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Comparing libev/ev.c (file contents):
Revision 1.82 by root, Fri Nov 9 20:55:09 2007 UTC vs.
Revision 1.360 by root, Sun Oct 24 18:12:41 2010 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
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
33 61
34# if HAVE_CLOCK_GETTIME 62# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 64# define EV_USE_MONOTONIC 1
65# endif
66# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 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
37# endif 76# endif
38 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
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 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
40# define EV_USE_SELECT 1 93# define EV_USE_SELECT 0
41# endif 94# endif
42 95
43# if HAVE_POLL && HAVE_POLL_H 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
44# define EV_USE_POLL 1 102# define EV_USE_POLL 0
45# endif 103# endif
46 104
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 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
48# define EV_USE_EPOLL 1 111# define EV_USE_EPOLL 0
49# endif 112# endif
50 113
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 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
52# define EV_USE_KQUEUE 1 120# define EV_USE_KQUEUE 0
53# endif 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
54 131
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
55#endif 159#endif
56 160
57#include <math.h> 161#include <math.h>
58#include <stdlib.h> 162#include <stdlib.h>
163#include <string.h>
59#include <fcntl.h> 164#include <fcntl.h>
60#include <stddef.h> 165#include <stddef.h>
61 166
62#include <stdio.h> 167#include <stdio.h>
63 168
64#include <assert.h> 169#include <assert.h>
65#include <errno.h> 170#include <errno.h>
66#include <sys/types.h> 171#include <sys/types.h>
67#include <time.h> 172#include <time.h>
173#include <limits.h>
68 174
69#include <signal.h> 175#include <signal.h>
70
71#ifndef WIN32
72# include <unistd.h>
73# include <sys/time.h>
74# include <sys/wait.h>
75#endif
76/**/
77
78#ifndef EV_USE_MONOTONIC
79# define EV_USE_MONOTONIC 1
80#endif
81
82#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1
84#endif
85
86#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
88#endif
89
90#ifndef EV_USE_EPOLL
91# define EV_USE_EPOLL 0
92#endif
93
94#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0
96#endif
97
98#ifndef EV_USE_WIN32
99# ifdef WIN32
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else
104# define EV_USE_WIN32 0
105# endif
106#endif
107
108#ifndef EV_USE_REALTIME
109# define EV_USE_REALTIME 1
110#endif
111
112/**/
113
114#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0
117#endif
118
119#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0
122#endif
123
124/**/
125
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
130 176
131#ifdef EV_H 177#ifdef EV_H
132# include EV_H 178# include EV_H
133#else 179#else
134# include "ev.h" 180# include "ev.h"
135#endif 181#endif
136 182
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
244
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
249# define EV_USE_MONOTONIC 0
250# endif
251#endif
252
253#ifndef EV_USE_REALTIME
254# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
255#endif
256
257#ifndef EV_USE_NANOSLEEP
258# if _POSIX_C_SOURCE >= 199309L
259# define EV_USE_NANOSLEEP EV_FEATURE_OS
260# else
261# define EV_USE_NANOSLEEP 0
262# endif
263#endif
264
265#ifndef EV_USE_SELECT
266# define EV_USE_SELECT EV_FEATURE_BACKENDS
267#endif
268
269#ifndef EV_USE_POLL
270# ifdef _WIN32
271# define EV_USE_POLL 0
272# else
273# define EV_USE_POLL EV_FEATURE_BACKENDS
274# endif
275#endif
276
277#ifndef EV_USE_EPOLL
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_EPOLL EV_FEATURE_BACKENDS
280# else
281# define EV_USE_EPOLL 0
282# endif
283#endif
284
285#ifndef EV_USE_KQUEUE
286# define EV_USE_KQUEUE 0
287#endif
288
289#ifndef EV_USE_PORT
290# define EV_USE_PORT 0
291#endif
292
293#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS
296# else
297# define EV_USE_INOTIFY 0
298# endif
299#endif
300
301#ifndef EV_PID_HASHSIZE
302# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
303#endif
304
305#ifndef EV_INOTIFY_HASHSIZE
306# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
307#endif
308
309#ifndef EV_USE_EVENTFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_EVENTFD EV_FEATURE_OS
312# else
313# define EV_USE_EVENTFD 0
314# endif
315#endif
316
317#ifndef EV_USE_SIGNALFD
318# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
319# define EV_USE_SIGNALFD EV_FEATURE_OS
320# else
321# define EV_USE_SIGNALFD 0
322# endif
323#endif
324
325#if 0 /* debugging */
326# define EV_VERIFY 3
327# define EV_USE_4HEAP 1
328# define EV_HEAP_CACHE_AT 1
329#endif
330
331#ifndef EV_VERIFY
332# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
333#endif
334
335#ifndef EV_USE_4HEAP
336# define EV_USE_4HEAP EV_FEATURE_DATA
337#endif
338
339#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif
342
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h>
347# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC
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
364
365#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0
368#endif
369
370#ifndef CLOCK_REALTIME
371# undef EV_USE_REALTIME
372# define EV_USE_REALTIME 0
373#endif
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
438/**/
439
440#if EV_VERIFY >= 3
441# define EV_FREQUENT_CHECK ev_verify (EV_A)
442#else
443# define EV_FREQUENT_CHECK do { } while (0)
444#endif
445
446/*
447 * This is used to avoid floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */
454#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
455
456#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
458
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)
461
137#if __GNUC__ >= 3 462#if __GNUC__ >= 4
138# define expect(expr,value) __builtin_expect ((expr),(value)) 463# define expect(expr,value) __builtin_expect ((expr),(value))
139# define inline inline 464# define noinline __attribute__ ((noinline))
140#else 465#else
141# define expect(expr,value) (expr) 466# define expect(expr,value) (expr)
142# define inline static 467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif
143#endif 471#endif
144 472
145#define expect_false(expr) expect ((expr) != 0, 0) 473#define expect_false(expr) expect ((expr) != 0, 0)
146#define expect_true(expr) expect ((expr) != 0, 1) 474#define expect_true(expr) expect ((expr) != 0, 1)
475#define inline_size static inline
147 476
477#if EV_FEATURE_CODE
478# define inline_speed static inline
479#else
480# define inline_speed static noinline
481#endif
482
148#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
149#define ABSPRI(w) ((w)->priority - EV_MINPRI) 488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif
150 490
491#define EMPTY /* required for microsofts broken pseudo-c compiler */
492#define EMPTY2(a,b) /* used to suppress some warnings */
493
151typedef struct ev_watcher *W; 494typedef ev_watcher *W;
152typedef struct ev_watcher_list *WL; 495typedef ev_watcher_list *WL;
153typedef struct ev_watcher_time *WT; 496typedef ev_watcher_time *WT;
154 497
498#define ev_active(w) ((W)(w))->active
499#define ev_at(w) ((WT)(w))->at
500
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
506
507#if EV_USE_MONOTONIC
155static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
509#endif
156 510
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
157#include "ev_win32.c" 522# include "ev_win32.c"
523#endif
158 524
159/*****************************************************************************/ 525/*****************************************************************************/
160 526
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
161static void (*syserr_cb)(const char *msg); 577static void (*syserr_cb)(const char *msg);
162 578
579void
163void ev_set_syserr_cb (void (*cb)(const char *msg)) 580ev_set_syserr_cb (void (*cb)(const char *msg))
164{ 581{
165 syserr_cb = cb; 582 syserr_cb = cb;
166} 583}
167 584
168static void 585static void noinline
169syserr (const char *msg) 586ev_syserr (const char *msg)
170{ 587{
171 if (!msg) 588 if (!msg)
172 msg = "(libev) system error"; 589 msg = "(libev) system error";
173 590
174 if (syserr_cb) 591 if (syserr_cb)
175 syserr_cb (msg); 592 syserr_cb (msg);
176 else 593 else
177 { 594 {
595#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg);
599 ev_printerr (": ");
600 ev_printerr (err);
601 ev_printerr ("\n");
602#else
178 perror (msg); 603 perror (msg);
604#endif
179 abort (); 605 abort ();
180 } 606 }
181} 607}
182 608
609static void *
610ev_realloc_emul (void *ptr, long size)
611{
612#if __GLIBC__
613 return realloc (ptr, size);
614#else
615 /* some systems, notably openbsd and darwin, fail to properly
616 * implement realloc (x, 0) (as required by both ansi c-89 and
617 * the single unix specification, so work around them here.
618 */
619
620 if (size)
621 return realloc (ptr, size);
622
623 free (ptr);
624 return 0;
625#endif
626}
627
183static void *(*alloc)(void *ptr, long size); 628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
184 629
630void
185void ev_set_allocator (void *(*cb)(void *ptr, long size)) 631ev_set_allocator (void *(*cb)(void *ptr, long size))
186{ 632{
187 alloc = cb; 633 alloc = cb;
188} 634}
189 635
190static void * 636inline_speed void *
191ev_realloc (void *ptr, long size) 637ev_realloc (void *ptr, long size)
192{ 638{
193 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 639 ptr = alloc (ptr, size);
194 640
195 if (!ptr && size) 641 if (!ptr && size)
196 { 642 {
643#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n");
645#else
197 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
647#endif
198 abort (); 648 abort ();
199 } 649 }
200 650
201 return ptr; 651 return ptr;
202} 652}
… …
204#define ev_malloc(size) ev_realloc (0, (size)) 654#define ev_malloc(size) ev_realloc (0, (size))
205#define ev_free(ptr) ev_realloc ((ptr), 0) 655#define ev_free(ptr) ev_realloc ((ptr), 0)
206 656
207/*****************************************************************************/ 657/*****************************************************************************/
208 658
659/* set in reify when reification needed */
660#define EV_ANFD_REIFY 1
661
662/* file descriptor info structure */
209typedef struct 663typedef struct
210{ 664{
211 WL head; 665 WL head;
212 unsigned char events; 666 unsigned char events; /* the events watched for */
667 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
668 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
213 unsigned char reify; 669 unsigned char unused;
670#if EV_USE_EPOLL
671 unsigned int egen; /* generation counter to counter epoll bugs */
672#endif
673#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
674 SOCKET handle;
675#endif
676#if EV_USE_IOCP
677 OVERLAPPED or, ow;
678#endif
214} ANFD; 679} ANFD;
215 680
681/* stores the pending event set for a given watcher */
216typedef struct 682typedef struct
217{ 683{
218 W w; 684 W w;
219 int events; 685 int events; /* the pending event set for the given watcher */
220} ANPENDING; 686} ANPENDING;
687
688#if EV_USE_INOTIFY
689/* hash table entry per inotify-id */
690typedef struct
691{
692 WL head;
693} ANFS;
694#endif
695
696/* Heap Entry */
697#if EV_HEAP_CACHE_AT
698 /* a heap element */
699 typedef struct {
700 ev_tstamp at;
701 WT w;
702 } ANHE;
703
704 #define ANHE_w(he) (he).w /* access watcher, read-write */
705 #define ANHE_at(he) (he).at /* access cached at, read-only */
706 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
707#else
708 /* a heap element */
709 typedef WT ANHE;
710
711 #define ANHE_w(he) (he)
712 #define ANHE_at(he) (he)->at
713 #define ANHE_at_cache(he)
714#endif
221 715
222#if EV_MULTIPLICITY 716#if EV_MULTIPLICITY
223 717
224 struct ev_loop 718 struct ev_loop
225 { 719 {
720 ev_tstamp ev_rt_now;
721 #define ev_rt_now ((loop)->ev_rt_now)
226 #define VAR(name,decl) decl; 722 #define VAR(name,decl) decl;
227 #include "ev_vars.h" 723 #include "ev_vars.h"
228 #undef VAR 724 #undef VAR
229 }; 725 };
230 #include "ev_wrap.h" 726 #include "ev_wrap.h"
231 727
232 struct ev_loop default_loop_struct; 728 static struct ev_loop default_loop_struct;
233 static struct ev_loop *default_loop; 729 struct ev_loop *ev_default_loop_ptr;
234 730
235#else 731#else
236 732
733 ev_tstamp ev_rt_now;
237 #define VAR(name,decl) static decl; 734 #define VAR(name,decl) static decl;
238 #include "ev_vars.h" 735 #include "ev_vars.h"
239 #undef VAR 736 #undef VAR
240 737
241 static int default_loop; 738 static int ev_default_loop_ptr;
242 739
243#endif 740#endif
741
742#if EV_FEATURE_API
743# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
744# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
745# define EV_INVOKE_PENDING invoke_cb (EV_A)
746#else
747# define EV_RELEASE_CB (void)0
748# define EV_ACQUIRE_CB (void)0
749# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
750#endif
751
752#define EVBREAK_RECURSE 0x80
244 753
245/*****************************************************************************/ 754/*****************************************************************************/
246 755
247inline ev_tstamp 756#ifndef EV_HAVE_EV_TIME
757ev_tstamp
248ev_time (void) 758ev_time (void)
249{ 759{
250#if EV_USE_REALTIME 760#if EV_USE_REALTIME
761 if (expect_true (have_realtime))
762 {
251 struct timespec ts; 763 struct timespec ts;
252 clock_gettime (CLOCK_REALTIME, &ts); 764 clock_gettime (CLOCK_REALTIME, &ts);
253 return ts.tv_sec + ts.tv_nsec * 1e-9; 765 return ts.tv_sec + ts.tv_nsec * 1e-9;
254#else 766 }
767#endif
768
255 struct timeval tv; 769 struct timeval tv;
256 gettimeofday (&tv, 0); 770 gettimeofday (&tv, 0);
257 return tv.tv_sec + tv.tv_usec * 1e-6; 771 return tv.tv_sec + tv.tv_usec * 1e-6;
258#endif
259} 772}
773#endif
260 774
261inline ev_tstamp 775inline_size ev_tstamp
262get_clock (void) 776get_clock (void)
263{ 777{
264#if EV_USE_MONOTONIC 778#if EV_USE_MONOTONIC
265 if (expect_true (have_monotonic)) 779 if (expect_true (have_monotonic))
266 { 780 {
… …
271#endif 785#endif
272 786
273 return ev_time (); 787 return ev_time ();
274} 788}
275 789
790#if EV_MULTIPLICITY
276ev_tstamp 791ev_tstamp
277ev_now (EV_P) 792ev_now (EV_P)
278{ 793{
279 return rt_now; 794 return ev_rt_now;
280} 795}
796#endif
281 797
282#define array_roundsize(type,n) ((n) | 4 & ~3) 798void
799ev_sleep (ev_tstamp delay)
800{
801 if (delay > 0.)
