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Comparing libev/ev.c (file contents):
Revision 1.160 by root, Sat Dec 1 22:57:20 2007 UTC vs.
Revision 1.378 by root, Mon Jun 13 09:52:36 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
30 */ 38 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 43# include EV_CONFIG_H
39# else 44# else
40# include "config.h" 45# include "config.h"
41# endif 46# endif
42 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
43# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
46# endif 71# endif
47# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
49# endif 74# endif
50# else 75# else
51# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
53# endif 78# endif
54# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
56# endif 81# endif
57# endif 82# endif
58 83
84# if HAVE_NANOSLEEP
59# ifndef EV_USE_SELECT 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif 87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
65# endif 91# endif
66 92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
67# ifndef EV_USE_POLL 94# ifndef EV_USE_SELECT
68# if HAVE_POLL && HAVE_POLL_H 95# define EV_USE_SELECT EV_FEATURE_BACKENDS
69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
73# endif 109# endif
74 110
75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
78# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
79# define EV_USE_EPOLL 0
80# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
81# endif 118# endif
82 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
83# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
89# endif 127# endif
90 128
91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
93# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
94# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
95# define EV_USE_PORT 0
96# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
97# endif 136# endif
98 137
99# ifndef EV_USE_INOTIFY
100# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
101# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
102# else
103# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
104# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
105# endif 145# endif
106 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
107#endif 154# endif
108 155
109#include <math.h> 156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
110#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
111#include <fcntl.h> 169#include <fcntl.h>
112#include <stddef.h> 170#include <stddef.h>
113 171
114#include <stdio.h> 172#include <stdio.h>
115 173
116#include <assert.h> 174#include <assert.h>
117#include <errno.h> 175#include <errno.h>
118#include <sys/types.h> 176#include <sys/types.h>
119#include <time.h> 177#include <time.h>
178#include <limits.h>
120 179
121#include <signal.h> 180#include <signal.h>
122 181
123#ifdef EV_H 182#ifdef EV_H
124# include EV_H 183# include EV_H
125#else 184#else
126# include "ev.h" 185# include "ev.h"
127#endif 186#endif
187
188EV_CPP(extern "C" {)
128 189
129#ifndef _WIN32 190#ifndef _WIN32
130# include <sys/time.h> 191# include <sys/time.h>
131# include <sys/wait.h> 192# include <sys/wait.h>
132# include <unistd.h> 193# include <unistd.h>
133#else 194#else
195# include <io.h>
134# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 197# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
138# endif 200# endif
201# undef EV_AVOID_STDIO
202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */
213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
139#endif 251# endif
140 252#endif
141/**/
142 253
143#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
144# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
259# endif
145#endif 260#endif
146 261
147#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
264#endif
265
266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
270# define EV_USE_NANOSLEEP 0
271# endif
149#endif 272#endif
150 273
151#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 276#endif
154 277
155#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
156# ifdef _WIN32 279# ifdef _WIN32
157# define EV_USE_POLL 0 280# define EV_USE_POLL 0
158# else 281# else
159# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 283# endif
161#endif 284#endif
162 285
163#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
289# else
164# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
291# endif
165#endif 292#endif
166 293
167#ifndef EV_USE_KQUEUE 294#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 295# define EV_USE_KQUEUE 0
169#endif 296#endif
… …
171#ifndef EV_USE_PORT 298#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 299# define EV_USE_PORT 0
173#endif 300#endif
174 301
175#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_INOTIFY EV_FEATURE_OS
305# else
176# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
307# endif
177#endif 308#endif
178 309
179#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 312#endif
313
314#ifndef EV_INOTIFY_HASHSIZE
315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
316#endif
317
318#ifndef EV_USE_EVENTFD
319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
320# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 321# else
183# define EV_PID_HASHSIZE 16 322# define EV_USE_EVENTFD 0
184# endif 323# endif
185#endif 324#endif
186 325
187#ifndef EV_INOTIFY_HASHSIZE 326#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 328# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 329# else
191# define EV_INOTIFY_HASHSIZE 16 330# define EV_USE_SIGNALFD 0
192# endif 331# endif
193#endif 332#endif
194 333
195/**/ 334#if 0 /* debugging */
335# define EV_VERIFY 3
336# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1
338#endif
339
340#ifndef EV_VERIFY
341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342#endif
343
344#ifndef EV_USE_4HEAP
345# define EV_USE_4HEAP EV_FEATURE_DATA
346#endif
347
348#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
364#endif
365
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
196 373
197#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
200#endif 377#endif
… …
202#ifndef CLOCK_REALTIME 379#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 380# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 381# define EV_USE_REALTIME 0
205#endif 382#endif
206 383
384#if !EV_STAT_ENABLE
385# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0
387#endif
388
389#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
392# include <sys/select.h>
393# endif
394#endif
395
396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
398# include <sys/inotify.h>
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0
403# endif
404#endif
405
207#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 407# include <winsock.h>
209#endif 408#endif
210 409
211#if !EV_STAT_ENABLE 410#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
412# include <stdint.h>
413# ifndef EFD_NONBLOCK
414# define EFD_NONBLOCK O_NONBLOCK
213#endif 415# endif
416# ifndef EFD_CLOEXEC
417# ifdef O_CLOEXEC
418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
214 425
215#if EV_USE_INOTIFY 426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
216# include <sys/inotify.h> 428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445};
217#endif 446#endif
218 447
219/**/ 448/**/
449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
456/*
457 * This is used to work around floating point rounding problems.
458 * This value is good at least till the year 4000.
459 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
220 462
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
224 465
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
468
225#if __GNUC__ >= 3 469#if __GNUC__ >= 4
226# define expect(expr,value) __builtin_expect ((expr),(value)) 470# define expect(expr,value) __builtin_expect ((expr),(value))
227# define inline_size static inline /* inline for codesize */
228# if EV_MINIMAL
229# define noinline __attribute__ ((noinline)) 471# define noinline __attribute__ ((noinline))
230# define inline_speed static noinline
231# else
232# define noinline
233# define inline_speed static inline
234# endif
235#else 472#else
236# define expect(expr,value) (expr) 473# define expect(expr,value) (expr)
237# define inline_speed static
238# define inline_size static
239# define noinline 474# define noinline
475# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
476# define inline
477# endif
240#endif 478#endif
241 479
242#define expect_false(expr) expect ((expr) != 0, 0) 480#define expect_false(expr) expect ((expr) != 0, 0)
243#define expect_true(expr) expect ((expr) != 0, 1) 481#define expect_true(expr) expect ((expr) != 0, 1)
482#define inline_size static inline
244 483
484#if EV_FEATURE_CODE
485# define inline_speed static inline
486#else
487# define inline_speed static noinline
488#endif
489
245#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 490#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
491
492#if EV_MINPRI == EV_MAXPRI
493# define ABSPRI(w) (((W)w), 0)
494#else
246#define ABSPRI(w) ((w)->priority - EV_MINPRI) 495# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
496#endif
247 497
248#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 498#define EMPTY /* required for microsofts broken pseudo-c compiler */
249#define EMPTY2(a,b) /* used to suppress some warnings */ 499#define EMPTY2(a,b) /* used to suppress some warnings */
250 500
251typedef ev_watcher *W; 501typedef ev_watcher *W;
252typedef ev_watcher_list *WL; 502typedef ev_watcher_list *WL;
253typedef ev_watcher_time *WT; 503typedef ev_watcher_time *WT;
254 504
505#define ev_active(w) ((W)(w))->active
506#define ev_at(w) ((WT)(w))->at
507
508#if EV_USE_REALTIME
509/* sig_atomic_t is used to avoid per-thread variables or locking but still */
510/* giving it a reasonably high chance of working on typical architectures */
511static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
512#endif
513
514#if EV_USE_MONOTONIC
255static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 515static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
516#endif
517
518#ifndef EV_FD_TO_WIN32_HANDLE
519# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
520#endif
521#ifndef EV_WIN32_HANDLE_TO_FD
522# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
523#endif
524#ifndef EV_WIN32_CLOSE_FD
525# define EV_WIN32_CLOSE_FD(fd) close (fd)
526#endif
256 527
257#ifdef _WIN32 528#ifdef _WIN32
258# include "ev_win32.c" 529# include "ev_win32.c"
259#endif 530#endif
260 531
261/*****************************************************************************/ 532/*****************************************************************************/
262 533
534/* define a suitable floor function (only used by periodics atm) */
535
536#if EV_USE_FLOOR
537# include <math.h>
538# define ev_floor(v) floor (v)
539#else
540
541#include <float.h>
542
543/* a floor() replacement function, should be independent of ev_tstamp type */
544static ev_tstamp noinline
545ev_floor (ev_tstamp v)
546{
547 /* the choice of shift factor is not terribly important */
548#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
549 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
550#else
551 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
552#endif
553
554 /* argument too large for an unsigned long? */
555 if (expect_false (v >= shift))
556 {
557 ev_tstamp f;
558
559 if (v == v - 1.)
560 return v; /* very large number */
561
562 f = shift * ev_floor (v * (1. / shift));
563 return f + ev_floor (v - f);
564 }
565
566 /* special treatment for negative args? */
567 if (expect_false (v < 0.))
568 {
569 ev_tstamp f = -ev_floor (-v);
570
571 return f - (f == v ? 0 : 1);
572 }
573
574 /* fits into an unsigned long */
575 return (unsigned long)v;
576}
577
578#endif
579
580/*****************************************************************************/
581
582#ifdef __linux
583# include <sys/utsname.h>
584#endif
585
586static unsigned int noinline
587ev_linux_version (void)
588{
589#ifdef __linux
590 unsigned int v = 0;
591 struct utsname buf;
592 int i;
593 char *p = buf.release;
594
595 if (uname (&buf))
596 return 0;
597
598 for (i = 3+1; --i; )
599 {
600 unsigned int c = 0;
601
602 for (;;)
603 {
604 if (*p >= '0' && *p <= '9')
605 c = c * 10 + *p++ - '0';
606 else
607 {
608 p += *p == '.';
609 break;
610 }
611 }
612
613 v = (v << 8) | c;
614 }
615
616 return v;
617#else
618 return 0;
619#endif
620}
621
622/*****************************************************************************/
623
624#if EV_AVOID_STDIO
625static void noinline
626ev_printerr (const char *msg)
627{
628 write (STDERR_FILENO, msg, strlen (msg));
629}
630#endif
631
263static void (*syserr_cb)(const char *msg); 632static void (*syserr_cb)(const char *msg);
264 633
265void 634void
266ev_set_syserr_cb (void (*cb)(const char *msg)) 635ev_set_syserr_cb (void (*cb)(const char *msg))
267{ 636{
268 syserr_cb = cb; 637 syserr_cb = cb;
269} 638}
270 639
271static void noinline 640static void noinline
272syserr (const char *msg) 641ev_syserr (const char *msg)
273{ 642{
274 if (!msg) 643 if (!msg)
275 msg = "(libev) system error"; 644 msg = "(libev) system error";
276 645
277 if (syserr_cb) 646 if (syserr_cb)
278 syserr_cb (msg); 647 syserr_cb (msg);
279 else 648 else
280 { 649 {
650#if EV_AVOID_STDIO
651 ev_printerr (msg);
652 ev_printerr (": ");
653 ev_printerr (strerror (errno));
654 ev_printerr ("\n");
655#else
281 perror (msg); 656 perror (msg);
657#endif
282 abort (); 658 abort ();
283 } 659 }
284} 660}
285 661
662static void *
663ev_realloc_emul (void *ptr, long size)
664{
665#if __GLIBC__
666 return realloc (ptr, size);
667#else
668 /* some systems, notably openbsd and darwin, fail to properly
669 * implement realloc (x, 0) (as required by both ansi c-89 and
670 * the single unix specification, so work around them here.
671 */
672
673 if (size)
674 return realloc (ptr, size);
675
676 free (ptr);
677 return 0;
678#endif
679}
680
286static void *(*alloc)(void *ptr, long size); 681static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
287 682
288void 683void
289ev_set_allocator (void *(*cb)(void *ptr, long size)) 684ev_set_allocator (void *(*cb)(void *ptr, long size))
290{ 685{
291 alloc = cb; 686 alloc = cb;
292} 687}
293 688
294inline_speed void * 689inline_speed void *
295ev_realloc (void *ptr, long size) 690ev_realloc (void *ptr, long size)
296{ 691{
297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 692 ptr = alloc (ptr, size);
298 693
299 if (!ptr && size) 694 if (!ptr && size)
300 { 695 {
696#if EV_AVOID_STDIO
697 ev_printerr ("(libev) memory allocation failed, aborting.\n");
698#else
301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 699 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
700#endif
302 abort (); 701 abort ();
303 } 702 }
304 703
305 return ptr; 704 return ptr;
306} 705}
… …
308#define ev_malloc(size) ev_realloc (0, (size)) 707#define ev_malloc(size) ev_realloc (0, (size))
309#define ev_free(ptr) ev_realloc ((ptr), 0) 708#define ev_free(ptr) ev_realloc ((ptr), 0)
310 709
311/*****************************************************************************/ 710/*****************************************************************************/
312 711
712/* set in reify when reification needed */
713#define EV_ANFD_REIFY 1
714
715/* file descriptor info structure */
313typedef struct 716typedef struct
314{ 717{
315 WL head; 718 WL head;
316 unsigned char events; 719 unsigned char events; /* the events watched for */
720 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
721 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
317 unsigned char reify; 722 unsigned char unused;
723#if EV_USE_EPOLL
724 unsigned int egen; /* generation counter to counter epoll bugs */
725#endif
318#if EV_SELECT_IS_WINSOCKET 726#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
319 SOCKET handle; 727 SOCKET handle;
320#endif 728#endif
729#if EV_USE_IOCP
730 OVERLAPPED or, ow;
731#endif
321} ANFD; 732} ANFD;
322 733
734/* stores the pending event set for a given watcher */
323typedef struct 735typedef struct
324{ 736{
325 W w; 737 W w;
326 int events; 738 int events; /* the pending event set for the given watcher */
327} ANPENDING; 739} ANPENDING;
328 740
329#if EV_USE_INOTIFY 741#if EV_USE_INOTIFY
742/* hash table entry per inotify-id */
330typedef struct 743typedef struct
331{ 744{
332 WL head; 745 WL head;
333} ANFS; 746} ANFS;
747#endif
748
749/* Heap Entry */
750#if EV_HEAP_CACHE_AT
751 /* a heap element */
752 typedef struct {
753 ev_tstamp at;
754 WT w;
755 } ANHE;
756
757 #define ANHE_w(he) (he).w /* access watcher, read-write */
758 #define ANHE_at(he) (he).at /* access cached at, read-only */
759 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
760#else
761 /* a heap element */
762 typedef WT ANHE;
763
764 #define ANHE_w(he) (he)
765 #define ANHE_at(he) (he)->at
766 #define ANHE_at_cache(he)
334#endif 767#endif
335 768
336#if EV_MULTIPLICITY 769#if EV_MULTIPLICITY
337 770
338 struct ev_loop 771 struct ev_loop
… …
357 790
358 static int ev_default_loop_ptr; 791 static int ev_default_loop_ptr;
359 792
360#endif 793#endif
361 794
795#if EV_FEATURE_API
796# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
797# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
798# define EV_INVOKE_PENDING invoke_cb (EV_A)
799#else
800# define EV_RELEASE_CB (void)0
801# define EV_ACQUIRE_CB (void)0
802# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
803#endif
804
805#define EVBREAK_RECURSE 0x80
806
362/*****************************************************************************/ 807/*****************************************************************************/
363 808
809#ifndef EV_HAVE_EV_TIME
364ev_tstamp 810ev_tstamp
365ev_time (void) 811ev_time (void)
366{ 812{
367#if EV_USE_REALTIME 813#if EV_USE_REALTIME
814 if (expect_true (have_realtime))
815 {
368 struct timespec ts; 816 struct timespec ts;
369 clock_gettime (CLOCK_REALTIME, &ts); 817 clock_gettime (CLOCK_REALTIME, &ts);
370 return ts.tv_sec + ts.tv_nsec * 1e-9; 818 return ts.tv_sec + ts.tv_nsec * 1e-9;
371#else 819 }
820#endif
821
372 struct timeval tv; 822 struct timeval tv;
373 gettimeofday (&tv, 0); 823 gettimeofday (&tv, 0);
374 return tv.tv_sec + tv.tv_usec * 1e-6; 824 return tv.tv_sec + tv.tv_usec * 1e-6;
375#endif
376} 825}
826#endif
377 827
378ev_tstamp inline_size 828inline_size ev_tstamp
379get_clock (void) 829get_clock (void)
380{ 830{
381#if EV_USE_MONOTONIC 831#if EV_USE_MONOTONIC
382 if (expect_true (have_monotonic)) 832 if (expect_true (have_monotonic))
383 { 833 {
… …
396{ 846{
397 return ev_rt_now; 847 return ev_rt_now;
398} 848}
399#endif 849#endif
400 850
401#define array_roundsize(type,n) (((n) | 4) & ~3) 851void
852ev_sleep (ev_tstamp delay)
853{
854 if (delay > 0.)
855 {
856#if EV_USE_NANOSLEEP
857 struct timespec ts;
858
859 EV_TS_SET (ts, delay);
860 nanosleep (&ts, 0);
861#elif defined(_WIN32)
862 Sleep ((unsigned long)(delay * 1e3));
863#else
864 struct timeval tv;
865
866 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
867 /* something not guaranteed by newer posix versions, but guaranteed */
868 /* by older ones */
869 EV_TV_SET (tv, delay);
870 select (0, 0, 0, 0, &tv);
871#endif
872 }
873}
874
875/*****************************************************************************/
876
877#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
878
879/* find a suitable new size for the given array, */
880/* hopefully by rounding to a nice-to-malloc size */
881inline_size int
882array_nextsize (int elem, int cur, int cnt)
883{
884 int ncur = cur + 1;
885
886 do
887 ncur <<= 1;
888 while (cnt > ncur);
889
890 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
891 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
892 {
893 ncur *= elem;
894 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
895 ncur = ncur - sizeof (void *) * 4;
896 ncur /= elem;
897 }
898
899 return ncur;
900}
901
902static noinline void *
903array_realloc (int elem, void *base, int *cur, int cnt)
904{
905 *cur = array_nextsize (elem, *cur, cnt);
906 return ev_realloc (base, elem * *cur);
907}
908
909#define array_init_zero(base,count) \
910 memset ((void *)(base), 0, sizeof (*(base)) * (count))
402 911
403#define array_needsize(type,base,cur,cnt,init) \ 912#define array_needsize(type,base,cur,cnt,init) \
404 if (expect_false ((cnt) > cur)) \ 913 if (expect_false ((cnt) > (cur))) \
405 { \ 914 { \
406 int newcnt = cur; \ 915 int ocur_ = (cur); \
407 do \ 916 (base) = (type *)array_realloc \
408 { \ 917 (sizeof (type), (base), &(cur), (cnt)); \
409 newcnt = array_roundsize (type, newcnt << 1); \ 918 init ((base) + (ocur_), (cur) - ocur_); \
410 } \
411 while ((cnt) > newcnt); \
412 \
413 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
414 init (base + cur, newcnt - cur); \
415 cur = newcnt; \
416 } 919 }
417 920
921#if 0
418#define array_slim(type,stem) \ 922#define array_slim(type,stem) \
419 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 923 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
420 { \ 924 { \
421 stem ## max = array_roundsize (stem ## cnt >> 1); \ 925 stem ## max = array_roundsize (stem ## cnt >> 1); \
422 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 926 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
423 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 927 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
424 } 928 }
929#endif
425 930
426#define array_free(stem, idx) \ 931#define array_free(stem, idx) \
427 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 932 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
428 933
429/*****************************************************************************/ 934/*****************************************************************************/
935
936/* dummy callback for pending events */
937static void noinline
938pendingcb (EV_P_ ev_prepare *w, int revents)
939{
940}
430 941
431void noinline 942void noinline
432ev_feed_event (EV_P_ void *w, int revents) 943ev_feed_event (EV_P_ void *w, int revents)
433{ 944{
434 W w_ = (W)w; 945 W w_ = (W)w;
946 int pri = ABSPRI (w_);
435 947
436 if (expect_false (w_->pending)) 948 if (expect_false (w_->pending))
949 pendings [pri][w_->pending - 1].events |= revents;
950 else
437 { 951 {
952 w_->pending = ++pendingcnt [pri];
953 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
954 pendings [pri][w_->pending - 1].w = w_;
438 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 955 pendings [pri][w_->pending - 1].events = revents;
439 return;
440 } 956 }
441
442 w_->pending = ++pendingcnt [ABSPRI (w_)];
443 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
444 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
445 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
446} 957}
447 958
448void inline_size 959inline_speed void
960feed_reverse (EV_P_ W w)
961{
962 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
963 rfeeds [rfeedcnt++] = w;
964}
965
966inline_size void
967feed_reverse_done (EV_P_ int revents)
968{
969 do
970 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
971 while (rfeedcnt);
972}
973
974inline_speed void
449queue_events (EV_P_ W *events, int eventcnt, int type) 975queue_events (EV_P_ W *events, int eventcnt, int type)
450{ 976{
451 int i; 977 int i;
452 978
453 for (i = 0; i < eventcnt; ++i) 979 for (i = 0; i < eventcnt; ++i)
454 ev_feed_event (EV_A_ events [i], type); 980 ev_feed_event (EV_A_ events [i], type);
455} 981}
456 982
457/*****************************************************************************/ 983/*****************************************************************************/
458 984
459void inline_size 985inline_speed void
460anfds_init (ANFD *base, int count)
461{
462 while (count--)
463 {
464 base->head = 0;
465 base->events = EV_NONE;
466 base->reify = 0;
467
468 ++base;
469 }
470}
471
472void inline_speed
473fd_event (EV_P_ int fd, int revents) 986fd_event_nocheck (EV_P_ int fd, int revents)
474{ 987{
475 ANFD *anfd = anfds + fd; 988 ANFD *anfd = anfds + fd;
476 ev_io *w; 989 ev_io *w;
477 990
478 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 991 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
482 if (ev) 995 if (ev)
483 ev_feed_event (EV_A_ (W)w, ev); 996 ev_feed_event (EV_A_ (W)w, ev);
484 } 997 }
485} 998}
486 999
1000/* do not submit kernel events for fds that have reify set */
1001/* because that means they changed while we were polling for new events */
1002inline_speed void
1003fd_event (EV_P_ int fd, int revents)
1004{
1005 ANFD *anfd = anfds + fd;
1006
1007 if (expect_true (!anfd->reify))
1008 fd_event_nocheck (EV_A_ fd, revents);
1009}
1010
487void 1011void
488ev_feed_fd_event (EV_P_ int fd, int revents) 1012ev_feed_fd_event (EV_P_ int fd, int revents)
489{ 1013{
1014 if (fd >= 0 && fd < anfdmax)
490 fd_event (EV_A_ fd, revents); 1015 fd_event_nocheck (EV_A_ fd, revents);
491} 1016}
492 1017
493void inline_size 1018/* make sure the external fd watch events are in-sync */
1019/* with the kernel/libev internal state */
1020inline_size void
494fd_reify (EV_P) 1021fd_reify (EV_P)
495{ 1022{
496 int i; 1023 int i;
1024
1025#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1026 for (i = 0; i < fdchangecnt; ++i)
1027 {
1028 int fd = fdchanges [i];
1029 ANFD *anfd = anfds + fd;
1030
1031 if (anfd->reify & EV__IOFDSET && anfd->head)
1032 {
1033 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1034
1035 if (handle != anfd->handle)
1036 {
1037 unsigned long arg;
1038
1039 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1040
1041 /* handle changed, but fd didn't - we need to do it in two steps */
1042 backend_modify (EV_A_ fd, anfd->events, 0);
1043 anfd->events = 0;
1044 anfd->handle = handle;
1045 }
1046 }
1047 }
1048#endif
497 1049
498 for (i = 0; i < fdchangecnt; ++i) 1050 for (i = 0; i < fdchangecnt; ++i)
499 { 1051 {
500 int fd = fdchanges [i]; 1052 int fd = fdchanges [i];
501 ANFD *anfd = anfds + fd; 1053 ANFD *anfd = anfds + fd;
502 ev_io *w; 1054 ev_io *w;
503 1055
504 int events = 0; 1056 unsigned char o_events = anfd->events;
1057 unsigned char o_reify = anfd->reify;
505 1058
506 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1059 anfd->reify = 0;
507 events |= w->events;
508 1060
509#if EV_SELECT_IS_WINSOCKET 1061 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
510 if (events)
511 { 1062 {
512 unsigned long argp; 1063 anfd->events = 0;
513 anfd->handle = _get_osfhandle (fd); 1064
514 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1065 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1066 anfd->events |= (unsigned char)w->events;
1067
1068 if (o_events != anfd->events)
1069 o_reify = EV__IOFDSET; /* actually |= */
515 } 1070 }
516#endif
517 1071
518 anfd->reify = 0; 1072 if (o_reify & EV__IOFDSET)
519
520 backend_modify (EV_A_ fd, anfd->events, events); 1073 backend_modify (EV_A_ fd, o_events, anfd->events);
521 anfd->events = events;
522 } 1074 }
523 1075
524 fdchangecnt = 0; 1076 fdchangecnt = 0;
525} 1077}
526 1078
527void inline_size 1079/* something about the given fd changed */
1080inline_size void
528fd_change (EV_P_ int fd) 1081fd_change (EV_P_ int fd, int flags)
529{ 1082{
530 if (expect_false (anfds [fd].reify)) 1083 unsigned char reify = anfds [fd].reify;
531 return;
532
533 anfds [fd].reify = 1; 1084 anfds [fd].reify |= flags;
534 1085
1086 if (expect_true (!reify))
1087 {
535 ++fdchangecnt; 1088 ++fdchangecnt;
536 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1089 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
537 fdchanges [fdchangecnt - 1] = fd; 1090 fdchanges [fdchangecnt - 1] = fd;
1091 }
538} 1092}
539 1093
540void inline_speed 1094/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1095inline_speed void
541fd_kill (EV_P_ int fd) 1096fd_kill (EV_P_ int fd)
542{ 1097{
543 ev_io *w; 1098 ev_io *w;
544 1099
545 while ((w = (ev_io *)anfds [fd].head)) 1100 while ((w = (ev_io *)anfds [fd].head))
… …
547 ev_io_stop (EV_A_ w); 1102 ev_io_stop (EV_A_ w);
548 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1103 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
549 } 1104 }
550} 1105}
551 1106
552int inline_size 1107/* check whether the given fd is actually valid, for error recovery */
1108inline_size int
553fd_valid (int fd) 1109fd_valid (int fd)
554{ 1110{
555#ifdef _WIN32 1111#ifdef _WIN32
556 return _get_osfhandle (fd) != -1; 1112 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
557#else 1113#else
558 return fcntl (fd, F_GETFD) != -1; 1114 return fcntl (fd, F_GETFD) != -1;
559#endif 1115#endif
560} 1116}
561 1117
… …
565{ 1121{
566 int fd; 1122 int fd;
567 1123
568 for (fd = 0; fd < anfdmax; ++fd) 1124 for (fd = 0; fd < anfdmax; ++fd)
569 if (anfds [fd].events) 1125 if (anfds [fd].events)
570 if (!fd_valid (fd) == -1 && errno == EBADF) 1126 if (!fd_valid (fd) && errno == EBADF)
571 fd_kill (EV_A_ fd); 1127 fd_kill (EV_A_ fd);
572} 1128}
573 1129
574/* called on ENOMEM in select/poll to kill some fds and retry */ 1130/* called on ENOMEM in select/poll to kill some fds and retry */
575static void noinline 1131static void noinline
… …
579 1135
580 for (fd = anfdmax; fd--; ) 1136 for (fd = anfdmax; fd--; )
581 if (anfds [fd].events) 1137 if (anfds [fd].events)
582 { 1138 {
583 fd_kill (EV_A_ fd); 1139 fd_kill (EV_A_ fd);
584 return; 1140 break;
585 } 1141 }
586} 1142}
587 1143
588/* usually called after fork if backend needs to re-arm all fds from scratch */ 1144/* usually called after fork if backend needs to re-arm all fds from scratch */
589static void noinline 1145static void noinline
… …
593 1149
594 for (fd = 0; fd < anfdmax; ++fd) 1150 for (fd = 0; fd < anfdmax; ++fd)
595 if (anfds [fd].events) 1151 if (anfds [fd].events)
596 { 1152 {
597 anfds [fd].events = 0; 1153 anfds [fd].events = 0;
598 fd_change (EV_A_ fd); 1154 anfds [fd].emask = 0;
1155 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
599 } 1156 }
600} 1157}
601 1158
602/*****************************************************************************/ 1159/* used to prepare libev internal fd's */
603 1160/* this is not fork-safe */
604void inline_speed 1161inline_speed void
605upheap (WT *heap, int k)
606{
607 WT w = heap [k];
608
609 while (k && heap [k >> 1]->at > w->at)
610 {
611 heap [k] = heap [k >> 1];
612 ((W)heap [k])->active = k + 1;
613 k >>= 1;
614 }
615
616 heap [k] = w;
617 ((W)heap [k])->active = k + 1;
618
619}
620
621void inline_speed
622downheap (WT *heap, int N, int k)
623{
624 WT w = heap [k];
625
626 while (k < (N >> 1))
627 {
628 int j = k << 1;
629
630 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
631 ++j;
632
633 if (w->at <= heap [j]->at)
634 break;
635
636 heap [k] = heap [j];
637 ((W)heap [k])->active = k + 1;
638 k = j;
639 }
640
641 heap [k] = w;
642 ((W)heap [k])->active = k + 1;
643}
644
645void inline_size
646adjustheap (WT *heap, int N, int k)
647{
648 upheap (heap, k);
649 downheap (heap, N, k);
650}
651
652/*****************************************************************************/
653
654typedef struct
655{
656 WL head;
657 sig_atomic_t volatile gotsig;
658} ANSIG;
659
660static ANSIG *signals;
661static int signalmax;
662
663static int sigpipe [2];
664static sig_atomic_t volatile gotsig;
665static ev_io sigev;
666
667void inline_size
668signals_init (ANSIG *base, int count)
669{
670 while (count--)
671 {
672 base->head = 0;
673 base->gotsig = 0;
674
675 ++base;
676 }
677}
678
679static void
680sighandler (int signum)
681{
682#if _WIN32
683 signal (signum, sighandler);
684#endif
685
686 signals [signum - 1].gotsig = 1;
687
688 if (!gotsig)
689 {
690 int old_errno = errno;
691 gotsig = 1;
692 write (sigpipe [1], &signum, 1);
693 errno = old_errno;
694 }
695}
696
697void noinline
698ev_feed_signal_event (EV_P_ int signum)
699{
700 WL w;
701
702#if EV_MULTIPLICITY
703 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
704#endif
705
706 --signum;
707
708 if (signum < 0 || signum >= signalmax)
709 return;
710
711 signals [signum].gotsig = 0;
712
713 for (w = signals [signum].head; w; w = w->next)
714 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
715}
716
717static void
718sigcb (EV_P_ ev_io *iow, int revents)
719{
720 int signum;
721
722 read (sigpipe [0], &revents, 1);
723 gotsig = 0;
724
725 for (signum = signalmax; signum--; )
726 if (signals [signum].gotsig)
727 ev_feed_signal_event (EV_A_ signum + 1);
728}
729
730void inline_size
731fd_intern (int fd) 1162fd_intern (int fd)
732{ 1163{
733#ifdef _WIN32 1164#ifdef _WIN32
734 int arg = 1; 1165 unsigned long arg = 1;
735 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1166 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
736#else 1167#else
737 fcntl (fd, F_SETFD, FD_CLOEXEC); 1168 fcntl (fd, F_SETFD, FD_CLOEXEC);
738 fcntl (fd, F_SETFL, O_NONBLOCK); 1169 fcntl (fd, F_SETFL, O_NONBLOCK);
739#endif 1170#endif
740} 1171}
741 1172
1173/*****************************************************************************/
1174
1175/*
1176 * the heap functions want a real array index. array index 0 is guaranteed to not
1177 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1178 * the branching factor of the d-tree.
1179 */
1180
1181/*
1182 * at the moment we allow libev the luxury of two heaps,
1183 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1184 * which is more cache-efficient.
1185 * the difference is about 5% with 50000+ watchers.
1186 */
1187#if EV_USE_4HEAP
1188
1189#define DHEAP 4
1190#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1191#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1192#define UPHEAP_DONE(p,k) ((p) == (k))
1193
1194/* away from the root */
1195inline_speed void
1196downheap (ANHE *heap, int N, int k)
1197{
1198 ANHE he = heap [k];
1199 ANHE *E = heap + N + HEAP0;
1200
1201 for (;;)
1202 {
1203 ev_tstamp minat;
1204 ANHE *minpos;
1205 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1206
1207 /* find minimum child */
1208 if (expect_true (pos + DHEAP - 1 < E))
1209 {
1210 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1211 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1212 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1213 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1214 }
1215 else if (pos < E)
1216 {
1217 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1218 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1219 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1220 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1221 }
1222 else
1223 break;
1224
1225 if (ANHE_at (he) <= minat)
1226 break;
1227
1228 heap [k] = *minpos;
1229 ev_active (ANHE_w (*minpos)) = k;
1230
1231 k = minpos - heap;
1232 }
1233
1234 heap [k] = he;
1235 ev_active (ANHE_w (he)) = k;
1236}
1237
1238#else /* 4HEAP */
1239
1240#define HEAP0 1
1241#define HPARENT(k) ((k) >> 1)
1242#define UPHEAP_DONE(p,k) (!(p))
1243
1244/* away from the root */
1245inline_speed void
1246downheap (ANHE *heap, int N, int k)
1247{
1248 ANHE he = heap [k];
1249
1250 for (;;)
1251 {
1252 int c = k << 1;
1253
1254 if (c >= N + HEAP0)
1255 break;
1256
1257 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1258 ? 1 : 0;
1259
1260 if (ANHE_at (he) <= ANHE_at (heap [c]))
1261 break;
1262
1263 heap [k] = heap [c];
1264 ev_active (ANHE_w (heap [k])) = k;
1265
1266 k = c;
1267 }
1268
1269 heap [k] = he;
1270 ev_active (ANHE_w (he)) = k;
1271}
1272#endif
1273
1274/* towards the root */
1275inline_speed void
1276upheap (ANHE *heap, int k)
1277{
1278 ANHE he = heap [k];
1279
1280 for (;;)
1281 {
1282 int p = HPARENT (k);
1283
1284 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1285 break;
1286
1287 heap [k] = heap [p];
1288 ev_active (ANHE_w (heap [k])) = k;
1289 k = p;
1290 }
1291
1292 heap [k] = he;
1293 ev_active (ANHE_w (he)) = k;
1294}
1295
1296/* move an element suitably so it is in a correct place */
1297inline_size void
1298adjustheap (ANHE *heap, int N, int k)
1299{
1300 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1301 upheap (heap, k);
1302 else
1303 downheap (heap, N, k);
1304}
1305
1306/* rebuild the heap: this function is used only once and executed rarely */
1307inline_size void
1308reheap (ANHE *heap, int N)
1309{
1310 int i;
1311
1312 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1313 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1314 for (i = 0; i < N; ++i)
1315 upheap (heap, i + HEAP0);
1316}
1317
1318/*****************************************************************************/
1319
1320/* associate signal watchers to a signal signal */
1321typedef struct
1322{
1323 EV_ATOMIC_T pending;
1324#if EV_MULTIPLICITY
1325 EV_P;
1326#endif
1327 WL head;
1328} ANSIG;
1329
1330static ANSIG signals [EV_NSIG - 1];
1331
1332/*****************************************************************************/
1333
1334#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1335
742static void noinline 1336static void noinline
743siginit (EV_P) 1337evpipe_init (EV_P)
744{ 1338{
1339 if (!ev_is_active (&pipe_w))
1340 {
1341# if EV_USE_EVENTFD
1342 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1343 if (evfd < 0 && errno == EINVAL)
1344 evfd = eventfd (0, 0);
1345
1346 if (evfd >= 0)
1347 {
1348 evpipe [0] = -1;
1349 fd_intern (evfd); /* doing it twice doesn't hurt */
1350 ev_io_set (&pipe_w, evfd, EV_READ);
1351 }
1352 else
1353# endif
1354 {
1355 while (pipe (evpipe))
1356 ev_syserr ("(libev) error creating signal/async pipe");
1357
745 fd_intern (sigpipe [0]); 1358 fd_intern (evpipe [0]);
746 fd_intern (sigpipe [1]); 1359 fd_intern (evpipe [1]);
1360 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1361 }
747 1362
748 ev_io_set (&sigev, sigpipe [0], EV_READ);
749 ev_io_start (EV_A_ &sigev); 1363 ev_io_start (EV_A_ &pipe_w);
750 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1364 ev_unref (EV_A); /* watcher should not keep loop alive */
1365 }
1366}
1367
1368inline_size void
1369evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1370{
1371 if (!*flag)
1372 {
1373 *flag = 1;
1374
1375 pipe_write_skipped = 1;
1376
1377 if (pipe_write_wanted)
1378 {
1379 int old_errno = errno; /* save errno because write will clobber it */
1380 char dummy;
1381
1382 pipe_write_skipped = 0;
1383
1384#if EV_USE_EVENTFD
1385 if (evfd >= 0)
1386 {
1387 uint64_t counter = 1;
1388 write (evfd, &counter, sizeof (uint64_t));
1389 }
1390 else
1391#endif
1392 {
1393 /* win32 people keep sending patches that change this write() to send() */
1394 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1395 /* so when you think this write should be a send instead, please find out */
1396 /* where your send() is from - it's definitely not the microsoft send, and */
1397 /* tell me. thank you. */
1398 write (evpipe [1], &dummy, 1);
1399 }
1400
1401 errno = old_errno;
1402 }
1403 }
1404}
1405
1406/* called whenever the libev signal pipe */
1407/* got some events (signal, async) */
1408static void
1409pipecb (EV_P_ ev_io *iow, int revents)
1410{
1411 int i;
1412
1413 if (revents & EV_READ)
1414 {
1415#if EV_USE_EVENTFD
1416 if (evfd >= 0)
1417 {
1418 uint64_t counter;
1419 read (evfd, &counter, sizeof (uint64_t));
1420 }
1421 else
1422#endif
1423 {
1424 char dummy;
1425 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1426 read (evpipe [0], &dummy, 1);
1427 }
1428 }
1429
1430 pipe_write_skipped = 0;
1431
1432#if EV_SIGNAL_ENABLE
1433 if (sig_pending)
1434 {
1435 sig_pending = 0;
1436
1437 for (i = EV_NSIG - 1; i--; )
1438 if (expect_false (signals [i].pending))
1439 ev_feed_signal_event (EV_A_ i + 1);
1440 }
1441#endif
1442
1443#if EV_ASYNC_ENABLE
1444 if (async_pending)
1445 {
1446 async_pending = 0;
1447
1448 for (i = asynccnt; i--; )
1449 if (asyncs [i]->sent)
1450 {
1451 asyncs [i]->sent = 0;
1452 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1453 }
1454 }
1455#endif
751} 1456}
752 1457
753/*****************************************************************************/ 1458/*****************************************************************************/
754 1459
755static ev_child *childs [EV_PID_HASHSIZE]; 1460void
1461ev_feed_signal (int signum)
1462{
1463#if EV_MULTIPLICITY
1464 EV_P = signals [signum - 1].loop;
756 1465
1466 if (!EV_A)
1467 return;
1468#endif
1469
1470 evpipe_init (EV_A);
1471
1472 signals [signum - 1].pending = 1;
1473 evpipe_write (EV_A_ &sig_pending);
1474}
1475
1476static void
1477ev_sighandler (int signum)
1478{
757#ifndef _WIN32 1479#ifdef _WIN32
1480 signal (signum, ev_sighandler);
1481#endif
1482
1483 ev_feed_signal (signum);
1484}
1485
1486void noinline
1487ev_feed_signal_event (EV_P_ int signum)
1488{
1489 WL w;
1490
1491 if (expect_false (signum <= 0 || signum > EV_NSIG))
1492 return;
1493
1494 --signum;
1495
1496#if EV_MULTIPLICITY
1497 /* it is permissible to try to feed a signal to the wrong loop */
1498 /* or, likely more useful, feeding a signal nobody is waiting for */
1499
1500 if (expect_false (signals [signum].loop != EV_A))
1501 return;
1502#endif
1503
1504 signals [signum].pending = 0;
1505
1506 for (w = signals [signum].head; w; w = w->next)
1507 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1508}
1509
1510#if EV_USE_SIGNALFD
1511static void
1512sigfdcb (EV_P_ ev_io *iow, int revents)
1513{
1514 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1515
1516 for (;;)
1517 {
1518 ssize_t res = read (sigfd, si, sizeof (si));
1519
1520 /* not ISO-C, as res might be -1, but works with SuS */
1521 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1522 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1523
1524 if (res < (ssize_t)sizeof (si))
1525 break;
1526 }
1527}
1528#endif
1529
1530#endif
1531
1532/*****************************************************************************/
1533
1534#if EV_CHILD_ENABLE
1535static WL childs [EV_PID_HASHSIZE];
758 1536
759static ev_signal childev; 1537static ev_signal childev;
760 1538
761void inline_speed 1539#ifndef WIFCONTINUED
1540# define WIFCONTINUED(status) 0
1541#endif
1542
1543/* handle a single child status event */
1544inline_speed void
762child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1545child_reap (EV_P_ int chain, int pid, int status)
763{ 1546{
764 ev_child *w; 1547 ev_child *w;
1548 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
765 1549
766 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1550 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1551 {
767 if (w->pid == pid || !w->pid) 1552 if ((w->pid == pid || !w->pid)
1553 && (!traced || (w->flags & 1)))
768 { 1554 {
769 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 1555 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
770 w->rpid = pid; 1556 w->rpid = pid;
771 w->rstatus = status; 1557 w->rstatus = status;
772 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1558 ev_feed_event (EV_A_ (W)w, EV_CHILD);
773 } 1559 }
1560 }
774} 1561}
775 1562
776#ifndef WCONTINUED 1563#ifndef WCONTINUED
777# define WCONTINUED 0 1564# define WCONTINUED 0
778#endif 1565#endif
779 1566
1567/* called on sigchld etc., calls waitpid */
780static void 1568static void
781childcb (EV_P_ ev_signal *sw, int revents) 1569childcb (EV_P_ ev_signal *sw, int revents)
782{ 1570{
783 int pid, status; 1571 int pid, status;
784 1572
… …
787 if (!WCONTINUED 1575 if (!WCONTINUED
788 || errno != EINVAL 1576 || errno != EINVAL
789 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1577 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
790 return; 1578 return;
791 1579
792 /* make sure we are called again until all childs have been reaped */ 1580 /* make sure we are called again until all children have been reaped */
793 /* we need to do it this way so that the callback gets called before we continue */ 1581 /* we need to do it this way so that the callback gets called before we continue */
794 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1582 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
795 1583
796 child_reap (EV_A_ sw, pid, pid, status); 1584 child_reap (EV_A_ pid, pid, status);
797 if (EV_PID_HASHSIZE > 1) 1585 if ((EV_PID_HASHSIZE) > 1)
798 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1586 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
799} 1587}
800 1588
801#endif 1589#endif
802 1590
803/*****************************************************************************/ 1591/*****************************************************************************/
804 1592
1593#if EV_USE_IOCP
1594# include "ev_iocp.c"
1595#endif
805#if EV_USE_PORT 1596#if EV_USE_PORT
806# include "ev_port.c" 1597# include "ev_port.c"
807#endif 1598#endif
808#if EV_USE_KQUEUE 1599#if EV_USE_KQUEUE
809# include "ev_kqueue.c" 1600# include "ev_kqueue.c"
… …
865 /* kqueue is borked on everything but netbsd apparently */ 1656 /* kqueue is borked on everything but netbsd apparently */
866 /* it usually doesn't work correctly on anything but sockets and pipes */ 1657 /* it usually doesn't work correctly on anything but sockets and pipes */
867 flags &= ~EVBACKEND_KQUEUE; 1658 flags &= ~EVBACKEND_KQUEUE;
868#endif 1659#endif
869#ifdef __APPLE__ 1660#ifdef __APPLE__
870 // flags &= ~EVBACKEND_KQUEUE; for documentation 1661 /* only select works correctly on that "unix-certified" platform */
871 flags &= ~EVBACKEND_POLL; 1662 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1663 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1664#endif
1665#ifdef __FreeBSD__
1666 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
872#endif 1667#endif
873 1668
874 return flags; 1669 return flags;
875} 1670}
876 1671
877unsigned int 1672unsigned int
878ev_embeddable_backends (void) 1673ev_embeddable_backends (void)
879{ 1674{
880 return EVBACKEND_EPOLL 1675 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
881 | EVBACKEND_KQUEUE 1676
882 | EVBACKEND_PORT; 1677 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1678 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1679 flags &= ~EVBACKEND_EPOLL;
1680
1681 return flags;
883} 1682}
884 1683
885unsigned int 1684unsigned int
886ev_backend (EV_P) 1685ev_backend (EV_P)
887{ 1686{
888 return backend; 1687 return backend;
889} 1688}
890 1689
1690#if EV_FEATURE_API
1691unsigned int
1692ev_iteration (EV_P)
1693{
1694 return loop_count;
1695}
1696
1697unsigned int
1698ev_depth (EV_P)
1699{
1700 return loop_depth;
1701}
1702
1703void
1704ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1705{
1706 io_blocktime = interval;
1707}
1708
1709void
1710ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1711{
1712 timeout_blocktime = interval;
1713}
1714
1715void
1716ev_set_userdata (EV_P_ void *data)
1717{
1718 userdata = data;
1719}
1720
1721void *
1722ev_userdata (EV_P)
1723{
1724 return userdata;
1725}
1726
1727void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1728{
1729 invoke_cb = invoke_pending_cb;
1730}
1731
1732void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1733{
1734 release_cb = release;
1735 acquire_cb = acquire;
1736}
1737#endif
1738
1739/* initialise a loop structure, must be zero-initialised */
891static void noinline 1740static void noinline
892loop_init (EV_P_ unsigned int flags) 1741loop_init (EV_P_ unsigned int flags)
893{ 1742{
894 if (!backend) 1743 if (!backend)
895 { 1744 {
1745 origflags = flags;
1746
1747#if EV_USE_REALTIME
1748 if (!have_realtime)
1749 {
1750 struct timespec ts;
1751
1752 if (!clock_gettime (CLOCK_REALTIME, &ts))
1753 have_realtime = 1;
1754 }
1755#endif
1756
896#if EV_USE_MONOTONIC 1757#if EV_USE_MONOTONIC
1758 if (!have_monotonic)
897 { 1759 {
898 struct timespec ts; 1760 struct timespec ts;
1761
899 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1762 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
900 have_monotonic = 1; 1763 have_monotonic = 1;
901 } 1764 }
902#endif 1765#endif
903
904 ev_rt_now = ev_time ();
905 mn_now = get_clock ();
906 now_floor = mn_now;
907 rtmn_diff = ev_rt_now - mn_now;
908 1766
909 /* pid check not overridable via env */ 1767 /* pid check not overridable via env */
910#ifndef _WIN32 1768#ifndef _WIN32
911 if (flags & EVFLAG_FORKCHECK) 1769 if (flags & EVFLAG_FORKCHECK)
912 curpid = getpid (); 1770 curpid = getpid ();
… …
915 if (!(flags & EVFLAG_NOENV) 1773 if (!(flags & EVFLAG_NOENV)
916 && !enable_secure () 1774 && !enable_secure ()
917 && getenv ("LIBEV_FLAGS")) 1775 && getenv ("LIBEV_FLAGS"))
918 flags = atoi (getenv ("LIBEV_FLAGS")); 1776 flags = atoi (getenv ("LIBEV_FLAGS"));
919 1777
920 if (!(flags & 0x0000ffffUL)) 1778 ev_rt_now = ev_time ();
1779 mn_now = get_clock ();
1780 now_floor = mn_now;
1781 rtmn_diff = ev_rt_now - mn_now;
1782#if EV_FEATURE_API
1783 invoke_cb = ev_invoke_pending;
1784#endif
1785
1786 io_blocktime = 0.;
1787 timeout_blocktime = 0.;
1788 backend = 0;
1789 backend_fd = -1;
1790 sig_pending = 0;
1791#if EV_ASYNC_ENABLE
1792 async_pending = 0;
1793#endif
1794 pipe_write_skipped = 0;
1795 pipe_write_wanted = 0;
1796#if EV_USE_INOTIFY
1797 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1798#endif
1799#if EV_USE_SIGNALFD
1800 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1801#endif
1802
1803 if (!(flags & EVBACKEND_MASK))
921 flags |= ev_recommended_backends (); 1804 flags |= ev_recommended_backends ();
922 1805
923 backend = 0;
924 backend_fd = -1;
925#if EV_USE_INOTIFY 1806#if EV_USE_IOCP
926 fs_fd = -2; 1807 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
927#endif 1808#endif
928
929#if EV_USE_PORT 1809#if EV_USE_PORT
930 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1810 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
931#endif 1811#endif
932#if EV_USE_KQUEUE 1812#if EV_USE_KQUEUE
933 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1813 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
940#endif 1820#endif
941#if EV_USE_SELECT 1821#if EV_USE_SELECT
942 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1822 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
943#endif 1823#endif
944 1824
1825 ev_prepare_init (&pending_w, pendingcb);
1826
1827#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
945 ev_init (&sigev, sigcb); 1828 ev_init (&pipe_w, pipecb);
946 ev_set_priority (&sigev, EV_MAXPRI); 1829 ev_set_priority (&pipe_w, EV_MAXPRI);
1830#endif
947 } 1831 }
948} 1832}
949 1833
950static void noinline 1834/* free up a loop structure */
1835void
951loop_destroy (EV_P) 1836ev_loop_destroy (EV_P)
952{ 1837{
953 int i; 1838 int i;
1839
1840#if EV_MULTIPLICITY
1841 /* mimic free (0) */
1842 if (!EV_A)
1843 return;
1844#endif
1845
1846#if EV_CLEANUP_ENABLE
1847 /* queue cleanup watchers (and execute them) */
1848 if (expect_false (cleanupcnt))
1849 {
1850 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1851 EV_INVOKE_PENDING;
1852 }
1853#endif
1854
1855#if EV_CHILD_ENABLE
1856 if (ev_is_active (&childev))
1857 {
1858 ev_ref (EV_A); /* child watcher */
1859 ev_signal_stop (EV_A_ &childev);
1860 }
1861#endif
1862
1863 if (ev_is_active (&pipe_w))
1864 {
1865 /*ev_ref (EV_A);*/
1866 /*ev_io_stop (EV_A_ &pipe_w);*/
1867
1868#if EV_USE_EVENTFD
1869 if (evfd >= 0)
1870 close (evfd);
1871#endif
1872
1873 if (evpipe [0] >= 0)
1874 {
1875 EV_WIN32_CLOSE_FD (evpipe [0]);
1876 EV_WIN32_CLOSE_FD (evpipe [1]);
1877 }
1878 }
1879
1880#if EV_USE_SIGNALFD
1881 if (ev_is_active (&sigfd_w))
1882 close (sigfd);
1883#endif
954 1884
955#if EV_USE_INOTIFY 1885#if EV_USE_INOTIFY
956 if (fs_fd >= 0) 1886 if (fs_fd >= 0)
957 close (fs_fd); 1887 close (fs_fd);
958#endif 1888#endif
959 1889
960 if (backend_fd >= 0) 1890 if (backend_fd >= 0)
961 close (backend_fd); 1891 close (backend_fd);
962 1892
1893#if EV_USE_IOCP
1894 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1895#endif
963#if EV_USE_PORT 1896#if EV_USE_PORT
964 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1897 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
965#endif 1898#endif
966#if EV_USE_KQUEUE 1899#if EV_USE_KQUEUE
967 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1900 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
975#if EV_USE_SELECT 1908#if EV_USE_SELECT
976 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1909 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
977#endif 1910#endif
978 1911
979 for (i = NUMPRI; i--; ) 1912 for (i = NUMPRI; i--; )
1913 {
980 array_free (pending, [i]); 1914 array_free (pending, [i]);
1915#if EV_IDLE_ENABLE
1916 array_free (idle, [i]);
1917#endif
1918 }
1919
1920 ev_free (anfds); anfds = 0; anfdmax = 0;
981 1921
982 /* have to use the microsoft-never-gets-it-right macro */ 1922 /* have to use the microsoft-never-gets-it-right macro */
1923 array_free (rfeed, EMPTY);
983 array_free (fdchange, EMPTY0); 1924 array_free (fdchange, EMPTY);
984 array_free (timer, EMPTY0); 1925 array_free (timer, EMPTY);
985#if EV_PERIODIC_ENABLE 1926#if EV_PERIODIC_ENABLE
986 array_free (periodic, EMPTY0); 1927 array_free (periodic, EMPTY);
987#endif 1928#endif
1929#if EV_FORK_ENABLE
1930 array_free (fork, EMPTY);
1931#endif
1932#if EV_CLEANUP_ENABLE
988 array_free (idle, EMPTY0); 1933 array_free (cleanup, EMPTY);
1934#endif
989 array_free (prepare, EMPTY0); 1935 array_free (prepare, EMPTY);
990 array_free (check, EMPTY0); 1936 array_free (check, EMPTY);
1937#if EV_ASYNC_ENABLE
1938 array_free (async, EMPTY);
1939#endif
991 1940
992 backend = 0; 1941 backend = 0;
993}
994 1942
1943#if EV_MULTIPLICITY
1944 if (ev_is_default_loop (EV_A))
1945#endif
1946 ev_default_loop_ptr = 0;
1947#if EV_MULTIPLICITY
1948 else
1949 ev_free (EV_A);
1950#endif
1951}
1952
1953#if EV_USE_INOTIFY
995void inline_size infy_fork (EV_P); 1954inline_size void infy_fork (EV_P);
1955#endif
996 1956
997void inline_size 1957inline_size void
998loop_fork (EV_P) 1958loop_fork (EV_P)
999{ 1959{
1000#if EV_USE_PORT 1960#if EV_USE_PORT
1001 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1961 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1002#endif 1962#endif
… …
1008#endif 1968#endif
1009#if EV_USE_INOTIFY 1969#if EV_USE_INOTIFY
1010 infy_fork (EV_A); 1970 infy_fork (EV_A);
1011#endif 1971#endif
1012 1972
1013 if (ev_is_active (&sigev)) 1973 if (ev_is_active (&pipe_w))
1014 { 1974 {
1015 /* default loop */ 1975 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1016 1976
1017 ev_ref (EV_A); 1977 ev_ref (EV_A);
1018 ev_io_stop (EV_A_ &sigev); 1978 ev_io_stop (EV_A_ &pipe_w);
1019 close (sigpipe [0]);
1020 close (sigpipe [1]);
1021 1979
1022 while (pipe (sigpipe)) 1980#if EV_USE_EVENTFD
1023 syserr ("(libev) error creating pipe"); 1981 if (evfd >= 0)
1982 close (evfd);
1983#endif
1024 1984
1985 if (evpipe [0] >= 0)
1986 {
1987 EV_WIN32_CLOSE_FD (evpipe [0]);
1988 EV_WIN32_CLOSE_FD (evpipe [1]);
1989 }
1990
1991#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1025 siginit (EV_A); 1992 evpipe_init (EV_A);
1993 /* now iterate over everything, in case we missed something */
1994 pipecb (EV_A_ &pipe_w, EV_READ);
1995#endif
1026 } 1996 }
1027 1997
1028 postfork = 0; 1998 postfork = 0;
1029} 1999}
2000
2001#if EV_MULTIPLICITY
2002
2003struct ev_loop *
2004ev_loop_new (unsigned int flags)
2005{
2006 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2007
2008 memset (EV_A, 0, sizeof (struct ev_loop));
2009 loop_init (EV_A_ flags);
2010
2011 if (ev_backend (EV_A))
2012 return EV_A;
2013
2014 ev_free (EV_A);
2015 return 0;
2016}
2017
2018#endif /* multiplicity */
2019
2020#if EV_VERIFY
2021static void noinline
2022verify_watcher (EV_P_ W w)
2023{
2024 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2025
2026 if (w->pending)
2027 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2028}
2029
2030static void noinline
2031verify_heap (EV_P_ ANHE *heap, int N)
2032{
2033 int i;
2034
2035 for (i = HEAP0; i < N + HEAP0; ++i)
2036 {
2037 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2038 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2039 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2040
2041 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2042 }
2043}
2044
2045static void noinline
2046array_verify (EV_P_ W *ws, int cnt)
2047{
2048 while (cnt--)
2049 {
2050 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2051 verify_watcher (EV_A_ ws [cnt]);
2052 }
2053}
2054#endif
2055
2056#if EV_FEATURE_API
2057void
2058ev_verify (EV_P)
2059{
2060#if EV_VERIFY
2061 int i;
2062 WL w;
2063
2064 assert (activecnt >= -1);
2065
2066 assert (fdchangemax >= fdchangecnt);
2067 for (i = 0; i < fdchangecnt; ++i)
2068 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2069
2070 assert (anfdmax >= 0);
2071 for (i = 0; i < anfdmax; ++i)
2072 for (w = anfds [i].head; w; w = w->next)
2073 {
2074 verify_watcher (EV_A_ (W)w);
2075 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2076 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2077 }
2078
2079 assert (timermax >= timercnt);
2080 verify_heap (EV_A_ timers, timercnt);
2081
2082#if EV_PERIODIC_ENABLE
2083 assert (periodicmax >= periodiccnt);
2084 verify_heap (EV_A_ periodics, periodiccnt);
2085#endif
2086
2087 for (i = NUMPRI; i--; )
2088 {
2089 assert (pendingmax [i] >= pendingcnt [i]);
2090#if EV_IDLE_ENABLE
2091 assert (idleall >= 0);
2092 assert (idlemax [i] >= idlecnt [i]);
2093 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2094#endif
2095 }
2096
2097#if EV_FORK_ENABLE
2098 assert (forkmax >= forkcnt);
2099 array_verify (EV_A_ (W *)forks, forkcnt);
2100#endif
2101
2102#if EV_CLEANUP_ENABLE
2103 assert (cleanupmax >= cleanupcnt);
2104 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2105#endif
2106
2107#if EV_ASYNC_ENABLE
2108 assert (asyncmax >= asynccnt);
2109 array_verify (EV_A_ (W *)asyncs, asynccnt);
2110#endif
2111
2112#if EV_PREPARE_ENABLE
2113 assert (preparemax >= preparecnt);
2114 array_verify (EV_A_ (W *)prepares, preparecnt);
2115#endif
2116
2117#if EV_CHECK_ENABLE
2118 assert (checkmax >= checkcnt);
2119 array_verify (EV_A_ (W *)checks, checkcnt);
2120#endif
2121
2122# if 0
2123#if EV_CHILD_ENABLE
2124 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2125 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2126#endif
2127# endif
2128#endif
2129}
2130#endif
1030 2131
1031#if EV_MULTIPLICITY 2132#if EV_MULTIPLICITY
1032struct ev_loop * 2133struct ev_loop *
1033ev_loop_new (unsigned int flags)
1034{
1035 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1036
1037 memset (loop, 0, sizeof (struct ev_loop));
1038
1039 loop_init (EV_A_ flags);
1040
1041 if (ev_backend (EV_A))
1042 return loop;
1043
1044 return 0;
1045}
1046
1047void
1048ev_loop_destroy (EV_P)
1049{
1050 loop_destroy (EV_A);
1051 ev_free (loop);
1052}
1053
1054void
1055ev_loop_fork (EV_P)
1056{
1057 postfork = 1;
1058}
1059
1060#endif
1061
1062#if EV_MULTIPLICITY
1063struct ev_loop *
1064ev_default_loop_init (unsigned int flags)
1065#else 2134#else
1066int 2135int
2136#endif
1067ev_default_loop (unsigned int flags) 2137ev_default_loop (unsigned int flags)
1068#endif
1069{ 2138{
1070 if (sigpipe [0] == sigpipe [1])
1071 if (pipe (sigpipe))
1072 return 0;
1073
1074 if (!ev_default_loop_ptr) 2139 if (!ev_default_loop_ptr)
1075 { 2140 {
1076#if EV_MULTIPLICITY 2141#if EV_MULTIPLICITY
1077 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2142 EV_P = ev_default_loop_ptr = &default_loop_struct;
1078#else 2143#else
1079 ev_default_loop_ptr = 1; 2144 ev_default_loop_ptr = 1;
1080#endif 2145#endif
1081 2146
1082 loop_init (EV_A_ flags); 2147 loop_init (EV_A_ flags);
1083 2148
1084 if (ev_backend (EV_A)) 2149 if (ev_backend (EV_A))
1085 { 2150 {
1086 siginit (EV_A); 2151#if EV_CHILD_ENABLE
1087
1088#ifndef _WIN32
1089 ev_signal_init (&childev, childcb, SIGCHLD); 2152 ev_signal_init (&childev, childcb, SIGCHLD);
1090 ev_set_priority (&childev, EV_MAXPRI); 2153 ev_set_priority (&childev, EV_MAXPRI);
1091 ev_signal_start (EV_A_ &childev); 2154 ev_signal_start (EV_A_ &childev);
1092 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2155 ev_unref (EV_A); /* child watcher should not keep loop alive */
1093#endif 2156#endif
… …
1098 2161
1099 return ev_default_loop_ptr; 2162 return ev_default_loop_ptr;
1100} 2163}
1101 2164
1102void 2165void
1103ev_default_destroy (void) 2166ev_loop_fork (EV_P)
1104{ 2167{
1105#if EV_MULTIPLICITY 2168 postfork = 1; /* must be in line with ev_default_fork */
1106 struct ev_loop *loop = ev_default_loop_ptr;
1107#endif
1108
1109#ifndef _WIN32
1110 ev_ref (EV_A); /* child watcher */
1111 ev_signal_stop (EV_A_ &childev);
1112#endif
1113
1114 ev_ref (EV_A); /* signal watcher */
1115 ev_io_stop (EV_A_ &sigev);
1116
1117 close (sigpipe [0]); sigpipe [0] = 0;
1118 close (sigpipe [1]); sigpipe [1] = 0;
1119
1120 loop_destroy (EV_A);
1121}
1122
1123void
1124ev_default_fork (void)
1125{
1126#if EV_MULTIPLICITY
1127 struct ev_loop *loop = ev_default_loop_ptr;
1128#endif
1129
1130 if (backend)
1131 postfork = 1;
1132} 2169}
1133 2170
1134/*****************************************************************************/ 2171/*****************************************************************************/
1135 2172
1136int inline_size 2173void
1137any_pending (EV_P) 2174ev_invoke (EV_P_ void *w, int revents)
2175{
2176 EV_CB_INVOKE ((W)w, revents);
2177}
2178
2179unsigned int
2180ev_pending_count (EV_P)
1138{ 2181{
1139 int pri; 2182 int pri;
2183 unsigned int count = 0;
1140 2184
1141 for (pri = NUMPRI; pri--; ) 2185 for (pri = NUMPRI; pri--; )
1142 if (pendingcnt [pri]) 2186 count += pendingcnt [pri];
1143 return 1;
1144 2187
1145 return 0; 2188 return count;
1146} 2189}
1147 2190
1148void inline_speed 2191void noinline
1149call_pending (EV_P) 2192ev_invoke_pending (EV_P)
1150{ 2193{
1151 int pri; 2194 int pri;
1152 2195
1153 for (pri = NUMPRI; pri--; ) 2196 for (pri = NUMPRI; pri--; )
1154 while (pendingcnt [pri]) 2197 while (pendingcnt [pri])
1155 { 2198 {
1156 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2199 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1157 2200
1158 if (expect_true (p->w))
1159 {
1160 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1161
1162 p->w->pending = 0; 2201 p->w->pending = 0;
1163 EV_CB_INVOKE (p->w, p->events); 2202 EV_CB_INVOKE (p->w, p->events);
1164 } 2203 EV_FREQUENT_CHECK;
1165 } 2204 }
1166} 2205}
1167 2206
1168void inline_size 2207#if EV_IDLE_ENABLE
2208/* make idle watchers pending. this handles the "call-idle */
2209/* only when higher priorities are idle" logic */
2210inline_size void
2211idle_reify (EV_P)
2212{
2213 if (expect_false (idleall))
2214 {
2215 int pri;
2216
2217 for (pri = NUMPRI; pri--; )
2218 {
2219 if (pendingcnt [pri])
2220 break;
2221
2222 if (idlecnt [pri])
2223 {
2224 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2225 break;
2226 }
2227 }
2228 }
2229}
2230#endif
2231
2232/* make timers pending */
2233inline_size void
1169timers_reify (EV_P) 2234timers_reify (EV_P)
1170{ 2235{
2236 EV_FREQUENT_CHECK;
2237
1171 while (timercnt && ((WT)timers [0])->at <= mn_now) 2238 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1172 { 2239 {
1173 ev_timer *w = timers [0]; 2240 do
1174
1175 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1176
1177 /* first reschedule or stop timer */
1178 if (w->repeat)
1179 { 2241 {
2242 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2243
2244 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2245
2246 /* first reschedule or stop timer */
2247 if (w->repeat)
2248 {
2249 ev_at (w) += w->repeat;
2250 if (ev_at (w) < mn_now)
2251 ev_at (w) = mn_now;
2252
1180 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2253 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1181 2254
1182 ((WT)w)->at += w->repeat; 2255 ANHE_at_cache (timers [HEAP0]);
1183 if (((WT)w)->at < mn_now)
1184 ((WT)w)->at = mn_now;
1185
1186 downheap ((WT *)timers, timercnt, 0); 2256 downheap (timers, timercnt, HEAP0);
2257 }
2258 else
2259 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2260
2261 EV_FREQUENT_CHECK;
2262 feed_reverse (EV_A_ (W)w);
1187 } 2263 }
1188 else 2264 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1189 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1190 2265
1191 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2266 feed_reverse_done (EV_A_ EV_TIMER);
1192 } 2267 }
1193} 2268}
1194 2269
1195#if EV_PERIODIC_ENABLE 2270#if EV_PERIODIC_ENABLE
1196void inline_size 2271
2272static void noinline
2273periodic_recalc (EV_P_ ev_periodic *w)
2274{
2275 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2276 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2277
2278 /* the above almost always errs on the low side */
2279 while (at <= ev_rt_now)
2280 {
2281 ev_tstamp nat = at + w->interval;
2282
2283 /* when resolution fails us, we use ev_rt_now */
2284 if (expect_false (nat == at))
2285 {
2286 at = ev_rt_now;
2287 break;
2288 }
2289
2290 at = nat;
2291 }
2292
2293 ev_at (w) = at;
2294}
2295
2296/* make periodics pending */
2297inline_size void
1197periodics_reify (EV_P) 2298periodics_reify (EV_P)
1198{ 2299{
2300 EV_FREQUENT_CHECK;
2301
1199 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2302 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1200 { 2303 {
1201 ev_periodic *w = periodics [0]; 2304 int feed_count = 0;
1202 2305
1203 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2306 do
1204
1205 /* first reschedule or stop timer */
1206 if (w->reschedule_cb)
1207 { 2307 {
2308 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2309
2310 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2311
2312 /* first reschedule or stop timer */
2313 if (w->reschedule_cb)
2314 {
1208 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2315 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2316
1209 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2317 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2318
2319 ANHE_at_cache (periodics [HEAP0]);
1210 downheap ((WT *)periodics, periodiccnt, 0); 2320 downheap (periodics, periodiccnt, HEAP0);
2321 }
2322 else if (w->interval)
2323 {
2324 periodic_recalc (EV_A_ w);
2325 ANHE_at_cache (periodics [HEAP0]);
2326 downheap (periodics, periodiccnt, HEAP0);
2327 }
2328 else
2329 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2330
2331 EV_FREQUENT_CHECK;
2332 feed_reverse (EV_A_ (W)w);
1211 } 2333 }
1212 else if (w->interval) 2334 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1213 {
1214 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1215 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1216 downheap ((WT *)periodics, periodiccnt, 0);
1217 }
1218 else
1219 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1220 2335
1221 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2336 feed_reverse_done (EV_A_ EV_PERIODIC);
1222 } 2337 }
1223} 2338}
1224 2339
2340/* simply recalculate all periodics */
2341/* TODO: maybe ensure that at least one event happens when jumping forward? */
1225static void noinline 2342static void noinline
1226periodics_reschedule (EV_P) 2343periodics_reschedule (EV_P)
1227{ 2344{
1228 int i; 2345 int i;
1229 2346
1230 /* adjust periodics after time jump */ 2347 /* adjust periodics after time jump */
1231 for (i = 0; i < periodiccnt; ++i) 2348 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1232 { 2349 {
1233 ev_periodic *w = periodics [i]; 2350 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1234 2351
1235 if (w->reschedule_cb) 2352 if (w->reschedule_cb)
1236 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2353 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1237 else if (w->interval) 2354 else if (w->interval)
1238 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2355 periodic_recalc (EV_A_ w);
2356
2357 ANHE_at_cache (periodics [i]);
2358 }
2359
2360 reheap (periodics, periodiccnt);
2361}
2362#endif
2363
2364/* adjust all timers by a given offset */
2365static void noinline
2366timers_reschedule (EV_P_ ev_tstamp adjust)
2367{
2368 int i;
2369
2370 for (i = 0; i < timercnt; ++i)
1239 } 2371 {
1240 2372 ANHE *he = timers + i + HEAP0;
1241 /* now rebuild the heap */ 2373 ANHE_w (*he)->at += adjust;
1242 for (i = periodiccnt >> 1; i--; ) 2374 ANHE_at_cache (*he);
1243 downheap ((WT *)periodics, periodiccnt, i); 2375 }
1244} 2376}
1245#endif
1246 2377
1247int inline_size 2378/* fetch new monotonic and realtime times from the kernel */
1248time_update_monotonic (EV_P) 2379/* also detect if there was a timejump, and act accordingly */
2380inline_speed void
2381time_update (EV_P_ ev_tstamp max_block)
1249{ 2382{
2383#if EV_USE_MONOTONIC
2384 if (expect_true (have_monotonic))
2385 {
2386 int i;
2387 ev_tstamp odiff = rtmn_diff;
2388
1250 mn_now = get_clock (); 2389 mn_now = get_clock ();
1251 2390
2391 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2392 /* interpolate in the meantime */
1252 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2393 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1253 { 2394 {
1254 ev_rt_now = rtmn_diff + mn_now; 2395 ev_rt_now = rtmn_diff + mn_now;
1255 return 0; 2396 return;
1256 } 2397 }
1257 else 2398
1258 {
1259 now_floor = mn_now; 2399 now_floor = mn_now;
1260 ev_rt_now = ev_time (); 2400 ev_rt_now = ev_time ();
1261 return 1;
1262 }
1263}
1264 2401
1265void inline_size 2402 /* loop a few times, before making important decisions.
1266time_update (EV_P) 2403 * on the choice of "4": one iteration isn't enough,
1267{ 2404 * in case we get preempted during the calls to
1268 int i; 2405 * ev_time and get_clock. a second call is almost guaranteed
1269 2406 * to succeed in that case, though. and looping a few more times
1270#if EV_USE_MONOTONIC 2407 * doesn't hurt either as we only do this on time-jumps or
1271 if (expect_true (have_monotonic)) 2408 * in the unlikely event of having been preempted here.
1272 { 2409 */
1273 if (time_update_monotonic (EV_A)) 2410 for (i = 4; --i; )
1274 { 2411 {
1275 ev_tstamp odiff = rtmn_diff; 2412 ev_tstamp diff;
1276
1277 /* loop a few times, before making important decisions.
1278 * on the choice of "4": one iteration isn't enough,
1279 * in case we get preempted during the calls to
1280 * ev_time and get_clock. a second call is almost guaranteed
1281 * to succeed in that case, though. and looping a few more times
1282 * doesn't hurt either as we only do this on time-jumps or
1283 * in the unlikely event of having been preempted here.
1284 */
1285 for (i = 4; --i; )
1286 {
1287 rtmn_diff = ev_rt_now - mn_now; 2413 rtmn_diff = ev_rt_now - mn_now;
1288 2414
1289 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2415 diff = odiff - rtmn_diff;
2416
2417 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1290 return; /* all is well */ 2418 return; /* all is well */
1291 2419
1292 ev_rt_now = ev_time (); 2420 ev_rt_now = ev_time ();
1293 mn_now = get_clock (); 2421 mn_now = get_clock ();
1294 now_floor = mn_now; 2422 now_floor = mn_now;
1295 } 2423 }
1296 2424
2425 /* no timer adjustment, as the monotonic clock doesn't jump */
2426 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1297# if EV_PERIODIC_ENABLE 2427# if EV_PERIODIC_ENABLE
1298 periodics_reschedule (EV_A); 2428 periodics_reschedule (EV_A);
1299# endif 2429# endif
1300 /* no timer adjustment, as the monotonic clock doesn't jump */
1301 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1302 }
1303 } 2430 }
1304 else 2431 else
1305#endif 2432#endif
1306 { 2433 {
1307 ev_rt_now = ev_time (); 2434 ev_rt_now = ev_time ();
1308 2435
1309 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2436 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1310 { 2437 {
2438 /* adjust timers. this is easy, as the offset is the same for all of them */
2439 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1311#if EV_PERIODIC_ENABLE 2440#if EV_PERIODIC_ENABLE
1312 periodics_reschedule (EV_A); 2441 periodics_reschedule (EV_A);
1313#endif 2442#endif
1314
1315 /* adjust timers. this is easy, as the offset is the same for all of them */
1316 for (i = 0; i < timercnt; ++i)
1317 ((WT)timers [i])->at += ev_rt_now - mn_now;
1318 } 2443 }
1319 2444
1320 mn_now = ev_rt_now; 2445 mn_now = ev_rt_now;
1321 } 2446 }
1322} 2447}
1323 2448
1324void 2449void
1325ev_ref (EV_P)
1326{
1327 ++activecnt;
1328}
1329
1330void
1331ev_unref (EV_P)
1332{
1333 --activecnt;
1334}
1335
1336static int loop_done;
1337
1338void
1339ev_loop (EV_P_ int flags) 2450ev_run (EV_P_ int flags)
1340{ 2451{
1341 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2452#if EV_FEATURE_API
1342 ? EVUNLOOP_ONE 2453 ++loop_depth;
1343 : EVUNLOOP_CANCEL; 2454#endif
1344 2455
2456 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2457
2458 loop_done = EVBREAK_CANCEL;
2459
1345 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2460 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1346 2461
1347 while (expect_false (!activecnt)) 2462 do
1348 { 2463 {
2464#if EV_VERIFY >= 2
2465 ev_verify (EV_A);
2466#endif
2467
1349#ifndef _WIN32 2468#ifndef _WIN32
1350 if (expect_false (curpid)) /* penalise the forking check even more */ 2469 if (expect_false (curpid)) /* penalise the forking check even more */
1351 if (expect_false (getpid () != curpid)) 2470 if (expect_false (getpid () != curpid))
1352 { 2471 {
1353 curpid = getpid (); 2472 curpid = getpid ();
… …
1359 /* we might have forked, so queue fork handlers */ 2478 /* we might have forked, so queue fork handlers */
1360 if (expect_false (postfork)) 2479 if (expect_false (postfork))
1361 if (forkcnt) 2480 if (forkcnt)
1362 { 2481 {
1363 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2482 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1364 call_pending (EV_A); 2483 EV_INVOKE_PENDING;
1365 } 2484 }
1366#endif 2485#endif
1367 2486
2487#if EV_PREPARE_ENABLE
1368 /* queue check watchers (and execute them) */ 2488 /* queue prepare watchers (and execute them) */
1369 if (expect_false (preparecnt)) 2489 if (expect_false (preparecnt))
1370 { 2490 {
1371 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2491 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1372 call_pending (EV_A); 2492 EV_INVOKE_PENDING;
1373 } 2493 }
2494#endif
1374 2495
1375 if (expect_false (!activecnt)) 2496 if (expect_false (loop_done))
1376 break; 2497 break;
1377 2498
1378 /* we might have forked, so reify kernel state if necessary */ 2499 /* we might have forked, so reify kernel state if necessary */
1379 if (expect_false (postfork)) 2500 if (expect_false (postfork))
1380 loop_fork (EV_A); 2501 loop_fork (EV_A);
… …
1382 /* update fd-related kernel structures */ 2503 /* update fd-related kernel structures */
1383 fd_reify (EV_A); 2504 fd_reify (EV_A);
1384 2505
1385 /* calculate blocking time */ 2506 /* calculate blocking time */
1386 { 2507 {
1387 ev_tstamp block; 2508 ev_tstamp waittime = 0.;
2509 ev_tstamp sleeptime = 0.;
1388 2510
1389 if (expect_false (flags & EVLOOP_NONBLOCK || idlecnt || !activecnt)) 2511 /* remember old timestamp for io_blocktime calculation */
1390 block = 0.; /* do not block at all */ 2512 ev_tstamp prev_mn_now = mn_now;
1391 else 2513
2514 /* update time to cancel out callback processing overhead */
2515 time_update (EV_A_ 1e100);
2516
2517 /* from now on, we want a pipe-wake-up */
2518 pipe_write_wanted = 1;
2519
2520 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1392 { 2521 {
1393 /* update time to cancel out callback processing overhead */
1394#if EV_USE_MONOTONIC
1395 if (expect_true (have_monotonic))
1396 time_update_monotonic (EV_A);
1397 else
1398#endif
1399 {
1400 ev_rt_now = ev_time ();
1401 mn_now = ev_rt_now;
1402 }
1403
1404 block = MAX_BLOCKTIME; 2522 waittime = MAX_BLOCKTIME;
1405 2523
1406 if (timercnt) 2524 if (timercnt)
1407 { 2525 {
1408 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2526 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1409 if (block > to) block = to; 2527 if (waittime > to) waittime = to;
1410 } 2528 }
1411 2529
1412#if EV_PERIODIC_ENABLE 2530#if EV_PERIODIC_ENABLE
1413 if (periodiccnt) 2531 if (periodiccnt)
1414 { 2532 {
1415 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2533 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1416 if (block > to) block = to; 2534 if (waittime > to) waittime = to;
1417 } 2535 }
1418#endif 2536#endif
1419 2537
2538 /* don't let timeouts decrease the waittime below timeout_blocktime */
2539 if (expect_false (waittime < timeout_blocktime))
2540 waittime = timeout_blocktime;
2541
2542 /* at this point, we NEED to wait, so we have to ensure */
2543 /* to pass a minimum nonzero value to the backend */
2544 if (expect_false (waittime < backend_mintime))
2545 waittime = backend_mintime;
2546
2547 /* extra check because io_blocktime is commonly 0 */
1420 if (expect_false (block < 0.)) block = 0.; 2548 if (expect_false (io_blocktime))
2549 {
2550 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2551
2552 if (sleeptime > waittime - backend_mintime)
2553 sleeptime = waittime - backend_mintime;
2554
2555 if (expect_true (sleeptime > 0.))
2556 {
2557 ev_sleep (sleeptime);
2558 waittime -= sleeptime;
2559 }
2560 }
1421 } 2561 }
1422 2562
2563#if EV_FEATURE_API
2564 ++loop_count;
2565#endif
2566 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1423 backend_poll (EV_A_ block); 2567 backend_poll (EV_A_ waittime);
2568 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2569
2570 pipe_write_wanted = 0;
2571
2572 if (pipe_write_skipped)
2573 {
2574 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2575 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2576 }
2577
2578
2579 /* update ev_rt_now, do magic */
2580 time_update (EV_A_ waittime + sleeptime);
1424 } 2581 }
1425
1426 /* update ev_rt_now, do magic */
1427 time_update (EV_A);
1428 2582
1429 /* queue pending timers and reschedule them */ 2583 /* queue pending timers and reschedule them */
1430 timers_reify (EV_A); /* relative timers called last */ 2584 timers_reify (EV_A); /* relative timers called last */
1431#if EV_PERIODIC_ENABLE 2585#if EV_PERIODIC_ENABLE
1432 periodics_reify (EV_A); /* absolute timers called first */ 2586 periodics_reify (EV_A); /* absolute timers called first */
1433#endif 2587#endif
1434 2588
2589#if EV_IDLE_ENABLE
1435 /* queue idle watchers unless other events are pending */ 2590 /* queue idle watchers unless other events are pending */
1436 if (idlecnt && !any_pending (EV_A)) 2591 idle_reify (EV_A);
1437 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2592#endif
1438 2593
2594#if EV_CHECK_ENABLE
1439 /* queue check watchers, to be executed first */ 2595 /* queue check watchers, to be executed first */
1440 if (expect_false (checkcnt)) 2596 if (expect_false (checkcnt))
1441 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2597 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2598#endif
1442 2599
1443 call_pending (EV_A); 2600 EV_INVOKE_PENDING;
1444
1445 if (expect_false (loop_done))
1446 break;
1447 } 2601 }
2602 while (expect_true (
2603 activecnt
2604 && !loop_done
2605 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2606 ));
1448 2607
1449 if (loop_done == EVUNLOOP_ONE) 2608 if (loop_done == EVBREAK_ONE)
1450 loop_done = EVUNLOOP_CANCEL; 2609 loop_done = EVBREAK_CANCEL;
1451}
1452 2610
2611#if EV_FEATURE_API
2612 --loop_depth;
2613#endif
2614}
2615
1453void 2616void
1454ev_unloop (EV_P_ int how) 2617ev_break (EV_P_ int how)
1455{ 2618{
1456 loop_done = how; 2619 loop_done = how;
1457} 2620}
1458 2621
2622void
2623ev_ref (EV_P)
2624{
2625 ++activecnt;
2626}
2627
2628void
2629ev_unref (EV_P)
2630{
2631 --activecnt;
2632}
2633
2634void
2635ev_now_update (EV_P)
2636{
2637 time_update (EV_A_ 1e100);
2638}
2639
2640void
2641ev_suspend (EV_P)
2642{
2643 ev_now_update (EV_A);
2644}
2645
2646void
2647ev_resume (EV_P)
2648{
2649 ev_tstamp mn_prev = mn_now;
2650
2651 ev_now_update (EV_A);
2652 timers_reschedule (EV_A_ mn_now - mn_prev);
2653#if EV_PERIODIC_ENABLE
2654 /* TODO: really do this? */
2655 periodics_reschedule (EV_A);
2656#endif
2657}
2658
1459/*****************************************************************************/ 2659/*****************************************************************************/
2660/* singly-linked list management, used when the expected list length is short */
1460 2661
1461void inline_size 2662inline_size void
1462wlist_add (WL *head, WL elem) 2663wlist_add (WL *head, WL elem)
1463{ 2664{
1464 elem->next = *head; 2665 elem->next = *head;
1465 *head = elem; 2666 *head = elem;
1466} 2667}
1467 2668
1468void inline_size 2669inline_size void
1469wlist_del (WL *head, WL elem) 2670wlist_del (WL *head, WL elem)
1470{ 2671{
1471 while (*head) 2672 while (*head)
1472 { 2673 {
1473 if (*head == elem) 2674 if (expect_true (*head == elem))
1474 { 2675 {
1475 *head = elem->next; 2676 *head = elem->next;
1476 return; 2677 break;
1477 } 2678 }
1478 2679
1479 head = &(*head)->next; 2680 head = &(*head)->next;
1480 } 2681 }
1481} 2682}
1482 2683
1483void inline_speed 2684/* internal, faster, version of ev_clear_pending */
2685inline_speed void
1484ev_clear_pending (EV_P_ W w) 2686clear_pending (EV_P_ W w)
1485{ 2687{
1486 if (w->pending) 2688 if (w->pending)
1487 { 2689 {
1488 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2690 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1489 w->pending = 0; 2691 w->pending = 0;
1490 } 2692 }
1491} 2693}
1492 2694
1493void inline_speed 2695int
2696ev_clear_pending (EV_P_ void *w)
2697{
2698 W w_ = (W)w;
2699 int pending = w_->pending;
2700
2701 if (expect_true (pending))
2702 {
2703 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2704 p->w = (W)&pending_w;
2705 w_->pending = 0;
2706 return p->events;
2707 }
2708 else
2709 return 0;
2710}
2711
2712inline_size void
2713pri_adjust (EV_P_ W w)
2714{
2715 int pri = ev_priority (w);
2716 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2717 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2718 ev_set_priority (w, pri);
2719}
2720
2721inline_speed void
1494ev_start (EV_P_ W w, int active) 2722ev_start (EV_P_ W w, int active)
1495{ 2723{
1496 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2724 pri_adjust (EV_A_ w);
1497 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1498
1499 w->active = active; 2725 w->active = active;
1500 ev_ref (EV_A); 2726 ev_ref (EV_A);
1501} 2727}
1502 2728
1503void inline_size 2729inline_size void
1504ev_stop (EV_P_ W w) 2730ev_stop (EV_P_ W w)
1505{ 2731{
1506 ev_unref (EV_A); 2732 ev_unref (EV_A);
1507 w->active = 0; 2733 w->active = 0;
1508} 2734}
1509 2735
1510/*****************************************************************************/ 2736/*****************************************************************************/
1511 2737
1512void 2738void noinline
1513ev_io_start (EV_P_ ev_io *w) 2739ev_io_start (EV_P_ ev_io *w)
1514{ 2740{
1515 int fd = w->fd; 2741 int fd = w->fd;
1516 2742
1517 if (expect_false (ev_is_active (w))) 2743 if (expect_false (ev_is_active (w)))
1518 return; 2744 return;
1519 2745
1520 assert (("ev_io_start called with negative fd", fd >= 0)); 2746 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2747 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2748
2749 EV_FREQUENT_CHECK;
1521 2750
1522 ev_start (EV_A_ (W)w, 1); 2751 ev_start (EV_A_ (W)w, 1);
1523 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2752 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1524 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2753 wlist_add (&anfds[fd].head, (WL)w);
1525 2754
1526 fd_change (EV_A_ fd); 2755 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1527} 2756 w->events &= ~EV__IOFDSET;
1528 2757
1529void 2758 EV_FREQUENT_CHECK;
2759}
2760
2761void noinline
1530ev_io_stop (EV_P_ ev_io *w) 2762ev_io_stop (EV_P_ ev_io *w)
1531{ 2763{
1532 ev_clear_pending (EV_A_ (W)w); 2764 clear_pending (EV_A_ (W)w);
1533 if (expect_false (!ev_is_active (w))) 2765 if (expect_false (!ev_is_active (w)))
1534 return; 2766 return;
1535 2767
1536 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2768 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1537 2769
2770 EV_FREQUENT_CHECK;
2771
1538 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2772 wlist_del (&anfds[w->fd].head, (WL)w);
1539 ev_stop (EV_A_ (W)w); 2773 ev_stop (EV_A_ (W)w);
1540 2774
1541 fd_change (EV_A_ w->fd); 2775 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1542}
1543 2776
1544void 2777 EV_FREQUENT_CHECK;
2778}
2779
2780void noinline
1545ev_timer_start (EV_P_ ev_timer *w) 2781ev_timer_start (EV_P_ ev_timer *w)
1546{ 2782{
1547 if (expect_false (ev_is_active (w))) 2783 if (expect_false (ev_is_active (w)))
1548 return; 2784 return;
1549 2785
1550 ((WT)w)->at += mn_now; 2786 ev_at (w) += mn_now;
1551 2787
1552 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2788 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1553 2789
2790 EV_FREQUENT_CHECK;
2791
2792 ++timercnt;
1554 ev_start (EV_A_ (W)w, ++timercnt); 2793 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1555 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2794 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1556 timers [timercnt - 1] = w; 2795 ANHE_w (timers [ev_active (w)]) = (WT)w;
1557 upheap ((WT *)timers, timercnt - 1); 2796 ANHE_at_cache (timers [ev_active (w)]);
2797 upheap (timers, ev_active (w));
1558 2798
2799 EV_FREQUENT_CHECK;
2800
1559 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2801 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1560} 2802}
1561 2803
1562void 2804void noinline
1563ev_timer_stop (EV_P_ ev_timer *w) 2805ev_timer_stop (EV_P_ ev_timer *w)
1564{ 2806{
1565 ev_clear_pending (EV_A_ (W)w); 2807 clear_pending (EV_A_ (W)w);
1566 if (expect_false (!ev_is_active (w))) 2808 if (expect_false (!ev_is_active (w)))
1567 return; 2809 return;
1568 2810
1569 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2811 EV_FREQUENT_CHECK;
1570 2812
1571 { 2813 {
1572 int active = ((W)w)->active; 2814 int active = ev_active (w);
1573 2815
2816 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2817
2818 --timercnt;
2819
1574 if (expect_true (--active < --timercnt)) 2820 if (expect_true (active < timercnt + HEAP0))
1575 { 2821 {
1576 timers [active] = timers [timercnt]; 2822 timers [active] = timers [timercnt + HEAP0];
1577 adjustheap ((WT *)timers, timercnt, active); 2823 adjustheap (timers, timercnt, active);
1578 } 2824 }
1579 } 2825 }
1580 2826
1581 ((WT)w)->at -= mn_now; 2827 ev_at (w) -= mn_now;
1582 2828
1583 ev_stop (EV_A_ (W)w); 2829 ev_stop (EV_A_ (W)w);
1584}
1585 2830
1586void 2831 EV_FREQUENT_CHECK;
2832}
2833
2834void noinline
1587ev_timer_again (EV_P_ ev_timer *w) 2835ev_timer_again (EV_P_ ev_timer *w)
1588{ 2836{
2837 EV_FREQUENT_CHECK;
2838
1589 if (ev_is_active (w)) 2839 if (ev_is_active (w))
1590 { 2840 {
1591 if (w->repeat) 2841 if (w->repeat)
1592 { 2842 {
1593 ((WT)w)->at = mn_now + w->repeat; 2843 ev_at (w) = mn_now + w->repeat;
2844 ANHE_at_cache (timers [ev_active (w)]);
1594 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2845 adjustheap (timers, timercnt, ev_active (w));
1595 } 2846 }
1596 else 2847 else
1597 ev_timer_stop (EV_A_ w); 2848 ev_timer_stop (EV_A_ w);
1598 } 2849 }
1599 else if (w->repeat) 2850 else if (w->repeat)
1600 { 2851 {
1601 w->at = w->repeat; 2852 ev_at (w) = w->repeat;
1602 ev_timer_start (EV_A_ w); 2853 ev_timer_start (EV_A_ w);
1603 } 2854 }
2855
2856 EV_FREQUENT_CHECK;
2857}
2858
2859ev_tstamp
2860ev_timer_remaining (EV_P_ ev_timer *w)
2861{
2862 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1604} 2863}
1605 2864
1606#if EV_PERIODIC_ENABLE 2865#if EV_PERIODIC_ENABLE
1607void 2866void noinline
1608ev_periodic_start (EV_P_ ev_periodic *w) 2867ev_periodic_start (EV_P_ ev_periodic *w)
1609{ 2868{
1610 if (expect_false (ev_is_active (w))) 2869 if (expect_false (ev_is_active (w)))
1611 return; 2870 return;
1612 2871
1613 if (w->reschedule_cb) 2872 if (w->reschedule_cb)
1614 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2873 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1615 else if (w->interval) 2874 else if (w->interval)
1616 { 2875 {
1617 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2876 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1618 /* this formula differs from the one in periodic_reify because we do not always round up */ 2877 periodic_recalc (EV_A_ w);
1619 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1620 } 2878 }
2879 else
2880 ev_at (w) = w->offset;
1621 2881
2882 EV_FREQUENT_CHECK;
2883
2884 ++periodiccnt;
1622 ev_start (EV_A_ (W)w, ++periodiccnt); 2885 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1623 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2886 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1624 periodics [periodiccnt - 1] = w; 2887 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1625 upheap ((WT *)periodics, periodiccnt - 1); 2888 ANHE_at_cache (periodics [ev_active (w)]);
2889 upheap (periodics, ev_active (w));
1626 2890
2891 EV_FREQUENT_CHECK;
2892
1627 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2893 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1628} 2894}
1629 2895
1630void 2896void noinline
1631ev_periodic_stop (EV_P_ ev_periodic *w) 2897ev_periodic_stop (EV_P_ ev_periodic *w)
1632{ 2898{
1633 ev_clear_pending (EV_A_ (W)w); 2899 clear_pending (EV_A_ (W)w);
1634 if (expect_false (!ev_is_active (w))) 2900 if (expect_false (!ev_is_active (w)))
1635 return; 2901 return;
1636 2902
1637 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2903 EV_FREQUENT_CHECK;
1638 2904
1639 { 2905 {
1640 int active = ((W)w)->active; 2906 int active = ev_active (w);
1641 2907
2908 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2909
2910 --periodiccnt;
2911
1642 if (expect_true (--active < --periodiccnt)) 2912 if (expect_true (active < periodiccnt + HEAP0))
1643 { 2913 {
1644 periodics [active] = periodics [periodiccnt]; 2914 periodics [active] = periodics [periodiccnt + HEAP0];
1645 adjustheap ((WT *)periodics, periodiccnt, active); 2915 adjustheap (periodics, periodiccnt, active);
1646 } 2916 }
1647 } 2917 }
1648 2918
1649 ev_stop (EV_A_ (W)w); 2919 ev_stop (EV_A_ (W)w);
1650}
1651 2920
1652void 2921 EV_FREQUENT_CHECK;
2922}
2923
2924void noinline
1653ev_periodic_again (EV_P_ ev_periodic *w) 2925ev_periodic_again (EV_P_ ev_periodic *w)
1654{ 2926{
1655 /* TODO: use adjustheap and recalculation */ 2927 /* TODO: use adjustheap and recalculation */
1656 ev_periodic_stop (EV_A_ w); 2928 ev_periodic_stop (EV_A_ w);
1657 ev_periodic_start (EV_A_ w); 2929 ev_periodic_start (EV_A_ w);
… …
1660 2932
1661#ifndef SA_RESTART 2933#ifndef SA_RESTART
1662# define SA_RESTART 0 2934# define SA_RESTART 0
1663#endif 2935#endif
1664 2936
1665void 2937#if EV_SIGNAL_ENABLE
2938
2939void noinline
1666ev_signal_start (EV_P_ ev_signal *w) 2940ev_signal_start (EV_P_ ev_signal *w)
1667{ 2941{
1668#if EV_MULTIPLICITY
1669 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1670#endif
1671 if (expect_false (ev_is_active (w))) 2942 if (expect_false (ev_is_active (w)))
1672 return; 2943 return;
1673 2944
1674 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2945 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2946
2947#if EV_MULTIPLICITY
2948 assert (("libev: a signal must not be attached to two different loops",
2949 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2950
2951 signals [w->signum - 1].loop = EV_A;
2952#endif
2953
2954 EV_FREQUENT_CHECK;
2955
2956#if EV_USE_SIGNALFD
2957 if (sigfd == -2)
2958 {
2959 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2960 if (sigfd < 0 && errno == EINVAL)
2961 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2962
2963 if (sigfd >= 0)
2964 {
2965 fd_intern (sigfd); /* doing it twice will not hurt */
2966
2967 sigemptyset (&sigfd_set);
2968
2969 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2970 ev_set_priority (&sigfd_w, EV_MAXPRI);
2971 ev_io_start (EV_A_ &sigfd_w);
2972 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2973 }
2974 }
2975
2976 if (sigfd >= 0)
2977 {
2978 /* TODO: check .head */
2979 sigaddset (&sigfd_set, w->signum);
2980 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2981
2982 signalfd (sigfd, &sigfd_set, 0);
2983 }
2984#endif
1675 2985
1676 ev_start (EV_A_ (W)w, 1); 2986 ev_start (EV_A_ (W)w, 1);
1677 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1678 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2987 wlist_add (&signals [w->signum - 1].head, (WL)w);
1679 2988
1680 if (!((WL)w)->next) 2989 if (!((WL)w)->next)
2990# if EV_USE_SIGNALFD
2991 if (sigfd < 0) /*TODO*/
2992# endif
1681 { 2993 {
1682#if _WIN32 2994# ifdef _WIN32
2995 evpipe_init (EV_A);
2996
1683 signal (w->signum, sighandler); 2997 signal (w->signum, ev_sighandler);
1684#else 2998# else
1685 struct sigaction sa; 2999 struct sigaction sa;
3000
3001 evpipe_init (EV_A);
3002
1686 sa.sa_handler = sighandler; 3003 sa.sa_handler = ev_sighandler;
1687 sigfillset (&sa.sa_mask); 3004 sigfillset (&sa.sa_mask);
1688 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3005 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1689 sigaction (w->signum, &sa, 0); 3006 sigaction (w->signum, &sa, 0);
3007
3008 if (origflags & EVFLAG_NOSIGMASK)
3009 {
3010 sigemptyset (&sa.sa_mask);
3011 sigaddset (&sa.sa_mask, w->signum);
3012 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3013 }
1690#endif 3014#endif
1691 } 3015 }
1692}
1693 3016
1694void 3017 EV_FREQUENT_CHECK;
3018}
3019
3020void noinline
1695ev_signal_stop (EV_P_ ev_signal *w) 3021ev_signal_stop (EV_P_ ev_signal *w)
1696{ 3022{
1697 ev_clear_pending (EV_A_ (W)w); 3023 clear_pending (EV_A_ (W)w);
1698 if (expect_false (!ev_is_active (w))) 3024 if (expect_false (!ev_is_active (w)))
1699 return; 3025 return;
1700 3026
3027 EV_FREQUENT_CHECK;
3028
1701 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3029 wlist_del (&signals [w->signum - 1].head, (WL)w);
1702 ev_stop (EV_A_ (W)w); 3030 ev_stop (EV_A_ (W)w);
1703 3031
1704 if (!signals [w->signum - 1].head) 3032 if (!signals [w->signum - 1].head)
3033 {
3034#if EV_MULTIPLICITY
3035 signals [w->signum - 1].loop = 0; /* unattach from signal */
3036#endif
3037#if EV_USE_SIGNALFD
3038 if (sigfd >= 0)
3039 {
3040 sigset_t ss;
3041
3042 sigemptyset (&ss);
3043 sigaddset (&ss, w->signum);
3044 sigdelset (&sigfd_set, w->signum);
3045
3046 signalfd (sigfd, &sigfd_set, 0);
3047 sigprocmask (SIG_UNBLOCK, &ss, 0);
3048 }
3049 else
3050#endif
1705 signal (w->signum, SIG_DFL); 3051 signal (w->signum, SIG_DFL);
3052 }
3053
3054 EV_FREQUENT_CHECK;
1706} 3055}
3056
3057#endif
3058
3059#if EV_CHILD_ENABLE
1707 3060
1708void 3061void
1709ev_child_start (EV_P_ ev_child *w) 3062ev_child_start (EV_P_ ev_child *w)
1710{ 3063{
1711#if EV_MULTIPLICITY 3064#if EV_MULTIPLICITY
1712 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3065 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1713#endif 3066#endif
1714 if (expect_false (ev_is_active (w))) 3067 if (expect_false (ev_is_active (w)))
1715 return; 3068 return;
1716 3069
3070 EV_FREQUENT_CHECK;
3071
1717 ev_start (EV_A_ (W)w, 1); 3072 ev_start (EV_A_ (W)w, 1);
1718 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3073 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3074
3075 EV_FREQUENT_CHECK;
1719} 3076}
1720 3077
1721void 3078void
1722ev_child_stop (EV_P_ ev_child *w) 3079ev_child_stop (EV_P_ ev_child *w)
1723{ 3080{
1724 ev_clear_pending (EV_A_ (W)w); 3081 clear_pending (EV_A_ (W)w);
1725 if (expect_false (!ev_is_active (w))) 3082 if (expect_false (!ev_is_active (w)))
1726 return; 3083 return;
1727 3084
3085 EV_FREQUENT_CHECK;
3086
1728 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3087 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1729 ev_stop (EV_A_ (W)w); 3088 ev_stop (EV_A_ (W)w);
3089
3090 EV_FREQUENT_CHECK;
1730} 3091}
3092
3093#endif
1731 3094
1732#if EV_STAT_ENABLE 3095#if EV_STAT_ENABLE
1733 3096
1734# ifdef _WIN32 3097# ifdef _WIN32
1735# undef lstat 3098# undef lstat
1736# define lstat(a,b) _stati64 (a,b) 3099# define lstat(a,b) _stati64 (a,b)
1737# endif 3100# endif
1738 3101
1739#define DEF_STAT_INTERVAL 5.0074891 3102#define DEF_STAT_INTERVAL 5.0074891
3103#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1740#define MIN_STAT_INTERVAL 0.1074891 3104#define MIN_STAT_INTERVAL 0.1074891
1741 3105
1742static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3106static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1743 3107
1744#if EV_USE_INOTIFY 3108#if EV_USE_INOTIFY
1745# define EV_INOTIFY_BUFSIZE 8192 3109
3110/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3111# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1746 3112
1747static void noinline 3113static void noinline
1748infy_add (EV_P_ ev_stat *w) 3114infy_add (EV_P_ ev_stat *w)
1749{ 3115{
1750 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); 3116 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);
1751 3117
1752 if (w->wd < 0) 3118 if (w->wd >= 0)
3119 {
3120 struct statfs sfs;
3121
3122 /* now local changes will be tracked by inotify, but remote changes won't */
3123 /* unless the filesystem is known to be local, we therefore still poll */
3124 /* also do poll on <2.6.25, but with normal frequency */
3125
3126 if (!fs_2625)
3127 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3128 else if (!statfs (w->path, &sfs)
3129 && (sfs.f_type == 0x1373 /* devfs */
3130 || sfs.f_type == 0xEF53 /* ext2/3 */
3131 || sfs.f_type == 0x3153464a /* jfs */
3132 || sfs.f_type == 0x52654973 /* reiser3 */
3133 || sfs.f_type == 0x01021994 /* tempfs */
3134 || sfs.f_type == 0x58465342 /* xfs */))
3135 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3136 else
3137 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1753 { 3138 }
1754 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3139 else
3140 {
3141 /* can't use inotify, continue to stat */
3142 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1755 3143
1756 /* monitor some parent directory for speedup hints */ 3144 /* if path is not there, monitor some parent directory for speedup hints */
3145 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3146 /* but an efficiency issue only */
1757 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3147 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1758 { 3148 {
1759 char path [4096]; 3149 char path [4096];
1760 strcpy (path, w->path); 3150 strcpy (path, w->path);
1761 3151
… …
1764 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3154 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1765 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3155 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1766 3156
1767 char *pend = strrchr (path, '/'); 3157 char *pend = strrchr (path, '/');
1768 3158
1769 if (!pend) 3159 if (!pend || pend == path)
1770 break; /* whoops, no '/', complain to your admin */ 3160 break;
1771 3161
1772 *pend = 0; 3162 *pend = 0;
1773 w->wd = inotify_add_watch (fs_fd, path, mask); 3163 w->wd = inotify_add_watch (fs_fd, path, mask);
1774 } 3164 }
1775 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3165 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1776 } 3166 }
1777 } 3167 }
1778 else
1779 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1780 3168
1781 if (w->wd >= 0) 3169 if (w->wd >= 0)
1782 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3170 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3171
3172 /* now re-arm timer, if required */
3173 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3174 ev_timer_again (EV_A_ &w->timer);
3175 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1783} 3176}
1784 3177
1785static void noinline 3178static void noinline
1786infy_del (EV_P_ ev_stat *w) 3179infy_del (EV_P_ ev_stat *w)
1787{ 3180{
… …
1790 3183
1791 if (wd < 0) 3184 if (wd < 0)
1792 return; 3185 return;
1793 3186
1794 w->wd = -2; 3187 w->wd = -2;
1795 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3188 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1796 wlist_del (&fs_hash [slot].head, (WL)w); 3189 wlist_del (&fs_hash [slot].head, (WL)w);
1797 3190
1798 /* remove this watcher, if others are watching it, they will rearm */ 3191 /* remove this watcher, if others are watching it, they will rearm */
1799 inotify_rm_watch (fs_fd, wd); 3192 inotify_rm_watch (fs_fd, wd);
1800} 3193}
1801 3194
1802static void noinline 3195static void noinline
1803infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3196infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1804{ 3197{
1805 if (slot < 0) 3198 if (slot < 0)
1806 /* overflow, need to check for all hahs slots */ 3199 /* overflow, need to check for all hash slots */
1807 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3200 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1808 infy_wd (EV_A_ slot, wd, ev); 3201 infy_wd (EV_A_ slot, wd, ev);
1809 else 3202 else
1810 { 3203 {
1811 WL w_; 3204 WL w_;
1812 3205
1813 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3206 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1814 { 3207 {
1815 ev_stat *w = (ev_stat *)w_; 3208 ev_stat *w = (ev_stat *)w_;
1816 w_ = w_->next; /* lets us remove this watcher and all before it */ 3209 w_ = w_->next; /* lets us remove this watcher and all before it */
1817 3210
1818 if (w->wd == wd || wd == -1) 3211 if (w->wd == wd || wd == -1)
1819 { 3212 {
1820 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3213 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1821 { 3214 {
3215 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1822 w->wd = -1; 3216 w->wd = -1;
1823 infy_add (EV_A_ w); /* re-add, no matter what */ 3217 infy_add (EV_A_ w); /* re-add, no matter what */
1824 } 3218 }
1825 3219
1826 stat_timer_cb (EV_A_ &w->timer, 0); 3220 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1831 3225
1832static void 3226static void
1833infy_cb (EV_P_ ev_io *w, int revents) 3227infy_cb (EV_P_ ev_io *w, int revents)
1834{ 3228{
1835 char buf [EV_INOTIFY_BUFSIZE]; 3229 char buf [EV_INOTIFY_BUFSIZE];
1836 struct inotify_event *ev = (struct inotify_event *)buf;
1837 int ofs; 3230 int ofs;
1838 int len = read (fs_fd, buf, sizeof (buf)); 3231 int len = read (fs_fd, buf, sizeof (buf));
1839 3232
1840 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3233 for (ofs = 0; ofs < len; )
3234 {
3235 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1841 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3236 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3237 ofs += sizeof (struct inotify_event) + ev->len;
3238 }
1842} 3239}
1843 3240
1844void inline_size 3241inline_size void
3242ev_check_2625 (EV_P)
3243{
3244 /* kernels < 2.6.25 are borked
3245 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3246 */
3247 if (ev_linux_version () < 0x020619)
3248 return;
3249
3250 fs_2625 = 1;
3251}
3252
3253inline_size int
3254infy_newfd (void)
3255{
3256#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3257 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3258 if (fd >= 0)
3259 return fd;
3260#endif
3261 return inotify_init ();
3262}
3263
3264inline_size void
1845infy_init (EV_P) 3265infy_init (EV_P)
1846{ 3266{
1847 if (fs_fd != -2) 3267 if (fs_fd != -2)
1848 return; 3268 return;
1849 3269
3270 fs_fd = -1;
3271
3272 ev_check_2625 (EV_A);
3273
1850 fs_fd = inotify_init (); 3274 fs_fd = infy_newfd ();
1851 3275
1852 if (fs_fd >= 0) 3276 if (fs_fd >= 0)
1853 { 3277 {
3278 fd_intern (fs_fd);
1854 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3279 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1855 ev_set_priority (&fs_w, EV_MAXPRI); 3280 ev_set_priority (&fs_w, EV_MAXPRI);
1856 ev_io_start (EV_A_ &fs_w); 3281 ev_io_start (EV_A_ &fs_w);
3282 ev_unref (EV_A);
1857 } 3283 }
1858} 3284}
1859 3285
1860void inline_size 3286inline_size void
1861infy_fork (EV_P) 3287infy_fork (EV_P)
1862{ 3288{
1863 int slot; 3289 int slot;
1864 3290
1865 if (fs_fd < 0) 3291 if (fs_fd < 0)
1866 return; 3292 return;
1867 3293
3294 ev_ref (EV_A);
3295 ev_io_stop (EV_A_ &fs_w);
1868 close (fs_fd); 3296 close (fs_fd);
1869 fs_fd = inotify_init (); 3297 fs_fd = infy_newfd ();
1870 3298
3299 if (fs_fd >= 0)
3300 {
3301 fd_intern (fs_fd);
3302 ev_io_set (&fs_w, fs_fd, EV_READ);
3303 ev_io_start (EV_A_ &fs_w);
3304 ev_unref (EV_A);
3305 }
3306
1871 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3307 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1872 { 3308 {
1873 WL w_ = fs_hash [slot].head; 3309 WL w_ = fs_hash [slot].head;
1874 fs_hash [slot].head = 0; 3310 fs_hash [slot].head = 0;
1875 3311
1876 while (w_) 3312 while (w_)
… …
1881 w->wd = -1; 3317 w->wd = -1;
1882 3318
1883 if (fs_fd >= 0) 3319 if (fs_fd >= 0)
1884 infy_add (EV_A_ w); /* re-add, no matter what */ 3320 infy_add (EV_A_ w); /* re-add, no matter what */
1885 else 3321 else
3322 {
3323 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3324 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1886 ev_timer_start (EV_A_ &w->timer); 3325 ev_timer_again (EV_A_ &w->timer);
3326 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3327 }
1887 } 3328 }
1888
1889 } 3329 }
1890} 3330}
1891 3331
3332#endif
3333
3334#ifdef _WIN32
3335# define EV_LSTAT(p,b) _stati64 (p, b)
3336#else
3337# define EV_LSTAT(p,b) lstat (p, b)
1892#endif 3338#endif
1893 3339
1894void 3340void
1895ev_stat_stat (EV_P_ ev_stat *w) 3341ev_stat_stat (EV_P_ ev_stat *w)
1896{ 3342{
… …
1903static void noinline 3349static void noinline
1904stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3350stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1905{ 3351{
1906 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3352 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1907 3353
1908 /* we copy this here each the time so that */ 3354 ev_statdata prev = w->attr;
1909 /* prev has the old value when the callback gets invoked */
1910 w->prev = w->attr;
1911 ev_stat_stat (EV_A_ w); 3355 ev_stat_stat (EV_A_ w);
1912 3356
1913 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3357 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1914 if ( 3358 if (
1915 w->prev.st_dev != w->attr.st_dev 3359 prev.st_dev != w->attr.st_dev
1916 || w->prev.st_ino != w->attr.st_ino 3360 || prev.st_ino != w->attr.st_ino
1917 || w->prev.st_mode != w->attr.st_mode 3361 || prev.st_mode != w->attr.st_mode
1918 || w->prev.st_nlink != w->attr.st_nlink 3362 || prev.st_nlink != w->attr.st_nlink
1919 || w->prev.st_uid != w->attr.st_uid 3363 || prev.st_uid != w->attr.st_uid
1920 || w->prev.st_gid != w->attr.st_gid 3364 || prev.st_gid != w->attr.st_gid
1921 || w->prev.st_rdev != w->attr.st_rdev 3365 || prev.st_rdev != w->attr.st_rdev
1922 || w->prev.st_size != w->attr.st_size 3366 || prev.st_size != w->attr.st_size
1923 || w->prev.st_atime != w->attr.st_atime 3367 || prev.st_atime != w->attr.st_atime
1924 || w->prev.st_mtime != w->attr.st_mtime 3368 || prev.st_mtime != w->attr.st_mtime
1925 || w->prev.st_ctime != w->attr.st_ctime 3369 || prev.st_ctime != w->attr.st_ctime
1926 ) { 3370 ) {
3371 /* we only update w->prev on actual differences */
3372 /* in case we test more often than invoke the callback, */
3373 /* to ensure that prev is always different to attr */
3374 w->prev = prev;
3375
1927 #if EV_USE_INOTIFY 3376 #if EV_USE_INOTIFY
3377 if (fs_fd >= 0)
3378 {
1928 infy_del (EV_A_ w); 3379 infy_del (EV_A_ w);
1929 infy_add (EV_A_ w); 3380 infy_add (EV_A_ w);
1930 ev_stat_stat (EV_A_ w); /* avoid race... */ 3381 ev_stat_stat (EV_A_ w); /* avoid race... */
3382 }
1931 #endif 3383 #endif
1932 3384
1933 ev_feed_event (EV_A_ w, EV_STAT); 3385 ev_feed_event (EV_A_ w, EV_STAT);
1934 } 3386 }
1935} 3387}
… …
1938ev_stat_start (EV_P_ ev_stat *w) 3390ev_stat_start (EV_P_ ev_stat *w)
1939{ 3391{
1940 if (expect_false (ev_is_active (w))) 3392 if (expect_false (ev_is_active (w)))
1941 return; 3393 return;
1942 3394
1943 /* since we use memcmp, we need to clear any padding data etc. */
1944 memset (&w->prev, 0, sizeof (ev_statdata));
1945 memset (&w->attr, 0, sizeof (ev_statdata));
1946
1947 ev_stat_stat (EV_A_ w); 3395 ev_stat_stat (EV_A_ w);
1948 3396
3397 if (w->interval < MIN_STAT_INTERVAL && w->interval)
1949 if (w->interval < MIN_STAT_INTERVAL) 3398 w->interval = MIN_STAT_INTERVAL;
1950 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1951 3399
1952 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3400 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
1953 ev_set_priority (&w->timer, ev_priority (w)); 3401 ev_set_priority (&w->timer, ev_priority (w));
1954 3402
1955#if EV_USE_INOTIFY 3403#if EV_USE_INOTIFY
1956 infy_init (EV_A); 3404 infy_init (EV_A);
1957 3405
1958 if (fs_fd >= 0) 3406 if (fs_fd >= 0)
1959 infy_add (EV_A_ w); 3407 infy_add (EV_A_ w);
1960 else 3408 else
1961#endif 3409#endif
3410 {
1962 ev_timer_start (EV_A_ &w->timer); 3411 ev_timer_again (EV_A_ &w->timer);
3412 ev_unref (EV_A);
3413 }
1963 3414
1964 ev_start (EV_A_ (W)w, 1); 3415 ev_start (EV_A_ (W)w, 1);
3416
3417 EV_FREQUENT_CHECK;
1965} 3418}
1966 3419
1967void 3420void
1968ev_stat_stop (EV_P_ ev_stat *w) 3421ev_stat_stop (EV_P_ ev_stat *w)
1969{ 3422{
1970 ev_clear_pending (EV_A_ (W)w); 3423 clear_pending (EV_A_ (W)w);
1971 if (expect_false (!ev_is_active (w))) 3424 if (expect_false (!ev_is_active (w)))
1972 return; 3425 return;
1973 3426
3427 EV_FREQUENT_CHECK;
3428
1974#if EV_USE_INOTIFY 3429#if EV_USE_INOTIFY
1975 infy_del (EV_A_ w); 3430 infy_del (EV_A_ w);
1976#endif 3431#endif
3432
3433 if (ev_is_active (&w->timer))
3434 {
3435 ev_ref (EV_A);
1977 ev_timer_stop (EV_A_ &w->timer); 3436 ev_timer_stop (EV_A_ &w->timer);
3437 }
1978 3438
1979 ev_stop (EV_A_ (W)w); 3439 ev_stop (EV_A_ (W)w);
1980}
1981#endif
1982 3440
3441 EV_FREQUENT_CHECK;
3442}
3443#endif
3444
3445#if EV_IDLE_ENABLE
1983void 3446void
1984ev_idle_start (EV_P_ ev_idle *w) 3447ev_idle_start (EV_P_ ev_idle *w)
1985{ 3448{
1986 if (expect_false (ev_is_active (w))) 3449 if (expect_false (ev_is_active (w)))
1987 return; 3450 return;
1988 3451
3452 pri_adjust (EV_A_ (W)w);
3453
3454 EV_FREQUENT_CHECK;
3455
3456 {
3457 int active = ++idlecnt [ABSPRI (w)];
3458
3459 ++idleall;
1989 ev_start (EV_A_ (W)w, ++idlecnt); 3460 ev_start (EV_A_ (W)w, active);
3461
1990 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 3462 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1991 idles [idlecnt - 1] = w; 3463 idles [ABSPRI (w)][active - 1] = w;
3464 }
3465
3466 EV_FREQUENT_CHECK;
1992} 3467}
1993 3468
1994void 3469void
1995ev_idle_stop (EV_P_ ev_idle *w) 3470ev_idle_stop (EV_P_ ev_idle *w)
1996{ 3471{
1997 ev_clear_pending (EV_A_ (W)w); 3472 clear_pending (EV_A_ (W)w);
1998 if (expect_false (!ev_is_active (w))) 3473 if (expect_false (!ev_is_active (w)))
1999 return; 3474 return;
2000 3475
3476 EV_FREQUENT_CHECK;
3477
2001 { 3478 {
2002 int active = ((W)w)->active; 3479 int active = ev_active (w);
2003 idles [active - 1] = idles [--idlecnt]; 3480
2004 ((W)idles [active - 1])->active = active; 3481 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3482 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3483
3484 ev_stop (EV_A_ (W)w);
3485 --idleall;
2005 } 3486 }
2006 3487
2007 ev_stop (EV_A_ (W)w); 3488 EV_FREQUENT_CHECK;
2008} 3489}
3490#endif
2009 3491
3492#if EV_PREPARE_ENABLE
2010void 3493void
2011ev_prepare_start (EV_P_ ev_prepare *w) 3494ev_prepare_start (EV_P_ ev_prepare *w)
2012{ 3495{
2013 if (expect_false (ev_is_active (w))) 3496 if (expect_false (ev_is_active (w)))
2014 return; 3497 return;
3498
3499 EV_FREQUENT_CHECK;
2015 3500
2016 ev_start (EV_A_ (W)w, ++preparecnt); 3501 ev_start (EV_A_ (W)w, ++preparecnt);
2017 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3502 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2018 prepares [preparecnt - 1] = w; 3503 prepares [preparecnt - 1] = w;
3504
3505 EV_FREQUENT_CHECK;
2019} 3506}
2020 3507
2021void 3508void
2022ev_prepare_stop (EV_P_ ev_prepare *w) 3509ev_prepare_stop (EV_P_ ev_prepare *w)
2023{ 3510{
2024 ev_clear_pending (EV_A_ (W)w); 3511 clear_pending (EV_A_ (W)w);
2025 if (expect_false (!ev_is_active (w))) 3512 if (expect_false (!ev_is_active (w)))
2026 return; 3513 return;
2027 3514
3515 EV_FREQUENT_CHECK;
3516
2028 { 3517 {
2029 int active = ((W)w)->active; 3518 int active = ev_active (w);
3519
2030 prepares [active - 1] = prepares [--preparecnt]; 3520 prepares [active - 1] = prepares [--preparecnt];
2031 ((W)prepares [active - 1])->active = active; 3521 ev_active (prepares [active - 1]) = active;
2032 } 3522 }
2033 3523
2034 ev_stop (EV_A_ (W)w); 3524 ev_stop (EV_A_ (W)w);
2035}
2036 3525
3526 EV_FREQUENT_CHECK;
3527}
3528#endif
3529
3530#if EV_CHECK_ENABLE
2037void 3531void
2038ev_check_start (EV_P_ ev_check *w) 3532ev_check_start (EV_P_ ev_check *w)
2039{ 3533{
2040 if (expect_false (ev_is_active (w))) 3534 if (expect_false (ev_is_active (w)))
2041 return; 3535 return;
3536
3537 EV_FREQUENT_CHECK;
2042 3538
2043 ev_start (EV_A_ (W)w, ++checkcnt); 3539 ev_start (EV_A_ (W)w, ++checkcnt);
2044 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3540 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2045 checks [checkcnt - 1] = w; 3541 checks [checkcnt - 1] = w;
3542
3543 EV_FREQUENT_CHECK;
2046} 3544}
2047 3545
2048void 3546void
2049ev_check_stop (EV_P_ ev_check *w) 3547ev_check_stop (EV_P_ ev_check *w)
2050{ 3548{
2051 ev_clear_pending (EV_A_ (W)w); 3549 clear_pending (EV_A_ (W)w);
2052 if (expect_false (!ev_is_active (w))) 3550 if (expect_false (!ev_is_active (w)))
2053 return; 3551 return;
2054 3552
3553 EV_FREQUENT_CHECK;
3554
2055 { 3555 {
2056 int active = ((W)w)->active; 3556 int active = ev_active (w);
3557
2057 checks [active - 1] = checks [--checkcnt]; 3558 checks [active - 1] = checks [--checkcnt];
2058 ((W)checks [active - 1])->active = active; 3559 ev_active (checks [active - 1]) = active;
2059 } 3560 }
2060 3561
2061 ev_stop (EV_A_ (W)w); 3562 ev_stop (EV_A_ (W)w);
3563
3564 EV_FREQUENT_CHECK;
2062} 3565}
3566#endif
2063 3567
2064#if EV_EMBED_ENABLE 3568#if EV_EMBED_ENABLE
2065void noinline 3569void noinline
2066ev_embed_sweep (EV_P_ ev_embed *w) 3570ev_embed_sweep (EV_P_ ev_embed *w)
2067{ 3571{
2068 ev_loop (w->loop, EVLOOP_NONBLOCK); 3572 ev_run (w->other, EVRUN_NOWAIT);
2069} 3573}
2070 3574
2071static void 3575static void
2072embed_cb (EV_P_ ev_io *io, int revents) 3576embed_io_cb (EV_P_ ev_io *io, int revents)
2073{ 3577{
2074 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3578 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2075 3579
2076 if (ev_cb (w)) 3580 if (ev_cb (w))
2077 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3581 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2078 else 3582 else
2079 ev_embed_sweep (loop, w); 3583 ev_run (w->other, EVRUN_NOWAIT);
2080} 3584}
3585
3586static void
3587embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3588{
3589 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3590
3591 {
3592 EV_P = w->other;
3593
3594 while (fdchangecnt)
3595 {
3596 fd_reify (EV_A);
3597 ev_run (EV_A_ EVRUN_NOWAIT);
3598 }
3599 }
3600}
3601
3602static void
3603embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3604{
3605 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3606
3607 ev_embed_stop (EV_A_ w);
3608
3609 {
3610 EV_P = w->other;
3611
3612 ev_loop_fork (EV_A);
3613 ev_run (EV_A_ EVRUN_NOWAIT);
3614 }
3615
3616 ev_embed_start (EV_A_ w);
3617}
3618
3619#if 0
3620static void
3621embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3622{
3623 ev_idle_stop (EV_A_ idle);
3624}
3625#endif
2081 3626
2082void 3627void
2083ev_embed_start (EV_P_ ev_embed *w) 3628ev_embed_start (EV_P_ ev_embed *w)
2084{ 3629{
2085 if (expect_false (ev_is_active (w))) 3630 if (expect_false (ev_is_active (w)))
2086 return; 3631 return;
2087 3632
2088 { 3633 {
2089 struct ev_loop *loop = w->loop; 3634 EV_P = w->other;
2090 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3635 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2091 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3636 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2092 } 3637 }
3638
3639 EV_FREQUENT_CHECK;
2093 3640
2094 ev_set_priority (&w->io, ev_priority (w)); 3641 ev_set_priority (&w->io, ev_priority (w));
2095 ev_io_start (EV_A_ &w->io); 3642 ev_io_start (EV_A_ &w->io);
2096 3643
3644 ev_prepare_init (&w->prepare, embed_prepare_cb);
3645 ev_set_priority (&w->prepare, EV_MINPRI);
3646 ev_prepare_start (EV_A_ &w->prepare);
3647
3648 ev_fork_init (&w->fork, embed_fork_cb);
3649 ev_fork_start (EV_A_ &w->fork);
3650
3651 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3652
2097 ev_start (EV_A_ (W)w, 1); 3653 ev_start (EV_A_ (W)w, 1);
3654
3655 EV_FREQUENT_CHECK;
2098} 3656}
2099 3657
2100void 3658void
2101ev_embed_stop (EV_P_ ev_embed *w) 3659ev_embed_stop (EV_P_ ev_embed *w)
2102{ 3660{
2103 ev_clear_pending (EV_A_ (W)w); 3661 clear_pending (EV_A_ (W)w);
2104 if (expect_false (!ev_is_active (w))) 3662 if (expect_false (!ev_is_active (w)))
2105 return; 3663 return;
2106 3664
3665 EV_FREQUENT_CHECK;
3666
2107 ev_io_stop (EV_A_ &w->io); 3667 ev_io_stop (EV_A_ &w->io);
3668 ev_prepare_stop (EV_A_ &w->prepare);
3669 ev_fork_stop (EV_A_ &w->fork);
2108 3670
2109 ev_stop (EV_A_ (W)w); 3671 ev_stop (EV_A_ (W)w);
3672
3673 EV_FREQUENT_CHECK;
2110} 3674}
2111#endif 3675#endif
2112 3676
2113#if EV_FORK_ENABLE 3677#if EV_FORK_ENABLE
2114void 3678void
2115ev_fork_start (EV_P_ ev_fork *w) 3679ev_fork_start (EV_P_ ev_fork *w)
2116{ 3680{
2117 if (expect_false (ev_is_active (w))) 3681 if (expect_false (ev_is_active (w)))
2118 return; 3682 return;
3683
3684 EV_FREQUENT_CHECK;
2119 3685
2120 ev_start (EV_A_ (W)w, ++forkcnt); 3686 ev_start (EV_A_ (W)w, ++forkcnt);
2121 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3687 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2122 forks [forkcnt - 1] = w; 3688 forks [forkcnt - 1] = w;
3689
3690 EV_FREQUENT_CHECK;
2123} 3691}
2124 3692
2125void 3693void
2126ev_fork_stop (EV_P_ ev_fork *w) 3694ev_fork_stop (EV_P_ ev_fork *w)
2127{ 3695{
2128 ev_clear_pending (EV_A_ (W)w); 3696 clear_pending (EV_A_ (W)w);
2129 if (expect_false (!ev_is_active (w))) 3697 if (expect_false (!ev_is_active (w)))
2130 return; 3698 return;
2131 3699
3700 EV_FREQUENT_CHECK;
3701
2132 { 3702 {
2133 int active = ((W)w)->active; 3703 int active = ev_active (w);
3704
2134 forks [active - 1] = forks [--forkcnt]; 3705 forks [active - 1] = forks [--forkcnt];
2135 ((W)forks [active - 1])->active = active; 3706 ev_active (forks [active - 1]) = active;
2136 } 3707 }
2137 3708
2138 ev_stop (EV_A_ (W)w); 3709 ev_stop (EV_A_ (W)w);
3710
3711 EV_FREQUENT_CHECK;
3712}
3713#endif
3714
3715#if EV_CLEANUP_ENABLE
3716void
3717ev_cleanup_start (EV_P_ ev_cleanup *w)
3718{
3719 if (expect_false (ev_is_active (w)))
3720 return;
3721
3722 EV_FREQUENT_CHECK;
3723
3724 ev_start (EV_A_ (W)w, ++cleanupcnt);
3725 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3726 cleanups [cleanupcnt - 1] = w;
3727
3728 /* cleanup watchers should never keep a refcount on the loop */
3729 ev_unref (EV_A);
3730 EV_FREQUENT_CHECK;
3731}
3732
3733void
3734ev_cleanup_stop (EV_P_ ev_cleanup *w)
3735{
3736 clear_pending (EV_A_ (W)w);
3737 if (expect_false (!ev_is_active (w)))
3738 return;
3739
3740 EV_FREQUENT_CHECK;
3741 ev_ref (EV_A);
3742
3743 {
3744 int active = ev_active (w);
3745
3746 cleanups [active - 1] = cleanups [--cleanupcnt];
3747 ev_active (cleanups [active - 1]) = active;
3748 }
3749
3750 ev_stop (EV_A_ (W)w);
3751
3752 EV_FREQUENT_CHECK;
3753}
3754#endif
3755
3756#if EV_ASYNC_ENABLE
3757void
3758ev_async_start (EV_P_ ev_async *w)
3759{
3760 if (expect_false (ev_is_active (w)))
3761 return;
3762
3763 w->sent = 0;
3764
3765 evpipe_init (EV_A);
3766
3767 EV_FREQUENT_CHECK;
3768
3769 ev_start (EV_A_ (W)w, ++asynccnt);
3770 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3771 asyncs [asynccnt - 1] = w;
3772
3773 EV_FREQUENT_CHECK;
3774}
3775
3776void
3777ev_async_stop (EV_P_ ev_async *w)
3778{
3779 clear_pending (EV_A_ (W)w);
3780 if (expect_false (!ev_is_active (w)))
3781 return;
3782
3783 EV_FREQUENT_CHECK;
3784
3785 {
3786 int active = ev_active (w);
3787
3788 asyncs [active - 1] = asyncs [--asynccnt];
3789 ev_active (asyncs [active - 1]) = active;
3790 }
3791
3792 ev_stop (EV_A_ (W)w);
3793
3794 EV_FREQUENT_CHECK;
3795}
3796
3797void
3798ev_async_send (EV_P_ ev_async *w)
3799{
3800 w->sent = 1;
3801 evpipe_write (EV_A_ &async_pending);
2139} 3802}
2140#endif 3803#endif
2141 3804
2142/*****************************************************************************/ 3805/*****************************************************************************/
2143 3806
… …
2153once_cb (EV_P_ struct ev_once *once, int revents) 3816once_cb (EV_P_ struct ev_once *once, int revents)
2154{ 3817{
2155 void (*cb)(int revents, void *arg) = once->cb; 3818 void (*cb)(int revents, void *arg) = once->cb;
2156 void *arg = once->arg; 3819 void *arg = once->arg;
2157 3820
2158 ev_io_stop (EV_A_ &once->io); 3821 ev_io_stop (EV_A_ &once->io);
2159 ev_timer_stop (EV_A_ &once->to); 3822 ev_timer_stop (EV_A_ &once->to);
2160 ev_free (once); 3823 ev_free (once);
2161 3824
2162 cb (revents, arg); 3825 cb (revents, arg);
2163} 3826}
2164 3827
2165static void 3828static void
2166once_cb_io (EV_P_ ev_io *w, int revents) 3829once_cb_io (EV_P_ ev_io *w, int revents)
2167{ 3830{
2168 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3831 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3832
3833 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2169} 3834}
2170 3835
2171static void 3836static void
2172once_cb_to (EV_P_ ev_timer *w, int revents) 3837once_cb_to (EV_P_ ev_timer *w, int revents)
2173{ 3838{
2174 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3839 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3840
3841 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2175} 3842}
2176 3843
2177void 3844void
2178ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3845ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2179{ 3846{
2180 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3847 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2181 3848
2182 if (expect_false (!once)) 3849 if (expect_false (!once))
2183 { 3850 {
2184 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3851 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2185 return; 3852 return;
2186 } 3853 }
2187 3854
2188 once->cb = cb; 3855 once->cb = cb;
2189 once->arg = arg; 3856 once->arg = arg;
… …
2201 ev_timer_set (&once->to, timeout, 0.); 3868 ev_timer_set (&once->to, timeout, 0.);
2202 ev_timer_start (EV_A_ &once->to); 3869 ev_timer_start (EV_A_ &once->to);
2203 } 3870 }
2204} 3871}
2205 3872
2206#ifdef __cplusplus 3873/*****************************************************************************/
2207} 3874
3875#if EV_WALK_ENABLE
3876void
3877ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3878{
3879 int i, j;
3880 ev_watcher_list *wl, *wn;
3881
3882 if (types & (EV_IO | EV_EMBED))
3883 for (i = 0; i < anfdmax; ++i)
3884 for (wl = anfds [i].head; wl; )
3885 {
3886 wn = wl->next;
3887
3888#if EV_EMBED_ENABLE
3889 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3890 {
3891 if (types & EV_EMBED)
3892 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3893 }
3894 else
3895#endif
3896#if EV_USE_INOTIFY
3897 if (ev_cb ((ev_io *)wl) == infy_cb)
3898 ;
3899 else
3900#endif
3901 if ((ev_io *)wl != &pipe_w)
3902 if (types & EV_IO)
3903 cb (EV_A_ EV_IO, wl);
3904
3905 wl = wn;
3906 }
3907
3908 if (types & (EV_TIMER | EV_STAT))
3909 for (i = timercnt + HEAP0; i-- > HEAP0; )
3910#if EV_STAT_ENABLE
3911 /*TODO: timer is not always active*/
3912 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3913 {
3914 if (types & EV_STAT)
3915 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3916 }
3917 else
3918#endif
3919 if (types & EV_TIMER)
3920 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3921
3922#if EV_PERIODIC_ENABLE
3923 if (types & EV_PERIODIC)
3924 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3925 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3926#endif
3927
3928#if EV_IDLE_ENABLE
3929 if (types & EV_IDLE)
3930 for (j = NUMPRI; i--; )
3931 for (i = idlecnt [j]; i--; )
3932 cb (EV_A_ EV_IDLE, idles [j][i]);
3933#endif
3934
3935#if EV_FORK_ENABLE
3936 if (types & EV_FORK)
3937 for (i = forkcnt; i--; )
3938 if (ev_cb (forks [i]) != embed_fork_cb)
3939 cb (EV_A_ EV_FORK, forks [i]);
3940#endif
3941
3942#if EV_ASYNC_ENABLE
3943 if (types & EV_ASYNC)
3944 for (i = asynccnt; i--; )
3945 cb (EV_A_ EV_ASYNC, asyncs [i]);
3946#endif
3947
3948#if EV_PREPARE_ENABLE
3949 if (types & EV_PREPARE)
3950 for (i = preparecnt; i--; )
3951# if EV_EMBED_ENABLE
3952 if (ev_cb (prepares [i]) != embed_prepare_cb)
2208#endif 3953# endif
3954 cb (EV_A_ EV_PREPARE, prepares [i]);
3955#endif
2209 3956
3957#if EV_CHECK_ENABLE
3958 if (types & EV_CHECK)
3959 for (i = checkcnt; i--; )
3960 cb (EV_A_ EV_CHECK, checks [i]);
3961#endif
3962
3963#if EV_SIGNAL_ENABLE
3964 if (types & EV_SIGNAL)
3965 for (i = 0; i < EV_NSIG - 1; ++i)
3966 for (wl = signals [i].head; wl; )
3967 {
3968 wn = wl->next;
3969 cb (EV_A_ EV_SIGNAL, wl);
3970 wl = wn;
3971 }
3972#endif
3973
3974#if EV_CHILD_ENABLE
3975 if (types & EV_CHILD)
3976 for (i = (EV_PID_HASHSIZE); i--; )
3977 for (wl = childs [i]; wl; )
3978 {
3979 wn = wl->next;
3980 cb (EV_A_ EV_CHILD, wl);
3981 wl = wn;
3982 }
3983#endif
3984/* EV_STAT 0x00001000 /* stat data changed */
3985/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3986}
3987#endif
3988
3989#if EV_MULTIPLICITY
3990 #include "ev_wrap.h"
3991#endif
3992
3993EV_CPP(})
3994

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