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Comparing libev/ev.c (file contents):
Revision 1.144 by root, Tue Nov 27 08:11:52 2007 UTC vs.
Revision 1.424 by root, Tue May 1 22:01:40 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 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 43# include EV_CONFIG_H
39# else 44# else
40# include "config.h" 45# include "config.h"
41# endif 46# endif
42 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
43# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
46# endif 71# endif
47# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
49# endif 74# endif
50# else 75# else
51# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
53# endif 78# endif
54# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
56# endif 81# endif
57# endif 82# endif
58 83
84# if HAVE_NANOSLEEP
59# ifndef EV_USE_SELECT 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif 87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
65# endif 91# endif
66 92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
67# ifndef EV_USE_POLL 94# ifndef EV_USE_SELECT
68# if HAVE_POLL && HAVE_POLL_H 95# define EV_USE_SELECT EV_FEATURE_BACKENDS
69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
73# endif 109# endif
74 110
75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
78# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
79# define EV_USE_EPOLL 0
80# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
81# endif 118# endif
82 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
83# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
89# endif 127# endif
90 128
91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
93# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
94# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
95# define EV_USE_PORT 0
96# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
97# endif 136# endif
98 137
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
99#endif 145# endif
100 146
101#include <math.h> 147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
102#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
103#include <fcntl.h> 169#include <fcntl.h>
104#include <stddef.h> 170#include <stddef.h>
105 171
106#include <stdio.h> 172#include <stdio.h>
107 173
108#include <assert.h> 174#include <assert.h>
109#include <errno.h> 175#include <errno.h>
110#include <sys/types.h> 176#include <sys/types.h>
111#include <time.h> 177#include <time.h>
178#include <limits.h>
112 179
113#include <signal.h> 180#include <signal.h>
181
182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
114 198
115#ifndef _WIN32 199#ifndef _WIN32
116# include <sys/time.h> 200# include <sys/time.h>
117# include <sys/wait.h> 201# include <sys/wait.h>
118# include <unistd.h> 202# include <unistd.h>
119#else 203#else
204# include <io.h>
120# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
121# include <windows.h> 206# include <windows.h>
122# ifndef EV_SELECT_IS_WINSOCKET 207# ifndef EV_SELECT_IS_WINSOCKET
123# define EV_SELECT_IS_WINSOCKET 1 208# define EV_SELECT_IS_WINSOCKET 1
124# endif 209# endif
210# undef EV_AVOID_STDIO
211#endif
212
213/* OS X, in its infinite idiocy, actually HARDCODES
214 * a limit of 1024 into their select. Where people have brains,
215 * OS X engineers apparently have a vacuum. Or maybe they were
216 * ordered to have a vacuum, or they do anything for money.
217 * This might help. Or not.
218 */
219#define _DARWIN_UNLIMITED_SELECT 1
220
221/* this block tries to deduce configuration from header-defined symbols and defaults */
222
223/* try to deduce the maximum number of signals on this platform */
224#if defined EV_NSIG
225/* use what's provided */
226#elif defined NSIG
227# define EV_NSIG (NSIG)
228#elif defined _NSIG
229# define EV_NSIG (_NSIG)
230#elif defined SIGMAX
231# define EV_NSIG (SIGMAX+1)
232#elif defined SIG_MAX
233# define EV_NSIG (SIG_MAX+1)
234#elif defined _SIG_MAX
235# define EV_NSIG (_SIG_MAX+1)
236#elif defined MAXSIG
237# define EV_NSIG (MAXSIG+1)
238#elif defined MAX_SIG
239# define EV_NSIG (MAX_SIG+1)
240#elif defined SIGARRAYSIZE
241# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
242#elif defined _sys_nsig
243# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
244#else
245# error "unable to find value for NSIG, please report"
246/* to make it compile regardless, just remove the above line, */
247/* but consider reporting it, too! :) */
248# define EV_NSIG 65
249#endif
250
251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
253#endif
254
255#ifndef EV_USE_CLOCK_SYSCALL
256# if __linux && __GLIBC__ >= 2
257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
258# else
259# define EV_USE_CLOCK_SYSCALL 0
125#endif 260# endif
126 261#endif
127/**/
128 262
129#ifndef EV_USE_MONOTONIC 263#ifndef EV_USE_MONOTONIC
264# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
265# define EV_USE_MONOTONIC EV_FEATURE_OS
266# else
130# define EV_USE_MONOTONIC 0 267# define EV_USE_MONOTONIC 0
268# endif
131#endif 269#endif
132 270
133#ifndef EV_USE_REALTIME 271#ifndef EV_USE_REALTIME
134# define EV_USE_REALTIME 0 272# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
273#endif
274
275#ifndef EV_USE_NANOSLEEP
276# if _POSIX_C_SOURCE >= 199309L
277# define EV_USE_NANOSLEEP EV_FEATURE_OS
278# else
279# define EV_USE_NANOSLEEP 0
280# endif
135#endif 281#endif
136 282
137#ifndef EV_USE_SELECT 283#ifndef EV_USE_SELECT
138# define EV_USE_SELECT 1 284# define EV_USE_SELECT EV_FEATURE_BACKENDS
139#endif 285#endif
140 286
141#ifndef EV_USE_POLL 287#ifndef EV_USE_POLL
142# ifdef _WIN32 288# ifdef _WIN32
143# define EV_USE_POLL 0 289# define EV_USE_POLL 0
144# else 290# else
145# define EV_USE_POLL 1 291# define EV_USE_POLL EV_FEATURE_BACKENDS
146# endif 292# endif
147#endif 293#endif
148 294
149#ifndef EV_USE_EPOLL 295#ifndef EV_USE_EPOLL
296# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
297# define EV_USE_EPOLL EV_FEATURE_BACKENDS
298# else
150# define EV_USE_EPOLL 0 299# define EV_USE_EPOLL 0
300# endif
151#endif 301#endif
152 302
153#ifndef EV_USE_KQUEUE 303#ifndef EV_USE_KQUEUE
154# define EV_USE_KQUEUE 0 304# define EV_USE_KQUEUE 0
155#endif 305#endif
156 306
157#ifndef EV_USE_PORT 307#ifndef EV_USE_PORT
158# define EV_USE_PORT 0 308# define EV_USE_PORT 0
159#endif 309#endif
160 310
161/**/ 311#ifndef EV_USE_INOTIFY
312# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
313# define EV_USE_INOTIFY EV_FEATURE_OS
314# else
315# define EV_USE_INOTIFY 0
316# endif
317#endif
318
319#ifndef EV_PID_HASHSIZE
320# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
321#endif
322
323#ifndef EV_INOTIFY_HASHSIZE
324# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
325#endif
326
327#ifndef EV_USE_EVENTFD
328# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
329# define EV_USE_EVENTFD EV_FEATURE_OS
330# else
331# define EV_USE_EVENTFD 0
332# endif
333#endif
334
335#ifndef EV_USE_SIGNALFD
336# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
337# define EV_USE_SIGNALFD EV_FEATURE_OS
338# else
339# define EV_USE_SIGNALFD 0
340# endif
341#endif
342
343#if 0 /* debugging */
344# define EV_VERIFY 3
345# define EV_USE_4HEAP 1
346# define EV_HEAP_CACHE_AT 1
347#endif
348
349#ifndef EV_VERIFY
350# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
351#endif
352
353#ifndef EV_USE_4HEAP
354# define EV_USE_4HEAP EV_FEATURE_DATA
355#endif
356
357#ifndef EV_HEAP_CACHE_AT
358# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
359#endif
360
361/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
362/* which makes programs even slower. might work on other unices, too. */
363#if EV_USE_CLOCK_SYSCALL
364# include <sys/syscall.h>
365# ifdef SYS_clock_gettime
366# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
367# undef EV_USE_MONOTONIC
368# define EV_USE_MONOTONIC 1
369# else
370# undef EV_USE_CLOCK_SYSCALL
371# define EV_USE_CLOCK_SYSCALL 0
372# endif
373#endif
374
375/* this block fixes any misconfiguration where we know we run into trouble otherwise */
376
377#ifdef _AIX
378/* AIX has a completely broken poll.h header */
379# undef EV_USE_POLL
380# define EV_USE_POLL 0
381#endif
162 382
163#ifndef CLOCK_MONOTONIC 383#ifndef CLOCK_MONOTONIC
164# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
165# define EV_USE_MONOTONIC 0 385# define EV_USE_MONOTONIC 0
166#endif 386#endif
… …
168#ifndef CLOCK_REALTIME 388#ifndef CLOCK_REALTIME
169# undef EV_USE_REALTIME 389# undef EV_USE_REALTIME
170# define EV_USE_REALTIME 0 390# define EV_USE_REALTIME 0
171#endif 391#endif
172 392
393#if !EV_STAT_ENABLE
394# undef EV_USE_INOTIFY
395# define EV_USE_INOTIFY 0
396#endif
397
398#if !EV_USE_NANOSLEEP
399/* hp-ux has it in sys/time.h, which we unconditionally include above */
400# if !defined _WIN32 && !defined __hpux
401# include <sys/select.h>
402# endif
403#endif
404
405#if EV_USE_INOTIFY
406# include <sys/statfs.h>
407# include <sys/inotify.h>
408/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
409# ifndef IN_DONT_FOLLOW
410# undef EV_USE_INOTIFY
411# define EV_USE_INOTIFY 0
412# endif
413#endif
414
173#if EV_SELECT_IS_WINSOCKET 415#if EV_SELECT_IS_WINSOCKET
174# include <winsock.h> 416# include <winsock.h>
175#endif 417#endif
176 418
419#if EV_USE_EVENTFD
420/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
421# include <stdint.h>
422# ifndef EFD_NONBLOCK
423# define EFD_NONBLOCK O_NONBLOCK
424# endif
425# ifndef EFD_CLOEXEC
426# ifdef O_CLOEXEC
427# define EFD_CLOEXEC O_CLOEXEC
428# else
429# define EFD_CLOEXEC 02000000
430# endif
431# endif
432EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
433#endif
434
435#if EV_USE_SIGNALFD
436/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
437# include <stdint.h>
438# ifndef SFD_NONBLOCK
439# define SFD_NONBLOCK O_NONBLOCK
440# endif
441# ifndef SFD_CLOEXEC
442# ifdef O_CLOEXEC
443# define SFD_CLOEXEC O_CLOEXEC
444# else
445# define SFD_CLOEXEC 02000000
446# endif
447# endif
448EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
449
450struct signalfd_siginfo
451{
452 uint32_t ssi_signo;
453 char pad[128 - sizeof (uint32_t)];
454};
455#endif
456
177/**/ 457/**/
458
459#if EV_VERIFY >= 3
460# define EV_FREQUENT_CHECK ev_verify (EV_A)
461#else
462# define EV_FREQUENT_CHECK do { } while (0)
463#endif
464
465/*
466 * This is used to work around floating point rounding problems.
467 * This value is good at least till the year 4000.
468 */
469#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
470/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
178 471
179#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 472#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
180#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 473#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
181#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
183 474
475#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
476#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
477
478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
479/* ECB.H BEGIN */
480/*
481 * libecb - http://software.schmorp.de/pkg/libecb
482 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved.
486 *
487 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met:
489 *
490 * 1. Redistributions of source code must retain the above copyright notice,
491 * this list of conditions and the following disclaimer.
492 *
493 * 2. Redistributions in binary form must reproduce the above copyright
494 * notice, this list of conditions and the following disclaimer in the
495 * documentation and/or other materials provided with the distribution.
496 *
497 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
498 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
499 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
500 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
501 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
505 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE.
507 */
508
184#ifdef EV_H 509#ifndef ECB_H
185# include EV_H 510#define ECB_H
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
519 #if __GNUC__
520 typedef signed long long int64_t;
521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
186#else 526#else
187# include "ev.h" 527 #include <inttypes.h>
188#endif
189
190#if __GNUC__ >= 3
191# define expect(expr,value) __builtin_expect ((expr),(value))
192# define inline_size static inline /* inline for codesize */
193# if EV_MINIMAL
194# define noinline __attribute__ ((noinline))
195# define inline_speed static noinline
196# else
197# define noinline
198# define inline_speed static inline
199# endif 528#endif
529
530/* many compilers define _GNUC_ to some versions but then only implement
531 * what their idiot authors think are the "more important" extensions,
532 * causing enormous grief in return for some better fake benchmark numbers.
533 * or so.
534 * we try to detect these and simply assume they are not gcc - if they have
535 * an issue with that they should have done it right in the first place.
536 */
537#ifndef ECB_GCC_VERSION
538 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
539 #define ECB_GCC_VERSION(major,minor) 0
540 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
542 #endif
543#endif
544
545/*****************************************************************************/
546
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549
550#if ECB_NO_THREADS
551# define ECB_NO_SMP 1
552#endif
553
554#if ECB_NO_THREADS || ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0)
556#endif
557
558#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
571 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
574 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
576 #elif __sparc || __sparc__
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined __s390__ || defined __s390x__
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #elif defined __mips__
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
584 #elif defined __alpha__
585 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
586 #endif
587 #endif
588#endif
589
590#ifndef ECB_MEMORY_FENCE
591 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
592 #define ECB_MEMORY_FENCE __sync_synchronize ()
593 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
594 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
595 #elif _MSC_VER >= 1400 /* VC++ 2005 */
596 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
597 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
598 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
599 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
600 #elif defined _WIN32
601 #include <WinNT.h>
602 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
603 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
604 #include <mbarrier.h>
605 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
606 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
607 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
608 #elif __xlC__
609 #define ECB_MEMORY_FENCE __sync ()
610 #endif
611#endif
612
613#ifndef ECB_MEMORY_FENCE
614 #if !ECB_AVOID_PTHREADS
615 /*
616 * if you get undefined symbol references to pthread_mutex_lock,
617 * or failure to find pthread.h, then you should implement
618 * the ECB_MEMORY_FENCE operations for your cpu/compiler
619 * OR provide pthread.h and link against the posix thread library
620 * of your system.
621 */
622 #include <pthread.h>
623 #define ECB_NEEDS_PTHREADS 1
624 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
625
626 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
627 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
628 #endif
629#endif
630
631#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
632 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
633#endif
634
635#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
636 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
637#endif
638
639/*****************************************************************************/
640
641#define ECB_C99 (__STDC_VERSION__ >= 199901L)
642
643#if __cplusplus
644 #define ecb_inline static inline
645#elif ECB_GCC_VERSION(2,5)
646 #define ecb_inline static __inline__
647#elif ECB_C99
648 #define ecb_inline static inline
200#else 649#else
650 #define ecb_inline static
651#endif
652
653#if ECB_GCC_VERSION(3,3)
654 #define ecb_restrict __restrict__
655#elif ECB_C99
656 #define ecb_restrict restrict
657#else
658 #define ecb_restrict
659#endif
660
661typedef int ecb_bool;
662
663#define ECB_CONCAT_(a, b) a ## b
664#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
665#define ECB_STRINGIFY_(a) # a
666#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
667
668#define ecb_function_ ecb_inline
669
670#if ECB_GCC_VERSION(3,1)
671 #define ecb_attribute(attrlist) __attribute__(attrlist)
672 #define ecb_is_constant(expr) __builtin_constant_p (expr)
673 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
674 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
675#else
676 #define ecb_attribute(attrlist)
677 #define ecb_is_constant(expr) 0
201# define expect(expr,value) (expr) 678 #define ecb_expect(expr,value) (expr)
202# define inline_speed static 679 #define ecb_prefetch(addr,rw,locality)
203# define inline_minimal static
204# define noinline
205#endif 680#endif
206 681
682/* no emulation for ecb_decltype */
683#if ECB_GCC_VERSION(4,5)
684 #define ecb_decltype(x) __decltype(x)
685#elif ECB_GCC_VERSION(3,0)
686 #define ecb_decltype(x) __typeof(x)
687#endif
688
689#define ecb_noinline ecb_attribute ((__noinline__))
690#define ecb_noreturn ecb_attribute ((__noreturn__))
691#define ecb_unused ecb_attribute ((__unused__))
692#define ecb_const ecb_attribute ((__const__))
693#define ecb_pure ecb_attribute ((__pure__))
694
695#if ECB_GCC_VERSION(4,3)
696 #define ecb_artificial ecb_attribute ((__artificial__))
697 #define ecb_hot ecb_attribute ((__hot__))
698 #define ecb_cold ecb_attribute ((__cold__))
699#else
700 #define ecb_artificial
701 #define ecb_hot
702 #define ecb_cold
703#endif
704
705/* put around conditional expressions if you are very sure that the */
706/* expression is mostly true or mostly false. note that these return */
707/* booleans, not the expression. */
207#define expect_false(expr) expect ((expr) != 0, 0) 708#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
208#define expect_true(expr) expect ((expr) != 0, 1) 709#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
710/* for compatibility to the rest of the world */
711#define ecb_likely(expr) ecb_expect_true (expr)
712#define ecb_unlikely(expr) ecb_expect_false (expr)
209 713
714/* count trailing zero bits and count # of one bits */
715#if ECB_GCC_VERSION(3,4)
716 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
717 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
718 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
719 #define ecb_ctz32(x) __builtin_ctz (x)
720 #define ecb_ctz64(x) __builtin_ctzll (x)
721 #define ecb_popcount32(x) __builtin_popcount (x)
722 /* no popcountll */
723#else
724 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
725 ecb_function_ int
726 ecb_ctz32 (uint32_t x)
727 {
728 int r = 0;
729
730 x &= ~x + 1; /* this isolates the lowest bit */
731
732#if ECB_branchless_on_i386
733 r += !!(x & 0xaaaaaaaa) << 0;
734 r += !!(x & 0xcccccccc) << 1;
735 r += !!(x & 0xf0f0f0f0) << 2;
736 r += !!(x & 0xff00ff00) << 3;
737 r += !!(x & 0xffff0000) << 4;
738#else
739 if (x & 0xaaaaaaaa) r += 1;
740 if (x & 0xcccccccc) r += 2;
741 if (x & 0xf0f0f0f0) r += 4;
742 if (x & 0xff00ff00) r += 8;
743 if (x & 0xffff0000) r += 16;
744#endif
745
746 return r;
747 }
748
749 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
750 ecb_function_ int
751 ecb_ctz64 (uint64_t x)
752 {
753 int shift = x & 0xffffffffU ? 0 : 32;
754 return ecb_ctz32 (x >> shift) + shift;
755 }
756
757 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
758 ecb_function_ int
759 ecb_popcount32 (uint32_t x)
760 {
761 x -= (x >> 1) & 0x55555555;
762 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
763 x = ((x >> 4) + x) & 0x0f0f0f0f;
764 x *= 0x01010101;
765
766 return x >> 24;
767 }
768
769 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
770 ecb_function_ int ecb_ld32 (uint32_t x)
771 {
772 int r = 0;
773
774 if (x >> 16) { x >>= 16; r += 16; }
775 if (x >> 8) { x >>= 8; r += 8; }
776 if (x >> 4) { x >>= 4; r += 4; }
777 if (x >> 2) { x >>= 2; r += 2; }
778 if (x >> 1) { r += 1; }
779
780 return r;
781 }
782
783 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
784 ecb_function_ int ecb_ld64 (uint64_t x)
785 {
786 int r = 0;
787
788 if (x >> 32) { x >>= 32; r += 32; }
789
790 return r + ecb_ld32 (x);
791 }
792#endif
793
794ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
796{
797 return ( (x * 0x0802U & 0x22110U)
798 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
799}
800
801ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
802ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
803{
804 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
805 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
806 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
807 x = ( x >> 8 ) | ( x << 8);
808
809 return x;
810}
811
812ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
813ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
814{
815 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
816 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
817 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
818 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
819 x = ( x >> 16 ) | ( x << 16);
820
821 return x;
822}
823
824/* popcount64 is only available on 64 bit cpus as gcc builtin */
825/* so for this version we are lazy */
826ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
827ecb_function_ int
828ecb_popcount64 (uint64_t x)
829{
830 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
831}
832
833ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
834ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
835ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
836ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
837ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
838ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
839ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
840ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
841
842ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
843ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
844ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
845ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
846ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
847ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
848ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
849ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
850
851#if ECB_GCC_VERSION(4,3)
852 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
853 #define ecb_bswap32(x) __builtin_bswap32 (x)
854 #define ecb_bswap64(x) __builtin_bswap64 (x)
855#else
856 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
857 ecb_function_ uint16_t
858 ecb_bswap16 (uint16_t x)
859 {
860 return ecb_rotl16 (x, 8);
861 }
862
863 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
864 ecb_function_ uint32_t
865 ecb_bswap32 (uint32_t x)
866 {
867 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
868 }
869
870 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
871 ecb_function_ uint64_t
872 ecb_bswap64 (uint64_t x)
873 {
874 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
875 }
876#endif
877
878#if ECB_GCC_VERSION(4,5)
879 #define ecb_unreachable() __builtin_unreachable ()
880#else
881 /* this seems to work fine, but gcc always emits a warning for it :/ */
882 ecb_inline void ecb_unreachable (void) ecb_noreturn;
883 ecb_inline void ecb_unreachable (void) { }
884#endif
885
886/* try to tell the compiler that some condition is definitely true */
887#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
888
889ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
890ecb_inline unsigned char
891ecb_byteorder_helper (void)
892{
893 const uint32_t u = 0x11223344;
894 return *(unsigned char *)&u;
895}
896
897ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
898ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
899ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
900ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
901
902#if ECB_GCC_VERSION(3,0) || ECB_C99
903 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
904#else
905 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
906#endif
907
908#if __cplusplus
909 template<typename T>
910 static inline T ecb_div_rd (T val, T div)
911 {
912 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
913 }
914 template<typename T>
915 static inline T ecb_div_ru (T val, T div)
916 {
917 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
918 }
919#else
920 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
921 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
922#endif
923
924#if ecb_cplusplus_does_not_suck
925 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
926 template<typename T, int N>
927 static inline int ecb_array_length (const T (&arr)[N])
928 {
929 return N;
930 }
931#else
932 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
933#endif
934
935#endif
936
937/* ECB.H END */
938
939#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
940/* if your architecture doesn't need memory fences, e.g. because it is
941 * single-cpu/core, or if you use libev in a project that doesn't use libev
942 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
943 * libev, in which cases the memory fences become nops.
944 * alternatively, you can remove this #error and link against libpthread,
945 * which will then provide the memory fences.
946 */
947# error "memory fences not defined for your architecture, please report"
948#endif
949
950#ifndef ECB_MEMORY_FENCE
951# define ECB_MEMORY_FENCE do { } while (0)
952# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
953# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
954#endif
955
956#define expect_false(cond) ecb_expect_false (cond)
957#define expect_true(cond) ecb_expect_true (cond)
958#define noinline ecb_noinline
959
960#define inline_size ecb_inline
961
962#if EV_FEATURE_CODE
963# define inline_speed ecb_inline
964#else
965# define inline_speed static noinline
966#endif
967
210#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 968#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
969
970#if EV_MINPRI == EV_MAXPRI
971# define ABSPRI(w) (((W)w), 0)
972#else
211#define ABSPRI(w) ((w)->priority - EV_MINPRI) 973# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
974#endif
212 975
213#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 976#define EMPTY /* required for microsofts broken pseudo-c compiler */
214#define EMPTY2(a,b) /* used to suppress some warnings */ 977#define EMPTY2(a,b) /* used to suppress some warnings */
215 978
216typedef ev_watcher *W; 979typedef ev_watcher *W;
217typedef ev_watcher_list *WL; 980typedef ev_watcher_list *WL;
218typedef ev_watcher_time *WT; 981typedef ev_watcher_time *WT;
219 982
983#define ev_active(w) ((W)(w))->active
984#define ev_at(w) ((WT)(w))->at
985
986#if EV_USE_REALTIME
987/* sig_atomic_t is used to avoid per-thread variables or locking but still */
988/* giving it a reasonably high chance of working on typical architectures */
989static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
990#endif
991
992#if EV_USE_MONOTONIC
220static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 993static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
994#endif
995
996#ifndef EV_FD_TO_WIN32_HANDLE
997# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
998#endif
999#ifndef EV_WIN32_HANDLE_TO_FD
1000# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1001#endif
1002#ifndef EV_WIN32_CLOSE_FD
1003# define EV_WIN32_CLOSE_FD(fd) close (fd)
1004#endif
221 1005
222#ifdef _WIN32 1006#ifdef _WIN32
223# include "ev_win32.c" 1007# include "ev_win32.c"
224#endif 1008#endif
225 1009
226/*****************************************************************************/ 1010/*****************************************************************************/
227 1011
1012/* define a suitable floor function (only used by periodics atm) */
1013
1014#if EV_USE_FLOOR
1015# include <math.h>
1016# define ev_floor(v) floor (v)
1017#else
1018
1019#include <float.h>
1020
1021/* a floor() replacement function, should be independent of ev_tstamp type */
1022static ev_tstamp noinline
1023ev_floor (ev_tstamp v)
1024{
1025 /* the choice of shift factor is not terribly important */
1026#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1027 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1028#else
1029 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1030#endif
1031
1032 /* argument too large for an unsigned long? */
1033 if (expect_false (v >= shift))
1034 {
1035 ev_tstamp f;
1036
1037 if (v == v - 1.)
1038 return v; /* very large number */
1039
1040 f = shift * ev_floor (v * (1. / shift));
1041 return f + ev_floor (v - f);
1042 }
1043
1044 /* special treatment for negative args? */
1045 if (expect_false (v < 0.))
1046 {
1047 ev_tstamp f = -ev_floor (-v);
1048
1049 return f - (f == v ? 0 : 1);
1050 }
1051
1052 /* fits into an unsigned long */
1053 return (unsigned long)v;
1054}
1055
1056#endif
1057
1058/*****************************************************************************/
1059
1060#ifdef __linux
1061# include <sys/utsname.h>
1062#endif
1063
1064static unsigned int noinline ecb_cold
1065ev_linux_version (void)
1066{
1067#ifdef __linux
1068 unsigned int v = 0;
1069 struct utsname buf;
1070 int i;
1071 char *p = buf.release;
1072
1073 if (uname (&buf))
1074 return 0;
1075
1076 for (i = 3+1; --i; )
1077 {
1078 unsigned int c = 0;
1079
1080 for (;;)
1081 {
1082 if (*p >= '0' && *p <= '9')
1083 c = c * 10 + *p++ - '0';
1084 else
1085 {
1086 p += *p == '.';
1087 break;
1088 }
1089 }
1090
1091 v = (v << 8) | c;
1092 }
1093
1094 return v;
1095#else
1096 return 0;
1097#endif
1098}
1099
1100/*****************************************************************************/
1101
1102#if EV_AVOID_STDIO
1103static void noinline ecb_cold
1104ev_printerr (const char *msg)
1105{
1106 write (STDERR_FILENO, msg, strlen (msg));
1107}
1108#endif
1109
228static void (*syserr_cb)(const char *msg); 1110static void (*syserr_cb)(const char *msg) EV_THROW;
229 1111
230void 1112void ecb_cold
231ev_set_syserr_cb (void (*cb)(const char *msg)) 1113ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
232{ 1114{
233 syserr_cb = cb; 1115 syserr_cb = cb;
234} 1116}
235 1117
236static void noinline 1118static void noinline ecb_cold
237syserr (const char *msg) 1119ev_syserr (const char *msg)
238{ 1120{
239 if (!msg) 1121 if (!msg)
240 msg = "(libev) system error"; 1122 msg = "(libev) system error";
241 1123
242 if (syserr_cb) 1124 if (syserr_cb)
243 syserr_cb (msg); 1125 syserr_cb (msg);
244 else 1126 else
245 { 1127 {
1128#if EV_AVOID_STDIO
1129 ev_printerr (msg);
1130 ev_printerr (": ");
1131 ev_printerr (strerror (errno));
1132 ev_printerr ("\n");
1133#else
246 perror (msg); 1134 perror (msg);
1135#endif
247 abort (); 1136 abort ();
248 } 1137 }
249} 1138}
250 1139
1140static void *
1141ev_realloc_emul (void *ptr, long size)
1142{
1143#if __GLIBC__
1144 return realloc (ptr, size);
1145#else
1146 /* some systems, notably openbsd and darwin, fail to properly
1147 * implement realloc (x, 0) (as required by both ansi c-89 and
1148 * the single unix specification, so work around them here.
1149 */
1150
1151 if (size)
1152 return realloc (ptr, size);
1153
1154 free (ptr);
1155 return 0;
1156#endif
1157}
1158
251static void *(*alloc)(void *ptr, long size); 1159static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
252 1160
253void 1161void ecb_cold
254ev_set_allocator (void *(*cb)(void *ptr, long size)) 1162ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
255{ 1163{
256 alloc = cb; 1164 alloc = cb;
257} 1165}
258 1166
259static void * 1167inline_speed void *
260ev_realloc (void *ptr, long size) 1168ev_realloc (void *ptr, long size)
261{ 1169{
262 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1170 ptr = alloc (ptr, size);
263 1171
264 if (!ptr && size) 1172 if (!ptr && size)
265 { 1173 {
1174#if EV_AVOID_STDIO
1175 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1176#else
266 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1177 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1178#endif
267 abort (); 1179 abort ();
268 } 1180 }
269 1181
270 return ptr; 1182 return ptr;
271} 1183}
… …
273#define ev_malloc(size) ev_realloc (0, (size)) 1185#define ev_malloc(size) ev_realloc (0, (size))
274#define ev_free(ptr) ev_realloc ((ptr), 0) 1186#define ev_free(ptr) ev_realloc ((ptr), 0)
275 1187
276/*****************************************************************************/ 1188/*****************************************************************************/
277 1189
1190/* set in reify when reification needed */
1191#define EV_ANFD_REIFY 1
1192
1193/* file descriptor info structure */
278typedef struct 1194typedef struct
279{ 1195{
280 WL head; 1196 WL head;
281 unsigned char events; 1197 unsigned char events; /* the events watched for */
1198 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1199 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
282 unsigned char reify; 1200 unsigned char unused;
1201#if EV_USE_EPOLL
1202 unsigned int egen; /* generation counter to counter epoll bugs */
1203#endif
283#if EV_SELECT_IS_WINSOCKET 1204#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
284 SOCKET handle; 1205 SOCKET handle;
285#endif 1206#endif
1207#if EV_USE_IOCP
1208 OVERLAPPED or, ow;
1209#endif
286} ANFD; 1210} ANFD;
287 1211
1212/* stores the pending event set for a given watcher */
288typedef struct 1213typedef struct
289{ 1214{
290 W w; 1215 W w;
291 int events; 1216 int events; /* the pending event set for the given watcher */
292} ANPENDING; 1217} ANPENDING;
1218
1219#if EV_USE_INOTIFY
1220/* hash table entry per inotify-id */
1221typedef struct
1222{
1223 WL head;
1224} ANFS;
1225#endif
1226
1227/* Heap Entry */
1228#if EV_HEAP_CACHE_AT
1229 /* a heap element */
1230 typedef struct {
1231 ev_tstamp at;
1232 WT w;
1233 } ANHE;
1234
1235 #define ANHE_w(he) (he).w /* access watcher, read-write */
1236 #define ANHE_at(he) (he).at /* access cached at, read-only */
1237 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1238#else
1239 /* a heap element */
1240 typedef WT ANHE;
1241
1242 #define ANHE_w(he) (he)
1243 #define ANHE_at(he) (he)->at
1244 #define ANHE_at_cache(he)
1245#endif
293 1246
294#if EV_MULTIPLICITY 1247#if EV_MULTIPLICITY
295 1248
296 struct ev_loop 1249 struct ev_loop
297 { 1250 {
… …
302 #undef VAR 1255 #undef VAR
303 }; 1256 };
304 #include "ev_wrap.h" 1257 #include "ev_wrap.h"
305 1258
306 static struct ev_loop default_loop_struct; 1259 static struct ev_loop default_loop_struct;
307 struct ev_loop *ev_default_loop_ptr; 1260 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
308 1261
309#else 1262#else
310 1263
311 ev_tstamp ev_rt_now; 1264 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
312 #define VAR(name,decl) static decl; 1265 #define VAR(name,decl) static decl;
313 #include "ev_vars.h" 1266 #include "ev_vars.h"
314 #undef VAR 1267 #undef VAR
315 1268
316 static int ev_default_loop_ptr; 1269 static int ev_default_loop_ptr;
317 1270
318#endif 1271#endif
319 1272
1273#if EV_FEATURE_API
1274# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1275# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1276# define EV_INVOKE_PENDING invoke_cb (EV_A)
1277#else
1278# define EV_RELEASE_CB (void)0
1279# define EV_ACQUIRE_CB (void)0
1280# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1281#endif
1282
1283#define EVBREAK_RECURSE 0x80
1284
320/*****************************************************************************/ 1285/*****************************************************************************/
321 1286
1287#ifndef EV_HAVE_EV_TIME
322ev_tstamp 1288ev_tstamp
323ev_time (void) 1289ev_time (void) EV_THROW
324{ 1290{
325#if EV_USE_REALTIME 1291#if EV_USE_REALTIME
1292 if (expect_true (have_realtime))
1293 {
326 struct timespec ts; 1294 struct timespec ts;
327 clock_gettime (CLOCK_REALTIME, &ts); 1295 clock_gettime (CLOCK_REALTIME, &ts);
328 return ts.tv_sec + ts.tv_nsec * 1e-9; 1296 return ts.tv_sec + ts.tv_nsec * 1e-9;
329#else 1297 }
1298#endif
1299
330 struct timeval tv; 1300 struct timeval tv;
331 gettimeofday (&tv, 0); 1301 gettimeofday (&tv, 0);
332 return tv.tv_sec + tv.tv_usec * 1e-6; 1302 return tv.tv_sec + tv.tv_usec * 1e-6;
333#endif
334} 1303}
1304#endif
335 1305
336ev_tstamp inline_size 1306inline_size ev_tstamp
337get_clock (void) 1307get_clock (void)
338{ 1308{
339#if EV_USE_MONOTONIC 1309#if EV_USE_MONOTONIC
340 if (expect_true (have_monotonic)) 1310 if (expect_true (have_monotonic))
341 { 1311 {
… …
348 return ev_time (); 1318 return ev_time ();
349} 1319}
350 1320
351#if EV_MULTIPLICITY 1321#if EV_MULTIPLICITY
352ev_tstamp 1322ev_tstamp
353ev_now (EV_P) 1323ev_now (EV_P) EV_THROW
354{ 1324{
355 return ev_rt_now; 1325 return ev_rt_now;
356} 1326}
357#endif 1327#endif
358 1328
359#define array_roundsize(type,n) (((n) | 4) & ~3) 1329void
1330ev_sleep (ev_tstamp delay) EV_THROW
1331{
1332 if (delay > 0.)
1333 {
1334#if EV_USE_NANOSLEEP
1335 struct timespec ts;
1336
1337 EV_TS_SET (ts, delay);
1338 nanosleep (&ts, 0);
1339#elif defined _WIN32
1340 Sleep ((unsigned long)(delay * 1e3));
1341#else
1342 struct timeval tv;
1343
1344 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1345 /* something not guaranteed by newer posix versions, but guaranteed */
1346 /* by older ones */
1347 EV_TV_SET (tv, delay);
1348 select (0, 0, 0, 0, &tv);
1349#endif
1350 }
1351}
1352
1353/*****************************************************************************/
1354
1355#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1356
1357/* find a suitable new size for the given array, */
1358/* hopefully by rounding to a nice-to-malloc size */
1359inline_size int
1360array_nextsize (int elem, int cur, int cnt)
1361{
1362 int ncur = cur + 1;
1363
1364 do
1365 ncur <<= 1;
1366 while (cnt > ncur);
1367
1368 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1369 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1370 {
1371 ncur *= elem;
1372 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1373 ncur = ncur - sizeof (void *) * 4;
1374 ncur /= elem;
1375 }
1376
1377 return ncur;
1378}
1379
1380static void * noinline ecb_cold
1381array_realloc (int elem, void *base, int *cur, int cnt)
1382{
1383 *cur = array_nextsize (elem, *cur, cnt);
1384 return ev_realloc (base, elem * *cur);
1385}
1386
1387#define array_init_zero(base,count) \
1388 memset ((void *)(base), 0, sizeof (*(base)) * (count))
360 1389
361#define array_needsize(type,base,cur,cnt,init) \ 1390#define array_needsize(type,base,cur,cnt,init) \
362 if (expect_false ((cnt) > cur)) \ 1391 if (expect_false ((cnt) > (cur))) \
363 { \ 1392 { \
364 int newcnt = cur; \ 1393 int ecb_unused ocur_ = (cur); \
365 do \ 1394 (base) = (type *)array_realloc \
366 { \ 1395 (sizeof (type), (base), &(cur), (cnt)); \
367 newcnt = array_roundsize (type, newcnt << 1); \ 1396 init ((base) + (ocur_), (cur) - ocur_); \
368 } \
369 while ((cnt) > newcnt); \
370 \
371 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
372 init (base + cur, newcnt - cur); \
373 cur = newcnt; \
374 } 1397 }
375 1398
1399#if 0
376#define array_slim(type,stem) \ 1400#define array_slim(type,stem) \
377 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1401 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
378 { \ 1402 { \
379 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1403 stem ## max = array_roundsize (stem ## cnt >> 1); \
380 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1404 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
381 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1405 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
382 } 1406 }
1407#endif
383 1408
384#define array_free(stem, idx) \ 1409#define array_free(stem, idx) \
385 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1410 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
386 1411
387/*****************************************************************************/ 1412/*****************************************************************************/
388 1413
1414/* dummy callback for pending events */
1415static void noinline
1416pendingcb (EV_P_ ev_prepare *w, int revents)
1417{
1418}
1419
389void noinline 1420void noinline
390ev_feed_event (EV_P_ void *w, int revents) 1421ev_feed_event (EV_P_ void *w, int revents) EV_THROW
391{ 1422{
392 W w_ = (W)w; 1423 W w_ = (W)w;
1424 int pri = ABSPRI (w_);
393 1425
394 if (expect_false (w_->pending)) 1426 if (expect_false (w_->pending))
1427 pendings [pri][w_->pending - 1].events |= revents;
1428 else
395 { 1429 {
1430 w_->pending = ++pendingcnt [pri];
1431 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1432 pendings [pri][w_->pending - 1].w = w_;
396 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1433 pendings [pri][w_->pending - 1].events = revents;
397 return;
398 } 1434 }
399
400 w_->pending = ++pendingcnt [ABSPRI (w_)];
401 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
402 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
403 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
404} 1435}
405 1436
406void inline_size 1437inline_speed void
1438feed_reverse (EV_P_ W w)
1439{
1440 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1441 rfeeds [rfeedcnt++] = w;
1442}
1443
1444inline_size void
1445feed_reverse_done (EV_P_ int revents)
1446{
1447 do
1448 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1449 while (rfeedcnt);
1450}
1451
1452inline_speed void
407queue_events (EV_P_ W *events, int eventcnt, int type) 1453queue_events (EV_P_ W *events, int eventcnt, int type)
408{ 1454{
409 int i; 1455 int i;
410 1456
411 for (i = 0; i < eventcnt; ++i) 1457 for (i = 0; i < eventcnt; ++i)
412 ev_feed_event (EV_A_ events [i], type); 1458 ev_feed_event (EV_A_ events [i], type);
413} 1459}
414 1460
415/*****************************************************************************/ 1461/*****************************************************************************/
416 1462
417void inline_size 1463inline_speed void
418anfds_init (ANFD *base, int count)
419{
420 while (count--)
421 {
422 base->head = 0;
423 base->events = EV_NONE;
424 base->reify = 0;
425
426 ++base;
427 }
428}
429
430void inline_speed
431fd_event (EV_P_ int fd, int revents) 1464fd_event_nocheck (EV_P_ int fd, int revents)
432{ 1465{
433 ANFD *anfd = anfds + fd; 1466 ANFD *anfd = anfds + fd;
434 ev_io *w; 1467 ev_io *w;
435 1468
436 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1469 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
440 if (ev) 1473 if (ev)
441 ev_feed_event (EV_A_ (W)w, ev); 1474 ev_feed_event (EV_A_ (W)w, ev);
442 } 1475 }
443} 1476}
444 1477
1478/* do not submit kernel events for fds that have reify set */
1479/* because that means they changed while we were polling for new events */
1480inline_speed void
1481fd_event (EV_P_ int fd, int revents)
1482{
1483 ANFD *anfd = anfds + fd;
1484
1485 if (expect_true (!anfd->reify))
1486 fd_event_nocheck (EV_A_ fd, revents);
1487}
1488
445void 1489void
446ev_feed_fd_event (EV_P_ int fd, int revents) 1490ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
447{ 1491{
1492 if (fd >= 0 && fd < anfdmax)
448 fd_event (EV_A_ fd, revents); 1493 fd_event_nocheck (EV_A_ fd, revents);
449} 1494}
450 1495
451void inline_size 1496/* make sure the external fd watch events are in-sync */
1497/* with the kernel/libev internal state */
1498inline_size void
452fd_reify (EV_P) 1499fd_reify (EV_P)
453{ 1500{
454 int i; 1501 int i;
1502
1503#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1504 for (i = 0; i < fdchangecnt; ++i)
1505 {
1506 int fd = fdchanges [i];
1507 ANFD *anfd = anfds + fd;
1508
1509 if (anfd->reify & EV__IOFDSET && anfd->head)
1510 {
1511 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1512
1513 if (handle != anfd->handle)
1514 {
1515 unsigned long arg;
1516
1517 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1518
1519 /* handle changed, but fd didn't - we need to do it in two steps */
1520 backend_modify (EV_A_ fd, anfd->events, 0);
1521 anfd->events = 0;
1522 anfd->handle = handle;
1523 }
1524 }
1525 }
1526#endif
455 1527
456 for (i = 0; i < fdchangecnt; ++i) 1528 for (i = 0; i < fdchangecnt; ++i)
457 { 1529 {
458 int fd = fdchanges [i]; 1530 int fd = fdchanges [i];
459 ANFD *anfd = anfds + fd; 1531 ANFD *anfd = anfds + fd;
460 ev_io *w; 1532 ev_io *w;
461 1533
462 int events = 0; 1534 unsigned char o_events = anfd->events;
1535 unsigned char o_reify = anfd->reify;
463 1536
464 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1537 anfd->reify = 0;
465 events |= w->events;
466 1538
467#if EV_SELECT_IS_WINSOCKET 1539 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
468 if (events)
469 { 1540 {
470 unsigned long argp; 1541 anfd->events = 0;
471 anfd->handle = _get_osfhandle (fd); 1542
472 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1543 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1544 anfd->events |= (unsigned char)w->events;
1545
1546 if (o_events != anfd->events)
1547 o_reify = EV__IOFDSET; /* actually |= */
473 } 1548 }
474#endif
475 1549
476 anfd->reify = 0; 1550 if (o_reify & EV__IOFDSET)
477
478 backend_modify (EV_A_ fd, anfd->events, events); 1551 backend_modify (EV_A_ fd, o_events, anfd->events);
479 anfd->events = events;
480 } 1552 }
481 1553
482 fdchangecnt = 0; 1554 fdchangecnt = 0;
483} 1555}
484 1556
485void inline_size 1557/* something about the given fd changed */
1558inline_size void
486fd_change (EV_P_ int fd) 1559fd_change (EV_P_ int fd, int flags)
487{ 1560{
488 if (expect_false (anfds [fd].reify)) 1561 unsigned char reify = anfds [fd].reify;
489 return;
490
491 anfds [fd].reify = 1; 1562 anfds [fd].reify |= flags;
492 1563
1564 if (expect_true (!reify))
1565 {
493 ++fdchangecnt; 1566 ++fdchangecnt;
494 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1567 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
495 fdchanges [fdchangecnt - 1] = fd; 1568 fdchanges [fdchangecnt - 1] = fd;
1569 }
496} 1570}
497 1571
498void inline_speed 1572/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1573inline_speed void ecb_cold
499fd_kill (EV_P_ int fd) 1574fd_kill (EV_P_ int fd)
500{ 1575{
501 ev_io *w; 1576 ev_io *w;
502 1577
503 while ((w = (ev_io *)anfds [fd].head)) 1578 while ((w = (ev_io *)anfds [fd].head))
… …
505 ev_io_stop (EV_A_ w); 1580 ev_io_stop (EV_A_ w);
506 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1581 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
507 } 1582 }
508} 1583}
509 1584
510int inline_size 1585/* check whether the given fd is actually valid, for error recovery */
1586inline_size int ecb_cold
511fd_valid (int fd) 1587fd_valid (int fd)
512{ 1588{
513#ifdef _WIN32 1589#ifdef _WIN32
514 return _get_osfhandle (fd) != -1; 1590 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
515#else 1591#else
516 return fcntl (fd, F_GETFD) != -1; 1592 return fcntl (fd, F_GETFD) != -1;
517#endif 1593#endif
518} 1594}
519 1595
520/* called on EBADF to verify fds */ 1596/* called on EBADF to verify fds */
521static void noinline 1597static void noinline ecb_cold
522fd_ebadf (EV_P) 1598fd_ebadf (EV_P)
523{ 1599{
524 int fd; 1600 int fd;
525 1601
526 for (fd = 0; fd < anfdmax; ++fd) 1602 for (fd = 0; fd < anfdmax; ++fd)
527 if (anfds [fd].events) 1603 if (anfds [fd].events)
528 if (!fd_valid (fd) == -1 && errno == EBADF) 1604 if (!fd_valid (fd) && errno == EBADF)
529 fd_kill (EV_A_ fd); 1605 fd_kill (EV_A_ fd);
530} 1606}
531 1607
532/* called on ENOMEM in select/poll to kill some fds and retry */ 1608/* called on ENOMEM in select/poll to kill some fds and retry */
533static void noinline 1609static void noinline ecb_cold
534fd_enomem (EV_P) 1610fd_enomem (EV_P)
535{ 1611{
536 int fd; 1612 int fd;
537 1613
538 for (fd = anfdmax; fd--; ) 1614 for (fd = anfdmax; fd--; )
539 if (anfds [fd].events) 1615 if (anfds [fd].events)
540 { 1616 {
541 fd_kill (EV_A_ fd); 1617 fd_kill (EV_A_ fd);
542 return; 1618 break;
543 } 1619 }
544} 1620}
545 1621
546/* usually called after fork if backend needs to re-arm all fds from scratch */ 1622/* usually called after fork if backend needs to re-arm all fds from scratch */
547static void noinline 1623static void noinline
548fd_rearm_all (EV_P) 1624fd_rearm_all (EV_P)
549{ 1625{
550 int fd; 1626 int fd;
551 1627
552 /* this should be highly optimised to not do anything but set a flag */
553 for (fd = 0; fd < anfdmax; ++fd) 1628 for (fd = 0; fd < anfdmax; ++fd)
554 if (anfds [fd].events) 1629 if (anfds [fd].events)
555 { 1630 {
556 anfds [fd].events = 0; 1631 anfds [fd].events = 0;
557 fd_change (EV_A_ fd); 1632 anfds [fd].emask = 0;
1633 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
558 } 1634 }
559} 1635}
560 1636
561/*****************************************************************************/ 1637/* used to prepare libev internal fd's */
562 1638/* this is not fork-safe */
563void inline_speed 1639inline_speed void
564upheap (WT *heap, int k)
565{
566 WT w = heap [k];
567
568 while (k && heap [k >> 1]->at > w->at)
569 {
570 heap [k] = heap [k >> 1];
571 ((W)heap [k])->active = k + 1;
572 k >>= 1;
573 }
574
575 heap [k] = w;
576 ((W)heap [k])->active = k + 1;
577
578}
579
580void inline_speed
581downheap (WT *heap, int N, int k)
582{
583 WT w = heap [k];
584
585 while (k < (N >> 1))
586 {
587 int j = k << 1;
588
589 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
590 ++j;
591
592 if (w->at <= heap [j]->at)
593 break;
594
595 heap [k] = heap [j];
596 ((W)heap [k])->active = k + 1;
597 k = j;
598 }
599
600 heap [k] = w;
601 ((W)heap [k])->active = k + 1;
602}
603
604void inline_size
605adjustheap (WT *heap, int N, int k)
606{
607 upheap (heap, k);
608 downheap (heap, N, k);
609}
610
611/*****************************************************************************/
612
613typedef struct
614{
615 WL head;
616 sig_atomic_t volatile gotsig;
617} ANSIG;
618
619static ANSIG *signals;
620static int signalmax;
621
622static int sigpipe [2];
623static sig_atomic_t volatile gotsig;
624static ev_io sigev;
625
626void inline_size
627signals_init (ANSIG *base, int count)
628{
629 while (count--)
630 {
631 base->head = 0;
632 base->gotsig = 0;
633
634 ++base;
635 }
636}
637
638static void
639sighandler (int signum)
640{
641#if _WIN32
642 signal (signum, sighandler);
643#endif
644
645 signals [signum - 1].gotsig = 1;
646
647 if (!gotsig)
648 {
649 int old_errno = errno;
650 gotsig = 1;
651 write (sigpipe [1], &signum, 1);
652 errno = old_errno;
653 }
654}
655
656void noinline
657ev_feed_signal_event (EV_P_ int signum)
658{
659 WL w;
660
661#if EV_MULTIPLICITY
662 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
663#endif
664
665 --signum;
666
667 if (signum < 0 || signum >= signalmax)
668 return;
669
670 signals [signum].gotsig = 0;
671
672 for (w = signals [signum].head; w; w = w->next)
673 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
674}
675
676static void
677sigcb (EV_P_ ev_io *iow, int revents)
678{
679 int signum;
680
681 read (sigpipe [0], &revents, 1);
682 gotsig = 0;
683
684 for (signum = signalmax; signum--; )
685 if (signals [signum].gotsig)
686 ev_feed_signal_event (EV_A_ signum + 1);
687}
688
689void inline_size
690fd_intern (int fd) 1640fd_intern (int fd)
691{ 1641{
692#ifdef _WIN32 1642#ifdef _WIN32
693 int arg = 1; 1643 unsigned long arg = 1;
694 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1644 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
695#else 1645#else
696 fcntl (fd, F_SETFD, FD_CLOEXEC); 1646 fcntl (fd, F_SETFD, FD_CLOEXEC);
697 fcntl (fd, F_SETFL, O_NONBLOCK); 1647 fcntl (fd, F_SETFL, O_NONBLOCK);
698#endif 1648#endif
699} 1649}
700 1650
701static void noinline
702siginit (EV_P)
703{
704 fd_intern (sigpipe [0]);
705 fd_intern (sigpipe [1]);
706
707 ev_io_set (&sigev, sigpipe [0], EV_READ);
708 ev_io_start (EV_A_ &sigev);
709 ev_unref (EV_A); /* child watcher should not keep loop alive */
710}
711
712/*****************************************************************************/ 1651/*****************************************************************************/
713 1652
714static ev_child *childs [PID_HASHSIZE]; 1653/*
1654 * the heap functions want a real array index. array index 0 is guaranteed to not
1655 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1656 * the branching factor of the d-tree.
1657 */
715 1658
1659/*
1660 * at the moment we allow libev the luxury of two heaps,
1661 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1662 * which is more cache-efficient.
1663 * the difference is about 5% with 50000+ watchers.
1664 */
1665#if EV_USE_4HEAP
1666
1667#define DHEAP 4
1668#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1669#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1670#define UPHEAP_DONE(p,k) ((p) == (k))
1671
1672/* away from the root */
1673inline_speed void
1674downheap (ANHE *heap, int N, int k)
1675{
1676 ANHE he = heap [k];
1677 ANHE *E = heap + N + HEAP0;
1678
1679 for (;;)
1680 {
1681 ev_tstamp minat;
1682 ANHE *minpos;
1683 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1684
1685 /* find minimum child */
1686 if (expect_true (pos + DHEAP - 1 < E))
1687 {
1688 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1689 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1690 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1691 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1692 }
1693 else if (pos < E)
1694 {
1695 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1696 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1697 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1698 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1699 }
1700 else
1701 break;
1702
1703 if (ANHE_at (he) <= minat)
1704 break;
1705
1706 heap [k] = *minpos;
1707 ev_active (ANHE_w (*minpos)) = k;
1708
1709 k = minpos - heap;
1710 }
1711
1712 heap [k] = he;
1713 ev_active (ANHE_w (he)) = k;
1714}
1715
1716#else /* 4HEAP */
1717
1718#define HEAP0 1
1719#define HPARENT(k) ((k) >> 1)
1720#define UPHEAP_DONE(p,k) (!(p))
1721
1722/* away from the root */
1723inline_speed void
1724downheap (ANHE *heap, int N, int k)
1725{
1726 ANHE he = heap [k];
1727
1728 for (;;)
1729 {
1730 int c = k << 1;
1731
1732 if (c >= N + HEAP0)
1733 break;
1734
1735 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1736 ? 1 : 0;
1737
1738 if (ANHE_at (he) <= ANHE_at (heap [c]))
1739 break;
1740
1741 heap [k] = heap [c];
1742 ev_active (ANHE_w (heap [k])) = k;
1743
1744 k = c;
1745 }
1746
1747 heap [k] = he;
1748 ev_active (ANHE_w (he)) = k;
1749}
1750#endif
1751
1752/* towards the root */
1753inline_speed void
1754upheap (ANHE *heap, int k)
1755{
1756 ANHE he = heap [k];
1757
1758 for (;;)
1759 {
1760 int p = HPARENT (k);
1761
1762 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1763 break;
1764
1765 heap [k] = heap [p];
1766 ev_active (ANHE_w (heap [k])) = k;
1767 k = p;
1768 }
1769
1770 heap [k] = he;
1771 ev_active (ANHE_w (he)) = k;
1772}
1773
1774/* move an element suitably so it is in a correct place */
1775inline_size void
1776adjustheap (ANHE *heap, int N, int k)
1777{
1778 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1779 upheap (heap, k);
1780 else
1781 downheap (heap, N, k);
1782}
1783
1784/* rebuild the heap: this function is used only once and executed rarely */
1785inline_size void
1786reheap (ANHE *heap, int N)
1787{
1788 int i;
1789
1790 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1791 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1792 for (i = 0; i < N; ++i)
1793 upheap (heap, i + HEAP0);
1794}
1795
1796/*****************************************************************************/
1797
1798/* associate signal watchers to a signal signal */
1799typedef struct
1800{
1801 EV_ATOMIC_T pending;
1802#if EV_MULTIPLICITY
1803 EV_P;
1804#endif
1805 WL head;
1806} ANSIG;
1807
1808static ANSIG signals [EV_NSIG - 1];
1809
1810/*****************************************************************************/
1811
1812#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1813
1814static void noinline ecb_cold
1815evpipe_init (EV_P)
1816{
1817 if (!ev_is_active (&pipe_w))
1818 {
1819# if EV_USE_EVENTFD
1820 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1821 if (evfd < 0 && errno == EINVAL)
1822 evfd = eventfd (0, 0);
1823
1824 if (evfd >= 0)
1825 {
1826 evpipe [0] = -1;
1827 fd_intern (evfd); /* doing it twice doesn't hurt */
1828 ev_io_set (&pipe_w, evfd, EV_READ);
1829 }
1830 else
1831# endif
1832 {
1833 while (pipe (evpipe))
1834 ev_syserr ("(libev) error creating signal/async pipe");
1835
1836 fd_intern (evpipe [0]);
1837 fd_intern (evpipe [1]);
1838 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1839 }
1840
1841 ev_io_start (EV_A_ &pipe_w);
1842 ev_unref (EV_A); /* watcher should not keep loop alive */
1843 }
1844}
1845
1846inline_speed void
1847evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1848{
1849 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1850
1851 if (expect_true (*flag))
1852 return;
1853
1854 *flag = 1;
1855
1856 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1857
1858 pipe_write_skipped = 1;
1859
1860 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1861
1862 if (pipe_write_wanted)
1863 {
1864 int old_errno;
1865
1866 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1867
1868 old_errno = errno; /* save errno because write will clobber it */
1869
1870#if EV_USE_EVENTFD
1871 if (evfd >= 0)
1872 {
1873 uint64_t counter = 1;
1874 write (evfd, &counter, sizeof (uint64_t));
1875 }
1876 else
1877#endif
1878 {
1879 /* win32 people keep sending patches that change this write() to send() */
1880 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1881 /* so when you think this write should be a send instead, please find out */
1882 /* where your send() is from - it's definitely not the microsoft send, and */
1883 /* tell me. thank you. */
1884 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1885 /* check the ev documentation on how to use this flag */
1886 write (evpipe [1], &(evpipe [1]), 1);
1887 }
1888
1889 errno = old_errno;
1890 }
1891}
1892
1893/* called whenever the libev signal pipe */
1894/* got some events (signal, async) */
1895static void
1896pipecb (EV_P_ ev_io *iow, int revents)
1897{
1898 int i;
1899
1900 if (revents & EV_READ)
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;
1912 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1913 read (evpipe [0], &dummy, 1);
1914 }
1915 }
1916
1917 pipe_write_skipped = 0;
1918
1919 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1920
1921#if EV_SIGNAL_ENABLE
1922 if (sig_pending)
1923 {
1924 sig_pending = 0;
1925
1926 ECB_MEMORY_FENCE_RELEASE;
1927
1928 for (i = EV_NSIG - 1; i--; )
1929 if (expect_false (signals [i].pending))
1930 ev_feed_signal_event (EV_A_ i + 1);
1931 }
1932#endif
1933
1934#if EV_ASYNC_ENABLE
1935 if (async_pending)
1936 {
1937 async_pending = 0;
1938
1939 ECB_MEMORY_FENCE_RELEASE;
1940
1941 for (i = asynccnt; i--; )
1942 if (asyncs [i]->sent)
1943 {
1944 asyncs [i]->sent = 0;
1945 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1946 }
1947 }
1948#endif
1949}
1950
1951/*****************************************************************************/
1952
1953void
1954ev_feed_signal (int signum) EV_THROW
1955{
1956#if EV_MULTIPLICITY
1957 EV_P = signals [signum - 1].loop;
1958
1959 if (!EV_A)
1960 return;
1961#endif
1962
1963 if (!ev_active (&pipe_w))
1964 return;
1965
1966 signals [signum - 1].pending = 1;
1967 evpipe_write (EV_A_ &sig_pending);
1968}
1969
1970static void
1971ev_sighandler (int signum)
1972{
716#ifndef _WIN32 1973#ifdef _WIN32
1974 signal (signum, ev_sighandler);
1975#endif
1976
1977 ev_feed_signal (signum);
1978}
1979
1980void noinline
1981ev_feed_signal_event (EV_P_ int signum) EV_THROW
1982{
1983 WL w;
1984
1985 if (expect_false (signum <= 0 || signum > EV_NSIG))
1986 return;
1987
1988 --signum;
1989
1990#if EV_MULTIPLICITY
1991 /* it is permissible to try to feed a signal to the wrong loop */
1992 /* or, likely more useful, feeding a signal nobody is waiting for */
1993
1994 if (expect_false (signals [signum].loop != EV_A))
1995 return;
1996#endif
1997
1998 signals [signum].pending = 0;
1999
2000 for (w = signals [signum].head; w; w = w->next)
2001 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2002}
2003
2004#if EV_USE_SIGNALFD
2005static void
2006sigfdcb (EV_P_ ev_io *iow, int revents)
2007{
2008 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2009
2010 for (;;)
2011 {
2012 ssize_t res = read (sigfd, si, sizeof (si));
2013
2014 /* not ISO-C, as res might be -1, but works with SuS */
2015 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2016 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2017
2018 if (res < (ssize_t)sizeof (si))
2019 break;
2020 }
2021}
2022#endif
2023
2024#endif
2025
2026/*****************************************************************************/
2027
2028#if EV_CHILD_ENABLE
2029static WL childs [EV_PID_HASHSIZE];
717 2030
718static ev_signal childev; 2031static ev_signal childev;
719 2032
720void inline_speed 2033#ifndef WIFCONTINUED
2034# define WIFCONTINUED(status) 0
2035#endif
2036
2037/* handle a single child status event */
2038inline_speed void
721child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2039child_reap (EV_P_ int chain, int pid, int status)
722{ 2040{
723 ev_child *w; 2041 ev_child *w;
2042 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
724 2043
725 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2044 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2045 {
726 if (w->pid == pid || !w->pid) 2046 if ((w->pid == pid || !w->pid)
2047 && (!traced || (w->flags & 1)))
727 { 2048 {
728 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 2049 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
729 w->rpid = pid; 2050 w->rpid = pid;
730 w->rstatus = status; 2051 w->rstatus = status;
731 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2052 ev_feed_event (EV_A_ (W)w, EV_CHILD);
732 } 2053 }
2054 }
733} 2055}
734 2056
735#ifndef WCONTINUED 2057#ifndef WCONTINUED
736# define WCONTINUED 0 2058# define WCONTINUED 0
737#endif 2059#endif
738 2060
2061/* called on sigchld etc., calls waitpid */
739static void 2062static void
740childcb (EV_P_ ev_signal *sw, int revents) 2063childcb (EV_P_ ev_signal *sw, int revents)
741{ 2064{
742 int pid, status; 2065 int pid, status;
743 2066
… …
746 if (!WCONTINUED 2069 if (!WCONTINUED
747 || errno != EINVAL 2070 || errno != EINVAL
748 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2071 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
749 return; 2072 return;
750 2073
751 /* make sure we are called again until all childs have been reaped */ 2074 /* make sure we are called again until all children have been reaped */
752 /* we need to do it this way so that the callback gets called before we continue */ 2075 /* we need to do it this way so that the callback gets called before we continue */
753 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2076 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
754 2077
755 child_reap (EV_A_ sw, pid, pid, status); 2078 child_reap (EV_A_ pid, pid, status);
2079 if ((EV_PID_HASHSIZE) > 1)
756 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2080 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
757} 2081}
758 2082
759#endif 2083#endif
760 2084
761/*****************************************************************************/ 2085/*****************************************************************************/
762 2086
2087#if EV_USE_IOCP
2088# include "ev_iocp.c"
2089#endif
763#if EV_USE_PORT 2090#if EV_USE_PORT
764# include "ev_port.c" 2091# include "ev_port.c"
765#endif 2092#endif
766#if EV_USE_KQUEUE 2093#if EV_USE_KQUEUE
767# include "ev_kqueue.c" 2094# include "ev_kqueue.c"
… …
774#endif 2101#endif
775#if EV_USE_SELECT 2102#if EV_USE_SELECT
776# include "ev_select.c" 2103# include "ev_select.c"
777#endif 2104#endif
778 2105
779int 2106int ecb_cold
780ev_version_major (void) 2107ev_version_major (void) EV_THROW
781{ 2108{
782 return EV_VERSION_MAJOR; 2109 return EV_VERSION_MAJOR;
783} 2110}
784 2111
785int 2112int ecb_cold
786ev_version_minor (void) 2113ev_version_minor (void) EV_THROW
787{ 2114{
788 return EV_VERSION_MINOR; 2115 return EV_VERSION_MINOR;
789} 2116}
790 2117
791/* return true if we are running with elevated privileges and should ignore env variables */ 2118/* return true if we are running with elevated privileges and should ignore env variables */
792int inline_size 2119int inline_size ecb_cold
793enable_secure (void) 2120enable_secure (void)
794{ 2121{
795#ifdef _WIN32 2122#ifdef _WIN32
796 return 0; 2123 return 0;
797#else 2124#else
798 return getuid () != geteuid () 2125 return getuid () != geteuid ()
799 || getgid () != getegid (); 2126 || getgid () != getegid ();
800#endif 2127#endif
801} 2128}
802 2129
803unsigned int 2130unsigned int ecb_cold
804ev_supported_backends (void) 2131ev_supported_backends (void) EV_THROW
805{ 2132{
806 unsigned int flags = 0; 2133 unsigned int flags = 0;
807 2134
808 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2135 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
809 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2136 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
812 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2139 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
813 2140
814 return flags; 2141 return flags;
815} 2142}
816 2143
817unsigned int 2144unsigned int ecb_cold
818ev_recommended_backends (void) 2145ev_recommended_backends (void) EV_THROW
819{ 2146{
820 unsigned int flags = ev_supported_backends (); 2147 unsigned int flags = ev_supported_backends ();
821 2148
822#ifndef __NetBSD__ 2149#ifndef __NetBSD__
823 /* kqueue is borked on everything but netbsd apparently */ 2150 /* kqueue is borked on everything but netbsd apparently */
824 /* it usually doesn't work correctly on anything but sockets and pipes */ 2151 /* it usually doesn't work correctly on anything but sockets and pipes */
825 flags &= ~EVBACKEND_KQUEUE; 2152 flags &= ~EVBACKEND_KQUEUE;
826#endif 2153#endif
827#ifdef __APPLE__ 2154#ifdef __APPLE__
828 // flags &= ~EVBACKEND_KQUEUE; for documentation 2155 /* only select works correctly on that "unix-certified" platform */
829 flags &= ~EVBACKEND_POLL; 2156 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2157 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2158#endif
2159#ifdef __FreeBSD__
2160 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
830#endif 2161#endif
831 2162
832 return flags; 2163 return flags;
833} 2164}
834 2165
2166unsigned int ecb_cold
2167ev_embeddable_backends (void) EV_THROW
2168{
2169 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2170
2171 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2172 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2173 flags &= ~EVBACKEND_EPOLL;
2174
2175 return flags;
2176}
2177
835unsigned int 2178unsigned int
836ev_embeddable_backends (void) 2179ev_backend (EV_P) EV_THROW
837{ 2180{
838 return EVBACKEND_EPOLL 2181 return backend;
839 | EVBACKEND_KQUEUE
840 | EVBACKEND_PORT;
841} 2182}
842 2183
2184#if EV_FEATURE_API
843unsigned int 2185unsigned int
844ev_backend (EV_P) 2186ev_iteration (EV_P) EV_THROW
845{ 2187{
846 return backend; 2188 return loop_count;
847} 2189}
848 2190
849static void 2191unsigned int
2192ev_depth (EV_P) EV_THROW
2193{
2194 return loop_depth;
2195}
2196
2197void
2198ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2199{
2200 io_blocktime = interval;
2201}
2202
2203void
2204ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2205{
2206 timeout_blocktime = interval;
2207}
2208
2209void
2210ev_set_userdata (EV_P_ void *data) EV_THROW
2211{
2212 userdata = data;
2213}
2214
2215void *
2216ev_userdata (EV_P) EV_THROW
2217{
2218 return userdata;
2219}
2220
2221void
2222ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2223{
2224 invoke_cb = invoke_pending_cb;
2225}
2226
2227void
2228ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2229{
2230 release_cb = release;
2231 acquire_cb = acquire;
2232}
2233#endif
2234
2235/* initialise a loop structure, must be zero-initialised */
2236static void noinline ecb_cold
850loop_init (EV_P_ unsigned int flags) 2237loop_init (EV_P_ unsigned int flags) EV_THROW
851{ 2238{
852 if (!backend) 2239 if (!backend)
853 { 2240 {
2241 origflags = flags;
2242
2243#if EV_USE_REALTIME
2244 if (!have_realtime)
2245 {
2246 struct timespec ts;
2247
2248 if (!clock_gettime (CLOCK_REALTIME, &ts))
2249 have_realtime = 1;
2250 }
2251#endif
2252
854#if EV_USE_MONOTONIC 2253#if EV_USE_MONOTONIC
2254 if (!have_monotonic)
855 { 2255 {
856 struct timespec ts; 2256 struct timespec ts;
2257
857 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2258 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
858 have_monotonic = 1; 2259 have_monotonic = 1;
859 } 2260 }
860#endif 2261#endif
861 2262
862 ev_rt_now = ev_time (); 2263 /* pid check not overridable via env */
863 mn_now = get_clock (); 2264#ifndef _WIN32
864 now_floor = mn_now; 2265 if (flags & EVFLAG_FORKCHECK)
865 rtmn_diff = ev_rt_now - mn_now; 2266 curpid = getpid ();
2267#endif
866 2268
867 if (!(flags & EVFLAG_NOENV) 2269 if (!(flags & EVFLAG_NOENV)
868 && !enable_secure () 2270 && !enable_secure ()
869 && getenv ("LIBEV_FLAGS")) 2271 && getenv ("LIBEV_FLAGS"))
870 flags = atoi (getenv ("LIBEV_FLAGS")); 2272 flags = atoi (getenv ("LIBEV_FLAGS"));
871 2273
872 if (!(flags & 0x0000ffffUL)) 2274 ev_rt_now = ev_time ();
2275 mn_now = get_clock ();
2276 now_floor = mn_now;
2277 rtmn_diff = ev_rt_now - mn_now;
2278#if EV_FEATURE_API
2279 invoke_cb = ev_invoke_pending;
2280#endif
2281
2282 io_blocktime = 0.;
2283 timeout_blocktime = 0.;
2284 backend = 0;
2285 backend_fd = -1;
2286 sig_pending = 0;
2287#if EV_ASYNC_ENABLE
2288 async_pending = 0;
2289#endif
2290 pipe_write_skipped = 0;
2291 pipe_write_wanted = 0;
2292#if EV_USE_INOTIFY
2293 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2294#endif
2295#if EV_USE_SIGNALFD
2296 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2297#endif
2298
2299 if (!(flags & EVBACKEND_MASK))
873 flags |= ev_recommended_backends (); 2300 flags |= ev_recommended_backends ();
874 2301
875 backend = 0; 2302#if EV_USE_IOCP
2303 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2304#endif
876#if EV_USE_PORT 2305#if EV_USE_PORT
877 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2306 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
878#endif 2307#endif
879#if EV_USE_KQUEUE 2308#if EV_USE_KQUEUE
880 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2309 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
887#endif 2316#endif
888#if EV_USE_SELECT 2317#if EV_USE_SELECT
889 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2318 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
890#endif 2319#endif
891 2320
2321 ev_prepare_init (&pending_w, pendingcb);
2322
2323#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
892 ev_init (&sigev, sigcb); 2324 ev_init (&pipe_w, pipecb);
893 ev_set_priority (&sigev, EV_MAXPRI); 2325 ev_set_priority (&pipe_w, EV_MAXPRI);
2326#endif
894 } 2327 }
895} 2328}
896 2329
897static void 2330/* free up a loop structure */
2331void ecb_cold
898loop_destroy (EV_P) 2332ev_loop_destroy (EV_P)
899{ 2333{
900 int i; 2334 int i;
901 2335
2336#if EV_MULTIPLICITY
2337 /* mimic free (0) */
2338 if (!EV_A)
2339 return;
2340#endif
2341
2342#if EV_CLEANUP_ENABLE
2343 /* queue cleanup watchers (and execute them) */
2344 if (expect_false (cleanupcnt))
2345 {
2346 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2347 EV_INVOKE_PENDING;
2348 }
2349#endif
2350
2351#if EV_CHILD_ENABLE
2352 if (ev_is_active (&childev))
2353 {
2354 ev_ref (EV_A); /* child watcher */
2355 ev_signal_stop (EV_A_ &childev);
2356 }
2357#endif
2358
2359 if (ev_is_active (&pipe_w))
2360 {
2361 /*ev_ref (EV_A);*/
2362 /*ev_io_stop (EV_A_ &pipe_w);*/
2363
2364#if EV_USE_EVENTFD
2365 if (evfd >= 0)
2366 close (evfd);
2367#endif
2368
2369 if (evpipe [0] >= 0)
2370 {
2371 EV_WIN32_CLOSE_FD (evpipe [0]);
2372 EV_WIN32_CLOSE_FD (evpipe [1]);
2373 }
2374 }
2375
2376#if EV_USE_SIGNALFD
2377 if (ev_is_active (&sigfd_w))
2378 close (sigfd);
2379#endif
2380
2381#if EV_USE_INOTIFY
2382 if (fs_fd >= 0)
2383 close (fs_fd);
2384#endif
2385
2386 if (backend_fd >= 0)
2387 close (backend_fd);
2388
2389#if EV_USE_IOCP
2390 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2391#endif
902#if EV_USE_PORT 2392#if EV_USE_PORT
903 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2393 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
904#endif 2394#endif
905#if EV_USE_KQUEUE 2395#if EV_USE_KQUEUE
906 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2396 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
914#if EV_USE_SELECT 2404#if EV_USE_SELECT
915 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 2405 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
916#endif 2406#endif
917 2407
918 for (i = NUMPRI; i--; ) 2408 for (i = NUMPRI; i--; )
2409 {
919 array_free (pending, [i]); 2410 array_free (pending, [i]);
2411#if EV_IDLE_ENABLE
2412 array_free (idle, [i]);
2413#endif
2414 }
2415
2416 ev_free (anfds); anfds = 0; anfdmax = 0;
920 2417
921 /* have to use the microsoft-never-gets-it-right macro */ 2418 /* have to use the microsoft-never-gets-it-right macro */
2419 array_free (rfeed, EMPTY);
922 array_free (fdchange, EMPTY0); 2420 array_free (fdchange, EMPTY);
923 array_free (timer, EMPTY0); 2421 array_free (timer, EMPTY);
924#if EV_PERIODIC_ENABLE 2422#if EV_PERIODIC_ENABLE
925 array_free (periodic, EMPTY0); 2423 array_free (periodic, EMPTY);
926#endif 2424#endif
2425#if EV_FORK_ENABLE
2426 array_free (fork, EMPTY);
2427#endif
2428#if EV_CLEANUP_ENABLE
927 array_free (idle, EMPTY0); 2429 array_free (cleanup, EMPTY);
2430#endif
928 array_free (prepare, EMPTY0); 2431 array_free (prepare, EMPTY);
929 array_free (check, EMPTY0); 2432 array_free (check, EMPTY);
2433#if EV_ASYNC_ENABLE
2434 array_free (async, EMPTY);
2435#endif
930 2436
931 backend = 0; 2437 backend = 0;
932}
933 2438
934static void 2439#if EV_MULTIPLICITY
2440 if (ev_is_default_loop (EV_A))
2441#endif
2442 ev_default_loop_ptr = 0;
2443#if EV_MULTIPLICITY
2444 else
2445 ev_free (EV_A);
2446#endif
2447}
2448
2449#if EV_USE_INOTIFY
2450inline_size void infy_fork (EV_P);
2451#endif
2452
2453inline_size void
935loop_fork (EV_P) 2454loop_fork (EV_P)
936{ 2455{
937#if EV_USE_PORT 2456#if EV_USE_PORT
938 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2457 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
939#endif 2458#endif
… …
941 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 2460 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
942#endif 2461#endif
943#if EV_USE_EPOLL 2462#if EV_USE_EPOLL
944 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 2463 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
945#endif 2464#endif
2465#if EV_USE_INOTIFY
2466 infy_fork (EV_A);
2467#endif
946 2468
947 if (ev_is_active (&sigev)) 2469 if (ev_is_active (&pipe_w))
948 { 2470 {
949 /* default loop */ 2471 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
950 2472
951 ev_ref (EV_A); 2473 ev_ref (EV_A);
952 ev_io_stop (EV_A_ &sigev); 2474 ev_io_stop (EV_A_ &pipe_w);
953 close (sigpipe [0]);
954 close (sigpipe [1]);
955 2475
956 while (pipe (sigpipe)) 2476#if EV_USE_EVENTFD
957 syserr ("(libev) error creating pipe"); 2477 if (evfd >= 0)
2478 close (evfd);
2479#endif
958 2480
2481 if (evpipe [0] >= 0)
2482 {
2483 EV_WIN32_CLOSE_FD (evpipe [0]);
2484 EV_WIN32_CLOSE_FD (evpipe [1]);
2485 }
2486
2487#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
959 siginit (EV_A); 2488 evpipe_init (EV_A);
2489 /* now iterate over everything, in case we missed something */
2490 pipecb (EV_A_ &pipe_w, EV_READ);
2491#endif
960 } 2492 }
961 2493
962 postfork = 0; 2494 postfork = 0;
963} 2495}
964 2496
965#if EV_MULTIPLICITY 2497#if EV_MULTIPLICITY
2498
966struct ev_loop * 2499struct ev_loop * ecb_cold
967ev_loop_new (unsigned int flags) 2500ev_loop_new (unsigned int flags) EV_THROW
968{ 2501{
969 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2502 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
970 2503
971 memset (loop, 0, sizeof (struct ev_loop)); 2504 memset (EV_A, 0, sizeof (struct ev_loop));
972
973 loop_init (EV_A_ flags); 2505 loop_init (EV_A_ flags);
974 2506
975 if (ev_backend (EV_A)) 2507 if (ev_backend (EV_A))
976 return loop; 2508 return EV_A;
977 2509
2510 ev_free (EV_A);
978 return 0; 2511 return 0;
979} 2512}
980 2513
981void 2514#endif /* multiplicity */
982ev_loop_destroy (EV_P)
983{
984 loop_destroy (EV_A);
985 ev_free (loop);
986}
987 2515
988void 2516#if EV_VERIFY
989ev_loop_fork (EV_P) 2517static void noinline ecb_cold
2518verify_watcher (EV_P_ W w)
990{ 2519{
991 postfork = 1; 2520 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
992}
993 2521
2522 if (w->pending)
2523 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2524}
2525
2526static void noinline ecb_cold
2527verify_heap (EV_P_ ANHE *heap, int N)
2528{
2529 int i;
2530
2531 for (i = HEAP0; i < N + HEAP0; ++i)
2532 {
2533 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2534 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2535 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2536
2537 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2538 }
2539}
2540
2541static void noinline ecb_cold
2542array_verify (EV_P_ W *ws, int cnt)
2543{
2544 while (cnt--)
2545 {
2546 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2547 verify_watcher (EV_A_ ws [cnt]);
2548 }
2549}
2550#endif
2551
2552#if EV_FEATURE_API
2553void ecb_cold
2554ev_verify (EV_P) EV_THROW
2555{
2556#if EV_VERIFY
2557 int i;
2558 WL w;
2559
2560 assert (activecnt >= -1);
2561
2562 assert (fdchangemax >= fdchangecnt);
2563 for (i = 0; i < fdchangecnt; ++i)
2564 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2565
2566 assert (anfdmax >= 0);
2567 for (i = 0; i < anfdmax; ++i)
2568 for (w = anfds [i].head; w; w = w->next)
2569 {
2570 verify_watcher (EV_A_ (W)w);
2571 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2572 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2573 }
2574
2575 assert (timermax >= timercnt);
2576 verify_heap (EV_A_ timers, timercnt);
2577
2578#if EV_PERIODIC_ENABLE
2579 assert (periodicmax >= periodiccnt);
2580 verify_heap (EV_A_ periodics, periodiccnt);
2581#endif
2582
2583 for (i = NUMPRI; i--; )
2584 {
2585 assert (pendingmax [i] >= pendingcnt [i]);
2586#if EV_IDLE_ENABLE
2587 assert (idleall >= 0);
2588 assert (idlemax [i] >= idlecnt [i]);
2589 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2590#endif
2591 }
2592
2593#if EV_FORK_ENABLE
2594 assert (forkmax >= forkcnt);
2595 array_verify (EV_A_ (W *)forks, forkcnt);
2596#endif
2597
2598#if EV_CLEANUP_ENABLE
2599 assert (cleanupmax >= cleanupcnt);
2600 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2601#endif
2602
2603#if EV_ASYNC_ENABLE
2604 assert (asyncmax >= asynccnt);
2605 array_verify (EV_A_ (W *)asyncs, asynccnt);
2606#endif
2607
2608#if EV_PREPARE_ENABLE
2609 assert (preparemax >= preparecnt);
2610 array_verify (EV_A_ (W *)prepares, preparecnt);
2611#endif
2612
2613#if EV_CHECK_ENABLE
2614 assert (checkmax >= checkcnt);
2615 array_verify (EV_A_ (W *)checks, checkcnt);
2616#endif
2617
2618# if 0
2619#if EV_CHILD_ENABLE
2620 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2621 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2622#endif
2623# endif
2624#endif
2625}
994#endif 2626#endif
995 2627
996#if EV_MULTIPLICITY 2628#if EV_MULTIPLICITY
997struct ev_loop * 2629struct ev_loop * ecb_cold
998ev_default_loop_init (unsigned int flags)
999#else 2630#else
1000int 2631int
2632#endif
1001ev_default_loop (unsigned int flags) 2633ev_default_loop (unsigned int flags) EV_THROW
1002#endif
1003{ 2634{
1004 if (sigpipe [0] == sigpipe [1])
1005 if (pipe (sigpipe))
1006 return 0;
1007
1008 if (!ev_default_loop_ptr) 2635 if (!ev_default_loop_ptr)
1009 { 2636 {
1010#if EV_MULTIPLICITY 2637#if EV_MULTIPLICITY
1011 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2638 EV_P = ev_default_loop_ptr = &default_loop_struct;
1012#else 2639#else
1013 ev_default_loop_ptr = 1; 2640 ev_default_loop_ptr = 1;
1014#endif 2641#endif
1015 2642
1016 loop_init (EV_A_ flags); 2643 loop_init (EV_A_ flags);
1017 2644
1018 if (ev_backend (EV_A)) 2645 if (ev_backend (EV_A))
1019 { 2646 {
1020 siginit (EV_A); 2647#if EV_CHILD_ENABLE
1021
1022#ifndef _WIN32
1023 ev_signal_init (&childev, childcb, SIGCHLD); 2648 ev_signal_init (&childev, childcb, SIGCHLD);
1024 ev_set_priority (&childev, EV_MAXPRI); 2649 ev_set_priority (&childev, EV_MAXPRI);
1025 ev_signal_start (EV_A_ &childev); 2650 ev_signal_start (EV_A_ &childev);
1026 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2651 ev_unref (EV_A); /* child watcher should not keep loop alive */
1027#endif 2652#endif
… …
1032 2657
1033 return ev_default_loop_ptr; 2658 return ev_default_loop_ptr;
1034} 2659}
1035 2660
1036void 2661void
1037ev_default_destroy (void) 2662ev_loop_fork (EV_P) EV_THROW
1038{ 2663{
1039#if EV_MULTIPLICITY 2664 postfork = 1; /* must be in line with ev_default_fork */
1040 struct ev_loop *loop = ev_default_loop_ptr;
1041#endif
1042
1043#ifndef _WIN32
1044 ev_ref (EV_A); /* child watcher */
1045 ev_signal_stop (EV_A_ &childev);
1046#endif
1047
1048 ev_ref (EV_A); /* signal watcher */
1049 ev_io_stop (EV_A_ &sigev);
1050
1051 close (sigpipe [0]); sigpipe [0] = 0;
1052 close (sigpipe [1]); sigpipe [1] = 0;
1053
1054 loop_destroy (EV_A);
1055} 2665}
2666
2667/*****************************************************************************/
1056 2668
1057void 2669void
1058ev_default_fork (void) 2670ev_invoke (EV_P_ void *w, int revents)
1059{ 2671{
1060#if EV_MULTIPLICITY 2672 EV_CB_INVOKE ((W)w, revents);
1061 struct ev_loop *loop = ev_default_loop_ptr;
1062#endif
1063
1064 if (backend)
1065 postfork = 1;
1066} 2673}
1067 2674
1068/*****************************************************************************/ 2675unsigned int
1069 2676ev_pending_count (EV_P) EV_THROW
1070int inline_size
1071any_pending (EV_P)
1072{ 2677{
1073 int pri; 2678 int pri;
2679 unsigned int count = 0;
1074 2680
1075 for (pri = NUMPRI; pri--; ) 2681 for (pri = NUMPRI; pri--; )
1076 if (pendingcnt [pri]) 2682 count += pendingcnt [pri];
1077 return 1;
1078 2683
1079 return 0; 2684 return count;
1080} 2685}
1081 2686
1082void inline_speed 2687void noinline
1083call_pending (EV_P) 2688ev_invoke_pending (EV_P)
1084{ 2689{
1085 int pri; 2690 int pri;
1086 2691
1087 for (pri = NUMPRI; pri--; ) 2692 for (pri = NUMPRI; pri--; )
1088 while (pendingcnt [pri]) 2693 while (pendingcnt [pri])
1089 { 2694 {
1090 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2695 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1091 2696
1092 if (expect_true (p->w))
1093 {
1094 assert (("non-pending watcher on pending list", p->w->pending));
1095
1096 p->w->pending = 0; 2697 p->w->pending = 0;
1097 EV_CB_INVOKE (p->w, p->events); 2698 EV_CB_INVOKE (p->w, p->events);
1098 } 2699 EV_FREQUENT_CHECK;
1099 } 2700 }
1100} 2701}
1101 2702
1102void inline_size 2703#if EV_IDLE_ENABLE
2704/* make idle watchers pending. this handles the "call-idle */
2705/* only when higher priorities are idle" logic */
2706inline_size void
2707idle_reify (EV_P)
2708{
2709 if (expect_false (idleall))
2710 {
2711 int pri;
2712
2713 for (pri = NUMPRI; pri--; )
2714 {
2715 if (pendingcnt [pri])
2716 break;
2717
2718 if (idlecnt [pri])
2719 {
2720 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2721 break;
2722 }
2723 }
2724 }
2725}
2726#endif
2727
2728/* make timers pending */
2729inline_size void
1103timers_reify (EV_P) 2730timers_reify (EV_P)
1104{ 2731{
2732 EV_FREQUENT_CHECK;
2733
1105 while (timercnt && ((WT)timers [0])->at <= mn_now) 2734 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1106 { 2735 {
1107 ev_timer *w = timers [0]; 2736 do
1108
1109 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1110
1111 /* first reschedule or stop timer */
1112 if (w->repeat)
1113 { 2737 {
2738 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2739
2740 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2741
2742 /* first reschedule or stop timer */
2743 if (w->repeat)
2744 {
2745 ev_at (w) += w->repeat;
2746 if (ev_at (w) < mn_now)
2747 ev_at (w) = mn_now;
2748
1114 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2749 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1115 2750
1116 ((WT)w)->at += w->repeat; 2751 ANHE_at_cache (timers [HEAP0]);
1117 if (((WT)w)->at < mn_now)
1118 ((WT)w)->at = mn_now;
1119
1120 downheap ((WT *)timers, timercnt, 0); 2752 downheap (timers, timercnt, HEAP0);
2753 }
2754 else
2755 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2756
2757 EV_FREQUENT_CHECK;
2758 feed_reverse (EV_A_ (W)w);
1121 } 2759 }
1122 else 2760 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1123 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1124 2761
1125 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2762 feed_reverse_done (EV_A_ EV_TIMER);
1126 } 2763 }
1127} 2764}
1128 2765
1129#if EV_PERIODIC_ENABLE 2766#if EV_PERIODIC_ENABLE
1130void inline_size 2767
2768static void noinline
2769periodic_recalc (EV_P_ ev_periodic *w)
2770{
2771 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2772 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2773
2774 /* the above almost always errs on the low side */
2775 while (at <= ev_rt_now)
2776 {
2777 ev_tstamp nat = at + w->interval;
2778
2779 /* when resolution fails us, we use ev_rt_now */
2780 if (expect_false (nat == at))
2781 {
2782 at = ev_rt_now;
2783 break;
2784 }
2785
2786 at = nat;
2787 }
2788
2789 ev_at (w) = at;
2790}
2791
2792/* make periodics pending */
2793inline_size void
1131periodics_reify (EV_P) 2794periodics_reify (EV_P)
1132{ 2795{
2796 EV_FREQUENT_CHECK;
2797
1133 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2798 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1134 { 2799 {
1135 ev_periodic *w = periodics [0]; 2800 int feed_count = 0;
1136 2801
2802 do
2803 {
2804 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2805
1137 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2806 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1138 2807
1139 /* first reschedule or stop timer */ 2808 /* first reschedule or stop timer */
2809 if (w->reschedule_cb)
2810 {
2811 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2812
2813 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2814
2815 ANHE_at_cache (periodics [HEAP0]);
2816 downheap (periodics, periodiccnt, HEAP0);
2817 }
2818 else if (w->interval)
2819 {
2820 periodic_recalc (EV_A_ w);
2821 ANHE_at_cache (periodics [HEAP0]);
2822 downheap (periodics, periodiccnt, HEAP0);
2823 }
2824 else
2825 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2826
2827 EV_FREQUENT_CHECK;
2828 feed_reverse (EV_A_ (W)w);
2829 }
2830 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2831
2832 feed_reverse_done (EV_A_ EV_PERIODIC);
2833 }
2834}
2835
2836/* simply recalculate all periodics */
2837/* TODO: maybe ensure that at least one event happens when jumping forward? */
2838static void noinline ecb_cold
2839periodics_reschedule (EV_P)
2840{
2841 int i;
2842
2843 /* adjust periodics after time jump */
2844 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2845 {
2846 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2847
1140 if (w->reschedule_cb) 2848 if (w->reschedule_cb)
2849 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2850 else if (w->interval)
2851 periodic_recalc (EV_A_ w);
2852
2853 ANHE_at_cache (periodics [i]);
2854 }
2855
2856 reheap (periodics, periodiccnt);
2857}
2858#endif
2859
2860/* adjust all timers by a given offset */
2861static void noinline ecb_cold
2862timers_reschedule (EV_P_ ev_tstamp adjust)
2863{
2864 int i;
2865
2866 for (i = 0; i < timercnt; ++i)
2867 {
2868 ANHE *he = timers + i + HEAP0;
2869 ANHE_w (*he)->at += adjust;
2870 ANHE_at_cache (*he);
2871 }
2872}
2873
2874/* fetch new monotonic and realtime times from the kernel */
2875/* also detect if there was a timejump, and act accordingly */
2876inline_speed void
2877time_update (EV_P_ ev_tstamp max_block)
2878{
2879#if EV_USE_MONOTONIC
2880 if (expect_true (have_monotonic))
2881 {
2882 int i;
2883 ev_tstamp odiff = rtmn_diff;
2884
2885 mn_now = get_clock ();
2886
2887 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2888 /* interpolate in the meantime */
2889 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1141 { 2890 {
1142 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2891 ev_rt_now = rtmn_diff + mn_now;
1143 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2892 return;
1144 downheap ((WT *)periodics, periodiccnt, 0);
1145 } 2893 }
1146 else if (w->interval)
1147 {
1148 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1149 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1150 downheap ((WT *)periodics, periodiccnt, 0);
1151 }
1152 else
1153 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1154 2894
1155 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1156 }
1157}
1158
1159static void noinline
1160periodics_reschedule (EV_P)
1161{
1162 int i;
1163
1164 /* adjust periodics after time jump */
1165 for (i = 0; i < periodiccnt; ++i)
1166 {
1167 ev_periodic *w = periodics [i];
1168
1169 if (w->reschedule_cb)
1170 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1171 else if (w->interval)
1172 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1173 }
1174
1175 /* now rebuild the heap */
1176 for (i = periodiccnt >> 1; i--; )
1177 downheap ((WT *)periodics, periodiccnt, i);
1178}
1179#endif
1180
1181int inline_size
1182time_update_monotonic (EV_P)
1183{
1184 mn_now = get_clock ();
1185
1186 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1187 {
1188 ev_rt_now = rtmn_diff + mn_now;
1189 return 0;
1190 }
1191 else
1192 {
1193 now_floor = mn_now; 2895 now_floor = mn_now;
1194 ev_rt_now = ev_time (); 2896 ev_rt_now = ev_time ();
1195 return 1;
1196 }
1197}
1198 2897
1199void inline_size 2898 /* loop a few times, before making important decisions.
1200time_update (EV_P) 2899 * on the choice of "4": one iteration isn't enough,
1201{ 2900 * in case we get preempted during the calls to
1202 int i; 2901 * ev_time and get_clock. a second call is almost guaranteed
1203 2902 * to succeed in that case, though. and looping a few more times
1204#if EV_USE_MONOTONIC 2903 * doesn't hurt either as we only do this on time-jumps or
1205 if (expect_true (have_monotonic)) 2904 * in the unlikely event of having been preempted here.
1206 { 2905 */
1207 if (time_update_monotonic (EV_A)) 2906 for (i = 4; --i; )
1208 { 2907 {
1209 ev_tstamp odiff = rtmn_diff; 2908 ev_tstamp diff;
1210
1211 /* loop a few times, before making important decisions.
1212 * on the choice of "4": one iteration isn't enough,
1213 * in case we get preempted during the calls to
1214 * ev_time and get_clock. a second call is almost guarenteed
1215 * to succeed in that case, though. and looping a few more times
1216 * doesn't hurt either as we only do this on time-jumps or
1217 * in the unlikely event of getting preempted here.
1218 */
1219 for (i = 4; --i; )
1220 {
1221 rtmn_diff = ev_rt_now - mn_now; 2909 rtmn_diff = ev_rt_now - mn_now;
1222 2910
1223 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2911 diff = odiff - rtmn_diff;
2912
2913 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1224 return; /* all is well */ 2914 return; /* all is well */
1225 2915
1226 ev_rt_now = ev_time (); 2916 ev_rt_now = ev_time ();
1227 mn_now = get_clock (); 2917 mn_now = get_clock ();
1228 now_floor = mn_now; 2918 now_floor = mn_now;
1229 } 2919 }
1230 2920
2921 /* no timer adjustment, as the monotonic clock doesn't jump */
2922 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1231# if EV_PERIODIC_ENABLE 2923# if EV_PERIODIC_ENABLE
1232 periodics_reschedule (EV_A); 2924 periodics_reschedule (EV_A);
1233# endif 2925# endif
1234 /* no timer adjustment, as the monotonic clock doesn't jump */
1235 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1236 }
1237 } 2926 }
1238 else 2927 else
1239#endif 2928#endif
1240 { 2929 {
1241 ev_rt_now = ev_time (); 2930 ev_rt_now = ev_time ();
1242 2931
1243 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2932 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1244 { 2933 {
2934 /* adjust timers. this is easy, as the offset is the same for all of them */
2935 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1245#if EV_PERIODIC_ENABLE 2936#if EV_PERIODIC_ENABLE
1246 periodics_reschedule (EV_A); 2937 periodics_reschedule (EV_A);
1247#endif 2938#endif
1248
1249 /* adjust timers. this is easy, as the offset is the same for all */
1250 for (i = 0; i < timercnt; ++i)
1251 ((WT)timers [i])->at += ev_rt_now - mn_now;
1252 } 2939 }
1253 2940
1254 mn_now = ev_rt_now; 2941 mn_now = ev_rt_now;
1255 } 2942 }
1256} 2943}
1257 2944
1258void 2945int
1259ev_ref (EV_P)
1260{
1261 ++activecnt;
1262}
1263
1264void
1265ev_unref (EV_P)
1266{
1267 --activecnt;
1268}
1269
1270static int loop_done;
1271
1272void
1273ev_loop (EV_P_ int flags) 2946ev_run (EV_P_ int flags)
1274{ 2947{
1275 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2948#if EV_FEATURE_API
1276 ? EVUNLOOP_ONE 2949 ++loop_depth;
1277 : EVUNLOOP_CANCEL; 2950#endif
1278 2951
1279 while (activecnt) 2952 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2953
2954 loop_done = EVBREAK_CANCEL;
2955
2956 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2957
2958 do
1280 { 2959 {
2960#if EV_VERIFY >= 2
2961 ev_verify (EV_A);
2962#endif
2963
2964#ifndef _WIN32
2965 if (expect_false (curpid)) /* penalise the forking check even more */
2966 if (expect_false (getpid () != curpid))
2967 {
2968 curpid = getpid ();
2969 postfork = 1;
2970 }
2971#endif
2972
2973#if EV_FORK_ENABLE
2974 /* we might have forked, so queue fork handlers */
2975 if (expect_false (postfork))
2976 if (forkcnt)
2977 {
2978 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2979 EV_INVOKE_PENDING;
2980 }
2981#endif
2982
2983#if EV_PREPARE_ENABLE
1281 /* queue check watchers (and execute them) */ 2984 /* queue prepare watchers (and execute them) */
1282 if (expect_false (preparecnt)) 2985 if (expect_false (preparecnt))
1283 { 2986 {
1284 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2987 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1285 call_pending (EV_A); 2988 EV_INVOKE_PENDING;
1286 } 2989 }
2990#endif
2991
2992 if (expect_false (loop_done))
2993 break;
1287 2994
1288 /* we might have forked, so reify kernel state if necessary */ 2995 /* we might have forked, so reify kernel state if necessary */
1289 if (expect_false (postfork)) 2996 if (expect_false (postfork))
1290 loop_fork (EV_A); 2997 loop_fork (EV_A);
1291 2998
1292 /* update fd-related kernel structures */ 2999 /* update fd-related kernel structures */
1293 fd_reify (EV_A); 3000 fd_reify (EV_A);
1294 3001
1295 /* calculate blocking time */ 3002 /* calculate blocking time */
1296 { 3003 {
1297 double block; 3004 ev_tstamp waittime = 0.;
3005 ev_tstamp sleeptime = 0.;
1298 3006
1299 if (flags & EVLOOP_NONBLOCK || idlecnt) 3007 /* remember old timestamp for io_blocktime calculation */
1300 block = 0.; /* do not block at all */ 3008 ev_tstamp prev_mn_now = mn_now;
1301 else 3009
3010 /* update time to cancel out callback processing overhead */
3011 time_update (EV_A_ 1e100);
3012
3013 /* from now on, we want a pipe-wake-up */
3014 pipe_write_wanted = 1;
3015
3016 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3017
3018 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1302 { 3019 {
1303 /* update time to cancel out callback processing overhead */
1304#if EV_USE_MONOTONIC
1305 if (expect_true (have_monotonic))
1306 time_update_monotonic (EV_A);
1307 else
1308#endif
1309 {
1310 ev_rt_now = ev_time ();
1311 mn_now = ev_rt_now;
1312 }
1313
1314 block = MAX_BLOCKTIME; 3020 waittime = MAX_BLOCKTIME;
1315 3021
1316 if (timercnt) 3022 if (timercnt)
1317 { 3023 {
1318 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3024 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1319 if (block > to) block = to; 3025 if (waittime > to) waittime = to;
1320 } 3026 }
1321 3027
1322#if EV_PERIODIC_ENABLE 3028#if EV_PERIODIC_ENABLE
1323 if (periodiccnt) 3029 if (periodiccnt)
1324 { 3030 {
1325 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3031 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1326 if (block > to) block = to; 3032 if (waittime > to) waittime = to;
1327 } 3033 }
1328#endif 3034#endif
1329 3035
3036 /* don't let timeouts decrease the waittime below timeout_blocktime */
3037 if (expect_false (waittime < timeout_blocktime))
3038 waittime = timeout_blocktime;
3039
3040 /* at this point, we NEED to wait, so we have to ensure */
3041 /* to pass a minimum nonzero value to the backend */
3042 if (expect_false (waittime < backend_mintime))
3043 waittime = backend_mintime;
3044
3045 /* extra check because io_blocktime is commonly 0 */
1330 if (expect_false (block < 0.)) block = 0.; 3046 if (expect_false (io_blocktime))
3047 {
3048 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3049
3050 if (sleeptime > waittime - backend_mintime)
3051 sleeptime = waittime - backend_mintime;
3052
3053 if (expect_true (sleeptime > 0.))
3054 {
3055 ev_sleep (sleeptime);
3056 waittime -= sleeptime;
3057 }
3058 }
1331 } 3059 }
1332 3060
3061#if EV_FEATURE_API
3062 ++loop_count;
3063#endif
3064 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1333 backend_poll (EV_A_ block); 3065 backend_poll (EV_A_ waittime);
3066 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3067
3068 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3069
3070 if (pipe_write_skipped)
3071 {
3072 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3073 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3074 }
3075
3076
3077 /* update ev_rt_now, do magic */
3078 time_update (EV_A_ waittime + sleeptime);
1334 } 3079 }
1335
1336 /* update ev_rt_now, do magic */
1337 time_update (EV_A);
1338 3080
1339 /* queue pending timers and reschedule them */ 3081 /* queue pending timers and reschedule them */
1340 timers_reify (EV_A); /* relative timers called last */ 3082 timers_reify (EV_A); /* relative timers called last */
1341#if EV_PERIODIC_ENABLE 3083#if EV_PERIODIC_ENABLE
1342 periodics_reify (EV_A); /* absolute timers called first */ 3084 periodics_reify (EV_A); /* absolute timers called first */
1343#endif 3085#endif
1344 3086
3087#if EV_IDLE_ENABLE
1345 /* queue idle watchers unless other events are pending */ 3088 /* queue idle watchers unless other events are pending */
1346 if (idlecnt && !any_pending (EV_A)) 3089 idle_reify (EV_A);
1347 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3090#endif
1348 3091
3092#if EV_CHECK_ENABLE
1349 /* queue check watchers, to be executed first */ 3093 /* queue check watchers, to be executed first */
1350 if (expect_false (checkcnt)) 3094 if (expect_false (checkcnt))
1351 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3095 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3096#endif
1352 3097
1353 call_pending (EV_A); 3098 EV_INVOKE_PENDING;
1354
1355 if (expect_false (loop_done))
1356 break;
1357 } 3099 }
3100 while (expect_true (
3101 activecnt
3102 && !loop_done
3103 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3104 ));
1358 3105
1359 if (loop_done == EVUNLOOP_ONE) 3106 if (loop_done == EVBREAK_ONE)
1360 loop_done = EVUNLOOP_CANCEL; 3107 loop_done = EVBREAK_CANCEL;
3108
3109#if EV_FEATURE_API
3110 --loop_depth;
3111#endif
3112
3113 return activecnt;
1361} 3114}
1362 3115
1363void 3116void
1364ev_unloop (EV_P_ int how) 3117ev_break (EV_P_ int how) EV_THROW
1365{ 3118{
1366 loop_done = how; 3119 loop_done = how;
1367} 3120}
1368 3121
3122void
3123ev_ref (EV_P) EV_THROW
3124{
3125 ++activecnt;
3126}
3127
3128void
3129ev_unref (EV_P) EV_THROW
3130{
3131 --activecnt;
3132}
3133
3134void
3135ev_now_update (EV_P) EV_THROW
3136{
3137 time_update (EV_A_ 1e100);
3138}
3139
3140void
3141ev_suspend (EV_P) EV_THROW
3142{
3143 ev_now_update (EV_A);
3144}
3145
3146void
3147ev_resume (EV_P) EV_THROW
3148{
3149 ev_tstamp mn_prev = mn_now;
3150
3151 ev_now_update (EV_A);
3152 timers_reschedule (EV_A_ mn_now - mn_prev);
3153#if EV_PERIODIC_ENABLE
3154 /* TODO: really do this? */
3155 periodics_reschedule (EV_A);
3156#endif
3157}
3158
1369/*****************************************************************************/ 3159/*****************************************************************************/
3160/* singly-linked list management, used when the expected list length is short */
1370 3161
1371void inline_size 3162inline_size void
1372wlist_add (WL *head, WL elem) 3163wlist_add (WL *head, WL elem)
1373{ 3164{
1374 elem->next = *head; 3165 elem->next = *head;
1375 *head = elem; 3166 *head = elem;
1376} 3167}
1377 3168
1378void inline_size 3169inline_size void
1379wlist_del (WL *head, WL elem) 3170wlist_del (WL *head, WL elem)
1380{ 3171{
1381 while (*head) 3172 while (*head)
1382 { 3173 {
1383 if (*head == elem) 3174 if (expect_true (*head == elem))
1384 { 3175 {
1385 *head = elem->next; 3176 *head = elem->next;
1386 return; 3177 break;
1387 } 3178 }
1388 3179
1389 head = &(*head)->next; 3180 head = &(*head)->next;
1390 } 3181 }
1391} 3182}
1392 3183
1393void inline_speed 3184/* internal, faster, version of ev_clear_pending */
3185inline_speed void
1394ev_clear_pending (EV_P_ W w) 3186clear_pending (EV_P_ W w)
1395{ 3187{
1396 if (w->pending) 3188 if (w->pending)
1397 { 3189 {
1398 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3190 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1399 w->pending = 0; 3191 w->pending = 0;
1400 } 3192 }
1401} 3193}
1402 3194
1403void inline_speed 3195int
3196ev_clear_pending (EV_P_ void *w) EV_THROW
3197{
3198 W w_ = (W)w;
3199 int pending = w_->pending;
3200
3201 if (expect_true (pending))
3202 {
3203 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3204 p->w = (W)&pending_w;
3205 w_->pending = 0;
3206 return p->events;
3207 }
3208 else
3209 return 0;
3210}
3211
3212inline_size void
3213pri_adjust (EV_P_ W w)
3214{
3215 int pri = ev_priority (w);
3216 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3217 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3218 ev_set_priority (w, pri);
3219}
3220
3221inline_speed void
1404ev_start (EV_P_ W w, int active) 3222ev_start (EV_P_ W w, int active)
1405{ 3223{
1406 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3224 pri_adjust (EV_A_ w);
1407 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1408
1409 w->active = active; 3225 w->active = active;
1410 ev_ref (EV_A); 3226 ev_ref (EV_A);
1411} 3227}
1412 3228
1413void inline_size 3229inline_size void
1414ev_stop (EV_P_ W w) 3230ev_stop (EV_P_ W w)
1415{ 3231{
1416 ev_unref (EV_A); 3232 ev_unref (EV_A);
1417 w->active = 0; 3233 w->active = 0;
1418} 3234}
1419 3235
1420/*****************************************************************************/ 3236/*****************************************************************************/
1421 3237
1422void 3238void noinline
1423ev_io_start (EV_P_ ev_io *w) 3239ev_io_start (EV_P_ ev_io *w) EV_THROW
1424{ 3240{
1425 int fd = w->fd; 3241 int fd = w->fd;
1426 3242
1427 if (expect_false (ev_is_active (w))) 3243 if (expect_false (ev_is_active (w)))
1428 return; 3244 return;
1429 3245
1430 assert (("ev_io_start called with negative fd", fd >= 0)); 3246 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3247 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3248
3249 EV_FREQUENT_CHECK;
1431 3250
1432 ev_start (EV_A_ (W)w, 1); 3251 ev_start (EV_A_ (W)w, 1);
1433 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3252 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1434 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3253 wlist_add (&anfds[fd].head, (WL)w);
1435 3254
1436 fd_change (EV_A_ fd); 3255 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1437} 3256 w->events &= ~EV__IOFDSET;
1438 3257
1439void 3258 EV_FREQUENT_CHECK;
3259}
3260
3261void noinline
1440ev_io_stop (EV_P_ ev_io *w) 3262ev_io_stop (EV_P_ ev_io *w) EV_THROW
1441{ 3263{
1442 ev_clear_pending (EV_A_ (W)w); 3264 clear_pending (EV_A_ (W)w);
1443 if (expect_false (!ev_is_active (w))) 3265 if (expect_false (!ev_is_active (w)))
1444 return; 3266 return;
1445 3267
1446 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3268 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1447 3269
3270 EV_FREQUENT_CHECK;
3271
1448 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3272 wlist_del (&anfds[w->fd].head, (WL)w);
1449 ev_stop (EV_A_ (W)w); 3273 ev_stop (EV_A_ (W)w);
1450 3274
1451 fd_change (EV_A_ w->fd); 3275 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1452}
1453 3276
1454void 3277 EV_FREQUENT_CHECK;
3278}
3279
3280void noinline
1455ev_timer_start (EV_P_ ev_timer *w) 3281ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1456{ 3282{
1457 if (expect_false (ev_is_active (w))) 3283 if (expect_false (ev_is_active (w)))
1458 return; 3284 return;
1459 3285
1460 ((WT)w)->at += mn_now; 3286 ev_at (w) += mn_now;
1461 3287
1462 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3288 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1463 3289
3290 EV_FREQUENT_CHECK;
3291
3292 ++timercnt;
1464 ev_start (EV_A_ (W)w, ++timercnt); 3293 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1465 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 3294 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1466 timers [timercnt - 1] = w; 3295 ANHE_w (timers [ev_active (w)]) = (WT)w;
1467 upheap ((WT *)timers, timercnt - 1); 3296 ANHE_at_cache (timers [ev_active (w)]);
3297 upheap (timers, ev_active (w));
1468 3298
3299 EV_FREQUENT_CHECK;
3300
1469 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3301 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1470} 3302}
1471 3303
1472void 3304void noinline
1473ev_timer_stop (EV_P_ ev_timer *w) 3305ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1474{ 3306{
1475 ev_clear_pending (EV_A_ (W)w); 3307 clear_pending (EV_A_ (W)w);
1476 if (expect_false (!ev_is_active (w))) 3308 if (expect_false (!ev_is_active (w)))
1477 return; 3309 return;
1478 3310
3311 EV_FREQUENT_CHECK;
3312
3313 {
3314 int active = ev_active (w);
3315
1479 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3316 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1480 3317
3318 --timercnt;
3319
1481 if (expect_true (((W)w)->active < timercnt--)) 3320 if (expect_true (active < timercnt + HEAP0))
1482 { 3321 {
1483 timers [((W)w)->active - 1] = timers [timercnt]; 3322 timers [active] = timers [timercnt + HEAP0];
1484 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3323 adjustheap (timers, timercnt, active);
1485 } 3324 }
3325 }
1486 3326
1487 ((WT)w)->at -= mn_now; 3327 ev_at (w) -= mn_now;
1488 3328
1489 ev_stop (EV_A_ (W)w); 3329 ev_stop (EV_A_ (W)w);
1490}
1491 3330
1492void 3331 EV_FREQUENT_CHECK;
3332}
3333
3334void noinline
1493ev_timer_again (EV_P_ ev_timer *w) 3335ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1494{ 3336{
3337 EV_FREQUENT_CHECK;
3338
3339 clear_pending (EV_A_ (W)w);
3340
1495 if (ev_is_active (w)) 3341 if (ev_is_active (w))
1496 { 3342 {
1497 if (w->repeat) 3343 if (w->repeat)
1498 { 3344 {
1499 ((WT)w)->at = mn_now + w->repeat; 3345 ev_at (w) = mn_now + w->repeat;
3346 ANHE_at_cache (timers [ev_active (w)]);
1500 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3347 adjustheap (timers, timercnt, ev_active (w));
1501 } 3348 }
1502 else 3349 else
1503 ev_timer_stop (EV_A_ w); 3350 ev_timer_stop (EV_A_ w);
1504 } 3351 }
1505 else if (w->repeat) 3352 else if (w->repeat)
1506 { 3353 {
1507 w->at = w->repeat; 3354 ev_at (w) = w->repeat;
1508 ev_timer_start (EV_A_ w); 3355 ev_timer_start (EV_A_ w);
1509 } 3356 }
3357
3358 EV_FREQUENT_CHECK;
3359}
3360
3361ev_tstamp
3362ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3363{
3364 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1510} 3365}
1511 3366
1512#if EV_PERIODIC_ENABLE 3367#if EV_PERIODIC_ENABLE
1513void 3368void noinline
1514ev_periodic_start (EV_P_ ev_periodic *w) 3369ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1515{ 3370{
1516 if (expect_false (ev_is_active (w))) 3371 if (expect_false (ev_is_active (w)))
1517 return; 3372 return;
1518 3373
1519 if (w->reschedule_cb) 3374 if (w->reschedule_cb)
1520 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3375 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1521 else if (w->interval) 3376 else if (w->interval)
1522 { 3377 {
1523 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3378 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1524 /* this formula differs from the one in periodic_reify because we do not always round up */ 3379 periodic_recalc (EV_A_ w);
1525 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1526 } 3380 }
3381 else
3382 ev_at (w) = w->offset;
1527 3383
3384 EV_FREQUENT_CHECK;
3385
3386 ++periodiccnt;
1528 ev_start (EV_A_ (W)w, ++periodiccnt); 3387 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1529 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3388 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1530 periodics [periodiccnt - 1] = w; 3389 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1531 upheap ((WT *)periodics, periodiccnt - 1); 3390 ANHE_at_cache (periodics [ev_active (w)]);
3391 upheap (periodics, ev_active (w));
1532 3392
3393 EV_FREQUENT_CHECK;
3394
1533 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3395 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1534} 3396}
1535 3397
1536void 3398void noinline
1537ev_periodic_stop (EV_P_ ev_periodic *w) 3399ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1538{ 3400{
1539 ev_clear_pending (EV_A_ (W)w); 3401 clear_pending (EV_A_ (W)w);
1540 if (expect_false (!ev_is_active (w))) 3402 if (expect_false (!ev_is_active (w)))
1541 return; 3403 return;
1542 3404
3405 EV_FREQUENT_CHECK;
3406
3407 {
3408 int active = ev_active (w);
3409
1543 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3410 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1544 3411
3412 --periodiccnt;
3413
1545 if (expect_true (((W)w)->active < periodiccnt--)) 3414 if (expect_true (active < periodiccnt + HEAP0))
1546 { 3415 {
1547 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 3416 periodics [active] = periodics [periodiccnt + HEAP0];
1548 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 3417 adjustheap (periodics, periodiccnt, active);
1549 } 3418 }
3419 }
1550 3420
1551 ev_stop (EV_A_ (W)w); 3421 ev_stop (EV_A_ (W)w);
1552}
1553 3422
1554void 3423 EV_FREQUENT_CHECK;
3424}
3425
3426void noinline
1555ev_periodic_again (EV_P_ ev_periodic *w) 3427ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1556{ 3428{
1557 /* TODO: use adjustheap and recalculation */ 3429 /* TODO: use adjustheap and recalculation */
1558 ev_periodic_stop (EV_A_ w); 3430 ev_periodic_stop (EV_A_ w);
1559 ev_periodic_start (EV_A_ w); 3431 ev_periodic_start (EV_A_ w);
1560} 3432}
… …
1562 3434
1563#ifndef SA_RESTART 3435#ifndef SA_RESTART
1564# define SA_RESTART 0 3436# define SA_RESTART 0
1565#endif 3437#endif
1566 3438
1567void 3439#if EV_SIGNAL_ENABLE
3440
3441void noinline
1568ev_signal_start (EV_P_ ev_signal *w) 3442ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1569{ 3443{
1570#if EV_MULTIPLICITY
1571 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1572#endif
1573 if (expect_false (ev_is_active (w))) 3444 if (expect_false (ev_is_active (w)))
1574 return; 3445 return;
1575 3446
1576 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3447 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3448
3449#if EV_MULTIPLICITY
3450 assert (("libev: a signal must not be attached to two different loops",
3451 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3452
3453 signals [w->signum - 1].loop = EV_A;
3454#endif
3455
3456 EV_FREQUENT_CHECK;
3457
3458#if EV_USE_SIGNALFD
3459 if (sigfd == -2)
3460 {
3461 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3462 if (sigfd < 0 && errno == EINVAL)
3463 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3464
3465 if (sigfd >= 0)
3466 {
3467 fd_intern (sigfd); /* doing it twice will not hurt */
3468
3469 sigemptyset (&sigfd_set);
3470
3471 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3472 ev_set_priority (&sigfd_w, EV_MAXPRI);
3473 ev_io_start (EV_A_ &sigfd_w);
3474 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3475 }
3476 }
3477
3478 if (sigfd >= 0)
3479 {
3480 /* TODO: check .head */
3481 sigaddset (&sigfd_set, w->signum);
3482 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3483
3484 signalfd (sigfd, &sigfd_set, 0);
3485 }
3486#endif
1577 3487
1578 ev_start (EV_A_ (W)w, 1); 3488 ev_start (EV_A_ (W)w, 1);
1579 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1580 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3489 wlist_add (&signals [w->signum - 1].head, (WL)w);
1581 3490
1582 if (!((WL)w)->next) 3491 if (!((WL)w)->next)
3492# if EV_USE_SIGNALFD
3493 if (sigfd < 0) /*TODO*/
3494# endif
1583 { 3495 {
1584#if _WIN32 3496# ifdef _WIN32
3497 evpipe_init (EV_A);
3498
1585 signal (w->signum, sighandler); 3499 signal (w->signum, ev_sighandler);
1586#else 3500# else
1587 struct sigaction sa; 3501 struct sigaction sa;
3502
3503 evpipe_init (EV_A);
3504
1588 sa.sa_handler = sighandler; 3505 sa.sa_handler = ev_sighandler;
1589 sigfillset (&sa.sa_mask); 3506 sigfillset (&sa.sa_mask);
1590 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3507 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1591 sigaction (w->signum, &sa, 0); 3508 sigaction (w->signum, &sa, 0);
3509
3510 if (origflags & EVFLAG_NOSIGMASK)
3511 {
3512 sigemptyset (&sa.sa_mask);
3513 sigaddset (&sa.sa_mask, w->signum);
3514 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3515 }
1592#endif 3516#endif
1593 } 3517 }
1594}
1595 3518
1596void 3519 EV_FREQUENT_CHECK;
3520}
3521
3522void noinline
1597ev_signal_stop (EV_P_ ev_signal *w) 3523ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1598{ 3524{
1599 ev_clear_pending (EV_A_ (W)w); 3525 clear_pending (EV_A_ (W)w);
1600 if (expect_false (!ev_is_active (w))) 3526 if (expect_false (!ev_is_active (w)))
1601 return; 3527 return;
1602 3528
3529 EV_FREQUENT_CHECK;
3530
1603 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3531 wlist_del (&signals [w->signum - 1].head, (WL)w);
1604 ev_stop (EV_A_ (W)w); 3532 ev_stop (EV_A_ (W)w);
1605 3533
1606 if (!signals [w->signum - 1].head) 3534 if (!signals [w->signum - 1].head)
3535 {
3536#if EV_MULTIPLICITY
3537 signals [w->signum - 1].loop = 0; /* unattach from signal */
3538#endif
3539#if EV_USE_SIGNALFD
3540 if (sigfd >= 0)
3541 {
3542 sigset_t ss;
3543
3544 sigemptyset (&ss);
3545 sigaddset (&ss, w->signum);
3546 sigdelset (&sigfd_set, w->signum);
3547
3548 signalfd (sigfd, &sigfd_set, 0);
3549 sigprocmask (SIG_UNBLOCK, &ss, 0);
3550 }
3551 else
3552#endif
1607 signal (w->signum, SIG_DFL); 3553 signal (w->signum, SIG_DFL);
3554 }
3555
3556 EV_FREQUENT_CHECK;
1608} 3557}
3558
3559#endif
3560
3561#if EV_CHILD_ENABLE
1609 3562
1610void 3563void
1611ev_child_start (EV_P_ ev_child *w) 3564ev_child_start (EV_P_ ev_child *w) EV_THROW
1612{ 3565{
1613#if EV_MULTIPLICITY 3566#if EV_MULTIPLICITY
1614 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3567 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1615#endif 3568#endif
1616 if (expect_false (ev_is_active (w))) 3569 if (expect_false (ev_is_active (w)))
1617 return; 3570 return;
1618 3571
3572 EV_FREQUENT_CHECK;
3573
1619 ev_start (EV_A_ (W)w, 1); 3574 ev_start (EV_A_ (W)w, 1);
1620 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3575 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3576
3577 EV_FREQUENT_CHECK;
1621} 3578}
1622 3579
1623void 3580void
1624ev_child_stop (EV_P_ ev_child *w) 3581ev_child_stop (EV_P_ ev_child *w) EV_THROW
1625{ 3582{
1626 ev_clear_pending (EV_A_ (W)w); 3583 clear_pending (EV_A_ (W)w);
1627 if (expect_false (!ev_is_active (w))) 3584 if (expect_false (!ev_is_active (w)))
1628 return; 3585 return;
1629 3586
3587 EV_FREQUENT_CHECK;
3588
1630 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3589 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1631 ev_stop (EV_A_ (W)w); 3590 ev_stop (EV_A_ (W)w);
3591
3592 EV_FREQUENT_CHECK;
1632} 3593}
3594
3595#endif
1633 3596
1634#if EV_STAT_ENABLE 3597#if EV_STAT_ENABLE
1635 3598
1636# ifdef _WIN32 3599# ifdef _WIN32
3600# undef lstat
1637# define lstat(a,b) stat(a,b) 3601# define lstat(a,b) _stati64 (a,b)
1638# endif 3602# endif
1639 3603
1640#define DEF_STAT_INTERVAL 5.0074891 3604#define DEF_STAT_INTERVAL 5.0074891
3605#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1641#define MIN_STAT_INTERVAL 0.1074891 3606#define MIN_STAT_INTERVAL 0.1074891
3607
3608static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3609
3610#if EV_USE_INOTIFY
3611
3612/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3613# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3614
3615static void noinline
3616infy_add (EV_P_ ev_stat *w)
3617{
3618 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);
3619
3620 if (w->wd >= 0)
3621 {
3622 struct statfs sfs;
3623
3624 /* now local changes will be tracked by inotify, but remote changes won't */
3625 /* unless the filesystem is known to be local, we therefore still poll */
3626 /* also do poll on <2.6.25, but with normal frequency */
3627
3628 if (!fs_2625)
3629 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3630 else if (!statfs (w->path, &sfs)
3631 && (sfs.f_type == 0x1373 /* devfs */
3632 || sfs.f_type == 0xEF53 /* ext2/3 */
3633 || sfs.f_type == 0x3153464a /* jfs */
3634 || sfs.f_type == 0x52654973 /* reiser3 */
3635 || sfs.f_type == 0x01021994 /* tempfs */
3636 || sfs.f_type == 0x58465342 /* xfs */))
3637 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3638 else
3639 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3640 }
3641 else
3642 {
3643 /* can't use inotify, continue to stat */
3644 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3645
3646 /* if path is not there, monitor some parent directory for speedup hints */
3647 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3648 /* but an efficiency issue only */
3649 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3650 {
3651 char path [4096];
3652 strcpy (path, w->path);
3653
3654 do
3655 {
3656 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3657 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3658
3659 char *pend = strrchr (path, '/');
3660
3661 if (!pend || pend == path)
3662 break;
3663
3664 *pend = 0;
3665 w->wd = inotify_add_watch (fs_fd, path, mask);
3666 }
3667 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3668 }
3669 }
3670
3671 if (w->wd >= 0)
3672 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3673
3674 /* now re-arm timer, if required */
3675 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3676 ev_timer_again (EV_A_ &w->timer);
3677 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3678}
3679
3680static void noinline
3681infy_del (EV_P_ ev_stat *w)
3682{
3683 int slot;
3684 int wd = w->wd;
3685
3686 if (wd < 0)
3687 return;
3688
3689 w->wd = -2;
3690 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3691 wlist_del (&fs_hash [slot].head, (WL)w);
3692
3693 /* remove this watcher, if others are watching it, they will rearm */
3694 inotify_rm_watch (fs_fd, wd);
3695}
3696
3697static void noinline
3698infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3699{
3700 if (slot < 0)
3701 /* overflow, need to check for all hash slots */
3702 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3703 infy_wd (EV_A_ slot, wd, ev);
3704 else
3705 {
3706 WL w_;
3707
3708 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3709 {
3710 ev_stat *w = (ev_stat *)w_;
3711 w_ = w_->next; /* lets us remove this watcher and all before it */
3712
3713 if (w->wd == wd || wd == -1)
3714 {
3715 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3716 {
3717 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3718 w->wd = -1;
3719 infy_add (EV_A_ w); /* re-add, no matter what */
3720 }
3721
3722 stat_timer_cb (EV_A_ &w->timer, 0);
3723 }
3724 }
3725 }
3726}
3727
3728static void
3729infy_cb (EV_P_ ev_io *w, int revents)
3730{
3731 char buf [EV_INOTIFY_BUFSIZE];
3732 int ofs;
3733 int len = read (fs_fd, buf, sizeof (buf));
3734
3735 for (ofs = 0; ofs < len; )
3736 {
3737 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3738 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3739 ofs += sizeof (struct inotify_event) + ev->len;
3740 }
3741}
3742
3743inline_size void ecb_cold
3744ev_check_2625 (EV_P)
3745{
3746 /* kernels < 2.6.25 are borked
3747 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3748 */
3749 if (ev_linux_version () < 0x020619)
3750 return;
3751
3752 fs_2625 = 1;
3753}
3754
3755inline_size int
3756infy_newfd (void)
3757{
3758#if defined IN_CLOEXEC && defined IN_NONBLOCK
3759 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3760 if (fd >= 0)
3761 return fd;
3762#endif
3763 return inotify_init ();
3764}
3765
3766inline_size void
3767infy_init (EV_P)
3768{
3769 if (fs_fd != -2)
3770 return;
3771
3772 fs_fd = -1;
3773
3774 ev_check_2625 (EV_A);
3775
3776 fs_fd = infy_newfd ();
3777
3778 if (fs_fd >= 0)
3779 {
3780 fd_intern (fs_fd);
3781 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3782 ev_set_priority (&fs_w, EV_MAXPRI);
3783 ev_io_start (EV_A_ &fs_w);
3784 ev_unref (EV_A);
3785 }
3786}
3787
3788inline_size void
3789infy_fork (EV_P)
3790{
3791 int slot;
3792
3793 if (fs_fd < 0)
3794 return;
3795
3796 ev_ref (EV_A);
3797 ev_io_stop (EV_A_ &fs_w);
3798 close (fs_fd);
3799 fs_fd = infy_newfd ();
3800
3801 if (fs_fd >= 0)
3802 {
3803 fd_intern (fs_fd);
3804 ev_io_set (&fs_w, fs_fd, EV_READ);
3805 ev_io_start (EV_A_ &fs_w);
3806 ev_unref (EV_A);
3807 }
3808
3809 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3810 {
3811 WL w_ = fs_hash [slot].head;
3812 fs_hash [slot].head = 0;
3813
3814 while (w_)
3815 {
3816 ev_stat *w = (ev_stat *)w_;
3817 w_ = w_->next; /* lets us add this watcher */
3818
3819 w->wd = -1;
3820
3821 if (fs_fd >= 0)
3822 infy_add (EV_A_ w); /* re-add, no matter what */
3823 else
3824 {
3825 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3826 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3827 ev_timer_again (EV_A_ &w->timer);
3828 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3829 }
3830 }
3831 }
3832}
3833
3834#endif
3835
3836#ifdef _WIN32
3837# define EV_LSTAT(p,b) _stati64 (p, b)
3838#else
3839# define EV_LSTAT(p,b) lstat (p, b)
3840#endif
1642 3841
1643void 3842void
1644ev_stat_stat (EV_P_ ev_stat *w) 3843ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1645{ 3844{
1646 if (lstat (w->path, &w->attr) < 0) 3845 if (lstat (w->path, &w->attr) < 0)
1647 w->attr.st_nlink = 0; 3846 w->attr.st_nlink = 0;
1648 else if (!w->attr.st_nlink) 3847 else if (!w->attr.st_nlink)
1649 w->attr.st_nlink = 1; 3848 w->attr.st_nlink = 1;
1650} 3849}
1651 3850
1652static void 3851static void noinline
1653stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3852stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1654{ 3853{
1655 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3854 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1656 3855
1657 /* we copy this here each the time so that */ 3856 ev_statdata prev = w->attr;
1658 /* prev has the old value when the callback gets invoked */
1659 w->prev = w->attr;
1660 ev_stat_stat (EV_A_ w); 3857 ev_stat_stat (EV_A_ w);
1661 3858
1662 if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata))) 3859 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3860 if (
3861 prev.st_dev != w->attr.st_dev
3862 || prev.st_ino != w->attr.st_ino
3863 || prev.st_mode != w->attr.st_mode
3864 || prev.st_nlink != w->attr.st_nlink
3865 || prev.st_uid != w->attr.st_uid
3866 || prev.st_gid != w->attr.st_gid
3867 || prev.st_rdev != w->attr.st_rdev
3868 || prev.st_size != w->attr.st_size
3869 || prev.st_atime != w->attr.st_atime
3870 || prev.st_mtime != w->attr.st_mtime
3871 || prev.st_ctime != w->attr.st_ctime
3872 ) {
3873 /* we only update w->prev on actual differences */
3874 /* in case we test more often than invoke the callback, */
3875 /* to ensure that prev is always different to attr */
3876 w->prev = prev;
3877
3878 #if EV_USE_INOTIFY
3879 if (fs_fd >= 0)
3880 {
3881 infy_del (EV_A_ w);
3882 infy_add (EV_A_ w);
3883 ev_stat_stat (EV_A_ w); /* avoid race... */
3884 }
3885 #endif
3886
1663 ev_feed_event (EV_A_ w, EV_STAT); 3887 ev_feed_event (EV_A_ w, EV_STAT);
3888 }
1664} 3889}
1665 3890
1666void 3891void
1667ev_stat_start (EV_P_ ev_stat *w) 3892ev_stat_start (EV_P_ ev_stat *w) EV_THROW
1668{ 3893{
1669 if (expect_false (ev_is_active (w))) 3894 if (expect_false (ev_is_active (w)))
1670 return; 3895 return;
1671 3896
1672 /* since we use memcmp, we need to clear any padding data etc. */
1673 memset (&w->prev, 0, sizeof (ev_statdata));
1674 memset (&w->attr, 0, sizeof (ev_statdata));
1675
1676 ev_stat_stat (EV_A_ w); 3897 ev_stat_stat (EV_A_ w);
1677 3898
3899 if (w->interval < MIN_STAT_INTERVAL && w->interval)
1678 if (w->interval < MIN_STAT_INTERVAL) 3900 w->interval = MIN_STAT_INTERVAL;
1679 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1680 3901
1681 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3902 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
1682 ev_set_priority (&w->timer, ev_priority (w)); 3903 ev_set_priority (&w->timer, ev_priority (w));
3904
3905#if EV_USE_INOTIFY
3906 infy_init (EV_A);
3907
3908 if (fs_fd >= 0)
3909 infy_add (EV_A_ w);
3910 else
3911#endif
3912 {
1683 ev_timer_start (EV_A_ &w->timer); 3913 ev_timer_again (EV_A_ &w->timer);
3914 ev_unref (EV_A);
3915 }
1684 3916
1685 ev_start (EV_A_ (W)w, 1); 3917 ev_start (EV_A_ (W)w, 1);
3918
3919 EV_FREQUENT_CHECK;
1686} 3920}
1687 3921
1688void 3922void
1689ev_stat_stop (EV_P_ ev_stat *w) 3923ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
1690{ 3924{
1691 ev_clear_pending (EV_A_ (W)w); 3925 clear_pending (EV_A_ (W)w);
1692 if (expect_false (!ev_is_active (w))) 3926 if (expect_false (!ev_is_active (w)))
1693 return; 3927 return;
1694 3928
3929 EV_FREQUENT_CHECK;
3930
3931#if EV_USE_INOTIFY
3932 infy_del (EV_A_ w);
3933#endif
3934
3935 if (ev_is_active (&w->timer))
3936 {
3937 ev_ref (EV_A);
1695 ev_timer_stop (EV_A_ &w->timer); 3938 ev_timer_stop (EV_A_ &w->timer);
3939 }
1696 3940
1697 ev_stop (EV_A_ (W)w); 3941 ev_stop (EV_A_ (W)w);
1698}
1699#endif
1700 3942
3943 EV_FREQUENT_CHECK;
3944}
3945#endif
3946
3947#if EV_IDLE_ENABLE
1701void 3948void
1702ev_idle_start (EV_P_ ev_idle *w) 3949ev_idle_start (EV_P_ ev_idle *w) EV_THROW
1703{ 3950{
1704 if (expect_false (ev_is_active (w))) 3951 if (expect_false (ev_is_active (w)))
1705 return; 3952 return;
1706 3953
3954 pri_adjust (EV_A_ (W)w);
3955
3956 EV_FREQUENT_CHECK;
3957
3958 {
3959 int active = ++idlecnt [ABSPRI (w)];
3960
3961 ++idleall;
1707 ev_start (EV_A_ (W)w, ++idlecnt); 3962 ev_start (EV_A_ (W)w, active);
3963
1708 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 3964 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1709 idles [idlecnt - 1] = w; 3965 idles [ABSPRI (w)][active - 1] = w;
3966 }
3967
3968 EV_FREQUENT_CHECK;
1710} 3969}
1711 3970
1712void 3971void
1713ev_idle_stop (EV_P_ ev_idle *w) 3972ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
1714{ 3973{
1715 ev_clear_pending (EV_A_ (W)w); 3974 clear_pending (EV_A_ (W)w);
1716 if (expect_false (!ev_is_active (w))) 3975 if (expect_false (!ev_is_active (w)))
1717 return; 3976 return;
1718 3977
3978 EV_FREQUENT_CHECK;
3979
1719 { 3980 {
1720 int active = ((W)w)->active; 3981 int active = ev_active (w);
1721 idles [active - 1] = idles [--idlecnt]; 3982
1722 ((W)idles [active - 1])->active = active; 3983 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3984 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3985
3986 ev_stop (EV_A_ (W)w);
3987 --idleall;
1723 } 3988 }
1724 3989
1725 ev_stop (EV_A_ (W)w); 3990 EV_FREQUENT_CHECK;
1726} 3991}
3992#endif
1727 3993
3994#if EV_PREPARE_ENABLE
1728void 3995void
1729ev_prepare_start (EV_P_ ev_prepare *w) 3996ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
1730{ 3997{
1731 if (expect_false (ev_is_active (w))) 3998 if (expect_false (ev_is_active (w)))
1732 return; 3999 return;
4000
4001 EV_FREQUENT_CHECK;
1733 4002
1734 ev_start (EV_A_ (W)w, ++preparecnt); 4003 ev_start (EV_A_ (W)w, ++preparecnt);
1735 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4004 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1736 prepares [preparecnt - 1] = w; 4005 prepares [preparecnt - 1] = w;
4006
4007 EV_FREQUENT_CHECK;
1737} 4008}
1738 4009
1739void 4010void
1740ev_prepare_stop (EV_P_ ev_prepare *w) 4011ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
1741{ 4012{
1742 ev_clear_pending (EV_A_ (W)w); 4013 clear_pending (EV_A_ (W)w);
1743 if (expect_false (!ev_is_active (w))) 4014 if (expect_false (!ev_is_active (w)))
1744 return; 4015 return;
1745 4016
4017 EV_FREQUENT_CHECK;
4018
1746 { 4019 {
1747 int active = ((W)w)->active; 4020 int active = ev_active (w);
4021
1748 prepares [active - 1] = prepares [--preparecnt]; 4022 prepares [active - 1] = prepares [--preparecnt];
1749 ((W)prepares [active - 1])->active = active; 4023 ev_active (prepares [active - 1]) = active;
1750 } 4024 }
1751 4025
1752 ev_stop (EV_A_ (W)w); 4026 ev_stop (EV_A_ (W)w);
1753}
1754 4027
4028 EV_FREQUENT_CHECK;
4029}
4030#endif
4031
4032#if EV_CHECK_ENABLE
1755void 4033void
1756ev_check_start (EV_P_ ev_check *w) 4034ev_check_start (EV_P_ ev_check *w) EV_THROW
1757{ 4035{
1758 if (expect_false (ev_is_active (w))) 4036 if (expect_false (ev_is_active (w)))
1759 return; 4037 return;
4038
4039 EV_FREQUENT_CHECK;
1760 4040
1761 ev_start (EV_A_ (W)w, ++checkcnt); 4041 ev_start (EV_A_ (W)w, ++checkcnt);
1762 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4042 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1763 checks [checkcnt - 1] = w; 4043 checks [checkcnt - 1] = w;
4044
4045 EV_FREQUENT_CHECK;
1764} 4046}
1765 4047
1766void 4048void
1767ev_check_stop (EV_P_ ev_check *w) 4049ev_check_stop (EV_P_ ev_check *w) EV_THROW
1768{ 4050{
1769 ev_clear_pending (EV_A_ (W)w); 4051 clear_pending (EV_A_ (W)w);
1770 if (expect_false (!ev_is_active (w))) 4052 if (expect_false (!ev_is_active (w)))
1771 return; 4053 return;
1772 4054
4055 EV_FREQUENT_CHECK;
4056
1773 { 4057 {
1774 int active = ((W)w)->active; 4058 int active = ev_active (w);
4059
1775 checks [active - 1] = checks [--checkcnt]; 4060 checks [active - 1] = checks [--checkcnt];
1776 ((W)checks [active - 1])->active = active; 4061 ev_active (checks [active - 1]) = active;
1777 } 4062 }
1778 4063
1779 ev_stop (EV_A_ (W)w); 4064 ev_stop (EV_A_ (W)w);
4065
4066 EV_FREQUENT_CHECK;
1780} 4067}
4068#endif
1781 4069
1782#if EV_EMBED_ENABLE 4070#if EV_EMBED_ENABLE
1783void noinline 4071void noinline
1784ev_embed_sweep (EV_P_ ev_embed *w) 4072ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
1785{ 4073{
1786 ev_loop (w->loop, EVLOOP_NONBLOCK); 4074 ev_run (w->other, EVRUN_NOWAIT);
1787} 4075}
1788 4076
1789static void 4077static void
1790embed_cb (EV_P_ ev_io *io, int revents) 4078embed_io_cb (EV_P_ ev_io *io, int revents)
1791{ 4079{
1792 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4080 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
1793 4081
1794 if (ev_cb (w)) 4082 if (ev_cb (w))
1795 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4083 ev_feed_event (EV_A_ (W)w, EV_EMBED);
1796 else 4084 else
1797 ev_embed_sweep (loop, w); 4085 ev_run (w->other, EVRUN_NOWAIT);
1798} 4086}
4087
4088static void
4089embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4090{
4091 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4092
4093 {
4094 EV_P = w->other;
4095
4096 while (fdchangecnt)
4097 {
4098 fd_reify (EV_A);
4099 ev_run (EV_A_ EVRUN_NOWAIT);
4100 }
4101 }
4102}
4103
4104static void
4105embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4106{
4107 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4108
4109 ev_embed_stop (EV_A_ w);
4110
4111 {
4112 EV_P = w->other;
4113
4114 ev_loop_fork (EV_A);
4115 ev_run (EV_A_ EVRUN_NOWAIT);
4116 }
4117
4118 ev_embed_start (EV_A_ w);
4119}
4120
4121#if 0
4122static void
4123embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4124{
4125 ev_idle_stop (EV_A_ idle);
4126}
4127#endif
1799 4128
1800void 4129void
1801ev_embed_start (EV_P_ ev_embed *w) 4130ev_embed_start (EV_P_ ev_embed *w) EV_THROW
1802{ 4131{
1803 if (expect_false (ev_is_active (w))) 4132 if (expect_false (ev_is_active (w)))
1804 return; 4133 return;
1805 4134
1806 { 4135 {
1807 struct ev_loop *loop = w->loop; 4136 EV_P = w->other;
1808 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4137 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1809 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4138 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
1810 } 4139 }
4140
4141 EV_FREQUENT_CHECK;
1811 4142
1812 ev_set_priority (&w->io, ev_priority (w)); 4143 ev_set_priority (&w->io, ev_priority (w));
1813 ev_io_start (EV_A_ &w->io); 4144 ev_io_start (EV_A_ &w->io);
1814 4145
4146 ev_prepare_init (&w->prepare, embed_prepare_cb);
4147 ev_set_priority (&w->prepare, EV_MINPRI);
4148 ev_prepare_start (EV_A_ &w->prepare);
4149
4150 ev_fork_init (&w->fork, embed_fork_cb);
4151 ev_fork_start (EV_A_ &w->fork);
4152
4153 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4154
1815 ev_start (EV_A_ (W)w, 1); 4155 ev_start (EV_A_ (W)w, 1);
4156
4157 EV_FREQUENT_CHECK;
1816} 4158}
1817 4159
1818void 4160void
1819ev_embed_stop (EV_P_ ev_embed *w) 4161ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
1820{ 4162{
1821 ev_clear_pending (EV_A_ (W)w); 4163 clear_pending (EV_A_ (W)w);
1822 if (expect_false (!ev_is_active (w))) 4164 if (expect_false (!ev_is_active (w)))
1823 return; 4165 return;
1824 4166
4167 EV_FREQUENT_CHECK;
4168
1825 ev_io_stop (EV_A_ &w->io); 4169 ev_io_stop (EV_A_ &w->io);
4170 ev_prepare_stop (EV_A_ &w->prepare);
4171 ev_fork_stop (EV_A_ &w->fork);
1826 4172
1827 ev_stop (EV_A_ (W)w); 4173 ev_stop (EV_A_ (W)w);
4174
4175 EV_FREQUENT_CHECK;
4176}
4177#endif
4178
4179#if EV_FORK_ENABLE
4180void
4181ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4182{
4183 if (expect_false (ev_is_active (w)))
4184 return;
4185
4186 EV_FREQUENT_CHECK;
4187
4188 ev_start (EV_A_ (W)w, ++forkcnt);
4189 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4190 forks [forkcnt - 1] = w;
4191
4192 EV_FREQUENT_CHECK;
4193}
4194
4195void
4196ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4197{
4198 clear_pending (EV_A_ (W)w);
4199 if (expect_false (!ev_is_active (w)))
4200 return;
4201
4202 EV_FREQUENT_CHECK;
4203
4204 {
4205 int active = ev_active (w);
4206
4207 forks [active - 1] = forks [--forkcnt];
4208 ev_active (forks [active - 1]) = active;
4209 }
4210
4211 ev_stop (EV_A_ (W)w);
4212
4213 EV_FREQUENT_CHECK;
4214}
4215#endif
4216
4217#if EV_CLEANUP_ENABLE
4218void
4219ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4220{
4221 if (expect_false (ev_is_active (w)))
4222 return;
4223
4224 EV_FREQUENT_CHECK;
4225
4226 ev_start (EV_A_ (W)w, ++cleanupcnt);
4227 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4228 cleanups [cleanupcnt - 1] = w;
4229
4230 /* cleanup watchers should never keep a refcount on the loop */
4231 ev_unref (EV_A);
4232 EV_FREQUENT_CHECK;
4233}
4234
4235void
4236ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4237{
4238 clear_pending (EV_A_ (W)w);
4239 if (expect_false (!ev_is_active (w)))
4240 return;
4241
4242 EV_FREQUENT_CHECK;
4243 ev_ref (EV_A);
4244
4245 {
4246 int active = ev_active (w);
4247
4248 cleanups [active - 1] = cleanups [--cleanupcnt];
4249 ev_active (cleanups [active - 1]) = active;
4250 }
4251
4252 ev_stop (EV_A_ (W)w);
4253
4254 EV_FREQUENT_CHECK;
4255}
4256#endif
4257
4258#if EV_ASYNC_ENABLE
4259void
4260ev_async_start (EV_P_ ev_async *w) EV_THROW
4261{
4262 if (expect_false (ev_is_active (w)))
4263 return;
4264
4265 w->sent = 0;
4266
4267 evpipe_init (EV_A);
4268
4269 EV_FREQUENT_CHECK;
4270
4271 ev_start (EV_A_ (W)w, ++asynccnt);
4272 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4273 asyncs [asynccnt - 1] = w;
4274
4275 EV_FREQUENT_CHECK;
4276}
4277
4278void
4279ev_async_stop (EV_P_ ev_async *w) EV_THROW
4280{
4281 clear_pending (EV_A_ (W)w);
4282 if (expect_false (!ev_is_active (w)))
4283 return;
4284
4285 EV_FREQUENT_CHECK;
4286
4287 {
4288 int active = ev_active (w);
4289
4290 asyncs [active - 1] = asyncs [--asynccnt];
4291 ev_active (asyncs [active - 1]) = active;
4292 }
4293
4294 ev_stop (EV_A_ (W)w);
4295
4296 EV_FREQUENT_CHECK;
4297}
4298
4299void
4300ev_async_send (EV_P_ ev_async *w) EV_THROW
4301{
4302 w->sent = 1;
4303 evpipe_write (EV_A_ &async_pending);
1828} 4304}
1829#endif 4305#endif
1830 4306
1831/*****************************************************************************/ 4307/*****************************************************************************/
1832 4308
… …
1842once_cb (EV_P_ struct ev_once *once, int revents) 4318once_cb (EV_P_ struct ev_once *once, int revents)
1843{ 4319{
1844 void (*cb)(int revents, void *arg) = once->cb; 4320 void (*cb)(int revents, void *arg) = once->cb;
1845 void *arg = once->arg; 4321 void *arg = once->arg;
1846 4322
1847 ev_io_stop (EV_A_ &once->io); 4323 ev_io_stop (EV_A_ &once->io);
1848 ev_timer_stop (EV_A_ &once->to); 4324 ev_timer_stop (EV_A_ &once->to);
1849 ev_free (once); 4325 ev_free (once);
1850 4326
1851 cb (revents, arg); 4327 cb (revents, arg);
1852} 4328}
1853 4329
1854static void 4330static void
1855once_cb_io (EV_P_ ev_io *w, int revents) 4331once_cb_io (EV_P_ ev_io *w, int revents)
1856{ 4332{
1857 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4333 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4334
4335 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1858} 4336}
1859 4337
1860static void 4338static void
1861once_cb_to (EV_P_ ev_timer *w, int revents) 4339once_cb_to (EV_P_ ev_timer *w, int revents)
1862{ 4340{
1863 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4341 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4342
4343 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1864} 4344}
1865 4345
1866void 4346void
1867ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4347ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1868{ 4348{
1869 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4349 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1870 4350
1871 if (expect_false (!once)) 4351 if (expect_false (!once))
1872 { 4352 {
1873 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4353 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1874 return; 4354 return;
1875 } 4355 }
1876 4356
1877 once->cb = cb; 4357 once->cb = cb;
1878 once->arg = arg; 4358 once->arg = arg;
… …
1890 ev_timer_set (&once->to, timeout, 0.); 4370 ev_timer_set (&once->to, timeout, 0.);
1891 ev_timer_start (EV_A_ &once->to); 4371 ev_timer_start (EV_A_ &once->to);
1892 } 4372 }
1893} 4373}
1894 4374
1895#ifdef __cplusplus 4375/*****************************************************************************/
1896} 4376
4377#if EV_WALK_ENABLE
4378void ecb_cold
4379ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4380{
4381 int i, j;
4382 ev_watcher_list *wl, *wn;
4383
4384 if (types & (EV_IO | EV_EMBED))
4385 for (i = 0; i < anfdmax; ++i)
4386 for (wl = anfds [i].head; wl; )
4387 {
4388 wn = wl->next;
4389
4390#if EV_EMBED_ENABLE
4391 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4392 {
4393 if (types & EV_EMBED)
4394 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4395 }
4396 else
4397#endif
4398#if EV_USE_INOTIFY
4399 if (ev_cb ((ev_io *)wl) == infy_cb)
4400 ;
4401 else
4402#endif
4403 if ((ev_io *)wl != &pipe_w)
4404 if (types & EV_IO)
4405 cb (EV_A_ EV_IO, wl);
4406
4407 wl = wn;
4408 }
4409
4410 if (types & (EV_TIMER | EV_STAT))
4411 for (i = timercnt + HEAP0; i-- > HEAP0; )
4412#if EV_STAT_ENABLE
4413 /*TODO: timer is not always active*/
4414 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4415 {
4416 if (types & EV_STAT)
4417 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4418 }
4419 else
4420#endif
4421 if (types & EV_TIMER)
4422 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4423
4424#if EV_PERIODIC_ENABLE
4425 if (types & EV_PERIODIC)
4426 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4427 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4428#endif
4429
4430#if EV_IDLE_ENABLE
4431 if (types & EV_IDLE)
4432 for (j = NUMPRI; j--; )
4433 for (i = idlecnt [j]; i--; )
4434 cb (EV_A_ EV_IDLE, idles [j][i]);
4435#endif
4436
4437#if EV_FORK_ENABLE
4438 if (types & EV_FORK)
4439 for (i = forkcnt; i--; )
4440 if (ev_cb (forks [i]) != embed_fork_cb)
4441 cb (EV_A_ EV_FORK, forks [i]);
4442#endif
4443
4444#if EV_ASYNC_ENABLE
4445 if (types & EV_ASYNC)
4446 for (i = asynccnt; i--; )
4447 cb (EV_A_ EV_ASYNC, asyncs [i]);
4448#endif
4449
4450#if EV_PREPARE_ENABLE
4451 if (types & EV_PREPARE)
4452 for (i = preparecnt; i--; )
4453# if EV_EMBED_ENABLE
4454 if (ev_cb (prepares [i]) != embed_prepare_cb)
1897#endif 4455# endif
4456 cb (EV_A_ EV_PREPARE, prepares [i]);
4457#endif
1898 4458
4459#if EV_CHECK_ENABLE
4460 if (types & EV_CHECK)
4461 for (i = checkcnt; i--; )
4462 cb (EV_A_ EV_CHECK, checks [i]);
4463#endif
4464
4465#if EV_SIGNAL_ENABLE
4466 if (types & EV_SIGNAL)
4467 for (i = 0; i < EV_NSIG - 1; ++i)
4468 for (wl = signals [i].head; wl; )
4469 {
4470 wn = wl->next;
4471 cb (EV_A_ EV_SIGNAL, wl);
4472 wl = wn;
4473 }
4474#endif
4475
4476#if EV_CHILD_ENABLE
4477 if (types & EV_CHILD)
4478 for (i = (EV_PID_HASHSIZE); i--; )
4479 for (wl = childs [i]; wl; )
4480 {
4481 wn = wl->next;
4482 cb (EV_A_ EV_CHILD, wl);
4483 wl = wn;
4484 }
4485#endif
4486/* EV_STAT 0x00001000 /* stat data changed */
4487/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4488}
4489#endif
4490
4491#if EV_MULTIPLICITY
4492 #include "ev_wrap.h"
4493#endif
4494

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