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Comparing libev/ev.c (file contents):
Revision 1.181 by root, Wed Dec 12 00:17:08 2007 UTC vs.
Revision 1.388 by root, Fri Jul 29 12:17:26 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
235#if __GNUC__ >= 3 466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
236# define expect(expr,value) __builtin_expect ((expr),(value)) 467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
237# define noinline __attribute__ ((noinline)) 468
469/* the following are taken from libecb */
470/* ecb.h start */
471
472/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers.
475 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place.
478 */
479#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
481 #define ECB_GCC_VERSION(major,minor) 0
482 #else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
484 #endif
485#endif
486
487#if __cplusplus
488 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__
491#elif ECB_C99
492 #define ecb_inline static inline
238#else 493#else
239# define expect(expr,value) (expr) 494 #define ecb_inline static
240# define noinline
241# if __STDC_VERSION__ < 199901L
242# define inline
243# endif 495#endif
496
497#ifndef ECB_MEMORY_FENCE
498 #if ECB_GCC_VERSION(2,5)
499 #if __x86
500 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
501 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
502 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */
503 #elif __amd64
504 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
505 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
506 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
507 #endif
244#endif 508 #endif
509#endif
245 510
511#ifndef ECB_MEMORY_FENCE
512 #if ECB_GCC_VERSION(4,4)
513 #define ECB_MEMORY_FENCE __sync_synchronize ()
514 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
515 #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
516 #elif _MSC_VER >= 1400 && 0 /* TODO: only true when using volatiles */
517 #define ECB_MEMORY_FENCE do { } while (0)
518 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
519 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
520 #elif defined(_WIN32)
521 #include <WinNT.h>
522 #define ECB_MEMORY_FENCE MemoryBarrier ()
523 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
524 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
525 #endif
526#endif
527
528#ifndef ECB_MEMORY_FENCE
529 #include <pthread.h>
530
531 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
532 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
533 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
534 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
535#endif
536
537#if ECB_GCC_VERSION(3,1)
538 #define ecb_attribute(attrlist) __attribute__(attrlist)
539 #define ecb_is_constant(expr) __builtin_constant_p (expr)
540 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
541 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
542#else
543 #define ecb_attribute(attrlist)
544 #define ecb_is_constant(expr) 0
545 #define ecb_expect(expr,value) (expr)
546 #define ecb_prefetch(addr,rw,locality)
547#endif
548
549#define ecb_noinline ecb_attribute ((__noinline__))
550#define ecb_noreturn ecb_attribute ((__noreturn__))
551#define ecb_unused ecb_attribute ((__unused__))
552#define ecb_const ecb_attribute ((__const__))
553#define ecb_pure ecb_attribute ((__pure__))
554
555#if ECB_GCC_VERSION(4,3)
556 #define ecb_artificial ecb_attribute ((__artificial__))
557 #define ecb_hot ecb_attribute ((__hot__))
558 #define ecb_cold ecb_attribute ((__cold__))
559#else
560 #define ecb_artificial
561 #define ecb_hot
562 #define ecb_cold
563#endif
564
565/* put around conditional expressions if you are very sure that the */
566/* expression is mostly true or mostly false. note that these return */
567/* booleans, not the expression. */
246#define expect_false(expr) expect ((expr) != 0, 0) 568#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
247#define expect_true(expr) expect ((expr) != 0, 1) 569#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
570/* ecb.h end */
571
572#define expect_false(cond) ecb_expect_false (cond)
573#define expect_true(cond) ecb_expect_true (cond)
574#define noinline ecb_noinline
575
248#define inline_size static inline 576#define inline_size ecb_inline
249 577
250#if EV_MINIMAL 578#if EV_FEATURE_CODE
579# define inline_speed ecb_inline
580#else
251# define inline_speed static noinline 581# define inline_speed static noinline
582#endif
583
584#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
585
586#if EV_MINPRI == EV_MAXPRI
587# define ABSPRI(w) (((W)w), 0)
252#else 588#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) 589# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
590#endif
258 591
259#define EMPTY /* required for microsofts broken pseudo-c compiler */ 592#define EMPTY /* required for microsofts broken pseudo-c compiler */
260#define EMPTY2(a,b) /* used to suppress some warnings */ 593#define EMPTY2(a,b) /* used to suppress some warnings */
261 594
262typedef ev_watcher *W; 595typedef ev_watcher *W;
263typedef ev_watcher_list *WL; 596typedef ev_watcher_list *WL;
264typedef ev_watcher_time *WT; 597typedef ev_watcher_time *WT;
265 598
599#define ev_active(w) ((W)(w))->active
600#define ev_at(w) ((WT)(w))->at
601
602#if EV_USE_REALTIME
603/* sig_atomic_t is used to avoid per-thread variables or locking but still */
604/* giving it a reasonably high chance of working on typical architectures */
605static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
606#endif
607
608#if EV_USE_MONOTONIC
266static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 609static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
610#endif
611
612#ifndef EV_FD_TO_WIN32_HANDLE
613# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
614#endif
615#ifndef EV_WIN32_HANDLE_TO_FD
616# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
617#endif
618#ifndef EV_WIN32_CLOSE_FD
619# define EV_WIN32_CLOSE_FD(fd) close (fd)
620#endif
267 621
268#ifdef _WIN32 622#ifdef _WIN32
269# include "ev_win32.c" 623# include "ev_win32.c"
270#endif 624#endif
271 625
272/*****************************************************************************/ 626/*****************************************************************************/
273 627
628/* define a suitable floor function (only used by periodics atm) */
629
630#if EV_USE_FLOOR
631# include <math.h>
632# define ev_floor(v) floor (v)
633#else
634
635#include <float.h>
636
637/* a floor() replacement function, should be independent of ev_tstamp type */
638static ev_tstamp noinline
639ev_floor (ev_tstamp v)
640{
641 /* the choice of shift factor is not terribly important */
642#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
643 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
644#else
645 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
646#endif
647
648 /* argument too large for an unsigned long? */
649 if (expect_false (v >= shift))
650 {
651 ev_tstamp f;
652
653 if (v == v - 1.)
654 return v; /* very large number */
655
656 f = shift * ev_floor (v * (1. / shift));
657 return f + ev_floor (v - f);
658 }
659
660 /* special treatment for negative args? */
661 if (expect_false (v < 0.))
662 {
663 ev_tstamp f = -ev_floor (-v);
664
665 return f - (f == v ? 0 : 1);
666 }
667
668 /* fits into an unsigned long */
669 return (unsigned long)v;
670}
671
672#endif
673
674/*****************************************************************************/
675
676#ifdef __linux
677# include <sys/utsname.h>
678#endif
679
680static unsigned int noinline ecb_cold
681ev_linux_version (void)
682{
683#ifdef __linux
684 unsigned int v = 0;
685 struct utsname buf;
686 int i;
687 char *p = buf.release;
688
689 if (uname (&buf))
690 return 0;
691
692 for (i = 3+1; --i; )
693 {
694 unsigned int c = 0;
695
696 for (;;)
697 {
698 if (*p >= '0' && *p <= '9')
699 c = c * 10 + *p++ - '0';
700 else
701 {
702 p += *p == '.';
703 break;
704 }
705 }
706
707 v = (v << 8) | c;
708 }
709
710 return v;
711#else
712 return 0;
713#endif
714}
715
716/*****************************************************************************/
717
718#if EV_AVOID_STDIO
719static void noinline ecb_cold
720ev_printerr (const char *msg)
721{
722 write (STDERR_FILENO, msg, strlen (msg));
723}
724#endif
725
274static void (*syserr_cb)(const char *msg); 726static void (*syserr_cb)(const char *msg);
275 727
276void 728void ecb_cold
277ev_set_syserr_cb (void (*cb)(const char *msg)) 729ev_set_syserr_cb (void (*cb)(const char *msg))
278{ 730{
279 syserr_cb = cb; 731 syserr_cb = cb;
280} 732}
281 733
282static void noinline 734static void noinline ecb_cold
283syserr (const char *msg) 735ev_syserr (const char *msg)
284{ 736{
285 if (!msg) 737 if (!msg)
286 msg = "(libev) system error"; 738 msg = "(libev) system error";
287 739
288 if (syserr_cb) 740 if (syserr_cb)
289 syserr_cb (msg); 741 syserr_cb (msg);
290 else 742 else
291 { 743 {
744#if EV_AVOID_STDIO
745 ev_printerr (msg);
746 ev_printerr (": ");
747 ev_printerr (strerror (errno));
748 ev_printerr ("\n");
749#else
292 perror (msg); 750 perror (msg);
751#endif
293 abort (); 752 abort ();
294 } 753 }
295} 754}
296 755
756static void *
757ev_realloc_emul (void *ptr, long size)
758{
759#if __GLIBC__
760 return realloc (ptr, size);
761#else
762 /* some systems, notably openbsd and darwin, fail to properly
763 * implement realloc (x, 0) (as required by both ansi c-89 and
764 * the single unix specification, so work around them here.
765 */
766
767 if (size)
768 return realloc (ptr, size);
769
770 free (ptr);
771 return 0;
772#endif
773}
774
297static void *(*alloc)(void *ptr, long size); 775static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
298 776
299void 777void ecb_cold
300ev_set_allocator (void *(*cb)(void *ptr, long size)) 778ev_set_allocator (void *(*cb)(void *ptr, long size))
301{ 779{
302 alloc = cb; 780 alloc = cb;
303} 781}
304 782
305inline_speed void * 783inline_speed void *
306ev_realloc (void *ptr, long size) 784ev_realloc (void *ptr, long size)
307{ 785{
308 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 786 ptr = alloc (ptr, size);
309 787
310 if (!ptr && size) 788 if (!ptr && size)
311 { 789 {
790#if EV_AVOID_STDIO
791 ev_printerr ("(libev) memory allocation failed, aborting.\n");
792#else
312 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 793 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
794#endif
313 abort (); 795 abort ();
314 } 796 }
315 797
316 return ptr; 798 return ptr;
317} 799}
… …
319#define ev_malloc(size) ev_realloc (0, (size)) 801#define ev_malloc(size) ev_realloc (0, (size))
320#define ev_free(ptr) ev_realloc ((ptr), 0) 802#define ev_free(ptr) ev_realloc ((ptr), 0)
321 803
322/*****************************************************************************/ 804/*****************************************************************************/
323 805
806/* set in reify when reification needed */
807#define EV_ANFD_REIFY 1
808
809/* file descriptor info structure */
324typedef struct 810typedef struct
325{ 811{
326 WL head; 812 WL head;
327 unsigned char events; 813 unsigned char events; /* the events watched for */
814 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
815 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
328 unsigned char reify; 816 unsigned char unused;
817#if EV_USE_EPOLL
818 unsigned int egen; /* generation counter to counter epoll bugs */
819#endif
329#if EV_SELECT_IS_WINSOCKET 820#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
330 SOCKET handle; 821 SOCKET handle;
331#endif 822#endif
823#if EV_USE_IOCP
824 OVERLAPPED or, ow;
825#endif
332} ANFD; 826} ANFD;
333 827
828/* stores the pending event set for a given watcher */
334typedef struct 829typedef struct
335{ 830{
336 W w; 831 W w;
337 int events; 832 int events; /* the pending event set for the given watcher */
338} ANPENDING; 833} ANPENDING;
339 834
340#if EV_USE_INOTIFY 835#if EV_USE_INOTIFY
836/* hash table entry per inotify-id */
341typedef struct 837typedef struct
342{ 838{
343 WL head; 839 WL head;
344} ANFS; 840} ANFS;
841#endif
842
843/* Heap Entry */
844#if EV_HEAP_CACHE_AT
845 /* a heap element */
846 typedef struct {
847 ev_tstamp at;
848 WT w;
849 } ANHE;
850
851 #define ANHE_w(he) (he).w /* access watcher, read-write */
852 #define ANHE_at(he) (he).at /* access cached at, read-only */
853 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
854#else
855 /* a heap element */
856 typedef WT ANHE;
857
858 #define ANHE_w(he) (he)
859 #define ANHE_at(he) (he)->at
860 #define ANHE_at_cache(he)
345#endif 861#endif
346 862
347#if EV_MULTIPLICITY 863#if EV_MULTIPLICITY
348 864
349 struct ev_loop 865 struct ev_loop
… …
368 884
369 static int ev_default_loop_ptr; 885 static int ev_default_loop_ptr;
370 886
371#endif 887#endif
372 888
889#if EV_FEATURE_API
890# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
891# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
892# define EV_INVOKE_PENDING invoke_cb (EV_A)
893#else
894# define EV_RELEASE_CB (void)0
895# define EV_ACQUIRE_CB (void)0
896# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
897#endif
898
899#define EVBREAK_RECURSE 0x80
900
373/*****************************************************************************/ 901/*****************************************************************************/
374 902
903#ifndef EV_HAVE_EV_TIME
375ev_tstamp 904ev_tstamp
376ev_time (void) 905ev_time (void)
377{ 906{
378#if EV_USE_REALTIME 907#if EV_USE_REALTIME
908 if (expect_true (have_realtime))
909 {
379 struct timespec ts; 910 struct timespec ts;
380 clock_gettime (CLOCK_REALTIME, &ts); 911 clock_gettime (CLOCK_REALTIME, &ts);
381 return ts.tv_sec + ts.tv_nsec * 1e-9; 912 return ts.tv_sec + ts.tv_nsec * 1e-9;
382#else 913 }
914#endif
915
383 struct timeval tv; 916 struct timeval tv;
384 gettimeofday (&tv, 0); 917 gettimeofday (&tv, 0);
385 return tv.tv_sec + tv.tv_usec * 1e-6; 918 return tv.tv_sec + tv.tv_usec * 1e-6;
386#endif
387} 919}
920#endif
388 921
389ev_tstamp inline_size 922inline_size ev_tstamp
390get_clock (void) 923get_clock (void)
391{ 924{
392#if EV_USE_MONOTONIC 925#if EV_USE_MONOTONIC
393 if (expect_true (have_monotonic)) 926 if (expect_true (have_monotonic))
394 { 927 {
… …
407{ 940{
408 return ev_rt_now; 941 return ev_rt_now;
409} 942}
410#endif 943#endif
411 944
412int inline_size 945void
946ev_sleep (ev_tstamp delay)
947{
948 if (delay > 0.)
949 {
950#if EV_USE_NANOSLEEP
951 struct timespec ts;
952
953 EV_TS_SET (ts, delay);
954 nanosleep (&ts, 0);
955#elif defined(_WIN32)
956 Sleep ((unsigned long)(delay * 1e3));
957#else
958 struct timeval tv;
959
960 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
961 /* something not guaranteed by newer posix versions, but guaranteed */
962 /* by older ones */
963 EV_TV_SET (tv, delay);
964 select (0, 0, 0, 0, &tv);
965#endif
966 }
967}
968
969/*****************************************************************************/
970
971#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
972
973/* find a suitable new size for the given array, */
974/* hopefully by rounding to a nice-to-malloc size */
975inline_size int
413array_nextsize (int elem, int cur, int cnt) 976array_nextsize (int elem, int cur, int cnt)
414{ 977{
415 int ncur = cur + 1; 978 int ncur = cur + 1;
416 979
417 do 980 do
418 ncur <<= 1; 981 ncur <<= 1;
419 while (cnt > ncur); 982 while (cnt > ncur);
420 983
421 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 984 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
422 if (elem * ncur > 4096) 985 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
423 { 986 {
424 ncur *= elem; 987 ncur *= elem;
425 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 988 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
426 ncur = ncur - sizeof (void *) * 4; 989 ncur = ncur - sizeof (void *) * 4;
427 ncur /= elem; 990 ncur /= elem;
428 } 991 }
429 992
430 return ncur; 993 return ncur;
431} 994}
432 995
433static noinline void * 996static void * noinline ecb_cold
434array_realloc (int elem, void *base, int *cur, int cnt) 997array_realloc (int elem, void *base, int *cur, int cnt)
435{ 998{
436 *cur = array_nextsize (elem, *cur, cnt); 999 *cur = array_nextsize (elem, *cur, cnt);
437 return ev_realloc (base, elem * *cur); 1000 return ev_realloc (base, elem * *cur);
438} 1001}
1002
1003#define array_init_zero(base,count) \
1004 memset ((void *)(base), 0, sizeof (*(base)) * (count))
439 1005
440#define array_needsize(type,base,cur,cnt,init) \ 1006#define array_needsize(type,base,cur,cnt,init) \
441 if (expect_false ((cnt) > (cur))) \ 1007 if (expect_false ((cnt) > (cur))) \
442 { \ 1008 { \
443 int ocur_ = (cur); \ 1009 int ecb_unused ocur_ = (cur); \
444 (base) = (type *)array_realloc \ 1010 (base) = (type *)array_realloc \
445 (sizeof (type), (base), &(cur), (cnt)); \ 1011 (sizeof (type), (base), &(cur), (cnt)); \
446 init ((base) + (ocur_), (cur) - ocur_); \ 1012 init ((base) + (ocur_), (cur) - ocur_); \
447 } 1013 }
448 1014
… …
455 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1021 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
456 } 1022 }
457#endif 1023#endif
458 1024
459#define array_free(stem, idx) \ 1025#define array_free(stem, idx) \
460 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1026 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
461 1027
462/*****************************************************************************/ 1028/*****************************************************************************/
1029
1030/* dummy callback for pending events */
1031static void noinline
1032pendingcb (EV_P_ ev_prepare *w, int revents)
1033{
1034}
463 1035
464void noinline 1036void noinline
465ev_feed_event (EV_P_ void *w, int revents) 1037ev_feed_event (EV_P_ void *w, int revents)
466{ 1038{
467 W w_ = (W)w; 1039 W w_ = (W)w;
… …
476 pendings [pri][w_->pending - 1].w = w_; 1048 pendings [pri][w_->pending - 1].w = w_;
477 pendings [pri][w_->pending - 1].events = revents; 1049 pendings [pri][w_->pending - 1].events = revents;
478 } 1050 }
479} 1051}
480 1052
481void inline_speed 1053inline_speed void
1054feed_reverse (EV_P_ W w)
1055{
1056 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1057 rfeeds [rfeedcnt++] = w;
1058}
1059
1060inline_size void
1061feed_reverse_done (EV_P_ int revents)
1062{
1063 do
1064 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1065 while (rfeedcnt);
1066}
1067
1068inline_speed void
482queue_events (EV_P_ W *events, int eventcnt, int type) 1069queue_events (EV_P_ W *events, int eventcnt, int type)
483{ 1070{
484 int i; 1071 int i;
485 1072
486 for (i = 0; i < eventcnt; ++i) 1073 for (i = 0; i < eventcnt; ++i)
487 ev_feed_event (EV_A_ events [i], type); 1074 ev_feed_event (EV_A_ events [i], type);
488} 1075}
489 1076
490/*****************************************************************************/ 1077/*****************************************************************************/
491 1078
492void inline_size 1079inline_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) 1080fd_event_nocheck (EV_P_ int fd, int revents)
507{ 1081{
508 ANFD *anfd = anfds + fd; 1082 ANFD *anfd = anfds + fd;
509 ev_io *w; 1083 ev_io *w;
510 1084
511 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1085 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
515 if (ev) 1089 if (ev)
516 ev_feed_event (EV_A_ (W)w, ev); 1090 ev_feed_event (EV_A_ (W)w, ev);
517 } 1091 }
518} 1092}
519 1093
1094/* do not submit kernel events for fds that have reify set */
1095/* because that means they changed while we were polling for new events */
1096inline_speed void
1097fd_event (EV_P_ int fd, int revents)
1098{
1099 ANFD *anfd = anfds + fd;
1100
1101 if (expect_true (!anfd->reify))
1102 fd_event_nocheck (EV_A_ fd, revents);
1103}
1104
520void 1105void
521ev_feed_fd_event (EV_P_ int fd, int revents) 1106ev_feed_fd_event (EV_P_ int fd, int revents)
522{ 1107{
523 if (fd >= 0 && fd < anfdmax) 1108 if (fd >= 0 && fd < anfdmax)
524 fd_event (EV_A_ fd, revents); 1109 fd_event_nocheck (EV_A_ fd, revents);
525} 1110}
526 1111
527void inline_size 1112/* make sure the external fd watch events are in-sync */
1113/* with the kernel/libev internal state */
1114inline_size void
528fd_reify (EV_P) 1115fd_reify (EV_P)
529{ 1116{
530 int i; 1117 int i;
1118
1119#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1120 for (i = 0; i < fdchangecnt; ++i)
1121 {
1122 int fd = fdchanges [i];
1123 ANFD *anfd = anfds + fd;
1124
1125 if (anfd->reify & EV__IOFDSET && anfd->head)
1126 {
1127 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1128
1129 if (handle != anfd->handle)
1130 {
1131 unsigned long arg;
1132
1133 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1134
1135 /* handle changed, but fd didn't - we need to do it in two steps */
1136 backend_modify (EV_A_ fd, anfd->events, 0);
1137 anfd->events = 0;
1138 anfd->handle = handle;
1139 }
1140 }
1141 }
1142#endif
531 1143
532 for (i = 0; i < fdchangecnt; ++i) 1144 for (i = 0; i < fdchangecnt; ++i)
533 { 1145 {
534 int fd = fdchanges [i]; 1146 int fd = fdchanges [i];
535 ANFD *anfd = anfds + fd; 1147 ANFD *anfd = anfds + fd;
536 ev_io *w; 1148 ev_io *w;
537 1149
538 int events = 0; 1150 unsigned char o_events = anfd->events;
1151 unsigned char o_reify = anfd->reify;
539 1152
540 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1153 anfd->reify = 0;
541 events |= w->events;
542 1154
543#if EV_SELECT_IS_WINSOCKET 1155 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
544 if (events)
545 { 1156 {
546 unsigned long argp; 1157 anfd->events = 0;
547 anfd->handle = _get_osfhandle (fd); 1158
548 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1159 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1160 anfd->events |= (unsigned char)w->events;
1161
1162 if (o_events != anfd->events)
1163 o_reify = EV__IOFDSET; /* actually |= */
549 } 1164 }
550#endif
551 1165
552 anfd->reify = 0; 1166 if (o_reify & EV__IOFDSET)
553
554 backend_modify (EV_A_ fd, anfd->events, events); 1167 backend_modify (EV_A_ fd, o_events, anfd->events);
555 anfd->events = events;
556 } 1168 }
557 1169
558 fdchangecnt = 0; 1170 fdchangecnt = 0;
559} 1171}
560 1172
561void inline_size 1173/* something about the given fd changed */
1174inline_size void
562fd_change (EV_P_ int fd) 1175fd_change (EV_P_ int fd, int flags)
563{ 1176{
564 if (expect_false (anfds [fd].reify)) 1177 unsigned char reify = anfds [fd].reify;
565 return;
566
567 anfds [fd].reify = 1; 1178 anfds [fd].reify |= flags;
568 1179
1180 if (expect_true (!reify))
1181 {
569 ++fdchangecnt; 1182 ++fdchangecnt;
570 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1183 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
571 fdchanges [fdchangecnt - 1] = fd; 1184 fdchanges [fdchangecnt - 1] = fd;
1185 }
572} 1186}
573 1187
574void inline_speed 1188/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1189inline_speed void ecb_cold
575fd_kill (EV_P_ int fd) 1190fd_kill (EV_P_ int fd)
576{ 1191{
577 ev_io *w; 1192 ev_io *w;
578 1193
579 while ((w = (ev_io *)anfds [fd].head)) 1194 while ((w = (ev_io *)anfds [fd].head))
… …
581 ev_io_stop (EV_A_ w); 1196 ev_io_stop (EV_A_ w);
582 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1197 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
583 } 1198 }
584} 1199}
585 1200
586int inline_size 1201/* check whether the given fd is actually valid, for error recovery */
1202inline_size int ecb_cold
587fd_valid (int fd) 1203fd_valid (int fd)
588{ 1204{
589#ifdef _WIN32 1205#ifdef _WIN32
590 return _get_osfhandle (fd) != -1; 1206 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
591#else 1207#else
592 return fcntl (fd, F_GETFD) != -1; 1208 return fcntl (fd, F_GETFD) != -1;
593#endif 1209#endif
594} 1210}
595 1211
596/* called on EBADF to verify fds */ 1212/* called on EBADF to verify fds */
597static void noinline 1213static void noinline ecb_cold
598fd_ebadf (EV_P) 1214fd_ebadf (EV_P)
599{ 1215{
600 int fd; 1216 int fd;
601 1217
602 for (fd = 0; fd < anfdmax; ++fd) 1218 for (fd = 0; fd < anfdmax; ++fd)
603 if (anfds [fd].events) 1219 if (anfds [fd].events)
604 if (!fd_valid (fd) == -1 && errno == EBADF) 1220 if (!fd_valid (fd) && errno == EBADF)
605 fd_kill (EV_A_ fd); 1221 fd_kill (EV_A_ fd);
606} 1222}
607 1223
608/* called on ENOMEM in select/poll to kill some fds and retry */ 1224/* called on ENOMEM in select/poll to kill some fds and retry */
609static void noinline 1225static void noinline ecb_cold
610fd_enomem (EV_P) 1226fd_enomem (EV_P)
611{ 1227{
612 int fd; 1228 int fd;
613 1229
614 for (fd = anfdmax; fd--; ) 1230 for (fd = anfdmax; fd--; )
615 if (anfds [fd].events) 1231 if (anfds [fd].events)
616 { 1232 {
617 fd_kill (EV_A_ fd); 1233 fd_kill (EV_A_ fd);
618 return; 1234 break;
619 } 1235 }
620} 1236}
621 1237
622/* usually called after fork if backend needs to re-arm all fds from scratch */ 1238/* usually called after fork if backend needs to re-arm all fds from scratch */
623static void noinline 1239static void noinline
… …
627 1243
628 for (fd = 0; fd < anfdmax; ++fd) 1244 for (fd = 0; fd < anfdmax; ++fd)
629 if (anfds [fd].events) 1245 if (anfds [fd].events)
630 { 1246 {
631 anfds [fd].events = 0; 1247 anfds [fd].events = 0;
632 fd_change (EV_A_ fd); 1248 anfds [fd].emask = 0;
1249 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
633 } 1250 }
634} 1251}
635 1252
636/*****************************************************************************/ 1253/* used to prepare libev internal fd's */
637 1254/* this is not fork-safe */
638void inline_speed 1255inline_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) 1256fd_intern (int fd)
774{ 1257{
775#ifdef _WIN32 1258#ifdef _WIN32
776 int arg = 1; 1259 unsigned long arg = 1;
777 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1260 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
778#else 1261#else
779 fcntl (fd, F_SETFD, FD_CLOEXEC); 1262 fcntl (fd, F_SETFD, FD_CLOEXEC);
780 fcntl (fd, F_SETFL, O_NONBLOCK); 1263 fcntl (fd, F_SETFL, O_NONBLOCK);
781#endif 1264#endif
782} 1265}
783 1266
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/*****************************************************************************/ 1267/*****************************************************************************/
796 1268
797static ev_child *childs [EV_PID_HASHSIZE]; 1269/*
1270 * the heap functions want a real array index. array index 0 is guaranteed to not
1271 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1272 * the branching factor of the d-tree.
1273 */
798 1274
1275/*
1276 * at the moment we allow libev the luxury of two heaps,
1277 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1278 * which is more cache-efficient.
1279 * the difference is about 5% with 50000+ watchers.
1280 */
1281#if EV_USE_4HEAP
1282
1283#define DHEAP 4
1284#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1285#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1286#define UPHEAP_DONE(p,k) ((p) == (k))
1287
1288/* away from the root */
1289inline_speed void
1290downheap (ANHE *heap, int N, int k)
1291{
1292 ANHE he = heap [k];
1293 ANHE *E = heap + N + HEAP0;
1294
1295 for (;;)
1296 {
1297 ev_tstamp minat;
1298 ANHE *minpos;
1299 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1300
1301 /* find minimum child */
1302 if (expect_true (pos + DHEAP - 1 < E))
1303 {
1304 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1305 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1306 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1307 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1308 }
1309 else if (pos < E)
1310 {
1311 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1312 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1313 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1314 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1315 }
1316 else
1317 break;
1318
1319 if (ANHE_at (he) <= minat)
1320 break;
1321
1322 heap [k] = *minpos;
1323 ev_active (ANHE_w (*minpos)) = k;
1324
1325 k = minpos - heap;
1326 }
1327
1328 heap [k] = he;
1329 ev_active (ANHE_w (he)) = k;
1330}
1331
1332#else /* 4HEAP */
1333
1334#define HEAP0 1
1335#define HPARENT(k) ((k) >> 1)
1336#define UPHEAP_DONE(p,k) (!(p))
1337
1338/* away from the root */
1339inline_speed void
1340downheap (ANHE *heap, int N, int k)
1341{
1342 ANHE he = heap [k];
1343
1344 for (;;)
1345 {
1346 int c = k << 1;
1347
1348 if (c >= N + HEAP0)
1349 break;
1350
1351 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1352 ? 1 : 0;
1353
1354 if (ANHE_at (he) <= ANHE_at (heap [c]))
1355 break;
1356
1357 heap [k] = heap [c];
1358 ev_active (ANHE_w (heap [k])) = k;
1359
1360 k = c;
1361 }
1362
1363 heap [k] = he;
1364 ev_active (ANHE_w (he)) = k;
1365}
1366#endif
1367
1368/* towards the root */
1369inline_speed void
1370upheap (ANHE *heap, int k)
1371{
1372 ANHE he = heap [k];
1373
1374 for (;;)
1375 {
1376 int p = HPARENT (k);
1377
1378 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1379 break;
1380
1381 heap [k] = heap [p];
1382 ev_active (ANHE_w (heap [k])) = k;
1383 k = p;
1384 }
1385
1386 heap [k] = he;
1387 ev_active (ANHE_w (he)) = k;
1388}
1389
1390/* move an element suitably so it is in a correct place */
1391inline_size void
1392adjustheap (ANHE *heap, int N, int k)
1393{
1394 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1395 upheap (heap, k);
1396 else
1397 downheap (heap, N, k);
1398}
1399
1400/* rebuild the heap: this function is used only once and executed rarely */
1401inline_size void
1402reheap (ANHE *heap, int N)
1403{
1404 int i;
1405
1406 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1407 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1408 for (i = 0; i < N; ++i)
1409 upheap (heap, i + HEAP0);
1410}
1411
1412/*****************************************************************************/
1413
1414/* associate signal watchers to a signal signal */
1415typedef struct
1416{
1417 EV_ATOMIC_T pending;
1418#if EV_MULTIPLICITY
1419 EV_P;
1420#endif
1421 WL head;
1422} ANSIG;
1423
1424static ANSIG signals [EV_NSIG - 1];
1425
1426/*****************************************************************************/
1427
1428#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1429
1430static void noinline ecb_cold
1431evpipe_init (EV_P)
1432{
1433 if (!ev_is_active (&pipe_w))
1434 {
1435# if EV_USE_EVENTFD
1436 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1437 if (evfd < 0 && errno == EINVAL)
1438 evfd = eventfd (0, 0);
1439
1440 if (evfd >= 0)
1441 {
1442 evpipe [0] = -1;
1443 fd_intern (evfd); /* doing it twice doesn't hurt */
1444 ev_io_set (&pipe_w, evfd, EV_READ);
1445 }
1446 else
1447# endif
1448 {
1449 while (pipe (evpipe))
1450 ev_syserr ("(libev) error creating signal/async pipe");
1451
1452 fd_intern (evpipe [0]);
1453 fd_intern (evpipe [1]);
1454 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1455 }
1456
1457 ev_io_start (EV_A_ &pipe_w);
1458 ev_unref (EV_A); /* watcher should not keep loop alive */
1459 }
1460}
1461
1462inline_speed void
1463evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1464{
1465 if (expect_true (*flag))
1466 return;
1467
1468 *flag = 1;
1469
1470 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1471
1472 pipe_write_skipped = 1;
1473
1474 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1475
1476 if (pipe_write_wanted)
1477 {
1478 int old_errno;
1479
1480 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1481
1482 old_errno = errno; /* save errno because write will clobber it */
1483
1484#if EV_USE_EVENTFD
1485 if (evfd >= 0)
1486 {
1487 uint64_t counter = 1;
1488 write (evfd, &counter, sizeof (uint64_t));
1489 }
1490 else
1491#endif
1492 {
1493 /* win32 people keep sending patches that change this write() to send() */
1494 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1495 /* so when you think this write should be a send instead, please find out */
1496 /* where your send() is from - it's definitely not the microsoft send, and */
1497 /* tell me. thank you. */
1498 write (evpipe [1], &(evpipe [1]), 1);
1499 }
1500
1501 errno = old_errno;
1502 }
1503}
1504
1505/* called whenever the libev signal pipe */
1506/* got some events (signal, async) */
1507static void
1508pipecb (EV_P_ ev_io *iow, int revents)
1509{
1510 int i;
1511
1512 if (revents & EV_READ)
1513 {
1514#if EV_USE_EVENTFD
1515 if (evfd >= 0)
1516 {
1517 uint64_t counter;
1518 read (evfd, &counter, sizeof (uint64_t));
1519 }
1520 else
1521#endif
1522 {
1523 char dummy;
1524 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1525 read (evpipe [0], &dummy, 1);
1526 }
1527 }
1528
1529 pipe_write_skipped = 0;
1530
1531#if EV_SIGNAL_ENABLE
1532 if (sig_pending)
1533 {
1534 sig_pending = 0;
1535
1536 for (i = EV_NSIG - 1; i--; )
1537 if (expect_false (signals [i].pending))
1538 ev_feed_signal_event (EV_A_ i + 1);
1539 }
1540#endif
1541
1542#if EV_ASYNC_ENABLE
1543 if (async_pending)
1544 {
1545 async_pending = 0;
1546
1547 for (i = asynccnt; i--; )
1548 if (asyncs [i]->sent)
1549 {
1550 asyncs [i]->sent = 0;
1551 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1552 }
1553 }
1554#endif
1555}
1556
1557/*****************************************************************************/
1558
1559void
1560ev_feed_signal (int signum)
1561{
1562#if EV_MULTIPLICITY
1563 EV_P = signals [signum - 1].loop;
1564
1565 if (!EV_A)
1566 return;
1567#endif
1568
1569 if (!ev_active (&pipe_w))
1570 return;
1571
1572 signals [signum - 1].pending = 1;
1573 evpipe_write (EV_A_ &sig_pending);
1574}
1575
1576static void
1577ev_sighandler (int signum)
1578{
799#ifndef _WIN32 1579#ifdef _WIN32
1580 signal (signum, ev_sighandler);
1581#endif
1582
1583 ev_feed_signal (signum);
1584}
1585
1586void noinline
1587ev_feed_signal_event (EV_P_ int signum)
1588{
1589 WL w;
1590
1591 if (expect_false (signum <= 0 || signum > EV_NSIG))
1592 return;
1593
1594 --signum;
1595
1596#if EV_MULTIPLICITY
1597 /* it is permissible to try to feed a signal to the wrong loop */
1598 /* or, likely more useful, feeding a signal nobody is waiting for */
1599
1600 if (expect_false (signals [signum].loop != EV_A))
1601 return;
1602#endif
1603
1604 signals [signum].pending = 0;
1605
1606 for (w = signals [signum].head; w; w = w->next)
1607 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1608}
1609
1610#if EV_USE_SIGNALFD
1611static void
1612sigfdcb (EV_P_ ev_io *iow, int revents)
1613{
1614 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1615
1616 for (;;)
1617 {
1618 ssize_t res = read (sigfd, si, sizeof (si));
1619
1620 /* not ISO-C, as res might be -1, but works with SuS */
1621 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1622 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1623
1624 if (res < (ssize_t)sizeof (si))
1625 break;
1626 }
1627}
1628#endif
1629
1630#endif
1631
1632/*****************************************************************************/
1633
1634#if EV_CHILD_ENABLE
1635static WL childs [EV_PID_HASHSIZE];
800 1636
801static ev_signal childev; 1637static ev_signal childev;
802 1638
803void inline_speed 1639#ifndef WIFCONTINUED
1640# define WIFCONTINUED(status) 0
1641#endif
1642
1643/* handle a single child status event */
1644inline_speed void
804child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1645child_reap (EV_P_ int chain, int pid, int status)
805{ 1646{
806 ev_child *w; 1647 ev_child *w;
1648 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
807 1649
808 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1650 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1651 {
809 if (w->pid == pid || !w->pid) 1652 if ((w->pid == pid || !w->pid)
1653 && (!traced || (w->flags & 1)))
810 { 1654 {
811 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1655 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; 1656 w->rpid = pid;
813 w->rstatus = status; 1657 w->rstatus = status;
814 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1658 ev_feed_event (EV_A_ (W)w, EV_CHILD);
815 } 1659 }
1660 }
816} 1661}
817 1662
818#ifndef WCONTINUED 1663#ifndef WCONTINUED
819# define WCONTINUED 0 1664# define WCONTINUED 0
820#endif 1665#endif
821 1666
1667/* called on sigchld etc., calls waitpid */
822static void 1668static void
823childcb (EV_P_ ev_signal *sw, int revents) 1669childcb (EV_P_ ev_signal *sw, int revents)
824{ 1670{
825 int pid, status; 1671 int pid, status;
826 1672
… …
829 if (!WCONTINUED 1675 if (!WCONTINUED
830 || errno != EINVAL 1676 || errno != EINVAL
831 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1677 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
832 return; 1678 return;
833 1679
834 /* make sure we are called again until all childs have been reaped */ 1680 /* 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 */ 1681 /* 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); 1682 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
837 1683
838 child_reap (EV_A_ sw, pid, pid, status); 1684 child_reap (EV_A_ pid, pid, status);
839 if (EV_PID_HASHSIZE > 1) 1685 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 */ 1686 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
841} 1687}
842 1688
843#endif 1689#endif
844 1690
845/*****************************************************************************/ 1691/*****************************************************************************/
846 1692
1693#if EV_USE_IOCP
1694# include "ev_iocp.c"
1695#endif
847#if EV_USE_PORT 1696#if EV_USE_PORT
848# include "ev_port.c" 1697# include "ev_port.c"
849#endif 1698#endif
850#if EV_USE_KQUEUE 1699#if EV_USE_KQUEUE
851# include "ev_kqueue.c" 1700# include "ev_kqueue.c"
… …
858#endif 1707#endif
859#if EV_USE_SELECT 1708#if EV_USE_SELECT
860# include "ev_select.c" 1709# include "ev_select.c"
861#endif 1710#endif
862 1711
863int 1712int ecb_cold
864ev_version_major (void) 1713ev_version_major (void)
865{ 1714{
866 return EV_VERSION_MAJOR; 1715 return EV_VERSION_MAJOR;
867} 1716}
868 1717
869int 1718int ecb_cold
870ev_version_minor (void) 1719ev_version_minor (void)
871{ 1720{
872 return EV_VERSION_MINOR; 1721 return EV_VERSION_MINOR;
873} 1722}
874 1723
875/* return true if we are running with elevated privileges and should ignore env variables */ 1724/* return true if we are running with elevated privileges and should ignore env variables */
876int inline_size 1725int inline_size ecb_cold
877enable_secure (void) 1726enable_secure (void)
878{ 1727{
879#ifdef _WIN32 1728#ifdef _WIN32
880 return 0; 1729 return 0;
881#else 1730#else
882 return getuid () != geteuid () 1731 return getuid () != geteuid ()
883 || getgid () != getegid (); 1732 || getgid () != getegid ();
884#endif 1733#endif
885} 1734}
886 1735
887unsigned int 1736unsigned int ecb_cold
888ev_supported_backends (void) 1737ev_supported_backends (void)
889{ 1738{
890 unsigned int flags = 0; 1739 unsigned int flags = 0;
891 1740
892 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1741 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
896 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1745 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
897 1746
898 return flags; 1747 return flags;
899} 1748}
900 1749
901unsigned int 1750unsigned int ecb_cold
902ev_recommended_backends (void) 1751ev_recommended_backends (void)
903{ 1752{
904 unsigned int flags = ev_supported_backends (); 1753 unsigned int flags = ev_supported_backends ();
905 1754
906#ifndef __NetBSD__ 1755#ifndef __NetBSD__
907 /* kqueue is borked on everything but netbsd apparently */ 1756 /* kqueue is borked on everything but netbsd apparently */
908 /* it usually doesn't work correctly on anything but sockets and pipes */ 1757 /* it usually doesn't work correctly on anything but sockets and pipes */
909 flags &= ~EVBACKEND_KQUEUE; 1758 flags &= ~EVBACKEND_KQUEUE;
910#endif 1759#endif
911#ifdef __APPLE__ 1760#ifdef __APPLE__
912 // flags &= ~EVBACKEND_KQUEUE; for documentation 1761 /* only select works correctly on that "unix-certified" platform */
913 flags &= ~EVBACKEND_POLL; 1762 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1763 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1764#endif
1765#ifdef __FreeBSD__
1766 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
914#endif 1767#endif
915 1768
916 return flags; 1769 return flags;
917} 1770}
918 1771
919unsigned int 1772unsigned int ecb_cold
920ev_embeddable_backends (void) 1773ev_embeddable_backends (void)
921{ 1774{
922 return EVBACKEND_EPOLL 1775 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
923 | EVBACKEND_KQUEUE 1776
924 | EVBACKEND_PORT; 1777 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1778 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1779 flags &= ~EVBACKEND_EPOLL;
1780
1781 return flags;
925} 1782}
926 1783
927unsigned int 1784unsigned int
928ev_backend (EV_P) 1785ev_backend (EV_P)
929{ 1786{
930 return backend; 1787 return backend;
931} 1788}
932 1789
1790#if EV_FEATURE_API
933unsigned int 1791unsigned int
934ev_loop_count (EV_P) 1792ev_iteration (EV_P)
935{ 1793{
936 return loop_count; 1794 return loop_count;
937} 1795}
938 1796
1797unsigned int
1798ev_depth (EV_P)
1799{
1800 return loop_depth;
1801}
1802
1803void
1804ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1805{
1806 io_blocktime = interval;
1807}
1808
1809void
1810ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1811{
1812 timeout_blocktime = interval;
1813}
1814
1815void
1816ev_set_userdata (EV_P_ void *data)
1817{
1818 userdata = data;
1819}
1820
1821void *
1822ev_userdata (EV_P)
1823{
1824 return userdata;
1825}
1826
1827void
1828ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1829{
1830 invoke_cb = invoke_pending_cb;
1831}
1832
1833void
1834ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1835{
1836 release_cb = release;
1837 acquire_cb = acquire;
1838}
1839#endif
1840
1841/* initialise a loop structure, must be zero-initialised */
939static void noinline 1842static void noinline ecb_cold
940loop_init (EV_P_ unsigned int flags) 1843loop_init (EV_P_ unsigned int flags)
941{ 1844{
942 if (!backend) 1845 if (!backend)
943 { 1846 {
1847 origflags = flags;
1848
1849#if EV_USE_REALTIME
1850 if (!have_realtime)
1851 {
1852 struct timespec ts;
1853
1854 if (!clock_gettime (CLOCK_REALTIME, &ts))
1855 have_realtime = 1;
1856 }
1857#endif
1858
944#if EV_USE_MONOTONIC 1859#if EV_USE_MONOTONIC
1860 if (!have_monotonic)
945 { 1861 {
946 struct timespec ts; 1862 struct timespec ts;
1863
947 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1864 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
948 have_monotonic = 1; 1865 have_monotonic = 1;
949 } 1866 }
950#endif 1867#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 1868
957 /* pid check not overridable via env */ 1869 /* pid check not overridable via env */
958#ifndef _WIN32 1870#ifndef _WIN32
959 if (flags & EVFLAG_FORKCHECK) 1871 if (flags & EVFLAG_FORKCHECK)
960 curpid = getpid (); 1872 curpid = getpid ();
… …
963 if (!(flags & EVFLAG_NOENV) 1875 if (!(flags & EVFLAG_NOENV)
964 && !enable_secure () 1876 && !enable_secure ()
965 && getenv ("LIBEV_FLAGS")) 1877 && getenv ("LIBEV_FLAGS"))
966 flags = atoi (getenv ("LIBEV_FLAGS")); 1878 flags = atoi (getenv ("LIBEV_FLAGS"));
967 1879
968 if (!(flags & 0x0000ffffUL)) 1880 ev_rt_now = ev_time ();
1881 mn_now = get_clock ();
1882 now_floor = mn_now;
1883 rtmn_diff = ev_rt_now - mn_now;
1884#if EV_FEATURE_API
1885 invoke_cb = ev_invoke_pending;
1886#endif
1887
1888 io_blocktime = 0.;
1889 timeout_blocktime = 0.;
1890 backend = 0;
1891 backend_fd = -1;
1892 sig_pending = 0;
1893#if EV_ASYNC_ENABLE
1894 async_pending = 0;
1895#endif
1896 pipe_write_skipped = 0;
1897 pipe_write_wanted = 0;
1898#if EV_USE_INOTIFY
1899 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1900#endif
1901#if EV_USE_SIGNALFD
1902 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1903#endif
1904
1905 if (!(flags & EVBACKEND_MASK))
969 flags |= ev_recommended_backends (); 1906 flags |= ev_recommended_backends ();
970 1907
971 backend = 0;
972 backend_fd = -1;
973#if EV_USE_INOTIFY 1908#if EV_USE_IOCP
974 fs_fd = -2; 1909 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
975#endif 1910#endif
976
977#if EV_USE_PORT 1911#if EV_USE_PORT
978 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1912 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
979#endif 1913#endif
980#if EV_USE_KQUEUE 1914#if EV_USE_KQUEUE
981 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1915 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
988#endif 1922#endif
989#if EV_USE_SELECT 1923#if EV_USE_SELECT
990 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1924 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
991#endif 1925#endif
992 1926
1927 ev_prepare_init (&pending_w, pendingcb);
1928
1929#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
993 ev_init (&sigev, sigcb); 1930 ev_init (&pipe_w, pipecb);
994 ev_set_priority (&sigev, EV_MAXPRI); 1931 ev_set_priority (&pipe_w, EV_MAXPRI);
1932#endif
995 } 1933 }
996} 1934}
997 1935
998static void noinline 1936/* free up a loop structure */
1937void ecb_cold
999loop_destroy (EV_P) 1938ev_loop_destroy (EV_P)
1000{ 1939{
1001 int i; 1940 int i;
1941
1942#if EV_MULTIPLICITY
1943 /* mimic free (0) */
1944 if (!EV_A)
1945 return;
1946#endif
1947
1948#if EV_CLEANUP_ENABLE
1949 /* queue cleanup watchers (and execute them) */
1950 if (expect_false (cleanupcnt))
1951 {
1952 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1953 EV_INVOKE_PENDING;
1954 }
1955#endif
1956
1957#if EV_CHILD_ENABLE
1958 if (ev_is_active (&childev))
1959 {
1960 ev_ref (EV_A); /* child watcher */
1961 ev_signal_stop (EV_A_ &childev);
1962 }
1963#endif
1964
1965 if (ev_is_active (&pipe_w))
1966 {
1967 /*ev_ref (EV_A);*/
1968 /*ev_io_stop (EV_A_ &pipe_w);*/
1969
1970#if EV_USE_EVENTFD
1971 if (evfd >= 0)
1972 close (evfd);
1973#endif
1974
1975 if (evpipe [0] >= 0)
1976 {
1977 EV_WIN32_CLOSE_FD (evpipe [0]);
1978 EV_WIN32_CLOSE_FD (evpipe [1]);
1979 }
1980 }
1981
1982#if EV_USE_SIGNALFD
1983 if (ev_is_active (&sigfd_w))
1984 close (sigfd);
1985#endif
1002 1986
1003#if EV_USE_INOTIFY 1987#if EV_USE_INOTIFY
1004 if (fs_fd >= 0) 1988 if (fs_fd >= 0)
1005 close (fs_fd); 1989 close (fs_fd);
1006#endif 1990#endif
1007 1991
1008 if (backend_fd >= 0) 1992 if (backend_fd >= 0)
1009 close (backend_fd); 1993 close (backend_fd);
1010 1994
1995#if EV_USE_IOCP
1996 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1997#endif
1011#if EV_USE_PORT 1998#if EV_USE_PORT
1012 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1999 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1013#endif 2000#endif
1014#if EV_USE_KQUEUE 2001#if EV_USE_KQUEUE
1015 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2002 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1030#if EV_IDLE_ENABLE 2017#if EV_IDLE_ENABLE
1031 array_free (idle, [i]); 2018 array_free (idle, [i]);
1032#endif 2019#endif
1033 } 2020 }
1034 2021
2022 ev_free (anfds); anfds = 0; anfdmax = 0;
2023
1035 /* have to use the microsoft-never-gets-it-right macro */ 2024 /* have to use the microsoft-never-gets-it-right macro */
2025 array_free (rfeed, EMPTY);
1036 array_free (fdchange, EMPTY); 2026 array_free (fdchange, EMPTY);
1037 array_free (timer, EMPTY); 2027 array_free (timer, EMPTY);
1038#if EV_PERIODIC_ENABLE 2028#if EV_PERIODIC_ENABLE
1039 array_free (periodic, EMPTY); 2029 array_free (periodic, EMPTY);
1040#endif 2030#endif
2031#if EV_FORK_ENABLE
2032 array_free (fork, EMPTY);
2033#endif
2034#if EV_CLEANUP_ENABLE
2035 array_free (cleanup, EMPTY);
2036#endif
1041 array_free (prepare, EMPTY); 2037 array_free (prepare, EMPTY);
1042 array_free (check, EMPTY); 2038 array_free (check, EMPTY);
2039#if EV_ASYNC_ENABLE
2040 array_free (async, EMPTY);
2041#endif
1043 2042
1044 backend = 0; 2043 backend = 0;
1045}
1046 2044
2045#if EV_MULTIPLICITY
2046 if (ev_is_default_loop (EV_A))
2047#endif
2048 ev_default_loop_ptr = 0;
2049#if EV_MULTIPLICITY
2050 else
2051 ev_free (EV_A);
2052#endif
2053}
2054
2055#if EV_USE_INOTIFY
1047void inline_size infy_fork (EV_P); 2056inline_size void infy_fork (EV_P);
2057#endif
1048 2058
1049void inline_size 2059inline_size void
1050loop_fork (EV_P) 2060loop_fork (EV_P)
1051{ 2061{
1052#if EV_USE_PORT 2062#if EV_USE_PORT
1053 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2063 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1054#endif 2064#endif
… …
1060#endif 2070#endif
1061#if EV_USE_INOTIFY 2071#if EV_USE_INOTIFY
1062 infy_fork (EV_A); 2072 infy_fork (EV_A);
1063#endif 2073#endif
1064 2074
1065 if (ev_is_active (&sigev)) 2075 if (ev_is_active (&pipe_w))
1066 { 2076 {
1067 /* default loop */ 2077 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1068 2078
1069 ev_ref (EV_A); 2079 ev_ref (EV_A);
1070 ev_io_stop (EV_A_ &sigev); 2080 ev_io_stop (EV_A_ &pipe_w);
1071 close (sigpipe [0]);
1072 close (sigpipe [1]);
1073 2081
1074 while (pipe (sigpipe)) 2082#if EV_USE_EVENTFD
1075 syserr ("(libev) error creating pipe"); 2083 if (evfd >= 0)
2084 close (evfd);
2085#endif
1076 2086
2087 if (evpipe [0] >= 0)
2088 {
2089 EV_WIN32_CLOSE_FD (evpipe [0]);
2090 EV_WIN32_CLOSE_FD (evpipe [1]);
2091 }
2092
2093#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1077 siginit (EV_A); 2094 evpipe_init (EV_A);
2095 /* now iterate over everything, in case we missed something */
2096 pipecb (EV_A_ &pipe_w, EV_READ);
2097#endif
1078 } 2098 }
1079 2099
1080 postfork = 0; 2100 postfork = 0;
1081} 2101}
1082 2102
1083#if EV_MULTIPLICITY 2103#if EV_MULTIPLICITY
2104
1084struct ev_loop * 2105struct ev_loop * ecb_cold
1085ev_loop_new (unsigned int flags) 2106ev_loop_new (unsigned int flags)
1086{ 2107{
1087 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2108 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1088 2109
1089 memset (loop, 0, sizeof (struct ev_loop)); 2110 memset (EV_A, 0, sizeof (struct ev_loop));
1090
1091 loop_init (EV_A_ flags); 2111 loop_init (EV_A_ flags);
1092 2112
1093 if (ev_backend (EV_A)) 2113 if (ev_backend (EV_A))
1094 return loop; 2114 return EV_A;
1095 2115
2116 ev_free (EV_A);
1096 return 0; 2117 return 0;
1097} 2118}
1098 2119
1099void 2120#endif /* multiplicity */
1100ev_loop_destroy (EV_P)
1101{
1102 loop_destroy (EV_A);
1103 ev_free (loop);
1104}
1105 2121
1106void 2122#if EV_VERIFY
1107ev_loop_fork (EV_P) 2123static void noinline ecb_cold
2124verify_watcher (EV_P_ W w)
1108{ 2125{
1109 postfork = 1; 2126 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1110}
1111 2127
2128 if (w->pending)
2129 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2130}
2131
2132static void noinline ecb_cold
2133verify_heap (EV_P_ ANHE *heap, int N)
2134{
2135 int i;
2136
2137 for (i = HEAP0; i < N + HEAP0; ++i)
2138 {
2139 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2140 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2141 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2142
2143 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2144 }
2145}
2146
2147static void noinline ecb_cold
2148array_verify (EV_P_ W *ws, int cnt)
2149{
2150 while (cnt--)
2151 {
2152 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2153 verify_watcher (EV_A_ ws [cnt]);
2154 }
2155}
2156#endif
2157
2158#if EV_FEATURE_API
2159void ecb_cold
2160ev_verify (EV_P)
2161{
2162#if EV_VERIFY
2163 int i;
2164 WL w;
2165
2166 assert (activecnt >= -1);
2167
2168 assert (fdchangemax >= fdchangecnt);
2169 for (i = 0; i < fdchangecnt; ++i)
2170 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2171
2172 assert (anfdmax >= 0);
2173 for (i = 0; i < anfdmax; ++i)
2174 for (w = anfds [i].head; w; w = w->next)
2175 {
2176 verify_watcher (EV_A_ (W)w);
2177 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2178 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2179 }
2180
2181 assert (timermax >= timercnt);
2182 verify_heap (EV_A_ timers, timercnt);
2183
2184#if EV_PERIODIC_ENABLE
2185 assert (periodicmax >= periodiccnt);
2186 verify_heap (EV_A_ periodics, periodiccnt);
2187#endif
2188
2189 for (i = NUMPRI; i--; )
2190 {
2191 assert (pendingmax [i] >= pendingcnt [i]);
2192#if EV_IDLE_ENABLE
2193 assert (idleall >= 0);
2194 assert (idlemax [i] >= idlecnt [i]);
2195 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2196#endif
2197 }
2198
2199#if EV_FORK_ENABLE
2200 assert (forkmax >= forkcnt);
2201 array_verify (EV_A_ (W *)forks, forkcnt);
2202#endif
2203
2204#if EV_CLEANUP_ENABLE
2205 assert (cleanupmax >= cleanupcnt);
2206 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2207#endif
2208
2209#if EV_ASYNC_ENABLE
2210 assert (asyncmax >= asynccnt);
2211 array_verify (EV_A_ (W *)asyncs, asynccnt);
2212#endif
2213
2214#if EV_PREPARE_ENABLE
2215 assert (preparemax >= preparecnt);
2216 array_verify (EV_A_ (W *)prepares, preparecnt);
2217#endif
2218
2219#if EV_CHECK_ENABLE
2220 assert (checkmax >= checkcnt);
2221 array_verify (EV_A_ (W *)checks, checkcnt);
2222#endif
2223
2224# if 0
2225#if EV_CHILD_ENABLE
2226 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2227 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2228#endif
2229# endif
2230#endif
2231}
1112#endif 2232#endif
1113 2233
1114#if EV_MULTIPLICITY 2234#if EV_MULTIPLICITY
1115struct ev_loop * 2235struct ev_loop * ecb_cold
1116ev_default_loop_init (unsigned int flags)
1117#else 2236#else
1118int 2237int
2238#endif
1119ev_default_loop (unsigned int flags) 2239ev_default_loop (unsigned int flags)
1120#endif
1121{ 2240{
1122 if (sigpipe [0] == sigpipe [1])
1123 if (pipe (sigpipe))
1124 return 0;
1125
1126 if (!ev_default_loop_ptr) 2241 if (!ev_default_loop_ptr)
1127 { 2242 {
1128#if EV_MULTIPLICITY 2243#if EV_MULTIPLICITY
1129 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2244 EV_P = ev_default_loop_ptr = &default_loop_struct;
1130#else 2245#else
1131 ev_default_loop_ptr = 1; 2246 ev_default_loop_ptr = 1;
1132#endif 2247#endif
1133 2248
1134 loop_init (EV_A_ flags); 2249 loop_init (EV_A_ flags);
1135 2250
1136 if (ev_backend (EV_A)) 2251 if (ev_backend (EV_A))
1137 { 2252 {
1138 siginit (EV_A); 2253#if EV_CHILD_ENABLE
1139
1140#ifndef _WIN32
1141 ev_signal_init (&childev, childcb, SIGCHLD); 2254 ev_signal_init (&childev, childcb, SIGCHLD);
1142 ev_set_priority (&childev, EV_MAXPRI); 2255 ev_set_priority (&childev, EV_MAXPRI);
1143 ev_signal_start (EV_A_ &childev); 2256 ev_signal_start (EV_A_ &childev);
1144 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2257 ev_unref (EV_A); /* child watcher should not keep loop alive */
1145#endif 2258#endif
… …
1150 2263
1151 return ev_default_loop_ptr; 2264 return ev_default_loop_ptr;
1152} 2265}
1153 2266
1154void 2267void
1155ev_default_destroy (void) 2268ev_loop_fork (EV_P)
1156{ 2269{
1157#if EV_MULTIPLICITY 2270 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} 2271}
1185 2272
1186/*****************************************************************************/ 2273/*****************************************************************************/
1187 2274
1188void 2275void
1189ev_invoke (EV_P_ void *w, int revents) 2276ev_invoke (EV_P_ void *w, int revents)
1190{ 2277{
1191 EV_CB_INVOKE ((W)w, revents); 2278 EV_CB_INVOKE ((W)w, revents);
1192} 2279}
1193 2280
1194void inline_speed 2281unsigned int
1195call_pending (EV_P) 2282ev_pending_count (EV_P)
2283{
2284 int pri;
2285 unsigned int count = 0;
2286
2287 for (pri = NUMPRI; pri--; )
2288 count += pendingcnt [pri];
2289
2290 return count;
2291}
2292
2293void noinline
2294ev_invoke_pending (EV_P)
1196{ 2295{
1197 int pri; 2296 int pri;
1198 2297
1199 for (pri = NUMPRI; pri--; ) 2298 for (pri = NUMPRI; pri--; )
1200 while (pendingcnt [pri]) 2299 while (pendingcnt [pri])
1201 { 2300 {
1202 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2301 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1203 2302
1204 if (expect_true (p->w))
1205 {
1206 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1207
1208 p->w->pending = 0; 2303 p->w->pending = 0;
1209 EV_CB_INVOKE (p->w, p->events); 2304 EV_CB_INVOKE (p->w, p->events);
1210 } 2305 EV_FREQUENT_CHECK;
1211 } 2306 }
1212} 2307}
1213 2308
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 2309#if EV_IDLE_ENABLE
1295void inline_size 2310/* make idle watchers pending. this handles the "call-idle */
2311/* only when higher priorities are idle" logic */
2312inline_size void
1296idle_reify (EV_P) 2313idle_reify (EV_P)
1297{ 2314{
1298 if (expect_false (idleall)) 2315 if (expect_false (idleall))
1299 { 2316 {
1300 int pri; 2317 int pri;
… …
1312 } 2329 }
1313 } 2330 }
1314} 2331}
1315#endif 2332#endif
1316 2333
1317void inline_speed 2334/* make timers pending */
2335inline_size void
2336timers_reify (EV_P)
2337{
2338 EV_FREQUENT_CHECK;
2339
2340 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2341 {
2342 do
2343 {
2344 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2345
2346 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2347
2348 /* first reschedule or stop timer */
2349 if (w->repeat)
2350 {
2351 ev_at (w) += w->repeat;
2352 if (ev_at (w) < mn_now)
2353 ev_at (w) = mn_now;
2354
2355 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2356
2357 ANHE_at_cache (timers [HEAP0]);
2358 downheap (timers, timercnt, HEAP0);
2359 }
2360 else
2361 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2362
2363 EV_FREQUENT_CHECK;
2364 feed_reverse (EV_A_ (W)w);
2365 }
2366 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2367
2368 feed_reverse_done (EV_A_ EV_TIMER);
2369 }
2370}
2371
2372#if EV_PERIODIC_ENABLE
2373
2374static void noinline
2375periodic_recalc (EV_P_ ev_periodic *w)
2376{
2377 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2378 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2379
2380 /* the above almost always errs on the low side */
2381 while (at <= ev_rt_now)
2382 {
2383 ev_tstamp nat = at + w->interval;
2384
2385 /* when resolution fails us, we use ev_rt_now */
2386 if (expect_false (nat == at))
2387 {
2388 at = ev_rt_now;
2389 break;
2390 }
2391
2392 at = nat;
2393 }
2394
2395 ev_at (w) = at;
2396}
2397
2398/* make periodics pending */
2399inline_size void
2400periodics_reify (EV_P)
2401{
2402 EV_FREQUENT_CHECK;
2403
2404 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2405 {
2406 int feed_count = 0;
2407
2408 do
2409 {
2410 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2411
2412 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2413
2414 /* first reschedule or stop timer */
2415 if (w->reschedule_cb)
2416 {
2417 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2418
2419 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2420
2421 ANHE_at_cache (periodics [HEAP0]);
2422 downheap (periodics, periodiccnt, HEAP0);
2423 }
2424 else if (w->interval)
2425 {
2426 periodic_recalc (EV_A_ w);
2427 ANHE_at_cache (periodics [HEAP0]);
2428 downheap (periodics, periodiccnt, HEAP0);
2429 }
2430 else
2431 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2432
2433 EV_FREQUENT_CHECK;
2434 feed_reverse (EV_A_ (W)w);
2435 }
2436 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2437
2438 feed_reverse_done (EV_A_ EV_PERIODIC);
2439 }
2440}
2441
2442/* simply recalculate all periodics */
2443/* TODO: maybe ensure that at least one event happens when jumping forward? */
2444static void noinline ecb_cold
2445periodics_reschedule (EV_P)
2446{
2447 int i;
2448
2449 /* adjust periodics after time jump */
2450 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2451 {
2452 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2453
2454 if (w->reschedule_cb)
2455 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2456 else if (w->interval)
2457 periodic_recalc (EV_A_ w);
2458
2459 ANHE_at_cache (periodics [i]);
2460 }
2461
2462 reheap (periodics, periodiccnt);
2463}
2464#endif
2465
2466/* adjust all timers by a given offset */
2467static void noinline ecb_cold
2468timers_reschedule (EV_P_ ev_tstamp adjust)
2469{
2470 int i;
2471
2472 for (i = 0; i < timercnt; ++i)
2473 {
2474 ANHE *he = timers + i + HEAP0;
2475 ANHE_w (*he)->at += adjust;
2476 ANHE_at_cache (*he);
2477 }
2478}
2479
2480/* fetch new monotonic and realtime times from the kernel */
2481/* also detect if there was a timejump, and act accordingly */
2482inline_speed void
1318time_update (EV_P_ ev_tstamp max_block) 2483time_update (EV_P_ ev_tstamp max_block)
1319{ 2484{
1320 int i;
1321
1322#if EV_USE_MONOTONIC 2485#if EV_USE_MONOTONIC
1323 if (expect_true (have_monotonic)) 2486 if (expect_true (have_monotonic))
1324 { 2487 {
2488 int i;
1325 ev_tstamp odiff = rtmn_diff; 2489 ev_tstamp odiff = rtmn_diff;
1326 2490
1327 mn_now = get_clock (); 2491 mn_now = get_clock ();
1328 2492
1329 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2493 /* 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 2509 * doesn't hurt either as we only do this on time-jumps or
1346 * in the unlikely event of having been preempted here. 2510 * in the unlikely event of having been preempted here.
1347 */ 2511 */
1348 for (i = 4; --i; ) 2512 for (i = 4; --i; )
1349 { 2513 {
2514 ev_tstamp diff;
1350 rtmn_diff = ev_rt_now - mn_now; 2515 rtmn_diff = ev_rt_now - mn_now;
1351 2516
1352 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2517 diff = odiff - rtmn_diff;
2518
2519 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1353 return; /* all is well */ 2520 return; /* all is well */
1354 2521
1355 ev_rt_now = ev_time (); 2522 ev_rt_now = ev_time ();
1356 mn_now = get_clock (); 2523 mn_now = get_clock ();
1357 now_floor = mn_now; 2524 now_floor = mn_now;
1358 } 2525 }
1359 2526
2527 /* no timer adjustment, as the monotonic clock doesn't jump */
2528 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1360# if EV_PERIODIC_ENABLE 2529# if EV_PERIODIC_ENABLE
1361 periodics_reschedule (EV_A); 2530 periodics_reschedule (EV_A);
1362# endif 2531# endif
1363 /* no timer adjustment, as the monotonic clock doesn't jump */
1364 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1365 } 2532 }
1366 else 2533 else
1367#endif 2534#endif
1368 { 2535 {
1369 ev_rt_now = ev_time (); 2536 ev_rt_now = ev_time ();
1370 2537
1371 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2538 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1372 { 2539 {
2540 /* adjust timers. this is easy, as the offset is the same for all of them */
2541 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1373#if EV_PERIODIC_ENABLE 2542#if EV_PERIODIC_ENABLE
1374 periodics_reschedule (EV_A); 2543 periodics_reschedule (EV_A);
1375#endif 2544#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 } 2545 }
1380 2546
1381 mn_now = ev_rt_now; 2547 mn_now = ev_rt_now;
1382 } 2548 }
1383} 2549}
1384 2550
1385void 2551void
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) 2552ev_run (EV_P_ int flags)
1401{ 2553{
1402 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2554#if EV_FEATURE_API
1403 ? EVUNLOOP_ONE 2555 ++loop_depth;
1404 : EVUNLOOP_CANCEL; 2556#endif
1405 2557
2558 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2559
2560 loop_done = EVBREAK_CANCEL;
2561
1406 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2562 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1407 2563
1408 do 2564 do
1409 { 2565 {
2566#if EV_VERIFY >= 2
2567 ev_verify (EV_A);
2568#endif
2569
1410#ifndef _WIN32 2570#ifndef _WIN32
1411 if (expect_false (curpid)) /* penalise the forking check even more */ 2571 if (expect_false (curpid)) /* penalise the forking check even more */
1412 if (expect_false (getpid () != curpid)) 2572 if (expect_false (getpid () != curpid))
1413 { 2573 {
1414 curpid = getpid (); 2574 curpid = getpid ();
… …
1420 /* we might have forked, so queue fork handlers */ 2580 /* we might have forked, so queue fork handlers */
1421 if (expect_false (postfork)) 2581 if (expect_false (postfork))
1422 if (forkcnt) 2582 if (forkcnt)
1423 { 2583 {
1424 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2584 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1425 call_pending (EV_A); 2585 EV_INVOKE_PENDING;
1426 } 2586 }
1427#endif 2587#endif
1428 2588
2589#if EV_PREPARE_ENABLE
1429 /* queue prepare watchers (and execute them) */ 2590 /* queue prepare watchers (and execute them) */
1430 if (expect_false (preparecnt)) 2591 if (expect_false (preparecnt))
1431 { 2592 {
1432 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2593 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1433 call_pending (EV_A); 2594 EV_INVOKE_PENDING;
1434 } 2595 }
2596#endif
1435 2597
1436 if (expect_false (!activecnt)) 2598 if (expect_false (loop_done))
1437 break; 2599 break;
1438 2600
1439 /* we might have forked, so reify kernel state if necessary */ 2601 /* we might have forked, so reify kernel state if necessary */
1440 if (expect_false (postfork)) 2602 if (expect_false (postfork))
1441 loop_fork (EV_A); 2603 loop_fork (EV_A);
… …
1443 /* update fd-related kernel structures */ 2605 /* update fd-related kernel structures */
1444 fd_reify (EV_A); 2606 fd_reify (EV_A);
1445 2607
1446 /* calculate blocking time */ 2608 /* calculate blocking time */
1447 { 2609 {
1448 ev_tstamp block; 2610 ev_tstamp waittime = 0.;
2611 ev_tstamp sleeptime = 0.;
1449 2612
1450 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2613 /* remember old timestamp for io_blocktime calculation */
1451 block = 0.; /* do not block at all */ 2614 ev_tstamp prev_mn_now = mn_now;
1452 else 2615
2616 /* update time to cancel out callback processing overhead */
2617 time_update (EV_A_ 1e100);
2618
2619 /* from now on, we want a pipe-wake-up */
2620 pipe_write_wanted = 1;
2621
2622 ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
2623
2624 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1453 { 2625 {
1454 /* update time to cancel out callback processing overhead */
1455 time_update (EV_A_ 1e100);
1456
1457 block = MAX_BLOCKTIME; 2626 waittime = MAX_BLOCKTIME;
1458 2627
1459 if (timercnt) 2628 if (timercnt)
1460 { 2629 {
1461 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2630 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1462 if (block > to) block = to; 2631 if (waittime > to) waittime = to;
1463 } 2632 }
1464 2633
1465#if EV_PERIODIC_ENABLE 2634#if EV_PERIODIC_ENABLE
1466 if (periodiccnt) 2635 if (periodiccnt)
1467 { 2636 {
1468 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2637 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1469 if (block > to) block = to; 2638 if (waittime > to) waittime = to;
1470 } 2639 }
1471#endif 2640#endif
1472 2641
2642 /* don't let timeouts decrease the waittime below timeout_blocktime */
2643 if (expect_false (waittime < timeout_blocktime))
2644 waittime = timeout_blocktime;
2645
2646 /* at this point, we NEED to wait, so we have to ensure */
2647 /* to pass a minimum nonzero value to the backend */
2648 if (expect_false (waittime < backend_mintime))
2649 waittime = backend_mintime;
2650
2651 /* extra check because io_blocktime is commonly 0 */
1473 if (expect_false (block < 0.)) block = 0.; 2652 if (expect_false (io_blocktime))
2653 {
2654 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2655
2656 if (sleeptime > waittime - backend_mintime)
2657 sleeptime = waittime - backend_mintime;
2658
2659 if (expect_true (sleeptime > 0.))
2660 {
2661 ev_sleep (sleeptime);
2662 waittime -= sleeptime;
2663 }
2664 }
1474 } 2665 }
1475 2666
2667#if EV_FEATURE_API
1476 ++loop_count; 2668 ++loop_count;
2669#endif
2670 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1477 backend_poll (EV_A_ block); 2671 backend_poll (EV_A_ waittime);
2672 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2673
2674 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2675
2676 if (pipe_write_skipped)
2677 {
2678 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2679 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2680 }
2681
1478 2682
1479 /* update ev_rt_now, do magic */ 2683 /* update ev_rt_now, do magic */
1480 time_update (EV_A_ block); 2684 time_update (EV_A_ waittime + sleeptime);
1481 } 2685 }
1482 2686
1483 /* queue pending timers and reschedule them */ 2687 /* queue pending timers and reschedule them */
1484 timers_reify (EV_A); /* relative timers called last */ 2688 timers_reify (EV_A); /* relative timers called last */
1485#if EV_PERIODIC_ENABLE 2689#if EV_PERIODIC_ENABLE
… …
1489#if EV_IDLE_ENABLE 2693#if EV_IDLE_ENABLE
1490 /* queue idle watchers unless other events are pending */ 2694 /* queue idle watchers unless other events are pending */
1491 idle_reify (EV_A); 2695 idle_reify (EV_A);
1492#endif 2696#endif
1493 2697
2698#if EV_CHECK_ENABLE
1494 /* queue check watchers, to be executed first */ 2699 /* queue check watchers, to be executed first */
1495 if (expect_false (checkcnt)) 2700 if (expect_false (checkcnt))
1496 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2701 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2702#endif
1497 2703
1498 call_pending (EV_A); 2704 EV_INVOKE_PENDING;
1499
1500 } 2705 }
1501 while (expect_true (activecnt && !loop_done)); 2706 while (expect_true (
2707 activecnt
2708 && !loop_done
2709 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2710 ));
1502 2711
1503 if (loop_done == EVUNLOOP_ONE) 2712 if (loop_done == EVBREAK_ONE)
1504 loop_done = EVUNLOOP_CANCEL; 2713 loop_done = EVBREAK_CANCEL;
2714
2715#if EV_FEATURE_API
2716 --loop_depth;
2717#endif
1505} 2718}
1506 2719
1507void 2720void
1508ev_unloop (EV_P_ int how) 2721ev_break (EV_P_ int how)
1509{ 2722{
1510 loop_done = how; 2723 loop_done = how;
1511} 2724}
1512 2725
2726void
2727ev_ref (EV_P)
2728{
2729 ++activecnt;
2730}
2731
2732void
2733ev_unref (EV_P)
2734{
2735 --activecnt;
2736}
2737
2738void
2739ev_now_update (EV_P)
2740{
2741 time_update (EV_A_ 1e100);
2742}
2743
2744void
2745ev_suspend (EV_P)
2746{
2747 ev_now_update (EV_A);
2748}
2749
2750void
2751ev_resume (EV_P)
2752{
2753 ev_tstamp mn_prev = mn_now;
2754
2755 ev_now_update (EV_A);
2756 timers_reschedule (EV_A_ mn_now - mn_prev);
2757#if EV_PERIODIC_ENABLE
2758 /* TODO: really do this? */
2759 periodics_reschedule (EV_A);
2760#endif
2761}
2762
1513/*****************************************************************************/ 2763/*****************************************************************************/
2764/* singly-linked list management, used when the expected list length is short */
1514 2765
1515void inline_size 2766inline_size void
1516wlist_add (WL *head, WL elem) 2767wlist_add (WL *head, WL elem)
1517{ 2768{
1518 elem->next = *head; 2769 elem->next = *head;
1519 *head = elem; 2770 *head = elem;
1520} 2771}
1521 2772
1522void inline_size 2773inline_size void
1523wlist_del (WL *head, WL elem) 2774wlist_del (WL *head, WL elem)
1524{ 2775{
1525 while (*head) 2776 while (*head)
1526 { 2777 {
1527 if (*head == elem) 2778 if (expect_true (*head == elem))
1528 { 2779 {
1529 *head = elem->next; 2780 *head = elem->next;
1530 return; 2781 break;
1531 } 2782 }
1532 2783
1533 head = &(*head)->next; 2784 head = &(*head)->next;
1534 } 2785 }
1535} 2786}
1536 2787
1537void inline_speed 2788/* internal, faster, version of ev_clear_pending */
2789inline_speed void
1538clear_pending (EV_P_ W w) 2790clear_pending (EV_P_ W w)
1539{ 2791{
1540 if (w->pending) 2792 if (w->pending)
1541 { 2793 {
1542 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2794 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1543 w->pending = 0; 2795 w->pending = 0;
1544 } 2796 }
1545} 2797}
1546 2798
1547int 2799int
… …
1551 int pending = w_->pending; 2803 int pending = w_->pending;
1552 2804
1553 if (expect_true (pending)) 2805 if (expect_true (pending))
1554 { 2806 {
1555 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2807 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2808 p->w = (W)&pending_w;
1556 w_->pending = 0; 2809 w_->pending = 0;
1557 p->w = 0;
1558 return p->events; 2810 return p->events;
1559 } 2811 }
1560 else 2812 else
1561 return 0; 2813 return 0;
1562} 2814}
1563 2815
1564void inline_size 2816inline_size void
1565pri_adjust (EV_P_ W w) 2817pri_adjust (EV_P_ W w)
1566{ 2818{
1567 int pri = w->priority; 2819 int pri = ev_priority (w);
1568 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2820 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1569 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2821 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1570 w->priority = pri; 2822 ev_set_priority (w, pri);
1571} 2823}
1572 2824
1573void inline_speed 2825inline_speed void
1574ev_start (EV_P_ W w, int active) 2826ev_start (EV_P_ W w, int active)
1575{ 2827{
1576 pri_adjust (EV_A_ w); 2828 pri_adjust (EV_A_ w);
1577 w->active = active; 2829 w->active = active;
1578 ev_ref (EV_A); 2830 ev_ref (EV_A);
1579} 2831}
1580 2832
1581void inline_size 2833inline_size void
1582ev_stop (EV_P_ W w) 2834ev_stop (EV_P_ W w)
1583{ 2835{
1584 ev_unref (EV_A); 2836 ev_unref (EV_A);
1585 w->active = 0; 2837 w->active = 0;
1586} 2838}
… …
1593 int fd = w->fd; 2845 int fd = w->fd;
1594 2846
1595 if (expect_false (ev_is_active (w))) 2847 if (expect_false (ev_is_active (w)))
1596 return; 2848 return;
1597 2849
1598 assert (("ev_io_start called with negative fd", fd >= 0)); 2850 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2851 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2852
2853 EV_FREQUENT_CHECK;
1599 2854
1600 ev_start (EV_A_ (W)w, 1); 2855 ev_start (EV_A_ (W)w, 1);
1601 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2856 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1602 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2857 wlist_add (&anfds[fd].head, (WL)w);
1603 2858
1604 fd_change (EV_A_ fd); 2859 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2860 w->events &= ~EV__IOFDSET;
2861
2862 EV_FREQUENT_CHECK;
1605} 2863}
1606 2864
1607void noinline 2865void noinline
1608ev_io_stop (EV_P_ ev_io *w) 2866ev_io_stop (EV_P_ ev_io *w)
1609{ 2867{
1610 clear_pending (EV_A_ (W)w); 2868 clear_pending (EV_A_ (W)w);
1611 if (expect_false (!ev_is_active (w))) 2869 if (expect_false (!ev_is_active (w)))
1612 return; 2870 return;
1613 2871
1614 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2872 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1615 2873
2874 EV_FREQUENT_CHECK;
2875
1616 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2876 wlist_del (&anfds[w->fd].head, (WL)w);
1617 ev_stop (EV_A_ (W)w); 2877 ev_stop (EV_A_ (W)w);
1618 2878
1619 fd_change (EV_A_ w->fd); 2879 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2880
2881 EV_FREQUENT_CHECK;
1620} 2882}
1621 2883
1622void noinline 2884void noinline
1623ev_timer_start (EV_P_ ev_timer *w) 2885ev_timer_start (EV_P_ ev_timer *w)
1624{ 2886{
1625 if (expect_false (ev_is_active (w))) 2887 if (expect_false (ev_is_active (w)))
1626 return; 2888 return;
1627 2889
1628 ((WT)w)->at += mn_now; 2890 ev_at (w) += mn_now;
1629 2891
1630 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2892 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1631 2893
2894 EV_FREQUENT_CHECK;
2895
2896 ++timercnt;
1632 ev_start (EV_A_ (W)w, ++timercnt); 2897 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1633 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 2898 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1634 timers [timercnt - 1] = (WT)w; 2899 ANHE_w (timers [ev_active (w)]) = (WT)w;
1635 upheap (timers, timercnt - 1); 2900 ANHE_at_cache (timers [ev_active (w)]);
2901 upheap (timers, ev_active (w));
1636 2902
2903 EV_FREQUENT_CHECK;
2904
1637 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2905 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1638} 2906}
1639 2907
1640void noinline 2908void noinline
1641ev_timer_stop (EV_P_ ev_timer *w) 2909ev_timer_stop (EV_P_ ev_timer *w)
1642{ 2910{
1643 clear_pending (EV_A_ (W)w); 2911 clear_pending (EV_A_ (W)w);
1644 if (expect_false (!ev_is_active (w))) 2912 if (expect_false (!ev_is_active (w)))
1645 return; 2913 return;
1646 2914
1647 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 2915 EV_FREQUENT_CHECK;
1648 2916
1649 { 2917 {
1650 int active = ((W)w)->active; 2918 int active = ev_active (w);
1651 2919
2920 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2921
2922 --timercnt;
2923
1652 if (expect_true (--active < --timercnt)) 2924 if (expect_true (active < timercnt + HEAP0))
1653 { 2925 {
1654 timers [active] = timers [timercnt]; 2926 timers [active] = timers [timercnt + HEAP0];
1655 adjustheap (timers, timercnt, active); 2927 adjustheap (timers, timercnt, active);
1656 } 2928 }
1657 } 2929 }
1658 2930
1659 ((WT)w)->at -= mn_now; 2931 ev_at (w) -= mn_now;
1660 2932
1661 ev_stop (EV_A_ (W)w); 2933 ev_stop (EV_A_ (W)w);
2934
2935 EV_FREQUENT_CHECK;
1662} 2936}
1663 2937
1664void noinline 2938void noinline
1665ev_timer_again (EV_P_ ev_timer *w) 2939ev_timer_again (EV_P_ ev_timer *w)
1666{ 2940{
2941 EV_FREQUENT_CHECK;
2942
1667 if (ev_is_active (w)) 2943 if (ev_is_active (w))
1668 { 2944 {
1669 if (w->repeat) 2945 if (w->repeat)
1670 { 2946 {
1671 ((WT)w)->at = mn_now + w->repeat; 2947 ev_at (w) = mn_now + w->repeat;
2948 ANHE_at_cache (timers [ev_active (w)]);
1672 adjustheap (timers, timercnt, ((W)w)->active - 1); 2949 adjustheap (timers, timercnt, ev_active (w));
1673 } 2950 }
1674 else 2951 else
1675 ev_timer_stop (EV_A_ w); 2952 ev_timer_stop (EV_A_ w);
1676 } 2953 }
1677 else if (w->repeat) 2954 else if (w->repeat)
1678 { 2955 {
1679 w->at = w->repeat; 2956 ev_at (w) = w->repeat;
1680 ev_timer_start (EV_A_ w); 2957 ev_timer_start (EV_A_ w);
1681 } 2958 }
2959
2960 EV_FREQUENT_CHECK;
2961}
2962
2963ev_tstamp
2964ev_timer_remaining (EV_P_ ev_timer *w)
2965{
2966 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1682} 2967}
1683 2968
1684#if EV_PERIODIC_ENABLE 2969#if EV_PERIODIC_ENABLE
1685void noinline 2970void noinline
1686ev_periodic_start (EV_P_ ev_periodic *w) 2971ev_periodic_start (EV_P_ ev_periodic *w)
1687{ 2972{
1688 if (expect_false (ev_is_active (w))) 2973 if (expect_false (ev_is_active (w)))
1689 return; 2974 return;
1690 2975
1691 if (w->reschedule_cb) 2976 if (w->reschedule_cb)
1692 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2977 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1693 else if (w->interval) 2978 else if (w->interval)
1694 { 2979 {
1695 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2980 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 */ 2981 periodic_recalc (EV_A_ w);
1697 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1698 } 2982 }
1699 else 2983 else
1700 ((WT)w)->at = w->offset; 2984 ev_at (w) = w->offset;
1701 2985
2986 EV_FREQUENT_CHECK;
2987
2988 ++periodiccnt;
1702 ev_start (EV_A_ (W)w, ++periodiccnt); 2989 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1703 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 2990 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1704 periodics [periodiccnt - 1] = (WT)w; 2991 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1705 upheap (periodics, periodiccnt - 1); 2992 ANHE_at_cache (periodics [ev_active (w)]);
2993 upheap (periodics, ev_active (w));
1706 2994
2995 EV_FREQUENT_CHECK;
2996
1707 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2997 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1708} 2998}
1709 2999
1710void noinline 3000void noinline
1711ev_periodic_stop (EV_P_ ev_periodic *w) 3001ev_periodic_stop (EV_P_ ev_periodic *w)
1712{ 3002{
1713 clear_pending (EV_A_ (W)w); 3003 clear_pending (EV_A_ (W)w);
1714 if (expect_false (!ev_is_active (w))) 3004 if (expect_false (!ev_is_active (w)))
1715 return; 3005 return;
1716 3006
1717 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3007 EV_FREQUENT_CHECK;
1718 3008
1719 { 3009 {
1720 int active = ((W)w)->active; 3010 int active = ev_active (w);
1721 3011
3012 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3013
3014 --periodiccnt;
3015
1722 if (expect_true (--active < --periodiccnt)) 3016 if (expect_true (active < periodiccnt + HEAP0))
1723 { 3017 {
1724 periodics [active] = periodics [periodiccnt]; 3018 periodics [active] = periodics [periodiccnt + HEAP0];
1725 adjustheap (periodics, periodiccnt, active); 3019 adjustheap (periodics, periodiccnt, active);
1726 } 3020 }
1727 } 3021 }
1728 3022
1729 ev_stop (EV_A_ (W)w); 3023 ev_stop (EV_A_ (W)w);
3024
3025 EV_FREQUENT_CHECK;
1730} 3026}
1731 3027
1732void noinline 3028void noinline
1733ev_periodic_again (EV_P_ ev_periodic *w) 3029ev_periodic_again (EV_P_ ev_periodic *w)
1734{ 3030{
… …
1740 3036
1741#ifndef SA_RESTART 3037#ifndef SA_RESTART
1742# define SA_RESTART 0 3038# define SA_RESTART 0
1743#endif 3039#endif
1744 3040
3041#if EV_SIGNAL_ENABLE
3042
1745void noinline 3043void noinline
1746ev_signal_start (EV_P_ ev_signal *w) 3044ev_signal_start (EV_P_ ev_signal *w)
1747{ 3045{
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))) 3046 if (expect_false (ev_is_active (w)))
1752 return; 3047 return;
1753 3048
1754 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3049 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1755 3050
3051#if EV_MULTIPLICITY
3052 assert (("libev: a signal must not be attached to two different loops",
3053 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3054
3055 signals [w->signum - 1].loop = EV_A;
3056#endif
3057
3058 EV_FREQUENT_CHECK;
3059
3060#if EV_USE_SIGNALFD
3061 if (sigfd == -2)
1756 { 3062 {
1757#ifndef _WIN32 3063 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1758 sigset_t full, prev; 3064 if (sigfd < 0 && errno == EINVAL)
1759 sigfillset (&full); 3065 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1760 sigprocmask (SIG_SETMASK, &full, &prev);
1761#endif
1762 3066
1763 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3067 if (sigfd >= 0)
3068 {
3069 fd_intern (sigfd); /* doing it twice will not hurt */
1764 3070
1765#ifndef _WIN32 3071 sigemptyset (&sigfd_set);
1766 sigprocmask (SIG_SETMASK, &prev, 0); 3072
1767#endif 3073 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3074 ev_set_priority (&sigfd_w, EV_MAXPRI);
3075 ev_io_start (EV_A_ &sigfd_w);
3076 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3077 }
1768 } 3078 }
3079
3080 if (sigfd >= 0)
3081 {
3082 /* TODO: check .head */
3083 sigaddset (&sigfd_set, w->signum);
3084 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3085
3086 signalfd (sigfd, &sigfd_set, 0);
3087 }
3088#endif
1769 3089
1770 ev_start (EV_A_ (W)w, 1); 3090 ev_start (EV_A_ (W)w, 1);
1771 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3091 wlist_add (&signals [w->signum - 1].head, (WL)w);
1772 3092
1773 if (!((WL)w)->next) 3093 if (!((WL)w)->next)
3094# if EV_USE_SIGNALFD
3095 if (sigfd < 0) /*TODO*/
3096# endif
1774 { 3097 {
1775#if _WIN32 3098# ifdef _WIN32
3099 evpipe_init (EV_A);
3100
1776 signal (w->signum, sighandler); 3101 signal (w->signum, ev_sighandler);
1777#else 3102# else
1778 struct sigaction sa; 3103 struct sigaction sa;
3104
3105 evpipe_init (EV_A);
3106
1779 sa.sa_handler = sighandler; 3107 sa.sa_handler = ev_sighandler;
1780 sigfillset (&sa.sa_mask); 3108 sigfillset (&sa.sa_mask);
1781 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3109 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1782 sigaction (w->signum, &sa, 0); 3110 sigaction (w->signum, &sa, 0);
3111
3112 if (origflags & EVFLAG_NOSIGMASK)
3113 {
3114 sigemptyset (&sa.sa_mask);
3115 sigaddset (&sa.sa_mask, w->signum);
3116 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3117 }
1783#endif 3118#endif
1784 } 3119 }
3120
3121 EV_FREQUENT_CHECK;
1785} 3122}
1786 3123
1787void noinline 3124void noinline
1788ev_signal_stop (EV_P_ ev_signal *w) 3125ev_signal_stop (EV_P_ ev_signal *w)
1789{ 3126{
1790 clear_pending (EV_A_ (W)w); 3127 clear_pending (EV_A_ (W)w);
1791 if (expect_false (!ev_is_active (w))) 3128 if (expect_false (!ev_is_active (w)))
1792 return; 3129 return;
1793 3130
3131 EV_FREQUENT_CHECK;
3132
1794 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3133 wlist_del (&signals [w->signum - 1].head, (WL)w);
1795 ev_stop (EV_A_ (W)w); 3134 ev_stop (EV_A_ (W)w);
1796 3135
1797 if (!signals [w->signum - 1].head) 3136 if (!signals [w->signum - 1].head)
3137 {
3138#if EV_MULTIPLICITY
3139 signals [w->signum - 1].loop = 0; /* unattach from signal */
3140#endif
3141#if EV_USE_SIGNALFD
3142 if (sigfd >= 0)
3143 {
3144 sigset_t ss;
3145
3146 sigemptyset (&ss);
3147 sigaddset (&ss, w->signum);
3148 sigdelset (&sigfd_set, w->signum);
3149
3150 signalfd (sigfd, &sigfd_set, 0);
3151 sigprocmask (SIG_UNBLOCK, &ss, 0);
3152 }
3153 else
3154#endif
1798 signal (w->signum, SIG_DFL); 3155 signal (w->signum, SIG_DFL);
3156 }
3157
3158 EV_FREQUENT_CHECK;
1799} 3159}
3160
3161#endif
3162
3163#if EV_CHILD_ENABLE
1800 3164
1801void 3165void
1802ev_child_start (EV_P_ ev_child *w) 3166ev_child_start (EV_P_ ev_child *w)
1803{ 3167{
1804#if EV_MULTIPLICITY 3168#if EV_MULTIPLICITY
1805 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3169 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1806#endif 3170#endif
1807 if (expect_false (ev_is_active (w))) 3171 if (expect_false (ev_is_active (w)))
1808 return; 3172 return;
1809 3173
3174 EV_FREQUENT_CHECK;
3175
1810 ev_start (EV_A_ (W)w, 1); 3176 ev_start (EV_A_ (W)w, 1);
1811 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3177 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3178
3179 EV_FREQUENT_CHECK;
1812} 3180}
1813 3181
1814void 3182void
1815ev_child_stop (EV_P_ ev_child *w) 3183ev_child_stop (EV_P_ ev_child *w)
1816{ 3184{
1817 clear_pending (EV_A_ (W)w); 3185 clear_pending (EV_A_ (W)w);
1818 if (expect_false (!ev_is_active (w))) 3186 if (expect_false (!ev_is_active (w)))
1819 return; 3187 return;
1820 3188
3189 EV_FREQUENT_CHECK;
3190
1821 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3191 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1822 ev_stop (EV_A_ (W)w); 3192 ev_stop (EV_A_ (W)w);
3193
3194 EV_FREQUENT_CHECK;
1823} 3195}
3196
3197#endif
1824 3198
1825#if EV_STAT_ENABLE 3199#if EV_STAT_ENABLE
1826 3200
1827# ifdef _WIN32 3201# ifdef _WIN32
1828# undef lstat 3202# undef lstat
1829# define lstat(a,b) _stati64 (a,b) 3203# define lstat(a,b) _stati64 (a,b)
1830# endif 3204# endif
1831 3205
1832#define DEF_STAT_INTERVAL 5.0074891 3206#define DEF_STAT_INTERVAL 5.0074891
3207#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1833#define MIN_STAT_INTERVAL 0.1074891 3208#define MIN_STAT_INTERVAL 0.1074891
1834 3209
1835static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3210static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1836 3211
1837#if EV_USE_INOTIFY 3212#if EV_USE_INOTIFY
1838# define EV_INOTIFY_BUFSIZE 8192 3213
3214/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3215# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1839 3216
1840static void noinline 3217static void noinline
1841infy_add (EV_P_ ev_stat *w) 3218infy_add (EV_P_ ev_stat *w)
1842{ 3219{
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); 3220 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 3221
1845 if (w->wd < 0) 3222 if (w->wd >= 0)
3223 {
3224 struct statfs sfs;
3225
3226 /* now local changes will be tracked by inotify, but remote changes won't */
3227 /* unless the filesystem is known to be local, we therefore still poll */
3228 /* also do poll on <2.6.25, but with normal frequency */
3229
3230 if (!fs_2625)
3231 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3232 else if (!statfs (w->path, &sfs)
3233 && (sfs.f_type == 0x1373 /* devfs */
3234 || sfs.f_type == 0xEF53 /* ext2/3 */
3235 || sfs.f_type == 0x3153464a /* jfs */
3236 || sfs.f_type == 0x52654973 /* reiser3 */
3237 || sfs.f_type == 0x01021994 /* tempfs */
3238 || sfs.f_type == 0x58465342 /* xfs */))
3239 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3240 else
3241 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1846 { 3242 }
1847 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3243 else
3244 {
3245 /* can't use inotify, continue to stat */
3246 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1848 3247
1849 /* monitor some parent directory for speedup hints */ 3248 /* if path is not there, monitor some parent directory for speedup hints */
3249 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3250 /* but an efficiency issue only */
1850 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3251 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1851 { 3252 {
1852 char path [4096]; 3253 char path [4096];
1853 strcpy (path, w->path); 3254 strcpy (path, w->path);
1854 3255
… …
1857 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3258 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1858 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3259 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1859 3260
1860 char *pend = strrchr (path, '/'); 3261 char *pend = strrchr (path, '/');
1861 3262
1862 if (!pend) 3263 if (!pend || pend == path)
1863 break; /* whoops, no '/', complain to your admin */ 3264 break;
1864 3265
1865 *pend = 0; 3266 *pend = 0;
1866 w->wd = inotify_add_watch (fs_fd, path, mask); 3267 w->wd = inotify_add_watch (fs_fd, path, mask);
1867 } 3268 }
1868 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3269 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1869 } 3270 }
1870 } 3271 }
1871 else
1872 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1873 3272
1874 if (w->wd >= 0) 3273 if (w->wd >= 0)
1875 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3274 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3275
3276 /* now re-arm timer, if required */
3277 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3278 ev_timer_again (EV_A_ &w->timer);
3279 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1876} 3280}
1877 3281
1878static void noinline 3282static void noinline
1879infy_del (EV_P_ ev_stat *w) 3283infy_del (EV_P_ ev_stat *w)
1880{ 3284{
… …
1883 3287
1884 if (wd < 0) 3288 if (wd < 0)
1885 return; 3289 return;
1886 3290
1887 w->wd = -2; 3291 w->wd = -2;
1888 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3292 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1889 wlist_del (&fs_hash [slot].head, (WL)w); 3293 wlist_del (&fs_hash [slot].head, (WL)w);
1890 3294
1891 /* remove this watcher, if others are watching it, they will rearm */ 3295 /* remove this watcher, if others are watching it, they will rearm */
1892 inotify_rm_watch (fs_fd, wd); 3296 inotify_rm_watch (fs_fd, wd);
1893} 3297}
1894 3298
1895static void noinline 3299static void noinline
1896infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3300infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1897{ 3301{
1898 if (slot < 0) 3302 if (slot < 0)
1899 /* overflow, need to check for all hahs slots */ 3303 /* overflow, need to check for all hash slots */
1900 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3304 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1901 infy_wd (EV_A_ slot, wd, ev); 3305 infy_wd (EV_A_ slot, wd, ev);
1902 else 3306 else
1903 { 3307 {
1904 WL w_; 3308 WL w_;
1905 3309
1906 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3310 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1907 { 3311 {
1908 ev_stat *w = (ev_stat *)w_; 3312 ev_stat *w = (ev_stat *)w_;
1909 w_ = w_->next; /* lets us remove this watcher and all before it */ 3313 w_ = w_->next; /* lets us remove this watcher and all before it */
1910 3314
1911 if (w->wd == wd || wd == -1) 3315 if (w->wd == wd || wd == -1)
1912 { 3316 {
1913 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3317 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1914 { 3318 {
3319 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1915 w->wd = -1; 3320 w->wd = -1;
1916 infy_add (EV_A_ w); /* re-add, no matter what */ 3321 infy_add (EV_A_ w); /* re-add, no matter what */
1917 } 3322 }
1918 3323
1919 stat_timer_cb (EV_A_ &w->timer, 0); 3324 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1924 3329
1925static void 3330static void
1926infy_cb (EV_P_ ev_io *w, int revents) 3331infy_cb (EV_P_ ev_io *w, int revents)
1927{ 3332{
1928 char buf [EV_INOTIFY_BUFSIZE]; 3333 char buf [EV_INOTIFY_BUFSIZE];
1929 struct inotify_event *ev = (struct inotify_event *)buf;
1930 int ofs; 3334 int ofs;
1931 int len = read (fs_fd, buf, sizeof (buf)); 3335 int len = read (fs_fd, buf, sizeof (buf));
1932 3336
1933 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3337 for (ofs = 0; ofs < len; )
3338 {
3339 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1934 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3340 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3341 ofs += sizeof (struct inotify_event) + ev->len;
3342 }
1935} 3343}
1936 3344
1937void inline_size 3345inline_size void ecb_cold
3346ev_check_2625 (EV_P)
3347{
3348 /* kernels < 2.6.25 are borked
3349 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3350 */
3351 if (ev_linux_version () < 0x020619)
3352 return;
3353
3354 fs_2625 = 1;
3355}
3356
3357inline_size int
3358infy_newfd (void)
3359{
3360#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3361 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3362 if (fd >= 0)
3363 return fd;
3364#endif
3365 return inotify_init ();
3366}
3367
3368inline_size void
1938infy_init (EV_P) 3369infy_init (EV_P)
1939{ 3370{
1940 if (fs_fd != -2) 3371 if (fs_fd != -2)
1941 return; 3372 return;
1942 3373
3374 fs_fd = -1;
3375
3376 ev_check_2625 (EV_A);
3377
1943 fs_fd = inotify_init (); 3378 fs_fd = infy_newfd ();
1944 3379
1945 if (fs_fd >= 0) 3380 if (fs_fd >= 0)
1946 { 3381 {
3382 fd_intern (fs_fd);
1947 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3383 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1948 ev_set_priority (&fs_w, EV_MAXPRI); 3384 ev_set_priority (&fs_w, EV_MAXPRI);
1949 ev_io_start (EV_A_ &fs_w); 3385 ev_io_start (EV_A_ &fs_w);
3386 ev_unref (EV_A);
1950 } 3387 }
1951} 3388}
1952 3389
1953void inline_size 3390inline_size void
1954infy_fork (EV_P) 3391infy_fork (EV_P)
1955{ 3392{
1956 int slot; 3393 int slot;
1957 3394
1958 if (fs_fd < 0) 3395 if (fs_fd < 0)
1959 return; 3396 return;
1960 3397
3398 ev_ref (EV_A);
3399 ev_io_stop (EV_A_ &fs_w);
1961 close (fs_fd); 3400 close (fs_fd);
1962 fs_fd = inotify_init (); 3401 fs_fd = infy_newfd ();
1963 3402
3403 if (fs_fd >= 0)
3404 {
3405 fd_intern (fs_fd);
3406 ev_io_set (&fs_w, fs_fd, EV_READ);
3407 ev_io_start (EV_A_ &fs_w);
3408 ev_unref (EV_A);
3409 }
3410
1964 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3411 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1965 { 3412 {
1966 WL w_ = fs_hash [slot].head; 3413 WL w_ = fs_hash [slot].head;
1967 fs_hash [slot].head = 0; 3414 fs_hash [slot].head = 0;
1968 3415
1969 while (w_) 3416 while (w_)
… …
1974 w->wd = -1; 3421 w->wd = -1;
1975 3422
1976 if (fs_fd >= 0) 3423 if (fs_fd >= 0)
1977 infy_add (EV_A_ w); /* re-add, no matter what */ 3424 infy_add (EV_A_ w); /* re-add, no matter what */
1978 else 3425 else
3426 {
3427 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3428 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1979 ev_timer_start (EV_A_ &w->timer); 3429 ev_timer_again (EV_A_ &w->timer);
3430 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3431 }
1980 } 3432 }
1981
1982 } 3433 }
1983} 3434}
1984 3435
3436#endif
3437
3438#ifdef _WIN32
3439# define EV_LSTAT(p,b) _stati64 (p, b)
3440#else
3441# define EV_LSTAT(p,b) lstat (p, b)
1985#endif 3442#endif
1986 3443
1987void 3444void
1988ev_stat_stat (EV_P_ ev_stat *w) 3445ev_stat_stat (EV_P_ ev_stat *w)
1989{ 3446{
… …
1996static void noinline 3453static void noinline
1997stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3454stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1998{ 3455{
1999 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3456 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2000 3457
2001 /* we copy this here each the time so that */ 3458 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); 3459 ev_stat_stat (EV_A_ w);
2005 3460
2006 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3461 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2007 if ( 3462 if (
2008 w->prev.st_dev != w->attr.st_dev 3463 prev.st_dev != w->attr.st_dev
2009 || w->prev.st_ino != w->attr.st_ino 3464 || prev.st_ino != w->attr.st_ino
2010 || w->prev.st_mode != w->attr.st_mode 3465 || prev.st_mode != w->attr.st_mode
2011 || w->prev.st_nlink != w->attr.st_nlink 3466 || prev.st_nlink != w->attr.st_nlink
2012 || w->prev.st_uid != w->attr.st_uid 3467 || prev.st_uid != w->attr.st_uid
2013 || w->prev.st_gid != w->attr.st_gid 3468 || prev.st_gid != w->attr.st_gid
2014 || w->prev.st_rdev != w->attr.st_rdev 3469 || prev.st_rdev != w->attr.st_rdev
2015 || w->prev.st_size != w->attr.st_size 3470 || prev.st_size != w->attr.st_size
2016 || w->prev.st_atime != w->attr.st_atime 3471 || prev.st_atime != w->attr.st_atime
2017 || w->prev.st_mtime != w->attr.st_mtime 3472 || prev.st_mtime != w->attr.st_mtime
2018 || w->prev.st_ctime != w->attr.st_ctime 3473 || prev.st_ctime != w->attr.st_ctime
2019 ) { 3474 ) {
3475 /* we only update w->prev on actual differences */
3476 /* in case we test more often than invoke the callback, */
3477 /* to ensure that prev is always different to attr */
3478 w->prev = prev;
3479
2020 #if EV_USE_INOTIFY 3480 #if EV_USE_INOTIFY
3481 if (fs_fd >= 0)
3482 {
2021 infy_del (EV_A_ w); 3483 infy_del (EV_A_ w);
2022 infy_add (EV_A_ w); 3484 infy_add (EV_A_ w);
2023 ev_stat_stat (EV_A_ w); /* avoid race... */ 3485 ev_stat_stat (EV_A_ w); /* avoid race... */
3486 }
2024 #endif 3487 #endif
2025 3488
2026 ev_feed_event (EV_A_ w, EV_STAT); 3489 ev_feed_event (EV_A_ w, EV_STAT);
2027 } 3490 }
2028} 3491}
… …
2031ev_stat_start (EV_P_ ev_stat *w) 3494ev_stat_start (EV_P_ ev_stat *w)
2032{ 3495{
2033 if (expect_false (ev_is_active (w))) 3496 if (expect_false (ev_is_active (w)))
2034 return; 3497 return;
2035 3498
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); 3499 ev_stat_stat (EV_A_ w);
2041 3500
3501 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2042 if (w->interval < MIN_STAT_INTERVAL) 3502 w->interval = MIN_STAT_INTERVAL;
2043 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2044 3503
2045 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3504 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)); 3505 ev_set_priority (&w->timer, ev_priority (w));
2047 3506
2048#if EV_USE_INOTIFY 3507#if EV_USE_INOTIFY
2049 infy_init (EV_A); 3508 infy_init (EV_A);
2050 3509
2051 if (fs_fd >= 0) 3510 if (fs_fd >= 0)
2052 infy_add (EV_A_ w); 3511 infy_add (EV_A_ w);
2053 else 3512 else
2054#endif 3513#endif
3514 {
2055 ev_timer_start (EV_A_ &w->timer); 3515 ev_timer_again (EV_A_ &w->timer);
3516 ev_unref (EV_A);
3517 }
2056 3518
2057 ev_start (EV_A_ (W)w, 1); 3519 ev_start (EV_A_ (W)w, 1);
3520
3521 EV_FREQUENT_CHECK;
2058} 3522}
2059 3523
2060void 3524void
2061ev_stat_stop (EV_P_ ev_stat *w) 3525ev_stat_stop (EV_P_ ev_stat *w)
2062{ 3526{
2063 clear_pending (EV_A_ (W)w); 3527 clear_pending (EV_A_ (W)w);
2064 if (expect_false (!ev_is_active (w))) 3528 if (expect_false (!ev_is_active (w)))
2065 return; 3529 return;
2066 3530
3531 EV_FREQUENT_CHECK;
3532
2067#if EV_USE_INOTIFY 3533#if EV_USE_INOTIFY
2068 infy_del (EV_A_ w); 3534 infy_del (EV_A_ w);
2069#endif 3535#endif
3536
3537 if (ev_is_active (&w->timer))
3538 {
3539 ev_ref (EV_A);
2070 ev_timer_stop (EV_A_ &w->timer); 3540 ev_timer_stop (EV_A_ &w->timer);
3541 }
2071 3542
2072 ev_stop (EV_A_ (W)w); 3543 ev_stop (EV_A_ (W)w);
3544
3545 EV_FREQUENT_CHECK;
2073} 3546}
2074#endif 3547#endif
2075 3548
2076#if EV_IDLE_ENABLE 3549#if EV_IDLE_ENABLE
2077void 3550void
… …
2080 if (expect_false (ev_is_active (w))) 3553 if (expect_false (ev_is_active (w)))
2081 return; 3554 return;
2082 3555
2083 pri_adjust (EV_A_ (W)w); 3556 pri_adjust (EV_A_ (W)w);
2084 3557
3558 EV_FREQUENT_CHECK;
3559
2085 { 3560 {
2086 int active = ++idlecnt [ABSPRI (w)]; 3561 int active = ++idlecnt [ABSPRI (w)];
2087 3562
2088 ++idleall; 3563 ++idleall;
2089 ev_start (EV_A_ (W)w, active); 3564 ev_start (EV_A_ (W)w, active);
2090 3565
2091 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3566 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2092 idles [ABSPRI (w)][active - 1] = w; 3567 idles [ABSPRI (w)][active - 1] = w;
2093 } 3568 }
3569
3570 EV_FREQUENT_CHECK;
2094} 3571}
2095 3572
2096void 3573void
2097ev_idle_stop (EV_P_ ev_idle *w) 3574ev_idle_stop (EV_P_ ev_idle *w)
2098{ 3575{
2099 clear_pending (EV_A_ (W)w); 3576 clear_pending (EV_A_ (W)w);
2100 if (expect_false (!ev_is_active (w))) 3577 if (expect_false (!ev_is_active (w)))
2101 return; 3578 return;
2102 3579
3580 EV_FREQUENT_CHECK;
3581
2103 { 3582 {
2104 int active = ((W)w)->active; 3583 int active = ev_active (w);
2105 3584
2106 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3585 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2107 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3586 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2108 3587
2109 ev_stop (EV_A_ (W)w); 3588 ev_stop (EV_A_ (W)w);
2110 --idleall; 3589 --idleall;
2111 } 3590 }
2112}
2113#endif
2114 3591
3592 EV_FREQUENT_CHECK;
3593}
3594#endif
3595
3596#if EV_PREPARE_ENABLE
2115void 3597void
2116ev_prepare_start (EV_P_ ev_prepare *w) 3598ev_prepare_start (EV_P_ ev_prepare *w)
2117{ 3599{
2118 if (expect_false (ev_is_active (w))) 3600 if (expect_false (ev_is_active (w)))
2119 return; 3601 return;
3602
3603 EV_FREQUENT_CHECK;
2120 3604
2121 ev_start (EV_A_ (W)w, ++preparecnt); 3605 ev_start (EV_A_ (W)w, ++preparecnt);
2122 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3606 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2123 prepares [preparecnt - 1] = w; 3607 prepares [preparecnt - 1] = w;
3608
3609 EV_FREQUENT_CHECK;
2124} 3610}
2125 3611
2126void 3612void
2127ev_prepare_stop (EV_P_ ev_prepare *w) 3613ev_prepare_stop (EV_P_ ev_prepare *w)
2128{ 3614{
2129 clear_pending (EV_A_ (W)w); 3615 clear_pending (EV_A_ (W)w);
2130 if (expect_false (!ev_is_active (w))) 3616 if (expect_false (!ev_is_active (w)))
2131 return; 3617 return;
2132 3618
3619 EV_FREQUENT_CHECK;
3620
2133 { 3621 {
2134 int active = ((W)w)->active; 3622 int active = ev_active (w);
3623
2135 prepares [active - 1] = prepares [--preparecnt]; 3624 prepares [active - 1] = prepares [--preparecnt];
2136 ((W)prepares [active - 1])->active = active; 3625 ev_active (prepares [active - 1]) = active;
2137 } 3626 }
2138 3627
2139 ev_stop (EV_A_ (W)w); 3628 ev_stop (EV_A_ (W)w);
2140}
2141 3629
3630 EV_FREQUENT_CHECK;
3631}
3632#endif
3633
3634#if EV_CHECK_ENABLE
2142void 3635void
2143ev_check_start (EV_P_ ev_check *w) 3636ev_check_start (EV_P_ ev_check *w)
2144{ 3637{
2145 if (expect_false (ev_is_active (w))) 3638 if (expect_false (ev_is_active (w)))
2146 return; 3639 return;
3640
3641 EV_FREQUENT_CHECK;
2147 3642
2148 ev_start (EV_A_ (W)w, ++checkcnt); 3643 ev_start (EV_A_ (W)w, ++checkcnt);
2149 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3644 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2150 checks [checkcnt - 1] = w; 3645 checks [checkcnt - 1] = w;
3646
3647 EV_FREQUENT_CHECK;
2151} 3648}
2152 3649
2153void 3650void
2154ev_check_stop (EV_P_ ev_check *w) 3651ev_check_stop (EV_P_ ev_check *w)
2155{ 3652{
2156 clear_pending (EV_A_ (W)w); 3653 clear_pending (EV_A_ (W)w);
2157 if (expect_false (!ev_is_active (w))) 3654 if (expect_false (!ev_is_active (w)))
2158 return; 3655 return;
2159 3656
3657 EV_FREQUENT_CHECK;
3658
2160 { 3659 {
2161 int active = ((W)w)->active; 3660 int active = ev_active (w);
3661
2162 checks [active - 1] = checks [--checkcnt]; 3662 checks [active - 1] = checks [--checkcnt];
2163 ((W)checks [active - 1])->active = active; 3663 ev_active (checks [active - 1]) = active;
2164 } 3664 }
2165 3665
2166 ev_stop (EV_A_ (W)w); 3666 ev_stop (EV_A_ (W)w);
3667
3668 EV_FREQUENT_CHECK;
2167} 3669}
3670#endif
2168 3671
2169#if EV_EMBED_ENABLE 3672#if EV_EMBED_ENABLE
2170void noinline 3673void noinline
2171ev_embed_sweep (EV_P_ ev_embed *w) 3674ev_embed_sweep (EV_P_ ev_embed *w)
2172{ 3675{
2173 ev_loop (w->loop, EVLOOP_NONBLOCK); 3676 ev_run (w->other, EVRUN_NOWAIT);
2174} 3677}
2175 3678
2176static void 3679static void
2177embed_cb (EV_P_ ev_io *io, int revents) 3680embed_io_cb (EV_P_ ev_io *io, int revents)
2178{ 3681{
2179 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3682 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2180 3683
2181 if (ev_cb (w)) 3684 if (ev_cb (w))
2182 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3685 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2183 else 3686 else
2184 ev_embed_sweep (loop, w); 3687 ev_run (w->other, EVRUN_NOWAIT);
2185} 3688}
3689
3690static void
3691embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3692{
3693 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3694
3695 {
3696 EV_P = w->other;
3697
3698 while (fdchangecnt)
3699 {
3700 fd_reify (EV_A);
3701 ev_run (EV_A_ EVRUN_NOWAIT);
3702 }
3703 }
3704}
3705
3706static void
3707embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3708{
3709 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3710
3711 ev_embed_stop (EV_A_ w);
3712
3713 {
3714 EV_P = w->other;
3715
3716 ev_loop_fork (EV_A);
3717 ev_run (EV_A_ EVRUN_NOWAIT);
3718 }
3719
3720 ev_embed_start (EV_A_ w);
3721}
3722
3723#if 0
3724static void
3725embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3726{
3727 ev_idle_stop (EV_A_ idle);
3728}
3729#endif
2186 3730
2187void 3731void
2188ev_embed_start (EV_P_ ev_embed *w) 3732ev_embed_start (EV_P_ ev_embed *w)
2189{ 3733{
2190 if (expect_false (ev_is_active (w))) 3734 if (expect_false (ev_is_active (w)))
2191 return; 3735 return;
2192 3736
2193 { 3737 {
2194 struct ev_loop *loop = w->loop; 3738 EV_P = w->other;
2195 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3739 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); 3740 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2197 } 3741 }
3742
3743 EV_FREQUENT_CHECK;
2198 3744
2199 ev_set_priority (&w->io, ev_priority (w)); 3745 ev_set_priority (&w->io, ev_priority (w));
2200 ev_io_start (EV_A_ &w->io); 3746 ev_io_start (EV_A_ &w->io);
2201 3747
3748 ev_prepare_init (&w->prepare, embed_prepare_cb);
3749 ev_set_priority (&w->prepare, EV_MINPRI);
3750 ev_prepare_start (EV_A_ &w->prepare);
3751
3752 ev_fork_init (&w->fork, embed_fork_cb);
3753 ev_fork_start (EV_A_ &w->fork);
3754
3755 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3756
2202 ev_start (EV_A_ (W)w, 1); 3757 ev_start (EV_A_ (W)w, 1);
3758
3759 EV_FREQUENT_CHECK;
2203} 3760}
2204 3761
2205void 3762void
2206ev_embed_stop (EV_P_ ev_embed *w) 3763ev_embed_stop (EV_P_ ev_embed *w)
2207{ 3764{
2208 clear_pending (EV_A_ (W)w); 3765 clear_pending (EV_A_ (W)w);
2209 if (expect_false (!ev_is_active (w))) 3766 if (expect_false (!ev_is_active (w)))
2210 return; 3767 return;
2211 3768
3769 EV_FREQUENT_CHECK;
3770
2212 ev_io_stop (EV_A_ &w->io); 3771 ev_io_stop (EV_A_ &w->io);
3772 ev_prepare_stop (EV_A_ &w->prepare);
3773 ev_fork_stop (EV_A_ &w->fork);
2213 3774
2214 ev_stop (EV_A_ (W)w); 3775 ev_stop (EV_A_ (W)w);
3776
3777 EV_FREQUENT_CHECK;
2215} 3778}
2216#endif 3779#endif
2217 3780
2218#if EV_FORK_ENABLE 3781#if EV_FORK_ENABLE
2219void 3782void
2220ev_fork_start (EV_P_ ev_fork *w) 3783ev_fork_start (EV_P_ ev_fork *w)
2221{ 3784{
2222 if (expect_false (ev_is_active (w))) 3785 if (expect_false (ev_is_active (w)))
2223 return; 3786 return;
2224 3787
3788 EV_FREQUENT_CHECK;
3789
2225 ev_start (EV_A_ (W)w, ++forkcnt); 3790 ev_start (EV_A_ (W)w, ++forkcnt);
2226 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3791 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2227 forks [forkcnt - 1] = w; 3792 forks [forkcnt - 1] = w;
3793
3794 EV_FREQUENT_CHECK;
2228} 3795}
2229 3796
2230void 3797void
2231ev_fork_stop (EV_P_ ev_fork *w) 3798ev_fork_stop (EV_P_ ev_fork *w)
2232{ 3799{
2233 clear_pending (EV_A_ (W)w); 3800 clear_pending (EV_A_ (W)w);
2234 if (expect_false (!ev_is_active (w))) 3801 if (expect_false (!ev_is_active (w)))
2235 return; 3802 return;
2236 3803
3804 EV_FREQUENT_CHECK;
3805
2237 { 3806 {
2238 int active = ((W)w)->active; 3807 int active = ev_active (w);
3808
2239 forks [active - 1] = forks [--forkcnt]; 3809 forks [active - 1] = forks [--forkcnt];
2240 ((W)forks [active - 1])->active = active; 3810 ev_active (forks [active - 1]) = active;
2241 } 3811 }
2242 3812
2243 ev_stop (EV_A_ (W)w); 3813 ev_stop (EV_A_ (W)w);
3814
3815 EV_FREQUENT_CHECK;
3816}
3817#endif
3818
3819#if EV_CLEANUP_ENABLE
3820void
3821ev_cleanup_start (EV_P_ ev_cleanup *w)
3822{
3823 if (expect_false (ev_is_active (w)))
3824 return;
3825
3826 EV_FREQUENT_CHECK;
3827
3828 ev_start (EV_A_ (W)w, ++cleanupcnt);
3829 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3830 cleanups [cleanupcnt - 1] = w;
3831
3832 /* cleanup watchers should never keep a refcount on the loop */
3833 ev_unref (EV_A);
3834 EV_FREQUENT_CHECK;
3835}
3836
3837void
3838ev_cleanup_stop (EV_P_ ev_cleanup *w)
3839{
3840 clear_pending (EV_A_ (W)w);
3841 if (expect_false (!ev_is_active (w)))
3842 return;
3843
3844 EV_FREQUENT_CHECK;
3845 ev_ref (EV_A);
3846
3847 {
3848 int active = ev_active (w);
3849
3850 cleanups [active - 1] = cleanups [--cleanupcnt];
3851 ev_active (cleanups [active - 1]) = active;
3852 }
3853
3854 ev_stop (EV_A_ (W)w);
3855
3856 EV_FREQUENT_CHECK;
3857}
3858#endif
3859
3860#if EV_ASYNC_ENABLE
3861void
3862ev_async_start (EV_P_ ev_async *w)
3863{
3864 if (expect_false (ev_is_active (w)))
3865 return;
3866
3867 w->sent = 0;
3868
3869 evpipe_init (EV_A);
3870
3871 EV_FREQUENT_CHECK;
3872
3873 ev_start (EV_A_ (W)w, ++asynccnt);
3874 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3875 asyncs [asynccnt - 1] = w;
3876
3877 EV_FREQUENT_CHECK;
3878}
3879
3880void
3881ev_async_stop (EV_P_ ev_async *w)
3882{
3883 clear_pending (EV_A_ (W)w);
3884 if (expect_false (!ev_is_active (w)))
3885 return;
3886
3887 EV_FREQUENT_CHECK;
3888
3889 {
3890 int active = ev_active (w);
3891
3892 asyncs [active - 1] = asyncs [--asynccnt];
3893 ev_active (asyncs [active - 1]) = active;
3894 }
3895
3896 ev_stop (EV_A_ (W)w);
3897
3898 EV_FREQUENT_CHECK;
3899}
3900
3901void
3902ev_async_send (EV_P_ ev_async *w)
3903{
3904 w->sent = 1;
3905 evpipe_write (EV_A_ &async_pending);
2244} 3906}
2245#endif 3907#endif
2246 3908
2247/*****************************************************************************/ 3909/*****************************************************************************/
2248 3910
… …
2258once_cb (EV_P_ struct ev_once *once, int revents) 3920once_cb (EV_P_ struct ev_once *once, int revents)
2259{ 3921{
2260 void (*cb)(int revents, void *arg) = once->cb; 3922 void (*cb)(int revents, void *arg) = once->cb;
2261 void *arg = once->arg; 3923 void *arg = once->arg;
2262 3924
2263 ev_io_stop (EV_A_ &once->io); 3925 ev_io_stop (EV_A_ &once->io);
2264 ev_timer_stop (EV_A_ &once->to); 3926 ev_timer_stop (EV_A_ &once->to);
2265 ev_free (once); 3927 ev_free (once);
2266 3928
2267 cb (revents, arg); 3929 cb (revents, arg);
2268} 3930}
2269 3931
2270static void 3932static void
2271once_cb_io (EV_P_ ev_io *w, int revents) 3933once_cb_io (EV_P_ ev_io *w, int revents)
2272{ 3934{
2273 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3935 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3936
3937 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2274} 3938}
2275 3939
2276static void 3940static void
2277once_cb_to (EV_P_ ev_timer *w, int revents) 3941once_cb_to (EV_P_ ev_timer *w, int revents)
2278{ 3942{
2279 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3943 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3944
3945 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2280} 3946}
2281 3947
2282void 3948void
2283ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3949ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2284{ 3950{
2285 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3951 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2286 3952
2287 if (expect_false (!once)) 3953 if (expect_false (!once))
2288 { 3954 {
2289 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3955 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2290 return; 3956 return;
2291 } 3957 }
2292 3958
2293 once->cb = cb; 3959 once->cb = cb;
2294 once->arg = arg; 3960 once->arg = arg;
… …
2306 ev_timer_set (&once->to, timeout, 0.); 3972 ev_timer_set (&once->to, timeout, 0.);
2307 ev_timer_start (EV_A_ &once->to); 3973 ev_timer_start (EV_A_ &once->to);
2308 } 3974 }
2309} 3975}
2310 3976
2311#ifdef __cplusplus 3977/*****************************************************************************/
2312} 3978
3979#if EV_WALK_ENABLE
3980void ecb_cold
3981ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3982{
3983 int i, j;
3984 ev_watcher_list *wl, *wn;
3985
3986 if (types & (EV_IO | EV_EMBED))
3987 for (i = 0; i < anfdmax; ++i)
3988 for (wl = anfds [i].head; wl; )
3989 {
3990 wn = wl->next;
3991
3992#if EV_EMBED_ENABLE
3993 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3994 {
3995 if (types & EV_EMBED)
3996 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3997 }
3998 else
3999#endif
4000#if EV_USE_INOTIFY
4001 if (ev_cb ((ev_io *)wl) == infy_cb)
4002 ;
4003 else
4004#endif
4005 if ((ev_io *)wl != &pipe_w)
4006 if (types & EV_IO)
4007 cb (EV_A_ EV_IO, wl);
4008
4009 wl = wn;
4010 }
4011
4012 if (types & (EV_TIMER | EV_STAT))
4013 for (i = timercnt + HEAP0; i-- > HEAP0; )
4014#if EV_STAT_ENABLE
4015 /*TODO: timer is not always active*/
4016 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4017 {
4018 if (types & EV_STAT)
4019 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4020 }
4021 else
4022#endif
4023 if (types & EV_TIMER)
4024 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4025
4026#if EV_PERIODIC_ENABLE
4027 if (types & EV_PERIODIC)
4028 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4029 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4030#endif
4031
4032#if EV_IDLE_ENABLE
4033 if (types & EV_IDLE)
4034 for (j = NUMPRI; i--; )
4035 for (i = idlecnt [j]; i--; )
4036 cb (EV_A_ EV_IDLE, idles [j][i]);
4037#endif
4038
4039#if EV_FORK_ENABLE
4040 if (types & EV_FORK)
4041 for (i = forkcnt; i--; )
4042 if (ev_cb (forks [i]) != embed_fork_cb)
4043 cb (EV_A_ EV_FORK, forks [i]);
4044#endif
4045
4046#if EV_ASYNC_ENABLE
4047 if (types & EV_ASYNC)
4048 for (i = asynccnt; i--; )
4049 cb (EV_A_ EV_ASYNC, asyncs [i]);
4050#endif
4051
4052#if EV_PREPARE_ENABLE
4053 if (types & EV_PREPARE)
4054 for (i = preparecnt; i--; )
4055# if EV_EMBED_ENABLE
4056 if (ev_cb (prepares [i]) != embed_prepare_cb)
2313#endif 4057# endif
4058 cb (EV_A_ EV_PREPARE, prepares [i]);
4059#endif
2314 4060
4061#if EV_CHECK_ENABLE
4062 if (types & EV_CHECK)
4063 for (i = checkcnt; i--; )
4064 cb (EV_A_ EV_CHECK, checks [i]);
4065#endif
4066
4067#if EV_SIGNAL_ENABLE
4068 if (types & EV_SIGNAL)
4069 for (i = 0; i < EV_NSIG - 1; ++i)
4070 for (wl = signals [i].head; wl; )
4071 {
4072 wn = wl->next;
4073 cb (EV_A_ EV_SIGNAL, wl);
4074 wl = wn;
4075 }
4076#endif
4077
4078#if EV_CHILD_ENABLE
4079 if (types & EV_CHILD)
4080 for (i = (EV_PID_HASHSIZE); i--; )
4081 for (wl = childs [i]; wl; )
4082 {
4083 wn = wl->next;
4084 cb (EV_A_ EV_CHILD, wl);
4085 wl = wn;
4086 }
4087#endif
4088/* EV_STAT 0x00001000 /* stat data changed */
4089/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4090}
4091#endif
4092
4093#if EV_MULTIPLICITY
4094 #include "ev_wrap.h"
4095#endif
4096
4097EV_CPP(})
4098

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