (W w, int events)
212{
213 if (w->pending)
214 { 844 }
845
846 return ncur;
847}
848
849static noinline void *
850array_realloc (int elem, void *base, int *cur, int cnt)
851{
852 *cur = array_nextsize (elem, *cur, cnt);
853 return ev_realloc (base, elem * *cur);
854}
855
856#define array_init_zero(base,count) \
857 memset ((void *)(base), 0, sizeof (*(base)) * (count))
858
859#define array_needsize(type,base,cur,cnt,init) \
860 if (expect_false ((cnt) > (cur))) \
861 { \
862 int ocur_ = (cur); \
863 (base) = (type *)array_realloc \
864 (sizeof (type), (base), &(cur), (cnt)); \
865 init ((base) + (ocur_), (cur) - ocur_); \
866 }
867
868#if 0
869#define array_slim(type,stem) \
870 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
871 { \
872 stem ## max = array_roundsize (stem ## cnt >> 1); \
873 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
874 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
875 }
876#endif
877
878#define array_free(stem, idx) \
879 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
880
881/*****************************************************************************/
882
883/* dummy callback for pending events */
884static void noinline
885pendingcb (EV_P_ ev_prepare *w, int revents)
886{
887}
888
889void noinline
890ev_feed_event (EV_P_ void *w, int revents)
891{
892 W w_ = (W)w;
893 int pri = ABSPRI (w_);
894
895 if (expect_false (w_->pending))
896 pendings [pri][w_->pending - 1].events |= revents;
897 else
898 {
899 w_->pending = ++pendingcnt [pri];
900 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
901 pendings [pri][w_->pending - 1].w = w_;
215 pendings [ABSPRI (w)][w->pending - 1].events |= events; 902 pendings [pri][w_->pending - 1].events = revents;
216 return;
217 } 903 }
218
219 w->pending = ++pendingcnt [ABSPRI (w)];
220 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221 pendings [ABSPRI (w)][w->pending - 1].w = w;
222 pendings [ABSPRI (w)][w->pending - 1].events = events;
223} 904}
224 905
225static void 906inline_speed void
907feed_reverse (EV_P_ W w)
908{
909 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
910 rfeeds [rfeedcnt++] = w;
911}
912
913inline_size void
914feed_reverse_done (EV_P_ int revents)
915{
916 do
917 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
918 while (rfeedcnt);
919}
920
921inline_speed void
226queue_events (W *events, int eventcnt, int type) 922queue_events (EV_P_ W *events, int eventcnt, int type)
227{ 923{
228 int i; 924 int i;
229 925
230 for (i = 0; i < eventcnt; ++i) 926 for (i = 0; i < eventcnt; ++i)
231 event (events [i], type); 927 ev_feed_event (EV_A_ events [i], type);
232} 928}
233 929
234static void 930/*****************************************************************************/
931
932inline_speed void
235fd_event (int fd, int events) 933fd_event_nocheck (EV_P_ int fd, int revents)
236{ 934{
237 ANFD *anfd = anfds + fd; 935 ANFD *anfd = anfds + fd;
238 struct ev_io *w; 936 ev_io *w;
239 937
240 for (w = anfd->head; w; w = w->next) 938 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
241 { 939 {
242 int ev = w->events & events; 940 int ev = w->events & revents;
243 941
244 if (ev) 942 if (ev)
245 event ((W)w, ev); 943 ev_feed_event (EV_A_ (W)w, ev);
246 } 944 }
247} 945}
248 946
249/*****************************************************************************/ 947/* do not submit kernel events for fds that have reify set */
948/* because that means they changed while we were polling for new events */
949inline_speed void
950fd_event (EV_P_ int fd, int revents)
951{
952 ANFD *anfd = anfds + fd;
250 953
251static int *fdchanges; 954 if (expect_true (!anfd->reify))
252static int fdchangemax, fdchangecnt; 955 fd_event_nocheck (EV_A_ fd, revents);
956}
253 957
254static void 958void
255fd_reify (void) 959ev_feed_fd_event (EV_P_ int fd, int revents)
960{
961 if (fd >= 0 && fd < anfdmax)
962 fd_event_nocheck (EV_A_ fd, revents);
963}
964
965/* make sure the external fd watch events are in-sync */
966/* with the kernel/libev internal state */
967inline_size void
968fd_reify (EV_P)
256{ 969{
257 int i; 970 int i;
258 971
259 for (i = 0; i < fdchangecnt; ++i) 972 for (i = 0; i < fdchangecnt; ++i)
260 { 973 {
261 int fd = fdchanges [i]; 974 int fd = fdchanges [i];
262 ANFD *anfd = anfds + fd; 975 ANFD *anfd = anfds + fd;
263 struct ev_io *w; 976 ev_io *w;
264 977
265 int events = 0; 978 unsigned char o_events = anfd->events;
979 unsigned char o_reify = anfd->reify;
266 980
267 for (w = anfd->head; w; w = w->next)
268 events |= w->events;
269
270 anfd->reify = 0; 981 anfd->reify = 0;
271 982
272 if (anfd->events != events) 983#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
984 if (o_reify & EV__IOFDSET)
273 { 985 {
274 method_modify (fd, anfd->events, events); 986 unsigned long arg;
275 anfd->events = events; 987 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
988 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989 printf ("oi %d %x\n", fd, anfd->handle);//D
276 } 990 }
991#endif
992
993 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
994 {
995 anfd->events = 0;
996
997 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
998 anfd->events |= (unsigned char)w->events;
999
1000 if (o_events != anfd->events)
1001 o_reify = EV__IOFDSET; /* actually |= */
1002 }
1003
1004 if (o_reify & EV__IOFDSET)
1005 backend_modify (EV_A_ fd, o_events, anfd->events);
277 } 1006 }
278 1007
279 fdchangecnt = 0; 1008 fdchangecnt = 0;
280} 1009}
281 1010
282static void 1011/* something about the given fd changed */
283fd_change (int fd) 1012inline_size void
1013fd_change (EV_P_ int fd, int flags)
284{ 1014{
285 if (anfds [fd].reify || fdchangecnt < 0) 1015 unsigned char reify = anfds [fd].reify;
286 return;
287
288 anfds [fd].reify = 1; 1016 anfds [fd].reify |= flags;
289 1017
1018 if (expect_true (!reify))
1019 {
290 ++fdchangecnt; 1020 ++fdchangecnt;
291 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1021 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292 fdchanges [fdchangecnt - 1] = fd; 1022 fdchanges [fdchangecnt - 1] = fd;
1023 }
293} 1024}
294 1025
295static void 1026/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027inline_speed void
296fd_kill (int fd) 1028fd_kill (EV_P_ int fd)
297{ 1029{
298 struct ev_io *w; 1030 ev_io *w;
299 1031
300 printf ("killing fd %d\n", fd);//D
301 while ((w = anfds [fd].head)) 1032 while ((w = (ev_io *)anfds [fd].head))
302 { 1033 {
303 ev_io_stop (w); 1034 ev_io_stop (EV_A_ w);
304 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 1035 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
305 } 1036 }
1037}
1038
1039/* check whether the given fd is actually valid, for error recovery */
1040inline_size int
1041fd_valid (int fd)
1042{
1043#ifdef _WIN32
1044 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1045#else
1046 return fcntl (fd, F_GETFD) != -1;
1047#endif
306} 1048}
307 1049
308/* called on EBADF to verify fds */ 1050/* called on EBADF to verify fds */
309static void 1051static void noinline
310fd_ebadf (void) 1052fd_ebadf (EV_P)
311{ 1053{
312 int fd; 1054 int fd;
313 1055
314 for (fd = 0; fd < anfdmax; ++fd) 1056 for (fd = 0; fd < anfdmax; ++fd)
315 if (anfds [fd].events) 1057 if (anfds [fd].events)
316 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1058 if (!fd_valid (fd) && errno == EBADF)
317 fd_kill (fd); 1059 fd_kill (EV_A_ fd);
318} 1060}
319 1061
320/* called on ENOMEM in select/poll to kill some fds and retry */ 1062/* called on ENOMEM in select/poll to kill some fds and retry */
321static void 1063static void noinline
322fd_enomem (void) 1064fd_enomem (EV_P)
323{ 1065{
324 int fd = anfdmax; 1066 int fd;
325 1067
326 while (fd--) 1068 for (fd = anfdmax; fd--; )
327 if (anfds [fd].events) 1069 if (anfds [fd].events)
328 { 1070 {
329 close (fd);
330 fd_kill (fd); 1071 fd_kill (EV_A_ fd);
331 return; 1072 break;
332 } 1073 }
333} 1074}
334 1075
1076/* usually called after fork if backend needs to re-arm all fds from scratch */
1077static void noinline
1078fd_rearm_all (EV_P)
1079{
1080 int fd;
1081
1082 for (fd = 0; fd < anfdmax; ++fd)
1083 if (anfds [fd].events)
1084 {
1085 anfds [fd].events = 0;
1086 anfds [fd].emask = 0;
1087 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1088 }
1089}
1090
1091/* used to prepare libev internal fd's */
1092/* this is not fork-safe */
1093inline_speed void
1094fd_intern (int fd)
1095{
1096#ifdef _WIN32
1097 unsigned long arg = 1;
1098 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1099#else
1100 fcntl (fd, F_SETFD, FD_CLOEXEC);
1101 fcntl (fd, F_SETFL, O_NONBLOCK);
1102#endif
1103}
1104
335/*****************************************************************************/ 1105/*****************************************************************************/
336 1106
337static struct ev_timer **timers; 1107/*
338static int timermax, timercnt; 1108 * the heap functions want a real array index. array index 0 is guaranteed to not
1109 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1110 * the branching factor of the d-tree.
1111 */
339 1112
340static struct ev_periodic **periodics; 1113/*
341static int periodicmax, periodiccnt; 1114 * at the moment we allow libev the luxury of two heaps,
1115 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1116 * which is more cache-efficient.
1117 * the difference is about 5% with 50000+ watchers.
1118 */
1119#if EV_USE_4HEAP
342 1120
1121#define DHEAP 4
1122#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1123#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1124#define UPHEAP_DONE(p,k) ((p) == (k))
1125
1126/* away from the root */
1127inline_speed void
1128downheap (ANHE *heap, int N, int k)
1129{
1130 ANHE he = heap [k];
1131 ANHE *E = heap + N + HEAP0;
1132
1133 for (;;)
1134 {
1135 ev_tstamp minat;
1136 ANHE *minpos;
1137 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1138
1139 /* find minimum child */
1140 if (expect_true (pos + DHEAP - 1 < E))
1141 {
1142 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1143 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1144 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1145 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1146 }
1147 else if (pos < E)
1148 {
1149 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1150 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1151 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1152 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1153 }
1154 else
1155 break;
1156
1157 if (ANHE_at (he) <= minat)
1158 break;
1159
1160 heap [k] = *minpos;
1161 ev_active (ANHE_w (*minpos)) = k;
1162
1163 k = minpos - heap;
1164 }
1165
1166 heap [k] = he;
1167 ev_active (ANHE_w (he)) = k;
1168}
1169
1170#else /* 4HEAP */
1171
1172#define HEAP0 1
1173#define HPARENT(k) ((k) >> 1)
1174#define UPHEAP_DONE(p,k) (!(p))
1175
1176/* away from the root */
1177inline_speed void
1178downheap (ANHE *heap, int N, int k)
1179{
1180 ANHE he = heap [k];
1181
1182 for (;;)
1183 {
1184 int c = k << 1;
1185
1186 if (c >= N + HEAP0)
1187 break;
1188
1189 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1190 ? 1 : 0;
1191
1192 if (ANHE_at (he) <= ANHE_at (heap [c]))
1193 break;
1194
1195 heap [k] = heap [c];
1196 ev_active (ANHE_w (heap [k])) = k;
1197
1198 k = c;
1199 }
1200
1201 heap [k] = he;
1202 ev_active (ANHE_w (he)) = k;
1203}
1204#endif
1205
1206/* towards the root */
1207inline_speed void
1208upheap (ANHE *heap, int k)
1209{
1210 ANHE he = heap [k];
1211
1212 for (;;)
1213 {
1214 int p = HPARENT (k);
1215
1216 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1217 break;
1218
1219 heap [k] = heap [p];
1220 ev_active (ANHE_w (heap [k])) = k;
1221 k = p;
1222 }
1223
1224 heap [k] = he;
1225 ev_active (ANHE_w (he)) = k;
1226}
1227
1228/* move an element suitably so it is in a correct place */
1229inline_size void
1230adjustheap (ANHE *heap, int N, int k)
1231{
1232 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1233 upheap (heap, k);
1234 else
1235 downheap (heap, N, k);
1236}
1237
1238/* rebuild the heap: this function is used only once and executed rarely */
1239inline_size void
1240reheap (ANHE *heap, int N)
1241{
1242 int i;
1243
1244 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1245 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1246 for (i = 0; i < N; ++i)
1247 upheap (heap, i + HEAP0);
1248}
1249
1250/*****************************************************************************/
1251
1252/* associate signal watchers to a signal signal */
1253typedef struct
1254{
1255 EV_ATOMIC_T pending;
1256#if EV_MULTIPLICITY
1257 EV_P;
1258#endif
1259 WL head;
1260} ANSIG;
1261
1262static ANSIG signals [EV_NSIG - 1];
1263
1264/*****************************************************************************/
1265
1266#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1267
1268static void noinline
1269evpipe_init (EV_P)
1270{
1271 if (!ev_is_active (&pipe_w))
1272 {
1273# if EV_USE_EVENTFD
1274 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1275 if (evfd < 0 && errno == EINVAL)
1276 evfd = eventfd (0, 0);
1277
1278 if (evfd >= 0)
1279 {
1280 evpipe [0] = -1;
1281 fd_intern (evfd); /* doing it twice doesn't hurt */
1282 ev_io_set (&pipe_w, evfd, EV_READ);
1283 }
1284 else
1285# endif
1286 {
1287 while (pipe (evpipe))
1288 ev_syserr ("(libev) error creating signal/async pipe");
1289
1290 fd_intern (evpipe [0]);
1291 fd_intern (evpipe [1]);
1292 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1293 }
1294
1295 ev_io_start (EV_A_ &pipe_w);
1296 ev_unref (EV_A); /* watcher should not keep loop alive */
1297 }
1298}
1299
1300inline_size void
1301evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302{
1303 if (!*flag)
1304 {
1305 int old_errno = errno; /* save errno because write might clobber it */
1306 char dummy;
1307
1308 *flag = 1;
1309
1310#if EV_USE_EVENTFD
1311 if (evfd >= 0)
1312 {
1313 uint64_t counter = 1;
1314 write (evfd, &counter, sizeof (uint64_t));
1315 }
1316 else
1317#endif
1318 /* win32 people keep sending patches that change this write() to send() */
1319 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320 /* so when you think this write should be a send instead, please find out */
1321 /* where your send() is from - it's definitely not the microsoft send, and */
1322 /* tell me. thank you. */
1323 write (evpipe [1], &dummy, 1);
1324
1325 errno = old_errno;
1326 }
1327}
1328
1329/* called whenever the libev signal pipe */
1330/* got some events (signal, async) */
343static void 1331static void
344upheap (WT *timers, int k) 1332pipecb (EV_P_ ev_io *iow, int revents)
345{ 1333{
346 WT w = timers [k]; 1334 int i;
347 1335
348 while (k && timers [k >> 1]->at > w->at) 1336#if EV_USE_EVENTFD
349 { 1337 if (evfd >= 0)
350 timers [k] = timers [k >> 1];
351 timers [k]->active = k + 1;
352 k >>= 1;
353 } 1338 {
1339 uint64_t counter;
1340 read (evfd, &counter, sizeof (uint64_t));
1341 }
1342 else
1343#endif
1344 {
1345 char dummy;
1346 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1347 read (evpipe [0], &dummy, 1);
1348 }
354 1349
355 timers [k] = w; 1350 if (sig_pending)
356 timers [k]->active = k + 1; 1351 {
1352 sig_pending = 0;
357 1353
1354 for (i = EV_NSIG - 1; i--; )
1355 if (expect_false (signals [i].pending))
1356 ev_feed_signal_event (EV_A_ i + 1);
1357 }
1358
1359#if EV_ASYNC_ENABLE
1360 if (async_pending)
1361 {
1362 async_pending = 0;
1363
1364 for (i = asynccnt; i--; )
1365 if (asyncs [i]->sent)
1366 {
1367 asyncs [i]->sent = 0;
1368 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1369 }
1370 }
1371#endif
358} 1372}
1373
1374/*****************************************************************************/
359 1375
360static void 1376static void
361downheap (WT *timers, int N, int k) 1377ev_sighandler (int signum)
362{ 1378{
363 WT w = timers [k]; 1379#if EV_MULTIPLICITY
1380 EV_P = signals [signum - 1].loop;
1381#endif
364 1382
365 while (k < (N >> 1)) 1383#ifdef _WIN32
366 { 1384 signal (signum, ev_sighandler);
367 int j = k << 1; 1385#endif
368 1386
369 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1387 signals [signum - 1].pending = 1;
370 ++j; 1388 evpipe_write (EV_A_ &sig_pending);
1389}
371 1390
372 if (w->at <= timers [j]->at) 1391void noinline
1392ev_feed_signal_event (EV_P_ int signum)
1393{
1394 WL w;
1395
1396 if (expect_false (signum <= 0 || signum > EV_NSIG))
1397 return;
1398
1399 --signum;
1400
1401#if EV_MULTIPLICITY
1402 /* it is permissible to try to feed a signal to the wrong loop */
1403 /* or, likely more useful, feeding a signal nobody is waiting for */
1404
1405 if (expect_false (signals [signum].loop != EV_A))
1406 return;
1407#endif
1408
1409 signals [signum].pending = 0;
1410
1411 for (w = signals [signum].head; w; w = w->next)
1412 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1413}
1414
1415#if EV_USE_SIGNALFD
1416static void
1417sigfdcb (EV_P_ ev_io *iow, int revents)
1418{
1419 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1420
1421 for (;;)
1422 {
1423 ssize_t res = read (sigfd, si, sizeof (si));
1424
1425 /* not ISO-C, as res might be -1, but works with SuS */
1426 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1427 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1428
1429 if (res < (ssize_t)sizeof (si))
373 break; 1430 break;
374
375 timers [k] = timers [j];
376 timers [k]->active = k + 1;
377 k = j;
378 } 1431 }
379
380 timers [k] = w;
381 timers [k]->active = k + 1;
382} 1432}
1433#endif
1434
1435#endif
383 1436
384/*****************************************************************************/ 1437/*****************************************************************************/
385 1438
386typedef struct 1439#if EV_CHILD_ENABLE
387{ 1440static WL childs [EV_PID_HASHSIZE];
388 struct ev_signal *head;
389 sig_atomic_t volatile gotsig;
390} ANSIG;
391 1441
392static ANSIG *signals;
393static int signalmax;
394
395static int sigpipe [2];
396static sig_atomic_t volatile gotsig;
397static struct ev_io sigev;
398
399static void
400signals_init (ANSIG *base, int count)
401{
402 while (count--)
403 {
404 base->head = 0;
405 base->gotsig = 0;
406
407 ++base;
408 }
409}
410
411static void
412sighandler (int signum)
413{
414 signals [signum - 1].gotsig = 1;
415
416 if (!gotsig)
417 {
418 gotsig = 1;
419 write (sigpipe [1], &signum, 1);
420 }
421}
422
423static void
424sigcb (struct ev_io *iow, int revents)
425{
426 struct ev_signal *w;
427 int signum;
428
429 read (sigpipe [0], &revents, 1);
430 gotsig = 0;
431
432 for (signum = signalmax; signum--; )
433 if (signals [signum].gotsig)
434 {
435 signals [signum].gotsig = 0;
436
437 for (w = signals [signum].head; w; w = w->next)
438 event ((W)w, EV_SIGNAL);
439 }
440}
441
442static void
443siginit (void)
444{
445#ifndef WIN32
446 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
447 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
448
449 /* rather than sort out wether we really need nb, set it */
450 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
451 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
452#endif
453
454 ev_io_set (&sigev, sigpipe [0], EV_READ);
455 ev_io_start (&sigev);
456}
457
458/*****************************************************************************/
459
460static struct ev_idle **idles;
461static int idlemax, idlecnt;
462
463static struct ev_prepare **prepares;
464static int preparemax, preparecnt;
465
466static struct ev_check **checks;
467static int checkmax, checkcnt;
468
469/*****************************************************************************/
470
471static struct ev_child *childs [PID_HASHSIZE];
472static struct ev_signal childev; 1442static ev_signal childev;
473 1443
474#ifndef WIN32 1444#ifndef WIFCONTINUED
1445# define WIFCONTINUED(status) 0
1446#endif
1447
1448/* handle a single child status event */
1449inline_speed void
1450child_reap (EV_P_ int chain, int pid, int status)
1451{
1452 ev_child *w;
1453 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1454
1455 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1456 {
1457 if ((w->pid == pid || !w->pid)
1458 && (!traced || (w->flags & 1)))
1459 {
1460 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1461 w->rpid = pid;
1462 w->rstatus = status;
1463 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1464 }
1465 }
1466}
475 1467
476#ifndef WCONTINUED 1468#ifndef WCONTINUED
477# define WCONTINUED 0 1469# define WCONTINUED 0
478#endif 1470#endif
479 1471
1472/* called on sigchld etc., calls waitpid */
480static void 1473static void
481childcb (struct ev_signal *sw, int revents) 1474childcb (EV_P_ ev_signal *sw, int revents)
482{ 1475{
483 struct ev_child *w;
484 int pid, status; 1476 int pid, status;
485 1477
1478 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
486 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1479 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
487 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1480 if (!WCONTINUED
488 if (w->pid == pid || !w->pid) 1481 || errno != EINVAL
489 { 1482 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
490 w->rpid = pid; 1483 return;
491 w->rstatus = status; 1484
492 event ((W)w, EV_CHILD); 1485 /* make sure we are called again until all children have been reaped */
493 } 1486 /* we need to do it this way so that the callback gets called before we continue */
1487 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1488
1489 child_reap (EV_A_ pid, pid, status);
1490 if ((EV_PID_HASHSIZE) > 1)
1491 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
494} 1492}
495 1493
496#endif 1494#endif
497 1495
498/*****************************************************************************/ 1496/*****************************************************************************/
499 1497
1498#if EV_USE_IOCP
1499# include "ev_iocp.c"
1500#endif
1501#if EV_USE_PORT
1502# include "ev_port.c"
1503#endif
500#if EV_USE_KQUEUE 1504#if EV_USE_KQUEUE
501# include "ev_kqueue.c" 1505# include "ev_kqueue.c"
502#endif 1506#endif
503#if EV_USE_EPOLL 1507#if EV_USE_EPOLL
504# include "ev_epoll.c" 1508# include "ev_epoll.c"
… …
520ev_version_minor (void) 1524ev_version_minor (void)
521{ 1525{
522 return EV_VERSION_MINOR; 1526 return EV_VERSION_MINOR;
523} 1527}
524 1528
525/* return true if we are running with elevated privileges and ignore env variables */ 1529/* return true if we are running with elevated privileges and should ignore env variables */
526static int 1530int inline_size
527enable_secure () 1531enable_secure (void)
528{ 1532{
1533#ifdef _WIN32
1534 return 0;
1535#else
529 return getuid () != geteuid () 1536 return getuid () != geteuid ()
530 || getgid () != getegid (); 1537 || getgid () != getegid ();
1538#endif
531} 1539}
532 1540
533int ev_init (int methods) 1541unsigned int
1542ev_supported_backends (void)
534{ 1543{
535 if (!ev_method) 1544 unsigned int flags = 0;
1545
1546 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1547 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1548 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1549 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1550 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1551
1552 return flags;
1553}
1554
1555unsigned int
1556ev_recommended_backends (void)
1557{
1558 unsigned int flags = ev_supported_backends ();
1559
1560#ifndef __NetBSD__
1561 /* kqueue is borked on everything but netbsd apparently */
1562 /* it usually doesn't work correctly on anything but sockets and pipes */
1563 flags &= ~EVBACKEND_KQUEUE;
1564#endif
1565#ifdef __APPLE__
1566 /* only select works correctly on that "unix-certified" platform */
1567 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1568 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1569#endif
1570#ifdef __FreeBSD__
1571 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1572#endif
1573
1574 return flags;
1575}
1576
1577unsigned int
1578ev_embeddable_backends (void)
1579{
1580 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1581
1582 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1583 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1584 flags &= ~EVBACKEND_EPOLL;
1585
1586 return flags;
1587}
1588
1589unsigned int
1590ev_backend (EV_P)
1591{
1592 return backend;
1593}
1594
1595#if EV_FEATURE_API
1596unsigned int
1597ev_iteration (EV_P)
1598{
1599 return loop_count;
1600}
1601
1602unsigned int
1603ev_depth (EV_P)
1604{
1605 return loop_depth;
1606}
1607
1608void
1609ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1610{
1611 io_blocktime = interval;
1612}
1613
1614void
1615ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1616{
1617 timeout_blocktime = interval;
1618}
1619
1620void
1621ev_set_userdata (EV_P_ void *data)
1622{
1623 userdata = data;
1624}
1625
1626void *
1627ev_userdata (EV_P)
1628{
1629 return userdata;
1630}
1631
1632void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1633{
1634 invoke_cb = invoke_pending_cb;
1635}
1636
1637void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1638{
1639 release_cb = release;
1640 acquire_cb = acquire;
1641}
1642#endif
1643
1644/* initialise a loop structure, must be zero-initialised */
1645static void noinline
1646loop_init (EV_P_ unsigned int flags)
1647{
1648 if (!backend)
536 { 1649 {
1650#if EV_USE_REALTIME
1651 if (!have_realtime)
1652 {
1653 struct timespec ts;
1654
1655 if (!clock_gettime (CLOCK_REALTIME, &ts))
1656 have_realtime = 1;
1657 }
1658#endif
1659
537#if EV_USE_MONOTONIC 1660#if EV_USE_MONOTONIC
1661 if (!have_monotonic)
1662 {
1663 struct timespec ts;
1664
1665 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1666 have_monotonic = 1;
1667 }
1668#endif
1669
1670 /* pid check not overridable via env */
1671#ifndef _WIN32
1672 if (flags & EVFLAG_FORKCHECK)
1673 curpid = getpid ();
1674#endif
1675
1676 if (!(flags & EVFLAG_NOENV)
1677 && !enable_secure ()
1678 && getenv ("LIBEV_FLAGS"))
1679 flags = atoi (getenv ("LIBEV_FLAGS"));
1680
1681 ev_rt_now = ev_time ();
1682 mn_now = get_clock ();
1683 now_floor = mn_now;
1684 rtmn_diff = ev_rt_now - mn_now;
1685#if EV_FEATURE_API
1686 invoke_cb = ev_invoke_pending;
1687#endif
1688
1689 io_blocktime = 0.;
1690 timeout_blocktime = 0.;
1691 backend = 0;
1692 backend_fd = -1;
1693 sig_pending = 0;
1694#if EV_ASYNC_ENABLE
1695 async_pending = 0;
1696#endif
1697#if EV_USE_INOTIFY
1698 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699#endif
1700#if EV_USE_SIGNALFD
1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702#endif
1703
1704 if (!(flags & 0x0000ffffU))
1705 flags |= ev_recommended_backends ();
1706
1707#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif
1710#if EV_USE_PORT
1711 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1712#endif
1713#if EV_USE_KQUEUE
1714 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1715#endif
1716#if EV_USE_EPOLL
1717 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1718#endif
1719#if EV_USE_POLL
1720 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1721#endif
1722#if EV_USE_SELECT
1723 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1724#endif
1725
1726 ev_prepare_init (&pending_w, pendingcb);
1727
1728#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1729 ev_init (&pipe_w, pipecb);
1730 ev_set_priority (&pipe_w, EV_MAXPRI);
1731#endif
1732 }
1733}
1734
1735/* free up a loop structure */
1736static void noinline
1737loop_destroy (EV_P)
1738{
1739 int i;
1740
1741 if (ev_is_active (&pipe_w))
1742 {
1743 /*ev_ref (EV_A);*/
1744 /*ev_io_stop (EV_A_ &pipe_w);*/
1745
1746#if EV_USE_EVENTFD
1747 if (evfd >= 0)
1748 close (evfd);
1749#endif
1750
1751 if (evpipe [0] >= 0)
1752 {
1753 EV_WIN32_CLOSE_FD (evpipe [0]);
1754 EV_WIN32_CLOSE_FD (evpipe [1]);
1755 }
1756 }
1757
1758#if EV_USE_SIGNALFD
1759 if (ev_is_active (&sigfd_w))
1760 close (sigfd);
1761#endif
1762
1763#if EV_USE_INOTIFY
1764 if (fs_fd >= 0)
1765 close (fs_fd);
1766#endif
1767
1768 if (backend_fd >= 0)
1769 close (backend_fd);
1770
1771#if EV_USE_IOCP
1772 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1773#endif
1774#if EV_USE_PORT
1775 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1776#endif
1777#if EV_USE_KQUEUE
1778 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1779#endif
1780#if EV_USE_EPOLL
1781 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1782#endif
1783#if EV_USE_POLL
1784 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1785#endif
1786#if EV_USE_SELECT
1787 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1788#endif
1789
1790 for (i = NUMPRI; i--; )
1791 {
1792 array_free (pending, [i]);
1793#if EV_IDLE_ENABLE
1794 array_free (idle, [i]);
1795#endif
1796 }
1797
1798 ev_free (anfds); anfds = 0; anfdmax = 0;
1799
1800 /* have to use the microsoft-never-gets-it-right macro */
1801 array_free (rfeed, EMPTY);
1802 array_free (fdchange, EMPTY);
1803 array_free (timer, EMPTY);
1804#if EV_PERIODIC_ENABLE
1805 array_free (periodic, EMPTY);
1806#endif
1807#if EV_FORK_ENABLE
1808 array_free (fork, EMPTY);
1809#endif
1810 array_free (prepare, EMPTY);
1811 array_free (check, EMPTY);
1812#if EV_ASYNC_ENABLE
1813 array_free (async, EMPTY);
1814#endif
1815
1816 backend = 0;
1817}
1818
1819#if EV_USE_INOTIFY
1820inline_size void infy_fork (EV_P);
1821#endif
1822
1823inline_size void
1824loop_fork (EV_P)
1825{
1826#if EV_USE_PORT
1827 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1828#endif
1829#if EV_USE_KQUEUE
1830 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1831#endif
1832#if EV_USE_EPOLL
1833 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1834#endif
1835#if EV_USE_INOTIFY
1836 infy_fork (EV_A);
1837#endif
1838
1839 if (ev_is_active (&pipe_w))
1840 {
1841 /* this "locks" the handlers against writing to the pipe */
1842 /* while we modify the fd vars */
1843 sig_pending = 1;
1844#if EV_ASYNC_ENABLE
1845 async_pending = 1;
1846#endif
1847
1848 ev_ref (EV_A);
1849 ev_io_stop (EV_A_ &pipe_w);
1850
1851#if EV_USE_EVENTFD
1852 if (evfd >= 0)
1853 close (evfd);
1854#endif
1855
1856 if (evpipe [0] >= 0)
1857 {
1858 EV_WIN32_CLOSE_FD (evpipe [0]);
1859 EV_WIN32_CLOSE_FD (evpipe [1]);
1860 }
1861
1862#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1863 evpipe_init (EV_A);
1864 /* now iterate over everything, in case we missed something */
1865 pipecb (EV_A_ &pipe_w, EV_READ);
1866#endif
1867 }
1868
1869 postfork = 0;
1870}
1871
1872#if EV_MULTIPLICITY
1873
1874struct ev_loop *
1875ev_loop_new (unsigned int flags)
1876{
1877 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1878
1879 memset (EV_A, 0, sizeof (struct ev_loop));
1880 loop_init (EV_A_ flags);
1881
1882 if (ev_backend (EV_A))
1883 return EV_A;
1884
1885 return 0;
1886}
1887
1888void
1889ev_loop_destroy (EV_P)
1890{
1891 loop_destroy (EV_A);
1892 ev_free (loop);
1893}
1894
1895void
1896ev_loop_fork (EV_P)
1897{
1898 postfork = 1; /* must be in line with ev_default_fork */
1899}
1900#endif /* multiplicity */
1901
1902#if EV_VERIFY
1903static void noinline
1904verify_watcher (EV_P_ W w)
1905{
1906 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1907
1908 if (w->pending)
1909 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1910}
1911
1912static void noinline
1913verify_heap (EV_P_ ANHE *heap, int N)
1914{
1915 int i;
1916
1917 for (i = HEAP0; i < N + HEAP0; ++i)
1918 {
1919 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1920 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1921 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1922
1923 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1924 }
1925}
1926
1927static void noinline
1928array_verify (EV_P_ W *ws, int cnt)
1929{
1930 while (cnt--)
1931 {
1932 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1933 verify_watcher (EV_A_ ws [cnt]);
1934 }
1935}
1936#endif
1937
1938#if EV_FEATURE_API
1939void
1940ev_verify (EV_P)
1941{
1942#if EV_VERIFY
1943 int i;
1944 WL w;
1945
1946 assert (activecnt >= -1);
1947
1948 assert (fdchangemax >= fdchangecnt);
1949 for (i = 0; i < fdchangecnt; ++i)
1950 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1951
1952 assert (anfdmax >= 0);
1953 for (i = 0; i < anfdmax; ++i)
1954 for (w = anfds [i].head; w; w = w->next)
538 { 1955 {
539 struct timespec ts; 1956 verify_watcher (EV_A_ (W)w);
540 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1957 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
541 have_monotonic = 1; 1958 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
542 } 1959 }
1960
1961 assert (timermax >= timercnt);
1962 verify_heap (EV_A_ timers, timercnt);
1963
1964#if EV_PERIODIC_ENABLE
1965 assert (periodicmax >= periodiccnt);
1966 verify_heap (EV_A_ periodics, periodiccnt);
1967#endif
1968
1969 for (i = NUMPRI; i--; )
1970 {
1971 assert (pendingmax [i] >= pendingcnt [i]);
1972#if EV_IDLE_ENABLE
1973 assert (idleall >= 0);
1974 assert (idlemax [i] >= idlecnt [i]);
1975 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1976#endif
1977 }
1978
1979#if EV_FORK_ENABLE
1980 assert (forkmax >= forkcnt);
1981 array_verify (EV_A_ (W *)forks, forkcnt);
1982#endif
1983
1984#if EV_ASYNC_ENABLE
1985 assert (asyncmax >= asynccnt);
1986 array_verify (EV_A_ (W *)asyncs, asynccnt);
1987#endif
1988
1989#if EV_PREPARE_ENABLE
1990 assert (preparemax >= preparecnt);
1991 array_verify (EV_A_ (W *)prepares, preparecnt);
1992#endif
1993
1994#if EV_CHECK_ENABLE
1995 assert (checkmax >= checkcnt);
1996 array_verify (EV_A_ (W *)checks, checkcnt);
1997#endif
1998
1999# if 0
2000#if EV_CHILD_ENABLE
2001 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2002 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2003#endif
543#endif 2004# endif
544
545 ev_now = ev_time ();
546 now = get_clock ();
547 now_floor = now;
548 diff = ev_now - now;
549
550 if (pipe (sigpipe))
551 return 0;
552
553 if (methods == EVMETHOD_AUTO)
554 if (!enable_secure () && getenv ("LIBEV_METHODS"))
555 methods = atoi (getenv ("LIBEV_METHODS"));
556 else
557 methods = EVMETHOD_ANY;
558
559 ev_method = 0;
560#if EV_USE_KQUEUE
561 if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
562#endif 2005#endif
563#if EV_USE_EPOLL 2006}
564 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
565#endif 2007#endif
566#if EV_USE_POLL
567 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
568#endif
569#if EV_USE_SELECT
570 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
571#endif
572 2008
573 if (ev_method) 2009#if EV_MULTIPLICITY
2010struct ev_loop *
2011ev_default_loop_init (unsigned int flags)
2012#else
2013int
2014ev_default_loop (unsigned int flags)
2015#endif
2016{
2017 if (!ev_default_loop_ptr)
2018 {
2019#if EV_MULTIPLICITY
2020 EV_P = ev_default_loop_ptr = &default_loop_struct;
2021#else
2022 ev_default_loop_ptr = 1;
2023#endif
2024
2025 loop_init (EV_A_ flags);
2026
2027 if (ev_backend (EV_A))
574 { 2028 {
575 ev_watcher_init (&sigev, sigcb); 2029#if EV_CHILD_ENABLE
576 siginit ();
577
578#ifndef WIN32
579 ev_signal_init (&childev, childcb, SIGCHLD); 2030 ev_signal_init (&childev, childcb, SIGCHLD);
2031 ev_set_priority (&childev, EV_MAXPRI);
580 ev_signal_start (&childev); 2032 ev_signal_start (EV_A_ &childev);
2033 ev_unref (EV_A); /* child watcher should not keep loop alive */
581#endif 2034#endif
582 } 2035 }
2036 else
2037 ev_default_loop_ptr = 0;
583 } 2038 }
584 2039
585 return ev_method; 2040 return ev_default_loop_ptr;
2041}
2042
2043void
2044ev_default_destroy (void)
2045{
2046#if EV_MULTIPLICITY
2047 EV_P = ev_default_loop_ptr;
2048#endif
2049
2050 ev_default_loop_ptr = 0;
2051
2052#if EV_CHILD_ENABLE
2053 ev_ref (EV_A); /* child watcher */
2054 ev_signal_stop (EV_A_ &childev);
2055#endif
2056
2057 loop_destroy (EV_A);
2058}
2059
2060void
2061ev_default_fork (void)
2062{
2063#if EV_MULTIPLICITY
2064 EV_P = ev_default_loop_ptr;
2065#endif
2066
2067 postfork = 1; /* must be in line with ev_loop_fork */
586} 2068}
587 2069
588/*****************************************************************************/ 2070/*****************************************************************************/
589 2071
590void 2072void
591ev_fork_prepare (void) 2073ev_invoke (EV_P_ void *w, int revents)
592{ 2074{
593 /* nop */ 2075 EV_CB_INVOKE ((W)w, revents);
594} 2076}
595 2077
596void 2078unsigned int
597ev_fork_parent (void) 2079ev_pending_count (EV_P)
598{ 2080{
599 /* nop */ 2081 int pri;
600} 2082 unsigned int count = 0;
601 2083
602void 2084 for (pri = NUMPRI; pri--; )
603ev_fork_child (void) 2085 count += pendingcnt [pri];
604{
605#if EV_USE_EPOLL
606 if (ev_method == EVMETHOD_EPOLL)
607 epoll_postfork_child ();
608#endif
609 2086
610 ev_io_stop (&sigev); 2087 return count;
611 close (sigpipe [0]);
612 close (sigpipe [1]);
613 pipe (sigpipe);
614 siginit ();
615} 2088}
616 2089
617/*****************************************************************************/ 2090void noinline
618 2091ev_invoke_pending (EV_P)
619static void
620call_pending (void)
621{ 2092{
622 int pri; 2093 int pri;
623 2094
624 for (pri = NUMPRI; pri--; ) 2095 for (pri = NUMPRI; pri--; )
625 while (pendingcnt [pri]) 2096 while (pendingcnt [pri])
626 { 2097 {
627 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2098 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
628 2099
629 if (p->w) 2100 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2101 /* ^ this is no longer true, as pending_w could be here */
2102
2103 p->w->pending = 0;
2104 EV_CB_INVOKE (p->w, p->events);
2105 EV_FREQUENT_CHECK;
2106 }
2107}
2108
2109#if EV_IDLE_ENABLE
2110/* make idle watchers pending. this handles the "call-idle */
2111/* only when higher priorities are idle" logic */
2112inline_size void
2113idle_reify (EV_P)
2114{
2115 if (expect_false (idleall))
2116 {
2117 int pri;
2118
2119 for (pri = NUMPRI; pri--; )
2120 {
2121 if (pendingcnt [pri])
2122 break;
2123
2124 if (idlecnt [pri])
2125 {
2126 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2127 break;
2128 }
2129 }
2130 }
2131}
2132#endif
2133
2134/* make timers pending */
2135inline_size void
2136timers_reify (EV_P)
2137{
2138 EV_FREQUENT_CHECK;
2139
2140 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2141 {
2142 do
2143 {
2144 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2145
2146 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2147
2148 /* first reschedule or stop timer */
2149 if (w->repeat)
2150 {
2151 ev_at (w) += w->repeat;
2152 if (ev_at (w) < mn_now)
2153 ev_at (w) = mn_now;
2154
2155 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2156
2157 ANHE_at_cache (timers [HEAP0]);
2158 downheap (timers, timercnt, HEAP0);
2159 }
2160 else
2161 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2162
2163 EV_FREQUENT_CHECK;
2164 feed_reverse (EV_A_ (W)w);
2165 }
2166 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2167
2168 feed_reverse_done (EV_A_ EV_TIMER);
2169 }
2170}
2171
2172#if EV_PERIODIC_ENABLE
2173/* make periodics pending */
2174inline_size void
2175periodics_reify (EV_P)
2176{
2177 EV_FREQUENT_CHECK;
2178
2179 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2180 {
2181 int feed_count = 0;
2182
2183 do
2184 {
2185 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2186
2187 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2188
2189 /* first reschedule or stop timer */
2190 if (w->reschedule_cb)
2191 {
2192 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2193
2194 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2195
2196 ANHE_at_cache (periodics [HEAP0]);
2197 downheap (periodics, periodiccnt, HEAP0);
2198 }
2199 else if (w->interval)
2200 {
2201 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2202 /* if next trigger time is not sufficiently in the future, put it there */
2203 /* this might happen because of floating point inexactness */
2204 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2205 {
2206 ev_at (w) += w->interval;
2207
2208 /* if interval is unreasonably low we might still have a time in the past */
2209 /* so correct this. this will make the periodic very inexact, but the user */
2210 /* has effectively asked to get triggered more often than possible */
2211 if (ev_at (w) < ev_rt_now)
2212 ev_at (w) = ev_rt_now;
2213 }
2214
2215 ANHE_at_cache (periodics [HEAP0]);
2216 downheap (periodics, periodiccnt, HEAP0);
2217 }
2218 else
2219 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2220
2221 EV_FREQUENT_CHECK;
2222 feed_reverse (EV_A_ (W)w);
2223 }
2224 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2225
2226 feed_reverse_done (EV_A_ EV_PERIODIC);
2227 }
2228}
2229
2230/* simply recalculate all periodics */
2231/* TODO: maybe ensure that at least one event happens when jumping forward? */
2232static void noinline
2233periodics_reschedule (EV_P)
2234{
2235 int i;
2236
2237 /* adjust periodics after time jump */
2238 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2239 {
2240 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2241
2242 if (w->reschedule_cb)
2243 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2244 else if (w->interval)
2245 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2246
2247 ANHE_at_cache (periodics [i]);
2248 }
2249
2250 reheap (periodics, periodiccnt);
2251}
2252#endif
2253
2254/* adjust all timers by a given offset */
2255static void noinline
2256timers_reschedule (EV_P_ ev_tstamp adjust)
2257{
2258 int i;
2259
2260 for (i = 0; i < timercnt; ++i)
2261 {
2262 ANHE *he = timers + i + HEAP0;
2263 ANHE_w (*he)->at += adjust;
2264 ANHE_at_cache (*he);
2265 }
2266}
2267
2268/* fetch new monotonic and realtime times from the kernel */
2269/* also detect if there was a timejump, and act accordingly */
2270inline_speed void
2271time_update (EV_P_ ev_tstamp max_block)
2272{
2273#if EV_USE_MONOTONIC
2274 if (expect_true (have_monotonic))
2275 {
2276 int i;
2277 ev_tstamp odiff = rtmn_diff;
2278
2279 mn_now = get_clock ();
2280
2281 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2282 /* interpolate in the meantime */
2283 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2284 {
2285 ev_rt_now = rtmn_diff + mn_now;
2286 return;
2287 }
2288
2289 now_floor = mn_now;
2290 ev_rt_now = ev_time ();
2291
2292 /* loop a few times, before making important decisions.
2293 * on the choice of "4": one iteration isn't enough,
2294 * in case we get preempted during the calls to
2295 * ev_time and get_clock. a second call is almost guaranteed
2296 * to succeed in that case, though. and looping a few more times
2297 * doesn't hurt either as we only do this on time-jumps or
2298 * in the unlikely event of having been preempted here.
2299 */
2300 for (i = 4; --i; )
2301 {
2302 rtmn_diff = ev_rt_now - mn_now;
2303
2304 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2305 return; /* all is well */
2306
2307 ev_rt_now = ev_time ();
2308 mn_now = get_clock ();
2309 now_floor = mn_now;
2310 }
2311
2312 /* no timer adjustment, as the monotonic clock doesn't jump */
2313 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2314# if EV_PERIODIC_ENABLE
2315 periodics_reschedule (EV_A);
2316# endif
2317 }
2318 else
2319#endif
2320 {
2321 ev_rt_now = ev_time ();
2322
2323 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2324 {
2325 /* adjust timers. this is easy, as the offset is the same for all of them */
2326 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2327#if EV_PERIODIC_ENABLE
2328 periodics_reschedule (EV_A);
2329#endif
2330 }
2331
2332 mn_now = ev_rt_now;
2333 }
2334}
2335
2336void
2337ev_run (EV_P_ int flags)
2338{
2339#if EV_FEATURE_API
2340 ++loop_depth;
2341#endif
2342
2343 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2344
2345 loop_done = EVBREAK_CANCEL;
2346
2347 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2348
2349 do
2350 {
2351#if EV_VERIFY >= 2
2352 ev_verify (EV_A);
2353#endif
2354
2355#ifndef _WIN32
2356 if (expect_false (curpid)) /* penalise the forking check even more */
2357 if (expect_false (getpid () != curpid))
630 { 2358 {
631 p->w->pending = 0; 2359 curpid = getpid ();
632 p->w->cb (p->w, p->events); 2360 postfork = 1;
633 } 2361 }
2362#endif
2363
2364#if EV_FORK_ENABLE
2365 /* we might have forked, so queue fork handlers */
2366 if (expect_false (postfork))
2367 if (forkcnt)
2368 {
2369 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2370 EV_INVOKE_PENDING;
2371 }
2372#endif
2373
2374#if EV_PREPARE_ENABLE
2375 /* queue prepare watchers (and execute them) */
2376 if (expect_false (preparecnt))
2377 {
2378 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2379 EV_INVOKE_PENDING;
2380 }
2381#endif
2382
2383 if (expect_false (loop_done))
2384 break;
2385
2386 /* we might have forked, so reify kernel state if necessary */
2387 if (expect_false (postfork))
2388 loop_fork (EV_A);
2389
2390 /* update fd-related kernel structures */
2391 fd_reify (EV_A);
2392
2393 /* calculate blocking time */
2394 {
2395 ev_tstamp waittime = 0.;
2396 ev_tstamp sleeptime = 0.;
2397
2398 /* remember old timestamp for io_blocktime calculation */
2399 ev_tstamp prev_mn_now = mn_now;
2400
2401 /* update time to cancel out callback processing overhead */
2402 time_update (EV_A_ 1e100);
2403
2404 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
2405 {
2406 waittime = MAX_BLOCKTIME;
2407
2408 if (timercnt)
2409 {
2410 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2411 if (waittime > to) waittime = to;
2412 }
2413
2414#if EV_PERIODIC_ENABLE
2415 if (periodiccnt)
2416 {
2417 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2418 if (waittime > to) waittime = to;
2419 }
2420#endif
2421
2422 /* don't let timeouts decrease the waittime below timeout_blocktime */
2423 if (expect_false (waittime < timeout_blocktime))
2424 waittime = timeout_blocktime;
2425
2426 /* extra check because io_blocktime is commonly 0 */
2427 if (expect_false (io_blocktime))
2428 {
2429 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2430
2431 if (sleeptime > waittime - backend_fudge)
2432 sleeptime = waittime - backend_fudge;
2433
2434 if (expect_true (sleeptime > 0.))
2435 {
2436 ev_sleep (sleeptime);
2437 waittime -= sleeptime;
2438 }
2439 }
2440 }
2441
2442#if EV_FEATURE_API
2443 ++loop_count;
2444#endif
2445 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2446 backend_poll (EV_A_ waittime);
2447 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2448
2449 /* update ev_rt_now, do magic */
2450 time_update (EV_A_ waittime + sleeptime);
634 } 2451 }
635}
636 2452
637static void 2453 /* queue pending timers and reschedule them */
638timers_reify (void) 2454 timers_reify (EV_A); /* relative timers called last */
2455#if EV_PERIODIC_ENABLE
2456 periodics_reify (EV_A); /* absolute timers called first */
2457#endif
2458
2459#if EV_IDLE_ENABLE
2460 /* queue idle watchers unless other events are pending */
2461 idle_reify (EV_A);
2462#endif
2463
2464#if EV_CHECK_ENABLE
2465 /* queue check watchers, to be executed first */
2466 if (expect_false (checkcnt))
2467 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2468#endif
2469
2470 EV_INVOKE_PENDING;
2471 }
2472 while (expect_true (
2473 activecnt
2474 && !loop_done
2475 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2476 ));
2477
2478 if (loop_done == EVBREAK_ONE)
2479 loop_done = EVBREAK_CANCEL;
2480
2481#if EV_FEATURE_API
2482 --loop_depth;
2483#endif
2484}
2485
2486void
2487ev_break (EV_P_ int how)
639{ 2488{
640 while (timercnt && timers [0]->at <= now) 2489 loop_done = how;
2490}
2491
2492void
2493ev_ref (EV_P)
2494{
2495 ++activecnt;
2496}
2497
2498void
2499ev_unref (EV_P)
2500{
2501 --activecnt;
2502}
2503
2504void
2505ev_now_update (EV_P)
2506{
2507 time_update (EV_A_ 1e100);
2508}
2509
2510void
2511ev_suspend (EV_P)
2512{
2513 ev_now_update (EV_A);
2514}
2515
2516void
2517ev_resume (EV_P)
2518{
2519 ev_tstamp mn_prev = mn_now;
2520
2521 ev_now_update (EV_A);
2522 timers_reschedule (EV_A_ mn_now - mn_prev);
2523#if EV_PERIODIC_ENABLE
2524 /* TODO: really do this? */
2525 periodics_reschedule (EV_A);
2526#endif
2527}
2528
2529/*****************************************************************************/
2530/* singly-linked list management, used when the expected list length is short */
2531
2532inline_size void
2533wlist_add (WL *head, WL elem)
2534{
2535 elem->next = *head;
2536 *head = elem;
2537}
2538
2539inline_size void
2540wlist_del (WL *head, WL elem)
2541{
2542 while (*head)
2543 {
2544 if (expect_true (*head == elem))
2545 {
2546 *head = elem->next;
2547 break;
2548 }
2549
2550 head = &(*head)->next;
2551 }
2552}
2553
2554/* internal, faster, version of ev_clear_pending */
2555inline_speed void
2556clear_pending (EV_P_ W w)
2557{
2558 if (w->pending)
2559 {
2560 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2561 w->pending = 0;
2562 }
2563}
2564
2565int
2566ev_clear_pending (EV_P_ void *w)
2567{
2568 W w_ = (W)w;
2569 int pending = w_->pending;
2570
2571 if (expect_true (pending))
2572 {
2573 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2574 p->w = (W)&pending_w;
2575 w_->pending = 0;
2576 return p->events;
2577 }
2578 else
2579 return 0;
2580}
2581
2582inline_size void
2583pri_adjust (EV_P_ W w)
2584{
2585 int pri = ev_priority (w);
2586 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2587 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2588 ev_set_priority (w, pri);
2589}
2590
2591inline_speed void
2592ev_start (EV_P_ W w, int active)
2593{
2594 pri_adjust (EV_A_ w);
2595 w->active = active;
2596 ev_ref (EV_A);
2597}
2598
2599inline_size void
2600ev_stop (EV_P_ W w)
2601{
2602 ev_unref (EV_A);
2603 w->active = 0;
2604}
2605
2606/*****************************************************************************/
2607
2608void noinline
2609ev_io_start (EV_P_ ev_io *w)
2610{
2611 int fd = w->fd;
2612
2613 if (expect_false (ev_is_active (w)))
2614 return;
2615
2616 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2617 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2618
2619 EV_FREQUENT_CHECK;
2620
2621 ev_start (EV_A_ (W)w, 1);
2622 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2623 wlist_add (&anfds[fd].head, (WL)w);
2624
2625 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2626 w->events &= ~EV__IOFDSET;
2627
2628 EV_FREQUENT_CHECK;
2629}
2630
2631void noinline
2632ev_io_stop (EV_P_ ev_io *w)
2633{
2634 clear_pending (EV_A_ (W)w);
2635 if (expect_false (!ev_is_active (w)))
2636 return;
2637
2638 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2639
2640 EV_FREQUENT_CHECK;
2641
2642 wlist_del (&anfds[w->fd].head, (WL)w);
2643 ev_stop (EV_A_ (W)w);
2644
2645 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2646
2647 EV_FREQUENT_CHECK;
2648}
2649
2650void noinline
2651ev_timer_start (EV_P_ ev_timer *w)
2652{
2653 if (expect_false (ev_is_active (w)))
2654 return;
2655
2656 ev_at (w) += mn_now;
2657
2658 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2659
2660 EV_FREQUENT_CHECK;
2661
2662 ++timercnt;
2663 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2664 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2665 ANHE_w (timers [ev_active (w)]) = (WT)w;
2666 ANHE_at_cache (timers [ev_active (w)]);
2667 upheap (timers, ev_active (w));
2668
2669 EV_FREQUENT_CHECK;
2670
2671 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2672}
2673
2674void noinline
2675ev_timer_stop (EV_P_ ev_timer *w)
2676{
2677 clear_pending (EV_A_ (W)w);
2678 if (expect_false (!ev_is_active (w)))
2679 return;
2680
2681 EV_FREQUENT_CHECK;
2682
2683 {
2684 int active = ev_active (w);
2685
2686 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2687
2688 --timercnt;
2689
2690 if (expect_true (active < timercnt + HEAP0))
641 { 2691 {
642 struct ev_timer *w = timers [0]; 2692 timers [active] = timers [timercnt + HEAP0];
2693 adjustheap (timers, timercnt, active);
2694 }
2695 }
643 2696
644 /* first reschedule or stop timer */ 2697 ev_at (w) -= mn_now;
2698
2699 ev_stop (EV_A_ (W)w);
2700
2701 EV_FREQUENT_CHECK;
2702}
2703
2704void noinline
2705ev_timer_again (EV_P_ ev_timer *w)
2706{
2707 EV_FREQUENT_CHECK;
2708
2709 if (ev_is_active (w))
2710 {
645 if (w->repeat) 2711 if (w->repeat)
646 { 2712 {
647 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
648 w->at = now + w->repeat; 2713 ev_at (w) = mn_now + w->repeat;
649 downheap ((WT *)timers, timercnt, 0); 2714 ANHE_at_cache (timers [ev_active (w)]);
2715 adjustheap (timers, timercnt, ev_active (w));
650 } 2716 }
651 else 2717 else
652 ev_timer_stop (w); /* nonrepeating: stop timer */ 2718 ev_timer_stop (EV_A_ w);
653
654 event ((W)w, EV_TIMEOUT);
655 }
656}
657
658static void
659periodics_reify (void)
660{
661 while (periodiccnt && periodics [0]->at <= ev_now)
662 { 2719 }
663 struct ev_periodic *w = periodics [0]; 2720 else if (w->repeat)
2721 {
2722 ev_at (w) = w->repeat;
2723 ev_timer_start (EV_A_ w);
2724 }
664 2725
665 /* first reschedule or stop timer */ 2726 EV_FREQUENT_CHECK;
2727}
2728
2729ev_tstamp
2730ev_timer_remaining (EV_P_ ev_timer *w)
2731{
2732 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2733}
2734
2735#if EV_PERIODIC_ENABLE
2736void noinline
2737ev_periodic_start (EV_P_ ev_periodic *w)
2738{
2739 if (expect_false (ev_is_active (w)))
2740 return;
2741
2742 if (w->reschedule_cb)
2743 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
666 if (w->interval) 2744 else if (w->interval)
2745 {
2746 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2747 /* this formula differs from the one in periodic_reify because we do not always round up */
2748 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2749 }
2750 else
2751 ev_at (w) = w->offset;
2752
2753 EV_FREQUENT_CHECK;
2754
2755 ++periodiccnt;
2756 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2757 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2758 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2759 ANHE_at_cache (periodics [ev_active (w)]);
2760 upheap (periodics, ev_active (w));
2761
2762 EV_FREQUENT_CHECK;
2763
2764 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2765}
2766
2767void noinline
2768ev_periodic_stop (EV_P_ ev_periodic *w)
2769{
2770 clear_pending (EV_A_ (W)w);
2771 if (expect_false (!ev_is_active (w)))
2772 return;
2773
2774 EV_FREQUENT_CHECK;
2775
2776 {
2777 int active = ev_active (w);
2778
2779 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2780
2781 --periodiccnt;
2782
2783 if (expect_true (active < periodiccnt + HEAP0))
2784 {
2785 periodics [active] = periodics [periodiccnt + HEAP0];
2786 adjustheap (periodics, periodiccnt, active);
2787 }
2788 }
2789
2790 ev_stop (EV_A_ (W)w);
2791
2792 EV_FREQUENT_CHECK;
2793}
2794
2795void noinline
2796ev_periodic_again (EV_P_ ev_periodic *w)
2797{
2798 /* TODO: use adjustheap and recalculation */
2799 ev_periodic_stop (EV_A_ w);
2800 ev_periodic_start (EV_A_ w);
2801}
2802#endif
2803
2804#ifndef SA_RESTART
2805# define SA_RESTART 0
2806#endif
2807
2808#if EV_SIGNAL_ENABLE
2809
2810void noinline
2811ev_signal_start (EV_P_ ev_signal *w)
2812{
2813 if (expect_false (ev_is_active (w)))
2814 return;
2815
2816 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2817
2818#if EV_MULTIPLICITY
2819 assert (("libev: a signal must not be attached to two different loops",
2820 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2821
2822 signals [w->signum - 1].loop = EV_A;
2823#endif
2824
2825 EV_FREQUENT_CHECK;
2826
2827#if EV_USE_SIGNALFD
2828 if (sigfd == -2)
2829 {
2830 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2831 if (sigfd < 0 && errno == EINVAL)
2832 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2833
2834 if (sigfd >= 0)
667 { 2835 {
668 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2836 fd_intern (sigfd); /* doing it twice will not hurt */
669 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 2837
670 downheap ((WT *)periodics, periodiccnt, 0); 2838 sigemptyset (&sigfd_set);
2839
2840 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2841 ev_set_priority (&sigfd_w, EV_MAXPRI);
2842 ev_io_start (EV_A_ &sigfd_w);
2843 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2844 }
2845 }
2846
2847 if (sigfd >= 0)
2848 {
2849 /* TODO: check .head */
2850 sigaddset (&sigfd_set, w->signum);
2851 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2852
2853 signalfd (sigfd, &sigfd_set, 0);
2854 }
2855#endif
2856
2857 ev_start (EV_A_ (W)w, 1);
2858 wlist_add (&signals [w->signum - 1].head, (WL)w);
2859
2860 if (!((WL)w)->next)
2861# if EV_USE_SIGNALFD
2862 if (sigfd < 0) /*TODO*/
2863# endif
2864 {
2865# ifdef _WIN32
2866 evpipe_init (EV_A);
2867
2868 signal (w->signum, ev_sighandler);
2869# else
2870 struct sigaction sa;
2871
2872 evpipe_init (EV_A);
2873
2874 sa.sa_handler = ev_sighandler;
2875 sigfillset (&sa.sa_mask);
2876 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2877 sigaction (w->signum, &sa, 0);
2878
2879 sigemptyset (&sa.sa_mask);
2880 sigaddset (&sa.sa_mask, w->signum);
2881 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2882#endif
2883 }
2884
2885 EV_FREQUENT_CHECK;
2886}
2887
2888void noinline
2889ev_signal_stop (EV_P_ ev_signal *w)
2890{
2891 clear_pending (EV_A_ (W)w);
2892 if (expect_false (!ev_is_active (w)))
2893 return;
2894
2895 EV_FREQUENT_CHECK;
2896
2897 wlist_del (&signals [w->signum - 1].head, (WL)w);
2898 ev_stop (EV_A_ (W)w);
2899
2900 if (!signals [w->signum - 1].head)
2901 {
2902#if EV_MULTIPLICITY
2903 signals [w->signum - 1].loop = 0; /* unattach from signal */
2904#endif
2905#if EV_USE_SIGNALFD
2906 if (sigfd >= 0)
2907 {
2908 sigset_t ss;
2909
2910 sigemptyset (&ss);
2911 sigaddset (&ss, w->signum);
2912 sigdelset (&sigfd_set, w->signum);
2913
2914 signalfd (sigfd, &sigfd_set, 0);
2915 sigprocmask (SIG_UNBLOCK, &ss, 0);
671 } 2916 }
672 else 2917 else
673 ev_periodic_stop (w); /* nonrepeating: stop timer */ 2918#endif
674 2919 signal (w->signum, SIG_DFL);
675 event ((W)w, EV_PERIODIC);
676 }
677}
678
679static void
680periodics_reschedule (ev_tstamp diff)
681{
682 int i;
683
684 /* adjust periodics after time jump */
685 for (i = 0; i < periodiccnt; ++i)
686 { 2920 }
687 struct ev_periodic *w = periodics [i];
688 2921
689 if (w->interval) 2922 EV_FREQUENT_CHECK;
2923}
2924
2925#endif
2926
2927#if EV_CHILD_ENABLE
2928
2929void
2930ev_child_start (EV_P_ ev_child *w)
2931{
2932#if EV_MULTIPLICITY
2933 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2934#endif
2935 if (expect_false (ev_is_active (w)))
2936 return;
2937
2938 EV_FREQUENT_CHECK;
2939
2940 ev_start (EV_A_ (W)w, 1);
2941 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2942
2943 EV_FREQUENT_CHECK;
2944}
2945
2946void
2947ev_child_stop (EV_P_ ev_child *w)
2948{
2949 clear_pending (EV_A_ (W)w);
2950 if (expect_false (!ev_is_active (w)))
2951 return;
2952
2953 EV_FREQUENT_CHECK;
2954
2955 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2956 ev_stop (EV_A_ (W)w);
2957
2958 EV_FREQUENT_CHECK;
2959}
2960
2961#endif
2962
2963#if EV_STAT_ENABLE
2964
2965# ifdef _WIN32
2966# undef lstat
2967# define lstat(a,b) _stati64 (a,b)
2968# endif
2969
2970#define DEF_STAT_INTERVAL 5.0074891
2971#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2972#define MIN_STAT_INTERVAL 0.1074891
2973
2974static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2975
2976#if EV_USE_INOTIFY
2977
2978/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2979# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2980
2981static void noinline
2982infy_add (EV_P_ ev_stat *w)
2983{
2984 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);
2985
2986 if (w->wd >= 0)
2987 {
2988 struct statfs sfs;
2989
2990 /* now local changes will be tracked by inotify, but remote changes won't */
2991 /* unless the filesystem is known to be local, we therefore still poll */
2992 /* also do poll on <2.6.25, but with normal frequency */
2993
2994 if (!fs_2625)
2995 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2996 else if (!statfs (w->path, &sfs)
2997 && (sfs.f_type == 0x1373 /* devfs */
2998 || sfs.f_type == 0xEF53 /* ext2/3 */
2999 || sfs.f_type == 0x3153464a /* jfs */
3000 || sfs.f_type == 0x52654973 /* reiser3 */
3001 || sfs.f_type == 0x01021994 /* tempfs */
3002 || sfs.f_type == 0x58465342 /* xfs */))
3003 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3004 else
3005 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3006 }
3007 else
3008 {
3009 /* can't use inotify, continue to stat */
3010 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3011
3012 /* if path is not there, monitor some parent directory for speedup hints */
3013 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3014 /* but an efficiency issue only */
3015 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
690 { 3016 {
691 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3017 char path [4096];
3018 strcpy (path, w->path);
692 3019
693 if (fabs (diff) >= 1e-4) 3020 do
694 { 3021 {
695 ev_periodic_stop (w); 3022 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
696 ev_periodic_start (w); 3023 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
697 3024
698 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3025 char *pend = strrchr (path, '/');
3026
3027 if (!pend || pend == path)
3028 break;
3029
3030 *pend = 0;
3031 w->wd = inotify_add_watch (fs_fd, path, mask);
3032 }
3033 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3034 }
3035 }
3036
3037 if (w->wd >= 0)
3038 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3039
3040 /* now re-arm timer, if required */
3041 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3042 ev_timer_again (EV_A_ &w->timer);
3043 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3044}
3045
3046static void noinline
3047infy_del (EV_P_ ev_stat *w)
3048{
3049 int slot;
3050 int wd = w->wd;
3051
3052 if (wd < 0)
3053 return;
3054
3055 w->wd = -2;
3056 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3057 wlist_del (&fs_hash [slot].head, (WL)w);
3058
3059 /* remove this watcher, if others are watching it, they will rearm */
3060 inotify_rm_watch (fs_fd, wd);
3061}
3062
3063static void noinline
3064infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3065{
3066 if (slot < 0)
3067 /* overflow, need to check for all hash slots */
3068 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3069 infy_wd (EV_A_ slot, wd, ev);
3070 else
3071 {
3072 WL w_;
3073
3074 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3075 {
3076 ev_stat *w = (ev_stat *)w_;
3077 w_ = w_->next; /* lets us remove this watcher and all before it */
3078
3079 if (w->wd == wd || wd == -1)
3080 {
3081 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3082 {
3083 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3084 w->wd = -1;
3085 infy_add (EV_A_ w); /* re-add, no matter what */
3086 }
3087
3088 stat_timer_cb (EV_A_ &w->timer, 0);
699 } 3089 }
700 } 3090 }
701 } 3091 }
702} 3092}
703 3093
704static int 3094static void
705time_update_monotonic (void) 3095infy_cb (EV_P_ ev_io *w, int revents)
706{ 3096{
707 now = get_clock (); 3097 char buf [EV_INOTIFY_BUFSIZE];
3098 int ofs;
3099 int len = read (fs_fd, buf, sizeof (buf));
708 3100
709 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 3101 for (ofs = 0; ofs < len; )
3102 {
3103 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3104 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3105 ofs += sizeof (struct inotify_event) + ev->len;
710 { 3106 }
711 ev_now = now + diff; 3107}
3108
3109inline_size void
3110ev_check_2625 (EV_P)
3111{
3112 /* kernels < 2.6.25 are borked
3113 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3114 */
3115 if (ev_linux_version () < 0x020619)
712 return 0; 3116 return;
3117
3118 fs_2625 = 1;
3119}
3120
3121inline_size int
3122infy_newfd (void)
3123{
3124#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3125 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3126 if (fd >= 0)
3127 return fd;
3128#endif
3129 return inotify_init ();
3130}
3131
3132inline_size void
3133infy_init (EV_P)
3134{
3135 if (fs_fd != -2)
3136 return;
3137
3138 fs_fd = -1;
3139
3140 ev_check_2625 (EV_A);
3141
3142 fs_fd = infy_newfd ();
3143
3144 if (fs_fd >= 0)
713 } 3145 {
3146 fd_intern (fs_fd);
3147 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3148 ev_set_priority (&fs_w, EV_MAXPRI);
3149 ev_io_start (EV_A_ &fs_w);
3150 ev_unref (EV_A);
3151 }
3152}
3153
3154inline_size void
3155infy_fork (EV_P)
3156{
3157 int slot;
3158
3159 if (fs_fd < 0)
3160 return;
3161
3162 ev_ref (EV_A);
3163 ev_io_stop (EV_A_ &fs_w);
3164 close (fs_fd);
3165 fs_fd = infy_newfd ();
3166
3167 if (fs_fd >= 0)
3168 {
3169 fd_intern (fs_fd);
3170 ev_io_set (&fs_w, fs_fd, EV_READ);
3171 ev_io_start (EV_A_ &fs_w);
3172 ev_unref (EV_A);
3173 }
3174
3175 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3176 {
3177 WL w_ = fs_hash [slot].head;
3178 fs_hash [slot].head = 0;
3179
3180 while (w_)
3181 {
3182 ev_stat *w = (ev_stat *)w_;
3183 w_ = w_->next; /* lets us add this watcher */
3184
3185 w->wd = -1;
3186
3187 if (fs_fd >= 0)
3188 infy_add (EV_A_ w); /* re-add, no matter what */
3189 else
3190 {
3191 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3192 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3193 ev_timer_again (EV_A_ &w->timer);
3194 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3195 }
3196 }
3197 }
3198}
3199
3200#endif
3201
3202#ifdef _WIN32
3203# define EV_LSTAT(p,b) _stati64 (p, b)
3204#else
3205# define EV_LSTAT(p,b) lstat (p, b)
3206#endif
3207
3208void
3209ev_stat_stat (EV_P_ ev_stat *w)
3210{
3211 if (lstat (w->path, &w->attr) < 0)
3212 w->attr.st_nlink = 0;
3213 else if (!w->attr.st_nlink)
3214 w->attr.st_nlink = 1;
3215}
3216
3217static void noinline
3218stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3219{
3220 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3221
3222 ev_statdata prev = w->attr;
3223 ev_stat_stat (EV_A_ w);
3224
3225 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3226 if (
3227 prev.st_dev != w->attr.st_dev
3228 || prev.st_ino != w->attr.st_ino
3229 || prev.st_mode != w->attr.st_mode
3230 || prev.st_nlink != w->attr.st_nlink
3231 || prev.st_uid != w->attr.st_uid
3232 || prev.st_gid != w->attr.st_gid
3233 || prev.st_rdev != w->attr.st_rdev
3234 || prev.st_size != w->attr.st_size
3235 || prev.st_atime != w->attr.st_atime
3236 || prev.st_mtime != w->attr.st_mtime
3237 || prev.st_ctime != w->attr.st_ctime
3238 ) {
3239 /* we only update w->prev on actual differences */
3240 /* in case we test more often than invoke the callback, */
3241 /* to ensure that prev is always different to attr */
3242 w->prev = prev;
3243
3244 #if EV_USE_INOTIFY
3245 if (fs_fd >= 0)
3246 {
3247 infy_del (EV_A_ w);
3248 infy_add (EV_A_ w);
3249 ev_stat_stat (EV_A_ w); /* avoid race... */
3250 }
3251 #endif
3252
3253 ev_feed_event (EV_A_ w, EV_STAT);
3254 }
3255}
3256
3257void
3258ev_stat_start (EV_P_ ev_stat *w)
3259{
3260 if (expect_false (ev_is_active (w)))
3261 return;
3262
3263 ev_stat_stat (EV_A_ w);
3264
3265 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3266 w->interval = MIN_STAT_INTERVAL;
3267
3268 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3269 ev_set_priority (&w->timer, ev_priority (w));
3270
3271#if EV_USE_INOTIFY
3272 infy_init (EV_A);
3273
3274 if (fs_fd >= 0)
3275 infy_add (EV_A_ w);
714 else 3276 else
3277#endif
3278 {
3279 ev_timer_again (EV_A_ &w->timer);
3280 ev_unref (EV_A);
715 { 3281 }
716 now_floor = now; 3282
717 ev_now = ev_time (); 3283 ev_start (EV_A_ (W)w, 1);
3284
3285 EV_FREQUENT_CHECK;
3286}
3287
3288void
3289ev_stat_stop (EV_P_ ev_stat *w)
3290{
3291 clear_pending (EV_A_ (W)w);
3292 if (expect_false (!ev_is_active (w)))
718 return 1; 3293 return;
3294
3295 EV_FREQUENT_CHECK;
3296
3297#if EV_USE_INOTIFY
3298 infy_del (EV_A_ w);
3299#endif
3300
3301 if (ev_is_active (&w->timer))
719 } 3302 {
3303 ev_ref (EV_A);
3304 ev_timer_stop (EV_A_ &w->timer);
3305 }
3306
3307 ev_stop (EV_A_ (W)w);
3308
3309 EV_FREQUENT_CHECK;
3310}
3311#endif
3312
3313#if EV_IDLE_ENABLE
3314void
3315ev_idle_start (EV_P_ ev_idle *w)
3316{
3317 if (expect_false (ev_is_active (w)))
3318 return;
3319
3320 pri_adjust (EV_A_ (W)w);
3321
3322 EV_FREQUENT_CHECK;
3323
3324 {
3325 int active = ++idlecnt [ABSPRI (w)];
3326
3327 ++idleall;
3328 ev_start (EV_A_ (W)w, active);
3329
3330 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3331 idles [ABSPRI (w)][active - 1] = w;
3332 }
3333
3334 EV_FREQUENT_CHECK;
3335}
3336
3337void
3338ev_idle_stop (EV_P_ ev_idle *w)
3339{
3340 clear_pending (EV_A_ (W)w);
3341 if (expect_false (!ev_is_active (w)))
3342 return;
3343
3344 EV_FREQUENT_CHECK;
3345
3346 {
3347 int active = ev_active (w);
3348
3349 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3350 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3351
3352 ev_stop (EV_A_ (W)w);
3353 --idleall;
3354 }
3355
3356 EV_FREQUENT_CHECK;
3357}
3358#endif
3359
3360#if EV_PREPARE_ENABLE
3361void
3362ev_prepare_start (EV_P_ ev_prepare *w)
3363{
3364 if (expect_false (ev_is_active (w)))
3365 return;
3366
3367 EV_FREQUENT_CHECK;
3368
3369 ev_start (EV_A_ (W)w, ++preparecnt);
3370 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3371 prepares [preparecnt - 1] = w;
3372
3373 EV_FREQUENT_CHECK;
3374}
3375
3376void
3377ev_prepare_stop (EV_P_ ev_prepare *w)
3378{
3379 clear_pending (EV_A_ (W)w);
3380 if (expect_false (!ev_is_active (w)))
3381 return;
3382
3383 EV_FREQUENT_CHECK;
3384
3385 {
3386 int active = ev_active (w);
3387
3388 prepares [active - 1] = prepares [--preparecnt];
3389 ev_active (prepares [active - 1]) = active;
3390 }
3391
3392 ev_stop (EV_A_ (W)w);
3393
3394 EV_FREQUENT_CHECK;
3395}
3396#endif
3397
3398#if EV_CHECK_ENABLE
3399void
3400ev_check_start (EV_P_ ev_check *w)
3401{
3402 if (expect_false (ev_is_active (w)))
3403 return;
3404
3405 EV_FREQUENT_CHECK;
3406
3407 ev_start (EV_A_ (W)w, ++checkcnt);
3408 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3409 checks [checkcnt - 1] = w;
3410
3411 EV_FREQUENT_CHECK;
3412}
3413
3414void
3415ev_check_stop (EV_P_ ev_check *w)
3416{
3417 clear_pending (EV_A_ (W)w);
3418 if (expect_false (!ev_is_active (w)))
3419 return;
3420
3421 EV_FREQUENT_CHECK;
3422
3423 {
3424 int active = ev_active (w);
3425
3426 checks [active - 1] = checks [--checkcnt];
3427 ev_active (checks [active - 1]) = active;
3428 }
3429
3430 ev_stop (EV_A_ (W)w);
3431
3432 EV_FREQUENT_CHECK;
3433}
3434#endif
3435
3436#if EV_EMBED_ENABLE
3437void noinline
3438ev_embed_sweep (EV_P_ ev_embed *w)
3439{
3440 ev_run (w->other, EVRUN_NOWAIT);
720} 3441}
721 3442
722static void 3443static void
723time_update (void) 3444embed_io_cb (EV_P_ ev_io *io, int revents)
724{ 3445{
725 int i; 3446 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
726 3447
727#if EV_USE_MONOTONIC 3448 if (ev_cb (w))
728 if (expect_true (have_monotonic)) 3449 ev_feed_event (EV_A_ (W)w, EV_EMBED);
729 {
730 if (time_update_monotonic ())
731 {
732 ev_tstamp odiff = diff;
733
734 for (i = 4; --i; ) /* loop a few times, before making important decisions */
735 {
736 diff = ev_now - now;
737
738 if (fabs (odiff - diff) < MIN_TIMEJUMP)
739 return; /* all is well */
740
741 ev_now = ev_time ();
742 now = get_clock ();
743 now_floor = now;
744 }
745
746 periodics_reschedule (diff - odiff);
747 /* no timer adjustment, as the monotonic clock doesn't jump */
748 }
749 }
750 else 3450 else
751#endif 3451 ev_run (w->other, EVRUN_NOWAIT);
3452}
3453
3454static void
3455embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3456{
3457 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3458
752 { 3459 {
753 ev_now = ev_time (); 3460 EV_P = w->other;
754 3461
755 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 3462 while (fdchangecnt)
756 { 3463 {
757 periodics_reschedule (ev_now - now); 3464 fd_reify (EV_A);
758 3465 ev_run (EV_A_ EVRUN_NOWAIT);
759 /* adjust timers. this is easy, as the offset is the same for all */
760 for (i = 0; i < timercnt; ++i)
761 timers [i]->at += diff;
762 } 3466 }
763
764 now = ev_now;
765 } 3467 }
766} 3468}
767 3469
768int ev_loop_done; 3470static void
769 3471embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
770void ev_loop (int flags)
771{ 3472{
772 double block; 3473 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
773 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
774 3474
775 do 3475 ev_embed_stop (EV_A_ w);
3476
776 { 3477 {
777 /* queue check watchers (and execute them) */ 3478 EV_P = w->other;
778 if (expect_false (preparecnt))
779 {
780 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
781 call_pending ();
782 }
783 3479
784 /* update fd-related kernel structures */ 3480 ev_loop_fork (EV_A);
785 fd_reify (); 3481 ev_run (EV_A_ EVRUN_NOWAIT);
786
787 /* calculate blocking time */
788
789 /* we only need this for !monotonic clockor timers, but as we basically
790 always have timers, we just calculate it always */
791#if EV_USE_MONOTONIC
792 if (expect_true (have_monotonic))
793 time_update_monotonic ();
794 else
795#endif
796 {
797 ev_now = ev_time ();
798 now = ev_now;
799 }
800
801 if (flags & EVLOOP_NONBLOCK || idlecnt)
802 block = 0.;
803 else
804 {
805 block = MAX_BLOCKTIME;
806
807 if (timercnt)
808 {
809 ev_tstamp to = timers [0]->at - now + method_fudge;
810 if (block > to) block = to;
811 }
812
813 if (periodiccnt)
814 {
815 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
816 if (block > to) block = to;
817 }
818
819 if (block < 0.) block = 0.;
820 }
821
822 method_poll (block);
823
824 /* update ev_now, do magic */
825 time_update ();
826
827 /* queue pending timers and reschedule them */
828 timers_reify (); /* relative timers called last */
829 periodics_reify (); /* absolute timers called first */
830
831 /* queue idle watchers unless io or timers are pending */
832 if (!pendingcnt)
833 queue_events ((W *)idles, idlecnt, EV_IDLE);
834
835 /* queue check watchers, to be executed first */
836 if (checkcnt)
837 queue_events ((W *)checks, checkcnt, EV_CHECK);
838
839 call_pending ();
840 } 3482 }
841 while (!ev_loop_done);
842 3483
843 if (ev_loop_done != 2) 3484 ev_embed_start (EV_A_ w);
844 ev_loop_done = 0;
845} 3485}
3486
3487#if 0
3488static void
3489embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3490{
3491 ev_idle_stop (EV_A_ idle);
3492}
3493#endif
3494
3495void
3496ev_embed_start (EV_P_ ev_embed *w)
3497{
3498 if (expect_false (ev_is_active (w)))
3499 return;
3500
3501 {
3502 EV_P = w->other;
3503 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3504 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3505 }
3506
3507 EV_FREQUENT_CHECK;
3508
3509 ev_set_priority (&w->io, ev_priority (w));
3510 ev_io_start (EV_A_ &w->io);
3511
3512 ev_prepare_init (&w->prepare, embed_prepare_cb);
3513 ev_set_priority (&w->prepare, EV_MINPRI);
3514 ev_prepare_start (EV_A_ &w->prepare);
3515
3516 ev_fork_init (&w->fork, embed_fork_cb);
3517 ev_fork_start (EV_A_ &w->fork);
3518
3519 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3520
3521 ev_start (EV_A_ (W)w, 1);
3522
3523 EV_FREQUENT_CHECK;
3524}
3525
3526void
3527ev_embed_stop (EV_P_ ev_embed *w)
3528{
3529 clear_pending (EV_A_ (W)w);
3530 if (expect_false (!ev_is_active (w)))
3531 return;
3532
3533 EV_FREQUENT_CHECK;
3534
3535 ev_io_stop (EV_A_ &w->io);
3536 ev_prepare_stop (EV_A_ &w->prepare);
3537 ev_fork_stop (EV_A_ &w->fork);
3538
3539 ev_stop (EV_A_ (W)w);
3540
3541 EV_FREQUENT_CHECK;
3542}
3543#endif
3544
3545#if EV_FORK_ENABLE
3546void
3547ev_fork_start (EV_P_ ev_fork *w)
3548{
3549 if (expect_false (ev_is_active (w)))
3550 return;
3551
3552 EV_FREQUENT_CHECK;
3553
3554 ev_start (EV_A_ (W)w, ++forkcnt);
3555 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3556 forks [forkcnt - 1] = w;
3557
3558 EV_FREQUENT_CHECK;
3559}
3560
3561void
3562ev_fork_stop (EV_P_ ev_fork *w)
3563{
3564 clear_pending (EV_A_ (W)w);
3565 if (expect_false (!ev_is_active (w)))
3566 return;
3567
3568 EV_FREQUENT_CHECK;
3569
3570 {
3571 int active = ev_active (w);
3572
3573 forks [active - 1] = forks [--forkcnt];
3574 ev_active (forks [active - 1]) = active;
3575 }
3576
3577 ev_stop (EV_A_ (W)w);
3578
3579 EV_FREQUENT_CHECK;
3580}
3581#endif
3582
3583#if EV_ASYNC_ENABLE
3584void
3585ev_async_start (EV_P_ ev_async *w)
3586{
3587 if (expect_false (ev_is_active (w)))
3588 return;
3589
3590 w->sent = 0;
3591
3592 evpipe_init (EV_A);
3593
3594 EV_FREQUENT_CHECK;
3595
3596 ev_start (EV_A_ (W)w, ++asynccnt);
3597 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3598 asyncs [asynccnt - 1] = w;
3599
3600 EV_FREQUENT_CHECK;
3601}
3602
3603void
3604ev_async_stop (EV_P_ ev_async *w)
3605{
3606 clear_pending (EV_A_ (W)w);
3607 if (expect_false (!ev_is_active (w)))
3608 return;
3609
3610 EV_FREQUENT_CHECK;
3611
3612 {
3613 int active = ev_active (w);
3614
3615 asyncs [active - 1] = asyncs [--asynccnt];
3616 ev_active (asyncs [active - 1]) = active;
3617 }
3618
3619 ev_stop (EV_A_ (W)w);
3620
3621 EV_FREQUENT_CHECK;
3622}
3623
3624void
3625ev_async_send (EV_P_ ev_async *w)
3626{
3627 w->sent = 1;
3628 evpipe_write (EV_A_ &async_pending);
3629}
3630#endif
846 3631
847/*****************************************************************************/ 3632/*****************************************************************************/
848 3633
849static void
850wlist_add (WL *head, WL elem)
851{
852 elem->next = *head;
853 *head = elem;
854}
855
856static void
857wlist_del (WL *head, WL elem)
858{
859 while (*head)
860 {
861 if (*head == elem)
862 {
863 *head = elem->next;
864 return;
865 }
866
867 head = &(*head)->next;
868 }
869}
870
871static void
872ev_clear_pending (W w)
873{
874 if (w->pending)
875 {
876 pendings [ABSPRI (w)][w->pending - 1].w = 0;
877 w->pending = 0;
878 }
879}
880
881static void
882ev_start (W w, int active)
883{
884 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
885 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
886
887 w->active = active;
888}
889
890static void
891ev_stop (W w)
892{
893 w->active = 0;
894}
895
896/*****************************************************************************/
897
898void
899ev_io_start (struct ev_io *w)
900{
901 int fd = w->fd;
902
903 if (ev_is_active (w))
904 return;
905
906 assert (("ev_io_start called with negative fd", fd >= 0));
907
908 ev_start ((W)w, 1);
909 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
910 wlist_add ((WL *)&anfds[fd].head, (WL)w);
911
912 fd_change (fd);
913}
914
915void
916ev_io_stop (struct ev_io *w)
917{
918 ev_clear_pending ((W)w);
919 if (!ev_is_active (w))
920 return;
921
922 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
923 ev_stop ((W)w);
924
925 fd_change (w->fd);
926}
927
928void
929ev_timer_start (struct ev_timer *w)
930{
931 if (ev_is_active (w))
932 return;
933
934 w->at += now;
935
936 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
937
938 ev_start ((W)w, ++timercnt);
939 array_needsize (timers, timermax, timercnt, );
940 timers [timercnt - 1] = w;
941 upheap ((WT *)timers, timercnt - 1);
942}
943
944void
945ev_timer_stop (struct ev_timer *w)
946{
947 ev_clear_pending ((W)w);
948 if (!ev_is_active (w))
949 return;
950
951 if (w->active < timercnt--)
952 {
953 timers [w->active - 1] = timers [timercnt];
954 downheap ((WT *)timers, timercnt, w->active - 1);
955 }
956
957 w->at = w->repeat;
958
959 ev_stop ((W)w);
960}
961
962void
963ev_timer_again (struct ev_timer *w)
964{
965 if (ev_is_active (w))
966 {
967 if (w->repeat)
968 {
969 w->at = now + w->repeat;
970 downheap ((WT *)timers, timercnt, w->active - 1);
971 }
972 else
973 ev_timer_stop (w);
974 }
975 else if (w->repeat)
976 ev_timer_start (w);
977}
978
979void
980ev_periodic_start (struct ev_periodic *w)
981{
982 if (ev_is_active (w))
983 return;
984
985 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
986
987 /* this formula differs from the one in periodic_reify because we do not always round up */
988 if (w->interval)
989 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
990
991 ev_start ((W)w, ++periodiccnt);
992 array_needsize (periodics, periodicmax, periodiccnt, );
993 periodics [periodiccnt - 1] = w;
994 upheap ((WT *)periodics, periodiccnt - 1);
995}
996
997void
998ev_periodic_stop (struct ev_periodic *w)
999{
1000 ev_clear_pending ((W)w);
1001 if (!ev_is_active (w))
1002 return;
1003
1004 if (w->active < periodiccnt--)
1005 {
1006 periodics [w->active - 1] = periodics [periodiccnt];
1007 downheap ((WT *)periodics, periodiccnt, w->active - 1);
1008 }
1009
1010 ev_stop ((W)w);
1011}
1012
1013void
1014ev_signal_start (struct ev_signal *w)
1015{
1016 if (ev_is_active (w))
1017 return;
1018
1019 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1020
1021 ev_start ((W)w, 1);
1022 array_needsize (signals, signalmax, w->signum, signals_init);
1023 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1024
1025 if (!w->next)
1026 {
1027 struct sigaction sa;
1028 sa.sa_handler = sighandler;
1029 sigfillset (&sa.sa_mask);
1030 sa.sa_flags = 0;
1031 sigaction (w->signum, &sa, 0);
1032 }
1033}
1034
1035void
1036ev_signal_stop (struct ev_signal *w)
1037{
1038 ev_clear_pending ((W)w);
1039 if (!ev_is_active (w))
1040 return;
1041
1042 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1043 ev_stop ((W)w);
1044
1045 if (!signals [w->signum - 1].head)
1046 signal (w->signum, SIG_DFL);
1047}
1048
1049void
1050ev_idle_start (struct ev_idle *w)
1051{
1052 if (ev_is_active (w))
1053 return;
1054
1055 ev_start ((W)w, ++idlecnt);
1056 array_needsize (idles, idlemax, idlecnt, );
1057 idles [idlecnt - 1] = w;
1058}
1059
1060void
1061ev_idle_stop (struct ev_idle *w)
1062{
1063 ev_clear_pending ((W)w);
1064 if (ev_is_active (w))
1065 return;
1066
1067 idles [w->active - 1] = idles [--idlecnt];
1068 ev_stop ((W)w);
1069}
1070
1071void
1072ev_prepare_start (struct ev_prepare *w)
1073{
1074 if (ev_is_active (w))
1075 return;
1076
1077 ev_start ((W)w, ++preparecnt);
1078 array_needsize (prepares, preparemax, preparecnt, );
1079 prepares [preparecnt - 1] = w;
1080}
1081
1082void
1083ev_prepare_stop (struct ev_prepare *w)
1084{
1085 ev_clear_pending ((W)w);
1086 if (ev_is_active (w))
1087 return;
1088
1089 prepares [w->active - 1] = prepares [--preparecnt];
1090 ev_stop ((W)w);
1091}
1092
1093void
1094ev_check_start (struct ev_check *w)
1095{
1096 if (ev_is_active (w))
1097 return;
1098
1099 ev_start ((W)w, ++checkcnt);
1100 array_needsize (checks, checkmax, checkcnt, );
1101 checks [checkcnt - 1] = w;
1102}
1103
1104void
1105ev_check_stop (struct ev_check *w)
1106{
1107 ev_clear_pending ((W)w);
1108 if (ev_is_active (w))
1109 return;
1110
1111 checks [w->active - 1] = checks [--checkcnt];
1112 ev_stop ((W)w);
1113}
1114
1115void
1116ev_child_start (struct ev_child *w)
1117{
1118 if (ev_is_active (w))
1119 return;
1120
1121 ev_start ((W)w, 1);
1122 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1123}
1124
1125void
1126ev_child_stop (struct ev_child *w)
1127{
1128 ev_clear_pending ((W)w);
1129 if (ev_is_active (w))
1130 return;
1131
1132 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1133 ev_stop ((W)w);
1134}
1135
1136/*****************************************************************************/
1137
1138struct ev_once 3634struct ev_once
1139{ 3635{
1140 struct ev_io io; 3636 ev_io io;
1141 struct ev_timer to; 3637 ev_timer to;
1142 void (*cb)(int revents, void *arg); 3638 void (*cb)(int revents, void *arg);
1143 void *arg; 3639 void *arg;
1144}; 3640};
1145 3641
1146static void 3642static void
1147once_cb (struct ev_once *once, int revents) 3643once_cb (EV_P_ struct ev_once *once, int revents)
1148{ 3644{
1149 void (*cb)(int revents, void *arg) = once->cb; 3645 void (*cb)(int revents, void *arg) = once->cb;
1150 void *arg = once->arg; 3646 void *arg = once->arg;
1151 3647
1152 ev_io_stop (&once->io); 3648 ev_io_stop (EV_A_ &once->io);
1153 ev_timer_stop (&once->to); 3649 ev_timer_stop (EV_A_ &once->to);
1154 free (once); 3650 ev_free (once);
1155 3651
1156 cb (revents, arg); 3652 cb (revents, arg);
1157} 3653}
1158 3654
1159static void 3655static void
1160once_cb_io (struct ev_io *w, int revents) 3656once_cb_io (EV_P_ ev_io *w, int revents)
1161{ 3657{
1162 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3658 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3659
3660 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1163} 3661}
1164 3662
1165static void 3663static void
1166once_cb_to (struct ev_timer *w, int revents) 3664once_cb_to (EV_P_ ev_timer *w, int revents)
1167{ 3665{
1168 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3666 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1169}
1170 3667
3668 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3669}
3670
1171void 3671void
1172ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3672ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1173{ 3673{
1174 struct ev_once *once = malloc (sizeof (struct ev_once)); 3674 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1175 3675
1176 if (!once) 3676 if (expect_false (!once))
3677 {
1177 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3678 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1178 else 3679 return;
1179 { 3680 }
3681
1180 once->cb = cb; 3682 once->cb = cb;
1181 once->arg = arg; 3683 once->arg = arg;
1182 3684
1183 ev_watcher_init (&once->io, once_cb_io); 3685 ev_init (&once->io, once_cb_io);
1184 if (fd >= 0) 3686 if (fd >= 0)
3687 {
3688 ev_io_set (&once->io, fd, events);
3689 ev_io_start (EV_A_ &once->io);
3690 }
3691
3692 ev_init (&once->to, once_cb_to);
3693 if (timeout >= 0.)
3694 {
3695 ev_timer_set (&once->to, timeout, 0.);
3696 ev_timer_start (EV_A_ &once->to);
3697 }
3698}
3699
3700/*****************************************************************************/
3701
3702#if EV_WALK_ENABLE
3703void
3704ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3705{
3706 int i, j;
3707 ev_watcher_list *wl, *wn;
3708
3709 if (types & (EV_IO | EV_EMBED))
3710 for (i = 0; i < anfdmax; ++i)
3711 for (wl = anfds [i].head; wl; )
1185 { 3712 {
1186 ev_io_set (&once->io, fd, events); 3713 wn = wl->next;
1187 ev_io_start (&once->io); 3714
3715#if EV_EMBED_ENABLE
3716 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3717 {
3718 if (types & EV_EMBED)
3719 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3720 }
3721 else
3722#endif
3723#if EV_USE_INOTIFY
3724 if (ev_cb ((ev_io *)wl) == infy_cb)
3725 ;
3726 else
3727#endif
3728 if ((ev_io *)wl != &pipe_w)
3729 if (types & EV_IO)
3730 cb (EV_A_ EV_IO, wl);
3731
3732 wl = wn;
1188 } 3733 }
1189 3734
1190 ev_watcher_init (&once->to, once_cb_to); 3735 if (types & (EV_TIMER | EV_STAT))
1191 if (timeout >= 0.) 3736 for (i = timercnt + HEAP0; i-- > HEAP0; )
3737#if EV_STAT_ENABLE
3738 /*TODO: timer is not always active*/
3739 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1192 { 3740 {
1193 ev_timer_set (&once->to, timeout, 0.); 3741 if (types & EV_STAT)
1194 ev_timer_start (&once->to); 3742 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1195 } 3743 }
1196 } 3744 else
1197} 3745#endif
3746 if (types & EV_TIMER)
3747 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1198 3748
1199/*****************************************************************************/ 3749#if EV_PERIODIC_ENABLE
3750 if (types & EV_PERIODIC)
3751 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3752 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3753#endif
1200 3754
1201#if 0 3755#if EV_IDLE_ENABLE
3756 if (types & EV_IDLE)
3757 for (j = NUMPRI; i--; )
3758 for (i = idlecnt [j]; i--; )
3759 cb (EV_A_ EV_IDLE, idles [j][i]);
3760#endif
1202 3761
1203struct ev_io wio; 3762#if EV_FORK_ENABLE
3763 if (types & EV_FORK)
3764 for (i = forkcnt; i--; )
3765 if (ev_cb (forks [i]) != embed_fork_cb)
3766 cb (EV_A_ EV_FORK, forks [i]);
3767#endif
1204 3768
1205static void 3769#if EV_ASYNC_ENABLE
1206sin_cb (struct ev_io *w, int revents) 3770 if (types & EV_ASYNC)
1207{ 3771 for (i = asynccnt; i--; )
1208 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3772 cb (EV_A_ EV_ASYNC, asyncs [i]);
1209} 3773#endif
1210 3774
1211static void 3775#if EV_PREPARE_ENABLE
1212ocb (struct ev_timer *w, int revents) 3776 if (types & EV_PREPARE)
1213{ 3777 for (i = preparecnt; i--; )
1214 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3778# if EV_EMBED_ENABLE
1215 ev_timer_stop (w); 3779 if (ev_cb (prepares [i]) != embed_prepare_cb)
1216 ev_timer_start (w);
1217}
1218
1219static void
1220scb (struct ev_signal *w, int revents)
1221{
1222 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1223 ev_io_stop (&wio);
1224 ev_io_start (&wio);
1225}
1226
1227static void
1228gcb (struct ev_signal *w, int revents)
1229{
1230 fprintf (stderr, "generic %x\n", revents);
1231
1232}
1233
1234int main (void)
1235{
1236 ev_init (0);
1237
1238 ev_io_init (&wio, sin_cb, 0, EV_READ);
1239 ev_io_start (&wio);
1240
1241 struct ev_timer t[10000];
1242
1243#if 0
1244 int i;
1245 for (i = 0; i < 10000; ++i)
1246 {
1247 struct ev_timer *w = t + i;
1248 ev_watcher_init (w, ocb, i);
1249 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1250 ev_timer_start (w);
1251 if (drand48 () < 0.5)
1252 ev_timer_stop (w);
1253 }
1254#endif 3780# endif
1255 3781 cb (EV_A_ EV_PREPARE, prepares [i]);
1256 struct ev_timer t1;
1257 ev_timer_init (&t1, ocb, 5, 10);
1258 ev_timer_start (&t1);
1259
1260 struct ev_signal sig;
1261 ev_signal_init (&sig, scb, SIGQUIT);
1262 ev_signal_start (&sig);
1263
1264 struct ev_check cw;
1265 ev_check_init (&cw, gcb);
1266 ev_check_start (&cw);
1267
1268 struct ev_idle iw;
1269 ev_idle_init (&iw, gcb);
1270 ev_idle_start (&iw);
1271
1272 ev_loop (0);
1273
1274 return 0;
1275}
1276
1277#endif 3782#endif
1278 3783
3784#if EV_CHECK_ENABLE
3785 if (types & EV_CHECK)
3786 for (i = checkcnt; i--; )
3787 cb (EV_A_ EV_CHECK, checks [i]);
3788#endif
1279 3789
3790#if EV_SIGNAL_ENABLE
3791 if (types & EV_SIGNAL)
3792 for (i = 0; i < EV_NSIG - 1; ++i)
3793 for (wl = signals [i].head; wl; )
3794 {
3795 wn = wl->next;
3796 cb (EV_A_ EV_SIGNAL, wl);
3797 wl = wn;
3798 }
3799#endif
1280 3800
3801#if EV_CHILD_ENABLE
3802 if (types & EV_CHILD)
3803 for (i = (EV_PID_HASHSIZE); i--; )
3804 for (wl = childs [i]; wl; )
3805 {
3806 wn = wl->next;
3807 cb (EV_A_ EV_CHILD, wl);
3808 wl = wn;
3809 }
3810#endif
3811/* EV_STAT 0x00001000 /* stat data changed */
3812/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3813}
3814#endif
1281 3815
3816#if EV_MULTIPLICITY
3817 #include "ev_wrap.h"
3818#endif
3819
3820EV_CPP(})
3821

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