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Comparing libev/ev.c (file contents):
Revision 1.42 by root, Fri Nov 2 20:05:05 2007 UTC vs.
Revision 1.367 by root, Tue Jan 11 02:15:58 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 45# include "config.h"
46# endif
47
48# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0
53# endif
54# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1
56# endif
57# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL)
59# define EV_USE_CLOCK_SYSCALL 0
60# endif
61
62# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC
64# define EV_USE_MONOTONIC 1
65# endif
66# ifndef EV_USE_REALTIME
67# define EV_USE_REALTIME 0
68# endif
69# else
70# ifndef EV_USE_MONOTONIC
71# define EV_USE_MONOTONIC 0
72# endif
73# ifndef EV_USE_REALTIME
74# define EV_USE_REALTIME 0
75# endif
76# endif
77
78# if HAVE_NANOSLEEP
79# ifndef EV_USE_NANOSLEEP
80# define EV_USE_NANOSLEEP EV_FEATURE_OS
81# endif
82# else
83# undef EV_USE_NANOSLEEP
84# define EV_USE_NANOSLEEP 0
85# endif
86
87# if HAVE_SELECT && HAVE_SYS_SELECT_H
88# ifndef EV_USE_SELECT
89# define EV_USE_SELECT EV_FEATURE_BACKENDS
90# endif
91# else
92# undef EV_USE_SELECT
93# define EV_USE_SELECT 0
94# endif
95
96# if HAVE_POLL && HAVE_POLL_H
97# ifndef EV_USE_POLL
98# define EV_USE_POLL EV_FEATURE_BACKENDS
99# endif
100# else
101# undef EV_USE_POLL
102# define EV_USE_POLL 0
103# endif
104
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# ifndef EV_USE_EPOLL
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif
109# else
110# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0
112# endif
113
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# endif
118# else
119# undef EV_USE_KQUEUE
120# define EV_USE_KQUEUE 0
121# endif
122
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# ifndef EV_USE_PORT
125# define EV_USE_PORT EV_FEATURE_BACKENDS
126# endif
127# else
128# undef EV_USE_PORT
129# define EV_USE_PORT 0
130# endif
131
132# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
133# ifndef EV_USE_INOTIFY
134# define EV_USE_INOTIFY EV_FEATURE_OS
135# endif
136# else
137# undef EV_USE_INOTIFY
138# define EV_USE_INOTIFY 0
139# endif
140
141# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
142# ifndef EV_USE_SIGNALFD
143# define EV_USE_SIGNALFD EV_FEATURE_OS
144# endif
145# else
146# undef EV_USE_SIGNALFD
147# define EV_USE_SIGNALFD 0
148# endif
149
150# if HAVE_EVENTFD
151# ifndef EV_USE_EVENTFD
152# define EV_USE_EVENTFD EV_FEATURE_OS
153# endif
154# else
155# undef EV_USE_EVENTFD
156# define EV_USE_EVENTFD 0
157# endif
158
33#endif 159#endif
34 160
35#include <math.h> 161#include <math.h>
36#include <stdlib.h> 162#include <stdlib.h>
37#include <unistd.h> 163#include <string.h>
38#include <fcntl.h> 164#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 165#include <stddef.h>
41 166
42#include <stdio.h> 167#include <stdio.h>
43 168
44#include <assert.h> 169#include <assert.h>
45#include <errno.h> 170#include <errno.h>
46#include <sys/types.h> 171#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 172#include <time.h>
173#include <limits.h>
50 174
51/**/ 175#include <signal.h>
176
177#ifdef EV_H
178# include EV_H
179#else
180# include "ev.h"
181#endif
182
183EV_CPP(extern "C" {)
184
185#ifndef _WIN32
186# include <sys/time.h>
187# include <sys/wait.h>
188# include <unistd.h>
189#else
190# include <io.h>
191# define WIN32_LEAN_AND_MEAN
192# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1
195# endif
196# undef EV_AVOID_STDIO
197#endif
198
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */
208
209/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG)
211/* use what's provided */
212#elif defined (NSIG)
213# define EV_NSIG (NSIG)
214#elif defined(_NSIG)
215# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX)
217# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX)
219# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX)
221# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG)
223# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG)
225# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE)
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig)
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else
231# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */
234# define EV_NSIG 65
235#endif
236
237#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else
241# define EV_USE_CLOCK_SYSCALL 0
242# endif
243#endif
52 244
53#ifndef EV_USE_MONOTONIC 245#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else
54# define EV_USE_MONOTONIC 1 249# define EV_USE_MONOTONIC 0
250# endif
251#endif
252
253#ifndef EV_USE_REALTIME
254# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
255#endif
256
257#ifndef EV_USE_NANOSLEEP
258# if _POSIX_C_SOURCE >= 199309L
259# define EV_USE_NANOSLEEP EV_FEATURE_OS
260# else
261# define EV_USE_NANOSLEEP 0
262# endif
55#endif 263#endif
56 264
57#ifndef EV_USE_SELECT 265#ifndef EV_USE_SELECT
58# define EV_USE_SELECT 1 266# define EV_USE_SELECT EV_FEATURE_BACKENDS
59#endif 267#endif
60 268
61#ifndef EV_USE_POLL 269#ifndef EV_USE_POLL
62# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 270# ifdef _WIN32
271# define EV_USE_POLL 0
272# else
273# define EV_USE_POLL EV_FEATURE_BACKENDS
274# endif
63#endif 275#endif
64 276
65#ifndef EV_USE_EPOLL 277#ifndef EV_USE_EPOLL
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_EPOLL EV_FEATURE_BACKENDS
280# else
66# define EV_USE_EPOLL 0 281# define EV_USE_EPOLL 0
67#endif 282# endif
283#endif
68 284
285#ifndef EV_USE_KQUEUE
286# define EV_USE_KQUEUE 0
287#endif
288
69#ifndef EV_USE_REALTIME 289#ifndef EV_USE_PORT
70# define EV_USE_REALTIME 1 290# define EV_USE_PORT 0
291#endif
292
293#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS
296# else
297# define EV_USE_INOTIFY 0
71#endif 298# endif
299#endif
72 300
73/**/ 301#ifndef EV_PID_HASHSIZE
302# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
303#endif
304
305#ifndef EV_INOTIFY_HASHSIZE
306# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
307#endif
308
309#ifndef EV_USE_EVENTFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_EVENTFD EV_FEATURE_OS
312# else
313# define EV_USE_EVENTFD 0
314# endif
315#endif
316
317#ifndef EV_USE_SIGNALFD
318# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
319# define EV_USE_SIGNALFD EV_FEATURE_OS
320# else
321# define EV_USE_SIGNALFD 0
322# endif
323#endif
324
325#if 0 /* debugging */
326# define EV_VERIFY 3
327# define EV_USE_4HEAP 1
328# define EV_HEAP_CACHE_AT 1
329#endif
330
331#ifndef EV_VERIFY
332# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
333#endif
334
335#ifndef EV_USE_4HEAP
336# define EV_USE_4HEAP EV_FEATURE_DATA
337#endif
338
339#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif
342
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h>
347# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1
351# else
352# undef EV_USE_CLOCK_SYSCALL
353# define EV_USE_CLOCK_SYSCALL 0
354# endif
355#endif
356
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
74 364
75#ifndef CLOCK_MONOTONIC 365#ifndef CLOCK_MONOTONIC
76# undef EV_USE_MONOTONIC 366# undef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0 367# define EV_USE_MONOTONIC 0
78#endif 368#endif
… …
80#ifndef CLOCK_REALTIME 370#ifndef CLOCK_REALTIME
81# undef EV_USE_REALTIME 371# undef EV_USE_REALTIME
82# define EV_USE_REALTIME 0 372# define EV_USE_REALTIME 0
83#endif 373#endif
84 374
375#if !EV_STAT_ENABLE
376# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0
378#endif
379
380#if !EV_USE_NANOSLEEP
381# ifndef _WIN32
382# include <sys/select.h>
383# endif
384#endif
385
386#if EV_USE_INOTIFY
387# include <sys/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
85/**/ 438/**/
86 439
440#if EV_VERIFY >= 3
441# define EV_FREQUENT_CHECK ev_verify (EV_A)
442#else
443# define EV_FREQUENT_CHECK do { } while (0)
444#endif
445
446/*
447 * This is used to avoid floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */
454#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
455
87#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) */
88#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
89#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
90/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
91 458
92#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)
93 461
94#if __GNUC__ >= 3 462#if __GNUC__ >= 4
95# define expect(expr,value) __builtin_expect ((expr),(value)) 463# define expect(expr,value) __builtin_expect ((expr),(value))
96# define inline inline 464# define noinline __attribute__ ((noinline))
97#else 465#else
98# define expect(expr,value) (expr) 466# define expect(expr,value) (expr)
99# define inline static 467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif
100#endif 471#endif
101 472
102#define expect_false(expr) expect ((expr) != 0, 0) 473#define expect_false(expr) expect ((expr) != 0, 0)
103#define expect_true(expr) expect ((expr) != 0, 1) 474#define expect_true(expr) expect ((expr) != 0, 1)
475#define inline_size static inline
104 476
477#if EV_FEATURE_CODE
478# define inline_speed static inline
479#else
480# define inline_speed static noinline
481#endif
482
105#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
484
485#if EV_MINPRI == EV_MAXPRI
486# define ABSPRI(w) (((W)w), 0)
487#else
106#define ABSPRI(w) ((w)->priority - EV_MINPRI) 488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif
107 490
491#define EMPTY /* required for microsofts broken pseudo-c compiler */
492#define EMPTY2(a,b) /* used to suppress some warnings */
493
108typedef struct ev_watcher *W; 494typedef ev_watcher *W;
109typedef struct ev_watcher_list *WL; 495typedef ev_watcher_list *WL;
110typedef struct ev_watcher_time *WT; 496typedef ev_watcher_time *WT;
111 497
112static ev_tstamp now_floor, now, diff; /* monotonic clock */ 498#define ev_active(w) ((W)(w))->active
113ev_tstamp ev_now; 499#define ev_at(w) ((WT)(w))->at
114int ev_method;
115 500
116static 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
117 506
118static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 507#if EV_USE_MONOTONIC
119static void (*method_modify)(int fd, int oev, int nev); 508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
120static 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
121 524
122/*****************************************************************************/ 525/*****************************************************************************/
123 526
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
124ev_tstamp 755ev_tstamp
125ev_time (void) 756ev_time (void)
126{ 757{
127#if EV_USE_REALTIME 758#if EV_USE_REALTIME
759 if (expect_true (have_realtime))
760 {
128 struct timespec ts; 761 struct timespec ts;
129 clock_gettime (CLOCK_REALTIME, &ts); 762 clock_gettime (CLOCK_REALTIME, &ts);
130 return ts.tv_sec + ts.tv_nsec * 1e-9; 763 return ts.tv_sec + ts.tv_nsec * 1e-9;
131#else 764 }
765#endif
766
132 struct timeval tv; 767 struct timeval tv;
133 gettimeofday (&tv, 0); 768 gettimeofday (&tv, 0);
134 return tv.tv_sec + tv.tv_usec * 1e-6; 769 return tv.tv_sec + tv.tv_usec * 1e-6;
135#endif
136} 770}
771#endif
137 772
138static ev_tstamp 773inline_size ev_tstamp
139get_clock (void) 774get_clock (void)
140{ 775{
141#if EV_USE_MONOTONIC 776#if EV_USE_MONOTONIC
142 if (expect_true (have_monotonic)) 777 if (expect_true (have_monotonic))
143 { 778 {
… …
148#endif 783#endif
149 784
150 return ev_time (); 785 return ev_time ();
151} 786}
152 787
153#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
154 795
155#define array_needsize(base,cur,cnt,init) \ 796void
156 if (expect_false ((cnt) > cur)) \ 797ev_sleep (ev_tstamp delay)
157 { \ 798{
158 int newcnt = cur; \ 799 if (delay > 0.)
159 do \
160 { \
161 newcnt = array_roundsize (base, newcnt << 1); \
162 } \
163 while ((cnt) > newcnt); \
164 \
165 base = realloc (base, sizeof (*base) * (newcnt)); \
166 init (base + cur, newcnt - cur); \
167 cur = newcnt; \
168 } 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}
169 819
170/*****************************************************************************/ 820/*****************************************************************************/
171 821
172typedef struct 822#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
173{
174 struct ev_io *head;
175 unsigned char events;
176 unsigned char reify;
177} ANFD;
178 823
179static ANFD *anfds; 824/* find a suitable new size for the given array, */
180static int anfdmax; 825/* hopefully by rounding to a nice-to-malloc size */
181 826inline_size int
182static void 827array_nextsize (int elem, int cur, int cnt)
183anfds_init (ANFD *base, int count)
184{ 828{
185 while (count--) 829 int ncur = cur + 1;
186 {
187 base->head = 0;
188 base->events = EV_NONE;
189 base->reify = 0;
190 830
191 ++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)
192 } 837 {
193} 838 ncur *= elem;
194 839 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
195typedef struct 840 ncur = ncur - sizeof (void *) * 4;
196{ 841 ncur /= elem;
197 W w;
198 int events;
199} ANPENDING;
200
201static ANPENDING *pendings [NUMPRI];
202static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
203
204static void
205event (W w, int events)
206{
207 if (w->pending)
208 { 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_;
209 pendings [ABSPRI (w)][w->pending - 1].events |= events; 900 pendings [pri][w_->pending - 1].events = revents;
210 return;
211 } 901 }
212
213 w->pending = ++pendingcnt [ABSPRI (w)];
214 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
215 pendings [ABSPRI (w)][w->pending - 1].w = w;
216 pendings [ABSPRI (w)][w->pending - 1].events = events;
217} 902}
218 903
219static 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
220queue_events (W *events, int eventcnt, int type) 920queue_events (EV_P_ W *events, int eventcnt, int type)
221{ 921{
222 int i; 922 int i;
223 923
224 for (i = 0; i < eventcnt; ++i) 924 for (i = 0; i < eventcnt; ++i)
225 event (events [i], type); 925 ev_feed_event (EV_A_ events [i], type);
226} 926}
227 927
228static void 928/*****************************************************************************/
929
930inline_speed void
229fd_event (int fd, int events) 931fd_event_nocheck (EV_P_ int fd, int revents)
230{ 932{
231 ANFD *anfd = anfds + fd; 933 ANFD *anfd = anfds + fd;
232 struct ev_io *w; 934 ev_io *w;
233 935
234 for (w = anfd->head; w; w = w->next) 936 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
235 { 937 {
236 int ev = w->events & events; 938 int ev = w->events & revents;
237 939
238 if (ev) 940 if (ev)
239 event ((W)w, ev); 941 ev_feed_event (EV_A_ (W)w, ev);
240 } 942 }
241} 943}
242 944
243/*****************************************************************************/ 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;
244 951
245static int *fdchanges; 952 if (expect_true (!anfd->reify))
246static int fdchangemax, fdchangecnt; 953 fd_event_nocheck (EV_A_ fd, revents);
954}
247 955
248static void 956void
249fd_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)
250{ 967{
251 int i; 968 int i;
252 969
253 for (i = 0; i < fdchangecnt; ++i) 970 for (i = 0; i < fdchangecnt; ++i)
254 { 971 {
255 int fd = fdchanges [i]; 972 int fd = fdchanges [i];
256 ANFD *anfd = anfds + fd; 973 ANFD *anfd = anfds + fd;
257 struct ev_io *w; 974 ev_io *w;
258 975
259 int events = 0; 976 unsigned char o_events = anfd->events;
977 unsigned char o_reify = anfd->reify;
260 978
261 for (w = anfd->head; w; w = w->next)
262 events |= w->events;
263
264 anfd->reify = 0; 979 anfd->reify = 0;
265 980
266 if (anfd->events != events) 981#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
982 if (o_reify & EV__IOFDSET)
267 { 983 {
268 method_modify (fd, anfd->events, events); 984 unsigned long arg;
269 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
270 } 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);
271 } 1004 }
272 1005
273 fdchangecnt = 0; 1006 fdchangecnt = 0;
274} 1007}
275 1008
276static void 1009/* something about the given fd changed */
277fd_change (int fd) 1010inline_size void
1011fd_change (EV_P_ int fd, int flags)
278{ 1012{
279 if (anfds [fd].reify || fdchangecnt < 0) 1013 unsigned char reify = anfds [fd].reify;
280 return;
281
282 anfds [fd].reify = 1; 1014 anfds [fd].reify |= flags;
283 1015
1016 if (expect_true (!reify))
1017 {
284 ++fdchangecnt; 1018 ++fdchangecnt;
285 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1019 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
286 fdchanges [fdchangecnt - 1] = fd; 1020 fdchanges [fdchangecnt - 1] = fd;
1021 }
287} 1022}
288 1023
289static void 1024/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1025inline_speed void
290fd_kill (int fd) 1026fd_kill (EV_P_ int fd)
291{ 1027{
292 struct ev_io *w; 1028 ev_io *w;
293 1029
294 printf ("killing fd %d\n", fd);//D
295 while ((w = anfds [fd].head)) 1030 while ((w = (ev_io *)anfds [fd].head))
296 { 1031 {
297 ev_io_stop (w); 1032 ev_io_stop (EV_A_ w);
298 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 1033 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
299 } 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
300} 1046}
301 1047
302/* called on EBADF to verify fds */ 1048/* called on EBADF to verify fds */
303static void 1049static void noinline
304fd_ebadf (void) 1050fd_ebadf (EV_P)
305{ 1051{
306 int fd; 1052 int fd;
307 1053
308 for (fd = 0; fd < anfdmax; ++fd) 1054 for (fd = 0; fd < anfdmax; ++fd)
309 if (anfds [fd].events) 1055 if (anfds [fd].events)
310 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1056 if (!fd_valid (fd) && errno == EBADF)
311 fd_kill (fd); 1057 fd_kill (EV_A_ fd);
312} 1058}
313 1059
314/* called on ENOMEM in select/poll to kill some fds and retry */ 1060/* called on ENOMEM in select/poll to kill some fds and retry */
315static void 1061static void noinline
316fd_enomem (void) 1062fd_enomem (EV_P)
317{ 1063{
318 int fd = anfdmax; 1064 int fd;
319 1065
320 while (fd--) 1066 for (fd = anfdmax; fd--; )
321 if (anfds [fd].events) 1067 if (anfds [fd].events)
322 { 1068 {
323 close (fd);
324 fd_kill (fd); 1069 fd_kill (EV_A_ fd);
325 return; 1070 break;
326 } 1071 }
327} 1072}
328 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
329/*****************************************************************************/ 1103/*****************************************************************************/
330 1104
331static struct ev_timer **timers; 1105/*
332static int timermax, timercnt; 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 */
333 1110
334static struct ev_periodic **periodics; 1111/*
335static int periodicmax, periodiccnt; 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
336 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) */
337static void 1329static void
338upheap (WT *timers, int k) 1330pipecb (EV_P_ ev_io *iow, int revents)
339{ 1331{
340 WT w = timers [k]; 1332 int i;
341 1333
342 while (k && timers [k >> 1]->at > w->at) 1334#if EV_USE_EVENTFD
343 { 1335 if (evfd >= 0)
344 timers [k] = timers [k >> 1];
345 timers [k]->active = k + 1;
346 k >>= 1;
347 } 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 }
348 1347
349 timers [k] = w; 1348 if (sig_pending)
350 timers [k]->active = k + 1; 1349 {
1350 sig_pending = 0;
351 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)
1364 {
1365 asyncs [i]->sent = 0;
1366 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1367 }
1368 }
1369#endif
1370}
1371
1372/*****************************************************************************/
1373
1374void
1375ev_feed_signal (int signum)
1376{
1377#if EV_MULTIPLICITY
1378 EV_P = signals [signum - 1].loop;
1379
1380 if (!EV_A)
1381 return;
1382#endif
1383
1384 signals [signum - 1].pending = 1;
1385 evpipe_write (EV_A_ &sig_pending);
352} 1386}
353 1387
354static void 1388static void
355downheap (WT *timers, int N, int k) 1389ev_sighandler (int signum)
356{ 1390{
357 WT w = timers [k]; 1391#ifdef _WIN32
1392 signal (signum, ev_sighandler);
1393#endif
358 1394
359 while (k < (N >> 1)) 1395 ev_feed_signal (signum);
360 { 1396}
361 int j = k << 1;
362 1397
363 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1398void noinline
364 ++j; 1399ev_feed_signal_event (EV_P_ int signum)
1400{
1401 WL w;
365 1402
366 if (w->at <= timers [j]->at) 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
1423static void
1424sigfdcb (EV_P_ ev_io *iow, int revents)
1425{
1426 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1427
1428 for (;;)
1429 {
1430 ssize_t res = read (sigfd, si, sizeof (si));
1431
1432 /* not ISO-C, as res might be -1, but works with SuS */
1433 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1434 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1435
1436 if (res < (ssize_t)sizeof (si))
367 break; 1437 break;
368
369 timers [k] = timers [j];
370 timers [k]->active = k + 1;
371 k = j;
372 } 1438 }
373
374 timers [k] = w;
375 timers [k]->active = k + 1;
376} 1439}
1440#endif
1441
1442#endif
377 1443
378/*****************************************************************************/ 1444/*****************************************************************************/
379 1445
380typedef struct 1446#if EV_CHILD_ENABLE
381{ 1447static WL childs [EV_PID_HASHSIZE];
382 struct ev_signal *head;
383 sig_atomic_t volatile gotsig;
384} ANSIG;
385 1448
386static ANSIG *signals;
387static int signalmax;
388
389static int sigpipe [2];
390static sig_atomic_t volatile gotsig;
391static struct ev_io sigev;
392
393static void
394signals_init (ANSIG *base, int count)
395{
396 while (count--)
397 {
398 base->head = 0;
399 base->gotsig = 0;
400
401 ++base;
402 }
403}
404
405static void
406sighandler (int signum)
407{
408 signals [signum - 1].gotsig = 1;
409
410 if (!gotsig)
411 {
412 gotsig = 1;
413 write (sigpipe [1], &signum, 1);
414 }
415}
416
417static void
418sigcb (struct ev_io *iow, int revents)
419{
420 struct ev_signal *w;
421 int signum;
422
423 read (sigpipe [0], &revents, 1);
424 gotsig = 0;
425
426 for (signum = signalmax; signum--; )
427 if (signals [signum].gotsig)
428 {
429 signals [signum].gotsig = 0;
430
431 for (w = signals [signum].head; w; w = w->next)
432 event ((W)w, EV_SIGNAL);
433 }
434}
435
436static void
437siginit (void)
438{
439 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
440 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
441
442 /* rather than sort out wether we really need nb, set it */
443 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
444 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
445
446 ev_io_set (&sigev, sigpipe [0], EV_READ);
447 ev_io_start (&sigev);
448}
449
450/*****************************************************************************/
451
452static struct ev_idle **idles;
453static int idlemax, idlecnt;
454
455static struct ev_prepare **prepares;
456static int preparemax, preparecnt;
457
458static struct ev_check **checks;
459static int checkmax, checkcnt;
460
461/*****************************************************************************/
462
463static struct ev_child *childs [PID_HASHSIZE];
464static struct ev_signal childev; 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}
465 1474
466#ifndef WCONTINUED 1475#ifndef WCONTINUED
467# define WCONTINUED 0 1476# define WCONTINUED 0
468#endif 1477#endif
469 1478
1479/* called on sigchld etc., calls waitpid */
470static void 1480static void
471childcb (struct ev_signal *sw, int revents) 1481childcb (EV_P_ ev_signal *sw, int revents)
472{ 1482{
473 struct ev_child *w;
474 int pid, status; 1483 int pid, status;
475 1484
1485 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
476 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1486 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
477 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1487 if (!WCONTINUED
478 if (w->pid == pid || !w->pid) 1488 || errno != EINVAL
479 { 1489 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
480 w->status = status; 1490 return;
481 event ((W)w, EV_CHILD); 1491
482 } 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 */
483} 1499}
1500
1501#endif
484 1502
485/*****************************************************************************/ 1503/*****************************************************************************/
486 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
487#if EV_USE_EPOLL 1514#if EV_USE_EPOLL
488# include "ev_epoll.c" 1515# include "ev_epoll.c"
489#endif 1516#endif
490#if EV_USE_POLL 1517#if EV_USE_POLL
491# include "ev_poll.c" 1518# include "ev_poll.c"
… …
504ev_version_minor (void) 1531ev_version_minor (void)
505{ 1532{
506 return EV_VERSION_MINOR; 1533 return EV_VERSION_MINOR;
507} 1534}
508 1535
509/* return true if we are running with elevated privileges and ignore env variables */ 1536/* return true if we are running with elevated privileges and should ignore env variables */
510static int 1537int inline_size
511enable_secure () 1538enable_secure (void)
512{ 1539{
1540#ifdef _WIN32
1541 return 0;
1542#else
513 return getuid () != geteuid () 1543 return getuid () != geteuid ()
514 || getgid () != getegid (); 1544 || getgid () != getegid ();
1545#endif
515} 1546}
516 1547
517int ev_init (int methods) 1548unsigned int
1549ev_supported_backends (void)
518{ 1550{
519 if (!ev_method) 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)
520 { 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
521#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)
522 { 1988 {
523 struct timespec ts; 1989 verify_watcher (EV_A_ (W)w);
524 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1990 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
525 have_monotonic = 1; 1991 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
526 } 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
527#endif 2042# endif
528
529 ev_now = ev_time ();
530 now = get_clock ();
531 now_floor = now;
532 diff = ev_now - now;
533
534 if (pipe (sigpipe))
535 return 0;
536
537 if (methods == EVMETHOD_AUTO)
538 if (!enable_secure () && getenv ("LIBEV_METHODS"))
539 methods = atoi (getenv ("LIBEV_METHODS"));
540 else
541 methods = EVMETHOD_ANY;
542
543 ev_method = 0;
544#if EV_USE_EPOLL
545 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
546#endif 2043#endif
547#if EV_USE_POLL 2044}
548 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
549#endif 2045#endif
550#if EV_USE_SELECT
551 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
552#endif
553 2046
554 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))
555 { 2065 {
556 ev_watcher_init (&sigev, sigcb); 2066#if EV_CHILD_ENABLE
557 siginit ();
558
559 ev_signal_init (&childev, childcb, SIGCHLD); 2067 ev_signal_init (&childev, childcb, SIGCHLD);
2068 ev_set_priority (&childev, EV_MAXPRI);
560 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
561 } 2072 }
2073 else
2074 ev_default_loop_ptr = 0;
562 } 2075 }
563 2076
564 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 */
565} 2084}
566 2085
567/*****************************************************************************/ 2086/*****************************************************************************/
568 2087
569void 2088void
570ev_fork_prepare (void) 2089ev_invoke (EV_P_ void *w, int revents)
571{ 2090{
572 /* nop */ 2091 EV_CB_INVOKE ((W)w, revents);
573} 2092}
574 2093
575void 2094unsigned int
576ev_fork_parent (void) 2095ev_pending_count (EV_P)
577{ 2096{
578 /* nop */ 2097 int pri;
579} 2098 unsigned int count = 0;
580 2099
581void 2100 for (pri = NUMPRI; pri--; )
582ev_fork_child (void) 2101 count += pendingcnt [pri];
583{
584#if EV_USE_EPOLL
585 if (ev_method == EVMETHOD_EPOLL)
586 epoll_postfork_child ();
587#endif
588 2102
589 ev_io_stop (&sigev); 2103 return count;
590 close (sigpipe [0]);
591 close (sigpipe [1]);
592 pipe (sigpipe);
593 siginit ();
594} 2104}
595 2105
596/*****************************************************************************/ 2106void noinline
597 2107ev_invoke_pending (EV_P)
598static void
599call_pending (void)
600{ 2108{
601 int pri; 2109 int pri;
602 2110
603 for (pri = NUMPRI; pri--; ) 2111 for (pri = NUMPRI; pri--; )
604 while (pendingcnt [pri]) 2112 while (pendingcnt [pri])
605 { 2113 {
606 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2114 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
607 2115
608 if (p->w) 2116 p->w->pending = 0;
2117 EV_CB_INVOKE (p->w, p->events);
2118 EV_FREQUENT_CHECK;
2119 }
2120}
2121
2122#if EV_IDLE_ENABLE
2123/* make idle watchers pending. this handles the "call-idle */
2124/* only when higher priorities are idle" logic */
2125inline_size void
2126idle_reify (EV_P)
2127{
2128 if (expect_false (idleall))
2129 {
2130 int pri;
2131
2132 for (pri = NUMPRI; pri--; )
2133 {
2134 if (pendingcnt [pri])
2135 break;
2136
2137 if (idlecnt [pri])
2138 {
2139 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2140 break;
2141 }
2142 }
2143 }
2144}
2145#endif
2146
2147/* make timers pending */
2148inline_size void
2149timers_reify (EV_P)
2150{
2151 EV_FREQUENT_CHECK;
2152
2153 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2154 {
2155 do
2156 {
2157 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2158
2159 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2160
2161 /* first reschedule or stop timer */
2162 if (w->repeat)
2163 {
2164 ev_at (w) += w->repeat;
2165 if (ev_at (w) < mn_now)
2166 ev_at (w) = mn_now;
2167
2168 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2169
2170 ANHE_at_cache (timers [HEAP0]);
2171 downheap (timers, timercnt, HEAP0);
2172 }
2173 else
2174 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2175
2176 EV_FREQUENT_CHECK;
2177 feed_reverse (EV_A_ (W)w);
2178 }
2179 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2180
2181 feed_reverse_done (EV_A_ EV_TIMER);
2182 }
2183}
2184
2185#if EV_PERIODIC_ENABLE
2186/* make periodics pending */
2187inline_size void
2188periodics_reify (EV_P)
2189{
2190 EV_FREQUENT_CHECK;
2191
2192 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2193 {
2194 int feed_count = 0;
2195
2196 do
2197 {
2198 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2199
2200 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2201
2202 /* first reschedule or stop timer */
2203 if (w->reschedule_cb)
2204 {
2205 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2206
2207 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2208
2209 ANHE_at_cache (periodics [HEAP0]);
2210 downheap (periodics, periodiccnt, HEAP0);
2211 }
2212 else if (w->interval)
2213 {
2214 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2215 /* if next trigger time is not sufficiently in the future, put it there */
2216 /* this might happen because of floating point inexactness */
2217 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2218 {
2219 ev_at (w) += w->interval;
2220
2221 /* if interval is unreasonably low we might still have a time in the past */
2222 /* so correct this. this will make the periodic very inexact, but the user */
2223 /* has effectively asked to get triggered more often than possible */
2224 if (ev_at (w) < ev_rt_now)
2225 ev_at (w) = ev_rt_now;
2226 }
2227
2228 ANHE_at_cache (periodics [HEAP0]);
2229 downheap (periodics, periodiccnt, HEAP0);
2230 }
2231 else
2232 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2233
2234 EV_FREQUENT_CHECK;
2235 feed_reverse (EV_A_ (W)w);
2236 }
2237 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2238
2239 feed_reverse_done (EV_A_ EV_PERIODIC);
2240 }
2241}
2242
2243/* simply recalculate all periodics */
2244/* TODO: maybe ensure that at least one event happens when jumping forward? */
2245static void noinline
2246periodics_reschedule (EV_P)
2247{
2248 int i;
2249
2250 /* adjust periodics after time jump */
2251 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2252 {
2253 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2254
2255 if (w->reschedule_cb)
2256 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2257 else if (w->interval)
2258 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2259
2260 ANHE_at_cache (periodics [i]);
2261 }
2262
2263 reheap (periodics, periodiccnt);
2264}
2265#endif
2266
2267/* adjust all timers by a given offset */
2268static void noinline
2269timers_reschedule (EV_P_ ev_tstamp adjust)
2270{
2271 int i;
2272
2273 for (i = 0; i < timercnt; ++i)
2274 {
2275 ANHE *he = timers + i + HEAP0;
2276 ANHE_w (*he)->at += adjust;
2277 ANHE_at_cache (*he);
2278 }
2279}
2280
2281/* fetch new monotonic and realtime times from the kernel */
2282/* also detect if there was a timejump, and act accordingly */
2283inline_speed void
2284time_update (EV_P_ ev_tstamp max_block)
2285{
2286#if EV_USE_MONOTONIC
2287 if (expect_true (have_monotonic))
2288 {
2289 int i;
2290 ev_tstamp odiff = rtmn_diff;
2291
2292 mn_now = get_clock ();
2293
2294 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2295 /* interpolate in the meantime */
2296 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2297 {
2298 ev_rt_now = rtmn_diff + mn_now;
2299 return;
2300 }
2301
2302 now_floor = mn_now;
2303 ev_rt_now = ev_time ();
2304
2305 /* loop a few times, before making important decisions.
2306 * on the choice of "4": one iteration isn't enough,
2307 * in case we get preempted during the calls to
2308 * ev_time and get_clock. a second call is almost guaranteed
2309 * to succeed in that case, though. and looping a few more times
2310 * doesn't hurt either as we only do this on time-jumps or
2311 * in the unlikely event of having been preempted here.
2312 */
2313 for (i = 4; --i; )
2314 {
2315 rtmn_diff = ev_rt_now - mn_now;
2316
2317 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2318 return; /* all is well */
2319
2320 ev_rt_now = ev_time ();
2321 mn_now = get_clock ();
2322 now_floor = mn_now;
2323 }
2324
2325 /* no timer adjustment, as the monotonic clock doesn't jump */
2326 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2327# if EV_PERIODIC_ENABLE
2328 periodics_reschedule (EV_A);
2329# endif
2330 }
2331 else
2332#endif
2333 {
2334 ev_rt_now = ev_time ();
2335
2336 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2337 {
2338 /* adjust timers. this is easy, as the offset is the same for all of them */
2339 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2340#if EV_PERIODIC_ENABLE
2341 periodics_reschedule (EV_A);
2342#endif
2343 }
2344
2345 mn_now = ev_rt_now;
2346 }
2347}
2348
2349void
2350ev_run (EV_P_ int flags)
2351{
2352#if EV_FEATURE_API
2353 ++loop_depth;
2354#endif
2355
2356 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2357
2358 loop_done = EVBREAK_CANCEL;
2359
2360 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2361
2362 do
2363 {
2364#if EV_VERIFY >= 2
2365 ev_verify (EV_A);
2366#endif
2367
2368#ifndef _WIN32
2369 if (expect_false (curpid)) /* penalise the forking check even more */
2370 if (expect_false (getpid () != curpid))
609 { 2371 {
610 p->w->pending = 0; 2372 curpid = getpid ();
611 p->w->cb (p->w, p->events); 2373 postfork = 1;
612 } 2374 }
2375#endif
2376
2377#if EV_FORK_ENABLE
2378 /* we might have forked, so queue fork handlers */
2379 if (expect_false (postfork))
2380 if (forkcnt)
2381 {
2382 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2383 EV_INVOKE_PENDING;
2384 }
2385#endif
2386
2387#if EV_PREPARE_ENABLE
2388 /* queue prepare watchers (and execute them) */
2389 if (expect_false (preparecnt))
2390 {
2391 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2392 EV_INVOKE_PENDING;
2393 }
2394#endif
2395
2396 if (expect_false (loop_done))
2397 break;
2398
2399 /* we might have forked, so reify kernel state if necessary */
2400 if (expect_false (postfork))
2401 loop_fork (EV_A);
2402
2403 /* update fd-related kernel structures */
2404 fd_reify (EV_A);
2405
2406 /* calculate blocking time */
2407 {
2408 ev_tstamp waittime = 0.;
2409 ev_tstamp sleeptime = 0.;
2410
2411 /* remember old timestamp for io_blocktime calculation */
2412 ev_tstamp prev_mn_now = mn_now;
2413
2414 /* update time to cancel out callback processing overhead */
2415 time_update (EV_A_ 1e100);
2416
2417 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
2418 {
2419 waittime = MAX_BLOCKTIME;
2420
2421 if (timercnt)
2422 {
2423 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2424 if (waittime > to) waittime = to;
2425 }
2426
2427#if EV_PERIODIC_ENABLE
2428 if (periodiccnt)
2429 {
2430 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2431 if (waittime > to) waittime = to;
2432 }
2433#endif
2434
2435 /* don't let timeouts decrease the waittime below timeout_blocktime */
2436 if (expect_false (waittime < timeout_blocktime))
2437 waittime = timeout_blocktime;
2438
2439 /* extra check because io_blocktime is commonly 0 */
2440 if (expect_false (io_blocktime))
2441 {
2442 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2443
2444 if (sleeptime > waittime - backend_fudge)
2445 sleeptime = waittime - backend_fudge;
2446
2447 if (expect_true (sleeptime > 0.))
2448 {
2449 ev_sleep (sleeptime);
2450 waittime -= sleeptime;
2451 }
2452 }
2453 }
2454
2455#if EV_FEATURE_API
2456 ++loop_count;
2457#endif
2458 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2459 backend_poll (EV_A_ waittime);
2460 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2461
2462 /* update ev_rt_now, do magic */
2463 time_update (EV_A_ waittime + sleeptime);
613 } 2464 }
614}
615 2465
616static void 2466 /* queue pending timers and reschedule them */
617timers_reify (void) 2467 timers_reify (EV_A); /* relative timers called last */
2468#if EV_PERIODIC_ENABLE
2469 periodics_reify (EV_A); /* absolute timers called first */
2470#endif
2471
2472#if EV_IDLE_ENABLE
2473 /* queue idle watchers unless other events are pending */
2474 idle_reify (EV_A);
2475#endif
2476
2477#if EV_CHECK_ENABLE
2478 /* queue check watchers, to be executed first */
2479 if (expect_false (checkcnt))
2480 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2481#endif
2482
2483 EV_INVOKE_PENDING;
2484 }
2485 while (expect_true (
2486 activecnt
2487 && !loop_done
2488 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2489 ));
2490
2491 if (loop_done == EVBREAK_ONE)
2492 loop_done = EVBREAK_CANCEL;
2493
2494#if EV_FEATURE_API
2495 --loop_depth;
2496#endif
2497}
2498
2499void
2500ev_break (EV_P_ int how)
618{ 2501{
619 while (timercnt && timers [0]->at <= now) 2502 loop_done = how;
2503}
2504
2505void
2506ev_ref (EV_P)
2507{
2508 ++activecnt;
2509}
2510
2511void
2512ev_unref (EV_P)
2513{
2514 --activecnt;
2515}
2516
2517void
2518ev_now_update (EV_P)
2519{
2520 time_update (EV_A_ 1e100);
2521}
2522
2523void
2524ev_suspend (EV_P)
2525{
2526 ev_now_update (EV_A);
2527}
2528
2529void
2530ev_resume (EV_P)
2531{
2532 ev_tstamp mn_prev = mn_now;
2533
2534 ev_now_update (EV_A);
2535 timers_reschedule (EV_A_ mn_now - mn_prev);
2536#if EV_PERIODIC_ENABLE
2537 /* TODO: really do this? */
2538 periodics_reschedule (EV_A);
2539#endif
2540}
2541
2542/*****************************************************************************/
2543/* singly-linked list management, used when the expected list length is short */
2544
2545inline_size void
2546wlist_add (WL *head, WL elem)
2547{
2548 elem->next = *head;
2549 *head = elem;
2550}
2551
2552inline_size void
2553wlist_del (WL *head, WL elem)
2554{
2555 while (*head)
2556 {
2557 if (expect_true (*head == elem))
2558 {
2559 *head = elem->next;
2560 break;
2561 }
2562
2563 head = &(*head)->next;
2564 }
2565}
2566
2567/* internal, faster, version of ev_clear_pending */
2568inline_speed void
2569clear_pending (EV_P_ W w)
2570{
2571 if (w->pending)
2572 {
2573 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2574 w->pending = 0;
2575 }
2576}
2577
2578int
2579ev_clear_pending (EV_P_ void *w)
2580{
2581 W w_ = (W)w;
2582 int pending = w_->pending;
2583
2584 if (expect_true (pending))
2585 {
2586 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2587 p->w = (W)&pending_w;
2588 w_->pending = 0;
2589 return p->events;
2590 }
2591 else
2592 return 0;
2593}
2594
2595inline_size void
2596pri_adjust (EV_P_ W w)
2597{
2598 int pri = ev_priority (w);
2599 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2600 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2601 ev_set_priority (w, pri);
2602}
2603
2604inline_speed void
2605ev_start (EV_P_ W w, int active)
2606{
2607 pri_adjust (EV_A_ w);
2608 w->active = active;
2609 ev_ref (EV_A);
2610}
2611
2612inline_size void
2613ev_stop (EV_P_ W w)
2614{
2615 ev_unref (EV_A);
2616 w->active = 0;
2617}
2618
2619/*****************************************************************************/
2620
2621void noinline
2622ev_io_start (EV_P_ ev_io *w)
2623{
2624 int fd = w->fd;
2625
2626 if (expect_false (ev_is_active (w)))
2627 return;
2628
2629 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2630 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2631
2632 EV_FREQUENT_CHECK;
2633
2634 ev_start (EV_A_ (W)w, 1);
2635 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2636 wlist_add (&anfds[fd].head, (WL)w);
2637
2638 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2639 w->events &= ~EV__IOFDSET;
2640
2641 EV_FREQUENT_CHECK;
2642}
2643
2644void noinline
2645ev_io_stop (EV_P_ ev_io *w)
2646{
2647 clear_pending (EV_A_ (W)w);
2648 if (expect_false (!ev_is_active (w)))
2649 return;
2650
2651 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2652
2653 EV_FREQUENT_CHECK;
2654
2655 wlist_del (&anfds[w->fd].head, (WL)w);
2656 ev_stop (EV_A_ (W)w);
2657
2658 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2659
2660 EV_FREQUENT_CHECK;
2661}
2662
2663void noinline
2664ev_timer_start (EV_P_ ev_timer *w)
2665{
2666 if (expect_false (ev_is_active (w)))
2667 return;
2668
2669 ev_at (w) += mn_now;
2670
2671 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2672
2673 EV_FREQUENT_CHECK;
2674
2675 ++timercnt;
2676 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2677 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2678 ANHE_w (timers [ev_active (w)]) = (WT)w;
2679 ANHE_at_cache (timers [ev_active (w)]);
2680 upheap (timers, ev_active (w));
2681
2682 EV_FREQUENT_CHECK;
2683
2684 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2685}
2686
2687void noinline
2688ev_timer_stop (EV_P_ ev_timer *w)
2689{
2690 clear_pending (EV_A_ (W)w);
2691 if (expect_false (!ev_is_active (w)))
2692 return;
2693
2694 EV_FREQUENT_CHECK;
2695
2696 {
2697 int active = ev_active (w);
2698
2699 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2700
2701 --timercnt;
2702
2703 if (expect_true (active < timercnt + HEAP0))
620 { 2704 {
621 struct ev_timer *w = timers [0]; 2705 timers [active] = timers [timercnt + HEAP0];
2706 adjustheap (timers, timercnt, active);
2707 }
2708 }
622 2709
623 /* first reschedule or stop timer */ 2710 ev_at (w) -= mn_now;
2711
2712 ev_stop (EV_A_ (W)w);
2713
2714 EV_FREQUENT_CHECK;
2715}
2716
2717void noinline
2718ev_timer_again (EV_P_ ev_timer *w)
2719{
2720 EV_FREQUENT_CHECK;
2721
2722 if (ev_is_active (w))
2723 {
624 if (w->repeat) 2724 if (w->repeat)
625 { 2725 {
626 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
627 w->at = now + w->repeat; 2726 ev_at (w) = mn_now + w->repeat;
628 downheap ((WT *)timers, timercnt, 0); 2727 ANHE_at_cache (timers [ev_active (w)]);
2728 adjustheap (timers, timercnt, ev_active (w));
629 } 2729 }
630 else 2730 else
631 ev_timer_stop (w); /* nonrepeating: stop timer */ 2731 ev_timer_stop (EV_A_ w);
632
633 event ((W)w, EV_TIMEOUT);
634 }
635}
636
637static void
638periodics_reify (void)
639{
640 while (periodiccnt && periodics [0]->at <= ev_now)
641 { 2732 }
642 struct ev_periodic *w = periodics [0]; 2733 else if (w->repeat)
2734 {
2735 ev_at (w) = w->repeat;
2736 ev_timer_start (EV_A_ w);
2737 }
643 2738
644 /* first reschedule or stop timer */ 2739 EV_FREQUENT_CHECK;
2740}
2741
2742ev_tstamp
2743ev_timer_remaining (EV_P_ ev_timer *w)
2744{
2745 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2746}
2747
2748#if EV_PERIODIC_ENABLE
2749void noinline
2750ev_periodic_start (EV_P_ ev_periodic *w)
2751{
2752 if (expect_false (ev_is_active (w)))
2753 return;
2754
2755 if (w->reschedule_cb)
2756 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
645 if (w->interval) 2757 else if (w->interval)
2758 {
2759 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2760 /* this formula differs from the one in periodic_reify because we do not always round up */
2761 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2762 }
2763 else
2764 ev_at (w) = w->offset;
2765
2766 EV_FREQUENT_CHECK;
2767
2768 ++periodiccnt;
2769 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2770 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2771 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2772 ANHE_at_cache (periodics [ev_active (w)]);
2773 upheap (periodics, ev_active (w));
2774
2775 EV_FREQUENT_CHECK;
2776
2777 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2778}
2779
2780void noinline
2781ev_periodic_stop (EV_P_ ev_periodic *w)
2782{
2783 clear_pending (EV_A_ (W)w);
2784 if (expect_false (!ev_is_active (w)))
2785 return;
2786
2787 EV_FREQUENT_CHECK;
2788
2789 {
2790 int active = ev_active (w);
2791
2792 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2793
2794 --periodiccnt;
2795
2796 if (expect_true (active < periodiccnt + HEAP0))
2797 {
2798 periodics [active] = periodics [periodiccnt + HEAP0];
2799 adjustheap (periodics, periodiccnt, active);
2800 }
2801 }
2802
2803 ev_stop (EV_A_ (W)w);
2804
2805 EV_FREQUENT_CHECK;
2806}
2807
2808void noinline
2809ev_periodic_again (EV_P_ ev_periodic *w)
2810{
2811 /* TODO: use adjustheap and recalculation */
2812 ev_periodic_stop (EV_A_ w);
2813 ev_periodic_start (EV_A_ w);
2814}
2815#endif
2816
2817#ifndef SA_RESTART
2818# define SA_RESTART 0
2819#endif
2820
2821#if EV_SIGNAL_ENABLE
2822
2823void noinline
2824ev_signal_start (EV_P_ ev_signal *w)
2825{
2826 if (expect_false (ev_is_active (w)))
2827 return;
2828
2829 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2830
2831#if EV_MULTIPLICITY
2832 assert (("libev: a signal must not be attached to two different loops",
2833 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2834
2835 signals [w->signum - 1].loop = EV_A;
2836#endif
2837
2838 EV_FREQUENT_CHECK;
2839
2840#if EV_USE_SIGNALFD
2841 if (sigfd == -2)
2842 {
2843 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2844 if (sigfd < 0 && errno == EINVAL)
2845 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2846
2847 if (sigfd >= 0)
646 { 2848 {
647 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2849 fd_intern (sigfd); /* doing it twice will not hurt */
648 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 2850
649 downheap ((WT *)periodics, periodiccnt, 0); 2851 sigemptyset (&sigfd_set);
2852
2853 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2854 ev_set_priority (&sigfd_w, EV_MAXPRI);
2855 ev_io_start (EV_A_ &sigfd_w);
2856 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2857 }
2858 }
2859
2860 if (sigfd >= 0)
2861 {
2862 /* TODO: check .head */
2863 sigaddset (&sigfd_set, w->signum);
2864 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2865
2866 signalfd (sigfd, &sigfd_set, 0);
2867 }
2868#endif
2869
2870 ev_start (EV_A_ (W)w, 1);
2871 wlist_add (&signals [w->signum - 1].head, (WL)w);
2872
2873 if (!((WL)w)->next)
2874# if EV_USE_SIGNALFD
2875 if (sigfd < 0) /*TODO*/
2876# endif
2877 {
2878# ifdef _WIN32
2879 evpipe_init (EV_A);
2880
2881 signal (w->signum, ev_sighandler);
2882# else
2883 struct sigaction sa;
2884
2885 evpipe_init (EV_A);
2886
2887 sa.sa_handler = ev_sighandler;
2888 sigfillset (&sa.sa_mask);
2889 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2890 sigaction (w->signum, &sa, 0);
2891
2892 if (origflags & EVFLAG_NOSIGMASK)
2893 {
2894 sigemptyset (&sa.sa_mask);
2895 sigaddset (&sa.sa_mask, w->signum);
2896 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2897 }
2898#endif
2899 }
2900
2901 EV_FREQUENT_CHECK;
2902}
2903
2904void noinline
2905ev_signal_stop (EV_P_ ev_signal *w)
2906{
2907 clear_pending (EV_A_ (W)w);
2908 if (expect_false (!ev_is_active (w)))
2909 return;
2910
2911 EV_FREQUENT_CHECK;
2912
2913 wlist_del (&signals [w->signum - 1].head, (WL)w);
2914 ev_stop (EV_A_ (W)w);
2915
2916 if (!signals [w->signum - 1].head)
2917 {
2918#if EV_MULTIPLICITY
2919 signals [w->signum - 1].loop = 0; /* unattach from signal */
2920#endif
2921#if EV_USE_SIGNALFD
2922 if (sigfd >= 0)
2923 {
2924 sigset_t ss;
2925
2926 sigemptyset (&ss);
2927 sigaddset (&ss, w->signum);
2928 sigdelset (&sigfd_set, w->signum);
2929
2930 signalfd (sigfd, &sigfd_set, 0);
2931 sigprocmask (SIG_UNBLOCK, &ss, 0);
650 } 2932 }
651 else 2933 else
652 ev_periodic_stop (w); /* nonrepeating: stop timer */ 2934#endif
653 2935 signal (w->signum, SIG_DFL);
654 event ((W)w, EV_PERIODIC);
655 }
656}
657
658static void
659periodics_reschedule (ev_tstamp diff)
660{
661 int i;
662
663 /* adjust periodics after time jump */
664 for (i = 0; i < periodiccnt; ++i)
665 { 2936 }
666 struct ev_periodic *w = periodics [i];
667 2937
668 if (w->interval) 2938 EV_FREQUENT_CHECK;
2939}
2940
2941#endif
2942
2943#if EV_CHILD_ENABLE
2944
2945void
2946ev_child_start (EV_P_ ev_child *w)
2947{
2948#if EV_MULTIPLICITY
2949 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2950#endif
2951 if (expect_false (ev_is_active (w)))
2952 return;
2953
2954 EV_FREQUENT_CHECK;
2955
2956 ev_start (EV_A_ (W)w, 1);
2957 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2958
2959 EV_FREQUENT_CHECK;
2960}
2961
2962void
2963ev_child_stop (EV_P_ ev_child *w)
2964{
2965 clear_pending (EV_A_ (W)w);
2966 if (expect_false (!ev_is_active (w)))
2967 return;
2968
2969 EV_FREQUENT_CHECK;
2970
2971 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2972 ev_stop (EV_A_ (W)w);
2973
2974 EV_FREQUENT_CHECK;
2975}
2976
2977#endif
2978
2979#if EV_STAT_ENABLE
2980
2981# ifdef _WIN32
2982# undef lstat
2983# define lstat(a,b) _stati64 (a,b)
2984# endif
2985
2986#define DEF_STAT_INTERVAL 5.0074891
2987#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2988#define MIN_STAT_INTERVAL 0.1074891
2989
2990static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2991
2992#if EV_USE_INOTIFY
2993
2994/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2995# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2996
2997static void noinline
2998infy_add (EV_P_ ev_stat *w)
2999{
3000 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);
3001
3002 if (w->wd >= 0)
3003 {
3004 struct statfs sfs;
3005
3006 /* now local changes will be tracked by inotify, but remote changes won't */
3007 /* unless the filesystem is known to be local, we therefore still poll */
3008 /* also do poll on <2.6.25, but with normal frequency */
3009
3010 if (!fs_2625)
3011 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3012 else if (!statfs (w->path, &sfs)
3013 && (sfs.f_type == 0x1373 /* devfs */
3014 || sfs.f_type == 0xEF53 /* ext2/3 */
3015 || sfs.f_type == 0x3153464a /* jfs */
3016 || sfs.f_type == 0x52654973 /* reiser3 */
3017 || sfs.f_type == 0x01021994 /* tempfs */
3018 || sfs.f_type == 0x58465342 /* xfs */))
3019 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3020 else
3021 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3022 }
3023 else
3024 {
3025 /* can't use inotify, continue to stat */
3026 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3027
3028 /* if path is not there, monitor some parent directory for speedup hints */
3029 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3030 /* but an efficiency issue only */
3031 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
669 { 3032 {
670 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3033 char path [4096];
3034 strcpy (path, w->path);
671 3035
672 if (fabs (diff) >= 1e-4) 3036 do
673 { 3037 {
674 ev_periodic_stop (w); 3038 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
675 ev_periodic_start (w); 3039 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
676 3040
677 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3041 char *pend = strrchr (path, '/');
3042
3043 if (!pend || pend == path)
3044 break;
3045
3046 *pend = 0;
3047 w->wd = inotify_add_watch (fs_fd, path, mask);
3048 }
3049 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3050 }
3051 }
3052
3053 if (w->wd >= 0)
3054 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3055
3056 /* now re-arm timer, if required */
3057 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3058 ev_timer_again (EV_A_ &w->timer);
3059 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3060}
3061
3062static void noinline
3063infy_del (EV_P_ ev_stat *w)
3064{
3065 int slot;
3066 int wd = w->wd;
3067
3068 if (wd < 0)
3069 return;
3070
3071 w->wd = -2;
3072 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3073 wlist_del (&fs_hash [slot].head, (WL)w);
3074
3075 /* remove this watcher, if others are watching it, they will rearm */
3076 inotify_rm_watch (fs_fd, wd);
3077}
3078
3079static void noinline
3080infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3081{
3082 if (slot < 0)
3083 /* overflow, need to check for all hash slots */
3084 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3085 infy_wd (EV_A_ slot, wd, ev);
3086 else
3087 {
3088 WL w_;
3089
3090 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3091 {
3092 ev_stat *w = (ev_stat *)w_;
3093 w_ = w_->next; /* lets us remove this watcher and all before it */
3094
3095 if (w->wd == wd || wd == -1)
3096 {
3097 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3098 {
3099 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3100 w->wd = -1;
3101 infy_add (EV_A_ w); /* re-add, no matter what */
3102 }
3103
3104 stat_timer_cb (EV_A_ &w->timer, 0);
678 } 3105 }
679 } 3106 }
680 } 3107 }
681} 3108}
682 3109
683static int 3110static void
684time_update_monotonic (void) 3111infy_cb (EV_P_ ev_io *w, int revents)
685{ 3112{
686 now = get_clock (); 3113 char buf [EV_INOTIFY_BUFSIZE];
3114 int ofs;
3115 int len = read (fs_fd, buf, sizeof (buf));
687 3116
688 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 3117 for (ofs = 0; ofs < len; )
3118 {
3119 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3120 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3121 ofs += sizeof (struct inotify_event) + ev->len;
689 { 3122 }
690 ev_now = now + diff; 3123}
3124
3125inline_size void
3126ev_check_2625 (EV_P)
3127{
3128 /* kernels < 2.6.25 are borked
3129 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3130 */
3131 if (ev_linux_version () < 0x020619)
691 return 0; 3132 return;
3133
3134 fs_2625 = 1;
3135}
3136
3137inline_size int
3138infy_newfd (void)
3139{
3140#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3141 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3142 if (fd >= 0)
3143 return fd;
3144#endif
3145 return inotify_init ();
3146}
3147
3148inline_size void
3149infy_init (EV_P)
3150{
3151 if (fs_fd != -2)
3152 return;
3153
3154 fs_fd = -1;
3155
3156 ev_check_2625 (EV_A);
3157
3158 fs_fd = infy_newfd ();
3159
3160 if (fs_fd >= 0)
692 } 3161 {
3162 fd_intern (fs_fd);
3163 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3164 ev_set_priority (&fs_w, EV_MAXPRI);
3165 ev_io_start (EV_A_ &fs_w);
3166 ev_unref (EV_A);
3167 }
3168}
3169
3170inline_size void
3171infy_fork (EV_P)
3172{
3173 int slot;
3174
3175 if (fs_fd < 0)
3176 return;
3177
3178 ev_ref (EV_A);
3179 ev_io_stop (EV_A_ &fs_w);
3180 close (fs_fd);
3181 fs_fd = infy_newfd ();
3182
3183 if (fs_fd >= 0)
3184 {
3185 fd_intern (fs_fd);
3186 ev_io_set (&fs_w, fs_fd, EV_READ);
3187 ev_io_start (EV_A_ &fs_w);
3188 ev_unref (EV_A);
3189 }
3190
3191 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3192 {
3193 WL w_ = fs_hash [slot].head;
3194 fs_hash [slot].head = 0;
3195
3196 while (w_)
3197 {
3198 ev_stat *w = (ev_stat *)w_;
3199 w_ = w_->next; /* lets us add this watcher */
3200
3201 w->wd = -1;
3202
3203 if (fs_fd >= 0)
3204 infy_add (EV_A_ w); /* re-add, no matter what */
3205 else
3206 {
3207 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3208 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3209 ev_timer_again (EV_A_ &w->timer);
3210 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3211 }
3212 }
3213 }
3214}
3215
3216#endif
3217
3218#ifdef _WIN32
3219# define EV_LSTAT(p,b) _stati64 (p, b)
3220#else
3221# define EV_LSTAT(p,b) lstat (p, b)
3222#endif
3223
3224void
3225ev_stat_stat (EV_P_ ev_stat *w)
3226{
3227 if (lstat (w->path, &w->attr) < 0)
3228 w->attr.st_nlink = 0;
3229 else if (!w->attr.st_nlink)
3230 w->attr.st_nlink = 1;
3231}
3232
3233static void noinline
3234stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3235{
3236 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3237
3238 ev_statdata prev = w->attr;
3239 ev_stat_stat (EV_A_ w);
3240
3241 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3242 if (
3243 prev.st_dev != w->attr.st_dev
3244 || prev.st_ino != w->attr.st_ino
3245 || prev.st_mode != w->attr.st_mode
3246 || prev.st_nlink != w->attr.st_nlink
3247 || prev.st_uid != w->attr.st_uid
3248 || prev.st_gid != w->attr.st_gid
3249 || prev.st_rdev != w->attr.st_rdev
3250 || prev.st_size != w->attr.st_size
3251 || prev.st_atime != w->attr.st_atime
3252 || prev.st_mtime != w->attr.st_mtime
3253 || prev.st_ctime != w->attr.st_ctime
3254 ) {
3255 /* we only update w->prev on actual differences */
3256 /* in case we test more often than invoke the callback, */
3257 /* to ensure that prev is always different to attr */
3258 w->prev = prev;
3259
3260 #if EV_USE_INOTIFY
3261 if (fs_fd >= 0)
3262 {
3263 infy_del (EV_A_ w);
3264 infy_add (EV_A_ w);
3265 ev_stat_stat (EV_A_ w); /* avoid race... */
3266 }
3267 #endif
3268
3269 ev_feed_event (EV_A_ w, EV_STAT);
3270 }
3271}
3272
3273void
3274ev_stat_start (EV_P_ ev_stat *w)
3275{
3276 if (expect_false (ev_is_active (w)))
3277 return;
3278
3279 ev_stat_stat (EV_A_ w);
3280
3281 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3282 w->interval = MIN_STAT_INTERVAL;
3283
3284 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3285 ev_set_priority (&w->timer, ev_priority (w));
3286
3287#if EV_USE_INOTIFY
3288 infy_init (EV_A);
3289
3290 if (fs_fd >= 0)
3291 infy_add (EV_A_ w);
693 else 3292 else
3293#endif
3294 {
3295 ev_timer_again (EV_A_ &w->timer);
3296 ev_unref (EV_A);
694 { 3297 }
695 now_floor = now; 3298
696 ev_now = ev_time (); 3299 ev_start (EV_A_ (W)w, 1);
3300
3301 EV_FREQUENT_CHECK;
3302}
3303
3304void
3305ev_stat_stop (EV_P_ ev_stat *w)
3306{
3307 clear_pending (EV_A_ (W)w);
3308 if (expect_false (!ev_is_active (w)))
697 return 1; 3309 return;
3310
3311 EV_FREQUENT_CHECK;
3312
3313#if EV_USE_INOTIFY
3314 infy_del (EV_A_ w);
3315#endif
3316
3317 if (ev_is_active (&w->timer))
698 } 3318 {
3319 ev_ref (EV_A);
3320 ev_timer_stop (EV_A_ &w->timer);
3321 }
3322
3323 ev_stop (EV_A_ (W)w);
3324
3325 EV_FREQUENT_CHECK;
3326}
3327#endif
3328
3329#if EV_IDLE_ENABLE
3330void
3331ev_idle_start (EV_P_ ev_idle *w)
3332{
3333 if (expect_false (ev_is_active (w)))
3334 return;
3335
3336 pri_adjust (EV_A_ (W)w);
3337
3338 EV_FREQUENT_CHECK;
3339
3340 {
3341 int active = ++idlecnt [ABSPRI (w)];
3342
3343 ++idleall;
3344 ev_start (EV_A_ (W)w, active);
3345
3346 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3347 idles [ABSPRI (w)][active - 1] = w;
3348 }
3349
3350 EV_FREQUENT_CHECK;
3351}
3352
3353void
3354ev_idle_stop (EV_P_ ev_idle *w)
3355{
3356 clear_pending (EV_A_ (W)w);
3357 if (expect_false (!ev_is_active (w)))
3358 return;
3359
3360 EV_FREQUENT_CHECK;
3361
3362 {
3363 int active = ev_active (w);
3364
3365 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3366 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3367
3368 ev_stop (EV_A_ (W)w);
3369 --idleall;
3370 }
3371
3372 EV_FREQUENT_CHECK;
3373}
3374#endif
3375
3376#if EV_PREPARE_ENABLE
3377void
3378ev_prepare_start (EV_P_ ev_prepare *w)
3379{
3380 if (expect_false (ev_is_active (w)))
3381 return;
3382
3383 EV_FREQUENT_CHECK;
3384
3385 ev_start (EV_A_ (W)w, ++preparecnt);
3386 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3387 prepares [preparecnt - 1] = w;
3388
3389 EV_FREQUENT_CHECK;
3390}
3391
3392void
3393ev_prepare_stop (EV_P_ ev_prepare *w)
3394{
3395 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w)))
3397 return;
3398
3399 EV_FREQUENT_CHECK;
3400
3401 {
3402 int active = ev_active (w);
3403
3404 prepares [active - 1] = prepares [--preparecnt];
3405 ev_active (prepares [active - 1]) = active;
3406 }
3407
3408 ev_stop (EV_A_ (W)w);
3409
3410 EV_FREQUENT_CHECK;
3411}
3412#endif
3413
3414#if EV_CHECK_ENABLE
3415void
3416ev_check_start (EV_P_ ev_check *w)
3417{
3418 if (expect_false (ev_is_active (w)))
3419 return;
3420
3421 EV_FREQUENT_CHECK;
3422
3423 ev_start (EV_A_ (W)w, ++checkcnt);
3424 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3425 checks [checkcnt - 1] = w;
3426
3427 EV_FREQUENT_CHECK;
3428}
3429
3430void
3431ev_check_stop (EV_P_ ev_check *w)
3432{
3433 clear_pending (EV_A_ (W)w);
3434 if (expect_false (!ev_is_active (w)))
3435 return;
3436
3437 EV_FREQUENT_CHECK;
3438
3439 {
3440 int active = ev_active (w);
3441
3442 checks [active - 1] = checks [--checkcnt];
3443 ev_active (checks [active - 1]) = active;
3444 }
3445
3446 ev_stop (EV_A_ (W)w);
3447
3448 EV_FREQUENT_CHECK;
3449}
3450#endif
3451
3452#if EV_EMBED_ENABLE
3453void noinline
3454ev_embed_sweep (EV_P_ ev_embed *w)
3455{
3456 ev_run (w->other, EVRUN_NOWAIT);
699} 3457}
700 3458
701static void 3459static void
702time_update (void) 3460embed_io_cb (EV_P_ ev_io *io, int revents)
703{ 3461{
704 int i; 3462 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
705 3463
706#if EV_USE_MONOTONIC 3464 if (ev_cb (w))
707 if (expect_true (have_monotonic)) 3465 ev_feed_event (EV_A_ (W)w, EV_EMBED);
708 {
709 if (time_update_monotonic ())
710 {
711 ev_tstamp odiff = diff;
712
713 for (i = 4; --i; ) /* loop a few times, before making important decisions */
714 {
715 diff = ev_now - now;
716
717 if (fabs (odiff - diff) < MIN_TIMEJUMP)
718 return; /* all is well */
719
720 ev_now = ev_time ();
721 now = get_clock ();
722 now_floor = now;
723 }
724
725 periodics_reschedule (diff - odiff);
726 /* no timer adjustment, as the monotonic clock doesn't jump */
727 }
728 }
729 else 3466 else
730#endif 3467 ev_run (w->other, EVRUN_NOWAIT);
3468}
3469
3470static void
3471embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3472{
3473 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3474
731 { 3475 {
732 ev_now = ev_time (); 3476 EV_P = w->other;
733 3477
734 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 3478 while (fdchangecnt)
735 { 3479 {
736 periodics_reschedule (ev_now - now); 3480 fd_reify (EV_A);
737 3481 ev_run (EV_A_ EVRUN_NOWAIT);
738 /* adjust timers. this is easy, as the offset is the same for all */
739 for (i = 0; i < timercnt; ++i)
740 timers [i]->at += diff;
741 } 3482 }
742
743 now = ev_now;
744 } 3483 }
745} 3484}
746 3485
747int ev_loop_done; 3486static void
748 3487embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
749void ev_loop (int flags)
750{ 3488{
751 double block; 3489 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
752 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
753 3490
754 do 3491 ev_embed_stop (EV_A_ w);
3492
755 { 3493 {
756 /* queue check watchers (and execute them) */ 3494 EV_P = w->other;
757 if (expect_false (preparecnt))
758 {
759 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
760 call_pending ();
761 }
762 3495
763 /* update fd-related kernel structures */ 3496 ev_loop_fork (EV_A);
764 fd_reify (); 3497 ev_run (EV_A_ EVRUN_NOWAIT);
765
766 /* calculate blocking time */
767
768 /* we only need this for !monotonic clockor timers, but as we basically
769 always have timers, we just calculate it always */
770#if EV_USE_MONOTONIC
771 if (expect_true (have_monotonic))
772 time_update_monotonic ();
773 else
774#endif
775 {
776 ev_now = ev_time ();
777 now = ev_now;
778 }
779
780 if (flags & EVLOOP_NONBLOCK || idlecnt)
781 block = 0.;
782 else
783 {
784 block = MAX_BLOCKTIME;
785
786 if (timercnt)
787 {
788 ev_tstamp to = timers [0]->at - now + method_fudge;
789 if (block > to) block = to;
790 }
791
792 if (periodiccnt)
793 {
794 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
795 if (block > to) block = to;
796 }
797
798 if (block < 0.) block = 0.;
799 }
800
801 method_poll (block);
802
803 /* update ev_now, do magic */
804 time_update ();
805
806 /* queue pending timers and reschedule them */
807 timers_reify (); /* relative timers called last */
808 periodics_reify (); /* absolute timers called first */
809
810 /* queue idle watchers unless io or timers are pending */
811 if (!pendingcnt)
812 queue_events ((W *)idles, idlecnt, EV_IDLE);
813
814 /* queue check watchers, to be executed first */
815 if (checkcnt)
816 queue_events ((W *)checks, checkcnt, EV_CHECK);
817
818 call_pending ();
819 } 3498 }
820 while (!ev_loop_done);
821 3499
822 if (ev_loop_done != 2) 3500 ev_embed_start (EV_A_ w);
823 ev_loop_done = 0;
824} 3501}
3502
3503#if 0
3504static void
3505embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3506{
3507 ev_idle_stop (EV_A_ idle);
3508}
3509#endif
3510
3511void
3512ev_embed_start (EV_P_ ev_embed *w)
3513{
3514 if (expect_false (ev_is_active (w)))
3515 return;
3516
3517 {
3518 EV_P = w->other;
3519 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3520 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3521 }
3522
3523 EV_FREQUENT_CHECK;
3524
3525 ev_set_priority (&w->io, ev_priority (w));
3526 ev_io_start (EV_A_ &w->io);
3527
3528 ev_prepare_init (&w->prepare, embed_prepare_cb);
3529 ev_set_priority (&w->prepare, EV_MINPRI);
3530 ev_prepare_start (EV_A_ &w->prepare);
3531
3532 ev_fork_init (&w->fork, embed_fork_cb);
3533 ev_fork_start (EV_A_ &w->fork);
3534
3535 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3536
3537 ev_start (EV_A_ (W)w, 1);
3538
3539 EV_FREQUENT_CHECK;
3540}
3541
3542void
3543ev_embed_stop (EV_P_ ev_embed *w)
3544{
3545 clear_pending (EV_A_ (W)w);
3546 if (expect_false (!ev_is_active (w)))
3547 return;
3548
3549 EV_FREQUENT_CHECK;
3550
3551 ev_io_stop (EV_A_ &w->io);
3552 ev_prepare_stop (EV_A_ &w->prepare);
3553 ev_fork_stop (EV_A_ &w->fork);
3554
3555 ev_stop (EV_A_ (W)w);
3556
3557 EV_FREQUENT_CHECK;
3558}
3559#endif
3560
3561#if EV_FORK_ENABLE
3562void
3563ev_fork_start (EV_P_ ev_fork *w)
3564{
3565 if (expect_false (ev_is_active (w)))
3566 return;
3567
3568 EV_FREQUENT_CHECK;
3569
3570 ev_start (EV_A_ (W)w, ++forkcnt);
3571 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3572 forks [forkcnt - 1] = w;
3573
3574 EV_FREQUENT_CHECK;
3575}
3576
3577void
3578ev_fork_stop (EV_P_ ev_fork *w)
3579{
3580 clear_pending (EV_A_ (W)w);
3581 if (expect_false (!ev_is_active (w)))
3582 return;
3583
3584 EV_FREQUENT_CHECK;
3585
3586 {
3587 int active = ev_active (w);
3588
3589 forks [active - 1] = forks [--forkcnt];
3590 ev_active (forks [active - 1]) = active;
3591 }
3592
3593 ev_stop (EV_A_ (W)w);
3594
3595 EV_FREQUENT_CHECK;
3596}
3597#endif
3598
3599#if EV_CLEANUP_ENABLE
3600void
3601ev_cleanup_start (EV_P_ ev_cleanup *w)
3602{
3603 if (expect_false (ev_is_active (w)))
3604 return;
3605
3606 EV_FREQUENT_CHECK;
3607
3608 ev_start (EV_A_ (W)w, ++cleanupcnt);
3609 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3610 cleanups [cleanupcnt - 1] = w;
3611
3612 /* cleanup watchers should never keep a refcount on the loop */
3613 ev_unref (EV_A);
3614 EV_FREQUENT_CHECK;
3615}
3616
3617void
3618ev_cleanup_stop (EV_P_ ev_cleanup *w)
3619{
3620 clear_pending (EV_A_ (W)w);
3621 if (expect_false (!ev_is_active (w)))
3622 return;
3623
3624 EV_FREQUENT_CHECK;
3625 ev_ref (EV_A);
3626
3627 {
3628 int active = ev_active (w);
3629
3630 cleanups [active - 1] = cleanups [--cleanupcnt];
3631 ev_active (cleanups [active - 1]) = active;
3632 }
3633
3634 ev_stop (EV_A_ (W)w);
3635
3636 EV_FREQUENT_CHECK;
3637}
3638#endif
3639
3640#if EV_ASYNC_ENABLE
3641void
3642ev_async_start (EV_P_ ev_async *w)
3643{
3644 if (expect_false (ev_is_active (w)))
3645 return;
3646
3647 w->sent = 0;
3648
3649 evpipe_init (EV_A);
3650
3651 EV_FREQUENT_CHECK;
3652
3653 ev_start (EV_A_ (W)w, ++asynccnt);
3654 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3655 asyncs [asynccnt - 1] = w;
3656
3657 EV_FREQUENT_CHECK;
3658}
3659
3660void
3661ev_async_stop (EV_P_ ev_async *w)
3662{
3663 clear_pending (EV_A_ (W)w);
3664 if (expect_false (!ev_is_active (w)))
3665 return;
3666
3667 EV_FREQUENT_CHECK;
3668
3669 {
3670 int active = ev_active (w);
3671
3672 asyncs [active - 1] = asyncs [--asynccnt];
3673 ev_active (asyncs [active - 1]) = active;
3674 }
3675
3676 ev_stop (EV_A_ (W)w);
3677
3678 EV_FREQUENT_CHECK;
3679}
3680
3681void
3682ev_async_send (EV_P_ ev_async *w)
3683{
3684 w->sent = 1;
3685 evpipe_write (EV_A_ &async_pending);
3686}
3687#endif
825 3688
826/*****************************************************************************/ 3689/*****************************************************************************/
827 3690
828static void
829wlist_add (WL *head, WL elem)
830{
831 elem->next = *head;
832 *head = elem;
833}
834
835static void
836wlist_del (WL *head, WL elem)
837{
838 while (*head)
839 {
840 if (*head == elem)
841 {
842 *head = elem->next;
843 return;
844 }
845
846 head = &(*head)->next;
847 }
848}
849
850static void
851ev_clear_pending (W w)
852{
853 if (w->pending)
854 {
855 pendings [ABSPRI (w)][w->pending - 1].w = 0;
856 w->pending = 0;
857 }
858}
859
860static void
861ev_start (W w, int active)
862{
863 w->active = active;
864}
865
866static void
867ev_stop (W w)
868{
869 w->active = 0;
870}
871
872/*****************************************************************************/
873
874void
875ev_io_start (struct ev_io *w)
876{
877 int fd = w->fd;
878
879 if (ev_is_active (w))
880 return;
881
882 assert (("ev_io_start called with negative fd", fd >= 0));
883
884 ev_start ((W)w, 1);
885 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
886 wlist_add ((WL *)&anfds[fd].head, (WL)w);
887
888 fd_change (fd);
889}
890
891void
892ev_io_stop (struct ev_io *w)
893{
894 ev_clear_pending ((W)w);
895 if (!ev_is_active (w))
896 return;
897
898 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
899 ev_stop ((W)w);
900
901 fd_change (w->fd);
902}
903
904void
905ev_timer_start (struct ev_timer *w)
906{
907 if (ev_is_active (w))
908 return;
909
910 w->at += now;
911
912 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
913
914 ev_start ((W)w, ++timercnt);
915 array_needsize (timers, timermax, timercnt, );
916 timers [timercnt - 1] = w;
917 upheap ((WT *)timers, timercnt - 1);
918}
919
920void
921ev_timer_stop (struct ev_timer *w)
922{
923 ev_clear_pending ((W)w);
924 if (!ev_is_active (w))
925 return;
926
927 if (w->active < timercnt--)
928 {
929 timers [w->active - 1] = timers [timercnt];
930 downheap ((WT *)timers, timercnt, w->active - 1);
931 }
932
933 w->at = w->repeat;
934
935 ev_stop ((W)w);
936}
937
938void
939ev_timer_again (struct ev_timer *w)
940{
941 if (ev_is_active (w))
942 {
943 if (w->repeat)
944 {
945 w->at = now + w->repeat;
946 downheap ((WT *)timers, timercnt, w->active - 1);
947 }
948 else
949 ev_timer_stop (w);
950 }
951 else if (w->repeat)
952 ev_timer_start (w);
953}
954
955void
956ev_periodic_start (struct ev_periodic *w)
957{
958 if (ev_is_active (w))
959 return;
960
961 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
962
963 /* this formula differs from the one in periodic_reify because we do not always round up */
964 if (w->interval)
965 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
966
967 ev_start ((W)w, ++periodiccnt);
968 array_needsize (periodics, periodicmax, periodiccnt, );
969 periodics [periodiccnt - 1] = w;
970 upheap ((WT *)periodics, periodiccnt - 1);
971}
972
973void
974ev_periodic_stop (struct ev_periodic *w)
975{
976 ev_clear_pending ((W)w);
977 if (!ev_is_active (w))
978 return;
979
980 if (w->active < periodiccnt--)
981 {
982 periodics [w->active - 1] = periodics [periodiccnt];
983 downheap ((WT *)periodics, periodiccnt, w->active - 1);
984 }
985
986 ev_stop ((W)w);
987}
988
989void
990ev_signal_start (struct ev_signal *w)
991{
992 if (ev_is_active (w))
993 return;
994
995 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
996
997 ev_start ((W)w, 1);
998 array_needsize (signals, signalmax, w->signum, signals_init);
999 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1000
1001 if (!w->next)
1002 {
1003 struct sigaction sa;
1004 sa.sa_handler = sighandler;
1005 sigfillset (&sa.sa_mask);
1006 sa.sa_flags = 0;
1007 sigaction (w->signum, &sa, 0);
1008 }
1009}
1010
1011void
1012ev_signal_stop (struct ev_signal *w)
1013{
1014 ev_clear_pending ((W)w);
1015 if (!ev_is_active (w))
1016 return;
1017
1018 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1019 ev_stop ((W)w);
1020
1021 if (!signals [w->signum - 1].head)
1022 signal (w->signum, SIG_DFL);
1023}
1024
1025void
1026ev_idle_start (struct ev_idle *w)
1027{
1028 if (ev_is_active (w))
1029 return;
1030
1031 ev_start ((W)w, ++idlecnt);
1032 array_needsize (idles, idlemax, idlecnt, );
1033 idles [idlecnt - 1] = w;
1034}
1035
1036void
1037ev_idle_stop (struct ev_idle *w)
1038{
1039 ev_clear_pending ((W)w);
1040 if (ev_is_active (w))
1041 return;
1042
1043 idles [w->active - 1] = idles [--idlecnt];
1044 ev_stop ((W)w);
1045}
1046
1047void
1048ev_prepare_start (struct ev_prepare *w)
1049{
1050 if (ev_is_active (w))
1051 return;
1052
1053 ev_start ((W)w, ++preparecnt);
1054 array_needsize (prepares, preparemax, preparecnt, );
1055 prepares [preparecnt - 1] = w;
1056}
1057
1058void
1059ev_prepare_stop (struct ev_prepare *w)
1060{
1061 ev_clear_pending ((W)w);
1062 if (ev_is_active (w))
1063 return;
1064
1065 prepares [w->active - 1] = prepares [--preparecnt];
1066 ev_stop ((W)w);
1067}
1068
1069void
1070ev_check_start (struct ev_check *w)
1071{
1072 if (ev_is_active (w))
1073 return;
1074
1075 ev_start ((W)w, ++checkcnt);
1076 array_needsize (checks, checkmax, checkcnt, );
1077 checks [checkcnt - 1] = w;
1078}
1079
1080void
1081ev_check_stop (struct ev_check *w)
1082{
1083 ev_clear_pending ((W)w);
1084 if (ev_is_active (w))
1085 return;
1086
1087 checks [w->active - 1] = checks [--checkcnt];
1088 ev_stop ((W)w);
1089}
1090
1091void
1092ev_child_start (struct ev_child *w)
1093{
1094 if (ev_is_active (w))
1095 return;
1096
1097 ev_start ((W)w, 1);
1098 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1099}
1100
1101void
1102ev_child_stop (struct ev_child *w)
1103{
1104 ev_clear_pending ((W)w);
1105 if (ev_is_active (w))
1106 return;
1107
1108 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1109 ev_stop ((W)w);
1110}
1111
1112/*****************************************************************************/
1113
1114struct ev_once 3691struct ev_once
1115{ 3692{
1116 struct ev_io io; 3693 ev_io io;
1117 struct ev_timer to; 3694 ev_timer to;
1118 void (*cb)(int revents, void *arg); 3695 void (*cb)(int revents, void *arg);
1119 void *arg; 3696 void *arg;
1120}; 3697};
1121 3698
1122static void 3699static void
1123once_cb (struct ev_once *once, int revents) 3700once_cb (EV_P_ struct ev_once *once, int revents)
1124{ 3701{
1125 void (*cb)(int revents, void *arg) = once->cb; 3702 void (*cb)(int revents, void *arg) = once->cb;
1126 void *arg = once->arg; 3703 void *arg = once->arg;
1127 3704
1128 ev_io_stop (&once->io); 3705 ev_io_stop (EV_A_ &once->io);
1129 ev_timer_stop (&once->to); 3706 ev_timer_stop (EV_A_ &once->to);
1130 free (once); 3707 ev_free (once);
1131 3708
1132 cb (revents, arg); 3709 cb (revents, arg);
1133} 3710}
1134 3711
1135static void 3712static void
1136once_cb_io (struct ev_io *w, int revents) 3713once_cb_io (EV_P_ ev_io *w, int revents)
1137{ 3714{
1138 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3715 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3716
3717 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1139} 3718}
1140 3719
1141static void 3720static void
1142once_cb_to (struct ev_timer *w, int revents) 3721once_cb_to (EV_P_ ev_timer *w, int revents)
1143{ 3722{
1144 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3723 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1145}
1146 3724
3725 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3726}
3727
1147void 3728void
1148ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3729ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1149{ 3730{
1150 struct ev_once *once = malloc (sizeof (struct ev_once)); 3731 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1151 3732
1152 if (!once) 3733 if (expect_false (!once))
3734 {
1153 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3735 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1154 else 3736 return;
1155 { 3737 }
3738
1156 once->cb = cb; 3739 once->cb = cb;
1157 once->arg = arg; 3740 once->arg = arg;
1158 3741
1159 ev_watcher_init (&once->io, once_cb_io); 3742 ev_init (&once->io, once_cb_io);
1160 if (fd >= 0) 3743 if (fd >= 0)
3744 {
3745 ev_io_set (&once->io, fd, events);
3746 ev_io_start (EV_A_ &once->io);
3747 }
3748
3749 ev_init (&once->to, once_cb_to);
3750 if (timeout >= 0.)
3751 {
3752 ev_timer_set (&once->to, timeout, 0.);
3753 ev_timer_start (EV_A_ &once->to);
3754 }
3755}
3756
3757/*****************************************************************************/
3758
3759#if EV_WALK_ENABLE
3760void
3761ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3762{
3763 int i, j;
3764 ev_watcher_list *wl, *wn;
3765
3766 if (types & (EV_IO | EV_EMBED))
3767 for (i = 0; i < anfdmax; ++i)
3768 for (wl = anfds [i].head; wl; )
1161 { 3769 {
1162 ev_io_set (&once->io, fd, events); 3770 wn = wl->next;
1163 ev_io_start (&once->io); 3771
3772#if EV_EMBED_ENABLE
3773 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3774 {
3775 if (types & EV_EMBED)
3776 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3777 }
3778 else
3779#endif
3780#if EV_USE_INOTIFY
3781 if (ev_cb ((ev_io *)wl) == infy_cb)
3782 ;
3783 else
3784#endif
3785 if ((ev_io *)wl != &pipe_w)
3786 if (types & EV_IO)
3787 cb (EV_A_ EV_IO, wl);
3788
3789 wl = wn;
1164 } 3790 }
1165 3791
1166 ev_watcher_init (&once->to, once_cb_to); 3792 if (types & (EV_TIMER | EV_STAT))
1167 if (timeout >= 0.) 3793 for (i = timercnt + HEAP0; i-- > HEAP0; )
3794#if EV_STAT_ENABLE
3795 /*TODO: timer is not always active*/
3796 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1168 { 3797 {
1169 ev_timer_set (&once->to, timeout, 0.); 3798 if (types & EV_STAT)
1170 ev_timer_start (&once->to); 3799 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1171 } 3800 }
1172 } 3801 else
1173} 3802#endif
3803 if (types & EV_TIMER)
3804 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1174 3805
1175/*****************************************************************************/ 3806#if EV_PERIODIC_ENABLE
3807 if (types & EV_PERIODIC)
3808 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3809 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3810#endif
1176 3811
1177#if 0 3812#if EV_IDLE_ENABLE
3813 if (types & EV_IDLE)
3814 for (j = NUMPRI; i--; )
3815 for (i = idlecnt [j]; i--; )
3816 cb (EV_A_ EV_IDLE, idles [j][i]);
3817#endif
1178 3818
1179struct ev_io wio; 3819#if EV_FORK_ENABLE
3820 if (types & EV_FORK)
3821 for (i = forkcnt; i--; )
3822 if (ev_cb (forks [i]) != embed_fork_cb)
3823 cb (EV_A_ EV_FORK, forks [i]);
3824#endif
1180 3825
1181static void 3826#if EV_ASYNC_ENABLE
1182sin_cb (struct ev_io *w, int revents) 3827 if (types & EV_ASYNC)
1183{ 3828 for (i = asynccnt; i--; )
1184 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3829 cb (EV_A_ EV_ASYNC, asyncs [i]);
1185} 3830#endif
1186 3831
1187static void 3832#if EV_PREPARE_ENABLE
1188ocb (struct ev_timer *w, int revents) 3833 if (types & EV_PREPARE)
1189{ 3834 for (i = preparecnt; i--; )
1190 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3835# if EV_EMBED_ENABLE
1191 ev_timer_stop (w); 3836 if (ev_cb (prepares [i]) != embed_prepare_cb)
1192 ev_timer_start (w);
1193}
1194
1195static void
1196scb (struct ev_signal *w, int revents)
1197{
1198 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1199 ev_io_stop (&wio);
1200 ev_io_start (&wio);
1201}
1202
1203static void
1204gcb (struct ev_signal *w, int revents)
1205{
1206 fprintf (stderr, "generic %x\n", revents);
1207
1208}
1209
1210int main (void)
1211{
1212 ev_init (0);
1213
1214 ev_io_init (&wio, sin_cb, 0, EV_READ);
1215 ev_io_start (&wio);
1216
1217 struct ev_timer t[10000];
1218
1219#if 0
1220 int i;
1221 for (i = 0; i < 10000; ++i)
1222 {
1223 struct ev_timer *w = t + i;
1224 ev_watcher_init (w, ocb, i);
1225 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1226 ev_timer_start (w);
1227 if (drand48 () < 0.5)
1228 ev_timer_stop (w);
1229 }
1230#endif 3837# endif
1231 3838 cb (EV_A_ EV_PREPARE, prepares [i]);
1232 struct ev_timer t1;
1233 ev_timer_init (&t1, ocb, 5, 10);
1234 ev_timer_start (&t1);
1235
1236 struct ev_signal sig;
1237 ev_signal_init (&sig, scb, SIGQUIT);
1238 ev_signal_start (&sig);
1239
1240 struct ev_check cw;
1241 ev_check_init (&cw, gcb);
1242 ev_check_start (&cw);
1243
1244 struct ev_idle iw;
1245 ev_idle_init (&iw, gcb);
1246 ev_idle_start (&iw);
1247
1248 ev_loop (0);
1249
1250 return 0;
1251}
1252
1253#endif 3839#endif
1254 3840
3841#if EV_CHECK_ENABLE
3842 if (types & EV_CHECK)
3843 for (i = checkcnt; i--; )
3844 cb (EV_A_ EV_CHECK, checks [i]);
3845#endif
1255 3846
3847#if EV_SIGNAL_ENABLE
3848 if (types & EV_SIGNAL)
3849 for (i = 0; i < EV_NSIG - 1; ++i)
3850 for (wl = signals [i].head; wl; )
3851 {
3852 wn = wl->next;
3853 cb (EV_A_ EV_SIGNAL, wl);
3854 wl = wn;
3855 }
3856#endif
1256 3857
3858#if EV_CHILD_ENABLE
3859 if (types & EV_CHILD)
3860 for (i = (EV_PID_HASHSIZE); i--; )
3861 for (wl = childs [i]; wl; )
3862 {
3863 wn = wl->next;
3864 cb (EV_A_ EV_CHILD, wl);
3865 wl = wn;
3866 }
3867#endif
3868/* EV_STAT 0x00001000 /* stat data changed */
3869/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3870}
3871#endif
1257 3872
3873#if EV_MULTIPLICITY
3874 #include "ev_wrap.h"
3875#endif
3876
3877EV_CPP(})
3878

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