ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.164 by root, Fri Dec 7 16:44:10 2007 UTC vs.
Revision 1.407 by root, Wed Jan 25 01:32:12 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 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
… …
129#ifndef _WIN32 188#ifndef _WIN32
130# include <sys/time.h> 189# include <sys/time.h>
131# include <sys/wait.h> 190# include <sys/wait.h>
132# include <unistd.h> 191# include <unistd.h>
133#else 192#else
193# include <io.h>
134# define WIN32_LEAN_AND_MEAN 194# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 195# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 196# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 197# define EV_SELECT_IS_WINSOCKET 1
138# endif 198# endif
199# undef EV_AVOID_STDIO
200#endif
201
202/* OS X, in its infinite idiocy, actually HARDCODES
203 * a limit of 1024 into their select. Where people have brains,
204 * OS X engineers apparently have a vacuum. Or maybe they were
205 * ordered to have a vacuum, or they do anything for money.
206 * This might help. Or not.
207 */
208#define _DARWIN_UNLIMITED_SELECT 1
209
210/* this block tries to deduce configuration from header-defined symbols and defaults */
211
212/* try to deduce the maximum number of signals on this platform */
213#if defined (EV_NSIG)
214/* use what's provided */
215#elif defined (NSIG)
216# define EV_NSIG (NSIG)
217#elif defined(_NSIG)
218# define EV_NSIG (_NSIG)
219#elif defined (SIGMAX)
220# define EV_NSIG (SIGMAX+1)
221#elif defined (SIG_MAX)
222# define EV_NSIG (SIG_MAX+1)
223#elif defined (_SIG_MAX)
224# define EV_NSIG (_SIG_MAX+1)
225#elif defined (MAXSIG)
226# define EV_NSIG (MAXSIG+1)
227#elif defined (MAX_SIG)
228# define EV_NSIG (MAX_SIG+1)
229#elif defined (SIGARRAYSIZE)
230# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
231#elif defined (_sys_nsig)
232# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
233#else
234# error "unable to find value for NSIG, please report"
235/* to make it compile regardless, just remove the above line, */
236/* but consider reporting it, too! :) */
237# define EV_NSIG 65
238#endif
239
240#ifndef EV_USE_FLOOR
241# define EV_USE_FLOOR 0
242#endif
243
244#ifndef EV_USE_CLOCK_SYSCALL
245# if __linux && __GLIBC__ >= 2
246# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
247# else
248# define EV_USE_CLOCK_SYSCALL 0
139#endif 249# endif
140 250#endif
141/**/
142 251
143#ifndef EV_USE_MONOTONIC 252#ifndef EV_USE_MONOTONIC
253# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
254# define EV_USE_MONOTONIC EV_FEATURE_OS
255# else
144# define EV_USE_MONOTONIC 0 256# define EV_USE_MONOTONIC 0
257# endif
145#endif 258#endif
146 259
147#ifndef EV_USE_REALTIME 260#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 261# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
262#endif
263
264#ifndef EV_USE_NANOSLEEP
265# if _POSIX_C_SOURCE >= 199309L
266# define EV_USE_NANOSLEEP EV_FEATURE_OS
267# else
268# define EV_USE_NANOSLEEP 0
269# endif
149#endif 270#endif
150 271
151#ifndef EV_USE_SELECT 272#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 273# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 274#endif
154 275
155#ifndef EV_USE_POLL 276#ifndef EV_USE_POLL
156# ifdef _WIN32 277# ifdef _WIN32
157# define EV_USE_POLL 0 278# define EV_USE_POLL 0
158# else 279# else
159# define EV_USE_POLL 1 280# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 281# endif
161#endif 282#endif
162 283
163#ifndef EV_USE_EPOLL 284#ifndef EV_USE_EPOLL
285# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
286# define EV_USE_EPOLL EV_FEATURE_BACKENDS
287# else
164# define EV_USE_EPOLL 0 288# define EV_USE_EPOLL 0
289# endif
165#endif 290#endif
166 291
167#ifndef EV_USE_KQUEUE 292#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 293# define EV_USE_KQUEUE 0
169#endif 294#endif
… …
171#ifndef EV_USE_PORT 296#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 297# define EV_USE_PORT 0
173#endif 298#endif
174 299
175#ifndef EV_USE_INOTIFY 300#ifndef EV_USE_INOTIFY
301# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
302# define EV_USE_INOTIFY EV_FEATURE_OS
303# else
176# define EV_USE_INOTIFY 0 304# define EV_USE_INOTIFY 0
305# endif
177#endif 306#endif
178 307
179#ifndef EV_PID_HASHSIZE 308#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 309# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 310#endif
311
312#ifndef EV_INOTIFY_HASHSIZE
313# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
314#endif
315
316#ifndef EV_USE_EVENTFD
317# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
318# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 319# else
183# define EV_PID_HASHSIZE 16 320# define EV_USE_EVENTFD 0
184# endif 321# endif
185#endif 322#endif
186 323
187#ifndef EV_INOTIFY_HASHSIZE 324#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 325# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 326# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 327# else
191# define EV_INOTIFY_HASHSIZE 16 328# define EV_USE_SIGNALFD 0
192# endif 329# endif
193#endif 330#endif
194 331
195/**/ 332#if 0 /* debugging */
333# define EV_VERIFY 3
334# define EV_USE_4HEAP 1
335# define EV_HEAP_CACHE_AT 1
336#endif
337
338#ifndef EV_VERIFY
339# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
340#endif
341
342#ifndef EV_USE_4HEAP
343# define EV_USE_4HEAP EV_FEATURE_DATA
344#endif
345
346#ifndef EV_HEAP_CACHE_AT
347# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
348#endif
349
350/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
351/* which makes programs even slower. might work on other unices, too. */
352#if EV_USE_CLOCK_SYSCALL
353# include <syscall.h>
354# ifdef SYS_clock_gettime
355# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
356# undef EV_USE_MONOTONIC
357# define EV_USE_MONOTONIC 1
358# else
359# undef EV_USE_CLOCK_SYSCALL
360# define EV_USE_CLOCK_SYSCALL 0
361# endif
362#endif
363
364/* this block fixes any misconfiguration where we know we run into trouble otherwise */
365
366#ifdef _AIX
367/* AIX has a completely broken poll.h header */
368# undef EV_USE_POLL
369# define EV_USE_POLL 0
370#endif
196 371
197#ifndef CLOCK_MONOTONIC 372#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 373# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 374# define EV_USE_MONOTONIC 0
200#endif 375#endif
… …
202#ifndef CLOCK_REALTIME 377#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 378# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 379# define EV_USE_REALTIME 0
205#endif 380#endif
206 381
382#if !EV_STAT_ENABLE
383# undef EV_USE_INOTIFY
384# define EV_USE_INOTIFY 0
385#endif
386
387#if !EV_USE_NANOSLEEP
388/* hp-ux has it in sys/time.h, which we unconditionally include above */
389# if !defined(_WIN32) && !defined(__hpux)
390# include <sys/select.h>
391# endif
392#endif
393
394#if EV_USE_INOTIFY
395# include <sys/statfs.h>
396# include <sys/inotify.h>
397/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
398# ifndef IN_DONT_FOLLOW
399# undef EV_USE_INOTIFY
400# define EV_USE_INOTIFY 0
401# endif
402#endif
403
207#if EV_SELECT_IS_WINSOCKET 404#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 405# include <winsock.h>
209#endif 406#endif
210 407
211#if !EV_STAT_ENABLE 408#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 409/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
410# include <stdint.h>
411# ifndef EFD_NONBLOCK
412# define EFD_NONBLOCK O_NONBLOCK
213#endif 413# endif
414# ifndef EFD_CLOEXEC
415# ifdef O_CLOEXEC
416# define EFD_CLOEXEC O_CLOEXEC
417# else
418# define EFD_CLOEXEC 02000000
419# endif
420# endif
421EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
422#endif
214 423
215#if EV_USE_INOTIFY 424#if EV_USE_SIGNALFD
425/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
216# include <sys/inotify.h> 426# include <stdint.h>
427# ifndef SFD_NONBLOCK
428# define SFD_NONBLOCK O_NONBLOCK
429# endif
430# ifndef SFD_CLOEXEC
431# ifdef O_CLOEXEC
432# define SFD_CLOEXEC O_CLOEXEC
433# else
434# define SFD_CLOEXEC 02000000
435# endif
436# endif
437EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
438
439struct signalfd_siginfo
440{
441 uint32_t ssi_signo;
442 char pad[128 - sizeof (uint32_t)];
443};
217#endif 444#endif
218 445
219/**/ 446/**/
447
448#if EV_VERIFY >= 3
449# define EV_FREQUENT_CHECK ev_verify (EV_A)
450#else
451# define EV_FREQUENT_CHECK do { } while (0)
452#endif
453
454/*
455 * This is used to work around floating point rounding problems.
456 * This value is good at least till the year 4000.
457 */
458#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
459/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
220 460
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 461#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) */ 462#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 */
224 463
464#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
465#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
466
467/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
468/* ECB.H BEGIN */
469/*
470 * libecb - http://software.schmorp.de/pkg/libecb
471 *
472 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
473 * Copyright (©) 2011 Emanuele Giaquinta
474 * All rights reserved.
475 *
476 * Redistribution and use in source and binary forms, with or without modifica-
477 * tion, are permitted provided that the following conditions are met:
478 *
479 * 1. Redistributions of source code must retain the above copyright notice,
480 * this list of conditions and the following disclaimer.
481 *
482 * 2. Redistributions in binary form must reproduce the above copyright
483 * notice, this list of conditions and the following disclaimer in the
484 * documentation and/or other materials provided with the distribution.
485 *
486 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
487 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
488 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
489 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
490 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
491 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
492 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
493 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
494 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
495 * OF THE POSSIBILITY OF SUCH DAMAGE.
496 */
497
498#ifndef ECB_H
499#define ECB_H
500
501#ifdef _WIN32
502 typedef signed char int8_t;
503 typedef unsigned char uint8_t;
504 typedef signed short int16_t;
505 typedef unsigned short uint16_t;
506 typedef signed int int32_t;
507 typedef unsigned int uint32_t;
225#if __GNUC__ >= 3 508 #if __GNUC__
226# define expect(expr,value) __builtin_expect ((expr),(value)) 509 typedef signed long long int64_t;
227# define inline_size static inline /* inline for codesize */ 510 typedef unsigned long long uint64_t;
228# if EV_MINIMAL 511 #else /* _MSC_VER || __BORLANDC__ */
229# define noinline __attribute__ ((noinline)) 512 typedef signed __int64 int64_t;
230# define inline_speed static noinline 513 typedef unsigned __int64 uint64_t;
231# else
232# define noinline
233# define inline_speed static inline
234# endif 514 #endif
235#else 515#else
516 #include <inttypes.h>
517#endif
518
519/* many compilers define _GNUC_ to some versions but then only implement
520 * what their idiot authors think are the "more important" extensions,
521 * causing enormous grief in return for some better fake benchmark numbers.
522 * or so.
523 * we try to detect these and simply assume they are not gcc - if they have
524 * an issue with that they should have done it right in the first place.
525 */
526#ifndef ECB_GCC_VERSION
527 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
528 #define ECB_GCC_VERSION(major,minor) 0
529 #else
530 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
531 #endif
532#endif
533
534/*****************************************************************************/
535
536/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
537/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
538
539#if ECB_NO_THREADS || ECB_NO_SMP
540 #define ECB_MEMORY_FENCE do { } while (0)
541#endif
542
543#ifndef ECB_MEMORY_FENCE
544 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || defined(__clang__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
545 #if __i386 || __i386__
546 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
547 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
548 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
549 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
550 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
551 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
552 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
553 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
554 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
555 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
556 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
557 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
558 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
559 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
560 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
561 #elif __sparc || __sparc__
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
563 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
564 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
565 #endif
566 #endif
567#endif
568
569#ifndef ECB_MEMORY_FENCE
570 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
571 #define ECB_MEMORY_FENCE __sync_synchronize ()
572 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
573 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
574 #elif _MSC_VER >= 1400 /* VC++ 2005 */
575 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
576 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
577 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
578 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
579 #elif defined(_WIN32)
580 #include <WinNT.h>
581 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
582 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
583 #include <mbarrier.h>
584 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
585 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
586 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
587 #endif
588#endif
589
590#ifndef ECB_MEMORY_FENCE
591 #if !ECB_AVOID_PTHREADS
592 /*
593 * if you get undefined symbol references to pthread_mutex_lock,
594 * or failure to find pthread.h, then you should implement
595 * the ECB_MEMORY_FENCE operations for your cpu/compiler
596 * OR provide pthread.h and link against the posix thread library
597 * of your system.
598 */
599 #include <pthread.h>
600 #define ECB_NEEDS_PTHREADS 1
601 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
602
603 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
604 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
605 #endif
606#endif
607
608#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
609 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
610#endif
611
612#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
613 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
614#endif
615
616/*****************************************************************************/
617
618#define ECB_C99 (__STDC_VERSION__ >= 199901L)
619
620#if __cplusplus
621 #define ecb_inline static inline
622#elif ECB_GCC_VERSION(2,5)
623 #define ecb_inline static __inline__
624#elif ECB_C99
625 #define ecb_inline static inline
626#else
627 #define ecb_inline static
628#endif
629
630#if ECB_GCC_VERSION(3,3)
631 #define ecb_restrict __restrict__
632#elif ECB_C99
633 #define ecb_restrict restrict
634#else
635 #define ecb_restrict
636#endif
637
638typedef int ecb_bool;
639
640#define ECB_CONCAT_(a, b) a ## b
641#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
642#define ECB_STRINGIFY_(a) # a
643#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
644
645#define ecb_function_ ecb_inline
646
647#if ECB_GCC_VERSION(3,1)
648 #define ecb_attribute(attrlist) __attribute__(attrlist)
649 #define ecb_is_constant(expr) __builtin_constant_p (expr)
650 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
651 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
652#else
653 #define ecb_attribute(attrlist)
654 #define ecb_is_constant(expr) 0
236# define expect(expr,value) (expr) 655 #define ecb_expect(expr,value) (expr)
237# define inline_speed static 656 #define ecb_prefetch(addr,rw,locality)
238# define inline_size static
239# define noinline
240#endif 657#endif
241 658
659/* no emulation for ecb_decltype */
660#if ECB_GCC_VERSION(4,5)
661 #define ecb_decltype(x) __decltype(x)
662#elif ECB_GCC_VERSION(3,0)
663 #define ecb_decltype(x) __typeof(x)
664#endif
665
666#define ecb_noinline ecb_attribute ((__noinline__))
667#define ecb_noreturn ecb_attribute ((__noreturn__))
668#define ecb_unused ecb_attribute ((__unused__))
669#define ecb_const ecb_attribute ((__const__))
670#define ecb_pure ecb_attribute ((__pure__))
671
672#if ECB_GCC_VERSION(4,3)
673 #define ecb_artificial ecb_attribute ((__artificial__))
674 #define ecb_hot ecb_attribute ((__hot__))
675 #define ecb_cold ecb_attribute ((__cold__))
676#else
677 #define ecb_artificial
678 #define ecb_hot
679 #define ecb_cold
680#endif
681
682/* put around conditional expressions if you are very sure that the */
683/* expression is mostly true or mostly false. note that these return */
684/* booleans, not the expression. */
242#define expect_false(expr) expect ((expr) != 0, 0) 685#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
243#define expect_true(expr) expect ((expr) != 0, 1) 686#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
687/* for compatibility to the rest of the world */
688#define ecb_likely(expr) ecb_expect_true (expr)
689#define ecb_unlikely(expr) ecb_expect_false (expr)
244 690
691/* count trailing zero bits and count # of one bits */
692#if ECB_GCC_VERSION(3,4)
693 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
694 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
695 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
696 #define ecb_ctz32(x) __builtin_ctz (x)
697 #define ecb_ctz64(x) __builtin_ctzll (x)
698 #define ecb_popcount32(x) __builtin_popcount (x)
699 /* no popcountll */
700#else
701 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
702 ecb_function_ int
703 ecb_ctz32 (uint32_t x)
704 {
705 int r = 0;
706
707 x &= ~x + 1; /* this isolates the lowest bit */
708
709#if ECB_branchless_on_i386
710 r += !!(x & 0xaaaaaaaa) << 0;
711 r += !!(x & 0xcccccccc) << 1;
712 r += !!(x & 0xf0f0f0f0) << 2;
713 r += !!(x & 0xff00ff00) << 3;
714 r += !!(x & 0xffff0000) << 4;
715#else
716 if (x & 0xaaaaaaaa) r += 1;
717 if (x & 0xcccccccc) r += 2;
718 if (x & 0xf0f0f0f0) r += 4;
719 if (x & 0xff00ff00) r += 8;
720 if (x & 0xffff0000) r += 16;
721#endif
722
723 return r;
724 }
725
726 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
727 ecb_function_ int
728 ecb_ctz64 (uint64_t x)
729 {
730 int shift = x & 0xffffffffU ? 0 : 32;
731 return ecb_ctz32 (x >> shift) + shift;
732 }
733
734 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
735 ecb_function_ int
736 ecb_popcount32 (uint32_t x)
737 {
738 x -= (x >> 1) & 0x55555555;
739 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
740 x = ((x >> 4) + x) & 0x0f0f0f0f;
741 x *= 0x01010101;
742
743 return x >> 24;
744 }
745
746 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
747 ecb_function_ int ecb_ld32 (uint32_t x)
748 {
749 int r = 0;
750
751 if (x >> 16) { x >>= 16; r += 16; }
752 if (x >> 8) { x >>= 8; r += 8; }
753 if (x >> 4) { x >>= 4; r += 4; }
754 if (x >> 2) { x >>= 2; r += 2; }
755 if (x >> 1) { r += 1; }
756
757 return r;
758 }
759
760 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
761 ecb_function_ int ecb_ld64 (uint64_t x)
762 {
763 int r = 0;
764
765 if (x >> 32) { x >>= 32; r += 32; }
766
767 return r + ecb_ld32 (x);
768 }
769#endif
770
771ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
772ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
773{
774 return ( (x * 0x0802U & 0x22110U)
775 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
776}
777
778ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
779ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
780{
781 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
782 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
783 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
784 x = ( x >> 8 ) | ( x << 8);
785
786 return x;
787}
788
789ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
790ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
791{
792 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
793 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
794 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
795 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
796 x = ( x >> 16 ) | ( x << 16);
797
798 return x;
799}
800
801/* popcount64 is only available on 64 bit cpus as gcc builtin */
802/* so for this version we are lazy */
803ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
804ecb_function_ int
805ecb_popcount64 (uint64_t x)
806{
807 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
808}
809
810ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
811ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
812ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
813ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
814ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
815ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
816ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
817ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
818
819ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
820ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
821ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
822ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
823ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
824ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
825ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
826ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
827
828#if ECB_GCC_VERSION(4,3)
829 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
830 #define ecb_bswap32(x) __builtin_bswap32 (x)
831 #define ecb_bswap64(x) __builtin_bswap64 (x)
832#else
833 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
834 ecb_function_ uint16_t
835 ecb_bswap16 (uint16_t x)
836 {
837 return ecb_rotl16 (x, 8);
838 }
839
840 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
841 ecb_function_ uint32_t
842 ecb_bswap32 (uint32_t x)
843 {
844 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
845 }
846
847 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
848 ecb_function_ uint64_t
849 ecb_bswap64 (uint64_t x)
850 {
851 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
852 }
853#endif
854
855#if ECB_GCC_VERSION(4,5)
856 #define ecb_unreachable() __builtin_unreachable ()
857#else
858 /* this seems to work fine, but gcc always emits a warning for it :/ */
859 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
860 ecb_function_ void ecb_unreachable (void) { }
861#endif
862
863/* try to tell the compiler that some condition is definitely true */
864#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
865
866ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
867ecb_function_ unsigned char
868ecb_byteorder_helper (void)
869{
870 const uint32_t u = 0x11223344;
871 return *(unsigned char *)&u;
872}
873
874ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
875ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
876ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
877ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
878
879#if ECB_GCC_VERSION(3,0) || ECB_C99
880 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
881#else
882 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
883#endif
884
885#if __cplusplus
886 template<typename T>
887 static inline T ecb_div_rd (T val, T div)
888 {
889 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
890 }
891 template<typename T>
892 static inline T ecb_div_ru (T val, T div)
893 {
894 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
895 }
896#else
897 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
898 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
899#endif
900
901#if ecb_cplusplus_does_not_suck
902 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
903 template<typename T, int N>
904 static inline int ecb_array_length (const T (&arr)[N])
905 {
906 return N;
907 }
908#else
909 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
910#endif
911
912#endif
913
914/* ECB.H END */
915
916#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
917/* if your architecture doesn't need memory fences, e.g. because it is
918 * single-cpu/core, or if you use libev in a project that doesn't use libev
919 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
920 * libev, in which cases the memory fences become nops.
