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Comparing libev/ev.c (file contents):
Revision 1.230 by root, Fri May 2 08:13:16 2008 UTC vs.
Revision 1.412 by root, Wed Feb 22 01:53:00 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 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
160# include <windows.h> 206# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 207# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 208# define EV_SELECT_IS_WINSOCKET 1
163# endif 209# endif
210# undef EV_AVOID_STDIO
164#endif 211#endif
212
213/* OS X, in its infinite idiocy, actually HARDCODES
214 * a limit of 1024 into their select. Where people have brains,
215 * OS X engineers apparently have a vacuum. Or maybe they were
216 * ordered to have a vacuum, or they do anything for money.
217 * This might help. Or not.
218 */
219#define _DARWIN_UNLIMITED_SELECT 1
165 220
166/* this block tries to deduce configuration from header-defined symbols and defaults */ 221/* this block tries to deduce configuration from header-defined symbols and defaults */
167 222
223/* try to deduce the maximum number of signals on this platform */
224#if defined (EV_NSIG)
225/* use what's provided */
226#elif defined (NSIG)
227# define EV_NSIG (NSIG)
228#elif defined(_NSIG)
229# define EV_NSIG (_NSIG)
230#elif defined (SIGMAX)
231# define EV_NSIG (SIGMAX+1)
232#elif defined (SIG_MAX)
233# define EV_NSIG (SIG_MAX+1)
234#elif defined (_SIG_MAX)
235# define EV_NSIG (_SIG_MAX+1)
236#elif defined (MAXSIG)
237# define EV_NSIG (MAXSIG+1)
238#elif defined (MAX_SIG)
239# define EV_NSIG (MAX_SIG+1)
240#elif defined (SIGARRAYSIZE)
241# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
242#elif defined (_sys_nsig)
243# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
244#else
245# error "unable to find value for NSIG, please report"
246/* to make it compile regardless, just remove the above line, */
247/* but consider reporting it, too! :) */
248# define EV_NSIG 65
249#endif
250
251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
253#endif
254
255#ifndef EV_USE_CLOCK_SYSCALL
256# if __linux && __GLIBC__ >= 2
257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
258# else
259# define EV_USE_CLOCK_SYSCALL 0
260# endif
261#endif
262
168#ifndef EV_USE_MONOTONIC 263#ifndef EV_USE_MONOTONIC
264# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
265# define EV_USE_MONOTONIC EV_FEATURE_OS
266# else
169# define EV_USE_MONOTONIC 0 267# define EV_USE_MONOTONIC 0
268# endif
170#endif 269#endif
171 270
172#ifndef EV_USE_REALTIME 271#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 272# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 273#endif
175 274
176#ifndef EV_USE_NANOSLEEP 275#ifndef EV_USE_NANOSLEEP
276# if _POSIX_C_SOURCE >= 199309L
277# define EV_USE_NANOSLEEP EV_FEATURE_OS
278# else
177# define EV_USE_NANOSLEEP 0 279# define EV_USE_NANOSLEEP 0
280# endif
178#endif 281#endif
179 282
180#ifndef EV_USE_SELECT 283#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 284# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 285#endif
183 286
184#ifndef EV_USE_POLL 287#ifndef EV_USE_POLL
185# ifdef _WIN32 288# ifdef _WIN32
186# define EV_USE_POLL 0 289# define EV_USE_POLL 0
187# else 290# else
188# define EV_USE_POLL 1 291# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 292# endif
190#endif 293#endif
191 294
192#ifndef EV_USE_EPOLL 295#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 296# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 297# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 298# else
196# define EV_USE_EPOLL 0 299# define EV_USE_EPOLL 0
197# endif 300# endif
198#endif 301#endif
199 302
… …
205# define EV_USE_PORT 0 308# define EV_USE_PORT 0
206#endif 309#endif
207 310
208#ifndef EV_USE_INOTIFY 311#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 312# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 313# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 314# else
212# define EV_USE_INOTIFY 0 315# define EV_USE_INOTIFY 0
213# endif 316# endif
214#endif 317#endif
215 318
216#ifndef EV_PID_HASHSIZE 319#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 320# 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 321#endif
223 322
224#ifndef EV_INOTIFY_HASHSIZE 323#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 324# 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 325#endif
231 326
232#ifndef EV_USE_EVENTFD 327#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 328# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 329# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 330# else
236# define EV_USE_EVENTFD 0 331# define EV_USE_EVENTFD 0
237# endif 332# endif
238#endif 333#endif
239 334
335#ifndef EV_USE_SIGNALFD
336# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
337# define EV_USE_SIGNALFD EV_FEATURE_OS
338# else
339# define EV_USE_SIGNALFD 0
340# endif
341#endif
342
343#if 0 /* debugging */
344# define EV_VERIFY 3
345# define EV_USE_4HEAP 1
346# define EV_HEAP_CACHE_AT 1
347#endif
348
349#ifndef EV_VERIFY
350# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
351#endif
352
353#ifndef EV_USE_4HEAP
354# define EV_USE_4HEAP EV_FEATURE_DATA
355#endif
356
357#ifndef EV_HEAP_CACHE_AT
358# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
359#endif
360
361/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
362/* which makes programs even slower. might work on other unices, too. */
363#if EV_USE_CLOCK_SYSCALL
364# include <syscall.h>
365# ifdef SYS_clock_gettime
366# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
367# undef EV_USE_MONOTONIC
368# define EV_USE_MONOTONIC 1
369# else
370# undef EV_USE_CLOCK_SYSCALL
371# define EV_USE_CLOCK_SYSCALL 0
372# endif
373#endif
374
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 375/* this block fixes any misconfiguration where we know we run into trouble otherwise */
376
377#ifdef _AIX
378/* AIX has a completely broken poll.h header */
379# undef EV_USE_POLL
380# define EV_USE_POLL 0
381#endif
241 382
242#ifndef CLOCK_MONOTONIC 383#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0 385# define EV_USE_MONOTONIC 0
245#endif 386#endif
… …
253# undef EV_USE_INOTIFY 394# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0 395# define EV_USE_INOTIFY 0
255#endif 396#endif
256 397
257#if !EV_USE_NANOSLEEP 398#if !EV_USE_NANOSLEEP
258# ifndef _WIN32 399/* hp-ux has it in sys/time.h, which we unconditionally include above */
400# if !defined(_WIN32) && !defined(__hpux)
259# include <sys/select.h> 401# include <sys/select.h>
260# endif 402# endif
261#endif 403#endif
262 404
263#if EV_USE_INOTIFY 405#if EV_USE_INOTIFY
406# include <sys/statfs.h>
264# include <sys/inotify.h> 407# include <sys/inotify.h>
408/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
409# ifndef IN_DONT_FOLLOW
410# undef EV_USE_INOTIFY
411# define EV_USE_INOTIFY 0
412# endif
265#endif 413#endif
266 414
267#if EV_SELECT_IS_WINSOCKET 415#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h> 416# include <winsock.h>
269#endif 417#endif
270 418
271#if EV_USE_EVENTFD 419#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 420/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h> 421# include <stdint.h>
274# ifdef __cplusplus 422# ifndef EFD_NONBLOCK
275extern "C" { 423# define EFD_NONBLOCK O_NONBLOCK
276# endif 424# endif
277int eventfd (unsigned int initval, int flags); 425# ifndef EFD_CLOEXEC
278# ifdef __cplusplus 426# ifdef O_CLOEXEC
279} 427# define EFD_CLOEXEC O_CLOEXEC
428# else
429# define EFD_CLOEXEC 02000000
430# endif
280# endif 431# endif
432EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
433#endif
434
435#if EV_USE_SIGNALFD
436/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
437# include <stdint.h>
438# ifndef SFD_NONBLOCK
439# define SFD_NONBLOCK O_NONBLOCK
440# endif
441# ifndef SFD_CLOEXEC
442# ifdef O_CLOEXEC
443# define SFD_CLOEXEC O_CLOEXEC
444# else
445# define SFD_CLOEXEC 02000000
446# endif
447# endif
448EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
449
450struct signalfd_siginfo
451{
452 uint32_t ssi_signo;
453 char pad[128 - sizeof (uint32_t)];
454};
281#endif 455#endif
282 456
283/**/ 457/**/
284 458
459#if EV_VERIFY >= 3
460# define EV_FREQUENT_CHECK ev_verify (EV_A)
461#else
462# define EV_FREQUENT_CHECK do { } while (0)
463#endif
464
285/* 465/*
286 * This is used to avoid floating point rounding problems. 466 * This is used to work around floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000. 467 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */ 468 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 469#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
470/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
294 471
295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 472#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 473#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
298 474
475#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
476#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
477
478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
479/* ECB.H BEGIN */
480/*
481 * libecb - http://software.schmorp.de/pkg/libecb
482 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved.
486 *
487 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met:
489 *
490 * 1. Redistributions of source code must retain the above copyright notice,
491 * this list of conditions and the following disclaimer.
492 *
493 * 2. Redistributions in binary form must reproduce the above copyright
494 * notice, this list of conditions and the following disclaimer in the
495 * documentation and/or other materials provided with the distribution.
496 *
497 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
498 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
499 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
500 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
501 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
505 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE.
507 */
508
509#ifndef ECB_H
510#define ECB_H
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;
299#if __GNUC__ >= 4 519 #if __GNUC__
300# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
301# 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
302#else 526#else
303# define expect(expr,value) (expr) 527 #include <inttypes.h>
304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif 528#endif
529
530/* many compilers define _GNUC_ to some versions but then only implement
531 * what their idiot authors think are the "more important" extensions,
532 * causing enormous grief in return for some better fake benchmark numbers.
533 * or so.
534 * we try to detect these and simply assume they are not gcc - if they have
535 * an issue with that they should have done it right in the first place.
536 */
537#ifndef ECB_GCC_VERSION
538 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
539 #define ECB_GCC_VERSION(major,minor) 0
540 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
308#endif 542 #endif
543#endif
309 544
545/*****************************************************************************/
546
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549
550#if ECB_NO_THREADS
551# define ECB_NO_SMP 1
552#endif
553
554#if ECB_NO_THREADS || ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0)
556#endif
557
558#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
571 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
574 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
576 #elif __sparc || __sparc__
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined(__s390__) || defined(__s390x__)
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #elif defined(__mips__)
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
584 #endif
585 #endif
586#endif
587
588#ifndef ECB_MEMORY_FENCE
589 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
590 #define ECB_MEMORY_FENCE __sync_synchronize ()
591 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
592 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
593 #elif _MSC_VER >= 1400 /* VC++ 2005 */
594 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
595 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
596 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
597 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
598 #elif defined(_WIN32)
599 #include <WinNT.h>
600 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
601 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
602 #include <mbarrier.h>
603 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
604 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
605 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
606 #endif
607#endif
608
609#ifndef ECB_MEMORY_FENCE
610 #if !ECB_AVOID_PTHREADS
611 /*
612 * if you get undefined symbol references to pthread_mutex_lock,
613 * or failure to find pthread.h, then you should implement
614 * the ECB_MEMORY_FENCE operations for your cpu/compiler
615 * OR provide pthread.h and link against the posix thread library
616 * of your system.
617 */
618 #include <pthread.h>
619 #define ECB_NEEDS_PTHREADS 1
620 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
621
622 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
623 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
624 #endif
625#endif
626
627#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
628 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
629#endif
630
631#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
632 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
633#endif
634
635/*****************************************************************************/
636
637#define ECB_C99 (__STDC_VERSION__ >= 199901L)
638
639#if __cplusplus
640 #define ecb_inline static inline
641#elif ECB_GCC_VERSION(2,5)
642 #define ecb_inline static __inline__
643#elif ECB_C99
644 #define ecb_inline static inline
645#else
646 #define ecb_inline static
647#endif
648
649#if ECB_GCC_VERSION(3,3)
650 #define ecb_restrict __restrict__
651#elif ECB_C99
652 #define ecb_restrict restrict
653#else
654 #define ecb_restrict
655#endif
656
657typedef int ecb_bool;
658
659#define ECB_CONCAT_(a, b) a ## b
660#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
661#define ECB_STRINGIFY_(a) # a
662#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
663
664#define ecb_function_ ecb_inline
665
666#if ECB_GCC_VERSION(3,1)
667 #define ecb_attribute(attrlist) __attribute__(attrlist)
668 #define ecb_is_constant(expr) __builtin_constant_p (expr)
669 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
670 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
671#else
672 #define ecb_attribute(attrlist)
673 #define ecb_is_constant(expr) 0
674 #define ecb_expect(expr,value) (expr)
675 #define ecb_prefetch(addr,rw,locality)
676#endif
677
678/* no emulation for ecb_decltype */
679#if ECB_GCC_VERSION(4,5)
680 #define ecb_decltype(x) __decltype(x)
681#elif ECB_GCC_VERSION(3,0)
682 #define ecb_decltype(x) __typeof(x)
683#endif
684
685#define ecb_noinline ecb_attribute ((__noinline__))
686#define ecb_noreturn ecb_attribute ((__noreturn__))
687#define ecb_unused ecb_attribute ((__unused__))
688#define ecb_const ecb_attribute ((__const__))
689#define ecb_pure ecb_attribute ((__pure__))
690
691#if ECB_GCC_VERSION(4,3)
692 #define ecb_artificial ecb_attribute ((__artificial__))
693 #define ecb_hot ecb_attribute ((__hot__))
694 #define ecb_cold ecb_attribute ((__cold__))
695#else
696 #define ecb_artificial
697 #define ecb_hot
698 #define ecb_cold
699#endif
700
701/* put around conditional expressions if you are very sure that the */
702/* expression is mostly true or mostly false. note that these return */
703/* booleans, not the expression. */
310#define expect_false(expr) expect ((expr) != 0, 0) 704#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
311#define expect_true(expr) expect ((expr) != 0, 1) 705#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
706/* for compatibility to the rest of the world */
707#define ecb_likely(expr) ecb_expect_true (expr)
708#define ecb_unlikely(expr) ecb_expect_false (expr)
709
710/* count trailing zero bits and count # of one bits */
711#if ECB_GCC_VERSION(3,4)
712 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
713 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
714 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
715 #define ecb_ctz32(x) __builtin_ctz (x)
716 #define ecb_ctz64(x) __builtin_ctzll (x)
717 #define ecb_popcount32(x) __builtin_popcount (x)
718 /* no popcountll */
719#else
720 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
721 ecb_function_ int
722 ecb_ctz32 (uint32_t x)
723 {
724 int r = 0;
725
726 x &= ~x + 1; /* this isolates the lowest bit */
727
728#if ECB_branchless_on_i386
729 r += !!(x & 0xaaaaaaaa) << 0;
730 r += !!(x & 0xcccccccc) << 1;
731 r += !!(x & 0xf0f0f0f0) << 2;
732 r += !!(x & 0xff00ff00) << 3;
733 r += !!(x & 0xffff0000) << 4;
734#else
735 if (x & 0xaaaaaaaa) r += 1;
736 if (x & 0xcccccccc) r += 2;
737 if (x & 0xf0f0f0f0) r += 4;
738 if (x & 0xff00ff00) r += 8;
739 if (x & 0xffff0000) r += 16;
740#endif
741
742 return r;
743 }
744
745 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
746 ecb_function_ int
747 ecb_ctz64 (uint64_t x)
748 {
749 int shift = x & 0xffffffffU ? 0 : 32;
750 return ecb_ctz32 (x >> shift) + shift;
751 }
752
753 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
754 ecb_function_ int
755 ecb_popcount32 (uint32_t x)
756 {
757 x -= (x >> 1) & 0x55555555;
758 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
759 x = ((x >> 4) + x) & 0x0f0f0f0f;
760 x *= 0x01010101;
761
762 return x >> 24;
763 }
764
765 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
766 ecb_function_ int ecb_ld32 (uint32_t x)
767 {
768 int r = 0;
769
770 if (x >> 16) { x >>= 16; r += 16; }
771 if (x >> 8) { x >>= 8; r += 8; }
772 if (x >> 4) { x >>= 4; r += 4; }
773 if (x >> 2) { x >>= 2; r += 2; }
774 if (x >> 1) { r += 1; }
775
776 return r;
777 }
778
779 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
780 ecb_function_ int ecb_ld64 (uint64_t x)
781 {
782 int r = 0;
783
784 if (x >> 32) { x >>= 32; r += 32; }
785
786 return r + ecb_ld32 (x);
787 }
788#endif
789
790ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
791ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
792{
793 return ( (x * 0x0802U & 0x22110U)
794 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
795}
796
797ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
798ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
799{
800 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
801 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
802 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
803 x = ( x >> 8 ) | ( x << 8);
804
805 return x;
806}
807
808ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
809ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
810{
811 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
812 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
813 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
814 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
815 x = ( x >> 16 ) | ( x << 16);
816
817 return x;
818}
819
820/* popcount64 is only available on 64 bit cpus as gcc builtin */
821/* so for this version we are lazy */
822ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
823ecb_function_ int
824ecb_popcount64 (uint64_t x)
825{
826 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
827}
828
829ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
830ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
831ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
832ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
833ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
834ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
835ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
836ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
837
838ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
839ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
840ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
841ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
842ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
843ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
844ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
845ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
846
847#if ECB_GCC_VERSION(4,3)
848 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
849 #define ecb_bswap32(x) __builtin_bswap32 (x)
850 #define ecb_bswap64(x) __builtin_bswap64 (x)
851#else
852 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
853 ecb_function_ uint16_t
854 ecb_bswap16 (uint16_t x)
855 {
856 return ecb_rotl16 (x, 8);
857 }
858
859 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
860 ecb_function_ uint32_t
861 ecb_bswap32 (uint32_t x)
862 {
863 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
864 }
865
866 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
867 ecb_function_ uint64_t
868 ecb_bswap64 (uint64_t x)
869 {
870 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
871 }
872#endif
873
874#if ECB_GCC_VERSION(4,5)
875 #define ecb_unreachable() __builtin_unreachable ()
876#else
877 /* this seems to work fine, but gcc always emits a warning for it :/ */
878 ecb_inline void ecb_unreachable (void) ecb_noreturn;
879 ecb_inline void ecb_unreachable (void) { }
880#endif
881
882/* try to tell the compiler that some condition is definitely true */
883#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
884
885ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
886ecb_inline unsigned char
887ecb_byteorder_helper (void)
888{
889 const uint32_t u = 0x11223344;
890 return *(unsigned char *)&u;
891}
892
893ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
894ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
895ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
896ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
897
898#if ECB_GCC_VERSION(3,0) || ECB_C99
899 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
900#else
901 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
902#endif
903
904#if __cplusplus
905 template<typename T>
906 static inline T ecb_div_rd (T val, T div)
907 {
908 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
909 }
910 template<typename T>
911 static inline T ecb_div_ru (T val, T div)
912 {
913 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
914 }
915#else
916 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
917 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
918#endif
919
920#if ecb_cplusplus_does_not_suck
921 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
922 template<typename T, int N>
923 static inline int ecb_array_length (const T (&arr)[N])
924 {
925 return N;
926 }
927#else
928 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
929#endif
930
931#endif
932
933/* ECB.H END */
934
935#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
936/* if your architecture doesn't need memory fences, e.g. because it is
937 * single-cpu/core, or if you use libev in a project that doesn't use libev
938 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
939 * libev, in which cases the memory fences become nops.
940 * alternatively, you can remove this #error and link against libpthread,
941 * which will then provide the memory fences.
942 */
943# error "memory fences not defined for your architecture, please report"
944#endif
945
946#ifndef ECB_MEMORY_FENCE
947# define ECB_MEMORY_FENCE do { } while (0)
948# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
949# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
950#endif
951
952#define expect_false(cond) ecb_expect_false (cond)
953#define expect_true(cond) ecb_expect_true (cond)
954#define noinline ecb_noinline
955
312#define inline_size static inline 956#define inline_size ecb_inline
313 957
314#if EV_MINIMAL 958#if EV_FEATURE_CODE
959# define inline_speed ecb_inline
960#else
315# define inline_speed static noinline 961# define inline_speed static noinline
962#endif
963
964#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
965
966#if EV_MINPRI == EV_MAXPRI
967# define ABSPRI(w) (((W)w), 0)
316#else 968#else
317# define inline_speed static inline
318#endif
319
320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 969# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
970#endif
322 971
323#define EMPTY /* required for microsofts broken pseudo-c compiler */ 972#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */ 973#define EMPTY2(a,b) /* used to suppress some warnings */
325 974
326typedef ev_watcher *W; 975typedef ev_watcher *W;
… …
328typedef ev_watcher_time *WT; 977typedef ev_watcher_time *WT;
329 978
330#define ev_active(w) ((W)(w))->active 979#define ev_active(w) ((W)(w))->active
331#define ev_at(w) ((WT)(w))->at 980#define ev_at(w) ((WT)(w))->at
332 981
982#if EV_USE_REALTIME
983/* sig_atomic_t is used to avoid per-thread variables or locking but still */
984/* giving it a reasonably high chance of working on typical architectures */
985static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
986#endif
987
333#if EV_USE_MONOTONIC 988#if EV_USE_MONOTONIC
334/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335/* giving it a reasonably high chance of working on typical architetcures */
336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 989static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
990#endif
991
992#ifndef EV_FD_TO_WIN32_HANDLE
993# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
994#endif
995#ifndef EV_WIN32_HANDLE_TO_FD
996# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
997#endif
998#ifndef EV_WIN32_CLOSE_FD
999# define EV_WIN32_CLOSE_FD(fd) close (fd)
337#endif 1000#endif
338 1001
339#ifdef _WIN32 1002#ifdef _WIN32
340# include "ev_win32.c" 1003# include "ev_win32.c"
341#endif 1004#endif
342 1005
343/*****************************************************************************/ 1006/*****************************************************************************/
344 1007
1008/* define a suitable floor function (only used by periodics atm) */
1009
1010#if EV_USE_FLOOR
1011# include <math.h>
1012# define ev_floor(v) floor (v)
1013#else
1014
1015#include <float.h>
1016
1017/* a floor() replacement function, should be independent of ev_tstamp type */
1018static ev_tstamp noinline
1019ev_floor (ev_tstamp v)
1020{
1021 /* the choice of shift factor is not terribly important */
1022#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1023 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1024#else
1025 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1026#endif
1027
1028 /* argument too large for an unsigned long? */
1029 if (expect_false (v >= shift))
1030 {
1031 ev_tstamp f;
1032
1033 if (v == v - 1.)
1034 return v; /* very large number */
1035
1036 f = shift * ev_floor (v * (1. / shift));
1037 return f + ev_floor (v - f);
1038 }
1039
1040 /* special treatment for negative args? */
1041 if (expect_false (v < 0.))
1042 {
1043 ev_tstamp f = -ev_floor (-v);
1044
1045 return f - (f == v ? 0 : 1);
1046 }
1047
1048 /* fits into an unsigned long */
1049 return (unsigned long)v;
1050}
1051
1052#endif
1053
1054/*****************************************************************************/
1055
1056#ifdef __linux
1057# include <sys/utsname.h>
1058#endif
1059
1060static unsigned int noinline ecb_cold
1061ev_linux_version (void)
1062{
1063#ifdef __linux
1064 unsigned int v = 0;
1065 struct utsname buf;
1066 int i;
1067 char *p = buf.release;
1068
1069 if (uname (&buf))
1070 return 0;
1071
1072 for (i = 3+1; --i; )
1073 {
1074 unsigned int c = 0;
1075
1076 for (;;)
1077 {
1078 if (*p >= '0' && *p <= '9')
1079 c = c * 10 + *p++ - '0';
1080 else
1081 {
1082 p += *p == '.';
1083 break;
1084 }
1085 }
1086
1087 v = (v << 8) | c;
1088 }
1089
1090 return v;
1091#else
1092 return 0;
1093#endif
1094}
1095
1096/*****************************************************************************/
1097
1098#if EV_AVOID_STDIO
1099static void noinline ecb_cold
1100ev_printerr (const char *msg)
1101{
1102 write (STDERR_FILENO, msg, strlen (msg));
1103}
1104#endif
1105
345static void (*syserr_cb)(const char *msg); 1106static void (*syserr_cb)(const char *msg);
346 1107
347void 1108void ecb_cold
348ev_set_syserr_cb (void (*cb)(const char *msg)) 1109ev_set_syserr_cb (void (*cb)(const char *msg))
349{ 1110{
350 syserr_cb = cb; 1111 syserr_cb = cb;
351} 1112}
352 1113
353static void noinline 1114static void noinline ecb_cold
354syserr (const char *msg) 1115ev_syserr (const char *msg)
355{ 1116{
356 if (!msg) 1117 if (!msg)
357 msg = "(libev) system error"; 1118 msg = "(libev) system error";
358 1119
359 if (syserr_cb) 1120 if (syserr_cb)
360 syserr_cb (msg); 1121 syserr_cb (msg);
361 else 1122 else
362 { 1123 {
1124#if EV_AVOID_STDIO
1125 ev_printerr (msg);
1126 ev_printerr (": ");
1127 ev_printerr (strerror (errno));
1128 ev_printerr ("\n");
1129#else
363 perror (msg); 1130 perror (msg);
1131#endif
364 abort (); 1132 abort ();
365 } 1133 }
366} 1134}
367 1135
368static void * 1136static void *
369ev_realloc_emul (void *ptr, long size) 1137ev_realloc_emul (void *ptr, long size)
370{ 1138{
1139#if __GLIBC__
1140 return realloc (ptr, size);
1141#else
371 /* some systems, notably openbsd and darwin, fail to properly 1142 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and 1143 * implement realloc (x, 0) (as required by both ansi c-89 and
373 * the single unix specification, so work around them here. 1144 * the single unix specification, so work around them here.
374 */ 1145 */
375 1146
376 if (size) 1147 if (size)
377 return realloc (ptr, size); 1148 return realloc (ptr, size);
378 1149
379 free (ptr); 1150 free (ptr);
380 return 0; 1151 return 0;
1152#endif
381} 1153}
382 1154
383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1155static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
384 1156
385void 1157void ecb_cold
386ev_set_allocator (void *(*cb)(void *ptr, long size)) 1158ev_set_allocator (void *(*cb)(void *ptr, long size))
387{ 1159{
388 alloc = cb; 1160 alloc = cb;
389} 1161}
390 1162
… …
393{ 1165{
394 ptr = alloc (ptr, size); 1166 ptr = alloc (ptr, size);
395 1167
396 if (!ptr && size) 1168 if (!ptr && size)
397 { 1169 {
1170#if EV_AVOID_STDIO
1171 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1172#else
398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1173 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1174#endif
399 abort (); 1175 abort ();
400 } 1176 }
401 1177
402 return ptr; 1178 return ptr;
403} 1179}
… …
405#define ev_malloc(size) ev_realloc (0, (size)) 1181#define ev_malloc(size) ev_realloc (0, (size))
406#define ev_free(ptr) ev_realloc ((ptr), 0) 1182#define ev_free(ptr) ev_realloc ((ptr), 0)
407 1183
408/*****************************************************************************/ 1184/*****************************************************************************/
409 1185
1186/* set in reify when reification needed */
1187#define EV_ANFD_REIFY 1
1188
1189/* file descriptor info structure */
410typedef struct 1190typedef struct
411{ 1191{
412 WL head; 1192 WL head;
413 unsigned char events; 1193 unsigned char events; /* the events watched for */
1194 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1195 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
414 unsigned char reify; 1196 unsigned char unused;
1197#if EV_USE_EPOLL
1198 unsigned int egen; /* generation counter to counter epoll bugs */
1199#endif
415#if EV_SELECT_IS_WINSOCKET 1200#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
416 SOCKET handle; 1201 SOCKET handle;
417#endif 1202#endif
1203#if EV_USE_IOCP
1204 OVERLAPPED or, ow;
1205#endif
418} ANFD; 1206} ANFD;
419 1207
1208/* stores the pending event set for a given watcher */
420typedef struct 1209typedef struct
421{ 1210{
422 W w; 1211 W w;
423 int events; 1212 int events; /* the pending event set for the given watcher */
424} ANPENDING; 1213} ANPENDING;
425 1214
426#if EV_USE_INOTIFY 1215#if EV_USE_INOTIFY
1216/* hash table entry per inotify-id */
427typedef struct 1217typedef struct
428{ 1218{
429 WL head; 1219 WL head;
430} ANFS; 1220} ANFS;
1221#endif
1222
1223/* Heap Entry */
1224#if EV_HEAP_CACHE_AT
1225 /* a heap element */
1226 typedef struct {
1227 ev_tstamp at;
1228 WT w;
1229 } ANHE;
1230
1231 #define ANHE_w(he) (he).w /* access watcher, read-write */
1232 #define ANHE_at(he) (he).at /* access cached at, read-only */
1233 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1234#else
1235 /* a heap element */
1236 typedef WT ANHE;
1237
1238 #define ANHE_w(he) (he)
1239 #define ANHE_at(he) (he)->at
1240 #define ANHE_at_cache(he)
431#endif 1241#endif
432 1242
433#if EV_MULTIPLICITY 1243#if EV_MULTIPLICITY
434 1244
435 struct ev_loop 1245 struct ev_loop
… …
441 #undef VAR 1251 #undef VAR
442 }; 1252 };
443 #include "ev_wrap.h" 1253 #include "ev_wrap.h"
444 1254
445 static struct ev_loop default_loop_struct; 1255 static struct ev_loop default_loop_struct;
446 struct ev_loop *ev_default_loop_ptr; 1256 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
447 1257
448#else 1258#else
449 1259
450 ev_tstamp ev_rt_now; 1260 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
451 #define VAR(name,decl) static decl; 1261 #define VAR(name,decl) static decl;
452 #include "ev_vars.h" 1262 #include "ev_vars.h"
453 #undef VAR 1263 #undef VAR
454 1264
455 static int ev_default_loop_ptr; 1265 static int ev_default_loop_ptr;
456 1266
457#endif 1267#endif
458 1268
1269#if EV_FEATURE_API
1270# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1271# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1272# define EV_INVOKE_PENDING invoke_cb (EV_A)
1273#else
1274# define EV_RELEASE_CB (void)0
1275# define EV_ACQUIRE_CB (void)0
1276# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1277#endif
1278
1279#define EVBREAK_RECURSE 0x80
1280
459/*****************************************************************************/ 1281/*****************************************************************************/
460 1282
1283#ifndef EV_HAVE_EV_TIME
461ev_tstamp 1284ev_tstamp
462ev_time (void) 1285ev_time (void)
463{ 1286{
464#if EV_USE_REALTIME 1287#if EV_USE_REALTIME
1288 if (expect_true (have_realtime))
1289 {
465 struct timespec ts; 1290 struct timespec ts;
466 clock_gettime (CLOCK_REALTIME, &ts); 1291 clock_gettime (CLOCK_REALTIME, &ts);
467 return ts.tv_sec + ts.tv_nsec * 1e-9; 1292 return ts.tv_sec + ts.tv_nsec * 1e-9;
468#else 1293 }
1294#endif
1295
469 struct timeval tv; 1296 struct timeval tv;
470 gettimeofday (&tv, 0); 1297 gettimeofday (&tv, 0);
471 return tv.tv_sec + tv.tv_usec * 1e-6; 1298 return tv.tv_sec + tv.tv_usec * 1e-6;
472#endif
473} 1299}
1300#endif
474 1301
475ev_tstamp inline_size 1302inline_size ev_tstamp
476get_clock (void) 1303get_clock (void)
477{ 1304{
478#if EV_USE_MONOTONIC 1305#if EV_USE_MONOTONIC
479 if (expect_true (have_monotonic)) 1306 if (expect_true (have_monotonic))
480 { 1307 {
… …
501 if (delay > 0.) 1328 if (delay > 0.)
502 { 1329 {
503#if EV_USE_NANOSLEEP 1330#if EV_USE_NANOSLEEP
504 struct timespec ts; 1331 struct timespec ts;
505 1332
506 ts.tv_sec = (time_t)delay; 1333 EV_TS_SET (ts, delay);
507 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509 nanosleep (&ts, 0); 1334 nanosleep (&ts, 0);
510#elif defined(_WIN32) 1335#elif defined(_WIN32)
511 Sleep ((unsigned long)(delay * 1e3)); 1336 Sleep ((unsigned long)(delay * 1e3));
512#else 1337#else
513 struct timeval tv; 1338 struct timeval tv;
514 1339
515 tv.tv_sec = (time_t)delay; 1340 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
516 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1341 /* something not guaranteed by newer posix versions, but guaranteed */
517 1342 /* by older ones */
1343 EV_TV_SET (tv, delay);
518 select (0, 0, 0, 0, &tv); 1344 select (0, 0, 0, 0, &tv);
519#endif 1345#endif
520 } 1346 }
521} 1347}
522 1348
523/*****************************************************************************/ 1349/*****************************************************************************/
524 1350
525int inline_size 1351#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1352
1353/* find a suitable new size for the given array, */
1354/* hopefully by rounding to a nice-to-malloc size */
1355inline_size int
526array_nextsize (int elem, int cur, int cnt) 1356array_nextsize (int elem, int cur, int cnt)
527{ 1357{
528 int ncur = cur + 1; 1358 int ncur = cur + 1;
529 1359
530 do 1360 do
531 ncur <<= 1; 1361 ncur <<= 1;
532 while (cnt > ncur); 1362 while (cnt > ncur);
533 1363
534 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1364 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
535 if (elem * ncur > 4096) 1365 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
536 { 1366 {
537 ncur *= elem; 1367 ncur *= elem;
538 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1368 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
539 ncur = ncur - sizeof (void *) * 4; 1369 ncur = ncur - sizeof (void *) * 4;
540 ncur /= elem; 1370 ncur /= elem;
541 } 1371 }
542 1372
543 return ncur; 1373 return ncur;
544} 1374}
545 1375
546static noinline void * 1376static void * noinline ecb_cold
547array_realloc (int elem, void *base, int *cur, int cnt) 1377array_realloc (int elem, void *base, int *cur, int cnt)
548{ 1378{
549 *cur = array_nextsize (elem, *cur, cnt); 1379 *cur = array_nextsize (elem, *cur, cnt);
550 return ev_realloc (base, elem * *cur); 1380 return ev_realloc (base, elem * *cur);
551} 1381}
1382
1383#define array_init_zero(base,count) \
1384 memset ((void *)(base), 0, sizeof (*(base)) * (count))
552 1385
553#define array_needsize(type,base,cur,cnt,init) \ 1386#define array_needsize(type,base,cur,cnt,init) \
554 if (expect_false ((cnt) > (cur))) \ 1387 if (expect_false ((cnt) > (cur))) \
555 { \ 1388 { \
556 int ocur_ = (cur); \ 1389 int ecb_unused ocur_ = (cur); \
557 (base) = (type *)array_realloc \ 1390 (base) = (type *)array_realloc \
558 (sizeof (type), (base), &(cur), (cnt)); \ 1391 (sizeof (type), (base), &(cur), (cnt)); \
559 init ((base) + (ocur_), (cur) - ocur_); \ 1392 init ((base) + (ocur_), (cur) - ocur_); \
560 } 1393 }
561 1394
… …
568 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1401 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
569 } 1402 }
570#endif 1403#endif
571 1404
572#define array_free(stem, idx) \ 1405#define array_free(stem, idx) \
573 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1406 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
574 1407
575/*****************************************************************************/ 1408/*****************************************************************************/
1409
1410/* dummy callback for pending events */
1411static void noinline
1412pendingcb (EV_P_ ev_prepare *w, int revents)
1413{
1414}
576 1415
577void noinline 1416void noinline
578ev_feed_event (EV_P_ void *w, int revents) 1417ev_feed_event (EV_P_ void *w, int revents)
579{ 1418{
580 W w_ = (W)w; 1419 W w_ = (W)w;
… …
589 pendings [pri][w_->pending - 1].w = w_; 1428 pendings [pri][w_->pending - 1].w = w_;
590 pendings [pri][w_->pending - 1].events = revents; 1429 pendings [pri][w_->pending - 1].events = revents;
591 } 1430 }
592} 1431}
593 1432
594void inline_speed 1433inline_speed void
1434feed_reverse (EV_P_ W w)
1435{
1436 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1437 rfeeds [rfeedcnt++] = w;
1438}
1439
1440inline_size void
1441feed_reverse_done (EV_P_ int revents)
1442{
1443 do
1444 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1445 while (rfeedcnt);
1446}
1447
1448inline_speed void
595queue_events (EV_P_ W *events, int eventcnt, int type) 1449queue_events (EV_P_ W *events, int eventcnt, int type)
596{ 1450{
597 int i; 1451 int i;
598 1452
599 for (i = 0; i < eventcnt; ++i) 1453 for (i = 0; i < eventcnt; ++i)
600 ev_feed_event (EV_A_ events [i], type); 1454 ev_feed_event (EV_A_ events [i], type);
601} 1455}
602 1456
603/*****************************************************************************/ 1457/*****************************************************************************/
604 1458
605void inline_size 1459inline_speed void
606anfds_init (ANFD *base, int count)
607{
608 while (count--)
609 {
610 base->head = 0;
611 base->events = EV_NONE;
612 base->reify = 0;
613
614 ++base;
615 }
616}
617
618void inline_speed
619fd_event (EV_P_ int fd, int revents) 1460fd_event_nocheck (EV_P_ int fd, int revents)
620{ 1461{
621 ANFD *anfd = anfds + fd; 1462 ANFD *anfd = anfds + fd;
622 ev_io *w; 1463 ev_io *w;
623 1464
624 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1465 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
628 if (ev) 1469 if (ev)
629 ev_feed_event (EV_A_ (W)w, ev); 1470 ev_feed_event (EV_A_ (W)w, ev);
630 } 1471 }
631} 1472}
632 1473
1474/* do not submit kernel events for fds that have reify set */
1475/* because that means they changed while we were polling for new events */
1476inline_speed void
1477fd_event (EV_P_ int fd, int revents)
1478{
1479 ANFD *anfd = anfds + fd;
1480
1481 if (expect_true (!anfd->reify))
1482 fd_event_nocheck (EV_A_ fd, revents);
1483}
1484
633void 1485void
634ev_feed_fd_event (EV_P_ int fd, int revents) 1486ev_feed_fd_event (EV_P_ int fd, int revents)
635{ 1487{
636 if (fd >= 0 && fd < anfdmax) 1488 if (fd >= 0 && fd < anfdmax)
637 fd_event (EV_A_ fd, revents); 1489 fd_event_nocheck (EV_A_ fd, revents);
638} 1490}
639 1491
640void inline_size 1492/* make sure the external fd watch events are in-sync */
1493/* with the kernel/libev internal state */
1494inline_size void
641fd_reify (EV_P) 1495fd_reify (EV_P)
642{ 1496{
643 int i; 1497 int i;
1498
1499#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1500 for (i = 0; i < fdchangecnt; ++i)
1501 {
1502 int fd = fdchanges [i];
1503 ANFD *anfd = anfds + fd;
1504
1505 if (anfd->reify & EV__IOFDSET && anfd->head)
1506 {
1507 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1508
1509 if (handle != anfd->handle)
1510 {
1511 unsigned long arg;
1512
1513 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1514
1515 /* handle changed, but fd didn't - we need to do it in two steps */
1516 backend_modify (EV_A_ fd, anfd->events, 0);
1517 anfd->events = 0;
1518 anfd->handle = handle;
1519 }
1520 }
1521 }
1522#endif
644 1523
645 for (i = 0; i < fdchangecnt; ++i) 1524 for (i = 0; i < fdchangecnt; ++i)
646 { 1525 {
647 int fd = fdchanges [i]; 1526 int fd = fdchanges [i];
648 ANFD *anfd = anfds + fd; 1527 ANFD *anfd = anfds + fd;
649 ev_io *w; 1528 ev_io *w;
650 1529
651 unsigned char events = 0; 1530 unsigned char o_events = anfd->events;
1531 unsigned char o_reify = anfd->reify;
652 1532
653 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1533 anfd->reify = 0;
654 events |= (unsigned char)w->events;
655 1534
656#if EV_SELECT_IS_WINSOCKET 1535 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
657 if (events)
658 { 1536 {
659 unsigned long argp; 1537 anfd->events = 0;
660 #ifdef EV_FD_TO_WIN32_HANDLE 1538
661 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1539 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
662 #else 1540 anfd->events |= (unsigned char)w->events;
663 anfd->handle = _get_osfhandle (fd); 1541
664 #endif 1542 if (o_events != anfd->events)
665 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1543 o_reify = EV__IOFDSET; /* actually |= */
666 } 1544 }
667#endif
668 1545
669 { 1546 if (o_reify & EV__IOFDSET)
670 unsigned char o_events = anfd->events;
671 unsigned char o_reify = anfd->reify;
672
673 anfd->reify = 0;
674 anfd->events = events;
675
676 if (o_events != events || o_reify & EV_IOFDSET)
677 backend_modify (EV_A_ fd, o_events, events); 1547 backend_modify (EV_A_ fd, o_events, anfd->events);
678 }
679 } 1548 }
680 1549
681 fdchangecnt = 0; 1550 fdchangecnt = 0;
682} 1551}
683 1552
684void inline_size 1553/* something about the given fd changed */
1554inline_size void
685fd_change (EV_P_ int fd, int flags) 1555fd_change (EV_P_ int fd, int flags)
686{ 1556{
687 unsigned char reify = anfds [fd].reify; 1557 unsigned char reify = anfds [fd].reify;
688 anfds [fd].reify |= flags; 1558 anfds [fd].reify |= flags;
689 1559
… …
693 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1563 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
694 fdchanges [fdchangecnt - 1] = fd; 1564 fdchanges [fdchangecnt - 1] = fd;
695 } 1565 }
696} 1566}
697 1567
698void inline_speed 1568/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1569inline_speed void ecb_cold
699fd_kill (EV_P_ int fd) 1570fd_kill (EV_P_ int fd)
700{ 1571{
701 ev_io *w; 1572 ev_io *w;
702 1573
703 while ((w = (ev_io *)anfds [fd].head)) 1574 while ((w = (ev_io *)anfds [fd].head))
… …
705 ev_io_stop (EV_A_ w); 1576 ev_io_stop (EV_A_ w);
706 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1577 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
707 } 1578 }
708} 1579}
709 1580
710int inline_size 1581/* check whether the given fd is actually valid, for error recovery */
1582inline_size int ecb_cold
711fd_valid (int fd) 1583fd_valid (int fd)
712{ 1584{
713#ifdef _WIN32 1585#ifdef _WIN32
714 return _get_osfhandle (fd) != -1; 1586 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
715#else 1587#else
716 return fcntl (fd, F_GETFD) != -1; 1588 return fcntl (fd, F_GETFD) != -1;
717#endif 1589#endif
718} 1590}
719 1591
720/* called on EBADF to verify fds */ 1592/* called on EBADF to verify fds */
721static void noinline 1593static void noinline ecb_cold
722fd_ebadf (EV_P) 1594fd_ebadf (EV_P)
723{ 1595{
724 int fd; 1596 int fd;
725 1597
726 for (fd = 0; fd < anfdmax; ++fd) 1598 for (fd = 0; fd < anfdmax; ++fd)
727 if (anfds [fd].events) 1599 if (anfds [fd].events)
728 if (!fd_valid (fd) == -1 && errno == EBADF) 1600 if (!fd_valid (fd) && errno == EBADF)
729 fd_kill (EV_A_ fd); 1601 fd_kill (EV_A_ fd);
730} 1602}
731 1603
732/* called on ENOMEM in select/poll to kill some fds and retry */ 1604/* called on ENOMEM in select/poll to kill some fds and retry */
733static void noinline 1605static void noinline ecb_cold
734fd_enomem (EV_P) 1606fd_enomem (EV_P)
735{ 1607{
736 int fd; 1608 int fd;
737 1609
738 for (fd = anfdmax; fd--; ) 1610 for (fd = anfdmax; fd--; )
739 if (anfds [fd].events) 1611 if (anfds [fd].events)
740 { 1612 {
741 fd_kill (EV_A_ fd); 1613 fd_kill (EV_A_ fd);
742 return; 1614 break;
743 } 1615 }
744} 1616}
745 1617
746/* usually called after fork if backend needs to re-arm all fds from scratch */ 1618/* usually called after fork if backend needs to re-arm all fds from scratch */
747static void noinline 1619static void noinline
… …
751 1623
752 for (fd = 0; fd < anfdmax; ++fd) 1624 for (fd = 0; fd < anfdmax; ++fd)
753 if (anfds [fd].events) 1625 if (anfds [fd].events)
754 { 1626 {
755 anfds [fd].events = 0; 1627 anfds [fd].events = 0;
1628 anfds [fd].emask = 0;
756 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1629 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
757 } 1630 }
758} 1631}
759 1632
760/*****************************************************************************/ 1633/* used to prepare libev internal fd's */
761 1634/* this is not fork-safe */
762/* towards the root */ 1635inline_speed void
763void inline_speed
764upheap (WT *heap, int k)
765{
766 WT w = heap [k];
767
768 for (;;)
769 {
770 int p = k >> 1;
771
772 /* maybe we could use a dummy element at heap [0]? */
773 if (!p || heap [p]->at <= w->at)
774 break;
775
776 heap [k] = heap [p];
777 ev_active (heap [k]) = k;
778 k = p;
779 }
780
781 heap [k] = w;
782 ev_active (heap [k]) = k;
783}
784
785/* away from the root */
786void inline_speed
787downheap (WT *heap, int N, int k)
788{
789 WT w = heap [k];
790
791 for (;;)
792 {
793 int c = k << 1;
794
795 if (c > N)
796 break;
797
798 c += c < N && heap [c]->at > heap [c + 1]->at
799 ? 1 : 0;
800
801 if (w->at <= heap [c]->at)
802 break;
803
804 heap [k] = heap [c];
805 ev_active (heap [k]) = k;
806
807 k = c;
808 }
809
810 heap [k] = w;
811 ev_active (heap [k]) = k;
812}
813
814void inline_size
815adjustheap (WT *heap, int N, int k)
816{
817 upheap (heap, k);
818 downheap (heap, N, k);
819}
820
821/*****************************************************************************/
822
823typedef struct
824{
825 WL head;
826 EV_ATOMIC_T gotsig;
827} ANSIG;
828
829static ANSIG *signals;
830static int signalmax;
831
832static EV_ATOMIC_T gotsig;
833
834void inline_size
835signals_init (ANSIG *base, int count)
836{
837 while (count--)
838 {
839 base->head = 0;
840 base->gotsig = 0;
841
842 ++base;
843 }
844}
845
846/*****************************************************************************/
847
848void inline_speed
849fd_intern (int fd) 1636fd_intern (int fd)
850{ 1637{
851#ifdef _WIN32 1638#ifdef _WIN32
852 int arg = 1; 1639 unsigned long arg = 1;
853 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1640 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
854#else 1641#else
855 fcntl (fd, F_SETFD, FD_CLOEXEC); 1642 fcntl (fd, F_SETFD, FD_CLOEXEC);
856 fcntl (fd, F_SETFL, O_NONBLOCK); 1643 fcntl (fd, F_SETFL, O_NONBLOCK);
857#endif 1644#endif
858} 1645}
859 1646
1647/*****************************************************************************/
1648
1649/*
1650 * the heap functions want a real array index. array index 0 is guaranteed to not
1651 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1652 * the branching factor of the d-tree.
1653 */
1654
1655/*
1656 * at the moment we allow libev the luxury of two heaps,
1657 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1658 * which is more cache-efficient.
1659 * the difference is about 5% with 50000+ watchers.
1660 */
1661#if EV_USE_4HEAP
1662
1663#define DHEAP 4
1664#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1665#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1666#define UPHEAP_DONE(p,k) ((p) == (k))
1667
1668/* away from the root */
1669inline_speed void
1670downheap (ANHE *heap, int N, int k)
1671{
1672 ANHE he = heap [k];
1673 ANHE *E = heap + N + HEAP0;
1674
1675 for (;;)
1676 {
1677 ev_tstamp minat;
1678 ANHE *minpos;
1679 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1680
1681 /* find minimum child */
1682 if (expect_true (pos + DHEAP - 1 < E))
1683 {
1684 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1685 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1686 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1687 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1688 }
1689 else if (pos < E)
1690 {
1691 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1692 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1693 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1694 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1695 }
1696 else
1697 break;
1698
1699 if (ANHE_at (he) <= minat)
1700 break;
1701
1702 heap [k] = *minpos;
1703 ev_active (ANHE_w (*minpos)) = k;
1704
1705 k = minpos - heap;
1706 }
1707
1708 heap [k] = he;
1709 ev_active (ANHE_w (he)) = k;
1710}
1711
1712#else /* 4HEAP */
1713
1714#define HEAP0 1
1715#define HPARENT(k) ((k) >> 1)
1716#define UPHEAP_DONE(p,k) (!(p))
1717
1718/* away from the root */
1719inline_speed void
1720downheap (ANHE *heap, int N, int k)
1721{
1722 ANHE he = heap [k];
1723
1724 for (;;)
1725 {
1726 int c = k << 1;
1727
1728 if (c >= N + HEAP0)
1729 break;
1730
1731 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1732 ? 1 : 0;
1733
1734 if (ANHE_at (he) <= ANHE_at (heap [c]))
1735 break;
1736
1737 heap [k] = heap [c];
1738 ev_active (ANHE_w (heap [k])) = k;
1739
1740 k = c;
1741 }
1742
1743 heap [k] = he;
1744 ev_active (ANHE_w (he)) = k;
1745}
1746#endif
1747
1748/* towards the root */
1749inline_speed void
1750upheap (ANHE *heap, int k)
1751{
1752 ANHE he = heap [k];
1753
1754 for (;;)
1755 {
1756 int p = HPARENT (k);
1757
1758 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1759 break;
1760
1761 heap [k] = heap [p];
1762 ev_active (ANHE_w (heap [k])) = k;
1763 k = p;
1764 }
1765
1766 heap [k] = he;
1767 ev_active (ANHE_w (he)) = k;
1768}
1769
1770/* move an element suitably so it is in a correct place */
1771inline_size void
1772adjustheap (ANHE *heap, int N, int k)
1773{
1774 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1775 upheap (heap, k);
1776 else
1777 downheap (heap, N, k);
1778}
1779
1780/* rebuild the heap: this function is used only once and executed rarely */
1781inline_size void
1782reheap (ANHE *heap, int N)
1783{
1784 int i;
1785
1786 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1787 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1788 for (i = 0; i < N; ++i)
1789 upheap (heap, i + HEAP0);
1790}
1791
1792/*****************************************************************************/
1793
1794/* associate signal watchers to a signal signal */
1795typedef struct
1796{
1797 EV_ATOMIC_T pending;
1798#if EV_MULTIPLICITY
1799 EV_P;
1800#endif
1801 WL head;
1802} ANSIG;
1803
1804static ANSIG signals [EV_NSIG - 1];
1805
1806/*****************************************************************************/
1807
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809
860static void noinline 1810static void noinline ecb_cold
861evpipe_init (EV_P) 1811evpipe_init (EV_P)
862{ 1812{
863 if (!ev_is_active (&pipeev)) 1813 if (!ev_is_active (&pipe_w))
864 { 1814 {
865#if EV_USE_EVENTFD 1815# if EV_USE_EVENTFD
1816 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1817 if (evfd < 0 && errno == EINVAL)
866 if ((evfd = eventfd (0, 0)) >= 0) 1818 evfd = eventfd (0, 0);
1819
1820 if (evfd >= 0)
867 { 1821 {
868 evpipe [0] = -1; 1822 evpipe [0] = -1;
869 fd_intern (evfd); 1823 fd_intern (evfd); /* doing it twice doesn't hurt */
870 ev_io_set (&pipeev, evfd, EV_READ); 1824 ev_io_set (&pipe_w, evfd, EV_READ);
871 } 1825 }
872 else 1826 else
873#endif 1827# endif
874 { 1828 {
875 while (pipe (evpipe)) 1829 while (pipe (evpipe))
876 syserr ("(libev) error creating signal/async pipe"); 1830 ev_syserr ("(libev) error creating signal/async pipe");
877 1831
878 fd_intern (evpipe [0]); 1832 fd_intern (evpipe [0]);
879 fd_intern (evpipe [1]); 1833 fd_intern (evpipe [1]);
880 ev_io_set (&pipeev, evpipe [0], EV_READ); 1834 ev_io_set (&pipe_w, evpipe [0], EV_READ);
881 } 1835 }
882 1836
883 ev_io_start (EV_A_ &pipeev); 1837 ev_io_start (EV_A_ &pipe_w);
884 ev_unref (EV_A); /* watcher should not keep loop alive */ 1838 ev_unref (EV_A); /* watcher should not keep loop alive */
885 } 1839 }
886} 1840}
887 1841
888void inline_size 1842inline_speed void
889evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1843evpipe_write (EV_P_ EV_ATOMIC_T *flag)
890{ 1844{
891 if (!*flag) 1845 if (expect_true (*flag))
1846 return;
1847
1848 *flag = 1;
1849
1850 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1851
1852 pipe_write_skipped = 1;
1853
1854 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1855
1856 if (pipe_write_wanted)
892 { 1857 {
1858 int old_errno;
1859
1860 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1861
893 int old_errno = errno; /* save errno because write might clobber it */ 1862 old_errno = errno; /* save errno because write will clobber it */
894
895 *flag = 1;
896 1863
897#if EV_USE_EVENTFD 1864#if EV_USE_EVENTFD
898 if (evfd >= 0) 1865 if (evfd >= 0)
899 { 1866 {
900 uint64_t counter = 1; 1867 uint64_t counter = 1;
901 write (evfd, &counter, sizeof (uint64_t)); 1868 write (evfd, &counter, sizeof (uint64_t));
902 } 1869 }
903 else 1870 else
904#endif 1871#endif
1872 {
1873 /* win32 people keep sending patches that change this write() to send() */
1874 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1875 /* so when you think this write should be a send instead, please find out */
1876 /* where your send() is from - it's definitely not the microsoft send, and */
1877 /* tell me. thank you. */
1878 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1879 /* check the ev documentation on how to use this flag */
905 write (evpipe [1], &old_errno, 1); 1880 write (evpipe [1], &(evpipe [1]), 1);
1881 }
906 1882
907 errno = old_errno; 1883 errno = old_errno;
908 } 1884 }
909} 1885}
910 1886
1887/* called whenever the libev signal pipe */
1888/* got some events (signal, async) */
911static void 1889static void
912pipecb (EV_P_ ev_io *iow, int revents) 1890pipecb (EV_P_ ev_io *iow, int revents)
913{ 1891{
1892 int i;
1893
1894 if (revents & EV_READ)
1895 {
914#if EV_USE_EVENTFD 1896#if EV_USE_EVENTFD
915 if (evfd >= 0) 1897 if (evfd >= 0)
916 { 1898 {
917 uint64_t counter = 1; 1899 uint64_t counter;
918 read (evfd, &counter, sizeof (uint64_t)); 1900 read (evfd, &counter, sizeof (uint64_t));
919 } 1901 }
920 else 1902 else
921#endif 1903#endif
922 { 1904 {
923 char dummy; 1905 char dummy;
1906 /* see discussion in evpipe_write when you think this read should be recv in win32 */
924 read (evpipe [0], &dummy, 1); 1907 read (evpipe [0], &dummy, 1);
1908 }
1909 }
1910
1911 pipe_write_skipped = 0;
1912
1913#if EV_SIGNAL_ENABLE
1914 if (sig_pending)
925 } 1915 {
1916 sig_pending = 0;
926 1917
927 if (gotsig && ev_is_default_loop (EV_A)) 1918 for (i = EV_NSIG - 1; i--; )
928 { 1919 if (expect_false (signals [i].pending))
929 int signum;
930 gotsig = 0;
931
932 for (signum = signalmax; signum--; )
933 if (signals [signum].gotsig)
934 ev_feed_signal_event (EV_A_ signum + 1); 1920 ev_feed_signal_event (EV_A_ i + 1);
935 } 1921 }
1922#endif
936 1923
937#if EV_ASYNC_ENABLE 1924#if EV_ASYNC_ENABLE
938 if (gotasync) 1925 if (async_pending)
939 { 1926 {
940 int i; 1927 async_pending = 0;
941 gotasync = 0;
942 1928
943 for (i = asynccnt; i--; ) 1929 for (i = asynccnt; i--; )
944 if (asyncs [i]->sent) 1930 if (asyncs [i]->sent)
945 { 1931 {
946 asyncs [i]->sent = 0; 1932 asyncs [i]->sent = 0;
… …
950#endif 1936#endif
951} 1937}
952 1938
953/*****************************************************************************/ 1939/*****************************************************************************/
954 1940
1941void
1942ev_feed_signal (int signum)
1943{
1944#if EV_MULTIPLICITY
1945 EV_P = signals [signum - 1].loop;
1946
1947 if (!EV_A)
1948 return;
1949#endif
1950
1951 if (!ev_active (&pipe_w))
1952 return;
1953
1954 signals [signum - 1].pending = 1;
1955 evpipe_write (EV_A_ &sig_pending);
1956}
1957
955static void 1958static void
956ev_sighandler (int signum) 1959ev_sighandler (int signum)
957{ 1960{
958#if EV_MULTIPLICITY
959 struct ev_loop *loop = &default_loop_struct;
960#endif
961
962#if _WIN32 1961#ifdef _WIN32
963 signal (signum, ev_sighandler); 1962 signal (signum, ev_sighandler);
964#endif 1963#endif
965 1964
966 signals [signum - 1].gotsig = 1; 1965 ev_feed_signal (signum);
967 evpipe_write (EV_A_ &gotsig);
968} 1966}
969 1967
970void noinline 1968void noinline
971ev_feed_signal_event (EV_P_ int signum) 1969ev_feed_signal_event (EV_P_ int signum)
972{ 1970{
973 WL w; 1971 WL w;
974 1972
1973 if (expect_false (signum <= 0 || signum > EV_NSIG))
1974 return;
1975
1976 --signum;
1977
975#if EV_MULTIPLICITY 1978#if EV_MULTIPLICITY
976 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1979 /* it is permissible to try to feed a signal to the wrong loop */
977#endif 1980 /* or, likely more useful, feeding a signal nobody is waiting for */
978 1981
979 --signum; 1982 if (expect_false (signals [signum].loop != EV_A))
980
981 if (signum < 0 || signum >= signalmax)
982 return; 1983 return;
1984#endif
983 1985
984 signals [signum].gotsig = 0; 1986 signals [signum].pending = 0;
985 1987
986 for (w = signals [signum].head; w; w = w->next) 1988 for (w = signals [signum].head; w; w = w->next)
987 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1989 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
988} 1990}
989 1991
1992#if EV_USE_SIGNALFD
1993static void
1994sigfdcb (EV_P_ ev_io *iow, int revents)
1995{
1996 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1997
1998 for (;;)
1999 {
2000 ssize_t res = read (sigfd, si, sizeof (si));
2001
2002 /* not ISO-C, as res might be -1, but works with SuS */
2003 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2004 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2005
2006 if (res < (ssize_t)sizeof (si))
2007 break;
2008 }
2009}
2010#endif
2011
2012#endif
2013
990/*****************************************************************************/ 2014/*****************************************************************************/
991 2015
2016#if EV_CHILD_ENABLE
992static WL childs [EV_PID_HASHSIZE]; 2017static WL childs [EV_PID_HASHSIZE];
993
994#ifndef _WIN32
995 2018
996static ev_signal childev; 2019static ev_signal childev;
997 2020
998#ifndef WIFCONTINUED 2021#ifndef WIFCONTINUED
999# define WIFCONTINUED(status) 0 2022# define WIFCONTINUED(status) 0
1000#endif 2023#endif
1001 2024
1002void inline_speed 2025/* handle a single child status event */
2026inline_speed void
1003child_reap (EV_P_ int chain, int pid, int status) 2027child_reap (EV_P_ int chain, int pid, int status)
1004{ 2028{
1005 ev_child *w; 2029 ev_child *w;
1006 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2030 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1007 2031
1008 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2032 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1009 { 2033 {
1010 if ((w->pid == pid || !w->pid) 2034 if ((w->pid == pid || !w->pid)
1011 && (!traced || (w->flags & 1))) 2035 && (!traced || (w->flags & 1)))
1012 { 2036 {
1013 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2037 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1020 2044
1021#ifndef WCONTINUED 2045#ifndef WCONTINUED
1022# define WCONTINUED 0 2046# define WCONTINUED 0
1023#endif 2047#endif
1024 2048
2049/* called on sigchld etc., calls waitpid */
1025static void 2050static void
1026childcb (EV_P_ ev_signal *sw, int revents) 2051childcb (EV_P_ ev_signal *sw, int revents)
1027{ 2052{
1028 int pid, status; 2053 int pid, status;
1029 2054
… …
1037 /* make sure we are called again until all children have been reaped */ 2062 /* make sure we are called again until all children have been reaped */
1038 /* we need to do it this way so that the callback gets called before we continue */ 2063 /* we need to do it this way so that the callback gets called before we continue */
1039 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2064 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1040 2065
1041 child_reap (EV_A_ pid, pid, status); 2066 child_reap (EV_A_ pid, pid, status);
1042 if (EV_PID_HASHSIZE > 1) 2067 if ((EV_PID_HASHSIZE) > 1)
1043 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2068 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1044} 2069}
1045 2070
1046#endif 2071#endif
1047 2072
1048/*****************************************************************************/ 2073/*****************************************************************************/
1049 2074
2075#if EV_USE_IOCP
2076# include "ev_iocp.c"
2077#endif
1050#if EV_USE_PORT 2078#if EV_USE_PORT
1051# include "ev_port.c" 2079# include "ev_port.c"
1052#endif 2080#endif
1053#if EV_USE_KQUEUE 2081#if EV_USE_KQUEUE
1054# include "ev_kqueue.c" 2082# include "ev_kqueue.c"
… …
1061#endif 2089#endif
1062#if EV_USE_SELECT 2090#if EV_USE_SELECT
1063# include "ev_select.c" 2091# include "ev_select.c"
1064#endif 2092#endif
1065 2093
1066int 2094int ecb_cold
1067ev_version_major (void) 2095ev_version_major (void)
1068{ 2096{
1069 return EV_VERSION_MAJOR; 2097 return EV_VERSION_MAJOR;
1070} 2098}
1071 2099
1072int 2100int ecb_cold
1073ev_version_minor (void) 2101ev_version_minor (void)
1074{ 2102{
1075 return EV_VERSION_MINOR; 2103 return EV_VERSION_MINOR;
1076} 2104}
1077 2105
1078/* return true if we are running with elevated privileges and should ignore env variables */ 2106/* return true if we are running with elevated privileges and should ignore env variables */
1079int inline_size 2107int inline_size ecb_cold
1080enable_secure (void) 2108enable_secure (void)
1081{ 2109{
1082#ifdef _WIN32 2110#ifdef _WIN32
1083 return 0; 2111 return 0;
1084#else 2112#else
1085 return getuid () != geteuid () 2113 return getuid () != geteuid ()
1086 || getgid () != getegid (); 2114 || getgid () != getegid ();
1087#endif 2115#endif
1088} 2116}
1089 2117
1090unsigned int 2118unsigned int ecb_cold
1091ev_supported_backends (void) 2119ev_supported_backends (void)
1092{ 2120{
1093 unsigned int flags = 0; 2121 unsigned int flags = 0;
1094 2122
1095 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2123 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1099 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2127 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1100 2128
1101 return flags; 2129 return flags;
1102} 2130}
1103 2131
1104unsigned int 2132unsigned int ecb_cold
1105ev_recommended_backends (void) 2133ev_recommended_backends (void)
1106{ 2134{
1107 unsigned int flags = ev_supported_backends (); 2135 unsigned int flags = ev_supported_backends ();
1108 2136
1109#ifndef __NetBSD__ 2137#ifndef __NetBSD__
1110 /* kqueue is borked on everything but netbsd apparently */ 2138 /* kqueue is borked on everything but netbsd apparently */
1111 /* it usually doesn't work correctly on anything but sockets and pipes */ 2139 /* it usually doesn't work correctly on anything but sockets and pipes */
1112 flags &= ~EVBACKEND_KQUEUE; 2140 flags &= ~EVBACKEND_KQUEUE;
1113#endif 2141#endif
1114#ifdef __APPLE__ 2142#ifdef __APPLE__
1115 // flags &= ~EVBACKEND_KQUEUE; for documentation 2143 /* only select works correctly on that "unix-certified" platform */
1116 flags &= ~EVBACKEND_POLL; 2144 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2145 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2146#endif
2147#ifdef __FreeBSD__
2148 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1117#endif 2149#endif
1118 2150
1119 return flags; 2151 return flags;
1120} 2152}
1121 2153
1122unsigned int 2154unsigned int ecb_cold
1123ev_embeddable_backends (void) 2155ev_embeddable_backends (void)
1124{ 2156{
1125 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2157 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1126 2158
1127 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2159 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1128 /* please fix it and tell me how to detect the fix */ 2160 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1129 flags &= ~EVBACKEND_EPOLL; 2161 flags &= ~EVBACKEND_EPOLL;
1130 2162
1131 return flags; 2163 return flags;
1132} 2164}
1133 2165
1134unsigned int 2166unsigned int
1135ev_backend (EV_P) 2167ev_backend (EV_P)
1136{ 2168{
1137 return backend; 2169 return backend;
1138} 2170}
1139 2171
2172#if EV_FEATURE_API
1140unsigned int 2173unsigned int
1141ev_loop_count (EV_P) 2174ev_iteration (EV_P)
1142{ 2175{
1143 return loop_count; 2176 return loop_count;
2177}
2178
2179unsigned int
2180ev_depth (EV_P)
2181{
2182 return loop_depth;
1144} 2183}
1145 2184
1146void 2185void
1147ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2186ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1148{ 2187{
… …
1153ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2192ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1154{ 2193{
1155 timeout_blocktime = interval; 2194 timeout_blocktime = interval;
1156} 2195}
1157 2196
2197void
2198ev_set_userdata (EV_P_ void *data)
2199{
2200 userdata = data;
2201}
2202
2203void *
2204ev_userdata (EV_P)
2205{
2206 return userdata;
2207}
2208
2209void
2210ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2211{
2212 invoke_cb = invoke_pending_cb;
2213}
2214
2215void
2216ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2217{
2218 release_cb = release;
2219 acquire_cb = acquire;
2220}
2221#endif
2222
2223/* initialise a loop structure, must be zero-initialised */
1158static void noinline 2224static void noinline ecb_cold
1159loop_init (EV_P_ unsigned int flags) 2225loop_init (EV_P_ unsigned int flags)
1160{ 2226{
1161 if (!backend) 2227 if (!backend)
1162 { 2228 {
2229 origflags = flags;
2230
2231#if EV_USE_REALTIME
2232 if (!have_realtime)
2233 {
2234 struct timespec ts;
2235
2236 if (!clock_gettime (CLOCK_REALTIME, &ts))
2237 have_realtime = 1;
2238 }
2239#endif
2240
1163#if EV_USE_MONOTONIC 2241#if EV_USE_MONOTONIC
2242 if (!have_monotonic)
1164 { 2243 {
1165 struct timespec ts; 2244 struct timespec ts;
2245
1166 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2246 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1167 have_monotonic = 1; 2247 have_monotonic = 1;
1168 } 2248 }
1169#endif
1170
1171 ev_rt_now = ev_time ();
1172 mn_now = get_clock ();
1173 now_floor = mn_now;
1174 rtmn_diff = ev_rt_now - mn_now;
1175
1176 io_blocktime = 0.;
1177 timeout_blocktime = 0.;
1178 backend = 0;
1179 backend_fd = -1;
1180 gotasync = 0;
1181#if EV_USE_INOTIFY
1182 fs_fd = -2;
1183#endif 2249#endif
1184 2250
1185 /* pid check not overridable via env */ 2251 /* pid check not overridable via env */
1186#ifndef _WIN32 2252#ifndef _WIN32
1187 if (flags & EVFLAG_FORKCHECK) 2253 if (flags & EVFLAG_FORKCHECK)
… …
1191 if (!(flags & EVFLAG_NOENV) 2257 if (!(flags & EVFLAG_NOENV)
1192 && !enable_secure () 2258 && !enable_secure ()
1193 && getenv ("LIBEV_FLAGS")) 2259 && getenv ("LIBEV_FLAGS"))
1194 flags = atoi (getenv ("LIBEV_FLAGS")); 2260 flags = atoi (getenv ("LIBEV_FLAGS"));
1195 2261
1196 if (!(flags & 0x0000ffffU)) 2262 ev_rt_now = ev_time ();
2263 mn_now = get_clock ();
2264 now_floor = mn_now;
2265 rtmn_diff = ev_rt_now - mn_now;
2266#if EV_FEATURE_API
2267 invoke_cb = ev_invoke_pending;
2268#endif
2269
2270 io_blocktime = 0.;
2271 timeout_blocktime = 0.;
2272 backend = 0;
2273 backend_fd = -1;
2274 sig_pending = 0;
2275#if EV_ASYNC_ENABLE
2276 async_pending = 0;
2277#endif
2278 pipe_write_skipped = 0;
2279 pipe_write_wanted = 0;
2280#if EV_USE_INOTIFY
2281 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2282#endif
2283#if EV_USE_SIGNALFD
2284 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2285#endif
2286
2287 if (!(flags & EVBACKEND_MASK))
1197 flags |= ev_recommended_backends (); 2288 flags |= ev_recommended_backends ();
1198 2289
2290#if EV_USE_IOCP
2291 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2292#endif
1199#if EV_USE_PORT 2293#if EV_USE_PORT
1200 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2294 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1201#endif 2295#endif
1202#if EV_USE_KQUEUE 2296#if EV_USE_KQUEUE
1203 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2297 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1210#endif 2304#endif
1211#if EV_USE_SELECT 2305#if EV_USE_SELECT
1212 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2306 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1213#endif 2307#endif
1214 2308
2309 ev_prepare_init (&pending_w, pendingcb);
2310
2311#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1215 ev_init (&pipeev, pipecb); 2312 ev_init (&pipe_w, pipecb);
1216 ev_set_priority (&pipeev, EV_MAXPRI); 2313 ev_set_priority (&pipe_w, EV_MAXPRI);
2314#endif
1217 } 2315 }
1218} 2316}
1219 2317
1220static void noinline 2318/* free up a loop structure */
2319void ecb_cold
1221loop_destroy (EV_P) 2320ev_loop_destroy (EV_P)
1222{ 2321{
1223 int i; 2322 int i;
1224 2323
2324#if EV_MULTIPLICITY
2325 /* mimic free (0) */
2326 if (!EV_A)
2327 return;
2328#endif
2329
2330#if EV_CLEANUP_ENABLE
2331 /* queue cleanup watchers (and execute them) */
2332 if (expect_false (cleanupcnt))
2333 {
2334 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2335 EV_INVOKE_PENDING;
2336 }
2337#endif
2338
2339#if EV_CHILD_ENABLE
2340 if (ev_is_active (&childev))
2341 {
2342 ev_ref (EV_A); /* child watcher */
2343 ev_signal_stop (EV_A_ &childev);
2344 }
2345#endif
2346
1225 if (ev_is_active (&pipeev)) 2347 if (ev_is_active (&pipe_w))
1226 { 2348 {
1227 ev_ref (EV_A); /* signal watcher */ 2349 /*ev_ref (EV_A);*/
1228 ev_io_stop (EV_A_ &pipeev); 2350 /*ev_io_stop (EV_A_ &pipe_w);*/
1229 2351
1230#if EV_USE_EVENTFD 2352#if EV_USE_EVENTFD
1231 if (evfd >= 0) 2353 if (evfd >= 0)
1232 close (evfd); 2354 close (evfd);
1233#endif 2355#endif
1234 2356
1235 if (evpipe [0] >= 0) 2357 if (evpipe [0] >= 0)
1236 { 2358 {
1237 close (evpipe [0]); 2359 EV_WIN32_CLOSE_FD (evpipe [0]);
1238 close (evpipe [1]); 2360 EV_WIN32_CLOSE_FD (evpipe [1]);
1239 } 2361 }
1240 } 2362 }
2363
2364#if EV_USE_SIGNALFD
2365 if (ev_is_active (&sigfd_w))
2366 close (sigfd);
2367#endif
1241 2368
1242#if EV_USE_INOTIFY 2369#if EV_USE_INOTIFY
1243 if (fs_fd >= 0) 2370 if (fs_fd >= 0)
1244 close (fs_fd); 2371 close (fs_fd);
1245#endif 2372#endif
1246 2373
1247 if (backend_fd >= 0) 2374 if (backend_fd >= 0)
1248 close (backend_fd); 2375 close (backend_fd);
1249 2376
2377#if EV_USE_IOCP
2378 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2379#endif
1250#if EV_USE_PORT 2380#if EV_USE_PORT
1251 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2381 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1252#endif 2382#endif
1253#if EV_USE_KQUEUE 2383#if EV_USE_KQUEUE
1254 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2384 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1269#if EV_IDLE_ENABLE 2399#if EV_IDLE_ENABLE
1270 array_free (idle, [i]); 2400 array_free (idle, [i]);
1271#endif 2401#endif
1272 } 2402 }
1273 2403
1274 ev_free (anfds); anfdmax = 0; 2404 ev_free (anfds); anfds = 0; anfdmax = 0;
1275 2405
1276 /* have to use the microsoft-never-gets-it-right macro */ 2406 /* have to use the microsoft-never-gets-it-right macro */
2407 array_free (rfeed, EMPTY);
1277 array_free (fdchange, EMPTY); 2408 array_free (fdchange, EMPTY);
1278 array_free (timer, EMPTY); 2409 array_free (timer, EMPTY);
1279#if EV_PERIODIC_ENABLE 2410#if EV_PERIODIC_ENABLE
1280 array_free (periodic, EMPTY); 2411 array_free (periodic, EMPTY);
1281#endif 2412#endif
1282#if EV_FORK_ENABLE 2413#if EV_FORK_ENABLE
1283 array_free (fork, EMPTY); 2414 array_free (fork, EMPTY);
1284#endif 2415#endif
2416#if EV_CLEANUP_ENABLE
2417 array_free (cleanup, EMPTY);
2418#endif
1285 array_free (prepare, EMPTY); 2419 array_free (prepare, EMPTY);
1286 array_free (check, EMPTY); 2420 array_free (check, EMPTY);
1287#if EV_ASYNC_ENABLE 2421#if EV_ASYNC_ENABLE
1288 array_free (async, EMPTY); 2422 array_free (async, EMPTY);
1289#endif 2423#endif
1290 2424
1291 backend = 0; 2425 backend = 0;
2426
2427#if EV_MULTIPLICITY
2428 if (ev_is_default_loop (EV_A))
2429#endif
2430 ev_default_loop_ptr = 0;
2431#if EV_MULTIPLICITY
2432 else
2433 ev_free (EV_A);
2434#endif
1292} 2435}
1293 2436
1294#if EV_USE_INOTIFY 2437#if EV_USE_INOTIFY
1295void inline_size infy_fork (EV_P); 2438inline_size void infy_fork (EV_P);
1296#endif 2439#endif
1297 2440
1298void inline_size 2441inline_size void
1299loop_fork (EV_P) 2442loop_fork (EV_P)
1300{ 2443{
1301#if EV_USE_PORT 2444#if EV_USE_PORT
1302 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2445 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1303#endif 2446#endif
… …
1309#endif 2452#endif
1310#if EV_USE_INOTIFY 2453#if EV_USE_INOTIFY
1311 infy_fork (EV_A); 2454 infy_fork (EV_A);
1312#endif 2455#endif
1313 2456
1314 if (ev_is_active (&pipeev)) 2457 if (ev_is_active (&pipe_w))
1315 { 2458 {
1316 /* this "locks" the handlers against writing to the pipe */ 2459 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1317 /* while we modify the fd vars */
1318 gotsig = 1;
1319#if EV_ASYNC_ENABLE
1320 gotasync = 1;
1321#endif
1322 2460
1323 ev_ref (EV_A); 2461 ev_ref (EV_A);
1324 ev_io_stop (EV_A_ &pipeev); 2462 ev_io_stop (EV_A_ &pipe_w);
1325 2463
1326#if EV_USE_EVENTFD 2464#if EV_USE_EVENTFD
1327 if (evfd >= 0) 2465 if (evfd >= 0)
1328 close (evfd); 2466 close (evfd);
1329#endif 2467#endif
1330 2468
1331 if (evpipe [0] >= 0) 2469 if (evpipe [0] >= 0)
1332 { 2470 {
1333 close (evpipe [0]); 2471 EV_WIN32_CLOSE_FD (evpipe [0]);
1334 close (evpipe [1]); 2472 EV_WIN32_CLOSE_FD (evpipe [1]);
1335 } 2473 }
1336 2474
2475#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1337 evpipe_init (EV_A); 2476 evpipe_init (EV_A);
1338 /* now iterate over everything, in case we missed something */ 2477 /* now iterate over everything, in case we missed something */
1339 pipecb (EV_A_ &pipeev, EV_READ); 2478 pipecb (EV_A_ &pipe_w, EV_READ);
2479#endif
1340 } 2480 }
1341 2481
1342 postfork = 0; 2482 postfork = 0;
1343} 2483}
1344 2484
1345#if EV_MULTIPLICITY 2485#if EV_MULTIPLICITY
2486
1346struct ev_loop * 2487struct ev_loop * ecb_cold
1347ev_loop_new (unsigned int flags) 2488ev_loop_new (unsigned int flags)
1348{ 2489{
1349 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2490 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1350 2491
1351 memset (loop, 0, sizeof (struct ev_loop)); 2492 memset (EV_A, 0, sizeof (struct ev_loop));
1352
1353 loop_init (EV_A_ flags); 2493 loop_init (EV_A_ flags);
1354 2494
1355 if (ev_backend (EV_A)) 2495 if (ev_backend (EV_A))
1356 return loop; 2496 return EV_A;
1357 2497
2498 ev_free (EV_A);
1358 return 0; 2499 return 0;
1359} 2500}
1360 2501
1361void 2502#endif /* multiplicity */
1362ev_loop_destroy (EV_P)
1363{
1364 loop_destroy (EV_A);
1365 ev_free (loop);
1366}
1367 2503
1368void 2504#if EV_VERIFY
1369ev_loop_fork (EV_P) 2505static void noinline ecb_cold
2506verify_watcher (EV_P_ W w)
1370{ 2507{
1371 postfork = 1; /* must be in line with ev_default_fork */ 2508 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1372}
1373 2509
2510 if (w->pending)
2511 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2512}
2513
2514static void noinline ecb_cold
2515verify_heap (EV_P_ ANHE *heap, int N)
2516{
2517 int i;
2518
2519 for (i = HEAP0; i < N + HEAP0; ++i)
2520 {
2521 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2522 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2523 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2524
2525 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2526 }
2527}
2528
2529static void noinline ecb_cold
2530array_verify (EV_P_ W *ws, int cnt)
2531{
2532 while (cnt--)
2533 {
2534 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2535 verify_watcher (EV_A_ ws [cnt]);
2536 }
2537}
2538#endif
2539
2540#if EV_FEATURE_API
2541void ecb_cold
2542ev_verify (EV_P)
2543{
2544#if EV_VERIFY
2545 int i;
2546 WL w;
2547
2548 assert (activecnt >= -1);
2549
2550 assert (fdchangemax >= fdchangecnt);
2551 for (i = 0; i < fdchangecnt; ++i)
2552 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2553
2554 assert (anfdmax >= 0);
2555 for (i = 0; i < anfdmax; ++i)
2556 for (w = anfds [i].head; w; w = w->next)
2557 {
2558 verify_watcher (EV_A_ (W)w);
2559 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2560 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2561 }
2562
2563 assert (timermax >= timercnt);
2564 verify_heap (EV_A_ timers, timercnt);
2565
2566#if EV_PERIODIC_ENABLE
2567 assert (periodicmax >= periodiccnt);
2568 verify_heap (EV_A_ periodics, periodiccnt);
2569#endif
2570
2571 for (i = NUMPRI; i--; )
2572 {
2573 assert (pendingmax [i] >= pendingcnt [i]);
2574#if EV_IDLE_ENABLE
2575 assert (idleall >= 0);
2576 assert (idlemax [i] >= idlecnt [i]);
2577 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2578#endif
2579 }
2580
2581#if EV_FORK_ENABLE
2582 assert (forkmax >= forkcnt);
2583 array_verify (EV_A_ (W *)forks, forkcnt);
2584#endif
2585
2586#if EV_CLEANUP_ENABLE
2587 assert (cleanupmax >= cleanupcnt);
2588 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2589#endif
2590
2591#if EV_ASYNC_ENABLE
2592 assert (asyncmax >= asynccnt);
2593 array_verify (EV_A_ (W *)asyncs, asynccnt);
2594#endif
2595
2596#if EV_PREPARE_ENABLE
2597 assert (preparemax >= preparecnt);
2598 array_verify (EV_A_ (W *)prepares, preparecnt);
2599#endif
2600
2601#if EV_CHECK_ENABLE
2602 assert (checkmax >= checkcnt);
2603 array_verify (EV_A_ (W *)checks, checkcnt);
2604#endif
2605
2606# if 0
2607#if EV_CHILD_ENABLE
2608 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2609 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2610#endif
2611# endif
2612#endif
2613}
1374#endif 2614#endif
1375 2615
1376#if EV_MULTIPLICITY 2616#if EV_MULTIPLICITY
1377struct ev_loop * 2617struct ev_loop * ecb_cold
1378ev_default_loop_init (unsigned int flags)
1379#else 2618#else
1380int 2619int
2620#endif
1381ev_default_loop (unsigned int flags) 2621ev_default_loop (unsigned int flags)
1382#endif
1383{ 2622{
1384 if (!ev_default_loop_ptr) 2623 if (!ev_default_loop_ptr)
1385 { 2624 {
1386#if EV_MULTIPLICITY 2625#if EV_MULTIPLICITY
1387 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2626 EV_P = ev_default_loop_ptr = &default_loop_struct;
1388#else 2627#else
1389 ev_default_loop_ptr = 1; 2628 ev_default_loop_ptr = 1;
1390#endif 2629#endif
1391 2630
1392 loop_init (EV_A_ flags); 2631 loop_init (EV_A_ flags);
1393 2632
1394 if (ev_backend (EV_A)) 2633 if (ev_backend (EV_A))
1395 { 2634 {
1396#ifndef _WIN32 2635#if EV_CHILD_ENABLE
1397 ev_signal_init (&childev, childcb, SIGCHLD); 2636 ev_signal_init (&childev, childcb, SIGCHLD);
1398 ev_set_priority (&childev, EV_MAXPRI); 2637 ev_set_priority (&childev, EV_MAXPRI);
1399 ev_signal_start (EV_A_ &childev); 2638 ev_signal_start (EV_A_ &childev);
1400 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2639 ev_unref (EV_A); /* child watcher should not keep loop alive */
1401#endif 2640#endif
… …
1406 2645
1407 return ev_default_loop_ptr; 2646 return ev_default_loop_ptr;
1408} 2647}
1409 2648
1410void 2649void
1411ev_default_destroy (void) 2650ev_loop_fork (EV_P)
1412{ 2651{
1413#if EV_MULTIPLICITY
1414 struct ev_loop *loop = ev_default_loop_ptr;
1415#endif
1416
1417#ifndef _WIN32
1418 ev_ref (EV_A); /* child watcher */
1419 ev_signal_stop (EV_A_ &childev);
1420#endif
1421
1422 loop_destroy (EV_A);
1423}
1424
1425void
1426ev_default_fork (void)
1427{
1428#if EV_MULTIPLICITY
1429 struct ev_loop *loop = ev_default_loop_ptr;
1430#endif
1431
1432 if (backend)
1433 postfork = 1; /* must be in line with ev_loop_fork */ 2652 postfork = 1; /* must be in line with ev_default_fork */
1434} 2653}
1435 2654
1436/*****************************************************************************/ 2655/*****************************************************************************/
1437 2656
1438void 2657void
1439ev_invoke (EV_P_ void *w, int revents) 2658ev_invoke (EV_P_ void *w, int revents)
1440{ 2659{
1441 EV_CB_INVOKE ((W)w, revents); 2660 EV_CB_INVOKE ((W)w, revents);
1442} 2661}
1443 2662
1444void inline_speed 2663unsigned int
1445call_pending (EV_P) 2664ev_pending_count (EV_P)
2665{
2666 int pri;
2667 unsigned int count = 0;
2668
2669 for (pri = NUMPRI; pri--; )
2670 count += pendingcnt [pri];
2671
2672 return count;
2673}
2674
2675void noinline
2676ev_invoke_pending (EV_P)
1446{ 2677{
1447 int pri; 2678 int pri;
1448 2679
1449 for (pri = NUMPRI; pri--; ) 2680 for (pri = NUMPRI; pri--; )
1450 while (pendingcnt [pri]) 2681 while (pendingcnt [pri])
1451 { 2682 {
1452 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2683 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1453 2684
1454 if (expect_true (p->w))
1455 {
1456 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1457
1458 p->w->pending = 0; 2685 p->w->pending = 0;
1459 EV_CB_INVOKE (p->w, p->events); 2686 EV_CB_INVOKE (p->w, p->events);
1460 } 2687 EV_FREQUENT_CHECK;
1461 } 2688 }
1462} 2689}
1463 2690
1464void inline_size
1465timers_reify (EV_P)
1466{
1467 while (timercnt && ev_at (timers [1]) <= mn_now)
1468 {
1469 ev_timer *w = (ev_timer *)timers [1];
1470
1471 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1472
1473 /* first reschedule or stop timer */
1474 if (w->repeat)
1475 {
1476 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1477
1478 ev_at (w) += w->repeat;
1479 if (ev_at (w) < mn_now)
1480 ev_at (w) = mn_now;
1481
1482 downheap (timers, timercnt, 1);
1483 }
1484 else
1485 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1486
1487 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1488 }
1489}
1490
1491#if EV_PERIODIC_ENABLE
1492void inline_size
1493periodics_reify (EV_P)
1494{
1495 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
1496 {
1497 ev_periodic *w = (ev_periodic *)periodics [1];
1498
1499 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1500
1501 /* first reschedule or stop timer */
1502 if (w->reschedule_cb)
1503 {
1504 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1505 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1506 downheap (periodics, periodiccnt, 1);
1507 }
1508 else if (w->interval)
1509 {
1510 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1511 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1512 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1513 downheap (periodics, periodiccnt, 1);
1514 }
1515 else
1516 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1517
1518 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1519 }
1520}
1521
1522static void noinline
1523periodics_reschedule (EV_P)
1524{
1525 int i;
1526
1527 /* adjust periodics after time jump */
1528 for (i = 0; i < periodiccnt; ++i)
1529 {
1530 ev_periodic *w = (ev_periodic *)periodics [i];
1531
1532 if (w->reschedule_cb)
1533 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1534 else if (w->interval)
1535 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1536 }
1537
1538 /* now rebuild the heap */
1539 for (i = periodiccnt >> 1; i--; )
1540 downheap (periodics, periodiccnt, i);
1541}
1542#endif
1543
1544#if EV_IDLE_ENABLE 2691#if EV_IDLE_ENABLE
1545void inline_size 2692/* make idle watchers pending. this handles the "call-idle */
2693/* only when higher priorities are idle" logic */
2694inline_size void
1546idle_reify (EV_P) 2695idle_reify (EV_P)
1547{ 2696{
1548 if (expect_false (idleall)) 2697 if (expect_false (idleall))
1549 { 2698 {
1550 int pri; 2699 int pri;
… …
1562 } 2711 }
1563 } 2712 }
1564} 2713}
1565#endif 2714#endif
1566 2715
1567void inline_speed 2716/* make timers pending */
2717inline_size void
2718timers_reify (EV_P)
2719{
2720 EV_FREQUENT_CHECK;
2721
2722 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2723 {
2724 do
2725 {
2726 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2727
2728 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2729
2730 /* first reschedule or stop timer */
2731 if (w->repeat)
2732 {
2733 ev_at (w) += w->repeat;
2734 if (ev_at (w) < mn_now)
2735 ev_at (w) = mn_now;
2736
2737 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2738
2739 ANHE_at_cache (timers [HEAP0]);
2740 downheap (timers, timercnt, HEAP0);
2741 }
2742 else
2743 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2744
2745 EV_FREQUENT_CHECK;
2746 feed_reverse (EV_A_ (W)w);
2747 }
2748 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2749
2750 feed_reverse_done (EV_A_ EV_TIMER);
2751 }
2752}
2753
2754#if EV_PERIODIC_ENABLE
2755
2756static void noinline
2757periodic_recalc (EV_P_ ev_periodic *w)
2758{
2759 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2760 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2761
2762 /* the above almost always errs on the low side */
2763 while (at <= ev_rt_now)
2764 {
2765 ev_tstamp nat = at + w->interval;
2766
2767 /* when resolution fails us, we use ev_rt_now */
2768 if (expect_false (nat == at))
2769 {
2770 at = ev_rt_now;
2771 break;
2772 }
2773
2774 at = nat;
2775 }
2776
2777 ev_at (w) = at;
2778}
2779
2780/* make periodics pending */
2781inline_size void
2782periodics_reify (EV_P)
2783{
2784 EV_FREQUENT_CHECK;
2785
2786 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2787 {
2788 int feed_count = 0;
2789
2790 do
2791 {
2792 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2793
2794 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2795
2796 /* first reschedule or stop timer */
2797 if (w->reschedule_cb)
2798 {
2799 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2800
2801 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2802
2803 ANHE_at_cache (periodics [HEAP0]);
2804 downheap (periodics, periodiccnt, HEAP0);
2805 }
2806 else if (w->interval)
2807 {
2808 periodic_recalc (EV_A_ w);
2809 ANHE_at_cache (periodics [HEAP0]);
2810 downheap (periodics, periodiccnt, HEAP0);
2811 }
2812 else
2813 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2814
2815 EV_FREQUENT_CHECK;
2816 feed_reverse (EV_A_ (W)w);
2817 }
2818 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2819
2820 feed_reverse_done (EV_A_ EV_PERIODIC);
2821 }
2822}
2823
2824/* simply recalculate all periodics */
2825/* TODO: maybe ensure that at least one event happens when jumping forward? */
2826static void noinline ecb_cold
2827periodics_reschedule (EV_P)
2828{
2829 int i;
2830
2831 /* adjust periodics after time jump */
2832 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2833 {
2834 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2835
2836 if (w->reschedule_cb)
2837 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2838 else if (w->interval)
2839 periodic_recalc (EV_A_ w);
2840
2841 ANHE_at_cache (periodics [i]);
2842 }
2843
2844 reheap (periodics, periodiccnt);
2845}
2846#endif
2847
2848/* adjust all timers by a given offset */
2849static void noinline ecb_cold
2850timers_reschedule (EV_P_ ev_tstamp adjust)
2851{
2852 int i;
2853
2854 for (i = 0; i < timercnt; ++i)
2855 {
2856 ANHE *he = timers + i + HEAP0;
2857 ANHE_w (*he)->at += adjust;
2858 ANHE_at_cache (*he);
2859 }
2860}
2861
2862/* fetch new monotonic and realtime times from the kernel */
2863/* also detect if there was a timejump, and act accordingly */
2864inline_speed void
1568time_update (EV_P_ ev_tstamp max_block) 2865time_update (EV_P_ ev_tstamp max_block)
1569{ 2866{
1570 int i;
1571
1572#if EV_USE_MONOTONIC 2867#if EV_USE_MONOTONIC
1573 if (expect_true (have_monotonic)) 2868 if (expect_true (have_monotonic))
1574 { 2869 {
2870 int i;
1575 ev_tstamp odiff = rtmn_diff; 2871 ev_tstamp odiff = rtmn_diff;
1576 2872
1577 mn_now = get_clock (); 2873 mn_now = get_clock ();
1578 2874
1579 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2875 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1595 * doesn't hurt either as we only do this on time-jumps or 2891 * doesn't hurt either as we only do this on time-jumps or
1596 * in the unlikely event of having been preempted here. 2892 * in the unlikely event of having been preempted here.
1597 */ 2893 */
1598 for (i = 4; --i; ) 2894 for (i = 4; --i; )
1599 { 2895 {
2896 ev_tstamp diff;
1600 rtmn_diff = ev_rt_now - mn_now; 2897 rtmn_diff = ev_rt_now - mn_now;
1601 2898
1602 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2899 diff = odiff - rtmn_diff;
2900
2901 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1603 return; /* all is well */ 2902 return; /* all is well */
1604 2903
1605 ev_rt_now = ev_time (); 2904 ev_rt_now = ev_time ();
1606 mn_now = get_clock (); 2905 mn_now = get_clock ();
1607 now_floor = mn_now; 2906 now_floor = mn_now;
1608 } 2907 }
1609 2908
2909 /* no timer adjustment, as the monotonic clock doesn't jump */
2910 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1610# if EV_PERIODIC_ENABLE 2911# if EV_PERIODIC_ENABLE
1611 periodics_reschedule (EV_A); 2912 periodics_reschedule (EV_A);
1612# endif 2913# endif
1613 /* no timer adjustment, as the monotonic clock doesn't jump */
1614 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1615 } 2914 }
1616 else 2915 else
1617#endif 2916#endif
1618 { 2917 {
1619 ev_rt_now = ev_time (); 2918 ev_rt_now = ev_time ();
1620 2919
1621 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2920 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1622 { 2921 {
2922 /* adjust timers. this is easy, as the offset is the same for all of them */
2923 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1623#if EV_PERIODIC_ENABLE 2924#if EV_PERIODIC_ENABLE
1624 periodics_reschedule (EV_A); 2925 periodics_reschedule (EV_A);
1625#endif 2926#endif
1626 /* adjust timers. this is easy, as the offset is the same for all of them */
1627 for (i = 1; i <= timercnt; ++i)
1628 ev_at (timers [i]) += ev_rt_now - mn_now;
1629 } 2927 }
1630 2928
1631 mn_now = ev_rt_now; 2929 mn_now = ev_rt_now;
1632 } 2930 }
1633} 2931}
1634 2932
1635void 2933void
1636ev_ref (EV_P)
1637{
1638 ++activecnt;
1639}
1640
1641void
1642ev_unref (EV_P)
1643{
1644 --activecnt;
1645}
1646
1647static int loop_done;
1648
1649void
1650ev_loop (EV_P_ int flags) 2934ev_run (EV_P_ int flags)
1651{ 2935{
2936#if EV_FEATURE_API
2937 ++loop_depth;
2938#endif
2939
2940 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2941
1652 loop_done = EVUNLOOP_CANCEL; 2942 loop_done = EVBREAK_CANCEL;
1653 2943
1654 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2944 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1655 2945
1656 do 2946 do
1657 { 2947 {
2948#if EV_VERIFY >= 2
2949 ev_verify (EV_A);
2950#endif
2951
1658#ifndef _WIN32 2952#ifndef _WIN32
1659 if (expect_false (curpid)) /* penalise the forking check even more */ 2953 if (expect_false (curpid)) /* penalise the forking check even more */
1660 if (expect_false (getpid () != curpid)) 2954 if (expect_false (getpid () != curpid))
1661 { 2955 {
1662 curpid = getpid (); 2956 curpid = getpid ();
… …
1668 /* we might have forked, so queue fork handlers */ 2962 /* we might have forked, so queue fork handlers */
1669 if (expect_false (postfork)) 2963 if (expect_false (postfork))
1670 if (forkcnt) 2964 if (forkcnt)
1671 { 2965 {
1672 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2966 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1673 call_pending (EV_A); 2967 EV_INVOKE_PENDING;
1674 } 2968 }
1675#endif 2969#endif
1676 2970
2971#if EV_PREPARE_ENABLE
1677 /* queue prepare watchers (and execute them) */ 2972 /* queue prepare watchers (and execute them) */
1678 if (expect_false (preparecnt)) 2973 if (expect_false (preparecnt))
1679 { 2974 {
1680 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2975 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1681 call_pending (EV_A); 2976 EV_INVOKE_PENDING;
1682 } 2977 }
2978#endif
1683 2979
1684 if (expect_false (!activecnt)) 2980 if (expect_false (loop_done))
1685 break; 2981 break;
1686 2982
1687 /* we might have forked, so reify kernel state if necessary */ 2983 /* we might have forked, so reify kernel state if necessary */
1688 if (expect_false (postfork)) 2984 if (expect_false (postfork))
1689 loop_fork (EV_A); 2985 loop_fork (EV_A);
… …
1694 /* calculate blocking time */ 2990 /* calculate blocking time */
1695 { 2991 {
1696 ev_tstamp waittime = 0.; 2992 ev_tstamp waittime = 0.;
1697 ev_tstamp sleeptime = 0.; 2993 ev_tstamp sleeptime = 0.;
1698 2994
2995 /* remember old timestamp for io_blocktime calculation */
2996 ev_tstamp prev_mn_now = mn_now;
2997
2998 /* update time to cancel out callback processing overhead */
2999 time_update (EV_A_ 1e100);
3000
3001 /* from now on, we want a pipe-wake-up */
3002 pipe_write_wanted = 1;
3003
3004 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3005
1699 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3006 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1700 { 3007 {
1701 /* update time to cancel out callback processing overhead */
1702 time_update (EV_A_ 1e100);
1703
1704 waittime = MAX_BLOCKTIME; 3008 waittime = MAX_BLOCKTIME;
1705 3009
1706 if (timercnt) 3010 if (timercnt)
1707 { 3011 {
1708 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge; 3012 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1709 if (waittime > to) waittime = to; 3013 if (waittime > to) waittime = to;
1710 } 3014 }
1711 3015
1712#if EV_PERIODIC_ENABLE 3016#if EV_PERIODIC_ENABLE
1713 if (periodiccnt) 3017 if (periodiccnt)
1714 { 3018 {
1715 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge; 3019 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1716 if (waittime > to) waittime = to; 3020 if (waittime > to) waittime = to;
1717 } 3021 }
1718#endif 3022#endif
1719 3023
3024 /* don't let timeouts decrease the waittime below timeout_blocktime */
1720 if (expect_false (waittime < timeout_blocktime)) 3025 if (expect_false (waittime < timeout_blocktime))
1721 waittime = timeout_blocktime; 3026 waittime = timeout_blocktime;
1722 3027
1723 sleeptime = waittime - backend_fudge; 3028 /* at this point, we NEED to wait, so we have to ensure */
3029 /* to pass a minimum nonzero value to the backend */
3030 if (expect_false (waittime < backend_mintime))
3031 waittime = backend_mintime;
1724 3032
3033 /* extra check because io_blocktime is commonly 0 */
1725 if (expect_true (sleeptime > io_blocktime)) 3034 if (expect_false (io_blocktime))
1726 sleeptime = io_blocktime;
1727
1728 if (sleeptime)
1729 { 3035 {
3036 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3037
3038 if (sleeptime > waittime - backend_mintime)
3039 sleeptime = waittime - backend_mintime;
3040
3041 if (expect_true (sleeptime > 0.))
3042 {
1730 ev_sleep (sleeptime); 3043 ev_sleep (sleeptime);
1731 waittime -= sleeptime; 3044 waittime -= sleeptime;
3045 }
1732 } 3046 }
1733 } 3047 }
1734 3048
3049#if EV_FEATURE_API
1735 ++loop_count; 3050 ++loop_count;
3051#endif
3052 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1736 backend_poll (EV_A_ waittime); 3053 backend_poll (EV_A_ waittime);
3054 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3055
3056 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3057
3058 if (pipe_write_skipped)
3059 {
3060 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3061 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3062 }
3063
1737 3064
1738 /* update ev_rt_now, do magic */ 3065 /* update ev_rt_now, do magic */
1739 time_update (EV_A_ waittime + sleeptime); 3066 time_update (EV_A_ waittime + sleeptime);
1740 } 3067 }
1741 3068
… …
1748#if EV_IDLE_ENABLE 3075#if EV_IDLE_ENABLE
1749 /* queue idle watchers unless other events are pending */ 3076 /* queue idle watchers unless other events are pending */
1750 idle_reify (EV_A); 3077 idle_reify (EV_A);
1751#endif 3078#endif
1752 3079
3080#if EV_CHECK_ENABLE
1753 /* queue check watchers, to be executed first */ 3081 /* queue check watchers, to be executed first */
1754 if (expect_false (checkcnt)) 3082 if (expect_false (checkcnt))
1755 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3083 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3084#endif
1756 3085
1757 call_pending (EV_A); 3086 EV_INVOKE_PENDING;
1758 } 3087 }
1759 while (expect_true ( 3088 while (expect_true (
1760 activecnt 3089 activecnt
1761 && !loop_done 3090 && !loop_done
1762 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3091 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1763 )); 3092 ));
1764 3093
1765 if (loop_done == EVUNLOOP_ONE) 3094 if (loop_done == EVBREAK_ONE)
1766 loop_done = EVUNLOOP_CANCEL; 3095 loop_done = EVBREAK_CANCEL;
3096
3097#if EV_FEATURE_API
3098 --loop_depth;
3099#endif
1767} 3100}
1768 3101
1769void 3102void
1770ev_unloop (EV_P_ int how) 3103ev_break (EV_P_ int how)
1771{ 3104{
1772 loop_done = how; 3105 loop_done = how;
1773} 3106}
1774 3107
3108void
3109ev_ref (EV_P)
3110{
3111 ++activecnt;
3112}
3113
3114void
3115ev_unref (EV_P)
3116{
3117 --activecnt;
3118}
3119
3120void
3121ev_now_update (EV_P)
3122{
3123 time_update (EV_A_ 1e100);
3124}
3125
3126void
3127ev_suspend (EV_P)
3128{
3129 ev_now_update (EV_A);
3130}
3131
3132void
3133ev_resume (EV_P)
3134{
3135 ev_tstamp mn_prev = mn_now;
3136
3137 ev_now_update (EV_A);
3138 timers_reschedule (EV_A_ mn_now - mn_prev);
3139#if EV_PERIODIC_ENABLE
3140 /* TODO: really do this? */
3141 periodics_reschedule (EV_A);
3142#endif
3143}
3144
1775/*****************************************************************************/ 3145/*****************************************************************************/
3146/* singly-linked list management, used when the expected list length is short */
1776 3147
1777void inline_size 3148inline_size void
1778wlist_add (WL *head, WL elem) 3149wlist_add (WL *head, WL elem)
1779{ 3150{
1780 elem->next = *head; 3151 elem->next = *head;
1781 *head = elem; 3152 *head = elem;
1782} 3153}
1783 3154
1784void inline_size 3155inline_size void
1785wlist_del (WL *head, WL elem) 3156wlist_del (WL *head, WL elem)
1786{ 3157{
1787 while (*head) 3158 while (*head)
1788 { 3159 {
1789 if (*head == elem) 3160 if (expect_true (*head == elem))
1790 { 3161 {
1791 *head = elem->next; 3162 *head = elem->next;
1792 return; 3163 break;
1793 } 3164 }
1794 3165
1795 head = &(*head)->next; 3166 head = &(*head)->next;
1796 } 3167 }
1797} 3168}
1798 3169
1799void inline_speed 3170/* internal, faster, version of ev_clear_pending */
3171inline_speed void
1800clear_pending (EV_P_ W w) 3172clear_pending (EV_P_ W w)
1801{ 3173{
1802 if (w->pending) 3174 if (w->pending)
1803 { 3175 {
1804 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3176 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1805 w->pending = 0; 3177 w->pending = 0;
1806 } 3178 }
1807} 3179}
1808 3180
1809int 3181int
… …
1813 int pending = w_->pending; 3185 int pending = w_->pending;
1814 3186
1815 if (expect_true (pending)) 3187 if (expect_true (pending))
1816 { 3188 {
1817 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3189 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3190 p->w = (W)&pending_w;
1818 w_->pending = 0; 3191 w_->pending = 0;
1819 p->w = 0;
1820 return p->events; 3192 return p->events;
1821 } 3193 }
1822 else 3194 else
1823 return 0; 3195 return 0;
1824} 3196}
1825 3197
1826void inline_size 3198inline_size void
1827pri_adjust (EV_P_ W w) 3199pri_adjust (EV_P_ W w)
1828{ 3200{
1829 int pri = w->priority; 3201 int pri = ev_priority (w);
1830 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3202 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1831 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3203 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1832 w->priority = pri; 3204 ev_set_priority (w, pri);
1833} 3205}
1834 3206
1835void inline_speed 3207inline_speed void
1836ev_start (EV_P_ W w, int active) 3208ev_start (EV_P_ W w, int active)
1837{ 3209{
1838 pri_adjust (EV_A_ w); 3210 pri_adjust (EV_A_ w);
1839 w->active = active; 3211 w->active = active;
1840 ev_ref (EV_A); 3212 ev_ref (EV_A);
1841} 3213}
1842 3214
1843void inline_size 3215inline_size void
1844ev_stop (EV_P_ W w) 3216ev_stop (EV_P_ W w)
1845{ 3217{
1846 ev_unref (EV_A); 3218 ev_unref (EV_A);
1847 w->active = 0; 3219 w->active = 0;
1848} 3220}
… …
1855 int fd = w->fd; 3227 int fd = w->fd;
1856 3228
1857 if (expect_false (ev_is_active (w))) 3229 if (expect_false (ev_is_active (w)))
1858 return; 3230 return;
1859 3231
1860 assert (("ev_io_start called with negative fd", fd >= 0)); 3232 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3233 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3234
3235 EV_FREQUENT_CHECK;
1861 3236
1862 ev_start (EV_A_ (W)w, 1); 3237 ev_start (EV_A_ (W)w, 1);
1863 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3238 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1864 wlist_add (&anfds[fd].head, (WL)w); 3239 wlist_add (&anfds[fd].head, (WL)w);
1865 3240
1866 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3241 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1867 w->events &= ~EV_IOFDSET; 3242 w->events &= ~EV__IOFDSET;
3243
3244 EV_FREQUENT_CHECK;
1868} 3245}
1869 3246
1870void noinline 3247void noinline
1871ev_io_stop (EV_P_ ev_io *w) 3248ev_io_stop (EV_P_ ev_io *w)
1872{ 3249{
1873 clear_pending (EV_A_ (W)w); 3250 clear_pending (EV_A_ (W)w);
1874 if (expect_false (!ev_is_active (w))) 3251 if (expect_false (!ev_is_active (w)))
1875 return; 3252 return;
1876 3253
1877 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3254 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3255
3256 EV_FREQUENT_CHECK;
1878 3257
1879 wlist_del (&anfds[w->fd].head, (WL)w); 3258 wlist_del (&anfds[w->fd].head, (WL)w);
1880 ev_stop (EV_A_ (W)w); 3259 ev_stop (EV_A_ (W)w);
1881 3260
1882 fd_change (EV_A_ w->fd, 1); 3261 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3262
3263 EV_FREQUENT_CHECK;
1883} 3264}
1884 3265
1885void noinline 3266void noinline
1886ev_timer_start (EV_P_ ev_timer *w) 3267ev_timer_start (EV_P_ ev_timer *w)
1887{ 3268{
1888 if (expect_false (ev_is_active (w))) 3269 if (expect_false (ev_is_active (w)))
1889 return; 3270 return;
1890 3271
1891 ev_at (w) += mn_now; 3272 ev_at (w) += mn_now;
1892 3273
1893 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3274 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1894 3275
3276 EV_FREQUENT_CHECK;
3277
3278 ++timercnt;
1895 ev_start (EV_A_ (W)w, ++timercnt); 3279 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1896 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2); 3280 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1897 timers [timercnt] = (WT)w; 3281 ANHE_w (timers [ev_active (w)]) = (WT)w;
3282 ANHE_at_cache (timers [ev_active (w)]);
1898 upheap (timers, timercnt); 3283 upheap (timers, ev_active (w));
1899 3284
3285 EV_FREQUENT_CHECK;
3286
1900 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/ 3287 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1901} 3288}
1902 3289
1903void noinline 3290void noinline
1904ev_timer_stop (EV_P_ ev_timer *w) 3291ev_timer_stop (EV_P_ ev_timer *w)
1905{ 3292{
1906 clear_pending (EV_A_ (W)w); 3293 clear_pending (EV_A_ (W)w);
1907 if (expect_false (!ev_is_active (w))) 3294 if (expect_false (!ev_is_active (w)))
1908 return; 3295 return;
1909 3296
3297 EV_FREQUENT_CHECK;
3298
1910 { 3299 {
1911 int active = ev_active (w); 3300 int active = ev_active (w);
1912 3301
1913 assert (("internal timer heap corruption", timers [active] == (WT)w)); 3302 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1914 3303
3304 --timercnt;
3305
1915 if (expect_true (active < timercnt)) 3306 if (expect_true (active < timercnt + HEAP0))
1916 { 3307 {
1917 timers [active] = timers [timercnt]; 3308 timers [active] = timers [timercnt + HEAP0];
1918 adjustheap (timers, timercnt, active); 3309 adjustheap (timers, timercnt, active);
1919 } 3310 }
1920
1921 --timercnt;
1922 } 3311 }
1923 3312
1924 ev_at (w) -= mn_now; 3313 ev_at (w) -= mn_now;
1925 3314
1926 ev_stop (EV_A_ (W)w); 3315 ev_stop (EV_A_ (W)w);
3316
3317 EV_FREQUENT_CHECK;
1927} 3318}
1928 3319
1929void noinline 3320void noinline
1930ev_timer_again (EV_P_ ev_timer *w) 3321ev_timer_again (EV_P_ ev_timer *w)
1931{ 3322{
3323 EV_FREQUENT_CHECK;
3324
3325 clear_pending (EV_A_ (W)w);
3326
1932 if (ev_is_active (w)) 3327 if (ev_is_active (w))
1933 { 3328 {
1934 if (w->repeat) 3329 if (w->repeat)
1935 { 3330 {
1936 ev_at (w) = mn_now + w->repeat; 3331 ev_at (w) = mn_now + w->repeat;
3332 ANHE_at_cache (timers [ev_active (w)]);
1937 adjustheap (timers, timercnt, ev_active (w)); 3333 adjustheap (timers, timercnt, ev_active (w));
1938 } 3334 }
1939 else 3335 else
1940 ev_timer_stop (EV_A_ w); 3336 ev_timer_stop (EV_A_ w);
1941 } 3337 }
1942 else if (w->repeat) 3338 else if (w->repeat)
1943 { 3339 {
1944 ev_at (w) = w->repeat; 3340 ev_at (w) = w->repeat;
1945 ev_timer_start (EV_A_ w); 3341 ev_timer_start (EV_A_ w);
1946 } 3342 }
3343
3344 EV_FREQUENT_CHECK;
3345}
3346
3347ev_tstamp
3348ev_timer_remaining (EV_P_ ev_timer *w)
3349{
3350 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1947} 3351}
1948 3352
1949#if EV_PERIODIC_ENABLE 3353#if EV_PERIODIC_ENABLE
1950void noinline 3354void noinline
1951ev_periodic_start (EV_P_ ev_periodic *w) 3355ev_periodic_start (EV_P_ ev_periodic *w)
… …
1955 3359
1956 if (w->reschedule_cb) 3360 if (w->reschedule_cb)
1957 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3361 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1958 else if (w->interval) 3362 else if (w->interval)
1959 { 3363 {
1960 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3364 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1961 /* this formula differs from the one in periodic_reify because we do not always round up */ 3365 periodic_recalc (EV_A_ w);
1962 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1963 } 3366 }
1964 else 3367 else
1965 ev_at (w) = w->offset; 3368 ev_at (w) = w->offset;
1966 3369
3370 EV_FREQUENT_CHECK;
3371
3372 ++periodiccnt;
1967 ev_start (EV_A_ (W)w, ++periodiccnt); 3373 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1968 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2); 3374 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1969 periodics [periodiccnt] = (WT)w; 3375 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1970 upheap (periodics, periodiccnt); 3376 ANHE_at_cache (periodics [ev_active (w)]);
3377 upheap (periodics, ev_active (w));
1971 3378
3379 EV_FREQUENT_CHECK;
3380
1972 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/ 3381 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1973} 3382}
1974 3383
1975void noinline 3384void noinline
1976ev_periodic_stop (EV_P_ ev_periodic *w) 3385ev_periodic_stop (EV_P_ ev_periodic *w)
1977{ 3386{
1978 clear_pending (EV_A_ (W)w); 3387 clear_pending (EV_A_ (W)w);
1979 if (expect_false (!ev_is_active (w))) 3388 if (expect_false (!ev_is_active (w)))
1980 return; 3389 return;
1981 3390
3391 EV_FREQUENT_CHECK;
3392
1982 { 3393 {
1983 int active = ev_active (w); 3394 int active = ev_active (w);
1984 3395
1985 assert (("internal periodic heap corruption", periodics [active] == (WT)w)); 3396 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1986 3397
3398 --periodiccnt;
3399
1987 if (expect_true (active < periodiccnt)) 3400 if (expect_true (active < periodiccnt + HEAP0))
1988 { 3401 {
1989 periodics [active] = periodics [periodiccnt]; 3402 periodics [active] = periodics [periodiccnt + HEAP0];
1990 adjustheap (periodics, periodiccnt, active); 3403 adjustheap (periodics, periodiccnt, active);
1991 } 3404 }
1992
1993 --periodiccnt;
1994 } 3405 }
1995 3406
1996 ev_stop (EV_A_ (W)w); 3407 ev_stop (EV_A_ (W)w);
3408
3409 EV_FREQUENT_CHECK;
1997} 3410}
1998 3411
1999void noinline 3412void noinline
2000ev_periodic_again (EV_P_ ev_periodic *w) 3413ev_periodic_again (EV_P_ ev_periodic *w)
2001{ 3414{
… …
2007 3420
2008#ifndef SA_RESTART 3421#ifndef SA_RESTART
2009# define SA_RESTART 0 3422# define SA_RESTART 0
2010#endif 3423#endif
2011 3424
3425#if EV_SIGNAL_ENABLE
3426
2012void noinline 3427void noinline
2013ev_signal_start (EV_P_ ev_signal *w) 3428ev_signal_start (EV_P_ ev_signal *w)
2014{ 3429{
2015#if EV_MULTIPLICITY
2016 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2017#endif
2018 if (expect_false (ev_is_active (w))) 3430 if (expect_false (ev_is_active (w)))
2019 return; 3431 return;
2020 3432
2021 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3433 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2022 3434
2023 evpipe_init (EV_A); 3435#if EV_MULTIPLICITY
3436 assert (("libev: a signal must not be attached to two different loops",
3437 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2024 3438
3439 signals [w->signum - 1].loop = EV_A;
3440#endif
3441
3442 EV_FREQUENT_CHECK;
3443
3444#if EV_USE_SIGNALFD
3445 if (sigfd == -2)
2025 { 3446 {
2026#ifndef _WIN32 3447 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2027 sigset_t full, prev; 3448 if (sigfd < 0 && errno == EINVAL)
2028 sigfillset (&full); 3449 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2029 sigprocmask (SIG_SETMASK, &full, &prev);
2030#endif
2031 3450
2032 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3451 if (sigfd >= 0)
3452 {
3453 fd_intern (sigfd); /* doing it twice will not hurt */
2033 3454
2034#ifndef _WIN32 3455 sigemptyset (&sigfd_set);
2035 sigprocmask (SIG_SETMASK, &prev, 0); 3456
2036#endif 3457 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3458 ev_set_priority (&sigfd_w, EV_MAXPRI);
3459 ev_io_start (EV_A_ &sigfd_w);
3460 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3461 }
2037 } 3462 }
3463
3464 if (sigfd >= 0)
3465 {
3466 /* TODO: check .head */
3467 sigaddset (&sigfd_set, w->signum);
3468 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3469
3470 signalfd (sigfd, &sigfd_set, 0);
3471 }
3472#endif
2038 3473
2039 ev_start (EV_A_ (W)w, 1); 3474 ev_start (EV_A_ (W)w, 1);
2040 wlist_add (&signals [w->signum - 1].head, (WL)w); 3475 wlist_add (&signals [w->signum - 1].head, (WL)w);
2041 3476
2042 if (!((WL)w)->next) 3477 if (!((WL)w)->next)
3478# if EV_USE_SIGNALFD
3479 if (sigfd < 0) /*TODO*/
3480# endif
2043 { 3481 {
2044#if _WIN32 3482# ifdef _WIN32
3483 evpipe_init (EV_A);
3484
2045 signal (w->signum, ev_sighandler); 3485 signal (w->signum, ev_sighandler);
2046#else 3486# else
2047 struct sigaction sa; 3487 struct sigaction sa;
3488
3489 evpipe_init (EV_A);
3490
2048 sa.sa_handler = ev_sighandler; 3491 sa.sa_handler = ev_sighandler;
2049 sigfillset (&sa.sa_mask); 3492 sigfillset (&sa.sa_mask);
2050 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3493 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2051 sigaction (w->signum, &sa, 0); 3494 sigaction (w->signum, &sa, 0);
3495
3496 if (origflags & EVFLAG_NOSIGMASK)
3497 {
3498 sigemptyset (&sa.sa_mask);
3499 sigaddset (&sa.sa_mask, w->signum);
3500 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3501 }
2052#endif 3502#endif
2053 } 3503 }
3504
3505 EV_FREQUENT_CHECK;
2054} 3506}
2055 3507
2056void noinline 3508void noinline
2057ev_signal_stop (EV_P_ ev_signal *w) 3509ev_signal_stop (EV_P_ ev_signal *w)
2058{ 3510{
2059 clear_pending (EV_A_ (W)w); 3511 clear_pending (EV_A_ (W)w);
2060 if (expect_false (!ev_is_active (w))) 3512 if (expect_false (!ev_is_active (w)))
2061 return; 3513 return;
2062 3514
3515 EV_FREQUENT_CHECK;
3516
2063 wlist_del (&signals [w->signum - 1].head, (WL)w); 3517 wlist_del (&signals [w->signum - 1].head, (WL)w);
2064 ev_stop (EV_A_ (W)w); 3518 ev_stop (EV_A_ (W)w);
2065 3519
2066 if (!signals [w->signum - 1].head) 3520 if (!signals [w->signum - 1].head)
3521 {
3522#if EV_MULTIPLICITY
3523 signals [w->signum - 1].loop = 0; /* unattach from signal */
3524#endif
3525#if EV_USE_SIGNALFD
3526 if (sigfd >= 0)
3527 {
3528 sigset_t ss;
3529
3530 sigemptyset (&ss);
3531 sigaddset (&ss, w->signum);
3532 sigdelset (&sigfd_set, w->signum);
3533
3534 signalfd (sigfd, &sigfd_set, 0);
3535 sigprocmask (SIG_UNBLOCK, &ss, 0);
3536 }
3537 else
3538#endif
2067 signal (w->signum, SIG_DFL); 3539 signal (w->signum, SIG_DFL);
3540 }
3541
3542 EV_FREQUENT_CHECK;
2068} 3543}
3544
3545#endif
3546
3547#if EV_CHILD_ENABLE
2069 3548
2070void 3549void
2071ev_child_start (EV_P_ ev_child *w) 3550ev_child_start (EV_P_ ev_child *w)
2072{ 3551{
2073#if EV_MULTIPLICITY 3552#if EV_MULTIPLICITY
2074 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3553 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2075#endif 3554#endif
2076 if (expect_false (ev_is_active (w))) 3555 if (expect_false (ev_is_active (w)))
2077 return; 3556 return;
2078 3557
3558 EV_FREQUENT_CHECK;
3559
2079 ev_start (EV_A_ (W)w, 1); 3560 ev_start (EV_A_ (W)w, 1);
2080 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3561 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3562
3563 EV_FREQUENT_CHECK;
2081} 3564}
2082 3565
2083void 3566void
2084ev_child_stop (EV_P_ ev_child *w) 3567ev_child_stop (EV_P_ ev_child *w)
2085{ 3568{
2086 clear_pending (EV_A_ (W)w); 3569 clear_pending (EV_A_ (W)w);
2087 if (expect_false (!ev_is_active (w))) 3570 if (expect_false (!ev_is_active (w)))
2088 return; 3571 return;
2089 3572
3573 EV_FREQUENT_CHECK;
3574
2090 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3575 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2091 ev_stop (EV_A_ (W)w); 3576 ev_stop (EV_A_ (W)w);
3577
3578 EV_FREQUENT_CHECK;
2092} 3579}
3580
3581#endif
2093 3582
2094#if EV_STAT_ENABLE 3583#if EV_STAT_ENABLE
2095 3584
2096# ifdef _WIN32 3585# ifdef _WIN32
2097# undef lstat 3586# undef lstat
2098# define lstat(a,b) _stati64 (a,b) 3587# define lstat(a,b) _stati64 (a,b)
2099# endif 3588# endif
2100 3589
2101#define DEF_STAT_INTERVAL 5.0074891 3590#define DEF_STAT_INTERVAL 5.0074891
3591#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2102#define MIN_STAT_INTERVAL 0.1074891 3592#define MIN_STAT_INTERVAL 0.1074891
2103 3593
2104static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3594static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2105 3595
2106#if EV_USE_INOTIFY 3596#if EV_USE_INOTIFY
2107# define EV_INOTIFY_BUFSIZE 8192 3597
3598/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3599# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2108 3600
2109static void noinline 3601static void noinline
2110infy_add (EV_P_ ev_stat *w) 3602infy_add (EV_P_ ev_stat *w)
2111{ 3603{
2112 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); 3604 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);
2113 3605
2114 if (w->wd < 0) 3606 if (w->wd >= 0)
3607 {
3608 struct statfs sfs;
3609
3610 /* now local changes will be tracked by inotify, but remote changes won't */
3611 /* unless the filesystem is known to be local, we therefore still poll */
3612 /* also do poll on <2.6.25, but with normal frequency */
3613
3614 if (!fs_2625)
3615 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3616 else if (!statfs (w->path, &sfs)
3617 && (sfs.f_type == 0x1373 /* devfs */
3618 || sfs.f_type == 0xEF53 /* ext2/3 */
3619 || sfs.f_type == 0x3153464a /* jfs */
3620 || sfs.f_type == 0x52654973 /* reiser3 */
3621 || sfs.f_type == 0x01021994 /* tempfs */
3622 || sfs.f_type == 0x58465342 /* xfs */))
3623 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3624 else
3625 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2115 { 3626 }
2116 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3627 else
3628 {
3629 /* can't use inotify, continue to stat */
3630 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2117 3631
2118 /* monitor some parent directory for speedup hints */ 3632 /* if path is not there, monitor some parent directory for speedup hints */
3633 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3634 /* but an efficiency issue only */
2119 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3635 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2120 { 3636 {
2121 char path [4096]; 3637 char path [4096];
2122 strcpy (path, w->path); 3638 strcpy (path, w->path);
2123 3639
… …
2126 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3642 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2127 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3643 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2128 3644
2129 char *pend = strrchr (path, '/'); 3645 char *pend = strrchr (path, '/');
2130 3646
2131 if (!pend) 3647 if (!pend || pend == path)
2132 break; /* whoops, no '/', complain to your admin */ 3648 break;
2133 3649
2134 *pend = 0; 3650 *pend = 0;
2135 w->wd = inotify_add_watch (fs_fd, path, mask); 3651 w->wd = inotify_add_watch (fs_fd, path, mask);
2136 } 3652 }
2137 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3653 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2138 } 3654 }
2139 } 3655 }
2140 else
2141 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2142 3656
2143 if (w->wd >= 0) 3657 if (w->wd >= 0)
2144 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3658 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3659
3660 /* now re-arm timer, if required */
3661 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3662 ev_timer_again (EV_A_ &w->timer);
3663 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2145} 3664}
2146 3665
2147static void noinline 3666static void noinline
2148infy_del (EV_P_ ev_stat *w) 3667infy_del (EV_P_ ev_stat *w)
2149{ 3668{
… …
2152 3671
2153 if (wd < 0) 3672 if (wd < 0)
2154 return; 3673 return;
2155 3674
2156 w->wd = -2; 3675 w->wd = -2;
2157 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3676 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2158 wlist_del (&fs_hash [slot].head, (WL)w); 3677 wlist_del (&fs_hash [slot].head, (WL)w);
2159 3678
2160 /* remove this watcher, if others are watching it, they will rearm */ 3679 /* remove this watcher, if others are watching it, they will rearm */
2161 inotify_rm_watch (fs_fd, wd); 3680 inotify_rm_watch (fs_fd, wd);
2162} 3681}
2163 3682
2164static void noinline 3683static void noinline
2165infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3684infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2166{ 3685{
2167 if (slot < 0) 3686 if (slot < 0)
2168 /* overflow, need to check for all hahs slots */ 3687 /* overflow, need to check for all hash slots */
2169 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3688 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2170 infy_wd (EV_A_ slot, wd, ev); 3689 infy_wd (EV_A_ slot, wd, ev);
2171 else 3690 else
2172 { 3691 {
2173 WL w_; 3692 WL w_;
2174 3693
2175 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3694 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2176 { 3695 {
2177 ev_stat *w = (ev_stat *)w_; 3696 ev_stat *w = (ev_stat *)w_;
2178 w_ = w_->next; /* lets us remove this watcher and all before it */ 3697 w_ = w_->next; /* lets us remove this watcher and all before it */
2179 3698
2180 if (w->wd == wd || wd == -1) 3699 if (w->wd == wd || wd == -1)
2181 { 3700 {
2182 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3701 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2183 { 3702 {
3703 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2184 w->wd = -1; 3704 w->wd = -1;
2185 infy_add (EV_A_ w); /* re-add, no matter what */ 3705 infy_add (EV_A_ w); /* re-add, no matter what */
2186 } 3706 }
2187 3707
2188 stat_timer_cb (EV_A_ &w->timer, 0); 3708 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2193 3713
2194static void 3714static void
2195infy_cb (EV_P_ ev_io *w, int revents) 3715infy_cb (EV_P_ ev_io *w, int revents)
2196{ 3716{
2197 char buf [EV_INOTIFY_BUFSIZE]; 3717 char buf [EV_INOTIFY_BUFSIZE];
2198 struct inotify_event *ev = (struct inotify_event *)buf;
2199 int ofs; 3718 int ofs;
2200 int len = read (fs_fd, buf, sizeof (buf)); 3719 int len = read (fs_fd, buf, sizeof (buf));
2201 3720
2202 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3721 for (ofs = 0; ofs < len; )
3722 {
3723 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2203 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3724 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3725 ofs += sizeof (struct inotify_event) + ev->len;
3726 }
2204} 3727}
2205 3728
2206void inline_size 3729inline_size void ecb_cold
3730ev_check_2625 (EV_P)
3731{
3732 /* kernels < 2.6.25 are borked
3733 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3734 */
3735 if (ev_linux_version () < 0x020619)
3736 return;
3737
3738 fs_2625 = 1;
3739}
3740
3741inline_size int
3742infy_newfd (void)
3743{
3744#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3745 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3746 if (fd >= 0)
3747 return fd;
3748#endif
3749 return inotify_init ();
3750}
3751
3752inline_size void
2207infy_init (EV_P) 3753infy_init (EV_P)
2208{ 3754{
2209 if (fs_fd != -2) 3755 if (fs_fd != -2)
2210 return; 3756 return;
2211 3757
3758 fs_fd = -1;
3759
3760 ev_check_2625 (EV_A);
3761
2212 fs_fd = inotify_init (); 3762 fs_fd = infy_newfd ();
2213 3763
2214 if (fs_fd >= 0) 3764 if (fs_fd >= 0)
2215 { 3765 {
3766 fd_intern (fs_fd);
2216 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3767 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2217 ev_set_priority (&fs_w, EV_MAXPRI); 3768 ev_set_priority (&fs_w, EV_MAXPRI);
2218 ev_io_start (EV_A_ &fs_w); 3769 ev_io_start (EV_A_ &fs_w);
3770 ev_unref (EV_A);
2219 } 3771 }
2220} 3772}
2221 3773
2222void inline_size 3774inline_size void
2223infy_fork (EV_P) 3775infy_fork (EV_P)
2224{ 3776{
2225 int slot; 3777 int slot;
2226 3778
2227 if (fs_fd < 0) 3779 if (fs_fd < 0)
2228 return; 3780 return;
2229 3781
3782 ev_ref (EV_A);
3783 ev_io_stop (EV_A_ &fs_w);
2230 close (fs_fd); 3784 close (fs_fd);
2231 fs_fd = inotify_init (); 3785 fs_fd = infy_newfd ();
2232 3786
3787 if (fs_fd >= 0)
3788 {
3789 fd_intern (fs_fd);
3790 ev_io_set (&fs_w, fs_fd, EV_READ);
3791 ev_io_start (EV_A_ &fs_w);
3792 ev_unref (EV_A);
3793 }
3794
2233 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3795 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2234 { 3796 {
2235 WL w_ = fs_hash [slot].head; 3797 WL w_ = fs_hash [slot].head;
2236 fs_hash [slot].head = 0; 3798 fs_hash [slot].head = 0;
2237 3799
2238 while (w_) 3800 while (w_)
… …
2243 w->wd = -1; 3805 w->wd = -1;
2244 3806
2245 if (fs_fd >= 0) 3807 if (fs_fd >= 0)
2246 infy_add (EV_A_ w); /* re-add, no matter what */ 3808 infy_add (EV_A_ w); /* re-add, no matter what */
2247 else 3809 else
3810 {
3811 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3812 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2248 ev_timer_start (EV_A_ &w->timer); 3813 ev_timer_again (EV_A_ &w->timer);
3814 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3815 }
2249 } 3816 }
2250
2251 } 3817 }
2252} 3818}
2253 3819
3820#endif
3821
3822#ifdef _WIN32
3823# define EV_LSTAT(p,b) _stati64 (p, b)
3824#else
3825# define EV_LSTAT(p,b) lstat (p, b)
2254#endif 3826#endif
2255 3827
2256void 3828void
2257ev_stat_stat (EV_P_ ev_stat *w) 3829ev_stat_stat (EV_P_ ev_stat *w)
2258{ 3830{
… …
2265static void noinline 3837static void noinline
2266stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3838stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2267{ 3839{
2268 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3840 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2269 3841
2270 /* we copy this here each the time so that */ 3842 ev_statdata prev = w->attr;
2271 /* prev has the old value when the callback gets invoked */
2272 w->prev = w->attr;
2273 ev_stat_stat (EV_A_ w); 3843 ev_stat_stat (EV_A_ w);
2274 3844
2275 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3845 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2276 if ( 3846 if (
2277 w->prev.st_dev != w->attr.st_dev 3847 prev.st_dev != w->attr.st_dev
2278 || w->prev.st_ino != w->attr.st_ino 3848 || prev.st_ino != w->attr.st_ino
2279 || w->prev.st_mode != w->attr.st_mode 3849 || prev.st_mode != w->attr.st_mode
2280 || w->prev.st_nlink != w->attr.st_nlink 3850 || prev.st_nlink != w->attr.st_nlink
2281 || w->prev.st_uid != w->attr.st_uid 3851 || prev.st_uid != w->attr.st_uid
2282 || w->prev.st_gid != w->attr.st_gid 3852 || prev.st_gid != w->attr.st_gid
2283 || w->prev.st_rdev != w->attr.st_rdev 3853 || prev.st_rdev != w->attr.st_rdev
2284 || w->prev.st_size != w->attr.st_size 3854 || prev.st_size != w->attr.st_size
2285 || w->prev.st_atime != w->attr.st_atime 3855 || prev.st_atime != w->attr.st_atime
2286 || w->prev.st_mtime != w->attr.st_mtime 3856 || prev.st_mtime != w->attr.st_mtime
2287 || w->prev.st_ctime != w->attr.st_ctime 3857 || prev.st_ctime != w->attr.st_ctime
2288 ) { 3858 ) {
3859 /* we only update w->prev on actual differences */
3860 /* in case we test more often than invoke the callback, */
3861 /* to ensure that prev is always different to attr */
3862 w->prev = prev;
3863
2289 #if EV_USE_INOTIFY 3864 #if EV_USE_INOTIFY
3865 if (fs_fd >= 0)
3866 {
2290 infy_del (EV_A_ w); 3867 infy_del (EV_A_ w);
2291 infy_add (EV_A_ w); 3868 infy_add (EV_A_ w);
2292 ev_stat_stat (EV_A_ w); /* avoid race... */ 3869 ev_stat_stat (EV_A_ w); /* avoid race... */
3870 }
2293 #endif 3871 #endif
2294 3872
2295 ev_feed_event (EV_A_ w, EV_STAT); 3873 ev_feed_event (EV_A_ w, EV_STAT);
2296 } 3874 }
2297} 3875}
… …
2300ev_stat_start (EV_P_ ev_stat *w) 3878ev_stat_start (EV_P_ ev_stat *w)
2301{ 3879{
2302 if (expect_false (ev_is_active (w))) 3880 if (expect_false (ev_is_active (w)))
2303 return; 3881 return;
2304 3882
2305 /* since we use memcmp, we need to clear any padding data etc. */
2306 memset (&w->prev, 0, sizeof (ev_statdata));
2307 memset (&w->attr, 0, sizeof (ev_statdata));
2308
2309 ev_stat_stat (EV_A_ w); 3883 ev_stat_stat (EV_A_ w);
2310 3884
3885 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2311 if (w->interval < MIN_STAT_INTERVAL) 3886 w->interval = MIN_STAT_INTERVAL;
2312 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2313 3887
2314 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3888 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2315 ev_set_priority (&w->timer, ev_priority (w)); 3889 ev_set_priority (&w->timer, ev_priority (w));
2316 3890
2317#if EV_USE_INOTIFY 3891#if EV_USE_INOTIFY
2318 infy_init (EV_A); 3892 infy_init (EV_A);
2319 3893
2320 if (fs_fd >= 0) 3894 if (fs_fd >= 0)
2321 infy_add (EV_A_ w); 3895 infy_add (EV_A_ w);
2322 else 3896 else
2323#endif 3897#endif
3898 {
2324 ev_timer_start (EV_A_ &w->timer); 3899 ev_timer_again (EV_A_ &w->timer);
3900 ev_unref (EV_A);
3901 }
2325 3902
2326 ev_start (EV_A_ (W)w, 1); 3903 ev_start (EV_A_ (W)w, 1);
3904
3905 EV_FREQUENT_CHECK;
2327} 3906}
2328 3907
2329void 3908void
2330ev_stat_stop (EV_P_ ev_stat *w) 3909ev_stat_stop (EV_P_ ev_stat *w)
2331{ 3910{
2332 clear_pending (EV_A_ (W)w); 3911 clear_pending (EV_A_ (W)w);
2333 if (expect_false (!ev_is_active (w))) 3912 if (expect_false (!ev_is_active (w)))
2334 return; 3913 return;
2335 3914
3915 EV_FREQUENT_CHECK;
3916
2336#if EV_USE_INOTIFY 3917#if EV_USE_INOTIFY
2337 infy_del (EV_A_ w); 3918 infy_del (EV_A_ w);
2338#endif 3919#endif
3920
3921 if (ev_is_active (&w->timer))
3922 {
3923 ev_ref (EV_A);
2339 ev_timer_stop (EV_A_ &w->timer); 3924 ev_timer_stop (EV_A_ &w->timer);
3925 }
2340 3926
2341 ev_stop (EV_A_ (W)w); 3927 ev_stop (EV_A_ (W)w);
3928
3929 EV_FREQUENT_CHECK;
2342} 3930}
2343#endif 3931#endif
2344 3932
2345#if EV_IDLE_ENABLE 3933#if EV_IDLE_ENABLE
2346void 3934void
… …
2349 if (expect_false (ev_is_active (w))) 3937 if (expect_false (ev_is_active (w)))
2350 return; 3938 return;
2351 3939
2352 pri_adjust (EV_A_ (W)w); 3940 pri_adjust (EV_A_ (W)w);
2353 3941
3942 EV_FREQUENT_CHECK;
3943
2354 { 3944 {
2355 int active = ++idlecnt [ABSPRI (w)]; 3945 int active = ++idlecnt [ABSPRI (w)];
2356 3946
2357 ++idleall; 3947 ++idleall;
2358 ev_start (EV_A_ (W)w, active); 3948 ev_start (EV_A_ (W)w, active);
2359 3949
2360 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3950 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2361 idles [ABSPRI (w)][active - 1] = w; 3951 idles [ABSPRI (w)][active - 1] = w;
2362 } 3952 }
3953
3954 EV_FREQUENT_CHECK;
2363} 3955}
2364 3956
2365void 3957void
2366ev_idle_stop (EV_P_ ev_idle *w) 3958ev_idle_stop (EV_P_ ev_idle *w)
2367{ 3959{
2368 clear_pending (EV_A_ (W)w); 3960 clear_pending (EV_A_ (W)w);
2369 if (expect_false (!ev_is_active (w))) 3961 if (expect_false (!ev_is_active (w)))
2370 return; 3962 return;
2371 3963
3964 EV_FREQUENT_CHECK;
3965
2372 { 3966 {
2373 int active = ev_active (w); 3967 int active = ev_active (w);
2374 3968
2375 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3969 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2376 ev_active (idles [ABSPRI (w)][active - 1]) = active; 3970 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2377 3971
2378 ev_stop (EV_A_ (W)w); 3972 ev_stop (EV_A_ (W)w);
2379 --idleall; 3973 --idleall;
2380 } 3974 }
2381}
2382#endif
2383 3975
3976 EV_FREQUENT_CHECK;
3977}
3978#endif
3979
3980#if EV_PREPARE_ENABLE
2384void 3981void
2385ev_prepare_start (EV_P_ ev_prepare *w) 3982ev_prepare_start (EV_P_ ev_prepare *w)
2386{ 3983{
2387 if (expect_false (ev_is_active (w))) 3984 if (expect_false (ev_is_active (w)))
2388 return; 3985 return;
3986
3987 EV_FREQUENT_CHECK;
2389 3988
2390 ev_start (EV_A_ (W)w, ++preparecnt); 3989 ev_start (EV_A_ (W)w, ++preparecnt);
2391 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3990 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2392 prepares [preparecnt - 1] = w; 3991 prepares [preparecnt - 1] = w;
3992
3993 EV_FREQUENT_CHECK;
2393} 3994}
2394 3995
2395void 3996void
2396ev_prepare_stop (EV_P_ ev_prepare *w) 3997ev_prepare_stop (EV_P_ ev_prepare *w)
2397{ 3998{
2398 clear_pending (EV_A_ (W)w); 3999 clear_pending (EV_A_ (W)w);
2399 if (expect_false (!ev_is_active (w))) 4000 if (expect_false (!ev_is_active (w)))
2400 return; 4001 return;
2401 4002
4003 EV_FREQUENT_CHECK;
4004
2402 { 4005 {
2403 int active = ev_active (w); 4006 int active = ev_active (w);
2404 4007
2405 prepares [active - 1] = prepares [--preparecnt]; 4008 prepares [active - 1] = prepares [--preparecnt];
2406 ev_active (prepares [active - 1]) = active; 4009 ev_active (prepares [active - 1]) = active;
2407 } 4010 }
2408 4011
2409 ev_stop (EV_A_ (W)w); 4012 ev_stop (EV_A_ (W)w);
2410}
2411 4013
4014 EV_FREQUENT_CHECK;
4015}
4016#endif
4017
4018#if EV_CHECK_ENABLE
2412void 4019void
2413ev_check_start (EV_P_ ev_check *w) 4020ev_check_start (EV_P_ ev_check *w)
2414{ 4021{
2415 if (expect_false (ev_is_active (w))) 4022 if (expect_false (ev_is_active (w)))
2416 return; 4023 return;
4024
4025 EV_FREQUENT_CHECK;
2417 4026
2418 ev_start (EV_A_ (W)w, ++checkcnt); 4027 ev_start (EV_A_ (W)w, ++checkcnt);
2419 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4028 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2420 checks [checkcnt - 1] = w; 4029 checks [checkcnt - 1] = w;
4030
4031 EV_FREQUENT_CHECK;
2421} 4032}
2422 4033
2423void 4034void
2424ev_check_stop (EV_P_ ev_check *w) 4035ev_check_stop (EV_P_ ev_check *w)
2425{ 4036{
2426 clear_pending (EV_A_ (W)w); 4037 clear_pending (EV_A_ (W)w);
2427 if (expect_false (!ev_is_active (w))) 4038 if (expect_false (!ev_is_active (w)))
2428 return; 4039 return;
2429 4040
4041 EV_FREQUENT_CHECK;
4042
2430 { 4043 {
2431 int active = ev_active (w); 4044 int active = ev_active (w);
2432 4045
2433 checks [active - 1] = checks [--checkcnt]; 4046 checks [active - 1] = checks [--checkcnt];
2434 ev_active (checks [active - 1]) = active; 4047 ev_active (checks [active - 1]) = active;
2435 } 4048 }
2436 4049
2437 ev_stop (EV_A_ (W)w); 4050 ev_stop (EV_A_ (W)w);
4051
4052 EV_FREQUENT_CHECK;
2438} 4053}
4054#endif
2439 4055
2440#if EV_EMBED_ENABLE 4056#if EV_EMBED_ENABLE
2441void noinline 4057void noinline
2442ev_embed_sweep (EV_P_ ev_embed *w) 4058ev_embed_sweep (EV_P_ ev_embed *w)
2443{ 4059{
2444 ev_loop (w->other, EVLOOP_NONBLOCK); 4060 ev_run (w->other, EVRUN_NOWAIT);
2445} 4061}
2446 4062
2447static void 4063static void
2448embed_io_cb (EV_P_ ev_io *io, int revents) 4064embed_io_cb (EV_P_ ev_io *io, int revents)
2449{ 4065{
2450 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4066 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2451 4067
2452 if (ev_cb (w)) 4068 if (ev_cb (w))
2453 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4069 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2454 else 4070 else
2455 ev_loop (w->other, EVLOOP_NONBLOCK); 4071 ev_run (w->other, EVRUN_NOWAIT);
2456} 4072}
2457 4073
2458static void 4074static void
2459embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4075embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2460{ 4076{
2461 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4077 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2462 4078
2463 { 4079 {
2464 struct ev_loop *loop = w->other; 4080 EV_P = w->other;
2465 4081
2466 while (fdchangecnt) 4082 while (fdchangecnt)
2467 { 4083 {
2468 fd_reify (EV_A); 4084 fd_reify (EV_A);
2469 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4085 ev_run (EV_A_ EVRUN_NOWAIT);
2470 } 4086 }
2471 } 4087 }
4088}
4089
4090static void
4091embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4092{
4093 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4094
4095 ev_embed_stop (EV_A_ w);
4096
4097 {
4098 EV_P = w->other;
4099
4100 ev_loop_fork (EV_A);
4101 ev_run (EV_A_ EVRUN_NOWAIT);
4102 }
4103
4104 ev_embed_start (EV_A_ w);
2472} 4105}
2473 4106
2474#if 0 4107#if 0
2475static void 4108static void
2476embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4109embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2484{ 4117{
2485 if (expect_false (ev_is_active (w))) 4118 if (expect_false (ev_is_active (w)))
2486 return; 4119 return;
2487 4120
2488 { 4121 {
2489 struct ev_loop *loop = w->other; 4122 EV_P = w->other;
2490 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4123 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2491 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4124 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2492 } 4125 }
4126
4127 EV_FREQUENT_CHECK;
2493 4128
2494 ev_set_priority (&w->io, ev_priority (w)); 4129 ev_set_priority (&w->io, ev_priority (w));
2495 ev_io_start (EV_A_ &w->io); 4130 ev_io_start (EV_A_ &w->io);
2496 4131
2497 ev_prepare_init (&w->prepare, embed_prepare_cb); 4132 ev_prepare_init (&w->prepare, embed_prepare_cb);
2498 ev_set_priority (&w->prepare, EV_MINPRI); 4133 ev_set_priority (&w->prepare, EV_MINPRI);
2499 ev_prepare_start (EV_A_ &w->prepare); 4134 ev_prepare_start (EV_A_ &w->prepare);
2500 4135
4136 ev_fork_init (&w->fork, embed_fork_cb);
4137 ev_fork_start (EV_A_ &w->fork);
4138
2501 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4139 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2502 4140
2503 ev_start (EV_A_ (W)w, 1); 4141 ev_start (EV_A_ (W)w, 1);
4142
4143 EV_FREQUENT_CHECK;
2504} 4144}
2505 4145
2506void 4146void
2507ev_embed_stop (EV_P_ ev_embed *w) 4147ev_embed_stop (EV_P_ ev_embed *w)
2508{ 4148{
2509 clear_pending (EV_A_ (W)w); 4149 clear_pending (EV_A_ (W)w);
2510 if (expect_false (!ev_is_active (w))) 4150 if (expect_false (!ev_is_active (w)))
2511 return; 4151 return;
2512 4152
4153 EV_FREQUENT_CHECK;
4154
2513 ev_io_stop (EV_A_ &w->io); 4155 ev_io_stop (EV_A_ &w->io);
2514 ev_prepare_stop (EV_A_ &w->prepare); 4156 ev_prepare_stop (EV_A_ &w->prepare);
4157 ev_fork_stop (EV_A_ &w->fork);
2515 4158
2516 ev_stop (EV_A_ (W)w); 4159 ev_stop (EV_A_ (W)w);
4160
4161 EV_FREQUENT_CHECK;
2517} 4162}
2518#endif 4163#endif
2519 4164
2520#if EV_FORK_ENABLE 4165#if EV_FORK_ENABLE
2521void 4166void
2522ev_fork_start (EV_P_ ev_fork *w) 4167ev_fork_start (EV_P_ ev_fork *w)
2523{ 4168{
2524 if (expect_false (ev_is_active (w))) 4169 if (expect_false (ev_is_active (w)))
2525 return; 4170 return;
2526 4171
4172 EV_FREQUENT_CHECK;
4173
2527 ev_start (EV_A_ (W)w, ++forkcnt); 4174 ev_start (EV_A_ (W)w, ++forkcnt);
2528 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4175 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2529 forks [forkcnt - 1] = w; 4176 forks [forkcnt - 1] = w;
4177
4178 EV_FREQUENT_CHECK;
2530} 4179}
2531 4180
2532void 4181void
2533ev_fork_stop (EV_P_ ev_fork *w) 4182ev_fork_stop (EV_P_ ev_fork *w)
2534{ 4183{
2535 clear_pending (EV_A_ (W)w); 4184 clear_pending (EV_A_ (W)w);
2536 if (expect_false (!ev_is_active (w))) 4185 if (expect_false (!ev_is_active (w)))
2537 return; 4186 return;
2538 4187
4188 EV_FREQUENT_CHECK;
4189
2539 { 4190 {
2540 int active = ev_active (w); 4191 int active = ev_active (w);
2541 4192
2542 forks [active - 1] = forks [--forkcnt]; 4193 forks [active - 1] = forks [--forkcnt];
2543 ev_active (forks [active - 1]) = active; 4194 ev_active (forks [active - 1]) = active;
2544 } 4195 }
2545 4196
2546 ev_stop (EV_A_ (W)w); 4197 ev_stop (EV_A_ (W)w);
4198
4199 EV_FREQUENT_CHECK;
4200}
4201#endif
4202
4203#if EV_CLEANUP_ENABLE
4204void
4205ev_cleanup_start (EV_P_ ev_cleanup *w)
4206{
4207 if (expect_false (ev_is_active (w)))
4208 return;
4209
4210 EV_FREQUENT_CHECK;
4211
4212 ev_start (EV_A_ (W)w, ++cleanupcnt);
4213 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4214 cleanups [cleanupcnt - 1] = w;
4215
4216 /* cleanup watchers should never keep a refcount on the loop */
4217 ev_unref (EV_A);
4218 EV_FREQUENT_CHECK;
4219}
4220
4221void
4222ev_cleanup_stop (EV_P_ ev_cleanup *w)
4223{
4224 clear_pending (EV_A_ (W)w);
4225 if (expect_false (!ev_is_active (w)))
4226 return;
4227
4228 EV_FREQUENT_CHECK;
4229 ev_ref (EV_A);
4230
4231 {
4232 int active = ev_active (w);
4233
4234 cleanups [active - 1] = cleanups [--cleanupcnt];
4235 ev_active (cleanups [active - 1]) = active;
4236 }
4237
4238 ev_stop (EV_A_ (W)w);
4239
4240 EV_FREQUENT_CHECK;
2547} 4241}
2548#endif 4242#endif
2549 4243
2550#if EV_ASYNC_ENABLE 4244#if EV_ASYNC_ENABLE
2551void 4245void
2552ev_async_start (EV_P_ ev_async *w) 4246ev_async_start (EV_P_ ev_async *w)
2553{ 4247{
2554 if (expect_false (ev_is_active (w))) 4248 if (expect_false (ev_is_active (w)))
2555 return; 4249 return;
2556 4250
4251 w->sent = 0;
4252
2557 evpipe_init (EV_A); 4253 evpipe_init (EV_A);
4254
4255 EV_FREQUENT_CHECK;
2558 4256
2559 ev_start (EV_A_ (W)w, ++asynccnt); 4257 ev_start (EV_A_ (W)w, ++asynccnt);
2560 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4258 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2561 asyncs [asynccnt - 1] = w; 4259 asyncs [asynccnt - 1] = w;
4260
4261 EV_FREQUENT_CHECK;
2562} 4262}
2563 4263
2564void 4264void
2565ev_async_stop (EV_P_ ev_async *w) 4265ev_async_stop (EV_P_ ev_async *w)
2566{ 4266{
2567 clear_pending (EV_A_ (W)w); 4267 clear_pending (EV_A_ (W)w);
2568 if (expect_false (!ev_is_active (w))) 4268 if (expect_false (!ev_is_active (w)))
2569 return; 4269 return;
2570 4270
4271 EV_FREQUENT_CHECK;
4272
2571 { 4273 {
2572 int active = ev_active (w); 4274 int active = ev_active (w);
2573 4275
2574 asyncs [active - 1] = asyncs [--asynccnt]; 4276 asyncs [active - 1] = asyncs [--asynccnt];
2575 ev_active (asyncs [active - 1]) = active; 4277 ev_active (asyncs [active - 1]) = active;
2576 } 4278 }
2577 4279
2578 ev_stop (EV_A_ (W)w); 4280 ev_stop (EV_A_ (W)w);
4281
4282 EV_FREQUENT_CHECK;
2579} 4283}
2580 4284
2581void 4285void
2582ev_async_send (EV_P_ ev_async *w) 4286ev_async_send (EV_P_ ev_async *w)
2583{ 4287{
2584 w->sent = 1; 4288 w->sent = 1;
2585 evpipe_write (EV_A_ &gotasync); 4289 evpipe_write (EV_A_ &async_pending);
2586} 4290}
2587#endif 4291#endif
2588 4292
2589/*****************************************************************************/ 4293/*****************************************************************************/
2590 4294
… …
2600once_cb (EV_P_ struct ev_once *once, int revents) 4304once_cb (EV_P_ struct ev_once *once, int revents)
2601{ 4305{
2602 void (*cb)(int revents, void *arg) = once->cb; 4306 void (*cb)(int revents, void *arg) = once->cb;
2603 void *arg = once->arg; 4307 void *arg = once->arg;
2604 4308
2605 ev_io_stop (EV_A_ &once->io); 4309 ev_io_stop (EV_A_ &once->io);
2606 ev_timer_stop (EV_A_ &once->to); 4310 ev_timer_stop (EV_A_ &once->to);
2607 ev_free (once); 4311 ev_free (once);
2608 4312
2609 cb (revents, arg); 4313 cb (revents, arg);
2610} 4314}
2611 4315
2612static void 4316static void
2613once_cb_io (EV_P_ ev_io *w, int revents) 4317once_cb_io (EV_P_ ev_io *w, int revents)
2614{ 4318{
2615 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4319 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4320
4321 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2616} 4322}
2617 4323
2618static void 4324static void
2619once_cb_to (EV_P_ ev_timer *w, int revents) 4325once_cb_to (EV_P_ ev_timer *w, int revents)
2620{ 4326{
2621 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4327 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4328
4329 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2622} 4330}
2623 4331
2624void 4332void
2625ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4333ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2626{ 4334{
2627 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4335 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2628 4336
2629 if (expect_false (!once)) 4337 if (expect_false (!once))
2630 { 4338 {
2631 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4339 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2632 return; 4340 return;
2633 } 4341 }
2634 4342
2635 once->cb = cb; 4343 once->cb = cb;
2636 once->arg = arg; 4344 once->arg = arg;
… …
2648 ev_timer_set (&once->to, timeout, 0.); 4356 ev_timer_set (&once->to, timeout, 0.);
2649 ev_timer_start (EV_A_ &once->to); 4357 ev_timer_start (EV_A_ &once->to);
2650 } 4358 }
2651} 4359}
2652 4360
4361/*****************************************************************************/
4362
4363#if EV_WALK_ENABLE
4364void ecb_cold
4365ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4366{
4367 int i, j;
4368 ev_watcher_list *wl, *wn;
4369
4370 if (types & (EV_IO | EV_EMBED))
4371 for (i = 0; i < anfdmax; ++i)
4372 for (wl = anfds [i].head; wl; )
4373 {
4374 wn = wl->next;
4375
4376#if EV_EMBED_ENABLE
4377 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4378 {
4379 if (types & EV_EMBED)
4380 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4381 }
4382 else
4383#endif
4384#if EV_USE_INOTIFY
4385 if (ev_cb ((ev_io *)wl) == infy_cb)
4386 ;
4387 else
4388#endif
4389 if ((ev_io *)wl != &pipe_w)
4390 if (types & EV_IO)
4391 cb (EV_A_ EV_IO, wl);
4392
4393 wl = wn;
4394 }
4395
4396 if (types & (EV_TIMER | EV_STAT))
4397 for (i = timercnt + HEAP0; i-- > HEAP0; )
4398#if EV_STAT_ENABLE
4399 /*TODO: timer is not always active*/
4400 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4401 {
4402 if (types & EV_STAT)
4403 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4404 }
4405 else
4406#endif
4407 if (types & EV_TIMER)
4408 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4409
4410#if EV_PERIODIC_ENABLE
4411 if (types & EV_PERIODIC)
4412 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4413 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4414#endif
4415
4416#if EV_IDLE_ENABLE
4417 if (types & EV_IDLE)
4418 for (j = NUMPRI; j--; )
4419 for (i = idlecnt [j]; i--; )
4420 cb (EV_A_ EV_IDLE, idles [j][i]);
4421#endif
4422
4423#if EV_FORK_ENABLE
4424 if (types & EV_FORK)
4425 for (i = forkcnt; i--; )
4426 if (ev_cb (forks [i]) != embed_fork_cb)
4427 cb (EV_A_ EV_FORK, forks [i]);
4428#endif
4429
4430#if EV_ASYNC_ENABLE
4431 if (types & EV_ASYNC)
4432 for (i = asynccnt; i--; )
4433 cb (EV_A_ EV_ASYNC, asyncs [i]);
4434#endif
4435
4436#if EV_PREPARE_ENABLE
4437 if (types & EV_PREPARE)
4438 for (i = preparecnt; i--; )
4439# if EV_EMBED_ENABLE
4440 if (ev_cb (prepares [i]) != embed_prepare_cb)
4441# endif
4442 cb (EV_A_ EV_PREPARE, prepares [i]);
4443#endif
4444
4445#if EV_CHECK_ENABLE
4446 if (types & EV_CHECK)
4447 for (i = checkcnt; i--; )
4448 cb (EV_A_ EV_CHECK, checks [i]);
4449#endif
4450
4451#if EV_SIGNAL_ENABLE
4452 if (types & EV_SIGNAL)
4453 for (i = 0; i < EV_NSIG - 1; ++i)
4454 for (wl = signals [i].head; wl; )
4455 {
4456 wn = wl->next;
4457 cb (EV_A_ EV_SIGNAL, wl);
4458 wl = wn;
4459 }
4460#endif
4461
4462#if EV_CHILD_ENABLE
4463 if (types & EV_CHILD)
4464 for (i = (EV_PID_HASHSIZE); i--; )
4465 for (wl = childs [i]; wl; )
4466 {
4467 wn = wl->next;
4468 cb (EV_A_ EV_CHILD, wl);
4469 wl = wn;
4470 }
4471#endif
4472/* EV_STAT 0x00001000 /* stat data changed */
4473/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4474}
4475#endif
4476
2653#if EV_MULTIPLICITY 4477#if EV_MULTIPLICITY
2654 #include "ev_wrap.h" 4478 #include "ev_wrap.h"
2655#endif 4479#endif
2656 4480
2657#ifdef __cplusplus
2658}
2659#endif
2660

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