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Comparing libev/ev.c (file contents):
Revision 1.221 by root, Sun Apr 6 12:44:49 2008 UTC vs.
Revision 1.444 by root, Fri Jun 1 22:01:13 2012 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 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
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
51 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
52# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
55# endif 71# endif
56# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
58# endif 74# endif
59# else 75# else
60# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
62# endif 78# endif
63# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
65# endif 81# endif
66# endif 82# endif
67 83
84# if HAVE_NANOSLEEP
68# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
71# else 88# else
89# undef EV_USE_NANOSLEEP
72# 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
73# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
74# endif 100# endif
75 101
102# if HAVE_POLL && HAVE_POLL_H
76# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
77# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif 105# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else 106# else
107# undef EV_USE_POLL
88# define EV_USE_POLL 0 108# define EV_USE_POLL 0
89# endif
90# endif 109# endif
91 110
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
95# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
96# define EV_USE_EPOLL 0
97# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
98# endif 118# endif
99 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
106# endif 127# endif
107 128
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
111# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
112# define EV_USE_PORT 0
113# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
114# endif 136# endif
115 137
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
119# else
120# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
121# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
122# endif 145# endif
123 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
124# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
125# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
130# endif 154# endif
131 155
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
132#endif 163# endif
164
165#endif
133 166
134#include <math.h>
135#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
136#include <fcntl.h> 169#include <fcntl.h>
137#include <stddef.h> 170#include <stddef.h>
138 171
139#include <stdio.h> 172#include <stdio.h>
140 173
141#include <assert.h> 174#include <assert.h>
142#include <errno.h> 175#include <errno.h>
143#include <sys/types.h> 176#include <sys/types.h>
144#include <time.h> 177#include <time.h>
178#include <limits.h>
145 179
146#include <signal.h> 180#include <signal.h>
147 181
148#ifdef EV_H 182#ifdef EV_H
149# include EV_H 183# include EV_H
150#else 184#else
151# 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
152#endif 197#endif
153 198
154#ifndef _WIN32 199#ifndef _WIN32
155# include <sys/time.h> 200# include <sys/time.h>
156# include <sys/wait.h> 201# include <sys/wait.h>
157# include <unistd.h> 202# include <unistd.h>
158#else 203#else
204# include <io.h>
159# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
160# include <windows.h> 207# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
163# endif 210# endif
211# undef EV_AVOID_STDIO
164#endif 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
165 221
166/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
167 223
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# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
261# endif
262#endif
263
168#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
169# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
269# endif
170#endif 270#endif
171 271
172#ifndef EV_USE_REALTIME 272#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 274#endif
175 275
176#ifndef EV_USE_NANOSLEEP 276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
177# define EV_USE_NANOSLEEP 0 280# define EV_USE_NANOSLEEP 0
281# endif
178#endif 282#endif
179 283
180#ifndef EV_USE_SELECT 284#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 286#endif
183 287
184#ifndef EV_USE_POLL 288#ifndef EV_USE_POLL
185# ifdef _WIN32 289# ifdef _WIN32
186# define EV_USE_POLL 0 290# define EV_USE_POLL 0
187# else 291# else
188# define EV_USE_POLL 1 292# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 293# endif
190#endif 294#endif
191 295
192#ifndef EV_USE_EPOLL 296#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 299# else
196# define EV_USE_EPOLL 0 300# define EV_USE_EPOLL 0
197# endif 301# endif
198#endif 302#endif
199 303
… …
205# define EV_USE_PORT 0 309# define EV_USE_PORT 0
206#endif 310#endif
207 311
208#ifndef EV_USE_INOTIFY 312#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 314# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 315# else
212# define EV_USE_INOTIFY 0 316# define EV_USE_INOTIFY 0
213# endif 317# endif
214#endif 318#endif
215 319
216#ifndef EV_PID_HASHSIZE 320#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif 322#endif
223 323
224#ifndef EV_INOTIFY_HASHSIZE 324#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif 326#endif
231 327
232#ifndef EV_USE_EVENTFD 328#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 330# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 331# else
236# define EV_USE_EVENTFD 0 332# define EV_USE_EVENTFD 0
237# endif 333# endif
238#endif 334#endif
239 335
336#ifndef EV_USE_SIGNALFD
337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
338# define EV_USE_SIGNALFD EV_FEATURE_OS
339# else
340# define EV_USE_SIGNALFD 0
341# endif
342#endif
343
344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
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
241 383
242#ifndef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC 385# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0 386# define EV_USE_MONOTONIC 0
245#endif 387#endif
… …
253# undef EV_USE_INOTIFY 395# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0 396# define EV_USE_INOTIFY 0
255#endif 397#endif
256 398
257#if !EV_USE_NANOSLEEP 399#if !EV_USE_NANOSLEEP
258# ifndef _WIN32 400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
259# include <sys/select.h> 402# include <sys/select.h>
260# endif 403# endif
261#endif 404#endif
262 405
263#if EV_USE_INOTIFY 406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
264# include <sys/inotify.h> 408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
265#endif 413# endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif 414#endif
270 415
271#if EV_USE_EVENTFD 416#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h> 418# include <stdint.h>
419# ifndef EFD_NONBLOCK
420# define EFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef EFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define EFD_CLOEXEC O_CLOEXEC
425# else
426# define EFD_CLOEXEC 02000000
427# endif
428# endif
274int eventfd (unsigned int initval, int flags); 429EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
430#endif
431
432#if EV_USE_SIGNALFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef SFD_NONBLOCK
436# define SFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef SFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define SFD_CLOEXEC O_CLOEXEC
441# else
442# define SFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
446
447struct signalfd_siginfo
448{
449 uint32_t ssi_signo;
450 char pad[128 - sizeof (uint32_t)];
451};
275#endif 452#endif
276 453
277/**/ 454/**/
278 455
456#if EV_VERIFY >= 3
457# define EV_FREQUENT_CHECK ev_verify (EV_A)
458#else
459# define EV_FREQUENT_CHECK do { } while (0)
460#endif
461
279/* 462/*
280 * This is used to avoid floating point rounding problems. 463 * This is used to work around floating point rounding problems.
281 * It is added to ev_rt_now when scheduling periodics
282 * to ensure progress, time-wise, even when rounding
283 * errors are against us.
284 * This value is good at least till the year 4000. 464 * This value is good at least till the year 4000.
285 * Better solutions welcome.
286 */ 465 */
287#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
288 468
289#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
290#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
291/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
292 471
472#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
473#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
493 *
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
504 */
505
506#ifndef ECB_H
507#define ECB_H
508
509/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010001
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
293#if __GNUC__ >= 4 519 #if __GNUC__
294# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
295# define noinline __attribute__ ((noinline)) 521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
526 #ifdef _WIN64
527 #define ECB_PTRSIZE 8
528 typedef uint64_t uintptr_t;
529 typedef int64_t intptr_t;
530 #else
531 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t;
534 #endif
535 typedef intptr_t ptrdiff_t;
296#else 536#else
297# define expect(expr,value) (expr) 537 #include <inttypes.h>
298# define noinline 538 #if UINTMAX_MAX > 0xffffffffU
299# if __STDC_VERSION__ < 199901L 539 #define ECB_PTRSIZE 8
300# define inline 540 #else
541 #define ECB_PTRSIZE 4
542 #endif
301# endif 543#endif
544
545/* many compilers define _GNUC_ to some versions but then only implement
546 * what their idiot authors think are the "more important" extensions,
547 * causing enormous grief in return for some better fake benchmark numbers.
548 * or so.
549 * we try to detect these and simply assume they are not gcc - if they have
550 * an issue with that they should have done it right in the first place.
551 */
552#ifndef ECB_GCC_VERSION
553 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
554 #define ECB_GCC_VERSION(major,minor) 0
555 #else
556 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
302#endif 557 #endif
558#endif
303 559
560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
561#define ECB_C99 (__STDC_VERSION__ >= 199901L)
562#define ECB_C11 (__STDC_VERSION__ >= 201112L)
563#define ECB_CPP (__cplusplus+0)
564#define ECB_CPP11 (__cplusplus >= 201103L)
565
566/*****************************************************************************/
567
568/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
569/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
570
571#if ECB_NO_THREADS
572 #define ECB_NO_SMP 1
573#endif
574
575#if ECB_NO_SMP
576 #define ECB_MEMORY_FENCE do { } while (0)
577#endif
578
579#ifndef ECB_MEMORY_FENCE
580 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
581 #if __i386 || __i386__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
583 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
584 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
585 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
586 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
587 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
588 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
589 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
590 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
591 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
592 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
593 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
594 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
595 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
596 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
597 #elif __sparc || __sparc__
598 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
599 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
601 #elif defined __s390__ || defined __s390x__
602 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
603 #elif defined __mips__
604 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
605 #elif defined __alpha__
606 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
607 #elif defined __hppa__
608 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
610 #elif defined __ia64__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
612 #endif
613 #endif
614#endif
615
616#ifndef ECB_MEMORY_FENCE
617 #if ECB_GCC_VERSION(4,7)
618 /* see comment below (stdatomic.h) about the C11 memory model. */
619 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
620 #elif defined __clang && __has_feature (cxx_atomic)
621 /* see comment below (stdatomic.h) about the C11 memory model. */
622 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
623 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
624 #define ECB_MEMORY_FENCE __sync_synchronize ()
625 #elif _MSC_VER >= 1400 /* VC++ 2005 */
626 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
627 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
628 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
629 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
630 #elif defined _WIN32
631 #include <WinNT.h>
632 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
633 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
634 #include <mbarrier.h>
635 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
636 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
637 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
638 #elif __xlC__
639 #define ECB_MEMORY_FENCE __sync ()
640 #endif
641#endif
642
643#ifndef ECB_MEMORY_FENCE
644 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
645 /* we assume that these memory fences work on all variables/all memory accesses, */
646 /* not just C11 atomics and atomic accesses */
647 #include <stdatomic.h>
648 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
649 /* any fence other than seq_cst, which isn't very efficient for us. */
650 /* Why that is, we don't know - either the C11 memory model is quite useless */
651 /* for most usages, or gcc and clang have a bug */
652 /* I *currently* lean towards the latter, and inefficiently implement */
653 /* all three of ecb's fences as a seq_cst fence */
654 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
655 #endif
656#endif
657
658#ifndef ECB_MEMORY_FENCE
659 #if !ECB_AVOID_PTHREADS
660 /*
661 * if you get undefined symbol references to pthread_mutex_lock,
662 * or failure to find pthread.h, then you should implement
663 * the ECB_MEMORY_FENCE operations for your cpu/compiler
664 * OR provide pthread.h and link against the posix thread library
665 * of your system.
666 */
667 #include <pthread.h>
668 #define ECB_NEEDS_PTHREADS 1
669 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
670
671 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
672 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
673 #endif
674#endif
675
676#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
677 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
678#endif
679
680#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
681 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
682#endif
683
684/*****************************************************************************/
685
686#if __cplusplus
687 #define ecb_inline static inline
688#elif ECB_GCC_VERSION(2,5)
689 #define ecb_inline static __inline__
690#elif ECB_C99
691 #define ecb_inline static inline
692#else
693 #define ecb_inline static
694#endif
695
696#if ECB_GCC_VERSION(3,3)
697 #define ecb_restrict __restrict__
698#elif ECB_C99
699 #define ecb_restrict restrict
700#else
701 #define ecb_restrict
702#endif
703
704typedef int ecb_bool;
705
706#define ECB_CONCAT_(a, b) a ## b
707#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
708#define ECB_STRINGIFY_(a) # a
709#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
710
711#define ecb_function_ ecb_inline
712
713#if ECB_GCC_VERSION(3,1)
714 #define ecb_attribute(attrlist) __attribute__(attrlist)
715 #define ecb_is_constant(expr) __builtin_constant_p (expr)
716 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
717 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
718#else
719 #define ecb_attribute(attrlist)
720 #define ecb_is_constant(expr) 0
721 #define ecb_expect(expr,value) (expr)
722 #define ecb_prefetch(addr,rw,locality)
723#endif
724
725/* no emulation for ecb_decltype */
726#if ECB_GCC_VERSION(4,5)
727 #define ecb_decltype(x) __decltype(x)
728#elif ECB_GCC_VERSION(3,0)
729 #define ecb_decltype(x) __typeof(x)
730#endif
731
732#define ecb_noinline ecb_attribute ((__noinline__))
733#define ecb_unused ecb_attribute ((__unused__))
734#define ecb_const ecb_attribute ((__const__))
735#define ecb_pure ecb_attribute ((__pure__))
736
737#if ECB_C11
738 #define ecb_noreturn _Noreturn
739#else
740 #define ecb_noreturn ecb_attribute ((__noreturn__))
741#endif
742
743#if ECB_GCC_VERSION(4,3)
744 #define ecb_artificial ecb_attribute ((__artificial__))
745 #define ecb_hot ecb_attribute ((__hot__))
746 #define ecb_cold ecb_attribute ((__cold__))
747#else
748 #define ecb_artificial
749 #define ecb_hot
750 #define ecb_cold
751#endif
752
753/* put around conditional expressions if you are very sure that the */
754/* expression is mostly true or mostly false. note that these return */
755/* booleans, not the expression. */
304#define expect_false(expr) expect ((expr) != 0, 0) 756#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
305#define expect_true(expr) expect ((expr) != 0, 1) 757#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
758/* for compatibility to the rest of the world */
759#define ecb_likely(expr) ecb_expect_true (expr)
760#define ecb_unlikely(expr) ecb_expect_false (expr)
761
762/* count trailing zero bits and count # of one bits */
763#if ECB_GCC_VERSION(3,4)
764 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
765 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
766 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
767 #define ecb_ctz32(x) __builtin_ctz (x)
768 #define ecb_ctz64(x) __builtin_ctzll (x)
769 #define ecb_popcount32(x) __builtin_popcount (x)
770 /* no popcountll */
771#else
772 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
773 ecb_function_ int
774 ecb_ctz32 (uint32_t x)
775 {
776 int r = 0;
777
778 x &= ~x + 1; /* this isolates the lowest bit */
779
780#if ECB_branchless_on_i386
781 r += !!(x & 0xaaaaaaaa) << 0;
782 r += !!(x & 0xcccccccc) << 1;
783 r += !!(x & 0xf0f0f0f0) << 2;
784 r += !!(x & 0xff00ff00) << 3;
785 r += !!(x & 0xffff0000) << 4;
786#else
787 if (x & 0xaaaaaaaa) r += 1;
788 if (x & 0xcccccccc) r += 2;
789 if (x & 0xf0f0f0f0) r += 4;
790 if (x & 0xff00ff00) r += 8;
791 if (x & 0xffff0000) r += 16;
792#endif
793
794 return r;
795 }
796
797 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
798 ecb_function_ int
799 ecb_ctz64 (uint64_t x)
800 {
801 int shift = x & 0xffffffffU ? 0 : 32;
802 return ecb_ctz32 (x >> shift) + shift;
803 }
804
805 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
806 ecb_function_ int
807 ecb_popcount32 (uint32_t x)
808 {
809 x -= (x >> 1) & 0x55555555;
810 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
811 x = ((x >> 4) + x) & 0x0f0f0f0f;
812 x *= 0x01010101;
813
814 return x >> 24;
815 }
816
817 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
818 ecb_function_ int ecb_ld32 (uint32_t x)
819 {
820 int r = 0;
821
822 if (x >> 16) { x >>= 16; r += 16; }
823 if (x >> 8) { x >>= 8; r += 8; }
824 if (x >> 4) { x >>= 4; r += 4; }
825 if (x >> 2) { x >>= 2; r += 2; }
826 if (x >> 1) { r += 1; }
827
828 return r;
829 }
830
831 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
832 ecb_function_ int ecb_ld64 (uint64_t x)
833 {
834 int r = 0;
835
836 if (x >> 32) { x >>= 32; r += 32; }
837
838 return r + ecb_ld32 (x);
839 }
840#endif
841
842ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
843ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
844ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
845ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
846
847ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
848ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
849{
850 return ( (x * 0x0802U & 0x22110U)
851 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
852}
853
854ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
855ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
856{
857 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
858 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
859 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
860 x = ( x >> 8 ) | ( x << 8);
861
862 return x;
863}
864
865ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
866ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
867{
868 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
869 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
870 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
871 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
872 x = ( x >> 16 ) | ( x << 16);
873
874 return x;
875}
876
877/* popcount64 is only available on 64 bit cpus as gcc builtin */
878/* so for this version we are lazy */
879ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
880ecb_function_ int
881ecb_popcount64 (uint64_t x)
882{
883 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
884}
885
886ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
887ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
888ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
889ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
890ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
891ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
892ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
893ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
894
895ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
896ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
897ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
898ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
899ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
900ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
901ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
902ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
903
904#if ECB_GCC_VERSION(4,3)
905 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
906 #define ecb_bswap32(x) __builtin_bswap32 (x)
907 #define ecb_bswap64(x) __builtin_bswap64 (x)
908#else
909 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
910 ecb_function_ uint16_t
911 ecb_bswap16 (uint16_t x)
912 {
913 return ecb_rotl16 (x, 8);
914 }
915
916 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
917 ecb_function_ uint32_t
918 ecb_bswap32 (uint32_t x)
919 {
920 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
921 }
922
923 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
924 ecb_function_ uint64_t
925 ecb_bswap64 (uint64_t x)
926 {
927 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
928 }
929#endif
930
931#if ECB_GCC_VERSION(4,5)
932 #define ecb_unreachable() __builtin_unreachable ()
933#else
934 /* this seems to work fine, but gcc always emits a warning for it :/ */
935 ecb_inline void ecb_unreachable (void) ecb_noreturn;
936 ecb_inline void ecb_unreachable (void) { }
937#endif
938
939/* try to tell the compiler that some condition is definitely true */
940#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
941
942ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
943ecb_inline unsigned char
944ecb_byteorder_helper (void)
945{
946 const uint32_t u = 0x11223344;
947 return *(unsigned char *)&u;
948}
949
950ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
951ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
952ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
953ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
954
955#if ECB_GCC_VERSION(3,0) || ECB_C99
956 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
957#else
958 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
959#endif
960
961#if __cplusplus
962 template<typename T>
963 static inline T ecb_div_rd (T val, T div)
964 {
965 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
966 }
967 template<typename T>
968 static inline T ecb_div_ru (T val, T div)
969 {
970 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
971 }
972#else
973 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
974 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
975#endif
976
977#if ecb_cplusplus_does_not_suck
978 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
979 template<typename T, int N>
980 static inline int ecb_array_length (const T (&arr)[N])
981 {
982 return N;
983 }
984#else
985 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
986#endif
987
988#endif
989
990/* ECB.H END */
991
992#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
993/* if your architecture doesn't need memory fences, e.g. because it is
994 * single-cpu/core, or if you use libev in a project that doesn't use libev
995 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
996 * libev, in which cases the memory fences become nops.
997 * alternatively, you can remove this #error and link against libpthread,
998 * which will then provide the memory fences.
999 */
1000# error "memory fences not defined for your architecture, please report"
1001#endif
1002
1003#ifndef ECB_MEMORY_FENCE
1004# define ECB_MEMORY_FENCE do { } while (0)
1005# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1006# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1007#endif
1008
1009#define expect_false(cond) ecb_expect_false (cond)
1010#define expect_true(cond) ecb_expect_true (cond)
1011#define noinline ecb_noinline
1012
306#define inline_size static inline 1013#define inline_size ecb_inline
307 1014
308#if EV_MINIMAL 1015#if EV_FEATURE_CODE
1016# define inline_speed ecb_inline
1017#else
309# define inline_speed static noinline 1018# define inline_speed static noinline
1019#endif
1020
1021#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1022
1023#if EV_MINPRI == EV_MAXPRI
1024# define ABSPRI(w) (((W)w), 0)
310#else 1025#else
311# define inline_speed static inline
312#endif
313
314#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
315#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1026# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1027#endif
316 1028
317#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1029#define EMPTY /* required for microsofts broken pseudo-c compiler */
318#define EMPTY2(a,b) /* used to suppress some warnings */ 1030#define EMPTY2(a,b) /* used to suppress some warnings */
319 1031
320typedef ev_watcher *W; 1032typedef ev_watcher *W;
321typedef ev_watcher_list *WL; 1033typedef ev_watcher_list *WL;
322typedef ev_watcher_time *WT; 1034typedef ev_watcher_time *WT;
323 1035
1036#define ev_active(w) ((W)(w))->active
1037#define ev_at(w) ((WT)(w))->at
1038
1039#if EV_USE_REALTIME
1040/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1041/* giving it a reasonably high chance of working on typical architectures */
1042static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1043#endif
1044
324#if EV_USE_MONOTONIC 1045#if EV_USE_MONOTONIC
325/* sig_atomic_t is used to avoid per-thread variables or locking but still */
326/* giving it a reasonably high chance of working on typical architetcures */
327static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1046static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1047#endif
1048
1049#ifndef EV_FD_TO_WIN32_HANDLE
1050# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1051#endif
1052#ifndef EV_WIN32_HANDLE_TO_FD
1053# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1054#endif
1055#ifndef EV_WIN32_CLOSE_FD
1056# define EV_WIN32_CLOSE_FD(fd) close (fd)
328#endif 1057#endif
329 1058
330#ifdef _WIN32 1059#ifdef _WIN32
331# include "ev_win32.c" 1060# include "ev_win32.c"
332#endif 1061#endif
333 1062
334/*****************************************************************************/ 1063/*****************************************************************************/
335 1064
1065/* define a suitable floor function (only used by periodics atm) */
1066
1067#if EV_USE_FLOOR
1068# include <math.h>
1069# define ev_floor(v) floor (v)
1070#else
1071
1072#include <float.h>
1073
1074/* a floor() replacement function, should be independent of ev_tstamp type */
1075static ev_tstamp noinline
1076ev_floor (ev_tstamp v)
1077{
1078 /* the choice of shift factor is not terribly important */
1079#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1080 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1081#else
1082 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1083#endif
1084
1085 /* argument too large for an unsigned long? */
1086 if (expect_false (v >= shift))
1087 {
1088 ev_tstamp f;
1089
1090 if (v == v - 1.)
1091 return v; /* very large number */
1092
1093 f = shift * ev_floor (v * (1. / shift));
1094 return f + ev_floor (v - f);
1095 }
1096
1097 /* special treatment for negative args? */
1098 if (expect_false (v < 0.))
1099 {
1100 ev_tstamp f = -ev_floor (-v);
1101
1102 return f - (f == v ? 0 : 1);
1103 }
1104
1105 /* fits into an unsigned long */
1106 return (unsigned long)v;
1107}
1108
1109#endif
1110
1111/*****************************************************************************/
1112
1113#ifdef __linux
1114# include <sys/utsname.h>
1115#endif
1116
1117static unsigned int noinline ecb_cold
1118ev_linux_version (void)
1119{
1120#ifdef __linux
1121 unsigned int v = 0;
1122 struct utsname buf;
1123 int i;
1124 char *p = buf.release;
1125
1126 if (uname (&buf))
1127 return 0;
1128
1129 for (i = 3+1; --i; )
1130 {
1131 unsigned int c = 0;
1132
1133 for (;;)
1134 {
1135 if (*p >= '0' && *p <= '9')
1136 c = c * 10 + *p++ - '0';
1137 else
1138 {
1139 p += *p == '.';
1140 break;
1141 }
1142 }
1143
1144 v = (v << 8) | c;
1145 }
1146
1147 return v;
1148#else
1149 return 0;
1150#endif
1151}
1152
1153/*****************************************************************************/
1154
1155#if EV_AVOID_STDIO
1156static void noinline ecb_cold
1157ev_printerr (const char *msg)
1158{
1159 write (STDERR_FILENO, msg, strlen (msg));
1160}
1161#endif
1162
336static void (*syserr_cb)(const char *msg); 1163static void (*syserr_cb)(const char *msg) EV_THROW;
337 1164
338void 1165void ecb_cold
339ev_set_syserr_cb (void (*cb)(const char *msg)) 1166ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
340{ 1167{
341 syserr_cb = cb; 1168 syserr_cb = cb;
342} 1169}
343 1170
344static void noinline 1171static void noinline ecb_cold
345syserr (const char *msg) 1172ev_syserr (const char *msg)
346{ 1173{
347 if (!msg) 1174 if (!msg)
348 msg = "(libev) system error"; 1175 msg = "(libev) system error";
349 1176
350 if (syserr_cb) 1177 if (syserr_cb)
351 syserr_cb (msg); 1178 syserr_cb (msg);
352 else 1179 else
353 { 1180 {
1181#if EV_AVOID_STDIO
1182 ev_printerr (msg);
1183 ev_printerr (": ");
1184 ev_printerr (strerror (errno));
1185 ev_printerr ("\n");
1186#else
354 perror (msg); 1187 perror (msg);
1188#endif
355 abort (); 1189 abort ();
356 } 1190 }
357} 1191}
358 1192
1193static void *
1194ev_realloc_emul (void *ptr, long size) EV_THROW
1195{
1196#if __GLIBC__
1197 return realloc (ptr, size);
1198#else
1199 /* some systems, notably openbsd and darwin, fail to properly
1200 * implement realloc (x, 0) (as required by both ansi c-89 and
1201 * the single unix specification, so work around them here.
1202 */
1203
1204 if (size)
1205 return realloc (ptr, size);
1206
1207 free (ptr);
1208 return 0;
1209#endif
1210}
1211
359static void *(*alloc)(void *ptr, long size); 1212static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
360 1213
361void 1214void ecb_cold
362ev_set_allocator (void *(*cb)(void *ptr, long size)) 1215ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
363{ 1216{
364 alloc = cb; 1217 alloc = cb;
365} 1218}
366 1219
367inline_speed void * 1220inline_speed void *
368ev_realloc (void *ptr, long size) 1221ev_realloc (void *ptr, long size)
369{ 1222{
370 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1223 ptr = alloc (ptr, size);
371 1224
372 if (!ptr && size) 1225 if (!ptr && size)
373 { 1226 {
1227#if EV_AVOID_STDIO
1228 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1229#else
374 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1230 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1231#endif
375 abort (); 1232 abort ();
376 } 1233 }
377 1234
378 return ptr; 1235 return ptr;
379} 1236}
… …
381#define ev_malloc(size) ev_realloc (0, (size)) 1238#define ev_malloc(size) ev_realloc (0, (size))
382#define ev_free(ptr) ev_realloc ((ptr), 0) 1239#define ev_free(ptr) ev_realloc ((ptr), 0)
383 1240
384/*****************************************************************************/ 1241/*****************************************************************************/
385 1242
1243/* set in reify when reification needed */
1244#define EV_ANFD_REIFY 1
1245
1246/* file descriptor info structure */
386typedef struct 1247typedef struct
387{ 1248{
388 WL head; 1249 WL head;
389 unsigned char events; 1250 unsigned char events; /* the events watched for */
1251 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1252 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
390 unsigned char reify; 1253 unsigned char unused;
1254#if EV_USE_EPOLL
1255 unsigned int egen; /* generation counter to counter epoll bugs */
1256#endif
391#if EV_SELECT_IS_WINSOCKET 1257#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
392 SOCKET handle; 1258 SOCKET handle;
393#endif 1259#endif
1260#if EV_USE_IOCP
1261 OVERLAPPED or, ow;
1262#endif
394} ANFD; 1263} ANFD;
395 1264
1265/* stores the pending event set for a given watcher */
396typedef struct 1266typedef struct
397{ 1267{
398 W w; 1268 W w;
399 int events; 1269 int events; /* the pending event set for the given watcher */
400} ANPENDING; 1270} ANPENDING;
401 1271
402#if EV_USE_INOTIFY 1272#if EV_USE_INOTIFY
1273/* hash table entry per inotify-id */
403typedef struct 1274typedef struct
404{ 1275{
405 WL head; 1276 WL head;
406} ANFS; 1277} ANFS;
1278#endif
1279
1280/* Heap Entry */
1281#if EV_HEAP_CACHE_AT
1282 /* a heap element */
1283 typedef struct {
1284 ev_tstamp at;
1285 WT w;
1286 } ANHE;
1287
1288 #define ANHE_w(he) (he).w /* access watcher, read-write */
1289 #define ANHE_at(he) (he).at /* access cached at, read-only */
1290 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1291#else
1292 /* a heap element */
1293 typedef WT ANHE;
1294
1295 #define ANHE_w(he) (he)
1296 #define ANHE_at(he) (he)->at
1297 #define ANHE_at_cache(he)
407#endif 1298#endif
408 1299
409#if EV_MULTIPLICITY 1300#if EV_MULTIPLICITY
410 1301
411 struct ev_loop 1302 struct ev_loop
… …
417 #undef VAR 1308 #undef VAR
418 }; 1309 };
419 #include "ev_wrap.h" 1310 #include "ev_wrap.h"
420 1311
421 static struct ev_loop default_loop_struct; 1312 static struct ev_loop default_loop_struct;
422 struct ev_loop *ev_default_loop_ptr; 1313 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
423 1314
424#else 1315#else
425 1316
426 ev_tstamp ev_rt_now; 1317 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
427 #define VAR(name,decl) static decl; 1318 #define VAR(name,decl) static decl;
428 #include "ev_vars.h" 1319 #include "ev_vars.h"
429 #undef VAR 1320 #undef VAR
430 1321
431 static int ev_default_loop_ptr; 1322 static int ev_default_loop_ptr;
432 1323
433#endif 1324#endif
434 1325
1326#if EV_FEATURE_API
1327# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1328# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1329# define EV_INVOKE_PENDING invoke_cb (EV_A)
1330#else
1331# define EV_RELEASE_CB (void)0
1332# define EV_ACQUIRE_CB (void)0
1333# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1334#endif
1335
1336#define EVBREAK_RECURSE 0x80
1337
435/*****************************************************************************/ 1338/*****************************************************************************/
436 1339
1340#ifndef EV_HAVE_EV_TIME
437ev_tstamp 1341ev_tstamp
438ev_time (void) 1342ev_time (void) EV_THROW
439{ 1343{
440#if EV_USE_REALTIME 1344#if EV_USE_REALTIME
1345 if (expect_true (have_realtime))
1346 {
441 struct timespec ts; 1347 struct timespec ts;
442 clock_gettime (CLOCK_REALTIME, &ts); 1348 clock_gettime (CLOCK_REALTIME, &ts);
443 return ts.tv_sec + ts.tv_nsec * 1e-9; 1349 return ts.tv_sec + ts.tv_nsec * 1e-9;
444#else 1350 }
1351#endif
1352
445 struct timeval tv; 1353 struct timeval tv;
446 gettimeofday (&tv, 0); 1354 gettimeofday (&tv, 0);
447 return tv.tv_sec + tv.tv_usec * 1e-6; 1355 return tv.tv_sec + tv.tv_usec * 1e-6;
448#endif
449} 1356}
1357#endif
450 1358
451ev_tstamp inline_size 1359inline_size ev_tstamp
452get_clock (void) 1360get_clock (void)
453{ 1361{
454#if EV_USE_MONOTONIC 1362#if EV_USE_MONOTONIC
455 if (expect_true (have_monotonic)) 1363 if (expect_true (have_monotonic))
456 { 1364 {
… …
463 return ev_time (); 1371 return ev_time ();
464} 1372}
465 1373
466#if EV_MULTIPLICITY 1374#if EV_MULTIPLICITY
467ev_tstamp 1375ev_tstamp
468ev_now (EV_P) 1376ev_now (EV_P) EV_THROW
469{ 1377{
470 return ev_rt_now; 1378 return ev_rt_now;
471} 1379}
472#endif 1380#endif
473 1381
474void 1382void
475ev_sleep (ev_tstamp delay) 1383ev_sleep (ev_tstamp delay) EV_THROW
476{ 1384{
477 if (delay > 0.) 1385 if (delay > 0.)
478 { 1386 {
479#if EV_USE_NANOSLEEP 1387#if EV_USE_NANOSLEEP
480 struct timespec ts; 1388 struct timespec ts;
481 1389
482 ts.tv_sec = (time_t)delay; 1390 EV_TS_SET (ts, delay);
483 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
484
485 nanosleep (&ts, 0); 1391 nanosleep (&ts, 0);
486#elif defined(_WIN32) 1392#elif defined _WIN32
487 Sleep ((unsigned long)(delay * 1e3)); 1393 Sleep ((unsigned long)(delay * 1e3));
488#else 1394#else
489 struct timeval tv; 1395 struct timeval tv;
490 1396
491 tv.tv_sec = (time_t)delay; 1397 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
492 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1398 /* something not guaranteed by newer posix versions, but guaranteed */
493 1399 /* by older ones */
1400 EV_TV_SET (tv, delay);
494 select (0, 0, 0, 0, &tv); 1401 select (0, 0, 0, 0, &tv);
495#endif 1402#endif
496 } 1403 }
497} 1404}
498 1405
499/*****************************************************************************/ 1406/*****************************************************************************/
500 1407
501int inline_size 1408#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1409
1410/* find a suitable new size for the given array, */
1411/* hopefully by rounding to a nice-to-malloc size */
1412inline_size int
502array_nextsize (int elem, int cur, int cnt) 1413array_nextsize (int elem, int cur, int cnt)
503{ 1414{
504 int ncur = cur + 1; 1415 int ncur = cur + 1;
505 1416
506 do 1417 do
507 ncur <<= 1; 1418 ncur <<= 1;
508 while (cnt > ncur); 1419 while (cnt > ncur);
509 1420
510 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1421 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
511 if (elem * ncur > 4096) 1422 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
512 { 1423 {
513 ncur *= elem; 1424 ncur *= elem;
514 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1425 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
515 ncur = ncur - sizeof (void *) * 4; 1426 ncur = ncur - sizeof (void *) * 4;
516 ncur /= elem; 1427 ncur /= elem;
517 } 1428 }
518 1429
519 return ncur; 1430 return ncur;
520} 1431}
521 1432
522static noinline void * 1433static void * noinline ecb_cold
523array_realloc (int elem, void *base, int *cur, int cnt) 1434array_realloc (int elem, void *base, int *cur, int cnt)
524{ 1435{
525 *cur = array_nextsize (elem, *cur, cnt); 1436 *cur = array_nextsize (elem, *cur, cnt);
526 return ev_realloc (base, elem * *cur); 1437 return ev_realloc (base, elem * *cur);
527} 1438}
1439
1440#define array_init_zero(base,count) \
1441 memset ((void *)(base), 0, sizeof (*(base)) * (count))
528 1442
529#define array_needsize(type,base,cur,cnt,init) \ 1443#define array_needsize(type,base,cur,cnt,init) \
530 if (expect_false ((cnt) > (cur))) \ 1444 if (expect_false ((cnt) > (cur))) \
531 { \ 1445 { \
532 int ocur_ = (cur); \ 1446 int ecb_unused ocur_ = (cur); \
533 (base) = (type *)array_realloc \ 1447 (base) = (type *)array_realloc \
534 (sizeof (type), (base), &(cur), (cnt)); \ 1448 (sizeof (type), (base), &(cur), (cnt)); \
535 init ((base) + (ocur_), (cur) - ocur_); \ 1449 init ((base) + (ocur_), (cur) - ocur_); \
536 } 1450 }
537 1451
… …
544 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1458 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
545 } 1459 }
546#endif 1460#endif
547 1461
548#define array_free(stem, idx) \ 1462#define array_free(stem, idx) \
549 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1463 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
550 1464
551/*****************************************************************************/ 1465/*****************************************************************************/
552 1466
1467/* dummy callback for pending events */
1468static void noinline
1469pendingcb (EV_P_ ev_prepare *w, int revents)
1470{
1471}
1472
553void noinline 1473void noinline
554ev_feed_event (EV_P_ void *w, int revents) 1474ev_feed_event (EV_P_ void *w, int revents) EV_THROW
555{ 1475{
556 W w_ = (W)w; 1476 W w_ = (W)w;
557 int pri = ABSPRI (w_); 1477 int pri = ABSPRI (w_);
558 1478
559 if (expect_false (w_->pending)) 1479 if (expect_false (w_->pending))
… …
563 w_->pending = ++pendingcnt [pri]; 1483 w_->pending = ++pendingcnt [pri];
564 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1484 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
565 pendings [pri][w_->pending - 1].w = w_; 1485 pendings [pri][w_->pending - 1].w = w_;
566 pendings [pri][w_->pending - 1].events = revents; 1486 pendings [pri][w_->pending - 1].events = revents;
567 } 1487 }
568}
569 1488
570void inline_speed 1489 pendingpri = NUMPRI - 1;
1490}
1491
1492inline_speed void
1493feed_reverse (EV_P_ W w)
1494{
1495 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1496 rfeeds [rfeedcnt++] = w;
1497}
1498
1499inline_size void
1500feed_reverse_done (EV_P_ int revents)
1501{
1502 do
1503 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1504 while (rfeedcnt);
1505}
1506
1507inline_speed void
571queue_events (EV_P_ W *events, int eventcnt, int type) 1508queue_events (EV_P_ W *events, int eventcnt, int type)
572{ 1509{
573 int i; 1510 int i;
574 1511
575 for (i = 0; i < eventcnt; ++i) 1512 for (i = 0; i < eventcnt; ++i)
576 ev_feed_event (EV_A_ events [i], type); 1513 ev_feed_event (EV_A_ events [i], type);
577} 1514}
578 1515
579/*****************************************************************************/ 1516/*****************************************************************************/
580 1517
581void inline_size 1518inline_speed void
582anfds_init (ANFD *base, int count)
583{
584 while (count--)
585 {
586 base->head = 0;
587 base->events = EV_NONE;
588 base->reify = 0;
589
590 ++base;
591 }
592}
593
594void inline_speed
595fd_event (EV_P_ int fd, int revents) 1519fd_event_nocheck (EV_P_ int fd, int revents)
596{ 1520{
597 ANFD *anfd = anfds + fd; 1521 ANFD *anfd = anfds + fd;
598 ev_io *w; 1522 ev_io *w;
599 1523
600 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1524 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
604 if (ev) 1528 if (ev)
605 ev_feed_event (EV_A_ (W)w, ev); 1529 ev_feed_event (EV_A_ (W)w, ev);
606 } 1530 }
607} 1531}
608 1532
1533/* do not submit kernel events for fds that have reify set */
1534/* because that means they changed while we were polling for new events */
1535inline_speed void
1536fd_event (EV_P_ int fd, int revents)
1537{
1538 ANFD *anfd = anfds + fd;
1539
1540 if (expect_true (!anfd->reify))
1541 fd_event_nocheck (EV_A_ fd, revents);
1542}
1543
609void 1544void
610ev_feed_fd_event (EV_P_ int fd, int revents) 1545ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
611{ 1546{
612 if (fd >= 0 && fd < anfdmax) 1547 if (fd >= 0 && fd < anfdmax)
613 fd_event (EV_A_ fd, revents); 1548 fd_event_nocheck (EV_A_ fd, revents);
614} 1549}
615 1550
616void inline_size 1551/* make sure the external fd watch events are in-sync */
1552/* with the kernel/libev internal state */
1553inline_size void
617fd_reify (EV_P) 1554fd_reify (EV_P)
618{ 1555{
619 int i; 1556 int i;
1557
1558#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1559 for (i = 0; i < fdchangecnt; ++i)
1560 {
1561 int fd = fdchanges [i];
1562 ANFD *anfd = anfds + fd;
1563
1564 if (anfd->reify & EV__IOFDSET && anfd->head)
1565 {
1566 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1567
1568 if (handle != anfd->handle)
1569 {
1570 unsigned long arg;
1571
1572 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1573
1574 /* handle changed, but fd didn't - we need to do it in two steps */
1575 backend_modify (EV_A_ fd, anfd->events, 0);
1576 anfd->events = 0;
1577 anfd->handle = handle;
1578 }
1579 }
1580 }
1581#endif
620 1582
621 for (i = 0; i < fdchangecnt; ++i) 1583 for (i = 0; i < fdchangecnt; ++i)
622 { 1584 {
623 int fd = fdchanges [i]; 1585 int fd = fdchanges [i];
624 ANFD *anfd = anfds + fd; 1586 ANFD *anfd = anfds + fd;
625 ev_io *w; 1587 ev_io *w;
626 1588
627 unsigned char events = 0; 1589 unsigned char o_events = anfd->events;
1590 unsigned char o_reify = anfd->reify;
628 1591
629 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1592 anfd->reify = 0;
630 events |= (unsigned char)w->events;
631 1593
632#if EV_SELECT_IS_WINSOCKET 1594 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
633 if (events)
634 { 1595 {
635 unsigned long argp; 1596 anfd->events = 0;
636 #ifdef EV_FD_TO_WIN32_HANDLE 1597
637 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
638 #else 1599 anfd->events |= (unsigned char)w->events;
639 anfd->handle = _get_osfhandle (fd); 1600
640 #endif 1601 if (o_events != anfd->events)
641 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1602 o_reify = EV__IOFDSET; /* actually |= */
642 } 1603 }
643#endif
644 1604
645 { 1605 if (o_reify & EV__IOFDSET)
646 unsigned char o_events = anfd->events;
647 unsigned char o_reify = anfd->reify;
648
649 anfd->reify = 0;
650 anfd->events = events;
651
652 if (o_events != events || o_reify & EV_IOFDSET)
653 backend_modify (EV_A_ fd, o_events, events); 1606 backend_modify (EV_A_ fd, o_events, anfd->events);
654 }
655 } 1607 }
656 1608
657 fdchangecnt = 0; 1609 fdchangecnt = 0;
658} 1610}
659 1611
660void inline_size 1612/* something about the given fd changed */
1613inline_size void
661fd_change (EV_P_ int fd, int flags) 1614fd_change (EV_P_ int fd, int flags)
662{ 1615{
663 unsigned char reify = anfds [fd].reify; 1616 unsigned char reify = anfds [fd].reify;
664 anfds [fd].reify |= flags; 1617 anfds [fd].reify |= flags;
665 1618
… …
669 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1622 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
670 fdchanges [fdchangecnt - 1] = fd; 1623 fdchanges [fdchangecnt - 1] = fd;
671 } 1624 }
672} 1625}
673 1626
674void inline_speed 1627/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1628inline_speed void ecb_cold
675fd_kill (EV_P_ int fd) 1629fd_kill (EV_P_ int fd)
676{ 1630{
677 ev_io *w; 1631 ev_io *w;
678 1632
679 while ((w = (ev_io *)anfds [fd].head)) 1633 while ((w = (ev_io *)anfds [fd].head))
… …
681 ev_io_stop (EV_A_ w); 1635 ev_io_stop (EV_A_ w);
682 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1636 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
683 } 1637 }
684} 1638}
685 1639
686int inline_size 1640/* check whether the given fd is actually valid, for error recovery */
1641inline_size int ecb_cold
687fd_valid (int fd) 1642fd_valid (int fd)
688{ 1643{
689#ifdef _WIN32 1644#ifdef _WIN32
690 return _get_osfhandle (fd) != -1; 1645 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
691#else 1646#else
692 return fcntl (fd, F_GETFD) != -1; 1647 return fcntl (fd, F_GETFD) != -1;
693#endif 1648#endif
694} 1649}
695 1650
696/* called on EBADF to verify fds */ 1651/* called on EBADF to verify fds */
697static void noinline 1652static void noinline ecb_cold
698fd_ebadf (EV_P) 1653fd_ebadf (EV_P)
699{ 1654{
700 int fd; 1655 int fd;
701 1656
702 for (fd = 0; fd < anfdmax; ++fd) 1657 for (fd = 0; fd < anfdmax; ++fd)
703 if (anfds [fd].events) 1658 if (anfds [fd].events)
704 if (!fd_valid (fd) == -1 && errno == EBADF) 1659 if (!fd_valid (fd) && errno == EBADF)
705 fd_kill (EV_A_ fd); 1660 fd_kill (EV_A_ fd);
706} 1661}
707 1662
708/* called on ENOMEM in select/poll to kill some fds and retry */ 1663/* called on ENOMEM in select/poll to kill some fds and retry */
709static void noinline 1664static void noinline ecb_cold
710fd_enomem (EV_P) 1665fd_enomem (EV_P)
711{ 1666{
712 int fd; 1667 int fd;
713 1668
714 for (fd = anfdmax; fd--; ) 1669 for (fd = anfdmax; fd--; )
715 if (anfds [fd].events) 1670 if (anfds [fd].events)
716 { 1671 {
717 fd_kill (EV_A_ fd); 1672 fd_kill (EV_A_ fd);
718 return; 1673 break;
719 } 1674 }
720} 1675}
721 1676
722/* usually called after fork if backend needs to re-arm all fds from scratch */ 1677/* usually called after fork if backend needs to re-arm all fds from scratch */
723static void noinline 1678static void noinline
… …
727 1682
728 for (fd = 0; fd < anfdmax; ++fd) 1683 for (fd = 0; fd < anfdmax; ++fd)
729 if (anfds [fd].events) 1684 if (anfds [fd].events)
730 { 1685 {
731 anfds [fd].events = 0; 1686 anfds [fd].events = 0;
1687 anfds [fd].emask = 0;
732 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1688 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
733 } 1689 }
734} 1690}
735 1691
736/*****************************************************************************/ 1692/* used to prepare libev internal fd's */
737 1693/* this is not fork-safe */
738void inline_speed 1694inline_speed void
739upheap (WT *heap, int k)
740{
741 WT w = heap [k];
742
743 while (k)
744 {
745 int p = (k - 1) >> 1;
746
747 if (heap [p]->at <= w->at)
748 break;
749
750 heap [k] = heap [p];
751 ((W)heap [k])->active = k + 1;
752 k = p;
753 }
754
755 heap [k] = w;
756 ((W)heap [k])->active = k + 1;
757}
758
759void inline_speed
760downheap (WT *heap, int N, int k)
761{
762 WT w = heap [k];
763
764 for (;;)
765 {
766 int c = (k << 1) + 1;
767
768 if (c >= N)
769 break;
770
771 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
772 ? 1 : 0;
773
774 if (w->at <= heap [c]->at)
775 break;
776
777 heap [k] = heap [c];
778 ((W)heap [k])->active = k + 1;
779
780 k = c;
781 }
782
783 heap [k] = w;
784 ((W)heap [k])->active = k + 1;
785}
786
787void inline_size
788adjustheap (WT *heap, int N, int k)
789{
790 upheap (heap, k);
791 downheap (heap, N, k);
792}
793
794/*****************************************************************************/
795
796typedef struct
797{
798 WL head;
799 EV_ATOMIC_T gotsig;
800} ANSIG;
801
802static ANSIG *signals;
803static int signalmax;
804
805static EV_ATOMIC_T gotsig;
806
807void inline_size
808signals_init (ANSIG *base, int count)
809{
810 while (count--)
811 {
812 base->head = 0;
813 base->gotsig = 0;
814
815 ++base;
816 }
817}
818
819/*****************************************************************************/
820
821void inline_speed
822fd_intern (int fd) 1695fd_intern (int fd)
823{ 1696{
824#ifdef _WIN32 1697#ifdef _WIN32
825 int arg = 1; 1698 unsigned long arg = 1;
826 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1699 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
827#else 1700#else
828 fcntl (fd, F_SETFD, FD_CLOEXEC); 1701 fcntl (fd, F_SETFD, FD_CLOEXEC);
829 fcntl (fd, F_SETFL, O_NONBLOCK); 1702 fcntl (fd, F_SETFL, O_NONBLOCK);
830#endif 1703#endif
831} 1704}
832 1705
1706/*****************************************************************************/
1707
1708/*
1709 * the heap functions want a real array index. array index 0 is guaranteed to not
1710 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1711 * the branching factor of the d-tree.
1712 */
1713
1714/*
1715 * at the moment we allow libev the luxury of two heaps,
1716 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1717 * which is more cache-efficient.
1718 * the difference is about 5% with 50000+ watchers.
1719 */
1720#if EV_USE_4HEAP
1721
1722#define DHEAP 4
1723#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1724#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1725#define UPHEAP_DONE(p,k) ((p) == (k))
1726
1727/* away from the root */
1728inline_speed void
1729downheap (ANHE *heap, int N, int k)
1730{
1731 ANHE he = heap [k];
1732 ANHE *E = heap + N + HEAP0;
1733
1734 for (;;)
1735 {
1736 ev_tstamp minat;
1737 ANHE *minpos;
1738 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1739
1740 /* find minimum child */
1741 if (expect_true (pos + DHEAP - 1 < E))
1742 {
1743 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1744 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1745 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1746 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1747 }
1748 else if (pos < E)
1749 {
1750 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1751 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1752 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1753 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1754 }
1755 else
1756 break;
1757
1758 if (ANHE_at (he) <= minat)
1759 break;
1760
1761 heap [k] = *minpos;
1762 ev_active (ANHE_w (*minpos)) = k;
1763
1764 k = minpos - heap;
1765 }
1766
1767 heap [k] = he;
1768 ev_active (ANHE_w (he)) = k;
1769}
1770
1771#else /* 4HEAP */
1772
1773#define HEAP0 1
1774#define HPARENT(k) ((k) >> 1)
1775#define UPHEAP_DONE(p,k) (!(p))
1776
1777/* away from the root */
1778inline_speed void
1779downheap (ANHE *heap, int N, int k)
1780{
1781 ANHE he = heap [k];
1782
1783 for (;;)
1784 {
1785 int c = k << 1;
1786
1787 if (c >= N + HEAP0)
1788 break;
1789
1790 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1791 ? 1 : 0;
1792
1793 if (ANHE_at (he) <= ANHE_at (heap [c]))
1794 break;
1795
1796 heap [k] = heap [c];
1797 ev_active (ANHE_w (heap [k])) = k;
1798
1799 k = c;
1800 }
1801
1802 heap [k] = he;
1803 ev_active (ANHE_w (he)) = k;
1804}
1805#endif
1806
1807/* towards the root */
1808inline_speed void
1809upheap (ANHE *heap, int k)
1810{
1811 ANHE he = heap [k];
1812
1813 for (;;)
1814 {
1815 int p = HPARENT (k);
1816
1817 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1818 break;
1819
1820 heap [k] = heap [p];
1821 ev_active (ANHE_w (heap [k])) = k;
1822 k = p;
1823 }
1824
1825 heap [k] = he;
1826 ev_active (ANHE_w (he)) = k;
1827}
1828
1829/* move an element suitably so it is in a correct place */
1830inline_size void
1831adjustheap (ANHE *heap, int N, int k)
1832{
1833 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1834 upheap (heap, k);
1835 else
1836 downheap (heap, N, k);
1837}
1838
1839/* rebuild the heap: this function is used only once and executed rarely */
1840inline_size void
1841reheap (ANHE *heap, int N)
1842{
1843 int i;
1844
1845 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1846 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1847 for (i = 0; i < N; ++i)
1848 upheap (heap, i + HEAP0);
1849}
1850
1851/*****************************************************************************/
1852
1853/* associate signal watchers to a signal signal */
1854typedef struct
1855{
1856 EV_ATOMIC_T pending;
1857#if EV_MULTIPLICITY
1858 EV_P;
1859#endif
1860 WL head;
1861} ANSIG;
1862
1863static ANSIG signals [EV_NSIG - 1];
1864
1865/*****************************************************************************/
1866
1867#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1868
833static void noinline 1869static void noinline ecb_cold
834evpipe_init (EV_P) 1870evpipe_init (EV_P)
835{ 1871{
836 if (!ev_is_active (&pipeev)) 1872 if (!ev_is_active (&pipe_w))
837 { 1873 {
838#if EV_USE_EVENTFD 1874# if EV_USE_EVENTFD
1875 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1876 if (evfd < 0 && errno == EINVAL)
839 if ((evfd = eventfd (0, 0)) >= 0) 1877 evfd = eventfd (0, 0);
1878
1879 if (evfd >= 0)
840 { 1880 {
841 evpipe [0] = -1; 1881 evpipe [0] = -1;
842 fd_intern (evfd); 1882 fd_intern (evfd); /* doing it twice doesn't hurt */
843 ev_io_set (&pipeev, evfd, EV_READ); 1883 ev_io_set (&pipe_w, evfd, EV_READ);
844 } 1884 }
845 else 1885 else
846#endif 1886# endif
847 { 1887 {
848 while (pipe (evpipe)) 1888 while (pipe (evpipe))
849 syserr ("(libev) error creating signal/async pipe"); 1889 ev_syserr ("(libev) error creating signal/async pipe");
850 1890
851 fd_intern (evpipe [0]); 1891 fd_intern (evpipe [0]);
852 fd_intern (evpipe [1]); 1892 fd_intern (evpipe [1]);
853 ev_io_set (&pipeev, evpipe [0], EV_READ); 1893 ev_io_set (&pipe_w, evpipe [0], EV_READ);
854 } 1894 }
855 1895
856 ev_io_start (EV_A_ &pipeev); 1896 ev_io_start (EV_A_ &pipe_w);
857 ev_unref (EV_A); /* watcher should not keep loop alive */ 1897 ev_unref (EV_A); /* watcher should not keep loop alive */
858 } 1898 }
859} 1899}
860 1900
861void inline_size 1901inline_speed void
862evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1902evpipe_write (EV_P_ EV_ATOMIC_T *flag)
863{ 1903{
864 if (!*flag) 1904 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1905
1906 if (expect_true (*flag))
1907 return;
1908
1909 *flag = 1;
1910 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1911
1912 pipe_write_skipped = 1;
1913
1914 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1915
1916 if (pipe_write_wanted)
865 { 1917 {
1918 int old_errno;
1919
1920 pipe_write_skipped = 0;
1921 ECB_MEMORY_FENCE_RELEASE;
1922
866 int old_errno = errno; /* save errno because write might clobber it */ 1923 old_errno = errno; /* save errno because write will clobber it */
867
868 *flag = 1;
869 1924
870#if EV_USE_EVENTFD 1925#if EV_USE_EVENTFD
871 if (evfd >= 0) 1926 if (evfd >= 0)
872 { 1927 {
873 uint64_t counter = 1; 1928 uint64_t counter = 1;
874 write (evfd, &counter, sizeof (uint64_t)); 1929 write (evfd, &counter, sizeof (uint64_t));
875 } 1930 }
876 else 1931 else
877#endif 1932#endif
1933 {
1934#ifdef _WIN32
1935 WSABUF buf;
1936 DWORD sent;
1937 buf.buf = &buf;
1938 buf.len = 1;
1939 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1940#else
878 write (evpipe [1], &old_errno, 1); 1941 write (evpipe [1], &(evpipe [1]), 1);
1942#endif
1943 }
879 1944
880 errno = old_errno; 1945 errno = old_errno;
881 } 1946 }
882} 1947}
883 1948
1949/* called whenever the libev signal pipe */
1950/* got some events (signal, async) */
884static void 1951static void
885pipecb (EV_P_ ev_io *iow, int revents) 1952pipecb (EV_P_ ev_io *iow, int revents)
886{ 1953{
1954 int i;
1955
1956 if (revents & EV_READ)
1957 {
887#if EV_USE_EVENTFD 1958#if EV_USE_EVENTFD
888 if (evfd >= 0) 1959 if (evfd >= 0)
889 { 1960 {
890 uint64_t counter = 1; 1961 uint64_t counter;
891 read (evfd, &counter, sizeof (uint64_t)); 1962 read (evfd, &counter, sizeof (uint64_t));
892 } 1963 }
893 else 1964 else
894#endif 1965#endif
895 { 1966 {
896 char dummy; 1967 char dummy[4];
1968#ifdef _WIN32
1969 WSABUF buf;
1970 DWORD recvd;
1971 DWORD flags = 0;
1972 buf.buf = dummy;
1973 buf.len = sizeof (dummy);
1974 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
1975#else
897 read (evpipe [0], &dummy, 1); 1976 read (evpipe [0], &dummy, sizeof (dummy));
1977#endif
1978 }
1979 }
1980
1981 pipe_write_skipped = 0;
1982
1983 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1984
1985#if EV_SIGNAL_ENABLE
1986 if (sig_pending)
898 } 1987 {
1988 sig_pending = 0;
899 1989
900 if (gotsig && ev_is_default_loop (EV_A)) 1990 ECB_MEMORY_FENCE;
901 {
902 int signum;
903 gotsig = 0;
904 1991
905 for (signum = signalmax; signum--; ) 1992 for (i = EV_NSIG - 1; i--; )
906 if (signals [signum].gotsig) 1993 if (expect_false (signals [i].pending))
907 ev_feed_signal_event (EV_A_ signum + 1); 1994 ev_feed_signal_event (EV_A_ i + 1);
908 } 1995 }
1996#endif
909 1997
910#if EV_ASYNC_ENABLE 1998#if EV_ASYNC_ENABLE
911 if (gotasync) 1999 if (async_pending)
912 { 2000 {
913 int i; 2001 async_pending = 0;
914 gotasync = 0; 2002
2003 ECB_MEMORY_FENCE;
915 2004
916 for (i = asynccnt; i--; ) 2005 for (i = asynccnt; i--; )
917 if (asyncs [i]->sent) 2006 if (asyncs [i]->sent)
918 { 2007 {
919 asyncs [i]->sent = 0; 2008 asyncs [i]->sent = 0;
2009 ECB_MEMORY_FENCE_RELEASE;
920 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2010 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
921 } 2011 }
922 } 2012 }
923#endif 2013#endif
924} 2014}
925 2015
926/*****************************************************************************/ 2016/*****************************************************************************/
927 2017
2018void
2019ev_feed_signal (int signum) EV_THROW
2020{
2021#if EV_MULTIPLICITY
2022 EV_P = signals [signum - 1].loop;
2023
2024 if (!EV_A)
2025 return;
2026#endif
2027
2028 if (!ev_active (&pipe_w))
2029 return;
2030
2031 signals [signum - 1].pending = 1;
2032 evpipe_write (EV_A_ &sig_pending);
2033}
2034
928static void 2035static void
929ev_sighandler (int signum) 2036ev_sighandler (int signum)
930{ 2037{
2038#ifdef _WIN32
2039 signal (signum, ev_sighandler);
2040#endif
2041
2042 ev_feed_signal (signum);
2043}
2044
2045void noinline
2046ev_feed_signal_event (EV_P_ int signum) EV_THROW
2047{
2048 WL w;
2049
2050 if (expect_false (signum <= 0 || signum > EV_NSIG))
2051 return;
2052
2053 --signum;
2054
931#if EV_MULTIPLICITY 2055#if EV_MULTIPLICITY
932 struct ev_loop *loop = &default_loop_struct; 2056 /* it is permissible to try to feed a signal to the wrong loop */
933#endif 2057 /* or, likely more useful, feeding a signal nobody is waiting for */
934 2058
935#if _WIN32 2059 if (expect_false (signals [signum].loop != EV_A))
936 signal (signum, ev_sighandler);
937#endif
938
939 signals [signum - 1].gotsig = 1;
940 evpipe_write (EV_A_ &gotsig);
941}
942
943void noinline
944ev_feed_signal_event (EV_P_ int signum)
945{
946 WL w;
947
948#if EV_MULTIPLICITY
949 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
950#endif
951
952 --signum;
953
954 if (signum < 0 || signum >= signalmax)
955 return; 2060 return;
2061#endif
956 2062
957 signals [signum].gotsig = 0; 2063 signals [signum].pending = 0;
2064 ECB_MEMORY_FENCE_RELEASE;
958 2065
959 for (w = signals [signum].head; w; w = w->next) 2066 for (w = signals [signum].head; w; w = w->next)
960 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2067 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
961} 2068}
962 2069
2070#if EV_USE_SIGNALFD
2071static void
2072sigfdcb (EV_P_ ev_io *iow, int revents)
2073{
2074 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2075
2076 for (;;)
2077 {
2078 ssize_t res = read (sigfd, si, sizeof (si));
2079
2080 /* not ISO-C, as res might be -1, but works with SuS */
2081 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2082 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2083
2084 if (res < (ssize_t)sizeof (si))
2085 break;
2086 }
2087}
2088#endif
2089
2090#endif
2091
963/*****************************************************************************/ 2092/*****************************************************************************/
964 2093
2094#if EV_CHILD_ENABLE
965static WL childs [EV_PID_HASHSIZE]; 2095static WL childs [EV_PID_HASHSIZE];
966
967#ifndef _WIN32
968 2096
969static ev_signal childev; 2097static ev_signal childev;
970 2098
971#ifndef WIFCONTINUED 2099#ifndef WIFCONTINUED
972# define WIFCONTINUED(status) 0 2100# define WIFCONTINUED(status) 0
973#endif 2101#endif
974 2102
975void inline_speed 2103/* handle a single child status event */
2104inline_speed void
976child_reap (EV_P_ int chain, int pid, int status) 2105child_reap (EV_P_ int chain, int pid, int status)
977{ 2106{
978 ev_child *w; 2107 ev_child *w;
979 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2108 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
980 2109
981 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2110 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
982 { 2111 {
983 if ((w->pid == pid || !w->pid) 2112 if ((w->pid == pid || !w->pid)
984 && (!traced || (w->flags & 1))) 2113 && (!traced || (w->flags & 1)))
985 { 2114 {
986 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2115 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
993 2122
994#ifndef WCONTINUED 2123#ifndef WCONTINUED
995# define WCONTINUED 0 2124# define WCONTINUED 0
996#endif 2125#endif
997 2126
2127/* called on sigchld etc., calls waitpid */
998static void 2128static void
999childcb (EV_P_ ev_signal *sw, int revents) 2129childcb (EV_P_ ev_signal *sw, int revents)
1000{ 2130{
1001 int pid, status; 2131 int pid, status;
1002 2132
… …
1010 /* make sure we are called again until all children have been reaped */ 2140 /* make sure we are called again until all children have been reaped */
1011 /* we need to do it this way so that the callback gets called before we continue */ 2141 /* we need to do it this way so that the callback gets called before we continue */
1012 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2142 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1013 2143
1014 child_reap (EV_A_ pid, pid, status); 2144 child_reap (EV_A_ pid, pid, status);
1015 if (EV_PID_HASHSIZE > 1) 2145 if ((EV_PID_HASHSIZE) > 1)
1016 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2146 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1017} 2147}
1018 2148
1019#endif 2149#endif
1020 2150
1021/*****************************************************************************/ 2151/*****************************************************************************/
1022 2152
2153#if EV_USE_IOCP
2154# include "ev_iocp.c"
2155#endif
1023#if EV_USE_PORT 2156#if EV_USE_PORT
1024# include "ev_port.c" 2157# include "ev_port.c"
1025#endif 2158#endif
1026#if EV_USE_KQUEUE 2159#if EV_USE_KQUEUE
1027# include "ev_kqueue.c" 2160# include "ev_kqueue.c"
… …
1034#endif 2167#endif
1035#if EV_USE_SELECT 2168#if EV_USE_SELECT
1036# include "ev_select.c" 2169# include "ev_select.c"
1037#endif 2170#endif
1038 2171
1039int 2172int ecb_cold
1040ev_version_major (void) 2173ev_version_major (void) EV_THROW
1041{ 2174{
1042 return EV_VERSION_MAJOR; 2175 return EV_VERSION_MAJOR;
1043} 2176}
1044 2177
1045int 2178int ecb_cold
1046ev_version_minor (void) 2179ev_version_minor (void) EV_THROW
1047{ 2180{
1048 return EV_VERSION_MINOR; 2181 return EV_VERSION_MINOR;
1049} 2182}
1050 2183
1051/* return true if we are running with elevated privileges and should ignore env variables */ 2184/* return true if we are running with elevated privileges and should ignore env variables */
1052int inline_size 2185int inline_size ecb_cold
1053enable_secure (void) 2186enable_secure (void)
1054{ 2187{
1055#ifdef _WIN32 2188#ifdef _WIN32
1056 return 0; 2189 return 0;
1057#else 2190#else
1058 return getuid () != geteuid () 2191 return getuid () != geteuid ()
1059 || getgid () != getegid (); 2192 || getgid () != getegid ();
1060#endif 2193#endif
1061} 2194}
1062 2195
1063unsigned int 2196unsigned int ecb_cold
1064ev_supported_backends (void) 2197ev_supported_backends (void) EV_THROW
1065{ 2198{
1066 unsigned int flags = 0; 2199 unsigned int flags = 0;
1067 2200
1068 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2201 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1069 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2202 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1072 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2205 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1073 2206
1074 return flags; 2207 return flags;
1075} 2208}
1076 2209
1077unsigned int 2210unsigned int ecb_cold
1078ev_recommended_backends (void) 2211ev_recommended_backends (void) EV_THROW
1079{ 2212{
1080 unsigned int flags = ev_supported_backends (); 2213 unsigned int flags = ev_supported_backends ();
1081 2214
1082#ifndef __NetBSD__ 2215#ifndef __NetBSD__
1083 /* kqueue is borked on everything but netbsd apparently */ 2216 /* kqueue is borked on everything but netbsd apparently */
1084 /* it usually doesn't work correctly on anything but sockets and pipes */ 2217 /* it usually doesn't work correctly on anything but sockets and pipes */
1085 flags &= ~EVBACKEND_KQUEUE; 2218 flags &= ~EVBACKEND_KQUEUE;
1086#endif 2219#endif
1087#ifdef __APPLE__ 2220#ifdef __APPLE__
1088 // flags &= ~EVBACKEND_KQUEUE; for documentation 2221 /* only select works correctly on that "unix-certified" platform */
1089 flags &= ~EVBACKEND_POLL; 2222 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2223 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2224#endif
2225#ifdef __FreeBSD__
2226 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1090#endif 2227#endif
1091 2228
1092 return flags; 2229 return flags;
1093} 2230}
1094 2231
2232unsigned int ecb_cold
2233ev_embeddable_backends (void) EV_THROW
2234{
2235 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2236
2237 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2238 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2239 flags &= ~EVBACKEND_EPOLL;
2240
2241 return flags;
2242}
2243
1095unsigned int 2244unsigned int
1096ev_embeddable_backends (void) 2245ev_backend (EV_P) EV_THROW
1097{ 2246{
1098 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2247 return backend;
1099
1100 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1101 /* please fix it and tell me how to detect the fix */
1102 flags &= ~EVBACKEND_EPOLL;
1103
1104 return flags;
1105} 2248}
1106 2249
2250#if EV_FEATURE_API
1107unsigned int 2251unsigned int
1108ev_backend (EV_P) 2252ev_iteration (EV_P) EV_THROW
1109{ 2253{
1110 return backend; 2254 return loop_count;
1111} 2255}
1112 2256
1113unsigned int 2257unsigned int
1114ev_loop_count (EV_P) 2258ev_depth (EV_P) EV_THROW
1115{ 2259{
1116 return loop_count; 2260 return loop_depth;
1117} 2261}
1118 2262
1119void 2263void
1120ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2264ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1121{ 2265{
1122 io_blocktime = interval; 2266 io_blocktime = interval;
1123} 2267}
1124 2268
1125void 2269void
1126ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2270ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1127{ 2271{
1128 timeout_blocktime = interval; 2272 timeout_blocktime = interval;
1129} 2273}
1130 2274
2275void
2276ev_set_userdata (EV_P_ void *data) EV_THROW
2277{
2278 userdata = data;
2279}
2280
2281void *
2282ev_userdata (EV_P) EV_THROW
2283{
2284 return userdata;
2285}
2286
2287void
2288ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2289{
2290 invoke_cb = invoke_pending_cb;
2291}
2292
2293void
2294ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2295{
2296 release_cb = release;
2297 acquire_cb = acquire;
2298}
2299#endif
2300
2301/* initialise a loop structure, must be zero-initialised */
1131static void noinline 2302static void noinline ecb_cold
1132loop_init (EV_P_ unsigned int flags) 2303loop_init (EV_P_ unsigned int flags) EV_THROW
1133{ 2304{
1134 if (!backend) 2305 if (!backend)
1135 { 2306 {
2307 origflags = flags;
2308
2309#if EV_USE_REALTIME
2310 if (!have_realtime)
2311 {
2312 struct timespec ts;
2313
2314 if (!clock_gettime (CLOCK_REALTIME, &ts))
2315 have_realtime = 1;
2316 }
2317#endif
2318
1136#if EV_USE_MONOTONIC 2319#if EV_USE_MONOTONIC
2320 if (!have_monotonic)
1137 { 2321 {
1138 struct timespec ts; 2322 struct timespec ts;
2323
1139 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2324 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1140 have_monotonic = 1; 2325 have_monotonic = 1;
1141 } 2326 }
1142#endif
1143
1144 ev_rt_now = ev_time ();
1145 mn_now = get_clock ();
1146 now_floor = mn_now;
1147 rtmn_diff = ev_rt_now - mn_now;
1148
1149 io_blocktime = 0.;
1150 timeout_blocktime = 0.;
1151 backend = 0;
1152 backend_fd = -1;
1153 gotasync = 0;
1154#if EV_USE_INOTIFY
1155 fs_fd = -2;
1156#endif 2327#endif
1157 2328
1158 /* pid check not overridable via env */ 2329 /* pid check not overridable via env */
1159#ifndef _WIN32 2330#ifndef _WIN32
1160 if (flags & EVFLAG_FORKCHECK) 2331 if (flags & EVFLAG_FORKCHECK)
… …
1164 if (!(flags & EVFLAG_NOENV) 2335 if (!(flags & EVFLAG_NOENV)
1165 && !enable_secure () 2336 && !enable_secure ()
1166 && getenv ("LIBEV_FLAGS")) 2337 && getenv ("LIBEV_FLAGS"))
1167 flags = atoi (getenv ("LIBEV_FLAGS")); 2338 flags = atoi (getenv ("LIBEV_FLAGS"));
1168 2339
1169 if (!(flags & 0x0000ffffUL)) 2340 ev_rt_now = ev_time ();
2341 mn_now = get_clock ();
2342 now_floor = mn_now;
2343 rtmn_diff = ev_rt_now - mn_now;
2344#if EV_FEATURE_API
2345 invoke_cb = ev_invoke_pending;
2346#endif
2347
2348 io_blocktime = 0.;
2349 timeout_blocktime = 0.;
2350 backend = 0;
2351 backend_fd = -1;
2352 sig_pending = 0;
2353#if EV_ASYNC_ENABLE
2354 async_pending = 0;
2355#endif
2356 pipe_write_skipped = 0;
2357 pipe_write_wanted = 0;
2358#if EV_USE_INOTIFY
2359 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2360#endif
2361#if EV_USE_SIGNALFD
2362 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2363#endif
2364
2365 if (!(flags & EVBACKEND_MASK))
1170 flags |= ev_recommended_backends (); 2366 flags |= ev_recommended_backends ();
1171 2367
2368#if EV_USE_IOCP
2369 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2370#endif
1172#if EV_USE_PORT 2371#if EV_USE_PORT
1173 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2372 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1174#endif 2373#endif
1175#if EV_USE_KQUEUE 2374#if EV_USE_KQUEUE
1176 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2375 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1183#endif 2382#endif
1184#if EV_USE_SELECT 2383#if EV_USE_SELECT
1185 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2384 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1186#endif 2385#endif
1187 2386
2387 ev_prepare_init (&pending_w, pendingcb);
2388
2389#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1188 ev_init (&pipeev, pipecb); 2390 ev_init (&pipe_w, pipecb);
1189 ev_set_priority (&pipeev, EV_MAXPRI); 2391 ev_set_priority (&pipe_w, EV_MAXPRI);
2392#endif
1190 } 2393 }
1191} 2394}
1192 2395
1193static void noinline 2396/* free up a loop structure */
2397void ecb_cold
1194loop_destroy (EV_P) 2398ev_loop_destroy (EV_P)
1195{ 2399{
1196 int i; 2400 int i;
1197 2401
2402#if EV_MULTIPLICITY
2403 /* mimic free (0) */
2404 if (!EV_A)
2405 return;
2406#endif
2407
2408#if EV_CLEANUP_ENABLE
2409 /* queue cleanup watchers (and execute them) */
2410 if (expect_false (cleanupcnt))
2411 {
2412 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2413 EV_INVOKE_PENDING;
2414 }
2415#endif
2416
2417#if EV_CHILD_ENABLE
2418 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2419 {
2420 ev_ref (EV_A); /* child watcher */
2421 ev_signal_stop (EV_A_ &childev);
2422 }
2423#endif
2424
1198 if (ev_is_active (&pipeev)) 2425 if (ev_is_active (&pipe_w))
1199 { 2426 {
1200 ev_ref (EV_A); /* signal watcher */ 2427 /*ev_ref (EV_A);*/
1201 ev_io_stop (EV_A_ &pipeev); 2428 /*ev_io_stop (EV_A_ &pipe_w);*/
1202 2429
1203#if EV_USE_EVENTFD 2430#if EV_USE_EVENTFD
1204 if (evfd >= 0) 2431 if (evfd >= 0)
1205 close (evfd); 2432 close (evfd);
1206#endif 2433#endif
1207 2434
1208 if (evpipe [0] >= 0) 2435 if (evpipe [0] >= 0)
1209 { 2436 {
1210 close (evpipe [0]); 2437 EV_WIN32_CLOSE_FD (evpipe [0]);
1211 close (evpipe [1]); 2438 EV_WIN32_CLOSE_FD (evpipe [1]);
1212 } 2439 }
1213 } 2440 }
2441
2442#if EV_USE_SIGNALFD
2443 if (ev_is_active (&sigfd_w))
2444 close (sigfd);
2445#endif
1214 2446
1215#if EV_USE_INOTIFY 2447#if EV_USE_INOTIFY
1216 if (fs_fd >= 0) 2448 if (fs_fd >= 0)
1217 close (fs_fd); 2449 close (fs_fd);
1218#endif 2450#endif
1219 2451
1220 if (backend_fd >= 0) 2452 if (backend_fd >= 0)
1221 close (backend_fd); 2453 close (backend_fd);
1222 2454
2455#if EV_USE_IOCP
2456 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2457#endif
1223#if EV_USE_PORT 2458#if EV_USE_PORT
1224 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2459 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1225#endif 2460#endif
1226#if EV_USE_KQUEUE 2461#if EV_USE_KQUEUE
1227 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2462 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1242#if EV_IDLE_ENABLE 2477#if EV_IDLE_ENABLE
1243 array_free (idle, [i]); 2478 array_free (idle, [i]);
1244#endif 2479#endif
1245 } 2480 }
1246 2481
1247 ev_free (anfds); anfdmax = 0; 2482 ev_free (anfds); anfds = 0; anfdmax = 0;
1248 2483
1249 /* have to use the microsoft-never-gets-it-right macro */ 2484 /* have to use the microsoft-never-gets-it-right macro */
2485 array_free (rfeed, EMPTY);
1250 array_free (fdchange, EMPTY); 2486 array_free (fdchange, EMPTY);
1251 array_free (timer, EMPTY); 2487 array_free (timer, EMPTY);
1252#if EV_PERIODIC_ENABLE 2488#if EV_PERIODIC_ENABLE
1253 array_free (periodic, EMPTY); 2489 array_free (periodic, EMPTY);
1254#endif 2490#endif
1255#if EV_FORK_ENABLE 2491#if EV_FORK_ENABLE
1256 array_free (fork, EMPTY); 2492 array_free (fork, EMPTY);
1257#endif 2493#endif
2494#if EV_CLEANUP_ENABLE
2495 array_free (cleanup, EMPTY);
2496#endif
1258 array_free (prepare, EMPTY); 2497 array_free (prepare, EMPTY);
1259 array_free (check, EMPTY); 2498 array_free (check, EMPTY);
1260#if EV_ASYNC_ENABLE 2499#if EV_ASYNC_ENABLE
1261 array_free (async, EMPTY); 2500 array_free (async, EMPTY);
1262#endif 2501#endif
1263 2502
1264 backend = 0; 2503 backend = 0;
1265}
1266 2504
2505#if EV_MULTIPLICITY
2506 if (ev_is_default_loop (EV_A))
2507#endif
2508 ev_default_loop_ptr = 0;
2509#if EV_MULTIPLICITY
2510 else
2511 ev_free (EV_A);
2512#endif
2513}
2514
2515#if EV_USE_INOTIFY
1267void inline_size infy_fork (EV_P); 2516inline_size void infy_fork (EV_P);
2517#endif
1268 2518
1269void inline_size 2519inline_size void
1270loop_fork (EV_P) 2520loop_fork (EV_P)
1271{ 2521{
1272#if EV_USE_PORT 2522#if EV_USE_PORT
1273 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2523 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1274#endif 2524#endif
… …
1280#endif 2530#endif
1281#if EV_USE_INOTIFY 2531#if EV_USE_INOTIFY
1282 infy_fork (EV_A); 2532 infy_fork (EV_A);
1283#endif 2533#endif
1284 2534
1285 if (ev_is_active (&pipeev)) 2535 if (ev_is_active (&pipe_w))
1286 { 2536 {
1287 /* this "locks" the handlers against writing to the pipe */ 2537 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1288 /* while we modify the fd vars */
1289 gotsig = 1;
1290#if EV_ASYNC_ENABLE
1291 gotasync = 1;
1292#endif
1293 2538
1294 ev_ref (EV_A); 2539 ev_ref (EV_A);
1295 ev_io_stop (EV_A_ &pipeev); 2540 ev_io_stop (EV_A_ &pipe_w);
1296 2541
1297#if EV_USE_EVENTFD 2542#if EV_USE_EVENTFD
1298 if (evfd >= 0) 2543 if (evfd >= 0)
1299 close (evfd); 2544 close (evfd);
1300#endif 2545#endif
1301 2546
1302 if (evpipe [0] >= 0) 2547 if (evpipe [0] >= 0)
1303 { 2548 {
1304 close (evpipe [0]); 2549 EV_WIN32_CLOSE_FD (evpipe [0]);
1305 close (evpipe [1]); 2550 EV_WIN32_CLOSE_FD (evpipe [1]);
1306 } 2551 }
1307 2552
2553#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1308 evpipe_init (EV_A); 2554 evpipe_init (EV_A);
1309 /* now iterate over everything, in case we missed something */ 2555 /* iterate over everything, in case we missed something before */
1310 pipecb (EV_A_ &pipeev, EV_READ); 2556 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2557#endif
1311 } 2558 }
1312 2559
1313 postfork = 0; 2560 postfork = 0;
1314} 2561}
1315 2562
1316#if EV_MULTIPLICITY 2563#if EV_MULTIPLICITY
2564
1317struct ev_loop * 2565struct ev_loop * ecb_cold
1318ev_loop_new (unsigned int flags) 2566ev_loop_new (unsigned int flags) EV_THROW
1319{ 2567{
1320 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2568 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1321 2569
1322 memset (loop, 0, sizeof (struct ev_loop)); 2570 memset (EV_A, 0, sizeof (struct ev_loop));
1323
1324 loop_init (EV_A_ flags); 2571 loop_init (EV_A_ flags);
1325 2572
1326 if (ev_backend (EV_A)) 2573 if (ev_backend (EV_A))
1327 return loop; 2574 return EV_A;
1328 2575
2576 ev_free (EV_A);
1329 return 0; 2577 return 0;
1330} 2578}
1331 2579
1332void 2580#endif /* multiplicity */
1333ev_loop_destroy (EV_P)
1334{
1335 loop_destroy (EV_A);
1336 ev_free (loop);
1337}
1338 2581
1339void 2582#if EV_VERIFY
1340ev_loop_fork (EV_P) 2583static void noinline ecb_cold
2584verify_watcher (EV_P_ W w)
1341{ 2585{
1342 postfork = 1; /* must be in line with ev_default_fork */ 2586 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1343}
1344 2587
2588 if (w->pending)
2589 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2590}
2591
2592static void noinline ecb_cold
2593verify_heap (EV_P_ ANHE *heap, int N)
2594{
2595 int i;
2596
2597 for (i = HEAP0; i < N + HEAP0; ++i)
2598 {
2599 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2600 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2601 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2602
2603 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2604 }
2605}
2606
2607static void noinline ecb_cold
2608array_verify (EV_P_ W *ws, int cnt)
2609{
2610 while (cnt--)
2611 {
2612 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2613 verify_watcher (EV_A_ ws [cnt]);
2614 }
2615}
2616#endif
2617
2618#if EV_FEATURE_API
2619void ecb_cold
2620ev_verify (EV_P) EV_THROW
2621{
2622#if EV_VERIFY
2623 int i;
2624 WL w, w2;
2625
2626 assert (activecnt >= -1);
2627
2628 assert (fdchangemax >= fdchangecnt);
2629 for (i = 0; i < fdchangecnt; ++i)
2630 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2631
2632 assert (anfdmax >= 0);
2633 for (i = 0; i < anfdmax; ++i)
2634 {
2635 int j = 0;
2636
2637 for (w = w2 = anfds [i].head; w; w = w->next)
2638 {
2639 verify_watcher (EV_A_ (W)w);
2640
2641 if (j++ & 1)
2642 {
2643 assert (("libev: io watcher list contains a loop", w != w2));
2644 w2 = w2->next;
2645 }
2646
2647 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2648 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2649 }
2650 }
2651
2652 assert (timermax >= timercnt);
2653 verify_heap (EV_A_ timers, timercnt);
2654
2655#if EV_PERIODIC_ENABLE
2656 assert (periodicmax >= periodiccnt);
2657 verify_heap (EV_A_ periodics, periodiccnt);
2658#endif
2659
2660 for (i = NUMPRI; i--; )
2661 {
2662 assert (pendingmax [i] >= pendingcnt [i]);
2663#if EV_IDLE_ENABLE
2664 assert (idleall >= 0);
2665 assert (idlemax [i] >= idlecnt [i]);
2666 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2667#endif
2668 }
2669
2670#if EV_FORK_ENABLE
2671 assert (forkmax >= forkcnt);
2672 array_verify (EV_A_ (W *)forks, forkcnt);
2673#endif
2674
2675#if EV_CLEANUP_ENABLE
2676 assert (cleanupmax >= cleanupcnt);
2677 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2678#endif
2679
2680#if EV_ASYNC_ENABLE
2681 assert (asyncmax >= asynccnt);
2682 array_verify (EV_A_ (W *)asyncs, asynccnt);
2683#endif
2684
2685#if EV_PREPARE_ENABLE
2686 assert (preparemax >= preparecnt);
2687 array_verify (EV_A_ (W *)prepares, preparecnt);
2688#endif
2689
2690#if EV_CHECK_ENABLE
2691 assert (checkmax >= checkcnt);
2692 array_verify (EV_A_ (W *)checks, checkcnt);
2693#endif
2694
2695# if 0
2696#if EV_CHILD_ENABLE
2697 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2698 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2699#endif
2700# endif
2701#endif
2702}
1345#endif 2703#endif
1346 2704
1347#if EV_MULTIPLICITY 2705#if EV_MULTIPLICITY
1348struct ev_loop * 2706struct ev_loop * ecb_cold
1349ev_default_loop_init (unsigned int flags)
1350#else 2707#else
1351int 2708int
2709#endif
1352ev_default_loop (unsigned int flags) 2710ev_default_loop (unsigned int flags) EV_THROW
1353#endif
1354{ 2711{
1355 if (!ev_default_loop_ptr) 2712 if (!ev_default_loop_ptr)
1356 { 2713 {
1357#if EV_MULTIPLICITY 2714#if EV_MULTIPLICITY
1358 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2715 EV_P = ev_default_loop_ptr = &default_loop_struct;
1359#else 2716#else
1360 ev_default_loop_ptr = 1; 2717 ev_default_loop_ptr = 1;
1361#endif 2718#endif
1362 2719
1363 loop_init (EV_A_ flags); 2720 loop_init (EV_A_ flags);
1364 2721
1365 if (ev_backend (EV_A)) 2722 if (ev_backend (EV_A))
1366 { 2723 {
1367#ifndef _WIN32 2724#if EV_CHILD_ENABLE
1368 ev_signal_init (&childev, childcb, SIGCHLD); 2725 ev_signal_init (&childev, childcb, SIGCHLD);
1369 ev_set_priority (&childev, EV_MAXPRI); 2726 ev_set_priority (&childev, EV_MAXPRI);
1370 ev_signal_start (EV_A_ &childev); 2727 ev_signal_start (EV_A_ &childev);
1371 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2728 ev_unref (EV_A); /* child watcher should not keep loop alive */
1372#endif 2729#endif
… …
1377 2734
1378 return ev_default_loop_ptr; 2735 return ev_default_loop_ptr;
1379} 2736}
1380 2737
1381void 2738void
1382ev_default_destroy (void) 2739ev_loop_fork (EV_P) EV_THROW
1383{ 2740{
1384#if EV_MULTIPLICITY 2741 postfork = 1;
1385 struct ev_loop *loop = ev_default_loop_ptr;
1386#endif
1387
1388#ifndef _WIN32
1389 ev_ref (EV_A); /* child watcher */
1390 ev_signal_stop (EV_A_ &childev);
1391#endif
1392
1393 loop_destroy (EV_A);
1394}
1395
1396void
1397ev_default_fork (void)
1398{
1399#if EV_MULTIPLICITY
1400 struct ev_loop *loop = ev_default_loop_ptr;
1401#endif
1402
1403 if (backend)
1404 postfork = 1; /* must be in line with ev_loop_fork */
1405} 2742}
1406 2743
1407/*****************************************************************************/ 2744/*****************************************************************************/
1408 2745
1409void 2746void
1410ev_invoke (EV_P_ void *w, int revents) 2747ev_invoke (EV_P_ void *w, int revents)
1411{ 2748{
1412 EV_CB_INVOKE ((W)w, revents); 2749 EV_CB_INVOKE ((W)w, revents);
1413} 2750}
1414 2751
1415void inline_speed 2752unsigned int
1416call_pending (EV_P) 2753ev_pending_count (EV_P) EV_THROW
1417{ 2754{
1418 int pri; 2755 int pri;
2756 unsigned int count = 0;
1419 2757
1420 for (pri = NUMPRI; pri--; ) 2758 for (pri = NUMPRI; pri--; )
2759 count += pendingcnt [pri];
2760
2761 return count;
2762}
2763
2764void noinline
2765ev_invoke_pending (EV_P)
2766{
2767 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
1421 while (pendingcnt [pri]) 2768 while (pendingcnt [pendingpri])
1422 { 2769 {
1423 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2770 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1424 2771
1425 if (expect_true (p->w))
1426 {
1427 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1428
1429 p->w->pending = 0; 2772 p->w->pending = 0;
1430 EV_CB_INVOKE (p->w, p->events); 2773 EV_CB_INVOKE (p->w, p->events);
1431 } 2774 EV_FREQUENT_CHECK;
1432 } 2775 }
1433} 2776}
1434 2777
1435void inline_size
1436timers_reify (EV_P)
1437{
1438 while (timercnt && ((WT)timers [0])->at <= mn_now)
1439 {
1440 ev_timer *w = (ev_timer *)timers [0];
1441
1442 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1443
1444 /* first reschedule or stop timer */
1445 if (w->repeat)
1446 {
1447 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1448
1449 ((WT)w)->at += w->repeat;
1450 if (((WT)w)->at < mn_now)
1451 ((WT)w)->at = mn_now;
1452
1453 downheap (timers, timercnt, 0);
1454 }
1455 else
1456 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1457
1458 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1459 }
1460}
1461
1462#if EV_PERIODIC_ENABLE
1463void inline_size
1464periodics_reify (EV_P)
1465{
1466 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1467 {
1468 ev_periodic *w = (ev_periodic *)periodics [0];
1469
1470 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1471
1472 /* first reschedule or stop timer */
1473 if (w->reschedule_cb)
1474 {
1475 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1476 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1477 downheap (periodics, periodiccnt, 0);
1478 }
1479 else if (w->interval)
1480 {
1481 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1482 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1483 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1484 downheap (periodics, periodiccnt, 0);
1485 }
1486 else
1487 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1488
1489 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1490 }
1491}
1492
1493static void noinline
1494periodics_reschedule (EV_P)
1495{
1496 int i;
1497
1498 /* adjust periodics after time jump */
1499 for (i = 0; i < periodiccnt; ++i)
1500 {
1501 ev_periodic *w = (ev_periodic *)periodics [i];
1502
1503 if (w->reschedule_cb)
1504 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1505 else if (w->interval)
1506 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1507 }
1508
1509 /* now rebuild the heap */
1510 for (i = periodiccnt >> 1; i--; )
1511 downheap (periodics, periodiccnt, i);
1512}
1513#endif
1514
1515#if EV_IDLE_ENABLE 2778#if EV_IDLE_ENABLE
1516void inline_size 2779/* make idle watchers pending. this handles the "call-idle */
2780/* only when higher priorities are idle" logic */
2781inline_size void
1517idle_reify (EV_P) 2782idle_reify (EV_P)
1518{ 2783{
1519 if (expect_false (idleall)) 2784 if (expect_false (idleall))
1520 { 2785 {
1521 int pri; 2786 int pri;
… …
1533 } 2798 }
1534 } 2799 }
1535} 2800}
1536#endif 2801#endif
1537 2802
1538void inline_speed 2803/* make timers pending */
2804inline_size void
2805timers_reify (EV_P)
2806{
2807 EV_FREQUENT_CHECK;
2808
2809 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2810 {
2811 do
2812 {
2813 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2814
2815 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2816
2817 /* first reschedule or stop timer */
2818 if (w->repeat)
2819 {
2820 ev_at (w) += w->repeat;
2821 if (ev_at (w) < mn_now)
2822 ev_at (w) = mn_now;
2823
2824 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2825
2826 ANHE_at_cache (timers [HEAP0]);
2827 downheap (timers, timercnt, HEAP0);
2828 }
2829 else
2830 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2831
2832 EV_FREQUENT_CHECK;
2833 feed_reverse (EV_A_ (W)w);
2834 }
2835 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2836
2837 feed_reverse_done (EV_A_ EV_TIMER);
2838 }
2839}
2840
2841#if EV_PERIODIC_ENABLE
2842
2843static void noinline
2844periodic_recalc (EV_P_ ev_periodic *w)
2845{
2846 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2847 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2848
2849 /* the above almost always errs on the low side */
2850 while (at <= ev_rt_now)
2851 {
2852 ev_tstamp nat = at + w->interval;
2853
2854 /* when resolution fails us, we use ev_rt_now */
2855 if (expect_false (nat == at))
2856 {
2857 at = ev_rt_now;
2858 break;
2859 }
2860
2861 at = nat;
2862 }
2863
2864 ev_at (w) = at;
2865}
2866
2867/* make periodics pending */
2868inline_size void
2869periodics_reify (EV_P)
2870{
2871 EV_FREQUENT_CHECK;
2872
2873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2874 {
2875 do
2876 {
2877 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2878
2879 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2880
2881 /* first reschedule or stop timer */
2882 if (w->reschedule_cb)
2883 {
2884 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2885
2886 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2887
2888 ANHE_at_cache (periodics [HEAP0]);
2889 downheap (periodics, periodiccnt, HEAP0);
2890 }
2891 else if (w->interval)
2892 {
2893 periodic_recalc (EV_A_ w);
2894 ANHE_at_cache (periodics [HEAP0]);
2895 downheap (periodics, periodiccnt, HEAP0);
2896 }
2897 else
2898 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2899
2900 EV_FREQUENT_CHECK;
2901 feed_reverse (EV_A_ (W)w);
2902 }
2903 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2904
2905 feed_reverse_done (EV_A_ EV_PERIODIC);
2906 }
2907}
2908
2909/* simply recalculate all periodics */
2910/* TODO: maybe ensure that at least one event happens when jumping forward? */
2911static void noinline ecb_cold
2912periodics_reschedule (EV_P)
2913{
2914 int i;
2915
2916 /* adjust periodics after time jump */
2917 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2918 {
2919 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2920
2921 if (w->reschedule_cb)
2922 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2923 else if (w->interval)
2924 periodic_recalc (EV_A_ w);
2925
2926 ANHE_at_cache (periodics [i]);
2927 }
2928
2929 reheap (periodics, periodiccnt);
2930}
2931#endif
2932
2933/* adjust all timers by a given offset */
2934static void noinline ecb_cold
2935timers_reschedule (EV_P_ ev_tstamp adjust)
2936{
2937 int i;
2938
2939 for (i = 0; i < timercnt; ++i)
2940 {
2941 ANHE *he = timers + i + HEAP0;
2942 ANHE_w (*he)->at += adjust;
2943 ANHE_at_cache (*he);
2944 }
2945}
2946
2947/* fetch new monotonic and realtime times from the kernel */
2948/* also detect if there was a timejump, and act accordingly */
2949inline_speed void
1539time_update (EV_P_ ev_tstamp max_block) 2950time_update (EV_P_ ev_tstamp max_block)
1540{ 2951{
1541 int i;
1542
1543#if EV_USE_MONOTONIC 2952#if EV_USE_MONOTONIC
1544 if (expect_true (have_monotonic)) 2953 if (expect_true (have_monotonic))
1545 { 2954 {
2955 int i;
1546 ev_tstamp odiff = rtmn_diff; 2956 ev_tstamp odiff = rtmn_diff;
1547 2957
1548 mn_now = get_clock (); 2958 mn_now = get_clock ();
1549 2959
1550 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2960 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1566 * doesn't hurt either as we only do this on time-jumps or 2976 * doesn't hurt either as we only do this on time-jumps or
1567 * in the unlikely event of having been preempted here. 2977 * in the unlikely event of having been preempted here.
1568 */ 2978 */
1569 for (i = 4; --i; ) 2979 for (i = 4; --i; )
1570 { 2980 {
2981 ev_tstamp diff;
1571 rtmn_diff = ev_rt_now - mn_now; 2982 rtmn_diff = ev_rt_now - mn_now;
1572 2983
1573 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2984 diff = odiff - rtmn_diff;
2985
2986 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1574 return; /* all is well */ 2987 return; /* all is well */
1575 2988
1576 ev_rt_now = ev_time (); 2989 ev_rt_now = ev_time ();
1577 mn_now = get_clock (); 2990 mn_now = get_clock ();
1578 now_floor = mn_now; 2991 now_floor = mn_now;
1579 } 2992 }
1580 2993
2994 /* no timer adjustment, as the monotonic clock doesn't jump */
2995 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1581# if EV_PERIODIC_ENABLE 2996# if EV_PERIODIC_ENABLE
1582 periodics_reschedule (EV_A); 2997 periodics_reschedule (EV_A);
1583# endif 2998# endif
1584 /* no timer adjustment, as the monotonic clock doesn't jump */
1585 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1586 } 2999 }
1587 else 3000 else
1588#endif 3001#endif
1589 { 3002 {
1590 ev_rt_now = ev_time (); 3003 ev_rt_now = ev_time ();
1591 3004
1592 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3005 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1593 { 3006 {
3007 /* adjust timers. this is easy, as the offset is the same for all of them */
3008 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1594#if EV_PERIODIC_ENABLE 3009#if EV_PERIODIC_ENABLE
1595 periodics_reschedule (EV_A); 3010 periodics_reschedule (EV_A);
1596#endif 3011#endif
1597 /* adjust timers. this is easy, as the offset is the same for all of them */
1598 for (i = 0; i < timercnt; ++i)
1599 ((WT)timers [i])->at += ev_rt_now - mn_now;
1600 } 3012 }
1601 3013
1602 mn_now = ev_rt_now; 3014 mn_now = ev_rt_now;
1603 } 3015 }
1604} 3016}
1605 3017
1606void 3018int
1607ev_ref (EV_P)
1608{
1609 ++activecnt;
1610}
1611
1612void
1613ev_unref (EV_P)
1614{
1615 --activecnt;
1616}
1617
1618static int loop_done;
1619
1620void
1621ev_loop (EV_P_ int flags) 3019ev_run (EV_P_ int flags)
1622{ 3020{
3021#if EV_FEATURE_API
3022 ++loop_depth;
3023#endif
3024
3025 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3026
1623 loop_done = EVUNLOOP_CANCEL; 3027 loop_done = EVBREAK_CANCEL;
1624 3028
1625 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3029 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1626 3030
1627 do 3031 do
1628 { 3032 {
3033#if EV_VERIFY >= 2
3034 ev_verify (EV_A);
3035#endif
3036
1629#ifndef _WIN32 3037#ifndef _WIN32
1630 if (expect_false (curpid)) /* penalise the forking check even more */ 3038 if (expect_false (curpid)) /* penalise the forking check even more */
1631 if (expect_false (getpid () != curpid)) 3039 if (expect_false (getpid () != curpid))
1632 { 3040 {
1633 curpid = getpid (); 3041 curpid = getpid ();
… …
1639 /* we might have forked, so queue fork handlers */ 3047 /* we might have forked, so queue fork handlers */
1640 if (expect_false (postfork)) 3048 if (expect_false (postfork))
1641 if (forkcnt) 3049 if (forkcnt)
1642 { 3050 {
1643 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3051 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1644 call_pending (EV_A); 3052 EV_INVOKE_PENDING;
1645 } 3053 }
1646#endif 3054#endif
1647 3055
3056#if EV_PREPARE_ENABLE
1648 /* queue prepare watchers (and execute them) */ 3057 /* queue prepare watchers (and execute them) */
1649 if (expect_false (preparecnt)) 3058 if (expect_false (preparecnt))
1650 { 3059 {
1651 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3060 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1652 call_pending (EV_A); 3061 EV_INVOKE_PENDING;
1653 } 3062 }
3063#endif
1654 3064
1655 if (expect_false (!activecnt)) 3065 if (expect_false (loop_done))
1656 break; 3066 break;
1657 3067
1658 /* we might have forked, so reify kernel state if necessary */ 3068 /* we might have forked, so reify kernel state if necessary */
1659 if (expect_false (postfork)) 3069 if (expect_false (postfork))
1660 loop_fork (EV_A); 3070 loop_fork (EV_A);
… …
1665 /* calculate blocking time */ 3075 /* calculate blocking time */
1666 { 3076 {
1667 ev_tstamp waittime = 0.; 3077 ev_tstamp waittime = 0.;
1668 ev_tstamp sleeptime = 0.; 3078 ev_tstamp sleeptime = 0.;
1669 3079
3080 /* remember old timestamp for io_blocktime calculation */
3081 ev_tstamp prev_mn_now = mn_now;
3082
3083 /* update time to cancel out callback processing overhead */
3084 time_update (EV_A_ 1e100);
3085
3086 /* from now on, we want a pipe-wake-up */
3087 pipe_write_wanted = 1;
3088
3089 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3090
1670 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3091 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1671 { 3092 {
1672 /* update time to cancel out callback processing overhead */
1673 time_update (EV_A_ 1e100);
1674
1675 waittime = MAX_BLOCKTIME; 3093 waittime = MAX_BLOCKTIME;
1676 3094
1677 if (timercnt) 3095 if (timercnt)
1678 { 3096 {
1679 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3097 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1680 if (waittime > to) waittime = to; 3098 if (waittime > to) waittime = to;
1681 } 3099 }
1682 3100
1683#if EV_PERIODIC_ENABLE 3101#if EV_PERIODIC_ENABLE
1684 if (periodiccnt) 3102 if (periodiccnt)
1685 { 3103 {
1686 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3104 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1687 if (waittime > to) waittime = to; 3105 if (waittime > to) waittime = to;
1688 } 3106 }
1689#endif 3107#endif
1690 3108
3109 /* don't let timeouts decrease the waittime below timeout_blocktime */
1691 if (expect_false (waittime < timeout_blocktime)) 3110 if (expect_false (waittime < timeout_blocktime))
1692 waittime = timeout_blocktime; 3111 waittime = timeout_blocktime;
1693 3112
1694 sleeptime = waittime - backend_fudge; 3113 /* at this point, we NEED to wait, so we have to ensure */
3114 /* to pass a minimum nonzero value to the backend */
3115 if (expect_false (waittime < backend_mintime))
3116 waittime = backend_mintime;
1695 3117
3118 /* extra check because io_blocktime is commonly 0 */
1696 if (expect_true (sleeptime > io_blocktime)) 3119 if (expect_false (io_blocktime))
1697 sleeptime = io_blocktime;
1698
1699 if (sleeptime)
1700 { 3120 {
3121 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3122
3123 if (sleeptime > waittime - backend_mintime)
3124 sleeptime = waittime - backend_mintime;
3125
3126 if (expect_true (sleeptime > 0.))
3127 {
1701 ev_sleep (sleeptime); 3128 ev_sleep (sleeptime);
1702 waittime -= sleeptime; 3129 waittime -= sleeptime;
3130 }
1703 } 3131 }
1704 } 3132 }
1705 3133
3134#if EV_FEATURE_API
1706 ++loop_count; 3135 ++loop_count;
3136#endif
3137 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1707 backend_poll (EV_A_ waittime); 3138 backend_poll (EV_A_ waittime);
3139 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3140
3141 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3142
3143 ECB_MEMORY_FENCE_ACQUIRE;
3144 if (pipe_write_skipped)
3145 {
3146 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3147 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3148 }
3149
1708 3150
1709 /* update ev_rt_now, do magic */ 3151 /* update ev_rt_now, do magic */
1710 time_update (EV_A_ waittime + sleeptime); 3152 time_update (EV_A_ waittime + sleeptime);
1711 } 3153 }
1712 3154
… …
1719#if EV_IDLE_ENABLE 3161#if EV_IDLE_ENABLE
1720 /* queue idle watchers unless other events are pending */ 3162 /* queue idle watchers unless other events are pending */
1721 idle_reify (EV_A); 3163 idle_reify (EV_A);
1722#endif 3164#endif
1723 3165
3166#if EV_CHECK_ENABLE
1724 /* queue check watchers, to be executed first */ 3167 /* queue check watchers, to be executed first */
1725 if (expect_false (checkcnt)) 3168 if (expect_false (checkcnt))
1726 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3169 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3170#endif
1727 3171
1728 call_pending (EV_A); 3172 EV_INVOKE_PENDING;
1729 } 3173 }
1730 while (expect_true ( 3174 while (expect_true (
1731 activecnt 3175 activecnt
1732 && !loop_done 3176 && !loop_done
1733 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3177 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1734 )); 3178 ));
1735 3179
1736 if (loop_done == EVUNLOOP_ONE) 3180 if (loop_done == EVBREAK_ONE)
1737 loop_done = EVUNLOOP_CANCEL; 3181 loop_done = EVBREAK_CANCEL;
3182
3183 /* pendingpri is normally -1 here, which is not a good */
3184 /* value when returning to an ev_invoke_pending */
3185 pendingpri = NUMPRI - 1;
3186
3187#if EV_FEATURE_API
3188 --loop_depth;
3189#endif
3190
3191 return activecnt;
1738} 3192}
1739 3193
1740void 3194void
1741ev_unloop (EV_P_ int how) 3195ev_break (EV_P_ int how) EV_THROW
1742{ 3196{
1743 loop_done = how; 3197 loop_done = how;
1744} 3198}
1745 3199
3200void
3201ev_ref (EV_P) EV_THROW
3202{
3203 ++activecnt;
3204}
3205
3206void
3207ev_unref (EV_P) EV_THROW
3208{
3209 --activecnt;
3210}
3211
3212void
3213ev_now_update (EV_P) EV_THROW
3214{
3215 time_update (EV_A_ 1e100);
3216}
3217
3218void
3219ev_suspend (EV_P) EV_THROW
3220{
3221 ev_now_update (EV_A);
3222}
3223
3224void
3225ev_resume (EV_P) EV_THROW
3226{
3227 ev_tstamp mn_prev = mn_now;
3228
3229 ev_now_update (EV_A);
3230 timers_reschedule (EV_A_ mn_now - mn_prev);
3231#if EV_PERIODIC_ENABLE
3232 /* TODO: really do this? */
3233 periodics_reschedule (EV_A);
3234#endif
3235}
3236
1746/*****************************************************************************/ 3237/*****************************************************************************/
3238/* singly-linked list management, used when the expected list length is short */
1747 3239
1748void inline_size 3240inline_size void
1749wlist_add (WL *head, WL elem) 3241wlist_add (WL *head, WL elem)
1750{ 3242{
1751 elem->next = *head; 3243 elem->next = *head;
1752 *head = elem; 3244 *head = elem;
1753} 3245}
1754 3246
1755void inline_size 3247inline_size void
1756wlist_del (WL *head, WL elem) 3248wlist_del (WL *head, WL elem)
1757{ 3249{
1758 while (*head) 3250 while (*head)
1759 { 3251 {
1760 if (*head == elem) 3252 if (expect_true (*head == elem))
1761 { 3253 {
1762 *head = elem->next; 3254 *head = elem->next;
1763 return; 3255 break;
1764 } 3256 }
1765 3257
1766 head = &(*head)->next; 3258 head = &(*head)->next;
1767 } 3259 }
1768} 3260}
1769 3261
1770void inline_speed 3262/* internal, faster, version of ev_clear_pending */
3263inline_speed void
1771clear_pending (EV_P_ W w) 3264clear_pending (EV_P_ W w)
1772{ 3265{
1773 if (w->pending) 3266 if (w->pending)
1774 { 3267 {
1775 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3268 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1776 w->pending = 0; 3269 w->pending = 0;
1777 } 3270 }
1778} 3271}
1779 3272
1780int 3273int
1781ev_clear_pending (EV_P_ void *w) 3274ev_clear_pending (EV_P_ void *w) EV_THROW
1782{ 3275{
1783 W w_ = (W)w; 3276 W w_ = (W)w;
1784 int pending = w_->pending; 3277 int pending = w_->pending;
1785 3278
1786 if (expect_true (pending)) 3279 if (expect_true (pending))
1787 { 3280 {
1788 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3281 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3282 p->w = (W)&pending_w;
1789 w_->pending = 0; 3283 w_->pending = 0;
1790 p->w = 0;
1791 return p->events; 3284 return p->events;
1792 } 3285 }
1793 else 3286 else
1794 return 0; 3287 return 0;
1795} 3288}
1796 3289
1797void inline_size 3290inline_size void
1798pri_adjust (EV_P_ W w) 3291pri_adjust (EV_P_ W w)
1799{ 3292{
1800 int pri = w->priority; 3293 int pri = ev_priority (w);
1801 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3294 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1802 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3295 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1803 w->priority = pri; 3296 ev_set_priority (w, pri);
1804} 3297}
1805 3298
1806void inline_speed 3299inline_speed void
1807ev_start (EV_P_ W w, int active) 3300ev_start (EV_P_ W w, int active)
1808{ 3301{
1809 pri_adjust (EV_A_ w); 3302 pri_adjust (EV_A_ w);
1810 w->active = active; 3303 w->active = active;
1811 ev_ref (EV_A); 3304 ev_ref (EV_A);
1812} 3305}
1813 3306
1814void inline_size 3307inline_size void
1815ev_stop (EV_P_ W w) 3308ev_stop (EV_P_ W w)
1816{ 3309{
1817 ev_unref (EV_A); 3310 ev_unref (EV_A);
1818 w->active = 0; 3311 w->active = 0;
1819} 3312}
1820 3313
1821/*****************************************************************************/ 3314/*****************************************************************************/
1822 3315
1823void noinline 3316void noinline
1824ev_io_start (EV_P_ ev_io *w) 3317ev_io_start (EV_P_ ev_io *w) EV_THROW
1825{ 3318{
1826 int fd = w->fd; 3319 int fd = w->fd;
1827 3320
1828 if (expect_false (ev_is_active (w))) 3321 if (expect_false (ev_is_active (w)))
1829 return; 3322 return;
1830 3323
1831 assert (("ev_io_start called with negative fd", fd >= 0)); 3324 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3325 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3326
3327 EV_FREQUENT_CHECK;
1832 3328
1833 ev_start (EV_A_ (W)w, 1); 3329 ev_start (EV_A_ (W)w, 1);
1834 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3330 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1835 wlist_add (&anfds[fd].head, (WL)w); 3331 wlist_add (&anfds[fd].head, (WL)w);
1836 3332
3333 /* common bug, apparently */
3334 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3335
1837 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3336 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1838 w->events &= ~EV_IOFDSET; 3337 w->events &= ~EV__IOFDSET;
3338
3339 EV_FREQUENT_CHECK;
1839} 3340}
1840 3341
1841void noinline 3342void noinline
1842ev_io_stop (EV_P_ ev_io *w) 3343ev_io_stop (EV_P_ ev_io *w) EV_THROW
1843{ 3344{
1844 clear_pending (EV_A_ (W)w); 3345 clear_pending (EV_A_ (W)w);
1845 if (expect_false (!ev_is_active (w))) 3346 if (expect_false (!ev_is_active (w)))
1846 return; 3347 return;
1847 3348
1848 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3349 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3350
3351 EV_FREQUENT_CHECK;
1849 3352
1850 wlist_del (&anfds[w->fd].head, (WL)w); 3353 wlist_del (&anfds[w->fd].head, (WL)w);
1851 ev_stop (EV_A_ (W)w); 3354 ev_stop (EV_A_ (W)w);
1852 3355
1853 fd_change (EV_A_ w->fd, 1); 3356 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3357
3358 EV_FREQUENT_CHECK;
1854} 3359}
1855 3360
1856void noinline 3361void noinline
1857ev_timer_start (EV_P_ ev_timer *w) 3362ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1858{ 3363{
1859 if (expect_false (ev_is_active (w))) 3364 if (expect_false (ev_is_active (w)))
1860 return; 3365 return;
1861 3366
1862 ((WT)w)->at += mn_now; 3367 ev_at (w) += mn_now;
1863 3368
1864 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3369 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1865 3370
3371 EV_FREQUENT_CHECK;
3372
3373 ++timercnt;
1866 ev_start (EV_A_ (W)w, ++timercnt); 3374 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1867 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3375 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1868 timers [timercnt - 1] = (WT)w; 3376 ANHE_w (timers [ev_active (w)]) = (WT)w;
1869 upheap (timers, timercnt - 1); 3377 ANHE_at_cache (timers [ev_active (w)]);
3378 upheap (timers, ev_active (w));
1870 3379
3380 EV_FREQUENT_CHECK;
3381
1871 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3382 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1872} 3383}
1873 3384
1874void noinline 3385void noinline
1875ev_timer_stop (EV_P_ ev_timer *w) 3386ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1876{ 3387{
1877 clear_pending (EV_A_ (W)w); 3388 clear_pending (EV_A_ (W)w);
1878 if (expect_false (!ev_is_active (w))) 3389 if (expect_false (!ev_is_active (w)))
1879 return; 3390 return;
1880 3391
1881 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3392 EV_FREQUENT_CHECK;
1882 3393
1883 { 3394 {
1884 int active = ((W)w)->active; 3395 int active = ev_active (w);
1885 3396
3397 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3398
3399 --timercnt;
3400
1886 if (expect_true (--active < --timercnt)) 3401 if (expect_true (active < timercnt + HEAP0))
1887 { 3402 {
1888 timers [active] = timers [timercnt]; 3403 timers [active] = timers [timercnt + HEAP0];
1889 adjustheap (timers, timercnt, active); 3404 adjustheap (timers, timercnt, active);
1890 } 3405 }
1891 } 3406 }
1892 3407
1893 ((WT)w)->at -= mn_now; 3408 ev_at (w) -= mn_now;
1894 3409
1895 ev_stop (EV_A_ (W)w); 3410 ev_stop (EV_A_ (W)w);
3411
3412 EV_FREQUENT_CHECK;
1896} 3413}
1897 3414
1898void noinline 3415void noinline
1899ev_timer_again (EV_P_ ev_timer *w) 3416ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1900{ 3417{
3418 EV_FREQUENT_CHECK;
3419
3420 clear_pending (EV_A_ (W)w);
3421
1901 if (ev_is_active (w)) 3422 if (ev_is_active (w))
1902 { 3423 {
1903 if (w->repeat) 3424 if (w->repeat)
1904 { 3425 {
1905 ((WT)w)->at = mn_now + w->repeat; 3426 ev_at (w) = mn_now + w->repeat;
3427 ANHE_at_cache (timers [ev_active (w)]);
1906 adjustheap (timers, timercnt, ((W)w)->active - 1); 3428 adjustheap (timers, timercnt, ev_active (w));
1907 } 3429 }
1908 else 3430 else
1909 ev_timer_stop (EV_A_ w); 3431 ev_timer_stop (EV_A_ w);
1910 } 3432 }
1911 else if (w->repeat) 3433 else if (w->repeat)
1912 { 3434 {
1913 w->at = w->repeat; 3435 ev_at (w) = w->repeat;
1914 ev_timer_start (EV_A_ w); 3436 ev_timer_start (EV_A_ w);
1915 } 3437 }
3438
3439 EV_FREQUENT_CHECK;
3440}
3441
3442ev_tstamp
3443ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3444{
3445 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1916} 3446}
1917 3447
1918#if EV_PERIODIC_ENABLE 3448#if EV_PERIODIC_ENABLE
1919void noinline 3449void noinline
1920ev_periodic_start (EV_P_ ev_periodic *w) 3450ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1921{ 3451{
1922 if (expect_false (ev_is_active (w))) 3452 if (expect_false (ev_is_active (w)))
1923 return; 3453 return;
1924 3454
1925 if (w->reschedule_cb) 3455 if (w->reschedule_cb)
1926 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3456 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1927 else if (w->interval) 3457 else if (w->interval)
1928 { 3458 {
1929 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3459 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1930 /* this formula differs from the one in periodic_reify because we do not always round up */ 3460 periodic_recalc (EV_A_ w);
1931 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1932 } 3461 }
1933 else 3462 else
1934 ((WT)w)->at = w->offset; 3463 ev_at (w) = w->offset;
1935 3464
3465 EV_FREQUENT_CHECK;
3466
3467 ++periodiccnt;
1936 ev_start (EV_A_ (W)w, ++periodiccnt); 3468 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1937 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 3469 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1938 periodics [periodiccnt - 1] = (WT)w; 3470 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1939 upheap (periodics, periodiccnt - 1); 3471 ANHE_at_cache (periodics [ev_active (w)]);
3472 upheap (periodics, ev_active (w));
1940 3473
3474 EV_FREQUENT_CHECK;
3475
1941 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3476 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1942} 3477}
1943 3478
1944void noinline 3479void noinline
1945ev_periodic_stop (EV_P_ ev_periodic *w) 3480ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1946{ 3481{
1947 clear_pending (EV_A_ (W)w); 3482 clear_pending (EV_A_ (W)w);
1948 if (expect_false (!ev_is_active (w))) 3483 if (expect_false (!ev_is_active (w)))
1949 return; 3484 return;
1950 3485
1951 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3486 EV_FREQUENT_CHECK;
1952 3487
1953 { 3488 {
1954 int active = ((W)w)->active; 3489 int active = ev_active (w);
1955 3490
3491 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3492
3493 --periodiccnt;
3494
1956 if (expect_true (--active < --periodiccnt)) 3495 if (expect_true (active < periodiccnt + HEAP0))
1957 { 3496 {
1958 periodics [active] = periodics [periodiccnt]; 3497 periodics [active] = periodics [periodiccnt + HEAP0];
1959 adjustheap (periodics, periodiccnt, active); 3498 adjustheap (periodics, periodiccnt, active);
1960 } 3499 }
1961 } 3500 }
1962 3501
1963 ev_stop (EV_A_ (W)w); 3502 ev_stop (EV_A_ (W)w);
3503
3504 EV_FREQUENT_CHECK;
1964} 3505}
1965 3506
1966void noinline 3507void noinline
1967ev_periodic_again (EV_P_ ev_periodic *w) 3508ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1968{ 3509{
1969 /* TODO: use adjustheap and recalculation */ 3510 /* TODO: use adjustheap and recalculation */
1970 ev_periodic_stop (EV_A_ w); 3511 ev_periodic_stop (EV_A_ w);
1971 ev_periodic_start (EV_A_ w); 3512 ev_periodic_start (EV_A_ w);
1972} 3513}
… …
1974 3515
1975#ifndef SA_RESTART 3516#ifndef SA_RESTART
1976# define SA_RESTART 0 3517# define SA_RESTART 0
1977#endif 3518#endif
1978 3519
3520#if EV_SIGNAL_ENABLE
3521
1979void noinline 3522void noinline
1980ev_signal_start (EV_P_ ev_signal *w) 3523ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1981{ 3524{
1982#if EV_MULTIPLICITY
1983 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1984#endif
1985 if (expect_false (ev_is_active (w))) 3525 if (expect_false (ev_is_active (w)))
1986 return; 3526 return;
1987 3527
1988 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3528 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1989 3529
1990 evpipe_init (EV_A); 3530#if EV_MULTIPLICITY
3531 assert (("libev: a signal must not be attached to two different loops",
3532 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
1991 3533
3534 signals [w->signum - 1].loop = EV_A;
3535#endif
3536
3537 EV_FREQUENT_CHECK;
3538
3539#if EV_USE_SIGNALFD
3540 if (sigfd == -2)
1992 { 3541 {
1993#ifndef _WIN32 3542 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1994 sigset_t full, prev; 3543 if (sigfd < 0 && errno == EINVAL)
1995 sigfillset (&full); 3544 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1996 sigprocmask (SIG_SETMASK, &full, &prev);
1997#endif
1998 3545
1999 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3546 if (sigfd >= 0)
3547 {
3548 fd_intern (sigfd); /* doing it twice will not hurt */
2000 3549
2001#ifndef _WIN32 3550 sigemptyset (&sigfd_set);
2002 sigprocmask (SIG_SETMASK, &prev, 0); 3551
2003#endif 3552 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3553 ev_set_priority (&sigfd_w, EV_MAXPRI);
3554 ev_io_start (EV_A_ &sigfd_w);
3555 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3556 }
2004 } 3557 }
3558
3559 if (sigfd >= 0)
3560 {
3561 /* TODO: check .head */
3562 sigaddset (&sigfd_set, w->signum);
3563 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3564
3565 signalfd (sigfd, &sigfd_set, 0);
3566 }
3567#endif
2005 3568
2006 ev_start (EV_A_ (W)w, 1); 3569 ev_start (EV_A_ (W)w, 1);
2007 wlist_add (&signals [w->signum - 1].head, (WL)w); 3570 wlist_add (&signals [w->signum - 1].head, (WL)w);
2008 3571
2009 if (!((WL)w)->next) 3572 if (!((WL)w)->next)
3573# if EV_USE_SIGNALFD
3574 if (sigfd < 0) /*TODO*/
3575# endif
2010 { 3576 {
2011#if _WIN32 3577# ifdef _WIN32
3578 evpipe_init (EV_A);
3579
2012 signal (w->signum, ev_sighandler); 3580 signal (w->signum, ev_sighandler);
2013#else 3581# else
2014 struct sigaction sa; 3582 struct sigaction sa;
3583
3584 evpipe_init (EV_A);
3585
2015 sa.sa_handler = ev_sighandler; 3586 sa.sa_handler = ev_sighandler;
2016 sigfillset (&sa.sa_mask); 3587 sigfillset (&sa.sa_mask);
2017 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3588 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2018 sigaction (w->signum, &sa, 0); 3589 sigaction (w->signum, &sa, 0);
3590
3591 if (origflags & EVFLAG_NOSIGMASK)
3592 {
3593 sigemptyset (&sa.sa_mask);
3594 sigaddset (&sa.sa_mask, w->signum);
3595 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3596 }
2019#endif 3597#endif
2020 } 3598 }
3599
3600 EV_FREQUENT_CHECK;
2021} 3601}
2022 3602
2023void noinline 3603void noinline
2024ev_signal_stop (EV_P_ ev_signal *w) 3604ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2025{ 3605{
2026 clear_pending (EV_A_ (W)w); 3606 clear_pending (EV_A_ (W)w);
2027 if (expect_false (!ev_is_active (w))) 3607 if (expect_false (!ev_is_active (w)))
2028 return; 3608 return;
2029 3609
3610 EV_FREQUENT_CHECK;
3611
2030 wlist_del (&signals [w->signum - 1].head, (WL)w); 3612 wlist_del (&signals [w->signum - 1].head, (WL)w);
2031 ev_stop (EV_A_ (W)w); 3613 ev_stop (EV_A_ (W)w);
2032 3614
2033 if (!signals [w->signum - 1].head) 3615 if (!signals [w->signum - 1].head)
3616 {
3617#if EV_MULTIPLICITY
3618 signals [w->signum - 1].loop = 0; /* unattach from signal */
3619#endif
3620#if EV_USE_SIGNALFD
3621 if (sigfd >= 0)
3622 {
3623 sigset_t ss;
3624
3625 sigemptyset (&ss);
3626 sigaddset (&ss, w->signum);
3627 sigdelset (&sigfd_set, w->signum);
3628
3629 signalfd (sigfd, &sigfd_set, 0);
3630 sigprocmask (SIG_UNBLOCK, &ss, 0);
3631 }
3632 else
3633#endif
2034 signal (w->signum, SIG_DFL); 3634 signal (w->signum, SIG_DFL);
3635 }
3636
3637 EV_FREQUENT_CHECK;
2035} 3638}
3639
3640#endif
3641
3642#if EV_CHILD_ENABLE
2036 3643
2037void 3644void
2038ev_child_start (EV_P_ ev_child *w) 3645ev_child_start (EV_P_ ev_child *w) EV_THROW
2039{ 3646{
2040#if EV_MULTIPLICITY 3647#if EV_MULTIPLICITY
2041 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3648 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2042#endif 3649#endif
2043 if (expect_false (ev_is_active (w))) 3650 if (expect_false (ev_is_active (w)))
2044 return; 3651 return;
2045 3652
3653 EV_FREQUENT_CHECK;
3654
2046 ev_start (EV_A_ (W)w, 1); 3655 ev_start (EV_A_ (W)w, 1);
2047 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3656 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3657
3658 EV_FREQUENT_CHECK;
2048} 3659}
2049 3660
2050void 3661void
2051ev_child_stop (EV_P_ ev_child *w) 3662ev_child_stop (EV_P_ ev_child *w) EV_THROW
2052{ 3663{
2053 clear_pending (EV_A_ (W)w); 3664 clear_pending (EV_A_ (W)w);
2054 if (expect_false (!ev_is_active (w))) 3665 if (expect_false (!ev_is_active (w)))
2055 return; 3666 return;
2056 3667
3668 EV_FREQUENT_CHECK;
3669
2057 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3670 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2058 ev_stop (EV_A_ (W)w); 3671 ev_stop (EV_A_ (W)w);
3672
3673 EV_FREQUENT_CHECK;
2059} 3674}
3675
3676#endif
2060 3677
2061#if EV_STAT_ENABLE 3678#if EV_STAT_ENABLE
2062 3679
2063# ifdef _WIN32 3680# ifdef _WIN32
2064# undef lstat 3681# undef lstat
2065# define lstat(a,b) _stati64 (a,b) 3682# define lstat(a,b) _stati64 (a,b)
2066# endif 3683# endif
2067 3684
2068#define DEF_STAT_INTERVAL 5.0074891 3685#define DEF_STAT_INTERVAL 5.0074891
3686#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2069#define MIN_STAT_INTERVAL 0.1074891 3687#define MIN_STAT_INTERVAL 0.1074891
2070 3688
2071static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3689static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2072 3690
2073#if EV_USE_INOTIFY 3691#if EV_USE_INOTIFY
2074# define EV_INOTIFY_BUFSIZE 8192 3692
3693/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3694# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2075 3695
2076static void noinline 3696static void noinline
2077infy_add (EV_P_ ev_stat *w) 3697infy_add (EV_P_ ev_stat *w)
2078{ 3698{
2079 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); 3699 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);
2080 3700
2081 if (w->wd < 0) 3701 if (w->wd >= 0)
3702 {
3703 struct statfs sfs;
3704
3705 /* now local changes will be tracked by inotify, but remote changes won't */
3706 /* unless the filesystem is known to be local, we therefore still poll */
3707 /* also do poll on <2.6.25, but with normal frequency */
3708
3709 if (!fs_2625)
3710 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3711 else if (!statfs (w->path, &sfs)
3712 && (sfs.f_type == 0x1373 /* devfs */
3713 || sfs.f_type == 0xEF53 /* ext2/3 */
3714 || sfs.f_type == 0x3153464a /* jfs */
3715 || sfs.f_type == 0x52654973 /* reiser3 */
3716 || sfs.f_type == 0x01021994 /* tempfs */
3717 || sfs.f_type == 0x58465342 /* xfs */))
3718 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3719 else
3720 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2082 { 3721 }
2083 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3722 else
3723 {
3724 /* can't use inotify, continue to stat */
3725 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2084 3726
2085 /* monitor some parent directory for speedup hints */ 3727 /* if path is not there, monitor some parent directory for speedup hints */
3728 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3729 /* but an efficiency issue only */
2086 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3730 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2087 { 3731 {
2088 char path [4096]; 3732 char path [4096];
2089 strcpy (path, w->path); 3733 strcpy (path, w->path);
2090 3734
… …
2093 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3737 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2094 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3738 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2095 3739
2096 char *pend = strrchr (path, '/'); 3740 char *pend = strrchr (path, '/');
2097 3741
2098 if (!pend) 3742 if (!pend || pend == path)
2099 break; /* whoops, no '/', complain to your admin */ 3743 break;
2100 3744
2101 *pend = 0; 3745 *pend = 0;
2102 w->wd = inotify_add_watch (fs_fd, path, mask); 3746 w->wd = inotify_add_watch (fs_fd, path, mask);
2103 } 3747 }
2104 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3748 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2105 } 3749 }
2106 } 3750 }
2107 else
2108 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2109 3751
2110 if (w->wd >= 0) 3752 if (w->wd >= 0)
2111 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3753 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3754
3755 /* now re-arm timer, if required */
3756 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3757 ev_timer_again (EV_A_ &w->timer);
3758 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2112} 3759}
2113 3760
2114static void noinline 3761static void noinline
2115infy_del (EV_P_ ev_stat *w) 3762infy_del (EV_P_ ev_stat *w)
2116{ 3763{
… …
2119 3766
2120 if (wd < 0) 3767 if (wd < 0)
2121 return; 3768 return;
2122 3769
2123 w->wd = -2; 3770 w->wd = -2;
2124 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3771 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2125 wlist_del (&fs_hash [slot].head, (WL)w); 3772 wlist_del (&fs_hash [slot].head, (WL)w);
2126 3773
2127 /* remove this watcher, if others are watching it, they will rearm */ 3774 /* remove this watcher, if others are watching it, they will rearm */
2128 inotify_rm_watch (fs_fd, wd); 3775 inotify_rm_watch (fs_fd, wd);
2129} 3776}
2130 3777
2131static void noinline 3778static void noinline
2132infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3779infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2133{ 3780{
2134 if (slot < 0) 3781 if (slot < 0)
2135 /* overflow, need to check for all hahs slots */ 3782 /* overflow, need to check for all hash slots */
2136 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3783 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2137 infy_wd (EV_A_ slot, wd, ev); 3784 infy_wd (EV_A_ slot, wd, ev);
2138 else 3785 else
2139 { 3786 {
2140 WL w_; 3787 WL w_;
2141 3788
2142 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3789 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2143 { 3790 {
2144 ev_stat *w = (ev_stat *)w_; 3791 ev_stat *w = (ev_stat *)w_;
2145 w_ = w_->next; /* lets us remove this watcher and all before it */ 3792 w_ = w_->next; /* lets us remove this watcher and all before it */
2146 3793
2147 if (w->wd == wd || wd == -1) 3794 if (w->wd == wd || wd == -1)
2148 { 3795 {
2149 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3796 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2150 { 3797 {
3798 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2151 w->wd = -1; 3799 w->wd = -1;
2152 infy_add (EV_A_ w); /* re-add, no matter what */ 3800 infy_add (EV_A_ w); /* re-add, no matter what */
2153 } 3801 }
2154 3802
2155 stat_timer_cb (EV_A_ &w->timer, 0); 3803 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2160 3808
2161static void 3809static void
2162infy_cb (EV_P_ ev_io *w, int revents) 3810infy_cb (EV_P_ ev_io *w, int revents)
2163{ 3811{
2164 char buf [EV_INOTIFY_BUFSIZE]; 3812 char buf [EV_INOTIFY_BUFSIZE];
2165 struct inotify_event *ev = (struct inotify_event *)buf;
2166 int ofs; 3813 int ofs;
2167 int len = read (fs_fd, buf, sizeof (buf)); 3814 int len = read (fs_fd, buf, sizeof (buf));
2168 3815
2169 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3816 for (ofs = 0; ofs < len; )
3817 {
3818 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2170 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3819 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3820 ofs += sizeof (struct inotify_event) + ev->len;
3821 }
2171} 3822}
2172 3823
2173void inline_size 3824inline_size void ecb_cold
3825ev_check_2625 (EV_P)
3826{
3827 /* kernels < 2.6.25 are borked
3828 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3829 */
3830 if (ev_linux_version () < 0x020619)
3831 return;
3832
3833 fs_2625 = 1;
3834}
3835
3836inline_size int
3837infy_newfd (void)
3838{
3839#if defined IN_CLOEXEC && defined IN_NONBLOCK
3840 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3841 if (fd >= 0)
3842 return fd;
3843#endif
3844 return inotify_init ();
3845}
3846
3847inline_size void
2174infy_init (EV_P) 3848infy_init (EV_P)
2175{ 3849{
2176 if (fs_fd != -2) 3850 if (fs_fd != -2)
2177 return; 3851 return;
2178 3852
3853 fs_fd = -1;
3854
3855 ev_check_2625 (EV_A);
3856
2179 fs_fd = inotify_init (); 3857 fs_fd = infy_newfd ();
2180 3858
2181 if (fs_fd >= 0) 3859 if (fs_fd >= 0)
2182 { 3860 {
3861 fd_intern (fs_fd);
2183 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3862 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2184 ev_set_priority (&fs_w, EV_MAXPRI); 3863 ev_set_priority (&fs_w, EV_MAXPRI);
2185 ev_io_start (EV_A_ &fs_w); 3864 ev_io_start (EV_A_ &fs_w);
3865 ev_unref (EV_A);
2186 } 3866 }
2187} 3867}
2188 3868
2189void inline_size 3869inline_size void
2190infy_fork (EV_P) 3870infy_fork (EV_P)
2191{ 3871{
2192 int slot; 3872 int slot;
2193 3873
2194 if (fs_fd < 0) 3874 if (fs_fd < 0)
2195 return; 3875 return;
2196 3876
3877 ev_ref (EV_A);
3878 ev_io_stop (EV_A_ &fs_w);
2197 close (fs_fd); 3879 close (fs_fd);
2198 fs_fd = inotify_init (); 3880 fs_fd = infy_newfd ();
2199 3881
3882 if (fs_fd >= 0)
3883 {
3884 fd_intern (fs_fd);
3885 ev_io_set (&fs_w, fs_fd, EV_READ);
3886 ev_io_start (EV_A_ &fs_w);
3887 ev_unref (EV_A);
3888 }
3889
2200 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3890 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2201 { 3891 {
2202 WL w_ = fs_hash [slot].head; 3892 WL w_ = fs_hash [slot].head;
2203 fs_hash [slot].head = 0; 3893 fs_hash [slot].head = 0;
2204 3894
2205 while (w_) 3895 while (w_)
… …
2210 w->wd = -1; 3900 w->wd = -1;
2211 3901
2212 if (fs_fd >= 0) 3902 if (fs_fd >= 0)
2213 infy_add (EV_A_ w); /* re-add, no matter what */ 3903 infy_add (EV_A_ w); /* re-add, no matter what */
2214 else 3904 else
3905 {
3906 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3907 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2215 ev_timer_start (EV_A_ &w->timer); 3908 ev_timer_again (EV_A_ &w->timer);
3909 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3910 }
2216 } 3911 }
2217
2218 } 3912 }
2219} 3913}
2220 3914
3915#endif
3916
3917#ifdef _WIN32
3918# define EV_LSTAT(p,b) _stati64 (p, b)
3919#else
3920# define EV_LSTAT(p,b) lstat (p, b)
2221#endif 3921#endif
2222 3922
2223void 3923void
2224ev_stat_stat (EV_P_ ev_stat *w) 3924ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2225{ 3925{
2226 if (lstat (w->path, &w->attr) < 0) 3926 if (lstat (w->path, &w->attr) < 0)
2227 w->attr.st_nlink = 0; 3927 w->attr.st_nlink = 0;
2228 else if (!w->attr.st_nlink) 3928 else if (!w->attr.st_nlink)
2229 w->attr.st_nlink = 1; 3929 w->attr.st_nlink = 1;
… …
2232static void noinline 3932static void noinline
2233stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3933stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2234{ 3934{
2235 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3935 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2236 3936
2237 /* we copy this here each the time so that */ 3937 ev_statdata prev = w->attr;
2238 /* prev has the old value when the callback gets invoked */
2239 w->prev = w->attr;
2240 ev_stat_stat (EV_A_ w); 3938 ev_stat_stat (EV_A_ w);
2241 3939
2242 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3940 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2243 if ( 3941 if (
2244 w->prev.st_dev != w->attr.st_dev 3942 prev.st_dev != w->attr.st_dev
2245 || w->prev.st_ino != w->attr.st_ino 3943 || prev.st_ino != w->attr.st_ino
2246 || w->prev.st_mode != w->attr.st_mode 3944 || prev.st_mode != w->attr.st_mode
2247 || w->prev.st_nlink != w->attr.st_nlink 3945 || prev.st_nlink != w->attr.st_nlink
2248 || w->prev.st_uid != w->attr.st_uid 3946 || prev.st_uid != w->attr.st_uid
2249 || w->prev.st_gid != w->attr.st_gid 3947 || prev.st_gid != w->attr.st_gid
2250 || w->prev.st_rdev != w->attr.st_rdev 3948 || prev.st_rdev != w->attr.st_rdev
2251 || w->prev.st_size != w->attr.st_size 3949 || prev.st_size != w->attr.st_size
2252 || w->prev.st_atime != w->attr.st_atime 3950 || prev.st_atime != w->attr.st_atime
2253 || w->prev.st_mtime != w->attr.st_mtime 3951 || prev.st_mtime != w->attr.st_mtime
2254 || w->prev.st_ctime != w->attr.st_ctime 3952 || prev.st_ctime != w->attr.st_ctime
2255 ) { 3953 ) {
3954 /* we only update w->prev on actual differences */
3955 /* in case we test more often than invoke the callback, */
3956 /* to ensure that prev is always different to attr */
3957 w->prev = prev;
3958
2256 #if EV_USE_INOTIFY 3959 #if EV_USE_INOTIFY
3960 if (fs_fd >= 0)
3961 {
2257 infy_del (EV_A_ w); 3962 infy_del (EV_A_ w);
2258 infy_add (EV_A_ w); 3963 infy_add (EV_A_ w);
2259 ev_stat_stat (EV_A_ w); /* avoid race... */ 3964 ev_stat_stat (EV_A_ w); /* avoid race... */
3965 }
2260 #endif 3966 #endif
2261 3967
2262 ev_feed_event (EV_A_ w, EV_STAT); 3968 ev_feed_event (EV_A_ w, EV_STAT);
2263 } 3969 }
2264} 3970}
2265 3971
2266void 3972void
2267ev_stat_start (EV_P_ ev_stat *w) 3973ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2268{ 3974{
2269 if (expect_false (ev_is_active (w))) 3975 if (expect_false (ev_is_active (w)))
2270 return; 3976 return;
2271 3977
2272 /* since we use memcmp, we need to clear any padding data etc. */
2273 memset (&w->prev, 0, sizeof (ev_statdata));
2274 memset (&w->attr, 0, sizeof (ev_statdata));
2275
2276 ev_stat_stat (EV_A_ w); 3978 ev_stat_stat (EV_A_ w);
2277 3979
3980 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2278 if (w->interval < MIN_STAT_INTERVAL) 3981 w->interval = MIN_STAT_INTERVAL;
2279 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2280 3982
2281 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3983 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2282 ev_set_priority (&w->timer, ev_priority (w)); 3984 ev_set_priority (&w->timer, ev_priority (w));
2283 3985
2284#if EV_USE_INOTIFY 3986#if EV_USE_INOTIFY
2285 infy_init (EV_A); 3987 infy_init (EV_A);
2286 3988
2287 if (fs_fd >= 0) 3989 if (fs_fd >= 0)
2288 infy_add (EV_A_ w); 3990 infy_add (EV_A_ w);
2289 else 3991 else
2290#endif 3992#endif
3993 {
2291 ev_timer_start (EV_A_ &w->timer); 3994 ev_timer_again (EV_A_ &w->timer);
3995 ev_unref (EV_A);
3996 }
2292 3997
2293 ev_start (EV_A_ (W)w, 1); 3998 ev_start (EV_A_ (W)w, 1);
3999
4000 EV_FREQUENT_CHECK;
2294} 4001}
2295 4002
2296void 4003void
2297ev_stat_stop (EV_P_ ev_stat *w) 4004ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2298{ 4005{
2299 clear_pending (EV_A_ (W)w); 4006 clear_pending (EV_A_ (W)w);
2300 if (expect_false (!ev_is_active (w))) 4007 if (expect_false (!ev_is_active (w)))
2301 return; 4008 return;
2302 4009
4010 EV_FREQUENT_CHECK;
4011
2303#if EV_USE_INOTIFY 4012#if EV_USE_INOTIFY
2304 infy_del (EV_A_ w); 4013 infy_del (EV_A_ w);
2305#endif 4014#endif
4015
4016 if (ev_is_active (&w->timer))
4017 {
4018 ev_ref (EV_A);
2306 ev_timer_stop (EV_A_ &w->timer); 4019 ev_timer_stop (EV_A_ &w->timer);
4020 }
2307 4021
2308 ev_stop (EV_A_ (W)w); 4022 ev_stop (EV_A_ (W)w);
4023
4024 EV_FREQUENT_CHECK;
2309} 4025}
2310#endif 4026#endif
2311 4027
2312#if EV_IDLE_ENABLE 4028#if EV_IDLE_ENABLE
2313void 4029void
2314ev_idle_start (EV_P_ ev_idle *w) 4030ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2315{ 4031{
2316 if (expect_false (ev_is_active (w))) 4032 if (expect_false (ev_is_active (w)))
2317 return; 4033 return;
2318 4034
2319 pri_adjust (EV_A_ (W)w); 4035 pri_adjust (EV_A_ (W)w);
4036
4037 EV_FREQUENT_CHECK;
2320 4038
2321 { 4039 {
2322 int active = ++idlecnt [ABSPRI (w)]; 4040 int active = ++idlecnt [ABSPRI (w)];
2323 4041
2324 ++idleall; 4042 ++idleall;
2325 ev_start (EV_A_ (W)w, active); 4043 ev_start (EV_A_ (W)w, active);
2326 4044
2327 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4045 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2328 idles [ABSPRI (w)][active - 1] = w; 4046 idles [ABSPRI (w)][active - 1] = w;
2329 } 4047 }
4048
4049 EV_FREQUENT_CHECK;
2330} 4050}
2331 4051
2332void 4052void
2333ev_idle_stop (EV_P_ ev_idle *w) 4053ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2334{ 4054{
2335 clear_pending (EV_A_ (W)w); 4055 clear_pending (EV_A_ (W)w);
2336 if (expect_false (!ev_is_active (w))) 4056 if (expect_false (!ev_is_active (w)))
2337 return; 4057 return;
2338 4058
4059 EV_FREQUENT_CHECK;
4060
2339 { 4061 {
2340 int active = ((W)w)->active; 4062 int active = ev_active (w);
2341 4063
2342 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4064 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2343 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4065 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2344 4066
2345 ev_stop (EV_A_ (W)w); 4067 ev_stop (EV_A_ (W)w);
2346 --idleall; 4068 --idleall;
2347 } 4069 }
2348}
2349#endif
2350 4070
4071 EV_FREQUENT_CHECK;
4072}
4073#endif
4074
4075#if EV_PREPARE_ENABLE
2351void 4076void
2352ev_prepare_start (EV_P_ ev_prepare *w) 4077ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2353{ 4078{
2354 if (expect_false (ev_is_active (w))) 4079 if (expect_false (ev_is_active (w)))
2355 return; 4080 return;
4081
4082 EV_FREQUENT_CHECK;
2356 4083
2357 ev_start (EV_A_ (W)w, ++preparecnt); 4084 ev_start (EV_A_ (W)w, ++preparecnt);
2358 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4085 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2359 prepares [preparecnt - 1] = w; 4086 prepares [preparecnt - 1] = w;
4087
4088 EV_FREQUENT_CHECK;
2360} 4089}
2361 4090
2362void 4091void
2363ev_prepare_stop (EV_P_ ev_prepare *w) 4092ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2364{ 4093{
2365 clear_pending (EV_A_ (W)w); 4094 clear_pending (EV_A_ (W)w);
2366 if (expect_false (!ev_is_active (w))) 4095 if (expect_false (!ev_is_active (w)))
2367 return; 4096 return;
2368 4097
4098 EV_FREQUENT_CHECK;
4099
2369 { 4100 {
2370 int active = ((W)w)->active; 4101 int active = ev_active (w);
4102
2371 prepares [active - 1] = prepares [--preparecnt]; 4103 prepares [active - 1] = prepares [--preparecnt];
2372 ((W)prepares [active - 1])->active = active; 4104 ev_active (prepares [active - 1]) = active;
2373 } 4105 }
2374 4106
2375 ev_stop (EV_A_ (W)w); 4107 ev_stop (EV_A_ (W)w);
2376}
2377 4108
4109 EV_FREQUENT_CHECK;
4110}
4111#endif
4112
4113#if EV_CHECK_ENABLE
2378void 4114void
2379ev_check_start (EV_P_ ev_check *w) 4115ev_check_start (EV_P_ ev_check *w) EV_THROW
2380{ 4116{
2381 if (expect_false (ev_is_active (w))) 4117 if (expect_false (ev_is_active (w)))
2382 return; 4118 return;
4119
4120 EV_FREQUENT_CHECK;
2383 4121
2384 ev_start (EV_A_ (W)w, ++checkcnt); 4122 ev_start (EV_A_ (W)w, ++checkcnt);
2385 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4123 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2386 checks [checkcnt - 1] = w; 4124 checks [checkcnt - 1] = w;
4125
4126 EV_FREQUENT_CHECK;
2387} 4127}
2388 4128
2389void 4129void
2390ev_check_stop (EV_P_ ev_check *w) 4130ev_check_stop (EV_P_ ev_check *w) EV_THROW
2391{ 4131{
2392 clear_pending (EV_A_ (W)w); 4132 clear_pending (EV_A_ (W)w);
2393 if (expect_false (!ev_is_active (w))) 4133 if (expect_false (!ev_is_active (w)))
2394 return; 4134 return;
2395 4135
4136 EV_FREQUENT_CHECK;
4137
2396 { 4138 {
2397 int active = ((W)w)->active; 4139 int active = ev_active (w);
4140
2398 checks [active - 1] = checks [--checkcnt]; 4141 checks [active - 1] = checks [--checkcnt];
2399 ((W)checks [active - 1])->active = active; 4142 ev_active (checks [active - 1]) = active;
2400 } 4143 }
2401 4144
2402 ev_stop (EV_A_ (W)w); 4145 ev_stop (EV_A_ (W)w);
4146
4147 EV_FREQUENT_CHECK;
2403} 4148}
4149#endif
2404 4150
2405#if EV_EMBED_ENABLE 4151#if EV_EMBED_ENABLE
2406void noinline 4152void noinline
2407ev_embed_sweep (EV_P_ ev_embed *w) 4153ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2408{ 4154{
2409 ev_loop (w->other, EVLOOP_NONBLOCK); 4155 ev_run (w->other, EVRUN_NOWAIT);
2410} 4156}
2411 4157
2412static void 4158static void
2413embed_io_cb (EV_P_ ev_io *io, int revents) 4159embed_io_cb (EV_P_ ev_io *io, int revents)
2414{ 4160{
2415 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4161 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2416 4162
2417 if (ev_cb (w)) 4163 if (ev_cb (w))
2418 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4164 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2419 else 4165 else
2420 ev_loop (w->other, EVLOOP_NONBLOCK); 4166 ev_run (w->other, EVRUN_NOWAIT);
2421} 4167}
2422 4168
2423static void 4169static void
2424embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4170embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2425{ 4171{
2426 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4172 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2427 4173
2428 { 4174 {
2429 struct ev_loop *loop = w->other; 4175 EV_P = w->other;
2430 4176
2431 while (fdchangecnt) 4177 while (fdchangecnt)
2432 { 4178 {
2433 fd_reify (EV_A); 4179 fd_reify (EV_A);
2434 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4180 ev_run (EV_A_ EVRUN_NOWAIT);
2435 } 4181 }
2436 } 4182 }
4183}
4184
4185static void
4186embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4187{
4188 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4189
4190 ev_embed_stop (EV_A_ w);
4191
4192 {
4193 EV_P = w->other;
4194
4195 ev_loop_fork (EV_A);
4196 ev_run (EV_A_ EVRUN_NOWAIT);
4197 }
4198
4199 ev_embed_start (EV_A_ w);
2437} 4200}
2438 4201
2439#if 0 4202#if 0
2440static void 4203static void
2441embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4204embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2443 ev_idle_stop (EV_A_ idle); 4206 ev_idle_stop (EV_A_ idle);
2444} 4207}
2445#endif 4208#endif
2446 4209
2447void 4210void
2448ev_embed_start (EV_P_ ev_embed *w) 4211ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2449{ 4212{
2450 if (expect_false (ev_is_active (w))) 4213 if (expect_false (ev_is_active (w)))
2451 return; 4214 return;
2452 4215
2453 { 4216 {
2454 struct ev_loop *loop = w->other; 4217 EV_P = w->other;
2455 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4218 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2456 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4219 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2457 } 4220 }
4221
4222 EV_FREQUENT_CHECK;
2458 4223
2459 ev_set_priority (&w->io, ev_priority (w)); 4224 ev_set_priority (&w->io, ev_priority (w));
2460 ev_io_start (EV_A_ &w->io); 4225 ev_io_start (EV_A_ &w->io);
2461 4226
2462 ev_prepare_init (&w->prepare, embed_prepare_cb); 4227 ev_prepare_init (&w->prepare, embed_prepare_cb);
2463 ev_set_priority (&w->prepare, EV_MINPRI); 4228 ev_set_priority (&w->prepare, EV_MINPRI);
2464 ev_prepare_start (EV_A_ &w->prepare); 4229 ev_prepare_start (EV_A_ &w->prepare);
2465 4230
4231 ev_fork_init (&w->fork, embed_fork_cb);
4232 ev_fork_start (EV_A_ &w->fork);
4233
2466 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4234 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2467 4235
2468 ev_start (EV_A_ (W)w, 1); 4236 ev_start (EV_A_ (W)w, 1);
4237
4238 EV_FREQUENT_CHECK;
2469} 4239}
2470 4240
2471void 4241void
2472ev_embed_stop (EV_P_ ev_embed *w) 4242ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2473{ 4243{
2474 clear_pending (EV_A_ (W)w); 4244 clear_pending (EV_A_ (W)w);
2475 if (expect_false (!ev_is_active (w))) 4245 if (expect_false (!ev_is_active (w)))
2476 return; 4246 return;
2477 4247
4248 EV_FREQUENT_CHECK;
4249
2478 ev_io_stop (EV_A_ &w->io); 4250 ev_io_stop (EV_A_ &w->io);
2479 ev_prepare_stop (EV_A_ &w->prepare); 4251 ev_prepare_stop (EV_A_ &w->prepare);
4252 ev_fork_stop (EV_A_ &w->fork);
2480 4253
2481 ev_stop (EV_A_ (W)w); 4254 ev_stop (EV_A_ (W)w);
4255
4256 EV_FREQUENT_CHECK;
2482} 4257}
2483#endif 4258#endif
2484 4259
2485#if EV_FORK_ENABLE 4260#if EV_FORK_ENABLE
2486void 4261void
2487ev_fork_start (EV_P_ ev_fork *w) 4262ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2488{ 4263{
2489 if (expect_false (ev_is_active (w))) 4264 if (expect_false (ev_is_active (w)))
2490 return; 4265 return;
4266
4267 EV_FREQUENT_CHECK;
2491 4268
2492 ev_start (EV_A_ (W)w, ++forkcnt); 4269 ev_start (EV_A_ (W)w, ++forkcnt);
2493 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4270 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2494 forks [forkcnt - 1] = w; 4271 forks [forkcnt - 1] = w;
4272
4273 EV_FREQUENT_CHECK;
2495} 4274}
2496 4275
2497void 4276void
2498ev_fork_stop (EV_P_ ev_fork *w) 4277ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2499{ 4278{
2500 clear_pending (EV_A_ (W)w); 4279 clear_pending (EV_A_ (W)w);
2501 if (expect_false (!ev_is_active (w))) 4280 if (expect_false (!ev_is_active (w)))
2502 return; 4281 return;
2503 4282
4283 EV_FREQUENT_CHECK;
4284
2504 { 4285 {
2505 int active = ((W)w)->active; 4286 int active = ev_active (w);
4287
2506 forks [active - 1] = forks [--forkcnt]; 4288 forks [active - 1] = forks [--forkcnt];
2507 ((W)forks [active - 1])->active = active; 4289 ev_active (forks [active - 1]) = active;
2508 } 4290 }
2509 4291
2510 ev_stop (EV_A_ (W)w); 4292 ev_stop (EV_A_ (W)w);
4293
4294 EV_FREQUENT_CHECK;
4295}
4296#endif
4297
4298#if EV_CLEANUP_ENABLE
4299void
4300ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4301{
4302 if (expect_false (ev_is_active (w)))
4303 return;
4304
4305 EV_FREQUENT_CHECK;
4306
4307 ev_start (EV_A_ (W)w, ++cleanupcnt);
4308 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4309 cleanups [cleanupcnt - 1] = w;
4310
4311 /* cleanup watchers should never keep a refcount on the loop */
4312 ev_unref (EV_A);
4313 EV_FREQUENT_CHECK;
4314}
4315
4316void
4317ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4318{
4319 clear_pending (EV_A_ (W)w);
4320 if (expect_false (!ev_is_active (w)))
4321 return;
4322
4323 EV_FREQUENT_CHECK;
4324 ev_ref (EV_A);
4325
4326 {
4327 int active = ev_active (w);
4328
4329 cleanups [active - 1] = cleanups [--cleanupcnt];
4330 ev_active (cleanups [active - 1]) = active;
4331 }
4332
4333 ev_stop (EV_A_ (W)w);
4334
4335 EV_FREQUENT_CHECK;
2511} 4336}
2512#endif 4337#endif
2513 4338
2514#if EV_ASYNC_ENABLE 4339#if EV_ASYNC_ENABLE
2515void 4340void
2516ev_async_start (EV_P_ ev_async *w) 4341ev_async_start (EV_P_ ev_async *w) EV_THROW
2517{ 4342{
2518 if (expect_false (ev_is_active (w))) 4343 if (expect_false (ev_is_active (w)))
2519 return; 4344 return;
2520 4345
4346 w->sent = 0;
4347
2521 evpipe_init (EV_A); 4348 evpipe_init (EV_A);
4349
4350 EV_FREQUENT_CHECK;
2522 4351
2523 ev_start (EV_A_ (W)w, ++asynccnt); 4352 ev_start (EV_A_ (W)w, ++asynccnt);
2524 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4353 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2525 asyncs [asynccnt - 1] = w; 4354 asyncs [asynccnt - 1] = w;
4355
4356 EV_FREQUENT_CHECK;
2526} 4357}
2527 4358
2528void 4359void
2529ev_async_stop (EV_P_ ev_async *w) 4360ev_async_stop (EV_P_ ev_async *w) EV_THROW
2530{ 4361{
2531 clear_pending (EV_A_ (W)w); 4362 clear_pending (EV_A_ (W)w);
2532 if (expect_false (!ev_is_active (w))) 4363 if (expect_false (!ev_is_active (w)))
2533 return; 4364 return;
2534 4365
4366 EV_FREQUENT_CHECK;
4367
2535 { 4368 {
2536 int active = ((W)w)->active; 4369 int active = ev_active (w);
4370
2537 asyncs [active - 1] = asyncs [--asynccnt]; 4371 asyncs [active - 1] = asyncs [--asynccnt];
2538 ((W)asyncs [active - 1])->active = active; 4372 ev_active (asyncs [active - 1]) = active;
2539 } 4373 }
2540 4374
2541 ev_stop (EV_A_ (W)w); 4375 ev_stop (EV_A_ (W)w);
4376
4377 EV_FREQUENT_CHECK;
2542} 4378}
2543 4379
2544void 4380void
2545ev_async_send (EV_P_ ev_async *w) 4381ev_async_send (EV_P_ ev_async *w) EV_THROW
2546{ 4382{
2547 w->sent = 1; 4383 w->sent = 1;
2548 evpipe_write (EV_A_ &gotasync); 4384 evpipe_write (EV_A_ &async_pending);
2549} 4385}
2550#endif 4386#endif
2551 4387
2552/*****************************************************************************/ 4388/*****************************************************************************/
2553 4389
… …
2563once_cb (EV_P_ struct ev_once *once, int revents) 4399once_cb (EV_P_ struct ev_once *once, int revents)
2564{ 4400{
2565 void (*cb)(int revents, void *arg) = once->cb; 4401 void (*cb)(int revents, void *arg) = once->cb;
2566 void *arg = once->arg; 4402 void *arg = once->arg;
2567 4403
2568 ev_io_stop (EV_A_ &once->io); 4404 ev_io_stop (EV_A_ &once->io);
2569 ev_timer_stop (EV_A_ &once->to); 4405 ev_timer_stop (EV_A_ &once->to);
2570 ev_free (once); 4406 ev_free (once);
2571 4407
2572 cb (revents, arg); 4408 cb (revents, arg);
2573} 4409}
2574 4410
2575static void 4411static void
2576once_cb_io (EV_P_ ev_io *w, int revents) 4412once_cb_io (EV_P_ ev_io *w, int revents)
2577{ 4413{
2578 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4414 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4415
4416 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2579} 4417}
2580 4418
2581static void 4419static void
2582once_cb_to (EV_P_ ev_timer *w, int revents) 4420once_cb_to (EV_P_ ev_timer *w, int revents)
2583{ 4421{
2584 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4422 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4423
4424 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2585} 4425}
2586 4426
2587void 4427void
2588ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4428ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2589{ 4429{
2590 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4430 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2591 4431
2592 if (expect_false (!once)) 4432 if (expect_false (!once))
2593 { 4433 {
2594 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4434 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2595 return; 4435 return;
2596 } 4436 }
2597 4437
2598 once->cb = cb; 4438 once->cb = cb;
2599 once->arg = arg; 4439 once->arg = arg;
… …
2611 ev_timer_set (&once->to, timeout, 0.); 4451 ev_timer_set (&once->to, timeout, 0.);
2612 ev_timer_start (EV_A_ &once->to); 4452 ev_timer_start (EV_A_ &once->to);
2613 } 4453 }
2614} 4454}
2615 4455
4456/*****************************************************************************/
4457
4458#if EV_WALK_ENABLE
4459void ecb_cold
4460ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4461{
4462 int i, j;
4463 ev_watcher_list *wl, *wn;
4464
4465 if (types & (EV_IO | EV_EMBED))
4466 for (i = 0; i < anfdmax; ++i)
4467 for (wl = anfds [i].head; wl; )
4468 {
4469 wn = wl->next;
4470
4471#if EV_EMBED_ENABLE
4472 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4473 {
4474 if (types & EV_EMBED)
4475 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4476 }
4477 else
4478#endif
4479#if EV_USE_INOTIFY
4480 if (ev_cb ((ev_io *)wl) == infy_cb)
4481 ;
4482 else
4483#endif
4484 if ((ev_io *)wl != &pipe_w)
4485 if (types & EV_IO)
4486 cb (EV_A_ EV_IO, wl);
4487
4488 wl = wn;
4489 }
4490
4491 if (types & (EV_TIMER | EV_STAT))
4492 for (i = timercnt + HEAP0; i-- > HEAP0; )
4493#if EV_STAT_ENABLE
4494 /*TODO: timer is not always active*/
4495 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4496 {
4497 if (types & EV_STAT)
4498 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4499 }
4500 else
4501#endif
4502 if (types & EV_TIMER)
4503 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4504
4505#if EV_PERIODIC_ENABLE
4506 if (types & EV_PERIODIC)
4507 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4508 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4509#endif
4510
4511#if EV_IDLE_ENABLE
4512 if (types & EV_IDLE)
4513 for (j = NUMPRI; j--; )
4514 for (i = idlecnt [j]; i--; )
4515 cb (EV_A_ EV_IDLE, idles [j][i]);
4516#endif
4517
4518#if EV_FORK_ENABLE
4519 if (types & EV_FORK)
4520 for (i = forkcnt; i--; )
4521 if (ev_cb (forks [i]) != embed_fork_cb)
4522 cb (EV_A_ EV_FORK, forks [i]);
4523#endif
4524
4525#if EV_ASYNC_ENABLE
4526 if (types & EV_ASYNC)
4527 for (i = asynccnt; i--; )
4528 cb (EV_A_ EV_ASYNC, asyncs [i]);
4529#endif
4530
4531#if EV_PREPARE_ENABLE
4532 if (types & EV_PREPARE)
4533 for (i = preparecnt; i--; )
4534# if EV_EMBED_ENABLE
4535 if (ev_cb (prepares [i]) != embed_prepare_cb)
4536# endif
4537 cb (EV_A_ EV_PREPARE, prepares [i]);
4538#endif
4539
4540#if EV_CHECK_ENABLE
4541 if (types & EV_CHECK)
4542 for (i = checkcnt; i--; )
4543 cb (EV_A_ EV_CHECK, checks [i]);
4544#endif
4545
4546#if EV_SIGNAL_ENABLE
4547 if (types & EV_SIGNAL)
4548 for (i = 0; i < EV_NSIG - 1; ++i)
4549 for (wl = signals [i].head; wl; )
4550 {
4551 wn = wl->next;
4552 cb (EV_A_ EV_SIGNAL, wl);
4553 wl = wn;
4554 }
4555#endif
4556
4557#if EV_CHILD_ENABLE
4558 if (types & EV_CHILD)
4559 for (i = (EV_PID_HASHSIZE); i--; )
4560 for (wl = childs [i]; wl; )
4561 {
4562 wn = wl->next;
4563 cb (EV_A_ EV_CHILD, wl);
4564 wl = wn;
4565 }
4566#endif
4567/* EV_STAT 0x00001000 /* stat data changed */
4568/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4569}
4570#endif
4571
2616#if EV_MULTIPLICITY 4572#if EV_MULTIPLICITY
2617 #include "ev_wrap.h" 4573 #include "ev_wrap.h"
2618#endif 4574#endif
2619 4575
2620#ifdef __cplusplus
2621}
2622#endif
2623

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