802 {
803#if EV_USE_NANOSLEEP
804 struct timespec ts;
805
806 EV_TS_SET (ts, delay);
807 nanosleep (&ts, 0);
808#elif defined(_WIN32)
809 Sleep ((unsigned long)(delay * 1e3));
810#else
811 struct timeval tv;
812
813 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
814 /* something not guaranteed by newer posix versions, but guaranteed */
815 /* by older ones */
816 EV_TV_SET (tv, delay);
817 select (0, 0, 0, 0, &tv);
818#endif
819 }
820}
821
822/*****************************************************************************/
823
824#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
825
826/* find a suitable new size for the given array, */
827/* hopefully by rounding to a nice-to-malloc size */
828inline_size int
829array_nextsize (int elem, int cur, int cnt)
830{
831 int ncur = cur + 1;
832
833 do
834 ncur <<= 1;
835 while (cnt > ncur);
836
837 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
838 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
839 {
840 ncur *= elem;
841 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
842 ncur = ncur - sizeof (void *) * 4;
843 ncur /= elem;
844 }
845
846 return ncur;
847}
848
849static noinline void *
850array_realloc (int elem, void *base, int *cur, int cnt)
851{
852 *cur = array_nextsize (elem, *cur, cnt);
853 return ev_realloc (base, elem * *cur);
854}
855
856#define array_init_zero(base,count) \
857 memset ((void *)(base), 0, sizeof (*(base)) * (count))
283 858
284#define array_needsize(type,base,cur,cnt,init) \ 859#define array_needsize(type,base,cur,cnt,init) \
285 if (expect_false ((cnt) > cur)) \ 860 if (expect_false ((cnt) > (cur))) \
286 { \ 861 { \
287 int newcnt = cur; \ 862 int ocur_ = (cur); \
288 do \ 863 (base) = (type *)array_realloc \
289 { \ 864 (sizeof (type), (base), &(cur), (cnt)); \
290 newcnt = array_roundsize (type, newcnt << 1); \ 865 init ((base) + (ocur_), (cur) - ocur_); \
291 } \
292 while ((cnt) > newcnt); \
293 \
294 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
295 init (base + cur, newcnt - cur); \
296 cur = newcnt; \
297 } 866 }
298 867
868#if 0
299#define array_slim(type,stem) \ 869#define array_slim(type,stem) \
300 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 870 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
301 { \ 871 { \
302 stem ## max = array_roundsize (stem ## cnt >> 1); \ 872 stem ## max = array_roundsize (stem ## cnt >> 1); \
303 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 873 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
304 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 874 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
305 } 875 }
306 876#endif
307/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
308/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
309#define array_free_microshit(stem) \
310 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
311 877
312#define array_free(stem, idx) \ 878#define array_free(stem, idx) \
313 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 879 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
314 880
315/*****************************************************************************/ 881/*****************************************************************************/
316 882
317static void 883/* dummy callback for pending events */
318anfds_init (ANFD *base, int count) 884static void noinline
885pendingcb (EV_P_ ev_prepare *w, int revents)
319{ 886{
320 while (count--)
321 {
322 base->head = 0;
323 base->events = EV_NONE;
324 base->reify = 0;
325
326 ++base;
327 }
328} 887}
329 888
330void 889void noinline
331ev_feed_event (EV_P_ void *w, int revents) 890ev_feed_event (EV_P_ void *w, int revents)
332{ 891{
333 W w_ = (W)w; 892 W w_ = (W)w;
893 int pri = ABSPRI (w_);
334 894
335 if (w_->pending) 895 if (expect_false (w_->pending))
896 pendings [pri][w_->pending - 1].events |= revents;
897 else
336 { 898 {
899 w_->pending = ++pendingcnt [pri];
900 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
901 pendings [pri][w_->pending - 1].w = w_;
337 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 902 pendings [pri][w_->pending - 1].events = revents;
338 return;
339 } 903 }
340
341 w_->pending = ++pendingcnt [ABSPRI (w_)];
342 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
343 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
344 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
345} 904}
346 905
347static void 906inline_speed void
907feed_reverse (EV_P_ W w)
908{
909 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
910 rfeeds [rfeedcnt++] = w;
911}
912
913inline_size void
914feed_reverse_done (EV_P_ int revents)
915{
916 do
917 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
918 while (rfeedcnt);
919}
920
921inline_speed void
348queue_events (EV_P_ W *events, int eventcnt, int type) 922queue_events (EV_P_ W *events, int eventcnt, int type)
349{ 923{
350 int i; 924 int i;
351 925
352 for (i = 0; i < eventcnt; ++i) 926 for (i = 0; i < eventcnt; ++i)
353 ev_feed_event (EV_A_ events [i], type); 927 ev_feed_event (EV_A_ events [i], type);
354} 928}
355 929
930/*****************************************************************************/
931
356inline void 932inline_speed void
357fd_event (EV_P_ int fd, int revents) 933fd_event_nocheck (EV_P_ int fd, int revents)
358{ 934{
359 ANFD *anfd = anfds + fd; 935 ANFD *anfd = anfds + fd;
360 struct ev_io *w; 936 ev_io *w;
361 937
362 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 938 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
363 { 939 {
364 int ev = w->events & revents; 940 int ev = w->events & revents;
365 941
366 if (ev) 942 if (ev)
367 ev_feed_event (EV_A_ (W)w, ev); 943 ev_feed_event (EV_A_ (W)w, ev);
368 } 944 }
369} 945}
370 946
947/* do not submit kernel events for fds that have reify set */
948/* because that means they changed while we were polling for new events */
949inline_speed void
950fd_event (EV_P_ int fd, int revents)
951{
952 ANFD *anfd = anfds + fd;
953
954 if (expect_true (!anfd->reify))
955 fd_event_nocheck (EV_A_ fd, revents);
956}
957
371void 958void
372ev_feed_fd_event (EV_P_ int fd, int revents) 959ev_feed_fd_event (EV_P_ int fd, int revents)
373{ 960{
961 if (fd >= 0 && fd < anfdmax)
374 fd_event (EV_A_ fd, revents); 962 fd_event_nocheck (EV_A_ fd, revents);
375} 963}
376 964
377/*****************************************************************************/ 965/* make sure the external fd watch events are in-sync */
378 966/* with the kernel/libev internal state */
379static void 967inline_size void
380fd_reify (EV_P) 968fd_reify (EV_P)
381{ 969{
382 int i; 970 int i;
383 971
384 for (i = 0; i < fdchangecnt; ++i) 972 for (i = 0; i < fdchangecnt; ++i)
385 { 973 {
386 int fd = fdchanges [i]; 974 int fd = fdchanges [i];
387 ANFD *anfd = anfds + fd; 975 ANFD *anfd = anfds + fd;
388 struct ev_io *w; 976 ev_io *w;
389 977
390 int events = 0; 978 unsigned char o_events = anfd->events;
979 unsigned char o_reify = anfd->reify;
391 980
392 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
393 events |= w->events;
394
395 anfd->reify = 0; 981 anfd->reify = 0;
396 982
397 method_modify (EV_A_ fd, anfd->events, events); 983#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
984 if (o_reify & EV__IOFDSET)
985 {
986 unsigned long arg;
987 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
988 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989 printf ("oi %d %x\n", fd, anfd->handle);//D
990 }
991#endif
992
993 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
994 {
398 anfd->events = events; 995 anfd->events = 0;
996
997 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
998 anfd->events |= (unsigned char)w->events;
999
1000 if (o_events != anfd->events)
1001 o_reify = EV__IOFDSET; /* actually |= */
1002 }
1003
1004 if (o_reify & EV__IOFDSET)
1005 backend_modify (EV_A_ fd, o_events, anfd->events);
399 } 1006 }
400 1007
401 fdchangecnt = 0; 1008 fdchangecnt = 0;
402} 1009}
403 1010
404static void 1011/* something about the given fd changed */
1012inline_size void
405fd_change (EV_P_ int fd) 1013fd_change (EV_P_ int fd, int flags)
406{ 1014{
407 if (anfds [fd].reify) 1015 unsigned char reify = anfds [fd].reify;
408 return;
409
410 anfds [fd].reify = 1; 1016 anfds [fd].reify |= flags;
411 1017
1018 if (expect_true (!reify))
1019 {
412 ++fdchangecnt; 1020 ++fdchangecnt;
413 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 1021 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
414 fdchanges [fdchangecnt - 1] = fd; 1022 fdchanges [fdchangecnt - 1] = fd;
1023 }
415} 1024}
416 1025
417static void 1026/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027inline_speed void
418fd_kill (EV_P_ int fd) 1028fd_kill (EV_P_ int fd)
419{ 1029{
420 struct ev_io *w; 1030 ev_io *w;
421 1031
422 while ((w = (struct ev_io *)anfds [fd].head)) 1032 while ((w = (ev_io *)anfds [fd].head))
423 { 1033 {
424 ev_io_stop (EV_A_ w); 1034 ev_io_stop (EV_A_ w);
425 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1035 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
426 } 1036 }
427} 1037}
428 1038
429static int 1039/* check whether the given fd is actually valid, for error recovery */
1040inline_size int
430fd_valid (int fd) 1041fd_valid (int fd)
431{ 1042{
432#ifdef WIN32 1043#ifdef _WIN32
433 return !!win32_get_osfhandle (fd); 1044 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
434#else 1045#else
435 return fcntl (fd, F_GETFD) != -1; 1046 return fcntl (fd, F_GETFD) != -1;
436#endif 1047#endif
437} 1048}
438 1049
439/* called on EBADF to verify fds */ 1050/* called on EBADF to verify fds */
440static void 1051static void noinline
441fd_ebadf (EV_P) 1052fd_ebadf (EV_P)
442{ 1053{
443 int fd; 1054 int fd;
444 1055
445 for (fd = 0; fd < anfdmax; ++fd) 1056 for (fd = 0; fd < anfdmax; ++fd)
446 if (anfds [fd].events) 1057 if (anfds [fd].events)
447 if (!fd_valid (fd) == -1 && errno == EBADF) 1058 if (!fd_valid (fd) && errno == EBADF)
448 fd_kill (EV_A_ fd); 1059 fd_kill (EV_A_ fd);
449} 1060}
450 1061
451/* called on ENOMEM in select/poll to kill some fds and retry */ 1062/* called on ENOMEM in select/poll to kill some fds and retry */
452static void 1063static void noinline
453fd_enomem (EV_P) 1064fd_enomem (EV_P)
454{ 1065{
455 int fd; 1066 int fd;
456 1067
457 for (fd = anfdmax; fd--; ) 1068 for (fd = anfdmax; fd--; )
458 if (anfds [fd].events) 1069 if (anfds [fd].events)
459 { 1070 {
460 fd_kill (EV_A_ fd); 1071 fd_kill (EV_A_ fd);
461 return; 1072 break;
462 } 1073 }
463} 1074}
464 1075
465/* usually called after fork if method needs to re-arm all fds from scratch */ 1076/* usually called after fork if backend needs to re-arm all fds from scratch */
466static void 1077static void noinline
467fd_rearm_all (EV_P) 1078fd_rearm_all (EV_P)
468{ 1079{
469 int fd; 1080 int fd;
470 1081
471 /* this should be highly optimised to not do anything but set a flag */
472 for (fd = 0; fd < anfdmax; ++fd) 1082 for (fd = 0; fd < anfdmax; ++fd)
473 if (anfds [fd].events) 1083 if (anfds [fd].events)
474 { 1084 {
475 anfds [fd].events = 0; 1085 anfds [fd].events = 0;
476 fd_change (EV_A_ fd); 1086 anfds [fd].emask = 0;
1087 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
477 } 1088 }
478} 1089}
479 1090
1091/* used to prepare libev internal fd's */
1092/* this is not fork-safe */
1093inline_speed void
1094fd_intern (int fd)
1095{
1096#ifdef _WIN32
1097 unsigned long arg = 1;
1098 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1099#else
1100 fcntl (fd, F_SETFD, FD_CLOEXEC);
1101 fcntl (fd, F_SETFL, O_NONBLOCK);
1102#endif
1103}
1104
480/*****************************************************************************/ 1105/*****************************************************************************/
481 1106
1107/*
1108 * the heap functions want a real array index. array index 0 is guaranteed to not
1109 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1110 * the branching factor of the d-tree.
1111 */
1112
1113/*
1114 * at the moment we allow libev the luxury of two heaps,
1115 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1116 * which is more cache-efficient.
1117 * the difference is about 5% with 50000+ watchers.
1118 */
1119#if EV_USE_4HEAP
1120
1121#define DHEAP 4
1122#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1123#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1124#define UPHEAP_DONE(p,k) ((p) == (k))
1125
1126/* away from the root */
1127inline_speed void
1128downheap (ANHE *heap, int N, int k)
1129{
1130 ANHE he = heap [k];
1131 ANHE *E = heap + N + HEAP0;
1132
1133 for (;;)
1134 {
1135 ev_tstamp minat;
1136 ANHE *minpos;
1137 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1138
1139 /* find minimum child */
1140 if (expect_true (pos + DHEAP - 1 < E))
1141 {
1142 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1143 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1144 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1145 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1146 }
1147 else if (pos < E)
1148 {
1149 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1150 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1151 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1152 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1153 }
1154 else
1155 break;
1156
1157 if (ANHE_at (he) <= minat)
1158 break;
1159
1160 heap [k] = *minpos;
1161 ev_active (ANHE_w (*minpos)) = k;
1162
1163 k = minpos - heap;
1164 }
1165
1166 heap [k] = he;
1167 ev_active (ANHE_w (he)) = k;
1168}
1169
1170#else /* 4HEAP */
1171
1172#define HEAP0 1
1173#define HPARENT(k) ((k) >> 1)
1174#define UPHEAP_DONE(p,k) (!(p))
1175
1176/* away from the root */
1177inline_speed void
1178downheap (ANHE *heap, int N, int k)
1179{
1180 ANHE he = heap [k];
1181
1182 for (;;)
1183 {
1184 int c = k << 1;
1185
1186 if (c >= N + HEAP0)
1187 break;
1188
1189 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1190 ? 1 : 0;
1191
1192 if (ANHE_at (he) <= ANHE_at (heap [c]))
1193 break;
1194
1195 heap [k] = heap [c];
1196 ev_active (ANHE_w (heap [k])) = k;
1197
1198 k = c;
1199 }
1200
1201 heap [k] = he;
1202 ev_active (ANHE_w (he)) = k;
1203}
1204#endif
1205
1206/* towards the root */
1207inline_speed void
1208upheap (ANHE *heap, int k)
1209{
1210 ANHE he = heap [k];
1211
1212 for (;;)
1213 {
1214 int p = HPARENT (k);
1215
1216 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1217 break;
1218
1219 heap [k] = heap [p];
1220 ev_active (ANHE_w (heap [k])) = k;
1221 k = p;
1222 }
1223
1224 heap [k] = he;
1225 ev_active (ANHE_w (he)) = k;
1226}
1227
1228/* move an element suitably so it is in a correct place */
1229inline_size void
1230adjustheap (ANHE *heap, int N, int k)
1231{
1232 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1233 upheap (heap, k);
1234 else
1235 downheap (heap, N, k);
1236}
1237
1238/* rebuild the heap: this function is used only once and executed rarely */
1239inline_size void
1240reheap (ANHE *heap, int N)
1241{
1242 int i;
1243
1244 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1245 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1246 for (i = 0; i < N; ++i)
1247 upheap (heap, i + HEAP0);
1248}
1249
1250/*****************************************************************************/
1251
1252/* associate signal watchers to a signal signal */
1253typedef struct
1254{
1255 EV_ATOMIC_T pending;
1256#if EV_MULTIPLICITY
1257 EV_P;
1258#endif
1259 WL head;
1260} ANSIG;
1261
1262static ANSIG signals [EV_NSIG - 1];
1263
1264/*****************************************************************************/
1265
1266#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1267
1268static void noinline
1269evpipe_init (EV_P)
1270{
1271 if (!ev_is_active (&pipe_w))
1272 {
1273# if EV_USE_EVENTFD
1274 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1275 if (evfd < 0 && errno == EINVAL)
1276 evfd = eventfd (0, 0);
1277
1278 if (evfd >= 0)
1279 {
1280 evpipe [0] = -1;
1281 fd_intern (evfd); /* doing it twice doesn't hurt */
1282 ev_io_set (&pipe_w, evfd, EV_READ);
1283 }
1284 else
1285# endif
1286 {
1287 while (pipe (evpipe))
1288 ev_syserr ("(libev) error creating signal/async pipe");
1289
1290 fd_intern (evpipe [0]);
1291 fd_intern (evpipe [1]);
1292 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1293 }
1294
1295 ev_io_start (EV_A_ &pipe_w);
1296 ev_unref (EV_A); /* watcher should not keep loop alive */
1297 }
1298}
1299
1300inline_size void
1301evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302{
1303 if (!*flag)
1304 {
1305 int old_errno = errno; /* save errno because write might clobber it */
1306 char dummy;
1307
1308 *flag = 1;
1309
1310#if EV_USE_EVENTFD
1311 if (evfd >= 0)
1312 {
1313 uint64_t counter = 1;
1314 write (evfd, &counter, sizeof (uint64_t));
1315 }
1316 else
1317#endif
1318 /* win32 people keep sending patches that change this write() to send() */
1319 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320 /* so when you think this write should be a send instead, please find out */
1321 /* where your send() is from - it's definitely not the microsoft send, and */
1322 /* tell me. thank you. */
1323 write (evpipe [1], &dummy, 1);
1324
1325 errno = old_errno;
1326 }
1327}
1328
1329/* called whenever the libev signal pipe */
1330/* got some events (signal, async) */
482static void 1331static void
483upheap (WT *heap, int k) 1332pipecb (EV_P_ ev_io *iow, int revents)
484{ 1333{
485 WT w = heap [k]; 1334 int i;
486 1335
487 while (k && heap [k >> 1]->at > w->at) 1336#if EV_USE_EVENTFD
488 { 1337 if (evfd >= 0)
489 heap [k] = heap [k >> 1];
490 ((W)heap [k])->active = k + 1;
491 k >>= 1;
492 } 1338 {
1339 uint64_t counter;
1340 read (evfd, &counter, sizeof (uint64_t));
1341 }
1342 else
1343#endif
1344 {
1345 char dummy;
1346 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1347 read (evpipe [0], &dummy, 1);
1348 }
493 1349
494 heap [k] = w; 1350 if (sig_pending)
495 ((W)heap [k])->active = k + 1; 1351 {
1352 sig_pending = 0;
496 1353
1354 for (i = EV_NSIG - 1; i--; )
1355 if (expect_false (signals [i].pending))
1356 ev_feed_signal_event (EV_A_ i + 1);
1357 }
1358
1359#if EV_ASYNC_ENABLE
1360 if (async_pending)
1361 {
1362 async_pending = 0;
1363
1364 for (i = asynccnt; i--; )
1365 if (asyncs [i]->sent)
1366 {
1367 asyncs [i]->sent = 0;
1368 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1369 }
1370 }
1371#endif
497} 1372}
1373
1374/*****************************************************************************/
498 1375
499static void 1376static void
500downheap (WT *heap, int N, int k)
501{
502 WT w = heap [k];
503
504 while (k < (N >> 1))
505 {
506 int j = k << 1;
507
508 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
509 ++j;
510
511 if (w->at <= heap [j]->at)
512 break;
513
514 heap [k] = heap [j];
515 ((W)heap [k])->active = k + 1;
516 k = j;
517 }
518
519 heap [k] = w;
520 ((W)heap [k])->active = k + 1;
521}
522
523/*****************************************************************************/
524
525typedef struct
526{
527 WL head;
528 sig_atomic_t volatile gotsig;
529} ANSIG;
530
531static ANSIG *signals;
532static int signalmax;
533
534static int sigpipe [2];
535static sig_atomic_t volatile gotsig;
536static struct ev_io sigev;
537
538static void
539signals_init (ANSIG *base, int count)
540{
541 while (count--)
542 {
543 base->head = 0;
544 base->gotsig = 0;
545
546 ++base;
547 }
548}
549
550static void
551sighandler (int signum) 1377ev_sighandler (int signum)
552{ 1378{
553#if WIN32 1379#if EV_MULTIPLICITY
554 signal (signum, sighandler); 1380 EV_P = signals [signum - 1].loop;
555#endif 1381#endif
556 1382
557 signals [signum - 1].gotsig = 1;
558
559 if (!gotsig)
560 {
561 int old_errno = errno;
562 gotsig = 1;
563#ifdef WIN32 1383#ifdef _WIN32
564 send (sigpipe [1], &signum, 1, MSG_DONTWAIT); 1384 signal (signum, ev_sighandler);
565#else
566 write (sigpipe [1], &signum, 1);
567#endif 1385#endif
568 errno = old_errno;
569 }
570}
571 1386
572void 1387 signals [signum - 1].pending = 1;
1388 evpipe_write (EV_A_ &sig_pending);
1389}
1390
1391void noinline
573ev_feed_signal_event (EV_P_ int signum) 1392ev_feed_signal_event (EV_P_ int signum)
574{ 1393{
575 WL w; 1394 WL w;
576 1395
1396 if (expect_false (signum <= 0 || signum > EV_NSIG))
1397 return;
1398
1399 --signum;
1400
577#if EV_MULTIPLICITY 1401#if EV_MULTIPLICITY
578 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1402 /* it is permissible to try to feed a signal to the wrong loop */
579#endif 1403 /* or, likely more useful, feeding a signal nobody is waiting for */
580 1404
581 --signum; 1405 if (expect_false (signals [signum].loop != EV_A))
582
583 if (signum < 0 || signum >= signalmax)
584 return; 1406 return;
1407#endif
585 1408
586 signals [signum].gotsig = 0; 1409 signals [signum].pending = 0;
587 1410
588 for (w = signals [signum].head; w; w = w->next) 1411 for (w = signals [signum].head; w; w = w->next)
589 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1412 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
590} 1413}
591 1414
1415#if EV_USE_SIGNALFD
592static void 1416static void
593sigcb (EV_P_ struct ev_io *iow, int revents) 1417sigfdcb (EV_P_ ev_io *iow, int revents)
594{ 1418{
595 int signum; 1419 struct signalfd_siginfo si[2], *sip; /* these structs are big */
596 1420
597#ifdef WIN32 1421 for (;;)
598 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 1422 {
599#else 1423 ssize_t res = read (sigfd, si, sizeof (si));
600 read (sigpipe [0], &revents, 1);
601#endif
602 gotsig = 0;
603 1424
604 for (signum = signalmax; signum--; ) 1425 /* not ISO-C, as res might be -1, but works with SuS */
605 if (signals [signum].gotsig) 1426 for (sip = si; (char *)sip < (char *)si + res; ++sip)
606 ev_feed_signal_event (EV_A_ signum + 1); 1427 ev_feed_signal_event (EV_A_ sip->ssi_signo);
607}
608 1428
609static void 1429 if (res < (ssize_t)sizeof (si))
610siginit (EV_P) 1430 break;
611{ 1431 }
612#ifndef WIN32
613 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
614 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
615
616 /* rather than sort out wether we really need nb, set it */
617 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
618 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
619#endif
620
621 ev_io_set (&sigev, sigpipe [0], EV_READ);
622 ev_io_start (EV_A_ &sigev);
623 ev_unref (EV_A); /* child watcher should not keep loop alive */
624} 1432}
1433#endif
1434
1435#endif
625 1436
626/*****************************************************************************/ 1437/*****************************************************************************/
627 1438
628static struct ev_child *childs [PID_HASHSIZE]; 1439#if EV_CHILD_ENABLE
1440static WL childs [EV_PID_HASHSIZE];
629 1441
630#ifndef WIN32
631
632static struct ev_signal childev; 1442static ev_signal childev;
1443
1444#ifndef WIFCONTINUED
1445# define WIFCONTINUED(status) 0
1446#endif
1447
1448/* handle a single child status event */
1449inline_speed void
1450child_reap (EV_P_ int chain, int pid, int status)
1451{
1452 ev_child *w;
1453 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1454
1455 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1456 {
1457 if ((w->pid == pid || !w->pid)
1458 && (!traced || (w->flags & 1)))
1459 {
1460 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1461 w->rpid = pid;
1462 w->rstatus = status;
1463 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1464 }
1465 }
1466}
633 1467
634#ifndef WCONTINUED 1468#ifndef WCONTINUED
635# define WCONTINUED 0 1469# define WCONTINUED 0
636#endif 1470#endif
637 1471
1472/* called on sigchld etc., calls waitpid */
638static void 1473static void
639child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
640{
641 struct ev_child *w;
642
643 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
644 if (w->pid == pid || !w->pid)
645 {
646 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
647 w->rpid = pid;
648 w->rstatus = status;
649 ev_feed_event (EV_A_ (W)w, EV_CHILD);
650 }
651}
652
653static void
654childcb (EV_P_ struct ev_signal *sw, int revents) 1474childcb (EV_P_ ev_signal *sw, int revents)
655{ 1475{
656 int pid, status; 1476 int pid, status;
657 1477
1478 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
658 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1479 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
659 { 1480 if (!WCONTINUED
1481 || errno != EINVAL
1482 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1483 return;
1484
660 /* make sure we are called again until all childs have been reaped */ 1485 /* make sure we are called again until all children have been reaped */
1486 /* we need to do it this way so that the callback gets called before we continue */
661 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1487 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
662 1488
663 child_reap (EV_A_ sw, pid, pid, status); 1489 child_reap (EV_A_ pid, pid, status);
1490 if ((EV_PID_HASHSIZE) > 1)
664 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1491 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
665 }
666} 1492}
667 1493
668#endif 1494#endif
669 1495
670/*****************************************************************************/ 1496/*****************************************************************************/
671 1497
1498#if EV_USE_IOCP
1499# include "ev_iocp.c"
1500#endif
1501#if EV_USE_PORT
1502# include "ev_port.c"
1503#endif
672#if EV_USE_KQUEUE 1504#if EV_USE_KQUEUE
673# include "ev_kqueue.c" 1505# include "ev_kqueue.c"
674#endif 1506#endif
675#if EV_USE_EPOLL 1507#if EV_USE_EPOLL
676# include "ev_epoll.c" 1508# include "ev_epoll.c"
… …
693{ 1525{
694 return EV_VERSION_MINOR; 1526 return EV_VERSION_MINOR;
695} 1527}
696 1528
697/* return true if we are running with elevated privileges and should ignore env variables */ 1529/* return true if we are running with elevated privileges and should ignore env variables */
698static int 1530int inline_size
699enable_secure (void) 1531enable_secure (void)
700{ 1532{
701#ifdef WIN32 1533#ifdef _WIN32
702 return 0; 1534 return 0;
703#else 1535#else
704 return getuid () != geteuid () 1536 return getuid () != geteuid ()
705 || getgid () != getegid (); 1537 || getgid () != getegid ();
706#endif 1538#endif
707} 1539}
708 1540
709int 1541unsigned int
1542ev_supported_backends (void)
1543{
1544 unsigned int flags = 0;
1545
1546 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1547 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1548 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1549 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1550 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1551
1552 return flags;
1553}
1554
1555unsigned int
1556ev_recommended_backends (void)
1557{
1558 unsigned int flags = ev_supported_backends ();
1559
1560#ifndef __NetBSD__
1561 /* kqueue is borked on everything but netbsd apparently */
1562 /* it usually doesn't work correctly on anything but sockets and pipes */
1563 flags &= ~EVBACKEND_KQUEUE;
1564#endif
1565#ifdef __APPLE__
1566 /* only select works correctly on that "unix-certified" platform */
1567 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1568 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1569#endif
1570#ifdef __FreeBSD__
1571 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1572#endif
1573
1574 return flags;
1575}
1576
1577unsigned int
1578ev_embeddable_backends (void)
1579{
1580 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1581
1582 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1583 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1584 flags &= ~EVBACKEND_EPOLL;
1585
1586 return flags;
1587}
1588
1589unsigned int
1590ev_backend (EV_P)
1591{
1592 return backend;
1593}
1594
1595#if EV_FEATURE_API
1596unsigned int
1597ev_iteration (EV_P)
1598{
1599 return loop_count;
1600}
1601
1602unsigned int
710ev_method (EV_P) 1603ev_depth (EV_P)
711{ 1604{
712 return method; 1605 return loop_depth;
713} 1606}
714 1607
715static void 1608void
716loop_init (EV_P_ int methods) 1609ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
717{ 1610{
718 if (!method) 1611 io_blocktime = interval;
1612}
1613
1614void
1615ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1616{
1617 timeout_blocktime = interval;
1618}
1619
1620void
1621ev_set_userdata (EV_P_ void *data)
1622{
1623 userdata = data;
1624}
1625
1626void *
1627ev_userdata (EV_P)
1628{
1629 return userdata;
1630}
1631
1632void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1633{
1634 invoke_cb = invoke_pending_cb;
1635}
1636
1637void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1638{
1639 release_cb = release;
1640 acquire_cb = acquire;
1641}
1642#endif
1643
1644/* initialise a loop structure, must be zero-initialised */
1645static void noinline
1646loop_init (EV_P_ unsigned int flags)
1647{
1648 if (!backend)
719 { 1649 {
1650#if EV_USE_REALTIME
1651 if (!have_realtime)
1652 {
1653 struct timespec ts;
1654
1655 if (!clock_gettime (CLOCK_REALTIME, &ts))
1656 have_realtime = 1;
1657 }
1658#endif
1659
720#if EV_USE_MONOTONIC 1660#if EV_USE_MONOTONIC
1661 if (!have_monotonic)
1662 {
1663 struct timespec ts;
1664
1665 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1666 have_monotonic = 1;
1667 }
1668#endif
1669
1670 /* pid check not overridable via env */
1671#ifndef _WIN32
1672 if (flags & EVFLAG_FORKCHECK)
1673 curpid = getpid ();
1674#endif
1675
1676 if (!(flags & EVFLAG_NOENV)
1677 && !enable_secure ()
1678 && getenv ("LIBEV_FLAGS"))
1679 flags = atoi (getenv ("LIBEV_FLAGS"));
1680
1681 ev_rt_now = ev_time ();
1682 mn_now = get_clock ();
1683 now_floor = mn_now;
1684 rtmn_diff = ev_rt_now - mn_now;
1685#if EV_FEATURE_API
1686 invoke_cb = ev_invoke_pending;
1687#endif
1688
1689 io_blocktime = 0.;
1690 timeout_blocktime = 0.;
1691 backend = 0;
1692 backend_fd = -1;
1693 sig_pending = 0;
1694#if EV_ASYNC_ENABLE
1695 async_pending = 0;
1696#endif
1697#if EV_USE_INOTIFY
1698 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699#endif
1700#if EV_USE_SIGNALFD
1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702#endif
1703
1704 if (!(flags & 0x0000ffffU))
1705 flags |= ev_recommended_backends ();
1706
1707#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif
1710#if EV_USE_PORT
1711 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1712#endif
1713#if EV_USE_KQUEUE
1714 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1715#endif
1716#if EV_USE_EPOLL
1717 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1718#endif
1719#if EV_USE_POLL
1720 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1721#endif
1722#if EV_USE_SELECT
1723 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1724#endif
1725
1726 ev_prepare_init (&pending_w, pendingcb);
1727
1728#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1729 ev_init (&pipe_w, pipecb);
1730 ev_set_priority (&pipe_w, EV_MAXPRI);
1731#endif
1732 }
1733}
1734
1735/* free up a loop structure */
1736void
1737ev_loop_destroy (EV_P)
1738{
1739 int i;
1740
1741#if EV_CHILD_ENABLE
1742 if (ev_is_active (&childev))
1743 {
1744 ev_ref (EV_A); /* child watcher */
1745 ev_signal_stop (EV_A_ &childev);
1746 }
1747#endif
1748
1749 if (ev_is_active (&pipe_w))
1750 {
1751 /*ev_ref (EV_A);*/
1752 /*ev_io_stop (EV_A_ &pipe_w);*/
1753
1754#if EV_USE_EVENTFD
1755 if (evfd >= 0)
1756 close (evfd);
1757#endif
1758
1759 if (evpipe [0] >= 0)
1760 {
1761 EV_WIN32_CLOSE_FD (evpipe [0]);
1762 EV_WIN32_CLOSE_FD (evpipe [1]);
1763 }
1764 }
1765
1766#if EV_USE_SIGNALFD
1767 if (ev_is_active (&sigfd_w))
1768 close (sigfd);
1769#endif
1770
1771#if EV_USE_INOTIFY
1772 if (fs_fd >= 0)
1773 close (fs_fd);
1774#endif
1775
1776 if (backend_fd >= 0)
1777 close (backend_fd);
1778
1779#if EV_USE_IOCP
1780 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1781#endif
1782#if EV_USE_PORT
1783 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1784#endif
1785#if EV_USE_KQUEUE
1786 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1787#endif
1788#if EV_USE_EPOLL
1789 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1790#endif
1791#if EV_USE_POLL
1792 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1793#endif
1794#if EV_USE_SELECT
1795 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1796#endif
1797
1798 for (i = NUMPRI; i--; )
1799 {
1800 array_free (pending, [i]);
1801#if EV_IDLE_ENABLE
1802 array_free (idle, [i]);
1803#endif
1804 }
1805
1806 ev_free (anfds); anfds = 0; anfdmax = 0;
1807
1808 /* have to use the microsoft-never-gets-it-right macro */
1809 array_free (rfeed, EMPTY);
1810 array_free (fdchange, EMPTY);
1811 array_free (timer, EMPTY);
1812#if EV_PERIODIC_ENABLE
1813 array_free (periodic, EMPTY);
1814#endif
1815#if EV_FORK_ENABLE
1816 array_free (fork, EMPTY);
1817#endif
1818#if EV_CLEANUP_ENABLE
1819 array_free (cleanup, EMPTY);
1820#endif
1821 array_free (prepare, EMPTY);
1822 array_free (check, EMPTY);
1823#if EV_ASYNC_ENABLE
1824 array_free (async, EMPTY);
1825#endif
1826
1827 backend = 0;
1828
1829#if EV_MULTIPLICITY
1830 if (ev_is_default_loop (EV_A))
1831#endif
1832 ev_default_loop_ptr = 0;
1833#if EV_MULTIPLICITY
1834 else
1835 ev_free (EV_A);
1836#endif
1837}
1838
1839#if EV_USE_INOTIFY
1840inline_size void infy_fork (EV_P);
1841#endif
1842
1843inline_size void
1844loop_fork (EV_P)
1845{
1846#if EV_USE_PORT
1847 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1848#endif
1849#if EV_USE_KQUEUE
1850 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1851#endif
1852#if EV_USE_EPOLL
1853 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1854#endif
1855#if EV_USE_INOTIFY
1856 infy_fork (EV_A);
1857#endif
1858
1859 if (ev_is_active (&pipe_w))
1860 {
1861 /* this "locks" the handlers against writing to the pipe */
1862 /* while we modify the fd vars */
1863 sig_pending = 1;
1864#if EV_ASYNC_ENABLE
1865 async_pending = 1;
1866#endif
1867
1868 ev_ref (EV_A);
1869 ev_io_stop (EV_A_ &pipe_w);
1870
1871#if EV_USE_EVENTFD
1872 if (evfd >= 0)
1873 close (evfd);
1874#endif
1875
1876 if (evpipe [0] >= 0)
1877 {
1878 EV_WIN32_CLOSE_FD (evpipe [0]);
1879 EV_WIN32_CLOSE_FD (evpipe [1]);
1880 }
1881
1882#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1883 evpipe_init (EV_A);
1884 /* now iterate over everything, in case we missed something */
1885 pipecb (EV_A_ &pipe_w, EV_READ);
1886#endif
1887 }
1888
1889 postfork = 0;
1890}
1891
1892#if EV_MULTIPLICITY
1893
1894struct ev_loop *
1895ev_loop_new (unsigned int flags)
1896{
1897 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1898
1899 memset (EV_A, 0, sizeof (struct ev_loop));
1900 loop_init (EV_A_ flags);
1901
1902 if (ev_backend (EV_A))
1903 return EV_A;
1904
1905 ev_free (EV_A);
1906 return 0;
1907}
1908
1909#endif /* multiplicity */
1910
1911#if EV_VERIFY
1912static void noinline
1913verify_watcher (EV_P_ W w)
1914{
1915 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1916
1917 if (w->pending)
1918 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1919}
1920
1921static void noinline
1922verify_heap (EV_P_ ANHE *heap, int N)
1923{
1924 int i;
1925
1926 for (i = HEAP0; i < N + HEAP0; ++i)
1927 {
1928 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1929 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1930 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1931
1932 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1933 }
1934}
1935
1936static void noinline
1937array_verify (EV_P_ W *ws, int cnt)
1938{
1939 while (cnt--)
1940 {
1941 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1942 verify_watcher (EV_A_ ws [cnt]);
1943 }
1944}
1945#endif
1946
1947#if EV_FEATURE_API
1948void
1949ev_verify (EV_P)
1950{
1951#if EV_VERIFY
1952 int i;
1953 WL w;
1954
1955 assert (activecnt >= -1);
1956
1957 assert (fdchangemax >= fdchangecnt);
1958 for (i = 0; i < fdchangecnt; ++i)
1959 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1960
1961 assert (anfdmax >= 0);
1962 for (i = 0; i < anfdmax; ++i)
1963 for (w = anfds [i].head; w; w = w->next)
721 { 1964 {
722 struct timespec ts; 1965 verify_watcher (EV_A_ (W)w);
723 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1966 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
724 have_monotonic = 1; 1967 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
725 } 1968 }
726#endif
727 1969
728 rt_now = ev_time (); 1970 assert (timermax >= timercnt);
729 mn_now = get_clock (); 1971 verify_heap (EV_A_ timers, timercnt);
730 now_floor = mn_now;
731 rtmn_diff = rt_now - mn_now;
732 1972
733 if (methods == EVMETHOD_AUTO) 1973#if EV_PERIODIC_ENABLE
734 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1974 assert (periodicmax >= periodiccnt);
735 methods = atoi (getenv ("LIBEV_METHODS")); 1975 verify_heap (EV_A_ periodics, periodiccnt);
736 else
737 methods = EVMETHOD_ANY;
738
739 method = 0;
740#if EV_USE_WIN32
741 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
742#endif
743#if EV_USE_KQUEUE
744 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
745#endif
746#if EV_USE_EPOLL
747 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
748#endif
749#if EV_USE_POLL
750 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
751#endif
752#if EV_USE_SELECT
753 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
754#endif
755
756 ev_watcher_init (&sigev, sigcb);
757 ev_set_priority (&sigev, EV_MAXPRI);
758 }
759}
760
761void
762loop_destroy (EV_P)
763{
764 int i;
765
766#if EV_USE_WIN32
767 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
768#endif
769#if EV_USE_KQUEUE
770 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
771#endif
772#if EV_USE_EPOLL
773 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
774#endif
775#if EV_USE_POLL
776 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
777#endif
778#if EV_USE_SELECT
779 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
780#endif 1976#endif
781 1977
782 for (i = NUMPRI; i--; ) 1978 for (i = NUMPRI; i--; )
783 array_free (pending, [i]); 1979 {
1980 assert (pendingmax [i] >= pendingcnt [i]);
1981#if EV_IDLE_ENABLE
1982 assert (idleall >= 0);
1983 assert (idlemax [i] >= idlecnt [i]);
1984 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1985#endif
1986 }
784 1987
785 /* have to use the microsoft-never-gets-it-right macro */ 1988#if EV_FORK_ENABLE
786 array_free_microshit (fdchange); 1989 assert (forkmax >= forkcnt);
787 array_free_microshit (timer); 1990 array_verify (EV_A_ (W *)forks, forkcnt);
788 array_free_microshit (periodic); 1991#endif
789 array_free_microshit (idle);
790 array_free_microshit (prepare);
791 array_free_microshit (check);
792 1992
793 method = 0; 1993#if EV_CLEANUP_ENABLE
794} 1994 assert (cleanupmax >= cleanupcnt);
1995 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
1996#endif
795 1997
796static void 1998#if EV_ASYNC_ENABLE
797loop_fork (EV_P) 1999 assert (asyncmax >= asynccnt);
798{ 2000 array_verify (EV_A_ (W *)asyncs, asynccnt);
799#if EV_USE_EPOLL 2001#endif
800 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 2002
2003#if EV_PREPARE_ENABLE
2004 assert (preparemax >= preparecnt);
2005 array_verify (EV_A_ (W *)prepares, preparecnt);
2006#endif
2007
2008#if EV_CHECK_ENABLE
2009 assert (checkmax >= checkcnt);
2010 array_verify (EV_A_ (W *)checks, checkcnt);
2011#endif
2012
2013# if 0
2014#if EV_CHILD_ENABLE
2015 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2016 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2017#endif
801#endif 2018# endif
802#if EV_USE_KQUEUE
803 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
804#endif 2019#endif
805
806 if (ev_is_active (&sigev))
807 {
808 /* default loop */
809
810 ev_ref (EV_A);
811 ev_io_stop (EV_A_ &sigev);
812 close (sigpipe [0]);
813 close (sigpipe [1]);
814
815 while (pipe (sigpipe))
816 syserr ("(libev) error creating pipe");
817
818 siginit (EV_A);
819 }
820
821 postfork = 0;
822} 2020}
823
824#if EV_MULTIPLICITY
825struct ev_loop *
826ev_loop_new (int methods)
827{
828 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
829
830 memset (loop, 0, sizeof (struct ev_loop));
831
832 loop_init (EV_A_ methods);
833
834 if (ev_method (EV_A))
835 return loop;
836
837 return 0;
838}
839
840void
841ev_loop_destroy (EV_P)
842{
843 loop_destroy (EV_A);
844 ev_free (loop);
845}
846
847void
848ev_loop_fork (EV_P)
849{
850 postfork = 1;
851}
852
853#endif 2021#endif
854 2022
855#if EV_MULTIPLICITY 2023#if EV_MULTIPLICITY
856struct ev_loop * 2024struct ev_loop *
857#else 2025#else
858int 2026int
859#endif 2027#endif
860ev_default_loop (int methods) 2028ev_default_loop (unsigned int flags)
861{ 2029{
862 if (sigpipe [0] == sigpipe [1])
863 if (pipe (sigpipe))
864 return 0;
865
866 if (!default_loop) 2030 if (!ev_default_loop_ptr)
867 { 2031 {
868#if EV_MULTIPLICITY 2032#if EV_MULTIPLICITY
869 struct ev_loop *loop = default_loop = &default_loop_struct; 2033 EV_P = ev_default_loop_ptr = &default_loop_struct;
870#else 2034#else
871 default_loop = 1; 2035 ev_default_loop_ptr = 1;
872#endif 2036#endif
873 2037
874 loop_init (EV_A_ methods); 2038 loop_init (EV_A_ flags);
875 2039
876 if (ev_method (EV_A)) 2040 if (ev_backend (EV_A))
877 { 2041 {
878 siginit (EV_A); 2042#if EV_CHILD_ENABLE
879
880#ifndef WIN32
881 ev_signal_init (&childev, childcb, SIGCHLD); 2043 ev_signal_init (&childev, childcb, SIGCHLD);
882 ev_set_priority (&childev, EV_MAXPRI); 2044 ev_set_priority (&childev, EV_MAXPRI);
883 ev_signal_start (EV_A_ &childev); 2045 ev_signal_start (EV_A_ &childev);
884 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2046 ev_unref (EV_A); /* child watcher should not keep loop alive */
885#endif 2047#endif
886 } 2048 }
887 else 2049 else
888 default_loop = 0; 2050 ev_default_loop_ptr = 0;
889 } 2051 }
890 2052
891 return default_loop; 2053 return ev_default_loop_ptr;
892} 2054}
893 2055
894void 2056void
895ev_default_destroy (void) 2057ev_loop_fork (EV_P)
896{ 2058{
897#if EV_MULTIPLICITY 2059 postfork = 1; /* must be in line with ev_default_fork */
898 struct ev_loop *loop = default_loop;
899#endif
900
901#ifndef WIN32
902 ev_ref (EV_A); /* child watcher */
903 ev_signal_stop (EV_A_ &childev);
904#endif
905
906 ev_ref (EV_A); /* signal watcher */
907 ev_io_stop (EV_A_ &sigev);
908
909 close (sigpipe [0]); sigpipe [0] = 0;
910 close (sigpipe [1]); sigpipe [1] = 0;
911
912 loop_destroy (EV_A);
913}
914
915void
916ev_default_fork (void)
917{
918#if EV_MULTIPLICITY
919 struct ev_loop *loop = default_loop;
920#endif
921
922 if (method)
923 postfork = 1;
924} 2060}
925 2061
926/*****************************************************************************/ 2062/*****************************************************************************/
927 2063
928static int 2064void
929any_pending (EV_P) 2065ev_invoke (EV_P_ void *w, int revents)
2066{
2067 EV_CB_INVOKE ((W)w, revents);
2068}
2069
2070unsigned int
2071ev_pending_count (EV_P)
930{ 2072{
931 int pri; 2073 int pri;
2074 unsigned int count = 0;
932 2075
933 for (pri = NUMPRI; pri--; ) 2076 for (pri = NUMPRI; pri--; )
934 if (pendingcnt [pri]) 2077 count += pendingcnt [pri];
935 return 1;
936 2078
937 return 0; 2079 return count;
938} 2080}
939 2081
940static void 2082void noinline
941call_pending (EV_P) 2083ev_invoke_pending (EV_P)
942{ 2084{
943 int pri; 2085 int pri;
944 2086
945 for (pri = NUMPRI; pri--; ) 2087 for (pri = NUMPRI; pri--; )
946 while (pendingcnt [pri]) 2088 while (pendingcnt [pri])
947 { 2089 {
948 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2090 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
949 2091
950 if (p->w) 2092 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
951 { 2093 /* ^ this is no longer true, as pending_w could be here */
2094
952 p->w->pending = 0; 2095 p->w->pending = 0;
953 EV_CB_INVOKE (p->w, p->events); 2096 EV_CB_INVOKE (p->w, p->events);
954 } 2097 EV_FREQUENT_CHECK;
955 } 2098 }
956} 2099}
957 2100
958static void 2101#if EV_IDLE_ENABLE
2102/* make idle watchers pending. this handles the "call-idle */
2103/* only when higher priorities are idle" logic */
2104inline_size void
2105idle_reify (EV_P)
2106{
2107 if (expect_false (idleall))
2108 {
2109 int pri;
2110
2111 for (pri = NUMPRI; pri--; )
2112 {
2113 if (pendingcnt [pri])
2114 break;
2115
2116 if (idlecnt [pri])
2117 {
2118 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2119 break;
2120 }
2121 }
2122 }
2123}
2124#endif
2125
2126/* make timers pending */
2127inline_size void
959timers_reify (EV_P) 2128timers_reify (EV_P)
960{ 2129{
2130 EV_FREQUENT_CHECK;
2131
961 while (timercnt && ((WT)timers [0])->at <= mn_now) 2132 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
962 { 2133 {
963 struct ev_timer *w = timers [0]; 2134 do
964
965 assert (("inactive timer on timer heap detected", ev_is_active (w)));
966
967 /* first reschedule or stop timer */
968 if (w->repeat)
969 { 2135 {
2136 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2137
2138 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2139
2140 /* first reschedule or stop timer */
2141 if (w->repeat)
2142 {
2143 ev_at (w) += w->repeat;
2144 if (ev_at (w) < mn_now)
2145 ev_at (w) = mn_now;
2146
970 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2147 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
971 ((WT)w)->at = mn_now + w->repeat; 2148
2149 ANHE_at_cache (timers [HEAP0]);
972 downheap ((WT *)timers, timercnt, 0); 2150 downheap (timers, timercnt, HEAP0);
2151 }
2152 else
2153 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2154
2155 EV_FREQUENT_CHECK;
2156 feed_reverse (EV_A_ (W)w);
973 } 2157 }
974 else 2158 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
975 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
976 2159
977 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2160 feed_reverse_done (EV_A_ EV_TIMER);
978 } 2161 }
979} 2162}
980 2163
981static void 2164#if EV_PERIODIC_ENABLE
2165/* make periodics pending */
2166inline_size void
982periodics_reify (EV_P) 2167periodics_reify (EV_P)
983{ 2168{
2169 EV_FREQUENT_CHECK;
2170
984 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 2171 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
985 { 2172 {
986 struct ev_periodic *w = periodics [0]; 2173 int feed_count = 0;
987 2174
2175 do
2176 {
2177 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2178
988 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2179 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
989 2180
990 /* first reschedule or stop timer */ 2181 /* first reschedule or stop timer */
2182 if (w->reschedule_cb)
2183 {
2184 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2185
2186 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2187
2188 ANHE_at_cache (periodics [HEAP0]);
2189 downheap (periodics, periodiccnt, HEAP0);
2190 }
2191 else if (w->interval)
2192 {
2193 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2194 /* if next trigger time is not sufficiently in the future, put it there */
2195 /* this might happen because of floating point inexactness */
2196 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2197 {
2198 ev_at (w) += w->interval;
2199
2200 /* if interval is unreasonably low we might still have a time in the past */
2201 /* so correct this. this will make the periodic very inexact, but the user */
2202 /* has effectively asked to get triggered more often than possible */
2203 if (ev_at (w) < ev_rt_now)
2204 ev_at (w) = ev_rt_now;
2205 }
2206
2207 ANHE_at_cache (periodics [HEAP0]);
2208 downheap (periodics, periodiccnt, HEAP0);
2209 }
2210 else
2211 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2212
2213 EV_FREQUENT_CHECK;
2214 feed_reverse (EV_A_ (W)w);
2215 }
2216 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2217
2218 feed_reverse_done (EV_A_ EV_PERIODIC);
2219 }
2220}
2221
2222/* simply recalculate all periodics */
2223/* TODO: maybe ensure that at least one event happens when jumping forward? */
2224static void noinline
2225periodics_reschedule (EV_P)
2226{
2227 int i;
2228
2229 /* adjust periodics after time jump */
2230 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2231 {
2232 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2233
991 if (w->reschedule_cb) 2234 if (w->reschedule_cb)
992 {
993 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); 2235 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
994
995 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
996 downheap ((WT *)periodics, periodiccnt, 0);
997 }
998 else if (w->interval) 2236 else if (w->interval)
999 { 2237 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1000 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1001 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
1002 downheap ((WT *)periodics, periodiccnt, 0);
1003 }
1004 else
1005 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1006 2238
1007 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2239 ANHE_at_cache (periodics [i]);
1008 } 2240 }
1009}
1010 2241
1011static void 2242 reheap (periodics, periodiccnt);
1012periodics_reschedule (EV_P) 2243}
2244#endif
2245
2246/* adjust all timers by a given offset */
2247static void noinline
2248timers_reschedule (EV_P_ ev_tstamp adjust)
1013{ 2249{
1014 int i; 2250 int i;
1015 2251
1016 /* adjust periodics after time jump */
1017 for (i = 0; i < periodiccnt; ++i) 2252 for (i = 0; i < timercnt; ++i)
1018 {
1019 struct ev_periodic *w = periodics [i];
1020
1021 if (w->reschedule_cb)
1022 ((WT)w)->at = w->reschedule_cb (w, rt_now);
1023 else if (w->interval)
1024 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1025 } 2253 {
1026 2254 ANHE *he = timers + i + HEAP0;
1027 /* now rebuild the heap */ 2255 ANHE_w (*he)->at += adjust;
1028 for (i = periodiccnt >> 1; i--; ) 2256 ANHE_at_cache (*he);
1029 downheap ((WT *)periodics, periodiccnt, i);
1030}
1031
1032inline int
1033time_update_monotonic (EV_P)
1034{
1035 mn_now = get_clock ();
1036
1037 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1038 { 2257 }
1039 rt_now = rtmn_diff + mn_now;
1040 return 0;
1041 }
1042 else
1043 {
1044 now_floor = mn_now;
1045 rt_now = ev_time ();
1046 return 1;
1047 }
1048} 2258}
1049 2259
1050static void 2260/* fetch new monotonic and realtime times from the kernel */
1051time_update (EV_P) 2261/* also detect if there was a timejump, and act accordingly */
2262inline_speed void
2263time_update (EV_P_ ev_tstamp max_block)
1052{ 2264{
1053 int i;
1054
1055#if EV_USE_MONOTONIC 2265#if EV_USE_MONOTONIC
1056 if (expect_true (have_monotonic)) 2266 if (expect_true (have_monotonic))
1057 { 2267 {
1058 if (time_update_monotonic (EV_A)) 2268 int i;
2269 ev_tstamp odiff = rtmn_diff;
2270
2271 mn_now = get_clock ();
2272
2273 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2274 /* interpolate in the meantime */
2275 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1059 { 2276 {
1060 ev_tstamp odiff = rtmn_diff; 2277 ev_rt_now = rtmn_diff + mn_now;
2278 return;
2279 }
1061 2280
2281 now_floor = mn_now;
2282 ev_rt_now = ev_time ();
2283
1062 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 2284 /* loop a few times, before making important decisions.
2285 * on the choice of "4": one iteration isn't enough,
2286 * in case we get preempted during the calls to
2287 * ev_time and get_clock. a second call is almost guaranteed
2288 * to succeed in that case, though. and looping a few more times
2289 * doesn't hurt either as we only do this on time-jumps or
2290 * in the unlikely event of having been preempted here.
2291 */
2292 for (i = 4; --i; )
1063 { 2293 {
1064 rtmn_diff = rt_now - mn_now; 2294 rtmn_diff = ev_rt_now - mn_now;
1065 2295
1066 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2296 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1067 return; /* all is well */ 2297 return; /* all is well */
1068 2298
1069 rt_now = ev_time (); 2299 ev_rt_now = ev_time ();
1070 mn_now = get_clock (); 2300 mn_now = get_clock ();
1071 now_floor = mn_now; 2301 now_floor = mn_now;
1072 } 2302 }
1073 2303
2304 /* no timer adjustment, as the monotonic clock doesn't jump */
2305 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2306# if EV_PERIODIC_ENABLE
2307 periodics_reschedule (EV_A);
2308# endif
2309 }
2310 else
2311#endif
2312 {
2313 ev_rt_now = ev_time ();
2314
2315 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2316 {
2317 /* adjust timers. this is easy, as the offset is the same for all of them */
2318 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2319#if EV_PERIODIC_ENABLE
1074 periodics_reschedule (EV_A); 2320 periodics_reschedule (EV_A);
1075 /* no timer adjustment, as the monotonic clock doesn't jump */ 2321#endif
1076 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1077 } 2322 }
1078 }
1079 else
1080#endif
1081 {
1082 rt_now = ev_time ();
1083 2323
1084 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1085 {
1086 periodics_reschedule (EV_A);
1087
1088 /* adjust timers. this is easy, as the offset is the same for all */
1089 for (i = 0; i < timercnt; ++i)
1090 ((WT)timers [i])->at += rt_now - mn_now;
1091 }
1092
1093 mn_now = rt_now; 2324 mn_now = ev_rt_now;
1094 } 2325 }
1095} 2326}
1096 2327
1097void 2328void
1098ev_ref (EV_P)
1099{
1100 ++activecnt;
1101}
1102
1103void
1104ev_unref (EV_P)
1105{
1106 --activecnt;
1107}
1108
1109static int loop_done;
1110
1111void
1112ev_loop (EV_P_ int flags) 2329ev_run (EV_P_ int flags)
1113{ 2330{
1114 double block; 2331#if EV_FEATURE_API
1115 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2332 ++loop_depth;
2333#endif
2334
2335 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2336
2337 loop_done = EVBREAK_CANCEL;
2338
2339 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1116 2340
1117 do 2341 do
1118 { 2342 {
2343#if EV_VERIFY >= 2
2344 ev_verify (EV_A);
2345#endif
2346
2347#ifndef _WIN32
2348 if (expect_false (curpid)) /* penalise the forking check even more */
2349 if (expect_false (getpid () != curpid))
2350 {
2351 curpid = getpid ();
2352 postfork = 1;
2353 }
2354#endif
2355
2356#if EV_FORK_ENABLE
2357 /* we might have forked, so queue fork handlers */
2358 if (expect_false (postfork))
2359 if (forkcnt)
2360 {
2361 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2362 EV_INVOKE_PENDING;
2363 }
2364#endif
2365
2366#if EV_PREPARE_ENABLE
1119 /* queue check watchers (and execute them) */ 2367 /* queue prepare watchers (and execute them) */
1120 if (expect_false (preparecnt)) 2368 if (expect_false (preparecnt))
1121 { 2369 {
1122 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2370 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1123 call_pending (EV_A); 2371 EV_INVOKE_PENDING;
1124 } 2372 }
2373#endif
2374
2375 if (expect_false (loop_done))
2376 break;
1125 2377
1126 /* we might have forked, so reify kernel state if necessary */ 2378 /* we might have forked, so reify kernel state if necessary */
1127 if (expect_false (postfork)) 2379 if (expect_false (postfork))
1128 loop_fork (EV_A); 2380 loop_fork (EV_A);
1129 2381
1130 /* update fd-related kernel structures */ 2382 /* update fd-related kernel structures */
1131 fd_reify (EV_A); 2383 fd_reify (EV_A);
1132 2384
1133 /* calculate blocking time */ 2385 /* calculate blocking time */
2386 {
2387 ev_tstamp waittime = 0.;
2388 ev_tstamp sleeptime = 0.;
1134 2389
1135 /* we only need this for !monotonic clock or timers, but as we basically 2390 /* remember old timestamp for io_blocktime calculation */
1136 always have timers, we just calculate it always */ 2391 ev_tstamp prev_mn_now = mn_now;
1137#if EV_USE_MONOTONIC 2392
1138 if (expect_true (have_monotonic)) 2393 /* update time to cancel out callback processing overhead */
1139 time_update_monotonic (EV_A); 2394 time_update (EV_A_ 1e100);
1140 else 2395
1141#endif 2396 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1142 { 2397 {
1143 rt_now = ev_time ();
1144 mn_now = rt_now;
1145 }
1146
1147 if (flags & EVLOOP_NONBLOCK || idlecnt)
1148 block = 0.;
1149 else
1150 {
1151 block = MAX_BLOCKTIME; 2398 waittime = MAX_BLOCKTIME;
1152 2399
1153 if (timercnt) 2400 if (timercnt)
1154 { 2401 {
1155 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2402 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1156 if (block > to) block = to; 2403 if (waittime > to) waittime = to;
1157 } 2404 }
1158 2405
2406#if EV_PERIODIC_ENABLE
1159 if (periodiccnt) 2407 if (periodiccnt)
1160 { 2408 {
1161 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 2409 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1162 if (block > to) block = to; 2410 if (waittime > to) waittime = to;
1163 } 2411 }
2412#endif
1164 2413
1165 if (block < 0.) block = 0.; 2414 /* don't let timeouts decrease the waittime below timeout_blocktime */
2415 if (expect_false (waittime < timeout_blocktime))
2416 waittime = timeout_blocktime;
2417
2418 /* extra check because io_blocktime is commonly 0 */
2419 if (expect_false (io_blocktime))
2420 {
2421 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2422
2423 if (sleeptime > waittime - backend_fudge)
2424 sleeptime = waittime - backend_fudge;
2425
2426 if (expect_true (sleeptime > 0.))
2427 {
2428 ev_sleep (sleeptime);
2429 waittime -= sleeptime;
2430 }
2431 }
1166 } 2432 }
1167 2433
1168 method_poll (EV_A_ block); 2434#if EV_FEATURE_API
2435 ++loop_count;
2436#endif
2437 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2438 backend_poll (EV_A_ waittime);
2439 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1169 2440
1170 /* update rt_now, do magic */ 2441 /* update ev_rt_now, do magic */
1171 time_update (EV_A); 2442 time_update (EV_A_ waittime + sleeptime);
2443 }
1172 2444
1173 /* queue pending timers and reschedule them */ 2445 /* queue pending timers and reschedule them */
1174 timers_reify (EV_A); /* relative timers called last */ 2446 timers_reify (EV_A); /* relative timers called last */
2447#if EV_PERIODIC_ENABLE
1175 periodics_reify (EV_A); /* absolute timers called first */ 2448 periodics_reify (EV_A); /* absolute timers called first */
2449#endif
1176 2450
2451#if EV_IDLE_ENABLE
1177 /* queue idle watchers unless io or timers are pending */ 2452 /* queue idle watchers unless other events are pending */
1178 if (idlecnt && !any_pending (EV_A)) 2453 idle_reify (EV_A);
1179 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2454#endif
1180 2455
2456#if EV_CHECK_ENABLE
1181 /* queue check watchers, to be executed first */ 2457 /* queue check watchers, to be executed first */
1182 if (checkcnt) 2458 if (expect_false (checkcnt))
1183 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2459 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2460#endif
1184 2461
1185 call_pending (EV_A); 2462 EV_INVOKE_PENDING;
1186 } 2463 }
1187 while (activecnt && !loop_done); 2464 while (expect_true (
2465 activecnt
2466 && !loop_done
2467 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2468 ));
1188 2469
1189 if (loop_done != 2) 2470 if (loop_done == EVBREAK_ONE)
1190 loop_done = 0; 2471 loop_done = EVBREAK_CANCEL;
1191}
1192 2472
2473#if EV_FEATURE_API
2474 --loop_depth;
2475#endif
2476}
2477
1193void 2478void
1194ev_unloop (EV_P_ int how) 2479ev_break (EV_P_ int how)
1195{ 2480{
1196 loop_done = how; 2481 loop_done = how;
1197} 2482}
1198 2483
2484void
2485ev_ref (EV_P)
2486{
2487 ++activecnt;
2488}
2489
2490void
2491ev_unref (EV_P)
2492{
2493 --activecnt;
2494}
2495
2496void
2497ev_now_update (EV_P)
2498{
2499 time_update (EV_A_ 1e100);
2500}
2501
2502void
2503ev_suspend (EV_P)
2504{
2505 ev_now_update (EV_A);
2506}
2507
2508void
2509ev_resume (EV_P)
2510{
2511 ev_tstamp mn_prev = mn_now;
2512
2513 ev_now_update (EV_A);
2514 timers_reschedule (EV_A_ mn_now - mn_prev);
2515#if EV_PERIODIC_ENABLE
2516 /* TODO: really do this? */
2517 periodics_reschedule (EV_A);
2518#endif
2519}
2520
1199/*****************************************************************************/ 2521/*****************************************************************************/
2522/* singly-linked list management, used when the expected list length is short */
1200 2523
1201inline void 2524inline_size void
1202wlist_add (WL *head, WL elem) 2525wlist_add (WL *head, WL elem)
1203{ 2526{
1204 elem->next = *head; 2527 elem->next = *head;
1205 *head = elem; 2528 *head = elem;
1206} 2529}
1207 2530
1208inline void 2531inline_size void
1209wlist_del (WL *head, WL elem) 2532wlist_del (WL *head, WL elem)
1210{ 2533{
1211 while (*head) 2534 while (*head)
1212 { 2535 {
1213 if (*head == elem) 2536 if (expect_true (*head == elem))
1214 { 2537 {
1215 *head = elem->next; 2538 *head = elem->next;
1216 return; 2539 break;
1217 } 2540 }
1218 2541
1219 head = &(*head)->next; 2542 head = &(*head)->next;
1220 } 2543 }
1221} 2544}
1222 2545
2546/* internal, faster, version of ev_clear_pending */
1223inline void 2547inline_speed void
1224ev_clear_pending (EV_P_ W w) 2548clear_pending (EV_P_ W w)
1225{ 2549{
1226 if (w->pending) 2550 if (w->pending)
1227 { 2551 {
1228 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2552 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1229 w->pending = 0; 2553 w->pending = 0;
1230 } 2554 }
1231} 2555}
1232 2556
2557int
2558ev_clear_pending (EV_P_ void *w)
2559{
2560 W w_ = (W)w;
2561 int pending = w_->pending;
2562
2563 if (expect_true (pending))
2564 {
2565 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2566 p->w = (W)&pending_w;
2567 w_->pending = 0;
2568 return p->events;
2569 }
2570 else
2571 return 0;
2572}
2573
1233inline void 2574inline_size void
2575pri_adjust (EV_P_ W w)
2576{
2577 int pri = ev_priority (w);
2578 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2579 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2580 ev_set_priority (w, pri);
2581}
2582
2583inline_speed void
1234ev_start (EV_P_ W w, int active) 2584ev_start (EV_P_ W w, int active)
1235{ 2585{
1236 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2586 pri_adjust (EV_A_ w);
1237 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1238
1239 w->active = active; 2587 w->active = active;
1240 ev_ref (EV_A); 2588 ev_ref (EV_A);
1241} 2589}
1242 2590
1243inline void 2591inline_size void
1244ev_stop (EV_P_ W w) 2592ev_stop (EV_P_ W w)
1245{ 2593{
1246 ev_unref (EV_A); 2594 ev_unref (EV_A);
1247 w->active = 0; 2595 w->active = 0;
1248} 2596}
1249 2597
1250/*****************************************************************************/ 2598/*****************************************************************************/
1251 2599
1252void 2600void noinline
1253ev_io_start (EV_P_ struct ev_io *w) 2601ev_io_start (EV_P_ ev_io *w)
1254{ 2602{
1255 int fd = w->fd; 2603 int fd = w->fd;
1256 2604
1257 if (ev_is_active (w)) 2605 if (expect_false (ev_is_active (w)))
1258 return; 2606 return;
1259 2607
1260 assert (("ev_io_start called with negative fd", fd >= 0)); 2608 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2609 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2610
2611 EV_FREQUENT_CHECK;
1261 2612
1262 ev_start (EV_A_ (W)w, 1); 2613 ev_start (EV_A_ (W)w, 1);
1263 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2614 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1264 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2615 wlist_add (&anfds[fd].head, (WL)w);
1265 2616
1266 fd_change (EV_A_ fd); 2617 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1267} 2618 w->events &= ~EV__IOFDSET;
1268 2619
1269void 2620 EV_FREQUENT_CHECK;
2621}
2622
2623void noinline
1270ev_io_stop (EV_P_ struct ev_io *w) 2624ev_io_stop (EV_P_ ev_io *w)
1271{ 2625{
1272 ev_clear_pending (EV_A_ (W)w); 2626 clear_pending (EV_A_ (W)w);
1273 if (!ev_is_active (w)) 2627 if (expect_false (!ev_is_active (w)))
1274 return; 2628 return;
1275 2629
2630 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2631
2632 EV_FREQUENT_CHECK;
2633
1276 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2634 wlist_del (&anfds[w->fd].head, (WL)w);
1277 ev_stop (EV_A_ (W)w); 2635 ev_stop (EV_A_ (W)w);
1278 2636
1279 fd_change (EV_A_ w->fd); 2637 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1280}
1281 2638
1282void 2639 EV_FREQUENT_CHECK;
2640}
2641
2642void noinline
1283ev_timer_start (EV_P_ struct ev_timer *w) 2643ev_timer_start (EV_P_ ev_timer *w)
1284{ 2644{
1285 if (ev_is_active (w)) 2645 if (expect_false (ev_is_active (w)))
1286 return; 2646 return;
1287 2647
1288 ((WT)w)->at += mn_now; 2648 ev_at (w) += mn_now;
1289 2649
1290 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2650 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1291 2651
2652 EV_FREQUENT_CHECK;
2653
2654 ++timercnt;
1292 ev_start (EV_A_ (W)w, ++timercnt); 2655 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1293 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2656 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1294 timers [timercnt - 1] = w; 2657 ANHE_w (timers [ev_active (w)]) = (WT)w;
1295 upheap ((WT *)timers, timercnt - 1); 2658 ANHE_at_cache (timers [ev_active (w)]);
2659 upheap (timers, ev_active (w));
1296 2660
2661 EV_FREQUENT_CHECK;
2662
1297 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2663 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1298} 2664}
1299 2665
1300void 2666void noinline
1301ev_timer_stop (EV_P_ struct ev_timer *w) 2667ev_timer_stop (EV_P_ ev_timer *w)
1302{ 2668{
1303 ev_clear_pending (EV_A_ (W)w); 2669 clear_pending (EV_A_ (W)w);
1304 if (!ev_is_active (w)) 2670 if (expect_false (!ev_is_active (w)))
1305 return; 2671 return;
1306 2672
2673 EV_FREQUENT_CHECK;
2674
2675 {
2676 int active = ev_active (w);
2677
1307 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2678 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1308 2679
1309 if (((W)w)->active < timercnt--) 2680 --timercnt;
2681
2682 if (expect_true (active < timercnt + HEAP0))
1310 { 2683 {
1311 timers [((W)w)->active - 1] = timers [timercnt]; 2684 timers [active] = timers [timercnt + HEAP0];
1312 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2685 adjustheap (timers, timercnt, active);
1313 } 2686 }
2687 }
1314 2688
1315 ((WT)w)->at = w->repeat; 2689 ev_at (w) -= mn_now;
1316 2690
1317 ev_stop (EV_A_ (W)w); 2691 ev_stop (EV_A_ (W)w);
1318}
1319 2692
1320void 2693 EV_FREQUENT_CHECK;
2694}
2695
2696void noinline
1321ev_timer_again (EV_P_ struct ev_timer *w) 2697ev_timer_again (EV_P_ ev_timer *w)
1322{ 2698{
2699 EV_FREQUENT_CHECK;
2700
1323 if (ev_is_active (w)) 2701 if (ev_is_active (w))
1324 { 2702 {
1325 if (w->repeat) 2703 if (w->repeat)
1326 { 2704 {
1327 ((WT)w)->at = mn_now + w->repeat; 2705 ev_at (w) = mn_now + w->repeat;
1328 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2706 ANHE_at_cache (timers [ev_active (w)]);
2707 adjustheap (timers, timercnt, ev_active (w));
1329 } 2708 }
1330 else 2709 else
1331 ev_timer_stop (EV_A_ w); 2710 ev_timer_stop (EV_A_ w);
1332 } 2711 }
1333 else if (w->repeat) 2712 else if (w->repeat)
2713 {
2714 ev_at (w) = w->repeat;
1334 ev_timer_start (EV_A_ w); 2715 ev_timer_start (EV_A_ w);
1335} 2716 }
1336 2717
1337void 2718 EV_FREQUENT_CHECK;
2719}
2720
2721ev_tstamp
2722ev_timer_remaining (EV_P_ ev_timer *w)
2723{
2724 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2725}
2726
2727#if EV_PERIODIC_ENABLE
2728void noinline
1338ev_periodic_start (EV_P_ struct ev_periodic *w) 2729ev_periodic_start (EV_P_ ev_periodic *w)
1339{ 2730{
1340 if (ev_is_active (w)) 2731 if (expect_false (ev_is_active (w)))
1341 return; 2732 return;
1342 2733
1343 if (w->reschedule_cb) 2734 if (w->reschedule_cb)
1344 ((WT)w)->at = w->reschedule_cb (w, rt_now); 2735 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1345 else if (w->interval) 2736 else if (w->interval)
1346 { 2737 {
1347 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2738 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1348 /* this formula differs from the one in periodic_reify because we do not always round up */ 2739 /* this formula differs from the one in periodic_reify because we do not always round up */
1349 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 2740 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1350 } 2741 }
2742 else
2743 ev_at (w) = w->offset;
1351 2744
2745 EV_FREQUENT_CHECK;
2746
2747 ++periodiccnt;
1352 ev_start (EV_A_ (W)w, ++periodiccnt); 2748 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1353 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2749 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1354 periodics [periodiccnt - 1] = w; 2750 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1355 upheap ((WT *)periodics, periodiccnt - 1); 2751 ANHE_at_cache (periodics [ev_active (w)]);
2752 upheap (periodics, ev_active (w));
1356 2753
2754 EV_FREQUENT_CHECK;
2755
1357 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2756 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1358} 2757}
1359 2758
1360void 2759void noinline
1361ev_periodic_stop (EV_P_ struct ev_periodic *w) 2760ev_periodic_stop (EV_P_ ev_periodic *w)
1362{ 2761{
1363 ev_clear_pending (EV_A_ (W)w); 2762 clear_pending (EV_A_ (W)w);
1364 if (!ev_is_active (w)) 2763 if (expect_false (!ev_is_active (w)))
1365 return; 2764 return;
1366 2765
2766 EV_FREQUENT_CHECK;
2767
2768 {
2769 int active = ev_active (w);
2770
1367 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2771 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1368 2772
1369 if (((W)w)->active < periodiccnt--) 2773 --periodiccnt;
2774
2775 if (expect_true (active < periodiccnt + HEAP0))
1370 { 2776 {
1371 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2777 periodics [active] = periodics [periodiccnt + HEAP0];
1372 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2778 adjustheap (periodics, periodiccnt, active);
1373 } 2779 }
2780 }
1374 2781
1375 ev_stop (EV_A_ (W)w); 2782 ev_stop (EV_A_ (W)w);
1376}
1377 2783
1378void 2784 EV_FREQUENT_CHECK;
2785}
2786
2787void noinline
1379ev_periodic_again (EV_P_ struct ev_periodic *w) 2788ev_periodic_again (EV_P_ ev_periodic *w)
1380{ 2789{
2790 /* TODO: use adjustheap and recalculation */
1381 ev_periodic_stop (EV_A_ w); 2791 ev_periodic_stop (EV_A_ w);
1382 ev_periodic_start (EV_A_ w); 2792 ev_periodic_start (EV_A_ w);
1383} 2793}
1384 2794#endif
1385void
1386ev_idle_start (EV_P_ struct ev_idle *w)
1387{
1388 if (ev_is_active (w))
1389 return;
1390
1391 ev_start (EV_A_ (W)w, ++idlecnt);
1392 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1393 idles [idlecnt - 1] = w;
1394}
1395
1396void
1397ev_idle_stop (EV_P_ struct ev_idle *w)
1398{
1399 ev_clear_pending (EV_A_ (W)w);
1400 if (ev_is_active (w))
1401 return;
1402
1403 idles [((W)w)->active - 1] = idles [--idlecnt];
1404 ev_stop (EV_A_ (W)w);
1405}
1406
1407void
1408ev_prepare_start (EV_P_ struct ev_prepare *w)
1409{
1410 if (ev_is_active (w))
1411 return;
1412
1413 ev_start (EV_A_ (W)w, ++preparecnt);
1414 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1415 prepares [preparecnt - 1] = w;
1416}
1417
1418void
1419ev_prepare_stop (EV_P_ struct ev_prepare *w)
1420{
1421 ev_clear_pending (EV_A_ (W)w);
1422 if (ev_is_active (w))
1423 return;
1424
1425 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1426 ev_stop (EV_A_ (W)w);
1427}
1428
1429void
1430ev_check_start (EV_P_ struct ev_check *w)
1431{
1432 if (ev_is_active (w))
1433 return;
1434
1435 ev_start (EV_A_ (W)w, ++checkcnt);
1436 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1437 checks [checkcnt - 1] = w;
1438}
1439
1440void
1441ev_check_stop (EV_P_ struct ev_check *w)
1442{
1443 ev_clear_pending (EV_A_ (W)w);
1444 if (ev_is_active (w))
1445 return;
1446
1447 checks [((W)w)->active - 1] = checks [--checkcnt];
1448 ev_stop (EV_A_ (W)w);
1449}
1450 2795
1451#ifndef SA_RESTART 2796#ifndef SA_RESTART
1452# define SA_RESTART 0 2797# define SA_RESTART 0
1453#endif 2798#endif
1454 2799
1455void 2800#if EV_SIGNAL_ENABLE
2801
2802void noinline
1456ev_signal_start (EV_P_ struct ev_signal *w) 2803ev_signal_start (EV_P_ ev_signal *w)
1457{ 2804{
2805 if (expect_false (ev_is_active (w)))
2806 return;
2807
2808 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2809
1458#if EV_MULTIPLICITY 2810#if EV_MULTIPLICITY
1459 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2811 assert (("libev: a signal must not be attached to two different loops",
2812 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2813
2814 signals [w->signum - 1].loop = EV_A;
2815#endif
2816
2817 EV_FREQUENT_CHECK;
2818
2819#if EV_USE_SIGNALFD
2820 if (sigfd == -2)
2821 {
2822 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2823 if (sigfd < 0 && errno == EINVAL)
2824 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2825
2826 if (sigfd >= 0)
2827 {
2828 fd_intern (sigfd); /* doing it twice will not hurt */
2829
2830 sigemptyset (&sigfd_set);
2831
2832 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2833 ev_set_priority (&sigfd_w, EV_MAXPRI);
2834 ev_io_start (EV_A_ &sigfd_w);
2835 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2836 }
2837 }
2838
2839 if (sigfd >= 0)
2840 {
2841 /* TODO: check .head */
2842 sigaddset (&sigfd_set, w->signum);
2843 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2844
2845 signalfd (sigfd, &sigfd_set, 0);
2846 }
2847#endif
2848
2849 ev_start (EV_A_ (W)w, 1);
2850 wlist_add (&signals [w->signum - 1].head, (WL)w);
2851
2852 if (!((WL)w)->next)
2853# if EV_USE_SIGNALFD
2854 if (sigfd < 0) /*TODO*/
1460#endif 2855# endif
1461 if (ev_is_active (w)) 2856 {
2857# ifdef _WIN32
2858 evpipe_init (EV_A);
2859
2860 signal (w->signum, ev_sighandler);
2861# else
2862 struct sigaction sa;
2863
2864 evpipe_init (EV_A);
2865
2866 sa.sa_handler = ev_sighandler;
2867 sigfillset (&sa.sa_mask);
2868 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2869 sigaction (w->signum, &sa, 0);
2870
2871 sigemptyset (&sa.sa_mask);
2872 sigaddset (&sa.sa_mask, w->signum);
2873 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2874#endif
2875 }
2876
2877 EV_FREQUENT_CHECK;
2878}
2879
2880void noinline
2881ev_signal_stop (EV_P_ ev_signal *w)
2882{
2883 clear_pending (EV_A_ (W)w);
2884 if (expect_false (!ev_is_active (w)))
1462 return; 2885 return;
1463 2886
1464 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2887 EV_FREQUENT_CHECK;
2888
2889 wlist_del (&signals [w->signum - 1].head, (WL)w);
2890 ev_stop (EV_A_ (W)w);
2891
2892 if (!signals [w->signum - 1].head)
2893 {
2894#if EV_MULTIPLICITY
2895 signals [w->signum - 1].loop = 0; /* unattach from signal */
2896#endif
2897#if EV_USE_SIGNALFD
2898 if (sigfd >= 0)
2899 {
2900 sigset_t ss;
2901
2902 sigemptyset (&ss);
2903 sigaddset (&ss, w->signum);
2904 sigdelset (&sigfd_set, w->signum);
2905
2906 signalfd (sigfd, &sigfd_set, 0);
2907 sigprocmask (SIG_UNBLOCK, &ss, 0);
2908 }
2909 else
2910#endif
2911 signal (w->signum, SIG_DFL);
2912 }
2913
2914 EV_FREQUENT_CHECK;
2915}
2916
2917#endif
2918
2919#if EV_CHILD_ENABLE
2920
2921void
2922ev_child_start (EV_P_ ev_child *w)
2923{
2924#if EV_MULTIPLICITY
2925 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2926#endif
2927 if (expect_false (ev_is_active (w)))
2928 return;
2929
2930 EV_FREQUENT_CHECK;
1465 2931
1466 ev_start (EV_A_ (W)w, 1); 2932 ev_start (EV_A_ (W)w, 1);
1467 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2933 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1468 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1469 2934
1470 if (!((WL)w)->next) 2935 EV_FREQUENT_CHECK;
2936}
2937
2938void
2939ev_child_stop (EV_P_ ev_child *w)
2940{
2941 clear_pending (EV_A_ (W)w);
2942 if (expect_false (!ev_is_active (w)))
2943 return;
2944
2945 EV_FREQUENT_CHECK;
2946
2947 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2948 ev_stop (EV_A_ (W)w);
2949
2950 EV_FREQUENT_CHECK;
2951}
2952
2953#endif
2954
2955#if EV_STAT_ENABLE
2956
2957# ifdef _WIN32
2958# undef lstat
2959# define lstat(a,b) _stati64 (a,b)
2960# endif
2961
2962#define DEF_STAT_INTERVAL 5.0074891
2963#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2964#define MIN_STAT_INTERVAL 0.1074891
2965
2966static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2967
2968#if EV_USE_INOTIFY
2969
2970/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2971# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2972
2973static void noinline
2974infy_add (EV_P_ ev_stat *w)
2975{
2976 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);
2977
2978 if (w->wd >= 0)
2979 {
2980 struct statfs sfs;
2981
2982 /* now local changes will be tracked by inotify, but remote changes won't */
2983 /* unless the filesystem is known to be local, we therefore still poll */
2984 /* also do poll on <2.6.25, but with normal frequency */
2985
2986 if (!fs_2625)
2987 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2988 else if (!statfs (w->path, &sfs)
2989 && (sfs.f_type == 0x1373 /* devfs */
2990 || sfs.f_type == 0xEF53 /* ext2/3 */
2991 || sfs.f_type == 0x3153464a /* jfs */
2992 || sfs.f_type == 0x52654973 /* reiser3 */
2993 || sfs.f_type == 0x01021994 /* tempfs */
2994 || sfs.f_type == 0x58465342 /* xfs */))
2995 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2996 else
2997 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1471 { 2998 }
1472#if WIN32 2999 else
1473 signal (w->signum, sighandler); 3000 {
3001 /* can't use inotify, continue to stat */
3002 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3003
3004 /* if path is not there, monitor some parent directory for speedup hints */
3005 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3006 /* but an efficiency issue only */
3007 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3008 {
3009 char path [4096];
3010 strcpy (path, w->path);
3011
3012 do
3013 {
3014 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3015 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3016
3017 char *pend = strrchr (path, '/');
3018
3019 if (!pend || pend == path)
3020 break;
3021
3022 *pend = 0;
3023 w->wd = inotify_add_watch (fs_fd, path, mask);
3024 }
3025 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3026 }
3027 }
3028
3029 if (w->wd >= 0)
3030 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3031
3032 /* now re-arm timer, if required */
3033 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3034 ev_timer_again (EV_A_ &w->timer);
3035 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3036}
3037
3038static void noinline
3039infy_del (EV_P_ ev_stat *w)
3040{
3041 int slot;
3042 int wd = w->wd;
3043
3044 if (wd < 0)
3045 return;
3046
3047 w->wd = -2;
3048 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3049 wlist_del (&fs_hash [slot].head, (WL)w);
3050
3051 /* remove this watcher, if others are watching it, they will rearm */
3052 inotify_rm_watch (fs_fd, wd);
3053}
3054
3055static void noinline
3056infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3057{
3058 if (slot < 0)
3059 /* overflow, need to check for all hash slots */
3060 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3061 infy_wd (EV_A_ slot, wd, ev);
3062 else
3063 {
3064 WL w_;
3065
3066 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3067 {
3068 ev_stat *w = (ev_stat *)w_;
3069 w_ = w_->next; /* lets us remove this watcher and all before it */
3070
3071 if (w->wd == wd || wd == -1)
3072 {
3073 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3074 {
3075 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3076 w->wd = -1;
3077 infy_add (EV_A_ w); /* re-add, no matter what */
3078 }
3079
3080 stat_timer_cb (EV_A_ &w->timer, 0);
3081 }
3082 }
3083 }
3084}
3085
3086static void
3087infy_cb (EV_P_ ev_io *w, int revents)
3088{
3089 char buf [EV_INOTIFY_BUFSIZE];
3090 int ofs;
3091 int len = read (fs_fd, buf, sizeof (buf));
3092
3093 for (ofs = 0; ofs < len; )
3094 {
3095 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3096 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3097 ofs += sizeof (struct inotify_event) + ev->len;
3098 }
3099}
3100
3101inline_size void
3102ev_check_2625 (EV_P)
3103{
3104 /* kernels < 2.6.25 are borked
3105 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3106 */
3107 if (ev_linux_version () < 0x020619)
3108 return;
3109
3110 fs_2625 = 1;
3111}
3112
3113inline_size int
3114infy_newfd (void)
3115{
3116#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3117 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3118 if (fd >= 0)
3119 return fd;
3120#endif
3121 return inotify_init ();
3122}
3123
3124inline_size void
3125infy_init (EV_P)
3126{
3127 if (fs_fd != -2)
3128 return;
3129
3130 fs_fd = -1;
3131
3132 ev_check_2625 (EV_A);
3133
3134 fs_fd = infy_newfd ();
3135
3136 if (fs_fd >= 0)
3137 {
3138 fd_intern (fs_fd);
3139 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3140 ev_set_priority (&fs_w, EV_MAXPRI);
3141 ev_io_start (EV_A_ &fs_w);
3142 ev_unref (EV_A);
3143 }
3144}
3145
3146inline_size void
3147infy_fork (EV_P)
3148{
3149 int slot;
3150
3151 if (fs_fd < 0)
3152 return;
3153
3154 ev_ref (EV_A);
3155 ev_io_stop (EV_A_ &fs_w);
3156 close (fs_fd);
3157 fs_fd = infy_newfd ();
3158
3159 if (fs_fd >= 0)
3160 {
3161 fd_intern (fs_fd);
3162 ev_io_set (&fs_w, fs_fd, EV_READ);
3163 ev_io_start (EV_A_ &fs_w);
3164 ev_unref (EV_A);
3165 }
3166
3167 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3168 {
3169 WL w_ = fs_hash [slot].head;
3170 fs_hash [slot].head = 0;
3171
3172 while (w_)
3173 {
3174 ev_stat *w = (ev_stat *)w_;
3175 w_ = w_->next; /* lets us add this watcher */
3176
3177 w->wd = -1;
3178
3179 if (fs_fd >= 0)
3180 infy_add (EV_A_ w); /* re-add, no matter what */
3181 else
3182 {
3183 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3184 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3185 ev_timer_again (EV_A_ &w->timer);
3186 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3187 }
3188 }
3189 }
3190}
3191
3192#endif
3193
3194#ifdef _WIN32
3195# define EV_LSTAT(p,b) _stati64 (p, b)
1474#else 3196#else
1475 struct sigaction sa; 3197# define EV_LSTAT(p,b) lstat (p, b)
1476 sa.sa_handler = sighandler;
1477 sigfillset (&sa.sa_mask);
1478 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1479 sigaction (w->signum, &sa, 0);
1480#endif 3198#endif
1481 }
1482}
1483 3199
1484void 3200void
1485ev_signal_stop (EV_P_ struct ev_signal *w) 3201ev_stat_stat (EV_P_ ev_stat *w)
1486{ 3202{
1487 ev_clear_pending (EV_A_ (W)w); 3203 if (lstat (w->path, &w->attr) < 0)
1488 if (!ev_is_active (w)) 3204 w->attr.st_nlink = 0;
3205 else if (!w->attr.st_nlink)
3206 w->attr.st_nlink = 1;
3207}
3208
3209static void noinline
3210stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3211{
3212 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3213
3214 ev_statdata prev = w->attr;
3215 ev_stat_stat (EV_A_ w);
3216
3217 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3218 if (
3219 prev.st_dev != w->attr.st_dev
3220 || prev.st_ino != w->attr.st_ino
3221 || prev.st_mode != w->attr.st_mode
3222 || prev.st_nlink != w->attr.st_nlink
3223 || prev.st_uid != w->attr.st_uid
3224 || prev.st_gid != w->attr.st_gid
3225 || prev.st_rdev != w->attr.st_rdev
3226 || prev.st_size != w->attr.st_size
3227 || prev.st_atime != w->attr.st_atime
3228 || prev.st_mtime != w->attr.st_mtime
3229 || prev.st_ctime != w->attr.st_ctime
3230 ) {
3231 /* we only update w->prev on actual differences */
3232 /* in case we test more often than invoke the callback, */
3233 /* to ensure that prev is always different to attr */
3234 w->prev = prev;
3235
3236 #if EV_USE_INOTIFY
3237 if (fs_fd >= 0)
3238 {
3239 infy_del (EV_A_ w);
3240 infy_add (EV_A_ w);
3241 ev_stat_stat (EV_A_ w); /* avoid race... */
3242 }
3243 #endif
3244
3245 ev_feed_event (EV_A_ w, EV_STAT);
3246 }
3247}
3248
3249void
3250ev_stat_start (EV_P_ ev_stat *w)
3251{
3252 if (expect_false (ev_is_active (w)))
1489 return; 3253 return;
1490 3254
1491 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3255 ev_stat_stat (EV_A_ w);
3256
3257 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3258 w->interval = MIN_STAT_INTERVAL;
3259
3260 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3261 ev_set_priority (&w->timer, ev_priority (w));
3262
3263#if EV_USE_INOTIFY
3264 infy_init (EV_A);
3265
3266 if (fs_fd >= 0)
3267 infy_add (EV_A_ w);
3268 else
3269#endif
3270 {
3271 ev_timer_again (EV_A_ &w->timer);
3272 ev_unref (EV_A);
3273 }
3274
3275 ev_start (EV_A_ (W)w, 1);
3276
3277 EV_FREQUENT_CHECK;
3278}
3279
3280void
3281ev_stat_stop (EV_P_ ev_stat *w)
3282{
3283 clear_pending (EV_A_ (W)w);
3284 if (expect_false (!ev_is_active (w)))
3285 return;
3286
3287 EV_FREQUENT_CHECK;
3288
3289#if EV_USE_INOTIFY
3290 infy_del (EV_A_ w);
3291#endif
3292
3293 if (ev_is_active (&w->timer))
3294 {
3295 ev_ref (EV_A);
3296 ev_timer_stop (EV_A_ &w->timer);
3297 }
3298
1492 ev_stop (EV_A_ (W)w); 3299 ev_stop (EV_A_ (W)w);
1493 3300
1494 if (!signals [w->signum - 1].head) 3301 EV_FREQUENT_CHECK;
1495 signal (w->signum, SIG_DFL);
1496} 3302}
3303#endif
1497 3304
3305#if EV_IDLE_ENABLE
1498void 3306void
1499ev_child_start (EV_P_ struct ev_child *w) 3307ev_idle_start (EV_P_ ev_idle *w)
1500{ 3308{
1501#if EV_MULTIPLICITY
1502 assert (("child watchers are only supported in the default loop", loop == default_loop));
1503#endif
1504 if (ev_is_active (w)) 3309 if (expect_false (ev_is_active (w)))
1505 return; 3310 return;
1506 3311
3312 pri_adjust (EV_A_ (W)w);
3313
3314 EV_FREQUENT_CHECK;
3315
3316 {
3317 int active = ++idlecnt [ABSPRI (w)];
3318
3319 ++idleall;
3320 ev_start (EV_A_ (W)w, active);
3321
3322 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3323 idles [ABSPRI (w)][active - 1] = w;
3324 }
3325
3326 EV_FREQUENT_CHECK;
3327}
3328
3329void
3330ev_idle_stop (EV_P_ ev_idle *w)
3331{
3332 clear_pending (EV_A_ (W)w);
3333 if (expect_false (!ev_is_active (w)))
3334 return;
3335
3336 EV_FREQUENT_CHECK;
3337
3338 {
3339 int active = ev_active (w);
3340
3341 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3342 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3343
3344 ev_stop (EV_A_ (W)w);
3345 --idleall;
3346 }
3347
3348 EV_FREQUENT_CHECK;
3349}
3350#endif
3351
3352#if EV_PREPARE_ENABLE
3353void
3354ev_prepare_start (EV_P_ ev_prepare *w)
3355{
3356 if (expect_false (ev_is_active (w)))
3357 return;
3358
3359 EV_FREQUENT_CHECK;
3360
3361 ev_start (EV_A_ (W)w, ++preparecnt);
3362 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3363 prepares [preparecnt - 1] = w;
3364
3365 EV_FREQUENT_CHECK;
3366}
3367
3368void
3369ev_prepare_stop (EV_P_ ev_prepare *w)
3370{
3371 clear_pending (EV_A_ (W)w);
3372 if (expect_false (!ev_is_active (w)))
3373 return;
3374
3375 EV_FREQUENT_CHECK;
3376
3377 {
3378 int active = ev_active (w);
3379
3380 prepares [active - 1] = prepares [--preparecnt];
3381 ev_active (prepares [active - 1]) = active;
3382 }
3383
3384 ev_stop (EV_A_ (W)w);
3385
3386 EV_FREQUENT_CHECK;
3387}
3388#endif
3389
3390#if EV_CHECK_ENABLE
3391void
3392ev_check_start (EV_P_ ev_check *w)
3393{
3394 if (expect_false (ev_is_active (w)))
3395 return;
3396
3397 EV_FREQUENT_CHECK;
3398
3399 ev_start (EV_A_ (W)w, ++checkcnt);
3400 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3401 checks [checkcnt - 1] = w;
3402
3403 EV_FREQUENT_CHECK;
3404}
3405
3406void
3407ev_check_stop (EV_P_ ev_check *w)
3408{
3409 clear_pending (EV_A_ (W)w);
3410 if (expect_false (!ev_is_active (w)))
3411 return;
3412
3413 EV_FREQUENT_CHECK;
3414
3415 {
3416 int active = ev_active (w);
3417
3418 checks [active - 1] = checks [--checkcnt];
3419 ev_active (checks [active - 1]) = active;
3420 }
3421
3422 ev_stop (EV_A_ (W)w);
3423
3424 EV_FREQUENT_CHECK;
3425}
3426#endif
3427
3428#if EV_EMBED_ENABLE
3429void noinline
3430ev_embed_sweep (EV_P_ ev_embed *w)
3431{
3432 ev_run (w->other, EVRUN_NOWAIT);
3433}
3434
3435static void
3436embed_io_cb (EV_P_ ev_io *io, int revents)
3437{
3438 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3439
3440 if (ev_cb (w))
3441 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3442 else
3443 ev_run (w->other, EVRUN_NOWAIT);
3444}
3445
3446static void
3447embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3448{
3449 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3450
3451 {
3452 EV_P = w->other;
3453
3454 while (fdchangecnt)
3455 {
3456 fd_reify (EV_A);
3457 ev_run (EV_A_ EVRUN_NOWAIT);
3458 }
3459 }
3460}
3461
3462static void
3463embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3464{
3465 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3466
3467 ev_embed_stop (EV_A_ w);
3468
3469 {
3470 EV_P = w->other;
3471
3472 ev_loop_fork (EV_A);
3473 ev_run (EV_A_ EVRUN_NOWAIT);
3474 }
3475
3476 ev_embed_start (EV_A_ w);
3477}
3478
3479#if 0
3480static void
3481embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3482{
3483 ev_idle_stop (EV_A_ idle);
3484}
3485#endif
3486
3487void
3488ev_embed_start (EV_P_ ev_embed *w)
3489{
3490 if (expect_false (ev_is_active (w)))
3491 return;
3492
3493 {
3494 EV_P = w->other;
3495 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3496 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3497 }
3498
3499 EV_FREQUENT_CHECK;
3500
3501 ev_set_priority (&w->io, ev_priority (w));
3502 ev_io_start (EV_A_ &w->io);
3503
3504 ev_prepare_init (&w->prepare, embed_prepare_cb);
3505 ev_set_priority (&w->prepare, EV_MINPRI);
3506 ev_prepare_start (EV_A_ &w->prepare);
3507
3508 ev_fork_init (&w->fork, embed_fork_cb);
3509 ev_fork_start (EV_A_ &w->fork);
3510
3511 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3512
1507 ev_start (EV_A_ (W)w, 1); 3513 ev_start (EV_A_ (W)w, 1);
1508 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1509}
1510 3514
3515 EV_FREQUENT_CHECK;
3516}
3517
1511void 3518void
1512ev_child_stop (EV_P_ struct ev_child *w) 3519ev_embed_stop (EV_P_ ev_embed *w)
1513{ 3520{
1514 ev_clear_pending (EV_A_ (W)w); 3521 clear_pending (EV_A_ (W)w);
1515 if (ev_is_active (w)) 3522 if (expect_false (!ev_is_active (w)))
1516 return; 3523 return;
1517 3524
1518 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3525 EV_FREQUENT_CHECK;
3526
3527 ev_io_stop (EV_A_ &w->io);
3528 ev_prepare_stop (EV_A_ &w->prepare);
3529 ev_fork_stop (EV_A_ &w->fork);
3530
1519 ev_stop (EV_A_ (W)w); 3531 ev_stop (EV_A_ (W)w);
3532
3533 EV_FREQUENT_CHECK;
1520} 3534}
3535#endif
3536
3537#if EV_FORK_ENABLE
3538void
3539ev_fork_start (EV_P_ ev_fork *w)
3540{
3541 if (expect_false (ev_is_active (w)))
3542 return;
3543
3544 EV_FREQUENT_CHECK;
3545
3546 ev_start (EV_A_ (W)w, ++forkcnt);
3547 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3548 forks [forkcnt - 1] = w;
3549
3550 EV_FREQUENT_CHECK;
3551}
3552
3553void
3554ev_fork_stop (EV_P_ ev_fork *w)
3555{
3556 clear_pending (EV_A_ (W)w);
3557 if (expect_false (!ev_is_active (w)))
3558 return;
3559
3560 EV_FREQUENT_CHECK;
3561
3562 {
3563 int active = ev_active (w);
3564
3565 forks [active - 1] = forks [--forkcnt];
3566 ev_active (forks [active - 1]) = active;
3567 }
3568
3569 ev_stop (EV_A_ (W)w);
3570
3571 EV_FREQUENT_CHECK;
3572}
3573#endif
3574
3575#if EV_CLEANUP_ENABLE
3576void
3577ev_cleanup_start (EV_P_ ev_cleanup *w)
3578{
3579 if (expect_false (ev_is_active (w)))
3580 return;
3581
3582 EV_FREQUENT_CHECK;
3583
3584 ev_start (EV_A_ (W)w, ++cleanupcnt);
3585 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3586 cleanups [cleanupcnt - 1] = w;
3587
3588 EV_FREQUENT_CHECK;
3589}
3590
3591void
3592ev_cleanup_stop (EV_P_ ev_cleanup *w)
3593{
3594 clear_pending (EV_A_ (W)w);
3595 if (expect_false (!ev_is_active (w)))
3596 return;
3597
3598 EV_FREQUENT_CHECK;
3599
3600 {
3601 int active = ev_active (w);
3602
3603 cleanups [active - 1] = cleanups [--cleanupcnt];
3604 ev_active (cleanups [active - 1]) = active;
3605 }
3606
3607 ev_stop (EV_A_ (W)w);
3608
3609 EV_FREQUENT_CHECK;
3610}
3611#endif
3612
3613#if EV_ASYNC_ENABLE
3614void
3615ev_async_start (EV_P_ ev_async *w)
3616{
3617 if (expect_false (ev_is_active (w)))
3618 return;
3619
3620 w->sent = 0;
3621
3622 evpipe_init (EV_A);
3623
3624 EV_FREQUENT_CHECK;
3625
3626 ev_start (EV_A_ (W)w, ++asynccnt);
3627 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3628 asyncs [asynccnt - 1] = w;
3629
3630 EV_FREQUENT_CHECK;
3631}
3632
3633void
3634ev_async_stop (EV_P_ ev_async *w)
3635{
3636 clear_pending (EV_A_ (W)w);
3637 if (expect_false (!ev_is_active (w)))
3638 return;
3639
3640 EV_FREQUENT_CHECK;
3641
3642 {
3643 int active = ev_active (w);
3644
3645 asyncs [active - 1] = asyncs [--asynccnt];
3646 ev_active (asyncs [active - 1]) = active;
3647 }
3648
3649 ev_stop (EV_A_ (W)w);
3650
3651 EV_FREQUENT_CHECK;
3652}
3653
3654void
3655ev_async_send (EV_P_ ev_async *w)
3656{
3657 w->sent = 1;
3658 evpipe_write (EV_A_ &async_pending);
3659}
3660#endif
1521 3661
1522/*****************************************************************************/ 3662/*****************************************************************************/
1523 3663
1524struct ev_once 3664struct ev_once
1525{ 3665{
1526 struct ev_io io; 3666 ev_io io;
1527 struct ev_timer to; 3667 ev_timer to;
1528 void (*cb)(int revents, void *arg); 3668 void (*cb)(int revents, void *arg);
1529 void *arg; 3669 void *arg;
1530}; 3670};
1531 3671
1532static void 3672static void
1533once_cb (EV_P_ struct ev_once *once, int revents) 3673once_cb (EV_P_ struct ev_once *once, int revents)
1534{ 3674{
1535 void (*cb)(int revents, void *arg) = once->cb; 3675 void (*cb)(int revents, void *arg) = once->cb;
1536 void *arg = once->arg; 3676 void *arg = once->arg;
1537 3677
1538 ev_io_stop (EV_A_ &once->io); 3678 ev_io_stop (EV_A_ &once->io);
1539 ev_timer_stop (EV_A_ &once->to); 3679 ev_timer_stop (EV_A_ &once->to);
1540 ev_free (once); 3680 ev_free (once);
1541 3681
1542 cb (revents, arg); 3682 cb (revents, arg);
1543} 3683}
1544 3684
1545static void 3685static void
1546once_cb_io (EV_P_ struct ev_io *w, int revents) 3686once_cb_io (EV_P_ ev_io *w, int revents)
1547{ 3687{
1548 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3688 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3689
3690 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1549} 3691}
1550 3692
1551static void 3693static void
1552once_cb_to (EV_P_ struct ev_timer *w, int revents) 3694once_cb_to (EV_P_ ev_timer *w, int revents)
1553{ 3695{
1554 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3696 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3697
3698 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1555} 3699}
1556 3700
1557void 3701void
1558ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3702ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1559{ 3703{
1560 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3704 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1561 3705
1562 if (!once) 3706 if (expect_false (!once))
3707 {
1563 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3708 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1564 else 3709 return;
1565 { 3710 }
3711
1566 once->cb = cb; 3712 once->cb = cb;
1567 once->arg = arg; 3713 once->arg = arg;
1568 3714
1569 ev_watcher_init (&once->io, once_cb_io); 3715 ev_init (&once->io, once_cb_io);
1570 if (fd >= 0) 3716 if (fd >= 0)
3717 {
3718 ev_io_set (&once->io, fd, events);
3719 ev_io_start (EV_A_ &once->io);
3720 }
3721
3722 ev_init (&once->to, once_cb_to);
3723 if (timeout >= 0.)
3724 {
3725 ev_timer_set (&once->to, timeout, 0.);
3726 ev_timer_start (EV_A_ &once->to);
3727 }
3728}
3729
3730/*****************************************************************************/
3731
3732#if EV_WALK_ENABLE
3733void
3734ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3735{
3736 int i, j;
3737 ev_watcher_list *wl, *wn;
3738
3739 if (types & (EV_IO | EV_EMBED))
3740 for (i = 0; i < anfdmax; ++i)
3741 for (wl = anfds [i].head; wl; )
1571 { 3742 {
1572 ev_io_set (&once->io, fd, events); 3743 wn = wl->next;
1573 ev_io_start (EV_A_ &once->io); 3744
3745#if EV_EMBED_ENABLE
3746 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3747 {
3748 if (types & EV_EMBED)
3749 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3750 }
3751 else
3752#endif
3753#if EV_USE_INOTIFY
3754 if (ev_cb ((ev_io *)wl) == infy_cb)
3755 ;
3756 else
3757#endif
3758 if ((ev_io *)wl != &pipe_w)
3759 if (types & EV_IO)
3760 cb (EV_A_ EV_IO, wl);
3761
3762 wl = wn;
1574 } 3763 }
1575 3764
1576 ev_watcher_init (&once->to, once_cb_to); 3765 if (types & (EV_TIMER | EV_STAT))
1577 if (timeout >= 0.) 3766 for (i = timercnt + HEAP0; i-- > HEAP0; )
3767#if EV_STAT_ENABLE
3768 /*TODO: timer is not always active*/
3769 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1578 { 3770 {
1579 ev_timer_set (&once->to, timeout, 0.); 3771 if (types & EV_STAT)
1580 ev_timer_start (EV_A_ &once->to); 3772 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1581 } 3773 }
1582 } 3774 else
1583} 3775#endif
3776 if (types & EV_TIMER)
3777 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1584 3778
3779#if EV_PERIODIC_ENABLE
3780 if (types & EV_PERIODIC)
3781 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3782 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3783#endif
3784
3785#if EV_IDLE_ENABLE
3786 if (types & EV_IDLE)
3787 for (j = NUMPRI; i--; )
3788 for (i = idlecnt [j]; i--; )
3789 cb (EV_A_ EV_IDLE, idles [j][i]);
3790#endif
3791
3792#if EV_FORK_ENABLE
3793 if (types & EV_FORK)
3794 for (i = forkcnt; i--; )
3795 if (ev_cb (forks [i]) != embed_fork_cb)
3796 cb (EV_A_ EV_FORK, forks [i]);
3797#endif
3798
3799#if EV_ASYNC_ENABLE
3800 if (types & EV_ASYNC)
3801 for (i = asynccnt; i--; )
3802 cb (EV_A_ EV_ASYNC, asyncs [i]);
3803#endif
3804
3805#if EV_PREPARE_ENABLE
3806 if (types & EV_PREPARE)
3807 for (i = preparecnt; i--; )
3808# if EV_EMBED_ENABLE
3809 if (ev_cb (prepares [i]) != embed_prepare_cb)
3810# endif
3811 cb (EV_A_ EV_PREPARE, prepares [i]);
3812#endif
3813
3814#if EV_CHECK_ENABLE
3815 if (types & EV_CHECK)
3816 for (i = checkcnt; i--; )
3817 cb (EV_A_ EV_CHECK, checks [i]);
3818#endif
3819
3820#if EV_SIGNAL_ENABLE
3821 if (types & EV_SIGNAL)
3822 for (i = 0; i < EV_NSIG - 1; ++i)
3823 for (wl = signals [i].head; wl; )
3824 {
3825 wn = wl->next;
3826 cb (EV_A_ EV_SIGNAL, wl);
3827 wl = wn;
3828 }
3829#endif
3830
3831#if EV_CHILD_ENABLE
3832 if (types & EV_CHILD)
3833 for (i = (EV_PID_HASHSIZE); i--; )
3834 for (wl = childs [i]; wl; )
3835 {
3836 wn = wl->next;
3837 cb (EV_A_ EV_CHILD, wl);
3838 wl = wn;
3839 }
3840#endif
3841/* EV_STAT 0x00001000 /* stat data changed */
3842/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3843}
3844#endif
3845
3846#if EV_MULTIPLICITY
3847 #include "ev_wrap.h"
3848#endif
3849
3850EV_CPP(})
3851

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