921 * alternatively, you can remove this #error and link against libpthread,
922 * which will then provide the memory fences.
923 */
924# error "memory fences not defined for your architecture, please report"
925#endif
926
927#ifndef ECB_MEMORY_FENCE
928# define ECB_MEMORY_FENCE do { } while (0)
929# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
930# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
931#endif
932
933#define expect_false(cond) ecb_expect_false (cond)
934#define expect_true(cond) ecb_expect_true (cond)
935#define noinline ecb_noinline
936
937#define inline_size ecb_inline
938
939#if EV_FEATURE_CODE
940# define inline_speed ecb_inline
941#else
942# define inline_speed static noinline
943#endif
944
245#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 945#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
946
947#if EV_MINPRI == EV_MAXPRI
948# define ABSPRI(w) (((W)w), 0)
949#else
246#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 950# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
951#endif
247 952
248#define EMPTY /* required for microsofts broken pseudo-c compiler */ 953#define EMPTY /* required for microsofts broken pseudo-c compiler */
249#define EMPTY2(a,b) /* used to suppress some warnings */ 954#define EMPTY2(a,b) /* used to suppress some warnings */
250 955
251typedef ev_watcher *W; 956typedef ev_watcher *W;
252typedef ev_watcher_list *WL; 957typedef ev_watcher_list *WL;
253typedef ev_watcher_time *WT; 958typedef ev_watcher_time *WT;
254 959
960#define ev_active(w) ((W)(w))->active
961#define ev_at(w) ((WT)(w))->at
962
963#if EV_USE_REALTIME
964/* sig_atomic_t is used to avoid per-thread variables or locking but still */
965/* giving it a reasonably high chance of working on typical architectures */
966static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
967#endif
968
969#if EV_USE_MONOTONIC
255static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 970static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
971#endif
972
973#ifndef EV_FD_TO_WIN32_HANDLE
974# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
975#endif
976#ifndef EV_WIN32_HANDLE_TO_FD
977# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
978#endif
979#ifndef EV_WIN32_CLOSE_FD
980# define EV_WIN32_CLOSE_FD(fd) close (fd)
981#endif
256 982
257#ifdef _WIN32 983#ifdef _WIN32
258# include "ev_win32.c" 984# include "ev_win32.c"
259#endif 985#endif
260 986
261/*****************************************************************************/ 987/*****************************************************************************/
262 988
989/* define a suitable floor function (only used by periodics atm) */
990
991#if EV_USE_FLOOR
992# include <math.h>
993# define ev_floor(v) floor (v)
994#else
995
996#include <float.h>
997
998/* a floor() replacement function, should be independent of ev_tstamp type */
999static ev_tstamp noinline
1000ev_floor (ev_tstamp v)
1001{
1002 /* the choice of shift factor is not terribly important */
1003#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1004 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1005#else
1006 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1007#endif
1008
1009 /* argument too large for an unsigned long? */
1010 if (expect_false (v >= shift))
1011 {
1012 ev_tstamp f;
1013
1014 if (v == v - 1.)
1015 return v; /* very large number */
1016
1017 f = shift * ev_floor (v * (1. / shift));
1018 return f + ev_floor (v - f);
1019 }
1020
1021 /* special treatment for negative args? */
1022 if (expect_false (v < 0.))
1023 {
1024 ev_tstamp f = -ev_floor (-v);
1025
1026 return f - (f == v ? 0 : 1);
1027 }
1028
1029 /* fits into an unsigned long */
1030 return (unsigned long)v;
1031}
1032
1033#endif
1034
1035/*****************************************************************************/
1036
1037#ifdef __linux
1038# include <sys/utsname.h>
1039#endif
1040
1041static unsigned int noinline ecb_cold
1042ev_linux_version (void)
1043{
1044#ifdef __linux
1045 unsigned int v = 0;
1046 struct utsname buf;
1047 int i;
1048 char *p = buf.release;
1049
1050 if (uname (&buf))
1051 return 0;
1052
1053 for (i = 3+1; --i; )
1054 {
1055 unsigned int c = 0;
1056
1057 for (;;)
1058 {
1059 if (*p >= '0' && *p <= '9')
1060 c = c * 10 + *p++ - '0';
1061 else
1062 {
1063 p += *p == '.';
1064 break;
1065 }
1066 }
1067
1068 v = (v << 8) | c;
1069 }
1070
1071 return v;
1072#else
1073 return 0;
1074#endif
1075}
1076
1077/*****************************************************************************/
1078
1079#if EV_AVOID_STDIO
1080static void noinline ecb_cold
1081ev_printerr (const char *msg)
1082{
1083 write (STDERR_FILENO, msg, strlen (msg));
1084}
1085#endif
1086
263static void (*syserr_cb)(const char *msg); 1087static void (*syserr_cb)(const char *msg);
264 1088
265void 1089void ecb_cold
266ev_set_syserr_cb (void (*cb)(const char *msg)) 1090ev_set_syserr_cb (void (*cb)(const char *msg))
267{ 1091{
268 syserr_cb = cb; 1092 syserr_cb = cb;
269} 1093}
270 1094
271static void noinline 1095static void noinline ecb_cold
272syserr (const char *msg) 1096ev_syserr (const char *msg)
273{ 1097{
274 if (!msg) 1098 if (!msg)
275 msg = "(libev) system error"; 1099 msg = "(libev) system error";
276 1100
277 if (syserr_cb) 1101 if (syserr_cb)
278 syserr_cb (msg); 1102 syserr_cb (msg);
279 else 1103 else
280 { 1104 {
1105#if EV_AVOID_STDIO
1106 ev_printerr (msg);
1107 ev_printerr (": ");
1108 ev_printerr (strerror (errno));
1109 ev_printerr ("\n");
1110#else
281 perror (msg); 1111 perror (msg);
1112#endif
282 abort (); 1113 abort ();
283 } 1114 }
284} 1115}
285 1116
1117static void *
1118ev_realloc_emul (void *ptr, long size)
1119{
1120#if __GLIBC__
1121 return realloc (ptr, size);
1122#else
1123 /* some systems, notably openbsd and darwin, fail to properly
1124 * implement realloc (x, 0) (as required by both ansi c-89 and
1125 * the single unix specification, so work around them here.
1126 */
1127
1128 if (size)
1129 return realloc (ptr, size);
1130
1131 free (ptr);
1132 return 0;
1133#endif
1134}
1135
286static void *(*alloc)(void *ptr, long size); 1136static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
287 1137
288void 1138void ecb_cold
289ev_set_allocator (void *(*cb)(void *ptr, long size)) 1139ev_set_allocator (void *(*cb)(void *ptr, long size))
290{ 1140{
291 alloc = cb; 1141 alloc = cb;
292} 1142}
293 1143
294inline_speed void * 1144inline_speed void *
295ev_realloc (void *ptr, long size) 1145ev_realloc (void *ptr, long size)
296{ 1146{
297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1147 ptr = alloc (ptr, size);
298 1148
299 if (!ptr && size) 1149 if (!ptr && size)
300 { 1150 {
1151#if EV_AVOID_STDIO
1152 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1153#else
301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1154 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1155#endif
302 abort (); 1156 abort ();
303 } 1157 }
304 1158
305 return ptr; 1159 return ptr;
306} 1160}
… …
308#define ev_malloc(size) ev_realloc (0, (size)) 1162#define ev_malloc(size) ev_realloc (0, (size))
309#define ev_free(ptr) ev_realloc ((ptr), 0) 1163#define ev_free(ptr) ev_realloc ((ptr), 0)
310 1164
311/*****************************************************************************/ 1165/*****************************************************************************/
312 1166
1167/* set in reify when reification needed */
1168#define EV_ANFD_REIFY 1
1169
1170/* file descriptor info structure */
313typedef struct 1171typedef struct
314{ 1172{
315 WL head; 1173 WL head;
316 unsigned char events; 1174 unsigned char events; /* the events watched for */
1175 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1176 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
317 unsigned char reify; 1177 unsigned char unused;
1178#if EV_USE_EPOLL
1179 unsigned int egen; /* generation counter to counter epoll bugs */
1180#endif
318#if EV_SELECT_IS_WINSOCKET 1181#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
319 SOCKET handle; 1182 SOCKET handle;
320#endif 1183#endif
1184#if EV_USE_IOCP
1185 OVERLAPPED or, ow;
1186#endif
321} ANFD; 1187} ANFD;
322 1188
1189/* stores the pending event set for a given watcher */
323typedef struct 1190typedef struct
324{ 1191{
325 W w; 1192 W w;
326 int events; 1193 int events; /* the pending event set for the given watcher */
327} ANPENDING; 1194} ANPENDING;
328 1195
329#if EV_USE_INOTIFY 1196#if EV_USE_INOTIFY
1197/* hash table entry per inotify-id */
330typedef struct 1198typedef struct
331{ 1199{
332 WL head; 1200 WL head;
333} ANFS; 1201} ANFS;
1202#endif
1203
1204/* Heap Entry */
1205#if EV_HEAP_CACHE_AT
1206 /* a heap element */
1207 typedef struct {
1208 ev_tstamp at;
1209 WT w;
1210 } ANHE;
1211
1212 #define ANHE_w(he) (he).w /* access watcher, read-write */
1213 #define ANHE_at(he) (he).at /* access cached at, read-only */
1214 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1215#else
1216 /* a heap element */
1217 typedef WT ANHE;
1218
1219 #define ANHE_w(he) (he)
1220 #define ANHE_at(he) (he)->at
1221 #define ANHE_at_cache(he)
334#endif 1222#endif
335 1223
336#if EV_MULTIPLICITY 1224#if EV_MULTIPLICITY
337 1225
338 struct ev_loop 1226 struct ev_loop
… …
344 #undef VAR 1232 #undef VAR
345 }; 1233 };
346 #include "ev_wrap.h" 1234 #include "ev_wrap.h"
347 1235
348 static struct ev_loop default_loop_struct; 1236 static struct ev_loop default_loop_struct;
349 struct ev_loop *ev_default_loop_ptr; 1237 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
350 1238
351#else 1239#else
352 1240
353 ev_tstamp ev_rt_now; 1241 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
354 #define VAR(name,decl) static decl; 1242 #define VAR(name,decl) static decl;
355 #include "ev_vars.h" 1243 #include "ev_vars.h"
356 #undef VAR 1244 #undef VAR
357 1245
358 static int ev_default_loop_ptr; 1246 static int ev_default_loop_ptr;
359 1247
360#endif 1248#endif
361 1249
1250#if EV_FEATURE_API
1251# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1252# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1253# define EV_INVOKE_PENDING invoke_cb (EV_A)
1254#else
1255# define EV_RELEASE_CB (void)0
1256# define EV_ACQUIRE_CB (void)0
1257# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1258#endif
1259
1260#define EVBREAK_RECURSE 0x80
1261
362/*****************************************************************************/ 1262/*****************************************************************************/
363 1263
1264#ifndef EV_HAVE_EV_TIME
364ev_tstamp 1265ev_tstamp
365ev_time (void) 1266ev_time (void)
366{ 1267{
367#if EV_USE_REALTIME 1268#if EV_USE_REALTIME
1269 if (expect_true (have_realtime))
1270 {
368 struct timespec ts; 1271 struct timespec ts;
369 clock_gettime (CLOCK_REALTIME, &ts); 1272 clock_gettime (CLOCK_REALTIME, &ts);
370 return ts.tv_sec + ts.tv_nsec * 1e-9; 1273 return ts.tv_sec + ts.tv_nsec * 1e-9;
371#else 1274 }
1275#endif
1276
372 struct timeval tv; 1277 struct timeval tv;
373 gettimeofday (&tv, 0); 1278 gettimeofday (&tv, 0);
374 return tv.tv_sec + tv.tv_usec * 1e-6; 1279 return tv.tv_sec + tv.tv_usec * 1e-6;
375#endif
376} 1280}
1281#endif
377 1282
378ev_tstamp inline_size 1283inline_size ev_tstamp
379get_clock (void) 1284get_clock (void)
380{ 1285{
381#if EV_USE_MONOTONIC 1286#if EV_USE_MONOTONIC
382 if (expect_true (have_monotonic)) 1287 if (expect_true (have_monotonic))
383 { 1288 {
… …
396{ 1301{
397 return ev_rt_now; 1302 return ev_rt_now;
398} 1303}
399#endif 1304#endif
400 1305
401int inline_size 1306void
1307ev_sleep (ev_tstamp delay)
1308{
1309 if (delay > 0.)
1310 {
1311#if EV_USE_NANOSLEEP
1312 struct timespec ts;
1313
1314 EV_TS_SET (ts, delay);
1315 nanosleep (&ts, 0);
1316#elif defined(_WIN32)
1317 Sleep ((unsigned long)(delay * 1e3));
1318#else
1319 struct timeval tv;
1320
1321 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1322 /* something not guaranteed by newer posix versions, but guaranteed */
1323 /* by older ones */
1324 EV_TV_SET (tv, delay);
1325 select (0, 0, 0, 0, &tv);
1326#endif
1327 }
1328}
1329
1330/*****************************************************************************/
1331
1332#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1333
1334/* find a suitable new size for the given array, */
1335/* hopefully by rounding to a nice-to-malloc size */
1336inline_size int
402array_nextsize (int elem, int cur, int cnt) 1337array_nextsize (int elem, int cur, int cnt)
403{ 1338{
404 int ncur = cur + 1; 1339 int ncur = cur + 1;
405 1340
406 do 1341 do
407 ncur <<= 1; 1342 ncur <<= 1;
408 while (cnt > ncur); 1343 while (cnt > ncur);
409 1344
410 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1345 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
411 if (elem * ncur > 4096) 1346 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
412 { 1347 {
413 ncur *= elem; 1348 ncur *= elem;
414 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1349 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
415 ncur = ncur - sizeof (void *) * 4; 1350 ncur = ncur - sizeof (void *) * 4;
416 ncur /= elem; 1351 ncur /= elem;
417 } 1352 }
418 1353
419 return ncur; 1354 return ncur;
420} 1355}
421 1356
422inline_speed void * 1357static void * noinline ecb_cold
423array_realloc (int elem, void *base, int *cur, int cnt) 1358array_realloc (int elem, void *base, int *cur, int cnt)
424{ 1359{
425 *cur = array_nextsize (elem, *cur, cnt); 1360 *cur = array_nextsize (elem, *cur, cnt);
426 return ev_realloc (base, elem * *cur); 1361 return ev_realloc (base, elem * *cur);
427} 1362}
1363
1364#define array_init_zero(base,count) \
1365 memset ((void *)(base), 0, sizeof (*(base)) * (count))
428 1366
429#define array_needsize(type,base,cur,cnt,init) \ 1367#define array_needsize(type,base,cur,cnt,init) \
430 if (expect_false ((cnt) > (cur))) \ 1368 if (expect_false ((cnt) > (cur))) \
431 { \ 1369 { \
432 int ocur_ = (cur); \ 1370 int ecb_unused ocur_ = (cur); \
433 (base) = (type *)array_realloc \ 1371 (base) = (type *)array_realloc \
434 (sizeof (type), (base), &(cur), (cnt)); \ 1372 (sizeof (type), (base), &(cur), (cnt)); \
435 init ((base) + (ocur_), (cur) - ocur_); \ 1373 init ((base) + (ocur_), (cur) - ocur_); \
436 } 1374 }
437 1375
… …
444 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1382 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
445 } 1383 }
446#endif 1384#endif
447 1385
448#define array_free(stem, idx) \ 1386#define array_free(stem, idx) \
449 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1387 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
450 1388
451/*****************************************************************************/ 1389/*****************************************************************************/
1390
1391/* dummy callback for pending events */
1392static void noinline
1393pendingcb (EV_P_ ev_prepare *w, int revents)
1394{
1395}
452 1396
453void noinline 1397void noinline
454ev_feed_event (EV_P_ void *w, int revents) 1398ev_feed_event (EV_P_ void *w, int revents)
455{ 1399{
456 W w_ = (W)w; 1400 W w_ = (W)w;
1401 int pri = ABSPRI (w_);
457 1402
458 if (expect_false (w_->pending)) 1403 if (expect_false (w_->pending))
1404 pendings [pri][w_->pending - 1].events |= revents;
1405 else
459 { 1406 {
1407 w_->pending = ++pendingcnt [pri];
1408 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1409 pendings [pri][w_->pending - 1].w = w_;
460 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1410 pendings [pri][w_->pending - 1].events = revents;
461 return;
462 } 1411 }
463
464 w_->pending = ++pendingcnt [ABSPRI (w_)];
465 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
466 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
467 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
468} 1412}
469 1413
470void inline_size 1414inline_speed void
1415feed_reverse (EV_P_ W w)
1416{
1417 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1418 rfeeds [rfeedcnt++] = w;
1419}
1420
1421inline_size void
1422feed_reverse_done (EV_P_ int revents)
1423{
1424 do
1425 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1426 while (rfeedcnt);
1427}
1428
1429inline_speed void
471queue_events (EV_P_ W *events, int eventcnt, int type) 1430queue_events (EV_P_ W *events, int eventcnt, int type)
472{ 1431{
473 int i; 1432 int i;
474 1433
475 for (i = 0; i < eventcnt; ++i) 1434 for (i = 0; i < eventcnt; ++i)
476 ev_feed_event (EV_A_ events [i], type); 1435 ev_feed_event (EV_A_ events [i], type);
477} 1436}
478 1437
479/*****************************************************************************/ 1438/*****************************************************************************/
480 1439
481void inline_size 1440inline_speed void
482anfds_init (ANFD *base, int count)
483{
484 while (count--)
485 {
486 base->head = 0;
487 base->events = EV_NONE;
488 base->reify = 0;
489
490 ++base;
491 }
492}
493
494void inline_speed
495fd_event (EV_P_ int fd, int revents) 1441fd_event_nocheck (EV_P_ int fd, int revents)
496{ 1442{
497 ANFD *anfd = anfds + fd; 1443 ANFD *anfd = anfds + fd;
498 ev_io *w; 1444 ev_io *w;
499 1445
500 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1446 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
504 if (ev) 1450 if (ev)
505 ev_feed_event (EV_A_ (W)w, ev); 1451 ev_feed_event (EV_A_ (W)w, ev);
506 } 1452 }
507} 1453}
508 1454
1455/* do not submit kernel events for fds that have reify set */
1456/* because that means they changed while we were polling for new events */
1457inline_speed void
1458fd_event (EV_P_ int fd, int revents)
1459{
1460 ANFD *anfd = anfds + fd;
1461
1462 if (expect_true (!anfd->reify))
1463 fd_event_nocheck (EV_A_ fd, revents);
1464}
1465
509void 1466void
510ev_feed_fd_event (EV_P_ int fd, int revents) 1467ev_feed_fd_event (EV_P_ int fd, int revents)
511{ 1468{
1469 if (fd >= 0 && fd < anfdmax)
512 fd_event (EV_A_ fd, revents); 1470 fd_event_nocheck (EV_A_ fd, revents);
513} 1471}
514 1472
515void inline_size 1473/* make sure the external fd watch events are in-sync */
1474/* with the kernel/libev internal state */
1475inline_size void
516fd_reify (EV_P) 1476fd_reify (EV_P)
517{ 1477{
518 int i; 1478 int i;
1479
1480#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1481 for (i = 0; i < fdchangecnt; ++i)
1482 {
1483 int fd = fdchanges [i];
1484 ANFD *anfd = anfds + fd;
1485
1486 if (anfd->reify & EV__IOFDSET && anfd->head)
1487 {
1488 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1489
1490 if (handle != anfd->handle)
1491 {
1492 unsigned long arg;
1493
1494 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1495
1496 /* handle changed, but fd didn't - we need to do it in two steps */
1497 backend_modify (EV_A_ fd, anfd->events, 0);
1498 anfd->events = 0;
1499 anfd->handle = handle;
1500 }
1501 }
1502 }
1503#endif
519 1504
520 for (i = 0; i < fdchangecnt; ++i) 1505 for (i = 0; i < fdchangecnt; ++i)
521 { 1506 {
522 int fd = fdchanges [i]; 1507 int fd = fdchanges [i];
523 ANFD *anfd = anfds + fd; 1508 ANFD *anfd = anfds + fd;
524 ev_io *w; 1509 ev_io *w;
525 1510
526 int events = 0; 1511 unsigned char o_events = anfd->events;
1512 unsigned char o_reify = anfd->reify;
527 1513
528 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1514 anfd->reify = 0;
529 events |= w->events;
530 1515
531#if EV_SELECT_IS_WINSOCKET 1516 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
532 if (events)
533 { 1517 {
534 unsigned long argp; 1518 anfd->events = 0;
535 anfd->handle = _get_osfhandle (fd); 1519
536 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1520 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1521 anfd->events |= (unsigned char)w->events;
1522
1523 if (o_events != anfd->events)
1524 o_reify = EV__IOFDSET; /* actually |= */
537 } 1525 }
538#endif
539 1526
540 anfd->reify = 0; 1527 if (o_reify & EV__IOFDSET)
541
542 backend_modify (EV_A_ fd, anfd->events, events); 1528 backend_modify (EV_A_ fd, o_events, anfd->events);
543 anfd->events = events;
544 } 1529 }
545 1530
546 fdchangecnt = 0; 1531 fdchangecnt = 0;
547} 1532}
548 1533
549void inline_size 1534/* something about the given fd changed */
1535inline_size void
550fd_change (EV_P_ int fd) 1536fd_change (EV_P_ int fd, int flags)
551{ 1537{
552 if (expect_false (anfds [fd].reify)) 1538 unsigned char reify = anfds [fd].reify;
553 return;
554
555 anfds [fd].reify = 1; 1539 anfds [fd].reify |= flags;
556 1540
1541 if (expect_true (!reify))
1542 {
557 ++fdchangecnt; 1543 ++fdchangecnt;
558 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1544 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
559 fdchanges [fdchangecnt - 1] = fd; 1545 fdchanges [fdchangecnt - 1] = fd;
1546 }
560} 1547}
561 1548
562void inline_speed 1549/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1550inline_speed void ecb_cold
563fd_kill (EV_P_ int fd) 1551fd_kill (EV_P_ int fd)
564{ 1552{
565 ev_io *w; 1553 ev_io *w;
566 1554
567 while ((w = (ev_io *)anfds [fd].head)) 1555 while ((w = (ev_io *)anfds [fd].head))
… …
569 ev_io_stop (EV_A_ w); 1557 ev_io_stop (EV_A_ w);
570 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1558 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
571 } 1559 }
572} 1560}
573 1561
574int inline_size 1562/* check whether the given fd is actually valid, for error recovery */
1563inline_size int ecb_cold
575fd_valid (int fd) 1564fd_valid (int fd)
576{ 1565{
577#ifdef _WIN32 1566#ifdef _WIN32
578 return _get_osfhandle (fd) != -1; 1567 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
579#else 1568#else
580 return fcntl (fd, F_GETFD) != -1; 1569 return fcntl (fd, F_GETFD) != -1;
581#endif 1570#endif
582} 1571}
583 1572
584/* called on EBADF to verify fds */ 1573/* called on EBADF to verify fds */
585static void noinline 1574static void noinline ecb_cold
586fd_ebadf (EV_P) 1575fd_ebadf (EV_P)
587{ 1576{
588 int fd; 1577 int fd;
589 1578
590 for (fd = 0; fd < anfdmax; ++fd) 1579 for (fd = 0; fd < anfdmax; ++fd)
591 if (anfds [fd].events) 1580 if (anfds [fd].events)
592 if (!fd_valid (fd) == -1 && errno == EBADF) 1581 if (!fd_valid (fd) && errno == EBADF)
593 fd_kill (EV_A_ fd); 1582 fd_kill (EV_A_ fd);
594} 1583}
595 1584
596/* called on ENOMEM in select/poll to kill some fds and retry */ 1585/* called on ENOMEM in select/poll to kill some fds and retry */
597static void noinline 1586static void noinline ecb_cold
598fd_enomem (EV_P) 1587fd_enomem (EV_P)
599{ 1588{
600 int fd; 1589 int fd;
601 1590
602 for (fd = anfdmax; fd--; ) 1591 for (fd = anfdmax; fd--; )
603 if (anfds [fd].events) 1592 if (anfds [fd].events)
604 { 1593 {
605 fd_kill (EV_A_ fd); 1594 fd_kill (EV_A_ fd);
606 return; 1595 break;
607 } 1596 }
608} 1597}
609 1598
610/* usually called after fork if backend needs to re-arm all fds from scratch */ 1599/* usually called after fork if backend needs to re-arm all fds from scratch */
611static void noinline 1600static void noinline
… …
615 1604
616 for (fd = 0; fd < anfdmax; ++fd) 1605 for (fd = 0; fd < anfdmax; ++fd)
617 if (anfds [fd].events) 1606 if (anfds [fd].events)
618 { 1607 {
619 anfds [fd].events = 0; 1608 anfds [fd].events = 0;
620 fd_change (EV_A_ fd); 1609 anfds [fd].emask = 0;
1610 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
621 } 1611 }
622} 1612}
623 1613
624/*****************************************************************************/ 1614/* used to prepare libev internal fd's */
625 1615/* this is not fork-safe */
626void inline_speed 1616inline_speed void
627upheap (WT *heap, int k)
628{
629 WT w = heap [k];
630
631 while (k && heap [k >> 1]->at > w->at)
632 {
633 heap [k] = heap [k >> 1];
634 ((W)heap [k])->active = k + 1;
635 k >>= 1;
636 }
637
638 heap [k] = w;
639 ((W)heap [k])->active = k + 1;
640
641}
642
643void inline_speed
644downheap (WT *heap, int N, int k)
645{
646 WT w = heap [k];
647
648 while (k < (N >> 1))
649 {
650 int j = k << 1;
651
652 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
653 ++j;
654
655 if (w->at <= heap [j]->at)
656 break;
657
658 heap [k] = heap [j];
659 ((W)heap [k])->active = k + 1;
660 k = j;
661 }
662
663 heap [k] = w;
664 ((W)heap [k])->active = k + 1;
665}
666
667void inline_size
668adjustheap (WT *heap, int N, int k)
669{
670 upheap (heap, k);
671 downheap (heap, N, k);
672}
673
674/*****************************************************************************/
675
676typedef struct
677{
678 WL head;
679 sig_atomic_t volatile gotsig;
680} ANSIG;
681
682static ANSIG *signals;
683static int signalmax;
684
685static int sigpipe [2];
686static sig_atomic_t volatile gotsig;
687static ev_io sigev;
688
689void inline_size
690signals_init (ANSIG *base, int count)
691{
692 while (count--)
693 {
694 base->head = 0;
695 base->gotsig = 0;
696
697 ++base;
698 }
699}
700
701static void
702sighandler (int signum)
703{
704#if _WIN32
705 signal (signum, sighandler);
706#endif
707
708 signals [signum - 1].gotsig = 1;
709
710 if (!gotsig)
711 {
712 int old_errno = errno;
713 gotsig = 1;
714 write (sigpipe [1], &signum, 1);
715 errno = old_errno;
716 }
717}
718
719void noinline
720ev_feed_signal_event (EV_P_ int signum)
721{
722 WL w;
723
724#if EV_MULTIPLICITY
725 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
726#endif
727
728 --signum;
729
730 if (signum < 0 || signum >= signalmax)
731 return;
732
733 signals [signum].gotsig = 0;
734
735 for (w = signals [signum].head; w; w = w->next)
736 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
737}
738
739static void
740sigcb (EV_P_ ev_io *iow, int revents)
741{
742 int signum;
743
744 read (sigpipe [0], &revents, 1);
745 gotsig = 0;
746
747 for (signum = signalmax; signum--; )
748 if (signals [signum].gotsig)
749 ev_feed_signal_event (EV_A_ signum + 1);
750}
751
752void inline_size
753fd_intern (int fd) 1617fd_intern (int fd)
754{ 1618{
755#ifdef _WIN32 1619#ifdef _WIN32
756 int arg = 1; 1620 unsigned long arg = 1;
757 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1621 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
758#else 1622#else
759 fcntl (fd, F_SETFD, FD_CLOEXEC); 1623 fcntl (fd, F_SETFD, FD_CLOEXEC);
760 fcntl (fd, F_SETFL, O_NONBLOCK); 1624 fcntl (fd, F_SETFL, O_NONBLOCK);
761#endif 1625#endif
762} 1626}
763 1627
764static void noinline
765siginit (EV_P)
766{
767 fd_intern (sigpipe [0]);
768 fd_intern (sigpipe [1]);
769
770 ev_io_set (&sigev, sigpipe [0], EV_READ);
771 ev_io_start (EV_A_ &sigev);
772 ev_unref (EV_A); /* child watcher should not keep loop alive */
773}
774
775/*****************************************************************************/ 1628/*****************************************************************************/
776 1629
777static ev_child *childs [EV_PID_HASHSIZE]; 1630/*
1631 * the heap functions want a real array index. array index 0 is guaranteed to not
1632 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1633 * the branching factor of the d-tree.
1634 */
778 1635
1636/*
1637 * at the moment we allow libev the luxury of two heaps,
1638 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1639 * which is more cache-efficient.
1640 * the difference is about 5% with 50000+ watchers.
1641 */
1642#if EV_USE_4HEAP
1643
1644#define DHEAP 4
1645#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1646#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1647#define UPHEAP_DONE(p,k) ((p) == (k))
1648
1649/* away from the root */
1650inline_speed void
1651downheap (ANHE *heap, int N, int k)
1652{
1653 ANHE he = heap [k];
1654 ANHE *E = heap + N + HEAP0;
1655
1656 for (;;)
1657 {
1658 ev_tstamp minat;
1659 ANHE *minpos;
1660 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1661
1662 /* find minimum child */
1663 if (expect_true (pos + DHEAP - 1 < E))
1664 {
1665 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1666 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1667 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1668 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1669 }
1670 else if (pos < E)
1671 {
1672 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1673 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1674 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1675 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1676 }
1677 else
1678 break;
1679
1680 if (ANHE_at (he) <= minat)
1681 break;
1682
1683 heap [k] = *minpos;
1684 ev_active (ANHE_w (*minpos)) = k;
1685
1686 k = minpos - heap;
1687 }
1688
1689 heap [k] = he;
1690 ev_active (ANHE_w (he)) = k;
1691}
1692
1693#else /* 4HEAP */
1694
1695#define HEAP0 1
1696#define HPARENT(k) ((k) >> 1)
1697#define UPHEAP_DONE(p,k) (!(p))
1698
1699/* away from the root */
1700inline_speed void
1701downheap (ANHE *heap, int N, int k)
1702{
1703 ANHE he = heap [k];
1704
1705 for (;;)
1706 {
1707 int c = k << 1;
1708
1709 if (c >= N + HEAP0)
1710 break;
1711
1712 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1713 ? 1 : 0;
1714
1715 if (ANHE_at (he) <= ANHE_at (heap [c]))
1716 break;
1717
1718 heap [k] = heap [c];
1719 ev_active (ANHE_w (heap [k])) = k;
1720
1721 k = c;
1722 }
1723
1724 heap [k] = he;
1725 ev_active (ANHE_w (he)) = k;
1726}
1727#endif
1728
1729/* towards the root */
1730inline_speed void
1731upheap (ANHE *heap, int k)
1732{
1733 ANHE he = heap [k];
1734
1735 for (;;)
1736 {
1737 int p = HPARENT (k);
1738
1739 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1740 break;
1741
1742 heap [k] = heap [p];
1743 ev_active (ANHE_w (heap [k])) = k;
1744 k = p;
1745 }
1746
1747 heap [k] = he;
1748 ev_active (ANHE_w (he)) = k;
1749}
1750
1751/* move an element suitably so it is in a correct place */
1752inline_size void
1753adjustheap (ANHE *heap, int N, int k)
1754{
1755 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1756 upheap (heap, k);
1757 else
1758 downheap (heap, N, k);
1759}
1760
1761/* rebuild the heap: this function is used only once and executed rarely */
1762inline_size void
1763reheap (ANHE *heap, int N)
1764{
1765 int i;
1766
1767 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1768 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1769 for (i = 0; i < N; ++i)
1770 upheap (heap, i + HEAP0);
1771}
1772
1773/*****************************************************************************/
1774
1775/* associate signal watchers to a signal signal */
1776typedef struct
1777{
1778 EV_ATOMIC_T pending;
1779#if EV_MULTIPLICITY
1780 EV_P;
1781#endif
1782 WL head;
1783} ANSIG;
1784
1785static ANSIG signals [EV_NSIG - 1];
1786
1787/*****************************************************************************/
1788
1789#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1790
1791static void noinline ecb_cold
1792evpipe_init (EV_P)
1793{
1794 if (!ev_is_active (&pipe_w))
1795 {
1796# if EV_USE_EVENTFD
1797 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1798 if (evfd < 0 && errno == EINVAL)
1799 evfd = eventfd (0, 0);
1800
1801 if (evfd >= 0)
1802 {
1803 evpipe [0] = -1;
1804 fd_intern (evfd); /* doing it twice doesn't hurt */
1805 ev_io_set (&pipe_w, evfd, EV_READ);
1806 }
1807 else
1808# endif
1809 {
1810 while (pipe (evpipe))
1811 ev_syserr ("(libev) error creating signal/async pipe");
1812
1813 fd_intern (evpipe [0]);
1814 fd_intern (evpipe [1]);
1815 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1816 }
1817
1818 ev_io_start (EV_A_ &pipe_w);
1819 ev_unref (EV_A); /* watcher should not keep loop alive */
1820 }
1821}
1822
1823inline_speed void
1824evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1825{
1826 if (expect_true (*flag))
1827 return;
1828
1829 *flag = 1;
1830
1831 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1832
1833 pipe_write_skipped = 1;
1834
1835 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1836
1837 if (pipe_write_wanted)
1838 {
1839 int old_errno;
1840
1841 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1842
1843 old_errno = errno; /* save errno because write will clobber it */
1844
1845#if EV_USE_EVENTFD
1846 if (evfd >= 0)
1847 {
1848 uint64_t counter = 1;
1849 write (evfd, &counter, sizeof (uint64_t));
1850 }
1851 else
1852#endif
1853 {
1854 /* win32 people keep sending patches that change this write() to send() */
1855 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1856 /* so when you think this write should be a send instead, please find out */
1857 /* where your send() is from - it's definitely not the microsoft send, and */
1858 /* tell me. thank you. */
1859 write (evpipe [1], &(evpipe [1]), 1);
1860 }
1861
1862 errno = old_errno;
1863 }
1864}
1865
1866/* called whenever the libev signal pipe */
1867/* got some events (signal, async) */
1868static void
1869pipecb (EV_P_ ev_io *iow, int revents)
1870{
1871 int i;
1872
1873 if (revents & EV_READ)
1874 {
1875#if EV_USE_EVENTFD
1876 if (evfd >= 0)
1877 {
1878 uint64_t counter;
1879 read (evfd, &counter, sizeof (uint64_t));
1880 }
1881 else
1882#endif
1883 {
1884 char dummy;
1885 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1886 read (evpipe [0], &dummy, 1);
1887 }
1888 }
1889
1890 pipe_write_skipped = 0;
1891
1892#if EV_SIGNAL_ENABLE
1893 if (sig_pending)
1894 {
1895 sig_pending = 0;
1896
1897 for (i = EV_NSIG - 1; i--; )
1898 if (expect_false (signals [i].pending))
1899 ev_feed_signal_event (EV_A_ i + 1);
1900 }
1901#endif
1902
1903#if EV_ASYNC_ENABLE
1904 if (async_pending)
1905 {
1906 async_pending = 0;
1907
1908 for (i = asynccnt; i--; )
1909 if (asyncs [i]->sent)
1910 {
1911 asyncs [i]->sent = 0;
1912 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1913 }
1914 }
1915#endif
1916}
1917
1918/*****************************************************************************/
1919
1920void
1921ev_feed_signal (int signum)
1922{
1923#if EV_MULTIPLICITY
1924 EV_P = signals [signum - 1].loop;
1925
1926 if (!EV_A)
1927 return;
1928#endif
1929
1930 if (!ev_active (&pipe_w))
1931 return;
1932
1933 signals [signum - 1].pending = 1;
1934 evpipe_write (EV_A_ &sig_pending);
1935}
1936
1937static void
1938ev_sighandler (int signum)
1939{
779#ifndef _WIN32 1940#ifdef _WIN32
1941 signal (signum, ev_sighandler);
1942#endif
1943
1944 ev_feed_signal (signum);
1945}
1946
1947void noinline
1948ev_feed_signal_event (EV_P_ int signum)
1949{
1950 WL w;
1951
1952 if (expect_false (signum <= 0 || signum > EV_NSIG))
1953 return;
1954
1955 --signum;
1956
1957#if EV_MULTIPLICITY
1958 /* it is permissible to try to feed a signal to the wrong loop */
1959 /* or, likely more useful, feeding a signal nobody is waiting for */
1960
1961 if (expect_false (signals [signum].loop != EV_A))
1962 return;
1963#endif
1964
1965 signals [signum].pending = 0;
1966
1967 for (w = signals [signum].head; w; w = w->next)
1968 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1969}
1970
1971#if EV_USE_SIGNALFD
1972static void
1973sigfdcb (EV_P_ ev_io *iow, int revents)
1974{
1975 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1976
1977 for (;;)
1978 {
1979 ssize_t res = read (sigfd, si, sizeof (si));
1980
1981 /* not ISO-C, as res might be -1, but works with SuS */
1982 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1983 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1984
1985 if (res < (ssize_t)sizeof (si))
1986 break;
1987 }
1988}
1989#endif
1990
1991#endif
1992
1993/*****************************************************************************/
1994
1995#if EV_CHILD_ENABLE
1996static WL childs [EV_PID_HASHSIZE];
780 1997
781static ev_signal childev; 1998static ev_signal childev;
782 1999
783void inline_speed 2000#ifndef WIFCONTINUED
2001# define WIFCONTINUED(status) 0
2002#endif
2003
2004/* handle a single child status event */
2005inline_speed void
784child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2006child_reap (EV_P_ int chain, int pid, int status)
785{ 2007{
786 ev_child *w; 2008 ev_child *w;
2009 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
787 2010
788 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2011 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2012 {
789 if (w->pid == pid || !w->pid) 2013 if ((w->pid == pid || !w->pid)
2014 && (!traced || (w->flags & 1)))
790 { 2015 {
791 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2016 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
792 w->rpid = pid; 2017 w->rpid = pid;
793 w->rstatus = status; 2018 w->rstatus = status;
794 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2019 ev_feed_event (EV_A_ (W)w, EV_CHILD);
795 } 2020 }
2021 }
796} 2022}
797 2023
798#ifndef WCONTINUED 2024#ifndef WCONTINUED
799# define WCONTINUED 0 2025# define WCONTINUED 0
800#endif 2026#endif
801 2027
2028/* called on sigchld etc., calls waitpid */
802static void 2029static void
803childcb (EV_P_ ev_signal *sw, int revents) 2030childcb (EV_P_ ev_signal *sw, int revents)
804{ 2031{
805 int pid, status; 2032 int pid, status;
806 2033
… …
809 if (!WCONTINUED 2036 if (!WCONTINUED
810 || errno != EINVAL 2037 || errno != EINVAL
811 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2038 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
812 return; 2039 return;
813 2040
814 /* make sure we are called again until all childs have been reaped */ 2041 /* make sure we are called again until all children have been reaped */
815 /* we need to do it this way so that the callback gets called before we continue */ 2042 /* we need to do it this way so that the callback gets called before we continue */
816 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2043 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
817 2044
818 child_reap (EV_A_ sw, pid, pid, status); 2045 child_reap (EV_A_ pid, pid, status);
819 if (EV_PID_HASHSIZE > 1) 2046 if ((EV_PID_HASHSIZE) > 1)
820 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2047 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
821} 2048}
822 2049
823#endif 2050#endif
824 2051
825/*****************************************************************************/ 2052/*****************************************************************************/
826 2053
2054#if EV_USE_IOCP
2055# include "ev_iocp.c"
2056#endif
827#if EV_USE_PORT 2057#if EV_USE_PORT
828# include "ev_port.c" 2058# include "ev_port.c"
829#endif 2059#endif
830#if EV_USE_KQUEUE 2060#if EV_USE_KQUEUE
831# include "ev_kqueue.c" 2061# include "ev_kqueue.c"
… …
838#endif 2068#endif
839#if EV_USE_SELECT 2069#if EV_USE_SELECT
840# include "ev_select.c" 2070# include "ev_select.c"
841#endif 2071#endif
842 2072
843int 2073int ecb_cold
844ev_version_major (void) 2074ev_version_major (void)
845{ 2075{
846 return EV_VERSION_MAJOR; 2076 return EV_VERSION_MAJOR;
847} 2077}
848 2078
849int 2079int ecb_cold
850ev_version_minor (void) 2080ev_version_minor (void)
851{ 2081{
852 return EV_VERSION_MINOR; 2082 return EV_VERSION_MINOR;
853} 2083}
854 2084
855/* return true if we are running with elevated privileges and should ignore env variables */ 2085/* return true if we are running with elevated privileges and should ignore env variables */
856int inline_size 2086int inline_size ecb_cold
857enable_secure (void) 2087enable_secure (void)
858{ 2088{
859#ifdef _WIN32 2089#ifdef _WIN32
860 return 0; 2090 return 0;
861#else 2091#else
862 return getuid () != geteuid () 2092 return getuid () != geteuid ()
863 || getgid () != getegid (); 2093 || getgid () != getegid ();
864#endif 2094#endif
865} 2095}
866 2096
867unsigned int 2097unsigned int ecb_cold
868ev_supported_backends (void) 2098ev_supported_backends (void)
869{ 2099{
870 unsigned int flags = 0; 2100 unsigned int flags = 0;
871 2101
872 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2102 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
876 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2106 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
877 2107
878 return flags; 2108 return flags;
879} 2109}
880 2110
881unsigned int 2111unsigned int ecb_cold
882ev_recommended_backends (void) 2112ev_recommended_backends (void)
883{ 2113{
884 unsigned int flags = ev_supported_backends (); 2114 unsigned int flags = ev_supported_backends ();
885 2115
886#ifndef __NetBSD__ 2116#ifndef __NetBSD__
887 /* kqueue is borked on everything but netbsd apparently */ 2117 /* kqueue is borked on everything but netbsd apparently */
888 /* it usually doesn't work correctly on anything but sockets and pipes */ 2118 /* it usually doesn't work correctly on anything but sockets and pipes */
889 flags &= ~EVBACKEND_KQUEUE; 2119 flags &= ~EVBACKEND_KQUEUE;
890#endif 2120#endif
891#ifdef __APPLE__ 2121#ifdef __APPLE__
892 // flags &= ~EVBACKEND_KQUEUE; for documentation 2122 /* only select works correctly on that "unix-certified" platform */
893 flags &= ~EVBACKEND_POLL; 2123 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2124 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2125#endif
2126#ifdef __FreeBSD__
2127 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
894#endif 2128#endif
895 2129
896 return flags; 2130 return flags;
897} 2131}
898 2132
899unsigned int 2133unsigned int ecb_cold
900ev_embeddable_backends (void) 2134ev_embeddable_backends (void)
901{ 2135{
902 return EVBACKEND_EPOLL 2136 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
903 | EVBACKEND_KQUEUE 2137
904 | EVBACKEND_PORT; 2138 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2139 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2140 flags &= ~EVBACKEND_EPOLL;
2141
2142 return flags;
905} 2143}
906 2144
907unsigned int 2145unsigned int
908ev_backend (EV_P) 2146ev_backend (EV_P)
909{ 2147{
910 return backend; 2148 return backend;
911} 2149}
912 2150
2151#if EV_FEATURE_API
913unsigned int 2152unsigned int
914ev_loop_count (EV_P) 2153ev_iteration (EV_P)
915{ 2154{
916 return loop_count; 2155 return loop_count;
917} 2156}
918 2157
2158unsigned int
2159ev_depth (EV_P)
2160{
2161 return loop_depth;
2162}
2163
2164void
2165ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2166{
2167 io_blocktime = interval;
2168}
2169
2170void
2171ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2172{
2173 timeout_blocktime = interval;
2174}
2175
2176void
2177ev_set_userdata (EV_P_ void *data)
2178{
2179 userdata = data;
2180}
2181
2182void *
2183ev_userdata (EV_P)
2184{
2185 return userdata;
2186}
2187
2188void
2189ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2190{
2191 invoke_cb = invoke_pending_cb;
2192}
2193
2194void
2195ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2196{
2197 release_cb = release;
2198 acquire_cb = acquire;
2199}
2200#endif
2201
2202/* initialise a loop structure, must be zero-initialised */
919static void noinline 2203static void noinline ecb_cold
920loop_init (EV_P_ unsigned int flags) 2204loop_init (EV_P_ unsigned int flags)
921{ 2205{
922 if (!backend) 2206 if (!backend)
923 { 2207 {
2208 origflags = flags;
2209
2210#if EV_USE_REALTIME
2211 if (!have_realtime)
2212 {
2213 struct timespec ts;
2214
2215 if (!clock_gettime (CLOCK_REALTIME, &ts))
2216 have_realtime = 1;
2217 }
2218#endif
2219
924#if EV_USE_MONOTONIC 2220#if EV_USE_MONOTONIC
2221 if (!have_monotonic)
925 { 2222 {
926 struct timespec ts; 2223 struct timespec ts;
2224
927 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2225 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
928 have_monotonic = 1; 2226 have_monotonic = 1;
929 } 2227 }
930#endif 2228#endif
931
932 ev_rt_now = ev_time ();
933 mn_now = get_clock ();
934 now_floor = mn_now;
935 rtmn_diff = ev_rt_now - mn_now;
936 2229
937 /* pid check not overridable via env */ 2230 /* pid check not overridable via env */
938#ifndef _WIN32 2231#ifndef _WIN32
939 if (flags & EVFLAG_FORKCHECK) 2232 if (flags & EVFLAG_FORKCHECK)
940 curpid = getpid (); 2233 curpid = getpid ();
… …
943 if (!(flags & EVFLAG_NOENV) 2236 if (!(flags & EVFLAG_NOENV)
944 && !enable_secure () 2237 && !enable_secure ()
945 && getenv ("LIBEV_FLAGS")) 2238 && getenv ("LIBEV_FLAGS"))
946 flags = atoi (getenv ("LIBEV_FLAGS")); 2239 flags = atoi (getenv ("LIBEV_FLAGS"));
947 2240
948 if (!(flags & 0x0000ffffUL)) 2241 ev_rt_now = ev_time ();
2242 mn_now = get_clock ();
2243 now_floor = mn_now;
2244 rtmn_diff = ev_rt_now - mn_now;
2245#if EV_FEATURE_API
2246 invoke_cb = ev_invoke_pending;
2247#endif
2248
2249 io_blocktime = 0.;
2250 timeout_blocktime = 0.;
2251 backend = 0;
2252 backend_fd = -1;
2253 sig_pending = 0;
2254#if EV_ASYNC_ENABLE
2255 async_pending = 0;
2256#endif
2257 pipe_write_skipped = 0;
2258 pipe_write_wanted = 0;
2259#if EV_USE_INOTIFY
2260 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2261#endif
2262#if EV_USE_SIGNALFD
2263 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2264#endif
2265
2266 if (!(flags & EVBACKEND_MASK))
949 flags |= ev_recommended_backends (); 2267 flags |= ev_recommended_backends ();
950 2268
951 backend = 0;
952 backend_fd = -1;
953#if EV_USE_INOTIFY 2269#if EV_USE_IOCP
954 fs_fd = -2; 2270 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
955#endif 2271#endif
956
957#if EV_USE_PORT 2272#if EV_USE_PORT
958 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2273 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
959#endif 2274#endif
960#if EV_USE_KQUEUE 2275#if EV_USE_KQUEUE
961 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2276 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
968#endif 2283#endif
969#if EV_USE_SELECT 2284#if EV_USE_SELECT
970 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2285 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
971#endif 2286#endif
972 2287
2288 ev_prepare_init (&pending_w, pendingcb);
2289
2290#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
973 ev_init (&sigev, sigcb); 2291 ev_init (&pipe_w, pipecb);
974 ev_set_priority (&sigev, EV_MAXPRI); 2292 ev_set_priority (&pipe_w, EV_MAXPRI);
2293#endif
975 } 2294 }
976} 2295}
977 2296
978static void noinline 2297/* free up a loop structure */
2298void ecb_cold
979loop_destroy (EV_P) 2299ev_loop_destroy (EV_P)
980{ 2300{
981 int i; 2301 int i;
2302
2303#if EV_MULTIPLICITY
2304 /* mimic free (0) */
2305 if (!EV_A)
2306 return;
2307#endif
2308
2309#if EV_CLEANUP_ENABLE
2310 /* queue cleanup watchers (and execute them) */
2311 if (expect_false (cleanupcnt))
2312 {
2313 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2314 EV_INVOKE_PENDING;
2315 }
2316#endif
2317
2318#if EV_CHILD_ENABLE
2319 if (ev_is_active (&childev))
2320 {
2321 ev_ref (EV_A); /* child watcher */
2322 ev_signal_stop (EV_A_ &childev);
2323 }
2324#endif
2325
2326 if (ev_is_active (&pipe_w))
2327 {
2328 /*ev_ref (EV_A);*/
2329 /*ev_io_stop (EV_A_ &pipe_w);*/
2330
2331#if EV_USE_EVENTFD
2332 if (evfd >= 0)
2333 close (evfd);
2334#endif
2335
2336 if (evpipe [0] >= 0)
2337 {
2338 EV_WIN32_CLOSE_FD (evpipe [0]);
2339 EV_WIN32_CLOSE_FD (evpipe [1]);
2340 }
2341 }
2342
2343#if EV_USE_SIGNALFD
2344 if (ev_is_active (&sigfd_w))
2345 close (sigfd);
2346#endif
982 2347
983#if EV_USE_INOTIFY 2348#if EV_USE_INOTIFY
984 if (fs_fd >= 0) 2349 if (fs_fd >= 0)
985 close (fs_fd); 2350 close (fs_fd);
986#endif 2351#endif
987 2352
988 if (backend_fd >= 0) 2353 if (backend_fd >= 0)
989 close (backend_fd); 2354 close (backend_fd);
990 2355
2356#if EV_USE_IOCP
2357 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2358#endif
991#if EV_USE_PORT 2359#if EV_USE_PORT
992 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2360 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
993#endif 2361#endif
994#if EV_USE_KQUEUE 2362#if EV_USE_KQUEUE
995 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2363 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1010#if EV_IDLE_ENABLE 2378#if EV_IDLE_ENABLE
1011 array_free (idle, [i]); 2379 array_free (idle, [i]);
1012#endif 2380#endif
1013 } 2381 }
1014 2382
2383 ev_free (anfds); anfds = 0; anfdmax = 0;
2384
1015 /* have to use the microsoft-never-gets-it-right macro */ 2385 /* have to use the microsoft-never-gets-it-right macro */
2386 array_free (rfeed, EMPTY);
1016 array_free (fdchange, EMPTY); 2387 array_free (fdchange, EMPTY);
1017 array_free (timer, EMPTY); 2388 array_free (timer, EMPTY);
1018#if EV_PERIODIC_ENABLE 2389#if EV_PERIODIC_ENABLE
1019 array_free (periodic, EMPTY); 2390 array_free (periodic, EMPTY);
1020#endif 2391#endif
2392#if EV_FORK_ENABLE
2393 array_free (fork, EMPTY);
2394#endif
2395#if EV_CLEANUP_ENABLE
2396 array_free (cleanup, EMPTY);
2397#endif
1021 array_free (prepare, EMPTY); 2398 array_free (prepare, EMPTY);
1022 array_free (check, EMPTY); 2399 array_free (check, EMPTY);
2400#if EV_ASYNC_ENABLE
2401 array_free (async, EMPTY);
2402#endif
1023 2403
1024 backend = 0; 2404 backend = 0;
1025}
1026 2405
2406#if EV_MULTIPLICITY
2407 if (ev_is_default_loop (EV_A))
2408#endif
2409 ev_default_loop_ptr = 0;
2410#if EV_MULTIPLICITY
2411 else
2412 ev_free (EV_A);
2413#endif
2414}
2415
2416#if EV_USE_INOTIFY
1027void inline_size infy_fork (EV_P); 2417inline_size void infy_fork (EV_P);
2418#endif
1028 2419
1029void inline_size 2420inline_size void
1030loop_fork (EV_P) 2421loop_fork (EV_P)
1031{ 2422{
1032#if EV_USE_PORT 2423#if EV_USE_PORT
1033 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2424 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1034#endif 2425#endif
… …
1040#endif 2431#endif
1041#if EV_USE_INOTIFY 2432#if EV_USE_INOTIFY
1042 infy_fork (EV_A); 2433 infy_fork (EV_A);
1043#endif 2434#endif
1044 2435
1045 if (ev_is_active (&sigev)) 2436 if (ev_is_active (&pipe_w))
1046 { 2437 {
1047 /* default loop */ 2438 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1048 2439
1049 ev_ref (EV_A); 2440 ev_ref (EV_A);
1050 ev_io_stop (EV_A_ &sigev); 2441 ev_io_stop (EV_A_ &pipe_w);
1051 close (sigpipe [0]);
1052 close (sigpipe [1]);
1053 2442
1054 while (pipe (sigpipe)) 2443#if EV_USE_EVENTFD
1055 syserr ("(libev) error creating pipe"); 2444 if (evfd >= 0)
2445 close (evfd);
2446#endif
1056 2447
2448 if (evpipe [0] >= 0)
2449 {
2450 EV_WIN32_CLOSE_FD (evpipe [0]);
2451 EV_WIN32_CLOSE_FD (evpipe [1]);
2452 }
2453
2454#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1057 siginit (EV_A); 2455 evpipe_init (EV_A);
2456 /* now iterate over everything, in case we missed something */
2457 pipecb (EV_A_ &pipe_w, EV_READ);
2458#endif
1058 } 2459 }
1059 2460
1060 postfork = 0; 2461 postfork = 0;
1061} 2462}
1062 2463
1063#if EV_MULTIPLICITY 2464#if EV_MULTIPLICITY
2465
1064struct ev_loop * 2466struct ev_loop * ecb_cold
1065ev_loop_new (unsigned int flags) 2467ev_loop_new (unsigned int flags)
1066{ 2468{
1067 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2469 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1068 2470
1069 memset (loop, 0, sizeof (struct ev_loop)); 2471 memset (EV_A, 0, sizeof (struct ev_loop));
1070
1071 loop_init (EV_A_ flags); 2472 loop_init (EV_A_ flags);
1072 2473
1073 if (ev_backend (EV_A)) 2474 if (ev_backend (EV_A))
1074 return loop; 2475 return EV_A;
1075 2476
2477 ev_free (EV_A);
1076 return 0; 2478 return 0;
1077} 2479}
1078 2480
1079void 2481#endif /* multiplicity */
1080ev_loop_destroy (EV_P)
1081{
1082 loop_destroy (EV_A);
1083 ev_free (loop);
1084}
1085 2482
1086void 2483#if EV_VERIFY
1087ev_loop_fork (EV_P) 2484static void noinline ecb_cold
2485verify_watcher (EV_P_ W w)
1088{ 2486{
1089 postfork = 1; 2487 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1090}
1091 2488
2489 if (w->pending)
2490 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2491}
2492
2493static void noinline ecb_cold
2494verify_heap (EV_P_ ANHE *heap, int N)
2495{
2496 int i;
2497
2498 for (i = HEAP0; i < N + HEAP0; ++i)
2499 {
2500 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2501 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2502 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2503
2504 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2505 }
2506}
2507
2508static void noinline ecb_cold
2509array_verify (EV_P_ W *ws, int cnt)
2510{
2511 while (cnt--)
2512 {
2513 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2514 verify_watcher (EV_A_ ws [cnt]);
