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Comparing libev/ev.c (file contents):
Revision 1.169 by root, Sat Dec 8 14:27:39 2007 UTC vs.
Revision 1.382 by sf-exg, Thu Jun 30 13:13:59 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/**/
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
456/*
457 * This is used to work around floating point rounding problems.
458 * This value is good at least till the year 4000.
459 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
220 462
221#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) */
222#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) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
224 465
225#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)
226# 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)
227# 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
228#else 493#else
229# define expect(expr,value) (expr) 494 #define ecb_inline static
230# define noinline
231# if __STDC_VERSION__ < 199901L
232# define inline
233# endif 495#endif
234#endif
235 496
497#if ECB_GCC_VERSION(3,1)
498 #define ecb_attribute(attrlist) __attribute__(attrlist)
499 #define ecb_is_constant(expr) __builtin_constant_p (expr)
500 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
501 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
502#else
503 #define ecb_attribute(attrlist)
504 #define ecb_is_constant(expr) 0
505 #define ecb_expect(expr,value) (expr)
506 #define ecb_prefetch(addr,rw,locality)
507#endif
508
509#define ecb_noinline ecb_attribute ((__noinline__))
510#define ecb_noreturn ecb_attribute ((__noreturn__))
511#define ecb_unused ecb_attribute ((__unused__))
512#define ecb_const ecb_attribute ((__const__))
513#define ecb_pure ecb_attribute ((__pure__))
514
515#if ECB_GCC_VERSION(4,3)
516 #define ecb_artificial ecb_attribute ((__artificial__))
517 #define ecb_hot ecb_attribute ((__hot__))
518 #define ecb_cold ecb_attribute ((__cold__))
519#else
520 #define ecb_artificial
521 #define ecb_hot
522 #define ecb_cold
523#endif
524
525/* put around conditional expressions if you are very sure that the */
526/* expression is mostly true or mostly false. note that these return */
527/* booleans, not the expression. */
236#define expect_false(expr) expect ((expr) != 0, 0) 528#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
237#define expect_true(expr) expect ((expr) != 0, 1) 529#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
530/* ecb.h end */
531
532#define expect_false(cond) ecb_expect_false (cond)
533#define expect_true(cond) ecb_expect_true (cond)
534#define noinline ecb_noinline
535
238#define inline_size static inline 536#define inline_size ecb_inline
239 537
240#if EV_MINIMAL 538#if EV_FEATURE_CODE
539# define inline_speed ecb_inline
540#else
241# define inline_speed static noinline 541# define inline_speed static noinline
542#endif
543
544#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
545
546#if EV_MINPRI == EV_MAXPRI
547# define ABSPRI(w) (((W)w), 0)
242#else 548#else
243# define inline_speed static inline
244#endif
245
246#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
247#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 549# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
550#endif
248 551
249#define EMPTY /* required for microsofts broken pseudo-c compiler */ 552#define EMPTY /* required for microsofts broken pseudo-c compiler */
250#define EMPTY2(a,b) /* used to suppress some warnings */ 553#define EMPTY2(a,b) /* used to suppress some warnings */
251 554
252typedef ev_watcher *W; 555typedef ev_watcher *W;
253typedef ev_watcher_list *WL; 556typedef ev_watcher_list *WL;
254typedef ev_watcher_time *WT; 557typedef ev_watcher_time *WT;
255 558
559#define ev_active(w) ((W)(w))->active
560#define ev_at(w) ((WT)(w))->at
561
562#if EV_USE_REALTIME
563/* sig_atomic_t is used to avoid per-thread variables or locking but still */
564/* giving it a reasonably high chance of working on typical architectures */
565static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
566#endif
567
568#if EV_USE_MONOTONIC
256static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 569static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
570#endif
571
572#ifndef EV_FD_TO_WIN32_HANDLE
573# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
574#endif
575#ifndef EV_WIN32_HANDLE_TO_FD
576# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
577#endif
578#ifndef EV_WIN32_CLOSE_FD
579# define EV_WIN32_CLOSE_FD(fd) close (fd)
580#endif
257 581
258#ifdef _WIN32 582#ifdef _WIN32
259# include "ev_win32.c" 583# include "ev_win32.c"
260#endif 584#endif
261 585
262/*****************************************************************************/ 586/*****************************************************************************/
263 587
588/* define a suitable floor function (only used by periodics atm) */
589
590#if EV_USE_FLOOR
591# include <math.h>
592# define ev_floor(v) floor (v)
593#else
594
595#include <float.h>
596
597/* a floor() replacement function, should be independent of ev_tstamp type */
598static ev_tstamp noinline
599ev_floor (ev_tstamp v)
600{
601 /* the choice of shift factor is not terribly important */
602#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
603 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
604#else
605 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
606#endif
607
608 /* argument too large for an unsigned long? */
609 if (expect_false (v >= shift))
610 {
611 ev_tstamp f;
612
613 if (v == v - 1.)
614 return v; /* very large number */
615
616 f = shift * ev_floor (v * (1. / shift));
617 return f + ev_floor (v - f);
618 }
619
620 /* special treatment for negative args? */
621 if (expect_false (v < 0.))
622 {
623 ev_tstamp f = -ev_floor (-v);
624
625 return f - (f == v ? 0 : 1);
626 }
627
628 /* fits into an unsigned long */
629 return (unsigned long)v;
630}
631
632#endif
633
634/*****************************************************************************/
635
636#ifdef __linux
637# include <sys/utsname.h>
638#endif
639
640static unsigned int noinline ecb_cold
641ev_linux_version (void)
642{
643#ifdef __linux
644 unsigned int v = 0;
645 struct utsname buf;
646 int i;
647 char *p = buf.release;
648
649 if (uname (&buf))
650 return 0;
651
652 for (i = 3+1; --i; )
653 {
654 unsigned int c = 0;
655
656 for (;;)
657 {
658 if (*p >= '0' && *p <= '9')
659 c = c * 10 + *p++ - '0';
660 else
661 {
662 p += *p == '.';
663 break;
664 }
665 }
666
667 v = (v << 8) | c;
668 }
669
670 return v;
671#else
672 return 0;
673#endif
674}
675
676/*****************************************************************************/
677
678#if EV_AVOID_STDIO
679static void noinline ecb_cold
680ev_printerr (const char *msg)
681{
682 write (STDERR_FILENO, msg, strlen (msg));
683}
684#endif
685
264static void (*syserr_cb)(const char *msg); 686static void (*syserr_cb)(const char *msg);
265 687
266void 688void ecb_cold
267ev_set_syserr_cb (void (*cb)(const char *msg)) 689ev_set_syserr_cb (void (*cb)(const char *msg))
268{ 690{
269 syserr_cb = cb; 691 syserr_cb = cb;
270} 692}
271 693
272static void noinline 694static void noinline ecb_cold
273syserr (const char *msg) 695ev_syserr (const char *msg)
274{ 696{
275 if (!msg) 697 if (!msg)
276 msg = "(libev) system error"; 698 msg = "(libev) system error";
277 699
278 if (syserr_cb) 700 if (syserr_cb)
279 syserr_cb (msg); 701 syserr_cb (msg);
280 else 702 else
281 { 703 {
704#if EV_AVOID_STDIO
705 ev_printerr (msg);
706 ev_printerr (": ");
707 ev_printerr (strerror (errno));
708 ev_printerr ("\n");
709#else
282 perror (msg); 710 perror (msg);
711#endif
283 abort (); 712 abort ();
284 } 713 }
285} 714}
286 715
716static void *
717ev_realloc_emul (void *ptr, long size)
718{
719#if __GLIBC__
720 return realloc (ptr, size);
721#else
722 /* some systems, notably openbsd and darwin, fail to properly
723 * implement realloc (x, 0) (as required by both ansi c-89 and
724 * the single unix specification, so work around them here.
725 */
726
727 if (size)
728 return realloc (ptr, size);
729
730 free (ptr);
731 return 0;
732#endif
733}
734
287static void *(*alloc)(void *ptr, long size); 735static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
288 736
289void 737void ecb_cold
290ev_set_allocator (void *(*cb)(void *ptr, long size)) 738ev_set_allocator (void *(*cb)(void *ptr, long size))
291{ 739{
292 alloc = cb; 740 alloc = cb;
293} 741}
294 742
295inline_speed void * 743inline_speed void *
296ev_realloc (void *ptr, long size) 744ev_realloc (void *ptr, long size)
297{ 745{
298 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 746 ptr = alloc (ptr, size);
299 747
300 if (!ptr && size) 748 if (!ptr && size)
301 { 749 {
750#if EV_AVOID_STDIO
751 ev_printerr ("(libev) memory allocation failed, aborting.\n");
752#else
302 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 753 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
754#endif
303 abort (); 755 abort ();
304 } 756 }
305 757
306 return ptr; 758 return ptr;
307} 759}
… …
309#define ev_malloc(size) ev_realloc (0, (size)) 761#define ev_malloc(size) ev_realloc (0, (size))
310#define ev_free(ptr) ev_realloc ((ptr), 0) 762#define ev_free(ptr) ev_realloc ((ptr), 0)
311 763
312/*****************************************************************************/ 764/*****************************************************************************/
313 765
766/* set in reify when reification needed */
767#define EV_ANFD_REIFY 1
768
769/* file descriptor info structure */
314typedef struct 770typedef struct
315{ 771{
316 WL head; 772 WL head;
317 unsigned char events; 773 unsigned char events; /* the events watched for */
774 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
775 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
318 unsigned char reify; 776 unsigned char unused;
777#if EV_USE_EPOLL
778 unsigned int egen; /* generation counter to counter epoll bugs */
779#endif
319#if EV_SELECT_IS_WINSOCKET 780#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
320 SOCKET handle; 781 SOCKET handle;
321#endif 782#endif
783#if EV_USE_IOCP
784 OVERLAPPED or, ow;
785#endif
322} ANFD; 786} ANFD;
323 787
788/* stores the pending event set for a given watcher */
324typedef struct 789typedef struct
325{ 790{
326 W w; 791 W w;
327 int events; 792 int events; /* the pending event set for the given watcher */
328} ANPENDING; 793} ANPENDING;
329 794
330#if EV_USE_INOTIFY 795#if EV_USE_INOTIFY
796/* hash table entry per inotify-id */
331typedef struct 797typedef struct
332{ 798{
333 WL head; 799 WL head;
334} ANFS; 800} ANFS;
801#endif
802
803/* Heap Entry */
804#if EV_HEAP_CACHE_AT
805 /* a heap element */
806 typedef struct {
807 ev_tstamp at;
808 WT w;
809 } ANHE;
810
811 #define ANHE_w(he) (he).w /* access watcher, read-write */
812 #define ANHE_at(he) (he).at /* access cached at, read-only */
813 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
814#else
815 /* a heap element */
816 typedef WT ANHE;
817
818 #define ANHE_w(he) (he)
819 #define ANHE_at(he) (he)->at
820 #define ANHE_at_cache(he)
335#endif 821#endif
336 822
337#if EV_MULTIPLICITY 823#if EV_MULTIPLICITY
338 824
339 struct ev_loop 825 struct ev_loop
… …
358 844
359 static int ev_default_loop_ptr; 845 static int ev_default_loop_ptr;
360 846
361#endif 847#endif
362 848
849#if EV_FEATURE_API
850# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
851# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
852# define EV_INVOKE_PENDING invoke_cb (EV_A)
853#else
854# define EV_RELEASE_CB (void)0
855# define EV_ACQUIRE_CB (void)0
856# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
857#endif
858
859#define EVBREAK_RECURSE 0x80
860
363/*****************************************************************************/ 861/*****************************************************************************/
364 862
863#ifndef EV_HAVE_EV_TIME
365ev_tstamp 864ev_tstamp
366ev_time (void) 865ev_time (void)
367{ 866{
368#if EV_USE_REALTIME 867#if EV_USE_REALTIME
868 if (expect_true (have_realtime))
869 {
369 struct timespec ts; 870 struct timespec ts;
370 clock_gettime (CLOCK_REALTIME, &ts); 871 clock_gettime (CLOCK_REALTIME, &ts);
371 return ts.tv_sec + ts.tv_nsec * 1e-9; 872 return ts.tv_sec + ts.tv_nsec * 1e-9;
372#else 873 }
874#endif
875
373 struct timeval tv; 876 struct timeval tv;
374 gettimeofday (&tv, 0); 877 gettimeofday (&tv, 0);
375 return tv.tv_sec + tv.tv_usec * 1e-6; 878 return tv.tv_sec + tv.tv_usec * 1e-6;
376#endif
377} 879}
880#endif
378 881
379ev_tstamp inline_size 882inline_size ev_tstamp
380get_clock (void) 883get_clock (void)
381{ 884{
382#if EV_USE_MONOTONIC 885#if EV_USE_MONOTONIC
383 if (expect_true (have_monotonic)) 886 if (expect_true (have_monotonic))
384 { 887 {
… …
397{ 900{
398 return ev_rt_now; 901 return ev_rt_now;
399} 902}
400#endif 903#endif
401 904
402int inline_size 905void
906ev_sleep (ev_tstamp delay)
907{
908 if (delay > 0.)
909 {
910#if EV_USE_NANOSLEEP
911 struct timespec ts;
912
913 EV_TS_SET (ts, delay);
914 nanosleep (&ts, 0);
915#elif defined(_WIN32)
916 Sleep ((unsigned long)(delay * 1e3));
917#else
918 struct timeval tv;
919
920 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
921 /* something not guaranteed by newer posix versions, but guaranteed */
922 /* by older ones */
923 EV_TV_SET (tv, delay);
924 select (0, 0, 0, 0, &tv);
925#endif
926 }
927}
928
929/*****************************************************************************/
930
931#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
932
933/* find a suitable new size for the given array, */
934/* hopefully by rounding to a nice-to-malloc size */
935inline_size int
403array_nextsize (int elem, int cur, int cnt) 936array_nextsize (int elem, int cur, int cnt)
404{ 937{
405 int ncur = cur + 1; 938 int ncur = cur + 1;
406 939
407 do 940 do
408 ncur <<= 1; 941 ncur <<= 1;
409 while (cnt > ncur); 942 while (cnt > ncur);
410 943
411 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 944 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
412 if (elem * ncur > 4096) 945 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
413 { 946 {
414 ncur *= elem; 947 ncur *= elem;
415 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 948 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
416 ncur = ncur - sizeof (void *) * 4; 949 ncur = ncur - sizeof (void *) * 4;
417 ncur /= elem; 950 ncur /= elem;
418 } 951 }
419 952
420 return ncur; 953 return ncur;
421} 954}
422 955
423inline_speed void * 956static void * noinline ecb_cold
424array_realloc (int elem, void *base, int *cur, int cnt) 957array_realloc (int elem, void *base, int *cur, int cnt)
425{ 958{
426 *cur = array_nextsize (elem, *cur, cnt); 959 *cur = array_nextsize (elem, *cur, cnt);
427 return ev_realloc (base, elem * *cur); 960 return ev_realloc (base, elem * *cur);
428} 961}
962
963#define array_init_zero(base,count) \
964 memset ((void *)(base), 0, sizeof (*(base)) * (count))
429 965
430#define array_needsize(type,base,cur,cnt,init) \ 966#define array_needsize(type,base,cur,cnt,init) \
431 if (expect_false ((cnt) > (cur))) \ 967 if (expect_false ((cnt) > (cur))) \
432 { \ 968 { \
433 int ocur_ = (cur); \ 969 int ecb_unused ocur_ = (cur); \
434 (base) = (type *)array_realloc \ 970 (base) = (type *)array_realloc \
435 (sizeof (type), (base), &(cur), (cnt)); \ 971 (sizeof (type), (base), &(cur), (cnt)); \
436 init ((base) + (ocur_), (cur) - ocur_); \ 972 init ((base) + (ocur_), (cur) - ocur_); \
437 } 973 }
438 974
… …
445 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 981 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
446 } 982 }
447#endif 983#endif
448 984
449#define array_free(stem, idx) \ 985#define array_free(stem, idx) \
450 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 986 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
451 987
452/*****************************************************************************/ 988/*****************************************************************************/
989
990/* dummy callback for pending events */
991static void noinline
992pendingcb (EV_P_ ev_prepare *w, int revents)
993{
994}
453 995
454void noinline 996void noinline
455ev_feed_event (EV_P_ void *w, int revents) 997ev_feed_event (EV_P_ void *w, int revents)
456{ 998{
457 W w_ = (W)w; 999 W w_ = (W)w;
1000 int pri = ABSPRI (w_);
458 1001
459 if (expect_false (w_->pending)) 1002 if (expect_false (w_->pending))
1003 pendings [pri][w_->pending - 1].events |= revents;
1004 else
460 { 1005 {
1006 w_->pending = ++pendingcnt [pri];
1007 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1008 pendings [pri][w_->pending - 1].w = w_;
461 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1009 pendings [pri][w_->pending - 1].events = revents;
462 return;
463 } 1010 }
464
465 w_->pending = ++pendingcnt [ABSPRI (w_)];
466 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
467 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
468 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
469} 1011}
470 1012
471void inline_size 1013inline_speed void
1014feed_reverse (EV_P_ W w)
1015{
1016 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1017 rfeeds [rfeedcnt++] = w;
1018}
1019
1020inline_size void
1021feed_reverse_done (EV_P_ int revents)
1022{
1023 do
1024 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1025 while (rfeedcnt);
1026}
1027
1028inline_speed void
472queue_events (EV_P_ W *events, int eventcnt, int type) 1029queue_events (EV_P_ W *events, int eventcnt, int type)
473{ 1030{
474 int i; 1031 int i;
475 1032
476 for (i = 0; i < eventcnt; ++i) 1033 for (i = 0; i < eventcnt; ++i)
477 ev_feed_event (EV_A_ events [i], type); 1034 ev_feed_event (EV_A_ events [i], type);
478} 1035}
479 1036
480/*****************************************************************************/ 1037/*****************************************************************************/
481 1038
482void inline_size 1039inline_speed void
483anfds_init (ANFD *base, int count)
484{
485 while (count--)
486 {
487 base->head = 0;
488 base->events = EV_NONE;
489 base->reify = 0;
490
491 ++base;
492 }
493}
494
495void inline_speed
496fd_event (EV_P_ int fd, int revents) 1040fd_event_nocheck (EV_P_ int fd, int revents)
497{ 1041{
498 ANFD *anfd = anfds + fd; 1042 ANFD *anfd = anfds + fd;
499 ev_io *w; 1043 ev_io *w;
500 1044
501 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1045 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
505 if (ev) 1049 if (ev)
506 ev_feed_event (EV_A_ (W)w, ev); 1050 ev_feed_event (EV_A_ (W)w, ev);
507 } 1051 }
508} 1052}
509 1053
1054/* do not submit kernel events for fds that have reify set */
1055/* because that means they changed while we were polling for new events */
1056inline_speed void
1057fd_event (EV_P_ int fd, int revents)
1058{
1059 ANFD *anfd = anfds + fd;
1060
1061 if (expect_true (!anfd->reify))
1062 fd_event_nocheck (EV_A_ fd, revents);
1063}
1064
510void 1065void
511ev_feed_fd_event (EV_P_ int fd, int revents) 1066ev_feed_fd_event (EV_P_ int fd, int revents)
512{ 1067{
513 if (fd >= 0 && fd < anfdmax) 1068 if (fd >= 0 && fd < anfdmax)
514 fd_event (EV_A_ fd, revents); 1069 fd_event_nocheck (EV_A_ fd, revents);
515} 1070}
516 1071
517void inline_size 1072/* make sure the external fd watch events are in-sync */
1073/* with the kernel/libev internal state */
1074inline_size void
518fd_reify (EV_P) 1075fd_reify (EV_P)
519{ 1076{
520 int i; 1077 int i;
1078
1079#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1080 for (i = 0; i < fdchangecnt; ++i)
1081 {
1082 int fd = fdchanges [i];
1083 ANFD *anfd = anfds + fd;
1084
1085 if (anfd->reify & EV__IOFDSET && anfd->head)
1086 {
1087 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1088
1089 if (handle != anfd->handle)
1090 {
1091 unsigned long arg;
1092
1093 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1094
1095 /* handle changed, but fd didn't - we need to do it in two steps */
1096 backend_modify (EV_A_ fd, anfd->events, 0);
1097 anfd->events = 0;
1098 anfd->handle = handle;
1099 }
1100 }
1101 }
1102#endif
521 1103
522 for (i = 0; i < fdchangecnt; ++i) 1104 for (i = 0; i < fdchangecnt; ++i)
523 { 1105 {
524 int fd = fdchanges [i]; 1106 int fd = fdchanges [i];
525 ANFD *anfd = anfds + fd; 1107 ANFD *anfd = anfds + fd;
526 ev_io *w; 1108 ev_io *w;
527 1109
528 int events = 0; 1110 unsigned char o_events = anfd->events;
1111 unsigned char o_reify = anfd->reify;
529 1112
530 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1113 anfd->reify = 0;
531 events |= w->events;
532 1114
533#if EV_SELECT_IS_WINSOCKET 1115 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
534 if (events)
535 { 1116 {
536 unsigned long argp; 1117 anfd->events = 0;
537 anfd->handle = _get_osfhandle (fd); 1118
538 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1119 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1120 anfd->events |= (unsigned char)w->events;
1121
1122 if (o_events != anfd->events)
1123 o_reify = EV__IOFDSET; /* actually |= */
539 } 1124 }
540#endif
541 1125
542 anfd->reify = 0; 1126 if (o_reify & EV__IOFDSET)
543
544 backend_modify (EV_A_ fd, anfd->events, events); 1127 backend_modify (EV_A_ fd, o_events, anfd->events);
545 anfd->events = events;
546 } 1128 }
547 1129
548 fdchangecnt = 0; 1130 fdchangecnt = 0;
549} 1131}
550 1132
551void inline_size 1133/* something about the given fd changed */
1134inline_size void
552fd_change (EV_P_ int fd) 1135fd_change (EV_P_ int fd, int flags)
553{ 1136{
554 if (expect_false (anfds [fd].reify)) 1137 unsigned char reify = anfds [fd].reify;
555 return;
556
557 anfds [fd].reify = 1; 1138 anfds [fd].reify |= flags;
558 1139
1140 if (expect_true (!reify))
1141 {
559 ++fdchangecnt; 1142 ++fdchangecnt;
560 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1143 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
561 fdchanges [fdchangecnt - 1] = fd; 1144 fdchanges [fdchangecnt - 1] = fd;
1145 }
562} 1146}
563 1147
564void inline_speed 1148/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1149inline_speed void ecb_cold
565fd_kill (EV_P_ int fd) 1150fd_kill (EV_P_ int fd)
566{ 1151{
567 ev_io *w; 1152 ev_io *w;
568 1153
569 while ((w = (ev_io *)anfds [fd].head)) 1154 while ((w = (ev_io *)anfds [fd].head))
… …
571 ev_io_stop (EV_A_ w); 1156 ev_io_stop (EV_A_ w);
572 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1157 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
573 } 1158 }
574} 1159}
575 1160
576int inline_size 1161/* check whether the given fd is actually valid, for error recovery */
1162inline_size int ecb_cold
577fd_valid (int fd) 1163fd_valid (int fd)
578{ 1164{
579#ifdef _WIN32 1165#ifdef _WIN32
580 return _get_osfhandle (fd) != -1; 1166 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
581#else 1167#else
582 return fcntl (fd, F_GETFD) != -1; 1168 return fcntl (fd, F_GETFD) != -1;
583#endif 1169#endif
584} 1170}
585 1171
586/* called on EBADF to verify fds */ 1172/* called on EBADF to verify fds */
587static void noinline 1173static void noinline ecb_cold
588fd_ebadf (EV_P) 1174fd_ebadf (EV_P)
589{ 1175{
590 int fd; 1176 int fd;
591 1177
592 for (fd = 0; fd < anfdmax; ++fd) 1178 for (fd = 0; fd < anfdmax; ++fd)
593 if (anfds [fd].events) 1179 if (anfds [fd].events)
594 if (!fd_valid (fd) == -1 && errno == EBADF) 1180 if (!fd_valid (fd) && errno == EBADF)
595 fd_kill (EV_A_ fd); 1181 fd_kill (EV_A_ fd);
596} 1182}
597 1183
598/* called on ENOMEM in select/poll to kill some fds and retry */ 1184/* called on ENOMEM in select/poll to kill some fds and retry */
599static void noinline 1185static void noinline ecb_cold
600fd_enomem (EV_P) 1186fd_enomem (EV_P)
601{ 1187{
602 int fd; 1188 int fd;
603 1189
604 for (fd = anfdmax; fd--; ) 1190 for (fd = anfdmax; fd--; )
605 if (anfds [fd].events) 1191 if (anfds [fd].events)
606 { 1192 {
607 fd_kill (EV_A_ fd); 1193 fd_kill (EV_A_ fd);
608 return; 1194 break;
609 } 1195 }
610} 1196}
611 1197
612/* usually called after fork if backend needs to re-arm all fds from scratch */ 1198/* usually called after fork if backend needs to re-arm all fds from scratch */
613static void noinline 1199static void noinline
… …
617 1203
618 for (fd = 0; fd < anfdmax; ++fd) 1204 for (fd = 0; fd < anfdmax; ++fd)
619 if (anfds [fd].events) 1205 if (anfds [fd].events)
620 { 1206 {
621 anfds [fd].events = 0; 1207 anfds [fd].events = 0;
622 fd_change (EV_A_ fd); 1208 anfds [fd].emask = 0;
1209 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
623 } 1210 }
624} 1211}
625 1212
626/*****************************************************************************/ 1213/* used to prepare libev internal fd's */
627 1214/* this is not fork-safe */
628void inline_speed 1215inline_speed void
629upheap (WT *heap, int k)
630{
631 WT w = heap [k];
632
633 while (k && heap [k >> 1]->at > w->at)
634 {
635 heap [k] = heap [k >> 1];
636 ((W)heap [k])->active = k + 1;
637 k >>= 1;
638 }
639
640 heap [k] = w;
641 ((W)heap [k])->active = k + 1;
642
643}
644
645void inline_speed
646downheap (WT *heap, int N, int k)
647{
648 WT w = heap [k];
649
650 while (k < (N >> 1))
651 {
652 int j = k << 1;
653
654 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
655 ++j;
656
657 if (w->at <= heap [j]->at)
658 break;
659
660 heap [k] = heap [j];
661 ((W)heap [k])->active = k + 1;
662 k = j;
663 }
664
665 heap [k] = w;
666 ((W)heap [k])->active = k + 1;
667}
668
669void inline_size
670adjustheap (WT *heap, int N, int k)
671{
672 upheap (heap, k);
673 downheap (heap, N, k);
674}
675
676/*****************************************************************************/
677
678typedef struct
679{
680 WL head;
681 sig_atomic_t volatile gotsig;
682} ANSIG;
683
684static ANSIG *signals;
685static int signalmax;
686
687static int sigpipe [2];
688static sig_atomic_t volatile gotsig;
689static ev_io sigev;
690
691void inline_size
692signals_init (ANSIG *base, int count)
693{
694 while (count--)
695 {
696 base->head = 0;
697 base->gotsig = 0;
698
699 ++base;
700 }
701}
702
703static void
704sighandler (int signum)
705{
706#if _WIN32
707 signal (signum, sighandler);
708#endif
709
710 signals [signum - 1].gotsig = 1;
711
712 if (!gotsig)
713 {
714 int old_errno = errno;
715 gotsig = 1;
716 write (sigpipe [1], &signum, 1);
717 errno = old_errno;
718 }
719}
720
721void noinline
722ev_feed_signal_event (EV_P_ int signum)
723{
724 WL w;
725
726#if EV_MULTIPLICITY
727 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
728#endif
729
730 --signum;
731
732 if (signum < 0 || signum >= signalmax)
733 return;
734
735 signals [signum].gotsig = 0;
736
737 for (w = signals [signum].head; w; w = w->next)
738 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
739}
740
741static void
742sigcb (EV_P_ ev_io *iow, int revents)
743{
744 int signum;
745
746 read (sigpipe [0], &revents, 1);
747 gotsig = 0;
748
749 for (signum = signalmax; signum--; )
750 if (signals [signum].gotsig)
751 ev_feed_signal_event (EV_A_ signum + 1);
752}
753
754void inline_size
755fd_intern (int fd) 1216fd_intern (int fd)
756{ 1217{
757#ifdef _WIN32 1218#ifdef _WIN32
758 int arg = 1; 1219 unsigned long arg = 1;
759 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1220 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
760#else 1221#else
761 fcntl (fd, F_SETFD, FD_CLOEXEC); 1222 fcntl (fd, F_SETFD, FD_CLOEXEC);
762 fcntl (fd, F_SETFL, O_NONBLOCK); 1223 fcntl (fd, F_SETFL, O_NONBLOCK);
763#endif 1224#endif
764} 1225}
765 1226
766static void noinline
767siginit (EV_P)
768{
769 fd_intern (sigpipe [0]);
770 fd_intern (sigpipe [1]);
771
772 ev_io_set (&sigev, sigpipe [0], EV_READ);
773 ev_io_start (EV_A_ &sigev);
774 ev_unref (EV_A); /* child watcher should not keep loop alive */
775}
776
777/*****************************************************************************/ 1227/*****************************************************************************/
778 1228
779static ev_child *childs [EV_PID_HASHSIZE]; 1229/*
1230 * the heap functions want a real array index. array index 0 is guaranteed to not
1231 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1232 * the branching factor of the d-tree.
1233 */
780 1234
1235/*
1236 * at the moment we allow libev the luxury of two heaps,
1237 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1238 * which is more cache-efficient.
1239 * the difference is about 5% with 50000+ watchers.
1240 */
1241#if EV_USE_4HEAP
1242
1243#define DHEAP 4
1244#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1245#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1246#define UPHEAP_DONE(p,k) ((p) == (k))
1247
1248/* away from the root */
1249inline_speed void
1250downheap (ANHE *heap, int N, int k)
1251{
1252 ANHE he = heap [k];
1253 ANHE *E = heap + N + HEAP0;
1254
1255 for (;;)
1256 {
1257 ev_tstamp minat;
1258 ANHE *minpos;
1259 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1260
1261 /* find minimum child */
1262 if (expect_true (pos + DHEAP - 1 < E))
1263 {
1264 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1265 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1266 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1267 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1268 }
1269 else if (pos < E)
1270 {
1271 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1272 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1273 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1274 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1275 }
1276 else
1277 break;
1278
1279 if (ANHE_at (he) <= minat)
1280 break;
1281
1282 heap [k] = *minpos;
1283 ev_active (ANHE_w (*minpos)) = k;
1284
1285 k = minpos - heap;
1286 }
1287
1288 heap [k] = he;
1289 ev_active (ANHE_w (he)) = k;
1290}
1291
1292#else /* 4HEAP */
1293
1294#define HEAP0 1
1295#define HPARENT(k) ((k) >> 1)
1296#define UPHEAP_DONE(p,k) (!(p))
1297
1298/* away from the root */
1299inline_speed void
1300downheap (ANHE *heap, int N, int k)
1301{
1302 ANHE he = heap [k];
1303
1304 for (;;)
1305 {
1306 int c = k << 1;
1307
1308 if (c >= N + HEAP0)
1309 break;
1310
1311 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1312 ? 1 : 0;
1313
1314 if (ANHE_at (he) <= ANHE_at (heap [c]))
1315 break;
1316
1317 heap [k] = heap [c];
1318 ev_active (ANHE_w (heap [k])) = k;
1319
1320 k = c;
1321 }
1322
1323 heap [k] = he;
1324 ev_active (ANHE_w (he)) = k;
1325}
1326#endif
1327
1328/* towards the root */
1329inline_speed void
1330upheap (ANHE *heap, int k)
1331{
1332 ANHE he = heap [k];
1333
1334 for (;;)
1335 {
1336 int p = HPARENT (k);
1337
1338 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1339 break;
1340
1341 heap [k] = heap [p];
1342 ev_active (ANHE_w (heap [k])) = k;
1343 k = p;
1344 }
1345
1346 heap [k] = he;
1347 ev_active (ANHE_w (he)) = k;
1348}
1349
1350/* move an element suitably so it is in a correct place */
1351inline_size void
1352adjustheap (ANHE *heap, int N, int k)
1353{
1354 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1355 upheap (heap, k);
1356 else
1357 downheap (heap, N, k);
1358}
1359
1360/* rebuild the heap: this function is used only once and executed rarely */
1361inline_size void
1362reheap (ANHE *heap, int N)
1363{
1364 int i;
1365
1366 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1367 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1368 for (i = 0; i < N; ++i)
1369 upheap (heap, i + HEAP0);
1370}
1371
1372/*****************************************************************************/
1373
1374/* associate signal watchers to a signal signal */
1375typedef struct
1376{
1377 EV_ATOMIC_T pending;
1378#if EV_MULTIPLICITY
1379 EV_P;
1380#endif
1381 WL head;
1382} ANSIG;
1383
1384static ANSIG signals [EV_NSIG - 1];
1385
1386/*****************************************************************************/
1387
1388#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1389
1390static void noinline ecb_cold
1391evpipe_init (EV_P)
1392{
1393 if (!ev_is_active (&pipe_w))
1394 {
1395# if EV_USE_EVENTFD
1396 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1397 if (evfd < 0 && errno == EINVAL)
1398 evfd = eventfd (0, 0);
1399
1400 if (evfd >= 0)
1401 {
1402 evpipe [0] = -1;
1403 fd_intern (evfd); /* doing it twice doesn't hurt */
1404 ev_io_set (&pipe_w, evfd, EV_READ);
1405 }
1406 else
1407# endif
1408 {
1409 while (pipe (evpipe))
1410 ev_syserr ("(libev) error creating signal/async pipe");
1411
1412 fd_intern (evpipe [0]);
1413 fd_intern (evpipe [1]);
1414 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1415 }
1416
1417 ev_io_start (EV_A_ &pipe_w);
1418 ev_unref (EV_A); /* watcher should not keep loop alive */
1419 }
1420}
1421
1422inline_speed void
1423evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1424{
1425 if (!*flag)
1426 {
1427 *flag = 1;
1428
1429 pipe_write_skipped = 1;
1430
1431 if (pipe_write_wanted)
1432 {
1433 int old_errno;
1434
1435 pipe_write_skipped = 0;
1436
1437 old_errno = errno; /* save errno because write will clobber it */
1438
1439#if EV_USE_EVENTFD
1440 if (evfd >= 0)
1441 {
1442 uint64_t counter = 1;
1443 write (evfd, &counter, sizeof (uint64_t));
1444 }
1445 else
1446#endif
1447 {
1448 /* win32 people keep sending patches that change this write() to send() */
1449 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1450 /* so when you think this write should be a send instead, please find out */
1451 /* where your send() is from - it's definitely not the microsoft send, and */
1452 /* tell me. thank you. */
1453 write (evpipe [1], &(evpipe [1]), 1);
1454 }
1455
1456 errno = old_errno;
1457 }
1458 }
1459}
1460
1461/* called whenever the libev signal pipe */
1462/* got some events (signal, async) */
1463static void
1464pipecb (EV_P_ ev_io *iow, int revents)
1465{
1466 int i;
1467
1468 if (revents & EV_READ)
1469 {
1470#if EV_USE_EVENTFD
1471 if (evfd >= 0)
1472 {
1473 uint64_t counter;
1474 read (evfd, &counter, sizeof (uint64_t));
1475 }
1476 else
1477#endif
1478 {
1479 char dummy;
1480 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1481 read (evpipe [0], &dummy, 1);
1482 }
1483 }
1484
1485 pipe_write_skipped = 0;
1486
1487#if EV_SIGNAL_ENABLE
1488 if (sig_pending)
1489 {
1490 sig_pending = 0;
1491
1492 for (i = EV_NSIG - 1; i--; )
1493 if (expect_false (signals [i].pending))
1494 ev_feed_signal_event (EV_A_ i + 1);
1495 }
1496#endif
1497
1498#if EV_ASYNC_ENABLE
1499 if (async_pending)
1500 {
1501 async_pending = 0;
1502
1503 for (i = asynccnt; i--; )
1504 if (asyncs [i]->sent)
1505 {
1506 asyncs [i]->sent = 0;
1507 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1508 }
1509 }
1510#endif
1511}
1512
1513/*****************************************************************************/
1514
1515void
1516ev_feed_signal (int signum)
1517{
1518#if EV_MULTIPLICITY
1519 EV_P = signals [signum - 1].loop;
1520
1521 if (!EV_A)
1522 return;
1523#endif
1524
1525 if (!ev_active (&pipe_w))
1526 return;
1527
1528 signals [signum - 1].pending = 1;
1529 evpipe_write (EV_A_ &sig_pending);
1530}
1531
1532static void
1533ev_sighandler (int signum)
1534{
781#ifndef _WIN32 1535#ifdef _WIN32
1536 signal (signum, ev_sighandler);
1537#endif
1538
1539 ev_feed_signal (signum);
1540}
1541
1542void noinline
1543ev_feed_signal_event (EV_P_ int signum)
1544{
1545 WL w;
1546
1547 if (expect_false (signum <= 0 || signum > EV_NSIG))
1548 return;
1549
1550 --signum;
1551
1552#if EV_MULTIPLICITY
1553 /* it is permissible to try to feed a signal to the wrong loop */
1554 /* or, likely more useful, feeding a signal nobody is waiting for */
1555
1556 if (expect_false (signals [signum].loop != EV_A))
1557 return;
1558#endif
1559
1560 signals [signum].pending = 0;
1561
1562 for (w = signals [signum].head; w; w = w->next)
1563 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1564}
1565
1566#if EV_USE_SIGNALFD
1567static void
1568sigfdcb (EV_P_ ev_io *iow, int revents)
1569{
1570 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1571
1572 for (;;)
1573 {
1574 ssize_t res = read (sigfd, si, sizeof (si));
1575
1576 /* not ISO-C, as res might be -1, but works with SuS */
1577 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1578 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1579
1580 if (res < (ssize_t)sizeof (si))
1581 break;
1582 }
1583}
1584#endif
1585
1586#endif
1587
1588/*****************************************************************************/
1589
1590#if EV_CHILD_ENABLE
1591static WL childs [EV_PID_HASHSIZE];
782 1592
783static ev_signal childev; 1593static ev_signal childev;
784 1594
785void inline_speed 1595#ifndef WIFCONTINUED
1596# define WIFCONTINUED(status) 0
1597#endif
1598
1599/* handle a single child status event */
1600inline_speed void
786child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1601child_reap (EV_P_ int chain, int pid, int status)
787{ 1602{
788 ev_child *w; 1603 ev_child *w;
1604 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
789 1605
790 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1606 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1607 {
791 if (w->pid == pid || !w->pid) 1608 if ((w->pid == pid || !w->pid)
1609 && (!traced || (w->flags & 1)))
792 { 1610 {
793 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1611 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
794 w->rpid = pid; 1612 w->rpid = pid;
795 w->rstatus = status; 1613 w->rstatus = status;
796 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1614 ev_feed_event (EV_A_ (W)w, EV_CHILD);
797 } 1615 }
1616 }
798} 1617}
799 1618
800#ifndef WCONTINUED 1619#ifndef WCONTINUED
801# define WCONTINUED 0 1620# define WCONTINUED 0
802#endif 1621#endif
803 1622
1623/* called on sigchld etc., calls waitpid */
804static void 1624static void
805childcb (EV_P_ ev_signal *sw, int revents) 1625childcb (EV_P_ ev_signal *sw, int revents)
806{ 1626{
807 int pid, status; 1627 int pid, status;
808 1628
… …
811 if (!WCONTINUED 1631 if (!WCONTINUED
812 || errno != EINVAL 1632 || errno != EINVAL
813 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1633 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
814 return; 1634 return;
815 1635
816 /* make sure we are called again until all childs have been reaped */ 1636 /* make sure we are called again until all children have been reaped */
817 /* we need to do it this way so that the callback gets called before we continue */ 1637 /* we need to do it this way so that the callback gets called before we continue */
818 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1638 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
819 1639
820 child_reap (EV_A_ sw, pid, pid, status); 1640 child_reap (EV_A_ pid, pid, status);
821 if (EV_PID_HASHSIZE > 1) 1641 if ((EV_PID_HASHSIZE) > 1)
822 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1642 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
823} 1643}
824 1644
825#endif 1645#endif
826 1646
827/*****************************************************************************/ 1647/*****************************************************************************/
828 1648
1649#if EV_USE_IOCP
1650# include "ev_iocp.c"
1651#endif
829#if EV_USE_PORT 1652#if EV_USE_PORT
830# include "ev_port.c" 1653# include "ev_port.c"
831#endif 1654#endif
832#if EV_USE_KQUEUE 1655#if EV_USE_KQUEUE
833# include "ev_kqueue.c" 1656# include "ev_kqueue.c"
… …
840#endif 1663#endif
841#if EV_USE_SELECT 1664#if EV_USE_SELECT
842# include "ev_select.c" 1665# include "ev_select.c"
843#endif 1666#endif
844 1667
845int 1668int ecb_cold
846ev_version_major (void) 1669ev_version_major (void)
847{ 1670{
848 return EV_VERSION_MAJOR; 1671 return EV_VERSION_MAJOR;
849} 1672}
850 1673
851int 1674int ecb_cold
852ev_version_minor (void) 1675ev_version_minor (void)
853{ 1676{
854 return EV_VERSION_MINOR; 1677 return EV_VERSION_MINOR;
855} 1678}
856 1679
857/* return true if we are running with elevated privileges and should ignore env variables */ 1680/* return true if we are running with elevated privileges and should ignore env variables */
858int inline_size 1681int inline_size ecb_cold
859enable_secure (void) 1682enable_secure (void)
860{ 1683{
861#ifdef _WIN32 1684#ifdef _WIN32
862 return 0; 1685 return 0;
863#else 1686#else
864 return getuid () != geteuid () 1687 return getuid () != geteuid ()
865 || getgid () != getegid (); 1688 || getgid () != getegid ();
866#endif 1689#endif
867} 1690}
868 1691
869unsigned int 1692unsigned int ecb_cold
870ev_supported_backends (void) 1693ev_supported_backends (void)
871{ 1694{
872 unsigned int flags = 0; 1695 unsigned int flags = 0;
873 1696
874 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1697 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
878 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1701 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
879 1702
880 return flags; 1703 return flags;
881} 1704}
882 1705
883unsigned int 1706unsigned int ecb_cold
884ev_recommended_backends (void) 1707ev_recommended_backends (void)
885{ 1708{
886 unsigned int flags = ev_supported_backends (); 1709 unsigned int flags = ev_supported_backends ();
887 1710
888#ifndef __NetBSD__ 1711#ifndef __NetBSD__
889 /* kqueue is borked on everything but netbsd apparently */ 1712 /* kqueue is borked on everything but netbsd apparently */
890 /* it usually doesn't work correctly on anything but sockets and pipes */ 1713 /* it usually doesn't work correctly on anything but sockets and pipes */
891 flags &= ~EVBACKEND_KQUEUE; 1714 flags &= ~EVBACKEND_KQUEUE;
892#endif 1715#endif
893#ifdef __APPLE__ 1716#ifdef __APPLE__
894 // flags &= ~EVBACKEND_KQUEUE; for documentation 1717 /* only select works correctly on that "unix-certified" platform */
895 flags &= ~EVBACKEND_POLL; 1718 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1719 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1720#endif
1721#ifdef __FreeBSD__
1722 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
896#endif 1723#endif
897 1724
898 return flags; 1725 return flags;
899} 1726}
900 1727
901unsigned int 1728unsigned int ecb_cold
902ev_embeddable_backends (void) 1729ev_embeddable_backends (void)
903{ 1730{
904 return EVBACKEND_EPOLL 1731 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
905 | EVBACKEND_KQUEUE 1732
906 | EVBACKEND_PORT; 1733 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1734 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1735 flags &= ~EVBACKEND_EPOLL;
1736
1737 return flags;
907} 1738}
908 1739
909unsigned int 1740unsigned int
910ev_backend (EV_P) 1741ev_backend (EV_P)
911{ 1742{
912 return backend; 1743 return backend;
913} 1744}
914 1745
1746#if EV_FEATURE_API
915unsigned int 1747unsigned int
916ev_loop_count (EV_P) 1748ev_iteration (EV_P)
917{ 1749{
918 return loop_count; 1750 return loop_count;
919} 1751}
920 1752
1753unsigned int
1754ev_depth (EV_P)
1755{
1756 return loop_depth;
1757}
1758
1759void
1760ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1761{
1762 io_blocktime = interval;
1763}
1764
1765void
1766ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1767{
1768 timeout_blocktime = interval;
1769}
1770
1771void
1772ev_set_userdata (EV_P_ void *data)
1773{
1774 userdata = data;
1775}
1776
1777void *
1778ev_userdata (EV_P)
1779{
1780 return userdata;
1781}
1782
1783void
1784ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1785{
1786 invoke_cb = invoke_pending_cb;
1787}
1788
1789void
1790ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1791{
1792 release_cb = release;
1793 acquire_cb = acquire;
1794}
1795#endif
1796
1797/* initialise a loop structure, must be zero-initialised */
921static void noinline 1798static void noinline ecb_cold
922loop_init (EV_P_ unsigned int flags) 1799loop_init (EV_P_ unsigned int flags)
923{ 1800{
924 if (!backend) 1801 if (!backend)
925 { 1802 {
1803 origflags = flags;
1804
1805#if EV_USE_REALTIME
1806 if (!have_realtime)
1807 {
1808 struct timespec ts;
1809
1810 if (!clock_gettime (CLOCK_REALTIME, &ts))
1811 have_realtime = 1;
1812 }
1813#endif
1814
926#if EV_USE_MONOTONIC 1815#if EV_USE_MONOTONIC
1816 if (!have_monotonic)
927 { 1817 {
928 struct timespec ts; 1818 struct timespec ts;
1819
929 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1820 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
930 have_monotonic = 1; 1821 have_monotonic = 1;
931 } 1822 }
932#endif 1823#endif
933
934 ev_rt_now = ev_time ();
935 mn_now = get_clock ();
936 now_floor = mn_now;
937 rtmn_diff = ev_rt_now - mn_now;
938 1824
939 /* pid check not overridable via env */ 1825 /* pid check not overridable via env */
940#ifndef _WIN32 1826#ifndef _WIN32
941 if (flags & EVFLAG_FORKCHECK) 1827 if (flags & EVFLAG_FORKCHECK)
942 curpid = getpid (); 1828 curpid = getpid ();
… …
945 if (!(flags & EVFLAG_NOENV) 1831 if (!(flags & EVFLAG_NOENV)
946 && !enable_secure () 1832 && !enable_secure ()
947 && getenv ("LIBEV_FLAGS")) 1833 && getenv ("LIBEV_FLAGS"))
948 flags = atoi (getenv ("LIBEV_FLAGS")); 1834 flags = atoi (getenv ("LIBEV_FLAGS"));
949 1835
950 if (!(flags & 0x0000ffffUL)) 1836 ev_rt_now = ev_time ();
1837 mn_now = get_clock ();
1838 now_floor = mn_now;
1839 rtmn_diff = ev_rt_now - mn_now;
1840#if EV_FEATURE_API
1841 invoke_cb = ev_invoke_pending;
1842#endif
1843
1844 io_blocktime = 0.;
1845 timeout_blocktime = 0.;
1846 backend = 0;
1847 backend_fd = -1;
1848 sig_pending = 0;
1849#if EV_ASYNC_ENABLE
1850 async_pending = 0;
1851#endif
1852 pipe_write_skipped = 0;
1853 pipe_write_wanted = 0;
1854#if EV_USE_INOTIFY
1855 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1856#endif
1857#if EV_USE_SIGNALFD
1858 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1859#endif
1860
1861 if (!(flags & EVBACKEND_MASK))
951 flags |= ev_recommended_backends (); 1862 flags |= ev_recommended_backends ();
952 1863
953 backend = 0;
954 backend_fd = -1;
955#if EV_USE_INOTIFY 1864#if EV_USE_IOCP
956 fs_fd = -2; 1865 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
957#endif 1866#endif
958
959#if EV_USE_PORT 1867#if EV_USE_PORT
960 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1868 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
961#endif 1869#endif
962#if EV_USE_KQUEUE 1870#if EV_USE_KQUEUE
963 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1871 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
970#endif 1878#endif
971#if EV_USE_SELECT 1879#if EV_USE_SELECT
972 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1880 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
973#endif 1881#endif
974 1882
1883 ev_prepare_init (&pending_w, pendingcb);
1884
1885#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
975 ev_init (&sigev, sigcb); 1886 ev_init (&pipe_w, pipecb);
976 ev_set_priority (&sigev, EV_MAXPRI); 1887 ev_set_priority (&pipe_w, EV_MAXPRI);
1888#endif
977 } 1889 }
978} 1890}
979 1891
980static void noinline 1892/* free up a loop structure */
1893void ecb_cold
981loop_destroy (EV_P) 1894ev_loop_destroy (EV_P)
982{ 1895{
983 int i; 1896 int i;
1897
1898#if EV_MULTIPLICITY
1899 /* mimic free (0) */
1900 if (!EV_A)
1901 return;
1902#endif
1903
1904#if EV_CLEANUP_ENABLE
1905 /* queue cleanup watchers (and execute them) */
1906 if (expect_false (cleanupcnt))
1907 {
1908 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1909 EV_INVOKE_PENDING;
1910 }
1911#endif
1912
1913#if EV_CHILD_ENABLE
1914 if (ev_is_active (&childev))
1915 {
1916 ev_ref (EV_A); /* child watcher */
1917 ev_signal_stop (EV_A_ &childev);
1918 }
1919#endif
1920
1921 if (ev_is_active (&pipe_w))
1922 {
1923 /*ev_ref (EV_A);*/
1924 /*ev_io_stop (EV_A_ &pipe_w);*/
1925
1926#if EV_USE_EVENTFD
1927 if (evfd >= 0)
1928 close (evfd);
1929#endif
1930
1931 if (evpipe [0] >= 0)
1932 {
1933 EV_WIN32_CLOSE_FD (evpipe [0]);
1934 EV_WIN32_CLOSE_FD (evpipe [1]);
1935 }
1936 }
1937
1938#if EV_USE_SIGNALFD
1939 if (ev_is_active (&sigfd_w))
1940 close (sigfd);
1941#endif
984 1942
985#if EV_USE_INOTIFY 1943#if EV_USE_INOTIFY
986 if (fs_fd >= 0) 1944 if (fs_fd >= 0)
987 close (fs_fd); 1945 close (fs_fd);
988#endif 1946#endif
989 1947
990 if (backend_fd >= 0) 1948 if (backend_fd >= 0)
991 close (backend_fd); 1949 close (backend_fd);
992 1950
1951#if EV_USE_IOCP
1952 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1953#endif
993#if EV_USE_PORT 1954#if EV_USE_PORT
994 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1955 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
995#endif 1956#endif
996#if EV_USE_KQUEUE 1957#if EV_USE_KQUEUE
997 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1958 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1012#if EV_IDLE_ENABLE 1973#if EV_IDLE_ENABLE
1013 array_free (idle, [i]); 1974 array_free (idle, [i]);
1014#endif 1975#endif
1015 } 1976 }
1016 1977
1978 ev_free (anfds); anfds = 0; anfdmax = 0;
1979
1017 /* have to use the microsoft-never-gets-it-right macro */ 1980 /* have to use the microsoft-never-gets-it-right macro */
1981 array_free (rfeed, EMPTY);
1018 array_free (fdchange, EMPTY); 1982 array_free (fdchange, EMPTY);
1019 array_free (timer, EMPTY); 1983 array_free (timer, EMPTY);
1020#if EV_PERIODIC_ENABLE 1984#if EV_PERIODIC_ENABLE
1021 array_free (periodic, EMPTY); 1985 array_free (periodic, EMPTY);
1022#endif 1986#endif
1987#if EV_FORK_ENABLE
1988 array_free (fork, EMPTY);
1989#endif
1990#if EV_CLEANUP_ENABLE
1991 array_free (cleanup, EMPTY);
1992#endif
1023 array_free (prepare, EMPTY); 1993 array_free (prepare, EMPTY);
1024 array_free (check, EMPTY); 1994 array_free (check, EMPTY);
1995#if EV_ASYNC_ENABLE
1996 array_free (async, EMPTY);
1997#endif
1025 1998
1026 backend = 0; 1999 backend = 0;
1027}
1028 2000
2001#if EV_MULTIPLICITY
2002 if (ev_is_default_loop (EV_A))
2003#endif
2004 ev_default_loop_ptr = 0;
2005#if EV_MULTIPLICITY
2006 else
2007 ev_free (EV_A);
2008#endif
2009}
2010
2011#if EV_USE_INOTIFY
1029void inline_size infy_fork (EV_P); 2012inline_size void infy_fork (EV_P);
2013#endif
1030 2014
1031void inline_size 2015inline_size void
1032loop_fork (EV_P) 2016loop_fork (EV_P)
1033{ 2017{
1034#if EV_USE_PORT 2018#if EV_USE_PORT
1035 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2019 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1036#endif 2020#endif
… …
1042#endif 2026#endif
1043#if EV_USE_INOTIFY 2027#if EV_USE_INOTIFY
1044 infy_fork (EV_A); 2028 infy_fork (EV_A);
1045#endif 2029#endif
1046 2030
1047 if (ev_is_active (&sigev)) 2031 if (ev_is_active (&pipe_w))
1048 { 2032 {
1049 /* default loop */ 2033 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1050 2034
1051 ev_ref (EV_A); 2035 ev_ref (EV_A);
1052 ev_io_stop (EV_A_ &sigev); 2036 ev_io_stop (EV_A_ &pipe_w);
1053 close (sigpipe [0]);
1054 close (sigpipe [1]);
1055 2037
1056 while (pipe (sigpipe)) 2038#if EV_USE_EVENTFD
1057 syserr ("(libev) error creating pipe"); 2039 if (evfd >= 0)
2040 close (evfd);
2041#endif
1058 2042
2043 if (evpipe [0] >= 0)
2044 {
2045 EV_WIN32_CLOSE_FD (evpipe [0]);
2046 EV_WIN32_CLOSE_FD (evpipe [1]);
2047 }
2048
2049#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1059 siginit (EV_A); 2050 evpipe_init (EV_A);
2051 /* now iterate over everything, in case we missed something */
2052 pipecb (EV_A_ &pipe_w, EV_READ);
2053#endif
1060 } 2054 }
1061 2055
1062 postfork = 0; 2056 postfork = 0;
1063} 2057}
1064 2058
1065#if EV_MULTIPLICITY 2059#if EV_MULTIPLICITY
2060
1066struct ev_loop * 2061struct ev_loop * ecb_cold
1067ev_loop_new (unsigned int flags) 2062ev_loop_new (unsigned int flags)
1068{ 2063{
1069 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2064 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1070 2065
1071 memset (loop, 0, sizeof (struct ev_loop)); 2066 memset (EV_A, 0, sizeof (struct ev_loop));
1072
1073 loop_init (EV_A_ flags); 2067 loop_init (EV_A_ flags);
1074 2068
1075 if (ev_backend (EV_A)) 2069 if (ev_backend (EV_A))
1076 return loop; 2070 return EV_A;
1077 2071
2072 ev_free (EV_A);
1078 return 0; 2073 return 0;
1079} 2074}
1080 2075
1081void 2076#endif /* multiplicity */
1082ev_loop_destroy (EV_P)
1083{
1084 loop_destroy (EV_A);
1085 ev_free (loop);
1086}
1087 2077
1088void 2078#if EV_VERIFY
1089ev_loop_fork (EV_P) 2079static void noinline ecb_cold
2080verify_watcher (EV_P_ W w)
1090{ 2081{
1091 postfork = 1; 2082 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1092}
1093 2083
2084 if (w->pending)
2085 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2086}
2087
2088static void noinline ecb_cold
2089verify_heap (EV_P_ ANHE *heap, int N)
2090{
2091 int i;
2092
2093 for (i = HEAP0; i < N + HEAP0; ++i)
2094 {
2095 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2096 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2097 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2098
2099 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2100 }
2101}
2102
2103static void noinline ecb_cold
2104array_verify (EV_P_ W *ws, int cnt)
2105{
2106 while (cnt--)
2107 {
2108 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2109 verify_watcher (EV_A_ ws [cnt]);
2110 }
2111}
2112#endif
2113
2114#if EV_FEATURE_API
2115void ecb_cold
2116ev_verify (EV_P)
2117{
2118#if EV_VERIFY
2119 int i;
2120 WL w;
2121
2122 assert (activecnt >= -1);
2123
2124 assert (fdchangemax >= fdchangecnt);
2125 for (i = 0; i < fdchangecnt; ++i)
2126 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2127
2128 assert (anfdmax >= 0);
2129 for (i = 0; i < anfdmax; ++i)
2130 for (w = anfds [i].head; w; w = w->next)
2131 {
2132 verify_watcher (EV_A_ (W)w);
2133 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2134 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2135 }
2136
2137 assert (timermax >= timercnt);
2138 verify_heap (EV_A_ timers, timercnt);
2139
2140#if EV_PERIODIC_ENABLE
2141 assert (periodicmax >= periodiccnt);
2142 verify_heap (EV_A_ periodics, periodiccnt);
2143#endif
2144
2145 for (i = NUMPRI; i--; )
2146 {
2147 assert (pendingmax [i] >= pendingcnt [i]);
2148#if EV_IDLE_ENABLE
2149 assert (idleall >= 0);
2150 assert (idlemax [i] >= idlecnt [i]);
2151 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2152#endif
2153 }
2154
2155#if EV_FORK_ENABLE
2156 assert (forkmax >= forkcnt);
2157 array_verify (EV_A_ (W *)forks, forkcnt);
2158#endif
2159
2160#if EV_CLEANUP_ENABLE
2161 assert (cleanupmax >= cleanupcnt);
2162 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2163#endif
2164
2165#if EV_ASYNC_ENABLE
2166 assert (asyncmax >= asynccnt);
2167 array_verify (EV_A_ (W *)asyncs, asynccnt);
2168#endif
2169
2170#if EV_PREPARE_ENABLE
2171 assert (preparemax >= preparecnt);
2172 array_verify (EV_A_ (W *)prepares, preparecnt);
2173#endif
2174
2175#if EV_CHECK_ENABLE
2176 assert (checkmax >= checkcnt);
2177 array_verify (EV_A_ (W *)checks, checkcnt);
2178#endif
2179
2180# if 0
2181#if EV_CHILD_ENABLE
2182 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2183 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2184#endif
2185# endif
2186#endif
2187}
1094#endif 2188#endif
1095 2189
1096#if EV_MULTIPLICITY 2190#if EV_MULTIPLICITY
1097struct ev_loop * 2191struct ev_loop * ecb_cold
1098ev_default_loop_init (unsigned int flags)
1099#else 2192#else
1100int 2193int
2194#endif
1101ev_default_loop (unsigned int flags) 2195ev_default_loop (unsigned int flags)
1102#endif
1103{ 2196{
1104 if (sigpipe [0] == sigpipe [1])
1105 if (pipe (sigpipe))
1106 return 0;
1107
1108 if (!ev_default_loop_ptr) 2197 if (!ev_default_loop_ptr)
1109 { 2198 {
1110#if EV_MULTIPLICITY 2199#if EV_MULTIPLICITY
1111 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2200 EV_P = ev_default_loop_ptr = &default_loop_struct;
1112#else 2201#else
1113 ev_default_loop_ptr = 1; 2202 ev_default_loop_ptr = 1;
1114#endif 2203#endif
1115 2204
1116 loop_init (EV_A_ flags); 2205 loop_init (EV_A_ flags);
1117 2206
1118 if (ev_backend (EV_A)) 2207 if (ev_backend (EV_A))
1119 { 2208 {
1120 siginit (EV_A); 2209#if EV_CHILD_ENABLE
1121
1122#ifndef _WIN32
1123 ev_signal_init (&childev, childcb, SIGCHLD); 2210 ev_signal_init (&childev, childcb, SIGCHLD);
1124 ev_set_priority (&childev, EV_MAXPRI); 2211 ev_set_priority (&childev, EV_MAXPRI);
1125 ev_signal_start (EV_A_ &childev); 2212 ev_signal_start (EV_A_ &childev);
1126 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2213 ev_unref (EV_A); /* child watcher should not keep loop alive */
1127#endif 2214#endif
… …
1132 2219
1133 return ev_default_loop_ptr; 2220 return ev_default_loop_ptr;
1134} 2221}
1135 2222
1136void 2223void
1137ev_default_destroy (void) 2224ev_loop_fork (EV_P)
1138{ 2225{
1139#if EV_MULTIPLICITY 2226 postfork = 1; /* must be in line with ev_default_fork */
1140 struct ev_loop *loop = ev_default_loop_ptr;
1141#endif
1142
1143#ifndef _WIN32
1144 ev_ref (EV_A); /* child watcher */
1145 ev_signal_stop (EV_A_ &childev);
1146#endif
1147
1148 ev_ref (EV_A); /* signal watcher */
1149 ev_io_stop (EV_A_ &sigev);
1150
1151 close (sigpipe [0]); sigpipe [0] = 0;
1152 close (sigpipe [1]); sigpipe [1] = 0;
1153
1154 loop_destroy (EV_A);
1155}
1156
1157void
1158ev_default_fork (void)
1159{
1160#if EV_MULTIPLICITY
1161 struct ev_loop *loop = ev_default_loop_ptr;
1162#endif
1163
1164 if (backend)
1165 postfork = 1;
1166} 2227}
1167 2228
1168/*****************************************************************************/ 2229/*****************************************************************************/
1169 2230
1170void 2231void
1171ev_invoke (EV_P_ void *w, int revents) 2232ev_invoke (EV_P_ void *w, int revents)
1172{ 2233{
1173 EV_CB_INVOKE ((W)w, revents); 2234 EV_CB_INVOKE ((W)w, revents);
1174} 2235}
1175 2236
1176void inline_speed 2237unsigned int
1177call_pending (EV_P) 2238ev_pending_count (EV_P)
2239{
2240 int pri;
2241 unsigned int count = 0;
2242
2243 for (pri = NUMPRI; pri--; )
2244 count += pendingcnt [pri];
2245
2246 return count;
2247}
2248
2249void noinline
2250ev_invoke_pending (EV_P)
1178{ 2251{
1179 int pri; 2252 int pri;
1180 2253
1181 for (pri = NUMPRI; pri--; ) 2254 for (pri = NUMPRI; pri--; )
1182 while (pendingcnt [pri]) 2255 while (pendingcnt [pri])
1183 { 2256 {
1184 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2257 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1185 2258
1186 if (expect_true (p->w))
1187 {
1188 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1189
1190 p->w->pending = 0; 2259 p->w->pending = 0;
1191 EV_CB_INVOKE (p->w, p->events); 2260 EV_CB_INVOKE (p->w, p->events);
1192 } 2261 EV_FREQUENT_CHECK;
1193 } 2262 }
1194} 2263}
1195 2264
1196void inline_size
1197timers_reify (EV_P)
1198{
1199 while (timercnt && ((WT)timers [0])->at <= mn_now)
1200 {
1201 ev_timer *w = timers [0];
1202
1203 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1204
1205 /* first reschedule or stop timer */
1206 if (w->repeat)
1207 {
1208 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1209
1210 ((WT)w)->at += w->repeat;
1211 if (((WT)w)->at < mn_now)
1212 ((WT)w)->at = mn_now;
1213
1214 downheap ((WT *)timers, timercnt, 0);
1215 }
1216 else
1217 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1218
1219 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1220 }
1221}
1222
1223#if EV_PERIODIC_ENABLE
1224void inline_size
1225periodics_reify (EV_P)
1226{
1227 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1228 {
1229 ev_periodic *w = periodics [0];
1230
1231 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1232
1233 /* first reschedule or stop timer */
1234 if (w->reschedule_cb)
1235 {
1236 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1237 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1238 downheap ((WT *)periodics, periodiccnt, 0);
1239 }
1240 else if (w->interval)
1241 {
1242 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1243 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1244 downheap ((WT *)periodics, periodiccnt, 0);
1245 }
1246 else
1247 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1248
1249 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1250 }
1251}
1252
1253static void noinline
1254periodics_reschedule (EV_P)
1255{
1256 int i;
1257
1258 /* adjust periodics after time jump */
1259 for (i = 0; i < periodiccnt; ++i)
1260 {
1261 ev_periodic *w = periodics [i];
1262
1263 if (w->reschedule_cb)
1264 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1265 else if (w->interval)
1266 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1267 }
1268
1269 /* now rebuild the heap */
1270 for (i = periodiccnt >> 1; i--; )
1271 downheap ((WT *)periodics, periodiccnt, i);
1272}
1273#endif
1274
1275#if EV_IDLE_ENABLE 2265#if EV_IDLE_ENABLE
1276void inline_size 2266/* make idle watchers pending. this handles the "call-idle */
2267/* only when higher priorities are idle" logic */
2268inline_size void
1277idle_reify (EV_P) 2269idle_reify (EV_P)
1278{ 2270{
1279 if (expect_false (idleall)) 2271 if (expect_false (idleall))
1280 { 2272 {
1281 int pri; 2273 int pri;
… …
1293 } 2285 }
1294 } 2286 }
1295} 2287}
1296#endif 2288#endif
1297 2289
1298int inline_size 2290/* make timers pending */
1299time_update_monotonic (EV_P) 2291inline_size void
2292timers_reify (EV_P)
1300{ 2293{
2294 EV_FREQUENT_CHECK;
2295
2296 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2297 {
2298 do
2299 {
2300 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2301
2302 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2303
2304 /* first reschedule or stop timer */
2305 if (w->repeat)
2306 {
2307 ev_at (w) += w->repeat;
2308 if (ev_at (w) < mn_now)
2309 ev_at (w) = mn_now;
2310
2311 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2312
2313 ANHE_at_cache (timers [HEAP0]);
2314 downheap (timers, timercnt, HEAP0);
2315 }
2316 else
2317 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2318
2319 EV_FREQUENT_CHECK;
2320 feed_reverse (EV_A_ (W)w);
2321 }
2322 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2323
2324 feed_reverse_done (EV_A_ EV_TIMER);
2325 }
2326}
2327
2328#if EV_PERIODIC_ENABLE
2329
2330static void noinline
2331periodic_recalc (EV_P_ ev_periodic *w)
2332{
2333 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2334 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2335
2336 /* the above almost always errs on the low side */
2337 while (at <= ev_rt_now)
2338 {
2339 ev_tstamp nat = at + w->interval;
2340
2341 /* when resolution fails us, we use ev_rt_now */
2342 if (expect_false (nat == at))
2343 {
2344 at = ev_rt_now;
2345 break;
2346 }
2347
2348 at = nat;
2349 }
2350
2351 ev_at (w) = at;
2352}
2353
2354/* make periodics pending */
2355inline_size void
2356periodics_reify (EV_P)
2357{
2358 EV_FREQUENT_CHECK;
2359
2360 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2361 {
2362 int feed_count = 0;
2363
2364 do
2365 {
2366 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2367
2368 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2369
2370 /* first reschedule or stop timer */
2371 if (w->reschedule_cb)
2372 {
2373 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2374
2375 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2376
2377 ANHE_at_cache (periodics [HEAP0]);
2378 downheap (periodics, periodiccnt, HEAP0);
2379 }
2380 else if (w->interval)
2381 {
2382 periodic_recalc (EV_A_ w);
2383 ANHE_at_cache (periodics [HEAP0]);
2384 downheap (periodics, periodiccnt, HEAP0);
2385 }
2386 else
2387 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2388
2389 EV_FREQUENT_CHECK;
2390 feed_reverse (EV_A_ (W)w);
2391 }
2392 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2393
2394 feed_reverse_done (EV_A_ EV_PERIODIC);
2395 }
2396}
2397
2398/* simply recalculate all periodics */
2399/* TODO: maybe ensure that at least one event happens when jumping forward? */
2400static void noinline ecb_cold
2401periodics_reschedule (EV_P)
2402{
2403 int i;
2404
2405 /* adjust periodics after time jump */
2406 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2407 {
2408 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2409
2410 if (w->reschedule_cb)
2411 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2412 else if (w->interval)
2413 periodic_recalc (EV_A_ w);
2414
2415 ANHE_at_cache (periodics [i]);
2416 }
2417
2418 reheap (periodics, periodiccnt);
2419}
2420#endif
2421
2422/* adjust all timers by a given offset */
2423static void noinline ecb_cold
2424timers_reschedule (EV_P_ ev_tstamp adjust)
2425{
2426 int i;
2427
2428 for (i = 0; i < timercnt; ++i)
2429 {
2430 ANHE *he = timers + i + HEAP0;
2431 ANHE_w (*he)->at += adjust;
2432 ANHE_at_cache (*he);
2433 }
2434}
2435
2436/* fetch new monotonic and realtime times from the kernel */
2437/* also detect if there was a timejump, and act accordingly */
2438inline_speed void
2439time_update (EV_P_ ev_tstamp max_block)
2440{
2441#if EV_USE_MONOTONIC
2442 if (expect_true (have_monotonic))
2443 {
2444 int i;
2445 ev_tstamp odiff = rtmn_diff;
2446
1301 mn_now = get_clock (); 2447 mn_now = get_clock ();
1302 2448
2449 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2450 /* interpolate in the meantime */
1303 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2451 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1304 { 2452 {
1305 ev_rt_now = rtmn_diff + mn_now; 2453 ev_rt_now = rtmn_diff + mn_now;
1306 return 0; 2454 return;
1307 } 2455 }
1308 else 2456
1309 {
1310 now_floor = mn_now; 2457 now_floor = mn_now;
1311 ev_rt_now = ev_time (); 2458 ev_rt_now = ev_time ();
1312 return 1;
1313 }
1314}
1315 2459
1316void inline_size 2460 /* loop a few times, before making important decisions.
1317time_update (EV_P) 2461 * on the choice of "4": one iteration isn't enough,
1318{ 2462 * in case we get preempted during the calls to
1319 int i; 2463 * ev_time and get_clock. a second call is almost guaranteed
1320 2464 * to succeed in that case, though. and looping a few more times
1321#if EV_USE_MONOTONIC 2465 * doesn't hurt either as we only do this on time-jumps or
1322 if (expect_true (have_monotonic)) 2466 * in the unlikely event of having been preempted here.
1323 { 2467 */
1324 if (time_update_monotonic (EV_A)) 2468 for (i = 4; --i; )
1325 { 2469 {
1326 ev_tstamp odiff = rtmn_diff; 2470 ev_tstamp diff;
1327
1328 /* loop a few times, before making important decisions.
1329 * on the choice of "4": one iteration isn't enough,
1330 * in case we get preempted during the calls to
1331 * ev_time and get_clock. a second call is almost guaranteed
1332 * to succeed in that case, though. and looping a few more times
1333 * doesn't hurt either as we only do this on time-jumps or
1334 * in the unlikely event of having been preempted here.
1335 */
1336 for (i = 4; --i; )
1337 {
1338 rtmn_diff = ev_rt_now - mn_now; 2471 rtmn_diff = ev_rt_now - mn_now;
1339 2472
1340 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2473 diff = odiff - rtmn_diff;
2474
2475 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1341 return; /* all is well */ 2476 return; /* all is well */
1342 2477
1343 ev_rt_now = ev_time (); 2478 ev_rt_now = ev_time ();
1344 mn_now = get_clock (); 2479 mn_now = get_clock ();
1345 now_floor = mn_now; 2480 now_floor = mn_now;
1346 } 2481 }
1347 2482
2483 /* no timer adjustment, as the monotonic clock doesn't jump */
2484 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1348# if EV_PERIODIC_ENABLE 2485# if EV_PERIODIC_ENABLE
1349 periodics_reschedule (EV_A); 2486 periodics_reschedule (EV_A);
1350# endif 2487# endif
1351 /* no timer adjustment, as the monotonic clock doesn't jump */
1352 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1353 }
1354 } 2488 }
1355 else 2489 else
1356#endif 2490#endif
1357 { 2491 {
1358 ev_rt_now = ev_time (); 2492 ev_rt_now = ev_time ();
1359 2493
1360 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2494 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1361 { 2495 {
2496 /* adjust timers. this is easy, as the offset is the same for all of them */
2497 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1362#if EV_PERIODIC_ENABLE 2498#if EV_PERIODIC_ENABLE
1363 periodics_reschedule (EV_A); 2499 periodics_reschedule (EV_A);
1364#endif 2500#endif
1365
1366 /* adjust timers. this is easy, as the offset is the same for all of them */
1367 for (i = 0; i < timercnt; ++i)
1368 ((WT)timers [i])->at += ev_rt_now - mn_now;
1369 } 2501 }
1370 2502
1371 mn_now = ev_rt_now; 2503 mn_now = ev_rt_now;
1372 } 2504 }
1373} 2505}
1374 2506
1375void 2507void
1376ev_ref (EV_P)
1377{
1378 ++activecnt;
1379}
1380
1381void
1382ev_unref (EV_P)
1383{
1384 --activecnt;
1385}
1386
1387static int loop_done;
1388
1389void
1390ev_loop (EV_P_ int flags) 2508ev_run (EV_P_ int flags)
1391{ 2509{
1392 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2510#if EV_FEATURE_API
1393 ? EVUNLOOP_ONE 2511 ++loop_depth;
1394 : EVUNLOOP_CANCEL; 2512#endif
1395 2513
2514 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2515
2516 loop_done = EVBREAK_CANCEL;
2517
1396 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2518 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1397 2519
1398 do 2520 do
1399 { 2521 {
2522#if EV_VERIFY >= 2
2523 ev_verify (EV_A);
2524#endif
2525
1400#ifndef _WIN32 2526#ifndef _WIN32
1401 if (expect_false (curpid)) /* penalise the forking check even more */ 2527 if (expect_false (curpid)) /* penalise the forking check even more */
1402 if (expect_false (getpid () != curpid)) 2528 if (expect_false (getpid () != curpid))
1403 { 2529 {
1404 curpid = getpid (); 2530 curpid = getpid ();
… …
1410 /* we might have forked, so queue fork handlers */ 2536 /* we might have forked, so queue fork handlers */
1411 if (expect_false (postfork)) 2537 if (expect_false (postfork))
1412 if (forkcnt) 2538 if (forkcnt)
1413 { 2539 {
1414 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2540 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1415 call_pending (EV_A); 2541 EV_INVOKE_PENDING;
1416 } 2542 }
1417#endif 2543#endif
1418 2544
2545#if EV_PREPARE_ENABLE
1419 /* queue check watchers (and execute them) */ 2546 /* queue prepare watchers (and execute them) */
1420 if (expect_false (preparecnt)) 2547 if (expect_false (preparecnt))
1421 { 2548 {
1422 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2549 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1423 call_pending (EV_A); 2550 EV_INVOKE_PENDING;
1424 } 2551 }
2552#endif
1425 2553
1426 if (expect_false (!activecnt)) 2554 if (expect_false (loop_done))
1427 break; 2555 break;
1428 2556
1429 /* we might have forked, so reify kernel state if necessary */ 2557 /* we might have forked, so reify kernel state if necessary */
1430 if (expect_false (postfork)) 2558 if (expect_false (postfork))
1431 loop_fork (EV_A); 2559 loop_fork (EV_A);
… …
1433 /* update fd-related kernel structures */ 2561 /* update fd-related kernel structures */
1434 fd_reify (EV_A); 2562 fd_reify (EV_A);
1435 2563
1436 /* calculate blocking time */ 2564 /* calculate blocking time */
1437 { 2565 {
1438 ev_tstamp block; 2566 ev_tstamp waittime = 0.;
2567 ev_tstamp sleeptime = 0.;
1439 2568
1440 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2569 /* remember old timestamp for io_blocktime calculation */
1441 block = 0.; /* do not block at all */ 2570 ev_tstamp prev_mn_now = mn_now;
1442 else 2571
2572 /* update time to cancel out callback processing overhead */
2573 time_update (EV_A_ 1e100);
2574
2575 /* from now on, we want a pipe-wake-up */
2576 pipe_write_wanted = 1;
2577
2578 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1443 { 2579 {
1444 /* update time to cancel out callback processing overhead */
1445#if EV_USE_MONOTONIC
1446 if (expect_true (have_monotonic))
1447 time_update_monotonic (EV_A);
1448 else
1449#endif
1450 {
1451 ev_rt_now = ev_time ();
1452 mn_now = ev_rt_now;
1453 }
1454
1455 block = MAX_BLOCKTIME; 2580 waittime = MAX_BLOCKTIME;
1456 2581
1457 if (timercnt) 2582 if (timercnt)
1458 { 2583 {
1459 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2584 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1460 if (block > to) block = to; 2585 if (waittime > to) waittime = to;
1461 } 2586 }
1462 2587
1463#if EV_PERIODIC_ENABLE 2588#if EV_PERIODIC_ENABLE
1464 if (periodiccnt) 2589 if (periodiccnt)
1465 { 2590 {
1466 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2591 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1467 if (block > to) block = to; 2592 if (waittime > to) waittime = to;
1468 } 2593 }
1469#endif 2594#endif
1470 2595
2596 /* don't let timeouts decrease the waittime below timeout_blocktime */
2597 if (expect_false (waittime < timeout_blocktime))
2598 waittime = timeout_blocktime;
2599
2600 /* at this point, we NEED to wait, so we have to ensure */
2601 /* to pass a minimum nonzero value to the backend */
2602 if (expect_false (waittime < backend_mintime))
2603 waittime = backend_mintime;
2604
2605 /* extra check because io_blocktime is commonly 0 */
1471 if (expect_false (block < 0.)) block = 0.; 2606 if (expect_false (io_blocktime))
2607 {
2608 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2609
2610 if (sleeptime > waittime - backend_mintime)
2611 sleeptime = waittime - backend_mintime;
2612
2613 if (expect_true (sleeptime > 0.))
2614 {
2615 ev_sleep (sleeptime);
2616 waittime -= sleeptime;
2617 }
2618 }
1472 } 2619 }
1473 2620
2621#if EV_FEATURE_API
1474 ++loop_count; 2622 ++loop_count;
2623#endif
2624 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1475 backend_poll (EV_A_ block); 2625 backend_poll (EV_A_ waittime);
2626 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2627
2628 pipe_write_wanted = 0;
2629
2630 if (pipe_write_skipped)
2631 {
2632 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2633 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2634 }
2635
2636
2637 /* update ev_rt_now, do magic */
2638 time_update (EV_A_ waittime + sleeptime);
1476 } 2639 }
1477
1478 /* update ev_rt_now, do magic */
1479 time_update (EV_A);
1480 2640
1481 /* queue pending timers and reschedule them */ 2641 /* queue pending timers and reschedule them */
1482 timers_reify (EV_A); /* relative timers called last */ 2642 timers_reify (EV_A); /* relative timers called last */
1483#if EV_PERIODIC_ENABLE 2643#if EV_PERIODIC_ENABLE
1484 periodics_reify (EV_A); /* absolute timers called first */ 2644 periodics_reify (EV_A); /* absolute timers called first */
… …
1487#if EV_IDLE_ENABLE 2647#if EV_IDLE_ENABLE
1488 /* queue idle watchers unless other events are pending */ 2648 /* queue idle watchers unless other events are pending */
1489 idle_reify (EV_A); 2649 idle_reify (EV_A);
1490#endif 2650#endif
1491 2651
2652#if EV_CHECK_ENABLE
1492 /* queue check watchers, to be executed first */ 2653 /* queue check watchers, to be executed first */
1493 if (expect_false (checkcnt)) 2654 if (expect_false (checkcnt))
1494 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2655 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2656#endif
1495 2657
1496 call_pending (EV_A); 2658 EV_INVOKE_PENDING;
1497
1498 } 2659 }
1499 while (expect_true (activecnt && !loop_done)); 2660 while (expect_true (
2661 activecnt
2662 && !loop_done
2663 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2664 ));
1500 2665
1501 if (loop_done == EVUNLOOP_ONE) 2666 if (loop_done == EVBREAK_ONE)
1502 loop_done = EVUNLOOP_CANCEL; 2667 loop_done = EVBREAK_CANCEL;
2668
2669#if EV_FEATURE_API
2670 --loop_depth;
2671#endif
1503} 2672}
1504 2673
1505void 2674void
1506ev_unloop (EV_P_ int how) 2675ev_break (EV_P_ int how)
1507{ 2676{
1508 loop_done = how; 2677 loop_done = how;
1509} 2678}
1510 2679
2680void
2681ev_ref (EV_P)
2682{
2683 ++activecnt;
2684}
2685
2686void
2687ev_unref (EV_P)
2688{
2689 --activecnt;
2690}
2691
2692void
2693ev_now_update (EV_P)
2694{
2695 time_update (EV_A_ 1e100);
2696}
2697
2698void
2699ev_suspend (EV_P)
2700{
2701 ev_now_update (EV_A);
2702}
2703
2704void
2705ev_resume (EV_P)
2706{
2707 ev_tstamp mn_prev = mn_now;
2708
2709 ev_now_update (EV_A);
2710 timers_reschedule (EV_A_ mn_now - mn_prev);
2711#if EV_PERIODIC_ENABLE
2712 /* TODO: really do this? */
2713 periodics_reschedule (EV_A);
2714#endif
2715}
2716
1511/*****************************************************************************/ 2717/*****************************************************************************/
2718/* singly-linked list management, used when the expected list length is short */
1512 2719
1513void inline_size 2720inline_size void
1514wlist_add (WL *head, WL elem) 2721wlist_add (WL *head, WL elem)
1515{ 2722{
1516 elem->next = *head; 2723 elem->next = *head;
1517 *head = elem; 2724 *head = elem;
1518} 2725}
1519 2726
1520void inline_size 2727inline_size void
1521wlist_del (WL *head, WL elem) 2728wlist_del (WL *head, WL elem)
1522{ 2729{
1523 while (*head) 2730 while (*head)
1524 { 2731 {
1525 if (*head == elem) 2732 if (expect_true (*head == elem))
1526 { 2733 {
1527 *head = elem->next; 2734 *head = elem->next;
1528 return; 2735 break;
1529 } 2736 }
1530 2737
1531 head = &(*head)->next; 2738 head = &(*head)->next;
1532 } 2739 }
1533} 2740}
1534 2741
1535void inline_speed 2742/* internal, faster, version of ev_clear_pending */
2743inline_speed void
1536clear_pending (EV_P_ W w) 2744clear_pending (EV_P_ W w)
1537{ 2745{
1538 if (w->pending) 2746 if (w->pending)
1539 { 2747 {
1540 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2748 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1541 w->pending = 0; 2749 w->pending = 0;
1542 } 2750 }
1543} 2751}
1544 2752
1545int 2753int
1546ev_clear_pending (EV_P_ void *w) 2754ev_clear_pending (EV_P_ void *w)
1547{ 2755{
1548 W w_ = (W)w; 2756 W w_ = (W)w;
1549 int pending = w_->pending; 2757 int pending = w_->pending;
1550 2758
1551 if (!pending) 2759 if (expect_true (pending))
2760 {
2761 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2762 p->w = (W)&pending_w;
2763 w_->pending = 0;
2764 return p->events;
2765 }
2766 else
1552 return 0; 2767 return 0;
1553
1554 w_->pending = 0;
1555 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1556 p->w = 0;
1557
1558 return p->events;
1559} 2768}
1560 2769
1561void inline_size 2770inline_size void
1562pri_adjust (EV_P_ W w) 2771pri_adjust (EV_P_ W w)
1563{ 2772{
1564 int pri = w->priority; 2773 int pri = ev_priority (w);
1565 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2774 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1566 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2775 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1567 w->priority = pri; 2776 ev_set_priority (w, pri);
1568} 2777}
1569 2778
1570void inline_speed 2779inline_speed void
1571ev_start (EV_P_ W w, int active) 2780ev_start (EV_P_ W w, int active)
1572{ 2781{
1573 pri_adjust (EV_A_ w); 2782 pri_adjust (EV_A_ w);
1574 w->active = active; 2783 w->active = active;
1575 ev_ref (EV_A); 2784 ev_ref (EV_A);
1576} 2785}
1577 2786
1578void inline_size 2787inline_size void
1579ev_stop (EV_P_ W w) 2788ev_stop (EV_P_ W w)
1580{ 2789{
1581 ev_unref (EV_A); 2790 ev_unref (EV_A);
1582 w->active = 0; 2791 w->active = 0;
1583} 2792}
1584 2793
1585/*****************************************************************************/ 2794/*****************************************************************************/
1586 2795
1587void 2796void noinline
1588ev_io_start (EV_P_ ev_io *w) 2797ev_io_start (EV_P_ ev_io *w)
1589{ 2798{
1590 int fd = w->fd; 2799 int fd = w->fd;
1591 2800
1592 if (expect_false (ev_is_active (w))) 2801 if (expect_false (ev_is_active (w)))
1593 return; 2802 return;
1594 2803
1595 assert (("ev_io_start called with negative fd", fd >= 0)); 2804 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2805 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2806
2807 EV_FREQUENT_CHECK;
1596 2808
1597 ev_start (EV_A_ (W)w, 1); 2809 ev_start (EV_A_ (W)w, 1);
1598 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2810 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1599 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2811 wlist_add (&anfds[fd].head, (WL)w);
1600 2812
1601 fd_change (EV_A_ fd); 2813 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1602} 2814 w->events &= ~EV__IOFDSET;
1603 2815
1604void 2816 EV_FREQUENT_CHECK;
2817}
2818
2819void noinline
1605ev_io_stop (EV_P_ ev_io *w) 2820ev_io_stop (EV_P_ ev_io *w)
1606{ 2821{
1607 clear_pending (EV_A_ (W)w); 2822 clear_pending (EV_A_ (W)w);
1608 if (expect_false (!ev_is_active (w))) 2823 if (expect_false (!ev_is_active (w)))
1609 return; 2824 return;
1610 2825
1611 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2826 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1612 2827
2828 EV_FREQUENT_CHECK;
2829
1613 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2830 wlist_del (&anfds[w->fd].head, (WL)w);
1614 ev_stop (EV_A_ (W)w); 2831 ev_stop (EV_A_ (W)w);
1615 2832
1616 fd_change (EV_A_ w->fd); 2833 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1617}
1618 2834
1619void 2835 EV_FREQUENT_CHECK;
2836}
2837
2838void noinline
1620ev_timer_start (EV_P_ ev_timer *w) 2839ev_timer_start (EV_P_ ev_timer *w)
1621{ 2840{
1622 if (expect_false (ev_is_active (w))) 2841 if (expect_false (ev_is_active (w)))
1623 return; 2842 return;
1624 2843
1625 ((WT)w)->at += mn_now; 2844 ev_at (w) += mn_now;
1626 2845
1627 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2846 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1628 2847
2848 EV_FREQUENT_CHECK;
2849
2850 ++timercnt;
1629 ev_start (EV_A_ (W)w, ++timercnt); 2851 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1630 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2852 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1631 timers [timercnt - 1] = w; 2853 ANHE_w (timers [ev_active (w)]) = (WT)w;
1632 upheap ((WT *)timers, timercnt - 1); 2854 ANHE_at_cache (timers [ev_active (w)]);
2855 upheap (timers, ev_active (w));
1633 2856
2857 EV_FREQUENT_CHECK;
2858
1634 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2859 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1635} 2860}
1636 2861
1637void 2862void noinline
1638ev_timer_stop (EV_P_ ev_timer *w) 2863ev_timer_stop (EV_P_ ev_timer *w)
1639{ 2864{
1640 clear_pending (EV_A_ (W)w); 2865 clear_pending (EV_A_ (W)w);
1641 if (expect_false (!ev_is_active (w))) 2866 if (expect_false (!ev_is_active (w)))
1642 return; 2867 return;
1643 2868
1644 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2869 EV_FREQUENT_CHECK;
1645 2870
1646 { 2871 {
1647 int active = ((W)w)->active; 2872 int active = ev_active (w);
1648 2873
2874 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2875
2876 --timercnt;
2877
1649 if (expect_true (--active < --timercnt)) 2878 if (expect_true (active < timercnt + HEAP0))
1650 { 2879 {
1651 timers [active] = timers [timercnt]; 2880 timers [active] = timers [timercnt + HEAP0];
1652 adjustheap ((WT *)timers, timercnt, active); 2881 adjustheap (timers, timercnt, active);
1653 } 2882 }
1654 } 2883 }
1655 2884
1656 ((WT)w)->at -= mn_now; 2885 ev_at (w) -= mn_now;
1657 2886
1658 ev_stop (EV_A_ (W)w); 2887 ev_stop (EV_A_ (W)w);
1659}
1660 2888
1661void 2889 EV_FREQUENT_CHECK;
2890}
2891
2892void noinline
1662ev_timer_again (EV_P_ ev_timer *w) 2893ev_timer_again (EV_P_ ev_timer *w)
1663{ 2894{
2895 EV_FREQUENT_CHECK;
2896
1664 if (ev_is_active (w)) 2897 if (ev_is_active (w))
1665 { 2898 {
1666 if (w->repeat) 2899 if (w->repeat)
1667 { 2900 {
1668 ((WT)w)->at = mn_now + w->repeat; 2901 ev_at (w) = mn_now + w->repeat;
2902 ANHE_at_cache (timers [ev_active (w)]);
1669 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2903 adjustheap (timers, timercnt, ev_active (w));
1670 } 2904 }
1671 else 2905 else
1672 ev_timer_stop (EV_A_ w); 2906 ev_timer_stop (EV_A_ w);
1673 } 2907 }
1674 else if (w->repeat) 2908 else if (w->repeat)
1675 { 2909 {
1676 w->at = w->repeat; 2910 ev_at (w) = w->repeat;
1677 ev_timer_start (EV_A_ w); 2911 ev_timer_start (EV_A_ w);
1678 } 2912 }
2913
2914 EV_FREQUENT_CHECK;
2915}
2916
2917ev_tstamp
2918ev_timer_remaining (EV_P_ ev_timer *w)
2919{
2920 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1679} 2921}
1680 2922
1681#if EV_PERIODIC_ENABLE 2923#if EV_PERIODIC_ENABLE
1682void 2924void noinline
1683ev_periodic_start (EV_P_ ev_periodic *w) 2925ev_periodic_start (EV_P_ ev_periodic *w)
1684{ 2926{
1685 if (expect_false (ev_is_active (w))) 2927 if (expect_false (ev_is_active (w)))
1686 return; 2928 return;
1687 2929
1688 if (w->reschedule_cb) 2930 if (w->reschedule_cb)
1689 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2931 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1690 else if (w->interval) 2932 else if (w->interval)
1691 { 2933 {
1692 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2934 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1693 /* this formula differs from the one in periodic_reify because we do not always round up */ 2935 periodic_recalc (EV_A_ w);
1694 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1695 } 2936 }
2937 else
2938 ev_at (w) = w->offset;
1696 2939
2940 EV_FREQUENT_CHECK;
2941
2942 ++periodiccnt;
1697 ev_start (EV_A_ (W)w, ++periodiccnt); 2943 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1698 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2944 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1699 periodics [periodiccnt - 1] = w; 2945 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1700 upheap ((WT *)periodics, periodiccnt - 1); 2946 ANHE_at_cache (periodics [ev_active (w)]);
2947 upheap (periodics, ev_active (w));
1701 2948
2949 EV_FREQUENT_CHECK;
2950
1702 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2951 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1703} 2952}
1704 2953
1705void 2954void noinline
1706ev_periodic_stop (EV_P_ ev_periodic *w) 2955ev_periodic_stop (EV_P_ ev_periodic *w)
1707{ 2956{
1708 clear_pending (EV_A_ (W)w); 2957 clear_pending (EV_A_ (W)w);
1709 if (expect_false (!ev_is_active (w))) 2958 if (expect_false (!ev_is_active (w)))
1710 return; 2959 return;
1711 2960
1712 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2961 EV_FREQUENT_CHECK;
1713 2962
1714 { 2963 {
1715 int active = ((W)w)->active; 2964 int active = ev_active (w);
1716 2965
2966 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2967
2968 --periodiccnt;
2969
1717 if (expect_true (--active < --periodiccnt)) 2970 if (expect_true (active < periodiccnt + HEAP0))
1718 { 2971 {
1719 periodics [active] = periodics [periodiccnt]; 2972 periodics [active] = periodics [periodiccnt + HEAP0];
1720 adjustheap ((WT *)periodics, periodiccnt, active); 2973 adjustheap (periodics, periodiccnt, active);
1721 } 2974 }
1722 } 2975 }
1723 2976
1724 ev_stop (EV_A_ (W)w); 2977 ev_stop (EV_A_ (W)w);
1725}
1726 2978
1727void 2979 EV_FREQUENT_CHECK;
2980}
2981
2982void noinline
1728ev_periodic_again (EV_P_ ev_periodic *w) 2983ev_periodic_again (EV_P_ ev_periodic *w)
1729{ 2984{
1730 /* TODO: use adjustheap and recalculation */ 2985 /* TODO: use adjustheap and recalculation */
1731 ev_periodic_stop (EV_A_ w); 2986 ev_periodic_stop (EV_A_ w);
1732 ev_periodic_start (EV_A_ w); 2987 ev_periodic_start (EV_A_ w);
… …
1735 2990
1736#ifndef SA_RESTART 2991#ifndef SA_RESTART
1737# define SA_RESTART 0 2992# define SA_RESTART 0
1738#endif 2993#endif
1739 2994
1740void 2995#if EV_SIGNAL_ENABLE
2996
2997void noinline
1741ev_signal_start (EV_P_ ev_signal *w) 2998ev_signal_start (EV_P_ ev_signal *w)
1742{ 2999{
1743#if EV_MULTIPLICITY
1744 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1745#endif
1746 if (expect_false (ev_is_active (w))) 3000 if (expect_false (ev_is_active (w)))
1747 return; 3001 return;
1748 3002
1749 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3003 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3004
3005#if EV_MULTIPLICITY
3006 assert (("libev: a signal must not be attached to two different loops",
3007 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3008
3009 signals [w->signum - 1].loop = EV_A;
3010#endif
3011
3012 EV_FREQUENT_CHECK;
3013
3014#if EV_USE_SIGNALFD
3015 if (sigfd == -2)
3016 {
3017 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3018 if (sigfd < 0 && errno == EINVAL)
3019 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3020
3021 if (sigfd >= 0)
3022 {
3023 fd_intern (sigfd); /* doing it twice will not hurt */
3024
3025 sigemptyset (&sigfd_set);
3026
3027 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3028 ev_set_priority (&sigfd_w, EV_MAXPRI);
3029 ev_io_start (EV_A_ &sigfd_w);
3030 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3031 }
3032 }
3033
3034 if (sigfd >= 0)
3035 {
3036 /* TODO: check .head */
3037 sigaddset (&sigfd_set, w->signum);
3038 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3039
3040 signalfd (sigfd, &sigfd_set, 0);
3041 }
3042#endif
1750 3043
1751 ev_start (EV_A_ (W)w, 1); 3044 ev_start (EV_A_ (W)w, 1);
1752 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1753 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3045 wlist_add (&signals [w->signum - 1].head, (WL)w);
1754 3046
1755 if (!((WL)w)->next) 3047 if (!((WL)w)->next)
3048# if EV_USE_SIGNALFD
3049 if (sigfd < 0) /*TODO*/
3050# endif
1756 { 3051 {
1757#if _WIN32 3052# ifdef _WIN32
3053 evpipe_init (EV_A);
3054
1758 signal (w->signum, sighandler); 3055 signal (w->signum, ev_sighandler);
1759#else 3056# else
1760 struct sigaction sa; 3057 struct sigaction sa;
3058
3059 evpipe_init (EV_A);
3060
1761 sa.sa_handler = sighandler; 3061 sa.sa_handler = ev_sighandler;
1762 sigfillset (&sa.sa_mask); 3062 sigfillset (&sa.sa_mask);
1763 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3063 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1764 sigaction (w->signum, &sa, 0); 3064 sigaction (w->signum, &sa, 0);
3065
3066 if (origflags & EVFLAG_NOSIGMASK)
3067 {
3068 sigemptyset (&sa.sa_mask);
3069 sigaddset (&sa.sa_mask, w->signum);
3070 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3071 }
1765#endif 3072#endif
1766 } 3073 }
1767}
1768 3074
1769void 3075 EV_FREQUENT_CHECK;
3076}
3077
3078void noinline
1770ev_signal_stop (EV_P_ ev_signal *w) 3079ev_signal_stop (EV_P_ ev_signal *w)
1771{ 3080{
1772 clear_pending (EV_A_ (W)w); 3081 clear_pending (EV_A_ (W)w);
1773 if (expect_false (!ev_is_active (w))) 3082 if (expect_false (!ev_is_active (w)))
1774 return; 3083 return;
1775 3084
3085 EV_FREQUENT_CHECK;
3086
1776 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3087 wlist_del (&signals [w->signum - 1].head, (WL)w);
1777 ev_stop (EV_A_ (W)w); 3088 ev_stop (EV_A_ (W)w);
1778 3089
1779 if (!signals [w->signum - 1].head) 3090 if (!signals [w->signum - 1].head)
3091 {
3092#if EV_MULTIPLICITY
3093 signals [w->signum - 1].loop = 0; /* unattach from signal */
3094#endif
3095#if EV_USE_SIGNALFD
3096 if (sigfd >= 0)
3097 {
3098 sigset_t ss;
3099
3100 sigemptyset (&ss);
3101 sigaddset (&ss, w->signum);
3102 sigdelset (&sigfd_set, w->signum);
3103
3104 signalfd (sigfd, &sigfd_set, 0);
3105 sigprocmask (SIG_UNBLOCK, &ss, 0);
3106 }
3107 else
3108#endif
1780 signal (w->signum, SIG_DFL); 3109 signal (w->signum, SIG_DFL);
3110 }
3111
3112 EV_FREQUENT_CHECK;
1781} 3113}
3114
3115#endif
3116
3117#if EV_CHILD_ENABLE
1782 3118
1783void 3119void
1784ev_child_start (EV_P_ ev_child *w) 3120ev_child_start (EV_P_ ev_child *w)
1785{ 3121{
1786#if EV_MULTIPLICITY 3122#if EV_MULTIPLICITY
1787 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3123 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1788#endif 3124#endif
1789 if (expect_false (ev_is_active (w))) 3125 if (expect_false (ev_is_active (w)))
1790 return; 3126 return;
1791 3127
3128 EV_FREQUENT_CHECK;
3129
1792 ev_start (EV_A_ (W)w, 1); 3130 ev_start (EV_A_ (W)w, 1);
1793 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3131 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3132
3133 EV_FREQUENT_CHECK;
1794} 3134}
1795 3135
1796void 3136void
1797ev_child_stop (EV_P_ ev_child *w) 3137ev_child_stop (EV_P_ ev_child *w)
1798{ 3138{
1799 clear_pending (EV_A_ (W)w); 3139 clear_pending (EV_A_ (W)w);
1800 if (expect_false (!ev_is_active (w))) 3140 if (expect_false (!ev_is_active (w)))
1801 return; 3141 return;
1802 3142
3143 EV_FREQUENT_CHECK;
3144
1803 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3145 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1804 ev_stop (EV_A_ (W)w); 3146 ev_stop (EV_A_ (W)w);
3147
3148 EV_FREQUENT_CHECK;
1805} 3149}
3150
3151#endif
1806 3152
1807#if EV_STAT_ENABLE 3153#if EV_STAT_ENABLE
1808 3154
1809# ifdef _WIN32 3155# ifdef _WIN32
1810# undef lstat 3156# undef lstat
1811# define lstat(a,b) _stati64 (a,b) 3157# define lstat(a,b) _stati64 (a,b)
1812# endif 3158# endif
1813 3159
1814#define DEF_STAT_INTERVAL 5.0074891 3160#define DEF_STAT_INTERVAL 5.0074891
3161#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1815#define MIN_STAT_INTERVAL 0.1074891 3162#define MIN_STAT_INTERVAL 0.1074891
1816 3163
1817static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3164static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1818 3165
1819#if EV_USE_INOTIFY 3166#if EV_USE_INOTIFY
1820# define EV_INOTIFY_BUFSIZE 8192 3167
3168/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3169# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1821 3170
1822static void noinline 3171static void noinline
1823infy_add (EV_P_ ev_stat *w) 3172infy_add (EV_P_ ev_stat *w)
1824{ 3173{
1825 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); 3174 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);
1826 3175
1827 if (w->wd < 0) 3176 if (w->wd >= 0)
3177 {
3178 struct statfs sfs;
3179
3180 /* now local changes will be tracked by inotify, but remote changes won't */
3181 /* unless the filesystem is known to be local, we therefore still poll */
3182 /* also do poll on <2.6.25, but with normal frequency */
3183
3184 if (!fs_2625)
3185 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3186 else if (!statfs (w->path, &sfs)
3187 && (sfs.f_type == 0x1373 /* devfs */
3188 || sfs.f_type == 0xEF53 /* ext2/3 */
3189 || sfs.f_type == 0x3153464a /* jfs */
3190 || sfs.f_type == 0x52654973 /* reiser3 */
3191 || sfs.f_type == 0x01021994 /* tempfs */
3192 || sfs.f_type == 0x58465342 /* xfs */))
3193 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3194 else
3195 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1828 { 3196 }
1829 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3197 else
3198 {
3199 /* can't use inotify, continue to stat */
3200 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1830 3201
1831 /* monitor some parent directory for speedup hints */ 3202 /* if path is not there, monitor some parent directory for speedup hints */
3203 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3204 /* but an efficiency issue only */
1832 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3205 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1833 { 3206 {
1834 char path [4096]; 3207 char path [4096];
1835 strcpy (path, w->path); 3208 strcpy (path, w->path);
1836 3209
… …
1839 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3212 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1840 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3213 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1841 3214
1842 char *pend = strrchr (path, '/'); 3215 char *pend = strrchr (path, '/');
1843 3216
1844 if (!pend) 3217 if (!pend || pend == path)
1845 break; /* whoops, no '/', complain to your admin */ 3218 break;
1846 3219
1847 *pend = 0; 3220 *pend = 0;
1848 w->wd = inotify_add_watch (fs_fd, path, mask); 3221 w->wd = inotify_add_watch (fs_fd, path, mask);
1849 } 3222 }
1850 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3223 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1851 } 3224 }
1852 } 3225 }
1853 else
1854 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1855 3226
1856 if (w->wd >= 0) 3227 if (w->wd >= 0)
1857 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3228 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3229
3230 /* now re-arm timer, if required */
3231 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3232 ev_timer_again (EV_A_ &w->timer);
3233 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1858} 3234}
1859 3235
1860static void noinline 3236static void noinline
1861infy_del (EV_P_ ev_stat *w) 3237infy_del (EV_P_ ev_stat *w)
1862{ 3238{
… …
1865 3241
1866 if (wd < 0) 3242 if (wd < 0)
1867 return; 3243 return;
1868 3244
1869 w->wd = -2; 3245 w->wd = -2;
1870 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3246 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1871 wlist_del (&fs_hash [slot].head, (WL)w); 3247 wlist_del (&fs_hash [slot].head, (WL)w);
1872 3248
1873 /* remove this watcher, if others are watching it, they will rearm */ 3249 /* remove this watcher, if others are watching it, they will rearm */
1874 inotify_rm_watch (fs_fd, wd); 3250 inotify_rm_watch (fs_fd, wd);
1875} 3251}
1876 3252
1877static void noinline 3253static void noinline
1878infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3254infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1879{ 3255{
1880 if (slot < 0) 3256 if (slot < 0)
1881 /* overflow, need to check for all hahs slots */ 3257 /* overflow, need to check for all hash slots */
1882 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3258 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1883 infy_wd (EV_A_ slot, wd, ev); 3259 infy_wd (EV_A_ slot, wd, ev);
1884 else 3260 else
1885 { 3261 {
1886 WL w_; 3262 WL w_;
1887 3263
1888 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3264 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1889 { 3265 {
1890 ev_stat *w = (ev_stat *)w_; 3266 ev_stat *w = (ev_stat *)w_;
1891 w_ = w_->next; /* lets us remove this watcher and all before it */ 3267 w_ = w_->next; /* lets us remove this watcher and all before it */
1892 3268
1893 if (w->wd == wd || wd == -1) 3269 if (w->wd == wd || wd == -1)
1894 { 3270 {
1895 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3271 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1896 { 3272 {
3273 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1897 w->wd = -1; 3274 w->wd = -1;
1898 infy_add (EV_A_ w); /* re-add, no matter what */ 3275 infy_add (EV_A_ w); /* re-add, no matter what */
1899 } 3276 }
1900 3277
1901 stat_timer_cb (EV_A_ &w->timer, 0); 3278 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1906 3283
1907static void 3284static void
1908infy_cb (EV_P_ ev_io *w, int revents) 3285infy_cb (EV_P_ ev_io *w, int revents)
1909{ 3286{
1910 char buf [EV_INOTIFY_BUFSIZE]; 3287 char buf [EV_INOTIFY_BUFSIZE];
1911 struct inotify_event *ev = (struct inotify_event *)buf;
1912 int ofs; 3288 int ofs;
1913 int len = read (fs_fd, buf, sizeof (buf)); 3289 int len = read (fs_fd, buf, sizeof (buf));
1914 3290
1915 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3291 for (ofs = 0; ofs < len; )
3292 {
3293 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1916 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3294 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3295 ofs += sizeof (struct inotify_event) + ev->len;
3296 }
1917} 3297}
1918 3298
1919void inline_size 3299inline_size void ecb_cold
3300ev_check_2625 (EV_P)
3301{
3302 /* kernels < 2.6.25 are borked
3303 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3304 */
3305 if (ev_linux_version () < 0x020619)
3306 return;
3307
3308 fs_2625 = 1;
3309}
3310
3311inline_size int
3312infy_newfd (void)
3313{
3314#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3315 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3316 if (fd >= 0)
3317 return fd;
3318#endif
3319 return inotify_init ();
3320}
3321
3322inline_size void
1920infy_init (EV_P) 3323infy_init (EV_P)
1921{ 3324{
1922 if (fs_fd != -2) 3325 if (fs_fd != -2)
1923 return; 3326 return;
1924 3327
3328 fs_fd = -1;
3329
3330 ev_check_2625 (EV_A);
3331
1925 fs_fd = inotify_init (); 3332 fs_fd = infy_newfd ();
1926 3333
1927 if (fs_fd >= 0) 3334 if (fs_fd >= 0)
1928 { 3335 {
3336 fd_intern (fs_fd);
1929 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3337 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1930 ev_set_priority (&fs_w, EV_MAXPRI); 3338 ev_set_priority (&fs_w, EV_MAXPRI);
1931 ev_io_start (EV_A_ &fs_w); 3339 ev_io_start (EV_A_ &fs_w);
3340 ev_unref (EV_A);
1932 } 3341 }
1933} 3342}
1934 3343
1935void inline_size 3344inline_size void
1936infy_fork (EV_P) 3345infy_fork (EV_P)
1937{ 3346{
1938 int slot; 3347 int slot;
1939 3348
1940 if (fs_fd < 0) 3349 if (fs_fd < 0)
1941 return; 3350 return;
1942 3351
3352 ev_ref (EV_A);
3353 ev_io_stop (EV_A_ &fs_w);
1943 close (fs_fd); 3354 close (fs_fd);
1944 fs_fd = inotify_init (); 3355 fs_fd = infy_newfd ();
1945 3356
3357 if (fs_fd >= 0)
3358 {
3359 fd_intern (fs_fd);
3360 ev_io_set (&fs_w, fs_fd, EV_READ);
3361 ev_io_start (EV_A_ &fs_w);
3362 ev_unref (EV_A);
3363 }
3364
1946 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3365 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1947 { 3366 {
1948 WL w_ = fs_hash [slot].head; 3367 WL w_ = fs_hash [slot].head;
1949 fs_hash [slot].head = 0; 3368 fs_hash [slot].head = 0;
1950 3369
1951 while (w_) 3370 while (w_)
… …
1956 w->wd = -1; 3375 w->wd = -1;
1957 3376
1958 if (fs_fd >= 0) 3377 if (fs_fd >= 0)
1959 infy_add (EV_A_ w); /* re-add, no matter what */ 3378 infy_add (EV_A_ w); /* re-add, no matter what */
1960 else 3379 else
3380 {
3381 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3382 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1961 ev_timer_start (EV_A_ &w->timer); 3383 ev_timer_again (EV_A_ &w->timer);
3384 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3385 }
1962 } 3386 }
1963
1964 } 3387 }
1965} 3388}
1966 3389
3390#endif
3391
3392#ifdef _WIN32
3393# define EV_LSTAT(p,b) _stati64 (p, b)
3394#else
3395# define EV_LSTAT(p,b) lstat (p, b)
1967#endif 3396#endif
1968 3397
1969void 3398void
1970ev_stat_stat (EV_P_ ev_stat *w) 3399ev_stat_stat (EV_P_ ev_stat *w)
1971{ 3400{
… …
1978static void noinline 3407static void noinline
1979stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3408stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1980{ 3409{
1981 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3410 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1982 3411
1983 /* we copy this here each the time so that */ 3412 ev_statdata prev = w->attr;
1984 /* prev has the old value when the callback gets invoked */
1985 w->prev = w->attr;
1986 ev_stat_stat (EV_A_ w); 3413 ev_stat_stat (EV_A_ w);
1987 3414
1988 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3415 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1989 if ( 3416 if (
1990 w->prev.st_dev != w->attr.st_dev 3417 prev.st_dev != w->attr.st_dev
1991 || w->prev.st_ino != w->attr.st_ino 3418 || prev.st_ino != w->attr.st_ino
1992 || w->prev.st_mode != w->attr.st_mode 3419 || prev.st_mode != w->attr.st_mode
1993 || w->prev.st_nlink != w->attr.st_nlink 3420 || prev.st_nlink != w->attr.st_nlink
1994 || w->prev.st_uid != w->attr.st_uid 3421 || prev.st_uid != w->attr.st_uid
1995 || w->prev.st_gid != w->attr.st_gid 3422 || prev.st_gid != w->attr.st_gid
1996 || w->prev.st_rdev != w->attr.st_rdev 3423 || prev.st_rdev != w->attr.st_rdev
1997 || w->prev.st_size != w->attr.st_size 3424 || prev.st_size != w->attr.st_size
1998 || w->prev.st_atime != w->attr.st_atime 3425 || prev.st_atime != w->attr.st_atime
1999 || w->prev.st_mtime != w->attr.st_mtime 3426 || prev.st_mtime != w->attr.st_mtime
2000 || w->prev.st_ctime != w->attr.st_ctime 3427 || prev.st_ctime != w->attr.st_ctime
2001 ) { 3428 ) {
3429 /* we only update w->prev on actual differences */
3430 /* in case we test more often than invoke the callback, */
3431 /* to ensure that prev is always different to attr */
3432 w->prev = prev;
3433
2002 #if EV_USE_INOTIFY 3434 #if EV_USE_INOTIFY
3435 if (fs_fd >= 0)
3436 {
2003 infy_del (EV_A_ w); 3437 infy_del (EV_A_ w);
2004 infy_add (EV_A_ w); 3438 infy_add (EV_A_ w);
2005 ev_stat_stat (EV_A_ w); /* avoid race... */ 3439 ev_stat_stat (EV_A_ w); /* avoid race... */
3440 }
2006 #endif 3441 #endif
2007 3442
2008 ev_feed_event (EV_A_ w, EV_STAT); 3443 ev_feed_event (EV_A_ w, EV_STAT);
2009 } 3444 }
2010} 3445}
… …
2013ev_stat_start (EV_P_ ev_stat *w) 3448ev_stat_start (EV_P_ ev_stat *w)
2014{ 3449{
2015 if (expect_false (ev_is_active (w))) 3450 if (expect_false (ev_is_active (w)))
2016 return; 3451 return;
2017 3452
2018 /* since we use memcmp, we need to clear any padding data etc. */
2019 memset (&w->prev, 0, sizeof (ev_statdata));
2020 memset (&w->attr, 0, sizeof (ev_statdata));
2021
2022 ev_stat_stat (EV_A_ w); 3453 ev_stat_stat (EV_A_ w);
2023 3454
3455 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2024 if (w->interval < MIN_STAT_INTERVAL) 3456 w->interval = MIN_STAT_INTERVAL;
2025 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2026 3457
2027 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3458 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2028 ev_set_priority (&w->timer, ev_priority (w)); 3459 ev_set_priority (&w->timer, ev_priority (w));
2029 3460
2030#if EV_USE_INOTIFY 3461#if EV_USE_INOTIFY
2031 infy_init (EV_A); 3462 infy_init (EV_A);
2032 3463
2033 if (fs_fd >= 0) 3464 if (fs_fd >= 0)
2034 infy_add (EV_A_ w); 3465 infy_add (EV_A_ w);
2035 else 3466 else
2036#endif 3467#endif
3468 {
2037 ev_timer_start (EV_A_ &w->timer); 3469 ev_timer_again (EV_A_ &w->timer);
3470 ev_unref (EV_A);
3471 }
2038 3472
2039 ev_start (EV_A_ (W)w, 1); 3473 ev_start (EV_A_ (W)w, 1);
3474
3475 EV_FREQUENT_CHECK;
2040} 3476}
2041 3477
2042void 3478void
2043ev_stat_stop (EV_P_ ev_stat *w) 3479ev_stat_stop (EV_P_ ev_stat *w)
2044{ 3480{
2045 clear_pending (EV_A_ (W)w); 3481 clear_pending (EV_A_ (W)w);
2046 if (expect_false (!ev_is_active (w))) 3482 if (expect_false (!ev_is_active (w)))
2047 return; 3483 return;
2048 3484
3485 EV_FREQUENT_CHECK;
3486
2049#if EV_USE_INOTIFY 3487#if EV_USE_INOTIFY
2050 infy_del (EV_A_ w); 3488 infy_del (EV_A_ w);
2051#endif 3489#endif
3490
3491 if (ev_is_active (&w->timer))
3492 {
3493 ev_ref (EV_A);
2052 ev_timer_stop (EV_A_ &w->timer); 3494 ev_timer_stop (EV_A_ &w->timer);
3495 }
2053 3496
2054 ev_stop (EV_A_ (W)w); 3497 ev_stop (EV_A_ (W)w);
3498
3499 EV_FREQUENT_CHECK;
2055} 3500}
2056#endif 3501#endif
2057 3502
2058#if EV_IDLE_ENABLE 3503#if EV_IDLE_ENABLE
2059void 3504void
… …
2062 if (expect_false (ev_is_active (w))) 3507 if (expect_false (ev_is_active (w)))
2063 return; 3508 return;
2064 3509
2065 pri_adjust (EV_A_ (W)w); 3510 pri_adjust (EV_A_ (W)w);
2066 3511
3512 EV_FREQUENT_CHECK;
3513
2067 { 3514 {
2068 int active = ++idlecnt [ABSPRI (w)]; 3515 int active = ++idlecnt [ABSPRI (w)];
2069 3516
2070 ++idleall; 3517 ++idleall;
2071 ev_start (EV_A_ (W)w, active); 3518 ev_start (EV_A_ (W)w, active);
2072 3519
2073 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3520 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2074 idles [ABSPRI (w)][active - 1] = w; 3521 idles [ABSPRI (w)][active - 1] = w;
2075 } 3522 }
3523
3524 EV_FREQUENT_CHECK;
2076} 3525}
2077 3526
2078void 3527void
2079ev_idle_stop (EV_P_ ev_idle *w) 3528ev_idle_stop (EV_P_ ev_idle *w)
2080{ 3529{
2081 clear_pending (EV_A_ (W)w); 3530 clear_pending (EV_A_ (W)w);
2082 if (expect_false (!ev_is_active (w))) 3531 if (expect_false (!ev_is_active (w)))
2083 return; 3532 return;
2084 3533
3534 EV_FREQUENT_CHECK;
3535
2085 { 3536 {
2086 int active = ((W)w)->active; 3537 int active = ev_active (w);
2087 3538
2088 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3539 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2089 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3540 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2090 3541
2091 ev_stop (EV_A_ (W)w); 3542 ev_stop (EV_A_ (W)w);
2092 --idleall; 3543 --idleall;
2093 } 3544 }
2094}
2095#endif
2096 3545
3546 EV_FREQUENT_CHECK;
3547}
3548#endif
3549
3550#if EV_PREPARE_ENABLE
2097void 3551void
2098ev_prepare_start (EV_P_ ev_prepare *w) 3552ev_prepare_start (EV_P_ ev_prepare *w)
2099{ 3553{
2100 if (expect_false (ev_is_active (w))) 3554 if (expect_false (ev_is_active (w)))
2101 return; 3555 return;
3556
