ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.129 by root, Fri Nov 23 05:00:44 2007 UTC vs.
Revision 1.410 by root, Sat Feb 4 17:57:55 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 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
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
37# include "config.h" 45# include "config.h"
46# endif
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
38 67
39# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
42# endif 71# endif
43# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
45# endif 74# endif
46# else 75# else
47# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
48# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
49# endif 78# endif
50# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
51# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
52# endif 81# endif
53# endif 82# endif
54 83
84# if HAVE_NANOSLEEP
55# ifndef EV_USE_SELECT 85# ifndef EV_USE_NANOSLEEP
56# if HAVE_SELECT && HAVE_SYS_SELECT_H 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
57# define EV_USE_SELECT 1
58# else
59# define EV_USE_SELECT 0
60# endif 87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
61# endif 91# endif
62 92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
63# ifndef EV_USE_POLL 94# ifndef EV_USE_SELECT
64# if HAVE_POLL && HAVE_POLL_H 95# define EV_USE_SELECT EV_FEATURE_BACKENDS
65# define EV_USE_POLL 1
66# else
67# define EV_USE_POLL 0
68# 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
69# endif 109# endif
70 110
71# ifndef EV_USE_EPOLL
72# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
73# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
74# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
75# define EV_USE_EPOLL 0
76# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
77# endif 118# endif
78 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
79# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
80# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
81# define EV_USE_KQUEUE 1
82# else
83# define EV_USE_KQUEUE 0
84# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
85# endif 127# endif
86 128
87# ifndef EV_USE_PORT
88# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
89# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
90# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
91# define EV_USE_PORT 0
92# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
93# endif 136# endif
94 137
138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
95#endif 145# endif
96 146
97#include <math.h> 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
154# endif
155
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
98#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
99#include <fcntl.h> 169#include <fcntl.h>
100#include <stddef.h> 170#include <stddef.h>
101 171
102#include <stdio.h> 172#include <stdio.h>
103 173
104#include <assert.h> 174#include <assert.h>
105#include <errno.h> 175#include <errno.h>
106#include <sys/types.h> 176#include <sys/types.h>
107#include <time.h> 177#include <time.h>
178#include <limits.h>
108 179
109#include <signal.h> 180#include <signal.h>
110 181
182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
198
111#ifndef _WIN32 199#ifndef _WIN32
112# include <unistd.h>
113# include <sys/time.h> 200# include <sys/time.h>
114# include <sys/wait.h> 201# include <sys/wait.h>
202# include <unistd.h>
115#else 203#else
204# include <io.h>
116# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
117# include <windows.h> 206# include <windows.h>
118# ifndef EV_SELECT_IS_WINSOCKET 207# ifndef EV_SELECT_IS_WINSOCKET
119# define EV_SELECT_IS_WINSOCKET 1 208# define EV_SELECT_IS_WINSOCKET 1
120# endif 209# endif
210# undef EV_AVOID_STDIO
211#endif
212
213/* OS X, in its infinite idiocy, actually HARDCODES
214 * a limit of 1024 into their select. Where people have brains,
215 * OS X engineers apparently have a vacuum. Or maybe they were
216 * ordered to have a vacuum, or they do anything for money.
217 * This might help. Or not.
218 */
219#define _DARWIN_UNLIMITED_SELECT 1
220
221/* this block tries to deduce configuration from header-defined symbols and defaults */
222
223/* try to deduce the maximum number of signals on this platform */
224#if defined (EV_NSIG)
225/* use what's provided */
226#elif defined (NSIG)
227# define EV_NSIG (NSIG)
228#elif defined(_NSIG)
229# define EV_NSIG (_NSIG)
230#elif defined (SIGMAX)
231# define EV_NSIG (SIGMAX+1)
232#elif defined (SIG_MAX)
233# define EV_NSIG (SIG_MAX+1)
234#elif defined (_SIG_MAX)
235# define EV_NSIG (_SIG_MAX+1)
236#elif defined (MAXSIG)
237# define EV_NSIG (MAXSIG+1)
238#elif defined (MAX_SIG)
239# define EV_NSIG (MAX_SIG+1)
240#elif defined (SIGARRAYSIZE)
241# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
242#elif defined (_sys_nsig)
243# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
244#else
245# error "unable to find value for NSIG, please report"
246/* to make it compile regardless, just remove the above line, */
247/* but consider reporting it, too! :) */
248# define EV_NSIG 65
249#endif
250
251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
253#endif
254
255#ifndef EV_USE_CLOCK_SYSCALL
256# if __linux && __GLIBC__ >= 2
257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
258# else
259# define EV_USE_CLOCK_SYSCALL 0
121#endif 260# endif
122 261#endif
123/**/
124 262
125#ifndef EV_USE_MONOTONIC 263#ifndef EV_USE_MONOTONIC
264# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
265# define EV_USE_MONOTONIC EV_FEATURE_OS
266# else
126# define EV_USE_MONOTONIC 0 267# define EV_USE_MONOTONIC 0
268# endif
127#endif 269#endif
128 270
129#ifndef EV_USE_REALTIME 271#ifndef EV_USE_REALTIME
130# define EV_USE_REALTIME 0 272# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
273#endif
274
275#ifndef EV_USE_NANOSLEEP
276# if _POSIX_C_SOURCE >= 199309L
277# define EV_USE_NANOSLEEP EV_FEATURE_OS
278# else
279# define EV_USE_NANOSLEEP 0
280# endif
131#endif 281#endif
132 282
133#ifndef EV_USE_SELECT 283#ifndef EV_USE_SELECT
134# define EV_USE_SELECT 1 284# define EV_USE_SELECT EV_FEATURE_BACKENDS
135#endif 285#endif
136 286
137#ifndef EV_USE_POLL 287#ifndef EV_USE_POLL
138# ifdef _WIN32 288# ifdef _WIN32
139# define EV_USE_POLL 0 289# define EV_USE_POLL 0
140# else 290# else
141# define EV_USE_POLL 1 291# define EV_USE_POLL EV_FEATURE_BACKENDS
142# endif 292# endif
143#endif 293#endif
144 294
145#ifndef EV_USE_EPOLL 295#ifndef EV_USE_EPOLL
296# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
297# define EV_USE_EPOLL EV_FEATURE_BACKENDS
298# else
146# define EV_USE_EPOLL 0 299# define EV_USE_EPOLL 0
300# endif
147#endif 301#endif
148 302
149#ifndef EV_USE_KQUEUE 303#ifndef EV_USE_KQUEUE
150# define EV_USE_KQUEUE 0 304# define EV_USE_KQUEUE 0
151#endif 305#endif
152 306
153#ifndef EV_USE_PORT 307#ifndef EV_USE_PORT
154# define EV_USE_PORT 0 308# define EV_USE_PORT 0
155#endif 309#endif
156 310
157/**/ 311#ifndef EV_USE_INOTIFY
312# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
313# define EV_USE_INOTIFY EV_FEATURE_OS
314# else
315# define EV_USE_INOTIFY 0
316# endif
317#endif
318
319#ifndef EV_PID_HASHSIZE
320# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
321#endif
322
323#ifndef EV_INOTIFY_HASHSIZE
324# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
325#endif
326
327#ifndef EV_USE_EVENTFD
328# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
329# define EV_USE_EVENTFD EV_FEATURE_OS
330# else
331# define EV_USE_EVENTFD 0
332# endif
333#endif
334
335#ifndef EV_USE_SIGNALFD
336# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
337# define EV_USE_SIGNALFD EV_FEATURE_OS
338# else
339# define EV_USE_SIGNALFD 0
340# endif
341#endif
342
343#if 0 /* debugging */
344# define EV_VERIFY 3
345# define EV_USE_4HEAP 1
346# define EV_HEAP_CACHE_AT 1
347#endif
348
349#ifndef EV_VERIFY
350# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
351#endif
352
353#ifndef EV_USE_4HEAP
354# define EV_USE_4HEAP EV_FEATURE_DATA
355#endif
356
357#ifndef EV_HEAP_CACHE_AT
358# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
359#endif
360
361/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
362/* which makes programs even slower. might work on other unices, too. */
363#if EV_USE_CLOCK_SYSCALL
364# include <syscall.h>
365# ifdef SYS_clock_gettime
366# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
367# undef EV_USE_MONOTONIC
368# define EV_USE_MONOTONIC 1
369# else
370# undef EV_USE_CLOCK_SYSCALL
371# define EV_USE_CLOCK_SYSCALL 0
372# endif
373#endif
374
375/* this block fixes any misconfiguration where we know we run into trouble otherwise */
376
377#ifdef _AIX
378/* AIX has a completely broken poll.h header */
379# undef EV_USE_POLL
380# define EV_USE_POLL 0
381#endif
158 382
159#ifndef CLOCK_MONOTONIC 383#ifndef CLOCK_MONOTONIC
160# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
161# define EV_USE_MONOTONIC 0 385# define EV_USE_MONOTONIC 0
162#endif 386#endif
… …
164#ifndef CLOCK_REALTIME 388#ifndef CLOCK_REALTIME
165# undef EV_USE_REALTIME 389# undef EV_USE_REALTIME
166# define EV_USE_REALTIME 0 390# define EV_USE_REALTIME 0
167#endif 391#endif
168 392
393#if !EV_STAT_ENABLE
394# undef EV_USE_INOTIFY
395# define EV_USE_INOTIFY 0
396#endif
397
398#if !EV_USE_NANOSLEEP
399/* hp-ux has it in sys/time.h, which we unconditionally include above */
400# if !defined(_WIN32) && !defined(__hpux)
401# include <sys/select.h>
402# endif
403#endif
404
405#if EV_USE_INOTIFY
406# include <sys/statfs.h>
407# include <sys/inotify.h>
408/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
409# ifndef IN_DONT_FOLLOW
410# undef EV_USE_INOTIFY
411# define EV_USE_INOTIFY 0
412# endif
413#endif
414
169#if EV_SELECT_IS_WINSOCKET 415#if EV_SELECT_IS_WINSOCKET
170# include <winsock.h> 416# include <winsock.h>
171#endif 417#endif
172 418
419#if EV_USE_EVENTFD
420/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
421# include <stdint.h>
422# ifndef EFD_NONBLOCK
423# define EFD_NONBLOCK O_NONBLOCK
424# endif
425# ifndef EFD_CLOEXEC
426# ifdef O_CLOEXEC
427# define EFD_CLOEXEC O_CLOEXEC
428# else
429# define EFD_CLOEXEC 02000000
430# endif
431# endif
432EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
433#endif
434
435#if EV_USE_SIGNALFD
436/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
437# include <stdint.h>
438# ifndef SFD_NONBLOCK
439# define SFD_NONBLOCK O_NONBLOCK
440# endif
441# ifndef SFD_CLOEXEC
442# ifdef O_CLOEXEC
443# define SFD_CLOEXEC O_CLOEXEC
444# else
445# define SFD_CLOEXEC 02000000
446# endif
447# endif
448EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
449
450struct signalfd_siginfo
451{
452 uint32_t ssi_signo;
453 char pad[128 - sizeof (uint32_t)];
454};
455#endif
456
173/**/ 457/**/
458
459#if EV_VERIFY >= 3
460# define EV_FREQUENT_CHECK ev_verify (EV_A)
461#else
462# define EV_FREQUENT_CHECK do { } while (0)
463#endif
464
465/*
466 * This is used to work around floating point rounding problems.
467 * This value is good at least till the year 4000.
468 */
469#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
470/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
174 471
175#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 472#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
176#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 473#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
177#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
178/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
179 474
475#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
476#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
477
478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
479/* ECB.H BEGIN */
480/*
481 * libecb - http://software.schmorp.de/pkg/libecb
482 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved.
486 *
487 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met:
489 *
490 * 1. Redistributions of source code must retain the above copyright notice,
491 * this list of conditions and the following disclaimer.
492 *
493 * 2. Redistributions in binary form must reproduce the above copyright
494 * notice, this list of conditions and the following disclaimer in the
495 * documentation and/or other materials provided with the distribution.
496 *
497 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
498 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
499 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
500 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
501 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
505 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE.
507 */
508
180#ifdef EV_H 509#ifndef ECB_H
181# include EV_H 510#define ECB_H
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
519 #if __GNUC__
520 typedef signed long long int64_t;
521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
182#else 526#else
183# include "ev.h" 527 #include <inttypes.h>
528#endif
529
530/* many compilers define _GNUC_ to some versions but then only implement
531 * what their idiot authors think are the "more important" extensions,
532 * causing enormous grief in return for some better fake benchmark numbers.
533 * or so.
534 * we try to detect these and simply assume they are not gcc - if they have
535 * an issue with that they should have done it right in the first place.
536 */
537#ifndef ECB_GCC_VERSION
538 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
539 #define ECB_GCC_VERSION(major,minor) 0
540 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
184#endif 542 #endif
543#endif
185 544
186#if __GNUC__ >= 3 545/*****************************************************************************/
187# define expect(expr,value) __builtin_expect ((expr),(value)) 546
188# define inline static inline 547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549
550#if ECB_NO_THREADS
551# define ECB_NO_SMP 1
552#endif
553
554#if ECB_NO_THREADS || ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0)
556#endif
557
558#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
571 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
574 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
576 #elif __sparc || __sparc__
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined(__s390__) || defined(__s390x__)
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #endif
583 #endif
584#endif
585
586#ifndef ECB_MEMORY_FENCE
587 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
588 #define ECB_MEMORY_FENCE __sync_synchronize ()
589 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
590 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
591 #elif _MSC_VER >= 1400 /* VC++ 2005 */
592 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
593 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
594 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
595 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
596 #elif defined(_WIN32)
597 #include <WinNT.h>
598 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
599 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
600 #include <mbarrier.h>
601 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
602 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
603 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
604 #endif
605#endif
606
607#ifndef ECB_MEMORY_FENCE
608 #if !ECB_AVOID_PTHREADS
609 /*
610 * if you get undefined symbol references to pthread_mutex_lock,
611 * or failure to find pthread.h, then you should implement
612 * the ECB_MEMORY_FENCE operations for your cpu/compiler
613 * OR provide pthread.h and link against the posix thread library
614 * of your system.
615 */
616 #include <pthread.h>
617 #define ECB_NEEDS_PTHREADS 1
618 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
619
620 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
621 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
622 #endif
623#endif
624
625#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
626 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
627#endif
628
629#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
630 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
631#endif
632
633/*****************************************************************************/
634
635#define ECB_C99 (__STDC_VERSION__ >= 199901L)
636
637#if __cplusplus
638 #define ecb_inline static inline
639#elif ECB_GCC_VERSION(2,5)
640 #define ecb_inline static __inline__
641#elif ECB_C99
642 #define ecb_inline static inline
189#else 643#else
644 #define ecb_inline static
645#endif
646
647#if ECB_GCC_VERSION(3,3)
648 #define ecb_restrict __restrict__
649#elif ECB_C99
650 #define ecb_restrict restrict
651#else
652 #define ecb_restrict
653#endif
654
655typedef int ecb_bool;
656
657#define ECB_CONCAT_(a, b) a ## b
658#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
659#define ECB_STRINGIFY_(a) # a
660#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
661
662#define ecb_function_ ecb_inline
663
664#if ECB_GCC_VERSION(3,1)
665 #define ecb_attribute(attrlist) __attribute__(attrlist)
666 #define ecb_is_constant(expr) __builtin_constant_p (expr)
667 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
668 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
669#else
670 #define ecb_attribute(attrlist)
671 #define ecb_is_constant(expr) 0
190# define expect(expr,value) (expr) 672 #define ecb_expect(expr,value) (expr)
191# define inline static 673 #define ecb_prefetch(addr,rw,locality)
192#endif 674#endif
193 675
676/* no emulation for ecb_decltype */
677#if ECB_GCC_VERSION(4,5)
678 #define ecb_decltype(x) __decltype(x)
679#elif ECB_GCC_VERSION(3,0)
680 #define ecb_decltype(x) __typeof(x)
681#endif
682
683#define ecb_noinline ecb_attribute ((__noinline__))
684#define ecb_noreturn ecb_attribute ((__noreturn__))
685#define ecb_unused ecb_attribute ((__unused__))
686#define ecb_const ecb_attribute ((__const__))
687#define ecb_pure ecb_attribute ((__pure__))
688
689#if ECB_GCC_VERSION(4,3)
690 #define ecb_artificial ecb_attribute ((__artificial__))
691 #define ecb_hot ecb_attribute ((__hot__))
692 #define ecb_cold ecb_attribute ((__cold__))
693#else
694 #define ecb_artificial
695 #define ecb_hot
696 #define ecb_cold
697#endif
698
699/* put around conditional expressions if you are very sure that the */
700/* expression is mostly true or mostly false. note that these return */
701/* booleans, not the expression. */
194#define expect_false(expr) expect ((expr) != 0, 0) 702#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
195#define expect_true(expr) expect ((expr) != 0, 1) 703#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
704/* for compatibility to the rest of the world */
705#define ecb_likely(expr) ecb_expect_true (expr)
706#define ecb_unlikely(expr) ecb_expect_false (expr)
196 707
708/* count trailing zero bits and count # of one bits */
709#if ECB_GCC_VERSION(3,4)
710 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
711 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
712 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
713 #define ecb_ctz32(x) __builtin_ctz (x)
714 #define ecb_ctz64(x) __builtin_ctzll (x)
715 #define ecb_popcount32(x) __builtin_popcount (x)
716 /* no popcountll */
717#else
718 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
719 ecb_function_ int
720 ecb_ctz32 (uint32_t x)
721 {
722 int r = 0;
723
724 x &= ~x + 1; /* this isolates the lowest bit */
725
726#if ECB_branchless_on_i386
727 r += !!(x & 0xaaaaaaaa) << 0;
728 r += !!(x & 0xcccccccc) << 1;
729 r += !!(x & 0xf0f0f0f0) << 2;
730 r += !!(x & 0xff00ff00) << 3;
731 r += !!(x & 0xffff0000) << 4;
732#else
733 if (x & 0xaaaaaaaa) r += 1;
734 if (x & 0xcccccccc) r += 2;
735 if (x & 0xf0f0f0f0) r += 4;
736 if (x & 0xff00ff00) r += 8;
737 if (x & 0xffff0000) r += 16;
738#endif
739
740 return r;
741 }
742
743 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
744 ecb_function_ int
745 ecb_ctz64 (uint64_t x)
746 {
747 int shift = x & 0xffffffffU ? 0 : 32;
748 return ecb_ctz32 (x >> shift) + shift;
749 }
750
751 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
752 ecb_function_ int
753 ecb_popcount32 (uint32_t x)
754 {
755 x -= (x >> 1) & 0x55555555;
756 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
757 x = ((x >> 4) + x) & 0x0f0f0f0f;
758 x *= 0x01010101;
759
760 return x >> 24;
761 }
762
763 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
764 ecb_function_ int ecb_ld32 (uint32_t x)
765 {
766 int r = 0;
767
768 if (x >> 16) { x >>= 16; r += 16; }
769 if (x >> 8) { x >>= 8; r += 8; }
770 if (x >> 4) { x >>= 4; r += 4; }
771 if (x >> 2) { x >>= 2; r += 2; }
772 if (x >> 1) { r += 1; }
773
774 return r;
775 }
776
777 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
778 ecb_function_ int ecb_ld64 (uint64_t x)
779 {
780 int r = 0;
781
782 if (x >> 32) { x >>= 32; r += 32; }
783
784 return r + ecb_ld32 (x);
785 }
786#endif
787
788ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
789ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
790{
791 return ( (x * 0x0802U & 0x22110U)
792 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
793}
794
795ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
796ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
797{
798 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
799 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
800 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
801 x = ( x >> 8 ) | ( x << 8);
802
803 return x;
804}
805
806ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
807ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
808{
809 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
810 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
811 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
812 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
813 x = ( x >> 16 ) | ( x << 16);
814
815 return x;
816}
817
818/* popcount64 is only available on 64 bit cpus as gcc builtin */
819/* so for this version we are lazy */
820ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
821ecb_function_ int
822ecb_popcount64 (uint64_t x)
823{
824 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
825}
826
827ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
828ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
829ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
830ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
831ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
832ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
833ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
834ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
835
836ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
837ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
838ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
839ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
840ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
841ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
842ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
843ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
844
845#if ECB_GCC_VERSION(4,3)
846 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
847 #define ecb_bswap32(x) __builtin_bswap32 (x)
848 #define ecb_bswap64(x) __builtin_bswap64 (x)
849#else
850 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
851 ecb_function_ uint16_t
852 ecb_bswap16 (uint16_t x)
853 {
854 return ecb_rotl16 (x, 8);
855 }
856
857 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
858 ecb_function_ uint32_t
859 ecb_bswap32 (uint32_t x)
860 {
861 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
862 }
863
864 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
865 ecb_function_ uint64_t
866 ecb_bswap64 (uint64_t x)
867 {
868 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
869 }
870#endif
871
872#if ECB_GCC_VERSION(4,5)
873 #define ecb_unreachable() __builtin_unreachable ()
874#else
875 /* this seems to work fine, but gcc always emits a warning for it :/ */
876 ecb_inline void ecb_unreachable (void) ecb_noreturn;
877 ecb_inline void ecb_unreachable (void) { }
878#endif
879
880/* try to tell the compiler that some condition is definitely true */
881#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
882
883ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
884ecb_inline unsigned char
885ecb_byteorder_helper (void)
886{
887 const uint32_t u = 0x11223344;
888 return *(unsigned char *)&u;
889}
890
891ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
892ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
893ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
894ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
895
896#if ECB_GCC_VERSION(3,0) || ECB_C99
897 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
898#else
899 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
900#endif
901
902#if __cplusplus
903 template<typename T>
904 static inline T ecb_div_rd (T val, T div)
905 {
906 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
907 }
908 template<typename T>
909 static inline T ecb_div_ru (T val, T div)
910 {
911 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
912 }
913#else
914 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
915 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
916#endif
917
918#if ecb_cplusplus_does_not_suck
919 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
920 template<typename T, int N>
921 static inline int ecb_array_length (const T (&arr)[N])
922 {
923 return N;
924 }
925#else
926 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
927#endif
928
929#endif
930
931/* ECB.H END */
932
933#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
934/* if your architecture doesn't need memory fences, e.g. because it is
935 * single-cpu/core, or if you use libev in a project that doesn't use libev
936 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
937 * libev, in which cases the memory fences become nops.
