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Comparing libev/ev.c (file contents):
Revision 1.171 by root, Sun Dec 9 02:12:43 2007 UTC vs.
Revision 1.474 by root, Wed Feb 11 19:20:21 2015 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) 2007,2008,2009,2010,2011,2012,2013 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:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
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
37# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 43# include EV_CONFIG_H
39# else 44# else
40# include "config.h" 45# include "config.h"
41# endif 46# endif
42 47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
43# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
46# endif 71# endif
47# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
49# endif 74# endif
50# else 75# else
51# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
53# endif 78# endif
54# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
56# endif 81# endif
57# endif 82# endif
58 83
84# if HAVE_NANOSLEEP
59# ifndef EV_USE_SELECT 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif 87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
65# endif 91# endif
66 92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
67# ifndef EV_USE_POLL 94# ifndef EV_USE_SELECT
68# if HAVE_POLL && HAVE_POLL_H 95# define EV_USE_SELECT EV_FEATURE_BACKENDS
69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
73# endif 109# endif
74 110
75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
78# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
79# define EV_USE_EPOLL 0
80# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
81# endif 118# endif
82 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
83# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
89# endif 127# endif
90 128
91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
93# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
94# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
95# define EV_USE_PORT 0
96# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
97# endif 136# endif
98 137
99# ifndef EV_USE_INOTIFY
100# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
101# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
102# else
103# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
104# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
105# endif 145# endif
106 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
107#endif 154# endif
108 155
109#include <math.h> 156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
110#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
111#include <fcntl.h> 169#include <fcntl.h>
112#include <stddef.h> 170#include <stddef.h>
113 171
114#include <stdio.h> 172#include <stdio.h>
115 173
116#include <assert.h> 174#include <assert.h>
117#include <errno.h> 175#include <errno.h>
118#include <sys/types.h> 176#include <sys/types.h>
119#include <time.h> 177#include <time.h>
178#include <limits.h>
120 179
121#include <signal.h> 180#include <signal.h>
122 181
123#ifdef EV_H 182#ifdef EV_H
124# include EV_H 183# include EV_H
125#else 184#else
126# include "ev.h" 185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
127#endif 197#endif
128 198
129#ifndef _WIN32 199#ifndef _WIN32
130# include <sys/time.h> 200# include <sys/time.h>
131# include <sys/wait.h> 201# include <sys/wait.h>
132# include <unistd.h> 202# include <unistd.h>
133#else 203#else
204# include <io.h>
134# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
135# include <windows.h> 207# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
138# endif 210# endif
211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
247#endif
248
249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
251#endif
252
253#ifndef EV_USE_CLOCK_SYSCALL
254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
256# else
257# define EV_USE_CLOCK_SYSCALL 0
139#endif 258# endif
259#endif
140 260
141/**/ 261#if !(_POSIX_TIMERS > 0)
262# ifndef EV_USE_MONOTONIC
263# define EV_USE_MONOTONIC 0
264# endif
265# ifndef EV_USE_REALTIME
266# define EV_USE_REALTIME 0
267# endif
268#endif
142 269
143#ifndef EV_USE_MONOTONIC 270#ifndef EV_USE_MONOTONIC
271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
272# define EV_USE_MONOTONIC EV_FEATURE_OS
273# else
144# define EV_USE_MONOTONIC 0 274# define EV_USE_MONOTONIC 0
275# endif
145#endif 276#endif
146 277
147#ifndef EV_USE_REALTIME 278#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 279# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
280#endif
281
282#ifndef EV_USE_NANOSLEEP
283# if _POSIX_C_SOURCE >= 199309L
284# define EV_USE_NANOSLEEP EV_FEATURE_OS
285# else
286# define EV_USE_NANOSLEEP 0
287# endif
149#endif 288#endif
150 289
151#ifndef EV_USE_SELECT 290#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 291# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 292#endif
154 293
155#ifndef EV_USE_POLL 294#ifndef EV_USE_POLL
156# ifdef _WIN32 295# ifdef _WIN32
157# define EV_USE_POLL 0 296# define EV_USE_POLL 0
158# else 297# else
159# define EV_USE_POLL 1 298# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 299# endif
161#endif 300#endif
162 301
163#ifndef EV_USE_EPOLL 302#ifndef EV_USE_EPOLL
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_EPOLL EV_FEATURE_BACKENDS
305# else
164# define EV_USE_EPOLL 0 306# define EV_USE_EPOLL 0
307# endif
165#endif 308#endif
166 309
167#ifndef EV_USE_KQUEUE 310#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 311# define EV_USE_KQUEUE 0
169#endif 312#endif
… …
171#ifndef EV_USE_PORT 314#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 315# define EV_USE_PORT 0
173#endif 316#endif
174 317
175#ifndef EV_USE_INOTIFY 318#ifndef EV_USE_INOTIFY
319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
320# define EV_USE_INOTIFY EV_FEATURE_OS
321# else
176# define EV_USE_INOTIFY 0 322# define EV_USE_INOTIFY 0
323# endif
177#endif 324#endif
178 325
179#ifndef EV_PID_HASHSIZE 326#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 327# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 328#endif
329
330#ifndef EV_INOTIFY_HASHSIZE
331# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
332#endif
333
334#ifndef EV_USE_EVENTFD
335# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
336# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 337# else
183# define EV_PID_HASHSIZE 16 338# define EV_USE_EVENTFD 0
184# endif 339# endif
185#endif 340#endif
186 341
187#ifndef EV_INOTIFY_HASHSIZE 342#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 343# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 344# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 345# else
191# define EV_INOTIFY_HASHSIZE 16 346# define EV_USE_SIGNALFD 0
192# endif 347# endif
193#endif 348#endif
194 349
195/**/ 350#if 0 /* debugging */
351# define EV_VERIFY 3
352# define EV_USE_4HEAP 1
353# define EV_HEAP_CACHE_AT 1
354#endif
355
356#ifndef EV_VERIFY
357# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
358#endif
359
360#ifndef EV_USE_4HEAP
361# define EV_USE_4HEAP EV_FEATURE_DATA
362#endif
363
364#ifndef EV_HEAP_CACHE_AT
365# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
366#endif
367
368#ifdef ANDROID
369/* supposedly, android doesn't typedef fd_mask */
370# undef EV_USE_SELECT
371# define EV_USE_SELECT 0
372/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
373# undef EV_USE_CLOCK_SYSCALL
374# define EV_USE_CLOCK_SYSCALL 0
375#endif
376
377/* aix's poll.h seems to cause lots of trouble */
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
383
384/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
385/* which makes programs even slower. might work on other unices, too. */
386#if EV_USE_CLOCK_SYSCALL
387# include <sys/syscall.h>
388# ifdef SYS_clock_gettime
389# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
390# undef EV_USE_MONOTONIC
391# define EV_USE_MONOTONIC 1
392# else
393# undef EV_USE_CLOCK_SYSCALL
394# define EV_USE_CLOCK_SYSCALL 0
395# endif
396#endif
397
398/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196 399
197#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 401# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 402# define EV_USE_MONOTONIC 0
200#endif 403#endif
… …
202#ifndef CLOCK_REALTIME 405#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 406# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 407# define EV_USE_REALTIME 0
205#endif 408#endif
206 409
207#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h>
209#endif
210
211#if !EV_STAT_ENABLE 410#if !EV_STAT_ENABLE
411# undef EV_USE_INOTIFY
212# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
213#endif 413#endif
214 414
415#if !EV_USE_NANOSLEEP
416/* hp-ux has it in sys/time.h, which we unconditionally include above */
417# if !defined _WIN32 && !defined __hpux
418# include <sys/select.h>
419# endif
420#endif
421
215#if EV_USE_INOTIFY 422#if EV_USE_INOTIFY
423# include <sys/statfs.h>
216# include <sys/inotify.h> 424# include <sys/inotify.h>
425/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
426# ifndef IN_DONT_FOLLOW
427# undef EV_USE_INOTIFY
428# define EV_USE_INOTIFY 0
429# endif
430#endif
431
432#if EV_USE_EVENTFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef EFD_NONBLOCK
436# define EFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef EFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define EFD_CLOEXEC O_CLOEXEC
441# else
442# define EFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
446#endif
447
448#if EV_USE_SIGNALFD
449/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
450# include <stdint.h>
451# ifndef SFD_NONBLOCK
452# define SFD_NONBLOCK O_NONBLOCK
453# endif
454# ifndef SFD_CLOEXEC
455# ifdef O_CLOEXEC
456# define SFD_CLOEXEC O_CLOEXEC
457# else
458# define SFD_CLOEXEC 02000000
459# endif
460# endif
461EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
462
463struct signalfd_siginfo
464{
465 uint32_t ssi_signo;
466 char pad[128 - sizeof (uint32_t)];
467};
217#endif 468#endif
218 469
219/**/ 470/**/
471
472#if EV_VERIFY >= 3
473# define EV_FREQUENT_CHECK ev_verify (EV_A)
474#else
475# define EV_FREQUENT_CHECK do { } while (0)
476#endif
477
478/*
479 * This is used to work around floating point rounding problems.
480 * This value is good at least till the year 4000.
481 */
482#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
483/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
220 484
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 485#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 486#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
224 487
488#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
489#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
490
491/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
492/* ECB.H BEGIN */
493/*
494 * libecb - http://software.schmorp.de/pkg/libecb
495 *
496 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
497 * Copyright (©) 2011 Emanuele Giaquinta
498 * All rights reserved.
499 *
500 * Redistribution and use in source and binary forms, with or without modifica-
501 * tion, are permitted provided that the following conditions are met:
502 *
503 * 1. Redistributions of source code must retain the above copyright notice,
504 * this list of conditions and the following disclaimer.
505 *
506 * 2. Redistributions in binary form must reproduce the above copyright
507 * notice, this list of conditions and the following disclaimer in the
508 * documentation and/or other materials provided with the distribution.
509 *
510 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
511 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
512 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
513 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
514 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
515 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
516 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
517 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
518 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
519 * OF THE POSSIBILITY OF SUCH DAMAGE.
520 *
521 * Alternatively, the contents of this file may be used under the terms of
522 * the GNU General Public License ("GPL") version 2 or any later version,
523 * in which case the provisions of the GPL are applicable instead of
524 * the above. If you wish to allow the use of your version of this file
525 * only under the terms of the GPL and not to allow others to use your
526 * version of this file under the BSD license, indicate your decision
527 * by deleting the provisions above and replace them with the notice
528 * and other provisions required by the GPL. If you do not delete the
529 * provisions above, a recipient may use your version of this file under
530 * either the BSD or the GPL.
531 */
532
533#ifndef ECB_H
534#define ECB_H
535
536/* 16 bits major, 16 bits minor */
537#define ECB_VERSION 0x00010004
538
539#ifdef _WIN32
540 typedef signed char int8_t;
541 typedef unsigned char uint8_t;
542 typedef signed short int16_t;
543 typedef unsigned short uint16_t;
544 typedef signed int int32_t;
545 typedef unsigned int uint32_t;
225#if __GNUC__ >= 3 546 #if __GNUC__
226# define expect(expr,value) __builtin_expect ((expr),(value)) 547 typedef signed long long int64_t;
227# define noinline __attribute__ ((noinline)) 548 typedef unsigned long long uint64_t;
549 #else /* _MSC_VER || __BORLANDC__ */
550 typedef signed __int64 int64_t;
551 typedef unsigned __int64 uint64_t;
552 #endif
553 #ifdef _WIN64
554 #define ECB_PTRSIZE 8
555 typedef uint64_t uintptr_t;
556 typedef int64_t intptr_t;
557 #else
558 #define ECB_PTRSIZE 4
559 typedef uint32_t uintptr_t;
560 typedef int32_t intptr_t;
561 #endif
228#else 562#else
229# define expect(expr,value) (expr) 563 #include <inttypes.h>
230# define noinline 564 #if UINTMAX_MAX > 0xffffffffU
231# if __STDC_VERSION__ < 199901L 565 #define ECB_PTRSIZE 8
232# define inline 566 #else
567 #define ECB_PTRSIZE 4
568 #endif
233# endif 569#endif
570
571/* work around x32 idiocy by defining proper macros */
572#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
573 #if _ILP32
574 #define ECB_AMD64_X32 1
575 #else
576 #define ECB_AMD64 1
234#endif 577 #endif
578#endif
235 579
580/* many compilers define _GNUC_ to some versions but then only implement
581 * what their idiot authors think are the "more important" extensions,
582 * causing enormous grief in return for some better fake benchmark numbers.
583 * or so.
584 * we try to detect these and simply assume they are not gcc - if they have
585 * an issue with that they should have done it right in the first place.
586 */
587#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
588 #define ECB_GCC_VERSION(major,minor) 0
589#else
590 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
591#endif
592
593#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
594
595#if __clang__ && defined __has_builtin
596 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
597#else
598 #define ECB_CLANG_BUILTIN(x) 0
599#endif
600
601#if __clang__ && defined __has_extension
602 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
603#else
604 #define ECB_CLANG_EXTENSION(x) 0
605#endif
606
607#define ECB_CPP (__cplusplus+0)
608#define ECB_CPP11 (__cplusplus >= 201103L)
609
610#if ECB_CPP
611 #define ECB_C 0
612 #define ECB_STDC_VERSION 0
613#else
614 #define ECB_C 1
615 #define ECB_STDC_VERSION __STDC_VERSION__
616#endif
617
618#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
619#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
620
621#if ECB_CPP
622 #define ECB_EXTERN_C extern "C"
623 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
624 #define ECB_EXTERN_C_END }
625#else
626 #define ECB_EXTERN_C extern
627 #define ECB_EXTERN_C_BEG
628 #define ECB_EXTERN_C_END
629#endif
630
631/*****************************************************************************/
632
633/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
634/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
635
636#if ECB_NO_THREADS
637 #define ECB_NO_SMP 1
638#endif
639
640#if ECB_NO_SMP
641 #define ECB_MEMORY_FENCE do { } while (0)
642#endif
643
644#ifndef ECB_MEMORY_FENCE
645 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
646 #if __i386 || __i386__
647 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
648 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
649 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
650 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
651 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
652 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
653 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
654 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
655 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
656 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
657 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
658 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
659 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
660 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
662 #elif __aarch64__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
664 #elif (__sparc || __sparc__) && !__sparcv8
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
666 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
667 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
668 #elif defined __s390__ || defined __s390x__
669 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
670 #elif defined __mips__
671 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
672 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
673 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
674 #elif defined __alpha__
675 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
676 #elif defined __hppa__
677 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
678 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
679 #elif defined __ia64__
680 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
681 #elif defined __m68k__
682 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
683 #elif defined __m88k__
684 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
685 #elif defined __sh__
686 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
687 #endif
688 #endif
689#endif
690
691#ifndef ECB_MEMORY_FENCE
692 #if ECB_GCC_VERSION(4,7)
693 /* see comment below (stdatomic.h) about the C11 memory model. */
694 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
695 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
696 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
697
698 #elif ECB_CLANG_EXTENSION(c_atomic)
699 /* see comment below (stdatomic.h) about the C11 memory model. */
700 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
701 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
702 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
703
704 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
705 #define ECB_MEMORY_FENCE __sync_synchronize ()
706 #elif _MSC_VER >= 1500 /* VC++ 2008 */
707 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
708 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
709 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
710 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
711 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
712 #elif _MSC_VER >= 1400 /* VC++ 2005 */
713 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
714 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
715 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
716 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
717 #elif defined _WIN32
718 #include <WinNT.h>
719 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
720 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
721 #include <mbarrier.h>
722 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
723 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
724 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
725 #elif __xlC__
726 #define ECB_MEMORY_FENCE __sync ()
727 #endif
728#endif
729
730#ifndef ECB_MEMORY_FENCE
731 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
732 /* we assume that these memory fences work on all variables/all memory accesses, */
733 /* not just C11 atomics and atomic accesses */
734 #include <stdatomic.h>
735 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
736 /* any fence other than seq_cst, which isn't very efficient for us. */
737 /* Why that is, we don't know - either the C11 memory model is quite useless */
738 /* for most usages, or gcc and clang have a bug */
739 /* I *currently* lean towards the latter, and inefficiently implement */
740 /* all three of ecb's fences as a seq_cst fence */
741 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
742 /* for all __atomic_thread_fence's except seq_cst */
743 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
744 #endif
745#endif
746
747#ifndef ECB_MEMORY_FENCE
748 #if !ECB_AVOID_PTHREADS
749 /*
750 * if you get undefined symbol references to pthread_mutex_lock,
751 * or failure to find pthread.h, then you should implement
752 * the ECB_MEMORY_FENCE operations for your cpu/compiler
753 * OR provide pthread.h and link against the posix thread library
754 * of your system.
755 */
756 #include <pthread.h>
757 #define ECB_NEEDS_PTHREADS 1
758 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
759
760 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
761 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
762 #endif
763#endif
764
765#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
766 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
767#endif
768
769#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
770 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
771#endif
772
773/*****************************************************************************/
774
775#if ECB_CPP
776 #define ecb_inline static inline
777#elif ECB_GCC_VERSION(2,5)
778 #define ecb_inline static __inline__
779#elif ECB_C99
780 #define ecb_inline static inline
781#else
782 #define ecb_inline static
783#endif
784
785#if ECB_GCC_VERSION(3,3)
786 #define ecb_restrict __restrict__
787#elif ECB_C99
788 #define ecb_restrict restrict
789#else
790 #define ecb_restrict
791#endif
792
793typedef int ecb_bool;
794
795#define ECB_CONCAT_(a, b) a ## b
796#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
797#define ECB_STRINGIFY_(a) # a
798#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
799
800#define ecb_function_ ecb_inline
801
802#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
803 #define ecb_attribute(attrlist) __attribute__ (attrlist)
804#else
805 #define ecb_attribute(attrlist)
806#endif
807
808#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
809 #define ecb_is_constant(expr) __builtin_constant_p (expr)
810#else
811 /* possible C11 impl for integral types
812 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
813 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
814
815 #define ecb_is_constant(expr) 0
816#endif
817
818#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
819 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
820#else
821 #define ecb_expect(expr,value) (expr)
822#endif
823
824#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
825 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
826#else
827 #define ecb_prefetch(addr,rw,locality)
828#endif
829
830/* no emulation for ecb_decltype */
831#if ECB_CPP11
832 // older implementations might have problems with decltype(x)::type, work around it
833 template<class T> struct ecb_decltype_t { typedef T type; };
834 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
835#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
836 #define ecb_decltype(x) __typeof__ (x)
837#endif
838
839#if _MSC_VER >= 1300
840 #define ecb_deprecated __declspec (deprecated)
841#else
842 #define ecb_deprecated ecb_attribute ((__deprecated__))
843#endif
844
845#define ecb_noinline ecb_attribute ((__noinline__))
846#define ecb_unused ecb_attribute ((__unused__))
847#define ecb_const ecb_attribute ((__const__))
848#define ecb_pure ecb_attribute ((__pure__))
849
850/* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
851#if ECB_C11 || __IBMC_NORETURN
852 /* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */
853 #define ecb_noreturn _Noreturn
854#else
855 #define ecb_noreturn ecb_attribute ((__noreturn__))
856#endif
857
858#if ECB_GCC_VERSION(4,3)
859 #define ecb_artificial ecb_attribute ((__artificial__))
860 #define ecb_hot ecb_attribute ((__hot__))
861 #define ecb_cold ecb_attribute ((__cold__))
862#else
863 #define ecb_artificial
864 #define ecb_hot
865 #define ecb_cold
866#endif
867
868/* put around conditional expressions if you are very sure that the */
869/* expression is mostly true or mostly false. note that these return */
870/* booleans, not the expression. */
236#define expect_false(expr) expect ((expr) != 0, 0) 871#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
237#define expect_true(expr) expect ((expr) != 0, 1) 872#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
873/* for compatibility to the rest of the world */
874#define ecb_likely(expr) ecb_expect_true (expr)
875#define ecb_unlikely(expr) ecb_expect_false (expr)
876
877/* count trailing zero bits and count # of one bits */
878#if ECB_GCC_VERSION(3,4) \
879 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
880 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
881 && ECB_CLANG_BUILTIN(__builtin_popcount))
882 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
883 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
884 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
885 #define ecb_ctz32(x) __builtin_ctz (x)
886 #define ecb_ctz64(x) __builtin_ctzll (x)
887 #define ecb_popcount32(x) __builtin_popcount (x)
888 /* no popcountll */
889#else
890 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
891 ecb_function_ ecb_const int
892 ecb_ctz32 (uint32_t x)
893 {
894 int r = 0;
895
896 x &= ~x + 1; /* this isolates the lowest bit */
897
898#if ECB_branchless_on_i386
899 r += !!(x & 0xaaaaaaaa) << 0;
900 r += !!(x & 0xcccccccc) << 1;
901 r += !!(x & 0xf0f0f0f0) << 2;
902 r += !!(x & 0xff00ff00) << 3;
903 r += !!(x & 0xffff0000) << 4;
904#else
905 if (x & 0xaaaaaaaa) r += 1;
906 if (x & 0xcccccccc) r += 2;
907 if (x & 0xf0f0f0f0) r += 4;
908 if (x & 0xff00ff00) r += 8;
909 if (x & 0xffff0000) r += 16;
910#endif
911
912 return r;
913 }
914
915 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
916 ecb_function_ ecb_const int
917 ecb_ctz64 (uint64_t x)
918 {
919 int shift = x & 0xffffffffU ? 0 : 32;
920 return ecb_ctz32 (x >> shift) + shift;
921 }
922
923 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
924 ecb_function_ ecb_const int
925 ecb_popcount32 (uint32_t x)
926 {
927 x -= (x >> 1) & 0x55555555;
928 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
929 x = ((x >> 4) + x) & 0x0f0f0f0f;
930 x *= 0x01010101;
931
932 return x >> 24;
933 }
934
935 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
936 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
937 {
938 int r = 0;
939
940 if (x >> 16) { x >>= 16; r += 16; }
941 if (x >> 8) { x >>= 8; r += 8; }
942 if (x >> 4) { x >>= 4; r += 4; }
943 if (x >> 2) { x >>= 2; r += 2; }
944 if (x >> 1) { r += 1; }
945
946 return r;
947 }
948
949 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
950 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
951 {
952 int r = 0;
953
954 if (x >> 32) { x >>= 32; r += 32; }
955
956 return r + ecb_ld32 (x);
957 }
958#endif
959
960ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
961ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
962ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
963ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
964
965ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
966ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
967{
968 return ( (x * 0x0802U & 0x22110U)
969 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
970}
971
972ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
973ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
974{
975 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
976 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
977 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
978 x = ( x >> 8 ) | ( x << 8);
979
980 return x;
981}
982
983ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
984ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
985{
986 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
987 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
988 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
989 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
990 x = ( x >> 16 ) | ( x << 16);
991
992 return x;
993}
994
995/* popcount64 is only available on 64 bit cpus as gcc builtin */
996/* so for this version we are lazy */
997ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
998ecb_function_ ecb_const int
999ecb_popcount64 (uint64_t x)
1000{
1001 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1002}
1003
1004ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1005ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1006ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1007ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1008ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1009ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1010ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1011ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1012
1013ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1014ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1015ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1016ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1017ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1018ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1019ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1020ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1021
1022#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1023 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1024 #define ecb_bswap32(x) __builtin_bswap32 (x)
1025 #define ecb_bswap64(x) __builtin_bswap64 (x)
1026#else
1027 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1028 ecb_function_ ecb_const uint16_t
1029 ecb_bswap16 (uint16_t x)
1030 {
1031 return ecb_rotl16 (x, 8);
1032 }
1033
1034 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1035 ecb_function_ ecb_const uint32_t
1036 ecb_bswap32 (uint32_t x)
1037 {
1038 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1039 }
1040
1041 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1042 ecb_function_ ecb_const uint64_t
1043 ecb_bswap64 (uint64_t x)
1044 {
1045 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1046 }
1047#endif
1048
1049#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1050 #define ecb_unreachable() __builtin_unreachable ()
1051#else
1052 /* this seems to work fine, but gcc always emits a warning for it :/ */
1053 ecb_inline ecb_noreturn void ecb_unreachable (void);
1054 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1055#endif
1056
1057/* try to tell the compiler that some condition is definitely true */
1058#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1059
1060ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
1061ecb_inline ecb_const unsigned char
1062ecb_byteorder_helper (void)
1063{
1064 /* the union code still generates code under pressure in gcc, */
1065 /* but less than using pointers, and always seems to */
1066 /* successfully return a constant. */
1067 /* the reason why we have this horrible preprocessor mess */
1068 /* is to avoid it in all cases, at least on common architectures */
1069 /* or when using a recent enough gcc version (>= 4.6) */
1070#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1071 return 0x44;
1072#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1073 return 0x44;
1074#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1075 return 0x11;
1076#else
1077 union
1078 {
1079 uint32_t i;
1080 uint8_t c;
1081 } u = { 0x11223344 };
1082 return u.c;
1083#endif
1084}
1085
1086ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1087ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1088ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1089ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1090
1091#if ECB_GCC_VERSION(3,0) || ECB_C99
1092 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1093#else
1094 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1095#endif
1096
1097#if ECB_CPP
1098 template<typename T>
1099 static inline T ecb_div_rd (T val, T div)
1100 {
1101 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1102 }
1103 template<typename T>
1104 static inline T ecb_div_ru (T val, T div)
1105 {
1106 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1107 }
1108#else
1109 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1110 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1111#endif
1112
1113#if ecb_cplusplus_does_not_suck
1114 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1115 template<typename T, int N>
1116 static inline int ecb_array_length (const T (&arr)[N])
1117 {
1118 return N;
1119 }
1120#else
1121 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1122#endif
1123
1124/*******************************************************************************/
1125/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1126
1127/* basically, everything uses "ieee pure-endian" floating point numbers */
1128/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1129#if 0 \
1130 || __i386 || __i386__ \
1131 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1132 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1133 || defined __s390__ || defined __s390x__ \
1134 || defined __mips__ \
1135 || defined __alpha__ \
1136 || defined __hppa__ \
1137 || defined __ia64__ \
1138 || defined __m68k__ \
1139 || defined __m88k__ \
1140 || defined __sh__ \
1141 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1142 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1143 || defined __aarch64__
1144 #define ECB_STDFP 1
1145 #include <string.h> /* for memcpy */
1146#else
1147 #define ECB_STDFP 0
1148#endif
1149
1150#ifndef ECB_NO_LIBM
1151
1152 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1153
1154 /* only the oldest of old doesn't have this one. solaris. */
1155 #ifdef INFINITY
1156 #define ECB_INFINITY INFINITY
1157 #else
1158 #define ECB_INFINITY HUGE_VAL
1159 #endif
1160
1161 #ifdef NAN
1162 #define ECB_NAN NAN
1163 #else
1164 #define ECB_NAN ECB_INFINITY
1165 #endif
1166
1167 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1168 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1169 #else
1170 #define ecb_ldexpf(x,e) (float) ldexp ((x), (e))
1171 #endif
1172
1173 /* converts an ieee half/binary16 to a float */
1174 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1175 ecb_function_ ecb_const float
1176 ecb_binary16_to_float (uint16_t x)
1177 {
1178 int e = (x >> 10) & 0x1f;
1179 int m = x & 0x3ff;
1180 float r;
1181
1182 if (!e ) r = ecb_ldexpf (m , -24);
1183 else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
1184 else if (m ) r = ECB_NAN;
1185 else r = ECB_INFINITY;
1186
1187 return x & 0x8000 ? -r : r;
1188 }
1189
1190 /* convert a float to ieee single/binary32 */
1191 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1192 ecb_function_ ecb_const uint32_t
1193 ecb_float_to_binary32 (float x)
1194 {
1195 uint32_t r;
1196
1197 #if ECB_STDFP
1198 memcpy (&r, &x, 4);
1199 #else
1200 /* slow emulation, works for anything but -0 */
1201 uint32_t m;
1202 int e;
1203
1204 if (x == 0e0f ) return 0x00000000U;
1205 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1206 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1207 if (x != x ) return 0x7fbfffffU;
1208
1209 m = frexpf (x, &e) * 0x1000000U;
1210
1211 r = m & 0x80000000U;
1212
1213 if (r)
1214 m = -m;
1215
1216 if (e <= -126)
1217 {
1218 m &= 0xffffffU;
1219 m >>= (-125 - e);
1220 e = -126;
1221 }
1222
1223 r |= (e + 126) << 23;
1224 r |= m & 0x7fffffU;
1225 #endif
1226
1227 return r;
1228 }
1229
1230 /* converts an ieee single/binary32 to a float */
1231 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1232 ecb_function_ ecb_const float
1233 ecb_binary32_to_float (uint32_t x)
1234 {
1235 float r;
1236
1237 #if ECB_STDFP
1238 memcpy (&r, &x, 4);
1239 #else
1240 /* emulation, only works for normals and subnormals and +0 */
1241 int neg = x >> 31;
1242 int e = (x >> 23) & 0xffU;
1243
1244 x &= 0x7fffffU;
1245
1246 if (e)
1247 x |= 0x800000U;
1248 else
1249 e = 1;
1250
1251 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1252 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1253
1254 r = neg ? -r : r;
1255 #endif
1256
1257 return r;
1258 }
1259
1260 /* convert a double to ieee double/binary64 */
1261 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1262 ecb_function_ ecb_const uint64_t
1263 ecb_double_to_binary64 (double x)
1264 {
1265 uint64_t r;
1266
1267 #if ECB_STDFP
1268 memcpy (&r, &x, 8);
1269 #else
1270 /* slow emulation, works for anything but -0 */
1271 uint64_t m;
1272 int e;
1273
1274 if (x == 0e0 ) return 0x0000000000000000U;
1275 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1276 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1277 if (x != x ) return 0X7ff7ffffffffffffU;
1278
1279 m = frexp (x, &e) * 0x20000000000000U;
1280
1281 r = m & 0x8000000000000000;;
1282
1283 if (r)
1284 m = -m;
1285
1286 if (e <= -1022)
1287 {
1288 m &= 0x1fffffffffffffU;
1289 m >>= (-1021 - e);
1290 e = -1022;
1291 }
1292
1293 r |= ((uint64_t)(e + 1022)) << 52;
1294 r |= m & 0xfffffffffffffU;
1295 #endif
1296
1297 return r;
1298 }
1299
1300 /* converts an ieee double/binary64 to a double */
1301 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1302 ecb_function_ ecb_const double
1303 ecb_binary64_to_double (uint64_t x)
1304 {
1305 double r;
1306
1307 #if ECB_STDFP
1308 memcpy (&r, &x, 8);
1309 #else
1310 /* emulation, only works for normals and subnormals and +0 */
1311 int neg = x >> 63;
1312 int e = (x >> 52) & 0x7ffU;
1313
1314 x &= 0xfffffffffffffU;
1315
1316 if (e)
1317 x |= 0x10000000000000U;
1318 else
1319 e = 1;
1320
1321 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1322 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1323
1324 r = neg ? -r : r;
1325 #endif
1326
1327 return r;
1328 }
1329
1330#endif
1331
1332#endif
1333
1334/* ECB.H END */
1335
1336#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1337/* if your architecture doesn't need memory fences, e.g. because it is
1338 * single-cpu/core, or if you use libev in a project that doesn't use libev
1339 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1340 * libev, in which cases the memory fences become nops.
1341 * alternatively, you can remove this #error and link against libpthread,
1342 * which will then provide the memory fences.
1343 */
1344# error "memory fences not defined for your architecture, please report"
1345#endif
1346
1347#ifndef ECB_MEMORY_FENCE
1348# define ECB_MEMORY_FENCE do { } while (0)
1349# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1350# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1351#endif
1352
1353#define expect_false(cond) ecb_expect_false (cond)
1354#define expect_true(cond) ecb_expect_true (cond)
1355#define noinline ecb_noinline
1356
238#define inline_size static inline 1357#define inline_size ecb_inline
239 1358
240#if EV_MINIMAL 1359#if EV_FEATURE_CODE
1360# define inline_speed ecb_inline
1361#else
241# define inline_speed static noinline 1362# define inline_speed static noinline
1363#endif
1364
1365#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1366
1367#if EV_MINPRI == EV_MAXPRI
1368# define ABSPRI(w) (((W)w), 0)
242#else 1369#else
243# define inline_speed static inline
244#endif
245
246#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
247#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1370# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1371#endif
248 1372
249#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1373#define EMPTY /* required for microsofts broken pseudo-c compiler */
250#define EMPTY2(a,b) /* used to suppress some warnings */ 1374#define EMPTY2(a,b) /* used to suppress some warnings */
251 1375
252typedef ev_watcher *W; 1376typedef ev_watcher *W;
253typedef ev_watcher_list *WL; 1377typedef ev_watcher_list *WL;
254typedef ev_watcher_time *WT; 1378typedef ev_watcher_time *WT;
255 1379
1380#define ev_active(w) ((W)(w))->active
1381#define ev_at(w) ((WT)(w))->at
1382
1383#if EV_USE_REALTIME
1384/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1385/* giving it a reasonably high chance of working on typical architectures */
1386static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1387#endif
1388
1389#if EV_USE_MONOTONIC
256static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1390static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1391#endif
1392
1393#ifndef EV_FD_TO_WIN32_HANDLE
1394# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1395#endif
1396#ifndef EV_WIN32_HANDLE_TO_FD
1397# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1398#endif
1399#ifndef EV_WIN32_CLOSE_FD
1400# define EV_WIN32_CLOSE_FD(fd) close (fd)
1401#endif
257 1402
258#ifdef _WIN32 1403#ifdef _WIN32
259# include "ev_win32.c" 1404# include "ev_win32.c"
260#endif 1405#endif
261 1406
262/*****************************************************************************/ 1407/*****************************************************************************/
263 1408
1409/* define a suitable floor function (only used by periodics atm) */
1410
1411#if EV_USE_FLOOR
1412# include <math.h>
1413# define ev_floor(v) floor (v)
1414#else
1415
1416#include <float.h>
1417
1418/* a floor() replacement function, should be independent of ev_tstamp type */
1419static ev_tstamp noinline
1420ev_floor (ev_tstamp v)
1421{
1422 /* the choice of shift factor is not terribly important */
1423#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1424 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1425#else
1426 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1427#endif
1428
1429 /* argument too large for an unsigned long? */
1430 if (expect_false (v >= shift))
1431 {
1432 ev_tstamp f;
1433
1434 if (v == v - 1.)
1435 return v; /* very large number */
1436
1437 f = shift * ev_floor (v * (1. / shift));
1438 return f + ev_floor (v - f);
1439 }
1440
1441 /* special treatment for negative args? */
1442 if (expect_false (v < 0.))
1443 {
1444 ev_tstamp f = -ev_floor (-v);
1445
1446 return f - (f == v ? 0 : 1);
1447 }
1448
1449 /* fits into an unsigned long */
1450 return (unsigned long)v;
1451}
1452
1453#endif
1454
1455/*****************************************************************************/
1456
1457#ifdef __linux
1458# include <sys/utsname.h>
1459#endif
1460
1461static unsigned int noinline ecb_cold
1462ev_linux_version (void)
1463{
1464#ifdef __linux
1465 unsigned int v = 0;
1466 struct utsname buf;
1467 int i;
1468 char *p = buf.release;
1469
1470 if (uname (&buf))
1471 return 0;
1472
1473 for (i = 3+1; --i; )
1474 {
1475 unsigned int c = 0;
1476
1477 for (;;)
1478 {
1479 if (*p >= '0' && *p <= '9')
1480 c = c * 10 + *p++ - '0';
1481 else
1482 {
1483 p += *p == '.';
1484 break;
1485 }
1486 }
1487
1488 v = (v << 8) | c;
1489 }
1490
1491 return v;
1492#else
1493 return 0;
1494#endif
1495}
1496
1497/*****************************************************************************/
1498
1499#if EV_AVOID_STDIO
1500static void noinline ecb_cold
1501ev_printerr (const char *msg)
1502{
1503 write (STDERR_FILENO, msg, strlen (msg));
1504}
1505#endif
1506
264static void (*syserr_cb)(const char *msg); 1507static void (*syserr_cb)(const char *msg) EV_THROW;
265 1508
266void 1509void ecb_cold
267ev_set_syserr_cb (void (*cb)(const char *msg)) 1510ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
268{ 1511{
269 syserr_cb = cb; 1512 syserr_cb = cb;
270} 1513}
271 1514
272static void noinline 1515static void noinline ecb_cold
273syserr (const char *msg) 1516ev_syserr (const char *msg)
274{ 1517{
275 if (!msg) 1518 if (!msg)
276 msg = "(libev) system error"; 1519 msg = "(libev) system error";
277 1520
278 if (syserr_cb) 1521 if (syserr_cb)
279 syserr_cb (msg); 1522 syserr_cb (msg);
280 else 1523 else
281 { 1524 {
1525#if EV_AVOID_STDIO
1526 ev_printerr (msg);
1527 ev_printerr (": ");
1528 ev_printerr (strerror (errno));
1529 ev_printerr ("\n");
1530#else
282 perror (msg); 1531 perror (msg);
1532#endif
283 abort (); 1533 abort ();
284 } 1534 }
285} 1535}
286 1536
1537static void *
1538ev_realloc_emul (void *ptr, long size) EV_THROW
1539{
1540 /* some systems, notably openbsd and darwin, fail to properly
1541 * implement realloc (x, 0) (as required by both ansi c-89 and
1542 * the single unix specification, so work around them here.
1543 * recently, also (at least) fedora and debian started breaking it,
1544 * despite documenting it otherwise.
1545 */
1546
1547 if (size)
1548 return realloc (ptr, size);
1549
1550 free (ptr);
1551 return 0;
1552}
1553
287static void *(*alloc)(void *ptr, long size); 1554static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
288 1555
289void 1556void ecb_cold
290ev_set_allocator (void *(*cb)(void *ptr, long size)) 1557ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
291{ 1558{
292 alloc = cb; 1559 alloc = cb;
293} 1560}
294 1561
295inline_speed void * 1562inline_speed void *
296ev_realloc (void *ptr, long size) 1563ev_realloc (void *ptr, long size)
297{ 1564{
298 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1565 ptr = alloc (ptr, size);
299 1566
300 if (!ptr && size) 1567 if (!ptr && size)
301 { 1568 {
1569#if EV_AVOID_STDIO
1570 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1571#else
302 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1572 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1573#endif
303 abort (); 1574 abort ();
304 } 1575 }
305 1576
306 return ptr; 1577 return ptr;
307} 1578}
… …
309#define ev_malloc(size) ev_realloc (0, (size)) 1580#define ev_malloc(size) ev_realloc (0, (size))
310#define ev_free(ptr) ev_realloc ((ptr), 0) 1581#define ev_free(ptr) ev_realloc ((ptr), 0)
311 1582
312/*****************************************************************************/ 1583/*****************************************************************************/
313 1584
1585/* set in reify when reification needed */
1586#define EV_ANFD_REIFY 1
1587
1588/* file descriptor info structure */
314typedef struct 1589typedef struct
315{ 1590{
316 WL head; 1591 WL head;
317 unsigned char events; 1592 unsigned char events; /* the events watched for */
1593 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1594 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
318 unsigned char reify; 1595 unsigned char unused;
1596#if EV_USE_EPOLL
1597 unsigned int egen; /* generation counter to counter epoll bugs */
1598#endif
319#if EV_SELECT_IS_WINSOCKET 1599#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
320 SOCKET handle; 1600 SOCKET handle;
321#endif 1601#endif
1602#if EV_USE_IOCP
1603 OVERLAPPED or, ow;
1604#endif
322} ANFD; 1605} ANFD;
323 1606
1607/* stores the pending event set for a given watcher */
324typedef struct 1608typedef struct
325{ 1609{
326 W w; 1610 W w;
327 int events; 1611 int events; /* the pending event set for the given watcher */
328} ANPENDING; 1612} ANPENDING;
329 1613
330#if EV_USE_INOTIFY 1614#if EV_USE_INOTIFY
1615/* hash table entry per inotify-id */
331typedef struct 1616typedef struct
332{ 1617{
333 WL head; 1618 WL head;
334} ANFS; 1619} ANFS;
1620#endif
1621
1622/* Heap Entry */
1623#if EV_HEAP_CACHE_AT
1624 /* a heap element */
1625 typedef struct {
1626 ev_tstamp at;
1627 WT w;
1628 } ANHE;
1629
1630 #define ANHE_w(he) (he).w /* access watcher, read-write */
1631 #define ANHE_at(he) (he).at /* access cached at, read-only */
1632 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1633#else
1634 /* a heap element */
1635 typedef WT ANHE;
1636
1637 #define ANHE_w(he) (he)
1638 #define ANHE_at(he) (he)->at
1639 #define ANHE_at_cache(he)
335#endif 1640#endif
336 1641
337#if EV_MULTIPLICITY 1642#if EV_MULTIPLICITY
338 1643
339 struct ev_loop 1644 struct ev_loop
… …
345 #undef VAR 1650 #undef VAR
346 }; 1651 };
347 #include "ev_wrap.h" 1652 #include "ev_wrap.h"
348 1653
349 static struct ev_loop default_loop_struct; 1654 static struct ev_loop default_loop_struct;
350 struct ev_loop *ev_default_loop_ptr; 1655 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
351 1656
352#else 1657#else
353 1658
354 ev_tstamp ev_rt_now; 1659 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
355 #define VAR(name,decl) static decl; 1660 #define VAR(name,decl) static decl;
356 #include "ev_vars.h" 1661 #include "ev_vars.h"
357 #undef VAR 1662 #undef VAR
358 1663
359 static int ev_default_loop_ptr; 1664 static int ev_default_loop_ptr;
360 1665
361#endif 1666#endif
362 1667
1668#if EV_FEATURE_API
1669# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1670# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1671# define EV_INVOKE_PENDING invoke_cb (EV_A)
1672#else
1673# define EV_RELEASE_CB (void)0
1674# define EV_ACQUIRE_CB (void)0
1675# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1676#endif
1677
1678#define EVBREAK_RECURSE 0x80
1679
363/*****************************************************************************/ 1680/*****************************************************************************/
364 1681
1682#ifndef EV_HAVE_EV_TIME
365ev_tstamp 1683ev_tstamp
366ev_time (void) 1684ev_time (void) EV_THROW
367{ 1685{
368#if EV_USE_REALTIME 1686#if EV_USE_REALTIME
1687 if (expect_true (have_realtime))
1688 {
369 struct timespec ts; 1689 struct timespec ts;
370 clock_gettime (CLOCK_REALTIME, &ts); 1690 clock_gettime (CLOCK_REALTIME, &ts);
371 return ts.tv_sec + ts.tv_nsec * 1e-9; 1691 return ts.tv_sec + ts.tv_nsec * 1e-9;
372#else 1692 }
1693#endif
1694
373 struct timeval tv; 1695 struct timeval tv;
374 gettimeofday (&tv, 0); 1696 gettimeofday (&tv, 0);
375 return tv.tv_sec + tv.tv_usec * 1e-6; 1697 return tv.tv_sec + tv.tv_usec * 1e-6;
376#endif
377} 1698}
1699#endif
378 1700
379ev_tstamp inline_size 1701inline_size ev_tstamp
380get_clock (void) 1702get_clock (void)
381{ 1703{
382#if EV_USE_MONOTONIC 1704#if EV_USE_MONOTONIC
383 if (expect_true (have_monotonic)) 1705 if (expect_true (have_monotonic))
384 { 1706 {
… …
391 return ev_time (); 1713 return ev_time ();
392} 1714}
393 1715
394#if EV_MULTIPLICITY 1716#if EV_MULTIPLICITY
395ev_tstamp 1717ev_tstamp
396ev_now (EV_P) 1718ev_now (EV_P) EV_THROW
397{ 1719{
398 return ev_rt_now; 1720 return ev_rt_now;
399} 1721}
400#endif 1722#endif
401 1723
402int inline_size 1724void
1725ev_sleep (ev_tstamp delay) EV_THROW
1726{
1727 if (delay > 0.)
1728 {
1729#if EV_USE_NANOSLEEP
1730 struct timespec ts;
1731
1732 EV_TS_SET (ts, delay);
1733 nanosleep (&ts, 0);
1734#elif defined _WIN32
1735 Sleep ((unsigned long)(delay * 1e3));
1736#else
1737 struct timeval tv;
1738
1739 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1740 /* something not guaranteed by newer posix versions, but guaranteed */
1741 /* by older ones */
1742 EV_TV_SET (tv, delay);
1743 select (0, 0, 0, 0, &tv);
1744#endif
1745 }
1746}
1747
1748/*****************************************************************************/
1749
1750#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1751
1752/* find a suitable new size for the given array, */
1753/* hopefully by rounding to a nice-to-malloc size */
1754inline_size int
403array_nextsize (int elem, int cur, int cnt) 1755array_nextsize (int elem, int cur, int cnt)
404{ 1756{
405 int ncur = cur + 1; 1757 int ncur = cur + 1;
406 1758
407 do 1759 do
408 ncur <<= 1; 1760 ncur <<= 1;
409 while (cnt > ncur); 1761 while (cnt > ncur);
410 1762
411 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1763 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
412 if (elem * ncur > 4096) 1764 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
413 { 1765 {
414 ncur *= elem; 1766 ncur *= elem;
415 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1767 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
416 ncur = ncur - sizeof (void *) * 4; 1768 ncur = ncur - sizeof (void *) * 4;
417 ncur /= elem; 1769 ncur /= elem;
418 } 1770 }
419 1771
420 return ncur; 1772 return ncur;
421} 1773}
422 1774
423static noinline void * 1775static void * noinline ecb_cold
424array_realloc (int elem, void *base, int *cur, int cnt) 1776array_realloc (int elem, void *base, int *cur, int cnt)
425{ 1777{
426 *cur = array_nextsize (elem, *cur, cnt); 1778 *cur = array_nextsize (elem, *cur, cnt);
427 return ev_realloc (base, elem * *cur); 1779 return ev_realloc (base, elem * *cur);
428} 1780}
1781
1782#define array_init_zero(base,count) \
1783 memset ((void *)(base), 0, sizeof (*(base)) * (count))
429 1784
430#define array_needsize(type,base,cur,cnt,init) \ 1785#define array_needsize(type,base,cur,cnt,init) \
431 if (expect_false ((cnt) > (cur))) \ 1786 if (expect_false ((cnt) > (cur))) \
432 { \ 1787 { \
433 int ocur_ = (cur); \ 1788 int ecb_unused ocur_ = (cur); \
434 (base) = (type *)array_realloc \ 1789 (base) = (type *)array_realloc \
435 (sizeof (type), (base), &(cur), (cnt)); \ 1790 (sizeof (type), (base), &(cur), (cnt)); \
436 init ((base) + (ocur_), (cur) - ocur_); \ 1791 init ((base) + (ocur_), (cur) - ocur_); \
437 } 1792 }
438 1793
… …
445 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1800 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
446 } 1801 }
447#endif 1802#endif
448 1803
449#define array_free(stem, idx) \ 1804#define array_free(stem, idx) \
450 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1805 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
451 1806
452/*****************************************************************************/ 1807/*****************************************************************************/
453 1808
1809/* dummy callback for pending events */
1810static void noinline
1811pendingcb (EV_P_ ev_prepare *w, int revents)
1812{
1813}
1814
454void noinline 1815void noinline
455ev_feed_event (EV_P_ void *w, int revents) 1816ev_feed_event (EV_P_ void *w, int revents) EV_THROW
456{ 1817{
457 W w_ = (W)w; 1818 W w_ = (W)w;
458 int pri = ABSPRI (w_); 1819 int pri = ABSPRI (w_);
459 1820
460 if (expect_false (w_->pending)) 1821 if (expect_false (w_->pending))
… …
464 w_->pending = ++pendingcnt [pri]; 1825 w_->pending = ++pendingcnt [pri];
465 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1826 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
466 pendings [pri][w_->pending - 1].w = w_; 1827 pendings [pri][w_->pending - 1].w = w_;
467 pendings [pri][w_->pending - 1].events = revents; 1828 pendings [pri][w_->pending - 1].events = revents;
468 } 1829 }
469}
470 1830
471void inline_size 1831 pendingpri = NUMPRI - 1;
1832}
1833
1834inline_speed void
1835feed_reverse (EV_P_ W w)
1836{
1837 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1838 rfeeds [rfeedcnt++] = w;
1839}
1840
1841inline_size void
1842feed_reverse_done (EV_P_ int revents)
1843{
1844 do
1845 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1846 while (rfeedcnt);
1847}
1848
1849inline_speed void
472queue_events (EV_P_ W *events, int eventcnt, int type) 1850queue_events (EV_P_ W *events, int eventcnt, int type)
473{ 1851{
474 int i; 1852 int i;
475 1853
476 for (i = 0; i < eventcnt; ++i) 1854 for (i = 0; i < eventcnt; ++i)
477 ev_feed_event (EV_A_ events [i], type); 1855 ev_feed_event (EV_A_ events [i], type);
478} 1856}
479 1857
480/*****************************************************************************/ 1858/*****************************************************************************/
481 1859
482void inline_size 1860inline_speed void
483anfds_init (ANFD *base, int count)
484{
485 while (count--)
486 {
487 base->head = 0;
488 base->events = EV_NONE;
489 base->reify = 0;
490
491 ++base;
492 }
493}
494
495void inline_speed
496fd_event (EV_P_ int fd, int revents) 1861fd_event_nocheck (EV_P_ int fd, int revents)
497{ 1862{
498 ANFD *anfd = anfds + fd; 1863 ANFD *anfd = anfds + fd;
499 ev_io *w; 1864 ev_io *w;
500 1865
501 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1866 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
505 if (ev) 1870 if (ev)
506 ev_feed_event (EV_A_ (W)w, ev); 1871 ev_feed_event (EV_A_ (W)w, ev);
507 } 1872 }
508} 1873}
509 1874
1875/* do not submit kernel events for fds that have reify set */
1876/* because that means they changed while we were polling for new events */
1877inline_speed void
1878fd_event (EV_P_ int fd, int revents)
1879{
1880 ANFD *anfd = anfds + fd;
1881
1882 if (expect_true (!anfd->reify))
1883 fd_event_nocheck (EV_A_ fd, revents);
1884}
1885
510void 1886void
511ev_feed_fd_event (EV_P_ int fd, int revents) 1887ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
512{ 1888{
513 if (fd >= 0 && fd < anfdmax) 1889 if (fd >= 0 && fd < anfdmax)
514 fd_event (EV_A_ fd, revents); 1890 fd_event_nocheck (EV_A_ fd, revents);
515} 1891}
516 1892
517void inline_size 1893/* make sure the external fd watch events are in-sync */
1894/* with the kernel/libev internal state */
1895inline_size void
518fd_reify (EV_P) 1896fd_reify (EV_P)
519{ 1897{
520 int i; 1898 int i;
1899
1900#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1901 for (i = 0; i < fdchangecnt; ++i)
1902 {
1903 int fd = fdchanges [i];
1904 ANFD *anfd = anfds + fd;
1905
1906 if (anfd->reify & EV__IOFDSET && anfd->head)
1907 {
1908 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1909
1910 if (handle != anfd->handle)
1911 {
1912 unsigned long arg;
1913
1914 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1915
1916 /* handle changed, but fd didn't - we need to do it in two steps */
1917 backend_modify (EV_A_ fd, anfd->events, 0);
1918 anfd->events = 0;
1919 anfd->handle = handle;
1920 }
1921 }
1922 }
1923#endif
521 1924
522 for (i = 0; i < fdchangecnt; ++i) 1925 for (i = 0; i < fdchangecnt; ++i)
523 { 1926 {
524 int fd = fdchanges [i]; 1927 int fd = fdchanges [i];
525 ANFD *anfd = anfds + fd; 1928 ANFD *anfd = anfds + fd;
526 ev_io *w; 1929 ev_io *w;
527 1930
528 int events = 0; 1931 unsigned char o_events = anfd->events;
1932 unsigned char o_reify = anfd->reify;
529 1933
530 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1934 anfd->reify = 0;
531 events |= w->events;
532 1935
533#if EV_SELECT_IS_WINSOCKET 1936 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
534 if (events)
535 { 1937 {
536 unsigned long argp; 1938 anfd->events = 0;
537 anfd->handle = _get_osfhandle (fd); 1939
538 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1940 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1941 anfd->events |= (unsigned char)w->events;
1942
1943 if (o_events != anfd->events)
1944 o_reify = EV__IOFDSET; /* actually |= */
539 } 1945 }
540#endif
541 1946
542 anfd->reify = 0; 1947 if (o_reify & EV__IOFDSET)
543
544 backend_modify (EV_A_ fd, anfd->events, events); 1948 backend_modify (EV_A_ fd, o_events, anfd->events);
545 anfd->events = events;
546 } 1949 }
547 1950
548 fdchangecnt = 0; 1951 fdchangecnt = 0;
549} 1952}
550 1953
551void inline_size 1954/* something about the given fd changed */
1955inline_size void
552fd_change (EV_P_ int fd) 1956fd_change (EV_P_ int fd, int flags)
553{ 1957{
554 if (expect_false (anfds [fd].reify)) 1958 unsigned char reify = anfds [fd].reify;
555 return;
556
557 anfds [fd].reify = 1; 1959 anfds [fd].reify |= flags;
558 1960
1961 if (expect_true (!reify))
1962 {
559 ++fdchangecnt; 1963 ++fdchangecnt;
560 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1964 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
561 fdchanges [fdchangecnt - 1] = fd; 1965 fdchanges [fdchangecnt - 1] = fd;
1966 }
562} 1967}
563 1968
564void inline_speed 1969/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1970inline_speed void ecb_cold
565fd_kill (EV_P_ int fd) 1971fd_kill (EV_P_ int fd)
566{ 1972{
567 ev_io *w; 1973 ev_io *w;
568 1974
569 while ((w = (ev_io *)anfds [fd].head)) 1975 while ((w = (ev_io *)anfds [fd].head))
… …
571 ev_io_stop (EV_A_ w); 1977 ev_io_stop (EV_A_ w);
572 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1978 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
573 } 1979 }
574} 1980}
575 1981
576int inline_size 1982/* check whether the given fd is actually valid, for error recovery */
1983inline_size int ecb_cold
577fd_valid (int fd) 1984fd_valid (int fd)
578{ 1985{
579#ifdef _WIN32 1986#ifdef _WIN32
580 return _get_osfhandle (fd) != -1; 1987 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
581#else 1988#else
582 return fcntl (fd, F_GETFD) != -1; 1989 return fcntl (fd, F_GETFD) != -1;
583#endif 1990#endif
584} 1991}
585 1992
586/* called on EBADF to verify fds */ 1993/* called on EBADF to verify fds */
587static void noinline 1994static void noinline ecb_cold
588fd_ebadf (EV_P) 1995fd_ebadf (EV_P)
589{ 1996{
590 int fd; 1997 int fd;
591 1998
592 for (fd = 0; fd < anfdmax; ++fd) 1999 for (fd = 0; fd < anfdmax; ++fd)
593 if (anfds [fd].events) 2000 if (anfds [fd].events)
594 if (!fd_valid (fd) == -1 && errno == EBADF) 2001 if (!fd_valid (fd) && errno == EBADF)
595 fd_kill (EV_A_ fd); 2002 fd_kill (EV_A_ fd);
596} 2003}
597 2004
598/* called on ENOMEM in select/poll to kill some fds and retry */ 2005/* called on ENOMEM in select/poll to kill some fds and retry */
599static void noinline 2006static void noinline ecb_cold
600fd_enomem (EV_P) 2007fd_enomem (EV_P)
601{ 2008{
602 int fd; 2009 int fd;
603 2010
604 for (fd = anfdmax; fd--; ) 2011 for (fd = anfdmax; fd--; )
605 if (anfds [fd].events) 2012 if (anfds [fd].events)
606 { 2013 {
607 fd_kill (EV_A_ fd); 2014 fd_kill (EV_A_ fd);
608 return; 2015 break;
609 } 2016 }
610} 2017}
611 2018
612/* usually called after fork if backend needs to re-arm all fds from scratch */ 2019/* usually called after fork if backend needs to re-arm all fds from scratch */
613static void noinline 2020static void noinline
… …
617 2024
618 for (fd = 0; fd < anfdmax; ++fd) 2025 for (fd = 0; fd < anfdmax; ++fd)
619 if (anfds [fd].events) 2026 if (anfds [fd].events)
620 { 2027 {
621 anfds [fd].events = 0; 2028 anfds [fd].events = 0;
622 fd_change (EV_A_ fd); 2029 anfds [fd].emask = 0;
2030 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
623 } 2031 }
624} 2032}
625 2033
626/*****************************************************************************/ 2034/* used to prepare libev internal fd's */
627 2035/* this is not fork-safe */
628void inline_speed 2036inline_speed void
629upheap (WT *heap, int k)
630{
631 WT w = heap [k];
632
633 while (k && heap [k >> 1]->at > w->at)
634 {
635 heap [k] = heap [k >> 1];
636 ((W)heap [k])->active = k + 1;
637 k >>= 1;
638 }
639
640 heap [k] = w;
641 ((W)heap [k])->active = k + 1;
642
643}
644
645void inline_speed
646downheap (WT *heap, int N, int k)
647{
648 WT w = heap [k];
649
650 while (k < (N >> 1))
651 {
652 int j = k << 1;
653
654 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
655 ++j;
656
657 if (w->at <= heap [j]->at)
658 break;
659
660 heap [k] = heap [j];
661 ((W)heap [k])->active = k + 1;
662 k = j;
663 }
664
665 heap [k] = w;
666 ((W)heap [k])->active = k + 1;
667}
668
669void inline_size
670adjustheap (WT *heap, int N, int k)
671{
672 upheap (heap, k);
673 downheap (heap, N, k);
674}
675
676/*****************************************************************************/
677
678typedef struct
679{
680 WL head;
681 sig_atomic_t volatile gotsig;
682} ANSIG;
683
684static ANSIG *signals;
685static int signalmax;
686
687static int sigpipe [2];
688static sig_atomic_t volatile gotsig;
689static ev_io sigev;
690
691void inline_size
692signals_init (ANSIG *base, int count)
693{
694 while (count--)
695 {
696 base->head = 0;
697 base->gotsig = 0;
698
699 ++base;
700 }
701}
702
703static void
704sighandler (int signum)
705{
706#if _WIN32
707 signal (signum, sighandler);
708#endif
709
710 signals [signum - 1].gotsig = 1;
711
712 if (!gotsig)
713 {
714 int old_errno = errno;
715 gotsig = 1;
716 write (sigpipe [1], &signum, 1);
717 errno = old_errno;
718 }
719}
720
721void noinline
722ev_feed_signal_event (EV_P_ int signum)
723{
724 WL w;
725
726#if EV_MULTIPLICITY
727 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
728#endif
729
730 --signum;
731
732 if (signum < 0 || signum >= signalmax)
733 return;
734
735 signals [signum].gotsig = 0;
736
737 for (w = signals [signum].head; w; w = w->next)
738 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
739}
740
741static void
742sigcb (EV_P_ ev_io *iow, int revents)
743{
744 int signum;
745
746 read (sigpipe [0], &revents, 1);
747 gotsig = 0;
748
749 for (signum = signalmax; signum--; )
750 if (signals [signum].gotsig)
751 ev_feed_signal_event (EV_A_ signum + 1);
752}
753
754void inline_speed
755fd_intern (int fd) 2037fd_intern (int fd)
756{ 2038{
757#ifdef _WIN32 2039#ifdef _WIN32
758 int arg = 1; 2040 unsigned long arg = 1;
759 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 2041 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
760#else 2042#else
761 fcntl (fd, F_SETFD, FD_CLOEXEC); 2043 fcntl (fd, F_SETFD, FD_CLOEXEC);
762 fcntl (fd, F_SETFL, O_NONBLOCK); 2044 fcntl (fd, F_SETFL, O_NONBLOCK);
763#endif 2045#endif
764} 2046}
765 2047
766static void noinline
767siginit (EV_P)
768{
769 fd_intern (sigpipe [0]);
770 fd_intern (sigpipe [1]);
771
772 ev_io_set (&sigev, sigpipe [0], EV_READ);
773 ev_io_start (EV_A_ &sigev);
774 ev_unref (EV_A); /* child watcher should not keep loop alive */
775}
776
777/*****************************************************************************/ 2048/*****************************************************************************/
778 2049
779static ev_child *childs [EV_PID_HASHSIZE]; 2050/*
2051 * the heap functions want a real array index. array index 0 is guaranteed to not
2052 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2053 * the branching factor of the d-tree.
2054 */
780 2055
2056/*
2057 * at the moment we allow libev the luxury of two heaps,
2058 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2059 * which is more cache-efficient.
2060 * the difference is about 5% with 50000+ watchers.
2061 */
2062#if EV_USE_4HEAP
2063
2064#define DHEAP 4
2065#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2066#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2067#define UPHEAP_DONE(p,k) ((p) == (k))
2068
2069/* away from the root */
2070inline_speed void
2071downheap (ANHE *heap, int N, int k)
2072{
2073 ANHE he = heap [k];
2074 ANHE *E = heap + N + HEAP0;
2075
2076 for (;;)
2077 {
2078 ev_tstamp minat;
2079 ANHE *minpos;
2080 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2081
2082 /* find minimum child */
2083 if (expect_true (pos + DHEAP - 1 < E))
2084 {
2085 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2086 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2087 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2088 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2089 }
2090 else if (pos < E)
2091 {
2092 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2093 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2094 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2095 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2096 }
2097 else
2098 break;
2099
2100 if (ANHE_at (he) <= minat)
2101 break;
2102
2103 heap [k] = *minpos;
2104 ev_active (ANHE_w (*minpos)) = k;
2105
2106 k = minpos - heap;
2107 }
2108
2109 heap [k] = he;
2110 ev_active (ANHE_w (he)) = k;
2111}
2112
2113#else /* 4HEAP */
2114
2115#define HEAP0 1
2116#define HPARENT(k) ((k) >> 1)
2117#define UPHEAP_DONE(p,k) (!(p))
2118
2119/* away from the root */
2120inline_speed void
2121downheap (ANHE *heap, int N, int k)
2122{
2123 ANHE he = heap [k];
2124
2125 for (;;)
2126 {
2127 int c = k << 1;
2128
2129 if (c >= N + HEAP0)
2130 break;
2131
2132 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2133 ? 1 : 0;
2134
2135 if (ANHE_at (he) <= ANHE_at (heap [c]))
2136 break;
2137
2138 heap [k] = heap [c];
2139 ev_active (ANHE_w (heap [k])) = k;
2140
2141 k = c;
2142 }
2143
2144 heap [k] = he;
2145 ev_active (ANHE_w (he)) = k;
2146}
2147#endif
2148
2149/* towards the root */
2150inline_speed void
2151upheap (ANHE *heap, int k)
2152{
2153 ANHE he = heap [k];
2154
2155 for (;;)
2156 {
2157 int p = HPARENT (k);
2158
2159 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2160 break;
2161
2162 heap [k] = heap [p];
2163 ev_active (ANHE_w (heap [k])) = k;
2164 k = p;
2165 }
2166
2167 heap [k] = he;
2168 ev_active (ANHE_w (he)) = k;
2169}
2170
2171/* move an element suitably so it is in a correct place */
2172inline_size void
2173adjustheap (ANHE *heap, int N, int k)
2174{
2175 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2176 upheap (heap, k);
2177 else
2178 downheap (heap, N, k);
2179}
2180
2181/* rebuild the heap: this function is used only once and executed rarely */
2182inline_size void
2183reheap (ANHE *heap, int N)
2184{
2185 int i;
2186
2187 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2188 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2189 for (i = 0; i < N; ++i)
2190 upheap (heap, i + HEAP0);
2191}
2192
2193/*****************************************************************************/
2194
2195/* associate signal watchers to a signal signal */
2196typedef struct
2197{
2198 EV_ATOMIC_T pending;
2199#if EV_MULTIPLICITY
2200 EV_P;
2201#endif
2202 WL head;
2203} ANSIG;
2204
2205static ANSIG signals [EV_NSIG - 1];
2206
2207/*****************************************************************************/
2208
2209#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2210
2211static void noinline ecb_cold
2212evpipe_init (EV_P)
2213{
2214 if (!ev_is_active (&pipe_w))
2215 {
2216 int fds [2];
2217
2218# if EV_USE_EVENTFD
2219 fds [0] = -1;
2220 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2221 if (fds [1] < 0 && errno == EINVAL)
2222 fds [1] = eventfd (0, 0);
2223
2224 if (fds [1] < 0)
2225# endif
2226 {
2227 while (pipe (fds))
2228 ev_syserr ("(libev) error creating signal/async pipe");
2229
2230 fd_intern (fds [0]);
2231 }
2232
2233 evpipe [0] = fds [0];
2234
2235 if (evpipe [1] < 0)
2236 evpipe [1] = fds [1]; /* first call, set write fd */
2237 else
2238 {
2239 /* on subsequent calls, do not change evpipe [1] */
2240 /* so that evpipe_write can always rely on its value. */
2241 /* this branch does not do anything sensible on windows, */
2242 /* so must not be executed on windows */
2243
2244 dup2 (fds [1], evpipe [1]);
2245 close (fds [1]);
2246 }
2247
2248 fd_intern (evpipe [1]);
2249
2250 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2251 ev_io_start (EV_A_ &pipe_w);
2252 ev_unref (EV_A); /* watcher should not keep loop alive */
2253 }
2254}
2255
2256inline_speed void
2257evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2258{
2259 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2260
2261 if (expect_true (*flag))
2262 return;
2263
2264 *flag = 1;
2265 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2266
2267 pipe_write_skipped = 1;
2268
2269 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2270
2271 if (pipe_write_wanted)
2272 {
2273 int old_errno;
2274
2275 pipe_write_skipped = 0;
2276 ECB_MEMORY_FENCE_RELEASE;
2277
2278 old_errno = errno; /* save errno because write will clobber it */
2279
2280#if EV_USE_EVENTFD
2281 if (evpipe [0] < 0)
2282 {
2283 uint64_t counter = 1;
2284 write (evpipe [1], &counter, sizeof (uint64_t));
2285 }
2286 else
2287#endif
2288 {
781#ifndef _WIN32 2289#ifdef _WIN32
2290 WSABUF buf;
2291 DWORD sent;
2292 buf.buf = &buf;
2293 buf.len = 1;
2294 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2295#else
2296 write (evpipe [1], &(evpipe [1]), 1);
2297#endif
2298 }
2299
2300 errno = old_errno;
2301 }
2302}
2303
2304/* called whenever the libev signal pipe */
2305/* got some events (signal, async) */
2306static void
2307pipecb (EV_P_ ev_io *iow, int revents)
2308{
2309 int i;
2310
2311 if (revents & EV_READ)
2312 {
2313#if EV_USE_EVENTFD
2314 if (evpipe [0] < 0)
2315 {
2316 uint64_t counter;
2317 read (evpipe [1], &counter, sizeof (uint64_t));
2318 }
2319 else
2320#endif
2321 {
2322 char dummy[4];
2323#ifdef _WIN32
2324 WSABUF buf;
2325 DWORD recvd;
2326 DWORD flags = 0;
2327 buf.buf = dummy;
2328 buf.len = sizeof (dummy);
2329 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2330#else
2331 read (evpipe [0], &dummy, sizeof (dummy));
2332#endif
2333 }
2334 }
2335
2336 pipe_write_skipped = 0;
2337
2338 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2339
2340#if EV_SIGNAL_ENABLE
2341 if (sig_pending)
2342 {
2343 sig_pending = 0;
2344
2345 ECB_MEMORY_FENCE;
2346
2347 for (i = EV_NSIG - 1; i--; )
2348 if (expect_false (signals [i].pending))
2349 ev_feed_signal_event (EV_A_ i + 1);
2350 }
2351#endif
2352
2353#if EV_ASYNC_ENABLE
2354 if (async_pending)
2355 {
2356 async_pending = 0;
2357
2358 ECB_MEMORY_FENCE;
2359
2360 for (i = asynccnt; i--; )
2361 if (asyncs [i]->sent)
2362 {
2363 asyncs [i]->sent = 0;
2364 ECB_MEMORY_FENCE_RELEASE;
2365 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2366 }
2367 }
2368#endif
2369}
2370
2371/*****************************************************************************/
2372
2373void
2374ev_feed_signal (int signum) EV_THROW
2375{
2376#if EV_MULTIPLICITY
2377 EV_P;
2378 ECB_MEMORY_FENCE_ACQUIRE;
2379 EV_A = signals [signum - 1].loop;
2380
2381 if (!EV_A)
2382 return;
2383#endif
2384
2385 signals [signum - 1].pending = 1;
2386 evpipe_write (EV_A_ &sig_pending);
2387}
2388
2389static void
2390ev_sighandler (int signum)
2391{
2392#ifdef _WIN32
2393 signal (signum, ev_sighandler);
2394#endif
2395
2396 ev_feed_signal (signum);
2397}
2398
2399void noinline
2400ev_feed_signal_event (EV_P_ int signum) EV_THROW
2401{
2402 WL w;
2403
2404 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2405 return;
2406
2407 --signum;
2408
2409#if EV_MULTIPLICITY
2410 /* it is permissible to try to feed a signal to the wrong loop */
2411 /* or, likely more useful, feeding a signal nobody is waiting for */
2412
2413 if (expect_false (signals [signum].loop != EV_A))
2414 return;
2415#endif
2416
2417 signals [signum].pending = 0;
2418 ECB_MEMORY_FENCE_RELEASE;
2419
2420 for (w = signals [signum].head; w; w = w->next)
2421 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2422}
2423
2424#if EV_USE_SIGNALFD
2425static void
2426sigfdcb (EV_P_ ev_io *iow, int revents)
2427{
2428 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2429
2430 for (;;)
2431 {
2432 ssize_t res = read (sigfd, si, sizeof (si));
2433
2434 /* not ISO-C, as res might be -1, but works with SuS */
2435 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2436 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2437
2438 if (res < (ssize_t)sizeof (si))
2439 break;
2440 }
2441}
2442#endif
2443
2444#endif
2445
2446/*****************************************************************************/
2447
2448#if EV_CHILD_ENABLE
2449static WL childs [EV_PID_HASHSIZE];
782 2450
783static ev_signal childev; 2451static ev_signal childev;
784 2452
785void inline_speed 2453#ifndef WIFCONTINUED
2454# define WIFCONTINUED(status) 0
2455#endif
2456
2457/* handle a single child status event */
2458inline_speed void
786child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2459child_reap (EV_P_ int chain, int pid, int status)
787{ 2460{
788 ev_child *w; 2461 ev_child *w;
2462 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
789 2463
790 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2464 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2465 {
791 if (w->pid == pid || !w->pid) 2466 if ((w->pid == pid || !w->pid)
2467 && (!traced || (w->flags & 1)))
792 { 2468 {
793 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2469 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
794 w->rpid = pid; 2470 w->rpid = pid;
795 w->rstatus = status; 2471 w->rstatus = status;
796 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2472 ev_feed_event (EV_A_ (W)w, EV_CHILD);
797 } 2473 }
2474 }
798} 2475}
799 2476
800#ifndef WCONTINUED 2477#ifndef WCONTINUED
801# define WCONTINUED 0 2478# define WCONTINUED 0
802#endif 2479#endif
803 2480
2481/* called on sigchld etc., calls waitpid */
804static void 2482static void
805childcb (EV_P_ ev_signal *sw, int revents) 2483childcb (EV_P_ ev_signal *sw, int revents)
806{ 2484{
807 int pid, status; 2485 int pid, status;
808 2486
… …
811 if (!WCONTINUED 2489 if (!WCONTINUED
812 || errno != EINVAL 2490 || errno != EINVAL
813 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2491 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
814 return; 2492 return;
815 2493
816 /* make sure we are called again until all childs have been reaped */ 2494 /* make sure we are called again until all children have been reaped */
817 /* we need to do it this way so that the callback gets called before we continue */ 2495 /* we need to do it this way so that the callback gets called before we continue */
818 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2496 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
819 2497
820 child_reap (EV_A_ sw, pid, pid, status); 2498 child_reap (EV_A_ pid, pid, status);
821 if (EV_PID_HASHSIZE > 1) 2499 if ((EV_PID_HASHSIZE) > 1)
822 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2500 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
823} 2501}
824 2502
825#endif 2503#endif
826 2504
827/*****************************************************************************/ 2505/*****************************************************************************/
828 2506
2507#if EV_USE_IOCP
2508# include "ev_iocp.c"
2509#endif
829#if EV_USE_PORT 2510#if EV_USE_PORT
830# include "ev_port.c" 2511# include "ev_port.c"
831#endif 2512#endif
832#if EV_USE_KQUEUE 2513#if EV_USE_KQUEUE
833# include "ev_kqueue.c" 2514# include "ev_kqueue.c"
… …
840#endif 2521#endif
841#if EV_USE_SELECT 2522#if EV_USE_SELECT
842# include "ev_select.c" 2523# include "ev_select.c"
843#endif 2524#endif
844 2525
845int 2526int ecb_cold
846ev_version_major (void) 2527ev_version_major (void) EV_THROW
847{ 2528{
848 return EV_VERSION_MAJOR; 2529 return EV_VERSION_MAJOR;
849} 2530}
850 2531
851int 2532int ecb_cold
852ev_version_minor (void) 2533ev_version_minor (void) EV_THROW
853{ 2534{
854 return EV_VERSION_MINOR; 2535 return EV_VERSION_MINOR;
855} 2536}
856 2537
857/* return true if we are running with elevated privileges and should ignore env variables */ 2538/* return true if we are running with elevated privileges and should ignore env variables */
858int inline_size 2539int inline_size ecb_cold
859enable_secure (void) 2540enable_secure (void)
860{ 2541{
861#ifdef _WIN32 2542#ifdef _WIN32
862 return 0; 2543 return 0;
863#else 2544#else
864 return getuid () != geteuid () 2545 return getuid () != geteuid ()
865 || getgid () != getegid (); 2546 || getgid () != getegid ();
866#endif 2547#endif
867} 2548}
868 2549
869unsigned int 2550unsigned int ecb_cold
870ev_supported_backends (void) 2551ev_supported_backends (void) EV_THROW
871{ 2552{
872 unsigned int flags = 0; 2553 unsigned int flags = 0;
873 2554
874 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2555 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
875 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2556 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
878 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2559 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
879 2560
880 return flags; 2561 return flags;
881} 2562}
882 2563
883unsigned int 2564unsigned int ecb_cold
884ev_recommended_backends (void) 2565ev_recommended_backends (void) EV_THROW
885{ 2566{
886 unsigned int flags = ev_supported_backends (); 2567 unsigned int flags = ev_supported_backends ();
887 2568
888#ifndef __NetBSD__ 2569#ifndef __NetBSD__
889 /* kqueue is borked on everything but netbsd apparently */ 2570 /* kqueue is borked on everything but netbsd apparently */
890 /* it usually doesn't work correctly on anything but sockets and pipes */ 2571 /* it usually doesn't work correctly on anything but sockets and pipes */
891 flags &= ~EVBACKEND_KQUEUE; 2572 flags &= ~EVBACKEND_KQUEUE;
892#endif 2573#endif
893#ifdef __APPLE__ 2574#ifdef __APPLE__
894 // flags &= ~EVBACKEND_KQUEUE; for documentation 2575 /* only select works correctly on that "unix-certified" platform */
895 flags &= ~EVBACKEND_POLL; 2576 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2577 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2578#endif
2579#ifdef __FreeBSD__
2580 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
896#endif 2581#endif
897 2582
898 return flags; 2583 return flags;
899} 2584}
900 2585
2586unsigned int ecb_cold
2587ev_embeddable_backends (void) EV_THROW
2588{
2589 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2590
2591 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2592 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2593 flags &= ~EVBACKEND_EPOLL;
2594
2595 return flags;
2596}
2597
901unsigned int 2598unsigned int
902ev_embeddable_backends (void) 2599ev_backend (EV_P) EV_THROW
903{ 2600{
904 return EVBACKEND_EPOLL 2601 return backend;
905 | EVBACKEND_KQUEUE
906 | EVBACKEND_PORT;
907} 2602}
908 2603
2604#if EV_FEATURE_API
909unsigned int 2605unsigned int
910ev_backend (EV_P) 2606ev_iteration (EV_P) EV_THROW
911{ 2607{
912 return backend; 2608 return loop_count;
913} 2609}
914 2610
915unsigned int 2611unsigned int
916ev_loop_count (EV_P) 2612ev_depth (EV_P) EV_THROW
917{ 2613{
918 return loop_count; 2614 return loop_depth;
919} 2615}
920 2616
2617void
2618ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2619{
2620 io_blocktime = interval;
2621}
2622
2623void
2624ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2625{
2626 timeout_blocktime = interval;
2627}
2628
2629void
2630ev_set_userdata (EV_P_ void *data) EV_THROW
2631{
2632 userdata = data;
2633}
2634
2635void *
2636ev_userdata (EV_P) EV_THROW
2637{
2638 return userdata;
2639}
2640
2641void
2642ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2643{
2644 invoke_cb = invoke_pending_cb;
2645}
2646
2647void
2648ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2649{
2650 release_cb = release;
2651 acquire_cb = acquire;
2652}
2653#endif
2654
2655/* initialise a loop structure, must be zero-initialised */
921static void noinline 2656static void noinline ecb_cold
922loop_init (EV_P_ unsigned int flags) 2657loop_init (EV_P_ unsigned int flags) EV_THROW
923{ 2658{
924 if (!backend) 2659 if (!backend)
925 { 2660 {
2661 origflags = flags;
2662
2663#if EV_USE_REALTIME
2664 if (!have_realtime)
2665 {
2666 struct timespec ts;
2667
2668 if (!clock_gettime (CLOCK_REALTIME, &ts))
2669 have_realtime = 1;
2670 }
2671#endif
2672
926#if EV_USE_MONOTONIC 2673#if EV_USE_MONOTONIC
2674 if (!have_monotonic)
927 { 2675 {
928 struct timespec ts; 2676 struct timespec ts;
2677
929 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2678 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
930 have_monotonic = 1; 2679 have_monotonic = 1;
931 } 2680 }
932#endif 2681#endif
933
934 ev_rt_now = ev_time ();
935 mn_now = get_clock ();
936 now_floor = mn_now;
937 rtmn_diff = ev_rt_now - mn_now;
938 2682
939 /* pid check not overridable via env */ 2683 /* pid check not overridable via env */
940#ifndef _WIN32 2684#ifndef _WIN32
941 if (flags & EVFLAG_FORKCHECK) 2685 if (flags & EVFLAG_FORKCHECK)
942 curpid = getpid (); 2686 curpid = getpid ();
… …
945 if (!(flags & EVFLAG_NOENV) 2689 if (!(flags & EVFLAG_NOENV)
946 && !enable_secure () 2690 && !enable_secure ()
947 && getenv ("LIBEV_FLAGS")) 2691 && getenv ("LIBEV_FLAGS"))
948 flags = atoi (getenv ("LIBEV_FLAGS")); 2692 flags = atoi (getenv ("LIBEV_FLAGS"));
949 2693
950 if (!(flags & 0x0000ffffUL)) 2694 ev_rt_now = ev_time ();
2695 mn_now = get_clock ();
2696 now_floor = mn_now;
2697 rtmn_diff = ev_rt_now - mn_now;
2698#if EV_FEATURE_API
2699 invoke_cb = ev_invoke_pending;
2700#endif
2701
2702 io_blocktime = 0.;
2703 timeout_blocktime = 0.;
2704 backend = 0;
2705 backend_fd = -1;
2706 sig_pending = 0;
2707#if EV_ASYNC_ENABLE
2708 async_pending = 0;
2709#endif
2710 pipe_write_skipped = 0;
2711 pipe_write_wanted = 0;
2712 evpipe [0] = -1;
2713 evpipe [1] = -1;
2714#if EV_USE_INOTIFY
2715 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2716#endif
2717#if EV_USE_SIGNALFD
2718 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2719#endif
2720
2721 if (!(flags & EVBACKEND_MASK))
951 flags |= ev_recommended_backends (); 2722 flags |= ev_recommended_backends ();
952 2723
953 backend = 0;
954 backend_fd = -1;
955#if EV_USE_INOTIFY 2724#if EV_USE_IOCP
956 fs_fd = -2; 2725 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
957#endif 2726#endif
958
959#if EV_USE_PORT 2727#if EV_USE_PORT
960 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2728 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
961#endif 2729#endif
962#if EV_USE_KQUEUE 2730#if EV_USE_KQUEUE
963 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2731 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
970#endif 2738#endif
971#if EV_USE_SELECT 2739#if EV_USE_SELECT
972 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2740 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
973#endif 2741#endif
974 2742
2743 ev_prepare_init (&pending_w, pendingcb);
2744
2745#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
975 ev_init (&sigev, sigcb); 2746 ev_init (&pipe_w, pipecb);
976 ev_set_priority (&sigev, EV_MAXPRI); 2747 ev_set_priority (&pipe_w, EV_MAXPRI);
2748#endif
977 } 2749 }
978} 2750}
979 2751
980static void noinline 2752/* free up a loop structure */
2753void ecb_cold
981loop_destroy (EV_P) 2754ev_loop_destroy (EV_P)
982{ 2755{
983 int i; 2756 int i;
2757
2758#if EV_MULTIPLICITY
2759 /* mimic free (0) */
2760 if (!EV_A)
2761 return;
2762#endif
2763
2764#if EV_CLEANUP_ENABLE
2765 /* queue cleanup watchers (and execute them) */
2766 if (expect_false (cleanupcnt))
2767 {
2768 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2769 EV_INVOKE_PENDING;
2770 }
2771#endif
2772
2773#if EV_CHILD_ENABLE
2774 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2775 {
2776 ev_ref (EV_A); /* child watcher */
2777 ev_signal_stop (EV_A_ &childev);
2778 }
2779#endif
2780
2781 if (ev_is_active (&pipe_w))
2782 {
2783 /*ev_ref (EV_A);*/
2784 /*ev_io_stop (EV_A_ &pipe_w);*/
2785
2786 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2787 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2788 }
2789
2790#if EV_USE_SIGNALFD
2791 if (ev_is_active (&sigfd_w))
2792 close (sigfd);
2793#endif
984 2794
985#if EV_USE_INOTIFY 2795#if EV_USE_INOTIFY
986 if (fs_fd >= 0) 2796 if (fs_fd >= 0)
987 close (fs_fd); 2797 close (fs_fd);
988#endif 2798#endif
989 2799
990 if (backend_fd >= 0) 2800 if (backend_fd >= 0)
991 close (backend_fd); 2801 close (backend_fd);
992 2802
2803#if EV_USE_IOCP
2804 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2805#endif
993#if EV_USE_PORT 2806#if EV_USE_PORT
994 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2807 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
995#endif 2808#endif
996#if EV_USE_KQUEUE 2809#if EV_USE_KQUEUE
997 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2810 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1012#if EV_IDLE_ENABLE 2825#if EV_IDLE_ENABLE
1013 array_free (idle, [i]); 2826 array_free (idle, [i]);
1014#endif 2827#endif
1015 } 2828 }
1016 2829
2830 ev_free (anfds); anfds = 0; anfdmax = 0;
2831
1017 /* have to use the microsoft-never-gets-it-right macro */ 2832 /* have to use the microsoft-never-gets-it-right macro */
2833 array_free (rfeed, EMPTY);
1018 array_free (fdchange, EMPTY); 2834 array_free (fdchange, EMPTY);
1019 array_free (timer, EMPTY); 2835 array_free (timer, EMPTY);
1020#if EV_PERIODIC_ENABLE 2836#if EV_PERIODIC_ENABLE
1021 array_free (periodic, EMPTY); 2837 array_free (periodic, EMPTY);
1022#endif 2838#endif
2839#if EV_FORK_ENABLE
2840 array_free (fork, EMPTY);
2841#endif
2842#if EV_CLEANUP_ENABLE
2843 array_free (cleanup, EMPTY);
2844#endif
1023 array_free (prepare, EMPTY); 2845 array_free (prepare, EMPTY);
1024 array_free (check, EMPTY); 2846 array_free (check, EMPTY);
2847#if EV_ASYNC_ENABLE
2848 array_free (async, EMPTY);
2849#endif
1025 2850
1026 backend = 0; 2851 backend = 0;
1027}
1028 2852
2853#if EV_MULTIPLICITY
2854 if (ev_is_default_loop (EV_A))
2855#endif
2856 ev_default_loop_ptr = 0;
2857#if EV_MULTIPLICITY
2858 else
2859 ev_free (EV_A);
2860#endif
2861}
2862
2863#if EV_USE_INOTIFY
1029void inline_size infy_fork (EV_P); 2864inline_size void infy_fork (EV_P);
2865#endif
1030 2866
1031void inline_size 2867inline_size void
1032loop_fork (EV_P) 2868loop_fork (EV_P)
1033{ 2869{
1034#if EV_USE_PORT 2870#if EV_USE_PORT
1035 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2871 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1036#endif 2872#endif
… …
1042#endif 2878#endif
1043#if EV_USE_INOTIFY 2879#if EV_USE_INOTIFY
1044 infy_fork (EV_A); 2880 infy_fork (EV_A);
1045#endif 2881#endif
1046 2882
2883#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1047 if (ev_is_active (&sigev)) 2884 if (ev_is_active (&pipe_w))
1048 { 2885 {
1049 /* default loop */ 2886 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1050 2887
1051 ev_ref (EV_A); 2888 ev_ref (EV_A);
1052 ev_io_stop (EV_A_ &sigev); 2889 ev_io_stop (EV_A_ &pipe_w);
1053 close (sigpipe [0]);
1054 close (sigpipe [1]);
1055 2890
1056 while (pipe (sigpipe)) 2891 if (evpipe [0] >= 0)
1057 syserr ("(libev) error creating pipe"); 2892 EV_WIN32_CLOSE_FD (evpipe [0]);
1058 2893
1059 siginit (EV_A); 2894 evpipe_init (EV_A);
2895 /* iterate over everything, in case we missed something before */
2896 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1060 } 2897 }
2898#endif
1061 2899
1062 postfork = 0; 2900 postfork = 0;
1063} 2901}
1064 2902
1065#if EV_MULTIPLICITY 2903#if EV_MULTIPLICITY
2904
1066struct ev_loop * 2905struct ev_loop * ecb_cold
1067ev_loop_new (unsigned int flags) 2906ev_loop_new (unsigned int flags) EV_THROW
1068{ 2907{
1069 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2908 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1070 2909
1071 memset (loop, 0, sizeof (struct ev_loop)); 2910 memset (EV_A, 0, sizeof (struct ev_loop));
1072
1073 loop_init (EV_A_ flags); 2911 loop_init (EV_A_ flags);
1074 2912
1075 if (ev_backend (EV_A)) 2913 if (ev_backend (EV_A))
1076 return loop; 2914 return EV_A;
1077 2915
2916 ev_free (EV_A);
1078 return 0; 2917 return 0;
1079} 2918}
1080 2919
1081void 2920#endif /* multiplicity */
1082ev_loop_destroy (EV_P)
1083{
1084 loop_destroy (EV_A);
1085 ev_free (loop);
1086}
1087 2921
1088void 2922#if EV_VERIFY
1089ev_loop_fork (EV_P) 2923static void noinline ecb_cold
2924verify_watcher (EV_P_ W w)
1090{ 2925{
1091 postfork = 1; 2926 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1092}
1093 2927
2928 if (w->pending)
2929 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2930}
2931
2932static void noinline ecb_cold
2933verify_heap (EV_P_ ANHE *heap, int N)
2934{
2935 int i;
2936
2937 for (i = HEAP0; i < N + HEAP0; ++i)
2938 {
2939 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2940 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2941 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2942
2943 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2944 }
2945}
2946
2947static void noinline ecb_cold
2948array_verify (EV_P_ W *ws, int cnt)
2949{
2950 while (cnt--)
2951 {
2952 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2953 verify_watcher (EV_A_ ws [cnt]);
2954 }
2955}
2956#endif
2957
2958#if EV_FEATURE_API
2959void ecb_cold
2960ev_verify (EV_P) EV_THROW
2961{
2962#if EV_VERIFY
2963 int i;
2964 WL w, w2;
2965
2966 assert (activecnt >= -1);
2967
2968 assert (fdchangemax >= fdchangecnt);
2969 for (i = 0; i < fdchangecnt; ++i)
2970 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2971
2972 assert (anfdmax >= 0);
2973 for (i = 0; i < anfdmax; ++i)
2974 {
2975 int j = 0;
2976
2977 for (w = w2 = anfds [i].head; w; w = w->next)
2978 {
2979 verify_watcher (EV_A_ (W)w);
2980
2981 if (j++ & 1)
2982 {
2983 assert (("libev: io watcher list contains a loop", w != w2));
2984 w2 = w2->next;
2985 }
2986
2987 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2988 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2989 }
2990 }
2991
2992 assert (timermax >= timercnt);
2993 verify_heap (EV_A_ timers, timercnt);
2994
2995#if EV_PERIODIC_ENABLE
2996 assert (periodicmax >= periodiccnt);
2997 verify_heap (EV_A_ periodics, periodiccnt);
2998#endif
2999
3000 for (i = NUMPRI; i--; )
3001 {
3002 assert (pendingmax [i] >= pendingcnt [i]);
3003#if EV_IDLE_ENABLE
3004 assert (idleall >= 0);
3005 assert (idlemax [i] >= idlecnt [i]);
3006 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3007#endif
3008 }
3009
3010#if EV_FORK_ENABLE
3011 assert (forkmax >= forkcnt);
3012 array_verify (EV_A_ (W *)forks, forkcnt);
3013#endif
3014
3015#if EV_CLEANUP_ENABLE
3016 assert (cleanupmax >= cleanupcnt);
3017 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3018#endif
3019
3020#if EV_ASYNC_ENABLE
3021 assert (asyncmax >= asynccnt);
3022 array_verify (EV_A_ (W *)asyncs, asynccnt);
3023#endif
3024
3025#if EV_PREPARE_ENABLE
3026 assert (preparemax >= preparecnt);
3027 array_verify (EV_A_ (W *)prepares, preparecnt);
3028#endif
3029
3030#if EV_CHECK_ENABLE
3031 assert (checkmax >= checkcnt);
3032 array_verify (EV_A_ (W *)checks, checkcnt);
3033#endif
3034
3035# if 0
3036#if EV_CHILD_ENABLE
3037 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3038 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3039#endif
3040# endif
3041#endif
3042}
1094#endif 3043#endif
1095 3044
1096#if EV_MULTIPLICITY 3045#if EV_MULTIPLICITY
1097struct ev_loop * 3046struct ev_loop * ecb_cold
1098ev_default_loop_init (unsigned int flags)
1099#else 3047#else
1100int 3048int
3049#endif
1101ev_default_loop (unsigned int flags) 3050ev_default_loop (unsigned int flags) EV_THROW
1102#endif
1103{ 3051{
1104 if (sigpipe [0] == sigpipe [1])
1105 if (pipe (sigpipe))
1106 return 0;
1107
1108 if (!ev_default_loop_ptr) 3052 if (!ev_default_loop_ptr)
1109 { 3053 {
1110#if EV_MULTIPLICITY 3054#if EV_MULTIPLICITY
1111 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3055 EV_P = ev_default_loop_ptr = &default_loop_struct;
1112#else 3056#else
1113 ev_default_loop_ptr = 1; 3057 ev_default_loop_ptr = 1;
1114#endif 3058#endif
1115 3059
1116 loop_init (EV_A_ flags); 3060 loop_init (EV_A_ flags);
1117 3061
1118 if (ev_backend (EV_A)) 3062 if (ev_backend (EV_A))
1119 { 3063 {
1120 siginit (EV_A); 3064#if EV_CHILD_ENABLE
1121
1122#ifndef _WIN32
1123 ev_signal_init (&childev, childcb, SIGCHLD); 3065 ev_signal_init (&childev, childcb, SIGCHLD);
1124 ev_set_priority (&childev, EV_MAXPRI); 3066 ev_set_priority (&childev, EV_MAXPRI);
1125 ev_signal_start (EV_A_ &childev); 3067 ev_signal_start (EV_A_ &childev);
1126 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3068 ev_unref (EV_A); /* child watcher should not keep loop alive */
1127#endif 3069#endif
… …
1132 3074
1133 return ev_default_loop_ptr; 3075 return ev_default_loop_ptr;
1134} 3076}
1135 3077
1136void 3078void
1137ev_default_destroy (void) 3079ev_loop_fork (EV_P) EV_THROW
1138{ 3080{
1139#if EV_MULTIPLICITY
1140 struct ev_loop *loop = ev_default_loop_ptr;
1141#endif
1142
1143#ifndef _WIN32
1144 ev_ref (EV_A); /* child watcher */
1145 ev_signal_stop (EV_A_ &childev);
1146#endif
1147
1148 ev_ref (EV_A); /* signal watcher */
1149 ev_io_stop (EV_A_ &sigev);
1150
1151 close (sigpipe [0]); sigpipe [0] = 0;
1152 close (sigpipe [1]); sigpipe [1] = 0;
1153
1154 loop_destroy (EV_A);
1155}
1156
1157void
1158ev_default_fork (void)
1159{
1160#if EV_MULTIPLICITY
1161 struct ev_loop *loop = ev_default_loop_ptr;
1162#endif
1163
1164 if (backend)
1165 postfork = 1; 3081 postfork = 1;
1166} 3082}
1167 3083
1168/*****************************************************************************/ 3084/*****************************************************************************/
1169 3085
1170void 3086void
1171ev_invoke (EV_P_ void *w, int revents) 3087ev_invoke (EV_P_ void *w, int revents)
1172{ 3088{
1173 EV_CB_INVOKE ((W)w, revents); 3089 EV_CB_INVOKE ((W)w, revents);
1174} 3090}
1175 3091
1176void inline_speed 3092unsigned int
1177call_pending (EV_P) 3093ev_pending_count (EV_P) EV_THROW
1178{ 3094{
1179 int pri; 3095 int pri;
3096 unsigned int count = 0;
1180 3097
1181 for (pri = NUMPRI; pri--; ) 3098 for (pri = NUMPRI; pri--; )
3099 count += pendingcnt [pri];
3100
3101 return count;
3102}
3103
3104void noinline
3105ev_invoke_pending (EV_P)
3106{
3107 pendingpri = NUMPRI;
3108
3109 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3110 {
3111 --pendingpri;
3112
1182 while (pendingcnt [pri]) 3113 while (pendingcnt [pendingpri])
1183 {
1184 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1185
1186 if (expect_true (p->w))
1187 {
1188 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1189
1190 p->w->pending = 0;
1191 EV_CB_INVOKE (p->w, p->events);
1192 }
1193 }
1194}
1195
1196void inline_size
1197timers_reify (EV_P)
1198{
1199 while (timercnt && ((WT)timers [0])->at <= mn_now)
1200 {
1201 ev_timer *w = timers [0];
1202
1203 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1204
1205 /* first reschedule or stop timer */
1206 if (w->repeat)
1207 { 3114 {
1208 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3115 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1209 3116
1210 ((WT)w)->at += w->repeat; 3117 p->w->pending = 0;
1211 if (((WT)w)->at < mn_now) 3118 EV_CB_INVOKE (p->w, p->events);
1212 ((WT)w)->at = mn_now; 3119 EV_FREQUENT_CHECK;
1213
1214 downheap ((WT *)timers, timercnt, 0);
1215 } 3120 }
1216 else
1217 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1218
1219 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1220 }
1221}
1222
1223#if EV_PERIODIC_ENABLE
1224void inline_size
1225periodics_reify (EV_P)
1226{
1227 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1228 { 3121 }
1229 ev_periodic *w = periodics [0];
1230
1231 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1232
1233 /* first reschedule or stop timer */
1234 if (w->reschedule_cb)
1235 {
1236 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1237 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1238 downheap ((WT *)periodics, periodiccnt, 0);
1239 }
1240 else if (w->interval)
1241 {
1242 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1243 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1244 downheap ((WT *)periodics, periodiccnt, 0);
1245 }
1246 else
1247 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1248
1249 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1250 }
1251} 3122}
1252
1253static void noinline
1254periodics_reschedule (EV_P)
1255{
1256 int i;
1257
1258 /* adjust periodics after time jump */
1259 for (i = 0; i < periodiccnt; ++i)
1260 {
1261 ev_periodic *w = periodics [i];
1262
1263 if (w->reschedule_cb)
1264 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1265 else if (w->interval)
1266 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1267 }
1268
1269 /* now rebuild the heap */
1270 for (i = periodiccnt >> 1; i--; )
1271 downheap ((WT *)periodics, periodiccnt, i);
1272}
1273#endif
1274 3123
1275#if EV_IDLE_ENABLE 3124#if EV_IDLE_ENABLE
1276void inline_size 3125/* make idle watchers pending. this handles the "call-idle */
3126/* only when higher priorities are idle" logic */
3127inline_size void
1277idle_reify (EV_P) 3128idle_reify (EV_P)
1278{ 3129{
1279 if (expect_false (idleall)) 3130 if (expect_false (idleall))
1280 { 3131 {
1281 int pri; 3132 int pri;
… …
1293 } 3144 }
1294 } 3145 }
1295} 3146}
1296#endif 3147#endif
1297 3148
1298int inline_size 3149/* make timers pending */
1299time_update_monotonic (EV_P) 3150inline_size void
3151timers_reify (EV_P)
1300{ 3152{
3153 EV_FREQUENT_CHECK;
3154
3155 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3156 {
3157 do
3158 {
3159 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3160
3161 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3162
3163 /* first reschedule or stop timer */
3164 if (w->repeat)
3165 {
3166 ev_at (w) += w->repeat;
3167 if (ev_at (w) < mn_now)
3168 ev_at (w) = mn_now;
3169
3170 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3171
3172 ANHE_at_cache (timers [HEAP0]);
3173 downheap (timers, timercnt, HEAP0);
3174 }
3175 else
3176 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3177
3178 EV_FREQUENT_CHECK;
3179 feed_reverse (EV_A_ (W)w);
3180 }
3181 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3182
3183 feed_reverse_done (EV_A_ EV_TIMER);
3184 }
3185}
3186
3187#if EV_PERIODIC_ENABLE
3188
3189static void noinline
3190periodic_recalc (EV_P_ ev_periodic *w)
3191{
3192 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3193 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3194
3195 /* the above almost always errs on the low side */
3196 while (at <= ev_rt_now)
3197 {
3198 ev_tstamp nat = at + w->interval;
3199
3200 /* when resolution fails us, we use ev_rt_now */
3201 if (expect_false (nat == at))
3202 {
3203 at = ev_rt_now;
3204 break;
3205 }
3206
3207 at = nat;
3208 }
3209
3210 ev_at (w) = at;
3211}
3212
3213/* make periodics pending */
3214inline_size void
3215periodics_reify (EV_P)
3216{
3217 EV_FREQUENT_CHECK;
3218
3219 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3220 {
3221 do
3222 {
3223 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3224
3225 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3226
3227 /* first reschedule or stop timer */
3228 if (w->reschedule_cb)
3229 {
3230 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3231
3232 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3233
3234 ANHE_at_cache (periodics [HEAP0]);
3235 downheap (periodics, periodiccnt, HEAP0);
3236 }
3237 else if (w->interval)
3238 {
3239 periodic_recalc (EV_A_ w);
3240 ANHE_at_cache (periodics [HEAP0]);
3241 downheap (periodics, periodiccnt, HEAP0);
3242 }
3243 else
3244 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3245
3246 EV_FREQUENT_CHECK;
3247 feed_reverse (EV_A_ (W)w);
3248 }
3249 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3250
3251 feed_reverse_done (EV_A_ EV_PERIODIC);
3252 }
3253}
3254
3255/* simply recalculate all periodics */
3256/* TODO: maybe ensure that at least one event happens when jumping forward? */
3257static void noinline ecb_cold
3258periodics_reschedule (EV_P)
3259{
3260 int i;
3261
3262 /* adjust periodics after time jump */
3263 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3264 {
3265 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3266
3267 if (w->reschedule_cb)
3268 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3269 else if (w->interval)
3270 periodic_recalc (EV_A_ w);
3271
3272 ANHE_at_cache (periodics [i]);
3273 }
3274
3275 reheap (periodics, periodiccnt);
3276}
3277#endif
3278
3279/* adjust all timers by a given offset */
3280static void noinline ecb_cold
3281timers_reschedule (EV_P_ ev_tstamp adjust)
3282{
3283 int i;
3284
3285 for (i = 0; i < timercnt; ++i)
3286 {
3287 ANHE *he = timers + i + HEAP0;
3288 ANHE_w (*he)->at += adjust;
3289 ANHE_at_cache (*he);
3290 }
3291}
3292
3293/* fetch new monotonic and realtime times from the kernel */
3294/* also detect if there was a timejump, and act accordingly */
3295inline_speed void
3296time_update (EV_P_ ev_tstamp max_block)
3297{
3298#if EV_USE_MONOTONIC
3299 if (expect_true (have_monotonic))
3300 {
3301 int i;
3302 ev_tstamp odiff = rtmn_diff;
3303
1301 mn_now = get_clock (); 3304 mn_now = get_clock ();
1302 3305
3306 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3307 /* interpolate in the meantime */
1303 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3308 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1304 { 3309 {
1305 ev_rt_now = rtmn_diff + mn_now; 3310 ev_rt_now = rtmn_diff + mn_now;
1306 return 0; 3311 return;
1307 } 3312 }
1308 else 3313
1309 {
1310 now_floor = mn_now; 3314 now_floor = mn_now;
1311 ev_rt_now = ev_time (); 3315 ev_rt_now = ev_time ();
1312 return 1;
1313 }
1314}
1315 3316
1316void inline_size 3317 /* loop a few times, before making important decisions.
1317time_update (EV_P) 3318 * on the choice of "4": one iteration isn't enough,
1318{ 3319 * in case we get preempted during the calls to
1319 int i; 3320 * ev_time and get_clock. a second call is almost guaranteed
1320 3321 * to succeed in that case, though. and looping a few more times
1321#if EV_USE_MONOTONIC 3322 * doesn't hurt either as we only do this on time-jumps or
1322 if (expect_true (have_monotonic)) 3323 * in the unlikely event of having been preempted here.
1323 { 3324 */
1324 if (time_update_monotonic (EV_A)) 3325 for (i = 4; --i; )
1325 { 3326 {
1326 ev_tstamp odiff = rtmn_diff; 3327 ev_tstamp diff;
1327
1328 /* loop a few times, before making important decisions.
1329 * on the choice of "4": one iteration isn't enough,
1330 * in case we get preempted during the calls to
1331 * ev_time and get_clock. a second call is almost guaranteed
1332 * to succeed in that case, though. and looping a few more times
1333 * doesn't hurt either as we only do this on time-jumps or
1334 * in the unlikely event of having been preempted here.
1335 */
1336 for (i = 4; --i; )
1337 {
1338 rtmn_diff = ev_rt_now - mn_now; 3328 rtmn_diff = ev_rt_now - mn_now;
1339 3329
1340 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 3330 diff = odiff - rtmn_diff;
3331
3332 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1341 return; /* all is well */ 3333 return; /* all is well */
1342 3334
1343 ev_rt_now = ev_time (); 3335 ev_rt_now = ev_time ();
1344 mn_now = get_clock (); 3336 mn_now = get_clock ();
1345 now_floor = mn_now; 3337 now_floor = mn_now;
1346 } 3338 }
1347 3339
3340 /* no timer adjustment, as the monotonic clock doesn't jump */
3341 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1348# if EV_PERIODIC_ENABLE 3342# if EV_PERIODIC_ENABLE
1349 periodics_reschedule (EV_A); 3343 periodics_reschedule (EV_A);
1350# endif 3344# endif
1351 /* no timer adjustment, as the monotonic clock doesn't jump */
1352 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1353 }
1354 } 3345 }
1355 else 3346 else
1356#endif 3347#endif
1357 { 3348 {
1358 ev_rt_now = ev_time (); 3349 ev_rt_now = ev_time ();
1359 3350
1360 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 3351 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1361 { 3352 {
3353 /* adjust timers. this is easy, as the offset is the same for all of them */
3354 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1362#if EV_PERIODIC_ENABLE 3355#if EV_PERIODIC_ENABLE
1363 periodics_reschedule (EV_A); 3356 periodics_reschedule (EV_A);
1364#endif 3357#endif
1365
1366 /* adjust timers. this is easy, as the offset is the same for all of them */
1367 for (i = 0; i < timercnt; ++i)
1368 ((WT)timers [i])->at += ev_rt_now - mn_now;
1369 } 3358 }
1370 3359
1371 mn_now = ev_rt_now; 3360 mn_now = ev_rt_now;
1372 } 3361 }
1373} 3362}
1374 3363
1375void 3364int
1376ev_ref (EV_P)
1377{
1378 ++activecnt;
1379}
1380
1381void
1382ev_unref (EV_P)
1383{
1384 --activecnt;
1385}
1386
1387static int loop_done;
1388
1389void
1390ev_loop (EV_P_ int flags) 3365ev_run (EV_P_ int flags)
1391{ 3366{
1392 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 3367#if EV_FEATURE_API
1393 ? EVUNLOOP_ONE 3368 ++loop_depth;
1394 : EVUNLOOP_CANCEL; 3369#endif
1395 3370
3371 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3372
3373 loop_done = EVBREAK_CANCEL;
3374
1396 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3375 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1397 3376
1398 do 3377 do
1399 { 3378 {
3379#if EV_VERIFY >= 2
3380 ev_verify (EV_A);
3381#endif
3382
1400#ifndef _WIN32 3383#ifndef _WIN32
1401 if (expect_false (curpid)) /* penalise the forking check even more */ 3384 if (expect_false (curpid)) /* penalise the forking check even more */
1402 if (expect_false (getpid () != curpid)) 3385 if (expect_false (getpid () != curpid))
1403 { 3386 {
1404 curpid = getpid (); 3387 curpid = getpid ();
… …
1410 /* we might have forked, so queue fork handlers */ 3393 /* we might have forked, so queue fork handlers */
1411 if (expect_false (postfork)) 3394 if (expect_false (postfork))
1412 if (forkcnt) 3395 if (forkcnt)
1413 { 3396 {
1414 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3397 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1415 call_pending (EV_A); 3398 EV_INVOKE_PENDING;
1416 } 3399 }
1417#endif 3400#endif
1418 3401
3402#if EV_PREPARE_ENABLE
1419 /* queue prepare watchers (and execute them) */ 3403 /* queue prepare watchers (and execute them) */
1420 if (expect_false (preparecnt)) 3404 if (expect_false (preparecnt))
1421 { 3405 {
1422 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3406 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1423 call_pending (EV_A); 3407 EV_INVOKE_PENDING;
1424 } 3408 }
3409#endif
1425 3410
1426 if (expect_false (!activecnt)) 3411 if (expect_false (loop_done))
1427 break; 3412 break;
1428 3413
1429 /* we might have forked, so reify kernel state if necessary */ 3414 /* we might have forked, so reify kernel state if necessary */
1430 if (expect_false (postfork)) 3415 if (expect_false (postfork))
1431 loop_fork (EV_A); 3416 loop_fork (EV_A);
… …
1433 /* update fd-related kernel structures */ 3418 /* update fd-related kernel structures */
1434 fd_reify (EV_A); 3419 fd_reify (EV_A);
1435 3420
1436 /* calculate blocking time */ 3421 /* calculate blocking time */
1437 { 3422 {
1438 ev_tstamp block; 3423 ev_tstamp waittime = 0.;
3424 ev_tstamp sleeptime = 0.;
1439 3425
1440 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 3426 /* remember old timestamp for io_blocktime calculation */
1441 block = 0.; /* do not block at all */ 3427 ev_tstamp prev_mn_now = mn_now;
1442 else 3428
3429 /* update time to cancel out callback processing overhead */
3430 time_update (EV_A_ 1e100);
3431
3432 /* from now on, we want a pipe-wake-up */
3433 pipe_write_wanted = 1;
3434
3435 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3436
3437 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1443 { 3438 {
1444 /* update time to cancel out callback processing overhead */
1445#if EV_USE_MONOTONIC
1446 if (expect_true (have_monotonic))
1447 time_update_monotonic (EV_A);
1448 else
1449#endif
1450 {
1451 ev_rt_now = ev_time ();
1452 mn_now = ev_rt_now;
1453 }
1454
1455 block = MAX_BLOCKTIME; 3439 waittime = MAX_BLOCKTIME;
1456 3440
1457 if (timercnt) 3441 if (timercnt)
1458 { 3442 {
1459 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3443 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1460 if (block > to) block = to; 3444 if (waittime > to) waittime = to;
1461 } 3445 }
1462 3446
1463#if EV_PERIODIC_ENABLE 3447#if EV_PERIODIC_ENABLE
1464 if (periodiccnt) 3448 if (periodiccnt)
1465 { 3449 {
1466 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3450 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1467 if (block > to) block = to; 3451 if (waittime > to) waittime = to;
1468 } 3452 }
1469#endif 3453#endif
1470 3454
3455 /* don't let timeouts decrease the waittime below timeout_blocktime */
3456 if (expect_false (waittime < timeout_blocktime))
3457 waittime = timeout_blocktime;
3458
3459 /* at this point, we NEED to wait, so we have to ensure */
3460 /* to pass a minimum nonzero value to the backend */
3461 if (expect_false (waittime < backend_mintime))
3462 waittime = backend_mintime;
3463
3464 /* extra check because io_blocktime is commonly 0 */
1471 if (expect_false (block < 0.)) block = 0.; 3465 if (expect_false (io_blocktime))
3466 {
3467 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3468
3469 if (sleeptime > waittime - backend_mintime)
3470 sleeptime = waittime - backend_mintime;
3471
3472 if (expect_true (sleeptime > 0.))
3473 {
3474 ev_sleep (sleeptime);
3475 waittime -= sleeptime;
3476 }
3477 }
1472 } 3478 }
1473 3479
3480#if EV_FEATURE_API
1474 ++loop_count; 3481 ++loop_count;
3482#endif
3483 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1475 backend_poll (EV_A_ block); 3484 backend_poll (EV_A_ waittime);
3485 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3486
3487 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3488
3489 ECB_MEMORY_FENCE_ACQUIRE;
3490 if (pipe_write_skipped)
3491 {
3492 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3493 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3494 }
3495
3496
3497 /* update ev_rt_now, do magic */
3498 time_update (EV_A_ waittime + sleeptime);
1476 } 3499 }
1477
1478 /* update ev_rt_now, do magic */
1479 time_update (EV_A);
1480 3500
1481 /* queue pending timers and reschedule them */ 3501 /* queue pending timers and reschedule them */
1482 timers_reify (EV_A); /* relative timers called last */ 3502 timers_reify (EV_A); /* relative timers called last */
1483#if EV_PERIODIC_ENABLE 3503#if EV_PERIODIC_ENABLE
1484 periodics_reify (EV_A); /* absolute timers called first */ 3504 periodics_reify (EV_A); /* absolute timers called first */
… …
1487#if EV_IDLE_ENABLE 3507#if EV_IDLE_ENABLE
1488 /* queue idle watchers unless other events are pending */ 3508 /* queue idle watchers unless other events are pending */
1489 idle_reify (EV_A); 3509 idle_reify (EV_A);
1490#endif 3510#endif
1491 3511
3512#if EV_CHECK_ENABLE
1492 /* queue check watchers, to be executed first */ 3513 /* queue check watchers, to be executed first */
1493 if (expect_false (checkcnt)) 3514 if (expect_false (checkcnt))
1494 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3515 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3516#endif
1495 3517
1496 call_pending (EV_A); 3518 EV_INVOKE_PENDING;
1497
1498 } 3519 }
1499 while (expect_true (activecnt && !loop_done)); 3520 while (expect_true (
3521 activecnt
3522 && !loop_done
3523 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3524 ));
1500 3525
1501 if (loop_done == EVUNLOOP_ONE) 3526 if (loop_done == EVBREAK_ONE)
1502 loop_done = EVUNLOOP_CANCEL; 3527 loop_done = EVBREAK_CANCEL;
3528
3529#if EV_FEATURE_API
3530 --loop_depth;
3531#endif
3532
3533 return activecnt;
1503} 3534}
1504 3535
1505void 3536void
1506ev_unloop (EV_P_ int how) 3537ev_break (EV_P_ int how) EV_THROW
1507{ 3538{
1508 loop_done = how; 3539 loop_done = how;
1509} 3540}
1510 3541
3542void
3543ev_ref (EV_P) EV_THROW
3544{
3545 ++activecnt;
3546}
3547
3548void
3549ev_unref (EV_P) EV_THROW
3550{
3551 --activecnt;
3552}
3553
3554void
3555ev_now_update (EV_P) EV_THROW
3556{
3557 time_update (EV_A_ 1e100);
3558}
3559
3560void
3561ev_suspend (EV_P) EV_THROW
3562{
3563 ev_now_update (EV_A);
3564}
3565
3566void
3567ev_resume (EV_P) EV_THROW
3568{
3569 ev_tstamp mn_prev = mn_now;
3570
3571 ev_now_update (EV_A);
3572 timers_reschedule (EV_A_ mn_now - mn_prev);
3573#if EV_PERIODIC_ENABLE
3574 /* TODO: really do this? */
3575 periodics_reschedule (EV_A);
3576#endif
3577}
3578
1511/*****************************************************************************/ 3579/*****************************************************************************/
3580/* singly-linked list management, used when the expected list length is short */
1512 3581
1513void inline_size 3582inline_size void
1514wlist_add (WL *head, WL elem) 3583wlist_add (WL *head, WL elem)
1515{ 3584{
1516 elem->next = *head; 3585 elem->next = *head;
1517 *head = elem; 3586 *head = elem;
1518} 3587}
1519 3588
1520void inline_size 3589inline_size void
1521wlist_del (WL *head, WL elem) 3590wlist_del (WL *head, WL elem)
1522{ 3591{
1523 while (*head) 3592 while (*head)
1524 { 3593 {
1525 if (*head == elem) 3594 if (expect_true (*head == elem))
1526 { 3595 {
1527 *head = elem->next; 3596 *head = elem->next;
1528 return; 3597 break;
1529 } 3598 }
1530 3599
1531 head = &(*head)->next; 3600 head = &(*head)->next;
1532 } 3601 }
1533} 3602}
1534 3603
1535void inline_speed 3604/* internal, faster, version of ev_clear_pending */
3605inline_speed void
1536clear_pending (EV_P_ W w) 3606clear_pending (EV_P_ W w)
1537{ 3607{
1538 if (w->pending) 3608 if (w->pending)
1539 { 3609 {
1540 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3610 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1541 w->pending = 0; 3611 w->pending = 0;
1542 } 3612 }
1543} 3613}
1544 3614
1545int 3615int
1546ev_clear_pending (EV_P_ void *w) 3616ev_clear_pending (EV_P_ void *w) EV_THROW
1547{ 3617{
1548 W w_ = (W)w; 3618 W w_ = (W)w;
1549 int pending = w_->pending; 3619 int pending = w_->pending;
1550 3620
1551 if (!pending) 3621 if (expect_true (pending))
3622 {
3623 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3624 p->w = (W)&pending_w;
3625 w_->pending = 0;
3626 return p->events;
3627 }
3628 else
1552 return 0; 3629 return 0;
1553
1554 w_->pending = 0;
1555 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1556 p->w = 0;
1557
1558 return p->events;
1559} 3630}
1560 3631
1561void inline_size 3632inline_size void
1562pri_adjust (EV_P_ W w) 3633pri_adjust (EV_P_ W w)
1563{ 3634{
1564 int pri = w->priority; 3635 int pri = ev_priority (w);
1565 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3636 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1566 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3637 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1567 w->priority = pri; 3638 ev_set_priority (w, pri);
1568} 3639}
1569 3640
1570void inline_speed 3641inline_speed void
1571ev_start (EV_P_ W w, int active) 3642ev_start (EV_P_ W w, int active)
1572{ 3643{
1573 pri_adjust (EV_A_ w); 3644 pri_adjust (EV_A_ w);
1574 w->active = active; 3645 w->active = active;
1575 ev_ref (EV_A); 3646 ev_ref (EV_A);
1576} 3647}
1577 3648
1578void inline_size 3649inline_size void
1579ev_stop (EV_P_ W w) 3650ev_stop (EV_P_ W w)
1580{ 3651{
1581 ev_unref (EV_A); 3652 ev_unref (EV_A);
1582 w->active = 0; 3653 w->active = 0;
1583} 3654}
1584 3655
1585/*****************************************************************************/ 3656/*****************************************************************************/
1586 3657
1587void noinline 3658void noinline
1588ev_io_start (EV_P_ ev_io *w) 3659ev_io_start (EV_P_ ev_io *w) EV_THROW
1589{ 3660{
1590 int fd = w->fd; 3661 int fd = w->fd;
1591 3662
1592 if (expect_false (ev_is_active (w))) 3663 if (expect_false (ev_is_active (w)))
1593 return; 3664 return;
1594 3665
1595 assert (("ev_io_start called with negative fd", fd >= 0)); 3666 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3667 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3668
3669 EV_FREQUENT_CHECK;
1596 3670
1597 ev_start (EV_A_ (W)w, 1); 3671 ev_start (EV_A_ (W)w, 1);
1598 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3672 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1599 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3673 wlist_add (&anfds[fd].head, (WL)w);
1600 3674
1601 fd_change (EV_A_ fd); 3675 /* common bug, apparently */
3676 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3677
3678 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3679 w->events &= ~EV__IOFDSET;
3680
3681 EV_FREQUENT_CHECK;
1602} 3682}
1603 3683
1604void noinline 3684void noinline
1605ev_io_stop (EV_P_ ev_io *w) 3685ev_io_stop (EV_P_ ev_io *w) EV_THROW
1606{ 3686{
1607 clear_pending (EV_A_ (W)w); 3687 clear_pending (EV_A_ (W)w);
1608 if (expect_false (!ev_is_active (w))) 3688 if (expect_false (!ev_is_active (w)))
1609 return; 3689 return;
1610 3690
1611 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3691 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1612 3692
3693 EV_FREQUENT_CHECK;
3694
1613 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3695 wlist_del (&anfds[w->fd].head, (WL)w);
1614 ev_stop (EV_A_ (W)w); 3696 ev_stop (EV_A_ (W)w);
1615 3697
1616 fd_change (EV_A_ w->fd); 3698 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3699
3700 EV_FREQUENT_CHECK;
1617} 3701}
1618 3702
1619void noinline 3703void noinline
1620ev_timer_start (EV_P_ ev_timer *w) 3704ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1621{ 3705{
1622 if (expect_false (ev_is_active (w))) 3706 if (expect_false (ev_is_active (w)))
1623 return; 3707 return;
1624 3708
1625 ((WT)w)->at += mn_now; 3709 ev_at (w) += mn_now;
1626 3710
1627 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3711 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1628 3712
3713 EV_FREQUENT_CHECK;
3714
3715 ++timercnt;
1629 ev_start (EV_A_ (W)w, ++timercnt); 3716 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1630 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 3717 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1631 timers [timercnt - 1] = w; 3718 ANHE_w (timers [ev_active (w)]) = (WT)w;
1632 upheap ((WT *)timers, timercnt - 1); 3719 ANHE_at_cache (timers [ev_active (w)]);
3720 upheap (timers, ev_active (w));
1633 3721
3722 EV_FREQUENT_CHECK;
3723
1634 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3724 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1635} 3725}
1636 3726
1637void noinline 3727void noinline
1638ev_timer_stop (EV_P_ ev_timer *w) 3728ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1639{ 3729{
1640 clear_pending (EV_A_ (W)w); 3730 clear_pending (EV_A_ (W)w);
1641 if (expect_false (!ev_is_active (w))) 3731 if (expect_false (!ev_is_active (w)))
1642 return; 3732 return;
1643 3733
1644 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3734 EV_FREQUENT_CHECK;
1645 3735
1646 { 3736 {
1647 int active = ((W)w)->active; 3737 int active = ev_active (w);
1648 3738
3739 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3740
3741 --timercnt;
3742
1649 if (expect_true (--active < --timercnt)) 3743 if (expect_true (active < timercnt + HEAP0))
1650 { 3744 {
1651 timers [active] = timers [timercnt]; 3745 timers [active] = timers [timercnt + HEAP0];
1652 adjustheap ((WT *)timers, timercnt, active); 3746 adjustheap (timers, timercnt, active);
1653 } 3747 }
1654 } 3748 }
1655 3749
1656 ((WT)w)->at -= mn_now; 3750 ev_at (w) -= mn_now;
1657 3751
1658 ev_stop (EV_A_ (W)w); 3752 ev_stop (EV_A_ (W)w);
3753
3754 EV_FREQUENT_CHECK;
1659} 3755}
1660 3756
1661void noinline 3757void noinline
1662ev_timer_again (EV_P_ ev_timer *w) 3758ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1663{ 3759{
3760 EV_FREQUENT_CHECK;
3761
3762 clear_pending (EV_A_ (W)w);
3763
1664 if (ev_is_active (w)) 3764 if (ev_is_active (w))
1665 { 3765 {
1666 if (w->repeat) 3766 if (w->repeat)
1667 { 3767 {
1668 ((WT)w)->at = mn_now + w->repeat; 3768 ev_at (w) = mn_now + w->repeat;
3769 ANHE_at_cache (timers [ev_active (w)]);
1669 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3770 adjustheap (timers, timercnt, ev_active (w));
1670 } 3771 }
1671 else 3772 else
1672 ev_timer_stop (EV_A_ w); 3773 ev_timer_stop (EV_A_ w);
1673 } 3774 }
1674 else if (w->repeat) 3775 else if (w->repeat)
1675 { 3776 {
1676 w->at = w->repeat; 3777 ev_at (w) = w->repeat;
1677 ev_timer_start (EV_A_ w); 3778 ev_timer_start (EV_A_ w);
1678 } 3779 }
3780
3781 EV_FREQUENT_CHECK;
3782}
3783
3784ev_tstamp
3785ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3786{
3787 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1679} 3788}
1680 3789
1681#if EV_PERIODIC_ENABLE 3790#if EV_PERIODIC_ENABLE
1682void noinline 3791void noinline
1683ev_periodic_start (EV_P_ ev_periodic *w) 3792ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1684{ 3793{
1685 if (expect_false (ev_is_active (w))) 3794 if (expect_false (ev_is_active (w)))
1686 return; 3795 return;
1687 3796
1688 if (w->reschedule_cb) 3797 if (w->reschedule_cb)
1689 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3798 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1690 else if (w->interval) 3799 else if (w->interval)
1691 { 3800 {
1692 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3801 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1693 /* this formula differs from the one in periodic_reify because we do not always round up */ 3802 periodic_recalc (EV_A_ w);
1694 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1695 } 3803 }
3804 else
3805 ev_at (w) = w->offset;
1696 3806
3807 EV_FREQUENT_CHECK;
3808
3809 ++periodiccnt;
1697 ev_start (EV_A_ (W)w, ++periodiccnt); 3810 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1698 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3811 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1699 periodics [periodiccnt - 1] = w; 3812 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1700 upheap ((WT *)periodics, periodiccnt - 1); 3813 ANHE_at_cache (periodics [ev_active (w)]);
3814 upheap (periodics, ev_active (w));
1701 3815
3816 EV_FREQUENT_CHECK;
3817
1702 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3818 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1703} 3819}
1704 3820
1705void noinline 3821void noinline
1706ev_periodic_stop (EV_P_ ev_periodic *w) 3822ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1707{ 3823{
1708 clear_pending (EV_A_ (W)w); 3824 clear_pending (EV_A_ (W)w);
1709 if (expect_false (!ev_is_active (w))) 3825 if (expect_false (!ev_is_active (w)))
1710 return; 3826 return;
1711 3827
1712 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3828 EV_FREQUENT_CHECK;
1713 3829
1714 { 3830 {
1715 int active = ((W)w)->active; 3831 int active = ev_active (w);
1716 3832
3833 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3834
3835 --periodiccnt;
3836
1717 if (expect_true (--active < --periodiccnt)) 3837 if (expect_true (active < periodiccnt + HEAP0))
1718 { 3838 {
1719 periodics [active] = periodics [periodiccnt]; 3839 periodics [active] = periodics [periodiccnt + HEAP0];
1720 adjustheap ((WT *)periodics, periodiccnt, active); 3840 adjustheap (periodics, periodiccnt, active);
1721 } 3841 }
1722 } 3842 }
1723 3843
1724 ev_stop (EV_A_ (W)w); 3844 ev_stop (EV_A_ (W)w);
3845
3846 EV_FREQUENT_CHECK;
1725} 3847}
1726 3848
1727void noinline 3849void noinline
1728ev_periodic_again (EV_P_ ev_periodic *w) 3850ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1729{ 3851{
1730 /* TODO: use adjustheap and recalculation */ 3852 /* TODO: use adjustheap and recalculation */
1731 ev_periodic_stop (EV_A_ w); 3853 ev_periodic_stop (EV_A_ w);
1732 ev_periodic_start (EV_A_ w); 3854 ev_periodic_start (EV_A_ w);
1733} 3855}
… …
1735 3857
1736#ifndef SA_RESTART 3858#ifndef SA_RESTART
1737# define SA_RESTART 0 3859# define SA_RESTART 0
1738#endif 3860#endif
1739 3861
3862#if EV_SIGNAL_ENABLE
3863
1740void noinline 3864void noinline
1741ev_signal_start (EV_P_ ev_signal *w) 3865ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1742{ 3866{
1743#if EV_MULTIPLICITY
1744 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1745#endif
1746 if (expect_false (ev_is_active (w))) 3867 if (expect_false (ev_is_active (w)))
1747 return; 3868 return;
1748 3869
1749 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3870 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3871
3872#if EV_MULTIPLICITY
3873 assert (("libev: a signal must not be attached to two different loops",
3874 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3875
3876 signals [w->signum - 1].loop = EV_A;
3877 ECB_MEMORY_FENCE_RELEASE;
3878#endif
3879
3880 EV_FREQUENT_CHECK;
3881
3882#if EV_USE_SIGNALFD
3883 if (sigfd == -2)
3884 {
3885 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3886 if (sigfd < 0 && errno == EINVAL)
3887 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3888
3889 if (sigfd >= 0)
3890 {
3891 fd_intern (sigfd); /* doing it twice will not hurt */
3892
3893 sigemptyset (&sigfd_set);
3894
3895 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3896 ev_set_priority (&sigfd_w, EV_MAXPRI);
3897 ev_io_start (EV_A_ &sigfd_w);
3898 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3899 }
3900 }
3901
3902 if (sigfd >= 0)
3903 {
3904 /* TODO: check .head */
3905 sigaddset (&sigfd_set, w->signum);
3906 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3907
3908 signalfd (sigfd, &sigfd_set, 0);
3909 }
3910#endif
1750 3911
1751 ev_start (EV_A_ (W)w, 1); 3912 ev_start (EV_A_ (W)w, 1);
1752 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1753 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3913 wlist_add (&signals [w->signum - 1].head, (WL)w);
1754 3914
1755 if (!((WL)w)->next) 3915 if (!((WL)w)->next)
3916# if EV_USE_SIGNALFD
3917 if (sigfd < 0) /*TODO*/
3918# endif
1756 { 3919 {
1757#if _WIN32 3920# ifdef _WIN32
3921 evpipe_init (EV_A);
3922
1758 signal (w->signum, sighandler); 3923 signal (w->signum, ev_sighandler);
1759#else 3924# else
1760 struct sigaction sa; 3925 struct sigaction sa;
3926
3927 evpipe_init (EV_A);
3928
1761 sa.sa_handler = sighandler; 3929 sa.sa_handler = ev_sighandler;
1762 sigfillset (&sa.sa_mask); 3930 sigfillset (&sa.sa_mask);
1763 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3931 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1764 sigaction (w->signum, &sa, 0); 3932 sigaction (w->signum, &sa, 0);
3933
3934 if (origflags & EVFLAG_NOSIGMASK)
3935 {
3936 sigemptyset (&sa.sa_mask);
3937 sigaddset (&sa.sa_mask, w->signum);
3938 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3939 }
1765#endif 3940#endif
1766 } 3941 }
3942
3943 EV_FREQUENT_CHECK;
1767} 3944}
1768 3945
1769void noinline 3946void noinline
1770ev_signal_stop (EV_P_ ev_signal *w) 3947ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1771{ 3948{
1772 clear_pending (EV_A_ (W)w); 3949 clear_pending (EV_A_ (W)w);
1773 if (expect_false (!ev_is_active (w))) 3950 if (expect_false (!ev_is_active (w)))
1774 return; 3951 return;
1775 3952
3953 EV_FREQUENT_CHECK;
3954
1776 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3955 wlist_del (&signals [w->signum - 1].head, (WL)w);
1777 ev_stop (EV_A_ (W)w); 3956 ev_stop (EV_A_ (W)w);
1778 3957
1779 if (!signals [w->signum - 1].head) 3958 if (!signals [w->signum - 1].head)
3959 {
3960#if EV_MULTIPLICITY
3961 signals [w->signum - 1].loop = 0; /* unattach from signal */
3962#endif
3963#if EV_USE_SIGNALFD
3964 if (sigfd >= 0)
3965 {
3966 sigset_t ss;
3967
3968 sigemptyset (&ss);
3969 sigaddset (&ss, w->signum);
3970 sigdelset (&sigfd_set, w->signum);
3971
3972 signalfd (sigfd, &sigfd_set, 0);
3973 sigprocmask (SIG_UNBLOCK, &ss, 0);
3974 }
3975 else
3976#endif
1780 signal (w->signum, SIG_DFL); 3977 signal (w->signum, SIG_DFL);
3978 }
3979
3980 EV_FREQUENT_CHECK;
1781} 3981}
3982
3983#endif
3984
3985#if EV_CHILD_ENABLE
1782 3986
1783void 3987void
1784ev_child_start (EV_P_ ev_child *w) 3988ev_child_start (EV_P_ ev_child *w) EV_THROW
1785{ 3989{
1786#if EV_MULTIPLICITY 3990#if EV_MULTIPLICITY
1787 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3991 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1788#endif 3992#endif
1789 if (expect_false (ev_is_active (w))) 3993 if (expect_false (ev_is_active (w)))
1790 return; 3994 return;
1791 3995
3996 EV_FREQUENT_CHECK;
3997
1792 ev_start (EV_A_ (W)w, 1); 3998 ev_start (EV_A_ (W)w, 1);
1793 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3999 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4000
4001 EV_FREQUENT_CHECK;
1794} 4002}
1795 4003
1796void 4004void
1797ev_child_stop (EV_P_ ev_child *w) 4005ev_child_stop (EV_P_ ev_child *w) EV_THROW
1798{ 4006{
1799 clear_pending (EV_A_ (W)w); 4007 clear_pending (EV_A_ (W)w);
1800 if (expect_false (!ev_is_active (w))) 4008 if (expect_false (!ev_is_active (w)))
1801 return; 4009 return;
1802 4010
4011 EV_FREQUENT_CHECK;
4012
1803 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4013 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1804 ev_stop (EV_A_ (W)w); 4014 ev_stop (EV_A_ (W)w);
4015
4016 EV_FREQUENT_CHECK;
1805} 4017}
4018
4019#endif
1806 4020
1807#if EV_STAT_ENABLE 4021#if EV_STAT_ENABLE
1808 4022
1809# ifdef _WIN32 4023# ifdef _WIN32
1810# undef lstat 4024# undef lstat
1811# define lstat(a,b) _stati64 (a,b) 4025# define lstat(a,b) _stati64 (a,b)
1812# endif 4026# endif
1813 4027
1814#define DEF_STAT_INTERVAL 5.0074891 4028#define DEF_STAT_INTERVAL 5.0074891
4029#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1815#define MIN_STAT_INTERVAL 0.1074891 4030#define MIN_STAT_INTERVAL 0.1074891
1816 4031
1817static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4032static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1818 4033
1819#if EV_USE_INOTIFY 4034#if EV_USE_INOTIFY
1820# define EV_INOTIFY_BUFSIZE 8192 4035
4036/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4037# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1821 4038
1822static void noinline 4039static void noinline
1823infy_add (EV_P_ ev_stat *w) 4040infy_add (EV_P_ ev_stat *w)
1824{ 4041{
1825 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); 4042 w->wd = inotify_add_watch (fs_fd, w->path,
4043 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4044 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4045 | IN_DONT_FOLLOW | IN_MASK_ADD);
1826 4046
1827 if (w->wd < 0) 4047 if (w->wd >= 0)
4048 {
4049 struct statfs sfs;
4050
4051 /* now local changes will be tracked by inotify, but remote changes won't */
4052 /* unless the filesystem is known to be local, we therefore still poll */
4053 /* also do poll on <2.6.25, but with normal frequency */
4054
4055 if (!fs_2625)
4056 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4057 else if (!statfs (w->path, &sfs)
4058 && (sfs.f_type == 0x1373 /* devfs */
4059 || sfs.f_type == 0x4006 /* fat */
4060 || sfs.f_type == 0x4d44 /* msdos */
4061 || sfs.f_type == 0xEF53 /* ext2/3 */
4062 || sfs.f_type == 0x72b6 /* jffs2 */
4063 || sfs.f_type == 0x858458f6 /* ramfs */
4064 || sfs.f_type == 0x5346544e /* ntfs */
4065 || sfs.f_type == 0x3153464a /* jfs */
4066 || sfs.f_type == 0x9123683e /* btrfs */
4067 || sfs.f_type == 0x52654973 /* reiser3 */
4068 || sfs.f_type == 0x01021994 /* tmpfs */
4069 || sfs.f_type == 0x58465342 /* xfs */))
4070 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4071 else
4072 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1828 { 4073 }
1829 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4074 else
4075 {
4076 /* can't use inotify, continue to stat */
4077 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1830 4078
1831 /* monitor some parent directory for speedup hints */ 4079 /* if path is not there, monitor some parent directory for speedup hints */
4080 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4081 /* but an efficiency issue only */
1832 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4082 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1833 { 4083 {
1834 char path [4096]; 4084 char path [4096];
1835 strcpy (path, w->path); 4085 strcpy (path, w->path);
1836 4086
… …
1839 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4089 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1840 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4090 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1841 4091
1842 char *pend = strrchr (path, '/'); 4092 char *pend = strrchr (path, '/');
1843 4093
1844 if (!pend) 4094 if (!pend || pend == path)
1845 break; /* whoops, no '/', complain to your admin */ 4095 break;
1846 4096
1847 *pend = 0; 4097 *pend = 0;
1848 w->wd = inotify_add_watch (fs_fd, path, mask); 4098 w->wd = inotify_add_watch (fs_fd, path, mask);
1849 } 4099 }
1850 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4100 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1851 } 4101 }
1852 } 4102 }
1853 else
1854 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1855 4103
1856 if (w->wd >= 0) 4104 if (w->wd >= 0)
1857 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4105 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4106
4107 /* now re-arm timer, if required */
4108 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4109 ev_timer_again (EV_A_ &w->timer);
4110 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1858} 4111}
1859 4112
1860static void noinline 4113static void noinline
1861infy_del (EV_P_ ev_stat *w) 4114infy_del (EV_P_ ev_stat *w)
1862{ 4115{
… …
1865 4118
1866 if (wd < 0) 4119 if (wd < 0)
1867 return; 4120 return;
1868 4121
1869 w->wd = -2; 4122 w->wd = -2;
1870 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4123 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1871 wlist_del (&fs_hash [slot].head, (WL)w); 4124 wlist_del (&fs_hash [slot].head, (WL)w);
1872 4125
1873 /* remove this watcher, if others are watching it, they will rearm */ 4126 /* remove this watcher, if others are watching it, they will rearm */
1874 inotify_rm_watch (fs_fd, wd); 4127 inotify_rm_watch (fs_fd, wd);
1875} 4128}
1876 4129
1877static void noinline 4130static void noinline
1878infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4131infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1879{ 4132{
1880 if (slot < 0) 4133 if (slot < 0)
1881 /* overflow, need to check for all hahs slots */ 4134 /* overflow, need to check for all hash slots */
1882 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4135 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1883 infy_wd (EV_A_ slot, wd, ev); 4136 infy_wd (EV_A_ slot, wd, ev);
1884 else 4137 else
1885 { 4138 {
1886 WL w_; 4139 WL w_;
1887 4140
1888 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4141 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1889 { 4142 {
1890 ev_stat *w = (ev_stat *)w_; 4143 ev_stat *w = (ev_stat *)w_;
1891 w_ = w_->next; /* lets us remove this watcher and all before it */ 4144 w_ = w_->next; /* lets us remove this watcher and all before it */
1892 4145
1893 if (w->wd == wd || wd == -1) 4146 if (w->wd == wd || wd == -1)
1894 { 4147 {
1895 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4148 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1896 { 4149 {
4150 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1897 w->wd = -1; 4151 w->wd = -1;
1898 infy_add (EV_A_ w); /* re-add, no matter what */ 4152 infy_add (EV_A_ w); /* re-add, no matter what */
1899 } 4153 }
1900 4154
1901 stat_timer_cb (EV_A_ &w->timer, 0); 4155 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1906 4160
1907static void 4161static void
1908infy_cb (EV_P_ ev_io *w, int revents) 4162infy_cb (EV_P_ ev_io *w, int revents)
1909{ 4163{
1910 char buf [EV_INOTIFY_BUFSIZE]; 4164 char buf [EV_INOTIFY_BUFSIZE];
1911 struct inotify_event *ev = (struct inotify_event *)buf;
1912 int ofs; 4165 int ofs;
1913 int len = read (fs_fd, buf, sizeof (buf)); 4166 int len = read (fs_fd, buf, sizeof (buf));
1914 4167
1915 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4168 for (ofs = 0; ofs < len; )
4169 {
4170 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1916 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4171 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4172 ofs += sizeof (struct inotify_event) + ev->len;
4173 }
1917} 4174}
1918 4175
1919void inline_size 4176inline_size void ecb_cold
4177ev_check_2625 (EV_P)
4178{
4179 /* kernels < 2.6.25 are borked
4180 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4181 */
4182 if (ev_linux_version () < 0x020619)
4183 return;
4184
4185 fs_2625 = 1;
4186}
4187
4188inline_size int
4189infy_newfd (void)
4190{
4191#if defined IN_CLOEXEC && defined IN_NONBLOCK
4192 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4193 if (fd >= 0)
4194 return fd;
4195#endif
4196 return inotify_init ();
4197}
4198
4199inline_size void
1920infy_init (EV_P) 4200infy_init (EV_P)
1921{ 4201{
1922 if (fs_fd != -2) 4202 if (fs_fd != -2)
1923 return; 4203 return;
1924 4204
4205 fs_fd = -1;
4206
4207 ev_check_2625 (EV_A);
4208
1925 fs_fd = inotify_init (); 4209 fs_fd = infy_newfd ();
1926 4210
1927 if (fs_fd >= 0) 4211 if (fs_fd >= 0)
1928 { 4212 {
4213 fd_intern (fs_fd);
1929 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4214 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1930 ev_set_priority (&fs_w, EV_MAXPRI); 4215 ev_set_priority (&fs_w, EV_MAXPRI);
1931 ev_io_start (EV_A_ &fs_w); 4216 ev_io_start (EV_A_ &fs_w);
4217 ev_unref (EV_A);
1932 } 4218 }
1933} 4219}
1934 4220
1935void inline_size 4221inline_size void
1936infy_fork (EV_P) 4222infy_fork (EV_P)
1937{ 4223{
1938 int slot; 4224 int slot;
1939 4225
1940 if (fs_fd < 0) 4226 if (fs_fd < 0)
1941 return; 4227 return;
1942 4228
4229 ev_ref (EV_A);
4230 ev_io_stop (EV_A_ &fs_w);
1943 close (fs_fd); 4231 close (fs_fd);
1944 fs_fd = inotify_init (); 4232 fs_fd = infy_newfd ();
1945 4233
4234 if (fs_fd >= 0)
4235 {
4236 fd_intern (fs_fd);
4237 ev_io_set (&fs_w, fs_fd, EV_READ);
4238 ev_io_start (EV_A_ &fs_w);
4239 ev_unref (EV_A);
4240 }
4241
1946 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4242 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1947 { 4243 {
1948 WL w_ = fs_hash [slot].head; 4244 WL w_ = fs_hash [slot].head;
1949 fs_hash [slot].head = 0; 4245 fs_hash [slot].head = 0;
1950 4246
1951 while (w_) 4247 while (w_)
… …
1956 w->wd = -1; 4252 w->wd = -1;
1957 4253
1958 if (fs_fd >= 0) 4254 if (fs_fd >= 0)
1959 infy_add (EV_A_ w); /* re-add, no matter what */ 4255 infy_add (EV_A_ w); /* re-add, no matter what */
1960 else 4256 else
4257 {
4258 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4259 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1961 ev_timer_start (EV_A_ &w->timer); 4260 ev_timer_again (EV_A_ &w->timer);
4261 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4262 }
1962 } 4263 }
1963
1964 } 4264 }
1965} 4265}
1966 4266
4267#endif
4268
4269#ifdef _WIN32
4270# define EV_LSTAT(p,b) _stati64 (p, b)
4271#else
4272# define EV_LSTAT(p,b) lstat (p, b)
1967#endif 4273#endif
1968 4274
1969void 4275void
1970ev_stat_stat (EV_P_ ev_stat *w) 4276ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1971{ 4277{
1972 if (lstat (w->path, &w->attr) < 0) 4278 if (lstat (w->path, &w->attr) < 0)
1973 w->attr.st_nlink = 0; 4279 w->attr.st_nlink = 0;
1974 else if (!w->attr.st_nlink) 4280 else if (!w->attr.st_nlink)
1975 w->attr.st_nlink = 1; 4281 w->attr.st_nlink = 1;
… …
1978static void noinline 4284static void noinline
1979stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4285stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1980{ 4286{
1981 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4287 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1982 4288
1983 /* we copy this here each the time so that */ 4289 ev_statdata prev = w->attr;
1984 /* prev has the old value when the callback gets invoked */
1985 w->prev = w->attr;
1986 ev_stat_stat (EV_A_ w); 4290 ev_stat_stat (EV_A_ w);
1987 4291
1988 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4292 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1989 if ( 4293 if (
1990 w->prev.st_dev != w->attr.st_dev 4294 prev.st_dev != w->attr.st_dev
1991 || w->prev.st_ino != w->attr.st_ino 4295 || prev.st_ino != w->attr.st_ino
1992 || w->prev.st_mode != w->attr.st_mode 4296 || prev.st_mode != w->attr.st_mode
1993 || w->prev.st_nlink != w->attr.st_nlink 4297 || prev.st_nlink != w->attr.st_nlink
1994 || w->prev.st_uid != w->attr.st_uid 4298 || prev.st_uid != w->attr.st_uid
1995 || w->prev.st_gid != w->attr.st_gid 4299 || prev.st_gid != w->attr.st_gid
1996 || w->prev.st_rdev != w->attr.st_rdev 4300 || prev.st_rdev != w->attr.st_rdev
1997 || w->prev.st_size != w->attr.st_size 4301 || prev.st_size != w->attr.st_size
1998 || w->prev.st_atime != w->attr.st_atime 4302 || prev.st_atime != w->attr.st_atime
1999 || w->prev.st_mtime != w->attr.st_mtime 4303 || prev.st_mtime != w->attr.st_mtime
2000 || w->prev.st_ctime != w->attr.st_ctime 4304 || prev.st_ctime != w->attr.st_ctime
2001 ) { 4305 ) {
4306 /* we only update w->prev on actual differences */
4307 /* in case we test more often than invoke the callback, */
4308 /* to ensure that prev is always different to attr */
4309 w->prev = prev;
4310
2002 #if EV_USE_INOTIFY 4311 #if EV_USE_INOTIFY
4312 if (fs_fd >= 0)
4313 {
2003 infy_del (EV_A_ w); 4314 infy_del (EV_A_ w);
2004 infy_add (EV_A_ w); 4315 infy_add (EV_A_ w);
2005 ev_stat_stat (EV_A_ w); /* avoid race... */ 4316 ev_stat_stat (EV_A_ w); /* avoid race... */
4317 }
2006 #endif 4318 #endif
2007 4319
2008 ev_feed_event (EV_A_ w, EV_STAT); 4320 ev_feed_event (EV_A_ w, EV_STAT);
2009 } 4321 }
2010} 4322}
2011 4323
2012void 4324void
2013ev_stat_start (EV_P_ ev_stat *w) 4325ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2014{ 4326{
2015 if (expect_false (ev_is_active (w))) 4327 if (expect_false (ev_is_active (w)))
2016 return; 4328 return;
2017 4329
2018 /* since we use memcmp, we need to clear any padding data etc. */
2019 memset (&w->prev, 0, sizeof (ev_statdata));
2020 memset (&w->attr, 0, sizeof (ev_statdata));
2021
2022 ev_stat_stat (EV_A_ w); 4330 ev_stat_stat (EV_A_ w);
2023 4331
4332 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2024 if (w->interval < MIN_STAT_INTERVAL) 4333 w->interval = MIN_STAT_INTERVAL;
2025 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2026 4334
2027 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4335 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2028 ev_set_priority (&w->timer, ev_priority (w)); 4336 ev_set_priority (&w->timer, ev_priority (w));
2029 4337
2030#if EV_USE_INOTIFY 4338#if EV_USE_INOTIFY
2031 infy_init (EV_A); 4339 infy_init (EV_A);
2032 4340
2033 if (fs_fd >= 0) 4341 if (fs_fd >= 0)
2034 infy_add (EV_A_ w); 4342 infy_add (EV_A_ w);
2035 else 4343 else
2036#endif 4344#endif
4345 {
2037 ev_timer_start (EV_A_ &w->timer); 4346 ev_timer_again (EV_A_ &w->timer);
4347 ev_unref (EV_A);
4348 }
2038 4349
2039 ev_start (EV_A_ (W)w, 1); 4350 ev_start (EV_A_ (W)w, 1);
4351
4352 EV_FREQUENT_CHECK;
2040} 4353}
2041 4354
2042void 4355void
2043ev_stat_stop (EV_P_ ev_stat *w) 4356ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2044{ 4357{
2045 clear_pending (EV_A_ (W)w); 4358 clear_pending (EV_A_ (W)w);
2046 if (expect_false (!ev_is_active (w))) 4359 if (expect_false (!ev_is_active (w)))
2047 return; 4360 return;
2048 4361
4362 EV_FREQUENT_CHECK;
4363
2049#if EV_USE_INOTIFY 4364#if EV_USE_INOTIFY
2050 infy_del (EV_A_ w); 4365 infy_del (EV_A_ w);
2051#endif 4366#endif
4367
4368 if (ev_is_active (&w->timer))
4369 {
4370 ev_ref (EV_A);
2052 ev_timer_stop (EV_A_ &w->timer); 4371 ev_timer_stop (EV_A_ &w->timer);
4372 }
2053 4373
2054 ev_stop (EV_A_ (W)w); 4374 ev_stop (EV_A_ (W)w);
4375
4376 EV_FREQUENT_CHECK;
2055} 4377}
2056#endif 4378#endif
2057 4379
2058#if EV_IDLE_ENABLE 4380#if EV_IDLE_ENABLE
2059void 4381void
2060ev_idle_start (EV_P_ ev_idle *w) 4382ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2061{ 4383{
2062 if (expect_false (ev_is_active (w))) 4384 if (expect_false (ev_is_active (w)))
2063 return; 4385 return;
2064 4386
2065 pri_adjust (EV_A_ (W)w); 4387 pri_adjust (EV_A_ (W)w);
4388
4389 EV_FREQUENT_CHECK;
2066 4390
2067 { 4391 {
2068 int active = ++idlecnt [ABSPRI (w)]; 4392 int active = ++idlecnt [ABSPRI (w)];
2069 4393
2070 ++idleall; 4394 ++idleall;
2071 ev_start (EV_A_ (W)w, active); 4395 ev_start (EV_A_ (W)w, active);
2072 4396
2073 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4397 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2074 idles [ABSPRI (w)][active - 1] = w; 4398 idles [ABSPRI (w)][active - 1] = w;
2075 } 4399 }
4400
4401 EV_FREQUENT_CHECK;
2076} 4402}
2077 4403
2078void 4404void
2079ev_idle_stop (EV_P_ ev_idle *w) 4405ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2080{ 4406{
2081 clear_pending (EV_A_ (W)w); 4407 clear_pending (EV_A_ (W)w);
2082 if (expect_false (!ev_is_active (w))) 4408 if (expect_false (!ev_is_active (w)))
2083 return; 4409 return;
2084 4410
4411 EV_FREQUENT_CHECK;
4412
2085 { 4413 {
2086 int active = ((W)w)->active; 4414 int active = ev_active (w);
2087 4415
2088 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4416 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2089 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4417 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2090 4418
2091 ev_stop (EV_A_ (W)w); 4419 ev_stop (EV_A_ (W)w);
2092 --idleall; 4420 --idleall;
2093 } 4421 }
2094}
2095#endif
2096 4422
4423 EV_FREQUENT_CHECK;
4424}
4425#endif
4426
4427#if EV_PREPARE_ENABLE
2097void 4428void
2098ev_prepare_start (EV_P_ ev_prepare *w) 4429ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2099{ 4430{
2100 if (expect_false (ev_is_active (w))) 4431 if (expect_false (ev_is_active (w)))
2101 return; 4432 return;
4433
4434 EV_FREQUENT_CHECK;
2102 4435
2103 ev_start (EV_A_ (W)w, ++preparecnt); 4436 ev_start (EV_A_ (W)w, ++preparecnt);
2104 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4437 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2105 prepares [preparecnt - 1] = w; 4438 prepares [preparecnt - 1] = w;
4439
4440 EV_FREQUENT_CHECK;
2106} 4441}
2107 4442
2108void 4443void
2109ev_prepare_stop (EV_P_ ev_prepare *w) 4444ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2110{ 4445{
2111 clear_pending (EV_A_ (W)w); 4446 clear_pending (EV_A_ (W)w);
2112 if (expect_false (!ev_is_active (w))) 4447 if (expect_false (!ev_is_active (w)))
2113 return; 4448 return;
2114 4449
4450 EV_FREQUENT_CHECK;
4451
2115 { 4452 {
2116 int active = ((W)w)->active; 4453 int active = ev_active (w);
4454
2117 prepares [active - 1] = prepares [--preparecnt]; 4455 prepares [active - 1] = prepares [--preparecnt];
2118 ((W)prepares [active - 1])->active = active; 4456 ev_active (prepares [active - 1]) = active;
2119 } 4457 }
2120 4458
2121 ev_stop (EV_A_ (W)w); 4459 ev_stop (EV_A_ (W)w);
2122}
2123 4460
4461 EV_FREQUENT_CHECK;
4462}
4463#endif
4464
4465#if EV_CHECK_ENABLE
2124void 4466void
2125ev_check_start (EV_P_ ev_check *w) 4467ev_check_start (EV_P_ ev_check *w) EV_THROW
2126{ 4468{
2127 if (expect_false (ev_is_active (w))) 4469 if (expect_false (ev_is_active (w)))
2128 return; 4470 return;
4471
4472 EV_FREQUENT_CHECK;
2129 4473
2130 ev_start (EV_A_ (W)w, ++checkcnt); 4474 ev_start (EV_A_ (W)w, ++checkcnt);
2131 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4475 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2132 checks [checkcnt - 1] = w; 4476 checks [checkcnt - 1] = w;
4477
4478 EV_FREQUENT_CHECK;
2133} 4479}
2134 4480
2135void 4481void
2136ev_check_stop (EV_P_ ev_check *w) 4482ev_check_stop (EV_P_ ev_check *w) EV_THROW
2137{ 4483{
2138 clear_pending (EV_A_ (W)w); 4484 clear_pending (EV_A_ (W)w);
2139 if (expect_false (!ev_is_active (w))) 4485 if (expect_false (!ev_is_active (w)))
2140 return; 4486 return;
2141 4487
4488 EV_FREQUENT_CHECK;
4489
2142 { 4490 {
2143 int active = ((W)w)->active; 4491 int active = ev_active (w);
4492
2144 checks [active - 1] = checks [--checkcnt]; 4493 checks [active - 1] = checks [--checkcnt];
2145 ((W)checks [active - 1])->active = active; 4494 ev_active (checks [active - 1]) = active;
2146 } 4495 }
2147 4496
2148 ev_stop (EV_A_ (W)w); 4497 ev_stop (EV_A_ (W)w);
4498
4499 EV_FREQUENT_CHECK;
2149} 4500}
4501#endif
2150 4502
2151#if EV_EMBED_ENABLE 4503#if EV_EMBED_ENABLE
2152void noinline 4504void noinline
2153ev_embed_sweep (EV_P_ ev_embed *w) 4505ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2154{ 4506{
2155 ev_loop (w->loop, EVLOOP_NONBLOCK); 4507 ev_run (w->other, EVRUN_NOWAIT);
2156} 4508}
2157 4509
2158static void 4510static void
2159embed_cb (EV_P_ ev_io *io, int revents) 4511embed_io_cb (EV_P_ ev_io *io, int revents)
2160{ 4512{
2161 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4513 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2162 4514
2163 if (ev_cb (w)) 4515 if (ev_cb (w))
2164 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4516 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2165 else 4517 else
2166 ev_embed_sweep (loop, w); 4518 ev_run (w->other, EVRUN_NOWAIT);
2167} 4519}
4520
4521static void
4522embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4523{
4524 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4525
4526 {
4527 EV_P = w->other;
4528
4529 while (fdchangecnt)
4530 {
4531 fd_reify (EV_A);
4532 ev_run (EV_A_ EVRUN_NOWAIT);
4533 }
4534 }
4535}
4536
4537static void
4538embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4539{
4540 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4541
4542 ev_embed_stop (EV_A_ w);
4543
4544 {
4545 EV_P = w->other;
4546
4547 ev_loop_fork (EV_A);
4548 ev_run (EV_A_ EVRUN_NOWAIT);
4549 }
4550
4551 ev_embed_start (EV_A_ w);
4552}
4553
4554#if 0
4555static void
4556embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4557{
4558 ev_idle_stop (EV_A_ idle);
4559}
4560#endif
2168 4561
2169void 4562void
2170ev_embed_start (EV_P_ ev_embed *w) 4563ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2171{ 4564{
2172 if (expect_false (ev_is_active (w))) 4565 if (expect_false (ev_is_active (w)))
2173 return; 4566 return;
2174 4567
2175 { 4568 {
2176 struct ev_loop *loop = w->loop; 4569 EV_P = w->other;
2177 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4570 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2178 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4571 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2179 } 4572 }
4573
4574 EV_FREQUENT_CHECK;
2180 4575
2181 ev_set_priority (&w->io, ev_priority (w)); 4576 ev_set_priority (&w->io, ev_priority (w));
2182 ev_io_start (EV_A_ &w->io); 4577 ev_io_start (EV_A_ &w->io);
2183 4578
4579 ev_prepare_init (&w->prepare, embed_prepare_cb);
4580 ev_set_priority (&w->prepare, EV_MINPRI);
4581 ev_prepare_start (EV_A_ &w->prepare);
4582
4583 ev_fork_init (&w->fork, embed_fork_cb);
4584 ev_fork_start (EV_A_ &w->fork);
4585
4586 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4587
2184 ev_start (EV_A_ (W)w, 1); 4588 ev_start (EV_A_ (W)w, 1);
4589
4590 EV_FREQUENT_CHECK;
2185} 4591}
2186 4592
2187void 4593void
2188ev_embed_stop (EV_P_ ev_embed *w) 4594ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2189{ 4595{
2190 clear_pending (EV_A_ (W)w); 4596 clear_pending (EV_A_ (W)w);
2191 if (expect_false (!ev_is_active (w))) 4597 if (expect_false (!ev_is_active (w)))
2192 return; 4598 return;
2193 4599
4600 EV_FREQUENT_CHECK;
4601
2194 ev_io_stop (EV_A_ &w->io); 4602 ev_io_stop (EV_A_ &w->io);
4603 ev_prepare_stop (EV_A_ &w->prepare);
4604 ev_fork_stop (EV_A_ &w->fork);
2195 4605
2196 ev_stop (EV_A_ (W)w); 4606 ev_stop (EV_A_ (W)w);
4607
4608 EV_FREQUENT_CHECK;
2197} 4609}
2198#endif 4610#endif
2199 4611
2200#if EV_FORK_ENABLE 4612#if EV_FORK_ENABLE
2201void 4613void
2202ev_fork_start (EV_P_ ev_fork *w) 4614ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2203{ 4615{
2204 if (expect_false (ev_is_active (w))) 4616 if (expect_false (ev_is_active (w)))
2205 return; 4617 return;
4618
4619 EV_FREQUENT_CHECK;
2206 4620
2207 ev_start (EV_A_ (W)w, ++forkcnt); 4621 ev_start (EV_A_ (W)w, ++forkcnt);
2208 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4622 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2209 forks [forkcnt - 1] = w; 4623 forks [forkcnt - 1] = w;
4624
4625 EV_FREQUENT_CHECK;
2210} 4626}
2211 4627
2212void 4628void
2213ev_fork_stop (EV_P_ ev_fork *w) 4629ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2214{ 4630{
2215 clear_pending (EV_A_ (W)w); 4631 clear_pending (EV_A_ (W)w);
2216 if (expect_false (!ev_is_active (w))) 4632 if (expect_false (!ev_is_active (w)))
2217 return; 4633 return;
2218 4634
4635 EV_FREQUENT_CHECK;
4636
2219 { 4637 {
2220 int active = ((W)w)->active; 4638 int active = ev_active (w);
4639
2221 forks [active - 1] = forks [--forkcnt]; 4640 forks [active - 1] = forks [--forkcnt];
2222 ((W)forks [active - 1])->active = active; 4641 ev_active (forks [active - 1]) = active;
2223 } 4642 }
2224 4643
2225 ev_stop (EV_A_ (W)w); 4644 ev_stop (EV_A_ (W)w);
4645
4646 EV_FREQUENT_CHECK;
4647}
4648#endif
4649
4650#if EV_CLEANUP_ENABLE
4651void
4652ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4653{
4654 if (expect_false (ev_is_active (w)))
4655 return;
4656
4657 EV_FREQUENT_CHECK;
4658
4659 ev_start (EV_A_ (W)w, ++cleanupcnt);
4660 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4661 cleanups [cleanupcnt - 1] = w;
4662
4663 /* cleanup watchers should never keep a refcount on the loop */
4664 ev_unref (EV_A);
4665 EV_FREQUENT_CHECK;
4666}
4667
4668void
4669ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4670{
4671 clear_pending (EV_A_ (W)w);
4672 if (expect_false (!ev_is_active (w)))
4673 return;
4674
4675 EV_FREQUENT_CHECK;
4676 ev_ref (EV_A);
4677
4678 {
4679 int active = ev_active (w);
4680
4681 cleanups [active - 1] = cleanups [--cleanupcnt];
4682 ev_active (cleanups [active - 1]) = active;
4683 }
4684
4685 ev_stop (EV_A_ (W)w);
4686
4687 EV_FREQUENT_CHECK;
4688}
4689#endif
4690
4691#if EV_ASYNC_ENABLE
4692void
4693ev_async_start (EV_P_ ev_async *w) EV_THROW
4694{
4695 if (expect_false (ev_is_active (w)))
4696 return;
4697
4698 w->sent = 0;
4699
4700 evpipe_init (EV_A);
4701
4702 EV_FREQUENT_CHECK;
4703
4704 ev_start (EV_A_ (W)w, ++asynccnt);
4705 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4706 asyncs [asynccnt - 1] = w;
4707
4708 EV_FREQUENT_CHECK;
4709}
4710
4711void
4712ev_async_stop (EV_P_ ev_async *w) EV_THROW
4713{
4714 clear_pending (EV_A_ (W)w);
4715 if (expect_false (!ev_is_active (w)))
4716 return;
4717
4718 EV_FREQUENT_CHECK;
4719
4720 {
4721 int active = ev_active (w);
4722
4723 asyncs [active - 1] = asyncs [--asynccnt];
4724 ev_active (asyncs [active - 1]) = active;
4725 }
4726
4727 ev_stop (EV_A_ (W)w);
4728
4729 EV_FREQUENT_CHECK;
4730}
4731
4732void
4733ev_async_send (EV_P_ ev_async *w) EV_THROW
4734{
4735 w->sent = 1;
4736 evpipe_write (EV_A_ &async_pending);
2226} 4737}
2227#endif 4738#endif
2228 4739
2229/*****************************************************************************/ 4740/*****************************************************************************/
2230 4741
… …
2240once_cb (EV_P_ struct ev_once *once, int revents) 4751once_cb (EV_P_ struct ev_once *once, int revents)
2241{ 4752{
2242 void (*cb)(int revents, void *arg) = once->cb; 4753 void (*cb)(int revents, void *arg) = once->cb;
2243 void *arg = once->arg; 4754 void *arg = once->arg;
2244 4755
2245 ev_io_stop (EV_A_ &once->io); 4756 ev_io_stop (EV_A_ &once->io);
2246 ev_timer_stop (EV_A_ &once->to); 4757 ev_timer_stop (EV_A_ &once->to);
2247 ev_free (once); 4758 ev_free (once);
2248 4759
2249 cb (revents, arg); 4760 cb (revents, arg);
2250} 4761}
2251 4762
2252static void 4763static void
2253once_cb_io (EV_P_ ev_io *w, int revents) 4764once_cb_io (EV_P_ ev_io *w, int revents)
2254{ 4765{
2255 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4766 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4767
4768 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2256} 4769}
2257 4770
2258static void 4771static void
2259once_cb_to (EV_P_ ev_timer *w, int revents) 4772once_cb_to (EV_P_ ev_timer *w, int revents)
2260{ 4773{
2261 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4774 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4775
4776 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2262} 4777}
2263 4778
2264void 4779void
2265ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4780ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2266{ 4781{
2267 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4782 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2268 4783
2269 if (expect_false (!once)) 4784 if (expect_false (!once))
2270 { 4785 {
2271 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4786 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2272 return; 4787 return;
2273 } 4788 }
2274 4789
2275 once->cb = cb; 4790 once->cb = cb;
2276 once->arg = arg; 4791 once->arg = arg;
… …
2288 ev_timer_set (&once->to, timeout, 0.); 4803 ev_timer_set (&once->to, timeout, 0.);
2289 ev_timer_start (EV_A_ &once->to); 4804 ev_timer_start (EV_A_ &once->to);
2290 } 4805 }
2291} 4806}
2292 4807
2293#ifdef __cplusplus 4808/*****************************************************************************/
2294} 4809
4810#if EV_WALK_ENABLE
4811void ecb_cold
4812ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4813{
4814 int i, j;
4815 ev_watcher_list *wl, *wn;
4816
4817 if (types & (EV_IO | EV_EMBED))
4818 for (i = 0; i < anfdmax; ++i)
4819 for (wl = anfds [i].head; wl; )
4820 {
4821 wn = wl->next;
4822
4823#if EV_EMBED_ENABLE
4824 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4825 {
4826 if (types & EV_EMBED)
4827 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4828 }
4829 else
4830#endif
4831#if EV_USE_INOTIFY
4832 if (ev_cb ((ev_io *)wl) == infy_cb)
4833 ;
4834 else
4835#endif
4836 if ((ev_io *)wl != &pipe_w)
4837 if (types & EV_IO)
4838 cb (EV_A_ EV_IO, wl);
4839
4840 wl = wn;
4841 }
4842
4843 if (types & (EV_TIMER | EV_STAT))
4844 for (i = timercnt + HEAP0; i-- > HEAP0; )
4845#if EV_STAT_ENABLE
4846 /*TODO: timer is not always active*/
4847 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4848 {
4849 if (types & EV_STAT)
4850 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4851 }
4852 else
4853#endif
4854 if (types & EV_TIMER)
4855 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4856
4857#if EV_PERIODIC_ENABLE
4858 if (types & EV_PERIODIC)
4859 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4860 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4861#endif
4862
4863#if EV_IDLE_ENABLE
4864 if (types & EV_IDLE)
4865 for (j = NUMPRI; j--; )
4866 for (i = idlecnt [j]; i--; )
4867 cb (EV_A_ EV_IDLE, idles [j][i]);
4868#endif
4869
4870#if EV_FORK_ENABLE
4871 if (types & EV_FORK)
4872 for (i = forkcnt; i--; )
4873 if (ev_cb (forks [i]) != embed_fork_cb)
4874 cb (EV_A_ EV_FORK, forks [i]);
4875#endif
4876
4877#if EV_ASYNC_ENABLE
4878 if (types & EV_ASYNC)
4879 for (i = asynccnt; i--; )
4880 cb (EV_A_ EV_ASYNC, asyncs [i]);
4881#endif
4882
4883#if EV_PREPARE_ENABLE
4884 if (types & EV_PREPARE)
4885 for (i = preparecnt; i--; )
4886# if EV_EMBED_ENABLE
4887 if (ev_cb (prepares [i]) != embed_prepare_cb)
2295#endif 4888# endif
4889 cb (EV_A_ EV_PREPARE, prepares [i]);
4890#endif
2296 4891
4892#if EV_CHECK_ENABLE
4893 if (types & EV_CHECK)
4894 for (i = checkcnt; i--; )
4895 cb (EV_A_ EV_CHECK, checks [i]);
4896#endif
4897
4898#if EV_SIGNAL_ENABLE
4899 if (types & EV_SIGNAL)
4900 for (i = 0; i < EV_NSIG - 1; ++i)
4901 for (wl = signals [i].head; wl; )
4902 {
4903 wn = wl->next;
4904 cb (EV_A_ EV_SIGNAL, wl);
4905 wl = wn;
4906 }
4907#endif
4908
4909#if EV_CHILD_ENABLE
4910 if (types & EV_CHILD)
4911 for (i = (EV_PID_HASHSIZE); i--; )
4912 for (wl = childs [i]; wl; )
4913 {
4914 wn = wl->next;
4915 cb (EV_A_ EV_CHILD, wl);
4916 wl = wn;
4917 }
4918#endif
4919/* EV_STAT 0x00001000 /* stat data changed */
4920/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4921}
4922#endif
4923
4924#if EV_MULTIPLICITY
4925 #include "ev_wrap.h"
4926#endif
4927

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