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Comparing libev/ev.c (file contents):
Revision 1.84 by root, Fri Nov 9 23:04:35 2007 UTC vs.
Revision 1.430 by root, Wed May 9 16:50:23 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) 2007,2008,2009,2010,2011,2012 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 */
39
40/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# 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
33 67
34# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
81# endif
37# endif 82# endif
38 83
84# if HAVE_NANOSLEEP
85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
91# endif
92
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
40# define EV_USE_SELECT 1 99# define EV_USE_SELECT 0
41# endif 100# endif
42 101
43# if HAVE_POLL && HAVE_POLL_H 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
44# define EV_USE_POLL 1 108# define EV_USE_POLL 0
45# endif 109# endif
46 110
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
48# define EV_USE_EPOLL 1 117# define EV_USE_EPOLL 0
49# endif 118# endif
50 119
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
52# define EV_USE_KQUEUE 1 126# define EV_USE_KQUEUE 0
53# endif 127# endif
54 128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
55#endif 136# endif
56 137
57#include <math.h> 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
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
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
58#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
59#include <fcntl.h> 169#include <fcntl.h>
60#include <stddef.h> 170#include <stddef.h>
61 171
62#include <stdio.h> 172#include <stdio.h>
63 173
64#include <assert.h> 174#include <assert.h>
65#include <errno.h> 175#include <errno.h>
66#include <sys/types.h> 176#include <sys/types.h>
67#include <time.h> 177#include <time.h>
178#include <limits.h>
68 179
69#include <signal.h> 180#include <signal.h>
70
71#ifndef WIN32
72# include <unistd.h>
73# include <sys/time.h>
74# include <sys/wait.h>
75#endif
76/**/
77
78#ifndef EV_USE_MONOTONIC
79# define EV_USE_MONOTONIC 1
80#endif
81
82#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1
84#endif
85
86#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
88#endif
89
90#ifndef EV_USE_EPOLL
91# define EV_USE_EPOLL 0
92#endif
93
94#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0
96#endif
97
98#ifndef EV_USE_WIN32
99# ifdef WIN32
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else
104# define EV_USE_WIN32 0
105# endif
106#endif
107
108#ifndef EV_USE_REALTIME
109# define EV_USE_REALTIME 1
110#endif
111
112/**/
113
114#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0
117#endif
118
119#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0
122#endif
123
124/**/
125
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
130 181
131#ifdef EV_H 182#ifdef EV_H
132# include EV_H 183# include EV_H
133#else 184#else
134# include "ev.h" 185# include "ev.h"
135#endif 186#endif
136 187
137#if __GNUC__ >= 3 188#if EV_NO_THREADS
138# define expect(expr,value) __builtin_expect ((expr),(value)) 189# undef EV_NO_SMP
139# define inline inline 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
199#ifndef _WIN32
200# include <sys/time.h>
201# include <sys/wait.h>
202# include <unistd.h>
140#else 203#else
141# define expect(expr,value) (expr) 204# include <io.h>
142# define inline static 205# define WIN32_LEAN_AND_MEAN
206# include <windows.h>
207# include <winsock2.h>
208# ifndef EV_SELECT_IS_WINSOCKET
209# define EV_SELECT_IS_WINSOCKET 1
143#endif 210# endif
211# undef EV_AVOID_STDIO
212#endif
144 213
145#define expect_false(expr) expect ((expr) != 0, 0) 214/* OS X, in its infinite idiocy, actually HARDCODES
146#define expect_true(expr) expect ((expr) != 0, 1) 215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
147 221
148#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 222/* this block tries to deduce configuration from header-defined symbols and defaults */
149#define ABSPRI(w) ((w)->priority - EV_MINPRI)
150 223
151typedef struct ev_watcher *W; 224/* try to deduce the maximum number of signals on this platform */
152typedef struct ev_watcher_list *WL; 225#if defined EV_NSIG
153typedef struct ev_watcher_time *WT; 226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
154 251
155static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
156 255
157#include "ev_win32.c" 256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
261# endif
262#endif
263
264#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
268# define EV_USE_MONOTONIC 0
269# endif
270#endif
271
272#ifndef EV_USE_REALTIME
273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
274#endif
275
276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
280# define EV_USE_NANOSLEEP 0
281# endif
282#endif
283
284#ifndef EV_USE_SELECT
285# define EV_USE_SELECT EV_FEATURE_BACKENDS
286#endif
287
288#ifndef EV_USE_POLL
289# ifdef _WIN32
290# define EV_USE_POLL 0
291# else
292# define EV_USE_POLL EV_FEATURE_BACKENDS
293# endif
294#endif
295
296#ifndef EV_USE_EPOLL
297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
299# else
300# define EV_USE_EPOLL 0
301# endif
302#endif
303
304#ifndef EV_USE_KQUEUE
305# define EV_USE_KQUEUE 0
306#endif
307
308#ifndef EV_USE_PORT
309# define EV_USE_PORT 0
310#endif
311
312#ifndef EV_USE_INOTIFY
313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314# define EV_USE_INOTIFY EV_FEATURE_OS
315# else
316# define EV_USE_INOTIFY 0
317# endif
318#endif
319
320#ifndef EV_PID_HASHSIZE
321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
322#endif
323
324#ifndef EV_INOTIFY_HASHSIZE
325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
326#endif
327
328#ifndef EV_USE_EVENTFD
329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
330# define EV_USE_EVENTFD EV_FEATURE_OS
331# else
332# define EV_USE_EVENTFD 0
333# endif
334#endif
335
336#ifndef EV_USE_SIGNALFD
337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
338# define EV_USE_SIGNALFD EV_FEATURE_OS
339# else
340# define EV_USE_SIGNALFD 0
341# endif
342#endif
343
344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
383
384#ifndef CLOCK_MONOTONIC
385# undef EV_USE_MONOTONIC
386# define EV_USE_MONOTONIC 0
387#endif
388
389#ifndef CLOCK_REALTIME
390# undef EV_USE_REALTIME
391# define EV_USE_REALTIME 0
392#endif
393
394#if !EV_STAT_ENABLE
395# undef EV_USE_INOTIFY
396# define EV_USE_INOTIFY 0
397#endif
398
399#if !EV_USE_NANOSLEEP
400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
402# include <sys/select.h>
403# endif
404#endif
405
406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
413# endif
414#endif
415
416#if EV_USE_EVENTFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef EFD_NONBLOCK
420# define EFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef EFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define EFD_CLOEXEC O_CLOEXEC
425# else
426# define EFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
430#endif
431
432#if EV_USE_SIGNALFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef SFD_NONBLOCK
436# define SFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef SFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define SFD_CLOEXEC O_CLOEXEC
441# else
442# define SFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
446
447struct signalfd_siginfo
448{
449 uint32_t ssi_signo;
450 char pad[128 - sizeof (uint32_t)];
451};
452#endif
453
454/**/
455
456#if EV_VERIFY >= 3
457# define EV_FREQUENT_CHECK ev_verify (EV_A)
458#else
459# define EV_FREQUENT_CHECK do { } while (0)
460#endif
461
462/*
463 * This is used to work around floating point rounding problems.
464 * This value is good at least till the year 4000.
465 */
466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
468
469#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
471
472#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
473#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
493 *
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
504 */
505
506#ifndef ECB_H
507#define ECB_H
508
509#ifdef _WIN32
510 typedef signed char int8_t;
511 typedef unsigned char uint8_t;
512 typedef signed short int16_t;
513 typedef unsigned short uint16_t;
514 typedef signed int int32_t;
515 typedef unsigned int uint32_t;
516 #if __GNUC__
517 typedef signed long long int64_t;
518 typedef unsigned long long uint64_t;
519 #else /* _MSC_VER || __BORLANDC__ */
520 typedef signed __int64 int64_t;
521 typedef unsigned __int64 uint64_t;
522 #endif
523#else
524 #include <inttypes.h>
525#endif
526
527/* many compilers define _GNUC_ to some versions but then only implement
528 * what their idiot authors think are the "more important" extensions,
529 * causing enormous grief in return for some better fake benchmark numbers.
530 * or so.
531 * we try to detect these and simply assume they are not gcc - if they have
532 * an issue with that they should have done it right in the first place.
533 */
534#ifndef ECB_GCC_VERSION
535 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
536 #define ECB_GCC_VERSION(major,minor) 0
537 #else
538 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
539 #endif
540#endif
158 541
159/*****************************************************************************/ 542/*****************************************************************************/
160 543
544/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
545/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
546
547#if ECB_NO_THREADS
548# define ECB_NO_SMP 1
549#endif
550
551#if ECB_NO_THREADS || ECB_NO_SMP
552 #define ECB_MEMORY_FENCE do { } while (0)
553#endif
554
555#ifndef ECB_MEMORY_FENCE
556 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
557 #if __i386 || __i386__
558 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
559 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
560 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
561 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
563 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
564 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
565 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
566 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
567 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
568 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
570 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
571 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
573 #elif __sparc || __sparc__
574 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
575 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
576 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
577 #elif defined __s390__ || defined __s390x__
578 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
579 #elif defined __mips__
580 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
581 #elif defined __alpha__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
583 #endif
584 #endif
585#endif
586
587#ifndef ECB_MEMORY_FENCE
588 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
589 #define ECB_MEMORY_FENCE __sync_synchronize ()
590 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
591 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
592 #elif _MSC_VER >= 1400 /* VC++ 2005 */
593 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
594 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
595 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
596 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
597 #elif defined _WIN32
598 #include <WinNT.h>
599 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
600 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
601 #include <mbarrier.h>
602 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
603 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
604 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
605 #elif __xlC__
606 #define ECB_MEMORY_FENCE __sync ()
607 #endif
608#endif
609
610#ifndef ECB_MEMORY_FENCE
611 #if !ECB_AVOID_PTHREADS
612 /*
613 * if you get undefined symbol references to pthread_mutex_lock,
614 * or failure to find pthread.h, then you should implement
615 * the ECB_MEMORY_FENCE operations for your cpu/compiler
616 * OR provide pthread.h and link against the posix thread library
617 * of your system.
618 */
619 #include <pthread.h>
620 #define ECB_NEEDS_PTHREADS 1
621 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
622
623 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
624 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
625 #endif
626#endif
627
628#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
629 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
630#endif
631
632#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
633 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
634#endif
635
636/*****************************************************************************/
637
638#define ECB_C99 (__STDC_VERSION__ >= 199901L)
639
640#if __cplusplus
641 #define ecb_inline static inline
642#elif ECB_GCC_VERSION(2,5)
643 #define ecb_inline static __inline__
644#elif ECB_C99
645 #define ecb_inline static inline
646#else
647 #define ecb_inline static
648#endif
649
650#if ECB_GCC_VERSION(3,3)
651 #define ecb_restrict __restrict__
652#elif ECB_C99
653 #define ecb_restrict restrict
654#else
655 #define ecb_restrict
656#endif
657
658typedef int ecb_bool;
659
660#define ECB_CONCAT_(a, b) a ## b
661#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
662#define ECB_STRINGIFY_(a) # a
663#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
664
665#define ecb_function_ ecb_inline
666
667#if ECB_GCC_VERSION(3,1)
668 #define ecb_attribute(attrlist) __attribute__(attrlist)
669 #define ecb_is_constant(expr) __builtin_constant_p (expr)
670 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
671 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
672#else
673 #define ecb_attribute(attrlist)
674 #define ecb_is_constant(expr) 0
675 #define ecb_expect(expr,value) (expr)
676 #define ecb_prefetch(addr,rw,locality)
677#endif
678
679/* no emulation for ecb_decltype */
680#if ECB_GCC_VERSION(4,5)
681 #define ecb_decltype(x) __decltype(x)
682#elif ECB_GCC_VERSION(3,0)
683 #define ecb_decltype(x) __typeof(x)
684#endif
685
686#define ecb_noinline ecb_attribute ((__noinline__))
687#define ecb_noreturn ecb_attribute ((__noreturn__))
688#define ecb_unused ecb_attribute ((__unused__))
689#define ecb_const ecb_attribute ((__const__))
690#define ecb_pure ecb_attribute ((__pure__))
691
692#if ECB_GCC_VERSION(4,3)
693 #define ecb_artificial ecb_attribute ((__artificial__))
694 #define ecb_hot ecb_attribute ((__hot__))
695 #define ecb_cold ecb_attribute ((__cold__))
696#else
697 #define ecb_artificial
698 #define ecb_hot
699 #define ecb_cold
700#endif
701
702/* put around conditional expressions if you are very sure that the */
703/* expression is mostly true or mostly false. note that these return */
704/* booleans, not the expression. */
705#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
706#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
707/* for compatibility to the rest of the world */
708#define ecb_likely(expr) ecb_expect_true (expr)
709#define ecb_unlikely(expr) ecb_expect_false (expr)
710
711/* count trailing zero bits and count # of one bits */
712#if ECB_GCC_VERSION(3,4)
713 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
714 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
715 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
716 #define ecb_ctz32(x) __builtin_ctz (x)
717 #define ecb_ctz64(x) __builtin_ctzll (x)
718 #define ecb_popcount32(x) __builtin_popcount (x)
719 /* no popcountll */
720#else
721 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
722 ecb_function_ int
723 ecb_ctz32 (uint32_t x)
724 {
725 int r = 0;
726
727 x &= ~x + 1; /* this isolates the lowest bit */
728
729#if ECB_branchless_on_i386
730 r += !!(x & 0xaaaaaaaa) << 0;
731 r += !!(x & 0xcccccccc) << 1;
732 r += !!(x & 0xf0f0f0f0) << 2;
733 r += !!(x & 0xff00ff00) << 3;
734 r += !!(x & 0xffff0000) << 4;
735#else
736 if (x & 0xaaaaaaaa) r += 1;
737 if (x & 0xcccccccc) r += 2;
738 if (x & 0xf0f0f0f0) r += 4;
739 if (x & 0xff00ff00) r += 8;
740 if (x & 0xffff0000) r += 16;
741#endif
742
743 return r;
744 }
745
746 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
747 ecb_function_ int
748 ecb_ctz64 (uint64_t x)
749 {
750 int shift = x & 0xffffffffU ? 0 : 32;
751 return ecb_ctz32 (x >> shift) + shift;
752 }
753
754 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
755 ecb_function_ int
756 ecb_popcount32 (uint32_t x)
757 {
758 x -= (x >> 1) & 0x55555555;
759 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
760 x = ((x >> 4) + x) & 0x0f0f0f0f;
761 x *= 0x01010101;
762
763 return x >> 24;
764 }
765
766 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
767 ecb_function_ int ecb_ld32 (uint32_t x)
768 {
769 int r = 0;
770
771 if (x >> 16) { x >>= 16; r += 16; }
772 if (x >> 8) { x >>= 8; r += 8; }
773 if (x >> 4) { x >>= 4; r += 4; }
774 if (x >> 2) { x >>= 2; r += 2; }
775 if (x >> 1) { r += 1; }
776
777 return r;
778 }
779
780 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
781 ecb_function_ int ecb_ld64 (uint64_t x)
782 {
783 int r = 0;
784
785 if (x >> 32) { x >>= 32; r += 32; }
786
787 return r + ecb_ld32 (x);
788 }
789#endif
790
791ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
792ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
793{
794 return ( (x * 0x0802U & 0x22110U)
795 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
796}
797
798ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
799ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
800{
801 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
802 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
803 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
804 x = ( x >> 8 ) | ( x << 8);
805
806 return x;
807}
808
809ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
810ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
811{
812 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
813 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
814 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
815 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
816 x = ( x >> 16 ) | ( x << 16);
817
818 return x;
819}
820
821/* popcount64 is only available on 64 bit cpus as gcc builtin */
822/* so for this version we are lazy */
823ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
824ecb_function_ int
825ecb_popcount64 (uint64_t x)
826{
827 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
828}
829
830ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
831ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
832ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
833ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
834ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
835ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
836ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
837ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
838
839ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
840ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
841ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
842ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
843ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
844ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
845ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
846ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
847
848#if ECB_GCC_VERSION(4,3)
849 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
850 #define ecb_bswap32(x) __builtin_bswap32 (x)
851 #define ecb_bswap64(x) __builtin_bswap64 (x)
852#else
853 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
854 ecb_function_ uint16_t
855 ecb_bswap16 (uint16_t x)
856 {
857 return ecb_rotl16 (x, 8);
858 }
859
860 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
861 ecb_function_ uint32_t
862 ecb_bswap32 (uint32_t x)
863 {
864 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
865 }
866
867 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
868 ecb_function_ uint64_t
869 ecb_bswap64 (uint64_t x)
870 {
871 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
872 }
873#endif
874
875#if ECB_GCC_VERSION(4,5)
876 #define ecb_unreachable() __builtin_unreachable ()
877#else
878 /* this seems to work fine, but gcc always emits a warning for it :/ */
879 ecb_inline void ecb_unreachable (void) ecb_noreturn;
880 ecb_inline void ecb_unreachable (void) { }
881#endif
882
883/* try to tell the compiler that some condition is definitely true */
884#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
885
886ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
887ecb_inline unsigned char
888ecb_byteorder_helper (void)
889{
890 const uint32_t u = 0x11223344;
891 return *(unsigned char *)&u;
892}
893
894ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
895ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
896ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
897ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
898
899#if ECB_GCC_VERSION(3,0) || ECB_C99
900 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
901#else
902 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
903#endif
904
905#if __cplusplus
906 template<typename T>
907 static inline T ecb_div_rd (T val, T div)
908 {
909 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
910 }
911 template<typename T>
912 static inline T ecb_div_ru (T val, T div)
913 {
914 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
915 }
916#else
917 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
918 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
919#endif
920
921#if ecb_cplusplus_does_not_suck
922 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
923 template<typename T, int N>
924 static inline int ecb_array_length (const T (&arr)[N])
925 {
926 return N;
927 }
928#else
929 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
930#endif
931
932#endif
933
934/* ECB.H END */
935
936#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
937/* if your architecture doesn't need memory fences, e.g. because it is
938 * single-cpu/core, or if you use libev in a project that doesn't use libev
939 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
940 * libev, in which cases the memory fences become nops.