938 * alternatively, you can remove this #error and link against libpthread,
939 * which will then provide the memory fences.
940 */
941# error "memory fences not defined for your architecture, please report"
942#endif
943
944#ifndef ECB_MEMORY_FENCE
945# define ECB_MEMORY_FENCE do { } while (0)
946# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
947# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
948#endif
949
950#define expect_false(cond) ecb_expect_false (cond)
951#define expect_true(cond) ecb_expect_true (cond)
952#define noinline ecb_noinline
953
954#define inline_size ecb_inline
955
956#if EV_FEATURE_CODE
957# define inline_speed ecb_inline
958#else
959# define inline_speed static noinline
960#endif
961
197#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 962#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
963
964#if EV_MINPRI == EV_MAXPRI
965# define ABSPRI(w) (((W)w), 0)
966#else
198#define ABSPRI(w) ((w)->priority - EV_MINPRI) 967# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
968#endif
199 969
200#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 970#define EMPTY /* required for microsofts broken pseudo-c compiler */
201#define EMPTY2(a,b) /* used to suppress some warnings */ 971#define EMPTY2(a,b) /* used to suppress some warnings */
202 972
203typedef struct ev_watcher *W; 973typedef ev_watcher *W;
204typedef struct ev_watcher_list *WL; 974typedef ev_watcher_list *WL;
205typedef struct ev_watcher_time *WT; 975typedef ev_watcher_time *WT;
206 976
977#define ev_active(w) ((W)(w))->active
978#define ev_at(w) ((WT)(w))->at
979
980#if EV_USE_REALTIME
981/* sig_atomic_t is used to avoid per-thread variables or locking but still */
982/* giving it a reasonably high chance of working on typical architectures */
983static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
984#endif
985
986#if EV_USE_MONOTONIC
207static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 987static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
988#endif
989
990#ifndef EV_FD_TO_WIN32_HANDLE
991# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
992#endif
993#ifndef EV_WIN32_HANDLE_TO_FD
994# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
995#endif
996#ifndef EV_WIN32_CLOSE_FD
997# define EV_WIN32_CLOSE_FD(fd) close (fd)
998#endif
208 999
209#ifdef _WIN32 1000#ifdef _WIN32
210# include "ev_win32.c" 1001# include "ev_win32.c"
211#endif 1002#endif
212 1003
213/*****************************************************************************/ 1004/*****************************************************************************/
214 1005
1006/* define a suitable floor function (only used by periodics atm) */
1007
1008#if EV_USE_FLOOR
1009# include <math.h>
1010# define ev_floor(v) floor (v)
1011#else
1012
1013#include <float.h>
1014
1015/* a floor() replacement function, should be independent of ev_tstamp type */
1016static ev_tstamp noinline
1017ev_floor (ev_tstamp v)
1018{
1019 /* the choice of shift factor is not terribly important */
1020#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1021 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1022#else
1023 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1024#endif
1025
1026 /* argument too large for an unsigned long? */
1027 if (expect_false (v >= shift))
1028 {
1029 ev_tstamp f;
1030
1031 if (v == v - 1.)
1032 return v; /* very large number */
1033
1034 f = shift * ev_floor (v * (1. / shift));
1035 return f + ev_floor (v - f);
1036 }
1037
1038 /* special treatment for negative args? */
1039 if (expect_false (v < 0.))
1040 {
1041 ev_tstamp f = -ev_floor (-v);
1042
1043 return f - (f == v ? 0 : 1);
1044 }
1045
1046 /* fits into an unsigned long */
1047 return (unsigned long)v;
1048}
1049
1050#endif
1051
1052/*****************************************************************************/
1053
1054#ifdef __linux
1055# include <sys/utsname.h>
1056#endif
1057
1058static unsigned int noinline ecb_cold
1059ev_linux_version (void)
1060{
1061#ifdef __linux
1062 unsigned int v = 0;
1063 struct utsname buf;
1064 int i;
1065 char *p = buf.release;
1066
1067 if (uname (&buf))
1068 return 0;
1069
1070 for (i = 3+1; --i; )
1071 {
1072 unsigned int c = 0;
1073
1074 for (;;)
1075 {
1076 if (*p >= '0' && *p <= '9')
1077 c = c * 10 + *p++ - '0';
1078 else
1079 {
1080 p += *p == '.';
1081 break;
1082 }
1083 }
1084
1085 v = (v << 8) | c;
1086 }
1087
1088 return v;
1089#else
1090 return 0;
1091#endif
1092}
1093
1094/*****************************************************************************/
1095
1096#if EV_AVOID_STDIO
1097static void noinline ecb_cold
1098ev_printerr (const char *msg)
1099{
1100 write (STDERR_FILENO, msg, strlen (msg));
1101}
1102#endif
1103
215static void (*syserr_cb)(const char *msg); 1104static void (*syserr_cb)(const char *msg);
216 1105
1106void ecb_cold
217void ev_set_syserr_cb (void (*cb)(const char *msg)) 1107ev_set_syserr_cb (void (*cb)(const char *msg))
218{ 1108{
219 syserr_cb = cb; 1109 syserr_cb = cb;
220} 1110}
221 1111
222static void 1112static void noinline ecb_cold
223syserr (const char *msg) 1113ev_syserr (const char *msg)
224{ 1114{
225 if (!msg) 1115 if (!msg)
226 msg = "(libev) system error"; 1116 msg = "(libev) system error";
227 1117
228 if (syserr_cb) 1118 if (syserr_cb)
229 syserr_cb (msg); 1119 syserr_cb (msg);
230 else 1120 else
231 { 1121 {
1122#if EV_AVOID_STDIO
1123 ev_printerr (msg);
1124 ev_printerr (": ");
1125 ev_printerr (strerror (errno));
1126 ev_printerr ("\n");
1127#else
232 perror (msg); 1128 perror (msg);
1129#endif
233 abort (); 1130 abort ();
234 } 1131 }
235} 1132}
236 1133
1134static void *
1135ev_realloc_emul (void *ptr, long size)
1136{
1137#if __GLIBC__
1138 return realloc (ptr, size);
1139#else
1140 /* some systems, notably openbsd and darwin, fail to properly
1141 * implement realloc (x, 0) (as required by both ansi c-89 and
1142 * the single unix specification, so work around them here.
1143 */
1144
1145 if (size)
1146 return realloc (ptr, size);
1147
1148 free (ptr);
1149 return 0;
1150#endif
1151}
1152
237static void *(*alloc)(void *ptr, long size); 1153static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
238 1154
1155void ecb_cold
239void ev_set_allocator (void *(*cb)(void *ptr, long size)) 1156ev_set_allocator (void *(*cb)(void *ptr, long size))
240{ 1157{
241 alloc = cb; 1158 alloc = cb;
242} 1159}
243 1160
244static void * 1161inline_speed void *
245ev_realloc (void *ptr, long size) 1162ev_realloc (void *ptr, long size)
246{ 1163{
247 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1164 ptr = alloc (ptr, size);
248 1165
249 if (!ptr && size) 1166 if (!ptr && size)
250 { 1167 {
1168#if EV_AVOID_STDIO
1169 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1170#else
251 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1171 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1172#endif
252 abort (); 1173 abort ();
253 } 1174 }
254 1175
255 return ptr; 1176 return ptr;
256} 1177}
… …
258#define ev_malloc(size) ev_realloc (0, (size)) 1179#define ev_malloc(size) ev_realloc (0, (size))
259#define ev_free(ptr) ev_realloc ((ptr), 0) 1180#define ev_free(ptr) ev_realloc ((ptr), 0)
260 1181
261/*****************************************************************************/ 1182/*****************************************************************************/
262 1183
1184/* set in reify when reification needed */
1185#define EV_ANFD_REIFY 1
1186
1187/* file descriptor info structure */
263typedef struct 1188typedef struct
264{ 1189{
265 WL head; 1190 WL head;
266 unsigned char events; 1191 unsigned char events; /* the events watched for */
1192 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1193 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
267 unsigned char reify; 1194 unsigned char unused;
1195#if EV_USE_EPOLL
1196 unsigned int egen; /* generation counter to counter epoll bugs */
1197#endif
268#if EV_SELECT_IS_WINSOCKET 1198#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
269 SOCKET handle; 1199 SOCKET handle;
270#endif 1200#endif
1201#if EV_USE_IOCP
1202 OVERLAPPED or, ow;
1203#endif
271} ANFD; 1204} ANFD;
272 1205
1206/* stores the pending event set for a given watcher */
273typedef struct 1207typedef struct
274{ 1208{
275 W w; 1209 W w;
276 int events; 1210 int events; /* the pending event set for the given watcher */
277} ANPENDING; 1211} ANPENDING;
1212
1213#if EV_USE_INOTIFY
1214/* hash table entry per inotify-id */
1215typedef struct
1216{
1217 WL head;
1218} ANFS;
1219#endif
1220
1221/* Heap Entry */
1222#if EV_HEAP_CACHE_AT
1223 /* a heap element */
1224 typedef struct {
1225 ev_tstamp at;
1226 WT w;
1227 } ANHE;
1228
1229 #define ANHE_w(he) (he).w /* access watcher, read-write */
1230 #define ANHE_at(he) (he).at /* access cached at, read-only */
1231 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1232#else
1233 /* a heap element */
1234 typedef WT ANHE;
1235
1236 #define ANHE_w(he) (he)
1237 #define ANHE_at(he) (he)->at
1238 #define ANHE_at_cache(he)
1239#endif
278 1240
279#if EV_MULTIPLICITY 1241#if EV_MULTIPLICITY
280 1242
281 struct ev_loop 1243 struct ev_loop
282 { 1244 {
… …
287 #undef VAR 1249 #undef VAR
288 }; 1250 };
289 #include "ev_wrap.h" 1251 #include "ev_wrap.h"
290 1252
291 static struct ev_loop default_loop_struct; 1253 static struct ev_loop default_loop_struct;
292 struct ev_loop *ev_default_loop_ptr; 1254 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
293 1255
294#else 1256#else
295 1257
296 ev_tstamp ev_rt_now; 1258 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
297 #define VAR(name,decl) static decl; 1259 #define VAR(name,decl) static decl;
298 #include "ev_vars.h" 1260 #include "ev_vars.h"
299 #undef VAR 1261 #undef VAR
300 1262
301 static int ev_default_loop_ptr; 1263 static int ev_default_loop_ptr;
302 1264
303#endif 1265#endif
304 1266
1267#if EV_FEATURE_API
1268# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1269# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1270# define EV_INVOKE_PENDING invoke_cb (EV_A)
1271#else
1272# define EV_RELEASE_CB (void)0
1273# define EV_ACQUIRE_CB (void)0
1274# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1275#endif
1276
1277#define EVBREAK_RECURSE 0x80
1278
305/*****************************************************************************/ 1279/*****************************************************************************/
306 1280
1281#ifndef EV_HAVE_EV_TIME
307ev_tstamp 1282ev_tstamp
308ev_time (void) 1283ev_time (void)
309{ 1284{
310#if EV_USE_REALTIME 1285#if EV_USE_REALTIME
1286 if (expect_true (have_realtime))
1287 {
311 struct timespec ts; 1288 struct timespec ts;
312 clock_gettime (CLOCK_REALTIME, &ts); 1289 clock_gettime (CLOCK_REALTIME, &ts);
313 return ts.tv_sec + ts.tv_nsec * 1e-9; 1290 return ts.tv_sec + ts.tv_nsec * 1e-9;
314#else 1291 }
1292#endif
1293
315 struct timeval tv; 1294 struct timeval tv;
316 gettimeofday (&tv, 0); 1295 gettimeofday (&tv, 0);
317 return tv.tv_sec + tv.tv_usec * 1e-6; 1296 return tv.tv_sec + tv.tv_usec * 1e-6;
318#endif
319} 1297}
1298#endif
320 1299
321inline ev_tstamp 1300inline_size ev_tstamp
322get_clock (void) 1301get_clock (void)
323{ 1302{
324#if EV_USE_MONOTONIC 1303#if EV_USE_MONOTONIC
325 if (expect_true (have_monotonic)) 1304 if (expect_true (have_monotonic))
326 { 1305 {
… …
339{ 1318{
340 return ev_rt_now; 1319 return ev_rt_now;
341} 1320}
342#endif 1321#endif
343 1322
344#define array_roundsize(type,n) (((n) | 4) & ~3) 1323void
1324ev_sleep (ev_tstamp delay)
1325{
1326 if (delay > 0.)
1327 {
1328#if EV_USE_NANOSLEEP
1329 struct timespec ts;
1330
1331 EV_TS_SET (ts, delay);
1332 nanosleep (&ts, 0);
1333#elif defined(_WIN32)
1334 Sleep ((unsigned long)(delay * 1e3));
1335#else
1336 struct timeval tv;
1337
1338 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1339 /* something not guaranteed by newer posix versions, but guaranteed */
1340 /* by older ones */
1341 EV_TV_SET (tv, delay);
1342 select (0, 0, 0, 0, &tv);
1343#endif
1344 }
1345}
1346
1347/*****************************************************************************/
1348
1349#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1350
1351/* find a suitable new size for the given array, */
1352/* hopefully by rounding to a nice-to-malloc size */
1353inline_size int
1354array_nextsize (int elem, int cur, int cnt)
1355{
1356 int ncur = cur + 1;
1357
1358 do
1359 ncur <<= 1;
1360 while (cnt > ncur);
1361
1362 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1363 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1364 {
1365 ncur *= elem;
1366 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1367 ncur = ncur - sizeof (void *) * 4;
1368 ncur /= elem;
1369 }
1370
1371 return ncur;
1372}
1373
1374static void * noinline ecb_cold
1375array_realloc (int elem, void *base, int *cur, int cnt)
1376{
1377 *cur = array_nextsize (elem, *cur, cnt);
1378 return ev_realloc (base, elem * *cur);
1379}
1380
1381#define array_init_zero(base,count) \
1382 memset ((void *)(base), 0, sizeof (*(base)) * (count))
345 1383
346#define array_needsize(type,base,cur,cnt,init) \ 1384#define array_needsize(type,base,cur,cnt,init) \
347 if (expect_false ((cnt) > cur)) \ 1385 if (expect_false ((cnt) > (cur))) \
348 { \ 1386 { \
349 int newcnt = cur; \ 1387 int ecb_unused ocur_ = (cur); \
350 do \ 1388 (base) = (type *)array_realloc \
351 { \ 1389 (sizeof (type), (base), &(cur), (cnt)); \
352 newcnt = array_roundsize (type, newcnt << 1); \ 1390 init ((base) + (ocur_), (cur) - ocur_); \
353 } \
354 while ((cnt) > newcnt); \
355 \
356 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
357 init (base + cur, newcnt - cur); \
358 cur = newcnt; \
359 } 1391 }
360 1392
1393#if 0
361#define array_slim(type,stem) \ 1394#define array_slim(type,stem) \
362 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1395 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
363 { \ 1396 { \
364 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1397 stem ## max = array_roundsize (stem ## cnt >> 1); \
365 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1398 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
366 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1399 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
367 } 1400 }
1401#endif
368 1402
369#define array_free(stem, idx) \ 1403#define array_free(stem, idx) \
370 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1404 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
371 1405
372/*****************************************************************************/ 1406/*****************************************************************************/
373 1407
374static void 1408/* dummy callback for pending events */
375anfds_init (ANFD *base, int count) 1409static void noinline
1410pendingcb (EV_P_ ev_prepare *w, int revents)
376{ 1411{
377 while (count--)
378 {
379 base->head = 0;
380 base->events = EV_NONE;
381 base->reify = 0;
382
383 ++base;
384 }
385} 1412}
386 1413
387void 1414void noinline
388ev_feed_event (EV_P_ void *w, int revents) 1415ev_feed_event (EV_P_ void *w, int revents)
389{ 1416{
390 W w_ = (W)w; 1417 W w_ = (W)w;
1418 int pri = ABSPRI (w_);
391 1419
392 if (expect_false (w_->pending)) 1420 if (expect_false (w_->pending))
1421 pendings [pri][w_->pending - 1].events |= revents;
1422 else
393 { 1423 {
1424 w_->pending = ++pendingcnt [pri];
1425 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1426 pendings [pri][w_->pending - 1].w = w_;
394 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1427 pendings [pri][w_->pending - 1].events = revents;
395 return;
396 } 1428 }
397
398 w_->pending = ++pendingcnt [ABSPRI (w_)];
399 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
400 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
401 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
402} 1429}
403 1430
404static void 1431inline_speed void
1432feed_reverse (EV_P_ W w)
1433{
1434 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1435 rfeeds [rfeedcnt++] = w;
1436}
1437
1438inline_size void
1439feed_reverse_done (EV_P_ int revents)
1440{
1441 do
1442 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1443 while (rfeedcnt);
1444}
1445
1446inline_speed void
405queue_events (EV_P_ W *events, int eventcnt, int type) 1447queue_events (EV_P_ W *events, int eventcnt, int type)
406{ 1448{
407 int i; 1449 int i;
408 1450
409 for (i = 0; i < eventcnt; ++i) 1451 for (i = 0; i < eventcnt; ++i)
410 ev_feed_event (EV_A_ events [i], type); 1452 ev_feed_event (EV_A_ events [i], type);
411} 1453}
412 1454
1455/*****************************************************************************/
1456
413inline void 1457inline_speed void
414fd_event (EV_P_ int fd, int revents) 1458fd_event_nocheck (EV_P_ int fd, int revents)
415{ 1459{
416 ANFD *anfd = anfds + fd; 1460 ANFD *anfd = anfds + fd;
417 struct ev_io *w; 1461 ev_io *w;
418 1462
419 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 1463 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
420 { 1464 {
421 int ev = w->events & revents; 1465 int ev = w->events & revents;
422 1466
423 if (ev) 1467 if (ev)
424 ev_feed_event (EV_A_ (W)w, ev); 1468 ev_feed_event (EV_A_ (W)w, ev);
425 } 1469 }
426} 1470}
427 1471
1472/* do not submit kernel events for fds that have reify set */
1473/* because that means they changed while we were polling for new events */
1474inline_speed void
1475fd_event (EV_P_ int fd, int revents)
1476{
1477 ANFD *anfd = anfds + fd;
1478
1479 if (expect_true (!anfd->reify))
1480 fd_event_nocheck (EV_A_ fd, revents);
1481}
1482
428void 1483void
429ev_feed_fd_event (EV_P_ int fd, int revents) 1484ev_feed_fd_event (EV_P_ int fd, int revents)
430{ 1485{
1486 if (fd >= 0 && fd < anfdmax)
431 fd_event (EV_A_ fd, revents); 1487 fd_event_nocheck (EV_A_ fd, revents);
432} 1488}
433 1489
434/*****************************************************************************/ 1490/* make sure the external fd watch events are in-sync */
435 1491/* with the kernel/libev internal state */
436inline void 1492inline_size void
437fd_reify (EV_P) 1493fd_reify (EV_P)
438{ 1494{
439 int i; 1495 int i;
440 1496
1497#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
441 for (i = 0; i < fdchangecnt; ++i) 1498 for (i = 0; i < fdchangecnt; ++i)
442 { 1499 {
443 int fd = fdchanges [i]; 1500 int fd = fdchanges [i];
444 ANFD *anfd = anfds + fd; 1501 ANFD *anfd = anfds + fd;
445 struct ev_io *w;
446 1502
447 int events = 0; 1503 if (anfd->reify & EV__IOFDSET && anfd->head)
448
449 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
450 events |= w->events;
451
452#if EV_SELECT_IS_WINSOCKET
453 if (events)
454 { 1504 {
1505 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1506
1507 if (handle != anfd->handle)
1508 {
455 unsigned long argp; 1509 unsigned long arg;
456 anfd->handle = _get_osfhandle (fd); 1510
457 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1511 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1512
1513 /* handle changed, but fd didn't - we need to do it in two steps */
1514 backend_modify (EV_A_ fd, anfd->events, 0);
1515 anfd->events = 0;
1516 anfd->handle = handle;
1517 }
458 } 1518 }
1519 }
459#endif 1520#endif
460 1521
1522 for (i = 0; i < fdchangecnt; ++i)
1523 {
1524 int fd = fdchanges [i];
1525 ANFD *anfd = anfds + fd;
1526 ev_io *w;
1527
1528 unsigned char o_events = anfd->events;
1529 unsigned char o_reify = anfd->reify;
1530
461 anfd->reify = 0; 1531 anfd->reify = 0;
462 1532
463 method_modify (EV_A_ fd, anfd->events, events); 1533 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1534 {
464 anfd->events = events; 1535 anfd->events = 0;
1536
1537 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1538 anfd->events |= (unsigned char)w->events;
1539
1540 if (o_events != anfd->events)
1541 o_reify = EV__IOFDSET; /* actually |= */
1542 }
1543
1544 if (o_reify & EV__IOFDSET)
1545 backend_modify (EV_A_ fd, o_events, anfd->events);
465 } 1546 }
466 1547
467 fdchangecnt = 0; 1548 fdchangecnt = 0;
468} 1549}
469 1550
470static void 1551/* something about the given fd changed */
1552inline_size void
471fd_change (EV_P_ int fd) 1553fd_change (EV_P_ int fd, int flags)
472{ 1554{
473 if (expect_false (anfds [fd].reify)) 1555 unsigned char reify = anfds [fd].reify;
474 return;
475
476 anfds [fd].reify = 1; 1556 anfds [fd].reify |= flags;
477 1557
1558 if (expect_true (!reify))
1559 {
478 ++fdchangecnt; 1560 ++fdchangecnt;
479 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1561 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
480 fdchanges [fdchangecnt - 1] = fd; 1562 fdchanges [fdchangecnt - 1] = fd;
1563 }
481} 1564}
482 1565
483static void 1566/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1567inline_speed void ecb_cold
484fd_kill (EV_P_ int fd) 1568fd_kill (EV_P_ int fd)
485{ 1569{
486 struct ev_io *w; 1570 ev_io *w;
487 1571
488 while ((w = (struct ev_io *)anfds [fd].head)) 1572 while ((w = (ev_io *)anfds [fd].head))
489 { 1573 {
490 ev_io_stop (EV_A_ w); 1574 ev_io_stop (EV_A_ w);
491 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1575 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
492 } 1576 }
493} 1577}
494 1578
495inline int 1579/* check whether the given fd is actually valid, for error recovery */
1580inline_size int ecb_cold
496fd_valid (int fd) 1581fd_valid (int fd)
497{ 1582{
498#ifdef _WIN32 1583#ifdef _WIN32
499 return _get_osfhandle (fd) != -1; 1584 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
500#else 1585#else
501 return fcntl (fd, F_GETFD) != -1; 1586 return fcntl (fd, F_GETFD) != -1;
502#endif 1587#endif
503} 1588}
504 1589
505/* called on EBADF to verify fds */ 1590/* called on EBADF to verify fds */
506static void 1591static void noinline ecb_cold
507fd_ebadf (EV_P) 1592fd_ebadf (EV_P)
508{ 1593{
509 int fd; 1594 int fd;
510 1595
511 for (fd = 0; fd < anfdmax; ++fd) 1596 for (fd = 0; fd < anfdmax; ++fd)
512 if (anfds [fd].events) 1597 if (anfds [fd].events)
513 if (!fd_valid (fd) == -1 && errno == EBADF) 1598 if (!fd_valid (fd) && errno == EBADF)
514 fd_kill (EV_A_ fd); 1599 fd_kill (EV_A_ fd);
515} 1600}
516 1601
517/* called on ENOMEM in select/poll to kill some fds and retry */ 1602/* called on ENOMEM in select/poll to kill some fds and retry */
518static void 1603static void noinline ecb_cold
519fd_enomem (EV_P) 1604fd_enomem (EV_P)
520{ 1605{
521 int fd; 1606 int fd;
522 1607
523 for (fd = anfdmax; fd--; ) 1608 for (fd = anfdmax; fd--; )
524 if (anfds [fd].events) 1609 if (anfds [fd].events)
525 { 1610 {
526 fd_kill (EV_A_ fd); 1611 fd_kill (EV_A_ fd);
527 return; 1612 break;
528 } 1613 }
529} 1614}
530 1615
531/* usually called after fork if method needs to re-arm all fds from scratch */ 1616/* usually called after fork if backend needs to re-arm all fds from scratch */
532static void 1617static void noinline
533fd_rearm_all (EV_P) 1618fd_rearm_all (EV_P)
534{ 1619{
535 int fd; 1620 int fd;
536 1621
537 /* this should be highly optimised to not do anything but set a flag */
538 for (fd = 0; fd < anfdmax; ++fd) 1622 for (fd = 0; fd < anfdmax; ++fd)
539 if (anfds [fd].events) 1623 if (anfds [fd].events)
540 { 1624 {
541 anfds [fd].events = 0; 1625 anfds [fd].events = 0;
542 fd_change (EV_A_ fd); 1626 anfds [fd].emask = 0;
1627 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
543 } 1628 }
544} 1629}
545 1630
546/*****************************************************************************/ 1631/* used to prepare libev internal fd's */
547 1632/* this is not fork-safe */
548static void
549upheap (WT *heap, int k)
550{
551 WT w = heap [k];
552
553 while (k && heap [k >> 1]->at > w->at)
554 {
555 heap [k] = heap [k >> 1];
556 ((W)heap [k])->active = k + 1;
557 k >>= 1;
558 }
559
560 heap [k] = w;
561 ((W)heap [k])->active = k + 1;
562
563}
564
565static void
566downheap (WT *heap, int N, int k)
567{
568 WT w = heap [k];
569
570 while (k < (N >> 1))
571 {
572 int j = k << 1;
573
574 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
575 ++j;
576
577 if (w->at <= heap [j]->at)
578 break;
579
580 heap [k] = heap [j];
581 ((W)heap [k])->active = k + 1;
582 k = j;
583 }
584
585 heap [k] = w;
586 ((W)heap [k])->active = k + 1;
587}
588
589inline void 1633inline_speed void
590adjustheap (WT *heap, int N, int k)
591{
592 upheap (heap, k);
593 downheap (heap, N, k);
594}
595
596/*****************************************************************************/
597
598typedef struct
599{
600 WL head;
601 sig_atomic_t volatile gotsig;
602} ANSIG;
603
604static ANSIG *signals;
605static int signalmax;
606
607static int sigpipe [2];
608static sig_atomic_t volatile gotsig;
609static struct ev_io sigev;
610
611static void
612signals_init (ANSIG *base, int count)
613{
614 while (count--)
615 {
616 base->head = 0;
617 base->gotsig = 0;
618
619 ++base;
620 }
621}
622
623static void
624sighandler (int signum)
625{
626#if _WIN32
627 signal (signum, sighandler);
628#endif
629
630 signals [signum - 1].gotsig = 1;
631
632 if (!gotsig)
633 {
634 int old_errno = errno;
635 gotsig = 1;
636 write (sigpipe [1], &signum, 1);
637 errno = old_errno;
638 }
639}
640
641void
642ev_feed_signal_event (EV_P_ int signum)
643{
644 WL w;
645
646#if EV_MULTIPLICITY
647 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
648#endif
649
650 --signum;
651
652 if (signum < 0 || signum >= signalmax)
653 return;
654
655 signals [signum].gotsig = 0;
656
657 for (w = signals [signum].head; w; w = w->next)
658 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
659}
660
661static void
662sigcb (EV_P_ struct ev_io *iow, int revents)
663{
664 int signum;
665
666 read (sigpipe [0], &revents, 1);
667 gotsig = 0;
668
669 for (signum = signalmax; signum--; )
670 if (signals [signum].gotsig)
671 ev_feed_signal_event (EV_A_ signum + 1);
672}
673
674static void
675fd_intern (int fd) 1634fd_intern (int fd)
676{ 1635{
677#ifdef _WIN32 1636#ifdef _WIN32
678 int arg = 1; 1637 unsigned long arg = 1;
679 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1638 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
680#else 1639#else
681 fcntl (fd, F_SETFD, FD_CLOEXEC); 1640 fcntl (fd, F_SETFD, FD_CLOEXEC);
682 fcntl (fd, F_SETFL, O_NONBLOCK); 1641 fcntl (fd, F_SETFL, O_NONBLOCK);
683#endif 1642#endif
684} 1643}
685 1644
1645/*****************************************************************************/
1646
1647/*
1648 * the heap functions want a real array index. array index 0 is guaranteed to not
1649 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1650 * the branching factor of the d-tree.
1651 */
1652
1653/*
1654 * at the moment we allow libev the luxury of two heaps,
1655 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1656 * which is more cache-efficient.
1657 * the difference is about 5% with 50000+ watchers.
