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Comparing libev/ev.c (file contents):
Revision 1.182 by root, Wed Dec 12 01:27:08 2007 UTC vs.
Revision 1.393 by root, Thu Aug 4 14:47:48 2011 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 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"
127#endif 186#endif
187
188EV_CPP(extern "C" {)
128 189
129#ifndef _WIN32 190#ifndef _WIN32
130# include <sys/time.h> 191# include <sys/time.h>
131# include <sys/wait.h> 192# include <sys/wait.h>
132# include <unistd.h> 193# include <unistd.h>
133#else 194#else
195# include <io.h>
134# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 197# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
138# endif 200# endif
201# undef EV_AVOID_STDIO
202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */
213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
139#endif 251# endif
140 252#endif
141/**/
142 253
143#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
144# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
259# endif
145#endif 260#endif
146 261
147#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
264#endif
265
266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
270# define EV_USE_NANOSLEEP 0
271# endif
149#endif 272#endif
150 273
151#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 276#endif
154 277
155#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
156# ifdef _WIN32 279# ifdef _WIN32
157# define EV_USE_POLL 0 280# define EV_USE_POLL 0
158# else 281# else
159# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 283# endif
161#endif 284#endif
162 285
163#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
289# else
164# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
291# endif
165#endif 292#endif
166 293
167#ifndef EV_USE_KQUEUE 294#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 295# define EV_USE_KQUEUE 0
169#endif 296#endif
… …
171#ifndef EV_USE_PORT 298#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 299# define EV_USE_PORT 0
173#endif 300#endif
174 301
175#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_INOTIFY EV_FEATURE_OS
305# else
176# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
307# endif
177#endif 308#endif
178 309
179#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 312#endif
313
314#ifndef EV_INOTIFY_HASHSIZE
315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
316#endif
317
318#ifndef EV_USE_EVENTFD
319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
320# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 321# else
183# define EV_PID_HASHSIZE 16 322# define EV_USE_EVENTFD 0
184# endif 323# endif
185#endif 324#endif
186 325
187#ifndef EV_INOTIFY_HASHSIZE 326#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 328# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 329# else
191# define EV_INOTIFY_HASHSIZE 16 330# define EV_USE_SIGNALFD 0
192# endif 331# endif
193#endif 332#endif
194 333
195/**/ 334#if 0 /* debugging */
335# define EV_VERIFY 3
336# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1
338#endif
339
340#ifndef EV_VERIFY
341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342#endif
343
344#ifndef EV_USE_4HEAP
345# define EV_USE_4HEAP EV_FEATURE_DATA
346#endif
347
348#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
364#endif
365
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
196 373
197#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
200#endif 377#endif
… …
202#ifndef CLOCK_REALTIME 379#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 380# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 381# define EV_USE_REALTIME 0
205#endif 382#endif
206 383
384#if !EV_STAT_ENABLE
385# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0
387#endif
388
389#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
392# include <sys/select.h>
393# endif
394#endif
395
396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
398# include <sys/inotify.h>
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0
403# endif
404#endif
405
207#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 407# include <winsock.h>
209#endif 408#endif
210 409
211#if !EV_STAT_ENABLE 410#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
412# include <stdint.h>
413# ifndef EFD_NONBLOCK
414# define EFD_NONBLOCK O_NONBLOCK
213#endif 415# endif
416# ifndef EFD_CLOEXEC
417# ifdef O_CLOEXEC
418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
214 425
215#if EV_USE_INOTIFY 426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
216# include <sys/inotify.h> 428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445};
217#endif 446#endif
218 447
219/**/ 448/**/
220 449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
221/* 456/*
222 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
223 * It is added to ev_rt_now when scheduling periodics
224 * to ensure progress, time-wise, even when rounding
225 * errors are against us.
226 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
227 * Better solutions welcome.
228 */ 459 */
229#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
230 462
231#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
232#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
233/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
234 465
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
468
469/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ECB.H BEGIN */
471/*
472 * libecb - http://software.schmorp.de/pkg/libecb
473 *
474 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
475 * Copyright (©) 2011 Emanuele Giaquinta
476 * All rights reserved.
477 *
478 * Redistribution and use in source and binary forms, with or without modifica-
479 * tion, are permitted provided that the following conditions are met:
480 *
481 * 1. Redistributions of source code must retain the above copyright notice,
482 * this list of conditions and the following disclaimer.
483 *
484 * 2. Redistributions in binary form must reproduce the above copyright
485 * notice, this list of conditions and the following disclaimer in the
486 * documentation and/or other materials provided with the distribution.
487 *
488 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
489 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
490 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
491 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
492 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
493 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
494 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
495 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
496 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
497 * OF THE POSSIBILITY OF SUCH DAMAGE.
498 */
499
500#ifndef ECB_H
501#define ECB_H
502
503#ifdef _WIN32
504 typedef signed char int8_t;
505 typedef unsigned char uint8_t;
506 typedef signed short int16_t;
507 typedef unsigned short uint16_t;
508 typedef signed int int32_t;
509 typedef unsigned int uint32_t;
235#if __GNUC__ >= 3 510 #if __GNUC__
236# define expect(expr,value) __builtin_expect ((expr),(value)) 511 typedef signed long long int64_t;
237# define noinline __attribute__ ((noinline)) 512 typedef unsigned long long uint64_t;
513 #else /* _MSC_VER || __BORLANDC__ */
514 typedef signed __int64 int64_t;
515 typedef unsigned __int64 uint64_t;
516 #endif
238#else 517#else
239# define expect(expr,value) (expr) 518 #include <inttypes.h>
240# define noinline
241# if __STDC_VERSION__ < 199901L
242# define inline
243# endif 519#endif
520
521/* many compilers define _GNUC_ to some versions but then only implement
522 * what their idiot authors think are the "more important" extensions,
523 * causing enormous grief in return for some better fake benchmark numbers.
524 * or so.
525 * we try to detect these and simply assume they are not gcc - if they have
526 * an issue with that they should have done it right in the first place.
527 */
528#ifndef ECB_GCC_VERSION
529 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
530 #define ECB_GCC_VERSION(major,minor) 0
531 #else
532 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
244#endif 533 #endif
534#endif
245 535
536/*****************************************************************************/
537
538/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
539/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
540
541#if ECB_NO_THREADS || ECB_NO_SMP
542 #define ECB_MEMORY_FENCE do { } while (0)
543#endif
544
545#ifndef ECB_MEMORY_FENCE
546 #if ECB_GCC_VERSION(2,5)
547 #if __x86
548 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
549 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
550 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
551 #elif __amd64
552 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
553 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
554 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
555 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
556 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
557 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
558 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
559 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,4" : : "r" (0) : "memory")
560 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
561 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dsb" : : : "memory")
563 #endif
564 #endif
565#endif
566
567#ifndef ECB_MEMORY_FENCE
568 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER)
569 #define ECB_MEMORY_FENCE __sync_synchronize ()
570 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
571 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
572 #elif _MSC_VER >= 1400 /* VC++ 2005 */
573 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
574 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
575 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
576 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
577 #elif defined(_WIN32)
578 #include <WinNT.h>
579 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
580 #endif
581#endif
582
583#ifndef ECB_MEMORY_FENCE
584 #if !ECB_AVOID_PTHREADS
585 /*
586 * if you get undefined symbol references to pthread_mutex_lock,
587 * or failure to find pthread.h, then you should implement
588 * the ECB_MEMORY_FENCE operations for your cpu/compiler
589 * OR provide pthread.h and link against the posix thread library
590 * of your system.
591 */
592 #include <pthread.h>
593 #define ECB_NEEDS_PTHREADS 1
594 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
595
596 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
597 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
598 #endif
599#endif
600
601#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
602 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
603#endif
604
605#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
606 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
607#endif
608
609/*****************************************************************************/
610
611#define ECB_C99 (__STDC_VERSION__ >= 199901L)
612
613#if __cplusplus
614 #define ecb_inline static inline
615#elif ECB_GCC_VERSION(2,5)
616 #define ecb_inline static __inline__
617#elif ECB_C99
618 #define ecb_inline static inline
619#else
620 #define ecb_inline static
621#endif
622
623#if ECB_GCC_VERSION(3,3)
624 #define ecb_restrict __restrict__
625#elif ECB_C99
626 #define ecb_restrict restrict
627#else
628 #define ecb_restrict
629#endif
630
631typedef int ecb_bool;
632
633#define ECB_CONCAT_(a, b) a ## b
634#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
635#define ECB_STRINGIFY_(a) # a
636#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
637
638#define ecb_function_ ecb_inline
639
640#if ECB_GCC_VERSION(3,1)
641 #define ecb_attribute(attrlist) __attribute__(attrlist)
642 #define ecb_is_constant(expr) __builtin_constant_p (expr)
643 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
644 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
645#else
646 #define ecb_attribute(attrlist)
647 #define ecb_is_constant(expr) 0
648 #define ecb_expect(expr,value) (expr)
649 #define ecb_prefetch(addr,rw,locality)
650#endif
651
652/* no emulation for ecb_decltype */
653#if ECB_GCC_VERSION(4,5)
654 #define ecb_decltype(x) __decltype(x)
655#elif ECB_GCC_VERSION(3,0)
656 #define ecb_decltype(x) __typeof(x)
657#endif
658
659#define ecb_noinline ecb_attribute ((__noinline__))
660#define ecb_noreturn ecb_attribute ((__noreturn__))
661#define ecb_unused ecb_attribute ((__unused__))
662#define ecb_const ecb_attribute ((__const__))
663#define ecb_pure ecb_attribute ((__pure__))
664
665#if ECB_GCC_VERSION(4,3)
666 #define ecb_artificial ecb_attribute ((__artificial__))
667 #define ecb_hot ecb_attribute ((__hot__))
668 #define ecb_cold ecb_attribute ((__cold__))
669#else
670 #define ecb_artificial
671 #define ecb_hot
672 #define ecb_cold
673#endif
674
675/* put around conditional expressions if you are very sure that the */
676/* expression is mostly true or mostly false. note that these return */
677/* booleans, not the expression. */
246#define expect_false(expr) expect ((expr) != 0, 0) 678#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
247#define expect_true(expr) expect ((expr) != 0, 1) 679#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
680/* for compatibility to the rest of the world */
681#define ecb_likely(expr) ecb_expect_true (expr)
682#define ecb_unlikely(expr) ecb_expect_false (expr)
683
684/* count trailing zero bits and count # of one bits */
685#if ECB_GCC_VERSION(3,4)
686 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
687 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
688 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
689 #define ecb_ctz32(x) __builtin_ctz (x)
690 #define ecb_ctz64(x) __builtin_ctzll (x)
691 #define ecb_popcount32(x) __builtin_popcount (x)
692 /* no popcountll */
693#else
694 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
695 ecb_function_ int
696 ecb_ctz32 (uint32_t x)
697 {
698 int r = 0;
699
700 x &= ~x + 1; /* this isolates the lowest bit */
701
702#if ECB_branchless_on_i386
703 r += !!(x & 0xaaaaaaaa) << 0;
704 r += !!(x & 0xcccccccc) << 1;
705 r += !!(x & 0xf0f0f0f0) << 2;
706 r += !!(x & 0xff00ff00) << 3;
707 r += !!(x & 0xffff0000) << 4;
708#else
709 if (x & 0xaaaaaaaa) r += 1;
710 if (x & 0xcccccccc) r += 2;
711 if (x & 0xf0f0f0f0) r += 4;
712 if (x & 0xff00ff00) r += 8;
713 if (x & 0xffff0000) r += 16;
714#endif
715
716 return r;
717 }
718
719 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
720 ecb_function_ int
721 ecb_ctz64 (uint64_t x)
722 {
723 int shift = x & 0xffffffffU ? 0 : 32;
724 return ecb_ctz32 (x >> shift) + shift;
725 }
726
727 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
728 ecb_function_ int
729 ecb_popcount32 (uint32_t x)
730 {
731 x -= (x >> 1) & 0x55555555;
732 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
733 x = ((x >> 4) + x) & 0x0f0f0f0f;
734 x *= 0x01010101;
735
736 return x >> 24;
737 }
738
739 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
740 ecb_function_ int ecb_ld32 (uint32_t x)
741 {
742 int r = 0;
743
744 if (x >> 16) { x >>= 16; r += 16; }
745 if (x >> 8) { x >>= 8; r += 8; }
746 if (x >> 4) { x >>= 4; r += 4; }
747 if (x >> 2) { x >>= 2; r += 2; }
748 if (x >> 1) { r += 1; }
749
750 return r;
751 }
752
753 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
754 ecb_function_ int ecb_ld64 (uint64_t x)
755 {
756 int r = 0;
757
758 if (x >> 32) { x >>= 32; r += 32; }
759
760 return r + ecb_ld32 (x);
761 }
762#endif
763
764/* popcount64 is only available on 64 bit cpus as gcc builtin */
765/* so for this version we are lazy */
766ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
767ecb_function_ int
768ecb_popcount64 (uint64_t x)
769{
770 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
771}
772
773ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
774ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
775ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
776ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
777ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
778ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
779ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
780ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
781
782ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
783ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
784ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
785ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
786ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
787ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
788ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
789ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
790
791#if ECB_GCC_VERSION(4,3)
792 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
793 #define ecb_bswap32(x) __builtin_bswap32 (x)
794 #define ecb_bswap64(x) __builtin_bswap64 (x)
795#else
796 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
797 ecb_function_ uint16_t
798 ecb_bswap16 (uint16_t x)
799 {
800 return ecb_rotl16 (x, 8);
801 }
802
803 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
804 ecb_function_ uint32_t
805 ecb_bswap32 (uint32_t x)
806 {
807 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
808 }
809
810 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
811 ecb_function_ uint64_t
812 ecb_bswap64 (uint64_t x)
813 {
814 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
815 }
816#endif
817
818#if ECB_GCC_VERSION(4,5)
819 #define ecb_unreachable() __builtin_unreachable ()
820#else
821 /* this seems to work fine, but gcc always emits a warning for it :/ */
822 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
823 ecb_function_ void ecb_unreachable (void) { }
824#endif
825
826/* try to tell the compiler that some condition is definitely true */
827#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
828
829ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
830ecb_function_ unsigned char
831ecb_byteorder_helper (void)
832{
833 const uint32_t u = 0x11223344;
834 return *(unsigned char *)&u;
835}
836
837ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
838ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
839ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
840ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
841
842#if ECB_GCC_VERSION(3,0) || ECB_C99
843 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
844#else
845 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
846#endif
847
848#if ecb_cplusplus_does_not_suck
849 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
850 template<typename T, int N>
851 static inline int ecb_array_length (const T (&arr)[N])
852 {
853 return N;
854 }
855#else
856 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
857#endif
858
859#endif
860
861/* ECB.H END */
862
863#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
864# undef ECB_MEMORY_FENCE
865# undef ECB_MEMORY_FENCE_ACQUIRE
866# undef ECB_MEMORY_FENCE_RELEASE
867#endif
868
869#define expect_false(cond) ecb_expect_false (cond)
870#define expect_true(cond) ecb_expect_true (cond)
871#define noinline ecb_noinline
872
248#define inline_size static inline 873#define inline_size ecb_inline
249 874
250#if EV_MINIMAL 875#if EV_FEATURE_CODE
876# define inline_speed ecb_inline
877#else
251# define inline_speed static noinline 878# define inline_speed static noinline
879#endif
880
881#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
882
883#if EV_MINPRI == EV_MAXPRI
884# define ABSPRI(w) (((W)w), 0)
252#else 885#else
253# define inline_speed static inline
254#endif
255
256#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
257#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 886# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
887#endif
258 888
259#define EMPTY /* required for microsofts broken pseudo-c compiler */ 889#define EMPTY /* required for microsofts broken pseudo-c compiler */
260#define EMPTY2(a,b) /* used to suppress some warnings */ 890#define EMPTY2(a,b) /* used to suppress some warnings */
261 891
262typedef ev_watcher *W; 892typedef ev_watcher *W;
263typedef ev_watcher_list *WL; 893typedef ev_watcher_list *WL;
264typedef ev_watcher_time *WT; 894typedef ev_watcher_time *WT;
265 895
896#define ev_active(w) ((W)(w))->active
897#define ev_at(w) ((WT)(w))->at
898
899#if EV_USE_REALTIME
900/* sig_atomic_t is used to avoid per-thread variables or locking but still */
901/* giving it a reasonably high chance of working on typical architectures */
902static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
903#endif
904
905#if EV_USE_MONOTONIC
266static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 906static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
907#endif
908
909#ifndef EV_FD_TO_WIN32_HANDLE
910# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
911#endif
912#ifndef EV_WIN32_HANDLE_TO_FD
913# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
914#endif
915#ifndef EV_WIN32_CLOSE_FD
916# define EV_WIN32_CLOSE_FD(fd) close (fd)
917#endif
267 918
268#ifdef _WIN32 919#ifdef _WIN32
269# include "ev_win32.c" 920# include "ev_win32.c"
270#endif 921#endif
271 922
272/*****************************************************************************/ 923/*****************************************************************************/
273 924
925/* define a suitable floor function (only used by periodics atm) */
926
927#if EV_USE_FLOOR
928# include <math.h>
929# define ev_floor(v) floor (v)
930#else
931
932#include <float.h>
933
934/* a floor() replacement function, should be independent of ev_tstamp type */
935static ev_tstamp noinline
936ev_floor (ev_tstamp v)
937{
938 /* the choice of shift factor is not terribly important */
939#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
940 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
941#else
942 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
943#endif
944
945 /* argument too large for an unsigned long? */
946 if (expect_false (v >= shift))
947 {
948 ev_tstamp f;
949
950 if (v == v - 1.)
951 return v; /* very large number */
952
953 f = shift * ev_floor (v * (1. / shift));
954 return f + ev_floor (v - f);
955 }
956
957 /* special treatment for negative args? */
958 if (expect_false (v < 0.))
959 {
960 ev_tstamp f = -ev_floor (-v);
961
962 return f - (f == v ? 0 : 1);
963 }
964
965 /* fits into an unsigned long */
966 return (unsigned long)v;
967}
968
969#endif
970
971/*****************************************************************************/
972
973#ifdef __linux
974# include <sys/utsname.h>
975#endif
976
977static unsigned int noinline ecb_cold
978ev_linux_version (void)
979{
980#ifdef __linux
981 unsigned int v = 0;
982 struct utsname buf;
983 int i;
984 char *p = buf.release;
985
986 if (uname (&buf))
987 return 0;
988
989 for (i = 3+1; --i; )
990 {
991 unsigned int c = 0;
992
993 for (;;)
994 {
995 if (*p >= '0' && *p <= '9')
996 c = c * 10 + *p++ - '0';
997 else
998 {
999 p += *p == '.';
1000 break;
1001 }
1002 }
1003
1004 v = (v << 8) | c;
1005 }
1006
1007 return v;
1008#else
1009 return 0;
1010#endif
1011}
1012
1013/*****************************************************************************/
1014
1015#if EV_AVOID_STDIO
1016static void noinline ecb_cold
1017ev_printerr (const char *msg)
1018{
1019 write (STDERR_FILENO, msg, strlen (msg));
1020}
1021#endif
1022
274static void (*syserr_cb)(const char *msg); 1023static void (*syserr_cb)(const char *msg);
275 1024
276void 1025void ecb_cold
277ev_set_syserr_cb (void (*cb)(const char *msg)) 1026ev_set_syserr_cb (void (*cb)(const char *msg))
278{ 1027{
279 syserr_cb = cb; 1028 syserr_cb = cb;
280} 1029}
281 1030
282static void noinline 1031static void noinline ecb_cold
283syserr (const char *msg) 1032ev_syserr (const char *msg)
284{ 1033{
285 if (!msg) 1034 if (!msg)
286 msg = "(libev) system error"; 1035 msg = "(libev) system error";
287 1036
288 if (syserr_cb) 1037 if (syserr_cb)
289 syserr_cb (msg); 1038 syserr_cb (msg);
290 else 1039 else
291 { 1040 {
1041#if EV_AVOID_STDIO
1042 ev_printerr (msg);
1043 ev_printerr (": ");
1044 ev_printerr (strerror (errno));
1045 ev_printerr ("\n");
1046#else
292 perror (msg); 1047 perror (msg);
1048#endif
293 abort (); 1049 abort ();
294 } 1050 }
295} 1051}
296 1052
1053static void *
1054ev_realloc_emul (void *ptr, long size)
1055{
1056#if __GLIBC__
1057 return realloc (ptr, size);
1058#else
1059 /* some systems, notably openbsd and darwin, fail to properly
1060 * implement realloc (x, 0) (as required by both ansi c-89 and
1061 * the single unix specification, so work around them here.
1062 */
1063
1064 if (size)
1065 return realloc (ptr, size);
1066
1067 free (ptr);
1068 return 0;
1069#endif
1070}
1071
297static void *(*alloc)(void *ptr, long size); 1072static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
298 1073
299void 1074void ecb_cold
300ev_set_allocator (void *(*cb)(void *ptr, long size)) 1075ev_set_allocator (void *(*cb)(void *ptr, long size))
301{ 1076{
302 alloc = cb; 1077 alloc = cb;
303} 1078}
304 1079
305inline_speed void * 1080inline_speed void *
306ev_realloc (void *ptr, long size) 1081ev_realloc (void *ptr, long size)
307{ 1082{
308 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1083 ptr = alloc (ptr, size);
309 1084
310 if (!ptr && size) 1085 if (!ptr && size)
311 { 1086 {
1087#if EV_AVOID_STDIO
1088 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1089#else
312 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1090 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1091#endif
313 abort (); 1092 abort ();
314 } 1093 }
315 1094
316 return ptr; 1095 return ptr;
317} 1096}
… …
319#define ev_malloc(size) ev_realloc (0, (size)) 1098#define ev_malloc(size) ev_realloc (0, (size))
320#define ev_free(ptr) ev_realloc ((ptr), 0) 1099#define ev_free(ptr) ev_realloc ((ptr), 0)
321 1100
322/*****************************************************************************/ 1101/*****************************************************************************/
323 1102
1103/* set in reify when reification needed */
1104#define EV_ANFD_REIFY 1
1105
1106/* file descriptor info structure */
324typedef struct 1107typedef struct
325{ 1108{
326 WL head; 1109 WL head;
327 unsigned char events; 1110 unsigned char events; /* the events watched for */
1111 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1112 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
328 unsigned char reify; 1113 unsigned char unused;
1114#if EV_USE_EPOLL
1115 unsigned int egen; /* generation counter to counter epoll bugs */
1116#endif
329#if EV_SELECT_IS_WINSOCKET 1117#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
330 SOCKET handle; 1118 SOCKET handle;
331#endif 1119#endif
1120#if EV_USE_IOCP
1121 OVERLAPPED or, ow;
1122#endif
332} ANFD; 1123} ANFD;
333 1124
1125/* stores the pending event set for a given watcher */
334typedef struct 1126typedef struct
335{ 1127{
336 W w; 1128 W w;
337 int events; 1129 int events; /* the pending event set for the given watcher */
338} ANPENDING; 1130} ANPENDING;
339 1131
340#if EV_USE_INOTIFY 1132#if EV_USE_INOTIFY
1133/* hash table entry per inotify-id */
341typedef struct 1134typedef struct
342{ 1135{
343 WL head; 1136 WL head;
344} ANFS; 1137} ANFS;
1138#endif
1139
1140/* Heap Entry */
1141#if EV_HEAP_CACHE_AT
1142 /* a heap element */
1143 typedef struct {
1144 ev_tstamp at;
1145 WT w;
1146 } ANHE;
1147
1148 #define ANHE_w(he) (he).w /* access watcher, read-write */
1149 #define ANHE_at(he) (he).at /* access cached at, read-only */
1150 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1151#else
1152 /* a heap element */
1153 typedef WT ANHE;
1154
1155 #define ANHE_w(he) (he)
1156 #define ANHE_at(he) (he)->at
1157 #define ANHE_at_cache(he)
345#endif 1158#endif
346 1159
347#if EV_MULTIPLICITY 1160#if EV_MULTIPLICITY
348 1161
349 struct ev_loop 1162 struct ev_loop
… …
368 1181
369 static int ev_default_loop_ptr; 1182 static int ev_default_loop_ptr;
370 1183
371#endif 1184#endif
372 1185
1186#if EV_FEATURE_API
1187# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1188# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1189# define EV_INVOKE_PENDING invoke_cb (EV_A)
1190#else
1191# define EV_RELEASE_CB (void)0
1192# define EV_ACQUIRE_CB (void)0
1193# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1194#endif
1195
1196#define EVBREAK_RECURSE 0x80
1197
373/*****************************************************************************/ 1198/*****************************************************************************/
374 1199
1200#ifndef EV_HAVE_EV_TIME
375ev_tstamp 1201ev_tstamp
376ev_time (void) 1202ev_time (void)
377{ 1203{
378#if EV_USE_REALTIME 1204#if EV_USE_REALTIME
1205 if (expect_true (have_realtime))
1206 {
379 struct timespec ts; 1207 struct timespec ts;
380 clock_gettime (CLOCK_REALTIME, &ts); 1208 clock_gettime (CLOCK_REALTIME, &ts);
381 return ts.tv_sec + ts.tv_nsec * 1e-9; 1209 return ts.tv_sec + ts.tv_nsec * 1e-9;
382#else 1210 }
1211#endif
1212
383 struct timeval tv; 1213 struct timeval tv;
384 gettimeofday (&tv, 0); 1214 gettimeofday (&tv, 0);
385 return tv.tv_sec + tv.tv_usec * 1e-6; 1215 return tv.tv_sec + tv.tv_usec * 1e-6;
386#endif
387} 1216}
1217#endif
388 1218
389ev_tstamp inline_size 1219inline_size ev_tstamp
390get_clock (void) 1220get_clock (void)
391{ 1221{
392#if EV_USE_MONOTONIC 1222#if EV_USE_MONOTONIC
393 if (expect_true (have_monotonic)) 1223 if (expect_true (have_monotonic))
394 { 1224 {
… …
407{ 1237{
408 return ev_rt_now; 1238 return ev_rt_now;
409} 1239}
410#endif 1240#endif
411 1241
412int inline_size 1242void
1243ev_sleep (ev_tstamp delay)
1244{
1245 if (delay > 0.)
1246 {
1247#if EV_USE_NANOSLEEP
1248 struct timespec ts;
1249
1250 EV_TS_SET (ts, delay);
1251 nanosleep (&ts, 0);
1252#elif defined(_WIN32)
1253 Sleep ((unsigned long)(delay * 1e3));
1254#else
1255 struct timeval tv;
1256
1257 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1258 /* something not guaranteed by newer posix versions, but guaranteed */
1259 /* by older ones */
1260 EV_TV_SET (tv, delay);
1261 select (0, 0, 0, 0, &tv);
1262#endif
1263 }
1264}
1265
1266/*****************************************************************************/
1267
1268#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1269
1270/* find a suitable new size for the given array, */
1271/* hopefully by rounding to a nice-to-malloc size */
1272inline_size int
413array_nextsize (int elem, int cur, int cnt) 1273array_nextsize (int elem, int cur, int cnt)
414{ 1274{
415 int ncur = cur + 1; 1275 int ncur = cur + 1;
416 1276
417 do 1277 do
418 ncur <<= 1; 1278 ncur <<= 1;
419 while (cnt > ncur); 1279 while (cnt > ncur);
420 1280
421 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1281 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
422 if (elem * ncur > 4096) 1282 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
423 { 1283 {
424 ncur *= elem; 1284 ncur *= elem;
425 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1285 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
426 ncur = ncur - sizeof (void *) * 4; 1286 ncur = ncur - sizeof (void *) * 4;
427 ncur /= elem; 1287 ncur /= elem;
428 } 1288 }
429 1289
430 return ncur; 1290 return ncur;
431} 1291}
432 1292
433static noinline void * 1293static void * noinline ecb_cold
434array_realloc (int elem, void *base, int *cur, int cnt) 1294array_realloc (int elem, void *base, int *cur, int cnt)
435{ 1295{
436 *cur = array_nextsize (elem, *cur, cnt); 1296 *cur = array_nextsize (elem, *cur, cnt);
437 return ev_realloc (base, elem * *cur); 1297 return ev_realloc (base, elem * *cur);
438} 1298}
1299
1300#define array_init_zero(base,count) \
1301 memset ((void *)(base), 0, sizeof (*(base)) * (count))
439 1302
440#define array_needsize(type,base,cur,cnt,init) \ 1303#define array_needsize(type,base,cur,cnt,init) \
441 if (expect_false ((cnt) > (cur))) \ 1304 if (expect_false ((cnt) > (cur))) \
442 { \ 1305 { \
443 int ocur_ = (cur); \ 1306 int ecb_unused ocur_ = (cur); \
444 (base) = (type *)array_realloc \ 1307 (base) = (type *)array_realloc \
445 (sizeof (type), (base), &(cur), (cnt)); \ 1308 (sizeof (type), (base), &(cur), (cnt)); \
446 init ((base) + (ocur_), (cur) - ocur_); \ 1309 init ((base) + (ocur_), (cur) - ocur_); \
447 } 1310 }
448 1311
… …
455 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1318 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
456 } 1319 }
457#endif 1320#endif
458 1321
459#define array_free(stem, idx) \ 1322#define array_free(stem, idx) \
460 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1323 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
461 1324
462/*****************************************************************************/ 1325/*****************************************************************************/
1326
1327/* dummy callback for pending events */
1328static void noinline
1329pendingcb (EV_P_ ev_prepare *w, int revents)
1330{
1331}
463 1332
464void noinline 1333void noinline
465ev_feed_event (EV_P_ void *w, int revents) 1334ev_feed_event (EV_P_ void *w, int revents)
466{ 1335{
467 W w_ = (W)w; 1336 W w_ = (W)w;
… …
476 pendings [pri][w_->pending - 1].w = w_; 1345 pendings [pri][w_->pending - 1].w = w_;
477 pendings [pri][w_->pending - 1].events = revents; 1346 pendings [pri][w_->pending - 1].events = revents;
478 } 1347 }
479} 1348}
480 1349
481void inline_speed 1350inline_speed void
1351feed_reverse (EV_P_ W w)
1352{
1353 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1354 rfeeds [rfeedcnt++] = w;
1355}
1356
1357inline_size void
1358feed_reverse_done (EV_P_ int revents)
1359{
1360 do
1361 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1362 while (rfeedcnt);
1363}
1364
1365inline_speed void
482queue_events (EV_P_ W *events, int eventcnt, int type) 1366queue_events (EV_P_ W *events, int eventcnt, int type)
483{ 1367{
484 int i; 1368 int i;
485 1369
486 for (i = 0; i < eventcnt; ++i) 1370 for (i = 0; i < eventcnt; ++i)
487 ev_feed_event (EV_A_ events [i], type); 1371 ev_feed_event (EV_A_ events [i], type);
488} 1372}
489 1373
490/*****************************************************************************/ 1374/*****************************************************************************/
491 1375
492void inline_size 1376inline_speed void
493anfds_init (ANFD *base, int count)
494{
495 while (count--)
496 {
497 base->head = 0;
498 base->events = EV_NONE;
499 base->reify = 0;
500
501 ++base;
502 }
503}
504
505void inline_speed
506fd_event (EV_P_ int fd, int revents) 1377fd_event_nocheck (EV_P_ int fd, int revents)
507{ 1378{
508 ANFD *anfd = anfds + fd; 1379 ANFD *anfd = anfds + fd;
509 ev_io *w; 1380 ev_io *w;
510 1381
511 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1382 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
515 if (ev) 1386 if (ev)
516 ev_feed_event (EV_A_ (W)w, ev); 1387 ev_feed_event (EV_A_ (W)w, ev);
517 } 1388 }
518} 1389}
519 1390
1391/* do not submit kernel events for fds that have reify set */
1392/* because that means they changed while we were polling for new events */
1393inline_speed void
1394fd_event (EV_P_ int fd, int revents)
1395{
1396 ANFD *anfd = anfds + fd;
1397
1398 if (expect_true (!anfd->reify))
1399 fd_event_nocheck (EV_A_ fd, revents);
1400}
1401
520void 1402void
521ev_feed_fd_event (EV_P_ int fd, int revents) 1403ev_feed_fd_event (EV_P_ int fd, int revents)
522{ 1404{
523 if (fd >= 0 && fd < anfdmax) 1405 if (fd >= 0 && fd < anfdmax)
524 fd_event (EV_A_ fd, revents); 1406 fd_event_nocheck (EV_A_ fd, revents);
525} 1407}
526 1408
527void inline_size 1409/* make sure the external fd watch events are in-sync */
1410/* with the kernel/libev internal state */
1411inline_size void
528fd_reify (EV_P) 1412fd_reify (EV_P)
529{ 1413{
530 int i; 1414 int i;
1415
1416#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1417 for (i = 0; i < fdchangecnt; ++i)
1418 {
1419 int fd = fdchanges [i];
1420 ANFD *anfd = anfds + fd;
1421
1422 if (anfd->reify & EV__IOFDSET && anfd->head)
1423 {
1424 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1425
1426 if (handle != anfd->handle)
1427 {
1428 unsigned long arg;
1429
1430 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1431
1432 /* handle changed, but fd didn't - we need to do it in two steps */
1433 backend_modify (EV_A_ fd, anfd->events, 0);
1434 anfd->events = 0;
1435 anfd->handle = handle;
1436 }
1437 }
1438 }
1439#endif
531 1440
532 for (i = 0; i < fdchangecnt; ++i) 1441 for (i = 0; i < fdchangecnt; ++i)
533 { 1442 {
534 int fd = fdchanges [i]; 1443 int fd = fdchanges [i];
535 ANFD *anfd = anfds + fd; 1444 ANFD *anfd = anfds + fd;
536 ev_io *w; 1445 ev_io *w;
537 1446
538 int events = 0; 1447 unsigned char o_events = anfd->events;
1448 unsigned char o_reify = anfd->reify;
539 1449
540 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1450 anfd->reify = 0;
541 events |= w->events;
542 1451
543#if EV_SELECT_IS_WINSOCKET 1452 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
544 if (events)
545 { 1453 {
546 unsigned long argp; 1454 anfd->events = 0;
547 anfd->handle = _get_osfhandle (fd); 1455
548 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1456 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1457 anfd->events |= (unsigned char)w->events;
1458
1459 if (o_events != anfd->events)
1460 o_reify = EV__IOFDSET; /* actually |= */
549 } 1461 }
550#endif
551 1462
552 anfd->reify = 0; 1463 if (o_reify & EV__IOFDSET)
553
554 backend_modify (EV_A_ fd, anfd->events, events); 1464 backend_modify (EV_A_ fd, o_events, anfd->events);
555 anfd->events = events;
556 } 1465 }
557 1466
558 fdchangecnt = 0; 1467 fdchangecnt = 0;
559} 1468}
560 1469
561void inline_size 1470/* something about the given fd changed */
1471inline_size void
562fd_change (EV_P_ int fd) 1472fd_change (EV_P_ int fd, int flags)
563{ 1473{
564 if (expect_false (anfds [fd].reify)) 1474 unsigned char reify = anfds [fd].reify;
565 return;
566
567 anfds [fd].reify = 1; 1475 anfds [fd].reify |= flags;
568 1476
1477 if (expect_true (!reify))
1478 {
569 ++fdchangecnt; 1479 ++fdchangecnt;
570 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1480 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
571 fdchanges [fdchangecnt - 1] = fd; 1481 fdchanges [fdchangecnt - 1] = fd;
1482 }
572} 1483}
573 1484
574void inline_speed 1485/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1486inline_speed void ecb_cold
575fd_kill (EV_P_ int fd) 1487fd_kill (EV_P_ int fd)
576{ 1488{
577 ev_io *w; 1489 ev_io *w;
578 1490
579 while ((w = (ev_io *)anfds [fd].head)) 1491 while ((w = (ev_io *)anfds [fd].head))
… …
581 ev_io_stop (EV_A_ w); 1493 ev_io_stop (EV_A_ w);
582 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1494 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
583 } 1495 }
584} 1496}
585 1497
586int inline_size 1498/* check whether the given fd is actually valid, for error recovery */
1499inline_size int ecb_cold
587fd_valid (int fd) 1500fd_valid (int fd)
588{ 1501{
589#ifdef _WIN32 1502#ifdef _WIN32
590 return _get_osfhandle (fd) != -1; 1503 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
591#else 1504#else
592 return fcntl (fd, F_GETFD) != -1; 1505 return fcntl (fd, F_GETFD) != -1;
593#endif 1506#endif
594} 1507}
595 1508
596/* called on EBADF to verify fds */ 1509/* called on EBADF to verify fds */
597static void noinline 1510static void noinline ecb_cold
598fd_ebadf (EV_P) 1511fd_ebadf (EV_P)
599{ 1512{
600 int fd; 1513 int fd;
601 1514
602 for (fd = 0; fd < anfdmax; ++fd) 1515 for (fd = 0; fd < anfdmax; ++fd)
603 if (anfds [fd].events) 1516 if (anfds [fd].events)
604 if (!fd_valid (fd) == -1 && errno == EBADF) 1517 if (!fd_valid (fd) && errno == EBADF)
605 fd_kill (EV_A_ fd); 1518 fd_kill (EV_A_ fd);
606} 1519}
607 1520
608/* called on ENOMEM in select/poll to kill some fds and retry */ 1521/* called on ENOMEM in select/poll to kill some fds and retry */
609static void noinline 1522static void noinline ecb_cold
610fd_enomem (EV_P) 1523fd_enomem (EV_P)
611{ 1524{
612 int fd; 1525 int fd;
613 1526
614 for (fd = anfdmax; fd--; ) 1527 for (fd = anfdmax; fd--; )
615 if (anfds [fd].events) 1528 if (anfds [fd].events)
616 { 1529 {
617 fd_kill (EV_A_ fd); 1530 fd_kill (EV_A_ fd);
618 return; 1531 break;
619 } 1532 }
620} 1533}
621 1534
622/* usually called after fork if backend needs to re-arm all fds from scratch */ 1535/* usually called after fork if backend needs to re-arm all fds from scratch */
623static void noinline 1536static void noinline
… …
627 1540
628 for (fd = 0; fd < anfdmax; ++fd) 1541 for (fd = 0; fd < anfdmax; ++fd)
629 if (anfds [fd].events) 1542 if (anfds [fd].events)
630 { 1543 {
631 anfds [fd].events = 0; 1544 anfds [fd].events = 0;
632 fd_change (EV_A_ fd); 1545 anfds [fd].emask = 0;
1546 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
633 } 1547 }
634} 1548}
635 1549
636/*****************************************************************************/ 1550/* used to prepare libev internal fd's */
637 1551/* this is not fork-safe */
638void inline_speed 1552inline_speed void
639upheap (WT *heap, int k)
640{
641 WT w = heap [k];
642
643 while (k)
644 {
645 int p = (k - 1) >> 1;
646
647 if (heap [p]->at <= w->at)
648 break;
649
650 heap [k] = heap [p];
651 ((W)heap [k])->active = k + 1;
652 k = p;
653 }
654
655 heap [k] = w;
656 ((W)heap [k])->active = k + 1;
657}
658
659void inline_speed
660downheap (WT *heap, int N, int k)
661{
662 WT w = heap [k];
663
664 for (;;)
665 {
666 int c = (k << 1) + 1;
667
668 if (c >= N)
669 break;
670
671 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
672 ? 1 : 0;
673
674 if (w->at <= heap [c]->at)
675 break;
676
677 heap [k] = heap [c];
678 ((W)heap [k])->active = k + 1;
679
680 k = c;
681 }
682
683 heap [k] = w;
684 ((W)heap [k])->active = k + 1;
685}
686
687void inline_size
688adjustheap (WT *heap, int N, int k)
689{
690 upheap (heap, k);
691 downheap (heap, N, k);
692}
693
694/*****************************************************************************/
695
696typedef struct
697{
698 WL head;
699 sig_atomic_t volatile gotsig;
700} ANSIG;
701
702static ANSIG *signals;
703static int signalmax;
704
705static int sigpipe [2];
706static sig_atomic_t volatile gotsig;
707static ev_io sigev;
708
709void inline_size
710signals_init (ANSIG *base, int count)
711{
712 while (count--)
713 {
714 base->head = 0;
715 base->gotsig = 0;
716
717 ++base;
718 }
719}
720
721static void
722sighandler (int signum)
723{
724#if _WIN32
725 signal (signum, sighandler);
726#endif
727
728 signals [signum - 1].gotsig = 1;
729
730 if (!gotsig)
731 {
732 int old_errno = errno;
733 gotsig = 1;
734 write (sigpipe [1], &signum, 1);
735 errno = old_errno;
736 }
737}
738
739void noinline
740ev_feed_signal_event (EV_P_ int signum)
741{
742 WL w;
743
744#if EV_MULTIPLICITY
745 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
746#endif
747
748 --signum;
749
750 if (signum < 0 || signum >= signalmax)
751 return;
752
753 signals [signum].gotsig = 0;
754
755 for (w = signals [signum].head; w; w = w->next)
756 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
757}
758
759static void
760sigcb (EV_P_ ev_io *iow, int revents)
761{
762 int signum;
763
764 read (sigpipe [0], &revents, 1);
765 gotsig = 0;
766
767 for (signum = signalmax; signum--; )
768 if (signals [signum].gotsig)
769 ev_feed_signal_event (EV_A_ signum + 1);
770}
771
772void inline_speed
773fd_intern (int fd) 1553fd_intern (int fd)
774{ 1554{
775#ifdef _WIN32 1555#ifdef _WIN32
776 int arg = 1; 1556 unsigned long arg = 1;
777 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1557 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
778#else 1558#else
779 fcntl (fd, F_SETFD, FD_CLOEXEC); 1559 fcntl (fd, F_SETFD, FD_CLOEXEC);
780 fcntl (fd, F_SETFL, O_NONBLOCK); 1560 fcntl (fd, F_SETFL, O_NONBLOCK);
781#endif 1561#endif
782} 1562}
783 1563
784static void noinline
785siginit (EV_P)
786{
787 fd_intern (sigpipe [0]);
788 fd_intern (sigpipe [1]);
789
790 ev_io_set (&sigev, sigpipe [0], EV_READ);
791 ev_io_start (EV_A_ &sigev);
792 ev_unref (EV_A); /* child watcher should not keep loop alive */
793}
794
795/*****************************************************************************/ 1564/*****************************************************************************/
796 1565
1566/*
1567 * the heap functions want a real array index. array index 0 is guaranteed to not
1568 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1569 * the branching factor of the d-tree.
1570 */
1571
1572/*
1573 * at the moment we allow libev the luxury of two heaps,
1574 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1575 * which is more cache-efficient.
1576 * the difference is about 5% with 50000+ watchers.
1577 */
1578#if EV_USE_4HEAP
1579
1580#define DHEAP 4
1581#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1582#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1583#define UPHEAP_DONE(p,k) ((p) == (k))
1584
1585/* away from the root */
1586inline_speed void
1587downheap (ANHE *heap, int N, int k)
1588{
1589 ANHE he = heap [k];
1590 ANHE *E = heap + N + HEAP0;
1591
1592 for (;;)
1593 {
1594 ev_tstamp minat;
1595 ANHE *minpos;
1596 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1597
1598 /* find minimum child */
1599 if (expect_true (pos + DHEAP - 1 < E))
1600 {
1601 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1602 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1603 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1604 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1605 }
1606 else if (pos < E)
1607 {
1608 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1609 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1610 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1611 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1612 }
1613 else
1614 break;
1615
1616 if (ANHE_at (he) <= minat)
1617 break;
1618
1619 heap [k] = *minpos;
1620 ev_active (ANHE_w (*minpos)) = k;
1621
1622 k = minpos - heap;
1623 }
1624
1625 heap [k] = he;
1626 ev_active (ANHE_w (he)) = k;
1627}
1628
1629#else /* 4HEAP */
1630
1631#define HEAP0 1
1632#define HPARENT(k) ((k) >> 1)
1633#define UPHEAP_DONE(p,k) (!(p))
1634
1635/* away from the root */
1636inline_speed void
1637downheap (ANHE *heap, int N, int k)
1638{
1639 ANHE he = heap [k];
1640
1641 for (;;)
1642 {
1643 int c = k << 1;
1644
1645 if (c >= N + HEAP0)
1646 break;
1647
1648 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1649 ? 1 : 0;
1650
1651 if (ANHE_at (he) <= ANHE_at (heap [c]))
1652 break;
1653
1654 heap [k] = heap [c];
1655 ev_active (ANHE_w (heap [k])) = k;
1656
1657 k = c;
1658 }
1659
1660 heap [k] = he;
1661 ev_active (ANHE_w (he)) = k;
1662}
1663#endif
1664
1665/* towards the root */
1666inline_speed void
1667upheap (ANHE *heap, int k)
1668{
1669 ANHE he = heap [k];
1670
1671 for (;;)
1672 {
1673 int p = HPARENT (k);
1674
1675 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1676 break;
1677
1678 heap [k] = heap [p];
1679 ev_active (ANHE_w (heap [k])) = k;
1680 k = p;
1681 }
1682
1683 heap [k] = he;
1684 ev_active (ANHE_w (he)) = k;
1685}
1686
1687/* move an element suitably so it is in a correct place */
1688inline_size void
1689adjustheap (ANHE *heap, int N, int k)
1690{
1691 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1692 upheap (heap, k);
1693 else
1694 downheap (heap, N, k);
1695}
1696
1697/* rebuild the heap: this function is used only once and executed rarely */
1698inline_size void
1699reheap (ANHE *heap, int N)
1700{
1701 int i;
1702
1703 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1704 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1705 for (i = 0; i < N; ++i)
1706 upheap (heap, i + HEAP0);
1707}
1708
1709/*****************************************************************************/
1710
1711/* associate signal watchers to a signal signal */
1712typedef struct
1713{
1714 EV_ATOMIC_T pending;
1715#if EV_MULTIPLICITY
1716 EV_P;
1717#endif
1718 WL head;
1719} ANSIG;
1720
1721static ANSIG signals [EV_NSIG - 1];
1722
1723/*****************************************************************************/
1724
1725#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1726
1727static void noinline ecb_cold
1728evpipe_init (EV_P)
1729{
1730 if (!ev_is_active (&pipe_w))
1731 {
1732# if EV_USE_EVENTFD
1733 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1734 if (evfd < 0 && errno == EINVAL)
1735 evfd = eventfd (0, 0);
1736
1737 if (evfd >= 0)
1738 {
1739 evpipe [0] = -1;
1740 fd_intern (evfd); /* doing it twice doesn't hurt */
1741 ev_io_set (&pipe_w, evfd, EV_READ);
1742 }
1743 else
1744# endif
1745 {
1746 while (pipe (evpipe))
1747 ev_syserr ("(libev) error creating signal/async pipe");
1748
1749 fd_intern (evpipe [0]);
1750 fd_intern (evpipe [1]);
1751 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1752 }
1753
1754 ev_io_start (EV_A_ &pipe_w);
1755 ev_unref (EV_A); /* watcher should not keep loop alive */
1756 }
1757}
1758
1759inline_speed void
1760evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1761{
1762 if (expect_true (*flag))
1763 return;
1764
1765 *flag = 1;
1766
1767 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1768
1769 pipe_write_skipped = 1;
1770
1771 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1772
1773 if (pipe_write_wanted)
1774 {
1775 int old_errno;
1776
1777 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1778
1779 old_errno = errno; /* save errno because write will clobber it */
1780
1781#if EV_USE_EVENTFD
1782 if (evfd >= 0)
1783 {
1784 uint64_t counter = 1;
1785 write (evfd, &counter, sizeof (uint64_t));
1786 }
1787 else
1788#endif
1789 {
1790 /* win32 people keep sending patches that change this write() to send() */
1791 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1792 /* so when you think this write should be a send instead, please find out */
1793 /* where your send() is from - it's definitely not the microsoft send, and */
1794 /* tell me. thank you. */
1795 write (evpipe [1], &(evpipe [1]), 1);
1796 }
1797
1798 errno = old_errno;
1799 }
1800}
1801
1802/* called whenever the libev signal pipe */
1803/* got some events (signal, async) */
1804static void
1805pipecb (EV_P_ ev_io *iow, int revents)
1806{
1807 int i;
1808
1809 if (revents & EV_READ)
1810 {
1811#if EV_USE_EVENTFD
1812 if (evfd >= 0)
1813 {
1814 uint64_t counter;
1815 read (evfd, &counter, sizeof (uint64_t));
1816 }
1817 else
1818#endif
1819 {
1820 char dummy;
1821 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1822 read (evpipe [0], &dummy, 1);
1823 }
1824 }
1825
1826 pipe_write_skipped = 0;
1827
1828#if EV_SIGNAL_ENABLE
1829 if (sig_pending)
1830 {
1831 sig_pending = 0;
1832
1833 for (i = EV_NSIG - 1; i--; )
1834 if (expect_false (signals [i].pending))
1835 ev_feed_signal_event (EV_A_ i + 1);
1836 }
1837#endif
1838
1839#if EV_ASYNC_ENABLE
1840 if (async_pending)
1841 {
1842 async_pending = 0;
1843
1844 for (i = asynccnt; i--; )
1845 if (asyncs [i]->sent)
1846 {
1847 asyncs [i]->sent = 0;
1848 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1849 }
1850 }
1851#endif
1852}
1853
1854/*****************************************************************************/
1855
1856void
1857ev_feed_signal (int signum)
1858{
1859#if EV_MULTIPLICITY
1860 EV_P = signals [signum - 1].loop;
1861
1862 if (!EV_A)
1863 return;
1864#endif
1865
1866 if (!ev_active (&pipe_w))
1867 return;
1868
1869 signals [signum - 1].pending = 1;
1870 evpipe_write (EV_A_ &sig_pending);
1871}
1872
1873static void
1874ev_sighandler (int signum)
1875{
1876#ifdef _WIN32
1877 signal (signum, ev_sighandler);
1878#endif
1879
1880 ev_feed_signal (signum);
1881}
1882
1883void noinline
1884ev_feed_signal_event (EV_P_ int signum)
1885{
1886 WL w;
1887
1888 if (expect_false (signum <= 0 || signum > EV_NSIG))
1889 return;
1890
1891 --signum;
1892
1893#if EV_MULTIPLICITY
1894 /* it is permissible to try to feed a signal to the wrong loop */
1895 /* or, likely more useful, feeding a signal nobody is waiting for */
1896
1897 if (expect_false (signals [signum].loop != EV_A))
1898 return;
1899#endif
1900
1901 signals [signum].pending = 0;
1902
1903 for (w = signals [signum].head; w; w = w->next)
1904 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1905}
1906
1907#if EV_USE_SIGNALFD
1908static void
1909sigfdcb (EV_P_ ev_io *iow, int revents)
1910{
1911 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1912
1913 for (;;)
1914 {
1915 ssize_t res = read (sigfd, si, sizeof (si));
1916
1917 /* not ISO-C, as res might be -1, but works with SuS */
1918 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1919 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1920
1921 if (res < (ssize_t)sizeof (si))
1922 break;
1923 }
1924}
1925#endif
1926
1927#endif
1928
1929/*****************************************************************************/
1930
1931#if EV_CHILD_ENABLE
797static WL childs [EV_PID_HASHSIZE]; 1932static WL childs [EV_PID_HASHSIZE];
798 1933
799#ifndef _WIN32
800
801static ev_signal childev; 1934static ev_signal childev;
802 1935
803void inline_speed 1936#ifndef WIFCONTINUED
1937# define WIFCONTINUED(status) 0
1938#endif
1939
1940/* handle a single child status event */
1941inline_speed void
804child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1942child_reap (EV_P_ int chain, int pid, int status)
805{ 1943{
806 ev_child *w; 1944 ev_child *w;
1945 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
807 1946
808 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1947 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1948 {
809 if (w->pid == pid || !w->pid) 1949 if ((w->pid == pid || !w->pid)
1950 && (!traced || (w->flags & 1)))
810 { 1951 {
811 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1952 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
812 w->rpid = pid; 1953 w->rpid = pid;
813 w->rstatus = status; 1954 w->rstatus = status;
814 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1955 ev_feed_event (EV_A_ (W)w, EV_CHILD);
815 } 1956 }
1957 }
816} 1958}
817 1959
818#ifndef WCONTINUED 1960#ifndef WCONTINUED
819# define WCONTINUED 0 1961# define WCONTINUED 0
820#endif 1962#endif
821 1963
1964/* called on sigchld etc., calls waitpid */
822static void 1965static void
823childcb (EV_P_ ev_signal *sw, int revents) 1966childcb (EV_P_ ev_signal *sw, int revents)
824{ 1967{
825 int pid, status; 1968 int pid, status;
826 1969
… …
829 if (!WCONTINUED 1972 if (!WCONTINUED
830 || errno != EINVAL 1973 || errno != EINVAL
831 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1974 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
832 return; 1975 return;
833 1976
834 /* make sure we are called again until all childs have been reaped */ 1977 /* make sure we are called again until all children have been reaped */
835 /* we need to do it this way so that the callback gets called before we continue */ 1978 /* we need to do it this way so that the callback gets called before we continue */
836 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1979 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
837 1980
838 child_reap (EV_A_ sw, pid, pid, status); 1981 child_reap (EV_A_ pid, pid, status);
839 if (EV_PID_HASHSIZE > 1) 1982 if ((EV_PID_HASHSIZE) > 1)
840 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1983 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
841} 1984}
842 1985
843#endif 1986#endif
844 1987
845/*****************************************************************************/ 1988/*****************************************************************************/
846 1989
1990#if EV_USE_IOCP
1991# include "ev_iocp.c"
1992#endif
847#if EV_USE_PORT 1993#if EV_USE_PORT
848# include "ev_port.c" 1994# include "ev_port.c"
849#endif 1995#endif
850#if EV_USE_KQUEUE 1996#if EV_USE_KQUEUE
851# include "ev_kqueue.c" 1997# include "ev_kqueue.c"
… …
858#endif 2004#endif
859#if EV_USE_SELECT 2005#if EV_USE_SELECT
860# include "ev_select.c" 2006# include "ev_select.c"
861#endif 2007#endif
862 2008
863int 2009int ecb_cold
864ev_version_major (void) 2010ev_version_major (void)
865{ 2011{
866 return EV_VERSION_MAJOR; 2012 return EV_VERSION_MAJOR;
867} 2013}
868 2014
869int 2015int ecb_cold
870ev_version_minor (void) 2016ev_version_minor (void)
871{ 2017{
872 return EV_VERSION_MINOR; 2018 return EV_VERSION_MINOR;
873} 2019}
874 2020
875/* return true if we are running with elevated privileges and should ignore env variables */ 2021/* return true if we are running with elevated privileges and should ignore env variables */
876int inline_size 2022int inline_size ecb_cold
877enable_secure (void) 2023enable_secure (void)
878{ 2024{
879#ifdef _WIN32 2025#ifdef _WIN32
880 return 0; 2026 return 0;
881#else 2027#else
882 return getuid () != geteuid () 2028 return getuid () != geteuid ()
883 || getgid () != getegid (); 2029 || getgid () != getegid ();
884#endif 2030#endif
885} 2031}
886 2032
887unsigned int 2033unsigned int ecb_cold
888ev_supported_backends (void) 2034ev_supported_backends (void)
889{ 2035{
890 unsigned int flags = 0; 2036 unsigned int flags = 0;
891 2037
892 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2038 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
896 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2042 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
897 2043
898 return flags; 2044 return flags;
899} 2045}
900 2046
901unsigned int 2047unsigned int ecb_cold
902ev_recommended_backends (void) 2048ev_recommended_backends (void)
903{ 2049{
904 unsigned int flags = ev_supported_backends (); 2050 unsigned int flags = ev_supported_backends ();
905 2051
906#ifndef __NetBSD__ 2052#ifndef __NetBSD__
907 /* kqueue is borked on everything but netbsd apparently */ 2053 /* kqueue is borked on everything but netbsd apparently */
908 /* it usually doesn't work correctly on anything but sockets and pipes */ 2054 /* it usually doesn't work correctly on anything but sockets and pipes */
909 flags &= ~EVBACKEND_KQUEUE; 2055 flags &= ~EVBACKEND_KQUEUE;
910#endif 2056#endif
911#ifdef __APPLE__ 2057#ifdef __APPLE__
912 // flags &= ~EVBACKEND_KQUEUE; for documentation 2058 /* only select works correctly on that "unix-certified" platform */
913 flags &= ~EVBACKEND_POLL; 2059 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2060 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2061#endif
2062#ifdef __FreeBSD__
2063 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
914#endif 2064#endif
915 2065
916 return flags; 2066 return flags;
917} 2067}
918 2068
919unsigned int 2069unsigned int ecb_cold
920ev_embeddable_backends (void) 2070ev_embeddable_backends (void)
921{ 2071{
922 return EVBACKEND_EPOLL 2072 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
923 | EVBACKEND_KQUEUE 2073
924 | EVBACKEND_PORT; 2074 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2075 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2076 flags &= ~EVBACKEND_EPOLL;
2077
2078 return flags;
925} 2079}
926 2080
927unsigned int 2081unsigned int
928ev_backend (EV_P) 2082ev_backend (EV_P)
929{ 2083{
930 return backend; 2084 return backend;
931} 2085}
932 2086
2087#if EV_FEATURE_API
933unsigned int 2088unsigned int
934ev_loop_count (EV_P) 2089ev_iteration (EV_P)
935{ 2090{
936 return loop_count; 2091 return loop_count;
937} 2092}
938 2093
2094unsigned int
2095ev_depth (EV_P)
2096{
2097 return loop_depth;
2098}
2099
2100void
2101ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2102{
2103 io_blocktime = interval;
2104}
2105
2106void
2107ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2108{
2109 timeout_blocktime = interval;
2110}
2111
2112void
2113ev_set_userdata (EV_P_ void *data)
2114{
2115 userdata = data;
2116}
2117
2118void *
2119ev_userdata (EV_P)
2120{
2121 return userdata;
2122}
2123
2124void
2125ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2126{
2127 invoke_cb = invoke_pending_cb;
2128}
2129
2130void
2131ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2132{
2133 release_cb = release;
2134 acquire_cb = acquire;
2135}
2136#endif
2137
2138/* initialise a loop structure, must be zero-initialised */
939static void noinline 2139static void noinline ecb_cold
940loop_init (EV_P_ unsigned int flags) 2140loop_init (EV_P_ unsigned int flags)
941{ 2141{
942 if (!backend) 2142 if (!backend)
943 { 2143 {
2144 origflags = flags;
2145
2146#if EV_USE_REALTIME
2147 if (!have_realtime)
2148 {
2149 struct timespec ts;
2150
2151 if (!clock_gettime (CLOCK_REALTIME, &ts))
2152 have_realtime = 1;
2153 }
2154#endif
2155
944#if EV_USE_MONOTONIC 2156#if EV_USE_MONOTONIC
2157 if (!have_monotonic)
945 { 2158 {
946 struct timespec ts; 2159 struct timespec ts;
2160
947 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2161 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
948 have_monotonic = 1; 2162 have_monotonic = 1;
949 } 2163 }
950#endif 2164#endif
951
952 ev_rt_now = ev_time ();
953 mn_now = get_clock ();
954 now_floor = mn_now;
955 rtmn_diff = ev_rt_now - mn_now;
956 2165
957 /* pid check not overridable via env */ 2166 /* pid check not overridable via env */
958#ifndef _WIN32 2167#ifndef _WIN32
959 if (flags & EVFLAG_FORKCHECK) 2168 if (flags & EVFLAG_FORKCHECK)
960 curpid = getpid (); 2169 curpid = getpid ();
… …
963 if (!(flags & EVFLAG_NOENV) 2172 if (!(flags & EVFLAG_NOENV)
964 && !enable_secure () 2173 && !enable_secure ()
965 && getenv ("LIBEV_FLAGS")) 2174 && getenv ("LIBEV_FLAGS"))
966 flags = atoi (getenv ("LIBEV_FLAGS")); 2175 flags = atoi (getenv ("LIBEV_FLAGS"));
967 2176
968 if (!(flags & 0x0000ffffUL)) 2177 ev_rt_now = ev_time ();
2178 mn_now = get_clock ();
2179 now_floor = mn_now;
2180 rtmn_diff = ev_rt_now - mn_now;
2181#if EV_FEATURE_API
2182 invoke_cb = ev_invoke_pending;
2183#endif
2184
2185 io_blocktime = 0.;
2186 timeout_blocktime = 0.;
2187 backend = 0;
2188 backend_fd = -1;
2189 sig_pending = 0;
2190#if EV_ASYNC_ENABLE
2191 async_pending = 0;
2192#endif
2193 pipe_write_skipped = 0;
2194 pipe_write_wanted = 0;
2195#if EV_USE_INOTIFY
2196 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2197#endif
2198#if EV_USE_SIGNALFD
2199 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2200#endif
2201
2202 if (!(flags & EVBACKEND_MASK))
969 flags |= ev_recommended_backends (); 2203 flags |= ev_recommended_backends ();
970 2204
971 backend = 0;
972 backend_fd = -1;
973#if EV_USE_INOTIFY 2205#if EV_USE_IOCP
974 fs_fd = -2; 2206 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
975#endif 2207#endif
976
977#if EV_USE_PORT 2208#if EV_USE_PORT
978 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2209 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
979#endif 2210#endif
980#if EV_USE_KQUEUE 2211#if EV_USE_KQUEUE
981 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2212 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
988#endif 2219#endif
989#if EV_USE_SELECT 2220#if EV_USE_SELECT
990 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2221 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
991#endif 2222#endif
992 2223
2224 ev_prepare_init (&pending_w, pendingcb);
2225
2226#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
993 ev_init (&sigev, sigcb); 2227 ev_init (&pipe_w, pipecb);
994 ev_set_priority (&sigev, EV_MAXPRI); 2228 ev_set_priority (&pipe_w, EV_MAXPRI);
2229#endif
995 } 2230 }
996} 2231}
997 2232
998static void noinline 2233/* free up a loop structure */
2234void ecb_cold
999loop_destroy (EV_P) 2235ev_loop_destroy (EV_P)
1000{ 2236{
1001 int i; 2237 int i;
2238
2239#if EV_MULTIPLICITY
2240 /* mimic free (0) */
2241 if (!EV_A)
2242 return;
2243#endif
2244
2245#if EV_CLEANUP_ENABLE
2246 /* queue cleanup watchers (and execute them) */
2247 if (expect_false (cleanupcnt))
2248 {
2249 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2250 EV_INVOKE_PENDING;
2251 }
2252#endif
2253
2254#if EV_CHILD_ENABLE
2255 if (ev_is_active (&childev))
2256 {
2257 ev_ref (EV_A); /* child watcher */
2258 ev_signal_stop (EV_A_ &childev);
2259 }
2260#endif
2261
2262 if (ev_is_active (&pipe_w))
2263 {
2264 /*ev_ref (EV_A);*/
2265 /*ev_io_stop (EV_A_ &pipe_w);*/
2266
2267#if EV_USE_EVENTFD
2268 if (evfd >= 0)
2269 close (evfd);
2270#endif
2271
2272 if (evpipe [0] >= 0)
2273 {
2274 EV_WIN32_CLOSE_FD (evpipe [0]);
2275 EV_WIN32_CLOSE_FD (evpipe [1]);
2276 }
2277 }
2278
2279#if EV_USE_SIGNALFD
2280 if (ev_is_active (&sigfd_w))
2281 close (sigfd);
2282#endif
1002 2283
1003#if EV_USE_INOTIFY 2284#if EV_USE_INOTIFY
1004 if (fs_fd >= 0) 2285 if (fs_fd >= 0)
1005 close (fs_fd); 2286 close (fs_fd);
1006#endif 2287#endif
1007 2288
1008 if (backend_fd >= 0) 2289 if (backend_fd >= 0)
1009 close (backend_fd); 2290 close (backend_fd);
1010 2291
2292#if EV_USE_IOCP
2293 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2294#endif
1011#if EV_USE_PORT 2295#if EV_USE_PORT
1012 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2296 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1013#endif 2297#endif
1014#if EV_USE_KQUEUE 2298#if EV_USE_KQUEUE
1015 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2299 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1030#if EV_IDLE_ENABLE 2314#if EV_IDLE_ENABLE
1031 array_free (idle, [i]); 2315 array_free (idle, [i]);
1032#endif 2316#endif
1033 } 2317 }
1034 2318
2319 ev_free (anfds); anfds = 0; anfdmax = 0;
2320
1035 /* have to use the microsoft-never-gets-it-right macro */ 2321 /* have to use the microsoft-never-gets-it-right macro */
2322 array_free (rfeed, EMPTY);
1036 array_free (fdchange, EMPTY); 2323 array_free (fdchange, EMPTY);
1037 array_free (timer, EMPTY); 2324 array_free (timer, EMPTY);
1038#if EV_PERIODIC_ENABLE 2325#if EV_PERIODIC_ENABLE
1039 array_free (periodic, EMPTY); 2326 array_free (periodic, EMPTY);
1040#endif 2327#endif
2328#if EV_FORK_ENABLE
2329 array_free (fork, EMPTY);
2330#endif
2331#if EV_CLEANUP_ENABLE
2332 array_free (cleanup, EMPTY);
2333#endif
1041 array_free (prepare, EMPTY); 2334 array_free (prepare, EMPTY);
1042 array_free (check, EMPTY); 2335 array_free (check, EMPTY);
2336#if EV_ASYNC_ENABLE
2337 array_free (async, EMPTY);
2338#endif
1043 2339
1044 backend = 0; 2340 backend = 0;
1045}
1046 2341
2342#if EV_MULTIPLICITY
2343 if (ev_is_default_loop (EV_A))
2344#endif
2345 ev_default_loop_ptr = 0;
2346#if EV_MULTIPLICITY
2347 else
2348 ev_free (EV_A);
2349#endif
2350}
2351
2352#if EV_USE_INOTIFY
1047void inline_size infy_fork (EV_P); 2353inline_size void infy_fork (EV_P);
2354#endif
1048 2355
1049void inline_size 2356inline_size void
1050loop_fork (EV_P) 2357loop_fork (EV_P)
1051{ 2358{
1052#if EV_USE_PORT 2359#if EV_USE_PORT
1053 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2360 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1054#endif 2361#endif
… …
1060#endif 2367#endif
1061#if EV_USE_INOTIFY 2368#if EV_USE_INOTIFY
1062 infy_fork (EV_A); 2369 infy_fork (EV_A);
1063#endif 2370#endif
1064 2371
1065 if (ev_is_active (&sigev)) 2372 if (ev_is_active (&pipe_w))
1066 { 2373 {
1067 /* default loop */ 2374 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1068 2375
1069 ev_ref (EV_A); 2376 ev_ref (EV_A);
1070 ev_io_stop (EV_A_ &sigev); 2377 ev_io_stop (EV_A_ &pipe_w);
1071 close (sigpipe [0]);
1072 close (sigpipe [1]);
1073 2378
1074 while (pipe (sigpipe)) 2379#if EV_USE_EVENTFD
1075 syserr ("(libev) error creating pipe"); 2380 if (evfd >= 0)
2381 close (evfd);
2382#endif
1076 2383
2384 if (evpipe [0] >= 0)
2385 {
2386 EV_WIN32_CLOSE_FD (evpipe [0]);
2387 EV_WIN32_CLOSE_FD (evpipe [1]);
2388 }
2389
2390#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1077 siginit (EV_A); 2391 evpipe_init (EV_A);
2392 /* now iterate over everything, in case we missed something */
2393 pipecb (EV_A_ &pipe_w, EV_READ);
2394#endif
1078 } 2395 }
1079 2396
1080 postfork = 0; 2397 postfork = 0;
1081} 2398}
1082 2399
1083#if EV_MULTIPLICITY 2400#if EV_MULTIPLICITY
2401
1084struct ev_loop * 2402struct ev_loop * ecb_cold
1085ev_loop_new (unsigned int flags) 2403ev_loop_new (unsigned int flags)
1086{ 2404{
1087 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2405 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1088 2406
1089 memset (loop, 0, sizeof (struct ev_loop)); 2407 memset (EV_A, 0, sizeof (struct ev_loop));
1090
1091 loop_init (EV_A_ flags); 2408 loop_init (EV_A_ flags);
1092 2409
1093 if (ev_backend (EV_A)) 2410 if (ev_backend (EV_A))
1094 return loop; 2411 return EV_A;
1095 2412
2413 ev_free (EV_A);
1096 return 0; 2414 return 0;
1097} 2415}
1098 2416
1099void 2417#endif /* multiplicity */
1100ev_loop_destroy (EV_P)
1101{
1102 loop_destroy (EV_A);
1103 ev_free (loop);
1104}
1105 2418
1106void 2419#if EV_VERIFY
1107ev_loop_fork (EV_P) 2420static void noinline ecb_cold
2421verify_watcher (EV_P_ W w)
1108{ 2422{
1109 postfork = 1; 2423 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1110}
1111 2424
2425 if (w->pending)
2426 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2427}
2428
2429static void noinline ecb_cold
2430verify_heap (EV_P_ ANHE *heap, int N)
2431{
2432 int i;
2433
2434 for (i = HEAP0; i < N + HEAP0; ++i)
2435 {
2436 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2437 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2438 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2439
2440 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2441 }
2442}
2443
2444static void noinline ecb_cold
2445array_verify (EV_P_ W *ws, int cnt)
2446{
2447 while (cnt--)
2448 {
2449 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2450 verify_watcher (EV_A_ ws [cnt]);
2451 }
2452}
2453#endif
2454
2455#if EV_FEATURE_API
2456void ecb_cold
2457ev_verify (EV_P)
2458{
2459#if EV_VERIFY
2460 int i;
2461 WL w;
2462
2463 assert (activecnt >= -1);
2464
2465 assert (fdchangemax >= fdchangecnt);
2466 for (i = 0; i < fdchangecnt; ++i)
2467 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2468
2469 assert (anfdmax >= 0);
2470 for (i = 0; i < anfdmax; ++i)
2471 for (w = anfds [i].head; w; w = w->next)
2472 {
2473 verify_watcher (EV_A_ (W)w);
2474 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2475 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2476 }
2477
2478 assert (timermax >= timercnt);
2479 verify_heap (EV_A_ timers, timercnt);
2480
2481#if EV_PERIODIC_ENABLE
2482 assert (periodicmax >= periodiccnt);
2483 verify_heap (EV_A_ periodics, periodiccnt);
2484#endif
2485
2486 for (i = NUMPRI; i--; )
2487 {
2488 assert (pendingmax [i] >= pendingcnt [i]);
2489#if EV_IDLE_ENABLE
2490 assert (idleall >= 0);
2491 assert (idlemax [i] >= idlecnt [i]);
2492 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2493#endif
2494 }
2495
2496#if EV_FORK_ENABLE
2497 assert (forkmax >= forkcnt);
2498 array_verify (EV_A_ (W *)forks, forkcnt);
2499#endif
2500
2501#if EV_CLEANUP_ENABLE
2502 assert (cleanupmax >= cleanupcnt);
2503 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2504#endif
2505
2506#if EV_ASYNC_ENABLE
2507 assert (asyncmax >= asynccnt);
2508 array_verify (EV_A_ (W *)asyncs, asynccnt);
2509#endif
2510
2511#if EV_PREPARE_ENABLE
2512 assert (preparemax >= preparecnt);
2513 array_verify (EV_A_ (W *)prepares, preparecnt);
2514#endif
2515
2516#if EV_CHECK_ENABLE
2517 assert (checkmax >= checkcnt);
2518 array_verify (EV_A_ (W *)checks, checkcnt);
2519#endif
2520
2521# if 0
2522#if EV_CHILD_ENABLE
2523 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2524 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2525#endif
2526# endif
2527#endif
2528}
1112#endif 2529#endif
1113 2530
1114#if EV_MULTIPLICITY 2531#if EV_MULTIPLICITY
1115struct ev_loop * 2532struct ev_loop * ecb_cold
1116ev_default_loop_init (unsigned int flags)
1117#else 2533#else
1118int 2534int
2535#endif
1119ev_default_loop (unsigned int flags) 2536ev_default_loop (unsigned int flags)
1120#endif
1121{ 2537{
1122 if (sigpipe [0] == sigpipe [1])
1123 if (pipe (sigpipe))
1124 return 0;
1125
1126 if (!ev_default_loop_ptr) 2538 if (!ev_default_loop_ptr)
1127 { 2539 {
1128#if EV_MULTIPLICITY 2540#if EV_MULTIPLICITY
1129 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2541 EV_P = ev_default_loop_ptr = &default_loop_struct;
1130#else 2542#else
1131 ev_default_loop_ptr = 1; 2543 ev_default_loop_ptr = 1;
1132#endif 2544#endif
1133 2545
1134 loop_init (EV_A_ flags); 2546 loop_init (EV_A_ flags);
1135 2547
1136 if (ev_backend (EV_A)) 2548 if (ev_backend (EV_A))
1137 { 2549 {
1138 siginit (EV_A); 2550#if EV_CHILD_ENABLE
1139
1140#ifndef _WIN32
1141 ev_signal_init (&childev, childcb, SIGCHLD); 2551 ev_signal_init (&childev, childcb, SIGCHLD);
1142 ev_set_priority (&childev, EV_MAXPRI); 2552 ev_set_priority (&childev, EV_MAXPRI);
1143 ev_signal_start (EV_A_ &childev); 2553 ev_signal_start (EV_A_ &childev);
1144 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2554 ev_unref (EV_A); /* child watcher should not keep loop alive */
1145#endif 2555#endif
… …
1150 2560
1151 return ev_default_loop_ptr; 2561 return ev_default_loop_ptr;
1152} 2562}
1153 2563
1154void 2564void
1155ev_default_destroy (void) 2565ev_loop_fork (EV_P)
1156{ 2566{
1157#if EV_MULTIPLICITY 2567 postfork = 1; /* must be in line with ev_default_fork */
1158 struct ev_loop *loop = ev_default_loop_ptr;
1159#endif
1160
1161#ifndef _WIN32
1162 ev_ref (EV_A); /* child watcher */
1163 ev_signal_stop (EV_A_ &childev);
1164#endif
1165
1166 ev_ref (EV_A); /* signal watcher */
1167 ev_io_stop (EV_A_ &sigev);
1168
1169 close (sigpipe [0]); sigpipe [0] = 0;
1170 close (sigpipe [1]); sigpipe [1] = 0;
1171
1172 loop_destroy (EV_A);
1173}
1174
1175void
1176ev_default_fork (void)
1177{
1178#if EV_MULTIPLICITY
1179 struct ev_loop *loop = ev_default_loop_ptr;
1180#endif
1181
1182 if (backend)
1183 postfork = 1;
1184} 2568}
1185 2569
1186/*****************************************************************************/ 2570/*****************************************************************************/
1187 2571
1188void 2572void
1189ev_invoke (EV_P_ void *w, int revents) 2573ev_invoke (EV_P_ void *w, int revents)
1190{ 2574{
1191 EV_CB_INVOKE ((W)w, revents); 2575 EV_CB_INVOKE ((W)w, revents);
1192} 2576}
1193 2577
1194void inline_speed 2578unsigned int
1195call_pending (EV_P) 2579ev_pending_count (EV_P)
2580{
2581 int pri;
2582 unsigned int count = 0;
2583
2584 for (pri = NUMPRI; pri--; )
2585 count += pendingcnt [pri];
2586
2587 return count;
2588}
2589
2590void noinline
2591ev_invoke_pending (EV_P)
1196{ 2592{
1197 int pri; 2593 int pri;
1198 2594
1199 for (pri = NUMPRI; pri--; ) 2595 for (pri = NUMPRI; pri--; )
1200 while (pendingcnt [pri]) 2596 while (pendingcnt [pri])
1201 { 2597 {
1202 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2598 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1203 2599
1204 if (expect_true (p->w))
1205 {
1206 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1207
1208 p->w->pending = 0; 2600 p->w->pending = 0;
1209 EV_CB_INVOKE (p->w, p->events); 2601 EV_CB_INVOKE (p->w, p->events);
1210 } 2602 EV_FREQUENT_CHECK;
1211 } 2603 }
1212} 2604}
1213 2605
1214void inline_size
1215timers_reify (EV_P)
1216{
1217 while (timercnt && ((WT)timers [0])->at <= mn_now)
1218 {
1219 ev_timer *w = (ev_timer *)timers [0];
1220
1221 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1222
1223 /* first reschedule or stop timer */
1224 if (w->repeat)
1225 {
1226 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1227
1228 ((WT)w)->at += w->repeat;
1229 if (((WT)w)->at < mn_now)
1230 ((WT)w)->at = mn_now;
1231
1232 downheap (timers, timercnt, 0);
1233 }
1234 else
1235 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1236
1237 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1238 }
1239}
1240
1241#if EV_PERIODIC_ENABLE
1242void inline_size
1243periodics_reify (EV_P)
1244{
1245 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1246 {
1247 ev_periodic *w = (ev_periodic *)periodics [0];
1248
1249 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1250
1251 /* first reschedule or stop timer */
1252 if (w->reschedule_cb)
1253 {
1254 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1255 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1256 downheap (periodics, periodiccnt, 0);
1257 }
1258 else if (w->interval)
1259 {
1260 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1261 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1262 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1263 downheap (periodics, periodiccnt, 0);
1264 }
1265 else
1266 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1267
1268 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1269 }
1270}
1271
1272static void noinline
1273periodics_reschedule (EV_P)
1274{
1275 int i;
1276
1277 /* adjust periodics after time jump */
1278 for (i = 0; i < periodiccnt; ++i)
1279 {
1280 ev_periodic *w = (ev_periodic *)periodics [i];
1281
1282 if (w->reschedule_cb)
1283 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1284 else if (w->interval)
1285 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1286 }
1287
1288 /* now rebuild the heap */
1289 for (i = periodiccnt >> 1; i--; )
1290 downheap (periodics, periodiccnt, i);
1291}
1292#endif
1293
1294#if EV_IDLE_ENABLE 2606#if EV_IDLE_ENABLE
1295void inline_size 2607/* make idle watchers pending. this handles the "call-idle */
2608/* only when higher priorities are idle" logic */
2609inline_size void
1296idle_reify (EV_P) 2610idle_reify (EV_P)
1297{ 2611{
1298 if (expect_false (idleall)) 2612 if (expect_false (idleall))
1299 { 2613 {
1300 int pri; 2614 int pri;
… …
1312 } 2626 }
1313 } 2627 }
1314} 2628}
1315#endif 2629#endif
1316 2630
1317void inline_speed 2631/* make timers pending */
2632inline_size void
2633timers_reify (EV_P)
2634{
2635 EV_FREQUENT_CHECK;
2636
2637 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2638 {
2639 do
2640 {
2641 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2642
2643 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2644
2645 /* first reschedule or stop timer */
2646 if (w->repeat)
2647 {
2648 ev_at (w) += w->repeat;
2649 if (ev_at (w) < mn_now)
2650 ev_at (w) = mn_now;
2651
2652 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2653
2654 ANHE_at_cache (timers [HEAP0]);
2655 downheap (timers, timercnt, HEAP0);
2656 }
2657 else
2658 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2659
2660 EV_FREQUENT_CHECK;
2661 feed_reverse (EV_A_ (W)w);
2662 }
2663 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2664
2665 feed_reverse_done (EV_A_ EV_TIMER);
2666 }
2667}
2668
2669#if EV_PERIODIC_ENABLE
2670
2671static void noinline
2672periodic_recalc (EV_P_ ev_periodic *w)
2673{
2674 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2675 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2676
2677 /* the above almost always errs on the low side */
2678 while (at <= ev_rt_now)
2679 {
2680 ev_tstamp nat = at + w->interval;
2681
2682 /* when resolution fails us, we use ev_rt_now */
2683 if (expect_false (nat == at))
2684 {
2685 at = ev_rt_now;
2686 break;
2687 }
2688
2689 at = nat;
2690 }
2691
2692 ev_at (w) = at;
2693}
2694
2695/* make periodics pending */
2696inline_size void
2697periodics_reify (EV_P)
2698{
2699 EV_FREQUENT_CHECK;
2700
2701 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2702 {
2703 int feed_count = 0;
2704
2705 do
2706 {
2707 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2708
2709 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2710
2711 /* first reschedule or stop timer */
2712 if (w->reschedule_cb)
2713 {
2714 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2715
2716 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2717
2718 ANHE_at_cache (periodics [HEAP0]);
2719 downheap (periodics, periodiccnt, HEAP0);
2720 }
2721 else if (w->interval)
2722 {
2723 periodic_recalc (EV_A_ w);
2724 ANHE_at_cache (periodics [HEAP0]);
2725 downheap (periodics, periodiccnt, HEAP0);
2726 }
2727 else
2728 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2729
2730 EV_FREQUENT_CHECK;
2731 feed_reverse (EV_A_ (W)w);
2732 }
2733 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2734
2735 feed_reverse_done (EV_A_ EV_PERIODIC);
2736 }
2737}
2738
2739/* simply recalculate all periodics */
2740/* TODO: maybe ensure that at least one event happens when jumping forward? */
2741static void noinline ecb_cold
2742periodics_reschedule (EV_P)
2743{
2744 int i;
2745
2746 /* adjust periodics after time jump */
2747 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2748 {
2749 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2750
2751 if (w->reschedule_cb)
2752 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2753 else if (w->interval)
2754 periodic_recalc (EV_A_ w);
2755
2756 ANHE_at_cache (periodics [i]);
2757 }
2758
2759 reheap (periodics, periodiccnt);
2760}
2761#endif
2762
2763/* adjust all timers by a given offset */
2764static void noinline ecb_cold
2765timers_reschedule (EV_P_ ev_tstamp adjust)
2766{
2767 int i;
2768
2769 for (i = 0; i < timercnt; ++i)
2770 {
2771 ANHE *he = timers + i + HEAP0;
2772 ANHE_w (*he)->at += adjust;
2773 ANHE_at_cache (*he);
2774 }
2775}
2776
2777/* fetch new monotonic and realtime times from the kernel */
2778/* also detect if there was a timejump, and act accordingly */
2779inline_speed void
1318time_update (EV_P_ ev_tstamp max_block) 2780time_update (EV_P_ ev_tstamp max_block)
1319{ 2781{
1320 int i;
1321
1322#if EV_USE_MONOTONIC 2782#if EV_USE_MONOTONIC
1323 if (expect_true (have_monotonic)) 2783 if (expect_true (have_monotonic))
1324 { 2784 {
2785 int i;
1325 ev_tstamp odiff = rtmn_diff; 2786 ev_tstamp odiff = rtmn_diff;
1326 2787
1327 mn_now = get_clock (); 2788 mn_now = get_clock ();
1328 2789
1329 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2790 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1345 * doesn't hurt either as we only do this on time-jumps or 2806 * doesn't hurt either as we only do this on time-jumps or
1346 * in the unlikely event of having been preempted here. 2807 * in the unlikely event of having been preempted here.
1347 */ 2808 */
1348 for (i = 4; --i; ) 2809 for (i = 4; --i; )
1349 { 2810 {
2811 ev_tstamp diff;
1350 rtmn_diff = ev_rt_now - mn_now; 2812 rtmn_diff = ev_rt_now - mn_now;
1351 2813
1352 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2814 diff = odiff - rtmn_diff;
2815
2816 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1353 return; /* all is well */ 2817 return; /* all is well */
1354 2818
1355 ev_rt_now = ev_time (); 2819 ev_rt_now = ev_time ();
1356 mn_now = get_clock (); 2820 mn_now = get_clock ();
1357 now_floor = mn_now; 2821 now_floor = mn_now;
1358 } 2822 }
1359 2823
2824 /* no timer adjustment, as the monotonic clock doesn't jump */
2825 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1360# if EV_PERIODIC_ENABLE 2826# if EV_PERIODIC_ENABLE
1361 periodics_reschedule (EV_A); 2827 periodics_reschedule (EV_A);
1362# endif 2828# endif
1363 /* no timer adjustment, as the monotonic clock doesn't jump */
1364 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1365 } 2829 }
1366 else 2830 else
1367#endif 2831#endif
1368 { 2832 {
1369 ev_rt_now = ev_time (); 2833 ev_rt_now = ev_time ();
1370 2834
1371 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2835 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1372 { 2836 {
2837 /* adjust timers. this is easy, as the offset is the same for all of them */
2838 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1373#if EV_PERIODIC_ENABLE 2839#if EV_PERIODIC_ENABLE
1374 periodics_reschedule (EV_A); 2840 periodics_reschedule (EV_A);
1375#endif 2841#endif
1376 /* adjust timers. this is easy, as the offset is the same for all of them */
1377 for (i = 0; i < timercnt; ++i)
1378 ((WT)timers [i])->at += ev_rt_now - mn_now;
1379 } 2842 }
1380 2843
1381 mn_now = ev_rt_now; 2844 mn_now = ev_rt_now;
1382 } 2845 }
1383} 2846}
1384 2847
1385void 2848void
1386ev_ref (EV_P)
1387{
1388 ++activecnt;
1389}
1390
1391void
1392ev_unref (EV_P)
1393{
1394 --activecnt;
1395}
1396
1397static int loop_done;
1398
1399void
1400ev_loop (EV_P_ int flags) 2849ev_run (EV_P_ int flags)
1401{ 2850{
1402 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2851#if EV_FEATURE_API
1403 ? EVUNLOOP_ONE 2852 ++loop_depth;
1404 : EVUNLOOP_CANCEL; 2853#endif
1405 2854
2855 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2856
2857 loop_done = EVBREAK_CANCEL;
2858
1406 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2859 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1407 2860
1408 do 2861 do
1409 { 2862 {
2863#if EV_VERIFY >= 2
2864 ev_verify (EV_A);
2865#endif
2866
1410#ifndef _WIN32 2867#ifndef _WIN32
1411 if (expect_false (curpid)) /* penalise the forking check even more */ 2868 if (expect_false (curpid)) /* penalise the forking check even more */
1412 if (expect_false (getpid () != curpid)) 2869 if (expect_false (getpid () != curpid))
1413 { 2870 {
1414 curpid = getpid (); 2871 curpid = getpid ();
… …
1420 /* we might have forked, so queue fork handlers */ 2877 /* we might have forked, so queue fork handlers */
1421 if (expect_false (postfork)) 2878 if (expect_false (postfork))
1422 if (forkcnt) 2879 if (forkcnt)
1423 { 2880 {
1424 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2881 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1425 call_pending (EV_A); 2882 EV_INVOKE_PENDING;
1426 } 2883 }
1427#endif 2884#endif
1428 2885
2886#if EV_PREPARE_ENABLE
1429 /* queue prepare watchers (and execute them) */ 2887 /* queue prepare watchers (and execute them) */
1430 if (expect_false (preparecnt)) 2888 if (expect_false (preparecnt))
1431 { 2889 {
1432 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2890 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1433 call_pending (EV_A); 2891 EV_INVOKE_PENDING;
1434 } 2892 }
2893#endif
1435 2894
1436 if (expect_false (!activecnt)) 2895 if (expect_false (loop_done))
1437 break; 2896 break;
1438 2897
1439 /* we might have forked, so reify kernel state if necessary */ 2898 /* we might have forked, so reify kernel state if necessary */
1440 if (expect_false (postfork)) 2899 if (expect_false (postfork))
1441 loop_fork (EV_A); 2900 loop_fork (EV_A);
… …
1443 /* update fd-related kernel structures */ 2902 /* update fd-related kernel structures */
1444 fd_reify (EV_A); 2903 fd_reify (EV_A);
1445 2904
1446 /* calculate blocking time */ 2905 /* calculate blocking time */
1447 { 2906 {
1448 ev_tstamp block; 2907 ev_tstamp waittime = 0.;
2908 ev_tstamp sleeptime = 0.;
1449 2909
1450 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2910 /* remember old timestamp for io_blocktime calculation */
1451 block = 0.; /* do not block at all */ 2911 ev_tstamp prev_mn_now = mn_now;
1452 else 2912
2913 /* update time to cancel out callback processing overhead */
2914 time_update (EV_A_ 1e100);
2915
2916 /* from now on, we want a pipe-wake-up */
2917 pipe_write_wanted = 1;
2918
2919 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2920
2921 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1453 { 2922 {
1454 /* update time to cancel out callback processing overhead */
1455 time_update (EV_A_ 1e100);
1456
1457 block = MAX_BLOCKTIME; 2923 waittime = MAX_BLOCKTIME;
1458 2924
1459 if (timercnt) 2925 if (timercnt)
1460 { 2926 {
1461 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2927 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1462 if (block > to) block = to; 2928 if (waittime > to) waittime = to;
1463 } 2929 }
1464 2930
1465#if EV_PERIODIC_ENABLE 2931#if EV_PERIODIC_ENABLE
1466 if (periodiccnt) 2932 if (periodiccnt)
1467 { 2933 {
1468 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2934 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1469 if (block > to) block = to; 2935 if (waittime > to) waittime = to;
1470 } 2936 }
1471#endif 2937#endif
1472 2938
2939 /* don't let timeouts decrease the waittime below timeout_blocktime */
2940 if (expect_false (waittime < timeout_blocktime))
2941 waittime = timeout_blocktime;
2942
2943 /* at this point, we NEED to wait, so we have to ensure */
2944 /* to pass a minimum nonzero value to the backend */
2945 if (expect_false (waittime < backend_mintime))
2946 waittime = backend_mintime;
2947
2948 /* extra check because io_blocktime is commonly 0 */
1473 if (expect_false (block < 0.)) block = 0.; 2949 if (expect_false (io_blocktime))
2950 {
2951 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2952
2953 if (sleeptime > waittime - backend_mintime)
2954 sleeptime = waittime - backend_mintime;
2955
2956 if (expect_true (sleeptime > 0.))
2957 {
2958 ev_sleep (sleeptime);
2959 waittime -= sleeptime;
2960 }
2961 }
1474 } 2962 }
1475 2963
2964#if EV_FEATURE_API
1476 ++loop_count; 2965 ++loop_count;
2966#endif
2967 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1477 backend_poll (EV_A_ block); 2968 backend_poll (EV_A_ waittime);
2969 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2970
2971 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2972
2973 if (pipe_write_skipped)
2974 {
2975 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2976 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2977 }
2978
1478 2979
1479 /* update ev_rt_now, do magic */ 2980 /* update ev_rt_now, do magic */
1480 time_update (EV_A_ block); 2981 time_update (EV_A_ waittime + sleeptime);
1481 } 2982 }
1482 2983
1483 /* queue pending timers and reschedule them */ 2984 /* queue pending timers and reschedule them */
1484 timers_reify (EV_A); /* relative timers called last */ 2985 timers_reify (EV_A); /* relative timers called last */
1485#if EV_PERIODIC_ENABLE 2986#if EV_PERIODIC_ENABLE
… …
1489#if EV_IDLE_ENABLE 2990#if EV_IDLE_ENABLE
1490 /* queue idle watchers unless other events are pending */ 2991 /* queue idle watchers unless other events are pending */
1491 idle_reify (EV_A); 2992 idle_reify (EV_A);
1492#endif 2993#endif
1493 2994
2995#if EV_CHECK_ENABLE
1494 /* queue check watchers, to be executed first */ 2996 /* queue check watchers, to be executed first */
1495 if (expect_false (checkcnt)) 2997 if (expect_false (checkcnt))
1496 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2998 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2999#endif
1497 3000
1498 call_pending (EV_A); 3001 EV_INVOKE_PENDING;
1499
1500 } 3002 }
1501 while (expect_true (activecnt && !loop_done)); 3003 while (expect_true (
3004 activecnt
3005 && !loop_done
3006 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3007 ));
1502 3008
1503 if (loop_done == EVUNLOOP_ONE) 3009 if (loop_done == EVBREAK_ONE)
1504 loop_done = EVUNLOOP_CANCEL; 3010 loop_done = EVBREAK_CANCEL;
3011
3012#if EV_FEATURE_API
3013 --loop_depth;
3014#endif
1505} 3015}
1506 3016
1507void 3017void
1508ev_unloop (EV_P_ int how) 3018ev_break (EV_P_ int how)
1509{ 3019{
1510 loop_done = how; 3020 loop_done = how;
1511} 3021}
1512 3022
3023void
3024ev_ref (EV_P)
3025{
3026 ++activecnt;
3027}
3028
3029void
3030ev_unref (EV_P)
3031{
3032 --activecnt;
3033}
3034
3035void
3036ev_now_update (EV_P)
3037{
3038 time_update (EV_A_ 1e100);
3039}
3040
3041void
3042ev_suspend (EV_P)
3043{
3044 ev_now_update (EV_A);
3045}
3046
3047void
3048ev_resume (EV_P)
3049{
3050 ev_tstamp mn_prev = mn_now;
3051
3052 ev_now_update (EV_A);
3053 timers_reschedule (EV_A_ mn_now - mn_prev);
3054#if EV_PERIODIC_ENABLE
3055 /* TODO: really do this? */
3056 periodics_reschedule (EV_A);
3057#endif
3058}
3059
1513/*****************************************************************************/ 3060/*****************************************************************************/
3061/* singly-linked list management, used when the expected list length is short */
1514 3062
1515void inline_size 3063inline_size void
1516wlist_add (WL *head, WL elem) 3064wlist_add (WL *head, WL elem)
1517{ 3065{
1518 elem->next = *head; 3066 elem->next = *head;
1519 *head = elem; 3067 *head = elem;
1520} 3068}
1521 3069
1522void inline_size 3070inline_size void
1523wlist_del (WL *head, WL elem) 3071wlist_del (WL *head, WL elem)
1524{ 3072{
1525 while (*head) 3073 while (*head)
1526 { 3074 {
1527 if (*head == elem) 3075 if (expect_true (*head == elem))
1528 { 3076 {
1529 *head = elem->next; 3077 *head = elem->next;
1530 return; 3078 break;
1531 } 3079 }
1532 3080
1533 head = &(*head)->next; 3081 head = &(*head)->next;
1534 } 3082 }
1535} 3083}
1536 3084
1537void inline_speed 3085/* internal, faster, version of ev_clear_pending */
3086inline_speed void
1538clear_pending (EV_P_ W w) 3087clear_pending (EV_P_ W w)
1539{ 3088{
1540 if (w->pending) 3089 if (w->pending)
1541 { 3090 {
1542 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3091 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1543 w->pending = 0; 3092 w->pending = 0;
1544 } 3093 }
1545} 3094}
1546 3095
1547int 3096int
… …
1551 int pending = w_->pending; 3100 int pending = w_->pending;
1552 3101
1553 if (expect_true (pending)) 3102 if (expect_true (pending))
1554 { 3103 {
1555 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3104 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3105 p->w = (W)&pending_w;
1556 w_->pending = 0; 3106 w_->pending = 0;
1557 p->w = 0;
1558 return p->events; 3107 return p->events;
1559 } 3108 }
1560 else 3109 else
1561 return 0; 3110 return 0;
1562} 3111}
1563 3112
1564void inline_size 3113inline_size void
1565pri_adjust (EV_P_ W w) 3114pri_adjust (EV_P_ W w)
1566{ 3115{
1567 int pri = w->priority; 3116 int pri = ev_priority (w);
1568 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3117 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1569 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3118 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1570 w->priority = pri; 3119 ev_set_priority (w, pri);
1571} 3120}
1572 3121
1573void inline_speed 3122inline_speed void
1574ev_start (EV_P_ W w, int active) 3123ev_start (EV_P_ W w, int active)
1575{ 3124{
1576 pri_adjust (EV_A_ w); 3125 pri_adjust (EV_A_ w);
1577 w->active = active; 3126 w->active = active;
1578 ev_ref (EV_A); 3127 ev_ref (EV_A);
1579} 3128}
1580 3129
1581void inline_size 3130inline_size void
1582ev_stop (EV_P_ W w) 3131ev_stop (EV_P_ W w)
1583{ 3132{
1584 ev_unref (EV_A); 3133 ev_unref (EV_A);
1585 w->active = 0; 3134 w->active = 0;
1586} 3135}
… …
1593 int fd = w->fd; 3142 int fd = w->fd;
1594 3143
1595 if (expect_false (ev_is_active (w))) 3144 if (expect_false (ev_is_active (w)))
1596 return; 3145 return;
1597 3146
1598 assert (("ev_io_start called with negative fd", fd >= 0)); 3147 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3148 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3149
3150 EV_FREQUENT_CHECK;
1599 3151
1600 ev_start (EV_A_ (W)w, 1); 3152 ev_start (EV_A_ (W)w, 1);
1601 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3153 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1602 wlist_add (&anfds[fd].head, (WL)w); 3154 wlist_add (&anfds[fd].head, (WL)w);
1603 3155
1604 fd_change (EV_A_ fd); 3156 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3157 w->events &= ~EV__IOFDSET;
3158
3159 EV_FREQUENT_CHECK;
1605} 3160}
1606 3161
1607void noinline 3162void noinline
1608ev_io_stop (EV_P_ ev_io *w) 3163ev_io_stop (EV_P_ ev_io *w)
1609{ 3164{
1610 clear_pending (EV_A_ (W)w); 3165 clear_pending (EV_A_ (W)w);
1611 if (expect_false (!ev_is_active (w))) 3166 if (expect_false (!ev_is_active (w)))
1612 return; 3167 return;
1613 3168
1614 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3169 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3170
3171 EV_FREQUENT_CHECK;
1615 3172
1616 wlist_del (&anfds[w->fd].head, (WL)w); 3173 wlist_del (&anfds[w->fd].head, (WL)w);
1617 ev_stop (EV_A_ (W)w); 3174 ev_stop (EV_A_ (W)w);
1618 3175
1619 fd_change (EV_A_ w->fd); 3176 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3177
3178 EV_FREQUENT_CHECK;
1620} 3179}
1621 3180
1622void noinline 3181void noinline
1623ev_timer_start (EV_P_ ev_timer *w) 3182ev_timer_start (EV_P_ ev_timer *w)
1624{ 3183{
1625 if (expect_false (ev_is_active (w))) 3184 if (expect_false (ev_is_active (w)))
1626 return; 3185 return;
1627 3186
1628 ((WT)w)->at += mn_now; 3187 ev_at (w) += mn_now;
1629 3188
1630 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3189 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1631 3190
3191 EV_FREQUENT_CHECK;
3192
3193 ++timercnt;
1632 ev_start (EV_A_ (W)w, ++timercnt); 3194 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1633 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3195 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1634 timers [timercnt - 1] = (WT)w; 3196 ANHE_w (timers [ev_active (w)]) = (WT)w;
1635 upheap (timers, timercnt - 1); 3197 ANHE_at_cache (timers [ev_active (w)]);
3198 upheap (timers, ev_active (w));
1636 3199
3200 EV_FREQUENT_CHECK;
3201
1637 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3202 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1638} 3203}
1639 3204
1640void noinline 3205void noinline
1641ev_timer_stop (EV_P_ ev_timer *w) 3206ev_timer_stop (EV_P_ ev_timer *w)
1642{ 3207{
1643 clear_pending (EV_A_ (W)w); 3208 clear_pending (EV_A_ (W)w);
1644 if (expect_false (!ev_is_active (w))) 3209 if (expect_false (!ev_is_active (w)))
1645 return; 3210 return;
1646 3211
1647 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3212 EV_FREQUENT_CHECK;
1648 3213
1649 { 3214 {
1650 int active = ((W)w)->active; 3215 int active = ev_active (w);
1651 3216
3217 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3218
3219 --timercnt;
3220
1652 if (expect_true (--active < --timercnt)) 3221 if (expect_true (active < timercnt + HEAP0))
1653 { 3222 {
1654 timers [active] = timers [timercnt]; 3223 timers [active] = timers [timercnt + HEAP0];
1655 adjustheap (timers, timercnt, active); 3224 adjustheap (timers, timercnt, active);
1656 } 3225 }
1657 } 3226 }
1658 3227
1659 ((WT)w)->at -= mn_now; 3228 ev_at (w) -= mn_now;
1660 3229
1661 ev_stop (EV_A_ (W)w); 3230 ev_stop (EV_A_ (W)w);
3231
3232 EV_FREQUENT_CHECK;
1662} 3233}
1663 3234
1664void noinline 3235void noinline
1665ev_timer_again (EV_P_ ev_timer *w) 3236ev_timer_again (EV_P_ ev_timer *w)
1666{ 3237{
3238 EV_FREQUENT_CHECK;
3239
1667 if (ev_is_active (w)) 3240 if (ev_is_active (w))
1668 { 3241 {
1669 if (w->repeat) 3242 if (w->repeat)
1670 { 3243 {
1671 ((WT)w)->at = mn_now + w->repeat; 3244 ev_at (w) = mn_now + w->repeat;
3245 ANHE_at_cache (timers [ev_active (w)]);
1672 adjustheap (timers, timercnt, ((W)w)->active - 1); 3246 adjustheap (timers, timercnt, ev_active (w));
1673 } 3247 }
1674 else 3248 else
1675 ev_timer_stop (EV_A_ w); 3249 ev_timer_stop (EV_A_ w);
1676 } 3250 }
1677 else if (w->repeat) 3251 else if (w->repeat)
1678 { 3252 {
1679 w->at = w->repeat; 3253 ev_at (w) = w->repeat;
1680 ev_timer_start (EV_A_ w); 3254 ev_timer_start (EV_A_ w);
1681 } 3255 }
3256
3257 EV_FREQUENT_CHECK;
3258}
3259
3260ev_tstamp
3261ev_timer_remaining (EV_P_ ev_timer *w)
3262{
3263 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1682} 3264}
1683 3265
1684#if EV_PERIODIC_ENABLE 3266#if EV_PERIODIC_ENABLE
1685void noinline 3267void noinline
1686ev_periodic_start (EV_P_ ev_periodic *w) 3268ev_periodic_start (EV_P_ ev_periodic *w)
1687{ 3269{
1688 if (expect_false (ev_is_active (w))) 3270 if (expect_false (ev_is_active (w)))
1689 return; 3271 return;
1690 3272
1691 if (w->reschedule_cb) 3273 if (w->reschedule_cb)
1692 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3274 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1693 else if (w->interval) 3275 else if (w->interval)
1694 { 3276 {
1695 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3277 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1696 /* this formula differs from the one in periodic_reify because we do not always round up */ 3278 periodic_recalc (EV_A_ w);
1697 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1698 } 3279 }
1699 else 3280 else
1700 ((WT)w)->at = w->offset; 3281 ev_at (w) = w->offset;
1701 3282
3283 EV_FREQUENT_CHECK;
3284
3285 ++periodiccnt;
1702 ev_start (EV_A_ (W)w, ++periodiccnt); 3286 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1703 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 3287 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1704 periodics [periodiccnt - 1] = (WT)w; 3288 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1705 upheap (periodics, periodiccnt - 1); 3289 ANHE_at_cache (periodics [ev_active (w)]);
3290 upheap (periodics, ev_active (w));
1706 3291
3292 EV_FREQUENT_CHECK;
3293
1707 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3294 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1708} 3295}
1709 3296
1710void noinline 3297void noinline
1711ev_periodic_stop (EV_P_ ev_periodic *w) 3298ev_periodic_stop (EV_P_ ev_periodic *w)
1712{ 3299{
1713 clear_pending (EV_A_ (W)w); 3300 clear_pending (EV_A_ (W)w);
1714 if (expect_false (!ev_is_active (w))) 3301 if (expect_false (!ev_is_active (w)))
1715 return; 3302 return;
1716 3303
1717 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3304 EV_FREQUENT_CHECK;
1718 3305
1719 { 3306 {
1720 int active = ((W)w)->active; 3307 int active = ev_active (w);
1721 3308
3309 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3310
3311 --periodiccnt;
3312
1722 if (expect_true (--active < --periodiccnt)) 3313 if (expect_true (active < periodiccnt + HEAP0))
1723 { 3314 {
1724 periodics [active] = periodics [periodiccnt]; 3315 periodics [active] = periodics [periodiccnt + HEAP0];
1725 adjustheap (periodics, periodiccnt, active); 3316 adjustheap (periodics, periodiccnt, active);
1726 } 3317 }
1727 } 3318 }
1728 3319
1729 ev_stop (EV_A_ (W)w); 3320 ev_stop (EV_A_ (W)w);
3321
3322 EV_FREQUENT_CHECK;
1730} 3323}
1731 3324
1732void noinline 3325void noinline
1733ev_periodic_again (EV_P_ ev_periodic *w) 3326ev_periodic_again (EV_P_ ev_periodic *w)
1734{ 3327{
… …
1740 3333
1741#ifndef SA_RESTART 3334#ifndef SA_RESTART
1742# define SA_RESTART 0 3335# define SA_RESTART 0
1743#endif 3336#endif
1744 3337
3338#if EV_SIGNAL_ENABLE
3339
1745void noinline 3340void noinline
1746ev_signal_start (EV_P_ ev_signal *w) 3341ev_signal_start (EV_P_ ev_signal *w)
1747{ 3342{
1748#if EV_MULTIPLICITY
1749 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1750#endif
1751 if (expect_false (ev_is_active (w))) 3343 if (expect_false (ev_is_active (w)))
1752 return; 3344 return;
1753 3345
1754 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3346 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1755 3347
3348#if EV_MULTIPLICITY
3349 assert (("libev: a signal must not be attached to two different loops",
3350 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3351
3352 signals [w->signum - 1].loop = EV_A;
3353#endif
3354
3355 EV_FREQUENT_CHECK;
3356
3357#if EV_USE_SIGNALFD
3358 if (sigfd == -2)
1756 { 3359 {
1757#ifndef _WIN32 3360 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1758 sigset_t full, prev; 3361 if (sigfd < 0 && errno == EINVAL)
1759 sigfillset (&full); 3362 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1760 sigprocmask (SIG_SETMASK, &full, &prev);
1761#endif
1762 3363
1763 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3364 if (sigfd >= 0)
3365 {
3366 fd_intern (sigfd); /* doing it twice will not hurt */
1764 3367
1765#ifndef _WIN32 3368 sigemptyset (&sigfd_set);
1766 sigprocmask (SIG_SETMASK, &prev, 0); 3369
1767#endif 3370 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3371 ev_set_priority (&sigfd_w, EV_MAXPRI);
3372 ev_io_start (EV_A_ &sigfd_w);
3373 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3374 }
1768 } 3375 }
3376
3377 if (sigfd >= 0)
3378 {
3379 /* TODO: check .head */
3380 sigaddset (&sigfd_set, w->signum);
3381 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3382
3383 signalfd (sigfd, &sigfd_set, 0);
3384 }
3385#endif
1769 3386
1770 ev_start (EV_A_ (W)w, 1); 3387 ev_start (EV_A_ (W)w, 1);
1771 wlist_add (&signals [w->signum - 1].head, (WL)w); 3388 wlist_add (&signals [w->signum - 1].head, (WL)w);
1772 3389
1773 if (!((WL)w)->next) 3390 if (!((WL)w)->next)
3391# if EV_USE_SIGNALFD
3392 if (sigfd < 0) /*TODO*/
3393# endif
1774 { 3394 {
1775#if _WIN32 3395# ifdef _WIN32
3396 evpipe_init (EV_A);
3397
1776 signal (w->signum, sighandler); 3398 signal (w->signum, ev_sighandler);
1777#else 3399# else
1778 struct sigaction sa; 3400 struct sigaction sa;
3401
3402 evpipe_init (EV_A);
3403
1779 sa.sa_handler = sighandler; 3404 sa.sa_handler = ev_sighandler;
1780 sigfillset (&sa.sa_mask); 3405 sigfillset (&sa.sa_mask);
1781 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3406 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1782 sigaction (w->signum, &sa, 0); 3407 sigaction (w->signum, &sa, 0);
3408
3409 if (origflags & EVFLAG_NOSIGMASK)
3410 {
3411 sigemptyset (&sa.sa_mask);
3412 sigaddset (&sa.sa_mask, w->signum);
3413 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3414 }
1783#endif 3415#endif
1784 } 3416 }
3417
3418 EV_FREQUENT_CHECK;
1785} 3419}
1786 3420
1787void noinline 3421void noinline
1788ev_signal_stop (EV_P_ ev_signal *w) 3422ev_signal_stop (EV_P_ ev_signal *w)
1789{ 3423{
1790 clear_pending (EV_A_ (W)w); 3424 clear_pending (EV_A_ (W)w);
1791 if (expect_false (!ev_is_active (w))) 3425 if (expect_false (!ev_is_active (w)))
1792 return; 3426 return;
1793 3427
3428 EV_FREQUENT_CHECK;
3429
1794 wlist_del (&signals [w->signum - 1].head, (WL)w); 3430 wlist_del (&signals [w->signum - 1].head, (WL)w);
1795 ev_stop (EV_A_ (W)w); 3431 ev_stop (EV_A_ (W)w);
1796 3432
1797 if (!signals [w->signum - 1].head) 3433 if (!signals [w->signum - 1].head)
3434 {
3435#if EV_MULTIPLICITY
3436 signals [w->signum - 1].loop = 0; /* unattach from signal */
3437#endif
3438#if EV_USE_SIGNALFD
3439 if (sigfd >= 0)
3440 {
3441 sigset_t ss;
3442
3443 sigemptyset (&ss);
3444 sigaddset (&ss, w->signum);
3445 sigdelset (&sigfd_set, w->signum);
3446
3447 signalfd (sigfd, &sigfd_set, 0);
3448 sigprocmask (SIG_UNBLOCK, &ss, 0);
3449 }
3450 else
3451#endif
1798 signal (w->signum, SIG_DFL); 3452 signal (w->signum, SIG_DFL);
3453 }
3454
3455 EV_FREQUENT_CHECK;
1799} 3456}
3457
3458#endif
3459
3460#if EV_CHILD_ENABLE
1800 3461
1801void 3462void
1802ev_child_start (EV_P_ ev_child *w) 3463ev_child_start (EV_P_ ev_child *w)
1803{ 3464{
1804#if EV_MULTIPLICITY 3465#if EV_MULTIPLICITY
1805 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3466 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1806#endif 3467#endif
1807 if (expect_false (ev_is_active (w))) 3468 if (expect_false (ev_is_active (w)))
1808 return; 3469 return;
1809 3470
3471 EV_FREQUENT_CHECK;
3472
1810 ev_start (EV_A_ (W)w, 1); 3473 ev_start (EV_A_ (W)w, 1);
1811 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3474 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3475
3476 EV_FREQUENT_CHECK;
1812} 3477}
1813 3478
1814void 3479void
1815ev_child_stop (EV_P_ ev_child *w) 3480ev_child_stop (EV_P_ ev_child *w)
1816{ 3481{
1817 clear_pending (EV_A_ (W)w); 3482 clear_pending (EV_A_ (W)w);
1818 if (expect_false (!ev_is_active (w))) 3483 if (expect_false (!ev_is_active (w)))
1819 return; 3484 return;
1820 3485
3486 EV_FREQUENT_CHECK;
3487
1821 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3488 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1822 ev_stop (EV_A_ (W)w); 3489 ev_stop (EV_A_ (W)w);
3490
3491 EV_FREQUENT_CHECK;
1823} 3492}
3493
3494#endif
1824 3495
1825#if EV_STAT_ENABLE 3496#if EV_STAT_ENABLE
1826 3497
1827# ifdef _WIN32 3498# ifdef _WIN32
1828# undef lstat 3499# undef lstat
1829# define lstat(a,b) _stati64 (a,b) 3500# define lstat(a,b) _stati64 (a,b)
1830# endif 3501# endif
1831 3502
1832#define DEF_STAT_INTERVAL 5.0074891 3503#define DEF_STAT_INTERVAL 5.0074891
3504#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1833#define MIN_STAT_INTERVAL 0.1074891 3505#define MIN_STAT_INTERVAL 0.1074891
1834 3506
1835static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3507static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1836 3508
1837#if EV_USE_INOTIFY 3509#if EV_USE_INOTIFY
1838# define EV_INOTIFY_BUFSIZE 8192 3510
3511/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3512# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1839 3513
1840static void noinline 3514static void noinline
1841infy_add (EV_P_ ev_stat *w) 3515infy_add (EV_P_ ev_stat *w)
1842{ 3516{
1843 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); 3517 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);
1844 3518
1845 if (w->wd < 0) 3519 if (w->wd >= 0)
3520 {
3521 struct statfs sfs;
3522
3523 /* now local changes will be tracked by inotify, but remote changes won't */
3524 /* unless the filesystem is known to be local, we therefore still poll */
3525 /* also do poll on <2.6.25, but with normal frequency */
3526
3527 if (!fs_2625)
3528 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3529 else if (!statfs (w->path, &sfs)
3530 && (sfs.f_type == 0x1373 /* devfs */
3531 || sfs.f_type == 0xEF53 /* ext2/3 */
3532 || sfs.f_type == 0x3153464a /* jfs */
3533 || sfs.f_type == 0x52654973 /* reiser3 */
3534 || sfs.f_type == 0x01021994 /* tempfs */
3535 || sfs.f_type == 0x58465342 /* xfs */))
3536 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3537 else
3538 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1846 { 3539 }
1847 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3540 else
3541 {
3542 /* can't use inotify, continue to stat */
3543 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1848 3544
1849 /* monitor some parent directory for speedup hints */ 3545 /* if path is not there, monitor some parent directory for speedup hints */
3546 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3547 /* but an efficiency issue only */
1850 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3548 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1851 { 3549 {
1852 char path [4096]; 3550 char path [4096];
1853 strcpy (path, w->path); 3551 strcpy (path, w->path);
1854 3552
… …
1857 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3555 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1858 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3556 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1859 3557
1860 char *pend = strrchr (path, '/'); 3558 char *pend = strrchr (path, '/');
1861 3559
1862 if (!pend) 3560 if (!pend || pend == path)
1863 break; /* whoops, no '/', complain to your admin */ 3561 break;
1864 3562
1865 *pend = 0; 3563 *pend = 0;
1866 w->wd = inotify_add_watch (fs_fd, path, mask); 3564 w->wd = inotify_add_watch (fs_fd, path, mask);
1867 } 3565 }
1868 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3566 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1869 } 3567 }
1870 } 3568 }
1871 else
1872 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1873 3569
1874 if (w->wd >= 0) 3570 if (w->wd >= 0)
1875 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3571 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3572
3573 /* now re-arm timer, if required */
3574 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3575 ev_timer_again (EV_A_ &w->timer);
3576 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1876} 3577}
1877 3578
1878static void noinline 3579static void noinline
1879infy_del (EV_P_ ev_stat *w) 3580infy_del (EV_P_ ev_stat *w)
1880{ 3581{
… …
1883 3584
1884 if (wd < 0) 3585 if (wd < 0)
1885 return; 3586 return;
1886 3587
1887 w->wd = -2; 3588 w->wd = -2;
1888 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3589 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1889 wlist_del (&fs_hash [slot].head, (WL)w); 3590 wlist_del (&fs_hash [slot].head, (WL)w);
1890 3591
1891 /* remove this watcher, if others are watching it, they will rearm */ 3592 /* remove this watcher, if others are watching it, they will rearm */
1892 inotify_rm_watch (fs_fd, wd); 3593 inotify_rm_watch (fs_fd, wd);
1893} 3594}
1894 3595
1895static void noinline 3596static void noinline
1896infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3597infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1897{ 3598{
1898 if (slot < 0) 3599 if (slot < 0)
1899 /* overflow, need to check for all hahs slots */ 3600 /* overflow, need to check for all hash slots */
1900 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3601 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1901 infy_wd (EV_A_ slot, wd, ev); 3602 infy_wd (EV_A_ slot, wd, ev);
1902 else 3603 else
1903 { 3604 {
1904 WL w_; 3605 WL w_;
1905 3606
1906 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3607 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1907 { 3608 {
1908 ev_stat *w = (ev_stat *)w_; 3609 ev_stat *w = (ev_stat *)w_;
1909 w_ = w_->next; /* lets us remove this watcher and all before it */ 3610 w_ = w_->next; /* lets us remove this watcher and all before it */
1910 3611
1911 if (w->wd == wd || wd == -1) 3612 if (w->wd == wd || wd == -1)
1912 { 3613 {
1913 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3614 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1914 { 3615 {
3616 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1915 w->wd = -1; 3617 w->wd = -1;
1916 infy_add (EV_A_ w); /* re-add, no matter what */ 3618 infy_add (EV_A_ w); /* re-add, no matter what */
1917 } 3619 }
1918 3620
1919 stat_timer_cb (EV_A_ &w->timer, 0); 3621 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1924 3626
1925static void 3627static void
1926infy_cb (EV_P_ ev_io *w, int revents) 3628infy_cb (EV_P_ ev_io *w, int revents)
1927{ 3629{
1928 char buf [EV_INOTIFY_BUFSIZE]; 3630 char buf [EV_INOTIFY_BUFSIZE];
1929 struct inotify_event *ev = (struct inotify_event *)buf;
1930 int ofs; 3631 int ofs;
1931 int len = read (fs_fd, buf, sizeof (buf)); 3632 int len = read (fs_fd, buf, sizeof (buf));
1932 3633
1933 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3634 for (ofs = 0; ofs < len; )
3635 {
3636 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1934 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3637 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3638 ofs += sizeof (struct inotify_event) + ev->len;
3639 }
1935} 3640}
1936 3641
1937void inline_size 3642inline_size void ecb_cold
3643ev_check_2625 (EV_P)
3644{
3645 /* kernels < 2.6.25 are borked
3646 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3647 */
3648 if (ev_linux_version () < 0x020619)
3649 return;
3650
3651 fs_2625 = 1;
3652}
3653
3654inline_size int
3655infy_newfd (void)
3656{
3657#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3658 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3659 if (fd >= 0)
3660 return fd;
3661#endif
3662 return inotify_init ();
3663}
3664
3665inline_size void
1938infy_init (EV_P) 3666infy_init (EV_P)
1939{ 3667{
1940 if (fs_fd != -2) 3668 if (fs_fd != -2)
1941 return; 3669 return;
1942 3670
3671 fs_fd = -1;
3672
3673 ev_check_2625 (EV_A);
3674
1943 fs_fd = inotify_init (); 3675 fs_fd = infy_newfd ();
1944 3676
1945 if (fs_fd >= 0) 3677 if (fs_fd >= 0)
1946 { 3678 {
3679 fd_intern (fs_fd);
1947 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3680 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1948 ev_set_priority (&fs_w, EV_MAXPRI); 3681 ev_set_priority (&fs_w, EV_MAXPRI);
1949 ev_io_start (EV_A_ &fs_w); 3682 ev_io_start (EV_A_ &fs_w);
3683 ev_unref (EV_A);
1950 } 3684 }
1951} 3685}
1952 3686
1953void inline_size 3687inline_size void
1954infy_fork (EV_P) 3688infy_fork (EV_P)
1955{ 3689{
1956 int slot; 3690 int slot;
1957 3691
1958 if (fs_fd < 0) 3692 if (fs_fd < 0)
1959 return; 3693 return;
1960 3694
3695 ev_ref (EV_A);
3696 ev_io_stop (EV_A_ &fs_w);
1961 close (fs_fd); 3697 close (fs_fd);
1962 fs_fd = inotify_init (); 3698 fs_fd = infy_newfd ();
1963 3699
3700 if (fs_fd >= 0)
3701 {
3702 fd_intern (fs_fd);
3703 ev_io_set (&fs_w, fs_fd, EV_READ);
3704 ev_io_start (EV_A_ &fs_w);
3705 ev_unref (EV_A);
3706 }
3707
1964 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3708 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1965 { 3709 {
1966 WL w_ = fs_hash [slot].head; 3710 WL w_ = fs_hash [slot].head;
1967 fs_hash [slot].head = 0; 3711 fs_hash [slot].head = 0;
1968 3712
1969 while (w_) 3713 while (w_)
… …
1974 w->wd = -1; 3718 w->wd = -1;
1975 3719
1976 if (fs_fd >= 0) 3720 if (fs_fd >= 0)
1977 infy_add (EV_A_ w); /* re-add, no matter what */ 3721 infy_add (EV_A_ w); /* re-add, no matter what */
1978 else 3722 else
3723 {
3724 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3725 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1979 ev_timer_start (EV_A_ &w->timer); 3726 ev_timer_again (EV_A_ &w->timer);
3727 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3728 }
1980 } 3729 }
1981
1982 } 3730 }
1983} 3731}
1984 3732
3733#endif
3734
3735#ifdef _WIN32
3736# define EV_LSTAT(p,b) _stati64 (p, b)
3737#else
3738# define EV_LSTAT(p,b) lstat (p, b)
1985#endif 3739#endif
1986 3740
1987void 3741void
1988ev_stat_stat (EV_P_ ev_stat *w) 3742ev_stat_stat (EV_P_ ev_stat *w)
1989{ 3743{
… …
1996static void noinline 3750static void noinline
1997stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3751stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1998{ 3752{
1999 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3753 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2000 3754
2001 /* we copy this here each the time so that */ 3755 ev_statdata prev = w->attr;
2002 /* prev has the old value when the callback gets invoked */
2003 w->prev = w->attr;
2004 ev_stat_stat (EV_A_ w); 3756 ev_stat_stat (EV_A_ w);
2005 3757
2006 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3758 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2007 if ( 3759 if (
2008 w->prev.st_dev != w->attr.st_dev 3760 prev.st_dev != w->attr.st_dev
2009 || w->prev.st_ino != w->attr.st_ino 3761 || prev.st_ino != w->attr.st_ino
2010 || w->prev.st_mode != w->attr.st_mode 3762 || prev.st_mode != w->attr.st_mode
2011 || w->prev.st_nlink != w->attr.st_nlink 3763 || prev.st_nlink != w->attr.st_nlink
2012 || w->prev.st_uid != w->attr.st_uid 3764 || prev.st_uid != w->attr.st_uid
2013 || w->prev.st_gid != w->attr.st_gid 3765 || prev.st_gid != w->attr.st_gid
2014 || w->prev.st_rdev != w->attr.st_rdev 3766 || prev.st_rdev != w->attr.st_rdev
2015 || w->prev.st_size != w->attr.st_size 3767 || prev.st_size != w->attr.st_size
2016 || w->prev.st_atime != w->attr.st_atime 3768 || prev.st_atime != w->attr.st_atime
2017 || w->prev.st_mtime != w->attr.st_mtime 3769 || prev.st_mtime != w->attr.st_mtime
2018 || w->prev.st_ctime != w->attr.st_ctime 3770 || prev.st_ctime != w->attr.st_ctime
2019 ) { 3771 ) {
3772 /* we only update w->prev on actual differences */
3773 /* in case we test more often than invoke the callback, */
3774 /* to ensure that prev is always different to attr */
3775 w->prev = prev;
3776
2020 #if EV_USE_INOTIFY 3777 #if EV_USE_INOTIFY
3778 if (fs_fd >= 0)
3779 {
2021 infy_del (EV_A_ w); 3780 infy_del (EV_A_ w);
2022 infy_add (EV_A_ w); 3781 infy_add (EV_A_ w);
2023 ev_stat_stat (EV_A_ w); /* avoid race... */ 3782 ev_stat_stat (EV_A_ w); /* avoid race... */
3783 }
2024 #endif 3784 #endif
2025 3785
2026 ev_feed_event (EV_A_ w, EV_STAT); 3786 ev_feed_event (EV_A_ w, EV_STAT);
2027 } 3787 }
2028} 3788}
… …
2031ev_stat_start (EV_P_ ev_stat *w) 3791ev_stat_start (EV_P_ ev_stat *w)
2032{ 3792{
2033 if (expect_false (ev_is_active (w))) 3793 if (expect_false (ev_is_active (w)))
2034 return; 3794 return;
2035 3795
2036 /* since we use memcmp, we need to clear any padding data etc. */
2037 memset (&w->prev, 0, sizeof (ev_statdata));
2038 memset (&w->attr, 0, sizeof (ev_statdata));
2039
2040 ev_stat_stat (EV_A_ w); 3796 ev_stat_stat (EV_A_ w);
2041 3797
3798 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2042 if (w->interval < MIN_STAT_INTERVAL) 3799 w->interval = MIN_STAT_INTERVAL;
2043 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2044 3800
2045 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3801 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2046 ev_set_priority (&w->timer, ev_priority (w)); 3802 ev_set_priority (&w->timer, ev_priority (w));
2047 3803
2048#if EV_USE_INOTIFY 3804#if EV_USE_INOTIFY
2049 infy_init (EV_A); 3805 infy_init (EV_A);
2050 3806
2051 if (fs_fd >= 0) 3807 if (fs_fd >= 0)
2052 infy_add (EV_A_ w); 3808 infy_add (EV_A_ w);
2053 else 3809 else
2054#endif 3810#endif
3811 {
2055 ev_timer_start (EV_A_ &w->timer); 3812 ev_timer_again (EV_A_ &w->timer);
3813 ev_unref (EV_A);
3814 }
2056 3815
2057 ev_start (EV_A_ (W)w, 1); 3816 ev_start (EV_A_ (W)w, 1);
3817
3818 EV_FREQUENT_CHECK;
2058} 3819}
2059 3820
2060void 3821void
2061ev_stat_stop (EV_P_ ev_stat *w) 3822ev_stat_stop (EV_P_ ev_stat *w)
2062{ 3823{
2063 clear_pending (EV_A_ (W)w); 3824 clear_pending (EV_A_ (W)w);
2064 if (expect_false (!ev_is_active (w))) 3825 if (expect_false (!ev_is_active (w)))
2065 return; 3826 return;
2066 3827
3828 EV_FREQUENT_CHECK;
3829
2067#if EV_USE_INOTIFY 3830#if EV_USE_INOTIFY
2068 infy_del (EV_A_ w); 3831 infy_del (EV_A_ w);
2069#endif 3832#endif
3833
3834 if (ev_is_active (&w->timer))
3835 {
3836 ev_ref (EV_A);
2070 ev_timer_stop (EV_A_ &w->timer); 3837 ev_timer_stop (EV_A_ &w->timer);
3838 }
2071 3839
2072 ev_stop (EV_A_ (W)w); 3840 ev_stop (EV_A_ (W)w);
3841
3842 EV_FREQUENT_CHECK;
2073} 3843}
2074#endif 3844#endif
2075 3845
2076#if EV_IDLE_ENABLE 3846#if EV_IDLE_ENABLE
2077void 3847void
… …
2080 if (expect_false (ev_is_active (w))) 3850 if (expect_false (ev_is_active (w)))
2081 return; 3851 return;
2082 3852
2083 pri_adjust (EV_A_ (W)w); 3853 pri_adjust (EV_A_ (W)w);
2084 3854
3855 EV_FREQUENT_CHECK;
3856
2085 { 3857 {
2086 int active = ++idlecnt [ABSPRI (w)]; 3858 int active = ++idlecnt [ABSPRI (w)];
2087 3859
2088 ++idleall; 3860 ++idleall;
2089 ev_start (EV_A_ (W)w, active); 3861 ev_start (EV_A_ (W)w, active);
2090 3862
2091 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3863 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2092 idles [ABSPRI (w)][active - 1] = w; 3864 idles [ABSPRI (w)][active - 1] = w;
2093 } 3865 }
3866
3867 EV_FREQUENT_CHECK;
2094} 3868}
2095 3869
2096void 3870void
2097ev_idle_stop (EV_P_ ev_idle *w) 3871ev_idle_stop (EV_P_ ev_idle *w)
2098{ 3872{
2099 clear_pending (EV_A_ (W)w); 3873 clear_pending (EV_A_ (W)w);
2100 if (expect_false (!ev_is_active (w))) 3874 if (expect_false (!ev_is_active (w)))
2101 return; 3875 return;
2102 3876
3877 EV_FREQUENT_CHECK;
3878
2103 { 3879 {
2104 int active = ((W)w)->active; 3880 int active = ev_active (w);
2105 3881
2106 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3882 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2107 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3883 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2108 3884
2109 ev_stop (EV_A_ (W)w); 3885 ev_stop (EV_A_ (W)w);
2110 --idleall; 3886 --idleall;
2111 } 3887 }
2112}
2113#endif
2114 3888
3889 EV_FREQUENT_CHECK;
3890}
3891#endif
3892
3893#if EV_PREPARE_ENABLE
2115void 3894void
2116ev_prepare_start (EV_P_ ev_prepare *w) 3895ev_prepare_start (EV_P_ ev_prepare *w)
2117{ 3896{
2118 if (expect_false (ev_is_active (w))) 3897 if (expect_false (ev_is_active (w)))
2119 return; 3898 return;
3899
3900 EV_FREQUENT_CHECK;
2120 3901
2121 ev_start (EV_A_ (W)w, ++preparecnt); 3902 ev_start (EV_A_ (W)w, ++preparecnt);
2122 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3903 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2123 prepares [preparecnt - 1] = w; 3904 prepares [preparecnt - 1] = w;
3905
3906 EV_FREQUENT_CHECK;
2124} 3907}
2125 3908
2126void 3909void
2127ev_prepare_stop (EV_P_ ev_prepare *w) 3910ev_prepare_stop (EV_P_ ev_prepare *w)
2128{ 3911{
2129 clear_pending (EV_A_ (W)w); 3912 clear_pending (EV_A_ (W)w);
2130 if (expect_false (!ev_is_active (w))) 3913 if (expect_false (!ev_is_active (w)))
2131 return; 3914 return;
2132 3915
3916 EV_FREQUENT_CHECK;
3917
2133 { 3918 {
2134 int active = ((W)w)->active; 3919 int active = ev_active (w);
3920
2135 prepares [active - 1] = prepares [--preparecnt]; 3921 prepares [active - 1] = prepares [--preparecnt];
2136 ((W)prepares [active - 1])->active = active; 3922 ev_active (prepares [active - 1]) = active;
2137 } 3923 }
2138 3924
2139 ev_stop (EV_A_ (W)w); 3925 ev_stop (EV_A_ (W)w);
2140}
2141 3926
3927 EV_FREQUENT_CHECK;
3928}
3929#endif
3930
3931#if EV_CHECK_ENABLE
2142void 3932void
2143ev_check_start (EV_P_ ev_check *w) 3933ev_check_start (EV_P_ ev_check *w)
2144{ 3934{
2145 if (expect_false (ev_is_active (w))) 3935 if (expect_false (ev_is_active (w)))
2146 return; 3936 return;
3937
3938 EV_FREQUENT_CHECK;
2147 3939
2148 ev_start (EV_A_ (W)w, ++checkcnt); 3940 ev_start (EV_A_ (W)w, ++checkcnt);
2149 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3941 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2150 checks [checkcnt - 1] = w; 3942 checks [checkcnt - 1] = w;
3943
3944 EV_FREQUENT_CHECK;
2151} 3945}
2152 3946
2153void 3947void
2154ev_check_stop (EV_P_ ev_check *w) 3948ev_check_stop (EV_P_ ev_check *w)
2155{ 3949{
2156 clear_pending (EV_A_ (W)w); 3950 clear_pending (EV_A_ (W)w);
2157 if (expect_false (!ev_is_active (w))) 3951 if (expect_false (!ev_is_active (w)))
2158 return; 3952 return;
2159 3953
3954 EV_FREQUENT_CHECK;
3955
2160 { 3956 {
2161 int active = ((W)w)->active; 3957 int active = ev_active (w);
3958
2162 checks [active - 1] = checks [--checkcnt]; 3959 checks [active - 1] = checks [--checkcnt];
2163 ((W)checks [active - 1])->active = active; 3960 ev_active (checks [active - 1]) = active;
2164 } 3961 }
2165 3962
2166 ev_stop (EV_A_ (W)w); 3963 ev_stop (EV_A_ (W)w);
3964
3965 EV_FREQUENT_CHECK;
2167} 3966}
3967#endif
2168 3968
2169#if EV_EMBED_ENABLE 3969#if EV_EMBED_ENABLE
2170void noinline 3970void noinline
2171ev_embed_sweep (EV_P_ ev_embed *w) 3971ev_embed_sweep (EV_P_ ev_embed *w)
2172{ 3972{
2173 ev_loop (w->loop, EVLOOP_NONBLOCK); 3973 ev_run (w->other, EVRUN_NOWAIT);
2174} 3974}
2175 3975
2176static void 3976static void
2177embed_cb (EV_P_ ev_io *io, int revents) 3977embed_io_cb (EV_P_ ev_io *io, int revents)
2178{ 3978{
2179 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3979 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2180 3980
2181 if (ev_cb (w)) 3981 if (ev_cb (w))
2182 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3982 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2183 else 3983 else
2184 ev_embed_sweep (loop, w); 3984 ev_run (w->other, EVRUN_NOWAIT);
2185} 3985}
3986
3987static void
3988embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3989{
3990 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3991
3992 {
3993 EV_P = w->other;
3994
3995 while (fdchangecnt)
3996 {
3997 fd_reify (EV_A);
3998 ev_run (EV_A_ EVRUN_NOWAIT);
3999 }
4000 }
4001}
4002
4003static void
4004embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4005{
4006 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4007
4008 ev_embed_stop (EV_A_ w);
4009
4010 {
4011 EV_P = w->other;
4012
4013 ev_loop_fork (EV_A);
4014 ev_run (EV_A_ EVRUN_NOWAIT);
4015 }
4016
4017 ev_embed_start (EV_A_ w);
4018}
4019
4020#if 0
4021static void
4022embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4023{
4024 ev_idle_stop (EV_A_ idle);
4025}
4026#endif
2186 4027
2187void 4028void
2188ev_embed_start (EV_P_ ev_embed *w) 4029ev_embed_start (EV_P_ ev_embed *w)
2189{ 4030{
2190 if (expect_false (ev_is_active (w))) 4031 if (expect_false (ev_is_active (w)))
2191 return; 4032 return;
2192 4033
2193 { 4034 {
2194 struct ev_loop *loop = w->loop; 4035 EV_P = w->other;
2195 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4036 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2196 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4037 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2197 } 4038 }
4039
4040 EV_FREQUENT_CHECK;
2198 4041
2199 ev_set_priority (&w->io, ev_priority (w)); 4042 ev_set_priority (&w->io, ev_priority (w));
2200 ev_io_start (EV_A_ &w->io); 4043 ev_io_start (EV_A_ &w->io);
2201 4044
4045 ev_prepare_init (&w->prepare, embed_prepare_cb);
4046 ev_set_priority (&w->prepare, EV_MINPRI);
4047 ev_prepare_start (EV_A_ &w->prepare);
4048
4049 ev_fork_init (&w->fork, embed_fork_cb);
4050 ev_fork_start (EV_A_ &w->fork);
4051
4052 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4053
2202 ev_start (EV_A_ (W)w, 1); 4054 ev_start (EV_A_ (W)w, 1);
4055
4056 EV_FREQUENT_CHECK;
2203} 4057}
2204 4058
2205void 4059void
2206ev_embed_stop (EV_P_ ev_embed *w) 4060ev_embed_stop (EV_P_ ev_embed *w)
2207{ 4061{
2208 clear_pending (EV_A_ (W)w); 4062 clear_pending (EV_A_ (W)w);
2209 if (expect_false (!ev_is_active (w))) 4063 if (expect_false (!ev_is_active (w)))
2210 return; 4064 return;
2211 4065
4066 EV_FREQUENT_CHECK;
4067
2212 ev_io_stop (EV_A_ &w->io); 4068 ev_io_stop (EV_A_ &w->io);
4069 ev_prepare_stop (EV_A_ &w->prepare);
4070 ev_fork_stop (EV_A_ &w->fork);
2213 4071
2214 ev_stop (EV_A_ (W)w); 4072 ev_stop (EV_A_ (W)w);
4073
4074 EV_FREQUENT_CHECK;
2215} 4075}
2216#endif 4076#endif
2217 4077
2218#if EV_FORK_ENABLE 4078#if EV_FORK_ENABLE
2219void 4079void
2220ev_fork_start (EV_P_ ev_fork *w) 4080ev_fork_start (EV_P_ ev_fork *w)
2221{ 4081{
2222 if (expect_false (ev_is_active (w))) 4082 if (expect_false (ev_is_active (w)))
2223 return; 4083 return;
2224 4084
4085 EV_FREQUENT_CHECK;
4086
2225 ev_start (EV_A_ (W)w, ++forkcnt); 4087 ev_start (EV_A_ (W)w, ++forkcnt);
2226 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4088 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2227 forks [forkcnt - 1] = w; 4089 forks [forkcnt - 1] = w;
4090
4091 EV_FREQUENT_CHECK;
2228} 4092}
2229 4093
2230void 4094void
2231ev_fork_stop (EV_P_ ev_fork *w) 4095ev_fork_stop (EV_P_ ev_fork *w)
2232{ 4096{
2233 clear_pending (EV_A_ (W)w); 4097 clear_pending (EV_A_ (W)w);
2234 if (expect_false (!ev_is_active (w))) 4098 if (expect_false (!ev_is_active (w)))
2235 return; 4099 return;
2236 4100
4101 EV_FREQUENT_CHECK;
4102
2237 { 4103 {
2238 int active = ((W)w)->active; 4104 int active = ev_active (w);
4105
2239 forks [active - 1] = forks [--forkcnt]; 4106 forks [active - 1] = forks [--forkcnt];
2240 ((W)forks [active - 1])->active = active; 4107 ev_active (forks [active - 1]) = active;
2241 } 4108 }
2242 4109
2243 ev_stop (EV_A_ (W)w); 4110 ev_stop (EV_A_ (W)w);
4111
4112 EV_FREQUENT_CHECK;
4113}
4114#endif
4115
4116#if EV_CLEANUP_ENABLE
4117void
4118ev_cleanup_start (EV_P_ ev_cleanup *w)
4119{
4120 if (expect_false (ev_is_active (w)))
4121 return;
4122
4123 EV_FREQUENT_CHECK;
4124
4125 ev_start (EV_A_ (W)w, ++cleanupcnt);
4126 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4127 cleanups [cleanupcnt - 1] = w;
4128
4129 /* cleanup watchers should never keep a refcount on the loop */
4130 ev_unref (EV_A);
4131 EV_FREQUENT_CHECK;
4132}
4133
4134void
4135ev_cleanup_stop (EV_P_ ev_cleanup *w)
4136{
4137 clear_pending (EV_A_ (W)w);
4138 if (expect_false (!ev_is_active (w)))
4139 return;
4140
4141 EV_FREQUENT_CHECK;
4142 ev_ref (EV_A);
4143
4144 {
4145 int active = ev_active (w);
4146
4147 cleanups [active - 1] = cleanups [--cleanupcnt];
4148 ev_active (cleanups [active - 1]) = active;
4149 }
4150
4151 ev_stop (EV_A_ (W)w);
4152
4153 EV_FREQUENT_CHECK;
4154}
4155#endif
4156
4157#if EV_ASYNC_ENABLE
4158void
4159ev_async_start (EV_P_ ev_async *w)
4160{
4161 if (expect_false (ev_is_active (w)))
4162 return;
4163
4164 w->sent = 0;
4165
4166 evpipe_init (EV_A);
4167
4168 EV_FREQUENT_CHECK;
4169
4170 ev_start (EV_A_ (W)w, ++asynccnt);
4171 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4172 asyncs [asynccnt - 1] = w;
4173
4174 EV_FREQUENT_CHECK;
4175}
4176
4177void
4178ev_async_stop (EV_P_ ev_async *w)
4179{
4180 clear_pending (EV_A_ (W)w);
4181 if (expect_false (!ev_is_active (w)))
4182 return;
4183
4184 EV_FREQUENT_CHECK;
4185
4186 {
4187 int active = ev_active (w);
4188
4189 asyncs [active - 1] = asyncs [--asynccnt];
4190 ev_active (asyncs [active - 1]) = active;
4191 }
4192
4193 ev_stop (EV_A_ (W)w);
4194
4195 EV_FREQUENT_CHECK;
4196}
4197
4198void
4199ev_async_send (EV_P_ ev_async *w)
4200{
4201 w->sent = 1;
4202 evpipe_write (EV_A_ &async_pending);
2244} 4203}
2245#endif 4204#endif
2246 4205
2247/*****************************************************************************/ 4206/*****************************************************************************/
2248 4207
… …
2258once_cb (EV_P_ struct ev_once *once, int revents) 4217once_cb (EV_P_ struct ev_once *once, int revents)
2259{ 4218{
2260 void (*cb)(int revents, void *arg) = once->cb; 4219 void (*cb)(int revents, void *arg) = once->cb;
2261 void *arg = once->arg; 4220 void *arg = once->arg;
2262 4221
2263 ev_io_stop (EV_A_ &once->io); 4222 ev_io_stop (EV_A_ &once->io);
2264 ev_timer_stop (EV_A_ &once->to); 4223 ev_timer_stop (EV_A_ &once->to);
2265 ev_free (once); 4224 ev_free (once);
2266 4225
2267 cb (revents, arg); 4226 cb (revents, arg);
2268} 4227}
2269 4228
2270static void 4229static void
2271once_cb_io (EV_P_ ev_io *w, int revents) 4230once_cb_io (EV_P_ ev_io *w, int revents)
2272{ 4231{
2273 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4232 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4233
4234 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2274} 4235}
2275 4236
2276static void 4237static void
2277once_cb_to (EV_P_ ev_timer *w, int revents) 4238once_cb_to (EV_P_ ev_timer *w, int revents)
2278{ 4239{
2279 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4240 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4241
4242 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2280} 4243}
2281 4244
2282void 4245void
2283ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4246ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2284{ 4247{
2285 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4248 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2286 4249
2287 if (expect_false (!once)) 4250 if (expect_false (!once))
2288 { 4251 {
2289 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4252 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2290 return; 4253 return;
2291 } 4254 }
2292 4255
2293 once->cb = cb; 4256 once->cb = cb;
2294 once->arg = arg; 4257 once->arg = arg;
… …
2306 ev_timer_set (&once->to, timeout, 0.); 4269 ev_timer_set (&once->to, timeout, 0.);
2307 ev_timer_start (EV_A_ &once->to); 4270 ev_timer_start (EV_A_ &once->to);
2308 } 4271 }
2309} 4272}
2310 4273
2311#ifdef __cplusplus 4274/*****************************************************************************/
2312} 4275
4276#if EV_WALK_ENABLE
4277void ecb_cold
4278ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4279{
4280 int i, j;
4281 ev_watcher_list *wl, *wn;
4282
4283 if (types & (EV_IO | EV_EMBED))
4284 for (i = 0; i < anfdmax; ++i)
4285 for (wl = anfds [i].head; wl; )
4286 {
4287 wn = wl->next;
4288
4289#if EV_EMBED_ENABLE
4290 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4291 {
4292 if (types & EV_EMBED)
4293 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4294 }
4295 else
4296#endif
4297#if EV_USE_INOTIFY
4298 if (ev_cb ((ev_io *)wl) == infy_cb)
4299 ;
4300 else
4301#endif
4302 if ((ev_io *)wl != &pipe_w)
4303 if (types & EV_IO)
4304 cb (EV_A_ EV_IO, wl);
4305
4306 wl = wn;
4307 }
4308
4309 if (types & (EV_TIMER | EV_STAT))
4310 for (i = timercnt + HEAP0; i-- > HEAP0; )
4311#if EV_STAT_ENABLE
4312 /*TODO: timer is not always active*/
4313 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4314 {
4315 if (types & EV_STAT)
4316 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4317 }
4318 else
4319#endif
4320 if (types & EV_TIMER)
4321 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4322
4323#if EV_PERIODIC_ENABLE
4324 if (types & EV_PERIODIC)
4325 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4326 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4327#endif
4328
4329#if EV_IDLE_ENABLE
4330 if (types & EV_IDLE)
4331 for (j = NUMPRI; j--; )
4332 for (i = idlecnt [j]; i--; )
4333 cb (EV_A_ EV_IDLE, idles [j][i]);
4334#endif
4335
4336#if EV_FORK_ENABLE
4337 if (types & EV_FORK)
4338 for (i = forkcnt; i--; )
4339 if (ev_cb (forks [i]) != embed_fork_cb)
4340 cb (EV_A_ EV_FORK, forks [i]);
4341#endif
4342
4343#if EV_ASYNC_ENABLE
4344 if (types & EV_ASYNC)
4345 for (i = asynccnt; i--; )
4346 cb (EV_A_ EV_ASYNC, asyncs [i]);
4347#endif
4348
4349#if EV_PREPARE_ENABLE
4350 if (types & EV_PREPARE)
4351 for (i = preparecnt; i--; )
4352# if EV_EMBED_ENABLE
4353 if (ev_cb (prepares [i]) != embed_prepare_cb)
2313#endif 4354# endif
4355 cb (EV_A_ EV_PREPARE, prepares [i]);
4356#endif
2314 4357
4358#if EV_CHECK_ENABLE
4359 if (types & EV_CHECK)
4360 for (i = checkcnt; i--; )
4361 cb (EV_A_ EV_CHECK, checks [i]);
4362#endif
4363
4364#if EV_SIGNAL_ENABLE
4365 if (types & EV_SIGNAL)
4366 for (i = 0; i < EV_NSIG - 1; ++i)
4367 for (wl = signals [i].head; wl; )
4368 {
4369 wn = wl->next;
4370 cb (EV_A_ EV_SIGNAL, wl);
4371 wl = wn;
4372 }
4373#endif
4374
4375#if EV_CHILD_ENABLE
4376 if (types & EV_CHILD)
4377 for (i = (EV_PID_HASHSIZE); i--; )
4378 for (wl = childs [i]; wl; )
4379 {
4380 wn = wl->next;
4381 cb (EV_A_ EV_CHILD, wl);
4382 wl = wn;
4383 }
4384#endif
4385/* EV_STAT 0x00001000 /* stat data changed */
4386/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4387}
4388#endif
4389
4390#if EV_MULTIPLICITY
4391 #include "ev_wrap.h"
4392#endif
4393
4394EV_CPP(})
4395

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