941 * alternatively, you can remove this #error and link against libpthread,
942 * which will then provide the memory fences.
943 */
944# error "memory fences not defined for your architecture, please report"
945#endif
946
947#ifndef ECB_MEMORY_FENCE
948# define ECB_MEMORY_FENCE do { } while (0)
949# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
950# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
951#endif
952
953#define expect_false(cond) ecb_expect_false (cond)
954#define expect_true(cond) ecb_expect_true (cond)
955#define noinline ecb_noinline
956
957#define inline_size ecb_inline
958
959#if EV_FEATURE_CODE
960# define inline_speed ecb_inline
961#else
962# define inline_speed static noinline
963#endif
964
965#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
966
967#if EV_MINPRI == EV_MAXPRI
968# define ABSPRI(w) (((W)w), 0)
969#else
970# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
971#endif
972
973#define EMPTY /* required for microsofts broken pseudo-c compiler */
974#define EMPTY2(a,b) /* used to suppress some warnings */
975
976typedef ev_watcher *W;
977typedef ev_watcher_list *WL;
978typedef ev_watcher_time *WT;
979
980#define ev_active(w) ((W)(w))->active
981#define ev_at(w) ((WT)(w))->at
982
983#if EV_USE_REALTIME
984/* sig_atomic_t is used to avoid per-thread variables or locking but still */
985/* giving it a reasonably high chance of working on typical architectures */
986static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
987#endif
988
989#if EV_USE_MONOTONIC
990static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
991#endif
992
993#ifndef EV_FD_TO_WIN32_HANDLE
994# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
995#endif
996#ifndef EV_WIN32_HANDLE_TO_FD
997# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
998#endif
999#ifndef EV_WIN32_CLOSE_FD
1000# define EV_WIN32_CLOSE_FD(fd) close (fd)
1001#endif
1002
1003#ifdef _WIN32
1004# include "ev_win32.c"
1005#endif
1006
1007/*****************************************************************************/
1008
1009/* define a suitable floor function (only used by periodics atm) */
1010
1011#if EV_USE_FLOOR
1012# include <math.h>
1013# define ev_floor(v) floor (v)
1014#else
1015
1016#include <float.h>
1017
1018/* a floor() replacement function, should be independent of ev_tstamp type */
1019static ev_tstamp noinline
1020ev_floor (ev_tstamp v)
1021{
1022 /* the choice of shift factor is not terribly important */
1023#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1024 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1025#else
1026 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1027#endif
1028
1029 /* argument too large for an unsigned long? */
1030 if (expect_false (v >= shift))
1031 {
1032 ev_tstamp f;
1033
1034 if (v == v - 1.)
1035 return v; /* very large number */
1036
1037 f = shift * ev_floor (v * (1. / shift));
1038 return f + ev_floor (v - f);
1039 }
1040
1041 /* special treatment for negative args? */
1042 if (expect_false (v < 0.))
1043 {
1044 ev_tstamp f = -ev_floor (-v);
1045
1046 return f - (f == v ? 0 : 1);
1047 }
1048
1049 /* fits into an unsigned long */
1050 return (unsigned long)v;
1051}
1052
1053#endif
1054
1055/*****************************************************************************/
1056
1057#ifdef __linux
1058# include <sys/utsname.h>
1059#endif
1060
1061static unsigned int noinline ecb_cold
1062ev_linux_version (void)
1063{
1064#ifdef __linux
1065 unsigned int v = 0;
1066 struct utsname buf;
1067 int i;
1068 char *p = buf.release;
1069
1070 if (uname (&buf))
1071 return 0;
1072
1073 for (i = 3+1; --i; )
1074 {
1075 unsigned int c = 0;
1076
1077 for (;;)
1078 {
1079 if (*p >= '0' && *p <= '9')
1080 c = c * 10 + *p++ - '0';
1081 else
1082 {
1083 p += *p == '.';
1084 break;
1085 }
1086 }
1087
1088 v = (v << 8) | c;
1089 }
1090
1091 return v;
1092#else
1093 return 0;
1094#endif
1095}
1096
1097/*****************************************************************************/
1098
1099#if EV_AVOID_STDIO
1100static void noinline ecb_cold
1101ev_printerr (const char *msg)
1102{
1103 write (STDERR_FILENO, msg, strlen (msg));
1104}
1105#endif
1106
161static void (*syserr_cb)(const char *msg); 1107static void (*syserr_cb)(const char *msg) EV_THROW;
162 1108
1109void ecb_cold
163void ev_set_syserr_cb (void (*cb)(const char *msg)) 1110ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
164{ 1111{
165 syserr_cb = cb; 1112 syserr_cb = cb;
166} 1113}
167 1114
168static void 1115static void noinline ecb_cold
169syserr (const char *msg) 1116ev_syserr (const char *msg)
170{ 1117{
171 if (!msg) 1118 if (!msg)
172 msg = "(libev) system error"; 1119 msg = "(libev) system error";
173 1120
174 if (syserr_cb) 1121 if (syserr_cb)
175 syserr_cb (msg); 1122 syserr_cb (msg);
176 else 1123 else
177 { 1124 {
1125#if EV_AVOID_STDIO
1126 ev_printerr (msg);
1127 ev_printerr (": ");
1128 ev_printerr (strerror (errno));
1129 ev_printerr ("\n");
1130#else
178 perror (msg); 1131 perror (msg);
1132#endif
179 abort (); 1133 abort ();
180 } 1134 }
181} 1135}
182 1136
1137static void *
1138ev_realloc_emul (void *ptr, long size)
1139{
1140#if __GLIBC__
1141 return realloc (ptr, size);
1142#else
1143 /* some systems, notably openbsd and darwin, fail to properly
1144 * implement realloc (x, 0) (as required by both ansi c-89 and
1145 * the single unix specification, so work around them here.
1146 */
1147
1148 if (size)
1149 return realloc (ptr, size);
1150
1151 free (ptr);
1152 return 0;
1153#endif
1154}
1155
183static void *(*alloc)(void *ptr, long size); 1156static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
184 1157
1158void ecb_cold
185void ev_set_allocator (void *(*cb)(void *ptr, long size)) 1159ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
186{ 1160{
187 alloc = cb; 1161 alloc = cb;
188} 1162}
189 1163
190static void * 1164inline_speed void *
191ev_realloc (void *ptr, long size) 1165ev_realloc (void *ptr, long size)
192{ 1166{
193 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1167 ptr = alloc (ptr, size);
194 1168
195 if (!ptr && size) 1169 if (!ptr && size)
196 { 1170 {
1171#if EV_AVOID_STDIO
1172 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1173#else
197 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1174 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1175#endif
198 abort (); 1176 abort ();
199 } 1177 }
200 1178
201 return ptr; 1179 return ptr;
202} 1180}
… …
204#define ev_malloc(size) ev_realloc (0, (size)) 1182#define ev_malloc(size) ev_realloc (0, (size))
205#define ev_free(ptr) ev_realloc ((ptr), 0) 1183#define ev_free(ptr) ev_realloc ((ptr), 0)
206 1184
207/*****************************************************************************/ 1185/*****************************************************************************/
208 1186
1187/* set in reify when reification needed */
1188#define EV_ANFD_REIFY 1
1189
1190/* file descriptor info structure */
209typedef struct 1191typedef struct
210{ 1192{
211 WL head; 1193 WL head;
212 unsigned char events; 1194 unsigned char events; /* the events watched for */
1195 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1196 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
213 unsigned char reify; 1197 unsigned char unused;
1198#if EV_USE_EPOLL
1199 unsigned int egen; /* generation counter to counter epoll bugs */
1200#endif
1201#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1202 SOCKET handle;
1203#endif
1204#if EV_USE_IOCP
1205 OVERLAPPED or, ow;
1206#endif
214} ANFD; 1207} ANFD;
215 1208
1209/* stores the pending event set for a given watcher */
216typedef struct 1210typedef struct
217{ 1211{
218 W w; 1212 W w;
219 int events; 1213 int events; /* the pending event set for the given watcher */
220} ANPENDING; 1214} ANPENDING;
1215
1216#if EV_USE_INOTIFY
1217/* hash table entry per inotify-id */
1218typedef struct
1219{
1220 WL head;
1221} ANFS;
1222#endif
1223
1224/* Heap Entry */
1225#if EV_HEAP_CACHE_AT
1226 /* a heap element */
1227 typedef struct {
1228 ev_tstamp at;
1229 WT w;
1230 } ANHE;
1231
1232 #define ANHE_w(he) (he).w /* access watcher, read-write */
1233 #define ANHE_at(he) (he).at /* access cached at, read-only */
1234 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1235#else
1236 /* a heap element */
1237 typedef WT ANHE;
1238
1239 #define ANHE_w(he) (he)
1240 #define ANHE_at(he) (he)->at
1241 #define ANHE_at_cache(he)
1242#endif
221 1243
222#if EV_MULTIPLICITY 1244#if EV_MULTIPLICITY
223 1245
224 struct ev_loop 1246 struct ev_loop
225 { 1247 {
1248 ev_tstamp ev_rt_now;
1249 #define ev_rt_now ((loop)->ev_rt_now)
226 #define VAR(name,decl) decl; 1250 #define VAR(name,decl) decl;
227 #include "ev_vars.h" 1251 #include "ev_vars.h"
228 #undef VAR 1252 #undef VAR
229 }; 1253 };
230 #include "ev_wrap.h" 1254 #include "ev_wrap.h"
231 1255
232 struct ev_loop default_loop_struct; 1256 static struct ev_loop default_loop_struct;
233 static struct ev_loop *default_loop; 1257 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
234 1258
235#else 1259#else
236 1260
1261 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
237 #define VAR(name,decl) static decl; 1262 #define VAR(name,decl) static decl;
238 #include "ev_vars.h" 1263 #include "ev_vars.h"
239 #undef VAR 1264 #undef VAR
240 1265
241 static int default_loop; 1266 static int ev_default_loop_ptr;
242 1267
243#endif 1268#endif
1269
1270#if EV_FEATURE_API
1271# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1272# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1273# define EV_INVOKE_PENDING invoke_cb (EV_A)
1274#else
1275# define EV_RELEASE_CB (void)0
1276# define EV_ACQUIRE_CB (void)0
1277# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1278#endif
1279
1280#define EVBREAK_RECURSE 0x80
244 1281
245/*****************************************************************************/ 1282/*****************************************************************************/
246 1283
247inline ev_tstamp 1284#ifndef EV_HAVE_EV_TIME
1285ev_tstamp
248ev_time (void) 1286ev_time (void) EV_THROW
249{ 1287{
250#if EV_USE_REALTIME 1288#if EV_USE_REALTIME
1289 if (expect_true (have_realtime))
1290 {
251 struct timespec ts; 1291 struct timespec ts;
252 clock_gettime (CLOCK_REALTIME, &ts); 1292 clock_gettime (CLOCK_REALTIME, &ts);
253 return ts.tv_sec + ts.tv_nsec * 1e-9; 1293 return ts.tv_sec + ts.tv_nsec * 1e-9;
254#else 1294 }
1295#endif
1296
255 struct timeval tv; 1297 struct timeval tv;
256 gettimeofday (&tv, 0); 1298 gettimeofday (&tv, 0);
257 return tv.tv_sec + tv.tv_usec * 1e-6; 1299 return tv.tv_sec + tv.tv_usec * 1e-6;
258#endif
259} 1300}
1301#endif
260 1302
261inline ev_tstamp 1303inline_size ev_tstamp
262get_clock (void) 1304get_clock (void)
263{ 1305{
264#if EV_USE_MONOTONIC 1306#if EV_USE_MONOTONIC
265 if (expect_true (have_monotonic)) 1307 if (expect_true (have_monotonic))
266 { 1308 {
… …
271#endif 1313#endif
272 1314
273 return ev_time (); 1315 return ev_time ();
274} 1316}
275 1317
1318#if EV_MULTIPLICITY
276ev_tstamp 1319ev_tstamp
277ev_now (EV_P) 1320ev_now (EV_P) EV_THROW
278{ 1321{
279 return rt_now; 1322 return ev_rt_now;
280} 1323}
1324#endif
281 1325
282#define array_roundsize(type,n) ((n) | 4 & ~3) 1326void
1327ev_sleep (ev_tstamp delay) EV_THROW
1328{
1329 if (delay > 0.)
1330 {
1331#if EV_USE_NANOSLEEP
1332 struct timespec ts;
1333
1334 EV_TS_SET (ts, delay);
1335 nanosleep (&ts, 0);
1336#elif defined _WIN32
1337 Sleep ((unsigned long)(delay * 1e3));
1338#else
1339 struct timeval tv;
1340
1341 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1342 /* something not guaranteed by newer posix versions, but guaranteed */
1343 /* by older ones */
1344 EV_TV_SET (tv, delay);
1345 select (0, 0, 0, 0, &tv);
1346#endif
1347 }
1348}
1349
1350/*****************************************************************************/
1351
1352#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1353
1354/* find a suitable new size for the given array, */
1355/* hopefully by rounding to a nice-to-malloc size */
1356inline_size int
1357array_nextsize (int elem, int cur, int cnt)
1358{
1359 int ncur = cur + 1;
1360
1361 do
1362 ncur <<= 1;
1363 while (cnt > ncur);
1364
1365 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1366 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1367 {
1368 ncur *= elem;
1369 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1370 ncur = ncur - sizeof (void *) * 4;
1371 ncur /= elem;
1372 }
1373
1374 return ncur;
1375}
1376
1377static void * noinline ecb_cold
1378array_realloc (int elem, void *base, int *cur, int cnt)
1379{
1380 *cur = array_nextsize (elem, *cur, cnt);
1381 return ev_realloc (base, elem * *cur);
1382}
1383
1384#define array_init_zero(base,count) \
1385 memset ((void *)(base), 0, sizeof (*(base)) * (count))
283 1386
284#define array_needsize(type,base,cur,cnt,init) \ 1387#define array_needsize(type,base,cur,cnt,init) \
285 if (expect_false ((cnt) > cur)) \ 1388 if (expect_false ((cnt) > (cur))) \
286 { \ 1389 { \
287 int newcnt = cur; \ 1390 int ecb_unused ocur_ = (cur); \
288 do \ 1391 (base) = (type *)array_realloc \
289 { \ 1392 (sizeof (type), (base), &(cur), (cnt)); \
290 newcnt = array_roundsize (type, newcnt << 1); \ 1393 init ((base) + (ocur_), (cur) - ocur_); \
291 } \
292 while ((cnt) > newcnt); \
293 \
294 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
295 init (base + cur, newcnt - cur); \
296 cur = newcnt; \
297 } 1394 }
298 1395
1396#if 0
299#define array_slim(type,stem) \ 1397#define array_slim(type,stem) \
300 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1398 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
301 { \ 1399 { \
302 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1400 stem ## max = array_roundsize (stem ## cnt >> 1); \
303 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1401 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
304 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1402 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
305 } 1403 }
306 1404#endif
307/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
308/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
309#define array_free_microshit(stem) \
310 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
311 1405
312#define array_free(stem, idx) \ 1406#define array_free(stem, idx) \
313 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1407 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
314 1408
315/*****************************************************************************/ 1409/*****************************************************************************/
316 1410
317static void 1411/* dummy callback for pending events */
318anfds_init (ANFD *base, int count) 1412static void noinline
1413pendingcb (EV_P_ ev_prepare *w, int revents)
319{ 1414{
320 while (count--)
321 {
322 base->head = 0;
323 base->events = EV_NONE;
324 base->reify = 0;
325
326 ++base;
327 }
328} 1415}
329 1416
330void 1417void noinline
331ev_feed_event (EV_P_ void *w, int revents) 1418ev_feed_event (EV_P_ void *w, int revents) EV_THROW
332{ 1419{
333 W w_ = (W)w; 1420 W w_ = (W)w;
1421 int pri = ABSPRI (w_);
334 1422
335 if (w_->pending) 1423 if (expect_false (w_->pending))
1424 pendings [pri][w_->pending - 1].events |= revents;
1425 else
336 { 1426 {
1427 w_->pending = ++pendingcnt [pri];
1428 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1429 pendings [pri][w_->pending - 1].w = w_;
337 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1430 pendings [pri][w_->pending - 1].events = revents;
338 return;
339 } 1431 }
340 1432
341 w_->pending = ++pendingcnt [ABSPRI (w_)]; 1433 pendingpri = NUMPRI - 1;
342 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
343 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
344 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
345} 1434}
346 1435
347static void 1436inline_speed void
1437feed_reverse (EV_P_ W w)
1438{
1439 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1440 rfeeds [rfeedcnt++] = w;
1441}
1442
1443inline_size void
1444feed_reverse_done (EV_P_ int revents)
1445{
1446 do
1447 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1448 while (rfeedcnt);
1449}
1450
1451inline_speed void
348queue_events (EV_P_ W *events, int eventcnt, int type) 1452queue_events (EV_P_ W *events, int eventcnt, int type)
349{ 1453{
350 int i; 1454 int i;
351 1455
352 for (i = 0; i < eventcnt; ++i) 1456 for (i = 0; i < eventcnt; ++i)
353 ev_feed_event (EV_A_ events [i], type); 1457 ev_feed_event (EV_A_ events [i], type);
354} 1458}
355 1459
1460/*****************************************************************************/
1461
356inline void 1462inline_speed void
357fd_event (EV_P_ int fd, int revents) 1463fd_event_nocheck (EV_P_ int fd, int revents)
358{ 1464{
359 ANFD *anfd = anfds + fd; 1465 ANFD *anfd = anfds + fd;
360 struct ev_io *w; 1466 ev_io *w;
361 1467
362 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 1468 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
363 { 1469 {
364 int ev = w->events & revents; 1470 int ev = w->events & revents;
365 1471
366 if (ev) 1472 if (ev)
367 ev_feed_event (EV_A_ (W)w, ev); 1473 ev_feed_event (EV_A_ (W)w, ev);
368 } 1474 }
369} 1475}
370 1476
1477/* do not submit kernel events for fds that have reify set */
1478/* because that means they changed while we were polling for new events */
1479inline_speed void
1480fd_event (EV_P_ int fd, int revents)
1481{
1482 ANFD *anfd = anfds + fd;
1483
1484 if (expect_true (!anfd->reify))
1485 fd_event_nocheck (EV_A_ fd, revents);
1486}
1487
371void 1488void
372ev_feed_fd_event (EV_P_ int fd, int revents) 1489ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
373{ 1490{
1491 if (fd >= 0 && fd < anfdmax)
374 fd_event (EV_A_ fd, revents); 1492 fd_event_nocheck (EV_A_ fd, revents);
375} 1493}
376 1494
377/*****************************************************************************/ 1495/* make sure the external fd watch events are in-sync */
378 1496/* with the kernel/libev internal state */
379static void 1497inline_size void
380fd_reify (EV_P) 1498fd_reify (EV_P)
381{ 1499{
382 int i; 1500 int i;
383 1501
1502#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
384 for (i = 0; i < fdchangecnt; ++i) 1503 for (i = 0; i < fdchangecnt; ++i)
385 { 1504 {
386 int fd = fdchanges [i]; 1505 int fd = fdchanges [i];
387 ANFD *anfd = anfds + fd; 1506 ANFD *anfd = anfds + fd;
1507
1508 if (anfd->reify & EV__IOFDSET && anfd->head)
1509 {
1510 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1511
1512 if (handle != anfd->handle)
1513 {
1514 unsigned long arg;
1515
1516 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1517
1518 /* handle changed, but fd didn't - we need to do it in two steps */
1519 backend_modify (EV_A_ fd, anfd->events, 0);
1520 anfd->events = 0;
1521 anfd->handle = handle;
1522 }
1523 }
1524 }
1525#endif
1526
1527 for (i = 0; i < fdchangecnt; ++i)
1528 {
1529 int fd = fdchanges [i];
1530 ANFD *anfd = anfds + fd;
388 struct ev_io *w; 1531 ev_io *w;
389 1532
390 int events = 0; 1533 unsigned char o_events = anfd->events;
1534 unsigned char o_reify = anfd->reify;
391 1535
392 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
393 events |= w->events;
394
395 anfd->reify = 0; 1536 anfd->reify = 0;
396 1537
397 method_modify (EV_A_ fd, anfd->events, events); 1538 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1539 {
398 anfd->events = events; 1540 anfd->events = 0;
1541
1542 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1543 anfd->events |= (unsigned char)w->events;
1544
1545 if (o_events != anfd->events)
1546 o_reify = EV__IOFDSET; /* actually |= */
1547 }
1548
1549 if (o_reify & EV__IOFDSET)
1550 backend_modify (EV_A_ fd, o_events, anfd->events);
399 } 1551 }
400 1552
401 fdchangecnt = 0; 1553 fdchangecnt = 0;
402} 1554}
403 1555
404static void 1556/* something about the given fd changed */
1557inline_size void
405fd_change (EV_P_ int fd) 1558fd_change (EV_P_ int fd, int flags)
406{ 1559{
407 if (anfds [fd].reify) 1560 unsigned char reify = anfds [fd].reify;
408 return;
409
410 anfds [fd].reify = 1; 1561 anfds [fd].reify |= flags;
411 1562
1563 if (expect_true (!reify))
1564 {
412 ++fdchangecnt; 1565 ++fdchangecnt;
413 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 1566 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
414 fdchanges [fdchangecnt - 1] = fd; 1567 fdchanges [fdchangecnt - 1] = fd;
1568 }
415} 1569}
416 1570
417static void 1571/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1572inline_speed void ecb_cold
418fd_kill (EV_P_ int fd) 1573fd_kill (EV_P_ int fd)
419{ 1574{
420 struct ev_io *w; 1575 ev_io *w;
421 1576
422 while ((w = (struct ev_io *)anfds [fd].head)) 1577 while ((w = (ev_io *)anfds [fd].head))
423 { 1578 {
424 ev_io_stop (EV_A_ w); 1579 ev_io_stop (EV_A_ w);
425 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1580 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
426 } 1581 }
427} 1582}
428 1583
429static int 1584/* check whether the given fd is actually valid, for error recovery */
1585inline_size int ecb_cold
430fd_valid (int fd) 1586fd_valid (int fd)
431{ 1587{
432#ifdef WIN32 1588#ifdef _WIN32
433 return !!win32_get_osfhandle (fd); 1589 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
434#else 1590#else
435 return fcntl (fd, F_GETFD) != -1; 1591 return fcntl (fd, F_GETFD) != -1;
436#endif 1592#endif
437} 1593}
438 1594
439/* called on EBADF to verify fds */ 1595/* called on EBADF to verify fds */
440static void 1596static void noinline ecb_cold
441fd_ebadf (EV_P) 1597fd_ebadf (EV_P)
442{ 1598{
443 int fd; 1599 int fd;
444 1600
445 for (fd = 0; fd < anfdmax; ++fd) 1601 for (fd = 0; fd < anfdmax; ++fd)
446 if (anfds [fd].events) 1602 if (anfds [fd].events)
447 if (!fd_valid (fd) == -1 && errno == EBADF) 1603 if (!fd_valid (fd) && errno == EBADF)
448 fd_kill (EV_A_ fd); 1604 fd_kill (EV_A_ fd);
449} 1605}
450 1606
451/* called on ENOMEM in select/poll to kill some fds and retry */ 1607/* called on ENOMEM in select/poll to kill some fds and retry */
452static void 1608static void noinline ecb_cold
453fd_enomem (EV_P) 1609fd_enomem (EV_P)
454{ 1610{
455 int fd; 1611 int fd;
456 1612
457 for (fd = anfdmax; fd--; ) 1613 for (fd = anfdmax; fd--; )
458 if (anfds [fd].events) 1614 if (anfds [fd].events)
459 { 1615 {
460 fd_kill (EV_A_ fd); 1616 fd_kill (EV_A_ fd);
461 return; 1617 break;
462 } 1618 }
463} 1619}
464 1620
465/* usually called after fork if method needs to re-arm all fds from scratch */ 1621/* usually called after fork if backend needs to re-arm all fds from scratch */
466static void 1622static void noinline
467fd_rearm_all (EV_P) 1623fd_rearm_all (EV_P)
468{ 1624{
469 int fd; 1625 int fd;
470 1626
471 /* this should be highly optimised to not do anything but set a flag */
472 for (fd = 0; fd < anfdmax; ++fd) 1627 for (fd = 0; fd < anfdmax; ++fd)
473 if (anfds [fd].events) 1628 if (anfds [fd].events)
474 { 1629 {
475 anfds [fd].events = 0; 1630 anfds [fd].events = 0;
476 fd_change (EV_A_ fd); 1631 anfds [fd].emask = 0;
1632 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
477 } 1633 }
478} 1634}
479 1635
1636/* used to prepare libev internal fd's */
1637/* this is not fork-safe */
1638inline_speed void
1639fd_intern (int fd)
1640{
1641#ifdef _WIN32
1642 unsigned long arg = 1;
1643 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1644#else
1645 fcntl (fd, F_SETFD, FD_CLOEXEC);
1646 fcntl (fd, F_SETFL, O_NONBLOCK);
1647#endif
1648}
1649
480/*****************************************************************************/ 1650/*****************************************************************************/
481 1651
1652/*
1653 * the heap functions want a real array index. array index 0 is guaranteed to not
1654 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1655 * the branching factor of the d-tree.
1656 */
1657
1658/*
1659 * at the moment we allow libev the luxury of two heaps,
1660 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1661 * which is more cache-efficient.
1662 * the difference is about 5% with 50000+ watchers.
1663 */
1664#if EV_USE_4HEAP
1665
1666#define DHEAP 4
1667#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1668#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1669#define UPHEAP_DONE(p,k) ((p) == (k))
1670
1671/* away from the root */
1672inline_speed void
1673downheap (ANHE *heap, int N, int k)
1674{
1675 ANHE he = heap [k];
1676 ANHE *E = heap + N + HEAP0;
1677
1678 for (;;)
1679 {
1680 ev_tstamp minat;
1681 ANHE *minpos;
1682 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1683
1684 /* find minimum child */
1685 if (expect_true (pos + DHEAP - 1 < E))
1686 {
1687 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1688 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1689 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1690 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1691 }
1692 else if (pos < E)
1693 {
1694 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1695 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1696 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1697 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1698 }
1699 else
1700 break;
1701
1702 if (ANHE_at (he) <= minat)
1703 break;
1704
1705 heap [k] = *minpos;
1706 ev_active (ANHE_w (*minpos)) = k;
1707
1708 k = minpos - heap;
1709 }
1710
1711 heap [k] = he;
1712 ev_active (ANHE_w (he)) = k;
1713}
1714
1715#else /* 4HEAP */
1716
1717#define HEAP0 1
1718#define HPARENT(k) ((k) >> 1)
1719#define UPHEAP_DONE(p,k) (!(p))
1720
1721/* away from the root */
1722inline_speed void
1723downheap (ANHE *heap, int N, int k)
1724{
1725 ANHE he = heap [k];
1726
1727 for (;;)
1728 {
1729 int c = k << 1;
1730
1731 if (c >= N + HEAP0)
1732 break;
1733
1734 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1735 ? 1 : 0;
1736
1737 if (ANHE_at (he) <= ANHE_at (heap [c]))
1738 break;
1739
1740 heap [k] = heap [c];
1741 ev_active (ANHE_w (heap [k])) = k;
1742
1743 k = c;
1744 }
1745
1746 heap [k] = he;
1747 ev_active (ANHE_w (he)) = k;
1748}
1749#endif
1750
1751/* towards the root */
1752inline_speed void
1753upheap (ANHE *heap, int k)
1754{
1755 ANHE he = heap [k];
1756
1757 for (;;)
1758 {
1759 int p = HPARENT (k);
1760
1761 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1762 break;
1763
1764 heap [k] = heap [p];
1765 ev_active (ANHE_w (heap [k])) = k;
1766 k = p;
1767 }
1768
1769 heap [k] = he;
1770 ev_active (ANHE_w (he)) = k;
1771}
1772
1773/* move an element suitably so it is in a correct place */
1774inline_size void
1775adjustheap (ANHE *heap, int N, int k)
1776{
1777 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1778 upheap (heap, k);
1779 else
1780 downheap (heap, N, k);
1781}
1782
1783/* rebuild the heap: this function is used only once and executed rarely */
1784inline_size void
1785reheap (ANHE *heap, int N)
1786{
1787 int i;
1788
1789 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1790 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1791 for (i = 0; i < N; ++i)
1792 upheap (heap, i + HEAP0);
1793}
1794
1795/*****************************************************************************/
1796
1797/* associate signal watchers to a signal signal */
1798typedef struct
1799{
1800 EV_ATOMIC_T pending;
1801#if EV_MULTIPLICITY
1802 EV_P;
1803#endif
1804 WL head;
1805} ANSIG;
1806
1807static ANSIG signals [EV_NSIG - 1];
1808
1809/*****************************************************************************/
1810
1811#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1812
1813static void noinline ecb_cold
1814evpipe_init (EV_P)
1815{
1816 if (!ev_is_active (&pipe_w))
1817 {
1818# if EV_USE_EVENTFD
1819 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1820 if (evfd < 0 && errno == EINVAL)
1821 evfd = eventfd (0, 0);
1822
1823 if (evfd >= 0)
1824 {
1825 evpipe [0] = -1;
1826 fd_intern (evfd); /* doing it twice doesn't hurt */
1827 ev_io_set (&pipe_w, evfd, EV_READ);
1828 }
1829 else
1830# endif
1831 {
1832 while (pipe (evpipe))
1833 ev_syserr ("(libev) error creating signal/async pipe");
1834
1835 fd_intern (evpipe [0]);
1836 fd_intern (evpipe [1]);
1837 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1838 }
1839
1840 ev_io_start (EV_A_ &pipe_w);
1841 ev_unref (EV_A); /* watcher should not keep loop alive */
1842 }
1843}
1844
1845inline_speed void
1846evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1847{
1848 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1849
1850 if (expect_true (*flag))
1851 return;
1852
1853 *flag = 1;
1854
1855 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1856
1857 pipe_write_skipped = 1;
1858
1859 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1860
1861 if (pipe_write_wanted)
1862 {
1863 int old_errno;
1864
1865 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1866
1867 old_errno = errno; /* save errno because write will clobber it */
1868
1869#if EV_USE_EVENTFD
1870 if (evfd >= 0)
1871 {
1872 uint64_t counter = 1;
1873 write (evfd, &counter, sizeof (uint64_t));
1874 }
1875 else
1876#endif
1877 {
1878#ifdef _WIN32
1879 WSABUF buf;
1880 DWORD sent;
1881 buf.buf = &buf;
1882 buf.len = 1;
1883 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1884#else
1885 write (evpipe [1], &(evpipe [1]), 1);
1886#endif
1887 }
1888