1658 */
1659#if EV_USE_4HEAP
1660
1661#define DHEAP 4
1662#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1663#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1664#define UPHEAP_DONE(p,k) ((p) == (k))
1665
1666/* away from the root */
1667inline_speed void
1668downheap (ANHE *heap, int N, int k)
1669{
1670 ANHE he = heap [k];
1671 ANHE *E = heap + N + HEAP0;
1672
1673 for (;;)
1674 {
1675 ev_tstamp minat;
1676 ANHE *minpos;
1677 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1678
1679 /* find minimum child */
1680 if (expect_true (pos + DHEAP - 1 < E))
1681 {
1682 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1683 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1684 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1685 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1686 }
1687 else if (pos < E)
1688 {
1689 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1690 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1691 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1692 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1693 }
1694 else
1695 break;
1696
1697 if (ANHE_at (he) <= minat)
1698 break;
1699
1700 heap [k] = *minpos;
1701 ev_active (ANHE_w (*minpos)) = k;
1702
1703 k = minpos - heap;
1704 }
1705
1706 heap [k] = he;
1707 ev_active (ANHE_w (he)) = k;
1708}
1709
1710#else /* 4HEAP */
1711
1712#define HEAP0 1
1713#define HPARENT(k) ((k) >> 1)
1714#define UPHEAP_DONE(p,k) (!(p))
1715
1716/* away from the root */
1717inline_speed void
1718downheap (ANHE *heap, int N, int k)
1719{
1720 ANHE he = heap [k];
1721
1722 for (;;)
1723 {
1724 int c = k << 1;
1725
1726 if (c >= N + HEAP0)
1727 break;
1728
1729 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1730 ? 1 : 0;
1731
1732 if (ANHE_at (he) <= ANHE_at (heap [c]))
1733 break;
1734
1735 heap [k] = heap [c];
1736 ev_active (ANHE_w (heap [k])) = k;
1737
1738 k = c;
1739 }
1740
1741 heap [k] = he;
1742 ev_active (ANHE_w (he)) = k;
1743}
1744#endif
1745
1746/* towards the root */
1747inline_speed void
1748upheap (ANHE *heap, int k)
1749{
1750 ANHE he = heap [k];
1751
1752 for (;;)
1753 {
1754 int p = HPARENT (k);
1755
1756 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1757 break;
1758
1759 heap [k] = heap [p];
1760 ev_active (ANHE_w (heap [k])) = k;
1761 k = p;
1762 }
1763
1764 heap [k] = he;
1765 ev_active (ANHE_w (he)) = k;
1766}
1767
1768/* move an element suitably so it is in a correct place */
1769inline_size void
1770adjustheap (ANHE *heap, int N, int k)
1771{
1772 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1773 upheap (heap, k);
1774 else
1775 downheap (heap, N, k);
1776}
1777
1778/* rebuild the heap: this function is used only once and executed rarely */
1779inline_size void
1780reheap (ANHE *heap, int N)
1781{
1782 int i;
1783
1784 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1785 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1786 for (i = 0; i < N; ++i)
1787 upheap (heap, i + HEAP0);
1788}
1789
1790/*****************************************************************************/
1791
1792/* associate signal watchers to a signal signal */
1793typedef struct
1794{
1795 EV_ATOMIC_T pending;
1796#if EV_MULTIPLICITY
1797 EV_P;
1798#endif
1799 WL head;
1800} ANSIG;
1801
1802static ANSIG signals [EV_NSIG - 1];
1803
1804/*****************************************************************************/
1805
1806#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1807
1808static void noinline ecb_cold
1809evpipe_init (EV_P)
1810{
1811 if (!ev_is_active (&pipe_w))
1812 {
1813# if EV_USE_EVENTFD
1814 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1815 if (evfd < 0 && errno == EINVAL)
1816 evfd = eventfd (0, 0);
1817
1818 if (evfd >= 0)
1819 {
1820 evpipe [0] = -1;
1821 fd_intern (evfd); /* doing it twice doesn't hurt */
1822 ev_io_set (&pipe_w, evfd, EV_READ);
1823 }
1824 else
1825# endif
1826 {
1827 while (pipe (evpipe))
1828 ev_syserr ("(libev) error creating signal/async pipe");
1829
1830 fd_intern (evpipe [0]);
1831 fd_intern (evpipe [1]);
1832 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1833 }
1834
1835 ev_io_start (EV_A_ &pipe_w);
1836 ev_unref (EV_A); /* watcher should not keep loop alive */
1837 }
1838}
1839
1840inline_speed void
1841evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1842{
1843 if (expect_true (*flag))
1844 return;
1845
1846 *flag = 1;
1847
1848 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1849
1850 pipe_write_skipped = 1;
1851
1852 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1853
1854 if (pipe_write_wanted)
1855 {
1856 int old_errno;
1857
1858 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1859
1860 old_errno = errno; /* save errno because write will clobber it */
1861
1862#if EV_USE_EVENTFD
1863 if (evfd >= 0)
1864 {
1865 uint64_t counter = 1;
1866 write (evfd, &counter, sizeof (uint64_t));
1867 }
1868 else
1869#endif
1870 {
1871 /* win32 people keep sending patches that change this write() to send() */
1872 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1873 /* so when you think this write should be a send instead, please find out */
1874 /* where your send() is from - it's definitely not the microsoft send, and */
1875 /* tell me. thank you. */
1876 write (evpipe [1], &(evpipe [1]), 1);
1877 }
1878
1879 errno = old_errno;
1880 }
1881}
1882
1883/* called whenever the libev signal pipe */
1884/* got some events (signal, async) */
686static void 1885static void
687siginit (EV_P) 1886pipecb (EV_P_ ev_io *iow, int revents)
688{ 1887{
689 fd_intern (sigpipe [0]); 1888 int i;
690 fd_intern (sigpipe [1]);
691 1889
692 ev_io_set (&sigev, sigpipe [0], EV_READ); 1890 if (revents & EV_READ)
693 ev_io_start (EV_A_ &sigev); 1891 {
694 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1892#if EV_USE_EVENTFD
1893 if (evfd >= 0)
1894 {
1895 uint64_t counter;
1896 read (evfd, &counter, sizeof (uint64_t));
1897 }
1898 else
1899#endif
1900 {
1901 char dummy;
1902 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1903 read (evpipe [0], &dummy, 1);
1904 }
1905 }
1906
1907 pipe_write_skipped = 0;
1908
1909#if EV_SIGNAL_ENABLE
1910 if (sig_pending)
1911 {
1912 sig_pending = 0;
1913
1914 for (i = EV_NSIG - 1; i--; )
1915 if (expect_false (signals [i].pending))
1916 ev_feed_signal_event (EV_A_ i + 1);
1917 }
1918#endif
1919
1920#if EV_ASYNC_ENABLE
1921 if (async_pending)
1922 {
1923 async_pending = 0;
1924
1925 for (i = asynccnt; i--; )
1926 if (asyncs [i]->sent)
1927 {
1928 asyncs [i]->sent = 0;
1929 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1930 }
1931 }
1932#endif
695} 1933}
696 1934
697/*****************************************************************************/ 1935/*****************************************************************************/
698 1936
699static struct ev_child *childs [PID_HASHSIZE]; 1937void
1938ev_feed_signal (int signum)
1939{
1940#if EV_MULTIPLICITY
1941 EV_P = signals [signum - 1].loop;
700 1942
1943 if (!EV_A)
1944 return;
1945#endif
1946
1947 if (!ev_active (&pipe_w))
1948 return;
1949
1950 signals [signum - 1].pending = 1;
1951 evpipe_write (EV_A_ &sig_pending);
1952}
1953
1954static void
1955ev_sighandler (int signum)
1956{
701#ifndef _WIN32 1957#ifdef _WIN32
1958 signal (signum, ev_sighandler);
1959#endif
702 1960
1961 ev_feed_signal (signum);
1962}
1963
1964void noinline
1965ev_feed_signal_event (EV_P_ int signum)
1966{
1967 WL w;
1968
1969 if (expect_false (signum <= 0 || signum > EV_NSIG))
1970 return;
1971
1972 --signum;
1973
1974#if EV_MULTIPLICITY
1975 /* it is permissible to try to feed a signal to the wrong loop */
1976 /* or, likely more useful, feeding a signal nobody is waiting for */
1977
1978 if (expect_false (signals [signum].loop != EV_A))
1979 return;
1980#endif
1981
1982 signals [signum].pending = 0;
1983
1984 for (w = signals [signum].head; w; w = w->next)
1985 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1986}
1987
1988#if EV_USE_SIGNALFD
1989static void
1990sigfdcb (EV_P_ ev_io *iow, int revents)
1991{
1992 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1993
1994 for (;;)
1995 {
1996 ssize_t res = read (sigfd, si, sizeof (si));
1997
1998 /* not ISO-C, as res might be -1, but works with SuS */
1999 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2000 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2001
2002 if (res < (ssize_t)sizeof (si))
2003 break;
2004 }
2005}
2006#endif
2007
2008#endif
2009
2010/*****************************************************************************/
2011
2012#if EV_CHILD_ENABLE
2013static WL childs [EV_PID_HASHSIZE];
2014
703static struct ev_signal childev; 2015static ev_signal childev;
2016
2017#ifndef WIFCONTINUED
2018# define WIFCONTINUED(status) 0
2019#endif
2020
2021/* handle a single child status event */
2022inline_speed void
2023child_reap (EV_P_ int chain, int pid, int status)
2024{
2025 ev_child *w;
2026 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2027
2028 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2029 {
2030 if ((w->pid == pid || !w->pid)
2031 && (!traced || (w->flags & 1)))
2032 {
2033 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2034 w->rpid = pid;
2035 w->rstatus = status;
2036 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2037 }
2038 }
2039}
704 2040
705#ifndef WCONTINUED 2041#ifndef WCONTINUED
706# define WCONTINUED 0 2042# define WCONTINUED 0
707#endif 2043#endif
708 2044
2045/* called on sigchld etc., calls waitpid */
709static void 2046static void
710child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
711{
712 struct ev_child *w;
713
714 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
715 if (w->pid == pid || !w->pid)
716 {
717 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
718 w->rpid = pid;
719 w->rstatus = status;
720 ev_feed_event (EV_A_ (W)w, EV_CHILD);
721 }
722}
723
724static void
725childcb (EV_P_ struct ev_signal *sw, int revents) 2047childcb (EV_P_ ev_signal *sw, int revents)
726{ 2048{
727 int pid, status; 2049 int pid, status;
728 2050
2051 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
729 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 2052 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
730 { 2053 if (!WCONTINUED
2054 || errno != EINVAL
2055 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2056 return;
2057
731 /* make sure we are called again until all childs have been reaped */ 2058 /* make sure we are called again until all children have been reaped */
2059 /* we need to do it this way so that the callback gets called before we continue */
732 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2060 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
733 2061
734 child_reap (EV_A_ sw, pid, pid, status); 2062 child_reap (EV_A_ pid, pid, status);
2063 if ((EV_PID_HASHSIZE) > 1)
735 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 2064 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
736 }
737} 2065}
738 2066
739#endif 2067#endif
740 2068
741/*****************************************************************************/ 2069/*****************************************************************************/
742 2070
2071#if EV_USE_IOCP
2072# include "ev_iocp.c"
2073#endif
743#if EV_USE_PORT 2074#if EV_USE_PORT
744# include "ev_port.c" 2075# include "ev_port.c"
745#endif 2076#endif
746#if EV_USE_KQUEUE 2077#if EV_USE_KQUEUE
747# include "ev_kqueue.c" 2078# include "ev_kqueue.c"
… …
754#endif 2085#endif
755#if EV_USE_SELECT 2086#if EV_USE_SELECT
756# include "ev_select.c" 2087# include "ev_select.c"
757#endif 2088#endif
758 2089
759int 2090int ecb_cold
760ev_version_major (void) 2091ev_version_major (void)
761{ 2092{
762 return EV_VERSION_MAJOR; 2093 return EV_VERSION_MAJOR;
763} 2094}
764 2095
765int 2096int ecb_cold
766ev_version_minor (void) 2097ev_version_minor (void)
767{ 2098{
768 return EV_VERSION_MINOR; 2099 return EV_VERSION_MINOR;
769} 2100}
770 2101
771/* return true if we are running with elevated privileges and should ignore env variables */ 2102/* return true if we are running with elevated privileges and should ignore env variables */
772static int 2103int inline_size ecb_cold
773enable_secure (void) 2104enable_secure (void)
774{ 2105{
775#ifdef _WIN32 2106#ifdef _WIN32
776 return 0; 2107 return 0;
777#else 2108#else
778 return getuid () != geteuid () 2109 return getuid () != geteuid ()
779 || getgid () != getegid (); 2110 || getgid () != getegid ();
780#endif 2111#endif
781} 2112}
782 2113
783unsigned int 2114unsigned int ecb_cold
784ev_supported_backends (void) 2115ev_supported_backends (void)
785{ 2116{
786}
787
788unsigned int
789ev_recommended_backends (void)
790{
791 unsigned int flags; 2117 unsigned int flags = 0;
792 2118
793 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2119 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
794 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2120 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
795 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2121 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
796 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2122 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
797 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2123 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
798 2124
799 return flags; 2125 return flags;
800} 2126}
801 2127
802unsigned int 2128unsigned int ecb_cold
803ev_backend (EV_P) 2129ev_recommended_backends (void)
804{ 2130{
805 unsigned int flags = ev_recommended_backends (); 2131 unsigned int flags = ev_supported_backends ();
806 2132
807#ifndef __NetBSD__ 2133#ifndef __NetBSD__
808 /* kqueue is borked on everything but netbsd apparently */ 2134 /* kqueue is borked on everything but netbsd apparently */
809 /* it usually doesn't work correctly on anything but sockets and pipes */ 2135 /* it usually doesn't work correctly on anything but sockets and pipes */
810 flags &= ~EVBACKEND_KQUEUE; 2136 flags &= ~EVBACKEND_KQUEUE;
811#endif 2137#endif
812#ifdef __APPLE__ 2138#ifdef __APPLE__
813 // flags &= ~EVBACKEND_KQUEUE; for documentation 2139 /* only select works correctly on that "unix-certified" platform */
814 flags &= ~EVBACKEND_POLL; 2140 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2141 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2142#endif
2143#ifdef __FreeBSD__
2144 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
815#endif 2145#endif
816 2146
817 return flags; 2147 return flags;
818} 2148}
819 2149
820static void 2150unsigned int ecb_cold
2151ev_embeddable_backends (void)
2152{
2153 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2154
2155 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2156 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2157 flags &= ~EVBACKEND_EPOLL;
2158
2159 return flags;
2160}
2161
2162unsigned int
2163ev_backend (EV_P)
2164{
2165 return backend;
2166}
2167
2168#if EV_FEATURE_API
2169unsigned int
2170ev_iteration (EV_P)
2171{
2172 return loop_count;
2173}
2174
2175unsigned int
2176ev_depth (EV_P)
2177{
2178 return loop_depth;
2179}
2180
2181void
2182ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2183{
2184 io_blocktime = interval;
2185}
2186
2187void
2188ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2189{
2190 timeout_blocktime = interval;
2191}
2192
2193void
2194ev_set_userdata (EV_P_ void *data)
2195{
2196 userdata = data;
2197}
2198
2199void *
2200ev_userdata (EV_P)
2201{
2202 return userdata;
2203}
2204
2205void
2206ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2207{
2208 invoke_cb = invoke_pending_cb;
2209}
2210
2211void
2212ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2213{
2214 release_cb = release;
2215 acquire_cb = acquire;
2216}
2217#endif
2218
2219/* initialise a loop structure, must be zero-initialised */
2220static void noinline ecb_cold
821loop_init (EV_P_ unsigned int flags) 2221loop_init (EV_P_ unsigned int flags)
822{ 2222{
823 if (!method) 2223 if (!backend)
824 { 2224 {
2225 origflags = flags;
2226
2227#if EV_USE_REALTIME
2228 if (!have_realtime)
2229 {
2230 struct timespec ts;
2231
2232 if (!clock_gettime (CLOCK_REALTIME, &ts))
2233 have_realtime = 1;
2234 }
2235#endif
2236
825#if EV_USE_MONOTONIC 2237#if EV_USE_MONOTONIC
2238 if (!have_monotonic)
826 { 2239 {
827 struct timespec ts; 2240 struct timespec ts;
2241
828 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2242 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
829 have_monotonic = 1; 2243 have_monotonic = 1;
830 } 2244 }
831#endif 2245#endif
832 2246
833 ev_rt_now = ev_time (); 2247 /* pid check not overridable via env */
834 mn_now = get_clock (); 2248#ifndef _WIN32
835 now_floor = mn_now; 2249 if (flags & EVFLAG_FORKCHECK)
836 rtmn_diff = ev_rt_now - mn_now; 2250 curpid = getpid ();
2251#endif
837 2252
838 if (!(flags & EVFLAG_NOENV) 2253 if (!(flags & EVFLAG_NOENV)
839 && !enable_secure () 2254 && !enable_secure ()
840 && getenv ("LIBEV_FLAGS")) 2255 && getenv ("LIBEV_FLAGS"))
841 flags = atoi (getenv ("LIBEV_FLAGS")); 2256 flags = atoi (getenv ("LIBEV_FLAGS"));
842 2257
843 if (!(flags & 0x0000ffffUL)) 2258 ev_rt_now = ev_time ();
2259 mn_now = get_clock ();
2260 now_floor = mn_now;
2261 rtmn_diff = ev_rt_now - mn_now;
2262#if EV_FEATURE_API
2263 invoke_cb = ev_invoke_pending;
2264#endif
2265
2266 io_blocktime = 0.;
2267 timeout_blocktime = 0.;
2268 backend = 0;
2269 backend_fd = -1;
2270 sig_pending = 0;
2271#if EV_ASYNC_ENABLE
2272 async_pending = 0;
2273#endif
2274 pipe_write_skipped = 0;
2275 pipe_write_wanted = 0;
2276#if EV_USE_INOTIFY
2277 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2278#endif
2279#if EV_USE_SIGNALFD
2280 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2281#endif
2282
2283 if (!(flags & EVBACKEND_MASK))
844 flags |= ev_recommended_backends (); 2284 flags |= ev_recommended_backends ();
845 2285
846 method = 0; 2286#if EV_USE_IOCP
2287 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2288#endif
847#if EV_USE_PORT 2289#if EV_USE_PORT
848 if (!method && (flags & EVBACKEND_PORT )) method = port_init (EV_A_ flags); 2290 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
849#endif 2291#endif
850#if EV_USE_KQUEUE 2292#if EV_USE_KQUEUE
851 if (!method && (flags & EVBACKEND_KQUEUE)) method = kqueue_init (EV_A_ flags); 2293 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
852#endif 2294#endif
853#if EV_USE_EPOLL 2295#if EV_USE_EPOLL
854 if (!method && (flags & EVBACKEND_EPOLL )) method = epoll_init (EV_A_ flags); 2296 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
855#endif 2297#endif
856#if EV_USE_POLL 2298#if EV_USE_POLL
857 if (!method && (flags & EVBACKEND_POLL )) method = poll_init (EV_A_ flags); 2299 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
858#endif 2300#endif
859#if EV_USE_SELECT 2301#if EV_USE_SELECT
860 if (!method && (flags & EVBACKEND_SELECT)) method = select_init (EV_A_ flags); 2302 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
861#endif 2303#endif
862 2304
2305 ev_prepare_init (&pending_w, pendingcb);
2306
2307#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
863 ev_init (&sigev, sigcb); 2308 ev_init (&pipe_w, pipecb);
864 ev_set_priority (&sigev, EV_MAXPRI); 2309 ev_set_priority (&pipe_w, EV_MAXPRI);
2310#endif
865 } 2311 }
866} 2312}
867 2313
868static void 2314/* free up a loop structure */
2315void ecb_cold
869loop_destroy (EV_P) 2316ev_loop_destroy (EV_P)
870{ 2317{
871 int i; 2318 int i;
872 2319
2320#if EV_MULTIPLICITY
2321 /* mimic free (0) */
2322 if (!EV_A)
2323 return;
2324#endif
2325
2326#if EV_CLEANUP_ENABLE
2327 /* queue cleanup watchers (and execute them) */
2328 if (expect_false (cleanupcnt))
2329 {
2330 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2331 EV_INVOKE_PENDING;
2332 }
2333#endif
2334
2335#if EV_CHILD_ENABLE
2336 if (ev_is_active (&childev))
2337 {
2338 ev_ref (EV_A); /* child watcher */
2339 ev_signal_stop (EV_A_ &childev);
2340 }
2341#endif
2342
2343 if (ev_is_active (&pipe_w))
2344 {
2345 /*ev_ref (EV_A);*/
2346 /*ev_io_stop (EV_A_ &pipe_w);*/
2347
2348#if EV_USE_EVENTFD
2349 if (evfd >= 0)
2350 close (evfd);
2351#endif
2352
2353 if (evpipe [0] >= 0)
2354 {
2355 EV_WIN32_CLOSE_FD (evpipe [0]);
2356 EV_WIN32_CLOSE_FD (evpipe [1]);
2357 }
2358 }
2359
2360#if EV_USE_SIGNALFD
2361 if (ev_is_active (&sigfd_w))
2362 close (sigfd);
2363#endif
2364
2365#if EV_USE_INOTIFY
2366 if (fs_fd >= 0)
2367 close (fs_fd);
2368#endif
2369
2370 if (backend_fd >= 0)
2371 close (backend_fd);
2372
2373#if EV_USE_IOCP
2374 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2375#endif
873#if EV_USE_PORT 2376#if EV_USE_PORT
874 if (method == EVBACKEND_PORT ) port_destroy (EV_A); 2377 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
875#endif 2378#endif
876#if EV_USE_KQUEUE 2379#if EV_USE_KQUEUE
877 if (method == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2380 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
878#endif 2381#endif
879#if EV_USE_EPOLL 2382#if EV_USE_EPOLL
880 if (method == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 2383 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
881#endif 2384#endif
882#if EV_USE_POLL 2385#if EV_USE_POLL
883 if (method == EVBACKEND_POLL ) poll_destroy (EV_A); 2386 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
884#endif 2387#endif
885#if EV_USE_SELECT 2388#if EV_USE_SELECT
886 if (method == EVBACKEND_SELECT) select_destroy (EV_A); 2389 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
887#endif 2390#endif
888 2391
889 for (i = NUMPRI; i--; ) 2392 for (i = NUMPRI; i--; )
2393 {
890 array_free (pending, [i]); 2394 array_free (pending, [i]);
2395#if EV_IDLE_ENABLE
2396 array_free (idle, [i]);
2397#endif
2398 }
2399
2400 ev_free (anfds); anfds = 0; anfdmax = 0;
891 2401
892 /* have to use the microsoft-never-gets-it-right macro */ 2402 /* have to use the microsoft-never-gets-it-right macro */
2403 array_free (rfeed, EMPTY);
893 array_free (fdchange, EMPTY0); 2404 array_free (fdchange, EMPTY);
894 array_free (timer, EMPTY0); 2405 array_free (timer, EMPTY);
895#if EV_PERIODICS 2406#if EV_PERIODIC_ENABLE
896 array_free (periodic, EMPTY0); 2407 array_free (periodic, EMPTY);
897#endif 2408#endif
2409#if EV_FORK_ENABLE
2410 array_free (fork, EMPTY);
2411#endif
2412#if EV_CLEANUP_ENABLE
898 array_free (idle, EMPTY0); 2413 array_free (cleanup, EMPTY);
2414#endif
899 array_free (prepare, EMPTY0); 2415 array_free (prepare, EMPTY);
900 array_free (check, EMPTY0); 2416 array_free (check, EMPTY);
2417#if EV_ASYNC_ENABLE
2418 array_free (async, EMPTY);
2419#endif
901 2420
902 method = 0; 2421 backend = 0;
903}
904 2422
905static void 2423#if EV_MULTIPLICITY
2424 if (ev_is_default_loop (EV_A))
2425#endif
2426 ev_default_loop_ptr = 0;
2427#if EV_MULTIPLICITY
2428 else
2429 ev_free (EV_A);
2430#endif
2431}
2432
2433#if EV_USE_INOTIFY
2434inline_size void infy_fork (EV_P);
2435#endif
2436
2437inline_size void
906loop_fork (EV_P) 2438loop_fork (EV_P)
907{ 2439{
908#if EV_USE_PORT 2440#if EV_USE_PORT
909 if (method == EVBACKEND_PORT ) port_fork (EV_A); 2441 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
910#endif 2442#endif
911#if EV_USE_KQUEUE 2443#if EV_USE_KQUEUE
912 if (method == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 2444 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
913#endif 2445#endif
914#if EV_USE_EPOLL 2446#if EV_USE_EPOLL
915 if (method == EVBACKEND_EPOLL ) epoll_fork (EV_A); 2447 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
916#endif 2448#endif
2449#if EV_USE_INOTIFY
2450 infy_fork (EV_A);
2451#endif
917 2452
918 if (ev_is_active (&sigev)) 2453 if (ev_is_active (&pipe_w))
919 { 2454 {
920 /* default loop */ 2455 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
921 2456
922 ev_ref (EV_A); 2457 ev_ref (EV_A);
923 ev_io_stop (EV_A_ &sigev); 2458 ev_io_stop (EV_A_ &pipe_w);
924 close (sigpipe [0]);
925 close (sigpipe [1]);
926 2459
927 while (pipe (sigpipe)) 2460#if EV_USE_EVENTFD
928 syserr ("(libev) error creating pipe"); 2461 if (evfd >= 0)
2462 close (evfd);
2463#endif
929 2464
2465 if (evpipe [0] >= 0)
2466 {
2467 EV_WIN32_CLOSE_FD (evpipe [0]);
2468 EV_WIN32_CLOSE_FD (evpipe [1]);
2469 }
2470
2471#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
930 siginit (EV_A); 2472 evpipe_init (EV_A);
2473 /* now iterate over everything, in case we missed something */
2474 pipecb (EV_A_ &pipe_w, EV_READ);
2475#endif
931 } 2476 }
932 2477
933 postfork = 0; 2478 postfork = 0;
934} 2479}
935 2480
936#if EV_MULTIPLICITY 2481#if EV_MULTIPLICITY
2482
937struct ev_loop * 2483struct ev_loop * ecb_cold
938ev_loop_new (unsigned int flags) 2484ev_loop_new (unsigned int flags)
939{ 2485{
940 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2486 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
941 2487
942 memset (loop, 0, sizeof (struct ev_loop)); 2488 memset (EV_A, 0, sizeof (struct ev_loop));
943
944 loop_init (EV_A_ flags); 2489 loop_init (EV_A_ flags);
945 2490
946 if (ev_method (EV_A)) 2491 if (ev_backend (EV_A))
947 return loop; 2492 return EV_A;
948 2493
2494 ev_free (EV_A);
949 return 0; 2495 return 0;
950} 2496}
951 2497
952void 2498#endif /* multiplicity */
953ev_loop_destroy (EV_P)
954{
955 loop_destroy (EV_A);
956 ev_free (loop);
957}
958 2499
959void 2500#if EV_VERIFY
960ev_loop_fork (EV_P) 2501static void noinline ecb_cold
2502verify_watcher (EV_P_ W w)
961{ 2503{
962 postfork = 1; 2504 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
963}
964 2505
2506 if (w->pending)
2507 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2508}
2509
2510static void noinline ecb_cold
2511verify_heap (EV_P_ ANHE *heap, int N)
2512{
2513 int i;
2514
2515 for (i = HEAP0; i < N + HEAP0; ++i)
2516 {
2517 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2518 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2519 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2520
2521 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2522 }
2523}
2524
2525static void noinline ecb_cold
2526array_verify (EV_P_ W *ws, int cnt)
2527{
2528 while (cnt--)
2529 {
2530 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2531 verify_watcher (EV_A_ ws [cnt]);
2532 }
2533}
2534#endif
2535
2536#if EV_FEATURE_API
2537void ecb_cold
2538ev_verify (EV_P)
2539{
2540#if EV_VERIFY
2541 int i;
2542 WL w;
2543
2544 assert (activecnt >= -1);
2545
2546 assert (fdchangemax >= fdchangecnt);
2547 for (i = 0; i < fdchangecnt; ++i)
2548 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2549
2550 assert (anfdmax >= 0);
2551 for (i = 0; i < anfdmax; ++i)
2552 for (w = anfds [i].head; w; w = w->next)
2553 {
2554 verify_watcher (EV_A_ (W)w);
2555 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2556 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2557 }
2558
2559 assert (timermax >= timercnt);
2560 verify_heap (EV_A_ timers, timercnt);
2561
2562#if EV_PERIODIC_ENABLE
2563 assert (periodicmax >= periodiccnt);
2564 verify_heap (EV_A_ periodics, periodiccnt);
2565#endif
2566
2567 for (i = NUMPRI; i--; )
2568 {
2569 assert (pendingmax [i] >= pendingcnt [i]);
2570#if EV_IDLE_ENABLE
2571 assert (idleall >= 0);
2572 assert (idlemax [i] >= idlecnt [i]);
2573 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2574#endif
2575 }
2576
2577#if EV_FORK_ENABLE
2578 assert (forkmax >= forkcnt);
2579 array_verify (EV_A_ (W *)forks, forkcnt);
2580#endif
2581
2582#if EV_CLEANUP_ENABLE
2583 assert (cleanupmax >= cleanupcnt);
2584 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2585#endif
2586
2587#if EV_ASYNC_ENABLE
2588 assert (asyncmax >= asynccnt);
2589 array_verify (EV_A_ (W *)asyncs, asynccnt);
2590#endif
2591
2592#if EV_PREPARE_ENABLE
2593 assert (preparemax >= preparecnt);
2594 array_verify (EV_A_ (W *)prepares, preparecnt);
2595#endif
2596
2597#if EV_CHECK_ENABLE
2598 assert (checkmax >= checkcnt);
2599 array_verify (EV_A_ (W *)checks, checkcnt);
2600#endif
2601
2602# if 0
2603#if EV_CHILD_ENABLE
2604 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2605 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2606#endif
2607# endif
2608#endif
2609}
965#endif 2610#endif
966 2611
967#if EV_MULTIPLICITY 2612#if EV_MULTIPLICITY
968struct ev_loop * 2613struct ev_loop * ecb_cold
969ev_default_loop_init (unsigned int flags)
970#else 2614#else
971int 2615int
2616#endif
972ev_default_loop (unsigned int flags) 2617ev_default_loop (unsigned int flags)
973#endif
974{ 2618{
975 if (sigpipe [0] == sigpipe [1])
976 if (pipe (sigpipe))
977 return 0;
978
979 if (!ev_default_loop_ptr) 2619 if (!ev_default_loop_ptr)
980 { 2620 {
981#if EV_MULTIPLICITY 2621#if EV_MULTIPLICITY
982 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2622 EV_P = ev_default_loop_ptr = &default_loop_struct;
983#else 2623#else
984 ev_default_loop_ptr = 1; 2624 ev_default_loop_ptr = 1;
985#endif 2625#endif
986 2626
987 loop_init (EV_A_ flags); 2627 loop_init (EV_A_ flags);
988 2628
989 if (ev_method (EV_A)) 2629 if (ev_backend (EV_A))
990 { 2630 {
991 siginit (EV_A); 2631#if EV_CHILD_ENABLE
992
993#ifndef _WIN32
994 ev_signal_init (&childev, childcb, SIGCHLD); 2632 ev_signal_init (&childev, childcb, SIGCHLD);
995 ev_set_priority (&childev, EV_MAXPRI); 2633 ev_set_priority (&childev, EV_MAXPRI);
996 ev_signal_start (EV_A_ &childev); 2634 ev_signal_start (EV_A_ &childev);
997 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2635 ev_unref (EV_A); /* child watcher should not keep loop alive */
998#endif 2636#endif
… …
1003 2641
1004 return ev_default_loop_ptr; 2642 return ev_default_loop_ptr;
1005} 2643}
1006 2644
1007void 2645void
1008ev_default_destroy (void) 2646ev_loop_fork (EV_P)
1009{ 2647{
1010#if EV_MULTIPLICITY 2648 postfork = 1; /* must be in line with ev_default_fork */
1011 struct ev_loop *loop = ev_default_loop_ptr;
1012#endif
1013
1014#ifndef _WIN32
1015 ev_ref (EV_A); /* child watcher */
1016 ev_signal_stop (EV_A_ &childev);
1017#endif
1018
1019 ev_ref (EV_A); /* signal watcher */
1020 ev_io_stop (EV_A_ &sigev);
1021
1022 close (sigpipe [0]); sigpipe [0] = 0;
1023 close (sigpipe [1]); sigpipe [1] = 0;
1024
1025 loop_destroy (EV_A);
1026} 2649}
2650
2651/*****************************************************************************/
1027 2652
1028void 2653void
1029ev_default_fork (void) 2654ev_invoke (EV_P_ void *w, int revents)
1030{ 2655{
1031#if EV_MULTIPLICITY 2656 EV_CB_INVOKE ((W)w, revents);
1032 struct ev_loop *loop = ev_default_loop_ptr;
1033#endif
1034
1035 if (method)
1036 postfork = 1;
1037} 2657}
1038 2658
1039/*****************************************************************************/ 2659unsigned int
1040 2660ev_pending_count (EV_P)
1041static int
1042any_pending (EV_P)
1043{ 2661{
1044 int pri; 2662 int pri;
2663 unsigned int count = 0;
1045 2664
1046 for (pri = NUMPRI; pri--; ) 2665 for (pri = NUMPRI; pri--; )
1047 if (pendingcnt [pri]) 2666 count += pendingcnt [pri];
1048 return 1;
1049 2667
1050 return 0; 2668 return count;
1051} 2669}
1052 2670
1053inline void 2671void noinline
1054call_pending (EV_P) 2672ev_invoke_pending (EV_P)
1055{ 2673{
1056 int pri; 2674 int pri;
1057 2675
1058 for (pri = NUMPRI; pri--; ) 2676 for (pri = NUMPRI; pri--; )
1059 while (pendingcnt [pri]) 2677 while (pendingcnt [pri])
1060 { 2678 {
1061 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2679 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1062 2680
1063 if (expect_true (p->w))
1064 {
1065 p->w->pending = 0; 2681 p->w->pending = 0;
1066 EV_CB_INVOKE (p->w, p->events); 2682 EV_CB_INVOKE (p->w, p->events);
1067 } 2683 EV_FREQUENT_CHECK;
1068 } 2684 }
1069} 2685}
1070 2686
2687#if EV_IDLE_ENABLE
2688/* make idle watchers pending. this handles the "call-idle */
2689/* only when higher priorities are idle" logic */
1071inline void 2690inline_size void
2691idle_reify (EV_P)
2692{
2693 if (expect_false (idleall))
2694 {
2695 int pri;
2696
2697 for (pri = NUMPRI; pri--; )
2698 {
2699 if (pendingcnt [pri])
2700 break;
2701
2702 if (idlecnt [pri])
2703 {
2704 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2705 break;
2706 }
2707 }
2708 }
2709}
2710#endif
2711
2712/* make timers pending */
2713inline_size void
1072timers_reify (EV_P) 2714timers_reify (EV_P)
1073{ 2715{
2716 EV_FREQUENT_CHECK;
2717
1074 while (timercnt && ((WT)timers [0])->at <= mn_now) 2718 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1075 { 2719 {
1076 struct ev_timer *w = timers [0]; 2720 do
1077
1078 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1079
1080 /* first reschedule or stop timer */
1081 if (w->repeat)
1082 { 2721 {
2722 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2723
2724 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2725
2726 /* first reschedule or stop timer */
2727 if (w->repeat)
2728 {
2729 ev_at (w) += w->repeat;
2730 if (ev_at (w) < mn_now)
2731 ev_at (w) = mn_now;
2732
1083 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2733 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1084 2734
1085 ((WT)w)->at += w->repeat; 2735 ANHE_at_cache (timers [HEAP0]);
1086 if (((WT)w)->at < mn_now)
1087 ((WT)w)->at = mn_now;
1088
1089 downheap ((WT *)timers, timercnt, 0); 2736 downheap (timers, timercnt, HEAP0);
2737 }
2738 else
2739 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2740
2741 EV_FREQUENT_CHECK;
2742 feed_reverse (EV_A_ (W)w);
1090 } 2743 }
1091 else 2744 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1092 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1093 2745
1094 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2746 feed_reverse_done (EV_A_ EV_TIMER);
2747 }
2748}
2749
2750#if EV_PERIODIC_ENABLE
2751
2752static void noinline
2753periodic_recalc (EV_P_ ev_periodic *w)
2754{
2755 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2756 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2757
2758 /* the above almost always errs on the low side */
2759 while (at <= ev_rt_now)
1095 } 2760 {
1096} 2761 ev_tstamp nat = at + w->interval;
1097 2762
1098#if EV_PERIODICS 2763 /* when resolution fails us, we use ev_rt_now */
2764 if (expect_false (nat == at))
2765 {
2766 at = ev_rt_now;
2767 break;
2768 }
2769
2770 at = nat;
2771 }
2772
2773 ev_at (w) = at;
2774}
2775
2776/* make periodics pending */
1099inline void 2777inline_size void
1100periodics_reify (EV_P) 2778periodics_reify (EV_P)
1101{ 2779{
2780 EV_FREQUENT_CHECK;
2781
1102 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2782 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1103 { 2783 {
1104 struct ev_periodic *w = periodics [0]; 2784 int feed_count = 0;
1105 2785
2786 do
2787 {
2788 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2789
1106 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2790 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1107 2791
1108 /* first reschedule or stop timer */ 2792 /* first reschedule or stop timer */
2793 if (w->reschedule_cb)
2794 {
2795 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2796
2797 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2798
2799 ANHE_at_cache (periodics [HEAP0]);
2800 downheap (periodics, periodiccnt, HEAP0);
2801 }
2802 else if (w->interval)
2803 {
2804 periodic_recalc (EV_A_ w);
2805 ANHE_at_cache (periodics [HEAP0]);
2806 downheap (periodics, periodiccnt, HEAP0);
2807 }
2808 else
2809 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2810
2811 EV_FREQUENT_CHECK;
2812 feed_reverse (EV_A_ (W)w);
2813 }
2814 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2815
2816 feed_reverse_done (EV_A_ EV_PERIODIC);
2817 }
2818}
2819
2820/* simply recalculate all periodics */
2821/* TODO: maybe ensure that at least one event happens when jumping forward? */
2822static void noinline ecb_cold
2823periodics_reschedule (EV_P)
2824{
2825 int i;
2826
2827 /* adjust periodics after time jump */
2828 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2829 {
2830 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2831
1109 if (w->reschedule_cb) 2832 if (w->reschedule_cb)
2833 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2834 else if (w->interval)
2835 periodic_recalc (EV_A_ w);
2836
2837 ANHE_at_cache (periodics [i]);
2838 }
2839
2840 reheap (periodics, periodiccnt);
2841}
2842#endif
2843
2844/* adjust all timers by a given offset */
2845static void noinline ecb_cold
2846timers_reschedule (EV_P_ ev_tstamp adjust)
2847{
2848 int i;
2849
2850 for (i = 0; i < timercnt; ++i)
2851 {
2852 ANHE *he = timers + i + HEAP0;
2853 ANHE_w (*he)->at += adjust;
2854 ANHE_at_cache (*he);
2855 }
2856}
2857
2858/* fetch new monotonic and realtime times from the kernel */
2859/* also detect if there was a timejump, and act accordingly */
2860inline_speed void
2861time_update (EV_P_ ev_tstamp max_block)
2862{
2863#if EV_USE_MONOTONIC
2864 if (expect_true (have_monotonic))
2865 {
2866 int i;
2867 ev_tstamp odiff = rtmn_diff;
2868
2869 mn_now = get_clock ();
2870
2871 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2872 /* interpolate in the meantime */
2873 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1110 { 2874 {
1111 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2875 ev_rt_now = rtmn_diff + mn_now;
1112 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2876 return;
1113 downheap ((WT *)periodics, periodiccnt, 0);
1114 } 2877 }
1115 else if (w->interval)
1116 {
1117 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1118 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1119 downheap ((WT *)periodics, periodiccnt, 0);
1120 }
1121 else
1122 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1123 2878
1124 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1125 }
1126}
1127
1128static void
1129periodics_reschedule (EV_P)
1130{
1131 int i;
1132
1133 /* adjust periodics after time jump */
1134 for (i = 0; i < periodiccnt; ++i)
1135 {
1136 struct ev_periodic *w = periodics [i];
1137
1138 if (w->reschedule_cb)
1139 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1140 else if (w->interval)
1141 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1142 }
1143
1144 /* now rebuild the heap */
1145 for (i = periodiccnt >> 1; i--; )
1146 downheap ((WT *)periodics, periodiccnt, i);
1147}
1148#endif
1149
1150inline int
1151time_update_monotonic (EV_P)
1152{
1153 mn_now = get_clock ();
1154
1155 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1156 {
1157 ev_rt_now = rtmn_diff + mn_now;
1158 return 0;
1159 }
1160 else
1161 {
1162 now_floor = mn_now; 2879 now_floor = mn_now;
1163 ev_rt_now = ev_time (); 2880 ev_rt_now = ev_time ();
1164 return 1;
1165 }
1166}
1167 2881
1168inline void 2882 /* loop a few times, before making important decisions.
1169time_update (EV_P) 2883 * on the choice of "4": one iteration isn't enough,
1170{ 2884 * in case we get preempted during the calls to
1171 int i; 2885 * ev_time and get_clock. a second call is almost guaranteed
1172 2886 * to succeed in that case, though. and looping a few more times
1173#if EV_USE_MONOTONIC 2887 * doesn't hurt either as we only do this on time-jumps or
1174 if (expect_true (have_monotonic)) 2888 * in the unlikely event of having been preempted here.
1175 { 2889 */
1176 if (time_update_monotonic (EV_A)) 2890 for (i = 4; --i; )
1177 { 2891 {
1178 ev_tstamp odiff = rtmn_diff; 2892 ev_tstamp diff;
1179
1180 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1181 {
1182 rtmn_diff = ev_rt_now - mn_now; 2893 rtmn_diff = ev_rt_now - mn_now;
1183 2894
1184 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2895 diff = odiff - rtmn_diff;
2896
2897 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1185 return; /* all is well */ 2898 return; /* all is well */
1186 2899
1187 ev_rt_now = ev_time (); 2900 ev_rt_now = ev_time ();
1188 mn_now = get_clock (); 2901 mn_now = get_clock ();
1189 now_floor = mn_now; 2902 now_floor = mn_now;
1190 } 2903 }
1191 2904
2905 /* no timer adjustment, as the monotonic clock doesn't jump */
2906 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1192# if EV_PERIODICS 2907# if EV_PERIODIC_ENABLE
2908 periodics_reschedule (EV_A);
2909# endif
2910 }
2911 else
2912#endif
2913 {
2914 ev_rt_now = ev_time ();
2915
2916 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2917 {
2918 /* adjust timers. this is easy, as the offset is the same for all of them */
2919 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2920#if EV_PERIODIC_ENABLE
1193 periodics_reschedule (EV_A); 2921 periodics_reschedule (EV_A);
1194# endif 2922#endif
1195 /* no timer adjustment, as the monotonic clock doesn't jump */
1196 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1197 } 2923 }
1198 }
1199 else
1200#endif
1201 {
1202 ev_rt_now = ev_time ();
1203
1204 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1205 {
1206#if EV_PERIODICS
1207 periodics_reschedule (EV_A);
1208#endif
1209
1210 /* adjust timers. this is easy, as the offset is the same for all */
1211 for (i = 0; i < timercnt; ++i)
1212 ((WT)timers [i])->at += ev_rt_now - mn_now;
1213 }
1214 2924
1215 mn_now = ev_rt_now; 2925 mn_now = ev_rt_now;
1216 } 2926 }
1217} 2927}
1218 2928
1219void 2929void
1220ev_ref (EV_P)
1221{
1222 ++activecnt;
1223}
1224
1225void
1226ev_unref (EV_P)
1227{
1228 --activecnt;
1229}
1230
1231static int loop_done;
1232
1233void
1234ev_loop (EV_P_ int flags) 2930ev_run (EV_P_ int flags)
1235{ 2931{
1236 double block; 2932#if EV_FEATURE_API
1237 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2933 ++loop_depth;
2934#endif
1238 2935
1239 while (activecnt) 2936 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2937
2938 loop_done = EVBREAK_CANCEL;
2939
2940 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2941
2942 do
1240 { 2943 {
2944#if EV_VERIFY >= 2
2945 ev_verify (EV_A);
2946#endif
2947
2948#ifndef _WIN32
2949 if (expect_false (curpid)) /* penalise the forking check even more */
2950 if (expect_false (getpid () != curpid))
2951 {
2952 curpid = getpid ();
2953 postfork = 1;
2954 }
2955#endif
2956
2957#if EV_FORK_ENABLE
2958 /* we might have forked, so queue fork handlers */
2959 if (expect_false (postfork))
2960 if (forkcnt)
2961 {
2962 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2963 EV_INVOKE_PENDING;
2964 }
2965#endif
2966
2967#if EV_PREPARE_ENABLE
1241 /* queue check watchers (and execute them) */ 2968 /* queue prepare watchers (and execute them) */
1242 if (expect_false (preparecnt)) 2969 if (expect_false (preparecnt))
1243 { 2970 {
1244 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2971 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1245 call_pending (EV_A); 2972 EV_INVOKE_PENDING;
1246 } 2973 }
2974#endif
2975
2976 if (expect_false (loop_done))
2977 break;
1247 2978
1248 /* we might have forked, so reify kernel state if necessary */ 2979 /* we might have forked, so reify kernel state if necessary */
1249 if (expect_false (postfork)) 2980 if (expect_false (postfork))
1250 loop_fork (EV_A); 2981 loop_fork (EV_A);
1251 2982
1252 /* update fd-related kernel structures */ 2983 /* update fd-related kernel structures */
1253 fd_reify (EV_A); 2984 fd_reify (EV_A);
1254 2985
1255 /* calculate blocking time */ 2986 /* calculate blocking time */
2987 {
2988 ev_tstamp waittime = 0.;
2989 ev_tstamp sleeptime = 0.;
1256 2990
1257 /* we only need this for !monotonic clock or timers, but as we basically 2991 /* remember old timestamp for io_blocktime calculation */
1258 always have timers, we just calculate it always */ 2992 ev_tstamp prev_mn_now = mn_now;
1259#if EV_USE_MONOTONIC 2993
1260 if (expect_true (have_monotonic)) 2994 /* update time to cancel out callback processing overhead */
1261 time_update_monotonic (EV_A); 2995 time_update (EV_A_ 1e100);
1262 else 2996
1263#endif 2997 /* from now on, we want a pipe-wake-up */
2998 pipe_write_wanted = 1;
2999
3000 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3001
3002 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1264 { 3003 {
1265 ev_rt_now = ev_time ();
1266 mn_now = ev_rt_now;
1267 }
1268
1269 if (flags & EVLOOP_NONBLOCK || idlecnt)
1270 block = 0.;
1271 else
1272 {
1273 block = MAX_BLOCKTIME; 3004 waittime = MAX_BLOCKTIME;
1274 3005
1275 if (timercnt) 3006 if (timercnt)
1276 { 3007 {
1277 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 3008 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1278 if (block > to) block = to; 3009 if (waittime > to) waittime = to;
1279 } 3010 }
1280 3011
1281#if EV_PERIODICS 3012#if EV_PERIODIC_ENABLE
1282 if (periodiccnt) 3013 if (periodiccnt)
1283 { 3014 {
1284 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 3015 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1285 if (block > to) block = to; 3016 if (waittime > to) waittime = to;
1286 } 3017 }
1287#endif 3018#endif
1288 3019
1289 if (expect_false (block < 0.)) block = 0.; 3020 /* don't let timeouts decrease the waittime below timeout_blocktime */
3021 if (expect_false (waittime < timeout_blocktime))
3022 waittime = timeout_blocktime;
3023
3024 /* at this point, we NEED to wait, so we have to ensure */
3025 /* to pass a minimum nonzero value to the backend */
3026 if (expect_false (waittime < backend_mintime))
3027 waittime = backend_mintime;
3028
3029 /* extra check because io_blocktime is commonly 0 */
3030 if (expect_false (io_blocktime))
3031 {
3032 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3033
3034 if (sleeptime > waittime - backend_mintime)
3035 sleeptime = waittime - backend_mintime;
3036
3037 if (expect_true (sleeptime > 0.))
3038 {
3039 ev_sleep (sleeptime);
3040 waittime -= sleeptime;
3041 }
3042 }
1290 } 3043 }
1291 3044
1292 method_poll (EV_A_ block); 3045#if EV_FEATURE_API
3046 ++loop_count;
3047#endif
3048 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3049 backend_poll (EV_A_ waittime);
3050 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1293 3051
3052 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3053
3054 if (pipe_write_skipped)
3055 {
3056 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3057 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3058 }
3059
3060
1294 /* update ev_rt_now, do magic */ 3061 /* update ev_rt_now, do magic */
1295 time_update (EV_A); 3062 time_update (EV_A_ waittime + sleeptime);
3063 }
1296 3064
1297 /* queue pending timers and reschedule them */ 3065 /* queue pending timers and reschedule them */
1298 timers_reify (EV_A); /* relative timers called last */ 3066 timers_reify (EV_A); /* relative timers called last */
1299#if EV_PERIODICS 3067#if EV_PERIODIC_ENABLE
1300 periodics_reify (EV_A); /* absolute timers called first */ 3068 periodics_reify (EV_A); /* absolute timers called first */
1301#endif 3069#endif
1302 3070
3071#if EV_IDLE_ENABLE
1303 /* queue idle watchers unless io or timers are pending */ 3072 /* queue idle watchers unless other events are pending */
1304 if (idlecnt && !any_pending (EV_A)) 3073 idle_reify (EV_A);
1305 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3074#endif
1306 3075
3076#if EV_CHECK_ENABLE
1307 /* queue check watchers, to be executed first */ 3077 /* queue check watchers, to be executed first */
1308 if (expect_false (checkcnt)) 3078 if (expect_false (checkcnt))
1309 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3079 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3080#endif
1310 3081
1311 call_pending (EV_A); 3082 EV_INVOKE_PENDING;
1312
1313 if (expect_false (loop_done))
1314 break;
1315 } 3083 }
3084 while (expect_true (
3085 activecnt
3086 && !loop_done
3087 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3088 ));
1316 3089
1317 if (loop_done != 2) 3090 if (loop_done == EVBREAK_ONE)
1318 loop_done = 0; 3091 loop_done = EVBREAK_CANCEL;
3092
3093#if EV_FEATURE_API
3094 --loop_depth;
3095#endif
1319} 3096}
1320 3097
1321void 3098void
1322ev_unloop (EV_P_ int how) 3099ev_break (EV_P_ int how)
1323{ 3100{
1324 loop_done = how; 3101 loop_done = how;
1325} 3102}
1326 3103
3104void
3105ev_ref (EV_P)
3106{
3107 ++activecnt;
3108}
3109
3110void
3111ev_unref (EV_P)
3112{
3113 --activecnt;
3114}
3115
3116void
3117ev_now_update (EV_P)
3118{
3119 time_update (EV_A_ 1e100);
3120}
3121
3122void
3123ev_suspend (EV_P)
3124{
3125 ev_now_update (EV_A);
3126}
3127
3128void
3129ev_resume (EV_P)
3130{
3131 ev_tstamp mn_prev = mn_now;
3132
3133 ev_now_update (EV_A);
3134 timers_reschedule (EV_A_ mn_now - mn_prev);
3135#if EV_PERIODIC_ENABLE
3136 /* TODO: really do this? */
3137 periodics_reschedule (EV_A);
3138#endif
3139}
3140
1327/*****************************************************************************/ 3141/*****************************************************************************/
3142/* singly-linked list management, used when the expected list length is short */
1328 3143
1329inline void 3144inline_size void
1330wlist_add (WL *head, WL elem) 3145wlist_add (WL *head, WL elem)
1331{ 3146{
1332 elem->next = *head; 3147 elem->next = *head;
1333 *head = elem; 3148 *head = elem;
1334} 3149}
1335 3150
1336inline void 3151inline_size void
1337wlist_del (WL *head, WL elem) 3152wlist_del (WL *head, WL elem)
1338{ 3153{
1339 while (*head) 3154 while (*head)
1340 { 3155 {
1341 if (*head == elem) 3156 if (expect_true (*head == elem))
1342 { 3157 {
1343 *head = elem->next; 3158 *head = elem->next;
1344 return; 3159 break;
1345 } 3160 }
1346 3161
1347 head = &(*head)->next; 3162 head = &(*head)->next;
1348 } 3163 }
1349} 3164}
1350 3165
3166/* internal, faster, version of ev_clear_pending */
1351inline void 3167inline_speed void
1352ev_clear_pending (EV_P_ W w) 3168clear_pending (EV_P_ W w)
1353{ 3169{
1354 if (w->pending) 3170 if (w->pending)
1355 { 3171 {
1356 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3172 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1357 w->pending = 0; 3173 w->pending = 0;
1358 } 3174 }
1359} 3175}
1360 3176
3177int
3178ev_clear_pending (EV_P_ void *w)
3179{
3180 W w_ = (W)w;
3181 int pending = w_->pending;
3182
3183 if (expect_true (pending))
3184 {
3185 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3186 p->w = (W)&pending_w;
3187 w_->pending = 0;
3188 return p->events;
3189 }
3190 else
3191 return 0;
3192}
3193
1361inline void 3194inline_size void
3195pri_adjust (EV_P_ W w)
3196{
3197 int pri = ev_priority (w);
3198 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3199 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3200 ev_set_priority (w, pri);
3201}
3202
3203inline_speed void
1362ev_start (EV_P_ W w, int active) 3204ev_start (EV_P_ W w, int active)
1363{ 3205{
1364 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3206 pri_adjust (EV_A_ w);
1365 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1366
1367 w->active = active; 3207 w->active = active;
1368 ev_ref (EV_A); 3208 ev_ref (EV_A);
1369} 3209}
1370 3210
1371inline void 3211inline_size void
1372ev_stop (EV_P_ W w) 3212ev_stop (EV_P_ W w)
1373{ 3213{
1374 ev_unref (EV_A); 3214 ev_unref (EV_A);
1375 w->active = 0; 3215 w->active = 0;
1376} 3216}
1377 3217
1378/*****************************************************************************/ 3218/*****************************************************************************/
1379 3219
1380void 3220void noinline
1381ev_io_start (EV_P_ struct ev_io *w) 3221ev_io_start (EV_P_ ev_io *w)
1382{ 3222{
1383 int fd = w->fd; 3223 int fd = w->fd;
1384 3224
1385 if (expect_false (ev_is_active (w))) 3225 if (expect_false (ev_is_active (w)))
1386 return; 3226 return;
1387 3227
1388 assert (("ev_io_start called with negative fd", fd >= 0)); 3228 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3229 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3230
3231 EV_FREQUENT_CHECK;
1389 3232
1390 ev_start (EV_A_ (W)w, 1); 3233 ev_start (EV_A_ (W)w, 1);
1391 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3234 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1392 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3235 wlist_add (&anfds[fd].head, (WL)w);
1393 3236
1394 fd_change (EV_A_ fd); 3237 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1395} 3238 w->events &= ~EV__IOFDSET;
1396 3239
1397void 3240 EV_FREQUENT_CHECK;
3241}
3242
3243void noinline
1398ev_io_stop (EV_P_ struct ev_io *w) 3244ev_io_stop (EV_P_ ev_io *w)
1399{ 3245{
1400 ev_clear_pending (EV_A_ (W)w); 3246 clear_pending (EV_A_ (W)w);
1401 if (expect_false (!ev_is_active (w))) 3247 if (expect_false (!ev_is_active (w)))
1402 return; 3248 return;
1403 3249
1404 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3250 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1405 3251
3252 EV_FREQUENT_CHECK;
3253
1406 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3254 wlist_del (&anfds[w->fd].head, (WL)w);
1407 ev_stop (EV_A_ (W)w); 3255 ev_stop (EV_A_ (W)w);
1408 3256
1409 fd_change (EV_A_ w->fd); 3257 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1410}
1411 3258
1412void 3259 EV_FREQUENT_CHECK;
3260}
3261
3262void noinline
1413ev_timer_start (EV_P_ struct ev_timer *w) 3263ev_timer_start (EV_P_ ev_timer *w)
1414{ 3264{
1415 if (expect_false (ev_is_active (w))) 3265 if (expect_false (ev_is_active (w)))
1416 return; 3266 return;
1417 3267
1418 ((WT)w)->at += mn_now; 3268 ev_at (w) += mn_now;
1419 3269
1420 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3270 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1421 3271
3272 EV_FREQUENT_CHECK;
3273
3274 ++timercnt;
1422 ev_start (EV_A_ (W)w, ++timercnt); 3275 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1423 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 3276 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1424 timers [timercnt - 1] = w; 3277 ANHE_w (timers [ev_active (w)]) = (WT)w;
1425 upheap ((WT *)timers, timercnt - 1); 3278 ANHE_at_cache (timers [ev_active (w)]);
3279 upheap (timers, ev_active (w));
1426 3280
3281 EV_FREQUENT_CHECK;
3282
1427 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3283 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1428} 3284}
1429 3285
1430void 3286void noinline
1431ev_timer_stop (EV_P_ struct ev_timer *w) 3287ev_timer_stop (EV_P_ ev_timer *w)
1432{ 3288{
1433 ev_clear_pending (EV_A_ (W)w); 3289 clear_pending (EV_A_ (W)w);
1434 if (expect_false (!ev_is_active (w))) 3290 if (expect_false (!ev_is_active (w)))
1435 return; 3291 return;
1436 3292
3293 EV_FREQUENT_CHECK;
3294
3295 {
3296 int active = ev_active (w);
3297
1437 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3298 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1438 3299
3300 --timercnt;
3301
1439 if (expect_true (((W)w)->active < timercnt--)) 3302 if (expect_true (active < timercnt + HEAP0))
1440 { 3303 {
1441 timers [((W)w)->active - 1] = timers [timercnt]; 3304 timers [active] = timers [timercnt + HEAP0];
1442 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3305 adjustheap (timers, timercnt, active);
1443 } 3306 }
3307 }
1444 3308
1445 ((WT)w)->at -= mn_now; 3309 ev_at (w) -= mn_now;
1446 3310
1447 ev_stop (EV_A_ (W)w); 3311 ev_stop (EV_A_ (W)w);
1448}
1449 3312
1450void 3313 EV_FREQUENT_CHECK;
3314}
3315
3316void noinline
1451ev_timer_again (EV_P_ struct ev_timer *w) 3317ev_timer_again (EV_P_ ev_timer *w)
1452{ 3318{
3319 EV_FREQUENT_CHECK;
3320
3321 clear_pending (EV_A_ (W)w);
3322
1453 if (ev_is_active (w)) 3323 if (ev_is_active (w))
1454 { 3324 {
1455 if (w->repeat) 3325 if (w->repeat)
1456 { 3326 {
1457 ((WT)w)->at = mn_now + w->repeat; 3327 ev_at (w) = mn_now + w->repeat;
3328 ANHE_at_cache (timers [ev_active (w)]);
1458 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3329 adjustheap (timers, timercnt, ev_active (w));
1459 } 3330 }
1460 else 3331 else
1461 ev_timer_stop (EV_A_ w); 3332 ev_timer_stop (EV_A_ w);
1462 } 3333 }
1463 else if (w->repeat) 3334 else if (w->repeat)
1464 { 3335 {
1465 w->at = w->repeat; 3336 ev_at (w) = w->repeat;
1466 ev_timer_start (EV_A_ w); 3337 ev_timer_start (EV_A_ w);
1467 } 3338 }
1468}
1469 3339
3340 EV_FREQUENT_CHECK;
3341}
3342
3343ev_tstamp
3344ev_timer_remaining (EV_P_ ev_timer *w)
3345{
3346 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3347}
3348
1470#if EV_PERIODICS 3349#if EV_PERIODIC_ENABLE
1471void 3350void noinline
1472ev_periodic_start (EV_P_ struct ev_periodic *w) 3351ev_periodic_start (EV_P_ ev_periodic *w)
1473{ 3352{
1474 if (expect_false (ev_is_active (w))) 3353 if (expect_false (ev_is_active (w)))
1475 return; 3354 return;
1476 3355
1477 if (w->reschedule_cb) 3356 if (w->reschedule_cb)
1478 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3357 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1479 else if (w->interval) 3358 else if (w->interval)
1480 { 3359 {
1481 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3360 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1482 /* this formula differs from the one in periodic_reify because we do not always round up */ 3361 periodic_recalc (EV_A_ w);
1483 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1484 } 3362 }
3363 else
3364 ev_at (w) = w->offset;
1485 3365
3366 EV_FREQUENT_CHECK;
3367
3368 ++periodiccnt;
1486 ev_start (EV_A_ (W)w, ++periodiccnt); 3369 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1487 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3370 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1488 periodics [periodiccnt - 1] = w; 3371 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1489 upheap ((WT *)periodics, periodiccnt - 1); 3372 ANHE_at_cache (periodics [ev_active (w)]);
3373 upheap (periodics, ev_active (w));
1490 3374
3375 EV_FREQUENT_CHECK;
3376
1491 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3377 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1492} 3378}
1493 3379
1494void 3380void noinline
1495ev_periodic_stop (EV_P_ struct ev_periodic *w) 3381ev_periodic_stop (EV_P_ ev_periodic *w)
1496{ 3382{
1497 ev_clear_pending (EV_A_ (W)w); 3383 clear_pending (EV_A_ (W)w);
1498 if (expect_false (!ev_is_active (w))) 3384 if (expect_false (!ev_is_active (w)))
1499 return; 3385 return;
1500 3386
3387 EV_FREQUENT_CHECK;
3388
3389 {
3390 int active = ev_active (w);
3391
1501 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3392 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1502 3393
3394 --periodiccnt;
3395
1503 if (expect_true (((W)w)->active < periodiccnt--)) 3396 if (expect_true (active < periodiccnt + HEAP0))
1504 { 3397 {
1505 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 3398 periodics [active] = periodics [periodiccnt + HEAP0];
1506 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 3399 adjustheap (periodics, periodiccnt, active);
1507 } 3400 }
3401 }
1508 3402
1509 ev_stop (EV_A_ (W)w); 3403 ev_stop (EV_A_ (W)w);
1510}
1511 3404
1512void 3405 EV_FREQUENT_CHECK;
3406}
3407
3408void noinline
1513ev_periodic_again (EV_P_ struct ev_periodic *w) 3409ev_periodic_again (EV_P_ ev_periodic *w)
1514{ 3410{
1515 /* TODO: use adjustheap and recalculation */ 3411 /* TODO: use adjustheap and recalculation */
1516 ev_periodic_stop (EV_A_ w); 3412 ev_periodic_stop (EV_A_ w);
1517 ev_periodic_start (EV_A_ w); 3413 ev_periodic_start (EV_A_ w);
1518} 3414}
1519#endif 3415#endif
1520 3416
1521void 3417#ifndef SA_RESTART
1522ev_idle_start (EV_P_ struct ev_idle *w) 3418# define SA_RESTART 0
3419#endif
3420
3421#if EV_SIGNAL_ENABLE
3422
3423void noinline
3424ev_signal_start (EV_P_ ev_signal *w)
1523{ 3425{
1524 if (expect_false (ev_is_active (w))) 3426 if (expect_false (ev_is_active (w)))
1525 return; 3427 return;
1526 3428
3429 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3430
3431#if EV_MULTIPLICITY
3432 assert (("libev: a signal must not be attached to two different loops",
3433 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3434
3435 signals [w->signum - 1].loop = EV_A;
3436#endif
3437
3438 EV_FREQUENT_CHECK;
3439
3440#if EV_USE_SIGNALFD
3441 if (sigfd == -2)
3442 {
3443 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3444 if (sigfd < 0 && errno == EINVAL)
3445 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3446
3447 if (sigfd >= 0)
3448 {
3449 fd_intern (sigfd); /* doing it twice will not hurt */
3450
3451 sigemptyset (&sigfd_set);
3452
3453 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3454 ev_set_priority (&sigfd_w, EV_MAXPRI);
3455 ev_io_start (EV_A_ &sigfd_w);
3456 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3457 }
3458 }
3459
3460 if (sigfd >= 0)
3461 {
3462 /* TODO: check .head */
3463 sigaddset (&sigfd_set, w->signum);
3464 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3465
3466 signalfd (sigfd, &sigfd_set, 0);
3467 }
3468#endif
3469
1527 ev_start (EV_A_ (W)w, ++idlecnt); 3470 ev_start (EV_A_ (W)w, 1);
1528 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2); 3471 wlist_add (&signals [w->signum - 1].head, (WL)w);
1529 idles [idlecnt - 1] = w;
1530}
1531 3472
1532void 3473 if (!((WL)w)->next)
1533ev_idle_stop (EV_P_ struct ev_idle *w) 3474# if EV_USE_SIGNALFD
3475 if (sigfd < 0) /*TODO*/
3476# endif
3477 {
3478# ifdef _WIN32
3479 evpipe_init (EV_A);
3480
3481 signal (w->signum, ev_sighandler);
3482# else
3483 struct sigaction sa;
3484
3485 evpipe_init (EV_A);
3486
3487 sa.sa_handler = ev_sighandler;
3488 sigfillset (&sa.sa_mask);
3489 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3490 sigaction (w->signum, &sa, 0);
3491
3492 if (origflags & EVFLAG_NOSIGMASK)
3493 {
3494 sigemptyset (&sa.sa_mask);
3495 sigaddset (&sa.sa_mask, w->signum);
3496 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3497 }
3498#endif
3499 }
3500
3501 EV_FREQUENT_CHECK;
3502}
3503
3504void noinline
3505ev_signal_stop (EV_P_ ev_signal *w)
1534{ 3506{
1535 ev_clear_pending (EV_A_ (W)w); 3507 clear_pending (EV_A_ (W)w);
1536 if (expect_false (!ev_is_active (w))) 3508 if (expect_false (!ev_is_active (w)))
1537 return; 3509 return;
1538 3510
1539 idles [((W)w)->active - 1] = idles [--idlecnt]; 3511 EV_FREQUENT_CHECK;
3512
3513 wlist_del (&signals [w->signum - 1].head, (WL)w);
1540 ev_stop (EV_A_ (W)w); 3514 ev_stop (EV_A_ (W)w);
3515
3516 if (!signals [w->signum - 1].head)
3517 {
3518#if EV_MULTIPLICITY
3519 signals [w->signum - 1].loop = 0; /* unattach from signal */
3520#endif
3521#if EV_USE_SIGNALFD
3522 if (sigfd >= 0)
3523 {
3524 sigset_t ss;
3525
3526 sigemptyset (&ss);
3527 sigaddset (&ss, w->signum);
3528 sigdelset (&sigfd_set, w->signum);
3529
3530 signalfd (sigfd, &sigfd_set, 0);
3531 sigprocmask (SIG_UNBLOCK, &ss, 0);
3532 }
3533 else
3534#endif
3535 signal (w->signum, SIG_DFL);
3536 }
3537
3538 EV_FREQUENT_CHECK;
1541} 3539}
3540
3541#endif
3542
3543#if EV_CHILD_ENABLE
1542 3544
1543void 3545void
1544ev_prepare_start (EV_P_ struct ev_prepare *w) 3546ev_child_start (EV_P_ ev_child *w)
1545{ 3547{
3548#if EV_MULTIPLICITY
3549 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3550#endif
1546 if (expect_false (ev_is_active (w))) 3551 if (expect_false (ev_is_active (w)))
1547 return; 3552 return;
1548 3553
3554 EV_FREQUENT_CHECK;
3555
1549 ev_start (EV_A_ (W)w, ++preparecnt); 3556 ev_start (EV_A_ (W)w, 1);
1550 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3557 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1551 prepares [preparecnt - 1] = w; 3558
3559 EV_FREQUENT_CHECK;
1552} 3560}
1553 3561
1554void 3562void
1555ev_prepare_stop (EV_P_ struct ev_prepare *w) 3563ev_child_stop (EV_P_ ev_child *w)
1556{ 3564{
1557 ev_clear_pending (EV_A_ (W)w); 3565 clear_pending (EV_A_ (W)w);
1558 if (expect_false (!ev_is_active (w))) 3566 if (expect_false (!ev_is_active (w)))
1559 return; 3567 return;
1560 3568
1561 prepares [((W)w)->active - 1] = prepares [--preparecnt]; 3569 EV_FREQUENT_CHECK;
3570
3571 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1562 ev_stop (EV_A_ (W)w); 3572 ev_stop (EV_A_ (W)w);
3573
3574 EV_FREQUENT_CHECK;
1563} 3575}
3576
3577#endif
3578
3579#if EV_STAT_ENABLE
3580
3581# ifdef _WIN32
3582# undef lstat
3583# define lstat(a,b) _stati64 (a,b)
3584# endif
3585
3586#define DEF_STAT_INTERVAL 5.0074891
3587#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3588#define MIN_STAT_INTERVAL 0.1074891
3589
3590static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3591
3592#if EV_USE_INOTIFY
3593
3594/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3595# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3596
3597static void noinline
3598infy_add (EV_P_ ev_stat *w)
3599{
3600 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);
3601
3602 if (w->wd >= 0)
3603 {
3604 struct statfs sfs;
3605
3606 /* now local changes will be tracked by inotify, but remote changes won't */
3607 /* unless the filesystem is known to be local, we therefore still poll */
3608 /* also do poll on <2.6.25, but with normal frequency */
3609
3610 if (!fs_2625)
3611 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3612 else if (!statfs (w->path, &sfs)
3613 && (sfs.f_type == 0x1373 /* devfs */
3614 || sfs.f_type == 0xEF53 /* ext2/3 */
3615 || sfs.f_type == 0x3153464a /* jfs */
3616 || sfs.f_type == 0x52654973 /* reiser3 */
3617 || sfs.f_type == 0x01021994 /* tempfs */
3618 || sfs.f_type == 0x58465342 /* xfs */))
3619 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3620 else
3621 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3622 }
3623 else
3624 {
3625 /* can't use inotify, continue to stat */
3626 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3627
3628 /* if path is not there, monitor some parent directory for speedup hints */
3629 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3630 /* but an efficiency issue only */
3631 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3632 {
3633 char path [4096];
3634 strcpy (path, w->path);
3635
3636 do
3637 {
3638 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3639 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3640
3641 char *pend = strrchr (path, '/');
3642
3643 if (!pend || pend == path)
3644 break;
3645
3646 *pend = 0;
3647 w->wd = inotify_add_watch (fs_fd, path, mask);
3648 }
3649 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3650 }
3651 }
3652
3653 if (w->wd >= 0)
3654 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3655
3656 /* now re-arm timer, if required */
3657 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3658 ev_timer_again (EV_A_ &w->timer);
3659 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3660}
3661
3662static void noinline
3663infy_del (EV_P_ ev_stat *w)
3664{
3665 int slot;
3666 int wd = w->wd;
3667
3668 if (wd < 0)
3669 return;
3670
3671 w->wd = -2;
3672 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3673 wlist_del (&fs_hash [slot].head, (WL)w);
3674
3675 /* remove this watcher, if others are watching it, they will rearm */
3676 inotify_rm_watch (fs_fd, wd);
3677}
3678
3679static void noinline
3680infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3681{
3682 if (slot < 0)
3683 /* overflow, need to check for all hash slots */
3684 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3685 infy_wd (EV_A_ slot, wd, ev);
3686 else
3687 {
3688 WL w_;
3689
3690 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3691 {
3692 ev_stat *w = (ev_stat *)w_;
3693 w_ = w_->next; /* lets us remove this watcher and all before it */
3694
3695 if (w->wd == wd || wd == -1)
3696 {
3697 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3698 {
3699 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3700 w->wd = -1;
3701 infy_add (EV_A_ w); /* re-add, no matter what */
3702 }
3703
3704 stat_timer_cb (EV_A_ &w->timer, 0);
3705 }
3706 }
3707 }
3708}
3709
3710static void
3711infy_cb (EV_P_ ev_io *w, int revents)
3712{
3713 char buf [EV_INOTIFY_BUFSIZE];
3714 int ofs;
3715 int len = read (fs_fd, buf, sizeof (buf));
3716
3717 for (ofs = 0; ofs < len; )
3718 {
3719 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3720 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3721 ofs += sizeof (struct inotify_event) + ev->len;
3722 }
3723}
3724
3725inline_size void ecb_cold
3726ev_check_2625 (EV_P)
3727{
3728 /* kernels < 2.6.25 are borked
3729 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3730 */
3731 if (ev_linux_version () < 0x020619)
3732 return;
3733
3734 fs_2625 = 1;
3735}
3736
3737inline_size int
3738infy_newfd (void)
3739{
3740#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3741 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3742 if (fd >= 0)
3743 return fd;
3744#endif
3745 return inotify_init ();
3746}
3747
3748inline_size void
3749infy_init (EV_P)
3750{
3751 if (fs_fd != -2)
3752 return;
3753
3754 fs_fd = -1;
3755
3756 ev_check_2625 (EV_A);
3757
3758 fs_fd = infy_newfd ();
3759
3760 if (fs_fd >= 0)
3761 {
3762 fd_intern (fs_fd);
3763 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3764 ev_set_priority (&fs_w, EV_MAXPRI);
3765 ev_io_start (EV_A_ &fs_w);
3766 ev_unref (EV_A);
3767 }
3768}
3769
3770inline_size void
3771infy_fork (EV_P)
3772{
3773 int slot;
3774
3775 if (fs_fd < 0)
3776 return;
3777
3778 ev_ref (EV_A);
3779 ev_io_stop (EV_A_ &fs_w);
3780 close (fs_fd);
3781 fs_fd = infy_newfd ();
3782
3783 if (fs_fd >= 0)
3784 {
3785 fd_intern (fs_fd);
3786 ev_io_set (&fs_w, fs_fd, EV_READ);
3787 ev_io_start (EV_A_ &fs_w);
3788 ev_unref (EV_A);
3789 }
3790
3791 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3792 {
3793 WL w_ = fs_hash [slot].head;
3794 fs_hash [slot].head = 0;
3795
3796 while (w_)
3797 {
3798 ev_stat *w = (ev_stat *)w_;
3799 w_ = w_->next; /* lets us add this watcher */
3800
3801 w->wd = -1;
3802
3803 if (fs_fd >= 0)
3804 infy_add (EV_A_ w); /* re-add, no matter what */
3805 else
3806 {
3807 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3808 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3809 ev_timer_again (EV_A_ &w->timer);
3810 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3811 }
3812 }
3813 }
3814}
3815
3816#endif
3817
3818#ifdef _WIN32
3819# define EV_LSTAT(p,b) _stati64 (p, b)
3820#else
3821# define EV_LSTAT(p,b) lstat (p, b)
3822#endif
1564 3823
1565void 3824void
1566ev_check_start (EV_P_ struct ev_check *w) 3825ev_stat_stat (EV_P_ ev_stat *w)
3826{
3827 if (lstat (w->path, &w->attr) < 0)
3828 w->attr.st_nlink = 0;
3829 else if (!w->attr.st_nlink)
3830 w->attr.st_nlink = 1;
3831}
3832
3833static void noinline
3834stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3835{
3836 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3837
3838 ev_statdata prev = w->attr;
3839 ev_stat_stat (EV_A_ w);
3840
3841 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3842 if (
3843 prev.st_dev != w->attr.st_dev
3844 || prev.st_ino != w->attr.st_ino
3845 || prev.st_mode != w->attr.st_mode
3846 || prev.st_nlink != w->attr.st_nlink
3847 || prev.st_uid != w->attr.st_uid
3848 || prev.st_gid != w->attr.st_gid
3849 || prev.st_rdev != w->attr.st_rdev
3850 || prev.st_size != w->attr.st_size
3851 || prev.st_atime != w->attr.st_atime
3852 || prev.st_mtime != w->attr.st_mtime
3853 || prev.st_ctime != w->attr.st_ctime
3854 ) {
3855 /* we only update w->prev on actual differences */
3856 /* in case we test more often than invoke the callback, */
3857 /* to ensure that prev is always different to attr */
3858 w->prev = prev;
3859
3860 #if EV_USE_INOTIFY
3861 if (fs_fd >= 0)
3862 {
3863 infy_del (EV_A_ w);
3864 infy_add (EV_A_ w);
3865 ev_stat_stat (EV_A_ w); /* avoid race... */
3866 }
3867 #endif
3868
3869 ev_feed_event (EV_A_ w, EV_STAT);
3870 }
3871}
3872
3873void
3874ev_stat_start (EV_P_ ev_stat *w)
1567{ 3875{
1568 if (expect_false (ev_is_active (w))) 3876 if (expect_false (ev_is_active (w)))
1569 return; 3877 return;
1570 3878
3879 ev_stat_stat (EV_A_ w);
3880
3881 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3882 w->interval = MIN_STAT_INTERVAL;
3883
3884 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3885 ev_set_priority (&w->timer, ev_priority (w));
3886
3887#if EV_USE_INOTIFY
3888 infy_init (EV_A);
3889
3890 if (fs_fd >= 0)
3891 infy_add (EV_A_ w);
3892 else
3893#endif
3894 {
3895 ev_timer_again (EV_A_ &w->timer);
3896 ev_unref (EV_A);
3897 }
3898
1571 ev_start (EV_A_ (W)w, ++checkcnt); 3899 ev_start (EV_A_ (W)w, 1);
1572 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2); 3900
1573 checks [checkcnt - 1] = w; 3901 EV_FREQUENT_CHECK;
1574} 3902}
1575 3903
1576void 3904void
1577ev_check_stop (EV_P_ struct ev_check *w) 3905ev_stat_stop (EV_P_ ev_stat *w)
1578{ 3906{
1579 ev_clear_pending (EV_A_ (W)w); 3907 clear_pending (EV_A_ (W)w);
1580 if (expect_false (!ev_is_active (w))) 3908 if (expect_false (!ev_is_active (w)))
1581 return; 3909 return;
1582 3910
1583 checks [((W)w)->active - 1] = checks [--checkcnt]; 3911 EV_FREQUENT_CHECK;
3912
3913#if EV_USE_INOTIFY
3914 infy_del (EV_A_ w);
3915#endif
3916
3917 if (ev_is_active (&w->timer))
3918 {
3919 ev_ref (EV_A);
3920 ev_timer_stop (EV_A_ &w->timer);
3921 }
3922
1584 ev_stop (EV_A_ (W)w); 3923 ev_stop (EV_A_ (W)w);
1585}
1586 3924
1587#ifndef SA_RESTART 3925 EV_FREQUENT_CHECK;
1588# define SA_RESTART 0 3926}
1589#endif 3927#endif
1590 3928
3929#if EV_IDLE_ENABLE
1591void 3930void
1592ev_signal_start (EV_P_ struct ev_signal *w) 3931ev_idle_start (EV_P_ ev_idle *w)
1593{ 3932{
1594#if EV_MULTIPLICITY
1595 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1596#endif
1597 if (expect_false (ev_is_active (w))) 3933 if (expect_false (ev_is_active (w)))
1598 return; 3934 return;
1599 3935
1600 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3936 pri_adjust (EV_A_ (W)w);
1601 3937
3938 EV_FREQUENT_CHECK;
3939
3940 {
3941 int active = ++idlecnt [ABSPRI (w)];
3942
3943 ++idleall;
1602 ev_start (EV_A_ (W)w, 1); 3944 ev_start (EV_A_ (W)w, active);
1603 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1604 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1605 3945
1606 if (!((WL)w)->next) 3946 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1607 { 3947 idles [ABSPRI (w)][active - 1] = w;
1608#if _WIN32
1609 signal (w->signum, sighandler);
1610#else
1611 struct sigaction sa;
1612 sa.sa_handler = sighandler;
1613 sigfillset (&sa.sa_mask);
1614 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1615 sigaction (w->signum, &sa, 0);
1616#endif
1617 } 3948 }
3949
3950 EV_FREQUENT_CHECK;
1618} 3951}
1619 3952
1620void 3953void
1621ev_signal_stop (EV_P_ struct ev_signal *w) 3954ev_idle_stop (EV_P_ ev_idle *w)
1622{ 3955{
1623 ev_clear_pending (EV_A_ (W)w); 3956 clear_pending (EV_A_ (W)w);
1624 if (expect_false (!ev_is_active (w))) 3957 if (expect_false (!ev_is_active (w)))
1625 return; 3958 return;
1626 3959
1627 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3960 EV_FREQUENT_CHECK;
3961
3962 {
3963 int active = ev_active (w);
3964
3965 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3966 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3967
1628 ev_stop (EV_A_ (W)w); 3968 ev_stop (EV_A_ (W)w);
3969 --idleall;
3970 }
1629 3971
1630 if (!signals [w->signum - 1].head) 3972 EV_FREQUENT_CHECK;
1631 signal (w->signum, SIG_DFL);
1632} 3973}
3974#endif
1633 3975
3976#if EV_PREPARE_ENABLE
1634void 3977void
1635ev_child_start (EV_P_ struct ev_child *w) 3978ev_prepare_start (EV_P_ ev_prepare *w)
1636{ 3979{
1637#if EV_MULTIPLICITY
1638 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1639#endif
1640 if (expect_false (ev_is_active (w))) 3980 if (expect_false (ev_is_active (w)))
1641 return; 3981 return;
1642 3982
3983 EV_FREQUENT_CHECK;
3984
1643 ev_start (EV_A_ (W)w, 1); 3985 ev_start (EV_A_ (W)w, ++preparecnt);
1644 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3986 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3987 prepares [preparecnt - 1] = w;
3988
3989 EV_FREQUENT_CHECK;
1645} 3990}
1646 3991
1647void 3992void
1648ev_child_stop (EV_P_ struct ev_child *w) 3993ev_prepare_stop (EV_P_ ev_prepare *w)
1649{ 3994{
1650 ev_clear_pending (EV_A_ (W)w); 3995 clear_pending (EV_A_ (W)w);
1651 if (expect_false (!ev_is_active (w))) 3996 if (expect_false (!ev_is_active (w)))
1652 return; 3997 return;
1653 3998
1654 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3999 EV_FREQUENT_CHECK;
4000
4001 {
4002 int active = ev_active (w);
4003
4004 prepares [active - 1] = prepares [--preparecnt];
4005 ev_active (prepares [active - 1]) = active;
4006 }
4007
1655 ev_stop (EV_A_ (W)w); 4008 ev_stop (EV_A_ (W)w);
4009
4010 EV_FREQUENT_CHECK;
1656} 4011}
4012#endif
4013
4014#if EV_CHECK_ENABLE
4015void
4016ev_check_start (EV_P_ ev_check *w)
4017{
4018 if (expect_false (ev_is_active (w)))
4019 return;
4020
4021 EV_FREQUENT_CHECK;
4022
4023 ev_start (EV_A_ (W)w, ++checkcnt);
4024 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4025 checks [checkcnt - 1] = w;
4026
4027 EV_FREQUENT_CHECK;
4028}
4029
4030void
4031ev_check_stop (EV_P_ ev_check *w)
4032{
4033 clear_pending (EV_A_ (W)w);
4034 if (expect_false (!ev_is_active (w)))
4035 return;
4036
4037 EV_FREQUENT_CHECK;
4038
4039 {
4040 int active = ev_active (w);
4041
4042 checks [active - 1] = checks [--checkcnt];
4043 ev_active (checks [active - 1]) = active;
4044 }
4045
4046 ev_stop (EV_A_ (W)w);
4047
4048 EV_FREQUENT_CHECK;
4049}
4050#endif
4051
4052#if EV_EMBED_ENABLE
4053void noinline
4054ev_embed_sweep (EV_P_ ev_embed *w)
4055{
4056 ev_run (w->other, EVRUN_NOWAIT);
4057}
4058
4059static void
4060embed_io_cb (EV_P_ ev_io *io, int revents)
4061{
4062 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4063
4064 if (ev_cb (w))
4065 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4066 else
4067 ev_run (w->other, EVRUN_NOWAIT);
4068}
4069
4070static void
4071embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4072{
4073 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4074
4075 {
4076 EV_P = w->other;
4077
4078 while (fdchangecnt)
4079 {
4080 fd_reify (EV_A);
4081 ev_run (EV_A_ EVRUN_NOWAIT);
4082 }
4083 }
4084}
4085
4086static void
4087embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4088{
4089 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4090
4091 ev_embed_stop (EV_A_ w);
4092
4093 {
4094 EV_P = w->other;
4095
4096 ev_loop_fork (EV_A);
4097 ev_run (EV_A_ EVRUN_NOWAIT);
4098 }
4099
4100 ev_embed_start (EV_A_ w);
4101}
4102
4103#if 0
4104static void
4105embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4106{
4107 ev_idle_stop (EV_A_ idle);
4108}
4109#endif
4110
4111void
4112ev_embed_start (EV_P_ ev_embed *w)
4113{
4114 if (expect_false (ev_is_active (w)))
4115 return;
4116
4117 {
4118 EV_P = w->other;
4119 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4120 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4121 }
4122
4123 EV_FREQUENT_CHECK;
4124
4125 ev_set_priority (&w->io, ev_priority (w));
4126 ev_io_start (EV_A_ &w->io);
4127
4128 ev_prepare_init (&w->prepare, embed_prepare_cb);
4129 ev_set_priority (&w->prepare, EV_MINPRI);
4130 ev_prepare_start (EV_A_ &w->prepare);
4131
4132 ev_fork_init (&w->fork, embed_fork_cb);
4133 ev_fork_start (EV_A_ &w->fork);
4134
4135 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4136
4137 ev_start (EV_A_ (W)w, 1);
4138
4139 EV_FREQUENT_CHECK;
4140}
4141
4142void
4143ev_embed_stop (EV_P_ ev_embed *w)
4144{
4145 clear_pending (EV_A_ (W)w);
4146 if (expect_false (!ev_is_active (w)))
4147 return;
4148
4149 EV_FREQUENT_CHECK;
4150
4151 ev_io_stop (EV_A_ &w->io);
4152 ev_prepare_stop (EV_A_ &w->prepare);
4153 ev_fork_stop (EV_A_ &w->fork);
4154
4155 ev_stop (EV_A_ (W)w);
4156
4157 EV_FREQUENT_CHECK;
4158}
4159#endif
4160
4161#if EV_FORK_ENABLE
4162void
4163ev_fork_start (EV_P_ ev_fork *w)
4164{
4165 if (expect_false (ev_is_active (w)))
4166 return;
4167
4168 EV_FREQUENT_CHECK;
4169
4170 ev_start (EV_A_ (W)w, ++forkcnt);
4171 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4172 forks [forkcnt - 1] = w;
4173
4174 EV_FREQUENT_CHECK;
4175}
4176
4177void
4178ev_fork_stop (EV_P_ ev_fork *w)
4179{
4180 clear_pending (EV_A_ (W)w);
4181 if (expect_false (!ev_is_active (w)))
4182 return;
4183
4184 EV_FREQUENT_CHECK;
4185
4186 {
4187 int active = ev_active (w);
4188
4189 forks [active - 1] = forks [--forkcnt];
4190 ev_active (forks [active - 1]) = active;
4191 }
4192
4193 ev_stop (EV_A_ (W)w);
4194
4195 EV_FREQUENT_CHECK;
4196}
4197#endif
4198
4199#if EV_CLEANUP_ENABLE
4200void
4201ev_cleanup_start (EV_P_ ev_cleanup *w)
4202{
4203 if (expect_false (ev_is_active (w)))
4204 return;
4205
4206 EV_FREQUENT_CHECK;
4207
4208 ev_start (EV_A_ (W)w, ++cleanupcnt);
4209 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4210 cleanups [cleanupcnt - 1] = w;
4211
4212 /* cleanup watchers should never keep a refcount on the loop */
4213 ev_unref (EV_A);
4214 EV_FREQUENT_CHECK;
4215}
4216
4217void
4218ev_cleanup_stop (EV_P_ ev_cleanup *w)
4219{
4220 clear_pending (EV_A_ (W)w);
4221 if (expect_false (!ev_is_active (w)))
4222 return;
4223
4224 EV_FREQUENT_CHECK;
4225 ev_ref (EV_A);
4226
4227 {
4228 int active = ev_active (w);
4229
4230 cleanups [active - 1] = cleanups [--cleanupcnt];
4231 ev_active (cleanups [active - 1]) = active;
4232 }
4233
4234 ev_stop (EV_A_ (W)w);
4235
4236 EV_FREQUENT_CHECK;
4237}
4238#endif
4239
4240#if EV_ASYNC_ENABLE
4241void
4242ev_async_start (EV_P_ ev_async *w)
4243{
4244 if (expect_false (ev_is_active (w)))
4245 return;
4246
4247 w->sent = 0;
4248
4249 evpipe_init (EV_A);
4250
4251 EV_FREQUENT_CHECK;
4252
4253 ev_start (EV_A_ (W)w, ++asynccnt);
4254 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4255 asyncs [asynccnt - 1] = w;
4256
4257 EV_FREQUENT_CHECK;
4258}
4259
4260void
4261ev_async_stop (EV_P_ ev_async *w)
4262{
4263 clear_pending (EV_A_ (W)w);
4264 if (expect_false (!ev_is_active (w)))
4265 return;
4266
4267 EV_FREQUENT_CHECK;
4268
4269 {
4270 int active = ev_active (w);
4271
4272 asyncs [active - 1] = asyncs [--asynccnt];
4273 ev_active (asyncs [active - 1]) = active;
4274 }
4275
4276 ev_stop (EV_A_ (W)w);
4277
4278 EV_FREQUENT_CHECK;
4279}
4280
4281void
4282ev_async_send (EV_P_ ev_async *w)
4283{
4284 w->sent = 1;
4285 evpipe_write (EV_A_ &async_pending);
4286}
4287#endif
1657 4288
1658/*****************************************************************************/ 4289/*****************************************************************************/
1659 4290
1660struct ev_once 4291struct ev_once
1661{ 4292{
1662 struct ev_io io; 4293 ev_io io;
1663 struct ev_timer to; 4294 ev_timer to;
1664 void (*cb)(int revents, void *arg); 4295 void (*cb)(int revents, void *arg);
1665 void *arg; 4296 void *arg;
1666}; 4297};
1667 4298
1668static void 4299static void
1669once_cb (EV_P_ struct ev_once *once, int revents) 4300once_cb (EV_P_ struct ev_once *once, int revents)
1670{ 4301{
1671 void (*cb)(int revents, void *arg) = once->cb; 4302 void (*cb)(int revents, void *arg) = once->cb;
1672 void *arg = once->arg; 4303 void *arg = once->arg;
1673 4304
1674 ev_io_stop (EV_A_ &once->io); 4305 ev_io_stop (EV_A_ &once->io);
1675 ev_timer_stop (EV_A_ &once->to); 4306 ev_timer_stop (EV_A_ &once->to);
1676 ev_free (once); 4307 ev_free (once);
1677 4308
1678 cb (revents, arg); 4309 cb (revents, arg);
1679} 4310}
1680 4311
1681static void 4312static void
1682once_cb_io (EV_P_ struct ev_io *w, int revents) 4313once_cb_io (EV_P_ ev_io *w, int revents)
1683{ 4314{
1684 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4315 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4316
4317 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1685} 4318}
1686 4319
1687static void 4320static void
1688once_cb_to (EV_P_ struct ev_timer *w, int revents) 4321once_cb_to (EV_P_ ev_timer *w, int revents)
1689{ 4322{
1690 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4323 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4324
4325 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1691} 4326}
1692 4327
1693void 4328void
1694ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4329ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1695{ 4330{
1696 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4331 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1697 4332
1698 if (expect_false (!once)) 4333 if (expect_false (!once))
1699 { 4334 {
1700 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4335 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1701 return; 4336 return;
1702 } 4337 }
1703 4338
1704 once->cb = cb; 4339 once->cb = cb;
1705 once->arg = arg; 4340 once->arg = arg;
… …
1717 ev_timer_set (&once->to, timeout, 0.); 4352 ev_timer_set (&once->to, timeout, 0.);
1718 ev_timer_start (EV_A_ &once->to); 4353 ev_timer_start (EV_A_ &once->to);
1719 } 4354 }
1720} 4355}
1721 4356
1722#ifdef __cplusplus 4357/*****************************************************************************/
1723} 4358
4359#if EV_WALK_ENABLE
4360void ecb_cold
4361ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4362{
4363 int i, j;
4364 ev_watcher_list *wl, *wn;
4365
4366 if (types & (EV_IO | EV_EMBED))
4367 for (i = 0; i < anfdmax; ++i)
4368 for (wl = anfds [i].head; wl; )
4369 {
4370 wn = wl->next;
4371
4372#if EV_EMBED_ENABLE
4373 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4374 {
4375 if (types & EV_EMBED)
4376 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4377 }
4378 else
4379#endif
4380#if EV_USE_INOTIFY
4381 if (ev_cb ((ev_io *)wl) == infy_cb)
4382 ;
4383 else
4384#endif
4385 if ((ev_io *)wl != &pipe_w)
4386 if (types & EV_IO)
4387 cb (EV_A_ EV_IO, wl);
4388
4389 wl = wn;
4390 }
4391
4392 if (types & (EV_TIMER | EV_STAT))
4393 for (i = timercnt + HEAP0; i-- > HEAP0; )
4394#if EV_STAT_ENABLE
4395 /*TODO: timer is not always active*/
4396 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4397 {
4398 if (types & EV_STAT)
4399 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4400 }
4401 else
4402#endif
4403 if (types & EV_TIMER)
4404 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4405
4406#if EV_PERIODIC_ENABLE
4407 if (types & EV_PERIODIC)
4408 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4409 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4410#endif
4411
4412#if EV_IDLE_ENABLE
4413 if (types & EV_IDLE)
4414 for (j = NUMPRI; j--; )
4415 for (i = idlecnt [j]; i--; )
4416 cb (EV_A_ EV_IDLE, idles [j][i]);
4417#endif
4418
4419#if EV_FORK_ENABLE
4420 if (types & EV_FORK)
4421 for (i = forkcnt; i--; )
4422 if (ev_cb (forks [i]) != embed_fork_cb)
4423 cb (EV_A_ EV_FORK, forks [i]);
4424#endif
4425
4426#if EV_ASYNC_ENABLE
4427 if (types & EV_ASYNC)
4428 for (i = asynccnt; i--; )
4429 cb (EV_A_ EV_ASYNC, asyncs [i]);
4430#endif
4431
4432#if EV_PREPARE_ENABLE
4433 if (types & EV_PREPARE)
4434 for (i = preparecnt; i--; )
4435# if EV_EMBED_ENABLE
4436 if (ev_cb (prepares [i]) != embed_prepare_cb)
1724#endif 4437# endif
4438 cb (EV_A_ EV_PREPARE, prepares [i]);
4439#endif
1725 4440
4441#if EV_CHECK_ENABLE
4442 if (types & EV_CHECK)
4443 for (i = checkcnt; i--; )
4444 cb (EV_A_ EV_CHECK, checks [i]);
4445#endif
4446
4447#if EV_SIGNAL_ENABLE
4448 if (types & EV_SIGNAL)
4449 for (i = 0; i < EV_NSIG - 1; ++i)
4450 for (wl = signals [i].head; wl; )
4451 {
4452 wn = wl->next;
4453 cb (EV_A_ EV_SIGNAL, wl);
4454 wl = wn;
4455 }
4456#endif
4457
4458#if EV_CHILD_ENABLE
4459 if (types & EV_CHILD)
4460 for (i = (EV_PID_HASHSIZE); i--; )
4461 for (wl = childs [i]; wl; )
4462 {
4463 wn = wl->next;
4464 cb (EV_A_ EV_CHILD, wl);
4465 wl = wn;
4466 }
4467#endif
4468/* EV_STAT 0x00001000 /* stat data changed */
4469/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4470}
4471#endif
4472
4473#if EV_MULTIPLICITY
4474 #include "ev_wrap.h"
4475#endif
4476

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines