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Comparing libev/ev.c (file contents):
Revision 1.157 by root, Wed Nov 28 20:58:32 2007 UTC vs.
Revision 1.398 by root, Sun Sep 25 21:27:35 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
30 */ 38 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 43# include EV_CONFIG_H
39# else 44# else
40# include "config.h" 45# include "config.h"
41# endif 46# endif
42 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
43# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
46# endif 71# endif
47# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
49# endif 74# endif
50# else 75# else
51# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
53# endif 78# endif
54# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
56# endif 81# endif
57# endif 82# endif
58 83
84# if HAVE_NANOSLEEP
59# ifndef EV_USE_SELECT 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif 87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
65# endif 91# endif
66 92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
67# ifndef EV_USE_POLL 94# ifndef EV_USE_SELECT
68# if HAVE_POLL && HAVE_POLL_H 95# define EV_USE_SELECT EV_FEATURE_BACKENDS
69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
73# endif 109# endif
74 110
75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
78# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
79# define EV_USE_EPOLL 0
80# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
81# endif 118# endif
82 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
83# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
89# endif 127# endif
90 128
91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
93# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
94# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
95# define EV_USE_PORT 0
96# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
97# endif 136# endif
98 137
99# ifndef EV_USE_INOTIFY
100# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
101# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
102# else
103# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
104# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
105# endif 145# endif
106 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
107#endif 154# endif
108 155
109#include <math.h> 156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
110#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
111#include <fcntl.h> 169#include <fcntl.h>
112#include <stddef.h> 170#include <stddef.h>
113 171
114#include <stdio.h> 172#include <stdio.h>
115 173
116#include <assert.h> 174#include <assert.h>
117#include <errno.h> 175#include <errno.h>
118#include <sys/types.h> 176#include <sys/types.h>
119#include <time.h> 177#include <time.h>
178#include <limits.h>
120 179
121#include <signal.h> 180#include <signal.h>
122 181
123#ifdef EV_H 182#ifdef EV_H
124# include EV_H 183# include EV_H
125#else 184#else
126# include "ev.h" 185# include "ev.h"
127#endif 186#endif
187
188EV_CPP(extern "C" {)
128 189
129#ifndef _WIN32 190#ifndef _WIN32
130# include <sys/time.h> 191# include <sys/time.h>
131# include <sys/wait.h> 192# include <sys/wait.h>
132# include <unistd.h> 193# include <unistd.h>
133#else 194#else
195# include <io.h>
134# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 197# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
138# endif 200# endif
201# undef EV_AVOID_STDIO
202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */
213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
139#endif 251# endif
140 252#endif
141/**/
142 253
143#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
144# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
259# endif
145#endif 260#endif
146 261
147#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
264#endif
265
266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
270# define EV_USE_NANOSLEEP 0
271# endif
149#endif 272#endif
150 273
151#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 276#endif
154 277
155#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
156# ifdef _WIN32 279# ifdef _WIN32
157# define EV_USE_POLL 0 280# define EV_USE_POLL 0
158# else 281# else
159# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 283# endif
161#endif 284#endif
162 285
163#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
289# else
164# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
291# endif
165#endif 292#endif
166 293
167#ifndef EV_USE_KQUEUE 294#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 295# define EV_USE_KQUEUE 0
169#endif 296#endif
… …
171#ifndef EV_USE_PORT 298#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 299# define EV_USE_PORT 0
173#endif 300#endif
174 301
175#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_INOTIFY EV_FEATURE_OS
305# else
176# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
307# endif
177#endif 308#endif
178 309
179#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 312#endif
313
314#ifndef EV_INOTIFY_HASHSIZE
315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
316#endif
317
318#ifndef EV_USE_EVENTFD
319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
320# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 321# else
183# define EV_PID_HASHSIZE 16 322# define EV_USE_EVENTFD 0
184# endif 323# endif
185#endif 324#endif
186 325
187#ifndef EV_INOTIFY_HASHSIZE 326#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 328# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 329# else
191# define EV_INOTIFY_HASHSIZE 16 330# define EV_USE_SIGNALFD 0
192# endif 331# endif
193#endif 332#endif
194 333
195/**/ 334#if 0 /* debugging */
335# define EV_VERIFY 3
336# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1
338#endif
339
340#ifndef EV_VERIFY
341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342#endif
343
344#ifndef EV_USE_4HEAP
345# define EV_USE_4HEAP EV_FEATURE_DATA
346#endif
347
348#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
364#endif
365
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
196 373
197#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
200#endif 377#endif
… …
202#ifndef CLOCK_REALTIME 379#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 380# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 381# define EV_USE_REALTIME 0
205#endif 382#endif
206 383
384#if !EV_STAT_ENABLE
385# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0
387#endif
388
389#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
392# include <sys/select.h>
393# endif
394#endif
395
396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
398# include <sys/inotify.h>
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0
403# endif
404#endif
405
207#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 407# include <winsock.h>
209#endif 408#endif
210 409
211#if !EV_STAT_ENABLE 410#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
412# include <stdint.h>
413# ifndef EFD_NONBLOCK
414# define EFD_NONBLOCK O_NONBLOCK
213#endif 415# endif
416# ifndef EFD_CLOEXEC
417# ifdef O_CLOEXEC
418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
214 425
215#if EV_USE_INOTIFY 426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
216# include <sys/inotify.h> 428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445};
217#endif 446#endif
218 447
219/**/ 448/**/
449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
456/*
457 * This is used to work around floating point rounding problems.
458 * This value is good at least till the year 4000.
459 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
220 462
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
224 465
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
468
469/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ECB.H BEGIN */
471/*
472 * libecb - http://software.schmorp.de/pkg/libecb
473 *
474 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
475 * Copyright (©) 2011 Emanuele Giaquinta
476 * All rights reserved.
477 *
478 * Redistribution and use in source and binary forms, with or without modifica-
479 * tion, are permitted provided that the following conditions are met:
480 *
481 * 1. Redistributions of source code must retain the above copyright notice,
482 * this list of conditions and the following disclaimer.
483 *
484 * 2. Redistributions in binary form must reproduce the above copyright
485 * notice, this list of conditions and the following disclaimer in the
486 * documentation and/or other materials provided with the distribution.
487 *
488 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
489 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
490 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
491 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
492 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
493 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
494 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
495 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
496 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
497 * OF THE POSSIBILITY OF SUCH DAMAGE.
498 */
499
500#ifndef ECB_H
501#define ECB_H
502
503#ifdef _WIN32
504 typedef signed char int8_t;
505 typedef unsigned char uint8_t;
506 typedef signed short int16_t;
507 typedef unsigned short uint16_t;
508 typedef signed int int32_t;
509 typedef unsigned int uint32_t;
225#if __GNUC__ >= 3 510 #if __GNUC__
226# define expect(expr,value) __builtin_expect ((expr),(value)) 511 typedef signed long long int64_t;
227# define inline_size static inline /* inline for codesize */ 512 typedef unsigned long long uint64_t;
228# if EV_MINIMAL 513 #else /* _MSC_VER || __BORLANDC__ */
229# define noinline __attribute__ ((noinline)) 514 typedef signed __int64 int64_t;
230# define inline_speed static noinline 515 typedef unsigned __int64 uint64_t;
231# else
232# define noinline
233# define inline_speed static inline
234# endif 516 #endif
235#else 517#else
518 #include <inttypes.h>
519#endif
520
521/* many compilers define _GNUC_ to some versions but then only implement
522 * what their idiot authors think are the "more important" extensions,
523 * causing enormous grief in return for some better fake benchmark numbers.
524 * or so.
525 * we try to detect these and simply assume they are not gcc - if they have
526 * an issue with that they should have done it right in the first place.
527 */
528#ifndef ECB_GCC_VERSION
529 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
530 #define ECB_GCC_VERSION(major,minor) 0
531 #else
532 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
533 #endif
534#endif
535
536/*****************************************************************************/
537
538/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
539/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
540
541#if ECB_NO_THREADS || ECB_NO_SMP
542 #define ECB_MEMORY_FENCE do { } while (0)
543#endif
544
545#ifndef ECB_MEMORY_FENCE
546 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || defined(__clang__)
547 #if __i386__
548 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
549 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
550 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
551 #elif __amd64
552 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
553 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
554 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
555 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
556 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
557 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
558 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
559 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
560 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
561 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
563 #endif
564 #endif
565#endif
566
567#ifndef ECB_MEMORY_FENCE
568 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
569 #define ECB_MEMORY_FENCE __sync_synchronize ()
570 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
571 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
572 #elif _MSC_VER >= 1400 /* VC++ 2005 */
573 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
574 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
575 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
576 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
577 #elif defined(_WIN32)
578 #include <WinNT.h>
579 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
580 #endif
581#endif
582
583#ifndef ECB_MEMORY_FENCE
584 #if !ECB_AVOID_PTHREADS
585 /*
586 * if you get undefined symbol references to pthread_mutex_lock,
587 * or failure to find pthread.h, then you should implement
588 * the ECB_MEMORY_FENCE operations for your cpu/compiler
589 * OR provide pthread.h and link against the posix thread library
590 * of your system.
591 */
592 #include <pthread.h>
593 #define ECB_NEEDS_PTHREADS 1
594 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
595
596 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
597 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
598 #endif
599#endif
600
601#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
602 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
603#endif
604
605#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
606 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
607#endif
608
609/*****************************************************************************/
610
611#define ECB_C99 (__STDC_VERSION__ >= 199901L)
612
613#if __cplusplus
614 #define ecb_inline static inline
615#elif ECB_GCC_VERSION(2,5)
616 #define ecb_inline static __inline__
617#elif ECB_C99
618 #define ecb_inline static inline
619#else
620 #define ecb_inline static
621#endif
622
623#if ECB_GCC_VERSION(3,3)
624 #define ecb_restrict __restrict__
625#elif ECB_C99
626 #define ecb_restrict restrict
627#else
628 #define ecb_restrict
629#endif
630
631typedef int ecb_bool;
632
633#define ECB_CONCAT_(a, b) a ## b
634#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
635#define ECB_STRINGIFY_(a) # a
636#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
637
638#define ecb_function_ ecb_inline
639
640#if ECB_GCC_VERSION(3,1)
641 #define ecb_attribute(attrlist) __attribute__(attrlist)
642 #define ecb_is_constant(expr) __builtin_constant_p (expr)
643 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
644 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
645#else
646 #define ecb_attribute(attrlist)
647 #define ecb_is_constant(expr) 0
236# define expect(expr,value) (expr) 648 #define ecb_expect(expr,value) (expr)
237# define inline_speed static 649 #define ecb_prefetch(addr,rw,locality)
238# define inline_size static
239# define noinline
240#endif 650#endif
241 651
652/* no emulation for ecb_decltype */
653#if ECB_GCC_VERSION(4,5)
654 #define ecb_decltype(x) __decltype(x)
655#elif ECB_GCC_VERSION(3,0)
656 #define ecb_decltype(x) __typeof(x)
657#endif
658
659#define ecb_noinline ecb_attribute ((__noinline__))
660#define ecb_noreturn ecb_attribute ((__noreturn__))
661#define ecb_unused ecb_attribute ((__unused__))
662#define ecb_const ecb_attribute ((__const__))
663#define ecb_pure ecb_attribute ((__pure__))
664
665#if ECB_GCC_VERSION(4,3)
666 #define ecb_artificial ecb_attribute ((__artificial__))
667 #define ecb_hot ecb_attribute ((__hot__))
668 #define ecb_cold ecb_attribute ((__cold__))
669#else
670 #define ecb_artificial
671 #define ecb_hot
672 #define ecb_cold
673#endif
674
675/* put around conditional expressions if you are very sure that the */
676/* expression is mostly true or mostly false. note that these return */
677/* booleans, not the expression. */
242#define expect_false(expr) expect ((expr) != 0, 0) 678#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
243#define expect_true(expr) expect ((expr) != 0, 1) 679#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
680/* for compatibility to the rest of the world */
681#define ecb_likely(expr) ecb_expect_true (expr)
682#define ecb_unlikely(expr) ecb_expect_false (expr)
244 683
684/* count trailing zero bits and count # of one bits */
685#if ECB_GCC_VERSION(3,4)
686 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
687 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
688 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
689 #define ecb_ctz32(x) __builtin_ctz (x)
690 #define ecb_ctz64(x) __builtin_ctzll (x)
691 #define ecb_popcount32(x) __builtin_popcount (x)
692 /* no popcountll */
693#else
694 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
695 ecb_function_ int
696 ecb_ctz32 (uint32_t x)
697 {
698 int r = 0;
699
700 x &= ~x + 1; /* this isolates the lowest bit */
701
702#if ECB_branchless_on_i386
703 r += !!(x & 0xaaaaaaaa) << 0;
704 r += !!(x & 0xcccccccc) << 1;
705 r += !!(x & 0xf0f0f0f0) << 2;
706 r += !!(x & 0xff00ff00) << 3;
707 r += !!(x & 0xffff0000) << 4;
708#else
709 if (x & 0xaaaaaaaa) r += 1;
710 if (x & 0xcccccccc) r += 2;
711 if (x & 0xf0f0f0f0) r += 4;
712 if (x & 0xff00ff00) r += 8;
713 if (x & 0xffff0000) r += 16;
714#endif
715
716 return r;
717 }
718
719 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
720 ecb_function_ int
721 ecb_ctz64 (uint64_t x)
722 {
723 int shift = x & 0xffffffffU ? 0 : 32;
724 return ecb_ctz32 (x >> shift) + shift;
725 }
726
727 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
728 ecb_function_ int
729 ecb_popcount32 (uint32_t x)
730 {
731 x -= (x >> 1) & 0x55555555;
732 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
733 x = ((x >> 4) + x) & 0x0f0f0f0f;
734 x *= 0x01010101;
735
736 return x >> 24;
737 }
738
739 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
740 ecb_function_ int ecb_ld32 (uint32_t x)
741 {
742 int r = 0;
743
744 if (x >> 16) { x >>= 16; r += 16; }
745 if (x >> 8) { x >>= 8; r += 8; }
746 if (x >> 4) { x >>= 4; r += 4; }
747 if (x >> 2) { x >>= 2; r += 2; }
748 if (x >> 1) { r += 1; }
749
750 return r;
751 }
752
753 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
754 ecb_function_ int ecb_ld64 (uint64_t x)
755 {
756 int r = 0;
757
758 if (x >> 32) { x >>= 32; r += 32; }
759
760 return r + ecb_ld32 (x);
761 }
762#endif
763
764/* popcount64 is only available on 64 bit cpus as gcc builtin */
765/* so for this version we are lazy */
766ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
767ecb_function_ int
768ecb_popcount64 (uint64_t x)
769{
770 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
771}
772
773ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
774ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
775ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
776ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
777ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
778ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
779ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
780ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
781
782ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
783ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
784ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
785ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
786ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
787ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
788ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
789ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
790
791#if ECB_GCC_VERSION(4,3)
792 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
793 #define ecb_bswap32(x) __builtin_bswap32 (x)
794 #define ecb_bswap64(x) __builtin_bswap64 (x)
795#else
796 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
797 ecb_function_ uint16_t
798 ecb_bswap16 (uint16_t x)
799 {
800 return ecb_rotl16 (x, 8);
801 }
802
803 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
804 ecb_function_ uint32_t
805 ecb_bswap32 (uint32_t x)
806 {
807 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
808 }
809
810 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
811 ecb_function_ uint64_t
812 ecb_bswap64 (uint64_t x)
813 {
814 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
815 }
816#endif
817
818#if ECB_GCC_VERSION(4,5)
819 #define ecb_unreachable() __builtin_unreachable ()
820#else
821 /* this seems to work fine, but gcc always emits a warning for it :/ */
822 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
823 ecb_function_ void ecb_unreachable (void) { }
824#endif
825
826/* try to tell the compiler that some condition is definitely true */
827#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
828
829ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
830ecb_function_ unsigned char
831ecb_byteorder_helper (void)
832{
833 const uint32_t u = 0x11223344;
834 return *(unsigned char *)&u;
835}
836
837ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
838ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
839ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
840ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
841
842#if ECB_GCC_VERSION(3,0) || ECB_C99
843 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
844#else
845 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
846#endif
847
848#if __cplusplus
849 template<typename T>
850 static inline T ecb_div_rd (T val, T div)
851 {
852 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
853 }
854 template<typename T>
855 static inline T ecb_div_ru (T val, T div)
856 {
857 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
858 }
859#else
860 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
861 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
862#endif
863
864#if ecb_cplusplus_does_not_suck
865 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
866 template<typename T, int N>
867 static inline int ecb_array_length (const T (&arr)[N])
868 {
869 return N;
870 }
871#else
872 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
873#endif
874
875#endif
876
877/* ECB.H END */
878
879#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
880/* if your architecture doesn't need memory fences, e.g. because it is
881 * single-cpu/core, or if you use libev in a project that doesn't use libev
882 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
883 * libev, in which casess the memory fences become nops.
884 * alternatively, you can remove this #error and link against libpthread,
885 * which will then provide the memory fences.
886 */
887# error "memory fences not defined for your architecture, please report"
888#endif
889
890#ifndef ECB_MEMORY_FENCE
891# define ECB_MEMORY_FENCE do { } while (0)
892# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
893# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
894#endif
895
896#define expect_false(cond) ecb_expect_false (cond)
897#define expect_true(cond) ecb_expect_true (cond)
898#define noinline ecb_noinline
899
900#define inline_size ecb_inline
901
902#if EV_FEATURE_CODE
903# define inline_speed ecb_inline
904#else
905# define inline_speed static noinline
906#endif
907
245#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 908#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
909
910#if EV_MINPRI == EV_MAXPRI
911# define ABSPRI(w) (((W)w), 0)
912#else
246#define ABSPRI(w) ((w)->priority - EV_MINPRI) 913# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
914#endif
247 915
248#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 916#define EMPTY /* required for microsofts broken pseudo-c compiler */
249#define EMPTY2(a,b) /* used to suppress some warnings */ 917#define EMPTY2(a,b) /* used to suppress some warnings */
250 918
251typedef ev_watcher *W; 919typedef ev_watcher *W;
252typedef ev_watcher_list *WL; 920typedef ev_watcher_list *WL;
253typedef ev_watcher_time *WT; 921typedef ev_watcher_time *WT;
254 922
923#define ev_active(w) ((W)(w))->active
924#define ev_at(w) ((WT)(w))->at
925
926#if EV_USE_REALTIME
927/* sig_atomic_t is used to avoid per-thread variables or locking but still */
928/* giving it a reasonably high chance of working on typical architectures */
929static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
930#endif
931
932#if EV_USE_MONOTONIC
255static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 933static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
934#endif
935
936#ifndef EV_FD_TO_WIN32_HANDLE
937# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
938#endif
939#ifndef EV_WIN32_HANDLE_TO_FD
940# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
941#endif
942#ifndef EV_WIN32_CLOSE_FD
943# define EV_WIN32_CLOSE_FD(fd) close (fd)
944#endif
256 945
257#ifdef _WIN32 946#ifdef _WIN32
258# include "ev_win32.c" 947# include "ev_win32.c"
259#endif 948#endif
260 949
261/*****************************************************************************/ 950/*****************************************************************************/
262 951
952/* define a suitable floor function (only used by periodics atm) */
953
954#if EV_USE_FLOOR
955# include <math.h>
956# define ev_floor(v) floor (v)
957#else
958
959#include <float.h>
960
961/* a floor() replacement function, should be independent of ev_tstamp type */
962static ev_tstamp noinline
963ev_floor (ev_tstamp v)
964{
965 /* the choice of shift factor is not terribly important */
966#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
967 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
968#else
969 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
970#endif
971
972 /* argument too large for an unsigned long? */
973 if (expect_false (v >= shift))
974 {
975 ev_tstamp f;
976
977 if (v == v - 1.)
