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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 1.380 by root, Mon Jun 27 19:20:01 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 ocur_ = (cur); \
… …
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 evpipe_init (EV_A);
1526
1527 signals [signum - 1].pending = 1;
1528 evpipe_write (EV_A_ &sig_pending);
1529}
1530
1531static void
1532ev_sighandler (int signum)
1533{
781#ifndef _WIN32 1534#ifdef _WIN32
1535 signal (signum, ev_sighandler);
1536#endif
1537
1538 ev_feed_signal (signum);
1539}
1540
1541void noinline
1542ev_feed_signal_event (EV_P_ int signum)
1543{
1544 WL w;
1545
1546 if (expect_false (signum <= 0 || signum > EV_NSIG))
1547 return;
1548
1549 --signum;
1550
1551#if EV_MULTIPLICITY
1552 /* it is permissible to try to feed a signal to the wrong loop */
1553 /* or, likely more useful, feeding a signal nobody is waiting for */
1554
1555 if (expect_false (signals [signum].loop != EV_A))
1556 return;
1557#endif
1558
1559 signals [signum].pending = 0;
1560
1561 for (w = signals [signum].head; w; w = w->next)
1562 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1563}
1564
1565#if EV_USE_SIGNALFD
1566static void
1567sigfdcb (EV_P_ ev_io *iow, int revents)
1568{
1569 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1570
1571 for (;;)
1572 {
1573 ssize_t res = read (sigfd, si, sizeof (si));
1574
1575 /* not ISO-C, as res might be -1, but works with SuS */
1576 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1577 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1578
1579 if (res < (ssize_t)sizeof (si))
1580 break;
1581 }
1582}
1583#endif
1584
1585#endif
1586
1587/*****************************************************************************/
1588
1589#if EV_CHILD_ENABLE
1590static WL childs [EV_PID_HASHSIZE];
782 1591
783static ev_signal childev; 1592static ev_signal childev;
784 1593
785void inline_speed 1594#ifndef WIFCONTINUED
1595# define WIFCONTINUED(status) 0
1596#endif
1597
1598/* handle a single child status event */
1599inline_speed void
786child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1600child_reap (EV_P_ int chain, int pid, int status)
787{ 1601{
788 ev_child *w; 1602 ev_child *w;
1603 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
789 1604
790 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1605 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1606 {
791 if (w->pid == pid || !w->pid) 1607 if ((w->pid == pid || !w->pid)
1608 && (!traced || (w->flags & 1)))
792 { 1609 {
793 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1610 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; 1611 w->rpid = pid;
795 w->rstatus = status; 1612 w->rstatus = status;
796 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1613 ev_feed_event (EV_A_ (W)w, EV_CHILD);
797 } 1614 }
1615 }
798} 1616}
799 1617
800#ifndef WCONTINUED 1618#ifndef WCONTINUED
801# define WCONTINUED 0 1619# define WCONTINUED 0
802#endif 1620#endif
803 1621
1622/* called on sigchld etc., calls waitpid */
804static void 1623static void
805childcb (EV_P_ ev_signal *sw, int revents) 1624childcb (EV_P_ ev_signal *sw, int revents)
806{ 1625{
807 int pid, status; 1626 int pid, status;
808 1627
… …
811 if (!WCONTINUED 1630 if (!WCONTINUED
812 || errno != EINVAL 1631 || errno != EINVAL
813 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1632 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
814 return; 1633 return;
815 1634
816 /* make sure we are called again until all childs have been reaped */ 1635 /* 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 */ 1636 /* 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); 1637 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
819 1638
820 child_reap (EV_A_ sw, pid, pid, status); 1639 child_reap (EV_A_ pid, pid, status);
821 if (EV_PID_HASHSIZE > 1) 1640 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 */ 1641 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
823} 1642}
824 1643
825#endif 1644#endif
826 1645
827/*****************************************************************************/ 1646/*****************************************************************************/
828 1647
1648#if EV_USE_IOCP
1649# include "ev_iocp.c"
1650#endif
829#if EV_USE_PORT 1651#if EV_USE_PORT
830# include "ev_port.c" 1652# include "ev_port.c"
831#endif 1653#endif
832#if EV_USE_KQUEUE 1654#if EV_USE_KQUEUE
833# include "ev_kqueue.c" 1655# include "ev_kqueue.c"
… …
840#endif 1662#endif
841#if EV_USE_SELECT 1663#if EV_USE_SELECT
842# include "ev_select.c" 1664# include "ev_select.c"
843#endif 1665#endif
844 1666
845int 1667int ecb_cold
846ev_version_major (void) 1668ev_version_major (void)
847{ 1669{
848 return EV_VERSION_MAJOR; 1670 return EV_VERSION_MAJOR;
849} 1671}
850 1672
851int 1673int ecb_cold
852ev_version_minor (void) 1674ev_version_minor (void)
853{ 1675{
854 return EV_VERSION_MINOR; 1676 return EV_VERSION_MINOR;
855} 1677}
856 1678
857/* return true if we are running with elevated privileges and should ignore env variables */ 1679/* return true if we are running with elevated privileges and should ignore env variables */
858int inline_size 1680int inline_size ecb_cold
859enable_secure (void) 1681enable_secure (void)
860{ 1682{
861#ifdef _WIN32 1683#ifdef _WIN32
862 return 0; 1684 return 0;
863#else 1685#else
864 return getuid () != geteuid () 1686 return getuid () != geteuid ()
865 || getgid () != getegid (); 1687 || getgid () != getegid ();
866#endif 1688#endif
867} 1689}
868 1690
869unsigned int 1691unsigned int ecb_cold
870ev_supported_backends (void) 1692ev_supported_backends (void)
871{ 1693{
872 unsigned int flags = 0; 1694 unsigned int flags = 0;
873 1695
874 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1696 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
878 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1700 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
879 1701
880 return flags; 1702 return flags;
881} 1703}
882 1704
883unsigned int 1705unsigned int ecb_cold
884ev_recommended_backends (void) 1706ev_recommended_backends (void)
885{ 1707{
886 unsigned int flags = ev_supported_backends (); 1708 unsigned int flags = ev_supported_backends ();
887 1709
888#ifndef __NetBSD__ 1710#ifndef __NetBSD__
889 /* kqueue is borked on everything but netbsd apparently */ 1711 /* kqueue is borked on everything but netbsd apparently */
890 /* it usually doesn't work correctly on anything but sockets and pipes */ 1712 /* it usually doesn't work correctly on anything but sockets and pipes */
891 flags &= ~EVBACKEND_KQUEUE; 1713 flags &= ~EVBACKEND_KQUEUE;
892#endif 1714#endif
893#ifdef __APPLE__ 1715#ifdef __APPLE__
894 // flags &= ~EVBACKEND_KQUEUE; for documentation 1716 /* only select works correctly on that "unix-certified" platform */
895 flags &= ~EVBACKEND_POLL; 1717 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1718 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1719#endif
1720#ifdef __FreeBSD__
1721 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
896#endif 1722#endif
897 1723
898 return flags; 1724 return flags;
899} 1725}
900 1726
901unsigned int 1727unsigned int ecb_cold
902ev_embeddable_backends (void) 1728ev_embeddable_backends (void)
903{ 1729{
904 return EVBACKEND_EPOLL 1730 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
905 | EVBACKEND_KQUEUE 1731
906 | EVBACKEND_PORT; 1732 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1733 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1734 flags &= ~EVBACKEND_EPOLL;
1735
1736 return flags;
907} 1737}
908 1738
909unsigned int 1739unsigned int
910ev_backend (EV_P) 1740ev_backend (EV_P)
911{ 1741{
912 return backend; 1742 return backend;
913} 1743}
914 1744
1745#if EV_FEATURE_API
915unsigned int 1746unsigned int
916ev_loop_count (EV_P) 1747ev_iteration (EV_P)
917{ 1748{
918 return loop_count; 1749 return loop_count;
919} 1750}
920 1751
1752unsigned int
1753ev_depth (EV_P)
1754{
1755 return loop_depth;
1756}
1757
1758void
1759ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1760{
1761 io_blocktime = interval;
1762}
1763
1764void
1765ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1766{
1767 timeout_blocktime = interval;
1768}
1769
1770void
1771ev_set_userdata (EV_P_ void *data)
1772{
1773 userdata = data;
1774}
1775
1776void *
1777ev_userdata (EV_P)
1778{
1779 return userdata;
1780}
1781
1782void
1783ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1784{
1785 invoke_cb = invoke_pending_cb;
1786}
1787
1788void
1789ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1790{
1791 release_cb = release;
1792 acquire_cb = acquire;
1793}
1794#endif
1795
1796/* initialise a loop structure, must be zero-initialised */
921static void noinline 1797static void noinline ecb_cold
922loop_init (EV_P_ unsigned int flags) 1798loop_init (EV_P_ unsigned int flags)
923{ 1799{
924 if (!backend) 1800 if (!backend)
925 { 1801 {
1802 origflags = flags;
1803
1804#if EV_USE_REALTIME
1805 if (!have_realtime)
1806 {
1807 struct timespec ts;
1808
1809 if (!clock_gettime (CLOCK_REALTIME, &ts))
1810 have_realtime = 1;
1811 }
1812#endif
1813
926#if EV_USE_MONOTONIC 1814#if EV_USE_MONOTONIC
1815 if (!have_monotonic)
927 { 1816 {
928 struct timespec ts; 1817 struct timespec ts;
1818
929 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1819 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
930 have_monotonic = 1; 1820 have_monotonic = 1;
931 } 1821 }
932#endif 1822#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 1823
939 /* pid check not overridable via env */ 1824 /* pid check not overridable via env */
940#ifndef _WIN32 1825#ifndef _WIN32
941 if (flags & EVFLAG_FORKCHECK) 1826 if (flags & EVFLAG_FORKCHECK)
942 curpid = getpid (); 1827 curpid = getpid ();
… …
945 if (!(flags & EVFLAG_NOENV) 1830 if (!(flags & EVFLAG_NOENV)
946 && !enable_secure () 1831 && !enable_secure ()
947 && getenv ("LIBEV_FLAGS")) 1832 && getenv ("LIBEV_FLAGS"))
948 flags = atoi (getenv ("LIBEV_FLAGS")); 1833 flags = atoi (getenv ("LIBEV_FLAGS"));
949 1834
950 if (!(flags & 0x0000ffffUL)) 1835 ev_rt_now = ev_time ();
1836 mn_now = get_clock ();
1837 now_floor = mn_now;
1838 rtmn_diff = ev_rt_now - mn_now;
1839#if EV_FEATURE_API
1840 invoke_cb = ev_invoke_pending;
1841#endif
1842
1843 io_blocktime = 0.;
1844 timeout_blocktime = 0.;
1845 backend = 0;
1846 backend_fd = -1;
1847 sig_pending = 0;
1848#if EV_ASYNC_ENABLE
1849 async_pending = 0;
1850#endif
1851 pipe_write_skipped = 0;
1852 pipe_write_wanted = 0;
1853#if EV_USE_INOTIFY
1854 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1855#endif
1856#if EV_USE_SIGNALFD
1857 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1858#endif
1859
1860 if (!(flags & EVBACKEND_MASK))
951 flags |= ev_recommended_backends (); 1861 flags |= ev_recommended_backends ();
952 1862
953 backend = 0;
954 backend_fd = -1;
955#if EV_USE_INOTIFY 1863#if EV_USE_IOCP
956 fs_fd = -2; 1864 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
957#endif 1865#endif
958
959#if EV_USE_PORT 1866#if EV_USE_PORT
960 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1867 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
961#endif 1868#endif
962#if EV_USE_KQUEUE 1869#if EV_USE_KQUEUE
963 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1870 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
970#endif 1877#endif
971#if EV_USE_SELECT 1878#if EV_USE_SELECT
972 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1879 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
973#endif 1880#endif
974 1881
1882 ev_prepare_init (&pending_w, pendingcb);
1883
1884#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
975 ev_init (&sigev, sigcb); 1885 ev_init (&pipe_w, pipecb);
976 ev_set_priority (&sigev, EV_MAXPRI); 1886 ev_set_priority (&pipe_w, EV_MAXPRI);
1887#endif
977 } 1888 }
978} 1889}
979 1890
980static void noinline 1891/* free up a loop structure */
1892void ecb_cold
981loop_destroy (EV_P) 1893ev_loop_destroy (EV_P)
982{ 1894{
983 int i; 1895 int i;
1896
1897#if EV_MULTIPLICITY
1898 /* mimic free (0) */
1899 if (!EV_A)
1900 return;
1901#endif
1902
1903#if EV_CLEANUP_ENABLE
1904 /* queue cleanup watchers (and execute them) */
1905 if (expect_false (cleanupcnt))
1906 {
1907 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1908 EV_INVOKE_PENDING;
1909 }
1910#endif
1911
1912#if EV_CHILD_ENABLE
1913 if (ev_is_active (&childev))
1914 {
1915 ev_ref (EV_A); /* child watcher */
1916 ev_signal_stop (EV_A_ &childev);
1917 }
1918#endif
1919
1920 if (ev_is_active (&pipe_w))
1921 {
1922 /*ev_ref (EV_A);*/
1923 /*ev_io_stop (EV_A_ &pipe_w);*/
1924
1925#if EV_USE_EVENTFD
1926 if (evfd >= 0)
1927 close (evfd);
1928#endif
1929
1930 if (evpipe [0] >= 0)
1931 {
1932 EV_WIN32_CLOSE_FD (evpipe [0]);
1933 EV_WIN32_CLOSE_FD (evpipe [1]);
1934 }
1935 }
1936
1937#if EV_USE_SIGNALFD
1938 if (ev_is_active (&sigfd_w))
1939 close (sigfd);
1940#endif
984 1941
985#if EV_USE_INOTIFY 1942#if EV_USE_INOTIFY
986 if (fs_fd >= 0) 1943 if (fs_fd >= 0)
987 close (fs_fd); 1944 close (fs_fd);
988#endif 1945#endif
989 1946
990 if (backend_fd >= 0) 1947 if (backend_fd >= 0)
991 close (backend_fd); 1948 close (backend_fd);
992 1949
1950#if EV_USE_IOCP
1951 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1952#endif
993#if EV_USE_PORT 1953#if EV_USE_PORT
994 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1954 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
995#endif 1955#endif
996#if EV_USE_KQUEUE 1956#if EV_USE_KQUEUE
997 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1957 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1012#if EV_IDLE_ENABLE 1972#if EV_IDLE_ENABLE
1013 array_free (idle, [i]); 1973 array_free (idle, [i]);
1014#endif 1974#endif
1015 } 1975 }
1016 1976
1977 ev_free (anfds); anfds = 0; anfdmax = 0;
1978
1017 /* have to use the microsoft-never-gets-it-right macro */ 1979 /* have to use the microsoft-never-gets-it-right macro */
1980 array_free (rfeed, EMPTY);
1018 array_free (fdchange, EMPTY); 1981 array_free (fdchange, EMPTY);
1019 array_free (timer, EMPTY); 1982 array_free (timer, EMPTY);
1020#if EV_PERIODIC_ENABLE 1983#if EV_PERIODIC_ENABLE
1021 array_free (periodic, EMPTY); 1984 array_free (periodic, EMPTY);
1022#endif 1985#endif
1986#if EV_FORK_ENABLE
1987 array_free (fork, EMPTY);
1988#endif
1989#if EV_CLEANUP_ENABLE
1990 array_free (cleanup, EMPTY);
1991#endif
1023 array_free (prepare, EMPTY); 1992 array_free (prepare, EMPTY);
1024 array_free (check, EMPTY); 1993 array_free (check, EMPTY);
1994#if EV_ASYNC_ENABLE
1995 array_free (async, EMPTY);
1996#endif
1025 1997
1026 backend = 0; 1998 backend = 0;
1027}
1028 1999
2000#if EV_MULTIPLICITY
2001 if (ev_is_default_loop (EV_A))
2002#endif
2003 ev_default_loop_ptr = 0;
2004#if EV_MULTIPLICITY
2005 else
2006 ev_free (EV_A);
2007#endif
2008}
2009
2010#if EV_USE_INOTIFY
1029void inline_size infy_fork (EV_P); 2011inline_size void infy_fork (EV_P);
2012#endif
1030 2013
1031void inline_size 2014inline_size void
1032loop_fork (EV_P) 2015loop_fork (EV_P)
1033{ 2016{
1034#if EV_USE_PORT 2017#if EV_USE_PORT
1035 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2018 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1036#endif 2019#endif
… …
1042#endif 2025#endif
1043#if EV_USE_INOTIFY 2026#if EV_USE_INOTIFY
1044 infy_fork (EV_A); 2027 infy_fork (EV_A);
1045#endif 2028#endif
1046 2029
1047 if (ev_is_active (&sigev)) 2030 if (ev_is_active (&pipe_w))
1048 { 2031 {
1049 /* default loop */ 2032 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1050 2033
1051 ev_ref (EV_A); 2034 ev_ref (EV_A);
1052 ev_io_stop (EV_A_ &sigev); 2035 ev_io_stop (EV_A_ &pipe_w);
1053 close (sigpipe [0]);
1054 close (sigpipe [1]);
1055 2036
1056 while (pipe (sigpipe)) 2037#if EV_USE_EVENTFD
1057 syserr ("(libev) error creating pipe"); 2038 if (evfd >= 0)
2039 close (evfd);
2040#endif
1058 2041
2042 if (evpipe [0] >= 0)
2043 {
2044 EV_WIN32_CLOSE_FD (evpipe [0]);
2045 EV_WIN32_CLOSE_FD (evpipe [1]);
2046 }
2047
2048#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1059 siginit (EV_A); 2049 evpipe_init (EV_A);
2050 /* now iterate over everything, in case we missed something */
2051 pipecb (EV_A_ &pipe_w, EV_READ);
2052#endif
1060 } 2053 }
1061 2054
1062 postfork = 0; 2055 postfork = 0;
1063} 2056}
1064 2057
1065#if EV_MULTIPLICITY 2058#if EV_MULTIPLICITY
2059
1066struct ev_loop * 2060struct ev_loop * ecb_cold
1067ev_loop_new (unsigned int flags) 2061ev_loop_new (unsigned int flags)
1068{ 2062{
1069 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2063 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1070 2064
1071 memset (loop, 0, sizeof (struct ev_loop)); 2065 memset (EV_A, 0, sizeof (struct ev_loop));
1072
1073 loop_init (EV_A_ flags); 2066 loop_init (EV_A_ flags);
1074 2067
1075 if (ev_backend (EV_A)) 2068 if (ev_backend (EV_A))
1076 return loop; 2069 return EV_A;
1077 2070
2071 ev_free (EV_A);
1078 return 0; 2072 return 0;
1079} 2073}
1080 2074
1081void 2075#endif /* multiplicity */
1082ev_loop_destroy (EV_P)
1083{
1084 loop_destroy (EV_A);
1085 ev_free (loop);
1086}
1087 2076
1088void 2077#if EV_VERIFY
1089ev_loop_fork (EV_P) 2078static void noinline ecb_cold
2079verify_watcher (EV_P_ W w)
1090{ 2080{
1091 postfork = 1; 2081 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1092}
1093 2082
2083 if (w->pending)
2084 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2085}
2086
2087static void noinline ecb_cold
2088verify_heap (EV_P_ ANHE *heap, int N)
2089{
2090 int i;
2091
2092 for (i = HEAP0; i < N + HEAP0; ++i)
2093 {
2094 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2095 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2096 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2097
2098 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2099 }
2100}
2101
2102static void noinline ecb_cold
2103array_verify (EV_P_ W *ws, int cnt)
2104{
2105 while (cnt--)
2106 {
2107 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2108 verify_watcher (EV_A_ ws [cnt]);
2109 }
2110}
2111#endif
2112
2113#if EV_FEATURE_API
2114void ecb_cold
2115ev_verify (EV_P)
2116{
2117#if EV_VERIFY
2118 int i;
2119 WL w;
2120
2121 assert (activecnt >= -1);
2122
2123 assert (fdchangemax >= fdchangecnt);
2124 for (i = 0; i < fdchangecnt; ++i)
2125 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2126
2127 assert (anfdmax >= 0);
2128 for (i = 0; i < anfdmax; ++i)
2129 for (w = anfds [i].head; w; w = w->next)
2130 {
2131 verify_watcher (EV_A_ (W)w);
2132 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2133 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2134 }
2135
2136 assert (timermax >= timercnt);
2137 verify_heap (EV_A_ timers, timercnt);
2138
2139#if EV_PERIODIC_ENABLE
2140 assert (periodicmax >= periodiccnt);
2141 verify_heap (EV_A_ periodics, periodiccnt);
2142#endif
2143
2144 for (i = NUMPRI; i--; )
2145 {
2146 assert (pendingmax [i] >= pendingcnt [i]);
2147#if EV_IDLE_ENABLE
2148 assert (idleall >= 0);
2149 assert (idlemax [i] >= idlecnt [i]);
2150 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2151#endif
2152 }
2153
2154#if EV_FORK_ENABLE
2155 assert (forkmax >= forkcnt);
2156 array_verify (EV_A_ (W *)forks, forkcnt);
2157#endif
2158
2159#if EV_CLEANUP_ENABLE
2160 assert (cleanupmax >= cleanupcnt);
2161 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2162#endif
2163
2164#if EV_ASYNC_ENABLE
2165 assert (asyncmax >= asynccnt);
2166 array_verify (EV_A_ (W *)asyncs, asynccnt);
2167#endif
2168
2169#if EV_PREPARE_ENABLE
2170 assert (preparemax >= preparecnt);
2171 array_verify (EV_A_ (W *)prepares, preparecnt);
2172#endif
2173
2174#if EV_CHECK_ENABLE
2175 assert (checkmax >= checkcnt);
2176 array_verify (EV_A_ (W *)checks, checkcnt);
2177#endif
2178
2179# if 0
2180#if EV_CHILD_ENABLE
2181 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2182 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2183#endif
2184# endif
2185#endif
2186}
1094#endif 2187#endif
1095 2188
1096#if EV_MULTIPLICITY 2189#if EV_MULTIPLICITY
1097struct ev_loop * 2190struct ev_loop * ecb_cold
1098ev_default_loop_init (unsigned int flags)
1099#else 2191#else
1100int 2192int
2193#endif
1101ev_default_loop (unsigned int flags) 2194ev_default_loop (unsigned int flags)
1102#endif
1103{ 2195{
1104 if (sigpipe [0] == sigpipe [1])
1105 if (pipe (sigpipe))
1106 return 0;
1107
1108 if (!ev_default_loop_ptr) 2196 if (!ev_default_loop_ptr)
1109 { 2197 {
1110#if EV_MULTIPLICITY 2198#if EV_MULTIPLICITY
1111 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2199 EV_P = ev_default_loop_ptr = &default_loop_struct;
1112#else 2200#else
1113 ev_default_loop_ptr = 1; 2201 ev_default_loop_ptr = 1;
1114#endif 2202#endif
1115 2203
1116 loop_init (EV_A_ flags); 2204 loop_init (EV_A_ flags);
1117 2205
1118 if (ev_backend (EV_A)) 2206 if (ev_backend (EV_A))
1119 { 2207 {
1120 siginit (EV_A); 2208#if EV_CHILD_ENABLE
1121
1122#ifndef _WIN32
1123 ev_signal_init (&childev, childcb, SIGCHLD); 2209 ev_signal_init (&childev, childcb, SIGCHLD);
1124 ev_set_priority (&childev, EV_MAXPRI); 2210 ev_set_priority (&childev, EV_MAXPRI);
1125 ev_signal_start (EV_A_ &childev); 2211 ev_signal_start (EV_A_ &childev);
1126 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2212 ev_unref (EV_A); /* child watcher should not keep loop alive */
1127#endif 2213#endif
… …
1132 2218
1133 return ev_default_loop_ptr; 2219 return ev_default_loop_ptr;
1134} 2220}
1135 2221
1136void 2222void
1137ev_default_destroy (void) 2223ev_loop_fork (EV_P)
1138{ 2224{
1139#if EV_MULTIPLICITY 2225 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} 2226}
1167 2227
1168/*****************************************************************************/ 2228/*****************************************************************************/
1169 2229
1170void 2230void
1171ev_invoke (EV_P_ void *w, int revents) 2231ev_invoke (EV_P_ void *w, int revents)
1172{ 2232{
1173 EV_CB_INVOKE ((W)w, revents); 2233 EV_CB_INVOKE ((W)w, revents);
1174} 2234}
1175 2235
1176void inline_speed 2236unsigned int
1177call_pending (EV_P) 2237ev_pending_count (EV_P)
2238{
2239 int pri;
2240 unsigned int count = 0;
2241
2242 for (pri = NUMPRI; pri--; )
2243 count += pendingcnt [pri];
2244
2245 return count;
2246}
2247
2248void noinline
2249ev_invoke_pending (EV_P)
1178{ 2250{
1179 int pri; 2251 int pri;
1180 2252
1181 for (pri = NUMPRI; pri--; ) 2253 for (pri = NUMPRI; pri--; )
1182 while (pendingcnt [pri]) 2254 while (pendingcnt [pri])
1183 { 2255 {
1184 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2256 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1185 2257
1186 if (expect_true (p->w))
1187 {
1188 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1189
1190 p->w->pending = 0; 2258 p->w->pending = 0;
1191 EV_CB_INVOKE (p->w, p->events); 2259 EV_CB_INVOKE (p->w, p->events);
1192 } 2260 EV_FREQUENT_CHECK;
1193 } 2261 }
1194} 2262}
1195 2263
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 2264#if EV_IDLE_ENABLE
1276void inline_size 2265/* make idle watchers pending. this handles the "call-idle */
2266/* only when higher priorities are idle" logic */
2267inline_size void
1277idle_reify (EV_P) 2268idle_reify (EV_P)
1278{ 2269{
1279 if (expect_false (idleall)) 2270 if (expect_false (idleall))
1280 { 2271 {
1281 int pri; 2272 int pri;
… …
1293 } 2284 }
1294 } 2285 }
1295} 2286}
1296#endif 2287#endif
1297 2288
1298int inline_size 2289/* make timers pending */
1299time_update_monotonic (EV_P) 2290inline_size void
2291timers_reify (EV_P)
1300{ 2292{
2293 EV_FREQUENT_CHECK;
2294
2295 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2296 {
2297 do
2298 {
2299 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2300
2301 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2302
2303 /* first reschedule or stop timer */
2304 if (w->repeat)
2305 {
2306 ev_at (w) += w->repeat;
2307 if (ev_at (w) < mn_now)
2308 ev_at (w) = mn_now;
2309
2310 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2311
2312 ANHE_at_cache (timers [HEAP0]);
2313 downheap (timers, timercnt, HEAP0);
2314 }
2315 else
2316 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2317
2318 EV_FREQUENT_CHECK;
2319 feed_reverse (EV_A_ (W)w);
2320 }
2321 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2322
2323 feed_reverse_done (EV_A_ EV_TIMER);
2324 }
2325}
2326
2327#if EV_PERIODIC_ENABLE
2328
2329static void noinline
2330periodic_recalc (EV_P_ ev_periodic *w)
2331{
2332 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2333 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2334
2335 /* the above almost always errs on the low side */
2336 while (at <= ev_rt_now)
2337 {
2338 ev_tstamp nat = at + w->interval;
2339
2340 /* when resolution fails us, we use ev_rt_now */
2341 if (expect_false (nat == at))
2342 {
2343 at = ev_rt_now;
2344 break;
2345 }
2346
2347 at = nat;
2348 }
2349
2350 ev_at (w) = at;
2351}
2352
2353/* make periodics pending */
2354inline_size void
2355periodics_reify (EV_P)
2356{
2357 EV_FREQUENT_CHECK;
2358
2359 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2360 {
2361 int feed_count = 0;
2362
2363 do
2364 {
2365 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2366
2367 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2368
2369 /* first reschedule or stop timer */
2370 if (w->reschedule_cb)
2371 {
2372 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2373
2374 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2375
2376 ANHE_at_cache (periodics [HEAP0]);
2377 downheap (periodics, periodiccnt, HEAP0);
2378 }
2379 else if (w->interval)
2380 {
2381 periodic_recalc (EV_A_ w);
2382 ANHE_at_cache (periodics [HEAP0]);
2383 downheap (periodics, periodiccnt, HEAP0);
2384 }
2385 else
2386 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2387
2388 EV_FREQUENT_CHECK;
2389 feed_reverse (EV_A_ (W)w);
2390 }
2391 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2392
2393 feed_reverse_done (EV_A_ EV_PERIODIC);
2394 }
2395}
2396
2397/* simply recalculate all periodics */
2398/* TODO: maybe ensure that at least one event happens when jumping forward? */
2399static void noinline ecb_cold
2400periodics_reschedule (EV_P)
2401{
2402 int i;
2403
2404 /* adjust periodics after time jump */
2405 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2406 {
2407 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2408
2409 if (w->reschedule_cb)
2410 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2411 else if (w->interval)
2412 periodic_recalc (EV_A_ w);
2413
2414 ANHE_at_cache (periodics [i]);
2415 }
2416
2417 reheap (periodics, periodiccnt);
2418}
2419#endif
2420
2421/* adjust all timers by a given offset */
2422static void noinline ecb_cold
2423timers_reschedule (EV_P_ ev_tstamp adjust)
2424{
2425 int i;
2426
2427 for (i = 0; i < timercnt; ++i)
2428 {
2429 ANHE *he = timers + i + HEAP0;
2430 ANHE_w (*he)->at += adjust;
2431 ANHE_at_cache (*he);
2432 }
2433}
2434
2435/* fetch new monotonic and realtime times from the kernel */
2436/* also detect if there was a timejump, and act accordingly */
2437inline_speed void
2438time_update (EV_P_ ev_tstamp max_block)
2439{
2440#if EV_USE_MONOTONIC
2441 if (expect_true (have_monotonic))
2442 {
2443 int i;
2444 ev_tstamp odiff = rtmn_diff;
2445
1301 mn_now = get_clock (); 2446 mn_now = get_clock ();
1302 2447
2448 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2449 /* interpolate in the meantime */
1303 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2450 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1304 { 2451 {
1305 ev_rt_now = rtmn_diff + mn_now; 2452 ev_rt_now = rtmn_diff + mn_now;
1306 return 0; 2453 return;
1307 } 2454 }
1308 else 2455
1309 {
1310 now_floor = mn_now; 2456 now_floor = mn_now;
1311 ev_rt_now = ev_time (); 2457 ev_rt_now = ev_time ();
1312 return 1;
1313 }
1314}
1315 2458
1316void inline_size 2459 /* loop a few times, before making important decisions.
1317time_update (EV_P) 2460 * on the choice of "4": one iteration isn't enough,
1318{ 2461 * in case we get preempted during the calls to
1319 int i; 2462 * ev_time and get_clock. a second call is almost guaranteed
1320 2463 * to succeed in that case, though. and looping a few more times
1321#if EV_USE_MONOTONIC 2464 * doesn't hurt either as we only do this on time-jumps or
1322 if (expect_true (have_monotonic)) 2465 * in the unlikely event of having been preempted here.
1323 { 2466 */
1324 if (time_update_monotonic (EV_A)) 2467 for (i = 4; --i; )
1325 { 2468 {
1326 ev_tstamp odiff = rtmn_diff; 2469 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; 2470 rtmn_diff = ev_rt_now - mn_now;
1339 2471
1340 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2472 diff = odiff - rtmn_diff;
2473
2474 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1341 return; /* all is well */ 2475 return; /* all is well */
1342 2476
1343 ev_rt_now = ev_time (); 2477 ev_rt_now = ev_time ();
1344 mn_now = get_clock (); 2478 mn_now = get_clock ();
1345 now_floor = mn_now; 2479 now_floor = mn_now;
1346 } 2480 }
1347 2481
2482 /* no timer adjustment, as the monotonic clock doesn't jump */
2483 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1348# if EV_PERIODIC_ENABLE 2484# if EV_PERIODIC_ENABLE
1349 periodics_reschedule (EV_A); 2485 periodics_reschedule (EV_A);
1350# endif 2486# endif
1351 /* no timer adjustment, as the monotonic clock doesn't jump */
1352 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1353 }
1354 } 2487 }
1355 else 2488 else
1356#endif 2489#endif
1357 { 2490 {
1358 ev_rt_now = ev_time (); 2491 ev_rt_now = ev_time ();
1359 2492
1360 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2493 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1361 { 2494 {
2495 /* adjust timers. this is easy, as the offset is the same for all of them */
2496 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1362#if EV_PERIODIC_ENABLE 2497#if EV_PERIODIC_ENABLE
1363 periodics_reschedule (EV_A); 2498 periodics_reschedule (EV_A);
1364#endif 2499#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 } 2500 }
1370 2501
1371 mn_now = ev_rt_now; 2502 mn_now = ev_rt_now;
1372 } 2503 }
1373} 2504}
1374 2505
1375void 2506void
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) 2507ev_run (EV_P_ int flags)
1391{ 2508{
1392 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2509#if EV_FEATURE_API
1393 ? EVUNLOOP_ONE 2510 ++loop_depth;
1394 : EVUNLOOP_CANCEL; 2511#endif
1395 2512
2513 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2514
2515 loop_done = EVBREAK_CANCEL;
2516
1396 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2517 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1397 2518
1398 do 2519 do
1399 { 2520 {
2521#if EV_VERIFY >= 2
2522 ev_verify (EV_A);
2523#endif
2524
1400#ifndef _WIN32 2525#ifndef _WIN32
1401 if (expect_false (curpid)) /* penalise the forking check even more */ 2526 if (expect_false (curpid)) /* penalise the forking check even more */
1402 if (expect_false (getpid () != curpid)) 2527 if (expect_false (getpid () != curpid))
1403 { 2528 {
1404 curpid = getpid (); 2529 curpid = getpid ();
… …
1410 /* we might have forked, so queue fork handlers */ 2535 /* we might have forked, so queue fork handlers */
1411 if (expect_false (postfork)) 2536 if (expect_false (postfork))
1412 if (forkcnt) 2537 if (forkcnt)
1413 { 2538 {
1414 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2539 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1415 call_pending (EV_A); 2540 EV_INVOKE_PENDING;
1416 } 2541 }
1417#endif 2542#endif
1418 2543
2544#if EV_PREPARE_ENABLE
1419 /* queue check watchers (and execute them) */ 2545 /* queue prepare watchers (and execute them) */
1420 if (expect_false (preparecnt)) 2546 if (expect_false (preparecnt))
1421 { 2547 {
1422 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2548 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1423 call_pending (EV_A); 2549 EV_INVOKE_PENDING;
1424 } 2550 }
2551#endif
1425 2552
1426 if (expect_false (!activecnt)) 2553 if (expect_false (loop_done))
1427 break; 2554 break;
1428 2555
1429 /* we might have forked, so reify kernel state if necessary */ 2556 /* we might have forked, so reify kernel state if necessary */
1430 if (expect_false (postfork)) 2557 if (expect_false (postfork))
1431 loop_fork (EV_A); 2558 loop_fork (EV_A);
… …
1433 /* update fd-related kernel structures */ 2560 /* update fd-related kernel structures */
1434 fd_reify (EV_A); 2561 fd_reify (EV_A);
1435 2562
1436 /* calculate blocking time */ 2563 /* calculate blocking time */
1437 { 2564 {
1438 ev_tstamp block; 2565 ev_tstamp waittime = 0.;
2566 ev_tstamp sleeptime = 0.;
1439 2567
1440 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2568 /* remember old timestamp for io_blocktime calculation */
1441 block = 0.; /* do not block at all */ 2569 ev_tstamp prev_mn_now = mn_now;
1442 else 2570
2571 /* update time to cancel out callback processing overhead */
2572 time_update (EV_A_ 1e100);
2573
2574 /* from now on, we want a pipe-wake-up */
2575 pipe_write_wanted = 1;
2576
2577 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1443 { 2578 {
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; 2579 waittime = MAX_BLOCKTIME;
1456 2580
1457 if (timercnt) 2581 if (timercnt)
1458 { 2582 {
1459 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2583 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1460 if (block > to) block = to; 2584 if (waittime > to) waittime = to;
1461 } 2585 }
1462 2586
1463#if EV_PERIODIC_ENABLE 2587#if EV_PERIODIC_ENABLE
1464 if (periodiccnt) 2588 if (periodiccnt)
1465 { 2589 {
1466 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2590 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1467 if (block > to) block = to; 2591 if (waittime > to) waittime = to;
1468 } 2592 }
1469#endif 2593#endif
1470 2594
2595 /* don't let timeouts decrease the waittime below timeout_blocktime */
2596 if (expect_false (waittime < timeout_blocktime))
2597 waittime = timeout_blocktime;
2598
2599 /* at this point, we NEED to wait, so we have to ensure */
2600 /* to pass a minimum nonzero value to the backend */
2601 if (expect_false (waittime < backend_mintime))
2602 waittime = backend_mintime;
2603
2604 /* extra check because io_blocktime is commonly 0 */
1471 if (expect_false (block < 0.)) block = 0.; 2605 if (expect_false (io_blocktime))
2606 {
2607 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2608
2609 if (sleeptime > waittime - backend_mintime)
2610 sleeptime = waittime - backend_mintime;
2611
2612 if (expect_true (sleeptime > 0.))
2613 {
2614 ev_sleep (sleeptime);
2615 waittime -= sleeptime;
2616 }
2617 }
1472 } 2618 }
1473 2619
2620#if EV_FEATURE_API
1474 ++loop_count; 2621 ++loop_count;
2622#endif
2623 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1475 backend_poll (EV_A_ block); 2624 backend_poll (EV_A_ waittime);
2625 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2626
2627 pipe_write_wanted = 0;
2628
2629 if (pipe_write_skipped)
2630 {
2631 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2632 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2633 }
2634
2635
2636 /* update ev_rt_now, do magic */
2637 time_update (EV_A_ waittime + sleeptime);
1476 } 2638 }
1477
1478 /* update ev_rt_now, do magic */
1479 time_update (EV_A);
1480 2639
1481 /* queue pending timers and reschedule them */ 2640 /* queue pending timers and reschedule them */
1482 timers_reify (EV_A); /* relative timers called last */ 2641 timers_reify (EV_A); /* relative timers called last */
1483#if EV_PERIODIC_ENABLE 2642#if EV_PERIODIC_ENABLE
1484 periodics_reify (EV_A); /* absolute timers called first */ 2643 periodics_reify (EV_A); /* absolute timers called first */
… …
1487#if EV_IDLE_ENABLE 2646#if EV_IDLE_ENABLE
1488 /* queue idle watchers unless other events are pending */ 2647 /* queue idle watchers unless other events are pending */
1489 idle_reify (EV_A); 2648 idle_reify (EV_A);
1490#endif 2649#endif
1491 2650
2651#if EV_CHECK_ENABLE
1492 /* queue check watchers, to be executed first */ 2652 /* queue check watchers, to be executed first */
1493 if (expect_false (checkcnt)) 2653 if (expect_false (checkcnt))
1494 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2654 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2655#endif
1495 2656
1496 call_pending (EV_A); 2657 EV_INVOKE_PENDING;
1497
1498 } 2658 }
1499 while (expect_true (activecnt && !loop_done)); 2659 while (expect_true (
2660 activecnt
2661 && !loop_done
2662 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2663 ));
1500 2664
1501 if (loop_done == EVUNLOOP_ONE) 2665 if (loop_done == EVBREAK_ONE)
1502 loop_done = EVUNLOOP_CANCEL; 2666 loop_done = EVBREAK_CANCEL;
2667
2668#if EV_FEATURE_API
2669 --loop_depth;
2670#endif
1503} 2671}
1504 2672
1505void 2673void
1506ev_unloop (EV_P_ int how) 2674ev_break (EV_P_ int how)
1507{ 2675{
1508 loop_done = how; 2676 loop_done = how;
1509} 2677}
1510 2678
2679void
2680ev_ref (EV_P)
2681{
2682 ++activecnt;
2683}
2684
2685void
2686ev_unref (EV_P)
2687{
2688 --activecnt;
2689}
2690
2691void
2692ev_now_update (EV_P)
2693{
2694 time_update (EV_A_ 1e100);
2695}
2696
2697void
2698ev_suspend (EV_P)
2699{
2700 ev_now_update (EV_A);
2701}
2702
2703void
2704ev_resume (EV_P)
2705{
2706 ev_tstamp mn_prev = mn_now;
2707
2708 ev_now_update (EV_A);
2709 timers_reschedule (EV_A_ mn_now - mn_prev);
2710#if EV_PERIODIC_ENABLE
2711 /* TODO: really do this? */
2712 periodics_reschedule (EV_A);
2713#endif
2714}
2715
1511/*****************************************************************************/ 2716/*****************************************************************************/
2717/* singly-linked list management, used when the expected list length is short */
1512 2718
1513void inline_size 2719inline_size void
1514wlist_add (WL *head, WL elem) 2720wlist_add (WL *head, WL elem)
1515{ 2721{
1516 elem->next = *head; 2722 elem->next = *head;
1517 *head = elem; 2723 *head = elem;
1518} 2724}
1519 2725
1520void inline_size 2726inline_size void
1521wlist_del (WL *head, WL elem) 2727wlist_del (WL *head, WL elem)
1522{ 2728{
1523 while (*head) 2729 while (*head)
1524 { 2730 {
1525 if (*head == elem) 2731 if (expect_true (*head == elem))
1526 { 2732 {
1527 *head = elem->next; 2733 *head = elem->next;
1528 return; 2734 break;
1529 } 2735 }
1530 2736
1531 head = &(*head)->next; 2737 head = &(*head)->next;
1532 } 2738 }
1533} 2739}
1534 2740
1535void inline_speed 2741/* internal, faster, version of ev_clear_pending */
2742inline_speed void
1536clear_pending (EV_P_ W w) 2743clear_pending (EV_P_ W w)
1537{ 2744{
1538 if (w->pending) 2745 if (w->pending)
1539 { 2746 {
1540 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2747 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1541 w->pending = 0; 2748 w->pending = 0;
1542 } 2749 }
1543} 2750}
1544 2751
1545int 2752int
1546ev_clear_pending (EV_P_ void *w) 2753ev_clear_pending (EV_P_ void *w)
1547{ 2754{
1548 W w_ = (W)w; 2755 W w_ = (W)w;
1549 int pending = w_->pending; 2756 int pending = w_->pending;
1550 2757
1551 if (!pending) 2758 if (expect_true (pending))
2759 {
2760 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2761 p->w = (W)&pending_w;
2762 w_->pending = 0;
2763 return p->events;
2764 }
2765 else
1552 return 0; 2766 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} 2767}
1560 2768
1561void inline_size 2769inline_size void
1562pri_adjust (EV_P_ W w) 2770pri_adjust (EV_P_ W w)
1563{ 2771{
1564 int pri = w->priority; 2772 int pri = ev_priority (w);
1565 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2773 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1566 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2774 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1567 w->priority = pri; 2775 ev_set_priority (w, pri);
1568} 2776}
1569 2777
1570void inline_speed 2778inline_speed void
1571ev_start (EV_P_ W w, int active) 2779ev_start (EV_P_ W w, int active)
1572{ 2780{
1573 pri_adjust (EV_A_ w); 2781 pri_adjust (EV_A_ w);
1574 w->active = active; 2782 w->active = active;
1575 ev_ref (EV_A); 2783 ev_ref (EV_A);
1576} 2784}
1577 2785
1578void inline_size 2786inline_size void
1579ev_stop (EV_P_ W w) 2787ev_stop (EV_P_ W w)
1580{ 2788{
1581 ev_unref (EV_A); 2789 ev_unref (EV_A);
1582 w->active = 0; 2790 w->active = 0;
1583} 2791}
1584 2792
1585/*****************************************************************************/ 2793/*****************************************************************************/
1586 2794
1587void 2795void noinline
1588ev_io_start (EV_P_ ev_io *w) 2796ev_io_start (EV_P_ ev_io *w)
1589{ 2797{
1590 int fd = w->fd; 2798 int fd = w->fd;
1591 2799
1592 if (expect_false (ev_is_active (w))) 2800 if (expect_false (ev_is_active (w)))
1593 return; 2801 return;
1594 2802
1595 assert (("ev_io_start called with negative fd", fd >= 0)); 2803 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2804 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2805
2806 EV_FREQUENT_CHECK;
1596 2807
1597 ev_start (EV_A_ (W)w, 1); 2808 ev_start (EV_A_ (W)w, 1);
1598 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2809 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1599 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2810 wlist_add (&anfds[fd].head, (WL)w);
1600 2811
1601 fd_change (EV_A_ fd); 2812 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1602} 2813 w->events &= ~EV__IOFDSET;
1603 2814
1604void 2815 EV_FREQUENT_CHECK;
2816}
2817
2818void noinline
1605ev_io_stop (EV_P_ ev_io *w) 2819ev_io_stop (EV_P_ ev_io *w)
1606{ 2820{
1607 clear_pending (EV_A_ (W)w); 2821 clear_pending (EV_A_ (W)w);
1608 if (expect_false (!ev_is_active (w))) 2822 if (expect_false (!ev_is_active (w)))
1609 return; 2823 return;
1610 2824
1611 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2825 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1612 2826
2827 EV_FREQUENT_CHECK;
2828
1613 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2829 wlist_del (&anfds[w->fd].head, (WL)w);
1614 ev_stop (EV_A_ (W)w); 2830 ev_stop (EV_A_ (W)w);
1615 2831
1616 fd_change (EV_A_ w->fd); 2832 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1617}
1618 2833
1619void 2834 EV_FREQUENT_CHECK;
2835}
2836
2837void noinline
1620ev_timer_start (EV_P_ ev_timer *w) 2838ev_timer_start (EV_P_ ev_timer *w)
1621{ 2839{
1622 if (expect_false (ev_is_active (w))) 2840 if (expect_false (ev_is_active (w)))
1623 return; 2841 return;
1624 2842
1625 ((WT)w)->at += mn_now; 2843 ev_at (w) += mn_now;
1626 2844
1627 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2845 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1628 2846
2847 EV_FREQUENT_CHECK;
2848
2849 ++timercnt;
1629 ev_start (EV_A_ (W)w, ++timercnt); 2850 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1630 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2851 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1631 timers [timercnt - 1] = w; 2852 ANHE_w (timers [ev_active (w)]) = (WT)w;
1632 upheap ((WT *)timers, timercnt - 1); 2853 ANHE_at_cache (timers [ev_active (w)]);
2854 upheap (timers, ev_active (w));
1633 2855
2856 EV_FREQUENT_CHECK;
2857
1634 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2858 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1635} 2859}
1636 2860
1637void 2861void noinline
1638ev_timer_stop (EV_P_ ev_timer *w) 2862ev_timer_stop (EV_P_ ev_timer *w)
1639{ 2863{
1640 clear_pending (EV_A_ (W)w); 2864 clear_pending (EV_A_ (W)w);
1641 if (expect_false (!ev_is_active (w))) 2865 if (expect_false (!ev_is_active (w)))
1642 return; 2866 return;
1643 2867
1644 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2868 EV_FREQUENT_CHECK;
1645 2869
1646 { 2870 {
1647 int active = ((W)w)->active; 2871 int active = ev_active (w);
1648 2872
2873 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2874
2875 --timercnt;
2876
1649 if (expect_true (--active < --timercnt)) 2877 if (expect_true (active < timercnt + HEAP0))
1650 { 2878 {
1651 timers [active] = timers [timercnt]; 2879 timers [active] = timers [timercnt + HEAP0];
1652 adjustheap ((WT *)timers, timercnt, active); 2880 adjustheap (timers, timercnt, active);
1653 } 2881 }
1654 } 2882 }
1655 2883
1656 ((WT)w)->at -= mn_now; 2884 ev_at (w) -= mn_now;
1657 2885
1658 ev_stop (EV_A_ (W)w); 2886 ev_stop (EV_A_ (W)w);
1659}
1660 2887
1661void 2888 EV_FREQUENT_CHECK;
2889}
2890
2891void noinline
1662ev_timer_again (EV_P_ ev_timer *w) 2892ev_timer_again (EV_P_ ev_timer *w)
1663{ 2893{
2894 EV_FREQUENT_CHECK;
2895
1664 if (ev_is_active (w)) 2896 if (ev_is_active (w))
1665 { 2897 {
1666 if (w->repeat) 2898 if (w->repeat)
1667 { 2899 {
1668 ((WT)w)->at = mn_now + w->repeat; 2900 ev_at (w) = mn_now + w->repeat;
2901 ANHE_at_cache (timers [ev_active (w)]);
1669 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2902 adjustheap (timers, timercnt, ev_active (w));
1670 } 2903 }
1671 else 2904 else
1672 ev_timer_stop (EV_A_ w); 2905 ev_timer_stop (EV_A_ w);
1673 } 2906 }
1674 else if (w->repeat) 2907 else if (w->repeat)
1675 { 2908 {
1676 w->at = w->repeat; 2909 ev_at (w) = w->repeat;
1677 ev_timer_start (EV_A_ w); 2910 ev_timer_start (EV_A_ w);
1678 } 2911 }
2912
2913 EV_FREQUENT_CHECK;
2914}
2915
2916ev_tstamp
2917ev_timer_remaining (EV_P_ ev_timer *w)
2918{
2919 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1679} 2920}
1680 2921
1681#if EV_PERIODIC_ENABLE 2922#if EV_PERIODIC_ENABLE
1682void 2923void noinline
1683ev_periodic_start (EV_P_ ev_periodic *w) 2924ev_periodic_start (EV_P_ ev_periodic *w)
1684{ 2925{
1685 if (expect_false (ev_is_active (w))) 2926 if (expect_false (ev_is_active (w)))
1686 return; 2927 return;
1687 2928
1688 if (w->reschedule_cb) 2929 if (w->reschedule_cb)
1689 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2930 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1690 else if (w->interval) 2931 else if (w->interval)
1691 { 2932 {
1692 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2933 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 */ 2934 periodic_recalc (EV_A_ w);
1694 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1695 } 2935 }
2936 else
2937 ev_at (w) = w->offset;
1696 2938
2939 EV_FREQUENT_CHECK;
2940
2941 ++periodiccnt;
1697 ev_start (EV_A_ (W)w, ++periodiccnt); 2942 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1698 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2943 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1699 periodics [periodiccnt - 1] = w; 2944 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1700 upheap ((WT *)periodics, periodiccnt - 1); 2945 ANHE_at_cache (periodics [ev_active (w)]);
2946 upheap (periodics, ev_active (w));
1701 2947
2948 EV_FREQUENT_CHECK;
2949
1702 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2950 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1703} 2951}
1704 2952
1705void 2953void noinline
1706ev_periodic_stop (EV_P_ ev_periodic *w) 2954ev_periodic_stop (EV_P_ ev_periodic *w)
1707{ 2955{
1708 clear_pending (EV_A_ (W)w); 2956 clear_pending (EV_A_ (W)w);
1709 if (expect_false (!ev_is_active (w))) 2957 if (expect_false (!ev_is_active (w)))
1710 return; 2958 return;
1711 2959
1712 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2960 EV_FREQUENT_CHECK;
1713 2961
1714 { 2962 {
1715 int active = ((W)w)->active; 2963 int active = ev_active (w);
1716 2964
2965 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2966
2967 --periodiccnt;
2968
1717 if (expect_true (--active < --periodiccnt)) 2969 if (expect_true (active < periodiccnt + HEAP0))
1718 { 2970 {
1719 periodics [active] = periodics [periodiccnt]; 2971 periodics [active] = periodics [periodiccnt + HEAP0];
1720 adjustheap ((WT *)periodics, periodiccnt, active); 2972 adjustheap (periodics, periodiccnt, active);
1721 } 2973 }
1722 } 2974 }
1723 2975
1724 ev_stop (EV_A_ (W)w); 2976 ev_stop (EV_A_ (W)w);
1725}
1726 2977
1727void 2978 EV_FREQUENT_CHECK;
2979}
2980
2981void noinline
1728ev_periodic_again (EV_P_ ev_periodic *w) 2982ev_periodic_again (EV_P_ ev_periodic *w)
1729{ 2983{
1730 /* TODO: use adjustheap and recalculation */ 2984 /* TODO: use adjustheap and recalculation */
1731 ev_periodic_stop (EV_A_ w); 2985 ev_periodic_stop (EV_A_ w);
1732 ev_periodic_start (EV_A_ w); 2986 ev_periodic_start (EV_A_ w);
… …
1735 2989
1736#ifndef SA_RESTART 2990#ifndef SA_RESTART
1737# define SA_RESTART 0 2991# define SA_RESTART 0
1738#endif 2992#endif
1739 2993
1740void 2994#if EV_SIGNAL_ENABLE
2995
2996void noinline
1741ev_signal_start (EV_P_ ev_signal *w) 2997ev_signal_start (EV_P_ ev_signal *w)
1742{ 2998{
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))) 2999 if (expect_false (ev_is_active (w)))
1747 return; 3000 return;
1748 3001
1749 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3002 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3003
3004#if EV_MULTIPLICITY
3005 assert (("libev: a signal must not be attached to two different loops",
3006 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3007
3008 signals [w->signum - 1].loop = EV_A;
3009#endif
3010
3011 EV_FREQUENT_CHECK;
3012
3013#if EV_USE_SIGNALFD
3014 if (sigfd == -2)
3015 {
3016 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3017 if (sigfd < 0 && errno == EINVAL)
3018 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3019
3020 if (sigfd >= 0)
3021 {
3022 fd_intern (sigfd); /* doing it twice will not hurt */
3023
3024 sigemptyset (&sigfd_set);
3025
3026 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3027 ev_set_priority (&sigfd_w, EV_MAXPRI);
3028 ev_io_start (EV_A_ &sigfd_w);
3029 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3030 }
3031 }
3032
3033 if (sigfd >= 0)
3034 {
3035 /* TODO: check .head */
3036 sigaddset (&sigfd_set, w->signum);
3037 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3038
3039 signalfd (sigfd, &sigfd_set, 0);
3040 }
3041#endif
1750 3042
1751 ev_start (EV_A_ (W)w, 1); 3043 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); 3044 wlist_add (&signals [w->signum - 1].head, (WL)w);
1754 3045
1755 if (!((WL)w)->next) 3046 if (!((WL)w)->next)
3047# if EV_USE_SIGNALFD
3048 if (sigfd < 0) /*TODO*/
3049# endif
1756 { 3050 {
1757#if _WIN32 3051# ifdef _WIN32
3052 evpipe_init (EV_A);
3053
1758 signal (w->signum, sighandler); 3054 signal (w->signum, ev_sighandler);
1759#else 3055# else
1760 struct sigaction sa; 3056 struct sigaction sa;
3057
3058 evpipe_init (EV_A);
3059
1761 sa.sa_handler = sighandler; 3060 sa.sa_handler = ev_sighandler;
1762 sigfillset (&sa.sa_mask); 3061 sigfillset (&sa.sa_mask);
1763 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3062 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1764 sigaction (w->signum, &sa, 0); 3063 sigaction (w->signum, &sa, 0);
3064
3065 if (origflags & EVFLAG_NOSIGMASK)
3066 {
3067 sigemptyset (&sa.sa_mask);
3068 sigaddset (&sa.sa_mask, w->signum);
3069 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3070 }
1765#endif 3071#endif
1766 } 3072 }
1767}
1768 3073
1769void 3074 EV_FREQUENT_CHECK;
3075}
3076
3077void noinline
1770ev_signal_stop (EV_P_ ev_signal *w) 3078ev_signal_stop (EV_P_ ev_signal *w)
1771{ 3079{
1772 clear_pending (EV_A_ (W)w); 3080 clear_pending (EV_A_ (W)w);
1773 if (expect_false (!ev_is_active (w))) 3081 if (expect_false (!ev_is_active (w)))
1774 return; 3082 return;
1775 3083
3084 EV_FREQUENT_CHECK;
3085
1776 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3086 wlist_del (&signals [w->signum - 1].head, (WL)w);
1777 ev_stop (EV_A_ (W)w); 3087 ev_stop (EV_A_ (W)w);
1778 3088
1779 if (!signals [w->signum - 1].head) 3089 if (!signals [w->signum - 1].head)
3090 {
3091#if EV_MULTIPLICITY
3092 signals [w->signum - 1].loop = 0; /* unattach from signal */
3093#endif
3094#if EV_USE_SIGNALFD
3095 if (sigfd >= 0)
3096 {
3097 sigset_t ss;
3098
3099 sigemptyset (&ss);
3100 sigaddset (&ss, w->signum);
3101 sigdelset (&sigfd_set, w->signum);
3102
3103 signalfd (sigfd, &sigfd_set, 0);
3104 sigprocmask (SIG_UNBLOCK, &ss, 0);
3105 }
3106 else
3107#endif
1780 signal (w->signum, SIG_DFL); 3108 signal (w->signum, SIG_DFL);
3109 }
3110
3111 EV_FREQUENT_CHECK;
1781} 3112}
3113
3114#endif
3115
3116#if EV_CHILD_ENABLE
1782 3117
1783void 3118void
1784ev_child_start (EV_P_ ev_child *w) 3119ev_child_start (EV_P_ ev_child *w)
1785{ 3120{
1786#if EV_MULTIPLICITY 3121#if EV_MULTIPLICITY
1787 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3122 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1788#endif 3123#endif
1789 if (expect_false (ev_is_active (w))) 3124 if (expect_false (ev_is_active (w)))
1790 return; 3125 return;
1791 3126
3127 EV_FREQUENT_CHECK;
3128
1792 ev_start (EV_A_ (W)w, 1); 3129 ev_start (EV_A_ (W)w, 1);
1793 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3130 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3131
3132 EV_FREQUENT_CHECK;
1794} 3133}
1795 3134
1796void 3135void
1797ev_child_stop (EV_P_ ev_child *w) 3136ev_child_stop (EV_P_ ev_child *w)
1798{ 3137{
1799 clear_pending (EV_A_ (W)w); 3138 clear_pending (EV_A_ (W)w);
1800 if (expect_false (!ev_is_active (w))) 3139 if (expect_false (!ev_is_active (w)))
1801 return; 3140 return;
1802 3141
3142 EV_FREQUENT_CHECK;
3143
1803 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3144 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1804 ev_stop (EV_A_ (W)w); 3145 ev_stop (EV_A_ (W)w);
3146
3147 EV_FREQUENT_CHECK;
1805} 3148}
3149
3150#endif
1806 3151
1807#if EV_STAT_ENABLE 3152#if EV_STAT_ENABLE
1808 3153
1809# ifdef _WIN32 3154# ifdef _WIN32
1810# undef lstat 3155# undef lstat
1811# define lstat(a,b) _stati64 (a,b) 3156# define lstat(a,b) _stati64 (a,b)
1812# endif 3157# endif
1813 3158
1814#define DEF_STAT_INTERVAL 5.0074891 3159#define DEF_STAT_INTERVAL 5.0074891
3160#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1815#define MIN_STAT_INTERVAL 0.1074891 3161#define MIN_STAT_INTERVAL 0.1074891
1816 3162
1817static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3163static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1818 3164
1819#if EV_USE_INOTIFY 3165#if EV_USE_INOTIFY
1820# define EV_INOTIFY_BUFSIZE 8192 3166
3167/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3168# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1821 3169
1822static void noinline 3170static void noinline
1823infy_add (EV_P_ ev_stat *w) 3171infy_add (EV_P_ ev_stat *w)
1824{ 3172{
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); 3173 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 3174
1827 if (w->wd < 0) 3175 if (w->wd >= 0)
3176 {
3177 struct statfs sfs;
3178
3179 /* now local changes will be tracked by inotify, but remote changes won't */
3180 /* unless the filesystem is known to be local, we therefore still poll */
3181 /* also do poll on <2.6.25, but with normal frequency */
3182
3183 if (!fs_2625)
3184 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3185 else if (!statfs (w->path, &sfs)
3186 && (sfs.f_type == 0x1373 /* devfs */
3187 || sfs.f_type == 0xEF53 /* ext2/3 */
3188 || sfs.f_type == 0x3153464a /* jfs */
3189 || sfs.f_type == 0x52654973 /* reiser3 */
3190 || sfs.f_type == 0x01021994 /* tempfs */
3191 || sfs.f_type == 0x58465342 /* xfs */))
3192 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3193 else
3194 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1828 { 3195 }
1829 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3196 else
3197 {
3198 /* can't use inotify, continue to stat */
3199 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1830 3200
1831 /* monitor some parent directory for speedup hints */ 3201 /* if path is not there, monitor some parent directory for speedup hints */
3202 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3203 /* but an efficiency issue only */
1832 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3204 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1833 { 3205 {
1834 char path [4096]; 3206 char path [4096];
1835 strcpy (path, w->path); 3207 strcpy (path, w->path);
1836 3208
… …
1839 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3211 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1840 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3212 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1841 3213
1842 char *pend = strrchr (path, '/'); 3214 char *pend = strrchr (path, '/');
1843 3215
1844 if (!pend) 3216 if (!pend || pend == path)
1845 break; /* whoops, no '/', complain to your admin */ 3217 break;
1846 3218
1847 *pend = 0; 3219 *pend = 0;
1848 w->wd = inotify_add_watch (fs_fd, path, mask); 3220 w->wd = inotify_add_watch (fs_fd, path, mask);
1849 } 3221 }
1850 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3222 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1851 } 3223 }
1852 } 3224 }
1853 else
1854 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1855 3225
1856 if (w->wd >= 0) 3226 if (w->wd >= 0)
1857 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3227 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3228
3229 /* now re-arm timer, if required */
3230 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3231 ev_timer_again (EV_A_ &w->timer);
3232 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1858} 3233}
1859 3234
1860static void noinline 3235static void noinline
1861infy_del (EV_P_ ev_stat *w) 3236infy_del (EV_P_ ev_stat *w)
1862{ 3237{
… …
1865 3240
1866 if (wd < 0) 3241 if (wd < 0)
1867 return; 3242 return;
1868 3243
1869 w->wd = -2; 3244 w->wd = -2;
1870 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3245 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1871 wlist_del (&fs_hash [slot].head, (WL)w); 3246 wlist_del (&fs_hash [slot].head, (WL)w);
1872 3247
1873 /* remove this watcher, if others are watching it, they will rearm */ 3248 /* remove this watcher, if others are watching it, they will rearm */
1874 inotify_rm_watch (fs_fd, wd); 3249 inotify_rm_watch (fs_fd, wd);
1875} 3250}
1876 3251
1877static void noinline 3252static void noinline
1878infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3253infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1879{ 3254{
1880 if (slot < 0) 3255 if (slot < 0)
1881 /* overflow, need to check for all hahs slots */ 3256 /* overflow, need to check for all hash slots */
1882 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3257 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1883 infy_wd (EV_A_ slot, wd, ev); 3258 infy_wd (EV_A_ slot, wd, ev);
1884 else 3259 else
1885 { 3260 {
1886 WL w_; 3261 WL w_;
1887 3262
1888 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3263 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1889 { 3264 {
1890 ev_stat *w = (ev_stat *)w_; 3265 ev_stat *w = (ev_stat *)w_;
1891 w_ = w_->next; /* lets us remove this watcher and all before it */ 3266 w_ = w_->next; /* lets us remove this watcher and all before it */
1892 3267
1893 if (w->wd == wd || wd == -1) 3268 if (w->wd == wd || wd == -1)
1894 { 3269 {
1895 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3270 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1896 { 3271 {
3272 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1897 w->wd = -1; 3273 w->wd = -1;
1898 infy_add (EV_A_ w); /* re-add, no matter what */ 3274 infy_add (EV_A_ w); /* re-add, no matter what */
1899 } 3275 }
1900 3276
1901 stat_timer_cb (EV_A_ &w->timer, 0); 3277 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1906 3282
1907static void 3283static void
1908infy_cb (EV_P_ ev_io *w, int revents) 3284infy_cb (EV_P_ ev_io *w, int revents)
1909{ 3285{
1910 char buf [EV_INOTIFY_BUFSIZE]; 3286 char buf [EV_INOTIFY_BUFSIZE];
1911 struct inotify_event *ev = (struct inotify_event *)buf;
1912 int ofs; 3287 int ofs;
1913 int len = read (fs_fd, buf, sizeof (buf)); 3288 int len = read (fs_fd, buf, sizeof (buf));
1914 3289
1915 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3290 for (ofs = 0; ofs < len; )
3291 {
3292 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1916 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3293 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3294 ofs += sizeof (struct inotify_event) + ev->len;
3295 }
1917} 3296}
1918 3297
1919void inline_size 3298inline_size void ecb_cold
3299ev_check_2625 (EV_P)
3300{
3301 /* kernels < 2.6.25 are borked
3302 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3303 */
3304 if (ev_linux_version () < 0x020619)
3305 return;
3306
3307 fs_2625 = 1;
3308}
3309
3310inline_size int
3311infy_newfd (void)
3312{
3313#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3314 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3315 if (fd >= 0)
3316 return fd;
3317#endif
3318 return inotify_init ();
3319}
3320
3321inline_size void
1920infy_init (EV_P) 3322infy_init (EV_P)
1921{ 3323{
1922 if (fs_fd != -2) 3324 if (fs_fd != -2)
1923 return; 3325 return;
1924 3326
3327 fs_fd = -1;
3328
3329 ev_check_2625 (EV_A);
3330
1925 fs_fd = inotify_init (); 3331 fs_fd = infy_newfd ();
1926 3332
1927 if (fs_fd >= 0) 3333 if (fs_fd >= 0)
1928 { 3334 {
3335 fd_intern (fs_fd);
1929 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3336 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1930 ev_set_priority (&fs_w, EV_MAXPRI); 3337 ev_set_priority (&fs_w, EV_MAXPRI);
1931 ev_io_start (EV_A_ &fs_w); 3338 ev_io_start (EV_A_ &fs_w);
3339 ev_unref (EV_A);
1932 } 3340 }
1933} 3341}
1934 3342
1935void inline_size 3343inline_size void
1936infy_fork (EV_P) 3344infy_fork (EV_P)
1937{ 3345{
1938 int slot; 3346 int slot;
1939 3347
1940 if (fs_fd < 0) 3348 if (fs_fd < 0)
1941 return; 3349 return;
1942 3350
3351 ev_ref (EV_A);
3352 ev_io_stop (EV_A_ &fs_w);
1943 close (fs_fd); 3353 close (fs_fd);
1944 fs_fd = inotify_init (); 3354 fs_fd = infy_newfd ();
1945 3355
3356 if (fs_fd >= 0)
3357 {
3358 fd_intern (fs_fd);
3359 ev_io_set (&fs_w, fs_fd, EV_READ);
3360 ev_io_start (EV_A_ &fs_w);
3361 ev_unref (EV_A);
3362 }
3363
1946 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3364 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1947 { 3365 {
1948 WL w_ = fs_hash [slot].head; 3366 WL w_ = fs_hash [slot].head;
1949 fs_hash [slot].head = 0; 3367 fs_hash [slot].head = 0;
1950 3368
1951 while (w_) 3369 while (w_)
… …
1956 w->wd = -1; 3374 w->wd = -1;
1957 3375
1958 if (fs_fd >= 0) 3376 if (fs_fd >= 0)
1959 infy_add (EV_A_ w); /* re-add, no matter what */ 3377 infy_add (EV_A_ w); /* re-add, no matter what */
1960 else 3378 else
3379 {
3380 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3381 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1961 ev_timer_start (EV_A_ &w->timer); 3382 ev_timer_again (EV_A_ &w->timer);
3383 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3384 }
1962 } 3385 }
1963
1964 } 3386 }
1965} 3387}
1966 3388
3389#endif
3390
3391#ifdef _WIN32
3392# define EV_LSTAT(p,b) _stati64 (p, b)
3393#else
3394# define EV_LSTAT(p,b) lstat (p, b)
1967#endif 3395#endif
1968 3396
1969void 3397void
1970ev_stat_stat (EV_P_ ev_stat *w) 3398ev_stat_stat (EV_P_ ev_stat *w)
1971{ 3399{
… …
1978static void noinline 3406static void noinline
1979stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3407stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1980{ 3408{
1981 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3409 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1982 3410
1983 /* we copy this here each the time so that */ 3411 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); 3412 ev_stat_stat (EV_A_ w);
1987 3413
1988 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3414 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1989 if ( 3415 if (
1990 w->prev.st_dev != w->attr.st_dev 3416 prev.st_dev != w->attr.st_dev
1991 || w->prev.st_ino != w->attr.st_ino 3417 || prev.st_ino != w->attr.st_ino
1992 || w->prev.st_mode != w->attr.st_mode 3418 || prev.st_mode != w->attr.st_mode
1993 || w->prev.st_nlink != w->attr.st_nlink 3419 || prev.st_nlink != w->attr.st_nlink
1994 || w->prev.st_uid != w->attr.st_uid 3420 || prev.st_uid != w->attr.st_uid
1995 || w->prev.st_gid != w->attr.st_gid 3421 || prev.st_gid != w->attr.st_gid
1996 || w->prev.st_rdev != w->attr.st_rdev 3422 || prev.st_rdev != w->attr.st_rdev
1997 || w->prev.st_size != w->attr.st_size 3423 || prev.st_size != w->attr.st_size
1998 || w->prev.st_atime != w->attr.st_atime 3424 || prev.st_atime != w->attr.st_atime
1999 || w->prev.st_mtime != w->attr.st_mtime 3425 || prev.st_mtime != w->attr.st_mtime
2000 || w->prev.st_ctime != w->attr.st_ctime 3426 || prev.st_ctime != w->attr.st_ctime
2001 ) { 3427 ) {
3428 /* we only update w->prev on actual differences */
3429 /* in case we test more often than invoke the callback, */
3430 /* to ensure that prev is always different to attr */
3431 w->prev = prev;
3432
2002 #if EV_USE_INOTIFY 3433 #if EV_USE_INOTIFY
3434 if (fs_fd >= 0)
3435 {
2003 infy_del (EV_A_ w); 3436 infy_del (EV_A_ w);
2004 infy_add (EV_A_ w); 3437 infy_add (EV_A_ w);
2005 ev_stat_stat (EV_A_ w); /* avoid race... */ 3438 ev_stat_stat (EV_A_ w); /* avoid race... */
3439 }
2006 #endif 3440 #endif
2007 3441
2008 ev_feed_event (EV_A_ w, EV_STAT); 3442 ev_feed_event (EV_A_ w, EV_STAT);
2009 } 3443 }
2010} 3444}
… …
2013ev_stat_start (EV_P_ ev_stat *w) 3447ev_stat_start (EV_P_ ev_stat *w)
2014{ 3448{
2015 if (expect_false (ev_is_active (w))) 3449 if (expect_false (ev_is_active (w)))
2016 return; 3450 return;
2017 3451
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); 3452 ev_stat_stat (EV_A_ w);
2023 3453
3454 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2024 if (w->interval < MIN_STAT_INTERVAL) 3455 w->interval = MIN_STAT_INTERVAL;
2025 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2026 3456
2027 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3457 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)); 3458 ev_set_priority (&w->timer, ev_priority (w));
2029 3459
2030#if EV_USE_INOTIFY 3460#if EV_USE_INOTIFY
2031 infy_init (EV_A); 3461 infy_init (EV_A);
2032 3462
2033 if (fs_fd >= 0) 3463 if (fs_fd >= 0)
2034 infy_add (EV_A_ w); 3464 infy_add (EV_A_ w);
2035 else 3465 else
2036#endif 3466#endif
3467 {
2037 ev_timer_start (EV_A_ &w->timer); 3468 ev_timer_again (EV_A_ &w->timer);
3469 ev_unref (EV_A);
3470 }
2038 3471
2039 ev_start (EV_A_ (W)w, 1); 3472 ev_start (EV_A_ (W)w, 1);
3473
3474 EV_FREQUENT_CHECK;
2040} 3475}
2041 3476
2042void 3477void
2043ev_stat_stop (EV_P_ ev_stat *w) 3478ev_stat_stop (EV_P_ ev_stat *w)
2044{ 3479{
2045 clear_pending (EV_A_ (W)w); 3480 clear_pending (EV_A_ (W)w);
2046 if (expect_false (!ev_is_active (w))) 3481 if (expect_false (!ev_is_active (w)))
2047 return; 3482 return;
2048 3483
3484 EV_FREQUENT_CHECK;
3485
2049#if EV_USE_INOTIFY 3486#if EV_USE_INOTIFY
2050 infy_del (EV_A_ w); 3487 infy_del (EV_A_ w);
2051#endif 3488#endif
3489
3490 if (ev_is_active (&w->timer))
3491 {
3492 ev_ref (EV_A);
2052 ev_timer_stop (EV_A_ &w->timer); 3493 ev_timer_stop (EV_A_ &w->timer);
3494 }
2053 3495
2054 ev_stop (EV_A_ (W)w); 3496 ev_stop (EV_A_ (W)w);
3497
3498 EV_FREQUENT_CHECK;
2055} 3499}
2056#endif 3500#endif
2057 3501
2058#if EV_IDLE_ENABLE 3502#if EV_IDLE_ENABLE
2059void 3503void
… …
2062 if (expect_false (ev_is_active (w))) 3506 if (expect_false (ev_is_active (w)))
2063 return; 3507 return;
2064 3508
2065 pri_adjust (EV_A_ (W)w); 3509 pri_adjust (EV_A_ (W)w);
2066 3510
3511 EV_FREQUENT_CHECK;
3512
2067 { 3513 {
2068 int active = ++idlecnt [ABSPRI (w)]; 3514 int active = ++idlecnt [ABSPRI (w)];
2069 3515
2070 ++idleall; 3516 ++idleall;
2071 ev_start (EV_A_ (W)w, active); 3517 ev_start (EV_A_ (W)w, active);
2072 3518
2073 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3519 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2074 idles [ABSPRI (w)][active - 1] = w; 3520 idles [ABSPRI (w)][active - 1] = w;
2075 } 3521 }
3522
3523 EV_FREQUENT_CHECK;
2076} 3524}
2077 3525
2078void 3526void
2079ev_idle_stop (EV_P_ ev_idle *w) 3527ev_idle_stop (EV_P_ ev_idle *w)
2080{ 3528{
2081 clear_pending (EV_A_ (W)w); 3529 clear_pending (EV_A_ (W)w);
2082 if (expect_false (!ev_is_active (w))) 3530 if (expect_false (!ev_is_active (w)))
2083 return; 3531 return;
2084 3532
3533 EV_FREQUENT_CHECK;
3534
2085 { 3535 {
2086 int active = ((W)w)->active; 3536 int active = ev_active (w);
2087 3537
2088 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3538 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2089 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3539 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2090 3540
2091 ev_stop (EV_A_ (W)w); 3541 ev_stop (EV_A_ (W)w);
2092 --idleall; 3542 --idleall;
2093 } 3543 }
2094}
2095#endif
2096 3544
3545 EV_FREQUENT_CHECK;
3546}
3547#endif
3548
3549#if EV_PREPARE_ENABLE
2097void 3550void
2098ev_prepare_start (EV_P_ ev_prepare *w) 3551ev_prepare_start (EV_P_ ev_prepare *w)
2099{ 3552{
2100 if (expect_false (ev_is_active (w))) 3553 if (expect_false (ev_is_active (w)))
2101 return; 3554 return;
3555
3556 EV_FREQUENT_CHECK;
2102 3557
2103 ev_start (EV_A_ (W)w, ++preparecnt); 3558 ev_start (EV_A_ (W)w, ++preparecnt);
2104 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3559 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2105 prepares [preparecnt - 1] = w; 3560 prepares [preparecnt - 1] = w;
3561
3562 EV_FREQUENT_CHECK;
2106} 3563}
2107 3564
2108void 3565void
2109ev_prepare_stop (EV_P_ ev_prepare *w) 3566ev_prepare_stop (EV_P_ ev_prepare *w)
2110{ 3567{
2111 clear_pending (EV_A_ (W)w); 3568 clear_pending (EV_A_ (W)w);
2112 if (expect_false (!ev_is_active (w))) 3569 if (expect_false (!ev_is_active (w)))
2113 return; 3570 return;
2114 3571
3572 EV_FREQUENT_CHECK;
3573
2115 { 3574 {
2116 int active = ((W)w)->active; 3575 int active = ev_active (w);
3576
2117 prepares [active - 1] = prepares [--preparecnt]; 3577 prepares [active - 1] = prepares [--preparecnt];
2118 ((W)prepares [active - 1])->active = active; 3578 ev_active (prepares [active - 1]) = active;
2119 } 3579 }
2120 3580
2121 ev_stop (EV_A_ (W)w); 3581 ev_stop (EV_A_ (W)w);
2122}
2123 3582
3583 EV_FREQUENT_CHECK;
3584}
3585#endif
3586
3587#if EV_CHECK_ENABLE
2124void 3588void
2125ev_check_start (EV_P_ ev_check *w) 3589ev_check_start (EV_P_ ev_check *w)
2126{ 3590{
2127 if (expect_false (ev_is_active (w))) 3591 if (expect_false (ev_is_active (w)))
2128 return; 3592 return;
3593
3594 EV_FREQUENT_CHECK;
2129 3595
2130 ev_start (EV_A_ (W)w, ++checkcnt); 3596 ev_start (EV_A_ (W)w, ++checkcnt);
2131 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3597 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2132 checks [checkcnt - 1] = w; 3598 checks [checkcnt - 1] = w;
3599
3600 EV_FREQUENT_CHECK;
2133} 3601}
2134 3602
2135void 3603void
2136ev_check_stop (EV_P_ ev_check *w) 3604ev_check_stop (EV_P_ ev_check *w)
2137{ 3605{
2138 clear_pending (EV_A_ (W)w); 3606 clear_pending (EV_A_ (W)w);
2139 if (expect_false (!ev_is_active (w))) 3607 if (expect_false (!ev_is_active (w)))
2140 return; 3608 return;
2141 3609
3610 EV_FREQUENT_CHECK;
3611
2142 { 3612 {
2143 int active = ((W)w)->active; 3613 int active = ev_active (w);
3614
2144 checks [active - 1] = checks [--checkcnt]; 3615 checks [active - 1] = checks [--checkcnt];
2145 ((W)checks [active - 1])->active = active; 3616 ev_active (checks [active - 1]) = active;
2146 } 3617 }
2147 3618
2148 ev_stop (EV_A_ (W)w); 3619 ev_stop (EV_A_ (W)w);
3620
3621 EV_FREQUENT_CHECK;
2149} 3622}
3623#endif
2150 3624
2151#if EV_EMBED_ENABLE 3625#if EV_EMBED_ENABLE
2152void noinline 3626void noinline
2153ev_embed_sweep (EV_P_ ev_embed *w) 3627ev_embed_sweep (EV_P_ ev_embed *w)
2154{ 3628{
2155 ev_loop (w->loop, EVLOOP_NONBLOCK); 3629 ev_run (w->other, EVRUN_NOWAIT);
2156} 3630}
2157 3631
2158static void 3632static void
2159embed_cb (EV_P_ ev_io *io, int revents) 3633embed_io_cb (EV_P_ ev_io *io, int revents)
2160{ 3634{
2161 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3635 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2162 3636
2163 if (ev_cb (w)) 3637 if (ev_cb (w))
2164 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3638 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2165 else 3639 else
2166 ev_embed_sweep (loop, w); 3640 ev_run (w->other, EVRUN_NOWAIT);
2167} 3641}
3642
3643static void
3644embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3645{
3646 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3647
3648 {
3649 EV_P = w->other;
3650
3651 while (fdchangecnt)
3652 {
3653 fd_reify (EV_A);
3654 ev_run (EV_A_ EVRUN_NOWAIT);
3655 }
3656 }
3657}
3658
3659static void
3660embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3661{
3662 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3663
3664 ev_embed_stop (EV_A_ w);
3665
3666 {
3667 EV_P = w->other;
3668
3669 ev_loop_fork (EV_A);
3670 ev_run (EV_A_ EVRUN_NOWAIT);
3671 }
3672
3673 ev_embed_start (EV_A_ w);
3674}
3675
3676#if 0
3677static void
3678embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3679{
3680 ev_idle_stop (EV_A_ idle);
3681}
3682#endif
2168 3683
2169void 3684void
2170ev_embed_start (EV_P_ ev_embed *w) 3685ev_embed_start (EV_P_ ev_embed *w)
2171{ 3686{
2172 if (expect_false (ev_is_active (w))) 3687 if (expect_false (ev_is_active (w)))
2173 return; 3688 return;
2174 3689
2175 { 3690 {
2176 struct ev_loop *loop = w->loop; 3691 EV_P = w->other;
2177 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3692 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); 3693 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2179 } 3694 }
3695
3696 EV_FREQUENT_CHECK;
2180 3697
2181 ev_set_priority (&w->io, ev_priority (w)); 3698 ev_set_priority (&w->io, ev_priority (w));
2182 ev_io_start (EV_A_ &w->io); 3699 ev_io_start (EV_A_ &w->io);
2183 3700
3701 ev_prepare_init (&w->prepare, embed_prepare_cb);
3702 ev_set_priority (&w->prepare, EV_MINPRI);
3703 ev_prepare_start (EV_A_ &w->prepare);
3704
3705 ev_fork_init (&w->fork, embed_fork_cb);
3706 ev_fork_start (EV_A_ &w->fork);
3707
3708 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3709
2184 ev_start (EV_A_ (W)w, 1); 3710 ev_start (EV_A_ (W)w, 1);
3711
3712 EV_FREQUENT_CHECK;
2185} 3713}
2186 3714
2187void 3715void
2188ev_embed_stop (EV_P_ ev_embed *w) 3716ev_embed_stop (EV_P_ ev_embed *w)
2189{ 3717{
2190 clear_pending (EV_A_ (W)w); 3718 clear_pending (EV_A_ (W)w);
2191 if (expect_false (!ev_is_active (w))) 3719 if (expect_false (!ev_is_active (w)))
2192 return; 3720 return;
2193 3721
3722 EV_FREQUENT_CHECK;
3723
2194 ev_io_stop (EV_A_ &w->io); 3724 ev_io_stop (EV_A_ &w->io);
3725 ev_prepare_stop (EV_A_ &w->prepare);
3726 ev_fork_stop (EV_A_ &w->fork);
2195 3727
2196 ev_stop (EV_A_ (W)w); 3728 ev_stop (EV_A_ (W)w);
3729
3730 EV_FREQUENT_CHECK;
2197} 3731}
2198#endif 3732#endif
2199 3733
2200#if EV_FORK_ENABLE 3734#if EV_FORK_ENABLE
2201void 3735void
2202ev_fork_start (EV_P_ ev_fork *w) 3736ev_fork_start (EV_P_ ev_fork *w)
2203{ 3737{
2204 if (expect_false (ev_is_active (w))) 3738 if (expect_false (ev_is_active (w)))
2205 return; 3739 return;
2206 3740
3741 EV_FREQUENT_CHECK;
3742
2207 ev_start (EV_A_ (W)w, ++forkcnt); 3743 ev_start (EV_A_ (W)w, ++forkcnt);
2208 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3744 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2209 forks [forkcnt - 1] = w; 3745 forks [forkcnt - 1] = w;
3746
3747 EV_FREQUENT_CHECK;
2210} 3748}
2211 3749
2212void 3750void
2213ev_fork_stop (EV_P_ ev_fork *w) 3751ev_fork_stop (EV_P_ ev_fork *w)
2214{ 3752{
2215 clear_pending (EV_A_ (W)w); 3753 clear_pending (EV_A_ (W)w);
2216 if (expect_false (!ev_is_active (w))) 3754 if (expect_false (!ev_is_active (w)))
2217 return; 3755 return;
2218 3756
3757 EV_FREQUENT_CHECK;
3758
2219 { 3759 {
2220 int active = ((W)w)->active; 3760 int active = ev_active (w);
3761
2221 forks [active - 1] = forks [--forkcnt]; 3762 forks [active - 1] = forks [--forkcnt];
2222 ((W)forks [active - 1])->active = active; 3763 ev_active (forks [active - 1]) = active;
2223 } 3764 }
2224 3765
2225 ev_stop (EV_A_ (W)w); 3766 ev_stop (EV_A_ (W)w);
3767
3768 EV_FREQUENT_CHECK;
3769}
3770#endif
3771
3772#if EV_CLEANUP_ENABLE
3773void
3774ev_cleanup_start (EV_P_ ev_cleanup *w)
3775{
3776 if (expect_false (ev_is_active (w)))
3777 return;
3778
3779 EV_FREQUENT_CHECK;
3780
3781 ev_start (EV_A_ (W)w, ++cleanupcnt);
3782 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3783 cleanups [cleanupcnt - 1] = w;
3784
3785 /* cleanup watchers should never keep a refcount on the loop */
3786 ev_unref (EV_A);
3787 EV_FREQUENT_CHECK;
3788}
3789
3790void
3791ev_cleanup_stop (EV_P_ ev_cleanup *w)
3792{
3793 clear_pending (EV_A_ (W)w);
3794 if (expect_false (!ev_is_active (w)))
3795 return;
3796
3797 EV_FREQUENT_CHECK;
3798 ev_ref (EV_A);
3799
3800 {
3801 int active = ev_active (w);
3802
3803 cleanups [active - 1] = cleanups [--cleanupcnt];
3804 ev_active (cleanups [active - 1]) = active;
3805 }
3806
3807 ev_stop (EV_A_ (W)w);
3808
3809 EV_FREQUENT_CHECK;
3810}
3811#endif
3812
3813#if EV_ASYNC_ENABLE
3814void
3815ev_async_start (EV_P_ ev_async *w)
3816{
3817 if (expect_false (ev_is_active (w)))
3818 return;
3819
3820 w->sent = 0;
3821
3822 evpipe_init (EV_A);
3823
3824 EV_FREQUENT_CHECK;
3825
3826 ev_start (EV_A_ (W)w, ++asynccnt);
3827 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3828 asyncs [asynccnt - 1] = w;
3829
3830 EV_FREQUENT_CHECK;
3831}
3832
3833void
3834ev_async_stop (EV_P_ ev_async *w)
3835{
3836 clear_pending (EV_A_ (W)w);
3837 if (expect_false (!ev_is_active (w)))
3838 return;
3839
3840 EV_FREQUENT_CHECK;
3841
3842 {
3843 int active = ev_active (w);
3844
3845 asyncs [active - 1] = asyncs [--asynccnt];
3846 ev_active (asyncs [active - 1]) = active;
3847 }
3848
3849 ev_stop (EV_A_ (W)w);
3850
3851 EV_FREQUENT_CHECK;
3852}
3853
3854void
3855ev_async_send (EV_P_ ev_async *w)
3856{
3857 w->sent = 1;
3858 evpipe_write (EV_A_ &async_pending);
2226} 3859}
2227#endif 3860#endif
2228 3861
2229/*****************************************************************************/ 3862/*****************************************************************************/
2230 3863
… …
2240once_cb (EV_P_ struct ev_once *once, int revents) 3873once_cb (EV_P_ struct ev_once *once, int revents)
2241{ 3874{
2242 void (*cb)(int revents, void *arg) = once->cb; 3875 void (*cb)(int revents, void *arg) = once->cb;
2243 void *arg = once->arg; 3876 void *arg = once->arg;
2244 3877
2245 ev_io_stop (EV_A_ &once->io); 3878 ev_io_stop (EV_A_ &once->io);
2246 ev_timer_stop (EV_A_ &once->to); 3879 ev_timer_stop (EV_A_ &once->to);
2247 ev_free (once); 3880 ev_free (once);
2248 3881
2249 cb (revents, arg); 3882 cb (revents, arg);
2250} 3883}
2251 3884
2252static void 3885static void
2253once_cb_io (EV_P_ ev_io *w, int revents) 3886once_cb_io (EV_P_ ev_io *w, int revents)
2254{ 3887{
2255 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3888 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3889
3890 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2256} 3891}
2257 3892
2258static void 3893static void
2259once_cb_to (EV_P_ ev_timer *w, int revents) 3894once_cb_to (EV_P_ ev_timer *w, int revents)
2260{ 3895{
2261 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3896 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3897
3898 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2262} 3899}
2263 3900
2264void 3901void
2265ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3902ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2266{ 3903{
2267 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3904 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2268 3905
2269 if (expect_false (!once)) 3906 if (expect_false (!once))
2270 { 3907 {
2271 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3908 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2272 return; 3909 return;
2273 } 3910 }
2274 3911
2275 once->cb = cb; 3912 once->cb = cb;
2276 once->arg = arg; 3913 once->arg = arg;
… …
2288 ev_timer_set (&once->to, timeout, 0.); 3925 ev_timer_set (&once->to, timeout, 0.);
2289 ev_timer_start (EV_A_ &once->to); 3926 ev_timer_start (EV_A_ &once->to);
2290 } 3927 }
2291} 3928}
2292 3929
2293#ifdef __cplusplus 3930/*****************************************************************************/
2294} 3931
3932#if EV_WALK_ENABLE
3933void ecb_cold
3934ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3935{
3936 int i, j;
3937 ev_watcher_list *wl, *wn;
3938
3939 if (types & (EV_IO | EV_EMBED))
3940 for (i = 0; i < anfdmax; ++i)
3941 for (wl = anfds [i].head; wl; )
3942 {
3943 wn = wl->next;
3944
3945#if EV_EMBED_ENABLE
3946 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3947 {
3948 if (types & EV_EMBED)
3949 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3950 }
3951 else
3952#endif
3953#if EV_USE_INOTIFY
3954 if (ev_cb ((ev_io *)wl) == infy_cb)
3955 ;
3956 else
3957#endif
3958 if ((ev_io *)wl != &pipe_w)
3959 if (types & EV_IO)
3960 cb (EV_A_ EV_IO, wl);
3961
3962 wl = wn;
3963 }
3964
3965 if (types & (EV_TIMER | EV_STAT))
3966 for (i = timercnt + HEAP0; i-- > HEAP0; )
3967#if EV_STAT_ENABLE
3968 /*TODO: timer is not always active*/
3969 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3970 {
3971 if (types & EV_STAT)
3972 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3973 }
3974 else
3975#endif
3976 if (types & EV_TIMER)
3977 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3978
3979#if EV_PERIODIC_ENABLE
3980 if (types & EV_PERIODIC)
3981 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3982 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3983#endif
3984
3985#if EV_IDLE_ENABLE
3986 if (types & EV_IDLE)
3987 for (j = NUMPRI; i--; )
3988 for (i = idlecnt [j]; i--; )
3989 cb (EV_A_ EV_IDLE, idles [j][i]);
3990#endif
3991
3992#if EV_FORK_ENABLE
3993 if (types & EV_FORK)
3994 for (i = forkcnt; i--; )
3995 if (ev_cb (forks [i]) != embed_fork_cb)
3996 cb (EV_A_ EV_FORK, forks [i]);
3997#endif
3998
3999#if EV_ASYNC_ENABLE
4000 if (types & EV_ASYNC)
4001 for (i = asynccnt; i--; )
4002 cb (EV_A_ EV_ASYNC, asyncs [i]);
4003#endif
4004
4005#if EV_PREPARE_ENABLE
4006 if (types & EV_PREPARE)
4007 for (i = preparecnt; i--; )
4008# if EV_EMBED_ENABLE
4009 if (ev_cb (prepares [i]) != embed_prepare_cb)
2295#endif 4010# endif
4011 cb (EV_A_ EV_PREPARE, prepares [i]);
4012#endif
2296 4013
4014#if EV_CHECK_ENABLE
4015 if (types & EV_CHECK)
4016 for (i = checkcnt; i--; )
4017 cb (EV_A_ EV_CHECK, checks [i]);
4018#endif
4019
4020#if EV_SIGNAL_ENABLE
4021 if (types & EV_SIGNAL)
4022 for (i = 0; i < EV_NSIG - 1; ++i)
4023 for (wl = signals [i].head; wl; )
4024 {
4025 wn = wl->next;
4026 cb (EV_A_ EV_SIGNAL, wl);
4027 wl = wn;
4028 }
4029#endif
4030
4031#if EV_CHILD_ENABLE
4032 if (types & EV_CHILD)
4033 for (i = (EV_PID_HASHSIZE); i--; )
4034 for (wl = childs [i]; wl; )
4035 {
4036 wn = wl->next;
4037 cb (EV_A_ EV_CHILD, wl);
4038 wl = wn;
4039 }
4040#endif
4041/* EV_STAT 0x00001000 /* stat data changed */
4042/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4043}
4044#endif
4045
4046#if EV_MULTIPLICITY
4047 #include "ev_wrap.h"
4048#endif
4049
4050EV_CPP(})
4051

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