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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 1.354 by root, Fri Oct 22 09:24:11 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/utsname.h>
388# include <sys/statfs.h>
389# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0
394# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif
400
401#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h>
404# ifndef EFD_NONBLOCK
405# define EFD_NONBLOCK O_NONBLOCK
406# endif
407# ifndef EFD_CLOEXEC
408# ifdef O_CLOEXEC
409# define EFD_CLOEXEC O_CLOEXEC
410# else
411# define EFD_CLOEXEC 02000000
412# endif
413# endif
414EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
415#endif
416
417#if EV_USE_SIGNALFD
418/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
419# include <stdint.h>
420# ifndef SFD_NONBLOCK
421# define SFD_NONBLOCK O_NONBLOCK
422# endif
423# ifndef SFD_CLOEXEC
424# ifdef O_CLOEXEC
425# define SFD_CLOEXEC O_CLOEXEC
426# else
427# define SFD_CLOEXEC 02000000
428# endif
429# endif
430EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
431
432struct signalfd_siginfo
433{
434 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)];
436};
437#endif
438
439/**/
440
441#if EV_VERIFY >= 3
442# define EV_FREQUENT_CHECK ev_verify (EV_A)
443#else
444# define EV_FREQUENT_CHECK do { } while (0)
445#endif
446
447/*
448 * This is used to avoid floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
456
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462
146#if __GNUC__ >= 3 463#if __GNUC__ >= 4
147# define expect(expr,value) __builtin_expect ((expr),(value)) 464# define expect(expr,value) __builtin_expect ((expr),(value))
148# define inline inline 465# define noinline __attribute__ ((noinline))
149#else 466#else
150# define expect(expr,value) (expr) 467# define expect(expr,value) (expr)
151# define inline static 468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif
152#endif 472#endif
153 473
154#define expect_false(expr) expect ((expr) != 0, 0) 474#define expect_false(expr) expect ((expr) != 0, 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 475#define expect_true(expr) expect ((expr) != 0, 1)
476#define inline_size static inline
156 477
478#if EV_FEATURE_CODE
479# define inline_speed static inline
480#else
481# define inline_speed static noinline
482#endif
483
157#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485
486#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0)
488#else
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif
159 491
492#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494
160typedef struct ev_watcher *W; 495typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 496typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 497typedef ev_watcher_time *WT;
163 498
499#define ev_active(w) ((W)(w))->active
500#define ev_at(w) ((WT)(w))->at
501
502#if EV_USE_REALTIME
503/* sig_atomic_t is used to avoid per-thread variables or locking but still */
504/* giving it a reasonably high chance of working on typical architectures */
505static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
506#endif
507
508#if EV_USE_MONOTONIC
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 509static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
510#endif
165 511
512#ifndef EV_FD_TO_WIN32_HANDLE
513# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
514#endif
515#ifndef EV_WIN32_HANDLE_TO_FD
516# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
517#endif
518#ifndef EV_WIN32_CLOSE_FD
519# define EV_WIN32_CLOSE_FD(fd) close (fd)
520#endif
521
522#ifdef _WIN32
166#include "ev_win32.c" 523# include "ev_win32.c"
524#endif
167 525
168/*****************************************************************************/ 526/*****************************************************************************/
169 527
528#if EV_AVOID_STDIO
529static void noinline
530ev_printerr (const char *msg)
531{
532 write (STDERR_FILENO, msg, strlen (msg));
533}
534#endif
535
170static void (*syserr_cb)(const char *msg); 536static void (*syserr_cb)(const char *msg);
171 537
538void
172void ev_set_syserr_cb (void (*cb)(const char *msg)) 539ev_set_syserr_cb (void (*cb)(const char *msg))
173{ 540{
174 syserr_cb = cb; 541 syserr_cb = cb;
175} 542}
176 543
177static void 544static void noinline
178syserr (const char *msg) 545ev_syserr (const char *msg)
179{ 546{
180 if (!msg) 547 if (!msg)
181 msg = "(libev) system error"; 548 msg = "(libev) system error";
182 549
183 if (syserr_cb) 550 if (syserr_cb)
184 syserr_cb (msg); 551 syserr_cb (msg);
185 else 552 else
186 { 553 {
554#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg);
558 ev_printerr (": ");
559 ev_printerr (err);
560 ev_printerr ("\n");
561#else
187 perror (msg); 562 perror (msg);
563#endif
188 abort (); 564 abort ();
189 } 565 }
190} 566}
191 567
568static void *
569ev_realloc_emul (void *ptr, long size)
570{
571#if __GLIBC__
572 return realloc (ptr, size);
573#else
574 /* some systems, notably openbsd and darwin, fail to properly
575 * implement realloc (x, 0) (as required by both ansi c-89 and
576 * the single unix specification, so work around them here.
577 */
578
579 if (size)
580 return realloc (ptr, size);
581
582 free (ptr);
583 return 0;
584#endif
585}
586
192static void *(*alloc)(void *ptr, long size); 587static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
193 588
589void
194void ev_set_allocator (void *(*cb)(void *ptr, long size)) 590ev_set_allocator (void *(*cb)(void *ptr, long size))
195{ 591{
196 alloc = cb; 592 alloc = cb;
197} 593}
198 594
199static void * 595inline_speed void *
200ev_realloc (void *ptr, long size) 596ev_realloc (void *ptr, long size)
201{ 597{
202 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 598 ptr = alloc (ptr, size);
203 599
204 if (!ptr && size) 600 if (!ptr && size)
205 { 601 {
602#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n");
604#else
206 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
606#endif
207 abort (); 607 abort ();
208 } 608 }
209 609
210 return ptr; 610 return ptr;
211} 611}
… …
213#define ev_malloc(size) ev_realloc (0, (size)) 613#define ev_malloc(size) ev_realloc (0, (size))
214#define ev_free(ptr) ev_realloc ((ptr), 0) 614#define ev_free(ptr) ev_realloc ((ptr), 0)
215 615
216/*****************************************************************************/ 616/*****************************************************************************/
217 617
618/* set in reify when reification needed */
619#define EV_ANFD_REIFY 1
620
621/* file descriptor info structure */
218typedef struct 622typedef struct
219{ 623{
220 WL head; 624 WL head;
221 unsigned char events; 625 unsigned char events; /* the events watched for */
626 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
627 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
222 unsigned char reify; 628 unsigned char unused;
629#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif
632#if EV_SELECT_IS_WINSOCKET
633 SOCKET handle;
634#endif
223} ANFD; 635} ANFD;
224 636
637/* stores the pending event set for a given watcher */
225typedef struct 638typedef struct
226{ 639{
227 W w; 640 W w;
228 int events; 641 int events; /* the pending event set for the given watcher */
229} ANPENDING; 642} ANPENDING;
643
644#if EV_USE_INOTIFY
645/* hash table entry per inotify-id */
646typedef struct
647{
648 WL head;
649} ANFS;
650#endif
651
652/* Heap Entry */
653#if EV_HEAP_CACHE_AT
654 /* a heap element */
655 typedef struct {
656 ev_tstamp at;
657 WT w;
658 } ANHE;
659
660 #define ANHE_w(he) (he).w /* access watcher, read-write */
661 #define ANHE_at(he) (he).at /* access cached at, read-only */
662 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
663#else
664 /* a heap element */
665 typedef WT ANHE;
666
667 #define ANHE_w(he) (he)
668 #define ANHE_at(he) (he)->at
669 #define ANHE_at_cache(he)
670#endif
230 671
231#if EV_MULTIPLICITY 672#if EV_MULTIPLICITY
232 673
233 struct ev_loop 674 struct ev_loop
234 { 675 {
235 ev_tstamp ev_rt_now; 676 ev_tstamp ev_rt_now;
677 #define ev_rt_now ((loop)->ev_rt_now)
236 #define VAR(name,decl) decl; 678 #define VAR(name,decl) decl;
237 #include "ev_vars.h" 679 #include "ev_vars.h"
238 #undef VAR 680 #undef VAR
239 }; 681 };
240 #include "ev_wrap.h" 682 #include "ev_wrap.h"
241 683
242 struct ev_loop default_loop_struct; 684 static struct ev_loop default_loop_struct;
243 static struct ev_loop *default_loop; 685 struct ev_loop *ev_default_loop_ptr;
244 686
245#else 687#else
246 688
247 ev_tstamp ev_rt_now; 689 ev_tstamp ev_rt_now;
248 #define VAR(name,decl) static decl; 690 #define VAR(name,decl) static decl;
249 #include "ev_vars.h" 691 #include "ev_vars.h"
250 #undef VAR 692 #undef VAR
251 693
252 static int default_loop; 694 static int ev_default_loop_ptr;
253 695
254#endif 696#endif
697
698#if EV_FEATURE_API
699# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
700# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
701# define EV_INVOKE_PENDING invoke_cb (EV_A)
702#else
703# define EV_RELEASE_CB (void)0
704# define EV_ACQUIRE_CB (void)0
705# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
706#endif
707
708#define EVBREAK_RECURSE 0x80
255 709
256/*****************************************************************************/ 710/*****************************************************************************/
257 711
712#ifndef EV_HAVE_EV_TIME
258ev_tstamp 713ev_tstamp
259ev_time (void) 714ev_time (void)
260{ 715{
261#if EV_USE_REALTIME 716#if EV_USE_REALTIME
717 if (expect_true (have_realtime))
718 {
262 struct timespec ts; 719 struct timespec ts;
263 clock_gettime (CLOCK_REALTIME, &ts); 720 clock_gettime (CLOCK_REALTIME, &ts);
264 return ts.tv_sec + ts.tv_nsec * 1e-9; 721 return ts.tv_sec + ts.tv_nsec * 1e-9;
265#else 722 }
723#endif
724
266 struct timeval tv; 725 struct timeval tv;
267 gettimeofday (&tv, 0); 726 gettimeofday (&tv, 0);
268 return tv.tv_sec + tv.tv_usec * 1e-6; 727 return tv.tv_sec + tv.tv_usec * 1e-6;
269#endif
270} 728}
729#endif
271 730
272inline ev_tstamp 731inline_size ev_tstamp
273get_clock (void) 732get_clock (void)
274{ 733{
275#if EV_USE_MONOTONIC 734#if EV_USE_MONOTONIC
276 if (expect_true (have_monotonic)) 735 if (expect_true (have_monotonic))
277 { 736 {
… …
290{ 749{
291 return ev_rt_now; 750 return ev_rt_now;
292} 751}
293#endif 752#endif
294 753
295#define array_roundsize(type,n) ((n) | 4 & ~3) 754void
755ev_sleep (ev_tstamp delay)
756{
757 if (delay > 0.)
758 {
759#if EV_USE_NANOSLEEP
760 struct timespec ts;
761
762 EV_TS_SET (ts, delay);
763 nanosleep (&ts, 0);
764#elif defined(_WIN32)
765 Sleep ((unsigned long)(delay * 1e3));
766#else
767 struct timeval tv;
768
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770 /* something not guaranteed by newer posix versions, but guaranteed */
771 /* by older ones */
772 EV_TV_SET (tv, delay);
773 select (0, 0, 0, 0, &tv);
774#endif
775 }
776}
777
778/*****************************************************************************/
779
780#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
781
782/* find a suitable new size for the given array, */
783/* hopefully by rounding to a nice-to-malloc size */
784inline_size int
785array_nextsize (int elem, int cur, int cnt)
786{
787 int ncur = cur + 1;
788
789 do
790 ncur <<= 1;
791 while (cnt > ncur);
792
793 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
794 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
795 {
796 ncur *= elem;
797 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
798 ncur = ncur - sizeof (void *) * 4;
799 ncur /= elem;
800 }
801
802 return ncur;
803}
804
805static noinline void *
806array_realloc (int elem, void *base, int *cur, int cnt)
807{
808 *cur = array_nextsize (elem, *cur, cnt);
809 return ev_realloc (base, elem * *cur);
810}
811
812#define array_init_zero(base,count) \
813 memset ((void *)(base), 0, sizeof (*(base)) * (count))
296 814
297#define array_needsize(type,base,cur,cnt,init) \ 815#define array_needsize(type,base,cur,cnt,init) \
298 if (expect_false ((cnt) > cur)) \ 816 if (expect_false ((cnt) > (cur))) \
299 { \ 817 { \
300 int newcnt = cur; \ 818 int ocur_ = (cur); \
301 do \ 819 (base) = (type *)array_realloc \
302 { \ 820 (sizeof (type), (base), &(cur), (cnt)); \
303 newcnt = array_roundsize (type, newcnt << 1); \ 821 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 } 822 }
311 823
824#if 0
312#define array_slim(type,stem) \ 825#define array_slim(type,stem) \
313 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 826 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
314 { \ 827 { \
315 stem ## max = array_roundsize (stem ## cnt >> 1); \ 828 stem ## max = array_roundsize (stem ## cnt >> 1); \
316 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 829 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
317 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 830 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
318 } 831 }
319 832#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;
324 833
325#define array_free(stem, idx) \ 834#define array_free(stem, idx) \
326 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 835 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
327 836
328/*****************************************************************************/ 837/*****************************************************************************/
329 838
330static void 839/* dummy callback for pending events */
331anfds_init (ANFD *base, int count) 840static void noinline
841pendingcb (EV_P_ ev_prepare *w, int revents)
332{ 842{
333 while (count--)
334 {
335 base->head = 0;
336 base->events = EV_NONE;
337 base->reify = 0;
338
339 ++base;
340 }
341} 843}
342 844
343void 845void noinline
344ev_feed_event (EV_P_ void *w, int revents) 846ev_feed_event (EV_P_ void *w, int revents)
345{ 847{
346 W w_ = (W)w; 848 W w_ = (W)w;
849 int pri = ABSPRI (w_);
347 850
348 if (w_->pending) 851 if (expect_false (w_->pending))
852 pendings [pri][w_->pending - 1].events |= revents;
853 else
349 { 854 {
855 w_->pending = ++pendingcnt [pri];
856 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
857 pendings [pri][w_->pending - 1].w = w_;
350 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 858 pendings [pri][w_->pending - 1].events = revents;
351 return;
352 } 859 }
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} 860}
359 861
360static void 862inline_speed void
863feed_reverse (EV_P_ W w)
864{
865 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
866 rfeeds [rfeedcnt++] = w;
867}
868
869inline_size void
870feed_reverse_done (EV_P_ int revents)
871{
872 do
873 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
874 while (rfeedcnt);
875}
876
877inline_speed void
361queue_events (EV_P_ W *events, int eventcnt, int type) 878queue_events (EV_P_ W *events, int eventcnt, int type)
362{ 879{
363 int i; 880 int i;
364 881
365 for (i = 0; i < eventcnt; ++i) 882 for (i = 0; i < eventcnt; ++i)
366 ev_feed_event (EV_A_ events [i], type); 883 ev_feed_event (EV_A_ events [i], type);
367} 884}
368 885
886/*****************************************************************************/
887
369inline void 888inline_speed void
370fd_event (EV_P_ int fd, int revents) 889fd_event_nocheck (EV_P_ int fd, int revents)
371{ 890{
372 ANFD *anfd = anfds + fd; 891 ANFD *anfd = anfds + fd;
373 struct ev_io *w; 892 ev_io *w;
374 893
375 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 894 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
376 { 895 {
377 int ev = w->events & revents; 896 int ev = w->events & revents;
378 897
379 if (ev) 898 if (ev)
380 ev_feed_event (EV_A_ (W)w, ev); 899 ev_feed_event (EV_A_ (W)w, ev);
381 } 900 }
382} 901}
383 902
903/* do not submit kernel events for fds that have reify set */
904/* because that means they changed while we were polling for new events */
905inline_speed void
906fd_event (EV_P_ int fd, int revents)
907{
908 ANFD *anfd = anfds + fd;
909
910 if (expect_true (!anfd->reify))
911 fd_event_nocheck (EV_A_ fd, revents);
912}
913
384void 914void
385ev_feed_fd_event (EV_P_ int fd, int revents) 915ev_feed_fd_event (EV_P_ int fd, int revents)
386{ 916{
917 if (fd >= 0 && fd < anfdmax)
387 fd_event (EV_A_ fd, revents); 918 fd_event_nocheck (EV_A_ fd, revents);
388} 919}
389 920
390/*****************************************************************************/ 921/* make sure the external fd watch events are in-sync */
391 922/* with the kernel/libev internal state */
392static void 923inline_size void
393fd_reify (EV_P) 924fd_reify (EV_P)
394{ 925{
395 int i; 926 int i;
396 927
397 for (i = 0; i < fdchangecnt; ++i) 928 for (i = 0; i < fdchangecnt; ++i)
398 { 929 {
399 int fd = fdchanges [i]; 930 int fd = fdchanges [i];
400 ANFD *anfd = anfds + fd; 931 ANFD *anfd = anfds + fd;
401 struct ev_io *w; 932 ev_io *w;
402 933
403 int events = 0; 934 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify;
404 936
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; 937 anfd->reify = 0;
409 938
410 method_modify (EV_A_ fd, anfd->events, events); 939#if EV_SELECT_IS_WINSOCKET
940 if (o_reify & EV__IOFDSET)
941 {
942 unsigned long arg;
943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
945 }
946#endif
947
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 {
411 anfd->events = events; 950 anfd->events = 0;
951
952 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
953 anfd->events |= (unsigned char)w->events;
954
955 if (o_events != anfd->events)
956 o_reify = EV__IOFDSET; /* actually |= */
957 }
958
959 if (o_reify & EV__IOFDSET)
960 backend_modify (EV_A_ fd, o_events, anfd->events);
412 } 961 }
413 962
414 fdchangecnt = 0; 963 fdchangecnt = 0;
415} 964}
416 965
417static void 966/* something about the given fd changed */
967inline_size void
418fd_change (EV_P_ int fd) 968fd_change (EV_P_ int fd, int flags)
419{ 969{
420 if (anfds [fd].reify) 970 unsigned char reify = anfds [fd].reify;
421 return;
422
423 anfds [fd].reify = 1; 971 anfds [fd].reify |= flags;
424 972
973 if (expect_true (!reify))
974 {
425 ++fdchangecnt; 975 ++fdchangecnt;
426 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 976 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
427 fdchanges [fdchangecnt - 1] = fd; 977 fdchanges [fdchangecnt - 1] = fd;
978 }
428} 979}
429 980
430static void 981/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
982inline_speed void
431fd_kill (EV_P_ int fd) 983fd_kill (EV_P_ int fd)
432{ 984{
433 struct ev_io *w; 985 ev_io *w;
434 986
435 while ((w = (struct ev_io *)anfds [fd].head)) 987 while ((w = (ev_io *)anfds [fd].head))
436 { 988 {
437 ev_io_stop (EV_A_ w); 989 ev_io_stop (EV_A_ w);
438 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 990 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
439 } 991 }
440} 992}
441 993
442static int 994/* check whether the given fd is actually valid, for error recovery */
995inline_size int
443fd_valid (int fd) 996fd_valid (int fd)
444{ 997{
445#ifdef WIN32 998#ifdef _WIN32
446 return !!win32_get_osfhandle (fd); 999 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
447#else 1000#else
448 return fcntl (fd, F_GETFD) != -1; 1001 return fcntl (fd, F_GETFD) != -1;
449#endif 1002#endif
450} 1003}
451 1004
452/* called on EBADF to verify fds */ 1005/* called on EBADF to verify fds */
453static void 1006static void noinline
454fd_ebadf (EV_P) 1007fd_ebadf (EV_P)
455{ 1008{
456 int fd; 1009 int fd;
457 1010
458 for (fd = 0; fd < anfdmax; ++fd) 1011 for (fd = 0; fd < anfdmax; ++fd)
459 if (anfds [fd].events) 1012 if (anfds [fd].events)
460 if (!fd_valid (fd) == -1 && errno == EBADF) 1013 if (!fd_valid (fd) && errno == EBADF)
461 fd_kill (EV_A_ fd); 1014 fd_kill (EV_A_ fd);
462} 1015}
463 1016
464/* called on ENOMEM in select/poll to kill some fds and retry */ 1017/* called on ENOMEM in select/poll to kill some fds and retry */
465static void 1018static void noinline
466fd_enomem (EV_P) 1019fd_enomem (EV_P)
467{ 1020{
468 int fd; 1021 int fd;
469 1022
470 for (fd = anfdmax; fd--; ) 1023 for (fd = anfdmax; fd--; )
471 if (anfds [fd].events) 1024 if (anfds [fd].events)
472 { 1025 {
473 fd_kill (EV_A_ fd); 1026 fd_kill (EV_A_ fd);
474 return; 1027 break;
475 } 1028 }
476} 1029}
477 1030
478/* usually called after fork if method needs to re-arm all fds from scratch */ 1031/* usually called after fork if backend needs to re-arm all fds from scratch */
479static void 1032static void noinline
480fd_rearm_all (EV_P) 1033fd_rearm_all (EV_P)
481{ 1034{
482 int fd; 1035 int fd;
483 1036
484 /* this should be highly optimised to not do anything but set a flag */
485 for (fd = 0; fd < anfdmax; ++fd) 1037 for (fd = 0; fd < anfdmax; ++fd)
486 if (anfds [fd].events) 1038 if (anfds [fd].events)
487 { 1039 {
488 anfds [fd].events = 0; 1040 anfds [fd].events = 0;
489 fd_change (EV_A_ fd); 1041 anfds [fd].emask = 0;
1042 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
490 } 1043 }
491} 1044}
492 1045
1046/* used to prepare libev internal fd's */
1047/* this is not fork-safe */
1048inline_speed void
1049fd_intern (int fd)
1050{
1051#ifdef _WIN32
1052 unsigned long arg = 1;
1053 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1054#else
1055 fcntl (fd, F_SETFD, FD_CLOEXEC);
1056 fcntl (fd, F_SETFL, O_NONBLOCK);
1057#endif
1058}
1059
493/*****************************************************************************/ 1060/*****************************************************************************/
494 1061
1062/*
1063 * the heap functions want a real array index. array index 0 is guaranteed to not
1064 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1065 * the branching factor of the d-tree.
1066 */
1067
1068/*
1069 * at the moment we allow libev the luxury of two heaps,
1070 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1071 * which is more cache-efficient.
1072 * the difference is about 5% with 50000+ watchers.
1073 */
1074#if EV_USE_4HEAP
1075
1076#define DHEAP 4
1077#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1078#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1079#define UPHEAP_DONE(p,k) ((p) == (k))
1080
1081/* away from the root */
1082inline_speed void
1083downheap (ANHE *heap, int N, int k)
1084{
1085 ANHE he = heap [k];
1086 ANHE *E = heap + N + HEAP0;
1087
1088 for (;;)
1089 {
1090 ev_tstamp minat;
1091 ANHE *minpos;
1092 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1093
1094 /* find minimum child */
1095 if (expect_true (pos + DHEAP - 1 < E))
1096 {
1097 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1098 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1099 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1100 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1101 }
1102 else if (pos < E)
1103 {
1104 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1105 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1106 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1107 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1108 }
1109 else
1110 break;
1111
1112 if (ANHE_at (he) <= minat)
1113 break;
1114
1115 heap [k] = *minpos;
1116 ev_active (ANHE_w (*minpos)) = k;
1117
1118 k = minpos - heap;
1119 }
1120
1121 heap [k] = he;
1122 ev_active (ANHE_w (he)) = k;
1123}
1124
1125#else /* 4HEAP */
1126
1127#define HEAP0 1
1128#define HPARENT(k) ((k) >> 1)
1129#define UPHEAP_DONE(p,k) (!(p))
1130
1131/* away from the root */
1132inline_speed void
1133downheap (ANHE *heap, int N, int k)
1134{
1135 ANHE he = heap [k];
1136
1137 for (;;)
1138 {
1139 int c = k << 1;
1140
1141 if (c >= N + HEAP0)
1142 break;
1143
1144 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1145 ? 1 : 0;
1146
1147 if (ANHE_at (he) <= ANHE_at (heap [c]))
1148 break;
1149
1150 heap [k] = heap [c];
1151 ev_active (ANHE_w (heap [k])) = k;
1152
1153 k = c;
1154 }
1155
1156 heap [k] = he;
1157 ev_active (ANHE_w (he)) = k;
1158}
1159#endif
1160
1161/* towards the root */
1162inline_speed void
1163upheap (ANHE *heap, int k)
1164{
1165 ANHE he = heap [k];
1166
1167 for (;;)
1168 {
1169 int p = HPARENT (k);
1170
1171 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1172 break;
1173
1174 heap [k] = heap [p];
1175 ev_active (ANHE_w (heap [k])) = k;
1176 k = p;
1177 }
1178
1179 heap [k] = he;
1180 ev_active (ANHE_w (he)) = k;
1181}
1182
1183/* move an element suitably so it is in a correct place */
1184inline_size void
1185adjustheap (ANHE *heap, int N, int k)
1186{
1187 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1188 upheap (heap, k);
1189 else
1190 downheap (heap, N, k);
1191}
1192
1193/* rebuild the heap: this function is used only once and executed rarely */
1194inline_size void
1195reheap (ANHE *heap, int N)
1196{
1197 int i;
1198
1199 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1200 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1201 for (i = 0; i < N; ++i)
1202 upheap (heap, i + HEAP0);
1203}
1204
1205/*****************************************************************************/
1206
1207/* associate signal watchers to a signal signal */
1208typedef struct
1209{
1210 EV_ATOMIC_T pending;
1211#if EV_MULTIPLICITY
1212 EV_P;
1213#endif
1214 WL head;
1215} ANSIG;
1216
1217static ANSIG signals [EV_NSIG - 1];
1218
1219/*****************************************************************************/
1220
1221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1222
1223static void noinline
1224evpipe_init (EV_P)
1225{
1226 if (!ev_is_active (&pipe_w))
1227 {
1228# if EV_USE_EVENTFD
1229 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1230 if (evfd < 0 && errno == EINVAL)
1231 evfd = eventfd (0, 0);
1232
1233 if (evfd >= 0)
1234 {
1235 evpipe [0] = -1;
1236 fd_intern (evfd); /* doing it twice doesn't hurt */
1237 ev_io_set (&pipe_w, evfd, EV_READ);
1238 }
1239 else
1240# endif
1241 {
1242 while (pipe (evpipe))
1243 ev_syserr ("(libev) error creating signal/async pipe");
1244
1245 fd_intern (evpipe [0]);
1246 fd_intern (evpipe [1]);
1247 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1248 }
1249
1250 ev_io_start (EV_A_ &pipe_w);
1251 ev_unref (EV_A); /* watcher should not keep loop alive */
1252 }
1253}
1254
1255inline_size void
1256evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1257{
1258 if (!*flag)
1259 {
1260 int old_errno = errno; /* save errno because write might clobber it */
1261 char dummy;
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 /* win32 people keep sending patches that change this write() to send() */
1274 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1275 /* so when you think this write should be a send instead, please find out */
1276 /* where your send() is from - it's definitely not the microsoft send, and */
1277 /* tell me. thank you. */
1278 write (evpipe [1], &dummy, 1);
1279
1280 errno = old_errno;
1281 }
1282}
1283
1284/* called whenever the libev signal pipe */
1285/* got some events (signal, async) */
495static void 1286static void
496upheap (WT *heap, int k) 1287pipecb (EV_P_ ev_io *iow, int revents)
497{ 1288{
498 WT w = heap [k]; 1289 int i;
499 1290
500 while (k && heap [k >> 1]->at > w->at) 1291#if EV_USE_EVENTFD
501 { 1292 if (evfd >= 0)
502 heap [k] = heap [k >> 1];
503 ((W)heap [k])->active = k + 1;
504 k >>= 1;
505 } 1293 {
1294 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t));
1296 }
1297 else
1298#endif
1299 {
1300 char dummy;
1301 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1302 read (evpipe [0], &dummy, 1);
1303 }
506 1304
507 heap [k] = w; 1305 if (sig_pending)
508 ((W)heap [k])->active = k + 1; 1306 {
1307 sig_pending = 0;
509 1308
1309 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1);
1312 }
1313
1314#if EV_ASYNC_ENABLE
1315 if (async_pending)
1316 {
1317 async_pending = 0;
1318
1319 for (i = asynccnt; i--; )
1320 if (asyncs [i]->sent)
1321 {
1322 asyncs [i]->sent = 0;
1323 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1324 }
1325 }
1326#endif
510} 1327}
1328
1329/*****************************************************************************/
511 1330
512static void 1331static 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) 1332ev_sighandler (int signum)
577{ 1333{
578#if WIN32 1334#if EV_MULTIPLICITY
579 signal (signum, sighandler); 1335 EV_P = signals [signum - 1].loop;
580#endif 1336#endif
581 1337
582 signals [signum - 1].gotsig = 1;
583
584 if (!gotsig)
585 {
586 int old_errno = errno;
587 gotsig = 1;
588#ifdef WIN32 1338#ifdef _WIN32
589 send (sigpipe [1], &signum, 1, MSG_DONTWAIT); 1339 signal (signum, ev_sighandler);
590#else
591 write (sigpipe [1], &signum, 1);
592#endif 1340#endif
593 errno = old_errno;
594 }
595}
596 1341
597void 1342 signals [signum - 1].pending = 1;
1343 evpipe_write (EV_A_ &sig_pending);
1344}
1345
1346void noinline
598ev_feed_signal_event (EV_P_ int signum) 1347ev_feed_signal_event (EV_P_ int signum)
599{ 1348{
600 WL w; 1349 WL w;
601 1350
1351 if (expect_false (signum <= 0 || signum > EV_NSIG))
1352 return;
1353
1354 --signum;
1355
602#if EV_MULTIPLICITY 1356#if EV_MULTIPLICITY
603 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1357 /* it is permissible to try to feed a signal to the wrong loop */
604#endif 1358 /* or, likely more useful, feeding a signal nobody is waiting for */
605 1359
606 --signum; 1360 if (expect_false (signals [signum].loop != EV_A))
607
608 if (signum < 0 || signum >= signalmax)
609 return; 1361 return;
1362#endif
610 1363
611 signals [signum].gotsig = 0; 1364 signals [signum].pending = 0;
612 1365
613 for (w = signals [signum].head; w; w = w->next) 1366 for (w = signals [signum].head; w; w = w->next)
614 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1367 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
615} 1368}
616 1369
1370#if EV_USE_SIGNALFD
617static void 1371static void
618sigcb (EV_P_ struct ev_io *iow, int revents) 1372sigfdcb (EV_P_ ev_io *iow, int revents)
619{ 1373{
620 int signum; 1374 struct signalfd_siginfo si[2], *sip; /* these structs are big */
621 1375
622#ifdef WIN32 1376 for (;;)
623 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 1377 {
624#else 1378 ssize_t res = read (sigfd, si, sizeof (si));
625 read (sigpipe [0], &revents, 1);
626#endif
627 gotsig = 0;
628 1379
629 for (signum = signalmax; signum--; ) 1380 /* not ISO-C, as res might be -1, but works with SuS */
630 if (signals [signum].gotsig) 1381 for (sip = si; (char *)sip < (char *)si + res; ++sip)
631 ev_feed_signal_event (EV_A_ signum + 1); 1382 ev_feed_signal_event (EV_A_ sip->ssi_signo);
632}
633 1383
634static void 1384 if (res < (ssize_t)sizeof (si))
635siginit (EV_P) 1385 break;
636{ 1386 }
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} 1387}
1388#endif
1389
1390#endif
650 1391
651/*****************************************************************************/ 1392/*****************************************************************************/
652 1393
653static struct ev_child *childs [PID_HASHSIZE]; 1394#if EV_CHILD_ENABLE
1395static WL childs [EV_PID_HASHSIZE];
654 1396
655#ifndef WIN32
656
657static struct ev_signal childev; 1397static ev_signal childev;
1398
1399#ifndef WIFCONTINUED
1400# define WIFCONTINUED(status) 0
1401#endif
1402
1403/* handle a single child status event */
1404inline_speed void
1405child_reap (EV_P_ int chain, int pid, int status)
1406{
1407 ev_child *w;
1408 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1409
1410 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1411 {
1412 if ((w->pid == pid || !w->pid)
1413 && (!traced || (w->flags & 1)))
1414 {
1415 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1416 w->rpid = pid;
1417 w->rstatus = status;
1418 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1419 }
1420 }
1421}
658 1422
659#ifndef WCONTINUED 1423#ifndef WCONTINUED
660# define WCONTINUED 0 1424# define WCONTINUED 0
661#endif 1425#endif
662 1426
1427/* called on sigchld etc., calls waitpid */
663static void 1428static 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) 1429childcb (EV_P_ ev_signal *sw, int revents)
680{ 1430{
681 int pid, status; 1431 int pid, status;
682 1432
1433 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
683 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1434 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
684 { 1435 if (!WCONTINUED
1436 || errno != EINVAL
1437 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1438 return;
1439
685 /* make sure we are called again until all childs have been reaped */ 1440 /* make sure we are called again until all children have been reaped */
1441 /* 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); 1442 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
687 1443
688 child_reap (EV_A_ sw, pid, pid, status); 1444 child_reap (EV_A_ pid, pid, status);
1445 if ((EV_PID_HASHSIZE) > 1)
689 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1446 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
690 }
691} 1447}
692 1448
693#endif 1449#endif
694 1450
695/*****************************************************************************/ 1451/*****************************************************************************/
696 1452
1453#if EV_USE_PORT
1454# include "ev_port.c"
1455#endif
697#if EV_USE_KQUEUE 1456#if EV_USE_KQUEUE
698# include "ev_kqueue.c" 1457# include "ev_kqueue.c"
699#endif 1458#endif
700#if EV_USE_EPOLL 1459#if EV_USE_EPOLL
701# include "ev_epoll.c" 1460# include "ev_epoll.c"
… …
718{ 1477{
719 return EV_VERSION_MINOR; 1478 return EV_VERSION_MINOR;
720} 1479}
721 1480
722/* return true if we are running with elevated privileges and should ignore env variables */ 1481/* return true if we are running with elevated privileges and should ignore env variables */
723static int 1482int inline_size
724enable_secure (void) 1483enable_secure (void)
725{ 1484{
726#ifdef WIN32 1485#ifdef _WIN32
727 return 0; 1486 return 0;
728#else 1487#else
729 return getuid () != geteuid () 1488 return getuid () != geteuid ()
730 || getgid () != getegid (); 1489 || getgid () != getegid ();
731#endif 1490#endif
732} 1491}
733 1492
734int 1493unsigned int
1494ev_supported_backends (void)
1495{
1496 unsigned int flags = 0;
1497
1498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1500 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1501 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1503
1504 return flags;
1505}
1506
1507unsigned int
1508ev_recommended_backends (void)
1509{
1510 unsigned int flags = ev_supported_backends ();
1511
1512#ifndef __NetBSD__
1513 /* kqueue is borked on everything but netbsd apparently */
1514 /* it usually doesn't work correctly on anything but sockets and pipes */
1515 flags &= ~EVBACKEND_KQUEUE;
1516#endif
1517#ifdef __APPLE__
1518 /* only select works correctly on that "unix-certified" platform */
1519 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1520 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1521#endif
1522#ifdef __FreeBSD__
1523 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1524#endif
1525
1526 return flags;
1527}
1528
1529unsigned int
1530ev_embeddable_backends (void)
1531{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */
1536 flags &= ~EVBACKEND_EPOLL;
1537
1538 return flags;
1539}
1540
1541unsigned int
1542ev_backend (EV_P)
1543{
1544 return backend;
1545}
1546
1547#if EV_FEATURE_API
1548unsigned int
1549ev_iteration (EV_P)
1550{
1551 return loop_count;
1552}
1553
1554unsigned int
735ev_method (EV_P) 1555ev_depth (EV_P)
736{ 1556{
737 return method; 1557 return loop_depth;
738} 1558}
739 1559
740static void 1560void
741loop_init (EV_P_ int methods) 1561ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
742{ 1562{
743 if (!method) 1563 io_blocktime = interval;
1564}
1565
1566void
1567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1568{
1569 timeout_blocktime = interval;
1570}
1571
1572void
1573ev_set_userdata (EV_P_ void *data)
1574{
1575 userdata = data;
1576}
1577
1578void *
1579ev_userdata (EV_P)
1580{
1581 return userdata;
1582}
1583
1584void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1585{
1586 invoke_cb = invoke_pending_cb;
1587}
1588
1589void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1590{
1591 release_cb = release;
1592 acquire_cb = acquire;
1593}
1594#endif
1595
1596/* initialise a loop structure, must be zero-initialised */
1597static void noinline
1598loop_init (EV_P_ unsigned int flags)
1599{
1600 if (!backend)
744 { 1601 {
1602#if EV_USE_REALTIME
1603 if (!have_realtime)
1604 {
1605 struct timespec ts;
1606
1607 if (!clock_gettime (CLOCK_REALTIME, &ts))
1608 have_realtime = 1;
1609 }
1610#endif
1611
745#if EV_USE_MONOTONIC 1612#if EV_USE_MONOTONIC
1613 if (!have_monotonic)
1614 {
1615 struct timespec ts;
1616
1617 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1618 have_monotonic = 1;
1619 }
1620#endif
1621
1622 /* pid check not overridable via env */
1623#ifndef _WIN32
1624 if (flags & EVFLAG_FORKCHECK)
1625 curpid = getpid ();
1626#endif
1627
1628 if (!(flags & EVFLAG_NOENV)
1629 && !enable_secure ()
1630 && getenv ("LIBEV_FLAGS"))
1631 flags = atoi (getenv ("LIBEV_FLAGS"));
1632
1633 ev_rt_now = ev_time ();
1634 mn_now = get_clock ();
1635 now_floor = mn_now;
1636 rtmn_diff = ev_rt_now - mn_now;
1637#if EV_FEATURE_API
1638 invoke_cb = ev_invoke_pending;
1639#endif
1640
1641 io_blocktime = 0.;
1642 timeout_blocktime = 0.;
1643 backend = 0;
1644 backend_fd = -1;
1645 sig_pending = 0;
1646#if EV_ASYNC_ENABLE
1647 async_pending = 0;
1648#endif
1649#if EV_USE_INOTIFY
1650 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1651#endif
1652#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif
1655
1656 if (!(flags & 0x0000ffffU))
1657 flags |= ev_recommended_backends ();
1658
1659#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif
1662#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1664#endif
1665#if EV_USE_EPOLL
1666 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1667#endif
1668#if EV_USE_POLL
1669 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1670#endif
1671#if EV_USE_SELECT
1672 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1673#endif
1674
1675 ev_prepare_init (&pending_w, pendingcb);
1676
1677#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1678 ev_init (&pipe_w, pipecb);
1679 ev_set_priority (&pipe_w, EV_MAXPRI);
1680#endif
1681 }
1682}
1683
1684/* free up a loop structure */
1685static void noinline
1686loop_destroy (EV_P)
1687{
1688 int i;
1689
1690 if (ev_is_active (&pipe_w))
1691 {
1692 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/
1694
1695#if EV_USE_EVENTFD
1696 if (evfd >= 0)
1697 close (evfd);
1698#endif
1699
1700 if (evpipe [0] >= 0)
1701 {
1702 EV_WIN32_CLOSE_FD (evpipe [0]);
1703 EV_WIN32_CLOSE_FD (evpipe [1]);
1704 }
1705 }
1706
1707#if EV_USE_SIGNALFD
1708 if (ev_is_active (&sigfd_w))
1709 close (sigfd);
1710#endif
1711
1712#if EV_USE_INOTIFY
1713 if (fs_fd >= 0)
1714 close (fs_fd);
1715#endif
1716
1717 if (backend_fd >= 0)
1718 close (backend_fd);
1719
1720#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif
1723#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1725#endif
1726#if EV_USE_EPOLL
1727 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1728#endif
1729#if EV_USE_POLL
1730 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1731#endif
1732#if EV_USE_SELECT
1733 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1734#endif
1735
1736 for (i = NUMPRI; i--; )
1737 {
1738 array_free (pending, [i]);
1739#if EV_IDLE_ENABLE
1740 array_free (idle, [i]);
1741#endif
1742 }
1743
1744 ev_free (anfds); anfds = 0; anfdmax = 0;
1745
1746 /* have to use the microsoft-never-gets-it-right macro */
1747 array_free (rfeed, EMPTY);
1748 array_free (fdchange, EMPTY);
1749 array_free (timer, EMPTY);
1750#if EV_PERIODIC_ENABLE
1751 array_free (periodic, EMPTY);
1752#endif
1753#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY);
1755#endif
1756 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY);
1760#endif
1761
1762 backend = 0;
1763}
1764
1765#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P);
1767#endif
1768
1769inline_size void
1770loop_fork (EV_P)
1771{
1772#if EV_USE_PORT
1773 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1774#endif
1775#if EV_USE_KQUEUE
1776 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1777#endif
1778#if EV_USE_EPOLL
1779 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1780#endif
1781#if EV_USE_INOTIFY
1782 infy_fork (EV_A);
1783#endif
1784
1785 if (ev_is_active (&pipe_w))
1786 {
1787 /* this "locks" the handlers against writing to the pipe */
1788 /* while we modify the fd vars */
1789 sig_pending = 1;
1790#if EV_ASYNC_ENABLE
1791 async_pending = 1;
1792#endif
1793
1794 ev_ref (EV_A);
1795 ev_io_stop (EV_A_ &pipe_w);
1796
1797#if EV_USE_EVENTFD
1798 if (evfd >= 0)
1799 close (evfd);
1800#endif
1801
1802 if (evpipe [0] >= 0)
1803 {
1804 EV_WIN32_CLOSE_FD (evpipe [0]);
1805 EV_WIN32_CLOSE_FD (evpipe [1]);
1806 }
1807
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809 evpipe_init (EV_A);
1810 /* now iterate over everything, in case we missed something */
1811 pipecb (EV_A_ &pipe_w, EV_READ);
1812#endif
1813 }
1814
1815 postfork = 0;
1816}
1817
1818#if EV_MULTIPLICITY
1819
1820struct ev_loop *
1821ev_loop_new (unsigned int flags)
1822{
1823 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1824
1825 memset (EV_A, 0, sizeof (struct ev_loop));
1826 loop_init (EV_A_ flags);
1827
1828 if (ev_backend (EV_A))
1829 return EV_A;
1830
1831 return 0;
1832}
1833
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */
1847
1848#if EV_VERIFY
1849static void noinline
1850verify_watcher (EV_P_ W w)
1851{
1852 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1853
1854 if (w->pending)
1855 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1856}
1857
1858static void noinline
1859verify_heap (EV_P_ ANHE *heap, int N)
1860{
1861 int i;
1862
1863 for (i = HEAP0; i < N + HEAP0; ++i)
1864 {
1865 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1866 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1867 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1868
1869 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1870 }
1871}
1872
1873static void noinline
1874array_verify (EV_P_ W *ws, int cnt)
1875{
1876 while (cnt--)
1877 {
1878 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1879 verify_watcher (EV_A_ ws [cnt]);
1880 }
1881}
1882#endif
1883
1884#if EV_FEATURE_API
1885void
1886ev_verify (EV_P)
1887{
1888#if EV_VERIFY
1889 int i;
1890 WL w;
1891
1892 assert (activecnt >= -1);
1893
1894 assert (fdchangemax >= fdchangecnt);
1895 for (i = 0; i < fdchangecnt; ++i)
1896 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1897
1898 assert (anfdmax >= 0);
1899 for (i = 0; i < anfdmax; ++i)
1900 for (w = anfds [i].head; w; w = w->next)
746 { 1901 {
747 struct timespec ts; 1902 verify_watcher (EV_A_ (W)w);
748 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1903 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
749 have_monotonic = 1; 1904 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
750 } 1905 }
751#endif
752 1906
753 ev_rt_now = ev_time (); 1907 assert (timermax >= timercnt);
754 mn_now = get_clock (); 1908 verify_heap (EV_A_ timers, timercnt);
755 now_floor = mn_now;
756 rtmn_diff = ev_rt_now - mn_now;
757 1909
758 if (methods == EVMETHOD_AUTO) 1910#if EV_PERIODIC_ENABLE
759 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1911 assert (periodicmax >= periodiccnt);
760 methods = atoi (getenv ("LIBEV_METHODS")); 1912 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 1913#endif
806 1914
807 for (i = NUMPRI; i--; ) 1915 for (i = NUMPRI; i--; )
808 array_free (pending, [i]); 1916 {
1917 assert (pendingmax [i] >= pendingcnt [i]);
1918#if EV_IDLE_ENABLE
1919 assert (idleall >= 0);
1920 assert (idlemax [i] >= idlecnt [i]);
1921 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1922#endif
1923 }
809 1924
810 /* have to use the microsoft-never-gets-it-right macro */ 1925#if EV_FORK_ENABLE
811 array_free_microshit (fdchange); 1926 assert (forkmax >= forkcnt);
812 array_free_microshit (timer); 1927 array_verify (EV_A_ (W *)forks, forkcnt);
813#if EV_PERIODICS 1928#endif
814 array_free_microshit (periodic); 1929
1930#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif
1934
1935#if EV_PREPARE_ENABLE
1936 assert (preparemax >= preparecnt);
1937 array_verify (EV_A_ (W *)prepares, preparecnt);
1938#endif
1939
1940#if EV_CHECK_ENABLE
1941 assert (checkmax >= checkcnt);
1942 array_verify (EV_A_ (W *)checks, checkcnt);
1943#endif
1944
1945# if 0
1946#if EV_CHILD_ENABLE
1947 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1948 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1949#endif
815#endif 1950# 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 1951#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} 1952}
1953#endif
850 1954
851#if EV_MULTIPLICITY 1955#if EV_MULTIPLICITY
852struct ev_loop * 1956struct ev_loop *
853ev_loop_new (int methods) 1957ev_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 1958#else
885int 1959int
1960ev_default_loop (unsigned int flags)
886#endif 1961#endif
887ev_default_loop (int methods)
888{ 1962{
889 if (sigpipe [0] == sigpipe [1])
890 if (pipe (sigpipe))
891 return 0;
892
893 if (!default_loop) 1963 if (!ev_default_loop_ptr)
894 { 1964 {
895#if EV_MULTIPLICITY 1965#if EV_MULTIPLICITY
896 struct ev_loop *loop = default_loop = &default_loop_struct; 1966 EV_P = ev_default_loop_ptr = &default_loop_struct;
897#else 1967#else
898 default_loop = 1; 1968 ev_default_loop_ptr = 1;
899#endif 1969#endif
900 1970
901 loop_init (EV_A_ methods); 1971 loop_init (EV_A_ flags);
902 1972
903 if (ev_method (EV_A)) 1973 if (ev_backend (EV_A))
904 { 1974 {
905 siginit (EV_A); 1975#if EV_CHILD_ENABLE
906
907#ifndef WIN32
908 ev_signal_init (&childev, childcb, SIGCHLD); 1976 ev_signal_init (&childev, childcb, SIGCHLD);
909 ev_set_priority (&childev, EV_MAXPRI); 1977 ev_set_priority (&childev, EV_MAXPRI);
910 ev_signal_start (EV_A_ &childev); 1978 ev_signal_start (EV_A_ &childev);
911 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1979 ev_unref (EV_A); /* child watcher should not keep loop alive */
912#endif 1980#endif
913 } 1981 }
914 else 1982 else
915 default_loop = 0; 1983 ev_default_loop_ptr = 0;
916 } 1984 }
917 1985
918 return default_loop; 1986 return ev_default_loop_ptr;
919} 1987}
920 1988
921void 1989void
922ev_default_destroy (void) 1990ev_default_destroy (void)
923{ 1991{
924#if EV_MULTIPLICITY 1992#if EV_MULTIPLICITY
925 struct ev_loop *loop = default_loop; 1993 EV_P = ev_default_loop_ptr;
926#endif 1994#endif
927 1995
928#ifndef WIN32 1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
929 ev_ref (EV_A); /* child watcher */ 1999 ev_ref (EV_A); /* child watcher */
930 ev_signal_stop (EV_A_ &childev); 2000 ev_signal_stop (EV_A_ &childev);
931#endif 2001#endif
932 2002
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); 2003 loop_destroy (EV_A);
940} 2004}
941 2005
942void 2006void
943ev_default_fork (void) 2007ev_default_fork (void)
944{ 2008{
945#if EV_MULTIPLICITY 2009#if EV_MULTIPLICITY
946 struct ev_loop *loop = default_loop; 2010 EV_P = ev_default_loop_ptr;
947#endif 2011#endif
948 2012
949 if (method) 2013 postfork = 1; /* must be in line with ev_loop_fork */
950 postfork = 1;
951} 2014}
952 2015
953/*****************************************************************************/ 2016/*****************************************************************************/
954 2017
955static int 2018void
956any_pending (EV_P) 2019ev_invoke (EV_P_ void *w, int revents)
2020{
2021 EV_CB_INVOKE ((W)w, revents);
2022}
2023
2024unsigned int
2025ev_pending_count (EV_P)
957{ 2026{
958 int pri; 2027 int pri;
2028 unsigned int count = 0;
959 2029
960 for (pri = NUMPRI; pri--; ) 2030 for (pri = NUMPRI; pri--; )
961 if (pendingcnt [pri]) 2031 count += pendingcnt [pri];
962 return 1;
963 2032
964 return 0; 2033 return count;
965} 2034}
966 2035
967static void 2036void noinline
968call_pending (EV_P) 2037ev_invoke_pending (EV_P)
969{ 2038{
970 int pri; 2039 int pri;
971 2040
972 for (pri = NUMPRI; pri--; ) 2041 for (pri = NUMPRI; pri--; )
973 while (pendingcnt [pri]) 2042 while (pendingcnt [pri])
974 { 2043 {
975 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
976 2045
977 if (p->w) 2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
978 { 2047 /* ^ this is no longer true, as pending_w could be here */
2048
979 p->w->pending = 0; 2049 p->w->pending = 0;
980 EV_CB_INVOKE (p->w, p->events); 2050 EV_CB_INVOKE (p->w, p->events);
981 } 2051 EV_FREQUENT_CHECK;
982 } 2052 }
983} 2053}
984 2054
985static void 2055#if EV_IDLE_ENABLE
2056/* make idle watchers pending. this handles the "call-idle */
2057/* only when higher priorities are idle" logic */
2058inline_size void
2059idle_reify (EV_P)
2060{
2061 if (expect_false (idleall))
2062 {
2063 int pri;
2064
2065 for (pri = NUMPRI; pri--; )
2066 {
2067 if (pendingcnt [pri])
2068 break;
2069
2070 if (idlecnt [pri])
2071 {
2072 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2073 break;
2074 }
2075 }
2076 }
2077}
2078#endif
2079
2080/* make timers pending */
2081inline_size void
986timers_reify (EV_P) 2082timers_reify (EV_P)
987{ 2083{
2084 EV_FREQUENT_CHECK;
2085
988 while (timercnt && ((WT)timers [0])->at <= mn_now) 2086 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
989 { 2087 {
990 struct ev_timer *w = timers [0]; 2088 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 { 2089 {
2090 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2091
2092 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2093
2094 /* first reschedule or stop timer */
2095 if (w->repeat)
2096 {
2097 ev_at (w) += w->repeat;
2098 if (ev_at (w) < mn_now)
2099 ev_at (w) = mn_now;
2100
997 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2101 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
998 2102
999 ((WT)w)->at += w->repeat; 2103 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); 2104 downheap (timers, timercnt, HEAP0);
2105 }
2106 else
2107 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2108
2109 EV_FREQUENT_CHECK;
2110 feed_reverse (EV_A_ (W)w);
1004 } 2111 }
1005 else 2112 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1006 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1007 2113
1008 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2114 feed_reverse_done (EV_A_ EV_TIMER);
1009 } 2115 }
1010} 2116}
1011 2117
1012#if EV_PERIODICS 2118#if EV_PERIODIC_ENABLE
1013static void 2119/* make periodics pending */
2120inline_size void
1014periodics_reify (EV_P) 2121periodics_reify (EV_P)
1015{ 2122{
2123 EV_FREQUENT_CHECK;
2124
1016 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2125 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1017 { 2126 {
1018 struct ev_periodic *w = periodics [0]; 2127 int feed_count = 0;
1019 2128
2129 do
2130 {
2131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2132
1020 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1021 2134
1022 /* first reschedule or stop timer */ 2135 /* first reschedule or stop timer */
2136 if (w->reschedule_cb)
2137 {
2138 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2139
2140 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2141
2142 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0);
2144 }
2145 else if (w->interval)
2146 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2148 /* if next trigger time is not sufficiently in the future, put it there */
2149 /* this might happen because of floating point inexactness */
2150 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2151 {
2152 ev_at (w) += w->interval;
2153
2154 /* if interval is unreasonably low we might still have a time in the past */
2155 /* so correct this. this will make the periodic very inexact, but the user */
2156 /* has effectively asked to get triggered more often than possible */
2157 if (ev_at (w) < ev_rt_now)
2158 ev_at (w) = ev_rt_now;
2159 }
2160
2161 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0);
2163 }
2164 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2166
2167 EV_FREQUENT_CHECK;
2168 feed_reverse (EV_A_ (W)w);
2169 }
2170 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2171
2172 feed_reverse_done (EV_A_ EV_PERIODIC);
2173 }
2174}
2175
2176/* simply recalculate all periodics */
2177/* TODO: maybe ensure that at least one event happens when jumping forward? */
2178static void noinline
2179periodics_reschedule (EV_P)
2180{
2181 int i;
2182
2183 /* adjust periodics after time jump */
2184 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2185 {
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187
1023 if (w->reschedule_cb) 2188 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2192
2193 ANHE_at_cache (periodics [i]);
2194 }
2195
2196 reheap (periodics, periodiccnt);
2197}
2198#endif
2199
2200/* adjust all timers by a given offset */
2201static void noinline
2202timers_reschedule (EV_P_ ev_tstamp adjust)
2203{
2204 int i;
2205
2206 for (i = 0; i < timercnt; ++i)
2207 {
2208 ANHE *he = timers + i + HEAP0;
2209 ANHE_w (*he)->at += adjust;
2210 ANHE_at_cache (*he);
2211 }
2212}
2213
2214/* fetch new monotonic and realtime times from the kernel */
2215/* also detect if there was a timejump, and act accordingly */
2216inline_speed void
2217time_update (EV_P_ ev_tstamp max_block)
2218{
2219#if EV_USE_MONOTONIC
2220 if (expect_true (have_monotonic))
2221 {
2222 int i;
2223 ev_tstamp odiff = rtmn_diff;
2224
2225 mn_now = get_clock ();
2226
2227 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2228 /* interpolate in the meantime */
2229 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1024 { 2230 {
1025 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2231 ev_rt_now = rtmn_diff + mn_now;
1026 2232 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 } 2233 }
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 2234
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; 2235 now_floor = mn_now;
1078 ev_rt_now = ev_time (); 2236 ev_rt_now = ev_time ();
1079 return 1;
1080 }
1081}
1082 2237
1083static void 2238 /* loop a few times, before making important decisions.
1084time_update (EV_P) 2239 * on the choice of "4": one iteration isn't enough,
1085{ 2240 * in case we get preempted during the calls to
1086 int i; 2241 * ev_time and get_clock. a second call is almost guaranteed
1087 2242 * to succeed in that case, though. and looping a few more times
1088#if EV_USE_MONOTONIC 2243 * doesn't hurt either as we only do this on time-jumps or
1089 if (expect_true (have_monotonic)) 2244 * in the unlikely event of having been preempted here.
1090 { 2245 */
1091 if (time_update_monotonic (EV_A)) 2246 for (i = 4; --i; )
1092 { 2247 {
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; 2248 rtmn_diff = ev_rt_now - mn_now;
1098 2249
1099 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1100 return; /* all is well */ 2251 return; /* all is well */
1101 2252
1102 ev_rt_now = ev_time (); 2253 ev_rt_now = ev_time ();
1103 mn_now = get_clock (); 2254 mn_now = get_clock ();
1104 now_floor = mn_now; 2255 now_floor = mn_now;
1105 } 2256 }
1106 2257
2258 /* no timer adjustment, as the monotonic clock doesn't jump */
2259 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1107# if EV_PERIODICS 2260# if EV_PERIODIC_ENABLE
2261 periodics_reschedule (EV_A);
2262# endif
2263 }
2264 else
2265#endif
2266 {
2267 ev_rt_now = ev_time ();
2268
2269 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2270 {
2271 /* adjust timers. this is easy, as the offset is the same for all of them */
2272 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2273#if EV_PERIODIC_ENABLE
1108 periodics_reschedule (EV_A); 2274 periodics_reschedule (EV_A);
1109# endif 2275#endif
1110 /* no timer adjustment, as the monotonic clock doesn't jump */
1111 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1112 } 2276 }
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 2277
1130 mn_now = ev_rt_now; 2278 mn_now = ev_rt_now;
1131 } 2279 }
1132} 2280}
1133 2281
1134void 2282void
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) 2283ev_run (EV_P_ int flags)
1150{ 2284{
1151 double block; 2285#if EV_FEATURE_API
1152 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2286 ++loop_depth;
2287#endif
2288
2289 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2290
2291 loop_done = EVBREAK_CANCEL;
2292
2293 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1153 2294
1154 do 2295 do
1155 { 2296 {
2297#if EV_VERIFY >= 2
2298 ev_verify (EV_A);
2299#endif
2300
2301#ifndef _WIN32
2302 if (expect_false (curpid)) /* penalise the forking check even more */
2303 if (expect_false (getpid () != curpid))
2304 {
2305 curpid = getpid ();
2306 postfork = 1;
2307 }
2308#endif
2309
2310#if EV_FORK_ENABLE
2311 /* we might have forked, so queue fork handlers */
2312 if (expect_false (postfork))
2313 if (forkcnt)
2314 {
2315 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2316 EV_INVOKE_PENDING;
2317 }
2318#endif
2319
2320#if EV_PREPARE_ENABLE
1156 /* queue check watchers (and execute them) */ 2321 /* queue prepare watchers (and execute them) */
1157 if (expect_false (preparecnt)) 2322 if (expect_false (preparecnt))
1158 { 2323 {
1159 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2324 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1160 call_pending (EV_A); 2325 EV_INVOKE_PENDING;
1161 } 2326 }
2327#endif
2328
2329 if (expect_false (loop_done))
2330 break;
1162 2331
1163 /* we might have forked, so reify kernel state if necessary */ 2332 /* we might have forked, so reify kernel state if necessary */
1164 if (expect_false (postfork)) 2333 if (expect_false (postfork))
1165 loop_fork (EV_A); 2334 loop_fork (EV_A);
1166 2335
1167 /* update fd-related kernel structures */ 2336 /* update fd-related kernel structures */
1168 fd_reify (EV_A); 2337 fd_reify (EV_A);
1169 2338
1170 /* calculate blocking time */ 2339 /* calculate blocking time */
2340 {
2341 ev_tstamp waittime = 0.;
2342 ev_tstamp sleeptime = 0.;
1171 2343
1172 /* we only need this for !monotonic clock or timers, but as we basically 2344 /* remember old timestamp for io_blocktime calculation */
1173 always have timers, we just calculate it always */ 2345 ev_tstamp prev_mn_now = mn_now;
1174#if EV_USE_MONOTONIC 2346
1175 if (expect_true (have_monotonic)) 2347 /* update time to cancel out callback processing overhead */
1176 time_update_monotonic (EV_A); 2348 time_update (EV_A_ 1e100);
1177 else 2349
1178#endif 2350 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1179 { 2351 {
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; 2352 waittime = MAX_BLOCKTIME;
1189 2353
1190 if (timercnt) 2354 if (timercnt)
1191 { 2355 {
1192 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2356 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1193 if (block > to) block = to; 2357 if (waittime > to) waittime = to;
1194 } 2358 }
1195 2359
1196#if EV_PERIODICS 2360#if EV_PERIODIC_ENABLE
1197 if (periodiccnt) 2361 if (periodiccnt)
1198 { 2362 {
1199 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2363 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1200 if (block > to) block = to; 2364 if (waittime > to) waittime = to;
1201 } 2365 }
1202#endif 2366#endif
1203 2367
1204 if (block < 0.) block = 0.; 2368 /* don't let timeouts decrease the waittime below timeout_blocktime */
2369 if (expect_false (waittime < timeout_blocktime))
2370 waittime = timeout_blocktime;
2371
2372 /* extra check because io_blocktime is commonly 0 */
2373 if (expect_false (io_blocktime))
2374 {
2375 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2376
2377 if (sleeptime > waittime - backend_fudge)
2378 sleeptime = waittime - backend_fudge;
2379
2380 if (expect_true (sleeptime > 0.))
2381 {
2382 ev_sleep (sleeptime);
2383 waittime -= sleeptime;
2384 }
2385 }
1205 } 2386 }
1206 2387
1207 method_poll (EV_A_ block); 2388#if EV_FEATURE_API
2389 ++loop_count;
2390#endif
2391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2392 backend_poll (EV_A_ waittime);
2393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1208 2394
1209 /* update ev_rt_now, do magic */ 2395 /* update ev_rt_now, do magic */
1210 time_update (EV_A); 2396 time_update (EV_A_ waittime + sleeptime);
2397 }
1211 2398
1212 /* queue pending timers and reschedule them */ 2399 /* queue pending timers and reschedule them */
1213 timers_reify (EV_A); /* relative timers called last */ 2400 timers_reify (EV_A); /* relative timers called last */
1214#if EV_PERIODICS 2401#if EV_PERIODIC_ENABLE
1215 periodics_reify (EV_A); /* absolute timers called first */ 2402 periodics_reify (EV_A); /* absolute timers called first */
1216#endif 2403#endif
1217 2404
2405#if EV_IDLE_ENABLE
1218 /* queue idle watchers unless io or timers are pending */ 2406 /* queue idle watchers unless other events are pending */
1219 if (idlecnt && !any_pending (EV_A)) 2407 idle_reify (EV_A);
1220 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2408#endif
1221 2409
2410#if EV_CHECK_ENABLE
1222 /* queue check watchers, to be executed first */ 2411 /* queue check watchers, to be executed first */
1223 if (checkcnt) 2412 if (expect_false (checkcnt))
1224 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2413 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2414#endif
1225 2415
1226 call_pending (EV_A); 2416 EV_INVOKE_PENDING;
1227 } 2417 }
1228 while (activecnt && !loop_done); 2418 while (expect_true (
2419 activecnt
2420 && !loop_done
2421 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2422 ));
1229 2423
1230 if (loop_done != 2) 2424 if (loop_done == EVBREAK_ONE)
1231 loop_done = 0; 2425 loop_done = EVBREAK_CANCEL;
1232}
1233 2426
2427#if EV_FEATURE_API
2428 --loop_depth;
2429#endif
2430}
2431
1234void 2432void
1235ev_unloop (EV_P_ int how) 2433ev_break (EV_P_ int how)
1236{ 2434{
1237 loop_done = how; 2435 loop_done = how;
1238} 2436}
1239 2437
2438void
2439ev_ref (EV_P)
2440{
2441 ++activecnt;
2442}
2443
2444void
2445ev_unref (EV_P)
2446{
2447 --activecnt;
2448}
2449
2450void
2451ev_now_update (EV_P)
2452{
2453 time_update (EV_A_ 1e100);
2454}
2455
2456void
2457ev_suspend (EV_P)
2458{
2459 ev_now_update (EV_A);
2460}
2461
2462void
2463ev_resume (EV_P)
2464{
2465 ev_tstamp mn_prev = mn_now;
2466
2467 ev_now_update (EV_A);
2468 timers_reschedule (EV_A_ mn_now - mn_prev);
2469#if EV_PERIODIC_ENABLE
2470 /* TODO: really do this? */
2471 periodics_reschedule (EV_A);
2472#endif
2473}
2474
1240/*****************************************************************************/ 2475/*****************************************************************************/
2476/* singly-linked list management, used when the expected list length is short */
1241 2477
1242inline void 2478inline_size void
1243wlist_add (WL *head, WL elem) 2479wlist_add (WL *head, WL elem)
1244{ 2480{
1245 elem->next = *head; 2481 elem->next = *head;
1246 *head = elem; 2482 *head = elem;
1247} 2483}
1248 2484
1249inline void 2485inline_size void
1250wlist_del (WL *head, WL elem) 2486wlist_del (WL *head, WL elem)
1251{ 2487{
1252 while (*head) 2488 while (*head)
1253 { 2489 {
1254 if (*head == elem) 2490 if (expect_true (*head == elem))
1255 { 2491 {
1256 *head = elem->next; 2492 *head = elem->next;
1257 return; 2493 break;
1258 } 2494 }
1259 2495
1260 head = &(*head)->next; 2496 head = &(*head)->next;
1261 } 2497 }
1262} 2498}
1263 2499
2500/* internal, faster, version of ev_clear_pending */
1264inline void 2501inline_speed void
1265ev_clear_pending (EV_P_ W w) 2502clear_pending (EV_P_ W w)
1266{ 2503{
1267 if (w->pending) 2504 if (w->pending)
1268 { 2505 {
1269 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2506 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1270 w->pending = 0; 2507 w->pending = 0;
1271 } 2508 }
1272} 2509}
1273 2510
2511int
2512ev_clear_pending (EV_P_ void *w)
2513{
2514 W w_ = (W)w;
2515 int pending = w_->pending;
2516
2517 if (expect_true (pending))
2518 {
2519 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2520 p->w = (W)&pending_w;
2521 w_->pending = 0;
2522 return p->events;
2523 }
2524 else
2525 return 0;
2526}
2527
1274inline void 2528inline_size void
2529pri_adjust (EV_P_ W w)
2530{
2531 int pri = ev_priority (w);
2532 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2533 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2534 ev_set_priority (w, pri);
2535}
2536
2537inline_speed void
1275ev_start (EV_P_ W w, int active) 2538ev_start (EV_P_ W w, int active)
1276{ 2539{
1277 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2540 pri_adjust (EV_A_ w);
1278 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1279
1280 w->active = active; 2541 w->active = active;
1281 ev_ref (EV_A); 2542 ev_ref (EV_A);
1282} 2543}
1283 2544
1284inline void 2545inline_size void
1285ev_stop (EV_P_ W w) 2546ev_stop (EV_P_ W w)
1286{ 2547{
1287 ev_unref (EV_A); 2548 ev_unref (EV_A);
1288 w->active = 0; 2549 w->active = 0;
1289} 2550}
1290 2551
1291/*****************************************************************************/ 2552/*****************************************************************************/
1292 2553
1293void 2554void noinline
1294ev_io_start (EV_P_ struct ev_io *w) 2555ev_io_start (EV_P_ ev_io *w)
1295{ 2556{
1296 int fd = w->fd; 2557 int fd = w->fd;
1297 2558
2559 if (expect_false (ev_is_active (w)))
2560 return;
2561
2562 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2563 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2564
2565 EV_FREQUENT_CHECK;
2566
2567 ev_start (EV_A_ (W)w, 1);
2568 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2569 wlist_add (&anfds[fd].head, (WL)w);
2570
2571 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2572 w->events &= ~EV__IOFDSET;
2573
2574 EV_FREQUENT_CHECK;
2575}
2576
2577void noinline
2578ev_io_stop (EV_P_ ev_io *w)
2579{
2580 clear_pending (EV_A_ (W)w);
2581 if (expect_false (!ev_is_active (w)))
2582 return;
2583
2584 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2585
2586 EV_FREQUENT_CHECK;
2587
2588 wlist_del (&anfds[w->fd].head, (WL)w);
2589 ev_stop (EV_A_ (W)w);
2590
2591 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2592
2593 EV_FREQUENT_CHECK;
2594}
2595
2596void noinline
2597ev_timer_start (EV_P_ ev_timer *w)
2598{
2599 if (expect_false (ev_is_active (w)))
2600 return;
2601
2602 ev_at (w) += mn_now;
2603
2604 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2605
2606 EV_FREQUENT_CHECK;
2607
2608 ++timercnt;
2609 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2610 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2611 ANHE_w (timers [ev_active (w)]) = (WT)w;
2612 ANHE_at_cache (timers [ev_active (w)]);
2613 upheap (timers, ev_active (w));
2614
2615 EV_FREQUENT_CHECK;
2616
2617 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2618}
2619
2620void noinline
2621ev_timer_stop (EV_P_ ev_timer *w)
2622{
2623 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w)))
2625 return;
2626
2627 EV_FREQUENT_CHECK;
2628
2629 {
2630 int active = ev_active (w);
2631
2632 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2633
2634 --timercnt;
2635
2636 if (expect_true (active < timercnt + HEAP0))
2637 {
2638 timers [active] = timers [timercnt + HEAP0];
2639 adjustheap (timers, timercnt, active);
2640 }
2641 }
2642
2643 ev_at (w) -= mn_now;
2644
2645 ev_stop (EV_A_ (W)w);
2646
2647 EV_FREQUENT_CHECK;
2648}
2649
2650void noinline
2651ev_timer_again (EV_P_ ev_timer *w)
2652{
2653 EV_FREQUENT_CHECK;
2654
1298 if (ev_is_active (w)) 2655 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 { 2656 {
1368 if (w->repeat) 2657 if (w->repeat)
1369 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat); 2658 {
2659 ev_at (w) = mn_now + w->repeat;
2660 ANHE_at_cache (timers [ev_active (w)]);
2661 adjustheap (timers, timercnt, ev_active (w));
2662 }
1370 else 2663 else
1371 ev_timer_stop (EV_A_ w); 2664 ev_timer_stop (EV_A_ w);
1372 } 2665 }
1373 else if (w->repeat) 2666 else if (w->repeat)
2667 {
2668 ev_at (w) = w->repeat;
1374 ev_timer_start (EV_A_ w); 2669 ev_timer_start (EV_A_ w);
1375} 2670 }
1376 2671
2672 EV_FREQUENT_CHECK;
2673}
2674
2675ev_tstamp
2676ev_timer_remaining (EV_P_ ev_timer *w)
2677{
2678 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2679}
2680
1377#if EV_PERIODICS 2681#if EV_PERIODIC_ENABLE
1378void 2682void noinline
1379ev_periodic_start (EV_P_ struct ev_periodic *w) 2683ev_periodic_start (EV_P_ ev_periodic *w)
1380{ 2684{
1381 if (ev_is_active (w)) 2685 if (expect_false (ev_is_active (w)))
1382 return; 2686 return;
1383 2687
1384 if (w->reschedule_cb) 2688 if (w->reschedule_cb)
1385 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1386 else if (w->interval) 2690 else if (w->interval)
1387 { 2691 {
1388 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2692 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 */ 2693 /* 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; 2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1391 } 2695 }
2696 else
2697 ev_at (w) = w->offset;
1392 2698
2699 EV_FREQUENT_CHECK;
2700
2701 ++periodiccnt;
1393 ev_start (EV_A_ (W)w, ++periodiccnt); 2702 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1394 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2703 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1395 periodics [periodiccnt - 1] = w; 2704 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1396 upheap ((WT *)periodics, periodiccnt - 1); 2705 ANHE_at_cache (periodics [ev_active (w)]);
2706 upheap (periodics, ev_active (w));
1397 2707
2708 EV_FREQUENT_CHECK;
2709
1398 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2710 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1399} 2711}
1400 2712
1401void 2713void noinline
1402ev_periodic_stop (EV_P_ struct ev_periodic *w) 2714ev_periodic_stop (EV_P_ ev_periodic *w)
1403{ 2715{
1404 ev_clear_pending (EV_A_ (W)w); 2716 clear_pending (EV_A_ (W)w);
1405 if (!ev_is_active (w)) 2717 if (expect_false (!ev_is_active (w)))
1406 return; 2718 return;
1407 2719
2720 EV_FREQUENT_CHECK;
2721
2722 {
2723 int active = ev_active (w);
2724
1408 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2725 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1409 2726
1410 if (((W)w)->active < periodiccnt--) 2727 --periodiccnt;
2728
2729 if (expect_true (active < periodiccnt + HEAP0))
1411 { 2730 {
1412 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2731 periodics [active] = periodics [periodiccnt + HEAP0];
1413 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2732 adjustheap (periodics, periodiccnt, active);
1414 } 2733 }
2734 }
1415 2735
1416 ev_stop (EV_A_ (W)w); 2736 ev_stop (EV_A_ (W)w);
1417}
1418 2737
1419void 2738 EV_FREQUENT_CHECK;
2739}
2740
2741void noinline
1420ev_periodic_again (EV_P_ struct ev_periodic *w) 2742ev_periodic_again (EV_P_ ev_periodic *w)
1421{ 2743{
1422 /* TODO: use adjustheap and recalculation */ 2744 /* TODO: use adjustheap and recalculation */
1423 ev_periodic_stop (EV_A_ w); 2745 ev_periodic_stop (EV_A_ w);
1424 ev_periodic_start (EV_A_ w); 2746 ev_periodic_start (EV_A_ w);
1425} 2747}
1426#endif 2748#endif
1427 2749
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 2750#ifndef SA_RESTART
1495# define SA_RESTART 0 2751# define SA_RESTART 0
1496#endif 2752#endif
1497 2753
1498void 2754#if EV_SIGNAL_ENABLE
2755
2756void noinline
1499ev_signal_start (EV_P_ struct ev_signal *w) 2757ev_signal_start (EV_P_ ev_signal *w)
1500{ 2758{
2759 if (expect_false (ev_is_active (w)))
2760 return;
2761
2762 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2763
1501#if EV_MULTIPLICITY 2764#if EV_MULTIPLICITY
1502 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2765 assert (("libev: a signal must not be attached to two different loops",
2766 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2767
2768 signals [w->signum - 1].loop = EV_A;
2769#endif
2770
2771 EV_FREQUENT_CHECK;
2772
2773#if EV_USE_SIGNALFD
2774 if (sigfd == -2)
2775 {
2776 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2777 if (sigfd < 0 && errno == EINVAL)
2778 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2779
2780 if (sigfd >= 0)
2781 {
2782 fd_intern (sigfd); /* doing it twice will not hurt */
2783
2784 sigemptyset (&sigfd_set);
2785
2786 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2787 ev_set_priority (&sigfd_w, EV_MAXPRI);
2788 ev_io_start (EV_A_ &sigfd_w);
2789 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2790 }
2791 }
2792
2793 if (sigfd >= 0)
2794 {
2795 /* TODO: check .head */
2796 sigaddset (&sigfd_set, w->signum);
2797 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2798
2799 signalfd (sigfd, &sigfd_set, 0);
2800 }
2801#endif
2802
2803 ev_start (EV_A_ (W)w, 1);
2804 wlist_add (&signals [w->signum - 1].head, (WL)w);
2805
2806 if (!((WL)w)->next)
2807# if EV_USE_SIGNALFD
2808 if (sigfd < 0) /*TODO*/
1503#endif 2809# endif
1504 if (ev_is_active (w)) 2810 {
2811# ifdef _WIN32
2812 evpipe_init (EV_A);
2813
2814 signal (w->signum, ev_sighandler);
2815# else
2816 struct sigaction sa;
2817
2818 evpipe_init (EV_A);
2819
2820 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0);
2824
2825 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2828#endif
2829 }
2830
2831 EV_FREQUENT_CHECK;
2832}
2833
2834void noinline
2835ev_signal_stop (EV_P_ ev_signal *w)
2836{
2837 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w)))
1505 return; 2839 return;
1506 2840
1507 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2841 EV_FREQUENT_CHECK;
2842
2843 wlist_del (&signals [w->signum - 1].head, (WL)w);
2844 ev_stop (EV_A_ (W)w);
2845
2846 if (!signals [w->signum - 1].head)
2847 {
2848#if EV_MULTIPLICITY
2849 signals [w->signum - 1].loop = 0; /* unattach from signal */
2850#endif
2851#if EV_USE_SIGNALFD
2852 if (sigfd >= 0)
2853 {
2854 sigset_t ss;
2855
2856 sigemptyset (&ss);
2857 sigaddset (&ss, w->signum);
2858 sigdelset (&sigfd_set, w->signum);
2859
2860 signalfd (sigfd, &sigfd_set, 0);
2861 sigprocmask (SIG_UNBLOCK, &ss, 0);
2862 }
2863 else
2864#endif
2865 signal (w->signum, SIG_DFL);
2866 }
2867
2868 EV_FREQUENT_CHECK;
2869}
2870
2871#endif
2872
2873#if EV_CHILD_ENABLE
2874
2875void
2876ev_child_start (EV_P_ ev_child *w)
2877{
2878#if EV_MULTIPLICITY
2879 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2880#endif
2881 if (expect_false (ev_is_active (w)))
2882 return;
2883
2884 EV_FREQUENT_CHECK;
1508 2885
1509 ev_start (EV_A_ (W)w, 1); 2886 ev_start (EV_A_ (W)w, 1);
1510 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2887 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1511 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1512 2888
1513 if (!((WL)w)->next) 2889 EV_FREQUENT_CHECK;
2890}
2891
2892void
2893ev_child_stop (EV_P_ ev_child *w)
2894{
2895 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w)))
2897 return;
2898
2899 EV_FREQUENT_CHECK;
2900
2901 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2902 ev_stop (EV_A_ (W)w);
2903
2904 EV_FREQUENT_CHECK;
2905}
2906
2907#endif
2908
2909#if EV_STAT_ENABLE
2910
2911# ifdef _WIN32
2912# undef lstat
2913# define lstat(a,b) _stati64 (a,b)
2914# endif
2915
2916#define DEF_STAT_INTERVAL 5.0074891
2917#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2918#define MIN_STAT_INTERVAL 0.1074891
2919
2920static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2921
2922#if EV_USE_INOTIFY
2923
2924/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2925# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2926
2927static void noinline
2928infy_add (EV_P_ ev_stat *w)
2929{
2930 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);
2931
2932 if (w->wd >= 0)
2933 {
2934 struct statfs sfs;
2935
2936 /* now local changes will be tracked by inotify, but remote changes won't */
2937 /* unless the filesystem is known to be local, we therefore still poll */
2938 /* also do poll on <2.6.25, but with normal frequency */
2939
2940 if (!fs_2625)
2941 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2942 else if (!statfs (w->path, &sfs)
2943 && (sfs.f_type == 0x1373 /* devfs */
2944 || sfs.f_type == 0xEF53 /* ext2/3 */
2945 || sfs.f_type == 0x3153464a /* jfs */
2946 || sfs.f_type == 0x52654973 /* reiser3 */
2947 || sfs.f_type == 0x01021994 /* tempfs */
2948 || sfs.f_type == 0x58465342 /* xfs */))
2949 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2950 else
2951 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1514 { 2952 }
1515#if WIN32 2953 else
1516 signal (w->signum, sighandler); 2954 {
2955 /* can't use inotify, continue to stat */
2956 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2957
2958 /* if path is not there, monitor some parent directory for speedup hints */
2959 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2960 /* but an efficiency issue only */
2961 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2962 {
2963 char path [4096];
2964 strcpy (path, w->path);
2965
2966 do
2967 {
2968 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2969 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2970
2971 char *pend = strrchr (path, '/');
2972
2973 if (!pend || pend == path)
2974 break;
2975
2976 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 }
2981 }
2982
2983 if (w->wd >= 0)
2984 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2985
2986 /* now re-arm timer, if required */
2987 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2988 ev_timer_again (EV_A_ &w->timer);
2989 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2990}
2991
2992static void noinline
2993infy_del (EV_P_ ev_stat *w)
2994{
2995 int slot;
2996 int wd = w->wd;
2997
2998 if (wd < 0)
2999 return;
3000
3001 w->wd = -2;
3002 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3003 wlist_del (&fs_hash [slot].head, (WL)w);
3004
3005 /* remove this watcher, if others are watching it, they will rearm */
3006 inotify_rm_watch (fs_fd, wd);
3007}
3008
3009static void noinline
3010infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3011{
3012 if (slot < 0)
3013 /* overflow, need to check for all hash slots */
3014 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3015 infy_wd (EV_A_ slot, wd, ev);
3016 else
3017 {
3018 WL w_;
3019
3020 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3021 {
3022 ev_stat *w = (ev_stat *)w_;
3023 w_ = w_->next; /* lets us remove this watcher and all before it */
3024
3025 if (w->wd == wd || wd == -1)
3026 {
3027 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3028 {
3029 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3030 w->wd = -1;
3031 infy_add (EV_A_ w); /* re-add, no matter what */
3032 }
3033
3034 stat_timer_cb (EV_A_ &w->timer, 0);
3035 }
3036 }
3037 }
3038}
3039
3040static void
3041infy_cb (EV_P_ ev_io *w, int revents)
3042{
3043 char buf [EV_INOTIFY_BUFSIZE];
3044 int ofs;
3045 int len = read (fs_fd, buf, sizeof (buf));
3046
3047 for (ofs = 0; ofs < len; )
3048 {
3049 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len;
3052 }
3053}
3054
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
3060 int i;
3061 char *p = buf.release;
3062
3063 if (uname (&buf))
3064 return 0;
3065
3066 for (i = 3+1; --i; )
3067 {
3068 unsigned int c = 0;
3069
3070 for (;;)
3071 {
3072 if (*p >= '0' && *p <= '9')
3073 c = c * 10 + *p++ - '0';
3074 else
3075 {
3076 p += *p == '.';
3077 break;
3078 }
3079 }
3080
3081 v = (v << 8) | c;
3082 }
3083
3084 return v;
3085}
3086
3087inline_size void
3088ev_check_2625 (EV_P)
3089{
3090 /* kernels < 2.6.25 are borked
3091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3092 */
3093 if (ev_linux_version () < 0x020619)
3094 return;
3095
3096 fs_2625 = 1;
3097}
3098
3099inline_size int
3100infy_newfd (void)
3101{
3102#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3104 if (fd >= 0)
3105 return fd;
3106#endif
3107 return inotify_init ();
3108}
3109
3110inline_size void
3111infy_init (EV_P)
3112{
3113 if (fs_fd != -2)
3114 return;
3115
3116 fs_fd = -1;
3117
3118 ev_check_2625 (EV_A);
3119
3120 fs_fd = infy_newfd ();
3121
3122 if (fs_fd >= 0)
3123 {
3124 fd_intern (fs_fd);
3125 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3126 ev_set_priority (&fs_w, EV_MAXPRI);
3127 ev_io_start (EV_A_ &fs_w);
3128 ev_unref (EV_A);
3129 }
3130}
3131
3132inline_size void
3133infy_fork (EV_P)
3134{
3135 int slot;
3136
3137 if (fs_fd < 0)
3138 return;
3139
3140 ev_ref (EV_A);
3141 ev_io_stop (EV_A_ &fs_w);
3142 close (fs_fd);
3143 fs_fd = infy_newfd ();
3144
3145 if (fs_fd >= 0)
3146 {
3147 fd_intern (fs_fd);
3148 ev_io_set (&fs_w, fs_fd, EV_READ);
3149 ev_io_start (EV_A_ &fs_w);
3150 ev_unref (EV_A);
3151 }
3152
3153 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3154 {
3155 WL w_ = fs_hash [slot].head;
3156 fs_hash [slot].head = 0;
3157
3158 while (w_)
3159 {
3160 ev_stat *w = (ev_stat *)w_;
3161 w_ = w_->next; /* lets us add this watcher */
3162
3163 w->wd = -1;
3164
3165 if (fs_fd >= 0)
3166 infy_add (EV_A_ w); /* re-add, no matter what */
3167 else
3168 {
3169 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3170 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3171 ev_timer_again (EV_A_ &w->timer);
3172 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3173 }
3174 }
3175 }
3176}
3177
3178#endif
3179
3180#ifdef _WIN32
3181# define EV_LSTAT(p,b) _stati64 (p, b)
1517#else 3182#else
1518 struct sigaction sa; 3183# 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 3184#endif
1524 }
1525}
1526 3185
1527void 3186void
1528ev_signal_stop (EV_P_ struct ev_signal *w) 3187ev_stat_stat (EV_P_ ev_stat *w)
1529{ 3188{
1530 ev_clear_pending (EV_A_ (W)w); 3189 if (lstat (w->path, &w->attr) < 0)
1531 if (!ev_is_active (w)) 3190 w->attr.st_nlink = 0;
3191 else if (!w->attr.st_nlink)
3192 w->attr.st_nlink = 1;
3193}
3194
3195static void noinline
3196stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3197{
3198 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3199
3200 ev_statdata prev = w->attr;
3201 ev_stat_stat (EV_A_ w);
3202
3203 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3204 if (
3205 prev.st_dev != w->attr.st_dev
3206 || prev.st_ino != w->attr.st_ino
3207 || prev.st_mode != w->attr.st_mode
3208 || prev.st_nlink != w->attr.st_nlink
3209 || prev.st_uid != w->attr.st_uid
3210 || prev.st_gid != w->attr.st_gid
3211 || prev.st_rdev != w->attr.st_rdev
3212 || prev.st_size != w->attr.st_size
3213 || prev.st_atime != w->attr.st_atime
3214 || prev.st_mtime != w->attr.st_mtime
3215 || prev.st_ctime != w->attr.st_ctime
3216 ) {
3217 /* we only update w->prev on actual differences */
3218 /* in case we test more often than invoke the callback, */
3219 /* to ensure that prev is always different to attr */
3220 w->prev = prev;
3221
3222 #if EV_USE_INOTIFY
3223 if (fs_fd >= 0)
3224 {
3225 infy_del (EV_A_ w);
3226 infy_add (EV_A_ w);
3227 ev_stat_stat (EV_A_ w); /* avoid race... */
3228 }
3229 #endif
3230
3231 ev_feed_event (EV_A_ w, EV_STAT);
3232 }
3233}
3234
3235void
3236ev_stat_start (EV_P_ ev_stat *w)
3237{
3238 if (expect_false (ev_is_active (w)))
1532 return; 3239 return;
1533 3240
1534 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3241 ev_stat_stat (EV_A_ w);
3242
3243 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3244 w->interval = MIN_STAT_INTERVAL;
3245
3246 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3247 ev_set_priority (&w->timer, ev_priority (w));
3248
3249#if EV_USE_INOTIFY
3250 infy_init (EV_A);
3251
3252 if (fs_fd >= 0)
3253 infy_add (EV_A_ w);
3254 else
3255#endif
3256 {
3257 ev_timer_again (EV_A_ &w->timer);
3258 ev_unref (EV_A);
3259 }
3260
3261 ev_start (EV_A_ (W)w, 1);
3262
3263 EV_FREQUENT_CHECK;
3264}
3265
3266void
3267ev_stat_stop (EV_P_ ev_stat *w)
3268{
3269 clear_pending (EV_A_ (W)w);
3270 if (expect_false (!ev_is_active (w)))
3271 return;
3272
3273 EV_FREQUENT_CHECK;
3274
3275#if EV_USE_INOTIFY
3276 infy_del (EV_A_ w);
3277#endif
3278
3279 if (ev_is_active (&w->timer))
3280 {
3281 ev_ref (EV_A);
3282 ev_timer_stop (EV_A_ &w->timer);
3283 }
3284
1535 ev_stop (EV_A_ (W)w); 3285 ev_stop (EV_A_ (W)w);
1536 3286
1537 if (!signals [w->signum - 1].head) 3287 EV_FREQUENT_CHECK;
1538 signal (w->signum, SIG_DFL);
1539} 3288}
3289#endif
1540 3290
3291#if EV_IDLE_ENABLE
1541void 3292void
1542ev_child_start (EV_P_ struct ev_child *w) 3293ev_idle_start (EV_P_ ev_idle *w)
1543{ 3294{
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)) 3295 if (expect_false (ev_is_active (w)))
1548 return; 3296 return;
1549 3297
3298 pri_adjust (EV_A_ (W)w);
3299
3300 EV_FREQUENT_CHECK;
3301
3302 {
3303 int active = ++idlecnt [ABSPRI (w)];
3304
3305 ++idleall;
3306 ev_start (EV_A_ (W)w, active);
3307
3308 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3309 idles [ABSPRI (w)][active - 1] = w;
3310 }
3311
3312 EV_FREQUENT_CHECK;
3313}
3314
3315void
3316ev_idle_stop (EV_P_ ev_idle *w)
3317{
3318 clear_pending (EV_A_ (W)w);
3319 if (expect_false (!ev_is_active (w)))
3320 return;
3321
3322 EV_FREQUENT_CHECK;
3323
3324 {
3325 int active = ev_active (w);
3326
3327 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3328 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3329
3330 ev_stop (EV_A_ (W)w);
3331 --idleall;
3332 }
3333
3334 EV_FREQUENT_CHECK;
3335}
3336#endif
3337
3338#if EV_PREPARE_ENABLE
3339void
3340ev_prepare_start (EV_P_ ev_prepare *w)
3341{
3342 if (expect_false (ev_is_active (w)))
3343 return;
3344
3345 EV_FREQUENT_CHECK;
3346
3347 ev_start (EV_A_ (W)w, ++preparecnt);
3348 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3349 prepares [preparecnt - 1] = w;
3350
3351 EV_FREQUENT_CHECK;
3352}
3353
3354void
3355ev_prepare_stop (EV_P_ ev_prepare *w)
3356{
3357 clear_pending (EV_A_ (W)w);
3358 if (expect_false (!ev_is_active (w)))
3359 return;
3360
3361 EV_FREQUENT_CHECK;
3362
3363 {
3364 int active = ev_active (w);
3365
3366 prepares [active - 1] = prepares [--preparecnt];
3367 ev_active (prepares [active - 1]) = active;
3368 }
3369
3370 ev_stop (EV_A_ (W)w);
3371
3372 EV_FREQUENT_CHECK;
3373}
3374#endif
3375
3376#if EV_CHECK_ENABLE
3377void
3378ev_check_start (EV_P_ ev_check *w)
3379{
3380 if (expect_false (ev_is_active (w)))
3381 return;
3382
3383 EV_FREQUENT_CHECK;
3384
3385 ev_start (EV_A_ (W)w, ++checkcnt);
3386 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3387 checks [checkcnt - 1] = w;
3388
3389 EV_FREQUENT_CHECK;
3390}
3391
3392void
3393ev_check_stop (EV_P_ ev_check *w)
3394{
3395 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w)))
3397 return;
3398
3399 EV_FREQUENT_CHECK;
3400
3401 {
3402 int active = ev_active (w);
3403
3404 checks [active - 1] = checks [--checkcnt];
3405 ev_active (checks [active - 1]) = active;
3406 }
3407
3408 ev_stop (EV_A_ (W)w);
3409
3410 EV_FREQUENT_CHECK;
3411}
3412#endif
3413
3414#if EV_EMBED_ENABLE
3415void noinline
3416ev_embed_sweep (EV_P_ ev_embed *w)
3417{
3418 ev_run (w->other, EVRUN_NOWAIT);
3419}
3420
3421static void
3422embed_io_cb (EV_P_ ev_io *io, int revents)
3423{
3424 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3425
3426 if (ev_cb (w))
3427 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3428 else
3429 ev_run (w->other, EVRUN_NOWAIT);
3430}
3431
3432static void
3433embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3434{
3435 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3436
3437 {
3438 EV_P = w->other;
3439
3440 while (fdchangecnt)
3441 {
3442 fd_reify (EV_A);
3443 ev_run (EV_A_ EVRUN_NOWAIT);
3444 }
3445 }
3446}
3447
3448static void
3449embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3450{
3451 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3452
3453 ev_embed_stop (EV_A_ w);
3454
3455 {
3456 EV_P = w->other;
3457
3458 ev_loop_fork (EV_A);
3459 ev_run (EV_A_ EVRUN_NOWAIT);
3460 }
3461
3462 ev_embed_start (EV_A_ w);
3463}
3464
3465#if 0
3466static void
3467embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3468{
3469 ev_idle_stop (EV_A_ idle);
3470}
3471#endif
3472
3473void
3474ev_embed_start (EV_P_ ev_embed *w)
3475{
3476 if (expect_false (ev_is_active (w)))
3477 return;
3478
3479 {
3480 EV_P = w->other;
3481 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3482 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3483 }
3484
3485 EV_FREQUENT_CHECK;
3486
3487 ev_set_priority (&w->io, ev_priority (w));
3488 ev_io_start (EV_A_ &w->io);
3489
3490 ev_prepare_init (&w->prepare, embed_prepare_cb);
3491 ev_set_priority (&w->prepare, EV_MINPRI);
3492 ev_prepare_start (EV_A_ &w->prepare);
3493
3494 ev_fork_init (&w->fork, embed_fork_cb);
3495 ev_fork_start (EV_A_ &w->fork);
3496
3497 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3498
1550 ev_start (EV_A_ (W)w, 1); 3499 ev_start (EV_A_ (W)w, 1);
1551 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1552}
1553 3500
3501 EV_FREQUENT_CHECK;
3502}
3503
1554void 3504void
1555ev_child_stop (EV_P_ struct ev_child *w) 3505ev_embed_stop (EV_P_ ev_embed *w)
1556{ 3506{
1557 ev_clear_pending (EV_A_ (W)w); 3507 clear_pending (EV_A_ (W)w);
1558 if (!ev_is_active (w)) 3508 if (expect_false (!ev_is_active (w)))
1559 return; 3509 return;
1560 3510
1561 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3511 EV_FREQUENT_CHECK;
3512
3513 ev_io_stop (EV_A_ &w->io);
3514 ev_prepare_stop (EV_A_ &w->prepare);
3515 ev_fork_stop (EV_A_ &w->fork);
3516
1562 ev_stop (EV_A_ (W)w); 3517 ev_stop (EV_A_ (W)w);
3518
3519 EV_FREQUENT_CHECK;
1563} 3520}
3521#endif
3522
3523#if EV_FORK_ENABLE
3524void
3525ev_fork_start (EV_P_ ev_fork *w)
3526{
3527 if (expect_false (ev_is_active (w)))
3528 return;
3529
3530 EV_FREQUENT_CHECK;
3531
3532 ev_start (EV_A_ (W)w, ++forkcnt);
3533 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3534 forks [forkcnt - 1] = w;
3535
3536 EV_FREQUENT_CHECK;
3537}
3538
3539void
3540ev_fork_stop (EV_P_ ev_fork *w)
3541{
3542 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w)))
3544 return;
3545
3546 EV_FREQUENT_CHECK;
3547
3548 {
3549 int active = ev_active (w);
3550
3551 forks [active - 1] = forks [--forkcnt];
3552 ev_active (forks [active - 1]) = active;
3553 }
3554
3555 ev_stop (EV_A_ (W)w);
3556
3557 EV_FREQUENT_CHECK;
3558}
3559#endif
3560
3561#if EV_ASYNC_ENABLE
3562void
3563ev_async_start (EV_P_ ev_async *w)
3564{
3565 if (expect_false (ev_is_active (w)))
3566 return;
3567
3568 w->sent = 0;
3569
3570 evpipe_init (EV_A);
3571
3572 EV_FREQUENT_CHECK;
3573
3574 ev_start (EV_A_ (W)w, ++asynccnt);
3575 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3576 asyncs [asynccnt - 1] = w;
3577
3578 EV_FREQUENT_CHECK;
3579}
3580
3581void
3582ev_async_stop (EV_P_ ev_async *w)
3583{
3584 clear_pending (EV_A_ (W)w);
3585 if (expect_false (!ev_is_active (w)))
3586 return;
3587
3588 EV_FREQUENT_CHECK;
3589
3590 {
3591 int active = ev_active (w);
3592
3593 asyncs [active - 1] = asyncs [--asynccnt];
3594 ev_active (asyncs [active - 1]) = active;
3595 }
3596
3597 ev_stop (EV_A_ (W)w);
3598
3599 EV_FREQUENT_CHECK;
3600}
3601
3602void
3603ev_async_send (EV_P_ ev_async *w)
3604{
3605 w->sent = 1;
3606 evpipe_write (EV_A_ &async_pending);
3607}
3608#endif
1564 3609
1565/*****************************************************************************/ 3610/*****************************************************************************/
1566 3611
1567struct ev_once 3612struct ev_once
1568{ 3613{
1569 struct ev_io io; 3614 ev_io io;
1570 struct ev_timer to; 3615 ev_timer to;
1571 void (*cb)(int revents, void *arg); 3616 void (*cb)(int revents, void *arg);
1572 void *arg; 3617 void *arg;
1573}; 3618};
1574 3619
1575static void 3620static void
1576once_cb (EV_P_ struct ev_once *once, int revents) 3621once_cb (EV_P_ struct ev_once *once, int revents)
1577{ 3622{
1578 void (*cb)(int revents, void *arg) = once->cb; 3623 void (*cb)(int revents, void *arg) = once->cb;
1579 void *arg = once->arg; 3624 void *arg = once->arg;
1580 3625
1581 ev_io_stop (EV_A_ &once->io); 3626 ev_io_stop (EV_A_ &once->io);
1582 ev_timer_stop (EV_A_ &once->to); 3627 ev_timer_stop (EV_A_ &once->to);
1583 ev_free (once); 3628 ev_free (once);
1584 3629
1585 cb (revents, arg); 3630 cb (revents, arg);
1586} 3631}
1587 3632
1588static void 3633static void
1589once_cb_io (EV_P_ struct ev_io *w, int revents) 3634once_cb_io (EV_P_ ev_io *w, int revents)
1590{ 3635{
1591 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3636 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3637
3638 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1592} 3639}
1593 3640
1594static void 3641static void
1595once_cb_to (EV_P_ struct ev_timer *w, int revents) 3642once_cb_to (EV_P_ ev_timer *w, int revents)
1596{ 3643{
1597 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3644 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3645
3646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1598} 3647}
1599 3648
1600void 3649void
1601ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3650ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1602{ 3651{
1603 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3652 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1604 3653
1605 if (!once) 3654 if (expect_false (!once))
3655 {
1606 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3656 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1607 else 3657 return;
1608 { 3658 }
3659
1609 once->cb = cb; 3660 once->cb = cb;
1610 once->arg = arg; 3661 once->arg = arg;
1611 3662
1612 ev_init (&once->io, once_cb_io); 3663 ev_init (&once->io, once_cb_io);
1613 if (fd >= 0) 3664 if (fd >= 0)
3665 {
3666 ev_io_set (&once->io, fd, events);
3667 ev_io_start (EV_A_ &once->io);
3668 }
3669
3670 ev_init (&once->to, once_cb_to);
3671 if (timeout >= 0.)
3672 {
3673 ev_timer_set (&once->to, timeout, 0.);
3674 ev_timer_start (EV_A_ &once->to);
3675 }
3676}
3677
3678/*****************************************************************************/
3679
3680#if EV_WALK_ENABLE
3681void
3682ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3683{
3684 int i, j;
3685 ev_watcher_list *wl, *wn;
3686
3687 if (types & (EV_IO | EV_EMBED))
3688 for (i = 0; i < anfdmax; ++i)
3689 for (wl = anfds [i].head; wl; )
1614 { 3690 {
1615 ev_io_set (&once->io, fd, events); 3691 wn = wl->next;
1616 ev_io_start (EV_A_ &once->io); 3692
3693#if EV_EMBED_ENABLE
3694 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3695 {
3696 if (types & EV_EMBED)
3697 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3698 }
3699 else
3700#endif
3701#if EV_USE_INOTIFY
3702 if (ev_cb ((ev_io *)wl) == infy_cb)
3703 ;
3704 else
3705#endif
3706 if ((ev_io *)wl != &pipe_w)
3707 if (types & EV_IO)
3708 cb (EV_A_ EV_IO, wl);
3709
3710 wl = wn;
1617 } 3711 }
1618 3712
1619 ev_init (&once->to, once_cb_to); 3713 if (types & (EV_TIMER | EV_STAT))
1620 if (timeout >= 0.) 3714 for (i = timercnt + HEAP0; i-- > HEAP0; )
3715#if EV_STAT_ENABLE
3716 /*TODO: timer is not always active*/
3717 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1621 { 3718 {
1622 ev_timer_set (&once->to, timeout, 0.); 3719 if (types & EV_STAT)
1623 ev_timer_start (EV_A_ &once->to); 3720 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1624 } 3721 }
1625 } 3722 else
1626} 3723#endif
3724 if (types & EV_TIMER)
3725 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1627 3726
1628#ifdef __cplusplus 3727#if EV_PERIODIC_ENABLE
1629} 3728 if (types & EV_PERIODIC)
3729 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3730 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3731#endif
3732
3733#if EV_IDLE_ENABLE
3734 if (types & EV_IDLE)
3735 for (j = NUMPRI; i--; )
3736 for (i = idlecnt [j]; i--; )
3737 cb (EV_A_ EV_IDLE, idles [j][i]);
3738#endif
3739
3740#if EV_FORK_ENABLE
3741 if (types & EV_FORK)
3742 for (i = forkcnt; i--; )
3743 if (ev_cb (forks [i]) != embed_fork_cb)
3744 cb (EV_A_ EV_FORK, forks [i]);
3745#endif
3746
3747#if EV_ASYNC_ENABLE
3748 if (types & EV_ASYNC)
3749 for (i = asynccnt; i--; )
3750 cb (EV_A_ EV_ASYNC, asyncs [i]);
3751#endif
3752
3753#if EV_PREPARE_ENABLE
3754 if (types & EV_PREPARE)
3755 for (i = preparecnt; i--; )
3756# if EV_EMBED_ENABLE
3757 if (ev_cb (prepares [i]) != embed_prepare_cb)
1630#endif 3758# endif
3759 cb (EV_A_ EV_PREPARE, prepares [i]);
3760#endif
1631 3761
3762#if EV_CHECK_ENABLE
3763 if (types & EV_CHECK)
3764 for (i = checkcnt; i--; )
3765 cb (EV_A_ EV_CHECK, checks [i]);
3766#endif
3767
3768#if EV_SIGNAL_ENABLE
3769 if (types & EV_SIGNAL)
3770 for (i = 0; i < EV_NSIG - 1; ++i)
3771 for (wl = signals [i].head; wl; )
3772 {
3773 wn = wl->next;
3774 cb (EV_A_ EV_SIGNAL, wl);
3775 wl = wn;
3776 }
3777#endif
3778
3779#if EV_CHILD_ENABLE
3780 if (types & EV_CHILD)
3781 for (i = (EV_PID_HASHSIZE); i--; )
3782 for (wl = childs [i]; wl; )
3783 {
3784 wn = wl->next;
3785 cb (EV_A_ EV_CHILD, wl);
3786 wl = wn;
3787 }
3788#endif
3789/* EV_STAT 0x00001000 /* stat data changed */
3790/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3791}
3792#endif
3793
3794#if EV_MULTIPLICITY
3795 #include "ev_wrap.h"
3796#endif
3797
3798EV_CPP(})
3799

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