978 return v; /* very large number */
979
980 f = shift * ev_floor (v * (1. / shift));
981 return f + ev_floor (v - f);
982 }
983
984 /* special treatment for negative args? */
985 if (expect_false (v < 0.))
986 {
987 ev_tstamp f = -ev_floor (-v);
988
989 return f - (f == v ? 0 : 1);
990 }
991
992 /* fits into an unsigned long */
993 return (unsigned long)v;
994}
995
996#endif
997
998/*****************************************************************************/
999
1000#ifdef __linux
1001# include <sys/utsname.h>
1002#endif
1003
1004static unsigned int noinline ecb_cold
1005ev_linux_version (void)
1006{
1007#ifdef __linux
1008 unsigned int v = 0;
1009 struct utsname buf;
1010 int i;
1011 char *p = buf.release;
1012
1013 if (uname (&buf))
1014 return 0;
1015
1016 for (i = 3+1; --i; )
1017 {
1018 unsigned int c = 0;
1019
1020 for (;;)
1021 {
1022 if (*p >= '0' && *p <= '9')
1023 c = c * 10 + *p++ - '0';
1024 else
1025 {
1026 p += *p == '.';
1027 break;
1028 }
1029 }
1030
1031 v = (v << 8) | c;
1032 }
1033
1034 return v;
1035#else
1036 return 0;
1037#endif
1038}
1039
1040/*****************************************************************************/
1041
1042#if EV_AVOID_STDIO
1043static void noinline ecb_cold
1044ev_printerr (const char *msg)
1045{
1046 write (STDERR_FILENO, msg, strlen (msg));
1047}
1048#endif
1049
263static void (*syserr_cb)(const char *msg); 1050static void (*syserr_cb)(const char *msg);
264 1051
265void 1052void ecb_cold
266ev_set_syserr_cb (void (*cb)(const char *msg)) 1053ev_set_syserr_cb (void (*cb)(const char *msg))
267{ 1054{
268 syserr_cb = cb; 1055 syserr_cb = cb;
269} 1056}
270 1057
271static void noinline 1058static void noinline ecb_cold
272syserr (const char *msg) 1059ev_syserr (const char *msg)
273{ 1060{
274 if (!msg) 1061 if (!msg)
275 msg = "(libev) system error"; 1062 msg = "(libev) system error";
276 1063
277 if (syserr_cb) 1064 if (syserr_cb)
278 syserr_cb (msg); 1065 syserr_cb (msg);
279 else 1066 else
280 { 1067 {
1068#if EV_AVOID_STDIO
1069 ev_printerr (msg);
1070 ev_printerr (": ");
1071 ev_printerr (strerror (errno));
1072 ev_printerr ("\n");
1073#else
281 perror (msg); 1074 perror (msg);
1075#endif
282 abort (); 1076 abort ();
283 } 1077 }
284} 1078}
285 1079
1080static void *
1081ev_realloc_emul (void *ptr, long size)
1082{
1083#if __GLIBC__
1084 return realloc (ptr, size);
1085#else
1086 /* some systems, notably openbsd and darwin, fail to properly
1087 * implement realloc (x, 0) (as required by both ansi c-89 and
1088 * the single unix specification, so work around them here.
1089 */
1090
1091 if (size)
1092 return realloc (ptr, size);
1093
1094 free (ptr);
1095 return 0;
1096#endif
1097}
1098
286static void *(*alloc)(void *ptr, long size); 1099static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
287 1100
288void 1101void ecb_cold
289ev_set_allocator (void *(*cb)(void *ptr, long size)) 1102ev_set_allocator (void *(*cb)(void *ptr, long size))
290{ 1103{
291 alloc = cb; 1104 alloc = cb;
292} 1105}
293 1106
294inline_speed void * 1107inline_speed void *
295ev_realloc (void *ptr, long size) 1108ev_realloc (void *ptr, long size)
296{ 1109{
297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1110 ptr = alloc (ptr, size);
298 1111
299 if (!ptr && size) 1112 if (!ptr && size)
300 { 1113 {
1114#if EV_AVOID_STDIO
1115 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1116#else
301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1117 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1118#endif
302 abort (); 1119 abort ();
303 } 1120 }
304 1121
305 return ptr; 1122 return ptr;
306} 1123}
… …
308#define ev_malloc(size) ev_realloc (0, (size)) 1125#define ev_malloc(size) ev_realloc (0, (size))
309#define ev_free(ptr) ev_realloc ((ptr), 0) 1126#define ev_free(ptr) ev_realloc ((ptr), 0)
310 1127
311/*****************************************************************************/ 1128/*****************************************************************************/
312 1129
1130/* set in reify when reification needed */
1131#define EV_ANFD_REIFY 1
1132
1133/* file descriptor info structure */
313typedef struct 1134typedef struct
314{ 1135{
315 WL head; 1136 WL head;
316 unsigned char events; 1137 unsigned char events; /* the events watched for */
1138 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1139 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
317 unsigned char reify; 1140 unsigned char unused;
1141#if EV_USE_EPOLL
1142 unsigned int egen; /* generation counter to counter epoll bugs */
1143#endif
318#if EV_SELECT_IS_WINSOCKET 1144#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
319 SOCKET handle; 1145 SOCKET handle;
320#endif 1146#endif
1147#if EV_USE_IOCP
1148 OVERLAPPED or, ow;
1149#endif
321} ANFD; 1150} ANFD;
322 1151
1152/* stores the pending event set for a given watcher */
323typedef struct 1153typedef struct
324{ 1154{
325 W w; 1155 W w;
326 int events; 1156 int events; /* the pending event set for the given watcher */
327} ANPENDING; 1157} ANPENDING;
328 1158
329#if EV_USE_INOTIFY 1159#if EV_USE_INOTIFY
1160/* hash table entry per inotify-id */
330typedef struct 1161typedef struct
331{ 1162{
332 WL head; 1163 WL head;
333} ANFS; 1164} ANFS;
1165#endif
1166
1167/* Heap Entry */
1168#if EV_HEAP_CACHE_AT
1169 /* a heap element */
1170 typedef struct {
1171 ev_tstamp at;
1172 WT w;
1173 } ANHE;
1174
1175 #define ANHE_w(he) (he).w /* access watcher, read-write */
1176 #define ANHE_at(he) (he).at /* access cached at, read-only */
1177 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1178#else
1179 /* a heap element */
1180 typedef WT ANHE;
1181
1182 #define ANHE_w(he) (he)
1183 #define ANHE_at(he) (he)->at
1184 #define ANHE_at_cache(he)
334#endif 1185#endif
335 1186
336#if EV_MULTIPLICITY 1187#if EV_MULTIPLICITY
337 1188
338 struct ev_loop 1189 struct ev_loop
… …
357 1208
358 static int ev_default_loop_ptr; 1209 static int ev_default_loop_ptr;
359 1210
360#endif 1211#endif
361 1212
1213#if EV_FEATURE_API
1214# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1215# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1216# define EV_INVOKE_PENDING invoke_cb (EV_A)
1217#else
1218# define EV_RELEASE_CB (void)0
1219# define EV_ACQUIRE_CB (void)0
1220# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1221#endif
1222
1223#define EVBREAK_RECURSE 0x80
1224
362/*****************************************************************************/ 1225/*****************************************************************************/
363 1226
1227#ifndef EV_HAVE_EV_TIME
364ev_tstamp 1228ev_tstamp
365ev_time (void) 1229ev_time (void)
366{ 1230{
367#if EV_USE_REALTIME 1231#if EV_USE_REALTIME
1232 if (expect_true (have_realtime))
1233 {
368 struct timespec ts; 1234 struct timespec ts;
369 clock_gettime (CLOCK_REALTIME, &ts); 1235 clock_gettime (CLOCK_REALTIME, &ts);
370 return ts.tv_sec + ts.tv_nsec * 1e-9; 1236 return ts.tv_sec + ts.tv_nsec * 1e-9;
371#else 1237 }
1238#endif
1239
372 struct timeval tv; 1240 struct timeval tv;
373 gettimeofday (&tv, 0); 1241 gettimeofday (&tv, 0);
374 return tv.tv_sec + tv.tv_usec * 1e-6; 1242 return tv.tv_sec + tv.tv_usec * 1e-6;
375#endif
376} 1243}
1244#endif
377 1245
378ev_tstamp inline_size 1246inline_size ev_tstamp
379get_clock (void) 1247get_clock (void)
380{ 1248{
381#if EV_USE_MONOTONIC 1249#if EV_USE_MONOTONIC
382 if (expect_true (have_monotonic)) 1250 if (expect_true (have_monotonic))
383 { 1251 {
… …
396{ 1264{
397 return ev_rt_now; 1265 return ev_rt_now;
398} 1266}
399#endif 1267#endif
400 1268
401#define array_roundsize(type,n) (((n) | 4) & ~3) 1269void
1270ev_sleep (ev_tstamp delay)
1271{
1272 if (delay > 0.)
1273 {
1274#if EV_USE_NANOSLEEP
1275 struct timespec ts;
1276
1277 EV_TS_SET (ts, delay);
1278 nanosleep (&ts, 0);
1279#elif defined(_WIN32)
1280 Sleep ((unsigned long)(delay * 1e3));
1281#else
1282 struct timeval tv;
1283
1284 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1285 /* something not guaranteed by newer posix versions, but guaranteed */
1286 /* by older ones */
1287 EV_TV_SET (tv, delay);
1288 select (0, 0, 0, 0, &tv);
1289#endif
1290 }
1291}
1292
1293/*****************************************************************************/
1294
1295#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1296
1297/* find a suitable new size for the given array, */
1298/* hopefully by rounding to a nice-to-malloc size */
1299inline_size int
1300array_nextsize (int elem, int cur, int cnt)
1301{
1302 int ncur = cur + 1;
1303
1304 do
1305 ncur <<= 1;
1306 while (cnt > ncur);
1307
1308 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
1309 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1310 {
1311 ncur *= elem;
1312 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1313 ncur = ncur - sizeof (void *) * 4;
1314 ncur /= elem;
1315 }
1316
1317 return ncur;
1318}
1319
1320static void * noinline ecb_cold
1321array_realloc (int elem, void *base, int *cur, int cnt)
1322{
1323 *cur = array_nextsize (elem, *cur, cnt);
1324 return ev_realloc (base, elem * *cur);
1325}
1326
1327#define array_init_zero(base,count) \
1328 memset ((void *)(base), 0, sizeof (*(base)) * (count))
402 1329
403#define array_needsize(type,base,cur,cnt,init) \ 1330#define array_needsize(type,base,cur,cnt,init) \
404 if (expect_false ((cnt) > cur)) \ 1331 if (expect_false ((cnt) > (cur))) \
405 { \ 1332 { \
406 int newcnt = cur; \ 1333 int ecb_unused ocur_ = (cur); \
407 do \ 1334 (base) = (type *)array_realloc \
408 { \ 1335 (sizeof (type), (base), &(cur), (cnt)); \
409 newcnt = array_roundsize (type, newcnt << 1); \ 1336 init ((base) + (ocur_), (cur) - ocur_); \
410 } \
411 while ((cnt) > newcnt); \
412 \
413 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
414 init (base + cur, newcnt - cur); \
415 cur = newcnt; \
416 } 1337 }
417 1338
1339#if 0
418#define array_slim(type,stem) \ 1340#define array_slim(type,stem) \
419 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1341 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
420 { \ 1342 { \
421 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1343 stem ## max = array_roundsize (stem ## cnt >> 1); \
422 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1344 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
423 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1345 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
424 } 1346 }
1347#endif
425 1348
426#define array_free(stem, idx) \ 1349#define array_free(stem, idx) \
427 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1350 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
428 1351
429/*****************************************************************************/ 1352/*****************************************************************************/
1353
1354/* dummy callback for pending events */
1355static void noinline
1356pendingcb (EV_P_ ev_prepare *w, int revents)
1357{
1358}
430 1359
431void noinline 1360void noinline
432ev_feed_event (EV_P_ void *w, int revents) 1361ev_feed_event (EV_P_ void *w, int revents)
433{ 1362{
434 W w_ = (W)w; 1363 W w_ = (W)w;
1364 int pri = ABSPRI (w_);
435 1365
436 if (expect_false (w_->pending)) 1366 if (expect_false (w_->pending))
1367 pendings [pri][w_->pending - 1].events |= revents;
1368 else
437 { 1369 {
1370 w_->pending = ++pendingcnt [pri];
1371 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1372 pendings [pri][w_->pending - 1].w = w_;
438 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1373 pendings [pri][w_->pending - 1].events = revents;
439 return;
440 } 1374 }
441
442 w_->pending = ++pendingcnt [ABSPRI (w_)];
443 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
444 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
445 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
446} 1375}
447 1376
448void inline_size 1377inline_speed void
1378feed_reverse (EV_P_ W w)
1379{
1380 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1381 rfeeds [rfeedcnt++] = w;
1382}
1383
1384inline_size void
1385feed_reverse_done (EV_P_ int revents)
1386{
1387 do
1388 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1389 while (rfeedcnt);
1390}
1391
1392inline_speed void
449queue_events (EV_P_ W *events, int eventcnt, int type) 1393queue_events (EV_P_ W *events, int eventcnt, int type)
450{ 1394{
451 int i; 1395 int i;
452 1396
453 for (i = 0; i < eventcnt; ++i) 1397 for (i = 0; i < eventcnt; ++i)
454 ev_feed_event (EV_A_ events [i], type); 1398 ev_feed_event (EV_A_ events [i], type);
455} 1399}
456 1400
457/*****************************************************************************/ 1401/*****************************************************************************/
458 1402
459void inline_size 1403inline_speed void
460anfds_init (ANFD *base, int count)
461{
462 while (count--)
463 {
464 base->head = 0;
465 base->events = EV_NONE;
466 base->reify = 0;
467
468 ++base;
469 }
470}
471
472void inline_speed
473fd_event (EV_P_ int fd, int revents) 1404fd_event_nocheck (EV_P_ int fd, int revents)
474{ 1405{
475 ANFD *anfd = anfds + fd; 1406 ANFD *anfd = anfds + fd;
476 ev_io *w; 1407 ev_io *w;
477 1408
478 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1409 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
482 if (ev) 1413 if (ev)
483 ev_feed_event (EV_A_ (W)w, ev); 1414 ev_feed_event (EV_A_ (W)w, ev);
484 } 1415 }
485} 1416}
486 1417
1418/* do not submit kernel events for fds that have reify set */
1419/* because that means they changed while we were polling for new events */
1420inline_speed void
1421fd_event (EV_P_ int fd, int revents)
1422{
1423 ANFD *anfd = anfds + fd;
1424
1425 if (expect_true (!anfd->reify))
1426 fd_event_nocheck (EV_A_ fd, revents);
1427}
1428
487void 1429void
488ev_feed_fd_event (EV_P_ int fd, int revents) 1430ev_feed_fd_event (EV_P_ int fd, int revents)
489{ 1431{
1432 if (fd >= 0 && fd < anfdmax)
490 fd_event (EV_A_ fd, revents); 1433 fd_event_nocheck (EV_A_ fd, revents);
491} 1434}
492 1435
493void inline_size 1436/* make sure the external fd watch events are in-sync */
1437/* with the kernel/libev internal state */
1438inline_size void
494fd_reify (EV_P) 1439fd_reify (EV_P)
495{ 1440{
496 int i; 1441 int i;
1442
1443#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1444 for (i = 0; i < fdchangecnt; ++i)
1445 {
1446 int fd = fdchanges [i];
1447 ANFD *anfd = anfds + fd;
1448
1449 if (anfd->reify & EV__IOFDSET && anfd->head)
1450 {
1451 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1452
1453 if (handle != anfd->handle)
1454 {
1455 unsigned long arg;
1456
1457 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1458
1459 /* handle changed, but fd didn't - we need to do it in two steps */
1460 backend_modify (EV_A_ fd, anfd->events, 0);
1461 anfd->events = 0;
1462 anfd->handle = handle;
1463 }
1464 }
1465 }
1466#endif
497 1467
498 for (i = 0; i < fdchangecnt; ++i) 1468 for (i = 0; i < fdchangecnt; ++i)
499 { 1469 {
500 int fd = fdchanges [i]; 1470 int fd = fdchanges [i];
501 ANFD *anfd = anfds + fd; 1471 ANFD *anfd = anfds + fd;
502 ev_io *w; 1472 ev_io *w;
503 1473
504 int events = 0; 1474 unsigned char o_events = anfd->events;
1475 unsigned char o_reify = anfd->reify;
505 1476
506 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1477 anfd->reify = 0;
507 events |= w->events;
508 1478
509#if EV_SELECT_IS_WINSOCKET 1479 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
510 if (events)
511 { 1480 {
512 unsigned long argp; 1481 anfd->events = 0;
513 anfd->handle = _get_osfhandle (fd); 1482
514 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1483 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1484 anfd->events |= (unsigned char)w->events;
1485
1486 if (o_events != anfd->events)
1487 o_reify = EV__IOFDSET; /* actually |= */
515 } 1488 }
516#endif
517 1489
518 anfd->reify = 0; 1490 if (o_reify & EV__IOFDSET)
519
520 backend_modify (EV_A_ fd, anfd->events, events); 1491 backend_modify (EV_A_ fd, o_events, anfd->events);
521 anfd->events = events;
522 } 1492 }
523 1493
524 fdchangecnt = 0; 1494 fdchangecnt = 0;
525} 1495}
526 1496
527void inline_size 1497/* something about the given fd changed */
1498inline_size void
528fd_change (EV_P_ int fd) 1499fd_change (EV_P_ int fd, int flags)
529{ 1500{
530 if (expect_false (anfds [fd].reify)) 1501 unsigned char reify = anfds [fd].reify;
531 return;
532
533 anfds [fd].reify = 1; 1502 anfds [fd].reify |= flags;
534 1503
1504 if (expect_true (!reify))
1505 {
535 ++fdchangecnt; 1506 ++fdchangecnt;
536 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1507 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
537 fdchanges [fdchangecnt - 1] = fd; 1508 fdchanges [fdchangecnt - 1] = fd;
1509 }
538} 1510}
539 1511
540void inline_speed 1512/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1513inline_speed void ecb_cold
541fd_kill (EV_P_ int fd) 1514fd_kill (EV_P_ int fd)
542{ 1515{
543 ev_io *w; 1516 ev_io *w;
544 1517
545 while ((w = (ev_io *)anfds [fd].head)) 1518 while ((w = (ev_io *)anfds [fd].head))
… …
547 ev_io_stop (EV_A_ w); 1520 ev_io_stop (EV_A_ w);
548 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1521 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
549 } 1522 }
550} 1523}
551 1524
552int inline_size 1525/* check whether the given fd is actually valid, for error recovery */
1526inline_size int ecb_cold
553fd_valid (int fd) 1527fd_valid (int fd)
554{ 1528{
555#ifdef _WIN32 1529#ifdef _WIN32
556 return _get_osfhandle (fd) != -1; 1530 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
557#else 1531#else
558 return fcntl (fd, F_GETFD) != -1; 1532 return fcntl (fd, F_GETFD) != -1;
559#endif 1533#endif
560} 1534}
561 1535
562/* called on EBADF to verify fds */ 1536/* called on EBADF to verify fds */
563static void noinline 1537static void noinline ecb_cold
564fd_ebadf (EV_P) 1538fd_ebadf (EV_P)
565{ 1539{
566 int fd; 1540 int fd;
567 1541
568 for (fd = 0; fd < anfdmax; ++fd) 1542 for (fd = 0; fd < anfdmax; ++fd)
569 if (anfds [fd].events) 1543 if (anfds [fd].events)
570 if (!fd_valid (fd) == -1 && errno == EBADF) 1544 if (!fd_valid (fd) && errno == EBADF)
571 fd_kill (EV_A_ fd); 1545 fd_kill (EV_A_ fd);
572} 1546}
573 1547
574/* called on ENOMEM in select/poll to kill some fds and retry */ 1548/* called on ENOMEM in select/poll to kill some fds and retry */
575static void noinline 1549static void noinline ecb_cold
576fd_enomem (EV_P) 1550fd_enomem (EV_P)
577{ 1551{
578 int fd; 1552 int fd;
579 1553
580 for (fd = anfdmax; fd--; ) 1554 for (fd = anfdmax; fd--; )
581 if (anfds [fd].events) 1555 if (anfds [fd].events)
582 { 1556 {
583 fd_kill (EV_A_ fd); 1557 fd_kill (EV_A_ fd);
584 return; 1558 break;
585 } 1559 }
586} 1560}
587 1561
588/* usually called after fork if backend needs to re-arm all fds from scratch */ 1562/* usually called after fork if backend needs to re-arm all fds from scratch */
589static void noinline 1563static void noinline
… …
593 1567
594 for (fd = 0; fd < anfdmax; ++fd) 1568 for (fd = 0; fd < anfdmax; ++fd)
595 if (anfds [fd].events) 1569 if (anfds [fd].events)
596 { 1570 {
597 anfds [fd].events = 0; 1571 anfds [fd].events = 0;
598 fd_change (EV_A_ fd); 1572 anfds [fd].emask = 0;
1573 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
599 } 1574 }
600} 1575}
601 1576
602/*****************************************************************************/ 1577/* used to prepare libev internal fd's */
603 1578/* this is not fork-safe */
604void inline_speed 1579inline_speed void
605upheap (WT *heap, int k)
606{
607 WT w = heap [k];
608
609 while (k && heap [k >> 1]->at > w->at)
610 {
611 heap [k] = heap [k >> 1];
612 ((W)heap [k])->active = k + 1;
613 k >>= 1;
614 }
615
616 heap [k] = w;
617 ((W)heap [k])->active = k + 1;
618
619}
620
621void inline_speed
622downheap (WT *heap, int N, int k)
623{
624 WT w = heap [k];
625
626 while (k < (N >> 1))
627 {
628 int j = k << 1;
629
630 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
631 ++j;
632
633 if (w->at <= heap [j]->at)
634 break;
635
636 heap [k] = heap [j];
637 ((W)heap [k])->active = k + 1;
638 k = j;
639 }
640
641 heap [k] = w;
642 ((W)heap [k])->active = k + 1;
643}
644
645void inline_size
646adjustheap (WT *heap, int N, int k)
647{
648 upheap (heap, k);
649 downheap (heap, N, k);
650}
651
652/*****************************************************************************/
653
654typedef struct
655{
656 WL head;
657 sig_atomic_t volatile gotsig;
658} ANSIG;
659
660static ANSIG *signals;
661static int signalmax;
662
663static int sigpipe [2];
664static sig_atomic_t volatile gotsig;
665static ev_io sigev;
666
667void inline_size
668signals_init (ANSIG *base, int count)
669{
670 while (count--)
671 {
672 base->head = 0;
673 base->gotsig = 0;
674
675 ++base;
676 }
677}
678
679static void
680sighandler (int signum)
681{
682#if _WIN32
683 signal (signum, sighandler);
684#endif
685
686 signals [signum - 1].gotsig = 1;
687
688 if (!gotsig)
689 {
690 int old_errno = errno;
691 gotsig = 1;
692 write (sigpipe [1], &signum, 1);
693 errno = old_errno;
694 }
695}
696
697void noinline
698ev_feed_signal_event (EV_P_ int signum)
699{
700 WL w;
701
702#if EV_MULTIPLICITY
703 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
704#endif
705
706 --signum;
707
708 if (signum < 0 || signum >= signalmax)
709 return;
710
711 signals [signum].gotsig = 0;
712
713 for (w = signals [signum].head; w; w = w->next)
714 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
715}
716
717static void
718sigcb (EV_P_ ev_io *iow, int revents)
719{
720 int signum;
721
722 read (sigpipe [0], &revents, 1);
723 gotsig = 0;
724
725 for (signum = signalmax; signum--; )
726 if (signals [signum].gotsig)
727 ev_feed_signal_event (EV_A_ signum + 1);
728}
729
730void inline_size
731fd_intern (int fd) 1580fd_intern (int fd)
732{ 1581{
733#ifdef _WIN32 1582#ifdef _WIN32
734 int arg = 1; 1583 unsigned long arg = 1;
735 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1584 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
736#else 1585#else
737 fcntl (fd, F_SETFD, FD_CLOEXEC); 1586 fcntl (fd, F_SETFD, FD_CLOEXEC);
738 fcntl (fd, F_SETFL, O_NONBLOCK); 1587 fcntl (fd, F_SETFL, O_NONBLOCK);
739#endif 1588#endif
740} 1589}
741 1590
742static void noinline
743siginit (EV_P)
744{
745 fd_intern (sigpipe [0]);
746 fd_intern (sigpipe [1]);
747
748 ev_io_set (&sigev, sigpipe [0], EV_READ);
749 ev_io_start (EV_A_ &sigev);
750 ev_unref (EV_A); /* child watcher should not keep loop alive */
751}
752
753/*****************************************************************************/ 1591/*****************************************************************************/
754 1592
755static ev_child *childs [EV_PID_HASHSIZE]; 1593/*
1594 * the heap functions want a real array index. array index 0 is guaranteed to not
1595 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1596 * the branching factor of the d-tree.
1597 */
756 1598
1599/*
1600 * at the moment we allow libev the luxury of two heaps,
1601 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1602 * which is more cache-efficient.
1603 * the difference is about 5% with 50000+ watchers.
1604 */
1605#if EV_USE_4HEAP
1606
1607#define DHEAP 4
1608#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1609#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1610#define UPHEAP_DONE(p,k) ((p) == (k))
1611
1612/* away from the root */
1613inline_speed void
1614downheap (ANHE *heap, int N, int k)
1615{
1616 ANHE he = heap [k];
1617 ANHE *E = heap + N + HEAP0;
1618
1619 for (;;)
1620 {
1621 ev_tstamp minat;
1622 ANHE *minpos;
1623 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1624
1625 /* find minimum child */
1626 if (expect_true (pos + DHEAP - 1 < E))
1627 {
1628 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1629 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1630 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1631 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1632 }
1633 else if (pos < E)
1634 {
1635 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1636 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1637 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1638 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1639 }
1640 else
1641 break;
1642
1643 if (ANHE_at (he) <= minat)
1644 break;
1645
1646 heap [k] = *minpos;
1647 ev_active (ANHE_w (*minpos)) = k;
1648
1649 k = minpos - heap;
1650 }
1651
1652 heap [k] = he;
1653 ev_active (ANHE_w (he)) = k;
1654}
1655
1656#else /* 4HEAP */
1657
1658#define HEAP0 1
1659#define HPARENT(k) ((k) >> 1)
1660#define UPHEAP_DONE(p,k) (!(p))
1661
1662/* away from the root */
1663inline_speed void
1664downheap (ANHE *heap, int N, int k)
1665{
1666 ANHE he = heap [k];
1667
1668 for (;;)
1669 {
1670 int c = k << 1;
1671
1672 if (c >= N + HEAP0)
1673 break;
1674
1675 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1676 ? 1 : 0;
1677
1678 if (ANHE_at (he) <= ANHE_at (heap [c]))
1679 break;
1680
1681 heap [k] = heap [c];
1682 ev_active (ANHE_w (heap [k])) = k;
1683
1684 k = c;
1685 }
1686
1687 heap [k] = he;
1688 ev_active (ANHE_w (he)) = k;
1689}
1690#endif
1691
1692/* towards the root */
1693inline_speed void
1694upheap (ANHE *heap, int k)
1695{
1696 ANHE he = heap [k];
1697
1698 for (;;)
1699 {
1700 int p = HPARENT (k);
1701
1702 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1703 break;
1704
1705 heap [k] = heap [p];
1706 ev_active (ANHE_w (heap [k])) = k;
1707 k = p;
1708 }
1709
1710 heap [k] = he;
1711 ev_active (ANHE_w (he)) = k;
1712}
1713
1714/* move an element suitably so it is in a correct place */
1715inline_size void
1716adjustheap (ANHE *heap, int N, int k)
1717{
1718 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1719 upheap (heap, k);
1720 else
1721 downheap (heap, N, k);
1722}
1723
1724/* rebuild the heap: this function is used only once and executed rarely */
1725inline_size void
1726reheap (ANHE *heap, int N)
1727{
1728 int i;
1729
1730 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1731 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1732 for (i = 0; i < N; ++i)
1733 upheap (heap, i + HEAP0);
1734}
1735
1736/*****************************************************************************/
1737
1738/* associate signal watchers to a signal signal */
1739typedef struct
1740{
1741 EV_ATOMIC_T pending;
1742#if EV_MULTIPLICITY
1743 EV_P;
1744#endif
1745 WL head;
1746} ANSIG;
1747
1748static ANSIG signals [EV_NSIG - 1];
1749
1750/*****************************************************************************/
1751
1752#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1753
1754static void noinline ecb_cold
1755evpipe_init (EV_P)
1756{
1757 if (!ev_is_active (&pipe_w))
1758 {
1759# if EV_USE_EVENTFD
1760 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1761 if (evfd < 0 && errno == EINVAL)
1762 evfd = eventfd (0, 0);
1763
1764 if (evfd >= 0)
1765 {
1766 evpipe [0] = -1;
1767 fd_intern (evfd); /* doing it twice doesn't hurt */
1768 ev_io_set (&pipe_w, evfd, EV_READ);
1769 }
1770 else
1771# endif
1772 {
1773 while (pipe (evpipe))
1774 ev_syserr ("(libev) error creating signal/async pipe");
1775
1776 fd_intern (evpipe [0]);
1777 fd_intern (evpipe [1]);
1778 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1779 }
1780
1781 ev_io_start (EV_A_ &pipe_w);
1782 ev_unref (EV_A); /* watcher should not keep loop alive */
1783 }
1784}
1785
1786inline_speed void
1787evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1788{
1789 if (expect_true (*flag))
1790 return;
1791
1792 *flag = 1;
1793
1794 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1795
1796 pipe_write_skipped = 1;
1797
1798 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1799
1800 if (pipe_write_wanted)
1801 {
1802 int old_errno;
1803
1804 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1805
1806 old_errno = errno; /* save errno because write will clobber it */
1807
1808#if EV_USE_EVENTFD
1809 if (evfd >= 0)
1810 {
1811 uint64_t counter = 1;
1812 write (evfd, &counter, sizeof (uint64_t));
1813 }
1814 else
1815#endif
1816 {
1817 /* win32 people keep sending patches that change this write() to send() */
1818 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1819 /* so when you think this write should be a send instead, please find out */
1820 /* where your send() is from - it's definitely not the microsoft send, and */
1821 /* tell me. thank you. */
1822 write (evpipe [1], &(evpipe [1]), 1);
1823 }
1824
1825 errno = old_errno;
1826 }
1827}
1828
1829/* called whenever the libev signal pipe */
1830/* got some events (signal, async) */
1831static void
1832pipecb (EV_P_ ev_io *iow, int revents)
1833{
1834 int i;
1835
1836 if (revents & EV_READ)
1837 {
1838#if EV_USE_EVENTFD
1839 if (evfd >= 0)
1840 {
1841 uint64_t counter;
1842 read (evfd, &counter, sizeof (uint64_t));
1843 }
1844 else
1845#endif
1846 {
1847 char dummy;
1848 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1849 read (evpipe [0], &dummy, 1);
1850 }
1851 }
1852
1853 pipe_write_skipped = 0;
1854
1855#if EV_SIGNAL_ENABLE
1856 if (sig_pending)
1857 {
1858 sig_pending = 0;
1859
1860 for (i = EV_NSIG - 1; i--; )
1861 if (expect_false (signals [i].pending))
1862 ev_feed_signal_event (EV_A_ i + 1);
1863 }
1864#endif
1865
1866#if EV_ASYNC_ENABLE
1867 if (async_pending)
1868 {
1869 async_pending = 0;
1870
1871 for (i = asynccnt; i--; )
1872 if (asyncs [i]->sent)
1873 {
1874 asyncs [i]->sent = 0;
1875 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1876 }
1877 }
1878#endif
1879}
1880
1881/*****************************************************************************/
1882
1883void
1884ev_feed_signal (int signum)
1885{
1886#if EV_MULTIPLICITY
1887 EV_P = signals [signum - 1].loop;
1888
1889 if (!EV_A)
1890 return;
1891#endif
1892
1893 if (!ev_active (&pipe_w))
1894 return;
1895
1896 signals [signum - 1].pending = 1;
1897 evpipe_write (EV_A_ &sig_pending);
1898}
1899
1900static void
1901ev_sighandler (int signum)
1902{
757#ifndef _WIN32 1903#ifdef _WIN32
1904 signal (signum, ev_sighandler);
1905#endif
1906
1907 ev_feed_signal (signum);
1908}
1909
1910void noinline
1911ev_feed_signal_event (EV_P_ int signum)
1912{
1913 WL w;
1914
1915 if (expect_false (signum <= 0 || signum > EV_NSIG))
1916 return;
1917
1918 --signum;
1919
1920#if EV_MULTIPLICITY
1921 /* it is permissible to try to feed a signal to the wrong loop */
1922 /* or, likely more useful, feeding a signal nobody is waiting for */
1923
1924 if (expect_false (signals [signum].loop != EV_A))
1925 return;
1926#endif
1927
1928 signals [signum].pending = 0;
1929
1930 for (w = signals [signum].head; w; w = w->next)
1931 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1932}
1933
1934#if EV_USE_SIGNALFD
1935static void
1936sigfdcb (EV_P_ ev_io *iow, int revents)
1937{
1938 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1939
1940 for (;;)
1941 {
1942 ssize_t res = read (sigfd, si, sizeof (si));
1943
1944 /* not ISO-C, as res might be -1, but works with SuS */
1945 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1946 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1947
1948 if (res < (ssize_t)sizeof (si))
1949 break;
1950 }
1951}
1952#endif
1953
1954#endif
1955
1956/*****************************************************************************/
1957
1958#if EV_CHILD_ENABLE
1959static WL childs [EV_PID_HASHSIZE];
758 1960
759static ev_signal childev; 1961static ev_signal childev;
760 1962
761void inline_speed 1963#ifndef WIFCONTINUED
1964# define WIFCONTINUED(status) 0
1965#endif
1966
1967/* handle a single child status event */
1968inline_speed void
762child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1969child_reap (EV_P_ int chain, int pid, int status)
763{ 1970{
764 ev_child *w; 1971 ev_child *w;
1972 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
765 1973
766 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1974 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1975 {
767 if (w->pid == pid || !w->pid) 1976 if ((w->pid == pid || !w->pid)
1977 && (!traced || (w->flags & 1)))
768 { 1978 {
769 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 1979 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
770 w->rpid = pid; 1980 w->rpid = pid;
771 w->rstatus = status; 1981 w->rstatus = status;
772 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1982 ev_feed_event (EV_A_ (W)w, EV_CHILD);
773 } 1983 }
1984 }
774} 1985}
775 1986
776#ifndef WCONTINUED 1987#ifndef WCONTINUED
777# define WCONTINUED 0 1988# define WCONTINUED 0
778#endif 1989#endif
779 1990
1991/* called on sigchld etc., calls waitpid */
780static void 1992static void
781childcb (EV_P_ ev_signal *sw, int revents) 1993childcb (EV_P_ ev_signal *sw, int revents)
782{ 1994{
783 int pid, status; 1995 int pid, status;
784 1996
… …
787 if (!WCONTINUED 1999 if (!WCONTINUED
788 || errno != EINVAL 2000 || errno != EINVAL
789 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2001 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
790 return; 2002 return;
791 2003
792 /* make sure we are called again until all childs have been reaped */ 2004 /* make sure we are called again until all children have been reaped */
793 /* we need to do it this way so that the callback gets called before we continue */ 2005 /* we need to do it this way so that the callback gets called before we continue */
794 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2006 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
795 2007
796 child_reap (EV_A_ sw, pid, pid, status); 2008 child_reap (EV_A_ pid, pid, status);
797 if (EV_PID_HASHSIZE > 1) 2009 if ((EV_PID_HASHSIZE) > 1)
798 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2010 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
799} 2011}
800 2012
801#endif 2013#endif
802 2014
803/*****************************************************************************/ 2015/*****************************************************************************/
804 2016
2017#if EV_USE_IOCP
2018# include "ev_iocp.c"
2019#endif
805#if EV_USE_PORT 2020#if EV_USE_PORT
806# include "ev_port.c" 2021# include "ev_port.c"
807#endif 2022#endif
808#if EV_USE_KQUEUE 2023#if EV_USE_KQUEUE
809# include "ev_kqueue.c" 2024# include "ev_kqueue.c"
… …
816#endif 2031#endif
817#if EV_USE_SELECT 2032#if EV_USE_SELECT
818# include "ev_select.c" 2033# include "ev_select.c"
819#endif 2034#endif
820 2035
821int 2036int ecb_cold
822ev_version_major (void) 2037ev_version_major (void)
823{ 2038{
824 return EV_VERSION_MAJOR; 2039 return EV_VERSION_MAJOR;
825} 2040}
826 2041
827int 2042int ecb_cold
828ev_version_minor (void) 2043ev_version_minor (void)
829{ 2044{
830 return EV_VERSION_MINOR; 2045 return EV_VERSION_MINOR;
831} 2046}
832 2047
833/* return true if we are running with elevated privileges and should ignore env variables */ 2048/* return true if we are running with elevated privileges and should ignore env variables */
834int inline_size 2049int inline_size ecb_cold
835enable_secure (void) 2050enable_secure (void)
836{ 2051{
837#ifdef _WIN32 2052#ifdef _WIN32
838 return 0; 2053 return 0;
839#else 2054#else
840 return getuid () != geteuid () 2055 return getuid () != geteuid ()
841 || getgid () != getegid (); 2056 || getgid () != getegid ();
842#endif 2057#endif
843} 2058}
844 2059
845unsigned int 2060unsigned int ecb_cold
846ev_supported_backends (void) 2061ev_supported_backends (void)
847{ 2062{
848 unsigned int flags = 0; 2063 unsigned int flags = 0;
849 2064
850 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2065 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
854 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2069 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
855 2070
856 return flags; 2071 return flags;
857} 2072}
858 2073
859unsigned int 2074unsigned int ecb_cold
860ev_recommended_backends (void) 2075ev_recommended_backends (void)
861{ 2076{
862 unsigned int flags = ev_supported_backends (); 2077 unsigned int flags = ev_supported_backends ();
863 2078
864#ifndef __NetBSD__ 2079#ifndef __NetBSD__
865 /* kqueue is borked on everything but netbsd apparently */ 2080 /* kqueue is borked on everything but netbsd apparently */
866 /* it usually doesn't work correctly on anything but sockets and pipes */ 2081 /* it usually doesn't work correctly on anything but sockets and pipes */
867 flags &= ~EVBACKEND_KQUEUE; 2082 flags &= ~EVBACKEND_KQUEUE;
868#endif 2083#endif
869#ifdef __APPLE__ 2084#ifdef __APPLE__
870 // flags &= ~EVBACKEND_KQUEUE; for documentation 2085 /* only select works correctly on that "unix-certified" platform */
871 flags &= ~EVBACKEND_POLL; 2086 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2087 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2088#endif
2089#ifdef __FreeBSD__
2090 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
872#endif 2091#endif
873 2092
874 return flags; 2093 return flags;
875} 2094}
876 2095
877unsigned int 2096unsigned int ecb_cold
878ev_embeddable_backends (void) 2097ev_embeddable_backends (void)
879{ 2098{
880 return EVBACKEND_EPOLL 2099 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
881 | EVBACKEND_KQUEUE 2100
882 | EVBACKEND_PORT; 2101 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2102 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2103 flags &= ~EVBACKEND_EPOLL;
2104
2105 return flags;
883} 2106}
884 2107
885unsigned int 2108unsigned int
886ev_backend (EV_P) 2109ev_backend (EV_P)
887{ 2110{
888 return backend; 2111 return backend;
889} 2112}
890 2113
2114#if EV_FEATURE_API
2115unsigned int
2116ev_iteration (EV_P)
2117{
2118 return loop_count;
2119}
2120
2121unsigned int
2122ev_depth (EV_P)
2123{
2124 return loop_depth;
2125}
2126
2127void
2128ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2129{
2130 io_blocktime = interval;
2131}
2132
2133void
2134ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2135{
2136 timeout_blocktime = interval;
2137}
2138
2139void
2140ev_set_userdata (EV_P_ void *data)
2141{
2142 userdata = data;
2143}
2144
2145void *
2146ev_userdata (EV_P)
2147{
2148 return userdata;
2149}
2150
2151void
2152ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2153{
2154 invoke_cb = invoke_pending_cb;
2155}
2156
2157void
2158ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2159{
2160 release_cb = release;
2161 acquire_cb = acquire;
2162}
2163#endif
2164
2165/* initialise a loop structure, must be zero-initialised */
891static void noinline 2166static void noinline ecb_cold
892loop_init (EV_P_ unsigned int flags) 2167loop_init (EV_P_ unsigned int flags)
893{ 2168{
894 if (!backend) 2169 if (!backend)
895 { 2170 {
2171 origflags = flags;
2172
2173#if EV_USE_REALTIME
2174 if (!have_realtime)
2175 {
2176 struct timespec ts;
2177
2178 if (!clock_gettime (CLOCK_REALTIME, &ts))
2179 have_realtime = 1;
2180 }
2181#endif
2182
896#if EV_USE_MONOTONIC 2183#if EV_USE_MONOTONIC
2184 if (!have_monotonic)
897 { 2185 {
898 struct timespec ts; 2186 struct timespec ts;
2187
899 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2188 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
900 have_monotonic = 1; 2189 have_monotonic = 1;
901 } 2190 }
902#endif 2191#endif
903 2192
904 ev_rt_now = ev_time (); 2193 /* pid check not overridable via env */
905 mn_now = get_clock (); 2194#ifndef _WIN32
906 now_floor = mn_now; 2195 if (flags & EVFLAG_FORKCHECK)
907 rtmn_diff = ev_rt_now - mn_now; 2196 curpid = getpid ();
2197#endif
908 2198
909 if (!(flags & EVFLAG_NOENV) 2199 if (!(flags & EVFLAG_NOENV)
910 && !enable_secure () 2200 && !enable_secure ()
911 && getenv ("LIBEV_FLAGS")) 2201 && getenv ("LIBEV_FLAGS"))
912 flags = atoi (getenv ("LIBEV_FLAGS")); 2202 flags = atoi (getenv ("LIBEV_FLAGS"));
913 2203
914 if (!(flags & 0x0000ffffUL)) 2204 ev_rt_now = ev_time ();
2205 mn_now = get_clock ();
2206 now_floor = mn_now;
2207 rtmn_diff = ev_rt_now - mn_now;
2208#if EV_FEATURE_API
2209 invoke_cb = ev_invoke_pending;
2210#endif
2211
2212 io_blocktime = 0.;
2213 timeout_blocktime = 0.;
2214 backend = 0;
2215 backend_fd = -1;
2216 sig_pending = 0;
2217#if EV_ASYNC_ENABLE
2218 async_pending = 0;
2219#endif
2220 pipe_write_skipped = 0;
2221 pipe_write_wanted = 0;
2222#if EV_USE_INOTIFY
2223 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2224#endif
2225#if EV_USE_SIGNALFD
2226 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2227#endif
2228
2229 if (!(flags & EVBACKEND_MASK))
915 flags |= ev_recommended_backends (); 2230 flags |= ev_recommended_backends ();
916 2231
917 backend = 0;
918 backend_fd = -1;
919#if EV_USE_INOTIFY 2232#if EV_USE_IOCP
920 fs_fd = -2; 2233 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
921#endif 2234#endif
922
923#if EV_USE_PORT 2235#if EV_USE_PORT
924 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2236 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
925#endif 2237#endif
926#if EV_USE_KQUEUE 2238#if EV_USE_KQUEUE
927 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2239 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
934#endif 2246#endif
935#if EV_USE_SELECT 2247#if EV_USE_SELECT
936 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2248 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
937#endif 2249#endif
938 2250
2251 ev_prepare_init (&pending_w, pendingcb);
2252
2253#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
939 ev_init (&sigev, sigcb); 2254 ev_init (&pipe_w, pipecb);
940 ev_set_priority (&sigev, EV_MAXPRI); 2255 ev_set_priority (&pipe_w, EV_MAXPRI);
2256#endif
941 } 2257 }
942} 2258}
943 2259
944static void noinline 2260/* free up a loop structure */
2261void ecb_cold
945loop_destroy (EV_P) 2262ev_loop_destroy (EV_P)
946{ 2263{
947 int i; 2264 int i;
2265
2266#if EV_MULTIPLICITY
2267 /* mimic free (0) */
2268 if (!EV_A)
2269 return;
2270#endif
2271
2272#if EV_CLEANUP_ENABLE
2273 /* queue cleanup watchers (and execute them) */
2274 if (expect_false (cleanupcnt))
2275 {
2276 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2277 EV_INVOKE_PENDING;
2278 }
2279#endif
2280
2281#if EV_CHILD_ENABLE
2282 if (ev_is_active (&childev))
2283 {
2284 ev_ref (EV_A); /* child watcher */
2285 ev_signal_stop (EV_A_ &childev);
2286 }
2287#endif
2288
2289 if (ev_is_active (&pipe_w))
2290 {
2291 /*ev_ref (EV_A);*/
2292 /*ev_io_stop (EV_A_ &pipe_w);*/
2293
2294#if EV_USE_EVENTFD
2295 if (evfd >= 0)
2296 close (evfd);
2297#endif
2298
2299 if (evpipe [0] >= 0)
2300 {
2301 EV_WIN32_CLOSE_FD (evpipe [0]);
2302 EV_WIN32_CLOSE_FD (evpipe [1]);
2303 }
2304 }
2305
2306#if EV_USE_SIGNALFD
2307 if (ev_is_active (&sigfd_w))
2308 close (sigfd);
2309#endif
948 2310
949#if EV_USE_INOTIFY 2311#if EV_USE_INOTIFY
950 if (fs_fd >= 0) 2312 if (fs_fd >= 0)
951 close (fs_fd); 2313 close (fs_fd);
952#endif 2314#endif
953 2315
954 if (backend_fd >= 0) 2316 if (backend_fd >= 0)
955 close (backend_fd); 2317 close (backend_fd);
956 2318
2319#if EV_USE_IOCP
2320 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2321#endif
957#if EV_USE_PORT 2322#if EV_USE_PORT
958 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2323 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
959#endif 2324#endif
960#if EV_USE_KQUEUE 2325#if EV_USE_KQUEUE
961 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2326 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
969#if EV_USE_SELECT 2334#if EV_USE_SELECT
970 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 2335 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
971#endif 2336#endif
972 2337
973 for (i = NUMPRI; i--; ) 2338 for (i = NUMPRI; i--; )
2339 {
974 array_free (pending, [i]); 2340 array_free (pending, [i]);
2341#if EV_IDLE_ENABLE
2342 array_free (idle, [i]);
2343#endif
2344 }
2345
2346 ev_free (anfds); anfds = 0; anfdmax = 0;
975 2347
976 /* have to use the microsoft-never-gets-it-right macro */ 2348 /* have to use the microsoft-never-gets-it-right macro */
2349 array_free (rfeed, EMPTY);
977 array_free (fdchange, EMPTY0); 2350 array_free (fdchange, EMPTY);
978 array_free (timer, EMPTY0); 2351 array_free (timer, EMPTY);
979#if EV_PERIODIC_ENABLE 2352#if EV_PERIODIC_ENABLE
980 array_free (periodic, EMPTY0); 2353 array_free (periodic, EMPTY);
981#endif 2354#endif
2355#if EV_FORK_ENABLE
2356 array_free (fork, EMPTY);
2357#endif
2358#if EV_CLEANUP_ENABLE
982 array_free (idle, EMPTY0); 2359 array_free (cleanup, EMPTY);
2360#endif
983 array_free (prepare, EMPTY0); 2361 array_free (prepare, EMPTY);
984 array_free (check, EMPTY0); 2362 array_free (check, EMPTY);
2363#if EV_ASYNC_ENABLE
2364 array_free (async, EMPTY);
2365#endif
985 2366
986 backend = 0; 2367 backend = 0;
987}
988 2368
2369#if EV_MULTIPLICITY
2370 if (ev_is_default_loop (EV_A))
2371#endif
2372 ev_default_loop_ptr = 0;
2373#if EV_MULTIPLICITY
2374 else
2375 ev_free (EV_A);
2376#endif
2377}
2378
2379#if EV_USE_INOTIFY
989void inline_size infy_fork (EV_P); 2380inline_size void infy_fork (EV_P);
2381#endif
990 2382
991void inline_size 2383inline_size void
992loop_fork (EV_P) 2384loop_fork (EV_P)
993{ 2385{
994#if EV_USE_PORT 2386#if EV_USE_PORT
995 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2387 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
996#endif 2388#endif
… …
1002#endif 2394#endif
1003#if EV_USE_INOTIFY 2395#if EV_USE_INOTIFY
1004 infy_fork (EV_A); 2396 infy_fork (EV_A);
1005#endif 2397#endif
1006 2398
1007 if (ev_is_active (&sigev)) 2399 if (ev_is_active (&pipe_w))
1008 { 2400 {
1009 /* default loop */ 2401 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1010 2402
1011 ev_ref (EV_A); 2403 ev_ref (EV_A);
1012 ev_io_stop (EV_A_ &sigev); 2404 ev_io_stop (EV_A_ &pipe_w);
1013 close (sigpipe [0]);
1014 close (sigpipe [1]);
1015 2405
1016 while (pipe (sigpipe)) 2406#if EV_USE_EVENTFD
1017 syserr ("(libev) error creating pipe"); 2407 if (evfd >= 0)
2408 close (evfd);
2409#endif
1018 2410
2411 if (evpipe [0] >= 0)
2412 {
2413 EV_WIN32_CLOSE_FD (evpipe [0]);
2414 EV_WIN32_CLOSE_FD (evpipe [1]);
2415 }
2416
2417#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1019 siginit (EV_A); 2418 evpipe_init (EV_A);
2419 /* now iterate over everything, in case we missed something */
2420 pipecb (EV_A_ &pipe_w, EV_READ);
2421#endif
1020 } 2422 }
1021 2423
1022 postfork = 0; 2424 postfork = 0;
1023} 2425}
1024 2426
1025#if EV_MULTIPLICITY 2427#if EV_MULTIPLICITY
2428
1026struct ev_loop * 2429struct ev_loop * ecb_cold
1027ev_loop_new (unsigned int flags) 2430ev_loop_new (unsigned int flags)
1028{ 2431{
1029 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2432 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1030 2433
1031 memset (loop, 0, sizeof (struct ev_loop)); 2434 memset (EV_A, 0, sizeof (struct ev_loop));
1032
1033 loop_init (EV_A_ flags); 2435 loop_init (EV_A_ flags);
1034 2436
1035 if (ev_backend (EV_A)) 2437 if (ev_backend (EV_A))
1036 return loop; 2438 return EV_A;
1037 2439
2440 ev_free (EV_A);
1038 return 0; 2441 return 0;
1039} 2442}
1040 2443
1041void 2444#endif /* multiplicity */
1042ev_loop_destroy (EV_P)
1043{
1044 loop_destroy (EV_A);
1045 ev_free (loop);
1046}
1047 2445
1048void 2446#if EV_VERIFY
1049ev_loop_fork (EV_P) 2447static void noinline ecb_cold
2448verify_watcher (EV_P_ W w)
1050{ 2449{
1051 postfork = 1; 2450 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1052}
1053 2451
2452 if (w->pending)
2453 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2454}
2455
2456static void noinline ecb_cold
2457verify_heap (EV_P_ ANHE *heap, int N)
2458{
2459 int i;
2460
2461 for (i = HEAP0; i < N + HEAP0; ++i)
2462 {
2463 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2464 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2465 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2466
2467 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2468 }
2469}
2470
2471static void noinline ecb_cold
2472array_verify (EV_P_ W *ws, int cnt)
2473{
2474 while (cnt--)
2475 {
2476 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2477 verify_watcher (EV_A_ ws [cnt]);
2478 }
2479}
2480#endif
2481
2482#if EV_FEATURE_API
2483void ecb_cold
2484ev_verify (EV_P)
2485{
2486#if EV_VERIFY
2487 int i;
2488 WL w;
2489
2490 assert (activecnt >= -1);
2491
2492 assert (fdchangemax >= fdchangecnt);
2493 for (i = 0; i < fdchangecnt; ++i)
2494 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2495
2496 assert (anfdmax >= 0);
2497 for (i = 0; i < anfdmax; ++i)
2498 for (w = anfds [i].head; w; w = w->next)
2499 {
2500 verify_watcher (EV_A_ (W)w);
2501 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2502 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2503 }
2504
2505 assert (timermax >= timercnt);
2506 verify_heap (EV_A_ timers, timercnt);
2507
2508#if EV_PERIODIC_ENABLE
2509 assert (periodicmax >= periodiccnt);
2510 verify_heap (EV_A_ periodics, periodiccnt);
2511#endif
2512
2513 for (i = NUMPRI; i--; )
2514 {
2515 assert (pendingmax [i] >= pendingcnt [i]);
2516#if EV_IDLE_ENABLE
2517 assert (idleall >= 0);
2518 assert (idlemax [i] >= idlecnt [i]);
2519 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2520#endif
2521 }
2522
2523#if EV_FORK_ENABLE
2524 assert (forkmax >= forkcnt);
2525 array_verify (EV_A_ (W *)forks, forkcnt);
2526#endif
2527
2528#if EV_CLEANUP_ENABLE
2529 assert (cleanupmax >= cleanupcnt);
2530 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2531#endif
2532
2533#if EV_ASYNC_ENABLE
2534 assert (asyncmax >= asynccnt);
2535 array_verify (EV_A_ (W *)asyncs, asynccnt);
2536#endif
2537
2538#if EV_PREPARE_ENABLE
2539 assert (preparemax >= preparecnt);
2540 array_verify (EV_A_ (W *)prepares, preparecnt);
2541#endif
2542
2543#if EV_CHECK_ENABLE
2544 assert (checkmax >= checkcnt);
2545 array_verify (EV_A_ (W *)checks, checkcnt);
2546#endif
2547
2548# if 0
2549#if EV_CHILD_ENABLE
2550 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2551 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2552#endif
2553# endif
2554#endif
2555}
1054#endif 2556#endif
1055 2557
1056#if EV_MULTIPLICITY 2558#if EV_MULTIPLICITY
1057struct ev_loop * 2559struct ev_loop * ecb_cold
1058ev_default_loop_init (unsigned int flags)
1059#else 2560#else
1060int 2561int
2562#endif
1061ev_default_loop (unsigned int flags) 2563ev_default_loop (unsigned int flags)
1062#endif
1063{ 2564{
1064 if (sigpipe [0] == sigpipe [1])
1065 if (pipe (sigpipe))
1066 return 0;
1067
1068 if (!ev_default_loop_ptr) 2565 if (!ev_default_loop_ptr)
1069 { 2566 {
1070#if EV_MULTIPLICITY 2567#if EV_MULTIPLICITY
1071 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2568 EV_P = ev_default_loop_ptr = &default_loop_struct;
1072#else 2569#else
1073 ev_default_loop_ptr = 1; 2570 ev_default_loop_ptr = 1;
1074#endif 2571#endif
1075 2572
1076 loop_init (EV_A_ flags); 2573 loop_init (EV_A_ flags);
1077 2574
1078 if (ev_backend (EV_A)) 2575 if (ev_backend (EV_A))
1079 { 2576 {
1080 siginit (EV_A); 2577#if EV_CHILD_ENABLE
1081
1082#ifndef _WIN32
1083 ev_signal_init (&childev, childcb, SIGCHLD); 2578 ev_signal_init (&childev, childcb, SIGCHLD);
1084 ev_set_priority (&childev, EV_MAXPRI); 2579 ev_set_priority (&childev, EV_MAXPRI);
1085 ev_signal_start (EV_A_ &childev); 2580 ev_signal_start (EV_A_ &childev);
1086 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2581 ev_unref (EV_A); /* child watcher should not keep loop alive */
1087#endif 2582#endif
… …
1092 2587
1093 return ev_default_loop_ptr; 2588 return ev_default_loop_ptr;
1094} 2589}
1095 2590
1096void 2591void
1097ev_default_destroy (void) 2592ev_loop_fork (EV_P)
1098{ 2593{
1099#if EV_MULTIPLICITY 2594 postfork = 1; /* must be in line with ev_default_fork */
1100 struct ev_loop *loop = ev_default_loop_ptr;
1101#endif
1102
1103#ifndef _WIN32
1104 ev_ref (EV_A); /* child watcher */
1105 ev_signal_stop (EV_A_ &childev);
1106#endif
1107
1108 ev_ref (EV_A); /* signal watcher */
1109 ev_io_stop (EV_A_ &sigev);
1110
1111 close (sigpipe [0]); sigpipe [0] = 0;
1112 close (sigpipe [1]); sigpipe [1] = 0;
1113
1114 loop_destroy (EV_A);
1115} 2595}
2596
2597/*****************************************************************************/
1116 2598
1117void 2599void
1118ev_default_fork (void) 2600ev_invoke (EV_P_ void *w, int revents)
1119{ 2601{
1120#if EV_MULTIPLICITY 2602 EV_CB_INVOKE ((W)w, revents);
1121 struct ev_loop *loop = ev_default_loop_ptr;
1122#endif
1123
1124 if (backend)
1125 postfork = 1;
1126} 2603}
1127 2604
1128/*****************************************************************************/ 2605unsigned int
1129 2606ev_pending_count (EV_P)
1130int inline_size
1131any_pending (EV_P)
1132{ 2607{
1133 int pri; 2608 int pri;
2609 unsigned int count = 0;
1134 2610
1135 for (pri = NUMPRI; pri--; ) 2611 for (pri = NUMPRI; pri--; )
1136 if (pendingcnt [pri]) 2612 count += pendingcnt [pri];
1137 return 1;
1138 2613
1139 return 0; 2614 return count;
1140} 2615}
1141 2616
1142void inline_speed 2617void noinline
1143call_pending (EV_P) 2618ev_invoke_pending (EV_P)
1144{ 2619{
1145 int pri; 2620 int pri;
1146 2621
1147 for (pri = NUMPRI; pri--; ) 2622 for (pri = NUMPRI; pri--; )
1148 while (pendingcnt [pri]) 2623 while (pendingcnt [pri])
1149 { 2624 {
1150 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2625 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1151 2626
1152 if (expect_true (p->w))
1153 {
1154 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1155
1156 p->w->pending = 0; 2627 p->w->pending = 0;
1157 EV_CB_INVOKE (p->w, p->events); 2628 EV_CB_INVOKE (p->w, p->events);
1158 } 2629 EV_FREQUENT_CHECK;
1159 } 2630 }
1160} 2631}
1161 2632
1162void inline_size 2633#if EV_IDLE_ENABLE
2634/* make idle watchers pending. this handles the "call-idle */
2635/* only when higher priorities are idle" logic */
2636inline_size void
2637idle_reify (EV_P)
2638{
2639 if (expect_false (idleall))
2640 {
2641 int pri;
2642
2643 for (pri = NUMPRI; pri--; )
2644 {
2645 if (pendingcnt [pri])
2646 break;
2647
2648 if (idlecnt [pri])
2649 {
2650 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2651 break;
2652 }
2653 }
2654 }
2655}
2656#endif
2657
2658/* make timers pending */
2659inline_size void
1163timers_reify (EV_P) 2660timers_reify (EV_P)
1164{ 2661{
2662 EV_FREQUENT_CHECK;
2663
1165 while (timercnt && ((WT)timers [0])->at <= mn_now) 2664 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1166 { 2665 {
1167 ev_timer *w = timers [0]; 2666 do
1168
1169 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1170
1171 /* first reschedule or stop timer */
1172 if (w->repeat)
1173 { 2667 {
2668 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2669
2670 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2671
2672 /* first reschedule or stop timer */
2673 if (w->repeat)
2674 {
2675 ev_at (w) += w->repeat;
2676 if (ev_at (w) < mn_now)
2677 ev_at (w) = mn_now;
2678
1174 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2679 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1175 2680
1176 ((WT)w)->at += w->repeat; 2681 ANHE_at_cache (timers [HEAP0]);
1177 if (((WT)w)->at < mn_now)
1178 ((WT)w)->at = mn_now;
1179
1180 downheap ((WT *)timers, timercnt, 0); 2682 downheap (timers, timercnt, HEAP0);
2683 }
2684 else
2685 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2686
2687 EV_FREQUENT_CHECK;
2688 feed_reverse (EV_A_ (W)w);
1181 } 2689 }
1182 else 2690 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1183 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1184 2691
1185 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2692 feed_reverse_done (EV_A_ EV_TIMER);
1186 } 2693 }
1187} 2694}
1188 2695
1189#if EV_PERIODIC_ENABLE 2696#if EV_PERIODIC_ENABLE
1190void inline_size 2697
2698static void noinline
2699periodic_recalc (EV_P_ ev_periodic *w)
2700{
2701 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2702 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2703
2704 /* the above almost always errs on the low side */
2705 while (at <= ev_rt_now)
2706 {
2707 ev_tstamp nat = at + w->interval;
2708
2709 /* when resolution fails us, we use ev_rt_now */
2710 if (expect_false (nat == at))
2711 {
2712 at = ev_rt_now;
2713 break;
2714 }
2715
2716 at = nat;
2717 }
2718
2719 ev_at (w) = at;
2720}
2721
2722/* make periodics pending */
2723inline_size void
1191periodics_reify (EV_P) 2724periodics_reify (EV_P)
1192{ 2725{
2726 EV_FREQUENT_CHECK;
2727
1193 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2728 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1194 { 2729 {
1195 ev_periodic *w = periodics [0]; 2730 int feed_count = 0;
1196 2731
2732 do
2733 {
2734 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2735
1197 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2736 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1198 2737
1199 /* first reschedule or stop timer */ 2738 /* first reschedule or stop timer */
2739 if (w->reschedule_cb)
2740 {
2741 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2742
2743 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2744
2745 ANHE_at_cache (periodics [HEAP0]);
2746 downheap (periodics, periodiccnt, HEAP0);
2747 }
2748 else if (w->interval)
2749 {
2750 periodic_recalc (EV_A_ w);
2751 ANHE_at_cache (periodics [HEAP0]);
2752 downheap (periodics, periodiccnt, HEAP0);
2753 }
2754 else
2755 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2756
2757 EV_FREQUENT_CHECK;
2758 feed_reverse (EV_A_ (W)w);
2759 }
2760 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2761
2762 feed_reverse_done (EV_A_ EV_PERIODIC);
2763 }
2764}
2765
2766/* simply recalculate all periodics */
2767/* TODO: maybe ensure that at least one event happens when jumping forward? */
2768static void noinline ecb_cold
2769periodics_reschedule (EV_P)
2770{
2771 int i;
2772
2773 /* adjust periodics after time jump */
2774 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2775 {
2776 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2777
1200 if (w->reschedule_cb) 2778 if (w->reschedule_cb)
2779 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2780 else if (w->interval)
2781 periodic_recalc (EV_A_ w);
2782
2783 ANHE_at_cache (periodics [i]);
2784 }
2785
2786 reheap (periodics, periodiccnt);
2787}
2788#endif
2789
2790/* adjust all timers by a given offset */
2791static void noinline ecb_cold
2792timers_reschedule (EV_P_ ev_tstamp adjust)
2793{
2794 int i;
2795
2796 for (i = 0; i < timercnt; ++i)
2797 {
2798 ANHE *he = timers + i + HEAP0;
2799 ANHE_w (*he)->at += adjust;
2800 ANHE_at_cache (*he);
2801 }
2802}
2803
2804/* fetch new monotonic and realtime times from the kernel */
2805/* also detect if there was a timejump, and act accordingly */
2806inline_speed void
2807time_update (EV_P_ ev_tstamp max_block)
2808{
2809#if EV_USE_MONOTONIC
2810 if (expect_true (have_monotonic))
2811 {
2812 int i;
2813 ev_tstamp odiff = rtmn_diff;
2814
2815 mn_now = get_clock ();
2816
2817 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2818 /* interpolate in the meantime */
2819 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1201 { 2820 {
1202 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2821 ev_rt_now = rtmn_diff + mn_now;
1203 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2822 return;
1204 downheap ((WT *)periodics, periodiccnt, 0);
1205 } 2823 }
1206 else if (w->interval)
1207 {
1208 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1209 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1210 downheap ((WT *)periodics, periodiccnt, 0);
1211 }
1212 else
1213 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1214 2824
1215 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1216 }
1217}
1218
1219static void noinline
1220periodics_reschedule (EV_P)
1221{
1222 int i;
1223
1224 /* adjust periodics after time jump */
1225 for (i = 0; i < periodiccnt; ++i)
1226 {
1227 ev_periodic *w = periodics [i];
1228
1229 if (w->reschedule_cb)
1230 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1231 else if (w->interval)
1232 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1233 }
1234
1235 /* now rebuild the heap */
1236 for (i = periodiccnt >> 1; i--; )
1237 downheap ((WT *)periodics, periodiccnt, i);
1238}
1239#endif
1240
1241int inline_size
1242time_update_monotonic (EV_P)
1243{
1244 mn_now = get_clock ();
1245
1246 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1247 {
1248 ev_rt_now = rtmn_diff + mn_now;
1249 return 0;
1250 }
1251 else
1252 {
1253 now_floor = mn_now; 2825 now_floor = mn_now;
1254 ev_rt_now = ev_time (); 2826 ev_rt_now = ev_time ();
1255 return 1;
1256 }
1257}
1258 2827
1259void inline_size 2828 /* loop a few times, before making important decisions.
1260time_update (EV_P) 2829 * on the choice of "4": one iteration isn't enough,
1261{ 2830 * in case we get preempted during the calls to
1262 int i; 2831 * ev_time and get_clock. a second call is almost guaranteed
1263 2832 * to succeed in that case, though. and looping a few more times
1264#if EV_USE_MONOTONIC 2833 * doesn't hurt either as we only do this on time-jumps or
1265 if (expect_true (have_monotonic)) 2834 * in the unlikely event of having been preempted here.
1266 { 2835 */
1267 if (time_update_monotonic (EV_A)) 2836 for (i = 4; --i; )
1268 { 2837 {
1269 ev_tstamp odiff = rtmn_diff; 2838 ev_tstamp diff;
1270
1271 /* loop a few times, before making important decisions.
1272 * on the choice of "4": one iteration isn't enough,
1273 * in case we get preempted during the calls to
1274 * ev_time and get_clock. a second call is almost guaranteed
1275 * to succeed in that case, though. and looping a few more times
1276 * doesn't hurt either as we only do this on time-jumps or
1277 * in the unlikely event of having been preempted here.
1278 */
1279 for (i = 4; --i; )
1280 {
1281 rtmn_diff = ev_rt_now - mn_now; 2839 rtmn_diff = ev_rt_now - mn_now;
1282 2840
1283 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2841 diff = odiff - rtmn_diff;
2842
2843 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1284 return; /* all is well */ 2844 return; /* all is well */
1285 2845
1286 ev_rt_now = ev_time (); 2846 ev_rt_now = ev_time ();
1287 mn_now = get_clock (); 2847 mn_now = get_clock ();
1288 now_floor = mn_now; 2848 now_floor = mn_now;
1289 } 2849 }
1290 2850
2851 /* no timer adjustment, as the monotonic clock doesn't jump */
2852 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1291# if EV_PERIODIC_ENABLE 2853# if EV_PERIODIC_ENABLE
1292 periodics_reschedule (EV_A); 2854 periodics_reschedule (EV_A);
1293# endif 2855# endif
1294 /* no timer adjustment, as the monotonic clock doesn't jump */
1295 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1296 }
1297 } 2856 }
1298 else 2857 else
1299#endif 2858#endif
1300 { 2859 {
1301 ev_rt_now = ev_time (); 2860 ev_rt_now = ev_time ();
1302 2861
1303 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2862 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1304 { 2863 {
2864 /* adjust timers. this is easy, as the offset is the same for all of them */
2865 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1305#if EV_PERIODIC_ENABLE 2866#if EV_PERIODIC_ENABLE
1306 periodics_reschedule (EV_A); 2867 periodics_reschedule (EV_A);
1307#endif 2868#endif
1308
1309 /* adjust timers. this is easy, as the offset is the same for all of them */
1310 for (i = 0; i < timercnt; ++i)
1311 ((WT)timers [i])->at += ev_rt_now - mn_now;
1312 } 2869 }
1313 2870
1314 mn_now = ev_rt_now; 2871 mn_now = ev_rt_now;
1315 } 2872 }
1316} 2873}
1317 2874
1318void 2875void
1319ev_ref (EV_P)
1320{
1321 ++activecnt;
1322}
1323
1324void
1325ev_unref (EV_P)
1326{
1327 --activecnt;
1328}
1329
1330static int loop_done;
1331
1332void
1333ev_loop (EV_P_ int flags) 2876ev_run (EV_P_ int flags)
1334{ 2877{
1335 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2878#if EV_FEATURE_API
1336 ? EVUNLOOP_ONE 2879 ++loop_depth;
1337 : EVUNLOOP_CANCEL; 2880#endif
1338 2881
1339 while (activecnt) 2882 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2883
2884 loop_done = EVBREAK_CANCEL;
2885
2886 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2887
2888 do
1340 { 2889 {
2890#if EV_VERIFY >= 2
2891 ev_verify (EV_A);
2892#endif
2893
2894#ifndef _WIN32
2895 if (expect_false (curpid)) /* penalise the forking check even more */
2896 if (expect_false (getpid () != curpid))
2897 {
2898 curpid = getpid ();
2899 postfork = 1;
2900 }
2901#endif
2902
1341#if EV_FORK_ENABLE 2903#if EV_FORK_ENABLE
1342 /* we might have forked, so queue fork handlers */ 2904 /* we might have forked, so queue fork handlers */
1343 if (expect_false (postfork)) 2905 if (expect_false (postfork))
1344 if (forkcnt) 2906 if (forkcnt)
1345 { 2907 {
1346 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2908 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1347 call_pending (EV_A); 2909 EV_INVOKE_PENDING;
1348 } 2910 }
1349#endif 2911#endif
1350 2912
2913#if EV_PREPARE_ENABLE
1351 /* queue check watchers (and execute them) */ 2914 /* queue prepare watchers (and execute them) */
1352 if (expect_false (preparecnt)) 2915 if (expect_false (preparecnt))
1353 { 2916 {
1354 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2917 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1355 call_pending (EV_A); 2918 EV_INVOKE_PENDING;
1356 } 2919 }
2920#endif
2921
2922 if (expect_false (loop_done))
2923 break;
1357 2924
1358 /* we might have forked, so reify kernel state if necessary */ 2925 /* we might have forked, so reify kernel state if necessary */
1359 if (expect_false (postfork)) 2926 if (expect_false (postfork))
1360 loop_fork (EV_A); 2927 loop_fork (EV_A);
1361 2928
1362 /* update fd-related kernel structures */ 2929 /* update fd-related kernel structures */
1363 fd_reify (EV_A); 2930 fd_reify (EV_A);
1364 2931
1365 /* calculate blocking time */ 2932 /* calculate blocking time */
1366 { 2933 {
1367 ev_tstamp block; 2934 ev_tstamp waittime = 0.;
2935 ev_tstamp sleeptime = 0.;
1368 2936
1369 if (flags & EVLOOP_NONBLOCK || idlecnt) 2937 /* remember old timestamp for io_blocktime calculation */
1370 block = 0.; /* do not block at all */ 2938 ev_tstamp prev_mn_now = mn_now;
1371 else 2939
2940 /* update time to cancel out callback processing overhead */
2941 time_update (EV_A_ 1e100);
2942
2943 /* from now on, we want a pipe-wake-up */
2944 pipe_write_wanted = 1;
2945
2946 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2947
2948 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1372 { 2949 {
1373 /* update time to cancel out callback processing overhead */
1374#if EV_USE_MONOTONIC
1375 if (expect_true (have_monotonic))
1376 time_update_monotonic (EV_A);
1377 else
1378#endif
1379 {
1380 ev_rt_now = ev_time ();
1381 mn_now = ev_rt_now;
1382 }
1383
1384 block = MAX_BLOCKTIME; 2950 waittime = MAX_BLOCKTIME;
1385 2951
1386 if (timercnt) 2952 if (timercnt)
1387 { 2953 {
1388 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2954 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1389 if (block > to) block = to; 2955 if (waittime > to) waittime = to;
1390 } 2956 }
1391 2957
1392#if EV_PERIODIC_ENABLE 2958#if EV_PERIODIC_ENABLE
1393 if (periodiccnt) 2959 if (periodiccnt)
1394 { 2960 {
1395 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2961 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1396 if (block > to) block = to; 2962 if (waittime > to) waittime = to;
1397 } 2963 }
1398#endif 2964#endif
1399 2965
2966 /* don't let timeouts decrease the waittime below timeout_blocktime */
2967 if (expect_false (waittime < timeout_blocktime))
2968 waittime = timeout_blocktime;
2969
2970 /* at this point, we NEED to wait, so we have to ensure */
2971 /* to pass a minimum nonzero value to the backend */
2972 if (expect_false (waittime < backend_mintime))
2973 waittime = backend_mintime;
2974
2975 /* extra check because io_blocktime is commonly 0 */
1400 if (expect_false (block < 0.)) block = 0.; 2976 if (expect_false (io_blocktime))
2977 {
2978 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2979
2980 if (sleeptime > waittime - backend_mintime)
2981 sleeptime = waittime - backend_mintime;
2982
2983 if (expect_true (sleeptime > 0.))
2984 {
2985 ev_sleep (sleeptime);
2986 waittime -= sleeptime;
2987 }
2988 }
1401 } 2989 }
1402 2990
2991#if EV_FEATURE_API
2992 ++loop_count;
2993#endif
2994 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1403 backend_poll (EV_A_ block); 2995 backend_poll (EV_A_ waittime);
2996 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2997
2998 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2999
3000 if (pipe_write_skipped)
3001 {
3002 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3003 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3004 }
3005
3006
3007 /* update ev_rt_now, do magic */
3008 time_update (EV_A_ waittime + sleeptime);
1404 } 3009 }
1405
1406 /* update ev_rt_now, do magic */
1407 time_update (EV_A);
1408 3010
1409 /* queue pending timers and reschedule them */ 3011 /* queue pending timers and reschedule them */
1410 timers_reify (EV_A); /* relative timers called last */ 3012 timers_reify (EV_A); /* relative timers called last */
1411#if EV_PERIODIC_ENABLE 3013#if EV_PERIODIC_ENABLE
1412 periodics_reify (EV_A); /* absolute timers called first */ 3014 periodics_reify (EV_A); /* absolute timers called first */
1413#endif 3015#endif
1414 3016
3017#if EV_IDLE_ENABLE
1415 /* queue idle watchers unless other events are pending */ 3018 /* queue idle watchers unless other events are pending */
1416 if (idlecnt && !any_pending (EV_A)) 3019 idle_reify (EV_A);
1417 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3020#endif
1418 3021
3022#if EV_CHECK_ENABLE
1419 /* queue check watchers, to be executed first */ 3023 /* queue check watchers, to be executed first */
1420 if (expect_false (checkcnt)) 3024 if (expect_false (checkcnt))
1421 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3025 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3026#endif
1422 3027
1423 call_pending (EV_A); 3028 EV_INVOKE_PENDING;
1424
1425 if (expect_false (loop_done))
1426 break;
1427 } 3029 }
3030 while (expect_true (
3031 activecnt
3032 && !loop_done
3033 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3034 ));
1428 3035
1429 if (loop_done == EVUNLOOP_ONE) 3036 if (loop_done == EVBREAK_ONE)
1430 loop_done = EVUNLOOP_CANCEL; 3037 loop_done = EVBREAK_CANCEL;
3038
3039#if EV_FEATURE_API
3040 --loop_depth;
3041#endif
1431} 3042}
1432 3043
1433void 3044void
1434ev_unloop (EV_P_ int how) 3045ev_break (EV_P_ int how)
1435{ 3046{
1436 loop_done = how; 3047 loop_done = how;
1437} 3048}
1438 3049
3050void
3051ev_ref (EV_P)
3052{
3053 ++activecnt;
3054}
3055
3056void
3057ev_unref (EV_P)
3058{
3059 --activecnt;
3060}
3061
3062void
3063ev_now_update (EV_P)
3064{
3065 time_update (EV_A_ 1e100);
3066}
3067
3068void
3069ev_suspend (EV_P)
3070{
3071 ev_now_update (EV_A);
3072}
3073
3074void
3075ev_resume (EV_P)
3076{
3077 ev_tstamp mn_prev = mn_now;
3078
3079 ev_now_update (EV_A);
3080 timers_reschedule (EV_A_ mn_now - mn_prev);
3081#if EV_PERIODIC_ENABLE
3082 /* TODO: really do this? */
3083 periodics_reschedule (EV_A);
3084#endif
3085}
3086
1439/*****************************************************************************/ 3087/*****************************************************************************/
3088/* singly-linked list management, used when the expected list length is short */
1440 3089
1441void inline_size 3090inline_size void
1442wlist_add (WL *head, WL elem) 3091wlist_add (WL *head, WL elem)
1443{ 3092{
1444 elem->next = *head; 3093 elem->next = *head;
1445 *head = elem; 3094 *head = elem;
1446} 3095}
1447 3096
1448void inline_size 3097inline_size void
1449wlist_del (WL *head, WL elem) 3098wlist_del (WL *head, WL elem)
1450{ 3099{
1451 while (*head) 3100 while (*head)
1452 { 3101 {
1453 if (*head == elem) 3102 if (expect_true (*head == elem))
1454 { 3103 {
1455 *head = elem->next; 3104 *head = elem->next;
1456 return; 3105 break;
1457 } 3106 }
1458 3107
1459 head = &(*head)->next; 3108 head = &(*head)->next;
1460 } 3109 }
1461} 3110}
1462 3111
1463void inline_speed 3112/* internal, faster, version of ev_clear_pending */
3113inline_speed void
1464ev_clear_pending (EV_P_ W w) 3114clear_pending (EV_P_ W w)
1465{ 3115{
1466 if (w->pending) 3116 if (w->pending)
1467 { 3117 {
1468 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3118 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1469 w->pending = 0; 3119 w->pending = 0;
1470 } 3120 }
1471} 3121}
1472 3122
1473void inline_speed 3123int
3124ev_clear_pending (EV_P_ void *w)
3125{
3126 W w_ = (W)w;
3127 int pending = w_->pending;
3128
3129 if (expect_true (pending))
3130 {
3131 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3132 p->w = (W)&pending_w;
3133 w_->pending = 0;
3134 return p->events;
3135 }
3136 else
3137 return 0;
3138}
3139
3140inline_size void
3141pri_adjust (EV_P_ W w)
3142{
3143 int pri = ev_priority (w);
3144 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3145 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3146 ev_set_priority (w, pri);
3147}
3148
3149inline_speed void
1474ev_start (EV_P_ W w, int active) 3150ev_start (EV_P_ W w, int active)
1475{ 3151{
1476 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3152 pri_adjust (EV_A_ w);
1477 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1478
1479 w->active = active; 3153 w->active = active;
1480 ev_ref (EV_A); 3154 ev_ref (EV_A);
1481} 3155}
1482 3156
1483void inline_size 3157inline_size void
1484ev_stop (EV_P_ W w) 3158ev_stop (EV_P_ W w)
1485{ 3159{
1486 ev_unref (EV_A); 3160 ev_unref (EV_A);
1487 w->active = 0; 3161 w->active = 0;
1488} 3162}
1489 3163
1490/*****************************************************************************/ 3164/*****************************************************************************/
1491 3165
1492void 3166void noinline
1493ev_io_start (EV_P_ ev_io *w) 3167ev_io_start (EV_P_ ev_io *w)
1494{ 3168{
1495 int fd = w->fd; 3169 int fd = w->fd;
1496 3170
1497 if (expect_false (ev_is_active (w))) 3171 if (expect_false (ev_is_active (w)))
1498 return; 3172 return;
1499 3173
1500 assert (("ev_io_start called with negative fd", fd >= 0)); 3174 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3175 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3176
3177 EV_FREQUENT_CHECK;
1501 3178
1502 ev_start (EV_A_ (W)w, 1); 3179 ev_start (EV_A_ (W)w, 1);
1503 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3180 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1504 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3181 wlist_add (&anfds[fd].head, (WL)w);
1505 3182
1506 fd_change (EV_A_ fd); 3183 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1507} 3184 w->events &= ~EV__IOFDSET;
1508 3185
1509void 3186 EV_FREQUENT_CHECK;
3187}
3188
3189void noinline
1510ev_io_stop (EV_P_ ev_io *w) 3190ev_io_stop (EV_P_ ev_io *w)
1511{ 3191{
1512 ev_clear_pending (EV_A_ (W)w); 3192 clear_pending (EV_A_ (W)w);
1513 if (expect_false (!ev_is_active (w))) 3193 if (expect_false (!ev_is_active (w)))
1514 return; 3194 return;
1515 3195
1516 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3196 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1517 3197
3198 EV_FREQUENT_CHECK;
3199
1518 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3200 wlist_del (&anfds[w->fd].head, (WL)w);
1519 ev_stop (EV_A_ (W)w); 3201 ev_stop (EV_A_ (W)w);
1520 3202
1521 fd_change (EV_A_ w->fd); 3203 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1522}
1523 3204
1524void 3205 EV_FREQUENT_CHECK;
3206}
3207
3208void noinline
1525ev_timer_start (EV_P_ ev_timer *w) 3209ev_timer_start (EV_P_ ev_timer *w)
1526{ 3210{
1527 if (expect_false (ev_is_active (w))) 3211 if (expect_false (ev_is_active (w)))
1528 return; 3212 return;
1529 3213
1530 ((WT)w)->at += mn_now; 3214 ev_at (w) += mn_now;
1531 3215
1532 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3216 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1533 3217
3218 EV_FREQUENT_CHECK;
3219
3220 ++timercnt;
1534 ev_start (EV_A_ (W)w, ++timercnt); 3221 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1535 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 3222 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1536 timers [timercnt - 1] = w; 3223 ANHE_w (timers [ev_active (w)]) = (WT)w;
1537 upheap ((WT *)timers, timercnt - 1); 3224 ANHE_at_cache (timers [ev_active (w)]);
3225 upheap (timers, ev_active (w));
1538 3226
3227 EV_FREQUENT_CHECK;
3228
1539 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3229 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1540} 3230}
1541 3231
1542void 3232void noinline
1543ev_timer_stop (EV_P_ ev_timer *w) 3233ev_timer_stop (EV_P_ ev_timer *w)
1544{ 3234{
1545 ev_clear_pending (EV_A_ (W)w); 3235 clear_pending (EV_A_ (W)w);
1546 if (expect_false (!ev_is_active (w))) 3236 if (expect_false (!ev_is_active (w)))
1547 return; 3237 return;
1548 3238
1549 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3239 EV_FREQUENT_CHECK;
1550 3240
1551 { 3241 {
1552 int active = ((W)w)->active; 3242 int active = ev_active (w);
1553 3243
3244 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3245
3246 --timercnt;
3247
1554 if (expect_true (--active < --timercnt)) 3248 if (expect_true (active < timercnt + HEAP0))
1555 { 3249 {
1556 timers [active] = timers [timercnt]; 3250 timers [active] = timers [timercnt + HEAP0];
1557 adjustheap ((WT *)timers, timercnt, active); 3251 adjustheap (timers, timercnt, active);
1558 } 3252 }
1559 } 3253 }
1560 3254
1561 ((WT)w)->at -= mn_now; 3255 ev_at (w) -= mn_now;
1562 3256
1563 ev_stop (EV_A_ (W)w); 3257 ev_stop (EV_A_ (W)w);
1564}
1565 3258
1566void 3259 EV_FREQUENT_CHECK;
3260}
3261
3262void noinline
1567ev_timer_again (EV_P_ ev_timer *w) 3263ev_timer_again (EV_P_ ev_timer *w)
1568{ 3264{
3265 EV_FREQUENT_CHECK;
3266
1569 if (ev_is_active (w)) 3267 if (ev_is_active (w))
1570 { 3268 {
1571 if (w->repeat) 3269 if (w->repeat)
1572 { 3270 {
1573 ((WT)w)->at = mn_now + w->repeat; 3271 ev_at (w) = mn_now + w->repeat;
3272 ANHE_at_cache (timers [ev_active (w)]);
1574 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3273 adjustheap (timers, timercnt, ev_active (w));
1575 } 3274 }
1576 else 3275 else
1577 ev_timer_stop (EV_A_ w); 3276 ev_timer_stop (EV_A_ w);
1578 } 3277 }
1579 else if (w->repeat) 3278 else if (w->repeat)
1580 { 3279 {
1581 w->at = w->repeat; 3280 ev_at (w) = w->repeat;
1582 ev_timer_start (EV_A_ w); 3281 ev_timer_start (EV_A_ w);
1583 } 3282 }
3283
3284 EV_FREQUENT_CHECK;
3285}
3286
3287ev_tstamp
3288ev_timer_remaining (EV_P_ ev_timer *w)
3289{
3290 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1584} 3291}
1585 3292
1586#if EV_PERIODIC_ENABLE 3293#if EV_PERIODIC_ENABLE
1587void 3294void noinline
1588ev_periodic_start (EV_P_ ev_periodic *w) 3295ev_periodic_start (EV_P_ ev_periodic *w)
1589{ 3296{
1590 if (expect_false (ev_is_active (w))) 3297 if (expect_false (ev_is_active (w)))
1591 return; 3298 return;
1592 3299
1593 if (w->reschedule_cb) 3300 if (w->reschedule_cb)
1594 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3301 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1595 else if (w->interval) 3302 else if (w->interval)
1596 { 3303 {
1597 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3304 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1598 /* this formula differs from the one in periodic_reify because we do not always round up */ 3305 periodic_recalc (EV_A_ w);
1599 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1600 } 3306 }
3307 else
3308 ev_at (w) = w->offset;
1601 3309
3310 EV_FREQUENT_CHECK;
3311
3312 ++periodiccnt;
1602 ev_start (EV_A_ (W)w, ++periodiccnt); 3313 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1603 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3314 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1604 periodics [periodiccnt - 1] = w; 3315 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1605 upheap ((WT *)periodics, periodiccnt - 1); 3316 ANHE_at_cache (periodics [ev_active (w)]);
3317 upheap (periodics, ev_active (w));
1606 3318
3319 EV_FREQUENT_CHECK;
3320
1607 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3321 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1608} 3322}
1609 3323
1610void 3324void noinline
1611ev_periodic_stop (EV_P_ ev_periodic *w) 3325ev_periodic_stop (EV_P_ ev_periodic *w)
1612{ 3326{
1613 ev_clear_pending (EV_A_ (W)w); 3327 clear_pending (EV_A_ (W)w);
1614 if (expect_false (!ev_is_active (w))) 3328 if (expect_false (!ev_is_active (w)))
1615 return; 3329 return;
1616 3330
1617 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3331 EV_FREQUENT_CHECK;
1618 3332
1619 { 3333 {
1620 int active = ((W)w)->active; 3334 int active = ev_active (w);
1621 3335
3336 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3337
3338 --periodiccnt;
3339
1622 if (expect_true (--active < --periodiccnt)) 3340 if (expect_true (active < periodiccnt + HEAP0))
1623 { 3341 {
1624 periodics [active] = periodics [periodiccnt]; 3342 periodics [active] = periodics [periodiccnt + HEAP0];
1625 adjustheap ((WT *)periodics, periodiccnt, active); 3343 adjustheap (periodics, periodiccnt, active);
1626 } 3344 }
1627 } 3345 }
1628 3346
1629 ev_stop (EV_A_ (W)w); 3347 ev_stop (EV_A_ (W)w);
1630}
1631 3348
1632void 3349 EV_FREQUENT_CHECK;
3350}
3351
3352void noinline
1633ev_periodic_again (EV_P_ ev_periodic *w) 3353ev_periodic_again (EV_P_ ev_periodic *w)
1634{ 3354{
1635 /* TODO: use adjustheap and recalculation */ 3355 /* TODO: use adjustheap and recalculation */
1636 ev_periodic_stop (EV_A_ w); 3356 ev_periodic_stop (EV_A_ w);
1637 ev_periodic_start (EV_A_ w); 3357 ev_periodic_start (EV_A_ w);
… …
1640 3360
1641#ifndef SA_RESTART 3361#ifndef SA_RESTART
1642# define SA_RESTART 0 3362# define SA_RESTART 0
1643#endif 3363#endif
1644 3364
1645void 3365#if EV_SIGNAL_ENABLE
3366
3367void noinline
1646ev_signal_start (EV_P_ ev_signal *w) 3368ev_signal_start (EV_P_ ev_signal *w)
1647{ 3369{
1648#if EV_MULTIPLICITY
1649 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1650#endif
1651 if (expect_false (ev_is_active (w))) 3370 if (expect_false (ev_is_active (w)))
1652 return; 3371 return;
1653 3372
1654 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3373 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3374
3375#if EV_MULTIPLICITY
3376 assert (("libev: a signal must not be attached to two different loops",
3377 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3378
3379 signals [w->signum - 1].loop = EV_A;
3380#endif
3381
3382 EV_FREQUENT_CHECK;
3383
3384#if EV_USE_SIGNALFD
3385 if (sigfd == -2)
3386 {
3387 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3388 if (sigfd < 0 && errno == EINVAL)
3389 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3390
3391 if (sigfd >= 0)
3392 {
3393 fd_intern (sigfd); /* doing it twice will not hurt */
3394
3395 sigemptyset (&sigfd_set);
3396
3397 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3398 ev_set_priority (&sigfd_w, EV_MAXPRI);
3399 ev_io_start (EV_A_ &sigfd_w);
3400 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3401 }
3402 }
3403
3404 if (sigfd >= 0)
3405 {
3406 /* TODO: check .head */
3407 sigaddset (&sigfd_set, w->signum);
3408 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3409
3410 signalfd (sigfd, &sigfd_set, 0);
3411 }
3412#endif
1655 3413
1656 ev_start (EV_A_ (W)w, 1); 3414 ev_start (EV_A_ (W)w, 1);
1657 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1658 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3415 wlist_add (&signals [w->signum - 1].head, (WL)w);
1659 3416
1660 if (!((WL)w)->next) 3417 if (!((WL)w)->next)
3418# if EV_USE_SIGNALFD
3419 if (sigfd < 0) /*TODO*/
3420# endif
1661 { 3421 {
1662#if _WIN32 3422# ifdef _WIN32
3423 evpipe_init (EV_A);
3424
1663 signal (w->signum, sighandler); 3425 signal (w->signum, ev_sighandler);
1664#else 3426# else
1665 struct sigaction sa; 3427 struct sigaction sa;
3428
3429 evpipe_init (EV_A);
3430
1666 sa.sa_handler = sighandler; 3431 sa.sa_handler = ev_sighandler;
1667 sigfillset (&sa.sa_mask); 3432 sigfillset (&sa.sa_mask);
1668 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3433 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1669 sigaction (w->signum, &sa, 0); 3434 sigaction (w->signum, &sa, 0);
3435
3436 if (origflags & EVFLAG_NOSIGMASK)
3437 {
3438 sigemptyset (&sa.sa_mask);
3439 sigaddset (&sa.sa_mask, w->signum);
3440 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3441 }
1670#endif 3442#endif
1671 } 3443 }
1672}
1673 3444
1674void 3445 EV_FREQUENT_CHECK;
3446}
3447
3448void noinline
1675ev_signal_stop (EV_P_ ev_signal *w) 3449ev_signal_stop (EV_P_ ev_signal *w)
1676{ 3450{
1677 ev_clear_pending (EV_A_ (W)w); 3451 clear_pending (EV_A_ (W)w);
1678 if (expect_false (!ev_is_active (w))) 3452 if (expect_false (!ev_is_active (w)))
1679 return; 3453 return;
1680 3454
3455 EV_FREQUENT_CHECK;
3456
1681 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3457 wlist_del (&signals [w->signum - 1].head, (WL)w);
1682 ev_stop (EV_A_ (W)w); 3458 ev_stop (EV_A_ (W)w);
1683 3459
1684 if (!signals [w->signum - 1].head) 3460 if (!signals [w->signum - 1].head)
3461 {
3462#if EV_MULTIPLICITY
3463 signals [w->signum - 1].loop = 0; /* unattach from signal */
3464#endif
3465#if EV_USE_SIGNALFD
3466 if (sigfd >= 0)
3467 {
3468 sigset_t ss;
3469
3470 sigemptyset (&ss);
3471 sigaddset (&ss, w->signum);
3472 sigdelset (&sigfd_set, w->signum);
3473
3474 signalfd (sigfd, &sigfd_set, 0);
3475 sigprocmask (SIG_UNBLOCK, &ss, 0);
3476 }
3477 else
3478#endif
1685 signal (w->signum, SIG_DFL); 3479 signal (w->signum, SIG_DFL);
3480 }
3481
3482 EV_FREQUENT_CHECK;
1686} 3483}
3484
3485#endif
3486
3487#if EV_CHILD_ENABLE
1687 3488
1688void 3489void
1689ev_child_start (EV_P_ ev_child *w) 3490ev_child_start (EV_P_ ev_child *w)
1690{ 3491{
1691#if EV_MULTIPLICITY 3492#if EV_MULTIPLICITY
1692 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3493 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1693#endif 3494#endif
1694 if (expect_false (ev_is_active (w))) 3495 if (expect_false (ev_is_active (w)))
1695 return; 3496 return;
1696 3497
3498 EV_FREQUENT_CHECK;
3499
1697 ev_start (EV_A_ (W)w, 1); 3500 ev_start (EV_A_ (W)w, 1);
1698 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3501 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3502
3503 EV_FREQUENT_CHECK;
1699} 3504}
1700 3505
1701void 3506void
1702ev_child_stop (EV_P_ ev_child *w) 3507ev_child_stop (EV_P_ ev_child *w)
1703{ 3508{
1704 ev_clear_pending (EV_A_ (W)w); 3509 clear_pending (EV_A_ (W)w);
1705 if (expect_false (!ev_is_active (w))) 3510 if (expect_false (!ev_is_active (w)))
1706 return; 3511 return;
1707 3512
3513 EV_FREQUENT_CHECK;
3514
1708 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3515 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1709 ev_stop (EV_A_ (W)w); 3516 ev_stop (EV_A_ (W)w);
3517
3518 EV_FREQUENT_CHECK;
1710} 3519}
3520
3521#endif
1711 3522
1712#if EV_STAT_ENABLE 3523#if EV_STAT_ENABLE
1713 3524
1714# ifdef _WIN32 3525# ifdef _WIN32
1715# undef lstat 3526# undef lstat
1716# define lstat(a,b) _stati64 (a,b) 3527# define lstat(a,b) _stati64 (a,b)
1717# endif 3528# endif
1718 3529
1719#define DEF_STAT_INTERVAL 5.0074891 3530#define DEF_STAT_INTERVAL 5.0074891
3531#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1720#define MIN_STAT_INTERVAL 0.1074891 3532#define MIN_STAT_INTERVAL 0.1074891
1721 3533
1722static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3534static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1723 3535
1724#if EV_USE_INOTIFY 3536#if EV_USE_INOTIFY
1725# define EV_INOTIFY_BUFSIZE 8192 3537
3538/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3539# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1726 3540
1727static void noinline 3541static void noinline
1728infy_add (EV_P_ ev_stat *w) 3542infy_add (EV_P_ ev_stat *w)
1729{ 3543{
1730 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); 3544 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);
1731 3545
1732 if (w->wd < 0) 3546 if (w->wd >= 0)
3547 {
3548 struct statfs sfs;
3549
3550 /* now local changes will be tracked by inotify, but remote changes won't */
3551 /* unless the filesystem is known to be local, we therefore still poll */
3552 /* also do poll on <2.6.25, but with normal frequency */
3553
3554 if (!fs_2625)
3555 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3556 else if (!statfs (w->path, &sfs)
3557 && (sfs.f_type == 0x1373 /* devfs */
3558 || sfs.f_type == 0xEF53 /* ext2/3 */
3559 || sfs.f_type == 0x3153464a /* jfs */
3560 || sfs.f_type == 0x52654973 /* reiser3 */
3561 || sfs.f_type == 0x01021994 /* tempfs */
3562 || sfs.f_type == 0x58465342 /* xfs */))
3563 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3564 else
3565 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1733 { 3566 }
1734 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3567 else
3568 {
3569 /* can't use inotify, continue to stat */
3570 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1735 3571
1736 /* monitor some parent directory for speedup hints */ 3572 /* if path is not there, monitor some parent directory for speedup hints */
3573 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3574 /* but an efficiency issue only */
1737 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3575 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1738 { 3576 {
1739 char path [4096]; 3577 char path [4096];
1740 strcpy (path, w->path); 3578 strcpy (path, w->path);
1741 3579
… …
1744 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3582 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1745 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3583 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1746 3584
1747 char *pend = strrchr (path, '/'); 3585 char *pend = strrchr (path, '/');
1748 3586
1749 if (!pend) 3587 if (!pend || pend == path)
1750 break; /* whoops, no '/', complain to your admin */ 3588 break;
1751 3589
1752 *pend = 0; 3590 *pend = 0;
1753 w->wd = inotify_add_watch (fs_fd, path, mask); 3591 w->wd = inotify_add_watch (fs_fd, path, mask);
1754 } 3592 }
1755 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3593 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1756 } 3594 }
1757 } 3595 }
1758 else
1759 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1760 3596
1761 if (w->wd >= 0) 3597 if (w->wd >= 0)
1762 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3598 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3599
3600 /* now re-arm timer, if required */
3601 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3602 ev_timer_again (EV_A_ &w->timer);
3603 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1763} 3604}
1764 3605
1765static void noinline 3606static void noinline
1766infy_del (EV_P_ ev_stat *w) 3607infy_del (EV_P_ ev_stat *w)
1767{ 3608{
… …
1770 3611
1771 if (wd < 0) 3612 if (wd < 0)
1772 return; 3613 return;
1773 3614
1774 w->wd = -2; 3615 w->wd = -2;
1775 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3616 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1776 wlist_del (&fs_hash [slot].head, (WL)w); 3617 wlist_del (&fs_hash [slot].head, (WL)w);
1777 3618
1778 /* remove this watcher, if others are watching it, they will rearm */ 3619 /* remove this watcher, if others are watching it, they will rearm */
1779 inotify_rm_watch (fs_fd, wd); 3620 inotify_rm_watch (fs_fd, wd);
1780} 3621}
1781 3622
1782static void noinline 3623static void noinline
1783infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3624infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1784{ 3625{
1785 if (slot < 0) 3626 if (slot < 0)
1786 /* overflow, need to check for all hahs slots */ 3627 /* overflow, need to check for all hash slots */
1787 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3628 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1788 infy_wd (EV_A_ slot, wd, ev); 3629 infy_wd (EV_A_ slot, wd, ev);
1789 else 3630 else
1790 { 3631 {
1791 WL w_; 3632 WL w_;
1792 3633
1793 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3634 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1794 { 3635 {
1795 ev_stat *w = (ev_stat *)w_; 3636 ev_stat *w = (ev_stat *)w_;
1796 w_ = w_->next; /* lets us remove this watcher and all before it */ 3637 w_ = w_->next; /* lets us remove this watcher and all before it */
1797 3638
1798 if (w->wd == wd || wd == -1) 3639 if (w->wd == wd || wd == -1)
1799 { 3640 {
1800 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3641 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1801 { 3642 {
3643 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1802 w->wd = -1; 3644 w->wd = -1;
1803 infy_add (EV_A_ w); /* re-add, no matter what */ 3645 infy_add (EV_A_ w); /* re-add, no matter what */
1804 } 3646 }
1805 3647
1806 stat_timer_cb (EV_A_ &w->timer, 0); 3648 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1811 3653
1812static void 3654static void
1813infy_cb (EV_P_ ev_io *w, int revents) 3655infy_cb (EV_P_ ev_io *w, int revents)
1814{ 3656{
1815 char buf [EV_INOTIFY_BUFSIZE]; 3657 char buf [EV_INOTIFY_BUFSIZE];
1816 struct inotify_event *ev = (struct inotify_event *)buf;
1817 int ofs; 3658 int ofs;
1818 int len = read (fs_fd, buf, sizeof (buf)); 3659 int len = read (fs_fd, buf, sizeof (buf));
1819 3660
1820 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3661 for (ofs = 0; ofs < len; )
3662 {
3663 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1821 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3664 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3665 ofs += sizeof (struct inotify_event) + ev->len;
3666 }
1822} 3667}
1823 3668
1824void inline_size 3669inline_size void ecb_cold
3670ev_check_2625 (EV_P)
3671{
3672 /* kernels < 2.6.25 are borked
3673 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3674 */
3675 if (ev_linux_version () < 0x020619)
3676 return;
3677
3678 fs_2625 = 1;
3679}
3680
3681inline_size int
3682infy_newfd (void)
3683{
3684#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3685 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3686 if (fd >= 0)
3687 return fd;
3688#endif
3689 return inotify_init ();
3690}
3691
3692inline_size void
1825infy_init (EV_P) 3693infy_init (EV_P)
1826{ 3694{
1827 if (fs_fd != -2) 3695 if (fs_fd != -2)
1828 return; 3696 return;
1829 3697
3698 fs_fd = -1;
3699
3700 ev_check_2625 (EV_A);
3701
1830 fs_fd = inotify_init (); 3702 fs_fd = infy_newfd ();
1831 3703
1832 if (fs_fd >= 0) 3704 if (fs_fd >= 0)
1833 { 3705 {
3706 fd_intern (fs_fd);
1834 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3707 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1835 ev_set_priority (&fs_w, EV_MAXPRI); 3708 ev_set_priority (&fs_w, EV_MAXPRI);
1836 ev_io_start (EV_A_ &fs_w); 3709 ev_io_start (EV_A_ &fs_w);
3710 ev_unref (EV_A);
1837 } 3711 }
1838} 3712}
1839 3713
1840void inline_size 3714inline_size void
1841infy_fork (EV_P) 3715infy_fork (EV_P)
1842{ 3716{
1843 int slot; 3717 int slot;
1844 3718
1845 if (fs_fd < 0) 3719 if (fs_fd < 0)
1846 return; 3720 return;
1847 3721
3722 ev_ref (EV_A);
3723 ev_io_stop (EV_A_ &fs_w);
1848 close (fs_fd); 3724 close (fs_fd);
1849 fs_fd = inotify_init (); 3725 fs_fd = infy_newfd ();
1850 3726
3727 if (fs_fd >= 0)
3728 {
3729 fd_intern (fs_fd);
3730 ev_io_set (&fs_w, fs_fd, EV_READ);
3731 ev_io_start (EV_A_ &fs_w);
3732 ev_unref (EV_A);
3733 }
3734
1851 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3735 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1852 { 3736 {
1853 WL w_ = fs_hash [slot].head; 3737 WL w_ = fs_hash [slot].head;
1854 fs_hash [slot].head = 0; 3738 fs_hash [slot].head = 0;
1855 3739
1856 while (w_) 3740 while (w_)
… …
1861 w->wd = -1; 3745 w->wd = -1;
1862 3746
1863 if (fs_fd >= 0) 3747 if (fs_fd >= 0)
1864 infy_add (EV_A_ w); /* re-add, no matter what */ 3748 infy_add (EV_A_ w); /* re-add, no matter what */
1865 else 3749 else
3750 {
3751 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3752 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1866 ev_timer_start (EV_A_ &w->timer); 3753 ev_timer_again (EV_A_ &w->timer);
3754 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3755 }
1867 } 3756 }
1868
1869 } 3757 }
1870} 3758}
1871 3759
3760#endif
3761
3762#ifdef _WIN32
3763# define EV_LSTAT(p,b) _stati64 (p, b)
3764#else
3765# define EV_LSTAT(p,b) lstat (p, b)
1872#endif 3766#endif
1873 3767
1874void 3768void
1875ev_stat_stat (EV_P_ ev_stat *w) 3769ev_stat_stat (EV_P_ ev_stat *w)
1876{ 3770{
… …
1883static void noinline 3777static void noinline
1884stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3778stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1885{ 3779{
1886 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3780 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1887 3781
1888 /* we copy this here each the time so that */ 3782 ev_statdata prev = w->attr;
1889 /* prev has the old value when the callback gets invoked */
1890 w->prev = w->attr;
1891 ev_stat_stat (EV_A_ w); 3783 ev_stat_stat (EV_A_ w);
1892 3784
1893 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3785 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1894 if ( 3786 if (
1895 w->prev.st_dev != w->attr.st_dev 3787 prev.st_dev != w->attr.st_dev
1896 || w->prev.st_ino != w->attr.st_ino 3788 || prev.st_ino != w->attr.st_ino
1897 || w->prev.st_mode != w->attr.st_mode 3789 || prev.st_mode != w->attr.st_mode
1898 || w->prev.st_nlink != w->attr.st_nlink 3790 || prev.st_nlink != w->attr.st_nlink
1899 || w->prev.st_uid != w->attr.st_uid 3791 || prev.st_uid != w->attr.st_uid
1900 || w->prev.st_gid != w->attr.st_gid 3792 || prev.st_gid != w->attr.st_gid
1901 || w->prev.st_rdev != w->attr.st_rdev 3793 || prev.st_rdev != w->attr.st_rdev
1902 || w->prev.st_size != w->attr.st_size 3794 || prev.st_size != w->attr.st_size
1903 || w->prev.st_atime != w->attr.st_atime 3795 || prev.st_atime != w->attr.st_atime
1904 || w->prev.st_mtime != w->attr.st_mtime 3796 || prev.st_mtime != w->attr.st_mtime
1905 || w->prev.st_ctime != w->attr.st_ctime 3797 || prev.st_ctime != w->attr.st_ctime
1906 ) { 3798 ) {
3799 /* we only update w->prev on actual differences */
3800 /* in case we test more often than invoke the callback, */
3801 /* to ensure that prev is always different to attr */
3802 w->prev = prev;
3803
1907 #if EV_USE_INOTIFY 3804 #if EV_USE_INOTIFY
3805 if (fs_fd >= 0)
3806 {
1908 infy_del (EV_A_ w); 3807 infy_del (EV_A_ w);
1909 infy_add (EV_A_ w); 3808 infy_add (EV_A_ w);
1910 ev_stat_stat (EV_A_ w); /* avoid race... */ 3809 ev_stat_stat (EV_A_ w); /* avoid race... */
3810 }
1911 #endif 3811 #endif
1912 3812
1913 ev_feed_event (EV_A_ w, EV_STAT); 3813 ev_feed_event (EV_A_ w, EV_STAT);
1914 } 3814 }
1915} 3815}
… …
1918ev_stat_start (EV_P_ ev_stat *w) 3818ev_stat_start (EV_P_ ev_stat *w)
1919{ 3819{
1920 if (expect_false (ev_is_active (w))) 3820 if (expect_false (ev_is_active (w)))
1921 return; 3821 return;
1922 3822
1923 /* since we use memcmp, we need to clear any padding data etc. */
1924 memset (&w->prev, 0, sizeof (ev_statdata));
1925 memset (&w->attr, 0, sizeof (ev_statdata));
1926
1927 ev_stat_stat (EV_A_ w); 3823 ev_stat_stat (EV_A_ w);
1928 3824
3825 if (w->interval < MIN_STAT_INTERVAL && w->interval)
1929 if (w->interval < MIN_STAT_INTERVAL) 3826 w->interval = MIN_STAT_INTERVAL;
1930 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1931 3827
1932 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3828 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
1933 ev_set_priority (&w->timer, ev_priority (w)); 3829 ev_set_priority (&w->timer, ev_priority (w));
1934 3830
1935#if EV_USE_INOTIFY 3831#if EV_USE_INOTIFY
1936 infy_init (EV_A); 3832 infy_init (EV_A);
1937 3833
1938 if (fs_fd >= 0) 3834 if (fs_fd >= 0)
1939 infy_add (EV_A_ w); 3835 infy_add (EV_A_ w);
1940 else 3836 else
1941#endif 3837#endif
3838 {
1942 ev_timer_start (EV_A_ &w->timer); 3839 ev_timer_again (EV_A_ &w->timer);
3840 ev_unref (EV_A);
3841 }
1943 3842
1944 ev_start (EV_A_ (W)w, 1); 3843 ev_start (EV_A_ (W)w, 1);
3844
3845 EV_FREQUENT_CHECK;
1945} 3846}
1946 3847
1947void 3848void
1948ev_stat_stop (EV_P_ ev_stat *w) 3849ev_stat_stop (EV_P_ ev_stat *w)
1949{ 3850{
1950 ev_clear_pending (EV_A_ (W)w); 3851 clear_pending (EV_A_ (W)w);
1951 if (expect_false (!ev_is_active (w))) 3852 if (expect_false (!ev_is_active (w)))
1952 return; 3853 return;
1953 3854
3855 EV_FREQUENT_CHECK;
3856
1954#if EV_USE_INOTIFY 3857#if EV_USE_INOTIFY
1955 infy_del (EV_A_ w); 3858 infy_del (EV_A_ w);
1956#endif 3859#endif
3860
3861 if (ev_is_active (&w->timer))
3862 {
3863 ev_ref (EV_A);
1957 ev_timer_stop (EV_A_ &w->timer); 3864 ev_timer_stop (EV_A_ &w->timer);
3865 }
1958 3866
1959 ev_stop (EV_A_ (W)w); 3867 ev_stop (EV_A_ (W)w);
1960}
1961#endif
1962 3868
3869 EV_FREQUENT_CHECK;
3870}
3871#endif
3872
3873#if EV_IDLE_ENABLE
1963void 3874void
1964ev_idle_start (EV_P_ ev_idle *w) 3875ev_idle_start (EV_P_ ev_idle *w)
1965{ 3876{
1966 if (expect_false (ev_is_active (w))) 3877 if (expect_false (ev_is_active (w)))
1967 return; 3878 return;
1968 3879
3880 pri_adjust (EV_A_ (W)w);
3881
3882 EV_FREQUENT_CHECK;
3883
3884 {
3885 int active = ++idlecnt [ABSPRI (w)];
3886
3887 ++idleall;
1969 ev_start (EV_A_ (W)w, ++idlecnt); 3888 ev_start (EV_A_ (W)w, active);
3889
1970 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 3890 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1971 idles [idlecnt - 1] = w; 3891 idles [ABSPRI (w)][active - 1] = w;
3892 }
3893
3894 EV_FREQUENT_CHECK;
1972} 3895}
1973 3896
1974void 3897void
1975ev_idle_stop (EV_P_ ev_idle *w) 3898ev_idle_stop (EV_P_ ev_idle *w)
1976{ 3899{
1977 ev_clear_pending (EV_A_ (W)w); 3900 clear_pending (EV_A_ (W)w);
1978 if (expect_false (!ev_is_active (w))) 3901 if (expect_false (!ev_is_active (w)))
1979 return; 3902 return;
1980 3903
3904 EV_FREQUENT_CHECK;
3905
1981 { 3906 {
1982 int active = ((W)w)->active; 3907 int active = ev_active (w);
1983 idles [active - 1] = idles [--idlecnt]; 3908
1984 ((W)idles [active - 1])->active = active; 3909 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3910 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3911
3912 ev_stop (EV_A_ (W)w);
3913 --idleall;
1985 } 3914 }
1986 3915
1987 ev_stop (EV_A_ (W)w); 3916 EV_FREQUENT_CHECK;
1988} 3917}
3918#endif
1989 3919
3920#if EV_PREPARE_ENABLE
1990void 3921void
1991ev_prepare_start (EV_P_ ev_prepare *w) 3922ev_prepare_start (EV_P_ ev_prepare *w)
1992{ 3923{
1993 if (expect_false (ev_is_active (w))) 3924 if (expect_false (ev_is_active (w)))
1994 return; 3925 return;
3926
3927 EV_FREQUENT_CHECK;
1995 3928
1996 ev_start (EV_A_ (W)w, ++preparecnt); 3929 ev_start (EV_A_ (W)w, ++preparecnt);
1997 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3930 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1998 prepares [preparecnt - 1] = w; 3931 prepares [preparecnt - 1] = w;
3932
3933 EV_FREQUENT_CHECK;
1999} 3934}
2000 3935
2001void 3936void
2002ev_prepare_stop (EV_P_ ev_prepare *w) 3937ev_prepare_stop (EV_P_ ev_prepare *w)
2003{ 3938{
2004 ev_clear_pending (EV_A_ (W)w); 3939 clear_pending (EV_A_ (W)w);
2005 if (expect_false (!ev_is_active (w))) 3940 if (expect_false (!ev_is_active (w)))
2006 return; 3941 return;
2007 3942
3943 EV_FREQUENT_CHECK;
3944
2008 { 3945 {
2009 int active = ((W)w)->active; 3946 int active = ev_active (w);
3947
2010 prepares [active - 1] = prepares [--preparecnt]; 3948 prepares [active - 1] = prepares [--preparecnt];
2011 ((W)prepares [active - 1])->active = active; 3949 ev_active (prepares [active - 1]) = active;
2012 } 3950 }
2013 3951
2014 ev_stop (EV_A_ (W)w); 3952 ev_stop (EV_A_ (W)w);
2015}
2016 3953
3954 EV_FREQUENT_CHECK;
3955}
3956#endif
3957
3958#if EV_CHECK_ENABLE
2017void 3959void
2018ev_check_start (EV_P_ ev_check *w) 3960ev_check_start (EV_P_ ev_check *w)
2019{ 3961{
2020 if (expect_false (ev_is_active (w))) 3962 if (expect_false (ev_is_active (w)))
2021 return; 3963 return;
3964
3965 EV_FREQUENT_CHECK;
2022 3966
2023 ev_start (EV_A_ (W)w, ++checkcnt); 3967 ev_start (EV_A_ (W)w, ++checkcnt);
2024 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3968 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2025 checks [checkcnt - 1] = w; 3969 checks [checkcnt - 1] = w;
3970
3971 EV_FREQUENT_CHECK;
2026} 3972}
2027 3973
2028void 3974void
2029ev_check_stop (EV_P_ ev_check *w) 3975ev_check_stop (EV_P_ ev_check *w)
2030{ 3976{
2031 ev_clear_pending (EV_A_ (W)w); 3977 clear_pending (EV_A_ (W)w);
2032 if (expect_false (!ev_is_active (w))) 3978 if (expect_false (!ev_is_active (w)))
2033 return; 3979 return;
2034 3980
3981 EV_FREQUENT_CHECK;
3982
2035 { 3983 {
2036 int active = ((W)w)->active; 3984 int active = ev_active (w);
3985
2037 checks [active - 1] = checks [--checkcnt]; 3986 checks [active - 1] = checks [--checkcnt];
2038 ((W)checks [active - 1])->active = active; 3987 ev_active (checks [active - 1]) = active;
2039 } 3988 }
2040 3989
2041 ev_stop (EV_A_ (W)w); 3990 ev_stop (EV_A_ (W)w);
3991
3992 EV_FREQUENT_CHECK;
2042} 3993}
3994#endif
2043 3995
2044#if EV_EMBED_ENABLE 3996#if EV_EMBED_ENABLE
2045void noinline 3997void noinline
2046ev_embed_sweep (EV_P_ ev_embed *w) 3998ev_embed_sweep (EV_P_ ev_embed *w)
2047{ 3999{
2048 ev_loop (w->loop, EVLOOP_NONBLOCK); 4000 ev_run (w->other, EVRUN_NOWAIT);
2049} 4001}
2050 4002
2051static void 4003static void
2052embed_cb (EV_P_ ev_io *io, int revents) 4004embed_io_cb (EV_P_ ev_io *io, int revents)
2053{ 4005{
2054 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4006 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2055 4007
2056 if (ev_cb (w)) 4008 if (ev_cb (w))
2057 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4009 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2058 else 4010 else
2059 ev_embed_sweep (loop, w); 4011 ev_run (w->other, EVRUN_NOWAIT);
2060} 4012}
4013
4014static void
4015embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4016{
4017 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4018
4019 {
4020 EV_P = w->other;
4021
4022 while (fdchangecnt)
4023 {
4024 fd_reify (EV_A);
4025 ev_run (EV_A_ EVRUN_NOWAIT);
4026 }
4027 }
4028}
4029
4030static void
4031embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4032{
4033 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4034
4035 ev_embed_stop (EV_A_ w);
4036
4037 {
4038 EV_P = w->other;
4039
4040 ev_loop_fork (EV_A);
4041 ev_run (EV_A_ EVRUN_NOWAIT);
4042 }
4043
4044 ev_embed_start (EV_A_ w);
4045}
4046
4047#if 0
4048static void
4049embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4050{
4051 ev_idle_stop (EV_A_ idle);
4052}
4053#endif
2061 4054
2062void 4055void
2063ev_embed_start (EV_P_ ev_embed *w) 4056ev_embed_start (EV_P_ ev_embed *w)
2064{ 4057{
2065 if (expect_false (ev_is_active (w))) 4058 if (expect_false (ev_is_active (w)))
2066 return; 4059 return;
2067 4060
2068 { 4061 {
2069 struct ev_loop *loop = w->loop; 4062 EV_P = w->other;
2070 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4063 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2071 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4064 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2072 } 4065 }
4066
4067 EV_FREQUENT_CHECK;
2073 4068
2074 ev_set_priority (&w->io, ev_priority (w)); 4069 ev_set_priority (&w->io, ev_priority (w));
2075 ev_io_start (EV_A_ &w->io); 4070 ev_io_start (EV_A_ &w->io);
2076 4071
4072 ev_prepare_init (&w->prepare, embed_prepare_cb);
4073 ev_set_priority (&w->prepare, EV_MINPRI);
4074 ev_prepare_start (EV_A_ &w->prepare);
4075
4076 ev_fork_init (&w->fork, embed_fork_cb);
4077 ev_fork_start (EV_A_ &w->fork);
4078
4079 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4080
2077 ev_start (EV_A_ (W)w, 1); 4081 ev_start (EV_A_ (W)w, 1);
4082
4083 EV_FREQUENT_CHECK;
2078} 4084}
2079 4085
2080void 4086void
2081ev_embed_stop (EV_P_ ev_embed *w) 4087ev_embed_stop (EV_P_ ev_embed *w)
2082{ 4088{
2083 ev_clear_pending (EV_A_ (W)w); 4089 clear_pending (EV_A_ (W)w);
2084 if (expect_false (!ev_is_active (w))) 4090 if (expect_false (!ev_is_active (w)))
2085 return; 4091 return;
2086 4092
4093 EV_FREQUENT_CHECK;
4094
2087 ev_io_stop (EV_A_ &w->io); 4095 ev_io_stop (EV_A_ &w->io);
4096 ev_prepare_stop (EV_A_ &w->prepare);
4097 ev_fork_stop (EV_A_ &w->fork);
2088 4098
2089 ev_stop (EV_A_ (W)w); 4099 ev_stop (EV_A_ (W)w);
4100
4101 EV_FREQUENT_CHECK;
2090} 4102}
2091#endif 4103#endif
2092 4104
2093#if EV_FORK_ENABLE 4105#if EV_FORK_ENABLE
2094void 4106void
2095ev_fork_start (EV_P_ ev_fork *w) 4107ev_fork_start (EV_P_ ev_fork *w)
2096{ 4108{
2097 if (expect_false (ev_is_active (w))) 4109 if (expect_false (ev_is_active (w)))
2098 return; 4110 return;
2099 4111
4112 EV_FREQUENT_CHECK;
4113
2100 ev_start (EV_A_ (W)w, ++forkcnt); 4114 ev_start (EV_A_ (W)w, ++forkcnt);
2101 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4115 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2102 forks [forkcnt - 1] = w; 4116 forks [forkcnt - 1] = w;
4117
4118 EV_FREQUENT_CHECK;
2103} 4119}
2104 4120
2105void 4121void
2106ev_fork_stop (EV_P_ ev_fork *w) 4122ev_fork_stop (EV_P_ ev_fork *w)
2107{ 4123{
2108 ev_clear_pending (EV_A_ (W)w); 4124 clear_pending (EV_A_ (W)w);
2109 if (expect_false (!ev_is_active (w))) 4125 if (expect_false (!ev_is_active (w)))
2110 return; 4126 return;
2111 4127
4128 EV_FREQUENT_CHECK;
4129
2112 { 4130 {
2113 int active = ((W)w)->active; 4131 int active = ev_active (w);
4132
2114 forks [active - 1] = forks [--forkcnt]; 4133 forks [active - 1] = forks [--forkcnt];
2115 ((W)forks [active - 1])->active = active; 4134 ev_active (forks [active - 1]) = active;
2116 } 4135 }
2117 4136
2118 ev_stop (EV_A_ (W)w); 4137 ev_stop (EV_A_ (W)w);
4138
4139 EV_FREQUENT_CHECK;
4140}
4141#endif
4142
4143#if EV_CLEANUP_ENABLE
4144void
4145ev_cleanup_start (EV_P_ ev_cleanup *w)
4146{
4147 if (expect_false (ev_is_active (w)))
4148 return;
4149
4150 EV_FREQUENT_CHECK;
4151
4152 ev_start (EV_A_ (W)w, ++cleanupcnt);
4153 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4154 cleanups [cleanupcnt - 1] = w;
4155
4156 /* cleanup watchers should never keep a refcount on the loop */
4157 ev_unref (EV_A);
4158 EV_FREQUENT_CHECK;
4159}
4160
4161void
4162ev_cleanup_stop (EV_P_ ev_cleanup *w)
4163{
4164 clear_pending (EV_A_ (W)w);
4165 if (expect_false (!ev_is_active (w)))
4166 return;
4167
4168 EV_FREQUENT_CHECK;
4169 ev_ref (EV_A);
4170
4171 {
4172 int active = ev_active (w);
4173
4174 cleanups [active - 1] = cleanups [--cleanupcnt];
4175 ev_active (cleanups [active - 1]) = active;
4176 }
4177
4178 ev_stop (EV_A_ (W)w);
4179
4180 EV_FREQUENT_CHECK;
4181}
4182#endif
4183
4184#if EV_ASYNC_ENABLE
4185void
4186ev_async_start (EV_P_ ev_async *w)
4187{
4188 if (expect_false (ev_is_active (w)))
4189 return;
4190
4191 w->sent = 0;
4192
4193 evpipe_init (EV_A);
4194
4195 EV_FREQUENT_CHECK;
4196
4197 ev_start (EV_A_ (W)w, ++asynccnt);
4198 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4199 asyncs [asynccnt - 1] = w;
4200
4201 EV_FREQUENT_CHECK;
4202}
4203
4204void
4205ev_async_stop (EV_P_ ev_async *w)
4206{
4207 clear_pending (EV_A_ (W)w);
4208 if (expect_false (!ev_is_active (w)))
4209 return;
4210
4211 EV_FREQUENT_CHECK;
4212
4213 {
4214 int active = ev_active (w);
4215
4216 asyncs [active - 1] = asyncs [--asynccnt];
4217 ev_active (asyncs [active - 1]) = active;
4218 }
4219
4220 ev_stop (EV_A_ (W)w);
4221
4222 EV_FREQUENT_CHECK;
4223}
4224
4225void
4226ev_async_send (EV_P_ ev_async *w)
4227{
4228 w->sent = 1;
4229 evpipe_write (EV_A_ &async_pending);
2119} 4230}
2120#endif 4231#endif
2121 4232
2122/*****************************************************************************/ 4233/*****************************************************************************/
2123 4234
… …
2133once_cb (EV_P_ struct ev_once *once, int revents) 4244once_cb (EV_P_ struct ev_once *once, int revents)
2134{ 4245{
2135 void (*cb)(int revents, void *arg) = once->cb; 4246 void (*cb)(int revents, void *arg) = once->cb;
2136 void *arg = once->arg; 4247 void *arg = once->arg;
2137 4248
2138 ev_io_stop (EV_A_ &once->io); 4249 ev_io_stop (EV_A_ &once->io);
2139 ev_timer_stop (EV_A_ &once->to); 4250 ev_timer_stop (EV_A_ &once->to);
2140 ev_free (once); 4251 ev_free (once);
2141 4252
2142 cb (revents, arg); 4253 cb (revents, arg);
2143} 4254}
2144 4255
2145static void 4256static void
2146once_cb_io (EV_P_ ev_io *w, int revents) 4257once_cb_io (EV_P_ ev_io *w, int revents)
2147{ 4258{
2148 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4259 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4260
4261 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2149} 4262}
2150 4263
2151static void 4264static void
2152once_cb_to (EV_P_ ev_timer *w, int revents) 4265once_cb_to (EV_P_ ev_timer *w, int revents)
2153{ 4266{
2154 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4267 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4268
4269 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2155} 4270}
2156 4271
2157void 4272void
2158ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4273ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2159{ 4274{
2160 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4275 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2161 4276
2162 if (expect_false (!once)) 4277 if (expect_false (!once))
2163 { 4278 {
2164 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4279 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2165 return; 4280 return;
2166 } 4281 }
2167 4282
2168 once->cb = cb; 4283 once->cb = cb;
2169 once->arg = arg; 4284 once->arg = arg;
… …
2181 ev_timer_set (&once->to, timeout, 0.); 4296 ev_timer_set (&once->to, timeout, 0.);
2182 ev_timer_start (EV_A_ &once->to); 4297 ev_timer_start (EV_A_ &once->to);
2183 } 4298 }
2184} 4299}
2185 4300
2186#ifdef __cplusplus 4301/*****************************************************************************/
2187} 4302
4303#if EV_WALK_ENABLE
4304void ecb_cold
4305ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4306{
4307 int i, j;
4308 ev_watcher_list *wl, *wn;
4309
4310 if (types & (EV_IO | EV_EMBED))
4311 for (i = 0; i < anfdmax; ++i)
4312 for (wl = anfds [i].head; wl; )
4313 {
4314 wn = wl->next;
4315
4316#if EV_EMBED_ENABLE
4317 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4318 {
4319 if (types & EV_EMBED)
4320 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4321 }
4322 else
4323#endif
4324#if EV_USE_INOTIFY
4325 if (ev_cb ((ev_io *)wl) == infy_cb)
4326 ;
4327 else
4328#endif
4329 if ((ev_io *)wl != &pipe_w)
4330 if (types & EV_IO)
4331 cb (EV_A_ EV_IO, wl);
4332
4333 wl = wn;
4334 }
4335
4336 if (types & (EV_TIMER | EV_STAT))
4337 for (i = timercnt + HEAP0; i-- > HEAP0; )
4338#if EV_STAT_ENABLE
4339 /*TODO: timer is not always active*/
4340 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4341 {
4342 if (types & EV_STAT)
4343 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4344 }
4345 else
4346#endif
4347 if (types & EV_TIMER)
4348 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4349
4350#if EV_PERIODIC_ENABLE
4351 if (types & EV_PERIODIC)
4352 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4353 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4354#endif
4355
4356#if EV_IDLE_ENABLE
4357 if (types & EV_IDLE)
4358 for (j = NUMPRI; j--; )
4359 for (i = idlecnt [j]; i--; )
4360 cb (EV_A_ EV_IDLE, idles [j][i]);
4361#endif
4362
4363#if EV_FORK_ENABLE
4364 if (types & EV_FORK)
4365 for (i = forkcnt; i--; )
4366 if (ev_cb (forks [i]) != embed_fork_cb)
4367 cb (EV_A_ EV_FORK, forks [i]);
4368#endif
4369
4370#if EV_ASYNC_ENABLE
4371 if (types & EV_ASYNC)
4372 for (i = asynccnt; i--; )
4373 cb (EV_A_ EV_ASYNC, asyncs [i]);
4374#endif
4375
4376#if EV_PREPARE_ENABLE
4377 if (types & EV_PREPARE)
4378 for (i = preparecnt; i--; )
4379# if EV_EMBED_ENABLE
4380 if (ev_cb (prepares [i]) != embed_prepare_cb)
2188#endif 4381# endif
4382 cb (EV_A_ EV_PREPARE, prepares [i]);
4383#endif
2189 4384
4385#if EV_CHECK_ENABLE
4386 if (types & EV_CHECK)
4387 for (i = checkcnt; i--; )
4388 cb (EV_A_ EV_CHECK, checks [i]);
4389#endif
4390
4391#if EV_SIGNAL_ENABLE
4392 if (types & EV_SIGNAL)
4393 for (i = 0; i < EV_NSIG - 1; ++i)
4394 for (wl = signals [i].head; wl; )
4395 {
4396 wn = wl->next;
4397 cb (EV_A_ EV_SIGNAL, wl);
4398 wl = wn;
4399 }
4400#endif
4401
4402#if EV_CHILD_ENABLE
4403 if (types & EV_CHILD)
4404 for (i = (EV_PID_HASHSIZE); i--; )
4405 for (wl = childs [i]; wl; )
4406 {
4407 wn = wl->next;
4408 cb (EV_A_ EV_CHILD, wl);
4409 wl = wn;
4410 }
4411#endif
4412/* EV_STAT 0x00001000 /* stat data changed */
4413/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4414}
4415#endif
4416
4417#if EV_MULTIPLICITY
4418 #include "ev_wrap.h"
4419#endif
4420
4421EV_CPP(})
4422

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