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Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.365 by root, Sun Oct 31 22:01:20 2010 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 45# include "config.h"
46# endif
47
48# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0
53# endif
54# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1
56# endif
57# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL)
59# define EV_USE_CLOCK_SYSCALL 0
60# endif
61
62# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC
64# define EV_USE_MONOTONIC 1
65# endif
66# ifndef EV_USE_REALTIME
67# define EV_USE_REALTIME 0
68# endif
69# else
70# ifndef EV_USE_MONOTONIC
71# define EV_USE_MONOTONIC 0
72# endif
73# ifndef EV_USE_REALTIME
74# define EV_USE_REALTIME 0
75# endif
76# endif
77
78# if HAVE_NANOSLEEP
79# ifndef EV_USE_NANOSLEEP
80# define EV_USE_NANOSLEEP EV_FEATURE_OS
81# endif
82# else
83# undef EV_USE_NANOSLEEP
84# define EV_USE_NANOSLEEP 0
85# endif
86
87# if HAVE_SELECT && HAVE_SYS_SELECT_H
88# ifndef EV_USE_SELECT
89# define EV_USE_SELECT EV_FEATURE_BACKENDS
90# endif
91# else
92# undef EV_USE_SELECT
93# define EV_USE_SELECT 0
94# endif
95
96# if HAVE_POLL && HAVE_POLL_H
97# ifndef EV_USE_POLL
98# define EV_USE_POLL EV_FEATURE_BACKENDS
99# endif
100# else
101# undef EV_USE_POLL
102# define EV_USE_POLL 0
103# endif
104
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# ifndef EV_USE_EPOLL
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif
109# else
110# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0
112# endif
113
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# endif
118# else
119# undef EV_USE_KQUEUE
120# define EV_USE_KQUEUE 0
121# endif
122
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# ifndef EV_USE_PORT
125# define EV_USE_PORT EV_FEATURE_BACKENDS
126# endif
127# else
128# undef EV_USE_PORT
129# define EV_USE_PORT 0
130# endif
131
132# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
133# ifndef EV_USE_INOTIFY
134# define EV_USE_INOTIFY EV_FEATURE_OS
135# endif
136# else
137# undef EV_USE_INOTIFY
138# define EV_USE_INOTIFY 0
139# endif
140
141# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
142# ifndef EV_USE_SIGNALFD
143# define EV_USE_SIGNALFD EV_FEATURE_OS
144# endif
145# else
146# undef EV_USE_SIGNALFD
147# define EV_USE_SIGNALFD 0
148# endif
149
150# if HAVE_EVENTFD
151# ifndef EV_USE_EVENTFD
152# define EV_USE_EVENTFD EV_FEATURE_OS
153# endif
154# else
155# undef EV_USE_EVENTFD
156# define EV_USE_EVENTFD 0
157# endif
158
33#endif 159#endif
34 160
35#include <math.h> 161#include <math.h>
36#include <stdlib.h> 162#include <stdlib.h>
37#include <unistd.h> 163#include <string.h>
38#include <fcntl.h> 164#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 165#include <stddef.h>
41 166
42#include <stdio.h> 167#include <stdio.h>
43 168
44#include <assert.h> 169#include <assert.h>
45#include <errno.h> 170#include <errno.h>
46#include <sys/types.h> 171#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 172#include <time.h>
173#include <limits.h>
50 174
51/**/ 175#include <signal.h>
176
177#ifdef EV_H
178# include EV_H
179#else
180# include "ev.h"
181#endif
182
183EV_CPP(extern "C" {)
184
185#ifndef _WIN32
186# include <sys/time.h>
187# include <sys/wait.h>
188# include <unistd.h>
189#else
190# include <io.h>
191# define WIN32_LEAN_AND_MEAN
192# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1
195# endif
196# undef EV_AVOID_STDIO
197#endif
198
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */
208
209/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG)
211/* use what's provided */
212#elif defined (NSIG)
213# define EV_NSIG (NSIG)
214#elif defined(_NSIG)
215# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX)
217# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX)
219# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX)
221# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG)
223# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG)
225# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE)
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig)
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else
231# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */
234# define EV_NSIG 65
235#endif
236
237#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else
241# define EV_USE_CLOCK_SYSCALL 0
242# endif
243#endif
52 244
53#ifndef EV_USE_MONOTONIC 245#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else
54# define EV_USE_MONOTONIC 1 249# define EV_USE_MONOTONIC 0
250# endif
251#endif
252
253#ifndef EV_USE_REALTIME
254# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
255#endif
256
257#ifndef EV_USE_NANOSLEEP
258# if _POSIX_C_SOURCE >= 199309L
259# define EV_USE_NANOSLEEP EV_FEATURE_OS
260# else
261# define EV_USE_NANOSLEEP 0
262# endif
55#endif 263#endif
56 264
57#ifndef EV_USE_SELECT 265#ifndef EV_USE_SELECT
58# define EV_USE_SELECT 1 266# define EV_USE_SELECT EV_FEATURE_BACKENDS
267#endif
268
269#ifndef EV_USE_POLL
270# ifdef _WIN32
271# define EV_USE_POLL 0
272# else
273# define EV_USE_POLL EV_FEATURE_BACKENDS
274# endif
59#endif 275#endif
60 276
61#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
62# define EV_USE_EPOLL 0 281# define EV_USE_EPOLL 0
63#endif 282# endif
283#endif
64 284
285#ifndef EV_USE_KQUEUE
286# define EV_USE_KQUEUE 0
287#endif
288
65#ifndef EV_USE_REALTIME 289#ifndef EV_USE_PORT
66# 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
67#endif 298# endif
299#endif
68 300
69/**/ 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
70 364
71#ifndef CLOCK_MONOTONIC 365#ifndef CLOCK_MONOTONIC
72# undef EV_USE_MONOTONIC 366# undef EV_USE_MONOTONIC
73# define EV_USE_MONOTONIC 0 367# define EV_USE_MONOTONIC 0
74#endif 368#endif
… …
76#ifndef CLOCK_REALTIME 370#ifndef CLOCK_REALTIME
77# undef EV_USE_REALTIME 371# undef EV_USE_REALTIME
78# define EV_USE_REALTIME 0 372# define EV_USE_REALTIME 0
79#endif 373#endif
80 374
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
81/**/ 438/**/
82 439
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
83#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) */
84#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) */
85#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
86/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
87 458
88#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)
89 461
90#if __GNUC__ >= 3 462#if __GNUC__ >= 4
91# define expect(expr,value) __builtin_expect ((expr),(value)) 463# define expect(expr,value) __builtin_expect ((expr),(value))
92# define inline inline 464# define noinline __attribute__ ((noinline))
93#else 465#else
94# define expect(expr,value) (expr) 466# define expect(expr,value) (expr)
95# define inline static 467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif
96#endif 471#endif
97 472
98#define expect_false(expr) expect ((expr) != 0, 0) 473#define expect_false(expr) expect ((expr) != 0, 0)
99#define expect_true(expr) expect ((expr) != 0, 1) 474#define expect_true(expr) expect ((expr) != 0, 1)
475#define inline_size static inline
100 476
477#if EV_FEATURE_CODE
478# define inline_speed static inline
479#else
480# define inline_speed static noinline
481#endif
482
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
484
485#if EV_MINPRI == EV_MAXPRI
486# define ABSPRI(w) (((W)w), 0)
487#else
488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif
490
491#define EMPTY /* required for microsofts broken pseudo-c compiler */
492#define EMPTY2(a,b) /* used to suppress some warnings */
493
101typedef struct ev_watcher *W; 494typedef ev_watcher *W;
102typedef struct ev_watcher_list *WL; 495typedef ev_watcher_list *WL;
103typedef struct ev_watcher_time *WT; 496typedef ev_watcher_time *WT;
104 497
105static ev_tstamp now_floor, now, diff; /* monotonic clock */ 498#define ev_active(w) ((W)(w))->active
106ev_tstamp ev_now; 499#define ev_at(w) ((WT)(w))->at
107int ev_method;
108 500
109static 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
110 506
111static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 507#if EV_USE_MONOTONIC
112static void (*method_modify)(int fd, int oev, int nev); 508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
113static 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
114 524
115/*****************************************************************************/ 525/*****************************************************************************/
116 526
527#ifdef __linux
528# include <sys/utsname.h>
529#endif
530
531static unsigned int noinline
532ev_linux_version (void)
533{
534#ifdef __linux
535 unsigned int v = 0;
536 struct utsname buf;
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 ev_printerr (msg);
597 ev_printerr (": ");
598 ev_printerr (strerror (errno));
599 ev_printerr ("\n");
600#else
601 perror (msg);
602#endif
603 abort ();
604 }
605}
606
607static void *
608ev_realloc_emul (void *ptr, long size)
609{
610#if __GLIBC__
611 return realloc (ptr, size);
612#else
613 /* some systems, notably openbsd and darwin, fail to properly
614 * implement realloc (x, 0) (as required by both ansi c-89 and
615 * the single unix specification, so work around them here.
616 */
617
618 if (size)
619 return realloc (ptr, size);
620
621 free (ptr);
622 return 0;
623#endif
624}
625
626static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
627
628void
629ev_set_allocator (void *(*cb)(void *ptr, long size))
630{
631 alloc = cb;
632}
633
634inline_speed void *
635ev_realloc (void *ptr, long size)
636{
637 ptr = alloc (ptr, size);
638
639 if (!ptr && size)
640 {
641#if EV_AVOID_STDIO
642 ev_printerr ("(libev) memory allocation failed, aborting.\n");
643#else
644 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
645#endif
646 abort ();
647 }
648
649 return ptr;
650}
651
652#define ev_malloc(size) ev_realloc (0, (size))
653#define ev_free(ptr) ev_realloc ((ptr), 0)
654
655/*****************************************************************************/
656
657/* set in reify when reification needed */
658#define EV_ANFD_REIFY 1
659
660/* file descriptor info structure */
661typedef struct
662{
663 WL head;
664 unsigned char events; /* the events watched for */
665 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
666 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
667 unsigned char unused;
668#if EV_USE_EPOLL
669 unsigned int egen; /* generation counter to counter epoll bugs */
670#endif
671#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
672 SOCKET handle;
673#endif
674#if EV_USE_IOCP
675 OVERLAPPED or, ow;
676#endif
677} ANFD;
678
679/* stores the pending event set for a given watcher */
680typedef struct
681{
682 W w;
683 int events; /* the pending event set for the given watcher */
684} ANPENDING;
685
686#if EV_USE_INOTIFY
687/* hash table entry per inotify-id */
688typedef struct
689{
690 WL head;
691} ANFS;
692#endif
693
694/* Heap Entry */
695#if EV_HEAP_CACHE_AT
696 /* a heap element */
697 typedef struct {
698 ev_tstamp at;
699 WT w;
700 } ANHE;
701
702 #define ANHE_w(he) (he).w /* access watcher, read-write */
703 #define ANHE_at(he) (he).at /* access cached at, read-only */
704 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
705#else
706 /* a heap element */
707 typedef WT ANHE;
708
709 #define ANHE_w(he) (he)
710 #define ANHE_at(he) (he)->at
711 #define ANHE_at_cache(he)
712#endif
713
714#if EV_MULTIPLICITY
715
716 struct ev_loop
717 {
718 ev_tstamp ev_rt_now;
719 #define ev_rt_now ((loop)->ev_rt_now)
720 #define VAR(name,decl) decl;
721 #include "ev_vars.h"
722 #undef VAR
723 };
724 #include "ev_wrap.h"
725
726 static struct ev_loop default_loop_struct;
727 struct ev_loop *ev_default_loop_ptr;
728
729#else
730
731 ev_tstamp ev_rt_now;
732 #define VAR(name,decl) static decl;
733 #include "ev_vars.h"
734 #undef VAR
735
736 static int ev_default_loop_ptr;
737
738#endif
739
740#if EV_FEATURE_API
741# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
742# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
743# define EV_INVOKE_PENDING invoke_cb (EV_A)
744#else
745# define EV_RELEASE_CB (void)0
746# define EV_ACQUIRE_CB (void)0
747# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
748#endif
749
750#define EVBREAK_RECURSE 0x80
751
752/*****************************************************************************/
753
754#ifndef EV_HAVE_EV_TIME
117ev_tstamp 755ev_tstamp
118ev_time (void) 756ev_time (void)
119{ 757{
120#if EV_USE_REALTIME 758#if EV_USE_REALTIME
759 if (expect_true (have_realtime))
760 {
121 struct timespec ts; 761 struct timespec ts;
122 clock_gettime (CLOCK_REALTIME, &ts); 762 clock_gettime (CLOCK_REALTIME, &ts);
123 return ts.tv_sec + ts.tv_nsec * 1e-9; 763 return ts.tv_sec + ts.tv_nsec * 1e-9;
124#else 764 }
765#endif
766
125 struct timeval tv; 767 struct timeval tv;
126 gettimeofday (&tv, 0); 768 gettimeofday (&tv, 0);
127 return tv.tv_sec + tv.tv_usec * 1e-6; 769 return tv.tv_sec + tv.tv_usec * 1e-6;
128#endif
129} 770}
771#endif
130 772
131static ev_tstamp 773inline_size ev_tstamp
132get_clock (void) 774get_clock (void)
133{ 775{
134#if EV_USE_MONOTONIC 776#if EV_USE_MONOTONIC
135 if (expect_true (have_monotonic)) 777 if (expect_true (have_monotonic))
136 { 778 {
… …
141#endif 783#endif
142 784
143 return ev_time (); 785 return ev_time ();
144} 786}
145 787
146#define array_roundsize(base,n) ((n) | 4 & ~3) 788#if EV_MULTIPLICITY
789ev_tstamp
790ev_now (EV_P)
791{
792 return ev_rt_now;
793}
794#endif
147 795
148#define array_needsize(base,cur,cnt,init) \ 796void
149 if (expect_false ((cnt) > cur)) \ 797ev_sleep (ev_tstamp delay)
150 { \ 798{
151 int newcnt = cur; \ 799 if (delay > 0.)
152 do \
153 { \
154 newcnt = array_roundsize (base, newcnt << 1); \
155 } \
156 while ((cnt) > newcnt); \
157 \
158 base = realloc (base, sizeof (*base) * (newcnt)); \
159 init (base + cur, newcnt - cur); \
160 cur = newcnt; \
161 } 800 {
801#if EV_USE_NANOSLEEP
802 struct timespec ts;
803
804 EV_TS_SET (ts, delay);
805 nanosleep (&ts, 0);
806#elif defined(_WIN32)
807 Sleep ((unsigned long)(delay * 1e3));
808#else
809 struct timeval tv;
810
811 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
812 /* something not guaranteed by newer posix versions, but guaranteed */
813 /* by older ones */
814 EV_TV_SET (tv, delay);
815 select (0, 0, 0, 0, &tv);
816#endif
817 }
818}
162 819
163/*****************************************************************************/ 820/*****************************************************************************/
164 821
165typedef struct 822#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
166{
167 struct ev_io *head;
168 unsigned char events;
169 unsigned char reify;
170} ANFD;
171 823
172static ANFD *anfds; 824/* find a suitable new size for the given array, */
173static int anfdmax; 825/* hopefully by rounding to a nice-to-malloc size */
174 826inline_size int
175static void 827array_nextsize (int elem, int cur, int cnt)
176anfds_init (ANFD *base, int count)
177{ 828{
178 while (count--) 829 int ncur = cur + 1;
179 {
180 base->head = 0;
181 base->events = EV_NONE;
182 base->reify = 0;
183 830
184 ++base; 831 do
832 ncur <<= 1;
833 while (cnt > ncur);
834
835 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
836 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
185 } 837 {
186} 838 ncur *= elem;
187 839 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
188typedef struct 840 ncur = ncur - sizeof (void *) * 4;
189{ 841 ncur /= elem;
190 W w;
191 int events;
192} ANPENDING;
193
194static ANPENDING *pendings;
195static int pendingmax, pendingcnt;
196
197static void
198event (W w, int events)
199{
200 if (w->pending)
201 { 842 }
843
844 return ncur;
845}
846
847static noinline void *
848array_realloc (int elem, void *base, int *cur, int cnt)
849{
850 *cur = array_nextsize (elem, *cur, cnt);
851 return ev_realloc (base, elem * *cur);
852}
853
854#define array_init_zero(base,count) \
855 memset ((void *)(base), 0, sizeof (*(base)) * (count))
856
857#define array_needsize(type,base,cur,cnt,init) \
858 if (expect_false ((cnt) > (cur))) \
859 { \
860 int ocur_ = (cur); \
861 (base) = (type *)array_realloc \
862 (sizeof (type), (base), &(cur), (cnt)); \
863 init ((base) + (ocur_), (cur) - ocur_); \
864 }
865
866#if 0
867#define array_slim(type,stem) \
868 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
869 { \
870 stem ## max = array_roundsize (stem ## cnt >> 1); \
871 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
872 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
873 }
874#endif
875
876#define array_free(stem, idx) \
877 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
878
879/*****************************************************************************/
880
881/* dummy callback for pending events */
882static void noinline
883pendingcb (EV_P_ ev_prepare *w, int revents)
884{
885}
886
887void noinline
888ev_feed_event (EV_P_ void *w, int revents)
889{
890 W w_ = (W)w;
891 int pri = ABSPRI (w_);
892
893 if (expect_false (w_->pending))
894 pendings [pri][w_->pending - 1].events |= revents;
895 else
896 {
897 w_->pending = ++pendingcnt [pri];
898 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
899 pendings [pri][w_->pending - 1].w = w_;
202 pendings [w->pending - 1].events |= events; 900 pendings [pri][w_->pending - 1].events = revents;
203 return;
204 } 901 }
205
206 w->pending = ++pendingcnt;
207 array_needsize (pendings, pendingmax, pendingcnt, );
208 pendings [pendingcnt - 1].w = w;
209 pendings [pendingcnt - 1].events = events;
210} 902}
211 903
212static void 904inline_speed void
905feed_reverse (EV_P_ W w)
906{
907 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
908 rfeeds [rfeedcnt++] = w;
909}
910
911inline_size void
912feed_reverse_done (EV_P_ int revents)
913{
914 do
915 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
916 while (rfeedcnt);
917}
918
919inline_speed void
213queue_events (W *events, int eventcnt, int type) 920queue_events (EV_P_ W *events, int eventcnt, int type)
214{ 921{
215 int i; 922 int i;
216 923
217 for (i = 0; i < eventcnt; ++i) 924 for (i = 0; i < eventcnt; ++i)
218 event (events [i], type); 925 ev_feed_event (EV_A_ events [i], type);
219} 926}
220 927
221static void 928/*****************************************************************************/
929
930inline_speed void
222fd_event (int fd, int events) 931fd_event_nocheck (EV_P_ int fd, int revents)
223{ 932{
224 ANFD *anfd = anfds + fd; 933 ANFD *anfd = anfds + fd;
225 struct ev_io *w; 934 ev_io *w;
226 935
227 for (w = anfd->head; w; w = w->next) 936 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
228 { 937 {
229 int ev = w->events & events; 938 int ev = w->events & revents;
230 939
231 if (ev) 940 if (ev)
232 event ((W)w, ev); 941 ev_feed_event (EV_A_ (W)w, ev);
233 } 942 }
234} 943}
235 944
236/*****************************************************************************/ 945/* do not submit kernel events for fds that have reify set */
946/* because that means they changed while we were polling for new events */
947inline_speed void
948fd_event (EV_P_ int fd, int revents)
949{
950 ANFD *anfd = anfds + fd;
237 951
238static int *fdchanges; 952 if (expect_true (!anfd->reify))
239static int fdchangemax, fdchangecnt; 953 fd_event_nocheck (EV_A_ fd, revents);
954}
240 955
241static void 956void
242fd_reify (void) 957ev_feed_fd_event (EV_P_ int fd, int revents)
958{
959 if (fd >= 0 && fd < anfdmax)
960 fd_event_nocheck (EV_A_ fd, revents);
961}
962
963/* make sure the external fd watch events are in-sync */
964/* with the kernel/libev internal state */
965inline_size void
966fd_reify (EV_P)
243{ 967{
244 int i; 968 int i;
245 969
246 for (i = 0; i < fdchangecnt; ++i) 970 for (i = 0; i < fdchangecnt; ++i)
247 { 971 {
248 int fd = fdchanges [i]; 972 int fd = fdchanges [i];
249 ANFD *anfd = anfds + fd; 973 ANFD *anfd = anfds + fd;
250 struct ev_io *w; 974 ev_io *w;
251 975
252 int events = 0; 976 unsigned char o_events = anfd->events;
977 unsigned char o_reify = anfd->reify;
253 978
254 for (w = anfd->head; w; w = w->next)
255 events |= w->events;
256
257 anfd->reify = 0; 979 anfd->reify = 0;
258 980
259 if (anfd->events != events) 981#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
982 if (o_reify & EV__IOFDSET)
260 { 983 {
261 method_modify (fd, anfd->events, events); 984 unsigned long arg;
262 anfd->events = events; 985 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
986 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
987 printf ("oi %d %x\n", fd, anfd->handle);//D
263 } 988 }
989#endif
990
991 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
992 {
993 anfd->events = 0;
994
995 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
996 anfd->events |= (unsigned char)w->events;
997
998 if (o_events != anfd->events)
999 o_reify = EV__IOFDSET; /* actually |= */
1000 }
1001
1002 if (o_reify & EV__IOFDSET)
1003 backend_modify (EV_A_ fd, o_events, anfd->events);
264 } 1004 }
265 1005
266 fdchangecnt = 0; 1006 fdchangecnt = 0;
267} 1007}
268 1008
269static void 1009/* something about the given fd changed */
270fd_change (int fd) 1010inline_size void
1011fd_change (EV_P_ int fd, int flags)
271{ 1012{
272 if (anfds [fd].reify || fdchangecnt < 0) 1013 unsigned char reify = anfds [fd].reify;
273 return;
274
275 anfds [fd].reify = 1; 1014 anfds [fd].reify |= flags;
276 1015
1016 if (expect_true (!reify))
1017 {
277 ++fdchangecnt; 1018 ++fdchangecnt;
278 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1019 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
279 fdchanges [fdchangecnt - 1] = fd; 1020 fdchanges [fdchangecnt - 1] = fd;
1021 }
1022}
1023
1024/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1025inline_speed void
1026fd_kill (EV_P_ int fd)
1027{
1028 ev_io *w;
1029
1030 while ((w = (ev_io *)anfds [fd].head))
1031 {
1032 ev_io_stop (EV_A_ w);
1033 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1034 }
1035}
1036
1037/* check whether the given fd is actually valid, for error recovery */
1038inline_size int
1039fd_valid (int fd)
1040{
1041#ifdef _WIN32
1042 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1043#else
1044 return fcntl (fd, F_GETFD) != -1;
1045#endif
280} 1046}
281 1047
282/* called on EBADF to verify fds */ 1048/* called on EBADF to verify fds */
283static void 1049static void noinline
284fd_recheck (void) 1050fd_ebadf (EV_P)
285{ 1051{
286 int fd; 1052 int fd;
287 1053
288 for (fd = 0; fd < anfdmax; ++fd) 1054 for (fd = 0; fd < anfdmax; ++fd)
289 if (anfds [fd].events) 1055 if (anfds [fd].events)
290 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1056 if (!fd_valid (fd) && errno == EBADF)
291 while (anfds [fd].head) 1057 fd_kill (EV_A_ fd);
1058}
1059
1060/* called on ENOMEM in select/poll to kill some fds and retry */
1061static void noinline
1062fd_enomem (EV_P)
1063{
1064 int fd;
1065
1066 for (fd = anfdmax; fd--; )
1067 if (anfds [fd].events)
1068 {
1069 fd_kill (EV_A_ fd);
1070 break;
1071 }
1072}
1073
1074/* usually called after fork if backend needs to re-arm all fds from scratch */
1075static void noinline
1076fd_rearm_all (EV_P)
1077{
1078 int fd;
1079
1080 for (fd = 0; fd < anfdmax; ++fd)
1081 if (anfds [fd].events)
1082 {
1083 anfds [fd].events = 0;
1084 anfds [fd].emask = 0;
1085 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1086 }
1087}
1088
1089/* used to prepare libev internal fd's */
1090/* this is not fork-safe */
1091inline_speed void
1092fd_intern (int fd)
1093{
1094#ifdef _WIN32
1095 unsigned long arg = 1;
1096 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1097#else
1098 fcntl (fd, F_SETFD, FD_CLOEXEC);
1099 fcntl (fd, F_SETFL, O_NONBLOCK);
1100#endif
1101}
1102
1103/*****************************************************************************/
1104
1105/*
1106 * the heap functions want a real array index. array index 0 is guaranteed to not
1107 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1108 * the branching factor of the d-tree.
1109 */
1110
1111/*
1112 * at the moment we allow libev the luxury of two heaps,
1113 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1114 * which is more cache-efficient.
1115 * the difference is about 5% with 50000+ watchers.
1116 */
1117#if EV_USE_4HEAP
1118
1119#define DHEAP 4
1120#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1121#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1122#define UPHEAP_DONE(p,k) ((p) == (k))
1123
1124/* away from the root */
1125inline_speed void
1126downheap (ANHE *heap, int N, int k)
1127{
1128 ANHE he = heap [k];
1129 ANHE *E = heap + N + HEAP0;
1130
1131 for (;;)
1132 {
1133 ev_tstamp minat;
1134 ANHE *minpos;
1135 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1136
1137 /* find minimum child */
1138 if (expect_true (pos + DHEAP - 1 < E))
1139 {
1140 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1141 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1142 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1143 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1144 }
1145 else if (pos < E)
1146 {
1147 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1148 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1149 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1150 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1151 }
1152 else
1153 break;
1154
1155 if (ANHE_at (he) <= minat)
1156 break;
1157
1158 heap [k] = *minpos;
1159 ev_active (ANHE_w (*minpos)) = k;
1160
1161 k = minpos - heap;
1162 }
1163
1164 heap [k] = he;
1165 ev_active (ANHE_w (he)) = k;
1166}
1167
1168#else /* 4HEAP */
1169
1170#define HEAP0 1
1171#define HPARENT(k) ((k) >> 1)
1172#define UPHEAP_DONE(p,k) (!(p))
1173
1174/* away from the root */
1175inline_speed void
1176downheap (ANHE *heap, int N, int k)
1177{
1178 ANHE he = heap [k];
1179
1180 for (;;)
1181 {
1182 int c = k << 1;
1183
1184 if (c >= N + HEAP0)
1185 break;
1186
1187 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1188 ? 1 : 0;
1189
1190 if (ANHE_at (he) <= ANHE_at (heap [c]))
1191 break;
1192
1193 heap [k] = heap [c];
1194 ev_active (ANHE_w (heap [k])) = k;
1195
1196 k = c;
1197 }
1198
1199 heap [k] = he;
1200 ev_active (ANHE_w (he)) = k;
1201}
1202#endif
1203
1204/* towards the root */
1205inline_speed void
1206upheap (ANHE *heap, int k)
1207{
1208 ANHE he = heap [k];
1209
1210 for (;;)
1211 {
1212 int p = HPARENT (k);
1213
1214 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1215 break;
1216
1217 heap [k] = heap [p];
1218 ev_active (ANHE_w (heap [k])) = k;
1219 k = p;
1220 }
1221
1222 heap [k] = he;
1223 ev_active (ANHE_w (he)) = k;
1224}
1225
1226/* move an element suitably so it is in a correct place */
1227inline_size void
1228adjustheap (ANHE *heap, int N, int k)
1229{
1230 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1231 upheap (heap, k);
1232 else
1233 downheap (heap, N, k);
1234}
1235
1236/* rebuild the heap: this function is used only once and executed rarely */
1237inline_size void
1238reheap (ANHE *heap, int N)
1239{
1240 int i;
1241
1242 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1243 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1244 for (i = 0; i < N; ++i)
1245 upheap (heap, i + HEAP0);
1246}
1247
1248/*****************************************************************************/
1249
1250/* associate signal watchers to a signal signal */
1251typedef struct
1252{
1253 EV_ATOMIC_T pending;
1254#if EV_MULTIPLICITY
1255 EV_P;
1256#endif
1257 WL head;
1258} ANSIG;
1259
1260static ANSIG signals [EV_NSIG - 1];
1261
1262/*****************************************************************************/
1263
1264#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1265
1266static void noinline
1267evpipe_init (EV_P)
1268{
1269 if (!ev_is_active (&pipe_w))
1270 {
1271# if EV_USE_EVENTFD
1272 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1273 if (evfd < 0 && errno == EINVAL)
1274 evfd = eventfd (0, 0);
1275
1276 if (evfd >= 0)
1277 {
1278 evpipe [0] = -1;
1279 fd_intern (evfd); /* doing it twice doesn't hurt */
1280 ev_io_set (&pipe_w, evfd, EV_READ);
1281 }
1282 else
1283# endif
1284 {
1285 while (pipe (evpipe))
1286 ev_syserr ("(libev) error creating signal/async pipe");
1287
1288 fd_intern (evpipe [0]);
1289 fd_intern (evpipe [1]);
1290 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1291 }
1292
1293 ev_io_start (EV_A_ &pipe_w);
1294 ev_unref (EV_A); /* watcher should not keep loop alive */
1295 }
1296}
1297
1298inline_size void
1299evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1300{
1301 if (!*flag)
1302 {
1303 int old_errno = errno; /* save errno because write might clobber it */
1304 char dummy;
1305
1306 *flag = 1;
1307
1308#if EV_USE_EVENTFD
1309 if (evfd >= 0)
1310 {
1311 uint64_t counter = 1;
1312 write (evfd, &counter, sizeof (uint64_t));
1313 }
1314 else
1315#endif
1316 /* win32 people keep sending patches that change this write() to send() */
1317 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1318 /* so when you think this write should be a send instead, please find out */
1319 /* where your send() is from - it's definitely not the microsoft send, and */
1320 /* tell me. thank you. */
1321 write (evpipe [1], &dummy, 1);
1322
1323 errno = old_errno;
1324 }
1325}
1326
1327/* called whenever the libev signal pipe */
1328/* got some events (signal, async) */
1329static void
1330pipecb (EV_P_ ev_io *iow, int revents)
1331{
1332 int i;
1333
1334#if EV_USE_EVENTFD
1335 if (evfd >= 0)
1336 {
1337 uint64_t counter;
1338 read (evfd, &counter, sizeof (uint64_t));
1339 }
1340 else
1341#endif
1342 {
1343 char dummy;
1344 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1345 read (evpipe [0], &dummy, 1);
1346 }
1347
1348 if (sig_pending)
1349 {
1350 sig_pending = 0;
1351
1352 for (i = EV_NSIG - 1; i--; )
1353 if (expect_false (signals [i].pending))
1354 ev_feed_signal_event (EV_A_ i + 1);
1355 }
1356
1357#if EV_ASYNC_ENABLE
1358 if (async_pending)
1359 {
1360 async_pending = 0;
1361
1362 for (i = asynccnt; i--; )
1363 if (asyncs [i]->sent)
292 { 1364 {
293 ev_io_stop (anfds [fd].head); 1365 asyncs [i]->sent = 0;
294 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); 1366 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
295 } 1367 }
1368 }
1369#endif
296} 1370}
297 1371
298/*****************************************************************************/ 1372/*****************************************************************************/
299 1373
300static struct ev_timer **timers;
301static int timermax, timercnt;
302
303static struct ev_periodic **periodics;
304static int periodicmax, periodiccnt;
305
306static void 1374static void
307upheap (WT *timers, int k) 1375ev_sighandler (int signum)
308{ 1376{
309 WT w = timers [k]; 1377#if EV_MULTIPLICITY
1378 EV_P = signals [signum - 1].loop;
1379#endif
310 1380
311 while (k && timers [k >> 1]->at > w->at) 1381#ifdef _WIN32
312 { 1382 signal (signum, ev_sighandler);
313 timers [k] = timers [k >> 1]; 1383#endif
314 timers [k]->active = k + 1;
315 k >>= 1;
316 }
317 1384
318 timers [k] = w; 1385 signals [signum - 1].pending = 1;
319 timers [k]->active = k + 1; 1386 evpipe_write (EV_A_ &sig_pending);
320
321} 1387}
322 1388
1389void noinline
1390ev_feed_signal_event (EV_P_ int signum)
1391{
1392 WL w;
1393
1394 if (expect_false (signum <= 0 || signum > EV_NSIG))
1395 return;
1396
1397 --signum;
1398
1399#if EV_MULTIPLICITY
1400 /* it is permissible to try to feed a signal to the wrong loop */
1401 /* or, likely more useful, feeding a signal nobody is waiting for */
1402
1403 if (expect_false (signals [signum].loop != EV_A))
1404 return;
1405#endif
1406
1407 signals [signum].pending = 0;
1408
1409 for (w = signals [signum].head; w; w = w->next)
1410 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1411}
1412
1413#if EV_USE_SIGNALFD
323static void 1414static void
324downheap (WT *timers, int N, int k) 1415sigfdcb (EV_P_ ev_io *iow, int revents)
325{ 1416{
326 WT w = timers [k]; 1417 struct signalfd_siginfo si[2], *sip; /* these structs are big */
327 1418
328 while (k < (N >> 1)) 1419 for (;;)
329 { 1420 {
330 int j = k << 1; 1421 ssize_t res = read (sigfd, si, sizeof (si));
331 1422
332 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1423 /* not ISO-C, as res might be -1, but works with SuS */
333 ++j; 1424 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1425 ev_feed_signal_event (EV_A_ sip->ssi_signo);
334 1426
335 if (w->at <= timers [j]->at) 1427 if (res < (ssize_t)sizeof (si))
336 break; 1428 break;
337
338 timers [k] = timers [j];
339 timers [k]->active = k + 1;
340 k = j;
341 } 1429 }
342
343 timers [k] = w;
344 timers [k]->active = k + 1;
345} 1430}
1431#endif
1432
1433#endif
346 1434
347/*****************************************************************************/ 1435/*****************************************************************************/
348 1436
349typedef struct 1437#if EV_CHILD_ENABLE
350{ 1438static WL childs [EV_PID_HASHSIZE];
351 struct ev_signal *head;
352 sig_atomic_t volatile gotsig;
353} ANSIG;
354 1439
355static ANSIG *signals;
356static int signalmax;
357
358static int sigpipe [2];
359static sig_atomic_t volatile gotsig;
360static struct ev_io sigev;
361
362static void
363signals_init (ANSIG *base, int count)
364{
365 while (count--)
366 {
367 base->head = 0;
368 base->gotsig = 0;
369
370 ++base;
371 }
372}
373
374static void
375sighandler (int signum)
376{
377 signals [signum - 1].gotsig = 1;
378
379 if (!gotsig)
380 {
381 gotsig = 1;
382 write (sigpipe [1], &signum, 1);
383 }
384}
385
386static void
387sigcb (struct ev_io *iow, int revents)
388{
389 struct ev_signal *w;
390 int signum;
391
392 read (sigpipe [0], &revents, 1);
393 gotsig = 0;
394
395 for (signum = signalmax; signum--; )
396 if (signals [signum].gotsig)
397 {
398 signals [signum].gotsig = 0;
399
400 for (w = signals [signum].head; w; w = w->next)
401 event ((W)w, EV_SIGNAL);
402 }
403}
404
405static void
406siginit (void)
407{
408 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410
411 /* rather than sort out wether we really need nb, set it */
412 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
414
415 ev_io_set (&sigev, sigpipe [0], EV_READ);
416 ev_io_start (&sigev);
417}
418
419/*****************************************************************************/
420
421static struct ev_idle **idles;
422static int idlemax, idlecnt;
423
424static struct ev_prepare **prepares;
425static int preparemax, preparecnt;
426
427static struct ev_check **checks;
428static int checkmax, checkcnt;
429
430/*****************************************************************************/
431
432static struct ev_child *childs [PID_HASHSIZE];
433static struct ev_signal childev; 1440static ev_signal childev;
1441
1442#ifndef WIFCONTINUED
1443# define WIFCONTINUED(status) 0
1444#endif
1445
1446/* handle a single child status event */
1447inline_speed void
1448child_reap (EV_P_ int chain, int pid, int status)
1449{
1450 ev_child *w;
1451 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1452
1453 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1454 {
1455 if ((w->pid == pid || !w->pid)
1456 && (!traced || (w->flags & 1)))
1457 {
1458 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1459 w->rpid = pid;
1460 w->rstatus = status;
1461 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1462 }
1463 }
1464}
434 1465
435#ifndef WCONTINUED 1466#ifndef WCONTINUED
436# define WCONTINUED 0 1467# define WCONTINUED 0
437#endif 1468#endif
438 1469
1470/* called on sigchld etc., calls waitpid */
439static void 1471static void
440childcb (struct ev_signal *sw, int revents) 1472childcb (EV_P_ ev_signal *sw, int revents)
441{ 1473{
442 struct ev_child *w;
443 int pid, status; 1474 int pid, status;
444 1475
1476 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
445 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1477 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
446 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1478 if (!WCONTINUED
447 if (w->pid == pid || !w->pid) 1479 || errno != EINVAL
448 { 1480 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
449 w->status = status; 1481 return;
450 event ((W)w, EV_CHILD); 1482
451 } 1483 /* make sure we are called again until all children have been reaped */
1484 /* we need to do it this way so that the callback gets called before we continue */
1485 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1486
1487 child_reap (EV_A_ pid, pid, status);
1488 if ((EV_PID_HASHSIZE) > 1)
1489 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
452} 1490}
1491
1492#endif
453 1493
454/*****************************************************************************/ 1494/*****************************************************************************/
455 1495
1496#if EV_USE_IOCP
1497# include "ev_iocp.c"
1498#endif
1499#if EV_USE_PORT
1500# include "ev_port.c"
1501#endif
1502#if EV_USE_KQUEUE
1503# include "ev_kqueue.c"
1504#endif
456#if EV_USE_EPOLL 1505#if EV_USE_EPOLL
457# include "ev_epoll.c" 1506# include "ev_epoll.c"
458#endif 1507#endif
1508#if EV_USE_POLL
1509# include "ev_poll.c"
1510#endif
459#if EV_USE_SELECT 1511#if EV_USE_SELECT
460# include "ev_select.c" 1512# include "ev_select.c"
461#endif 1513#endif
462 1514
463int 1515int
… …
470ev_version_minor (void) 1522ev_version_minor (void)
471{ 1523{
472 return EV_VERSION_MINOR; 1524 return EV_VERSION_MINOR;
473} 1525}
474 1526
475int ev_init (int flags) 1527/* return true if we are running with elevated privileges and should ignore env variables */
1528int inline_size
1529enable_secure (void)
476{ 1530{
477 if (!ev_method) 1531#ifdef _WIN32
1532 return 0;
1533#else
1534 return getuid () != geteuid ()
1535 || getgid () != getegid ();
1536#endif
1537}
1538
1539unsigned int
1540ev_supported_backends (void)
1541{
1542 unsigned int flags = 0;
1543
1544 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1545 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1546 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1547 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1548 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1549
1550 return flags;
1551}
1552
1553unsigned int
1554ev_recommended_backends (void)
1555{
1556 unsigned int flags = ev_supported_backends ();
1557
1558#ifndef __NetBSD__
1559 /* kqueue is borked on everything but netbsd apparently */
1560 /* it usually doesn't work correctly on anything but sockets and pipes */
1561 flags &= ~EVBACKEND_KQUEUE;
1562#endif
1563#ifdef __APPLE__
1564 /* only select works correctly on that "unix-certified" platform */
1565 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1566 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1567#endif
1568#ifdef __FreeBSD__
1569 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1570#endif
1571
1572 return flags;
1573}
1574
1575unsigned int
1576ev_embeddable_backends (void)
1577{
1578 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1579
1580 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1581 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1582 flags &= ~EVBACKEND_EPOLL;
1583
1584 return flags;
1585}
1586
1587unsigned int
1588ev_backend (EV_P)
1589{
1590 return backend;
1591}
1592
1593#if EV_FEATURE_API
1594unsigned int
1595ev_iteration (EV_P)
1596{
1597 return loop_count;
1598}
1599
1600unsigned int
1601ev_depth (EV_P)
1602{
1603 return loop_depth;
1604}
1605
1606void
1607ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1608{
1609 io_blocktime = interval;
1610}
1611
1612void
1613ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1614{
1615 timeout_blocktime = interval;
1616}
1617
1618void
1619ev_set_userdata (EV_P_ void *data)
1620{
1621 userdata = data;
1622}
1623
1624void *
1625ev_userdata (EV_P)
1626{
1627 return userdata;
1628}
1629
1630void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1631{
1632 invoke_cb = invoke_pending_cb;
1633}
1634
1635void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1636{
1637 release_cb = release;
1638 acquire_cb = acquire;
1639}
1640#endif
1641
1642/* initialise a loop structure, must be zero-initialised */
1643static void noinline
1644loop_init (EV_P_ unsigned int flags)
1645{
1646 if (!backend)
478 { 1647 {
1648#if EV_USE_REALTIME
1649 if (!have_realtime)
1650 {
1651 struct timespec ts;
1652
1653 if (!clock_gettime (CLOCK_REALTIME, &ts))
1654 have_realtime = 1;
1655 }
1656#endif
1657
479#if EV_USE_MONOTONIC 1658#if EV_USE_MONOTONIC
1659 if (!have_monotonic)
1660 {
1661 struct timespec ts;
1662
1663 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1664 have_monotonic = 1;
1665 }
1666#endif
1667
1668 /* pid check not overridable via env */
1669#ifndef _WIN32
1670 if (flags & EVFLAG_FORKCHECK)
1671 curpid = getpid ();
1672#endif
1673
1674 if (!(flags & EVFLAG_NOENV)
1675 && !enable_secure ()
1676 && getenv ("LIBEV_FLAGS"))
1677 flags = atoi (getenv ("LIBEV_FLAGS"));
1678
1679 ev_rt_now = ev_time ();
1680 mn_now = get_clock ();
1681 now_floor = mn_now;
1682 rtmn_diff = ev_rt_now - mn_now;
1683#if EV_FEATURE_API
1684 invoke_cb = ev_invoke_pending;
1685#endif
1686
1687 io_blocktime = 0.;
1688 timeout_blocktime = 0.;
1689 backend = 0;
1690 backend_fd = -1;
1691 sig_pending = 0;
1692#if EV_ASYNC_ENABLE
1693 async_pending = 0;
1694#endif
1695#if EV_USE_INOTIFY
1696 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1697#endif
1698#if EV_USE_SIGNALFD
1699 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1700#endif
1701
1702 if (!(flags & 0x0000ffffU))
1703 flags |= ev_recommended_backends ();
1704
1705#if EV_USE_IOCP
1706 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1707#endif
1708#if EV_USE_PORT
1709 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1710#endif
1711#if EV_USE_KQUEUE
1712 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1713#endif
1714#if EV_USE_EPOLL
1715 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1716#endif
1717#if EV_USE_POLL
1718 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1719#endif
1720#if EV_USE_SELECT
1721 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1722#endif
1723
1724 ev_prepare_init (&pending_w, pendingcb);
1725
1726#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1727 ev_init (&pipe_w, pipecb);
1728 ev_set_priority (&pipe_w, EV_MAXPRI);
1729#endif
1730 }
1731}
1732
1733/* free up a loop structure */
1734void
1735ev_loop_destroy (EV_P)
1736{
1737 int i;
1738
1739#if EV_MULTIPLICITY
1740 /* mimic free (0) */
1741 if (!EV_A)
1742 return;
1743#endif
1744
1745#if EV_CLEANUP_ENABLE
1746 /* queue cleanup watchers (and execute them) */
1747 if (expect_false (cleanupcnt))
1748 {
1749 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1750 EV_INVOKE_PENDING;
1751 }
1752#endif
1753
1754#if EV_CHILD_ENABLE
1755 if (ev_is_active (&childev))
1756 {
1757 ev_ref (EV_A); /* child watcher */
1758 ev_signal_stop (EV_A_ &childev);
1759 }
1760#endif
1761
1762 if (ev_is_active (&pipe_w))
1763 {
1764 /*ev_ref (EV_A);*/
1765 /*ev_io_stop (EV_A_ &pipe_w);*/
1766
1767#if EV_USE_EVENTFD
1768 if (evfd >= 0)
1769 close (evfd);
1770#endif
1771
1772 if (evpipe [0] >= 0)
1773 {
1774 EV_WIN32_CLOSE_FD (evpipe [0]);
1775 EV_WIN32_CLOSE_FD (evpipe [1]);
1776 }
1777 }
1778
1779#if EV_USE_SIGNALFD
1780 if (ev_is_active (&sigfd_w))
1781 close (sigfd);
1782#endif
1783
1784#if EV_USE_INOTIFY
1785 if (fs_fd >= 0)
1786 close (fs_fd);
1787#endif
1788
1789 if (backend_fd >= 0)
1790 close (backend_fd);
1791
1792#if EV_USE_IOCP
1793 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1794#endif
1795#if EV_USE_PORT
1796 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1797#endif
1798#if EV_USE_KQUEUE
1799 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1800#endif
1801#if EV_USE_EPOLL
1802 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1803#endif
1804#if EV_USE_POLL
1805 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1806#endif
1807#if EV_USE_SELECT
1808 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1809#endif
1810
1811 for (i = NUMPRI; i--; )
1812 {
1813 array_free (pending, [i]);
1814#if EV_IDLE_ENABLE
1815 array_free (idle, [i]);
1816#endif
1817 }
1818
1819 ev_free (anfds); anfds = 0; anfdmax = 0;
1820
1821 /* have to use the microsoft-never-gets-it-right macro */
1822 array_free (rfeed, EMPTY);
1823 array_free (fdchange, EMPTY);
1824 array_free (timer, EMPTY);
1825#if EV_PERIODIC_ENABLE
1826 array_free (periodic, EMPTY);
1827#endif
1828#if EV_FORK_ENABLE
1829 array_free (fork, EMPTY);
1830#endif
1831#if EV_CLEANUP_ENABLE
1832 array_free (cleanup, EMPTY);
1833#endif
1834 array_free (prepare, EMPTY);
1835 array_free (check, EMPTY);
1836#if EV_ASYNC_ENABLE
1837 array_free (async, EMPTY);
1838#endif
1839
1840 backend = 0;
1841
1842#if EV_MULTIPLICITY
1843 if (ev_is_default_loop (EV_A))
1844#endif
1845 ev_default_loop_ptr = 0;
1846#if EV_MULTIPLICITY
1847 else
1848 ev_free (EV_A);
1849#endif
1850}
1851
1852#if EV_USE_INOTIFY
1853inline_size void infy_fork (EV_P);
1854#endif
1855
1856inline_size void
1857loop_fork (EV_P)
1858{
1859#if EV_USE_PORT
1860 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1861#endif
1862#if EV_USE_KQUEUE
1863 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1864#endif
1865#if EV_USE_EPOLL
1866 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1867#endif
1868#if EV_USE_INOTIFY
1869 infy_fork (EV_A);
1870#endif
1871
1872 if (ev_is_active (&pipe_w))
1873 {
1874 /* this "locks" the handlers against writing to the pipe */
1875 /* while we modify the fd vars */
1876 sig_pending = 1;
1877#if EV_ASYNC_ENABLE
1878 async_pending = 1;
1879#endif
1880
1881 ev_ref (EV_A);
1882 ev_io_stop (EV_A_ &pipe_w);
1883
1884#if EV_USE_EVENTFD
1885 if (evfd >= 0)
1886 close (evfd);
1887#endif
1888
1889 if (evpipe [0] >= 0)
1890 {
1891 EV_WIN32_CLOSE_FD (evpipe [0]);
1892 EV_WIN32_CLOSE_FD (evpipe [1]);
1893 }
1894
1895#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1896 evpipe_init (EV_A);
1897 /* now iterate over everything, in case we missed something */
1898 pipecb (EV_A_ &pipe_w, EV_READ);
1899#endif
1900 }
1901
1902 postfork = 0;
1903}
1904
1905#if EV_MULTIPLICITY
1906
1907struct ev_loop *
1908ev_loop_new (unsigned int flags)
1909{
1910 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1911
1912 memset (EV_A, 0, sizeof (struct ev_loop));
1913 loop_init (EV_A_ flags);
1914
1915 if (ev_backend (EV_A))
1916 return EV_A;
1917
1918 ev_free (EV_A);
1919 return 0;
1920}
1921
1922#endif /* multiplicity */
1923
1924#if EV_VERIFY
1925static void noinline
1926verify_watcher (EV_P_ W w)
1927{
1928 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1929
1930 if (w->pending)
1931 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1932}
1933
1934static void noinline
1935verify_heap (EV_P_ ANHE *heap, int N)
1936{
1937 int i;
1938
1939 for (i = HEAP0; i < N + HEAP0; ++i)
1940 {
1941 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1942 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1943 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1944
1945 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1946 }
1947}
1948
1949static void noinline
1950array_verify (EV_P_ W *ws, int cnt)
1951{
1952 while (cnt--)
1953 {
1954 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1955 verify_watcher (EV_A_ ws [cnt]);
1956 }
1957}
1958#endif
1959
1960#if EV_FEATURE_API
1961void
1962ev_verify (EV_P)
1963{
1964#if EV_VERIFY
1965 int i;
1966 WL w;
1967
1968 assert (activecnt >= -1);
1969
1970 assert (fdchangemax >= fdchangecnt);
1971 for (i = 0; i < fdchangecnt; ++i)
1972 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1973
1974 assert (anfdmax >= 0);
1975 for (i = 0; i < anfdmax; ++i)
1976 for (w = anfds [i].head; w; w = w->next)
480 { 1977 {
481 struct timespec ts; 1978 verify_watcher (EV_A_ (W)w);
482 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1979 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
483 have_monotonic = 1; 1980 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
484 } 1981 }
1982
1983 assert (timermax >= timercnt);
1984 verify_heap (EV_A_ timers, timercnt);
1985
1986#if EV_PERIODIC_ENABLE
1987 assert (periodicmax >= periodiccnt);
1988 verify_heap (EV_A_ periodics, periodiccnt);
1989#endif
1990
1991 for (i = NUMPRI; i--; )
1992 {
1993 assert (pendingmax [i] >= pendingcnt [i]);
1994#if EV_IDLE_ENABLE
1995 assert (idleall >= 0);
1996 assert (idlemax [i] >= idlecnt [i]);
1997 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1998#endif
1999 }
2000
2001#if EV_FORK_ENABLE
2002 assert (forkmax >= forkcnt);
2003 array_verify (EV_A_ (W *)forks, forkcnt);
2004#endif
2005
2006#if EV_CLEANUP_ENABLE
2007 assert (cleanupmax >= cleanupcnt);
2008 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2009#endif
2010
2011#if EV_ASYNC_ENABLE
2012 assert (asyncmax >= asynccnt);
2013 array_verify (EV_A_ (W *)asyncs, asynccnt);
2014#endif
2015
2016#if EV_PREPARE_ENABLE
2017 assert (preparemax >= preparecnt);
2018 array_verify (EV_A_ (W *)prepares, preparecnt);
2019#endif
2020
2021#if EV_CHECK_ENABLE
2022 assert (checkmax >= checkcnt);
2023 array_verify (EV_A_ (W *)checks, checkcnt);
2024#endif
2025
2026# if 0
2027#if EV_CHILD_ENABLE
2028 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2029 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2030#endif
485#endif 2031# endif
486
487 ev_now = ev_time ();
488 now = get_clock ();
489 now_floor = now;
490 diff = ev_now - now;
491
492 if (pipe (sigpipe))
493 return 0;
494
495 ev_method = EVMETHOD_NONE;
496#if EV_USE_EPOLL
497 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
498#endif 2032#endif
499#if EV_USE_SELECT 2033}
500 if (ev_method == EVMETHOD_NONE) select_init (flags);
501#endif 2034#endif
502 2035
503 if (ev_method) 2036#if EV_MULTIPLICITY
2037struct ev_loop *
2038#else
2039int
2040#endif
2041ev_default_loop (unsigned int flags)
2042{
2043 if (!ev_default_loop_ptr)
2044 {
2045#if EV_MULTIPLICITY
2046 EV_P = ev_default_loop_ptr = &default_loop_struct;
2047#else
2048 ev_default_loop_ptr = 1;
2049#endif
2050
2051 loop_init (EV_A_ flags);
2052
2053 if (ev_backend (EV_A))
504 { 2054 {
505 ev_watcher_init (&sigev, sigcb); 2055#if EV_CHILD_ENABLE
506 siginit ();
507
508 ev_signal_init (&childev, childcb, SIGCHLD); 2056 ev_signal_init (&childev, childcb, SIGCHLD);
2057 ev_set_priority (&childev, EV_MAXPRI);
509 ev_signal_start (&childev); 2058 ev_signal_start (EV_A_ &childev);
2059 ev_unref (EV_A); /* child watcher should not keep loop alive */
2060#endif
510 } 2061 }
2062 else
2063 ev_default_loop_ptr = 0;
511 } 2064 }
512 2065
513 return ev_method; 2066 return ev_default_loop_ptr;
2067}
2068
2069void
2070ev_loop_fork (EV_P)
2071{
2072 postfork = 1; /* must be in line with ev_default_fork */
514} 2073}
515 2074
516/*****************************************************************************/ 2075/*****************************************************************************/
517 2076
518void 2077void
519ev_fork_prepare (void) 2078ev_invoke (EV_P_ void *w, int revents)
520{ 2079{
521 /* nop */ 2080 EV_CB_INVOKE ((W)w, revents);
522} 2081}
523 2082
524void 2083unsigned int
525ev_fork_parent (void) 2084ev_pending_count (EV_P)
526{ 2085{
527 /* nop */ 2086 int pri;
528} 2087 unsigned int count = 0;
529 2088
530void 2089 for (pri = NUMPRI; pri--; )
531ev_fork_child (void) 2090 count += pendingcnt [pri];
2091
2092 return count;
2093}
2094
2095void noinline
2096ev_invoke_pending (EV_P)
532{ 2097{
533#if EV_USE_EPOLL 2098 int pri;
534 if (ev_method == EVMETHOD_EPOLL) 2099
535 epoll_postfork_child (); 2100 for (pri = NUMPRI; pri--; )
2101 while (pendingcnt [pri])
2102 {
2103 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2104
2105 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2106 /* ^ this is no longer true, as pending_w could be here */
2107
2108 p->w->pending = 0;
2109 EV_CB_INVOKE (p->w, p->events);
2110 EV_FREQUENT_CHECK;
2111 }
2112}
2113
2114#if EV_IDLE_ENABLE
2115/* make idle watchers pending. this handles the "call-idle */
2116/* only when higher priorities are idle" logic */
2117inline_size void
2118idle_reify (EV_P)
2119{
2120 if (expect_false (idleall))
2121 {
2122 int pri;
2123
2124 for (pri = NUMPRI; pri--; )
2125 {
2126 if (pendingcnt [pri])
2127 break;
2128
2129 if (idlecnt [pri])
2130 {
2131 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2132 break;
2133 }
2134 }
2135 }
2136}
2137#endif
2138
2139/* make timers pending */
2140inline_size void
2141timers_reify (EV_P)
2142{
2143 EV_FREQUENT_CHECK;
2144
2145 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2146 {
2147 do
2148 {
2149 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2150
2151 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2152
2153 /* first reschedule or stop timer */
2154 if (w->repeat)
2155 {
2156 ev_at (w) += w->repeat;
2157 if (ev_at (w) < mn_now)
2158 ev_at (w) = mn_now;
2159
2160 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2161
2162 ANHE_at_cache (timers [HEAP0]);
2163 downheap (timers, timercnt, HEAP0);
2164 }
2165 else
2166 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2167
2168 EV_FREQUENT_CHECK;
2169 feed_reverse (EV_A_ (W)w);
2170 }
2171 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2172
2173 feed_reverse_done (EV_A_ EV_TIMER);
2174 }
2175}
2176
2177#if EV_PERIODIC_ENABLE
2178/* make periodics pending */
2179inline_size void
2180periodics_reify (EV_P)
2181{
2182 EV_FREQUENT_CHECK;
2183
2184 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2185 {
2186 int feed_count = 0;
2187
2188 do
2189 {
2190 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2191
2192 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2193
2194 /* first reschedule or stop timer */
2195 if (w->reschedule_cb)
2196 {
2197 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2198
2199 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2200
2201 ANHE_at_cache (periodics [HEAP0]);
2202 downheap (periodics, periodiccnt, HEAP0);
2203 }
2204 else if (w->interval)
2205 {
2206 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2207 /* if next trigger time is not sufficiently in the future, put it there */
2208 /* this might happen because of floating point inexactness */
2209 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2210 {
2211 ev_at (w) += w->interval;
2212
2213 /* if interval is unreasonably low we might still have a time in the past */
2214 /* so correct this. this will make the periodic very inexact, but the user */
2215 /* has effectively asked to get triggered more often than possible */
2216 if (ev_at (w) < ev_rt_now)
2217 ev_at (w) = ev_rt_now;
2218 }
2219
2220 ANHE_at_cache (periodics [HEAP0]);
2221 downheap (periodics, periodiccnt, HEAP0);
2222 }
2223 else
2224 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2225
2226 EV_FREQUENT_CHECK;
2227 feed_reverse (EV_A_ (W)w);
2228 }
2229 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2230
2231 feed_reverse_done (EV_A_ EV_PERIODIC);
2232 }
2233}
2234
2235/* simply recalculate all periodics */
2236/* TODO: maybe ensure that at least one event happens when jumping forward? */
2237static void noinline
2238periodics_reschedule (EV_P)
2239{
2240 int i;
2241
2242 /* adjust periodics after time jump */
2243 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2244 {
2245 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2246
2247 if (w->reschedule_cb)
2248 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2249 else if (w->interval)
2250 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2251
2252 ANHE_at_cache (periodics [i]);
2253 }
2254
2255 reheap (periodics, periodiccnt);
2256}
2257#endif
2258
2259/* adjust all timers by a given offset */
2260static void noinline
2261timers_reschedule (EV_P_ ev_tstamp adjust)
2262{
2263 int i;
2264
2265 for (i = 0; i < timercnt; ++i)
2266 {
2267 ANHE *he = timers + i + HEAP0;
2268 ANHE_w (*he)->at += adjust;
2269 ANHE_at_cache (*he);
2270 }
2271}
2272
2273/* fetch new monotonic and realtime times from the kernel */
2274/* also detect if there was a timejump, and act accordingly */
2275inline_speed void
2276time_update (EV_P_ ev_tstamp max_block)
2277{
2278#if EV_USE_MONOTONIC
2279 if (expect_true (have_monotonic))
2280 {
2281 int i;
2282 ev_tstamp odiff = rtmn_diff;
2283
2284 mn_now = get_clock ();
2285
2286 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2287 /* interpolate in the meantime */
2288 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2289 {
2290 ev_rt_now = rtmn_diff + mn_now;
2291 return;
2292 }
2293
2294 now_floor = mn_now;
2295 ev_rt_now = ev_time ();
2296
2297 /* loop a few times, before making important decisions.
2298 * on the choice of "4": one iteration isn't enough,
2299 * in case we get preempted during the calls to
2300 * ev_time and get_clock. a second call is almost guaranteed
2301 * to succeed in that case, though. and looping a few more times
2302 * doesn't hurt either as we only do this on time-jumps or
2303 * in the unlikely event of having been preempted here.
2304 */
2305 for (i = 4; --i; )
2306 {
2307 rtmn_diff = ev_rt_now - mn_now;
2308
2309 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2310 return; /* all is well */
2311
2312 ev_rt_now = ev_time ();
2313 mn_now = get_clock ();
2314 now_floor = mn_now;
2315 }
2316
2317 /* no timer adjustment, as the monotonic clock doesn't jump */
2318 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2319# if EV_PERIODIC_ENABLE
2320 periodics_reschedule (EV_A);
536#endif 2321# endif
2322 }
2323 else
2324#endif
2325 {
2326 ev_rt_now = ev_time ();
537 2327
538 ev_io_stop (&sigev); 2328 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
539 close (sigpipe [0]); 2329 {
540 close (sigpipe [1]); 2330 /* adjust timers. this is easy, as the offset is the same for all of them */
541 pipe (sigpipe); 2331 timers_reschedule (EV_A_ ev_rt_now - mn_now);
542 siginit (); 2332#if EV_PERIODIC_ENABLE
2333 periodics_reschedule (EV_A);
2334#endif
2335 }
2336
2337 mn_now = ev_rt_now;
2338 }
2339}
2340
2341void
2342ev_run (EV_P_ int flags)
2343{
2344#if EV_FEATURE_API
2345 ++loop_depth;
2346#endif
2347
2348 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2349
2350 loop_done = EVBREAK_CANCEL;
2351
2352 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2353
2354 do
2355 {
2356#if EV_VERIFY >= 2
2357 ev_verify (EV_A);
2358#endif
2359
2360#ifndef _WIN32
2361 if (expect_false (curpid)) /* penalise the forking check even more */
2362 if (expect_false (getpid () != curpid))
2363 {
2364 curpid = getpid ();
2365 postfork = 1;
2366 }
2367#endif
2368
2369#if EV_FORK_ENABLE
2370 /* we might have forked, so queue fork handlers */
2371 if (expect_false (postfork))
2372 if (forkcnt)
2373 {
2374 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2375 EV_INVOKE_PENDING;
2376 }
2377#endif
2378
2379#if EV_PREPARE_ENABLE
2380 /* queue prepare watchers (and execute them) */
2381 if (expect_false (preparecnt))
2382 {
2383 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2384 EV_INVOKE_PENDING;
2385 }
2386#endif
2387
2388 if (expect_false (loop_done))
2389 break;
2390
2391 /* we might have forked, so reify kernel state if necessary */
2392 if (expect_false (postfork))
2393 loop_fork (EV_A);
2394
2395 /* update fd-related kernel structures */
2396 fd_reify (EV_A);
2397
2398 /* calculate blocking time */
2399 {
2400 ev_tstamp waittime = 0.;
2401 ev_tstamp sleeptime = 0.;
2402
2403 /* remember old timestamp for io_blocktime calculation */
2404 ev_tstamp prev_mn_now = mn_now;
2405
2406 /* update time to cancel out callback processing overhead */
2407 time_update (EV_A_ 1e100);
2408
2409 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
2410 {
2411 waittime = MAX_BLOCKTIME;
2412
2413 if (timercnt)
2414 {
2415 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2416 if (waittime > to) waittime = to;
2417 }
2418
2419#if EV_PERIODIC_ENABLE
2420 if (periodiccnt)
2421 {
2422 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2423 if (waittime > to) waittime = to;
2424 }
2425#endif
2426
2427 /* don't let timeouts decrease the waittime below timeout_blocktime */
2428 if (expect_false (waittime < timeout_blocktime))
2429 waittime = timeout_blocktime;
2430
2431 /* extra check because io_blocktime is commonly 0 */
2432 if (expect_false (io_blocktime))
2433 {
2434 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2435
2436 if (sleeptime > waittime - backend_fudge)
2437 sleeptime = waittime - backend_fudge;
2438
2439 if (expect_true (sleeptime > 0.))
2440 {
2441 ev_sleep (sleeptime);
2442 waittime -= sleeptime;
2443 }
2444 }
2445 }
2446
2447#if EV_FEATURE_API
2448 ++loop_count;
2449#endif
2450 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2451 backend_poll (EV_A_ waittime);
2452 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2453
2454 /* update ev_rt_now, do magic */
2455 time_update (EV_A_ waittime + sleeptime);
2456 }
2457
2458 /* queue pending timers and reschedule them */
2459 timers_reify (EV_A); /* relative timers called last */
2460#if EV_PERIODIC_ENABLE
2461 periodics_reify (EV_A); /* absolute timers called first */
2462#endif
2463
2464#if EV_IDLE_ENABLE
2465 /* queue idle watchers unless other events are pending */
2466 idle_reify (EV_A);
2467#endif
2468
2469#if EV_CHECK_ENABLE
2470 /* queue check watchers, to be executed first */
2471 if (expect_false (checkcnt))
2472 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2473#endif
2474
2475 EV_INVOKE_PENDING;
2476 }
2477 while (expect_true (
2478 activecnt
2479 && !loop_done
2480 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2481 ));
2482
2483 if (loop_done == EVBREAK_ONE)
2484 loop_done = EVBREAK_CANCEL;
2485
2486#if EV_FEATURE_API
2487 --loop_depth;
2488#endif
2489}
2490
2491void
2492ev_break (EV_P_ int how)
2493{
2494 loop_done = how;
2495}
2496
2497void
2498ev_ref (EV_P)
2499{
2500 ++activecnt;
2501}
2502
2503void
2504ev_unref (EV_P)
2505{
2506 --activecnt;
2507}
2508
2509void
2510ev_now_update (EV_P)
2511{
2512 time_update (EV_A_ 1e100);
2513}
2514
2515void
2516ev_suspend (EV_P)
2517{
2518 ev_now_update (EV_A);
2519}
2520
2521void
2522ev_resume (EV_P)
2523{
2524 ev_tstamp mn_prev = mn_now;
2525
2526 ev_now_update (EV_A);
2527 timers_reschedule (EV_A_ mn_now - mn_prev);
2528#if EV_PERIODIC_ENABLE
2529 /* TODO: really do this? */
2530 periodics_reschedule (EV_A);
2531#endif
543} 2532}
544 2533
545/*****************************************************************************/ 2534/*****************************************************************************/
2535/* singly-linked list management, used when the expected list length is short */
546 2536
547static void 2537inline_size void
548call_pending (void) 2538wlist_add (WL *head, WL elem)
549{ 2539{
550 while (pendingcnt) 2540 elem->next = *head;
551 { 2541 *head = elem;
552 ANPENDING *p = pendings + --pendingcnt; 2542}
553 2543
554 if (p->w) 2544inline_size void
2545wlist_del (WL *head, WL elem)
2546{
2547 while (*head)
2548 {
2549 if (expect_true (*head == elem))
555 { 2550 {
556 p->w->pending = 0; 2551 *head = elem->next;
557 p->w->cb (p->w, p->events); 2552 break;
558 } 2553 }
2554
2555 head = &(*head)->next;
2556 }
2557}
2558
2559/* internal, faster, version of ev_clear_pending */
2560inline_speed void
2561clear_pending (EV_P_ W w)
2562{
2563 if (w->pending)
559 } 2564 {
2565 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2566 w->pending = 0;
2567 }
560} 2568}
561 2569
562static void 2570int
563timers_reify (void) 2571ev_clear_pending (EV_P_ void *w)
564{ 2572{
565 while (timercnt && timers [0]->at <= now) 2573 W w_ = (W)w;
2574 int pending = w_->pending;
2575
2576 if (expect_true (pending))
2577 {
2578 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2579 p->w = (W)&pending_w;
2580 w_->pending = 0;
2581 return p->events;
2582 }
2583 else
2584 return 0;
2585}
2586
2587inline_size void
2588pri_adjust (EV_P_ W w)
2589{
2590 int pri = ev_priority (w);
2591 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2592 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2593 ev_set_priority (w, pri);
2594}
2595
2596inline_speed void
2597ev_start (EV_P_ W w, int active)
2598{
2599 pri_adjust (EV_A_ w);
2600 w->active = active;
2601 ev_ref (EV_A);
2602}
2603
2604inline_size void
2605ev_stop (EV_P_ W w)
2606{
2607 ev_unref (EV_A);
2608 w->active = 0;
2609}
2610
2611/*****************************************************************************/
2612
2613void noinline
2614ev_io_start (EV_P_ ev_io *w)
2615{
2616 int fd = w->fd;
2617
2618 if (expect_false (ev_is_active (w)))
2619 return;
2620
2621 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2622 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2623
2624 EV_FREQUENT_CHECK;
2625
2626 ev_start (EV_A_ (W)w, 1);
2627 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2628 wlist_add (&anfds[fd].head, (WL)w);
2629
2630 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2631 w->events &= ~EV__IOFDSET;
2632
2633 EV_FREQUENT_CHECK;
2634}
2635
2636void noinline
2637ev_io_stop (EV_P_ ev_io *w)
2638{
2639 clear_pending (EV_A_ (W)w);
2640 if (expect_false (!ev_is_active (w)))
2641 return;
2642
2643 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2644
2645 EV_FREQUENT_CHECK;
2646
2647 wlist_del (&anfds[w->fd].head, (WL)w);
2648 ev_stop (EV_A_ (W)w);
2649
2650 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2651
2652 EV_FREQUENT_CHECK;
2653}
2654
2655void noinline
2656ev_timer_start (EV_P_ ev_timer *w)
2657{
2658 if (expect_false (ev_is_active (w)))
2659 return;
2660
2661 ev_at (w) += mn_now;
2662
2663 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2664
2665 EV_FREQUENT_CHECK;
2666
2667 ++timercnt;
2668 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2669 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2670 ANHE_w (timers [ev_active (w)]) = (WT)w;
2671 ANHE_at_cache (timers [ev_active (w)]);
2672 upheap (timers, ev_active (w));
2673
2674 EV_FREQUENT_CHECK;
2675
2676 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2677}
2678
2679void noinline
2680ev_timer_stop (EV_P_ ev_timer *w)
2681{
2682 clear_pending (EV_A_ (W)w);
2683 if (expect_false (!ev_is_active (w)))
2684 return;
2685
2686 EV_FREQUENT_CHECK;
2687
2688 {
2689 int active = ev_active (w);
2690
2691 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2692
2693 --timercnt;
2694
2695 if (expect_true (active < timercnt + HEAP0))
566 { 2696 {
567 struct ev_timer *w = timers [0]; 2697 timers [active] = timers [timercnt + HEAP0];
2698 adjustheap (timers, timercnt, active);
2699 }
2700 }
568 2701
569 /* first reschedule or stop timer */ 2702 ev_at (w) -= mn_now;
2703
2704 ev_stop (EV_A_ (W)w);
2705
2706 EV_FREQUENT_CHECK;
2707}
2708
2709void noinline
2710ev_timer_again (EV_P_ ev_timer *w)
2711{
2712 EV_FREQUENT_CHECK;
2713
2714 if (ev_is_active (w))
2715 {
570 if (w->repeat) 2716 if (w->repeat)
571 { 2717 {
572 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
573 w->at = now + w->repeat; 2718 ev_at (w) = mn_now + w->repeat;
574 downheap ((WT *)timers, timercnt, 0); 2719 ANHE_at_cache (timers [ev_active (w)]);
2720 adjustheap (timers, timercnt, ev_active (w));
575 } 2721 }
576 else 2722 else
577 ev_timer_stop (w); /* nonrepeating: stop timer */ 2723 ev_timer_stop (EV_A_ w);
578
579 event ((W)w, EV_TIMEOUT);
580 }
581}
582
583static void
584periodics_reify (void)
585{
586 while (periodiccnt && periodics [0]->at <= ev_now)
587 { 2724 }
588 struct ev_periodic *w = periodics [0]; 2725 else if (w->repeat)
2726 {
2727 ev_at (w) = w->repeat;
2728 ev_timer_start (EV_A_ w);
2729 }
589 2730
590 /* first reschedule or stop timer */ 2731 EV_FREQUENT_CHECK;
2732}
2733
2734ev_tstamp
2735ev_timer_remaining (EV_P_ ev_timer *w)
2736{
2737 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2738}
2739
2740#if EV_PERIODIC_ENABLE
2741void noinline
2742ev_periodic_start (EV_P_ ev_periodic *w)
2743{
2744 if (expect_false (ev_is_active (w)))
2745 return;
2746
2747 if (w->reschedule_cb)
2748 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
591 if (w->interval) 2749 else if (w->interval)
2750 {
2751 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2752 /* this formula differs from the one in periodic_reify because we do not always round up */
2753 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2754 }
2755 else
2756 ev_at (w) = w->offset;
2757
2758 EV_FREQUENT_CHECK;
2759
2760 ++periodiccnt;
2761 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2762 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2763 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2764 ANHE_at_cache (periodics [ev_active (w)]);
2765 upheap (periodics, ev_active (w));
2766
2767 EV_FREQUENT_CHECK;
2768
2769 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2770}
2771
2772void noinline
2773ev_periodic_stop (EV_P_ ev_periodic *w)
2774{
2775 clear_pending (EV_A_ (W)w);
2776 if (expect_false (!ev_is_active (w)))
2777 return;
2778
2779 EV_FREQUENT_CHECK;
2780
2781 {
2782 int active = ev_active (w);
2783
2784 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2785
2786 --periodiccnt;
2787
2788 if (expect_true (active < periodiccnt + HEAP0))
2789 {
2790 periodics [active] = periodics [periodiccnt + HEAP0];
2791 adjustheap (periodics, periodiccnt, active);
2792 }
2793 }
2794
2795 ev_stop (EV_A_ (W)w);
2796
2797 EV_FREQUENT_CHECK;
2798}
2799
2800void noinline
2801ev_periodic_again (EV_P_ ev_periodic *w)
2802{
2803 /* TODO: use adjustheap and recalculation */
2804 ev_periodic_stop (EV_A_ w);
2805 ev_periodic_start (EV_A_ w);
2806}
2807#endif
2808
2809#ifndef SA_RESTART
2810# define SA_RESTART 0
2811#endif
2812
2813#if EV_SIGNAL_ENABLE
2814
2815void noinline
2816ev_signal_start (EV_P_ ev_signal *w)
2817{
2818 if (expect_false (ev_is_active (w)))
2819 return;
2820
2821 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2822
2823#if EV_MULTIPLICITY
2824 assert (("libev: a signal must not be attached to two different loops",
2825 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2826
2827 signals [w->signum - 1].loop = EV_A;
2828#endif
2829
2830 EV_FREQUENT_CHECK;
2831
2832#if EV_USE_SIGNALFD
2833 if (sigfd == -2)
2834 {
2835 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2836 if (sigfd < 0 && errno == EINVAL)
2837 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2838
2839 if (sigfd >= 0)
592 { 2840 {
593 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2841 fd_intern (sigfd); /* doing it twice will not hurt */
594 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 2842
595 downheap ((WT *)periodics, periodiccnt, 0); 2843 sigemptyset (&sigfd_set);
2844
2845 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2846 ev_set_priority (&sigfd_w, EV_MAXPRI);
2847 ev_io_start (EV_A_ &sigfd_w);
2848 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2849 }
2850 }
2851
2852 if (sigfd >= 0)
2853 {
2854 /* TODO: check .head */
2855 sigaddset (&sigfd_set, w->signum);
2856 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2857
2858 signalfd (sigfd, &sigfd_set, 0);
2859 }
2860#endif
2861
2862 ev_start (EV_A_ (W)w, 1);
2863 wlist_add (&signals [w->signum - 1].head, (WL)w);
2864
2865 if (!((WL)w)->next)
2866# if EV_USE_SIGNALFD
2867 if (sigfd < 0) /*TODO*/
2868# endif
2869 {
2870# ifdef _WIN32
2871 evpipe_init (EV_A);
2872
2873 signal (w->signum, ev_sighandler);
2874# else
2875 struct sigaction sa;
2876
2877 evpipe_init (EV_A);
2878
2879 sa.sa_handler = ev_sighandler;
2880 sigfillset (&sa.sa_mask);
2881 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2882 sigaction (w->signum, &sa, 0);
2883
2884 sigemptyset (&sa.sa_mask);
2885 sigaddset (&sa.sa_mask, w->signum);
2886 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2887#endif
2888 }
2889
2890 EV_FREQUENT_CHECK;
2891}
2892
2893void noinline
2894ev_signal_stop (EV_P_ ev_signal *w)
2895{
2896 clear_pending (EV_A_ (W)w);
2897 if (expect_false (!ev_is_active (w)))
2898 return;
2899
2900 EV_FREQUENT_CHECK;
2901
2902 wlist_del (&signals [w->signum - 1].head, (WL)w);
2903 ev_stop (EV_A_ (W)w);
2904
2905 if (!signals [w->signum - 1].head)
2906 {
2907#if EV_MULTIPLICITY
2908 signals [w->signum - 1].loop = 0; /* unattach from signal */
2909#endif
2910#if EV_USE_SIGNALFD
2911 if (sigfd >= 0)
2912 {
2913 sigset_t ss;
2914
2915 sigemptyset (&ss);
2916 sigaddset (&ss, w->signum);
2917 sigdelset (&sigfd_set, w->signum);
2918
2919 signalfd (sigfd, &sigfd_set, 0);
2920 sigprocmask (SIG_UNBLOCK, &ss, 0);
596 } 2921 }
597 else 2922 else
598 ev_periodic_stop (w); /* nonrepeating: stop timer */ 2923#endif
599 2924 signal (w->signum, SIG_DFL);
600 event ((W)w, EV_PERIODIC);
601 }
602}
603
604static void
605periodics_reschedule (ev_tstamp diff)
606{
607 int i;
608
609 /* adjust periodics after time jump */
610 for (i = 0; i < periodiccnt; ++i)
611 { 2925 }
612 struct ev_periodic *w = periodics [i];
613 2926
614 if (w->interval) 2927 EV_FREQUENT_CHECK;
2928}
2929
2930#endif
2931
2932#if EV_CHILD_ENABLE
2933
2934void
2935ev_child_start (EV_P_ ev_child *w)
2936{
2937#if EV_MULTIPLICITY
2938 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2939#endif
2940 if (expect_false (ev_is_active (w)))
2941 return;
2942
2943 EV_FREQUENT_CHECK;
2944
2945 ev_start (EV_A_ (W)w, 1);
2946 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2947
2948 EV_FREQUENT_CHECK;
2949}
2950
2951void
2952ev_child_stop (EV_P_ ev_child *w)
2953{
2954 clear_pending (EV_A_ (W)w);
2955 if (expect_false (!ev_is_active (w)))
2956 return;
2957
2958 EV_FREQUENT_CHECK;
2959
2960 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2961 ev_stop (EV_A_ (W)w);
2962
2963 EV_FREQUENT_CHECK;
2964}
2965
2966#endif
2967
2968#if EV_STAT_ENABLE
2969
2970# ifdef _WIN32
2971# undef lstat
2972# define lstat(a,b) _stati64 (a,b)
2973# endif
2974
2975#define DEF_STAT_INTERVAL 5.0074891
2976#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2977#define MIN_STAT_INTERVAL 0.1074891
2978
2979static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2980
2981#if EV_USE_INOTIFY
2982
2983/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2984# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2985
2986static void noinline
2987infy_add (EV_P_ ev_stat *w)
2988{
2989 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);
2990
2991 if (w->wd >= 0)
2992 {
2993 struct statfs sfs;
2994
2995 /* now local changes will be tracked by inotify, but remote changes won't */
2996 /* unless the filesystem is known to be local, we therefore still poll */
2997 /* also do poll on <2.6.25, but with normal frequency */
2998
2999 if (!fs_2625)
3000 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3001 else if (!statfs (w->path, &sfs)
3002 && (sfs.f_type == 0x1373 /* devfs */
3003 || sfs.f_type == 0xEF53 /* ext2/3 */
3004 || sfs.f_type == 0x3153464a /* jfs */
3005 || sfs.f_type == 0x52654973 /* reiser3 */
3006 || sfs.f_type == 0x01021994 /* tempfs */
3007 || sfs.f_type == 0x58465342 /* xfs */))
3008 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3009 else
3010 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3011 }
3012 else
3013 {
3014 /* can't use inotify, continue to stat */
3015 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3016
3017 /* if path is not there, monitor some parent directory for speedup hints */
3018 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3019 /* but an efficiency issue only */
3020 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
615 { 3021 {
616 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3022 char path [4096];
3023 strcpy (path, w->path);
617 3024
618 if (fabs (diff) >= 1e-4) 3025 do
619 { 3026 {
620 ev_periodic_stop (w); 3027 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
621 ev_periodic_start (w); 3028 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
622 3029
623 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3030 char *pend = strrchr (path, '/');
3031
3032 if (!pend || pend == path)
3033 break;
3034
3035 *pend = 0;
3036 w->wd = inotify_add_watch (fs_fd, path, mask);
3037 }
3038 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3039 }
3040 }
3041
3042 if (w->wd >= 0)
3043 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3044
3045 /* now re-arm timer, if required */
3046 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3047 ev_timer_again (EV_A_ &w->timer);
3048 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3049}
3050
3051static void noinline
3052infy_del (EV_P_ ev_stat *w)
3053{
3054 int slot;
3055 int wd = w->wd;
3056
3057 if (wd < 0)
3058 return;
3059
3060 w->wd = -2;
3061 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3062 wlist_del (&fs_hash [slot].head, (WL)w);
3063
3064 /* remove this watcher, if others are watching it, they will rearm */
3065 inotify_rm_watch (fs_fd, wd);
3066}
3067
3068static void noinline
3069infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3070{
3071 if (slot < 0)
3072 /* overflow, need to check for all hash slots */
3073 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3074 infy_wd (EV_A_ slot, wd, ev);
3075 else
3076 {
3077 WL w_;
3078
3079 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3080 {
3081 ev_stat *w = (ev_stat *)w_;
3082 w_ = w_->next; /* lets us remove this watcher and all before it */
3083
3084 if (w->wd == wd || wd == -1)
3085 {
3086 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3087 {
3088 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3089 w->wd = -1;
3090 infy_add (EV_A_ w); /* re-add, no matter what */
3091 }
3092
3093 stat_timer_cb (EV_A_ &w->timer, 0);
624 } 3094 }
625 } 3095 }
626 } 3096 }
627} 3097}
628 3098
629static int 3099static void
630time_update_monotonic (void) 3100infy_cb (EV_P_ ev_io *w, int revents)
631{ 3101{
632 now = get_clock (); 3102 char buf [EV_INOTIFY_BUFSIZE];
3103 int ofs;
3104 int len = read (fs_fd, buf, sizeof (buf));
633 3105
634 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 3106 for (ofs = 0; ofs < len; )
3107 {
3108 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3109 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3110 ofs += sizeof (struct inotify_event) + ev->len;
635 { 3111 }
636 ev_now = now + diff; 3112}
3113
3114inline_size void
3115ev_check_2625 (EV_P)
3116{
3117 /* kernels < 2.6.25 are borked
3118 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3119 */
3120 if (ev_linux_version () < 0x020619)
637 return 0; 3121 return;
3122
3123 fs_2625 = 1;
3124}
3125
3126inline_size int
3127infy_newfd (void)
3128{
3129#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3130 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3131 if (fd >= 0)
3132 return fd;
3133#endif
3134 return inotify_init ();
3135}
3136
3137inline_size void
3138infy_init (EV_P)
3139{
3140 if (fs_fd != -2)
3141 return;
3142
3143 fs_fd = -1;
3144
3145 ev_check_2625 (EV_A);
3146
3147 fs_fd = infy_newfd ();
3148
3149 if (fs_fd >= 0)
638 } 3150 {
3151 fd_intern (fs_fd);
3152 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3153 ev_set_priority (&fs_w, EV_MAXPRI);
3154 ev_io_start (EV_A_ &fs_w);
3155 ev_unref (EV_A);
3156 }
3157}
3158
3159inline_size void
3160infy_fork (EV_P)
3161{
3162 int slot;
3163
3164 if (fs_fd < 0)
3165 return;
3166
3167 ev_ref (EV_A);
3168 ev_io_stop (EV_A_ &fs_w);
3169 close (fs_fd);
3170 fs_fd = infy_newfd ();
3171
3172 if (fs_fd >= 0)
3173 {
3174 fd_intern (fs_fd);
3175 ev_io_set (&fs_w, fs_fd, EV_READ);
3176 ev_io_start (EV_A_ &fs_w);
3177 ev_unref (EV_A);
3178 }
3179
3180 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3181 {
3182 WL w_ = fs_hash [slot].head;
3183 fs_hash [slot].head = 0;
3184
3185 while (w_)
3186 {
3187 ev_stat *w = (ev_stat *)w_;
3188 w_ = w_->next; /* lets us add this watcher */
3189
3190 w->wd = -1;
3191
3192 if (fs_fd >= 0)
3193 infy_add (EV_A_ w); /* re-add, no matter what */
3194 else
3195 {
3196 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3197 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3198 ev_timer_again (EV_A_ &w->timer);
3199 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3200 }
3201 }
3202 }
3203}
3204
3205#endif
3206
3207#ifdef _WIN32
3208# define EV_LSTAT(p,b) _stati64 (p, b)
3209#else
3210# define EV_LSTAT(p,b) lstat (p, b)
3211#endif
3212
3213void
3214ev_stat_stat (EV_P_ ev_stat *w)
3215{
3216 if (lstat (w->path, &w->attr) < 0)
3217 w->attr.st_nlink = 0;
3218 else if (!w->attr.st_nlink)
3219 w->attr.st_nlink = 1;
3220}
3221
3222static void noinline
3223stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3224{
3225 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3226
3227 ev_statdata prev = w->attr;
3228 ev_stat_stat (EV_A_ w);
3229
3230 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3231 if (
3232 prev.st_dev != w->attr.st_dev
3233 || prev.st_ino != w->attr.st_ino
3234 || prev.st_mode != w->attr.st_mode
3235 || prev.st_nlink != w->attr.st_nlink
3236 || prev.st_uid != w->attr.st_uid
3237 || prev.st_gid != w->attr.st_gid
3238 || prev.st_rdev != w->attr.st_rdev
3239 || prev.st_size != w->attr.st_size
3240 || prev.st_atime != w->attr.st_atime
3241 || prev.st_mtime != w->attr.st_mtime
3242 || prev.st_ctime != w->attr.st_ctime
3243 ) {
3244 /* we only update w->prev on actual differences */
3245 /* in case we test more often than invoke the callback, */
3246 /* to ensure that prev is always different to attr */
3247 w->prev = prev;
3248
3249 #if EV_USE_INOTIFY
3250 if (fs_fd >= 0)
3251 {
3252 infy_del (EV_A_ w);
3253 infy_add (EV_A_ w);
3254 ev_stat_stat (EV_A_ w); /* avoid race... */
3255 }
3256 #endif
3257
3258 ev_feed_event (EV_A_ w, EV_STAT);
3259 }
3260}
3261
3262void
3263ev_stat_start (EV_P_ ev_stat *w)
3264{
3265 if (expect_false (ev_is_active (w)))
3266 return;
3267
3268 ev_stat_stat (EV_A_ w);
3269
3270 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3271 w->interval = MIN_STAT_INTERVAL;
3272
3273 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3274 ev_set_priority (&w->timer, ev_priority (w));
3275
3276#if EV_USE_INOTIFY
3277 infy_init (EV_A);
3278
3279 if (fs_fd >= 0)
3280 infy_add (EV_A_ w);
639 else 3281 else
3282#endif
3283 {
3284 ev_timer_again (EV_A_ &w->timer);
3285 ev_unref (EV_A);
640 { 3286 }
641 now_floor = now; 3287
642 ev_now = ev_time (); 3288 ev_start (EV_A_ (W)w, 1);
3289
3290 EV_FREQUENT_CHECK;
3291}
3292
3293void
3294ev_stat_stop (EV_P_ ev_stat *w)
3295{
3296 clear_pending (EV_A_ (W)w);
3297 if (expect_false (!ev_is_active (w)))
643 return 1; 3298 return;
3299
3300 EV_FREQUENT_CHECK;
3301
3302#if EV_USE_INOTIFY
3303 infy_del (EV_A_ w);
3304#endif
3305
3306 if (ev_is_active (&w->timer))
644 } 3307 {
3308 ev_ref (EV_A);
3309 ev_timer_stop (EV_A_ &w->timer);
3310 }
3311
3312 ev_stop (EV_A_ (W)w);
3313
3314 EV_FREQUENT_CHECK;
3315}
3316#endif
3317
3318#if EV_IDLE_ENABLE
3319void
3320ev_idle_start (EV_P_ ev_idle *w)
3321{
3322 if (expect_false (ev_is_active (w)))
3323 return;
3324
3325 pri_adjust (EV_A_ (W)w);
3326
3327 EV_FREQUENT_CHECK;
3328
3329 {
3330 int active = ++idlecnt [ABSPRI (w)];
3331
3332 ++idleall;
3333 ev_start (EV_A_ (W)w, active);
3334
3335 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3336 idles [ABSPRI (w)][active - 1] = w;
3337 }
3338
3339 EV_FREQUENT_CHECK;
3340}
3341
3342void
3343ev_idle_stop (EV_P_ ev_idle *w)
3344{
3345 clear_pending (EV_A_ (W)w);
3346 if (expect_false (!ev_is_active (w)))
3347 return;
3348
3349 EV_FREQUENT_CHECK;
3350
3351 {
3352 int active = ev_active (w);
3353
3354 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3355 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3356
3357 ev_stop (EV_A_ (W)w);
3358 --idleall;
3359 }
3360
3361 EV_FREQUENT_CHECK;
3362}
3363#endif
3364
3365#if EV_PREPARE_ENABLE
3366void
3367ev_prepare_start (EV_P_ ev_prepare *w)
3368{
3369 if (expect_false (ev_is_active (w)))
3370 return;
3371
3372 EV_FREQUENT_CHECK;
3373
3374 ev_start (EV_A_ (W)w, ++preparecnt);
3375 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3376 prepares [preparecnt - 1] = w;
3377
3378 EV_FREQUENT_CHECK;
3379}
3380
3381void
3382ev_prepare_stop (EV_P_ ev_prepare *w)
3383{
3384 clear_pending (EV_A_ (W)w);
3385 if (expect_false (!ev_is_active (w)))
3386 return;
3387
3388 EV_FREQUENT_CHECK;
3389
3390 {
3391 int active = ev_active (w);
3392
3393 prepares [active - 1] = prepares [--preparecnt];
3394 ev_active (prepares [active - 1]) = active;
3395 }
3396
3397 ev_stop (EV_A_ (W)w);
3398
3399 EV_FREQUENT_CHECK;
3400}
3401#endif
3402
3403#if EV_CHECK_ENABLE
3404void
3405ev_check_start (EV_P_ ev_check *w)
3406{
3407 if (expect_false (ev_is_active (w)))
3408 return;
3409
3410 EV_FREQUENT_CHECK;
3411
3412 ev_start (EV_A_ (W)w, ++checkcnt);
3413 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3414 checks [checkcnt - 1] = w;
3415
3416 EV_FREQUENT_CHECK;
3417}
3418
3419void
3420ev_check_stop (EV_P_ ev_check *w)
3421{
3422 clear_pending (EV_A_ (W)w);
3423 if (expect_false (!ev_is_active (w)))
3424 return;
3425
3426 EV_FREQUENT_CHECK;
3427
3428 {
3429 int active = ev_active (w);
3430
3431 checks [active - 1] = checks [--checkcnt];
3432 ev_active (checks [active - 1]) = active;
3433 }
3434
3435 ev_stop (EV_A_ (W)w);
3436
3437 EV_FREQUENT_CHECK;
3438}
3439#endif
3440
3441#if EV_EMBED_ENABLE
3442void noinline
3443ev_embed_sweep (EV_P_ ev_embed *w)
3444{
3445 ev_run (w->other, EVRUN_NOWAIT);
645} 3446}
646 3447
647static void 3448static void
648time_update (void) 3449embed_io_cb (EV_P_ ev_io *io, int revents)
649{ 3450{
650 int i; 3451 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
651 3452
652#if EV_USE_MONOTONIC 3453 if (ev_cb (w))
653 if (expect_true (have_monotonic)) 3454 ev_feed_event (EV_A_ (W)w, EV_EMBED);
654 {
655 if (time_update_monotonic ())
656 {
657 ev_tstamp odiff = diff;
658
659 for (i = 4; --i; ) /* loop a few times, before making important decisions */
660 {
661 diff = ev_now - now;
662
663 if (fabs (odiff - diff) < MIN_TIMEJUMP)
664 return; /* all is well */
665
666 ev_now = ev_time ();
667 now = get_clock ();
668 now_floor = now;
669 }
670
671 periodics_reschedule (diff - odiff);
672 /* no timer adjustment, as the monotonic clock doesn't jump */
673 }
674 }
675 else 3455 else
676#endif 3456 ev_run (w->other, EVRUN_NOWAIT);
3457}
3458
3459static void
3460embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3461{
3462 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3463
677 { 3464 {
678 ev_now = ev_time (); 3465 EV_P = w->other;
679 3466
680 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 3467 while (fdchangecnt)
681 { 3468 {
682 periodics_reschedule (ev_now - now); 3469 fd_reify (EV_A);
683 3470 ev_run (EV_A_ EVRUN_NOWAIT);
684 /* adjust timers. this is easy, as the offset is the same for all */
685 for (i = 0; i < timercnt; ++i)
686 timers [i]->at += diff;
687 } 3471 }
688
689 now = ev_now;
690 } 3472 }
691} 3473}
692 3474
693int ev_loop_done; 3475static void
694 3476embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
695void ev_loop (int flags)
696{ 3477{
697 double block; 3478 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
698 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
699 3479
700 do 3480 ev_embed_stop (EV_A_ w);
3481
701 { 3482 {
702 /* queue check watchers (and execute them) */ 3483 EV_P = w->other;
703 if (expect_false (preparecnt))
704 {
705 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
706 call_pending ();
707 }
708 3484
709 /* update fd-related kernel structures */ 3485 ev_loop_fork (EV_A);
710 fd_reify (); 3486 ev_run (EV_A_ EVRUN_NOWAIT);
711
712 /* calculate blocking time */
713
714 /* we only need this for !monotonic clockor timers, but as we basically
715 always have timers, we just calculate it always */
716#if EV_USE_MONOTONIC
717 if (expect_true (have_monotonic))
718 time_update_monotonic ();
719 else
720#endif
721 {
722 ev_now = ev_time ();
723 now = ev_now;
724 }
725
726 if (flags & EVLOOP_NONBLOCK || idlecnt)
727 block = 0.;
728 else
729 {
730 block = MAX_BLOCKTIME;
731
732 if (timercnt)
733 {
734 ev_tstamp to = timers [0]->at - now + method_fudge;
735 if (block > to) block = to;
736 }
737
738 if (periodiccnt)
739 {
740 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
741 if (block > to) block = to;
742 }
743
744 if (block < 0.) block = 0.;
745 }
746
747 method_poll (block);
748
749 /* update ev_now, do magic */
750 time_update ();
751
752 /* queue pending timers and reschedule them */
753 timers_reify (); /* relative timers called last */
754 periodics_reify (); /* absolute timers called first */
755
756 /* queue idle watchers unless io or timers are pending */
757 if (!pendingcnt)
758 queue_events ((W *)idles, idlecnt, EV_IDLE);
759
760 /* queue check watchers, to be executed first */
761 if (checkcnt)
762 queue_events ((W *)checks, checkcnt, EV_CHECK);
763
764 call_pending ();
765 } 3487 }
766 while (!ev_loop_done);
767 3488
768 if (ev_loop_done != 2) 3489 ev_embed_start (EV_A_ w);
769 ev_loop_done = 0;
770} 3490}
3491
3492#if 0
3493static void
3494embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3495{
3496 ev_idle_stop (EV_A_ idle);
3497}
3498#endif
3499
3500void
3501ev_embed_start (EV_P_ ev_embed *w)
3502{
3503 if (expect_false (ev_is_active (w)))
3504 return;
3505
3506 {
3507 EV_P = w->other;
3508 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3509 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3510 }
3511
3512 EV_FREQUENT_CHECK;
3513
3514 ev_set_priority (&w->io, ev_priority (w));
3515 ev_io_start (EV_A_ &w->io);
3516
3517 ev_prepare_init (&w->prepare, embed_prepare_cb);
3518 ev_set_priority (&w->prepare, EV_MINPRI);
3519 ev_prepare_start (EV_A_ &w->prepare);
3520
3521 ev_fork_init (&w->fork, embed_fork_cb);
3522 ev_fork_start (EV_A_ &w->fork);
3523
3524 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3525
3526 ev_start (EV_A_ (W)w, 1);
3527
3528 EV_FREQUENT_CHECK;
3529}
3530
3531void
3532ev_embed_stop (EV_P_ ev_embed *w)
3533{
3534 clear_pending (EV_A_ (W)w);
3535 if (expect_false (!ev_is_active (w)))
3536 return;
3537
3538 EV_FREQUENT_CHECK;
3539
3540 ev_io_stop (EV_A_ &w->io);
3541 ev_prepare_stop (EV_A_ &w->prepare);
3542 ev_fork_stop (EV_A_ &w->fork);
3543
3544 ev_stop (EV_A_ (W)w);
3545
3546 EV_FREQUENT_CHECK;
3547}
3548#endif
3549
3550#if EV_FORK_ENABLE
3551void
3552ev_fork_start (EV_P_ ev_fork *w)
3553{
3554 if (expect_false (ev_is_active (w)))
3555 return;
3556
3557 EV_FREQUENT_CHECK;
3558
3559 ev_start (EV_A_ (W)w, ++forkcnt);
3560 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3561 forks [forkcnt - 1] = w;
3562
3563 EV_FREQUENT_CHECK;
3564}
3565
3566void
3567ev_fork_stop (EV_P_ ev_fork *w)
3568{
3569 clear_pending (EV_A_ (W)w);
3570 if (expect_false (!ev_is_active (w)))
3571 return;
3572
3573 EV_FREQUENT_CHECK;
3574
3575 {
3576 int active = ev_active (w);
3577
3578 forks [active - 1] = forks [--forkcnt];
3579 ev_active (forks [active - 1]) = active;
3580 }
3581
3582 ev_stop (EV_A_ (W)w);
3583
3584 EV_FREQUENT_CHECK;
3585}
3586#endif
3587
3588#if EV_CLEANUP_ENABLE
3589void
3590ev_cleanup_start (EV_P_ ev_cleanup *w)
3591{
3592 if (expect_false (ev_is_active (w)))
3593 return;
3594
3595 EV_FREQUENT_CHECK;
3596
3597 ev_start (EV_A_ (W)w, ++cleanupcnt);
3598 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3599 cleanups [cleanupcnt - 1] = w;
3600
3601 /* cleanup watchers should never keep a refcount on the loop */
3602 ev_unref (EV_A);
3603 EV_FREQUENT_CHECK;
3604}
3605
3606void
3607ev_cleanup_stop (EV_P_ ev_cleanup *w)
3608{
3609 clear_pending (EV_A_ (W)w);
3610 if (expect_false (!ev_is_active (w)))
3611 return;
3612
3613 EV_FREQUENT_CHECK;
3614 ev_ref (EV_A);
3615
3616 {
3617 int active = ev_active (w);
3618
3619 cleanups [active - 1] = cleanups [--cleanupcnt];
3620 ev_active (cleanups [active - 1]) = active;
3621 }
3622
3623 ev_stop (EV_A_ (W)w);
3624
3625 EV_FREQUENT_CHECK;
3626}
3627#endif
3628
3629#if EV_ASYNC_ENABLE
3630void
3631ev_async_start (EV_P_ ev_async *w)
3632{
3633 if (expect_false (ev_is_active (w)))
3634 return;
3635
3636 w->sent = 0;
3637
3638 evpipe_init (EV_A);
3639
3640 EV_FREQUENT_CHECK;
3641
3642 ev_start (EV_A_ (W)w, ++asynccnt);
3643 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3644 asyncs [asynccnt - 1] = w;
3645
3646 EV_FREQUENT_CHECK;
3647}
3648
3649void
3650ev_async_stop (EV_P_ ev_async *w)
3651{
3652 clear_pending (EV_A_ (W)w);
3653 if (expect_false (!ev_is_active (w)))
3654 return;
3655
3656 EV_FREQUENT_CHECK;
3657
3658 {
3659 int active = ev_active (w);
3660
3661 asyncs [active - 1] = asyncs [--asynccnt];
3662 ev_active (asyncs [active - 1]) = active;
3663 }
3664
3665 ev_stop (EV_A_ (W)w);
3666
3667 EV_FREQUENT_CHECK;
3668}
3669
3670void
3671ev_async_send (EV_P_ ev_async *w)
3672{
3673 w->sent = 1;
3674 evpipe_write (EV_A_ &async_pending);
3675}
3676#endif
771 3677
772/*****************************************************************************/ 3678/*****************************************************************************/
773 3679
774static void
775wlist_add (WL *head, WL elem)
776{
777 elem->next = *head;
778 *head = elem;
779}
780
781static void
782wlist_del (WL *head, WL elem)
783{
784 while (*head)
785 {
786 if (*head == elem)
787 {
788 *head = elem->next;
789 return;
790 }
791
792 head = &(*head)->next;
793 }
794}
795
796static void
797ev_clear_pending (W w)
798{
799 if (w->pending)
800 {
801 pendings [w->pending - 1].w = 0;
802 w->pending = 0;
803 }
804}
805
806static void
807ev_start (W w, int active)
808{
809 w->active = active;
810}
811
812static void
813ev_stop (W w)
814{
815 w->active = 0;
816}
817
818/*****************************************************************************/
819
820void
821ev_io_start (struct ev_io *w)
822{
823 int fd = w->fd;
824
825 if (ev_is_active (w))
826 return;
827
828 assert (("ev_io_start called with negative fd", fd >= 0));
829
830 ev_start ((W)w, 1);
831 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
832 wlist_add ((WL *)&anfds[fd].head, (WL)w);
833
834 fd_change (fd);
835}
836
837void
838ev_io_stop (struct ev_io *w)
839{
840 ev_clear_pending ((W)w);
841 if (!ev_is_active (w))
842 return;
843
844 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
845 ev_stop ((W)w);
846
847 fd_change (w->fd);
848}
849
850void
851ev_timer_start (struct ev_timer *w)
852{
853 if (ev_is_active (w))
854 return;
855
856 w->at += now;
857
858 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
859
860 ev_start ((W)w, ++timercnt);
861 array_needsize (timers, timermax, timercnt, );
862 timers [timercnt - 1] = w;
863 upheap ((WT *)timers, timercnt - 1);
864}
865
866void
867ev_timer_stop (struct ev_timer *w)
868{
869 ev_clear_pending ((W)w);
870 if (!ev_is_active (w))
871 return;
872
873 if (w->active < timercnt--)
874 {
875 timers [w->active - 1] = timers [timercnt];
876 downheap ((WT *)timers, timercnt, w->active - 1);
877 }
878
879 w->at = w->repeat;
880
881 ev_stop ((W)w);
882}
883
884void
885ev_timer_again (struct ev_timer *w)
886{
887 if (ev_is_active (w))
888 {
889 if (w->repeat)
890 {
891 w->at = now + w->repeat;
892 downheap ((WT *)timers, timercnt, w->active - 1);
893 }
894 else
895 ev_timer_stop (w);
896 }
897 else if (w->repeat)
898 ev_timer_start (w);
899}
900
901void
902ev_periodic_start (struct ev_periodic *w)
903{
904 if (ev_is_active (w))
905 return;
906
907 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
908
909 /* this formula differs from the one in periodic_reify because we do not always round up */
910 if (w->interval)
911 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
912
913 ev_start ((W)w, ++periodiccnt);
914 array_needsize (periodics, periodicmax, periodiccnt, );
915 periodics [periodiccnt - 1] = w;
916 upheap ((WT *)periodics, periodiccnt - 1);
917}
918
919void
920ev_periodic_stop (struct ev_periodic *w)
921{
922 ev_clear_pending ((W)w);
923 if (!ev_is_active (w))
924 return;
925
926 if (w->active < periodiccnt--)
927 {
928 periodics [w->active - 1] = periodics [periodiccnt];
929 downheap ((WT *)periodics, periodiccnt, w->active - 1);
930 }
931
932 ev_stop ((W)w);
933}
934
935void
936ev_signal_start (struct ev_signal *w)
937{
938 if (ev_is_active (w))
939 return;
940
941 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
942
943 ev_start ((W)w, 1);
944 array_needsize (signals, signalmax, w->signum, signals_init);
945 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
946
947 if (!w->next)
948 {
949 struct sigaction sa;
950 sa.sa_handler = sighandler;
951 sigfillset (&sa.sa_mask);
952 sa.sa_flags = 0;
953 sigaction (w->signum, &sa, 0);
954 }
955}
956
957void
958ev_signal_stop (struct ev_signal *w)
959{
960 ev_clear_pending ((W)w);
961 if (!ev_is_active (w))
962 return;
963
964 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
965 ev_stop ((W)w);
966
967 if (!signals [w->signum - 1].head)
968 signal (w->signum, SIG_DFL);
969}
970
971void
972ev_idle_start (struct ev_idle *w)
973{
974 if (ev_is_active (w))
975 return;
976
977 ev_start ((W)w, ++idlecnt);
978 array_needsize (idles, idlemax, idlecnt, );
979 idles [idlecnt - 1] = w;
980}
981
982void
983ev_idle_stop (struct ev_idle *w)
984{
985 ev_clear_pending ((W)w);
986 if (ev_is_active (w))
987 return;
988
989 idles [w->active - 1] = idles [--idlecnt];
990 ev_stop ((W)w);
991}
992
993void
994ev_prepare_start (struct ev_prepare *w)
995{
996 if (ev_is_active (w))
997 return;
998
999 ev_start ((W)w, ++preparecnt);
1000 array_needsize (prepares, preparemax, preparecnt, );
1001 prepares [preparecnt - 1] = w;
1002}
1003
1004void
1005ev_prepare_stop (struct ev_prepare *w)
1006{
1007 ev_clear_pending ((W)w);
1008 if (ev_is_active (w))
1009 return;
1010
1011 prepares [w->active - 1] = prepares [--preparecnt];
1012 ev_stop ((W)w);
1013}
1014
1015void
1016ev_check_start (struct ev_check *w)
1017{
1018 if (ev_is_active (w))
1019 return;
1020
1021 ev_start ((W)w, ++checkcnt);
1022 array_needsize (checks, checkmax, checkcnt, );
1023 checks [checkcnt - 1] = w;
1024}
1025
1026void
1027ev_check_stop (struct ev_check *w)
1028{
1029 ev_clear_pending ((W)w);
1030 if (ev_is_active (w))
1031 return;
1032
1033 checks [w->active - 1] = checks [--checkcnt];
1034 ev_stop ((W)w);
1035}
1036
1037void
1038ev_child_start (struct ev_child *w)
1039{
1040 if (ev_is_active (w))
1041 return;
1042
1043 ev_start ((W)w, 1);
1044 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1045}
1046
1047void
1048ev_child_stop (struct ev_child *w)
1049{
1050 ev_clear_pending ((W)w);
1051 if (ev_is_active (w))
1052 return;
1053
1054 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1055 ev_stop ((W)w);
1056}
1057
1058/*****************************************************************************/
1059
1060struct ev_once 3680struct ev_once
1061{ 3681{
1062 struct ev_io io; 3682 ev_io io;
1063 struct ev_timer to; 3683 ev_timer to;
1064 void (*cb)(int revents, void *arg); 3684 void (*cb)(int revents, void *arg);
1065 void *arg; 3685 void *arg;
1066}; 3686};
1067 3687
1068static void 3688static void
1069once_cb (struct ev_once *once, int revents) 3689once_cb (EV_P_ struct ev_once *once, int revents)
1070{ 3690{
1071 void (*cb)(int revents, void *arg) = once->cb; 3691 void (*cb)(int revents, void *arg) = once->cb;
1072 void *arg = once->arg; 3692 void *arg = once->arg;
1073 3693
1074 ev_io_stop (&once->io); 3694 ev_io_stop (EV_A_ &once->io);
1075 ev_timer_stop (&once->to); 3695 ev_timer_stop (EV_A_ &once->to);
1076 free (once); 3696 ev_free (once);
1077 3697
1078 cb (revents, arg); 3698 cb (revents, arg);
1079} 3699}
1080 3700
1081static void 3701static void
1082once_cb_io (struct ev_io *w, int revents) 3702once_cb_io (EV_P_ ev_io *w, int revents)
1083{ 3703{
1084 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3704 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3705
3706 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1085} 3707}
1086 3708
1087static void 3709static void
1088once_cb_to (struct ev_timer *w, int revents) 3710once_cb_to (EV_P_ ev_timer *w, int revents)
1089{ 3711{
1090 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3712 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1091}
1092 3713
3714 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3715}
3716
1093void 3717void
1094ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3718ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1095{ 3719{
1096 struct ev_once *once = malloc (sizeof (struct ev_once)); 3720 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1097 3721
1098 if (!once) 3722 if (expect_false (!once))
3723 {
1099 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3724 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1100 else 3725 return;
1101 { 3726 }
3727
1102 once->cb = cb; 3728 once->cb = cb;
1103 once->arg = arg; 3729 once->arg = arg;
1104 3730
1105 ev_watcher_init (&once->io, once_cb_io); 3731 ev_init (&once->io, once_cb_io);
1106 if (fd >= 0) 3732 if (fd >= 0)
3733 {
3734 ev_io_set (&once->io, fd, events);
3735 ev_io_start (EV_A_ &once->io);
3736 }
3737
3738 ev_init (&once->to, once_cb_to);
3739 if (timeout >= 0.)
3740 {
3741 ev_timer_set (&once->to, timeout, 0.);
3742 ev_timer_start (EV_A_ &once->to);
3743 }
3744}
3745
3746/*****************************************************************************/
3747
3748#if EV_WALK_ENABLE
3749void
3750ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3751{
3752 int i, j;
3753 ev_watcher_list *wl, *wn;
3754
3755 if (types & (EV_IO | EV_EMBED))
3756 for (i = 0; i < anfdmax; ++i)
3757 for (wl = anfds [i].head; wl; )
1107 { 3758 {
1108 ev_io_set (&once->io, fd, events); 3759 wn = wl->next;
1109 ev_io_start (&once->io); 3760
3761#if EV_EMBED_ENABLE
3762 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3763 {
3764 if (types & EV_EMBED)
3765 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3766 }
3767 else
3768#endif
3769#if EV_USE_INOTIFY
3770 if (ev_cb ((ev_io *)wl) == infy_cb)
3771 ;
3772 else
3773#endif
3774 if ((ev_io *)wl != &pipe_w)
3775 if (types & EV_IO)
3776 cb (EV_A_ EV_IO, wl);
3777
3778 wl = wn;
1110 } 3779 }
1111 3780
1112 ev_watcher_init (&once->to, once_cb_to); 3781 if (types & (EV_TIMER | EV_STAT))
1113 if (timeout >= 0.) 3782 for (i = timercnt + HEAP0; i-- > HEAP0; )
3783#if EV_STAT_ENABLE
3784 /*TODO: timer is not always active*/
3785 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1114 { 3786 {
1115 ev_timer_set (&once->to, timeout, 0.); 3787 if (types & EV_STAT)
1116 ev_timer_start (&once->to); 3788 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1117 } 3789 }
1118 } 3790 else
1119} 3791#endif
3792 if (types & EV_TIMER)
3793 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1120 3794
1121/*****************************************************************************/ 3795#if EV_PERIODIC_ENABLE
3796 if (types & EV_PERIODIC)
3797 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3798 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3799#endif
1122 3800
1123#if 0 3801#if EV_IDLE_ENABLE
3802 if (types & EV_IDLE)
3803 for (j = NUMPRI; i--; )
3804 for (i = idlecnt [j]; i--; )
3805 cb (EV_A_ EV_IDLE, idles [j][i]);
3806#endif
1124 3807
1125struct ev_io wio; 3808#if EV_FORK_ENABLE
3809 if (types & EV_FORK)
3810 for (i = forkcnt; i--; )
3811 if (ev_cb (forks [i]) != embed_fork_cb)
3812 cb (EV_A_ EV_FORK, forks [i]);
3813#endif
1126 3814
1127static void 3815#if EV_ASYNC_ENABLE
1128sin_cb (struct ev_io *w, int revents) 3816 if (types & EV_ASYNC)
1129{ 3817 for (i = asynccnt; i--; )
1130 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3818 cb (EV_A_ EV_ASYNC, asyncs [i]);
1131} 3819#endif
1132 3820
1133static void 3821#if EV_PREPARE_ENABLE
1134ocb (struct ev_timer *w, int revents) 3822 if (types & EV_PREPARE)
1135{ 3823 for (i = preparecnt; i--; )
1136 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3824# if EV_EMBED_ENABLE
1137 ev_timer_stop (w); 3825 if (ev_cb (prepares [i]) != embed_prepare_cb)
1138 ev_timer_start (w);
1139}
1140
1141static void
1142scb (struct ev_signal *w, int revents)
1143{
1144 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1145 ev_io_stop (&wio);
1146 ev_io_start (&wio);
1147}
1148
1149static void
1150gcb (struct ev_signal *w, int revents)
1151{
1152 fprintf (stderr, "generic %x\n", revents);
1153
1154}
1155
1156int main (void)
1157{
1158 ev_init (0);
1159
1160 ev_io_init (&wio, sin_cb, 0, EV_READ);
1161 ev_io_start (&wio);
1162
1163 struct ev_timer t[10000];
1164
1165#if 0
1166 int i;
1167 for (i = 0; i < 10000; ++i)
1168 {
1169 struct ev_timer *w = t + i;
1170 ev_watcher_init (w, ocb, i);
1171 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1172 ev_timer_start (w);
1173 if (drand48 () < 0.5)
1174 ev_timer_stop (w);
1175 }
1176#endif 3826# endif
1177 3827 cb (EV_A_ EV_PREPARE, prepares [i]);
1178 struct ev_timer t1;
1179 ev_timer_init (&t1, ocb, 5, 10);
1180 ev_timer_start (&t1);
1181
1182 struct ev_signal sig;
1183 ev_signal_init (&sig, scb, SIGQUIT);
1184 ev_signal_start (&sig);
1185
1186 struct ev_check cw;
1187 ev_check_init (&cw, gcb);
1188 ev_check_start (&cw);
1189
1190 struct ev_idle iw;
1191 ev_idle_init (&iw, gcb);
1192 ev_idle_start (&iw);
1193
1194 ev_loop (0);
1195
1196 return 0;
1197}
1198
1199#endif 3828#endif
1200 3829
3830#if EV_CHECK_ENABLE
3831 if (types & EV_CHECK)
3832 for (i = checkcnt; i--; )
3833 cb (EV_A_ EV_CHECK, checks [i]);
3834#endif
1201 3835
3836#if EV_SIGNAL_ENABLE
3837 if (types & EV_SIGNAL)
3838 for (i = 0; i < EV_NSIG - 1; ++i)
3839 for (wl = signals [i].head; wl; )
3840 {
3841 wn = wl->next;
3842 cb (EV_A_ EV_SIGNAL, wl);
3843 wl = wn;
3844 }
3845#endif
1202 3846
3847#if EV_CHILD_ENABLE
3848 if (types & EV_CHILD)
3849 for (i = (EV_PID_HASHSIZE); i--; )
3850 for (wl = childs [i]; wl; )
3851 {
3852 wn = wl->next;
3853 cb (EV_A_ EV_CHILD, wl);
3854 wl = wn;
3855 }
3856#endif
3857/* EV_STAT 0x00001000 /* stat data changed */
3858/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3859}
3860#endif
1203 3861
3862#if EV_MULTIPLICITY
3863 #include "ev_wrap.h"
3864#endif
3865
3866EV_CPP(})
3867

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