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

Comparing libev/ev.c (file contents):
Revision 1.102 by root, Sun Nov 11 17:56:11 2007 UTC vs.
Revision 1.356 by root, Fri Oct 22 11:21:52 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 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
37# 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
38 61
39# if HAVE_CLOCK_GETTIME 62# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 63# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 64# define EV_USE_MONOTONIC 1
42# endif 65# endif
43# ifndef EV_USE_REALTIME 66# ifndef EV_USE_REALTIME
44# 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
45# endif 75# endif
46# endif 76# endif
47 77
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 78# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 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
50# endif 85# endif
51 86
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 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
53# define EV_USE_POLL 1 93# define EV_USE_SELECT 0
54# endif 94# endif
55 95
56# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 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
57# define EV_USE_EPOLL 1 102# define EV_USE_POLL 0
58# endif 103# endif
59 104
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 106# ifndef EV_USE_EPOLL
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif
109# else
110# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0
62# endif 112# endif
113
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# endif
118# else
119# undef EV_USE_KQUEUE
120# define EV_USE_KQUEUE 0
121# endif
122
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# ifndef EV_USE_PORT
125# define EV_USE_PORT EV_FEATURE_BACKENDS
126# endif
127# else
128# undef EV_USE_PORT
129# define EV_USE_PORT 0
130# endif
63 131
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
64#endif 159#endif
65 160
66#include <math.h> 161#include <math.h>
67#include <stdlib.h> 162#include <stdlib.h>
163#include <string.h>
68#include <fcntl.h> 164#include <fcntl.h>
69#include <stddef.h> 165#include <stddef.h>
70 166
71#include <stdio.h> 167#include <stdio.h>
72 168
73#include <assert.h> 169#include <assert.h>
74#include <errno.h> 170#include <errno.h>
75#include <sys/types.h> 171#include <sys/types.h>
76#include <time.h> 172#include <time.h>
173#include <limits.h>
77 174
78#include <signal.h> 175#include <signal.h>
79
80#ifndef WIN32
81# include <unistd.h>
82# include <sys/time.h>
83# include <sys/wait.h>
84#endif
85/**/
86
87#ifndef EV_USE_MONOTONIC
88# define EV_USE_MONOTONIC 1
89#endif
90
91#ifndef EV_USE_SELECT
92# define EV_USE_SELECT 1
93#endif
94
95#ifndef EV_USE_POLL
96# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
97#endif
98
99#ifndef EV_USE_EPOLL
100# define EV_USE_EPOLL 0
101#endif
102
103#ifndef EV_USE_KQUEUE
104# define EV_USE_KQUEUE 0
105#endif
106
107#ifndef EV_USE_WIN32
108# ifdef WIN32
109# define EV_USE_WIN32 0 /* it does not exist, use select */
110# undef EV_USE_SELECT
111# define EV_USE_SELECT 1
112# else
113# define EV_USE_WIN32 0
114# endif
115#endif
116
117#ifndef EV_USE_REALTIME
118# define EV_USE_REALTIME 1
119#endif
120
121/**/
122
123#ifndef CLOCK_MONOTONIC
124# undef EV_USE_MONOTONIC
125# define EV_USE_MONOTONIC 0
126#endif
127
128#ifndef CLOCK_REALTIME
129# undef EV_USE_REALTIME
130# define EV_USE_REALTIME 0
131#endif
132
133/**/
134
135#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
136#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
137#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
138/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
139 176
140#ifdef EV_H 177#ifdef EV_H
141# include EV_H 178# include EV_H
142#else 179#else
143# include "ev.h" 180# include "ev.h"
144#endif 181#endif
145 182
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
146#if __GNUC__ >= 3 462#if __GNUC__ >= 4
147# define expect(expr,value) __builtin_expect ((expr),(value)) 463# define expect(expr,value) __builtin_expect ((expr),(value))
148# define inline inline 464# define noinline __attribute__ ((noinline))
149#else 465#else
150# define expect(expr,value) (expr) 466# define expect(expr,value) (expr)
151# define inline static 467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif
152#endif 471#endif
153 472
154#define expect_false(expr) expect ((expr) != 0, 0) 473#define expect_false(expr) expect ((expr) != 0, 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 474#define expect_true(expr) expect ((expr) != 0, 1)
475#define inline_size static inline
156 476
477#if EV_FEATURE_CODE
478# define inline_speed static inline
479#else
480# define inline_speed static noinline
481#endif
482
157#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
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif
159 490
491#define EMPTY /* required for microsofts broken pseudo-c compiler */
492#define EMPTY2(a,b) /* used to suppress some warnings */
493
160typedef struct ev_watcher *W; 494typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 495typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 496typedef ev_watcher_time *WT;
163 497
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
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
509#endif
165 510
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
166#ifdef WIN32 521#ifdef _WIN32
167# include "ev_win32.c" 522# include "ev_win32.c"
168#endif 523#endif
169 524
170/*****************************************************************************/ 525/*****************************************************************************/
171 526
527#ifdef __linux
528# include <sys/utsname.h>
529#endif
530
531static unsigned int noinline
532ev_linux_version (void)
533{
534#ifdef __linux
535 struct utsname buf;
536 unsigned int v;
537 int i;
538 char *p = buf.release;
539
540 if (uname (&buf))
541 return 0;
542
543 for (i = 3+1; --i; )
544 {
545 unsigned int c = 0;
546
547 for (;;)
548 {
549 if (*p >= '0' && *p <= '9')
550 c = c * 10 + *p++ - '0';
551 else
552 {
553 p += *p == '.';
554 break;
555 }
556 }
557
558 v = (v << 8) | c;
559 }
560
561 return v;
562#else
563 return 0;
564#endif
565}
566
567/*****************************************************************************/
568
569#if EV_AVOID_STDIO
570static void noinline
571ev_printerr (const char *msg)
572{
573 write (STDERR_FILENO, msg, strlen (msg));
574}
575#endif
576
172static void (*syserr_cb)(const char *msg); 577static void (*syserr_cb)(const char *msg);
173 578
579void
174void ev_set_syserr_cb (void (*cb)(const char *msg)) 580ev_set_syserr_cb (void (*cb)(const char *msg))
175{ 581{
176 syserr_cb = cb; 582 syserr_cb = cb;
177} 583}
178 584
179static void 585static void noinline
180syserr (const char *msg) 586ev_syserr (const char *msg)
181{ 587{
182 if (!msg) 588 if (!msg)
183 msg = "(libev) system error"; 589 msg = "(libev) system error";
184 590
185 if (syserr_cb) 591 if (syserr_cb)
186 syserr_cb (msg); 592 syserr_cb (msg);
187 else 593 else
188 { 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
189 perror (msg); 603 perror (msg);
604#endif
190 abort (); 605 abort ();
191 } 606 }
192} 607}
193 608
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
194static void *(*alloc)(void *ptr, long size); 628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
195 629
630void
196void ev_set_allocator (void *(*cb)(void *ptr, long size)) 631ev_set_allocator (void *(*cb)(void *ptr, long size))
197{ 632{
198 alloc = cb; 633 alloc = cb;
199} 634}
200 635
201static void * 636inline_speed void *
202ev_realloc (void *ptr, long size) 637ev_realloc (void *ptr, long size)
203{ 638{
204 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 639 ptr = alloc (ptr, size);
205 640
206 if (!ptr && size) 641 if (!ptr && size)
207 { 642 {
643#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n");
645#else
208 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
647#endif
209 abort (); 648 abort ();
210 } 649 }
211 650
212 return ptr; 651 return ptr;
213} 652}
… …
215#define ev_malloc(size) ev_realloc (0, (size)) 654#define ev_malloc(size) ev_realloc (0, (size))
216#define ev_free(ptr) ev_realloc ((ptr), 0) 655#define ev_free(ptr) ev_realloc ((ptr), 0)
217 656
218/*****************************************************************************/ 657/*****************************************************************************/
219 658
659/* set in reify when reification needed */
660#define EV_ANFD_REIFY 1
661
662/* file descriptor info structure */
220typedef struct 663typedef struct
221{ 664{
222 WL head; 665 WL head;
223 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 */
224 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
674 SOCKET handle;
675#endif
225} ANFD; 676} ANFD;
226 677
678/* stores the pending event set for a given watcher */
227typedef struct 679typedef struct
228{ 680{
229 W w; 681 W w;
230 int events; 682 int events; /* the pending event set for the given watcher */
231} ANPENDING; 683} ANPENDING;
684
685#if EV_USE_INOTIFY
686/* hash table entry per inotify-id */
687typedef struct
688{
689 WL head;
690} ANFS;
691#endif
692
693/* Heap Entry */
694#if EV_HEAP_CACHE_AT
695 /* a heap element */
696 typedef struct {
697 ev_tstamp at;
698 WT w;
699 } ANHE;
700
701 #define ANHE_w(he) (he).w /* access watcher, read-write */
702 #define ANHE_at(he) (he).at /* access cached at, read-only */
703 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
704#else
705 /* a heap element */
706 typedef WT ANHE;
707
708 #define ANHE_w(he) (he)
709 #define ANHE_at(he) (he)->at
710 #define ANHE_at_cache(he)
711#endif
232 712
233#if EV_MULTIPLICITY 713#if EV_MULTIPLICITY
234 714
235 struct ev_loop 715 struct ev_loop
236 { 716 {
… …
240 #include "ev_vars.h" 720 #include "ev_vars.h"
241 #undef VAR 721 #undef VAR
242 }; 722 };
243 #include "ev_wrap.h" 723 #include "ev_wrap.h"
244 724
245 struct ev_loop default_loop_struct; 725 static struct ev_loop default_loop_struct;
246 static struct ev_loop *default_loop; 726 struct ev_loop *ev_default_loop_ptr;
247 727
248#else 728#else
249 729
250 ev_tstamp ev_rt_now; 730 ev_tstamp ev_rt_now;
251 #define VAR(name,decl) static decl; 731 #define VAR(name,decl) static decl;
252 #include "ev_vars.h" 732 #include "ev_vars.h"
253 #undef VAR 733 #undef VAR
254 734
255 static int default_loop; 735 static int ev_default_loop_ptr;
256 736
257#endif 737#endif
738
739#if EV_FEATURE_API
740# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
741# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
742# define EV_INVOKE_PENDING invoke_cb (EV_A)
743#else
744# define EV_RELEASE_CB (void)0
745# define EV_ACQUIRE_CB (void)0
746# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
747#endif
748
749#define EVBREAK_RECURSE 0x80
258 750
259/*****************************************************************************/ 751/*****************************************************************************/
260 752
753#ifndef EV_HAVE_EV_TIME
261ev_tstamp 754ev_tstamp
262ev_time (void) 755ev_time (void)
263{ 756{
264#if EV_USE_REALTIME 757#if EV_USE_REALTIME
758 if (expect_true (have_realtime))
759 {
265 struct timespec ts; 760 struct timespec ts;
266 clock_gettime (CLOCK_REALTIME, &ts); 761 clock_gettime (CLOCK_REALTIME, &ts);
267 return ts.tv_sec + ts.tv_nsec * 1e-9; 762 return ts.tv_sec + ts.tv_nsec * 1e-9;
268#else 763 }
764#endif
765
269 struct timeval tv; 766 struct timeval tv;
270 gettimeofday (&tv, 0); 767 gettimeofday (&tv, 0);
271 return tv.tv_sec + tv.tv_usec * 1e-6; 768 return tv.tv_sec + tv.tv_usec * 1e-6;
272#endif
273} 769}
770#endif
274 771
275inline ev_tstamp 772inline_size ev_tstamp
276get_clock (void) 773get_clock (void)
277{ 774{
278#if EV_USE_MONOTONIC 775#if EV_USE_MONOTONIC
279 if (expect_true (have_monotonic)) 776 if (expect_true (have_monotonic))
280 { 777 {
… …
293{ 790{
294 return ev_rt_now; 791 return ev_rt_now;
295} 792}
296#endif 793#endif
297 794
298#define array_roundsize(type,n) ((n) | 4 & ~3) 795void
796ev_sleep (ev_tstamp delay)
797{
798 if (delay > 0.)
799 {
800#if EV_USE_NANOSLEEP
801 struct timespec ts;
802
803 EV_TS_SET (ts, delay);
804 nanosleep (&ts, 0);
805#elif defined(_WIN32)
806 Sleep ((unsigned long)(delay * 1e3));
807#else
808 struct timeval tv;
809
810 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
811 /* something not guaranteed by newer posix versions, but guaranteed */
812 /* by older ones */
813 EV_TV_SET (tv, delay);
814 select (0, 0, 0, 0, &tv);
815#endif
816 }
817}
818
819/*****************************************************************************/
820
821#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
822
823/* find a suitable new size for the given array, */
824/* hopefully by rounding to a nice-to-malloc size */
825inline_size int
826array_nextsize (int elem, int cur, int cnt)
827{
828 int ncur = cur + 1;
829
830 do
831 ncur <<= 1;
832 while (cnt > ncur);
833
834 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
835 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
836 {
837 ncur *= elem;
838 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
839 ncur = ncur - sizeof (void *) * 4;
840 ncur /= elem;
841 }
842
843 return ncur;
844}
845
846static noinline void *
847array_realloc (int elem, void *base, int *cur, int cnt)
848{
849 *cur = array_nextsize (elem, *cur, cnt);
850 return ev_realloc (base, elem * *cur);
851}
852
853#define array_init_zero(base,count) \
854 memset ((void *)(base), 0, sizeof (*(base)) * (count))
299 855
300#define array_needsize(type,base,cur,cnt,init) \ 856#define array_needsize(type,base,cur,cnt,init) \
301 if (expect_false ((cnt) > cur)) \ 857 if (expect_false ((cnt) > (cur))) \
302 { \ 858 { \
303 int newcnt = cur; \ 859 int ocur_ = (cur); \
304 do \ 860 (base) = (type *)array_realloc \
305 { \ 861 (sizeof (type), (base), &(cur), (cnt)); \
306 newcnt = array_roundsize (type, newcnt << 1); \ 862 init ((base) + (ocur_), (cur) - ocur_); \
307 } \
308 while ((cnt) > newcnt); \
309 \
310 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
311 init (base + cur, newcnt - cur); \
312 cur = newcnt; \
313 } 863 }
314 864
865#if 0
315#define array_slim(type,stem) \ 866#define array_slim(type,stem) \
316 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 867 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
317 { \ 868 { \
318 stem ## max = array_roundsize (stem ## cnt >> 1); \ 869 stem ## max = array_roundsize (stem ## cnt >> 1); \
319 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 870 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
320 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 871 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
321 } 872 }
322 873#endif
323/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
324/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
325#define array_free_microshit(stem) \
326 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
327 874
328#define array_free(stem, idx) \ 875#define array_free(stem, idx) \
329 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 876 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
330 877
331/*****************************************************************************/ 878/*****************************************************************************/
332 879
333static void 880/* dummy callback for pending events */
334anfds_init (ANFD *base, int count) 881static void noinline
882pendingcb (EV_P_ ev_prepare *w, int revents)
335{ 883{
336 while (count--)
337 {
338 base->head = 0;
339 base->events = EV_NONE;
340 base->reify = 0;
341
342 ++base;
343 }
344} 884}
345 885
346void 886void noinline
347ev_feed_event (EV_P_ void *w, int revents) 887ev_feed_event (EV_P_ void *w, int revents)
348{ 888{
349 W w_ = (W)w; 889 W w_ = (W)w;
890 int pri = ABSPRI (w_);
350 891
351 if (w_->pending) 892 if (expect_false (w_->pending))
893 pendings [pri][w_->pending - 1].events |= revents;
894 else
352 { 895 {
896 w_->pending = ++pendingcnt [pri];
897 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
898 pendings [pri][w_->pending - 1].w = w_;
353 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 899 pendings [pri][w_->pending - 1].events = revents;
354 return;
355 } 900 }
356
357 w_->pending = ++pendingcnt [ABSPRI (w_)];
358 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
359 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
360 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
361} 901}
362 902
363static void 903inline_speed void
904feed_reverse (EV_P_ W w)
905{
906 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
907 rfeeds [rfeedcnt++] = w;
908}
909
910inline_size void
911feed_reverse_done (EV_P_ int revents)
912{
913 do
914 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
915 while (rfeedcnt);
916}
917
918inline_speed void
364queue_events (EV_P_ W *events, int eventcnt, int type) 919queue_events (EV_P_ W *events, int eventcnt, int type)
365{ 920{
366 int i; 921 int i;
367 922
368 for (i = 0; i < eventcnt; ++i) 923 for (i = 0; i < eventcnt; ++i)
369 ev_feed_event (EV_A_ events [i], type); 924 ev_feed_event (EV_A_ events [i], type);
370} 925}
371 926
927/*****************************************************************************/
928
372inline void 929inline_speed void
373fd_event (EV_P_ int fd, int revents) 930fd_event_nocheck (EV_P_ int fd, int revents)
374{ 931{
375 ANFD *anfd = anfds + fd; 932 ANFD *anfd = anfds + fd;
376 struct ev_io *w; 933 ev_io *w;
377 934
378 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 935 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
379 { 936 {
380 int ev = w->events & revents; 937 int ev = w->events & revents;
381 938
382 if (ev) 939 if (ev)
383 ev_feed_event (EV_A_ (W)w, ev); 940 ev_feed_event (EV_A_ (W)w, ev);
384 } 941 }
385} 942}
386 943
944/* do not submit kernel events for fds that have reify set */
945/* because that means they changed while we were polling for new events */
946inline_speed void
947fd_event (EV_P_ int fd, int revents)
948{
949 ANFD *anfd = anfds + fd;
950
951 if (expect_true (!anfd->reify))
952 fd_event_nocheck (EV_A_ fd, revents);
953}
954
387void 955void
388ev_feed_fd_event (EV_P_ int fd, int revents) 956ev_feed_fd_event (EV_P_ int fd, int revents)
389{ 957{
958 if (fd >= 0 && fd < anfdmax)
390 fd_event (EV_A_ fd, revents); 959 fd_event_nocheck (EV_A_ fd, revents);
391} 960}
392 961
393/*****************************************************************************/ 962/* make sure the external fd watch events are in-sync */
394 963/* with the kernel/libev internal state */
395static void 964inline_size void
396fd_reify (EV_P) 965fd_reify (EV_P)
397{ 966{
398 int i; 967 int i;
399 968
400 for (i = 0; i < fdchangecnt; ++i) 969 for (i = 0; i < fdchangecnt; ++i)
401 { 970 {
402 int fd = fdchanges [i]; 971 int fd = fdchanges [i];
403 ANFD *anfd = anfds + fd; 972 ANFD *anfd = anfds + fd;
404 struct ev_io *w; 973 ev_io *w;
405 974
406 int events = 0; 975 unsigned char o_events = anfd->events;
976 unsigned char o_reify = anfd->reify;
407 977
408 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
409 events |= w->events;
410
411 anfd->reify = 0; 978 anfd->reify = 0;
412 979
413 method_modify (EV_A_ fd, anfd->events, events); 980#if EV_SELECT_IS_WINSOCKET
981 if (o_reify & EV__IOFDSET)
982 {
983 unsigned long arg;
984 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
985 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
986 }
987#endif
988
989 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
990 {
414 anfd->events = events; 991 anfd->events = 0;
992
993 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
994 anfd->events |= (unsigned char)w->events;
995
996 if (o_events != anfd->events)
997 o_reify = EV__IOFDSET; /* actually |= */
998 }
999
1000 if (o_reify & EV__IOFDSET)
1001 backend_modify (EV_A_ fd, o_events, anfd->events);
415 } 1002 }
416 1003
417 fdchangecnt = 0; 1004 fdchangecnt = 0;
418} 1005}
419 1006
420static void 1007/* something about the given fd changed */
1008inline_size void
421fd_change (EV_P_ int fd) 1009fd_change (EV_P_ int fd, int flags)
422{ 1010{
423 if (anfds [fd].reify) 1011 unsigned char reify = anfds [fd].reify;
424 return;
425
426 anfds [fd].reify = 1; 1012 anfds [fd].reify |= flags;
427 1013
1014 if (expect_true (!reify))
1015 {
428 ++fdchangecnt; 1016 ++fdchangecnt;
429 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 1017 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
430 fdchanges [fdchangecnt - 1] = fd; 1018 fdchanges [fdchangecnt - 1] = fd;
1019 }
431} 1020}
432 1021
433static void 1022/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1023inline_speed void
434fd_kill (EV_P_ int fd) 1024fd_kill (EV_P_ int fd)
435{ 1025{
436 struct ev_io *w; 1026 ev_io *w;
437 1027
438 while ((w = (struct ev_io *)anfds [fd].head)) 1028 while ((w = (ev_io *)anfds [fd].head))
439 { 1029 {
440 ev_io_stop (EV_A_ w); 1030 ev_io_stop (EV_A_ w);
441 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1031 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
442 } 1032 }
443} 1033}
444 1034
445static int 1035/* check whether the given fd is actually valid, for error recovery */
1036inline_size int
446fd_valid (int fd) 1037fd_valid (int fd)
447{ 1038{
448#ifdef WIN32 1039#ifdef _WIN32
449 return !!win32_get_osfhandle (fd); 1040 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
450#else 1041#else
451 return fcntl (fd, F_GETFD) != -1; 1042 return fcntl (fd, F_GETFD) != -1;
452#endif 1043#endif
453} 1044}
454 1045
455/* called on EBADF to verify fds */ 1046/* called on EBADF to verify fds */
456static void 1047static void noinline
457fd_ebadf (EV_P) 1048fd_ebadf (EV_P)
458{ 1049{
459 int fd; 1050 int fd;
460 1051
461 for (fd = 0; fd < anfdmax; ++fd) 1052 for (fd = 0; fd < anfdmax; ++fd)
462 if (anfds [fd].events) 1053 if (anfds [fd].events)
463 if (!fd_valid (fd) == -1 && errno == EBADF) 1054 if (!fd_valid (fd) && errno == EBADF)
464 fd_kill (EV_A_ fd); 1055 fd_kill (EV_A_ fd);
465} 1056}
466 1057
467/* called on ENOMEM in select/poll to kill some fds and retry */ 1058/* called on ENOMEM in select/poll to kill some fds and retry */
468static void 1059static void noinline
469fd_enomem (EV_P) 1060fd_enomem (EV_P)
470{ 1061{
471 int fd; 1062 int fd;
472 1063
473 for (fd = anfdmax; fd--; ) 1064 for (fd = anfdmax; fd--; )
474 if (anfds [fd].events) 1065 if (anfds [fd].events)
475 { 1066 {
476 fd_kill (EV_A_ fd); 1067 fd_kill (EV_A_ fd);
477 return; 1068 break;
478 } 1069 }
479} 1070}
480 1071
481/* usually called after fork if method needs to re-arm all fds from scratch */ 1072/* usually called after fork if backend needs to re-arm all fds from scratch */
482static void 1073static void noinline
483fd_rearm_all (EV_P) 1074fd_rearm_all (EV_P)
484{ 1075{
485 int fd; 1076 int fd;
486 1077
487 /* this should be highly optimised to not do anything but set a flag */
488 for (fd = 0; fd < anfdmax; ++fd) 1078 for (fd = 0; fd < anfdmax; ++fd)
489 if (anfds [fd].events) 1079 if (anfds [fd].events)
490 { 1080 {
491 anfds [fd].events = 0; 1081 anfds [fd].events = 0;
492 fd_change (EV_A_ fd); 1082 anfds [fd].emask = 0;
1083 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
493 } 1084 }
494} 1085}
495 1086
1087/* used to prepare libev internal fd's */
1088/* this is not fork-safe */
1089inline_speed void
1090fd_intern (int fd)
1091{
1092#ifdef _WIN32
1093 unsigned long arg = 1;
1094 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1095#else
1096 fcntl (fd, F_SETFD, FD_CLOEXEC);
1097 fcntl (fd, F_SETFL, O_NONBLOCK);
1098#endif
1099}
1100
496/*****************************************************************************/ 1101/*****************************************************************************/
497 1102
1103/*
1104 * the heap functions want a real array index. array index 0 is guaranteed to not
1105 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1106 * the branching factor of the d-tree.
1107 */
1108
1109/*
1110 * at the moment we allow libev the luxury of two heaps,
1111 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1112 * which is more cache-efficient.
1113 * the difference is about 5% with 50000+ watchers.
1114 */
1115#if EV_USE_4HEAP
1116
1117#define DHEAP 4
1118#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1119#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1120#define UPHEAP_DONE(p,k) ((p) == (k))
1121
1122/* away from the root */
1123inline_speed void
1124downheap (ANHE *heap, int N, int k)
1125{
1126 ANHE he = heap [k];
1127 ANHE *E = heap + N + HEAP0;
1128
1129 for (;;)
1130 {
1131 ev_tstamp minat;
1132 ANHE *minpos;
1133 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1134
1135 /* find minimum child */
1136 if (expect_true (pos + DHEAP - 1 < E))
1137 {
1138 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1139 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1140 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1141 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1142 }
1143 else if (pos < E)
1144 {
1145 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1146 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1147 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1148 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1149 }
1150 else
1151 break;
1152
1153 if (ANHE_at (he) <= minat)
1154 break;
1155
1156 heap [k] = *minpos;
1157 ev_active (ANHE_w (*minpos)) = k;
1158
1159 k = minpos - heap;
1160 }
1161
1162 heap [k] = he;
1163 ev_active (ANHE_w (he)) = k;
1164}
1165
1166#else /* 4HEAP */
1167
1168#define HEAP0 1
1169#define HPARENT(k) ((k) >> 1)
1170#define UPHEAP_DONE(p,k) (!(p))
1171
1172/* away from the root */
1173inline_speed void
1174downheap (ANHE *heap, int N, int k)
1175{
1176 ANHE he = heap [k];
1177
1178 for (;;)
1179 {
1180 int c = k << 1;
1181
1182 if (c >= N + HEAP0)
1183 break;
1184
1185 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1186 ? 1 : 0;
1187
1188 if (ANHE_at (he) <= ANHE_at (heap [c]))
1189 break;
1190
1191 heap [k] = heap [c];
1192 ev_active (ANHE_w (heap [k])) = k;
1193
1194 k = c;
1195 }
1196
1197 heap [k] = he;
1198 ev_active (ANHE_w (he)) = k;
1199}
1200#endif
1201
1202/* towards the root */
1203inline_speed void
1204upheap (ANHE *heap, int k)
1205{
1206 ANHE he = heap [k];
1207
1208 for (;;)
1209 {
1210 int p = HPARENT (k);
1211
1212 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1213 break;
1214
1215 heap [k] = heap [p];
1216 ev_active (ANHE_w (heap [k])) = k;
1217 k = p;
1218 }
1219
1220 heap [k] = he;
1221 ev_active (ANHE_w (he)) = k;
1222}
1223
1224/* move an element suitably so it is in a correct place */
1225inline_size void
1226adjustheap (ANHE *heap, int N, int k)
1227{
1228 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1229 upheap (heap, k);
1230 else
1231 downheap (heap, N, k);
1232}
1233
1234/* rebuild the heap: this function is used only once and executed rarely */
1235inline_size void
1236reheap (ANHE *heap, int N)
1237{
1238 int i;
1239
1240 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1241 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1242 for (i = 0; i < N; ++i)
1243 upheap (heap, i + HEAP0);
1244}
1245
1246/*****************************************************************************/
1247
1248/* associate signal watchers to a signal signal */
1249typedef struct
1250{
1251 EV_ATOMIC_T pending;
1252#if EV_MULTIPLICITY
1253 EV_P;
1254#endif
1255 WL head;
1256} ANSIG;
1257
1258static ANSIG signals [EV_NSIG - 1];
1259
1260/*****************************************************************************/
1261
1262#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1263
1264static void noinline
1265evpipe_init (EV_P)
1266{
1267 if (!ev_is_active (&pipe_w))
1268 {
1269# if EV_USE_EVENTFD
1270 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1271 if (evfd < 0 && errno == EINVAL)
1272 evfd = eventfd (0, 0);
1273
1274 if (evfd >= 0)
1275 {
1276 evpipe [0] = -1;
1277 fd_intern (evfd); /* doing it twice doesn't hurt */
1278 ev_io_set (&pipe_w, evfd, EV_READ);
1279 }
1280 else
1281# endif
1282 {
1283 while (pipe (evpipe))
1284 ev_syserr ("(libev) error creating signal/async pipe");
1285
1286 fd_intern (evpipe [0]);
1287 fd_intern (evpipe [1]);
1288 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1289 }
1290
1291 ev_io_start (EV_A_ &pipe_w);
1292 ev_unref (EV_A); /* watcher should not keep loop alive */
1293 }
1294}
1295
1296inline_size void
1297evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1298{
1299 if (!*flag)
1300 {
1301 int old_errno = errno; /* save errno because write might clobber it */
1302 char dummy;
1303
1304 *flag = 1;
1305
1306#if EV_USE_EVENTFD
1307 if (evfd >= 0)
1308 {
1309 uint64_t counter = 1;
1310 write (evfd, &counter, sizeof (uint64_t));
1311 }
1312 else
1313#endif
1314 /* win32 people keep sending patches that change this write() to send() */
1315 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1316 /* so when you think this write should be a send instead, please find out */
1317 /* where your send() is from - it's definitely not the microsoft send, and */
1318 /* tell me. thank you. */
1319 write (evpipe [1], &dummy, 1);
1320
1321 errno = old_errno;
1322 }
1323}
1324
1325/* called whenever the libev signal pipe */
1326/* got some events (signal, async) */
498static void 1327static void
499upheap (WT *heap, int k) 1328pipecb (EV_P_ ev_io *iow, int revents)
500{ 1329{
501 WT w = heap [k]; 1330 int i;
502 1331
503 while (k && heap [k >> 1]->at > w->at) 1332#if EV_USE_EVENTFD
504 { 1333 if (evfd >= 0)
505 heap [k] = heap [k >> 1];
506 ((W)heap [k])->active = k + 1;
507 k >>= 1;
508 } 1334 {
1335 uint64_t counter;
1336 read (evfd, &counter, sizeof (uint64_t));
1337 }
1338 else
1339#endif
1340 {
1341 char dummy;
1342 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1343 read (evpipe [0], &dummy, 1);
1344 }
509 1345
510 heap [k] = w; 1346 if (sig_pending)
511 ((W)heap [k])->active = k + 1; 1347 {
1348 sig_pending = 0;
512 1349
1350 for (i = EV_NSIG - 1; i--; )
1351 if (expect_false (signals [i].pending))
1352 ev_feed_signal_event (EV_A_ i + 1);
1353 }
1354
1355#if EV_ASYNC_ENABLE
1356 if (async_pending)
1357 {
1358 async_pending = 0;
1359
1360 for (i = asynccnt; i--; )
1361 if (asyncs [i]->sent)
1362 {
1363 asyncs [i]->sent = 0;
1364 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1365 }
1366 }
1367#endif
513} 1368}
1369
1370/*****************************************************************************/
514 1371
515static void 1372static void
516downheap (WT *heap, int N, int k)
517{
518 WT w = heap [k];
519
520 while (k < (N >> 1))
521 {
522 int j = k << 1;
523
524 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
525 ++j;
526
527 if (w->at <= heap [j]->at)
528 break;
529
530 heap [k] = heap [j];
531 ((W)heap [k])->active = k + 1;
532 k = j;
533 }
534
535 heap [k] = w;
536 ((W)heap [k])->active = k + 1;
537}
538
539inline void
540adjustheap (WT *heap, int N, int k)
541{
542 upheap (heap, k);
543 downheap (heap, N, k);
544}
545
546/*****************************************************************************/
547
548typedef struct
549{
550 WL head;
551 sig_atomic_t volatile gotsig;
552} ANSIG;
553
554static ANSIG *signals;
555static int signalmax;
556
557static int sigpipe [2];
558static sig_atomic_t volatile gotsig;
559static struct ev_io sigev;
560
561static void
562signals_init (ANSIG *base, int count)
563{
564 while (count--)
565 {
566 base->head = 0;
567 base->gotsig = 0;
568
569 ++base;
570 }
571}
572
573static void
574sighandler (int signum) 1373ev_sighandler (int signum)
575{ 1374{
576#if WIN32 1375#if EV_MULTIPLICITY
577 signal (signum, sighandler); 1376 EV_P = signals [signum - 1].loop;
578#endif 1377#endif
579 1378
580 signals [signum - 1].gotsig = 1;
581
582 if (!gotsig)
583 {
584 int old_errno = errno;
585 gotsig = 1;
586#ifdef WIN32 1379#ifdef _WIN32
587 send (sigpipe [1], &signum, 1, MSG_DONTWAIT); 1380 signal (signum, ev_sighandler);
588#else
589 write (sigpipe [1], &signum, 1);
590#endif 1381#endif
591 errno = old_errno;
592 }
593}
594 1382
595void 1383 signals [signum - 1].pending = 1;
1384 evpipe_write (EV_A_ &sig_pending);
1385}
1386
1387void noinline
596ev_feed_signal_event (EV_P_ int signum) 1388ev_feed_signal_event (EV_P_ int signum)
597{ 1389{
598 WL w; 1390 WL w;
599 1391
1392 if (expect_false (signum <= 0 || signum > EV_NSIG))
1393 return;
1394
1395 --signum;
1396
600#if EV_MULTIPLICITY 1397#if EV_MULTIPLICITY
601 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1398 /* it is permissible to try to feed a signal to the wrong loop */
602#endif 1399 /* or, likely more useful, feeding a signal nobody is waiting for */
603 1400
604 --signum; 1401 if (expect_false (signals [signum].loop != EV_A))
605
606 if (signum < 0 || signum >= signalmax)
607 return; 1402 return;
1403#endif
608 1404
609 signals [signum].gotsig = 0; 1405 signals [signum].pending = 0;
610 1406
611 for (w = signals [signum].head; w; w = w->next) 1407 for (w = signals [signum].head; w; w = w->next)
612 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1408 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
613} 1409}
614 1410
1411#if EV_USE_SIGNALFD
615static void 1412static void
616sigcb (EV_P_ struct ev_io *iow, int revents) 1413sigfdcb (EV_P_ ev_io *iow, int revents)
617{ 1414{
618 int signum; 1415 struct signalfd_siginfo si[2], *sip; /* these structs are big */
619 1416
620#ifdef WIN32 1417 for (;;)
621 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 1418 {
622#else 1419 ssize_t res = read (sigfd, si, sizeof (si));
623 read (sigpipe [0], &revents, 1);
624#endif
625 gotsig = 0;
626 1420
627 for (signum = signalmax; signum--; ) 1421 /* not ISO-C, as res might be -1, but works with SuS */
628 if (signals [signum].gotsig) 1422 for (sip = si; (char *)sip < (char *)si + res; ++sip)
629 ev_feed_signal_event (EV_A_ signum + 1); 1423 ev_feed_signal_event (EV_A_ sip->ssi_signo);
630}
631 1424
632static void 1425 if (res < (ssize_t)sizeof (si))
633siginit (EV_P) 1426 break;
634{ 1427 }
635#ifndef WIN32
636 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
637 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
638
639 /* rather than sort out wether we really need nb, set it */
640 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
641 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
642#endif
643
644 ev_io_set (&sigev, sigpipe [0], EV_READ);
645 ev_io_start (EV_A_ &sigev);
646 ev_unref (EV_A); /* child watcher should not keep loop alive */
647} 1428}
1429#endif
1430
1431#endif
648 1432
649/*****************************************************************************/ 1433/*****************************************************************************/
650 1434
651static struct ev_child *childs [PID_HASHSIZE]; 1435#if EV_CHILD_ENABLE
1436static WL childs [EV_PID_HASHSIZE];
652 1437
653#ifndef WIN32
654
655static struct ev_signal childev; 1438static ev_signal childev;
1439
1440#ifndef WIFCONTINUED
1441# define WIFCONTINUED(status) 0
1442#endif
1443
1444/* handle a single child status event */
1445inline_speed void
1446child_reap (EV_P_ int chain, int pid, int status)
1447{
1448 ev_child *w;
1449 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1450
1451 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1452 {
1453 if ((w->pid == pid || !w->pid)
1454 && (!traced || (w->flags & 1)))
1455 {
1456 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1457 w->rpid = pid;
1458 w->rstatus = status;
1459 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1460 }
1461 }
1462}
656 1463
657#ifndef WCONTINUED 1464#ifndef WCONTINUED
658# define WCONTINUED 0 1465# define WCONTINUED 0
659#endif 1466#endif
660 1467
1468/* called on sigchld etc., calls waitpid */
661static void 1469static void
662child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
663{
664 struct ev_child *w;
665
666 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
667 if (w->pid == pid || !w->pid)
668 {
669 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
670 w->rpid = pid;
671 w->rstatus = status;
672 ev_feed_event (EV_A_ (W)w, EV_CHILD);
673 }
674}
675
676static void
677childcb (EV_P_ struct ev_signal *sw, int revents) 1470childcb (EV_P_ ev_signal *sw, int revents)
678{ 1471{
679 int pid, status; 1472 int pid, status;
680 1473
1474 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
681 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1475 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
682 { 1476 if (!WCONTINUED
1477 || errno != EINVAL
1478 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1479 return;
1480
683 /* make sure we are called again until all childs have been reaped */ 1481 /* make sure we are called again until all children have been reaped */
1482 /* we need to do it this way so that the callback gets called before we continue */
684 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1483 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
685 1484
686 child_reap (EV_A_ sw, pid, pid, status); 1485 child_reap (EV_A_ pid, pid, status);
1486 if ((EV_PID_HASHSIZE) > 1)
687 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1487 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
688 }
689} 1488}
690 1489
691#endif 1490#endif
692 1491
693/*****************************************************************************/ 1492/*****************************************************************************/
694 1493
1494#if EV_USE_PORT
1495# include "ev_port.c"
1496#endif
695#if EV_USE_KQUEUE 1497#if EV_USE_KQUEUE
696# include "ev_kqueue.c" 1498# include "ev_kqueue.c"
697#endif 1499#endif
698#if EV_USE_EPOLL 1500#if EV_USE_EPOLL
699# include "ev_epoll.c" 1501# include "ev_epoll.c"
… …
716{ 1518{
717 return EV_VERSION_MINOR; 1519 return EV_VERSION_MINOR;
718} 1520}
719 1521
720/* return true if we are running with elevated privileges and should ignore env variables */ 1522/* return true if we are running with elevated privileges and should ignore env variables */
721static int 1523int inline_size
722enable_secure (void) 1524enable_secure (void)
723{ 1525{
724#ifdef WIN32 1526#ifdef _WIN32
725 return 0; 1527 return 0;
726#else 1528#else
727 return getuid () != geteuid () 1529 return getuid () != geteuid ()
728 || getgid () != getegid (); 1530 || getgid () != getegid ();
729#endif 1531#endif
730} 1532}
731 1533
732int 1534unsigned int
1535ev_supported_backends (void)
1536{
1537 unsigned int flags = 0;
1538
1539 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1540 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1541 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1542 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1543 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1544
1545 return flags;
1546}
1547
1548unsigned int
1549ev_recommended_backends (void)
1550{
1551 unsigned int flags = ev_supported_backends ();
1552
1553#ifndef __NetBSD__
1554 /* kqueue is borked on everything but netbsd apparently */
1555 /* it usually doesn't work correctly on anything but sockets and pipes */
1556 flags &= ~EVBACKEND_KQUEUE;
1557#endif
1558#ifdef __APPLE__
1559 /* only select works correctly on that "unix-certified" platform */
1560 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1561 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1562#endif
1563#ifdef __FreeBSD__
1564 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1565#endif
1566
1567 return flags;
1568}
1569
1570unsigned int
1571ev_embeddable_backends (void)
1572{
1573 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1574
1575 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1576 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1577 flags &= ~EVBACKEND_EPOLL;
1578
1579 return flags;
1580}
1581
1582unsigned int
1583ev_backend (EV_P)
1584{
1585 return backend;
1586}
1587
1588#if EV_FEATURE_API
1589unsigned int
1590ev_iteration (EV_P)
1591{
1592 return loop_count;
1593}
1594
1595unsigned int
733ev_method (EV_P) 1596ev_depth (EV_P)
734{ 1597{
735 return method; 1598 return loop_depth;
736} 1599}
737 1600
738static void 1601void
739loop_init (EV_P_ int methods) 1602ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
740{ 1603{
741 if (!method) 1604 io_blocktime = interval;
1605}
1606
1607void
1608ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1609{
1610 timeout_blocktime = interval;
1611}
1612
1613void
1614ev_set_userdata (EV_P_ void *data)
1615{
1616 userdata = data;
1617}
1618
1619void *
1620ev_userdata (EV_P)
1621{
1622 return userdata;
1623}
1624
1625void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1626{
1627 invoke_cb = invoke_pending_cb;
1628}
1629
1630void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1631{
1632 release_cb = release;
1633 acquire_cb = acquire;
1634}
1635#endif
1636
1637/* initialise a loop structure, must be zero-initialised */
1638static void noinline
1639loop_init (EV_P_ unsigned int flags)
1640{
1641 if (!backend)
742 { 1642 {
1643#if EV_USE_REALTIME
1644 if (!have_realtime)
1645 {
1646 struct timespec ts;
1647
1648 if (!clock_gettime (CLOCK_REALTIME, &ts))
1649 have_realtime = 1;
1650 }
1651#endif
1652
743#if EV_USE_MONOTONIC 1653#if EV_USE_MONOTONIC
1654 if (!have_monotonic)
1655 {
1656 struct timespec ts;
1657
1658 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1659 have_monotonic = 1;
1660 }
1661#endif
1662
1663 /* pid check not overridable via env */
1664#ifndef _WIN32
1665 if (flags & EVFLAG_FORKCHECK)
1666 curpid = getpid ();
1667#endif
1668
1669 if (!(flags & EVFLAG_NOENV)
1670 && !enable_secure ()
1671 && getenv ("LIBEV_FLAGS"))
1672 flags = atoi (getenv ("LIBEV_FLAGS"));
1673
1674 ev_rt_now = ev_time ();
1675 mn_now = get_clock ();
1676 now_floor = mn_now;
1677 rtmn_diff = ev_rt_now - mn_now;
1678#if EV_FEATURE_API
1679 invoke_cb = ev_invoke_pending;
1680#endif
1681
1682 io_blocktime = 0.;
1683 timeout_blocktime = 0.;
1684 backend = 0;
1685 backend_fd = -1;
1686 sig_pending = 0;
1687#if EV_ASYNC_ENABLE
1688 async_pending = 0;
1689#endif
1690#if EV_USE_INOTIFY
1691 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1692#endif
1693#if EV_USE_SIGNALFD
1694 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1695#endif
1696
1697 if (!(flags & 0x0000ffffU))
1698 flags |= ev_recommended_backends ();
1699
1700#if EV_USE_PORT
1701 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1702#endif
1703#if EV_USE_KQUEUE
1704 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1705#endif
1706#if EV_USE_EPOLL
1707 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1708#endif
1709#if EV_USE_POLL
1710 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1711#endif
1712#if EV_USE_SELECT
1713 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1714#endif
1715
1716 ev_prepare_init (&pending_w, pendingcb);
1717
1718#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1719 ev_init (&pipe_w, pipecb);
1720 ev_set_priority (&pipe_w, EV_MAXPRI);
1721#endif
1722 }
1723}
1724
1725/* free up a loop structure */
1726static void noinline
1727loop_destroy (EV_P)
1728{
1729 int i;
1730
1731 if (ev_is_active (&pipe_w))
1732 {
1733 /*ev_ref (EV_A);*/
1734 /*ev_io_stop (EV_A_ &pipe_w);*/
1735
1736#if EV_USE_EVENTFD
1737 if (evfd >= 0)
1738 close (evfd);
1739#endif
1740
1741 if (evpipe [0] >= 0)
1742 {
1743 EV_WIN32_CLOSE_FD (evpipe [0]);
1744 EV_WIN32_CLOSE_FD (evpipe [1]);
1745 }
1746 }
1747
1748#if EV_USE_SIGNALFD
1749 if (ev_is_active (&sigfd_w))
1750 close (sigfd);
1751#endif
1752
1753#if EV_USE_INOTIFY
1754 if (fs_fd >= 0)
1755 close (fs_fd);
1756#endif
1757
1758 if (backend_fd >= 0)
1759 close (backend_fd);
1760
1761#if EV_USE_PORT
1762 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1763#endif
1764#if EV_USE_KQUEUE
1765 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1766#endif
1767#if EV_USE_EPOLL
1768 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1769#endif
1770#if EV_USE_POLL
1771 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1772#endif
1773#if EV_USE_SELECT
1774 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1775#endif
1776
1777 for (i = NUMPRI; i--; )
1778 {
1779 array_free (pending, [i]);
1780#if EV_IDLE_ENABLE
1781 array_free (idle, [i]);
1782#endif
1783 }
1784
1785 ev_free (anfds); anfds = 0; anfdmax = 0;
1786
1787 /* have to use the microsoft-never-gets-it-right macro */
1788 array_free (rfeed, EMPTY);
1789 array_free (fdchange, EMPTY);
1790 array_free (timer, EMPTY);
1791#if EV_PERIODIC_ENABLE
1792 array_free (periodic, EMPTY);
1793#endif
1794#if EV_FORK_ENABLE
1795 array_free (fork, EMPTY);
1796#endif
1797 array_free (prepare, EMPTY);
1798 array_free (check, EMPTY);
1799#if EV_ASYNC_ENABLE
1800 array_free (async, EMPTY);
1801#endif
1802
1803 backend = 0;
1804}
1805
1806#if EV_USE_INOTIFY
1807inline_size void infy_fork (EV_P);
1808#endif
1809
1810inline_size void
1811loop_fork (EV_P)
1812{
1813#if EV_USE_PORT
1814 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1815#endif
1816#if EV_USE_KQUEUE
1817 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1818#endif
1819#if EV_USE_EPOLL
1820 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1821#endif
1822#if EV_USE_INOTIFY
1823 infy_fork (EV_A);
1824#endif
1825
1826 if (ev_is_active (&pipe_w))
1827 {
1828 /* this "locks" the handlers against writing to the pipe */
1829 /* while we modify the fd vars */
1830 sig_pending = 1;
1831#if EV_ASYNC_ENABLE
1832 async_pending = 1;
1833#endif
1834
1835 ev_ref (EV_A);
1836 ev_io_stop (EV_A_ &pipe_w);
1837
1838#if EV_USE_EVENTFD
1839 if (evfd >= 0)
1840 close (evfd);
1841#endif
1842
1843 if (evpipe [0] >= 0)
1844 {
1845 EV_WIN32_CLOSE_FD (evpipe [0]);
1846 EV_WIN32_CLOSE_FD (evpipe [1]);
1847 }
1848
1849#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1850 evpipe_init (EV_A);
1851 /* now iterate over everything, in case we missed something */
1852 pipecb (EV_A_ &pipe_w, EV_READ);
1853#endif
1854 }
1855
1856 postfork = 0;
1857}
1858
1859#if EV_MULTIPLICITY
1860
1861struct ev_loop *
1862ev_loop_new (unsigned int flags)
1863{
1864 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1865
1866 memset (EV_A, 0, sizeof (struct ev_loop));
1867 loop_init (EV_A_ flags);
1868
1869 if (ev_backend (EV_A))
1870 return EV_A;
1871
1872 return 0;
1873}
1874
1875void
1876ev_loop_destroy (EV_P)
1877{
1878 loop_destroy (EV_A);
1879 ev_free (loop);
1880}
1881
1882void
1883ev_loop_fork (EV_P)
1884{
1885 postfork = 1; /* must be in line with ev_default_fork */
1886}
1887#endif /* multiplicity */
1888
1889#if EV_VERIFY
1890static void noinline
1891verify_watcher (EV_P_ W w)
1892{
1893 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1894
1895 if (w->pending)
1896 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1897}
1898
1899static void noinline
1900verify_heap (EV_P_ ANHE *heap, int N)
1901{
1902 int i;
1903
1904 for (i = HEAP0; i < N + HEAP0; ++i)
1905 {
1906 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1907 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1908 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1909
1910 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1911 }
1912}
1913
1914static void noinline
1915array_verify (EV_P_ W *ws, int cnt)
1916{
1917 while (cnt--)
1918 {
1919 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1920 verify_watcher (EV_A_ ws [cnt]);
1921 }
1922}
1923#endif
1924
1925#if EV_FEATURE_API
1926void
1927ev_verify (EV_P)
1928{
1929#if EV_VERIFY
1930 int i;
1931 WL w;
1932
1933 assert (activecnt >= -1);
1934
1935 assert (fdchangemax >= fdchangecnt);
1936 for (i = 0; i < fdchangecnt; ++i)
1937 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1938
1939 assert (anfdmax >= 0);
1940 for (i = 0; i < anfdmax; ++i)
1941 for (w = anfds [i].head; w; w = w->next)
744 { 1942 {
745 struct timespec ts; 1943 verify_watcher (EV_A_ (W)w);
746 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1944 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
747 have_monotonic = 1; 1945 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
748 } 1946 }
749#endif
750 1947
751 ev_rt_now = ev_time (); 1948 assert (timermax >= timercnt);
752 mn_now = get_clock (); 1949 verify_heap (EV_A_ timers, timercnt);
753 now_floor = mn_now;
754 rtmn_diff = ev_rt_now - mn_now;
755 1950
756 if (methods == EVMETHOD_AUTO) 1951#if EV_PERIODIC_ENABLE
757 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1952 assert (periodicmax >= periodiccnt);
758 methods = atoi (getenv ("LIBEV_METHODS")); 1953 verify_heap (EV_A_ periodics, periodiccnt);
759 else
760 methods = EVMETHOD_ANY;
761
762 method = 0;
763#if EV_USE_WIN32
764 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
765#endif
766#if EV_USE_KQUEUE
767 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
768#endif
769#if EV_USE_EPOLL
770 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
771#endif
772#if EV_USE_POLL
773 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
774#endif
775#if EV_USE_SELECT
776 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
777#endif
778
779 ev_init (&sigev, sigcb);
780 ev_set_priority (&sigev, EV_MAXPRI);
781 }
782}
783
784void
785loop_destroy (EV_P)
786{
787 int i;
788
789#if EV_USE_WIN32
790 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
791#endif
792#if EV_USE_KQUEUE
793 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
794#endif
795#if EV_USE_EPOLL
796 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
797#endif
798#if EV_USE_POLL
799 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
800#endif
801#if EV_USE_SELECT
802 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
803#endif 1954#endif
804 1955
805 for (i = NUMPRI; i--; ) 1956 for (i = NUMPRI; i--; )
806 array_free (pending, [i]); 1957 {
1958 assert (pendingmax [i] >= pendingcnt [i]);
1959#if EV_IDLE_ENABLE
1960 assert (idleall >= 0);
1961 assert (idlemax [i] >= idlecnt [i]);
1962 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1963#endif
1964 }
807 1965
808 /* have to use the microsoft-never-gets-it-right macro */ 1966#if EV_FORK_ENABLE
809 array_free_microshit (fdchange); 1967 assert (forkmax >= forkcnt);
810 array_free_microshit (timer); 1968 array_verify (EV_A_ (W *)forks, forkcnt);
811#if EV_PERIODICS 1969#endif
812 array_free_microshit (periodic); 1970
1971#if EV_ASYNC_ENABLE
1972 assert (asyncmax >= asynccnt);
1973 array_verify (EV_A_ (W *)asyncs, asynccnt);
1974#endif
1975
1976#if EV_PREPARE_ENABLE
1977 assert (preparemax >= preparecnt);
1978 array_verify (EV_A_ (W *)prepares, preparecnt);
1979#endif
1980
1981#if EV_CHECK_ENABLE
1982 assert (checkmax >= checkcnt);
1983 array_verify (EV_A_ (W *)checks, checkcnt);
1984#endif
1985
1986# if 0
1987#if EV_CHILD_ENABLE
1988 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1989 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1990#endif
813#endif 1991# endif
814 array_free_microshit (idle);
815 array_free_microshit (prepare);
816 array_free_microshit (check);
817
818 method = 0;
819}
820
821static void
822loop_fork (EV_P)
823{
824#if EV_USE_EPOLL
825 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
826#endif 1992#endif
827#if EV_USE_KQUEUE
828 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
829#endif
830
831 if (ev_is_active (&sigev))
832 {
833 /* default loop */
834
835 ev_ref (EV_A);
836 ev_io_stop (EV_A_ &sigev);
837 close (sigpipe [0]);
838 close (sigpipe [1]);
839
840 while (pipe (sigpipe))
841 syserr ("(libev) error creating pipe");
842
843 siginit (EV_A);
844 }
845
846 postfork = 0;
847} 1993}
1994#endif
848 1995
849#if EV_MULTIPLICITY 1996#if EV_MULTIPLICITY
850struct ev_loop * 1997struct ev_loop *
851ev_loop_new (int methods) 1998ev_default_loop_init (unsigned int flags)
852{
853 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
854
855 memset (loop, 0, sizeof (struct ev_loop));
856
857 loop_init (EV_A_ methods);
858
859 if (ev_method (EV_A))
860 return loop;
861
862 return 0;
863}
864
865void
866ev_loop_destroy (EV_P)
867{
868 loop_destroy (EV_A);
869 ev_free (loop);
870}
871
872void
873ev_loop_fork (EV_P)
874{
875 postfork = 1;
876}
877
878#endif
879
880#if EV_MULTIPLICITY
881struct ev_loop *
882#else 1999#else
883int 2000int
2001ev_default_loop (unsigned int flags)
884#endif 2002#endif
885ev_default_loop (int methods)
886{ 2003{
887 if (sigpipe [0] == sigpipe [1])
888 if (pipe (sigpipe))
889 return 0;
890
891 if (!default_loop) 2004 if (!ev_default_loop_ptr)
892 { 2005 {
893#if EV_MULTIPLICITY 2006#if EV_MULTIPLICITY
894 struct ev_loop *loop = default_loop = &default_loop_struct; 2007 EV_P = ev_default_loop_ptr = &default_loop_struct;
895#else 2008#else
896 default_loop = 1; 2009 ev_default_loop_ptr = 1;
897#endif 2010#endif
898 2011
899 loop_init (EV_A_ methods); 2012 loop_init (EV_A_ flags);
900 2013
901 if (ev_method (EV_A)) 2014 if (ev_backend (EV_A))
902 { 2015 {
903 siginit (EV_A); 2016#if EV_CHILD_ENABLE
904
905#ifndef WIN32
906 ev_signal_init (&childev, childcb, SIGCHLD); 2017 ev_signal_init (&childev, childcb, SIGCHLD);
907 ev_set_priority (&childev, EV_MAXPRI); 2018 ev_set_priority (&childev, EV_MAXPRI);
908 ev_signal_start (EV_A_ &childev); 2019 ev_signal_start (EV_A_ &childev);
909 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2020 ev_unref (EV_A); /* child watcher should not keep loop alive */
910#endif 2021#endif
911 } 2022 }
912 else 2023 else
913 default_loop = 0; 2024 ev_default_loop_ptr = 0;
914 } 2025 }
915 2026
916 return default_loop; 2027 return ev_default_loop_ptr;
917} 2028}
918 2029
919void 2030void
920ev_default_destroy (void) 2031ev_default_destroy (void)
921{ 2032{
922#if EV_MULTIPLICITY 2033#if EV_MULTIPLICITY
923 struct ev_loop *loop = default_loop; 2034 EV_P = ev_default_loop_ptr;
924#endif 2035#endif
925 2036
926#ifndef WIN32 2037 ev_default_loop_ptr = 0;
2038
2039#if EV_CHILD_ENABLE
927 ev_ref (EV_A); /* child watcher */ 2040 ev_ref (EV_A); /* child watcher */
928 ev_signal_stop (EV_A_ &childev); 2041 ev_signal_stop (EV_A_ &childev);
929#endif 2042#endif
930 2043
931 ev_ref (EV_A); /* signal watcher */
932 ev_io_stop (EV_A_ &sigev);
933
934 close (sigpipe [0]); sigpipe [0] = 0;
935 close (sigpipe [1]); sigpipe [1] = 0;
936
937 loop_destroy (EV_A); 2044 loop_destroy (EV_A);
938} 2045}
939 2046
940void 2047void
941ev_default_fork (void) 2048ev_default_fork (void)
942{ 2049{
943#if EV_MULTIPLICITY 2050#if EV_MULTIPLICITY
944 struct ev_loop *loop = default_loop; 2051 EV_P = ev_default_loop_ptr;
945#endif 2052#endif
946 2053
947 if (method) 2054 postfork = 1; /* must be in line with ev_loop_fork */
948 postfork = 1;
949} 2055}
950 2056
951/*****************************************************************************/ 2057/*****************************************************************************/
952 2058
953static int 2059void
954any_pending (EV_P) 2060ev_invoke (EV_P_ void *w, int revents)
2061{
2062 EV_CB_INVOKE ((W)w, revents);
2063}
2064
2065unsigned int
2066ev_pending_count (EV_P)
955{ 2067{
956 int pri; 2068 int pri;
2069 unsigned int count = 0;
957 2070
958 for (pri = NUMPRI; pri--; ) 2071 for (pri = NUMPRI; pri--; )
959 if (pendingcnt [pri]) 2072 count += pendingcnt [pri];
960 return 1;
961 2073
962 return 0; 2074 return count;
963} 2075}
964 2076
965static void 2077void noinline
966call_pending (EV_P) 2078ev_invoke_pending (EV_P)
967{ 2079{
968 int pri; 2080 int pri;
969 2081
970 for (pri = NUMPRI; pri--; ) 2082 for (pri = NUMPRI; pri--; )
971 while (pendingcnt [pri]) 2083 while (pendingcnt [pri])
972 { 2084 {
973 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2085 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
974 2086
975 if (p->w) 2087 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
976 { 2088 /* ^ this is no longer true, as pending_w could be here */
2089
977 p->w->pending = 0; 2090 p->w->pending = 0;
978 EV_CB_INVOKE (p->w, p->events); 2091 EV_CB_INVOKE (p->w, p->events);
979 } 2092 EV_FREQUENT_CHECK;
980 } 2093 }
981} 2094}
982 2095
983static void 2096#if EV_IDLE_ENABLE
2097/* make idle watchers pending. this handles the "call-idle */
2098/* only when higher priorities are idle" logic */
2099inline_size void
2100idle_reify (EV_P)
2101{
2102 if (expect_false (idleall))
2103 {
2104 int pri;
2105
2106 for (pri = NUMPRI; pri--; )
2107 {
2108 if (pendingcnt [pri])
2109 break;
2110
2111 if (idlecnt [pri])
2112 {
2113 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2114 break;
2115 }
2116 }
2117 }
2118}
2119#endif
2120
2121/* make timers pending */
2122inline_size void
984timers_reify (EV_P) 2123timers_reify (EV_P)
985{ 2124{
2125 EV_FREQUENT_CHECK;
2126
986 while (timercnt && ((WT)timers [0])->at <= mn_now) 2127 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
987 { 2128 {
988 struct ev_timer *w = timers [0]; 2129 do
989
990 assert (("inactive timer on timer heap detected", ev_is_active (w)));
991
992 /* first reschedule or stop timer */
993 if (w->repeat)
994 { 2130 {
2131 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2132
2133 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2134
2135 /* first reschedule or stop timer */
2136 if (w->repeat)
2137 {
2138 ev_at (w) += w->repeat;
2139 if (ev_at (w) < mn_now)
2140 ev_at (w) = mn_now;
2141
995 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2142 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
996 2143
997 ((WT)w)->at += w->repeat; 2144 ANHE_at_cache (timers [HEAP0]);
998 if (((WT)w)->at < mn_now)
999 ((WT)w)->at = mn_now;
1000
1001 downheap ((WT *)timers, timercnt, 0); 2145 downheap (timers, timercnt, HEAP0);
2146 }
2147 else
2148 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2149
2150 EV_FREQUENT_CHECK;
2151 feed_reverse (EV_A_ (W)w);
1002 } 2152 }
1003 else 2153 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1004 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1005 2154
1006 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2155 feed_reverse_done (EV_A_ EV_TIMER);
1007 } 2156 }
1008} 2157}
1009 2158
1010#if EV_PERIODICS 2159#if EV_PERIODIC_ENABLE
1011static void 2160/* make periodics pending */
2161inline_size void
1012periodics_reify (EV_P) 2162periodics_reify (EV_P)
1013{ 2163{
2164 EV_FREQUENT_CHECK;
2165
1014 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2166 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1015 { 2167 {
1016 struct ev_periodic *w = periodics [0]; 2168 int feed_count = 0;
1017 2169
2170 do
2171 {
2172 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2173
1018 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2174 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1019 2175
1020 /* first reschedule or stop timer */ 2176 /* first reschedule or stop timer */
2177 if (w->reschedule_cb)
2178 {
2179 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2180
2181 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2182
2183 ANHE_at_cache (periodics [HEAP0]);
2184 downheap (periodics, periodiccnt, HEAP0);
2185 }
2186 else if (w->interval)
2187 {
2188 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2189 /* if next trigger time is not sufficiently in the future, put it there */
2190 /* this might happen because of floating point inexactness */
2191 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2192 {
2193 ev_at (w) += w->interval;
2194
2195 /* if interval is unreasonably low we might still have a time in the past */
2196 /* so correct this. this will make the periodic very inexact, but the user */
2197 /* has effectively asked to get triggered more often than possible */
2198 if (ev_at (w) < ev_rt_now)
2199 ev_at (w) = ev_rt_now;
2200 }
2201
2202 ANHE_at_cache (periodics [HEAP0]);
2203 downheap (periodics, periodiccnt, HEAP0);
2204 }
2205 else
2206 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2207
2208 EV_FREQUENT_CHECK;
2209 feed_reverse (EV_A_ (W)w);
2210 }
2211 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2212
2213 feed_reverse_done (EV_A_ EV_PERIODIC);
2214 }
2215}
2216
2217/* simply recalculate all periodics */
2218/* TODO: maybe ensure that at least one event happens when jumping forward? */
2219static void noinline
2220periodics_reschedule (EV_P)
2221{
2222 int i;
2223
2224 /* adjust periodics after time jump */
2225 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2226 {
2227 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2228
1021 if (w->reschedule_cb) 2229 if (w->reschedule_cb)
2230 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2231 else if (w->interval)
2232 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2233
2234 ANHE_at_cache (periodics [i]);
2235 }
2236
2237 reheap (periodics, periodiccnt);
2238}
2239#endif
2240
2241/* adjust all timers by a given offset */
2242static void noinline
2243timers_reschedule (EV_P_ ev_tstamp adjust)
2244{
2245 int i;
2246
2247 for (i = 0; i < timercnt; ++i)
2248 {
2249 ANHE *he = timers + i + HEAP0;
2250 ANHE_w (*he)->at += adjust;
2251 ANHE_at_cache (*he);
2252 }
2253}
2254
2255/* fetch new monotonic and realtime times from the kernel */
2256/* also detect if there was a timejump, and act accordingly */
2257inline_speed void
2258time_update (EV_P_ ev_tstamp max_block)
2259{
2260#if EV_USE_MONOTONIC
2261 if (expect_true (have_monotonic))
2262 {
2263 int i;
2264 ev_tstamp odiff = rtmn_diff;
2265
2266 mn_now = get_clock ();
2267
2268 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2269 /* interpolate in the meantime */
2270 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1022 { 2271 {
1023 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2272 ev_rt_now = rtmn_diff + mn_now;
1024 2273 return;
1025 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1026 downheap ((WT *)periodics, periodiccnt, 0);
1027 } 2274 }
1028 else if (w->interval)
1029 {
1030 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1031 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1032 downheap ((WT *)periodics, periodiccnt, 0);
1033 }
1034 else
1035 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1036 2275
1037 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1038 }
1039}
1040
1041static void
1042periodics_reschedule (EV_P)
1043{
1044 int i;
1045
1046 /* adjust periodics after time jump */
1047 for (i = 0; i < periodiccnt; ++i)
1048 {
1049 struct ev_periodic *w = periodics [i];
1050
1051 if (w->reschedule_cb)
1052 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1053 else if (w->interval)
1054 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1055 }
1056
1057 /* now rebuild the heap */
1058 for (i = periodiccnt >> 1; i--; )
1059 downheap ((WT *)periodics, periodiccnt, i);
1060}
1061#endif
1062
1063inline int
1064time_update_monotonic (EV_P)
1065{
1066 mn_now = get_clock ();
1067
1068 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1069 {
1070 ev_rt_now = rtmn_diff + mn_now;
1071 return 0;
1072 }
1073 else
1074 {
1075 now_floor = mn_now; 2276 now_floor = mn_now;
1076 ev_rt_now = ev_time (); 2277 ev_rt_now = ev_time ();
1077 return 1;
1078 }
1079}
1080 2278
1081static void 2279 /* loop a few times, before making important decisions.
1082time_update (EV_P) 2280 * on the choice of "4": one iteration isn't enough,
1083{ 2281 * in case we get preempted during the calls to
1084 int i; 2282 * ev_time and get_clock. a second call is almost guaranteed
1085 2283 * to succeed in that case, though. and looping a few more times
1086#if EV_USE_MONOTONIC 2284 * doesn't hurt either as we only do this on time-jumps or
1087 if (expect_true (have_monotonic)) 2285 * in the unlikely event of having been preempted here.
1088 { 2286 */
1089 if (time_update_monotonic (EV_A)) 2287 for (i = 4; --i; )
1090 { 2288 {
1091 ev_tstamp odiff = rtmn_diff;
1092
1093 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1094 {
1095 rtmn_diff = ev_rt_now - mn_now; 2289 rtmn_diff = ev_rt_now - mn_now;
1096 2290
1097 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2291 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1098 return; /* all is well */ 2292 return; /* all is well */
1099 2293
1100 ev_rt_now = ev_time (); 2294 ev_rt_now = ev_time ();
1101 mn_now = get_clock (); 2295 mn_now = get_clock ();
1102 now_floor = mn_now; 2296 now_floor = mn_now;
1103 } 2297 }
1104 2298
2299 /* no timer adjustment, as the monotonic clock doesn't jump */
2300 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1105# if EV_PERIODICS 2301# if EV_PERIODIC_ENABLE
2302 periodics_reschedule (EV_A);
2303# endif
2304 }
2305 else
2306#endif
2307 {
2308 ev_rt_now = ev_time ();
2309
2310 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2311 {
2312 /* adjust timers. this is easy, as the offset is the same for all of them */
2313 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2314#if EV_PERIODIC_ENABLE
1106 periodics_reschedule (EV_A); 2315 periodics_reschedule (EV_A);
1107# endif 2316#endif
1108 /* no timer adjustment, as the monotonic clock doesn't jump */
1109 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1110 } 2317 }
1111 }
1112 else
1113#endif
1114 {
1115 ev_rt_now = ev_time ();
1116
1117 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1118 {
1119#if EV_PERIODICS
1120 periodics_reschedule (EV_A);
1121#endif
1122
1123 /* adjust timers. this is easy, as the offset is the same for all */
1124 for (i = 0; i < timercnt; ++i)
1125 ((WT)timers [i])->at += ev_rt_now - mn_now;
1126 }
1127 2318
1128 mn_now = ev_rt_now; 2319 mn_now = ev_rt_now;
1129 } 2320 }
1130} 2321}
1131 2322
1132void 2323void
1133ev_ref (EV_P)
1134{
1135 ++activecnt;
1136}
1137
1138void
1139ev_unref (EV_P)
1140{
1141 --activecnt;
1142}
1143
1144static int loop_done;
1145
1146void
1147ev_loop (EV_P_ int flags) 2324ev_run (EV_P_ int flags)
1148{ 2325{
1149 double block; 2326#if EV_FEATURE_API
1150 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2327 ++loop_depth;
2328#endif
2329
2330 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2331
2332 loop_done = EVBREAK_CANCEL;
2333
2334 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1151 2335
1152 do 2336 do
1153 { 2337 {
2338#if EV_VERIFY >= 2
2339 ev_verify (EV_A);
2340#endif
2341
2342#ifndef _WIN32
2343 if (expect_false (curpid)) /* penalise the forking check even more */
2344 if (expect_false (getpid () != curpid))
2345 {
2346 curpid = getpid ();
2347 postfork = 1;
2348 }
2349#endif
2350
2351#if EV_FORK_ENABLE
2352 /* we might have forked, so queue fork handlers */
2353 if (expect_false (postfork))
2354 if (forkcnt)
2355 {
2356 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2357 EV_INVOKE_PENDING;
2358 }
2359#endif
2360
2361#if EV_PREPARE_ENABLE
1154 /* queue check watchers (and execute them) */ 2362 /* queue prepare watchers (and execute them) */
1155 if (expect_false (preparecnt)) 2363 if (expect_false (preparecnt))
1156 { 2364 {
1157 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2365 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1158 call_pending (EV_A); 2366 EV_INVOKE_PENDING;
1159 } 2367 }
2368#endif
2369
2370 if (expect_false (loop_done))
2371 break;
1160 2372
1161 /* we might have forked, so reify kernel state if necessary */ 2373 /* we might have forked, so reify kernel state if necessary */
1162 if (expect_false (postfork)) 2374 if (expect_false (postfork))
1163 loop_fork (EV_A); 2375 loop_fork (EV_A);
1164 2376
1165 /* update fd-related kernel structures */ 2377 /* update fd-related kernel structures */
1166 fd_reify (EV_A); 2378 fd_reify (EV_A);
1167 2379
1168 /* calculate blocking time */ 2380 /* calculate blocking time */
2381 {
2382 ev_tstamp waittime = 0.;
2383 ev_tstamp sleeptime = 0.;
1169 2384
1170 /* we only need this for !monotonic clock or timers, but as we basically 2385 /* remember old timestamp for io_blocktime calculation */
1171 always have timers, we just calculate it always */ 2386 ev_tstamp prev_mn_now = mn_now;
1172#if EV_USE_MONOTONIC 2387
1173 if (expect_true (have_monotonic)) 2388 /* update time to cancel out callback processing overhead */
1174 time_update_monotonic (EV_A); 2389 time_update (EV_A_ 1e100);
1175 else 2390
1176#endif 2391 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1177 { 2392 {
1178 ev_rt_now = ev_time ();
1179 mn_now = ev_rt_now;
1180 }
1181
1182 if (flags & EVLOOP_NONBLOCK || idlecnt)
1183 block = 0.;
1184 else
1185 {
1186 block = MAX_BLOCKTIME; 2393 waittime = MAX_BLOCKTIME;
1187 2394
1188 if (timercnt) 2395 if (timercnt)
1189 { 2396 {
1190 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2397 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1191 if (block > to) block = to; 2398 if (waittime > to) waittime = to;
1192 } 2399 }
1193 2400
1194#if EV_PERIODICS 2401#if EV_PERIODIC_ENABLE
1195 if (periodiccnt) 2402 if (periodiccnt)
1196 { 2403 {
1197 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2404 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1198 if (block > to) block = to; 2405 if (waittime > to) waittime = to;
1199 } 2406 }
1200#endif 2407#endif
1201 2408
1202 if (block < 0.) block = 0.; 2409 /* don't let timeouts decrease the waittime below timeout_blocktime */
2410 if (expect_false (waittime < timeout_blocktime))
2411 waittime = timeout_blocktime;
2412
2413 /* extra check because io_blocktime is commonly 0 */
2414 if (expect_false (io_blocktime))
2415 {
2416 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2417
2418 if (sleeptime > waittime - backend_fudge)
2419 sleeptime = waittime - backend_fudge;
2420
2421 if (expect_true (sleeptime > 0.))
2422 {
2423 ev_sleep (sleeptime);
2424 waittime -= sleeptime;
2425 }
2426 }
1203 } 2427 }
1204 2428
1205 method_poll (EV_A_ block); 2429#if EV_FEATURE_API
2430 ++loop_count;
2431#endif
2432 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2433 backend_poll (EV_A_ waittime);
2434 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1206 2435
1207 /* update ev_rt_now, do magic */ 2436 /* update ev_rt_now, do magic */
1208 time_update (EV_A); 2437 time_update (EV_A_ waittime + sleeptime);
2438 }
1209 2439
1210 /* queue pending timers and reschedule them */ 2440 /* queue pending timers and reschedule them */
1211 timers_reify (EV_A); /* relative timers called last */ 2441 timers_reify (EV_A); /* relative timers called last */
1212#if EV_PERIODICS 2442#if EV_PERIODIC_ENABLE
1213 periodics_reify (EV_A); /* absolute timers called first */ 2443 periodics_reify (EV_A); /* absolute timers called first */
1214#endif 2444#endif
1215 2445
2446#if EV_IDLE_ENABLE
1216 /* queue idle watchers unless io or timers are pending */ 2447 /* queue idle watchers unless other events are pending */
1217 if (idlecnt && !any_pending (EV_A)) 2448 idle_reify (EV_A);
1218 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2449#endif
1219 2450
2451#if EV_CHECK_ENABLE
1220 /* queue check watchers, to be executed first */ 2452 /* queue check watchers, to be executed first */
1221 if (checkcnt) 2453 if (expect_false (checkcnt))
1222 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2454 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2455#endif
1223 2456
1224 call_pending (EV_A); 2457 EV_INVOKE_PENDING;
1225 } 2458 }
1226 while (activecnt && !loop_done); 2459 while (expect_true (
2460 activecnt
2461 && !loop_done
2462 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2463 ));
1227 2464
1228 if (loop_done != 2) 2465 if (loop_done == EVBREAK_ONE)
1229 loop_done = 0; 2466 loop_done = EVBREAK_CANCEL;
1230}
1231 2467
2468#if EV_FEATURE_API
2469 --loop_depth;
2470#endif
2471}
2472
1232void 2473void
1233ev_unloop (EV_P_ int how) 2474ev_break (EV_P_ int how)
1234{ 2475{
1235 loop_done = how; 2476 loop_done = how;
1236} 2477}
1237 2478
2479void
2480ev_ref (EV_P)
2481{
2482 ++activecnt;
2483}
2484
2485void
2486ev_unref (EV_P)
2487{
2488 --activecnt;
2489}
2490
2491void
2492ev_now_update (EV_P)
2493{
2494 time_update (EV_A_ 1e100);
2495}
2496
2497void
2498ev_suspend (EV_P)
2499{
2500 ev_now_update (EV_A);
2501}
2502
2503void
2504ev_resume (EV_P)
2505{
2506 ev_tstamp mn_prev = mn_now;
2507
2508 ev_now_update (EV_A);
2509 timers_reschedule (EV_A_ mn_now - mn_prev);
2510#if EV_PERIODIC_ENABLE
2511 /* TODO: really do this? */
2512 periodics_reschedule (EV_A);
2513#endif
2514}
2515
1238/*****************************************************************************/ 2516/*****************************************************************************/
2517/* singly-linked list management, used when the expected list length is short */
1239 2518
1240inline void 2519inline_size void
1241wlist_add (WL *head, WL elem) 2520wlist_add (WL *head, WL elem)
1242{ 2521{
1243 elem->next = *head; 2522 elem->next = *head;
1244 *head = elem; 2523 *head = elem;
1245} 2524}
1246 2525
1247inline void 2526inline_size void
1248wlist_del (WL *head, WL elem) 2527wlist_del (WL *head, WL elem)
1249{ 2528{
1250 while (*head) 2529 while (*head)
1251 { 2530 {
1252 if (*head == elem) 2531 if (expect_true (*head == elem))
1253 { 2532 {
1254 *head = elem->next; 2533 *head = elem->next;
1255 return; 2534 break;
1256 } 2535 }
1257 2536
1258 head = &(*head)->next; 2537 head = &(*head)->next;
1259 } 2538 }
1260} 2539}
1261 2540
2541/* internal, faster, version of ev_clear_pending */
1262inline void 2542inline_speed void
1263ev_clear_pending (EV_P_ W w) 2543clear_pending (EV_P_ W w)
1264{ 2544{
1265 if (w->pending) 2545 if (w->pending)
1266 { 2546 {
1267 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2547 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1268 w->pending = 0; 2548 w->pending = 0;
1269 } 2549 }
1270} 2550}
1271 2551
2552int
2553ev_clear_pending (EV_P_ void *w)
2554{
2555 W w_ = (W)w;
2556 int pending = w_->pending;
2557
2558 if (expect_true (pending))
2559 {
2560 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2561 p->w = (W)&pending_w;
2562 w_->pending = 0;
2563 return p->events;
2564 }
2565 else
2566 return 0;
2567}
2568
1272inline void 2569inline_size void
2570pri_adjust (EV_P_ W w)
2571{
2572 int pri = ev_priority (w);
2573 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2574 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2575 ev_set_priority (w, pri);
2576}
2577
2578inline_speed void
1273ev_start (EV_P_ W w, int active) 2579ev_start (EV_P_ W w, int active)
1274{ 2580{
1275 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2581 pri_adjust (EV_A_ w);
1276 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1277
1278 w->active = active; 2582 w->active = active;
1279 ev_ref (EV_A); 2583 ev_ref (EV_A);
1280} 2584}
1281 2585
1282inline void 2586inline_size void
1283ev_stop (EV_P_ W w) 2587ev_stop (EV_P_ W w)
1284{ 2588{
1285 ev_unref (EV_A); 2589 ev_unref (EV_A);
1286 w->active = 0; 2590 w->active = 0;
1287} 2591}
1288 2592
1289/*****************************************************************************/ 2593/*****************************************************************************/
1290 2594
1291void 2595void noinline
1292ev_io_start (EV_P_ struct ev_io *w) 2596ev_io_start (EV_P_ ev_io *w)
1293{ 2597{
1294 int fd = w->fd; 2598 int fd = w->fd;
1295 2599
1296 if (ev_is_active (w)) 2600 if (expect_false (ev_is_active (w)))
1297 return; 2601 return;
1298 2602
1299 assert (("ev_io_start called with negative fd", fd >= 0)); 2603 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2604 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2605
2606 EV_FREQUENT_CHECK;
1300 2607
1301 ev_start (EV_A_ (W)w, 1); 2608 ev_start (EV_A_ (W)w, 1);
1302 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2609 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1303 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2610 wlist_add (&anfds[fd].head, (WL)w);
1304 2611
1305 fd_change (EV_A_ fd); 2612 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1306} 2613 w->events &= ~EV__IOFDSET;
1307 2614
1308void 2615 EV_FREQUENT_CHECK;
2616}
2617
2618void noinline
1309ev_io_stop (EV_P_ struct ev_io *w) 2619ev_io_stop (EV_P_ ev_io *w)
1310{ 2620{
1311 ev_clear_pending (EV_A_ (W)w); 2621 clear_pending (EV_A_ (W)w);
1312 if (!ev_is_active (w)) 2622 if (expect_false (!ev_is_active (w)))
1313 return; 2623 return;
1314 2624
1315 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2625 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1316 2626
2627 EV_FREQUENT_CHECK;
2628
1317 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2629 wlist_del (&anfds[w->fd].head, (WL)w);
1318 ev_stop (EV_A_ (W)w); 2630 ev_stop (EV_A_ (W)w);
1319 2631
1320 fd_change (EV_A_ w->fd); 2632 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1321}
1322 2633
1323void 2634 EV_FREQUENT_CHECK;
2635}
2636
2637void noinline
1324ev_timer_start (EV_P_ struct ev_timer *w) 2638ev_timer_start (EV_P_ ev_timer *w)
1325{ 2639{
1326 if (ev_is_active (w)) 2640 if (expect_false (ev_is_active (w)))
1327 return; 2641 return;
1328 2642
1329 ((WT)w)->at += mn_now; 2643 ev_at (w) += mn_now;
1330 2644
1331 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2645 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1332 2646
2647 EV_FREQUENT_CHECK;
2648
2649 ++timercnt;
1333 ev_start (EV_A_ (W)w, ++timercnt); 2650 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1334 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2651 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1335 timers [timercnt - 1] = w; 2652 ANHE_w (timers [ev_active (w)]) = (WT)w;
1336 upheap ((WT *)timers, timercnt - 1); 2653 ANHE_at_cache (timers [ev_active (w)]);
2654 upheap (timers, ev_active (w));
1337 2655
2656 EV_FREQUENT_CHECK;
2657
1338 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2658 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1339} 2659}
1340 2660
1341void 2661void noinline
1342ev_timer_stop (EV_P_ struct ev_timer *w) 2662ev_timer_stop (EV_P_ ev_timer *w)
1343{ 2663{
1344 ev_clear_pending (EV_A_ (W)w); 2664 clear_pending (EV_A_ (W)w);
1345 if (!ev_is_active (w)) 2665 if (expect_false (!ev_is_active (w)))
1346 return; 2666 return;
1347 2667
2668 EV_FREQUENT_CHECK;
2669
2670 {
2671 int active = ev_active (w);
2672
1348 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2673 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1349 2674
1350 if (((W)w)->active < timercnt--) 2675 --timercnt;
2676
2677 if (expect_true (active < timercnt + HEAP0))
1351 { 2678 {
1352 timers [((W)w)->active - 1] = timers [timercnt]; 2679 timers [active] = timers [timercnt + HEAP0];
1353 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2680 adjustheap (timers, timercnt, active);
1354 } 2681 }
2682 }
1355 2683
1356 ((WT)w)->at -= mn_now; 2684 ev_at (w) -= mn_now;
1357 2685
1358 ev_stop (EV_A_ (W)w); 2686 ev_stop (EV_A_ (W)w);
1359}
1360 2687
1361void 2688 EV_FREQUENT_CHECK;
2689}
2690
2691void noinline
1362ev_timer_again (EV_P_ struct ev_timer *w) 2692ev_timer_again (EV_P_ ev_timer *w)
1363{ 2693{
2694 EV_FREQUENT_CHECK;
2695
1364 if (ev_is_active (w)) 2696 if (ev_is_active (w))
1365 { 2697 {
1366 if (w->repeat) 2698 if (w->repeat)
1367 { 2699 {
1368 ((WT)w)->at = mn_now + w->repeat; 2700 ev_at (w) = mn_now + w->repeat;
2701 ANHE_at_cache (timers [ev_active (w)]);
1369 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2702 adjustheap (timers, timercnt, ev_active (w));
1370 } 2703 }
1371 else 2704 else
1372 ev_timer_stop (EV_A_ w); 2705 ev_timer_stop (EV_A_ w);
1373 } 2706 }
1374 else if (w->repeat) 2707 else if (w->repeat)
2708 {
2709 ev_at (w) = w->repeat;
1375 ev_timer_start (EV_A_ w); 2710 ev_timer_start (EV_A_ w);
1376} 2711 }
1377 2712
2713 EV_FREQUENT_CHECK;
2714}
2715
2716ev_tstamp
2717ev_timer_remaining (EV_P_ ev_timer *w)
2718{
2719 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2720}
2721
1378#if EV_PERIODICS 2722#if EV_PERIODIC_ENABLE
1379void 2723void noinline
1380ev_periodic_start (EV_P_ struct ev_periodic *w) 2724ev_periodic_start (EV_P_ ev_periodic *w)
1381{ 2725{
1382 if (ev_is_active (w)) 2726 if (expect_false (ev_is_active (w)))
1383 return; 2727 return;
1384 2728
1385 if (w->reschedule_cb) 2729 if (w->reschedule_cb)
1386 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2730 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1387 else if (w->interval) 2731 else if (w->interval)
1388 { 2732 {
1389 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2733 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1390 /* this formula differs from the one in periodic_reify because we do not always round up */ 2734 /* this formula differs from the one in periodic_reify because we do not always round up */
1391 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2735 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1392 } 2736 }
2737 else
2738 ev_at (w) = w->offset;
1393 2739
2740 EV_FREQUENT_CHECK;
2741
2742 ++periodiccnt;
1394 ev_start (EV_A_ (W)w, ++periodiccnt); 2743 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1395 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2744 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1396 periodics [periodiccnt - 1] = w; 2745 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1397 upheap ((WT *)periodics, periodiccnt - 1); 2746 ANHE_at_cache (periodics [ev_active (w)]);
2747 upheap (periodics, ev_active (w));
1398 2748
2749 EV_FREQUENT_CHECK;
2750
1399 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2751 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1400} 2752}
1401 2753
1402void 2754void noinline
1403ev_periodic_stop (EV_P_ struct ev_periodic *w) 2755ev_periodic_stop (EV_P_ ev_periodic *w)
1404{ 2756{
1405 ev_clear_pending (EV_A_ (W)w); 2757 clear_pending (EV_A_ (W)w);
1406 if (!ev_is_active (w)) 2758 if (expect_false (!ev_is_active (w)))
1407 return; 2759 return;
1408 2760
2761 EV_FREQUENT_CHECK;
2762
2763 {
2764 int active = ev_active (w);
2765
1409 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2766 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1410 2767
1411 if (((W)w)->active < periodiccnt--) 2768 --periodiccnt;
2769
2770 if (expect_true (active < periodiccnt + HEAP0))
1412 { 2771 {
1413 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2772 periodics [active] = periodics [periodiccnt + HEAP0];
1414 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2773 adjustheap (periodics, periodiccnt, active);
1415 } 2774 }
2775 }
1416 2776
1417 ev_stop (EV_A_ (W)w); 2777 ev_stop (EV_A_ (W)w);
1418}
1419 2778
1420void 2779 EV_FREQUENT_CHECK;
2780}
2781
2782void noinline
1421ev_periodic_again (EV_P_ struct ev_periodic *w) 2783ev_periodic_again (EV_P_ ev_periodic *w)
1422{ 2784{
1423 /* TODO: use adjustheap and recalculation */ 2785 /* TODO: use adjustheap and recalculation */
1424 ev_periodic_stop (EV_A_ w); 2786 ev_periodic_stop (EV_A_ w);
1425 ev_periodic_start (EV_A_ w); 2787 ev_periodic_start (EV_A_ w);
1426} 2788}
1427#endif 2789#endif
1428 2790
1429void
1430ev_idle_start (EV_P_ struct ev_idle *w)
1431{
1432 if (ev_is_active (w))
1433 return;
1434
1435 ev_start (EV_A_ (W)w, ++idlecnt);
1436 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1437 idles [idlecnt - 1] = w;
1438}
1439
1440void
1441ev_idle_stop (EV_P_ struct ev_idle *w)
1442{
1443 ev_clear_pending (EV_A_ (W)w);
1444 if (!ev_is_active (w))
1445 return;
1446
1447 idles [((W)w)->active - 1] = idles [--idlecnt];
1448 ev_stop (EV_A_ (W)w);
1449}
1450
1451void
1452ev_prepare_start (EV_P_ struct ev_prepare *w)
1453{
1454 if (ev_is_active (w))
1455 return;
1456
1457 ev_start (EV_A_ (W)w, ++preparecnt);
1458 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1459 prepares [preparecnt - 1] = w;
1460}
1461
1462void
1463ev_prepare_stop (EV_P_ struct ev_prepare *w)
1464{
1465 ev_clear_pending (EV_A_ (W)w);
1466 if (!ev_is_active (w))
1467 return;
1468
1469 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1470 ev_stop (EV_A_ (W)w);
1471}
1472
1473void
1474ev_check_start (EV_P_ struct ev_check *w)
1475{
1476 if (ev_is_active (w))
1477 return;
1478
1479 ev_start (EV_A_ (W)w, ++checkcnt);
1480 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1481 checks [checkcnt - 1] = w;
1482}
1483
1484void
1485ev_check_stop (EV_P_ struct ev_check *w)
1486{
1487 ev_clear_pending (EV_A_ (W)w);
1488 if (!ev_is_active (w))
1489 return;
1490
1491 checks [((W)w)->active - 1] = checks [--checkcnt];
1492 ev_stop (EV_A_ (W)w);
1493}
1494
1495#ifndef SA_RESTART 2791#ifndef SA_RESTART
1496# define SA_RESTART 0 2792# define SA_RESTART 0
1497#endif 2793#endif
1498 2794
1499void 2795#if EV_SIGNAL_ENABLE
2796
2797void noinline
1500ev_signal_start (EV_P_ struct ev_signal *w) 2798ev_signal_start (EV_P_ ev_signal *w)
1501{ 2799{
2800 if (expect_false (ev_is_active (w)))
2801 return;
2802
2803 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2804
1502#if EV_MULTIPLICITY 2805#if EV_MULTIPLICITY
1503 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2806 assert (("libev: a signal must not be attached to two different loops",
2807 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2808
2809 signals [w->signum - 1].loop = EV_A;
2810#endif
2811
2812 EV_FREQUENT_CHECK;
2813
2814#if EV_USE_SIGNALFD
2815 if (sigfd == -2)
2816 {
2817 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2818 if (sigfd < 0 && errno == EINVAL)
2819 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2820
2821 if (sigfd >= 0)
2822 {
2823 fd_intern (sigfd); /* doing it twice will not hurt */
2824
2825 sigemptyset (&sigfd_set);
2826
2827 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2828 ev_set_priority (&sigfd_w, EV_MAXPRI);
2829 ev_io_start (EV_A_ &sigfd_w);
2830 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2831 }
2832 }
2833
2834 if (sigfd >= 0)
2835 {
2836 /* TODO: check .head */
2837 sigaddset (&sigfd_set, w->signum);
2838 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2839
2840 signalfd (sigfd, &sigfd_set, 0);
2841 }
2842#endif
2843
2844 ev_start (EV_A_ (W)w, 1);
2845 wlist_add (&signals [w->signum - 1].head, (WL)w);
2846
2847 if (!((WL)w)->next)
2848# if EV_USE_SIGNALFD
2849 if (sigfd < 0) /*TODO*/
1504#endif 2850# endif
1505 if (ev_is_active (w)) 2851 {
2852# ifdef _WIN32
2853 evpipe_init (EV_A);
2854
2855 signal (w->signum, ev_sighandler);
2856# else
2857 struct sigaction sa;
2858
2859 evpipe_init (EV_A);
2860
2861 sa.sa_handler = ev_sighandler;
2862 sigfillset (&sa.sa_mask);
2863 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2864 sigaction (w->signum, &sa, 0);
2865
2866 sigemptyset (&sa.sa_mask);
2867 sigaddset (&sa.sa_mask, w->signum);
2868 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2869#endif
2870 }
2871
2872 EV_FREQUENT_CHECK;
2873}
2874
2875void noinline
2876ev_signal_stop (EV_P_ ev_signal *w)
2877{
2878 clear_pending (EV_A_ (W)w);
2879 if (expect_false (!ev_is_active (w)))
1506 return; 2880 return;
1507 2881
1508 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2882 EV_FREQUENT_CHECK;
2883
2884 wlist_del (&signals [w->signum - 1].head, (WL)w);
2885 ev_stop (EV_A_ (W)w);
2886
2887 if (!signals [w->signum - 1].head)
2888 {
2889#if EV_MULTIPLICITY
2890 signals [w->signum - 1].loop = 0; /* unattach from signal */
2891#endif
2892#if EV_USE_SIGNALFD
2893 if (sigfd >= 0)
2894 {
2895 sigset_t ss;
2896
2897 sigemptyset (&ss);
2898 sigaddset (&ss, w->signum);
2899 sigdelset (&sigfd_set, w->signum);
2900
2901 signalfd (sigfd, &sigfd_set, 0);
2902 sigprocmask (SIG_UNBLOCK, &ss, 0);
2903 }
2904 else
2905#endif
2906 signal (w->signum, SIG_DFL);
2907 }
2908
2909 EV_FREQUENT_CHECK;
2910}
2911
2912#endif
2913
2914#if EV_CHILD_ENABLE
2915
2916void
2917ev_child_start (EV_P_ ev_child *w)
2918{
2919#if EV_MULTIPLICITY
2920 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2921#endif
2922 if (expect_false (ev_is_active (w)))
2923 return;
2924
2925 EV_FREQUENT_CHECK;
1509 2926
1510 ev_start (EV_A_ (W)w, 1); 2927 ev_start (EV_A_ (W)w, 1);
1511 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2928 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1512 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1513 2929
1514 if (!((WL)w)->next) 2930 EV_FREQUENT_CHECK;
2931}
2932
2933void
2934ev_child_stop (EV_P_ ev_child *w)
2935{
2936 clear_pending (EV_A_ (W)w);
2937 if (expect_false (!ev_is_active (w)))
2938 return;
2939
2940 EV_FREQUENT_CHECK;
2941
2942 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2943 ev_stop (EV_A_ (W)w);
2944
2945 EV_FREQUENT_CHECK;
2946}
2947
2948#endif
2949
2950#if EV_STAT_ENABLE
2951
2952# ifdef _WIN32
2953# undef lstat
2954# define lstat(a,b) _stati64 (a,b)
2955# endif
2956
2957#define DEF_STAT_INTERVAL 5.0074891
2958#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2959#define MIN_STAT_INTERVAL 0.1074891
2960
2961static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2962
2963#if EV_USE_INOTIFY
2964
2965/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2966# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2967
2968static void noinline
2969infy_add (EV_P_ ev_stat *w)
2970{
2971 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);
2972
2973 if (w->wd >= 0)
2974 {
2975 struct statfs sfs;
2976
2977 /* now local changes will be tracked by inotify, but remote changes won't */
2978 /* unless the filesystem is known to be local, we therefore still poll */
2979 /* also do poll on <2.6.25, but with normal frequency */
2980
2981 if (!fs_2625)
2982 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2983 else if (!statfs (w->path, &sfs)
2984 && (sfs.f_type == 0x1373 /* devfs */
2985 || sfs.f_type == 0xEF53 /* ext2/3 */
2986 || sfs.f_type == 0x3153464a /* jfs */
2987 || sfs.f_type == 0x52654973 /* reiser3 */
2988 || sfs.f_type == 0x01021994 /* tempfs */
2989 || sfs.f_type == 0x58465342 /* xfs */))
2990 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2991 else
2992 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1515 { 2993 }
1516#if WIN32 2994 else
1517 signal (w->signum, sighandler); 2995 {
2996 /* can't use inotify, continue to stat */
2997 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2998
2999 /* if path is not there, monitor some parent directory for speedup hints */
3000 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3001 /* but an efficiency issue only */
3002 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3003 {
3004 char path [4096];
3005 strcpy (path, w->path);
3006
3007 do
3008 {
3009 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3010 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3011
3012 char *pend = strrchr (path, '/');
3013
3014 if (!pend || pend == path)
3015 break;
3016
3017 *pend = 0;
3018 w->wd = inotify_add_watch (fs_fd, path, mask);
3019 }
3020 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3021 }
3022 }
3023
3024 if (w->wd >= 0)
3025 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3026
3027 /* now re-arm timer, if required */
3028 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3029 ev_timer_again (EV_A_ &w->timer);
3030 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3031}
3032
3033static void noinline
3034infy_del (EV_P_ ev_stat *w)
3035{
3036 int slot;
3037 int wd = w->wd;
3038
3039 if (wd < 0)
3040 return;
3041
3042 w->wd = -2;
3043 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3044 wlist_del (&fs_hash [slot].head, (WL)w);
3045
3046 /* remove this watcher, if others are watching it, they will rearm */
3047 inotify_rm_watch (fs_fd, wd);
3048}
3049
3050static void noinline
3051infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3052{
3053 if (slot < 0)
3054 /* overflow, need to check for all hash slots */
3055 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3056 infy_wd (EV_A_ slot, wd, ev);
3057 else
3058 {
3059 WL w_;
3060
3061 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3062 {
3063 ev_stat *w = (ev_stat *)w_;
3064 w_ = w_->next; /* lets us remove this watcher and all before it */
3065
3066 if (w->wd == wd || wd == -1)
3067 {
3068 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3069 {
3070 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3071 w->wd = -1;
3072 infy_add (EV_A_ w); /* re-add, no matter what */
3073 }
3074
3075 stat_timer_cb (EV_A_ &w->timer, 0);
3076 }
3077 }
3078 }
3079}
3080
3081static void
3082infy_cb (EV_P_ ev_io *w, int revents)
3083{
3084 char buf [EV_INOTIFY_BUFSIZE];
3085 int ofs;
3086 int len = read (fs_fd, buf, sizeof (buf));
3087
3088 for (ofs = 0; ofs < len; )
3089 {
3090 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3091 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3092 ofs += sizeof (struct inotify_event) + ev->len;
3093 }
3094}
3095
3096inline_size void
3097ev_check_2625 (EV_P)
3098{
3099 /* kernels < 2.6.25 are borked
3100 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3101 */
3102 if (ev_linux_version () < 0x020619)
3103 return;
3104
3105 fs_2625 = 1;
3106}
3107
3108inline_size int
3109infy_newfd (void)
3110{
3111#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3112 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3113 if (fd >= 0)
3114 return fd;
3115#endif
3116 return inotify_init ();
3117}
3118
3119inline_size void
3120infy_init (EV_P)
3121{
3122 if (fs_fd != -2)
3123 return;
3124
3125 fs_fd = -1;
3126
3127 ev_check_2625 (EV_A);
3128
3129 fs_fd = infy_newfd ();
3130
3131 if (fs_fd >= 0)
3132 {
3133 fd_intern (fs_fd);
3134 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3135 ev_set_priority (&fs_w, EV_MAXPRI);
3136 ev_io_start (EV_A_ &fs_w);
3137 ev_unref (EV_A);
3138 }
3139}
3140
3141inline_size void
3142infy_fork (EV_P)
3143{
3144 int slot;
3145
3146 if (fs_fd < 0)
3147 return;
3148
3149 ev_ref (EV_A);
3150 ev_io_stop (EV_A_ &fs_w);
3151 close (fs_fd);
3152 fs_fd = infy_newfd ();
3153
3154 if (fs_fd >= 0)
3155 {
3156 fd_intern (fs_fd);
3157 ev_io_set (&fs_w, fs_fd, EV_READ);
3158 ev_io_start (EV_A_ &fs_w);
3159 ev_unref (EV_A);
3160 }
3161
3162 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3163 {
3164 WL w_ = fs_hash [slot].head;
3165 fs_hash [slot].head = 0;
3166
3167 while (w_)
3168 {
3169 ev_stat *w = (ev_stat *)w_;
3170 w_ = w_->next; /* lets us add this watcher */
3171
3172 w->wd = -1;
3173
3174 if (fs_fd >= 0)
3175 infy_add (EV_A_ w); /* re-add, no matter what */
3176 else
3177 {
3178 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3179 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3180 ev_timer_again (EV_A_ &w->timer);
3181 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3182 }
3183 }
3184 }
3185}
3186
3187#endif
3188
3189#ifdef _WIN32
3190# define EV_LSTAT(p,b) _stati64 (p, b)
1518#else 3191#else
1519 struct sigaction sa; 3192# define EV_LSTAT(p,b) lstat (p, b)
1520 sa.sa_handler = sighandler;
1521 sigfillset (&sa.sa_mask);
1522 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1523 sigaction (w->signum, &sa, 0);
1524#endif 3193#endif
1525 }
1526}
1527 3194
1528void 3195void
1529ev_signal_stop (EV_P_ struct ev_signal *w) 3196ev_stat_stat (EV_P_ ev_stat *w)
1530{ 3197{
1531 ev_clear_pending (EV_A_ (W)w); 3198 if (lstat (w->path, &w->attr) < 0)
1532 if (!ev_is_active (w)) 3199 w->attr.st_nlink = 0;
3200 else if (!w->attr.st_nlink)
3201 w->attr.st_nlink = 1;
3202}
3203
3204static void noinline
3205stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3206{
3207 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3208
3209 ev_statdata prev = w->attr;
3210 ev_stat_stat (EV_A_ w);
3211
3212 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3213 if (
3214 prev.st_dev != w->attr.st_dev
3215 || prev.st_ino != w->attr.st_ino
3216 || prev.st_mode != w->attr.st_mode
3217 || prev.st_nlink != w->attr.st_nlink
3218 || prev.st_uid != w->attr.st_uid
3219 || prev.st_gid != w->attr.st_gid
3220 || prev.st_rdev != w->attr.st_rdev
3221 || prev.st_size != w->attr.st_size
3222 || prev.st_atime != w->attr.st_atime
3223 || prev.st_mtime != w->attr.st_mtime
3224 || prev.st_ctime != w->attr.st_ctime
3225 ) {
3226 /* we only update w->prev on actual differences */
3227 /* in case we test more often than invoke the callback, */
3228 /* to ensure that prev is always different to attr */
3229 w->prev = prev;
3230
3231 #if EV_USE_INOTIFY
3232 if (fs_fd >= 0)
3233 {
3234 infy_del (EV_A_ w);
3235 infy_add (EV_A_ w);
3236 ev_stat_stat (EV_A_ w); /* avoid race... */
3237 }
3238 #endif
3239
3240 ev_feed_event (EV_A_ w, EV_STAT);
3241 }
3242}
3243
3244void
3245ev_stat_start (EV_P_ ev_stat *w)
3246{
3247 if (expect_false (ev_is_active (w)))
1533 return; 3248 return;
1534 3249
1535 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3250 ev_stat_stat (EV_A_ w);
3251
3252 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3253 w->interval = MIN_STAT_INTERVAL;
3254
3255 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3256 ev_set_priority (&w->timer, ev_priority (w));
3257
3258#if EV_USE_INOTIFY
3259 infy_init (EV_A);
3260
3261 if (fs_fd >= 0)
3262 infy_add (EV_A_ w);
3263 else
3264#endif
3265 {
3266 ev_timer_again (EV_A_ &w->timer);
3267 ev_unref (EV_A);
3268 }
3269
3270 ev_start (EV_A_ (W)w, 1);
3271
3272 EV_FREQUENT_CHECK;
3273}
3274
3275void
3276ev_stat_stop (EV_P_ ev_stat *w)
3277{
3278 clear_pending (EV_A_ (W)w);
3279 if (expect_false (!ev_is_active (w)))
3280 return;
3281
3282 EV_FREQUENT_CHECK;
3283
3284#if EV_USE_INOTIFY
3285 infy_del (EV_A_ w);
3286#endif
3287
3288 if (ev_is_active (&w->timer))
3289 {
3290 ev_ref (EV_A);
3291 ev_timer_stop (EV_A_ &w->timer);
3292 }
3293
1536 ev_stop (EV_A_ (W)w); 3294 ev_stop (EV_A_ (W)w);
1537 3295
1538 if (!signals [w->signum - 1].head) 3296 EV_FREQUENT_CHECK;
1539 signal (w->signum, SIG_DFL);
1540} 3297}
3298#endif
1541 3299
3300#if EV_IDLE_ENABLE
1542void 3301void
1543ev_child_start (EV_P_ struct ev_child *w) 3302ev_idle_start (EV_P_ ev_idle *w)
1544{ 3303{
1545#if EV_MULTIPLICITY
1546 assert (("child watchers are only supported in the default loop", loop == default_loop));
1547#endif
1548 if (ev_is_active (w)) 3304 if (expect_false (ev_is_active (w)))
1549 return; 3305 return;
1550 3306
3307 pri_adjust (EV_A_ (W)w);
3308
3309 EV_FREQUENT_CHECK;
3310
3311 {
3312 int active = ++idlecnt [ABSPRI (w)];
3313
3314 ++idleall;
3315 ev_start (EV_A_ (W)w, active);
3316
3317 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3318 idles [ABSPRI (w)][active - 1] = w;
3319 }
3320
3321 EV_FREQUENT_CHECK;
3322}
3323
3324void
3325ev_idle_stop (EV_P_ ev_idle *w)
3326{
3327 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w)))
3329 return;
3330
3331 EV_FREQUENT_CHECK;
3332
3333 {
3334 int active = ev_active (w);
3335
3336 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3337 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3338
3339 ev_stop (EV_A_ (W)w);
3340 --idleall;
3341 }
3342
3343 EV_FREQUENT_CHECK;
3344}
3345#endif
3346
3347#if EV_PREPARE_ENABLE
3348void
3349ev_prepare_start (EV_P_ ev_prepare *w)
3350{
3351 if (expect_false (ev_is_active (w)))
3352 return;
3353
3354 EV_FREQUENT_CHECK;
3355
3356 ev_start (EV_A_ (W)w, ++preparecnt);
3357 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3358 prepares [preparecnt - 1] = w;
3359
3360 EV_FREQUENT_CHECK;
3361}
3362
3363void
3364ev_prepare_stop (EV_P_ ev_prepare *w)
3365{
3366 clear_pending (EV_A_ (W)w);
3367 if (expect_false (!ev_is_active (w)))
3368 return;
3369
3370 EV_FREQUENT_CHECK;
3371
3372 {
3373 int active = ev_active (w);
3374
3375 prepares [active - 1] = prepares [--preparecnt];
3376 ev_active (prepares [active - 1]) = active;
3377 }
3378
3379 ev_stop (EV_A_ (W)w);
3380
3381 EV_FREQUENT_CHECK;
3382}
3383#endif
3384
3385#if EV_CHECK_ENABLE
3386void
3387ev_check_start (EV_P_ ev_check *w)
3388{
3389 if (expect_false (ev_is_active (w)))
3390 return;
3391
3392 EV_FREQUENT_CHECK;
3393
3394 ev_start (EV_A_ (W)w, ++checkcnt);
3395 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3396 checks [checkcnt - 1] = w;
3397
3398 EV_FREQUENT_CHECK;
3399}
3400
3401void
3402ev_check_stop (EV_P_ ev_check *w)
3403{
3404 clear_pending (EV_A_ (W)w);
3405 if (expect_false (!ev_is_active (w)))
3406 return;
3407
3408 EV_FREQUENT_CHECK;
3409
3410 {
3411 int active = ev_active (w);
3412
3413 checks [active - 1] = checks [--checkcnt];
3414 ev_active (checks [active - 1]) = active;
3415 }
3416
3417 ev_stop (EV_A_ (W)w);
3418
3419 EV_FREQUENT_CHECK;
3420}
3421#endif
3422
3423#if EV_EMBED_ENABLE
3424void noinline
3425ev_embed_sweep (EV_P_ ev_embed *w)
3426{
3427 ev_run (w->other, EVRUN_NOWAIT);
3428}
3429
3430static void
3431embed_io_cb (EV_P_ ev_io *io, int revents)
3432{
3433 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3434
3435 if (ev_cb (w))
3436 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3437 else
3438 ev_run (w->other, EVRUN_NOWAIT);
3439}
3440
3441static void
3442embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3443{
3444 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3445
3446 {
3447 EV_P = w->other;
3448
3449 while (fdchangecnt)
3450 {
3451 fd_reify (EV_A);
3452 ev_run (EV_A_ EVRUN_NOWAIT);
3453 }
3454 }
3455}
3456
3457static void
3458embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3459{
3460 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3461
3462 ev_embed_stop (EV_A_ w);
3463
3464 {
3465 EV_P = w->other;
3466
3467 ev_loop_fork (EV_A);
3468 ev_run (EV_A_ EVRUN_NOWAIT);
3469 }
3470
3471 ev_embed_start (EV_A_ w);
3472}
3473
3474#if 0
3475static void
3476embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3477{
3478 ev_idle_stop (EV_A_ idle);
3479}
3480#endif
3481
3482void
3483ev_embed_start (EV_P_ ev_embed *w)
3484{
3485 if (expect_false (ev_is_active (w)))
3486 return;
3487
3488 {
3489 EV_P = w->other;
3490 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3491 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3492 }
3493
3494 EV_FREQUENT_CHECK;
3495
3496 ev_set_priority (&w->io, ev_priority (w));
3497 ev_io_start (EV_A_ &w->io);
3498
3499 ev_prepare_init (&w->prepare, embed_prepare_cb);
3500 ev_set_priority (&w->prepare, EV_MINPRI);
3501 ev_prepare_start (EV_A_ &w->prepare);
3502
3503 ev_fork_init (&w->fork, embed_fork_cb);
3504 ev_fork_start (EV_A_ &w->fork);
3505
3506 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3507
1551 ev_start (EV_A_ (W)w, 1); 3508 ev_start (EV_A_ (W)w, 1);
1552 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1553}
1554 3509
3510 EV_FREQUENT_CHECK;
3511}
3512
1555void 3513void
1556ev_child_stop (EV_P_ struct ev_child *w) 3514ev_embed_stop (EV_P_ ev_embed *w)
1557{ 3515{
1558 ev_clear_pending (EV_A_ (W)w); 3516 clear_pending (EV_A_ (W)w);
1559 if (!ev_is_active (w)) 3517 if (expect_false (!ev_is_active (w)))
1560 return; 3518 return;
1561 3519
1562 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3520 EV_FREQUENT_CHECK;
3521
3522 ev_io_stop (EV_A_ &w->io);
3523 ev_prepare_stop (EV_A_ &w->prepare);
3524 ev_fork_stop (EV_A_ &w->fork);
3525
1563 ev_stop (EV_A_ (W)w); 3526 ev_stop (EV_A_ (W)w);
3527
3528 EV_FREQUENT_CHECK;
1564} 3529}
3530#endif
3531
3532#if EV_FORK_ENABLE
3533void
3534ev_fork_start (EV_P_ ev_fork *w)
3535{
3536 if (expect_false (ev_is_active (w)))
3537 return;
3538
3539 EV_FREQUENT_CHECK;
3540
3541 ev_start (EV_A_ (W)w, ++forkcnt);
3542 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3543 forks [forkcnt - 1] = w;
3544
3545 EV_FREQUENT_CHECK;
3546}
3547
3548void
3549ev_fork_stop (EV_P_ ev_fork *w)
3550{
3551 clear_pending (EV_A_ (W)w);
3552 if (expect_false (!ev_is_active (w)))
3553 return;
3554
3555 EV_FREQUENT_CHECK;
3556
3557 {
3558 int active = ev_active (w);
3559
3560 forks [active - 1] = forks [--forkcnt];
3561 ev_active (forks [active - 1]) = active;
3562 }
3563
3564 ev_stop (EV_A_ (W)w);
3565
3566 EV_FREQUENT_CHECK;
3567}
3568#endif
3569
3570#if EV_ASYNC_ENABLE
3571void
3572ev_async_start (EV_P_ ev_async *w)
3573{
3574 if (expect_false (ev_is_active (w)))
3575 return;
3576
3577 w->sent = 0;
3578
3579 evpipe_init (EV_A);
3580
3581 EV_FREQUENT_CHECK;
3582
3583 ev_start (EV_A_ (W)w, ++asynccnt);
3584 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3585 asyncs [asynccnt - 1] = w;
3586
3587 EV_FREQUENT_CHECK;
3588}
3589
3590void
3591ev_async_stop (EV_P_ ev_async *w)
3592{
3593 clear_pending (EV_A_ (W)w);
3594 if (expect_false (!ev_is_active (w)))
3595 return;
3596
3597 EV_FREQUENT_CHECK;
3598
3599 {
3600 int active = ev_active (w);
3601
3602 asyncs [active - 1] = asyncs [--asynccnt];
3603 ev_active (asyncs [active - 1]) = active;
3604 }
3605
3606 ev_stop (EV_A_ (W)w);
3607
3608 EV_FREQUENT_CHECK;
3609}
3610
3611void
3612ev_async_send (EV_P_ ev_async *w)
3613{
3614 w->sent = 1;
3615 evpipe_write (EV_A_ &async_pending);
3616}
3617#endif
1565 3618
1566/*****************************************************************************/ 3619/*****************************************************************************/
1567 3620
1568struct ev_once 3621struct ev_once
1569{ 3622{
1570 struct ev_io io; 3623 ev_io io;
1571 struct ev_timer to; 3624 ev_timer to;
1572 void (*cb)(int revents, void *arg); 3625 void (*cb)(int revents, void *arg);
1573 void *arg; 3626 void *arg;
1574}; 3627};
1575 3628
1576static void 3629static void
1577once_cb (EV_P_ struct ev_once *once, int revents) 3630once_cb (EV_P_ struct ev_once *once, int revents)
1578{ 3631{
1579 void (*cb)(int revents, void *arg) = once->cb; 3632 void (*cb)(int revents, void *arg) = once->cb;
1580 void *arg = once->arg; 3633 void *arg = once->arg;
1581 3634
1582 ev_io_stop (EV_A_ &once->io); 3635 ev_io_stop (EV_A_ &once->io);
1583 ev_timer_stop (EV_A_ &once->to); 3636 ev_timer_stop (EV_A_ &once->to);
1584 ev_free (once); 3637 ev_free (once);
1585 3638
1586 cb (revents, arg); 3639 cb (revents, arg);
1587} 3640}
1588 3641
1589static void 3642static void
1590once_cb_io (EV_P_ struct ev_io *w, int revents) 3643once_cb_io (EV_P_ ev_io *w, int revents)
1591{ 3644{
1592 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3645 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3646
3647 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1593} 3648}
1594 3649
1595static void 3650static void
1596once_cb_to (EV_P_ struct ev_timer *w, int revents) 3651once_cb_to (EV_P_ ev_timer *w, int revents)
1597{ 3652{
1598 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3653 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3654
3655 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1599} 3656}
1600 3657
1601void 3658void
1602ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3659ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1603{ 3660{
1604 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3661 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1605 3662
1606 if (!once) 3663 if (expect_false (!once))
3664 {
1607 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3665 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1608 else 3666 return;
1609 { 3667 }
3668
1610 once->cb = cb; 3669 once->cb = cb;
1611 once->arg = arg; 3670 once->arg = arg;
1612 3671
1613 ev_init (&once->io, once_cb_io); 3672 ev_init (&once->io, once_cb_io);
1614 if (fd >= 0) 3673 if (fd >= 0)
3674 {
3675 ev_io_set (&once->io, fd, events);
3676 ev_io_start (EV_A_ &once->io);
3677 }
3678
3679 ev_init (&once->to, once_cb_to);
3680 if (timeout >= 0.)
3681 {
3682 ev_timer_set (&once->to, timeout, 0.);
3683 ev_timer_start (EV_A_ &once->to);
3684 }
3685}
3686
3687/*****************************************************************************/
3688
3689#if EV_WALK_ENABLE
3690void
3691ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3692{
3693 int i, j;
3694 ev_watcher_list *wl, *wn;
3695
3696 if (types & (EV_IO | EV_EMBED))
3697 for (i = 0; i < anfdmax; ++i)
3698 for (wl = anfds [i].head; wl; )
1615 { 3699 {
1616 ev_io_set (&once->io, fd, events); 3700 wn = wl->next;
1617 ev_io_start (EV_A_ &once->io); 3701
3702#if EV_EMBED_ENABLE
3703 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3704 {
3705 if (types & EV_EMBED)
3706 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3707 }
3708 else
3709#endif
3710#if EV_USE_INOTIFY
3711 if (ev_cb ((ev_io *)wl) == infy_cb)
3712 ;
3713 else
3714#endif
3715 if ((ev_io *)wl != &pipe_w)
3716 if (types & EV_IO)
3717 cb (EV_A_ EV_IO, wl);
3718
3719 wl = wn;
1618 } 3720 }
1619 3721
1620 ev_init (&once->to, once_cb_to); 3722 if (types & (EV_TIMER | EV_STAT))
1621 if (timeout >= 0.) 3723 for (i = timercnt + HEAP0; i-- > HEAP0; )
3724#if EV_STAT_ENABLE
3725 /*TODO: timer is not always active*/
3726 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1622 { 3727 {
1623 ev_timer_set (&once->to, timeout, 0.); 3728 if (types & EV_STAT)
1624 ev_timer_start (EV_A_ &once->to); 3729 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1625 } 3730 }
1626 } 3731 else
1627} 3732#endif
3733 if (types & EV_TIMER)
3734 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1628 3735
1629#ifdef __cplusplus 3736#if EV_PERIODIC_ENABLE
1630} 3737 if (types & EV_PERIODIC)
3738 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3739 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3740#endif
3741
3742#if EV_IDLE_ENABLE
3743 if (types & EV_IDLE)
3744 for (j = NUMPRI; i--; )
3745 for (i = idlecnt [j]; i--; )
3746 cb (EV_A_ EV_IDLE, idles [j][i]);
3747#endif
3748
3749#if EV_FORK_ENABLE
3750 if (types & EV_FORK)
3751 for (i = forkcnt; i--; )
3752 if (ev_cb (forks [i]) != embed_fork_cb)
3753 cb (EV_A_ EV_FORK, forks [i]);
3754#endif
3755
3756#if EV_ASYNC_ENABLE
3757 if (types & EV_ASYNC)
3758 for (i = asynccnt; i--; )
3759 cb (EV_A_ EV_ASYNC, asyncs [i]);
3760#endif
3761
3762#if EV_PREPARE_ENABLE
3763 if (types & EV_PREPARE)
3764 for (i = preparecnt; i--; )
3765# if EV_EMBED_ENABLE
3766 if (ev_cb (prepares [i]) != embed_prepare_cb)
1631#endif 3767# endif
3768 cb (EV_A_ EV_PREPARE, prepares [i]);
3769#endif
1632 3770
3771#if EV_CHECK_ENABLE
3772 if (types & EV_CHECK)
3773 for (i = checkcnt; i--; )
3774 cb (EV_A_ EV_CHECK, checks [i]);
3775#endif
3776
3777#if EV_SIGNAL_ENABLE
3778 if (types & EV_SIGNAL)
3779 for (i = 0; i < EV_NSIG - 1; ++i)
3780 for (wl = signals [i].head; wl; )
3781 {
3782 wn = wl->next;
3783 cb (EV_A_ EV_SIGNAL, wl);
3784 wl = wn;
3785 }
3786#endif
3787
3788#if EV_CHILD_ENABLE
3789 if (types & EV_CHILD)
3790 for (i = (EV_PID_HASHSIZE); i--; )
3791 for (wl = childs [i]; wl; )
3792 {
3793 wn = wl->next;
3794 cb (EV_A_ EV_CHILD, wl);
3795 wl = wn;
3796 }
3797#endif
3798/* EV_STAT 0x00001000 /* stat data changed */
3799/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3800}
3801#endif
3802
3803#if EV_MULTIPLICITY
3804 #include "ev_wrap.h"
3805#endif
3806
3807EV_CPP(})
3808

Diff Legend

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