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Comparing libev/ev.c (file contents):
Revision 1.223 by root, Sun Apr 6 14:34:50 2008 UTC vs.
Revision 1.411 by root, Tue Feb 21 04:34:02 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 #endif
583 #endif
584#endif
585
586#ifndef ECB_MEMORY_FENCE
587 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
588 #define ECB_MEMORY_FENCE __sync_synchronize ()
589 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
590 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
591 #elif _MSC_VER >= 1400 /* VC++ 2005 */
592 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
593 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
594 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
595 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
596 #elif defined(_WIN32)
597 #include <WinNT.h>
598 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
599 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
600 #include <mbarrier.h>
601 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
602 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
603 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
604 #endif
605#endif
606
607#ifndef ECB_MEMORY_FENCE
608 #if !ECB_AVOID_PTHREADS
609 /*
610 * if you get undefined symbol references to pthread_mutex_lock,
611 * or failure to find pthread.h, then you should implement
612 * the ECB_MEMORY_FENCE operations for your cpu/compiler
613 * OR provide pthread.h and link against the posix thread library
614 * of your system.
615 */
616 #include <pthread.h>
617 #define ECB_NEEDS_PTHREADS 1
618 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
619
620 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
621 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
622 #endif
623#endif
624
625#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
626 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
627#endif
628
629#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
630 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
631#endif
632
633/*****************************************************************************/
634
635#define ECB_C99 (__STDC_VERSION__ >= 199901L)
636
637#if __cplusplus
638 #define ecb_inline static inline
639#elif ECB_GCC_VERSION(2,5)
640 #define ecb_inline static __inline__
641#elif ECB_C99
642 #define ecb_inline static inline
643#else
644 #define ecb_inline static
645#endif
646
647#if ECB_GCC_VERSION(3,3)
648 #define ecb_restrict __restrict__
649#elif ECB_C99
650 #define ecb_restrict restrict
651#else
652 #define ecb_restrict
653#endif
654
655typedef int ecb_bool;
656
657#define ECB_CONCAT_(a, b) a ## b
658#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
659#define ECB_STRINGIFY_(a) # a
660#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
661
662#define ecb_function_ ecb_inline
663
664#if ECB_GCC_VERSION(3,1)
665 #define ecb_attribute(attrlist) __attribute__(attrlist)
666 #define ecb_is_constant(expr) __builtin_constant_p (expr)
667 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
668 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
669#else
670 #define ecb_attribute(attrlist)
671 #define ecb_is_constant(expr) 0
672 #define ecb_expect(expr,value) (expr)
673 #define ecb_prefetch(addr,rw,locality)
674#endif
675
676/* no emulation for ecb_decltype */
677#if ECB_GCC_VERSION(4,5)
678 #define ecb_decltype(x) __decltype(x)
679#elif ECB_GCC_VERSION(3,0)
680 #define ecb_decltype(x) __typeof(x)
681#endif
682
683#define ecb_noinline ecb_attribute ((__noinline__))
684#define ecb_noreturn ecb_attribute ((__noreturn__))
685#define ecb_unused ecb_attribute ((__unused__))
686#define ecb_const ecb_attribute ((__const__))
687#define ecb_pure ecb_attribute ((__pure__))
688
689#if ECB_GCC_VERSION(4,3)
690 #define ecb_artificial ecb_attribute ((__artificial__))
691 #define ecb_hot ecb_attribute ((__hot__))
692 #define ecb_cold ecb_attribute ((__cold__))
693#else
694 #define ecb_artificial
695 #define ecb_hot
696 #define ecb_cold
697#endif
698
699/* put around conditional expressions if you are very sure that the */
700/* expression is mostly true or mostly false. note that these return */
701/* booleans, not the expression. */
310#define expect_false(expr) expect ((expr) != 0, 0) 702#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
311#define expect_true(expr) expect ((expr) != 0, 1) 703#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
704/* for compatibility to the rest of the world */
705#define ecb_likely(expr) ecb_expect_true (expr)
706#define ecb_unlikely(expr) ecb_expect_false (expr)
707
708/* count trailing zero bits and count # of one bits */
709#if ECB_GCC_VERSION(3,4)
710 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
711 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
712 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
713 #define ecb_ctz32(x) __builtin_ctz (x)
714 #define ecb_ctz64(x) __builtin_ctzll (x)
715 #define ecb_popcount32(x) __builtin_popcount (x)
716 /* no popcountll */
717#else
718 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
719 ecb_function_ int
720 ecb_ctz32 (uint32_t x)
721 {
722 int r = 0;
723
724 x &= ~x + 1; /* this isolates the lowest bit */
725
726#if ECB_branchless_on_i386
727 r += !!(x & 0xaaaaaaaa) << 0;
728 r += !!(x & 0xcccccccc) << 1;
729 r += !!(x & 0xf0f0f0f0) << 2;
730 r += !!(x & 0xff00ff00) << 3;
731 r += !!(x & 0xffff0000) << 4;
732#else
733 if (x & 0xaaaaaaaa) r += 1;
734 if (x & 0xcccccccc) r += 2;
735 if (x & 0xf0f0f0f0) r += 4;
736 if (x & 0xff00ff00) r += 8;
737 if (x & 0xffff0000) r += 16;
738#endif
739
740 return r;
741 }
742
743 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
744 ecb_function_ int
745 ecb_ctz64 (uint64_t x)
746 {
747 int shift = x & 0xffffffffU ? 0 : 32;
748 return ecb_ctz32 (x >> shift) + shift;
749 }
750
751 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
752 ecb_function_ int
753 ecb_popcount32 (uint32_t x)
754 {
755 x -= (x >> 1) & 0x55555555;
756 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
757 x = ((x >> 4) + x) & 0x0f0f0f0f;
758 x *= 0x01010101;
759
760 return x >> 24;
761 }
762
763 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
764 ecb_function_ int ecb_ld32 (uint32_t x)
765 {
766 int r = 0;
767
768 if (x >> 16) { x >>= 16; r += 16; }
769 if (x >> 8) { x >>= 8; r += 8; }
770 if (x >> 4) { x >>= 4; r += 4; }
771 if (x >> 2) { x >>= 2; r += 2; }
772 if (x >> 1) { r += 1; }
773
774 return r;
775 }
776
777 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
778 ecb_function_ int ecb_ld64 (uint64_t x)
779 {
780 int r = 0;
781
782 if (x >> 32) { x >>= 32; r += 32; }
783
784 return r + ecb_ld32 (x);
785 }
786#endif
787
788ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
789ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
790{
791 return ( (x * 0x0802U & 0x22110U)
792 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
793}
794
795ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
796ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
797{
798 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
799 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
800 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
801 x = ( x >> 8 ) | ( x << 8);
802
803 return x;
804}
805
806ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
807ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
808{
809 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
810 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
811 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
812 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
813 x = ( x >> 16 ) | ( x << 16);
814
815 return x;
816}
817
818/* popcount64 is only available on 64 bit cpus as gcc builtin */
819/* so for this version we are lazy */
820ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
821ecb_function_ int
822ecb_popcount64 (uint64_t x)
823{
824 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
825}
826
827ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
828ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
829ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
830ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
831ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
832ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
833ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
834ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
835
836ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
837ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
838ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
839ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
840ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
841ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
842ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
843ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
844
845#if ECB_GCC_VERSION(4,3)
846 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
847 #define ecb_bswap32(x) __builtin_bswap32 (x)
848 #define ecb_bswap64(x) __builtin_bswap64 (x)
849#else
850 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
851 ecb_function_ uint16_t
852 ecb_bswap16 (uint16_t x)
853 {
854 return ecb_rotl16 (x, 8);
855 }
856
857 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
858 ecb_function_ uint32_t
859 ecb_bswap32 (uint32_t x)
860 {
861 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
862 }
863
864 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
865 ecb_function_ uint64_t
866 ecb_bswap64 (uint64_t x)
867 {
868 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
869 }
870#endif
871
872#if ECB_GCC_VERSION(4,5)
873 #define ecb_unreachable() __builtin_unreachable ()
874#else
875 /* this seems to work fine, but gcc always emits a warning for it :/ */
876 ecb_inline void ecb_unreachable (void) ecb_noreturn;
877 ecb_inline void ecb_unreachable (void) { }
878#endif
879
880/* try to tell the compiler that some condition is definitely true */
881#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
882
883ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
884ecb_inline unsigned char
885ecb_byteorder_helper (void)
886{
887 const uint32_t u = 0x11223344;
888 return *(unsigned char *)&u;
889}
890
891ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
892ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
893ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
894ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
895
896#if ECB_GCC_VERSION(3,0) || ECB_C99
897 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
898#else
899 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
900#endif
901
902#if __cplusplus
903 template<typename T>
904 static inline T ecb_div_rd (T val, T div)
905 {
906 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
907 }
908 template<typename T>
909 static inline T ecb_div_ru (T val, T div)
910 {
911 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
912 }
913#else
914 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
915 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
916#endif
917
918#if ecb_cplusplus_does_not_suck
919 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
920 template<typename T, int N>
921 static inline int ecb_array_length (const T (&arr)[N])
922 {
923 return N;
924 }
925#else
926 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
927#endif
928
929#endif
930
931/* ECB.H END */
932
933#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
934/* if your architecture doesn't need memory fences, e.g. because it is
935 * single-cpu/core, or if you use libev in a project that doesn't use libev
936 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
937 * libev, in which cases the memory fences become nops.
938 * alternatively, you can remove this #error and link against libpthread,
939 * which will then provide the memory fences.
940 */
941# error "memory fences not defined for your architecture, please report"
942#endif
943
944#ifndef ECB_MEMORY_FENCE
945# define ECB_MEMORY_FENCE do { } while (0)
946# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
947# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
948#endif
949
950#define expect_false(cond) ecb_expect_false (cond)
951#define expect_true(cond) ecb_expect_true (cond)
952#define noinline ecb_noinline
953
312#define inline_size static inline 954#define inline_size ecb_inline
313 955
314#if EV_MINIMAL 956#if EV_FEATURE_CODE
957# define inline_speed ecb_inline
958#else
315# define inline_speed static noinline 959# define inline_speed static noinline
960#endif
961
962#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
963
964#if EV_MINPRI == EV_MAXPRI
965# define ABSPRI(w) (((W)w), 0)
316#else 966#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) 967# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
968#endif
322 969
323#define EMPTY /* required for microsofts broken pseudo-c compiler */ 970#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */ 971#define EMPTY2(a,b) /* used to suppress some warnings */
325 972
326typedef ev_watcher *W; 973typedef ev_watcher *W;
327typedef ev_watcher_list *WL; 974typedef ev_watcher_list *WL;
328typedef ev_watcher_time *WT; 975typedef ev_watcher_time *WT;
329 976
977#define ev_active(w) ((W)(w))->active
978#define ev_at(w) ((WT)(w))->at
979
980#if EV_USE_REALTIME
981/* sig_atomic_t is used to avoid per-thread variables or locking but still */
982/* giving it a reasonably high chance of working on typical architectures */
983static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
984#endif
985
330#if EV_USE_MONOTONIC 986#if EV_USE_MONOTONIC
331/* sig_atomic_t is used to avoid per-thread variables or locking but still */
332/* giving it a reasonably high chance of working on typical architetcures */
333static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 987static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
988#endif
989
990#ifndef EV_FD_TO_WIN32_HANDLE
991# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
992#endif
993#ifndef EV_WIN32_HANDLE_TO_FD
994# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
995#endif
996#ifndef EV_WIN32_CLOSE_FD
997# define EV_WIN32_CLOSE_FD(fd) close (fd)
334#endif 998#endif
335 999
336#ifdef _WIN32 1000#ifdef _WIN32
337# include "ev_win32.c" 1001# include "ev_win32.c"
338#endif 1002#endif
339 1003
340/*****************************************************************************/ 1004/*****************************************************************************/
341 1005
1006/* define a suitable floor function (only used by periodics atm) */
1007
1008#if EV_USE_FLOOR
1009# include <math.h>
1010# define ev_floor(v) floor (v)
1011#else
1012
1013#include <float.h>
1014
1015/* a floor() replacement function, should be independent of ev_tstamp type */
1016static ev_tstamp noinline
1017ev_floor (ev_tstamp v)
1018{
1019 /* the choice of shift factor is not terribly important */
1020#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1021 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1022#else
1023 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1024#endif
1025
1026 /* argument too large for an unsigned long? */
1027 if (expect_false (v >= shift))
1028 {
1029 ev_tstamp f;
1030
1031 if (v == v - 1.)
1032 return v; /* very large number */
1033
1034 f = shift * ev_floor (v * (1. / shift));
1035 return f + ev_floor (v - f);
1036 }
1037
1038 /* special treatment for negative args? */
1039 if (expect_false (v < 0.))
1040 {
1041 ev_tstamp f = -ev_floor (-v);
1042
1043 return f - (f == v ? 0 : 1);
1044 }
1045
1046 /* fits into an unsigned long */
1047 return (unsigned long)v;
1048}
1049
1050#endif
1051
1052/*****************************************************************************/
1053
1054#ifdef __linux
1055# include <sys/utsname.h>
1056#endif
1057
1058static unsigned int noinline ecb_cold
1059ev_linux_version (void)
1060{
1061#ifdef __linux
1062 unsigned int v = 0;
1063 struct utsname buf;
1064 int i;
1065 char *p = buf.release;
1066
1067 if (uname (&buf))
1068 return 0;
1069
1070 for (i = 3+1; --i; )
1071 {
1072 unsigned int c = 0;
1073
1074 for (;;)
1075 {
1076 if (*p >= '0' && *p <= '9')
1077 c = c * 10 + *p++ - '0';
1078 else
1079 {
1080 p += *p == '.';
1081 break;
1082 }
1083 }
1084
1085 v = (v << 8) | c;
1086 }
1087
1088 return v;
1089#else
1090 return 0;
1091#endif
1092}
1093
1094/*****************************************************************************/
1095
1096#if EV_AVOID_STDIO
1097static void noinline ecb_cold
1098ev_printerr (const char *msg)
1099{
1100 write (STDERR_FILENO, msg, strlen (msg));
1101}
1102#endif
1103
342static void (*syserr_cb)(const char *msg); 1104static void (*syserr_cb)(const char *msg);
343 1105
344void 1106void ecb_cold
345ev_set_syserr_cb (void (*cb)(const char *msg)) 1107ev_set_syserr_cb (void (*cb)(const char *msg))
346{ 1108{
347 syserr_cb = cb; 1109 syserr_cb = cb;
348} 1110}
349 1111
350static void noinline 1112static void noinline ecb_cold
351syserr (const char *msg) 1113ev_syserr (const char *msg)
352{ 1114{
353 if (!msg) 1115 if (!msg)
354 msg = "(libev) system error"; 1116 msg = "(libev) system error";
355 1117
356 if (syserr_cb) 1118 if (syserr_cb)
357 syserr_cb (msg); 1119 syserr_cb (msg);
358 else 1120 else
359 { 1121 {
1122#if EV_AVOID_STDIO
1123 ev_printerr (msg);
1124 ev_printerr (": ");
1125 ev_printerr (strerror (errno));
1126 ev_printerr ("\n");
1127#else
360 perror (msg); 1128 perror (msg);
1129#endif
361 abort (); 1130 abort ();
362 } 1131 }
363} 1132}
364 1133
1134static void *
1135ev_realloc_emul (void *ptr, long size)
1136{
1137#if __GLIBC__
1138 return realloc (ptr, size);
1139#else
1140 /* some systems, notably openbsd and darwin, fail to properly
1141 * implement realloc (x, 0) (as required by both ansi c-89 and
1142 * the single unix specification, so work around them here.
1143 */
1144
1145 if (size)
1146 return realloc (ptr, size);
1147
1148 free (ptr);
1149 return 0;
1150#endif
1151}
1152
365static void *(*alloc)(void *ptr, long size); 1153static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
366 1154
367void 1155void ecb_cold
368ev_set_allocator (void *(*cb)(void *ptr, long size)) 1156ev_set_allocator (void *(*cb)(void *ptr, long size))
369{ 1157{
370 alloc = cb; 1158 alloc = cb;
371} 1159}
372 1160
373inline_speed void * 1161inline_speed void *
374ev_realloc (void *ptr, long size) 1162ev_realloc (void *ptr, long size)
375{ 1163{
376 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1164 ptr = alloc (ptr, size);
377 1165
378 if (!ptr && size) 1166 if (!ptr && size)
379 { 1167 {
1168#if EV_AVOID_STDIO
1169 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1170#else
380 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1171 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1172#endif
381 abort (); 1173 abort ();
382 } 1174 }
383 1175
384 return ptr; 1176 return ptr;
385} 1177}
… …
387#define ev_malloc(size) ev_realloc (0, (size)) 1179#define ev_malloc(size) ev_realloc (0, (size))
388#define ev_free(ptr) ev_realloc ((ptr), 0) 1180#define ev_free(ptr) ev_realloc ((ptr), 0)
389 1181
390/*****************************************************************************/ 1182/*****************************************************************************/
391 1183
1184/* set in reify when reification needed */
1185#define EV_ANFD_REIFY 1
1186
1187/* file descriptor info structure */
392typedef struct 1188typedef struct
393{ 1189{
394 WL head; 1190 WL head;
395 unsigned char events; 1191 unsigned char events; /* the events watched for */
1192 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1193 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
396 unsigned char reify; 1194 unsigned char unused;
1195#if EV_USE_EPOLL
1196 unsigned int egen; /* generation counter to counter epoll bugs */
1197#endif
397#if EV_SELECT_IS_WINSOCKET 1198#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
398 SOCKET handle; 1199 SOCKET handle;
399#endif 1200#endif
1201#if EV_USE_IOCP
1202 OVERLAPPED or, ow;
1203#endif
400} ANFD; 1204} ANFD;
401 1205
1206/* stores the pending event set for a given watcher */
402typedef struct 1207typedef struct
403{ 1208{
404 W w; 1209 W w;
405 int events; 1210 int events; /* the pending event set for the given watcher */
406} ANPENDING; 1211} ANPENDING;
407 1212
408#if EV_USE_INOTIFY 1213#if EV_USE_INOTIFY
1214/* hash table entry per inotify-id */
409typedef struct 1215typedef struct
410{ 1216{
411 WL head; 1217 WL head;
412} ANFS; 1218} ANFS;
1219#endif
1220
1221/* Heap Entry */
1222#if EV_HEAP_CACHE_AT
1223 /* a heap element */
1224 typedef struct {
1225 ev_tstamp at;
1226 WT w;
1227 } ANHE;
1228
1229 #define ANHE_w(he) (he).w /* access watcher, read-write */
1230 #define ANHE_at(he) (he).at /* access cached at, read-only */
1231 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1232#else
1233 /* a heap element */
1234 typedef WT ANHE;
1235
1236 #define ANHE_w(he) (he)
1237 #define ANHE_at(he) (he)->at
1238 #define ANHE_at_cache(he)
413#endif 1239#endif
414 1240
415#if EV_MULTIPLICITY 1241#if EV_MULTIPLICITY
416 1242
417 struct ev_loop 1243 struct ev_loop
… …
423 #undef VAR 1249 #undef VAR
424 }; 1250 };
425 #include "ev_wrap.h" 1251 #include "ev_wrap.h"
426 1252
427 static struct ev_loop default_loop_struct; 1253 static struct ev_loop default_loop_struct;
428 struct ev_loop *ev_default_loop_ptr; 1254 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
429 1255
430#else 1256#else
431 1257
432 ev_tstamp ev_rt_now; 1258 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
433 #define VAR(name,decl) static decl; 1259 #define VAR(name,decl) static decl;
434 #include "ev_vars.h" 1260 #include "ev_vars.h"
435 #undef VAR 1261 #undef VAR
436 1262
437 static int ev_default_loop_ptr; 1263 static int ev_default_loop_ptr;
438 1264
439#endif 1265#endif
440 1266
1267#if EV_FEATURE_API
1268# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1269# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1270# define EV_INVOKE_PENDING invoke_cb (EV_A)
1271#else
1272# define EV_RELEASE_CB (void)0
1273# define EV_ACQUIRE_CB (void)0
1274# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1275#endif
1276
1277#define EVBREAK_RECURSE 0x80
1278
441/*****************************************************************************/ 1279/*****************************************************************************/
442 1280
1281#ifndef EV_HAVE_EV_TIME
443ev_tstamp 1282ev_tstamp
444ev_time (void) 1283ev_time (void)
445{ 1284{
446#if EV_USE_REALTIME 1285#if EV_USE_REALTIME
1286 if (expect_true (have_realtime))
1287 {
447 struct timespec ts; 1288 struct timespec ts;
448 clock_gettime (CLOCK_REALTIME, &ts); 1289 clock_gettime (CLOCK_REALTIME, &ts);
449 return ts.tv_sec + ts.tv_nsec * 1e-9; 1290 return ts.tv_sec + ts.tv_nsec * 1e-9;
450#else 1291 }
1292#endif
1293
451 struct timeval tv; 1294 struct timeval tv;
452 gettimeofday (&tv, 0); 1295 gettimeofday (&tv, 0);
453 return tv.tv_sec + tv.tv_usec * 1e-6; 1296 return tv.tv_sec + tv.tv_usec * 1e-6;
454#endif
455} 1297}
1298#endif
456 1299
457ev_tstamp inline_size 1300inline_size ev_tstamp
458get_clock (void) 1301get_clock (void)
459{ 1302{
460#if EV_USE_MONOTONIC 1303#if EV_USE_MONOTONIC
461 if (expect_true (have_monotonic)) 1304 if (expect_true (have_monotonic))
462 { 1305 {
… …
483 if (delay > 0.) 1326 if (delay > 0.)
484 { 1327 {
485#if EV_USE_NANOSLEEP 1328#if EV_USE_NANOSLEEP
486 struct timespec ts; 1329 struct timespec ts;
487 1330
488 ts.tv_sec = (time_t)delay; 1331 EV_TS_SET (ts, delay);
489 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
490
491 nanosleep (&ts, 0); 1332 nanosleep (&ts, 0);
492#elif defined(_WIN32) 1333#elif defined(_WIN32)
493 Sleep ((unsigned long)(delay * 1e3)); 1334 Sleep ((unsigned long)(delay * 1e3));
494#else 1335#else
495 struct timeval tv; 1336 struct timeval tv;
496 1337
497 tv.tv_sec = (time_t)delay; 1338 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
498 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1339 /* something not guaranteed by newer posix versions, but guaranteed */
499 1340 /* by older ones */
1341 EV_TV_SET (tv, delay);
500 select (0, 0, 0, 0, &tv); 1342 select (0, 0, 0, 0, &tv);
501#endif 1343#endif
502 } 1344 }
503} 1345}
504 1346
505/*****************************************************************************/ 1347/*****************************************************************************/
506 1348
507int inline_size 1349#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1350
1351/* find a suitable new size for the given array, */
1352/* hopefully by rounding to a nice-to-malloc size */
1353inline_size int
508array_nextsize (int elem, int cur, int cnt) 1354array_nextsize (int elem, int cur, int cnt)
509{ 1355{
510 int ncur = cur + 1; 1356 int ncur = cur + 1;
511 1357
512 do 1358 do
513 ncur <<= 1; 1359 ncur <<= 1;
514 while (cnt > ncur); 1360 while (cnt > ncur);
515 1361
516 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1362 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
517 if (elem * ncur > 4096) 1363 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
518 { 1364 {
519 ncur *= elem; 1365 ncur *= elem;
520 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1366 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
521 ncur = ncur - sizeof (void *) * 4; 1367 ncur = ncur - sizeof (void *) * 4;
522 ncur /= elem; 1368 ncur /= elem;
523 } 1369 }
524 1370
525 return ncur; 1371 return ncur;
526} 1372}
527 1373
528static noinline void * 1374static void * noinline ecb_cold
529array_realloc (int elem, void *base, int *cur, int cnt) 1375array_realloc (int elem, void *base, int *cur, int cnt)
530{ 1376{
531 *cur = array_nextsize (elem, *cur, cnt); 1377 *cur = array_nextsize (elem, *cur, cnt);
532 return ev_realloc (base, elem * *cur); 1378 return ev_realloc (base, elem * *cur);
533} 1379}
1380
1381#define array_init_zero(base,count) \
1382 memset ((void *)(base), 0, sizeof (*(base)) * (count))
534 1383
535#define array_needsize(type,base,cur,cnt,init) \ 1384#define array_needsize(type,base,cur,cnt,init) \
536 if (expect_false ((cnt) > (cur))) \ 1385 if (expect_false ((cnt) > (cur))) \
537 { \ 1386 { \
538 int ocur_ = (cur); \ 1387 int ecb_unused ocur_ = (cur); \
539 (base) = (type *)array_realloc \ 1388 (base) = (type *)array_realloc \
540 (sizeof (type), (base), &(cur), (cnt)); \ 1389 (sizeof (type), (base), &(cur), (cnt)); \
541 init ((base) + (ocur_), (cur) - ocur_); \ 1390 init ((base) + (ocur_), (cur) - ocur_); \
542 } 1391 }
543 1392
… …
550 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1399 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
551 } 1400 }
552#endif 1401#endif
553 1402
554#define array_free(stem, idx) \ 1403#define array_free(stem, idx) \
555 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1404 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
556 1405
557/*****************************************************************************/ 1406/*****************************************************************************/
1407
1408/* dummy callback for pending events */
1409static void noinline
1410pendingcb (EV_P_ ev_prepare *w, int revents)
1411{
1412}
558 1413
559void noinline 1414void noinline
560ev_feed_event (EV_P_ void *w, int revents) 1415ev_feed_event (EV_P_ void *w, int revents)
561{ 1416{
562 W w_ = (W)w; 1417 W w_ = (W)w;
… …
571 pendings [pri][w_->pending - 1].w = w_; 1426 pendings [pri][w_->pending - 1].w = w_;
572 pendings [pri][w_->pending - 1].events = revents; 1427 pendings [pri][w_->pending - 1].events = revents;
573 } 1428 }
574} 1429}
575 1430
576void inline_speed 1431inline_speed void
1432feed_reverse (EV_P_ W w)
1433{
1434 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1435 rfeeds [rfeedcnt++] = w;
1436}
1437
1438inline_size void
1439feed_reverse_done (EV_P_ int revents)
1440{
1441 do
1442 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1443 while (rfeedcnt);
1444}
1445
1446inline_speed void
577queue_events (EV_P_ W *events, int eventcnt, int type) 1447queue_events (EV_P_ W *events, int eventcnt, int type)
578{ 1448{
579 int i; 1449 int i;
580 1450
581 for (i = 0; i < eventcnt; ++i) 1451 for (i = 0; i < eventcnt; ++i)
582 ev_feed_event (EV_A_ events [i], type); 1452 ev_feed_event (EV_A_ events [i], type);
583} 1453}
584 1454
585/*****************************************************************************/ 1455/*****************************************************************************/
586 1456
587void inline_size 1457inline_speed void
588anfds_init (ANFD *base, int count)
589{
590 while (count--)
591 {
592 base->head = 0;
593 base->events = EV_NONE;
594 base->reify = 0;
595
596 ++base;
597 }
598}
599
600void inline_speed
601fd_event (EV_P_ int fd, int revents) 1458fd_event_nocheck (EV_P_ int fd, int revents)
602{ 1459{
603 ANFD *anfd = anfds + fd; 1460 ANFD *anfd = anfds + fd;
604 ev_io *w; 1461 ev_io *w;
605 1462
606 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1463 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
610 if (ev) 1467 if (ev)
611 ev_feed_event (EV_A_ (W)w, ev); 1468 ev_feed_event (EV_A_ (W)w, ev);
612 } 1469 }
613} 1470}
614 1471
1472/* do not submit kernel events for fds that have reify set */
1473/* because that means they changed while we were polling for new events */
1474inline_speed void
1475fd_event (EV_P_ int fd, int revents)
1476{
1477 ANFD *anfd = anfds + fd;
1478
1479 if (expect_true (!anfd->reify))
1480 fd_event_nocheck (EV_A_ fd, revents);
1481}
1482
615void 1483void
616ev_feed_fd_event (EV_P_ int fd, int revents) 1484ev_feed_fd_event (EV_P_ int fd, int revents)
617{ 1485{
618 if (fd >= 0 && fd < anfdmax) 1486 if (fd >= 0 && fd < anfdmax)
619 fd_event (EV_A_ fd, revents); 1487 fd_event_nocheck (EV_A_ fd, revents);
620} 1488}
621 1489
622void inline_size 1490/* make sure the external fd watch events are in-sync */
1491/* with the kernel/libev internal state */
1492inline_size void
623fd_reify (EV_P) 1493fd_reify (EV_P)
624{ 1494{
625 int i; 1495 int i;
1496
1497#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1498 for (i = 0; i < fdchangecnt; ++i)
1499 {
1500 int fd = fdchanges [i];
1501 ANFD *anfd = anfds + fd;
1502
1503 if (anfd->reify & EV__IOFDSET && anfd->head)
1504 {
1505 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1506
1507 if (handle != anfd->handle)
1508 {
1509 unsigned long arg;
1510
1511 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1512
1513 /* handle changed, but fd didn't - we need to do it in two steps */
1514 backend_modify (EV_A_ fd, anfd->events, 0);
1515 anfd->events = 0;
1516 anfd->handle = handle;
1517 }
1518 }
1519 }
1520#endif
626 1521
627 for (i = 0; i < fdchangecnt; ++i) 1522 for (i = 0; i < fdchangecnt; ++i)
628 { 1523 {
629 int fd = fdchanges [i]; 1524 int fd = fdchanges [i];
630 ANFD *anfd = anfds + fd; 1525 ANFD *anfd = anfds + fd;
631 ev_io *w; 1526 ev_io *w;
632 1527
633 unsigned char events = 0; 1528 unsigned char o_events = anfd->events;
1529 unsigned char o_reify = anfd->reify;
634 1530
635 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1531 anfd->reify = 0;
636 events |= (unsigned char)w->events;
637 1532
638#if EV_SELECT_IS_WINSOCKET 1533 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
639 if (events)
640 { 1534 {
641 unsigned long argp; 1535 anfd->events = 0;
642 #ifdef EV_FD_TO_WIN32_HANDLE 1536
643 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1537 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
644 #else 1538 anfd->events |= (unsigned char)w->events;
645 anfd->handle = _get_osfhandle (fd); 1539
646 #endif 1540 if (o_events != anfd->events)
647 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1541 o_reify = EV__IOFDSET; /* actually |= */
648 } 1542 }
649#endif
650 1543
651 { 1544 if (o_reify & EV__IOFDSET)
652 unsigned char o_events = anfd->events;
653 unsigned char o_reify = anfd->reify;
654
655 anfd->reify = 0;
656 anfd->events = events;
657
658 if (o_events != events || o_reify & EV_IOFDSET)
659 backend_modify (EV_A_ fd, o_events, events); 1545 backend_modify (EV_A_ fd, o_events, anfd->events);
660 }
661 } 1546 }
662 1547
663 fdchangecnt = 0; 1548 fdchangecnt = 0;
664} 1549}
665 1550
666void inline_size 1551/* something about the given fd changed */
1552inline_size void
667fd_change (EV_P_ int fd, int flags) 1553fd_change (EV_P_ int fd, int flags)
668{ 1554{
669 unsigned char reify = anfds [fd].reify; 1555 unsigned char reify = anfds [fd].reify;
670 anfds [fd].reify |= flags; 1556 anfds [fd].reify |= flags;
671 1557
… …
675 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1561 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
676 fdchanges [fdchangecnt - 1] = fd; 1562 fdchanges [fdchangecnt - 1] = fd;
677 } 1563 }
678} 1564}
679 1565
680void inline_speed 1566/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1567inline_speed void ecb_cold
681fd_kill (EV_P_ int fd) 1568fd_kill (EV_P_ int fd)
682{ 1569{
683 ev_io *w; 1570 ev_io *w;
684 1571
685 while ((w = (ev_io *)anfds [fd].head)) 1572 while ((w = (ev_io *)anfds [fd].head))
… …
687 ev_io_stop (EV_A_ w); 1574 ev_io_stop (EV_A_ w);
688 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1575 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
689 } 1576 }
690} 1577}
691 1578
692int inline_size 1579/* check whether the given fd is actually valid, for error recovery */
1580inline_size int ecb_cold
693fd_valid (int fd) 1581fd_valid (int fd)
694{ 1582{
695#ifdef _WIN32 1583#ifdef _WIN32
696 return _get_osfhandle (fd) != -1; 1584 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
697#else 1585#else
698 return fcntl (fd, F_GETFD) != -1; 1586 return fcntl (fd, F_GETFD) != -1;
699#endif 1587#endif
700} 1588}
701 1589
702/* called on EBADF to verify fds */ 1590/* called on EBADF to verify fds */
703static void noinline 1591static void noinline ecb_cold
704fd_ebadf (EV_P) 1592fd_ebadf (EV_P)
705{ 1593{
706 int fd; 1594 int fd;
707 1595
708 for (fd = 0; fd < anfdmax; ++fd) 1596 for (fd = 0; fd < anfdmax; ++fd)
709 if (anfds [fd].events) 1597 if (anfds [fd].events)
710 if (!fd_valid (fd) == -1 && errno == EBADF) 1598 if (!fd_valid (fd) && errno == EBADF)
711 fd_kill (EV_A_ fd); 1599 fd_kill (EV_A_ fd);
712} 1600}
713 1601
714/* called on ENOMEM in select/poll to kill some fds and retry */ 1602/* called on ENOMEM in select/poll to kill some fds and retry */
715static void noinline 1603static void noinline ecb_cold
716fd_enomem (EV_P) 1604fd_enomem (EV_P)
717{ 1605{
718 int fd; 1606 int fd;
719 1607
720 for (fd = anfdmax; fd--; ) 1608 for (fd = anfdmax; fd--; )
721 if (anfds [fd].events) 1609 if (anfds [fd].events)
722 { 1610 {
723 fd_kill (EV_A_ fd); 1611 fd_kill (EV_A_ fd);
724 return; 1612 break;
725 } 1613 }
726} 1614}
727 1615
728/* usually called after fork if backend needs to re-arm all fds from scratch */ 1616/* usually called after fork if backend needs to re-arm all fds from scratch */
729static void noinline 1617static void noinline
… …
733 1621
734 for (fd = 0; fd < anfdmax; ++fd) 1622 for (fd = 0; fd < anfdmax; ++fd)
735 if (anfds [fd].events) 1623 if (anfds [fd].events)
736 { 1624 {
737 anfds [fd].events = 0; 1625 anfds [fd].events = 0;
1626 anfds [fd].emask = 0;
738 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1627 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
739 } 1628 }
740} 1629}
741 1630
742/*****************************************************************************/ 1631/* used to prepare libev internal fd's */
743 1632/* this is not fork-safe */
744void inline_speed 1633inline_speed void
745upheap (WT *heap, int k)
746{
747 WT w = heap [k];
748
749 while (k)
750 {
751 int p = (k - 1) >> 1;
752
753 if (heap [p]->at <= w->at)
754 break;
755
756 heap [k] = heap [p];
757 ((W)heap [k])->active = k + 1;
758 k = p;
759 }
760
761 heap [k] = w;
762 ((W)heap [k])->active = k + 1;
763}
764
765void inline_speed
766downheap (WT *heap, int N, int k)
767{
768 WT w = heap [k];
769
770 for (;;)
771 {
772 int c = (k << 1) + 1;
773
774 if (c >= N)
775 break;
776
777 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
778 ? 1 : 0;
779
780 if (w->at <= heap [c]->at)
781 break;
782
783 heap [k] = heap [c];
784 ((W)heap [k])->active = k + 1;
785
786 k = c;
787 }
788
789 heap [k] = w;
790 ((W)heap [k])->active = k + 1;
791}
792
793void inline_size
794adjustheap (WT *heap, int N, int k)
795{
796 upheap (heap, k);
797 downheap (heap, N, k);
798}
799
800/*****************************************************************************/
801
802typedef struct
803{
804 WL head;
805 EV_ATOMIC_T gotsig;
806} ANSIG;
807
808static ANSIG *signals;
809static int signalmax;
810
811static EV_ATOMIC_T gotsig;
812
813void inline_size
814signals_init (ANSIG *base, int count)
815{
816 while (count--)
817 {
818 base->head = 0;
819 base->gotsig = 0;
820
821 ++base;
822 }
823}
824
825/*****************************************************************************/
826
827void inline_speed
828fd_intern (int fd) 1634fd_intern (int fd)
829{ 1635{
830#ifdef _WIN32 1636#ifdef _WIN32
831 int arg = 1; 1637 unsigned long arg = 1;
832 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1638 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
833#else 1639#else
834 fcntl (fd, F_SETFD, FD_CLOEXEC); 1640 fcntl (fd, F_SETFD, FD_CLOEXEC);
835 fcntl (fd, F_SETFL, O_NONBLOCK); 1641 fcntl (fd, F_SETFL, O_NONBLOCK);
836#endif 1642#endif
837} 1643}
838 1644
1645/*****************************************************************************/
1646
1647/*
1648 * the heap functions want a real array index. array index 0 is guaranteed to not
1649 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1650 * the branching factor of the d-tree.
1651 */
1652
1653/*
1654 * at the moment we allow libev the luxury of two heaps,
1655 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1656 * which is more cache-efficient.
1657 * the difference is about 5% with 50000+ watchers.
1658 */
1659#if EV_USE_4HEAP
1660
1661#define DHEAP 4
1662#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1663#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1664#define UPHEAP_DONE(p,k) ((p) == (k))
1665
1666/* away from the root */
1667inline_speed void
1668downheap (ANHE *heap, int N, int k)
1669{
1670 ANHE he = heap [k];
1671 ANHE *E = heap + N + HEAP0;
1672
1673 for (;;)
1674 {
1675 ev_tstamp minat;
1676 ANHE *minpos;
1677 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1678
1679 /* find minimum child */
1680 if (expect_true (pos + DHEAP - 1 < E))
1681 {
1682 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1683 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1684 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1685 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1686 }
1687 else if (pos < E)
1688 {
1689 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1690 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1691 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1692 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1693 }
1694 else
1695 break;
1696
1697 if (ANHE_at (he) <= minat)
1698 break;
1699
1700 heap [k] = *minpos;
1701 ev_active (ANHE_w (*minpos)) = k;
1702
1703 k = minpos - heap;
1704 }
1705
1706 heap [k] = he;
1707 ev_active (ANHE_w (he)) = k;
1708}
1709
1710#else /* 4HEAP */
1711
1712#define HEAP0 1
1713#define HPARENT(k) ((k) >> 1)
1714#define UPHEAP_DONE(p,k) (!(p))
1715
1716/* away from the root */
1717inline_speed void
1718downheap (ANHE *heap, int N, int k)
1719{
1720 ANHE he = heap [k];
1721
1722 for (;;)
1723 {
1724 int c = k << 1;
1725
1726 if (c >= N + HEAP0)
1727 break;
1728
1729 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1730 ? 1 : 0;
1731
1732 if (ANHE_at (he) <= ANHE_at (heap [c]))
1733 break;
1734
1735 heap [k] = heap [c];
1736 ev_active (ANHE_w (heap [k])) = k;
1737
1738 k = c;
1739 }
1740
1741 heap [k] = he;
1742 ev_active (ANHE_w (he)) = k;
1743}
1744#endif
1745
1746/* towards the root */
1747inline_speed void
1748upheap (ANHE *heap, int k)
1749{
1750 ANHE he = heap [k];
1751
1752 for (;;)
1753 {
1754 int p = HPARENT (k);
1755
1756 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1757 break;
1758
1759 heap [k] = heap [p];
1760 ev_active (ANHE_w (heap [k])) = k;
1761 k = p;
1762 }
1763
1764 heap [k] = he;
1765 ev_active (ANHE_w (he)) = k;
1766}
1767
1768/* move an element suitably so it is in a correct place */
1769inline_size void
1770adjustheap (ANHE *heap, int N, int k)
1771{
1772 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1773 upheap (heap, k);
1774 else
1775 downheap (heap, N, k);
1776}
1777
1778/* rebuild the heap: this function is used only once and executed rarely */
1779inline_size void
1780reheap (ANHE *heap, int N)
1781{
1782 int i;
1783
1784 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1785 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1786 for (i = 0; i < N; ++i)
1787 upheap (heap, i + HEAP0);
1788}
1789
1790/*****************************************************************************/
1791
1792/* associate signal watchers to a signal signal */
1793typedef struct
1794{
1795 EV_ATOMIC_T pending;
1796#if EV_MULTIPLICITY
1797 EV_P;
1798#endif
1799 WL head;
1800} ANSIG;
1801
1802static ANSIG signals [EV_NSIG - 1];
1803
1804/*****************************************************************************/
1805
1806#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1807
839static void noinline 1808static void noinline ecb_cold
840evpipe_init (EV_P) 1809evpipe_init (EV_P)
841{ 1810{
842 if (!ev_is_active (&pipeev)) 1811 if (!ev_is_active (&pipe_w))
843 { 1812 {
844#if EV_USE_EVENTFD 1813# if EV_USE_EVENTFD
1814 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1815 if (evfd < 0 && errno == EINVAL)
845 if ((evfd = eventfd (0, 0)) >= 0) 1816 evfd = eventfd (0, 0);
1817
1818 if (evfd >= 0)
846 { 1819 {
847 evpipe [0] = -1; 1820 evpipe [0] = -1;
848 fd_intern (evfd); 1821 fd_intern (evfd); /* doing it twice doesn't hurt */
849 ev_io_set (&pipeev, evfd, EV_READ); 1822 ev_io_set (&pipe_w, evfd, EV_READ);
850 } 1823 }
851 else 1824 else
852#endif 1825# endif
853 { 1826 {
854 while (pipe (evpipe)) 1827 while (pipe (evpipe))
855 syserr ("(libev) error creating signal/async pipe"); 1828 ev_syserr ("(libev) error creating signal/async pipe");
856 1829
857 fd_intern (evpipe [0]); 1830 fd_intern (evpipe [0]);
858 fd_intern (evpipe [1]); 1831 fd_intern (evpipe [1]);
859 ev_io_set (&pipeev, evpipe [0], EV_READ); 1832 ev_io_set (&pipe_w, evpipe [0], EV_READ);
860 } 1833 }
861 1834
862 ev_io_start (EV_A_ &pipeev); 1835 ev_io_start (EV_A_ &pipe_w);
863 ev_unref (EV_A); /* watcher should not keep loop alive */ 1836 ev_unref (EV_A); /* watcher should not keep loop alive */
864 } 1837 }
865} 1838}
866 1839
867void inline_size 1840inline_speed void
868evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1841evpipe_write (EV_P_ EV_ATOMIC_T *flag)
869{ 1842{
870 if (!*flag) 1843 if (expect_true (*flag))
1844 return;
1845
1846 *flag = 1;
1847
1848 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1849
1850 pipe_write_skipped = 1;
1851
1852 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1853
1854 if (pipe_write_wanted)
871 { 1855 {
1856 int old_errno;
1857
1858 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1859
872 int old_errno = errno; /* save errno because write might clobber it */ 1860 old_errno = errno; /* save errno because write will clobber it */
873
874 *flag = 1;
875 1861
876#if EV_USE_EVENTFD 1862#if EV_USE_EVENTFD
877 if (evfd >= 0) 1863 if (evfd >= 0)
878 { 1864 {
879 uint64_t counter = 1; 1865 uint64_t counter = 1;
880 write (evfd, &counter, sizeof (uint64_t)); 1866 write (evfd, &counter, sizeof (uint64_t));
881 } 1867 }
882 else 1868 else
883#endif 1869#endif
1870 {
1871 /* win32 people keep sending patches that change this write() to send() */
1872 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1873 /* so when you think this write should be a send instead, please find out */
1874 /* where your send() is from - it's definitely not the microsoft send, and */
1875 /* tell me. thank you. */
1876 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1877 /* check the ev documentation on how to use this flag */
884 write (evpipe [1], &old_errno, 1); 1878 write (evpipe [1], &(evpipe [1]), 1);
1879 }
885 1880
886 errno = old_errno; 1881 errno = old_errno;
887 } 1882 }
888} 1883}
889 1884
1885/* called whenever the libev signal pipe */
1886/* got some events (signal, async) */
890static void 1887static void
891pipecb (EV_P_ ev_io *iow, int revents) 1888pipecb (EV_P_ ev_io *iow, int revents)
892{ 1889{
1890 int i;
1891
1892 if (revents & EV_READ)
1893 {
893#if EV_USE_EVENTFD 1894#if EV_USE_EVENTFD
894 if (evfd >= 0) 1895 if (evfd >= 0)
895 { 1896 {
896 uint64_t counter = 1; 1897 uint64_t counter;
897 read (evfd, &counter, sizeof (uint64_t)); 1898 read (evfd, &counter, sizeof (uint64_t));
898 } 1899 }
899 else 1900 else
900#endif 1901#endif
901 { 1902 {
902 char dummy; 1903 char dummy;
1904 /* see discussion in evpipe_write when you think this read should be recv in win32 */
903 read (evpipe [0], &dummy, 1); 1905 read (evpipe [0], &dummy, 1);
1906 }
1907 }
1908
1909 pipe_write_skipped = 0;
1910
1911#if EV_SIGNAL_ENABLE
1912 if (sig_pending)
904 } 1913 {
1914 sig_pending = 0;
905 1915
906 if (gotsig && ev_is_default_loop (EV_A)) 1916 for (i = EV_NSIG - 1; i--; )
907 { 1917 if (expect_false (signals [i].pending))
908 int signum;
909 gotsig = 0;
910
911 for (signum = signalmax; signum--; )
912 if (signals [signum].gotsig)
913 ev_feed_signal_event (EV_A_ signum + 1); 1918 ev_feed_signal_event (EV_A_ i + 1);
914 } 1919 }
1920#endif
915 1921
916#if EV_ASYNC_ENABLE 1922#if EV_ASYNC_ENABLE
917 if (gotasync) 1923 if (async_pending)
918 { 1924 {
919 int i; 1925 async_pending = 0;
920 gotasync = 0;
921 1926
922 for (i = asynccnt; i--; ) 1927 for (i = asynccnt; i--; )
923 if (asyncs [i]->sent) 1928 if (asyncs [i]->sent)
924 { 1929 {
925 asyncs [i]->sent = 0; 1930 asyncs [i]->sent = 0;
… …
929#endif 1934#endif
930} 1935}
931 1936
932/*****************************************************************************/ 1937/*****************************************************************************/
933 1938
1939void
1940ev_feed_signal (int signum)
1941{
1942#if EV_MULTIPLICITY
1943 EV_P = signals [signum - 1].loop;
1944
1945 if (!EV_A)
1946 return;
1947#endif
1948
1949 if (!ev_active (&pipe_w))
1950 return;
1951
1952 signals [signum - 1].pending = 1;
1953 evpipe_write (EV_A_ &sig_pending);
1954}
1955
934static void 1956static void
935ev_sighandler (int signum) 1957ev_sighandler (int signum)
936{ 1958{
937#if EV_MULTIPLICITY
938 struct ev_loop *loop = &default_loop_struct;
939#endif
940
941#if _WIN32 1959#ifdef _WIN32
942 signal (signum, ev_sighandler); 1960 signal (signum, ev_sighandler);
943#endif 1961#endif
944 1962
945 signals [signum - 1].gotsig = 1; 1963 ev_feed_signal (signum);
946 evpipe_write (EV_A_ &gotsig);
947} 1964}
948 1965
949void noinline 1966void noinline
950ev_feed_signal_event (EV_P_ int signum) 1967ev_feed_signal_event (EV_P_ int signum)
951{ 1968{
952 WL w; 1969 WL w;
953 1970
1971 if (expect_false (signum <= 0 || signum > EV_NSIG))
1972 return;
1973
1974 --signum;
1975
954#if EV_MULTIPLICITY 1976#if EV_MULTIPLICITY
955 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1977 /* it is permissible to try to feed a signal to the wrong loop */
956#endif 1978 /* or, likely more useful, feeding a signal nobody is waiting for */
957 1979
958 --signum; 1980 if (expect_false (signals [signum].loop != EV_A))
959
960 if (signum < 0 || signum >= signalmax)
961 return; 1981 return;
1982#endif
962 1983
963 signals [signum].gotsig = 0; 1984 signals [signum].pending = 0;
964 1985
965 for (w = signals [signum].head; w; w = w->next) 1986 for (w = signals [signum].head; w; w = w->next)
966 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1987 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
967} 1988}
968 1989
1990#if EV_USE_SIGNALFD
1991static void
1992sigfdcb (EV_P_ ev_io *iow, int revents)
1993{
1994 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1995
1996 for (;;)
1997 {
1998 ssize_t res = read (sigfd, si, sizeof (si));
1999
2000 /* not ISO-C, as res might be -1, but works with SuS */
2001 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2002 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2003
2004 if (res < (ssize_t)sizeof (si))
2005 break;
2006 }
2007}
2008#endif
2009
2010#endif
2011
969/*****************************************************************************/ 2012/*****************************************************************************/
970 2013
2014#if EV_CHILD_ENABLE
971static WL childs [EV_PID_HASHSIZE]; 2015static WL childs [EV_PID_HASHSIZE];
972
973#ifndef _WIN32
974 2016
975static ev_signal childev; 2017static ev_signal childev;
976 2018
977#ifndef WIFCONTINUED 2019#ifndef WIFCONTINUED
978# define WIFCONTINUED(status) 0 2020# define WIFCONTINUED(status) 0
979#endif 2021#endif
980 2022
981void inline_speed 2023/* handle a single child status event */
2024inline_speed void
982child_reap (EV_P_ int chain, int pid, int status) 2025child_reap (EV_P_ int chain, int pid, int status)
983{ 2026{
984 ev_child *w; 2027 ev_child *w;
985 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2028 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
986 2029
987 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2030 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
988 { 2031 {
989 if ((w->pid == pid || !w->pid) 2032 if ((w->pid == pid || !w->pid)
990 && (!traced || (w->flags & 1))) 2033 && (!traced || (w->flags & 1)))
991 { 2034 {
992 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2035 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
999 2042
1000#ifndef WCONTINUED 2043#ifndef WCONTINUED
1001# define WCONTINUED 0 2044# define WCONTINUED 0
1002#endif 2045#endif
1003 2046
2047/* called on sigchld etc., calls waitpid */
1004static void 2048static void
1005childcb (EV_P_ ev_signal *sw, int revents) 2049childcb (EV_P_ ev_signal *sw, int revents)
1006{ 2050{
1007 int pid, status; 2051 int pid, status;
1008 2052
… …
1016 /* make sure we are called again until all children have been reaped */ 2060 /* make sure we are called again until all children have been reaped */
1017 /* we need to do it this way so that the callback gets called before we continue */ 2061 /* we need to do it this way so that the callback gets called before we continue */
1018 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2062 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1019 2063
1020 child_reap (EV_A_ pid, pid, status); 2064 child_reap (EV_A_ pid, pid, status);
1021 if (EV_PID_HASHSIZE > 1) 2065 if ((EV_PID_HASHSIZE) > 1)
1022 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2066 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1023} 2067}
1024 2068
1025#endif 2069#endif
1026 2070
1027/*****************************************************************************/ 2071/*****************************************************************************/
1028 2072
2073#if EV_USE_IOCP
2074# include "ev_iocp.c"
2075#endif
1029#if EV_USE_PORT 2076#if EV_USE_PORT
1030# include "ev_port.c" 2077# include "ev_port.c"
1031#endif 2078#endif
1032#if EV_USE_KQUEUE 2079#if EV_USE_KQUEUE
1033# include "ev_kqueue.c" 2080# include "ev_kqueue.c"
… …
1040#endif 2087#endif
1041#if EV_USE_SELECT 2088#if EV_USE_SELECT
1042# include "ev_select.c" 2089# include "ev_select.c"
1043#endif 2090#endif
1044 2091
1045int 2092int ecb_cold
1046ev_version_major (void) 2093ev_version_major (void)
1047{ 2094{
1048 return EV_VERSION_MAJOR; 2095 return EV_VERSION_MAJOR;
1049} 2096}
1050 2097
1051int 2098int ecb_cold
1052ev_version_minor (void) 2099ev_version_minor (void)
1053{ 2100{
1054 return EV_VERSION_MINOR; 2101 return EV_VERSION_MINOR;
1055} 2102}
1056 2103
1057/* return true if we are running with elevated privileges and should ignore env variables */ 2104/* return true if we are running with elevated privileges and should ignore env variables */
1058int inline_size 2105int inline_size ecb_cold
1059enable_secure (void) 2106enable_secure (void)
1060{ 2107{
1061#ifdef _WIN32 2108#ifdef _WIN32
1062 return 0; 2109 return 0;
1063#else 2110#else
1064 return getuid () != geteuid () 2111 return getuid () != geteuid ()
1065 || getgid () != getegid (); 2112 || getgid () != getegid ();
1066#endif 2113#endif
1067} 2114}
1068 2115
1069unsigned int 2116unsigned int ecb_cold
1070ev_supported_backends (void) 2117ev_supported_backends (void)
1071{ 2118{
1072 unsigned int flags = 0; 2119 unsigned int flags = 0;
1073 2120
1074 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2121 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1078 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2125 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1079 2126
1080 return flags; 2127 return flags;
1081} 2128}
1082 2129
1083unsigned int 2130unsigned int ecb_cold
1084ev_recommended_backends (void) 2131ev_recommended_backends (void)
1085{ 2132{
1086 unsigned int flags = ev_supported_backends (); 2133 unsigned int flags = ev_supported_backends ();
1087 2134
1088#ifndef __NetBSD__ 2135#ifndef __NetBSD__
1089 /* kqueue is borked on everything but netbsd apparently */ 2136 /* kqueue is borked on everything but netbsd apparently */
1090 /* it usually doesn't work correctly on anything but sockets and pipes */ 2137 /* it usually doesn't work correctly on anything but sockets and pipes */
1091 flags &= ~EVBACKEND_KQUEUE; 2138 flags &= ~EVBACKEND_KQUEUE;
1092#endif 2139#endif
1093#ifdef __APPLE__ 2140#ifdef __APPLE__
1094 // flags &= ~EVBACKEND_KQUEUE; for documentation 2141 /* only select works correctly on that "unix-certified" platform */
1095 flags &= ~EVBACKEND_POLL; 2142 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2143 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2144#endif
2145#ifdef __FreeBSD__
2146 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1096#endif 2147#endif
1097 2148
1098 return flags; 2149 return flags;
1099} 2150}
1100 2151
1101unsigned int 2152unsigned int ecb_cold
1102ev_embeddable_backends (void) 2153ev_embeddable_backends (void)
1103{ 2154{
1104 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2155 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1105 2156
1106 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2157 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1107 /* please fix it and tell me how to detect the fix */ 2158 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1108 flags &= ~EVBACKEND_EPOLL; 2159 flags &= ~EVBACKEND_EPOLL;
1109 2160
1110 return flags; 2161 return flags;
1111} 2162}
1112 2163
1113unsigned int 2164unsigned int
1114ev_backend (EV_P) 2165ev_backend (EV_P)
1115{ 2166{
1116 return backend; 2167 return backend;
1117} 2168}
1118 2169
2170#if EV_FEATURE_API
1119unsigned int 2171unsigned int
1120ev_loop_count (EV_P) 2172ev_iteration (EV_P)
1121{ 2173{
1122 return loop_count; 2174 return loop_count;
2175}
2176
2177unsigned int
2178ev_depth (EV_P)
2179{
2180 return loop_depth;
1123} 2181}
1124 2182
1125void 2183void
1126ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2184ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1127{ 2185{
… …
1132ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2190ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1133{ 2191{
1134 timeout_blocktime = interval; 2192 timeout_blocktime = interval;
1135} 2193}
1136 2194
2195void
2196ev_set_userdata (EV_P_ void *data)
2197{
2198 userdata = data;
2199}
2200
2201void *
2202ev_userdata (EV_P)
2203{
2204 return userdata;
2205}
2206
2207void
2208ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2209{
2210 invoke_cb = invoke_pending_cb;
2211}
2212
2213void
2214ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2215{
2216 release_cb = release;
2217 acquire_cb = acquire;
2218}
2219#endif
2220
2221/* initialise a loop structure, must be zero-initialised */
1137static void noinline 2222static void noinline ecb_cold
1138loop_init (EV_P_ unsigned int flags) 2223loop_init (EV_P_ unsigned int flags)
1139{ 2224{
1140 if (!backend) 2225 if (!backend)
1141 { 2226 {
2227 origflags = flags;
2228
2229#if EV_USE_REALTIME
2230 if (!have_realtime)
2231 {
2232 struct timespec ts;
2233
2234 if (!clock_gettime (CLOCK_REALTIME, &ts))
2235 have_realtime = 1;
2236 }
2237#endif
2238
1142#if EV_USE_MONOTONIC 2239#if EV_USE_MONOTONIC
2240 if (!have_monotonic)
1143 { 2241 {
1144 struct timespec ts; 2242 struct timespec ts;
2243
1145 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2244 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1146 have_monotonic = 1; 2245 have_monotonic = 1;
1147 } 2246 }
1148#endif
1149
1150 ev_rt_now = ev_time ();
1151 mn_now = get_clock ();
1152 now_floor = mn_now;
1153 rtmn_diff = ev_rt_now - mn_now;
1154
1155 io_blocktime = 0.;
1156 timeout_blocktime = 0.;
1157 backend = 0;
1158 backend_fd = -1;
1159 gotasync = 0;
1160#if EV_USE_INOTIFY
1161 fs_fd = -2;
1162#endif 2247#endif
1163 2248
1164 /* pid check not overridable via env */ 2249 /* pid check not overridable via env */
1165#ifndef _WIN32 2250#ifndef _WIN32
1166 if (flags & EVFLAG_FORKCHECK) 2251 if (flags & EVFLAG_FORKCHECK)
… …
1170 if (!(flags & EVFLAG_NOENV) 2255 if (!(flags & EVFLAG_NOENV)
1171 && !enable_secure () 2256 && !enable_secure ()
1172 && getenv ("LIBEV_FLAGS")) 2257 && getenv ("LIBEV_FLAGS"))
1173 flags = atoi (getenv ("LIBEV_FLAGS")); 2258 flags = atoi (getenv ("LIBEV_FLAGS"));
1174 2259
1175 if (!(flags & 0x0000ffffUL)) 2260 ev_rt_now = ev_time ();
2261 mn_now = get_clock ();
2262 now_floor = mn_now;
2263 rtmn_diff = ev_rt_now - mn_now;
2264#if EV_FEATURE_API
2265 invoke_cb = ev_invoke_pending;
2266#endif
2267
2268 io_blocktime = 0.;
2269 timeout_blocktime = 0.;
2270 backend = 0;
2271 backend_fd = -1;
2272 sig_pending = 0;
2273#if EV_ASYNC_ENABLE
2274 async_pending = 0;
2275#endif
2276 pipe_write_skipped = 0;
2277 pipe_write_wanted = 0;
2278#if EV_USE_INOTIFY
2279 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2280#endif
2281#if EV_USE_SIGNALFD
2282 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2283#endif
2284
2285 if (!(flags & EVBACKEND_MASK))
1176 flags |= ev_recommended_backends (); 2286 flags |= ev_recommended_backends ();
1177 2287
2288#if EV_USE_IOCP
2289 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2290#endif
1178#if EV_USE_PORT 2291#if EV_USE_PORT
1179 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2292 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1180#endif 2293#endif
1181#if EV_USE_KQUEUE 2294#if EV_USE_KQUEUE
1182 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2295 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1189#endif 2302#endif
1190#if EV_USE_SELECT 2303#if EV_USE_SELECT
1191 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2304 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1192#endif 2305#endif
1193 2306
2307 ev_prepare_init (&pending_w, pendingcb);
2308
2309#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1194 ev_init (&pipeev, pipecb); 2310 ev_init (&pipe_w, pipecb);
1195 ev_set_priority (&pipeev, EV_MAXPRI); 2311 ev_set_priority (&pipe_w, EV_MAXPRI);
2312#endif
1196 } 2313 }
1197} 2314}
1198 2315
1199static void noinline 2316/* free up a loop structure */
2317void ecb_cold
1200loop_destroy (EV_P) 2318ev_loop_destroy (EV_P)
1201{ 2319{
1202 int i; 2320 int i;
1203 2321
2322#if EV_MULTIPLICITY
2323 /* mimic free (0) */
2324 if (!EV_A)
2325 return;
2326#endif
2327
2328#if EV_CLEANUP_ENABLE
2329 /* queue cleanup watchers (and execute them) */
2330 if (expect_false (cleanupcnt))
2331 {
2332 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2333 EV_INVOKE_PENDING;
2334 }
2335#endif
2336
2337#if EV_CHILD_ENABLE
2338 if (ev_is_active (&childev))
2339 {
2340 ev_ref (EV_A); /* child watcher */
2341 ev_signal_stop (EV_A_ &childev);
2342 }
2343#endif
2344
1204 if (ev_is_active (&pipeev)) 2345 if (ev_is_active (&pipe_w))
1205 { 2346 {
1206 ev_ref (EV_A); /* signal watcher */ 2347 /*ev_ref (EV_A);*/
1207 ev_io_stop (EV_A_ &pipeev); 2348 /*ev_io_stop (EV_A_ &pipe_w);*/
1208 2349
1209#if EV_USE_EVENTFD 2350#if EV_USE_EVENTFD
1210 if (evfd >= 0) 2351 if (evfd >= 0)
1211 close (evfd); 2352 close (evfd);
1212#endif 2353#endif
1213 2354
1214 if (evpipe [0] >= 0) 2355 if (evpipe [0] >= 0)
1215 { 2356 {
1216 close (evpipe [0]); 2357 EV_WIN32_CLOSE_FD (evpipe [0]);
1217 close (evpipe [1]); 2358 EV_WIN32_CLOSE_FD (evpipe [1]);
1218 } 2359 }
1219 } 2360 }
2361
2362#if EV_USE_SIGNALFD
2363 if (ev_is_active (&sigfd_w))
2364 close (sigfd);
2365#endif
1220 2366
1221#if EV_USE_INOTIFY 2367#if EV_USE_INOTIFY
1222 if (fs_fd >= 0) 2368 if (fs_fd >= 0)
1223 close (fs_fd); 2369 close (fs_fd);
1224#endif 2370#endif
1225 2371
1226 if (backend_fd >= 0) 2372 if (backend_fd >= 0)
1227 close (backend_fd); 2373 close (backend_fd);
1228 2374
2375#if EV_USE_IOCP
2376 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2377#endif
1229#if EV_USE_PORT 2378#if EV_USE_PORT
1230 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2379 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1231#endif 2380#endif
1232#if EV_USE_KQUEUE 2381#if EV_USE_KQUEUE
1233 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2382 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1248#if EV_IDLE_ENABLE 2397#if EV_IDLE_ENABLE
1249 array_free (idle, [i]); 2398 array_free (idle, [i]);
1250#endif 2399#endif
1251 } 2400 }
1252 2401
1253 ev_free (anfds); anfdmax = 0; 2402 ev_free (anfds); anfds = 0; anfdmax = 0;
1254 2403
1255 /* have to use the microsoft-never-gets-it-right macro */ 2404 /* have to use the microsoft-never-gets-it-right macro */
2405 array_free (rfeed, EMPTY);
1256 array_free (fdchange, EMPTY); 2406 array_free (fdchange, EMPTY);
1257 array_free (timer, EMPTY); 2407 array_free (timer, EMPTY);
1258#if EV_PERIODIC_ENABLE 2408#if EV_PERIODIC_ENABLE
1259 array_free (periodic, EMPTY); 2409 array_free (periodic, EMPTY);
1260#endif 2410#endif
1261#if EV_FORK_ENABLE 2411#if EV_FORK_ENABLE
1262 array_free (fork, EMPTY); 2412 array_free (fork, EMPTY);
1263#endif 2413#endif
2414#if EV_CLEANUP_ENABLE
2415 array_free (cleanup, EMPTY);
2416#endif
1264 array_free (prepare, EMPTY); 2417 array_free (prepare, EMPTY);
1265 array_free (check, EMPTY); 2418 array_free (check, EMPTY);
1266#if EV_ASYNC_ENABLE 2419#if EV_ASYNC_ENABLE
1267 array_free (async, EMPTY); 2420 array_free (async, EMPTY);
1268#endif 2421#endif
1269 2422
1270 backend = 0; 2423 backend = 0;
1271}
1272 2424
2425#if EV_MULTIPLICITY
2426 if (ev_is_default_loop (EV_A))
2427#endif
2428 ev_default_loop_ptr = 0;
2429#if EV_MULTIPLICITY
2430 else
2431 ev_free (EV_A);
2432#endif
2433}
2434
2435#if EV_USE_INOTIFY
1273void inline_size infy_fork (EV_P); 2436inline_size void infy_fork (EV_P);
2437#endif
1274 2438
1275void inline_size 2439inline_size void
1276loop_fork (EV_P) 2440loop_fork (EV_P)
1277{ 2441{
1278#if EV_USE_PORT 2442#if EV_USE_PORT
1279 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2443 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1280#endif 2444#endif
… …
1286#endif 2450#endif
1287#if EV_USE_INOTIFY 2451#if EV_USE_INOTIFY
1288 infy_fork (EV_A); 2452 infy_fork (EV_A);
1289#endif 2453#endif
1290 2454
1291 if (ev_is_active (&pipeev)) 2455 if (ev_is_active (&pipe_w))
1292 { 2456 {
1293 /* this "locks" the handlers against writing to the pipe */ 2457 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1294 /* while we modify the fd vars */
1295 gotsig = 1;
1296#if EV_ASYNC_ENABLE
1297 gotasync = 1;
1298#endif
1299 2458
1300 ev_ref (EV_A); 2459 ev_ref (EV_A);
1301 ev_io_stop (EV_A_ &pipeev); 2460 ev_io_stop (EV_A_ &pipe_w);
1302 2461
1303#if EV_USE_EVENTFD 2462#if EV_USE_EVENTFD
1304 if (evfd >= 0) 2463 if (evfd >= 0)
1305 close (evfd); 2464 close (evfd);
1306#endif 2465#endif
1307 2466
1308 if (evpipe [0] >= 0) 2467 if (evpipe [0] >= 0)
1309 { 2468 {
1310 close (evpipe [0]); 2469 EV_WIN32_CLOSE_FD (evpipe [0]);
1311 close (evpipe [1]); 2470 EV_WIN32_CLOSE_FD (evpipe [1]);
1312 } 2471 }
1313 2472
2473#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1314 evpipe_init (EV_A); 2474 evpipe_init (EV_A);
1315 /* now iterate over everything, in case we missed something */ 2475 /* now iterate over everything, in case we missed something */
1316 pipecb (EV_A_ &pipeev, EV_READ); 2476 pipecb (EV_A_ &pipe_w, EV_READ);
2477#endif
1317 } 2478 }
1318 2479
1319 postfork = 0; 2480 postfork = 0;
1320} 2481}
1321 2482
1322#if EV_MULTIPLICITY 2483#if EV_MULTIPLICITY
2484
1323struct ev_loop * 2485struct ev_loop * ecb_cold
1324ev_loop_new (unsigned int flags) 2486ev_loop_new (unsigned int flags)
1325{ 2487{
1326 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2488 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1327 2489
1328 memset (loop, 0, sizeof (struct ev_loop)); 2490 memset (EV_A, 0, sizeof (struct ev_loop));
1329
1330 loop_init (EV_A_ flags); 2491 loop_init (EV_A_ flags);
1331 2492
1332 if (ev_backend (EV_A)) 2493 if (ev_backend (EV_A))
1333 return loop; 2494 return EV_A;
1334 2495
2496 ev_free (EV_A);
1335 return 0; 2497 return 0;
1336} 2498}
1337 2499
1338void 2500#endif /* multiplicity */
1339ev_loop_destroy (EV_P)
1340{
1341 loop_destroy (EV_A);
1342 ev_free (loop);
1343}
1344 2501
1345void 2502#if EV_VERIFY
1346ev_loop_fork (EV_P) 2503static void noinline ecb_cold
2504verify_watcher (EV_P_ W w)
1347{ 2505{
1348 postfork = 1; /* must be in line with ev_default_fork */ 2506 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1349}
1350 2507
2508 if (w->pending)
2509 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2510}
2511
2512static void noinline ecb_cold
2513verify_heap (EV_P_ ANHE *heap, int N)
2514{
2515 int i;
2516
2517 for (i = HEAP0; i < N + HEAP0; ++i)
2518 {
2519 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2520 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2521 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2522
2523 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2524 }
2525}
2526
2527static void noinline ecb_cold
2528array_verify (EV_P_ W *ws, int cnt)
2529{
2530 while (cnt--)
2531 {
2532 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2533 verify_watcher (EV_A_ ws [cnt]);
2534 }
2535}
2536#endif
2537
2538#if EV_FEATURE_API
2539void ecb_cold
2540ev_verify (EV_P)
2541{
2542#if EV_VERIFY
2543 int i;
2544 WL w;
2545
2546 assert (activecnt >= -1);
2547
2548 assert (fdchangemax >= fdchangecnt);
2549 for (i = 0; i < fdchangecnt; ++i)
2550 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2551
2552 assert (anfdmax >= 0);
2553 for (i = 0; i < anfdmax; ++i)
2554 for (w = anfds [i].head; w; w = w->next)
2555 {
2556 verify_watcher (EV_A_ (W)w);
2557 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2558 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2559 }
2560
2561 assert (timermax >= timercnt);
2562 verify_heap (EV_A_ timers, timercnt);
2563
2564#if EV_PERIODIC_ENABLE
2565 assert (periodicmax >= periodiccnt);
2566 verify_heap (EV_A_ periodics, periodiccnt);
2567#endif
2568
2569 for (i = NUMPRI; i--; )
2570 {
2571 assert (pendingmax [i] >= pendingcnt [i]);
2572#if EV_IDLE_ENABLE
2573 assert (idleall >= 0);
2574 assert (idlemax [i] >= idlecnt [i]);
2575 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2576#endif
2577 }
2578
2579#if EV_FORK_ENABLE
2580 assert (forkmax >= forkcnt);
2581 array_verify (EV_A_ (W *)forks, forkcnt);
2582#endif
2583
2584#if EV_CLEANUP_ENABLE
2585 assert (cleanupmax >= cleanupcnt);
2586 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2587#endif
2588
2589#if EV_ASYNC_ENABLE
2590 assert (asyncmax >= asynccnt);
2591 array_verify (EV_A_ (W *)asyncs, asynccnt);
2592#endif
2593
2594#if EV_PREPARE_ENABLE
2595 assert (preparemax >= preparecnt);
2596 array_verify (EV_A_ (W *)prepares, preparecnt);
2597#endif
2598
2599#if EV_CHECK_ENABLE
2600 assert (checkmax >= checkcnt);
2601 array_verify (EV_A_ (W *)checks, checkcnt);
2602#endif
2603
2604# if 0
2605#if EV_CHILD_ENABLE
2606 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2607 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2608#endif
2609# endif
2610#endif
2611}
1351#endif 2612#endif
1352 2613
1353#if EV_MULTIPLICITY 2614#if EV_MULTIPLICITY
1354struct ev_loop * 2615struct ev_loop * ecb_cold
1355ev_default_loop_init (unsigned int flags)
1356#else 2616#else
1357int 2617int
2618#endif
1358ev_default_loop (unsigned int flags) 2619ev_default_loop (unsigned int flags)
1359#endif
1360{ 2620{
1361 if (!ev_default_loop_ptr) 2621 if (!ev_default_loop_ptr)
1362 { 2622 {
1363#if EV_MULTIPLICITY 2623#if EV_MULTIPLICITY
1364 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2624 EV_P = ev_default_loop_ptr = &default_loop_struct;
1365#else 2625#else
1366 ev_default_loop_ptr = 1; 2626 ev_default_loop_ptr = 1;
1367#endif 2627#endif
1368 2628
1369 loop_init (EV_A_ flags); 2629 loop_init (EV_A_ flags);
1370 2630
1371 if (ev_backend (EV_A)) 2631 if (ev_backend (EV_A))
1372 { 2632 {
1373#ifndef _WIN32 2633#if EV_CHILD_ENABLE
1374 ev_signal_init (&childev, childcb, SIGCHLD); 2634 ev_signal_init (&childev, childcb, SIGCHLD);
1375 ev_set_priority (&childev, EV_MAXPRI); 2635 ev_set_priority (&childev, EV_MAXPRI);
1376 ev_signal_start (EV_A_ &childev); 2636 ev_signal_start (EV_A_ &childev);
1377 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2637 ev_unref (EV_A); /* child watcher should not keep loop alive */
1378#endif 2638#endif
… …
1383 2643
1384 return ev_default_loop_ptr; 2644 return ev_default_loop_ptr;
1385} 2645}
1386 2646
1387void 2647void
1388ev_default_destroy (void) 2648ev_loop_fork (EV_P)
1389{ 2649{
1390#if EV_MULTIPLICITY
1391 struct ev_loop *loop = ev_default_loop_ptr;
1392#endif
1393
1394#ifndef _WIN32
1395 ev_ref (EV_A); /* child watcher */
1396 ev_signal_stop (EV_A_ &childev);
1397#endif
1398
1399 loop_destroy (EV_A);
1400}
1401
1402void
1403ev_default_fork (void)
1404{
1405#if EV_MULTIPLICITY
1406 struct ev_loop *loop = ev_default_loop_ptr;
1407#endif
1408
1409 if (backend)
1410 postfork = 1; /* must be in line with ev_loop_fork */ 2650 postfork = 1; /* must be in line with ev_default_fork */
1411} 2651}
1412 2652
1413/*****************************************************************************/ 2653/*****************************************************************************/
1414 2654
1415void 2655void
1416ev_invoke (EV_P_ void *w, int revents) 2656ev_invoke (EV_P_ void *w, int revents)
1417{ 2657{
1418 EV_CB_INVOKE ((W)w, revents); 2658 EV_CB_INVOKE ((W)w, revents);
1419} 2659}
1420 2660
1421void inline_speed 2661unsigned int
1422call_pending (EV_P) 2662ev_pending_count (EV_P)
2663{
2664 int pri;
2665 unsigned int count = 0;
2666
2667 for (pri = NUMPRI; pri--; )
2668 count += pendingcnt [pri];
2669
2670 return count;
2671}
2672
2673void noinline
2674ev_invoke_pending (EV_P)
1423{ 2675{
1424 int pri; 2676 int pri;
1425 2677
1426 for (pri = NUMPRI; pri--; ) 2678 for (pri = NUMPRI; pri--; )
1427 while (pendingcnt [pri]) 2679 while (pendingcnt [pri])
1428 { 2680 {
1429 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2681 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1430 2682
1431 if (expect_true (p->w))
1432 {
1433 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1434
1435 p->w->pending = 0; 2683 p->w->pending = 0;
1436 EV_CB_INVOKE (p->w, p->events); 2684 EV_CB_INVOKE (p->w, p->events);
1437 } 2685 EV_FREQUENT_CHECK;
1438 } 2686 }
1439} 2687}
1440 2688
1441void inline_size
1442timers_reify (EV_P)
1443{
1444 while (timercnt && ((WT)timers [0])->at <= mn_now)
1445 {
1446 ev_timer *w = (ev_timer *)timers [0];
1447
1448 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1449
1450 /* first reschedule or stop timer */
1451 if (w->repeat)
1452 {
1453 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1454
1455 ((WT)w)->at += w->repeat;
1456 if (((WT)w)->at < mn_now)
1457 ((WT)w)->at = mn_now;
1458
1459 downheap (timers, timercnt, 0);
1460 }
1461 else
1462 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1463
1464 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1465 }
1466}
1467
1468#if EV_PERIODIC_ENABLE
1469void inline_size
1470periodics_reify (EV_P)
1471{
1472 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1473 {
1474 ev_periodic *w = (ev_periodic *)periodics [0];
1475
1476 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1477
1478 /* first reschedule or stop timer */
1479 if (w->reschedule_cb)
1480 {
1481 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1482 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1483 downheap (periodics, periodiccnt, 0);
1484 }
1485 else if (w->interval)
1486 {
1487 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1488 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1489 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1490 downheap (periodics, periodiccnt, 0);
1491 }
1492 else
1493 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1494
1495 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1496 }
1497}
1498
1499static void noinline
1500periodics_reschedule (EV_P)
1501{
1502 int i;
1503
1504 /* adjust periodics after time jump */
1505 for (i = 0; i < periodiccnt; ++i)
1506 {
1507 ev_periodic *w = (ev_periodic *)periodics [i];
1508
1509 if (w->reschedule_cb)
1510 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1511 else if (w->interval)
1512 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1513 }
1514
1515 /* now rebuild the heap */
1516 for (i = periodiccnt >> 1; i--; )
1517 downheap (periodics, periodiccnt, i);
1518}
1519#endif
1520
1521#if EV_IDLE_ENABLE 2689#if EV_IDLE_ENABLE
1522void inline_size 2690/* make idle watchers pending. this handles the "call-idle */
2691/* only when higher priorities are idle" logic */
2692inline_size void
1523idle_reify (EV_P) 2693idle_reify (EV_P)
1524{ 2694{
1525 if (expect_false (idleall)) 2695 if (expect_false (idleall))
1526 { 2696 {
1527 int pri; 2697 int pri;
… …
1539 } 2709 }
1540 } 2710 }
1541} 2711}
1542#endif 2712#endif
1543 2713
1544void inline_speed 2714/* make timers pending */
2715inline_size void
2716timers_reify (EV_P)
2717{
2718 EV_FREQUENT_CHECK;
2719
2720 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2721 {
2722 do
2723 {
2724 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2725
2726 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2727
2728 /* first reschedule or stop timer */
2729 if (w->repeat)
2730 {
2731 ev_at (w) += w->repeat;
2732 if (ev_at (w) < mn_now)
2733 ev_at (w) = mn_now;
2734
2735 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2736
2737 ANHE_at_cache (timers [HEAP0]);
2738 downheap (timers, timercnt, HEAP0);
2739 }
2740 else
2741 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2742
2743 EV_FREQUENT_CHECK;
2744 feed_reverse (EV_A_ (W)w);
2745 }
2746 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2747
2748 feed_reverse_done (EV_A_ EV_TIMER);
2749 }
2750}
2751
2752#if EV_PERIODIC_ENABLE
2753
2754static void noinline
2755periodic_recalc (EV_P_ ev_periodic *w)
2756{
2757 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2758 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2759
2760 /* the above almost always errs on the low side */
2761 while (at <= ev_rt_now)
2762 {
2763 ev_tstamp nat = at + w->interval;
2764
2765 /* when resolution fails us, we use ev_rt_now */
2766 if (expect_false (nat == at))
2767 {
2768 at = ev_rt_now;
2769 break;
2770 }
2771
2772 at = nat;
2773 }
2774
2775 ev_at (w) = at;
2776}
2777
2778/* make periodics pending */
2779inline_size void
2780periodics_reify (EV_P)
2781{
2782 EV_FREQUENT_CHECK;
2783
2784 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2785 {
2786 int feed_count = 0;
2787
2788 do
2789 {
2790 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2791
2792 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2793
2794 /* first reschedule or stop timer */
2795 if (w->reschedule_cb)
2796 {
2797 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2798
2799 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2800
2801 ANHE_at_cache (periodics [HEAP0]);
2802 downheap (periodics, periodiccnt, HEAP0);
2803 }
2804 else if (w->interval)
2805 {
2806 periodic_recalc (EV_A_ w);
2807 ANHE_at_cache (periodics [HEAP0]);
2808 downheap (periodics, periodiccnt, HEAP0);
2809 }
2810 else
2811 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2812
2813 EV_FREQUENT_CHECK;
2814 feed_reverse (EV_A_ (W)w);
2815 }
2816 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2817
2818 feed_reverse_done (EV_A_ EV_PERIODIC);
2819 }
2820}
2821
2822/* simply recalculate all periodics */
2823/* TODO: maybe ensure that at least one event happens when jumping forward? */
2824static void noinline ecb_cold
2825periodics_reschedule (EV_P)
2826{
2827 int i;
2828
2829 /* adjust periodics after time jump */
2830 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2831 {
2832 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2833
2834 if (w->reschedule_cb)
2835 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2836 else if (w->interval)
2837 periodic_recalc (EV_A_ w);
2838
2839 ANHE_at_cache (periodics [i]);
2840 }
2841
2842 reheap (periodics, periodiccnt);
2843}
2844#endif
2845
2846/* adjust all timers by a given offset */
2847static void noinline ecb_cold
2848timers_reschedule (EV_P_ ev_tstamp adjust)
2849{
2850 int i;
2851
2852 for (i = 0; i < timercnt; ++i)
2853 {
2854 ANHE *he = timers + i + HEAP0;
2855 ANHE_w (*he)->at += adjust;
2856 ANHE_at_cache (*he);
2857 }
2858}
2859
2860/* fetch new monotonic and realtime times from the kernel */
2861/* also detect if there was a timejump, and act accordingly */
2862inline_speed void
1545time_update (EV_P_ ev_tstamp max_block) 2863time_update (EV_P_ ev_tstamp max_block)
1546{ 2864{
1547 int i;
1548
1549#if EV_USE_MONOTONIC 2865#if EV_USE_MONOTONIC
1550 if (expect_true (have_monotonic)) 2866 if (expect_true (have_monotonic))
1551 { 2867 {
2868 int i;
1552 ev_tstamp odiff = rtmn_diff; 2869 ev_tstamp odiff = rtmn_diff;
1553 2870
1554 mn_now = get_clock (); 2871 mn_now = get_clock ();
1555 2872
1556 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2873 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1572 * doesn't hurt either as we only do this on time-jumps or 2889 * doesn't hurt either as we only do this on time-jumps or
1573 * in the unlikely event of having been preempted here. 2890 * in the unlikely event of having been preempted here.
1574 */ 2891 */
1575 for (i = 4; --i; ) 2892 for (i = 4; --i; )
1576 { 2893 {
2894 ev_tstamp diff;
1577 rtmn_diff = ev_rt_now - mn_now; 2895 rtmn_diff = ev_rt_now - mn_now;
1578 2896
1579 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2897 diff = odiff - rtmn_diff;
2898
2899 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1580 return; /* all is well */ 2900 return; /* all is well */
1581 2901
1582 ev_rt_now = ev_time (); 2902 ev_rt_now = ev_time ();
1583 mn_now = get_clock (); 2903 mn_now = get_clock ();
1584 now_floor = mn_now; 2904 now_floor = mn_now;
1585 } 2905 }
1586 2906
2907 /* no timer adjustment, as the monotonic clock doesn't jump */
2908 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1587# if EV_PERIODIC_ENABLE 2909# if EV_PERIODIC_ENABLE
1588 periodics_reschedule (EV_A); 2910 periodics_reschedule (EV_A);
1589# endif 2911# endif
1590 /* no timer adjustment, as the monotonic clock doesn't jump */
1591 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1592 } 2912 }
1593 else 2913 else
1594#endif 2914#endif
1595 { 2915 {
1596 ev_rt_now = ev_time (); 2916 ev_rt_now = ev_time ();
1597 2917
1598 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2918 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1599 { 2919 {
2920 /* adjust timers. this is easy, as the offset is the same for all of them */
2921 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1600#if EV_PERIODIC_ENABLE 2922#if EV_PERIODIC_ENABLE
1601 periodics_reschedule (EV_A); 2923 periodics_reschedule (EV_A);
1602#endif 2924#endif
1603 /* adjust timers. this is easy, as the offset is the same for all of them */
1604 for (i = 0; i < timercnt; ++i)
1605 ((WT)timers [i])->at += ev_rt_now - mn_now;
1606 } 2925 }
1607 2926
1608 mn_now = ev_rt_now; 2927 mn_now = ev_rt_now;
1609 } 2928 }
1610} 2929}
1611 2930
1612void 2931void
1613ev_ref (EV_P)
1614{
1615 ++activecnt;
1616}
1617
1618void
1619ev_unref (EV_P)
1620{
1621 --activecnt;
1622}
1623
1624static int loop_done;
1625
1626void
1627ev_loop (EV_P_ int flags) 2932ev_run (EV_P_ int flags)
1628{ 2933{
2934#if EV_FEATURE_API
2935 ++loop_depth;
2936#endif
2937
2938 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2939
1629 loop_done = EVUNLOOP_CANCEL; 2940 loop_done = EVBREAK_CANCEL;
1630 2941
1631 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2942 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1632 2943
1633 do 2944 do
1634 { 2945 {
2946#if EV_VERIFY >= 2
2947 ev_verify (EV_A);
2948#endif
2949
1635#ifndef _WIN32 2950#ifndef _WIN32
1636 if (expect_false (curpid)) /* penalise the forking check even more */ 2951 if (expect_false (curpid)) /* penalise the forking check even more */
1637 if (expect_false (getpid () != curpid)) 2952 if (expect_false (getpid () != curpid))
1638 { 2953 {
1639 curpid = getpid (); 2954 curpid = getpid ();
… …
1645 /* we might have forked, so queue fork handlers */ 2960 /* we might have forked, so queue fork handlers */
1646 if (expect_false (postfork)) 2961 if (expect_false (postfork))
1647 if (forkcnt) 2962 if (forkcnt)
1648 { 2963 {
1649 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2964 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1650 call_pending (EV_A); 2965 EV_INVOKE_PENDING;
1651 } 2966 }
1652#endif 2967#endif
1653 2968
2969#if EV_PREPARE_ENABLE
1654 /* queue prepare watchers (and execute them) */ 2970 /* queue prepare watchers (and execute them) */
1655 if (expect_false (preparecnt)) 2971 if (expect_false (preparecnt))
1656 { 2972 {
1657 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2973 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1658 call_pending (EV_A); 2974 EV_INVOKE_PENDING;
1659 } 2975 }
2976#endif
1660 2977
1661 if (expect_false (!activecnt)) 2978 if (expect_false (loop_done))
1662 break; 2979 break;
1663 2980
1664 /* we might have forked, so reify kernel state if necessary */ 2981 /* we might have forked, so reify kernel state if necessary */
1665 if (expect_false (postfork)) 2982 if (expect_false (postfork))
1666 loop_fork (EV_A); 2983 loop_fork (EV_A);
… …
1671 /* calculate blocking time */ 2988 /* calculate blocking time */
1672 { 2989 {
1673 ev_tstamp waittime = 0.; 2990 ev_tstamp waittime = 0.;
1674 ev_tstamp sleeptime = 0.; 2991 ev_tstamp sleeptime = 0.;
1675 2992
2993 /* remember old timestamp for io_blocktime calculation */
2994 ev_tstamp prev_mn_now = mn_now;
2995
2996 /* update time to cancel out callback processing overhead */
2997 time_update (EV_A_ 1e100);
2998
2999 /* from now on, we want a pipe-wake-up */
3000 pipe_write_wanted = 1;
3001
3002 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3003
1676 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3004 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1677 { 3005 {
1678 /* update time to cancel out callback processing overhead */
1679 time_update (EV_A_ 1e100);
1680
1681 waittime = MAX_BLOCKTIME; 3006 waittime = MAX_BLOCKTIME;
1682 3007
1683 if (timercnt) 3008 if (timercnt)
1684 { 3009 {
1685 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3010 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1686 if (waittime > to) waittime = to; 3011 if (waittime > to) waittime = to;
1687 } 3012 }
1688 3013
1689#if EV_PERIODIC_ENABLE 3014#if EV_PERIODIC_ENABLE
1690 if (periodiccnt) 3015 if (periodiccnt)
1691 { 3016 {
1692 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3017 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1693 if (waittime > to) waittime = to; 3018 if (waittime > to) waittime = to;
1694 } 3019 }
1695#endif 3020#endif
1696 3021
3022 /* don't let timeouts decrease the waittime below timeout_blocktime */
1697 if (expect_false (waittime < timeout_blocktime)) 3023 if (expect_false (waittime < timeout_blocktime))
1698 waittime = timeout_blocktime; 3024 waittime = timeout_blocktime;
1699 3025
1700 sleeptime = waittime - backend_fudge; 3026 /* at this point, we NEED to wait, so we have to ensure */
3027 /* to pass a minimum nonzero value to the backend */
3028 if (expect_false (waittime < backend_mintime))
3029 waittime = backend_mintime;
1701 3030
3031 /* extra check because io_blocktime is commonly 0 */
1702 if (expect_true (sleeptime > io_blocktime)) 3032 if (expect_false (io_blocktime))
1703 sleeptime = io_blocktime;
1704
1705 if (sleeptime)
1706 { 3033 {
3034 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3035
3036 if (sleeptime > waittime - backend_mintime)
3037 sleeptime = waittime - backend_mintime;
3038
3039 if (expect_true (sleeptime > 0.))
3040 {
1707 ev_sleep (sleeptime); 3041 ev_sleep (sleeptime);
1708 waittime -= sleeptime; 3042 waittime -= sleeptime;
3043 }
1709 } 3044 }
1710 } 3045 }
1711 3046
3047#if EV_FEATURE_API
1712 ++loop_count; 3048 ++loop_count;
3049#endif
3050 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1713 backend_poll (EV_A_ waittime); 3051 backend_poll (EV_A_ waittime);
3052 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3053
3054 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3055
3056 if (pipe_write_skipped)
3057 {
3058 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3059 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3060 }
3061
1714 3062
1715 /* update ev_rt_now, do magic */ 3063 /* update ev_rt_now, do magic */
1716 time_update (EV_A_ waittime + sleeptime); 3064 time_update (EV_A_ waittime + sleeptime);
1717 } 3065 }
1718 3066
… …
1725#if EV_IDLE_ENABLE 3073#if EV_IDLE_ENABLE
1726 /* queue idle watchers unless other events are pending */ 3074 /* queue idle watchers unless other events are pending */
1727 idle_reify (EV_A); 3075 idle_reify (EV_A);
1728#endif 3076#endif
1729 3077
3078#if EV_CHECK_ENABLE
1730 /* queue check watchers, to be executed first */ 3079 /* queue check watchers, to be executed first */
1731 if (expect_false (checkcnt)) 3080 if (expect_false (checkcnt))
1732 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3081 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3082#endif
1733 3083
1734 call_pending (EV_A); 3084 EV_INVOKE_PENDING;
1735 } 3085 }
1736 while (expect_true ( 3086 while (expect_true (
1737 activecnt 3087 activecnt
1738 && !loop_done 3088 && !loop_done
1739 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3089 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1740 )); 3090 ));
1741 3091
1742 if (loop_done == EVUNLOOP_ONE) 3092 if (loop_done == EVBREAK_ONE)
1743 loop_done = EVUNLOOP_CANCEL; 3093 loop_done = EVBREAK_CANCEL;
3094
3095#if EV_FEATURE_API
3096 --loop_depth;
3097#endif
1744} 3098}
1745 3099
1746void 3100void
1747ev_unloop (EV_P_ int how) 3101ev_break (EV_P_ int how)
1748{ 3102{
1749 loop_done = how; 3103 loop_done = how;
1750} 3104}
1751 3105
3106void
3107ev_ref (EV_P)
3108{
3109 ++activecnt;
3110}
3111
3112void
3113ev_unref (EV_P)
3114{
3115 --activecnt;
3116}
3117
3118void
3119ev_now_update (EV_P)
3120{
3121 time_update (EV_A_ 1e100);
3122}
3123
3124void
3125ev_suspend (EV_P)
3126{
3127 ev_now_update (EV_A);
3128}
3129
3130void
3131ev_resume (EV_P)
3132{
3133 ev_tstamp mn_prev = mn_now;
3134
3135 ev_now_update (EV_A);
3136 timers_reschedule (EV_A_ mn_now - mn_prev);
3137#if EV_PERIODIC_ENABLE
3138 /* TODO: really do this? */
3139 periodics_reschedule (EV_A);
3140#endif
3141}
3142
1752/*****************************************************************************/ 3143/*****************************************************************************/
3144/* singly-linked list management, used when the expected list length is short */
1753 3145
1754void inline_size 3146inline_size void
1755wlist_add (WL *head, WL elem) 3147wlist_add (WL *head, WL elem)
1756{ 3148{
1757 elem->next = *head; 3149 elem->next = *head;
1758 *head = elem; 3150 *head = elem;
1759} 3151}
1760 3152
1761void inline_size 3153inline_size void
1762wlist_del (WL *head, WL elem) 3154wlist_del (WL *head, WL elem)
1763{ 3155{
1764 while (*head) 3156 while (*head)
1765 { 3157 {
1766 if (*head == elem) 3158 if (expect_true (*head == elem))
1767 { 3159 {
1768 *head = elem->next; 3160 *head = elem->next;
1769 return; 3161 break;
1770 } 3162 }
1771 3163
1772 head = &(*head)->next; 3164 head = &(*head)->next;
1773 } 3165 }
1774} 3166}
1775 3167
1776void inline_speed 3168/* internal, faster, version of ev_clear_pending */
3169inline_speed void
1777clear_pending (EV_P_ W w) 3170clear_pending (EV_P_ W w)
1778{ 3171{
1779 if (w->pending) 3172 if (w->pending)
1780 { 3173 {
1781 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3174 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1782 w->pending = 0; 3175 w->pending = 0;
1783 } 3176 }
1784} 3177}
1785 3178
1786int 3179int
… …
1790 int pending = w_->pending; 3183 int pending = w_->pending;
1791 3184
1792 if (expect_true (pending)) 3185 if (expect_true (pending))
1793 { 3186 {
1794 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3187 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3188 p->w = (W)&pending_w;
1795 w_->pending = 0; 3189 w_->pending = 0;
1796 p->w = 0;
1797 return p->events; 3190 return p->events;
1798 } 3191 }
1799 else 3192 else
1800 return 0; 3193 return 0;
1801} 3194}
1802 3195
1803void inline_size 3196inline_size void
1804pri_adjust (EV_P_ W w) 3197pri_adjust (EV_P_ W w)
1805{ 3198{
1806 int pri = w->priority; 3199 int pri = ev_priority (w);
1807 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3200 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1808 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3201 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1809 w->priority = pri; 3202 ev_set_priority (w, pri);
1810} 3203}
1811 3204
1812void inline_speed 3205inline_speed void
1813ev_start (EV_P_ W w, int active) 3206ev_start (EV_P_ W w, int active)
1814{ 3207{
1815 pri_adjust (EV_A_ w); 3208 pri_adjust (EV_A_ w);
1816 w->active = active; 3209 w->active = active;
1817 ev_ref (EV_A); 3210 ev_ref (EV_A);
1818} 3211}
1819 3212
1820void inline_size 3213inline_size void
1821ev_stop (EV_P_ W w) 3214ev_stop (EV_P_ W w)
1822{ 3215{
1823 ev_unref (EV_A); 3216 ev_unref (EV_A);
1824 w->active = 0; 3217 w->active = 0;
1825} 3218}
… …
1832 int fd = w->fd; 3225 int fd = w->fd;
1833 3226
1834 if (expect_false (ev_is_active (w))) 3227 if (expect_false (ev_is_active (w)))
1835 return; 3228 return;
1836 3229
1837 assert (("ev_io_start called with negative fd", fd >= 0)); 3230 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3231 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3232
3233 EV_FREQUENT_CHECK;
1838 3234
1839 ev_start (EV_A_ (W)w, 1); 3235 ev_start (EV_A_ (W)w, 1);
1840 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3236 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1841 wlist_add (&anfds[fd].head, (WL)w); 3237 wlist_add (&anfds[fd].head, (WL)w);
1842 3238
1843 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3239 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1844 w->events &= ~EV_IOFDSET; 3240 w->events &= ~EV__IOFDSET;
3241
3242 EV_FREQUENT_CHECK;
1845} 3243}
1846 3244
1847void noinline 3245void noinline
1848ev_io_stop (EV_P_ ev_io *w) 3246ev_io_stop (EV_P_ ev_io *w)
1849{ 3247{
1850 clear_pending (EV_A_ (W)w); 3248 clear_pending (EV_A_ (W)w);
1851 if (expect_false (!ev_is_active (w))) 3249 if (expect_false (!ev_is_active (w)))
1852 return; 3250 return;
1853 3251
1854 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3252 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3253
3254 EV_FREQUENT_CHECK;
1855 3255
1856 wlist_del (&anfds[w->fd].head, (WL)w); 3256 wlist_del (&anfds[w->fd].head, (WL)w);
1857 ev_stop (EV_A_ (W)w); 3257 ev_stop (EV_A_ (W)w);
1858 3258
1859 fd_change (EV_A_ w->fd, 1); 3259 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3260
3261 EV_FREQUENT_CHECK;
1860} 3262}
1861 3263
1862void noinline 3264void noinline
1863ev_timer_start (EV_P_ ev_timer *w) 3265ev_timer_start (EV_P_ ev_timer *w)
1864{ 3266{
1865 if (expect_false (ev_is_active (w))) 3267 if (expect_false (ev_is_active (w)))
1866 return; 3268 return;
1867 3269
1868 ((WT)w)->at += mn_now; 3270 ev_at (w) += mn_now;
1869 3271
1870 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3272 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1871 3273
3274 EV_FREQUENT_CHECK;
3275
3276 ++timercnt;
1872 ev_start (EV_A_ (W)w, ++timercnt); 3277 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1873 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3278 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1874 timers [timercnt - 1] = (WT)w; 3279 ANHE_w (timers [ev_active (w)]) = (WT)w;
1875 upheap (timers, timercnt - 1); 3280 ANHE_at_cache (timers [ev_active (w)]);
3281 upheap (timers, ev_active (w));
1876 3282
3283 EV_FREQUENT_CHECK;
3284
1877 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3285 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1878} 3286}
1879 3287
1880void noinline 3288void noinline
1881ev_timer_stop (EV_P_ ev_timer *w) 3289ev_timer_stop (EV_P_ ev_timer *w)
1882{ 3290{
1883 clear_pending (EV_A_ (W)w); 3291 clear_pending (EV_A_ (W)w);
1884 if (expect_false (!ev_is_active (w))) 3292 if (expect_false (!ev_is_active (w)))
1885 return; 3293 return;
1886 3294
1887 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3295 EV_FREQUENT_CHECK;
1888 3296
1889 { 3297 {
1890 int active = ((W)w)->active; 3298 int active = ev_active (w);
1891 3299
3300 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3301
3302 --timercnt;
3303
1892 if (expect_true (--active < --timercnt)) 3304 if (expect_true (active < timercnt + HEAP0))
1893 { 3305 {
1894 timers [active] = timers [timercnt]; 3306 timers [active] = timers [timercnt + HEAP0];
1895 adjustheap (timers, timercnt, active); 3307 adjustheap (timers, timercnt, active);
1896 } 3308 }
1897 } 3309 }
1898 3310
1899 ((WT)w)->at -= mn_now; 3311 ev_at (w) -= mn_now;
1900 3312
1901 ev_stop (EV_A_ (W)w); 3313 ev_stop (EV_A_ (W)w);
3314
3315 EV_FREQUENT_CHECK;
1902} 3316}
1903 3317
1904void noinline 3318void noinline
1905ev_timer_again (EV_P_ ev_timer *w) 3319ev_timer_again (EV_P_ ev_timer *w)
1906{ 3320{
3321 EV_FREQUENT_CHECK;
3322
3323 clear_pending (EV_A_ (W)w);
3324
1907 if (ev_is_active (w)) 3325 if (ev_is_active (w))
1908 { 3326 {
1909 if (w->repeat) 3327 if (w->repeat)
1910 { 3328 {
1911 ((WT)w)->at = mn_now + w->repeat; 3329 ev_at (w) = mn_now + w->repeat;
3330 ANHE_at_cache (timers [ev_active (w)]);
1912 adjustheap (timers, timercnt, ((W)w)->active - 1); 3331 adjustheap (timers, timercnt, ev_active (w));
1913 } 3332 }
1914 else 3333 else
1915 ev_timer_stop (EV_A_ w); 3334 ev_timer_stop (EV_A_ w);
1916 } 3335 }
1917 else if (w->repeat) 3336 else if (w->repeat)
1918 { 3337 {
1919 w->at = w->repeat; 3338 ev_at (w) = w->repeat;
1920 ev_timer_start (EV_A_ w); 3339 ev_timer_start (EV_A_ w);
1921 } 3340 }
3341
3342 EV_FREQUENT_CHECK;
3343}
3344
3345ev_tstamp
3346ev_timer_remaining (EV_P_ ev_timer *w)
3347{
3348 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1922} 3349}
1923 3350
1924#if EV_PERIODIC_ENABLE 3351#if EV_PERIODIC_ENABLE
1925void noinline 3352void noinline
1926ev_periodic_start (EV_P_ ev_periodic *w) 3353ev_periodic_start (EV_P_ ev_periodic *w)
1927{ 3354{
1928 if (expect_false (ev_is_active (w))) 3355 if (expect_false (ev_is_active (w)))
1929 return; 3356 return;
1930 3357
1931 if (w->reschedule_cb) 3358 if (w->reschedule_cb)
1932 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3359 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1933 else if (w->interval) 3360 else if (w->interval)
1934 { 3361 {
1935 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3362 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1936 /* this formula differs from the one in periodic_reify because we do not always round up */ 3363 periodic_recalc (EV_A_ w);
1937 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1938 } 3364 }
1939 else 3365 else
1940 ((WT)w)->at = w->offset; 3366 ev_at (w) = w->offset;
1941 3367
3368 EV_FREQUENT_CHECK;
3369
3370 ++periodiccnt;
1942 ev_start (EV_A_ (W)w, ++periodiccnt); 3371 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1943 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 3372 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1944 periodics [periodiccnt - 1] = (WT)w; 3373 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1945 upheap (periodics, periodiccnt - 1); 3374 ANHE_at_cache (periodics [ev_active (w)]);
3375 upheap (periodics, ev_active (w));
1946 3376
3377 EV_FREQUENT_CHECK;
3378
1947 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3379 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1948} 3380}
1949 3381
1950void noinline 3382void noinline
1951ev_periodic_stop (EV_P_ ev_periodic *w) 3383ev_periodic_stop (EV_P_ ev_periodic *w)
1952{ 3384{
1953 clear_pending (EV_A_ (W)w); 3385 clear_pending (EV_A_ (W)w);
1954 if (expect_false (!ev_is_active (w))) 3386 if (expect_false (!ev_is_active (w)))
1955 return; 3387 return;
1956 3388
1957 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3389 EV_FREQUENT_CHECK;
1958 3390
1959 { 3391 {
1960 int active = ((W)w)->active; 3392 int active = ev_active (w);
1961 3393
3394 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3395
3396 --periodiccnt;
3397
1962 if (expect_true (--active < --periodiccnt)) 3398 if (expect_true (active < periodiccnt + HEAP0))
1963 { 3399 {
1964 periodics [active] = periodics [periodiccnt]; 3400 periodics [active] = periodics [periodiccnt + HEAP0];
1965 adjustheap (periodics, periodiccnt, active); 3401 adjustheap (periodics, periodiccnt, active);
1966 } 3402 }
1967 } 3403 }
1968 3404
1969 ev_stop (EV_A_ (W)w); 3405 ev_stop (EV_A_ (W)w);
3406
3407 EV_FREQUENT_CHECK;
1970} 3408}
1971 3409
1972void noinline 3410void noinline
1973ev_periodic_again (EV_P_ ev_periodic *w) 3411ev_periodic_again (EV_P_ ev_periodic *w)
1974{ 3412{
… …
1980 3418
1981#ifndef SA_RESTART 3419#ifndef SA_RESTART
1982# define SA_RESTART 0 3420# define SA_RESTART 0
1983#endif 3421#endif
1984 3422
3423#if EV_SIGNAL_ENABLE
3424
1985void noinline 3425void noinline
1986ev_signal_start (EV_P_ ev_signal *w) 3426ev_signal_start (EV_P_ ev_signal *w)
1987{ 3427{
1988#if EV_MULTIPLICITY
1989 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1990#endif
1991 if (expect_false (ev_is_active (w))) 3428 if (expect_false (ev_is_active (w)))
1992 return; 3429 return;
1993 3430
1994 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3431 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1995 3432
1996 evpipe_init (EV_A); 3433#if EV_MULTIPLICITY
3434 assert (("libev: a signal must not be attached to two different loops",
3435 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
1997 3436
3437 signals [w->signum - 1].loop = EV_A;
3438#endif
3439
3440 EV_FREQUENT_CHECK;
3441
3442#if EV_USE_SIGNALFD
3443 if (sigfd == -2)
1998 { 3444 {
1999#ifndef _WIN32 3445 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2000 sigset_t full, prev; 3446 if (sigfd < 0 && errno == EINVAL)
2001 sigfillset (&full); 3447 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2002 sigprocmask (SIG_SETMASK, &full, &prev);
2003#endif
2004 3448
2005 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3449 if (sigfd >= 0)
3450 {
3451 fd_intern (sigfd); /* doing it twice will not hurt */
2006 3452
2007#ifndef _WIN32 3453 sigemptyset (&sigfd_set);
2008 sigprocmask (SIG_SETMASK, &prev, 0); 3454
2009#endif 3455 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3456 ev_set_priority (&sigfd_w, EV_MAXPRI);
3457 ev_io_start (EV_A_ &sigfd_w);
3458 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3459 }
2010 } 3460 }
3461
3462 if (sigfd >= 0)
3463 {
3464 /* TODO: check .head */
3465 sigaddset (&sigfd_set, w->signum);
3466 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3467
3468 signalfd (sigfd, &sigfd_set, 0);
3469 }
3470#endif
2011 3471
2012 ev_start (EV_A_ (W)w, 1); 3472 ev_start (EV_A_ (W)w, 1);
2013 wlist_add (&signals [w->signum - 1].head, (WL)w); 3473 wlist_add (&signals [w->signum - 1].head, (WL)w);
2014 3474
2015 if (!((WL)w)->next) 3475 if (!((WL)w)->next)
3476# if EV_USE_SIGNALFD
3477 if (sigfd < 0) /*TODO*/
3478# endif
2016 { 3479 {
2017#if _WIN32 3480# ifdef _WIN32
3481 evpipe_init (EV_A);
3482
2018 signal (w->signum, ev_sighandler); 3483 signal (w->signum, ev_sighandler);
2019#else 3484# else
2020 struct sigaction sa; 3485 struct sigaction sa;
3486
3487 evpipe_init (EV_A);
3488
2021 sa.sa_handler = ev_sighandler; 3489 sa.sa_handler = ev_sighandler;
2022 sigfillset (&sa.sa_mask); 3490 sigfillset (&sa.sa_mask);
2023 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3491 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2024 sigaction (w->signum, &sa, 0); 3492 sigaction (w->signum, &sa, 0);
3493
3494 if (origflags & EVFLAG_NOSIGMASK)
3495 {
3496 sigemptyset (&sa.sa_mask);
3497 sigaddset (&sa.sa_mask, w->signum);
3498 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3499 }
2025#endif 3500#endif
2026 } 3501 }
3502
3503 EV_FREQUENT_CHECK;
2027} 3504}
2028 3505
2029void noinline 3506void noinline
2030ev_signal_stop (EV_P_ ev_signal *w) 3507ev_signal_stop (EV_P_ ev_signal *w)
2031{ 3508{
2032 clear_pending (EV_A_ (W)w); 3509 clear_pending (EV_A_ (W)w);
2033 if (expect_false (!ev_is_active (w))) 3510 if (expect_false (!ev_is_active (w)))
2034 return; 3511 return;
2035 3512
3513 EV_FREQUENT_CHECK;
3514
2036 wlist_del (&signals [w->signum - 1].head, (WL)w); 3515 wlist_del (&signals [w->signum - 1].head, (WL)w);
2037 ev_stop (EV_A_ (W)w); 3516 ev_stop (EV_A_ (W)w);
2038 3517
2039 if (!signals [w->signum - 1].head) 3518 if (!signals [w->signum - 1].head)
3519 {
3520#if EV_MULTIPLICITY
3521 signals [w->signum - 1].loop = 0; /* unattach from signal */
3522#endif
3523#if EV_USE_SIGNALFD
3524 if (sigfd >= 0)
3525 {
3526 sigset_t ss;
3527
3528 sigemptyset (&ss);
3529 sigaddset (&ss, w->signum);
3530 sigdelset (&sigfd_set, w->signum);
3531
3532 signalfd (sigfd, &sigfd_set, 0);
3533 sigprocmask (SIG_UNBLOCK, &ss, 0);
3534 }
3535 else
3536#endif
2040 signal (w->signum, SIG_DFL); 3537 signal (w->signum, SIG_DFL);
3538 }
3539
3540 EV_FREQUENT_CHECK;
2041} 3541}
3542
3543#endif
3544
3545#if EV_CHILD_ENABLE
2042 3546
2043void 3547void
2044ev_child_start (EV_P_ ev_child *w) 3548ev_child_start (EV_P_ ev_child *w)
2045{ 3549{
2046#if EV_MULTIPLICITY 3550#if EV_MULTIPLICITY
2047 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3551 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2048#endif 3552#endif
2049 if (expect_false (ev_is_active (w))) 3553 if (expect_false (ev_is_active (w)))
2050 return; 3554 return;
2051 3555
3556 EV_FREQUENT_CHECK;
3557
2052 ev_start (EV_A_ (W)w, 1); 3558 ev_start (EV_A_ (W)w, 1);
2053 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3559 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3560
3561 EV_FREQUENT_CHECK;
2054} 3562}
2055 3563
2056void 3564void
2057ev_child_stop (EV_P_ ev_child *w) 3565ev_child_stop (EV_P_ ev_child *w)
2058{ 3566{
2059 clear_pending (EV_A_ (W)w); 3567 clear_pending (EV_A_ (W)w);
2060 if (expect_false (!ev_is_active (w))) 3568 if (expect_false (!ev_is_active (w)))
2061 return; 3569 return;
2062 3570
3571 EV_FREQUENT_CHECK;
3572
2063 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3573 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2064 ev_stop (EV_A_ (W)w); 3574 ev_stop (EV_A_ (W)w);
3575
3576 EV_FREQUENT_CHECK;
2065} 3577}
3578
3579#endif
2066 3580
2067#if EV_STAT_ENABLE 3581#if EV_STAT_ENABLE
2068 3582
2069# ifdef _WIN32 3583# ifdef _WIN32
2070# undef lstat 3584# undef lstat
2071# define lstat(a,b) _stati64 (a,b) 3585# define lstat(a,b) _stati64 (a,b)
2072# endif 3586# endif
2073 3587
2074#define DEF_STAT_INTERVAL 5.0074891 3588#define DEF_STAT_INTERVAL 5.0074891
3589#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2075#define MIN_STAT_INTERVAL 0.1074891 3590#define MIN_STAT_INTERVAL 0.1074891
2076 3591
2077static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3592static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2078 3593
2079#if EV_USE_INOTIFY 3594#if EV_USE_INOTIFY
2080# define EV_INOTIFY_BUFSIZE 8192 3595
3596/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3597# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2081 3598
2082static void noinline 3599static void noinline
2083infy_add (EV_P_ ev_stat *w) 3600infy_add (EV_P_ ev_stat *w)
2084{ 3601{
2085 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); 3602 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);
2086 3603
2087 if (w->wd < 0) 3604 if (w->wd >= 0)
3605 {
3606 struct statfs sfs;
3607
3608 /* now local changes will be tracked by inotify, but remote changes won't */
3609 /* unless the filesystem is known to be local, we therefore still poll */
3610 /* also do poll on <2.6.25, but with normal frequency */
3611
3612 if (!fs_2625)
3613 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3614 else if (!statfs (w->path, &sfs)
3615 && (sfs.f_type == 0x1373 /* devfs */
3616 || sfs.f_type == 0xEF53 /* ext2/3 */
3617 || sfs.f_type == 0x3153464a /* jfs */
3618 || sfs.f_type == 0x52654973 /* reiser3 */
3619 || sfs.f_type == 0x01021994 /* tempfs */
3620 || sfs.f_type == 0x58465342 /* xfs */))
3621 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3622 else
3623 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2088 { 3624 }
2089 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3625 else
3626 {
3627 /* can't use inotify, continue to stat */
3628 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2090 3629
2091 /* monitor some parent directory for speedup hints */ 3630 /* if path is not there, monitor some parent directory for speedup hints */
3631 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3632 /* but an efficiency issue only */
2092 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3633 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2093 { 3634 {
2094 char path [4096]; 3635 char path [4096];
2095 strcpy (path, w->path); 3636 strcpy (path, w->path);
2096 3637
… …
2099 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3640 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2100 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3641 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2101 3642
2102 char *pend = strrchr (path, '/'); 3643 char *pend = strrchr (path, '/');
2103 3644
2104 if (!pend) 3645 if (!pend || pend == path)
2105 break; /* whoops, no '/', complain to your admin */ 3646 break;
2106 3647
2107 *pend = 0; 3648 *pend = 0;
2108 w->wd = inotify_add_watch (fs_fd, path, mask); 3649 w->wd = inotify_add_watch (fs_fd, path, mask);
2109 } 3650 }
2110 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3651 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2111 } 3652 }
2112 } 3653 }
2113 else
2114 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2115 3654
2116 if (w->wd >= 0) 3655 if (w->wd >= 0)
2117 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3656 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3657
3658 /* now re-arm timer, if required */
3659 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3660 ev_timer_again (EV_A_ &w->timer);
3661 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2118} 3662}
2119 3663
2120static void noinline 3664static void noinline
2121infy_del (EV_P_ ev_stat *w) 3665infy_del (EV_P_ ev_stat *w)
2122{ 3666{
… …
2125 3669
2126 if (wd < 0) 3670 if (wd < 0)
2127 return; 3671 return;
2128 3672
2129 w->wd = -2; 3673 w->wd = -2;
2130 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3674 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2131 wlist_del (&fs_hash [slot].head, (WL)w); 3675 wlist_del (&fs_hash [slot].head, (WL)w);
2132 3676
2133 /* remove this watcher, if others are watching it, they will rearm */ 3677 /* remove this watcher, if others are watching it, they will rearm */
2134 inotify_rm_watch (fs_fd, wd); 3678 inotify_rm_watch (fs_fd, wd);
2135} 3679}
2136 3680
2137static void noinline 3681static void noinline
2138infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3682infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2139{ 3683{
2140 if (slot < 0) 3684 if (slot < 0)
2141 /* overflow, need to check for all hahs slots */ 3685 /* overflow, need to check for all hash slots */
2142 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3686 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2143 infy_wd (EV_A_ slot, wd, ev); 3687 infy_wd (EV_A_ slot, wd, ev);
2144 else 3688 else
2145 { 3689 {
2146 WL w_; 3690 WL w_;
2147 3691
2148 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3692 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2149 { 3693 {
2150 ev_stat *w = (ev_stat *)w_; 3694 ev_stat *w = (ev_stat *)w_;
2151 w_ = w_->next; /* lets us remove this watcher and all before it */ 3695 w_ = w_->next; /* lets us remove this watcher and all before it */
2152 3696
2153 if (w->wd == wd || wd == -1) 3697 if (w->wd == wd || wd == -1)
2154 { 3698 {
2155 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3699 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2156 { 3700 {
3701 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2157 w->wd = -1; 3702 w->wd = -1;
2158 infy_add (EV_A_ w); /* re-add, no matter what */ 3703 infy_add (EV_A_ w); /* re-add, no matter what */
2159 } 3704 }
2160 3705
2161 stat_timer_cb (EV_A_ &w->timer, 0); 3706 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2166 3711
2167static void 3712static void
2168infy_cb (EV_P_ ev_io *w, int revents) 3713infy_cb (EV_P_ ev_io *w, int revents)
2169{ 3714{
2170 char buf [EV_INOTIFY_BUFSIZE]; 3715 char buf [EV_INOTIFY_BUFSIZE];
2171 struct inotify_event *ev = (struct inotify_event *)buf;
2172 int ofs; 3716 int ofs;
2173 int len = read (fs_fd, buf, sizeof (buf)); 3717 int len = read (fs_fd, buf, sizeof (buf));
2174 3718
2175 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3719 for (ofs = 0; ofs < len; )
3720 {
3721 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2176 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3722 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3723 ofs += sizeof (struct inotify_event) + ev->len;
3724 }
2177} 3725}
2178 3726
2179void inline_size 3727inline_size void ecb_cold
3728ev_check_2625 (EV_P)
3729{
3730 /* kernels < 2.6.25 are borked
3731 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3732 */
3733 if (ev_linux_version () < 0x020619)
3734 return;
3735
3736 fs_2625 = 1;
3737}
3738
3739inline_size int
3740infy_newfd (void)
3741{
3742#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3743 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3744 if (fd >= 0)
3745 return fd;
3746#endif
3747 return inotify_init ();
3748}
3749
3750inline_size void
2180infy_init (EV_P) 3751infy_init (EV_P)
2181{ 3752{
2182 if (fs_fd != -2) 3753 if (fs_fd != -2)
2183 return; 3754 return;
2184 3755
3756 fs_fd = -1;
3757
3758 ev_check_2625 (EV_A);
3759
2185 fs_fd = inotify_init (); 3760 fs_fd = infy_newfd ();
2186 3761
2187 if (fs_fd >= 0) 3762 if (fs_fd >= 0)
2188 { 3763 {
3764 fd_intern (fs_fd);
2189 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3765 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2190 ev_set_priority (&fs_w, EV_MAXPRI); 3766 ev_set_priority (&fs_w, EV_MAXPRI);
2191 ev_io_start (EV_A_ &fs_w); 3767 ev_io_start (EV_A_ &fs_w);
3768 ev_unref (EV_A);
2192 } 3769 }
2193} 3770}
2194 3771
2195void inline_size 3772inline_size void
2196infy_fork (EV_P) 3773infy_fork (EV_P)
2197{ 3774{
2198 int slot; 3775 int slot;
2199 3776
2200 if (fs_fd < 0) 3777 if (fs_fd < 0)
2201 return; 3778 return;
2202 3779
3780 ev_ref (EV_A);
3781 ev_io_stop (EV_A_ &fs_w);
2203 close (fs_fd); 3782 close (fs_fd);
2204 fs_fd = inotify_init (); 3783 fs_fd = infy_newfd ();
2205 3784
3785 if (fs_fd >= 0)
3786 {
3787 fd_intern (fs_fd);
3788 ev_io_set (&fs_w, fs_fd, EV_READ);
3789 ev_io_start (EV_A_ &fs_w);
3790 ev_unref (EV_A);
3791 }
3792
2206 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3793 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2207 { 3794 {
2208 WL w_ = fs_hash [slot].head; 3795 WL w_ = fs_hash [slot].head;
2209 fs_hash [slot].head = 0; 3796 fs_hash [slot].head = 0;
2210 3797
2211 while (w_) 3798 while (w_)
… …
2216 w->wd = -1; 3803 w->wd = -1;
2217 3804
2218 if (fs_fd >= 0) 3805 if (fs_fd >= 0)
2219 infy_add (EV_A_ w); /* re-add, no matter what */ 3806 infy_add (EV_A_ w); /* re-add, no matter what */
2220 else 3807 else
3808 {
3809 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3810 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2221 ev_timer_start (EV_A_ &w->timer); 3811 ev_timer_again (EV_A_ &w->timer);
3812 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3813 }
2222 } 3814 }
2223
2224 } 3815 }
2225} 3816}
2226 3817
3818#endif
3819
3820#ifdef _WIN32
3821# define EV_LSTAT(p,b) _stati64 (p, b)
3822#else
3823# define EV_LSTAT(p,b) lstat (p, b)
2227#endif 3824#endif
2228 3825
2229void 3826void
2230ev_stat_stat (EV_P_ ev_stat *w) 3827ev_stat_stat (EV_P_ ev_stat *w)
2231{ 3828{
… …
2238static void noinline 3835static void noinline
2239stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3836stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2240{ 3837{
2241 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3838 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2242 3839
2243 /* we copy this here each the time so that */ 3840 ev_statdata prev = w->attr;
2244 /* prev has the old value when the callback gets invoked */
2245 w->prev = w->attr;
2246 ev_stat_stat (EV_A_ w); 3841 ev_stat_stat (EV_A_ w);
2247 3842
2248 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3843 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2249 if ( 3844 if (
2250 w->prev.st_dev != w->attr.st_dev 3845 prev.st_dev != w->attr.st_dev
2251 || w->prev.st_ino != w->attr.st_ino 3846 || prev.st_ino != w->attr.st_ino
2252 || w->prev.st_mode != w->attr.st_mode 3847 || prev.st_mode != w->attr.st_mode
2253 || w->prev.st_nlink != w->attr.st_nlink 3848 || prev.st_nlink != w->attr.st_nlink
2254 || w->prev.st_uid != w->attr.st_uid 3849 || prev.st_uid != w->attr.st_uid
2255 || w->prev.st_gid != w->attr.st_gid 3850 || prev.st_gid != w->attr.st_gid
2256 || w->prev.st_rdev != w->attr.st_rdev 3851 || prev.st_rdev != w->attr.st_rdev
2257 || w->prev.st_size != w->attr.st_size 3852 || prev.st_size != w->attr.st_size
2258 || w->prev.st_atime != w->attr.st_atime 3853 || prev.st_atime != w->attr.st_atime
2259 || w->prev.st_mtime != w->attr.st_mtime 3854 || prev.st_mtime != w->attr.st_mtime
2260 || w->prev.st_ctime != w->attr.st_ctime 3855 || prev.st_ctime != w->attr.st_ctime
2261 ) { 3856 ) {
3857 /* we only update w->prev on actual differences */
3858 /* in case we test more often than invoke the callback, */
3859 /* to ensure that prev is always different to attr */
3860 w->prev = prev;
3861
2262 #if EV_USE_INOTIFY 3862 #if EV_USE_INOTIFY
3863 if (fs_fd >= 0)
3864 {
2263 infy_del (EV_A_ w); 3865 infy_del (EV_A_ w);
2264 infy_add (EV_A_ w); 3866 infy_add (EV_A_ w);
2265 ev_stat_stat (EV_A_ w); /* avoid race... */ 3867 ev_stat_stat (EV_A_ w); /* avoid race... */
3868 }
2266 #endif 3869 #endif
2267 3870
2268 ev_feed_event (EV_A_ w, EV_STAT); 3871 ev_feed_event (EV_A_ w, EV_STAT);
2269 } 3872 }
2270} 3873}
… …
2273ev_stat_start (EV_P_ ev_stat *w) 3876ev_stat_start (EV_P_ ev_stat *w)
2274{ 3877{
2275 if (expect_false (ev_is_active (w))) 3878 if (expect_false (ev_is_active (w)))
2276 return; 3879 return;
2277 3880
2278 /* since we use memcmp, we need to clear any padding data etc. */
2279 memset (&w->prev, 0, sizeof (ev_statdata));
2280 memset (&w->attr, 0, sizeof (ev_statdata));
2281
2282 ev_stat_stat (EV_A_ w); 3881 ev_stat_stat (EV_A_ w);
2283 3882
3883 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2284 if (w->interval < MIN_STAT_INTERVAL) 3884 w->interval = MIN_STAT_INTERVAL;
2285 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2286 3885
2287 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3886 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2288 ev_set_priority (&w->timer, ev_priority (w)); 3887 ev_set_priority (&w->timer, ev_priority (w));
2289 3888
2290#if EV_USE_INOTIFY 3889#if EV_USE_INOTIFY
2291 infy_init (EV_A); 3890 infy_init (EV_A);
2292 3891
2293 if (fs_fd >= 0) 3892 if (fs_fd >= 0)
2294 infy_add (EV_A_ w); 3893 infy_add (EV_A_ w);
2295 else 3894 else
2296#endif 3895#endif
3896 {
2297 ev_timer_start (EV_A_ &w->timer); 3897 ev_timer_again (EV_A_ &w->timer);
3898 ev_unref (EV_A);
3899 }
2298 3900
2299 ev_start (EV_A_ (W)w, 1); 3901 ev_start (EV_A_ (W)w, 1);
3902
3903 EV_FREQUENT_CHECK;
2300} 3904}
2301 3905
2302void 3906void
2303ev_stat_stop (EV_P_ ev_stat *w) 3907ev_stat_stop (EV_P_ ev_stat *w)
2304{ 3908{
2305 clear_pending (EV_A_ (W)w); 3909 clear_pending (EV_A_ (W)w);
2306 if (expect_false (!ev_is_active (w))) 3910 if (expect_false (!ev_is_active (w)))
2307 return; 3911 return;
2308 3912
3913 EV_FREQUENT_CHECK;
3914
2309#if EV_USE_INOTIFY 3915#if EV_USE_INOTIFY
2310 infy_del (EV_A_ w); 3916 infy_del (EV_A_ w);
2311#endif 3917#endif
3918
3919 if (ev_is_active (&w->timer))
3920 {
3921 ev_ref (EV_A);
2312 ev_timer_stop (EV_A_ &w->timer); 3922 ev_timer_stop (EV_A_ &w->timer);
3923 }
2313 3924
2314 ev_stop (EV_A_ (W)w); 3925 ev_stop (EV_A_ (W)w);
3926
3927 EV_FREQUENT_CHECK;
2315} 3928}
2316#endif 3929#endif
2317 3930
2318#if EV_IDLE_ENABLE 3931#if EV_IDLE_ENABLE
2319void 3932void
… …
2322 if (expect_false (ev_is_active (w))) 3935 if (expect_false (ev_is_active (w)))
2323 return; 3936 return;
2324 3937
2325 pri_adjust (EV_A_ (W)w); 3938 pri_adjust (EV_A_ (W)w);
2326 3939
3940 EV_FREQUENT_CHECK;
3941
2327 { 3942 {
2328 int active = ++idlecnt [ABSPRI (w)]; 3943 int active = ++idlecnt [ABSPRI (w)];
2329 3944
2330 ++idleall; 3945 ++idleall;
2331 ev_start (EV_A_ (W)w, active); 3946 ev_start (EV_A_ (W)w, active);
2332 3947
2333 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3948 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2334 idles [ABSPRI (w)][active - 1] = w; 3949 idles [ABSPRI (w)][active - 1] = w;
2335 } 3950 }
3951
3952 EV_FREQUENT_CHECK;
2336} 3953}
2337 3954
2338void 3955void
2339ev_idle_stop (EV_P_ ev_idle *w) 3956ev_idle_stop (EV_P_ ev_idle *w)
2340{ 3957{
2341 clear_pending (EV_A_ (W)w); 3958 clear_pending (EV_A_ (W)w);
2342 if (expect_false (!ev_is_active (w))) 3959 if (expect_false (!ev_is_active (w)))
2343 return; 3960 return;
2344 3961
3962 EV_FREQUENT_CHECK;
3963
2345 { 3964 {
2346 int active = ((W)w)->active; 3965 int active = ev_active (w);
2347 3966
2348 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3967 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2349 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3968 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2350 3969
2351 ev_stop (EV_A_ (W)w); 3970 ev_stop (EV_A_ (W)w);
2352 --idleall; 3971 --idleall;
2353 } 3972 }
2354}
2355#endif
2356 3973
3974 EV_FREQUENT_CHECK;
3975}
3976#endif
3977
3978#if EV_PREPARE_ENABLE
2357void 3979void
2358ev_prepare_start (EV_P_ ev_prepare *w) 3980ev_prepare_start (EV_P_ ev_prepare *w)
2359{ 3981{
2360 if (expect_false (ev_is_active (w))) 3982 if (expect_false (ev_is_active (w)))
2361 return; 3983 return;
3984
3985 EV_FREQUENT_CHECK;
2362 3986
2363 ev_start (EV_A_ (W)w, ++preparecnt); 3987 ev_start (EV_A_ (W)w, ++preparecnt);
2364 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3988 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2365 prepares [preparecnt - 1] = w; 3989 prepares [preparecnt - 1] = w;
3990
3991 EV_FREQUENT_CHECK;
2366} 3992}
2367 3993
2368void 3994void
2369ev_prepare_stop (EV_P_ ev_prepare *w) 3995ev_prepare_stop (EV_P_ ev_prepare *w)
2370{ 3996{
2371 clear_pending (EV_A_ (W)w); 3997 clear_pending (EV_A_ (W)w);
2372 if (expect_false (!ev_is_active (w))) 3998 if (expect_false (!ev_is_active (w)))
2373 return; 3999 return;
2374 4000
4001 EV_FREQUENT_CHECK;
4002
2375 { 4003 {
2376 int active = ((W)w)->active; 4004 int active = ev_active (w);
4005
2377 prepares [active - 1] = prepares [--preparecnt]; 4006 prepares [active - 1] = prepares [--preparecnt];
2378 ((W)prepares [active - 1])->active = active; 4007 ev_active (prepares [active - 1]) = active;
2379 } 4008 }
2380 4009
2381 ev_stop (EV_A_ (W)w); 4010 ev_stop (EV_A_ (W)w);
2382}
2383 4011
4012 EV_FREQUENT_CHECK;
4013}
4014#endif
4015
4016#if EV_CHECK_ENABLE
2384void 4017void
2385ev_check_start (EV_P_ ev_check *w) 4018ev_check_start (EV_P_ ev_check *w)
2386{ 4019{
2387 if (expect_false (ev_is_active (w))) 4020 if (expect_false (ev_is_active (w)))
2388 return; 4021 return;
4022
4023 EV_FREQUENT_CHECK;
2389 4024
2390 ev_start (EV_A_ (W)w, ++checkcnt); 4025 ev_start (EV_A_ (W)w, ++checkcnt);
2391 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4026 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2392 checks [checkcnt - 1] = w; 4027 checks [checkcnt - 1] = w;
4028
4029 EV_FREQUENT_CHECK;
2393} 4030}
2394 4031
2395void 4032void
2396ev_check_stop (EV_P_ ev_check *w) 4033ev_check_stop (EV_P_ ev_check *w)
2397{ 4034{
2398 clear_pending (EV_A_ (W)w); 4035 clear_pending (EV_A_ (W)w);
2399 if (expect_false (!ev_is_active (w))) 4036 if (expect_false (!ev_is_active (w)))
2400 return; 4037 return;
2401 4038
4039 EV_FREQUENT_CHECK;
4040
2402 { 4041 {
2403 int active = ((W)w)->active; 4042 int active = ev_active (w);
4043
2404 checks [active - 1] = checks [--checkcnt]; 4044 checks [active - 1] = checks [--checkcnt];
2405 ((W)checks [active - 1])->active = active; 4045 ev_active (checks [active - 1]) = active;
2406 } 4046 }
2407 4047
2408 ev_stop (EV_A_ (W)w); 4048 ev_stop (EV_A_ (W)w);
4049
4050 EV_FREQUENT_CHECK;
2409} 4051}
4052#endif
2410 4053
2411#if EV_EMBED_ENABLE 4054#if EV_EMBED_ENABLE
2412void noinline 4055void noinline
2413ev_embed_sweep (EV_P_ ev_embed *w) 4056ev_embed_sweep (EV_P_ ev_embed *w)
2414{ 4057{
2415 ev_loop (w->other, EVLOOP_NONBLOCK); 4058 ev_run (w->other, EVRUN_NOWAIT);
2416} 4059}
2417 4060
2418static void 4061static void
2419embed_io_cb (EV_P_ ev_io *io, int revents) 4062embed_io_cb (EV_P_ ev_io *io, int revents)
2420{ 4063{
2421 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4064 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2422 4065
2423 if (ev_cb (w)) 4066 if (ev_cb (w))
2424 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4067 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2425 else 4068 else
2426 ev_loop (w->other, EVLOOP_NONBLOCK); 4069 ev_run (w->other, EVRUN_NOWAIT);
2427} 4070}
2428 4071
2429static void 4072static void
2430embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4073embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2431{ 4074{
2432 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4075 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2433 4076
2434 { 4077 {
2435 struct ev_loop *loop = w->other; 4078 EV_P = w->other;
2436 4079
2437 while (fdchangecnt) 4080 while (fdchangecnt)
2438 { 4081 {
2439 fd_reify (EV_A); 4082 fd_reify (EV_A);
2440 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4083 ev_run (EV_A_ EVRUN_NOWAIT);
2441 } 4084 }
2442 } 4085 }
4086}
4087
4088static void
4089embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4090{
4091 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4092
4093 ev_embed_stop (EV_A_ w);
4094
4095 {
4096 EV_P = w->other;
4097
4098 ev_loop_fork (EV_A);
4099 ev_run (EV_A_ EVRUN_NOWAIT);
4100 }
4101
4102 ev_embed_start (EV_A_ w);
2443} 4103}
2444 4104
2445#if 0 4105#if 0
2446static void 4106static void
2447embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4107embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2455{ 4115{
2456 if (expect_false (ev_is_active (w))) 4116 if (expect_false (ev_is_active (w)))
2457 return; 4117 return;
2458 4118
2459 { 4119 {
2460 struct ev_loop *loop = w->other; 4120 EV_P = w->other;
2461 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4121 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2462 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4122 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2463 } 4123 }
4124
4125 EV_FREQUENT_CHECK;
2464 4126
2465 ev_set_priority (&w->io, ev_priority (w)); 4127 ev_set_priority (&w->io, ev_priority (w));
2466 ev_io_start (EV_A_ &w->io); 4128 ev_io_start (EV_A_ &w->io);
2467 4129
2468 ev_prepare_init (&w->prepare, embed_prepare_cb); 4130 ev_prepare_init (&w->prepare, embed_prepare_cb);
2469 ev_set_priority (&w->prepare, EV_MINPRI); 4131 ev_set_priority (&w->prepare, EV_MINPRI);
2470 ev_prepare_start (EV_A_ &w->prepare); 4132 ev_prepare_start (EV_A_ &w->prepare);
2471 4133
4134 ev_fork_init (&w->fork, embed_fork_cb);
4135 ev_fork_start (EV_A_ &w->fork);
4136
2472 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4137 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2473 4138
2474 ev_start (EV_A_ (W)w, 1); 4139 ev_start (EV_A_ (W)w, 1);
4140
4141 EV_FREQUENT_CHECK;
2475} 4142}
2476 4143
2477void 4144void
2478ev_embed_stop (EV_P_ ev_embed *w) 4145ev_embed_stop (EV_P_ ev_embed *w)
2479{ 4146{
2480 clear_pending (EV_A_ (W)w); 4147 clear_pending (EV_A_ (W)w);
2481 if (expect_false (!ev_is_active (w))) 4148 if (expect_false (!ev_is_active (w)))
2482 return; 4149 return;
2483 4150
4151 EV_FREQUENT_CHECK;
4152
2484 ev_io_stop (EV_A_ &w->io); 4153 ev_io_stop (EV_A_ &w->io);
2485 ev_prepare_stop (EV_A_ &w->prepare); 4154 ev_prepare_stop (EV_A_ &w->prepare);
4155 ev_fork_stop (EV_A_ &w->fork);
2486 4156
2487 ev_stop (EV_A_ (W)w); 4157 ev_stop (EV_A_ (W)w);
4158
4159 EV_FREQUENT_CHECK;
2488} 4160}
2489#endif 4161#endif
2490 4162
2491#if EV_FORK_ENABLE 4163#if EV_FORK_ENABLE
2492void 4164void
2493ev_fork_start (EV_P_ ev_fork *w) 4165ev_fork_start (EV_P_ ev_fork *w)
2494{ 4166{
2495 if (expect_false (ev_is_active (w))) 4167 if (expect_false (ev_is_active (w)))
2496 return; 4168 return;
2497 4169
4170 EV_FREQUENT_CHECK;
4171
2498 ev_start (EV_A_ (W)w, ++forkcnt); 4172 ev_start (EV_A_ (W)w, ++forkcnt);
2499 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4173 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2500 forks [forkcnt - 1] = w; 4174 forks [forkcnt - 1] = w;
4175
4176 EV_FREQUENT_CHECK;
2501} 4177}
2502 4178
2503void 4179void
2504ev_fork_stop (EV_P_ ev_fork *w) 4180ev_fork_stop (EV_P_ ev_fork *w)
2505{ 4181{
2506 clear_pending (EV_A_ (W)w); 4182 clear_pending (EV_A_ (W)w);
2507 if (expect_false (!ev_is_active (w))) 4183 if (expect_false (!ev_is_active (w)))
2508 return; 4184 return;
2509 4185
4186 EV_FREQUENT_CHECK;
4187
2510 { 4188 {
2511 int active = ((W)w)->active; 4189 int active = ev_active (w);
4190
2512 forks [active - 1] = forks [--forkcnt]; 4191 forks [active - 1] = forks [--forkcnt];
2513 ((W)forks [active - 1])->active = active; 4192 ev_active (forks [active - 1]) = active;
2514 } 4193 }
2515 4194
2516 ev_stop (EV_A_ (W)w); 4195 ev_stop (EV_A_ (W)w);
4196
4197 EV_FREQUENT_CHECK;
4198}
4199#endif
4200
4201#if EV_CLEANUP_ENABLE
4202void
4203ev_cleanup_start (EV_P_ ev_cleanup *w)
4204{
4205 if (expect_false (ev_is_active (w)))
4206 return;
4207
4208 EV_FREQUENT_CHECK;
4209
4210 ev_start (EV_A_ (W)w, ++cleanupcnt);
4211 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4212 cleanups [cleanupcnt - 1] = w;
4213
4214 /* cleanup watchers should never keep a refcount on the loop */
4215 ev_unref (EV_A);
4216 EV_FREQUENT_CHECK;
4217}
4218
4219void
4220ev_cleanup_stop (EV_P_ ev_cleanup *w)
4221{
4222 clear_pending (EV_A_ (W)w);
4223 if (expect_false (!ev_is_active (w)))
4224 return;
4225
4226 EV_FREQUENT_CHECK;
4227 ev_ref (EV_A);
4228
4229 {
4230 int active = ev_active (w);
4231
4232 cleanups [active - 1] = cleanups [--cleanupcnt];
4233 ev_active (cleanups [active - 1]) = active;
4234 }
4235
4236 ev_stop (EV_A_ (W)w);
4237
4238 EV_FREQUENT_CHECK;
2517} 4239}
2518#endif 4240#endif
2519 4241
2520#if EV_ASYNC_ENABLE 4242#if EV_ASYNC_ENABLE
2521void 4243void
2522ev_async_start (EV_P_ ev_async *w) 4244ev_async_start (EV_P_ ev_async *w)
2523{ 4245{
2524 if (expect_false (ev_is_active (w))) 4246 if (expect_false (ev_is_active (w)))
2525 return; 4247 return;
2526 4248
4249 w->sent = 0;
4250
2527 evpipe_init (EV_A); 4251 evpipe_init (EV_A);
4252
4253 EV_FREQUENT_CHECK;
2528 4254
2529 ev_start (EV_A_ (W)w, ++asynccnt); 4255 ev_start (EV_A_ (W)w, ++asynccnt);
2530 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4256 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2531 asyncs [asynccnt - 1] = w; 4257 asyncs [asynccnt - 1] = w;
4258
4259 EV_FREQUENT_CHECK;
2532} 4260}
2533 4261
2534void 4262void
2535ev_async_stop (EV_P_ ev_async *w) 4263ev_async_stop (EV_P_ ev_async *w)
2536{ 4264{
2537 clear_pending (EV_A_ (W)w); 4265 clear_pending (EV_A_ (W)w);
2538 if (expect_false (!ev_is_active (w))) 4266 if (expect_false (!ev_is_active (w)))
2539 return; 4267 return;
2540 4268
4269 EV_FREQUENT_CHECK;
4270
2541 { 4271 {
2542 int active = ((W)w)->active; 4272 int active = ev_active (w);
4273
2543 asyncs [active - 1] = asyncs [--asynccnt]; 4274 asyncs [active - 1] = asyncs [--asynccnt];
2544 ((W)asyncs [active - 1])->active = active; 4275 ev_active (asyncs [active - 1]) = active;
2545 } 4276 }
2546 4277
2547 ev_stop (EV_A_ (W)w); 4278 ev_stop (EV_A_ (W)w);
4279
4280 EV_FREQUENT_CHECK;
2548} 4281}
2549 4282
2550void 4283void
2551ev_async_send (EV_P_ ev_async *w) 4284ev_async_send (EV_P_ ev_async *w)
2552{ 4285{
2553 w->sent = 1; 4286 w->sent = 1;
2554 evpipe_write (EV_A_ &gotasync); 4287 evpipe_write (EV_A_ &async_pending);
2555} 4288}
2556#endif 4289#endif
2557 4290
2558/*****************************************************************************/ 4291/*****************************************************************************/
2559 4292
… …
2569once_cb (EV_P_ struct ev_once *once, int revents) 4302once_cb (EV_P_ struct ev_once *once, int revents)
2570{ 4303{
2571 void (*cb)(int revents, void *arg) = once->cb; 4304 void (*cb)(int revents, void *arg) = once->cb;
2572 void *arg = once->arg; 4305 void *arg = once->arg;
2573 4306
2574 ev_io_stop (EV_A_ &once->io); 4307 ev_io_stop (EV_A_ &once->io);
2575 ev_timer_stop (EV_A_ &once->to); 4308 ev_timer_stop (EV_A_ &once->to);
2576 ev_free (once); 4309 ev_free (once);
2577 4310
2578 cb (revents, arg); 4311 cb (revents, arg);
2579} 4312}
2580 4313
2581static void 4314static void
2582once_cb_io (EV_P_ ev_io *w, int revents) 4315once_cb_io (EV_P_ ev_io *w, int revents)
2583{ 4316{
2584 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4317 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4318
4319 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2585} 4320}
2586 4321
2587static void 4322static void
2588once_cb_to (EV_P_ ev_timer *w, int revents) 4323once_cb_to (EV_P_ ev_timer *w, int revents)
2589{ 4324{
2590 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4325 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4326
4327 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2591} 4328}
2592 4329
2593void 4330void
2594ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4331ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2595{ 4332{
2596 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4333 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2597 4334
2598 if (expect_false (!once)) 4335 if (expect_false (!once))
2599 { 4336 {
2600 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4337 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2601 return; 4338 return;
2602 } 4339 }
2603 4340
2604 once->cb = cb; 4341 once->cb = cb;
2605 once->arg = arg; 4342 once->arg = arg;
… …
2617 ev_timer_set (&once->to, timeout, 0.); 4354 ev_timer_set (&once->to, timeout, 0.);
2618 ev_timer_start (EV_A_ &once->to); 4355 ev_timer_start (EV_A_ &once->to);
2619 } 4356 }
2620} 4357}
2621 4358
4359/*****************************************************************************/
4360
4361#if EV_WALK_ENABLE
4362void ecb_cold
4363ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4364{
4365 int i, j;
4366 ev_watcher_list *wl, *wn;
4367
4368 if (types & (EV_IO | EV_EMBED))
4369 for (i = 0; i < anfdmax; ++i)
4370 for (wl = anfds [i].head; wl; )
4371 {
4372 wn = wl->next;
4373
4374#if EV_EMBED_ENABLE
4375 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4376 {
4377 if (types & EV_EMBED)
4378 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4379 }
4380 else
4381#endif
4382#if EV_USE_INOTIFY
4383 if (ev_cb ((ev_io *)wl) == infy_cb)
4384 ;
4385 else
4386#endif
4387 if ((ev_io *)wl != &pipe_w)
4388 if (types & EV_IO)
4389 cb (EV_A_ EV_IO, wl);
4390
4391 wl = wn;
4392 }
4393
4394 if (types & (EV_TIMER | EV_STAT))
4395 for (i = timercnt + HEAP0; i-- > HEAP0; )
4396#if EV_STAT_ENABLE
4397 /*TODO: timer is not always active*/
4398 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4399 {
4400 if (types & EV_STAT)
4401 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4402 }
4403 else
4404#endif
4405 if (types & EV_TIMER)
4406 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4407
4408#if EV_PERIODIC_ENABLE
4409 if (types & EV_PERIODIC)
4410 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4411 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4412#endif
4413
4414#if EV_IDLE_ENABLE
4415 if (types & EV_IDLE)
4416 for (j = NUMPRI; j--; )
4417 for (i = idlecnt [j]; i--; )
4418 cb (EV_A_ EV_IDLE, idles [j][i]);
4419#endif
4420
4421#if EV_FORK_ENABLE
4422 if (types & EV_FORK)
4423 for (i = forkcnt; i--; )
4424 if (ev_cb (forks [i]) != embed_fork_cb)
4425 cb (EV_A_ EV_FORK, forks [i]);
4426#endif
4427
4428#if EV_ASYNC_ENABLE
4429 if (types & EV_ASYNC)
4430 for (i = asynccnt; i--; )
4431 cb (EV_A_ EV_ASYNC, asyncs [i]);
4432#endif
4433
4434#if EV_PREPARE_ENABLE
4435 if (types & EV_PREPARE)
4436 for (i = preparecnt; i--; )
4437# if EV_EMBED_ENABLE
4438 if (ev_cb (prepares [i]) != embed_prepare_cb)
4439# endif
4440 cb (EV_A_ EV_PREPARE, prepares [i]);
4441#endif
4442
4443#if EV_CHECK_ENABLE
4444 if (types & EV_CHECK)
4445 for (i = checkcnt; i--; )
4446 cb (EV_A_ EV_CHECK, checks [i]);
4447#endif
4448
4449#if EV_SIGNAL_ENABLE
4450 if (types & EV_SIGNAL)
4451 for (i = 0; i < EV_NSIG - 1; ++i)
4452 for (wl = signals [i].head; wl; )
4453 {
4454 wn = wl->next;
4455 cb (EV_A_ EV_SIGNAL, wl);
4456 wl = wn;
4457 }
4458#endif
4459
4460#if EV_CHILD_ENABLE
4461 if (types & EV_CHILD)
4462 for (i = (EV_PID_HASHSIZE); i--; )
4463 for (wl = childs [i]; wl; )
4464 {
4465 wn = wl->next;
4466 cb (EV_A_ EV_CHILD, wl);
4467 wl = wn;
4468 }
4469#endif
4470/* EV_STAT 0x00001000 /* stat data changed */
4471/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4472}
4473#endif
4474
2622#if EV_MULTIPLICITY 4475#if EV_MULTIPLICITY
2623 #include "ev_wrap.h" 4476 #include "ev_wrap.h"
2624#endif 4477#endif
2625 4478
2626#ifdef __cplusplus
2627}
2628#endif
2629

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