ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.191 by root, Fri Dec 21 02:40:01 2007 UTC vs.
Revision 1.426 by root, Sun May 6 13:42:10 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
30 */ 38 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 43# include EV_CONFIG_H
39# else 44# else
40# include "config.h" 45# include "config.h"
41# endif 46# endif
42 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
43# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
46# endif 71# endif
47# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
49# endif 74# endif
50# else 75# else
51# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
53# endif 78# endif
54# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
56# endif 81# endif
57# endif 82# endif
58 83
84# if HAVE_NANOSLEEP
59# ifndef EV_USE_SELECT 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif 87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
65# endif 91# endif
66 92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
67# ifndef EV_USE_POLL 94# ifndef EV_USE_SELECT
68# if HAVE_POLL && HAVE_POLL_H 95# define EV_USE_SELECT EV_FEATURE_BACKENDS
69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
73# endif 109# endif
74 110
75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
78# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
79# define EV_USE_EPOLL 0
80# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
81# endif 118# endif
82 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
83# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
89# endif 127# endif
90 128
91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
93# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
94# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
95# define EV_USE_PORT 0
96# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
97# endif 136# endif
98 137
99# ifndef EV_USE_INOTIFY
100# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
101# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
102# else
103# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
104# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
105# endif 145# endif
106 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
107#endif 154# endif
108 155
109#include <math.h> 156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
110#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
111#include <fcntl.h> 169#include <fcntl.h>
112#include <stddef.h> 170#include <stddef.h>
113 171
114#include <stdio.h> 172#include <stdio.h>
115 173
116#include <assert.h> 174#include <assert.h>
117#include <errno.h> 175#include <errno.h>
118#include <sys/types.h> 176#include <sys/types.h>
119#include <time.h> 177#include <time.h>
178#include <limits.h>
120 179
121#include <signal.h> 180#include <signal.h>
122 181
123#ifdef EV_H 182#ifdef EV_H
124# include EV_H 183# include EV_H
125#else 184#else
126# include "ev.h" 185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
127#endif 197#endif
128 198
129#ifndef _WIN32 199#ifndef _WIN32
130# include <sys/time.h> 200# include <sys/time.h>
131# include <sys/wait.h> 201# include <sys/wait.h>
132# include <unistd.h> 202# include <unistd.h>
133#else 203#else
204# include <io.h>
134# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 206# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 207# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 208# define EV_SELECT_IS_WINSOCKET 1
138# endif 209# endif
210# undef EV_AVOID_STDIO
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
220
221/* this block tries to deduce configuration from header-defined symbols and defaults */
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
139#endif 260# endif
140 261#endif
141/**/
142 262
143#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
144# define EV_USE_MONOTONIC 0 267# define EV_USE_MONOTONIC 0
268# endif
145#endif 269#endif
146 270
147#ifndef EV_USE_REALTIME 271#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 272# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
273#endif
274
275#ifndef EV_USE_NANOSLEEP
276# if _POSIX_C_SOURCE >= 199309L
277# define EV_USE_NANOSLEEP EV_FEATURE_OS
278# else
279# define EV_USE_NANOSLEEP 0
280# endif
149#endif 281#endif
150 282
151#ifndef EV_USE_SELECT 283#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 284# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 285#endif
154 286
155#ifndef EV_USE_POLL 287#ifndef EV_USE_POLL
156# ifdef _WIN32 288# ifdef _WIN32
157# define EV_USE_POLL 0 289# define EV_USE_POLL 0
158# else 290# else
159# define EV_USE_POLL 1 291# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 292# endif
161#endif 293#endif
162 294
163#ifndef EV_USE_EPOLL 295#ifndef EV_USE_EPOLL
296# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
297# define EV_USE_EPOLL EV_FEATURE_BACKENDS
298# else
164# define EV_USE_EPOLL 0 299# define EV_USE_EPOLL 0
300# endif
165#endif 301#endif
166 302
167#ifndef EV_USE_KQUEUE 303#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 304# define EV_USE_KQUEUE 0
169#endif 305#endif
… …
171#ifndef EV_USE_PORT 307#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 308# define EV_USE_PORT 0
173#endif 309#endif
174 310
175#ifndef EV_USE_INOTIFY 311#ifndef EV_USE_INOTIFY
312# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
313# define EV_USE_INOTIFY EV_FEATURE_OS
314# else
176# define EV_USE_INOTIFY 0 315# define EV_USE_INOTIFY 0
316# endif
177#endif 317#endif
178 318
179#ifndef EV_PID_HASHSIZE 319#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 320# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 321#endif
322
323#ifndef EV_INOTIFY_HASHSIZE
324# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
325#endif
326
327#ifndef EV_USE_EVENTFD
328# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
329# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 330# else
183# define EV_PID_HASHSIZE 16 331# define EV_USE_EVENTFD 0
184# endif 332# endif
185#endif 333#endif
186 334
187#ifndef EV_INOTIFY_HASHSIZE 335#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 336# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 337# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 338# else
191# define EV_INOTIFY_HASHSIZE 16 339# define EV_USE_SIGNALFD 0
192# endif 340# endif
193#endif 341#endif
194 342
195/**/ 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 <sys/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
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
196 382
197#ifndef CLOCK_MONOTONIC 383#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 385# define EV_USE_MONOTONIC 0
200#endif 386#endif
… …
207#if !EV_STAT_ENABLE 393#if !EV_STAT_ENABLE
208# undef EV_USE_INOTIFY 394# undef EV_USE_INOTIFY
209# define EV_USE_INOTIFY 0 395# define EV_USE_INOTIFY 0
210#endif 396#endif
211 397
398#if !EV_USE_NANOSLEEP
399/* hp-ux has it in sys/time.h, which we unconditionally include above */
400# if !defined _WIN32 && !defined __hpux
401# include <sys/select.h>
402# endif
403#endif
404
212#if EV_USE_INOTIFY 405#if EV_USE_INOTIFY
406# include <sys/statfs.h>
213# 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
214#endif 413#endif
215 414
216#if EV_SELECT_IS_WINSOCKET 415#if EV_SELECT_IS_WINSOCKET
217# include <winsock.h> 416# include <winsock.h>
218#endif 417#endif
219 418
419#if EV_USE_EVENTFD
420/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
421# include <stdint.h>
422# ifndef EFD_NONBLOCK
423# define EFD_NONBLOCK O_NONBLOCK
424# endif
425# ifndef EFD_CLOEXEC
426# ifdef O_CLOEXEC
427# define EFD_CLOEXEC O_CLOEXEC
428# else
429# define EFD_CLOEXEC 02000000
430# 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};
455#endif
456
220/**/ 457/**/
221 458
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
222/* 465/*
223 * This is used to avoid floating point rounding problems. 466 * This is used to work around floating point rounding problems.
224 * It is added to ev_rt_now when scheduling periodics
225 * to ensure progress, time-wise, even when rounding
226 * errors are against us.
227 * This value is good at least till the year 4000. 467 * This value is good at least till the year 4000.
228 * Better solutions welcome.
229 */ 468 */
230#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 */
231 471
232#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) */
233#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) */
234/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
235 474
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;
236#if __GNUC__ >= 4 519 #if __GNUC__
237# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
238# 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
239#else 526#else
240# define expect(expr,value) (expr) 527 #include <inttypes.h>
241# define noinline
242# if __STDC_VERSION__ < 199901L
243# define inline
244# 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)))
245#endif 542 #endif
543#endif
246 544
545/*****************************************************************************/
546
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549
550#if ECB_NO_THREADS
551# define ECB_NO_SMP 1
552#endif
553
554#if ECB_NO_THREADS || ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0)
556#endif
557
558#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
571 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
574 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
576 #elif __sparc || __sparc__
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined __s390__ || defined __s390x__
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #elif defined __mips__
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
584 #elif defined __alpha__
585 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
586 #endif
587 #endif
588#endif
589
590#ifndef ECB_MEMORY_FENCE
591 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
592 #define ECB_MEMORY_FENCE __sync_synchronize ()
593 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
594 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
595 #elif _MSC_VER >= 1400 /* VC++ 2005 */
596 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
597 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
598 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
599 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
600 #elif defined _WIN32
601 #include <WinNT.h>
602 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
603 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
604 #include <mbarrier.h>
605 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
606 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
607 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
608 #elif __xlC__
609 #define ECB_MEMORY_FENCE __sync ()
610 #endif
611#endif
612
613#ifndef ECB_MEMORY_FENCE
614 #if !ECB_AVOID_PTHREADS
615 /*
616 * if you get undefined symbol references to pthread_mutex_lock,
617 * or failure to find pthread.h, then you should implement
618 * the ECB_MEMORY_FENCE operations for your cpu/compiler
619 * OR provide pthread.h and link against the posix thread library
620 * of your system.
621 */
622 #include <pthread.h>
623 #define ECB_NEEDS_PTHREADS 1
624 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
625
626 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
627 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
628 #endif
629#endif
630
631#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
632 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
633#endif
634
635#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
636 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
637#endif
638
639/*****************************************************************************/
640
641#define ECB_C99 (__STDC_VERSION__ >= 199901L)
642
643#if __cplusplus
644 #define ecb_inline static inline
645#elif ECB_GCC_VERSION(2,5)
646 #define ecb_inline static __inline__
647#elif ECB_C99
648 #define ecb_inline static inline
649#else
650 #define ecb_inline static
651#endif
652
653#if ECB_GCC_VERSION(3,3)
654 #define ecb_restrict __restrict__
655#elif ECB_C99
656 #define ecb_restrict restrict
657#else
658 #define ecb_restrict
659#endif
660
661typedef int ecb_bool;
662
663#define ECB_CONCAT_(a, b) a ## b
664#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
665#define ECB_STRINGIFY_(a) # a
666#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
667
668#define ecb_function_ ecb_inline
669
670#if ECB_GCC_VERSION(3,1)
671 #define ecb_attribute(attrlist) __attribute__(attrlist)
672 #define ecb_is_constant(expr) __builtin_constant_p (expr)
673 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
674 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
675#else
676 #define ecb_attribute(attrlist)
677 #define ecb_is_constant(expr) 0
678 #define ecb_expect(expr,value) (expr)
679 #define ecb_prefetch(addr,rw,locality)
680#endif
681
682/* no emulation for ecb_decltype */
683#if ECB_GCC_VERSION(4,5)
684 #define ecb_decltype(x) __decltype(x)
685#elif ECB_GCC_VERSION(3,0)
686 #define ecb_decltype(x) __typeof(x)
687#endif
688
689#define ecb_noinline ecb_attribute ((__noinline__))
690#define ecb_noreturn ecb_attribute ((__noreturn__))
691#define ecb_unused ecb_attribute ((__unused__))
692#define ecb_const ecb_attribute ((__const__))
693#define ecb_pure ecb_attribute ((__pure__))
694
695#if ECB_GCC_VERSION(4,3)
696 #define ecb_artificial ecb_attribute ((__artificial__))
697 #define ecb_hot ecb_attribute ((__hot__))
698 #define ecb_cold ecb_attribute ((__cold__))
699#else
700 #define ecb_artificial
701 #define ecb_hot
702 #define ecb_cold
703#endif
704
705/* put around conditional expressions if you are very sure that the */
706/* expression is mostly true or mostly false. note that these return */
707/* booleans, not the expression. */
247#define expect_false(expr) expect ((expr) != 0, 0) 708#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
248#define expect_true(expr) expect ((expr) != 0, 1) 709#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
710/* for compatibility to the rest of the world */
711#define ecb_likely(expr) ecb_expect_true (expr)
712#define ecb_unlikely(expr) ecb_expect_false (expr)
713
714/* count trailing zero bits and count # of one bits */
715#if ECB_GCC_VERSION(3,4)
716 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
717 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
718 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
719 #define ecb_ctz32(x) __builtin_ctz (x)
720 #define ecb_ctz64(x) __builtin_ctzll (x)
721 #define ecb_popcount32(x) __builtin_popcount (x)
722 /* no popcountll */
723#else
724 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
725 ecb_function_ int
726 ecb_ctz32 (uint32_t x)
727 {
728 int r = 0;
729
730 x &= ~x + 1; /* this isolates the lowest bit */
731
732#if ECB_branchless_on_i386
733 r += !!(x & 0xaaaaaaaa) << 0;
734 r += !!(x & 0xcccccccc) << 1;
735 r += !!(x & 0xf0f0f0f0) << 2;
736 r += !!(x & 0xff00ff00) << 3;
737 r += !!(x & 0xffff0000) << 4;
738#else
739 if (x & 0xaaaaaaaa) r += 1;
740 if (x & 0xcccccccc) r += 2;
741 if (x & 0xf0f0f0f0) r += 4;
742 if (x & 0xff00ff00) r += 8;
743 if (x & 0xffff0000) r += 16;
744#endif
745
746 return r;
747 }
748
749 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
750 ecb_function_ int
751 ecb_ctz64 (uint64_t x)
752 {
753 int shift = x & 0xffffffffU ? 0 : 32;
754 return ecb_ctz32 (x >> shift) + shift;
755 }
756
757 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
758 ecb_function_ int
759 ecb_popcount32 (uint32_t x)
760 {
761 x -= (x >> 1) & 0x55555555;
762 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
763 x = ((x >> 4) + x) & 0x0f0f0f0f;
764 x *= 0x01010101;
765
766 return x >> 24;
767 }
768
769 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
770 ecb_function_ int ecb_ld32 (uint32_t x)
771 {
772 int r = 0;
773
774 if (x >> 16) { x >>= 16; r += 16; }
775 if (x >> 8) { x >>= 8; r += 8; }
776 if (x >> 4) { x >>= 4; r += 4; }
777 if (x >> 2) { x >>= 2; r += 2; }
778 if (x >> 1) { r += 1; }
779
780 return r;
781 }
782
783 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
784 ecb_function_ int ecb_ld64 (uint64_t x)
785 {
786 int r = 0;
787
788 if (x >> 32) { x >>= 32; r += 32; }
789
790 return r + ecb_ld32 (x);
791 }
792#endif
793
794ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
796{
797 return ( (x * 0x0802U & 0x22110U)
798 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
799}
800
801ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
802ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
803{
804 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
805 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
806 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
807 x = ( x >> 8 ) | ( x << 8);
808
809 return x;
810}
811
812ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
813ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
814{
815 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
816 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
817 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
818 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
819 x = ( x >> 16 ) | ( x << 16);
820
821 return x;
822}
823
824/* popcount64 is only available on 64 bit cpus as gcc builtin */
825/* so for this version we are lazy */
826ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
827ecb_function_ int
828ecb_popcount64 (uint64_t x)
829{
830 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
831}
832
833ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
834ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
835ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
836ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
837ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
838ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
839ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
840ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
841
842ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
843ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
844ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
845ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
846ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
847ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
848ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
849ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
850
851#if ECB_GCC_VERSION(4,3)
852 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
853 #define ecb_bswap32(x) __builtin_bswap32 (x)
854 #define ecb_bswap64(x) __builtin_bswap64 (x)
855#else
856 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
857 ecb_function_ uint16_t
858 ecb_bswap16 (uint16_t x)
859 {
860 return ecb_rotl16 (x, 8);
861 }
862
863 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
864 ecb_function_ uint32_t
865 ecb_bswap32 (uint32_t x)
866 {
867 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
868 }
869
870 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
871 ecb_function_ uint64_t
872 ecb_bswap64 (uint64_t x)
873 {
874 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
875 }
876#endif
877
878#if ECB_GCC_VERSION(4,5)
879 #define ecb_unreachable() __builtin_unreachable ()
880#else
881 /* this seems to work fine, but gcc always emits a warning for it :/ */
882 ecb_inline void ecb_unreachable (void) ecb_noreturn;
883 ecb_inline void ecb_unreachable (void) { }
884#endif
885
886/* try to tell the compiler that some condition is definitely true */
887#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
888
889ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
890ecb_inline unsigned char
891ecb_byteorder_helper (void)
892{
893 const uint32_t u = 0x11223344;
894 return *(unsigned char *)&u;
895}
896
897ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
898ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
899ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
900ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
901
902#if ECB_GCC_VERSION(3,0) || ECB_C99
903 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
904#else
905 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
906#endif
907
908#if __cplusplus
909 template<typename T>
910 static inline T ecb_div_rd (T val, T div)
911 {
912 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
913 }
914 template<typename T>
915 static inline T ecb_div_ru (T val, T div)
916 {
917 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
918 }
919#else
920 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
921 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
922#endif
923
924#if ecb_cplusplus_does_not_suck
925 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
926 template<typename T, int N>
927 static inline int ecb_array_length (const T (&arr)[N])
928 {
929 return N;
930 }
931#else
932 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
933#endif
934
935#endif
936
937/* ECB.H END */
938
939#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
940/* if your architecture doesn't need memory fences, e.g. because it is
941 * single-cpu/core, or if you use libev in a project that doesn't use libev
942 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
943 * libev, in which cases the memory fences become nops.
944 * alternatively, you can remove this #error and link against libpthread,
945 * which will then provide the memory fences.
946 */
947# error "memory fences not defined for your architecture, please report"
948#endif
949
950#ifndef ECB_MEMORY_FENCE
951# define ECB_MEMORY_FENCE do { } while (0)
952# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
953# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
954#endif
955
956#define expect_false(cond) ecb_expect_false (cond)
957#define expect_true(cond) ecb_expect_true (cond)
958#define noinline ecb_noinline
959
249#define inline_size static inline 960#define inline_size ecb_inline
250 961
251#if EV_MINIMAL 962#if EV_FEATURE_CODE
963# define inline_speed ecb_inline
964#else
252# define inline_speed static noinline 965# define inline_speed static noinline
966#endif
967
968#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
969
970#if EV_MINPRI == EV_MAXPRI
971# define ABSPRI(w) (((W)w), 0)
253#else 972#else
254# define inline_speed static inline
255#endif
256
257#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
258#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 973# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
974#endif
259 975
260#define EMPTY /* required for microsofts broken pseudo-c compiler */ 976#define EMPTY /* required for microsofts broken pseudo-c compiler */
261#define EMPTY2(a,b) /* used to suppress some warnings */ 977#define EMPTY2(a,b) /* used to suppress some warnings */
262 978
263typedef ev_watcher *W; 979typedef ev_watcher *W;
264typedef ev_watcher_list *WL; 980typedef ev_watcher_list *WL;
265typedef ev_watcher_time *WT; 981typedef ev_watcher_time *WT;
266 982
983#define ev_active(w) ((W)(w))->active
984#define ev_at(w) ((WT)(w))->at
985
986#if EV_USE_REALTIME
987/* sig_atomic_t is used to avoid per-thread variables or locking but still */
988/* giving it a reasonably high chance of working on typical architectures */
989static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
990#endif
991
992#if EV_USE_MONOTONIC
267static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 993static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
994#endif
995
996#ifndef EV_FD_TO_WIN32_HANDLE
997# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
998#endif
999#ifndef EV_WIN32_HANDLE_TO_FD
1000# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1001#endif
1002#ifndef EV_WIN32_CLOSE_FD
1003# define EV_WIN32_CLOSE_FD(fd) close (fd)
1004#endif
268 1005
269#ifdef _WIN32 1006#ifdef _WIN32
270# include "ev_win32.c" 1007# include "ev_win32.c"
271#endif 1008#endif
272 1009
273/*****************************************************************************/ 1010/*****************************************************************************/
274 1011
1012/* define a suitable floor function (only used by periodics atm) */
1013
1014#if EV_USE_FLOOR
1015# include <math.h>
1016# define ev_floor(v) floor (v)
1017#else
1018
1019#include <float.h>
1020
1021/* a floor() replacement function, should be independent of ev_tstamp type */
1022static ev_tstamp noinline
1023ev_floor (ev_tstamp v)
1024{
1025 /* the choice of shift factor is not terribly important */
1026#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1027 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1028#else
1029 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1030#endif
1031
1032 /* argument too large for an unsigned long? */
1033 if (expect_false (v >= shift))
1034 {
1035 ev_tstamp f;
1036
1037 if (v == v - 1.)
1038 return v; /* very large number */
1039
1040 f = shift * ev_floor (v * (1. / shift));
1041 return f + ev_floor (v - f);
1042 }
1043
1044 /* special treatment for negative args? */
1045 if (expect_false (v < 0.))
1046 {
1047 ev_tstamp f = -ev_floor (-v);
1048
1049 return f - (f == v ? 0 : 1);
1050 }
1051
1052 /* fits into an unsigned long */
1053 return (unsigned long)v;
1054}
1055
1056#endif
1057
1058/*****************************************************************************/
1059
1060#ifdef __linux
1061# include <sys/utsname.h>
1062#endif
1063
1064static unsigned int noinline ecb_cold
1065ev_linux_version (void)
1066{
1067#ifdef __linux
1068 unsigned int v = 0;
1069 struct utsname buf;
1070 int i;
1071 char *p = buf.release;
1072
1073 if (uname (&buf))
1074 return 0;
1075
1076 for (i = 3+1; --i; )
1077 {
1078 unsigned int c = 0;
1079
1080 for (;;)
1081 {
1082 if (*p >= '0' && *p <= '9')
1083 c = c * 10 + *p++ - '0';
1084 else
1085 {
1086 p += *p == '.';
1087 break;
1088 }
1089 }
1090
1091 v = (v << 8) | c;
1092 }
1093
1094 return v;
1095#else
1096 return 0;
1097#endif
1098}
1099
1100/*****************************************************************************/
1101
1102#if EV_AVOID_STDIO
1103static void noinline ecb_cold
1104ev_printerr (const char *msg)
1105{
1106 write (STDERR_FILENO, msg, strlen (msg));
1107}
1108#endif
1109
275static void (*syserr_cb)(const char *msg); 1110static void (*syserr_cb)(const char *msg) EV_THROW;
276 1111
277void 1112void ecb_cold
278ev_set_syserr_cb (void (*cb)(const char *msg)) 1113ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
279{ 1114{
280 syserr_cb = cb; 1115 syserr_cb = cb;
281} 1116}
282 1117
283static void noinline 1118static void noinline ecb_cold
284syserr (const char *msg) 1119ev_syserr (const char *msg)
285{ 1120{
286 if (!msg) 1121 if (!msg)
287 msg = "(libev) system error"; 1122 msg = "(libev) system error";
288 1123
289 if (syserr_cb) 1124 if (syserr_cb)
290 syserr_cb (msg); 1125 syserr_cb (msg);
291 else 1126 else
292 { 1127 {
1128#if EV_AVOID_STDIO
1129 ev_printerr (msg);
1130 ev_printerr (": ");
1131 ev_printerr (strerror (errno));
1132 ev_printerr ("\n");
1133#else
293 perror (msg); 1134 perror (msg);
1135#endif
294 abort (); 1136 abort ();
295 } 1137 }
296} 1138}
297 1139
1140static void *
1141ev_realloc_emul (void *ptr, long size)
1142{
1143#if __GLIBC__
1144 return realloc (ptr, size);
1145#else
1146 /* some systems, notably openbsd and darwin, fail to properly
1147 * implement realloc (x, 0) (as required by both ansi c-89 and
1148 * the single unix specification, so work around them here.
1149 */
1150
1151 if (size)
1152 return realloc (ptr, size);
1153
1154 free (ptr);
1155 return 0;
1156#endif
1157}
1158
298static void *(*alloc)(void *ptr, long size); 1159static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
299 1160
300void 1161void ecb_cold
301ev_set_allocator (void *(*cb)(void *ptr, long size)) 1162ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
302{ 1163{
303 alloc = cb; 1164 alloc = cb;
304} 1165}
305 1166
306inline_speed void * 1167inline_speed void *
307ev_realloc (void *ptr, long size) 1168ev_realloc (void *ptr, long size)
308{ 1169{
309 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1170 ptr = alloc (ptr, size);
310 1171
311 if (!ptr && size) 1172 if (!ptr && size)
312 { 1173 {
1174#if EV_AVOID_STDIO
1175 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1176#else
313 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1177 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1178#endif
314 abort (); 1179 abort ();
315 } 1180 }
316 1181
317 return ptr; 1182 return ptr;
318} 1183}
… …
320#define ev_malloc(size) ev_realloc (0, (size)) 1185#define ev_malloc(size) ev_realloc (0, (size))
321#define ev_free(ptr) ev_realloc ((ptr), 0) 1186#define ev_free(ptr) ev_realloc ((ptr), 0)
322 1187
323/*****************************************************************************/ 1188/*****************************************************************************/
324 1189
1190/* set in reify when reification needed */
1191#define EV_ANFD_REIFY 1
1192
1193/* file descriptor info structure */
325typedef struct 1194typedef struct
326{ 1195{
327 WL head; 1196 WL head;
328 unsigned char events; 1197 unsigned char events; /* the events watched for */
1198 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1199 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
329 unsigned char reify; 1200 unsigned char unused;
1201#if EV_USE_EPOLL
1202 unsigned int egen; /* generation counter to counter epoll bugs */
1203#endif
330#if EV_SELECT_IS_WINSOCKET 1204#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
331 SOCKET handle; 1205 SOCKET handle;
332#endif 1206#endif
1207#if EV_USE_IOCP
1208 OVERLAPPED or, ow;
1209#endif
333} ANFD; 1210} ANFD;
334 1211
1212/* stores the pending event set for a given watcher */
335typedef struct 1213typedef struct
336{ 1214{
337 W w; 1215 W w;
338 int events; 1216 int events; /* the pending event set for the given watcher */
339} ANPENDING; 1217} ANPENDING;
340 1218
341#if EV_USE_INOTIFY 1219#if EV_USE_INOTIFY
1220/* hash table entry per inotify-id */
342typedef struct 1221typedef struct
343{ 1222{
344 WL head; 1223 WL head;
345} ANFS; 1224} ANFS;
1225#endif
1226
1227/* Heap Entry */
1228#if EV_HEAP_CACHE_AT
1229 /* a heap element */
1230 typedef struct {
1231 ev_tstamp at;
1232 WT w;
1233 } ANHE;
1234
1235 #define ANHE_w(he) (he).w /* access watcher, read-write */
1236 #define ANHE_at(he) (he).at /* access cached at, read-only */
1237 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1238#else
1239 /* a heap element */
1240 typedef WT ANHE;
1241
1242 #define ANHE_w(he) (he)
1243 #define ANHE_at(he) (he)->at
1244 #define ANHE_at_cache(he)
346#endif 1245#endif
347 1246
348#if EV_MULTIPLICITY 1247#if EV_MULTIPLICITY
349 1248
350 struct ev_loop 1249 struct ev_loop
… …
356 #undef VAR 1255 #undef VAR
357 }; 1256 };
358 #include "ev_wrap.h" 1257 #include "ev_wrap.h"
359 1258
360 static struct ev_loop default_loop_struct; 1259 static struct ev_loop default_loop_struct;
361 struct ev_loop *ev_default_loop_ptr; 1260 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
362 1261
363#else 1262#else
364 1263
365 ev_tstamp ev_rt_now; 1264 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
366 #define VAR(name,decl) static decl; 1265 #define VAR(name,decl) static decl;
367 #include "ev_vars.h" 1266 #include "ev_vars.h"
368 #undef VAR 1267 #undef VAR
369 1268
370 static int ev_default_loop_ptr; 1269 static int ev_default_loop_ptr;
371 1270
372#endif 1271#endif
373 1272
1273#if EV_FEATURE_API
1274# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1275# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1276# define EV_INVOKE_PENDING invoke_cb (EV_A)
1277#else
1278# define EV_RELEASE_CB (void)0
1279# define EV_ACQUIRE_CB (void)0
1280# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1281#endif
1282
1283#define EVBREAK_RECURSE 0x80
1284
374/*****************************************************************************/ 1285/*****************************************************************************/
375 1286
1287#ifndef EV_HAVE_EV_TIME
376ev_tstamp 1288ev_tstamp
377ev_time (void) 1289ev_time (void) EV_THROW
378{ 1290{
379#if EV_USE_REALTIME 1291#if EV_USE_REALTIME
1292 if (expect_true (have_realtime))
1293 {
380 struct timespec ts; 1294 struct timespec ts;
381 clock_gettime (CLOCK_REALTIME, &ts); 1295 clock_gettime (CLOCK_REALTIME, &ts);
382 return ts.tv_sec + ts.tv_nsec * 1e-9; 1296 return ts.tv_sec + ts.tv_nsec * 1e-9;
383#else 1297 }
1298#endif
1299
384 struct timeval tv; 1300 struct timeval tv;
385 gettimeofday (&tv, 0); 1301 gettimeofday (&tv, 0);
386 return tv.tv_sec + tv.tv_usec * 1e-6; 1302 return tv.tv_sec + tv.tv_usec * 1e-6;
387#endif
388} 1303}
1304#endif
389 1305
390ev_tstamp inline_size 1306inline_size ev_tstamp
391get_clock (void) 1307get_clock (void)
392{ 1308{
393#if EV_USE_MONOTONIC 1309#if EV_USE_MONOTONIC
394 if (expect_true (have_monotonic)) 1310 if (expect_true (have_monotonic))
395 { 1311 {
… …
402 return ev_time (); 1318 return ev_time ();
403} 1319}
404 1320
405#if EV_MULTIPLICITY 1321#if EV_MULTIPLICITY
406ev_tstamp 1322ev_tstamp
407ev_now (EV_P) 1323ev_now (EV_P) EV_THROW
408{ 1324{
409 return ev_rt_now; 1325 return ev_rt_now;
410} 1326}
411#endif 1327#endif
412 1328
413int inline_size 1329void
1330ev_sleep (ev_tstamp delay) EV_THROW
1331{
1332 if (delay > 0.)
1333 {
1334#if EV_USE_NANOSLEEP
1335 struct timespec ts;
1336
1337 EV_TS_SET (ts, delay);
1338 nanosleep (&ts, 0);
1339#elif defined _WIN32
1340 Sleep ((unsigned long)(delay * 1e3));
1341#else
1342 struct timeval tv;
1343
1344 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1345 /* something not guaranteed by newer posix versions, but guaranteed */
1346 /* by older ones */
1347 EV_TV_SET (tv, delay);
1348 select (0, 0, 0, 0, &tv);
1349#endif
1350 }
1351}
1352
1353/*****************************************************************************/
1354
1355#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1356
1357/* find a suitable new size for the given array, */
1358/* hopefully by rounding to a nice-to-malloc size */
1359inline_size int
414array_nextsize (int elem, int cur, int cnt) 1360array_nextsize (int elem, int cur, int cnt)
415{ 1361{
416 int ncur = cur + 1; 1362 int ncur = cur + 1;
417 1363
418 do 1364 do
419 ncur <<= 1; 1365 ncur <<= 1;
420 while (cnt > ncur); 1366 while (cnt > ncur);
421 1367
422 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1368 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
423 if (elem * ncur > 4096) 1369 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
424 { 1370 {
425 ncur *= elem; 1371 ncur *= elem;
426 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1372 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
427 ncur = ncur - sizeof (void *) * 4; 1373 ncur = ncur - sizeof (void *) * 4;
428 ncur /= elem; 1374 ncur /= elem;
429 } 1375 }
430 1376
431 return ncur; 1377 return ncur;
432} 1378}
433 1379
434static noinline void * 1380static void * noinline ecb_cold
435array_realloc (int elem, void *base, int *cur, int cnt) 1381array_realloc (int elem, void *base, int *cur, int cnt)
436{ 1382{
437 *cur = array_nextsize (elem, *cur, cnt); 1383 *cur = array_nextsize (elem, *cur, cnt);
438 return ev_realloc (base, elem * *cur); 1384 return ev_realloc (base, elem * *cur);
439} 1385}
1386
1387#define array_init_zero(base,count) \
1388 memset ((void *)(base), 0, sizeof (*(base)) * (count))
440 1389
441#define array_needsize(type,base,cur,cnt,init) \ 1390#define array_needsize(type,base,cur,cnt,init) \
442 if (expect_false ((cnt) > (cur))) \ 1391 if (expect_false ((cnt) > (cur))) \
443 { \ 1392 { \
444 int ocur_ = (cur); \ 1393 int ecb_unused ocur_ = (cur); \
445 (base) = (type *)array_realloc \ 1394 (base) = (type *)array_realloc \
446 (sizeof (type), (base), &(cur), (cnt)); \ 1395 (sizeof (type), (base), &(cur), (cnt)); \
447 init ((base) + (ocur_), (cur) - ocur_); \ 1396 init ((base) + (ocur_), (cur) - ocur_); \
448 } 1397 }
449 1398
… …
456 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1405 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
457 } 1406 }
458#endif 1407#endif
459 1408
460#define array_free(stem, idx) \ 1409#define array_free(stem, idx) \
461 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1410 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
462 1411
463/*****************************************************************************/ 1412/*****************************************************************************/
464 1413
1414/* dummy callback for pending events */
1415static void noinline
1416pendingcb (EV_P_ ev_prepare *w, int revents)
1417{
1418}
1419
465void noinline 1420void noinline
466ev_feed_event (EV_P_ void *w, int revents) 1421ev_feed_event (EV_P_ void *w, int revents) EV_THROW
467{ 1422{
468 W w_ = (W)w; 1423 W w_ = (W)w;
469 int pri = ABSPRI (w_); 1424 int pri = ABSPRI (w_);
470 1425
471 if (expect_false (w_->pending)) 1426 if (expect_false (w_->pending))
… …
475 w_->pending = ++pendingcnt [pri]; 1430 w_->pending = ++pendingcnt [pri];
476 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1431 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
477 pendings [pri][w_->pending - 1].w = w_; 1432 pendings [pri][w_->pending - 1].w = w_;
478 pendings [pri][w_->pending - 1].events = revents; 1433 pendings [pri][w_->pending - 1].events = revents;
479 } 1434 }
480}
481 1435
482void inline_speed 1436 pendingpri = NUMPRI - 1;
1437}
1438
1439inline_speed void
1440feed_reverse (EV_P_ W w)
1441{
1442 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1443 rfeeds [rfeedcnt++] = w;
1444}
1445
1446inline_size void
1447feed_reverse_done (EV_P_ int revents)
1448{
1449 do
1450 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1451 while (rfeedcnt);
1452}
1453
1454inline_speed void
483queue_events (EV_P_ W *events, int eventcnt, int type) 1455queue_events (EV_P_ W *events, int eventcnt, int type)
484{ 1456{
485 int i; 1457 int i;
486 1458
487 for (i = 0; i < eventcnt; ++i) 1459 for (i = 0; i < eventcnt; ++i)
488 ev_feed_event (EV_A_ events [i], type); 1460 ev_feed_event (EV_A_ events [i], type);
489} 1461}
490 1462
491/*****************************************************************************/ 1463/*****************************************************************************/
492 1464
493void inline_size 1465inline_speed void
494anfds_init (ANFD *base, int count)
495{
496 while (count--)
497 {
498 base->head = 0;
499 base->events = EV_NONE;
500 base->reify = 0;
501
502 ++base;
503 }
504}
505
506void inline_speed
507fd_event (EV_P_ int fd, int revents) 1466fd_event_nocheck (EV_P_ int fd, int revents)
508{ 1467{
509 ANFD *anfd = anfds + fd; 1468 ANFD *anfd = anfds + fd;
510 ev_io *w; 1469 ev_io *w;
511 1470
512 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1471 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
516 if (ev) 1475 if (ev)
517 ev_feed_event (EV_A_ (W)w, ev); 1476 ev_feed_event (EV_A_ (W)w, ev);
518 } 1477 }
519} 1478}
520 1479
1480/* do not submit kernel events for fds that have reify set */
1481/* because that means they changed while we were polling for new events */
1482inline_speed void
1483fd_event (EV_P_ int fd, int revents)
1484{
1485 ANFD *anfd = anfds + fd;
1486
1487 if (expect_true (!anfd->reify))
1488 fd_event_nocheck (EV_A_ fd, revents);
1489}
1490
521void 1491void
522ev_feed_fd_event (EV_P_ int fd, int revents) 1492ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
523{ 1493{
524 if (fd >= 0 && fd < anfdmax) 1494 if (fd >= 0 && fd < anfdmax)
525 fd_event (EV_A_ fd, revents); 1495 fd_event_nocheck (EV_A_ fd, revents);
526} 1496}
527 1497
528void inline_size 1498/* make sure the external fd watch events are in-sync */
1499/* with the kernel/libev internal state */
1500inline_size void
529fd_reify (EV_P) 1501fd_reify (EV_P)
530{ 1502{
531 int i; 1503 int i;
1504
1505#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1506 for (i = 0; i < fdchangecnt; ++i)
1507 {
1508 int fd = fdchanges [i];
1509 ANFD *anfd = anfds + fd;
1510
1511 if (anfd->reify & EV__IOFDSET && anfd->head)
1512 {
1513 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1514
1515 if (handle != anfd->handle)
1516 {
1517 unsigned long arg;
1518
1519 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1520
1521 /* handle changed, but fd didn't - we need to do it in two steps */
1522 backend_modify (EV_A_ fd, anfd->events, 0);
1523 anfd->events = 0;
1524 anfd->handle = handle;
1525 }
1526 }
1527 }
1528#endif
532 1529
533 for (i = 0; i < fdchangecnt; ++i) 1530 for (i = 0; i < fdchangecnt; ++i)
534 { 1531 {
535 int fd = fdchanges [i]; 1532 int fd = fdchanges [i];
536 ANFD *anfd = anfds + fd; 1533 ANFD *anfd = anfds + fd;
537 ev_io *w; 1534 ev_io *w;
538 1535
539 unsigned char events = 0; 1536 unsigned char o_events = anfd->events;
1537 unsigned char o_reify = anfd->reify;
540 1538
541 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1539 anfd->reify = 0;
542 events |= (unsigned char)w->events;
543 1540
544#if EV_SELECT_IS_WINSOCKET 1541 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
545 if (events)
546 { 1542 {
547 unsigned long argp; 1543 anfd->events = 0;
548 anfd->handle = _get_osfhandle (fd); 1544
549 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1545 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1546 anfd->events |= (unsigned char)w->events;
1547
1548 if (o_events != anfd->events)
1549 o_reify = EV__IOFDSET; /* actually |= */
550 } 1550 }
551#endif
552 1551
553 { 1552 if (o_reify & EV__IOFDSET)
554 unsigned char o_events = anfd->events;
555 unsigned char o_reify = anfd->reify;
556
557 anfd->reify = 0;
558 anfd->events = events;
559
560 if (o_events != events || o_reify & EV_IOFDSET)
561 backend_modify (EV_A_ fd, o_events, events); 1553 backend_modify (EV_A_ fd, o_events, anfd->events);
562 }
563 } 1554 }
564 1555
565 fdchangecnt = 0; 1556 fdchangecnt = 0;
566} 1557}
567 1558
568void inline_size 1559/* something about the given fd changed */
1560inline_size void
569fd_change (EV_P_ int fd, int flags) 1561fd_change (EV_P_ int fd, int flags)
570{ 1562{
571 unsigned char reify = anfds [fd].reify; 1563 unsigned char reify = anfds [fd].reify;
572 anfds [fd].reify |= flags; 1564 anfds [fd].reify |= flags;
573 1565
… …
577 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1569 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
578 fdchanges [fdchangecnt - 1] = fd; 1570 fdchanges [fdchangecnt - 1] = fd;
579 } 1571 }
580} 1572}
581 1573
582void inline_speed 1574/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1575inline_speed void ecb_cold
583fd_kill (EV_P_ int fd) 1576fd_kill (EV_P_ int fd)
584{ 1577{
585 ev_io *w; 1578 ev_io *w;
586 1579
587 while ((w = (ev_io *)anfds [fd].head)) 1580 while ((w = (ev_io *)anfds [fd].head))
… …
589 ev_io_stop (EV_A_ w); 1582 ev_io_stop (EV_A_ w);
590 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1583 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
591 } 1584 }
592} 1585}
593 1586
594int inline_size 1587/* check whether the given fd is actually valid, for error recovery */
1588inline_size int ecb_cold
595fd_valid (int fd) 1589fd_valid (int fd)
596{ 1590{
597#ifdef _WIN32 1591#ifdef _WIN32
598 return _get_osfhandle (fd) != -1; 1592 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
599#else 1593#else
600 return fcntl (fd, F_GETFD) != -1; 1594 return fcntl (fd, F_GETFD) != -1;
601#endif 1595#endif
602} 1596}
603 1597
604/* called on EBADF to verify fds */ 1598/* called on EBADF to verify fds */
605static void noinline 1599static void noinline ecb_cold
606fd_ebadf (EV_P) 1600fd_ebadf (EV_P)
607{ 1601{
608 int fd; 1602 int fd;
609 1603
610 for (fd = 0; fd < anfdmax; ++fd) 1604 for (fd = 0; fd < anfdmax; ++fd)
611 if (anfds [fd].events) 1605 if (anfds [fd].events)
612 if (!fd_valid (fd) == -1 && errno == EBADF) 1606 if (!fd_valid (fd) && errno == EBADF)
613 fd_kill (EV_A_ fd); 1607 fd_kill (EV_A_ fd);
614} 1608}
615 1609
616/* called on ENOMEM in select/poll to kill some fds and retry */ 1610/* called on ENOMEM in select/poll to kill some fds and retry */
617static void noinline 1611static void noinline ecb_cold
618fd_enomem (EV_P) 1612fd_enomem (EV_P)
619{ 1613{
620 int fd; 1614 int fd;
621 1615
622 for (fd = anfdmax; fd--; ) 1616 for (fd = anfdmax; fd--; )
623 if (anfds [fd].events) 1617 if (anfds [fd].events)
624 { 1618 {
625 fd_kill (EV_A_ fd); 1619 fd_kill (EV_A_ fd);
626 return; 1620 break;
627 } 1621 }
628} 1622}
629 1623
630/* usually called after fork if backend needs to re-arm all fds from scratch */ 1624/* usually called after fork if backend needs to re-arm all fds from scratch */
631static void noinline 1625static void noinline
… …
635 1629
636 for (fd = 0; fd < anfdmax; ++fd) 1630 for (fd = 0; fd < anfdmax; ++fd)
637 if (anfds [fd].events) 1631 if (anfds [fd].events)
638 { 1632 {
639 anfds [fd].events = 0; 1633 anfds [fd].events = 0;
1634 anfds [fd].emask = 0;
640 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1635 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
641 } 1636 }
642} 1637}
643 1638
644/*****************************************************************************/ 1639/* used to prepare libev internal fd's */
645 1640/* this is not fork-safe */
646void inline_speed 1641inline_speed void
647upheap (WT *heap, int k)
648{
649 WT w = heap [k];
650
651 while (k)
652 {
653 int p = (k - 1) >> 1;
654
655 if (heap [p]->at <= w->at)
656 break;
657
658 heap [k] = heap [p];
659 ((W)heap [k])->active = k + 1;
660 k = p;
661 }
662
663 heap [k] = w;
664 ((W)heap [k])->active = k + 1;
665}
666
667void inline_speed
668downheap (WT *heap, int N, int k)
669{
670 WT w = heap [k];
671
672 for (;;)
673 {
674 int c = (k << 1) + 1;
675
676 if (c >= N)
677 break;
678
679 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
680 ? 1 : 0;
681
682 if (w->at <= heap [c]->at)
683 break;
684
685 heap [k] = heap [c];
686 ((W)heap [k])->active = k + 1;
687
688 k = c;
689 }
690
691 heap [k] = w;
692 ((W)heap [k])->active = k + 1;
693}
694
695void inline_size
696adjustheap (WT *heap, int N, int k)
697{
698 upheap (heap, k);
699 downheap (heap, N, k);
700}
701
702/*****************************************************************************/
703
704typedef struct
705{
706 WL head;
707 sig_atomic_t volatile gotsig;
708} ANSIG;
709
710static ANSIG *signals;
711static int signalmax;
712
713static int sigpipe [2];
714static sig_atomic_t volatile gotsig;
715static ev_io sigev;
716
717void inline_size
718signals_init (ANSIG *base, int count)
719{
720 while (count--)
721 {
722 base->head = 0;
723 base->gotsig = 0;
724
725 ++base;
726 }
727}
728
729static void
730sighandler (int signum)
731{
732#if _WIN32
733 signal (signum, sighandler);
734#endif
735
736 signals [signum - 1].gotsig = 1;
737
738 if (!gotsig)
739 {
740 int old_errno = errno;
741 gotsig = 1;
742 write (sigpipe [1], &signum, 1);
743 errno = old_errno;
744 }
745}
746
747void noinline
748ev_feed_signal_event (EV_P_ int signum)
749{
750 WL w;
751
752#if EV_MULTIPLICITY
753 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
754#endif
755
756 --signum;
757
758 if (signum < 0 || signum >= signalmax)
759 return;
760
761 signals [signum].gotsig = 0;
762
763 for (w = signals [signum].head; w; w = w->next)
764 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
765}
766
767static void
768sigcb (EV_P_ ev_io *iow, int revents)
769{
770 int signum;
771
772 read (sigpipe [0], &revents, 1);
773 gotsig = 0;
774
775 for (signum = signalmax; signum--; )
776 if (signals [signum].gotsig)
777 ev_feed_signal_event (EV_A_ signum + 1);
778}
779
780void inline_speed
781fd_intern (int fd) 1642fd_intern (int fd)
782{ 1643{
783#ifdef _WIN32 1644#ifdef _WIN32
784 int arg = 1; 1645 unsigned long arg = 1;
785 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1646 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
786#else 1647#else
787 fcntl (fd, F_SETFD, FD_CLOEXEC); 1648 fcntl (fd, F_SETFD, FD_CLOEXEC);
788 fcntl (fd, F_SETFL, O_NONBLOCK); 1649 fcntl (fd, F_SETFL, O_NONBLOCK);
789#endif 1650#endif
790} 1651}
791 1652
792static void noinline
793siginit (EV_P)
794{
795 fd_intern (sigpipe [0]);
796 fd_intern (sigpipe [1]);
797
798 ev_io_set (&sigev, sigpipe [0], EV_READ);
799 ev_io_start (EV_A_ &sigev);
800 ev_unref (EV_A); /* child watcher should not keep loop alive */
801}
802
803/*****************************************************************************/ 1653/*****************************************************************************/
804 1654
1655/*
1656 * the heap functions want a real array index. array index 0 is guaranteed to not
1657 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1658 * the branching factor of the d-tree.
1659 */
1660
1661/*
1662 * at the moment we allow libev the luxury of two heaps,
1663 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1664 * which is more cache-efficient.
1665 * the difference is about 5% with 50000+ watchers.
1666 */
1667#if EV_USE_4HEAP
1668
1669#define DHEAP 4
1670#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1671#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1672#define UPHEAP_DONE(p,k) ((p) == (k))
1673
1674/* away from the root */
1675inline_speed void
1676downheap (ANHE *heap, int N, int k)
1677{
1678 ANHE he = heap [k];
1679 ANHE *E = heap + N + HEAP0;
1680
1681 for (;;)
1682 {
1683 ev_tstamp minat;
1684 ANHE *minpos;
1685 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1686
1687 /* find minimum child */
1688 if (expect_true (pos + DHEAP - 1 < E))
1689 {
1690 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1691 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1692 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1693 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1694 }
1695 else if (pos < E)
1696 {
1697 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1698 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1699 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1700 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1701 }
1702 else
1703 break;
1704
1705 if (ANHE_at (he) <= minat)
1706 break;
1707
1708 heap [k] = *minpos;
1709 ev_active (ANHE_w (*minpos)) = k;
1710
1711 k = minpos - heap;
1712 }
1713
1714 heap [k] = he;
1715 ev_active (ANHE_w (he)) = k;
1716}
1717
1718#else /* 4HEAP */
1719
1720#define HEAP0 1
1721#define HPARENT(k) ((k) >> 1)
1722#define UPHEAP_DONE(p,k) (!(p))
1723
1724/* away from the root */
1725inline_speed void
1726downheap (ANHE *heap, int N, int k)
1727{
1728 ANHE he = heap [k];
1729
1730 for (;;)
1731 {
1732 int c = k << 1;
1733
1734 if (c >= N + HEAP0)
1735 break;
1736
1737 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1738 ? 1 : 0;
1739
1740 if (ANHE_at (he) <= ANHE_at (heap [c]))
1741 break;
1742
1743 heap [k] = heap [c];
1744 ev_active (ANHE_w (heap [k])) = k;
1745
1746 k = c;
1747 }
1748
1749 heap [k] = he;
1750 ev_active (ANHE_w (he)) = k;
1751}
1752#endif
1753
1754/* towards the root */
1755inline_speed void
1756upheap (ANHE *heap, int k)
1757{
1758 ANHE he = heap [k];
1759
1760 for (;;)
1761 {
1762 int p = HPARENT (k);
1763
1764 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1765 break;
1766
1767 heap [k] = heap [p];
1768 ev_active (ANHE_w (heap [k])) = k;
1769 k = p;
1770 }
1771
1772 heap [k] = he;
1773 ev_active (ANHE_w (he)) = k;
1774}
1775
1776/* move an element suitably so it is in a correct place */
1777inline_size void
1778adjustheap (ANHE *heap, int N, int k)
1779{
1780 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1781 upheap (heap, k);
1782 else
1783 downheap (heap, N, k);
1784}
1785
1786/* rebuild the heap: this function is used only once and executed rarely */
1787inline_size void
1788reheap (ANHE *heap, int N)
1789{
1790 int i;
1791
1792 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1793 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1794 for (i = 0; i < N; ++i)
1795 upheap (heap, i + HEAP0);
1796}
1797
1798/*****************************************************************************/
1799
1800/* associate signal watchers to a signal signal */
1801typedef struct
1802{
1803 EV_ATOMIC_T pending;
1804#if EV_MULTIPLICITY
1805 EV_P;
1806#endif
1807 WL head;
1808} ANSIG;
1809
1810static ANSIG signals [EV_NSIG - 1];
1811
1812/*****************************************************************************/
1813
1814#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1815
1816static void noinline ecb_cold
1817evpipe_init (EV_P)
1818{
1819 if (!ev_is_active (&pipe_w))
1820 {
1821# if EV_USE_EVENTFD
1822 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1823 if (evfd < 0 && errno == EINVAL)
1824 evfd = eventfd (0, 0);
1825
1826 if (evfd >= 0)
1827 {
1828 evpipe [0] = -1;
1829 fd_intern (evfd); /* doing it twice doesn't hurt */
1830 ev_io_set (&pipe_w, evfd, EV_READ);
1831 }
1832 else
1833# endif
1834 {
1835 while (pipe (evpipe))
1836 ev_syserr ("(libev) error creating signal/async pipe");
1837
1838 fd_intern (evpipe [0]);
1839 fd_intern (evpipe [1]);
1840 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1841 }
1842
1843 ev_io_start (EV_A_ &pipe_w);
1844 ev_unref (EV_A); /* watcher should not keep loop alive */
1845 }
1846}
1847
1848inline_speed void
1849evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1850{
1851 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1852
1853 if (expect_true (*flag))
1854 return;
1855
1856 *flag = 1;
1857
1858 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1859
1860 pipe_write_skipped = 1;
1861
1862 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1863
1864 if (pipe_write_wanted)
1865 {
1866 int old_errno;
1867
1868 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1869
1870 old_errno = errno; /* save errno because write will clobber it */
1871
1872#if EV_USE_EVENTFD
1873 if (evfd >= 0)
1874 {
1875 uint64_t counter = 1;
1876 write (evfd, &counter, sizeof (uint64_t));
1877 }
1878 else
1879#endif
1880 {
1881 /* win32 people keep sending patches that change this write() to send() */
1882 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1883 /* so when you think this write should be a send instead, please find out */
1884 /* where your send() is from - it's definitely not the microsoft send, and */
1885 /* tell me. thank you. */
1886 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1887 /* check the ev documentation on how to use this flag */
1888 write (evpipe [1], &(evpipe [1]), 1);
1889 }
1890
1891 errno = old_errno;
1892 }
1893}
1894
1895/* called whenever the libev signal pipe */
1896/* got some events (signal, async) */
1897static void
1898pipecb (EV_P_ ev_io *iow, int revents)
1899{
1900 int i;
1901
1902 if (revents & EV_READ)
1903 {
1904#if EV_USE_EVENTFD
1905 if (evfd >= 0)
1906 {
1907 uint64_t counter;
1908 read (evfd, &counter, sizeof (uint64_t));
1909 }
1910 else
1911#endif
1912 {
1913 char dummy;
1914 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1915 read (evpipe [0], &dummy, 1);
1916 }
1917 }
1918
1919 pipe_write_skipped = 0;
1920
1921 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1922
1923#if EV_SIGNAL_ENABLE
1924 if (sig_pending)
1925 {
1926 sig_pending = 0;
1927
1928 ECB_MEMORY_FENCE_RELEASE;
1929
1930 for (i = EV_NSIG - 1; i--; )
1931 if (expect_false (signals [i].pending))
1932 ev_feed_signal_event (EV_A_ i + 1);
1933 }
1934#endif
1935
1936#if EV_ASYNC_ENABLE
1937 if (async_pending)
1938 {
1939 async_pending = 0;
1940
1941 ECB_MEMORY_FENCE_RELEASE;
1942
1943 for (i = asynccnt; i--; )
1944 if (asyncs [i]->sent)
1945 {
1946 asyncs [i]->sent = 0;
1947 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1948 }
1949 }
1950#endif
1951}
1952
1953/*****************************************************************************/
1954
1955void
1956ev_feed_signal (int signum) EV_THROW
1957{
1958#if EV_MULTIPLICITY
1959 EV_P = signals [signum - 1].loop;
1960
1961 if (!EV_A)
1962 return;
1963#endif
1964
1965 if (!ev_active (&pipe_w))
1966 return;
1967
1968 signals [signum - 1].pending = 1;
1969 evpipe_write (EV_A_ &sig_pending);
1970}
1971
1972static void
1973ev_sighandler (int signum)
1974{
1975#ifdef _WIN32
1976 signal (signum, ev_sighandler);
1977#endif
1978
1979 ev_feed_signal (signum);
1980}
1981
1982void noinline
1983ev_feed_signal_event (EV_P_ int signum) EV_THROW
1984{
1985 WL w;
1986
1987 if (expect_false (signum <= 0 || signum > EV_NSIG))
1988 return;
1989
1990 --signum;
1991
1992#if EV_MULTIPLICITY
1993 /* it is permissible to try to feed a signal to the wrong loop */
1994 /* or, likely more useful, feeding a signal nobody is waiting for */
1995
1996 if (expect_false (signals [signum].loop != EV_A))
1997 return;
1998#endif
1999
2000 signals [signum].pending = 0;
2001
2002 for (w = signals [signum].head; w; w = w->next)
2003 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2004}
2005
2006#if EV_USE_SIGNALFD
2007static void
2008sigfdcb (EV_P_ ev_io *iow, int revents)
2009{
2010 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2011
2012 for (;;)
2013 {
2014 ssize_t res = read (sigfd, si, sizeof (si));
2015
2016 /* not ISO-C, as res might be -1, but works with SuS */
2017 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2018 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2019
2020 if (res < (ssize_t)sizeof (si))
2021 break;
2022 }
2023}
2024#endif
2025
2026#endif
2027
2028/*****************************************************************************/
2029
2030#if EV_CHILD_ENABLE
805static WL childs [EV_PID_HASHSIZE]; 2031static WL childs [EV_PID_HASHSIZE];
806 2032
807#ifndef _WIN32
808
809static ev_signal childev; 2033static ev_signal childev;
810 2034
811void inline_speed 2035#ifndef WIFCONTINUED
2036# define WIFCONTINUED(status) 0
2037#endif
2038
2039/* handle a single child status event */
2040inline_speed void
812child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2041child_reap (EV_P_ int chain, int pid, int status)
813{ 2042{
814 ev_child *w; 2043 ev_child *w;
2044 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
815 2045
816 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2046 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2047 {
817 if (w->pid == pid || !w->pid) 2048 if ((w->pid == pid || !w->pid)
2049 && (!traced || (w->flags & 1)))
818 { 2050 {
819 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2051 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
820 w->rpid = pid; 2052 w->rpid = pid;
821 w->rstatus = status; 2053 w->rstatus = status;
822 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2054 ev_feed_event (EV_A_ (W)w, EV_CHILD);
823 } 2055 }
2056 }
824} 2057}
825 2058
826#ifndef WCONTINUED 2059#ifndef WCONTINUED
827# define WCONTINUED 0 2060# define WCONTINUED 0
828#endif 2061#endif
829 2062
2063/* called on sigchld etc., calls waitpid */
830static void 2064static void
831childcb (EV_P_ ev_signal *sw, int revents) 2065childcb (EV_P_ ev_signal *sw, int revents)
832{ 2066{
833 int pid, status; 2067 int pid, status;
834 2068
… …
837 if (!WCONTINUED 2071 if (!WCONTINUED
838 || errno != EINVAL 2072 || errno != EINVAL
839 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2073 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
840 return; 2074 return;
841 2075
842 /* make sure we are called again until all childs have been reaped */ 2076 /* make sure we are called again until all children have been reaped */
843 /* we need to do it this way so that the callback gets called before we continue */ 2077 /* we need to do it this way so that the callback gets called before we continue */
844 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2078 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
845 2079
846 child_reap (EV_A_ sw, pid, pid, status); 2080 child_reap (EV_A_ pid, pid, status);
847 if (EV_PID_HASHSIZE > 1) 2081 if ((EV_PID_HASHSIZE) > 1)
848 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2082 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
849} 2083}
850 2084
851#endif 2085#endif
852 2086
853/*****************************************************************************/ 2087/*****************************************************************************/
854 2088
2089#if EV_USE_IOCP
2090# include "ev_iocp.c"
2091#endif
855#if EV_USE_PORT 2092#if EV_USE_PORT
856# include "ev_port.c" 2093# include "ev_port.c"
857#endif 2094#endif
858#if EV_USE_KQUEUE 2095#if EV_USE_KQUEUE
859# include "ev_kqueue.c" 2096# include "ev_kqueue.c"
… …
866#endif 2103#endif
867#if EV_USE_SELECT 2104#if EV_USE_SELECT
868# include "ev_select.c" 2105# include "ev_select.c"
869#endif 2106#endif
870 2107
871int 2108int ecb_cold
872ev_version_major (void) 2109ev_version_major (void) EV_THROW
873{ 2110{
874 return EV_VERSION_MAJOR; 2111 return EV_VERSION_MAJOR;
875} 2112}
876 2113
877int 2114int ecb_cold
878ev_version_minor (void) 2115ev_version_minor (void) EV_THROW
879{ 2116{
880 return EV_VERSION_MINOR; 2117 return EV_VERSION_MINOR;
881} 2118}
882 2119
883/* return true if we are running with elevated privileges and should ignore env variables */ 2120/* return true if we are running with elevated privileges and should ignore env variables */
884int inline_size 2121int inline_size ecb_cold
885enable_secure (void) 2122enable_secure (void)
886{ 2123{
887#ifdef _WIN32 2124#ifdef _WIN32
888 return 0; 2125 return 0;
889#else 2126#else
890 return getuid () != geteuid () 2127 return getuid () != geteuid ()
891 || getgid () != getegid (); 2128 || getgid () != getegid ();
892#endif 2129#endif
893} 2130}
894 2131
895unsigned int 2132unsigned int ecb_cold
896ev_supported_backends (void) 2133ev_supported_backends (void) EV_THROW
897{ 2134{
898 unsigned int flags = 0; 2135 unsigned int flags = 0;
899 2136
900 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2137 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
901 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2138 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
904 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2141 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
905 2142
906 return flags; 2143 return flags;
907} 2144}
908 2145
909unsigned int 2146unsigned int ecb_cold
910ev_recommended_backends (void) 2147ev_recommended_backends (void) EV_THROW
911{ 2148{
912 unsigned int flags = ev_supported_backends (); 2149 unsigned int flags = ev_supported_backends ();
913 2150
914#ifndef __NetBSD__ 2151#ifndef __NetBSD__
915 /* kqueue is borked on everything but netbsd apparently */ 2152 /* kqueue is borked on everything but netbsd apparently */
916 /* it usually doesn't work correctly on anything but sockets and pipes */ 2153 /* it usually doesn't work correctly on anything but sockets and pipes */
917 flags &= ~EVBACKEND_KQUEUE; 2154 flags &= ~EVBACKEND_KQUEUE;
918#endif 2155#endif
919#ifdef __APPLE__ 2156#ifdef __APPLE__
920 // flags &= ~EVBACKEND_KQUEUE; for documentation 2157 /* only select works correctly on that "unix-certified" platform */
921 flags &= ~EVBACKEND_POLL; 2158 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2159 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2160#endif
2161#ifdef __FreeBSD__
2162 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
922#endif 2163#endif
923 2164
924 return flags; 2165 return flags;
925} 2166}
926 2167
2168unsigned int ecb_cold
2169ev_embeddable_backends (void) EV_THROW
2170{
2171 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2172
2173 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2174 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2175 flags &= ~EVBACKEND_EPOLL;
2176
2177 return flags;
2178}
2179
927unsigned int 2180unsigned int
928ev_embeddable_backends (void) 2181ev_backend (EV_P) EV_THROW
929{ 2182{
930 return EVBACKEND_EPOLL 2183 return backend;
931 | EVBACKEND_KQUEUE
932 | EVBACKEND_PORT;
933} 2184}
934 2185
2186#if EV_FEATURE_API
935unsigned int 2187unsigned int
936ev_backend (EV_P) 2188ev_iteration (EV_P) EV_THROW
937{ 2189{
938 return backend; 2190 return loop_count;
939} 2191}
940 2192
941unsigned int 2193unsigned int
942ev_loop_count (EV_P) 2194ev_depth (EV_P) EV_THROW
943{ 2195{
944 return loop_count; 2196 return loop_depth;
945} 2197}
946 2198
2199void
2200ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2201{
2202 io_blocktime = interval;
2203}
2204
2205void
2206ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2207{
2208 timeout_blocktime = interval;
2209}
2210
2211void
2212ev_set_userdata (EV_P_ void *data) EV_THROW
2213{
2214 userdata = data;
2215}
2216
2217void *
2218ev_userdata (EV_P) EV_THROW
2219{
2220 return userdata;
2221}
2222
2223void
2224ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2225{
2226 invoke_cb = invoke_pending_cb;
2227}
2228
2229void
2230ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2231{
2232 release_cb = release;
2233 acquire_cb = acquire;
2234}
2235#endif
2236
2237/* initialise a loop structure, must be zero-initialised */
947static void noinline 2238static void noinline ecb_cold
948loop_init (EV_P_ unsigned int flags) 2239loop_init (EV_P_ unsigned int flags) EV_THROW
949{ 2240{
950 if (!backend) 2241 if (!backend)
951 { 2242 {
2243 origflags = flags;
2244
2245#if EV_USE_REALTIME
2246 if (!have_realtime)
2247 {
2248 struct timespec ts;
2249
2250 if (!clock_gettime (CLOCK_REALTIME, &ts))
2251 have_realtime = 1;
2252 }
2253#endif
2254
952#if EV_USE_MONOTONIC 2255#if EV_USE_MONOTONIC
2256 if (!have_monotonic)
953 { 2257 {
954 struct timespec ts; 2258 struct timespec ts;
2259
955 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2260 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
956 have_monotonic = 1; 2261 have_monotonic = 1;
957 } 2262 }
958#endif 2263#endif
959
960 ev_rt_now = ev_time ();
961 mn_now = get_clock ();
962 now_floor = mn_now;
963 rtmn_diff = ev_rt_now - mn_now;
964 2264
965 /* pid check not overridable via env */ 2265 /* pid check not overridable via env */
966#ifndef _WIN32 2266#ifndef _WIN32
967 if (flags & EVFLAG_FORKCHECK) 2267 if (flags & EVFLAG_FORKCHECK)
968 curpid = getpid (); 2268 curpid = getpid ();
… …
971 if (!(flags & EVFLAG_NOENV) 2271 if (!(flags & EVFLAG_NOENV)
972 && !enable_secure () 2272 && !enable_secure ()
973 && getenv ("LIBEV_FLAGS")) 2273 && getenv ("LIBEV_FLAGS"))
974 flags = atoi (getenv ("LIBEV_FLAGS")); 2274 flags = atoi (getenv ("LIBEV_FLAGS"));
975 2275
976 if (!(flags & 0x0000ffffUL)) 2276 ev_rt_now = ev_time ();
2277 mn_now = get_clock ();
2278 now_floor = mn_now;
2279 rtmn_diff = ev_rt_now - mn_now;
2280#if EV_FEATURE_API
2281 invoke_cb = ev_invoke_pending;
2282#endif
2283
2284 io_blocktime = 0.;
2285 timeout_blocktime = 0.;
2286 backend = 0;
2287 backend_fd = -1;
2288 sig_pending = 0;
2289#if EV_ASYNC_ENABLE
2290 async_pending = 0;
2291#endif
2292 pipe_write_skipped = 0;
2293 pipe_write_wanted = 0;
2294#if EV_USE_INOTIFY
2295 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2296#endif
2297#if EV_USE_SIGNALFD
2298 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2299#endif
2300
2301 if (!(flags & EVBACKEND_MASK))
977 flags |= ev_recommended_backends (); 2302 flags |= ev_recommended_backends ();
978 2303
979 backend = 0;
980 backend_fd = -1;
981#if EV_USE_INOTIFY 2304#if EV_USE_IOCP
982 fs_fd = -2; 2305 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
983#endif 2306#endif
984
985#if EV_USE_PORT 2307#if EV_USE_PORT
986 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2308 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
987#endif 2309#endif
988#if EV_USE_KQUEUE 2310#if EV_USE_KQUEUE
989 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2311 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
996#endif 2318#endif
997#if EV_USE_SELECT 2319#if EV_USE_SELECT
998 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2320 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
999#endif 2321#endif
1000 2322
2323 ev_prepare_init (&pending_w, pendingcb);
2324
2325#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1001 ev_init (&sigev, sigcb); 2326 ev_init (&pipe_w, pipecb);
1002 ev_set_priority (&sigev, EV_MAXPRI); 2327 ev_set_priority (&pipe_w, EV_MAXPRI);
2328#endif
1003 } 2329 }
1004} 2330}
1005 2331
1006static void noinline 2332/* free up a loop structure */
2333void ecb_cold
1007loop_destroy (EV_P) 2334ev_loop_destroy (EV_P)
1008{ 2335{
1009 int i; 2336 int i;
2337
2338#if EV_MULTIPLICITY
2339 /* mimic free (0) */
2340 if (!EV_A)
2341 return;
2342#endif
2343
2344#if EV_CLEANUP_ENABLE
2345 /* queue cleanup watchers (and execute them) */
2346 if (expect_false (cleanupcnt))
2347 {
2348 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2349 EV_INVOKE_PENDING;
2350 }
2351#endif
2352
2353#if EV_CHILD_ENABLE
2354 if (ev_is_active (&childev))
2355 {
2356 ev_ref (EV_A); /* child watcher */
2357 ev_signal_stop (EV_A_ &childev);
2358 }
2359#endif
2360
2361 if (ev_is_active (&pipe_w))
2362 {
2363 /*ev_ref (EV_A);*/
2364 /*ev_io_stop (EV_A_ &pipe_w);*/
2365
2366#if EV_USE_EVENTFD
2367 if (evfd >= 0)
2368 close (evfd);
2369#endif
2370
2371 if (evpipe [0] >= 0)
2372 {
2373 EV_WIN32_CLOSE_FD (evpipe [0]);
2374 EV_WIN32_CLOSE_FD (evpipe [1]);
2375 }
2376 }
2377
2378#if EV_USE_SIGNALFD
2379 if (ev_is_active (&sigfd_w))
2380 close (sigfd);
2381#endif
1010 2382
1011#if EV_USE_INOTIFY 2383#if EV_USE_INOTIFY
1012 if (fs_fd >= 0) 2384 if (fs_fd >= 0)
1013 close (fs_fd); 2385 close (fs_fd);
1014#endif 2386#endif
1015 2387
1016 if (backend_fd >= 0) 2388 if (backend_fd >= 0)
1017 close (backend_fd); 2389 close (backend_fd);
1018 2390
2391#if EV_USE_IOCP
2392 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2393#endif
1019#if EV_USE_PORT 2394#if EV_USE_PORT
1020 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2395 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1021#endif 2396#endif
1022#if EV_USE_KQUEUE 2397#if EV_USE_KQUEUE
1023 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2398 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1038#if EV_IDLE_ENABLE 2413#if EV_IDLE_ENABLE
1039 array_free (idle, [i]); 2414 array_free (idle, [i]);
1040#endif 2415#endif
1041 } 2416 }
1042 2417
1043 ev_free (anfds); anfdmax = 0; 2418 ev_free (anfds); anfds = 0; anfdmax = 0;
1044 2419
1045 /* have to use the microsoft-never-gets-it-right macro */ 2420 /* have to use the microsoft-never-gets-it-right macro */
2421 array_free (rfeed, EMPTY);
1046 array_free (fdchange, EMPTY); 2422 array_free (fdchange, EMPTY);
1047 array_free (timer, EMPTY); 2423 array_free (timer, EMPTY);
1048#if EV_PERIODIC_ENABLE 2424#if EV_PERIODIC_ENABLE
1049 array_free (periodic, EMPTY); 2425 array_free (periodic, EMPTY);
1050#endif 2426#endif
1051#if EV_FORK_ENABLE 2427#if EV_FORK_ENABLE
1052 array_free (fork, EMPTY); 2428 array_free (fork, EMPTY);
1053#endif 2429#endif
2430#if EV_CLEANUP_ENABLE
2431 array_free (cleanup, EMPTY);
2432#endif
1054 array_free (prepare, EMPTY); 2433 array_free (prepare, EMPTY);
1055 array_free (check, EMPTY); 2434 array_free (check, EMPTY);
2435#if EV_ASYNC_ENABLE
2436 array_free (async, EMPTY);
2437#endif
1056 2438
1057 backend = 0; 2439 backend = 0;
1058}
1059 2440
2441#if EV_MULTIPLICITY
2442 if (ev_is_default_loop (EV_A))
2443#endif
2444 ev_default_loop_ptr = 0;
2445#if EV_MULTIPLICITY
2446 else
2447 ev_free (EV_A);
2448#endif
2449}
2450
2451#if EV_USE_INOTIFY
1060void inline_size infy_fork (EV_P); 2452inline_size void infy_fork (EV_P);
2453#endif
1061 2454
1062void inline_size 2455inline_size void
1063loop_fork (EV_P) 2456loop_fork (EV_P)
1064{ 2457{
1065#if EV_USE_PORT 2458#if EV_USE_PORT
1066 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2459 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1067#endif 2460#endif
… …
1073#endif 2466#endif
1074#if EV_USE_INOTIFY 2467#if EV_USE_INOTIFY
1075 infy_fork (EV_A); 2468 infy_fork (EV_A);
1076#endif 2469#endif
1077 2470
1078 if (ev_is_active (&sigev)) 2471 if (ev_is_active (&pipe_w))
1079 { 2472 {
1080 /* default loop */ 2473 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1081 2474
1082 ev_ref (EV_A); 2475 ev_ref (EV_A);
1083 ev_io_stop (EV_A_ &sigev); 2476 ev_io_stop (EV_A_ &pipe_w);
1084 close (sigpipe [0]);
1085 close (sigpipe [1]);
1086 2477
1087 while (pipe (sigpipe)) 2478#if EV_USE_EVENTFD
1088 syserr ("(libev) error creating pipe"); 2479 if (evfd >= 0)
2480 close (evfd);
2481#endif
1089 2482
2483 if (evpipe [0] >= 0)
2484 {
2485 EV_WIN32_CLOSE_FD (evpipe [0]);
2486 EV_WIN32_CLOSE_FD (evpipe [1]);
2487 }
2488
2489#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1090 siginit (EV_A); 2490 evpipe_init (EV_A);
2491 /* now iterate over everything, in case we missed something */
2492 pipecb (EV_A_ &pipe_w, EV_READ);
2493#endif
1091 } 2494 }
1092 2495
1093 postfork = 0; 2496 postfork = 0;
1094} 2497}
1095 2498
1096#if EV_MULTIPLICITY 2499#if EV_MULTIPLICITY
2500
1097struct ev_loop * 2501struct ev_loop * ecb_cold
1098ev_loop_new (unsigned int flags) 2502ev_loop_new (unsigned int flags) EV_THROW
1099{ 2503{
1100 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2504 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1101 2505
1102 memset (loop, 0, sizeof (struct ev_loop)); 2506 memset (EV_A, 0, sizeof (struct ev_loop));
1103
1104 loop_init (EV_A_ flags); 2507 loop_init (EV_A_ flags);
1105 2508
1106 if (ev_backend (EV_A)) 2509 if (ev_backend (EV_A))
1107 return loop; 2510 return EV_A;
1108 2511
2512 ev_free (EV_A);
1109 return 0; 2513 return 0;
1110} 2514}
1111 2515
1112void 2516#endif /* multiplicity */
1113ev_loop_destroy (EV_P)
1114{
1115 loop_destroy (EV_A);
1116 ev_free (loop);
1117}
1118 2517
1119void 2518#if EV_VERIFY
1120ev_loop_fork (EV_P) 2519static void noinline ecb_cold
2520verify_watcher (EV_P_ W w)
1121{ 2521{
1122 postfork = 1; 2522 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1123}
1124 2523
2524 if (w->pending)
2525 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2526}
2527
2528static void noinline ecb_cold
2529verify_heap (EV_P_ ANHE *heap, int N)
2530{
2531 int i;
2532
2533 for (i = HEAP0; i < N + HEAP0; ++i)
2534 {
2535 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2536 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2537 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2538
2539 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2540 }
2541}
2542
2543static void noinline ecb_cold
2544array_verify (EV_P_ W *ws, int cnt)
2545{
2546 while (cnt--)
2547 {
2548 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2549 verify_watcher (EV_A_ ws [cnt]);
2550 }
2551}
2552#endif
2553
2554#if EV_FEATURE_API
2555void ecb_cold
2556ev_verify (EV_P) EV_THROW
2557{
2558#if EV_VERIFY
2559 int i, j;
2560 WL w, w2;
2561
2562 assert (activecnt >= -1);
2563
2564 assert (fdchangemax >= fdchangecnt);
2565 for (i = 0; i < fdchangecnt; ++i)
2566 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2567
2568 assert (anfdmax >= 0);
2569 for (i = j = 0; i < anfdmax; ++i)
2570 for (w = w2 = anfds [i].head; w; w = w->next)
2571 {
2572 verify_watcher (EV_A_ (W)w);
2573
2574 if (++j & 1)
2575 w2 = w2->next;
2576
2577 assert (("libev: io watcher list contains a loop", w != w2));
2578 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2579 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2580 }
2581
2582 assert (timermax >= timercnt);
2583 verify_heap (EV_A_ timers, timercnt);
2584
2585#if EV_PERIODIC_ENABLE
2586 assert (periodicmax >= periodiccnt);
2587 verify_heap (EV_A_ periodics, periodiccnt);
2588#endif
2589
2590 for (i = NUMPRI; i--; )
2591 {
2592 assert (pendingmax [i] >= pendingcnt [i]);
2593#if EV_IDLE_ENABLE
2594 assert (idleall >= 0);
2595 assert (idlemax [i] >= idlecnt [i]);
2596 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2597#endif
2598 }
2599
2600#if EV_FORK_ENABLE
2601 assert (forkmax >= forkcnt);
2602 array_verify (EV_A_ (W *)forks, forkcnt);
2603#endif
2604
2605#if EV_CLEANUP_ENABLE
2606 assert (cleanupmax >= cleanupcnt);
2607 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2608#endif
2609
2610#if EV_ASYNC_ENABLE
2611 assert (asyncmax >= asynccnt);
2612 array_verify (EV_A_ (W *)asyncs, asynccnt);
2613#endif
2614
2615#if EV_PREPARE_ENABLE
2616 assert (preparemax >= preparecnt);
2617 array_verify (EV_A_ (W *)prepares, preparecnt);
2618#endif
2619
2620#if EV_CHECK_ENABLE
2621 assert (checkmax >= checkcnt);
2622 array_verify (EV_A_ (W *)checks, checkcnt);
2623#endif
2624
2625# if 0
2626#if EV_CHILD_ENABLE
2627 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2628 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2629#endif
2630# endif
2631#endif
2632}
1125#endif 2633#endif
1126 2634
1127#if EV_MULTIPLICITY 2635#if EV_MULTIPLICITY
1128struct ev_loop * 2636struct ev_loop * ecb_cold
1129ev_default_loop_init (unsigned int flags)
1130#else 2637#else
1131int 2638int
2639#endif
1132ev_default_loop (unsigned int flags) 2640ev_default_loop (unsigned int flags) EV_THROW
1133#endif
1134{ 2641{
1135 if (sigpipe [0] == sigpipe [1])
1136 if (pipe (sigpipe))
1137 return 0;
1138
1139 if (!ev_default_loop_ptr) 2642 if (!ev_default_loop_ptr)
1140 { 2643 {
1141#if EV_MULTIPLICITY 2644#if EV_MULTIPLICITY
1142 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2645 EV_P = ev_default_loop_ptr = &default_loop_struct;
1143#else 2646#else
1144 ev_default_loop_ptr = 1; 2647 ev_default_loop_ptr = 1;
1145#endif 2648#endif
1146 2649
1147 loop_init (EV_A_ flags); 2650 loop_init (EV_A_ flags);
1148 2651
1149 if (ev_backend (EV_A)) 2652 if (ev_backend (EV_A))
1150 { 2653 {
1151 siginit (EV_A); 2654#if EV_CHILD_ENABLE
1152
1153#ifndef _WIN32
1154 ev_signal_init (&childev, childcb, SIGCHLD); 2655 ev_signal_init (&childev, childcb, SIGCHLD);
1155 ev_set_priority (&childev, EV_MAXPRI); 2656 ev_set_priority (&childev, EV_MAXPRI);
1156 ev_signal_start (EV_A_ &childev); 2657 ev_signal_start (EV_A_ &childev);
1157 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2658 ev_unref (EV_A); /* child watcher should not keep loop alive */
1158#endif 2659#endif
… …
1163 2664
1164 return ev_default_loop_ptr; 2665 return ev_default_loop_ptr;
1165} 2666}
1166 2667
1167void 2668void
1168ev_default_destroy (void) 2669ev_loop_fork (EV_P) EV_THROW
1169{ 2670{
1170#if EV_MULTIPLICITY 2671 postfork = 1; /* must be in line with ev_default_fork */
1171 struct ev_loop *loop = ev_default_loop_ptr;
1172#endif
1173
1174#ifndef _WIN32
1175 ev_ref (EV_A); /* child watcher */
1176 ev_signal_stop (EV_A_ &childev);
1177#endif
1178
1179 ev_ref (EV_A); /* signal watcher */
1180 ev_io_stop (EV_A_ &sigev);
1181
1182 close (sigpipe [0]); sigpipe [0] = 0;
1183 close (sigpipe [1]); sigpipe [1] = 0;
1184
1185 loop_destroy (EV_A);
1186}
1187
1188void
1189ev_default_fork (void)
1190{
1191#if EV_MULTIPLICITY
1192 struct ev_loop *loop = ev_default_loop_ptr;
1193#endif
1194
1195 if (backend)
1196 postfork = 1;
1197} 2672}
1198 2673
1199/*****************************************************************************/ 2674/*****************************************************************************/
1200 2675
1201void 2676void
1202ev_invoke (EV_P_ void *w, int revents) 2677ev_invoke (EV_P_ void *w, int revents)
1203{ 2678{
1204 EV_CB_INVOKE ((W)w, revents); 2679 EV_CB_INVOKE ((W)w, revents);
1205} 2680}
1206 2681
1207void inline_speed 2682unsigned int
1208call_pending (EV_P) 2683ev_pending_count (EV_P) EV_THROW
1209{ 2684{
1210 int pri; 2685 int pri;
2686 unsigned int count = 0;
1211 2687
1212 for (pri = NUMPRI; pri--; ) 2688 for (pri = NUMPRI; pri--; )
2689 count += pendingcnt [pri];
2690
2691 return count;
2692}
2693
2694void noinline
2695ev_invoke_pending (EV_P)
2696{
2697 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
1213 while (pendingcnt [pri]) 2698 while (pendingcnt [pendingpri])
1214 { 2699 {
1215 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2700 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1216 2701
1217 if (expect_true (p->w))
1218 {
1219 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1220
1221 p->w->pending = 0; 2702 p->w->pending = 0;
1222 EV_CB_INVOKE (p->w, p->events); 2703 EV_CB_INVOKE (p->w, p->events);
1223 } 2704 EV_FREQUENT_CHECK;
1224 } 2705 }
1225} 2706}
1226 2707
1227void inline_size
1228timers_reify (EV_P)
1229{
1230 while (timercnt && ((WT)timers [0])->at <= mn_now)
1231 {
1232 ev_timer *w = (ev_timer *)timers [0];
1233
1234 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1235
1236 /* first reschedule or stop timer */
1237 if (w->repeat)
1238 {
1239 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1240
1241 ((WT)w)->at += w->repeat;
1242 if (((WT)w)->at < mn_now)
1243 ((WT)w)->at = mn_now;
1244
1245 downheap (timers, timercnt, 0);
1246 }
1247 else
1248 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1249
1250 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1251 }
1252}
1253
1254#if EV_PERIODIC_ENABLE
1255void inline_size
1256periodics_reify (EV_P)
1257{
1258 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1259 {
1260 ev_periodic *w = (ev_periodic *)periodics [0];
1261
1262 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1263
1264 /* first reschedule or stop timer */
1265 if (w->reschedule_cb)
1266 {
1267 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1268 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1269 downheap (periodics, periodiccnt, 0);
1270 }
1271 else if (w->interval)
1272 {
1273 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1274 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1275 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1276 downheap (periodics, periodiccnt, 0);
1277 }
1278 else
1279 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1280
1281 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1282 }
1283}
1284
1285static void noinline
1286periodics_reschedule (EV_P)
1287{
1288 int i;
1289
1290 /* adjust periodics after time jump */
1291 for (i = 0; i < periodiccnt; ++i)
1292 {
1293 ev_periodic *w = (ev_periodic *)periodics [i];
1294
1295 if (w->reschedule_cb)
1296 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1297 else if (w->interval)
1298 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1299 }
1300
1301 /* now rebuild the heap */
1302 for (i = periodiccnt >> 1; i--; )
1303 downheap (periodics, periodiccnt, i);
1304}
1305#endif
1306
1307#if EV_IDLE_ENABLE 2708#if EV_IDLE_ENABLE
1308void inline_size 2709/* make idle watchers pending. this handles the "call-idle */
2710/* only when higher priorities are idle" logic */
2711inline_size void
1309idle_reify (EV_P) 2712idle_reify (EV_P)
1310{ 2713{
1311 if (expect_false (idleall)) 2714 if (expect_false (idleall))
1312 { 2715 {
1313 int pri; 2716 int pri;
… …
1325 } 2728 }
1326 } 2729 }
1327} 2730}
1328#endif 2731#endif
1329 2732
1330void inline_speed 2733/* make timers pending */
2734inline_size void
2735timers_reify (EV_P)
2736{
2737 EV_FREQUENT_CHECK;
2738
2739 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2740 {
2741 do
2742 {
2743 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2744
2745 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2746
2747 /* first reschedule or stop timer */
2748 if (w->repeat)
2749 {
2750 ev_at (w) += w->repeat;
2751 if (ev_at (w) < mn_now)
2752 ev_at (w) = mn_now;
2753
2754 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2755
2756 ANHE_at_cache (timers [HEAP0]);
2757 downheap (timers, timercnt, HEAP0);
2758 }
2759 else
2760 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2761
2762 EV_FREQUENT_CHECK;
2763 feed_reverse (EV_A_ (W)w);
2764 }
2765 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2766
2767 feed_reverse_done (EV_A_ EV_TIMER);
2768 }
2769}
2770
2771#if EV_PERIODIC_ENABLE
2772
2773static void noinline
2774periodic_recalc (EV_P_ ev_periodic *w)
2775{
2776 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2777 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2778
2779 /* the above almost always errs on the low side */
2780 while (at <= ev_rt_now)
2781 {
2782 ev_tstamp nat = at + w->interval;
2783
2784 /* when resolution fails us, we use ev_rt_now */
2785 if (expect_false (nat == at))
2786 {
2787 at = ev_rt_now;
2788 break;
2789 }
2790
2791 at = nat;
2792 }
2793
2794 ev_at (w) = at;
2795}
2796
2797/* make periodics pending */
2798inline_size void
2799periodics_reify (EV_P)
2800{
2801 EV_FREQUENT_CHECK;
2802
2803 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2804 {
2805 int feed_count = 0;
2806
2807 do
2808 {
2809 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2810
2811 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2812
2813 /* first reschedule or stop timer */
2814 if (w->reschedule_cb)
2815 {
2816 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2817
2818 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2819
2820 ANHE_at_cache (periodics [HEAP0]);
2821 downheap (periodics, periodiccnt, HEAP0);
2822 }
2823 else if (w->interval)
2824 {
2825 periodic_recalc (EV_A_ w);
2826 ANHE_at_cache (periodics [HEAP0]);
2827 downheap (periodics, periodiccnt, HEAP0);
2828 }
2829 else
2830 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2831
2832 EV_FREQUENT_CHECK;
2833 feed_reverse (EV_A_ (W)w);
2834 }
2835 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2836
2837 feed_reverse_done (EV_A_ EV_PERIODIC);
2838 }
2839}
2840
2841/* simply recalculate all periodics */
2842/* TODO: maybe ensure that at least one event happens when jumping forward? */
2843static void noinline ecb_cold
2844periodics_reschedule (EV_P)
2845{
2846 int i;
2847
2848 /* adjust periodics after time jump */
2849 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2850 {
2851 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2852
2853 if (w->reschedule_cb)
2854 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2855 else if (w->interval)
2856 periodic_recalc (EV_A_ w);
2857
2858 ANHE_at_cache (periodics [i]);
2859 }
2860
2861 reheap (periodics, periodiccnt);
2862}
2863#endif
2864
2865/* adjust all timers by a given offset */
2866static void noinline ecb_cold
2867timers_reschedule (EV_P_ ev_tstamp adjust)
2868{
2869 int i;
2870
2871 for (i = 0; i < timercnt; ++i)
2872 {
2873 ANHE *he = timers + i + HEAP0;
2874 ANHE_w (*he)->at += adjust;
2875 ANHE_at_cache (*he);
2876 }
2877}
2878
2879/* fetch new monotonic and realtime times from the kernel */
2880/* also detect if there was a timejump, and act accordingly */
2881inline_speed void
1331time_update (EV_P_ ev_tstamp max_block) 2882time_update (EV_P_ ev_tstamp max_block)
1332{ 2883{
1333 int i;
1334
1335#if EV_USE_MONOTONIC 2884#if EV_USE_MONOTONIC
1336 if (expect_true (have_monotonic)) 2885 if (expect_true (have_monotonic))
1337 { 2886 {
2887 int i;
1338 ev_tstamp odiff = rtmn_diff; 2888 ev_tstamp odiff = rtmn_diff;
1339 2889
1340 mn_now = get_clock (); 2890 mn_now = get_clock ();
1341 2891
1342 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2892 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1358 * doesn't hurt either as we only do this on time-jumps or 2908 * doesn't hurt either as we only do this on time-jumps or
1359 * in the unlikely event of having been preempted here. 2909 * in the unlikely event of having been preempted here.
1360 */ 2910 */
1361 for (i = 4; --i; ) 2911 for (i = 4; --i; )
1362 { 2912 {
2913 ev_tstamp diff;
1363 rtmn_diff = ev_rt_now - mn_now; 2914 rtmn_diff = ev_rt_now - mn_now;
1364 2915
1365 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2916 diff = odiff - rtmn_diff;
2917
2918 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1366 return; /* all is well */ 2919 return; /* all is well */
1367 2920
1368 ev_rt_now = ev_time (); 2921 ev_rt_now = ev_time ();
1369 mn_now = get_clock (); 2922 mn_now = get_clock ();
1370 now_floor = mn_now; 2923 now_floor = mn_now;
1371 } 2924 }
1372 2925
2926 /* no timer adjustment, as the monotonic clock doesn't jump */
2927 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1373# if EV_PERIODIC_ENABLE 2928# if EV_PERIODIC_ENABLE
1374 periodics_reschedule (EV_A); 2929 periodics_reschedule (EV_A);
1375# endif 2930# endif
1376 /* no timer adjustment, as the monotonic clock doesn't jump */
1377 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1378 } 2931 }
1379 else 2932 else
1380#endif 2933#endif
1381 { 2934 {
1382 ev_rt_now = ev_time (); 2935 ev_rt_now = ev_time ();
1383 2936
1384 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2937 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1385 { 2938 {
2939 /* adjust timers. this is easy, as the offset is the same for all of them */
2940 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1386#if EV_PERIODIC_ENABLE 2941#if EV_PERIODIC_ENABLE
1387 periodics_reschedule (EV_A); 2942 periodics_reschedule (EV_A);
1388#endif 2943#endif
1389 /* adjust timers. this is easy, as the offset is the same for all of them */
1390 for (i = 0; i < timercnt; ++i)
1391 ((WT)timers [i])->at += ev_rt_now - mn_now;
1392 } 2944 }
1393 2945
1394 mn_now = ev_rt_now; 2946 mn_now = ev_rt_now;
1395 } 2947 }
1396} 2948}
1397 2949
1398void 2950int
1399ev_ref (EV_P)
1400{
1401 ++activecnt;
1402}
1403
1404void
1405ev_unref (EV_P)
1406{
1407 --activecnt;
1408}
1409
1410static int loop_done;
1411
1412void
1413ev_loop (EV_P_ int flags) 2951ev_run (EV_P_ int flags)
1414{ 2952{
1415 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2953#if EV_FEATURE_API
1416 ? EVUNLOOP_ONE 2954 ++loop_depth;
1417 : EVUNLOOP_CANCEL; 2955#endif
1418 2956
2957 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2958
2959 loop_done = EVBREAK_CANCEL;
2960
1419 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2961 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1420 2962
1421 do 2963 do
1422 { 2964 {
2965#if EV_VERIFY >= 2
2966 ev_verify (EV_A);
2967#endif
2968
1423#ifndef _WIN32 2969#ifndef _WIN32
1424 if (expect_false (curpid)) /* penalise the forking check even more */ 2970 if (expect_false (curpid)) /* penalise the forking check even more */
1425 if (expect_false (getpid () != curpid)) 2971 if (expect_false (getpid () != curpid))
1426 { 2972 {
1427 curpid = getpid (); 2973 curpid = getpid ();
… …
1433 /* we might have forked, so queue fork handlers */ 2979 /* we might have forked, so queue fork handlers */
1434 if (expect_false (postfork)) 2980 if (expect_false (postfork))
1435 if (forkcnt) 2981 if (forkcnt)
1436 { 2982 {
1437 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2983 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1438 call_pending (EV_A); 2984 EV_INVOKE_PENDING;
1439 } 2985 }
1440#endif 2986#endif
1441 2987
2988#if EV_PREPARE_ENABLE
1442 /* queue prepare watchers (and execute them) */ 2989 /* queue prepare watchers (and execute them) */
1443 if (expect_false (preparecnt)) 2990 if (expect_false (preparecnt))
1444 { 2991 {
1445 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2992 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1446 call_pending (EV_A); 2993 EV_INVOKE_PENDING;
1447 } 2994 }
2995#endif
1448 2996
1449 if (expect_false (!activecnt)) 2997 if (expect_false (loop_done))
1450 break; 2998 break;
1451 2999
1452 /* we might have forked, so reify kernel state if necessary */ 3000 /* we might have forked, so reify kernel state if necessary */
1453 if (expect_false (postfork)) 3001 if (expect_false (postfork))
1454 loop_fork (EV_A); 3002 loop_fork (EV_A);
… …
1456 /* update fd-related kernel structures */ 3004 /* update fd-related kernel structures */
1457 fd_reify (EV_A); 3005 fd_reify (EV_A);
1458 3006
1459 /* calculate blocking time */ 3007 /* calculate blocking time */
1460 { 3008 {
1461 ev_tstamp block; 3009 ev_tstamp waittime = 0.;
3010 ev_tstamp sleeptime = 0.;
1462 3011
1463 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 3012 /* remember old timestamp for io_blocktime calculation */
1464 block = 0.; /* do not block at all */ 3013 ev_tstamp prev_mn_now = mn_now;
1465 else 3014
3015 /* update time to cancel out callback processing overhead */
3016 time_update (EV_A_ 1e100);
3017
3018 /* from now on, we want a pipe-wake-up */
3019 pipe_write_wanted = 1;
3020
3021 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3022
3023 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1466 { 3024 {
1467 /* update time to cancel out callback processing overhead */
1468 time_update (EV_A_ 1e100);
1469
1470 block = MAX_BLOCKTIME; 3025 waittime = MAX_BLOCKTIME;
1471 3026
1472 if (timercnt) 3027 if (timercnt)
1473 { 3028 {
1474 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3029 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1475 if (block > to) block = to; 3030 if (waittime > to) waittime = to;
1476 } 3031 }
1477 3032
1478#if EV_PERIODIC_ENABLE 3033#if EV_PERIODIC_ENABLE
1479 if (periodiccnt) 3034 if (periodiccnt)
1480 { 3035 {
1481 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3036 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1482 if (block > to) block = to; 3037 if (waittime > to) waittime = to;
1483 } 3038 }
1484#endif 3039#endif
1485 3040
3041 /* don't let timeouts decrease the waittime below timeout_blocktime */
3042 if (expect_false (waittime < timeout_blocktime))
3043 waittime = timeout_blocktime;
3044
3045 /* at this point, we NEED to wait, so we have to ensure */
3046 /* to pass a minimum nonzero value to the backend */
3047 if (expect_false (waittime < backend_mintime))
3048 waittime = backend_mintime;
3049
3050 /* extra check because io_blocktime is commonly 0 */
1486 if (expect_false (block < 0.)) block = 0.; 3051 if (expect_false (io_blocktime))
3052 {
3053 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3054
3055 if (sleeptime > waittime - backend_mintime)
3056 sleeptime = waittime - backend_mintime;
3057
3058 if (expect_true (sleeptime > 0.))
3059 {
3060 ev_sleep (sleeptime);
3061 waittime -= sleeptime;
3062 }
3063 }
1487 } 3064 }
1488 3065
3066#if EV_FEATURE_API
1489 ++loop_count; 3067 ++loop_count;
3068#endif
3069 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1490 backend_poll (EV_A_ block); 3070 backend_poll (EV_A_ waittime);
3071 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3072
3073 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3074
3075 if (pipe_write_skipped)
3076 {
3077 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3078 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3079 }
3080
1491 3081
1492 /* update ev_rt_now, do magic */ 3082 /* update ev_rt_now, do magic */
1493 time_update (EV_A_ block); 3083 time_update (EV_A_ waittime + sleeptime);
1494 } 3084 }
1495 3085
1496 /* queue pending timers and reschedule them */ 3086 /* queue pending timers and reschedule them */
1497 timers_reify (EV_A); /* relative timers called last */ 3087 timers_reify (EV_A); /* relative timers called last */
1498#if EV_PERIODIC_ENABLE 3088#if EV_PERIODIC_ENABLE
… …
1502#if EV_IDLE_ENABLE 3092#if EV_IDLE_ENABLE
1503 /* queue idle watchers unless other events are pending */ 3093 /* queue idle watchers unless other events are pending */
1504 idle_reify (EV_A); 3094 idle_reify (EV_A);
1505#endif 3095#endif
1506 3096
3097#if EV_CHECK_ENABLE
1507 /* queue check watchers, to be executed first */ 3098 /* queue check watchers, to be executed first */
1508 if (expect_false (checkcnt)) 3099 if (expect_false (checkcnt))
1509 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3100 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3101#endif
1510 3102
1511 call_pending (EV_A); 3103 EV_INVOKE_PENDING;
1512
1513 } 3104 }
1514 while (expect_true (activecnt && !loop_done)); 3105 while (expect_true (
3106 activecnt
3107 && !loop_done
3108 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3109 ));
1515 3110
1516 if (loop_done == EVUNLOOP_ONE) 3111 if (loop_done == EVBREAK_ONE)
1517 loop_done = EVUNLOOP_CANCEL; 3112 loop_done = EVBREAK_CANCEL;
3113
3114#if EV_FEATURE_API
3115 --loop_depth;
3116#endif
3117
3118 return activecnt;
1518} 3119}
1519 3120
1520void 3121void
1521ev_unloop (EV_P_ int how) 3122ev_break (EV_P_ int how) EV_THROW
1522{ 3123{
1523 loop_done = how; 3124 loop_done = how;
1524} 3125}
1525 3126
3127void
3128ev_ref (EV_P) EV_THROW
3129{
3130 ++activecnt;
3131}
3132
3133void
3134ev_unref (EV_P) EV_THROW
3135{
3136 --activecnt;
3137}
3138
3139void
3140ev_now_update (EV_P) EV_THROW
3141{
3142 time_update (EV_A_ 1e100);
3143}
3144
3145void
3146ev_suspend (EV_P) EV_THROW
3147{
3148 ev_now_update (EV_A);
3149}
3150
3151void
3152ev_resume (EV_P) EV_THROW
3153{
3154 ev_tstamp mn_prev = mn_now;
3155
3156 ev_now_update (EV_A);
3157 timers_reschedule (EV_A_ mn_now - mn_prev);
3158#if EV_PERIODIC_ENABLE
3159 /* TODO: really do this? */
3160 periodics_reschedule (EV_A);
3161#endif
3162}
3163
1526/*****************************************************************************/ 3164/*****************************************************************************/
3165/* singly-linked list management, used when the expected list length is short */
1527 3166
1528void inline_size 3167inline_size void
1529wlist_add (WL *head, WL elem) 3168wlist_add (WL *head, WL elem)
1530{ 3169{
1531 elem->next = *head; 3170 elem->next = *head;
1532 *head = elem; 3171 *head = elem;
1533} 3172}
1534 3173
1535void inline_size 3174inline_size void
1536wlist_del (WL *head, WL elem) 3175wlist_del (WL *head, WL elem)
1537{ 3176{
1538 while (*head) 3177 while (*head)
1539 { 3178 {
1540 if (*head == elem) 3179 if (expect_true (*head == elem))
1541 { 3180 {
1542 *head = elem->next; 3181 *head = elem->next;
1543 return; 3182 break;
1544 } 3183 }
1545 3184
1546 head = &(*head)->next; 3185 head = &(*head)->next;
1547 } 3186 }
1548} 3187}
1549 3188
1550void inline_speed 3189/* internal, faster, version of ev_clear_pending */
3190inline_speed void
1551clear_pending (EV_P_ W w) 3191clear_pending (EV_P_ W w)
1552{ 3192{
1553 if (w->pending) 3193 if (w->pending)
1554 { 3194 {
1555 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3195 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1556 w->pending = 0; 3196 w->pending = 0;
1557 } 3197 }
1558} 3198}
1559 3199
1560int 3200int
1561ev_clear_pending (EV_P_ void *w) 3201ev_clear_pending (EV_P_ void *w) EV_THROW
1562{ 3202{
1563 W w_ = (W)w; 3203 W w_ = (W)w;
1564 int pending = w_->pending; 3204 int pending = w_->pending;
1565 3205
1566 if (expect_true (pending)) 3206 if (expect_true (pending))
1567 { 3207 {
1568 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3208 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3209 p->w = (W)&pending_w;
1569 w_->pending = 0; 3210 w_->pending = 0;
1570 p->w = 0;
1571 return p->events; 3211 return p->events;
1572 } 3212 }
1573 else 3213 else
1574 return 0; 3214 return 0;
1575} 3215}
1576 3216
1577void inline_size 3217inline_size void
1578pri_adjust (EV_P_ W w) 3218pri_adjust (EV_P_ W w)
1579{ 3219{
1580 int pri = w->priority; 3220 int pri = ev_priority (w);
1581 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3221 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1582 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3222 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1583 w->priority = pri; 3223 ev_set_priority (w, pri);
1584} 3224}
1585 3225
1586void inline_speed 3226inline_speed void
1587ev_start (EV_P_ W w, int active) 3227ev_start (EV_P_ W w, int active)
1588{ 3228{
1589 pri_adjust (EV_A_ w); 3229 pri_adjust (EV_A_ w);
1590 w->active = active; 3230 w->active = active;
1591 ev_ref (EV_A); 3231 ev_ref (EV_A);
1592} 3232}
1593 3233
1594void inline_size 3234inline_size void
1595ev_stop (EV_P_ W w) 3235ev_stop (EV_P_ W w)
1596{ 3236{
1597 ev_unref (EV_A); 3237 ev_unref (EV_A);
1598 w->active = 0; 3238 w->active = 0;
1599} 3239}
1600 3240
1601/*****************************************************************************/ 3241/*****************************************************************************/
1602 3242
1603void noinline 3243void noinline
1604ev_io_start (EV_P_ ev_io *w) 3244ev_io_start (EV_P_ ev_io *w) EV_THROW
1605{ 3245{
1606 int fd = w->fd; 3246 int fd = w->fd;
1607 3247
1608 if (expect_false (ev_is_active (w))) 3248 if (expect_false (ev_is_active (w)))
1609 return; 3249 return;
1610 3250
1611 assert (("ev_io_start called with negative fd", fd >= 0)); 3251 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3252 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3253
3254 EV_FREQUENT_CHECK;
1612 3255
1613 ev_start (EV_A_ (W)w, 1); 3256 ev_start (EV_A_ (W)w, 1);
1614 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3257 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1615 wlist_add (&anfds[fd].head, (WL)w); 3258 wlist_add (&anfds[fd].head, (WL)w);
1616 3259
3260 /* common bug, apparently */
3261 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3262
1617 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3263 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1618 w->events &= ~EV_IOFDSET; 3264 w->events &= ~EV__IOFDSET;
3265
3266 EV_FREQUENT_CHECK;
1619} 3267}
1620 3268
1621void noinline 3269void noinline
1622ev_io_stop (EV_P_ ev_io *w) 3270ev_io_stop (EV_P_ ev_io *w) EV_THROW
1623{ 3271{
1624 clear_pending (EV_A_ (W)w); 3272 clear_pending (EV_A_ (W)w);
1625 if (expect_false (!ev_is_active (w))) 3273 if (expect_false (!ev_is_active (w)))
1626 return; 3274 return;
1627 3275
1628 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3276 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3277
3278 EV_FREQUENT_CHECK;
1629 3279
1630 wlist_del (&anfds[w->fd].head, (WL)w); 3280 wlist_del (&anfds[w->fd].head, (WL)w);
1631 ev_stop (EV_A_ (W)w); 3281 ev_stop (EV_A_ (W)w);
1632 3282
1633 fd_change (EV_A_ w->fd, 1); 3283 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3284
3285 EV_FREQUENT_CHECK;
1634} 3286}
1635 3287
1636void noinline 3288void noinline
1637ev_timer_start (EV_P_ ev_timer *w) 3289ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1638{ 3290{
1639 if (expect_false (ev_is_active (w))) 3291 if (expect_false (ev_is_active (w)))
1640 return; 3292 return;
1641 3293
1642 ((WT)w)->at += mn_now; 3294 ev_at (w) += mn_now;
1643 3295
1644 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3296 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1645 3297
3298 EV_FREQUENT_CHECK;
3299
3300 ++timercnt;
1646 ev_start (EV_A_ (W)w, ++timercnt); 3301 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1647 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3302 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1648 timers [timercnt - 1] = (WT)w; 3303 ANHE_w (timers [ev_active (w)]) = (WT)w;
1649 upheap (timers, timercnt - 1); 3304 ANHE_at_cache (timers [ev_active (w)]);
3305 upheap (timers, ev_active (w));
1650 3306
3307 EV_FREQUENT_CHECK;
3308
1651 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3309 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1652} 3310}
1653 3311
1654void noinline 3312void noinline
1655ev_timer_stop (EV_P_ ev_timer *w) 3313ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1656{ 3314{
1657 clear_pending (EV_A_ (W)w); 3315 clear_pending (EV_A_ (W)w);
1658 if (expect_false (!ev_is_active (w))) 3316 if (expect_false (!ev_is_active (w)))
1659 return; 3317 return;
1660 3318
1661 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3319 EV_FREQUENT_CHECK;
1662 3320
1663 { 3321 {
1664 int active = ((W)w)->active; 3322 int active = ev_active (w);
1665 3323
3324 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3325
3326 --timercnt;
3327
1666 if (expect_true (--active < --timercnt)) 3328 if (expect_true (active < timercnt + HEAP0))
1667 { 3329 {
1668 timers [active] = timers [timercnt]; 3330 timers [active] = timers [timercnt + HEAP0];
1669 adjustheap (timers, timercnt, active); 3331 adjustheap (timers, timercnt, active);
1670 } 3332 }
1671 } 3333 }
1672 3334
1673 ((WT)w)->at -= mn_now; 3335 ev_at (w) -= mn_now;
1674 3336
1675 ev_stop (EV_A_ (W)w); 3337 ev_stop (EV_A_ (W)w);
3338
3339 EV_FREQUENT_CHECK;
1676} 3340}
1677 3341
1678void noinline 3342void noinline
1679ev_timer_again (EV_P_ ev_timer *w) 3343ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1680{ 3344{
3345 EV_FREQUENT_CHECK;
3346
3347 clear_pending (EV_A_ (W)w);
3348
1681 if (ev_is_active (w)) 3349 if (ev_is_active (w))
1682 { 3350 {
1683 if (w->repeat) 3351 if (w->repeat)
1684 { 3352 {
1685 ((WT)w)->at = mn_now + w->repeat; 3353 ev_at (w) = mn_now + w->repeat;
3354 ANHE_at_cache (timers [ev_active (w)]);
1686 adjustheap (timers, timercnt, ((W)w)->active - 1); 3355 adjustheap (timers, timercnt, ev_active (w));
1687 } 3356 }
1688 else 3357 else
1689 ev_timer_stop (EV_A_ w); 3358 ev_timer_stop (EV_A_ w);
1690 } 3359 }
1691 else if (w->repeat) 3360 else if (w->repeat)
1692 { 3361 {
1693 w->at = w->repeat; 3362 ev_at (w) = w->repeat;
1694 ev_timer_start (EV_A_ w); 3363 ev_timer_start (EV_A_ w);
1695 } 3364 }
3365
3366 EV_FREQUENT_CHECK;
3367}
3368
3369ev_tstamp
3370ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3371{
3372 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1696} 3373}
1697 3374
1698#if EV_PERIODIC_ENABLE 3375#if EV_PERIODIC_ENABLE
1699void noinline 3376void noinline
1700ev_periodic_start (EV_P_ ev_periodic *w) 3377ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1701{ 3378{
1702 if (expect_false (ev_is_active (w))) 3379 if (expect_false (ev_is_active (w)))
1703 return; 3380 return;
1704 3381
1705 if (w->reschedule_cb) 3382 if (w->reschedule_cb)
1706 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3383 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1707 else if (w->interval) 3384 else if (w->interval)
1708 { 3385 {
1709 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3386 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1710 /* this formula differs from the one in periodic_reify because we do not always round up */ 3387 periodic_recalc (EV_A_ w);
1711 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1712 } 3388 }
1713 else 3389 else
1714 ((WT)w)->at = w->offset; 3390 ev_at (w) = w->offset;
1715 3391
3392 EV_FREQUENT_CHECK;
3393
3394 ++periodiccnt;
1716 ev_start (EV_A_ (W)w, ++periodiccnt); 3395 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1717 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 3396 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1718 periodics [periodiccnt - 1] = (WT)w; 3397 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1719 upheap (periodics, periodiccnt - 1); 3398 ANHE_at_cache (periodics [ev_active (w)]);
3399 upheap (periodics, ev_active (w));
1720 3400
3401 EV_FREQUENT_CHECK;
3402
1721 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3403 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1722} 3404}
1723 3405
1724void noinline 3406void noinline
1725ev_periodic_stop (EV_P_ ev_periodic *w) 3407ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1726{ 3408{
1727 clear_pending (EV_A_ (W)w); 3409 clear_pending (EV_A_ (W)w);
1728 if (expect_false (!ev_is_active (w))) 3410 if (expect_false (!ev_is_active (w)))
1729 return; 3411 return;
1730 3412
1731 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3413 EV_FREQUENT_CHECK;
1732 3414
1733 { 3415 {
1734 int active = ((W)w)->active; 3416 int active = ev_active (w);
1735 3417
3418 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3419
3420 --periodiccnt;
3421
1736 if (expect_true (--active < --periodiccnt)) 3422 if (expect_true (active < periodiccnt + HEAP0))
1737 { 3423 {
1738 periodics [active] = periodics [periodiccnt]; 3424 periodics [active] = periodics [periodiccnt + HEAP0];
1739 adjustheap (periodics, periodiccnt, active); 3425 adjustheap (periodics, periodiccnt, active);
1740 } 3426 }
1741 } 3427 }
1742 3428
1743 ev_stop (EV_A_ (W)w); 3429 ev_stop (EV_A_ (W)w);
3430
3431 EV_FREQUENT_CHECK;
1744} 3432}
1745 3433
1746void noinline 3434void noinline
1747ev_periodic_again (EV_P_ ev_periodic *w) 3435ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1748{ 3436{
1749 /* TODO: use adjustheap and recalculation */ 3437 /* TODO: use adjustheap and recalculation */
1750 ev_periodic_stop (EV_A_ w); 3438 ev_periodic_stop (EV_A_ w);
1751 ev_periodic_start (EV_A_ w); 3439 ev_periodic_start (EV_A_ w);
1752} 3440}
… …
1754 3442
1755#ifndef SA_RESTART 3443#ifndef SA_RESTART
1756# define SA_RESTART 0 3444# define SA_RESTART 0
1757#endif 3445#endif
1758 3446
3447#if EV_SIGNAL_ENABLE
3448
1759void noinline 3449void noinline
1760ev_signal_start (EV_P_ ev_signal *w) 3450ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1761{ 3451{
1762#if EV_MULTIPLICITY
1763 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1764#endif
1765 if (expect_false (ev_is_active (w))) 3452 if (expect_false (ev_is_active (w)))
1766 return; 3453 return;
1767 3454
1768 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3455 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1769 3456
3457#if EV_MULTIPLICITY
3458 assert (("libev: a signal must not be attached to two different loops",
3459 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3460
3461 signals [w->signum - 1].loop = EV_A;
3462#endif
3463
3464 EV_FREQUENT_CHECK;
3465
3466#if EV_USE_SIGNALFD
3467 if (sigfd == -2)
1770 { 3468 {
1771#ifndef _WIN32 3469 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1772 sigset_t full, prev; 3470 if (sigfd < 0 && errno == EINVAL)
1773 sigfillset (&full); 3471 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1774 sigprocmask (SIG_SETMASK, &full, &prev);
1775#endif
1776 3472
1777 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3473 if (sigfd >= 0)
3474 {
3475 fd_intern (sigfd); /* doing it twice will not hurt */
1778 3476
1779#ifndef _WIN32 3477 sigemptyset (&sigfd_set);
1780 sigprocmask (SIG_SETMASK, &prev, 0); 3478
1781#endif 3479 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3480 ev_set_priority (&sigfd_w, EV_MAXPRI);
3481 ev_io_start (EV_A_ &sigfd_w);
3482 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3483 }
1782 } 3484 }
3485
3486 if (sigfd >= 0)
3487 {
3488 /* TODO: check .head */
3489 sigaddset (&sigfd_set, w->signum);
3490 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3491
3492 signalfd (sigfd, &sigfd_set, 0);
3493 }
3494#endif
1783 3495
1784 ev_start (EV_A_ (W)w, 1); 3496 ev_start (EV_A_ (W)w, 1);
1785 wlist_add (&signals [w->signum - 1].head, (WL)w); 3497 wlist_add (&signals [w->signum - 1].head, (WL)w);
1786 3498
1787 if (!((WL)w)->next) 3499 if (!((WL)w)->next)
3500# if EV_USE_SIGNALFD
3501 if (sigfd < 0) /*TODO*/
3502# endif
1788 { 3503 {
1789#if _WIN32 3504# ifdef _WIN32
3505 evpipe_init (EV_A);
3506
1790 signal (w->signum, sighandler); 3507 signal (w->signum, ev_sighandler);
1791#else 3508# else
1792 struct sigaction sa; 3509 struct sigaction sa;
3510
3511 evpipe_init (EV_A);
3512
1793 sa.sa_handler = sighandler; 3513 sa.sa_handler = ev_sighandler;
1794 sigfillset (&sa.sa_mask); 3514 sigfillset (&sa.sa_mask);
1795 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3515 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1796 sigaction (w->signum, &sa, 0); 3516 sigaction (w->signum, &sa, 0);
3517
3518 if (origflags & EVFLAG_NOSIGMASK)
3519 {
3520 sigemptyset (&sa.sa_mask);
3521 sigaddset (&sa.sa_mask, w->signum);
3522 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3523 }
1797#endif 3524#endif
1798 } 3525 }
3526
3527 EV_FREQUENT_CHECK;
1799} 3528}
1800 3529
1801void noinline 3530void noinline
1802ev_signal_stop (EV_P_ ev_signal *w) 3531ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1803{ 3532{
1804 clear_pending (EV_A_ (W)w); 3533 clear_pending (EV_A_ (W)w);
1805 if (expect_false (!ev_is_active (w))) 3534 if (expect_false (!ev_is_active (w)))
1806 return; 3535 return;
1807 3536
3537 EV_FREQUENT_CHECK;
3538
1808 wlist_del (&signals [w->signum - 1].head, (WL)w); 3539 wlist_del (&signals [w->signum - 1].head, (WL)w);
1809 ev_stop (EV_A_ (W)w); 3540 ev_stop (EV_A_ (W)w);
1810 3541
1811 if (!signals [w->signum - 1].head) 3542 if (!signals [w->signum - 1].head)
3543 {
3544#if EV_MULTIPLICITY
3545 signals [w->signum - 1].loop = 0; /* unattach from signal */
3546#endif
3547#if EV_USE_SIGNALFD
3548 if (sigfd >= 0)
3549 {
3550 sigset_t ss;
3551
3552 sigemptyset (&ss);
3553 sigaddset (&ss, w->signum);
3554 sigdelset (&sigfd_set, w->signum);
3555
3556 signalfd (sigfd, &sigfd_set, 0);
3557 sigprocmask (SIG_UNBLOCK, &ss, 0);
3558 }
3559 else
3560#endif
1812 signal (w->signum, SIG_DFL); 3561 signal (w->signum, SIG_DFL);
3562 }
3563
3564 EV_FREQUENT_CHECK;
1813} 3565}
3566
3567#endif
3568
3569#if EV_CHILD_ENABLE
1814 3570
1815void 3571void
1816ev_child_start (EV_P_ ev_child *w) 3572ev_child_start (EV_P_ ev_child *w) EV_THROW
1817{ 3573{
1818#if EV_MULTIPLICITY 3574#if EV_MULTIPLICITY
1819 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3575 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1820#endif 3576#endif
1821 if (expect_false (ev_is_active (w))) 3577 if (expect_false (ev_is_active (w)))
1822 return; 3578 return;
1823 3579
3580 EV_FREQUENT_CHECK;
3581
1824 ev_start (EV_A_ (W)w, 1); 3582 ev_start (EV_A_ (W)w, 1);
1825 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3583 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3584
3585 EV_FREQUENT_CHECK;
1826} 3586}
1827 3587
1828void 3588void
1829ev_child_stop (EV_P_ ev_child *w) 3589ev_child_stop (EV_P_ ev_child *w) EV_THROW
1830{ 3590{
1831 clear_pending (EV_A_ (W)w); 3591 clear_pending (EV_A_ (W)w);
1832 if (expect_false (!ev_is_active (w))) 3592 if (expect_false (!ev_is_active (w)))
1833 return; 3593 return;
1834 3594
3595 EV_FREQUENT_CHECK;
3596
1835 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3597 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1836 ev_stop (EV_A_ (W)w); 3598 ev_stop (EV_A_ (W)w);
3599
3600 EV_FREQUENT_CHECK;
1837} 3601}
3602
3603#endif
1838 3604
1839#if EV_STAT_ENABLE 3605#if EV_STAT_ENABLE
1840 3606
1841# ifdef _WIN32 3607# ifdef _WIN32
1842# undef lstat 3608# undef lstat
1843# define lstat(a,b) _stati64 (a,b) 3609# define lstat(a,b) _stati64 (a,b)
1844# endif 3610# endif
1845 3611
1846#define DEF_STAT_INTERVAL 5.0074891 3612#define DEF_STAT_INTERVAL 5.0074891
3613#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1847#define MIN_STAT_INTERVAL 0.1074891 3614#define MIN_STAT_INTERVAL 0.1074891
1848 3615
1849static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3616static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1850 3617
1851#if EV_USE_INOTIFY 3618#if EV_USE_INOTIFY
1852# define EV_INOTIFY_BUFSIZE 8192 3619
3620/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3621# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1853 3622
1854static void noinline 3623static void noinline
1855infy_add (EV_P_ ev_stat *w) 3624infy_add (EV_P_ ev_stat *w)
1856{ 3625{
1857 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); 3626 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);
1858 3627
1859 if (w->wd < 0) 3628 if (w->wd >= 0)
3629 {
3630 struct statfs sfs;
3631
3632 /* now local changes will be tracked by inotify, but remote changes won't */
3633 /* unless the filesystem is known to be local, we therefore still poll */
3634 /* also do poll on <2.6.25, but with normal frequency */
3635
3636 if (!fs_2625)
3637 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3638 else if (!statfs (w->path, &sfs)
3639 && (sfs.f_type == 0x1373 /* devfs */
3640 || sfs.f_type == 0xEF53 /* ext2/3 */
3641 || sfs.f_type == 0x3153464a /* jfs */
3642 || sfs.f_type == 0x52654973 /* reiser3 */
3643 || sfs.f_type == 0x01021994 /* tempfs */
3644 || sfs.f_type == 0x58465342 /* xfs */))
3645 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3646 else
3647 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1860 { 3648 }
1861 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3649 else
3650 {
3651 /* can't use inotify, continue to stat */
3652 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1862 3653
1863 /* monitor some parent directory for speedup hints */ 3654 /* if path is not there, monitor some parent directory for speedup hints */
3655 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3656 /* but an efficiency issue only */
1864 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3657 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1865 { 3658 {
1866 char path [4096]; 3659 char path [4096];
1867 strcpy (path, w->path); 3660 strcpy (path, w->path);
1868 3661
… …
1871 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3664 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1872 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3665 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1873 3666
1874 char *pend = strrchr (path, '/'); 3667 char *pend = strrchr (path, '/');
1875 3668
1876 if (!pend) 3669 if (!pend || pend == path)
1877 break; /* whoops, no '/', complain to your admin */ 3670 break;
1878 3671
1879 *pend = 0; 3672 *pend = 0;
1880 w->wd = inotify_add_watch (fs_fd, path, mask); 3673 w->wd = inotify_add_watch (fs_fd, path, mask);
1881 } 3674 }
1882 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3675 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1883 } 3676 }
1884 } 3677 }
1885 else
1886 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1887 3678
1888 if (w->wd >= 0) 3679 if (w->wd >= 0)
1889 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3680 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3681
3682 /* now re-arm timer, if required */
3683 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3684 ev_timer_again (EV_A_ &w->timer);
3685 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1890} 3686}
1891 3687
1892static void noinline 3688static void noinline
1893infy_del (EV_P_ ev_stat *w) 3689infy_del (EV_P_ ev_stat *w)
1894{ 3690{
… …
1897 3693
1898 if (wd < 0) 3694 if (wd < 0)
1899 return; 3695 return;
1900 3696
1901 w->wd = -2; 3697 w->wd = -2;
1902 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3698 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1903 wlist_del (&fs_hash [slot].head, (WL)w); 3699 wlist_del (&fs_hash [slot].head, (WL)w);
1904 3700
1905 /* remove this watcher, if others are watching it, they will rearm */ 3701 /* remove this watcher, if others are watching it, they will rearm */
1906 inotify_rm_watch (fs_fd, wd); 3702 inotify_rm_watch (fs_fd, wd);
1907} 3703}
1908 3704
1909static void noinline 3705static void noinline
1910infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3706infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1911{ 3707{
1912 if (slot < 0) 3708 if (slot < 0)
1913 /* overflow, need to check for all hahs slots */ 3709 /* overflow, need to check for all hash slots */
1914 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3710 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1915 infy_wd (EV_A_ slot, wd, ev); 3711 infy_wd (EV_A_ slot, wd, ev);
1916 else 3712 else
1917 { 3713 {
1918 WL w_; 3714 WL w_;
1919 3715
1920 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3716 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1921 { 3717 {
1922 ev_stat *w = (ev_stat *)w_; 3718 ev_stat *w = (ev_stat *)w_;
1923 w_ = w_->next; /* lets us remove this watcher and all before it */ 3719 w_ = w_->next; /* lets us remove this watcher and all before it */
1924 3720
1925 if (w->wd == wd || wd == -1) 3721 if (w->wd == wd || wd == -1)
1926 { 3722 {
1927 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3723 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1928 { 3724 {
3725 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1929 w->wd = -1; 3726 w->wd = -1;
1930 infy_add (EV_A_ w); /* re-add, no matter what */ 3727 infy_add (EV_A_ w); /* re-add, no matter what */
1931 } 3728 }
1932 3729
1933 stat_timer_cb (EV_A_ &w->timer, 0); 3730 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1938 3735
1939static void 3736static void
1940infy_cb (EV_P_ ev_io *w, int revents) 3737infy_cb (EV_P_ ev_io *w, int revents)
1941{ 3738{
1942 char buf [EV_INOTIFY_BUFSIZE]; 3739 char buf [EV_INOTIFY_BUFSIZE];
1943 struct inotify_event *ev = (struct inotify_event *)buf;
1944 int ofs; 3740 int ofs;
1945 int len = read (fs_fd, buf, sizeof (buf)); 3741 int len = read (fs_fd, buf, sizeof (buf));
1946 3742
1947 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3743 for (ofs = 0; ofs < len; )
3744 {
3745 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1948 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3746 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3747 ofs += sizeof (struct inotify_event) + ev->len;
3748 }
1949} 3749}
1950 3750
1951void inline_size 3751inline_size void ecb_cold
3752ev_check_2625 (EV_P)
3753{
3754 /* kernels < 2.6.25 are borked
3755 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3756 */
3757 if (ev_linux_version () < 0x020619)
3758 return;
3759
3760 fs_2625 = 1;
3761}
3762
3763inline_size int
3764infy_newfd (void)
3765{
3766#if defined IN_CLOEXEC && defined IN_NONBLOCK
3767 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3768 if (fd >= 0)
3769 return fd;
3770#endif
3771 return inotify_init ();
3772}
3773
3774inline_size void
1952infy_init (EV_P) 3775infy_init (EV_P)
1953{ 3776{
1954 if (fs_fd != -2) 3777 if (fs_fd != -2)
1955 return; 3778 return;
1956 3779
3780 fs_fd = -1;
3781
3782 ev_check_2625 (EV_A);
3783
1957 fs_fd = inotify_init (); 3784 fs_fd = infy_newfd ();
1958 3785
1959 if (fs_fd >= 0) 3786 if (fs_fd >= 0)
1960 { 3787 {
3788 fd_intern (fs_fd);
1961 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3789 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1962 ev_set_priority (&fs_w, EV_MAXPRI); 3790 ev_set_priority (&fs_w, EV_MAXPRI);
1963 ev_io_start (EV_A_ &fs_w); 3791 ev_io_start (EV_A_ &fs_w);
3792 ev_unref (EV_A);
1964 } 3793 }
1965} 3794}
1966 3795
1967void inline_size 3796inline_size void
1968infy_fork (EV_P) 3797infy_fork (EV_P)
1969{ 3798{
1970 int slot; 3799 int slot;
1971 3800
1972 if (fs_fd < 0) 3801 if (fs_fd < 0)
1973 return; 3802 return;
1974 3803
3804 ev_ref (EV_A);
3805 ev_io_stop (EV_A_ &fs_w);
1975 close (fs_fd); 3806 close (fs_fd);
1976 fs_fd = inotify_init (); 3807 fs_fd = infy_newfd ();
1977 3808
3809 if (fs_fd >= 0)
3810 {
3811 fd_intern (fs_fd);
3812 ev_io_set (&fs_w, fs_fd, EV_READ);
3813 ev_io_start (EV_A_ &fs_w);
3814 ev_unref (EV_A);
3815 }
3816
1978 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3817 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1979 { 3818 {
1980 WL w_ = fs_hash [slot].head; 3819 WL w_ = fs_hash [slot].head;
1981 fs_hash [slot].head = 0; 3820 fs_hash [slot].head = 0;
1982 3821
1983 while (w_) 3822 while (w_)
… …
1988 w->wd = -1; 3827 w->wd = -1;
1989 3828
1990 if (fs_fd >= 0) 3829 if (fs_fd >= 0)
1991 infy_add (EV_A_ w); /* re-add, no matter what */ 3830 infy_add (EV_A_ w); /* re-add, no matter what */
1992 else 3831 else
3832 {
3833 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3834 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1993 ev_timer_start (EV_A_ &w->timer); 3835 ev_timer_again (EV_A_ &w->timer);
3836 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3837 }
1994 } 3838 }
1995
1996 } 3839 }
1997} 3840}
1998 3841
3842#endif
3843
3844#ifdef _WIN32
3845# define EV_LSTAT(p,b) _stati64 (p, b)
3846#else
3847# define EV_LSTAT(p,b) lstat (p, b)
1999#endif 3848#endif
2000 3849
2001void 3850void
2002ev_stat_stat (EV_P_ ev_stat *w) 3851ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2003{ 3852{
2004 if (lstat (w->path, &w->attr) < 0) 3853 if (lstat (w->path, &w->attr) < 0)
2005 w->attr.st_nlink = 0; 3854 w->attr.st_nlink = 0;
2006 else if (!w->attr.st_nlink) 3855 else if (!w->attr.st_nlink)
2007 w->attr.st_nlink = 1; 3856 w->attr.st_nlink = 1;
… …
2010static void noinline 3859static void noinline
2011stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3860stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2012{ 3861{
2013 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3862 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2014 3863
2015 /* we copy this here each the time so that */ 3864 ev_statdata prev = w->attr;
2016 /* prev has the old value when the callback gets invoked */
2017 w->prev = w->attr;
2018 ev_stat_stat (EV_A_ w); 3865 ev_stat_stat (EV_A_ w);
2019 3866
2020 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3867 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2021 if ( 3868 if (
2022 w->prev.st_dev != w->attr.st_dev 3869 prev.st_dev != w->attr.st_dev
2023 || w->prev.st_ino != w->attr.st_ino 3870 || prev.st_ino != w->attr.st_ino
2024 || w->prev.st_mode != w->attr.st_mode 3871 || prev.st_mode != w->attr.st_mode
2025 || w->prev.st_nlink != w->attr.st_nlink 3872 || prev.st_nlink != w->attr.st_nlink
2026 || w->prev.st_uid != w->attr.st_uid 3873 || prev.st_uid != w->attr.st_uid
2027 || w->prev.st_gid != w->attr.st_gid 3874 || prev.st_gid != w->attr.st_gid
2028 || w->prev.st_rdev != w->attr.st_rdev 3875 || prev.st_rdev != w->attr.st_rdev
2029 || w->prev.st_size != w->attr.st_size 3876 || prev.st_size != w->attr.st_size
2030 || w->prev.st_atime != w->attr.st_atime 3877 || prev.st_atime != w->attr.st_atime
2031 || w->prev.st_mtime != w->attr.st_mtime 3878 || prev.st_mtime != w->attr.st_mtime
2032 || w->prev.st_ctime != w->attr.st_ctime 3879 || prev.st_ctime != w->attr.st_ctime
2033 ) { 3880 ) {
3881 /* we only update w->prev on actual differences */
3882 /* in case we test more often than invoke the callback, */
3883 /* to ensure that prev is always different to attr */
3884 w->prev = prev;
3885
2034 #if EV_USE_INOTIFY 3886 #if EV_USE_INOTIFY
3887 if (fs_fd >= 0)
3888 {
2035 infy_del (EV_A_ w); 3889 infy_del (EV_A_ w);
2036 infy_add (EV_A_ w); 3890 infy_add (EV_A_ w);
2037 ev_stat_stat (EV_A_ w); /* avoid race... */ 3891 ev_stat_stat (EV_A_ w); /* avoid race... */
3892 }
2038 #endif 3893 #endif
2039 3894
2040 ev_feed_event (EV_A_ w, EV_STAT); 3895 ev_feed_event (EV_A_ w, EV_STAT);
2041 } 3896 }
2042} 3897}
2043 3898
2044void 3899void
2045ev_stat_start (EV_P_ ev_stat *w) 3900ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2046{ 3901{
2047 if (expect_false (ev_is_active (w))) 3902 if (expect_false (ev_is_active (w)))
2048 return; 3903 return;
2049 3904
2050 /* since we use memcmp, we need to clear any padding data etc. */
2051 memset (&w->prev, 0, sizeof (ev_statdata));
2052 memset (&w->attr, 0, sizeof (ev_statdata));
2053
2054 ev_stat_stat (EV_A_ w); 3905 ev_stat_stat (EV_A_ w);
2055 3906
3907 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2056 if (w->interval < MIN_STAT_INTERVAL) 3908 w->interval = MIN_STAT_INTERVAL;
2057 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2058 3909
2059 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3910 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2060 ev_set_priority (&w->timer, ev_priority (w)); 3911 ev_set_priority (&w->timer, ev_priority (w));
2061 3912
2062#if EV_USE_INOTIFY 3913#if EV_USE_INOTIFY
2063 infy_init (EV_A); 3914 infy_init (EV_A);
2064 3915
2065 if (fs_fd >= 0) 3916 if (fs_fd >= 0)
2066 infy_add (EV_A_ w); 3917 infy_add (EV_A_ w);
2067 else 3918 else
2068#endif 3919#endif
3920 {
2069 ev_timer_start (EV_A_ &w->timer); 3921 ev_timer_again (EV_A_ &w->timer);
3922 ev_unref (EV_A);
3923 }
2070 3924
2071 ev_start (EV_A_ (W)w, 1); 3925 ev_start (EV_A_ (W)w, 1);
3926
3927 EV_FREQUENT_CHECK;
2072} 3928}
2073 3929
2074void 3930void
2075ev_stat_stop (EV_P_ ev_stat *w) 3931ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2076{ 3932{
2077 clear_pending (EV_A_ (W)w); 3933 clear_pending (EV_A_ (W)w);
2078 if (expect_false (!ev_is_active (w))) 3934 if (expect_false (!ev_is_active (w)))
2079 return; 3935 return;
2080 3936
3937 EV_FREQUENT_CHECK;
3938
2081#if EV_USE_INOTIFY 3939#if EV_USE_INOTIFY
2082 infy_del (EV_A_ w); 3940 infy_del (EV_A_ w);
2083#endif 3941#endif
3942
3943 if (ev_is_active (&w->timer))
3944 {
3945 ev_ref (EV_A);
2084 ev_timer_stop (EV_A_ &w->timer); 3946 ev_timer_stop (EV_A_ &w->timer);
3947 }
2085 3948
2086 ev_stop (EV_A_ (W)w); 3949 ev_stop (EV_A_ (W)w);
3950
3951 EV_FREQUENT_CHECK;
2087} 3952}
2088#endif 3953#endif
2089 3954
2090#if EV_IDLE_ENABLE 3955#if EV_IDLE_ENABLE
2091void 3956void
2092ev_idle_start (EV_P_ ev_idle *w) 3957ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2093{ 3958{
2094 if (expect_false (ev_is_active (w))) 3959 if (expect_false (ev_is_active (w)))
2095 return; 3960 return;
2096 3961
2097 pri_adjust (EV_A_ (W)w); 3962 pri_adjust (EV_A_ (W)w);
3963
3964 EV_FREQUENT_CHECK;
2098 3965
2099 { 3966 {
2100 int active = ++idlecnt [ABSPRI (w)]; 3967 int active = ++idlecnt [ABSPRI (w)];
2101 3968
2102 ++idleall; 3969 ++idleall;
2103 ev_start (EV_A_ (W)w, active); 3970 ev_start (EV_A_ (W)w, active);
2104 3971
2105 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3972 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2106 idles [ABSPRI (w)][active - 1] = w; 3973 idles [ABSPRI (w)][active - 1] = w;
2107 } 3974 }
3975
3976 EV_FREQUENT_CHECK;
2108} 3977}
2109 3978
2110void 3979void
2111ev_idle_stop (EV_P_ ev_idle *w) 3980ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2112{ 3981{
2113 clear_pending (EV_A_ (W)w); 3982 clear_pending (EV_A_ (W)w);
2114 if (expect_false (!ev_is_active (w))) 3983 if (expect_false (!ev_is_active (w)))
2115 return; 3984 return;
2116 3985
3986 EV_FREQUENT_CHECK;
3987
2117 { 3988 {
2118 int active = ((W)w)->active; 3989 int active = ev_active (w);
2119 3990
2120 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3991 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2121 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3992 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2122 3993
2123 ev_stop (EV_A_ (W)w); 3994 ev_stop (EV_A_ (W)w);
2124 --idleall; 3995 --idleall;
2125 } 3996 }
2126}
2127#endif
2128 3997
3998 EV_FREQUENT_CHECK;
3999}
4000#endif
4001
4002#if EV_PREPARE_ENABLE
2129void 4003void
2130ev_prepare_start (EV_P_ ev_prepare *w) 4004ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2131{ 4005{
2132 if (expect_false (ev_is_active (w))) 4006 if (expect_false (ev_is_active (w)))
2133 return; 4007 return;
4008
4009 EV_FREQUENT_CHECK;
2134 4010
2135 ev_start (EV_A_ (W)w, ++preparecnt); 4011 ev_start (EV_A_ (W)w, ++preparecnt);
2136 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4012 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2137 prepares [preparecnt - 1] = w; 4013 prepares [preparecnt - 1] = w;
4014
4015 EV_FREQUENT_CHECK;
2138} 4016}
2139 4017
2140void 4018void
2141ev_prepare_stop (EV_P_ ev_prepare *w) 4019ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2142{ 4020{
2143 clear_pending (EV_A_ (W)w); 4021 clear_pending (EV_A_ (W)w);
2144 if (expect_false (!ev_is_active (w))) 4022 if (expect_false (!ev_is_active (w)))
2145 return; 4023 return;
2146 4024
4025 EV_FREQUENT_CHECK;
4026
2147 { 4027 {
2148 int active = ((W)w)->active; 4028 int active = ev_active (w);
4029
2149 prepares [active - 1] = prepares [--preparecnt]; 4030 prepares [active - 1] = prepares [--preparecnt];
2150 ((W)prepares [active - 1])->active = active; 4031 ev_active (prepares [active - 1]) = active;
2151 } 4032 }
2152 4033
2153 ev_stop (EV_A_ (W)w); 4034 ev_stop (EV_A_ (W)w);
2154}
2155 4035
4036 EV_FREQUENT_CHECK;
4037}
4038#endif
4039
4040#if EV_CHECK_ENABLE
2156void 4041void
2157ev_check_start (EV_P_ ev_check *w) 4042ev_check_start (EV_P_ ev_check *w) EV_THROW
2158{ 4043{
2159 if (expect_false (ev_is_active (w))) 4044 if (expect_false (ev_is_active (w)))
2160 return; 4045 return;
4046
4047 EV_FREQUENT_CHECK;
2161 4048
2162 ev_start (EV_A_ (W)w, ++checkcnt); 4049 ev_start (EV_A_ (W)w, ++checkcnt);
2163 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4050 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2164 checks [checkcnt - 1] = w; 4051 checks [checkcnt - 1] = w;
4052
4053 EV_FREQUENT_CHECK;
2165} 4054}
2166 4055
2167void 4056void
2168ev_check_stop (EV_P_ ev_check *w) 4057ev_check_stop (EV_P_ ev_check *w) EV_THROW
2169{ 4058{
2170 clear_pending (EV_A_ (W)w); 4059 clear_pending (EV_A_ (W)w);
2171 if (expect_false (!ev_is_active (w))) 4060 if (expect_false (!ev_is_active (w)))
2172 return; 4061 return;
2173 4062
4063 EV_FREQUENT_CHECK;
4064
2174 { 4065 {
2175 int active = ((W)w)->active; 4066 int active = ev_active (w);
4067
2176 checks [active - 1] = checks [--checkcnt]; 4068 checks [active - 1] = checks [--checkcnt];
2177 ((W)checks [active - 1])->active = active; 4069 ev_active (checks [active - 1]) = active;
2178 } 4070 }
2179 4071
2180 ev_stop (EV_A_ (W)w); 4072 ev_stop (EV_A_ (W)w);
4073
4074 EV_FREQUENT_CHECK;
2181} 4075}
4076#endif
2182 4077
2183#if EV_EMBED_ENABLE 4078#if EV_EMBED_ENABLE
2184void noinline 4079void noinline
2185ev_embed_sweep (EV_P_ ev_embed *w) 4080ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2186{ 4081{
2187 ev_loop (w->other, EVLOOP_NONBLOCK); 4082 ev_run (w->other, EVRUN_NOWAIT);
2188} 4083}
2189 4084
2190static void 4085static void
2191embed_io_cb (EV_P_ ev_io *io, int revents) 4086embed_io_cb (EV_P_ ev_io *io, int revents)
2192{ 4087{
2193 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4088 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2194 4089
2195 if (ev_cb (w)) 4090 if (ev_cb (w))
2196 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4091 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2197 else 4092 else
2198 ev_embed_sweep (loop, w); 4093 ev_run (w->other, EVRUN_NOWAIT);
2199} 4094}
2200 4095
2201static void 4096static void
2202embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4097embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2203{ 4098{
2204 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4099 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2205 4100
2206 fd_reify (w->other); 4101 {
4102 EV_P = w->other;
4103
4104 while (fdchangecnt)
4105 {
4106 fd_reify (EV_A);
4107 ev_run (EV_A_ EVRUN_NOWAIT);
4108 }
4109 }
2207} 4110}
4111
4112static void
4113embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4114{
4115 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4116
4117 ev_embed_stop (EV_A_ w);
4118
4119 {
4120 EV_P = w->other;
4121
4122 ev_loop_fork (EV_A);
4123 ev_run (EV_A_ EVRUN_NOWAIT);
4124 }
4125
4126 ev_embed_start (EV_A_ w);
4127}
4128
4129#if 0
4130static void
4131embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4132{
4133 ev_idle_stop (EV_A_ idle);
4134}
4135#endif
2208 4136
2209void 4137void
2210ev_embed_start (EV_P_ ev_embed *w) 4138ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2211{ 4139{
2212 if (expect_false (ev_is_active (w))) 4140 if (expect_false (ev_is_active (w)))
2213 return; 4141 return;
2214 4142
2215 { 4143 {
2216 struct ev_loop *loop = w->other; 4144 EV_P = w->other;
2217 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4145 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2218 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4146 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2219 } 4147 }
4148
4149 EV_FREQUENT_CHECK;
2220 4150
2221 ev_set_priority (&w->io, ev_priority (w)); 4151 ev_set_priority (&w->io, ev_priority (w));
2222 ev_io_start (EV_A_ &w->io); 4152 ev_io_start (EV_A_ &w->io);
2223 4153
2224 ev_prepare_init (&w->prepare, embed_prepare_cb); 4154 ev_prepare_init (&w->prepare, embed_prepare_cb);
2225 ev_set_priority (&w->prepare, EV_MINPRI); 4155 ev_set_priority (&w->prepare, EV_MINPRI);
2226 ev_prepare_start (EV_A_ &w->prepare); 4156 ev_prepare_start (EV_A_ &w->prepare);
2227 4157
4158 ev_fork_init (&w->fork, embed_fork_cb);
4159 ev_fork_start (EV_A_ &w->fork);
4160
4161 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4162
2228 ev_start (EV_A_ (W)w, 1); 4163 ev_start (EV_A_ (W)w, 1);
4164
4165 EV_FREQUENT_CHECK;
2229} 4166}
2230 4167
2231void 4168void
2232ev_embed_stop (EV_P_ ev_embed *w) 4169ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2233{ 4170{
2234 clear_pending (EV_A_ (W)w); 4171 clear_pending (EV_A_ (W)w);
2235 if (expect_false (!ev_is_active (w))) 4172 if (expect_false (!ev_is_active (w)))
2236 return; 4173 return;
2237 4174
4175 EV_FREQUENT_CHECK;
4176
2238 ev_io_stop (EV_A_ &w->io); 4177 ev_io_stop (EV_A_ &w->io);
2239 ev_prepare_stop (EV_A_ &w->prepare); 4178 ev_prepare_stop (EV_A_ &w->prepare);
4179 ev_fork_stop (EV_A_ &w->fork);
2240 4180
2241 ev_stop (EV_A_ (W)w); 4181 ev_stop (EV_A_ (W)w);
4182
4183 EV_FREQUENT_CHECK;
2242} 4184}
2243#endif 4185#endif
2244 4186
2245#if EV_FORK_ENABLE 4187#if EV_FORK_ENABLE
2246void 4188void
2247ev_fork_start (EV_P_ ev_fork *w) 4189ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2248{ 4190{
2249 if (expect_false (ev_is_active (w))) 4191 if (expect_false (ev_is_active (w)))
2250 return; 4192 return;
4193
4194 EV_FREQUENT_CHECK;
2251 4195
2252 ev_start (EV_A_ (W)w, ++forkcnt); 4196 ev_start (EV_A_ (W)w, ++forkcnt);
2253 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4197 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2254 forks [forkcnt - 1] = w; 4198 forks [forkcnt - 1] = w;
4199
4200 EV_FREQUENT_CHECK;
2255} 4201}
2256 4202
2257void 4203void
2258ev_fork_stop (EV_P_ ev_fork *w) 4204ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2259{ 4205{
2260 clear_pending (EV_A_ (W)w); 4206 clear_pending (EV_A_ (W)w);
2261 if (expect_false (!ev_is_active (w))) 4207 if (expect_false (!ev_is_active (w)))
2262 return; 4208 return;
2263 4209
4210 EV_FREQUENT_CHECK;
4211
2264 { 4212 {
2265 int active = ((W)w)->active; 4213 int active = ev_active (w);
4214
2266 forks [active - 1] = forks [--forkcnt]; 4215 forks [active - 1] = forks [--forkcnt];
2267 ((W)forks [active - 1])->active = active; 4216 ev_active (forks [active - 1]) = active;
2268 } 4217 }
2269 4218
2270 ev_stop (EV_A_ (W)w); 4219 ev_stop (EV_A_ (W)w);
4220
4221 EV_FREQUENT_CHECK;
4222}
4223#endif
4224
4225#if EV_CLEANUP_ENABLE
4226void
4227ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4228{
4229 if (expect_false (ev_is_active (w)))
4230 return;
4231
4232 EV_FREQUENT_CHECK;
4233
4234 ev_start (EV_A_ (W)w, ++cleanupcnt);
4235 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4236 cleanups [cleanupcnt - 1] = w;
4237
4238 /* cleanup watchers should never keep a refcount on the loop */
4239 ev_unref (EV_A);
4240 EV_FREQUENT_CHECK;
4241}
4242
4243void
4244ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4245{
4246 clear_pending (EV_A_ (W)w);
4247 if (expect_false (!ev_is_active (w)))
4248 return;
4249
4250 EV_FREQUENT_CHECK;
4251 ev_ref (EV_A);
4252
4253 {
4254 int active = ev_active (w);
4255
4256 cleanups [active - 1] = cleanups [--cleanupcnt];
4257 ev_active (cleanups [active - 1]) = active;
4258 }
4259
4260 ev_stop (EV_A_ (W)w);
4261
4262 EV_FREQUENT_CHECK;
4263}
4264#endif
4265
4266#if EV_ASYNC_ENABLE
4267void
4268ev_async_start (EV_P_ ev_async *w) EV_THROW
4269{
4270 if (expect_false (ev_is_active (w)))
4271 return;
4272
4273 w->sent = 0;
4274
4275 evpipe_init (EV_A);
4276
4277 EV_FREQUENT_CHECK;
4278
4279 ev_start (EV_A_ (W)w, ++asynccnt);
4280 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4281 asyncs [asynccnt - 1] = w;
4282
4283 EV_FREQUENT_CHECK;
4284}
4285
4286void
4287ev_async_stop (EV_P_ ev_async *w) EV_THROW
4288{
4289 clear_pending (EV_A_ (W)w);
4290 if (expect_false (!ev_is_active (w)))
4291 return;
4292
4293 EV_FREQUENT_CHECK;
4294
4295 {
4296 int active = ev_active (w);
4297
4298 asyncs [active - 1] = asyncs [--asynccnt];
4299 ev_active (asyncs [active - 1]) = active;
4300 }
4301
4302 ev_stop (EV_A_ (W)w);
4303
4304 EV_FREQUENT_CHECK;
4305}
4306
4307void
4308ev_async_send (EV_P_ ev_async *w) EV_THROW
4309{
4310 w->sent = 1;
4311 evpipe_write (EV_A_ &async_pending);
2271} 4312}
2272#endif 4313#endif
2273 4314
2274/*****************************************************************************/ 4315/*****************************************************************************/
2275 4316
… …
2285once_cb (EV_P_ struct ev_once *once, int revents) 4326once_cb (EV_P_ struct ev_once *once, int revents)
2286{ 4327{
2287 void (*cb)(int revents, void *arg) = once->cb; 4328 void (*cb)(int revents, void *arg) = once->cb;
2288 void *arg = once->arg; 4329 void *arg = once->arg;
2289 4330
2290 ev_io_stop (EV_A_ &once->io); 4331 ev_io_stop (EV_A_ &once->io);
2291 ev_timer_stop (EV_A_ &once->to); 4332 ev_timer_stop (EV_A_ &once->to);
2292 ev_free (once); 4333 ev_free (once);
2293 4334
2294 cb (revents, arg); 4335 cb (revents, arg);
2295} 4336}
2296 4337
2297static void 4338static void
2298once_cb_io (EV_P_ ev_io *w, int revents) 4339once_cb_io (EV_P_ ev_io *w, int revents)
2299{ 4340{
2300 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4341 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4342
4343 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2301} 4344}
2302 4345
2303static void 4346static void
2304once_cb_to (EV_P_ ev_timer *w, int revents) 4347once_cb_to (EV_P_ ev_timer *w, int revents)
2305{ 4348{
2306 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4349 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4350
4351 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2307} 4352}
2308 4353
2309void 4354void
2310ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4355ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2311{ 4356{
2312 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4357 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2313 4358
2314 if (expect_false (!once)) 4359 if (expect_false (!once))
2315 { 4360 {
2316 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4361 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2317 return; 4362 return;
2318 } 4363 }
2319 4364
2320 once->cb = cb; 4365 once->cb = cb;
2321 once->arg = arg; 4366 once->arg = arg;
… …
2333 ev_timer_set (&once->to, timeout, 0.); 4378 ev_timer_set (&once->to, timeout, 0.);
2334 ev_timer_start (EV_A_ &once->to); 4379 ev_timer_start (EV_A_ &once->to);
2335 } 4380 }
2336} 4381}
2337 4382
4383/*****************************************************************************/
4384
4385#if EV_WALK_ENABLE
4386void ecb_cold
4387ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4388{
4389 int i, j;
4390 ev_watcher_list *wl, *wn;
4391
4392 if (types & (EV_IO | EV_EMBED))
4393 for (i = 0; i < anfdmax; ++i)
4394 for (wl = anfds [i].head; wl; )
4395 {
4396 wn = wl->next;
4397
4398#if EV_EMBED_ENABLE
4399 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4400 {
4401 if (types & EV_EMBED)
4402 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4403 }
4404 else
4405#endif
4406#if EV_USE_INOTIFY
4407 if (ev_cb ((ev_io *)wl) == infy_cb)
4408 ;
4409 else
4410#endif
4411 if ((ev_io *)wl != &pipe_w)
4412 if (types & EV_IO)
4413 cb (EV_A_ EV_IO, wl);
4414
4415 wl = wn;
4416 }
4417
4418 if (types & (EV_TIMER | EV_STAT))
4419 for (i = timercnt + HEAP0; i-- > HEAP0; )
4420#if EV_STAT_ENABLE
4421 /*TODO: timer is not always active*/
4422 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4423 {
4424 if (types & EV_STAT)
4425 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4426 }
4427 else
4428#endif
4429 if (types & EV_TIMER)
4430 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4431
4432#if EV_PERIODIC_ENABLE
4433 if (types & EV_PERIODIC)
4434 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4435 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4436#endif
4437
4438#if EV_IDLE_ENABLE
4439 if (types & EV_IDLE)
4440 for (j = NUMPRI; j--; )
4441 for (i = idlecnt [j]; i--; )
4442 cb (EV_A_ EV_IDLE, idles [j][i]);
4443#endif
4444
4445#if EV_FORK_ENABLE
4446 if (types & EV_FORK)
4447 for (i = forkcnt; i--; )
4448 if (ev_cb (forks [i]) != embed_fork_cb)
4449 cb (EV_A_ EV_FORK, forks [i]);
4450#endif
4451
4452#if EV_ASYNC_ENABLE
4453 if (types & EV_ASYNC)
4454 for (i = asynccnt; i--; )
4455 cb (EV_A_ EV_ASYNC, asyncs [i]);
4456#endif
4457
4458#if EV_PREPARE_ENABLE
4459 if (types & EV_PREPARE)
4460 for (i = preparecnt; i--; )
4461# if EV_EMBED_ENABLE
4462 if (ev_cb (prepares [i]) != embed_prepare_cb)
4463# endif
4464 cb (EV_A_ EV_PREPARE, prepares [i]);
4465#endif
4466
4467#if EV_CHECK_ENABLE
4468 if (types & EV_CHECK)
4469 for (i = checkcnt; i--; )
4470 cb (EV_A_ EV_CHECK, checks [i]);
4471#endif
4472
4473#if EV_SIGNAL_ENABLE
4474 if (types & EV_SIGNAL)
4475 for (i = 0; i < EV_NSIG - 1; ++i)
4476 for (wl = signals [i].head; wl; )
4477 {
4478 wn = wl->next;
4479 cb (EV_A_ EV_SIGNAL, wl);
4480 wl = wn;
4481 }
4482#endif
4483
4484#if EV_CHILD_ENABLE
4485 if (types & EV_CHILD)
4486 for (i = (EV_PID_HASHSIZE); i--; )
4487 for (wl = childs [i]; wl; )
4488 {
4489 wn = wl->next;
4490 cb (EV_A_ EV_CHILD, wl);
4491 wl = wn;
4492 }
4493#endif
4494/* EV_STAT 0x00001000 /* stat data changed */
4495/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4496}
4497#endif
4498
2338#if EV_MULTIPLICITY 4499#if EV_MULTIPLICITY
2339 #include "ev_wrap.h" 4500 #include "ev_wrap.h"
2340#endif 4501#endif
2341 4502
2342#ifdef __cplusplus
2343}
2344#endif
2345

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines