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Comparing libev/ev.c (file contents):
Revision 1.214 by root, Tue Feb 19 19:21:20 2008 UTC vs.
Revision 1.482 by root, Sat Jul 28 04:15:15 2018 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008 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 modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 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 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
41extern "C" {
42#endif
43
44#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
45# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
46# include EV_CONFIG_H 43# include EV_CONFIG_H
47# else 44# else
48# include "config.h" 45# include "config.h"
49# endif 46# endif
50 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
51# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
52# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
53# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
54# endif 71# endif
55# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
57# endif 74# endif
58# else 75# else
59# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
60# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
61# endif 78# endif
62# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
63# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
64# endif 81# endif
65# endif 82# endif
66 83
84# if HAVE_NANOSLEEP
67# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
68# if HAVE_NANOSLEEP
69# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
70# else 88# else
89# undef EV_USE_NANOSLEEP
71# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
73# endif 100# endif
74 101
102# if HAVE_POLL && HAVE_POLL_H
75# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
76# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
77# define EV_USE_SELECT 1
78# else
79# define EV_USE_SELECT 0
80# endif 105# endif
81# endif
82
83# ifndef EV_USE_POLL
84# if HAVE_POLL && HAVE_POLL_H
85# define EV_USE_POLL 1
86# else 106# else
107# undef EV_USE_POLL
87# define EV_USE_POLL 0 108# define EV_USE_POLL 0
88# endif
89# endif 109# endif
90 110
91# ifndef EV_USE_EPOLL
92# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
93# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
94# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
95# define EV_USE_EPOLL 0
96# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
97# endif 118# endif
98 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
99# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
100# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
101# define EV_USE_KQUEUE 1
102# else
103# define EV_USE_KQUEUE 0
104# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
105# endif 127# endif
106 128
107# ifndef EV_USE_PORT
108# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
109# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
110# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
111# define EV_USE_PORT 0
112# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
113# endif 136# endif
114 137
115# ifndef EV_USE_INOTIFY
116# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
117# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
118# else
119# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
120# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
121# endif 145# endif
122 146
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
123#endif 154# endif
124 155
125#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
126#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
127#include <fcntl.h> 169#include <fcntl.h>
128#include <stddef.h> 170#include <stddef.h>
129 171
130#include <stdio.h> 172#include <stdio.h>
131 173
132#include <assert.h> 174#include <assert.h>
133#include <errno.h> 175#include <errno.h>
134#include <sys/types.h> 176#include <sys/types.h>
135#include <time.h> 177#include <time.h>
178#include <limits.h>
136 179
137#include <signal.h> 180#include <signal.h>
138 181
139#ifdef EV_H 182#ifdef EV_H
140# include EV_H 183# include EV_H
141#else 184#else
142# 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
143#endif 197#endif
144 198
145#ifndef _WIN32 199#ifndef _WIN32
146# include <sys/time.h> 200# include <sys/time.h>
147# include <sys/wait.h> 201# include <sys/wait.h>
148# include <unistd.h> 202# include <unistd.h>
149#else 203#else
204# include <io.h>
150# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
151# include <windows.h> 207# include <windows.h>
152# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
153# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
154# 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
155#endif 258# endif
259#endif
156 260
157/**/ 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
158 269
159#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
160# define EV_USE_MONOTONIC 0 274# define EV_USE_MONOTONIC 0
275# endif
161#endif 276#endif
162 277
163#ifndef EV_USE_REALTIME 278#ifndef EV_USE_REALTIME
164# define EV_USE_REALTIME 0 279# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
165#endif 280#endif
166 281
167#ifndef EV_USE_NANOSLEEP 282#ifndef EV_USE_NANOSLEEP
283# if _POSIX_C_SOURCE >= 199309L
284# define EV_USE_NANOSLEEP EV_FEATURE_OS
285# else
168# define EV_USE_NANOSLEEP 0 286# define EV_USE_NANOSLEEP 0
287# endif
169#endif 288#endif
170 289
171#ifndef EV_USE_SELECT 290#ifndef EV_USE_SELECT
172# define EV_USE_SELECT 1 291# define EV_USE_SELECT EV_FEATURE_BACKENDS
173#endif 292#endif
174 293
175#ifndef EV_USE_POLL 294#ifndef EV_USE_POLL
176# ifdef _WIN32 295# ifdef _WIN32
177# define EV_USE_POLL 0 296# define EV_USE_POLL 0
178# else 297# else
179# define EV_USE_POLL 1 298# define EV_USE_POLL EV_FEATURE_BACKENDS
180# endif 299# endif
181#endif 300#endif
182 301
183#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
184# define EV_USE_EPOLL 0 306# define EV_USE_EPOLL 0
307# endif
185#endif 308#endif
186 309
187#ifndef EV_USE_KQUEUE 310#ifndef EV_USE_KQUEUE
188# define EV_USE_KQUEUE 0 311# define EV_USE_KQUEUE 0
189#endif 312#endif
… …
191#ifndef EV_USE_PORT 314#ifndef EV_USE_PORT
192# define EV_USE_PORT 0 315# define EV_USE_PORT 0
193#endif 316#endif
194 317
195#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
196# define EV_USE_INOTIFY 0 322# define EV_USE_INOTIFY 0
323# endif
197#endif 324#endif
198 325
199#ifndef EV_PID_HASHSIZE 326#ifndef EV_PID_HASHSIZE
200# if EV_MINIMAL 327# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
201# 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
202# else 337# else
203# define EV_PID_HASHSIZE 16 338# define EV_USE_EVENTFD 0
204# endif 339# endif
205#endif 340#endif
206 341
207#ifndef EV_INOTIFY_HASHSIZE 342#ifndef EV_USE_SIGNALFD
208# if EV_MINIMAL 343# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
209# define EV_INOTIFY_HASHSIZE 1 344# define EV_USE_SIGNALFD EV_FEATURE_OS
210# else 345# else
211# define EV_INOTIFY_HASHSIZE 16 346# define EV_USE_SIGNALFD 0
212# endif 347# endif
213#endif 348#endif
214 349
215/**/ 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 */
216 399
217#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
218# undef EV_USE_MONOTONIC 401# undef EV_USE_MONOTONIC
219# define EV_USE_MONOTONIC 0 402# define EV_USE_MONOTONIC 0
220#endif 403#endif
… …
228# undef EV_USE_INOTIFY 411# undef EV_USE_INOTIFY
229# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
230#endif 413#endif
231 414
232#if !EV_USE_NANOSLEEP 415#if !EV_USE_NANOSLEEP
233# ifndef _WIN32 416/* hp-ux has it in sys/time.h, which we unconditionally include above */
417# if !defined _WIN32 && !defined __hpux
234# include <sys/select.h> 418# include <sys/select.h>
235# endif 419# endif
236#endif 420#endif
237 421
238#if EV_USE_INOTIFY 422#if EV_USE_INOTIFY
423# include <sys/statfs.h>
239# 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
240#endif 429# endif
430#endif
241 431
242#if EV_SELECT_IS_WINSOCKET 432#if EV_USE_EVENTFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
243# include <winsock.h> 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};
244#endif 468#endif
245 469
246/**/ 470/**/
247 471
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
248/* 478/*
249 * This is used to avoid floating point rounding problems. 479 * This is used to work around floating point rounding problems.
250 * It is added to ev_rt_now when scheduling periodics
251 * to ensure progress, time-wise, even when rounding
252 * errors are against us.
253 * This value is good at least till the year 4000. 480 * This value is good at least till the year 4000.
254 * Better solutions welcome.
255 */ 481 */
256#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 482#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
483/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
257 484
258#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) */
259#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) */
260/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
261 487
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 0x00010005
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;
262#if __GNUC__ >= 4 546 #if __GNUC__
547 typedef signed long long int64_t;
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
562#else
563 #include <inttypes.h>
564 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
565 #define ECB_PTRSIZE 8
566 #else
567 #define ECB_PTRSIZE 4
568 #endif
569#endif
570
571#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
572#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
573
574/* work around x32 idiocy by defining proper macros */
575#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
576 #if _ILP32
577 #define ECB_AMD64_X32 1
578 #else
579 #define ECB_AMD64 1
580 #endif
581#endif
582
583/* many compilers define _GNUC_ to some versions but then only implement
584 * what their idiot authors think are the "more important" extensions,
585 * causing enormous grief in return for some better fake benchmark numbers.
586 * or so.
587 * we try to detect these and simply assume they are not gcc - if they have
588 * an issue with that they should have done it right in the first place.
589 */
590#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
591 #define ECB_GCC_VERSION(major,minor) 0
592#else
593 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
594#endif
595
596#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
597
598#if __clang__ && defined __has_builtin
599 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
600#else
601 #define ECB_CLANG_BUILTIN(x) 0
602#endif
603
604#if __clang__ && defined __has_extension
605 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
606#else
607 #define ECB_CLANG_EXTENSION(x) 0
608#endif
609
610#define ECB_CPP (__cplusplus+0)
611#define ECB_CPP11 (__cplusplus >= 201103L)
612
613#if ECB_CPP
614 #define ECB_C 0
615 #define ECB_STDC_VERSION 0
616#else
617 #define ECB_C 1
618 #define ECB_STDC_VERSION __STDC_VERSION__
619#endif
620
621#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
622#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
623
624#if ECB_CPP
625 #define ECB_EXTERN_C extern "C"
626 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
627 #define ECB_EXTERN_C_END }
628#else
629 #define ECB_EXTERN_C extern
630 #define ECB_EXTERN_C_BEG
631 #define ECB_EXTERN_C_END
632#endif
633
634/*****************************************************************************/
635
636/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
637/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
638
639#if ECB_NO_THREADS
640 #define ECB_NO_SMP 1
641#endif
642
643#if ECB_NO_SMP
644 #define ECB_MEMORY_FENCE do { } while (0)
645#endif
646
647/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
648#if __xlC__ && ECB_CPP
649 #include <builtins.h>
650#endif
651
652#if 1400 <= _MSC_VER
653 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
654#endif
655
656#ifndef ECB_MEMORY_FENCE
657 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
658 #if __i386 || __i386__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
662 #elif ECB_GCC_AMD64
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
664 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
665 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
666 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
667 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
668 #elif defined __ARM_ARCH_2__ \
669 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
670 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
671 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
672 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
673 || defined __ARM_ARCH_5TEJ__
674 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
675 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
676 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
677 || defined __ARM_ARCH_6T2__
678 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
679 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
680 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
681 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
682 #elif __aarch64__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
684 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
686 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
687 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
688 #elif defined __s390__ || defined __s390x__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
690 #elif defined __mips__
691 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
692 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
694 #elif defined __alpha__
695 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
696 #elif defined __hppa__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
698 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
699 #elif defined __ia64__
700 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
701 #elif defined __m68k__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
703 #elif defined __m88k__
704 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
705 #elif defined __sh__
706 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
707 #endif
708 #endif
709#endif
710
711#ifndef ECB_MEMORY_FENCE
712 #if ECB_GCC_VERSION(4,7)
713 /* see comment below (stdatomic.h) about the C11 memory model. */
714 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
715 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
716 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
717
718 #elif ECB_CLANG_EXTENSION(c_atomic)
719 /* see comment below (stdatomic.h) about the C11 memory model. */
720 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
721 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
722 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
723
724 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
725 #define ECB_MEMORY_FENCE __sync_synchronize ()
726 #elif _MSC_VER >= 1500 /* VC++ 2008 */
727 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
728 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
729 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
730 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
731 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
732 #elif _MSC_VER >= 1400 /* VC++ 2005 */
733 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
734 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
735 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
736 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
737 #elif defined _WIN32
738 #include <WinNT.h>
739 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
740 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
741 #include <mbarrier.h>
742 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
743 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
744 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
745 #elif __xlC__
746 #define ECB_MEMORY_FENCE __sync ()
747 #endif
748#endif
749
750#ifndef ECB_MEMORY_FENCE
751 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
752 /* we assume that these memory fences work on all variables/all memory accesses, */
753 /* not just C11 atomics and atomic accesses */
754 #include <stdatomic.h>
755 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
756 /* any fence other than seq_cst, which isn't very efficient for us. */
757 /* Why that is, we don't know - either the C11 memory model is quite useless */
758 /* for most usages, or gcc and clang have a bug */
759 /* I *currently* lean towards the latter, and inefficiently implement */
760 /* all three of ecb's fences as a seq_cst fence */
761 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
762 /* for all __atomic_thread_fence's except seq_cst */
763 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
764 #endif
765#endif
766
767#ifndef ECB_MEMORY_FENCE
768 #if !ECB_AVOID_PTHREADS
769 /*
770 * if you get undefined symbol references to pthread_mutex_lock,
771 * or failure to find pthread.h, then you should implement
772 * the ECB_MEMORY_FENCE operations for your cpu/compiler
773 * OR provide pthread.h and link against the posix thread library
774 * of your system.
775 */
776 #include <pthread.h>
777 #define ECB_NEEDS_PTHREADS 1
778 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
779
780 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
781 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
782 #endif
783#endif
784
785#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
786 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
787#endif
788
789#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
790 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
791#endif
792
793/*****************************************************************************/
794
795#if ECB_CPP
796 #define ecb_inline static inline
797#elif ECB_GCC_VERSION(2,5)
798 #define ecb_inline static __inline__
799#elif ECB_C99
800 #define ecb_inline static inline
801#else
802 #define ecb_inline static
803#endif
804
805#if ECB_GCC_VERSION(3,3)
806 #define ecb_restrict __restrict__
807#elif ECB_C99
808 #define ecb_restrict restrict
809#else
810 #define ecb_restrict
811#endif
812
813typedef int ecb_bool;
814
815#define ECB_CONCAT_(a, b) a ## b
816#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
817#define ECB_STRINGIFY_(a) # a
818#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
819#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
820
821#define ecb_function_ ecb_inline
822
823#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
824 #define ecb_attribute(attrlist) __attribute__ (attrlist)
825#else
826 #define ecb_attribute(attrlist)
827#endif
828
829#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
830 #define ecb_is_constant(expr) __builtin_constant_p (expr)
831#else
832 /* possible C11 impl for integral types
833 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
834 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
835
836 #define ecb_is_constant(expr) 0
837#endif
838
839#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
263# define expect(expr,value) __builtin_expect ((expr),(value)) 840 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
264# define noinline __attribute__ ((noinline))
265#else 841#else
266# define expect(expr,value) (expr) 842 #define ecb_expect(expr,value) (expr)
267# define noinline
268# if __STDC_VERSION__ < 199901L
269# define inline
270# endif 843#endif
271#endif
272 844
845#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
846 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
847#else
848 #define ecb_prefetch(addr,rw,locality)
849#endif
850
851/* no emulation for ecb_decltype */
852#if ECB_CPP11
853 // older implementations might have problems with decltype(x)::type, work around it
854 template<class T> struct ecb_decltype_t { typedef T type; };
855 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
856#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
857 #define ecb_decltype(x) __typeof__ (x)
858#endif
859
860#if _MSC_VER >= 1300
861 #define ecb_deprecated __declspec (deprecated)
862#else
863 #define ecb_deprecated ecb_attribute ((__deprecated__))
864#endif
865
866#if _MSC_VER >= 1500
867 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
868#elif ECB_GCC_VERSION(4,5)
869 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
870#else
871 #define ecb_deprecated_message(msg) ecb_deprecated
872#endif
873
874#if _MSC_VER >= 1400
875 #define ecb_noinline __declspec (noinline)
876#else
877 #define ecb_noinline ecb_attribute ((__noinline__))
878#endif
879
880#define ecb_unused ecb_attribute ((__unused__))
881#define ecb_const ecb_attribute ((__const__))
882#define ecb_pure ecb_attribute ((__pure__))
883
884#if ECB_C11 || __IBMC_NORETURN
885 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
886 #define ecb_noreturn _Noreturn
887#elif ECB_CPP11
888 #define ecb_noreturn [[noreturn]]
889#elif _MSC_VER >= 1200
890 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
891 #define ecb_noreturn __declspec (noreturn)
892#else
893 #define ecb_noreturn ecb_attribute ((__noreturn__))
894#endif
895
896#if ECB_GCC_VERSION(4,3)
897 #define ecb_artificial ecb_attribute ((__artificial__))
898 #define ecb_hot ecb_attribute ((__hot__))
899 #define ecb_cold ecb_attribute ((__cold__))
900#else
901 #define ecb_artificial
902 #define ecb_hot
903 #define ecb_cold
904#endif
905
906/* put around conditional expressions if you are very sure that the */
907/* expression is mostly true or mostly false. note that these return */
908/* booleans, not the expression. */
273#define expect_false(expr) expect ((expr) != 0, 0) 909#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
274#define expect_true(expr) expect ((expr) != 0, 1) 910#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
911/* for compatibility to the rest of the world */
912#define ecb_likely(expr) ecb_expect_true (expr)
913#define ecb_unlikely(expr) ecb_expect_false (expr)
914
915/* count trailing zero bits and count # of one bits */
916#if ECB_GCC_VERSION(3,4) \
917 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
918 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
919 && ECB_CLANG_BUILTIN(__builtin_popcount))
920 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
921 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
922 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
923 #define ecb_ctz32(x) __builtin_ctz (x)
924 #define ecb_ctz64(x) __builtin_ctzll (x)
925 #define ecb_popcount32(x) __builtin_popcount (x)
926 /* no popcountll */
927#else
928 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
929 ecb_function_ ecb_const int
930 ecb_ctz32 (uint32_t x)
931 {
932#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
933 unsigned long r;
934 _BitScanForward (&r, x);
935 return (int)r;
936#else
937 int r = 0;
938
939 x &= ~x + 1; /* this isolates the lowest bit */
940
941#if ECB_branchless_on_i386
942 r += !!(x & 0xaaaaaaaa) << 0;
943 r += !!(x & 0xcccccccc) << 1;
944 r += !!(x & 0xf0f0f0f0) << 2;
945 r += !!(x & 0xff00ff00) << 3;
946 r += !!(x & 0xffff0000) << 4;
947#else
948 if (x & 0xaaaaaaaa) r += 1;
949 if (x & 0xcccccccc) r += 2;
950 if (x & 0xf0f0f0f0) r += 4;
951 if (x & 0xff00ff00) r += 8;
952 if (x & 0xffff0000) r += 16;
953#endif
954
955 return r;
956#endif
957 }
958
959 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
960 ecb_function_ ecb_const int
961 ecb_ctz64 (uint64_t x)
962 {
963#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
964 unsigned long r;
965 _BitScanForward64 (&r, x);
966 return (int)r;
967#else
968 int shift = x & 0xffffffff ? 0 : 32;
969 return ecb_ctz32 (x >> shift) + shift;
970#endif
971 }
972
973 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
974 ecb_function_ ecb_const int
975 ecb_popcount32 (uint32_t x)
976 {
977 x -= (x >> 1) & 0x55555555;
978 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
979 x = ((x >> 4) + x) & 0x0f0f0f0f;
980 x *= 0x01010101;
981
982 return x >> 24;
983 }
984
985 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
986 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
987 {
988#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
989 unsigned long r;
990 _BitScanReverse (&r, x);
991 return (int)r;
992#else
993 int r = 0;
994
995 if (x >> 16) { x >>= 16; r += 16; }
996 if (x >> 8) { x >>= 8; r += 8; }
997 if (x >> 4) { x >>= 4; r += 4; }
998 if (x >> 2) { x >>= 2; r += 2; }
999 if (x >> 1) { r += 1; }
1000
1001 return r;
1002#endif
1003 }
1004
1005 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1006 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1007 {
1008#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1009 unsigned long r;
1010 _BitScanReverse64 (&r, x);
1011 return (int)r;
1012#else
1013 int r = 0;
1014
1015 if (x >> 32) { x >>= 32; r += 32; }
1016
1017 return r + ecb_ld32 (x);
1018#endif
1019 }
1020#endif
1021
1022ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1023ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1024ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1025ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1026
1027ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1028ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1029{
1030 return ( (x * 0x0802U & 0x22110U)
1031 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1032}
1033
1034ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1035ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1036{
1037 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1038 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1039 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1040 x = ( x >> 8 ) | ( x << 8);
1041
1042 return x;
1043}
1044
1045ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1046ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1047{
1048 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1049 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1050 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1051 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1052 x = ( x >> 16 ) | ( x << 16);
1053
1054 return x;
1055}
1056
1057/* popcount64 is only available on 64 bit cpus as gcc builtin */
1058/* so for this version we are lazy */
1059ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1060ecb_function_ ecb_const int
1061ecb_popcount64 (uint64_t x)
1062{
1063 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1064}
1065
1066ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1067ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1068ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1069ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1070ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1071ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1072ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1073ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1074
1075ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1076ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1077ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1078ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1079ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1080ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1081ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1082ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1083
1084#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1085 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1086 #define ecb_bswap16(x) __builtin_bswap16 (x)
1087 #else
1088 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1089 #endif
1090 #define ecb_bswap32(x) __builtin_bswap32 (x)
1091 #define ecb_bswap64(x) __builtin_bswap64 (x)
1092#elif _MSC_VER
1093 #include <stdlib.h>
1094 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1095 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1096 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1097#else
1098 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1099 ecb_function_ ecb_const uint16_t
1100 ecb_bswap16 (uint16_t x)
1101 {
1102 return ecb_rotl16 (x, 8);
1103 }
1104
1105 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1106 ecb_function_ ecb_const uint32_t
1107 ecb_bswap32 (uint32_t x)
1108 {
1109 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1110 }
1111
1112 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1113 ecb_function_ ecb_const uint64_t
1114 ecb_bswap64 (uint64_t x)
1115 {
1116 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1117 }
1118#endif
1119
1120#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1121 #define ecb_unreachable() __builtin_unreachable ()
1122#else
1123 /* this seems to work fine, but gcc always emits a warning for it :/ */
1124 ecb_inline ecb_noreturn void ecb_unreachable (void);
1125 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1126#endif
1127
1128/* try to tell the compiler that some condition is definitely true */
1129#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1130
1131ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1132ecb_inline ecb_const uint32_t
1133ecb_byteorder_helper (void)
1134{
1135 /* the union code still generates code under pressure in gcc, */
1136 /* but less than using pointers, and always seems to */
1137 /* successfully return a constant. */
1138 /* the reason why we have this horrible preprocessor mess */
1139 /* is to avoid it in all cases, at least on common architectures */
1140 /* or when using a recent enough gcc version (>= 4.6) */
1141#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1142 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1143 #define ECB_LITTLE_ENDIAN 1
1144 return 0x44332211;
1145#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1146 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1147 #define ECB_BIG_ENDIAN 1
1148 return 0x11223344;
1149#else
1150 union
1151 {
1152 uint8_t c[4];
1153 uint32_t u;
1154 } u = { 0x11, 0x22, 0x33, 0x44 };
1155 return u.u;
1156#endif
1157}
1158
1159ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1160ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1161ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1162ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1163
1164#if ECB_GCC_VERSION(3,0) || ECB_C99
1165 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1166#else
1167 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1168#endif
1169
1170#if ECB_CPP
1171 template<typename T>
1172 static inline T ecb_div_rd (T val, T div)
1173 {
1174 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1175 }
1176 template<typename T>
1177 static inline T ecb_div_ru (T val, T div)
1178 {
1179 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1180 }
1181#else
1182 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1183 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1184#endif
1185
1186#if ecb_cplusplus_does_not_suck
1187 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1188 template<typename T, int N>
1189 static inline int ecb_array_length (const T (&arr)[N])
1190 {
1191 return N;
1192 }
1193#else
1194 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1195#endif
1196
1197ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1198ecb_function_ ecb_const uint32_t
1199ecb_binary16_to_binary32 (uint32_t x)
1200{
1201 unsigned int s = (x & 0x8000) << (31 - 15);
1202 int e = (x >> 10) & 0x001f;
1203 unsigned int m = x & 0x03ff;
1204
1205 if (ecb_expect_false (e == 31))
1206 /* infinity or NaN */
1207 e = 255 - (127 - 15);
1208 else if (ecb_expect_false (!e))
1209 {
1210 if (ecb_expect_true (!m))
1211 /* zero, handled by code below by forcing e to 0 */
1212 e = 0 - (127 - 15);
1213 else
1214 {
1215 /* subnormal, renormalise */
1216 unsigned int s = 10 - ecb_ld32 (m);
1217
1218 m = (m << s) & 0x3ff; /* mask implicit bit */
1219 e -= s - 1;
1220 }
1221 }
1222
1223 /* e and m now are normalised, or zero, (or inf or nan) */
1224 e += 127 - 15;
1225
1226 return s | (e << 23) | (m << (23 - 10));
1227}
1228
1229ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1230ecb_function_ ecb_const uint16_t
1231ecb_binary32_to_binary16 (uint32_t x)
1232{
1233 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1234 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1235 unsigned int m = x & 0x007fffff;
1236
1237 x &= 0x7fffffff;
1238
1239 /* if it's within range of binary16 normals, use fast path */
1240 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1241 {
1242 /* mantissa round-to-even */
1243 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1244
1245 /* handle overflow */
1246 if (ecb_expect_false (m >= 0x00800000))
1247 {
1248 m >>= 1;
1249 e += 1;
1250 }
1251
1252 return s | (e << 10) | (m >> (23 - 10));
1253 }
1254
1255 /* handle large numbers and infinity */
1256 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1257 return s | 0x7c00;
1258
1259 /* handle zero, subnormals and small numbers */
1260 if (ecb_expect_true (x < 0x38800000))
1261 {
1262 /* zero */
1263 if (ecb_expect_true (!x))
1264 return s;
1265
1266 /* handle subnormals */
1267
1268 /* too small, will be zero */
1269 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1270 return s;
1271
1272 m |= 0x00800000; /* make implicit bit explicit */
1273
1274 /* very tricky - we need to round to the nearest e (+10) bit value */
1275 {
1276 unsigned int bits = 14 - e;
1277 unsigned int half = (1 << (bits - 1)) - 1;
1278 unsigned int even = (m >> bits) & 1;
1279
1280 /* if this overflows, we will end up with a normalised number */
1281 m = (m + half + even) >> bits;
1282 }
1283
1284 return s | m;
1285 }
1286
1287 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1288 m >>= 13;
1289
1290 return s | 0x7c00 | m | !m;
1291}
1292
1293/*******************************************************************************/
1294/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1295
1296/* basically, everything uses "ieee pure-endian" floating point numbers */
1297/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1298#if 0 \
1299 || __i386 || __i386__ \
1300 || ECB_GCC_AMD64 \
1301 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1302 || defined __s390__ || defined __s390x__ \
1303 || defined __mips__ \
1304 || defined __alpha__ \
1305 || defined __hppa__ \
1306 || defined __ia64__ \
1307 || defined __m68k__ \
1308 || defined __m88k__ \
1309 || defined __sh__ \
1310 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1311 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1312 || defined __aarch64__
1313 #define ECB_STDFP 1
1314 #include <string.h> /* for memcpy */
1315#else
1316 #define ECB_STDFP 0
1317#endif
1318
1319#ifndef ECB_NO_LIBM
1320
1321 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1322
1323 /* only the oldest of old doesn't have this one. solaris. */
1324 #ifdef INFINITY
1325 #define ECB_INFINITY INFINITY
1326 #else
1327 #define ECB_INFINITY HUGE_VAL
1328 #endif
1329
1330 #ifdef NAN
1331 #define ECB_NAN NAN
1332 #else
1333 #define ECB_NAN ECB_INFINITY
1334 #endif
1335
1336 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1337 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1338 #define ecb_frexpf(x,e) frexpf ((x), (e))
1339 #else
1340 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1341 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1342 #endif
1343
1344 /* convert a float to ieee single/binary32 */
1345 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1346 ecb_function_ ecb_const uint32_t
1347 ecb_float_to_binary32 (float x)
1348 {
1349 uint32_t r;
1350
1351 #if ECB_STDFP
1352 memcpy (&r, &x, 4);
1353 #else
1354 /* slow emulation, works for anything but -0 */
1355 uint32_t m;
1356 int e;
1357
1358 if (x == 0e0f ) return 0x00000000U;
1359 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1360 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1361 if (x != x ) return 0x7fbfffffU;
1362
1363 m = ecb_frexpf (x, &e) * 0x1000000U;
1364
1365 r = m & 0x80000000U;
1366
1367 if (r)
1368 m = -m;
1369
1370 if (e <= -126)
1371 {
1372 m &= 0xffffffU;
1373 m >>= (-125 - e);
1374 e = -126;
1375 }
1376
1377 r |= (e + 126) << 23;
1378 r |= m & 0x7fffffU;
1379 #endif
1380
1381 return r;
1382 }
1383
1384 /* converts an ieee single/binary32 to a float */
1385 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1386 ecb_function_ ecb_const float
1387 ecb_binary32_to_float (uint32_t x)
1388 {
1389 float r;
1390
1391 #if ECB_STDFP
1392 memcpy (&r, &x, 4);
1393 #else
1394 /* emulation, only works for normals and subnormals and +0 */
1395 int neg = x >> 31;
1396 int e = (x >> 23) & 0xffU;
1397
1398 x &= 0x7fffffU;
1399
1400 if (e)
1401 x |= 0x800000U;
1402 else
1403 e = 1;
1404
1405 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1406 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1407
1408 r = neg ? -r : r;
1409 #endif
1410
1411 return r;
1412 }
1413
1414 /* convert a double to ieee double/binary64 */
1415 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1416 ecb_function_ ecb_const uint64_t
1417 ecb_double_to_binary64 (double x)
1418 {
1419 uint64_t r;
1420
1421 #if ECB_STDFP
1422 memcpy (&r, &x, 8);
1423 #else
1424 /* slow emulation, works for anything but -0 */
1425 uint64_t m;
1426 int e;
1427
1428 if (x == 0e0 ) return 0x0000000000000000U;
1429 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1430 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1431 if (x != x ) return 0X7ff7ffffffffffffU;
1432
1433 m = frexp (x, &e) * 0x20000000000000U;
1434
1435 r = m & 0x8000000000000000;;
1436
1437 if (r)
1438 m = -m;
1439
1440 if (e <= -1022)
1441 {
1442 m &= 0x1fffffffffffffU;
1443 m >>= (-1021 - e);
1444 e = -1022;
1445 }
1446
1447 r |= ((uint64_t)(e + 1022)) << 52;
1448 r |= m & 0xfffffffffffffU;
1449 #endif
1450
1451 return r;
1452 }
1453
1454 /* converts an ieee double/binary64 to a double */
1455 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1456 ecb_function_ ecb_const double
1457 ecb_binary64_to_double (uint64_t x)
1458 {
1459 double r;
1460
1461 #if ECB_STDFP
1462 memcpy (&r, &x, 8);
1463 #else
1464 /* emulation, only works for normals and subnormals and +0 */
1465 int neg = x >> 63;
1466 int e = (x >> 52) & 0x7ffU;
1467
1468 x &= 0xfffffffffffffU;
1469
1470 if (e)
1471 x |= 0x10000000000000U;
1472 else
1473 e = 1;
1474
1475 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1476 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1477
1478 r = neg ? -r : r;
1479 #endif
1480
1481 return r;
1482 }
1483
1484 /* convert a float to ieee half/binary16 */
1485 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1486 ecb_function_ ecb_const uint16_t
1487 ecb_float_to_binary16 (float x)
1488 {
1489 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1490 }
1491
1492 /* convert an ieee half/binary16 to float */
1493 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1494 ecb_function_ ecb_const float
1495 ecb_binary16_to_float (uint16_t x)
1496 {
1497 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1498 }
1499
1500#endif
1501
1502#endif
1503
1504/* ECB.H END */
1505
1506#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1507/* if your architecture doesn't need memory fences, e.g. because it is
1508 * single-cpu/core, or if you use libev in a project that doesn't use libev
1509 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1510 * libev, in which cases the memory fences become nops.
1511 * alternatively, you can remove this #error and link against libpthread,
1512 * which will then provide the memory fences.
1513 */
1514# error "memory fences not defined for your architecture, please report"
1515#endif
1516
1517#ifndef ECB_MEMORY_FENCE
1518# define ECB_MEMORY_FENCE do { } while (0)
1519# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1520# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1521#endif
1522
1523#define expect_false(cond) ecb_expect_false (cond)
1524#define expect_true(cond) ecb_expect_true (cond)
1525#define noinline ecb_noinline
1526
275#define inline_size static inline 1527#define inline_size ecb_inline
276 1528
277#if EV_MINIMAL 1529#if EV_FEATURE_CODE
278# define inline_speed static noinline
279#else
280# define inline_speed static inline 1530# define inline_speed ecb_inline
1531#else
1532# define inline_speed noinline static
281#endif 1533#endif
282 1534
283#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1535#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1536
1537#if EV_MINPRI == EV_MAXPRI
1538# define ABSPRI(w) (((W)w), 0)
1539#else
284#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1540# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1541#endif
285 1542
286#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1543#define EMPTY /* required for microsofts broken pseudo-c compiler */
287#define EMPTY2(a,b) /* used to suppress some warnings */ 1544#define EMPTY2(a,b) /* used to suppress some warnings */
288 1545
289typedef ev_watcher *W; 1546typedef ev_watcher *W;
290typedef ev_watcher_list *WL; 1547typedef ev_watcher_list *WL;
291typedef ev_watcher_time *WT; 1548typedef ev_watcher_time *WT;
292 1549
1550#define ev_active(w) ((W)(w))->active
1551#define ev_at(w) ((WT)(w))->at
1552
1553#if EV_USE_REALTIME
1554/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1555/* giving it a reasonably high chance of working on typical architectures */
1556static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1557#endif
1558
293#if EV_USE_MONOTONIC 1559#if EV_USE_MONOTONIC
294/* sig_atomic_t is used to avoid per-thread variables or locking but still */
295/* giving it a reasonably high chance of working on typical architetcures */
296static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1560static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1561#endif
1562
1563#ifndef EV_FD_TO_WIN32_HANDLE
1564# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1565#endif
1566#ifndef EV_WIN32_HANDLE_TO_FD
1567# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1568#endif
1569#ifndef EV_WIN32_CLOSE_FD
1570# define EV_WIN32_CLOSE_FD(fd) close (fd)
297#endif 1571#endif
298 1572
299#ifdef _WIN32 1573#ifdef _WIN32
300# include "ev_win32.c" 1574# include "ev_win32.c"
301#endif 1575#endif
302 1576
303/*****************************************************************************/ 1577/*****************************************************************************/
304 1578
1579/* define a suitable floor function (only used by periodics atm) */
1580
1581#if EV_USE_FLOOR
1582# include <math.h>
1583# define ev_floor(v) floor (v)
1584#else
1585
1586#include <float.h>
1587
1588/* a floor() replacement function, should be independent of ev_tstamp type */
1589noinline
1590static ev_tstamp
1591ev_floor (ev_tstamp v)
1592{
1593 /* the choice of shift factor is not terribly important */
1594#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1595 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1596#else
1597 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1598#endif
1599
1600 /* argument too large for an unsigned long? */
1601 if (expect_false (v >= shift))
1602 {
1603 ev_tstamp f;
1604
1605 if (v == v - 1.)
1606 return v; /* very large number */
1607
1608 f = shift * ev_floor (v * (1. / shift));
1609 return f + ev_floor (v - f);
1610 }
1611
1612 /* special treatment for negative args? */
1613 if (expect_false (v < 0.))
1614 {
1615 ev_tstamp f = -ev_floor (-v);
1616
1617 return f - (f == v ? 0 : 1);
1618 }
1619
1620 /* fits into an unsigned long */
1621 return (unsigned long)v;
1622}
1623
1624#endif
1625
1626/*****************************************************************************/
1627
1628#ifdef __linux
1629# include <sys/utsname.h>
1630#endif
1631
1632noinline ecb_cold
1633static unsigned int
1634ev_linux_version (void)
1635{
1636#ifdef __linux
1637 unsigned int v = 0;
1638 struct utsname buf;
1639 int i;
1640 char *p = buf.release;
1641
1642 if (uname (&buf))
1643 return 0;
1644
1645 for (i = 3+1; --i; )
1646 {
1647 unsigned int c = 0;
1648
1649 for (;;)
1650 {
1651 if (*p >= '0' && *p <= '9')
1652 c = c * 10 + *p++ - '0';
1653 else
1654 {
1655 p += *p == '.';
1656 break;
1657 }
1658 }
1659
1660 v = (v << 8) | c;
1661 }
1662
1663 return v;
1664#else
1665 return 0;
1666#endif
1667}
1668
1669/*****************************************************************************/
1670
1671#if EV_AVOID_STDIO
1672noinline ecb_cold
1673static void
1674ev_printerr (const char *msg)
1675{
1676 write (STDERR_FILENO, msg, strlen (msg));
1677}
1678#endif
1679
305static void (*syserr_cb)(const char *msg); 1680static void (*syserr_cb)(const char *msg) EV_THROW;
306 1681
1682ecb_cold
307void 1683void
308ev_set_syserr_cb (void (*cb)(const char *msg)) 1684ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
309{ 1685{
310 syserr_cb = cb; 1686 syserr_cb = cb;
311} 1687}
312 1688
313static void noinline 1689noinline ecb_cold
1690static void
314syserr (const char *msg) 1691ev_syserr (const char *msg)
315{ 1692{
316 if (!msg) 1693 if (!msg)
317 msg = "(libev) system error"; 1694 msg = "(libev) system error";
318 1695
319 if (syserr_cb) 1696 if (syserr_cb)
320 syserr_cb (msg); 1697 syserr_cb (msg);
321 else 1698 else
322 { 1699 {
1700#if EV_AVOID_STDIO
1701 ev_printerr (msg);
1702 ev_printerr (": ");
1703 ev_printerr (strerror (errno));
1704 ev_printerr ("\n");
1705#else
323 perror (msg); 1706 perror (msg);
1707#endif
324 abort (); 1708 abort ();
325 } 1709 }
326} 1710}
327 1711
1712static void *
1713ev_realloc_emul (void *ptr, long size) EV_THROW
1714{
1715 /* some systems, notably openbsd and darwin, fail to properly
1716 * implement realloc (x, 0) (as required by both ansi c-89 and
1717 * the single unix specification, so work around them here.
1718 * recently, also (at least) fedora and debian started breaking it,
1719 * despite documenting it otherwise.
1720 */
1721
1722 if (size)
1723 return realloc (ptr, size);
1724
1725 free (ptr);
1726 return 0;
1727}
1728
328static void *(*alloc)(void *ptr, long size); 1729static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
329 1730
1731ecb_cold
330void 1732void
331ev_set_allocator (void *(*cb)(void *ptr, long size)) 1733ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
332{ 1734{
333 alloc = cb; 1735 alloc = cb;
334} 1736}
335 1737
336inline_speed void * 1738inline_speed void *
337ev_realloc (void *ptr, long size) 1739ev_realloc (void *ptr, long size)
338{ 1740{
339 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1741 ptr = alloc (ptr, size);
340 1742
341 if (!ptr && size) 1743 if (!ptr && size)
342 { 1744 {
1745#if EV_AVOID_STDIO
1746 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1747#else
343 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1748 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1749#endif
344 abort (); 1750 abort ();
345 } 1751 }
346 1752
347 return ptr; 1753 return ptr;
348} 1754}
… …
350#define ev_malloc(size) ev_realloc (0, (size)) 1756#define ev_malloc(size) ev_realloc (0, (size))
351#define ev_free(ptr) ev_realloc ((ptr), 0) 1757#define ev_free(ptr) ev_realloc ((ptr), 0)
352 1758
353/*****************************************************************************/ 1759/*****************************************************************************/
354 1760
1761/* set in reify when reification needed */
1762#define EV_ANFD_REIFY 1
1763
1764/* file descriptor info structure */
355typedef struct 1765typedef struct
356{ 1766{
357 WL head; 1767 WL head;
358 unsigned char events; 1768 unsigned char events; /* the events watched for */
1769 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1770 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
359 unsigned char reify; 1771 unsigned char unused;
1772#if EV_USE_EPOLL
1773 unsigned int egen; /* generation counter to counter epoll bugs */
1774#endif
360#if EV_SELECT_IS_WINSOCKET 1775#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
361 SOCKET handle; 1776 SOCKET handle;
362#endif 1777#endif
1778#if EV_USE_IOCP
1779 OVERLAPPED or, ow;
1780#endif
363} ANFD; 1781} ANFD;
364 1782
1783/* stores the pending event set for a given watcher */
365typedef struct 1784typedef struct
366{ 1785{
367 W w; 1786 W w;
368 int events; 1787 int events; /* the pending event set for the given watcher */
369} ANPENDING; 1788} ANPENDING;
370 1789
371#if EV_USE_INOTIFY 1790#if EV_USE_INOTIFY
1791/* hash table entry per inotify-id */
372typedef struct 1792typedef struct
373{ 1793{
374 WL head; 1794 WL head;
375} ANFS; 1795} ANFS;
1796#endif
1797
1798/* Heap Entry */
1799#if EV_HEAP_CACHE_AT
1800 /* a heap element */
1801 typedef struct {
1802 ev_tstamp at;
1803 WT w;
1804 } ANHE;
1805
1806 #define ANHE_w(he) (he).w /* access watcher, read-write */
1807 #define ANHE_at(he) (he).at /* access cached at, read-only */
1808 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1809#else
1810 /* a heap element */
1811 typedef WT ANHE;
1812
1813 #define ANHE_w(he) (he)
1814 #define ANHE_at(he) (he)->at
1815 #define ANHE_at_cache(he)
376#endif 1816#endif
377 1817
378#if EV_MULTIPLICITY 1818#if EV_MULTIPLICITY
379 1819
380 struct ev_loop 1820 struct ev_loop
… …
386 #undef VAR 1826 #undef VAR
387 }; 1827 };
388 #include "ev_wrap.h" 1828 #include "ev_wrap.h"
389 1829
390 static struct ev_loop default_loop_struct; 1830 static struct ev_loop default_loop_struct;
391 struct ev_loop *ev_default_loop_ptr; 1831 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
392 1832
393#else 1833#else
394 1834
395 ev_tstamp ev_rt_now; 1835 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
396 #define VAR(name,decl) static decl; 1836 #define VAR(name,decl) static decl;
397 #include "ev_vars.h" 1837 #include "ev_vars.h"
398 #undef VAR 1838 #undef VAR
399 1839
400 static int ev_default_loop_ptr; 1840 static int ev_default_loop_ptr;
401 1841
402#endif 1842#endif
403 1843
1844#if EV_FEATURE_API
1845# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1846# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1847# define EV_INVOKE_PENDING invoke_cb (EV_A)
1848#else
1849# define EV_RELEASE_CB (void)0
1850# define EV_ACQUIRE_CB (void)0
1851# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1852#endif
1853
1854#define EVBREAK_RECURSE 0x80
1855
404/*****************************************************************************/ 1856/*****************************************************************************/
405 1857
1858#ifndef EV_HAVE_EV_TIME
406ev_tstamp 1859ev_tstamp
407ev_time (void) 1860ev_time (void) EV_THROW
408{ 1861{
409#if EV_USE_REALTIME 1862#if EV_USE_REALTIME
1863 if (expect_true (have_realtime))
1864 {
410 struct timespec ts; 1865 struct timespec ts;
411 clock_gettime (CLOCK_REALTIME, &ts); 1866 clock_gettime (CLOCK_REALTIME, &ts);
412 return ts.tv_sec + ts.tv_nsec * 1e-9; 1867 return ts.tv_sec + ts.tv_nsec * 1e-9;
413#else 1868 }
1869#endif
1870
414 struct timeval tv; 1871 struct timeval tv;
415 gettimeofday (&tv, 0); 1872 gettimeofday (&tv, 0);
416 return tv.tv_sec + tv.tv_usec * 1e-6; 1873 return tv.tv_sec + tv.tv_usec * 1e-6;
417#endif
418} 1874}
1875#endif
419 1876
420ev_tstamp inline_size 1877inline_size ev_tstamp
421get_clock (void) 1878get_clock (void)
422{ 1879{
423#if EV_USE_MONOTONIC 1880#if EV_USE_MONOTONIC
424 if (expect_true (have_monotonic)) 1881 if (expect_true (have_monotonic))
425 { 1882 {
… …
432 return ev_time (); 1889 return ev_time ();
433} 1890}
434 1891
435#if EV_MULTIPLICITY 1892#if EV_MULTIPLICITY
436ev_tstamp 1893ev_tstamp
437ev_now (EV_P) 1894ev_now (EV_P) EV_THROW
438{ 1895{
439 return ev_rt_now; 1896 return ev_rt_now;
440} 1897}
441#endif 1898#endif
442 1899
443void 1900void
444ev_sleep (ev_tstamp delay) 1901ev_sleep (ev_tstamp delay) EV_THROW
445{ 1902{
446 if (delay > 0.) 1903 if (delay > 0.)
447 { 1904 {
448#if EV_USE_NANOSLEEP 1905#if EV_USE_NANOSLEEP
449 struct timespec ts; 1906 struct timespec ts;
450 1907
451 ts.tv_sec = (time_t)delay; 1908 EV_TS_SET (ts, delay);
452 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453
454 nanosleep (&ts, 0); 1909 nanosleep (&ts, 0);
455#elif defined(_WIN32) 1910#elif defined _WIN32
1911 /* maybe this should round up, as ms is very low resolution */
1912 /* compared to select (µs) or nanosleep (ns) */
456 Sleep (delay * 1e3); 1913 Sleep ((unsigned long)(delay * 1e3));
457#else 1914#else
458 struct timeval tv; 1915 struct timeval tv;
459 1916
460 tv.tv_sec = (time_t)delay; 1917 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
461 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1918 /* something not guaranteed by newer posix versions, but guaranteed */
462 1919 /* by older ones */
1920 EV_TV_SET (tv, delay);
463 select (0, 0, 0, 0, &tv); 1921 select (0, 0, 0, 0, &tv);
464#endif 1922#endif
465 } 1923 }
466} 1924}
467 1925
468/*****************************************************************************/ 1926/*****************************************************************************/
469 1927
470int inline_size 1928#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1929
1930/* find a suitable new size for the given array, */
1931/* hopefully by rounding to a nice-to-malloc size */
1932inline_size int
471array_nextsize (int elem, int cur, int cnt) 1933array_nextsize (int elem, int cur, int cnt)
472{ 1934{
473 int ncur = cur + 1; 1935 int ncur = cur + 1;
474 1936
475 do 1937 do
476 ncur <<= 1; 1938 ncur <<= 1;
477 while (cnt > ncur); 1939 while (cnt > ncur);
478 1940
479 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1941 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
480 if (elem * ncur > 4096) 1942 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
481 { 1943 {
482 ncur *= elem; 1944 ncur *= elem;
483 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1945 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
484 ncur = ncur - sizeof (void *) * 4; 1946 ncur = ncur - sizeof (void *) * 4;
485 ncur /= elem; 1947 ncur /= elem;
486 } 1948 }
487 1949
488 return ncur; 1950 return ncur;
489} 1951}
490 1952
491static noinline void * 1953noinline ecb_cold
1954static void *
492array_realloc (int elem, void *base, int *cur, int cnt) 1955array_realloc (int elem, void *base, int *cur, int cnt)
493{ 1956{
494 *cur = array_nextsize (elem, *cur, cnt); 1957 *cur = array_nextsize (elem, *cur, cnt);
495 return ev_realloc (base, elem * *cur); 1958 return ev_realloc (base, elem * *cur);
496} 1959}
1960
1961#define array_init_zero(base,count) \
1962 memset ((void *)(base), 0, sizeof (*(base)) * (count))
497 1963
498#define array_needsize(type,base,cur,cnt,init) \ 1964#define array_needsize(type,base,cur,cnt,init) \
499 if (expect_false ((cnt) > (cur))) \ 1965 if (expect_false ((cnt) > (cur))) \
500 { \ 1966 { \
501 int ocur_ = (cur); \ 1967 ecb_unused int ocur_ = (cur); \
502 (base) = (type *)array_realloc \ 1968 (base) = (type *)array_realloc \
503 (sizeof (type), (base), &(cur), (cnt)); \ 1969 (sizeof (type), (base), &(cur), (cnt)); \
504 init ((base) + (ocur_), (cur) - ocur_); \ 1970 init ((base) + (ocur_), (cur) - ocur_); \
505 } 1971 }
506 1972
… …
513 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1979 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
514 } 1980 }
515#endif 1981#endif
516 1982
517#define array_free(stem, idx) \ 1983#define array_free(stem, idx) \
518 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1984 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
519 1985
520/*****************************************************************************/ 1986/*****************************************************************************/
521 1987
1988/* dummy callback for pending events */
522void noinline 1989noinline
1990static void
1991pendingcb (EV_P_ ev_prepare *w, int revents)
1992{
1993}
1994
1995noinline
1996void
523ev_feed_event (EV_P_ void *w, int revents) 1997ev_feed_event (EV_P_ void *w, int revents) EV_THROW
524{ 1998{
525 W w_ = (W)w; 1999 W w_ = (W)w;
526 int pri = ABSPRI (w_); 2000 int pri = ABSPRI (w_);
527 2001
528 if (expect_false (w_->pending)) 2002 if (expect_false (w_->pending))
… …
532 w_->pending = ++pendingcnt [pri]; 2006 w_->pending = ++pendingcnt [pri];
533 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2007 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
534 pendings [pri][w_->pending - 1].w = w_; 2008 pendings [pri][w_->pending - 1].w = w_;
535 pendings [pri][w_->pending - 1].events = revents; 2009 pendings [pri][w_->pending - 1].events = revents;
536 } 2010 }
537}
538 2011
539void inline_speed 2012 pendingpri = NUMPRI - 1;
2013}
2014
2015inline_speed void
2016feed_reverse (EV_P_ W w)
2017{
2018 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
2019 rfeeds [rfeedcnt++] = w;
2020}
2021
2022inline_size void
2023feed_reverse_done (EV_P_ int revents)
2024{
2025 do
2026 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2027 while (rfeedcnt);
2028}
2029
2030inline_speed void
540queue_events (EV_P_ W *events, int eventcnt, int type) 2031queue_events (EV_P_ W *events, int eventcnt, int type)
541{ 2032{
542 int i; 2033 int i;
543 2034
544 for (i = 0; i < eventcnt; ++i) 2035 for (i = 0; i < eventcnt; ++i)
545 ev_feed_event (EV_A_ events [i], type); 2036 ev_feed_event (EV_A_ events [i], type);
546} 2037}
547 2038
548/*****************************************************************************/ 2039/*****************************************************************************/
549 2040
550void inline_size 2041inline_speed void
551anfds_init (ANFD *base, int count)
552{
553 while (count--)
554 {
555 base->head = 0;
556 base->events = EV_NONE;
557 base->reify = 0;
558
559 ++base;
560 }
561}
562
563void inline_speed
564fd_event (EV_P_ int fd, int revents) 2042fd_event_nocheck (EV_P_ int fd, int revents)
565{ 2043{
566 ANFD *anfd = anfds + fd; 2044 ANFD *anfd = anfds + fd;
567 ev_io *w; 2045 ev_io *w;
568 2046
569 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2047 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
573 if (ev) 2051 if (ev)
574 ev_feed_event (EV_A_ (W)w, ev); 2052 ev_feed_event (EV_A_ (W)w, ev);
575 } 2053 }
576} 2054}
577 2055
2056/* do not submit kernel events for fds that have reify set */
2057/* because that means they changed while we were polling for new events */
2058inline_speed void
2059fd_event (EV_P_ int fd, int revents)
2060{
2061 ANFD *anfd = anfds + fd;
2062
2063 if (expect_true (!anfd->reify))
2064 fd_event_nocheck (EV_A_ fd, revents);
2065}
2066
578void 2067void
579ev_feed_fd_event (EV_P_ int fd, int revents) 2068ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
580{ 2069{
581 if (fd >= 0 && fd < anfdmax) 2070 if (fd >= 0 && fd < anfdmax)
582 fd_event (EV_A_ fd, revents); 2071 fd_event_nocheck (EV_A_ fd, revents);
583} 2072}
584 2073
585void inline_size 2074/* make sure the external fd watch events are in-sync */
2075/* with the kernel/libev internal state */
2076inline_size void
586fd_reify (EV_P) 2077fd_reify (EV_P)
587{ 2078{
588 int i; 2079 int i;
2080
2081#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2082 for (i = 0; i < fdchangecnt; ++i)
2083 {
2084 int fd = fdchanges [i];
2085 ANFD *anfd = anfds + fd;
2086
2087 if (anfd->reify & EV__IOFDSET && anfd->head)
2088 {
2089 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2090
2091 if (handle != anfd->handle)
2092 {
2093 unsigned long arg;
2094
2095 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2096
2097 /* handle changed, but fd didn't - we need to do it in two steps */
2098 backend_modify (EV_A_ fd, anfd->events, 0);
2099 anfd->events = 0;
2100 anfd->handle = handle;
2101 }
2102 }
2103 }
2104#endif
589 2105
590 for (i = 0; i < fdchangecnt; ++i) 2106 for (i = 0; i < fdchangecnt; ++i)
591 { 2107 {
592 int fd = fdchanges [i]; 2108 int fd = fdchanges [i];
593 ANFD *anfd = anfds + fd; 2109 ANFD *anfd = anfds + fd;
594 ev_io *w; 2110 ev_io *w;
595 2111
596 unsigned char events = 0; 2112 unsigned char o_events = anfd->events;
2113 unsigned char o_reify = anfd->reify;
597 2114
598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2115 anfd->reify = 0;
599 events |= (unsigned char)w->events;
600 2116
601#if EV_SELECT_IS_WINSOCKET 2117 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
602 if (events)
603 { 2118 {
604 unsigned long argp; 2119 anfd->events = 0;
605 #ifdef EV_FD_TO_WIN32_HANDLE 2120
606 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2121 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
607 #else 2122 anfd->events |= (unsigned char)w->events;
608 anfd->handle = _get_osfhandle (fd); 2123
609 #endif 2124 if (o_events != anfd->events)
610 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 2125 o_reify = EV__IOFDSET; /* actually |= */
611 } 2126 }
612#endif
613 2127
614 { 2128 if (o_reify & EV__IOFDSET)
615 unsigned char o_events = anfd->events;
616 unsigned char o_reify = anfd->reify;
617
618 anfd->reify = 0;
619 anfd->events = events;
620
621 if (o_events != events || o_reify & EV_IOFDSET)
622 backend_modify (EV_A_ fd, o_events, events); 2129 backend_modify (EV_A_ fd, o_events, anfd->events);
623 }
624 } 2130 }
625 2131
626 fdchangecnt = 0; 2132 fdchangecnt = 0;
627} 2133}
628 2134
2135/* something about the given fd changed */
629void inline_size 2136inline_size
2137void
630fd_change (EV_P_ int fd, int flags) 2138fd_change (EV_P_ int fd, int flags)
631{ 2139{
632 unsigned char reify = anfds [fd].reify; 2140 unsigned char reify = anfds [fd].reify;
633 anfds [fd].reify |= flags; 2141 anfds [fd].reify |= flags;
634 2142
… …
638 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2146 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
639 fdchanges [fdchangecnt - 1] = fd; 2147 fdchanges [fdchangecnt - 1] = fd;
640 } 2148 }
641} 2149}
642 2150
643void inline_speed 2151/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2152inline_speed ecb_cold void
644fd_kill (EV_P_ int fd) 2153fd_kill (EV_P_ int fd)
645{ 2154{
646 ev_io *w; 2155 ev_io *w;
647 2156
648 while ((w = (ev_io *)anfds [fd].head)) 2157 while ((w = (ev_io *)anfds [fd].head))
… …
650 ev_io_stop (EV_A_ w); 2159 ev_io_stop (EV_A_ w);
651 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2160 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
652 } 2161 }
653} 2162}
654 2163
655int inline_size 2164/* check whether the given fd is actually valid, for error recovery */
2165inline_size ecb_cold int
656fd_valid (int fd) 2166fd_valid (int fd)
657{ 2167{
658#ifdef _WIN32 2168#ifdef _WIN32
659 return _get_osfhandle (fd) != -1; 2169 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
660#else 2170#else
661 return fcntl (fd, F_GETFD) != -1; 2171 return fcntl (fd, F_GETFD) != -1;
662#endif 2172#endif
663} 2173}
664 2174
665/* called on EBADF to verify fds */ 2175/* called on EBADF to verify fds */
666static void noinline 2176noinline ecb_cold
2177static void
667fd_ebadf (EV_P) 2178fd_ebadf (EV_P)
668{ 2179{
669 int fd; 2180 int fd;
670 2181
671 for (fd = 0; fd < anfdmax; ++fd) 2182 for (fd = 0; fd < anfdmax; ++fd)
672 if (anfds [fd].events) 2183 if (anfds [fd].events)
673 if (!fd_valid (fd) == -1 && errno == EBADF) 2184 if (!fd_valid (fd) && errno == EBADF)
674 fd_kill (EV_A_ fd); 2185 fd_kill (EV_A_ fd);
675} 2186}
676 2187
677/* called on ENOMEM in select/poll to kill some fds and retry */ 2188/* called on ENOMEM in select/poll to kill some fds and retry */
678static void noinline 2189noinline ecb_cold
2190static void
679fd_enomem (EV_P) 2191fd_enomem (EV_P)
680{ 2192{
681 int fd; 2193 int fd;
682 2194
683 for (fd = anfdmax; fd--; ) 2195 for (fd = anfdmax; fd--; )
684 if (anfds [fd].events) 2196 if (anfds [fd].events)
685 { 2197 {
686 fd_kill (EV_A_ fd); 2198 fd_kill (EV_A_ fd);
687 return; 2199 break;
688 } 2200 }
689} 2201}
690 2202
691/* usually called after fork if backend needs to re-arm all fds from scratch */ 2203/* usually called after fork if backend needs to re-arm all fds from scratch */
692static void noinline 2204noinline
2205static void
693fd_rearm_all (EV_P) 2206fd_rearm_all (EV_P)
694{ 2207{
695 int fd; 2208 int fd;
696 2209
697 for (fd = 0; fd < anfdmax; ++fd) 2210 for (fd = 0; fd < anfdmax; ++fd)
698 if (anfds [fd].events) 2211 if (anfds [fd].events)
699 { 2212 {
700 anfds [fd].events = 0; 2213 anfds [fd].events = 0;
2214 anfds [fd].emask = 0;
701 fd_change (EV_A_ fd, EV_IOFDSET | 1); 2215 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
702 } 2216 }
703} 2217}
704 2218
705/*****************************************************************************/ 2219/* used to prepare libev internal fd's */
706 2220/* this is not fork-safe */
707void inline_speed 2221inline_speed void
708upheap (WT *heap, int k)
709{
710 WT w = heap [k];
711
712 while (k)
713 {
714 int p = (k - 1) >> 1;
715
716 if (heap [p]->at <= w->at)
717 break;
718
719 heap [k] = heap [p];
720 ((W)heap [k])->active = k + 1;
721 k = p;
722 }
723
724 heap [k] = w;
725 ((W)heap [k])->active = k + 1;
726}
727
728void inline_speed
729downheap (WT *heap, int N, int k)
730{
731 WT w = heap [k];
732
733 for (;;)
734 {
735 int c = (k << 1) + 1;
736
737 if (c >= N)
738 break;
739
740 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
741 ? 1 : 0;
742
743 if (w->at <= heap [c]->at)
744 break;
745
746 heap [k] = heap [c];
747 ((W)heap [k])->active = k + 1;
748
749 k = c;
750 }
751
752 heap [k] = w;
753 ((W)heap [k])->active = k + 1;
754}
755
756void inline_size
757adjustheap (WT *heap, int N, int k)
758{
759 upheap (heap, k);
760 downheap (heap, N, k);
761}
762
763/*****************************************************************************/
764
765typedef struct
766{
767 WL head;
768 EV_ATOMIC_T gotsig;
769} ANSIG;
770
771static ANSIG *signals;
772static int signalmax;
773
774static EV_ATOMIC_T gotsig;
775
776void inline_size
777signals_init (ANSIG *base, int count)
778{
779 while (count--)
780 {
781 base->head = 0;
782 base->gotsig = 0;
783
784 ++base;
785 }
786}
787
788/*****************************************************************************/
789
790void inline_speed
791fd_intern (int fd) 2222fd_intern (int fd)
792{ 2223{
793#ifdef _WIN32 2224#ifdef _WIN32
794 int arg = 1; 2225 unsigned long arg = 1;
795 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 2226 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
796#else 2227#else
797 fcntl (fd, F_SETFD, FD_CLOEXEC); 2228 fcntl (fd, F_SETFD, FD_CLOEXEC);
798 fcntl (fd, F_SETFL, O_NONBLOCK); 2229 fcntl (fd, F_SETFL, O_NONBLOCK);
799#endif 2230#endif
800} 2231}
801 2232
802static void noinline 2233/*****************************************************************************/
2234
2235/*
2236 * the heap functions want a real array index. array index 0 is guaranteed to not
2237 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2238 * the branching factor of the d-tree.
2239 */
2240
2241/*
2242 * at the moment we allow libev the luxury of two heaps,
2243 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2244 * which is more cache-efficient.
2245 * the difference is about 5% with 50000+ watchers.
2246 */
2247#if EV_USE_4HEAP
2248
2249#define DHEAP 4
2250#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2251#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2252#define UPHEAP_DONE(p,k) ((p) == (k))
2253
2254/* away from the root */
2255inline_speed void
2256downheap (ANHE *heap, int N, int k)
2257{
2258 ANHE he = heap [k];
2259 ANHE *E = heap + N + HEAP0;
2260
2261 for (;;)
2262 {
2263 ev_tstamp minat;
2264 ANHE *minpos;
2265 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2266
2267 /* find minimum child */
2268 if (expect_true (pos + DHEAP - 1 < E))
2269 {
2270 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2271 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2272 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2273 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2274 }
2275 else if (pos < E)
2276 {
2277 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2278 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2279 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2280 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2281 }
2282 else
2283 break;
2284
2285 if (ANHE_at (he) <= minat)
2286 break;
2287
2288 heap [k] = *minpos;
2289 ev_active (ANHE_w (*minpos)) = k;
2290
2291 k = minpos - heap;
2292 }
2293
2294 heap [k] = he;
2295 ev_active (ANHE_w (he)) = k;
2296}
2297
2298#else /* 4HEAP */
2299
2300#define HEAP0 1
2301#define HPARENT(k) ((k) >> 1)
2302#define UPHEAP_DONE(p,k) (!(p))
2303
2304/* away from the root */
2305inline_speed void
2306downheap (ANHE *heap, int N, int k)
2307{
2308 ANHE he = heap [k];
2309
2310 for (;;)
2311 {
2312 int c = k << 1;
2313
2314 if (c >= N + HEAP0)
2315 break;
2316
2317 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2318 ? 1 : 0;
2319
2320 if (ANHE_at (he) <= ANHE_at (heap [c]))
2321 break;
2322
2323 heap [k] = heap [c];
2324 ev_active (ANHE_w (heap [k])) = k;
2325
2326 k = c;
2327 }
2328
2329 heap [k] = he;
2330 ev_active (ANHE_w (he)) = k;
2331}
2332#endif
2333
2334/* towards the root */
2335inline_speed void
2336upheap (ANHE *heap, int k)
2337{
2338 ANHE he = heap [k];
2339
2340 for (;;)
2341 {
2342 int p = HPARENT (k);
2343
2344 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2345 break;
2346
2347 heap [k] = heap [p];
2348 ev_active (ANHE_w (heap [k])) = k;
2349 k = p;
2350 }
2351
2352 heap [k] = he;
2353 ev_active (ANHE_w (he)) = k;
2354}
2355
2356/* move an element suitably so it is in a correct place */
2357inline_size void
2358adjustheap (ANHE *heap, int N, int k)
2359{
2360 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2361 upheap (heap, k);
2362 else
2363 downheap (heap, N, k);
2364}
2365
2366/* rebuild the heap: this function is used only once and executed rarely */
2367inline_size void
2368reheap (ANHE *heap, int N)
2369{
2370 int i;
2371
2372 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2373 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2374 for (i = 0; i < N; ++i)
2375 upheap (heap, i + HEAP0);
2376}
2377
2378/*****************************************************************************/
2379
2380/* associate signal watchers to a signal signal */
2381typedef struct
2382{
2383 EV_ATOMIC_T pending;
2384#if EV_MULTIPLICITY
2385 EV_P;
2386#endif
2387 WL head;
2388} ANSIG;
2389
2390static ANSIG signals [EV_NSIG - 1];
2391
2392/*****************************************************************************/
2393
2394#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2395
2396noinline ecb_cold
2397static void
803evpipe_init (EV_P) 2398evpipe_init (EV_P)
804{ 2399{
805 if (!ev_is_active (&pipeev)) 2400 if (!ev_is_active (&pipe_w))
806 { 2401 {
2402 int fds [2];
2403
2404# if EV_USE_EVENTFD
2405 fds [0] = -1;
2406 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2407 if (fds [1] < 0 && errno == EINVAL)
2408 fds [1] = eventfd (0, 0);
2409
2410 if (fds [1] < 0)
2411# endif
2412 {
807 while (pipe (evpipe)) 2413 while (pipe (fds))
808 syserr ("(libev) error creating signal/async pipe"); 2414 ev_syserr ("(libev) error creating signal/async pipe");
809 2415
810 fd_intern (evpipe [0]); 2416 fd_intern (fds [0]);
2417 }
2418
2419 evpipe [0] = fds [0];
2420
2421 if (evpipe [1] < 0)
2422 evpipe [1] = fds [1]; /* first call, set write fd */
2423 else
2424 {
2425 /* on subsequent calls, do not change evpipe [1] */
2426 /* so that evpipe_write can always rely on its value. */
2427 /* this branch does not do anything sensible on windows, */
2428 /* so must not be executed on windows */
2429
2430 dup2 (fds [1], evpipe [1]);
2431 close (fds [1]);
2432 }
2433
811 fd_intern (evpipe [1]); 2434 fd_intern (evpipe [1]);
812 2435
813 ev_io_set (&pipeev, evpipe [0], EV_READ); 2436 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
814 ev_io_start (EV_A_ &pipeev); 2437 ev_io_start (EV_A_ &pipe_w);
815 ev_unref (EV_A); /* watcher should not keep loop alive */ 2438 ev_unref (EV_A); /* watcher should not keep loop alive */
816 } 2439 }
817} 2440}
818 2441
819void inline_size 2442inline_speed void
820evpipe_write (EV_P_ EV_ATOMIC_T *flag) 2443evpipe_write (EV_P_ EV_ATOMIC_T *flag)
821{ 2444{
822 if (!*flag) 2445 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2446
2447 if (expect_true (*flag))
2448 return;
2449
2450 *flag = 1;
2451 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2452
2453 pipe_write_skipped = 1;
2454
2455 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2456
2457 if (pipe_write_wanted)
823 { 2458 {
2459 int old_errno;
2460
2461 pipe_write_skipped = 0;
2462 ECB_MEMORY_FENCE_RELEASE;
2463
824 int old_errno = errno; /* save errno becaue write might clobber it */ 2464 old_errno = errno; /* save errno because write will clobber it */
825 2465
826 *flag = 1; 2466#if EV_USE_EVENTFD
827 write (evpipe [1], &old_errno, 1); 2467 if (evpipe [0] < 0)
2468 {
2469 uint64_t counter = 1;
2470 write (evpipe [1], &counter, sizeof (uint64_t));
2471 }
2472 else
2473#endif
2474 {
2475#ifdef _WIN32
2476 WSABUF buf;
2477 DWORD sent;
2478 buf.buf = &buf;
2479 buf.len = 1;
2480 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2481#else
2482 write (evpipe [1], &(evpipe [1]), 1);
2483#endif
2484 }
828 2485
829 errno = old_errno; 2486 errno = old_errno;
830 } 2487 }
831} 2488}
832 2489
2490/* called whenever the libev signal pipe */
2491/* got some events (signal, async) */
833static void 2492static void
834pipecb (EV_P_ ev_io *iow, int revents) 2493pipecb (EV_P_ ev_io *iow, int revents)
835{ 2494{
2495 int i;
2496
2497 if (revents & EV_READ)
836 { 2498 {
837 int dummy; 2499#if EV_USE_EVENTFD
2500 if (evpipe [0] < 0)
2501 {
2502 uint64_t counter;
2503 read (evpipe [1], &counter, sizeof (uint64_t));
2504 }
2505 else
2506#endif
2507 {
2508 char dummy[4];
2509#ifdef _WIN32
2510 WSABUF buf;
2511 DWORD recvd;
2512 DWORD flags = 0;
2513 buf.buf = dummy;
2514 buf.len = sizeof (dummy);
2515 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2516#else
838 read (evpipe [0], &dummy, 1); 2517 read (evpipe [0], &dummy, sizeof (dummy));
2518#endif
2519 }
839 } 2520 }
840 2521
841 if (gotsig && ev_is_default_loop (EV_A)) 2522 pipe_write_skipped = 0;
842 {
843 int signum;
844 gotsig = 0;
845 2523
846 for (signum = signalmax; signum--; ) 2524 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
847 if (signals [signum].gotsig) 2525
2526#if EV_SIGNAL_ENABLE
2527 if (sig_pending)
2528 {
2529 sig_pending = 0;
2530
2531 ECB_MEMORY_FENCE;
2532
2533 for (i = EV_NSIG - 1; i--; )
2534 if (expect_false (signals [i].pending))
848 ev_feed_signal_event (EV_A_ signum + 1); 2535 ev_feed_signal_event (EV_A_ i + 1);
849 } 2536 }
2537#endif
850 2538
851#if EV_ASYNC_ENABLE 2539#if EV_ASYNC_ENABLE
852 if (gotasync) 2540 if (async_pending)
853 { 2541 {
854 int i; 2542 async_pending = 0;
855 gotasync = 0; 2543
2544 ECB_MEMORY_FENCE;
856 2545
857 for (i = asynccnt; i--; ) 2546 for (i = asynccnt; i--; )
858 if (asyncs [i]->sent) 2547 if (asyncs [i]->sent)
859 { 2548 {
860 asyncs [i]->sent = 0; 2549 asyncs [i]->sent = 0;
2550 ECB_MEMORY_FENCE_RELEASE;
861 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2551 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
862 } 2552 }
863 } 2553 }
864#endif 2554#endif
865} 2555}
866 2556
867/*****************************************************************************/ 2557/*****************************************************************************/
868 2558
2559void
2560ev_feed_signal (int signum) EV_THROW
2561{
2562#if EV_MULTIPLICITY
2563 EV_P;
2564 ECB_MEMORY_FENCE_ACQUIRE;
2565 EV_A = signals [signum - 1].loop;
2566
2567 if (!EV_A)
2568 return;
2569#endif
2570
2571 signals [signum - 1].pending = 1;
2572 evpipe_write (EV_A_ &sig_pending);
2573}
2574
869static void 2575static void
870sighandler (int signum) 2576ev_sighandler (int signum)
871{ 2577{
2578#ifdef _WIN32
2579 signal (signum, ev_sighandler);
2580#endif
2581
2582 ev_feed_signal (signum);
2583}
2584
2585noinline
2586void
2587ev_feed_signal_event (EV_P_ int signum) EV_THROW
2588{
2589 WL w;
2590
2591 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2592 return;
2593
2594 --signum;
2595
872#if EV_MULTIPLICITY 2596#if EV_MULTIPLICITY
873 struct ev_loop *loop = &default_loop_struct; 2597 /* it is permissible to try to feed a signal to the wrong loop */
874#endif 2598 /* or, likely more useful, feeding a signal nobody is waiting for */
875 2599
876#if _WIN32 2600 if (expect_false (signals [signum].loop != EV_A))
877 signal (signum, sighandler);
878#endif
879
880 signals [signum - 1].gotsig = 1;
881 evpipe_write (EV_A_ &gotsig);
882}
883
884void noinline
885ev_feed_signal_event (EV_P_ int signum)
886{
887 WL w;
888
889#if EV_MULTIPLICITY
890 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
891#endif
892
893 --signum;
894
895 if (signum < 0 || signum >= signalmax)
896 return; 2601 return;
2602#endif
897 2603
898 signals [signum].gotsig = 0; 2604 signals [signum].pending = 0;
2605 ECB_MEMORY_FENCE_RELEASE;
899 2606
900 for (w = signals [signum].head; w; w = w->next) 2607 for (w = signals [signum].head; w; w = w->next)
901 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2608 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
902} 2609}
903 2610
2611#if EV_USE_SIGNALFD
2612static void
2613sigfdcb (EV_P_ ev_io *iow, int revents)
2614{
2615 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2616
2617 for (;;)
2618 {
2619 ssize_t res = read (sigfd, si, sizeof (si));
2620
2621 /* not ISO-C, as res might be -1, but works with SuS */
2622 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2623 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2624
2625 if (res < (ssize_t)sizeof (si))
2626 break;
2627 }
2628}
2629#endif
2630
2631#endif
2632
904/*****************************************************************************/ 2633/*****************************************************************************/
905 2634
2635#if EV_CHILD_ENABLE
906static WL childs [EV_PID_HASHSIZE]; 2636static WL childs [EV_PID_HASHSIZE];
907
908#ifndef _WIN32
909 2637
910static ev_signal childev; 2638static ev_signal childev;
911 2639
912#ifndef WIFCONTINUED 2640#ifndef WIFCONTINUED
913# define WIFCONTINUED(status) 0 2641# define WIFCONTINUED(status) 0
914#endif 2642#endif
915 2643
916void inline_speed 2644/* handle a single child status event */
2645inline_speed void
917child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2646child_reap (EV_P_ int chain, int pid, int status)
918{ 2647{
919 ev_child *w; 2648 ev_child *w;
920 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2649 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
921 2650
922 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2651 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
923 { 2652 {
924 if ((w->pid == pid || !w->pid) 2653 if ((w->pid == pid || !w->pid)
925 && (!traced || (w->flags & 1))) 2654 && (!traced || (w->flags & 1)))
926 { 2655 {
927 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2656 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
928 w->rpid = pid; 2657 w->rpid = pid;
929 w->rstatus = status; 2658 w->rstatus = status;
930 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2659 ev_feed_event (EV_A_ (W)w, EV_CHILD);
931 } 2660 }
932 } 2661 }
… …
934 2663
935#ifndef WCONTINUED 2664#ifndef WCONTINUED
936# define WCONTINUED 0 2665# define WCONTINUED 0
937#endif 2666#endif
938 2667
2668/* called on sigchld etc., calls waitpid */
939static void 2669static void
940childcb (EV_P_ ev_signal *sw, int revents) 2670childcb (EV_P_ ev_signal *sw, int revents)
941{ 2671{
942 int pid, status; 2672 int pid, status;
943 2673
… …
946 if (!WCONTINUED 2676 if (!WCONTINUED
947 || errno != EINVAL 2677 || errno != EINVAL
948 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2678 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
949 return; 2679 return;
950 2680
951 /* make sure we are called again until all childs have been reaped */ 2681 /* make sure we are called again until all children have been reaped */
952 /* we need to do it this way so that the callback gets called before we continue */ 2682 /* we need to do it this way so that the callback gets called before we continue */
953 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2683 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
954 2684
955 child_reap (EV_A_ sw, pid, pid, status); 2685 child_reap (EV_A_ pid, pid, status);
956 if (EV_PID_HASHSIZE > 1) 2686 if ((EV_PID_HASHSIZE) > 1)
957 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2687 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
958} 2688}
959 2689
960#endif 2690#endif
961 2691
962/*****************************************************************************/ 2692/*****************************************************************************/
963 2693
2694#if EV_USE_IOCP
2695# include "ev_iocp.c"
2696#endif
964#if EV_USE_PORT 2697#if EV_USE_PORT
965# include "ev_port.c" 2698# include "ev_port.c"
966#endif 2699#endif
967#if EV_USE_KQUEUE 2700#if EV_USE_KQUEUE
968# include "ev_kqueue.c" 2701# include "ev_kqueue.c"
… …
975#endif 2708#endif
976#if EV_USE_SELECT 2709#if EV_USE_SELECT
977# include "ev_select.c" 2710# include "ev_select.c"
978#endif 2711#endif
979 2712
980int 2713ecb_cold int
981ev_version_major (void) 2714ev_version_major (void) EV_THROW
982{ 2715{
983 return EV_VERSION_MAJOR; 2716 return EV_VERSION_MAJOR;
984} 2717}
985 2718
986int 2719ecb_cold int
987ev_version_minor (void) 2720ev_version_minor (void) EV_THROW
988{ 2721{
989 return EV_VERSION_MINOR; 2722 return EV_VERSION_MINOR;
990} 2723}
991 2724
992/* return true if we are running with elevated privileges and should ignore env variables */ 2725/* return true if we are running with elevated privileges and should ignore env variables */
993int inline_size 2726inline_size ecb_cold int
994enable_secure (void) 2727enable_secure (void)
995{ 2728{
996#ifdef _WIN32 2729#ifdef _WIN32
997 return 0; 2730 return 0;
998#else 2731#else
999 return getuid () != geteuid () 2732 return getuid () != geteuid ()
1000 || getgid () != getegid (); 2733 || getgid () != getegid ();
1001#endif 2734#endif
1002} 2735}
1003 2736
2737ecb_cold
1004unsigned int 2738unsigned int
1005ev_supported_backends (void) 2739ev_supported_backends (void) EV_THROW
1006{ 2740{
1007 unsigned int flags = 0; 2741 unsigned int flags = 0;
1008 2742
1009 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2743 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1010 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2744 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1013 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2747 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1014 2748
1015 return flags; 2749 return flags;
1016} 2750}
1017 2751
2752ecb_cold
1018unsigned int 2753unsigned int
1019ev_recommended_backends (void) 2754ev_recommended_backends (void) EV_THROW
1020{ 2755{
1021 unsigned int flags = ev_supported_backends (); 2756 unsigned int flags = ev_supported_backends ();
1022 2757
1023#ifndef __NetBSD__ 2758#ifndef __NetBSD__
1024 /* kqueue is borked on everything but netbsd apparently */ 2759 /* kqueue is borked on everything but netbsd apparently */
1025 /* it usually doesn't work correctly on anything but sockets and pipes */ 2760 /* it usually doesn't work correctly on anything but sockets and pipes */
1026 flags &= ~EVBACKEND_KQUEUE; 2761 flags &= ~EVBACKEND_KQUEUE;
1027#endif 2762#endif
1028#ifdef __APPLE__ 2763#ifdef __APPLE__
1029 // flags &= ~EVBACKEND_KQUEUE; for documentation 2764 /* only select works correctly on that "unix-certified" platform */
1030 flags &= ~EVBACKEND_POLL; 2765 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2766 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2767#endif
2768#ifdef __FreeBSD__
2769 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1031#endif 2770#endif
1032 2771
1033 return flags; 2772 return flags;
1034} 2773}
1035 2774
2775ecb_cold
1036unsigned int 2776unsigned int
1037ev_embeddable_backends (void) 2777ev_embeddable_backends (void) EV_THROW
1038{ 2778{
1039 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2779 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1040 2780
1041 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2781 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1042 /* please fix it and tell me how to detect the fix */ 2782 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1043 flags &= ~EVBACKEND_EPOLL; 2783 flags &= ~EVBACKEND_EPOLL;
1044 2784
1045 return flags; 2785 return flags;
1046} 2786}
1047 2787
1048unsigned int 2788unsigned int
1049ev_backend (EV_P) 2789ev_backend (EV_P) EV_THROW
1050{ 2790{
1051 return backend; 2791 return backend;
1052} 2792}
1053 2793
2794#if EV_FEATURE_API
1054unsigned int 2795unsigned int
1055ev_loop_count (EV_P) 2796ev_iteration (EV_P) EV_THROW
1056{ 2797{
1057 return loop_count; 2798 return loop_count;
1058} 2799}
1059 2800
2801unsigned int
2802ev_depth (EV_P) EV_THROW
2803{
2804 return loop_depth;
2805}
2806
1060void 2807void
1061ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2808ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1062{ 2809{
1063 io_blocktime = interval; 2810 io_blocktime = interval;
1064} 2811}
1065 2812
1066void 2813void
1067ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2814ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1068{ 2815{
1069 timeout_blocktime = interval; 2816 timeout_blocktime = interval;
1070} 2817}
1071 2818
1072static void noinline 2819void
2820ev_set_userdata (EV_P_ void *data) EV_THROW
2821{
2822 userdata = data;
2823}
2824
2825void *
2826ev_userdata (EV_P) EV_THROW
2827{
2828 return userdata;
2829}
2830
2831void
2832ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2833{
2834 invoke_cb = invoke_pending_cb;
2835}
2836
2837void
2838ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2839{
2840 release_cb = release;
2841 acquire_cb = acquire;
2842}
2843#endif
2844
2845/* initialise a loop structure, must be zero-initialised */
2846noinline ecb_cold
2847static void
1073loop_init (EV_P_ unsigned int flags) 2848loop_init (EV_P_ unsigned int flags) EV_THROW
1074{ 2849{
1075 if (!backend) 2850 if (!backend)
1076 { 2851 {
2852 origflags = flags;
2853
2854#if EV_USE_REALTIME
2855 if (!have_realtime)
2856 {
2857 struct timespec ts;
2858
2859 if (!clock_gettime (CLOCK_REALTIME, &ts))
2860 have_realtime = 1;
2861 }
2862#endif
2863
1077#if EV_USE_MONOTONIC 2864#if EV_USE_MONOTONIC
2865 if (!have_monotonic)
1078 { 2866 {
1079 struct timespec ts; 2867 struct timespec ts;
2868
1080 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2869 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1081 have_monotonic = 1; 2870 have_monotonic = 1;
1082 } 2871 }
1083#endif
1084
1085 ev_rt_now = ev_time ();
1086 mn_now = get_clock ();
1087 now_floor = mn_now;
1088 rtmn_diff = ev_rt_now - mn_now;
1089
1090 io_blocktime = 0.;
1091 timeout_blocktime = 0.;
1092 backend = 0;
1093 backend_fd = -1;
1094 gotasync = 0;
1095#if EV_USE_INOTIFY
1096 fs_fd = -2;
1097#endif 2872#endif
1098 2873
1099 /* pid check not overridable via env */ 2874 /* pid check not overridable via env */
1100#ifndef _WIN32 2875#ifndef _WIN32
1101 if (flags & EVFLAG_FORKCHECK) 2876 if (flags & EVFLAG_FORKCHECK)
… …
1105 if (!(flags & EVFLAG_NOENV) 2880 if (!(flags & EVFLAG_NOENV)
1106 && !enable_secure () 2881 && !enable_secure ()
1107 && getenv ("LIBEV_FLAGS")) 2882 && getenv ("LIBEV_FLAGS"))
1108 flags = atoi (getenv ("LIBEV_FLAGS")); 2883 flags = atoi (getenv ("LIBEV_FLAGS"));
1109 2884
1110 if (!(flags & 0x0000ffffUL)) 2885 ev_rt_now = ev_time ();
2886 mn_now = get_clock ();
2887 now_floor = mn_now;
2888 rtmn_diff = ev_rt_now - mn_now;
2889#if EV_FEATURE_API
2890 invoke_cb = ev_invoke_pending;
2891#endif
2892
2893 io_blocktime = 0.;
2894 timeout_blocktime = 0.;
2895 backend = 0;
2896 backend_fd = -1;
2897 sig_pending = 0;
2898#if EV_ASYNC_ENABLE
2899 async_pending = 0;
2900#endif
2901 pipe_write_skipped = 0;
2902 pipe_write_wanted = 0;
2903 evpipe [0] = -1;
2904 evpipe [1] = -1;
2905#if EV_USE_INOTIFY
2906 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2907#endif
2908#if EV_USE_SIGNALFD
2909 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2910#endif
2911
2912 if (!(flags & EVBACKEND_MASK))
1111 flags |= ev_recommended_backends (); 2913 flags |= ev_recommended_backends ();
1112 2914
2915#if EV_USE_IOCP
2916 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2917#endif
1113#if EV_USE_PORT 2918#if EV_USE_PORT
1114 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2919 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1115#endif 2920#endif
1116#if EV_USE_KQUEUE 2921#if EV_USE_KQUEUE
1117 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2922 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1124#endif 2929#endif
1125#if EV_USE_SELECT 2930#if EV_USE_SELECT
1126 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2931 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1127#endif 2932#endif
1128 2933
2934 ev_prepare_init (&pending_w, pendingcb);
2935
2936#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1129 ev_init (&pipeev, pipecb); 2937 ev_init (&pipe_w, pipecb);
1130 ev_set_priority (&pipeev, EV_MAXPRI); 2938 ev_set_priority (&pipe_w, EV_MAXPRI);
2939#endif
1131 } 2940 }
1132} 2941}
1133 2942
1134static void noinline 2943/* free up a loop structure */
2944ecb_cold
2945void
1135loop_destroy (EV_P) 2946ev_loop_destroy (EV_P)
1136{ 2947{
1137 int i; 2948 int i;
1138 2949
2950#if EV_MULTIPLICITY
2951 /* mimic free (0) */
2952 if (!EV_A)
2953 return;
2954#endif
2955
2956#if EV_CLEANUP_ENABLE
2957 /* queue cleanup watchers (and execute them) */
2958 if (expect_false (cleanupcnt))
2959 {
2960 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2961 EV_INVOKE_PENDING;
2962 }
2963#endif
2964
2965#if EV_CHILD_ENABLE
2966 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2967 {
2968 ev_ref (EV_A); /* child watcher */
2969 ev_signal_stop (EV_A_ &childev);
2970 }
2971#endif
2972
1139 if (ev_is_active (&pipeev)) 2973 if (ev_is_active (&pipe_w))
1140 { 2974 {
1141 ev_ref (EV_A); /* signal watcher */ 2975 /*ev_ref (EV_A);*/
1142 ev_io_stop (EV_A_ &pipeev); 2976 /*ev_io_stop (EV_A_ &pipe_w);*/
1143 2977
1144 close (evpipe [0]); evpipe [0] = 0; 2978 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1145 close (evpipe [1]); evpipe [1] = 0; 2979 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1146 } 2980 }
2981
2982#if EV_USE_SIGNALFD
2983 if (ev_is_active (&sigfd_w))
2984 close (sigfd);
2985#endif
1147 2986
1148#if EV_USE_INOTIFY 2987#if EV_USE_INOTIFY
1149 if (fs_fd >= 0) 2988 if (fs_fd >= 0)
1150 close (fs_fd); 2989 close (fs_fd);
1151#endif 2990#endif
1152 2991
1153 if (backend_fd >= 0) 2992 if (backend_fd >= 0)
1154 close (backend_fd); 2993 close (backend_fd);
1155 2994
2995#if EV_USE_IOCP
2996 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2997#endif
1156#if EV_USE_PORT 2998#if EV_USE_PORT
1157 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2999 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1158#endif 3000#endif
1159#if EV_USE_KQUEUE 3001#if EV_USE_KQUEUE
1160 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3002 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1175#if EV_IDLE_ENABLE 3017#if EV_IDLE_ENABLE
1176 array_free (idle, [i]); 3018 array_free (idle, [i]);
1177#endif 3019#endif
1178 } 3020 }
1179 3021
1180 ev_free (anfds); anfdmax = 0; 3022 ev_free (anfds); anfds = 0; anfdmax = 0;
1181 3023
1182 /* have to use the microsoft-never-gets-it-right macro */ 3024 /* have to use the microsoft-never-gets-it-right macro */
3025 array_free (rfeed, EMPTY);
1183 array_free (fdchange, EMPTY); 3026 array_free (fdchange, EMPTY);
1184 array_free (timer, EMPTY); 3027 array_free (timer, EMPTY);
1185#if EV_PERIODIC_ENABLE 3028#if EV_PERIODIC_ENABLE
1186 array_free (periodic, EMPTY); 3029 array_free (periodic, EMPTY);
1187#endif 3030#endif
1188#if EV_FORK_ENABLE 3031#if EV_FORK_ENABLE
1189 array_free (fork, EMPTY); 3032 array_free (fork, EMPTY);
1190#endif 3033#endif
3034#if EV_CLEANUP_ENABLE
3035 array_free (cleanup, EMPTY);
3036#endif
1191 array_free (prepare, EMPTY); 3037 array_free (prepare, EMPTY);
1192 array_free (check, EMPTY); 3038 array_free (check, EMPTY);
1193#if EV_ASYNC_ENABLE 3039#if EV_ASYNC_ENABLE
1194 array_free (async, EMPTY); 3040 array_free (async, EMPTY);
1195#endif 3041#endif
1196 3042
1197 backend = 0; 3043 backend = 0;
1198}
1199 3044
3045#if EV_MULTIPLICITY
3046 if (ev_is_default_loop (EV_A))
3047#endif
3048 ev_default_loop_ptr = 0;
3049#if EV_MULTIPLICITY
3050 else
3051 ev_free (EV_A);
3052#endif
3053}
3054
3055#if EV_USE_INOTIFY
1200void inline_size infy_fork (EV_P); 3056inline_size void infy_fork (EV_P);
3057#endif
1201 3058
1202void inline_size 3059inline_size void
1203loop_fork (EV_P) 3060loop_fork (EV_P)
1204{ 3061{
1205#if EV_USE_PORT 3062#if EV_USE_PORT
1206 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3063 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1207#endif 3064#endif
… …
1213#endif 3070#endif
1214#if EV_USE_INOTIFY 3071#if EV_USE_INOTIFY
1215 infy_fork (EV_A); 3072 infy_fork (EV_A);
1216#endif 3073#endif
1217 3074
1218 if (ev_is_active (&pipeev)) 3075#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3076 if (ev_is_active (&pipe_w) && postfork != 2)
3077 {
3078 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3079
3080 ev_ref (EV_A);
3081 ev_io_stop (EV_A_ &pipe_w);
3082
3083 if (evpipe [0] >= 0)
3084 EV_WIN32_CLOSE_FD (evpipe [0]);
3085
3086 evpipe_init (EV_A);
3087 /* iterate over everything, in case we missed something before */
3088 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1219 { 3089 }
1220 /* this "locks" the handlers against writing to the pipe */ 3090#endif
1221 /* while we modify the fd vars */ 3091
1222 gotsig = 1; 3092 postfork = 0;
3093}
3094
3095#if EV_MULTIPLICITY
3096
3097ecb_cold
3098struct ev_loop *
3099ev_loop_new (unsigned int flags) EV_THROW
3100{
3101 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
3102
3103 memset (EV_A, 0, sizeof (struct ev_loop));
3104 loop_init (EV_A_ flags);
3105
3106 if (ev_backend (EV_A))
3107 return EV_A;
3108
3109 ev_free (EV_A);
3110 return 0;
3111}
3112
3113#endif /* multiplicity */
3114
3115#if EV_VERIFY
3116noinline ecb_cold
3117static void
3118verify_watcher (EV_P_ W w)
3119{
3120 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
3121
3122 if (w->pending)
3123 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
3124}
3125
3126noinline ecb_cold
3127static void
3128verify_heap (EV_P_ ANHE *heap, int N)
3129{
3130 int i;
3131
3132 for (i = HEAP0; i < N + HEAP0; ++i)
3133 {
3134 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
3135 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
3136 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
3137
3138 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
3139 }
3140}
3141
3142noinline ecb_cold
3143static void
3144array_verify (EV_P_ W *ws, int cnt)
3145{
3146 while (cnt--)
3147 {
3148 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
3149 verify_watcher (EV_A_ ws [cnt]);
3150 }
3151}
3152#endif
3153
3154#if EV_FEATURE_API
3155void ecb_cold
3156ev_verify (EV_P) EV_THROW
3157{
3158#if EV_VERIFY
3159 int i;
3160 WL w, w2;
3161
3162 assert (activecnt >= -1);
3163
3164 assert (fdchangemax >= fdchangecnt);
3165 for (i = 0; i < fdchangecnt; ++i)
3166 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3167
3168 assert (anfdmax >= 0);
3169 for (i = 0; i < anfdmax; ++i)
3170 {
3171 int j = 0;
3172
3173 for (w = w2 = anfds [i].head; w; w = w->next)
3174 {
3175 verify_watcher (EV_A_ (W)w);
3176
3177 if (j++ & 1)
3178 {
3179 assert (("libev: io watcher list contains a loop", w != w2));
3180 w2 = w2->next;
3181 }
3182
3183 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3184 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3185 }
3186 }
3187
3188 assert (timermax >= timercnt);
3189 verify_heap (EV_A_ timers, timercnt);
3190
3191#if EV_PERIODIC_ENABLE
3192 assert (periodicmax >= periodiccnt);
3193 verify_heap (EV_A_ periodics, periodiccnt);
3194#endif
3195
3196 for (i = NUMPRI; i--; )
3197 {
3198 assert (pendingmax [i] >= pendingcnt [i]);
3199#if EV_IDLE_ENABLE
3200 assert (idleall >= 0);
3201 assert (idlemax [i] >= idlecnt [i]);
3202 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3203#endif
3204 }
3205
3206#if EV_FORK_ENABLE
3207 assert (forkmax >= forkcnt);
3208 array_verify (EV_A_ (W *)forks, forkcnt);
3209#endif
3210
3211#if EV_CLEANUP_ENABLE
3212 assert (cleanupmax >= cleanupcnt);
3213 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3214#endif
3215
1223#if EV_ASYNC_ENABLE 3216#if EV_ASYNC_ENABLE
1224 gotasync = 1; 3217 assert (asyncmax >= asynccnt);
3218 array_verify (EV_A_ (W *)asyncs, asynccnt);
3219#endif
3220
3221#if EV_PREPARE_ENABLE
3222 assert (preparemax >= preparecnt);
3223 array_verify (EV_A_ (W *)prepares, preparecnt);
3224#endif
3225
3226#if EV_CHECK_ENABLE
3227 assert (checkmax >= checkcnt);
3228 array_verify (EV_A_ (W *)checks, checkcnt);
3229#endif
3230
3231# if 0
3232#if EV_CHILD_ENABLE
3233 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3234 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3235#endif
1225#endif 3236# endif
1226 3237#endif
1227 ev_ref (EV_A);
1228 ev_io_stop (EV_A_ &pipeev);
1229 close (evpipe [0]);
1230 close (evpipe [1]);
1231
1232 evpipe_init (EV_A);
1233 /* now iterate over everything, in case we missed something */
1234 pipecb (EV_A_ &pipeev, EV_READ);
1235 }
1236
1237 postfork = 0;
1238} 3238}
3239#endif
1239 3240
1240#if EV_MULTIPLICITY 3241#if EV_MULTIPLICITY
3242ecb_cold
1241struct ev_loop * 3243struct ev_loop *
1242ev_loop_new (unsigned int flags) 3244#else
1243{ 3245int
1244 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1245
1246 memset (loop, 0, sizeof (struct ev_loop));
1247
1248 loop_init (EV_A_ flags);
1249
1250 if (ev_backend (EV_A))
1251 return loop;
1252
1253 return 0;
1254}
1255
1256void
1257ev_loop_destroy (EV_P)
1258{
1259 loop_destroy (EV_A);
1260 ev_free (loop);
1261}
1262
1263void
1264ev_loop_fork (EV_P)
1265{
1266 postfork = 1; /* must be in line with ev_default_fork */
1267}
1268
1269#endif 3246#endif
1270 3247ev_default_loop (unsigned int flags) EV_THROW
3248{
3249 if (!ev_default_loop_ptr)
3250 {
1271#if EV_MULTIPLICITY 3251#if EV_MULTIPLICITY
1272struct ev_loop *
1273ev_default_loop_init (unsigned int flags)
1274#else
1275int
1276ev_default_loop (unsigned int flags)
1277#endif
1278{
1279 if (!ev_default_loop_ptr)
1280 {
1281#if EV_MULTIPLICITY
1282 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3252 EV_P = ev_default_loop_ptr = &default_loop_struct;
1283#else 3253#else
1284 ev_default_loop_ptr = 1; 3254 ev_default_loop_ptr = 1;
1285#endif 3255#endif
1286 3256
1287 loop_init (EV_A_ flags); 3257 loop_init (EV_A_ flags);
1288 3258
1289 if (ev_backend (EV_A)) 3259 if (ev_backend (EV_A))
1290 { 3260 {
1291#ifndef _WIN32 3261#if EV_CHILD_ENABLE
1292 ev_signal_init (&childev, childcb, SIGCHLD); 3262 ev_signal_init (&childev, childcb, SIGCHLD);
1293 ev_set_priority (&childev, EV_MAXPRI); 3263 ev_set_priority (&childev, EV_MAXPRI);
1294 ev_signal_start (EV_A_ &childev); 3264 ev_signal_start (EV_A_ &childev);
1295 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3265 ev_unref (EV_A); /* child watcher should not keep loop alive */
1296#endif 3266#endif
… …
1301 3271
1302 return ev_default_loop_ptr; 3272 return ev_default_loop_ptr;
1303} 3273}
1304 3274
1305void 3275void
1306ev_default_destroy (void) 3276ev_loop_fork (EV_P) EV_THROW
1307{ 3277{
1308#if EV_MULTIPLICITY 3278 postfork = 1;
1309 struct ev_loop *loop = ev_default_loop_ptr;
1310#endif
1311
1312#ifndef _WIN32
1313 ev_ref (EV_A); /* child watcher */
1314 ev_signal_stop (EV_A_ &childev);
1315#endif
1316
1317 loop_destroy (EV_A);
1318}
1319
1320void
1321ev_default_fork (void)
1322{
1323#if EV_MULTIPLICITY
1324 struct ev_loop *loop = ev_default_loop_ptr;
1325#endif
1326
1327 if (backend)
1328 postfork = 1; /* must be in line with ev_loop_fork */
1329} 3279}
1330 3280
1331/*****************************************************************************/ 3281/*****************************************************************************/
1332 3282
1333void 3283void
1334ev_invoke (EV_P_ void *w, int revents) 3284ev_invoke (EV_P_ void *w, int revents)
1335{ 3285{
1336 EV_CB_INVOKE ((W)w, revents); 3286 EV_CB_INVOKE ((W)w, revents);
1337} 3287}
1338 3288
1339void inline_speed 3289unsigned int
1340call_pending (EV_P) 3290ev_pending_count (EV_P) EV_THROW
1341{ 3291{
1342 int pri; 3292 int pri;
3293 unsigned int count = 0;
1343 3294
1344 for (pri = NUMPRI; pri--; ) 3295 for (pri = NUMPRI; pri--; )
3296 count += pendingcnt [pri];
3297
3298 return count;
3299}
3300
3301noinline
3302void
3303ev_invoke_pending (EV_P)
3304{
3305 pendingpri = NUMPRI;
3306
3307 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3308 {
3309 --pendingpri;
3310
1345 while (pendingcnt [pri]) 3311 while (pendingcnt [pendingpri])
1346 {
1347 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1348
1349 if (expect_true (p->w))
1350 {
1351 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1352
1353 p->w->pending = 0;
1354 EV_CB_INVOKE (p->w, p->events);
1355 }
1356 }
1357}
1358
1359void inline_size
1360timers_reify (EV_P)
1361{
1362 while (timercnt && ((WT)timers [0])->at <= mn_now)
1363 {
1364 ev_timer *w = (ev_timer *)timers [0];
1365
1366 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1367
1368 /* first reschedule or stop timer */
1369 if (w->repeat)
1370 { 3312 {
1371 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3313 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1372 3314
1373 ((WT)w)->at += w->repeat; 3315 p->w->pending = 0;
1374 if (((WT)w)->at < mn_now) 3316 EV_CB_INVOKE (p->w, p->events);
1375 ((WT)w)->at = mn_now; 3317 EV_FREQUENT_CHECK;
1376
1377 downheap (timers, timercnt, 0);
1378 } 3318 }
1379 else
1380 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1381
1382 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1383 }
1384}
1385
1386#if EV_PERIODIC_ENABLE
1387void inline_size
1388periodics_reify (EV_P)
1389{
1390 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1391 { 3319 }
1392 ev_periodic *w = (ev_periodic *)periodics [0];
1393
1394 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1395
1396 /* first reschedule or stop timer */
1397 if (w->reschedule_cb)
1398 {
1399 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1400 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1401 downheap (periodics, periodiccnt, 0);
1402 }
1403 else if (w->interval)
1404 {
1405 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1406 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1407 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1408 downheap (periodics, periodiccnt, 0);
1409 }
1410 else
1411 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1412
1413 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1414 }
1415} 3320}
1416
1417static void noinline
1418periodics_reschedule (EV_P)
1419{
1420 int i;
1421
1422 /* adjust periodics after time jump */
1423 for (i = 0; i < periodiccnt; ++i)
1424 {
1425 ev_periodic *w = (ev_periodic *)periodics [i];
1426
1427 if (w->reschedule_cb)
1428 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1429 else if (w->interval)
1430 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1431 }
1432
1433 /* now rebuild the heap */
1434 for (i = periodiccnt >> 1; i--; )
1435 downheap (periodics, periodiccnt, i);
1436}
1437#endif
1438 3321
1439#if EV_IDLE_ENABLE 3322#if EV_IDLE_ENABLE
1440void inline_size 3323/* make idle watchers pending. this handles the "call-idle */
3324/* only when higher priorities are idle" logic */
3325inline_size void
1441idle_reify (EV_P) 3326idle_reify (EV_P)
1442{ 3327{
1443 if (expect_false (idleall)) 3328 if (expect_false (idleall))
1444 { 3329 {
1445 int pri; 3330 int pri;
… …
1457 } 3342 }
1458 } 3343 }
1459} 3344}
1460#endif 3345#endif
1461 3346
1462void inline_speed 3347/* make timers pending */
3348inline_size void
3349timers_reify (EV_P)
3350{
3351 EV_FREQUENT_CHECK;
3352
3353 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3354 {
3355 do
3356 {
3357 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3358
3359 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3360
3361 /* first reschedule or stop timer */
3362 if (w->repeat)
3363 {
3364 ev_at (w) += w->repeat;
3365 if (ev_at (w) < mn_now)
3366 ev_at (w) = mn_now;
3367
3368 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3369
3370 ANHE_at_cache (timers [HEAP0]);
3371 downheap (timers, timercnt, HEAP0);
3372 }
3373 else
3374 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3375
3376 EV_FREQUENT_CHECK;
3377 feed_reverse (EV_A_ (W)w);
3378 }
3379 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3380
3381 feed_reverse_done (EV_A_ EV_TIMER);
3382 }
3383}
3384
3385#if EV_PERIODIC_ENABLE
3386
3387noinline
3388static void
3389periodic_recalc (EV_P_ ev_periodic *w)
3390{
3391 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3392 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3393
3394 /* the above almost always errs on the low side */
3395 while (at <= ev_rt_now)
3396 {
3397 ev_tstamp nat = at + w->interval;
3398
3399 /* when resolution fails us, we use ev_rt_now */
3400 if (expect_false (nat == at))
3401 {
3402 at = ev_rt_now;
3403 break;
3404 }
3405
3406 at = nat;
3407 }
3408
3409 ev_at (w) = at;
3410}
3411
3412/* make periodics pending */
3413inline_size void
3414periodics_reify (EV_P)
3415{
3416 EV_FREQUENT_CHECK;
3417
3418 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3419 {
3420 do
3421 {
3422 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3423
3424 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3425
3426 /* first reschedule or stop timer */
3427 if (w->reschedule_cb)
3428 {
3429 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3430
3431 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3432
3433 ANHE_at_cache (periodics [HEAP0]);
3434 downheap (periodics, periodiccnt, HEAP0);
3435 }
3436 else if (w->interval)
3437 {
3438 periodic_recalc (EV_A_ w);
3439 ANHE_at_cache (periodics [HEAP0]);
3440 downheap (periodics, periodiccnt, HEAP0);
3441 }
3442 else
3443 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3444
3445 EV_FREQUENT_CHECK;
3446 feed_reverse (EV_A_ (W)w);
3447 }
3448 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3449
3450 feed_reverse_done (EV_A_ EV_PERIODIC);
3451 }
3452}
3453
3454/* simply recalculate all periodics */
3455/* TODO: maybe ensure that at least one event happens when jumping forward? */
3456noinline ecb_cold
3457static void
3458periodics_reschedule (EV_P)
3459{
3460 int i;
3461
3462 /* adjust periodics after time jump */
3463 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3464 {
3465 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3466
3467 if (w->reschedule_cb)
3468 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3469 else if (w->interval)
3470 periodic_recalc (EV_A_ w);
3471
3472 ANHE_at_cache (periodics [i]);
3473 }
3474
3475 reheap (periodics, periodiccnt);
3476}
3477#endif
3478
3479/* adjust all timers by a given offset */
3480noinline ecb_cold
3481static void
3482timers_reschedule (EV_P_ ev_tstamp adjust)
3483{
3484 int i;
3485
3486 for (i = 0; i < timercnt; ++i)
3487 {
3488 ANHE *he = timers + i + HEAP0;
3489 ANHE_w (*he)->at += adjust;
3490 ANHE_at_cache (*he);
3491 }
3492}
3493
3494/* fetch new monotonic and realtime times from the kernel */
3495/* also detect if there was a timejump, and act accordingly */
3496inline_speed void
1463time_update (EV_P_ ev_tstamp max_block) 3497time_update (EV_P_ ev_tstamp max_block)
1464{ 3498{
1465 int i;
1466
1467#if EV_USE_MONOTONIC 3499#if EV_USE_MONOTONIC
1468 if (expect_true (have_monotonic)) 3500 if (expect_true (have_monotonic))
1469 { 3501 {
3502 int i;
1470 ev_tstamp odiff = rtmn_diff; 3503 ev_tstamp odiff = rtmn_diff;
1471 3504
1472 mn_now = get_clock (); 3505 mn_now = get_clock ();
1473 3506
1474 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3507 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1490 * doesn't hurt either as we only do this on time-jumps or 3523 * doesn't hurt either as we only do this on time-jumps or
1491 * in the unlikely event of having been preempted here. 3524 * in the unlikely event of having been preempted here.
1492 */ 3525 */
1493 for (i = 4; --i; ) 3526 for (i = 4; --i; )
1494 { 3527 {
3528 ev_tstamp diff;
1495 rtmn_diff = ev_rt_now - mn_now; 3529 rtmn_diff = ev_rt_now - mn_now;
1496 3530
1497 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 3531 diff = odiff - rtmn_diff;
3532
3533 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1498 return; /* all is well */ 3534 return; /* all is well */
1499 3535
1500 ev_rt_now = ev_time (); 3536 ev_rt_now = ev_time ();
1501 mn_now = get_clock (); 3537 mn_now = get_clock ();
1502 now_floor = mn_now; 3538 now_floor = mn_now;
1503 } 3539 }
1504 3540
3541 /* no timer adjustment, as the monotonic clock doesn't jump */
3542 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1505# if EV_PERIODIC_ENABLE 3543# if EV_PERIODIC_ENABLE
1506 periodics_reschedule (EV_A); 3544 periodics_reschedule (EV_A);
1507# endif 3545# endif
1508 /* no timer adjustment, as the monotonic clock doesn't jump */
1509 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1510 } 3546 }
1511 else 3547 else
1512#endif 3548#endif
1513 { 3549 {
1514 ev_rt_now = ev_time (); 3550 ev_rt_now = ev_time ();
1515 3551
1516 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3552 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1517 { 3553 {
3554 /* adjust timers. this is easy, as the offset is the same for all of them */
3555 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1518#if EV_PERIODIC_ENABLE 3556#if EV_PERIODIC_ENABLE
1519 periodics_reschedule (EV_A); 3557 periodics_reschedule (EV_A);
1520#endif 3558#endif
1521 /* adjust timers. this is easy, as the offset is the same for all of them */
1522 for (i = 0; i < timercnt; ++i)
1523 ((WT)timers [i])->at += ev_rt_now - mn_now;
1524 } 3559 }
1525 3560
1526 mn_now = ev_rt_now; 3561 mn_now = ev_rt_now;
1527 } 3562 }
1528} 3563}
1529 3564
1530void 3565int
1531ev_ref (EV_P)
1532{
1533 ++activecnt;
1534}
1535
1536void
1537ev_unref (EV_P)
1538{
1539 --activecnt;
1540}
1541
1542static int loop_done;
1543
1544void
1545ev_loop (EV_P_ int flags) 3566ev_run (EV_P_ int flags)
1546{ 3567{
1547 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 3568#if EV_FEATURE_API
1548 ? EVUNLOOP_ONE 3569 ++loop_depth;
1549 : EVUNLOOP_CANCEL; 3570#endif
1550 3571
3572 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3573
3574 loop_done = EVBREAK_CANCEL;
3575
1551 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3576 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1552 3577
1553 do 3578 do
1554 { 3579 {
3580#if EV_VERIFY >= 2
3581 ev_verify (EV_A);
3582#endif
3583
1555#ifndef _WIN32 3584#ifndef _WIN32
1556 if (expect_false (curpid)) /* penalise the forking check even more */ 3585 if (expect_false (curpid)) /* penalise the forking check even more */
1557 if (expect_false (getpid () != curpid)) 3586 if (expect_false (getpid () != curpid))
1558 { 3587 {
1559 curpid = getpid (); 3588 curpid = getpid ();
… …
1565 /* we might have forked, so queue fork handlers */ 3594 /* we might have forked, so queue fork handlers */
1566 if (expect_false (postfork)) 3595 if (expect_false (postfork))
1567 if (forkcnt) 3596 if (forkcnt)
1568 { 3597 {
1569 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3598 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1570 call_pending (EV_A); 3599 EV_INVOKE_PENDING;
1571 } 3600 }
1572#endif 3601#endif
1573 3602
3603#if EV_PREPARE_ENABLE
1574 /* queue prepare watchers (and execute them) */ 3604 /* queue prepare watchers (and execute them) */
1575 if (expect_false (preparecnt)) 3605 if (expect_false (preparecnt))
1576 { 3606 {
1577 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3607 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1578 call_pending (EV_A); 3608 EV_INVOKE_PENDING;
1579 } 3609 }
3610#endif
1580 3611
1581 if (expect_false (!activecnt)) 3612 if (expect_false (loop_done))
1582 break; 3613 break;
1583 3614
1584 /* we might have forked, so reify kernel state if necessary */ 3615 /* we might have forked, so reify kernel state if necessary */
1585 if (expect_false (postfork)) 3616 if (expect_false (postfork))
1586 loop_fork (EV_A); 3617 loop_fork (EV_A);
… …
1591 /* calculate blocking time */ 3622 /* calculate blocking time */
1592 { 3623 {
1593 ev_tstamp waittime = 0.; 3624 ev_tstamp waittime = 0.;
1594 ev_tstamp sleeptime = 0.; 3625 ev_tstamp sleeptime = 0.;
1595 3626
3627 /* remember old timestamp for io_blocktime calculation */
3628 ev_tstamp prev_mn_now = mn_now;
3629
3630 /* update time to cancel out callback processing overhead */
3631 time_update (EV_A_ 1e100);
3632
3633 /* from now on, we want a pipe-wake-up */
3634 pipe_write_wanted = 1;
3635
3636 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3637
1596 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3638 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1597 { 3639 {
1598 /* update time to cancel out callback processing overhead */
1599 time_update (EV_A_ 1e100);
1600
1601 waittime = MAX_BLOCKTIME; 3640 waittime = MAX_BLOCKTIME;
1602 3641
1603 if (timercnt) 3642 if (timercnt)
1604 { 3643 {
1605 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3644 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1606 if (waittime > to) waittime = to; 3645 if (waittime > to) waittime = to;
1607 } 3646 }
1608 3647
1609#if EV_PERIODIC_ENABLE 3648#if EV_PERIODIC_ENABLE
1610 if (periodiccnt) 3649 if (periodiccnt)
1611 { 3650 {
1612 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3651 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1613 if (waittime > to) waittime = to; 3652 if (waittime > to) waittime = to;
1614 } 3653 }
1615#endif 3654#endif
1616 3655
3656 /* don't let timeouts decrease the waittime below timeout_blocktime */
1617 if (expect_false (waittime < timeout_blocktime)) 3657 if (expect_false (waittime < timeout_blocktime))
1618 waittime = timeout_blocktime; 3658 waittime = timeout_blocktime;
1619 3659
1620 sleeptime = waittime - backend_fudge; 3660 /* at this point, we NEED to wait, so we have to ensure */
3661 /* to pass a minimum nonzero value to the backend */
3662 if (expect_false (waittime < backend_mintime))
3663 waittime = backend_mintime;
1621 3664
3665 /* extra check because io_blocktime is commonly 0 */
1622 if (expect_true (sleeptime > io_blocktime)) 3666 if (expect_false (io_blocktime))
1623 sleeptime = io_blocktime;
1624
1625 if (sleeptime)
1626 { 3667 {
3668 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3669
3670 if (sleeptime > waittime - backend_mintime)
3671 sleeptime = waittime - backend_mintime;
3672
3673 if (expect_true (sleeptime > 0.))
3674 {
1627 ev_sleep (sleeptime); 3675 ev_sleep (sleeptime);
1628 waittime -= sleeptime; 3676 waittime -= sleeptime;
3677 }
1629 } 3678 }
1630 } 3679 }
1631 3680
3681#if EV_FEATURE_API
1632 ++loop_count; 3682 ++loop_count;
3683#endif
3684 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1633 backend_poll (EV_A_ waittime); 3685 backend_poll (EV_A_ waittime);
3686 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3687
3688 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3689
3690 ECB_MEMORY_FENCE_ACQUIRE;
3691 if (pipe_write_skipped)
3692 {
3693 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3694 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3695 }
3696
1634 3697
1635 /* update ev_rt_now, do magic */ 3698 /* update ev_rt_now, do magic */
1636 time_update (EV_A_ waittime + sleeptime); 3699 time_update (EV_A_ waittime + sleeptime);
1637 } 3700 }
1638 3701
… …
1645#if EV_IDLE_ENABLE 3708#if EV_IDLE_ENABLE
1646 /* queue idle watchers unless other events are pending */ 3709 /* queue idle watchers unless other events are pending */
1647 idle_reify (EV_A); 3710 idle_reify (EV_A);
1648#endif 3711#endif
1649 3712
3713#if EV_CHECK_ENABLE
1650 /* queue check watchers, to be executed first */ 3714 /* queue check watchers, to be executed first */
1651 if (expect_false (checkcnt)) 3715 if (expect_false (checkcnt))
1652 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3716 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3717#endif
1653 3718
1654 call_pending (EV_A); 3719 EV_INVOKE_PENDING;
1655
1656 } 3720 }
1657 while (expect_true (activecnt && !loop_done)); 3721 while (expect_true (
3722 activecnt
3723 && !loop_done
3724 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3725 ));
1658 3726
1659 if (loop_done == EVUNLOOP_ONE) 3727 if (loop_done == EVBREAK_ONE)
1660 loop_done = EVUNLOOP_CANCEL; 3728 loop_done = EVBREAK_CANCEL;
1661}
1662 3729
3730#if EV_FEATURE_API
3731 --loop_depth;
3732#endif
3733
3734 return activecnt;
3735}
3736
1663void 3737void
1664ev_unloop (EV_P_ int how) 3738ev_break (EV_P_ int how) EV_THROW
1665{ 3739{
1666 loop_done = how; 3740 loop_done = how;
1667} 3741}
1668 3742
3743void
3744ev_ref (EV_P) EV_THROW
3745{
3746 ++activecnt;
3747}
3748
3749void
3750ev_unref (EV_P) EV_THROW
3751{
3752 --activecnt;
3753}
3754
3755void
3756ev_now_update (EV_P) EV_THROW
3757{
3758 time_update (EV_A_ 1e100);
3759}
3760
3761void
3762ev_suspend (EV_P) EV_THROW
3763{
3764 ev_now_update (EV_A);
3765}
3766
3767void
3768ev_resume (EV_P) EV_THROW
3769{
3770 ev_tstamp mn_prev = mn_now;
3771
3772 ev_now_update (EV_A);
3773 timers_reschedule (EV_A_ mn_now - mn_prev);
3774#if EV_PERIODIC_ENABLE
3775 /* TODO: really do this? */
3776 periodics_reschedule (EV_A);
3777#endif
3778}
3779
1669/*****************************************************************************/ 3780/*****************************************************************************/
3781/* singly-linked list management, used when the expected list length is short */
1670 3782
1671void inline_size 3783inline_size void
1672wlist_add (WL *head, WL elem) 3784wlist_add (WL *head, WL elem)
1673{ 3785{
1674 elem->next = *head; 3786 elem->next = *head;
1675 *head = elem; 3787 *head = elem;
1676} 3788}
1677 3789
1678void inline_size 3790inline_size void
1679wlist_del (WL *head, WL elem) 3791wlist_del (WL *head, WL elem)
1680{ 3792{
1681 while (*head) 3793 while (*head)
1682 { 3794 {
1683 if (*head == elem) 3795 if (expect_true (*head == elem))
1684 { 3796 {
1685 *head = elem->next; 3797 *head = elem->next;
1686 return; 3798 break;
1687 } 3799 }
1688 3800
1689 head = &(*head)->next; 3801 head = &(*head)->next;
1690 } 3802 }
1691} 3803}
1692 3804
1693void inline_speed 3805/* internal, faster, version of ev_clear_pending */
3806inline_speed void
1694clear_pending (EV_P_ W w) 3807clear_pending (EV_P_ W w)
1695{ 3808{
1696 if (w->pending) 3809 if (w->pending)
1697 { 3810 {
1698 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3811 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1699 w->pending = 0; 3812 w->pending = 0;
1700 } 3813 }
1701} 3814}
1702 3815
1703int 3816int
1704ev_clear_pending (EV_P_ void *w) 3817ev_clear_pending (EV_P_ void *w) EV_THROW
1705{ 3818{
1706 W w_ = (W)w; 3819 W w_ = (W)w;
1707 int pending = w_->pending; 3820 int pending = w_->pending;
1708 3821
1709 if (expect_true (pending)) 3822 if (expect_true (pending))
1710 { 3823 {
1711 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3824 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3825 p->w = (W)&pending_w;
1712 w_->pending = 0; 3826 w_->pending = 0;
1713 p->w = 0;
1714 return p->events; 3827 return p->events;
1715 } 3828 }
1716 else 3829 else
1717 return 0; 3830 return 0;
1718} 3831}
1719 3832
1720void inline_size 3833inline_size void
1721pri_adjust (EV_P_ W w) 3834pri_adjust (EV_P_ W w)
1722{ 3835{
1723 int pri = w->priority; 3836 int pri = ev_priority (w);
1724 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3837 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1725 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3838 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1726 w->priority = pri; 3839 ev_set_priority (w, pri);
1727} 3840}
1728 3841
1729void inline_speed 3842inline_speed void
1730ev_start (EV_P_ W w, int active) 3843ev_start (EV_P_ W w, int active)
1731{ 3844{
1732 pri_adjust (EV_A_ w); 3845 pri_adjust (EV_A_ w);
1733 w->active = active; 3846 w->active = active;
1734 ev_ref (EV_A); 3847 ev_ref (EV_A);
1735} 3848}
1736 3849
1737void inline_size 3850inline_size void
1738ev_stop (EV_P_ W w) 3851ev_stop (EV_P_ W w)
1739{ 3852{
1740 ev_unref (EV_A); 3853 ev_unref (EV_A);
1741 w->active = 0; 3854 w->active = 0;
1742} 3855}
1743 3856
1744/*****************************************************************************/ 3857/*****************************************************************************/
1745 3858
1746void noinline 3859noinline
3860void
1747ev_io_start (EV_P_ ev_io *w) 3861ev_io_start (EV_P_ ev_io *w) EV_THROW
1748{ 3862{
1749 int fd = w->fd; 3863 int fd = w->fd;
1750 3864
1751 if (expect_false (ev_is_active (w))) 3865 if (expect_false (ev_is_active (w)))
1752 return; 3866 return;
1753 3867
1754 assert (("ev_io_start called with negative fd", fd >= 0)); 3868 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3869 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3870
3871 EV_FREQUENT_CHECK;
1755 3872
1756 ev_start (EV_A_ (W)w, 1); 3873 ev_start (EV_A_ (W)w, 1);
1757 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3874 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1758 wlist_add (&anfds[fd].head, (WL)w); 3875 wlist_add (&anfds[fd].head, (WL)w);
1759 3876
3877 /* common bug, apparently */
3878 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3879
1760 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3880 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1761 w->events &= ~EV_IOFDSET; 3881 w->events &= ~EV__IOFDSET;
1762}
1763 3882
3883 EV_FREQUENT_CHECK;
3884}
3885
1764void noinline 3886noinline
3887void
1765ev_io_stop (EV_P_ ev_io *w) 3888ev_io_stop (EV_P_ ev_io *w) EV_THROW
1766{ 3889{
1767 clear_pending (EV_A_ (W)w); 3890 clear_pending (EV_A_ (W)w);
1768 if (expect_false (!ev_is_active (w))) 3891 if (expect_false (!ev_is_active (w)))
1769 return; 3892 return;
1770 3893
1771 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3894 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3895
3896 EV_FREQUENT_CHECK;
1772 3897
1773 wlist_del (&anfds[w->fd].head, (WL)w); 3898 wlist_del (&anfds[w->fd].head, (WL)w);
1774 ev_stop (EV_A_ (W)w); 3899 ev_stop (EV_A_ (W)w);
1775 3900
1776 fd_change (EV_A_ w->fd, 1); 3901 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1777}
1778 3902
3903 EV_FREQUENT_CHECK;
3904}
3905
1779void noinline 3906noinline
3907void
1780ev_timer_start (EV_P_ ev_timer *w) 3908ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1781{ 3909{
1782 if (expect_false (ev_is_active (w))) 3910 if (expect_false (ev_is_active (w)))
1783 return; 3911 return;
1784 3912
1785 ((WT)w)->at += mn_now; 3913 ev_at (w) += mn_now;
1786 3914
1787 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3915 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1788 3916
3917 EV_FREQUENT_CHECK;
3918
3919 ++timercnt;
1789 ev_start (EV_A_ (W)w, ++timercnt); 3920 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1790 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3921 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1791 timers [timercnt - 1] = (WT)w; 3922 ANHE_w (timers [ev_active (w)]) = (WT)w;
1792 upheap (timers, timercnt - 1); 3923 ANHE_at_cache (timers [ev_active (w)]);
3924 upheap (timers, ev_active (w));
1793 3925
3926 EV_FREQUENT_CHECK;
3927
1794 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3928 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1795} 3929}
1796 3930
1797void noinline 3931noinline
3932void
1798ev_timer_stop (EV_P_ ev_timer *w) 3933ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1799{ 3934{
1800 clear_pending (EV_A_ (W)w); 3935 clear_pending (EV_A_ (W)w);
1801 if (expect_false (!ev_is_active (w))) 3936 if (expect_false (!ev_is_active (w)))
1802 return; 3937 return;
1803 3938
1804 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3939 EV_FREQUENT_CHECK;
1805 3940
1806 { 3941 {
1807 int active = ((W)w)->active; 3942 int active = ev_active (w);
1808 3943
3944 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3945
3946 --timercnt;
3947
1809 if (expect_true (--active < --timercnt)) 3948 if (expect_true (active < timercnt + HEAP0))
1810 { 3949 {
1811 timers [active] = timers [timercnt]; 3950 timers [active] = timers [timercnt + HEAP0];
1812 adjustheap (timers, timercnt, active); 3951 adjustheap (timers, timercnt, active);
1813 } 3952 }
1814 } 3953 }
1815 3954
1816 ((WT)w)->at -= mn_now; 3955 ev_at (w) -= mn_now;
1817 3956
1818 ev_stop (EV_A_ (W)w); 3957 ev_stop (EV_A_ (W)w);
1819}
1820 3958
3959 EV_FREQUENT_CHECK;
3960}
3961
1821void noinline 3962noinline
3963void
1822ev_timer_again (EV_P_ ev_timer *w) 3964ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1823{ 3965{
3966 EV_FREQUENT_CHECK;
3967
3968 clear_pending (EV_A_ (W)w);
3969
1824 if (ev_is_active (w)) 3970 if (ev_is_active (w))
1825 { 3971 {
1826 if (w->repeat) 3972 if (w->repeat)
1827 { 3973 {
1828 ((WT)w)->at = mn_now + w->repeat; 3974 ev_at (w) = mn_now + w->repeat;
3975 ANHE_at_cache (timers [ev_active (w)]);
1829 adjustheap (timers, timercnt, ((W)w)->active - 1); 3976 adjustheap (timers, timercnt, ev_active (w));
1830 } 3977 }
1831 else 3978 else
1832 ev_timer_stop (EV_A_ w); 3979 ev_timer_stop (EV_A_ w);
1833 } 3980 }
1834 else if (w->repeat) 3981 else if (w->repeat)
1835 { 3982 {
1836 w->at = w->repeat; 3983 ev_at (w) = w->repeat;
1837 ev_timer_start (EV_A_ w); 3984 ev_timer_start (EV_A_ w);
1838 } 3985 }
3986
3987 EV_FREQUENT_CHECK;
3988}
3989
3990ev_tstamp
3991ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3992{
3993 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1839} 3994}
1840 3995
1841#if EV_PERIODIC_ENABLE 3996#if EV_PERIODIC_ENABLE
1842void noinline 3997noinline
3998void
1843ev_periodic_start (EV_P_ ev_periodic *w) 3999ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1844{ 4000{
1845 if (expect_false (ev_is_active (w))) 4001 if (expect_false (ev_is_active (w)))
1846 return; 4002 return;
1847 4003
1848 if (w->reschedule_cb) 4004 if (w->reschedule_cb)
1849 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 4005 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1850 else if (w->interval) 4006 else if (w->interval)
1851 { 4007 {
1852 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 4008 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1853 /* this formula differs from the one in periodic_reify because we do not always round up */ 4009 periodic_recalc (EV_A_ w);
1854 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1855 } 4010 }
1856 else 4011 else
1857 ((WT)w)->at = w->offset; 4012 ev_at (w) = w->offset;
1858 4013
4014 EV_FREQUENT_CHECK;
4015
4016 ++periodiccnt;
1859 ev_start (EV_A_ (W)w, ++periodiccnt); 4017 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1860 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 4018 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1861 periodics [periodiccnt - 1] = (WT)w; 4019 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1862 upheap (periodics, periodiccnt - 1); 4020 ANHE_at_cache (periodics [ev_active (w)]);
4021 upheap (periodics, ev_active (w));
1863 4022
4023 EV_FREQUENT_CHECK;
4024
1864 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 4025 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1865} 4026}
1866 4027
1867void noinline 4028noinline
4029void
1868ev_periodic_stop (EV_P_ ev_periodic *w) 4030ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1869{ 4031{
1870 clear_pending (EV_A_ (W)w); 4032 clear_pending (EV_A_ (W)w);
1871 if (expect_false (!ev_is_active (w))) 4033 if (expect_false (!ev_is_active (w)))
1872 return; 4034 return;
1873 4035
1874 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 4036 EV_FREQUENT_CHECK;
1875 4037
1876 { 4038 {
1877 int active = ((W)w)->active; 4039 int active = ev_active (w);
1878 4040
4041 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
4042
4043 --periodiccnt;
4044
1879 if (expect_true (--active < --periodiccnt)) 4045 if (expect_true (active < periodiccnt + HEAP0))
1880 { 4046 {
1881 periodics [active] = periodics [periodiccnt]; 4047 periodics [active] = periodics [periodiccnt + HEAP0];
1882 adjustheap (periodics, periodiccnt, active); 4048 adjustheap (periodics, periodiccnt, active);
1883 } 4049 }
1884 } 4050 }
1885 4051
1886 ev_stop (EV_A_ (W)w); 4052 ev_stop (EV_A_ (W)w);
1887}
1888 4053
4054 EV_FREQUENT_CHECK;
4055}
4056
1889void noinline 4057noinline
4058void
1890ev_periodic_again (EV_P_ ev_periodic *w) 4059ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1891{ 4060{
1892 /* TODO: use adjustheap and recalculation */ 4061 /* TODO: use adjustheap and recalculation */
1893 ev_periodic_stop (EV_A_ w); 4062 ev_periodic_stop (EV_A_ w);
1894 ev_periodic_start (EV_A_ w); 4063 ev_periodic_start (EV_A_ w);
1895} 4064}
… …
1897 4066
1898#ifndef SA_RESTART 4067#ifndef SA_RESTART
1899# define SA_RESTART 0 4068# define SA_RESTART 0
1900#endif 4069#endif
1901 4070
4071#if EV_SIGNAL_ENABLE
4072
1902void noinline 4073noinline
4074void
1903ev_signal_start (EV_P_ ev_signal *w) 4075ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1904{ 4076{
1905#if EV_MULTIPLICITY
1906 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1907#endif
1908 if (expect_false (ev_is_active (w))) 4077 if (expect_false (ev_is_active (w)))
1909 return; 4078 return;
1910 4079
1911 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 4080 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1912 4081
1913 evpipe_init (EV_A); 4082#if EV_MULTIPLICITY
4083 assert (("libev: a signal must not be attached to two different loops",
4084 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
1914 4085
4086 signals [w->signum - 1].loop = EV_A;
4087 ECB_MEMORY_FENCE_RELEASE;
4088#endif
4089
4090 EV_FREQUENT_CHECK;
4091
4092#if EV_USE_SIGNALFD
4093 if (sigfd == -2)
1915 { 4094 {
1916#ifndef _WIN32 4095 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1917 sigset_t full, prev; 4096 if (sigfd < 0 && errno == EINVAL)
1918 sigfillset (&full); 4097 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1919 sigprocmask (SIG_SETMASK, &full, &prev);
1920#endif
1921 4098
1922 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 4099 if (sigfd >= 0)
4100 {
4101 fd_intern (sigfd); /* doing it twice will not hurt */
1923 4102
1924#ifndef _WIN32 4103 sigemptyset (&sigfd_set);
1925 sigprocmask (SIG_SETMASK, &prev, 0); 4104
1926#endif 4105 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4106 ev_set_priority (&sigfd_w, EV_MAXPRI);
4107 ev_io_start (EV_A_ &sigfd_w);
4108 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4109 }
1927 } 4110 }
4111
4112 if (sigfd >= 0)
4113 {
4114 /* TODO: check .head */
4115 sigaddset (&sigfd_set, w->signum);
4116 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4117
4118 signalfd (sigfd, &sigfd_set, 0);
4119 }
4120#endif
1928 4121
1929 ev_start (EV_A_ (W)w, 1); 4122 ev_start (EV_A_ (W)w, 1);
1930 wlist_add (&signals [w->signum - 1].head, (WL)w); 4123 wlist_add (&signals [w->signum - 1].head, (WL)w);
1931 4124
1932 if (!((WL)w)->next) 4125 if (!((WL)w)->next)
4126# if EV_USE_SIGNALFD
4127 if (sigfd < 0) /*TODO*/
4128# endif
1933 { 4129 {
1934#if _WIN32 4130# ifdef _WIN32
4131 evpipe_init (EV_A);
4132
1935 signal (w->signum, sighandler); 4133 signal (w->signum, ev_sighandler);
1936#else 4134# else
1937 struct sigaction sa; 4135 struct sigaction sa;
4136
4137 evpipe_init (EV_A);
4138
1938 sa.sa_handler = sighandler; 4139 sa.sa_handler = ev_sighandler;
1939 sigfillset (&sa.sa_mask); 4140 sigfillset (&sa.sa_mask);
1940 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4141 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1941 sigaction (w->signum, &sa, 0); 4142 sigaction (w->signum, &sa, 0);
4143
4144 if (origflags & EVFLAG_NOSIGMASK)
4145 {
4146 sigemptyset (&sa.sa_mask);
4147 sigaddset (&sa.sa_mask, w->signum);
4148 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4149 }
1942#endif 4150#endif
1943 } 4151 }
1944}
1945 4152
4153 EV_FREQUENT_CHECK;
4154}
4155
1946void noinline 4156noinline
4157void
1947ev_signal_stop (EV_P_ ev_signal *w) 4158ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1948{ 4159{
1949 clear_pending (EV_A_ (W)w); 4160 clear_pending (EV_A_ (W)w);
1950 if (expect_false (!ev_is_active (w))) 4161 if (expect_false (!ev_is_active (w)))
1951 return; 4162 return;
1952 4163
4164 EV_FREQUENT_CHECK;
4165
1953 wlist_del (&signals [w->signum - 1].head, (WL)w); 4166 wlist_del (&signals [w->signum - 1].head, (WL)w);
1954 ev_stop (EV_A_ (W)w); 4167 ev_stop (EV_A_ (W)w);
1955 4168
1956 if (!signals [w->signum - 1].head) 4169 if (!signals [w->signum - 1].head)
1957 signal (w->signum, SIG_DFL); 4170 {
1958}
1959
1960void
1961ev_child_start (EV_P_ ev_child *w)
1962{
1963#if EV_MULTIPLICITY 4171#if EV_MULTIPLICITY
4172 signals [w->signum - 1].loop = 0; /* unattach from signal */
4173#endif
4174#if EV_USE_SIGNALFD
4175 if (sigfd >= 0)
4176 {
4177 sigset_t ss;
4178
4179 sigemptyset (&ss);
4180 sigaddset (&ss, w->signum);
4181 sigdelset (&sigfd_set, w->signum);
4182
4183 signalfd (sigfd, &sigfd_set, 0);
4184 sigprocmask (SIG_UNBLOCK, &ss, 0);
4185 }
4186 else
4187#endif
4188 signal (w->signum, SIG_DFL);
4189 }
4190
4191 EV_FREQUENT_CHECK;
4192}
4193
4194#endif
4195
4196#if EV_CHILD_ENABLE
4197
4198void
4199ev_child_start (EV_P_ ev_child *w) EV_THROW
4200{
4201#if EV_MULTIPLICITY
1964 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4202 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1965#endif 4203#endif
1966 if (expect_false (ev_is_active (w))) 4204 if (expect_false (ev_is_active (w)))
1967 return; 4205 return;
1968 4206
4207 EV_FREQUENT_CHECK;
4208
1969 ev_start (EV_A_ (W)w, 1); 4209 ev_start (EV_A_ (W)w, 1);
1970 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4210 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1971}
1972 4211
4212 EV_FREQUENT_CHECK;
4213}
4214
1973void 4215void
1974ev_child_stop (EV_P_ ev_child *w) 4216ev_child_stop (EV_P_ ev_child *w) EV_THROW
1975{ 4217{
1976 clear_pending (EV_A_ (W)w); 4218 clear_pending (EV_A_ (W)w);
1977 if (expect_false (!ev_is_active (w))) 4219 if (expect_false (!ev_is_active (w)))
1978 return; 4220 return;
1979 4221
4222 EV_FREQUENT_CHECK;
4223
1980 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4224 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1981 ev_stop (EV_A_ (W)w); 4225 ev_stop (EV_A_ (W)w);
4226
4227 EV_FREQUENT_CHECK;
1982} 4228}
4229
4230#endif
1983 4231
1984#if EV_STAT_ENABLE 4232#if EV_STAT_ENABLE
1985 4233
1986# ifdef _WIN32 4234# ifdef _WIN32
1987# undef lstat 4235# undef lstat
1988# define lstat(a,b) _stati64 (a,b) 4236# define lstat(a,b) _stati64 (a,b)
1989# endif 4237# endif
1990 4238
1991#define DEF_STAT_INTERVAL 5.0074891 4239#define DEF_STAT_INTERVAL 5.0074891
4240#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1992#define MIN_STAT_INTERVAL 0.1074891 4241#define MIN_STAT_INTERVAL 0.1074891
1993 4242
1994static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4243noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1995 4244
1996#if EV_USE_INOTIFY 4245#if EV_USE_INOTIFY
1997# define EV_INOTIFY_BUFSIZE 8192
1998 4246
1999static void noinline 4247/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4248# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4249
4250noinline
4251static void
2000infy_add (EV_P_ ev_stat *w) 4252infy_add (EV_P_ ev_stat *w)
2001{ 4253{
2002 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); 4254 w->wd = inotify_add_watch (fs_fd, w->path,
4255 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4256 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4257 | IN_DONT_FOLLOW | IN_MASK_ADD);
2003 4258
2004 if (w->wd < 0) 4259 if (w->wd >= 0)
4260 {
4261 struct statfs sfs;
4262
4263 /* now local changes will be tracked by inotify, but remote changes won't */
4264 /* unless the filesystem is known to be local, we therefore still poll */
4265 /* also do poll on <2.6.25, but with normal frequency */
4266
4267 if (!fs_2625)
4268 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4269 else if (!statfs (w->path, &sfs)
4270 && (sfs.f_type == 0x1373 /* devfs */
4271 || sfs.f_type == 0x4006 /* fat */
4272 || sfs.f_type == 0x4d44 /* msdos */
4273 || sfs.f_type == 0xEF53 /* ext2/3 */
4274 || sfs.f_type == 0x72b6 /* jffs2 */
4275 || sfs.f_type == 0x858458f6 /* ramfs */
4276 || sfs.f_type == 0x5346544e /* ntfs */
4277 || sfs.f_type == 0x3153464a /* jfs */
4278 || sfs.f_type == 0x9123683e /* btrfs */
4279 || sfs.f_type == 0x52654973 /* reiser3 */
4280 || sfs.f_type == 0x01021994 /* tmpfs */
4281 || sfs.f_type == 0x58465342 /* xfs */))
4282 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4283 else
4284 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2005 { 4285 }
2006 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4286 else
4287 {
4288 /* can't use inotify, continue to stat */
4289 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2007 4290
2008 /* monitor some parent directory for speedup hints */ 4291 /* if path is not there, monitor some parent directory for speedup hints */
4292 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4293 /* but an efficiency issue only */
2009 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4294 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2010 { 4295 {
2011 char path [4096]; 4296 char path [4096];
2012 strcpy (path, w->path); 4297 strcpy (path, w->path);
2013 4298
… …
2016 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4301 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2017 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4302 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2018 4303
2019 char *pend = strrchr (path, '/'); 4304 char *pend = strrchr (path, '/');
2020 4305
2021 if (!pend) 4306 if (!pend || pend == path)
2022 break; /* whoops, no '/', complain to your admin */ 4307 break;
2023 4308
2024 *pend = 0; 4309 *pend = 0;
2025 w->wd = inotify_add_watch (fs_fd, path, mask); 4310 w->wd = inotify_add_watch (fs_fd, path, mask);
2026 } 4311 }
2027 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4312 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2028 } 4313 }
2029 } 4314 }
2030 else
2031 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2032 4315
2033 if (w->wd >= 0) 4316 if (w->wd >= 0)
2034 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4317 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2035}
2036 4318
2037static void noinline 4319 /* now re-arm timer, if required */
4320 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4321 ev_timer_again (EV_A_ &w->timer);
4322 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4323}
4324
4325noinline
4326static void
2038infy_del (EV_P_ ev_stat *w) 4327infy_del (EV_P_ ev_stat *w)
2039{ 4328{
2040 int slot; 4329 int slot;
2041 int wd = w->wd; 4330 int wd = w->wd;
2042 4331
2043 if (wd < 0) 4332 if (wd < 0)
2044 return; 4333 return;
2045 4334
2046 w->wd = -2; 4335 w->wd = -2;
2047 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4336 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2048 wlist_del (&fs_hash [slot].head, (WL)w); 4337 wlist_del (&fs_hash [slot].head, (WL)w);
2049 4338
2050 /* remove this watcher, if others are watching it, they will rearm */ 4339 /* remove this watcher, if others are watching it, they will rearm */
2051 inotify_rm_watch (fs_fd, wd); 4340 inotify_rm_watch (fs_fd, wd);
2052} 4341}
2053 4342
2054static void noinline 4343noinline
4344static void
2055infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4345infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2056{ 4346{
2057 if (slot < 0) 4347 if (slot < 0)
2058 /* overflow, need to check for all hahs slots */ 4348 /* overflow, need to check for all hash slots */
2059 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4349 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2060 infy_wd (EV_A_ slot, wd, ev); 4350 infy_wd (EV_A_ slot, wd, ev);
2061 else 4351 else
2062 { 4352 {
2063 WL w_; 4353 WL w_;
2064 4354
2065 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4355 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2066 { 4356 {
2067 ev_stat *w = (ev_stat *)w_; 4357 ev_stat *w = (ev_stat *)w_;
2068 w_ = w_->next; /* lets us remove this watcher and all before it */ 4358 w_ = w_->next; /* lets us remove this watcher and all before it */
2069 4359
2070 if (w->wd == wd || wd == -1) 4360 if (w->wd == wd || wd == -1)
2071 { 4361 {
2072 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4362 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2073 { 4363 {
4364 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2074 w->wd = -1; 4365 w->wd = -1;
2075 infy_add (EV_A_ w); /* re-add, no matter what */ 4366 infy_add (EV_A_ w); /* re-add, no matter what */
2076 } 4367 }
2077 4368
2078 stat_timer_cb (EV_A_ &w->timer, 0); 4369 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2083 4374
2084static void 4375static void
2085infy_cb (EV_P_ ev_io *w, int revents) 4376infy_cb (EV_P_ ev_io *w, int revents)
2086{ 4377{
2087 char buf [EV_INOTIFY_BUFSIZE]; 4378 char buf [EV_INOTIFY_BUFSIZE];
2088 struct inotify_event *ev = (struct inotify_event *)buf;
2089 int ofs; 4379 int ofs;
2090 int len = read (fs_fd, buf, sizeof (buf)); 4380 int len = read (fs_fd, buf, sizeof (buf));
2091 4381
2092 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4382 for (ofs = 0; ofs < len; )
4383 {
4384 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2093 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4385 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4386 ofs += sizeof (struct inotify_event) + ev->len;
4387 }
2094} 4388}
2095 4389
2096void inline_size 4390inline_size ecb_cold
4391void
4392ev_check_2625 (EV_P)
4393{
4394 /* kernels < 2.6.25 are borked
4395 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4396 */
4397 if (ev_linux_version () < 0x020619)
4398 return;
4399
4400 fs_2625 = 1;
4401}
4402
4403inline_size int
4404infy_newfd (void)
4405{
4406#if defined IN_CLOEXEC && defined IN_NONBLOCK
4407 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4408 if (fd >= 0)
4409 return fd;
4410#endif
4411 return inotify_init ();
4412}
4413
4414inline_size void
2097infy_init (EV_P) 4415infy_init (EV_P)
2098{ 4416{
2099 if (fs_fd != -2) 4417 if (fs_fd != -2)
2100 return; 4418 return;
2101 4419
4420 fs_fd = -1;
4421
4422 ev_check_2625 (EV_A);
4423
2102 fs_fd = inotify_init (); 4424 fs_fd = infy_newfd ();
2103 4425
2104 if (fs_fd >= 0) 4426 if (fs_fd >= 0)
2105 { 4427 {
4428 fd_intern (fs_fd);
2106 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4429 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2107 ev_set_priority (&fs_w, EV_MAXPRI); 4430 ev_set_priority (&fs_w, EV_MAXPRI);
2108 ev_io_start (EV_A_ &fs_w); 4431 ev_io_start (EV_A_ &fs_w);
4432 ev_unref (EV_A);
2109 } 4433 }
2110} 4434}
2111 4435
2112void inline_size 4436inline_size void
2113infy_fork (EV_P) 4437infy_fork (EV_P)
2114{ 4438{
2115 int slot; 4439 int slot;
2116 4440
2117 if (fs_fd < 0) 4441 if (fs_fd < 0)
2118 return; 4442 return;
2119 4443
4444 ev_ref (EV_A);
4445 ev_io_stop (EV_A_ &fs_w);
2120 close (fs_fd); 4446 close (fs_fd);
2121 fs_fd = inotify_init (); 4447 fs_fd = infy_newfd ();
2122 4448
4449 if (fs_fd >= 0)
4450 {
4451 fd_intern (fs_fd);
4452 ev_io_set (&fs_w, fs_fd, EV_READ);
4453 ev_io_start (EV_A_ &fs_w);
4454 ev_unref (EV_A);
4455 }
4456
2123 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4457 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2124 { 4458 {
2125 WL w_ = fs_hash [slot].head; 4459 WL w_ = fs_hash [slot].head;
2126 fs_hash [slot].head = 0; 4460 fs_hash [slot].head = 0;
2127 4461
2128 while (w_) 4462 while (w_)
… …
2133 w->wd = -1; 4467 w->wd = -1;
2134 4468
2135 if (fs_fd >= 0) 4469 if (fs_fd >= 0)
2136 infy_add (EV_A_ w); /* re-add, no matter what */ 4470 infy_add (EV_A_ w); /* re-add, no matter what */
2137 else 4471 else
4472 {
4473 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4474 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2138 ev_timer_start (EV_A_ &w->timer); 4475 ev_timer_again (EV_A_ &w->timer);
4476 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4477 }
2139 } 4478 }
2140
2141 } 4479 }
2142} 4480}
2143 4481
2144#endif 4482#endif
2145 4483
4484#ifdef _WIN32
4485# define EV_LSTAT(p,b) _stati64 (p, b)
4486#else
4487# define EV_LSTAT(p,b) lstat (p, b)
4488#endif
4489
2146void 4490void
2147ev_stat_stat (EV_P_ ev_stat *w) 4491ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2148{ 4492{
2149 if (lstat (w->path, &w->attr) < 0) 4493 if (lstat (w->path, &w->attr) < 0)
2150 w->attr.st_nlink = 0; 4494 w->attr.st_nlink = 0;
2151 else if (!w->attr.st_nlink) 4495 else if (!w->attr.st_nlink)
2152 w->attr.st_nlink = 1; 4496 w->attr.st_nlink = 1;
2153} 4497}
2154 4498
2155static void noinline 4499noinline
4500static void
2156stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4501stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2157{ 4502{
2158 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4503 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2159 4504
2160 /* we copy this here each the time so that */ 4505 ev_statdata prev = w->attr;
2161 /* prev has the old value when the callback gets invoked */
2162 w->prev = w->attr;
2163 ev_stat_stat (EV_A_ w); 4506 ev_stat_stat (EV_A_ w);
2164 4507
2165 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4508 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2166 if ( 4509 if (
2167 w->prev.st_dev != w->attr.st_dev 4510 prev.st_dev != w->attr.st_dev
2168 || w->prev.st_ino != w->attr.st_ino 4511 || prev.st_ino != w->attr.st_ino
2169 || w->prev.st_mode != w->attr.st_mode 4512 || prev.st_mode != w->attr.st_mode
2170 || w->prev.st_nlink != w->attr.st_nlink 4513 || prev.st_nlink != w->attr.st_nlink
2171 || w->prev.st_uid != w->attr.st_uid 4514 || prev.st_uid != w->attr.st_uid
2172 || w->prev.st_gid != w->attr.st_gid 4515 || prev.st_gid != w->attr.st_gid
2173 || w->prev.st_rdev != w->attr.st_rdev 4516 || prev.st_rdev != w->attr.st_rdev
2174 || w->prev.st_size != w->attr.st_size 4517 || prev.st_size != w->attr.st_size
2175 || w->prev.st_atime != w->attr.st_atime 4518 || prev.st_atime != w->attr.st_atime
2176 || w->prev.st_mtime != w->attr.st_mtime 4519 || prev.st_mtime != w->attr.st_mtime
2177 || w->prev.st_ctime != w->attr.st_ctime 4520 || prev.st_ctime != w->attr.st_ctime
2178 ) { 4521 ) {
4522 /* we only update w->prev on actual differences */
4523 /* in case we test more often than invoke the callback, */
4524 /* to ensure that prev is always different to attr */
4525 w->prev = prev;
4526
2179 #if EV_USE_INOTIFY 4527 #if EV_USE_INOTIFY
4528 if (fs_fd >= 0)
4529 {
2180 infy_del (EV_A_ w); 4530 infy_del (EV_A_ w);
2181 infy_add (EV_A_ w); 4531 infy_add (EV_A_ w);
2182 ev_stat_stat (EV_A_ w); /* avoid race... */ 4532 ev_stat_stat (EV_A_ w); /* avoid race... */
4533 }
2183 #endif 4534 #endif
2184 4535
2185 ev_feed_event (EV_A_ w, EV_STAT); 4536 ev_feed_event (EV_A_ w, EV_STAT);
2186 } 4537 }
2187} 4538}
2188 4539
2189void 4540void
2190ev_stat_start (EV_P_ ev_stat *w) 4541ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2191{ 4542{
2192 if (expect_false (ev_is_active (w))) 4543 if (expect_false (ev_is_active (w)))
2193 return; 4544 return;
2194 4545
2195 /* since we use memcmp, we need to clear any padding data etc. */
2196 memset (&w->prev, 0, sizeof (ev_statdata));
2197 memset (&w->attr, 0, sizeof (ev_statdata));
2198
2199 ev_stat_stat (EV_A_ w); 4546 ev_stat_stat (EV_A_ w);
2200 4547
4548 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2201 if (w->interval < MIN_STAT_INTERVAL) 4549 w->interval = MIN_STAT_INTERVAL;
2202 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2203 4550
2204 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4551 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2205 ev_set_priority (&w->timer, ev_priority (w)); 4552 ev_set_priority (&w->timer, ev_priority (w));
2206 4553
2207#if EV_USE_INOTIFY 4554#if EV_USE_INOTIFY
2208 infy_init (EV_A); 4555 infy_init (EV_A);
2209 4556
2210 if (fs_fd >= 0) 4557 if (fs_fd >= 0)
2211 infy_add (EV_A_ w); 4558 infy_add (EV_A_ w);
2212 else 4559 else
2213#endif 4560#endif
4561 {
2214 ev_timer_start (EV_A_ &w->timer); 4562 ev_timer_again (EV_A_ &w->timer);
4563 ev_unref (EV_A);
4564 }
2215 4565
2216 ev_start (EV_A_ (W)w, 1); 4566 ev_start (EV_A_ (W)w, 1);
2217}
2218 4567
4568 EV_FREQUENT_CHECK;
4569}
4570
2219void 4571void
2220ev_stat_stop (EV_P_ ev_stat *w) 4572ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2221{ 4573{
2222 clear_pending (EV_A_ (W)w); 4574 clear_pending (EV_A_ (W)w);
2223 if (expect_false (!ev_is_active (w))) 4575 if (expect_false (!ev_is_active (w)))
2224 return; 4576 return;
2225 4577
4578 EV_FREQUENT_CHECK;
4579
2226#if EV_USE_INOTIFY 4580#if EV_USE_INOTIFY
2227 infy_del (EV_A_ w); 4581 infy_del (EV_A_ w);
2228#endif 4582#endif
4583
4584 if (ev_is_active (&w->timer))
4585 {
4586 ev_ref (EV_A);
2229 ev_timer_stop (EV_A_ &w->timer); 4587 ev_timer_stop (EV_A_ &w->timer);
4588 }
2230 4589
2231 ev_stop (EV_A_ (W)w); 4590 ev_stop (EV_A_ (W)w);
4591
4592 EV_FREQUENT_CHECK;
2232} 4593}
2233#endif 4594#endif
2234 4595
2235#if EV_IDLE_ENABLE 4596#if EV_IDLE_ENABLE
2236void 4597void
2237ev_idle_start (EV_P_ ev_idle *w) 4598ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2238{ 4599{
2239 if (expect_false (ev_is_active (w))) 4600 if (expect_false (ev_is_active (w)))
2240 return; 4601 return;
2241 4602
2242 pri_adjust (EV_A_ (W)w); 4603 pri_adjust (EV_A_ (W)w);
4604
4605 EV_FREQUENT_CHECK;
2243 4606
2244 { 4607 {
2245 int active = ++idlecnt [ABSPRI (w)]; 4608 int active = ++idlecnt [ABSPRI (w)];
2246 4609
2247 ++idleall; 4610 ++idleall;
2248 ev_start (EV_A_ (W)w, active); 4611 ev_start (EV_A_ (W)w, active);
2249 4612
2250 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4613 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2251 idles [ABSPRI (w)][active - 1] = w; 4614 idles [ABSPRI (w)][active - 1] = w;
2252 } 4615 }
2253}
2254 4616
4617 EV_FREQUENT_CHECK;
4618}
4619
2255void 4620void
2256ev_idle_stop (EV_P_ ev_idle *w) 4621ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2257{ 4622{
2258 clear_pending (EV_A_ (W)w); 4623 clear_pending (EV_A_ (W)w);
2259 if (expect_false (!ev_is_active (w))) 4624 if (expect_false (!ev_is_active (w)))
2260 return; 4625 return;
2261 4626
4627 EV_FREQUENT_CHECK;
4628
2262 { 4629 {
2263 int active = ((W)w)->active; 4630 int active = ev_active (w);
2264 4631
2265 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4632 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2266 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4633 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2267 4634
2268 ev_stop (EV_A_ (W)w); 4635 ev_stop (EV_A_ (W)w);
2269 --idleall; 4636 --idleall;
2270 } 4637 }
2271}
2272#endif
2273 4638
4639 EV_FREQUENT_CHECK;
4640}
4641#endif
4642
4643#if EV_PREPARE_ENABLE
2274void 4644void
2275ev_prepare_start (EV_P_ ev_prepare *w) 4645ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2276{ 4646{
2277 if (expect_false (ev_is_active (w))) 4647 if (expect_false (ev_is_active (w)))
2278 return; 4648 return;
4649
4650 EV_FREQUENT_CHECK;
2279 4651
2280 ev_start (EV_A_ (W)w, ++preparecnt); 4652 ev_start (EV_A_ (W)w, ++preparecnt);
2281 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4653 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2282 prepares [preparecnt - 1] = w; 4654 prepares [preparecnt - 1] = w;
2283}
2284 4655
4656 EV_FREQUENT_CHECK;
4657}
4658
2285void 4659void
2286ev_prepare_stop (EV_P_ ev_prepare *w) 4660ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2287{ 4661{
2288 clear_pending (EV_A_ (W)w); 4662 clear_pending (EV_A_ (W)w);
2289 if (expect_false (!ev_is_active (w))) 4663 if (expect_false (!ev_is_active (w)))
2290 return; 4664 return;
2291 4665
4666 EV_FREQUENT_CHECK;
4667
2292 { 4668 {
2293 int active = ((W)w)->active; 4669 int active = ev_active (w);
4670
2294 prepares [active - 1] = prepares [--preparecnt]; 4671 prepares [active - 1] = prepares [--preparecnt];
2295 ((W)prepares [active - 1])->active = active; 4672 ev_active (prepares [active - 1]) = active;
2296 } 4673 }
2297 4674
2298 ev_stop (EV_A_ (W)w); 4675 ev_stop (EV_A_ (W)w);
2299}
2300 4676
4677 EV_FREQUENT_CHECK;
4678}
4679#endif
4680
4681#if EV_CHECK_ENABLE
2301void 4682void
2302ev_check_start (EV_P_ ev_check *w) 4683ev_check_start (EV_P_ ev_check *w) EV_THROW
2303{ 4684{
2304 if (expect_false (ev_is_active (w))) 4685 if (expect_false (ev_is_active (w)))
2305 return; 4686 return;
4687
4688 EV_FREQUENT_CHECK;
2306 4689
2307 ev_start (EV_A_ (W)w, ++checkcnt); 4690 ev_start (EV_A_ (W)w, ++checkcnt);
2308 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4691 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2309 checks [checkcnt - 1] = w; 4692 checks [checkcnt - 1] = w;
2310}
2311 4693
4694 EV_FREQUENT_CHECK;
4695}
4696
2312void 4697void
2313ev_check_stop (EV_P_ ev_check *w) 4698ev_check_stop (EV_P_ ev_check *w) EV_THROW
2314{ 4699{
2315 clear_pending (EV_A_ (W)w); 4700 clear_pending (EV_A_ (W)w);
2316 if (expect_false (!ev_is_active (w))) 4701 if (expect_false (!ev_is_active (w)))
2317 return; 4702 return;
2318 4703
4704 EV_FREQUENT_CHECK;
4705
2319 { 4706 {
2320 int active = ((W)w)->active; 4707 int active = ev_active (w);
4708
2321 checks [active - 1] = checks [--checkcnt]; 4709 checks [active - 1] = checks [--checkcnt];
2322 ((W)checks [active - 1])->active = active; 4710 ev_active (checks [active - 1]) = active;
2323 } 4711 }
2324 4712
2325 ev_stop (EV_A_ (W)w); 4713 ev_stop (EV_A_ (W)w);
4714
4715 EV_FREQUENT_CHECK;
2326} 4716}
4717#endif
2327 4718
2328#if EV_EMBED_ENABLE 4719#if EV_EMBED_ENABLE
2329void noinline 4720noinline
4721void
2330ev_embed_sweep (EV_P_ ev_embed *w) 4722ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2331{ 4723{
2332 ev_loop (w->other, EVLOOP_NONBLOCK); 4724 ev_run (w->other, EVRUN_NOWAIT);
2333} 4725}
2334 4726
2335static void 4727static void
2336embed_io_cb (EV_P_ ev_io *io, int revents) 4728embed_io_cb (EV_P_ ev_io *io, int revents)
2337{ 4729{
2338 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4730 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2339 4731
2340 if (ev_cb (w)) 4732 if (ev_cb (w))
2341 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4733 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2342 else 4734 else
2343 ev_loop (w->other, EVLOOP_NONBLOCK); 4735 ev_run (w->other, EVRUN_NOWAIT);
2344} 4736}
2345 4737
2346static void 4738static void
2347embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4739embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2348{ 4740{
2349 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4741 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2350 4742
2351 { 4743 {
2352 struct ev_loop *loop = w->other; 4744 EV_P = w->other;
2353 4745
2354 while (fdchangecnt) 4746 while (fdchangecnt)
2355 { 4747 {
2356 fd_reify (EV_A); 4748 fd_reify (EV_A);
2357 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4749 ev_run (EV_A_ EVRUN_NOWAIT);
2358 } 4750 }
2359 } 4751 }
4752}
4753
4754static void
4755embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4756{
4757 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4758
4759 ev_embed_stop (EV_A_ w);
4760
4761 {
4762 EV_P = w->other;
4763
4764 ev_loop_fork (EV_A);
4765 ev_run (EV_A_ EVRUN_NOWAIT);
4766 }
4767
4768 ev_embed_start (EV_A_ w);
2360} 4769}
2361 4770
2362#if 0 4771#if 0
2363static void 4772static void
2364embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4773embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2366 ev_idle_stop (EV_A_ idle); 4775 ev_idle_stop (EV_A_ idle);
2367} 4776}
2368#endif 4777#endif
2369 4778
2370void 4779void
2371ev_embed_start (EV_P_ ev_embed *w) 4780ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2372{ 4781{
2373 if (expect_false (ev_is_active (w))) 4782 if (expect_false (ev_is_active (w)))
2374 return; 4783 return;
2375 4784
2376 { 4785 {
2377 struct ev_loop *loop = w->other; 4786 EV_P = w->other;
2378 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4787 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2379 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4788 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2380 } 4789 }
4790
4791 EV_FREQUENT_CHECK;
2381 4792
2382 ev_set_priority (&w->io, ev_priority (w)); 4793 ev_set_priority (&w->io, ev_priority (w));
2383 ev_io_start (EV_A_ &w->io); 4794 ev_io_start (EV_A_ &w->io);
2384 4795
2385 ev_prepare_init (&w->prepare, embed_prepare_cb); 4796 ev_prepare_init (&w->prepare, embed_prepare_cb);
2386 ev_set_priority (&w->prepare, EV_MINPRI); 4797 ev_set_priority (&w->prepare, EV_MINPRI);
2387 ev_prepare_start (EV_A_ &w->prepare); 4798 ev_prepare_start (EV_A_ &w->prepare);
2388 4799
4800 ev_fork_init (&w->fork, embed_fork_cb);
4801 ev_fork_start (EV_A_ &w->fork);
4802
2389 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4803 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2390 4804
2391 ev_start (EV_A_ (W)w, 1); 4805 ev_start (EV_A_ (W)w, 1);
2392}
2393 4806
4807 EV_FREQUENT_CHECK;
4808}
4809
2394void 4810void
2395ev_embed_stop (EV_P_ ev_embed *w) 4811ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2396{ 4812{
2397 clear_pending (EV_A_ (W)w); 4813 clear_pending (EV_A_ (W)w);
2398 if (expect_false (!ev_is_active (w))) 4814 if (expect_false (!ev_is_active (w)))
2399 return; 4815 return;
2400 4816
4817 EV_FREQUENT_CHECK;
4818
2401 ev_io_stop (EV_A_ &w->io); 4819 ev_io_stop (EV_A_ &w->io);
2402 ev_prepare_stop (EV_A_ &w->prepare); 4820 ev_prepare_stop (EV_A_ &w->prepare);
4821 ev_fork_stop (EV_A_ &w->fork);
2403 4822
2404 ev_stop (EV_A_ (W)w); 4823 ev_stop (EV_A_ (W)w);
4824
4825 EV_FREQUENT_CHECK;
2405} 4826}
2406#endif 4827#endif
2407 4828
2408#if EV_FORK_ENABLE 4829#if EV_FORK_ENABLE
2409void 4830void
2410ev_fork_start (EV_P_ ev_fork *w) 4831ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2411{ 4832{
2412 if (expect_false (ev_is_active (w))) 4833 if (expect_false (ev_is_active (w)))
2413 return; 4834 return;
4835
4836 EV_FREQUENT_CHECK;
2414 4837
2415 ev_start (EV_A_ (W)w, ++forkcnt); 4838 ev_start (EV_A_ (W)w, ++forkcnt);
2416 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4839 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2417 forks [forkcnt - 1] = w; 4840 forks [forkcnt - 1] = w;
2418}
2419 4841
4842 EV_FREQUENT_CHECK;
4843}
4844
2420void 4845void
2421ev_fork_stop (EV_P_ ev_fork *w) 4846ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2422{ 4847{
2423 clear_pending (EV_A_ (W)w); 4848 clear_pending (EV_A_ (W)w);
2424 if (expect_false (!ev_is_active (w))) 4849 if (expect_false (!ev_is_active (w)))
2425 return; 4850 return;
2426 4851
4852 EV_FREQUENT_CHECK;
4853
2427 { 4854 {
2428 int active = ((W)w)->active; 4855 int active = ev_active (w);
4856
2429 forks [active - 1] = forks [--forkcnt]; 4857 forks [active - 1] = forks [--forkcnt];
2430 ((W)forks [active - 1])->active = active; 4858 ev_active (forks [active - 1]) = active;
2431 } 4859 }
2432 4860
2433 ev_stop (EV_A_ (W)w); 4861 ev_stop (EV_A_ (W)w);
2434}
2435#endif
2436 4862
4863 EV_FREQUENT_CHECK;
4864}
4865#endif
4866
2437#if EV_ASYNC_ENABLE 4867#if EV_CLEANUP_ENABLE
2438void 4868void
2439ev_async_start (EV_P_ ev_async *w) 4869ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
2440{ 4870{
2441 if (expect_false (ev_is_active (w))) 4871 if (expect_false (ev_is_active (w)))
2442 return; 4872 return;
2443 4873
4874 EV_FREQUENT_CHECK;
4875
4876 ev_start (EV_A_ (W)w, ++cleanupcnt);
4877 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4878 cleanups [cleanupcnt - 1] = w;
4879
4880 /* cleanup watchers should never keep a refcount on the loop */
4881 ev_unref (EV_A);
4882 EV_FREQUENT_CHECK;
4883}
4884
4885void
4886ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4887{
4888 clear_pending (EV_A_ (W)w);
4889 if (expect_false (!ev_is_active (w)))
4890 return;
4891
4892 EV_FREQUENT_CHECK;
4893 ev_ref (EV_A);
4894
4895 {
4896 int active = ev_active (w);
4897
4898 cleanups [active - 1] = cleanups [--cleanupcnt];
4899 ev_active (cleanups [active - 1]) = active;
4900 }
4901
4902 ev_stop (EV_A_ (W)w);
4903
4904 EV_FREQUENT_CHECK;
4905}
4906#endif
4907
4908#if EV_ASYNC_ENABLE
4909void
4910ev_async_start (EV_P_ ev_async *w) EV_THROW
4911{
4912 if (expect_false (ev_is_active (w)))
4913 return;
4914
4915 w->sent = 0;
4916
2444 evpipe_init (EV_A); 4917 evpipe_init (EV_A);
4918
4919 EV_FREQUENT_CHECK;
2445 4920
2446 ev_start (EV_A_ (W)w, ++asynccnt); 4921 ev_start (EV_A_ (W)w, ++asynccnt);
2447 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4922 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2448 asyncs [asynccnt - 1] = w; 4923 asyncs [asynccnt - 1] = w;
2449}
2450 4924
4925 EV_FREQUENT_CHECK;
4926}
4927
2451void 4928void
2452ev_async_stop (EV_P_ ev_async *w) 4929ev_async_stop (EV_P_ ev_async *w) EV_THROW
2453{ 4930{
2454 clear_pending (EV_A_ (W)w); 4931 clear_pending (EV_A_ (W)w);
2455 if (expect_false (!ev_is_active (w))) 4932 if (expect_false (!ev_is_active (w)))
2456 return; 4933 return;
2457 4934
4935 EV_FREQUENT_CHECK;
4936
2458 { 4937 {
2459 int active = ((W)w)->active; 4938 int active = ev_active (w);
4939
2460 asyncs [active - 1] = asyncs [--asynccnt]; 4940 asyncs [active - 1] = asyncs [--asynccnt];
2461 ((W)asyncs [active - 1])->active = active; 4941 ev_active (asyncs [active - 1]) = active;
2462 } 4942 }
2463 4943
2464 ev_stop (EV_A_ (W)w); 4944 ev_stop (EV_A_ (W)w);
2465}
2466 4945
4946 EV_FREQUENT_CHECK;
4947}
4948
2467void 4949void
2468ev_async_send (EV_P_ ev_async *w) 4950ev_async_send (EV_P_ ev_async *w) EV_THROW
2469{ 4951{
2470 w->sent = 1; 4952 w->sent = 1;
2471 evpipe_write (EV_A_ &gotasync); 4953 evpipe_write (EV_A_ &async_pending);
2472} 4954}
2473#endif 4955#endif
2474 4956
2475/*****************************************************************************/ 4957/*****************************************************************************/
2476 4958
… …
2486once_cb (EV_P_ struct ev_once *once, int revents) 4968once_cb (EV_P_ struct ev_once *once, int revents)
2487{ 4969{
2488 void (*cb)(int revents, void *arg) = once->cb; 4970 void (*cb)(int revents, void *arg) = once->cb;
2489 void *arg = once->arg; 4971 void *arg = once->arg;
2490 4972
2491 ev_io_stop (EV_A_ &once->io); 4973 ev_io_stop (EV_A_ &once->io);
2492 ev_timer_stop (EV_A_ &once->to); 4974 ev_timer_stop (EV_A_ &once->to);
2493 ev_free (once); 4975 ev_free (once);
2494 4976
2495 cb (revents, arg); 4977 cb (revents, arg);
2496} 4978}
2497 4979
2498static void 4980static void
2499once_cb_io (EV_P_ ev_io *w, int revents) 4981once_cb_io (EV_P_ ev_io *w, int revents)
2500{ 4982{
2501 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4983 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4984
4985 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2502} 4986}
2503 4987
2504static void 4988static void
2505once_cb_to (EV_P_ ev_timer *w, int revents) 4989once_cb_to (EV_P_ ev_timer *w, int revents)
2506{ 4990{
2507 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4991 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
2508}
2509 4992
4993 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4994}
4995
2510void 4996void
2511ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4997ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2512{ 4998{
2513 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4999 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2514 5000
2515 if (expect_false (!once)) 5001 if (expect_false (!once))
2516 { 5002 {
2517 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 5003 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2518 return; 5004 return;
2519 } 5005 }
2520 5006
2521 once->cb = cb; 5007 once->cb = cb;
2522 once->arg = arg; 5008 once->arg = arg;
… …
2534 ev_timer_set (&once->to, timeout, 0.); 5020 ev_timer_set (&once->to, timeout, 0.);
2535 ev_timer_start (EV_A_ &once->to); 5021 ev_timer_start (EV_A_ &once->to);
2536 } 5022 }
2537} 5023}
2538 5024
5025/*****************************************************************************/
5026
5027#if EV_WALK_ENABLE
5028ecb_cold
5029void
5030ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
5031{
5032 int i, j;
5033 ev_watcher_list *wl, *wn;
5034
5035 if (types & (EV_IO | EV_EMBED))
5036 for (i = 0; i < anfdmax; ++i)
5037 for (wl = anfds [i].head; wl; )
5038 {
5039 wn = wl->next;
5040
5041#if EV_EMBED_ENABLE
5042 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5043 {
5044 if (types & EV_EMBED)
5045 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5046 }
5047 else
5048#endif
5049#if EV_USE_INOTIFY
5050 if (ev_cb ((ev_io *)wl) == infy_cb)
5051 ;
5052 else
5053#endif
5054 if ((ev_io *)wl != &pipe_w)
5055 if (types & EV_IO)
5056 cb (EV_A_ EV_IO, wl);
5057
5058 wl = wn;
5059 }
5060
5061 if (types & (EV_TIMER | EV_STAT))
5062 for (i = timercnt + HEAP0; i-- > HEAP0; )
5063#if EV_STAT_ENABLE
5064 /*TODO: timer is not always active*/
5065 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5066 {
5067 if (types & EV_STAT)
5068 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5069 }
5070 else
5071#endif
5072 if (types & EV_TIMER)
5073 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5074
5075#if EV_PERIODIC_ENABLE
5076 if (types & EV_PERIODIC)
5077 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5078 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5079#endif
5080
5081#if EV_IDLE_ENABLE
5082 if (types & EV_IDLE)
5083 for (j = NUMPRI; j--; )
5084 for (i = idlecnt [j]; i--; )
5085 cb (EV_A_ EV_IDLE, idles [j][i]);
5086#endif
5087
5088#if EV_FORK_ENABLE
5089 if (types & EV_FORK)
5090 for (i = forkcnt; i--; )
5091 if (ev_cb (forks [i]) != embed_fork_cb)
5092 cb (EV_A_ EV_FORK, forks [i]);
5093#endif
5094
5095#if EV_ASYNC_ENABLE
5096 if (types & EV_ASYNC)
5097 for (i = asynccnt; i--; )
5098 cb (EV_A_ EV_ASYNC, asyncs [i]);
5099#endif
5100
5101#if EV_PREPARE_ENABLE
5102 if (types & EV_PREPARE)
5103 for (i = preparecnt; i--; )
5104# if EV_EMBED_ENABLE
5105 if (ev_cb (prepares [i]) != embed_prepare_cb)
5106# endif
5107 cb (EV_A_ EV_PREPARE, prepares [i]);
5108#endif
5109
5110#if EV_CHECK_ENABLE
5111 if (types & EV_CHECK)
5112 for (i = checkcnt; i--; )
5113 cb (EV_A_ EV_CHECK, checks [i]);
5114#endif
5115
5116#if EV_SIGNAL_ENABLE
5117 if (types & EV_SIGNAL)
5118 for (i = 0; i < EV_NSIG - 1; ++i)
5119 for (wl = signals [i].head; wl; )
5120 {
5121 wn = wl->next;
5122 cb (EV_A_ EV_SIGNAL, wl);
5123 wl = wn;
5124 }
5125#endif
5126
5127#if EV_CHILD_ENABLE
5128 if (types & EV_CHILD)
5129 for (i = (EV_PID_HASHSIZE); i--; )
5130 for (wl = childs [i]; wl; )
5131 {
5132 wn = wl->next;
5133 cb (EV_A_ EV_CHILD, wl);
5134 wl = wn;
5135 }
5136#endif
5137/* EV_STAT 0x00001000 /* stat data changed */
5138/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5139}
5140#endif
5141
2539#if EV_MULTIPLICITY 5142#if EV_MULTIPLICITY
2540 #include "ev_wrap.h" 5143 #include "ev_wrap.h"
2541#endif 5144#endif
2542 5145
2543#ifdef __cplusplus
2544}
2545#endif
2546

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