3557 EV_FREQUENT_CHECK;
2102 3558
2103 ev_start (EV_A_ (W)w, ++preparecnt); 3559 ev_start (EV_A_ (W)w, ++preparecnt);
2104 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3560 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2105 prepares [preparecnt - 1] = w; 3561 prepares [preparecnt - 1] = w;
3562
3563 EV_FREQUENT_CHECK;
2106} 3564}
2107 3565
2108void 3566void
2109ev_prepare_stop (EV_P_ ev_prepare *w) 3567ev_prepare_stop (EV_P_ ev_prepare *w)
2110{ 3568{
2111 clear_pending (EV_A_ (W)w); 3569 clear_pending (EV_A_ (W)w);
2112 if (expect_false (!ev_is_active (w))) 3570 if (expect_false (!ev_is_active (w)))
2113 return; 3571 return;
2114 3572
3573 EV_FREQUENT_CHECK;
3574
2115 { 3575 {
2116 int active = ((W)w)->active; 3576 int active = ev_active (w);
3577
2117 prepares [active - 1] = prepares [--preparecnt]; 3578 prepares [active - 1] = prepares [--preparecnt];
2118 ((W)prepares [active - 1])->active = active; 3579 ev_active (prepares [active - 1]) = active;
2119 } 3580 }
2120 3581
2121 ev_stop (EV_A_ (W)w); 3582 ev_stop (EV_A_ (W)w);
2122}
2123 3583
3584 EV_FREQUENT_CHECK;
3585}
3586#endif
3587
3588#if EV_CHECK_ENABLE
2124void 3589void
2125ev_check_start (EV_P_ ev_check *w) 3590ev_check_start (EV_P_ ev_check *w)
2126{ 3591{
2127 if (expect_false (ev_is_active (w))) 3592 if (expect_false (ev_is_active (w)))
2128 return; 3593 return;
3594
3595 EV_FREQUENT_CHECK;
2129 3596
2130 ev_start (EV_A_ (W)w, ++checkcnt); 3597 ev_start (EV_A_ (W)w, ++checkcnt);
2131 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3598 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2132 checks [checkcnt - 1] = w; 3599 checks [checkcnt - 1] = w;
3600
3601 EV_FREQUENT_CHECK;
2133} 3602}
2134 3603
2135void 3604void
2136ev_check_stop (EV_P_ ev_check *w) 3605ev_check_stop (EV_P_ ev_check *w)
2137{ 3606{
2138 clear_pending (EV_A_ (W)w); 3607 clear_pending (EV_A_ (W)w);
2139 if (expect_false (!ev_is_active (w))) 3608 if (expect_false (!ev_is_active (w)))
2140 return; 3609 return;
2141 3610
3611 EV_FREQUENT_CHECK;
3612
2142 { 3613 {
2143 int active = ((W)w)->active; 3614 int active = ev_active (w);
3615
2144 checks [active - 1] = checks [--checkcnt]; 3616 checks [active - 1] = checks [--checkcnt];
2145 ((W)checks [active - 1])->active = active; 3617 ev_active (checks [active - 1]) = active;
2146 } 3618 }
2147 3619
2148 ev_stop (EV_A_ (W)w); 3620 ev_stop (EV_A_ (W)w);
3621
3622 EV_FREQUENT_CHECK;
2149} 3623}
3624#endif
2150 3625
2151#if EV_EMBED_ENABLE 3626#if EV_EMBED_ENABLE
2152void noinline 3627void noinline
2153ev_embed_sweep (EV_P_ ev_embed *w) 3628ev_embed_sweep (EV_P_ ev_embed *w)
2154{ 3629{
2155 ev_loop (w->loop, EVLOOP_NONBLOCK); 3630 ev_run (w->other, EVRUN_NOWAIT);
2156} 3631}
2157 3632
2158static void 3633static void
2159embed_cb (EV_P_ ev_io *io, int revents) 3634embed_io_cb (EV_P_ ev_io *io, int revents)
2160{ 3635{
2161 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3636 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2162 3637
2163 if (ev_cb (w)) 3638 if (ev_cb (w))
2164 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3639 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2165 else 3640 else
2166 ev_embed_sweep (loop, w); 3641 ev_run (w->other, EVRUN_NOWAIT);
2167} 3642}
3643
3644static void
3645embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3646{
3647 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3648
3649 {
3650 EV_P = w->other;
3651
3652 while (fdchangecnt)
3653 {
3654 fd_reify (EV_A);
3655 ev_run (EV_A_ EVRUN_NOWAIT);
3656 }
3657 }
3658}
3659
3660static void
3661embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3662{
3663 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3664
3665 ev_embed_stop (EV_A_ w);
3666
3667 {
3668 EV_P = w->other;
3669
3670 ev_loop_fork (EV_A);
3671 ev_run (EV_A_ EVRUN_NOWAIT);
3672 }
3673
3674 ev_embed_start (EV_A_ w);
3675}
3676
3677#if 0
3678static void
3679embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3680{
3681 ev_idle_stop (EV_A_ idle);
3682}
3683#endif
2168 3684
2169void 3685void
2170ev_embed_start (EV_P_ ev_embed *w) 3686ev_embed_start (EV_P_ ev_embed *w)
2171{ 3687{
2172 if (expect_false (ev_is_active (w))) 3688 if (expect_false (ev_is_active (w)))
2173 return; 3689 return;
2174 3690
2175 { 3691 {
2176 struct ev_loop *loop = w->loop; 3692 EV_P = w->other;
2177 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3693 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2178 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3694 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2179 } 3695 }
3696
3697 EV_FREQUENT_CHECK;
2180 3698
2181 ev_set_priority (&w->io, ev_priority (w)); 3699 ev_set_priority (&w->io, ev_priority (w));
2182 ev_io_start (EV_A_ &w->io); 3700 ev_io_start (EV_A_ &w->io);
2183 3701
3702 ev_prepare_init (&w->prepare, embed_prepare_cb);
3703 ev_set_priority (&w->prepare, EV_MINPRI);
3704 ev_prepare_start (EV_A_ &w->prepare);
3705
3706 ev_fork_init (&w->fork, embed_fork_cb);
3707 ev_fork_start (EV_A_ &w->fork);
3708
3709 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3710
2184 ev_start (EV_A_ (W)w, 1); 3711 ev_start (EV_A_ (W)w, 1);
3712
3713 EV_FREQUENT_CHECK;
2185} 3714}
2186 3715
2187void 3716void
2188ev_embed_stop (EV_P_ ev_embed *w) 3717ev_embed_stop (EV_P_ ev_embed *w)
2189{ 3718{
2190 clear_pending (EV_A_ (W)w); 3719 clear_pending (EV_A_ (W)w);
2191 if (expect_false (!ev_is_active (w))) 3720 if (expect_false (!ev_is_active (w)))
2192 return; 3721 return;
2193 3722
3723 EV_FREQUENT_CHECK;
3724
2194 ev_io_stop (EV_A_ &w->io); 3725 ev_io_stop (EV_A_ &w->io);
3726 ev_prepare_stop (EV_A_ &w->prepare);
3727 ev_fork_stop (EV_A_ &w->fork);
2195 3728
2196 ev_stop (EV_A_ (W)w); 3729 ev_stop (EV_A_ (W)w);
3730
3731 EV_FREQUENT_CHECK;
2197} 3732}
2198#endif 3733#endif
2199 3734
2200#if EV_FORK_ENABLE 3735#if EV_FORK_ENABLE
2201void 3736void
2202ev_fork_start (EV_P_ ev_fork *w) 3737ev_fork_start (EV_P_ ev_fork *w)
2203{ 3738{
2204 if (expect_false (ev_is_active (w))) 3739 if (expect_false (ev_is_active (w)))
2205 return; 3740 return;
2206 3741
3742 EV_FREQUENT_CHECK;
3743
2207 ev_start (EV_A_ (W)w, ++forkcnt); 3744 ev_start (EV_A_ (W)w, ++forkcnt);
2208 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3745 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2209 forks [forkcnt - 1] = w; 3746 forks [forkcnt - 1] = w;
3747
3748 EV_FREQUENT_CHECK;
2210} 3749}
2211 3750
2212void 3751void
2213ev_fork_stop (EV_P_ ev_fork *w) 3752ev_fork_stop (EV_P_ ev_fork *w)
2214{ 3753{
2215 clear_pending (EV_A_ (W)w); 3754 clear_pending (EV_A_ (W)w);
2216 if (expect_false (!ev_is_active (w))) 3755 if (expect_false (!ev_is_active (w)))
2217 return; 3756 return;
2218 3757
3758 EV_FREQUENT_CHECK;
3759
2219 { 3760 {
2220 int active = ((W)w)->active; 3761 int active = ev_active (w);
3762
2221 forks [active - 1] = forks [--forkcnt]; 3763 forks [active - 1] = forks [--forkcnt];
2222 ((W)forks [active - 1])->active = active; 3764 ev_active (forks [active - 1]) = active;
2223 } 3765 }
2224 3766
2225 ev_stop (EV_A_ (W)w); 3767 ev_stop (EV_A_ (W)w);
3768
3769 EV_FREQUENT_CHECK;
3770}
3771#endif
3772
3773#if EV_CLEANUP_ENABLE
3774void
3775ev_cleanup_start (EV_P_ ev_cleanup *w)
3776{
3777 if (expect_false (ev_is_active (w)))
3778 return;
3779
3780 EV_FREQUENT_CHECK;
3781
3782 ev_start (EV_A_ (W)w, ++cleanupcnt);
3783 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3784 cleanups [cleanupcnt - 1] = w;
3785
3786 /* cleanup watchers should never keep a refcount on the loop */
3787 ev_unref (EV_A);
3788 EV_FREQUENT_CHECK;
3789}
3790
3791void
3792ev_cleanup_stop (EV_P_ ev_cleanup *w)
3793{
3794 clear_pending (EV_A_ (W)w);
3795 if (expect_false (!ev_is_active (w)))
3796 return;
3797
3798 EV_FREQUENT_CHECK;
3799 ev_ref (EV_A);
3800
3801 {
3802 int active = ev_active (w);
3803
3804 cleanups [active - 1] = cleanups [--cleanupcnt];
3805 ev_active (cleanups [active - 1]) = active;
3806 }
3807
3808 ev_stop (EV_A_ (W)w);
3809
3810 EV_FREQUENT_CHECK;
3811}
3812#endif
3813
3814#if EV_ASYNC_ENABLE
3815void
3816ev_async_start (EV_P_ ev_async *w)
3817{
3818 if (expect_false (ev_is_active (w)))
3819 return;
3820
3821 w->sent = 0;
3822
3823 evpipe_init (EV_A);
3824
3825 EV_FREQUENT_CHECK;
3826
3827 ev_start (EV_A_ (W)w, ++asynccnt);
3828 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3829 asyncs [asynccnt - 1] = w;
3830
3831 EV_FREQUENT_CHECK;
3832}
3833
3834void
3835ev_async_stop (EV_P_ ev_async *w)
3836{
3837 clear_pending (EV_A_ (W)w);
3838 if (expect_false (!ev_is_active (w)))
3839 return;
3840
3841 EV_FREQUENT_CHECK;
3842
3843 {
3844 int active = ev_active (w);
3845
3846 asyncs [active - 1] = asyncs [--asynccnt];
3847 ev_active (asyncs [active - 1]) = active;
3848 }
3849
3850 ev_stop (EV_A_ (W)w);
3851
3852 EV_FREQUENT_CHECK;
3853}
3854
3855void
3856ev_async_send (EV_P_ ev_async *w)
3857{
3858 w->sent = 1;
3859 evpipe_write (EV_A_ &async_pending);
2226} 3860}
2227#endif 3861#endif
2228 3862
2229/*****************************************************************************/ 3863/*****************************************************************************/
2230 3864
… …
2240once_cb (EV_P_ struct ev_once *once, int revents) 3874once_cb (EV_P_ struct ev_once *once, int revents)
2241{ 3875{
2242 void (*cb)(int revents, void *arg) = once->cb; 3876 void (*cb)(int revents, void *arg) = once->cb;
2243 void *arg = once->arg; 3877 void *arg = once->arg;
2244 3878
2245 ev_io_stop (EV_A_ &once->io); 3879 ev_io_stop (EV_A_ &once->io);
2246 ev_timer_stop (EV_A_ &once->to); 3880 ev_timer_stop (EV_A_ &once->to);
2247 ev_free (once); 3881 ev_free (once);
2248 3882
2249 cb (revents, arg); 3883 cb (revents, arg);
2250} 3884}
2251 3885
2252static void 3886static void
2253once_cb_io (EV_P_ ev_io *w, int revents) 3887once_cb_io (EV_P_ ev_io *w, int revents)
2254{ 3888{
2255 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3889 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3890
3891 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2256} 3892}
2257 3893
2258static void 3894static void
2259once_cb_to (EV_P_ ev_timer *w, int revents) 3895once_cb_to (EV_P_ ev_timer *w, int revents)
2260{ 3896{
2261 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3897 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3898
3899 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2262} 3900}
2263 3901
2264void 3902void
2265ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3903ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2266{ 3904{
2267 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3905 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2268 3906
2269 if (expect_false (!once)) 3907 if (expect_false (!once))
2270 { 3908 {
2271 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3909 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2272 return; 3910 return;
2273 } 3911 }
2274 3912
2275 once->cb = cb; 3913 once->cb = cb;
2276 once->arg = arg; 3914 once->arg = arg;
… …
2288 ev_timer_set (&once->to, timeout, 0.); 3926 ev_timer_set (&once->to, timeout, 0.);
2289 ev_timer_start (EV_A_ &once->to); 3927 ev_timer_start (EV_A_ &once->to);
2290 } 3928 }
2291} 3929}
2292 3930
2293#ifdef __cplusplus 3931/*****************************************************************************/
2294} 3932
3933#if EV_WALK_ENABLE
3934void ecb_cold
3935ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3936{
3937 int i, j;
3938 ev_watcher_list *wl, *wn;
3939
3940 if (types & (EV_IO | EV_EMBED))
3941 for (i = 0; i < anfdmax; ++i)
3942 for (wl = anfds [i].head; wl; )
3943 {
3944 wn = wl->next;
3945
3946#if EV_EMBED_ENABLE
3947 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3948 {
3949 if (types & EV_EMBED)
3950 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3951 }
3952 else
3953#endif
3954#if EV_USE_INOTIFY
3955 if (ev_cb ((ev_io *)wl) == infy_cb)
3956 ;
3957 else
3958#endif
3959 if ((ev_io *)wl != &pipe_w)
3960 if (types & EV_IO)
3961 cb (EV_A_ EV_IO, wl);
3962
3963 wl = wn;
3964 }
3965
3966 if (types & (EV_TIMER | EV_STAT))
3967 for (i = timercnt + HEAP0; i-- > HEAP0; )
3968#if EV_STAT_ENABLE
3969 /*TODO: timer is not always active*/
3970 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3971 {
3972 if (types & EV_STAT)
3973 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3974 }
3975 else
3976#endif
3977 if (types & EV_TIMER)
3978 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3979
3980#if EV_PERIODIC_ENABLE
3981 if (types & EV_PERIODIC)
3982 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3983 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3984#endif
3985
3986#if EV_IDLE_ENABLE
3987 if (types & EV_IDLE)
3988 for (j = NUMPRI; i--; )
3989 for (i = idlecnt [j]; i--; )
3990 cb (EV_A_ EV_IDLE, idles [j][i]);
3991#endif
3992
3993#if EV_FORK_ENABLE
3994 if (types & EV_FORK)
3995 for (i = forkcnt; i--; )
3996 if (ev_cb (forks [i]) != embed_fork_cb)
3997 cb (EV_A_ EV_FORK, forks [i]);
3998#endif
3999
4000#if EV_ASYNC_ENABLE
4001 if (types & EV_ASYNC)
4002 for (i = asynccnt; i--; )
4003 cb (EV_A_ EV_ASYNC, asyncs [i]);
4004#endif
4005
4006#if EV_PREPARE_ENABLE
4007 if (types & EV_PREPARE)
4008 for (i = preparecnt; i--; )
4009# if EV_EMBED_ENABLE
4010 if (ev_cb (prepares [i]) != embed_prepare_cb)
2295#endif 4011# endif
4012 cb (EV_A_ EV_PREPARE, prepares [i]);
4013#endif
2296 4014
4015#if EV_CHECK_ENABLE
4016 if (types & EV_CHECK)
4017 for (i = checkcnt; i--; )
4018 cb (EV_A_ EV_CHECK, checks [i]);
4019#endif
4020
4021#if EV_SIGNAL_ENABLE
4022 if (types & EV_SIGNAL)
4023 for (i = 0; i < EV_NSIG - 1; ++i)
4024 for (wl = signals [i].head; wl; )
4025 {
4026 wn = wl->next;
4027 cb (EV_A_ EV_SIGNAL, wl);
4028 wl = wn;
4029 }
4030#endif
4031
4032#if EV_CHILD_ENABLE
4033 if (types & EV_CHILD)
4034 for (i = (EV_PID_HASHSIZE); i--; )
4035 for (wl = childs [i]; wl; )
4036 {
4037 wn = wl->next;
4038 cb (EV_A_ EV_CHILD, wl);
4039 wl = wn;
4040 }
4041#endif
4042/* EV_STAT 0x00001000 /* stat data changed */
4043/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4044}
4045#endif
4046
4047#if EV_MULTIPLICITY
4048 #include "ev_wrap.h"
4049#endif
4050
4051EV_CPP(})
4052

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