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Comparing libev/ev.c (file contents):
Revision 1.142 by root, Tue Nov 27 06:19:08 2007 UTC vs.
Revision 1.377 by root, Wed Jun 8 13:11:55 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
138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
99#endif 145# endif
100 146
101#include <math.h> 147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
102#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
103#include <fcntl.h> 169#include <fcntl.h>
104#include <stddef.h> 170#include <stddef.h>
105 171
106#include <stdio.h> 172#include <stdio.h>
107 173
108#include <assert.h> 174#include <assert.h>
109#include <errno.h> 175#include <errno.h>
110#include <sys/types.h> 176#include <sys/types.h>
111#include <time.h> 177#include <time.h>
178#include <limits.h>
112 179
113#include <signal.h> 180#include <signal.h>
181
182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188EV_CPP(extern "C" {)
114 189
115#ifndef _WIN32 190#ifndef _WIN32
116# include <sys/time.h> 191# include <sys/time.h>
117# include <sys/wait.h> 192# include <sys/wait.h>
118# include <unistd.h> 193# include <unistd.h>
119#else 194#else
195# include <io.h>
120# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
121# include <windows.h> 197# include <windows.h>
122# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
123# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
124# 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
125#endif 251# endif
126 252#endif
127/**/
128 253
129#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
130# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
259# endif
131#endif 260#endif
132 261
133#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
134# 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
135#endif 272#endif
136 273
137#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
138# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
139#endif 276#endif
140 277
141#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
142# ifdef _WIN32 279# ifdef _WIN32
143# define EV_USE_POLL 0 280# define EV_USE_POLL 0
144# else 281# else
145# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
146# endif 283# endif
147#endif 284#endif
148 285
149#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
150# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
291# endif
151#endif 292#endif
152 293
153#ifndef EV_USE_KQUEUE 294#ifndef EV_USE_KQUEUE
154# define EV_USE_KQUEUE 0 295# define EV_USE_KQUEUE 0
155#endif 296#endif
156 297
157#ifndef EV_USE_PORT 298#ifndef EV_USE_PORT
158# define EV_USE_PORT 0 299# define EV_USE_PORT 0
159#endif 300#endif
160 301
161/**/ 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
306# define EV_USE_INOTIFY 0
307# endif
308#endif
309
310#ifndef EV_PID_HASHSIZE
311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 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
321# else
322# define EV_USE_EVENTFD 0
323# endif
324#endif
325
326#ifndef EV_USE_SIGNALFD
327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
328# define EV_USE_SIGNALFD EV_FEATURE_OS
329# else
330# define EV_USE_SIGNALFD 0
331# endif
332#endif
333
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
162 373
163#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
164# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
165# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
166#endif 377#endif
… …
168#ifndef CLOCK_REALTIME 379#ifndef CLOCK_REALTIME
169# undef EV_USE_REALTIME 380# undef EV_USE_REALTIME
170# define EV_USE_REALTIME 0 381# define EV_USE_REALTIME 0
171#endif 382#endif
172 383
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
173#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
174# include <winsock.h> 407# include <winsock.h>
175#endif 408#endif
176 409
410#if EV_USE_EVENTFD
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
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
425
426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
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};
446#endif
447
177/**/ 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 */
178 462
179#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) */
180#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) */
181#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
183 465
184#ifdef EV_H 466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
185# include EV_H 467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
186#else
187# include "ev.h"
188#endif
189 468
190#if __GNUC__ >= 3 469#if __GNUC__ >= 4
191# define expect(expr,value) __builtin_expect ((expr),(value)) 470# define expect(expr,value) __builtin_expect ((expr),(value))
192# define inline_size static inline /* inline for codesize */
193# if EV_MINIMAL
194# define noinline __attribute__ ((noinline)) 471# define noinline __attribute__ ((noinline))
195# define inline_speed static noinline
196# else
197# define noinline
198# define inline_speed static inline
199# endif
200#else 472#else
201# define expect(expr,value) (expr) 473# define expect(expr,value) (expr)
202# define inline_speed static
203# define inline_minimal static
204# define noinline 474# define noinline
475# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
476# define inline
477# endif
205#endif 478#endif
206 479
207#define expect_false(expr) expect ((expr) != 0, 0) 480#define expect_false(expr) expect ((expr) != 0, 0)
208#define expect_true(expr) expect ((expr) != 0, 1) 481#define expect_true(expr) expect ((expr) != 0, 1)
482#define inline_size static inline
209 483
484#if EV_FEATURE_CODE
485# define inline_speed static inline
486#else
487# define inline_speed static noinline
488#endif
489
210#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
211#define ABSPRI(w) ((w)->priority - EV_MINPRI) 495# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
496#endif
212 497
213#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 498#define EMPTY /* required for microsofts broken pseudo-c compiler */
214#define EMPTY2(a,b) /* used to suppress some warnings */ 499#define EMPTY2(a,b) /* used to suppress some warnings */
215 500
216typedef ev_watcher *W; 501typedef ev_watcher *W;
217typedef ev_watcher_list *WL; 502typedef ev_watcher_list *WL;
218typedef ev_watcher_time *WT; 503typedef ev_watcher_time *WT;
219 504
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
220static 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
221 527
222#ifdef _WIN32 528#ifdef _WIN32
223# include "ev_win32.c" 529# include "ev_win32.c"
224#endif 530#endif
225 531
226/*****************************************************************************/ 532/*****************************************************************************/
227 533
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
228static void (*syserr_cb)(const char *msg); 632static void (*syserr_cb)(const char *msg);
229 633
230void 634void
231ev_set_syserr_cb (void (*cb)(const char *msg)) 635ev_set_syserr_cb (void (*cb)(const char *msg))
232{ 636{
233 syserr_cb = cb; 637 syserr_cb = cb;
234} 638}
235 639
236static void noinline 640static void noinline
237syserr (const char *msg) 641ev_syserr (const char *msg)
238{ 642{
239 if (!msg) 643 if (!msg)
240 msg = "(libev) system error"; 644 msg = "(libev) system error";
241 645
242 if (syserr_cb) 646 if (syserr_cb)
243 syserr_cb (msg); 647 syserr_cb (msg);
244 else 648 else
245 { 649 {
650#if EV_AVOID_STDIO
651 ev_printerr (msg);
652 ev_printerr (": ");
653 ev_printerr (strerror (errno));
654 ev_printerr ("\n");
655#else
246 perror (msg); 656 perror (msg);
657#endif
247 abort (); 658 abort ();
248 } 659 }
249} 660}
250 661
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
251static void *(*alloc)(void *ptr, long size); 681static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
252 682
253void 683void
254ev_set_allocator (void *(*cb)(void *ptr, long size)) 684ev_set_allocator (void *(*cb)(void *ptr, long size))
255{ 685{
256 alloc = cb; 686 alloc = cb;
257} 687}
258 688
259static void * 689inline_speed void *
260ev_realloc (void *ptr, long size) 690ev_realloc (void *ptr, long size)
261{ 691{
262 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 692 ptr = alloc (ptr, size);
263 693
264 if (!ptr && size) 694 if (!ptr && size)
265 { 695 {
696#if EV_AVOID_STDIO
697 ev_printerr ("(libev) memory allocation failed, aborting.\n");
698#else
266 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 699 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
700#endif
267 abort (); 701 abort ();
268 } 702 }
269 703
270 return ptr; 704 return ptr;
271} 705}
… …
273#define ev_malloc(size) ev_realloc (0, (size)) 707#define ev_malloc(size) ev_realloc (0, (size))
274#define ev_free(ptr) ev_realloc ((ptr), 0) 708#define ev_free(ptr) ev_realloc ((ptr), 0)
275 709
276/*****************************************************************************/ 710/*****************************************************************************/
277 711
712/* set in reify when reification needed */
713#define EV_ANFD_REIFY 1
714
715/* file descriptor info structure */
278typedef struct 716typedef struct
279{ 717{
280 WL head; 718 WL head;
281 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 */
282 unsigned char reify; 722 unsigned char unused;
723#if EV_USE_EPOLL
724 unsigned int egen; /* generation counter to counter epoll bugs */
725#endif
283#if EV_SELECT_IS_WINSOCKET 726#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
284 SOCKET handle; 727 SOCKET handle;
285#endif 728#endif
729#if EV_USE_IOCP
730 OVERLAPPED or, ow;
731#endif
286} ANFD; 732} ANFD;
287 733
734/* stores the pending event set for a given watcher */
288typedef struct 735typedef struct
289{ 736{
290 W w; 737 W w;
291 int events; 738 int events; /* the pending event set for the given watcher */
292} ANPENDING; 739} ANPENDING;
740
741#if EV_USE_INOTIFY
742/* hash table entry per inotify-id */
743typedef struct
744{
745 WL head;
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)
767#endif
293 768
294#if EV_MULTIPLICITY 769#if EV_MULTIPLICITY
295 770
296 struct ev_loop 771 struct ev_loop
297 { 772 {
… …
315 790
316 static int ev_default_loop_ptr; 791 static int ev_default_loop_ptr;
317 792
318#endif 793#endif
319 794
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
320/*****************************************************************************/ 807/*****************************************************************************/
321 808
809#ifndef EV_HAVE_EV_TIME
322ev_tstamp 810ev_tstamp
323ev_time (void) 811ev_time (void)
324{ 812{
325#if EV_USE_REALTIME 813#if EV_USE_REALTIME
814 if (expect_true (have_realtime))
815 {
326 struct timespec ts; 816 struct timespec ts;
327 clock_gettime (CLOCK_REALTIME, &ts); 817 clock_gettime (CLOCK_REALTIME, &ts);
328 return ts.tv_sec + ts.tv_nsec * 1e-9; 818 return ts.tv_sec + ts.tv_nsec * 1e-9;
329#else 819 }
820#endif
821
330 struct timeval tv; 822 struct timeval tv;
331 gettimeofday (&tv, 0); 823 gettimeofday (&tv, 0);
332 return tv.tv_sec + tv.tv_usec * 1e-6; 824 return tv.tv_sec + tv.tv_usec * 1e-6;
333#endif
334} 825}
826#endif
335 827
336ev_tstamp inline_size 828inline_size ev_tstamp
337get_clock (void) 829get_clock (void)
338{ 830{
339#if EV_USE_MONOTONIC 831#if EV_USE_MONOTONIC
340 if (expect_true (have_monotonic)) 832 if (expect_true (have_monotonic))
341 { 833 {
… …
354{ 846{
355 return ev_rt_now; 847 return ev_rt_now;
356} 848}
357#endif 849#endif
358 850
359#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))
360 911
361#define array_needsize(type,base,cur,cnt,init) \ 912#define array_needsize(type,base,cur,cnt,init) \
362 if (expect_false ((cnt) > cur)) \ 913 if (expect_false ((cnt) > (cur))) \
363 { \ 914 { \
364 int newcnt = cur; \ 915 int ocur_ = (cur); \
365 do \ 916 (base) = (type *)array_realloc \
366 { \ 917 (sizeof (type), (base), &(cur), (cnt)); \
367 newcnt = array_roundsize (type, newcnt << 1); \ 918 init ((base) + (ocur_), (cur) - ocur_); \
368 } \
369 while ((cnt) > newcnt); \
370 \
371 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
372 init (base + cur, newcnt - cur); \
373 cur = newcnt; \
374 } 919 }
375 920
921#if 0
376#define array_slim(type,stem) \ 922#define array_slim(type,stem) \
377 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 923 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
378 { \ 924 { \
379 stem ## max = array_roundsize (stem ## cnt >> 1); \ 925 stem ## max = array_roundsize (stem ## cnt >> 1); \
380 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 926 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
381 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 927 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
382 } 928 }
929#endif
383 930
384#define array_free(stem, idx) \ 931#define array_free(stem, idx) \
385 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
386 933
387/*****************************************************************************/ 934/*****************************************************************************/
935
936/* dummy callback for pending events */
937static void noinline
938pendingcb (EV_P_ ev_prepare *w, int revents)
939{
940}
388 941
389void noinline 942void noinline
390ev_feed_event (EV_P_ void *w, int revents) 943ev_feed_event (EV_P_ void *w, int revents)
391{ 944{
392 W w_ = (W)w; 945 W w_ = (W)w;
946 int pri = ABSPRI (w_);
393 947
394 if (expect_false (w_->pending)) 948 if (expect_false (w_->pending))
949 pendings [pri][w_->pending - 1].events |= revents;
950 else
395 { 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_;
396 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 955 pendings [pri][w_->pending - 1].events = revents;
397 return;
398 } 956 }
399
400 w_->pending = ++pendingcnt [ABSPRI (w_)];
401 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
402 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
403 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
404} 957}
405 958
406void 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
407queue_events (EV_P_ W *events, int eventcnt, int type) 975queue_events (EV_P_ W *events, int eventcnt, int type)
408{ 976{
409 int i; 977 int i;
410 978
411 for (i = 0; i < eventcnt; ++i) 979 for (i = 0; i < eventcnt; ++i)
412 ev_feed_event (EV_A_ events [i], type); 980 ev_feed_event (EV_A_ events [i], type);
413} 981}
414 982
415/*****************************************************************************/ 983/*****************************************************************************/
416 984
417void inline_size 985inline_speed void
418anfds_init (ANFD *base, int count)
419{
420 while (count--)
421 {
422 base->head = 0;
423 base->events = EV_NONE;
424 base->reify = 0;
425
426 ++base;
427 }
428}
429
430void inline_speed
431fd_event (EV_P_ int fd, int revents) 986fd_event_nocheck (EV_P_ int fd, int revents)
432{ 987{
433 ANFD *anfd = anfds + fd; 988 ANFD *anfd = anfds + fd;
434 ev_io *w; 989 ev_io *w;
435 990
436 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)
… …
440 if (ev) 995 if (ev)
441 ev_feed_event (EV_A_ (W)w, ev); 996 ev_feed_event (EV_A_ (W)w, ev);
442 } 997 }
443} 998}
444 999
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
445void 1011void
446ev_feed_fd_event (EV_P_ int fd, int revents) 1012ev_feed_fd_event (EV_P_ int fd, int revents)
447{ 1013{
1014 if (fd >= 0 && fd < anfdmax)
448 fd_event (EV_A_ fd, revents); 1015 fd_event_nocheck (EV_A_ fd, revents);
449} 1016}
450 1017
451void inline_size 1018/* make sure the external fd watch events are in-sync */
1019/* with the kernel/libev internal state */
1020inline_size void
452fd_reify (EV_P) 1021fd_reify (EV_P)
453{ 1022{
454 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
455 1049
456 for (i = 0; i < fdchangecnt; ++i) 1050 for (i = 0; i < fdchangecnt; ++i)
457 { 1051 {
458 int fd = fdchanges [i]; 1052 int fd = fdchanges [i];
459 ANFD *anfd = anfds + fd; 1053 ANFD *anfd = anfds + fd;
460 ev_io *w; 1054 ev_io *w;
461 1055
462 int events = 0; 1056 unsigned char o_events = anfd->events;
1057 unsigned char o_reify = anfd->reify;
463 1058
464 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1059 anfd->reify = 0;
465 events |= w->events;
466 1060
467#if EV_SELECT_IS_WINSOCKET 1061 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
468 if (events)
469 { 1062 {
470 unsigned long argp; 1063 anfd->events = 0;
471 anfd->handle = _get_osfhandle (fd); 1064
472 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 |= */
473 } 1070 }
474#endif
475 1071
476 anfd->reify = 0; 1072 if (o_reify & EV__IOFDSET)
477
478 backend_modify (EV_A_ fd, anfd->events, events); 1073 backend_modify (EV_A_ fd, o_events, anfd->events);
479 anfd->events = events;
480 } 1074 }
481 1075
482 fdchangecnt = 0; 1076 fdchangecnt = 0;
483} 1077}
484 1078
485void inline_size 1079/* something about the given fd changed */
1080inline_size void
486fd_change (EV_P_ int fd) 1081fd_change (EV_P_ int fd, int flags)
487{ 1082{
488 if (expect_false (anfds [fd].reify)) 1083 unsigned char reify = anfds [fd].reify;
489 return;
490
491 anfds [fd].reify = 1; 1084 anfds [fd].reify |= flags;
492 1085
1086 if (expect_true (!reify))
1087 {
493 ++fdchangecnt; 1088 ++fdchangecnt;
494 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1089 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
495 fdchanges [fdchangecnt - 1] = fd; 1090 fdchanges [fdchangecnt - 1] = fd;
1091 }
496} 1092}
497 1093
498void inline_speed 1094/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1095inline_speed void
499fd_kill (EV_P_ int fd) 1096fd_kill (EV_P_ int fd)
500{ 1097{
501 ev_io *w; 1098 ev_io *w;
502 1099
503 while ((w = (ev_io *)anfds [fd].head)) 1100 while ((w = (ev_io *)anfds [fd].head))
… …
505 ev_io_stop (EV_A_ w); 1102 ev_io_stop (EV_A_ w);
506 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);
507 } 1104 }
508} 1105}
509 1106
510int inline_size 1107/* check whether the given fd is actually valid, for error recovery */
1108inline_size int
511fd_valid (int fd) 1109fd_valid (int fd)
512{ 1110{
513#ifdef _WIN32 1111#ifdef _WIN32
514 return _get_osfhandle (fd) != -1; 1112 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
515#else 1113#else
516 return fcntl (fd, F_GETFD) != -1; 1114 return fcntl (fd, F_GETFD) != -1;
517#endif 1115#endif
518} 1116}
519 1117
… …
523{ 1121{
524 int fd; 1122 int fd;
525 1123
526 for (fd = 0; fd < anfdmax; ++fd) 1124 for (fd = 0; fd < anfdmax; ++fd)
527 if (anfds [fd].events) 1125 if (anfds [fd].events)
528 if (!fd_valid (fd) == -1 && errno == EBADF) 1126 if (!fd_valid (fd) && errno == EBADF)
529 fd_kill (EV_A_ fd); 1127 fd_kill (EV_A_ fd);
530} 1128}
531 1129
532/* 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 */
533static void noinline 1131static void noinline
… …
537 1135
538 for (fd = anfdmax; fd--; ) 1136 for (fd = anfdmax; fd--; )
539 if (anfds [fd].events) 1137 if (anfds [fd].events)
540 { 1138 {
541 fd_kill (EV_A_ fd); 1139 fd_kill (EV_A_ fd);
542 return; 1140 break;
543 } 1141 }
544} 1142}
545 1143
546/* 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 */
547static void noinline 1145static void noinline
548fd_rearm_all (EV_P) 1146fd_rearm_all (EV_P)
549{ 1147{
550 int fd; 1148 int fd;
551 1149
552 /* this should be highly optimised to not do anything but set a flag */
553 for (fd = 0; fd < anfdmax; ++fd) 1150 for (fd = 0; fd < anfdmax; ++fd)
554 if (anfds [fd].events) 1151 if (anfds [fd].events)
555 { 1152 {
556 anfds [fd].events = 0; 1153 anfds [fd].events = 0;
557 fd_change (EV_A_ fd); 1154 anfds [fd].emask = 0;
1155 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
558 } 1156 }
559} 1157}
560 1158
561/*****************************************************************************/ 1159/* used to prepare libev internal fd's */
562 1160/* this is not fork-safe */
563void inline_speed 1161inline_speed void
564upheap (WT *heap, int k)
565{
566 WT w = heap [k];
567
568 while (k && heap [k >> 1]->at > w->at)
569 {
570 heap [k] = heap [k >> 1];
571 ((W)heap [k])->active = k + 1;
572 k >>= 1;
573 }
574
575 heap [k] = w;
576 ((W)heap [k])->active = k + 1;
577
578}
579
580void inline_speed
581downheap (WT *heap, int N, int k)
582{
583 WT w = heap [k];
584
585 while (k < (N >> 1))
586 {
587 int j = k << 1;
588
589 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
590 ++j;
591
592 if (w->at <= heap [j]->at)
593 break;
594
595 heap [k] = heap [j];
596 ((W)heap [k])->active = k + 1;
597 k = j;
598 }
599
600 heap [k] = w;
601 ((W)heap [k])->active = k + 1;
602}
603
604void inline_size
605adjustheap (WT *heap, int N, int k)
606{
607 upheap (heap, k);
608 downheap (heap, N, k);
609}
610
611/*****************************************************************************/
612
613typedef struct
614{
615 WL head;
616 sig_atomic_t volatile gotsig;
617} ANSIG;
618
619static ANSIG *signals;
620static int signalmax;
621
622static int sigpipe [2];
623static sig_atomic_t volatile gotsig;
624static ev_io sigev;
625
626void inline_size
627signals_init (ANSIG *base, int count)
628{
629 while (count--)
630 {
631 base->head = 0;
632 base->gotsig = 0;
633
634 ++base;
635 }
636}
637
638static void
639sighandler (int signum)
640{
641#if _WIN32
642 signal (signum, sighandler);
643#endif
644
645 signals [signum - 1].gotsig = 1;
646
647 if (!gotsig)
648 {
649 int old_errno = errno;
650 gotsig = 1;
651 write (sigpipe [1], &signum, 1);
652 errno = old_errno;
653 }
654}
655
656void noinline
657ev_feed_signal_event (EV_P_ int signum)
658{
659 WL w;
660
661#if EV_MULTIPLICITY
662 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
663#endif
664
665 --signum;
666
667 if (signum < 0 || signum >= signalmax)
668 return;
669
670 signals [signum].gotsig = 0;
671
672 for (w = signals [signum].head; w; w = w->next)
673 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
674}
675
676static void
677sigcb (EV_P_ ev_io *iow, int revents)
678{
679 int signum;
680
681 read (sigpipe [0], &revents, 1);
682 gotsig = 0;
683
684 for (signum = signalmax; signum--; )
685 if (signals [signum].gotsig)
686 ev_feed_signal_event (EV_A_ signum + 1);
687}
688
689void inline_size
690fd_intern (int fd) 1162fd_intern (int fd)
691{ 1163{
692#ifdef _WIN32 1164#ifdef _WIN32
693 int arg = 1; 1165 unsigned long arg = 1;
694 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1166 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
695#else 1167#else
696 fcntl (fd, F_SETFD, FD_CLOEXEC); 1168 fcntl (fd, F_SETFD, FD_CLOEXEC);
697 fcntl (fd, F_SETFL, O_NONBLOCK); 1169 fcntl (fd, F_SETFL, O_NONBLOCK);
698#endif 1170#endif
699} 1171}
700 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
701static void noinline 1336static void noinline
702siginit (EV_P) 1337evpipe_init (EV_P)
703{ 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
704 fd_intern (sigpipe [0]); 1358 fd_intern (evpipe [0]);
705 fd_intern (sigpipe [1]); 1359 fd_intern (evpipe [1]);
1360 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1361 }
706 1362
707 ev_io_set (&sigev, sigpipe [0], EV_READ);
708 ev_io_start (EV_A_ &sigev); 1363 ev_io_start (EV_A_ &pipe_w);
709 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 int old_errno = errno; /* save errno because write might clobber it */
1374 char dummy;
1375
1376 *flag = 1;
1377
1378#if EV_USE_EVENTFD
1379 if (evfd >= 0)
1380 {
1381 uint64_t counter = 1;
1382 write (evfd, &counter, sizeof (uint64_t));
1383 }
1384 else
1385#endif
1386 /* win32 people keep sending patches that change this write() to send() */
1387 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1388 /* so when you think this write should be a send instead, please find out */
1389 /* where your send() is from - it's definitely not the microsoft send, and */
1390 /* tell me. thank you. */
1391 write (evpipe [1], &dummy, 1);
1392
1393 errno = old_errno;
1394 }
1395}
1396
1397/* called whenever the libev signal pipe */
1398/* got some events (signal, async) */
1399static void
1400pipecb (EV_P_ ev_io *iow, int revents)
1401{
1402 int i;
1403
1404#if EV_USE_EVENTFD
1405 if (evfd >= 0)
1406 {
1407 uint64_t counter;
1408 read (evfd, &counter, sizeof (uint64_t));
1409 }
1410 else
1411#endif
1412 {
1413 char dummy;
1414 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1415 read (evpipe [0], &dummy, 1);
1416 }
1417
1418#if EV_SIGNAL_ENABLE
1419 if (sig_pending)
1420 {
1421 sig_pending = 0;
1422
1423 for (i = EV_NSIG - 1; i--; )
1424 if (expect_false (signals [i].pending))
1425 ev_feed_signal_event (EV_A_ i + 1);
1426 }
1427#endif
1428
1429#if EV_ASYNC_ENABLE
1430 if (async_pending)
1431 {
1432 async_pending = 0;
1433
1434 for (i = asynccnt; i--; )
1435 if (asyncs [i]->sent)
1436 {
1437 asyncs [i]->sent = 0;
1438 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1439 }
1440 }
1441#endif
710} 1442}
711 1443
712/*****************************************************************************/ 1444/*****************************************************************************/
713 1445
714static ev_child *childs [PID_HASHSIZE]; 1446void
1447ev_feed_signal (int signum)
1448{
1449#if EV_MULTIPLICITY
1450 EV_P = signals [signum - 1].loop;
715 1451
1452 if (!EV_A)
1453 return;
1454#endif
1455
1456 signals [signum - 1].pending = 1;
1457 evpipe_write (EV_A_ &sig_pending);
1458}
1459
1460static void
1461ev_sighandler (int signum)
1462{
716#ifndef _WIN32 1463#ifdef _WIN32
1464 signal (signum, ev_sighandler);
1465#endif
1466
1467 ev_feed_signal (signum);
1468}
1469
1470void noinline
1471ev_feed_signal_event (EV_P_ int signum)
1472{
1473 WL w;
1474
1475 if (expect_false (signum <= 0 || signum > EV_NSIG))
1476 return;
1477
1478 --signum;
1479
1480#if EV_MULTIPLICITY
1481 /* it is permissible to try to feed a signal to the wrong loop */
1482 /* or, likely more useful, feeding a signal nobody is waiting for */
1483
1484 if (expect_false (signals [signum].loop != EV_A))
1485 return;
1486#endif
1487
1488 signals [signum].pending = 0;
1489
1490 for (w = signals [signum].head; w; w = w->next)
1491 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1492}
1493
1494#if EV_USE_SIGNALFD
1495static void
1496sigfdcb (EV_P_ ev_io *iow, int revents)
1497{
1498 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1499
1500 for (;;)
1501 {
1502 ssize_t res = read (sigfd, si, sizeof (si));
1503
1504 /* not ISO-C, as res might be -1, but works with SuS */
1505 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1506 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1507
1508 if (res < (ssize_t)sizeof (si))
1509 break;
1510 }
1511}
1512#endif
1513
1514#endif
1515
1516/*****************************************************************************/
1517
1518#if EV_CHILD_ENABLE
1519static WL childs [EV_PID_HASHSIZE];
717 1520
718static ev_signal childev; 1521static ev_signal childev;
719 1522
720void inline_speed 1523#ifndef WIFCONTINUED
1524# define WIFCONTINUED(status) 0
1525#endif
1526
1527/* handle a single child status event */
1528inline_speed void
721child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1529child_reap (EV_P_ int chain, int pid, int status)
722{ 1530{
723 ev_child *w; 1531 ev_child *w;
1532 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
724 1533
725 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1534 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1535 {
726 if (w->pid == pid || !w->pid) 1536 if ((w->pid == pid || !w->pid)
1537 && (!traced || (w->flags & 1)))
727 { 1538 {
728 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 1539 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
729 w->rpid = pid; 1540 w->rpid = pid;
730 w->rstatus = status; 1541 w->rstatus = status;
731 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1542 ev_feed_event (EV_A_ (W)w, EV_CHILD);
732 } 1543 }
1544 }
733} 1545}
734 1546
735#ifndef WCONTINUED 1547#ifndef WCONTINUED
736# define WCONTINUED 0 1548# define WCONTINUED 0
737#endif 1549#endif
738 1550
1551/* called on sigchld etc., calls waitpid */
739static void 1552static void
740childcb (EV_P_ ev_signal *sw, int revents) 1553childcb (EV_P_ ev_signal *sw, int revents)
741{ 1554{
742 int pid, status; 1555 int pid, status;
743 1556
… …
746 if (!WCONTINUED 1559 if (!WCONTINUED
747 || errno != EINVAL 1560 || errno != EINVAL
748 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1561 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
749 return; 1562 return;
750 1563
751 /* make sure we are called again until all childs have been reaped */ 1564 /* make sure we are called again until all children have been reaped */
752 /* we need to do it this way so that the callback gets called before we continue */ 1565 /* we need to do it this way so that the callback gets called before we continue */
753 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1566 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
754 1567
755 child_reap (EV_A_ sw, pid, pid, status); 1568 child_reap (EV_A_ pid, pid, status);
1569 if ((EV_PID_HASHSIZE) > 1)
756 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1570 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
757} 1571}
758 1572
759#endif 1573#endif
760 1574
761/*****************************************************************************/ 1575/*****************************************************************************/
762 1576
1577#if EV_USE_IOCP
1578# include "ev_iocp.c"
1579#endif
763#if EV_USE_PORT 1580#if EV_USE_PORT
764# include "ev_port.c" 1581# include "ev_port.c"
765#endif 1582#endif
766#if EV_USE_KQUEUE 1583#if EV_USE_KQUEUE
767# include "ev_kqueue.c" 1584# include "ev_kqueue.c"
… …
823 /* kqueue is borked on everything but netbsd apparently */ 1640 /* kqueue is borked on everything but netbsd apparently */
824 /* it usually doesn't work correctly on anything but sockets and pipes */ 1641 /* it usually doesn't work correctly on anything but sockets and pipes */
825 flags &= ~EVBACKEND_KQUEUE; 1642 flags &= ~EVBACKEND_KQUEUE;
826#endif 1643#endif
827#ifdef __APPLE__ 1644#ifdef __APPLE__
828 // flags &= ~EVBACKEND_KQUEUE; for documentation 1645 /* only select works correctly on that "unix-certified" platform */
829 flags &= ~EVBACKEND_POLL; 1646 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1647 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1648#endif
1649#ifdef __FreeBSD__
1650 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
830#endif 1651#endif
831 1652
832 return flags; 1653 return flags;
833} 1654}
834 1655
835unsigned int 1656unsigned int
836ev_embeddable_backends (void) 1657ev_embeddable_backends (void)
837{ 1658{
838 return EVBACKEND_EPOLL 1659 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
839 | EVBACKEND_KQUEUE 1660
840 | EVBACKEND_PORT; 1661 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1662 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1663 flags &= ~EVBACKEND_EPOLL;
1664
1665 return flags;
841} 1666}
842 1667
843unsigned int 1668unsigned int
844ev_backend (EV_P) 1669ev_backend (EV_P)
845{ 1670{
846 return backend; 1671 return backend;
847} 1672}
848 1673
849static void 1674#if EV_FEATURE_API
1675unsigned int
1676ev_iteration (EV_P)
1677{
1678 return loop_count;
1679}
1680
1681unsigned int
1682ev_depth (EV_P)
1683{
1684 return loop_depth;
1685}
1686
1687void
1688ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1689{
1690 io_blocktime = interval;
1691}
1692
1693void
1694ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1695{
1696 timeout_blocktime = interval;
1697}
1698
1699void
1700ev_set_userdata (EV_P_ void *data)
1701{
1702 userdata = data;
1703}
1704
1705void *
1706ev_userdata (EV_P)
1707{
1708 return userdata;
1709}
1710
1711void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1712{
1713 invoke_cb = invoke_pending_cb;
1714}
1715
1716void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1717{
1718 release_cb = release;
1719 acquire_cb = acquire;
1720}
1721#endif
1722
1723/* initialise a loop structure, must be zero-initialised */
1724static void noinline
850loop_init (EV_P_ unsigned int flags) 1725loop_init (EV_P_ unsigned int flags)
851{ 1726{
852 if (!backend) 1727 if (!backend)
853 { 1728 {
1729 origflags = flags;
1730
1731#if EV_USE_REALTIME
1732 if (!have_realtime)
1733 {
1734 struct timespec ts;
1735
1736 if (!clock_gettime (CLOCK_REALTIME, &ts))
1737 have_realtime = 1;
1738 }
1739#endif
1740
854#if EV_USE_MONOTONIC 1741#if EV_USE_MONOTONIC
1742 if (!have_monotonic)
855 { 1743 {
856 struct timespec ts; 1744 struct timespec ts;
1745
857 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1746 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
858 have_monotonic = 1; 1747 have_monotonic = 1;
859 } 1748 }
860#endif 1749#endif
861 1750
862 ev_rt_now = ev_time (); 1751 /* pid check not overridable via env */
863 mn_now = get_clock (); 1752#ifndef _WIN32
864 now_floor = mn_now; 1753 if (flags & EVFLAG_FORKCHECK)
865 rtmn_diff = ev_rt_now - mn_now; 1754 curpid = getpid ();
1755#endif
866 1756
867 if (!(flags & EVFLAG_NOENV) 1757 if (!(flags & EVFLAG_NOENV)
868 && !enable_secure () 1758 && !enable_secure ()
869 && getenv ("LIBEV_FLAGS")) 1759 && getenv ("LIBEV_FLAGS"))
870 flags = atoi (getenv ("LIBEV_FLAGS")); 1760 flags = atoi (getenv ("LIBEV_FLAGS"));
871 1761
872 if (!(flags & 0x0000ffffUL)) 1762 ev_rt_now = ev_time ();
1763 mn_now = get_clock ();
1764 now_floor = mn_now;
1765 rtmn_diff = ev_rt_now - mn_now;
1766#if EV_FEATURE_API
1767 invoke_cb = ev_invoke_pending;
1768#endif
1769
1770 io_blocktime = 0.;
1771 timeout_blocktime = 0.;
1772 backend = 0;
1773 backend_fd = -1;
1774 sig_pending = 0;
1775#if EV_ASYNC_ENABLE
1776 async_pending = 0;
1777#endif
1778#if EV_USE_INOTIFY
1779 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1780#endif
1781#if EV_USE_SIGNALFD
1782 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1783#endif
1784
1785 if (!(flags & EVBACKEND_MASK))
873 flags |= ev_recommended_backends (); 1786 flags |= ev_recommended_backends ();
874 1787
875 backend = 0; 1788#if EV_USE_IOCP
1789 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1790#endif
876#if EV_USE_PORT 1791#if EV_USE_PORT
877 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1792 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
878#endif 1793#endif
879#if EV_USE_KQUEUE 1794#if EV_USE_KQUEUE
880 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1795 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
887#endif 1802#endif
888#if EV_USE_SELECT 1803#if EV_USE_SELECT
889 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1804 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
890#endif 1805#endif
891 1806
1807 ev_prepare_init (&pending_w, pendingcb);
1808
1809#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
892 ev_init (&sigev, sigcb); 1810 ev_init (&pipe_w, pipecb);
893 ev_set_priority (&sigev, EV_MAXPRI); 1811 ev_set_priority (&pipe_w, EV_MAXPRI);
1812#endif
894 } 1813 }
895} 1814}
896 1815
897static void 1816/* free up a loop structure */
1817void
898loop_destroy (EV_P) 1818ev_loop_destroy (EV_P)
899{ 1819{
900 int i; 1820 int i;
901 1821
1822#if EV_MULTIPLICITY
1823 /* mimic free (0) */
1824 if (!EV_A)
1825 return;
1826#endif
1827
1828#if EV_CLEANUP_ENABLE
1829 /* queue cleanup watchers (and execute them) */
1830 if (expect_false (cleanupcnt))
1831 {
1832 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1833 EV_INVOKE_PENDING;
1834 }
1835#endif
1836
1837#if EV_CHILD_ENABLE
1838 if (ev_is_active (&childev))
1839 {
1840 ev_ref (EV_A); /* child watcher */
1841 ev_signal_stop (EV_A_ &childev);
1842 }
1843#endif
1844
1845 if (ev_is_active (&pipe_w))
1846 {
1847 /*ev_ref (EV_A);*/
1848 /*ev_io_stop (EV_A_ &pipe_w);*/
1849
1850#if EV_USE_EVENTFD
1851 if (evfd >= 0)
1852 close (evfd);
1853#endif
1854
1855 if (evpipe [0] >= 0)
1856 {
1857 EV_WIN32_CLOSE_FD (evpipe [0]);
1858 EV_WIN32_CLOSE_FD (evpipe [1]);
1859 }
1860 }
1861
1862#if EV_USE_SIGNALFD
1863 if (ev_is_active (&sigfd_w))
1864 close (sigfd);
1865#endif
1866
1867#if EV_USE_INOTIFY
1868 if (fs_fd >= 0)
1869 close (fs_fd);
1870#endif
1871
1872 if (backend_fd >= 0)
1873 close (backend_fd);
1874
1875#if EV_USE_IOCP
1876 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1877#endif
902#if EV_USE_PORT 1878#if EV_USE_PORT
903 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1879 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
904#endif 1880#endif
905#if EV_USE_KQUEUE 1881#if EV_USE_KQUEUE
906 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1882 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
914#if EV_USE_SELECT 1890#if EV_USE_SELECT
915 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1891 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
916#endif 1892#endif
917 1893
918 for (i = NUMPRI; i--; ) 1894 for (i = NUMPRI; i--; )
1895 {
919 array_free (pending, [i]); 1896 array_free (pending, [i]);
1897#if EV_IDLE_ENABLE
1898 array_free (idle, [i]);
1899#endif
1900 }
1901
1902 ev_free (anfds); anfds = 0; anfdmax = 0;
920 1903
921 /* have to use the microsoft-never-gets-it-right macro */ 1904 /* have to use the microsoft-never-gets-it-right macro */
1905 array_free (rfeed, EMPTY);
922 array_free (fdchange, EMPTY0); 1906 array_free (fdchange, EMPTY);
923 array_free (timer, EMPTY0); 1907 array_free (timer, EMPTY);
924#if EV_PERIODIC_ENABLE 1908#if EV_PERIODIC_ENABLE
925 array_free (periodic, EMPTY0); 1909 array_free (periodic, EMPTY);
926#endif 1910#endif
1911#if EV_FORK_ENABLE
1912 array_free (fork, EMPTY);
1913#endif
1914#if EV_CLEANUP_ENABLE
927 array_free (idle, EMPTY0); 1915 array_free (cleanup, EMPTY);
1916#endif
928 array_free (prepare, EMPTY0); 1917 array_free (prepare, EMPTY);
929 array_free (check, EMPTY0); 1918 array_free (check, EMPTY);
1919#if EV_ASYNC_ENABLE
1920 array_free (async, EMPTY);
1921#endif
930 1922
931 backend = 0; 1923 backend = 0;
932}
933 1924
934static void 1925#if EV_MULTIPLICITY
1926 if (ev_is_default_loop (EV_A))
1927#endif
1928 ev_default_loop_ptr = 0;
1929#if EV_MULTIPLICITY
1930 else
1931 ev_free (EV_A);
1932#endif
1933}
1934
1935#if EV_USE_INOTIFY
1936inline_size void infy_fork (EV_P);
1937#endif
1938
1939inline_size void
935loop_fork (EV_P) 1940loop_fork (EV_P)
936{ 1941{
937#if EV_USE_PORT 1942#if EV_USE_PORT
938 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1943 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
939#endif 1944#endif
… …
941 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 1946 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
942#endif 1947#endif
943#if EV_USE_EPOLL 1948#if EV_USE_EPOLL
944 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 1949 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
945#endif 1950#endif
1951#if EV_USE_INOTIFY
1952 infy_fork (EV_A);
1953#endif
946 1954
947 if (ev_is_active (&sigev)) 1955 if (ev_is_active (&pipe_w))
948 { 1956 {
949 /* default loop */ 1957 /* this "locks" the handlers against writing to the pipe */
1958 /* while we modify the fd vars */
1959 sig_pending = 1;
1960#if EV_ASYNC_ENABLE
1961 async_pending = 1;
1962#endif
950 1963
951 ev_ref (EV_A); 1964 ev_ref (EV_A);
952 ev_io_stop (EV_A_ &sigev); 1965 ev_io_stop (EV_A_ &pipe_w);
953 close (sigpipe [0]);
954 close (sigpipe [1]);
955 1966
956 while (pipe (sigpipe)) 1967#if EV_USE_EVENTFD
957 syserr ("(libev) error creating pipe"); 1968 if (evfd >= 0)
1969 close (evfd);
1970#endif
958 1971
1972 if (evpipe [0] >= 0)
1973 {
1974 EV_WIN32_CLOSE_FD (evpipe [0]);
1975 EV_WIN32_CLOSE_FD (evpipe [1]);
1976 }
1977
1978#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
959 siginit (EV_A); 1979 evpipe_init (EV_A);
1980 /* now iterate over everything, in case we missed something */
1981 pipecb (EV_A_ &pipe_w, EV_READ);
1982#endif
960 } 1983 }
961 1984
962 postfork = 0; 1985 postfork = 0;
963} 1986}
1987
1988#if EV_MULTIPLICITY
1989
1990struct ev_loop *
1991ev_loop_new (unsigned int flags)
1992{
1993 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1994
1995 memset (EV_A, 0, sizeof (struct ev_loop));
1996 loop_init (EV_A_ flags);
1997
1998 if (ev_backend (EV_A))
1999 return EV_A;
2000
2001 ev_free (EV_A);
2002 return 0;
2003}
2004
2005#endif /* multiplicity */
2006
2007#if EV_VERIFY
2008static void noinline
2009verify_watcher (EV_P_ W w)
2010{
2011 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2012
2013 if (w->pending)
2014 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2015}
2016
2017static void noinline
2018verify_heap (EV_P_ ANHE *heap, int N)
2019{
2020 int i;
2021
2022 for (i = HEAP0; i < N + HEAP0; ++i)
2023 {
2024 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2025 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2026 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2027
2028 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2029 }
2030}
2031
2032static void noinline
2033array_verify (EV_P_ W *ws, int cnt)
2034{
2035 while (cnt--)
2036 {
2037 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2038 verify_watcher (EV_A_ ws [cnt]);
2039 }
2040}
2041#endif
2042
2043#if EV_FEATURE_API
2044void
2045ev_verify (EV_P)
2046{
2047#if EV_VERIFY
2048 int i;
2049 WL w;
2050
2051 assert (activecnt >= -1);
2052
2053 assert (fdchangemax >= fdchangecnt);
2054 for (i = 0; i < fdchangecnt; ++i)
2055 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2056
2057 assert (anfdmax >= 0);
2058 for (i = 0; i < anfdmax; ++i)
2059 for (w = anfds [i].head; w; w = w->next)
2060 {
2061 verify_watcher (EV_A_ (W)w);
2062 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2063 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2064 }
2065
2066 assert (timermax >= timercnt);
2067 verify_heap (EV_A_ timers, timercnt);
2068
2069#if EV_PERIODIC_ENABLE
2070 assert (periodicmax >= periodiccnt);
2071 verify_heap (EV_A_ periodics, periodiccnt);
2072#endif
2073
2074 for (i = NUMPRI; i--; )
2075 {
2076 assert (pendingmax [i] >= pendingcnt [i]);
2077#if EV_IDLE_ENABLE
2078 assert (idleall >= 0);
2079 assert (idlemax [i] >= idlecnt [i]);
2080 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2081#endif
2082 }
2083
2084#if EV_FORK_ENABLE
2085 assert (forkmax >= forkcnt);
2086 array_verify (EV_A_ (W *)forks, forkcnt);
2087#endif
2088
2089#if EV_CLEANUP_ENABLE
2090 assert (cleanupmax >= cleanupcnt);
2091 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2092#endif
2093
2094#if EV_ASYNC_ENABLE
2095 assert (asyncmax >= asynccnt);
2096 array_verify (EV_A_ (W *)asyncs, asynccnt);
2097#endif
2098
2099#if EV_PREPARE_ENABLE
2100 assert (preparemax >= preparecnt);
2101 array_verify (EV_A_ (W *)prepares, preparecnt);
2102#endif
2103
2104#if EV_CHECK_ENABLE
2105 assert (checkmax >= checkcnt);
2106 array_verify (EV_A_ (W *)checks, checkcnt);
2107#endif
2108
2109# if 0
2110#if EV_CHILD_ENABLE
2111 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2112 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2113#endif
2114# endif
2115#endif
2116}
2117#endif
964 2118
965#if EV_MULTIPLICITY 2119#if EV_MULTIPLICITY
966struct ev_loop * 2120struct ev_loop *
967ev_loop_new (unsigned int flags)
968{
969 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
970
971 memset (loop, 0, sizeof (struct ev_loop));
972
973 loop_init (EV_A_ flags);
974
975 if (ev_backend (EV_A))
976 return loop;
977
978 return 0;
979}
980
981void
982ev_loop_destroy (EV_P)
983{
984 loop_destroy (EV_A);
985 ev_free (loop);
986}
987
988void
989ev_loop_fork (EV_P)
990{
991 postfork = 1;
992}
993
994#endif
995
996#if EV_MULTIPLICITY
997struct ev_loop *
998ev_default_loop_init (unsigned int flags)
999#else 2121#else
1000int 2122int
2123#endif
1001ev_default_loop (unsigned int flags) 2124ev_default_loop (unsigned int flags)
1002#endif
1003{ 2125{
1004 if (sigpipe [0] == sigpipe [1])
1005 if (pipe (sigpipe))
1006 return 0;
1007
1008 if (!ev_default_loop_ptr) 2126 if (!ev_default_loop_ptr)
1009 { 2127 {
1010#if EV_MULTIPLICITY 2128#if EV_MULTIPLICITY
1011 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2129 EV_P = ev_default_loop_ptr = &default_loop_struct;
1012#else 2130#else
1013 ev_default_loop_ptr = 1; 2131 ev_default_loop_ptr = 1;
1014#endif 2132#endif
1015 2133
1016 loop_init (EV_A_ flags); 2134 loop_init (EV_A_ flags);
1017 2135
1018 if (ev_backend (EV_A)) 2136 if (ev_backend (EV_A))
1019 { 2137 {
1020 siginit (EV_A); 2138#if EV_CHILD_ENABLE
1021
1022#ifndef _WIN32
1023 ev_signal_init (&childev, childcb, SIGCHLD); 2139 ev_signal_init (&childev, childcb, SIGCHLD);
1024 ev_set_priority (&childev, EV_MAXPRI); 2140 ev_set_priority (&childev, EV_MAXPRI);
1025 ev_signal_start (EV_A_ &childev); 2141 ev_signal_start (EV_A_ &childev);
1026 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2142 ev_unref (EV_A); /* child watcher should not keep loop alive */
1027#endif 2143#endif
… …
1032 2148
1033 return ev_default_loop_ptr; 2149 return ev_default_loop_ptr;
1034} 2150}
1035 2151
1036void 2152void
1037ev_default_destroy (void) 2153ev_loop_fork (EV_P)
1038{ 2154{
1039#if EV_MULTIPLICITY 2155 postfork = 1; /* must be in line with ev_default_fork */
1040 struct ev_loop *loop = ev_default_loop_ptr;
1041#endif
1042
1043#ifndef _WIN32
1044 ev_ref (EV_A); /* child watcher */
1045 ev_signal_stop (EV_A_ &childev);
1046#endif
1047
1048 ev_ref (EV_A); /* signal watcher */
1049 ev_io_stop (EV_A_ &sigev);
1050
1051 close (sigpipe [0]); sigpipe [0] = 0;
1052 close (sigpipe [1]); sigpipe [1] = 0;
1053
1054 loop_destroy (EV_A);
1055}
1056
1057void
1058ev_default_fork (void)
1059{
1060#if EV_MULTIPLICITY
1061 struct ev_loop *loop = ev_default_loop_ptr;
1062#endif
1063
1064 if (backend)
1065 postfork = 1;
1066} 2156}
1067 2157
1068/*****************************************************************************/ 2158/*****************************************************************************/
1069 2159
1070int inline_size 2160void
1071any_pending (EV_P) 2161ev_invoke (EV_P_ void *w, int revents)
2162{
2163 EV_CB_INVOKE ((W)w, revents);
2164}
2165
2166unsigned int
2167ev_pending_count (EV_P)
1072{ 2168{
1073 int pri; 2169 int pri;
2170 unsigned int count = 0;
1074 2171
1075 for (pri = NUMPRI; pri--; ) 2172 for (pri = NUMPRI; pri--; )
1076 if (pendingcnt [pri]) 2173 count += pendingcnt [pri];
1077 return 1;
1078 2174
1079 return 0; 2175 return count;
1080} 2176}
1081 2177
1082void inline_speed 2178void noinline
1083call_pending (EV_P) 2179ev_invoke_pending (EV_P)
1084{ 2180{
1085 int pri; 2181 int pri;
1086 2182
1087 for (pri = NUMPRI; pri--; ) 2183 for (pri = NUMPRI; pri--; )
1088 while (pendingcnt [pri]) 2184 while (pendingcnt [pri])
1089 { 2185 {
1090 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2186 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1091 2187
1092 if (expect_true (p->w))
1093 {
1094 assert (("non-pending watcher on pending list", p->w->pending));
1095
1096 p->w->pending = 0; 2188 p->w->pending = 0;
1097 EV_CB_INVOKE (p->w, p->events); 2189 EV_CB_INVOKE (p->w, p->events);
1098 } 2190 EV_FREQUENT_CHECK;
1099 } 2191 }
1100} 2192}
1101 2193
1102void inline_size 2194#if EV_IDLE_ENABLE
2195/* make idle watchers pending. this handles the "call-idle */
2196/* only when higher priorities are idle" logic */
2197inline_size void
2198idle_reify (EV_P)
2199{
2200 if (expect_false (idleall))
2201 {
2202 int pri;
2203
2204 for (pri = NUMPRI; pri--; )
2205 {
2206 if (pendingcnt [pri])
2207 break;
2208
2209 if (idlecnt [pri])
2210 {
2211 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2212 break;
2213 }
2214 }
2215 }
2216}
2217#endif
2218
2219/* make timers pending */
2220inline_size void
1103timers_reify (EV_P) 2221timers_reify (EV_P)
1104{ 2222{
2223 EV_FREQUENT_CHECK;
2224
1105 while (timercnt && ((WT)timers [0])->at <= mn_now) 2225 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1106 { 2226 {
1107 ev_timer *w = timers [0]; 2227 do
1108
1109 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1110
1111 /* first reschedule or stop timer */
1112 if (w->repeat)
1113 { 2228 {
2229 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2230
2231 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2232
2233 /* first reschedule or stop timer */
2234 if (w->repeat)
2235 {
2236 ev_at (w) += w->repeat;
2237 if (ev_at (w) < mn_now)
2238 ev_at (w) = mn_now;
2239
1114 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2240 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1115 2241
1116 ((WT)w)->at += w->repeat; 2242 ANHE_at_cache (timers [HEAP0]);
1117 if (((WT)w)->at < mn_now)
1118 ((WT)w)->at = mn_now;
1119
1120 downheap ((WT *)timers, timercnt, 0); 2243 downheap (timers, timercnt, HEAP0);
2244 }
2245 else
2246 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2247
2248 EV_FREQUENT_CHECK;
2249 feed_reverse (EV_A_ (W)w);
1121 } 2250 }
1122 else 2251 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1123 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1124 2252
1125 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2253 feed_reverse_done (EV_A_ EV_TIMER);
1126 } 2254 }
1127} 2255}
1128 2256
1129#if EV_PERIODIC_ENABLE 2257#if EV_PERIODIC_ENABLE
1130void inline_size 2258
2259static void noinline
2260periodic_recalc (EV_P_ ev_periodic *w)
2261{
2262 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2263 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2264
2265 /* the above almost always errs on the low side */
2266 while (at <= ev_rt_now)
2267 {
2268 ev_tstamp nat = at + w->interval;
2269
2270 /* when resolution fails us, we use ev_rt_now */
2271 if (expect_false (nat == at))
2272 {
2273 at = ev_rt_now;
2274 break;
2275 }
2276
2277 at = nat;
2278 }
2279
2280 ev_at (w) = at;
2281}
2282
2283/* make periodics pending */
2284inline_size void
1131periodics_reify (EV_P) 2285periodics_reify (EV_P)
1132{ 2286{
2287 EV_FREQUENT_CHECK;
2288
1133 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2289 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1134 { 2290 {
1135 ev_periodic *w = periodics [0]; 2291 int feed_count = 0;
1136 2292
1137 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2293 do
1138
1139 /* first reschedule or stop timer */
1140 if (w->reschedule_cb)
1141 { 2294 {
2295 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2296
2297 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2298
2299 /* first reschedule or stop timer */
2300 if (w->reschedule_cb)
2301 {
1142 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2302 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2303
1143 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2304 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2305
2306 ANHE_at_cache (periodics [HEAP0]);
1144 downheap ((WT *)periodics, periodiccnt, 0); 2307 downheap (periodics, periodiccnt, HEAP0);
2308 }
2309 else if (w->interval)
2310 {
2311 periodic_recalc (EV_A_ w);
2312 ANHE_at_cache (periodics [HEAP0]);
2313 downheap (periodics, periodiccnt, HEAP0);
2314 }
2315 else
2316 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2317
2318 EV_FREQUENT_CHECK;
2319 feed_reverse (EV_A_ (W)w);
1145 } 2320 }
1146 else if (w->interval) 2321 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1147 {
1148 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1149 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1150 downheap ((WT *)periodics, periodiccnt, 0);
1151 }
1152 else
1153 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1154 2322
1155 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2323 feed_reverse_done (EV_A_ EV_PERIODIC);
1156 } 2324 }
1157} 2325}
1158 2326
2327/* simply recalculate all periodics */
2328/* TODO: maybe ensure that at least one event happens when jumping forward? */
1159static void noinline 2329static void noinline
1160periodics_reschedule (EV_P) 2330periodics_reschedule (EV_P)
1161{ 2331{
1162 int i; 2332 int i;
1163 2333
1164 /* adjust periodics after time jump */ 2334 /* adjust periodics after time jump */
1165 for (i = 0; i < periodiccnt; ++i) 2335 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1166 { 2336 {
1167 ev_periodic *w = periodics [i]; 2337 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1168 2338
1169 if (w->reschedule_cb) 2339 if (w->reschedule_cb)
1170 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2340 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1171 else if (w->interval) 2341 else if (w->interval)
1172 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2342 periodic_recalc (EV_A_ w);
2343
2344 ANHE_at_cache (periodics [i]);
2345 }
2346
2347 reheap (periodics, periodiccnt);
2348}
2349#endif
2350
2351/* adjust all timers by a given offset */
2352static void noinline
2353timers_reschedule (EV_P_ ev_tstamp adjust)
2354{
2355 int i;
2356
2357 for (i = 0; i < timercnt; ++i)
1173 } 2358 {
1174 2359 ANHE *he = timers + i + HEAP0;
1175 /* now rebuild the heap */ 2360 ANHE_w (*he)->at += adjust;
1176 for (i = periodiccnt >> 1; i--; ) 2361 ANHE_at_cache (*he);
1177 downheap ((WT *)periodics, periodiccnt, i); 2362 }
1178} 2363}
1179#endif
1180 2364
1181int inline_size 2365/* fetch new monotonic and realtime times from the kernel */
1182time_update_monotonic (EV_P) 2366/* also detect if there was a timejump, and act accordingly */
2367inline_speed void
2368time_update (EV_P_ ev_tstamp max_block)
1183{ 2369{
2370#if EV_USE_MONOTONIC
2371 if (expect_true (have_monotonic))
2372 {
2373 int i;
2374 ev_tstamp odiff = rtmn_diff;
2375
1184 mn_now = get_clock (); 2376 mn_now = get_clock ();
1185 2377
2378 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2379 /* interpolate in the meantime */
1186 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2380 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1187 { 2381 {
1188 ev_rt_now = rtmn_diff + mn_now; 2382 ev_rt_now = rtmn_diff + mn_now;
1189 return 0; 2383 return;
1190 } 2384 }
1191 else 2385
1192 {
1193 now_floor = mn_now; 2386 now_floor = mn_now;
1194 ev_rt_now = ev_time (); 2387 ev_rt_now = ev_time ();
1195 return 1;
1196 }
1197}
1198 2388
1199void inline_size 2389 /* loop a few times, before making important decisions.
1200time_update (EV_P) 2390 * on the choice of "4": one iteration isn't enough,
1201{ 2391 * in case we get preempted during the calls to
1202 int i; 2392 * ev_time and get_clock. a second call is almost guaranteed
1203 2393 * to succeed in that case, though. and looping a few more times
1204#if EV_USE_MONOTONIC 2394 * doesn't hurt either as we only do this on time-jumps or
1205 if (expect_true (have_monotonic)) 2395 * in the unlikely event of having been preempted here.
1206 { 2396 */
1207 if (time_update_monotonic (EV_A)) 2397 for (i = 4; --i; )
1208 { 2398 {
1209 ev_tstamp odiff = rtmn_diff; 2399 ev_tstamp diff;
1210
1211 /* loop a few times, before making important decisions.
1212 * on the choice of "4": one iteration isn't enough,
1213 * in case we get preempted during the calls to
1214 * ev_time and get_clock. a second call is almost guarenteed
1215 * to succeed in that case, though. and looping a few more times
1216 * doesn't hurt either as we only do this on time-jumps or
1217 * in the unlikely event of getting preempted here.
1218 */
1219 for (i = 4; --i; )
1220 {
1221 rtmn_diff = ev_rt_now - mn_now; 2400 rtmn_diff = ev_rt_now - mn_now;
1222 2401
1223 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2402 diff = odiff - rtmn_diff;
2403
2404 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1224 return; /* all is well */ 2405 return; /* all is well */
1225 2406
1226 ev_rt_now = ev_time (); 2407 ev_rt_now = ev_time ();
1227 mn_now = get_clock (); 2408 mn_now = get_clock ();
1228 now_floor = mn_now; 2409 now_floor = mn_now;
1229 } 2410 }
1230 2411
2412 /* no timer adjustment, as the monotonic clock doesn't jump */
2413 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1231# if EV_PERIODIC_ENABLE 2414# if EV_PERIODIC_ENABLE
1232 periodics_reschedule (EV_A); 2415 periodics_reschedule (EV_A);
1233# endif 2416# endif
1234 /* no timer adjustment, as the monotonic clock doesn't jump */
1235 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1236 }
1237 } 2417 }
1238 else 2418 else
1239#endif 2419#endif
1240 { 2420 {
1241 ev_rt_now = ev_time (); 2421 ev_rt_now = ev_time ();
1242 2422
1243 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2423 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1244 { 2424 {
2425 /* adjust timers. this is easy, as the offset is the same for all of them */
2426 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1245#if EV_PERIODIC_ENABLE 2427#if EV_PERIODIC_ENABLE
1246 periodics_reschedule (EV_A); 2428 periodics_reschedule (EV_A);
1247#endif 2429#endif
1248
1249 /* adjust timers. this is easy, as the offset is the same for all */
1250 for (i = 0; i < timercnt; ++i)
1251 ((WT)timers [i])->at += ev_rt_now - mn_now;
1252 } 2430 }
1253 2431
1254 mn_now = ev_rt_now; 2432 mn_now = ev_rt_now;
1255 } 2433 }
1256} 2434}
1257 2435
1258void 2436void
1259ev_ref (EV_P)
1260{
1261 ++activecnt;
1262}
1263
1264void
1265ev_unref (EV_P)
1266{
1267 --activecnt;
1268}
1269
1270static int loop_done;
1271
1272void
1273ev_loop (EV_P_ int flags) 2437ev_run (EV_P_ int flags)
1274{ 2438{
1275 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2439#if EV_FEATURE_API
1276 ? EVUNLOOP_ONE 2440 ++loop_depth;
1277 : EVUNLOOP_CANCEL; 2441#endif
1278 2442
1279 while (activecnt) 2443 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2444
2445 loop_done = EVBREAK_CANCEL;
2446
2447 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2448
2449 do
1280 { 2450 {
2451#if EV_VERIFY >= 2
2452 ev_verify (EV_A);
2453#endif
2454
2455#ifndef _WIN32
2456 if (expect_false (curpid)) /* penalise the forking check even more */
2457 if (expect_false (getpid () != curpid))
2458 {
2459 curpid = getpid ();
2460 postfork = 1;
2461 }
2462#endif
2463
2464#if EV_FORK_ENABLE
2465 /* we might have forked, so queue fork handlers */
2466 if (expect_false (postfork))
2467 if (forkcnt)
2468 {
2469 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2470 EV_INVOKE_PENDING;
2471 }
2472#endif
2473
2474#if EV_PREPARE_ENABLE
1281 /* queue check watchers (and execute them) */ 2475 /* queue prepare watchers (and execute them) */
1282 if (expect_false (preparecnt)) 2476 if (expect_false (preparecnt))
1283 { 2477 {
1284 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2478 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1285 call_pending (EV_A); 2479 EV_INVOKE_PENDING;
1286 } 2480 }
2481#endif
2482
2483 if (expect_false (loop_done))
2484 break;
1287 2485
1288 /* we might have forked, so reify kernel state if necessary */ 2486 /* we might have forked, so reify kernel state if necessary */
1289 if (expect_false (postfork)) 2487 if (expect_false (postfork))
1290 loop_fork (EV_A); 2488 loop_fork (EV_A);
1291 2489
1292 /* update fd-related kernel structures */ 2490 /* update fd-related kernel structures */
1293 fd_reify (EV_A); 2491 fd_reify (EV_A);
1294 2492
1295 /* calculate blocking time */ 2493 /* calculate blocking time */
1296 { 2494 {
1297 double block; 2495 ev_tstamp waittime = 0.;
2496 ev_tstamp sleeptime = 0.;
1298 2497
1299 if (flags & EVLOOP_NONBLOCK || idlecnt) 2498 /* remember old timestamp for io_blocktime calculation */
1300 block = 0.; /* do not block at all */ 2499 ev_tstamp prev_mn_now = mn_now;
1301 else 2500
2501 /* update time to cancel out callback processing overhead */
2502 time_update (EV_A_ 1e100);
2503
2504 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1302 { 2505 {
1303 /* update time to cancel out callback processing overhead */
1304#if EV_USE_MONOTONIC
1305 if (expect_true (have_monotonic))
1306 time_update_monotonic (EV_A);
1307 else
1308#endif
1309 {
1310 ev_rt_now = ev_time ();
1311 mn_now = ev_rt_now;
1312 }
1313
1314 block = MAX_BLOCKTIME; 2506 waittime = MAX_BLOCKTIME;
1315 2507
1316 if (timercnt) 2508 if (timercnt)
1317 { 2509 {
1318 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2510 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1319 if (block > to) block = to; 2511 if (waittime > to) waittime = to;
1320 } 2512 }
1321 2513
1322#if EV_PERIODIC_ENABLE 2514#if EV_PERIODIC_ENABLE
1323 if (periodiccnt) 2515 if (periodiccnt)
1324 { 2516 {
1325 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2517 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1326 if (block > to) block = to; 2518 if (waittime > to) waittime = to;
1327 } 2519 }
1328#endif 2520#endif
1329 2521
2522 /* don't let timeouts decrease the waittime below timeout_blocktime */
2523 if (expect_false (waittime < timeout_blocktime))
2524 waittime = timeout_blocktime;
2525
2526 /* at this point, we NEED to wait, so we have to ensure */
2527 /* to pass a minimum nonzero value to the backend */
2528 if (expect_false (waittime < backend_mintime))
2529 waittime = backend_mintime;
2530
2531 /* extra check because io_blocktime is commonly 0 */
1330 if (expect_false (block < 0.)) block = 0.; 2532 if (expect_false (io_blocktime))
2533 {
2534 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2535
2536 if (sleeptime > waittime - backend_mintime)
2537 sleeptime = waittime - backend_mintime;
2538
2539 if (expect_true (sleeptime > 0.))
2540 {
2541 ev_sleep (sleeptime);
2542 waittime -= sleeptime;
2543 }
2544 }
1331 } 2545 }
1332 2546
2547#if EV_FEATURE_API
2548 ++loop_count;
2549#endif
2550 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1333 backend_poll (EV_A_ block); 2551 backend_poll (EV_A_ waittime);
2552 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2553
2554 /* update ev_rt_now, do magic */
2555 time_update (EV_A_ waittime + sleeptime);
1334 } 2556 }
1335
1336 /* update ev_rt_now, do magic */
1337 time_update (EV_A);
1338 2557
1339 /* queue pending timers and reschedule them */ 2558 /* queue pending timers and reschedule them */
1340 timers_reify (EV_A); /* relative timers called last */ 2559 timers_reify (EV_A); /* relative timers called last */
1341#if EV_PERIODIC_ENABLE 2560#if EV_PERIODIC_ENABLE
1342 periodics_reify (EV_A); /* absolute timers called first */ 2561 periodics_reify (EV_A); /* absolute timers called first */
1343#endif 2562#endif
1344 2563
2564#if EV_IDLE_ENABLE
1345 /* queue idle watchers unless other events are pending */ 2565 /* queue idle watchers unless other events are pending */
1346 if (idlecnt && !any_pending (EV_A)) 2566 idle_reify (EV_A);
1347 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2567#endif
1348 2568
2569#if EV_CHECK_ENABLE
1349 /* queue check watchers, to be executed first */ 2570 /* queue check watchers, to be executed first */
1350 if (expect_false (checkcnt)) 2571 if (expect_false (checkcnt))
1351 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2572 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2573#endif
1352 2574
1353 call_pending (EV_A); 2575 EV_INVOKE_PENDING;
1354
1355 if (expect_false (loop_done))
1356 break;
1357 } 2576 }
2577 while (expect_true (
2578 activecnt
2579 && !loop_done
2580 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2581 ));
1358 2582
1359 if (loop_done == EVUNLOOP_ONE) 2583 if (loop_done == EVBREAK_ONE)
1360 loop_done = EVUNLOOP_CANCEL; 2584 loop_done = EVBREAK_CANCEL;
1361}
1362 2585
2586#if EV_FEATURE_API
2587 --loop_depth;
2588#endif
2589}
2590
1363void 2591void
1364ev_unloop (EV_P_ int how) 2592ev_break (EV_P_ int how)
1365{ 2593{
1366 loop_done = how; 2594 loop_done = how;
1367} 2595}
1368 2596
2597void
2598ev_ref (EV_P)
2599{
2600 ++activecnt;
2601}
2602
2603void
2604ev_unref (EV_P)
2605{
2606 --activecnt;
2607}
2608
2609void
2610ev_now_update (EV_P)
2611{
2612 time_update (EV_A_ 1e100);
2613}
2614
2615void
2616ev_suspend (EV_P)
2617{
2618 ev_now_update (EV_A);
2619}
2620
2621void
2622ev_resume (EV_P)
2623{
2624 ev_tstamp mn_prev = mn_now;
2625
2626 ev_now_update (EV_A);
2627 timers_reschedule (EV_A_ mn_now - mn_prev);
2628#if EV_PERIODIC_ENABLE
2629 /* TODO: really do this? */
2630 periodics_reschedule (EV_A);
2631#endif
2632}
2633
1369/*****************************************************************************/ 2634/*****************************************************************************/
2635/* singly-linked list management, used when the expected list length is short */
1370 2636
1371void inline_size 2637inline_size void
1372wlist_add (WL *head, WL elem) 2638wlist_add (WL *head, WL elem)
1373{ 2639{
1374 elem->next = *head; 2640 elem->next = *head;
1375 *head = elem; 2641 *head = elem;
1376} 2642}
1377 2643
1378void inline_size 2644inline_size void
1379wlist_del (WL *head, WL elem) 2645wlist_del (WL *head, WL elem)
1380{ 2646{
1381 while (*head) 2647 while (*head)
1382 { 2648 {
1383 if (*head == elem) 2649 if (expect_true (*head == elem))
1384 { 2650 {
1385 *head = elem->next; 2651 *head = elem->next;
1386 return; 2652 break;
1387 } 2653 }
1388 2654
1389 head = &(*head)->next; 2655 head = &(*head)->next;
1390 } 2656 }
1391} 2657}
1392 2658
1393void inline_speed 2659/* internal, faster, version of ev_clear_pending */
2660inline_speed void
1394ev_clear_pending (EV_P_ W w) 2661clear_pending (EV_P_ W w)
1395{ 2662{
1396 if (w->pending) 2663 if (w->pending)
1397 { 2664 {
1398 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2665 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1399 w->pending = 0; 2666 w->pending = 0;
1400 } 2667 }
1401} 2668}
1402 2669
1403void inline_speed 2670int
2671ev_clear_pending (EV_P_ void *w)
2672{
2673 W w_ = (W)w;
2674 int pending = w_->pending;
2675
2676 if (expect_true (pending))
2677 {
2678 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2679 p->w = (W)&pending_w;
2680 w_->pending = 0;
2681 return p->events;
2682 }
2683 else
2684 return 0;
2685}
2686
2687inline_size void
2688pri_adjust (EV_P_ W w)
2689{
2690 int pri = ev_priority (w);
2691 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2692 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2693 ev_set_priority (w, pri);
2694}
2695
2696inline_speed void
1404ev_start (EV_P_ W w, int active) 2697ev_start (EV_P_ W w, int active)
1405{ 2698{
1406 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2699 pri_adjust (EV_A_ w);
1407 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1408
1409 w->active = active; 2700 w->active = active;
1410 ev_ref (EV_A); 2701 ev_ref (EV_A);
1411} 2702}
1412 2703
1413void inline_size 2704inline_size void
1414ev_stop (EV_P_ W w) 2705ev_stop (EV_P_ W w)
1415{ 2706{
1416 ev_unref (EV_A); 2707 ev_unref (EV_A);
1417 w->active = 0; 2708 w->active = 0;
1418} 2709}
1419 2710
1420/*****************************************************************************/ 2711/*****************************************************************************/
1421 2712
1422void 2713void noinline
1423ev_io_start (EV_P_ ev_io *w) 2714ev_io_start (EV_P_ ev_io *w)
1424{ 2715{
1425 int fd = w->fd; 2716 int fd = w->fd;
1426 2717
1427 if (expect_false (ev_is_active (w))) 2718 if (expect_false (ev_is_active (w)))
1428 return; 2719 return;
1429 2720
1430 assert (("ev_io_start called with negative fd", fd >= 0)); 2721 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2722 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2723
2724 EV_FREQUENT_CHECK;
1431 2725
1432 ev_start (EV_A_ (W)w, 1); 2726 ev_start (EV_A_ (W)w, 1);
1433 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2727 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1434 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2728 wlist_add (&anfds[fd].head, (WL)w);
1435 2729
1436 fd_change (EV_A_ fd); 2730 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1437} 2731 w->events &= ~EV__IOFDSET;
1438 2732
1439void 2733 EV_FREQUENT_CHECK;
2734}
2735
2736void noinline
1440ev_io_stop (EV_P_ ev_io *w) 2737ev_io_stop (EV_P_ ev_io *w)
1441{ 2738{
1442 ev_clear_pending (EV_A_ (W)w); 2739 clear_pending (EV_A_ (W)w);
1443 if (expect_false (!ev_is_active (w))) 2740 if (expect_false (!ev_is_active (w)))
1444 return; 2741 return;
1445 2742
1446 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2743 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1447 2744
2745 EV_FREQUENT_CHECK;
2746
1448 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2747 wlist_del (&anfds[w->fd].head, (WL)w);
1449 ev_stop (EV_A_ (W)w); 2748 ev_stop (EV_A_ (W)w);
1450 2749
1451 fd_change (EV_A_ w->fd); 2750 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1452}
1453 2751
1454void 2752 EV_FREQUENT_CHECK;
2753}
2754
2755void noinline
1455ev_timer_start (EV_P_ ev_timer *w) 2756ev_timer_start (EV_P_ ev_timer *w)
1456{ 2757{
1457 if (expect_false (ev_is_active (w))) 2758 if (expect_false (ev_is_active (w)))
1458 return; 2759 return;
1459 2760
1460 ((WT)w)->at += mn_now; 2761 ev_at (w) += mn_now;
1461 2762
1462 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2763 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1463 2764
2765 EV_FREQUENT_CHECK;
2766
2767 ++timercnt;
1464 ev_start (EV_A_ (W)w, ++timercnt); 2768 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1465 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2769 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1466 timers [timercnt - 1] = w; 2770 ANHE_w (timers [ev_active (w)]) = (WT)w;
1467 upheap ((WT *)timers, timercnt - 1); 2771 ANHE_at_cache (timers [ev_active (w)]);
2772 upheap (timers, ev_active (w));
1468 2773
2774 EV_FREQUENT_CHECK;
2775
1469 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2776 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1470} 2777}
1471 2778
1472void 2779void noinline
1473ev_timer_stop (EV_P_ ev_timer *w) 2780ev_timer_stop (EV_P_ ev_timer *w)
1474{ 2781{
1475 ev_clear_pending (EV_A_ (W)w); 2782 clear_pending (EV_A_ (W)w);
1476 if (expect_false (!ev_is_active (w))) 2783 if (expect_false (!ev_is_active (w)))
1477 return; 2784 return;
1478 2785
2786 EV_FREQUENT_CHECK;
2787
2788 {
2789 int active = ev_active (w);
2790
1479 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2791 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1480 2792
2793 --timercnt;
2794
1481 if (expect_true (((W)w)->active < timercnt--)) 2795 if (expect_true (active < timercnt + HEAP0))
1482 { 2796 {
1483 timers [((W)w)->active - 1] = timers [timercnt]; 2797 timers [active] = timers [timercnt + HEAP0];
1484 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2798 adjustheap (timers, timercnt, active);
1485 } 2799 }
2800 }
1486 2801
1487 ((WT)w)->at -= mn_now; 2802 ev_at (w) -= mn_now;
1488 2803
1489 ev_stop (EV_A_ (W)w); 2804 ev_stop (EV_A_ (W)w);
1490}
1491 2805
1492void 2806 EV_FREQUENT_CHECK;
2807}
2808
2809void noinline
1493ev_timer_again (EV_P_ ev_timer *w) 2810ev_timer_again (EV_P_ ev_timer *w)
1494{ 2811{
2812 EV_FREQUENT_CHECK;
2813
1495 if (ev_is_active (w)) 2814 if (ev_is_active (w))
1496 { 2815 {
1497 if (w->repeat) 2816 if (w->repeat)
1498 { 2817 {
1499 ((WT)w)->at = mn_now + w->repeat; 2818 ev_at (w) = mn_now + w->repeat;
2819 ANHE_at_cache (timers [ev_active (w)]);
1500 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2820 adjustheap (timers, timercnt, ev_active (w));
1501 } 2821 }
1502 else 2822 else
1503 ev_timer_stop (EV_A_ w); 2823 ev_timer_stop (EV_A_ w);
1504 } 2824 }
1505 else if (w->repeat) 2825 else if (w->repeat)
1506 { 2826 {
1507 w->at = w->repeat; 2827 ev_at (w) = w->repeat;
1508 ev_timer_start (EV_A_ w); 2828 ev_timer_start (EV_A_ w);
1509 } 2829 }
2830
2831 EV_FREQUENT_CHECK;
2832}
2833
2834ev_tstamp
2835ev_timer_remaining (EV_P_ ev_timer *w)
2836{
2837 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1510} 2838}
1511 2839
1512#if EV_PERIODIC_ENABLE 2840#if EV_PERIODIC_ENABLE
1513void 2841void noinline
1514ev_periodic_start (EV_P_ ev_periodic *w) 2842ev_periodic_start (EV_P_ ev_periodic *w)
1515{ 2843{
1516 if (expect_false (ev_is_active (w))) 2844 if (expect_false (ev_is_active (w)))
1517 return; 2845 return;
1518 2846
1519 if (w->reschedule_cb) 2847 if (w->reschedule_cb)
1520 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2848 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1521 else if (w->interval) 2849 else if (w->interval)
1522 { 2850 {
1523 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2851 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1524 /* this formula differs from the one in periodic_reify because we do not always round up */ 2852 periodic_recalc (EV_A_ w);
1525 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1526 } 2853 }
2854 else
2855 ev_at (w) = w->offset;
1527 2856
2857 EV_FREQUENT_CHECK;
2858
2859 ++periodiccnt;
1528 ev_start (EV_A_ (W)w, ++periodiccnt); 2860 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1529 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2861 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1530 periodics [periodiccnt - 1] = w; 2862 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1531 upheap ((WT *)periodics, periodiccnt - 1); 2863 ANHE_at_cache (periodics [ev_active (w)]);
2864 upheap (periodics, ev_active (w));
1532 2865
2866 EV_FREQUENT_CHECK;
2867
1533 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2868 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1534} 2869}
1535 2870
1536void 2871void noinline
1537ev_periodic_stop (EV_P_ ev_periodic *w) 2872ev_periodic_stop (EV_P_ ev_periodic *w)
1538{ 2873{
1539 ev_clear_pending (EV_A_ (W)w); 2874 clear_pending (EV_A_ (W)w);
1540 if (expect_false (!ev_is_active (w))) 2875 if (expect_false (!ev_is_active (w)))
1541 return; 2876 return;
1542 2877
2878 EV_FREQUENT_CHECK;
2879
2880 {
2881 int active = ev_active (w);
2882
1543 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2883 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1544 2884
2885 --periodiccnt;
2886
1545 if (expect_true (((W)w)->active < periodiccnt--)) 2887 if (expect_true (active < periodiccnt + HEAP0))
1546 { 2888 {
1547 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2889 periodics [active] = periodics [periodiccnt + HEAP0];
1548 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2890 adjustheap (periodics, periodiccnt, active);
1549 } 2891 }
2892 }
1550 2893
1551 ev_stop (EV_A_ (W)w); 2894 ev_stop (EV_A_ (W)w);
1552}
1553 2895
1554void 2896 EV_FREQUENT_CHECK;
2897}
2898
2899void noinline
1555ev_periodic_again (EV_P_ ev_periodic *w) 2900ev_periodic_again (EV_P_ ev_periodic *w)
1556{ 2901{
1557 /* TODO: use adjustheap and recalculation */ 2902 /* TODO: use adjustheap and recalculation */
1558 ev_periodic_stop (EV_A_ w); 2903 ev_periodic_stop (EV_A_ w);
1559 ev_periodic_start (EV_A_ w); 2904 ev_periodic_start (EV_A_ w);
1560} 2905}
1561#endif 2906#endif
1562 2907
1563void 2908#ifndef SA_RESTART
2909# define SA_RESTART 0
2910#endif
2911
2912#if EV_SIGNAL_ENABLE
2913
2914void noinline
1564ev_idle_start (EV_P_ ev_idle *w) 2915ev_signal_start (EV_P_ ev_signal *w)
1565{ 2916{
1566 if (expect_false (ev_is_active (w))) 2917 if (expect_false (ev_is_active (w)))
1567 return; 2918 return;
1568 2919
2920 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2921
2922#if EV_MULTIPLICITY
2923 assert (("libev: a signal must not be attached to two different loops",
2924 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2925
2926 signals [w->signum - 1].loop = EV_A;
2927#endif
2928
2929 EV_FREQUENT_CHECK;
2930
2931#if EV_USE_SIGNALFD
2932 if (sigfd == -2)
2933 {
2934 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2935 if (sigfd < 0 && errno == EINVAL)
2936 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2937
2938 if (sigfd >= 0)
2939 {
2940 fd_intern (sigfd); /* doing it twice will not hurt */
2941
2942 sigemptyset (&sigfd_set);
2943
2944 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2945 ev_set_priority (&sigfd_w, EV_MAXPRI);
2946 ev_io_start (EV_A_ &sigfd_w);
2947 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2948 }
2949 }
2950
2951 if (sigfd >= 0)
2952 {
2953 /* TODO: check .head */
2954 sigaddset (&sigfd_set, w->signum);
2955 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2956
2957 signalfd (sigfd, &sigfd_set, 0);
2958 }
2959#endif
2960
1569 ev_start (EV_A_ (W)w, ++idlecnt); 2961 ev_start (EV_A_ (W)w, 1);
1570 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 2962 wlist_add (&signals [w->signum - 1].head, (WL)w);
1571 idles [idlecnt - 1] = w;
1572}
1573 2963
1574void 2964 if (!((WL)w)->next)
2965# if EV_USE_SIGNALFD
2966 if (sigfd < 0) /*TODO*/
2967# endif
2968 {
2969# ifdef _WIN32
2970 evpipe_init (EV_A);
2971
2972 signal (w->signum, ev_sighandler);
2973# else
2974 struct sigaction sa;
2975
2976 evpipe_init (EV_A);
2977
2978 sa.sa_handler = ev_sighandler;
2979 sigfillset (&sa.sa_mask);
2980 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2981 sigaction (w->signum, &sa, 0);
2982
2983 if (origflags & EVFLAG_NOSIGMASK)
2984 {
2985 sigemptyset (&sa.sa_mask);
2986 sigaddset (&sa.sa_mask, w->signum);
2987 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2988 }
2989#endif
2990 }
2991
2992 EV_FREQUENT_CHECK;
2993}
2994
2995void noinline
1575ev_idle_stop (EV_P_ ev_idle *w) 2996ev_signal_stop (EV_P_ ev_signal *w)
1576{ 2997{
1577 ev_clear_pending (EV_A_ (W)w); 2998 clear_pending (EV_A_ (W)w);
1578 if (expect_false (!ev_is_active (w))) 2999 if (expect_false (!ev_is_active (w)))
1579 return; 3000 return;
1580 3001
1581 { 3002 EV_FREQUENT_CHECK;
1582 int active = ((W)w)->active;
1583 idles [active - 1] = idles [--idlecnt];
1584 ((W)idles [active - 1])->active = active;
1585 }
1586 3003
3004 wlist_del (&signals [w->signum - 1].head, (WL)w);
1587 ev_stop (EV_A_ (W)w); 3005 ev_stop (EV_A_ (W)w);
1588}
1589 3006
3007 if (!signals [w->signum - 1].head)
3008 {
3009#if EV_MULTIPLICITY
3010 signals [w->signum - 1].loop = 0; /* unattach from signal */
3011#endif
3012#if EV_USE_SIGNALFD
3013 if (sigfd >= 0)
3014 {
3015 sigset_t ss;
3016
3017 sigemptyset (&ss);
3018 sigaddset (&ss, w->signum);
3019 sigdelset (&sigfd_set, w->signum);
3020
3021 signalfd (sigfd, &sigfd_set, 0);
3022 sigprocmask (SIG_UNBLOCK, &ss, 0);
3023 }
3024 else
3025#endif
3026 signal (w->signum, SIG_DFL);
3027 }
3028
3029 EV_FREQUENT_CHECK;
3030}
3031
3032#endif
3033
3034#if EV_CHILD_ENABLE
3035
1590void 3036void
1591ev_prepare_start (EV_P_ ev_prepare *w) 3037ev_child_start (EV_P_ ev_child *w)
1592{ 3038{
3039#if EV_MULTIPLICITY
3040 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3041#endif
1593 if (expect_false (ev_is_active (w))) 3042 if (expect_false (ev_is_active (w)))
1594 return; 3043 return;
1595 3044
3045 EV_FREQUENT_CHECK;
3046
1596 ev_start (EV_A_ (W)w, ++preparecnt); 3047 ev_start (EV_A_ (W)w, 1);
1597 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3048 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1598 prepares [preparecnt - 1] = w;
1599}
1600 3049
3050 EV_FREQUENT_CHECK;
3051}
3052
1601void 3053void
1602ev_prepare_stop (EV_P_ ev_prepare *w) 3054ev_child_stop (EV_P_ ev_child *w)
1603{ 3055{
1604 ev_clear_pending (EV_A_ (W)w); 3056 clear_pending (EV_A_ (W)w);
1605 if (expect_false (!ev_is_active (w))) 3057 if (expect_false (!ev_is_active (w)))
1606 return; 3058 return;
1607 3059
1608 { 3060 EV_FREQUENT_CHECK;
1609 int active = ((W)w)->active;
1610 prepares [active - 1] = prepares [--preparecnt];
1611 ((W)prepares [active - 1])->active = active;
1612 }
1613 3061
3062 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1614 ev_stop (EV_A_ (W)w); 3063 ev_stop (EV_A_ (W)w);
1615}
1616 3064
1617void 3065 EV_FREQUENT_CHECK;
1618ev_check_start (EV_P_ ev_check *w) 3066}
3067
3068#endif
3069
3070#if EV_STAT_ENABLE
3071
3072# ifdef _WIN32
3073# undef lstat
3074# define lstat(a,b) _stati64 (a,b)
3075# endif
3076
3077#define DEF_STAT_INTERVAL 5.0074891
3078#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3079#define MIN_STAT_INTERVAL 0.1074891
3080
3081static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3082
3083#if EV_USE_INOTIFY
3084
3085/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3086# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3087
3088static void noinline
3089infy_add (EV_P_ ev_stat *w)
1619{ 3090{
1620 if (expect_false (ev_is_active (w))) 3091 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);
3092
3093 if (w->wd >= 0)
3094 {
3095 struct statfs sfs;
3096
3097 /* now local changes will be tracked by inotify, but remote changes won't */
3098 /* unless the filesystem is known to be local, we therefore still poll */
3099 /* also do poll on <2.6.25, but with normal frequency */
3100
3101 if (!fs_2625)
3102 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3103 else if (!statfs (w->path, &sfs)
3104 && (sfs.f_type == 0x1373 /* devfs */
3105 || sfs.f_type == 0xEF53 /* ext2/3 */
3106 || sfs.f_type == 0x3153464a /* jfs */
3107 || sfs.f_type == 0x52654973 /* reiser3 */
3108 || sfs.f_type == 0x01021994 /* tempfs */
3109 || sfs.f_type == 0x58465342 /* xfs */))
3110 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3111 else
3112 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3113 }
3114 else
3115 {
3116 /* can't use inotify, continue to stat */
3117 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3118
3119 /* if path is not there, monitor some parent directory for speedup hints */
3120 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3121 /* but an efficiency issue only */
3122 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3123 {
3124 char path [4096];
3125 strcpy (path, w->path);
3126
3127 do
3128 {
3129 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3130 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3131
3132 char *pend = strrchr (path, '/');
3133
3134 if (!pend || pend == path)
3135 break;
3136
3137 *pend = 0;
3138 w->wd = inotify_add_watch (fs_fd, path, mask);
3139 }
3140 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3141 }
3142 }
3143
3144 if (w->wd >= 0)
3145 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3146
3147 /* now re-arm timer, if required */
3148 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3149 ev_timer_again (EV_A_ &w->timer);
3150 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3151}
3152
3153static void noinline
3154infy_del (EV_P_ ev_stat *w)
3155{
3156 int slot;
3157 int wd = w->wd;
3158
3159 if (wd < 0)
1621 return; 3160 return;
1622 3161
1623 ev_start (EV_A_ (W)w, ++checkcnt); 3162 w->wd = -2;
1624 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3163 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1625 checks [checkcnt - 1] = w; 3164 wlist_del (&fs_hash [slot].head, (WL)w);
1626}
1627 3165
1628void 3166 /* remove this watcher, if others are watching it, they will rearm */
1629ev_check_stop (EV_P_ ev_check *w) 3167 inotify_rm_watch (fs_fd, wd);
3168}
3169
3170static void noinline
3171infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1630{ 3172{
1631 ev_clear_pending (EV_A_ (W)w); 3173 if (slot < 0)
1632 if (expect_false (!ev_is_active (w))) 3174 /* overflow, need to check for all hash slots */
3175 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3176 infy_wd (EV_A_ slot, wd, ev);
3177 else
3178 {
3179 WL w_;
3180
3181 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3182 {
3183 ev_stat *w = (ev_stat *)w_;
3184 w_ = w_->next; /* lets us remove this watcher and all before it */
3185
3186 if (w->wd == wd || wd == -1)
3187 {
3188 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3189 {
3190 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3191 w->wd = -1;
3192 infy_add (EV_A_ w); /* re-add, no matter what */
3193 }
3194
3195 stat_timer_cb (EV_A_ &w->timer, 0);
3196 }
3197 }
3198 }
3199}
3200
3201static void
3202infy_cb (EV_P_ ev_io *w, int revents)
3203{
3204 char buf [EV_INOTIFY_BUFSIZE];
3205 int ofs;
3206 int len = read (fs_fd, buf, sizeof (buf));
3207
3208 for (ofs = 0; ofs < len; )
3209 {
3210 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3211 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3212 ofs += sizeof (struct inotify_event) + ev->len;
3213 }
3214}
3215
3216inline_size void
3217ev_check_2625 (EV_P)
3218{
3219 /* kernels < 2.6.25 are borked
3220 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3221 */
3222 if (ev_linux_version () < 0x020619)
1633 return; 3223 return;
1634 3224
1635 { 3225 fs_2625 = 1;
1636 int active = ((W)w)->active;
1637 checks [active - 1] = checks [--checkcnt];
1638 ((W)checks [active - 1])->active = active;
1639 }
1640
1641 ev_stop (EV_A_ (W)w);
1642} 3226}
1643 3227
1644#ifndef SA_RESTART 3228inline_size int
1645# define SA_RESTART 0 3229infy_newfd (void)
1646#endif
1647
1648void
1649ev_signal_start (EV_P_ ev_signal *w)
1650{ 3230{
1651#if EV_MULTIPLICITY 3231#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
1652 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3232 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3233 if (fd >= 0)
3234 return fd;
1653#endif 3235#endif
1654 if (expect_false (ev_is_active (w))) 3236 return inotify_init ();
3237}
3238
3239inline_size void
3240infy_init (EV_P)
3241{
3242 if (fs_fd != -2)
1655 return; 3243 return;
1656 3244
1657 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3245 fs_fd = -1;
1658 3246
1659 ev_start (EV_A_ (W)w, 1); 3247 ev_check_2625 (EV_A);
1660 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1661 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1662 3248
1663 if (!((WL)w)->next) 3249 fs_fd = infy_newfd ();
3250
3251 if (fs_fd >= 0)
3252 {
3253 fd_intern (fs_fd);
3254 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3255 ev_set_priority (&fs_w, EV_MAXPRI);
3256 ev_io_start (EV_A_ &fs_w);
3257 ev_unref (EV_A);
1664 { 3258 }
3259}
3260
3261inline_size void
3262infy_fork (EV_P)
3263{
3264 int slot;
3265
3266 if (fs_fd < 0)
3267 return;
3268
3269 ev_ref (EV_A);
3270 ev_io_stop (EV_A_ &fs_w);
3271 close (fs_fd);
3272 fs_fd = infy_newfd ();
3273
3274 if (fs_fd >= 0)
3275 {
3276 fd_intern (fs_fd);
3277 ev_io_set (&fs_w, fs_fd, EV_READ);
3278 ev_io_start (EV_A_ &fs_w);
3279 ev_unref (EV_A);
3280 }
3281
3282 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3283 {
3284 WL w_ = fs_hash [slot].head;
3285 fs_hash [slot].head = 0;
3286
3287 while (w_)
3288 {
3289 ev_stat *w = (ev_stat *)w_;
3290 w_ = w_->next; /* lets us add this watcher */
3291
3292 w->wd = -1;
3293
3294 if (fs_fd >= 0)
3295 infy_add (EV_A_ w); /* re-add, no matter what */
3296 else
3297 {
3298 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3299 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3300 ev_timer_again (EV_A_ &w->timer);
3301 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3302 }
3303 }
3304 }
3305}
3306
3307#endif
3308
1665#if _WIN32 3309#ifdef _WIN32
1666 signal (w->signum, sighandler); 3310# define EV_LSTAT(p,b) _stati64 (p, b)
1667#else 3311#else
1668 struct sigaction sa; 3312# define EV_LSTAT(p,b) lstat (p, b)
1669 sa.sa_handler = sighandler;
1670 sigfillset (&sa.sa_mask);
1671 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1672 sigaction (w->signum, &sa, 0);
1673#endif
1674 }
1675}
1676
1677void
1678ev_signal_stop (EV_P_ ev_signal *w)
1679{
1680 ev_clear_pending (EV_A_ (W)w);
1681 if (expect_false (!ev_is_active (w)))
1682 return;
1683
1684 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1685 ev_stop (EV_A_ (W)w);
1686
1687 if (!signals [w->signum - 1].head)
1688 signal (w->signum, SIG_DFL);
1689}
1690
1691void
1692ev_child_start (EV_P_ ev_child *w)
1693{
1694#if EV_MULTIPLICITY
1695 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1696#endif
1697 if (expect_false (ev_is_active (w)))
1698 return;
1699
1700 ev_start (EV_A_ (W)w, 1);
1701 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1702}
1703
1704void
1705ev_child_stop (EV_P_ ev_child *w)
1706{
1707 ev_clear_pending (EV_A_ (W)w);
1708 if (expect_false (!ev_is_active (w)))
1709 return;
1710
1711 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1712 ev_stop (EV_A_ (W)w);
1713}
1714
1715#if EV_EMBED_ENABLE
1716void noinline
1717ev_embed_sweep (EV_P_ ev_embed *w)
1718{
1719 ev_loop (w->loop, EVLOOP_NONBLOCK);
1720}
1721
1722static void
1723embed_cb (EV_P_ ev_io *io, int revents)
1724{
1725 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
1726
1727 if (ev_cb (w))
1728 ev_feed_event (EV_A_ (W)w, EV_EMBED);
1729 else
1730 ev_embed_sweep (loop, w);
1731}
1732
1733void
1734ev_embed_start (EV_P_ ev_embed *w)
1735{
1736 if (expect_false (ev_is_active (w)))
1737 return;
1738
1739 {
1740 struct ev_loop *loop = w->loop;
1741 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1742 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
1743 }
1744
1745 ev_set_priority (&w->io, ev_priority (w));
1746 ev_io_start (EV_A_ &w->io);
1747
1748 ev_start (EV_A_ (W)w, 1);
1749}
1750
1751void
1752ev_embed_stop (EV_P_ ev_embed *w)
1753{
1754 ev_clear_pending (EV_A_ (W)w);
1755 if (expect_false (!ev_is_active (w)))
1756 return;
1757
1758 ev_io_stop (EV_A_ &w->io);
1759
1760 ev_stop (EV_A_ (W)w);
1761}
1762#endif
1763
1764#if EV_STAT_ENABLE
1765
1766# ifdef _WIN32
1767# define lstat(a,b) stat(a,b)
1768# endif 3313#endif
1769 3314
1770void 3315void
1771ev_stat_stat (EV_P_ ev_stat *w) 3316ev_stat_stat (EV_P_ ev_stat *w)
1772{ 3317{
1773 if (lstat (w->path, &w->attr) < 0) 3318 if (lstat (w->path, &w->attr) < 0)
1774 w->attr.st_nlink = 0; 3319 w->attr.st_nlink = 0;
1775 else if (!w->attr.st_nlink) 3320 else if (!w->attr.st_nlink)
1776 w->attr.st_nlink = 1; 3321 w->attr.st_nlink = 1;
1777} 3322}
1778 3323
1779static void 3324static void noinline
1780stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3325stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1781{ 3326{
1782 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3327 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1783 3328
1784 /* we copy this here each the time so that */ 3329 ev_statdata prev = w->attr;
1785 /* prev has the old value when the callback gets invoked */
1786 w->prev = w->attr;
1787 ev_stat_stat (EV_A_ w); 3330 ev_stat_stat (EV_A_ w);
1788 3331
1789 if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata))) 3332 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3333 if (
3334 prev.st_dev != w->attr.st_dev
3335 || prev.st_ino != w->attr.st_ino
3336 || prev.st_mode != w->attr.st_mode
3337 || prev.st_nlink != w->attr.st_nlink
3338 || prev.st_uid != w->attr.st_uid
3339 || prev.st_gid != w->attr.st_gid
3340 || prev.st_rdev != w->attr.st_rdev
3341 || prev.st_size != w->attr.st_size
3342 || prev.st_atime != w->attr.st_atime
3343 || prev.st_mtime != w->attr.st_mtime
3344 || prev.st_ctime != w->attr.st_ctime
3345 ) {
3346 /* we only update w->prev on actual differences */
3347 /* in case we test more often than invoke the callback, */
3348 /* to ensure that prev is always different to attr */
3349 w->prev = prev;
3350
3351 #if EV_USE_INOTIFY
3352 if (fs_fd >= 0)
3353 {
3354 infy_del (EV_A_ w);
3355 infy_add (EV_A_ w);
3356 ev_stat_stat (EV_A_ w); /* avoid race... */
3357 }
3358 #endif
3359
1790 ev_feed_event (EV_A_ w, EV_STAT); 3360 ev_feed_event (EV_A_ w, EV_STAT);
3361 }
1791} 3362}
1792 3363
1793void 3364void
1794ev_stat_start (EV_P_ ev_stat *w) 3365ev_stat_start (EV_P_ ev_stat *w)
1795{ 3366{
1796 if (expect_false (ev_is_active (w))) 3367 if (expect_false (ev_is_active (w)))
1797 return; 3368 return;
1798 3369
1799 /* since we use memcmp, we need to clear any padding data etc. */
1800 memset (&w->prev, 0, sizeof (ev_statdata));
1801 memset (&w->attr, 0, sizeof (ev_statdata));
1802
1803 ev_stat_stat (EV_A_ w); 3370 ev_stat_stat (EV_A_ w);
1804 3371
3372 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3373 w->interval = MIN_STAT_INTERVAL;
3374
1805 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3375 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
1806 ev_set_priority (&w->timer, ev_priority (w)); 3376 ev_set_priority (&w->timer, ev_priority (w));
3377
3378#if EV_USE_INOTIFY
3379 infy_init (EV_A);
3380
3381 if (fs_fd >= 0)
3382 infy_add (EV_A_ w);
3383 else
3384#endif
3385 {
1807 ev_timer_start (EV_A_ &w->timer); 3386 ev_timer_again (EV_A_ &w->timer);
3387 ev_unref (EV_A);
3388 }
1808 3389
1809 ev_start (EV_A_ (W)w, 1); 3390 ev_start (EV_A_ (W)w, 1);
3391
3392 EV_FREQUENT_CHECK;
1810} 3393}
1811 3394
1812void 3395void
1813ev_stat_stop (EV_P_ ev_stat *w) 3396ev_stat_stop (EV_P_ ev_stat *w)
1814{ 3397{
1815 ev_clear_pending (EV_A_ (W)w); 3398 clear_pending (EV_A_ (W)w);
1816 if (expect_false (!ev_is_active (w))) 3399 if (expect_false (!ev_is_active (w)))
1817 return; 3400 return;
1818 3401
3402 EV_FREQUENT_CHECK;
3403
3404#if EV_USE_INOTIFY
3405 infy_del (EV_A_ w);
3406#endif
3407
3408 if (ev_is_active (&w->timer))
3409 {
3410 ev_ref (EV_A);
1819 ev_timer_stop (EV_A_ &w->timer); 3411 ev_timer_stop (EV_A_ &w->timer);
3412 }
1820 3413
1821 ev_stop (EV_A_ (W)w); 3414 ev_stop (EV_A_ (W)w);
3415
3416 EV_FREQUENT_CHECK;
3417}
3418#endif
3419
3420#if EV_IDLE_ENABLE
3421void
3422ev_idle_start (EV_P_ ev_idle *w)
3423{
3424 if (expect_false (ev_is_active (w)))
3425 return;
3426
3427 pri_adjust (EV_A_ (W)w);
3428
3429 EV_FREQUENT_CHECK;
3430
3431 {
3432 int active = ++idlecnt [ABSPRI (w)];
3433
3434 ++idleall;
3435 ev_start (EV_A_ (W)w, active);
3436
3437 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3438 idles [ABSPRI (w)][active - 1] = w;
3439 }
3440
3441 EV_FREQUENT_CHECK;
3442}
3443
3444void
3445ev_idle_stop (EV_P_ ev_idle *w)
3446{
3447 clear_pending (EV_A_ (W)w);
3448 if (expect_false (!ev_is_active (w)))
3449 return;
3450
3451 EV_FREQUENT_CHECK;
3452
3453 {
3454 int active = ev_active (w);
3455
3456 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3457 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3458
3459 ev_stop (EV_A_ (W)w);
3460 --idleall;
3461 }
3462
3463 EV_FREQUENT_CHECK;
3464}
3465#endif
3466
3467#if EV_PREPARE_ENABLE
3468void
3469ev_prepare_start (EV_P_ ev_prepare *w)
3470{
3471 if (expect_false (ev_is_active (w)))
3472 return;
3473
3474 EV_FREQUENT_CHECK;
3475
3476 ev_start (EV_A_ (W)w, ++preparecnt);
3477 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3478 prepares [preparecnt - 1] = w;
3479
3480 EV_FREQUENT_CHECK;
3481}
3482
3483void
3484ev_prepare_stop (EV_P_ ev_prepare *w)
3485{
3486 clear_pending (EV_A_ (W)w);
3487 if (expect_false (!ev_is_active (w)))
3488 return;
3489
3490 EV_FREQUENT_CHECK;
3491
3492 {
3493 int active = ev_active (w);
3494
3495 prepares [active - 1] = prepares [--preparecnt];
3496 ev_active (prepares [active - 1]) = active;
3497 }
3498
3499 ev_stop (EV_A_ (W)w);
3500
3501 EV_FREQUENT_CHECK;
3502}
3503#endif
3504
3505#if EV_CHECK_ENABLE
3506void
3507ev_check_start (EV_P_ ev_check *w)
3508{
3509 if (expect_false (ev_is_active (w)))
3510 return;
3511
3512 EV_FREQUENT_CHECK;
3513
3514 ev_start (EV_A_ (W)w, ++checkcnt);
3515 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3516 checks [checkcnt - 1] = w;
3517
3518 EV_FREQUENT_CHECK;
3519}
3520
3521void
3522ev_check_stop (EV_P_ ev_check *w)
3523{
3524 clear_pending (EV_A_ (W)w);
3525 if (expect_false (!ev_is_active (w)))
3526 return;
3527
3528 EV_FREQUENT_CHECK;
3529
3530 {
3531 int active = ev_active (w);
3532
3533 checks [active - 1] = checks [--checkcnt];
3534 ev_active (checks [active - 1]) = active;
3535 }
3536
3537 ev_stop (EV_A_ (W)w);
3538
3539 EV_FREQUENT_CHECK;
3540}
3541#endif
3542
3543#if EV_EMBED_ENABLE
3544void noinline
3545ev_embed_sweep (EV_P_ ev_embed *w)
3546{
3547 ev_run (w->other, EVRUN_NOWAIT);
3548}
3549
3550static void
3551embed_io_cb (EV_P_ ev_io *io, int revents)
3552{
3553 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3554
3555 if (ev_cb (w))
3556 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3557 else
3558 ev_run (w->other, EVRUN_NOWAIT);
3559}
3560
3561static void
3562embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3563{
3564 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3565
3566 {
3567 EV_P = w->other;
3568
3569 while (fdchangecnt)
3570 {
3571 fd_reify (EV_A);
3572 ev_run (EV_A_ EVRUN_NOWAIT);
3573 }
3574 }
3575}
3576
3577static void
3578embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3579{
3580 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3581
3582 ev_embed_stop (EV_A_ w);
3583
3584 {
3585 EV_P = w->other;
3586
3587 ev_loop_fork (EV_A);
3588 ev_run (EV_A_ EVRUN_NOWAIT);
3589 }
3590
3591 ev_embed_start (EV_A_ w);
3592}
3593
3594#if 0
3595static void
3596embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3597{
3598 ev_idle_stop (EV_A_ idle);
3599}
3600#endif
3601
3602void
3603ev_embed_start (EV_P_ ev_embed *w)
3604{
3605 if (expect_false (ev_is_active (w)))
3606 return;
3607
3608 {
3609 EV_P = w->other;
3610 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3611 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3612 }
3613
3614 EV_FREQUENT_CHECK;
3615
3616 ev_set_priority (&w->io, ev_priority (w));
3617 ev_io_start (EV_A_ &w->io);
3618
3619 ev_prepare_init (&w->prepare, embed_prepare_cb);
3620 ev_set_priority (&w->prepare, EV_MINPRI);
3621 ev_prepare_start (EV_A_ &w->prepare);
3622
3623 ev_fork_init (&w->fork, embed_fork_cb);
3624 ev_fork_start (EV_A_ &w->fork);
3625
3626 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3627
3628 ev_start (EV_A_ (W)w, 1);
3629
3630 EV_FREQUENT_CHECK;
3631}
3632
3633void
3634ev_embed_stop (EV_P_ ev_embed *w)
3635{
3636 clear_pending (EV_A_ (W)w);
3637 if (expect_false (!ev_is_active (w)))
3638 return;
3639
3640 EV_FREQUENT_CHECK;
3641
3642 ev_io_stop (EV_A_ &w->io);
3643 ev_prepare_stop (EV_A_ &w->prepare);
3644 ev_fork_stop (EV_A_ &w->fork);
3645
3646 ev_stop (EV_A_ (W)w);
3647
3648 EV_FREQUENT_CHECK;
3649}
3650#endif
3651
3652#if EV_FORK_ENABLE
3653void
3654ev_fork_start (EV_P_ ev_fork *w)
3655{
3656 if (expect_false (ev_is_active (w)))
3657 return;
3658
3659 EV_FREQUENT_CHECK;
3660
3661 ev_start (EV_A_ (W)w, ++forkcnt);
3662 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3663 forks [forkcnt - 1] = w;
3664
3665 EV_FREQUENT_CHECK;
3666}
3667
3668void
3669ev_fork_stop (EV_P_ ev_fork *w)
3670{
3671 clear_pending (EV_A_ (W)w);
3672 if (expect_false (!ev_is_active (w)))
3673 return;
3674
3675 EV_FREQUENT_CHECK;
3676
3677 {
3678 int active = ev_active (w);
3679
3680 forks [active - 1] = forks [--forkcnt];
3681 ev_active (forks [active - 1]) = active;
3682 }
3683
3684 ev_stop (EV_A_ (W)w);
3685
3686 EV_FREQUENT_CHECK;
3687}
3688#endif
3689
3690#if EV_CLEANUP_ENABLE
3691void
3692ev_cleanup_start (EV_P_ ev_cleanup *w)
3693{
3694 if (expect_false (ev_is_active (w)))
3695 return;
3696
3697 EV_FREQUENT_CHECK;
3698
3699 ev_start (EV_A_ (W)w, ++cleanupcnt);
3700 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3701 cleanups [cleanupcnt - 1] = w;
3702
3703 /* cleanup watchers should never keep a refcount on the loop */
3704 ev_unref (EV_A);
3705 EV_FREQUENT_CHECK;
3706}
3707
3708void
3709ev_cleanup_stop (EV_P_ ev_cleanup *w)
3710{
3711 clear_pending (EV_A_ (W)w);
3712 if (expect_false (!ev_is_active (w)))
3713 return;
3714
3715 EV_FREQUENT_CHECK;
3716 ev_ref (EV_A);
3717
3718 {
3719 int active = ev_active (w);
3720
3721 cleanups [active - 1] = cleanups [--cleanupcnt];
3722 ev_active (cleanups [active - 1]) = active;
3723 }
3724
3725 ev_stop (EV_A_ (W)w);
3726
3727 EV_FREQUENT_CHECK;
3728}
3729#endif
3730
3731#if EV_ASYNC_ENABLE
3732void
3733ev_async_start (EV_P_ ev_async *w)
3734{
3735 if (expect_false (ev_is_active (w)))
3736 return;
3737
3738 w->sent = 0;
3739
3740 evpipe_init (EV_A);
3741
3742 EV_FREQUENT_CHECK;
3743
3744 ev_start (EV_A_ (W)w, ++asynccnt);
3745 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3746 asyncs [asynccnt - 1] = w;
3747
3748 EV_FREQUENT_CHECK;
3749}
3750
3751void
3752ev_async_stop (EV_P_ ev_async *w)
3753{
3754 clear_pending (EV_A_ (W)w);
3755 if (expect_false (!ev_is_active (w)))
3756 return;
3757
3758 EV_FREQUENT_CHECK;
3759
3760 {
3761 int active = ev_active (w);
3762
3763 asyncs [active - 1] = asyncs [--asynccnt];
3764 ev_active (asyncs [active - 1]) = active;
3765 }
3766
3767 ev_stop (EV_A_ (W)w);
3768
3769 EV_FREQUENT_CHECK;
3770}
3771
3772void
3773ev_async_send (EV_P_ ev_async *w)
3774{
3775 w->sent = 1;
3776 evpipe_write (EV_A_ &async_pending);
1822} 3777}
1823#endif 3778#endif
1824 3779
1825/*****************************************************************************/ 3780/*****************************************************************************/
1826 3781
… …
1836once_cb (EV_P_ struct ev_once *once, int revents) 3791once_cb (EV_P_ struct ev_once *once, int revents)
1837{ 3792{
1838 void (*cb)(int revents, void *arg) = once->cb; 3793 void (*cb)(int revents, void *arg) = once->cb;
1839 void *arg = once->arg; 3794 void *arg = once->arg;
1840 3795
1841 ev_io_stop (EV_A_ &once->io); 3796 ev_io_stop (EV_A_ &once->io);
1842 ev_timer_stop (EV_A_ &once->to); 3797 ev_timer_stop (EV_A_ &once->to);
1843 ev_free (once); 3798 ev_free (once);
1844 3799
1845 cb (revents, arg); 3800 cb (revents, arg);
1846} 3801}
1847 3802
1848static void 3803static void
1849once_cb_io (EV_P_ ev_io *w, int revents) 3804once_cb_io (EV_P_ ev_io *w, int revents)
1850{ 3805{
1851 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3806 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3807
3808 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1852} 3809}
1853 3810
1854static void 3811static void
1855once_cb_to (EV_P_ ev_timer *w, int revents) 3812once_cb_to (EV_P_ ev_timer *w, int revents)
1856{ 3813{
1857 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3814 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3815
3816 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1858} 3817}
1859 3818
1860void 3819void
1861ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3820ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1862{ 3821{
1863 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3822 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1864 3823
1865 if (expect_false (!once)) 3824 if (expect_false (!once))
1866 { 3825 {
1867 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3826 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1868 return; 3827 return;
1869 } 3828 }
1870 3829
1871 once->cb = cb; 3830 once->cb = cb;
1872 once->arg = arg; 3831 once->arg = arg;
… …
1884 ev_timer_set (&once->to, timeout, 0.); 3843 ev_timer_set (&once->to, timeout, 0.);
1885 ev_timer_start (EV_A_ &once->to); 3844 ev_timer_start (EV_A_ &once->to);
1886 } 3845 }
1887} 3846}
1888 3847
1889#ifdef __cplusplus 3848/*****************************************************************************/
1890} 3849
3850#if EV_WALK_ENABLE
3851void
3852ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3853{
3854 int i, j;
3855 ev_watcher_list *wl, *wn;
3856
3857 if (types & (EV_IO | EV_EMBED))
3858 for (i = 0; i < anfdmax; ++i)
3859 for (wl = anfds [i].head; wl; )
3860 {
3861 wn = wl->next;
3862
3863#if EV_EMBED_ENABLE
3864 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3865 {
3866 if (types & EV_EMBED)
3867 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3868 }
3869 else
3870#endif
3871#if EV_USE_INOTIFY
3872 if (ev_cb ((ev_io *)wl) == infy_cb)
3873 ;
3874 else
3875#endif
3876 if ((ev_io *)wl != &pipe_w)
3877 if (types & EV_IO)
3878 cb (EV_A_ EV_IO, wl);
3879
3880 wl = wn;
3881 }
3882
3883 if (types & (EV_TIMER | EV_STAT))
3884 for (i = timercnt + HEAP0; i-- > HEAP0; )
3885#if EV_STAT_ENABLE
3886 /*TODO: timer is not always active*/
3887 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3888 {
3889 if (types & EV_STAT)
3890 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3891 }
3892 else
3893#endif
3894 if (types & EV_TIMER)
3895 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3896
3897#if EV_PERIODIC_ENABLE
3898 if (types & EV_PERIODIC)
3899 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3900 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3901#endif
3902
3903#if EV_IDLE_ENABLE
3904 if (types & EV_IDLE)
3905 for (j = NUMPRI; i--; )
3906 for (i = idlecnt [j]; i--; )
3907 cb (EV_A_ EV_IDLE, idles [j][i]);
3908#endif
3909
3910#if EV_FORK_ENABLE
3911 if (types & EV_FORK)
3912 for (i = forkcnt; i--; )
3913 if (ev_cb (forks [i]) != embed_fork_cb)
3914 cb (EV_A_ EV_FORK, forks [i]);
3915#endif
3916
3917#if EV_ASYNC_ENABLE
3918 if (types & EV_ASYNC)
3919 for (i = asynccnt; i--; )
3920 cb (EV_A_ EV_ASYNC, asyncs [i]);
3921#endif
3922
3923#if EV_PREPARE_ENABLE
3924 if (types & EV_PREPARE)
3925 for (i = preparecnt; i--; )
3926# if EV_EMBED_ENABLE
3927 if (ev_cb (prepares [i]) != embed_prepare_cb)
1891#endif 3928# endif
3929 cb (EV_A_ EV_PREPARE, prepares [i]);
3930#endif
1892 3931
3932#if EV_CHECK_ENABLE
3933 if (types & EV_CHECK)
3934 for (i = checkcnt; i--; )
3935 cb (EV_A_ EV_CHECK, checks [i]);
3936#endif
3937
3938#if EV_SIGNAL_ENABLE
3939 if (types & EV_SIGNAL)
3940 for (i = 0; i < EV_NSIG - 1; ++i)
3941 for (wl = signals [i].head; wl; )
3942 {
3943 wn = wl->next;
3944 cb (EV_A_ EV_SIGNAL, wl);
3945 wl = wn;
3946 }
3947#endif
3948
3949#if EV_CHILD_ENABLE
3950 if (types & EV_CHILD)
3951 for (i = (EV_PID_HASHSIZE); i--; )
3952 for (wl = childs [i]; wl; )
3953 {
3954 wn = wl->next;
3955 cb (EV_A_ EV_CHILD, wl);
3956 wl = wn;
3957 }
3958#endif
3959/* EV_STAT 0x00001000 /* stat data changed */
3960/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3961}
3962#endif
3963
3964#if EV_MULTIPLICITY
3965 #include "ev_wrap.h"
3966#endif
3967
3968EV_CPP(})
3969

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