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Comparing libev/ev.c (file contents):
Revision 1.97 by root, Sun Nov 11 01:53:07 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
68# endif
69# else
70# ifndef EV_USE_MONOTONIC
71# define EV_USE_MONOTONIC 0
72# endif
73# ifndef EV_USE_REALTIME
74# define EV_USE_REALTIME 0
45# endif 75# endif
46# endif 76# endif
47 77
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 78# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 79# ifndef EV_USE_NANOSLEEP
80# define EV_USE_NANOSLEEP EV_FEATURE_OS
81# endif
82# else
83# undef EV_USE_NANOSLEEP
84# define EV_USE_NANOSLEEP 0
50# endif 85# endif
51 86
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 87# if HAVE_SELECT && HAVE_SYS_SELECT_H
88# ifndef EV_USE_SELECT
89# define EV_USE_SELECT EV_FEATURE_BACKENDS
90# endif
91# else
92# undef EV_USE_SELECT
53# define EV_USE_POLL 1 93# define EV_USE_SELECT 0
54# endif 94# endif
55 95
56# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 96# if HAVE_POLL && HAVE_POLL_H
97# ifndef EV_USE_POLL
98# define EV_USE_POLL EV_FEATURE_BACKENDS
99# endif
100# else
101# undef EV_USE_POLL
57# define EV_USE_EPOLL 1 102# define EV_USE_POLL 0
58# endif 103# endif
59 104
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 106# ifndef EV_USE_EPOLL
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif
109# else
110# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0
62# endif 112# endif
113
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# endif
118# else
119# undef EV_USE_KQUEUE
120# define EV_USE_KQUEUE 0
121# endif
122
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# ifndef EV_USE_PORT
125# define EV_USE_PORT EV_FEATURE_BACKENDS
126# endif
127# else
128# undef EV_USE_PORT
129# define EV_USE_PORT 0
130# endif
63 131
132# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
133# ifndef EV_USE_INOTIFY
134# define EV_USE_INOTIFY EV_FEATURE_OS
135# endif
136# else
137# undef EV_USE_INOTIFY
138# define EV_USE_INOTIFY 0
139# endif
140
141# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
142# ifndef EV_USE_SIGNALFD
143# define EV_USE_SIGNALFD EV_FEATURE_OS
144# endif
145# else
146# undef EV_USE_SIGNALFD
147# define EV_USE_SIGNALFD 0
148# endif
149
150# if HAVE_EVENTFD
151# ifndef EV_USE_EVENTFD
152# define EV_USE_EVENTFD EV_FEATURE_OS
153# endif
154# else
155# undef EV_USE_EVENTFD
156# define EV_USE_EVENTFD 0
157# endif
158
64#endif 159#endif
65 160
66#include <math.h> 161#include <math.h>
67#include <stdlib.h> 162#include <stdlib.h>
163#include <string.h>
68#include <fcntl.h> 164#include <fcntl.h>
69#include <stddef.h> 165#include <stddef.h>
70 166
71#include <stdio.h> 167#include <stdio.h>
72 168
73#include <assert.h> 169#include <assert.h>
74#include <errno.h> 170#include <errno.h>
75#include <sys/types.h> 171#include <sys/types.h>
76#include <time.h> 172#include <time.h>
173#include <limits.h>
77 174
78#include <signal.h> 175#include <signal.h>
79
80#ifndef WIN32
81# include <unistd.h>
82# include <sys/time.h>
83# include <sys/wait.h>
84#endif
85/**/
86
87#ifndef EV_USE_MONOTONIC
88# define EV_USE_MONOTONIC 1
89#endif
90
91#ifndef EV_USE_SELECT
92# define EV_USE_SELECT 1
93#endif
94
95#ifndef EV_USE_POLL
96# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
97#endif
98
99#ifndef EV_USE_EPOLL
100# define EV_USE_EPOLL 0
101#endif
102
103#ifndef EV_USE_KQUEUE
104# define EV_USE_KQUEUE 0
105#endif
106
107#ifndef EV_USE_WIN32
108# ifdef WIN32
109# define EV_USE_WIN32 0 /* it does not exist, use select */
110# undef EV_USE_SELECT
111# define EV_USE_SELECT 1
112# else
113# define EV_USE_WIN32 0
114# endif
115#endif
116
117#ifndef EV_USE_REALTIME
118# define EV_USE_REALTIME 1
119#endif
120
121/**/
122
123#ifndef CLOCK_MONOTONIC
124# undef EV_USE_MONOTONIC
125# define EV_USE_MONOTONIC 0
126#endif
127
128#ifndef CLOCK_REALTIME
129# undef EV_USE_REALTIME
130# define EV_USE_REALTIME 0
131#endif
132
133/**/
134
135#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
136#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
137#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
138/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
139 176
140#ifdef EV_H 177#ifdef EV_H
141# include EV_H 178# include EV_H
142#else 179#else
143# include "ev.h" 180# include "ev.h"
144#endif 181#endif
145 182
183EV_CPP(extern "C" {)
184
185#ifndef _WIN32
186# include <sys/time.h>
187# include <sys/wait.h>
188# include <unistd.h>
189#else
190# include <io.h>
191# define WIN32_LEAN_AND_MEAN
192# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1
195# endif
196# undef EV_AVOID_STDIO
197#endif
198
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */
208
209/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG)
211/* use what's provided */
212#elif defined (NSIG)
213# define EV_NSIG (NSIG)
214#elif defined(_NSIG)
215# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX)
217# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX)
219# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX)
221# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG)
223# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG)
225# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE)
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig)
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else
231# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */
234# define EV_NSIG 65
235#endif
236
237#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else
241# define EV_USE_CLOCK_SYSCALL 0
242# endif
243#endif
244
245#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else
249# define EV_USE_MONOTONIC 0
250# endif
251#endif
252
253#ifndef EV_USE_REALTIME
254# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
255#endif
256
257#ifndef EV_USE_NANOSLEEP
258# if _POSIX_C_SOURCE >= 199309L
259# define EV_USE_NANOSLEEP EV_FEATURE_OS
260# else
261# define EV_USE_NANOSLEEP 0
262# endif
263#endif
264
265#ifndef EV_USE_SELECT
266# define EV_USE_SELECT EV_FEATURE_BACKENDS
267#endif
268
269#ifndef EV_USE_POLL
270# ifdef _WIN32
271# define EV_USE_POLL 0
272# else
273# define EV_USE_POLL EV_FEATURE_BACKENDS
274# endif
275#endif
276
277#ifndef EV_USE_EPOLL
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_EPOLL EV_FEATURE_BACKENDS
280# else
281# define EV_USE_EPOLL 0
282# endif
283#endif
284
285#ifndef EV_USE_KQUEUE
286# define EV_USE_KQUEUE 0
287#endif
288
289#ifndef EV_USE_PORT
290# define EV_USE_PORT 0
291#endif
292
293#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS
296# else
297# define EV_USE_INOTIFY 0
298# endif
299#endif
300
301#ifndef EV_PID_HASHSIZE
302# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
303#endif
304
305#ifndef EV_INOTIFY_HASHSIZE
306# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
307#endif
308
309#ifndef EV_USE_EVENTFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_EVENTFD EV_FEATURE_OS
312# else
313# define EV_USE_EVENTFD 0
314# endif
315#endif
316
317#ifndef EV_USE_SIGNALFD
318# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
319# define EV_USE_SIGNALFD EV_FEATURE_OS
320# else
321# define EV_USE_SIGNALFD 0
322# endif
323#endif
324
325#if 0 /* debugging */
326# define EV_VERIFY 3
327# define EV_USE_4HEAP 1
328# define EV_HEAP_CACHE_AT 1
329#endif
330
331#ifndef EV_VERIFY
332# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
333#endif
334
335#ifndef EV_USE_4HEAP
336# define EV_USE_4HEAP EV_FEATURE_DATA
337#endif
338
339#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif
342
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h>
347# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1
351# else
352# undef EV_USE_CLOCK_SYSCALL
353# define EV_USE_CLOCK_SYSCALL 0
354# endif
355#endif
356
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0
368#endif
369
370#ifndef CLOCK_REALTIME
371# undef EV_USE_REALTIME
372# define EV_USE_REALTIME 0
373#endif
374
375#if !EV_STAT_ENABLE
376# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0
378#endif
379
380#if !EV_USE_NANOSLEEP
381# ifndef _WIN32
382# include <sys/select.h>
383# endif
384#endif
385
386#if EV_USE_INOTIFY
387# include <sys/statfs.h>
388# include <sys/inotify.h>
389/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
390# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0
393# endif
394#endif
395
396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif
399
400#if EV_USE_EVENTFD
401/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
402# include <stdint.h>
403# ifndef EFD_NONBLOCK
404# define EFD_NONBLOCK O_NONBLOCK
405# endif
406# ifndef EFD_CLOEXEC
407# ifdef O_CLOEXEC
408# define EFD_CLOEXEC O_CLOEXEC
409# else
410# define EFD_CLOEXEC 02000000
411# endif
412# endif
413EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
414#endif
415
416#if EV_USE_SIGNALFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef SFD_NONBLOCK
420# define SFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef SFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define SFD_CLOEXEC O_CLOEXEC
425# else
426# define SFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
430
431struct signalfd_siginfo
432{
433 uint32_t ssi_signo;
434 char pad[128 - sizeof (uint32_t)];
435};
436#endif
437
438/**/
439
440#if EV_VERIFY >= 3
441# define EV_FREQUENT_CHECK ev_verify (EV_A)
442#else
443# define EV_FREQUENT_CHECK do { } while (0)
444#endif
445
446/*
447 * This is used to avoid floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */
454#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
455
456#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
458
459#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
460#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
461
146#if __GNUC__ >= 3 462#if __GNUC__ >= 4
147# define expect(expr,value) __builtin_expect ((expr),(value)) 463# define expect(expr,value) __builtin_expect ((expr),(value))
148# define inline inline 464# define noinline __attribute__ ((noinline))
149#else 465#else
150# define expect(expr,value) (expr) 466# define expect(expr,value) (expr)
151# define inline static 467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif
152#endif 471#endif
153 472
154#define expect_false(expr) expect ((expr) != 0, 0) 473#define expect_false(expr) expect ((expr) != 0, 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 474#define expect_true(expr) expect ((expr) != 0, 1)
475#define inline_size static inline
156 476
477#if EV_FEATURE_CODE
478# define inline_speed static inline
479#else
480# define inline_speed static noinline
481#endif
482
157#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
484
485#if EV_MINPRI == EV_MAXPRI
486# define ABSPRI(w) (((W)w), 0)
487#else
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif
159 490
491#define EMPTY /* required for microsofts broken pseudo-c compiler */
492#define EMPTY2(a,b) /* used to suppress some warnings */
493
160typedef struct ev_watcher *W; 494typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 495typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 496typedef ev_watcher_time *WT;
163 497
498#define ev_active(w) ((W)(w))->active
499#define ev_at(w) ((WT)(w))->at
500
501#if EV_USE_REALTIME
502/* sig_atomic_t is used to avoid per-thread variables or locking but still */
503/* giving it a reasonably high chance of working on typical architectures */
504static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
505#endif
506
507#if EV_USE_MONOTONIC
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
509#endif
165 510
511#ifndef EV_FD_TO_WIN32_HANDLE
512# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
513#endif
514#ifndef EV_WIN32_HANDLE_TO_FD
515# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
516#endif
517#ifndef EV_WIN32_CLOSE_FD
518# define EV_WIN32_CLOSE_FD(fd) close (fd)
519#endif
520
521#ifdef _WIN32
166#include "ev_win32.c" 522# include "ev_win32.c"
523#endif
167 524
168/*****************************************************************************/ 525/*****************************************************************************/
169 526
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
170static void (*syserr_cb)(const char *msg); 577static void (*syserr_cb)(const char *msg);
171 578
579void
172void ev_set_syserr_cb (void (*cb)(const char *msg)) 580ev_set_syserr_cb (void (*cb)(const char *msg))
173{ 581{
174 syserr_cb = cb; 582 syserr_cb = cb;
175} 583}
176 584
177static void 585static void noinline
178syserr (const char *msg) 586ev_syserr (const char *msg)
179{ 587{
180 if (!msg) 588 if (!msg)
181 msg = "(libev) system error"; 589 msg = "(libev) system error";
182 590
183 if (syserr_cb) 591 if (syserr_cb)
184 syserr_cb (msg); 592 syserr_cb (msg);
185 else 593 else
186 { 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
187 perror (msg); 603 perror (msg);
604#endif
188 abort (); 605 abort ();
189 } 606 }
190} 607}
191 608
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
192static void *(*alloc)(void *ptr, long size); 628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
193 629
630void
194void ev_set_allocator (void *(*cb)(void *ptr, long size)) 631ev_set_allocator (void *(*cb)(void *ptr, long size))
195{ 632{
196 alloc = cb; 633 alloc = cb;
197} 634}
198 635
199static void * 636inline_speed void *
200ev_realloc (void *ptr, long size) 637ev_realloc (void *ptr, long size)
201{ 638{
202 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 639 ptr = alloc (ptr, size);
203 640
204 if (!ptr && size) 641 if (!ptr && size)
205 { 642 {
643#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n");
645#else
206 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
647#endif
207 abort (); 648 abort ();
208 } 649 }
209 650
210 return ptr; 651 return ptr;
211} 652}
… …
213#define ev_malloc(size) ev_realloc (0, (size)) 654#define ev_malloc(size) ev_realloc (0, (size))
214#define ev_free(ptr) ev_realloc ((ptr), 0) 655#define ev_free(ptr) ev_realloc ((ptr), 0)
215 656
216/*****************************************************************************/ 657/*****************************************************************************/
217 658
659/* set in reify when reification needed */
660#define EV_ANFD_REIFY 1
661
662/* file descriptor info structure */
218typedef struct 663typedef struct
219{ 664{
220 WL head; 665 WL head;
221 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 */
222 unsigned char reify; 669 unsigned char unused;
670#if EV_USE_EPOLL
671 unsigned int egen; /* generation counter to counter epoll bugs */
672#endif
673#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
674 SOCKET handle;
675#endif
676#if EV_USE_IOCP
677 OVERLAPPED or, ow;
678#endif
223} ANFD; 679} ANFD;
224 680
681/* stores the pending event set for a given watcher */
225typedef struct 682typedef struct
226{ 683{
227 W w; 684 W w;
228 int events; 685 int events; /* the pending event set for the given watcher */
229} 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
230 715
231#if EV_MULTIPLICITY 716#if EV_MULTIPLICITY
232 717
233 struct ev_loop 718 struct ev_loop
234 { 719 {
235 ev_tstamp ev_rt_now; 720 ev_tstamp ev_rt_now;
721 #define ev_rt_now ((loop)->ev_rt_now)
236 #define VAR(name,decl) decl; 722 #define VAR(name,decl) decl;
237 #include "ev_vars.h" 723 #include "ev_vars.h"
238 #undef VAR 724 #undef VAR
239 }; 725 };
240 #include "ev_wrap.h" 726 #include "ev_wrap.h"
241 727
242 struct ev_loop default_loop_struct; 728 static struct ev_loop default_loop_struct;
243 static struct ev_loop *default_loop; 729 struct ev_loop *ev_default_loop_ptr;
244 730
245#else 731#else
246 732
247 ev_tstamp ev_rt_now; 733 ev_tstamp ev_rt_now;
248 #define VAR(name,decl) static decl; 734 #define VAR(name,decl) static decl;
249 #include "ev_vars.h" 735 #include "ev_vars.h"
250 #undef VAR 736 #undef VAR
251 737
252 static int default_loop; 738 static int ev_default_loop_ptr;
253 739
254#endif 740#endif
741
742#if EV_FEATURE_API
743# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
744# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
745# define EV_INVOKE_PENDING invoke_cb (EV_A)
746#else
747# define EV_RELEASE_CB (void)0
748# define EV_ACQUIRE_CB (void)0
749# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
750#endif
751
752#define EVBREAK_RECURSE 0x80
255 753
256/*****************************************************************************/ 754/*****************************************************************************/
257 755
756#ifndef EV_HAVE_EV_TIME
258ev_tstamp 757ev_tstamp
259ev_time (void) 758ev_time (void)
260{ 759{
261#if EV_USE_REALTIME 760#if EV_USE_REALTIME
761 if (expect_true (have_realtime))
762 {
262 struct timespec ts; 763 struct timespec ts;
263 clock_gettime (CLOCK_REALTIME, &ts); 764 clock_gettime (CLOCK_REALTIME, &ts);
264 return ts.tv_sec + ts.tv_nsec * 1e-9; 765 return ts.tv_sec + ts.tv_nsec * 1e-9;
265#else 766 }
767#endif
768
266 struct timeval tv; 769 struct timeval tv;
267 gettimeofday (&tv, 0); 770 gettimeofday (&tv, 0);
268 return tv.tv_sec + tv.tv_usec * 1e-6; 771 return tv.tv_sec + tv.tv_usec * 1e-6;
269#endif
270} 772}
773#endif
271 774
272inline ev_tstamp 775inline_size ev_tstamp
273get_clock (void) 776get_clock (void)
274{ 777{
275#if EV_USE_MONOTONIC 778#if EV_USE_MONOTONIC
276 if (expect_true (have_monotonic)) 779 if (expect_true (have_monotonic))
277 { 780 {
… …
290{ 793{
291 return ev_rt_now; 794 return ev_rt_now;
292} 795}
293#endif 796#endif
294 797
295#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))
296 858
297#define array_needsize(type,base,cur,cnt,init) \ 859#define array_needsize(type,base,cur,cnt,init) \
298 if (expect_false ((cnt) > cur)) \ 860 if (expect_false ((cnt) > (cur))) \
299 { \ 861 { \
300 int newcnt = cur; \ 862 int ocur_ = (cur); \
301 do \ 863 (base) = (type *)array_realloc \
302 { \ 864 (sizeof (type), (base), &(cur), (cnt)); \
303 newcnt = array_roundsize (type, newcnt << 1); \ 865 init ((base) + (ocur_), (cur) - ocur_); \
304 } \
305 while ((cnt) > newcnt); \
306 \
307 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
308 init (base + cur, newcnt - cur); \
309 cur = newcnt; \
310 } 866 }
311 867
868#if 0
312#define array_slim(type,stem) \ 869#define array_slim(type,stem) \
313 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 870 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
314 { \ 871 { \
315 stem ## max = array_roundsize (stem ## cnt >> 1); \ 872 stem ## max = array_roundsize (stem ## cnt >> 1); \
316 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 873 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
317 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 874 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
318 } 875 }
319 876#endif
320/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
321/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
322#define array_free_microshit(stem) \
323 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
324 877
325#define array_free(stem, idx) \ 878#define array_free(stem, idx) \
326 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
327 880
328/*****************************************************************************/ 881/*****************************************************************************/
329 882
330static void 883/* dummy callback for pending events */
331anfds_init (ANFD *base, int count) 884static void noinline
885pendingcb (EV_P_ ev_prepare *w, int revents)
332{ 886{
333 while (count--)
334 {
335 base->head = 0;
336 base->events = EV_NONE;
337 base->reify = 0;
338
339 ++base;
340 }
341} 887}
342 888
343void 889void noinline
344ev_feed_event (EV_P_ void *w, int revents) 890ev_feed_event (EV_P_ void *w, int revents)
345{ 891{
346 W w_ = (W)w; 892 W w_ = (W)w;
893 int pri = ABSPRI (w_);
347 894
348 if (w_->pending) 895 if (expect_false (w_->pending))
896 pendings [pri][w_->pending - 1].events |= revents;
897 else
349 { 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_;
350 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 902 pendings [pri][w_->pending - 1].events = revents;
351 return;
352 } 903 }
353
354 w_->pending = ++pendingcnt [ABSPRI (w_)];
355 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
356 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
357 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
358} 904}
359 905
360static 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
361queue_events (EV_P_ W *events, int eventcnt, int type) 922queue_events (EV_P_ W *events, int eventcnt, int type)
362{ 923{
363 int i; 924 int i;
364 925
365 for (i = 0; i < eventcnt; ++i) 926 for (i = 0; i < eventcnt; ++i)
366 ev_feed_event (EV_A_ events [i], type); 927 ev_feed_event (EV_A_ events [i], type);
367} 928}
368 929
930/*****************************************************************************/
931
369inline void 932inline_speed void
370fd_event (EV_P_ int fd, int revents) 933fd_event_nocheck (EV_P_ int fd, int revents)
371{ 934{
372 ANFD *anfd = anfds + fd; 935 ANFD *anfd = anfds + fd;
373 struct ev_io *w; 936 ev_io *w;
374 937
375 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)
376 { 939 {
377 int ev = w->events & revents; 940 int ev = w->events & revents;
378 941
379 if (ev) 942 if (ev)
380 ev_feed_event (EV_A_ (W)w, ev); 943 ev_feed_event (EV_A_ (W)w, ev);
381 } 944 }
382} 945}
383 946
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
384void 958void
385ev_feed_fd_event (EV_P_ int fd, int revents) 959ev_feed_fd_event (EV_P_ int fd, int revents)
386{ 960{
961 if (fd >= 0 && fd < anfdmax)
387 fd_event (EV_A_ fd, revents); 962 fd_event_nocheck (EV_A_ fd, revents);
388} 963}
389 964
390/*****************************************************************************/ 965/* make sure the external fd watch events are in-sync */
391 966/* with the kernel/libev internal state */
392static void 967inline_size void
393fd_reify (EV_P) 968fd_reify (EV_P)
394{ 969{
395 int i; 970 int i;
396 971
397 for (i = 0; i < fdchangecnt; ++i) 972 for (i = 0; i < fdchangecnt; ++i)
398 { 973 {
399 int fd = fdchanges [i]; 974 int fd = fdchanges [i];
400 ANFD *anfd = anfds + fd; 975 ANFD *anfd = anfds + fd;
401 struct ev_io *w; 976 ev_io *w;
402 977
403 int events = 0; 978 unsigned char o_events = anfd->events;
979 unsigned char o_reify = anfd->reify;
404 980
405 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
406 events |= w->events;
407
408 anfd->reify = 0; 981 anfd->reify = 0;
409 982
410 method_modify (EV_A_ fd, anfd->events, events); 983#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
984 if (o_reify & EV__IOFDSET)
985 {
986 unsigned long arg;
987 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
988 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989 printf ("oi %d %x\n", fd, anfd->handle);//D
990 }
991#endif
992
993 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
994 {
411 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);
412 } 1006 }
413 1007
414 fdchangecnt = 0; 1008 fdchangecnt = 0;
415} 1009}
416 1010
417static void 1011/* something about the given fd changed */
1012inline_size void
418fd_change (EV_P_ int fd) 1013fd_change (EV_P_ int fd, int flags)
419{ 1014{
420 if (anfds [fd].reify) 1015 unsigned char reify = anfds [fd].reify;
421 return;
422
423 anfds [fd].reify = 1; 1016 anfds [fd].reify |= flags;
424 1017
1018 if (expect_true (!reify))
1019 {
425 ++fdchangecnt; 1020 ++fdchangecnt;
426 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 1021 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
427 fdchanges [fdchangecnt - 1] = fd; 1022 fdchanges [fdchangecnt - 1] = fd;
1023 }
428} 1024}
429 1025
430static void 1026/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027inline_speed void
431fd_kill (EV_P_ int fd) 1028fd_kill (EV_P_ int fd)
432{ 1029{
433 struct ev_io *w; 1030 ev_io *w;
434 1031
435 while ((w = (struct ev_io *)anfds [fd].head)) 1032 while ((w = (ev_io *)anfds [fd].head))
436 { 1033 {
437 ev_io_stop (EV_A_ w); 1034 ev_io_stop (EV_A_ w);
438 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);
439 } 1036 }
440} 1037}
441 1038
442static int 1039/* check whether the given fd is actually valid, for error recovery */
1040inline_size int
443fd_valid (int fd) 1041fd_valid (int fd)
444{ 1042{
445#ifdef WIN32 1043#ifdef _WIN32
446 return !!win32_get_osfhandle (fd); 1044 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
447#else 1045#else
448 return fcntl (fd, F_GETFD) != -1; 1046 return fcntl (fd, F_GETFD) != -1;
449#endif 1047#endif
450} 1048}
451 1049
452/* called on EBADF to verify fds */ 1050/* called on EBADF to verify fds */
453static void 1051static void noinline
454fd_ebadf (EV_P) 1052fd_ebadf (EV_P)
455{ 1053{
456 int fd; 1054 int fd;
457 1055
458 for (fd = 0; fd < anfdmax; ++fd) 1056 for (fd = 0; fd < anfdmax; ++fd)
459 if (anfds [fd].events) 1057 if (anfds [fd].events)
460 if (!fd_valid (fd) == -1 && errno == EBADF) 1058 if (!fd_valid (fd) && errno == EBADF)
461 fd_kill (EV_A_ fd); 1059 fd_kill (EV_A_ fd);
462} 1060}
463 1061
464/* 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 */
465static void 1063static void noinline
466fd_enomem (EV_P) 1064fd_enomem (EV_P)
467{ 1065{
468 int fd; 1066 int fd;
469 1067
470 for (fd = anfdmax; fd--; ) 1068 for (fd = anfdmax; fd--; )
471 if (anfds [fd].events) 1069 if (anfds [fd].events)
472 { 1070 {
473 fd_kill (EV_A_ fd); 1071 fd_kill (EV_A_ fd);
474 return; 1072 break;
475 } 1073 }
476} 1074}
477 1075
478/* 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 */
479static void 1077static void noinline
480fd_rearm_all (EV_P) 1078fd_rearm_all (EV_P)
481{ 1079{
482 int fd; 1080 int fd;
483 1081
484 /* this should be highly optimised to not do anything but set a flag */
485 for (fd = 0; fd < anfdmax; ++fd) 1082 for (fd = 0; fd < anfdmax; ++fd)
486 if (anfds [fd].events) 1083 if (anfds [fd].events)
487 { 1084 {
488 anfds [fd].events = 0; 1085 anfds [fd].events = 0;
489 fd_change (EV_A_ fd); 1086 anfds [fd].emask = 0;
1087 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
490 } 1088 }
491} 1089}
492 1090
1091/* used to prepare libev internal fd's */
1092/* this is not fork-safe */
1093inline_speed void
1094fd_intern (int fd)
1095{
1096#ifdef _WIN32
1097 unsigned long arg = 1;
1098 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1099#else
1100 fcntl (fd, F_SETFD, FD_CLOEXEC);
1101 fcntl (fd, F_SETFL, O_NONBLOCK);
1102#endif
1103}
1104
493/*****************************************************************************/ 1105/*****************************************************************************/
494 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) */
495static void 1331static void
496upheap (WT *heap, int k) 1332pipecb (EV_P_ ev_io *iow, int revents)
497{ 1333{
498 WT w = heap [k]; 1334 int i;
499 1335
500 while (k && heap [k >> 1]->at > w->at) 1336#if EV_USE_EVENTFD
501 { 1337 if (evfd >= 0)
502 heap [k] = heap [k >> 1];
503 ((W)heap [k])->active = k + 1;
504 k >>= 1;
505 } 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 }
506 1349
507 heap [k] = w; 1350 if (sig_pending)
508 ((W)heap [k])->active = k + 1; 1351 {
1352 sig_pending = 0;
509 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
510} 1372}
1373
1374/*****************************************************************************/
511 1375
512static void 1376static void
513downheap (WT *heap, int N, int k)
514{
515 WT w = heap [k];
516
517 while (k < (N >> 1))
518 {
519 int j = k << 1;
520
521 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
522 ++j;
523
524 if (w->at <= heap [j]->at)
525 break;
526
527 heap [k] = heap [j];
528 ((W)heap [k])->active = k + 1;
529 k = j;
530 }
531
532 heap [k] = w;
533 ((W)heap [k])->active = k + 1;
534}
535
536inline void
537adjustheap (WT *heap, int N, int k, ev_tstamp at)
538{
539 ev_tstamp old_at = heap [k]->at;
540 heap [k]->at = at;
541
542 if (old_at < at)
543 downheap (heap, N, k);
544 else
545 upheap (heap, k);
546}
547
548/*****************************************************************************/
549
550typedef struct
551{
552 WL head;
553 sig_atomic_t volatile gotsig;
554} ANSIG;
555
556static ANSIG *signals;
557static int signalmax;
558
559static int sigpipe [2];
560static sig_atomic_t volatile gotsig;
561static struct ev_io sigev;
562
563static void
564signals_init (ANSIG *base, int count)
565{
566 while (count--)
567 {
568 base->head = 0;
569 base->gotsig = 0;
570
571 ++base;
572 }
573}
574
575static void
576sighandler (int signum) 1377ev_sighandler (int signum)
577{ 1378{
578#if WIN32 1379#if EV_MULTIPLICITY
579 signal (signum, sighandler); 1380 EV_P = signals [signum - 1].loop;
580#endif 1381#endif
581 1382
582 signals [signum - 1].gotsig = 1;
583
584 if (!gotsig)
585 {
586 int old_errno = errno;
587 gotsig = 1;
588#ifdef WIN32 1383#ifdef _WIN32
589 send (sigpipe [1], &signum, 1, MSG_DONTWAIT); 1384 signal (signum, ev_sighandler);
590#else
591 write (sigpipe [1], &signum, 1);
592#endif 1385#endif
593 errno = old_errno;
594 }
595}
596 1386
597void 1387 signals [signum - 1].pending = 1;
1388 evpipe_write (EV_A_ &sig_pending);
1389}
1390
1391void noinline
598ev_feed_signal_event (EV_P_ int signum) 1392ev_feed_signal_event (EV_P_ int signum)
599{ 1393{
600 WL w; 1394 WL w;
601 1395
1396 if (expect_false (signum <= 0 || signum > EV_NSIG))
1397 return;
1398
1399 --signum;
1400
602#if EV_MULTIPLICITY 1401#if EV_MULTIPLICITY
603 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1402 /* it is permissible to try to feed a signal to the wrong loop */
604#endif 1403 /* or, likely more useful, feeding a signal nobody is waiting for */
605 1404
606 --signum; 1405 if (expect_false (signals [signum].loop != EV_A))
607
608 if (signum < 0 || signum >= signalmax)
609 return; 1406 return;
1407#endif
610 1408
611 signals [signum].gotsig = 0; 1409 signals [signum].pending = 0;
612 1410
613 for (w = signals [signum].head; w; w = w->next) 1411 for (w = signals [signum].head; w; w = w->next)
614 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1412 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
615} 1413}
616 1414
1415#if EV_USE_SIGNALFD
617static void 1416static void
618sigcb (EV_P_ struct ev_io *iow, int revents) 1417sigfdcb (EV_P_ ev_io *iow, int revents)
619{ 1418{
620 int signum; 1419 struct signalfd_siginfo si[2], *sip; /* these structs are big */
621 1420
622#ifdef WIN32 1421 for (;;)
623 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 1422 {
624#else 1423 ssize_t res = read (sigfd, si, sizeof (si));
625 read (sigpipe [0], &revents, 1);
626#endif
627 gotsig = 0;
628 1424
629 for (signum = signalmax; signum--; ) 1425 /* not ISO-C, as res might be -1, but works with SuS */
630 if (signals [signum].gotsig) 1426 for (sip = si; (char *)sip < (char *)si + res; ++sip)
631 ev_feed_signal_event (EV_A_ signum + 1); 1427 ev_feed_signal_event (EV_A_ sip->ssi_signo);
632}
633 1428
634static void 1429 if (res < (ssize_t)sizeof (si))
635siginit (EV_P) 1430 break;
636{ 1431 }
637#ifndef WIN32
638 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
639 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
640
641 /* rather than sort out wether we really need nb, set it */
642 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
643 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
644#endif
645
646 ev_io_set (&sigev, sigpipe [0], EV_READ);
647 ev_io_start (EV_A_ &sigev);
648 ev_unref (EV_A); /* child watcher should not keep loop alive */
649} 1432}
1433#endif
1434
1435#endif
650 1436
651/*****************************************************************************/ 1437/*****************************************************************************/
652 1438
653static struct ev_child *childs [PID_HASHSIZE]; 1439#if EV_CHILD_ENABLE
1440static WL childs [EV_PID_HASHSIZE];
654 1441
655#ifndef WIN32
656
657static 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}
658 1467
659#ifndef WCONTINUED 1468#ifndef WCONTINUED
660# define WCONTINUED 0 1469# define WCONTINUED 0
661#endif 1470#endif
662 1471
1472/* called on sigchld etc., calls waitpid */
663static void 1473static void
664child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
665{
666 struct ev_child *w;
667
668 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
669 if (w->pid == pid || !w->pid)
670 {
671 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
672 w->rpid = pid;
673 w->rstatus = status;
674 ev_feed_event (EV_A_ (W)w, EV_CHILD);
675 }
676}
677
678static void
679childcb (EV_P_ struct ev_signal *sw, int revents) 1474childcb (EV_P_ ev_signal *sw, int revents)
680{ 1475{
681 int pid, status; 1476 int pid, status;
682 1477
1478 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
683 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1479 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
684 { 1480 if (!WCONTINUED
1481 || errno != EINVAL
1482 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1483 return;
1484
685 /* 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 */
686 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1487 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
687 1488
688 child_reap (EV_A_ sw, pid, pid, status); 1489 child_reap (EV_A_ pid, pid, status);
1490 if ((EV_PID_HASHSIZE) > 1)
689 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 */
690 }
691} 1492}
692 1493
693#endif 1494#endif
694 1495
695/*****************************************************************************/ 1496/*****************************************************************************/
696 1497
1498#if EV_USE_IOCP
1499# include "ev_iocp.c"
1500#endif
1501#if EV_USE_PORT
1502# include "ev_port.c"
1503#endif
697#if EV_USE_KQUEUE 1504#if EV_USE_KQUEUE
698# include "ev_kqueue.c" 1505# include "ev_kqueue.c"
699#endif 1506#endif
700#if EV_USE_EPOLL 1507#if EV_USE_EPOLL
701# include "ev_epoll.c" 1508# include "ev_epoll.c"
… …
718{ 1525{
719 return EV_VERSION_MINOR; 1526 return EV_VERSION_MINOR;
720} 1527}
721 1528
722/* 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 */
723static int 1530int inline_size
724enable_secure (void) 1531enable_secure (void)
725{ 1532{
726#ifdef WIN32 1533#ifdef _WIN32
727 return 0; 1534 return 0;
728#else 1535#else
729 return getuid () != geteuid () 1536 return getuid () != geteuid ()
730 || getgid () != getegid (); 1537 || getgid () != getegid ();
731#endif 1538#endif
732} 1539}
733 1540
734int 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
735ev_method (EV_P) 1603ev_depth (EV_P)
736{ 1604{
737 return method; 1605 return loop_depth;
738} 1606}
739 1607
740static void 1608void
741loop_init (EV_P_ int methods) 1609ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
742{ 1610{
743 if (!method) 1611 io_blocktime = interval;
1612}
1613
1614void
1615ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1616{
1617 timeout_blocktime = interval;
1618}
1619
1620void
1621ev_set_userdata (EV_P_ void *data)
1622{
1623 userdata = data;
1624}
1625
1626void *
1627ev_userdata (EV_P)
1628{
1629 return userdata;
1630}
1631
1632void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1633{
1634 invoke_cb = invoke_pending_cb;
1635}
1636
1637void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1638{
1639 release_cb = release;
1640 acquire_cb = acquire;
1641}
1642#endif
1643
1644/* initialise a loop structure, must be zero-initialised */
1645static void noinline
1646loop_init (EV_P_ unsigned int flags)
1647{
1648 if (!backend)
744 { 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
745#if EV_USE_MONOTONIC 1660#if EV_USE_MONOTONIC
1661 if (!have_monotonic)
1662 {
1663 struct timespec ts;
1664
1665 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1666 have_monotonic = 1;
1667 }
1668#endif
1669
1670 /* pid check not overridable via env */
1671#ifndef _WIN32
1672 if (flags & EVFLAG_FORKCHECK)
1673 curpid = getpid ();
1674#endif
1675
1676 if (!(flags & EVFLAG_NOENV)
1677 && !enable_secure ()
1678 && getenv ("LIBEV_FLAGS"))
1679 flags = atoi (getenv ("LIBEV_FLAGS"));
1680
1681 ev_rt_now = ev_time ();
1682 mn_now = get_clock ();
1683 now_floor = mn_now;
1684 rtmn_diff = ev_rt_now - mn_now;
1685#if EV_FEATURE_API
1686 invoke_cb = ev_invoke_pending;
1687#endif
1688
1689 io_blocktime = 0.;
1690 timeout_blocktime = 0.;
1691 backend = 0;
1692 backend_fd = -1;
1693 sig_pending = 0;
1694#if EV_ASYNC_ENABLE
1695 async_pending = 0;
1696#endif
1697#if EV_USE_INOTIFY
1698 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699#endif
1700#if EV_USE_SIGNALFD
1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702#endif
1703
1704 if (!(flags & 0x0000ffffU))
1705 flags |= ev_recommended_backends ();
1706
1707#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif
1710#if EV_USE_PORT
1711 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1712#endif
1713#if EV_USE_KQUEUE
1714 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1715#endif
1716#if EV_USE_EPOLL
1717 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1718#endif
1719#if EV_USE_POLL
1720 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1721#endif
1722#if EV_USE_SELECT
1723 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1724#endif
1725
1726 ev_prepare_init (&pending_w, pendingcb);
1727
1728#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1729 ev_init (&pipe_w, pipecb);
1730 ev_set_priority (&pipe_w, EV_MAXPRI);
1731#endif
1732 }
1733}
1734
1735/* free up a loop structure */
1736static void noinline
1737loop_destroy (EV_P)
1738{
1739 int i;
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
1774#if EV_USE_PORT
1775 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1776#endif
1777#if EV_USE_KQUEUE
1778 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1779#endif
1780#if EV_USE_EPOLL
1781 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1782#endif
1783#if EV_USE_POLL
1784 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1785#endif
1786#if EV_USE_SELECT
1787 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1788#endif
1789
1790 for (i = NUMPRI; i--; )
1791 {
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;
1799
1800 /* have to use the microsoft-never-gets-it-right macro */
1801 array_free (rfeed, EMPTY);
1802 array_free (fdchange, EMPTY);
1803 array_free (timer, EMPTY);
1804#if EV_PERIODIC_ENABLE
1805 array_free (periodic, EMPTY);
1806#endif
1807#if EV_FORK_ENABLE
1808 array_free (fork, EMPTY);
1809#endif
1810 array_free (prepare, EMPTY);
1811 array_free (check, EMPTY);
1812#if EV_ASYNC_ENABLE
1813 array_free (async, EMPTY);
1814#endif
1815
1816 backend = 0;
1817}
1818
1819#if EV_USE_INOTIFY
1820inline_size void infy_fork (EV_P);
1821#endif
1822
1823inline_size void
1824loop_fork (EV_P)
1825{
1826#if EV_USE_PORT
1827 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1828#endif
1829#if EV_USE_KQUEUE
1830 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1831#endif
1832#if EV_USE_EPOLL
1833 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1834#endif
1835#if EV_USE_INOTIFY
1836 infy_fork (EV_A);
1837#endif
1838
1839 if (ev_is_active (&pipe_w))
1840 {
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
1847
1848 ev_ref (EV_A);
1849 ev_io_stop (EV_A_ &pipe_w);
1850
1851#if EV_USE_EVENTFD
1852 if (evfd >= 0)
1853 close (evfd);
1854#endif
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
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
1867 }
1868
1869 postfork = 0;
1870}
1871
1872#if EV_MULTIPLICITY
1873
1874struct ev_loop *
1875ev_loop_new (unsigned int flags)
1876{
1877 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1878
1879 memset (EV_A, 0, sizeof (struct ev_loop));
1880 loop_init (EV_A_ flags);
1881
1882 if (ev_backend (EV_A))
1883 return EV_A;
1884
1885 return 0;
1886}
1887
1888void
1889ev_loop_destroy (EV_P)
1890{
1891 loop_destroy (EV_A);
1892 ev_free (loop);
1893}
1894
1895void
1896ev_loop_fork (EV_P)
1897{
1898 postfork = 1; /* must be in line with ev_default_fork */
1899}
1900#endif /* multiplicity */
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)
746 { 1955 {
747 struct timespec ts; 1956 verify_watcher (EV_A_ (W)w);
748 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1957 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
749 have_monotonic = 1; 1958 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
750 } 1959 }
751#endif
752 1960
753 ev_rt_now = ev_time (); 1961 assert (timermax >= timercnt);
754 mn_now = get_clock (); 1962 verify_heap (EV_A_ timers, timercnt);
755 now_floor = mn_now;
756 rtmn_diff = ev_rt_now - mn_now;
757 1963
758 if (methods == EVMETHOD_AUTO) 1964#if EV_PERIODIC_ENABLE
759 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1965 assert (periodicmax >= periodiccnt);
760 methods = atoi (getenv ("LIBEV_METHODS")); 1966 verify_heap (EV_A_ periodics, periodiccnt);
761 else
762 methods = EVMETHOD_ANY;
763
764 method = 0;
765#if EV_USE_WIN32
766 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
767#endif
768#if EV_USE_KQUEUE
769 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
770#endif
771#if EV_USE_EPOLL
772 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
773#endif
774#if EV_USE_POLL
775 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
776#endif
777#if EV_USE_SELECT
778 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
779#endif
780
781 ev_init (&sigev, sigcb);
782 ev_set_priority (&sigev, EV_MAXPRI);
783 }
784}
785
786void
787loop_destroy (EV_P)
788{
789 int i;
790
791#if EV_USE_WIN32
792 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
793#endif
794#if EV_USE_KQUEUE
795 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
796#endif
797#if EV_USE_EPOLL
798 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
799#endif
800#if EV_USE_POLL
801 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
802#endif
803#if EV_USE_SELECT
804 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
805#endif 1967#endif
806 1968
807 for (i = NUMPRI; i--; ) 1969 for (i = NUMPRI; i--; )
808 array_free (pending, [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 }
809 1978
810 /* have to use the microsoft-never-gets-it-right macro */ 1979#if EV_FORK_ENABLE
811 array_free_microshit (fdchange); 1980 assert (forkmax >= forkcnt);
812 array_free_microshit (timer); 1981 array_verify (EV_A_ (W *)forks, forkcnt);
813#if EV_PERIODICS 1982#endif
814 array_free_microshit (periodic); 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
815#endif 2004# endif
816 array_free_microshit (idle);
817 array_free_microshit (prepare);
818 array_free_microshit (check);
819
820 method = 0;
821}
822
823static void
824loop_fork (EV_P)
825{
826#if EV_USE_EPOLL
827 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
828#endif 2005#endif
829#if EV_USE_KQUEUE
830 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
831#endif
832
833 if (ev_is_active (&sigev))
834 {
835 /* default loop */
836
837 ev_ref (EV_A);
838 ev_io_stop (EV_A_ &sigev);
839 close (sigpipe [0]);
840 close (sigpipe [1]);
841
842 while (pipe (sigpipe))
843 syserr ("(libev) error creating pipe");
844
845 siginit (EV_A);
846 }
847
848 postfork = 0;
849} 2006}
2007#endif
850 2008
851#if EV_MULTIPLICITY 2009#if EV_MULTIPLICITY
852struct ev_loop * 2010struct ev_loop *
853ev_loop_new (int methods) 2011ev_default_loop_init (unsigned int flags)
854{
855 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
856
857 memset (loop, 0, sizeof (struct ev_loop));
858
859 loop_init (EV_A_ methods);
860
861 if (ev_method (EV_A))
862 return loop;
863
864 return 0;
865}
866
867void
868ev_loop_destroy (EV_P)
869{
870 loop_destroy (EV_A);
871 ev_free (loop);
872}
873
874void
875ev_loop_fork (EV_P)
876{
877 postfork = 1;
878}
879
880#endif
881
882#if EV_MULTIPLICITY
883struct ev_loop *
884#else 2012#else
885int 2013int
2014ev_default_loop (unsigned int flags)
886#endif 2015#endif
887ev_default_loop (int methods)
888{ 2016{
889 if (sigpipe [0] == sigpipe [1])
890 if (pipe (sigpipe))
891 return 0;
892
893 if (!default_loop) 2017 if (!ev_default_loop_ptr)
894 { 2018 {
895#if EV_MULTIPLICITY 2019#if EV_MULTIPLICITY
896 struct ev_loop *loop = default_loop = &default_loop_struct; 2020 EV_P = ev_default_loop_ptr = &default_loop_struct;
897#else 2021#else
898 default_loop = 1; 2022 ev_default_loop_ptr = 1;
899#endif 2023#endif
900 2024
901 loop_init (EV_A_ methods); 2025 loop_init (EV_A_ flags);
902 2026
903 if (ev_method (EV_A)) 2027 if (ev_backend (EV_A))
904 { 2028 {
905 siginit (EV_A); 2029#if EV_CHILD_ENABLE
906
907#ifndef WIN32
908 ev_signal_init (&childev, childcb, SIGCHLD); 2030 ev_signal_init (&childev, childcb, SIGCHLD);
909 ev_set_priority (&childev, EV_MAXPRI); 2031 ev_set_priority (&childev, EV_MAXPRI);
910 ev_signal_start (EV_A_ &childev); 2032 ev_signal_start (EV_A_ &childev);
911 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2033 ev_unref (EV_A); /* child watcher should not keep loop alive */
912#endif 2034#endif
913 } 2035 }
914 else 2036 else
915 default_loop = 0; 2037 ev_default_loop_ptr = 0;
916 } 2038 }
917 2039
918 return default_loop; 2040 return ev_default_loop_ptr;
919} 2041}
920 2042
921void 2043void
922ev_default_destroy (void) 2044ev_default_destroy (void)
923{ 2045{
924#if EV_MULTIPLICITY 2046#if EV_MULTIPLICITY
925 struct ev_loop *loop = default_loop; 2047 EV_P = ev_default_loop_ptr;
926#endif 2048#endif
927 2049
928#ifndef WIN32 2050 ev_default_loop_ptr = 0;
2051
2052#if EV_CHILD_ENABLE
929 ev_ref (EV_A); /* child watcher */ 2053 ev_ref (EV_A); /* child watcher */
930 ev_signal_stop (EV_A_ &childev); 2054 ev_signal_stop (EV_A_ &childev);
931#endif 2055#endif
932 2056
933 ev_ref (EV_A); /* signal watcher */
934 ev_io_stop (EV_A_ &sigev);
935
936 close (sigpipe [0]); sigpipe [0] = 0;
937 close (sigpipe [1]); sigpipe [1] = 0;
938
939 loop_destroy (EV_A); 2057 loop_destroy (EV_A);
940} 2058}
941 2059
942void 2060void
943ev_default_fork (void) 2061ev_default_fork (void)
944{ 2062{
945#if EV_MULTIPLICITY 2063#if EV_MULTIPLICITY
946 struct ev_loop *loop = default_loop; 2064 EV_P = ev_default_loop_ptr;
947#endif 2065#endif
948 2066
949 if (method) 2067 postfork = 1; /* must be in line with ev_loop_fork */
950 postfork = 1;
951} 2068}
952 2069
953/*****************************************************************************/ 2070/*****************************************************************************/
954 2071
955static int 2072void
956any_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)
957{ 2080{
958 int pri; 2081 int pri;
2082 unsigned int count = 0;
959 2083
960 for (pri = NUMPRI; pri--; ) 2084 for (pri = NUMPRI; pri--; )
961 if (pendingcnt [pri]) 2085 count += pendingcnt [pri];
962 return 1;
963 2086
964 return 0; 2087 return count;
965} 2088}
966 2089
967static void 2090void noinline
968call_pending (EV_P) 2091ev_invoke_pending (EV_P)
969{ 2092{
970 int pri; 2093 int pri;
971 2094
972 for (pri = NUMPRI; pri--; ) 2095 for (pri = NUMPRI; pri--; )
973 while (pendingcnt [pri]) 2096 while (pendingcnt [pri])
974 { 2097 {
975 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2098 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
976 2099
977 if (p->w) 2100 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
978 { 2101 /* ^ this is no longer true, as pending_w could be here */
2102
979 p->w->pending = 0; 2103 p->w->pending = 0;
980 EV_CB_INVOKE (p->w, p->events); 2104 EV_CB_INVOKE (p->w, p->events);
981 } 2105 EV_FREQUENT_CHECK;
982 } 2106 }
983} 2107}
984 2108
985static void 2109#if EV_IDLE_ENABLE
2110/* make idle watchers pending. this handles the "call-idle */
2111/* only when higher priorities are idle" logic */
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
986timers_reify (EV_P) 2136timers_reify (EV_P)
987{ 2137{
2138 EV_FREQUENT_CHECK;
2139
988 while (timercnt && ((WT)timers [0])->at <= mn_now) 2140 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
989 { 2141 {
990 struct ev_timer *w = timers [0]; 2142 do
991
992 assert (("inactive timer on timer heap detected", ev_is_active (w)));
993
994 /* first reschedule or stop timer */
995 if (w->repeat)
996 { 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
997 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.));
998 2156
999 ((WT)w)->at += w->repeat; 2157 ANHE_at_cache (timers [HEAP0]);
1000 if (((WT)w)->at < mn_now)
1001 ((WT)w)->at = mn_now;
1002
1003 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);
1004 } 2165 }
1005 else 2166 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1006 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1007 2167
1008 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2168 feed_reverse_done (EV_A_ EV_TIMER);
1009 } 2169 }
1010} 2170}
1011 2171
1012#if EV_PERIODICS 2172#if EV_PERIODIC_ENABLE
1013static void 2173/* make periodics pending */
2174inline_size void
1014periodics_reify (EV_P) 2175periodics_reify (EV_P)
1015{ 2176{
2177 EV_FREQUENT_CHECK;
2178
1016 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2179 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1017 { 2180 {
1018 struct ev_periodic *w = periodics [0]; 2181 int feed_count = 0;
1019 2182
2183 do
2184 {
2185 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2186
1020 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2187 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1021 2188
1022 /* 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
1023 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))
1024 { 2284 {
1025 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2285 ev_rt_now = rtmn_diff + mn_now;
1026 2286 return;
1027 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1028 downheap ((WT *)periodics, periodiccnt, 0);
1029 } 2287 }
1030 else if (w->interval)
1031 {
1032 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1033 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1034 downheap ((WT *)periodics, periodiccnt, 0);
1035 }
1036 else
1037 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1038 2288
1039 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1040 }
1041}
1042
1043static void
1044periodics_reschedule (EV_P)
1045{
1046 int i;
1047
1048 /* adjust periodics after time jump */
1049 for (i = 0; i < periodiccnt; ++i)
1050 {
1051 struct ev_periodic *w = periodics [i];
1052
1053 if (w->reschedule_cb)
1054 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1055 else if (w->interval)
1056 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1057 }
1058
1059 /* now rebuild the heap */
1060 for (i = periodiccnt >> 1; i--; )
1061 downheap ((WT *)periodics, periodiccnt, i);
1062}
1063#endif
1064
1065inline int
1066time_update_monotonic (EV_P)
1067{
1068 mn_now = get_clock ();
1069
1070 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1071 {
1072 ev_rt_now = rtmn_diff + mn_now;
1073 return 0;
1074 }
1075 else
1076 {
1077 now_floor = mn_now; 2289 now_floor = mn_now;
1078 ev_rt_now = ev_time (); 2290 ev_rt_now = ev_time ();
1079 return 1;
1080 }
1081}
1082 2291
1083static void 2292 /* loop a few times, before making important decisions.
1084time_update (EV_P) 2293 * on the choice of "4": one iteration isn't enough,
1085{ 2294 * in case we get preempted during the calls to
1086 int i; 2295 * ev_time and get_clock. a second call is almost guaranteed
1087 2296 * to succeed in that case, though. and looping a few more times
1088#if EV_USE_MONOTONIC 2297 * doesn't hurt either as we only do this on time-jumps or
1089 if (expect_true (have_monotonic)) 2298 * in the unlikely event of having been preempted here.
1090 { 2299 */
1091 if (time_update_monotonic (EV_A)) 2300 for (i = 4; --i; )
1092 { 2301 {
1093 ev_tstamp odiff = rtmn_diff;
1094
1095 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1096 {
1097 rtmn_diff = ev_rt_now - mn_now; 2302 rtmn_diff = ev_rt_now - mn_now;
1098 2303
1099 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2304 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1100 return; /* all is well */ 2305 return; /* all is well */
1101 2306
1102 ev_rt_now = ev_time (); 2307 ev_rt_now = ev_time ();
1103 mn_now = get_clock (); 2308 mn_now = get_clock ();
1104 now_floor = mn_now; 2309 now_floor = mn_now;
1105 } 2310 }
1106 2311
2312 /* no timer adjustment, as the monotonic clock doesn't jump */
2313 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1107# 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
1108 periodics_reschedule (EV_A); 2328 periodics_reschedule (EV_A);
1109# endif 2329#endif
1110 /* no timer adjustment, as the monotonic clock doesn't jump */
1111 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1112 } 2330 }
1113 }
1114 else
1115#endif
1116 {
1117 ev_rt_now = ev_time ();
1118
1119 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1120 {
1121#if EV_PERIODICS
1122 periodics_reschedule (EV_A);
1123#endif
1124
1125 /* adjust timers. this is easy, as the offset is the same for all */
1126 for (i = 0; i < timercnt; ++i)
1127 ((WT)timers [i])->at += ev_rt_now - mn_now;
1128 }
1129 2331
1130 mn_now = ev_rt_now; 2332 mn_now = ev_rt_now;
1131 } 2333 }
1132} 2334}
1133 2335
1134void 2336void
1135ev_ref (EV_P)
1136{
1137 ++activecnt;
1138}
1139
1140void
1141ev_unref (EV_P)
1142{
1143 --activecnt;
1144}
1145
1146static int loop_done;
1147
1148void
1149ev_loop (EV_P_ int flags) 2337ev_run (EV_P_ int flags)
1150{ 2338{
1151 double block; 2339#if EV_FEATURE_API
1152 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2340 ++loop_depth;
2341#endif
2342
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 */
1153 2348
1154 do 2349 do
1155 { 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
1156 /* queue check watchers (and execute them) */ 2375 /* queue prepare watchers (and execute them) */
1157 if (expect_false (preparecnt)) 2376 if (expect_false (preparecnt))
1158 { 2377 {
1159 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2378 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1160 call_pending (EV_A); 2379 EV_INVOKE_PENDING;
1161 } 2380 }
2381#endif
2382
2383 if (expect_false (loop_done))
2384 break;
1162 2385
1163 /* we might have forked, so reify kernel state if necessary */ 2386 /* we might have forked, so reify kernel state if necessary */
1164 if (expect_false (postfork)) 2387 if (expect_false (postfork))
1165 loop_fork (EV_A); 2388 loop_fork (EV_A);
1166 2389
1167 /* update fd-related kernel structures */ 2390 /* update fd-related kernel structures */
1168 fd_reify (EV_A); 2391 fd_reify (EV_A);
1169 2392
1170 /* calculate blocking time */ 2393 /* calculate blocking time */
2394 {
2395 ev_tstamp waittime = 0.;
2396 ev_tstamp sleeptime = 0.;
1171 2397
1172 /* we only need this for !monotonic clock or timers, but as we basically 2398 /* remember old timestamp for io_blocktime calculation */
1173 always have timers, we just calculate it always */ 2399 ev_tstamp prev_mn_now = mn_now;
1174#if EV_USE_MONOTONIC 2400
1175 if (expect_true (have_monotonic)) 2401 /* update time to cancel out callback processing overhead */
1176 time_update_monotonic (EV_A); 2402 time_update (EV_A_ 1e100);
1177 else 2403
1178#endif 2404 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1179 { 2405 {
1180 ev_rt_now = ev_time ();
1181 mn_now = ev_rt_now;
1182 }
1183
1184 if (flags & EVLOOP_NONBLOCK || idlecnt)
1185 block = 0.;
1186 else
1187 {
1188 block = MAX_BLOCKTIME; 2406 waittime = MAX_BLOCKTIME;
1189 2407
1190 if (timercnt) 2408 if (timercnt)
1191 { 2409 {
1192 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2410 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1193 if (block > to) block = to; 2411 if (waittime > to) waittime = to;
1194 } 2412 }
1195 2413
1196#if EV_PERIODICS 2414#if EV_PERIODIC_ENABLE
1197 if (periodiccnt) 2415 if (periodiccnt)
1198 { 2416 {
1199 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;
1200 if (block > to) block = to; 2418 if (waittime > to) waittime = to;
1201 } 2419 }
1202#endif 2420#endif
1203 2421
1204 if (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 }
1205 } 2440 }
1206 2441
1207 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 */
1208 2448
1209 /* update ev_rt_now, do magic */ 2449 /* update ev_rt_now, do magic */
1210 time_update (EV_A); 2450 time_update (EV_A_ waittime + sleeptime);
2451 }
1211 2452
1212 /* queue pending timers and reschedule them */ 2453 /* queue pending timers and reschedule them */
1213 timers_reify (EV_A); /* relative timers called last */ 2454 timers_reify (EV_A); /* relative timers called last */
1214#if EV_PERIODICS 2455#if EV_PERIODIC_ENABLE
1215 periodics_reify (EV_A); /* absolute timers called first */ 2456 periodics_reify (EV_A); /* absolute timers called first */
1216#endif 2457#endif
1217 2458
2459#if EV_IDLE_ENABLE
1218 /* queue idle watchers unless io or timers are pending */ 2460 /* queue idle watchers unless other events are pending */
1219 if (idlecnt && !any_pending (EV_A)) 2461 idle_reify (EV_A);
1220 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2462#endif
1221 2463
2464#if EV_CHECK_ENABLE
1222 /* queue check watchers, to be executed first */ 2465 /* queue check watchers, to be executed first */
1223 if (checkcnt) 2466 if (expect_false (checkcnt))
1224 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2467 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2468#endif
1225 2469
1226 call_pending (EV_A); 2470 EV_INVOKE_PENDING;
1227 } 2471 }
1228 while (activecnt && !loop_done); 2472 while (expect_true (
2473 activecnt
2474 && !loop_done
2475 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2476 ));
1229 2477
1230 if (loop_done != 2) 2478 if (loop_done == EVBREAK_ONE)
1231 loop_done = 0; 2479 loop_done = EVBREAK_CANCEL;
1232}
1233 2480
2481#if EV_FEATURE_API
2482 --loop_depth;
2483#endif
2484}
2485
1234void 2486void
1235ev_unloop (EV_P_ int how) 2487ev_break (EV_P_ int how)
1236{ 2488{
1237 loop_done = how; 2489 loop_done = how;
1238} 2490}
1239 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
1240/*****************************************************************************/ 2529/*****************************************************************************/
2530/* singly-linked list management, used when the expected list length is short */
1241 2531
1242inline void 2532inline_size void
1243wlist_add (WL *head, WL elem) 2533wlist_add (WL *head, WL elem)
1244{ 2534{
1245 elem->next = *head; 2535 elem->next = *head;
1246 *head = elem; 2536 *head = elem;
1247} 2537}
1248 2538
1249inline void 2539inline_size void
1250wlist_del (WL *head, WL elem) 2540wlist_del (WL *head, WL elem)
1251{ 2541{
1252 while (*head) 2542 while (*head)
1253 { 2543 {
1254 if (*head == elem) 2544 if (expect_true (*head == elem))
1255 { 2545 {
1256 *head = elem->next; 2546 *head = elem->next;
1257 return; 2547 break;
1258 } 2548 }
1259 2549
1260 head = &(*head)->next; 2550 head = &(*head)->next;
1261 } 2551 }
1262} 2552}
1263 2553
2554/* internal, faster, version of ev_clear_pending */
1264inline void 2555inline_speed void
1265ev_clear_pending (EV_P_ W w) 2556clear_pending (EV_P_ W w)
1266{ 2557{
1267 if (w->pending) 2558 if (w->pending)
1268 { 2559 {
1269 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2560 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1270 w->pending = 0; 2561 w->pending = 0;
1271 } 2562 }
1272} 2563}
1273 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
1274inline 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
1275ev_start (EV_P_ W w, int active) 2592ev_start (EV_P_ W w, int active)
1276{ 2593{
1277 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2594 pri_adjust (EV_A_ w);
1278 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1279
1280 w->active = active; 2595 w->active = active;
1281 ev_ref (EV_A); 2596 ev_ref (EV_A);
1282} 2597}
1283 2598
1284inline void 2599inline_size void
1285ev_stop (EV_P_ W w) 2600ev_stop (EV_P_ W w)
1286{ 2601{
1287 ev_unref (EV_A); 2602 ev_unref (EV_A);
1288 w->active = 0; 2603 w->active = 0;
1289} 2604}
1290 2605
1291/*****************************************************************************/ 2606/*****************************************************************************/
1292 2607
1293void 2608void noinline
1294ev_io_start (EV_P_ struct ev_io *w) 2609ev_io_start (EV_P_ ev_io *w)
1295{ 2610{
1296 int fd = w->fd; 2611 int fd = w->fd;
1297 2612
2613 if (expect_false (ev_is_active (w)))
2614 return;
2615
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;
2620
2621 ev_start (EV_A_ (W)w, 1);
2622 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2623 wlist_add (&anfds[fd].head, (WL)w);
2624
2625 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2626 w->events &= ~EV__IOFDSET;
2627
2628 EV_FREQUENT_CHECK;
2629}
2630
2631void noinline
2632ev_io_stop (EV_P_ ev_io *w)
2633{
2634 clear_pending (EV_A_ (W)w);
2635 if (expect_false (!ev_is_active (w)))
2636 return;
2637
2638 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2639
2640 EV_FREQUENT_CHECK;
2641
2642 wlist_del (&anfds[w->fd].head, (WL)w);
2643 ev_stop (EV_A_ (W)w);
2644
2645 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2646
2647 EV_FREQUENT_CHECK;
2648}
2649
2650void noinline
2651ev_timer_start (EV_P_ ev_timer *w)
2652{
2653 if (expect_false (ev_is_active (w)))
2654 return;
2655
2656 ev_at (w) += mn_now;
2657
2658 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2659
2660 EV_FREQUENT_CHECK;
2661
2662 ++timercnt;
2663 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2664 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2665 ANHE_w (timers [ev_active (w)]) = (WT)w;
2666 ANHE_at_cache (timers [ev_active (w)]);
2667 upheap (timers, ev_active (w));
2668
2669 EV_FREQUENT_CHECK;
2670
2671 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2672}
2673
2674void noinline
2675ev_timer_stop (EV_P_ ev_timer *w)
2676{
2677 clear_pending (EV_A_ (W)w);
2678 if (expect_false (!ev_is_active (w)))
2679 return;
2680
2681 EV_FREQUENT_CHECK;
2682
2683 {
2684 int active = ev_active (w);
2685
2686 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2687
2688 --timercnt;
2689
2690 if (expect_true (active < timercnt + HEAP0))
2691 {
2692 timers [active] = timers [timercnt + HEAP0];
2693 adjustheap (timers, timercnt, active);
2694 }
2695 }
2696
2697 ev_at (w) -= mn_now;
2698
2699 ev_stop (EV_A_ (W)w);
2700
2701 EV_FREQUENT_CHECK;
2702}
2703
2704void noinline
2705ev_timer_again (EV_P_ ev_timer *w)
2706{
2707 EV_FREQUENT_CHECK;
2708
1298 if (ev_is_active (w)) 2709 if (ev_is_active (w))
1299 return;
1300
1301 assert (("ev_io_start called with negative fd", fd >= 0));
1302
1303 ev_start (EV_A_ (W)w, 1);
1304 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1305 wlist_add ((WL *)&anfds[fd].head, (WL)w);
1306
1307 fd_change (EV_A_ fd);
1308}
1309
1310void
1311ev_io_stop (EV_P_ struct ev_io *w)
1312{
1313 ev_clear_pending (EV_A_ (W)w);
1314 if (!ev_is_active (w))
1315 return;
1316
1317 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1318
1319 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1320 ev_stop (EV_A_ (W)w);
1321
1322 fd_change (EV_A_ w->fd);
1323}
1324
1325void
1326ev_timer_start (EV_P_ struct ev_timer *w)
1327{
1328 if (ev_is_active (w))
1329 return;
1330
1331 ((WT)w)->at += mn_now;
1332
1333 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1334
1335 ev_start (EV_A_ (W)w, ++timercnt);
1336 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1337 timers [timercnt - 1] = w;
1338 upheap ((WT *)timers, timercnt - 1);
1339
1340 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1341}
1342
1343void
1344ev_timer_stop (EV_P_ struct ev_timer *w)
1345{
1346 ev_clear_pending (EV_A_ (W)w);
1347 if (!ev_is_active (w))
1348 return;
1349
1350 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1351
1352 if (((W)w)->active < timercnt--)
1353 {
1354 timers [((W)w)->active - 1] = timers [timercnt];
1355 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1356 }
1357
1358 ((WT)w)->at -= mn_now;
1359
1360 ev_stop (EV_A_ (W)w);
1361}
1362
1363void
1364ev_timer_again (EV_P_ struct ev_timer *w)
1365{
1366 if (ev_is_active (w))
1367 { 2710 {
1368 if (w->repeat) 2711 if (w->repeat)
1369 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat); 2712 {
2713 ev_at (w) = mn_now + w->repeat;
2714 ANHE_at_cache (timers [ev_active (w)]);
2715 adjustheap (timers, timercnt, ev_active (w));
2716 }
1370 else 2717 else
1371 ev_timer_stop (EV_A_ w); 2718 ev_timer_stop (EV_A_ w);
1372 } 2719 }
1373 else if (w->repeat) 2720 else if (w->repeat)
2721 {
2722 ev_at (w) = w->repeat;
1374 ev_timer_start (EV_A_ w); 2723 ev_timer_start (EV_A_ w);
1375} 2724 }
1376 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
1377#if EV_PERIODICS 2735#if EV_PERIODIC_ENABLE
1378void 2736void noinline
1379ev_periodic_start (EV_P_ struct ev_periodic *w) 2737ev_periodic_start (EV_P_ ev_periodic *w)
1380{ 2738{
1381 if (ev_is_active (w)) 2739 if (expect_false (ev_is_active (w)))
1382 return; 2740 return;
1383 2741
1384 if (w->reschedule_cb) 2742 if (w->reschedule_cb)
1385 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2743 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1386 else if (w->interval) 2744 else if (w->interval)
1387 { 2745 {
1388 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.));
1389 /* 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 */
1390 ((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;
1391 } 2749 }
2750 else
2751 ev_at (w) = w->offset;
1392 2752
2753 EV_FREQUENT_CHECK;
2754
2755 ++periodiccnt;
1393 ev_start (EV_A_ (W)w, ++periodiccnt); 2756 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1394 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2757 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1395 periodics [periodiccnt - 1] = w; 2758 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1396 upheap ((WT *)periodics, periodiccnt - 1); 2759 ANHE_at_cache (periodics [ev_active (w)]);
2760 upheap (periodics, ev_active (w));
1397 2761
2762 EV_FREQUENT_CHECK;
2763
1398 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));*/
1399} 2765}
1400 2766
1401void 2767void noinline
1402ev_periodic_stop (EV_P_ struct ev_periodic *w) 2768ev_periodic_stop (EV_P_ ev_periodic *w)
1403{ 2769{
1404 ev_clear_pending (EV_A_ (W)w); 2770 clear_pending (EV_A_ (W)w);
1405 if (!ev_is_active (w)) 2771 if (expect_false (!ev_is_active (w)))
1406 return; 2772 return;
1407 2773
2774 EV_FREQUENT_CHECK;
2775
2776 {
2777 int active = ev_active (w);
2778
1408 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2779 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1409 2780
1410 if (((W)w)->active < periodiccnt--) 2781 --periodiccnt;
2782
2783 if (expect_true (active < periodiccnt + HEAP0))
1411 { 2784 {
1412 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2785 periodics [active] = periodics [periodiccnt + HEAP0];
1413 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2786 adjustheap (periodics, periodiccnt, active);
1414 } 2787 }
2788 }
1415 2789
1416 ev_stop (EV_A_ (W)w); 2790 ev_stop (EV_A_ (W)w);
1417}
1418 2791
1419void 2792 EV_FREQUENT_CHECK;
2793}
2794
2795void noinline
1420ev_periodic_again (EV_P_ struct ev_periodic *w) 2796ev_periodic_again (EV_P_ ev_periodic *w)
1421{ 2797{
1422 /* TODO: use adjustheap and recalculation */ 2798 /* TODO: use adjustheap and recalculation */
1423 ev_periodic_stop (EV_A_ w); 2799 ev_periodic_stop (EV_A_ w);
1424 ev_periodic_start (EV_A_ w); 2800 ev_periodic_start (EV_A_ w);
1425} 2801}
1426#endif 2802#endif
1427 2803
1428void
1429ev_idle_start (EV_P_ struct ev_idle *w)
1430{
1431 if (ev_is_active (w))
1432 return;
1433
1434 ev_start (EV_A_ (W)w, ++idlecnt);
1435 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1436 idles [idlecnt - 1] = w;
1437}
1438
1439void
1440ev_idle_stop (EV_P_ struct ev_idle *w)
1441{
1442 ev_clear_pending (EV_A_ (W)w);
1443 if (ev_is_active (w))
1444 return;
1445
1446 idles [((W)w)->active - 1] = idles [--idlecnt];
1447 ev_stop (EV_A_ (W)w);
1448}
1449
1450void
1451ev_prepare_start (EV_P_ struct ev_prepare *w)
1452{
1453 if (ev_is_active (w))
1454 return;
1455
1456 ev_start (EV_A_ (W)w, ++preparecnt);
1457 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1458 prepares [preparecnt - 1] = w;
1459}
1460
1461void
1462ev_prepare_stop (EV_P_ struct ev_prepare *w)
1463{
1464 ev_clear_pending (EV_A_ (W)w);
1465 if (ev_is_active (w))
1466 return;
1467
1468 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1469 ev_stop (EV_A_ (W)w);
1470}
1471
1472void
1473ev_check_start (EV_P_ struct ev_check *w)
1474{
1475 if (ev_is_active (w))
1476 return;
1477
1478 ev_start (EV_A_ (W)w, ++checkcnt);
1479 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1480 checks [checkcnt - 1] = w;
1481}
1482
1483void
1484ev_check_stop (EV_P_ struct ev_check *w)
1485{
1486 ev_clear_pending (EV_A_ (W)w);
1487 if (!ev_is_active (w))
1488 return;
1489
1490 checks [((W)w)->active - 1] = checks [--checkcnt];
1491 ev_stop (EV_A_ (W)w);
1492}
1493
1494#ifndef SA_RESTART 2804#ifndef SA_RESTART
1495# define SA_RESTART 0 2805# define SA_RESTART 0
1496#endif 2806#endif
1497 2807
1498void 2808#if EV_SIGNAL_ENABLE
2809
2810void noinline
1499ev_signal_start (EV_P_ struct ev_signal *w) 2811ev_signal_start (EV_P_ ev_signal *w)
1500{ 2812{
2813 if (expect_false (ev_is_active (w)))
2814 return;
2815
2816 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2817
1501#if EV_MULTIPLICITY 2818#if EV_MULTIPLICITY
1502 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 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
2857 ev_start (EV_A_ (W)w, 1);
2858 wlist_add (&signals [w->signum - 1].head, (WL)w);
2859
2860 if (!((WL)w)->next)
2861# if EV_USE_SIGNALFD
2862 if (sigfd < 0) /*TODO*/
1503#endif 2863# endif
1504 if (ev_is_active (w)) 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)
2890{
2891 clear_pending (EV_A_ (W)w);
2892 if (expect_false (!ev_is_active (w)))
1505 return; 2893 return;
1506 2894
1507 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2895 EV_FREQUENT_CHECK;
2896
2897 wlist_del (&signals [w->signum - 1].head, (WL)w);
2898 ev_stop (EV_A_ (W)w);
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
2929void
2930ev_child_start (EV_P_ ev_child *w)
2931{
2932#if EV_MULTIPLICITY
2933 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2934#endif
2935 if (expect_false (ev_is_active (w)))
2936 return;
2937
2938 EV_FREQUENT_CHECK;
1508 2939
1509 ev_start (EV_A_ (W)w, 1); 2940 ev_start (EV_A_ (W)w, 1);
1510 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2941 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1511 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1512 2942
1513 if (!((WL)w)->next) 2943 EV_FREQUENT_CHECK;
2944}
2945
2946void
2947ev_child_stop (EV_P_ ev_child *w)
2948{
2949 clear_pending (EV_A_ (W)w);
2950 if (expect_false (!ev_is_active (w)))
2951 return;
2952
2953 EV_FREQUENT_CHECK;
2954
2955 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2956 ev_stop (EV_A_ (W)w);
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 */
1514 { 3006 }
1515#if WIN32 3007 else
1516 signal (w->signum, sighandler); 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)
1517#else 3204#else
1518 struct sigaction sa; 3205# define EV_LSTAT(p,b) lstat (p, b)
1519 sa.sa_handler = sighandler;
1520 sigfillset (&sa.sa_mask);
1521 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1522 sigaction (w->signum, &sa, 0);
1523#endif 3206#endif
1524 }
1525}
1526 3207
1527void 3208void
1528ev_signal_stop (EV_P_ struct ev_signal *w) 3209ev_stat_stat (EV_P_ ev_stat *w)
1529{ 3210{
1530 ev_clear_pending (EV_A_ (W)w); 3211 if (lstat (w->path, &w->attr) < 0)
1531 if (!ev_is_active (w)) 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)
3259{
3260 if (expect_false (ev_is_active (w)))
1532 return; 3261 return;
1533 3262
1534 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 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
3283 ev_start (EV_A_ (W)w, 1);
3284
3285 EV_FREQUENT_CHECK;
3286}
3287
3288void
3289ev_stat_stop (EV_P_ ev_stat *w)
3290{
3291 clear_pending (EV_A_ (W)w);
3292 if (expect_false (!ev_is_active (w)))
3293 return;
3294
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
1535 ev_stop (EV_A_ (W)w); 3307 ev_stop (EV_A_ (W)w);
1536 3308
1537 if (!signals [w->signum - 1].head) 3309 EV_FREQUENT_CHECK;
1538 signal (w->signum, SIG_DFL);
1539} 3310}
3311#endif
1540 3312
3313#if EV_IDLE_ENABLE
1541void 3314void
1542ev_child_start (EV_P_ struct ev_child *w) 3315ev_idle_start (EV_P_ ev_idle *w)
1543{ 3316{
1544#if EV_MULTIPLICITY
1545 assert (("child watchers are only supported in the default loop", loop == default_loop));
1546#endif
1547 if (ev_is_active (w)) 3317 if (expect_false (ev_is_active (w)))
1548 return; 3318 return;
1549 3319
3320 pri_adjust (EV_A_ (W)w);
3321
3322 EV_FREQUENT_CHECK;
3323
3324 {
3325 int active = ++idlecnt [ABSPRI (w)];
3326
3327 ++idleall;
3328 ev_start (EV_A_ (W)w, active);
3329
3330 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3331 idles [ABSPRI (w)][active - 1] = w;
3332 }
3333
3334 EV_FREQUENT_CHECK;
3335}
3336
3337void
3338ev_idle_stop (EV_P_ ev_idle *w)
3339{
3340 clear_pending (EV_A_ (W)w);
3341 if (expect_false (!ev_is_active (w)))
3342 return;
3343
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
3352 ev_stop (EV_A_ (W)w);
3353 --idleall;
3354 }
3355
3356 EV_FREQUENT_CHECK;
3357}
3358#endif
3359
3360#if EV_PREPARE_ENABLE
3361void
3362ev_prepare_start (EV_P_ ev_prepare *w)
3363{
3364 if (expect_false (ev_is_active (w)))
3365 return;
3366
3367 EV_FREQUENT_CHECK;
3368
3369 ev_start (EV_A_ (W)w, ++preparecnt);
3370 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3371 prepares [preparecnt - 1] = w;
3372
3373 EV_FREQUENT_CHECK;
3374}
3375
3376void
3377ev_prepare_stop (EV_P_ ev_prepare *w)
3378{
3379 clear_pending (EV_A_ (W)w);
3380 if (expect_false (!ev_is_active (w)))
3381 return;
3382
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
3392 ev_stop (EV_A_ (W)w);
3393
3394 EV_FREQUENT_CHECK;
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
1550 ev_start (EV_A_ (W)w, 1); 3521 ev_start (EV_A_ (W)w, 1);
1551 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1552}
1553 3522
3523 EV_FREQUENT_CHECK;
3524}
3525
1554void 3526void
1555ev_child_stop (EV_P_ struct ev_child *w) 3527ev_embed_stop (EV_P_ ev_embed *w)
1556{ 3528{
1557 ev_clear_pending (EV_A_ (W)w); 3529 clear_pending (EV_A_ (W)w);
1558 if (!ev_is_active (w)) 3530 if (expect_false (!ev_is_active (w)))
1559 return; 3531 return;
1560 3532
1561 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 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
1562 ev_stop (EV_A_ (W)w); 3539 ev_stop (EV_A_ (W)w);
3540
3541 EV_FREQUENT_CHECK;
1563} 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
1564 3631
1565/*****************************************************************************/ 3632/*****************************************************************************/
1566 3633
1567struct ev_once 3634struct ev_once
1568{ 3635{
1569 struct ev_io io; 3636 ev_io io;
1570 struct ev_timer to; 3637 ev_timer to;
1571 void (*cb)(int revents, void *arg); 3638 void (*cb)(int revents, void *arg);
1572 void *arg; 3639 void *arg;
1573}; 3640};
1574 3641
1575static void 3642static void
1576once_cb (EV_P_ struct ev_once *once, int revents) 3643once_cb (EV_P_ struct ev_once *once, int revents)
1577{ 3644{
1578 void (*cb)(int revents, void *arg) = once->cb; 3645 void (*cb)(int revents, void *arg) = once->cb;
1579 void *arg = once->arg; 3646 void *arg = once->arg;
1580 3647
1581 ev_io_stop (EV_A_ &once->io); 3648 ev_io_stop (EV_A_ &once->io);
1582 ev_timer_stop (EV_A_ &once->to); 3649 ev_timer_stop (EV_A_ &once->to);
1583 ev_free (once); 3650 ev_free (once);
1584 3651
1585 cb (revents, arg); 3652 cb (revents, arg);
1586} 3653}
1587 3654
1588static void 3655static void
1589once_cb_io (EV_P_ struct ev_io *w, int revents) 3656once_cb_io (EV_P_ ev_io *w, int revents)
1590{ 3657{
1591 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));
1592} 3661}
1593 3662
1594static void 3663static void
1595once_cb_to (EV_P_ struct ev_timer *w, int revents) 3664once_cb_to (EV_P_ ev_timer *w, int revents)
1596{ 3665{
1597 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));
1598} 3669}
1599 3670
1600void 3671void
1601ev_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)
1602{ 3673{
1603 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));
1604 3675
1605 if (!once) 3676 if (expect_false (!once))
3677 {
1606 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3678 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1607 else 3679 return;
1608 { 3680 }
3681
1609 once->cb = cb; 3682 once->cb = cb;
1610 once->arg = arg; 3683 once->arg = arg;
1611 3684
1612 ev_init (&once->io, once_cb_io); 3685 ev_init (&once->io, once_cb_io);
1613 if (fd >= 0) 3686 if (fd >= 0)
3687 {
3688 ev_io_set (&once->io, fd, events);
3689 ev_io_start (EV_A_ &once->io);
3690 }
3691
3692 ev_init (&once->to, once_cb_to);
3693 if (timeout >= 0.)
3694 {
3695 ev_timer_set (&once->to, timeout, 0.);
3696 ev_timer_start (EV_A_ &once->to);
3697 }
3698}
3699
3700/*****************************************************************************/
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; )
1614 { 3712 {
1615 ev_io_set (&once->io, fd, events); 3713 wn = wl->next;
1616 ev_io_start (EV_A_ &once->io); 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;
1617 } 3733 }
1618 3734
1619 ev_init (&once->to, once_cb_to); 3735 if (types & (EV_TIMER | EV_STAT))
1620 if (timeout >= 0.) 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)
1621 { 3740 {
1622 ev_timer_set (&once->to, timeout, 0.); 3741 if (types & EV_STAT)
1623 ev_timer_start (EV_A_ &once->to); 3742 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1624 } 3743 }
1625 } 3744 else
1626} 3745#endif
3746 if (types & EV_TIMER)
3747 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1627 3748
1628#ifdef __cplusplus 3749#if EV_PERIODIC_ENABLE
1629} 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)
1630#endif 3780# endif
3781 cb (EV_A_ EV_PREPARE, prepares [i]);
3782#endif
1631 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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