1889 errno = old_errno;
1890 }
1891}
1892
1893/* called whenever the libev signal pipe */
1894/* got some events (signal, async) */
482static void 1895static void
483upheap (WT *heap, int k) 1896pipecb (EV_P_ ev_io *iow, int revents)
484{ 1897{
485 WT w = heap [k]; 1898 int i;
486 1899
487 while (k && heap [k >> 1]->at > w->at) 1900 if (revents & EV_READ)
488 {
489 heap [k] = heap [k >> 1];
490 ((W)heap [k])->active = k + 1;
491 k >>= 1;
492 } 1901 {
1902#if EV_USE_EVENTFD
1903 if (evfd >= 0)
1904 {
1905 uint64_t counter;
1906 read (evfd, &counter, sizeof (uint64_t));
1907 }
1908 else
1909#endif
1910 {
1911 char dummy[4];
1912#ifdef _WIN32
1913 WSABUF buf;
1914 DWORD recvd;
1915 buf.buf = dummy;
1916 buf.len = sizeof (dummy);
1917 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, 0, 0, 0);
1918#else
1919 read (evpipe [0], &dummy, sizeof (dummy));
1920#endif
1921 }
1922 }
493 1923
494 heap [k] = w; 1924 pipe_write_skipped = 0;
495 ((W)heap [k])->active = k + 1;
496 1925
1926 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1927
1928#if EV_SIGNAL_ENABLE
1929 if (sig_pending)
1930 {
1931 sig_pending = 0;
1932
1933 ECB_MEMORY_FENCE_RELEASE;
1934
1935 for (i = EV_NSIG - 1; i--; )
1936 if (expect_false (signals [i].pending))
1937 ev_feed_signal_event (EV_A_ i + 1);
1938 }
1939#endif
1940
1941#if EV_ASYNC_ENABLE
1942 if (async_pending)
1943 {
1944 async_pending = 0;
1945
1946 ECB_MEMORY_FENCE_RELEASE;
1947
1948 for (i = asynccnt; i--; )
1949 if (asyncs [i]->sent)
1950 {
1951 asyncs [i]->sent = 0;
1952 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1953 }
1954 }
1955#endif
1956}
1957
1958/*****************************************************************************/
1959
1960void
1961ev_feed_signal (int signum) EV_THROW
1962{
1963#if EV_MULTIPLICITY
1964 EV_P = signals [signum - 1].loop;
1965
1966 if (!EV_A)
1967 return;
1968#endif
1969
1970 if (!ev_active (&pipe_w))
1971 return;
1972
1973 signals [signum - 1].pending = 1;
1974 evpipe_write (EV_A_ &sig_pending);
497} 1975}
498 1976
499static void 1977static void
500downheap (WT *heap, int N, int k)
501{
502 WT w = heap [k];
503
504 while (k < (N >> 1))
505 {
506 int j = k << 1;
507
508 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
509 ++j;
510
511 if (w->at <= heap [j]->at)
512 break;
513
514 heap [k] = heap [j];
515 ((W)heap [k])->active = k + 1;
516 k = j;
517 }
518
519 heap [k] = w;
520 ((W)heap [k])->active = k + 1;
521}
522
523inline void
524adjustheap (WT *heap, int N, int k, ev_tstamp at)
525{
526 ev_tstamp old_at = heap [k]->at;
527 heap [k]->at = at;
528
529 if (old_at < at)
530 downheap (heap, N, k);
531 else
532 upheap (heap, k);
533}
534
535/*****************************************************************************/
536
537typedef struct
538{
539 WL head;
540 sig_atomic_t volatile gotsig;
541} ANSIG;
542
543static ANSIG *signals;
544static int signalmax;
545
546static int sigpipe [2];
547static sig_atomic_t volatile gotsig;
548static struct ev_io sigev;
549
550static void
551signals_init (ANSIG *base, int count)
552{
553 while (count--)
554 {
555 base->head = 0;
556 base->gotsig = 0;
557
558 ++base;
559 }
560}
561
562static void
563sighandler (int signum) 1978ev_sighandler (int signum)
564{ 1979{
565#if WIN32
566 signal (signum, sighandler);
567#endif
568
569 signals [signum - 1].gotsig = 1;
570
571 if (!gotsig)
572 {
573 int old_errno = errno;
574 gotsig = 1;
575#ifdef WIN32 1980#ifdef _WIN32
576 send (sigpipe [1], &signum, 1, MSG_DONTWAIT); 1981 signal (signum, ev_sighandler);
577#else
578 write (sigpipe [1], &signum, 1);
579#endif 1982#endif
580 errno = old_errno;
581 }
582}
583 1983
584void 1984 ev_feed_signal (signum);
1985}
1986
1987void noinline
585ev_feed_signal_event (EV_P_ int signum) 1988ev_feed_signal_event (EV_P_ int signum) EV_THROW
586{ 1989{
587 WL w; 1990 WL w;
588 1991
1992 if (expect_false (signum <= 0 || signum > EV_NSIG))
1993 return;
1994
1995 --signum;
1996
589#if EV_MULTIPLICITY 1997#if EV_MULTIPLICITY
590 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1998 /* it is permissible to try to feed a signal to the wrong loop */
591#endif 1999 /* or, likely more useful, feeding a signal nobody is waiting for */
592 2000
593 --signum; 2001 if (expect_false (signals [signum].loop != EV_A))
594
595 if (signum < 0 || signum >= signalmax)
596 return; 2002 return;
2003#endif
597 2004
598 signals [signum].gotsig = 0; 2005 signals [signum].pending = 0;
599 2006
600 for (w = signals [signum].head; w; w = w->next) 2007 for (w = signals [signum].head; w; w = w->next)
601 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2008 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
602} 2009}
603 2010
2011#if EV_USE_SIGNALFD
604static void 2012static void
605sigcb (EV_P_ struct ev_io *iow, int revents) 2013sigfdcb (EV_P_ ev_io *iow, int revents)
606{ 2014{
607 int signum; 2015 struct signalfd_siginfo si[2], *sip; /* these structs are big */
608 2016
609#ifdef WIN32 2017 for (;;)
610 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 2018 {
611#else 2019 ssize_t res = read (sigfd, si, sizeof (si));
612 read (sigpipe [0], &revents, 1);
613#endif
614 gotsig = 0;
615 2020
616 for (signum = signalmax; signum--; ) 2021 /* not ISO-C, as res might be -1, but works with SuS */
617 if (signals [signum].gotsig) 2022 for (sip = si; (char *)sip < (char *)si + res; ++sip)
618 ev_feed_signal_event (EV_A_ signum + 1); 2023 ev_feed_signal_event (EV_A_ sip->ssi_signo);
619}
620 2024
621static void 2025 if (res < (ssize_t)sizeof (si))
622siginit (EV_P) 2026 break;
623{ 2027 }
624#ifndef WIN32
625 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
626 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
627
628 /* rather than sort out wether we really need nb, set it */
629 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
630 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
631#endif
632
633 ev_io_set (&sigev, sigpipe [0], EV_READ);
634 ev_io_start (EV_A_ &sigev);
635 ev_unref (EV_A); /* child watcher should not keep loop alive */
636} 2028}
2029#endif
2030
2031#endif
637 2032
638/*****************************************************************************/ 2033/*****************************************************************************/
639 2034
640static struct ev_child *childs [PID_HASHSIZE]; 2035#if EV_CHILD_ENABLE
2036static WL childs [EV_PID_HASHSIZE];
641 2037
642#ifndef WIN32
643
644static struct ev_signal childev; 2038static ev_signal childev;
2039
2040#ifndef WIFCONTINUED
2041# define WIFCONTINUED(status) 0
2042#endif
2043
2044/* handle a single child status event */
2045inline_speed void
2046child_reap (EV_P_ int chain, int pid, int status)
2047{
2048 ev_child *w;
2049 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2050
2051 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2052 {
2053 if ((w->pid == pid || !w->pid)
2054 && (!traced || (w->flags & 1)))
2055 {
2056 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2057 w->rpid = pid;
2058 w->rstatus = status;
2059 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2060 }
2061 }
2062}
645 2063
646#ifndef WCONTINUED 2064#ifndef WCONTINUED
647# define WCONTINUED 0 2065# define WCONTINUED 0
648#endif 2066#endif
649 2067
2068/* called on sigchld etc., calls waitpid */
650static void 2069static void
651child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
652{
653 struct ev_child *w;
654
655 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
656 if (w->pid == pid || !w->pid)
657 {
658 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
659 w->rpid = pid;
660 w->rstatus = status;
661 ev_feed_event (EV_A_ (W)w, EV_CHILD);
662 }
663}
664
665static void
666childcb (EV_P_ struct ev_signal *sw, int revents) 2070childcb (EV_P_ ev_signal *sw, int revents)
667{ 2071{
668 int pid, status; 2072 int pid, status;
669 2073
2074 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
670 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 2075 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
671 { 2076 if (!WCONTINUED
2077 || errno != EINVAL
2078 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2079 return;
2080
672 /* make sure we are called again until all childs have been reaped */ 2081 /* make sure we are called again until all children have been reaped */
2082 /* we need to do it this way so that the callback gets called before we continue */
673 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2083 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
674 2084
675 child_reap (EV_A_ sw, pid, pid, status); 2085 child_reap (EV_A_ pid, pid, status);
2086 if ((EV_PID_HASHSIZE) > 1)
676 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 2087 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
677 }
678} 2088}
679 2089
680#endif 2090#endif
681 2091
682/*****************************************************************************/ 2092/*****************************************************************************/
683 2093
2094#if EV_USE_IOCP
2095# include "ev_iocp.c"
2096#endif
2097#if EV_USE_PORT
2098# include "ev_port.c"
2099#endif
684#if EV_USE_KQUEUE 2100#if EV_USE_KQUEUE
685# include "ev_kqueue.c" 2101# include "ev_kqueue.c"
686#endif 2102#endif
687#if EV_USE_EPOLL 2103#if EV_USE_EPOLL
688# include "ev_epoll.c" 2104# include "ev_epoll.c"
… …
692#endif 2108#endif
693#if EV_USE_SELECT 2109#if EV_USE_SELECT
694# include "ev_select.c" 2110# include "ev_select.c"
695#endif 2111#endif
696 2112
697int 2113int ecb_cold
698ev_version_major (void) 2114ev_version_major (void) EV_THROW
699{ 2115{
700 return EV_VERSION_MAJOR; 2116 return EV_VERSION_MAJOR;
701} 2117}
702 2118
703int 2119int ecb_cold
704ev_version_minor (void) 2120ev_version_minor (void) EV_THROW
705{ 2121{
706 return EV_VERSION_MINOR; 2122 return EV_VERSION_MINOR;
707} 2123}
708 2124
709/* return true if we are running with elevated privileges and should ignore env variables */ 2125/* return true if we are running with elevated privileges and should ignore env variables */
710static int 2126int inline_size ecb_cold
711enable_secure (void) 2127enable_secure (void)
712{ 2128{
713#ifdef WIN32 2129#ifdef _WIN32
714 return 0; 2130 return 0;
715#else 2131#else
716 return getuid () != geteuid () 2132 return getuid () != geteuid ()
717 || getgid () != getegid (); 2133 || getgid () != getegid ();
718#endif 2134#endif
719} 2135}
720 2136
721int 2137unsigned int ecb_cold
722ev_method (EV_P) 2138ev_supported_backends (void) EV_THROW
723{ 2139{
724 return method; 2140 unsigned int flags = 0;
725}
726 2141
727static void 2142 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
728loop_init (EV_P_ int methods) 2143 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2144 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2145 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2146 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2147
2148 return flags;
2149}
2150
2151unsigned int ecb_cold
2152ev_recommended_backends (void) EV_THROW
729{ 2153{
730 if (!method) 2154 unsigned int flags = ev_supported_backends ();
2155
2156#ifndef __NetBSD__
2157 /* kqueue is borked on everything but netbsd apparently */
2158 /* it usually doesn't work correctly on anything but sockets and pipes */
2159 flags &= ~EVBACKEND_KQUEUE;
2160#endif
2161#ifdef __APPLE__
2162 /* only select works correctly on that "unix-certified" platform */
2163 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2164 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2165#endif
2166#ifdef __FreeBSD__
2167 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2168#endif
2169
2170 return flags;
2171}
2172
2173unsigned int ecb_cold
2174ev_embeddable_backends (void) EV_THROW
2175{
2176 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2177
2178 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2179 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2180 flags &= ~EVBACKEND_EPOLL;
2181
2182 return flags;
2183}
2184
2185unsigned int
2186ev_backend (EV_P) EV_THROW
2187{
2188 return backend;
2189}
2190
2191#if EV_FEATURE_API
2192unsigned int
2193ev_iteration (EV_P) EV_THROW
2194{
2195 return loop_count;
2196}
2197
2198unsigned int
2199ev_depth (EV_P) EV_THROW
2200{
2201 return loop_depth;
2202}
2203
2204void
2205ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2206{
2207 io_blocktime = interval;
2208}
2209
2210void
2211ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2212{
2213 timeout_blocktime = interval;
2214}
2215
2216void
2217ev_set_userdata (EV_P_ void *data) EV_THROW
2218{
2219 userdata = data;
2220}
2221
2222void *
2223ev_userdata (EV_P) EV_THROW
2224{
2225 return userdata;
2226}
2227
2228void
2229ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2230{
2231 invoke_cb = invoke_pending_cb;
2232}
2233
2234void
2235ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2236{
2237 release_cb = release;
2238 acquire_cb = acquire;
2239}
2240#endif
2241
2242/* initialise a loop structure, must be zero-initialised */
2243static void noinline ecb_cold
2244loop_init (EV_P_ unsigned int flags) EV_THROW
2245{
2246 if (!backend)
731 { 2247 {
2248 origflags = flags;
2249
2250#if EV_USE_REALTIME
2251 if (!have_realtime)
2252 {
2253 struct timespec ts;
2254
2255 if (!clock_gettime (CLOCK_REALTIME, &ts))
2256 have_realtime = 1;
2257 }
2258#endif
2259
732#if EV_USE_MONOTONIC 2260#if EV_USE_MONOTONIC
2261 if (!have_monotonic)
733 { 2262 {
734 struct timespec ts; 2263 struct timespec ts;
2264
735 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2265 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
736 have_monotonic = 1; 2266 have_monotonic = 1;
737 } 2267 }
738#endif 2268#endif
739 2269
2270 /* pid check not overridable via env */
2271#ifndef _WIN32
2272 if (flags & EVFLAG_FORKCHECK)
2273 curpid = getpid ();
2274#endif
2275
2276 if (!(flags & EVFLAG_NOENV)
2277 && !enable_secure ()
2278 && getenv ("LIBEV_FLAGS"))
2279 flags = atoi (getenv ("LIBEV_FLAGS"));
2280
740 rt_now = ev_time (); 2281 ev_rt_now = ev_time ();
741 mn_now = get_clock (); 2282 mn_now = get_clock ();
742 now_floor = mn_now; 2283 now_floor = mn_now;
743 rtmn_diff = rt_now - mn_now; 2284 rtmn_diff = ev_rt_now - mn_now;
2285#if EV_FEATURE_API
2286 invoke_cb = ev_invoke_pending;
2287#endif
744 2288
745 if (methods == EVMETHOD_AUTO) 2289 io_blocktime = 0.;
746 if (!enable_secure () && getenv ("LIBEV_METHODS")) 2290 timeout_blocktime = 0.;
747 methods = atoi (getenv ("LIBEV_METHODS")); 2291 backend = 0;
748 else 2292 backend_fd = -1;
749 methods = EVMETHOD_ANY; 2293 sig_pending = 0;
2294#if EV_ASYNC_ENABLE
2295 async_pending = 0;
2296#endif
2297 pipe_write_skipped = 0;
2298 pipe_write_wanted = 0;
2299#if EV_USE_INOTIFY
2300 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2301#endif
2302#if EV_USE_SIGNALFD
2303 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2304#endif
750 2305
751 method = 0; 2306 if (!(flags & EVBACKEND_MASK))
2307 flags |= ev_recommended_backends ();
2308
752#if EV_USE_WIN32 2309#if EV_USE_IOCP
753 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 2310 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2311#endif
2312#if EV_USE_PORT
2313 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
754#endif 2314#endif
755#if EV_USE_KQUEUE 2315#if EV_USE_KQUEUE
756 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 2316 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
757#endif 2317#endif
758#if EV_USE_EPOLL 2318#if EV_USE_EPOLL
759 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 2319 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
760#endif 2320#endif
761#if EV_USE_POLL 2321#if EV_USE_POLL
762 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 2322 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
763#endif 2323#endif
764#if EV_USE_SELECT 2324#if EV_USE_SELECT
765 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 2325 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
766#endif 2326#endif
767 2327
2328 ev_prepare_init (&pending_w, pendingcb);
2329
2330#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
768 ev_init (&sigev, sigcb); 2331 ev_init (&pipe_w, pipecb);
769 ev_set_priority (&sigev, EV_MAXPRI); 2332 ev_set_priority (&pipe_w, EV_MAXPRI);
2333#endif
770 } 2334 }
771} 2335}
772 2336
773void 2337/* free up a loop structure */
2338void ecb_cold
774loop_destroy (EV_P) 2339ev_loop_destroy (EV_P)
775{ 2340{
776 int i; 2341 int i;
777 2342
2343#if EV_MULTIPLICITY
2344 /* mimic free (0) */
2345 if (!EV_A)
2346 return;
2347#endif
2348
2349#if EV_CLEANUP_ENABLE
2350 /* queue cleanup watchers (and execute them) */
2351 if (expect_false (cleanupcnt))
2352 {
2353 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2354 EV_INVOKE_PENDING;
2355 }
2356#endif
2357
2358#if EV_CHILD_ENABLE
2359 if (ev_is_active (&childev))
2360 {
2361 ev_ref (EV_A); /* child watcher */
2362 ev_signal_stop (EV_A_ &childev);
2363 }
2364#endif
2365
2366 if (ev_is_active (&pipe_w))
2367 {
2368 /*ev_ref (EV_A);*/
2369 /*ev_io_stop (EV_A_ &pipe_w);*/
2370
2371#if EV_USE_EVENTFD
2372 if (evfd >= 0)
2373 close (evfd);
2374#endif
2375
2376 if (evpipe [0] >= 0)
2377 {
2378 EV_WIN32_CLOSE_FD (evpipe [0]);
2379 EV_WIN32_CLOSE_FD (evpipe [1]);
2380 }
2381 }
2382
2383#if EV_USE_SIGNALFD
2384 if (ev_is_active (&sigfd_w))
2385 close (sigfd);
2386#endif
2387
2388#if EV_USE_INOTIFY
2389 if (fs_fd >= 0)
2390 close (fs_fd);
2391#endif
2392
2393 if (backend_fd >= 0)
2394 close (backend_fd);
2395
778#if EV_USE_WIN32 2396#if EV_USE_IOCP
779 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 2397 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2398#endif
2399#if EV_USE_PORT
2400 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
780#endif 2401#endif
781#if EV_USE_KQUEUE 2402#if EV_USE_KQUEUE
782 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 2403 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
783#endif 2404#endif
784#if EV_USE_EPOLL 2405#if EV_USE_EPOLL
785 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 2406 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
786#endif 2407#endif
787#if EV_USE_POLL 2408#if EV_USE_POLL
788 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 2409 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
789#endif 2410#endif
790#if EV_USE_SELECT 2411#if EV_USE_SELECT
791 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 2412 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
792#endif 2413#endif
793 2414
794 for (i = NUMPRI; i--; ) 2415 for (i = NUMPRI; i--; )
2416 {
795 array_free (pending, [i]); 2417 array_free (pending, [i]);
2418#if EV_IDLE_ENABLE
2419 array_free (idle, [i]);
2420#endif
2421 }
2422
2423 ev_free (anfds); anfds = 0; anfdmax = 0;
796 2424
797 /* have to use the microsoft-never-gets-it-right macro */ 2425 /* have to use the microsoft-never-gets-it-right macro */
798 array_free_microshit (fdchange); 2426 array_free (rfeed, EMPTY);
799 array_free_microshit (timer); 2427 array_free (fdchange, EMPTY);
800 array_free_microshit (periodic); 2428 array_free (timer, EMPTY);
801 array_free_microshit (idle); 2429#if EV_PERIODIC_ENABLE
802 array_free_microshit (prepare); 2430 array_free (periodic, EMPTY);
803 array_free_microshit (check); 2431#endif
2432#if EV_FORK_ENABLE
2433 array_free (fork, EMPTY);
2434#endif
2435#if EV_CLEANUP_ENABLE
2436 array_free (cleanup, EMPTY);
2437#endif
2438 array_free (prepare, EMPTY);
2439 array_free (check, EMPTY);
2440#if EV_ASYNC_ENABLE
2441 array_free (async, EMPTY);
2442#endif
804 2443
805 method = 0; 2444 backend = 0;
806}
807 2445
808static void 2446#if EV_MULTIPLICITY
2447 if (ev_is_default_loop (EV_A))
2448#endif
2449 ev_default_loop_ptr = 0;
2450#if EV_MULTIPLICITY
2451 else
2452 ev_free (EV_A);
2453#endif
2454}
2455
2456#if EV_USE_INOTIFY
2457inline_size void infy_fork (EV_P);
2458#endif
2459
2460inline_size void
809loop_fork (EV_P) 2461loop_fork (EV_P)
810{ 2462{
2463#if EV_USE_PORT
2464 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2465#endif
2466#if EV_USE_KQUEUE
2467 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2468#endif
811#if EV_USE_EPOLL 2469#if EV_USE_EPOLL
812 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 2470 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
813#endif 2471#endif
814#if EV_USE_KQUEUE 2472#if EV_USE_INOTIFY
815 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 2473 infy_fork (EV_A);
816#endif 2474#endif
817 2475
818 if (ev_is_active (&sigev)) 2476 if (ev_is_active (&pipe_w))
819 { 2477 {
820 /* default loop */ 2478 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
821 2479
822 ev_ref (EV_A); 2480 ev_ref (EV_A);
823 ev_io_stop (EV_A_ &sigev); 2481 ev_io_stop (EV_A_ &pipe_w);
824 close (sigpipe [0]);
825 close (sigpipe [1]);
826 2482
827 while (pipe (sigpipe)) 2483#if EV_USE_EVENTFD
828 syserr ("(libev) error creating pipe"); 2484 if (evfd >= 0)
2485 close (evfd);
2486#endif
829 2487
2488 if (evpipe [0] >= 0)
2489 {
2490 EV_WIN32_CLOSE_FD (evpipe [0]);
2491 EV_WIN32_CLOSE_FD (evpipe [1]);
2492 }
2493
2494#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
830 siginit (EV_A); 2495 evpipe_init (EV_A);
2496 /* now iterate over everything, in case we missed something */
2497 pipecb (EV_A_ &pipe_w, EV_READ);
2498#endif
831 } 2499 }
832 2500
833 postfork = 0; 2501 postfork = 0;
834} 2502}
835 2503
836#if EV_MULTIPLICITY 2504#if EV_MULTIPLICITY
2505
837struct ev_loop * 2506struct ev_loop * ecb_cold
838ev_loop_new (int methods) 2507ev_loop_new (unsigned int flags) EV_THROW
839{ 2508{
840 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2509 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
841 2510
842 memset (loop, 0, sizeof (struct ev_loop)); 2511 memset (EV_A, 0, sizeof (struct ev_loop));
843
844 loop_init (EV_A_ methods); 2512 loop_init (EV_A_ flags);
845 2513
846 if (ev_method (EV_A)) 2514 if (ev_backend (EV_A))
847 return loop; 2515 return EV_A;
848 2516
2517 ev_free (EV_A);
849 return 0; 2518 return 0;
850} 2519}
851 2520
852void 2521#endif /* multiplicity */
853ev_loop_destroy (EV_P)
854{
855 loop_destroy (EV_A);
856 ev_free (loop);
857}
858 2522
859void 2523#if EV_VERIFY
860ev_loop_fork (EV_P) 2524static void noinline ecb_cold
2525verify_watcher (EV_P_ W w)
861{ 2526{
862 postfork = 1; 2527 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
863}
864 2528
2529 if (w->pending)
2530 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2531}
2532
2533static void noinline ecb_cold
2534verify_heap (EV_P_ ANHE *heap, int N)
2535{
2536 int i;
2537
2538 for (i = HEAP0; i < N + HEAP0; ++i)
2539 {
2540 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2541 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2542 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2543
2544 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2545 }
2546}
2547
2548static void noinline ecb_cold
2549array_verify (EV_P_ W *ws, int cnt)
2550{
2551 while (cnt--)
2552 {
2553 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2554 verify_watcher (EV_A_ ws [cnt]);
2555 }
2556}
2557#endif
2558
2559#if EV_FEATURE_API
2560void ecb_cold
2561ev_verify (EV_P) EV_THROW
2562{
2563#if EV_VERIFY
2564 int i;
2565 WL w, w2;
2566
2567 assert (activecnt >= -1);
2568
2569 assert (fdchangemax >= fdchangecnt);
2570 for (i = 0; i < fdchangecnt; ++i)
2571 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2572
2573 assert (anfdmax >= 0);
2574 for (i = 0; i < anfdmax; ++i)
2575 {
2576 int j = 0;
2577
2578 for (w = w2 = anfds [i].head; w; w = w->next)
2579 {
2580 verify_watcher (EV_A_ (W)w);
2581
2582 if (j++ & 1)
2583 {
2584 assert (("libev: io watcher list contains a loop", w != w2));
2585 w2 = w2->next;
2586 }
2587
2588 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2589 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2590 }
2591 }
2592
2593 assert (timermax >= timercnt);
2594 verify_heap (EV_A_ timers, timercnt);
2595
2596#if EV_PERIODIC_ENABLE
2597 assert (periodicmax >= periodiccnt);
2598 verify_heap (EV_A_ periodics, periodiccnt);
2599#endif
2600
2601 for (i = NUMPRI; i--; )
2602 {
2603 assert (pendingmax [i] >= pendingcnt [i]);
2604#if EV_IDLE_ENABLE
2605 assert (idleall >= 0);
2606 assert (idlemax [i] >= idlecnt [i]);
2607 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2608#endif
2609 }
2610
2611#if EV_FORK_ENABLE
2612 assert (forkmax >= forkcnt);
2613 array_verify (EV_A_ (W *)forks, forkcnt);
2614#endif
2615
2616#if EV_CLEANUP_ENABLE
2617 assert (cleanupmax >= cleanupcnt);
2618 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2619#endif
2620
2621#if EV_ASYNC_ENABLE
2622 assert (asyncmax >= asynccnt);
2623 array_verify (EV_A_ (W *)asyncs, asynccnt);
2624#endif
2625
2626#if EV_PREPARE_ENABLE
2627 assert (preparemax >= preparecnt);
2628 array_verify (EV_A_ (W *)prepares, preparecnt);
2629#endif
2630
2631#if EV_CHECK_ENABLE
2632 assert (checkmax >= checkcnt);
2633 array_verify (EV_A_ (W *)checks, checkcnt);
2634#endif
2635
2636# if 0
2637#if EV_CHILD_ENABLE
2638 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2639 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2640#endif
2641# endif
2642#endif
2643}
865#endif 2644#endif
866 2645
867#if EV_MULTIPLICITY 2646#if EV_MULTIPLICITY
868struct ev_loop * 2647struct ev_loop * ecb_cold
869#else 2648#else
870int 2649int
871#endif 2650#endif
872ev_default_loop (int methods) 2651ev_default_loop (unsigned int flags) EV_THROW
873{ 2652{
874 if (sigpipe [0] == sigpipe [1])
875 if (pipe (sigpipe))
876 return 0;
877
878 if (!default_loop) 2653 if (!ev_default_loop_ptr)
879 { 2654 {
880#if EV_MULTIPLICITY 2655#if EV_MULTIPLICITY
881 struct ev_loop *loop = default_loop = &default_loop_struct; 2656 EV_P = ev_default_loop_ptr = &default_loop_struct;
882#else 2657#else
883 default_loop = 1; 2658 ev_default_loop_ptr = 1;
884#endif 2659#endif
885 2660
886 loop_init (EV_A_ methods); 2661 loop_init (EV_A_ flags);
887 2662
888 if (ev_method (EV_A)) 2663 if (ev_backend (EV_A))
889 { 2664 {
890 siginit (EV_A); 2665#if EV_CHILD_ENABLE
891
892#ifndef WIN32
893 ev_signal_init (&childev, childcb, SIGCHLD); 2666 ev_signal_init (&childev, childcb, SIGCHLD);
894 ev_set_priority (&childev, EV_MAXPRI); 2667 ev_set_priority (&childev, EV_MAXPRI);
895 ev_signal_start (EV_A_ &childev); 2668 ev_signal_start (EV_A_ &childev);
896 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2669 ev_unref (EV_A); /* child watcher should not keep loop alive */
897#endif 2670#endif
898 } 2671 }
899 else 2672 else
900 default_loop = 0; 2673 ev_default_loop_ptr = 0;
901 } 2674 }
902 2675
903 return default_loop; 2676 return ev_default_loop_ptr;
904} 2677}
905 2678
906void 2679void
907ev_default_destroy (void) 2680ev_loop_fork (EV_P) EV_THROW
908{ 2681{
909#if EV_MULTIPLICITY 2682 postfork = 1; /* must be in line with ev_default_fork */
910 struct ev_loop *loop = default_loop;
911#endif
912
913#ifndef WIN32
914 ev_ref (EV_A); /* child watcher */
915 ev_signal_stop (EV_A_ &childev);
916#endif
917
918 ev_ref (EV_A); /* signal watcher */
919 ev_io_stop (EV_A_ &sigev);
920
921 close (sigpipe [0]); sigpipe [0] = 0;
922 close (sigpipe [1]); sigpipe [1] = 0;
923
924 loop_destroy (EV_A);
925} 2683}
2684
2685/*****************************************************************************/
926 2686
927void 2687void
928ev_default_fork (void) 2688ev_invoke (EV_P_ void *w, int revents)
929{ 2689{
930#if EV_MULTIPLICITY 2690 EV_CB_INVOKE ((W)w, revents);
931 struct ev_loop *loop = default_loop;
932#endif
933
934 if (method)
935 postfork = 1;
936} 2691}
937 2692
938/*****************************************************************************/ 2693unsigned int
939 2694ev_pending_count (EV_P) EV_THROW
940static int
941any_pending (EV_P)
942{ 2695{
943 int pri; 2696 int pri;
2697 unsigned int count = 0;
944 2698
945 for (pri = NUMPRI; pri--; ) 2699 for (pri = NUMPRI; pri--; )
946 if (pendingcnt [pri]) 2700 count += pendingcnt [pri];
947 return 1;
948 2701
949 return 0; 2702 return count;
950} 2703}
951 2704
952static void 2705void noinline
953call_pending (EV_P) 2706ev_invoke_pending (EV_P)
954{ 2707{
955 int pri; 2708 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
956
957 for (pri = NUMPRI; pri--; )
958 while (pendingcnt [pri]) 2709 while (pendingcnt [pendingpri])
959 { 2710 {
960 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2711 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
961 2712
962 if (p->w)
963 {
964 p->w->pending = 0; 2713 p->w->pending = 0;
965 EV_CB_INVOKE (p->w, p->events); 2714 EV_CB_INVOKE (p->w, p->events);
966 } 2715 EV_FREQUENT_CHECK;
967 } 2716 }
968} 2717}
969 2718
970static void 2719#if EV_IDLE_ENABLE
2720/* make idle watchers pending. this handles the "call-idle */
2721/* only when higher priorities are idle" logic */
2722inline_size void
2723idle_reify (EV_P)
2724{
2725 if (expect_false (idleall))
2726 {
2727 int pri;
2728
2729 for (pri = NUMPRI; pri--; )
2730 {
2731 if (pendingcnt [pri])
2732 break;
2733
2734 if (idlecnt [pri])
2735 {
2736 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2737 break;
2738 }
2739 }
2740 }
2741}
2742#endif
2743
2744/* make timers pending */
2745inline_size void
971timers_reify (EV_P) 2746timers_reify (EV_P)
972{ 2747{
2748 EV_FREQUENT_CHECK;
2749
973 while (timercnt && ((WT)timers [0])->at <= mn_now) 2750 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
974 { 2751 {
975 struct ev_timer *w = timers [0]; 2752 do
976
977 assert (("inactive timer on timer heap detected", ev_is_active (w)));
978
979 /* first reschedule or stop timer */
980 if (w->repeat)
981 { 2753 {
2754 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2755
2756 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2757
2758 /* first reschedule or stop timer */
2759 if (w->repeat)
2760 {
2761 ev_at (w) += w->repeat;
2762 if (ev_at (w) < mn_now)
2763 ev_at (w) = mn_now;
2764
982 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2765 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
983 ((WT)w)->at = mn_now + w->repeat; 2766
2767 ANHE_at_cache (timers [HEAP0]);
984 downheap ((WT *)timers, timercnt, 0); 2768 downheap (timers, timercnt, HEAP0);
2769 }
2770 else
2771 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2772
2773 EV_FREQUENT_CHECK;
2774 feed_reverse (EV_A_ (W)w);
985 } 2775 }
986 else 2776 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
987 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
988 2777
989 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2778 feed_reverse_done (EV_A_ EV_TIMER);
2779 }
2780}
2781
2782#if EV_PERIODIC_ENABLE
2783
2784static void noinline
2785periodic_recalc (EV_P_ ev_periodic *w)
2786{
2787 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2788 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2789
2790 /* the above almost always errs on the low side */
2791 while (at <= ev_rt_now)
990 } 2792 {
991} 2793 ev_tstamp nat = at + w->interval;
992 2794
993static void 2795 /* when resolution fails us, we use ev_rt_now */
2796 if (expect_false (nat == at))
2797 {
2798 at = ev_rt_now;
2799 break;
2800 }
2801
2802 at = nat;
2803 }
2804
2805 ev_at (w) = at;
2806}
2807
2808/* make periodics pending */
2809inline_size void
994periodics_reify (EV_P) 2810periodics_reify (EV_P)
995{ 2811{
2812 EV_FREQUENT_CHECK;
2813
996 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 2814 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
997 { 2815 {
998 struct ev_periodic *w = periodics [0]; 2816 int feed_count = 0;
999 2817
2818 do
2819 {
2820 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2821
1000 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2822 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1001 2823
1002 /* first reschedule or stop timer */ 2824 /* first reschedule or stop timer */
2825 if (w->reschedule_cb)
2826 {
2827 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2828
2829 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2830
2831 ANHE_at_cache (periodics [HEAP0]);
2832 downheap (periodics, periodiccnt, HEAP0);
2833 }
2834 else if (w->interval)
2835 {
2836 periodic_recalc (EV_A_ w);
2837 ANHE_at_cache (periodics [HEAP0]);
2838 downheap (periodics, periodiccnt, HEAP0);
2839 }
2840 else
2841 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2842
2843 EV_FREQUENT_CHECK;
2844 feed_reverse (EV_A_ (W)w);
2845 }
2846 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2847
2848 feed_reverse_done (EV_A_ EV_PERIODIC);
2849 }
2850}
2851
2852/* simply recalculate all periodics */
2853/* TODO: maybe ensure that at least one event happens when jumping forward? */
2854static void noinline ecb_cold
2855periodics_reschedule (EV_P)
2856{
2857 int i;
2858
2859 /* adjust periodics after time jump */
2860 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2861 {
2862 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2863
1003 if (w->reschedule_cb) 2864 if (w->reschedule_cb)
1004 {
1005 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); 2865 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1006
1007 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
1008 downheap ((WT *)periodics, periodiccnt, 0);
1009 }
1010 else if (w->interval) 2866 else if (w->interval)
1011 { 2867 periodic_recalc (EV_A_ w);
1012 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1013 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
1014 downheap ((WT *)periodics, periodiccnt, 0);
1015 }
1016 else
1017 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1018 2868
1019 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2869 ANHE_at_cache (periodics [i]);
1020 } 2870 }
1021}
1022 2871
1023static void 2872 reheap (periodics, periodiccnt);
1024periodics_reschedule (EV_P) 2873}
2874#endif
2875
2876/* adjust all timers by a given offset */
2877static void noinline ecb_cold
2878timers_reschedule (EV_P_ ev_tstamp adjust)
1025{ 2879{
1026 int i; 2880 int i;
1027 2881
1028 /* adjust periodics after time jump */
1029 for (i = 0; i < periodiccnt; ++i) 2882 for (i = 0; i < timercnt; ++i)
1030 {
1031 struct ev_periodic *w = periodics [i];
1032
1033 if (w->reschedule_cb)
1034 ((WT)w)->at = w->reschedule_cb (w, rt_now);
1035 else if (w->interval)
1036 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1037 } 2883 {
1038 2884 ANHE *he = timers + i + HEAP0;
1039 /* now rebuild the heap */ 2885 ANHE_w (*he)->at += adjust;
1040 for (i = periodiccnt >> 1; i--; ) 2886 ANHE_at_cache (*he);
1041 downheap ((WT *)periodics, periodiccnt, i);
1042}
1043
1044inline int
1045time_update_monotonic (EV_P)
1046{
1047 mn_now = get_clock ();
1048
1049 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1050 { 2887 }
1051 rt_now = rtmn_diff + mn_now;
1052 return 0;
1053 }
1054 else
1055 {
1056 now_floor = mn_now;
1057 rt_now = ev_time ();
1058 return 1;
1059 }
1060} 2888}
1061 2889
1062static void 2890/* fetch new monotonic and realtime times from the kernel */
1063time_update (EV_P) 2891/* also detect if there was a timejump, and act accordingly */
2892inline_speed void
2893time_update (EV_P_ ev_tstamp max_block)
1064{ 2894{
1065 int i;
1066
1067#if EV_USE_MONOTONIC 2895#if EV_USE_MONOTONIC
1068 if (expect_true (have_monotonic)) 2896 if (expect_true (have_monotonic))
1069 { 2897 {
1070 if (time_update_monotonic (EV_A)) 2898 int i;
2899 ev_tstamp odiff = rtmn_diff;
2900
2901 mn_now = get_clock ();
2902
2903 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2904 /* interpolate in the meantime */
2905 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1071 { 2906 {
1072 ev_tstamp odiff = rtmn_diff; 2907 ev_rt_now = rtmn_diff + mn_now;
2908 return;
2909 }
1073 2910
2911 now_floor = mn_now;
2912 ev_rt_now = ev_time ();
2913
1074 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 2914 /* loop a few times, before making important decisions.
2915 * on the choice of "4": one iteration isn't enough,
2916 * in case we get preempted during the calls to
2917 * ev_time and get_clock. a second call is almost guaranteed
2918 * to succeed in that case, though. and looping a few more times
2919 * doesn't hurt either as we only do this on time-jumps or
2920 * in the unlikely event of having been preempted here.
2921 */
2922 for (i = 4; --i; )
1075 { 2923 {
2924 ev_tstamp diff;
1076 rtmn_diff = rt_now - mn_now; 2925 rtmn_diff = ev_rt_now - mn_now;
1077 2926
1078 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2927 diff = odiff - rtmn_diff;
2928
2929 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1079 return; /* all is well */ 2930 return; /* all is well */
1080 2931
1081 rt_now = ev_time (); 2932 ev_rt_now = ev_time ();
1082 mn_now = get_clock (); 2933 mn_now = get_clock ();
1083 now_floor = mn_now; 2934 now_floor = mn_now;
1084 } 2935 }
1085 2936
2937 /* no timer adjustment, as the monotonic clock doesn't jump */
2938 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2939# if EV_PERIODIC_ENABLE
2940 periodics_reschedule (EV_A);
2941# endif
2942 }
2943 else
2944#endif
2945 {
2946 ev_rt_now = ev_time ();
2947
2948 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2949 {
2950 /* adjust timers. this is easy, as the offset is the same for all of them */
2951 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2952#if EV_PERIODIC_ENABLE
1086 periodics_reschedule (EV_A); 2953 periodics_reschedule (EV_A);
1087 /* no timer adjustment, as the monotonic clock doesn't jump */ 2954#endif
1088 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1089 } 2955 }
1090 }
1091 else
1092#endif
1093 {
1094 rt_now = ev_time ();
1095 2956
1096 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1097 {
1098 periodics_reschedule (EV_A);
1099
1100 /* adjust timers. this is easy, as the offset is the same for all */
1101 for (i = 0; i < timercnt; ++i)
1102 ((WT)timers [i])->at += rt_now - mn_now;
1103 }
1104
1105 mn_now = rt_now; 2957 mn_now = ev_rt_now;
1106 } 2958 }
1107} 2959}
1108 2960
1109void 2961int
1110ev_ref (EV_P)
1111{
1112 ++activecnt;
1113}
1114
1115void
1116ev_unref (EV_P)
1117{
1118 --activecnt;
1119}
1120
1121static int loop_done;
1122
1123void
1124ev_loop (EV_P_ int flags) 2962ev_run (EV_P_ int flags)
1125{ 2963{
1126 double block; 2964#if EV_FEATURE_API
1127 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2965 ++loop_depth;
2966#endif
2967
2968 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2969
2970 loop_done = EVBREAK_CANCEL;
2971
2972 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1128 2973
1129 do 2974 do
1130 { 2975 {
2976#if EV_VERIFY >= 2
2977 ev_verify (EV_A);
2978#endif
2979
2980#ifndef _WIN32
2981 if (expect_false (curpid)) /* penalise the forking check even more */
2982 if (expect_false (getpid () != curpid))
2983 {
2984 curpid = getpid ();
2985 postfork = 1;
2986 }
2987#endif
2988
2989#if EV_FORK_ENABLE
2990 /* we might have forked, so queue fork handlers */
2991 if (expect_false (postfork))
2992 if (forkcnt)
2993 {
2994 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2995 EV_INVOKE_PENDING;
2996 }
2997#endif
2998
2999#if EV_PREPARE_ENABLE
1131 /* queue check watchers (and execute them) */ 3000 /* queue prepare watchers (and execute them) */
1132 if (expect_false (preparecnt)) 3001 if (expect_false (preparecnt))
1133 { 3002 {
1134 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3003 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1135 call_pending (EV_A); 3004 EV_INVOKE_PENDING;
1136 } 3005 }
3006#endif
3007
3008 if (expect_false (loop_done))
3009 break;
1137 3010
1138 /* we might have forked, so reify kernel state if necessary */ 3011 /* we might have forked, so reify kernel state if necessary */
1139 if (expect_false (postfork)) 3012 if (expect_false (postfork))
1140 loop_fork (EV_A); 3013 loop_fork (EV_A);
1141 3014
1142 /* update fd-related kernel structures */ 3015 /* update fd-related kernel structures */
1143 fd_reify (EV_A); 3016 fd_reify (EV_A);
1144 3017
1145 /* calculate blocking time */ 3018 /* calculate blocking time */
3019 {
3020 ev_tstamp waittime = 0.;
3021 ev_tstamp sleeptime = 0.;
1146 3022
1147 /* we only need this for !monotonic clock or timers, but as we basically 3023 /* remember old timestamp for io_blocktime calculation */
1148 always have timers, we just calculate it always */ 3024 ev_tstamp prev_mn_now = mn_now;
1149#if EV_USE_MONOTONIC 3025
1150 if (expect_true (have_monotonic)) 3026 /* update time to cancel out callback processing overhead */
1151 time_update_monotonic (EV_A); 3027 time_update (EV_A_ 1e100);
1152 else 3028
1153#endif 3029 /* from now on, we want a pipe-wake-up */
3030 pipe_write_wanted = 1;
3031
3032 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3033
3034 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1154 { 3035 {
1155 rt_now = ev_time ();
1156 mn_now = rt_now;
1157 }
1158
1159 if (flags & EVLOOP_NONBLOCK || idlecnt)
1160 block = 0.;
1161 else
1162 {
1163 block = MAX_BLOCKTIME; 3036 waittime = MAX_BLOCKTIME;
1164 3037
1165 if (timercnt) 3038 if (timercnt)
1166 { 3039 {
1167 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 3040 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1168 if (block > to) block = to; 3041 if (waittime > to) waittime = to;
1169 } 3042 }
1170 3043
3044#if EV_PERIODIC_ENABLE
1171 if (periodiccnt) 3045 if (periodiccnt)
1172 { 3046 {
1173 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 3047 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1174 if (block > to) block = to; 3048 if (waittime > to) waittime = to;
1175 } 3049 }
3050#endif
1176 3051
1177 if (block < 0.) block = 0.; 3052 /* don't let timeouts decrease the waittime below timeout_blocktime */
3053 if (expect_false (waittime < timeout_blocktime))
3054 waittime = timeout_blocktime;
3055
3056 /* at this point, we NEED to wait, so we have to ensure */
3057 /* to pass a minimum nonzero value to the backend */
3058 if (expect_false (waittime < backend_mintime))
3059 waittime = backend_mintime;
3060
3061 /* extra check because io_blocktime is commonly 0 */
3062 if (expect_false (io_blocktime))
3063 {
3064 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3065
3066 if (sleeptime > waittime - backend_mintime)
3067 sleeptime = waittime - backend_mintime;
3068
3069 if (expect_true (sleeptime > 0.))
3070 {
3071 ev_sleep (sleeptime);
3072 waittime -= sleeptime;
3073 }
3074 }
1178 } 3075 }
1179 3076
1180 method_poll (EV_A_ block); 3077#if EV_FEATURE_API
3078 ++loop_count;
3079#endif
3080 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3081 backend_poll (EV_A_ waittime);
3082 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1181 3083
3084 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3085
3086 if (pipe_write_skipped)
3087 {
3088 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3089 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3090 }
3091
3092
1182 /* update rt_now, do magic */ 3093 /* update ev_rt_now, do magic */
1183 time_update (EV_A); 3094 time_update (EV_A_ waittime + sleeptime);
3095 }
1184 3096
1185 /* queue pending timers and reschedule them */ 3097 /* queue pending timers and reschedule them */
1186 timers_reify (EV_A); /* relative timers called last */ 3098 timers_reify (EV_A); /* relative timers called last */
3099#if EV_PERIODIC_ENABLE
1187 periodics_reify (EV_A); /* absolute timers called first */ 3100 periodics_reify (EV_A); /* absolute timers called first */
3101#endif
1188 3102
3103#if EV_IDLE_ENABLE
1189 /* queue idle watchers unless io or timers are pending */ 3104 /* queue idle watchers unless other events are pending */
1190 if (idlecnt && !any_pending (EV_A)) 3105 idle_reify (EV_A);
1191 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3106#endif
1192 3107
3108#if EV_CHECK_ENABLE
1193 /* queue check watchers, to be executed first */ 3109 /* queue check watchers, to be executed first */
1194 if (checkcnt) 3110 if (expect_false (checkcnt))
1195 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3111 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3112#endif
1196 3113
1197 call_pending (EV_A); 3114 EV_INVOKE_PENDING;
1198 } 3115 }
1199 while (activecnt && !loop_done); 3116 while (expect_true (
3117 activecnt
3118 && !loop_done
3119 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3120 ));
1200 3121
1201 if (loop_done != 2) 3122 if (loop_done == EVBREAK_ONE)
1202 loop_done = 0; 3123 loop_done = EVBREAK_CANCEL;
3124
3125#if EV_FEATURE_API
3126 --loop_depth;
3127#endif
3128
3129 return activecnt;
1203} 3130}
1204 3131
1205void 3132void
1206ev_unloop (EV_P_ int how) 3133ev_break (EV_P_ int how) EV_THROW
1207{ 3134{
1208 loop_done = how; 3135 loop_done = how;
1209} 3136}
1210 3137
3138void
3139ev_ref (EV_P) EV_THROW
3140{
3141 ++activecnt;
3142}
3143
3144void
3145ev_unref (EV_P) EV_THROW
3146{
3147 --activecnt;
3148}
3149
3150void
3151ev_now_update (EV_P) EV_THROW
3152{
3153 time_update (EV_A_ 1e100);
3154}
3155
3156void
3157ev_suspend (EV_P) EV_THROW
3158{
3159 ev_now_update (EV_A);
3160}
3161
3162void
3163ev_resume (EV_P) EV_THROW
3164{
3165 ev_tstamp mn_prev = mn_now;
3166
3167 ev_now_update (EV_A);
3168 timers_reschedule (EV_A_ mn_now - mn_prev);
3169#if EV_PERIODIC_ENABLE
3170 /* TODO: really do this? */
3171 periodics_reschedule (EV_A);
3172#endif
3173}
3174
1211/*****************************************************************************/ 3175/*****************************************************************************/
3176/* singly-linked list management, used when the expected list length is short */
1212 3177
1213inline void 3178inline_size void
1214wlist_add (WL *head, WL elem) 3179wlist_add (WL *head, WL elem)
1215{ 3180{
1216 elem->next = *head; 3181 elem->next = *head;
1217 *head = elem; 3182 *head = elem;
1218} 3183}
1219 3184
1220inline void 3185inline_size void
1221wlist_del (WL *head, WL elem) 3186wlist_del (WL *head, WL elem)
1222{ 3187{
1223 while (*head) 3188 while (*head)
1224 { 3189 {
1225 if (*head == elem) 3190 if (expect_true (*head == elem))
1226 { 3191 {
1227 *head = elem->next; 3192 *head = elem->next;
1228 return; 3193 break;
1229 } 3194 }
1230 3195
1231 head = &(*head)->next; 3196 head = &(*head)->next;
1232 } 3197 }
1233} 3198}
1234 3199
3200/* internal, faster, version of ev_clear_pending */
1235inline void 3201inline_speed void
1236ev_clear_pending (EV_P_ W w) 3202clear_pending (EV_P_ W w)
1237{ 3203{
1238 if (w->pending) 3204 if (w->pending)
1239 { 3205 {
1240 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3206 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1241 w->pending = 0; 3207 w->pending = 0;
1242 } 3208 }
1243} 3209}
1244 3210
3211int
3212ev_clear_pending (EV_P_ void *w) EV_THROW
3213{
3214 W w_ = (W)w;
3215 int pending = w_->pending;
3216
3217 if (expect_true (pending))
3218 {
3219 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3220 p->w = (W)&pending_w;
3221 w_->pending = 0;
3222 return p->events;
3223 }
3224 else
3225 return 0;
3226}
3227
1245inline void 3228inline_size void
3229pri_adjust (EV_P_ W w)
3230{
3231 int pri = ev_priority (w);
3232 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3233 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3234 ev_set_priority (w, pri);
3235}
3236
3237inline_speed void
1246ev_start (EV_P_ W w, int active) 3238ev_start (EV_P_ W w, int active)
1247{ 3239{
1248 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3240 pri_adjust (EV_A_ w);
1249 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1250
1251 w->active = active; 3241 w->active = active;
1252 ev_ref (EV_A); 3242 ev_ref (EV_A);
1253} 3243}
1254 3244
1255inline void 3245inline_size void
1256ev_stop (EV_P_ W w) 3246ev_stop (EV_P_ W w)
1257{ 3247{
1258 ev_unref (EV_A); 3248 ev_unref (EV_A);
1259 w->active = 0; 3249 w->active = 0;
1260} 3250}
1261 3251
1262/*****************************************************************************/ 3252/*****************************************************************************/
1263 3253
1264void 3254void noinline
1265ev_io_start (EV_P_ struct ev_io *w) 3255ev_io_start (EV_P_ ev_io *w) EV_THROW
1266{ 3256{
1267 int fd = w->fd; 3257 int fd = w->fd;
1268 3258
3259 if (expect_false (ev_is_active (w)))
3260 return;
3261
3262 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3263 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3264
3265 EV_FREQUENT_CHECK;
3266
3267 ev_start (EV_A_ (W)w, 1);
3268 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3269 wlist_add (&anfds[fd].head, (WL)w);
3270
3271 /* common bug, apparently */
3272 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3273
3274 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3275 w->events &= ~EV__IOFDSET;
3276
3277 EV_FREQUENT_CHECK;
3278}
3279
3280void noinline
3281ev_io_stop (EV_P_ ev_io *w) EV_THROW
3282{
3283 clear_pending (EV_A_ (W)w);
3284 if (expect_false (!ev_is_active (w)))
3285 return;
3286
3287 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3288
3289 EV_FREQUENT_CHECK;
3290
3291 wlist_del (&anfds[w->fd].head, (WL)w);
3292 ev_stop (EV_A_ (W)w);
3293
3294 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3295
3296 EV_FREQUENT_CHECK;
3297}
3298
3299void noinline
3300ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3301{
3302 if (expect_false (ev_is_active (w)))
3303 return;
3304
3305 ev_at (w) += mn_now;
3306
3307 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3308
3309 EV_FREQUENT_CHECK;
3310
3311 ++timercnt;
3312 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3313 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3314 ANHE_w (timers [ev_active (w)]) = (WT)w;
3315 ANHE_at_cache (timers [ev_active (w)]);
3316 upheap (timers, ev_active (w));
3317
3318 EV_FREQUENT_CHECK;
3319
3320 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3321}
3322
3323void noinline
3324ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3325{
3326 clear_pending (EV_A_ (W)w);
3327 if (expect_false (!ev_is_active (w)))
3328 return;
3329
3330 EV_FREQUENT_CHECK;
3331
3332 {
3333 int active = ev_active (w);
3334
3335 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3336
3337 --timercnt;
3338
3339 if (expect_true (active < timercnt + HEAP0))
3340 {
3341 timers [active] = timers [timercnt + HEAP0];
3342 adjustheap (timers, timercnt, active);
3343 }
3344 }
3345
3346 ev_at (w) -= mn_now;
3347
3348 ev_stop (EV_A_ (W)w);
3349
3350 EV_FREQUENT_CHECK;
3351}
3352
3353void noinline
3354ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3355{
3356 EV_FREQUENT_CHECK;
3357
3358 clear_pending (EV_A_ (W)w);
3359
1269 if (ev_is_active (w)) 3360 if (ev_is_active (w))
1270 return;
1271
1272 assert (("ev_io_start called with negative fd", fd >= 0));
1273
1274 ev_start (EV_A_ (W)w, 1);
1275 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1276 wlist_add ((WL *)&anfds[fd].head, (WL)w);
1277
1278 fd_change (EV_A_ fd);
1279}
1280
1281void
1282ev_io_stop (EV_P_ struct ev_io *w)
1283{
1284 ev_clear_pending (EV_A_ (W)w);
1285 if (!ev_is_active (w))
1286 return;
1287
1288 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1289 ev_stop (EV_A_ (W)w);
1290
1291 fd_change (EV_A_ w->fd);
1292}
1293
1294void
1295ev_timer_start (EV_P_ struct ev_timer *w)
1296{
1297 if (ev_is_active (w))
1298 return;
1299
1300 ((WT)w)->at += mn_now;
1301
1302 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1303
1304 ev_start (EV_A_ (W)w, ++timercnt);
1305 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1306 timers [timercnt - 1] = w;
1307 upheap ((WT *)timers, timercnt - 1);
1308
1309 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1310}
1311
1312void
1313ev_timer_stop (EV_P_ struct ev_timer *w)
1314{
1315 ev_clear_pending (EV_A_ (W)w);
1316 if (!ev_is_active (w))
1317 return;
1318
1319 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1320
1321 if (((W)w)->active < timercnt--)
1322 {
1323 timers [((W)w)->active - 1] = timers [timercnt];
1324 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1325 }
1326
1327 ((WT)w)->at = w->repeat;
1328
1329 ev_stop (EV_A_ (W)w);
1330}
1331
1332void
1333ev_timer_again (EV_P_ struct ev_timer *w)
1334{
1335 if (ev_is_active (w))
1336 { 3361 {
1337 if (w->repeat) 3362 if (w->repeat)
1338 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat); 3363 {
3364 ev_at (w) = mn_now + w->repeat;
3365 ANHE_at_cache (timers [ev_active (w)]);
3366 adjustheap (timers, timercnt, ev_active (w));
3367 }
1339 else 3368 else
1340 ev_timer_stop (EV_A_ w); 3369 ev_timer_stop (EV_A_ w);
1341 } 3370 }
1342 else if (w->repeat) 3371 else if (w->repeat)
3372 {
3373 ev_at (w) = w->repeat;
1343 ev_timer_start (EV_A_ w); 3374 ev_timer_start (EV_A_ w);
1344} 3375 }
1345 3376
1346void 3377 EV_FREQUENT_CHECK;
3378}
3379
3380ev_tstamp
3381ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3382{
3383 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3384}
3385
3386#if EV_PERIODIC_ENABLE
3387void noinline
1347ev_periodic_start (EV_P_ struct ev_periodic *w) 3388ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1348{ 3389{
1349 if (ev_is_active (w)) 3390 if (expect_false (ev_is_active (w)))
1350 return; 3391 return;
1351 3392
1352 if (w->reschedule_cb) 3393 if (w->reschedule_cb)
1353 ((WT)w)->at = w->reschedule_cb (w, rt_now); 3394 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1354 else if (w->interval) 3395 else if (w->interval)
1355 { 3396 {
1356 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3397 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1357 /* this formula differs from the one in periodic_reify because we do not always round up */ 3398 periodic_recalc (EV_A_ w);
1358 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1359 } 3399 }
3400 else
3401 ev_at (w) = w->offset;
1360 3402
3403 EV_FREQUENT_CHECK;
3404
3405 ++periodiccnt;
1361 ev_start (EV_A_ (W)w, ++periodiccnt); 3406 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1362 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 3407 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1363 periodics [periodiccnt - 1] = w; 3408 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1364 upheap ((WT *)periodics, periodiccnt - 1); 3409 ANHE_at_cache (periodics [ev_active (w)]);
3410 upheap (periodics, ev_active (w));
1365 3411
3412 EV_FREQUENT_CHECK;
3413
1366 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3414 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1367} 3415}
1368 3416
1369void 3417void noinline
1370ev_periodic_stop (EV_P_ struct ev_periodic *w) 3418ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1371{ 3419{
1372 ev_clear_pending (EV_A_ (W)w); 3420 clear_pending (EV_A_ (W)w);
1373 if (!ev_is_active (w)) 3421 if (expect_false (!ev_is_active (w)))
1374 return; 3422 return;
1375 3423
3424 EV_FREQUENT_CHECK;
3425
3426 {
3427 int active = ev_active (w);
3428
1376 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3429 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1377 3430
1378 if (((W)w)->active < periodiccnt--) 3431 --periodiccnt;
3432
3433 if (expect_true (active < periodiccnt + HEAP0))
1379 { 3434 {
1380 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 3435 periodics [active] = periodics [periodiccnt + HEAP0];
1381 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 3436 adjustheap (periodics, periodiccnt, active);
1382 } 3437 }
3438 }
1383 3439
1384 ev_stop (EV_A_ (W)w); 3440 ev_stop (EV_A_ (W)w);
1385}
1386 3441
1387void 3442 EV_FREQUENT_CHECK;
3443}
3444
3445void noinline
1388ev_periodic_again (EV_P_ struct ev_periodic *w) 3446ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1389{ 3447{
1390 /* TODO: use adjustheap and recalculation */ 3448 /* TODO: use adjustheap and recalculation */
1391 ev_periodic_stop (EV_A_ w); 3449 ev_periodic_stop (EV_A_ w);
1392 ev_periodic_start (EV_A_ w); 3450 ev_periodic_start (EV_A_ w);
1393} 3451}
1394 3452#endif
1395void
1396ev_idle_start (EV_P_ struct ev_idle *w)
1397{
1398 if (ev_is_active (w))
1399 return;
1400
1401 ev_start (EV_A_ (W)w, ++idlecnt);
1402 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1403 idles [idlecnt - 1] = w;
1404}
1405
1406void
1407ev_idle_stop (EV_P_ struct ev_idle *w)
1408{
1409 ev_clear_pending (EV_A_ (W)w);
1410 if (ev_is_active (w))
1411 return;
1412
1413 idles [((W)w)->active - 1] = idles [--idlecnt];
1414 ev_stop (EV_A_ (W)w);
1415}
1416
1417void
1418ev_prepare_start (EV_P_ struct ev_prepare *w)
1419{
1420 if (ev_is_active (w))
1421 return;
1422
1423 ev_start (EV_A_ (W)w, ++preparecnt);
1424 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1425 prepares [preparecnt - 1] = w;
1426}
1427
1428void
1429ev_prepare_stop (EV_P_ struct ev_prepare *w)
1430{
1431 ev_clear_pending (EV_A_ (W)w);
1432 if (ev_is_active (w))
1433 return;
1434
1435 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1436 ev_stop (EV_A_ (W)w);
1437}
1438
1439void
1440ev_check_start (EV_P_ struct ev_check *w)
1441{
1442 if (ev_is_active (w))
1443 return;
1444
1445 ev_start (EV_A_ (W)w, ++checkcnt);
1446 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1447 checks [checkcnt - 1] = w;
1448}
1449
1450void
1451ev_check_stop (EV_P_ struct ev_check *w)
1452{
1453 ev_clear_pending (EV_A_ (W)w);
1454 if (ev_is_active (w))
1455 return;
1456
1457 checks [((W)w)->active - 1] = checks [--checkcnt];
1458 ev_stop (EV_A_ (W)w);
1459}
1460 3453
1461#ifndef SA_RESTART 3454#ifndef SA_RESTART
1462# define SA_RESTART 0 3455# define SA_RESTART 0
1463#endif 3456#endif
1464 3457
3458#if EV_SIGNAL_ENABLE
3459
3460void noinline
3461ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3462{
3463 if (expect_false (ev_is_active (w)))
3464 return;
3465
3466 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3467
3468#if EV_MULTIPLICITY
3469 assert (("libev: a signal must not be attached to two different loops",
3470 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3471
3472 signals [w->signum - 1].loop = EV_A;
3473#endif
3474
3475 EV_FREQUENT_CHECK;
3476
3477#if EV_USE_SIGNALFD
3478 if (sigfd == -2)
3479 {
3480 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3481 if (sigfd < 0 && errno == EINVAL)
3482 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3483
3484 if (sigfd >= 0)
3485 {
3486 fd_intern (sigfd); /* doing it twice will not hurt */
3487
3488 sigemptyset (&sigfd_set);
3489
3490 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3491 ev_set_priority (&sigfd_w, EV_MAXPRI);
3492 ev_io_start (EV_A_ &sigfd_w);
3493 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3494 }
3495 }
3496
3497 if (sigfd >= 0)
3498 {
3499 /* TODO: check .head */
3500 sigaddset (&sigfd_set, w->signum);
3501 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3502
3503 signalfd (sigfd, &sigfd_set, 0);
3504 }
3505#endif
3506
3507 ev_start (EV_A_ (W)w, 1);
3508 wlist_add (&signals [w->signum - 1].head, (WL)w);
3509
3510 if (!((WL)w)->next)
3511# if EV_USE_SIGNALFD
3512 if (sigfd < 0) /*TODO*/
3513# endif
3514 {
3515# ifdef _WIN32
3516 evpipe_init (EV_A);
3517
3518 signal (w->signum, ev_sighandler);
3519# else
3520 struct sigaction sa;
3521
3522 evpipe_init (EV_A);
3523
3524 sa.sa_handler = ev_sighandler;
3525 sigfillset (&sa.sa_mask);
3526 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3527 sigaction (w->signum, &sa, 0);
3528
3529 if (origflags & EVFLAG_NOSIGMASK)
3530 {
3531 sigemptyset (&sa.sa_mask);
3532 sigaddset (&sa.sa_mask, w->signum);
3533 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3534 }
3535#endif
3536 }
3537
3538 EV_FREQUENT_CHECK;
3539}
3540
3541void noinline
3542ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3543{
3544 clear_pending (EV_A_ (W)w);
3545 if (expect_false (!ev_is_active (w)))
3546 return;
3547
3548 EV_FREQUENT_CHECK;
3549
3550 wlist_del (&signals [w->signum - 1].head, (WL)w);
3551 ev_stop (EV_A_ (W)w);
3552
3553 if (!signals [w->signum - 1].head)
3554 {
3555#if EV_MULTIPLICITY
3556 signals [w->signum - 1].loop = 0; /* unattach from signal */
3557#endif
3558#if EV_USE_SIGNALFD
3559 if (sigfd >= 0)
3560 {
3561 sigset_t ss;
3562
3563 sigemptyset (&ss);
3564 sigaddset (&ss, w->signum);
3565 sigdelset (&sigfd_set, w->signum);
3566
3567 signalfd (sigfd, &sigfd_set, 0);
3568 sigprocmask (SIG_UNBLOCK, &ss, 0);
3569 }
3570 else
3571#endif
3572 signal (w->signum, SIG_DFL);
3573 }
3574
3575 EV_FREQUENT_CHECK;
3576}
3577
3578#endif
3579
3580#if EV_CHILD_ENABLE
3581
1465void 3582void
1466ev_signal_start (EV_P_ struct ev_signal *w) 3583ev_child_start (EV_P_ ev_child *w) EV_THROW
1467{ 3584{
1468#if EV_MULTIPLICITY 3585#if EV_MULTIPLICITY
1469 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 3586 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1470#endif 3587#endif
1471 if (ev_is_active (w)) 3588 if (expect_false (ev_is_active (w)))
1472 return; 3589 return;
1473 3590
1474 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3591 EV_FREQUENT_CHECK;
1475 3592
1476 ev_start (EV_A_ (W)w, 1); 3593 ev_start (EV_A_ (W)w, 1);
1477 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3594 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1478 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1479 3595
1480 if (!((WL)w)->next) 3596 EV_FREQUENT_CHECK;
3597}
3598
3599void
3600ev_child_stop (EV_P_ ev_child *w) EV_THROW
3601{
3602 clear_pending (EV_A_ (W)w);
3603 if (expect_false (!ev_is_active (w)))
3604 return;
3605
3606 EV_FREQUENT_CHECK;
3607
3608 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3609 ev_stop (EV_A_ (W)w);
3610
3611 EV_FREQUENT_CHECK;
3612}
3613
3614#endif
3615
3616#if EV_STAT_ENABLE
3617
3618# ifdef _WIN32
3619# undef lstat
3620# define lstat(a,b) _stati64 (a,b)
3621# endif
3622
3623#define DEF_STAT_INTERVAL 5.0074891
3624#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3625#define MIN_STAT_INTERVAL 0.1074891
3626
3627static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3628
3629#if EV_USE_INOTIFY
3630
3631/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3632# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3633
3634static void noinline
3635infy_add (EV_P_ ev_stat *w)
3636{
3637 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);
3638
3639 if (w->wd >= 0)
3640 {
3641 struct statfs sfs;
3642
3643 /* now local changes will be tracked by inotify, but remote changes won't */
3644 /* unless the filesystem is known to be local, we therefore still poll */
3645 /* also do poll on <2.6.25, but with normal frequency */
3646
3647 if (!fs_2625)
3648 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3649 else if (!statfs (w->path, &sfs)
3650 && (sfs.f_type == 0x1373 /* devfs */
3651 || sfs.f_type == 0xEF53 /* ext2/3 */
3652 || sfs.f_type == 0x3153464a /* jfs */
3653 || sfs.f_type == 0x52654973 /* reiser3 */
3654 || sfs.f_type == 0x01021994 /* tempfs */
3655 || sfs.f_type == 0x58465342 /* xfs */))
3656 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3657 else
3658 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1481 { 3659 }
1482#if WIN32 3660 else
1483 signal (w->signum, sighandler); 3661 {
3662 /* can't use inotify, continue to stat */
3663 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3664
3665 /* if path is not there, monitor some parent directory for speedup hints */
3666 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3667 /* but an efficiency issue only */
3668 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3669 {
3670 char path [4096];
3671 strcpy (path, w->path);
3672
3673 do
3674 {
3675 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3676 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3677
3678 char *pend = strrchr (path, '/');
3679
3680 if (!pend || pend == path)
3681 break;
3682
3683 *pend = 0;
3684 w->wd = inotify_add_watch (fs_fd, path, mask);
3685 }
3686 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3687 }
3688 }
3689
3690 if (w->wd >= 0)
3691 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3692
3693 /* now re-arm timer, if required */
3694 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3695 ev_timer_again (EV_A_ &w->timer);
3696 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3697}
3698
3699static void noinline
3700infy_del (EV_P_ ev_stat *w)
3701{
3702 int slot;
3703 int wd = w->wd;
3704
3705 if (wd < 0)
3706 return;
3707
3708 w->wd = -2;
3709 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3710 wlist_del (&fs_hash [slot].head, (WL)w);
3711
3712 /* remove this watcher, if others are watching it, they will rearm */
3713 inotify_rm_watch (fs_fd, wd);
3714}
3715
3716static void noinline
3717infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3718{
3719 if (slot < 0)
3720 /* overflow, need to check for all hash slots */
3721 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3722 infy_wd (EV_A_ slot, wd, ev);
3723 else
3724 {
3725 WL w_;
3726
3727 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3728 {
3729 ev_stat *w = (ev_stat *)w_;
3730 w_ = w_->next; /* lets us remove this watcher and all before it */
3731
3732 if (w->wd == wd || wd == -1)
3733 {
3734 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3735 {
3736 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3737 w->wd = -1;
3738 infy_add (EV_A_ w); /* re-add, no matter what */
3739 }
3740
3741 stat_timer_cb (EV_A_ &w->timer, 0);
3742 }
3743 }
3744 }
3745}
3746
3747static void
3748infy_cb (EV_P_ ev_io *w, int revents)
3749{
3750 char buf [EV_INOTIFY_BUFSIZE];
3751 int ofs;
3752 int len = read (fs_fd, buf, sizeof (buf));
3753
3754 for (ofs = 0; ofs < len; )
3755 {
3756 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3757 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3758 ofs += sizeof (struct inotify_event) + ev->len;
3759 }
3760}
3761
3762inline_size void ecb_cold
3763ev_check_2625 (EV_P)
3764{
3765 /* kernels < 2.6.25 are borked
3766 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3767 */
3768 if (ev_linux_version () < 0x020619)
3769 return;
3770
3771 fs_2625 = 1;
3772}
3773
3774inline_size int
3775infy_newfd (void)
3776{
3777#if defined IN_CLOEXEC && defined IN_NONBLOCK
3778 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3779 if (fd >= 0)
3780 return fd;
3781#endif
3782 return inotify_init ();
3783}
3784
3785inline_size void
3786infy_init (EV_P)
3787{
3788 if (fs_fd != -2)
3789 return;
3790
3791 fs_fd = -1;
3792
3793 ev_check_2625 (EV_A);
3794
3795 fs_fd = infy_newfd ();
3796
3797 if (fs_fd >= 0)
3798 {
3799 fd_intern (fs_fd);
3800 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3801 ev_set_priority (&fs_w, EV_MAXPRI);
3802 ev_io_start (EV_A_ &fs_w);
3803 ev_unref (EV_A);
3804 }
3805}
3806
3807inline_size void
3808infy_fork (EV_P)
3809{
3810 int slot;
3811
3812 if (fs_fd < 0)
3813 return;
3814
3815 ev_ref (EV_A);
3816 ev_io_stop (EV_A_ &fs_w);
3817 close (fs_fd);
3818 fs_fd = infy_newfd ();
3819
3820 if (fs_fd >= 0)
3821 {
3822 fd_intern (fs_fd);
3823 ev_io_set (&fs_w, fs_fd, EV_READ);
3824 ev_io_start (EV_A_ &fs_w);
3825 ev_unref (EV_A);
3826 }
3827
3828 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3829 {
3830 WL w_ = fs_hash [slot].head;
3831 fs_hash [slot].head = 0;
3832
3833 while (w_)
3834 {
3835 ev_stat *w = (ev_stat *)w_;
3836 w_ = w_->next; /* lets us add this watcher */
3837
3838 w->wd = -1;
3839
3840 if (fs_fd >= 0)
3841 infy_add (EV_A_ w); /* re-add, no matter what */
3842 else
3843 {
3844 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3845 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3846 ev_timer_again (EV_A_ &w->timer);
3847 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3848 }
3849 }
3850 }
3851}
3852
3853#endif
3854
3855#ifdef _WIN32
3856# define EV_LSTAT(p,b) _stati64 (p, b)
1484#else 3857#else
1485 struct sigaction sa; 3858# define EV_LSTAT(p,b) lstat (p, b)
1486 sa.sa_handler = sighandler;
1487 sigfillset (&sa.sa_mask);
1488 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1489 sigaction (w->signum, &sa, 0);
1490#endif 3859#endif
1491 }
1492}
1493 3860
1494void 3861void
1495ev_signal_stop (EV_P_ struct ev_signal *w) 3862ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1496{ 3863{
1497 ev_clear_pending (EV_A_ (W)w); 3864 if (lstat (w->path, &w->attr) < 0)
1498 if (!ev_is_active (w)) 3865 w->attr.st_nlink = 0;
3866 else if (!w->attr.st_nlink)
3867 w->attr.st_nlink = 1;
3868}
3869
3870static void noinline
3871stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3872{
3873 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3874
3875 ev_statdata prev = w->attr;
3876 ev_stat_stat (EV_A_ w);
3877
3878 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3879 if (
3880 prev.st_dev != w->attr.st_dev
3881 || prev.st_ino != w->attr.st_ino
3882 || prev.st_mode != w->attr.st_mode
3883 || prev.st_nlink != w->attr.st_nlink
3884 || prev.st_uid != w->attr.st_uid
3885 || prev.st_gid != w->attr.st_gid
3886 || prev.st_rdev != w->attr.st_rdev
3887 || prev.st_size != w->attr.st_size
3888 || prev.st_atime != w->attr.st_atime
3889 || prev.st_mtime != w->attr.st_mtime
3890 || prev.st_ctime != w->attr.st_ctime
3891 ) {
3892 /* we only update w->prev on actual differences */
3893 /* in case we test more often than invoke the callback, */
3894 /* to ensure that prev is always different to attr */
3895 w->prev = prev;
3896
3897 #if EV_USE_INOTIFY
3898 if (fs_fd >= 0)
3899 {
3900 infy_del (EV_A_ w);
3901 infy_add (EV_A_ w);
3902 ev_stat_stat (EV_A_ w); /* avoid race... */
3903 }
3904 #endif
3905
3906 ev_feed_event (EV_A_ w, EV_STAT);
3907 }
3908}
3909
3910void
3911ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3912{
3913 if (expect_false (ev_is_active (w)))
1499 return; 3914 return;
1500 3915
1501 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3916 ev_stat_stat (EV_A_ w);
3917
3918 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3919 w->interval = MIN_STAT_INTERVAL;
3920
3921 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3922 ev_set_priority (&w->timer, ev_priority (w));
3923
3924#if EV_USE_INOTIFY
3925 infy_init (EV_A);
3926
3927 if (fs_fd >= 0)
3928 infy_add (EV_A_ w);
3929 else
3930#endif
3931 {
3932 ev_timer_again (EV_A_ &w->timer);
3933 ev_unref (EV_A);
3934 }
3935
3936 ev_start (EV_A_ (W)w, 1);
3937
3938 EV_FREQUENT_CHECK;
3939}
3940
3941void
3942ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3943{
3944 clear_pending (EV_A_ (W)w);
3945 if (expect_false (!ev_is_active (w)))
3946 return;
3947
3948 EV_FREQUENT_CHECK;
3949
3950#if EV_USE_INOTIFY
3951 infy_del (EV_A_ w);
3952#endif
3953
3954 if (ev_is_active (&w->timer))
3955 {
3956 ev_ref (EV_A);
3957 ev_timer_stop (EV_A_ &w->timer);
3958 }
3959
1502 ev_stop (EV_A_ (W)w); 3960 ev_stop (EV_A_ (W)w);
1503 3961
1504 if (!signals [w->signum - 1].head) 3962 EV_FREQUENT_CHECK;
1505 signal (w->signum, SIG_DFL);
1506} 3963}
3964#endif
1507 3965
3966#if EV_IDLE_ENABLE
1508void 3967void
1509ev_child_start (EV_P_ struct ev_child *w) 3968ev_idle_start (EV_P_ ev_idle *w) EV_THROW
1510{ 3969{
1511#if EV_MULTIPLICITY
1512 assert (("child watchers are only supported in the default loop", loop == default_loop));
1513#endif
1514 if (ev_is_active (w)) 3970 if (expect_false (ev_is_active (w)))
1515 return; 3971 return;
1516 3972
3973 pri_adjust (EV_A_ (W)w);
3974
3975 EV_FREQUENT_CHECK;
3976
3977 {
3978 int active = ++idlecnt [ABSPRI (w)];
3979
3980 ++idleall;
3981 ev_start (EV_A_ (W)w, active);
3982
3983 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3984 idles [ABSPRI (w)][active - 1] = w;
3985 }
3986
3987 EV_FREQUENT_CHECK;
3988}
3989
3990void
3991ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3992{
3993 clear_pending (EV_A_ (W)w);
3994 if (expect_false (!ev_is_active (w)))
3995 return;
3996
3997 EV_FREQUENT_CHECK;
3998
3999 {
4000 int active = ev_active (w);
4001
4002 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4003 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4004
4005 ev_stop (EV_A_ (W)w);
4006 --idleall;
4007 }
4008
4009 EV_FREQUENT_CHECK;
4010}
4011#endif
4012
4013#if EV_PREPARE_ENABLE
4014void
4015ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4016{
4017 if (expect_false (ev_is_active (w)))
4018 return;
4019
4020 EV_FREQUENT_CHECK;
4021
4022 ev_start (EV_A_ (W)w, ++preparecnt);
4023 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4024 prepares [preparecnt - 1] = w;
4025
4026 EV_FREQUENT_CHECK;
4027}
4028
4029void
4030ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4031{
4032 clear_pending (EV_A_ (W)w);
4033 if (expect_false (!ev_is_active (w)))
4034 return;
4035
4036 EV_FREQUENT_CHECK;
4037
4038 {
4039 int active = ev_active (w);
4040
4041 prepares [active - 1] = prepares [--preparecnt];
4042 ev_active (prepares [active - 1]) = active;
4043 }
4044
4045 ev_stop (EV_A_ (W)w);
4046
4047 EV_FREQUENT_CHECK;
4048}
4049#endif
4050
4051#if EV_CHECK_ENABLE
4052void
4053ev_check_start (EV_P_ ev_check *w) EV_THROW
4054{
4055 if (expect_false (ev_is_active (w)))
4056 return;
4057
4058 EV_FREQUENT_CHECK;
4059
4060 ev_start (EV_A_ (W)w, ++checkcnt);
4061 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4062 checks [checkcnt - 1] = w;
4063
4064 EV_FREQUENT_CHECK;
4065}
4066
4067void
4068ev_check_stop (EV_P_ ev_check *w) EV_THROW
4069{
4070 clear_pending (EV_A_ (W)w);
4071 if (expect_false (!ev_is_active (w)))
4072 return;
4073
4074 EV_FREQUENT_CHECK;
4075
4076 {
4077 int active = ev_active (w);
4078
4079 checks [active - 1] = checks [--checkcnt];
4080 ev_active (checks [active - 1]) = active;
4081 }
4082
4083 ev_stop (EV_A_ (W)w);
4084
4085 EV_FREQUENT_CHECK;
4086}
4087#endif
4088
4089#if EV_EMBED_ENABLE
4090void noinline
4091ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4092{
4093 ev_run (w->other, EVRUN_NOWAIT);
4094}
4095
4096static void
4097embed_io_cb (EV_P_ ev_io *io, int revents)
4098{
4099 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4100
4101 if (ev_cb (w))
4102 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4103 else
4104 ev_run (w->other, EVRUN_NOWAIT);
4105}
4106
4107static void
4108embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4109{
4110 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4111
4112 {
4113 EV_P = w->other;
4114
4115 while (fdchangecnt)
4116 {
4117 fd_reify (EV_A);
4118 ev_run (EV_A_ EVRUN_NOWAIT);
4119 }
4120 }
4121}
4122
4123static void
4124embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4125{
4126 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4127
4128 ev_embed_stop (EV_A_ w);
4129
4130 {
4131 EV_P = w->other;
4132
4133 ev_loop_fork (EV_A);
4134 ev_run (EV_A_ EVRUN_NOWAIT);
4135 }
4136
4137 ev_embed_start (EV_A_ w);
4138}
4139
4140#if 0
4141static void
4142embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4143{
4144 ev_idle_stop (EV_A_ idle);
4145}
4146#endif
4147
4148void
4149ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4150{
4151 if (expect_false (ev_is_active (w)))
4152 return;
4153
4154 {
4155 EV_P = w->other;
4156 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4157 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4158 }
4159
4160 EV_FREQUENT_CHECK;
4161
4162 ev_set_priority (&w->io, ev_priority (w));
4163 ev_io_start (EV_A_ &w->io);
4164
4165 ev_prepare_init (&w->prepare, embed_prepare_cb);
4166 ev_set_priority (&w->prepare, EV_MINPRI);
4167 ev_prepare_start (EV_A_ &w->prepare);
4168
4169 ev_fork_init (&w->fork, embed_fork_cb);
4170 ev_fork_start (EV_A_ &w->fork);
4171
4172 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4173
1517 ev_start (EV_A_ (W)w, 1); 4174 ev_start (EV_A_ (W)w, 1);
1518 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4175
4176 EV_FREQUENT_CHECK;
1519} 4177}
1520 4178
1521void 4179void
1522ev_child_stop (EV_P_ struct ev_child *w) 4180ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
1523{ 4181{
1524 ev_clear_pending (EV_A_ (W)w); 4182 clear_pending (EV_A_ (W)w);
1525 if (ev_is_active (w)) 4183 if (expect_false (!ev_is_active (w)))
1526 return; 4184 return;
1527 4185
1528 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4186 EV_FREQUENT_CHECK;
4187
4188 ev_io_stop (EV_A_ &w->io);
4189 ev_prepare_stop (EV_A_ &w->prepare);
4190 ev_fork_stop (EV_A_ &w->fork);
4191
1529 ev_stop (EV_A_ (W)w); 4192 ev_stop (EV_A_ (W)w);
4193
4194 EV_FREQUENT_CHECK;
1530} 4195}
4196#endif
4197
4198#if EV_FORK_ENABLE
4199void
4200ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4201{
4202 if (expect_false (ev_is_active (w)))
4203 return;
4204
4205 EV_FREQUENT_CHECK;
4206
4207 ev_start (EV_A_ (W)w, ++forkcnt);
4208 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4209 forks [forkcnt - 1] = w;
4210
4211 EV_FREQUENT_CHECK;
4212}
4213
4214void
4215ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4216{
4217 clear_pending (EV_A_ (W)w);
4218 if (expect_false (!ev_is_active (w)))
4219 return;
4220
4221 EV_FREQUENT_CHECK;
4222
4223 {
4224 int active = ev_active (w);
4225
4226 forks [active - 1] = forks [--forkcnt];
4227 ev_active (forks [active - 1]) = active;
4228 }
4229
4230 ev_stop (EV_A_ (W)w);
4231
4232 EV_FREQUENT_CHECK;
4233}
4234#endif
4235
4236#if EV_CLEANUP_ENABLE
4237void
4238ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4239{
4240 if (expect_false (ev_is_active (w)))
4241 return;
4242
4243 EV_FREQUENT_CHECK;
4244
4245 ev_start (EV_A_ (W)w, ++cleanupcnt);
4246 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4247 cleanups [cleanupcnt - 1] = w;
4248
4249 /* cleanup watchers should never keep a refcount on the loop */
4250 ev_unref (EV_A);
4251 EV_FREQUENT_CHECK;
4252}
4253
4254void
4255ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4256{
4257 clear_pending (EV_A_ (W)w);
4258 if (expect_false (!ev_is_active (w)))
4259 return;
4260
4261 EV_FREQUENT_CHECK;
4262 ev_ref (EV_A);
4263
4264 {
4265 int active = ev_active (w);
4266
4267 cleanups [active - 1] = cleanups [--cleanupcnt];
4268 ev_active (cleanups [active - 1]) = active;
4269 }
4270
4271 ev_stop (EV_A_ (W)w);
4272
4273 EV_FREQUENT_CHECK;
4274}
4275#endif
4276
4277#if EV_ASYNC_ENABLE
4278void
4279ev_async_start (EV_P_ ev_async *w) EV_THROW
4280{
4281 if (expect_false (ev_is_active (w)))
4282 return;
4283
4284 w->sent = 0;
4285
4286 evpipe_init (EV_A);
4287
4288 EV_FREQUENT_CHECK;
4289
4290 ev_start (EV_A_ (W)w, ++asynccnt);
4291 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4292 asyncs [asynccnt - 1] = w;
4293
4294 EV_FREQUENT_CHECK;
4295}
4296
4297void
4298ev_async_stop (EV_P_ ev_async *w) EV_THROW
4299{
4300 clear_pending (EV_A_ (W)w);
4301 if (expect_false (!ev_is_active (w)))
4302 return;
4303
4304 EV_FREQUENT_CHECK;
4305
4306 {
4307 int active = ev_active (w);
4308
4309 asyncs [active - 1] = asyncs [--asynccnt];
4310 ev_active (asyncs [active - 1]) = active;
4311 }
4312
4313 ev_stop (EV_A_ (W)w);
4314
4315 EV_FREQUENT_CHECK;
4316}
4317
4318void
4319ev_async_send (EV_P_ ev_async *w) EV_THROW
4320{
4321 w->sent = 1;
4322 evpipe_write (EV_A_ &async_pending);
4323}
4324#endif
1531 4325
1532/*****************************************************************************/ 4326/*****************************************************************************/
1533 4327
1534struct ev_once 4328struct ev_once
1535{ 4329{
1536 struct ev_io io; 4330 ev_io io;
1537 struct ev_timer to; 4331 ev_timer to;
1538 void (*cb)(int revents, void *arg); 4332 void (*cb)(int revents, void *arg);
1539 void *arg; 4333 void *arg;
1540}; 4334};
1541 4335
1542static void 4336static void
1543once_cb (EV_P_ struct ev_once *once, int revents) 4337once_cb (EV_P_ struct ev_once *once, int revents)
1544{ 4338{
1545 void (*cb)(int revents, void *arg) = once->cb; 4339 void (*cb)(int revents, void *arg) = once->cb;
1546 void *arg = once->arg; 4340 void *arg = once->arg;
1547 4341
1548 ev_io_stop (EV_A_ &once->io); 4342 ev_io_stop (EV_A_ &once->io);
1549 ev_timer_stop (EV_A_ &once->to); 4343 ev_timer_stop (EV_A_ &once->to);
1550 ev_free (once); 4344 ev_free (once);
1551 4345
1552 cb (revents, arg); 4346 cb (revents, arg);
1553} 4347}
1554 4348
1555static void 4349static void
1556once_cb_io (EV_P_ struct ev_io *w, int revents) 4350once_cb_io (EV_P_ ev_io *w, int revents)
1557{ 4351{
1558 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4352 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4353
4354 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1559} 4355}
1560 4356
1561static void 4357static void
1562once_cb_to (EV_P_ struct ev_timer *w, int revents) 4358once_cb_to (EV_P_ ev_timer *w, int revents)
1563{ 4359{
1564 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4360 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4361
4362 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1565} 4363}
1566 4364
1567void 4365void
1568ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4366ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1569{ 4367{
1570 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4368 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1571 4369
1572 if (!once) 4370 if (expect_false (!once))
4371 {
1573 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4372 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1574 else 4373 return;
1575 { 4374 }
4375
1576 once->cb = cb; 4376 once->cb = cb;
1577 once->arg = arg; 4377 once->arg = arg;
1578 4378
1579 ev_init (&once->io, once_cb_io); 4379 ev_init (&once->io, once_cb_io);
1580 if (fd >= 0) 4380 if (fd >= 0)
4381 {
4382 ev_io_set (&once->io, fd, events);
4383 ev_io_start (EV_A_ &once->io);
4384 }
4385
4386 ev_init (&once->to, once_cb_to);
4387 if (timeout >= 0.)
4388 {
4389 ev_timer_set (&once->to, timeout, 0.);
4390 ev_timer_start (EV_A_ &once->to);
4391 }
4392}
4393
4394/*****************************************************************************/
4395
4396#if EV_WALK_ENABLE
4397void ecb_cold
4398ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4399{
4400 int i, j;
4401 ev_watcher_list *wl, *wn;
4402
4403 if (types & (EV_IO | EV_EMBED))
4404 for (i = 0; i < anfdmax; ++i)
4405 for (wl = anfds [i].head; wl; )
1581 { 4406 {
1582 ev_io_set (&once->io, fd, events); 4407 wn = wl->next;
1583 ev_io_start (EV_A_ &once->io); 4408
4409#if EV_EMBED_ENABLE
4410 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4411 {
4412 if (types & EV_EMBED)
4413 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4414 }
4415 else
4416#endif
4417#if EV_USE_INOTIFY
4418 if (ev_cb ((ev_io *)wl) == infy_cb)
4419 ;
4420 else
4421#endif
4422 if ((ev_io *)wl != &pipe_w)
4423 if (types & EV_IO)
4424 cb (EV_A_ EV_IO, wl);
4425
4426 wl = wn;
1584 } 4427 }
1585 4428
1586 ev_init (&once->to, once_cb_to); 4429 if (types & (EV_TIMER | EV_STAT))
1587 if (timeout >= 0.) 4430 for (i = timercnt + HEAP0; i-- > HEAP0; )
4431#if EV_STAT_ENABLE
4432 /*TODO: timer is not always active*/
4433 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1588 { 4434 {
1589 ev_timer_set (&once->to, timeout, 0.); 4435 if (types & EV_STAT)
1590 ev_timer_start (EV_A_ &once->to); 4436 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1591 } 4437 }
1592 } 4438 else
1593} 4439#endif
4440 if (types & EV_TIMER)
4441 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1594 4442
4443#if EV_PERIODIC_ENABLE
4444 if (types & EV_PERIODIC)
4445 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4446 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4447#endif
4448
4449#if EV_IDLE_ENABLE
4450 if (types & EV_IDLE)
4451 for (j = NUMPRI; j--; )
4452 for (i = idlecnt [j]; i--; )
4453 cb (EV_A_ EV_IDLE, idles [j][i]);
4454#endif
4455
4456#if EV_FORK_ENABLE
4457 if (types & EV_FORK)
4458 for (i = forkcnt; i--; )
4459 if (ev_cb (forks [i]) != embed_fork_cb)
4460 cb (EV_A_ EV_FORK, forks [i]);
4461#endif
4462
4463#if EV_ASYNC_ENABLE
4464 if (types & EV_ASYNC)
4465 for (i = asynccnt; i--; )
4466 cb (EV_A_ EV_ASYNC, asyncs [i]);
4467#endif
4468
4469#if EV_PREPARE_ENABLE
4470 if (types & EV_PREPARE)
4471 for (i = preparecnt; i--; )
4472# if EV_EMBED_ENABLE
4473 if (ev_cb (prepares [i]) != embed_prepare_cb)
4474# endif
4475 cb (EV_A_ EV_PREPARE, prepares [i]);
4476#endif
4477
4478#if EV_CHECK_ENABLE
4479 if (types & EV_CHECK)
4480 for (i = checkcnt; i--; )
4481 cb (EV_A_ EV_CHECK, checks [i]);
4482#endif
4483
4484#if EV_SIGNAL_ENABLE
4485 if (types & EV_SIGNAL)
4486 for (i = 0; i < EV_NSIG - 1; ++i)
4487 for (wl = signals [i].head; wl; )
4488 {
4489 wn = wl->next;
4490 cb (EV_A_ EV_SIGNAL, wl);
4491 wl = wn;
4492 }
4493#endif
4494
4495#if EV_CHILD_ENABLE
4496 if (types & EV_CHILD)
4497 for (i = (EV_PID_HASHSIZE); i--; )
4498 for (wl = childs [i]; wl; )
4499 {
4500 wn = wl->next;
4501 cb (EV_A_ EV_CHILD, wl);
4502 wl = wn;
4503 }
4504#endif
4505/* EV_STAT 0x00001000 /* stat data changed */
4506/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4507}
4508#endif
4509
4510#if EV_MULTIPLICITY
4511 #include "ev_wrap.h"
4512#endif
4513

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