ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC vs.
Revision 1.366 by root, Mon Jan 10 01:58:54 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * 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.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * 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
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
29#if EV_USE_CONFIG_H 42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
30# 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
31#endif 159#endif
32 160
33#include <math.h> 161#include <math.h>
34#include <stdlib.h> 162#include <stdlib.h>
35#include <unistd.h> 163#include <string.h>
36#include <fcntl.h> 164#include <fcntl.h>
37#include <signal.h>
38#include <stddef.h> 165#include <stddef.h>
39 166
40#include <stdio.h> 167#include <stdio.h>
41 168
42#include <assert.h> 169#include <assert.h>
43#include <errno.h> 170#include <errno.h>
44#include <sys/types.h> 171#include <sys/types.h>
45#include <sys/wait.h>
46#include <sys/time.h>
47#include <time.h> 172#include <time.h>
173#include <limits.h>
174
175#include <signal.h>
176
177#ifdef EV_H
178# include EV_H
179#else
180# include "ev.h"
181#endif
182
183EV_CPP(extern "C" {)
184
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
48 244
49#ifndef EV_USE_MONOTONIC 245#ifndef EV_USE_MONOTONIC
50# ifdef CLOCK_MONOTONIC 246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else
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
263#endif
264
265#ifndef EV_USE_SELECT
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
275#endif
276
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
281# define EV_USE_EPOLL 0
282# endif
283#endif
284
285#ifndef EV_USE_KQUEUE
286# define EV_USE_KQUEUE 0
287#endif
288
289#ifndef EV_USE_PORT
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
298# endif
299#endif
300
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
51# define EV_USE_MONOTONIC 1 350# define EV_USE_MONOTONIC 1
351# else
352# undef EV_USE_CLOCK_SYSCALL
353# define EV_USE_CLOCK_SYSCALL 0
52# endif 354# endif
53#endif 355#endif
54 356
55#ifndef EV_USE_SELECT 357/* this block fixes any misconfiguration where we know we run into trouble otherwise */
56# define EV_USE_SELECT 1
57#endif
58 358
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
59#ifndef EV_USE_EPOLL 361# undef EV_USE_POLL
60# define EV_USE_EPOLL 0 362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0
61#endif 368#endif
62 369
63#ifndef CLOCK_REALTIME 370#ifndef CLOCK_REALTIME
371# undef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 372# define EV_USE_REALTIME 0
65#endif 373#endif
66#ifndef EV_USE_REALTIME 374
67# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 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>
68#endif 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
438/**/
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 */
69 455
70#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) */
71#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ 457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
74 458
75#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)
76 461
462#if __GNUC__ >= 4
463# define expect(expr,value) __builtin_expect ((expr),(value))
464# define noinline __attribute__ ((noinline))
465#else
466# define expect(expr,value) (expr)
467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif
471#endif
472
473#define expect_false(expr) expect ((expr) != 0, 0)
474#define expect_true(expr) expect ((expr) != 0, 1)
475#define inline_size static inline
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
77typedef struct ev_watcher *W; 494typedef ev_watcher *W;
78typedef struct ev_watcher_list *WL; 495typedef ev_watcher_list *WL;
79typedef struct ev_watcher_time *WT; 496typedef ev_watcher_time *WT;
80 497
81static ev_tstamp now, diff; /* monotonic clock */ 498#define ev_active(w) ((W)(w))->active
82ev_tstamp ev_now; 499#define ev_at(w) ((WT)(w))->at
83int ev_method;
84 500
85static 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
86 506
87static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 507#if EV_USE_MONOTONIC
88static void (*method_modify)(int fd, int oev, int nev); 508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
89static 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
90 524
91/*****************************************************************************/ 525/*****************************************************************************/
92 526
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
93ev_tstamp 755ev_tstamp
94ev_time (void) 756ev_time (void)
95{ 757{
96#if EV_USE_REALTIME 758#if EV_USE_REALTIME
759 if (expect_true (have_realtime))
760 {
97 struct timespec ts; 761 struct timespec ts;
98 clock_gettime (CLOCK_REALTIME, &ts); 762 clock_gettime (CLOCK_REALTIME, &ts);
99 return ts.tv_sec + ts.tv_nsec * 1e-9; 763 return ts.tv_sec + ts.tv_nsec * 1e-9;
100#else 764 }
765#endif
766
101 struct timeval tv; 767 struct timeval tv;
102 gettimeofday (&tv, 0); 768 gettimeofday (&tv, 0);
103 return tv.tv_sec + tv.tv_usec * 1e-6; 769 return tv.tv_sec + tv.tv_usec * 1e-6;
104#endif
105} 770}
771#endif
106 772
107static ev_tstamp 773inline_size ev_tstamp
108get_clock (void) 774get_clock (void)
109{ 775{
110#if EV_USE_MONOTONIC 776#if EV_USE_MONOTONIC
111 if (have_monotonic) 777 if (expect_true (have_monotonic))
112 { 778 {
113 struct timespec ts; 779 struct timespec ts;
114 clock_gettime (CLOCK_MONOTONIC, &ts); 780 clock_gettime (CLOCK_MONOTONIC, &ts);
115 return ts.tv_sec + ts.tv_nsec * 1e-9; 781 return ts.tv_sec + ts.tv_nsec * 1e-9;
116 } 782 }
117#endif 783#endif
118 784
119 return ev_time (); 785 return ev_time ();
120} 786}
121 787
122#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
123 795
124#define array_needsize(base,cur,cnt,init) \ 796void
125 if ((cnt) > cur) \ 797ev_sleep (ev_tstamp delay)
126 { \ 798{
127 int newcnt = cur; \ 799 if (delay > 0.)
128 do \
129 { \
130 newcnt = array_roundsize (base, newcnt << 1); \
131 } \
132 while ((cnt) > newcnt); \
133 \
134 base = realloc (base, sizeof (*base) * (newcnt)); \
135 init (base + cur, newcnt - cur); \
136 cur = newcnt; \
137 } 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}
138 819
139/*****************************************************************************/ 820/*****************************************************************************/
140 821
141typedef struct 822#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
142{
143 struct ev_io *head;
144 unsigned char events;
145 unsigned char reify;
146} ANFD;
147 823
148static ANFD *anfds; 824/* find a suitable new size for the given array, */
149static int anfdmax; 825/* hopefully by rounding to a nice-to-malloc size */
150 826inline_size int
151static void 827array_nextsize (int elem, int cur, int cnt)
152anfds_init (ANFD *base, int count)
153{ 828{
154 while (count--) 829 int ncur = cur + 1;
155 {
156 base->head = 0;
157 base->events = EV_NONE;
158 base->reify = 0;
159 830
160 ++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)
161 } 837 {
162} 838 ncur *= elem;
163 839 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
164typedef struct 840 ncur = ncur - sizeof (void *) * 4;
165{ 841 ncur /= elem;
166 W w;
167 int events;
168} ANPENDING;
169
170static ANPENDING *pendings;
171static int pendingmax, pendingcnt;
172
173static void
174event (W w, int events)
175{
176 if (w->pending)
177 { 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_;
178 pendings [w->pending - 1].events |= events; 900 pendings [pri][w_->pending - 1].events = revents;
179 return;
180 } 901 }
181
182 w->pending = ++pendingcnt;
183 array_needsize (pendings, pendingmax, pendingcnt, );
184 pendings [pendingcnt - 1].w = w;
185 pendings [pendingcnt - 1].events = events;
186} 902}
187 903
188static 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
189queue_events (W *events, int eventcnt, int type) 920queue_events (EV_P_ W *events, int eventcnt, int type)
190{ 921{
191 int i; 922 int i;
192 923
193 for (i = 0; i < eventcnt; ++i) 924 for (i = 0; i < eventcnt; ++i)
194 event (events [i], type); 925 ev_feed_event (EV_A_ events [i], type);
195} 926}
196 927
197static void 928/*****************************************************************************/
929
930inline_speed void
198fd_event (int fd, int events) 931fd_event_nocheck (EV_P_ int fd, int revents)
199{ 932{
200 ANFD *anfd = anfds + fd; 933 ANFD *anfd = anfds + fd;
201 struct ev_io *w; 934 ev_io *w;
202 935
203 for (w = anfd->head; w; w = w->next) 936 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
204 { 937 {
205 int ev = w->events & events; 938 int ev = w->events & revents;
206 939
207 if (ev) 940 if (ev)
208 event ((W)w, ev); 941 ev_feed_event (EV_A_ (W)w, ev);
209 } 942 }
210} 943}
211 944
212/*****************************************************************************/ 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;
213 951
214static int *fdchanges; 952 if (expect_true (!anfd->reify))
215static int fdchangemax, fdchangecnt; 953 fd_event_nocheck (EV_A_ fd, revents);
954}
216 955
217static void 956void
218fd_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)
219{ 967{
220 int i; 968 int i;
221 969
222 for (i = 0; i < fdchangecnt; ++i) 970 for (i = 0; i < fdchangecnt; ++i)
223 { 971 {
224 int fd = fdchanges [i]; 972 int fd = fdchanges [i];
225 ANFD *anfd = anfds + fd; 973 ANFD *anfd = anfds + fd;
226 struct ev_io *w; 974 ev_io *w;
227 975
228 int events = 0; 976 unsigned char o_events = anfd->events;
977 unsigned char o_reify = anfd->reify;
229 978
230 for (w = anfd->head; w; w = w->next)
231 events |= w->events;
232
233 anfd->reify = 0; 979 anfd->reify = 0;
234 980
235 if (anfd->events != events) 981#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
982 if (o_reify & EV__IOFDSET)
236 { 983 {
237 method_modify (fd, anfd->events, events); 984 unsigned long arg;
238 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
239 } 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);
240 } 1004 }
241 1005
242 fdchangecnt = 0; 1006 fdchangecnt = 0;
243} 1007}
244 1008
245static void 1009/* something about the given fd changed */
246fd_change (int fd) 1010inline_size void
1011fd_change (EV_P_ int fd, int flags)
247{ 1012{
248 if (anfds [fd].reify || fdchangecnt < 0) 1013 unsigned char reify = anfds [fd].reify;
249 return;
250
251 anfds [fd].reify = 1; 1014 anfds [fd].reify |= flags;
252 1015
1016 if (expect_true (!reify))
1017 {
253 ++fdchangecnt; 1018 ++fdchangecnt;
254 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1019 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
255 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
256} 1046}
257 1047
258/* called on EBADF to verify fds */ 1048/* called on EBADF to verify fds */
259static void 1049static void noinline
260fd_recheck (void) 1050fd_ebadf (EV_P)
261{ 1051{
262 int fd; 1052 int fd;
263 1053
264 for (fd = 0; fd < anfdmax; ++fd) 1054 for (fd = 0; fd < anfdmax; ++fd)
265 if (anfds [fd].events) 1055 if (anfds [fd].events)
266 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1056 if (!fd_valid (fd) && errno == EBADF)
267 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)
268 { 1364 {
269 ev_io_stop (anfds [fd].head); 1365 asyncs [i]->sent = 0;
270 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); 1366 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
271 } 1367 }
1368 }
1369#endif
272} 1370}
273 1371
274/*****************************************************************************/ 1372/*****************************************************************************/
275 1373
276static struct ev_timer **timers; 1374void
277static int timermax, timercnt; 1375ev_feed_signal (int signum)
1376{
1377#if EV_MULTIPLICITY
1378 EV_P = signals [signum - 1].loop;
278 1379
279static struct ev_periodic **periodics; 1380 if (!EV_A)
280static int periodicmax, periodiccnt; 1381 return;
1382#endif
1383
1384 signals [signum - 1].pending = 1;
1385 evpipe_write (EV_A_ &sig_pending);
1386}
281 1387
282static void 1388static void
283upheap (WT *timers, int k) 1389ev_sighandler (int signum)
284{ 1390{
285 WT w = timers [k]; 1391#ifdef _WIN32
1392 signal (signum, ev_sighandler);
1393#endif
286 1394
287 while (k && timers [k >> 1]->at > w->at) 1395 ev_feed_signal (signum);
288 {
289 timers [k] = timers [k >> 1];
290 timers [k]->active = k + 1;
291 k >>= 1;
292 }
293
294 timers [k] = w;
295 timers [k]->active = k + 1;
296
297} 1396}
298 1397
1398void noinline
1399ev_feed_signal_event (EV_P_ int signum)
1400{
1401 WL w;
1402
1403 if (expect_false (signum <= 0 || signum > EV_NSIG))
1404 return;
1405
1406 --signum;
1407
1408#if EV_MULTIPLICITY
1409 /* it is permissible to try to feed a signal to the wrong loop */
1410 /* or, likely more useful, feeding a signal nobody is waiting for */
1411
1412 if (expect_false (signals [signum].loop != EV_A))
1413 return;
1414#endif
1415
1416 signals [signum].pending = 0;
1417
1418 for (w = signals [signum].head; w; w = w->next)
1419 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1420}
1421
1422#if EV_USE_SIGNALFD
299static void 1423static void
300downheap (WT *timers, int N, int k) 1424sigfdcb (EV_P_ ev_io *iow, int revents)
301{ 1425{
302 WT w = timers [k]; 1426 struct signalfd_siginfo si[2], *sip; /* these structs are big */
303 1427
304 while (k < (N >> 1)) 1428 for (;;)
305 { 1429 {
306 int j = k << 1; 1430 ssize_t res = read (sigfd, si, sizeof (si));
307 1431
308 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1432 /* not ISO-C, as res might be -1, but works with SuS */
309 ++j; 1433 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1434 ev_feed_signal_event (EV_A_ sip->ssi_signo);
310 1435
311 if (w->at <= timers [j]->at) 1436 if (res < (ssize_t)sizeof (si))
312 break; 1437 break;
313
314 timers [k] = timers [j];
315 timers [k]->active = k + 1;
316 k = j;
317 } 1438 }
318
319 timers [k] = w;
320 timers [k]->active = k + 1;
321} 1439}
1440#endif
1441
1442#endif
322 1443
323/*****************************************************************************/ 1444/*****************************************************************************/
324 1445
325typedef struct 1446#if EV_CHILD_ENABLE
326{ 1447static WL childs [EV_PID_HASHSIZE];
327 struct ev_signal *head;
328 sig_atomic_t volatile gotsig;
329} ANSIG;
330 1448
331static ANSIG *signals;
332static int signalmax;
333
334static int sigpipe [2];
335static sig_atomic_t volatile gotsig;
336static struct ev_io sigev;
337
338static void
339signals_init (ANSIG *base, int count)
340{
341 while (count--)
342 {
343 base->head = 0;
344 base->gotsig = 0;
345
346 ++base;
347 }
348}
349
350static void
351sighandler (int signum)
352{
353 signals [signum - 1].gotsig = 1;
354
355 if (!gotsig)
356 {
357 gotsig = 1;
358 write (sigpipe [1], &signum, 1);
359 }
360}
361
362static void
363sigcb (struct ev_io *iow, int revents)
364{
365 struct ev_signal *w;
366 int sig;
367
368 read (sigpipe [0], &revents, 1);
369 gotsig = 0;
370
371 for (sig = signalmax; sig--; )
372 if (signals [sig].gotsig)
373 {
374 signals [sig].gotsig = 0;
375
376 for (w = signals [sig].head; w; w = w->next)
377 event ((W)w, EV_SIGNAL);
378 }
379}
380
381static void
382siginit (void)
383{
384 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386
387 /* rather than sort out wether we really need nb, set it */
388 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
390
391 ev_io_set (&sigev, sigpipe [0], EV_READ);
392 ev_io_start (&sigev);
393}
394
395/*****************************************************************************/
396
397static struct ev_idle **idles;
398static int idlemax, idlecnt;
399
400static struct ev_prepare **prepares;
401static int preparemax, preparecnt;
402
403static struct ev_check **checks;
404static int checkmax, checkcnt;
405
406/*****************************************************************************/
407
408static struct ev_child *childs [PID_HASHSIZE];
409static struct ev_signal childev; 1449static ev_signal childev;
1450
1451#ifndef WIFCONTINUED
1452# define WIFCONTINUED(status) 0
1453#endif
1454
1455/* handle a single child status event */
1456inline_speed void
1457child_reap (EV_P_ int chain, int pid, int status)
1458{
1459 ev_child *w;
1460 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1461
1462 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1463 {
1464 if ((w->pid == pid || !w->pid)
1465 && (!traced || (w->flags & 1)))
1466 {
1467 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1468 w->rpid = pid;
1469 w->rstatus = status;
1470 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1471 }
1472 }
1473}
410 1474
411#ifndef WCONTINUED 1475#ifndef WCONTINUED
412# define WCONTINUED 0 1476# define WCONTINUED 0
413#endif 1477#endif
414 1478
1479/* called on sigchld etc., calls waitpid */
415static void 1480static void
416childcb (struct ev_signal *sw, int revents) 1481childcb (EV_P_ ev_signal *sw, int revents)
417{ 1482{
418 struct ev_child *w;
419 int pid, status; 1483 int pid, status;
420 1484
1485 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
421 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1486 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1487 if (!WCONTINUED
423 if (w->pid == pid || w->pid == -1) 1488 || errno != EINVAL
424 { 1489 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
425 w->status = status; 1490 return;
426 event ((W)w, EV_CHILD); 1491
427 } 1492 /* make sure we are called again until all children have been reaped */
1493 /* we need to do it this way so that the callback gets called before we continue */
1494 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1495
1496 child_reap (EV_A_ pid, pid, status);
1497 if ((EV_PID_HASHSIZE) > 1)
1498 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
428} 1499}
1500
1501#endif
429 1502
430/*****************************************************************************/ 1503/*****************************************************************************/
431 1504
1505#if EV_USE_IOCP
1506# include "ev_iocp.c"
1507#endif
1508#if EV_USE_PORT
1509# include "ev_port.c"
1510#endif
1511#if EV_USE_KQUEUE
1512# include "ev_kqueue.c"
1513#endif
432#if EV_USE_EPOLL 1514#if EV_USE_EPOLL
433# include "ev_epoll.c" 1515# include "ev_epoll.c"
434#endif 1516#endif
1517#if EV_USE_POLL
1518# include "ev_poll.c"
1519#endif
435#if EV_USE_SELECT 1520#if EV_USE_SELECT
436# include "ev_select.c" 1521# include "ev_select.c"
437#endif 1522#endif
438 1523
439int 1524int
… …
446ev_version_minor (void) 1531ev_version_minor (void)
447{ 1532{
448 return EV_VERSION_MINOR; 1533 return EV_VERSION_MINOR;
449} 1534}
450 1535
451int ev_init (int flags) 1536/* return true if we are running with elevated privileges and should ignore env variables */
1537int inline_size
1538enable_secure (void)
452{ 1539{
453 if (!ev_method) 1540#ifdef _WIN32
1541 return 0;
1542#else
1543 return getuid () != geteuid ()
1544 || getgid () != getegid ();
1545#endif
1546}
1547
1548unsigned int
1549ev_supported_backends (void)
1550{
1551 unsigned int flags = 0;
1552
1553 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1554 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1555 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1556 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1557 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1558
1559 return flags;
1560}
1561
1562unsigned int
1563ev_recommended_backends (void)
1564{
1565 unsigned int flags = ev_supported_backends ();
1566
1567#ifndef __NetBSD__
1568 /* kqueue is borked on everything but netbsd apparently */
1569 /* it usually doesn't work correctly on anything but sockets and pipes */
1570 flags &= ~EVBACKEND_KQUEUE;
1571#endif
1572#ifdef __APPLE__
1573 /* only select works correctly on that "unix-certified" platform */
1574 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1575 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1576#endif
1577#ifdef __FreeBSD__
1578 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1579#endif
1580
1581 return flags;
1582}
1583
1584unsigned int
1585ev_embeddable_backends (void)
1586{
1587 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1588
1589 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1590 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1591 flags &= ~EVBACKEND_EPOLL;
1592
1593 return flags;
1594}
1595
1596unsigned int
1597ev_backend (EV_P)
1598{
1599 return backend;
1600}
1601
1602#if EV_FEATURE_API
1603unsigned int
1604ev_iteration (EV_P)
1605{
1606 return loop_count;
1607}
1608
1609unsigned int
1610ev_depth (EV_P)
1611{
1612 return loop_depth;
1613}
1614
1615void
1616ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1617{
1618 io_blocktime = interval;
1619}
1620
1621void
1622ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1623{
1624 timeout_blocktime = interval;
1625}
1626
1627void
1628ev_set_userdata (EV_P_ void *data)
1629{
1630 userdata = data;
1631}
1632
1633void *
1634ev_userdata (EV_P)
1635{
1636 return userdata;
1637}
1638
1639void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1640{
1641 invoke_cb = invoke_pending_cb;
1642}
1643
1644void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1645{
1646 release_cb = release;
1647 acquire_cb = acquire;
1648}
1649#endif
1650
1651/* initialise a loop structure, must be zero-initialised */
1652static void noinline
1653loop_init (EV_P_ unsigned int flags)
1654{
1655 if (!backend)
454 { 1656 {
1657 origflags = flags;
1658
1659#if EV_USE_REALTIME
1660 if (!have_realtime)
1661 {
1662 struct timespec ts;
1663
1664 if (!clock_gettime (CLOCK_REALTIME, &ts))
1665 have_realtime = 1;
1666 }
1667#endif
1668
455#if EV_USE_MONOTONIC 1669#if EV_USE_MONOTONIC
1670 if (!have_monotonic)
1671 {
1672 struct timespec ts;
1673
1674 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1675 have_monotonic = 1;
1676 }
1677#endif
1678
1679 /* pid check not overridable via env */
1680#ifndef _WIN32
1681 if (flags & EVFLAG_FORKCHECK)
1682 curpid = getpid ();
1683#endif
1684
1685 if (!(flags & EVFLAG_NOENV)
1686 && !enable_secure ()
1687 && getenv ("LIBEV_FLAGS"))
1688 flags = atoi (getenv ("LIBEV_FLAGS"));
1689
1690 ev_rt_now = ev_time ();
1691 mn_now = get_clock ();
1692 now_floor = mn_now;
1693 rtmn_diff = ev_rt_now - mn_now;
1694#if EV_FEATURE_API
1695 invoke_cb = ev_invoke_pending;
1696#endif
1697
1698 io_blocktime = 0.;
1699 timeout_blocktime = 0.;
1700 backend = 0;
1701 backend_fd = -1;
1702 sig_pending = 0;
1703#if EV_ASYNC_ENABLE
1704 async_pending = 0;
1705#endif
1706#if EV_USE_INOTIFY
1707 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1708#endif
1709#if EV_USE_SIGNALFD
1710 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1711#endif
1712
1713 if (!(flags & EVBACKEND_MASK))
1714 flags |= ev_recommended_backends ();
1715
1716#if EV_USE_IOCP
1717 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1718#endif
1719#if EV_USE_PORT
1720 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1721#endif
1722#if EV_USE_KQUEUE
1723 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1724#endif
1725#if EV_USE_EPOLL
1726 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1727#endif
1728#if EV_USE_POLL
1729 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1730#endif
1731#if EV_USE_SELECT
1732 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1733#endif
1734
1735 ev_prepare_init (&pending_w, pendingcb);
1736
1737#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1738 ev_init (&pipe_w, pipecb);
1739 ev_set_priority (&pipe_w, EV_MAXPRI);
1740#endif
1741 }
1742}
1743
1744/* free up a loop structure */
1745void
1746ev_loop_destroy (EV_P)
1747{
1748 int i;
1749
1750#if EV_MULTIPLICITY
1751 /* mimic free (0) */
1752 if (!EV_A)
1753 return;
1754#endif
1755
1756#if EV_CLEANUP_ENABLE
1757 /* queue cleanup watchers (and execute them) */
1758 if (expect_false (cleanupcnt))
1759 {
1760 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1761 EV_INVOKE_PENDING;
1762 }
1763#endif
1764
1765#if EV_CHILD_ENABLE
1766 if (ev_is_active (&childev))
1767 {
1768 ev_ref (EV_A); /* child watcher */
1769 ev_signal_stop (EV_A_ &childev);
1770 }
1771#endif
1772
1773 if (ev_is_active (&pipe_w))
1774 {
1775 /*ev_ref (EV_A);*/
1776 /*ev_io_stop (EV_A_ &pipe_w);*/
1777
1778#if EV_USE_EVENTFD
1779 if (evfd >= 0)
1780 close (evfd);
1781#endif
1782
1783 if (evpipe [0] >= 0)
1784 {
1785 EV_WIN32_CLOSE_FD (evpipe [0]);
1786 EV_WIN32_CLOSE_FD (evpipe [1]);
1787 }
1788 }
1789
1790#if EV_USE_SIGNALFD
1791 if (ev_is_active (&sigfd_w))
1792 close (sigfd);
1793#endif
1794
1795#if EV_USE_INOTIFY
1796 if (fs_fd >= 0)
1797 close (fs_fd);
1798#endif
1799
1800 if (backend_fd >= 0)
1801 close (backend_fd);
1802
1803#if EV_USE_IOCP
1804 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1805#endif
1806#if EV_USE_PORT
1807 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1808#endif
1809#if EV_USE_KQUEUE
1810 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1811#endif
1812#if EV_USE_EPOLL
1813 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1814#endif
1815#if EV_USE_POLL
1816 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1817#endif
1818#if EV_USE_SELECT
1819 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1820#endif
1821
1822 for (i = NUMPRI; i--; )
1823 {
1824 array_free (pending, [i]);
1825#if EV_IDLE_ENABLE
1826 array_free (idle, [i]);
1827#endif
1828 }
1829
1830 ev_free (anfds); anfds = 0; anfdmax = 0;
1831
1832 /* have to use the microsoft-never-gets-it-right macro */
1833 array_free (rfeed, EMPTY);
1834 array_free (fdchange, EMPTY);
1835 array_free (timer, EMPTY);
1836#if EV_PERIODIC_ENABLE
1837 array_free (periodic, EMPTY);
1838#endif
1839#if EV_FORK_ENABLE
1840 array_free (fork, EMPTY);
1841#endif
1842#if EV_CLEANUP_ENABLE
1843 array_free (cleanup, EMPTY);
1844#endif
1845 array_free (prepare, EMPTY);
1846 array_free (check, EMPTY);
1847#if EV_ASYNC_ENABLE
1848 array_free (async, EMPTY);
1849#endif
1850
1851 backend = 0;
1852
1853#if EV_MULTIPLICITY
1854 if (ev_is_default_loop (EV_A))
1855#endif
1856 ev_default_loop_ptr = 0;
1857#if EV_MULTIPLICITY
1858 else
1859 ev_free (EV_A);
1860#endif
1861}
1862
1863#if EV_USE_INOTIFY
1864inline_size void infy_fork (EV_P);
1865#endif
1866
1867inline_size void
1868loop_fork (EV_P)
1869{
1870#if EV_USE_PORT
1871 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1872#endif
1873#if EV_USE_KQUEUE
1874 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1875#endif
1876#if EV_USE_EPOLL
1877 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1878#endif
1879#if EV_USE_INOTIFY
1880 infy_fork (EV_A);
1881#endif
1882
1883 if (ev_is_active (&pipe_w))
1884 {
1885 /* this "locks" the handlers against writing to the pipe */
1886 /* while we modify the fd vars */
1887 sig_pending = 1;
1888#if EV_ASYNC_ENABLE
1889 async_pending = 1;
1890#endif
1891
1892 ev_ref (EV_A);
1893 ev_io_stop (EV_A_ &pipe_w);
1894
1895#if EV_USE_EVENTFD
1896 if (evfd >= 0)
1897 close (evfd);
1898#endif
1899
1900 if (evpipe [0] >= 0)
1901 {
1902 EV_WIN32_CLOSE_FD (evpipe [0]);
1903 EV_WIN32_CLOSE_FD (evpipe [1]);
1904 }
1905
1906#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1907 evpipe_init (EV_A);
1908 /* now iterate over everything, in case we missed something */
1909 pipecb (EV_A_ &pipe_w, EV_READ);
1910#endif
1911 }
1912
1913 postfork = 0;
1914}
1915
1916#if EV_MULTIPLICITY
1917
1918struct ev_loop *
1919ev_loop_new (unsigned int flags)
1920{
1921 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1922
1923 memset (EV_A, 0, sizeof (struct ev_loop));
1924 loop_init (EV_A_ flags);
1925
1926 if (ev_backend (EV_A))
1927 return EV_A;
1928
1929 ev_free (EV_A);
1930 return 0;
1931}
1932
1933#endif /* multiplicity */
1934
1935#if EV_VERIFY
1936static void noinline
1937verify_watcher (EV_P_ W w)
1938{
1939 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1940
1941 if (w->pending)
1942 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1943}
1944
1945static void noinline
1946verify_heap (EV_P_ ANHE *heap, int N)
1947{
1948 int i;
1949
1950 for (i = HEAP0; i < N + HEAP0; ++i)
1951 {
1952 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1953 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1954 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1955
1956 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1957 }
1958}
1959
1960static void noinline
1961array_verify (EV_P_ W *ws, int cnt)
1962{
1963 while (cnt--)
1964 {
1965 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1966 verify_watcher (EV_A_ ws [cnt]);
1967 }
1968}
1969#endif
1970
1971#if EV_FEATURE_API
1972void
1973ev_verify (EV_P)
1974{
1975#if EV_VERIFY
1976 int i;
1977 WL w;
1978
1979 assert (activecnt >= -1);
1980
1981 assert (fdchangemax >= fdchangecnt);
1982 for (i = 0; i < fdchangecnt; ++i)
1983 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1984
1985 assert (anfdmax >= 0);
1986 for (i = 0; i < anfdmax; ++i)
1987 for (w = anfds [i].head; w; w = w->next)
456 { 1988 {
457 struct timespec ts; 1989 verify_watcher (EV_A_ (W)w);
458 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1990 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
459 have_monotonic = 1; 1991 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
460 } 1992 }
1993
1994 assert (timermax >= timercnt);
1995 verify_heap (EV_A_ timers, timercnt);
1996
1997#if EV_PERIODIC_ENABLE
1998 assert (periodicmax >= periodiccnt);
1999 verify_heap (EV_A_ periodics, periodiccnt);
2000#endif
2001
2002 for (i = NUMPRI; i--; )
2003 {
2004 assert (pendingmax [i] >= pendingcnt [i]);
2005#if EV_IDLE_ENABLE
2006 assert (idleall >= 0);
2007 assert (idlemax [i] >= idlecnt [i]);
2008 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2009#endif
2010 }
2011
2012#if EV_FORK_ENABLE
2013 assert (forkmax >= forkcnt);
2014 array_verify (EV_A_ (W *)forks, forkcnt);
2015#endif
2016
2017#if EV_CLEANUP_ENABLE
2018 assert (cleanupmax >= cleanupcnt);
2019 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2020#endif
2021
2022#if EV_ASYNC_ENABLE
2023 assert (asyncmax >= asynccnt);
2024 array_verify (EV_A_ (W *)asyncs, asynccnt);
2025#endif
2026
2027#if EV_PREPARE_ENABLE
2028 assert (preparemax >= preparecnt);
2029 array_verify (EV_A_ (W *)prepares, preparecnt);
2030#endif
2031
2032#if EV_CHECK_ENABLE
2033 assert (checkmax >= checkcnt);
2034 array_verify (EV_A_ (W *)checks, checkcnt);
2035#endif
2036
2037# if 0
2038#if EV_CHILD_ENABLE
2039 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2040 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2041#endif
461#endif 2042# endif
462
463 ev_now = ev_time ();
464 now = get_clock ();
465 diff = ev_now - now;
466
467 if (pipe (sigpipe))
468 return 0;
469
470 ev_method = EVMETHOD_NONE;
471#if EV_USE_EPOLL
472 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
473#endif 2043#endif
474#if EV_USE_SELECT 2044}
475 if (ev_method == EVMETHOD_NONE) select_init (flags);
476#endif 2045#endif
477 2046
478 if (ev_method) 2047#if EV_MULTIPLICITY
2048struct ev_loop *
2049#else
2050int
2051#endif
2052ev_default_loop (unsigned int flags)
2053{
2054 if (!ev_default_loop_ptr)
2055 {
2056#if EV_MULTIPLICITY
2057 EV_P = ev_default_loop_ptr = &default_loop_struct;
2058#else
2059 ev_default_loop_ptr = 1;
2060#endif
2061
2062 loop_init (EV_A_ flags);
2063
2064 if (ev_backend (EV_A))
479 { 2065 {
480 ev_watcher_init (&sigev, sigcb); 2066#if EV_CHILD_ENABLE
481 siginit ();
482
483 ev_signal_init (&childev, childcb, SIGCHLD); 2067 ev_signal_init (&childev, childcb, SIGCHLD);
2068 ev_set_priority (&childev, EV_MAXPRI);
484 ev_signal_start (&childev); 2069 ev_signal_start (EV_A_ &childev);
2070 ev_unref (EV_A); /* child watcher should not keep loop alive */
2071#endif
485 } 2072 }
2073 else
2074 ev_default_loop_ptr = 0;
486 } 2075 }
487 2076
488 return ev_method; 2077 return ev_default_loop_ptr;
2078}
2079
2080void
2081ev_loop_fork (EV_P)
2082{
2083 postfork = 1; /* must be in line with ev_default_fork */
489} 2084}
490 2085
491/*****************************************************************************/ 2086/*****************************************************************************/
492 2087
493void 2088void
494ev_fork_prepare (void) 2089ev_invoke (EV_P_ void *w, int revents)
495{ 2090{
496 /* nop */ 2091 EV_CB_INVOKE ((W)w, revents);
497} 2092}
498 2093
499void 2094unsigned int
500ev_fork_parent (void) 2095ev_pending_count (EV_P)
501{ 2096{
502 /* nop */ 2097 int pri;
503} 2098 unsigned int count = 0;
504 2099
505void 2100 for (pri = NUMPRI; pri--; )
506ev_fork_child (void) 2101 count += pendingcnt [pri];
2102
2103 return count;
2104}
2105
2106void noinline
2107ev_invoke_pending (EV_P)
507{ 2108{
508#if EV_USE_EPOLL 2109 int pri;
509 if (ev_method == EVMETHOD_EPOLL) 2110
510 epoll_postfork_child (); 2111 for (pri = NUMPRI; pri--; )
2112 while (pendingcnt [pri])
2113 {
2114 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2115
2116 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2117 /* ^ this is no longer true, as pending_w could be here */
2118
2119 p->w->pending = 0;
2120 EV_CB_INVOKE (p->w, p->events);
2121 EV_FREQUENT_CHECK;
2122 }
2123}
2124
2125#if EV_IDLE_ENABLE
2126/* make idle watchers pending. this handles the "call-idle */
2127/* only when higher priorities are idle" logic */
2128inline_size void
2129idle_reify (EV_P)
2130{
2131 if (expect_false (idleall))
2132 {
2133 int pri;
2134
2135 for (pri = NUMPRI; pri--; )
2136 {
2137 if (pendingcnt [pri])
2138 break;
2139
2140 if (idlecnt [pri])
2141 {
2142 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2143 break;
2144 }
2145 }
2146 }
2147}
2148#endif
2149
2150/* make timers pending */
2151inline_size void
2152timers_reify (EV_P)
2153{
2154 EV_FREQUENT_CHECK;
2155
2156 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2157 {
2158 do
2159 {
2160 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2161
2162 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2163
2164 /* first reschedule or stop timer */
2165 if (w->repeat)
2166 {
2167 ev_at (w) += w->repeat;
2168 if (ev_at (w) < mn_now)
2169 ev_at (w) = mn_now;
2170
2171 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2172
2173 ANHE_at_cache (timers [HEAP0]);
2174 downheap (timers, timercnt, HEAP0);
2175 }
2176 else
2177 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2178
2179 EV_FREQUENT_CHECK;
2180 feed_reverse (EV_A_ (W)w);
2181 }
2182 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2183
2184 feed_reverse_done (EV_A_ EV_TIMER);
2185 }
2186}
2187
2188#if EV_PERIODIC_ENABLE
2189/* make periodics pending */
2190inline_size void
2191periodics_reify (EV_P)
2192{
2193 EV_FREQUENT_CHECK;
2194
2195 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2196 {
2197 int feed_count = 0;
2198
2199 do
2200 {
2201 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2202
2203 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2204
2205 /* first reschedule or stop timer */
2206 if (w->reschedule_cb)
2207 {
2208 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2209
2210 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2211
2212 ANHE_at_cache (periodics [HEAP0]);
2213 downheap (periodics, periodiccnt, HEAP0);
2214 }
2215 else if (w->interval)
2216 {
2217 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2218 /* if next trigger time is not sufficiently in the future, put it there */
2219 /* this might happen because of floating point inexactness */
2220 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2221 {
2222 ev_at (w) += w->interval;
2223
2224 /* if interval is unreasonably low we might still have a time in the past */
2225 /* so correct this. this will make the periodic very inexact, but the user */
2226 /* has effectively asked to get triggered more often than possible */
2227 if (ev_at (w) < ev_rt_now)
2228 ev_at (w) = ev_rt_now;
2229 }
2230
2231 ANHE_at_cache (periodics [HEAP0]);
2232 downheap (periodics, periodiccnt, HEAP0);
2233 }
2234 else
2235 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2236
2237 EV_FREQUENT_CHECK;
2238 feed_reverse (EV_A_ (W)w);
2239 }
2240 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2241
2242 feed_reverse_done (EV_A_ EV_PERIODIC);
2243 }
2244}
2245
2246/* simply recalculate all periodics */
2247/* TODO: maybe ensure that at least one event happens when jumping forward? */
2248static void noinline
2249periodics_reschedule (EV_P)
2250{
2251 int i;
2252
2253 /* adjust periodics after time jump */
2254 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2255 {
2256 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2257
2258 if (w->reschedule_cb)
2259 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2260 else if (w->interval)
2261 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2262
2263 ANHE_at_cache (periodics [i]);
2264 }
2265
2266 reheap (periodics, periodiccnt);
2267}
2268#endif
2269
2270/* adjust all timers by a given offset */
2271static void noinline
2272timers_reschedule (EV_P_ ev_tstamp adjust)
2273{
2274 int i;
2275
2276 for (i = 0; i < timercnt; ++i)
2277 {
2278 ANHE *he = timers + i + HEAP0;
2279 ANHE_w (*he)->at += adjust;
2280 ANHE_at_cache (*he);
2281 }
2282}
2283
2284/* fetch new monotonic and realtime times from the kernel */
2285/* also detect if there was a timejump, and act accordingly */
2286inline_speed void
2287time_update (EV_P_ ev_tstamp max_block)
2288{
2289#if EV_USE_MONOTONIC
2290 if (expect_true (have_monotonic))
2291 {
2292 int i;
2293 ev_tstamp odiff = rtmn_diff;
2294
2295 mn_now = get_clock ();
2296
2297 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2298 /* interpolate in the meantime */
2299 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2300 {
2301 ev_rt_now = rtmn_diff + mn_now;
2302 return;
2303 }
2304
2305 now_floor = mn_now;
2306 ev_rt_now = ev_time ();
2307
2308 /* loop a few times, before making important decisions.
2309 * on the choice of "4": one iteration isn't enough,
2310 * in case we get preempted during the calls to
2311 * ev_time and get_clock. a second call is almost guaranteed
2312 * to succeed in that case, though. and looping a few more times
2313 * doesn't hurt either as we only do this on time-jumps or
2314 * in the unlikely event of having been preempted here.
2315 */
2316 for (i = 4; --i; )
2317 {
2318 rtmn_diff = ev_rt_now - mn_now;
2319
2320 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2321 return; /* all is well */
2322
2323 ev_rt_now = ev_time ();
2324 mn_now = get_clock ();
2325 now_floor = mn_now;
2326 }
2327
2328 /* no timer adjustment, as the monotonic clock doesn't jump */
2329 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2330# if EV_PERIODIC_ENABLE
2331 periodics_reschedule (EV_A);
511#endif 2332# endif
2333 }
2334 else
2335#endif
2336 {
2337 ev_rt_now = ev_time ();
512 2338
513 ev_io_stop (&sigev); 2339 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
514 close (sigpipe [0]); 2340 {
515 close (sigpipe [1]); 2341 /* adjust timers. this is easy, as the offset is the same for all of them */
516 pipe (sigpipe); 2342 timers_reschedule (EV_A_ ev_rt_now - mn_now);
517 siginit (); 2343#if EV_PERIODIC_ENABLE
2344 periodics_reschedule (EV_A);
2345#endif
2346 }
2347
2348 mn_now = ev_rt_now;
2349 }
2350}
2351
2352void
2353ev_run (EV_P_ int flags)
2354{
2355#if EV_FEATURE_API
2356 ++loop_depth;
2357#endif
2358
2359 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2360
2361 loop_done = EVBREAK_CANCEL;
2362
2363 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2364
2365 do
2366 {
2367#if EV_VERIFY >= 2
2368 ev_verify (EV_A);
2369#endif
2370
2371#ifndef _WIN32
2372 if (expect_false (curpid)) /* penalise the forking check even more */
2373 if (expect_false (getpid () != curpid))
2374 {
2375 curpid = getpid ();
2376 postfork = 1;
2377 }
2378#endif
2379
2380#if EV_FORK_ENABLE
2381 /* we might have forked, so queue fork handlers */
2382 if (expect_false (postfork))
2383 if (forkcnt)
2384 {
2385 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2386 EV_INVOKE_PENDING;
2387 }
2388#endif
2389
2390#if EV_PREPARE_ENABLE
2391 /* queue prepare watchers (and execute them) */
2392 if (expect_false (preparecnt))
2393 {
2394 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2395 EV_INVOKE_PENDING;
2396 }
2397#endif
2398
2399 if (expect_false (loop_done))
2400 break;
2401
2402 /* we might have forked, so reify kernel state if necessary */
2403 if (expect_false (postfork))
2404 loop_fork (EV_A);
2405
2406 /* update fd-related kernel structures */
2407 fd_reify (EV_A);
2408
2409 /* calculate blocking time */
2410 {
2411 ev_tstamp waittime = 0.;
2412 ev_tstamp sleeptime = 0.;
2413
2414 /* remember old timestamp for io_blocktime calculation */
2415 ev_tstamp prev_mn_now = mn_now;
2416
2417 /* update time to cancel out callback processing overhead */
2418 time_update (EV_A_ 1e100);
2419
2420 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
2421 {
2422 waittime = MAX_BLOCKTIME;
2423
2424 if (timercnt)
2425 {
2426 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2427 if (waittime > to) waittime = to;
2428 }
2429
2430#if EV_PERIODIC_ENABLE
2431 if (periodiccnt)
2432 {
2433 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2434 if (waittime > to) waittime = to;
2435 }
2436#endif
2437
2438 /* don't let timeouts decrease the waittime below timeout_blocktime */
2439 if (expect_false (waittime < timeout_blocktime))
2440 waittime = timeout_blocktime;
2441
2442 /* extra check because io_blocktime is commonly 0 */
2443 if (expect_false (io_blocktime))
2444 {
2445 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2446
2447 if (sleeptime > waittime - backend_fudge)
2448 sleeptime = waittime - backend_fudge;
2449
2450 if (expect_true (sleeptime > 0.))
2451 {
2452 ev_sleep (sleeptime);
2453 waittime -= sleeptime;
2454 }
2455 }
2456 }
2457
2458#if EV_FEATURE_API
2459 ++loop_count;
2460#endif
2461 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2462 backend_poll (EV_A_ waittime);
2463 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2464
2465 /* update ev_rt_now, do magic */
2466 time_update (EV_A_ waittime + sleeptime);
2467 }
2468
2469 /* queue pending timers and reschedule them */
2470 timers_reify (EV_A); /* relative timers called last */
2471#if EV_PERIODIC_ENABLE
2472 periodics_reify (EV_A); /* absolute timers called first */
2473#endif
2474
2475#if EV_IDLE_ENABLE
2476 /* queue idle watchers unless other events are pending */
2477 idle_reify (EV_A);
2478#endif
2479
2480#if EV_CHECK_ENABLE
2481 /* queue check watchers, to be executed first */
2482 if (expect_false (checkcnt))
2483 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2484#endif
2485
2486 EV_INVOKE_PENDING;
2487 }
2488 while (expect_true (
2489 activecnt
2490 && !loop_done
2491 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2492 ));
2493
2494 if (loop_done == EVBREAK_ONE)
2495 loop_done = EVBREAK_CANCEL;
2496
2497#if EV_FEATURE_API
2498 --loop_depth;
2499#endif
2500}
2501
2502void
2503ev_break (EV_P_ int how)
2504{
2505 loop_done = how;
2506}
2507
2508void
2509ev_ref (EV_P)
2510{
2511 ++activecnt;
2512}
2513
2514void
2515ev_unref (EV_P)
2516{
2517 --activecnt;
2518}
2519
2520void
2521ev_now_update (EV_P)
2522{
2523 time_update (EV_A_ 1e100);
2524}
2525
2526void
2527ev_suspend (EV_P)
2528{
2529 ev_now_update (EV_A);
2530}
2531
2532void
2533ev_resume (EV_P)
2534{
2535 ev_tstamp mn_prev = mn_now;
2536
2537 ev_now_update (EV_A);
2538 timers_reschedule (EV_A_ mn_now - mn_prev);
2539#if EV_PERIODIC_ENABLE
2540 /* TODO: really do this? */
2541 periodics_reschedule (EV_A);
2542#endif
518} 2543}
519 2544
520/*****************************************************************************/ 2545/*****************************************************************************/
2546/* singly-linked list management, used when the expected list length is short */
521 2547
522static void 2548inline_size void
523call_pending (void) 2549wlist_add (WL *head, WL elem)
524{ 2550{
525 while (pendingcnt) 2551 elem->next = *head;
526 { 2552 *head = elem;
527 ANPENDING *p = pendings + --pendingcnt; 2553}
528 2554
529 if (p->w) 2555inline_size void
2556wlist_del (WL *head, WL elem)
2557{
2558 while (*head)
2559 {
2560 if (expect_true (*head == elem))
530 { 2561 {
531 p->w->pending = 0; 2562 *head = elem->next;
532 p->w->cb (p->w, p->events); 2563 break;
533 } 2564 }
2565
2566 head = &(*head)->next;
2567 }
2568}
2569
2570/* internal, faster, version of ev_clear_pending */
2571inline_speed void
2572clear_pending (EV_P_ W w)
2573{
2574 if (w->pending)
534 } 2575 {
2576 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2577 w->pending = 0;
2578 }
535} 2579}
536 2580
537static void 2581int
538timers_reify (void) 2582ev_clear_pending (EV_P_ void *w)
539{ 2583{
540 while (timercnt && timers [0]->at <= now) 2584 W w_ = (W)w;
2585 int pending = w_->pending;
2586
2587 if (expect_true (pending))
2588 {
2589 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2590 p->w = (W)&pending_w;
2591 w_->pending = 0;
2592 return p->events;
2593 }
2594 else
2595 return 0;
2596}
2597
2598inline_size void
2599pri_adjust (EV_P_ W w)
2600{
2601 int pri = ev_priority (w);
2602 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2603 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2604 ev_set_priority (w, pri);
2605}
2606
2607inline_speed void
2608ev_start (EV_P_ W w, int active)
2609{
2610 pri_adjust (EV_A_ w);
2611 w->active = active;
2612 ev_ref (EV_A);
2613}
2614
2615inline_size void
2616ev_stop (EV_P_ W w)
2617{
2618 ev_unref (EV_A);
2619 w->active = 0;
2620}
2621
2622/*****************************************************************************/
2623
2624void noinline
2625ev_io_start (EV_P_ ev_io *w)
2626{
2627 int fd = w->fd;
2628
2629 if (expect_false (ev_is_active (w)))
2630 return;
2631
2632 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2633 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2634
2635 EV_FREQUENT_CHECK;
2636
2637 ev_start (EV_A_ (W)w, 1);
2638 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2639 wlist_add (&anfds[fd].head, (WL)w);
2640
2641 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2642 w->events &= ~EV__IOFDSET;
2643
2644 EV_FREQUENT_CHECK;
2645}
2646
2647void noinline
2648ev_io_stop (EV_P_ ev_io *w)
2649{
2650 clear_pending (EV_A_ (W)w);
2651 if (expect_false (!ev_is_active (w)))
2652 return;
2653
2654 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2655
2656 EV_FREQUENT_CHECK;
2657
2658 wlist_del (&anfds[w->fd].head, (WL)w);
2659 ev_stop (EV_A_ (W)w);
2660
2661 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2662
2663 EV_FREQUENT_CHECK;
2664}
2665
2666void noinline
2667ev_timer_start (EV_P_ ev_timer *w)
2668{
2669 if (expect_false (ev_is_active (w)))
2670 return;
2671
2672 ev_at (w) += mn_now;
2673
2674 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2675
2676 EV_FREQUENT_CHECK;
2677
2678 ++timercnt;
2679 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2680 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2681 ANHE_w (timers [ev_active (w)]) = (WT)w;
2682 ANHE_at_cache (timers [ev_active (w)]);
2683 upheap (timers, ev_active (w));
2684
2685 EV_FREQUENT_CHECK;
2686
2687 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2688}
2689
2690void noinline
2691ev_timer_stop (EV_P_ ev_timer *w)
2692{
2693 clear_pending (EV_A_ (W)w);
2694 if (expect_false (!ev_is_active (w)))
2695 return;
2696
2697 EV_FREQUENT_CHECK;
2698
2699 {
2700 int active = ev_active (w);
2701
2702 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2703
2704 --timercnt;
2705
2706 if (expect_true (active < timercnt + HEAP0))
541 { 2707 {
542 struct ev_timer *w = timers [0]; 2708 timers [active] = timers [timercnt + HEAP0];
2709 adjustheap (timers, timercnt, active);
2710 }
2711 }
543 2712
544 /* first reschedule or stop timer */ 2713 ev_at (w) -= mn_now;
2714
2715 ev_stop (EV_A_ (W)w);
2716
2717 EV_FREQUENT_CHECK;
2718}
2719
2720void noinline
2721ev_timer_again (EV_P_ ev_timer *w)
2722{
2723 EV_FREQUENT_CHECK;
2724
2725 if (ev_is_active (w))
2726 {
545 if (w->repeat) 2727 if (w->repeat)
546 { 2728 {
547 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548 w->at = now + w->repeat; 2729 ev_at (w) = mn_now + w->repeat;
549 downheap ((WT *)timers, timercnt, 0); 2730 ANHE_at_cache (timers [ev_active (w)]);
2731 adjustheap (timers, timercnt, ev_active (w));
550 } 2732 }
551 else 2733 else
552 ev_timer_stop (w); /* nonrepeating: stop timer */ 2734 ev_timer_stop (EV_A_ w);
553
554 event ((W)w, EV_TIMEOUT);
555 }
556}
557
558static void
559periodics_reify (void)
560{
561 while (periodiccnt && periodics [0]->at <= ev_now)
562 { 2735 }
563 struct ev_periodic *w = periodics [0]; 2736 else if (w->repeat)
2737 {
2738 ev_at (w) = w->repeat;
2739 ev_timer_start (EV_A_ w);
2740 }
564 2741
565 /* first reschedule or stop timer */ 2742 EV_FREQUENT_CHECK;
2743}
2744
2745ev_tstamp
2746ev_timer_remaining (EV_P_ ev_timer *w)
2747{
2748 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2749}
2750
2751#if EV_PERIODIC_ENABLE
2752void noinline
2753ev_periodic_start (EV_P_ ev_periodic *w)
2754{
2755 if (expect_false (ev_is_active (w)))
2756 return;
2757
2758 if (w->reschedule_cb)
2759 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
566 if (w->interval) 2760 else if (w->interval)
2761 {
2762 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2763 /* this formula differs from the one in periodic_reify because we do not always round up */
2764 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2765 }
2766 else
2767 ev_at (w) = w->offset;
2768
2769 EV_FREQUENT_CHECK;
2770
2771 ++periodiccnt;
2772 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2773 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2774 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2775 ANHE_at_cache (periodics [ev_active (w)]);
2776 upheap (periodics, ev_active (w));
2777
2778 EV_FREQUENT_CHECK;
2779
2780 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2781}
2782
2783void noinline
2784ev_periodic_stop (EV_P_ ev_periodic *w)
2785{
2786 clear_pending (EV_A_ (W)w);
2787 if (expect_false (!ev_is_active (w)))
2788 return;
2789
2790 EV_FREQUENT_CHECK;
2791
2792 {
2793 int active = ev_active (w);
2794
2795 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2796
2797 --periodiccnt;
2798
2799 if (expect_true (active < periodiccnt + HEAP0))
2800 {
2801 periodics [active] = periodics [periodiccnt + HEAP0];
2802 adjustheap (periodics, periodiccnt, active);
2803 }
2804 }
2805
2806 ev_stop (EV_A_ (W)w);
2807
2808 EV_FREQUENT_CHECK;
2809}
2810
2811void noinline
2812ev_periodic_again (EV_P_ ev_periodic *w)
2813{
2814 /* TODO: use adjustheap and recalculation */
2815 ev_periodic_stop (EV_A_ w);
2816 ev_periodic_start (EV_A_ w);
2817}
2818#endif
2819
2820#ifndef SA_RESTART
2821# define SA_RESTART 0
2822#endif
2823
2824#if EV_SIGNAL_ENABLE
2825
2826void noinline
2827ev_signal_start (EV_P_ ev_signal *w)
2828{
2829 if (expect_false (ev_is_active (w)))
2830 return;
2831
2832 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2833
2834#if EV_MULTIPLICITY
2835 assert (("libev: a signal must not be attached to two different loops",
2836 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2837
2838 signals [w->signum - 1].loop = EV_A;
2839#endif
2840
2841 EV_FREQUENT_CHECK;
2842
2843#if EV_USE_SIGNALFD
2844 if (sigfd == -2)
2845 {
2846 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2847 if (sigfd < 0 && errno == EINVAL)
2848 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2849
2850 if (sigfd >= 0)
567 { 2851 {
568 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2852 fd_intern (sigfd); /* doing it twice will not hurt */
569 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 2853
570 downheap ((WT *)periodics, periodiccnt, 0); 2854 sigemptyset (&sigfd_set);
2855
2856 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2857 ev_set_priority (&sigfd_w, EV_MAXPRI);
2858 ev_io_start (EV_A_ &sigfd_w);
2859 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2860 }
2861 }
2862
2863 if (sigfd >= 0)
2864 {
2865 /* TODO: check .head */
2866 sigaddset (&sigfd_set, w->signum);
2867 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2868
2869 signalfd (sigfd, &sigfd_set, 0);
2870 }
2871#endif
2872
2873 ev_start (EV_A_ (W)w, 1);
2874 wlist_add (&signals [w->signum - 1].head, (WL)w);
2875
2876 if (!((WL)w)->next)
2877# if EV_USE_SIGNALFD
2878 if (sigfd < 0) /*TODO*/
2879# endif
2880 {
2881# ifdef _WIN32
2882 evpipe_init (EV_A);
2883
2884 signal (w->signum, ev_sighandler);
2885# else
2886 struct sigaction sa;
2887
2888 evpipe_init (EV_A);
2889
2890 sa.sa_handler = ev_sighandler;
2891 sigfillset (&sa.sa_mask);
2892 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2893 sigaction (w->signum, &sa, 0);
2894
2895 if (origflags & EVFLAG_NOSIGMASK)
2896 {
2897 sigemptyset (&sa.sa_mask);
2898 sigaddset (&sa.sa_mask, w->signum);
2899 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2900 }
2901#endif
2902 }
2903
2904 EV_FREQUENT_CHECK;
2905}
2906
2907void noinline
2908ev_signal_stop (EV_P_ ev_signal *w)
2909{
2910 clear_pending (EV_A_ (W)w);
2911 if (expect_false (!ev_is_active (w)))
2912 return;
2913
2914 EV_FREQUENT_CHECK;
2915
2916 wlist_del (&signals [w->signum - 1].head, (WL)w);
2917 ev_stop (EV_A_ (W)w);
2918
2919 if (!signals [w->signum - 1].head)
2920 {
2921#if EV_MULTIPLICITY
2922 signals [w->signum - 1].loop = 0; /* unattach from signal */
2923#endif
2924#if EV_USE_SIGNALFD
2925 if (sigfd >= 0)
2926 {
2927 sigset_t ss;
2928
2929 sigemptyset (&ss);
2930 sigaddset (&ss, w->signum);
2931 sigdelset (&sigfd_set, w->signum);
2932
2933 signalfd (sigfd, &sigfd_set, 0);
2934 sigprocmask (SIG_UNBLOCK, &ss, 0);
571 } 2935 }
572 else 2936 else
573 ev_periodic_stop (w); /* nonrepeating: stop timer */ 2937#endif
574 2938 signal (w->signum, SIG_DFL);
575 event ((W)w, EV_PERIODIC);
576 }
577}
578
579static void
580periodics_reschedule (ev_tstamp diff)
581{
582 int i;
583
584 /* adjust periodics after time jump */
585 for (i = 0; i < periodiccnt; ++i)
586 { 2939 }
587 struct ev_periodic *w = periodics [i];
588 2940
589 if (w->interval) 2941 EV_FREQUENT_CHECK;
2942}
2943
2944#endif
2945
2946#if EV_CHILD_ENABLE
2947
2948void
2949ev_child_start (EV_P_ ev_child *w)
2950{
2951#if EV_MULTIPLICITY
2952 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2953#endif
2954 if (expect_false (ev_is_active (w)))
2955 return;
2956
2957 EV_FREQUENT_CHECK;
2958
2959 ev_start (EV_A_ (W)w, 1);
2960 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2961
2962 EV_FREQUENT_CHECK;
2963}
2964
2965void
2966ev_child_stop (EV_P_ ev_child *w)
2967{
2968 clear_pending (EV_A_ (W)w);
2969 if (expect_false (!ev_is_active (w)))
2970 return;
2971
2972 EV_FREQUENT_CHECK;
2973
2974 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2975 ev_stop (EV_A_ (W)w);
2976
2977 EV_FREQUENT_CHECK;
2978}
2979
2980#endif
2981
2982#if EV_STAT_ENABLE
2983
2984# ifdef _WIN32
2985# undef lstat
2986# define lstat(a,b) _stati64 (a,b)
2987# endif
2988
2989#define DEF_STAT_INTERVAL 5.0074891
2990#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2991#define MIN_STAT_INTERVAL 0.1074891
2992
2993static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2994
2995#if EV_USE_INOTIFY
2996
2997/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2998# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2999
3000static void noinline
3001infy_add (EV_P_ ev_stat *w)
3002{
3003 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);
3004
3005 if (w->wd >= 0)
3006 {
3007 struct statfs sfs;
3008
3009 /* now local changes will be tracked by inotify, but remote changes won't */
3010 /* unless the filesystem is known to be local, we therefore still poll */
3011 /* also do poll on <2.6.25, but with normal frequency */
3012
3013 if (!fs_2625)
3014 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3015 else if (!statfs (w->path, &sfs)
3016 && (sfs.f_type == 0x1373 /* devfs */
3017 || sfs.f_type == 0xEF53 /* ext2/3 */
3018 || sfs.f_type == 0x3153464a /* jfs */
3019 || sfs.f_type == 0x52654973 /* reiser3 */
3020 || sfs.f_type == 0x01021994 /* tempfs */
3021 || sfs.f_type == 0x58465342 /* xfs */))
3022 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3023 else
3024 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3025 }
3026 else
3027 {
3028 /* can't use inotify, continue to stat */
3029 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3030
3031 /* if path is not there, monitor some parent directory for speedup hints */
3032 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3033 /* but an efficiency issue only */
3034 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
590 { 3035 {
591 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3036 char path [4096];
3037 strcpy (path, w->path);
592 3038
593 if (fabs (diff) >= 1e-4) 3039 do
594 { 3040 {
595 ev_periodic_stop (w); 3041 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
596 ev_periodic_start (w); 3042 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
597 3043
598 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3044 char *pend = strrchr (path, '/');
3045
3046 if (!pend || pend == path)
3047 break;
3048
3049 *pend = 0;
3050 w->wd = inotify_add_watch (fs_fd, path, mask);
3051 }
3052 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3053 }
3054 }
3055
3056 if (w->wd >= 0)
3057 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3058
3059 /* now re-arm timer, if required */
3060 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3061 ev_timer_again (EV_A_ &w->timer);
3062 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3063}
3064
3065static void noinline
3066infy_del (EV_P_ ev_stat *w)
3067{
3068 int slot;
3069 int wd = w->wd;
3070
3071 if (wd < 0)
3072 return;
3073
3074 w->wd = -2;
3075 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3076 wlist_del (&fs_hash [slot].head, (WL)w);
3077
3078 /* remove this watcher, if others are watching it, they will rearm */
3079 inotify_rm_watch (fs_fd, wd);
3080}
3081
3082static void noinline
3083infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3084{
3085 if (slot < 0)
3086 /* overflow, need to check for all hash slots */
3087 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3088 infy_wd (EV_A_ slot, wd, ev);
3089 else
3090 {
3091 WL w_;
3092
3093 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3094 {
3095 ev_stat *w = (ev_stat *)w_;
3096 w_ = w_->next; /* lets us remove this watcher and all before it */
3097
3098 if (w->wd == wd || wd == -1)
3099 {
3100 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3101 {
3102 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3103 w->wd = -1;
3104 infy_add (EV_A_ w); /* re-add, no matter what */
3105 }
3106
3107 stat_timer_cb (EV_A_ &w->timer, 0);
599 } 3108 }
600 } 3109 }
601 } 3110 }
602} 3111}
603 3112
604static void 3113static void
605time_update (void) 3114infy_cb (EV_P_ ev_io *w, int revents)
606{ 3115{
3116 char buf [EV_INOTIFY_BUFSIZE];
607 int i; 3117 int ofs;
3118 int len = read (fs_fd, buf, sizeof (buf));
608 3119
609 ev_now = ev_time (); 3120 for (ofs = 0; ofs < len; )
610 3121 {
611 if (have_monotonic) 3122 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3123 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3124 ofs += sizeof (struct inotify_event) + ev->len;
612 { 3125 }
613 ev_tstamp odiff = diff; 3126}
614 3127
615 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3128inline_size void
3129ev_check_2625 (EV_P)
3130{
3131 /* kernels < 2.6.25 are borked
3132 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3133 */
3134 if (ev_linux_version () < 0x020619)
3135 return;
3136
3137 fs_2625 = 1;
3138}
3139
3140inline_size int
3141infy_newfd (void)
3142{
3143#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3144 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3145 if (fd >= 0)
3146 return fd;
3147#endif
3148 return inotify_init ();
3149}
3150
3151inline_size void
3152infy_init (EV_P)
3153{
3154 if (fs_fd != -2)
3155 return;
3156
3157 fs_fd = -1;
3158
3159 ev_check_2625 (EV_A);
3160
3161 fs_fd = infy_newfd ();
3162
3163 if (fs_fd >= 0)
3164 {
3165 fd_intern (fs_fd);
3166 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3167 ev_set_priority (&fs_w, EV_MAXPRI);
3168 ev_io_start (EV_A_ &fs_w);
3169 ev_unref (EV_A);
3170 }
3171}
3172
3173inline_size void
3174infy_fork (EV_P)
3175{
3176 int slot;
3177
3178 if (fs_fd < 0)
3179 return;
3180
3181 ev_ref (EV_A);
3182 ev_io_stop (EV_A_ &fs_w);
3183 close (fs_fd);
3184 fs_fd = infy_newfd ();
3185
3186 if (fs_fd >= 0)
3187 {
3188 fd_intern (fs_fd);
3189 ev_io_set (&fs_w, fs_fd, EV_READ);
3190 ev_io_start (EV_A_ &fs_w);
3191 ev_unref (EV_A);
3192 }
3193
3194 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3195 {
3196 WL w_ = fs_hash [slot].head;
3197 fs_hash [slot].head = 0;
3198
3199 while (w_)
616 { 3200 {
617 now = get_clock (); 3201 ev_stat *w = (ev_stat *)w_;
618 diff = ev_now - now; 3202 w_ = w_->next; /* lets us add this watcher */
619 3203
620 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3204 w->wd = -1;
621 return; /* all is well */
622 3205
623 ev_now = ev_time (); 3206 if (fs_fd >= 0)
3207 infy_add (EV_A_ w); /* re-add, no matter what */
3208 else
3209 {
3210 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3211 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3212 ev_timer_again (EV_A_ &w->timer);
3213 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3214 }
624 } 3215 }
625
626 periodics_reschedule (diff - odiff);
627 /* no timer adjustment, as the monotonic clock doesn't jump */
628 } 3216 }
3217}
3218
3219#endif
3220
3221#ifdef _WIN32
3222# define EV_LSTAT(p,b) _stati64 (p, b)
3223#else
3224# define EV_LSTAT(p,b) lstat (p, b)
3225#endif
3226
3227void
3228ev_stat_stat (EV_P_ ev_stat *w)
3229{
3230 if (lstat (w->path, &w->attr) < 0)
3231 w->attr.st_nlink = 0;
3232 else if (!w->attr.st_nlink)
3233 w->attr.st_nlink = 1;
3234}
3235
3236static void noinline
3237stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3238{
3239 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3240
3241 ev_statdata prev = w->attr;
3242 ev_stat_stat (EV_A_ w);
3243
3244 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3245 if (
3246 prev.st_dev != w->attr.st_dev
3247 || prev.st_ino != w->attr.st_ino
3248 || prev.st_mode != w->attr.st_mode
3249 || prev.st_nlink != w->attr.st_nlink
3250 || prev.st_uid != w->attr.st_uid
3251 || prev.st_gid != w->attr.st_gid
3252 || prev.st_rdev != w->attr.st_rdev
3253 || prev.st_size != w->attr.st_size
3254 || prev.st_atime != w->attr.st_atime
3255 || prev.st_mtime != w->attr.st_mtime
3256 || prev.st_ctime != w->attr.st_ctime
3257 ) {
3258 /* we only update w->prev on actual differences */
3259 /* in case we test more often than invoke the callback, */
3260 /* to ensure that prev is always different to attr */
3261 w->prev = prev;
3262
3263 #if EV_USE_INOTIFY
3264 if (fs_fd >= 0)
3265 {
3266 infy_del (EV_A_ w);
3267 infy_add (EV_A_ w);
3268 ev_stat_stat (EV_A_ w); /* avoid race... */
3269 }
3270 #endif
3271
3272 ev_feed_event (EV_A_ w, EV_STAT);
3273 }
3274}
3275
3276void
3277ev_stat_start (EV_P_ ev_stat *w)
3278{
3279 if (expect_false (ev_is_active (w)))
3280 return;
3281
3282 ev_stat_stat (EV_A_ w);
3283
3284 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3285 w->interval = MIN_STAT_INTERVAL;
3286
3287 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3288 ev_set_priority (&w->timer, ev_priority (w));
3289
3290#if EV_USE_INOTIFY
3291 infy_init (EV_A);
3292
3293 if (fs_fd >= 0)
3294 infy_add (EV_A_ w);
629 else 3295 else
3296#endif
3297 {
3298 ev_timer_again (EV_A_ &w->timer);
3299 ev_unref (EV_A);
630 { 3300 }
631 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 3301
3302 ev_start (EV_A_ (W)w, 1);
3303
3304 EV_FREQUENT_CHECK;
3305}
3306
3307void
3308ev_stat_stop (EV_P_ ev_stat *w)
3309{
3310 clear_pending (EV_A_ (W)w);
3311 if (expect_false (!ev_is_active (w)))
3312 return;
3313
3314 EV_FREQUENT_CHECK;
3315
3316#if EV_USE_INOTIFY
3317 infy_del (EV_A_ w);
3318#endif
3319
3320 if (ev_is_active (&w->timer))
3321 {
3322 ev_ref (EV_A);
3323 ev_timer_stop (EV_A_ &w->timer);
3324 }
3325
3326 ev_stop (EV_A_ (W)w);
3327
3328 EV_FREQUENT_CHECK;
3329}
3330#endif
3331
3332#if EV_IDLE_ENABLE
3333void
3334ev_idle_start (EV_P_ ev_idle *w)
3335{
3336 if (expect_false (ev_is_active (w)))
3337 return;
3338
3339 pri_adjust (EV_A_ (W)w);
3340
3341 EV_FREQUENT_CHECK;
3342
3343 {
3344 int active = ++idlecnt [ABSPRI (w)];
3345
3346 ++idleall;
3347 ev_start (EV_A_ (W)w, active);
3348
3349 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3350 idles [ABSPRI (w)][active - 1] = w;
3351 }
3352
3353 EV_FREQUENT_CHECK;
3354}
3355
3356void
3357ev_idle_stop (EV_P_ ev_idle *w)
3358{
3359 clear_pending (EV_A_ (W)w);
3360 if (expect_false (!ev_is_active (w)))
3361 return;
3362
3363 EV_FREQUENT_CHECK;
3364
3365 {
3366 int active = ev_active (w);
3367
3368 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3369 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3370
3371 ev_stop (EV_A_ (W)w);
3372 --idleall;
3373 }
3374
3375 EV_FREQUENT_CHECK;
3376}
3377#endif
3378
3379#if EV_PREPARE_ENABLE
3380void
3381ev_prepare_start (EV_P_ ev_prepare *w)
3382{
3383 if (expect_false (ev_is_active (w)))
3384 return;
3385
3386 EV_FREQUENT_CHECK;
3387
3388 ev_start (EV_A_ (W)w, ++preparecnt);
3389 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3390 prepares [preparecnt - 1] = w;
3391
3392 EV_FREQUENT_CHECK;
3393}
3394
3395void
3396ev_prepare_stop (EV_P_ ev_prepare *w)
3397{
3398 clear_pending (EV_A_ (W)w);
3399 if (expect_false (!ev_is_active (w)))
3400 return;
3401
3402 EV_FREQUENT_CHECK;
3403
3404 {
3405 int active = ev_active (w);
3406
3407 prepares [active - 1] = prepares [--preparecnt];
3408 ev_active (prepares [active - 1]) = active;
3409 }
3410
3411 ev_stop (EV_A_ (W)w);
3412
3413 EV_FREQUENT_CHECK;
3414}
3415#endif
3416
3417#if EV_CHECK_ENABLE
3418void
3419ev_check_start (EV_P_ ev_check *w)
3420{
3421 if (expect_false (ev_is_active (w)))
3422 return;
3423
3424 EV_FREQUENT_CHECK;
3425
3426 ev_start (EV_A_ (W)w, ++checkcnt);
3427 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3428 checks [checkcnt - 1] = w;
3429
3430 EV_FREQUENT_CHECK;
3431}
3432
3433void
3434ev_check_stop (EV_P_ ev_check *w)
3435{
3436 clear_pending (EV_A_ (W)w);
3437 if (expect_false (!ev_is_active (w)))
3438 return;
3439
3440 EV_FREQUENT_CHECK;
3441
3442 {
3443 int active = ev_active (w);
3444
3445 checks [active - 1] = checks [--checkcnt];
3446 ev_active (checks [active - 1]) = active;
3447 }
3448
3449 ev_stop (EV_A_ (W)w);
3450
3451 EV_FREQUENT_CHECK;
3452}
3453#endif
3454
3455#if EV_EMBED_ENABLE
3456void noinline
3457ev_embed_sweep (EV_P_ ev_embed *w)
3458{
3459 ev_run (w->other, EVRUN_NOWAIT);
3460}
3461
3462static void
3463embed_io_cb (EV_P_ ev_io *io, int revents)
3464{
3465 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3466
3467 if (ev_cb (w))
3468 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3469 else
3470 ev_run (w->other, EVRUN_NOWAIT);
3471}
3472
3473static void
3474embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3475{
3476 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3477
3478 {
3479 EV_P = w->other;
3480
3481 while (fdchangecnt)
632 { 3482 {
633 periodics_reschedule (ev_now - now); 3483 fd_reify (EV_A);
634 3484 ev_run (EV_A_ EVRUN_NOWAIT);
635 /* adjust timers. this is easy, as the offset is the same for all */
636 for (i = 0; i < timercnt; ++i)
637 timers [i]->at += diff;
638 } 3485 }
639
640 now = ev_now;
641 } 3486 }
642} 3487}
643 3488
644int ev_loop_done; 3489static void
645 3490embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
646void ev_loop (int flags)
647{ 3491{
648 double block; 3492 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
649 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650 3493
651 do 3494 ev_embed_stop (EV_A_ w);
3495
652 { 3496 {
653 /* queue check watchers (and execute them) */ 3497 EV_P = w->other;
654 if (preparecnt)
655 {
656 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
657 call_pending ();
658 }
659 3498
660 /* update fd-related kernel structures */ 3499 ev_loop_fork (EV_A);
661 fd_reify (); 3500 ev_run (EV_A_ EVRUN_NOWAIT);
662
663 /* calculate blocking time */
664
665 /* we only need this for !monotonic clockor timers, but as we basically
666 always have timers, we just calculate it always */
667 ev_now = ev_time ();
668
669 if (flags & EVLOOP_NONBLOCK || idlecnt)
670 block = 0.;
671 else
672 {
673 block = MAX_BLOCKTIME;
674
675 if (timercnt)
676 {
677 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
678 if (block > to) block = to;
679 }
680
681 if (periodiccnt)
682 {
683 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
684 if (block > to) block = to;
685 }
686
687 if (block < 0.) block = 0.;
688 }
689
690 method_poll (block);
691
692 /* update ev_now, do magic */
693 time_update ();
694
695 /* queue pending timers and reschedule them */
696 timers_reify (); /* relative timers called last */
697 periodics_reify (); /* absolute timers called first */
698
699 /* queue idle watchers unless io or timers are pending */
700 if (!pendingcnt)
701 queue_events ((W *)idles, idlecnt, EV_IDLE);
702
703 /* queue check watchers, to be executed first */
704 if (checkcnt)
705 queue_events ((W *)checks, checkcnt, EV_CHECK);
706
707 call_pending ();
708 } 3501 }
709 while (!ev_loop_done);
710 3502
711 if (ev_loop_done != 2) 3503 ev_embed_start (EV_A_ w);
712 ev_loop_done = 0;
713} 3504}
3505
3506#if 0
3507static void
3508embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3509{
3510 ev_idle_stop (EV_A_ idle);
3511}
3512#endif
3513
3514void
3515ev_embed_start (EV_P_ ev_embed *w)
3516{
3517 if (expect_false (ev_is_active (w)))
3518 return;
3519
3520 {
3521 EV_P = w->other;
3522 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3523 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3524 }
3525
3526 EV_FREQUENT_CHECK;
3527
3528 ev_set_priority (&w->io, ev_priority (w));
3529 ev_io_start (EV_A_ &w->io);
3530
3531 ev_prepare_init (&w->prepare, embed_prepare_cb);
3532 ev_set_priority (&w->prepare, EV_MINPRI);
3533 ev_prepare_start (EV_A_ &w->prepare);
3534
3535 ev_fork_init (&w->fork, embed_fork_cb);
3536 ev_fork_start (EV_A_ &w->fork);
3537
3538 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3539
3540 ev_start (EV_A_ (W)w, 1);
3541
3542 EV_FREQUENT_CHECK;
3543}
3544
3545void
3546ev_embed_stop (EV_P_ ev_embed *w)
3547{
3548 clear_pending (EV_A_ (W)w);
3549 if (expect_false (!ev_is_active (w)))
3550 return;
3551
3552 EV_FREQUENT_CHECK;
3553
3554 ev_io_stop (EV_A_ &w->io);
3555 ev_prepare_stop (EV_A_ &w->prepare);
3556 ev_fork_stop (EV_A_ &w->fork);
3557
3558 ev_stop (EV_A_ (W)w);
3559
3560 EV_FREQUENT_CHECK;
3561}
3562#endif
3563
3564#if EV_FORK_ENABLE
3565void
3566ev_fork_start (EV_P_ ev_fork *w)
3567{
3568 if (expect_false (ev_is_active (w)))
3569 return;
3570
3571 EV_FREQUENT_CHECK;
3572
3573 ev_start (EV_A_ (W)w, ++forkcnt);
3574 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3575 forks [forkcnt - 1] = w;
3576
3577 EV_FREQUENT_CHECK;
3578}
3579
3580void
3581ev_fork_stop (EV_P_ ev_fork *w)
3582{
3583 clear_pending (EV_A_ (W)w);
3584 if (expect_false (!ev_is_active (w)))
3585 return;
3586
3587 EV_FREQUENT_CHECK;
3588
3589 {
3590 int active = ev_active (w);
3591
3592 forks [active - 1] = forks [--forkcnt];
3593 ev_active (forks [active - 1]) = active;
3594 }
3595
3596 ev_stop (EV_A_ (W)w);
3597
3598 EV_FREQUENT_CHECK;
3599}
3600#endif
3601
3602#if EV_CLEANUP_ENABLE
3603void
3604ev_cleanup_start (EV_P_ ev_cleanup *w)
3605{
3606 if (expect_false (ev_is_active (w)))
3607 return;
3608
3609 EV_FREQUENT_CHECK;
3610
3611 ev_start (EV_A_ (W)w, ++cleanupcnt);
3612 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3613 cleanups [cleanupcnt - 1] = w;
3614
3615 /* cleanup watchers should never keep a refcount on the loop */
3616 ev_unref (EV_A);
3617 EV_FREQUENT_CHECK;
3618}
3619
3620void
3621ev_cleanup_stop (EV_P_ ev_cleanup *w)
3622{
3623 clear_pending (EV_A_ (W)w);
3624 if (expect_false (!ev_is_active (w)))
3625 return;
3626
3627 EV_FREQUENT_CHECK;
3628 ev_ref (EV_A);
3629
3630 {
3631 int active = ev_active (w);
3632
3633 cleanups [active - 1] = cleanups [--cleanupcnt];
3634 ev_active (cleanups [active - 1]) = active;
3635 }
3636
3637 ev_stop (EV_A_ (W)w);
3638
3639 EV_FREQUENT_CHECK;
3640}
3641#endif
3642
3643#if EV_ASYNC_ENABLE
3644void
3645ev_async_start (EV_P_ ev_async *w)
3646{
3647 if (expect_false (ev_is_active (w)))
3648 return;
3649
3650 w->sent = 0;
3651
3652 evpipe_init (EV_A);
3653
3654 EV_FREQUENT_CHECK;
3655
3656 ev_start (EV_A_ (W)w, ++asynccnt);
3657 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3658 asyncs [asynccnt - 1] = w;
3659
3660 EV_FREQUENT_CHECK;
3661}
3662
3663void
3664ev_async_stop (EV_P_ ev_async *w)
3665{
3666 clear_pending (EV_A_ (W)w);
3667 if (expect_false (!ev_is_active (w)))
3668 return;
3669
3670 EV_FREQUENT_CHECK;
3671
3672 {
3673 int active = ev_active (w);
3674
3675 asyncs [active - 1] = asyncs [--asynccnt];
3676 ev_active (asyncs [active - 1]) = active;
3677 }
3678
3679 ev_stop (EV_A_ (W)w);
3680
3681 EV_FREQUENT_CHECK;
3682}
3683
3684void
3685ev_async_send (EV_P_ ev_async *w)
3686{
3687 w->sent = 1;
3688 evpipe_write (EV_A_ &async_pending);
3689}
3690#endif
714 3691
715/*****************************************************************************/ 3692/*****************************************************************************/
716 3693
717static void
718wlist_add (WL *head, WL elem)
719{
720 elem->next = *head;
721 *head = elem;
722}
723
724static void
725wlist_del (WL *head, WL elem)
726{
727 while (*head)
728 {
729 if (*head == elem)
730 {
731 *head = elem->next;
732 return;
733 }
734
735 head = &(*head)->next;
736 }
737}
738
739static void
740ev_clear_pending (W w)
741{
742 if (w->pending)
743 {
744 pendings [w->pending - 1].w = 0;
745 w->pending = 0;
746 }
747}
748
749static void
750ev_start (W w, int active)
751{
752 w->active = active;
753}
754
755static void
756ev_stop (W w)
757{
758 w->active = 0;
759}
760
761/*****************************************************************************/
762
763void
764ev_io_start (struct ev_io *w)
765{
766 if (ev_is_active (w))
767 return;
768
769 int fd = w->fd;
770
771 assert (("ev_io_start called with negative fd", fd >= 0));
772
773 ev_start ((W)w, 1);
774 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775 wlist_add ((WL *)&anfds[fd].head, (WL)w);
776
777 fd_change (fd);
778}
779
780void
781ev_io_stop (struct ev_io *w)
782{
783 ev_clear_pending ((W)w);
784 if (!ev_is_active (w))
785 return;
786
787 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788 ev_stop ((W)w);
789
790 fd_change (w->fd);
791}
792
793void
794ev_timer_start (struct ev_timer *w)
795{
796 if (ev_is_active (w))
797 return;
798
799 w->at += now;
800
801 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802
803 ev_start ((W)w, ++timercnt);
804 array_needsize (timers, timermax, timercnt, );
805 timers [timercnt - 1] = w;
806 upheap ((WT *)timers, timercnt - 1);
807}
808
809void
810ev_timer_stop (struct ev_timer *w)
811{
812 ev_clear_pending ((W)w);
813 if (!ev_is_active (w))
814 return;
815
816 if (w->active < timercnt--)
817 {
818 timers [w->active - 1] = timers [timercnt];
819 downheap ((WT *)timers, timercnt, w->active - 1);
820 }
821
822 w->at = w->repeat;
823
824 ev_stop ((W)w);
825}
826
827void
828ev_timer_again (struct ev_timer *w)
829{
830 if (ev_is_active (w))
831 {
832 if (w->repeat)
833 {
834 w->at = now + w->repeat;
835 downheap ((WT *)timers, timercnt, w->active - 1);
836 }
837 else
838 ev_timer_stop (w);
839 }
840 else if (w->repeat)
841 ev_timer_start (w);
842}
843
844void
845ev_periodic_start (struct ev_periodic *w)
846{
847 if (ev_is_active (w))
848 return;
849
850 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851
852 /* this formula differs from the one in periodic_reify because we do not always round up */
853 if (w->interval)
854 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
855
856 ev_start ((W)w, ++periodiccnt);
857 array_needsize (periodics, periodicmax, periodiccnt, );
858 periodics [periodiccnt - 1] = w;
859 upheap ((WT *)periodics, periodiccnt - 1);
860}
861
862void
863ev_periodic_stop (struct ev_periodic *w)
864{
865 ev_clear_pending ((W)w);
866 if (!ev_is_active (w))
867 return;
868
869 if (w->active < periodiccnt--)
870 {
871 periodics [w->active - 1] = periodics [periodiccnt];
872 downheap ((WT *)periodics, periodiccnt, w->active - 1);
873 }
874
875 ev_stop ((W)w);
876}
877
878void
879ev_signal_start (struct ev_signal *w)
880{
881 if (ev_is_active (w))
882 return;
883
884 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885
886 ev_start ((W)w, 1);
887 array_needsize (signals, signalmax, w->signum, signals_init);
888 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889
890 if (!w->next)
891 {
892 struct sigaction sa;
893 sa.sa_handler = sighandler;
894 sigfillset (&sa.sa_mask);
895 sa.sa_flags = 0;
896 sigaction (w->signum, &sa, 0);
897 }
898}
899
900void
901ev_signal_stop (struct ev_signal *w)
902{
903 ev_clear_pending ((W)w);
904 if (!ev_is_active (w))
905 return;
906
907 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908 ev_stop ((W)w);
909
910 if (!signals [w->signum - 1].head)
911 signal (w->signum, SIG_DFL);
912}
913
914void
915ev_idle_start (struct ev_idle *w)
916{
917 if (ev_is_active (w))
918 return;
919
920 ev_start ((W)w, ++idlecnt);
921 array_needsize (idles, idlemax, idlecnt, );
922 idles [idlecnt - 1] = w;
923}
924
925void
926ev_idle_stop (struct ev_idle *w)
927{
928 ev_clear_pending ((W)w);
929 if (ev_is_active (w))
930 return;
931
932 idles [w->active - 1] = idles [--idlecnt];
933 ev_stop ((W)w);
934}
935
936void
937ev_prepare_start (struct ev_prepare *w)
938{
939 if (ev_is_active (w))
940 return;
941
942 ev_start ((W)w, ++preparecnt);
943 array_needsize (prepares, preparemax, preparecnt, );
944 prepares [preparecnt - 1] = w;
945}
946
947void
948ev_prepare_stop (struct ev_prepare *w)
949{
950 ev_clear_pending ((W)w);
951 if (ev_is_active (w))
952 return;
953
954 prepares [w->active - 1] = prepares [--preparecnt];
955 ev_stop ((W)w);
956}
957
958void
959ev_check_start (struct ev_check *w)
960{
961 if (ev_is_active (w))
962 return;
963
964 ev_start ((W)w, ++checkcnt);
965 array_needsize (checks, checkmax, checkcnt, );
966 checks [checkcnt - 1] = w;
967}
968
969void
970ev_check_stop (struct ev_check *w)
971{
972 ev_clear_pending ((W)w);
973 if (ev_is_active (w))
974 return;
975
976 checks [w->active - 1] = checks [--checkcnt];
977 ev_stop ((W)w);
978}
979
980void
981ev_child_start (struct ev_child *w)
982{
983 if (ev_is_active (w))
984 return;
985
986 ev_start ((W)w, 1);
987 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988}
989
990void
991ev_child_stop (struct ev_child *w)
992{
993 ev_clear_pending ((W)w);
994 if (ev_is_active (w))
995 return;
996
997 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998 ev_stop ((W)w);
999}
1000
1001/*****************************************************************************/
1002
1003struct ev_once 3694struct ev_once
1004{ 3695{
1005 struct ev_io io; 3696 ev_io io;
1006 struct ev_timer to; 3697 ev_timer to;
1007 void (*cb)(int revents, void *arg); 3698 void (*cb)(int revents, void *arg);
1008 void *arg; 3699 void *arg;
1009}; 3700};
1010 3701
1011static void 3702static void
1012once_cb (struct ev_once *once, int revents) 3703once_cb (EV_P_ struct ev_once *once, int revents)
1013{ 3704{
1014 void (*cb)(int revents, void *arg) = once->cb; 3705 void (*cb)(int revents, void *arg) = once->cb;
1015 void *arg = once->arg; 3706 void *arg = once->arg;
1016 3707
1017 ev_io_stop (&once->io); 3708 ev_io_stop (EV_A_ &once->io);
1018 ev_timer_stop (&once->to); 3709 ev_timer_stop (EV_A_ &once->to);
1019 free (once); 3710 ev_free (once);
1020 3711
1021 cb (revents, arg); 3712 cb (revents, arg);
1022} 3713}
1023 3714
1024static void 3715static void
1025once_cb_io (struct ev_io *w, int revents) 3716once_cb_io (EV_P_ ev_io *w, int revents)
1026{ 3717{
1027 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3718 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3719
3720 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1028} 3721}
1029 3722
1030static void 3723static void
1031once_cb_to (struct ev_timer *w, int revents) 3724once_cb_to (EV_P_ ev_timer *w, int revents)
1032{ 3725{
1033 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3726 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1034}
1035 3727
3728 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3729}
3730
1036void 3731void
1037ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3732ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038{ 3733{
1039 struct ev_once *once = malloc (sizeof (struct ev_once)); 3734 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1040 3735
1041 if (!once) 3736 if (expect_false (!once))
3737 {
1042 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3738 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1043 else 3739 return;
1044 { 3740 }
3741
1045 once->cb = cb; 3742 once->cb = cb;
1046 once->arg = arg; 3743 once->arg = arg;
1047 3744
1048 ev_watcher_init (&once->io, once_cb_io); 3745 ev_init (&once->io, once_cb_io);
1049 if (fd >= 0) 3746 if (fd >= 0)
3747 {
3748 ev_io_set (&once->io, fd, events);
3749 ev_io_start (EV_A_ &once->io);
3750 }
3751
3752 ev_init (&once->to, once_cb_to);
3753 if (timeout >= 0.)
3754 {
3755 ev_timer_set (&once->to, timeout, 0.);
3756 ev_timer_start (EV_A_ &once->to);
3757 }
3758}
3759
3760/*****************************************************************************/
3761
3762#if EV_WALK_ENABLE
3763void
3764ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3765{
3766 int i, j;
3767 ev_watcher_list *wl, *wn;
3768
3769 if (types & (EV_IO | EV_EMBED))
3770 for (i = 0; i < anfdmax; ++i)
3771 for (wl = anfds [i].head; wl; )
1050 { 3772 {
1051 ev_io_set (&once->io, fd, events); 3773 wn = wl->next;
1052 ev_io_start (&once->io); 3774
3775#if EV_EMBED_ENABLE
3776 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3777 {
3778 if (types & EV_EMBED)
3779 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3780 }
3781 else
3782#endif
3783#if EV_USE_INOTIFY
3784 if (ev_cb ((ev_io *)wl) == infy_cb)
3785 ;
3786 else
3787#endif
3788 if ((ev_io *)wl != &pipe_w)
3789 if (types & EV_IO)
3790 cb (EV_A_ EV_IO, wl);
3791
3792 wl = wn;
1053 } 3793 }
1054 3794
1055 ev_watcher_init (&once->to, once_cb_to); 3795 if (types & (EV_TIMER | EV_STAT))
1056 if (timeout >= 0.) 3796 for (i = timercnt + HEAP0; i-- > HEAP0; )
3797#if EV_STAT_ENABLE
3798 /*TODO: timer is not always active*/
3799 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1057 { 3800 {
1058 ev_timer_set (&once->to, timeout, 0.); 3801 if (types & EV_STAT)
1059 ev_timer_start (&once->to); 3802 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1060 } 3803 }
1061 } 3804 else
1062} 3805#endif
3806 if (types & EV_TIMER)
3807 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1063 3808
1064/*****************************************************************************/ 3809#if EV_PERIODIC_ENABLE
3810 if (types & EV_PERIODIC)
3811 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3812 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3813#endif
1065 3814
1066#if 0 3815#if EV_IDLE_ENABLE
3816 if (types & EV_IDLE)
3817 for (j = NUMPRI; i--; )
3818 for (i = idlecnt [j]; i--; )
3819 cb (EV_A_ EV_IDLE, idles [j][i]);
3820#endif
1067 3821
1068struct ev_io wio; 3822#if EV_FORK_ENABLE
3823 if (types & EV_FORK)
3824 for (i = forkcnt; i--; )
3825 if (ev_cb (forks [i]) != embed_fork_cb)
3826 cb (EV_A_ EV_FORK, forks [i]);
3827#endif
1069 3828
1070static void 3829#if EV_ASYNC_ENABLE
1071sin_cb (struct ev_io *w, int revents) 3830 if (types & EV_ASYNC)
1072{ 3831 for (i = asynccnt; i--; )
1073 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3832 cb (EV_A_ EV_ASYNC, asyncs [i]);
1074} 3833#endif
1075 3834
1076static void 3835#if EV_PREPARE_ENABLE
1077ocb (struct ev_timer *w, int revents) 3836 if (types & EV_PREPARE)
1078{ 3837 for (i = preparecnt; i--; )
1079 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3838# if EV_EMBED_ENABLE
1080 ev_timer_stop (w); 3839 if (ev_cb (prepares [i]) != embed_prepare_cb)
1081 ev_timer_start (w);
1082}
1083
1084static void
1085scb (struct ev_signal *w, int revents)
1086{
1087 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088 ev_io_stop (&wio);
1089 ev_io_start (&wio);
1090}
1091
1092static void
1093gcb (struct ev_signal *w, int revents)
1094{
1095 fprintf (stderr, "generic %x\n", revents);
1096
1097}
1098
1099int main (void)
1100{
1101 ev_init (0);
1102
1103 ev_io_init (&wio, sin_cb, 0, EV_READ);
1104 ev_io_start (&wio);
1105
1106 struct ev_timer t[10000];
1107
1108#if 0
1109 int i;
1110 for (i = 0; i < 10000; ++i)
1111 {
1112 struct ev_timer *w = t + i;
1113 ev_watcher_init (w, ocb, i);
1114 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115 ev_timer_start (w);
1116 if (drand48 () < 0.5)
1117 ev_timer_stop (w);
1118 }
1119#endif 3840# endif
1120 3841 cb (EV_A_ EV_PREPARE, prepares [i]);
1121 struct ev_timer t1;
1122 ev_timer_init (&t1, ocb, 5, 10);
1123 ev_timer_start (&t1);
1124
1125 struct ev_signal sig;
1126 ev_signal_init (&sig, scb, SIGQUIT);
1127 ev_signal_start (&sig);
1128
1129 struct ev_check cw;
1130 ev_check_init (&cw, gcb);
1131 ev_check_start (&cw);
1132
1133 struct ev_idle iw;
1134 ev_idle_init (&iw, gcb);
1135 ev_idle_start (&iw);
1136
1137 ev_loop (0);
1138
1139 return 0;
1140}
1141
1142#endif 3842#endif
1143 3843
3844#if EV_CHECK_ENABLE
3845 if (types & EV_CHECK)
3846 for (i = checkcnt; i--; )
3847 cb (EV_A_ EV_CHECK, checks [i]);
3848#endif
1144 3849
3850#if EV_SIGNAL_ENABLE
3851 if (types & EV_SIGNAL)
3852 for (i = 0; i < EV_NSIG - 1; ++i)
3853 for (wl = signals [i].head; wl; )
3854 {
3855 wn = wl->next;
3856 cb (EV_A_ EV_SIGNAL, wl);
3857 wl = wn;
3858 }
3859#endif
1145 3860
3861#if EV_CHILD_ENABLE
3862 if (types & EV_CHILD)
3863 for (i = (EV_PID_HASHSIZE); i--; )
3864 for (wl = childs [i]; wl; )
3865 {
3866 wn = wl->next;
3867 cb (EV_A_ EV_CHILD, wl);
3868 wl = wn;
3869 }
3870#endif
3871/* EV_STAT 0x00001000 /* stat data changed */
3872/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3873}
3874#endif
1146 3875
3876#if EV_MULTIPLICITY
3877 #include "ev_wrap.h"
3878#endif
3879
3880EV_CPP(})
3881

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines