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Comparing libev/ev.c (file contents):
Revision 1.156 by root, Wed Nov 28 17:50:13 2007 UTC vs.
Revision 1.445 by root, Sat Jun 2 11:15:29 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
206# include <winsock2.h>
135# include <windows.h> 207# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
138# endif 210# endif
211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
139#endif 261# endif
140 262#endif
141/**/
142 263
143#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
144# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
269# endif
145#endif 270#endif
146 271
147#ifndef EV_USE_REALTIME 272#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
274#endif
275
276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
280# define EV_USE_NANOSLEEP 0
281# endif
149#endif 282#endif
150 283
151#ifndef EV_USE_SELECT 284#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 286#endif
154 287
155#ifndef EV_USE_POLL 288#ifndef EV_USE_POLL
156# ifdef _WIN32 289# ifdef _WIN32
157# define EV_USE_POLL 0 290# define EV_USE_POLL 0
158# else 291# else
159# define EV_USE_POLL 1 292# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 293# endif
161#endif 294#endif
162 295
163#ifndef EV_USE_EPOLL 296#ifndef EV_USE_EPOLL
297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
299# else
164# define EV_USE_EPOLL 0 300# define EV_USE_EPOLL 0
301# endif
165#endif 302#endif
166 303
167#ifndef EV_USE_KQUEUE 304#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 305# define EV_USE_KQUEUE 0
169#endif 306#endif
… …
171#ifndef EV_USE_PORT 308#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 309# define EV_USE_PORT 0
173#endif 310#endif
174 311
175#ifndef EV_USE_INOTIFY 312#ifndef EV_USE_INOTIFY
313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314# define EV_USE_INOTIFY EV_FEATURE_OS
315# else
176# define EV_USE_INOTIFY 0 316# define EV_USE_INOTIFY 0
317# endif
177#endif 318#endif
178 319
179#ifndef EV_PID_HASHSIZE 320#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 322#endif
323
324#ifndef EV_INOTIFY_HASHSIZE
325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
326#endif
327
328#ifndef EV_USE_EVENTFD
329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
330# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 331# else
183# define EV_PID_HASHSIZE 16 332# define EV_USE_EVENTFD 0
184# endif 333# endif
185#endif 334#endif
186 335
187#ifndef EV_INOTIFY_HASHSIZE 336#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 338# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 339# else
191# define EV_INOTIFY_HASHSIZE 16 340# define EV_USE_SIGNALFD 0
192# endif 341# endif
193#endif 342#endif
194 343
195/**/ 344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
196 383
197#ifndef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 385# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 386# define EV_USE_MONOTONIC 0
200#endif 387#endif
… …
202#ifndef CLOCK_REALTIME 389#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 390# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 391# define EV_USE_REALTIME 0
205#endif 392#endif
206 393
207#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h>
209#endif
210
211#if !EV_STAT_ENABLE 394#if !EV_STAT_ENABLE
395# undef EV_USE_INOTIFY
212# define EV_USE_INOTIFY 0 396# define EV_USE_INOTIFY 0
213#endif 397#endif
214 398
399#if !EV_USE_NANOSLEEP
400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
402# include <sys/select.h>
403# endif
404#endif
405
215#if EV_USE_INOTIFY 406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
216# include <sys/inotify.h> 408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
413# endif
414#endif
415
416#if EV_USE_EVENTFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef EFD_NONBLOCK
420# define EFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef EFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define EFD_CLOEXEC O_CLOEXEC
425# else
426# define EFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
430#endif
431
432#if EV_USE_SIGNALFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef SFD_NONBLOCK
436# define SFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef SFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define SFD_CLOEXEC O_CLOEXEC
441# else
442# define SFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
446
447struct signalfd_siginfo
448{
449 uint32_t ssi_signo;
450 char pad[128 - sizeof (uint32_t)];
451};
217#endif 452#endif
218 453
219/**/ 454/**/
455
456#if EV_VERIFY >= 3
457# define EV_FREQUENT_CHECK ev_verify (EV_A)
458#else
459# define EV_FREQUENT_CHECK do { } while (0)
460#endif
461
462/*
463 * This is used to work around floating point rounding problems.
464 * This value is good at least till the year 4000.
465 */
466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
220 468
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
224 471
472#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
473#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
493 *
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
504 */
505
506#ifndef ECB_H
507#define ECB_H
508
509/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010001
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
225#if __GNUC__ >= 3 519 #if __GNUC__
226# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
227# define inline_size static inline /* inline for codesize */ 521 typedef unsigned long long uint64_t;
228# if EV_MINIMAL 522 #else /* _MSC_VER || __BORLANDC__ */
229# define noinline __attribute__ ((noinline)) 523 typedef signed __int64 int64_t;
230# define inline_speed static noinline 524 typedef unsigned __int64 uint64_t;
231# else
232# define noinline
233# define inline_speed static inline
234# endif 525 #endif
526 #ifdef _WIN64
527 #define ECB_PTRSIZE 8
528 typedef uint64_t uintptr_t;
529 typedef int64_t intptr_t;
530 #else
531 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t;
534 #endif
535 typedef intptr_t ptrdiff_t;
235#else 536#else
537 #include <inttypes.h>
538 #if UINTMAX_MAX > 0xffffffffU
539 #define ECB_PTRSIZE 8
540 #else
541 #define ECB_PTRSIZE 4
542 #endif
543#endif
544
545/* many compilers define _GNUC_ to some versions but then only implement
546 * what their idiot authors think are the "more important" extensions,
547 * causing enormous grief in return for some better fake benchmark numbers.
548 * or so.
549 * we try to detect these and simply assume they are not gcc - if they have
550 * an issue with that they should have done it right in the first place.
551 */
552#ifndef ECB_GCC_VERSION
553 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
554 #define ECB_GCC_VERSION(major,minor) 0
555 #else
556 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
557 #endif
558#endif
559
560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
561#define ECB_C99 (__STDC_VERSION__ >= 199901L)
562#define ECB_C11 (__STDC_VERSION__ >= 201112L)
563#define ECB_CPP (__cplusplus+0)
564#define ECB_CPP11 (__cplusplus >= 201103L)
565
566/*****************************************************************************/
567
568/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
569/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
570
571#if ECB_NO_THREADS
572 #define ECB_NO_SMP 1
573#endif
574
575#if ECB_NO_SMP
576 #define ECB_MEMORY_FENCE do { } while (0)
577#endif
578
579#ifndef ECB_MEMORY_FENCE
580 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
581 #if __i386 || __i386__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
583 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
584 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
585 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
586 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
587 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
588 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
589 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
590 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
591 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
592 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
593 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
594 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
595 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
596 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
597 #elif __sparc || __sparc__
598 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
599 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
601 #elif defined __s390__ || defined __s390x__
602 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
603 #elif defined __mips__
604 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
605 #elif defined __alpha__
606 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
607 #elif defined __hppa__
608 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
610 #elif defined __ia64__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
612 #endif
613 #endif
614#endif
615
616#ifndef ECB_MEMORY_FENCE
617 #if ECB_GCC_VERSION(4,7)
618 /* see comment below (stdatomic.h) about the C11 memory model. */
619 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
620 #elif defined __clang && __has_feature (cxx_atomic)
621 /* see comment below (stdatomic.h) about the C11 memory model. */
622 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
623 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
624 #define ECB_MEMORY_FENCE __sync_synchronize ()
625 #elif _MSC_VER >= 1400 /* VC++ 2005 */
626 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
627 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
628 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
629 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
630 #elif defined _WIN32
631 #include <WinNT.h>
632 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
633 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
634 #include <mbarrier.h>
635 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
636 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
637 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
638 #elif __xlC__
639 #define ECB_MEMORY_FENCE __sync ()
640 #endif
641#endif
642
643#ifndef ECB_MEMORY_FENCE
644 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
645 /* we assume that these memory fences work on all variables/all memory accesses, */
646 /* not just C11 atomics and atomic accesses */
647 #include <stdatomic.h>
648 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
649 /* any fence other than seq_cst, which isn't very efficient for us. */
650 /* Why that is, we don't know - either the C11 memory model is quite useless */
651 /* for most usages, or gcc and clang have a bug */
652 /* I *currently* lean towards the latter, and inefficiently implement */
653 /* all three of ecb's fences as a seq_cst fence */
654 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
655 #endif
656#endif
657
658#ifndef ECB_MEMORY_FENCE
659 #if !ECB_AVOID_PTHREADS
660 /*
661 * if you get undefined symbol references to pthread_mutex_lock,
662 * or failure to find pthread.h, then you should implement
663 * the ECB_MEMORY_FENCE operations for your cpu/compiler
664 * OR provide pthread.h and link against the posix thread library
665 * of your system.
666 */
667 #include <pthread.h>
668 #define ECB_NEEDS_PTHREADS 1
669 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
670
671 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
672 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
673 #endif
674#endif
675
676#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
677 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
678#endif
679
680#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
681 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
682#endif
683
684/*****************************************************************************/
685
686#if __cplusplus
687 #define ecb_inline static inline
688#elif ECB_GCC_VERSION(2,5)
689 #define ecb_inline static __inline__
690#elif ECB_C99
691 #define ecb_inline static inline
692#else
693 #define ecb_inline static
694#endif
695
696#if ECB_GCC_VERSION(3,3)
697 #define ecb_restrict __restrict__
698#elif ECB_C99
699 #define ecb_restrict restrict
700#else
701 #define ecb_restrict
702#endif
703
704typedef int ecb_bool;
705
706#define ECB_CONCAT_(a, b) a ## b
707#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
708#define ECB_STRINGIFY_(a) # a
709#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
710
711#define ecb_function_ ecb_inline
712
713#if ECB_GCC_VERSION(3,1)
714 #define ecb_attribute(attrlist) __attribute__(attrlist)
715 #define ecb_is_constant(expr) __builtin_constant_p (expr)
716 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
717 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
718#else
719 #define ecb_attribute(attrlist)
720 #define ecb_is_constant(expr) 0
236# define expect(expr,value) (expr) 721 #define ecb_expect(expr,value) (expr)
237# define inline_speed static 722 #define ecb_prefetch(addr,rw,locality)
238# define inline_size static
239# define noinline
240#endif 723#endif
241 724
725/* no emulation for ecb_decltype */
726#if ECB_GCC_VERSION(4,5)
727 #define ecb_decltype(x) __decltype(x)
728#elif ECB_GCC_VERSION(3,0)
729 #define ecb_decltype(x) __typeof(x)
730#endif
731
732#define ecb_noinline ecb_attribute ((__noinline__))
733#define ecb_unused ecb_attribute ((__unused__))
734#define ecb_const ecb_attribute ((__const__))
735#define ecb_pure ecb_attribute ((__pure__))
736
737#if ECB_C11
738 #define ecb_noreturn _Noreturn
739#else
740 #define ecb_noreturn ecb_attribute ((__noreturn__))
741#endif
742
743#if ECB_GCC_VERSION(4,3)
744 #define ecb_artificial ecb_attribute ((__artificial__))
745 #define ecb_hot ecb_attribute ((__hot__))
746 #define ecb_cold ecb_attribute ((__cold__))
747#else
748 #define ecb_artificial
749 #define ecb_hot
750 #define ecb_cold
751#endif
752
753/* put around conditional expressions if you are very sure that the */
754/* expression is mostly true or mostly false. note that these return */
755/* booleans, not the expression. */
242#define expect_false(expr) expect ((expr) != 0, 0) 756#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
243#define expect_true(expr) expect ((expr) != 0, 1) 757#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
758/* for compatibility to the rest of the world */
759#define ecb_likely(expr) ecb_expect_true (expr)
760#define ecb_unlikely(expr) ecb_expect_false (expr)
244 761
762/* count trailing zero bits and count # of one bits */
763#if ECB_GCC_VERSION(3,4)
764 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
765 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
766 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
767 #define ecb_ctz32(x) __builtin_ctz (x)
768 #define ecb_ctz64(x) __builtin_ctzll (x)
769 #define ecb_popcount32(x) __builtin_popcount (x)
770 /* no popcountll */
771#else
772 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
773 ecb_function_ int
774 ecb_ctz32 (uint32_t x)
775 {
776 int r = 0;
777
778 x &= ~x + 1; /* this isolates the lowest bit */
779
780#if ECB_branchless_on_i386
781 r += !!(x & 0xaaaaaaaa) << 0;
782 r += !!(x & 0xcccccccc) << 1;
783 r += !!(x & 0xf0f0f0f0) << 2;
784 r += !!(x & 0xff00ff00) << 3;
785 r += !!(x & 0xffff0000) << 4;
786#else
787 if (x & 0xaaaaaaaa) r += 1;
788 if (x & 0xcccccccc) r += 2;
789 if (x & 0xf0f0f0f0) r += 4;
790 if (x & 0xff00ff00) r += 8;
791 if (x & 0xffff0000) r += 16;
792#endif
793
794 return r;
795 }
796
797 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
798 ecb_function_ int
799 ecb_ctz64 (uint64_t x)
800 {
801 int shift = x & 0xffffffffU ? 0 : 32;
802 return ecb_ctz32 (x >> shift) + shift;
803 }
804
805 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
806 ecb_function_ int
807 ecb_popcount32 (uint32_t x)
808 {
809 x -= (x >> 1) & 0x55555555;
810 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
811 x = ((x >> 4) + x) & 0x0f0f0f0f;
812 x *= 0x01010101;
813
814 return x >> 24;
815 }
816
817 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
818 ecb_function_ int ecb_ld32 (uint32_t x)
819 {
820 int r = 0;
821
822 if (x >> 16) { x >>= 16; r += 16; }
823 if (x >> 8) { x >>= 8; r += 8; }
824 if (x >> 4) { x >>= 4; r += 4; }
825 if (x >> 2) { x >>= 2; r += 2; }
826 if (x >> 1) { r += 1; }
827
828 return r;
829 }
830
831 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
832 ecb_function_ int ecb_ld64 (uint64_t x)
833 {
834 int r = 0;
835
836 if (x >> 32) { x >>= 32; r += 32; }
837
838 return r + ecb_ld32 (x);
839 }
840#endif
841
842ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
843ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
844ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
845ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
846
847ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
848ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
849{
850 return ( (x * 0x0802U & 0x22110U)
851 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
852}
853
854ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
855ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
856{
857 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
858 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
859 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
860 x = ( x >> 8 ) | ( x << 8);
861
862 return x;
863}
864
865ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
866ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
867{
868 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
869 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
870 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
871 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
872 x = ( x >> 16 ) | ( x << 16);
873
874 return x;
875}
876
877/* popcount64 is only available on 64 bit cpus as gcc builtin */
878/* so for this version we are lazy */
879ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
880ecb_function_ int
881ecb_popcount64 (uint64_t x)
882{
883 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
884}
885
886ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
887ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
888ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
889ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
890ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
891ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
892ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
893ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
894
895ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
896ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
897ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
898ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
899ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
900ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
901ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
902ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
903
904#if ECB_GCC_VERSION(4,3)
905 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
906 #define ecb_bswap32(x) __builtin_bswap32 (x)
907 #define ecb_bswap64(x) __builtin_bswap64 (x)
908#else
909 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
910 ecb_function_ uint16_t
911 ecb_bswap16 (uint16_t x)
912 {
913 return ecb_rotl16 (x, 8);
914 }
915
916 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
917 ecb_function_ uint32_t
918 ecb_bswap32 (uint32_t x)
919 {
920 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
921 }
922
923 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
924 ecb_function_ uint64_t
925 ecb_bswap64 (uint64_t x)
926 {
927 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
928 }
929#endif
930
931#if ECB_GCC_VERSION(4,5)
932 #define ecb_unreachable() __builtin_unreachable ()
933#else
934 /* this seems to work fine, but gcc always emits a warning for it :/ */
935 ecb_inline void ecb_unreachable (void) ecb_noreturn;
936 ecb_inline void ecb_unreachable (void) { }
937#endif
938
939/* try to tell the compiler that some condition is definitely true */
940#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
941
942ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
943ecb_inline unsigned char
944ecb_byteorder_helper (void)
945{
946 const uint32_t u = 0x11223344;
947 return *(unsigned char *)&u;
948}
949
950ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
951ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
952ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
953ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
954
955#if ECB_GCC_VERSION(3,0) || ECB_C99
956 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
957#else
958 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
959#endif
960
961#if __cplusplus
962 template<typename T>
963 static inline T ecb_div_rd (T val, T div)
964 {
965 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
966 }
967 template<typename T>
968 static inline T ecb_div_ru (T val, T div)
969 {
970 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
971 }
972#else
973 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
974 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
975#endif
976
977#if ecb_cplusplus_does_not_suck
978 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
979 template<typename T, int N>
980 static inline int ecb_array_length (const T (&arr)[N])
981 {
982 return N;
983 }
984#else
985 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
986#endif
987
988#endif
989
990/* ECB.H END */
991
992#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
993/* if your architecture doesn't need memory fences, e.g. because it is
994 * single-cpu/core, or if you use libev in a project that doesn't use libev
995 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
996 * libev, in which cases the memory fences become nops.
997 * alternatively, you can remove this #error and link against libpthread,
998 * which will then provide the memory fences.
999 */
1000# error "memory fences not defined for your architecture, please report"
1001#endif
1002
1003#ifndef ECB_MEMORY_FENCE
1004# define ECB_MEMORY_FENCE do { } while (0)
1005# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1006# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1007#endif
1008
1009#define expect_false(cond) ecb_expect_false (cond)
1010#define expect_true(cond) ecb_expect_true (cond)
1011#define noinline ecb_noinline
1012
1013#define inline_size ecb_inline
1014
1015#if EV_FEATURE_CODE
1016# define inline_speed ecb_inline
1017#else
1018# define inline_speed static noinline
1019#endif
1020
245#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1021#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1022
1023#if EV_MINPRI == EV_MAXPRI
1024# define ABSPRI(w) (((W)w), 0)
1025#else
246#define ABSPRI(w) ((w)->priority - EV_MINPRI) 1026# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1027#endif
247 1028
248#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 1029#define EMPTY /* required for microsofts broken pseudo-c compiler */
249#define EMPTY2(a,b) /* used to suppress some warnings */ 1030#define EMPTY2(a,b) /* used to suppress some warnings */
250 1031
251typedef ev_watcher *W; 1032typedef ev_watcher *W;
252typedef ev_watcher_list *WL; 1033typedef ev_watcher_list *WL;
253typedef ev_watcher_time *WT; 1034typedef ev_watcher_time *WT;
254 1035
1036#define ev_active(w) ((W)(w))->active
1037#define ev_at(w) ((WT)(w))->at
1038
1039#if EV_USE_REALTIME
1040/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1041/* giving it a reasonably high chance of working on typical architectures */
1042static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1043#endif
1044
1045#if EV_USE_MONOTONIC
255static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1046static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1047#endif
1048
1049#ifndef EV_FD_TO_WIN32_HANDLE
1050# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1051#endif
1052#ifndef EV_WIN32_HANDLE_TO_FD
1053# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1054#endif
1055#ifndef EV_WIN32_CLOSE_FD
1056# define EV_WIN32_CLOSE_FD(fd) close (fd)
1057#endif
256 1058
257#ifdef _WIN32 1059#ifdef _WIN32
258# include "ev_win32.c" 1060# include "ev_win32.c"
259#endif 1061#endif
260 1062
261/*****************************************************************************/ 1063/*****************************************************************************/
262 1064
1065/* define a suitable floor function (only used by periodics atm) */
1066
1067#if EV_USE_FLOOR
1068# include <math.h>
1069# define ev_floor(v) floor (v)
1070#else
1071
1072#include <float.h>
1073
1074/* a floor() replacement function, should be independent of ev_tstamp type */
1075static ev_tstamp noinline
1076ev_floor (ev_tstamp v)
1077{
1078 /* the choice of shift factor is not terribly important */
1079#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1080 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1081#else
1082 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1083#endif
1084
1085 /* argument too large for an unsigned long? */
1086 if (expect_false (v >= shift))
1087 {
1088 ev_tstamp f;
1089
1090 if (v == v - 1.)
1091 return v; /* very large number */
1092
1093 f = shift * ev_floor (v * (1. / shift));
1094 return f + ev_floor (v - f);
1095 }
1096
1097 /* special treatment for negative args? */
1098 if (expect_false (v < 0.))
1099 {
1100 ev_tstamp f = -ev_floor (-v);
1101
1102 return f - (f == v ? 0 : 1);
1103 }
1104
1105 /* fits into an unsigned long */
1106 return (unsigned long)v;
1107}
1108
1109#endif
1110
1111/*****************************************************************************/
1112
1113#ifdef __linux
1114# include <sys/utsname.h>
1115#endif
1116
1117static unsigned int noinline ecb_cold
1118ev_linux_version (void)
1119{
1120#ifdef __linux
1121 unsigned int v = 0;
1122 struct utsname buf;
1123 int i;
1124 char *p = buf.release;
1125
1126 if (uname (&buf))
1127 return 0;
1128
1129 for (i = 3+1; --i; )
1130 {
1131 unsigned int c = 0;
1132
1133 for (;;)
1134 {
1135 if (*p >= '0' && *p <= '9')
1136 c = c * 10 + *p++ - '0';
1137 else
1138 {
1139 p += *p == '.';
1140 break;
1141 }
1142 }
1143
1144 v = (v << 8) | c;
1145 }
1146
1147 return v;
1148#else
1149 return 0;
1150#endif
1151}
1152
1153/*****************************************************************************/
1154
1155#if EV_AVOID_STDIO
1156static void noinline ecb_cold
1157ev_printerr (const char *msg)
1158{
1159 write (STDERR_FILENO, msg, strlen (msg));
1160}
1161#endif
1162
263static void (*syserr_cb)(const char *msg); 1163static void (*syserr_cb)(const char *msg) EV_THROW;
264 1164
265void 1165void ecb_cold
266ev_set_syserr_cb (void (*cb)(const char *msg)) 1166ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
267{ 1167{
268 syserr_cb = cb; 1168 syserr_cb = cb;
269} 1169}
270 1170
271static void noinline 1171static void noinline ecb_cold
272syserr (const char *msg) 1172ev_syserr (const char *msg)
273{ 1173{
274 if (!msg) 1174 if (!msg)
275 msg = "(libev) system error"; 1175 msg = "(libev) system error";
276 1176
277 if (syserr_cb) 1177 if (syserr_cb)
278 syserr_cb (msg); 1178 syserr_cb (msg);
279 else 1179 else
280 { 1180 {
1181#if EV_AVOID_STDIO
1182 ev_printerr (msg);
1183 ev_printerr (": ");
1184 ev_printerr (strerror (errno));
1185 ev_printerr ("\n");
1186#else
281 perror (msg); 1187 perror (msg);
1188#endif
282 abort (); 1189 abort ();
283 } 1190 }
284} 1191}
285 1192
1193static void *
1194ev_realloc_emul (void *ptr, long size) EV_THROW
1195{
1196#if __GLIBC__
1197 return realloc (ptr, size);
1198#else
1199 /* some systems, notably openbsd and darwin, fail to properly
1200 * implement realloc (x, 0) (as required by both ansi c-89 and
1201 * the single unix specification, so work around them here.
1202 */
1203
1204 if (size)
1205 return realloc (ptr, size);
1206
1207 free (ptr);
1208 return 0;
1209#endif
1210}
1211
286static void *(*alloc)(void *ptr, long size); 1212static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
287 1213
288void 1214void ecb_cold
289ev_set_allocator (void *(*cb)(void *ptr, long size)) 1215ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
290{ 1216{
291 alloc = cb; 1217 alloc = cb;
292} 1218}
293 1219
294inline_speed void * 1220inline_speed void *
295ev_realloc (void *ptr, long size) 1221ev_realloc (void *ptr, long size)
296{ 1222{
297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1223 ptr = alloc (ptr, size);
298 1224
299 if (!ptr && size) 1225 if (!ptr && size)
300 { 1226 {
1227#if EV_AVOID_STDIO
1228 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1229#else
301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1230 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1231#endif
302 abort (); 1232 abort ();
303 } 1233 }
304 1234
305 return ptr; 1235 return ptr;
306} 1236}
… …
308#define ev_malloc(size) ev_realloc (0, (size)) 1238#define ev_malloc(size) ev_realloc (0, (size))
309#define ev_free(ptr) ev_realloc ((ptr), 0) 1239#define ev_free(ptr) ev_realloc ((ptr), 0)
310 1240
311/*****************************************************************************/ 1241/*****************************************************************************/
312 1242
1243/* set in reify when reification needed */
1244#define EV_ANFD_REIFY 1
1245
1246/* file descriptor info structure */
313typedef struct 1247typedef struct
314{ 1248{
315 WL head; 1249 WL head;
316 unsigned char events; 1250 unsigned char events; /* the events watched for */
1251 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1252 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
317 unsigned char reify; 1253 unsigned char unused;
1254#if EV_USE_EPOLL
1255 unsigned int egen; /* generation counter to counter epoll bugs */
1256#endif
318#if EV_SELECT_IS_WINSOCKET 1257#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
319 SOCKET handle; 1258 SOCKET handle;
320#endif 1259#endif
1260#if EV_USE_IOCP
1261 OVERLAPPED or, ow;
1262#endif
321} ANFD; 1263} ANFD;
322 1264
1265/* stores the pending event set for a given watcher */
323typedef struct 1266typedef struct
324{ 1267{
325 W w; 1268 W w;
326 int events; 1269 int events; /* the pending event set for the given watcher */
327} ANPENDING; 1270} ANPENDING;
328 1271
329#if EV_USE_INOTIFY 1272#if EV_USE_INOTIFY
1273/* hash table entry per inotify-id */
330typedef struct 1274typedef struct
331{ 1275{
332 WL head; 1276 WL head;
333} ANFS; 1277} ANFS;
1278#endif
1279
1280/* Heap Entry */
1281#if EV_HEAP_CACHE_AT
1282 /* a heap element */
1283 typedef struct {
1284 ev_tstamp at;
1285 WT w;
1286 } ANHE;
1287
1288 #define ANHE_w(he) (he).w /* access watcher, read-write */
1289 #define ANHE_at(he) (he).at /* access cached at, read-only */
1290 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1291#else
1292 /* a heap element */
1293 typedef WT ANHE;
1294
1295 #define ANHE_w(he) (he)
1296 #define ANHE_at(he) (he)->at
1297 #define ANHE_at_cache(he)
334#endif 1298#endif
335 1299
336#if EV_MULTIPLICITY 1300#if EV_MULTIPLICITY
337 1301
338 struct ev_loop 1302 struct ev_loop
… …
344 #undef VAR 1308 #undef VAR
345 }; 1309 };
346 #include "ev_wrap.h" 1310 #include "ev_wrap.h"
347 1311
348 static struct ev_loop default_loop_struct; 1312 static struct ev_loop default_loop_struct;
349 struct ev_loop *ev_default_loop_ptr; 1313 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
350 1314
351#else 1315#else
352 1316
353 ev_tstamp ev_rt_now; 1317 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
354 #define VAR(name,decl) static decl; 1318 #define VAR(name,decl) static decl;
355 #include "ev_vars.h" 1319 #include "ev_vars.h"
356 #undef VAR 1320 #undef VAR
357 1321
358 static int ev_default_loop_ptr; 1322 static int ev_default_loop_ptr;
359 1323
360#endif 1324#endif
361 1325
1326#if EV_FEATURE_API
1327# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1328# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1329# define EV_INVOKE_PENDING invoke_cb (EV_A)
1330#else
1331# define EV_RELEASE_CB (void)0
1332# define EV_ACQUIRE_CB (void)0
1333# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1334#endif
1335
1336#define EVBREAK_RECURSE 0x80
1337
362/*****************************************************************************/ 1338/*****************************************************************************/
363 1339
1340#ifndef EV_HAVE_EV_TIME
364ev_tstamp 1341ev_tstamp
365ev_time (void) 1342ev_time (void) EV_THROW
366{ 1343{
367#if EV_USE_REALTIME 1344#if EV_USE_REALTIME
1345 if (expect_true (have_realtime))
1346 {
368 struct timespec ts; 1347 struct timespec ts;
369 clock_gettime (CLOCK_REALTIME, &ts); 1348 clock_gettime (CLOCK_REALTIME, &ts);
370 return ts.tv_sec + ts.tv_nsec * 1e-9; 1349 return ts.tv_sec + ts.tv_nsec * 1e-9;
371#else 1350 }
1351#endif
1352
372 struct timeval tv; 1353 struct timeval tv;
373 gettimeofday (&tv, 0); 1354 gettimeofday (&tv, 0);
374 return tv.tv_sec + tv.tv_usec * 1e-6; 1355 return tv.tv_sec + tv.tv_usec * 1e-6;
375#endif
376} 1356}
1357#endif
377 1358
378ev_tstamp inline_size 1359inline_size ev_tstamp
379get_clock (void) 1360get_clock (void)
380{ 1361{
381#if EV_USE_MONOTONIC 1362#if EV_USE_MONOTONIC
382 if (expect_true (have_monotonic)) 1363 if (expect_true (have_monotonic))
383 { 1364 {
… …
390 return ev_time (); 1371 return ev_time ();
391} 1372}
392 1373
393#if EV_MULTIPLICITY 1374#if EV_MULTIPLICITY
394ev_tstamp 1375ev_tstamp
395ev_now (EV_P) 1376ev_now (EV_P) EV_THROW
396{ 1377{
397 return ev_rt_now; 1378 return ev_rt_now;
398} 1379}
399#endif 1380#endif
400 1381
401#define array_roundsize(type,n) (((n) | 4) & ~3) 1382void
1383ev_sleep (ev_tstamp delay) EV_THROW
1384{
1385 if (delay > 0.)
1386 {
1387#if EV_USE_NANOSLEEP
1388 struct timespec ts;
1389
1390 EV_TS_SET (ts, delay);
1391 nanosleep (&ts, 0);
1392#elif defined _WIN32
1393 Sleep ((unsigned long)(delay * 1e3));
1394#else
1395 struct timeval tv;
1396
1397 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1398 /* something not guaranteed by newer posix versions, but guaranteed */
1399 /* by older ones */
1400 EV_TV_SET (tv, delay);
1401 select (0, 0, 0, 0, &tv);
1402#endif
1403 }
1404}
1405
1406/*****************************************************************************/
1407
1408#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1409
1410/* find a suitable new size for the given array, */
1411/* hopefully by rounding to a nice-to-malloc size */
1412inline_size int
1413array_nextsize (int elem, int cur, int cnt)
1414{
1415 int ncur = cur + 1;
1416
1417 do
1418 ncur <<= 1;
1419 while (cnt > ncur);
1420
1421 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1422 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1423 {
1424 ncur *= elem;
1425 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1426 ncur = ncur - sizeof (void *) * 4;
1427 ncur /= elem;
1428 }
1429
1430 return ncur;
1431}
1432
1433static void * noinline ecb_cold
1434array_realloc (int elem, void *base, int *cur, int cnt)
1435{
1436 *cur = array_nextsize (elem, *cur, cnt);
1437 return ev_realloc (base, elem * *cur);
1438}
1439
1440#define array_init_zero(base,count) \
1441 memset ((void *)(base), 0, sizeof (*(base)) * (count))
402 1442
403#define array_needsize(type,base,cur,cnt,init) \ 1443#define array_needsize(type,base,cur,cnt,init) \
404 if (expect_false ((cnt) > cur)) \ 1444 if (expect_false ((cnt) > (cur))) \
405 { \ 1445 { \
406 int newcnt = cur; \ 1446 int ecb_unused ocur_ = (cur); \
407 do \ 1447 (base) = (type *)array_realloc \
408 { \ 1448 (sizeof (type), (base), &(cur), (cnt)); \
409 newcnt = array_roundsize (type, newcnt << 1); \ 1449 init ((base) + (ocur_), (cur) - ocur_); \
410 } \
411 while ((cnt) > newcnt); \
412 \
413 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
414 init (base + cur, newcnt - cur); \
415 cur = newcnt; \
416 } 1450 }
417 1451
1452#if 0
418#define array_slim(type,stem) \ 1453#define array_slim(type,stem) \
419 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1454 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
420 { \ 1455 { \
421 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1456 stem ## max = array_roundsize (stem ## cnt >> 1); \
422 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1457 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
423 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1458 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
424 } 1459 }
1460#endif
425 1461
426#define array_free(stem, idx) \ 1462#define array_free(stem, idx) \
427 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1463 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
428 1464
429/*****************************************************************************/ 1465/*****************************************************************************/
430 1466
1467/* dummy callback for pending events */
1468static void noinline
1469pendingcb (EV_P_ ev_prepare *w, int revents)
1470{
1471}
1472
431void noinline 1473void noinline
432ev_feed_event (EV_P_ void *w, int revents) 1474ev_feed_event (EV_P_ void *w, int revents) EV_THROW
433{ 1475{
434 W w_ = (W)w; 1476 W w_ = (W)w;
1477 int pri = ABSPRI (w_);
435 1478
436 if (expect_false (w_->pending)) 1479 if (expect_false (w_->pending))
1480 pendings [pri][w_->pending - 1].events |= revents;
1481 else
437 { 1482 {
1483 w_->pending = ++pendingcnt [pri];
1484 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1485 pendings [pri][w_->pending - 1].w = w_;
438 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1486 pendings [pri][w_->pending - 1].events = revents;
439 return;
440 } 1487 }
441 1488
442 w_->pending = ++pendingcnt [ABSPRI (w_)]; 1489 pendingpri = NUMPRI - 1;
443 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
444 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
445 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
446} 1490}
447 1491
448void inline_size 1492inline_speed void
1493feed_reverse (EV_P_ W w)
1494{
1495 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1496 rfeeds [rfeedcnt++] = w;
1497}
1498
1499inline_size void
1500feed_reverse_done (EV_P_ int revents)
1501{
1502 do
1503 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1504 while (rfeedcnt);
1505}
1506
1507inline_speed void
449queue_events (EV_P_ W *events, int eventcnt, int type) 1508queue_events (EV_P_ W *events, int eventcnt, int type)
450{ 1509{
451 int i; 1510 int i;
452 1511
453 for (i = 0; i < eventcnt; ++i) 1512 for (i = 0; i < eventcnt; ++i)
454 ev_feed_event (EV_A_ events [i], type); 1513 ev_feed_event (EV_A_ events [i], type);
455} 1514}
456 1515
457/*****************************************************************************/ 1516/*****************************************************************************/
458 1517
459void inline_size 1518inline_speed void
460anfds_init (ANFD *base, int count)
461{
462 while (count--)
463 {
464 base->head = 0;
465 base->events = EV_NONE;
466 base->reify = 0;
467
468 ++base;
469 }
470}
471
472void inline_speed
473fd_event (EV_P_ int fd, int revents) 1519fd_event_nocheck (EV_P_ int fd, int revents)
474{ 1520{
475 ANFD *anfd = anfds + fd; 1521 ANFD *anfd = anfds + fd;
476 ev_io *w; 1522 ev_io *w;
477 1523
478 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1524 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
482 if (ev) 1528 if (ev)
483 ev_feed_event (EV_A_ (W)w, ev); 1529 ev_feed_event (EV_A_ (W)w, ev);
484 } 1530 }
485} 1531}
486 1532
1533/* do not submit kernel events for fds that have reify set */
1534/* because that means they changed while we were polling for new events */
1535inline_speed void
1536fd_event (EV_P_ int fd, int revents)
1537{
1538 ANFD *anfd = anfds + fd;
1539
1540 if (expect_true (!anfd->reify))
1541 fd_event_nocheck (EV_A_ fd, revents);
1542}
1543
487void 1544void
488ev_feed_fd_event (EV_P_ int fd, int revents) 1545ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
489{ 1546{
1547 if (fd >= 0 && fd < anfdmax)
490 fd_event (EV_A_ fd, revents); 1548 fd_event_nocheck (EV_A_ fd, revents);
491} 1549}
492 1550
493void inline_size 1551/* make sure the external fd watch events are in-sync */
1552/* with the kernel/libev internal state */
1553inline_size void
494fd_reify (EV_P) 1554fd_reify (EV_P)
495{ 1555{
496 int i; 1556 int i;
1557
1558#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1559 for (i = 0; i < fdchangecnt; ++i)
1560 {
1561 int fd = fdchanges [i];
1562 ANFD *anfd = anfds + fd;
1563
1564 if (anfd->reify & EV__IOFDSET && anfd->head)
1565 {
1566 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1567
1568 if (handle != anfd->handle)
1569 {
1570 unsigned long arg;
1571
1572 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1573
1574 /* handle changed, but fd didn't - we need to do it in two steps */
1575 backend_modify (EV_A_ fd, anfd->events, 0);
1576 anfd->events = 0;
1577 anfd->handle = handle;
1578 }
1579 }
1580 }
1581#endif
497 1582
498 for (i = 0; i < fdchangecnt; ++i) 1583 for (i = 0; i < fdchangecnt; ++i)
499 { 1584 {
500 int fd = fdchanges [i]; 1585 int fd = fdchanges [i];
501 ANFD *anfd = anfds + fd; 1586 ANFD *anfd = anfds + fd;
502 ev_io *w; 1587 ev_io *w;
503 1588
504 int events = 0; 1589 unsigned char o_events = anfd->events;
1590 unsigned char o_reify = anfd->reify;
505 1591
506 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1592 anfd->reify = 0;
507 events |= w->events;
508 1593
509#if EV_SELECT_IS_WINSOCKET 1594 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
510 if (events)
511 { 1595 {
512 unsigned long argp; 1596 anfd->events = 0;
513 anfd->handle = _get_osfhandle (fd); 1597
514 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1599 anfd->events |= (unsigned char)w->events;
1600
1601 if (o_events != anfd->events)
1602 o_reify = EV__IOFDSET; /* actually |= */
515 } 1603 }
516#endif
517 1604
518 anfd->reify = 0; 1605 if (o_reify & EV__IOFDSET)
519
520 backend_modify (EV_A_ fd, anfd->events, events); 1606 backend_modify (EV_A_ fd, o_events, anfd->events);
521 anfd->events = events;
522 } 1607 }
523 1608
524 fdchangecnt = 0; 1609 fdchangecnt = 0;
525} 1610}
526 1611
527void inline_size 1612/* something about the given fd changed */
1613inline_size void
528fd_change (EV_P_ int fd) 1614fd_change (EV_P_ int fd, int flags)
529{ 1615{
530 if (expect_false (anfds [fd].reify)) 1616 unsigned char reify = anfds [fd].reify;
531 return;
532
533 anfds [fd].reify = 1; 1617 anfds [fd].reify |= flags;
534 1618
1619 if (expect_true (!reify))
1620 {
535 ++fdchangecnt; 1621 ++fdchangecnt;
536 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1622 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
537 fdchanges [fdchangecnt - 1] = fd; 1623 fdchanges [fdchangecnt - 1] = fd;
1624 }
538} 1625}
539 1626
540void inline_speed 1627/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1628inline_speed void ecb_cold
541fd_kill (EV_P_ int fd) 1629fd_kill (EV_P_ int fd)
542{ 1630{
543 ev_io *w; 1631 ev_io *w;
544 1632
545 while ((w = (ev_io *)anfds [fd].head)) 1633 while ((w = (ev_io *)anfds [fd].head))
… …
547 ev_io_stop (EV_A_ w); 1635 ev_io_stop (EV_A_ w);
548 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1636 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
549 } 1637 }
550} 1638}
551 1639
552int inline_size 1640/* check whether the given fd is actually valid, for error recovery */
1641inline_size int ecb_cold
553fd_valid (int fd) 1642fd_valid (int fd)
554{ 1643{
555#ifdef _WIN32 1644#ifdef _WIN32
556 return _get_osfhandle (fd) != -1; 1645 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
557#else 1646#else
558 return fcntl (fd, F_GETFD) != -1; 1647 return fcntl (fd, F_GETFD) != -1;
559#endif 1648#endif
560} 1649}
561 1650
562/* called on EBADF to verify fds */ 1651/* called on EBADF to verify fds */
563static void noinline 1652static void noinline ecb_cold
564fd_ebadf (EV_P) 1653fd_ebadf (EV_P)
565{ 1654{
566 int fd; 1655 int fd;
567 1656
568 for (fd = 0; fd < anfdmax; ++fd) 1657 for (fd = 0; fd < anfdmax; ++fd)
569 if (anfds [fd].events) 1658 if (anfds [fd].events)
570 if (!fd_valid (fd) == -1 && errno == EBADF) 1659 if (!fd_valid (fd) && errno == EBADF)
571 fd_kill (EV_A_ fd); 1660 fd_kill (EV_A_ fd);
572} 1661}
573 1662
574/* called on ENOMEM in select/poll to kill some fds and retry */ 1663/* called on ENOMEM in select/poll to kill some fds and retry */
575static void noinline 1664static void noinline ecb_cold
576fd_enomem (EV_P) 1665fd_enomem (EV_P)
577{ 1666{
578 int fd; 1667 int fd;
579 1668
580 for (fd = anfdmax; fd--; ) 1669 for (fd = anfdmax; fd--; )
581 if (anfds [fd].events) 1670 if (anfds [fd].events)
582 { 1671 {
583 fd_kill (EV_A_ fd); 1672 fd_kill (EV_A_ fd);
584 return; 1673 break;
585 } 1674 }
586} 1675}
587 1676
588/* usually called after fork if backend needs to re-arm all fds from scratch */ 1677/* usually called after fork if backend needs to re-arm all fds from scratch */
589static void noinline 1678static void noinline
590fd_rearm_all (EV_P) 1679fd_rearm_all (EV_P)
591{ 1680{
592 int fd; 1681 int fd;
593 1682
594 /* this should be highly optimised to not do anything but set a flag */
595 for (fd = 0; fd < anfdmax; ++fd) 1683 for (fd = 0; fd < anfdmax; ++fd)
596 if (anfds [fd].events) 1684 if (anfds [fd].events)
597 { 1685 {
598 anfds [fd].events = 0; 1686 anfds [fd].events = 0;
599 fd_change (EV_A_ fd); 1687 anfds [fd].emask = 0;
1688 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
600 } 1689 }
601} 1690}
602 1691
603/*****************************************************************************/ 1692/* used to prepare libev internal fd's */
604 1693/* this is not fork-safe */
605void inline_speed 1694inline_speed void
606upheap (WT *heap, int k)
607{
608 WT w = heap [k];
609
610 while (k && heap [k >> 1]->at > w->at)
611 {
612 heap [k] = heap [k >> 1];
613 ((W)heap [k])->active = k + 1;
614 k >>= 1;
615 }
616
617 heap [k] = w;
618 ((W)heap [k])->active = k + 1;
619
620}
621
622void inline_speed
623downheap (WT *heap, int N, int k)
624{
625 WT w = heap [k];
626
627 while (k < (N >> 1))
628 {
629 int j = k << 1;
630
631 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
632 ++j;
633
634 if (w->at <= heap [j]->at)
635 break;
636
637 heap [k] = heap [j];
638 ((W)heap [k])->active = k + 1;
639 k = j;
640 }
641
642 heap [k] = w;
643 ((W)heap [k])->active = k + 1;
644}
645
646void inline_size
647adjustheap (WT *heap, int N, int k)
648{
649 upheap (heap, k);
650 downheap (heap, N, k);
651}
652
653/*****************************************************************************/
654
655typedef struct
656{
657 WL head;
658 sig_atomic_t volatile gotsig;
659} ANSIG;
660
661static ANSIG *signals;
662static int signalmax;
663
664static int sigpipe [2];
665static sig_atomic_t volatile gotsig;
666static ev_io sigev;
667
668void inline_size
669signals_init (ANSIG *base, int count)
670{
671 while (count--)
672 {
673 base->head = 0;
674 base->gotsig = 0;
675
676 ++base;
677 }
678}
679
680static void
681sighandler (int signum)
682{
683#if _WIN32
684 signal (signum, sighandler);
685#endif
686
687 signals [signum - 1].gotsig = 1;
688
689 if (!gotsig)
690 {
691 int old_errno = errno;
692 gotsig = 1;
693 write (sigpipe [1], &signum, 1);
694 errno = old_errno;
695 }
696}
697
698void noinline
699ev_feed_signal_event (EV_P_ int signum)
700{
701 WL w;
702
703#if EV_MULTIPLICITY
704 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
705#endif
706
707 --signum;
708
709 if (signum < 0 || signum >= signalmax)
710 return;
711
712 signals [signum].gotsig = 0;
713
714 for (w = signals [signum].head; w; w = w->next)
715 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
716}
717
718static void
719sigcb (EV_P_ ev_io *iow, int revents)
720{
721 int signum;
722
723 read (sigpipe [0], &revents, 1);
724 gotsig = 0;
725
726 for (signum = signalmax; signum--; )
727 if (signals [signum].gotsig)
728 ev_feed_signal_event (EV_A_ signum + 1);
729}
730
731void inline_size
732fd_intern (int fd) 1695fd_intern (int fd)
733{ 1696{
734#ifdef _WIN32 1697#ifdef _WIN32
735 int arg = 1; 1698 unsigned long arg = 1;
736 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1699 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
737#else 1700#else
738 fcntl (fd, F_SETFD, FD_CLOEXEC); 1701 fcntl (fd, F_SETFD, FD_CLOEXEC);
739 fcntl (fd, F_SETFL, O_NONBLOCK); 1702 fcntl (fd, F_SETFL, O_NONBLOCK);
740#endif 1703#endif
741} 1704}
742 1705
743static void noinline
744siginit (EV_P)
745{
746 fd_intern (sigpipe [0]);
747 fd_intern (sigpipe [1]);
748
749 ev_io_set (&sigev, sigpipe [0], EV_READ);
750 ev_io_start (EV_A_ &sigev);
751 ev_unref (EV_A); /* child watcher should not keep loop alive */
752}
753
754/*****************************************************************************/ 1706/*****************************************************************************/
755 1707
756static ev_child *childs [EV_PID_HASHSIZE]; 1708/*
1709 * the heap functions want a real array index. array index 0 is guaranteed to not
1710 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1711 * the branching factor of the d-tree.
1712 */
757 1713
1714/*
1715 * at the moment we allow libev the luxury of two heaps,
1716 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1717 * which is more cache-efficient.
1718 * the difference is about 5% with 50000+ watchers.
1719 */
1720#if EV_USE_4HEAP
1721
1722#define DHEAP 4
1723#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1724#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1725#define UPHEAP_DONE(p,k) ((p) == (k))
1726
1727/* away from the root */
1728inline_speed void
1729downheap (ANHE *heap, int N, int k)
1730{
1731 ANHE he = heap [k];
1732 ANHE *E = heap + N + HEAP0;
1733
1734 for (;;)
1735 {
1736 ev_tstamp minat;
1737 ANHE *minpos;
1738 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1739
1740 /* find minimum child */
1741 if (expect_true (pos + DHEAP - 1 < E))
1742 {
1743 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1744 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1745 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1746 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1747 }
1748 else if (pos < E)
1749 {
1750 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1751 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1752 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1753 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1754 }
1755 else
1756 break;
1757
1758 if (ANHE_at (he) <= minat)
1759 break;
1760
1761 heap [k] = *minpos;
1762 ev_active (ANHE_w (*minpos)) = k;
1763
1764 k = minpos - heap;
1765 }
1766
1767 heap [k] = he;
1768 ev_active (ANHE_w (he)) = k;
1769}
1770
1771#else /* 4HEAP */
1772
1773#define HEAP0 1
1774#define HPARENT(k) ((k) >> 1)
1775#define UPHEAP_DONE(p,k) (!(p))
1776
1777/* away from the root */
1778inline_speed void
1779downheap (ANHE *heap, int N, int k)
1780{
1781 ANHE he = heap [k];
1782
1783 for (;;)
1784 {
1785 int c = k << 1;
1786
1787 if (c >= N + HEAP0)
1788 break;
1789
1790 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1791 ? 1 : 0;
1792
1793 if (ANHE_at (he) <= ANHE_at (heap [c]))
1794 break;
1795
1796 heap [k] = heap [c];
1797 ev_active (ANHE_w (heap [k])) = k;
1798
1799 k = c;
1800 }
1801
1802 heap [k] = he;
1803 ev_active (ANHE_w (he)) = k;
1804}
1805#endif
1806
1807/* towards the root */
1808inline_speed void
1809upheap (ANHE *heap, int k)
1810{
1811 ANHE he = heap [k];
1812
1813 for (;;)
1814 {
1815 int p = HPARENT (k);
1816
1817 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1818 break;
1819
1820 heap [k] = heap [p];
1821 ev_active (ANHE_w (heap [k])) = k;
1822 k = p;
1823 }
1824
1825 heap [k] = he;
1826 ev_active (ANHE_w (he)) = k;
1827}
1828
1829/* move an element suitably so it is in a correct place */
1830inline_size void
1831adjustheap (ANHE *heap, int N, int k)
1832{
1833 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1834 upheap (heap, k);
1835 else
1836 downheap (heap, N, k);
1837}
1838
1839/* rebuild the heap: this function is used only once and executed rarely */
1840inline_size void
1841reheap (ANHE *heap, int N)
1842{
1843 int i;
1844
1845 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1846 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1847 for (i = 0; i < N; ++i)
1848 upheap (heap, i + HEAP0);
1849}
1850
1851/*****************************************************************************/
1852
1853/* associate signal watchers to a signal signal */
1854typedef struct
1855{
1856 EV_ATOMIC_T pending;
1857#if EV_MULTIPLICITY
1858 EV_P;
1859#endif
1860 WL head;
1861} ANSIG;
1862
1863static ANSIG signals [EV_NSIG - 1];
1864
1865/*****************************************************************************/
1866
1867#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1868
1869static void noinline ecb_cold
1870evpipe_init (EV_P)
1871{
1872 if (!ev_is_active (&pipe_w))
1873 {
1874# if EV_USE_EVENTFD
1875 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1876 if (evfd < 0 && errno == EINVAL)
1877 evfd = eventfd (0, 0);
1878
1879 if (evfd >= 0)
1880 {
1881 evpipe [0] = -1;
1882 fd_intern (evfd); /* doing it twice doesn't hurt */
1883 ev_io_set (&pipe_w, evfd, EV_READ);
1884 }
1885 else
1886# endif
1887 {
1888 while (pipe (evpipe))
1889 ev_syserr ("(libev) error creating signal/async pipe");
1890
1891 fd_intern (evpipe [0]);
1892 fd_intern (evpipe [1]);
1893 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1894 }
1895
1896 ev_io_start (EV_A_ &pipe_w);
1897 ev_unref (EV_A); /* watcher should not keep loop alive */
1898 }
1899}
1900
1901inline_speed void
1902evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1903{
1904 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1905
1906 if (expect_true (*flag))
1907 return;
1908
1909 *flag = 1;
1910 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1911
1912 pipe_write_skipped = 1;
1913
1914 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1915
1916 if (pipe_write_wanted)
1917 {
1918 int old_errno;
1919
1920 pipe_write_skipped = 0;
1921 ECB_MEMORY_FENCE_RELEASE;
1922
1923 old_errno = errno; /* save errno because write will clobber it */
1924
1925#if EV_USE_EVENTFD
1926 if (evfd >= 0)
1927 {
1928 uint64_t counter = 1;
1929 write (evfd, &counter, sizeof (uint64_t));
1930 }
1931 else
1932#endif
1933 {
758#ifndef _WIN32 1934#ifdef _WIN32
1935 WSABUF buf;
1936 DWORD sent;
1937 buf.buf = &buf;
1938 buf.len = 1;
1939 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1940#else
1941 write (evpipe [1], &(evpipe [1]), 1);
1942#endif
1943 }
1944
1945 errno = old_errno;
1946 }
1947}
1948
1949/* called whenever the libev signal pipe */
1950/* got some events (signal, async) */
1951static void
1952pipecb (EV_P_ ev_io *iow, int revents)
1953{
1954 int i;
1955
1956 if (revents & EV_READ)
1957 {
1958#if EV_USE_EVENTFD
1959 if (evfd >= 0)
1960 {
1961 uint64_t counter;
1962 read (evfd, &counter, sizeof (uint64_t));
1963 }
1964 else
1965#endif
1966 {
1967 char dummy[4];
1968#ifdef _WIN32
1969 WSABUF buf;
1970 DWORD recvd;
1971 DWORD flags = 0;
1972 buf.buf = dummy;
1973 buf.len = sizeof (dummy);
1974 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
1975#else
1976 read (evpipe [0], &dummy, sizeof (dummy));
1977#endif
1978 }
1979 }
1980
1981 pipe_write_skipped = 0;
1982
1983 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1984
1985#if EV_SIGNAL_ENABLE
1986 if (sig_pending)
1987 {
1988 sig_pending = 0;
1989
1990 ECB_MEMORY_FENCE;
1991
1992 for (i = EV_NSIG - 1; i--; )
1993 if (expect_false (signals [i].pending))
1994 ev_feed_signal_event (EV_A_ i + 1);
1995 }
1996#endif
1997
1998#if EV_ASYNC_ENABLE
1999 if (async_pending)
2000 {
2001 async_pending = 0;
2002
2003 ECB_MEMORY_FENCE;
2004
2005 for (i = asynccnt; i--; )
2006 if (asyncs [i]->sent)
2007 {
2008 asyncs [i]->sent = 0;
2009 ECB_MEMORY_FENCE_RELEASE;
2010 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2011 }
2012 }
2013#endif
2014}
2015
2016/*****************************************************************************/
2017
2018void
2019ev_feed_signal (int signum) EV_THROW
2020{
2021#if EV_MULTIPLICITY
2022 EV_P = signals [signum - 1].loop;
2023
2024 if (!EV_A)
2025 return;
2026#endif
2027
2028 if (!ev_active (&pipe_w))
2029 return;
2030
2031 signals [signum - 1].pending = 1;
2032 evpipe_write (EV_A_ &sig_pending);
2033}
2034
2035static void
2036ev_sighandler (int signum)
2037{
2038#ifdef _WIN32
2039 signal (signum, ev_sighandler);
2040#endif
2041
2042 ev_feed_signal (signum);
2043}
2044
2045void noinline
2046ev_feed_signal_event (EV_P_ int signum) EV_THROW
2047{
2048 WL w;
2049
2050 if (expect_false (signum <= 0 || signum > EV_NSIG))
2051 return;
2052
2053 --signum;
2054
2055#if EV_MULTIPLICITY
2056 /* it is permissible to try to feed a signal to the wrong loop */
2057 /* or, likely more useful, feeding a signal nobody is waiting for */
2058
2059 if (expect_false (signals [signum].loop != EV_A))
2060 return;
2061#endif
2062
2063 signals [signum].pending = 0;
2064 ECB_MEMORY_FENCE_RELEASE;
2065
2066 for (w = signals [signum].head; w; w = w->next)
2067 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2068}
2069
2070#if EV_USE_SIGNALFD
2071static void
2072sigfdcb (EV_P_ ev_io *iow, int revents)
2073{
2074 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2075
2076 for (;;)
2077 {
2078 ssize_t res = read (sigfd, si, sizeof (si));
2079
2080 /* not ISO-C, as res might be -1, but works with SuS */
2081 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2082 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2083
2084 if (res < (ssize_t)sizeof (si))
2085 break;
2086 }
2087}
2088#endif
2089
2090#endif
2091
2092/*****************************************************************************/
2093
2094#if EV_CHILD_ENABLE
2095static WL childs [EV_PID_HASHSIZE];
759 2096
760static ev_signal childev; 2097static ev_signal childev;
761 2098
762void inline_speed 2099#ifndef WIFCONTINUED
2100# define WIFCONTINUED(status) 0
2101#endif
2102
2103/* handle a single child status event */
2104inline_speed void
763child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2105child_reap (EV_P_ int chain, int pid, int status)
764{ 2106{
765 ev_child *w; 2107 ev_child *w;
2108 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
766 2109
767 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2110 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2111 {
768 if (w->pid == pid || !w->pid) 2112 if ((w->pid == pid || !w->pid)
2113 && (!traced || (w->flags & 1)))
769 { 2114 {
770 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 2115 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
771 w->rpid = pid; 2116 w->rpid = pid;
772 w->rstatus = status; 2117 w->rstatus = status;
773 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2118 ev_feed_event (EV_A_ (W)w, EV_CHILD);
774 } 2119 }
2120 }
775} 2121}
776 2122
777#ifndef WCONTINUED 2123#ifndef WCONTINUED
778# define WCONTINUED 0 2124# define WCONTINUED 0
779#endif 2125#endif
780 2126
2127/* called on sigchld etc., calls waitpid */
781static void 2128static void
782childcb (EV_P_ ev_signal *sw, int revents) 2129childcb (EV_P_ ev_signal *sw, int revents)
783{ 2130{
784 int pid, status; 2131 int pid, status;
785 2132
… …
788 if (!WCONTINUED 2135 if (!WCONTINUED
789 || errno != EINVAL 2136 || errno != EINVAL
790 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2137 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
791 return; 2138 return;
792 2139
793 /* make sure we are called again until all childs have been reaped */ 2140 /* make sure we are called again until all children have been reaped */
794 /* we need to do it this way so that the callback gets called before we continue */ 2141 /* we need to do it this way so that the callback gets called before we continue */
795 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2142 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
796 2143
797 child_reap (EV_A_ sw, pid, pid, status); 2144 child_reap (EV_A_ pid, pid, status);
798 if (EV_PID_HASHSIZE > 1) 2145 if ((EV_PID_HASHSIZE) > 1)
799 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2146 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
800} 2147}
801 2148
802#endif 2149#endif
803 2150
804/*****************************************************************************/ 2151/*****************************************************************************/
805 2152
2153#if EV_USE_IOCP
2154# include "ev_iocp.c"
2155#endif
806#if EV_USE_PORT 2156#if EV_USE_PORT
807# include "ev_port.c" 2157# include "ev_port.c"
808#endif 2158#endif
809#if EV_USE_KQUEUE 2159#if EV_USE_KQUEUE
810# include "ev_kqueue.c" 2160# include "ev_kqueue.c"
… …
817#endif 2167#endif
818#if EV_USE_SELECT 2168#if EV_USE_SELECT
819# include "ev_select.c" 2169# include "ev_select.c"
820#endif 2170#endif
821 2171
822int 2172int ecb_cold
823ev_version_major (void) 2173ev_version_major (void) EV_THROW
824{ 2174{
825 return EV_VERSION_MAJOR; 2175 return EV_VERSION_MAJOR;
826} 2176}
827 2177
828int 2178int ecb_cold
829ev_version_minor (void) 2179ev_version_minor (void) EV_THROW
830{ 2180{
831 return EV_VERSION_MINOR; 2181 return EV_VERSION_MINOR;
832} 2182}
833 2183
834/* return true if we are running with elevated privileges and should ignore env variables */ 2184/* return true if we are running with elevated privileges and should ignore env variables */
835int inline_size 2185int inline_size ecb_cold
836enable_secure (void) 2186enable_secure (void)
837{ 2187{
838#ifdef _WIN32 2188#ifdef _WIN32
839 return 0; 2189 return 0;
840#else 2190#else
841 return getuid () != geteuid () 2191 return getuid () != geteuid ()
842 || getgid () != getegid (); 2192 || getgid () != getegid ();
843#endif 2193#endif
844} 2194}
845 2195
846unsigned int 2196unsigned int ecb_cold
847ev_supported_backends (void) 2197ev_supported_backends (void) EV_THROW
848{ 2198{
849 unsigned int flags = 0; 2199 unsigned int flags = 0;
850 2200
851 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2201 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
852 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2202 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
855 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2205 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
856 2206
857 return flags; 2207 return flags;
858} 2208}
859 2209
860unsigned int 2210unsigned int ecb_cold
861ev_recommended_backends (void) 2211ev_recommended_backends (void) EV_THROW
862{ 2212{
863 unsigned int flags = ev_supported_backends (); 2213 unsigned int flags = ev_supported_backends ();
864 2214
865#ifndef __NetBSD__ 2215#ifndef __NetBSD__
866 /* kqueue is borked on everything but netbsd apparently */ 2216 /* kqueue is borked on everything but netbsd apparently */
867 /* it usually doesn't work correctly on anything but sockets and pipes */ 2217 /* it usually doesn't work correctly on anything but sockets and pipes */
868 flags &= ~EVBACKEND_KQUEUE; 2218 flags &= ~EVBACKEND_KQUEUE;
869#endif 2219#endif
870#ifdef __APPLE__ 2220#ifdef __APPLE__
871 // flags &= ~EVBACKEND_KQUEUE; for documentation 2221 /* only select works correctly on that "unix-certified" platform */
872 flags &= ~EVBACKEND_POLL; 2222 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2223 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2224#endif
2225#ifdef __FreeBSD__
2226 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
873#endif 2227#endif
874 2228
875 return flags; 2229 return flags;
876} 2230}
877 2231
2232unsigned int ecb_cold
2233ev_embeddable_backends (void) EV_THROW
2234{
2235 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2236
2237 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2238 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2239 flags &= ~EVBACKEND_EPOLL;
2240
2241 return flags;
2242}
2243
878unsigned int 2244unsigned int
879ev_embeddable_backends (void) 2245ev_backend (EV_P) EV_THROW
880{ 2246{
881 return EVBACKEND_EPOLL 2247 return backend;
882 | EVBACKEND_KQUEUE
883 | EVBACKEND_PORT;
884} 2248}
885 2249
2250#if EV_FEATURE_API
886unsigned int 2251unsigned int
887ev_backend (EV_P) 2252ev_iteration (EV_P) EV_THROW
888{ 2253{
889 return backend; 2254 return loop_count;
890} 2255}
891 2256
2257unsigned int
2258ev_depth (EV_P) EV_THROW
2259{
2260 return loop_depth;
2261}
2262
2263void
2264ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2265{
2266 io_blocktime = interval;
2267}
2268
2269void
2270ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2271{
2272 timeout_blocktime = interval;
2273}
2274
2275void
2276ev_set_userdata (EV_P_ void *data) EV_THROW
2277{
2278 userdata = data;
2279}
2280
2281void *
2282ev_userdata (EV_P) EV_THROW
2283{
2284 return userdata;
2285}
2286
2287void
2288ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2289{
2290 invoke_cb = invoke_pending_cb;
2291}
2292
2293void
2294ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2295{
2296 release_cb = release;
2297 acquire_cb = acquire;
2298}
2299#endif
2300
2301/* initialise a loop structure, must be zero-initialised */
892static void noinline 2302static void noinline ecb_cold
893loop_init (EV_P_ unsigned int flags) 2303loop_init (EV_P_ unsigned int flags) EV_THROW
894{ 2304{
895 if (!backend) 2305 if (!backend)
896 { 2306 {
2307 origflags = flags;
2308
2309#if EV_USE_REALTIME
2310 if (!have_realtime)
2311 {
2312 struct timespec ts;
2313
2314 if (!clock_gettime (CLOCK_REALTIME, &ts))
2315 have_realtime = 1;
2316 }
2317#endif
2318
897#if EV_USE_MONOTONIC 2319#if EV_USE_MONOTONIC
2320 if (!have_monotonic)
898 { 2321 {
899 struct timespec ts; 2322 struct timespec ts;
2323
900 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2324 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
901 have_monotonic = 1; 2325 have_monotonic = 1;
902 } 2326 }
903#endif 2327#endif
904 2328
905 ev_rt_now = ev_time (); 2329 /* pid check not overridable via env */
906 mn_now = get_clock (); 2330#ifndef _WIN32
907 now_floor = mn_now; 2331 if (flags & EVFLAG_FORKCHECK)
908 rtmn_diff = ev_rt_now - mn_now; 2332 curpid = getpid ();
2333#endif
909 2334
910 if (!(flags & EVFLAG_NOENV) 2335 if (!(flags & EVFLAG_NOENV)
911 && !enable_secure () 2336 && !enable_secure ()
912 && getenv ("LIBEV_FLAGS")) 2337 && getenv ("LIBEV_FLAGS"))
913 flags = atoi (getenv ("LIBEV_FLAGS")); 2338 flags = atoi (getenv ("LIBEV_FLAGS"));
914 2339
915 if (!(flags & 0x0000ffffUL)) 2340 ev_rt_now = ev_time ();
2341 mn_now = get_clock ();
2342 now_floor = mn_now;
2343 rtmn_diff = ev_rt_now - mn_now;
2344#if EV_FEATURE_API
2345 invoke_cb = ev_invoke_pending;
2346#endif
2347
2348 io_blocktime = 0.;
2349 timeout_blocktime = 0.;
2350 backend = 0;
2351 backend_fd = -1;
2352 sig_pending = 0;
2353#if EV_ASYNC_ENABLE
2354 async_pending = 0;
2355#endif
2356 pipe_write_skipped = 0;
2357 pipe_write_wanted = 0;
2358#if EV_USE_INOTIFY
2359 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2360#endif
2361#if EV_USE_SIGNALFD
2362 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2363#endif
2364
2365 if (!(flags & EVBACKEND_MASK))
916 flags |= ev_recommended_backends (); 2366 flags |= ev_recommended_backends ();
917 2367
918 backend = 0;
919 backend_fd = -1;
920#if EV_USE_INOTIFY 2368#if EV_USE_IOCP
921 fs_fd = -2; 2369 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
922#endif 2370#endif
923
924#if EV_USE_PORT 2371#if EV_USE_PORT
925 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2372 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
926#endif 2373#endif
927#if EV_USE_KQUEUE 2374#if EV_USE_KQUEUE
928 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2375 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
935#endif 2382#endif
936#if EV_USE_SELECT 2383#if EV_USE_SELECT
937 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2384 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
938#endif 2385#endif
939 2386
2387 ev_prepare_init (&pending_w, pendingcb);
2388
2389#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
940 ev_init (&sigev, sigcb); 2390 ev_init (&pipe_w, pipecb);
941 ev_set_priority (&sigev, EV_MAXPRI); 2391 ev_set_priority (&pipe_w, EV_MAXPRI);
2392#endif
942 } 2393 }
943} 2394}
944 2395
945static void noinline 2396/* free up a loop structure */
2397void ecb_cold
946loop_destroy (EV_P) 2398ev_loop_destroy (EV_P)
947{ 2399{
948 int i; 2400 int i;
2401
2402#if EV_MULTIPLICITY
2403 /* mimic free (0) */
2404 if (!EV_A)
2405 return;
2406#endif
2407
2408#if EV_CLEANUP_ENABLE
2409 /* queue cleanup watchers (and execute them) */
2410 if (expect_false (cleanupcnt))
2411 {
2412 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2413 EV_INVOKE_PENDING;
2414 }
2415#endif
2416
2417#if EV_CHILD_ENABLE
2418 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2419 {
2420 ev_ref (EV_A); /* child watcher */
2421 ev_signal_stop (EV_A_ &childev);
2422 }
2423#endif
2424
2425 if (ev_is_active (&pipe_w))
2426 {
2427 /*ev_ref (EV_A);*/
2428 /*ev_io_stop (EV_A_ &pipe_w);*/
2429
2430#if EV_USE_EVENTFD
2431 if (evfd >= 0)
2432 close (evfd);
2433#endif
2434
2435 if (evpipe [0] >= 0)
2436 {
2437 EV_WIN32_CLOSE_FD (evpipe [0]);
2438 EV_WIN32_CLOSE_FD (evpipe [1]);
2439 }
2440 }
2441
2442#if EV_USE_SIGNALFD
2443 if (ev_is_active (&sigfd_w))
2444 close (sigfd);
2445#endif
949 2446
950#if EV_USE_INOTIFY 2447#if EV_USE_INOTIFY
951 if (fs_fd >= 0) 2448 if (fs_fd >= 0)
952 close (fs_fd); 2449 close (fs_fd);
953#endif 2450#endif
954 2451
955 if (backend_fd >= 0) 2452 if (backend_fd >= 0)
956 close (backend_fd); 2453 close (backend_fd);
957 2454
2455#if EV_USE_IOCP
2456 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2457#endif
958#if EV_USE_PORT 2458#if EV_USE_PORT
959 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2459 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
960#endif 2460#endif
961#if EV_USE_KQUEUE 2461#if EV_USE_KQUEUE
962 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2462 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
970#if EV_USE_SELECT 2470#if EV_USE_SELECT
971 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 2471 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
972#endif 2472#endif
973 2473
974 for (i = NUMPRI; i--; ) 2474 for (i = NUMPRI; i--; )
2475 {
975 array_free (pending, [i]); 2476 array_free (pending, [i]);
2477#if EV_IDLE_ENABLE
2478 array_free (idle, [i]);
2479#endif
2480 }
2481
2482 ev_free (anfds); anfds = 0; anfdmax = 0;
976 2483
977 /* have to use the microsoft-never-gets-it-right macro */ 2484 /* have to use the microsoft-never-gets-it-right macro */
2485 array_free (rfeed, EMPTY);
978 array_free (fdchange, EMPTY0); 2486 array_free (fdchange, EMPTY);
979 array_free (timer, EMPTY0); 2487 array_free (timer, EMPTY);
980#if EV_PERIODIC_ENABLE 2488#if EV_PERIODIC_ENABLE
981 array_free (periodic, EMPTY0); 2489 array_free (periodic, EMPTY);
982#endif 2490#endif
2491#if EV_FORK_ENABLE
2492 array_free (fork, EMPTY);
2493#endif
2494#if EV_CLEANUP_ENABLE
983 array_free (idle, EMPTY0); 2495 array_free (cleanup, EMPTY);
2496#endif
984 array_free (prepare, EMPTY0); 2497 array_free (prepare, EMPTY);
985 array_free (check, EMPTY0); 2498 array_free (check, EMPTY);
2499#if EV_ASYNC_ENABLE
2500 array_free (async, EMPTY);
2501#endif
986 2502
987 backend = 0; 2503 backend = 0;
988}
989 2504
2505#if EV_MULTIPLICITY
2506 if (ev_is_default_loop (EV_A))
2507#endif
2508 ev_default_loop_ptr = 0;
2509#if EV_MULTIPLICITY
2510 else
2511 ev_free (EV_A);
2512#endif
2513}
2514
2515#if EV_USE_INOTIFY
990void inline_size infy_fork (EV_P); 2516inline_size void infy_fork (EV_P);
2517#endif
991 2518
992void inline_size 2519inline_size void
993loop_fork (EV_P) 2520loop_fork (EV_P)
994{ 2521{
995#if EV_USE_PORT 2522#if EV_USE_PORT
996 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2523 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
997#endif 2524#endif
… …
1003#endif 2530#endif
1004#if EV_USE_INOTIFY 2531#if EV_USE_INOTIFY
1005 infy_fork (EV_A); 2532 infy_fork (EV_A);
1006#endif 2533#endif
1007 2534
1008 if (ev_is_active (&sigev)) 2535 if (ev_is_active (&pipe_w))
1009 { 2536 {
1010 /* default loop */ 2537 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1011 2538
1012 ev_ref (EV_A); 2539 ev_ref (EV_A);
1013 ev_io_stop (EV_A_ &sigev); 2540 ev_io_stop (EV_A_ &pipe_w);
1014 close (sigpipe [0]);
1015 close (sigpipe [1]);
1016 2541
1017 while (pipe (sigpipe)) 2542#if EV_USE_EVENTFD
1018 syserr ("(libev) error creating pipe"); 2543 if (evfd >= 0)
2544 close (evfd);
2545#endif
1019 2546
2547 if (evpipe [0] >= 0)
2548 {
2549 EV_WIN32_CLOSE_FD (evpipe [0]);
2550 EV_WIN32_CLOSE_FD (evpipe [1]);
2551 }
2552
2553#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1020 siginit (EV_A); 2554 evpipe_init (EV_A);
2555 /* iterate over everything, in case we missed something before */
2556 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2557#endif
1021 } 2558 }
1022 2559
1023 postfork = 0; 2560 postfork = 0;
1024} 2561}
1025 2562
1026#if EV_MULTIPLICITY 2563#if EV_MULTIPLICITY
2564
1027struct ev_loop * 2565struct ev_loop * ecb_cold
1028ev_loop_new (unsigned int flags) 2566ev_loop_new (unsigned int flags) EV_THROW
1029{ 2567{
1030 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2568 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1031 2569
1032 memset (loop, 0, sizeof (struct ev_loop)); 2570 memset (EV_A, 0, sizeof (struct ev_loop));
1033
1034 loop_init (EV_A_ flags); 2571 loop_init (EV_A_ flags);
1035 2572
1036 if (ev_backend (EV_A)) 2573 if (ev_backend (EV_A))
1037 return loop; 2574 return EV_A;
1038 2575
2576 ev_free (EV_A);
1039 return 0; 2577 return 0;
1040} 2578}
1041 2579
1042void 2580#endif /* multiplicity */
1043ev_loop_destroy (EV_P)
1044{
1045 loop_destroy (EV_A);
1046 ev_free (loop);
1047}
1048 2581
1049void 2582#if EV_VERIFY
1050ev_loop_fork (EV_P) 2583static void noinline ecb_cold
2584verify_watcher (EV_P_ W w)
1051{ 2585{
1052 postfork = 1; 2586 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1053}
1054 2587
2588 if (w->pending)
2589 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2590}
2591
2592static void noinline ecb_cold
2593verify_heap (EV_P_ ANHE *heap, int N)
2594{
2595 int i;
2596
2597 for (i = HEAP0; i < N + HEAP0; ++i)
2598 {
2599 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2600 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2601 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2602
2603 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2604 }
2605}
2606
2607static void noinline ecb_cold
2608array_verify (EV_P_ W *ws, int cnt)
2609{
2610 while (cnt--)
2611 {
2612 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2613 verify_watcher (EV_A_ ws [cnt]);
2614 }
2615}
2616#endif
2617
2618#if EV_FEATURE_API
2619void ecb_cold
2620ev_verify (EV_P) EV_THROW
2621{
2622#if EV_VERIFY
2623 int i;
2624 WL w, w2;
2625
2626 assert (activecnt >= -1);
2627
2628 assert (fdchangemax >= fdchangecnt);
2629 for (i = 0; i < fdchangecnt; ++i)
2630 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2631
2632 assert (anfdmax >= 0);
2633 for (i = 0; i < anfdmax; ++i)
2634 {
2635 int j = 0;
2636
2637 for (w = w2 = anfds [i].head; w; w = w->next)
2638 {
2639 verify_watcher (EV_A_ (W)w);
2640
2641 if (j++ & 1)
2642 {
2643 assert (("libev: io watcher list contains a loop", w != w2));
2644 w2 = w2->next;
2645 }
2646
2647 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2648 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2649 }
2650 }
2651
2652 assert (timermax >= timercnt);
2653 verify_heap (EV_A_ timers, timercnt);
2654
2655#if EV_PERIODIC_ENABLE
2656 assert (periodicmax >= periodiccnt);
2657 verify_heap (EV_A_ periodics, periodiccnt);
2658#endif
2659
2660 for (i = NUMPRI; i--; )
2661 {
2662 assert (pendingmax [i] >= pendingcnt [i]);
2663#if EV_IDLE_ENABLE
2664 assert (idleall >= 0);
2665 assert (idlemax [i] >= idlecnt [i]);
2666 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2667#endif
2668 }
2669
2670#if EV_FORK_ENABLE
2671 assert (forkmax >= forkcnt);
2672 array_verify (EV_A_ (W *)forks, forkcnt);
2673#endif
2674
2675#if EV_CLEANUP_ENABLE
2676 assert (cleanupmax >= cleanupcnt);
2677 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2678#endif
2679
2680#if EV_ASYNC_ENABLE
2681 assert (asyncmax >= asynccnt);
2682 array_verify (EV_A_ (W *)asyncs, asynccnt);
2683#endif
2684
2685#if EV_PREPARE_ENABLE
2686 assert (preparemax >= preparecnt);
2687 array_verify (EV_A_ (W *)prepares, preparecnt);
2688#endif
2689
2690#if EV_CHECK_ENABLE
2691 assert (checkmax >= checkcnt);
2692 array_verify (EV_A_ (W *)checks, checkcnt);
2693#endif
2694
2695# if 0
2696#if EV_CHILD_ENABLE
2697 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2698 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2699#endif
2700# endif
2701#endif
2702}
1055#endif 2703#endif
1056 2704
1057#if EV_MULTIPLICITY 2705#if EV_MULTIPLICITY
1058struct ev_loop * 2706struct ev_loop * ecb_cold
1059ev_default_loop_init (unsigned int flags)
1060#else 2707#else
1061int 2708int
2709#endif
1062ev_default_loop (unsigned int flags) 2710ev_default_loop (unsigned int flags) EV_THROW
1063#endif
1064{ 2711{
1065 if (sigpipe [0] == sigpipe [1])
1066 if (pipe (sigpipe))
1067 return 0;
1068
1069 if (!ev_default_loop_ptr) 2712 if (!ev_default_loop_ptr)
1070 { 2713 {
1071#if EV_MULTIPLICITY 2714#if EV_MULTIPLICITY
1072 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2715 EV_P = ev_default_loop_ptr = &default_loop_struct;
1073#else 2716#else
1074 ev_default_loop_ptr = 1; 2717 ev_default_loop_ptr = 1;
1075#endif 2718#endif
1076 2719
1077 loop_init (EV_A_ flags); 2720 loop_init (EV_A_ flags);
1078 2721
1079 if (ev_backend (EV_A)) 2722 if (ev_backend (EV_A))
1080 { 2723 {
1081 siginit (EV_A); 2724#if EV_CHILD_ENABLE
1082
1083#ifndef _WIN32
1084 ev_signal_init (&childev, childcb, SIGCHLD); 2725 ev_signal_init (&childev, childcb, SIGCHLD);
1085 ev_set_priority (&childev, EV_MAXPRI); 2726 ev_set_priority (&childev, EV_MAXPRI);
1086 ev_signal_start (EV_A_ &childev); 2727 ev_signal_start (EV_A_ &childev);
1087 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2728 ev_unref (EV_A); /* child watcher should not keep loop alive */
1088#endif 2729#endif
… …
1093 2734
1094 return ev_default_loop_ptr; 2735 return ev_default_loop_ptr;
1095} 2736}
1096 2737
1097void 2738void
1098ev_default_destroy (void) 2739ev_loop_fork (EV_P) EV_THROW
1099{ 2740{
1100#if EV_MULTIPLICITY 2741 postfork = 1;
1101 struct ev_loop *loop = ev_default_loop_ptr;
1102#endif
1103
1104#ifndef _WIN32
1105 ev_ref (EV_A); /* child watcher */
1106 ev_signal_stop (EV_A_ &childev);
1107#endif
1108
1109 ev_ref (EV_A); /* signal watcher */
1110 ev_io_stop (EV_A_ &sigev);
1111
1112 close (sigpipe [0]); sigpipe [0] = 0;
1113 close (sigpipe [1]); sigpipe [1] = 0;
1114
1115 loop_destroy (EV_A);
1116} 2742}
2743
2744/*****************************************************************************/
1117 2745
1118void 2746void
1119ev_default_fork (void) 2747ev_invoke (EV_P_ void *w, int revents)
1120{ 2748{
1121#if EV_MULTIPLICITY 2749 EV_CB_INVOKE ((W)w, revents);
1122 struct ev_loop *loop = ev_default_loop_ptr;
1123#endif
1124
1125 if (backend)
1126 postfork = 1;
1127} 2750}
1128 2751
1129/*****************************************************************************/ 2752unsigned int
1130 2753ev_pending_count (EV_P) EV_THROW
1131int inline_size
1132any_pending (EV_P)
1133{ 2754{
1134 int pri; 2755 int pri;
2756 unsigned int count = 0;
1135 2757
1136 for (pri = NUMPRI; pri--; ) 2758 for (pri = NUMPRI; pri--; )
1137 if (pendingcnt [pri]) 2759 count += pendingcnt [pri];
1138 return 1;
1139 2760
1140 return 0; 2761 return count;
1141} 2762}
1142 2763
1143void inline_speed 2764void noinline
1144call_pending (EV_P) 2765ev_invoke_pending (EV_P)
1145{ 2766{
1146 int pri; 2767 pendingpri = NUMPRI;
1147 2768
1148 for (pri = NUMPRI; pri--; ) 2769 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2770 {
2771 --pendingpri;
2772
1149 while (pendingcnt [pri]) 2773 while (pendingcnt [pendingpri])
1150 {
1151 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1152
1153 if (expect_true (p->w))
1154 { 2774 {
1155 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 2775 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1156 2776
1157 p->w->pending = 0; 2777 p->w->pending = 0;
1158 EV_CB_INVOKE (p->w, p->events); 2778 EV_CB_INVOKE (p->w, p->events);
2779 EV_FREQUENT_CHECK;
2780 }
2781 }
2782}
2783
2784#if EV_IDLE_ENABLE
2785/* make idle watchers pending. this handles the "call-idle */
2786/* only when higher priorities are idle" logic */
2787inline_size void
2788idle_reify (EV_P)
2789{
2790 if (expect_false (idleall))
2791 {
2792 int pri;
2793
2794 for (pri = NUMPRI; pri--; )
2795 {
2796 if (pendingcnt [pri])
2797 break;
2798
2799 if (idlecnt [pri])
2800 {
2801 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2802 break;
1159 } 2803 }
1160 } 2804 }
2805 }
1161} 2806}
2807#endif
1162 2808
1163void inline_size 2809/* make timers pending */
2810inline_size void
1164timers_reify (EV_P) 2811timers_reify (EV_P)
1165{ 2812{
2813 EV_FREQUENT_CHECK;
2814
1166 while (timercnt && ((WT)timers [0])->at <= mn_now) 2815 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1167 { 2816 {
1168 ev_timer *w = timers [0]; 2817 do
1169
1170 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1171
1172 /* first reschedule or stop timer */
1173 if (w->repeat)
1174 { 2818 {
2819 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2820
2821 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2822
2823 /* first reschedule or stop timer */
2824 if (w->repeat)
2825 {
2826 ev_at (w) += w->repeat;
2827 if (ev_at (w) < mn_now)
2828 ev_at (w) = mn_now;
2829
1175 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2830 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1176 2831
1177 ((WT)w)->at += w->repeat; 2832 ANHE_at_cache (timers [HEAP0]);
1178 if (((WT)w)->at < mn_now)
1179 ((WT)w)->at = mn_now;
1180
1181 downheap ((WT *)timers, timercnt, 0); 2833 downheap (timers, timercnt, HEAP0);
2834 }
2835 else
2836 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2837
2838 EV_FREQUENT_CHECK;
2839 feed_reverse (EV_A_ (W)w);
1182 } 2840 }
1183 else 2841 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1184 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1185 2842
1186 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2843 feed_reverse_done (EV_A_ EV_TIMER);
1187 } 2844 }
1188} 2845}
1189 2846
1190#if EV_PERIODIC_ENABLE 2847#if EV_PERIODIC_ENABLE
1191void inline_size 2848
2849static void noinline
2850periodic_recalc (EV_P_ ev_periodic *w)
2851{
2852 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2853 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2854
2855 /* the above almost always errs on the low side */
2856 while (at <= ev_rt_now)
2857 {
2858 ev_tstamp nat = at + w->interval;
2859
2860 /* when resolution fails us, we use ev_rt_now */
2861 if (expect_false (nat == at))
2862 {
2863 at = ev_rt_now;
2864 break;
2865 }
2866
2867 at = nat;
2868 }
2869
2870 ev_at (w) = at;
2871}
2872
2873/* make periodics pending */
2874inline_size void
1192periodics_reify (EV_P) 2875periodics_reify (EV_P)
1193{ 2876{
2877 EV_FREQUENT_CHECK;
2878
1194 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2879 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1195 { 2880 {
1196 ev_periodic *w = periodics [0]; 2881 do
2882 {
2883 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1197 2884
1198 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2885 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1199 2886
1200 /* first reschedule or stop timer */ 2887 /* first reschedule or stop timer */
2888 if (w->reschedule_cb)
2889 {
2890 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2891
2892 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2893
2894 ANHE_at_cache (periodics [HEAP0]);
2895 downheap (periodics, periodiccnt, HEAP0);
2896 }
2897 else if (w->interval)
2898 {
2899 periodic_recalc (EV_A_ w);
2900 ANHE_at_cache (periodics [HEAP0]);
2901 downheap (periodics, periodiccnt, HEAP0);
2902 }
2903 else
2904 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2905
2906 EV_FREQUENT_CHECK;
2907 feed_reverse (EV_A_ (W)w);
2908 }
2909 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2910
2911 feed_reverse_done (EV_A_ EV_PERIODIC);
2912 }
2913}
2914
2915/* simply recalculate all periodics */
2916/* TODO: maybe ensure that at least one event happens when jumping forward? */
2917static void noinline ecb_cold
2918periodics_reschedule (EV_P)
2919{
2920 int i;
2921
2922 /* adjust periodics after time jump */
2923 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2924 {
2925 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2926
1201 if (w->reschedule_cb) 2927 if (w->reschedule_cb)
2928 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2929 else if (w->interval)
2930 periodic_recalc (EV_A_ w);
2931
2932 ANHE_at_cache (periodics [i]);
2933 }
2934
2935 reheap (periodics, periodiccnt);
2936}
2937#endif
2938
2939/* adjust all timers by a given offset */
2940static void noinline ecb_cold
2941timers_reschedule (EV_P_ ev_tstamp adjust)
2942{
2943 int i;
2944
2945 for (i = 0; i < timercnt; ++i)
2946 {
2947 ANHE *he = timers + i + HEAP0;
2948 ANHE_w (*he)->at += adjust;
2949 ANHE_at_cache (*he);
2950 }
2951}
2952
2953/* fetch new monotonic and realtime times from the kernel */
2954/* also detect if there was a timejump, and act accordingly */
2955inline_speed void
2956time_update (EV_P_ ev_tstamp max_block)
2957{
2958#if EV_USE_MONOTONIC
2959 if (expect_true (have_monotonic))
2960 {
2961 int i;
2962 ev_tstamp odiff = rtmn_diff;
2963
2964 mn_now = get_clock ();
2965
2966 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2967 /* interpolate in the meantime */
2968 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1202 { 2969 {
1203 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2970 ev_rt_now = rtmn_diff + mn_now;
1204 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2971 return;
1205 downheap ((WT *)periodics, periodiccnt, 0);
1206 } 2972 }
1207 else if (w->interval)
1208 {
1209 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1210 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1211 downheap ((WT *)periodics, periodiccnt, 0);
1212 }
1213 else
1214 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1215 2973
1216 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1217 }
1218}
1219
1220static void noinline
1221periodics_reschedule (EV_P)
1222{
1223 int i;
1224
1225 /* adjust periodics after time jump */
1226 for (i = 0; i < periodiccnt; ++i)
1227 {
1228 ev_periodic *w = periodics [i];
1229
1230 if (w->reschedule_cb)
1231 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1232 else if (w->interval)
1233 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1234 }
1235
1236 /* now rebuild the heap */
1237 for (i = periodiccnt >> 1; i--; )
1238 downheap ((WT *)periodics, periodiccnt, i);
1239}
1240#endif
1241
1242int inline_size
1243time_update_monotonic (EV_P)
1244{
1245 mn_now = get_clock ();
1246
1247 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1248 {
1249 ev_rt_now = rtmn_diff + mn_now;
1250 return 0;
1251 }
1252 else
1253 {
1254 now_floor = mn_now; 2974 now_floor = mn_now;
1255 ev_rt_now = ev_time (); 2975 ev_rt_now = ev_time ();
1256 return 1;
1257 }
1258}
1259 2976
1260void inline_size 2977 /* loop a few times, before making important decisions.
1261time_update (EV_P) 2978 * on the choice of "4": one iteration isn't enough,
1262{ 2979 * in case we get preempted during the calls to
1263 int i; 2980 * ev_time and get_clock. a second call is almost guaranteed
1264 2981 * to succeed in that case, though. and looping a few more times
1265#if EV_USE_MONOTONIC 2982 * doesn't hurt either as we only do this on time-jumps or
1266 if (expect_true (have_monotonic)) 2983 * in the unlikely event of having been preempted here.
1267 { 2984 */
1268 if (time_update_monotonic (EV_A)) 2985 for (i = 4; --i; )
1269 { 2986 {
1270 ev_tstamp odiff = rtmn_diff; 2987 ev_tstamp diff;
1271
1272 /* loop a few times, before making important decisions.
1273 * on the choice of "4": one iteration isn't enough,
1274 * in case we get preempted during the calls to
1275 * ev_time and get_clock. a second call is almost guarenteed
1276 * to succeed in that case, though. and looping a few more times
1277 * doesn't hurt either as we only do this on time-jumps or
1278 * in the unlikely event of getting preempted here.
1279 */
1280 for (i = 4; --i; )
1281 {
1282 rtmn_diff = ev_rt_now - mn_now; 2988 rtmn_diff = ev_rt_now - mn_now;
1283 2989
1284 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2990 diff = odiff - rtmn_diff;
2991
2992 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1285 return; /* all is well */ 2993 return; /* all is well */
1286 2994
1287 ev_rt_now = ev_time (); 2995 ev_rt_now = ev_time ();
1288 mn_now = get_clock (); 2996 mn_now = get_clock ();
1289 now_floor = mn_now; 2997 now_floor = mn_now;
1290 } 2998 }
1291 2999
3000 /* no timer adjustment, as the monotonic clock doesn't jump */
3001 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1292# if EV_PERIODIC_ENABLE 3002# if EV_PERIODIC_ENABLE
1293 periodics_reschedule (EV_A); 3003 periodics_reschedule (EV_A);
1294# endif 3004# endif
1295 /* no timer adjustment, as the monotonic clock doesn't jump */
1296 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1297 }
1298 } 3005 }
1299 else 3006 else
1300#endif 3007#endif
1301 { 3008 {
1302 ev_rt_now = ev_time (); 3009 ev_rt_now = ev_time ();
1303 3010
1304 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 3011 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1305 { 3012 {
3013 /* adjust timers. this is easy, as the offset is the same for all of them */
3014 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1306#if EV_PERIODIC_ENABLE 3015#if EV_PERIODIC_ENABLE
1307 periodics_reschedule (EV_A); 3016 periodics_reschedule (EV_A);
1308#endif 3017#endif
1309
1310 /* adjust timers. this is easy, as the offset is the same for all */
1311 for (i = 0; i < timercnt; ++i)
1312 ((WT)timers [i])->at += ev_rt_now - mn_now;
1313 } 3018 }
1314 3019
1315 mn_now = ev_rt_now; 3020 mn_now = ev_rt_now;
1316 } 3021 }
1317} 3022}
1318 3023
1319void 3024int
1320ev_ref (EV_P)
1321{
1322 ++activecnt;
1323}
1324
1325void
1326ev_unref (EV_P)
1327{
1328 --activecnt;
1329}
1330
1331static int loop_done;
1332
1333void
1334ev_loop (EV_P_ int flags) 3025ev_run (EV_P_ int flags)
1335{ 3026{
1336 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 3027#if EV_FEATURE_API
1337 ? EVUNLOOP_ONE 3028 ++loop_depth;
1338 : EVUNLOOP_CANCEL; 3029#endif
1339 3030
1340 while (activecnt) 3031 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3032
3033 loop_done = EVBREAK_CANCEL;
3034
3035 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3036
3037 do
1341 { 3038 {
1342 /* we might have forked, so reify kernel state if necessary */ 3039#if EV_VERIFY >= 2
3040 ev_verify (EV_A);
3041#endif
3042
3043#ifndef _WIN32
3044 if (expect_false (curpid)) /* penalise the forking check even more */
3045 if (expect_false (getpid () != curpid))
3046 {
3047 curpid = getpid ();
3048 postfork = 1;
3049 }
3050#endif
3051
1343 #if EV_FORK_ENABLE 3052#if EV_FORK_ENABLE
3053 /* we might have forked, so queue fork handlers */
1344 if (expect_false (postfork)) 3054 if (expect_false (postfork))
1345 if (forkcnt) 3055 if (forkcnt)
1346 { 3056 {
1347 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3057 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1348 call_pending (EV_A); 3058 EV_INVOKE_PENDING;
1349 } 3059 }
1350 #endif 3060#endif
1351 3061
3062#if EV_PREPARE_ENABLE
1352 /* queue check watchers (and execute them) */ 3063 /* queue prepare watchers (and execute them) */
1353 if (expect_false (preparecnt)) 3064 if (expect_false (preparecnt))
1354 { 3065 {
1355 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3066 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1356 call_pending (EV_A); 3067 EV_INVOKE_PENDING;
1357 } 3068 }
3069#endif
3070
3071 if (expect_false (loop_done))
3072 break;
1358 3073
1359 /* we might have forked, so reify kernel state if necessary */ 3074 /* we might have forked, so reify kernel state if necessary */
1360 if (expect_false (postfork)) 3075 if (expect_false (postfork))
1361 loop_fork (EV_A); 3076 loop_fork (EV_A);
1362 3077
1363 /* update fd-related kernel structures */ 3078 /* update fd-related kernel structures */
1364 fd_reify (EV_A); 3079 fd_reify (EV_A);
1365 3080
1366 /* calculate blocking time */ 3081 /* calculate blocking time */
1367 { 3082 {
1368 double block; 3083 ev_tstamp waittime = 0.;
3084 ev_tstamp sleeptime = 0.;
1369 3085
1370 if (flags & EVLOOP_NONBLOCK || idlecnt) 3086 /* remember old timestamp for io_blocktime calculation */
1371 block = 0.; /* do not block at all */ 3087 ev_tstamp prev_mn_now = mn_now;
1372 else 3088
3089 /* update time to cancel out callback processing overhead */
3090 time_update (EV_A_ 1e100);
3091
3092 /* from now on, we want a pipe-wake-up */
3093 pipe_write_wanted = 1;
3094
3095 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3096
3097 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1373 { 3098 {
1374 /* update time to cancel out callback processing overhead */
1375#if EV_USE_MONOTONIC
1376 if (expect_true (have_monotonic))
1377 time_update_monotonic (EV_A);
1378 else
1379#endif
1380 {
1381 ev_rt_now = ev_time ();
1382 mn_now = ev_rt_now;
1383 }
1384
1385 block = MAX_BLOCKTIME; 3099 waittime = MAX_BLOCKTIME;
1386 3100
1387 if (timercnt) 3101 if (timercnt)
1388 { 3102 {
1389 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3103 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1390 if (block > to) block = to; 3104 if (waittime > to) waittime = to;
1391 } 3105 }
1392 3106
1393#if EV_PERIODIC_ENABLE 3107#if EV_PERIODIC_ENABLE
1394 if (periodiccnt) 3108 if (periodiccnt)
1395 { 3109 {
1396 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3110 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1397 if (block > to) block = to; 3111 if (waittime > to) waittime = to;
1398 } 3112 }
1399#endif 3113#endif
1400 3114
3115 /* don't let timeouts decrease the waittime below timeout_blocktime */
3116 if (expect_false (waittime < timeout_blocktime))
3117 waittime = timeout_blocktime;
3118
3119 /* at this point, we NEED to wait, so we have to ensure */
3120 /* to pass a minimum nonzero value to the backend */
3121 if (expect_false (waittime < backend_mintime))
3122 waittime = backend_mintime;
3123
3124 /* extra check because io_blocktime is commonly 0 */
1401 if (expect_false (block < 0.)) block = 0.; 3125 if (expect_false (io_blocktime))
3126 {
3127 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3128
3129 if (sleeptime > waittime - backend_mintime)
3130 sleeptime = waittime - backend_mintime;
3131
3132 if (expect_true (sleeptime > 0.))
3133 {
3134 ev_sleep (sleeptime);
3135 waittime -= sleeptime;
3136 }
3137 }
1402 } 3138 }
1403 3139
3140#if EV_FEATURE_API
3141 ++loop_count;
3142#endif
3143 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1404 backend_poll (EV_A_ block); 3144 backend_poll (EV_A_ waittime);
3145 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3146
3147 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3148
3149 ECB_MEMORY_FENCE_ACQUIRE;
3150 if (pipe_write_skipped)
3151 {
3152 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3153 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3154 }
3155
3156
3157 /* update ev_rt_now, do magic */
3158 time_update (EV_A_ waittime + sleeptime);
1405 } 3159 }
1406
1407 /* update ev_rt_now, do magic */
1408 time_update (EV_A);
1409 3160
1410 /* queue pending timers and reschedule them */ 3161 /* queue pending timers and reschedule them */
1411 timers_reify (EV_A); /* relative timers called last */ 3162 timers_reify (EV_A); /* relative timers called last */
1412#if EV_PERIODIC_ENABLE 3163#if EV_PERIODIC_ENABLE
1413 periodics_reify (EV_A); /* absolute timers called first */ 3164 periodics_reify (EV_A); /* absolute timers called first */
1414#endif 3165#endif
1415 3166
3167#if EV_IDLE_ENABLE
1416 /* queue idle watchers unless other events are pending */ 3168 /* queue idle watchers unless other events are pending */
1417 if (idlecnt && !any_pending (EV_A)) 3169 idle_reify (EV_A);
1418 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3170#endif
1419 3171
3172#if EV_CHECK_ENABLE
1420 /* queue check watchers, to be executed first */ 3173 /* queue check watchers, to be executed first */
1421 if (expect_false (checkcnt)) 3174 if (expect_false (checkcnt))
1422 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3175 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3176#endif
1423 3177
1424 call_pending (EV_A); 3178 EV_INVOKE_PENDING;
1425
1426 if (expect_false (loop_done))
1427 break;
1428 } 3179 }
3180 while (expect_true (
3181 activecnt
3182 && !loop_done
3183 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3184 ));
1429 3185
1430 if (loop_done == EVUNLOOP_ONE) 3186 if (loop_done == EVBREAK_ONE)
1431 loop_done = EVUNLOOP_CANCEL; 3187 loop_done = EVBREAK_CANCEL;
3188
3189#if EV_FEATURE_API
3190 --loop_depth;
3191#endif
3192
3193 return activecnt;
1432} 3194}
1433 3195
1434void 3196void
1435ev_unloop (EV_P_ int how) 3197ev_break (EV_P_ int how) EV_THROW
1436{ 3198{
1437 loop_done = how; 3199 loop_done = how;
1438} 3200}
1439 3201
3202void
3203ev_ref (EV_P) EV_THROW
3204{
3205 ++activecnt;
3206}
3207
3208void
3209ev_unref (EV_P) EV_THROW
3210{
3211 --activecnt;
3212}
3213
3214void
3215ev_now_update (EV_P) EV_THROW
3216{
3217 time_update (EV_A_ 1e100);
3218}
3219
3220void
3221ev_suspend (EV_P) EV_THROW
3222{
3223 ev_now_update (EV_A);
3224}
3225
3226void
3227ev_resume (EV_P) EV_THROW
3228{
3229 ev_tstamp mn_prev = mn_now;
3230
3231 ev_now_update (EV_A);
3232 timers_reschedule (EV_A_ mn_now - mn_prev);
3233#if EV_PERIODIC_ENABLE
3234 /* TODO: really do this? */
3235 periodics_reschedule (EV_A);
3236#endif
3237}
3238
1440/*****************************************************************************/ 3239/*****************************************************************************/
3240/* singly-linked list management, used when the expected list length is short */
1441 3241
1442void inline_size 3242inline_size void
1443wlist_add (WL *head, WL elem) 3243wlist_add (WL *head, WL elem)
1444{ 3244{
1445 elem->next = *head; 3245 elem->next = *head;
1446 *head = elem; 3246 *head = elem;
1447} 3247}
1448 3248
1449void inline_size 3249inline_size void
1450wlist_del (WL *head, WL elem) 3250wlist_del (WL *head, WL elem)
1451{ 3251{
1452 while (*head) 3252 while (*head)
1453 { 3253 {
1454 if (*head == elem) 3254 if (expect_true (*head == elem))
1455 { 3255 {
1456 *head = elem->next; 3256 *head = elem->next;
1457 return; 3257 break;
1458 } 3258 }
1459 3259
1460 head = &(*head)->next; 3260 head = &(*head)->next;
1461 } 3261 }
1462} 3262}
1463 3263
1464void inline_speed 3264/* internal, faster, version of ev_clear_pending */
3265inline_speed void
1465ev_clear_pending (EV_P_ W w) 3266clear_pending (EV_P_ W w)
1466{ 3267{
1467 if (w->pending) 3268 if (w->pending)
1468 { 3269 {
1469 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3270 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1470 w->pending = 0; 3271 w->pending = 0;
1471 } 3272 }
1472} 3273}
1473 3274
1474void inline_speed 3275int
3276ev_clear_pending (EV_P_ void *w) EV_THROW
3277{
3278 W w_ = (W)w;
3279 int pending = w_->pending;
3280
3281 if (expect_true (pending))
3282 {
3283 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3284 p->w = (W)&pending_w;
3285 w_->pending = 0;
3286 return p->events;
3287 }
3288 else
3289 return 0;
3290}
3291
3292inline_size void
3293pri_adjust (EV_P_ W w)
3294{
3295 int pri = ev_priority (w);
3296 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3297 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3298 ev_set_priority (w, pri);
3299}
3300
3301inline_speed void
1475ev_start (EV_P_ W w, int active) 3302ev_start (EV_P_ W w, int active)
1476{ 3303{
1477 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3304 pri_adjust (EV_A_ w);
1478 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1479
1480 w->active = active; 3305 w->active = active;
1481 ev_ref (EV_A); 3306 ev_ref (EV_A);
1482} 3307}
1483 3308
1484void inline_size 3309inline_size void
1485ev_stop (EV_P_ W w) 3310ev_stop (EV_P_ W w)
1486{ 3311{
1487 ev_unref (EV_A); 3312 ev_unref (EV_A);
1488 w->active = 0; 3313 w->active = 0;
1489} 3314}
1490 3315
1491/*****************************************************************************/ 3316/*****************************************************************************/
1492 3317
1493void 3318void noinline
1494ev_io_start (EV_P_ ev_io *w) 3319ev_io_start (EV_P_ ev_io *w) EV_THROW
1495{ 3320{
1496 int fd = w->fd; 3321 int fd = w->fd;
1497 3322
1498 if (expect_false (ev_is_active (w))) 3323 if (expect_false (ev_is_active (w)))
1499 return; 3324 return;
1500 3325
1501 assert (("ev_io_start called with negative fd", fd >= 0)); 3326 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3327 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3328
3329 EV_FREQUENT_CHECK;
1502 3330
1503 ev_start (EV_A_ (W)w, 1); 3331 ev_start (EV_A_ (W)w, 1);
1504 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3332 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1505 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3333 wlist_add (&anfds[fd].head, (WL)w);
1506 3334
1507 fd_change (EV_A_ fd); 3335 /* common bug, apparently */
1508} 3336 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
1509 3337
1510void 3338 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3339 w->events &= ~EV__IOFDSET;
3340
3341 EV_FREQUENT_CHECK;
3342}
3343
3344void noinline
1511ev_io_stop (EV_P_ ev_io *w) 3345ev_io_stop (EV_P_ ev_io *w) EV_THROW
1512{ 3346{
1513 ev_clear_pending (EV_A_ (W)w); 3347 clear_pending (EV_A_ (W)w);
1514 if (expect_false (!ev_is_active (w))) 3348 if (expect_false (!ev_is_active (w)))
1515 return; 3349 return;
1516 3350
1517 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3351 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1518 3352
3353 EV_FREQUENT_CHECK;
3354
1519 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3355 wlist_del (&anfds[w->fd].head, (WL)w);
1520 ev_stop (EV_A_ (W)w); 3356 ev_stop (EV_A_ (W)w);
1521 3357
1522 fd_change (EV_A_ w->fd); 3358 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1523}
1524 3359
1525void 3360 EV_FREQUENT_CHECK;
3361}
3362
3363void noinline
1526ev_timer_start (EV_P_ ev_timer *w) 3364ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1527{ 3365{
1528 if (expect_false (ev_is_active (w))) 3366 if (expect_false (ev_is_active (w)))
1529 return; 3367 return;
1530 3368
1531 ((WT)w)->at += mn_now; 3369 ev_at (w) += mn_now;
1532 3370
1533 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3371 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1534 3372
3373 EV_FREQUENT_CHECK;
3374
3375 ++timercnt;
1535 ev_start (EV_A_ (W)w, ++timercnt); 3376 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1536 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 3377 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1537 timers [timercnt - 1] = w; 3378 ANHE_w (timers [ev_active (w)]) = (WT)w;
1538 upheap ((WT *)timers, timercnt - 1); 3379 ANHE_at_cache (timers [ev_active (w)]);
3380 upheap (timers, ev_active (w));
1539 3381
3382 EV_FREQUENT_CHECK;
3383
1540 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3384 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1541} 3385}
1542 3386
1543void 3387void noinline
1544ev_timer_stop (EV_P_ ev_timer *w) 3388ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1545{ 3389{
1546 ev_clear_pending (EV_A_ (W)w); 3390 clear_pending (EV_A_ (W)w);
1547 if (expect_false (!ev_is_active (w))) 3391 if (expect_false (!ev_is_active (w)))
1548 return; 3392 return;
1549 3393
1550 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3394 EV_FREQUENT_CHECK;
1551 3395
1552 { 3396 {
1553 int active = ((W)w)->active; 3397 int active = ev_active (w);
1554 3398
3399 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3400
3401 --timercnt;
3402
1555 if (expect_true (--active < --timercnt)) 3403 if (expect_true (active < timercnt + HEAP0))
1556 { 3404 {
1557 timers [active] = timers [timercnt]; 3405 timers [active] = timers [timercnt + HEAP0];
1558 adjustheap ((WT *)timers, timercnt, active); 3406 adjustheap (timers, timercnt, active);
1559 } 3407 }
1560 } 3408 }
1561 3409
1562 ((WT)w)->at -= mn_now; 3410 ev_at (w) -= mn_now;
1563 3411
1564 ev_stop (EV_A_ (W)w); 3412 ev_stop (EV_A_ (W)w);
1565}
1566 3413
1567void 3414 EV_FREQUENT_CHECK;
3415}
3416
3417void noinline
1568ev_timer_again (EV_P_ ev_timer *w) 3418ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1569{ 3419{
3420 EV_FREQUENT_CHECK;
3421
3422 clear_pending (EV_A_ (W)w);
3423
1570 if (ev_is_active (w)) 3424 if (ev_is_active (w))
1571 { 3425 {
1572 if (w->repeat) 3426 if (w->repeat)
1573 { 3427 {
1574 ((WT)w)->at = mn_now + w->repeat; 3428 ev_at (w) = mn_now + w->repeat;
3429 ANHE_at_cache (timers [ev_active (w)]);
1575 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3430 adjustheap (timers, timercnt, ev_active (w));
1576 } 3431 }
1577 else 3432 else
1578 ev_timer_stop (EV_A_ w); 3433 ev_timer_stop (EV_A_ w);
1579 } 3434 }
1580 else if (w->repeat) 3435 else if (w->repeat)
1581 { 3436 {
1582 w->at = w->repeat; 3437 ev_at (w) = w->repeat;
1583 ev_timer_start (EV_A_ w); 3438 ev_timer_start (EV_A_ w);
1584 } 3439 }
3440
3441 EV_FREQUENT_CHECK;
3442}
3443
3444ev_tstamp
3445ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3446{
3447 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1585} 3448}
1586 3449
1587#if EV_PERIODIC_ENABLE 3450#if EV_PERIODIC_ENABLE
1588void 3451void noinline
1589ev_periodic_start (EV_P_ ev_periodic *w) 3452ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1590{ 3453{
1591 if (expect_false (ev_is_active (w))) 3454 if (expect_false (ev_is_active (w)))
1592 return; 3455 return;
1593 3456
1594 if (w->reschedule_cb) 3457 if (w->reschedule_cb)
1595 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3458 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1596 else if (w->interval) 3459 else if (w->interval)
1597 { 3460 {
1598 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3461 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1599 /* this formula differs from the one in periodic_reify because we do not always round up */ 3462 periodic_recalc (EV_A_ w);
1600 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1601 } 3463 }
3464 else
3465 ev_at (w) = w->offset;
1602 3466
3467 EV_FREQUENT_CHECK;
3468
3469 ++periodiccnt;
1603 ev_start (EV_A_ (W)w, ++periodiccnt); 3470 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1604 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3471 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1605 periodics [periodiccnt - 1] = w; 3472 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1606 upheap ((WT *)periodics, periodiccnt - 1); 3473 ANHE_at_cache (periodics [ev_active (w)]);
3474 upheap (periodics, ev_active (w));
1607 3475
3476 EV_FREQUENT_CHECK;
3477
1608 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3478 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1609} 3479}
1610 3480
1611void 3481void noinline
1612ev_periodic_stop (EV_P_ ev_periodic *w) 3482ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1613{ 3483{
1614 ev_clear_pending (EV_A_ (W)w); 3484 clear_pending (EV_A_ (W)w);
1615 if (expect_false (!ev_is_active (w))) 3485 if (expect_false (!ev_is_active (w)))
1616 return; 3486 return;
1617 3487
1618 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3488 EV_FREQUENT_CHECK;
1619 3489
1620 { 3490 {
1621 int active = ((W)w)->active; 3491 int active = ev_active (w);
1622 3492
3493 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3494
3495 --periodiccnt;
3496
1623 if (expect_true (--active < --periodiccnt)) 3497 if (expect_true (active < periodiccnt + HEAP0))
1624 { 3498 {
1625 periodics [active] = periodics [periodiccnt]; 3499 periodics [active] = periodics [periodiccnt + HEAP0];
1626 adjustheap ((WT *)periodics, periodiccnt, active); 3500 adjustheap (periodics, periodiccnt, active);
1627 } 3501 }
1628 } 3502 }
1629 3503
1630 ev_stop (EV_A_ (W)w); 3504 ev_stop (EV_A_ (W)w);
1631}
1632 3505
1633void 3506 EV_FREQUENT_CHECK;
3507}
3508
3509void noinline
1634ev_periodic_again (EV_P_ ev_periodic *w) 3510ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1635{ 3511{
1636 /* TODO: use adjustheap and recalculation */ 3512 /* TODO: use adjustheap and recalculation */
1637 ev_periodic_stop (EV_A_ w); 3513 ev_periodic_stop (EV_A_ w);
1638 ev_periodic_start (EV_A_ w); 3514 ev_periodic_start (EV_A_ w);
1639} 3515}
… …
1641 3517
1642#ifndef SA_RESTART 3518#ifndef SA_RESTART
1643# define SA_RESTART 0 3519# define SA_RESTART 0
1644#endif 3520#endif
1645 3521
1646void 3522#if EV_SIGNAL_ENABLE
3523
3524void noinline
1647ev_signal_start (EV_P_ ev_signal *w) 3525ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1648{ 3526{
1649#if EV_MULTIPLICITY
1650 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1651#endif
1652 if (expect_false (ev_is_active (w))) 3527 if (expect_false (ev_is_active (w)))
1653 return; 3528 return;
1654 3529
1655 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3530 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3531
3532#if EV_MULTIPLICITY
3533 assert (("libev: a signal must not be attached to two different loops",
3534 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3535
3536 signals [w->signum - 1].loop = EV_A;
3537#endif
3538
3539 EV_FREQUENT_CHECK;
3540
3541#if EV_USE_SIGNALFD
3542 if (sigfd == -2)
3543 {
3544 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3545 if (sigfd < 0 && errno == EINVAL)
3546 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3547
3548 if (sigfd >= 0)
3549 {
3550 fd_intern (sigfd); /* doing it twice will not hurt */
3551
3552 sigemptyset (&sigfd_set);
3553
3554 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3555 ev_set_priority (&sigfd_w, EV_MAXPRI);
3556 ev_io_start (EV_A_ &sigfd_w);
3557 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3558 }
3559 }
3560
3561 if (sigfd >= 0)
3562 {
3563 /* TODO: check .head */
3564 sigaddset (&sigfd_set, w->signum);
3565 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3566
3567 signalfd (sigfd, &sigfd_set, 0);
3568 }
3569#endif
1656 3570
1657 ev_start (EV_A_ (W)w, 1); 3571 ev_start (EV_A_ (W)w, 1);
1658 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1659 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3572 wlist_add (&signals [w->signum - 1].head, (WL)w);
1660 3573
1661 if (!((WL)w)->next) 3574 if (!((WL)w)->next)
3575# if EV_USE_SIGNALFD
3576 if (sigfd < 0) /*TODO*/
3577# endif
1662 { 3578 {
1663#if _WIN32 3579# ifdef _WIN32
3580 evpipe_init (EV_A);
3581
1664 signal (w->signum, sighandler); 3582 signal (w->signum, ev_sighandler);
1665#else 3583# else
1666 struct sigaction sa; 3584 struct sigaction sa;
3585
3586 evpipe_init (EV_A);
3587
1667 sa.sa_handler = sighandler; 3588 sa.sa_handler = ev_sighandler;
1668 sigfillset (&sa.sa_mask); 3589 sigfillset (&sa.sa_mask);
1669 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3590 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1670 sigaction (w->signum, &sa, 0); 3591 sigaction (w->signum, &sa, 0);
3592
3593 if (origflags & EVFLAG_NOSIGMASK)
3594 {
3595 sigemptyset (&sa.sa_mask);
3596 sigaddset (&sa.sa_mask, w->signum);
3597 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3598 }
1671#endif 3599#endif
1672 } 3600 }
1673}
1674 3601
1675void 3602 EV_FREQUENT_CHECK;
3603}
3604
3605void noinline
1676ev_signal_stop (EV_P_ ev_signal *w) 3606ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1677{ 3607{
1678 ev_clear_pending (EV_A_ (W)w); 3608 clear_pending (EV_A_ (W)w);
1679 if (expect_false (!ev_is_active (w))) 3609 if (expect_false (!ev_is_active (w)))
1680 return; 3610 return;
1681 3611
3612 EV_FREQUENT_CHECK;
3613
1682 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3614 wlist_del (&signals [w->signum - 1].head, (WL)w);
1683 ev_stop (EV_A_ (W)w); 3615 ev_stop (EV_A_ (W)w);
1684 3616
1685 if (!signals [w->signum - 1].head) 3617 if (!signals [w->signum - 1].head)
3618 {
3619#if EV_MULTIPLICITY
3620 signals [w->signum - 1].loop = 0; /* unattach from signal */
3621#endif
3622#if EV_USE_SIGNALFD
3623 if (sigfd >= 0)
3624 {
3625 sigset_t ss;
3626
3627 sigemptyset (&ss);
3628 sigaddset (&ss, w->signum);
3629 sigdelset (&sigfd_set, w->signum);
3630
3631 signalfd (sigfd, &sigfd_set, 0);
3632 sigprocmask (SIG_UNBLOCK, &ss, 0);
3633 }
3634 else
3635#endif
1686 signal (w->signum, SIG_DFL); 3636 signal (w->signum, SIG_DFL);
3637 }
3638
3639 EV_FREQUENT_CHECK;
1687} 3640}
3641
3642#endif
3643
3644#if EV_CHILD_ENABLE
1688 3645
1689void 3646void
1690ev_child_start (EV_P_ ev_child *w) 3647ev_child_start (EV_P_ ev_child *w) EV_THROW
1691{ 3648{
1692#if EV_MULTIPLICITY 3649#if EV_MULTIPLICITY
1693 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3650 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1694#endif 3651#endif
1695 if (expect_false (ev_is_active (w))) 3652 if (expect_false (ev_is_active (w)))
1696 return; 3653 return;
1697 3654
3655 EV_FREQUENT_CHECK;
3656
1698 ev_start (EV_A_ (W)w, 1); 3657 ev_start (EV_A_ (W)w, 1);
1699 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3658 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3659
3660 EV_FREQUENT_CHECK;
1700} 3661}
1701 3662
1702void 3663void
1703ev_child_stop (EV_P_ ev_child *w) 3664ev_child_stop (EV_P_ ev_child *w) EV_THROW
1704{ 3665{
1705 ev_clear_pending (EV_A_ (W)w); 3666 clear_pending (EV_A_ (W)w);
1706 if (expect_false (!ev_is_active (w))) 3667 if (expect_false (!ev_is_active (w)))
1707 return; 3668 return;
1708 3669
3670 EV_FREQUENT_CHECK;
3671
1709 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3672 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1710 ev_stop (EV_A_ (W)w); 3673 ev_stop (EV_A_ (W)w);
3674
3675 EV_FREQUENT_CHECK;
1711} 3676}
3677
3678#endif
1712 3679
1713#if EV_STAT_ENABLE 3680#if EV_STAT_ENABLE
1714 3681
1715# ifdef _WIN32 3682# ifdef _WIN32
1716# undef lstat 3683# undef lstat
1717# define lstat(a,b) _stati64 (a,b) 3684# define lstat(a,b) _stati64 (a,b)
1718# endif 3685# endif
1719 3686
1720#define DEF_STAT_INTERVAL 5.0074891 3687#define DEF_STAT_INTERVAL 5.0074891
3688#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1721#define MIN_STAT_INTERVAL 0.1074891 3689#define MIN_STAT_INTERVAL 0.1074891
1722 3690
1723void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3691static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1724 3692
1725#if EV_USE_INOTIFY 3693#if EV_USE_INOTIFY
1726# define EV_INOTIFY_BUFSIZE 8192 3694
3695/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3696# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1727 3697
1728static void noinline 3698static void noinline
1729infy_add (EV_P_ ev_stat *w) 3699infy_add (EV_P_ ev_stat *w)
1730{ 3700{
1731 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); 3701 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);
1732 3702
1733 if (w->wd < 0) 3703 if (w->wd >= 0)
3704 {
3705 struct statfs sfs;
3706
3707 /* now local changes will be tracked by inotify, but remote changes won't */
3708 /* unless the filesystem is known to be local, we therefore still poll */
3709 /* also do poll on <2.6.25, but with normal frequency */
3710
3711 if (!fs_2625)
3712 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3713 else if (!statfs (w->path, &sfs)
3714 && (sfs.f_type == 0x1373 /* devfs */
3715 || sfs.f_type == 0xEF53 /* ext2/3 */
3716 || sfs.f_type == 0x3153464a /* jfs */
3717 || sfs.f_type == 0x52654973 /* reiser3 */
3718 || sfs.f_type == 0x01021994 /* tempfs */
3719 || sfs.f_type == 0x58465342 /* xfs */))
3720 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3721 else
3722 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1734 { 3723 }
1735 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3724 else
3725 {
3726 /* can't use inotify, continue to stat */
3727 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1736 3728
1737 /* monitor some parent directory for speedup hints */ 3729 /* if path is not there, monitor some parent directory for speedup hints */
3730 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3731 /* but an efficiency issue only */
1738 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3732 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1739 { 3733 {
1740 char path [4096]; 3734 char path [4096];
1741 strcpy (path, w->path); 3735 strcpy (path, w->path);
1742 3736
… …
1745 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3739 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1746 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3740 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1747 3741
1748 char *pend = strrchr (path, '/'); 3742 char *pend = strrchr (path, '/');
1749 3743
1750 if (!pend) 3744 if (!pend || pend == path)
1751 break; /* whoops, no '/', complain to your admin */ 3745 break;
1752 3746
1753 *pend = 0; 3747 *pend = 0;
1754 w->wd = inotify_add_watch (fs_fd, path, mask); 3748 w->wd = inotify_add_watch (fs_fd, path, mask);
1755 } 3749 }
1756 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3750 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1757 } 3751 }
1758 } 3752 }
1759 else
1760 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1761 3753
1762 if (w->wd >= 0) 3754 if (w->wd >= 0)
1763 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3755 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3756
3757 /* now re-arm timer, if required */
3758 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3759 ev_timer_again (EV_A_ &w->timer);
3760 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1764} 3761}
1765 3762
1766static void noinline 3763static void noinline
1767infy_del (EV_P_ ev_stat *w) 3764infy_del (EV_P_ ev_stat *w)
1768{ 3765{
… …
1771 3768
1772 if (wd < 0) 3769 if (wd < 0)
1773 return; 3770 return;
1774 3771
1775 w->wd = -2; 3772 w->wd = -2;
1776 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3773 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1777 wlist_del (&fs_hash [slot].head, (WL)w); 3774 wlist_del (&fs_hash [slot].head, (WL)w);
1778 3775
1779 /* remove this watcher, if others are watching it, they will rearm */ 3776 /* remove this watcher, if others are watching it, they will rearm */
1780 inotify_rm_watch (fs_fd, wd); 3777 inotify_rm_watch (fs_fd, wd);
1781} 3778}
1782 3779
1783static void noinline 3780static void noinline
1784infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3781infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1785{ 3782{
1786 if (slot < 0) 3783 if (slot < 0)
1787 /* overflow, need to check for all hahs slots */ 3784 /* overflow, need to check for all hash slots */
1788 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3785 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1789 infy_wd (EV_A_ slot, wd, ev); 3786 infy_wd (EV_A_ slot, wd, ev);
1790 else 3787 else
1791 { 3788 {
1792 WL w_; 3789 WL w_;
1793 3790
1794 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3791 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1795 { 3792 {
1796 ev_stat *w = (ev_stat *)w_; 3793 ev_stat *w = (ev_stat *)w_;
1797 w_ = w_->next; /* lets us remove this watcher and all before it */ 3794 w_ = w_->next; /* lets us remove this watcher and all before it */
1798 3795
1799 if (w->wd == wd || wd == -1) 3796 if (w->wd == wd || wd == -1)
1800 { 3797 {
1801 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3798 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1802 { 3799 {
3800 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1803 w->wd = -1; 3801 w->wd = -1;
1804 infy_add (EV_A_ w); /* re-add, no matter what */ 3802 infy_add (EV_A_ w); /* re-add, no matter what */
1805 } 3803 }
1806 3804
1807 stat_timer_cb (EV_A_ &w->timer, 0); 3805 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1812 3810
1813static void 3811static void
1814infy_cb (EV_P_ ev_io *w, int revents) 3812infy_cb (EV_P_ ev_io *w, int revents)
1815{ 3813{
1816 char buf [EV_INOTIFY_BUFSIZE]; 3814 char buf [EV_INOTIFY_BUFSIZE];
1817 struct inotify_event *ev = (struct inotify_event *)buf;
1818 int ofs; 3815 int ofs;
1819 int len = read (fs_fd, buf, sizeof (buf)); 3816 int len = read (fs_fd, buf, sizeof (buf));
1820 3817
1821 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3818 for (ofs = 0; ofs < len; )
3819 {
3820 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1822 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3821 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3822 ofs += sizeof (struct inotify_event) + ev->len;
3823 }
1823} 3824}
1824 3825
1825void inline_size 3826inline_size void ecb_cold
3827ev_check_2625 (EV_P)
3828{
3829 /* kernels < 2.6.25 are borked
3830 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3831 */
3832 if (ev_linux_version () < 0x020619)
3833 return;
3834
3835 fs_2625 = 1;
3836}
3837
3838inline_size int
3839infy_newfd (void)
3840{
3841#if defined IN_CLOEXEC && defined IN_NONBLOCK
3842 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3843 if (fd >= 0)
3844 return fd;
3845#endif
3846 return inotify_init ();
3847}
3848
3849inline_size void
1826infy_init (EV_P) 3850infy_init (EV_P)
1827{ 3851{
1828 if (fs_fd != -2) 3852 if (fs_fd != -2)
1829 return; 3853 return;
1830 3854
3855 fs_fd = -1;
3856
3857 ev_check_2625 (EV_A);
3858
1831 fs_fd = inotify_init (); 3859 fs_fd = infy_newfd ();
1832 3860
1833 if (fs_fd >= 0) 3861 if (fs_fd >= 0)
1834 { 3862 {
3863 fd_intern (fs_fd);
1835 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3864 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1836 ev_set_priority (&fs_w, EV_MAXPRI); 3865 ev_set_priority (&fs_w, EV_MAXPRI);
1837 ev_io_start (EV_A_ &fs_w); 3866 ev_io_start (EV_A_ &fs_w);
3867 ev_unref (EV_A);
1838 } 3868 }
1839} 3869}
1840 3870
1841void inline_size 3871inline_size void
1842infy_fork (EV_P) 3872infy_fork (EV_P)
1843{ 3873{
1844 int slot; 3874 int slot;
1845 3875
1846 if (fs_fd < 0) 3876 if (fs_fd < 0)
1847 return; 3877 return;
1848 3878
3879 ev_ref (EV_A);
3880 ev_io_stop (EV_A_ &fs_w);
1849 close (fs_fd); 3881 close (fs_fd);
1850 fs_fd = inotify_init (); 3882 fs_fd = infy_newfd ();
1851 3883
3884 if (fs_fd >= 0)
3885 {
3886 fd_intern (fs_fd);
3887 ev_io_set (&fs_w, fs_fd, EV_READ);
3888 ev_io_start (EV_A_ &fs_w);
3889 ev_unref (EV_A);
3890 }
3891
1852 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3892 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1853 { 3893 {
1854 WL w_ = fs_hash [slot].head; 3894 WL w_ = fs_hash [slot].head;
1855 fs_hash [slot].head = 0; 3895 fs_hash [slot].head = 0;
1856 3896
1857 while (w_) 3897 while (w_)
… …
1862 w->wd = -1; 3902 w->wd = -1;
1863 3903
1864 if (fs_fd >= 0) 3904 if (fs_fd >= 0)
1865 infy_add (EV_A_ w); /* re-add, no matter what */ 3905 infy_add (EV_A_ w); /* re-add, no matter what */
1866 else 3906 else
3907 {
3908 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3909 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1867 ev_timer_start (EV_A_ &w->timer); 3910 ev_timer_again (EV_A_ &w->timer);
3911 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3912 }
1868 } 3913 }
1869
1870 } 3914 }
1871} 3915}
1872 3916
3917#endif
3918
3919#ifdef _WIN32
3920# define EV_LSTAT(p,b) _stati64 (p, b)
3921#else
3922# define EV_LSTAT(p,b) lstat (p, b)
1873#endif 3923#endif
1874 3924
1875void 3925void
1876ev_stat_stat (EV_P_ ev_stat *w) 3926ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1877{ 3927{
1878 if (lstat (w->path, &w->attr) < 0) 3928 if (lstat (w->path, &w->attr) < 0)
1879 w->attr.st_nlink = 0; 3929 w->attr.st_nlink = 0;
1880 else if (!w->attr.st_nlink) 3930 else if (!w->attr.st_nlink)
1881 w->attr.st_nlink = 1; 3931 w->attr.st_nlink = 1;
1882} 3932}
1883 3933
1884void noinline 3934static void noinline
1885stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3935stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1886{ 3936{
1887 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3937 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1888 3938
1889 /* we copy this here each the time so that */ 3939 ev_statdata prev = w->attr;
1890 /* prev has the old value when the callback gets invoked */
1891 w->prev = w->attr;
1892 ev_stat_stat (EV_A_ w); 3940 ev_stat_stat (EV_A_ w);
1893 3941
1894 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3942 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1895 if ( 3943 if (
1896 w->prev.st_dev != w->attr.st_dev 3944 prev.st_dev != w->attr.st_dev
1897 || w->prev.st_ino != w->attr.st_ino 3945 || prev.st_ino != w->attr.st_ino
1898 || w->prev.st_mode != w->attr.st_mode 3946 || prev.st_mode != w->attr.st_mode
1899 || w->prev.st_nlink != w->attr.st_nlink 3947 || prev.st_nlink != w->attr.st_nlink
1900 || w->prev.st_uid != w->attr.st_uid 3948 || prev.st_uid != w->attr.st_uid
1901 || w->prev.st_gid != w->attr.st_gid 3949 || prev.st_gid != w->attr.st_gid
1902 || w->prev.st_rdev != w->attr.st_rdev 3950 || prev.st_rdev != w->attr.st_rdev
1903 || w->prev.st_size != w->attr.st_size 3951 || prev.st_size != w->attr.st_size
1904 || w->prev.st_atime != w->attr.st_atime 3952 || prev.st_atime != w->attr.st_atime
1905 || w->prev.st_mtime != w->attr.st_mtime 3953 || prev.st_mtime != w->attr.st_mtime
1906 || w->prev.st_ctime != w->attr.st_ctime 3954 || prev.st_ctime != w->attr.st_ctime
1907 ) { 3955 ) {
3956 /* we only update w->prev on actual differences */
3957 /* in case we test more often than invoke the callback, */
3958 /* to ensure that prev is always different to attr */
3959 w->prev = prev;
3960
1908 #if EV_USE_INOTIFY 3961 #if EV_USE_INOTIFY
3962 if (fs_fd >= 0)
3963 {
1909 infy_del (EV_A_ w); 3964 infy_del (EV_A_ w);
1910 infy_add (EV_A_ w); 3965 infy_add (EV_A_ w);
1911 ev_stat_stat (EV_A_ w); /* avoid race... */ 3966 ev_stat_stat (EV_A_ w); /* avoid race... */
3967 }
1912 #endif 3968 #endif
1913 3969
1914 ev_feed_event (EV_A_ w, EV_STAT); 3970 ev_feed_event (EV_A_ w, EV_STAT);
1915 } 3971 }
1916} 3972}
1917 3973
1918void 3974void
1919ev_stat_start (EV_P_ ev_stat *w) 3975ev_stat_start (EV_P_ ev_stat *w) EV_THROW
1920{ 3976{
1921 if (expect_false (ev_is_active (w))) 3977 if (expect_false (ev_is_active (w)))
1922 return; 3978 return;
1923 3979
1924 /* since we use memcmp, we need to clear any padding data etc. */
1925 memset (&w->prev, 0, sizeof (ev_statdata));
1926 memset (&w->attr, 0, sizeof (ev_statdata));
1927
1928 ev_stat_stat (EV_A_ w); 3980 ev_stat_stat (EV_A_ w);
1929 3981
3982 if (w->interval < MIN_STAT_INTERVAL && w->interval)
1930 if (w->interval < MIN_STAT_INTERVAL) 3983 w->interval = MIN_STAT_INTERVAL;
1931 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1932 3984
1933 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3985 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
1934 ev_set_priority (&w->timer, ev_priority (w)); 3986 ev_set_priority (&w->timer, ev_priority (w));
1935 3987
1936#if EV_USE_INOTIFY 3988#if EV_USE_INOTIFY
1937 infy_init (EV_A); 3989 infy_init (EV_A);
1938 3990
1939 if (fs_fd >= 0) 3991 if (fs_fd >= 0)
1940 infy_add (EV_A_ w); 3992 infy_add (EV_A_ w);
1941 else 3993 else
1942#endif 3994#endif
3995 {
1943 ev_timer_start (EV_A_ &w->timer); 3996 ev_timer_again (EV_A_ &w->timer);
3997 ev_unref (EV_A);
3998 }
1944 3999
1945 ev_start (EV_A_ (W)w, 1); 4000 ev_start (EV_A_ (W)w, 1);
4001
4002 EV_FREQUENT_CHECK;
1946} 4003}
1947 4004
1948void 4005void
1949ev_stat_stop (EV_P_ ev_stat *w) 4006ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
1950{ 4007{
1951 ev_clear_pending (EV_A_ (W)w); 4008 clear_pending (EV_A_ (W)w);
1952 if (expect_false (!ev_is_active (w))) 4009 if (expect_false (!ev_is_active (w)))
1953 return; 4010 return;
1954 4011
4012 EV_FREQUENT_CHECK;
4013
1955#if EV_USE_INOTIFY 4014#if EV_USE_INOTIFY
1956 infy_del (EV_A_ w); 4015 infy_del (EV_A_ w);
1957#endif 4016#endif
4017
4018 if (ev_is_active (&w->timer))
4019 {
4020 ev_ref (EV_A);
1958 ev_timer_stop (EV_A_ &w->timer); 4021 ev_timer_stop (EV_A_ &w->timer);
4022 }
1959 4023
1960 ev_stop (EV_A_ (W)w); 4024 ev_stop (EV_A_ (W)w);
1961}
1962#endif
1963 4025
4026 EV_FREQUENT_CHECK;
4027}
4028#endif
4029
4030#if EV_IDLE_ENABLE
1964void 4031void
1965ev_idle_start (EV_P_ ev_idle *w) 4032ev_idle_start (EV_P_ ev_idle *w) EV_THROW
1966{ 4033{
1967 if (expect_false (ev_is_active (w))) 4034 if (expect_false (ev_is_active (w)))
1968 return; 4035 return;
1969 4036
4037 pri_adjust (EV_A_ (W)w);
4038
4039 EV_FREQUENT_CHECK;
4040
4041 {
4042 int active = ++idlecnt [ABSPRI (w)];
4043
4044 ++idleall;
1970 ev_start (EV_A_ (W)w, ++idlecnt); 4045 ev_start (EV_A_ (W)w, active);
4046
1971 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 4047 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1972 idles [idlecnt - 1] = w; 4048 idles [ABSPRI (w)][active - 1] = w;
4049 }
4050
4051 EV_FREQUENT_CHECK;
1973} 4052}
1974 4053
1975void 4054void
1976ev_idle_stop (EV_P_ ev_idle *w) 4055ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
1977{ 4056{
1978 ev_clear_pending (EV_A_ (W)w); 4057 clear_pending (EV_A_ (W)w);
1979 if (expect_false (!ev_is_active (w))) 4058 if (expect_false (!ev_is_active (w)))
1980 return; 4059 return;
1981 4060
4061 EV_FREQUENT_CHECK;
4062
1982 { 4063 {
1983 int active = ((W)w)->active; 4064 int active = ev_active (w);
1984 idles [active - 1] = idles [--idlecnt]; 4065
1985 ((W)idles [active - 1])->active = active; 4066 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4067 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4068
4069 ev_stop (EV_A_ (W)w);
4070 --idleall;
1986 } 4071 }
1987 4072
1988 ev_stop (EV_A_ (W)w); 4073 EV_FREQUENT_CHECK;
1989} 4074}
4075#endif
1990 4076
4077#if EV_PREPARE_ENABLE
1991void 4078void
1992ev_prepare_start (EV_P_ ev_prepare *w) 4079ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
1993{ 4080{
1994 if (expect_false (ev_is_active (w))) 4081 if (expect_false (ev_is_active (w)))
1995 return; 4082 return;
4083
4084 EV_FREQUENT_CHECK;
1996 4085
1997 ev_start (EV_A_ (W)w, ++preparecnt); 4086 ev_start (EV_A_ (W)w, ++preparecnt);
1998 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4087 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1999 prepares [preparecnt - 1] = w; 4088 prepares [preparecnt - 1] = w;
4089
4090 EV_FREQUENT_CHECK;
2000} 4091}
2001 4092
2002void 4093void
2003ev_prepare_stop (EV_P_ ev_prepare *w) 4094ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2004{ 4095{
2005 ev_clear_pending (EV_A_ (W)w); 4096 clear_pending (EV_A_ (W)w);
2006 if (expect_false (!ev_is_active (w))) 4097 if (expect_false (!ev_is_active (w)))
2007 return; 4098 return;
2008 4099
4100 EV_FREQUENT_CHECK;
4101
2009 { 4102 {
2010 int active = ((W)w)->active; 4103 int active = ev_active (w);
4104
2011 prepares [active - 1] = prepares [--preparecnt]; 4105 prepares [active - 1] = prepares [--preparecnt];
2012 ((W)prepares [active - 1])->active = active; 4106 ev_active (prepares [active - 1]) = active;
2013 } 4107 }
2014 4108
2015 ev_stop (EV_A_ (W)w); 4109 ev_stop (EV_A_ (W)w);
2016}
2017 4110
4111 EV_FREQUENT_CHECK;
4112}
4113#endif
4114
4115#if EV_CHECK_ENABLE
2018void 4116void
2019ev_check_start (EV_P_ ev_check *w) 4117ev_check_start (EV_P_ ev_check *w) EV_THROW
2020{ 4118{
2021 if (expect_false (ev_is_active (w))) 4119 if (expect_false (ev_is_active (w)))
2022 return; 4120 return;
4121
4122 EV_FREQUENT_CHECK;
2023 4123
2024 ev_start (EV_A_ (W)w, ++checkcnt); 4124 ev_start (EV_A_ (W)w, ++checkcnt);
2025 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4125 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2026 checks [checkcnt - 1] = w; 4126 checks [checkcnt - 1] = w;
4127
4128 EV_FREQUENT_CHECK;
2027} 4129}
2028 4130
2029void 4131void
2030ev_check_stop (EV_P_ ev_check *w) 4132ev_check_stop (EV_P_ ev_check *w) EV_THROW
2031{ 4133{
2032 ev_clear_pending (EV_A_ (W)w); 4134 clear_pending (EV_A_ (W)w);
2033 if (expect_false (!ev_is_active (w))) 4135 if (expect_false (!ev_is_active (w)))
2034 return; 4136 return;
2035 4137
4138 EV_FREQUENT_CHECK;
4139
2036 { 4140 {
2037 int active = ((W)w)->active; 4141 int active = ev_active (w);
4142
2038 checks [active - 1] = checks [--checkcnt]; 4143 checks [active - 1] = checks [--checkcnt];
2039 ((W)checks [active - 1])->active = active; 4144 ev_active (checks [active - 1]) = active;
2040 } 4145 }
2041 4146
2042 ev_stop (EV_A_ (W)w); 4147 ev_stop (EV_A_ (W)w);
4148
4149 EV_FREQUENT_CHECK;
2043} 4150}
4151#endif
2044 4152
2045#if EV_EMBED_ENABLE 4153#if EV_EMBED_ENABLE
2046void noinline 4154void noinline
2047ev_embed_sweep (EV_P_ ev_embed *w) 4155ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2048{ 4156{
2049 ev_loop (w->loop, EVLOOP_NONBLOCK); 4157 ev_run (w->other, EVRUN_NOWAIT);
2050} 4158}
2051 4159
2052static void 4160static void
2053embed_cb (EV_P_ ev_io *io, int revents) 4161embed_io_cb (EV_P_ ev_io *io, int revents)
2054{ 4162{
2055 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4163 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2056 4164
2057 if (ev_cb (w)) 4165 if (ev_cb (w))
2058 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4166 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2059 else 4167 else
2060 ev_embed_sweep (loop, w); 4168 ev_run (w->other, EVRUN_NOWAIT);
2061} 4169}
4170
4171static void
4172embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4173{
4174 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4175
4176 {
4177 EV_P = w->other;
4178
4179 while (fdchangecnt)
4180 {
4181 fd_reify (EV_A);
4182 ev_run (EV_A_ EVRUN_NOWAIT);
4183 }
4184 }
4185}
4186
4187static void
4188embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4189{
4190 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4191
4192 ev_embed_stop (EV_A_ w);
4193
4194 {
4195 EV_P = w->other;
4196
4197 ev_loop_fork (EV_A);
4198 ev_run (EV_A_ EVRUN_NOWAIT);
4199 }
4200
4201 ev_embed_start (EV_A_ w);
4202}
4203
4204#if 0
4205static void
4206embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4207{
4208 ev_idle_stop (EV_A_ idle);
4209}
4210#endif
2062 4211
2063void 4212void
2064ev_embed_start (EV_P_ ev_embed *w) 4213ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2065{ 4214{
2066 if (expect_false (ev_is_active (w))) 4215 if (expect_false (ev_is_active (w)))
2067 return; 4216 return;
2068 4217
2069 { 4218 {
2070 struct ev_loop *loop = w->loop; 4219 EV_P = w->other;
2071 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4220 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2072 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4221 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2073 } 4222 }
4223
4224 EV_FREQUENT_CHECK;
2074 4225
2075 ev_set_priority (&w->io, ev_priority (w)); 4226 ev_set_priority (&w->io, ev_priority (w));
2076 ev_io_start (EV_A_ &w->io); 4227 ev_io_start (EV_A_ &w->io);
2077 4228
4229 ev_prepare_init (&w->prepare, embed_prepare_cb);
4230 ev_set_priority (&w->prepare, EV_MINPRI);
4231 ev_prepare_start (EV_A_ &w->prepare);
4232
4233 ev_fork_init (&w->fork, embed_fork_cb);
4234 ev_fork_start (EV_A_ &w->fork);
4235
4236 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4237
2078 ev_start (EV_A_ (W)w, 1); 4238 ev_start (EV_A_ (W)w, 1);
4239
4240 EV_FREQUENT_CHECK;
2079} 4241}
2080 4242
2081void 4243void
2082ev_embed_stop (EV_P_ ev_embed *w) 4244ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2083{ 4245{
2084 ev_clear_pending (EV_A_ (W)w); 4246 clear_pending (EV_A_ (W)w);
2085 if (expect_false (!ev_is_active (w))) 4247 if (expect_false (!ev_is_active (w)))
2086 return; 4248 return;
2087 4249
4250 EV_FREQUENT_CHECK;
4251
2088 ev_io_stop (EV_A_ &w->io); 4252 ev_io_stop (EV_A_ &w->io);
4253 ev_prepare_stop (EV_A_ &w->prepare);
4254 ev_fork_stop (EV_A_ &w->fork);
2089 4255
2090 ev_stop (EV_A_ (W)w); 4256 ev_stop (EV_A_ (W)w);
4257
4258 EV_FREQUENT_CHECK;
2091} 4259}
2092#endif 4260#endif
2093 4261
2094#if EV_FORK_ENABLE 4262#if EV_FORK_ENABLE
2095void 4263void
2096ev_fork_start (EV_P_ ev_fork *w) 4264ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2097{ 4265{
2098 if (expect_false (ev_is_active (w))) 4266 if (expect_false (ev_is_active (w)))
2099 return; 4267 return;
4268
4269 EV_FREQUENT_CHECK;
2100 4270
2101 ev_start (EV_A_ (W)w, ++forkcnt); 4271 ev_start (EV_A_ (W)w, ++forkcnt);
2102 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4272 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2103 forks [forkcnt - 1] = w; 4273 forks [forkcnt - 1] = w;
4274
4275 EV_FREQUENT_CHECK;
2104} 4276}
2105 4277
2106void 4278void
2107ev_fork_stop (EV_P_ ev_fork *w) 4279ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2108{ 4280{
2109 ev_clear_pending (EV_A_ (W)w); 4281 clear_pending (EV_A_ (W)w);
2110 if (expect_false (!ev_is_active (w))) 4282 if (expect_false (!ev_is_active (w)))
2111 return; 4283 return;
2112 4284
4285 EV_FREQUENT_CHECK;
4286
2113 { 4287 {
2114 int active = ((W)w)->active; 4288 int active = ev_active (w);
4289
2115 forks [active - 1] = forks [--forkcnt]; 4290 forks [active - 1] = forks [--forkcnt];
2116 ((W)forks [active - 1])->active = active; 4291 ev_active (forks [active - 1]) = active;
2117 } 4292 }
2118 4293
2119 ev_stop (EV_A_ (W)w); 4294 ev_stop (EV_A_ (W)w);
4295
4296 EV_FREQUENT_CHECK;
4297}
4298#endif
4299
4300#if EV_CLEANUP_ENABLE
4301void
4302ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4303{
4304 if (expect_false (ev_is_active (w)))
4305 return;
4306
4307 EV_FREQUENT_CHECK;
4308
4309 ev_start (EV_A_ (W)w, ++cleanupcnt);
4310 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4311 cleanups [cleanupcnt - 1] = w;
4312
4313 /* cleanup watchers should never keep a refcount on the loop */
4314 ev_unref (EV_A);
4315 EV_FREQUENT_CHECK;
4316}
4317
4318void
4319ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4320{
4321 clear_pending (EV_A_ (W)w);
4322 if (expect_false (!ev_is_active (w)))
4323 return;
4324
4325 EV_FREQUENT_CHECK;
4326 ev_ref (EV_A);
4327
4328 {
4329 int active = ev_active (w);
4330
4331 cleanups [active - 1] = cleanups [--cleanupcnt];
4332 ev_active (cleanups [active - 1]) = active;
4333 }
4334
4335 ev_stop (EV_A_ (W)w);
4336
4337 EV_FREQUENT_CHECK;
4338}
4339#endif
4340
4341#if EV_ASYNC_ENABLE
4342void
4343ev_async_start (EV_P_ ev_async *w) EV_THROW
4344{
4345 if (expect_false (ev_is_active (w)))
4346 return;
4347
4348 w->sent = 0;
4349
4350 evpipe_init (EV_A);
4351
4352 EV_FREQUENT_CHECK;
4353
4354 ev_start (EV_A_ (W)w, ++asynccnt);
4355 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4356 asyncs [asynccnt - 1] = w;
4357
4358 EV_FREQUENT_CHECK;
4359}
4360
4361void
4362ev_async_stop (EV_P_ ev_async *w) EV_THROW
4363{
4364 clear_pending (EV_A_ (W)w);
4365 if (expect_false (!ev_is_active (w)))
4366 return;
4367
4368 EV_FREQUENT_CHECK;
4369
4370 {
4371 int active = ev_active (w);
4372
4373 asyncs [active - 1] = asyncs [--asynccnt];
4374 ev_active (asyncs [active - 1]) = active;
4375 }
4376
4377 ev_stop (EV_A_ (W)w);
4378
4379 EV_FREQUENT_CHECK;
4380}
4381
4382void
4383ev_async_send (EV_P_ ev_async *w) EV_THROW
4384{
4385 w->sent = 1;
4386 evpipe_write (EV_A_ &async_pending);
2120} 4387}
2121#endif 4388#endif
2122 4389
2123/*****************************************************************************/ 4390/*****************************************************************************/
2124 4391
… …
2134once_cb (EV_P_ struct ev_once *once, int revents) 4401once_cb (EV_P_ struct ev_once *once, int revents)
2135{ 4402{
2136 void (*cb)(int revents, void *arg) = once->cb; 4403 void (*cb)(int revents, void *arg) = once->cb;
2137 void *arg = once->arg; 4404 void *arg = once->arg;
2138 4405
2139 ev_io_stop (EV_A_ &once->io); 4406 ev_io_stop (EV_A_ &once->io);
2140 ev_timer_stop (EV_A_ &once->to); 4407 ev_timer_stop (EV_A_ &once->to);
2141 ev_free (once); 4408 ev_free (once);
2142 4409
2143 cb (revents, arg); 4410 cb (revents, arg);
2144} 4411}
2145 4412
2146static void 4413static void
2147once_cb_io (EV_P_ ev_io *w, int revents) 4414once_cb_io (EV_P_ ev_io *w, int revents)
2148{ 4415{
2149 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4416 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4417
4418 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2150} 4419}
2151 4420
2152static void 4421static void
2153once_cb_to (EV_P_ ev_timer *w, int revents) 4422once_cb_to (EV_P_ ev_timer *w, int revents)
2154{ 4423{
2155 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4424 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4425
4426 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2156} 4427}
2157 4428
2158void 4429void
2159ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4430ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2160{ 4431{
2161 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4432 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2162 4433
2163 if (expect_false (!once)) 4434 if (expect_false (!once))
2164 { 4435 {
2165 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4436 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2166 return; 4437 return;
2167 } 4438 }
2168 4439
2169 once->cb = cb; 4440 once->cb = cb;
2170 once->arg = arg; 4441 once->arg = arg;
… …
2182 ev_timer_set (&once->to, timeout, 0.); 4453 ev_timer_set (&once->to, timeout, 0.);
2183 ev_timer_start (EV_A_ &once->to); 4454 ev_timer_start (EV_A_ &once->to);
2184 } 4455 }
2185} 4456}
2186 4457
2187#ifdef __cplusplus 4458/*****************************************************************************/
2188} 4459
4460#if EV_WALK_ENABLE
4461void ecb_cold
4462ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4463{
4464 int i, j;
4465 ev_watcher_list *wl, *wn;
4466
4467 if (types & (EV_IO | EV_EMBED))
4468 for (i = 0; i < anfdmax; ++i)
4469 for (wl = anfds [i].head; wl; )
4470 {
4471 wn = wl->next;
4472
4473#if EV_EMBED_ENABLE
4474 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4475 {
4476 if (types & EV_EMBED)
4477 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4478 }
4479 else
4480#endif
4481#if EV_USE_INOTIFY
4482 if (ev_cb ((ev_io *)wl) == infy_cb)
4483 ;
4484 else
4485#endif
4486 if ((ev_io *)wl != &pipe_w)
4487 if (types & EV_IO)
4488 cb (EV_A_ EV_IO, wl);
4489
4490 wl = wn;
4491 }
4492
4493 if (types & (EV_TIMER | EV_STAT))
4494 for (i = timercnt + HEAP0; i-- > HEAP0; )
4495#if EV_STAT_ENABLE
4496 /*TODO: timer is not always active*/
4497 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4498 {
4499 if (types & EV_STAT)
4500 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4501 }
4502 else
4503#endif
4504 if (types & EV_TIMER)
4505 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4506
4507#if EV_PERIODIC_ENABLE
4508 if (types & EV_PERIODIC)
4509 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4510 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4511#endif
4512
4513#if EV_IDLE_ENABLE
4514 if (types & EV_IDLE)
4515 for (j = NUMPRI; j--; )
4516 for (i = idlecnt [j]; i--; )
4517 cb (EV_A_ EV_IDLE, idles [j][i]);
4518#endif
4519
4520#if EV_FORK_ENABLE
4521 if (types & EV_FORK)
4522 for (i = forkcnt; i--; )
4523 if (ev_cb (forks [i]) != embed_fork_cb)
4524 cb (EV_A_ EV_FORK, forks [i]);
4525#endif
4526
4527#if EV_ASYNC_ENABLE
4528 if (types & EV_ASYNC)
4529 for (i = asynccnt; i--; )
4530 cb (EV_A_ EV_ASYNC, asyncs [i]);
4531#endif
4532
4533#if EV_PREPARE_ENABLE
4534 if (types & EV_PREPARE)
4535 for (i = preparecnt; i--; )
4536# if EV_EMBED_ENABLE
4537 if (ev_cb (prepares [i]) != embed_prepare_cb)
2189#endif 4538# endif
4539 cb (EV_A_ EV_PREPARE, prepares [i]);
4540#endif
2190 4541
4542#if EV_CHECK_ENABLE
4543 if (types & EV_CHECK)
4544 for (i = checkcnt; i--; )
4545 cb (EV_A_ EV_CHECK, checks [i]);
4546#endif
4547
4548#if EV_SIGNAL_ENABLE
4549 if (types & EV_SIGNAL)
4550 for (i = 0; i < EV_NSIG - 1; ++i)
4551 for (wl = signals [i].head; wl; )
4552 {
4553 wn = wl->next;
4554 cb (EV_A_ EV_SIGNAL, wl);
4555 wl = wn;
4556 }
4557#endif
4558
4559#if EV_CHILD_ENABLE
4560 if (types & EV_CHILD)
4561 for (i = (EV_PID_HASHSIZE); i--; )
4562 for (wl = childs [i]; wl; )
4563 {
4564 wn = wl->next;
4565 cb (EV_A_ EV_CHILD, wl);
4566 wl = wn;
4567 }
4568#endif
4569/* EV_STAT 0x00001000 /* stat data changed */
4570/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4571}
4572#endif
4573
4574#if EV_MULTIPLICITY
4575 #include "ev_wrap.h"
4576#endif
4577

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