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Comparing libev/ev.c (file contents):
Revision 1.126 by root, Sun Nov 18 01:25:23 2007 UTC vs.
Revision 1.357 by root, Sat Oct 23 22:25:44 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
45# endif 68# endif
46# else 69# else
47# ifndef EV_USE_MONOTONIC 70# ifndef EV_USE_MONOTONIC
48# define EV_USE_MONOTONIC 0 71# define EV_USE_MONOTONIC 0
49# endif 72# endif
50# ifndef EV_USE_REALTIME 73# ifndef EV_USE_REALTIME
51# define EV_USE_REALTIME 0 74# define EV_USE_REALTIME 0
52# endif 75# endif
53# endif 76# endif
54 77
55# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 78# if HAVE_NANOSLEEP
56# define EV_USE_SELECT 1 79# ifndef EV_USE_NANOSLEEP
80# define EV_USE_NANOSLEEP EV_FEATURE_OS
81# endif
57# else 82# else
83# undef EV_USE_NANOSLEEP
84# define EV_USE_NANOSLEEP 0
85# endif
86
87# if HAVE_SELECT && HAVE_SYS_SELECT_H
88# ifndef EV_USE_SELECT
89# define EV_USE_SELECT EV_FEATURE_BACKENDS
90# endif
91# else
92# undef EV_USE_SELECT
58# define EV_USE_SELECT 0 93# define EV_USE_SELECT 0
59# endif 94# endif
60 95
61# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 96# if HAVE_POLL && HAVE_POLL_H
62# define EV_USE_POLL 1 97# ifndef EV_USE_POLL
98# define EV_USE_POLL EV_FEATURE_BACKENDS
99# endif
63# else 100# else
101# undef EV_USE_POLL
64# define EV_USE_POLL 0 102# define EV_USE_POLL 0
65# endif 103# endif
66 104
67# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
68# define EV_USE_EPOLL 1 106# ifndef EV_USE_EPOLL
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif
69# else 109# else
110# undef EV_USE_EPOLL
70# define EV_USE_EPOLL 0 111# define EV_USE_EPOLL 0
71# endif 112# endif
72 113
73# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
74# define EV_USE_KQUEUE 1 115# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# endif
75# else 118# else
119# undef EV_USE_KQUEUE
76# define EV_USE_KQUEUE 0 120# define EV_USE_KQUEUE 0
77# endif 121# endif
78 122
79# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT) 123# if HAVE_PORT_H && HAVE_PORT_CREATE
80# define EV_USE_PORT 1 124# ifndef EV_USE_PORT
125# define EV_USE_PORT EV_FEATURE_BACKENDS
126# endif
81# else 127# else
128# undef EV_USE_PORT
82# define EV_USE_PORT 0 129# define EV_USE_PORT 0
83# endif 130# endif
84 131
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
85#endif 159#endif
86 160
87#include <math.h> 161#include <math.h>
88#include <stdlib.h> 162#include <stdlib.h>
163#include <string.h>
89#include <fcntl.h> 164#include <fcntl.h>
90#include <stddef.h> 165#include <stddef.h>
91 166
92#include <stdio.h> 167#include <stdio.h>
93 168
94#include <assert.h> 169#include <assert.h>
95#include <errno.h> 170#include <errno.h>
96#include <sys/types.h> 171#include <sys/types.h>
97#include <time.h> 172#include <time.h>
173#include <limits.h>
98 174
99#include <signal.h> 175#include <signal.h>
100 176
177#ifdef EV_H
178# include EV_H
179#else
180# include "ev.h"
181#endif
182
183EV_CPP(extern "C" {)
184
101#ifndef _WIN32 185#ifndef _WIN32
102# include <unistd.h>
103# include <sys/time.h> 186# include <sys/time.h>
104# include <sys/wait.h> 187# include <sys/wait.h>
188# include <unistd.h>
105#else 189#else
190# include <io.h>
106# define WIN32_LEAN_AND_MEAN 191# define WIN32_LEAN_AND_MEAN
107# include <windows.h> 192# include <windows.h>
108# ifndef EV_SELECT_IS_WINSOCKET 193# ifndef EV_SELECT_IS_WINSOCKET
109# define EV_SELECT_IS_WINSOCKET 1 194# define EV_SELECT_IS_WINSOCKET 1
110# endif 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
111#endif 242# endif
112 243#endif
113/**/
114 244
115#ifndef EV_USE_MONOTONIC 245#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else
116# define EV_USE_MONOTONIC 0 249# define EV_USE_MONOTONIC 0
250# endif
117#endif 251#endif
118 252
119#ifndef EV_USE_REALTIME 253#ifndef EV_USE_REALTIME
120# define EV_USE_REALTIME 0 254# 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
121#endif 263#endif
122 264
123#ifndef EV_USE_SELECT 265#ifndef EV_USE_SELECT
124# define EV_USE_SELECT 1 266# define EV_USE_SELECT EV_FEATURE_BACKENDS
125#endif 267#endif
126 268
127#ifndef EV_USE_POLL 269#ifndef EV_USE_POLL
128# ifdef _WIN32 270# ifdef _WIN32
129# define EV_USE_POLL 0 271# define EV_USE_POLL 0
130# else 272# else
131# define EV_USE_POLL 1 273# define EV_USE_POLL EV_FEATURE_BACKENDS
132# endif 274# endif
133#endif 275#endif
134 276
135#ifndef EV_USE_EPOLL 277#ifndef EV_USE_EPOLL
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_EPOLL EV_FEATURE_BACKENDS
280# else
136# define EV_USE_EPOLL 0 281# define EV_USE_EPOLL 0
282# endif
137#endif 283#endif
138 284
139#ifndef EV_USE_KQUEUE 285#ifndef EV_USE_KQUEUE
140# define EV_USE_KQUEUE 0 286# define EV_USE_KQUEUE 0
141#endif 287#endif
142 288
143#ifndef EV_USE_PORT 289#ifndef EV_USE_PORT
144# define EV_USE_PORT 0 290# define EV_USE_PORT 0
145#endif 291#endif
146 292
147/**/ 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
148 300
149/* darwin simply cannot be helped */ 301#ifndef EV_PID_HASHSIZE
150#ifdef __APPLE__ 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 */
151# undef EV_USE_POLL 361# undef EV_USE_POLL
152# undef EV_USE_KQUEUE 362# define EV_USE_POLL 0
153#endif 363#endif
154 364
155#ifndef CLOCK_MONOTONIC 365#ifndef CLOCK_MONOTONIC
156# undef EV_USE_MONOTONIC 366# undef EV_USE_MONOTONIC
157# define EV_USE_MONOTONIC 0 367# define EV_USE_MONOTONIC 0
… …
160#ifndef CLOCK_REALTIME 370#ifndef CLOCK_REALTIME
161# undef EV_USE_REALTIME 371# undef EV_USE_REALTIME
162# define EV_USE_REALTIME 0 372# define EV_USE_REALTIME 0
163#endif 373#endif
164 374
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
165#if EV_SELECT_IS_WINSOCKET 396#if EV_SELECT_IS_WINSOCKET
166# include <winsock.h> 397# include <winsock.h>
167#endif 398#endif
168 399
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
169/**/ 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 */
170 455
171#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 456#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
172#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
173#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
174/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
175 458
176#ifdef EV_H 459#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
177# include EV_H 460#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
178#else
179# include "ev.h"
180#endif
181 461
182#if __GNUC__ >= 3 462#if __GNUC__ >= 4
183# define expect(expr,value) __builtin_expect ((expr),(value)) 463# define expect(expr,value) __builtin_expect ((expr),(value))
184# define inline static inline 464# define noinline __attribute__ ((noinline))
185#else 465#else
186# define expect(expr,value) (expr) 466# define expect(expr,value) (expr)
187# define inline static 467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif
188#endif 471#endif
189 472
190#define expect_false(expr) expect ((expr) != 0, 0) 473#define expect_false(expr) expect ((expr) != 0, 0)
191#define expect_true(expr) expect ((expr) != 0, 1) 474#define expect_true(expr) expect ((expr) != 0, 1)
475#define inline_size static inline
192 476
477#if EV_FEATURE_CODE
478# define inline_speed static inline
479#else
480# define inline_speed static noinline
481#endif
482
193#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
194#define ABSPRI(w) ((w)->priority - EV_MINPRI) 488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif
195 490
196#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 491#define EMPTY /* required for microsofts broken pseudo-c compiler */
197#define EMPTY2(a,b) /* used to suppress some warnings */ 492#define EMPTY2(a,b) /* used to suppress some warnings */
198 493
199typedef struct ev_watcher *W; 494typedef ev_watcher *W;
200typedef struct ev_watcher_list *WL; 495typedef ev_watcher_list *WL;
201typedef struct ev_watcher_time *WT; 496typedef ev_watcher_time *WT;
202 497
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
203static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
509#endif
510
511#ifndef EV_FD_TO_WIN32_HANDLE
512# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
513#endif
514#ifndef EV_WIN32_HANDLE_TO_FD
515# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
516#endif
517#ifndef EV_WIN32_CLOSE_FD
518# define EV_WIN32_CLOSE_FD(fd) close (fd)
519#endif
204 520
205#ifdef _WIN32 521#ifdef _WIN32
206# include "ev_win32.c" 522# include "ev_win32.c"
207#endif 523#endif
208 524
209/*****************************************************************************/ 525/*****************************************************************************/
210 526
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
211static void (*syserr_cb)(const char *msg); 577static void (*syserr_cb)(const char *msg);
212 578
579void
213void ev_set_syserr_cb (void (*cb)(const char *msg)) 580ev_set_syserr_cb (void (*cb)(const char *msg))
214{ 581{
215 syserr_cb = cb; 582 syserr_cb = cb;
216} 583}
217 584
218static void 585static void noinline
219syserr (const char *msg) 586ev_syserr (const char *msg)
220{ 587{
221 if (!msg) 588 if (!msg)
222 msg = "(libev) system error"; 589 msg = "(libev) system error";
223 590
224 if (syserr_cb) 591 if (syserr_cb)
225 syserr_cb (msg); 592 syserr_cb (msg);
226 else 593 else
227 { 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
228 perror (msg); 603 perror (msg);
604#endif
229 abort (); 605 abort ();
230 } 606 }
231} 607}
232 608
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
233static void *(*alloc)(void *ptr, long size); 628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
234 629
630void
235void ev_set_allocator (void *(*cb)(void *ptr, long size)) 631ev_set_allocator (void *(*cb)(void *ptr, long size))
236{ 632{
237 alloc = cb; 633 alloc = cb;
238} 634}
239 635
240static void * 636inline_speed void *
241ev_realloc (void *ptr, long size) 637ev_realloc (void *ptr, long size)
242{ 638{
243 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 639 ptr = alloc (ptr, size);
244 640
245 if (!ptr && size) 641 if (!ptr && size)
246 { 642 {
643#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n");
645#else
247 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
647#endif
248 abort (); 648 abort ();
249 } 649 }
250 650
251 return ptr; 651 return ptr;
252} 652}
… …
254#define ev_malloc(size) ev_realloc (0, (size)) 654#define ev_malloc(size) ev_realloc (0, (size))
255#define ev_free(ptr) ev_realloc ((ptr), 0) 655#define ev_free(ptr) ev_realloc ((ptr), 0)
256 656
257/*****************************************************************************/ 657/*****************************************************************************/
258 658
659/* set in reify when reification needed */
660#define EV_ANFD_REIFY 1
661
662/* file descriptor info structure */
259typedef struct 663typedef struct
260{ 664{
261 WL head; 665 WL head;
262 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 */
263 unsigned char reify; 669 unsigned char unused;
670#if EV_USE_EPOLL
671 unsigned int egen; /* generation counter to counter epoll bugs */
672#endif
264#if EV_SELECT_IS_WINSOCKET 673#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
265 SOCKET handle; 674 SOCKET handle;
266#endif 675#endif
676#if EV_USE_IOCP
677 OVERLAPPED or, ow;
678#endif
267} ANFD; 679} ANFD;
268 680
681/* stores the pending event set for a given watcher */
269typedef struct 682typedef struct
270{ 683{
271 W w; 684 W w;
272 int events; 685 int events; /* the pending event set for the given watcher */
273} ANPENDING; 686} ANPENDING;
687
688#if EV_USE_INOTIFY
689/* hash table entry per inotify-id */
690typedef struct
691{
692 WL head;
693} ANFS;
694#endif
695
696/* Heap Entry */
697#if EV_HEAP_CACHE_AT
698 /* a heap element */
699 typedef struct {
700 ev_tstamp at;
701 WT w;
702 } ANHE;
703
704 #define ANHE_w(he) (he).w /* access watcher, read-write */
705 #define ANHE_at(he) (he).at /* access cached at, read-only */
706 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
707#else
708 /* a heap element */
709 typedef WT ANHE;
710
711 #define ANHE_w(he) (he)
712 #define ANHE_at(he) (he)->at
713 #define ANHE_at_cache(he)
714#endif
274 715
275#if EV_MULTIPLICITY 716#if EV_MULTIPLICITY
276 717
277 struct ev_loop 718 struct ev_loop
278 { 719 {
… …
296 737
297 static int ev_default_loop_ptr; 738 static int ev_default_loop_ptr;
298 739
299#endif 740#endif
300 741
742#if EV_FEATURE_API
743# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
744# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
745# define EV_INVOKE_PENDING invoke_cb (EV_A)
746#else
747# define EV_RELEASE_CB (void)0
748# define EV_ACQUIRE_CB (void)0
749# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
750#endif
751
752#define EVBREAK_RECURSE 0x80
753
301/*****************************************************************************/ 754/*****************************************************************************/
302 755
756#ifndef EV_HAVE_EV_TIME
303ev_tstamp 757ev_tstamp
304ev_time (void) 758ev_time (void)
305{ 759{
306#if EV_USE_REALTIME 760#if EV_USE_REALTIME
761 if (expect_true (have_realtime))
762 {
307 struct timespec ts; 763 struct timespec ts;
308 clock_gettime (CLOCK_REALTIME, &ts); 764 clock_gettime (CLOCK_REALTIME, &ts);
309 return ts.tv_sec + ts.tv_nsec * 1e-9; 765 return ts.tv_sec + ts.tv_nsec * 1e-9;
310#else 766 }
767#endif
768
311 struct timeval tv; 769 struct timeval tv;
312 gettimeofday (&tv, 0); 770 gettimeofday (&tv, 0);
313 return tv.tv_sec + tv.tv_usec * 1e-6; 771 return tv.tv_sec + tv.tv_usec * 1e-6;
314#endif
315} 772}
773#endif
316 774
317inline ev_tstamp 775inline_size ev_tstamp
318get_clock (void) 776get_clock (void)
319{ 777{
320#if EV_USE_MONOTONIC 778#if EV_USE_MONOTONIC
321 if (expect_true (have_monotonic)) 779 if (expect_true (have_monotonic))
322 { 780 {
… …
335{ 793{
336 return ev_rt_now; 794 return ev_rt_now;
337} 795}
338#endif 796#endif
339 797
340#define array_roundsize(type,n) (((n) | 4) & ~3) 798void
799ev_sleep (ev_tstamp delay)
800{
801 if (delay > 0.)
802 {
803#if EV_USE_NANOSLEEP
804 struct timespec ts;
805
806 EV_TS_SET (ts, delay);
807 nanosleep (&ts, 0);
808#elif defined(_WIN32)
809 Sleep ((unsigned long)(delay * 1e3));
810#else
811 struct timeval tv;
812
813 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
814 /* something not guaranteed by newer posix versions, but guaranteed */
815 /* by older ones */
816 EV_TV_SET (tv, delay);
817 select (0, 0, 0, 0, &tv);
818#endif
819 }
820}
821
822/*****************************************************************************/
823
824#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
825
826/* find a suitable new size for the given array, */
827/* hopefully by rounding to a nice-to-malloc size */
828inline_size int
829array_nextsize (int elem, int cur, int cnt)
830{
831 int ncur = cur + 1;
832
833 do
834 ncur <<= 1;
835 while (cnt > ncur);
836
837 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
838 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
839 {
840 ncur *= elem;
841 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
842 ncur = ncur - sizeof (void *) * 4;
843 ncur /= elem;
844 }
845
846 return ncur;
847}
848
849static noinline void *
850array_realloc (int elem, void *base, int *cur, int cnt)
851{
852 *cur = array_nextsize (elem, *cur, cnt);
853 return ev_realloc (base, elem * *cur);
854}
855
856#define array_init_zero(base,count) \
857 memset ((void *)(base), 0, sizeof (*(base)) * (count))
341 858
342#define array_needsize(type,base,cur,cnt,init) \ 859#define array_needsize(type,base,cur,cnt,init) \
343 if (expect_false ((cnt) > cur)) \ 860 if (expect_false ((cnt) > (cur))) \
344 { \ 861 { \
345 int newcnt = cur; \ 862 int ocur_ = (cur); \
346 do \ 863 (base) = (type *)array_realloc \
347 { \ 864 (sizeof (type), (base), &(cur), (cnt)); \
348 newcnt = array_roundsize (type, newcnt << 1); \ 865 init ((base) + (ocur_), (cur) - ocur_); \
349 } \
350 while ((cnt) > newcnt); \
351 \
352 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
353 init (base + cur, newcnt - cur); \
354 cur = newcnt; \
355 } 866 }
356 867
868#if 0
357#define array_slim(type,stem) \ 869#define array_slim(type,stem) \
358 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 870 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
359 { \ 871 { \
360 stem ## max = array_roundsize (stem ## cnt >> 1); \ 872 stem ## max = array_roundsize (stem ## cnt >> 1); \
361 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 873 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
362 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 874 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
363 } 875 }
876#endif
364 877
365#define array_free(stem, idx) \ 878#define array_free(stem, idx) \
366 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 879 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
367 880
368/*****************************************************************************/ 881/*****************************************************************************/
369 882
370static void 883/* dummy callback for pending events */
371anfds_init (ANFD *base, int count) 884static void noinline
885pendingcb (EV_P_ ev_prepare *w, int revents)
372{ 886{
373 while (count--)
374 {
375 base->head = 0;
376 base->events = EV_NONE;
377 base->reify = 0;
378
379 ++base;
380 }
381} 887}
382 888
383void 889void noinline
384ev_feed_event (EV_P_ void *w, int revents) 890ev_feed_event (EV_P_ void *w, int revents)
385{ 891{
386 W w_ = (W)w; 892 W w_ = (W)w;
893 int pri = ABSPRI (w_);
387 894
388 if (expect_false (w_->pending)) 895 if (expect_false (w_->pending))
896 pendings [pri][w_->pending - 1].events |= revents;
897 else
389 { 898 {
899 w_->pending = ++pendingcnt [pri];
900 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
901 pendings [pri][w_->pending - 1].w = w_;
390 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 902 pendings [pri][w_->pending - 1].events = revents;
391 return;
392 } 903 }
393
394 w_->pending = ++pendingcnt [ABSPRI (w_)];
395 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
396 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
397 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
398} 904}
399 905
400static void 906inline_speed void
907feed_reverse (EV_P_ W w)
908{
909 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
910 rfeeds [rfeedcnt++] = w;
911}
912
913inline_size void
914feed_reverse_done (EV_P_ int revents)
915{
916 do
917 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
918 while (rfeedcnt);
919}
920
921inline_speed void
401queue_events (EV_P_ W *events, int eventcnt, int type) 922queue_events (EV_P_ W *events, int eventcnt, int type)
402{ 923{
403 int i; 924 int i;
404 925
405 for (i = 0; i < eventcnt; ++i) 926 for (i = 0; i < eventcnt; ++i)
406 ev_feed_event (EV_A_ events [i], type); 927 ev_feed_event (EV_A_ events [i], type);
407} 928}
408 929
930/*****************************************************************************/
931
409inline void 932inline_speed void
410fd_event (EV_P_ int fd, int revents) 933fd_event_nocheck (EV_P_ int fd, int revents)
411{ 934{
412 ANFD *anfd = anfds + fd; 935 ANFD *anfd = anfds + fd;
413 struct ev_io *w; 936 ev_io *w;
414 937
415 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 938 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
416 { 939 {
417 int ev = w->events & revents; 940 int ev = w->events & revents;
418 941
419 if (ev) 942 if (ev)
420 ev_feed_event (EV_A_ (W)w, ev); 943 ev_feed_event (EV_A_ (W)w, ev);
421 } 944 }
422} 945}
423 946
947/* do not submit kernel events for fds that have reify set */
948/* because that means they changed while we were polling for new events */
949inline_speed void
950fd_event (EV_P_ int fd, int revents)
951{
952 ANFD *anfd = anfds + fd;
953
954 if (expect_true (!anfd->reify))
955 fd_event_nocheck (EV_A_ fd, revents);
956}
957
424void 958void
425ev_feed_fd_event (EV_P_ int fd, int revents) 959ev_feed_fd_event (EV_P_ int fd, int revents)
426{ 960{
961 if (fd >= 0 && fd < anfdmax)
427 fd_event (EV_A_ fd, revents); 962 fd_event_nocheck (EV_A_ fd, revents);
428} 963}
429 964
430/*****************************************************************************/ 965/* make sure the external fd watch events are in-sync */
431 966/* with the kernel/libev internal state */
432inline void 967inline_size void
433fd_reify (EV_P) 968fd_reify (EV_P)
434{ 969{
435 int i; 970 int i;
436 971
437 for (i = 0; i < fdchangecnt; ++i) 972 for (i = 0; i < fdchangecnt; ++i)
438 { 973 {
439 int fd = fdchanges [i]; 974 int fd = fdchanges [i];
440 ANFD *anfd = anfds + fd; 975 ANFD *anfd = anfds + fd;
441 struct ev_io *w; 976 ev_io *w;
442 977
443 int events = 0; 978 unsigned char o_events = anfd->events;
979 unsigned char o_reify = anfd->reify;
444 980
445 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 981 anfd->reify = 0;
446 events |= w->events;
447 982
448#if EV_SELECT_IS_WINSOCKET 983#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
449 if (events) 984 if (o_reify & EV__IOFDSET)
450 { 985 {
451 unsigned long argp; 986 unsigned long arg;
452 anfd->handle = _get_osfhandle (fd); 987 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
453 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 988 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989 printf ("oi %d %x\n", fd, anfd->handle);//D
454 } 990 }
455#endif 991#endif
456 992
457 anfd->reify = 0; 993 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
458 994 {
459 method_modify (EV_A_ fd, anfd->events, events);
460 anfd->events = events; 995 anfd->events = 0;
996
997 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
998 anfd->events |= (unsigned char)w->events;
999
1000 if (o_events != anfd->events)
1001 o_reify = EV__IOFDSET; /* actually |= */
1002 }
1003
1004 if (o_reify & EV__IOFDSET)
1005 backend_modify (EV_A_ fd, o_events, anfd->events);
461 } 1006 }
462 1007
463 fdchangecnt = 0; 1008 fdchangecnt = 0;
464} 1009}
465 1010
466static void 1011/* something about the given fd changed */
1012inline_size void
467fd_change (EV_P_ int fd) 1013fd_change (EV_P_ int fd, int flags)
468{ 1014{
469 if (expect_false (anfds [fd].reify)) 1015 unsigned char reify = anfds [fd].reify;
470 return;
471
472 anfds [fd].reify = 1; 1016 anfds [fd].reify |= flags;
473 1017
1018 if (expect_true (!reify))
1019 {
474 ++fdchangecnt; 1020 ++fdchangecnt;
475 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1021 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
476 fdchanges [fdchangecnt - 1] = fd; 1022 fdchanges [fdchangecnt - 1] = fd;
1023 }
477} 1024}
478 1025
479static void 1026/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027inline_speed void
480fd_kill (EV_P_ int fd) 1028fd_kill (EV_P_ int fd)
481{ 1029{
482 struct ev_io *w; 1030 ev_io *w;
483 1031
484 while ((w = (struct ev_io *)anfds [fd].head)) 1032 while ((w = (ev_io *)anfds [fd].head))
485 { 1033 {
486 ev_io_stop (EV_A_ w); 1034 ev_io_stop (EV_A_ w);
487 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1035 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
488 } 1036 }
489} 1037}
490 1038
1039/* check whether the given fd is actually valid, for error recovery */
491inline int 1040inline_size int
492fd_valid (int fd) 1041fd_valid (int fd)
493{ 1042{
494#ifdef _WIN32 1043#ifdef _WIN32
495 return _get_osfhandle (fd) != -1; 1044 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
496#else 1045#else
497 return fcntl (fd, F_GETFD) != -1; 1046 return fcntl (fd, F_GETFD) != -1;
498#endif 1047#endif
499} 1048}
500 1049
501/* called on EBADF to verify fds */ 1050/* called on EBADF to verify fds */
502static void 1051static void noinline
503fd_ebadf (EV_P) 1052fd_ebadf (EV_P)
504{ 1053{
505 int fd; 1054 int fd;
506 1055
507 for (fd = 0; fd < anfdmax; ++fd) 1056 for (fd = 0; fd < anfdmax; ++fd)
508 if (anfds [fd].events) 1057 if (anfds [fd].events)
509 if (!fd_valid (fd) == -1 && errno == EBADF) 1058 if (!fd_valid (fd) && errno == EBADF)
510 fd_kill (EV_A_ fd); 1059 fd_kill (EV_A_ fd);
511} 1060}
512 1061
513/* called on ENOMEM in select/poll to kill some fds and retry */ 1062/* called on ENOMEM in select/poll to kill some fds and retry */
514static void 1063static void noinline
515fd_enomem (EV_P) 1064fd_enomem (EV_P)
516{ 1065{
517 int fd; 1066 int fd;
518 1067
519 for (fd = anfdmax; fd--; ) 1068 for (fd = anfdmax; fd--; )
520 if (anfds [fd].events) 1069 if (anfds [fd].events)
521 { 1070 {
522 fd_kill (EV_A_ fd); 1071 fd_kill (EV_A_ fd);
523 return; 1072 break;
524 } 1073 }
525} 1074}
526 1075
527/* usually called after fork if method needs to re-arm all fds from scratch */ 1076/* usually called after fork if backend needs to re-arm all fds from scratch */
528static void 1077static void noinline
529fd_rearm_all (EV_P) 1078fd_rearm_all (EV_P)
530{ 1079{
531 int fd; 1080 int fd;
532 1081
533 /* this should be highly optimised to not do anything but set a flag */
534 for (fd = 0; fd < anfdmax; ++fd) 1082 for (fd = 0; fd < anfdmax; ++fd)
535 if (anfds [fd].events) 1083 if (anfds [fd].events)
536 { 1084 {
537 anfds [fd].events = 0; 1085 anfds [fd].events = 0;
538 fd_change (EV_A_ fd); 1086 anfds [fd].emask = 0;
1087 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
539 } 1088 }
540} 1089}
541 1090
542/*****************************************************************************/ 1091/* used to prepare libev internal fd's */
543 1092/* this is not fork-safe */
544static void
545upheap (WT *heap, int k)
546{
547 WT w = heap [k];
548
549 while (k && heap [k >> 1]->at > w->at)
550 {
551 heap [k] = heap [k >> 1];
552 ((W)heap [k])->active = k + 1;
553 k >>= 1;
554 }
555
556 heap [k] = w;
557 ((W)heap [k])->active = k + 1;
558
559}
560
561static void
562downheap (WT *heap, int N, int k)
563{
564 WT w = heap [k];
565
566 while (k < (N >> 1))
567 {
568 int j = k << 1;
569
570 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
571 ++j;
572
573 if (w->at <= heap [j]->at)
574 break;
575
576 heap [k] = heap [j];
577 ((W)heap [k])->active = k + 1;
578 k = j;
579 }
580
581 heap [k] = w;
582 ((W)heap [k])->active = k + 1;
583}
584
585inline void 1093inline_speed void
586adjustheap (WT *heap, int N, int k)
587{
588 upheap (heap, k);
589 downheap (heap, N, k);
590}
591
592/*****************************************************************************/
593
594typedef struct
595{
596 WL head;
597 sig_atomic_t volatile gotsig;
598} ANSIG;
599
600static ANSIG *signals;
601static int signalmax;
602
603static int sigpipe [2];
604static sig_atomic_t volatile gotsig;
605static struct ev_io sigev;
606
607static void
608signals_init (ANSIG *base, int count)
609{
610 while (count--)
611 {
612 base->head = 0;
613 base->gotsig = 0;
614
615 ++base;
616 }
617}
618
619static void
620sighandler (int signum)
621{
622#if _WIN32
623 signal (signum, sighandler);
624#endif
625
626 signals [signum - 1].gotsig = 1;
627
628 if (!gotsig)
629 {
630 int old_errno = errno;
631 gotsig = 1;
632 write (sigpipe [1], &signum, 1);
633 errno = old_errno;
634 }
635}
636
637void
638ev_feed_signal_event (EV_P_ int signum)
639{
640 WL w;
641
642#if EV_MULTIPLICITY
643 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
644#endif
645
646 --signum;
647
648 if (signum < 0 || signum >= signalmax)
649 return;
650
651 signals [signum].gotsig = 0;
652
653 for (w = signals [signum].head; w; w = w->next)
654 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
655}
656
657static void
658sigcb (EV_P_ struct ev_io *iow, int revents)
659{
660 int signum;
661
662 read (sigpipe [0], &revents, 1);
663 gotsig = 0;
664
665 for (signum = signalmax; signum--; )
666 if (signals [signum].gotsig)
667 ev_feed_signal_event (EV_A_ signum + 1);
668}
669
670static void
671fd_intern (int fd) 1094fd_intern (int fd)
672{ 1095{
673#ifdef _WIN32 1096#ifdef _WIN32
674 int arg = 1; 1097 unsigned long arg = 1;
675 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1098 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
676#else 1099#else
677 fcntl (fd, F_SETFD, FD_CLOEXEC); 1100 fcntl (fd, F_SETFD, FD_CLOEXEC);
678 fcntl (fd, F_SETFL, O_NONBLOCK); 1101 fcntl (fd, F_SETFL, O_NONBLOCK);
679#endif 1102#endif
680} 1103}
681 1104
1105/*****************************************************************************/
1106
1107/*
1108 * the heap functions want a real array index. array index 0 is guaranteed to not
1109 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1110 * the branching factor of the d-tree.
1111 */
1112
1113/*
1114 * at the moment we allow libev the luxury of two heaps,
1115 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1116 * which is more cache-efficient.
1117 * the difference is about 5% with 50000+ watchers.
1118 */
1119#if EV_USE_4HEAP
1120
1121#define DHEAP 4
1122#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1123#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1124#define UPHEAP_DONE(p,k) ((p) == (k))
1125
1126/* away from the root */
1127inline_speed void
1128downheap (ANHE *heap, int N, int k)
1129{
1130 ANHE he = heap [k];
1131 ANHE *E = heap + N + HEAP0;
1132
1133 for (;;)
1134 {
1135 ev_tstamp minat;
1136 ANHE *minpos;
1137 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1138
1139 /* find minimum child */
1140 if (expect_true (pos + DHEAP - 1 < E))
1141 {
1142 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1143 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1144 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1145 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1146 }
1147 else if (pos < E)
1148 {
1149 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1150 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1151 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1152 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1153 }
1154 else
1155 break;
1156
1157 if (ANHE_at (he) <= minat)
1158 break;
1159
1160 heap [k] = *minpos;
1161 ev_active (ANHE_w (*minpos)) = k;
1162
1163 k = minpos - heap;
1164 }
1165
1166 heap [k] = he;
1167 ev_active (ANHE_w (he)) = k;
1168}
1169
1170#else /* 4HEAP */
1171
1172#define HEAP0 1
1173#define HPARENT(k) ((k) >> 1)
1174#define UPHEAP_DONE(p,k) (!(p))
1175
1176/* away from the root */
1177inline_speed void
1178downheap (ANHE *heap, int N, int k)
1179{
1180 ANHE he = heap [k];
1181
1182 for (;;)
1183 {
1184 int c = k << 1;
1185
1186 if (c >= N + HEAP0)
1187 break;
1188
1189 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1190 ? 1 : 0;
1191
1192 if (ANHE_at (he) <= ANHE_at (heap [c]))
1193 break;
1194
1195 heap [k] = heap [c];
1196 ev_active (ANHE_w (heap [k])) = k;
1197
1198 k = c;
1199 }
1200
1201 heap [k] = he;
1202 ev_active (ANHE_w (he)) = k;
1203}
1204#endif
1205
1206/* towards the root */
1207inline_speed void
1208upheap (ANHE *heap, int k)
1209{
1210 ANHE he = heap [k];
1211
1212 for (;;)
1213 {
1214 int p = HPARENT (k);
1215
1216 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1217 break;
1218
1219 heap [k] = heap [p];
1220 ev_active (ANHE_w (heap [k])) = k;
1221 k = p;
1222 }
1223
1224 heap [k] = he;
1225 ev_active (ANHE_w (he)) = k;
1226}
1227
1228/* move an element suitably so it is in a correct place */
1229inline_size void
1230adjustheap (ANHE *heap, int N, int k)
1231{
1232 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1233 upheap (heap, k);
1234 else
1235 downheap (heap, N, k);
1236}
1237
1238/* rebuild the heap: this function is used only once and executed rarely */
1239inline_size void
1240reheap (ANHE *heap, int N)
1241{
1242 int i;
1243
1244 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1245 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1246 for (i = 0; i < N; ++i)
1247 upheap (heap, i + HEAP0);
1248}
1249
1250/*****************************************************************************/
1251
1252/* associate signal watchers to a signal signal */
1253typedef struct
1254{
1255 EV_ATOMIC_T pending;
1256#if EV_MULTIPLICITY
1257 EV_P;
1258#endif
1259 WL head;
1260} ANSIG;
1261
1262static ANSIG signals [EV_NSIG - 1];
1263
1264/*****************************************************************************/
1265
1266#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1267
1268static void noinline
1269evpipe_init (EV_P)
1270{
1271 if (!ev_is_active (&pipe_w))
1272 {
1273# if EV_USE_EVENTFD
1274 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1275 if (evfd < 0 && errno == EINVAL)
1276 evfd = eventfd (0, 0);
1277
1278 if (evfd >= 0)
1279 {
1280 evpipe [0] = -1;
1281 fd_intern (evfd); /* doing it twice doesn't hurt */
1282 ev_io_set (&pipe_w, evfd, EV_READ);
1283 }
1284 else
1285# endif
1286 {
1287 while (pipe (evpipe))
1288 ev_syserr ("(libev) error creating signal/async pipe");
1289
1290 fd_intern (evpipe [0]);
1291 fd_intern (evpipe [1]);
1292 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1293 }
1294
1295 ev_io_start (EV_A_ &pipe_w);
1296 ev_unref (EV_A); /* watcher should not keep loop alive */
1297 }
1298}
1299
1300inline_size void
1301evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302{
1303 if (!*flag)
1304 {
1305 int old_errno = errno; /* save errno because write might clobber it */
1306 char dummy;
1307
1308 *flag = 1;
1309
1310#if EV_USE_EVENTFD
1311 if (evfd >= 0)
1312 {
1313 uint64_t counter = 1;
1314 write (evfd, &counter, sizeof (uint64_t));
1315 }
1316 else
1317#endif
1318 /* win32 people keep sending patches that change this write() to send() */
1319 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320 /* so when you think this write should be a send instead, please find out */
1321 /* where your send() is from - it's definitely not the microsoft send, and */
1322 /* tell me. thank you. */
1323 write (evpipe [1], &dummy, 1);
1324
1325 errno = old_errno;
1326 }
1327}
1328
1329/* called whenever the libev signal pipe */
1330/* got some events (signal, async) */
682static void 1331static void
683siginit (EV_P) 1332pipecb (EV_P_ ev_io *iow, int revents)
684{ 1333{
685 fd_intern (sigpipe [0]); 1334 int i;
686 fd_intern (sigpipe [1]);
687 1335
688 ev_io_set (&sigev, sigpipe [0], EV_READ); 1336#if EV_USE_EVENTFD
689 ev_io_start (EV_A_ &sigev); 1337 if (evfd >= 0)
690 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1338 {
1339 uint64_t counter;
1340 read (evfd, &counter, sizeof (uint64_t));
1341 }
1342 else
1343#endif
1344 {
1345 char dummy;
1346 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1347 read (evpipe [0], &dummy, 1);
1348 }
1349
1350 if (sig_pending)
1351 {
1352 sig_pending = 0;
1353
1354 for (i = EV_NSIG - 1; i--; )
1355 if (expect_false (signals [i].pending))
1356 ev_feed_signal_event (EV_A_ i + 1);
1357 }
1358
1359#if EV_ASYNC_ENABLE
1360 if (async_pending)
1361 {
1362 async_pending = 0;
1363
1364 for (i = asynccnt; i--; )
1365 if (asyncs [i]->sent)
1366 {
1367 asyncs [i]->sent = 0;
1368 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1369 }
1370 }
1371#endif
691} 1372}
692 1373
693/*****************************************************************************/ 1374/*****************************************************************************/
694 1375
695static struct ev_child *childs [PID_HASHSIZE]; 1376static void
1377ev_sighandler (int signum)
1378{
1379#if EV_MULTIPLICITY
1380 EV_P = signals [signum - 1].loop;
1381#endif
696 1382
697#ifndef _WIN32 1383#ifdef _WIN32
1384 signal (signum, ev_sighandler);
1385#endif
698 1386
1387 signals [signum - 1].pending = 1;
1388 evpipe_write (EV_A_ &sig_pending);
1389}
1390
1391void noinline
1392ev_feed_signal_event (EV_P_ int signum)
1393{
1394 WL w;
1395
1396 if (expect_false (signum <= 0 || signum > EV_NSIG))
1397 return;
1398
1399 --signum;
1400
1401#if EV_MULTIPLICITY
1402 /* it is permissible to try to feed a signal to the wrong loop */
1403 /* or, likely more useful, feeding a signal nobody is waiting for */
1404
1405 if (expect_false (signals [signum].loop != EV_A))
1406 return;
1407#endif
1408
1409 signals [signum].pending = 0;
1410
1411 for (w = signals [signum].head; w; w = w->next)
1412 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1413}
1414
1415#if EV_USE_SIGNALFD
1416static void
1417sigfdcb (EV_P_ ev_io *iow, int revents)
1418{
1419 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1420
1421 for (;;)
1422 {
1423 ssize_t res = read (sigfd, si, sizeof (si));
1424
1425 /* not ISO-C, as res might be -1, but works with SuS */
1426 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1427 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1428
1429 if (res < (ssize_t)sizeof (si))
1430 break;
1431 }
1432}
1433#endif
1434
1435#endif
1436
1437/*****************************************************************************/
1438
1439#if EV_CHILD_ENABLE
1440static WL childs [EV_PID_HASHSIZE];
1441
699static struct ev_signal childev; 1442static ev_signal childev;
1443
1444#ifndef WIFCONTINUED
1445# define WIFCONTINUED(status) 0
1446#endif
1447
1448/* handle a single child status event */
1449inline_speed void
1450child_reap (EV_P_ int chain, int pid, int status)
1451{
1452 ev_child *w;
1453 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1454
1455 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1456 {
1457 if ((w->pid == pid || !w->pid)
1458 && (!traced || (w->flags & 1)))
1459 {
1460 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1461 w->rpid = pid;
1462 w->rstatus = status;
1463 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1464 }
1465 }
1466}
700 1467
701#ifndef WCONTINUED 1468#ifndef WCONTINUED
702# define WCONTINUED 0 1469# define WCONTINUED 0
703#endif 1470#endif
704 1471
1472/* called on sigchld etc., calls waitpid */
705static void 1473static void
706child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
707{
708 struct ev_child *w;
709
710 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
711 if (w->pid == pid || !w->pid)
712 {
713 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
714 w->rpid = pid;
715 w->rstatus = status;
716 ev_feed_event (EV_A_ (W)w, EV_CHILD);
717 }
718}
719
720static void
721childcb (EV_P_ struct ev_signal *sw, int revents) 1474childcb (EV_P_ ev_signal *sw, int revents)
722{ 1475{
723 int pid, status; 1476 int pid, status;
724 1477
1478 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
725 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1479 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
726 { 1480 if (!WCONTINUED
1481 || errno != EINVAL
1482 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1483 return;
1484
727 /* make sure we are called again until all childs have been reaped */ 1485 /* make sure we are called again until all children have been reaped */
1486 /* we need to do it this way so that the callback gets called before we continue */
728 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1487 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
729 1488
730 child_reap (EV_A_ sw, pid, pid, status); 1489 child_reap (EV_A_ pid, pid, status);
1490 if ((EV_PID_HASHSIZE) > 1)
731 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1491 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
732 }
733} 1492}
734 1493
735#endif 1494#endif
736 1495
737/*****************************************************************************/ 1496/*****************************************************************************/
738 1497
1498#if EV_USE_IOCP
1499# include "ev_iocp.c"
1500#endif
739#if EV_USE_PORT 1501#if EV_USE_PORT
740# include "ev_port.c" 1502# include "ev_port.c"
741#endif 1503#endif
742#if EV_USE_KQUEUE 1504#if EV_USE_KQUEUE
743# include "ev_kqueue.c" 1505# include "ev_kqueue.c"
… …
763{ 1525{
764 return EV_VERSION_MINOR; 1526 return EV_VERSION_MINOR;
765} 1527}
766 1528
767/* return true if we are running with elevated privileges and should ignore env variables */ 1529/* return true if we are running with elevated privileges and should ignore env variables */
768static int 1530int inline_size
769enable_secure (void) 1531enable_secure (void)
770{ 1532{
771#ifdef _WIN32 1533#ifdef _WIN32
772 return 0; 1534 return 0;
773#else 1535#else
… …
775 || getgid () != getegid (); 1537 || getgid () != getegid ();
776#endif 1538#endif
777} 1539}
778 1540
779unsigned int 1541unsigned int
1542ev_supported_backends (void)
1543{
1544 unsigned int flags = 0;
1545
1546 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1547 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1548 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1549 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1550 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1551
1552 return flags;
1553}
1554
1555unsigned int
1556ev_recommended_backends (void)
1557{
1558 unsigned int flags = ev_supported_backends ();
1559
1560#ifndef __NetBSD__
1561 /* kqueue is borked on everything but netbsd apparently */
1562 /* it usually doesn't work correctly on anything but sockets and pipes */
1563 flags &= ~EVBACKEND_KQUEUE;
1564#endif
1565#ifdef __APPLE__
1566 /* only select works correctly on that "unix-certified" platform */
1567 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1568 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1569#endif
1570#ifdef __FreeBSD__
1571 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1572#endif
1573
1574 return flags;
1575}
1576
1577unsigned int
1578ev_embeddable_backends (void)
1579{
1580 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1581
1582 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1583 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1584 flags &= ~EVBACKEND_EPOLL;
1585
1586 return flags;
1587}
1588
1589unsigned int
1590ev_backend (EV_P)
1591{
1592 return backend;
1593}
1594
1595#if EV_FEATURE_API
1596unsigned int
1597ev_iteration (EV_P)
1598{
1599 return loop_count;
1600}
1601
1602unsigned int
780ev_method (EV_P) 1603ev_depth (EV_P)
781{ 1604{
782 return method; 1605 return loop_depth;
783} 1606}
784 1607
785static void 1608void
1609ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1610{
1611 io_blocktime = interval;
1612}
1613
1614void
1615ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1616{
1617 timeout_blocktime = interval;
1618}
1619
1620void
1621ev_set_userdata (EV_P_ void *data)
1622{
1623 userdata = data;
1624}
1625
1626void *
1627ev_userdata (EV_P)
1628{
1629 return userdata;
1630}
1631
1632void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1633{
1634 invoke_cb = invoke_pending_cb;
1635}
1636
1637void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1638{
1639 release_cb = release;
1640 acquire_cb = acquire;
1641}
1642#endif
1643
1644/* initialise a loop structure, must be zero-initialised */
1645static void noinline
786loop_init (EV_P_ unsigned int flags) 1646loop_init (EV_P_ unsigned int flags)
787{ 1647{
788 if (!method) 1648 if (!backend)
789 { 1649 {
1650#if EV_USE_REALTIME
1651 if (!have_realtime)
1652 {
1653 struct timespec ts;
1654
1655 if (!clock_gettime (CLOCK_REALTIME, &ts))
1656 have_realtime = 1;
1657 }
1658#endif
1659
790#if EV_USE_MONOTONIC 1660#if EV_USE_MONOTONIC
1661 if (!have_monotonic)
791 { 1662 {
792 struct timespec ts; 1663 struct timespec ts;
1664
793 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1665 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
794 have_monotonic = 1; 1666 have_monotonic = 1;
795 } 1667 }
796#endif 1668#endif
797 1669
798 ev_rt_now = ev_time (); 1670 /* pid check not overridable via env */
799 mn_now = get_clock (); 1671#ifndef _WIN32
800 now_floor = mn_now; 1672 if (flags & EVFLAG_FORKCHECK)
801 rtmn_diff = ev_rt_now - mn_now; 1673 curpid = getpid ();
1674#endif
802 1675
803 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 1676 if (!(flags & EVFLAG_NOENV)
1677 && !enable_secure ()
1678 && getenv ("LIBEV_FLAGS"))
804 flags = atoi (getenv ("LIBEV_FLAGS")); 1679 flags = atoi (getenv ("LIBEV_FLAGS"));
805 1680
1681 ev_rt_now = ev_time ();
1682 mn_now = get_clock ();
1683 now_floor = mn_now;
1684 rtmn_diff = ev_rt_now - mn_now;
1685#if EV_FEATURE_API
1686 invoke_cb = ev_invoke_pending;
1687#endif
1688
1689 io_blocktime = 0.;
1690 timeout_blocktime = 0.;
1691 backend = 0;
1692 backend_fd = -1;
1693 sig_pending = 0;
1694#if EV_ASYNC_ENABLE
1695 async_pending = 0;
1696#endif
1697#if EV_USE_INOTIFY
1698 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699#endif
1700#if EV_USE_SIGNALFD
1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702#endif
1703
806 if (!(flags & 0x0000ffff)) 1704 if (!(flags & 0x0000ffffU))
807 flags |= 0x0000ffff; 1705 flags |= ev_recommended_backends ();
808 1706
809 method = 0; 1707#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif
810#if EV_USE_PORT 1710#if EV_USE_PORT
811 if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags); 1711 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
812#endif 1712#endif
813#if EV_USE_KQUEUE 1713#if EV_USE_KQUEUE
814 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); 1714 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
815#endif 1715#endif
816#if EV_USE_EPOLL 1716#if EV_USE_EPOLL
817 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); 1717 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
818#endif 1718#endif
819#if EV_USE_POLL 1719#if EV_USE_POLL
820 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); 1720 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
821#endif 1721#endif
822#if EV_USE_SELECT 1722#if EV_USE_SELECT
823 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); 1723 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
824#endif 1724#endif
825 1725
1726 ev_prepare_init (&pending_w, pendingcb);
1727
1728#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
826 ev_init (&sigev, sigcb); 1729 ev_init (&pipe_w, pipecb);
827 ev_set_priority (&sigev, EV_MAXPRI); 1730 ev_set_priority (&pipe_w, EV_MAXPRI);
1731#endif
828 } 1732 }
829} 1733}
830 1734
831static void 1735/* free up a loop structure */
1736static void noinline
832loop_destroy (EV_P) 1737loop_destroy (EV_P)
833{ 1738{
834 int i; 1739 int i;
835 1740
1741 if (ev_is_active (&pipe_w))
1742 {
1743 /*ev_ref (EV_A);*/
1744 /*ev_io_stop (EV_A_ &pipe_w);*/
1745
1746#if EV_USE_EVENTFD
1747 if (evfd >= 0)
1748 close (evfd);
1749#endif
1750
1751 if (evpipe [0] >= 0)
1752 {
1753 EV_WIN32_CLOSE_FD (evpipe [0]);
1754 EV_WIN32_CLOSE_FD (evpipe [1]);
1755 }
1756 }
1757
1758#if EV_USE_SIGNALFD
1759 if (ev_is_active (&sigfd_w))
1760 close (sigfd);
1761#endif
1762
1763#if EV_USE_INOTIFY
1764 if (fs_fd >= 0)
1765 close (fs_fd);
1766#endif
1767
1768 if (backend_fd >= 0)
1769 close (backend_fd);
1770
1771#if EV_USE_IOCP
1772 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1773#endif
836#if EV_USE_PORT 1774#if EV_USE_PORT
837 if (method == EVMETHOD_PORT ) port_destroy (EV_A); 1775 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
838#endif 1776#endif
839#if EV_USE_KQUEUE 1777#if EV_USE_KQUEUE
840 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1778 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
841#endif 1779#endif
842#if EV_USE_EPOLL 1780#if EV_USE_EPOLL
843 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1781 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
844#endif 1782#endif
845#if EV_USE_POLL 1783#if EV_USE_POLL
846 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1784 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
847#endif 1785#endif
848#if EV_USE_SELECT 1786#if EV_USE_SELECT
849 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1787 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
850#endif 1788#endif
851 1789
852 for (i = NUMPRI; i--; ) 1790 for (i = NUMPRI; i--; )
1791 {
853 array_free (pending, [i]); 1792 array_free (pending, [i]);
1793#if EV_IDLE_ENABLE
1794 array_free (idle, [i]);
1795#endif
1796 }
1797
1798 ev_free (anfds); anfds = 0; anfdmax = 0;
854 1799
855 /* have to use the microsoft-never-gets-it-right macro */ 1800 /* have to use the microsoft-never-gets-it-right macro */
1801 array_free (rfeed, EMPTY);
856 array_free (fdchange, EMPTY0); 1802 array_free (fdchange, EMPTY);
857 array_free (timer, EMPTY0); 1803 array_free (timer, EMPTY);
858#if EV_PERIODICS 1804#if EV_PERIODIC_ENABLE
859 array_free (periodic, EMPTY0); 1805 array_free (periodic, EMPTY);
860#endif 1806#endif
1807#if EV_FORK_ENABLE
861 array_free (idle, EMPTY0); 1808 array_free (fork, EMPTY);
1809#endif
862 array_free (prepare, EMPTY0); 1810 array_free (prepare, EMPTY);
863 array_free (check, EMPTY0); 1811 array_free (check, EMPTY);
1812#if EV_ASYNC_ENABLE
1813 array_free (async, EMPTY);
1814#endif
864 1815
865 method = 0; 1816 backend = 0;
866} 1817}
867 1818
868static void 1819#if EV_USE_INOTIFY
1820inline_size void infy_fork (EV_P);
1821#endif
1822
1823inline_size void
869loop_fork (EV_P) 1824loop_fork (EV_P)
870{ 1825{
871#if EV_USE_PORT 1826#if EV_USE_PORT
872 if (method == EVMETHOD_PORT ) port_fork (EV_A); 1827 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
873#endif 1828#endif
874#if EV_USE_KQUEUE 1829#if EV_USE_KQUEUE
875 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1830 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
876#endif 1831#endif
877#if EV_USE_EPOLL 1832#if EV_USE_EPOLL
878 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1833 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
879#endif 1834#endif
1835#if EV_USE_INOTIFY
1836 infy_fork (EV_A);
1837#endif
880 1838
881 if (ev_is_active (&sigev)) 1839 if (ev_is_active (&pipe_w))
882 { 1840 {
883 /* default loop */ 1841 /* this "locks" the handlers against writing to the pipe */
1842 /* while we modify the fd vars */
1843 sig_pending = 1;
1844#if EV_ASYNC_ENABLE
1845 async_pending = 1;
1846#endif
884 1847
885 ev_ref (EV_A); 1848 ev_ref (EV_A);
886 ev_io_stop (EV_A_ &sigev); 1849 ev_io_stop (EV_A_ &pipe_w);
887 close (sigpipe [0]);
888 close (sigpipe [1]);
889 1850
890 while (pipe (sigpipe)) 1851#if EV_USE_EVENTFD
891 syserr ("(libev) error creating pipe"); 1852 if (evfd >= 0)
1853 close (evfd);
1854#endif
892 1855
1856 if (evpipe [0] >= 0)
1857 {
1858 EV_WIN32_CLOSE_FD (evpipe [0]);
1859 EV_WIN32_CLOSE_FD (evpipe [1]);
1860 }
1861
1862#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
893 siginit (EV_A); 1863 evpipe_init (EV_A);
1864 /* now iterate over everything, in case we missed something */
1865 pipecb (EV_A_ &pipe_w, EV_READ);
1866#endif
894 } 1867 }
895 1868
896 postfork = 0; 1869 postfork = 0;
897} 1870}
898 1871
899#if EV_MULTIPLICITY 1872#if EV_MULTIPLICITY
1873
900struct ev_loop * 1874struct ev_loop *
901ev_loop_new (unsigned int flags) 1875ev_loop_new (unsigned int flags)
902{ 1876{
903 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1877 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
904 1878
905 memset (loop, 0, sizeof (struct ev_loop)); 1879 memset (EV_A, 0, sizeof (struct ev_loop));
906
907 loop_init (EV_A_ flags); 1880 loop_init (EV_A_ flags);
908 1881
909 if (ev_method (EV_A)) 1882 if (ev_backend (EV_A))
910 return loop; 1883 return EV_A;
911 1884
912 return 0; 1885 return 0;
913} 1886}
914 1887
915void 1888void
… …
920} 1893}
921 1894
922void 1895void
923ev_loop_fork (EV_P) 1896ev_loop_fork (EV_P)
924{ 1897{
925 postfork = 1; 1898 postfork = 1; /* must be in line with ev_default_fork */
926} 1899}
1900#endif /* multiplicity */
927 1901
1902#if EV_VERIFY
1903static void noinline
1904verify_watcher (EV_P_ W w)
1905{
1906 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1907
1908 if (w->pending)
1909 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1910}
1911
1912static void noinline
1913verify_heap (EV_P_ ANHE *heap, int N)
1914{
1915 int i;
1916
1917 for (i = HEAP0; i < N + HEAP0; ++i)
1918 {
1919 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1920 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1921 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1922
1923 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1924 }
1925}
1926
1927static void noinline
1928array_verify (EV_P_ W *ws, int cnt)
1929{
1930 while (cnt--)
1931 {
1932 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1933 verify_watcher (EV_A_ ws [cnt]);
1934 }
1935}
1936#endif
1937
1938#if EV_FEATURE_API
1939void
1940ev_verify (EV_P)
1941{
1942#if EV_VERIFY
1943 int i;
1944 WL w;
1945
1946 assert (activecnt >= -1);
1947
1948 assert (fdchangemax >= fdchangecnt);
1949 for (i = 0; i < fdchangecnt; ++i)
1950 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1951
1952 assert (anfdmax >= 0);
1953 for (i = 0; i < anfdmax; ++i)
1954 for (w = anfds [i].head; w; w = w->next)
1955 {
1956 verify_watcher (EV_A_ (W)w);
1957 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1958 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1959 }
1960
1961 assert (timermax >= timercnt);
1962 verify_heap (EV_A_ timers, timercnt);
1963
1964#if EV_PERIODIC_ENABLE
1965 assert (periodicmax >= periodiccnt);
1966 verify_heap (EV_A_ periodics, periodiccnt);
1967#endif
1968
1969 for (i = NUMPRI; i--; )
1970 {
1971 assert (pendingmax [i] >= pendingcnt [i]);
1972#if EV_IDLE_ENABLE
1973 assert (idleall >= 0);
1974 assert (idlemax [i] >= idlecnt [i]);
1975 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1976#endif
1977 }
1978
1979#if EV_FORK_ENABLE
1980 assert (forkmax >= forkcnt);
1981 array_verify (EV_A_ (W *)forks, forkcnt);
1982#endif
1983
1984#if EV_ASYNC_ENABLE
1985 assert (asyncmax >= asynccnt);
1986 array_verify (EV_A_ (W *)asyncs, asynccnt);
1987#endif
1988
1989#if EV_PREPARE_ENABLE
1990 assert (preparemax >= preparecnt);
1991 array_verify (EV_A_ (W *)prepares, preparecnt);
1992#endif
1993
1994#if EV_CHECK_ENABLE
1995 assert (checkmax >= checkcnt);
1996 array_verify (EV_A_ (W *)checks, checkcnt);
1997#endif
1998
1999# if 0
2000#if EV_CHILD_ENABLE
2001 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2002 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2003#endif
2004# endif
2005#endif
2006}
928#endif 2007#endif
929 2008
930#if EV_MULTIPLICITY 2009#if EV_MULTIPLICITY
931struct ev_loop * 2010struct ev_loop *
932ev_default_loop_init (unsigned int flags) 2011ev_default_loop_init (unsigned int flags)
933#else 2012#else
934int 2013int
935ev_default_loop (unsigned int flags) 2014ev_default_loop (unsigned int flags)
936#endif 2015#endif
937{ 2016{
938 if (sigpipe [0] == sigpipe [1])
939 if (pipe (sigpipe))
940 return 0;
941
942 if (!ev_default_loop_ptr) 2017 if (!ev_default_loop_ptr)
943 { 2018 {
944#if EV_MULTIPLICITY 2019#if EV_MULTIPLICITY
945 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2020 EV_P = ev_default_loop_ptr = &default_loop_struct;
946#else 2021#else
947 ev_default_loop_ptr = 1; 2022 ev_default_loop_ptr = 1;
948#endif 2023#endif
949 2024
950 loop_init (EV_A_ flags); 2025 loop_init (EV_A_ flags);
951 2026
952 if (ev_method (EV_A)) 2027 if (ev_backend (EV_A))
953 { 2028 {
954 siginit (EV_A); 2029#if EV_CHILD_ENABLE
955
956#ifndef _WIN32
957 ev_signal_init (&childev, childcb, SIGCHLD); 2030 ev_signal_init (&childev, childcb, SIGCHLD);
958 ev_set_priority (&childev, EV_MAXPRI); 2031 ev_set_priority (&childev, EV_MAXPRI);
959 ev_signal_start (EV_A_ &childev); 2032 ev_signal_start (EV_A_ &childev);
960 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2033 ev_unref (EV_A); /* child watcher should not keep loop alive */
961#endif 2034#endif
… …
969 2042
970void 2043void
971ev_default_destroy (void) 2044ev_default_destroy (void)
972{ 2045{
973#if EV_MULTIPLICITY 2046#if EV_MULTIPLICITY
974 struct ev_loop *loop = ev_default_loop_ptr; 2047 EV_P = ev_default_loop_ptr;
975#endif 2048#endif
976 2049
977#ifndef _WIN32 2050 ev_default_loop_ptr = 0;
2051
2052#if EV_CHILD_ENABLE
978 ev_ref (EV_A); /* child watcher */ 2053 ev_ref (EV_A); /* child watcher */
979 ev_signal_stop (EV_A_ &childev); 2054 ev_signal_stop (EV_A_ &childev);
980#endif 2055#endif
981 2056
982 ev_ref (EV_A); /* signal watcher */
983 ev_io_stop (EV_A_ &sigev);
984
985 close (sigpipe [0]); sigpipe [0] = 0;
986 close (sigpipe [1]); sigpipe [1] = 0;
987
988 loop_destroy (EV_A); 2057 loop_destroy (EV_A);
989} 2058}
990 2059
991void 2060void
992ev_default_fork (void) 2061ev_default_fork (void)
993{ 2062{
994#if EV_MULTIPLICITY 2063#if EV_MULTIPLICITY
995 struct ev_loop *loop = ev_default_loop_ptr; 2064 EV_P = ev_default_loop_ptr;
996#endif 2065#endif
997 2066
998 if (method) 2067 postfork = 1; /* must be in line with ev_loop_fork */
999 postfork = 1;
1000} 2068}
1001 2069
1002/*****************************************************************************/ 2070/*****************************************************************************/
1003 2071
1004static int 2072void
1005any_pending (EV_P) 2073ev_invoke (EV_P_ void *w, int revents)
2074{
2075 EV_CB_INVOKE ((W)w, revents);
2076}
2077
2078unsigned int
2079ev_pending_count (EV_P)
1006{ 2080{
1007 int pri; 2081 int pri;
2082 unsigned int count = 0;
1008 2083
1009 for (pri = NUMPRI; pri--; ) 2084 for (pri = NUMPRI; pri--; )
1010 if (pendingcnt [pri]) 2085 count += pendingcnt [pri];
1011 return 1;
1012 2086
1013 return 0; 2087 return count;
1014} 2088}
1015 2089
1016inline void 2090void noinline
1017call_pending (EV_P) 2091ev_invoke_pending (EV_P)
1018{ 2092{
1019 int pri; 2093 int pri;
1020 2094
1021 for (pri = NUMPRI; pri--; ) 2095 for (pri = NUMPRI; pri--; )
1022 while (pendingcnt [pri]) 2096 while (pendingcnt [pri])
1023 { 2097 {
1024 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2098 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1025 2099
1026 if (expect_true (p->w)) 2100 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1027 { 2101 /* ^ this is no longer true, as pending_w could be here */
2102
1028 p->w->pending = 0; 2103 p->w->pending = 0;
1029 EV_CB_INVOKE (p->w, p->events); 2104 EV_CB_INVOKE (p->w, p->events);
1030 } 2105 EV_FREQUENT_CHECK;
1031 } 2106 }
1032} 2107}
1033 2108
2109#if EV_IDLE_ENABLE
2110/* make idle watchers pending. this handles the "call-idle */
2111/* only when higher priorities are idle" logic */
1034inline void 2112inline_size void
2113idle_reify (EV_P)
2114{
2115 if (expect_false (idleall))
2116 {
2117 int pri;
2118
2119 for (pri = NUMPRI; pri--; )
2120 {
2121 if (pendingcnt [pri])
2122 break;
2123
2124 if (idlecnt [pri])
2125 {
2126 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2127 break;
2128 }
2129 }
2130 }
2131}
2132#endif
2133
2134/* make timers pending */
2135inline_size void
1035timers_reify (EV_P) 2136timers_reify (EV_P)
1036{ 2137{
2138 EV_FREQUENT_CHECK;
2139
1037 while (timercnt && ((WT)timers [0])->at <= mn_now) 2140 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1038 { 2141 {
1039 struct ev_timer *w = timers [0]; 2142 do
1040
1041 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1042
1043 /* first reschedule or stop timer */
1044 if (w->repeat)
1045 { 2143 {
2144 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2145
2146 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2147
2148 /* first reschedule or stop timer */
2149 if (w->repeat)
2150 {
2151 ev_at (w) += w->repeat;
2152 if (ev_at (w) < mn_now)
2153 ev_at (w) = mn_now;
2154
1046 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2155 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1047 2156
1048 ((WT)w)->at += w->repeat; 2157 ANHE_at_cache (timers [HEAP0]);
1049 if (((WT)w)->at < mn_now)
1050 ((WT)w)->at = mn_now;
1051
1052 downheap ((WT *)timers, timercnt, 0); 2158 downheap (timers, timercnt, HEAP0);
2159 }
2160 else
2161 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2162
2163 EV_FREQUENT_CHECK;
2164 feed_reverse (EV_A_ (W)w);
1053 } 2165 }
1054 else 2166 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1055 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1056 2167
1057 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2168 feed_reverse_done (EV_A_ EV_TIMER);
1058 } 2169 }
1059} 2170}
1060 2171
1061#if EV_PERIODICS 2172#if EV_PERIODIC_ENABLE
2173/* make periodics pending */
1062inline void 2174inline_size void
1063periodics_reify (EV_P) 2175periodics_reify (EV_P)
1064{ 2176{
2177 EV_FREQUENT_CHECK;
2178
1065 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2179 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1066 { 2180 {
1067 struct ev_periodic *w = periodics [0]; 2181 int feed_count = 0;
1068 2182
2183 do
2184 {
2185 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2186
1069 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2187 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1070 2188
1071 /* first reschedule or stop timer */ 2189 /* first reschedule or stop timer */
2190 if (w->reschedule_cb)
2191 {
2192 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2193
2194 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2195
2196 ANHE_at_cache (periodics [HEAP0]);
2197 downheap (periodics, periodiccnt, HEAP0);
2198 }
2199 else if (w->interval)
2200 {
2201 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2202 /* if next trigger time is not sufficiently in the future, put it there */
2203 /* this might happen because of floating point inexactness */
2204 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2205 {
2206 ev_at (w) += w->interval;
2207
2208 /* if interval is unreasonably low we might still have a time in the past */
2209 /* so correct this. this will make the periodic very inexact, but the user */
2210 /* has effectively asked to get triggered more often than possible */
2211 if (ev_at (w) < ev_rt_now)
2212 ev_at (w) = ev_rt_now;
2213 }
2214
2215 ANHE_at_cache (periodics [HEAP0]);
2216 downheap (periodics, periodiccnt, HEAP0);
2217 }
2218 else
2219 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2220
2221 EV_FREQUENT_CHECK;
2222 feed_reverse (EV_A_ (W)w);
2223 }
2224 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2225
2226 feed_reverse_done (EV_A_ EV_PERIODIC);
2227 }
2228}
2229
2230/* simply recalculate all periodics */
2231/* TODO: maybe ensure that at least one event happens when jumping forward? */
2232static void noinline
2233periodics_reschedule (EV_P)
2234{
2235 int i;
2236
2237 /* adjust periodics after time jump */
2238 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2239 {
2240 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2241
1072 if (w->reschedule_cb) 2242 if (w->reschedule_cb)
2243 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2244 else if (w->interval)
2245 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2246
2247 ANHE_at_cache (periodics [i]);
2248 }
2249
2250 reheap (periodics, periodiccnt);
2251}
2252#endif
2253
2254/* adjust all timers by a given offset */
2255static void noinline
2256timers_reschedule (EV_P_ ev_tstamp adjust)
2257{
2258 int i;
2259
2260 for (i = 0; i < timercnt; ++i)
2261 {
2262 ANHE *he = timers + i + HEAP0;
2263 ANHE_w (*he)->at += adjust;
2264 ANHE_at_cache (*he);
2265 }
2266}
2267
2268/* fetch new monotonic and realtime times from the kernel */
2269/* also detect if there was a timejump, and act accordingly */
2270inline_speed void
2271time_update (EV_P_ ev_tstamp max_block)
2272{
2273#if EV_USE_MONOTONIC
2274 if (expect_true (have_monotonic))
2275 {
2276 int i;
2277 ev_tstamp odiff = rtmn_diff;
2278
2279 mn_now = get_clock ();
2280
2281 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2282 /* interpolate in the meantime */
2283 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1073 { 2284 {
1074 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2285 ev_rt_now = rtmn_diff + mn_now;
1075 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2286 return;
1076 downheap ((WT *)periodics, periodiccnt, 0);
1077 } 2287 }
1078 else if (w->interval)
1079 {
1080 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1081 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1082 downheap ((WT *)periodics, periodiccnt, 0);
1083 }
1084 else
1085 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1086 2288
1087 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1088 }
1089}
1090
1091static void
1092periodics_reschedule (EV_P)
1093{
1094 int i;
1095
1096 /* adjust periodics after time jump */
1097 for (i = 0; i < periodiccnt; ++i)
1098 {
1099 struct ev_periodic *w = periodics [i];
1100
1101 if (w->reschedule_cb)
1102 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1103 else if (w->interval)
1104 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1105 }
1106
1107 /* now rebuild the heap */
1108 for (i = periodiccnt >> 1; i--; )
1109 downheap ((WT *)periodics, periodiccnt, i);
1110}
1111#endif
1112
1113inline int
1114time_update_monotonic (EV_P)
1115{
1116 mn_now = get_clock ();
1117
1118 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1119 {
1120 ev_rt_now = rtmn_diff + mn_now;
1121 return 0;
1122 }
1123 else
1124 {
1125 now_floor = mn_now; 2289 now_floor = mn_now;
1126 ev_rt_now = ev_time (); 2290 ev_rt_now = ev_time ();
1127 return 1;
1128 }
1129}
1130 2291
1131inline void 2292 /* loop a few times, before making important decisions.
1132time_update (EV_P) 2293 * on the choice of "4": one iteration isn't enough,
1133{ 2294 * in case we get preempted during the calls to
1134 int i; 2295 * ev_time and get_clock. a second call is almost guaranteed
1135 2296 * to succeed in that case, though. and looping a few more times
1136#if EV_USE_MONOTONIC 2297 * doesn't hurt either as we only do this on time-jumps or
1137 if (expect_true (have_monotonic)) 2298 * in the unlikely event of having been preempted here.
1138 { 2299 */
1139 if (time_update_monotonic (EV_A)) 2300 for (i = 4; --i; )
1140 { 2301 {
1141 ev_tstamp odiff = rtmn_diff;
1142
1143 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1144 {
1145 rtmn_diff = ev_rt_now - mn_now; 2302 rtmn_diff = ev_rt_now - mn_now;
1146 2303
1147 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2304 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1148 return; /* all is well */ 2305 return; /* all is well */
1149 2306
1150 ev_rt_now = ev_time (); 2307 ev_rt_now = ev_time ();
1151 mn_now = get_clock (); 2308 mn_now = get_clock ();
1152 now_floor = mn_now; 2309 now_floor = mn_now;
1153 } 2310 }
1154 2311
2312 /* no timer adjustment, as the monotonic clock doesn't jump */
2313 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1155# if EV_PERIODICS 2314# if EV_PERIODIC_ENABLE
2315 periodics_reschedule (EV_A);
2316# endif
2317 }
2318 else
2319#endif
2320 {
2321 ev_rt_now = ev_time ();
2322
2323 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2324 {
2325 /* adjust timers. this is easy, as the offset is the same for all of them */
2326 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2327#if EV_PERIODIC_ENABLE
1156 periodics_reschedule (EV_A); 2328 periodics_reschedule (EV_A);
1157# endif 2329#endif
1158 /* no timer adjustment, as the monotonic clock doesn't jump */
1159 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1160 } 2330 }
1161 }
1162 else
1163#endif
1164 {
1165 ev_rt_now = ev_time ();
1166
1167 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1168 {
1169#if EV_PERIODICS
1170 periodics_reschedule (EV_A);
1171#endif
1172
1173 /* adjust timers. this is easy, as the offset is the same for all */
1174 for (i = 0; i < timercnt; ++i)
1175 ((WT)timers [i])->at += ev_rt_now - mn_now;
1176 }
1177 2331
1178 mn_now = ev_rt_now; 2332 mn_now = ev_rt_now;
1179 } 2333 }
1180} 2334}
1181 2335
1182void 2336void
1183ev_ref (EV_P)
1184{
1185 ++activecnt;
1186}
1187
1188void
1189ev_unref (EV_P)
1190{
1191 --activecnt;
1192}
1193
1194static int loop_done;
1195
1196void
1197ev_loop (EV_P_ int flags) 2337ev_run (EV_P_ int flags)
1198{ 2338{
1199 double block; 2339#if EV_FEATURE_API
1200 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2340 ++loop_depth;
2341#endif
1201 2342
1202 while (activecnt) 2343 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2344
2345 loop_done = EVBREAK_CANCEL;
2346
2347 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2348
2349 do
1203 { 2350 {
2351#if EV_VERIFY >= 2
2352 ev_verify (EV_A);
2353#endif
2354
2355#ifndef _WIN32
2356 if (expect_false (curpid)) /* penalise the forking check even more */
2357 if (expect_false (getpid () != curpid))
2358 {
2359 curpid = getpid ();
2360 postfork = 1;
2361 }
2362#endif
2363
2364#if EV_FORK_ENABLE
2365 /* we might have forked, so queue fork handlers */
2366 if (expect_false (postfork))
2367 if (forkcnt)
2368 {
2369 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2370 EV_INVOKE_PENDING;
2371 }
2372#endif
2373
2374#if EV_PREPARE_ENABLE
1204 /* queue check watchers (and execute them) */ 2375 /* queue prepare watchers (and execute them) */
1205 if (expect_false (preparecnt)) 2376 if (expect_false (preparecnt))
1206 { 2377 {
1207 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2378 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1208 call_pending (EV_A); 2379 EV_INVOKE_PENDING;
1209 } 2380 }
2381#endif
2382
2383 if (expect_false (loop_done))
2384 break;
1210 2385
1211 /* we might have forked, so reify kernel state if necessary */ 2386 /* we might have forked, so reify kernel state if necessary */
1212 if (expect_false (postfork)) 2387 if (expect_false (postfork))
1213 loop_fork (EV_A); 2388 loop_fork (EV_A);
1214 2389
1215 /* update fd-related kernel structures */ 2390 /* update fd-related kernel structures */
1216 fd_reify (EV_A); 2391 fd_reify (EV_A);
1217 2392
1218 /* calculate blocking time */ 2393 /* calculate blocking time */
2394 {
2395 ev_tstamp waittime = 0.;
2396 ev_tstamp sleeptime = 0.;
1219 2397
1220 /* we only need this for !monotonic clock or timers, but as we basically 2398 /* remember old timestamp for io_blocktime calculation */
1221 always have timers, we just calculate it always */ 2399 ev_tstamp prev_mn_now = mn_now;
1222#if EV_USE_MONOTONIC 2400
1223 if (expect_true (have_monotonic)) 2401 /* update time to cancel out callback processing overhead */
1224 time_update_monotonic (EV_A); 2402 time_update (EV_A_ 1e100);
1225 else 2403
1226#endif 2404 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1227 { 2405 {
1228 ev_rt_now = ev_time ();
1229 mn_now = ev_rt_now;
1230 }
1231
1232 if (flags & EVLOOP_NONBLOCK || idlecnt)
1233 block = 0.;
1234 else
1235 {
1236 block = MAX_BLOCKTIME; 2406 waittime = MAX_BLOCKTIME;
1237 2407
1238 if (timercnt) 2408 if (timercnt)
1239 { 2409 {
1240 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2410 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1241 if (block > to) block = to; 2411 if (waittime > to) waittime = to;
1242 } 2412 }
1243 2413
1244#if EV_PERIODICS 2414#if EV_PERIODIC_ENABLE
1245 if (periodiccnt) 2415 if (periodiccnt)
1246 { 2416 {
1247 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2417 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1248 if (block > to) block = to; 2418 if (waittime > to) waittime = to;
1249 } 2419 }
1250#endif 2420#endif
1251 2421
1252 if (expect_false (block < 0.)) block = 0.; 2422 /* don't let timeouts decrease the waittime below timeout_blocktime */
2423 if (expect_false (waittime < timeout_blocktime))
2424 waittime = timeout_blocktime;
2425
2426 /* extra check because io_blocktime is commonly 0 */
2427 if (expect_false (io_blocktime))
2428 {
2429 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2430
2431 if (sleeptime > waittime - backend_fudge)
2432 sleeptime = waittime - backend_fudge;
2433
2434 if (expect_true (sleeptime > 0.))
2435 {
2436 ev_sleep (sleeptime);
2437 waittime -= sleeptime;
2438 }
2439 }
1253 } 2440 }
1254 2441
1255 method_poll (EV_A_ block); 2442#if EV_FEATURE_API
2443 ++loop_count;
2444#endif
2445 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2446 backend_poll (EV_A_ waittime);
2447 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1256 2448
1257 /* update ev_rt_now, do magic */ 2449 /* update ev_rt_now, do magic */
1258 time_update (EV_A); 2450 time_update (EV_A_ waittime + sleeptime);
2451 }
1259 2452
1260 /* queue pending timers and reschedule them */ 2453 /* queue pending timers and reschedule them */
1261 timers_reify (EV_A); /* relative timers called last */ 2454 timers_reify (EV_A); /* relative timers called last */
1262#if EV_PERIODICS 2455#if EV_PERIODIC_ENABLE
1263 periodics_reify (EV_A); /* absolute timers called first */ 2456 periodics_reify (EV_A); /* absolute timers called first */
1264#endif 2457#endif
1265 2458
2459#if EV_IDLE_ENABLE
1266 /* queue idle watchers unless io or timers are pending */ 2460 /* queue idle watchers unless other events are pending */
1267 if (idlecnt && !any_pending (EV_A)) 2461 idle_reify (EV_A);
1268 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2462#endif
1269 2463
2464#if EV_CHECK_ENABLE
1270 /* queue check watchers, to be executed first */ 2465 /* queue check watchers, to be executed first */
1271 if (expect_false (checkcnt)) 2466 if (expect_false (checkcnt))
1272 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2467 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2468#endif
1273 2469
1274 call_pending (EV_A); 2470 EV_INVOKE_PENDING;
1275
1276 if (expect_false (loop_done))
1277 break;
1278 } 2471 }
2472 while (expect_true (
2473 activecnt
2474 && !loop_done
2475 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2476 ));
1279 2477
1280 if (loop_done != 2) 2478 if (loop_done == EVBREAK_ONE)
1281 loop_done = 0; 2479 loop_done = EVBREAK_CANCEL;
1282}
1283 2480
2481#if EV_FEATURE_API
2482 --loop_depth;
2483#endif
2484}
2485
1284void 2486void
1285ev_unloop (EV_P_ int how) 2487ev_break (EV_P_ int how)
1286{ 2488{
1287 loop_done = how; 2489 loop_done = how;
1288} 2490}
1289 2491
2492void
2493ev_ref (EV_P)
2494{
2495 ++activecnt;
2496}
2497
2498void
2499ev_unref (EV_P)
2500{
2501 --activecnt;
2502}
2503
2504void
2505ev_now_update (EV_P)
2506{
2507 time_update (EV_A_ 1e100);
2508}
2509
2510void
2511ev_suspend (EV_P)
2512{
2513 ev_now_update (EV_A);
2514}
2515
2516void
2517ev_resume (EV_P)
2518{
2519 ev_tstamp mn_prev = mn_now;
2520
2521 ev_now_update (EV_A);
2522 timers_reschedule (EV_A_ mn_now - mn_prev);
2523#if EV_PERIODIC_ENABLE
2524 /* TODO: really do this? */
2525 periodics_reschedule (EV_A);
2526#endif
2527}
2528
1290/*****************************************************************************/ 2529/*****************************************************************************/
2530/* singly-linked list management, used when the expected list length is short */
1291 2531
1292inline void 2532inline_size void
1293wlist_add (WL *head, WL elem) 2533wlist_add (WL *head, WL elem)
1294{ 2534{
1295 elem->next = *head; 2535 elem->next = *head;
1296 *head = elem; 2536 *head = elem;
1297} 2537}
1298 2538
1299inline void 2539inline_size void
1300wlist_del (WL *head, WL elem) 2540wlist_del (WL *head, WL elem)
1301{ 2541{
1302 while (*head) 2542 while (*head)
1303 { 2543 {
1304 if (*head == elem) 2544 if (expect_true (*head == elem))
1305 { 2545 {
1306 *head = elem->next; 2546 *head = elem->next;
1307 return; 2547 break;
1308 } 2548 }
1309 2549
1310 head = &(*head)->next; 2550 head = &(*head)->next;
1311 } 2551 }
1312} 2552}
1313 2553
2554/* internal, faster, version of ev_clear_pending */
1314inline void 2555inline_speed void
1315ev_clear_pending (EV_P_ W w) 2556clear_pending (EV_P_ W w)
1316{ 2557{
1317 if (w->pending) 2558 if (w->pending)
1318 { 2559 {
1319 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2560 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1320 w->pending = 0; 2561 w->pending = 0;
1321 } 2562 }
1322} 2563}
1323 2564
2565int
2566ev_clear_pending (EV_P_ void *w)
2567{
2568 W w_ = (W)w;
2569 int pending = w_->pending;
2570
2571 if (expect_true (pending))
2572 {
2573 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2574 p->w = (W)&pending_w;
2575 w_->pending = 0;
2576 return p->events;
2577 }
2578 else
2579 return 0;
2580}
2581
1324inline void 2582inline_size void
2583pri_adjust (EV_P_ W w)
2584{
2585 int pri = ev_priority (w);
2586 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2587 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2588 ev_set_priority (w, pri);
2589}
2590
2591inline_speed void
1325ev_start (EV_P_ W w, int active) 2592ev_start (EV_P_ W w, int active)
1326{ 2593{
1327 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2594 pri_adjust (EV_A_ w);
1328 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1329
1330 w->active = active; 2595 w->active = active;
1331 ev_ref (EV_A); 2596 ev_ref (EV_A);
1332} 2597}
1333 2598
1334inline void 2599inline_size void
1335ev_stop (EV_P_ W w) 2600ev_stop (EV_P_ W w)
1336{ 2601{
1337 ev_unref (EV_A); 2602 ev_unref (EV_A);
1338 w->active = 0; 2603 w->active = 0;
1339} 2604}
1340 2605
1341/*****************************************************************************/ 2606/*****************************************************************************/
1342 2607
1343void 2608void noinline
1344ev_io_start (EV_P_ struct ev_io *w) 2609ev_io_start (EV_P_ ev_io *w)
1345{ 2610{
1346 int fd = w->fd; 2611 int fd = w->fd;
1347 2612
1348 if (expect_false (ev_is_active (w))) 2613 if (expect_false (ev_is_active (w)))
1349 return; 2614 return;
1350 2615
1351 assert (("ev_io_start called with negative fd", fd >= 0)); 2616 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2617 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2618
2619 EV_FREQUENT_CHECK;
1352 2620
1353 ev_start (EV_A_ (W)w, 1); 2621 ev_start (EV_A_ (W)w, 1);
1354 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2622 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1355 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2623 wlist_add (&anfds[fd].head, (WL)w);
1356 2624
1357 fd_change (EV_A_ fd); 2625 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1358} 2626 w->events &= ~EV__IOFDSET;
1359 2627
1360void 2628 EV_FREQUENT_CHECK;
2629}
2630
2631void noinline
1361ev_io_stop (EV_P_ struct ev_io *w) 2632ev_io_stop (EV_P_ ev_io *w)
1362{ 2633{
1363 ev_clear_pending (EV_A_ (W)w); 2634 clear_pending (EV_A_ (W)w);
1364 if (expect_false (!ev_is_active (w))) 2635 if (expect_false (!ev_is_active (w)))
1365 return; 2636 return;
1366 2637
1367 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2638 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1368 2639
2640 EV_FREQUENT_CHECK;
2641
1369 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2642 wlist_del (&anfds[w->fd].head, (WL)w);
1370 ev_stop (EV_A_ (W)w); 2643 ev_stop (EV_A_ (W)w);
1371 2644
1372 fd_change (EV_A_ w->fd); 2645 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1373}
1374 2646
1375void 2647 EV_FREQUENT_CHECK;
2648}
2649
2650void noinline
1376ev_timer_start (EV_P_ struct ev_timer *w) 2651ev_timer_start (EV_P_ ev_timer *w)
1377{ 2652{
1378 if (expect_false (ev_is_active (w))) 2653 if (expect_false (ev_is_active (w)))
1379 return; 2654 return;
1380 2655
1381 ((WT)w)->at += mn_now; 2656 ev_at (w) += mn_now;
1382 2657
1383 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2658 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1384 2659
2660 EV_FREQUENT_CHECK;
2661
2662 ++timercnt;
1385 ev_start (EV_A_ (W)w, ++timercnt); 2663 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1386 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 2664 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1387 timers [timercnt - 1] = w; 2665 ANHE_w (timers [ev_active (w)]) = (WT)w;
1388 upheap ((WT *)timers, timercnt - 1); 2666 ANHE_at_cache (timers [ev_active (w)]);
2667 upheap (timers, ev_active (w));
1389 2668
2669 EV_FREQUENT_CHECK;
2670
1390 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2671 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1391} 2672}
1392 2673
1393void 2674void noinline
1394ev_timer_stop (EV_P_ struct ev_timer *w) 2675ev_timer_stop (EV_P_ ev_timer *w)
1395{ 2676{
1396 ev_clear_pending (EV_A_ (W)w); 2677 clear_pending (EV_A_ (W)w);
1397 if (expect_false (!ev_is_active (w))) 2678 if (expect_false (!ev_is_active (w)))
1398 return; 2679 return;
1399 2680
2681 EV_FREQUENT_CHECK;
2682
2683 {
2684 int active = ev_active (w);
2685
1400 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2686 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1401 2687
2688 --timercnt;
2689
1402 if (expect_true (((W)w)->active < timercnt--)) 2690 if (expect_true (active < timercnt + HEAP0))
1403 { 2691 {
1404 timers [((W)w)->active - 1] = timers [timercnt]; 2692 timers [active] = timers [timercnt + HEAP0];
1405 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2693 adjustheap (timers, timercnt, active);
1406 } 2694 }
2695 }
1407 2696
1408 ((WT)w)->at -= mn_now; 2697 ev_at (w) -= mn_now;
1409 2698
1410 ev_stop (EV_A_ (W)w); 2699 ev_stop (EV_A_ (W)w);
1411}
1412 2700
1413void 2701 EV_FREQUENT_CHECK;
2702}
2703
2704void noinline
1414ev_timer_again (EV_P_ struct ev_timer *w) 2705ev_timer_again (EV_P_ ev_timer *w)
1415{ 2706{
2707 EV_FREQUENT_CHECK;
2708
1416 if (ev_is_active (w)) 2709 if (ev_is_active (w))
1417 { 2710 {
1418 if (w->repeat) 2711 if (w->repeat)
1419 { 2712 {
1420 ((WT)w)->at = mn_now + w->repeat; 2713 ev_at (w) = mn_now + w->repeat;
2714 ANHE_at_cache (timers [ev_active (w)]);
1421 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2715 adjustheap (timers, timercnt, ev_active (w));
1422 } 2716 }
1423 else 2717 else
1424 ev_timer_stop (EV_A_ w); 2718 ev_timer_stop (EV_A_ w);
1425 } 2719 }
1426 else if (w->repeat) 2720 else if (w->repeat)
1427 { 2721 {
1428 w->at = w->repeat; 2722 ev_at (w) = w->repeat;
1429 ev_timer_start (EV_A_ w); 2723 ev_timer_start (EV_A_ w);
1430 } 2724 }
1431}
1432 2725
2726 EV_FREQUENT_CHECK;
2727}
2728
2729ev_tstamp
2730ev_timer_remaining (EV_P_ ev_timer *w)
2731{
2732 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2733}
2734
1433#if EV_PERIODICS 2735#if EV_PERIODIC_ENABLE
1434void 2736void noinline
1435ev_periodic_start (EV_P_ struct ev_periodic *w) 2737ev_periodic_start (EV_P_ ev_periodic *w)
1436{ 2738{
1437 if (expect_false (ev_is_active (w))) 2739 if (expect_false (ev_is_active (w)))
1438 return; 2740 return;
1439 2741
1440 if (w->reschedule_cb) 2742 if (w->reschedule_cb)
1441 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2743 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1442 else if (w->interval) 2744 else if (w->interval)
1443 { 2745 {
1444 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2746 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1445 /* this formula differs from the one in periodic_reify because we do not always round up */ 2747 /* this formula differs from the one in periodic_reify because we do not always round up */
1446 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2748 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1447 } 2749 }
2750 else
2751 ev_at (w) = w->offset;
1448 2752
2753 EV_FREQUENT_CHECK;
2754
2755 ++periodiccnt;
1449 ev_start (EV_A_ (W)w, ++periodiccnt); 2756 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1450 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2757 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1451 periodics [periodiccnt - 1] = w; 2758 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1452 upheap ((WT *)periodics, periodiccnt - 1); 2759 ANHE_at_cache (periodics [ev_active (w)]);
2760 upheap (periodics, ev_active (w));
1453 2761
2762 EV_FREQUENT_CHECK;
2763
1454 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2764 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1455} 2765}
1456 2766
1457void 2767void noinline
1458ev_periodic_stop (EV_P_ struct ev_periodic *w) 2768ev_periodic_stop (EV_P_ ev_periodic *w)
1459{ 2769{
1460 ev_clear_pending (EV_A_ (W)w); 2770 clear_pending (EV_A_ (W)w);
1461 if (expect_false (!ev_is_active (w))) 2771 if (expect_false (!ev_is_active (w)))
1462 return; 2772 return;
1463 2773
2774 EV_FREQUENT_CHECK;
2775
2776 {
2777 int active = ev_active (w);
2778
1464 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2779 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1465 2780
2781 --periodiccnt;
2782
1466 if (expect_true (((W)w)->active < periodiccnt--)) 2783 if (expect_true (active < periodiccnt + HEAP0))
1467 { 2784 {
1468 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2785 periodics [active] = periodics [periodiccnt + HEAP0];
1469 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2786 adjustheap (periodics, periodiccnt, active);
1470 } 2787 }
2788 }
1471 2789
1472 ev_stop (EV_A_ (W)w); 2790 ev_stop (EV_A_ (W)w);
1473}
1474 2791
1475void 2792 EV_FREQUENT_CHECK;
2793}
2794
2795void noinline
1476ev_periodic_again (EV_P_ struct ev_periodic *w) 2796ev_periodic_again (EV_P_ ev_periodic *w)
1477{ 2797{
1478 /* TODO: use adjustheap and recalculation */ 2798 /* TODO: use adjustheap and recalculation */
1479 ev_periodic_stop (EV_A_ w); 2799 ev_periodic_stop (EV_A_ w);
1480 ev_periodic_start (EV_A_ w); 2800 ev_periodic_start (EV_A_ w);
1481} 2801}
1482#endif 2802#endif
1483 2803
1484void 2804#ifndef SA_RESTART
1485ev_idle_start (EV_P_ struct ev_idle *w) 2805# define SA_RESTART 0
2806#endif
2807
2808#if EV_SIGNAL_ENABLE
2809
2810void noinline
2811ev_signal_start (EV_P_ ev_signal *w)
1486{ 2812{
1487 if (expect_false (ev_is_active (w))) 2813 if (expect_false (ev_is_active (w)))
1488 return; 2814 return;
1489 2815
2816 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2817
2818#if EV_MULTIPLICITY
2819 assert (("libev: a signal must not be attached to two different loops",
2820 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2821
2822 signals [w->signum - 1].loop = EV_A;
2823#endif
2824
2825 EV_FREQUENT_CHECK;
2826
2827#if EV_USE_SIGNALFD
2828 if (sigfd == -2)
2829 {
2830 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2831 if (sigfd < 0 && errno == EINVAL)
2832 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2833
2834 if (sigfd >= 0)
2835 {
2836 fd_intern (sigfd); /* doing it twice will not hurt */
2837
2838 sigemptyset (&sigfd_set);
2839
2840 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2841 ev_set_priority (&sigfd_w, EV_MAXPRI);
2842 ev_io_start (EV_A_ &sigfd_w);
2843 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2844 }
2845 }
2846
2847 if (sigfd >= 0)
2848 {
2849 /* TODO: check .head */
2850 sigaddset (&sigfd_set, w->signum);
2851 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2852
2853 signalfd (sigfd, &sigfd_set, 0);
2854 }
2855#endif
2856
1490 ev_start (EV_A_ (W)w, ++idlecnt); 2857 ev_start (EV_A_ (W)w, 1);
1491 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2); 2858 wlist_add (&signals [w->signum - 1].head, (WL)w);
1492 idles [idlecnt - 1] = w;
1493}
1494 2859
1495void 2860 if (!((WL)w)->next)
1496ev_idle_stop (EV_P_ struct ev_idle *w) 2861# if EV_USE_SIGNALFD
2862 if (sigfd < 0) /*TODO*/
2863# endif
2864 {
2865# ifdef _WIN32
2866 evpipe_init (EV_A);
2867
2868 signal (w->signum, ev_sighandler);
2869# else
2870 struct sigaction sa;
2871
2872 evpipe_init (EV_A);
2873
2874 sa.sa_handler = ev_sighandler;
2875 sigfillset (&sa.sa_mask);
2876 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2877 sigaction (w->signum, &sa, 0);
2878
2879 sigemptyset (&sa.sa_mask);
2880 sigaddset (&sa.sa_mask, w->signum);
2881 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2882#endif
2883 }
2884
2885 EV_FREQUENT_CHECK;
2886}
2887
2888void noinline
2889ev_signal_stop (EV_P_ ev_signal *w)
1497{ 2890{
1498 ev_clear_pending (EV_A_ (W)w); 2891 clear_pending (EV_A_ (W)w);
1499 if (expect_false (!ev_is_active (w))) 2892 if (expect_false (!ev_is_active (w)))
1500 return; 2893 return;
1501 2894
1502 idles [((W)w)->active - 1] = idles [--idlecnt]; 2895 EV_FREQUENT_CHECK;
2896
2897 wlist_del (&signals [w->signum - 1].head, (WL)w);
1503 ev_stop (EV_A_ (W)w); 2898 ev_stop (EV_A_ (W)w);
1504}
1505 2899
2900 if (!signals [w->signum - 1].head)
2901 {
2902#if EV_MULTIPLICITY
2903 signals [w->signum - 1].loop = 0; /* unattach from signal */
2904#endif
2905#if EV_USE_SIGNALFD
2906 if (sigfd >= 0)
2907 {
2908 sigset_t ss;
2909
2910 sigemptyset (&ss);
2911 sigaddset (&ss, w->signum);
2912 sigdelset (&sigfd_set, w->signum);
2913
2914 signalfd (sigfd, &sigfd_set, 0);
2915 sigprocmask (SIG_UNBLOCK, &ss, 0);
2916 }
2917 else
2918#endif
2919 signal (w->signum, SIG_DFL);
2920 }
2921
2922 EV_FREQUENT_CHECK;
2923}
2924
2925#endif
2926
2927#if EV_CHILD_ENABLE
2928
1506void 2929void
1507ev_prepare_start (EV_P_ struct ev_prepare *w) 2930ev_child_start (EV_P_ ev_child *w)
1508{ 2931{
2932#if EV_MULTIPLICITY
2933 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2934#endif
1509 if (expect_false (ev_is_active (w))) 2935 if (expect_false (ev_is_active (w)))
1510 return; 2936 return;
1511 2937
2938 EV_FREQUENT_CHECK;
2939
1512 ev_start (EV_A_ (W)w, ++preparecnt); 2940 ev_start (EV_A_ (W)w, 1);
1513 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 2941 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1514 prepares [preparecnt - 1] = w;
1515}
1516 2942
2943 EV_FREQUENT_CHECK;
2944}
2945
1517void 2946void
1518ev_prepare_stop (EV_P_ struct ev_prepare *w) 2947ev_child_stop (EV_P_ ev_child *w)
1519{ 2948{
1520 ev_clear_pending (EV_A_ (W)w); 2949 clear_pending (EV_A_ (W)w);
1521 if (expect_false (!ev_is_active (w))) 2950 if (expect_false (!ev_is_active (w)))
1522 return; 2951 return;
1523 2952
1524 prepares [((W)w)->active - 1] = prepares [--preparecnt]; 2953 EV_FREQUENT_CHECK;
2954
2955 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1525 ev_stop (EV_A_ (W)w); 2956 ev_stop (EV_A_ (W)w);
1526}
1527 2957
2958 EV_FREQUENT_CHECK;
2959}
2960
2961#endif
2962
2963#if EV_STAT_ENABLE
2964
2965# ifdef _WIN32
2966# undef lstat
2967# define lstat(a,b) _stati64 (a,b)
2968# endif
2969
2970#define DEF_STAT_INTERVAL 5.0074891
2971#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2972#define MIN_STAT_INTERVAL 0.1074891
2973
2974static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2975
2976#if EV_USE_INOTIFY
2977
2978/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2979# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2980
2981static void noinline
2982infy_add (EV_P_ ev_stat *w)
2983{
2984 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);
2985
2986 if (w->wd >= 0)
2987 {
2988 struct statfs sfs;
2989
2990 /* now local changes will be tracked by inotify, but remote changes won't */
2991 /* unless the filesystem is known to be local, we therefore still poll */
2992 /* also do poll on <2.6.25, but with normal frequency */
2993
2994 if (!fs_2625)
2995 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2996 else if (!statfs (w->path, &sfs)
2997 && (sfs.f_type == 0x1373 /* devfs */
2998 || sfs.f_type == 0xEF53 /* ext2/3 */
2999 || sfs.f_type == 0x3153464a /* jfs */
3000 || sfs.f_type == 0x52654973 /* reiser3 */
3001 || sfs.f_type == 0x01021994 /* tempfs */
3002 || sfs.f_type == 0x58465342 /* xfs */))
3003 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3004 else
3005 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3006 }
3007 else
3008 {
3009 /* can't use inotify, continue to stat */
3010 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3011
3012 /* if path is not there, monitor some parent directory for speedup hints */
3013 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3014 /* but an efficiency issue only */
3015 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3016 {
3017 char path [4096];
3018 strcpy (path, w->path);
3019
3020 do
3021 {
3022 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3023 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3024
3025 char *pend = strrchr (path, '/');
3026
3027 if (!pend || pend == path)
3028 break;
3029
3030 *pend = 0;
3031 w->wd = inotify_add_watch (fs_fd, path, mask);
3032 }
3033 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3034 }
3035 }
3036
3037 if (w->wd >= 0)
3038 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3039
3040 /* now re-arm timer, if required */
3041 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3042 ev_timer_again (EV_A_ &w->timer);
3043 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3044}
3045
3046static void noinline
3047infy_del (EV_P_ ev_stat *w)
3048{
3049 int slot;
3050 int wd = w->wd;
3051
3052 if (wd < 0)
3053 return;
3054
3055 w->wd = -2;
3056 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3057 wlist_del (&fs_hash [slot].head, (WL)w);
3058
3059 /* remove this watcher, if others are watching it, they will rearm */
3060 inotify_rm_watch (fs_fd, wd);
3061}
3062
3063static void noinline
3064infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3065{
3066 if (slot < 0)
3067 /* overflow, need to check for all hash slots */
3068 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3069 infy_wd (EV_A_ slot, wd, ev);
3070 else
3071 {
3072 WL w_;
3073
3074 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3075 {
3076 ev_stat *w = (ev_stat *)w_;
3077 w_ = w_->next; /* lets us remove this watcher and all before it */
3078
3079 if (w->wd == wd || wd == -1)
3080 {
3081 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3082 {
3083 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3084 w->wd = -1;
3085 infy_add (EV_A_ w); /* re-add, no matter what */
3086 }
3087
3088 stat_timer_cb (EV_A_ &w->timer, 0);
3089 }
3090 }
3091 }
3092}
3093
3094static void
3095infy_cb (EV_P_ ev_io *w, int revents)
3096{
3097 char buf [EV_INOTIFY_BUFSIZE];
3098 int ofs;
3099 int len = read (fs_fd, buf, sizeof (buf));
3100
3101 for (ofs = 0; ofs < len; )
3102 {
3103 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3104 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3105 ofs += sizeof (struct inotify_event) + ev->len;
3106 }
3107}
3108
3109inline_size void
3110ev_check_2625 (EV_P)
3111{
3112 /* kernels < 2.6.25 are borked
3113 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3114 */
3115 if (ev_linux_version () < 0x020619)
3116 return;
3117
3118 fs_2625 = 1;
3119}
3120
3121inline_size int
3122infy_newfd (void)
3123{
3124#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3125 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3126 if (fd >= 0)
3127 return fd;
3128#endif
3129 return inotify_init ();
3130}
3131
3132inline_size void
3133infy_init (EV_P)
3134{
3135 if (fs_fd != -2)
3136 return;
3137
3138 fs_fd = -1;
3139
3140 ev_check_2625 (EV_A);
3141
3142 fs_fd = infy_newfd ();
3143
3144 if (fs_fd >= 0)
3145 {
3146 fd_intern (fs_fd);
3147 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3148 ev_set_priority (&fs_w, EV_MAXPRI);
3149 ev_io_start (EV_A_ &fs_w);
3150 ev_unref (EV_A);
3151 }
3152}
3153
3154inline_size void
3155infy_fork (EV_P)
3156{
3157 int slot;
3158
3159 if (fs_fd < 0)
3160 return;
3161
3162 ev_ref (EV_A);
3163 ev_io_stop (EV_A_ &fs_w);
3164 close (fs_fd);
3165 fs_fd = infy_newfd ();
3166
3167 if (fs_fd >= 0)
3168 {
3169 fd_intern (fs_fd);
3170 ev_io_set (&fs_w, fs_fd, EV_READ);
3171 ev_io_start (EV_A_ &fs_w);
3172 ev_unref (EV_A);
3173 }
3174
3175 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3176 {
3177 WL w_ = fs_hash [slot].head;
3178 fs_hash [slot].head = 0;
3179
3180 while (w_)
3181 {
3182 ev_stat *w = (ev_stat *)w_;
3183 w_ = w_->next; /* lets us add this watcher */
3184
3185 w->wd = -1;
3186
3187 if (fs_fd >= 0)
3188 infy_add (EV_A_ w); /* re-add, no matter what */
3189 else
3190 {
3191 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3192 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3193 ev_timer_again (EV_A_ &w->timer);
3194 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3195 }
3196 }
3197 }
3198}
3199
3200#endif
3201
3202#ifdef _WIN32
3203# define EV_LSTAT(p,b) _stati64 (p, b)
3204#else
3205# define EV_LSTAT(p,b) lstat (p, b)
3206#endif
3207
1528void 3208void
1529ev_check_start (EV_P_ struct ev_check *w) 3209ev_stat_stat (EV_P_ ev_stat *w)
3210{
3211 if (lstat (w->path, &w->attr) < 0)
3212 w->attr.st_nlink = 0;
3213 else if (!w->attr.st_nlink)
3214 w->attr.st_nlink = 1;
3215}
3216
3217static void noinline
3218stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3219{
3220 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3221
3222 ev_statdata prev = w->attr;
3223 ev_stat_stat (EV_A_ w);
3224
3225 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3226 if (
3227 prev.st_dev != w->attr.st_dev
3228 || prev.st_ino != w->attr.st_ino
3229 || prev.st_mode != w->attr.st_mode
3230 || prev.st_nlink != w->attr.st_nlink
3231 || prev.st_uid != w->attr.st_uid
3232 || prev.st_gid != w->attr.st_gid
3233 || prev.st_rdev != w->attr.st_rdev
3234 || prev.st_size != w->attr.st_size
3235 || prev.st_atime != w->attr.st_atime
3236 || prev.st_mtime != w->attr.st_mtime
3237 || prev.st_ctime != w->attr.st_ctime
3238 ) {
3239 /* we only update w->prev on actual differences */
3240 /* in case we test more often than invoke the callback, */
3241 /* to ensure that prev is always different to attr */
3242 w->prev = prev;
3243
3244 #if EV_USE_INOTIFY
3245 if (fs_fd >= 0)
3246 {
3247 infy_del (EV_A_ w);
3248 infy_add (EV_A_ w);
3249 ev_stat_stat (EV_A_ w); /* avoid race... */
3250 }
3251 #endif
3252
3253 ev_feed_event (EV_A_ w, EV_STAT);
3254 }
3255}
3256
3257void
3258ev_stat_start (EV_P_ ev_stat *w)
1530{ 3259{
1531 if (expect_false (ev_is_active (w))) 3260 if (expect_false (ev_is_active (w)))
1532 return; 3261 return;
1533 3262
3263 ev_stat_stat (EV_A_ w);
3264
3265 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3266 w->interval = MIN_STAT_INTERVAL;
3267
3268 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3269 ev_set_priority (&w->timer, ev_priority (w));
3270
3271#if EV_USE_INOTIFY
3272 infy_init (EV_A);
3273
3274 if (fs_fd >= 0)
3275 infy_add (EV_A_ w);
3276 else
3277#endif
3278 {
3279 ev_timer_again (EV_A_ &w->timer);
3280 ev_unref (EV_A);
3281 }
3282
1534 ev_start (EV_A_ (W)w, ++checkcnt); 3283 ev_start (EV_A_ (W)w, 1);
1535 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1536 checks [checkcnt - 1] = w;
1537}
1538 3284
3285 EV_FREQUENT_CHECK;
3286}
3287
1539void 3288void
1540ev_check_stop (EV_P_ struct ev_check *w) 3289ev_stat_stop (EV_P_ ev_stat *w)
1541{ 3290{
1542 ev_clear_pending (EV_A_ (W)w); 3291 clear_pending (EV_A_ (W)w);
1543 if (expect_false (!ev_is_active (w))) 3292 if (expect_false (!ev_is_active (w)))
1544 return; 3293 return;
1545 3294
1546 checks [((W)w)->active - 1] = checks [--checkcnt]; 3295 EV_FREQUENT_CHECK;
3296
3297#if EV_USE_INOTIFY
3298 infy_del (EV_A_ w);
3299#endif
3300
3301 if (ev_is_active (&w->timer))
3302 {
3303 ev_ref (EV_A);
3304 ev_timer_stop (EV_A_ &w->timer);
3305 }
3306
1547 ev_stop (EV_A_ (W)w); 3307 ev_stop (EV_A_ (W)w);
1548}
1549 3308
1550#ifndef SA_RESTART 3309 EV_FREQUENT_CHECK;
1551# define SA_RESTART 0 3310}
1552#endif 3311#endif
1553 3312
3313#if EV_IDLE_ENABLE
1554void 3314void
1555ev_signal_start (EV_P_ struct ev_signal *w) 3315ev_idle_start (EV_P_ ev_idle *w)
1556{ 3316{
1557#if EV_MULTIPLICITY
1558 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1559#endif
1560 if (expect_false (ev_is_active (w))) 3317 if (expect_false (ev_is_active (w)))
1561 return; 3318 return;
1562 3319
1563 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3320 pri_adjust (EV_A_ (W)w);
1564 3321
3322 EV_FREQUENT_CHECK;
3323
3324 {
3325 int active = ++idlecnt [ABSPRI (w)];
3326
3327 ++idleall;
1565 ev_start (EV_A_ (W)w, 1); 3328 ev_start (EV_A_ (W)w, active);
1566 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1567 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1568 3329
1569 if (!((WL)w)->next) 3330 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1570 { 3331 idles [ABSPRI (w)][active - 1] = w;
1571#if _WIN32
1572 signal (w->signum, sighandler);
1573#else
1574 struct sigaction sa;
1575 sa.sa_handler = sighandler;
1576 sigfillset (&sa.sa_mask);
1577 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1578 sigaction (w->signum, &sa, 0);
1579#endif
1580 } 3332 }
1581}
1582 3333
3334 EV_FREQUENT_CHECK;
3335}
3336
1583void 3337void
1584ev_signal_stop (EV_P_ struct ev_signal *w) 3338ev_idle_stop (EV_P_ ev_idle *w)
1585{ 3339{
1586 ev_clear_pending (EV_A_ (W)w); 3340 clear_pending (EV_A_ (W)w);
1587 if (expect_false (!ev_is_active (w))) 3341 if (expect_false (!ev_is_active (w)))
1588 return; 3342 return;
1589 3343
1590 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3344 EV_FREQUENT_CHECK;
3345
3346 {
3347 int active = ev_active (w);
3348
3349 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3350 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3351
1591 ev_stop (EV_A_ (W)w); 3352 ev_stop (EV_A_ (W)w);
3353 --idleall;
3354 }
1592 3355
1593 if (!signals [w->signum - 1].head) 3356 EV_FREQUENT_CHECK;
1594 signal (w->signum, SIG_DFL);
1595} 3357}
1596
1597void
1598ev_child_start (EV_P_ struct ev_child *w)
1599{
1600#if EV_MULTIPLICITY
1601 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1602#endif 3358#endif
3359
3360#if EV_PREPARE_ENABLE
3361void
3362ev_prepare_start (EV_P_ ev_prepare *w)
3363{
1603 if (expect_false (ev_is_active (w))) 3364 if (expect_false (ev_is_active (w)))
1604 return; 3365 return;
1605 3366
3367 EV_FREQUENT_CHECK;
3368
1606 ev_start (EV_A_ (W)w, 1); 3369 ev_start (EV_A_ (W)w, ++preparecnt);
1607 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3370 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1608} 3371 prepares [preparecnt - 1] = w;
1609 3372
3373 EV_FREQUENT_CHECK;
3374}
3375
1610void 3376void
1611ev_child_stop (EV_P_ struct ev_child *w) 3377ev_prepare_stop (EV_P_ ev_prepare *w)
1612{ 3378{
1613 ev_clear_pending (EV_A_ (W)w); 3379 clear_pending (EV_A_ (W)w);
1614 if (expect_false (!ev_is_active (w))) 3380 if (expect_false (!ev_is_active (w)))
1615 return; 3381 return;
1616 3382
1617 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3383 EV_FREQUENT_CHECK;
3384
3385 {
3386 int active = ev_active (w);
3387
3388 prepares [active - 1] = prepares [--preparecnt];
3389 ev_active (prepares [active - 1]) = active;
3390 }
3391
1618 ev_stop (EV_A_ (W)w); 3392 ev_stop (EV_A_ (W)w);
3393
3394 EV_FREQUENT_CHECK;
1619} 3395}
3396#endif
3397
3398#if EV_CHECK_ENABLE
3399void
3400ev_check_start (EV_P_ ev_check *w)
3401{
3402 if (expect_false (ev_is_active (w)))
3403 return;
3404
3405 EV_FREQUENT_CHECK;
3406
3407 ev_start (EV_A_ (W)w, ++checkcnt);
3408 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3409 checks [checkcnt - 1] = w;
3410
3411 EV_FREQUENT_CHECK;
3412}
3413
3414void
3415ev_check_stop (EV_P_ ev_check *w)
3416{
3417 clear_pending (EV_A_ (W)w);
3418 if (expect_false (!ev_is_active (w)))
3419 return;
3420
3421 EV_FREQUENT_CHECK;
3422
3423 {
3424 int active = ev_active (w);
3425
3426 checks [active - 1] = checks [--checkcnt];
3427 ev_active (checks [active - 1]) = active;
3428 }
3429
3430 ev_stop (EV_A_ (W)w);
3431
3432 EV_FREQUENT_CHECK;
3433}
3434#endif
3435
3436#if EV_EMBED_ENABLE
3437void noinline
3438ev_embed_sweep (EV_P_ ev_embed *w)
3439{
3440 ev_run (w->other, EVRUN_NOWAIT);
3441}
3442
3443static void
3444embed_io_cb (EV_P_ ev_io *io, int revents)
3445{
3446 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3447
3448 if (ev_cb (w))
3449 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3450 else
3451 ev_run (w->other, EVRUN_NOWAIT);
3452}
3453
3454static void
3455embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3456{
3457 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3458
3459 {
3460 EV_P = w->other;
3461
3462 while (fdchangecnt)
3463 {
3464 fd_reify (EV_A);
3465 ev_run (EV_A_ EVRUN_NOWAIT);
3466 }
3467 }
3468}
3469
3470static void
3471embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3472{
3473 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3474
3475 ev_embed_stop (EV_A_ w);
3476
3477 {
3478 EV_P = w->other;
3479
3480 ev_loop_fork (EV_A);
3481 ev_run (EV_A_ EVRUN_NOWAIT);
3482 }
3483
3484 ev_embed_start (EV_A_ w);
3485}
3486
3487#if 0
3488static void
3489embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3490{
3491 ev_idle_stop (EV_A_ idle);
3492}
3493#endif
3494
3495void
3496ev_embed_start (EV_P_ ev_embed *w)
3497{
3498 if (expect_false (ev_is_active (w)))
3499 return;
3500
3501 {
3502 EV_P = w->other;
3503 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3504 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3505 }
3506
3507 EV_FREQUENT_CHECK;
3508
3509 ev_set_priority (&w->io, ev_priority (w));
3510 ev_io_start (EV_A_ &w->io);
3511
3512 ev_prepare_init (&w->prepare, embed_prepare_cb);
3513 ev_set_priority (&w->prepare, EV_MINPRI);
3514 ev_prepare_start (EV_A_ &w->prepare);
3515
3516 ev_fork_init (&w->fork, embed_fork_cb);
3517 ev_fork_start (EV_A_ &w->fork);
3518
3519 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3520
3521 ev_start (EV_A_ (W)w, 1);
3522
3523 EV_FREQUENT_CHECK;
3524}
3525
3526void
3527ev_embed_stop (EV_P_ ev_embed *w)
3528{
3529 clear_pending (EV_A_ (W)w);
3530 if (expect_false (!ev_is_active (w)))
3531 return;
3532
3533 EV_FREQUENT_CHECK;
3534
3535 ev_io_stop (EV_A_ &w->io);
3536 ev_prepare_stop (EV_A_ &w->prepare);
3537 ev_fork_stop (EV_A_ &w->fork);
3538
3539 ev_stop (EV_A_ (W)w);
3540
3541 EV_FREQUENT_CHECK;
3542}
3543#endif
3544
3545#if EV_FORK_ENABLE
3546void
3547ev_fork_start (EV_P_ ev_fork *w)
3548{
3549 if (expect_false (ev_is_active (w)))
3550 return;
3551
3552 EV_FREQUENT_CHECK;
3553
3554 ev_start (EV_A_ (W)w, ++forkcnt);
3555 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3556 forks [forkcnt - 1] = w;
3557
3558 EV_FREQUENT_CHECK;
3559}
3560
3561void
3562ev_fork_stop (EV_P_ ev_fork *w)
3563{
3564 clear_pending (EV_A_ (W)w);
3565 if (expect_false (!ev_is_active (w)))
3566 return;
3567
3568 EV_FREQUENT_CHECK;
3569
3570 {
3571 int active = ev_active (w);
3572
3573 forks [active - 1] = forks [--forkcnt];
3574 ev_active (forks [active - 1]) = active;
3575 }
3576
3577 ev_stop (EV_A_ (W)w);
3578
3579 EV_FREQUENT_CHECK;
3580}
3581#endif
3582
3583#if EV_ASYNC_ENABLE
3584void
3585ev_async_start (EV_P_ ev_async *w)
3586{
3587 if (expect_false (ev_is_active (w)))
3588 return;
3589
3590 w->sent = 0;
3591
3592 evpipe_init (EV_A);
3593
3594 EV_FREQUENT_CHECK;
3595
3596 ev_start (EV_A_ (W)w, ++asynccnt);
3597 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3598 asyncs [asynccnt - 1] = w;
3599
3600 EV_FREQUENT_CHECK;
3601}
3602
3603void
3604ev_async_stop (EV_P_ ev_async *w)
3605{
3606 clear_pending (EV_A_ (W)w);
3607 if (expect_false (!ev_is_active (w)))
3608 return;
3609
3610 EV_FREQUENT_CHECK;
3611
3612 {
3613 int active = ev_active (w);
3614
3615 asyncs [active - 1] = asyncs [--asynccnt];
3616 ev_active (asyncs [active - 1]) = active;
3617 }
3618
3619 ev_stop (EV_A_ (W)w);
3620
3621 EV_FREQUENT_CHECK;
3622}
3623
3624void
3625ev_async_send (EV_P_ ev_async *w)
3626{
3627 w->sent = 1;
3628 evpipe_write (EV_A_ &async_pending);
3629}
3630#endif
1620 3631
1621/*****************************************************************************/ 3632/*****************************************************************************/
1622 3633
1623struct ev_once 3634struct ev_once
1624{ 3635{
1625 struct ev_io io; 3636 ev_io io;
1626 struct ev_timer to; 3637 ev_timer to;
1627 void (*cb)(int revents, void *arg); 3638 void (*cb)(int revents, void *arg);
1628 void *arg; 3639 void *arg;
1629}; 3640};
1630 3641
1631static void 3642static void
1632once_cb (EV_P_ struct ev_once *once, int revents) 3643once_cb (EV_P_ struct ev_once *once, int revents)
1633{ 3644{
1634 void (*cb)(int revents, void *arg) = once->cb; 3645 void (*cb)(int revents, void *arg) = once->cb;
1635 void *arg = once->arg; 3646 void *arg = once->arg;
1636 3647
1637 ev_io_stop (EV_A_ &once->io); 3648 ev_io_stop (EV_A_ &once->io);
1638 ev_timer_stop (EV_A_ &once->to); 3649 ev_timer_stop (EV_A_ &once->to);
1639 ev_free (once); 3650 ev_free (once);
1640 3651
1641 cb (revents, arg); 3652 cb (revents, arg);
1642} 3653}
1643 3654
1644static void 3655static void
1645once_cb_io (EV_P_ struct ev_io *w, int revents) 3656once_cb_io (EV_P_ ev_io *w, int revents)
1646{ 3657{
1647 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3658 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3659
3660 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1648} 3661}
1649 3662
1650static void 3663static void
1651once_cb_to (EV_P_ struct ev_timer *w, int revents) 3664once_cb_to (EV_P_ ev_timer *w, int revents)
1652{ 3665{
1653 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3666 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3667
3668 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1654} 3669}
1655 3670
1656void 3671void
1657ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3672ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1658{ 3673{
1659 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3674 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1660 3675
1661 if (expect_false (!once)) 3676 if (expect_false (!once))
1662 { 3677 {
1663 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3678 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1664 return; 3679 return;
1665 } 3680 }
1666 3681
1667 once->cb = cb; 3682 once->cb = cb;
1668 once->arg = arg; 3683 once->arg = arg;
… …
1680 ev_timer_set (&once->to, timeout, 0.); 3695 ev_timer_set (&once->to, timeout, 0.);
1681 ev_timer_start (EV_A_ &once->to); 3696 ev_timer_start (EV_A_ &once->to);
1682 } 3697 }
1683} 3698}
1684 3699
1685#ifdef __cplusplus 3700/*****************************************************************************/
1686} 3701
3702#if EV_WALK_ENABLE
3703void
3704ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3705{
3706 int i, j;
3707 ev_watcher_list *wl, *wn;
3708
3709 if (types & (EV_IO | EV_EMBED))
3710 for (i = 0; i < anfdmax; ++i)
3711 for (wl = anfds [i].head; wl; )
3712 {
3713 wn = wl->next;
3714
3715#if EV_EMBED_ENABLE
3716 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3717 {
3718 if (types & EV_EMBED)
3719 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3720 }
3721 else
3722#endif
3723#if EV_USE_INOTIFY
3724 if (ev_cb ((ev_io *)wl) == infy_cb)
3725 ;
3726 else
3727#endif
3728 if ((ev_io *)wl != &pipe_w)
3729 if (types & EV_IO)
3730 cb (EV_A_ EV_IO, wl);
3731
3732 wl = wn;
3733 }
3734
3735 if (types & (EV_TIMER | EV_STAT))
3736 for (i = timercnt + HEAP0; i-- > HEAP0; )
3737#if EV_STAT_ENABLE
3738 /*TODO: timer is not always active*/
3739 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3740 {
3741 if (types & EV_STAT)
3742 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3743 }
3744 else
3745#endif
3746 if (types & EV_TIMER)
3747 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3748
3749#if EV_PERIODIC_ENABLE
3750 if (types & EV_PERIODIC)
3751 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3752 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3753#endif
3754
3755#if EV_IDLE_ENABLE
3756 if (types & EV_IDLE)
3757 for (j = NUMPRI; i--; )
3758 for (i = idlecnt [j]; i--; )
3759 cb (EV_A_ EV_IDLE, idles [j][i]);
3760#endif
3761
3762#if EV_FORK_ENABLE
3763 if (types & EV_FORK)
3764 for (i = forkcnt; i--; )
3765 if (ev_cb (forks [i]) != embed_fork_cb)
3766 cb (EV_A_ EV_FORK, forks [i]);
3767#endif
3768
3769#if EV_ASYNC_ENABLE
3770 if (types & EV_ASYNC)
3771 for (i = asynccnt; i--; )
3772 cb (EV_A_ EV_ASYNC, asyncs [i]);
3773#endif
3774
3775#if EV_PREPARE_ENABLE
3776 if (types & EV_PREPARE)
3777 for (i = preparecnt; i--; )
3778# if EV_EMBED_ENABLE
3779 if (ev_cb (prepares [i]) != embed_prepare_cb)
1687#endif 3780# endif
3781 cb (EV_A_ EV_PREPARE, prepares [i]);
3782#endif
1688 3783
3784#if EV_CHECK_ENABLE
3785 if (types & EV_CHECK)
3786 for (i = checkcnt; i--; )
3787 cb (EV_A_ EV_CHECK, checks [i]);
3788#endif
3789
3790#if EV_SIGNAL_ENABLE
3791 if (types & EV_SIGNAL)
3792 for (i = 0; i < EV_NSIG - 1; ++i)
3793 for (wl = signals [i].head; wl; )
3794 {
3795 wn = wl->next;
3796 cb (EV_A_ EV_SIGNAL, wl);
3797 wl = wn;
3798 }
3799#endif
3800
3801#if EV_CHILD_ENABLE
3802 if (types & EV_CHILD)
3803 for (i = (EV_PID_HASHSIZE); i--; )
3804 for (wl = childs [i]; wl; )
3805 {
3806 wn = wl->next;
3807 cb (EV_A_ EV_CHILD, wl);
3808 wl = wn;
3809 }
3810#endif
3811/* EV_STAT 0x00001000 /* stat data changed */
3812/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3813}
3814#endif
3815
3816#if EV_MULTIPLICITY
3817 #include "ev_wrap.h"
3818#endif
3819
3820EV_CPP(})
3821

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