2515 }
2516}
2517#endif
2518
2519#if EV_FEATURE_API
2520void ecb_cold
2521ev_verify (EV_P)
2522{
2523#if EV_VERIFY
2524 int i;
2525 WL w;
2526
2527 assert (activecnt >= -1);
2528
2529 assert (fdchangemax >= fdchangecnt);
2530 for (i = 0; i < fdchangecnt; ++i)
2531 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2532
2533 assert (anfdmax >= 0);
2534 for (i = 0; i < anfdmax; ++i)
2535 for (w = anfds [i].head; w; w = w->next)
2536 {
2537 verify_watcher (EV_A_ (W)w);
2538 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2539 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2540 }
2541
2542 assert (timermax >= timercnt);
2543 verify_heap (EV_A_ timers, timercnt);
2544
2545#if EV_PERIODIC_ENABLE
2546 assert (periodicmax >= periodiccnt);
2547 verify_heap (EV_A_ periodics, periodiccnt);
2548#endif
2549
2550 for (i = NUMPRI; i--; )
2551 {
2552 assert (pendingmax [i] >= pendingcnt [i]);
2553#if EV_IDLE_ENABLE
2554 assert (idleall >= 0);
2555 assert (idlemax [i] >= idlecnt [i]);
2556 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2557#endif
2558 }
2559
2560#if EV_FORK_ENABLE
2561 assert (forkmax >= forkcnt);
2562 array_verify (EV_A_ (W *)forks, forkcnt);
2563#endif
2564
2565#if EV_CLEANUP_ENABLE
2566 assert (cleanupmax >= cleanupcnt);
2567 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2568#endif
2569
2570#if EV_ASYNC_ENABLE
2571 assert (asyncmax >= asynccnt);
2572 array_verify (EV_A_ (W *)asyncs, asynccnt);
2573#endif
2574
2575#if EV_PREPARE_ENABLE
2576 assert (preparemax >= preparecnt);
2577 array_verify (EV_A_ (W *)prepares, preparecnt);
2578#endif
2579
2580#if EV_CHECK_ENABLE
2581 assert (checkmax >= checkcnt);
2582 array_verify (EV_A_ (W *)checks, checkcnt);
2583#endif
2584
2585# if 0
2586#if EV_CHILD_ENABLE
2587 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2588 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2589#endif
2590# endif
2591#endif
2592}
1092#endif 2593#endif
1093 2594
1094#if EV_MULTIPLICITY 2595#if EV_MULTIPLICITY
1095struct ev_loop * 2596struct ev_loop * ecb_cold
1096ev_default_loop_init (unsigned int flags)
1097#else 2597#else
1098int 2598int
2599#endif
1099ev_default_loop (unsigned int flags) 2600ev_default_loop (unsigned int flags)
1100#endif
1101{ 2601{
1102 if (sigpipe [0] == sigpipe [1])
1103 if (pipe (sigpipe))
1104 return 0;
1105
1106 if (!ev_default_loop_ptr) 2602 if (!ev_default_loop_ptr)
1107 { 2603 {
1108#if EV_MULTIPLICITY 2604#if EV_MULTIPLICITY
1109 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2605 EV_P = ev_default_loop_ptr = &default_loop_struct;
1110#else 2606#else
1111 ev_default_loop_ptr = 1; 2607 ev_default_loop_ptr = 1;
1112#endif 2608#endif
1113 2609
1114 loop_init (EV_A_ flags); 2610 loop_init (EV_A_ flags);
1115 2611
1116 if (ev_backend (EV_A)) 2612 if (ev_backend (EV_A))
1117 { 2613 {
1118 siginit (EV_A); 2614#if EV_CHILD_ENABLE
1119
1120#ifndef _WIN32
1121 ev_signal_init (&childev, childcb, SIGCHLD); 2615 ev_signal_init (&childev, childcb, SIGCHLD);
1122 ev_set_priority (&childev, EV_MAXPRI); 2616 ev_set_priority (&childev, EV_MAXPRI);
1123 ev_signal_start (EV_A_ &childev); 2617 ev_signal_start (EV_A_ &childev);
1124 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2618 ev_unref (EV_A); /* child watcher should not keep loop alive */
1125#endif 2619#endif
… …
1130 2624
1131 return ev_default_loop_ptr; 2625 return ev_default_loop_ptr;
1132} 2626}
1133 2627
1134void 2628void
1135ev_default_destroy (void) 2629ev_loop_fork (EV_P)
1136{ 2630{
1137#if EV_MULTIPLICITY 2631 postfork = 1; /* must be in line with ev_default_fork */
1138 struct ev_loop *loop = ev_default_loop_ptr;
1139#endif
1140
1141#ifndef _WIN32
1142 ev_ref (EV_A); /* child watcher */
1143 ev_signal_stop (EV_A_ &childev);
1144#endif
1145
1146 ev_ref (EV_A); /* signal watcher */
1147 ev_io_stop (EV_A_ &sigev);
1148
1149 close (sigpipe [0]); sigpipe [0] = 0;
1150 close (sigpipe [1]); sigpipe [1] = 0;
1151
1152 loop_destroy (EV_A);
1153} 2632}
2633
2634/*****************************************************************************/
1154 2635
1155void 2636void
1156ev_default_fork (void) 2637ev_invoke (EV_P_ void *w, int revents)
1157{ 2638{
1158#if EV_MULTIPLICITY 2639 EV_CB_INVOKE ((W)w, revents);
1159 struct ev_loop *loop = ev_default_loop_ptr;
1160#endif
1161
1162 if (backend)
1163 postfork = 1;
1164} 2640}
1165 2641
1166/*****************************************************************************/ 2642unsigned int
2643ev_pending_count (EV_P)
2644{
2645 int pri;
2646 unsigned int count = 0;
1167 2647
1168void inline_speed 2648 for (pri = NUMPRI; pri--; )
1169call_pending (EV_P) 2649 count += pendingcnt [pri];
2650
2651 return count;
2652}
2653
2654void noinline
2655ev_invoke_pending (EV_P)
1170{ 2656{
1171 int pri; 2657 int pri;
1172 2658
1173 for (pri = NUMPRI; pri--; ) 2659 for (pri = NUMPRI; pri--; )
1174 while (pendingcnt [pri]) 2660 while (pendingcnt [pri])
1175 { 2661 {
1176 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2662 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1177 2663
1178 if (expect_true (p->w))
1179 {
1180 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1181
1182 p->w->pending = 0; 2664 p->w->pending = 0;
1183 EV_CB_INVOKE (p->w, p->events); 2665 EV_CB_INVOKE (p->w, p->events);
1184 } 2666 EV_FREQUENT_CHECK;
1185 } 2667 }
1186} 2668}
1187 2669
1188void inline_size
1189timers_reify (EV_P)
1190{
1191 while (timercnt && ((WT)timers [0])->at <= mn_now)
1192 {
1193 ev_timer *w = timers [0];
1194
1195 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1196
1197 /* first reschedule or stop timer */
1198 if (w->repeat)
1199 {
1200 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1201
1202 ((WT)w)->at += w->repeat;
1203 if (((WT)w)->at < mn_now)
1204 ((WT)w)->at = mn_now;
1205
1206 downheap ((WT *)timers, timercnt, 0);
1207 }
1208 else
1209 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1210
1211 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1212 }
1213}
1214
1215#if EV_PERIODIC_ENABLE
1216void inline_size
1217periodics_reify (EV_P)
1218{
1219 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1220 {
1221 ev_periodic *w = periodics [0];
1222
1223 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1224
1225 /* first reschedule or stop timer */
1226 if (w->reschedule_cb)
1227 {
1228 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1229 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1230 downheap ((WT *)periodics, periodiccnt, 0);
1231 }
1232 else if (w->interval)
1233 {
1234 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1235 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1236 downheap ((WT *)periodics, periodiccnt, 0);
1237 }
1238 else
1239 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1240
1241 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1242 }
1243}
1244
1245static void noinline
1246periodics_reschedule (EV_P)
1247{
1248 int i;
1249
1250 /* adjust periodics after time jump */
1251 for (i = 0; i < periodiccnt; ++i)
1252 {
1253 ev_periodic *w = periodics [i];
1254
1255 if (w->reschedule_cb)
1256 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1257 else if (w->interval)
1258 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1259 }
1260
1261 /* now rebuild the heap */
1262 for (i = periodiccnt >> 1; i--; )
1263 downheap ((WT *)periodics, periodiccnt, i);
1264}
1265#endif
1266
1267#if EV_IDLE_ENABLE 2670#if EV_IDLE_ENABLE
1268void inline_size 2671/* make idle watchers pending. this handles the "call-idle */
2672/* only when higher priorities are idle" logic */
2673inline_size void
1269idle_reify (EV_P) 2674idle_reify (EV_P)
1270{ 2675{
1271 if (expect_false (!idleall)) 2676 if (expect_false (idleall))
1272 { 2677 {
1273 int pri; 2678 int pri;
1274 2679
1275 for (pri = NUMPRI; pri--; ) 2680 for (pri = NUMPRI; pri--; )
1276 { 2681 {
… …
1285 } 2690 }
1286 } 2691 }
1287} 2692}
1288#endif 2693#endif
1289 2694
1290int inline_size 2695/* make timers pending */
1291time_update_monotonic (EV_P) 2696inline_size void
2697timers_reify (EV_P)
1292{ 2698{
2699 EV_FREQUENT_CHECK;
2700
2701 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2702 {
2703 do
2704 {
2705 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2706
2707 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2708
2709 /* first reschedule or stop timer */
2710 if (w->repeat)
2711 {
2712 ev_at (w) += w->repeat;
2713 if (ev_at (w) < mn_now)
2714 ev_at (w) = mn_now;
2715
2716 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2717
2718 ANHE_at_cache (timers [HEAP0]);
2719 downheap (timers, timercnt, HEAP0);
2720 }
2721 else
2722 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2723
2724 EV_FREQUENT_CHECK;
2725 feed_reverse (EV_A_ (W)w);
2726 }
2727 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2728
2729 feed_reverse_done (EV_A_ EV_TIMER);
2730 }
2731}
2732
2733#if EV_PERIODIC_ENABLE
2734
2735static void noinline
2736periodic_recalc (EV_P_ ev_periodic *w)
2737{
2738 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2739 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2740
2741 /* the above almost always errs on the low side */
2742 while (at <= ev_rt_now)
2743 {
2744 ev_tstamp nat = at + w->interval;
2745
2746 /* when resolution fails us, we use ev_rt_now */
2747 if (expect_false (nat == at))
2748 {
2749 at = ev_rt_now;
2750 break;
2751 }
2752
2753 at = nat;
2754 }
2755
2756 ev_at (w) = at;
2757}
2758
2759/* make periodics pending */
2760inline_size void
2761periodics_reify (EV_P)
2762{
2763 EV_FREQUENT_CHECK;
2764
2765 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2766 {
2767 int feed_count = 0;
2768
2769 do
2770 {
2771 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2772
2773 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2774
2775 /* first reschedule or stop timer */
2776 if (w->reschedule_cb)
2777 {
2778 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2779
2780 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2781
2782 ANHE_at_cache (periodics [HEAP0]);
2783 downheap (periodics, periodiccnt, HEAP0);
2784 }
2785 else if (w->interval)
2786 {
2787 periodic_recalc (EV_A_ w);
2788 ANHE_at_cache (periodics [HEAP0]);
2789 downheap (periodics, periodiccnt, HEAP0);
2790 }
2791 else
2792 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2793
2794 EV_FREQUENT_CHECK;
2795 feed_reverse (EV_A_ (W)w);
2796 }
2797 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2798
2799 feed_reverse_done (EV_A_ EV_PERIODIC);
2800 }
2801}
2802
2803/* simply recalculate all periodics */
2804/* TODO: maybe ensure that at least one event happens when jumping forward? */
2805static void noinline ecb_cold
2806periodics_reschedule (EV_P)
2807{
2808 int i;
2809
2810 /* adjust periodics after time jump */
2811 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2812 {
2813 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2814
2815 if (w->reschedule_cb)
2816 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2817 else if (w->interval)
2818 periodic_recalc (EV_A_ w);
2819
2820 ANHE_at_cache (periodics [i]);
2821 }
2822
2823 reheap (periodics, periodiccnt);
2824}
2825#endif
2826
2827/* adjust all timers by a given offset */
2828static void noinline ecb_cold
2829timers_reschedule (EV_P_ ev_tstamp adjust)
2830{
2831 int i;
2832
2833 for (i = 0; i < timercnt; ++i)
2834 {
2835 ANHE *he = timers + i + HEAP0;
2836 ANHE_w (*he)->at += adjust;
2837 ANHE_at_cache (*he);
2838 }
2839}
2840
2841/* fetch new monotonic and realtime times from the kernel */
2842/* also detect if there was a timejump, and act accordingly */
2843inline_speed void
2844time_update (EV_P_ ev_tstamp max_block)
2845{
2846#if EV_USE_MONOTONIC
2847 if (expect_true (have_monotonic))
2848 {
2849 int i;
2850 ev_tstamp odiff = rtmn_diff;
2851
1293 mn_now = get_clock (); 2852 mn_now = get_clock ();
1294 2853
2854 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2855 /* interpolate in the meantime */
1295 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2856 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1296 { 2857 {
1297 ev_rt_now = rtmn_diff + mn_now; 2858 ev_rt_now = rtmn_diff + mn_now;
1298 return 0; 2859 return;
1299 } 2860 }
1300 else 2861
1301 {
1302 now_floor = mn_now; 2862 now_floor = mn_now;
1303 ev_rt_now = ev_time (); 2863 ev_rt_now = ev_time ();
1304 return 1;
1305 }
1306}
1307 2864
1308void inline_size 2865 /* loop a few times, before making important decisions.
1309time_update (EV_P) 2866 * on the choice of "4": one iteration isn't enough,
1310{ 2867 * in case we get preempted during the calls to
1311 int i; 2868 * ev_time and get_clock. a second call is almost guaranteed
1312 2869 * to succeed in that case, though. and looping a few more times
1313#if EV_USE_MONOTONIC 2870 * doesn't hurt either as we only do this on time-jumps or
1314 if (expect_true (have_monotonic)) 2871 * in the unlikely event of having been preempted here.
1315 { 2872 */
1316 if (time_update_monotonic (EV_A)) 2873 for (i = 4; --i; )
1317 { 2874 {
1318 ev_tstamp odiff = rtmn_diff; 2875 ev_tstamp diff;
1319
1320 /* loop a few times, before making important decisions.
1321 * on the choice of "4": one iteration isn't enough,
1322 * in case we get preempted during the calls to
1323 * ev_time and get_clock. a second call is almost guaranteed
1324 * to succeed in that case, though. and looping a few more times
1325 * doesn't hurt either as we only do this on time-jumps or
1326 * in the unlikely event of having been preempted here.
1327 */
1328 for (i = 4; --i; )
1329 {
1330 rtmn_diff = ev_rt_now - mn_now; 2876 rtmn_diff = ev_rt_now - mn_now;
1331 2877
1332 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2878 diff = odiff - rtmn_diff;
2879
2880 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1333 return; /* all is well */ 2881 return; /* all is well */
1334 2882
1335 ev_rt_now = ev_time (); 2883 ev_rt_now = ev_time ();
1336 mn_now = get_clock (); 2884 mn_now = get_clock ();
1337 now_floor = mn_now; 2885 now_floor = mn_now;
1338 } 2886 }
1339 2887
2888 /* no timer adjustment, as the monotonic clock doesn't jump */
2889 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1340# if EV_PERIODIC_ENABLE 2890# if EV_PERIODIC_ENABLE
1341 periodics_reschedule (EV_A); 2891 periodics_reschedule (EV_A);
1342# endif 2892# endif
1343 /* no timer adjustment, as the monotonic clock doesn't jump */
1344 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1345 }
1346 } 2893 }
1347 else 2894 else
1348#endif 2895#endif
1349 { 2896 {
1350 ev_rt_now = ev_time (); 2897 ev_rt_now = ev_time ();
1351 2898
1352 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2899 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1353 { 2900 {
2901 /* adjust timers. this is easy, as the offset is the same for all of them */
2902 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1354#if EV_PERIODIC_ENABLE 2903#if EV_PERIODIC_ENABLE
1355 periodics_reschedule (EV_A); 2904 periodics_reschedule (EV_A);
1356#endif 2905#endif
1357
1358 /* adjust timers. this is easy, as the offset is the same for all of them */
1359 for (i = 0; i < timercnt; ++i)
1360 ((WT)timers [i])->at += ev_rt_now - mn_now;
1361 } 2906 }
1362 2907
1363 mn_now = ev_rt_now; 2908 mn_now = ev_rt_now;
1364 } 2909 }
1365} 2910}
1366 2911
1367void 2912void
1368ev_ref (EV_P)
1369{
1370 ++activecnt;
1371}
1372
1373void
1374ev_unref (EV_P)
1375{
1376 --activecnt;
1377}
1378
1379static int loop_done;
1380
1381void
1382ev_loop (EV_P_ int flags) 2913ev_run (EV_P_ int flags)
1383{ 2914{
1384 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2915#if EV_FEATURE_API
1385 ? EVUNLOOP_ONE 2916 ++loop_depth;
1386 : EVUNLOOP_CANCEL; 2917#endif
1387 2918
2919 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2920
2921 loop_done = EVBREAK_CANCEL;
2922
1388 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2923 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1389 2924
1390 do 2925 do
1391 { 2926 {
2927#if EV_VERIFY >= 2
2928 ev_verify (EV_A);
2929#endif
2930
1392#ifndef _WIN32 2931#ifndef _WIN32
1393 if (expect_false (curpid)) /* penalise the forking check even more */ 2932 if (expect_false (curpid)) /* penalise the forking check even more */
1394 if (expect_false (getpid () != curpid)) 2933 if (expect_false (getpid () != curpid))
1395 { 2934 {
1396 curpid = getpid (); 2935 curpid = getpid ();
… …
1402 /* we might have forked, so queue fork handlers */ 2941 /* we might have forked, so queue fork handlers */
1403 if (expect_false (postfork)) 2942 if (expect_false (postfork))
1404 if (forkcnt) 2943 if (forkcnt)
1405 { 2944 {
1406 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2945 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1407 call_pending (EV_A); 2946 EV_INVOKE_PENDING;
1408 } 2947 }
1409#endif 2948#endif
1410 2949
2950#if EV_PREPARE_ENABLE
1411 /* queue check watchers (and execute them) */ 2951 /* queue prepare watchers (and execute them) */
1412 if (expect_false (preparecnt)) 2952 if (expect_false (preparecnt))
1413 { 2953 {
1414 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2954 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1415 call_pending (EV_A); 2955 EV_INVOKE_PENDING;
1416 } 2956 }
2957#endif
1417 2958
1418 if (expect_false (!activecnt)) 2959 if (expect_false (loop_done))
1419 break; 2960 break;
1420 2961
1421 /* we might have forked, so reify kernel state if necessary */ 2962 /* we might have forked, so reify kernel state if necessary */
1422 if (expect_false (postfork)) 2963 if (expect_false (postfork))
1423 loop_fork (EV_A); 2964 loop_fork (EV_A);
… …
1425 /* update fd-related kernel structures */ 2966 /* update fd-related kernel structures */
1426 fd_reify (EV_A); 2967 fd_reify (EV_A);
1427 2968
1428 /* calculate blocking time */ 2969 /* calculate blocking time */
1429 { 2970 {
1430 ev_tstamp block; 2971 ev_tstamp waittime = 0.;
2972 ev_tstamp sleeptime = 0.;
1431 2973
1432 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2974 /* remember old timestamp for io_blocktime calculation */
1433 block = 0.; /* do not block at all */ 2975 ev_tstamp prev_mn_now = mn_now;
1434 else 2976
2977 /* update time to cancel out callback processing overhead */
2978 time_update (EV_A_ 1e100);
2979
2980 /* from now on, we want a pipe-wake-up */
2981 pipe_write_wanted = 1;
2982
2983 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2984
2985 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1435 { 2986 {
1436 /* update time to cancel out callback processing overhead */
1437#if EV_USE_MONOTONIC
1438 if (expect_true (have_monotonic))
1439 time_update_monotonic (EV_A);
1440 else
1441#endif
1442 {
1443 ev_rt_now = ev_time ();
1444 mn_now = ev_rt_now;
1445 }
1446
1447 block = MAX_BLOCKTIME; 2987 waittime = MAX_BLOCKTIME;
1448 2988
1449 if (timercnt) 2989 if (timercnt)
1450 { 2990 {
1451 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2991 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1452 if (block > to) block = to; 2992 if (waittime > to) waittime = to;
1453 } 2993 }
1454 2994
1455#if EV_PERIODIC_ENABLE 2995#if EV_PERIODIC_ENABLE
1456 if (periodiccnt) 2996 if (periodiccnt)
1457 { 2997 {
1458 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2998 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1459 if (block > to) block = to; 2999 if (waittime > to) waittime = to;
1460 } 3000 }
1461#endif 3001#endif
1462 3002
3003 /* don't let timeouts decrease the waittime below timeout_blocktime */
3004 if (expect_false (waittime < timeout_blocktime))
3005 waittime = timeout_blocktime;
3006
3007 /* at this point, we NEED to wait, so we have to ensure */
3008 /* to pass a minimum nonzero value to the backend */
3009 if (expect_false (waittime < backend_mintime))
3010 waittime = backend_mintime;
3011
3012 /* extra check because io_blocktime is commonly 0 */
1463 if (expect_false (block < 0.)) block = 0.; 3013 if (expect_false (io_blocktime))
3014 {
3015 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3016
3017 if (sleeptime > waittime - backend_mintime)
3018 sleeptime = waittime - backend_mintime;
3019
3020 if (expect_true (sleeptime > 0.))
3021 {
3022 ev_sleep (sleeptime);
3023 waittime -= sleeptime;
3024 }
3025 }
1464 } 3026 }
1465 3027
3028#if EV_FEATURE_API
1466 ++loop_count; 3029 ++loop_count;
3030#endif
3031 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1467 backend_poll (EV_A_ block); 3032 backend_poll (EV_A_ waittime);
3033 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3034
3035 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3036
3037 if (pipe_write_skipped)
3038 {
3039 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3040 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3041 }
3042
3043
3044 /* update ev_rt_now, do magic */
3045 time_update (EV_A_ waittime + sleeptime);
1468 } 3046 }
1469
1470 /* update ev_rt_now, do magic */
1471 time_update (EV_A);
1472 3047
1473 /* queue pending timers and reschedule them */ 3048 /* queue pending timers and reschedule them */
1474 timers_reify (EV_A); /* relative timers called last */ 3049 timers_reify (EV_A); /* relative timers called last */
1475#if EV_PERIODIC_ENABLE 3050#if EV_PERIODIC_ENABLE
1476 periodics_reify (EV_A); /* absolute timers called first */ 3051 periodics_reify (EV_A); /* absolute timers called first */
… …
1479#if EV_IDLE_ENABLE 3054#if EV_IDLE_ENABLE
1480 /* queue idle watchers unless other events are pending */ 3055 /* queue idle watchers unless other events are pending */
1481 idle_reify (EV_A); 3056 idle_reify (EV_A);
1482#endif 3057#endif
1483 3058
3059#if EV_CHECK_ENABLE
1484 /* queue check watchers, to be executed first */ 3060 /* queue check watchers, to be executed first */
1485 if (expect_false (checkcnt)) 3061 if (expect_false (checkcnt))
1486 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3062 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3063#endif
1487 3064
1488 call_pending (EV_A); 3065 EV_INVOKE_PENDING;
1489
1490 } 3066 }
1491 while (expect_true (activecnt && !loop_done)); 3067 while (expect_true (
3068 activecnt
3069 && !loop_done
3070 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3071 ));
1492 3072
1493 if (loop_done == EVUNLOOP_ONE) 3073 if (loop_done == EVBREAK_ONE)
1494 loop_done = EVUNLOOP_CANCEL; 3074 loop_done = EVBREAK_CANCEL;
3075
3076#if EV_FEATURE_API
3077 --loop_depth;
3078#endif
1495} 3079}
1496 3080
1497void 3081void
1498ev_unloop (EV_P_ int how) 3082ev_break (EV_P_ int how)
1499{ 3083{
1500 loop_done = how; 3084 loop_done = how;
1501} 3085}
1502 3086
3087void
3088ev_ref (EV_P)
3089{
3090 ++activecnt;
3091}
3092
3093void
3094ev_unref (EV_P)
3095{
3096 --activecnt;
3097}
3098
3099void
3100ev_now_update (EV_P)
3101{
3102 time_update (EV_A_ 1e100);
3103}
3104
3105void
3106ev_suspend (EV_P)
3107{
3108 ev_now_update (EV_A);
3109}
3110
3111void
3112ev_resume (EV_P)
3113{
3114 ev_tstamp mn_prev = mn_now;
3115
3116 ev_now_update (EV_A);
3117 timers_reschedule (EV_A_ mn_now - mn_prev);
3118#if EV_PERIODIC_ENABLE
3119 /* TODO: really do this? */
3120 periodics_reschedule (EV_A);
3121#endif
3122}
3123
1503/*****************************************************************************/ 3124/*****************************************************************************/
3125/* singly-linked list management, used when the expected list length is short */
1504 3126
1505void inline_size 3127inline_size void
1506wlist_add (WL *head, WL elem) 3128wlist_add (WL *head, WL elem)
1507{ 3129{
1508 elem->next = *head; 3130 elem->next = *head;
1509 *head = elem; 3131 *head = elem;
1510} 3132}
1511 3133
1512void inline_size 3134inline_size void
1513wlist_del (WL *head, WL elem) 3135wlist_del (WL *head, WL elem)
1514{ 3136{
1515 while (*head) 3137 while (*head)
1516 { 3138 {
1517 if (*head == elem) 3139 if (expect_true (*head == elem))
1518 { 3140 {
1519 *head = elem->next; 3141 *head = elem->next;
1520 return; 3142 break;
1521 } 3143 }
1522 3144
1523 head = &(*head)->next; 3145 head = &(*head)->next;
1524 } 3146 }
1525} 3147}
1526 3148
1527void inline_speed 3149/* internal, faster, version of ev_clear_pending */
3150inline_speed void
1528ev_clear_pending (EV_P_ W w) 3151clear_pending (EV_P_ W w)
1529{ 3152{
1530 if (w->pending) 3153 if (w->pending)
1531 { 3154 {
1532 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3155 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1533 w->pending = 0; 3156 w->pending = 0;
1534 } 3157 }
1535} 3158}
1536 3159
1537void inline_size 3160int
3161ev_clear_pending (EV_P_ void *w)
3162{
3163 W w_ = (W)w;
3164 int pending = w_->pending;
3165
3166 if (expect_true (pending))
3167 {
3168 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3169 p->w = (W)&pending_w;
3170 w_->pending = 0;
3171 return p->events;
3172 }
3173 else
3174 return 0;
3175}
3176
3177inline_size void
1538pri_adjust (EV_P_ W w) 3178pri_adjust (EV_P_ W w)
1539{ 3179{
1540 int pri = w->priority; 3180 int pri = ev_priority (w);
1541 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3181 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1542 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3182 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1543 w->priority = pri; 3183 ev_set_priority (w, pri);
1544} 3184}
1545 3185
1546void inline_speed 3186inline_speed void
1547ev_start (EV_P_ W w, int active) 3187ev_start (EV_P_ W w, int active)
1548{ 3188{
1549 pri_adjust (EV_A_ w); 3189 pri_adjust (EV_A_ w);
1550 w->active = active; 3190 w->active = active;
1551 ev_ref (EV_A); 3191 ev_ref (EV_A);
1552} 3192}
1553 3193
1554void inline_size 3194inline_size void
1555ev_stop (EV_P_ W w) 3195ev_stop (EV_P_ W w)
1556{ 3196{
1557 ev_unref (EV_A); 3197 ev_unref (EV_A);
1558 w->active = 0; 3198 w->active = 0;
1559} 3199}
1560 3200
1561/*****************************************************************************/ 3201/*****************************************************************************/
1562 3202
1563void 3203void noinline
1564ev_io_start (EV_P_ ev_io *w) 3204ev_io_start (EV_P_ ev_io *w)
1565{ 3205{
1566 int fd = w->fd; 3206 int fd = w->fd;
1567 3207
1568 if (expect_false (ev_is_active (w))) 3208 if (expect_false (ev_is_active (w)))
1569 return; 3209 return;
1570 3210
1571 assert (("ev_io_start called with negative fd", fd >= 0)); 3211 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3212 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3213
3214 EV_FREQUENT_CHECK;
1572 3215
1573 ev_start (EV_A_ (W)w, 1); 3216 ev_start (EV_A_ (W)w, 1);
1574 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3217 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1575 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3218 wlist_add (&anfds[fd].head, (WL)w);
1576 3219
1577 fd_change (EV_A_ fd); 3220 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1578} 3221 w->events &= ~EV__IOFDSET;
1579 3222
1580void 3223 EV_FREQUENT_CHECK;
3224}
3225
3226void noinline
1581ev_io_stop (EV_P_ ev_io *w) 3227ev_io_stop (EV_P_ ev_io *w)
1582{ 3228{
1583 ev_clear_pending (EV_A_ (W)w); 3229 clear_pending (EV_A_ (W)w);
1584 if (expect_false (!ev_is_active (w))) 3230 if (expect_false (!ev_is_active (w)))
1585 return; 3231 return;
1586 3232
1587 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3233 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1588 3234
3235 EV_FREQUENT_CHECK;
3236
1589 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3237 wlist_del (&anfds[w->fd].head, (WL)w);
1590 ev_stop (EV_A_ (W)w); 3238 ev_stop (EV_A_ (W)w);
1591 3239
1592 fd_change (EV_A_ w->fd); 3240 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1593}
1594 3241
1595void 3242 EV_FREQUENT_CHECK;
3243}
3244
3245void noinline
1596ev_timer_start (EV_P_ ev_timer *w) 3246ev_timer_start (EV_P_ ev_timer *w)
1597{ 3247{
1598 if (expect_false (ev_is_active (w))) 3248 if (expect_false (ev_is_active (w)))
1599 return; 3249 return;
1600 3250
1601 ((WT)w)->at += mn_now; 3251 ev_at (w) += mn_now;
1602 3252
1603 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3253 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1604 3254
3255 EV_FREQUENT_CHECK;
3256
3257 ++timercnt;
1605 ev_start (EV_A_ (W)w, ++timercnt); 3258 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1606 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 3259 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1607 timers [timercnt - 1] = w; 3260 ANHE_w (timers [ev_active (w)]) = (WT)w;
1608 upheap ((WT *)timers, timercnt - 1); 3261 ANHE_at_cache (timers [ev_active (w)]);
3262 upheap (timers, ev_active (w));
1609 3263
3264 EV_FREQUENT_CHECK;
3265
1610 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3266 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1611} 3267}
1612 3268
1613void 3269void noinline
1614ev_timer_stop (EV_P_ ev_timer *w) 3270ev_timer_stop (EV_P_ ev_timer *w)
1615{ 3271{
1616 ev_clear_pending (EV_A_ (W)w); 3272 clear_pending (EV_A_ (W)w);
1617 if (expect_false (!ev_is_active (w))) 3273 if (expect_false (!ev_is_active (w)))
1618 return; 3274 return;
1619 3275
1620 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3276 EV_FREQUENT_CHECK;
1621 3277
1622 { 3278 {
1623 int active = ((W)w)->active; 3279 int active = ev_active (w);
1624 3280
3281 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3282
3283 --timercnt;
3284
1625 if (expect_true (--active < --timercnt)) 3285 if (expect_true (active < timercnt + HEAP0))
1626 { 3286 {
1627 timers [active] = timers [timercnt]; 3287 timers [active] = timers [timercnt + HEAP0];
1628 adjustheap ((WT *)timers, timercnt, active); 3288 adjustheap (timers, timercnt, active);
1629 } 3289 }
1630 } 3290 }
1631 3291
1632 ((WT)w)->at -= mn_now; 3292 ev_at (w) -= mn_now;
1633 3293
1634 ev_stop (EV_A_ (W)w); 3294 ev_stop (EV_A_ (W)w);
1635}
1636 3295
1637void 3296 EV_FREQUENT_CHECK;
3297}
3298
3299void noinline
1638ev_timer_again (EV_P_ ev_timer *w) 3300ev_timer_again (EV_P_ ev_timer *w)
1639{ 3301{
3302 EV_FREQUENT_CHECK;
3303
3304 clear_pending (EV_A_ (W)w);
3305
1640 if (ev_is_active (w)) 3306 if (ev_is_active (w))
1641 { 3307 {
1642 if (w->repeat) 3308 if (w->repeat)
1643 { 3309 {
1644 ((WT)w)->at = mn_now + w->repeat; 3310 ev_at (w) = mn_now + w->repeat;
3311 ANHE_at_cache (timers [ev_active (w)]);
1645 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3312 adjustheap (timers, timercnt, ev_active (w));
1646 } 3313 }
1647 else 3314 else
1648 ev_timer_stop (EV_A_ w); 3315 ev_timer_stop (EV_A_ w);
1649 } 3316 }
1650 else if (w->repeat) 3317 else if (w->repeat)
1651 { 3318 {
1652 w->at = w->repeat; 3319 ev_at (w) = w->repeat;
1653 ev_timer_start (EV_A_ w); 3320 ev_timer_start (EV_A_ w);
1654 } 3321 }
3322
3323 EV_FREQUENT_CHECK;
3324}
3325
3326ev_tstamp
3327ev_timer_remaining (EV_P_ ev_timer *w)
3328{
3329 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1655} 3330}
1656 3331
1657#if EV_PERIODIC_ENABLE 3332#if EV_PERIODIC_ENABLE
1658void 3333void noinline
1659ev_periodic_start (EV_P_ ev_periodic *w) 3334ev_periodic_start (EV_P_ ev_periodic *w)
1660{ 3335{
1661 if (expect_false (ev_is_active (w))) 3336 if (expect_false (ev_is_active (w)))
1662 return; 3337 return;
1663 3338
1664 if (w->reschedule_cb) 3339 if (w->reschedule_cb)
1665 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3340 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1666 else if (w->interval) 3341 else if (w->interval)
1667 { 3342 {
1668 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3343 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1669 /* this formula differs from the one in periodic_reify because we do not always round up */ 3344 periodic_recalc (EV_A_ w);
1670 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1671 } 3345 }
3346 else
3347 ev_at (w) = w->offset;
1672 3348
3349 EV_FREQUENT_CHECK;
3350
3351 ++periodiccnt;
1673 ev_start (EV_A_ (W)w, ++periodiccnt); 3352 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1674 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3353 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1675 periodics [periodiccnt - 1] = w; 3354 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1676 upheap ((WT *)periodics, periodiccnt - 1); 3355 ANHE_at_cache (periodics [ev_active (w)]);
3356 upheap (periodics, ev_active (w));
1677 3357
3358 EV_FREQUENT_CHECK;
3359
1678 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3360 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1679} 3361}
1680 3362
1681void 3363void noinline
1682ev_periodic_stop (EV_P_ ev_periodic *w) 3364ev_periodic_stop (EV_P_ ev_periodic *w)
1683{ 3365{
1684 ev_clear_pending (EV_A_ (W)w); 3366 clear_pending (EV_A_ (W)w);
1685 if (expect_false (!ev_is_active (w))) 3367 if (expect_false (!ev_is_active (w)))
1686 return; 3368 return;
1687 3369
1688 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3370 EV_FREQUENT_CHECK;
1689 3371
1690 { 3372 {
1691 int active = ((W)w)->active; 3373 int active = ev_active (w);
1692 3374
3375 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3376
3377 --periodiccnt;
3378
1693 if (expect_true (--active < --periodiccnt)) 3379 if (expect_true (active < periodiccnt + HEAP0))
1694 { 3380 {
1695 periodics [active] = periodics [periodiccnt]; 3381 periodics [active] = periodics [periodiccnt + HEAP0];
1696 adjustheap ((WT *)periodics, periodiccnt, active); 3382 adjustheap (periodics, periodiccnt, active);
1697 } 3383 }
1698 } 3384 }
1699 3385
1700 ev_stop (EV_A_ (W)w); 3386 ev_stop (EV_A_ (W)w);
1701}
1702 3387
1703void 3388 EV_FREQUENT_CHECK;
3389}
3390
3391void noinline
1704ev_periodic_again (EV_P_ ev_periodic *w) 3392ev_periodic_again (EV_P_ ev_periodic *w)
1705{ 3393{
1706 /* TODO: use adjustheap and recalculation */ 3394 /* TODO: use adjustheap and recalculation */
1707 ev_periodic_stop (EV_A_ w); 3395 ev_periodic_stop (EV_A_ w);
1708 ev_periodic_start (EV_A_ w); 3396 ev_periodic_start (EV_A_ w);
… …
1711 3399
1712#ifndef SA_RESTART 3400#ifndef SA_RESTART
1713# define SA_RESTART 0 3401# define SA_RESTART 0
1714#endif 3402#endif
1715 3403
1716void 3404#if EV_SIGNAL_ENABLE
3405
3406void noinline
1717ev_signal_start (EV_P_ ev_signal *w) 3407ev_signal_start (EV_P_ ev_signal *w)
1718{ 3408{
1719#if EV_MULTIPLICITY
1720 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1721#endif
1722 if (expect_false (ev_is_active (w))) 3409 if (expect_false (ev_is_active (w)))
1723 return; 3410 return;
1724 3411
1725 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3412 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3413
3414#if EV_MULTIPLICITY
3415 assert (("libev: a signal must not be attached to two different loops",
3416 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3417
3418 signals [w->signum - 1].loop = EV_A;
3419#endif
3420
3421 EV_FREQUENT_CHECK;
3422
3423#if EV_USE_SIGNALFD
3424 if (sigfd == -2)
3425 {
3426 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3427 if (sigfd < 0 && errno == EINVAL)
3428 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3429
3430 if (sigfd >= 0)
3431 {
3432 fd_intern (sigfd); /* doing it twice will not hurt */
3433
3434 sigemptyset (&sigfd_set);
3435
3436 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3437 ev_set_priority (&sigfd_w, EV_MAXPRI);
3438 ev_io_start (EV_A_ &sigfd_w);
3439 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3440 }
3441 }
3442
3443 if (sigfd >= 0)
3444 {
3445 /* TODO: check .head */
3446 sigaddset (&sigfd_set, w->signum);
3447 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3448
3449 signalfd (sigfd, &sigfd_set, 0);
3450 }
3451#endif
1726 3452
1727 ev_start (EV_A_ (W)w, 1); 3453 ev_start (EV_A_ (W)w, 1);
1728 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1729 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3454 wlist_add (&signals [w->signum - 1].head, (WL)w);
1730 3455
1731 if (!((WL)w)->next) 3456 if (!((WL)w)->next)
3457# if EV_USE_SIGNALFD
3458 if (sigfd < 0) /*TODO*/
3459# endif
1732 { 3460 {
1733#if _WIN32 3461# ifdef _WIN32
3462 evpipe_init (EV_A);
3463
1734 signal (w->signum, sighandler); 3464 signal (w->signum, ev_sighandler);
1735#else 3465# else
1736 struct sigaction sa; 3466 struct sigaction sa;
3467
3468 evpipe_init (EV_A);
3469
1737 sa.sa_handler = sighandler; 3470 sa.sa_handler = ev_sighandler;
1738 sigfillset (&sa.sa_mask); 3471 sigfillset (&sa.sa_mask);
1739 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3472 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1740 sigaction (w->signum, &sa, 0); 3473 sigaction (w->signum, &sa, 0);
3474
3475 if (origflags & EVFLAG_NOSIGMASK)
3476 {
3477 sigemptyset (&sa.sa_mask);
3478 sigaddset (&sa.sa_mask, w->signum);
3479 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3480 }
1741#endif 3481#endif
1742 } 3482 }
1743}
1744 3483
1745void 3484 EV_FREQUENT_CHECK;
3485}
3486
3487void noinline
1746ev_signal_stop (EV_P_ ev_signal *w) 3488ev_signal_stop (EV_P_ ev_signal *w)
1747{ 3489{
1748 ev_clear_pending (EV_A_ (W)w); 3490 clear_pending (EV_A_ (W)w);
1749 if (expect_false (!ev_is_active (w))) 3491 if (expect_false (!ev_is_active (w)))
1750 return; 3492 return;
1751 3493
3494 EV_FREQUENT_CHECK;
3495
1752 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3496 wlist_del (&signals [w->signum - 1].head, (WL)w);
1753 ev_stop (EV_A_ (W)w); 3497 ev_stop (EV_A_ (W)w);
1754 3498
1755 if (!signals [w->signum - 1].head) 3499 if (!signals [w->signum - 1].head)
3500 {
3501#if EV_MULTIPLICITY
3502 signals [w->signum - 1].loop = 0; /* unattach from signal */
3503#endif
3504#if EV_USE_SIGNALFD
3505 if (sigfd >= 0)
3506 {
3507 sigset_t ss;
3508
3509 sigemptyset (&ss);
3510 sigaddset (&ss, w->signum);
3511 sigdelset (&sigfd_set, w->signum);
3512
3513 signalfd (sigfd, &sigfd_set, 0);
3514 sigprocmask (SIG_UNBLOCK, &ss, 0);
3515 }
3516 else
3517#endif
1756 signal (w->signum, SIG_DFL); 3518 signal (w->signum, SIG_DFL);
3519 }
3520
3521 EV_FREQUENT_CHECK;
1757} 3522}
3523
3524#endif
3525
3526#if EV_CHILD_ENABLE
1758 3527
1759void 3528void
1760ev_child_start (EV_P_ ev_child *w) 3529ev_child_start (EV_P_ ev_child *w)
1761{ 3530{
1762#if EV_MULTIPLICITY 3531#if EV_MULTIPLICITY
1763 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3532 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1764#endif 3533#endif
1765 if (expect_false (ev_is_active (w))) 3534 if (expect_false (ev_is_active (w)))
1766 return; 3535 return;
1767 3536
3537 EV_FREQUENT_CHECK;
3538
1768 ev_start (EV_A_ (W)w, 1); 3539 ev_start (EV_A_ (W)w, 1);
1769 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3540 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3541
3542 EV_FREQUENT_CHECK;
1770} 3543}
1771 3544
1772void 3545void
1773ev_child_stop (EV_P_ ev_child *w) 3546ev_child_stop (EV_P_ ev_child *w)
1774{ 3547{
1775 ev_clear_pending (EV_A_ (W)w); 3548 clear_pending (EV_A_ (W)w);
1776 if (expect_false (!ev_is_active (w))) 3549 if (expect_false (!ev_is_active (w)))
1777 return; 3550 return;
1778 3551
3552 EV_FREQUENT_CHECK;
3553
1779 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3554 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1780 ev_stop (EV_A_ (W)w); 3555 ev_stop (EV_A_ (W)w);
3556
3557 EV_FREQUENT_CHECK;
1781} 3558}
3559
3560#endif
1782 3561
1783#if EV_STAT_ENABLE 3562#if EV_STAT_ENABLE
1784 3563
1785# ifdef _WIN32 3564# ifdef _WIN32
1786# undef lstat 3565# undef lstat
1787# define lstat(a,b) _stati64 (a,b) 3566# define lstat(a,b) _stati64 (a,b)
1788# endif 3567# endif
1789 3568
1790#define DEF_STAT_INTERVAL 5.0074891 3569#define DEF_STAT_INTERVAL 5.0074891
3570#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1791#define MIN_STAT_INTERVAL 0.1074891 3571#define MIN_STAT_INTERVAL 0.1074891
1792 3572
1793static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3573static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1794 3574
1795#if EV_USE_INOTIFY 3575#if EV_USE_INOTIFY
1796# define EV_INOTIFY_BUFSIZE 8192 3576
3577/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3578# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1797 3579
1798static void noinline 3580static void noinline
1799infy_add (EV_P_ ev_stat *w) 3581infy_add (EV_P_ ev_stat *w)
1800{ 3582{
1801 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); 3583 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);
1802 3584
1803 if (w->wd < 0) 3585 if (w->wd >= 0)
3586 {
3587 struct statfs sfs;
3588
3589 /* now local changes will be tracked by inotify, but remote changes won't */
3590 /* unless the filesystem is known to be local, we therefore still poll */
3591 /* also do poll on <2.6.25, but with normal frequency */
3592
3593 if (!fs_2625)
3594 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3595 else if (!statfs (w->path, &sfs)
3596 && (sfs.f_type == 0x1373 /* devfs */
3597 || sfs.f_type == 0xEF53 /* ext2/3 */
3598 || sfs.f_type == 0x3153464a /* jfs */
3599 || sfs.f_type == 0x52654973 /* reiser3 */
3600 || sfs.f_type == 0x01021994 /* tempfs */
3601 || sfs.f_type == 0x58465342 /* xfs */))
3602 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3603 else
3604 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1804 { 3605 }
1805 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3606 else
3607 {
3608 /* can't use inotify, continue to stat */
3609 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1806 3610
1807 /* monitor some parent directory for speedup hints */ 3611 /* if path is not there, monitor some parent directory for speedup hints */
3612 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3613 /* but an efficiency issue only */
1808 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3614 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1809 { 3615 {
1810 char path [4096]; 3616 char path [4096];
1811 strcpy (path, w->path); 3617 strcpy (path, w->path);
1812 3618
… …
1815 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3621 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1816 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3622 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1817 3623
1818 char *pend = strrchr (path, '/'); 3624 char *pend = strrchr (path, '/');
1819 3625
1820 if (!pend) 3626 if (!pend || pend == path)
1821 break; /* whoops, no '/', complain to your admin */ 3627 break;
1822 3628
1823 *pend = 0; 3629 *pend = 0;
1824 w->wd = inotify_add_watch (fs_fd, path, mask); 3630 w->wd = inotify_add_watch (fs_fd, path, mask);
1825 } 3631 }
1826 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3632 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1827 } 3633 }
1828 } 3634 }
1829 else
1830 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1831 3635
1832 if (w->wd >= 0) 3636 if (w->wd >= 0)
1833 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3637 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3638
3639 /* now re-arm timer, if required */
3640 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3641 ev_timer_again (EV_A_ &w->timer);
3642 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1834} 3643}
1835 3644
1836static void noinline 3645static void noinline
1837infy_del (EV_P_ ev_stat *w) 3646infy_del (EV_P_ ev_stat *w)
1838{ 3647{
… …
1841 3650
1842 if (wd < 0) 3651 if (wd < 0)
1843 return; 3652 return;
1844 3653
1845 w->wd = -2; 3654 w->wd = -2;
1846 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3655 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1847 wlist_del (&fs_hash [slot].head, (WL)w); 3656 wlist_del (&fs_hash [slot].head, (WL)w);
1848 3657
1849 /* remove this watcher, if others are watching it, they will rearm */ 3658 /* remove this watcher, if others are watching it, they will rearm */
1850 inotify_rm_watch (fs_fd, wd); 3659 inotify_rm_watch (fs_fd, wd);
1851} 3660}
1852 3661
1853static void noinline 3662static void noinline
1854infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3663infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1855{ 3664{
1856 if (slot < 0) 3665 if (slot < 0)
1857 /* overflow, need to check for all hahs slots */ 3666 /* overflow, need to check for all hash slots */
1858 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3667 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1859 infy_wd (EV_A_ slot, wd, ev); 3668 infy_wd (EV_A_ slot, wd, ev);
1860 else 3669 else
1861 { 3670 {
1862 WL w_; 3671 WL w_;
1863 3672
1864 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3673 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1865 { 3674 {
1866 ev_stat *w = (ev_stat *)w_; 3675 ev_stat *w = (ev_stat *)w_;
1867 w_ = w_->next; /* lets us remove this watcher and all before it */ 3676 w_ = w_->next; /* lets us remove this watcher and all before it */
1868 3677
1869 if (w->wd == wd || wd == -1) 3678 if (w->wd == wd || wd == -1)
1870 { 3679 {
1871 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3680 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1872 { 3681 {
3682 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1873 w->wd = -1; 3683 w->wd = -1;
1874 infy_add (EV_A_ w); /* re-add, no matter what */ 3684 infy_add (EV_A_ w); /* re-add, no matter what */
1875 } 3685 }
1876 3686
1877 stat_timer_cb (EV_A_ &w->timer, 0); 3687 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1882 3692
1883static void 3693static void
1884infy_cb (EV_P_ ev_io *w, int revents) 3694infy_cb (EV_P_ ev_io *w, int revents)
1885{ 3695{
1886 char buf [EV_INOTIFY_BUFSIZE]; 3696 char buf [EV_INOTIFY_BUFSIZE];
1887 struct inotify_event *ev = (struct inotify_event *)buf;
1888 int ofs; 3697 int ofs;
1889 int len = read (fs_fd, buf, sizeof (buf)); 3698 int len = read (fs_fd, buf, sizeof (buf));
1890 3699
1891 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3700 for (ofs = 0; ofs < len; )
3701 {
3702 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1892 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3703 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3704 ofs += sizeof (struct inotify_event) + ev->len;
3705 }
1893} 3706}
1894 3707
1895void inline_size 3708inline_size void ecb_cold
3709ev_check_2625 (EV_P)
3710{
3711 /* kernels < 2.6.25 are borked
3712 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3713 */
3714 if (ev_linux_version () < 0x020619)
3715 return;
3716
3717 fs_2625 = 1;
3718}
3719
3720inline_size int
3721infy_newfd (void)
3722{
3723#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3724 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3725 if (fd >= 0)
3726 return fd;
3727#endif
3728 return inotify_init ();
3729}
3730
3731inline_size void
1896infy_init (EV_P) 3732infy_init (EV_P)
1897{ 3733{
1898 if (fs_fd != -2) 3734 if (fs_fd != -2)
1899 return; 3735 return;
1900 3736
3737 fs_fd = -1;
3738
3739 ev_check_2625 (EV_A);
3740
1901 fs_fd = inotify_init (); 3741 fs_fd = infy_newfd ();
1902 3742
1903 if (fs_fd >= 0) 3743 if (fs_fd >= 0)
1904 { 3744 {
3745 fd_intern (fs_fd);
1905 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3746 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1906 ev_set_priority (&fs_w, EV_MAXPRI); 3747 ev_set_priority (&fs_w, EV_MAXPRI);
1907 ev_io_start (EV_A_ &fs_w); 3748 ev_io_start (EV_A_ &fs_w);
3749 ev_unref (EV_A);
1908 } 3750 }
1909} 3751}
1910 3752
1911void inline_size 3753inline_size void
1912infy_fork (EV_P) 3754infy_fork (EV_P)
1913{ 3755{
1914 int slot; 3756 int slot;
1915 3757
1916 if (fs_fd < 0) 3758 if (fs_fd < 0)
1917 return; 3759 return;
1918 3760
3761 ev_ref (EV_A);
3762 ev_io_stop (EV_A_ &fs_w);
1919 close (fs_fd); 3763 close (fs_fd);
1920 fs_fd = inotify_init (); 3764 fs_fd = infy_newfd ();
1921 3765
3766 if (fs_fd >= 0)
3767 {
3768 fd_intern (fs_fd);
3769 ev_io_set (&fs_w, fs_fd, EV_READ);
3770 ev_io_start (EV_A_ &fs_w);
3771 ev_unref (EV_A);
3772 }
3773
1922 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3774 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1923 { 3775 {
1924 WL w_ = fs_hash [slot].head; 3776 WL w_ = fs_hash [slot].head;
1925 fs_hash [slot].head = 0; 3777 fs_hash [slot].head = 0;
1926 3778
1927 while (w_) 3779 while (w_)
… …
1932 w->wd = -1; 3784 w->wd = -1;
1933 3785
1934 if (fs_fd >= 0) 3786 if (fs_fd >= 0)
1935 infy_add (EV_A_ w); /* re-add, no matter what */ 3787 infy_add (EV_A_ w); /* re-add, no matter what */
1936 else 3788 else
3789 {
3790 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3791 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1937 ev_timer_start (EV_A_ &w->timer); 3792 ev_timer_again (EV_A_ &w->timer);
3793 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3794 }
1938 } 3795 }
1939
1940 } 3796 }
1941} 3797}
1942 3798
3799#endif
3800
3801#ifdef _WIN32
3802# define EV_LSTAT(p,b) _stati64 (p, b)
3803#else
3804# define EV_LSTAT(p,b) lstat (p, b)
1943#endif 3805#endif
1944 3806
1945void 3807void
1946ev_stat_stat (EV_P_ ev_stat *w) 3808ev_stat_stat (EV_P_ ev_stat *w)
1947{ 3809{
… …
1954static void noinline 3816static void noinline
1955stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3817stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1956{ 3818{
1957 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3819 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1958 3820
1959 /* we copy this here each the time so that */ 3821 ev_statdata prev = w->attr;
1960 /* prev has the old value when the callback gets invoked */
1961 w->prev = w->attr;
1962 ev_stat_stat (EV_A_ w); 3822 ev_stat_stat (EV_A_ w);
1963 3823
1964 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3824 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1965 if ( 3825 if (
1966 w->prev.st_dev != w->attr.st_dev 3826 prev.st_dev != w->attr.st_dev
1967 || w->prev.st_ino != w->attr.st_ino 3827 || prev.st_ino != w->attr.st_ino
1968 || w->prev.st_mode != w->attr.st_mode 3828 || prev.st_mode != w->attr.st_mode
1969 || w->prev.st_nlink != w->attr.st_nlink 3829 || prev.st_nlink != w->attr.st_nlink
1970 || w->prev.st_uid != w->attr.st_uid 3830 || prev.st_uid != w->attr.st_uid
1971 || w->prev.st_gid != w->attr.st_gid 3831 || prev.st_gid != w->attr.st_gid
1972 || w->prev.st_rdev != w->attr.st_rdev 3832 || prev.st_rdev != w->attr.st_rdev
1973 || w->prev.st_size != w->attr.st_size 3833 || prev.st_size != w->attr.st_size
1974 || w->prev.st_atime != w->attr.st_atime 3834 || prev.st_atime != w->attr.st_atime
1975 || w->prev.st_mtime != w->attr.st_mtime 3835 || prev.st_mtime != w->attr.st_mtime
1976 || w->prev.st_ctime != w->attr.st_ctime 3836 || prev.st_ctime != w->attr.st_ctime
1977 ) { 3837 ) {
3838 /* we only update w->prev on actual differences */
3839 /* in case we test more often than invoke the callback, */
3840 /* to ensure that prev is always different to attr */
3841 w->prev = prev;
3842
1978 #if EV_USE_INOTIFY 3843 #if EV_USE_INOTIFY
3844 if (fs_fd >= 0)
3845 {
1979 infy_del (EV_A_ w); 3846 infy_del (EV_A_ w);
1980 infy_add (EV_A_ w); 3847 infy_add (EV_A_ w);
1981 ev_stat_stat (EV_A_ w); /* avoid race... */ 3848 ev_stat_stat (EV_A_ w); /* avoid race... */
3849 }
1982 #endif 3850 #endif
1983 3851
1984 ev_feed_event (EV_A_ w, EV_STAT); 3852 ev_feed_event (EV_A_ w, EV_STAT);
1985 } 3853 }
1986} 3854}
… …
1989ev_stat_start (EV_P_ ev_stat *w) 3857ev_stat_start (EV_P_ ev_stat *w)
1990{ 3858{
1991 if (expect_false (ev_is_active (w))) 3859 if (expect_false (ev_is_active (w)))
1992 return; 3860 return;
1993 3861
1994 /* since we use memcmp, we need to clear any padding data etc. */
1995 memset (&w->prev, 0, sizeof (ev_statdata));
1996 memset (&w->attr, 0, sizeof (ev_statdata));
1997
1998 ev_stat_stat (EV_A_ w); 3862 ev_stat_stat (EV_A_ w);
1999 3863
3864 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2000 if (w->interval < MIN_STAT_INTERVAL) 3865 w->interval = MIN_STAT_INTERVAL;
2001 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2002 3866
2003 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3867 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2004 ev_set_priority (&w->timer, ev_priority (w)); 3868 ev_set_priority (&w->timer, ev_priority (w));
2005 3869
2006#if EV_USE_INOTIFY 3870#if EV_USE_INOTIFY
2007 infy_init (EV_A); 3871 infy_init (EV_A);
2008 3872
2009 if (fs_fd >= 0) 3873 if (fs_fd >= 0)
2010 infy_add (EV_A_ w); 3874 infy_add (EV_A_ w);
2011 else 3875 else
2012#endif 3876#endif
3877 {
2013 ev_timer_start (EV_A_ &w->timer); 3878 ev_timer_again (EV_A_ &w->timer);
3879 ev_unref (EV_A);
3880 }
2014 3881
2015 ev_start (EV_A_ (W)w, 1); 3882 ev_start (EV_A_ (W)w, 1);
3883
3884 EV_FREQUENT_CHECK;
2016} 3885}
2017 3886
2018void 3887void
2019ev_stat_stop (EV_P_ ev_stat *w) 3888ev_stat_stop (EV_P_ ev_stat *w)
2020{ 3889{
2021 ev_clear_pending (EV_A_ (W)w); 3890 clear_pending (EV_A_ (W)w);
2022 if (expect_false (!ev_is_active (w))) 3891 if (expect_false (!ev_is_active (w)))
2023 return; 3892 return;
2024 3893
3894 EV_FREQUENT_CHECK;
3895
2025#if EV_USE_INOTIFY 3896#if EV_USE_INOTIFY
2026 infy_del (EV_A_ w); 3897 infy_del (EV_A_ w);
2027#endif 3898#endif
3899
3900 if (ev_is_active (&w->timer))
3901 {
3902 ev_ref (EV_A);
2028 ev_timer_stop (EV_A_ &w->timer); 3903 ev_timer_stop (EV_A_ &w->timer);
3904 }
2029 3905
2030 ev_stop (EV_A_ (W)w); 3906 ev_stop (EV_A_ (W)w);
3907
3908 EV_FREQUENT_CHECK;
2031} 3909}
2032#endif 3910#endif
2033 3911
2034#if EV_IDLE_ENABLE 3912#if EV_IDLE_ENABLE
2035void 3913void
… …
2038 if (expect_false (ev_is_active (w))) 3916 if (expect_false (ev_is_active (w)))
2039 return; 3917 return;
2040 3918
2041 pri_adjust (EV_A_ (W)w); 3919 pri_adjust (EV_A_ (W)w);
2042 3920
3921 EV_FREQUENT_CHECK;
3922
2043 { 3923 {
2044 int active = ++idlecnt [ABSPRI (w)]; 3924 int active = ++idlecnt [ABSPRI (w)];
2045 3925
2046 ++idleall; 3926 ++idleall;
2047 ev_start (EV_A_ (W)w, active); 3927 ev_start (EV_A_ (W)w, active);
2048 3928
2049 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3929 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2050 idles [ABSPRI (w)][active - 1] = w; 3930 idles [ABSPRI (w)][active - 1] = w;
2051 } 3931 }
3932
3933 EV_FREQUENT_CHECK;
2052} 3934}
2053 3935
2054void 3936void
2055ev_idle_stop (EV_P_ ev_idle *w) 3937ev_idle_stop (EV_P_ ev_idle *w)
2056{ 3938{
2057 ev_clear_pending (EV_A_ (W)w); 3939 clear_pending (EV_A_ (W)w);
2058 if (expect_false (!ev_is_active (w))) 3940 if (expect_false (!ev_is_active (w)))
2059 return; 3941 return;
2060 3942
3943 EV_FREQUENT_CHECK;
3944
2061 { 3945 {
2062 int active = ((W)w)->active; 3946 int active = ev_active (w);
2063 3947
2064 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3948 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2065 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3949 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2066 3950
2067 ev_stop (EV_A_ (W)w); 3951 ev_stop (EV_A_ (W)w);
2068 --idleall; 3952 --idleall;
2069 } 3953 }
2070}
2071#endif
2072 3954
3955 EV_FREQUENT_CHECK;
3956}
3957#endif
3958
3959#if EV_PREPARE_ENABLE
2073void 3960void
2074ev_prepare_start (EV_P_ ev_prepare *w) 3961ev_prepare_start (EV_P_ ev_prepare *w)
2075{ 3962{
2076 if (expect_false (ev_is_active (w))) 3963 if (expect_false (ev_is_active (w)))
2077 return; 3964 return;
3965
3966 EV_FREQUENT_CHECK;
2078 3967
2079 ev_start (EV_A_ (W)w, ++preparecnt); 3968 ev_start (EV_A_ (W)w, ++preparecnt);
2080 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3969 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2081 prepares [preparecnt - 1] = w; 3970 prepares [preparecnt - 1] = w;
3971
3972 EV_FREQUENT_CHECK;
2082} 3973}
2083 3974
2084void 3975void
2085ev_prepare_stop (EV_P_ ev_prepare *w) 3976ev_prepare_stop (EV_P_ ev_prepare *w)
2086{ 3977{
2087 ev_clear_pending (EV_A_ (W)w); 3978 clear_pending (EV_A_ (W)w);
2088 if (expect_false (!ev_is_active (w))) 3979 if (expect_false (!ev_is_active (w)))
2089 return; 3980 return;
2090 3981
3982 EV_FREQUENT_CHECK;
3983
2091 { 3984 {
2092 int active = ((W)w)->active; 3985 int active = ev_active (w);
3986
2093 prepares [active - 1] = prepares [--preparecnt]; 3987 prepares [active - 1] = prepares [--preparecnt];
2094 ((W)prepares [active - 1])->active = active; 3988 ev_active (prepares [active - 1]) = active;
2095 } 3989 }
2096 3990
2097 ev_stop (EV_A_ (W)w); 3991 ev_stop (EV_A_ (W)w);
2098}
2099 3992
3993 EV_FREQUENT_CHECK;
3994}
3995#endif
3996
3997#if EV_CHECK_ENABLE
2100void 3998void
2101ev_check_start (EV_P_ ev_check *w) 3999ev_check_start (EV_P_ ev_check *w)
2102{ 4000{
2103 if (expect_false (ev_is_active (w))) 4001 if (expect_false (ev_is_active (w)))
2104 return; 4002 return;
4003
4004 EV_FREQUENT_CHECK;
2105 4005
2106 ev_start (EV_A_ (W)w, ++checkcnt); 4006 ev_start (EV_A_ (W)w, ++checkcnt);
2107 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4007 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2108 checks [checkcnt - 1] = w; 4008 checks [checkcnt - 1] = w;
4009
4010 EV_FREQUENT_CHECK;
2109} 4011}
2110 4012
2111void 4013void
2112ev_check_stop (EV_P_ ev_check *w) 4014ev_check_stop (EV_P_ ev_check *w)
2113{ 4015{
2114 ev_clear_pending (EV_A_ (W)w); 4016 clear_pending (EV_A_ (W)w);
2115 if (expect_false (!ev_is_active (w))) 4017 if (expect_false (!ev_is_active (w)))
2116 return; 4018 return;
2117 4019
4020 EV_FREQUENT_CHECK;
4021
2118 { 4022 {
2119 int active = ((W)w)->active; 4023 int active = ev_active (w);
4024
2120 checks [active - 1] = checks [--checkcnt]; 4025 checks [active - 1] = checks [--checkcnt];
2121 ((W)checks [active - 1])->active = active; 4026 ev_active (checks [active - 1]) = active;
2122 } 4027 }
2123 4028
2124 ev_stop (EV_A_ (W)w); 4029 ev_stop (EV_A_ (W)w);
4030
4031 EV_FREQUENT_CHECK;
2125} 4032}
4033#endif
2126 4034
2127#if EV_EMBED_ENABLE 4035#if EV_EMBED_ENABLE
2128void noinline 4036void noinline
2129ev_embed_sweep (EV_P_ ev_embed *w) 4037ev_embed_sweep (EV_P_ ev_embed *w)
2130{ 4038{
2131 ev_loop (w->loop, EVLOOP_NONBLOCK); 4039 ev_run (w->other, EVRUN_NOWAIT);
2132} 4040}
2133 4041
2134static void 4042static void
2135embed_cb (EV_P_ ev_io *io, int revents) 4043embed_io_cb (EV_P_ ev_io *io, int revents)
2136{ 4044{
2137 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4045 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2138 4046
2139 if (ev_cb (w)) 4047 if (ev_cb (w))
2140 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4048 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2141 else 4049 else
2142 ev_embed_sweep (loop, w); 4050 ev_run (w->other, EVRUN_NOWAIT);
2143} 4051}
4052
4053static void
4054embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4055{
4056 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4057
4058 {
4059 EV_P = w->other;
4060
4061 while (fdchangecnt)
4062 {
4063 fd_reify (EV_A);
4064 ev_run (EV_A_ EVRUN_NOWAIT);
4065 }
4066 }
4067}
4068
4069static void
4070embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4071{
4072 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4073
4074 ev_embed_stop (EV_A_ w);
4075
4076 {
4077 EV_P = w->other;
4078
4079 ev_loop_fork (EV_A);
4080 ev_run (EV_A_ EVRUN_NOWAIT);
4081 }
4082
4083 ev_embed_start (EV_A_ w);
4084}
4085
4086#if 0
4087static void
4088embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4089{
4090 ev_idle_stop (EV_A_ idle);
4091}
4092#endif
2144 4093
2145void 4094void
2146ev_embed_start (EV_P_ ev_embed *w) 4095ev_embed_start (EV_P_ ev_embed *w)
2147{ 4096{
2148 if (expect_false (ev_is_active (w))) 4097 if (expect_false (ev_is_active (w)))
2149 return; 4098 return;
2150 4099
2151 { 4100 {
2152 struct ev_loop *loop = w->loop; 4101 EV_P = w->other;
2153 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4102 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2154 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4103 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2155 } 4104 }
4105
4106 EV_FREQUENT_CHECK;
2156 4107
2157 ev_set_priority (&w->io, ev_priority (w)); 4108 ev_set_priority (&w->io, ev_priority (w));
2158 ev_io_start (EV_A_ &w->io); 4109 ev_io_start (EV_A_ &w->io);
2159 4110
4111 ev_prepare_init (&w->prepare, embed_prepare_cb);
4112 ev_set_priority (&w->prepare, EV_MINPRI);
4113 ev_prepare_start (EV_A_ &w->prepare);
4114
4115 ev_fork_init (&w->fork, embed_fork_cb);
4116 ev_fork_start (EV_A_ &w->fork);
4117
4118 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4119
2160 ev_start (EV_A_ (W)w, 1); 4120 ev_start (EV_A_ (W)w, 1);
4121
4122 EV_FREQUENT_CHECK;
2161} 4123}
2162 4124
2163void 4125void
2164ev_embed_stop (EV_P_ ev_embed *w) 4126ev_embed_stop (EV_P_ ev_embed *w)
2165{ 4127{
2166 ev_clear_pending (EV_A_ (W)w); 4128 clear_pending (EV_A_ (W)w);
2167 if (expect_false (!ev_is_active (w))) 4129 if (expect_false (!ev_is_active (w)))
2168 return; 4130 return;
2169 4131
4132 EV_FREQUENT_CHECK;
4133
2170 ev_io_stop (EV_A_ &w->io); 4134 ev_io_stop (EV_A_ &w->io);
4135 ev_prepare_stop (EV_A_ &w->prepare);
4136 ev_fork_stop (EV_A_ &w->fork);
2171 4137
2172 ev_stop (EV_A_ (W)w); 4138 ev_stop (EV_A_ (W)w);
4139
4140 EV_FREQUENT_CHECK;
2173} 4141}
2174#endif 4142#endif
2175 4143
2176#if EV_FORK_ENABLE 4144#if EV_FORK_ENABLE
2177void 4145void
2178ev_fork_start (EV_P_ ev_fork *w) 4146ev_fork_start (EV_P_ ev_fork *w)
2179{ 4147{
2180 if (expect_false (ev_is_active (w))) 4148 if (expect_false (ev_is_active (w)))
2181 return; 4149 return;
2182 4150
4151 EV_FREQUENT_CHECK;
4152
2183 ev_start (EV_A_ (W)w, ++forkcnt); 4153 ev_start (EV_A_ (W)w, ++forkcnt);
2184 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4154 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2185 forks [forkcnt - 1] = w; 4155 forks [forkcnt - 1] = w;
4156
4157 EV_FREQUENT_CHECK;
2186} 4158}
2187 4159
2188void 4160void
2189ev_fork_stop (EV_P_ ev_fork *w) 4161ev_fork_stop (EV_P_ ev_fork *w)
2190{ 4162{
2191 ev_clear_pending (EV_A_ (W)w); 4163 clear_pending (EV_A_ (W)w);
2192 if (expect_false (!ev_is_active (w))) 4164 if (expect_false (!ev_is_active (w)))
2193 return; 4165 return;
2194 4166
4167 EV_FREQUENT_CHECK;
4168
2195 { 4169 {
2196 int active = ((W)w)->active; 4170 int active = ev_active (w);
4171
2197 forks [active - 1] = forks [--forkcnt]; 4172 forks [active - 1] = forks [--forkcnt];
2198 ((W)forks [active - 1])->active = active; 4173 ev_active (forks [active - 1]) = active;
2199 } 4174 }
2200 4175
2201 ev_stop (EV_A_ (W)w); 4176 ev_stop (EV_A_ (W)w);
4177
4178 EV_FREQUENT_CHECK;
4179}
4180#endif
4181
4182#if EV_CLEANUP_ENABLE
4183void
4184ev_cleanup_start (EV_P_ ev_cleanup *w)
4185{
4186 if (expect_false (ev_is_active (w)))
4187 return;
4188
4189 EV_FREQUENT_CHECK;
4190
4191 ev_start (EV_A_ (W)w, ++cleanupcnt);
4192 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4193 cleanups [cleanupcnt - 1] = w;
4194
4195 /* cleanup watchers should never keep a refcount on the loop */
4196 ev_unref (EV_A);
4197 EV_FREQUENT_CHECK;
4198}
4199
4200void
4201ev_cleanup_stop (EV_P_ ev_cleanup *w)
4202{
4203 clear_pending (EV_A_ (W)w);
4204 if (expect_false (!ev_is_active (w)))
4205 return;
4206
4207 EV_FREQUENT_CHECK;
4208 ev_ref (EV_A);
4209
4210 {
4211 int active = ev_active (w);
4212
4213 cleanups [active - 1] = cleanups [--cleanupcnt];
4214 ev_active (cleanups [active - 1]) = active;
4215 }
4216
4217 ev_stop (EV_A_ (W)w);
4218
4219 EV_FREQUENT_CHECK;
4220}
4221#endif
4222
4223#if EV_ASYNC_ENABLE
4224void
4225ev_async_start (EV_P_ ev_async *w)
4226{
4227 if (expect_false (ev_is_active (w)))
4228 return;
4229
4230 w->sent = 0;
4231
4232 evpipe_init (EV_A);
4233
4234 EV_FREQUENT_CHECK;
4235
4236 ev_start (EV_A_ (W)w, ++asynccnt);
4237 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4238 asyncs [asynccnt - 1] = w;
4239
4240 EV_FREQUENT_CHECK;
4241}
4242
4243void
4244ev_async_stop (EV_P_ ev_async *w)
4245{
4246 clear_pending (EV_A_ (W)w);
4247 if (expect_false (!ev_is_active (w)))
4248 return;
4249
4250 EV_FREQUENT_CHECK;
4251
4252 {
4253 int active = ev_active (w);
4254
4255 asyncs [active - 1] = asyncs [--asynccnt];
4256 ev_active (asyncs [active - 1]) = active;
4257 }
4258
4259 ev_stop (EV_A_ (W)w);
4260
4261 EV_FREQUENT_CHECK;
4262}
4263
4264void
4265ev_async_send (EV_P_ ev_async *w)
4266{
4267 w->sent = 1;
4268 evpipe_write (EV_A_ &async_pending);
2202} 4269}
2203#endif 4270#endif
2204 4271
2205/*****************************************************************************/ 4272/*****************************************************************************/
2206 4273
… …
2216once_cb (EV_P_ struct ev_once *once, int revents) 4283once_cb (EV_P_ struct ev_once *once, int revents)
2217{ 4284{
2218 void (*cb)(int revents, void *arg) = once->cb; 4285 void (*cb)(int revents, void *arg) = once->cb;
2219 void *arg = once->arg; 4286 void *arg = once->arg;
2220 4287
2221 ev_io_stop (EV_A_ &once->io); 4288 ev_io_stop (EV_A_ &once->io);
2222 ev_timer_stop (EV_A_ &once->to); 4289 ev_timer_stop (EV_A_ &once->to);
2223 ev_free (once); 4290 ev_free (once);
2224 4291
2225 cb (revents, arg); 4292 cb (revents, arg);
2226} 4293}
2227 4294
2228static void 4295static void
2229once_cb_io (EV_P_ ev_io *w, int revents) 4296once_cb_io (EV_P_ ev_io *w, int revents)
2230{ 4297{
2231 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4298 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4299
4300 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2232} 4301}
2233 4302
2234static void 4303static void
2235once_cb_to (EV_P_ ev_timer *w, int revents) 4304once_cb_to (EV_P_ ev_timer *w, int revents)
2236{ 4305{
2237 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4306 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4307
4308 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2238} 4309}
2239 4310
2240void 4311void
2241ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4312ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2242{ 4313{
2243 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4314 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2244 4315
2245 if (expect_false (!once)) 4316 if (expect_false (!once))
2246 { 4317 {
2247 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4318 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2248 return; 4319 return;
2249 } 4320 }
2250 4321
2251 once->cb = cb; 4322 once->cb = cb;
2252 once->arg = arg; 4323 once->arg = arg;
… …
2264 ev_timer_set (&once->to, timeout, 0.); 4335 ev_timer_set (&once->to, timeout, 0.);
2265 ev_timer_start (EV_A_ &once->to); 4336 ev_timer_start (EV_A_ &once->to);
2266 } 4337 }
2267} 4338}
2268 4339
2269#ifdef __cplusplus 4340/*****************************************************************************/
2270} 4341
4342#if EV_WALK_ENABLE
4343void ecb_cold
4344ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4345{
4346 int i, j;
4347 ev_watcher_list *wl, *wn;
4348
4349 if (types & (EV_IO | EV_EMBED))
4350 for (i = 0; i < anfdmax; ++i)
4351 for (wl = anfds [i].head; wl; )
4352 {
4353 wn = wl->next;
4354
4355#if EV_EMBED_ENABLE
4356 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4357 {
4358 if (types & EV_EMBED)
4359 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4360 }
4361 else
4362#endif
4363#if EV_USE_INOTIFY
4364 if (ev_cb ((ev_io *)wl) == infy_cb)
4365 ;
4366 else
4367#endif
4368 if ((ev_io *)wl != &pipe_w)
4369 if (types & EV_IO)
4370 cb (EV_A_ EV_IO, wl);
4371
4372 wl = wn;
4373 }
4374
4375 if (types & (EV_TIMER | EV_STAT))
4376 for (i = timercnt + HEAP0; i-- > HEAP0; )
4377#if EV_STAT_ENABLE
4378 /*TODO: timer is not always active*/
4379 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4380 {
4381 if (types & EV_STAT)
4382 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4383 }
4384 else
4385#endif
4386 if (types & EV_TIMER)
4387 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4388
4389#if EV_PERIODIC_ENABLE
4390 if (types & EV_PERIODIC)
4391 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4392 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4393#endif
4394
4395#if EV_IDLE_ENABLE
4396 if (types & EV_IDLE)
4397 for (j = NUMPRI; j--; )
4398 for (i = idlecnt [j]; i--; )
4399 cb (EV_A_ EV_IDLE, idles [j][i]);
4400#endif
4401
4402#if EV_FORK_ENABLE
4403 if (types & EV_FORK)
4404 for (i = forkcnt; i--; )
4405 if (ev_cb (forks [i]) != embed_fork_cb)
4406 cb (EV_A_ EV_FORK, forks [i]);
4407#endif
4408
4409#if EV_ASYNC_ENABLE
4410 if (types & EV_ASYNC)
4411 for (i = asynccnt; i--; )
4412 cb (EV_A_ EV_ASYNC, asyncs [i]);
4413#endif
4414
4415#if EV_PREPARE_ENABLE
4416 if (types & EV_PREPARE)
4417 for (i = preparecnt; i--; )
4418# if EV_EMBED_ENABLE
4419 if (ev_cb (prepares [i]) != embed_prepare_cb)
2271#endif 4420# endif
4421 cb (EV_A_ EV_PREPARE, prepares [i]);
4422#endif
2272 4423
4424#if EV_CHECK_ENABLE
4425 if (types & EV_CHECK)
4426 for (i = checkcnt; i--; )
4427 cb (EV_A_ EV_CHECK, checks [i]);
4428#endif
4429
4430#if EV_SIGNAL_ENABLE
4431 if (types & EV_SIGNAL)
4432 for (i = 0; i < EV_NSIG - 1; ++i)
4433 for (wl = signals [i].head; wl; )
4434 {
4435 wn = wl->next;
4436 cb (EV_A_ EV_SIGNAL, wl);
4437 wl = wn;
4438 }
4439#endif
4440
4441#if EV_CHILD_ENABLE
4442 if (types & EV_CHILD)
4443 for (i = (EV_PID_HASHSIZE); i--; )
4444 for (wl = childs [i]; wl; )
4445 {
4446 wn = wl->next;
4447 cb (EV_A_ EV_CHILD, wl);
4448 wl = wn;
4449 }
4450#endif
4451/* EV_STAT 0x00001000 /* stat data changed */
4452/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4453}
4454#endif
4455
4456#if EV_MULTIPLICITY
4457 #include "ev_wrap.h"
4458#endif
4459

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines