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Comparing libev/ev.c (file contents):
Revision 1.186 by root, Sat Dec 15 23:14:38 2007 UTC vs.
Revision 1.409 by root, Sat Feb 4 15:17:34 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
… …
207#if !EV_STAT_ENABLE 382#if !EV_STAT_ENABLE
208# undef EV_USE_INOTIFY 383# undef EV_USE_INOTIFY
209# define EV_USE_INOTIFY 0 384# define EV_USE_INOTIFY 0
210#endif 385#endif
211 386
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
212#if EV_USE_INOTIFY 394#if EV_USE_INOTIFY
395# include <sys/statfs.h>
213# include <sys/inotify.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
214#endif 402#endif
215 403
216#if EV_SELECT_IS_WINSOCKET 404#if EV_SELECT_IS_WINSOCKET
217# include <winsock.h> 405# include <winsock.h>
218#endif 406#endif
219 407
408#if EV_USE_EVENTFD
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
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
423
424#if EV_USE_SIGNALFD
425/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
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};
444#endif
445
220/**/ 446/**/
221 447
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
222/* 454/*
223 * This is used to avoid floating point rounding problems. 455 * This is used to work around floating point rounding problems.
224 * It is added to ev_rt_now when scheduling periodics
225 * to ensure progress, time-wise, even when rounding
226 * errors are against us.
227 * This value is good at least till the year 4000. 456 * This value is good at least till the year 4000.
228 * Better solutions welcome.
229 */ 457 */
230#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 458#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
459/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
231 460
232#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) */
233#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) */
234/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
235 463
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;
236#if __GNUC__ >= 4 508 #if __GNUC__
237# define expect(expr,value) __builtin_expect ((expr),(value)) 509 typedef signed long long int64_t;
238# define noinline __attribute__ ((noinline)) 510 typedef unsigned long long uint64_t;
511 #else /* _MSC_VER || __BORLANDC__ */
512 typedef signed __int64 int64_t;
513 typedef unsigned __int64 uint64_t;
514 #endif
239#else 515#else
240# define expect(expr,value) (expr) 516 #include <inttypes.h>
241# define noinline
242# if __STDC_VERSION__ < 199901L
243# define inline
244# endif 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)))
245#endif 531 #endif
532#endif
246 533
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) || (__llvm__ && __GNUC__) || __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 #elif defined(__s390__) || defined(__s390x__)
566 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
567 #endif
568 #endif
569#endif
570
571#ifndef ECB_MEMORY_FENCE
572 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
573 #define ECB_MEMORY_FENCE __sync_synchronize ()
574 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
575 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
576 #elif _MSC_VER >= 1400 /* VC++ 2005 */
577 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
578 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
579 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
580 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
581 #elif defined(_WIN32)
582 #include <WinNT.h>
583 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
584 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
585 #include <mbarrier.h>
586 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
587 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
588 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
589 #endif
590#endif
591
592#ifndef ECB_MEMORY_FENCE
593 #if !ECB_AVOID_PTHREADS
594 /*
595 * if you get undefined symbol references to pthread_mutex_lock,
596 * or failure to find pthread.h, then you should implement
597 * the ECB_MEMORY_FENCE operations for your cpu/compiler
598 * OR provide pthread.h and link against the posix thread library
599 * of your system.
600 */
601 #include <pthread.h>
602 #define ECB_NEEDS_PTHREADS 1
603 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
604
605 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
606 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
607 #endif
608#endif
609
610#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
611 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
612#endif
613
614#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
615 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
616#endif
617
618/*****************************************************************************/
619
620#define ECB_C99 (__STDC_VERSION__ >= 199901L)
621
622#if __cplusplus
623 #define ecb_inline static inline
624#elif ECB_GCC_VERSION(2,5)
625 #define ecb_inline static __inline__
626#elif ECB_C99
627 #define ecb_inline static inline
628#else
629 #define ecb_inline static
630#endif
631
632#if ECB_GCC_VERSION(3,3)
633 #define ecb_restrict __restrict__
634#elif ECB_C99
635 #define ecb_restrict restrict
636#else
637 #define ecb_restrict
638#endif
639
640typedef int ecb_bool;
641
642#define ECB_CONCAT_(a, b) a ## b
643#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
644#define ECB_STRINGIFY_(a) # a
645#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
646
647#define ecb_function_ ecb_inline
648
649#if ECB_GCC_VERSION(3,1)
650 #define ecb_attribute(attrlist) __attribute__(attrlist)
651 #define ecb_is_constant(expr) __builtin_constant_p (expr)
652 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
653 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
654#else
655 #define ecb_attribute(attrlist)
656 #define ecb_is_constant(expr) 0
657 #define ecb_expect(expr,value) (expr)
658 #define ecb_prefetch(addr,rw,locality)
659#endif
660
661/* no emulation for ecb_decltype */
662#if ECB_GCC_VERSION(4,5)
663 #define ecb_decltype(x) __decltype(x)
664#elif ECB_GCC_VERSION(3,0)
665 #define ecb_decltype(x) __typeof(x)
666#endif
667
668#define ecb_noinline ecb_attribute ((__noinline__))
669#define ecb_noreturn ecb_attribute ((__noreturn__))
670#define ecb_unused ecb_attribute ((__unused__))
671#define ecb_const ecb_attribute ((__const__))
672#define ecb_pure ecb_attribute ((__pure__))
673
674#if ECB_GCC_VERSION(4,3)
675 #define ecb_artificial ecb_attribute ((__artificial__))
676 #define ecb_hot ecb_attribute ((__hot__))
677 #define ecb_cold ecb_attribute ((__cold__))
678#else
679 #define ecb_artificial
680 #define ecb_hot
681 #define ecb_cold
682#endif
683
684/* put around conditional expressions if you are very sure that the */
685/* expression is mostly true or mostly false. note that these return */
686/* booleans, not the expression. */
247#define expect_false(expr) expect ((expr) != 0, 0) 687#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
248#define expect_true(expr) expect ((expr) != 0, 1) 688#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
689/* for compatibility to the rest of the world */
690#define ecb_likely(expr) ecb_expect_true (expr)
691#define ecb_unlikely(expr) ecb_expect_false (expr)
692
693/* count trailing zero bits and count # of one bits */
694#if ECB_GCC_VERSION(3,4)
695 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
696 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
697 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
698 #define ecb_ctz32(x) __builtin_ctz (x)
699 #define ecb_ctz64(x) __builtin_ctzll (x)
700 #define ecb_popcount32(x) __builtin_popcount (x)
701 /* no popcountll */
702#else
703 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
704 ecb_function_ int
705 ecb_ctz32 (uint32_t x)
706 {
707 int r = 0;
708
709 x &= ~x + 1; /* this isolates the lowest bit */
710
711#if ECB_branchless_on_i386
712 r += !!(x & 0xaaaaaaaa) << 0;
713 r += !!(x & 0xcccccccc) << 1;
714 r += !!(x & 0xf0f0f0f0) << 2;
715 r += !!(x & 0xff00ff00) << 3;
716 r += !!(x & 0xffff0000) << 4;
717#else
718 if (x & 0xaaaaaaaa) r += 1;
719 if (x & 0xcccccccc) r += 2;
720 if (x & 0xf0f0f0f0) r += 4;
721 if (x & 0xff00ff00) r += 8;
722 if (x & 0xffff0000) r += 16;
723#endif
724
725 return r;
726 }
727
728 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
729 ecb_function_ int
730 ecb_ctz64 (uint64_t x)
731 {
732 int shift = x & 0xffffffffU ? 0 : 32;
733 return ecb_ctz32 (x >> shift) + shift;
734 }
735
736 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
737 ecb_function_ int
738 ecb_popcount32 (uint32_t x)
739 {
740 x -= (x >> 1) & 0x55555555;
741 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
742 x = ((x >> 4) + x) & 0x0f0f0f0f;
743 x *= 0x01010101;
744
745 return x >> 24;
746 }
747
748 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
749 ecb_function_ int ecb_ld32 (uint32_t x)
750 {
751 int r = 0;
752
753 if (x >> 16) { x >>= 16; r += 16; }
754 if (x >> 8) { x >>= 8; r += 8; }
755 if (x >> 4) { x >>= 4; r += 4; }
756 if (x >> 2) { x >>= 2; r += 2; }
757 if (x >> 1) { r += 1; }
758
759 return r;
760 }
761
762 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
763 ecb_function_ int ecb_ld64 (uint64_t x)
764 {
765 int r = 0;
766
767 if (x >> 32) { x >>= 32; r += 32; }
768
769 return r + ecb_ld32 (x);
770 }
771#endif
772
773ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
774ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
775{
776 return ( (x * 0x0802U & 0x22110U)
777 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
778}
779
780ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
781ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
782{
783 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
784 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
785 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
786 x = ( x >> 8 ) | ( x << 8);
787
788 return x;
789}
790
791ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
792ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
793{
794 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
795 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
796 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
797 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
798 x = ( x >> 16 ) | ( x << 16);
799
800 return x;
801}
802
803/* popcount64 is only available on 64 bit cpus as gcc builtin */
804/* so for this version we are lazy */
805ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
806ecb_function_ int
807ecb_popcount64 (uint64_t x)
808{
809 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
810}
811
812ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
813ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
814ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
815ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
816ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
817ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
818ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
819ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
820
821ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
822ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
823ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
824ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
825ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
826ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
827ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
828ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
829
830#if ECB_GCC_VERSION(4,3)
831 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
832 #define ecb_bswap32(x) __builtin_bswap32 (x)
833 #define ecb_bswap64(x) __builtin_bswap64 (x)
834#else
835 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
836 ecb_function_ uint16_t
837 ecb_bswap16 (uint16_t x)
838 {
839 return ecb_rotl16 (x, 8);
840 }
841
842 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
843 ecb_function_ uint32_t
844 ecb_bswap32 (uint32_t x)
845 {
846 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
847 }
848
849 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
850 ecb_function_ uint64_t
851 ecb_bswap64 (uint64_t x)
852 {
853 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
854 }
855#endif
856
857#if ECB_GCC_VERSION(4,5)
858 #define ecb_unreachable() __builtin_unreachable ()
859#else
860 /* this seems to work fine, but gcc always emits a warning for it :/ */
861 ecb_inline void ecb_unreachable (void) ecb_noreturn;
862 ecb_inline void ecb_unreachable (void) { }
863#endif
864
865/* try to tell the compiler that some condition is definitely true */
866#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
867
868ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
869ecb_inline unsigned char
870ecb_byteorder_helper (void)
871{
872 const uint32_t u = 0x11223344;
873 return *(unsigned char *)&u;
874}
875
876ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
877ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
878ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
879ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
880
881#if ECB_GCC_VERSION(3,0) || ECB_C99
882 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
883#else
884 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
885#endif
886
887#if __cplusplus
888 template<typename T>
889 static inline T ecb_div_rd (T val, T div)
890 {
891 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
892 }
893 template<typename T>
894 static inline T ecb_div_ru (T val, T div)
895 {
896 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
897 }
898#else
899 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
900 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
901#endif
902
903#if ecb_cplusplus_does_not_suck
904 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
905 template<typename T, int N>
906 static inline int ecb_array_length (const T (&arr)[N])
907 {
908 return N;
909 }
910#else
911 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
912#endif
913
914#endif
915
916/* ECB.H END */
917
918#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
919/* if your architecture doesn't need memory fences, e.g. because it is
920 * single-cpu/core, or if you use libev in a project that doesn't use libev
921 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
922 * libev, in which cases the memory fences become nops.
923 * alternatively, you can remove this #error and link against libpthread,
924 * which will then provide the memory fences.
925 */
926# error "memory fences not defined for your architecture, please report"
927#endif
928
929#ifndef ECB_MEMORY_FENCE
930# define ECB_MEMORY_FENCE do { } while (0)
931# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
932# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
933#endif
934
935#define expect_false(cond) ecb_expect_false (cond)
936#define expect_true(cond) ecb_expect_true (cond)
937#define noinline ecb_noinline
938
249#define inline_size static inline 939#define inline_size ecb_inline
250 940
251#if EV_MINIMAL 941#if EV_FEATURE_CODE
942# define inline_speed ecb_inline
943#else
252# define inline_speed static noinline 944# define inline_speed static noinline
945#endif
946
947#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
948
949#if EV_MINPRI == EV_MAXPRI
950# define ABSPRI(w) (((W)w), 0)
253#else 951#else
254# define inline_speed static inline
255#endif
256
257#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
258#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 952# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
953#endif
259 954
260#define EMPTY /* required for microsofts broken pseudo-c compiler */ 955#define EMPTY /* required for microsofts broken pseudo-c compiler */
261#define EMPTY2(a,b) /* used to suppress some warnings */ 956#define EMPTY2(a,b) /* used to suppress some warnings */
262 957
263typedef ev_watcher *W; 958typedef ev_watcher *W;
264typedef ev_watcher_list *WL; 959typedef ev_watcher_list *WL;
265typedef ev_watcher_time *WT; 960typedef ev_watcher_time *WT;
266 961
962#define ev_active(w) ((W)(w))->active
963#define ev_at(w) ((WT)(w))->at
964
965#if EV_USE_REALTIME
966/* sig_atomic_t is used to avoid per-thread variables or locking but still */
967/* giving it a reasonably high chance of working on typical architectures */
968static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
969#endif
970
971#if EV_USE_MONOTONIC
267static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 972static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
973#endif
974
975#ifndef EV_FD_TO_WIN32_HANDLE
976# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
977#endif
978#ifndef EV_WIN32_HANDLE_TO_FD
979# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
980#endif
981#ifndef EV_WIN32_CLOSE_FD
982# define EV_WIN32_CLOSE_FD(fd) close (fd)
983#endif
268 984
269#ifdef _WIN32 985#ifdef _WIN32
270# include "ev_win32.c" 986# include "ev_win32.c"
271#endif 987#endif
272 988
273/*****************************************************************************/ 989/*****************************************************************************/
274 990
991/* define a suitable floor function (only used by periodics atm) */
992
993#if EV_USE_FLOOR
994# include <math.h>
995# define ev_floor(v) floor (v)
996#else
997
998#include <float.h>
999
1000/* a floor() replacement function, should be independent of ev_tstamp type */
1001static ev_tstamp noinline
1002ev_floor (ev_tstamp v)
1003{
1004 /* the choice of shift factor is not terribly important */
1005#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1006 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1007#else
1008 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1009#endif
1010
1011 /* argument too large for an unsigned long? */
1012 if (expect_false (v >= shift))
1013 {
1014 ev_tstamp f;
1015
1016 if (v == v - 1.)
1017 return v; /* very large number */
1018
1019 f = shift * ev_floor (v * (1. / shift));
1020 return f + ev_floor (v - f);
1021 }
1022
1023 /* special treatment for negative args? */
1024 if (expect_false (v < 0.))
1025 {
1026 ev_tstamp f = -ev_floor (-v);
1027
1028 return f - (f == v ? 0 : 1);
1029 }
1030
1031 /* fits into an unsigned long */
1032 return (unsigned long)v;
1033}
1034
1035#endif
1036
1037/*****************************************************************************/
1038
1039#ifdef __linux
1040# include <sys/utsname.h>
1041#endif
1042
1043static unsigned int noinline ecb_cold
1044ev_linux_version (void)
1045{
1046#ifdef __linux
1047 unsigned int v = 0;
1048 struct utsname buf;
1049 int i;
1050 char *p = buf.release;
1051
1052 if (uname (&buf))
1053 return 0;
1054
1055 for (i = 3+1; --i; )
1056 {
1057 unsigned int c = 0;
1058
1059 for (;;)
1060 {
1061 if (*p >= '0' && *p <= '9')
1062 c = c * 10 + *p++ - '0';
1063 else
1064 {
1065 p += *p == '.';
1066 break;
1067 }
1068 }
1069
1070 v = (v << 8) | c;
1071 }
1072
1073 return v;
1074#else
1075 return 0;
1076#endif
1077}
1078
1079/*****************************************************************************/
1080
1081#if EV_AVOID_STDIO
1082static void noinline ecb_cold
1083ev_printerr (const char *msg)
1084{
1085 write (STDERR_FILENO, msg, strlen (msg));
1086}
1087#endif
1088
275static void (*syserr_cb)(const char *msg); 1089static void (*syserr_cb)(const char *msg);
276 1090
277void 1091void ecb_cold
278ev_set_syserr_cb (void (*cb)(const char *msg)) 1092ev_set_syserr_cb (void (*cb)(const char *msg))
279{ 1093{
280 syserr_cb = cb; 1094 syserr_cb = cb;
281} 1095}
282 1096
283static void noinline 1097static void noinline ecb_cold
284syserr (const char *msg) 1098ev_syserr (const char *msg)
285{ 1099{
286 if (!msg) 1100 if (!msg)
287 msg = "(libev) system error"; 1101 msg = "(libev) system error";
288 1102
289 if (syserr_cb) 1103 if (syserr_cb)
290 syserr_cb (msg); 1104 syserr_cb (msg);
291 else 1105 else
292 { 1106 {
1107#if EV_AVOID_STDIO
1108 ev_printerr (msg);
1109 ev_printerr (": ");
1110 ev_printerr (strerror (errno));
1111 ev_printerr ("\n");
1112#else
293 perror (msg); 1113 perror (msg);
1114#endif
294 abort (); 1115 abort ();
295 } 1116 }
296} 1117}
297 1118
1119static void *
1120ev_realloc_emul (void *ptr, long size)
1121{
1122#if __GLIBC__
1123 return realloc (ptr, size);
1124#else
1125 /* some systems, notably openbsd and darwin, fail to properly
1126 * implement realloc (x, 0) (as required by both ansi c-89 and
1127 * the single unix specification, so work around them here.
1128 */
1129
1130 if (size)
1131 return realloc (ptr, size);
1132
1133 free (ptr);
1134 return 0;
1135#endif
1136}
1137
298static void *(*alloc)(void *ptr, long size); 1138static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
299 1139
300void 1140void ecb_cold
301ev_set_allocator (void *(*cb)(void *ptr, long size)) 1141ev_set_allocator (void *(*cb)(void *ptr, long size))
302{ 1142{
303 alloc = cb; 1143 alloc = cb;
304} 1144}
305 1145
306inline_speed void * 1146inline_speed void *
307ev_realloc (void *ptr, long size) 1147ev_realloc (void *ptr, long size)
308{ 1148{
309 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1149 ptr = alloc (ptr, size);
310 1150
311 if (!ptr && size) 1151 if (!ptr && size)
312 { 1152 {
1153#if EV_AVOID_STDIO
1154 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1155#else
313 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1156 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1157#endif
314 abort (); 1158 abort ();
315 } 1159 }
316 1160
317 return ptr; 1161 return ptr;
318} 1162}
… …
320#define ev_malloc(size) ev_realloc (0, (size)) 1164#define ev_malloc(size) ev_realloc (0, (size))
321#define ev_free(ptr) ev_realloc ((ptr), 0) 1165#define ev_free(ptr) ev_realloc ((ptr), 0)
322 1166
323/*****************************************************************************/ 1167/*****************************************************************************/
324 1168
1169/* set in reify when reification needed */
1170#define EV_ANFD_REIFY 1
1171
1172/* file descriptor info structure */
325typedef struct 1173typedef struct
326{ 1174{
327 WL head; 1175 WL head;
328 unsigned char events; 1176 unsigned char events; /* the events watched for */
1177 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1178 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
329 unsigned char reify; 1179 unsigned char unused;
1180#if EV_USE_EPOLL
1181 unsigned int egen; /* generation counter to counter epoll bugs */
1182#endif
330#if EV_SELECT_IS_WINSOCKET 1183#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
331 SOCKET handle; 1184 SOCKET handle;
332#endif 1185#endif
1186#if EV_USE_IOCP
1187 OVERLAPPED or, ow;
1188#endif
333} ANFD; 1189} ANFD;
334 1190
1191/* stores the pending event set for a given watcher */
335typedef struct 1192typedef struct
336{ 1193{
337 W w; 1194 W w;
338 int events; 1195 int events; /* the pending event set for the given watcher */
339} ANPENDING; 1196} ANPENDING;
340 1197
341#if EV_USE_INOTIFY 1198#if EV_USE_INOTIFY
1199/* hash table entry per inotify-id */
342typedef struct 1200typedef struct
343{ 1201{
344 WL head; 1202 WL head;
345} ANFS; 1203} ANFS;
1204#endif
1205
1206/* Heap Entry */
1207#if EV_HEAP_CACHE_AT
1208 /* a heap element */
1209 typedef struct {
1210 ev_tstamp at;
1211 WT w;
1212 } ANHE;
1213
1214 #define ANHE_w(he) (he).w /* access watcher, read-write */
1215 #define ANHE_at(he) (he).at /* access cached at, read-only */
1216 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1217#else
1218 /* a heap element */
1219 typedef WT ANHE;
1220
1221 #define ANHE_w(he) (he)
1222 #define ANHE_at(he) (he)->at
1223 #define ANHE_at_cache(he)
346#endif 1224#endif
347 1225
348#if EV_MULTIPLICITY 1226#if EV_MULTIPLICITY
349 1227
350 struct ev_loop 1228 struct ev_loop
… …
356 #undef VAR 1234 #undef VAR
357 }; 1235 };
358 #include "ev_wrap.h" 1236 #include "ev_wrap.h"
359 1237
360 static struct ev_loop default_loop_struct; 1238 static struct ev_loop default_loop_struct;
361 struct ev_loop *ev_default_loop_ptr; 1239 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
362 1240
363#else 1241#else
364 1242
365 ev_tstamp ev_rt_now; 1243 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
366 #define VAR(name,decl) static decl; 1244 #define VAR(name,decl) static decl;
367 #include "ev_vars.h" 1245 #include "ev_vars.h"
368 #undef VAR 1246 #undef VAR
369 1247
370 static int ev_default_loop_ptr; 1248 static int ev_default_loop_ptr;
371 1249
372#endif 1250#endif
373 1251
1252#if EV_FEATURE_API
1253# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1254# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1255# define EV_INVOKE_PENDING invoke_cb (EV_A)
1256#else
1257# define EV_RELEASE_CB (void)0
1258# define EV_ACQUIRE_CB (void)0
1259# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1260#endif
1261
1262#define EVBREAK_RECURSE 0x80
1263
374/*****************************************************************************/ 1264/*****************************************************************************/
375 1265
1266#ifndef EV_HAVE_EV_TIME
376ev_tstamp 1267ev_tstamp
377ev_time (void) 1268ev_time (void)
378{ 1269{
379#if EV_USE_REALTIME 1270#if EV_USE_REALTIME
1271 if (expect_true (have_realtime))
1272 {
380 struct timespec ts; 1273 struct timespec ts;
381 clock_gettime (CLOCK_REALTIME, &ts); 1274 clock_gettime (CLOCK_REALTIME, &ts);
382 return ts.tv_sec + ts.tv_nsec * 1e-9; 1275 return ts.tv_sec + ts.tv_nsec * 1e-9;
383#else 1276 }
1277#endif
1278
384 struct timeval tv; 1279 struct timeval tv;
385 gettimeofday (&tv, 0); 1280 gettimeofday (&tv, 0);
386 return tv.tv_sec + tv.tv_usec * 1e-6; 1281 return tv.tv_sec + tv.tv_usec * 1e-6;
387#endif
388} 1282}
1283#endif
389 1284
390ev_tstamp inline_size 1285inline_size ev_tstamp
391get_clock (void) 1286get_clock (void)
392{ 1287{
393#if EV_USE_MONOTONIC 1288#if EV_USE_MONOTONIC
394 if (expect_true (have_monotonic)) 1289 if (expect_true (have_monotonic))
395 { 1290 {
… …
408{ 1303{
409 return ev_rt_now; 1304 return ev_rt_now;
410} 1305}
411#endif 1306#endif
412 1307
413int inline_size 1308void
1309ev_sleep (ev_tstamp delay)
1310{
1311 if (delay > 0.)
1312 {
1313#if EV_USE_NANOSLEEP
1314 struct timespec ts;
1315
1316 EV_TS_SET (ts, delay);
1317 nanosleep (&ts, 0);
1318#elif defined(_WIN32)
1319 Sleep ((unsigned long)(delay * 1e3));
1320#else
1321 struct timeval tv;
1322
1323 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1324 /* something not guaranteed by newer posix versions, but guaranteed */
1325 /* by older ones */
1326 EV_TV_SET (tv, delay);
1327 select (0, 0, 0, 0, &tv);
1328#endif
1329 }
1330}
1331
1332/*****************************************************************************/
1333
1334#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1335
1336/* find a suitable new size for the given array, */
1337/* hopefully by rounding to a nice-to-malloc size */
1338inline_size int
414array_nextsize (int elem, int cur, int cnt) 1339array_nextsize (int elem, int cur, int cnt)
415{ 1340{
416 int ncur = cur + 1; 1341 int ncur = cur + 1;
417 1342
418 do 1343 do
419 ncur <<= 1; 1344 ncur <<= 1;
420 while (cnt > ncur); 1345 while (cnt > ncur);
421 1346
422 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1347 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
423 if (elem * ncur > 4096) 1348 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
424 { 1349 {
425 ncur *= elem; 1350 ncur *= elem;
426 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1351 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
427 ncur = ncur - sizeof (void *) * 4; 1352 ncur = ncur - sizeof (void *) * 4;
428 ncur /= elem; 1353 ncur /= elem;
429 } 1354 }
430 1355
431 return ncur; 1356 return ncur;
432} 1357}
433 1358
434static noinline void * 1359static void * noinline ecb_cold
435array_realloc (int elem, void *base, int *cur, int cnt) 1360array_realloc (int elem, void *base, int *cur, int cnt)
436{ 1361{
437 *cur = array_nextsize (elem, *cur, cnt); 1362 *cur = array_nextsize (elem, *cur, cnt);
438 return ev_realloc (base, elem * *cur); 1363 return ev_realloc (base, elem * *cur);
439} 1364}
1365
1366#define array_init_zero(base,count) \
1367 memset ((void *)(base), 0, sizeof (*(base)) * (count))
440 1368
441#define array_needsize(type,base,cur,cnt,init) \ 1369#define array_needsize(type,base,cur,cnt,init) \
442 if (expect_false ((cnt) > (cur))) \ 1370 if (expect_false ((cnt) > (cur))) \
443 { \ 1371 { \
444 int ocur_ = (cur); \ 1372 int ecb_unused ocur_ = (cur); \
445 (base) = (type *)array_realloc \ 1373 (base) = (type *)array_realloc \
446 (sizeof (type), (base), &(cur), (cnt)); \ 1374 (sizeof (type), (base), &(cur), (cnt)); \
447 init ((base) + (ocur_), (cur) - ocur_); \ 1375 init ((base) + (ocur_), (cur) - ocur_); \
448 } 1376 }
449 1377
… …
456 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1384 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
457 } 1385 }
458#endif 1386#endif
459 1387
460#define array_free(stem, idx) \ 1388#define array_free(stem, idx) \
461 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1389 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
462 1390
463/*****************************************************************************/ 1391/*****************************************************************************/
1392
1393/* dummy callback for pending events */
1394static void noinline
1395pendingcb (EV_P_ ev_prepare *w, int revents)
1396{
1397}
464 1398
465void noinline 1399void noinline
466ev_feed_event (EV_P_ void *w, int revents) 1400ev_feed_event (EV_P_ void *w, int revents)
467{ 1401{
468 W w_ = (W)w; 1402 W w_ = (W)w;
… …
477 pendings [pri][w_->pending - 1].w = w_; 1411 pendings [pri][w_->pending - 1].w = w_;
478 pendings [pri][w_->pending - 1].events = revents; 1412 pendings [pri][w_->pending - 1].events = revents;
479 } 1413 }
480} 1414}
481 1415
482void inline_speed 1416inline_speed void
1417feed_reverse (EV_P_ W w)
1418{
1419 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1420 rfeeds [rfeedcnt++] = w;
1421}
1422
1423inline_size void
1424feed_reverse_done (EV_P_ int revents)
1425{
1426 do
1427 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1428 while (rfeedcnt);
1429}
1430
1431inline_speed void
483queue_events (EV_P_ W *events, int eventcnt, int type) 1432queue_events (EV_P_ W *events, int eventcnt, int type)
484{ 1433{
485 int i; 1434 int i;
486 1435
487 for (i = 0; i < eventcnt; ++i) 1436 for (i = 0; i < eventcnt; ++i)
488 ev_feed_event (EV_A_ events [i], type); 1437 ev_feed_event (EV_A_ events [i], type);
489} 1438}
490 1439
491/*****************************************************************************/ 1440/*****************************************************************************/
492 1441
493void inline_size 1442inline_speed void
494anfds_init (ANFD *base, int count)
495{
496 while (count--)
497 {
498 base->head = 0;
499 base->events = EV_NONE;
500 base->reify = 0;
501
502 ++base;
503 }
504}
505
506void inline_speed
507fd_event (EV_P_ int fd, int revents) 1443fd_event_nocheck (EV_P_ int fd, int revents)
508{ 1444{
509 ANFD *anfd = anfds + fd; 1445 ANFD *anfd = anfds + fd;
510 ev_io *w; 1446 ev_io *w;
511 1447
512 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1448 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
516 if (ev) 1452 if (ev)
517 ev_feed_event (EV_A_ (W)w, ev); 1453 ev_feed_event (EV_A_ (W)w, ev);
518 } 1454 }
519} 1455}
520 1456
1457/* do not submit kernel events for fds that have reify set */
1458/* because that means they changed while we were polling for new events */
1459inline_speed void
1460fd_event (EV_P_ int fd, int revents)
1461{
1462 ANFD *anfd = anfds + fd;
1463
1464 if (expect_true (!anfd->reify))
1465 fd_event_nocheck (EV_A_ fd, revents);
1466}
1467
521void 1468void
522ev_feed_fd_event (EV_P_ int fd, int revents) 1469ev_feed_fd_event (EV_P_ int fd, int revents)
523{ 1470{
524 if (fd >= 0 && fd < anfdmax) 1471 if (fd >= 0 && fd < anfdmax)
525 fd_event (EV_A_ fd, revents); 1472 fd_event_nocheck (EV_A_ fd, revents);
526} 1473}
527 1474
528void inline_size 1475/* make sure the external fd watch events are in-sync */
1476/* with the kernel/libev internal state */
1477inline_size void
529fd_reify (EV_P) 1478fd_reify (EV_P)
530{ 1479{
531 int i; 1480 int i;
1481
1482#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1483 for (i = 0; i < fdchangecnt; ++i)
1484 {
1485 int fd = fdchanges [i];
1486 ANFD *anfd = anfds + fd;
1487
1488 if (anfd->reify & EV__IOFDSET && anfd->head)
1489 {
1490 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1491
1492 if (handle != anfd->handle)
1493 {
1494 unsigned long arg;
1495
1496 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1497
1498 /* handle changed, but fd didn't - we need to do it in two steps */
1499 backend_modify (EV_A_ fd, anfd->events, 0);
1500 anfd->events = 0;
1501 anfd->handle = handle;
1502 }
1503 }
1504 }
1505#endif
532 1506
533 for (i = 0; i < fdchangecnt; ++i) 1507 for (i = 0; i < fdchangecnt; ++i)
534 { 1508 {
535 int fd = fdchanges [i]; 1509 int fd = fdchanges [i];
536 ANFD *anfd = anfds + fd; 1510 ANFD *anfd = anfds + fd;
537 ev_io *w; 1511 ev_io *w;
538 1512
539 unsigned char events = 0; 1513 unsigned char o_events = anfd->events;
1514 unsigned char o_reify = anfd->reify;
540 1515
541 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1516 anfd->reify = 0;
542 events |= (unsigned char)w->events;
543 1517
544#if EV_SELECT_IS_WINSOCKET 1518 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
545 if (events)
546 { 1519 {
547 unsigned long argp; 1520 anfd->events = 0;
548 anfd->handle = _get_osfhandle (fd); 1521
549 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1522 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1523 anfd->events |= (unsigned char)w->events;
1524
1525 if (o_events != anfd->events)
1526 o_reify = EV__IOFDSET; /* actually |= */
550 } 1527 }
551#endif
552 1528
553 { 1529 if (o_reify & EV__IOFDSET)
554 unsigned char o_events = anfd->events;
555 unsigned char o_reify = anfd->reify;
556
557 anfd->reify = 0;
558 anfd->events = events;
559
560 if (o_events != events || o_reify & EV_IOFDSET)
561 backend_modify (EV_A_ fd, o_events, events); 1530 backend_modify (EV_A_ fd, o_events, anfd->events);
562 }
563 } 1531 }
564 1532
565 fdchangecnt = 0; 1533 fdchangecnt = 0;
566} 1534}
567 1535
568void inline_size 1536/* something about the given fd changed */
1537inline_size void
569fd_change (EV_P_ int fd, int flags) 1538fd_change (EV_P_ int fd, int flags)
570{ 1539{
571 unsigned char reify = anfds [fd].reify; 1540 unsigned char reify = anfds [fd].reify;
572 anfds [fd].reify |= flags; 1541 anfds [fd].reify |= flags;
573 1542
… …
577 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1546 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
578 fdchanges [fdchangecnt - 1] = fd; 1547 fdchanges [fdchangecnt - 1] = fd;
579 } 1548 }
580} 1549}
581 1550
582void inline_speed 1551/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1552inline_speed void ecb_cold
583fd_kill (EV_P_ int fd) 1553fd_kill (EV_P_ int fd)
584{ 1554{
585 ev_io *w; 1555 ev_io *w;
586 1556
587 while ((w = (ev_io *)anfds [fd].head)) 1557 while ((w = (ev_io *)anfds [fd].head))
… …
589 ev_io_stop (EV_A_ w); 1559 ev_io_stop (EV_A_ w);
590 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1560 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
591 } 1561 }
592} 1562}
593 1563
594int inline_size 1564/* check whether the given fd is actually valid, for error recovery */
1565inline_size int ecb_cold
595fd_valid (int fd) 1566fd_valid (int fd)
596{ 1567{
597#ifdef _WIN32 1568#ifdef _WIN32
598 return _get_osfhandle (fd) != -1; 1569 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
599#else 1570#else
600 return fcntl (fd, F_GETFD) != -1; 1571 return fcntl (fd, F_GETFD) != -1;
601#endif 1572#endif
602} 1573}
603 1574
604/* called on EBADF to verify fds */ 1575/* called on EBADF to verify fds */
605static void noinline 1576static void noinline ecb_cold
606fd_ebadf (EV_P) 1577fd_ebadf (EV_P)
607{ 1578{
608 int fd; 1579 int fd;
609 1580
610 for (fd = 0; fd < anfdmax; ++fd) 1581 for (fd = 0; fd < anfdmax; ++fd)
611 if (anfds [fd].events) 1582 if (anfds [fd].events)
612 if (!fd_valid (fd) == -1 && errno == EBADF) 1583 if (!fd_valid (fd) && errno == EBADF)
613 fd_kill (EV_A_ fd); 1584 fd_kill (EV_A_ fd);
614} 1585}
615 1586
616/* called on ENOMEM in select/poll to kill some fds and retry */ 1587/* called on ENOMEM in select/poll to kill some fds and retry */
617static void noinline 1588static void noinline ecb_cold
618fd_enomem (EV_P) 1589fd_enomem (EV_P)
619{ 1590{
620 int fd; 1591 int fd;
621 1592
622 for (fd = anfdmax; fd--; ) 1593 for (fd = anfdmax; fd--; )
623 if (anfds [fd].events) 1594 if (anfds [fd].events)
624 { 1595 {
625 fd_kill (EV_A_ fd); 1596 fd_kill (EV_A_ fd);
626 return; 1597 break;
627 } 1598 }
628} 1599}
629 1600
630/* usually called after fork if backend needs to re-arm all fds from scratch */ 1601/* usually called after fork if backend needs to re-arm all fds from scratch */
631static void noinline 1602static void noinline
… …
635 1606
636 for (fd = 0; fd < anfdmax; ++fd) 1607 for (fd = 0; fd < anfdmax; ++fd)
637 if (anfds [fd].events) 1608 if (anfds [fd].events)
638 { 1609 {
639 anfds [fd].events = 0; 1610 anfds [fd].events = 0;
1611 anfds [fd].emask = 0;
640 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1612 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
641 } 1613 }
642} 1614}
643 1615
644/*****************************************************************************/ 1616/* used to prepare libev internal fd's */
645 1617/* this is not fork-safe */
646void inline_speed 1618inline_speed void
647upheap (WT *heap, int k)
648{
649 WT w = heap [k];
650
651 while (k)
652 {
653 int p = (k - 1) >> 1;
654
655 if (heap [p]->at <= w->at)
656 break;
657
658 heap [k] = heap [p];
659 ((W)heap [k])->active = k + 1;
660 k = p;
661 }
662
663 heap [k] = w;
664 ((W)heap [k])->active = k + 1;
665}
666
667void inline_speed
668downheap (WT *heap, int N, int k)
669{
670 WT w = heap [k];
671
672 for (;;)
673 {
674 int c = (k << 1) + 1;
675
676 if (c >= N)
677 break;
678
679 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
680 ? 1 : 0;
681
682 if (w->at <= heap [c]->at)
683 break;
684
685 heap [k] = heap [c];
686 ((W)heap [k])->active = k + 1;
687
688 k = c;
689 }
690
691 heap [k] = w;
692 ((W)heap [k])->active = k + 1;
693}
694
695void inline_size
696adjustheap (WT *heap, int N, int k)
697{
698 upheap (heap, k);
699 downheap (heap, N, k);
700}
701
702/*****************************************************************************/
703
704typedef struct
705{
706 WL head;
707 sig_atomic_t volatile gotsig;
708} ANSIG;
709
710static ANSIG *signals;
711static int signalmax;
712
713static int sigpipe [2];
714static sig_atomic_t volatile gotsig;
715static ev_io sigev;
716
717void inline_size
718signals_init (ANSIG *base, int count)
719{
720 while (count--)
721 {
722 base->head = 0;
723 base->gotsig = 0;
724
725 ++base;
726 }
727}
728
729static void
730sighandler (int signum)
731{
732#if _WIN32
733 signal (signum, sighandler);
734#endif
735
736 signals [signum - 1].gotsig = 1;
737
738 if (!gotsig)
739 {
740 int old_errno = errno;
741 gotsig = 1;
742 write (sigpipe [1], &signum, 1);
743 errno = old_errno;
744 }
745}
746
747void noinline
748ev_feed_signal_event (EV_P_ int signum)
749{
750 WL w;
751
752#if EV_MULTIPLICITY
753 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
754#endif
755
756 --signum;
757
758 if (signum < 0 || signum >= signalmax)
759 return;
760
761 signals [signum].gotsig = 0;
762
763 for (w = signals [signum].head; w; w = w->next)
764 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
765}
766
767static void
768sigcb (EV_P_ ev_io *iow, int revents)
769{
770 int signum;
771
772 read (sigpipe [0], &revents, 1);
773 gotsig = 0;
774
775 for (signum = signalmax; signum--; )
776 if (signals [signum].gotsig)
777 ev_feed_signal_event (EV_A_ signum + 1);
778}
779
780void inline_speed
781fd_intern (int fd) 1619fd_intern (int fd)
782{ 1620{
783#ifdef _WIN32 1621#ifdef _WIN32
784 int arg = 1; 1622 unsigned long arg = 1;
785 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1623 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
786#else 1624#else
787 fcntl (fd, F_SETFD, FD_CLOEXEC); 1625 fcntl (fd, F_SETFD, FD_CLOEXEC);
788 fcntl (fd, F_SETFL, O_NONBLOCK); 1626 fcntl (fd, F_SETFL, O_NONBLOCK);
789#endif 1627#endif
790} 1628}
791 1629
792static void noinline
793siginit (EV_P)
794{
795 fd_intern (sigpipe [0]);
796 fd_intern (sigpipe [1]);
797
798 ev_io_set (&sigev, sigpipe [0], EV_READ);
799 ev_io_start (EV_A_ &sigev);
800 ev_unref (EV_A); /* child watcher should not keep loop alive */
801}
802
803/*****************************************************************************/ 1630/*****************************************************************************/
804 1631
1632/*
1633 * the heap functions want a real array index. array index 0 is guaranteed to not
1634 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1635 * the branching factor of the d-tree.
1636 */
1637
1638/*
1639 * at the moment we allow libev the luxury of two heaps,
1640 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1641 * which is more cache-efficient.
1642 * the difference is about 5% with 50000+ watchers.
1643 */
1644#if EV_USE_4HEAP
1645
1646#define DHEAP 4
1647#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1648#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1649#define UPHEAP_DONE(p,k) ((p) == (k))
1650
1651/* away from the root */
1652inline_speed void
1653downheap (ANHE *heap, int N, int k)
1654{
1655 ANHE he = heap [k];
1656 ANHE *E = heap + N + HEAP0;
1657
1658 for (;;)
1659 {
1660 ev_tstamp minat;
1661 ANHE *minpos;
1662 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1663
1664 /* find minimum child */
1665 if (expect_true (pos + DHEAP - 1 < E))
1666 {
1667 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1668 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1669 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1670 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1671 }
1672 else if (pos < E)
1673 {
1674 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1675 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1676 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1677 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1678 }
1679 else
1680 break;
1681
1682 if (ANHE_at (he) <= minat)
1683 break;
1684
1685 heap [k] = *minpos;
1686 ev_active (ANHE_w (*minpos)) = k;
1687
1688 k = minpos - heap;
1689 }
1690
1691 heap [k] = he;
1692 ev_active (ANHE_w (he)) = k;
1693}
1694
1695#else /* 4HEAP */
1696
1697#define HEAP0 1
1698#define HPARENT(k) ((k) >> 1)
1699#define UPHEAP_DONE(p,k) (!(p))
1700
1701/* away from the root */
1702inline_speed void
1703downheap (ANHE *heap, int N, int k)
1704{
1705 ANHE he = heap [k];
1706
1707 for (;;)
1708 {
1709 int c = k << 1;
1710
1711 if (c >= N + HEAP0)
1712 break;
1713
1714 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1715 ? 1 : 0;
1716
1717 if (ANHE_at (he) <= ANHE_at (heap [c]))
1718 break;
1719
1720 heap [k] = heap [c];
1721 ev_active (ANHE_w (heap [k])) = k;
1722
1723 k = c;
1724 }
1725
1726 heap [k] = he;
1727 ev_active (ANHE_w (he)) = k;
1728}
1729#endif
1730
1731/* towards the root */
1732inline_speed void
1733upheap (ANHE *heap, int k)
1734{
1735 ANHE he = heap [k];
1736
1737 for (;;)
1738 {
1739 int p = HPARENT (k);
1740
1741 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1742 break;
1743
1744 heap [k] = heap [p];
1745 ev_active (ANHE_w (heap [k])) = k;
1746 k = p;
1747 }
1748
1749 heap [k] = he;
1750 ev_active (ANHE_w (he)) = k;
1751}
1752
1753/* move an element suitably so it is in a correct place */
1754inline_size void
1755adjustheap (ANHE *heap, int N, int k)
1756{
1757 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1758 upheap (heap, k);
1759 else
1760 downheap (heap, N, k);
1761}
1762
1763/* rebuild the heap: this function is used only once and executed rarely */
1764inline_size void
1765reheap (ANHE *heap, int N)
1766{
1767 int i;
1768
1769 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1770 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1771 for (i = 0; i < N; ++i)
1772 upheap (heap, i + HEAP0);
1773}
1774
1775/*****************************************************************************/
1776
1777/* associate signal watchers to a signal signal */
1778typedef struct
1779{
1780 EV_ATOMIC_T pending;
1781#if EV_MULTIPLICITY
1782 EV_P;
1783#endif
1784 WL head;
1785} ANSIG;
1786
1787static ANSIG signals [EV_NSIG - 1];
1788
1789/*****************************************************************************/
1790
1791#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1792
1793static void noinline ecb_cold
1794evpipe_init (EV_P)
1795{
1796 if (!ev_is_active (&pipe_w))
1797 {
1798# if EV_USE_EVENTFD
1799 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1800 if (evfd < 0 && errno == EINVAL)
1801 evfd = eventfd (0, 0);
1802
1803 if (evfd >= 0)
1804 {
1805 evpipe [0] = -1;
1806 fd_intern (evfd); /* doing it twice doesn't hurt */
1807 ev_io_set (&pipe_w, evfd, EV_READ);
1808 }
1809 else
1810# endif
1811 {
1812 while (pipe (evpipe))
1813 ev_syserr ("(libev) error creating signal/async pipe");
1814
1815 fd_intern (evpipe [0]);
1816 fd_intern (evpipe [1]);
1817 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1818 }
1819
1820 ev_io_start (EV_A_ &pipe_w);
1821 ev_unref (EV_A); /* watcher should not keep loop alive */
1822 }
1823}
1824
1825inline_speed void
1826evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1827{
1828 if (expect_true (*flag))
1829 return;
1830
1831 *flag = 1;
1832
1833 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1834
1835 pipe_write_skipped = 1;
1836
1837 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1838
1839 if (pipe_write_wanted)
1840 {
1841 int old_errno;
1842
1843 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1844
1845 old_errno = errno; /* save errno because write will clobber it */
1846
1847#if EV_USE_EVENTFD
1848 if (evfd >= 0)
1849 {
1850 uint64_t counter = 1;
1851 write (evfd, &counter, sizeof (uint64_t));
1852 }
1853 else
1854#endif
1855 {
1856 /* win32 people keep sending patches that change this write() to send() */
1857 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1858 /* so when you think this write should be a send instead, please find out */
1859 /* where your send() is from - it's definitely not the microsoft send, and */
1860 /* tell me. thank you. */
1861 write (evpipe [1], &(evpipe [1]), 1);
1862 }
1863
1864 errno = old_errno;
1865 }
1866}
1867
1868/* called whenever the libev signal pipe */
1869/* got some events (signal, async) */
1870static void
1871pipecb (EV_P_ ev_io *iow, int revents)
1872{
1873 int i;
1874
1875 if (revents & EV_READ)
1876 {
1877#if EV_USE_EVENTFD
1878 if (evfd >= 0)
1879 {
1880 uint64_t counter;
1881 read (evfd, &counter, sizeof (uint64_t));
1882 }
1883 else
1884#endif
1885 {
1886 char dummy;
1887 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1888 read (evpipe [0], &dummy, 1);
1889 }
1890 }
1891
1892 pipe_write_skipped = 0;
1893
1894#if EV_SIGNAL_ENABLE
1895 if (sig_pending)
1896 {
1897 sig_pending = 0;
1898
1899 for (i = EV_NSIG - 1; i--; )
1900 if (expect_false (signals [i].pending))
1901 ev_feed_signal_event (EV_A_ i + 1);
1902 }
1903#endif
1904
1905#if EV_ASYNC_ENABLE
1906 if (async_pending)
1907 {
1908 async_pending = 0;
1909
1910 for (i = asynccnt; i--; )
1911 if (asyncs [i]->sent)
1912 {
1913 asyncs [i]->sent = 0;
1914 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1915 }
1916 }
1917#endif
1918}
1919
1920/*****************************************************************************/
1921
1922void
1923ev_feed_signal (int signum)
1924{
1925#if EV_MULTIPLICITY
1926 EV_P = signals [signum - 1].loop;
1927
1928 if (!EV_A)
1929 return;
1930#endif
1931
1932 if (!ev_active (&pipe_w))
1933 return;
1934
1935 signals [signum - 1].pending = 1;
1936 evpipe_write (EV_A_ &sig_pending);
1937}
1938
1939static void
1940ev_sighandler (int signum)
1941{
1942#ifdef _WIN32
1943 signal (signum, ev_sighandler);
1944#endif
1945
1946 ev_feed_signal (signum);
1947}
1948
1949void noinline
1950ev_feed_signal_event (EV_P_ int signum)
1951{
1952 WL w;
1953
1954 if (expect_false (signum <= 0 || signum > EV_NSIG))
1955 return;
1956
1957 --signum;
1958
1959#if EV_MULTIPLICITY
1960 /* it is permissible to try to feed a signal to the wrong loop */
1961 /* or, likely more useful, feeding a signal nobody is waiting for */
1962
1963 if (expect_false (signals [signum].loop != EV_A))
1964 return;
1965#endif
1966
1967 signals [signum].pending = 0;
1968
1969 for (w = signals [signum].head; w; w = w->next)
1970 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1971}
1972
1973#if EV_USE_SIGNALFD
1974static void
1975sigfdcb (EV_P_ ev_io *iow, int revents)
1976{
1977 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1978
1979 for (;;)
1980 {
1981 ssize_t res = read (sigfd, si, sizeof (si));
1982
1983 /* not ISO-C, as res might be -1, but works with SuS */
1984 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1985 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1986
1987 if (res < (ssize_t)sizeof (si))
1988 break;
1989 }
1990}
1991#endif
1992
1993#endif
1994
1995/*****************************************************************************/
1996
1997#if EV_CHILD_ENABLE
805static WL childs [EV_PID_HASHSIZE]; 1998static WL childs [EV_PID_HASHSIZE];
806 1999
807#ifndef _WIN32
808
809static ev_signal childev; 2000static ev_signal childev;
810 2001
811void inline_speed 2002#ifndef WIFCONTINUED
2003# define WIFCONTINUED(status) 0
2004#endif
2005
2006/* handle a single child status event */
2007inline_speed void
812child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2008child_reap (EV_P_ int chain, int pid, int status)
813{ 2009{
814 ev_child *w; 2010 ev_child *w;
2011 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
815 2012
816 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2013 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2014 {
817 if (w->pid == pid || !w->pid) 2015 if ((w->pid == pid || !w->pid)
2016 && (!traced || (w->flags & 1)))
818 { 2017 {
819 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2018 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
820 w->rpid = pid; 2019 w->rpid = pid;
821 w->rstatus = status; 2020 w->rstatus = status;
822 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2021 ev_feed_event (EV_A_ (W)w, EV_CHILD);
823 } 2022 }
2023 }
824} 2024}
825 2025
826#ifndef WCONTINUED 2026#ifndef WCONTINUED
827# define WCONTINUED 0 2027# define WCONTINUED 0
828#endif 2028#endif
829 2029
2030/* called on sigchld etc., calls waitpid */
830static void 2031static void
831childcb (EV_P_ ev_signal *sw, int revents) 2032childcb (EV_P_ ev_signal *sw, int revents)
832{ 2033{
833 int pid, status; 2034 int pid, status;
834 2035
… …
837 if (!WCONTINUED 2038 if (!WCONTINUED
838 || errno != EINVAL 2039 || errno != EINVAL
839 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2040 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
840 return; 2041 return;
841 2042
842 /* make sure we are called again until all childs have been reaped */ 2043 /* make sure we are called again until all children have been reaped */
843 /* we need to do it this way so that the callback gets called before we continue */ 2044 /* we need to do it this way so that the callback gets called before we continue */
844 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2045 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
845 2046
846 child_reap (EV_A_ sw, pid, pid, status); 2047 child_reap (EV_A_ pid, pid, status);
847 if (EV_PID_HASHSIZE > 1) 2048 if ((EV_PID_HASHSIZE) > 1)
848 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2049 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
849} 2050}
850 2051
851#endif 2052#endif
852 2053
853/*****************************************************************************/ 2054/*****************************************************************************/
854 2055
2056#if EV_USE_IOCP
2057# include "ev_iocp.c"
2058#endif
855#if EV_USE_PORT 2059#if EV_USE_PORT
856# include "ev_port.c" 2060# include "ev_port.c"
857#endif 2061#endif
858#if EV_USE_KQUEUE 2062#if EV_USE_KQUEUE
859# include "ev_kqueue.c" 2063# include "ev_kqueue.c"
… …
866#endif 2070#endif
867#if EV_USE_SELECT 2071#if EV_USE_SELECT
868# include "ev_select.c" 2072# include "ev_select.c"
869#endif 2073#endif
870 2074
871int 2075int ecb_cold
872ev_version_major (void) 2076ev_version_major (void)
873{ 2077{
874 return EV_VERSION_MAJOR; 2078 return EV_VERSION_MAJOR;
875} 2079}
876 2080
877int 2081int ecb_cold
878ev_version_minor (void) 2082ev_version_minor (void)
879{ 2083{
880 return EV_VERSION_MINOR; 2084 return EV_VERSION_MINOR;
881} 2085}
882 2086
883/* return true if we are running with elevated privileges and should ignore env variables */ 2087/* return true if we are running with elevated privileges and should ignore env variables */
884int inline_size 2088int inline_size ecb_cold
885enable_secure (void) 2089enable_secure (void)
886{ 2090{
887#ifdef _WIN32 2091#ifdef _WIN32
888 return 0; 2092 return 0;
889#else 2093#else
890 return getuid () != geteuid () 2094 return getuid () != geteuid ()
891 || getgid () != getegid (); 2095 || getgid () != getegid ();
892#endif 2096#endif
893} 2097}
894 2098
895unsigned int 2099unsigned int ecb_cold
896ev_supported_backends (void) 2100ev_supported_backends (void)
897{ 2101{
898 unsigned int flags = 0; 2102 unsigned int flags = 0;
899 2103
900 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2104 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
904 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2108 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
905 2109
906 return flags; 2110 return flags;
907} 2111}
908 2112
909unsigned int 2113unsigned int ecb_cold
910ev_recommended_backends (void) 2114ev_recommended_backends (void)
911{ 2115{
912 unsigned int flags = ev_supported_backends (); 2116 unsigned int flags = ev_supported_backends ();
913 2117
914#ifndef __NetBSD__ 2118#ifndef __NetBSD__
915 /* kqueue is borked on everything but netbsd apparently */ 2119 /* kqueue is borked on everything but netbsd apparently */
916 /* it usually doesn't work correctly on anything but sockets and pipes */ 2120 /* it usually doesn't work correctly on anything but sockets and pipes */
917 flags &= ~EVBACKEND_KQUEUE; 2121 flags &= ~EVBACKEND_KQUEUE;
918#endif 2122#endif
919#ifdef __APPLE__ 2123#ifdef __APPLE__
920 // flags &= ~EVBACKEND_KQUEUE; for documentation 2124 /* only select works correctly on that "unix-certified" platform */
921 flags &= ~EVBACKEND_POLL; 2125 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2126 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2127#endif
2128#ifdef __FreeBSD__
2129 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
922#endif 2130#endif
923 2131
924 return flags; 2132 return flags;
925} 2133}
926 2134
927unsigned int 2135unsigned int ecb_cold
928ev_embeddable_backends (void) 2136ev_embeddable_backends (void)
929{ 2137{
930 return EVBACKEND_EPOLL 2138 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
931 | EVBACKEND_KQUEUE 2139
932 | EVBACKEND_PORT; 2140 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2141 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2142 flags &= ~EVBACKEND_EPOLL;
2143
2144 return flags;
933} 2145}
934 2146
935unsigned int 2147unsigned int
936ev_backend (EV_P) 2148ev_backend (EV_P)
937{ 2149{
938 return backend; 2150 return backend;
939} 2151}
940 2152
2153#if EV_FEATURE_API
941unsigned int 2154unsigned int
942ev_loop_count (EV_P) 2155ev_iteration (EV_P)
943{ 2156{
944 return loop_count; 2157 return loop_count;
945} 2158}
946 2159
2160unsigned int
2161ev_depth (EV_P)
2162{
2163 return loop_depth;
2164}
2165
2166void
2167ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2168{
2169 io_blocktime = interval;
2170}
2171
2172void
2173ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2174{
2175 timeout_blocktime = interval;
2176}
2177
2178void
2179ev_set_userdata (EV_P_ void *data)
2180{
2181 userdata = data;
2182}
2183
2184void *
2185ev_userdata (EV_P)
2186{
2187 return userdata;
2188}
2189
2190void
2191ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2192{
2193 invoke_cb = invoke_pending_cb;
2194}
2195
2196void
2197ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2198{
2199 release_cb = release;
2200 acquire_cb = acquire;
2201}
2202#endif
2203
2204/* initialise a loop structure, must be zero-initialised */
947static void noinline 2205static void noinline ecb_cold
948loop_init (EV_P_ unsigned int flags) 2206loop_init (EV_P_ unsigned int flags)
949{ 2207{
950 if (!backend) 2208 if (!backend)
951 { 2209 {
2210 origflags = flags;
2211
2212#if EV_USE_REALTIME
2213 if (!have_realtime)
2214 {
2215 struct timespec ts;
2216
2217 if (!clock_gettime (CLOCK_REALTIME, &ts))
2218 have_realtime = 1;
2219 }
2220#endif
2221
952#if EV_USE_MONOTONIC 2222#if EV_USE_MONOTONIC
2223 if (!have_monotonic)
953 { 2224 {
954 struct timespec ts; 2225 struct timespec ts;
2226
955 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2227 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
956 have_monotonic = 1; 2228 have_monotonic = 1;
957 } 2229 }
958#endif 2230#endif
959
960 ev_rt_now = ev_time ();
961 mn_now = get_clock ();
962 now_floor = mn_now;
963 rtmn_diff = ev_rt_now - mn_now;
964 2231
965 /* pid check not overridable via env */ 2232 /* pid check not overridable via env */
966#ifndef _WIN32 2233#ifndef _WIN32
967 if (flags & EVFLAG_FORKCHECK) 2234 if (flags & EVFLAG_FORKCHECK)
968 curpid = getpid (); 2235 curpid = getpid ();
… …
971 if (!(flags & EVFLAG_NOENV) 2238 if (!(flags & EVFLAG_NOENV)
972 && !enable_secure () 2239 && !enable_secure ()
973 && getenv ("LIBEV_FLAGS")) 2240 && getenv ("LIBEV_FLAGS"))
974 flags = atoi (getenv ("LIBEV_FLAGS")); 2241 flags = atoi (getenv ("LIBEV_FLAGS"));
975 2242
976 if (!(flags & 0x0000ffffUL)) 2243 ev_rt_now = ev_time ();
2244 mn_now = get_clock ();
2245 now_floor = mn_now;
2246 rtmn_diff = ev_rt_now - mn_now;
2247#if EV_FEATURE_API
2248 invoke_cb = ev_invoke_pending;
2249#endif
2250
2251 io_blocktime = 0.;
2252 timeout_blocktime = 0.;
2253 backend = 0;
2254 backend_fd = -1;
2255 sig_pending = 0;
2256#if EV_ASYNC_ENABLE
2257 async_pending = 0;
2258#endif
2259 pipe_write_skipped = 0;
2260 pipe_write_wanted = 0;
2261#if EV_USE_INOTIFY
2262 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2263#endif
2264#if EV_USE_SIGNALFD
2265 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2266#endif
2267
2268 if (!(flags & EVBACKEND_MASK))
977 flags |= ev_recommended_backends (); 2269 flags |= ev_recommended_backends ();
978 2270
979 backend = 0;
980 backend_fd = -1;
981#if EV_USE_INOTIFY 2271#if EV_USE_IOCP
982 fs_fd = -2; 2272 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
983#endif 2273#endif
984
985#if EV_USE_PORT 2274#if EV_USE_PORT
986 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2275 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
987#endif 2276#endif
988#if EV_USE_KQUEUE 2277#if EV_USE_KQUEUE
989 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2278 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
996#endif 2285#endif
997#if EV_USE_SELECT 2286#if EV_USE_SELECT
998 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2287 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
999#endif 2288#endif
1000 2289
2290 ev_prepare_init (&pending_w, pendingcb);
2291
2292#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1001 ev_init (&sigev, sigcb); 2293 ev_init (&pipe_w, pipecb);
1002 ev_set_priority (&sigev, EV_MAXPRI); 2294 ev_set_priority (&pipe_w, EV_MAXPRI);
2295#endif
1003 } 2296 }
1004} 2297}
1005 2298
1006static void noinline 2299/* free up a loop structure */
2300void ecb_cold
1007loop_destroy (EV_P) 2301ev_loop_destroy (EV_P)
1008{ 2302{
1009 int i; 2303 int i;
2304
2305#if EV_MULTIPLICITY
2306 /* mimic free (0) */
2307 if (!EV_A)
2308 return;
2309#endif
2310
2311#if EV_CLEANUP_ENABLE
2312 /* queue cleanup watchers (and execute them) */
2313 if (expect_false (cleanupcnt))
2314 {
2315 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2316 EV_INVOKE_PENDING;
2317 }
2318#endif
2319
2320#if EV_CHILD_ENABLE
2321 if (ev_is_active (&childev))
2322 {
2323 ev_ref (EV_A); /* child watcher */
2324 ev_signal_stop (EV_A_ &childev);
2325 }
2326#endif
2327
2328 if (ev_is_active (&pipe_w))
2329 {
2330 /*ev_ref (EV_A);*/
2331 /*ev_io_stop (EV_A_ &pipe_w);*/
2332
2333#if EV_USE_EVENTFD
2334 if (evfd >= 0)
2335 close (evfd);
2336#endif
2337
2338 if (evpipe [0] >= 0)
2339 {
2340 EV_WIN32_CLOSE_FD (evpipe [0]);
2341 EV_WIN32_CLOSE_FD (evpipe [1]);
2342 }
2343 }
2344
2345#if EV_USE_SIGNALFD
2346 if (ev_is_active (&sigfd_w))
2347 close (sigfd);
2348#endif
1010 2349
1011#if EV_USE_INOTIFY 2350#if EV_USE_INOTIFY
1012 if (fs_fd >= 0) 2351 if (fs_fd >= 0)
1013 close (fs_fd); 2352 close (fs_fd);
1014#endif 2353#endif
1015 2354
1016 if (backend_fd >= 0) 2355 if (backend_fd >= 0)
1017 close (backend_fd); 2356 close (backend_fd);
1018 2357
2358#if EV_USE_IOCP
2359 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2360#endif
1019#if EV_USE_PORT 2361#if EV_USE_PORT
1020 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2362 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1021#endif 2363#endif
1022#if EV_USE_KQUEUE 2364#if EV_USE_KQUEUE
1023 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2365 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1038#if EV_IDLE_ENABLE 2380#if EV_IDLE_ENABLE
1039 array_free (idle, [i]); 2381 array_free (idle, [i]);
1040#endif 2382#endif
1041 } 2383 }
1042 2384
1043 ev_free (anfds); anfdmax = 0; 2385 ev_free (anfds); anfds = 0; anfdmax = 0;
1044 2386
1045 /* have to use the microsoft-never-gets-it-right macro */ 2387 /* have to use the microsoft-never-gets-it-right macro */
2388 array_free (rfeed, EMPTY);
1046 array_free (fdchange, EMPTY); 2389 array_free (fdchange, EMPTY);
1047 array_free (timer, EMPTY); 2390 array_free (timer, EMPTY);
1048#if EV_PERIODIC_ENABLE 2391#if EV_PERIODIC_ENABLE
1049 array_free (periodic, EMPTY); 2392 array_free (periodic, EMPTY);
1050#endif 2393#endif
2394#if EV_FORK_ENABLE
2395 array_free (fork, EMPTY);
2396#endif
2397#if EV_CLEANUP_ENABLE
2398 array_free (cleanup, EMPTY);
2399#endif
1051 array_free (prepare, EMPTY); 2400 array_free (prepare, EMPTY);
1052 array_free (check, EMPTY); 2401 array_free (check, EMPTY);
2402#if EV_ASYNC_ENABLE
1053 array_free (fork, EMPTY); 2403 array_free (async, EMPTY);
2404#endif
1054 2405
1055 backend = 0; 2406 backend = 0;
1056}
1057 2407
2408#if EV_MULTIPLICITY
2409 if (ev_is_default_loop (EV_A))
2410#endif
2411 ev_default_loop_ptr = 0;
2412#if EV_MULTIPLICITY
2413 else
2414 ev_free (EV_A);
2415#endif
2416}
2417
2418#if EV_USE_INOTIFY
1058void inline_size infy_fork (EV_P); 2419inline_size void infy_fork (EV_P);
2420#endif
1059 2421
1060void inline_size 2422inline_size void
1061loop_fork (EV_P) 2423loop_fork (EV_P)
1062{ 2424{
1063#if EV_USE_PORT 2425#if EV_USE_PORT
1064 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2426 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1065#endif 2427#endif
… …
1071#endif 2433#endif
1072#if EV_USE_INOTIFY 2434#if EV_USE_INOTIFY
1073 infy_fork (EV_A); 2435 infy_fork (EV_A);
1074#endif 2436#endif
1075 2437
1076 if (ev_is_active (&sigev)) 2438 if (ev_is_active (&pipe_w))
1077 { 2439 {
1078 /* default loop */ 2440 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1079 2441
1080 ev_ref (EV_A); 2442 ev_ref (EV_A);
1081 ev_io_stop (EV_A_ &sigev); 2443 ev_io_stop (EV_A_ &pipe_w);
1082 close (sigpipe [0]);
1083 close (sigpipe [1]);
1084 2444
1085 while (pipe (sigpipe)) 2445#if EV_USE_EVENTFD
1086 syserr ("(libev) error creating pipe"); 2446 if (evfd >= 0)
2447 close (evfd);
2448#endif
1087 2449
2450 if (evpipe [0] >= 0)
2451 {
2452 EV_WIN32_CLOSE_FD (evpipe [0]);
2453 EV_WIN32_CLOSE_FD (evpipe [1]);
2454 }
2455
2456#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1088 siginit (EV_A); 2457 evpipe_init (EV_A);
2458 /* now iterate over everything, in case we missed something */
2459 pipecb (EV_A_ &pipe_w, EV_READ);
2460#endif
1089 } 2461 }
1090 2462
1091 postfork = 0; 2463 postfork = 0;
1092} 2464}
1093 2465
1094#if EV_MULTIPLICITY 2466#if EV_MULTIPLICITY
2467
1095struct ev_loop * 2468struct ev_loop * ecb_cold
1096ev_loop_new (unsigned int flags) 2469ev_loop_new (unsigned int flags)
1097{ 2470{
1098 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2471 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1099 2472
1100 memset (loop, 0, sizeof (struct ev_loop)); 2473 memset (EV_A, 0, sizeof (struct ev_loop));
1101
1102 loop_init (EV_A_ flags); 2474 loop_init (EV_A_ flags);
1103 2475
1104 if (ev_backend (EV_A)) 2476 if (ev_backend (EV_A))
1105 return loop; 2477 return EV_A;
1106 2478
2479 ev_free (EV_A);
1107 return 0; 2480 return 0;
1108} 2481}
1109 2482
1110void 2483#endif /* multiplicity */
1111ev_loop_destroy (EV_P)
1112{
1113 loop_destroy (EV_A);
1114 ev_free (loop);
1115}
1116 2484
1117void 2485#if EV_VERIFY
1118ev_loop_fork (EV_P) 2486static void noinline ecb_cold
2487verify_watcher (EV_P_ W w)
1119{ 2488{
1120 postfork = 1; 2489 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1121}
1122 2490
2491 if (w->pending)
2492 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2493}
2494
2495static void noinline ecb_cold
2496verify_heap (EV_P_ ANHE *heap, int N)
2497{
2498 int i;
2499
2500 for (i = HEAP0; i < N + HEAP0; ++i)
2501 {
2502 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2503 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2504 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2505
2506 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2507 }
2508}
2509
2510static void noinline ecb_cold
2511array_verify (EV_P_ W *ws, int cnt)
2512{
2513 while (cnt--)
2514 {
2515 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2516 verify_watcher (EV_A_ ws [cnt]);
2517 }
2518}
2519#endif
2520
2521#if EV_FEATURE_API
2522void ecb_cold
2523ev_verify (EV_P)
2524{
2525#if EV_VERIFY
2526 int i;
2527 WL w;
2528
2529 assert (activecnt >= -1);
2530
2531 assert (fdchangemax >= fdchangecnt);
2532 for (i = 0; i < fdchangecnt; ++i)
2533 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2534
2535 assert (anfdmax >= 0);
2536 for (i = 0; i < anfdmax; ++i)
2537 for (w = anfds [i].head; w; w = w->next)
2538 {
2539 verify_watcher (EV_A_ (W)w);
2540 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2541 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2542 }
2543
2544 assert (timermax >= timercnt);
2545 verify_heap (EV_A_ timers, timercnt);
2546
2547#if EV_PERIODIC_ENABLE
2548 assert (periodicmax >= periodiccnt);
2549 verify_heap (EV_A_ periodics, periodiccnt);
2550#endif
2551
2552 for (i = NUMPRI; i--; )
2553 {
2554 assert (pendingmax [i] >= pendingcnt [i]);
2555#if EV_IDLE_ENABLE
2556 assert (idleall >= 0);
2557 assert (idlemax [i] >= idlecnt [i]);
2558 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2559#endif
2560 }
2561
2562#if EV_FORK_ENABLE
2563 assert (forkmax >= forkcnt);
2564 array_verify (EV_A_ (W *)forks, forkcnt);
2565#endif
2566
2567#if EV_CLEANUP_ENABLE
2568 assert (cleanupmax >= cleanupcnt);
2569 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2570#endif
2571
2572#if EV_ASYNC_ENABLE
2573 assert (asyncmax >= asynccnt);
2574 array_verify (EV_A_ (W *)asyncs, asynccnt);
2575#endif
2576
2577#if EV_PREPARE_ENABLE
2578 assert (preparemax >= preparecnt);
2579 array_verify (EV_A_ (W *)prepares, preparecnt);
2580#endif
2581
2582#if EV_CHECK_ENABLE
2583 assert (checkmax >= checkcnt);
2584 array_verify (EV_A_ (W *)checks, checkcnt);
2585#endif
2586
2587# if 0
2588#if EV_CHILD_ENABLE
2589 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2590 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2591#endif
2592# endif
2593#endif
2594}
1123#endif 2595#endif
1124 2596
1125#if EV_MULTIPLICITY 2597#if EV_MULTIPLICITY
1126struct ev_loop * 2598struct ev_loop * ecb_cold
1127ev_default_loop_init (unsigned int flags)
1128#else 2599#else
1129int 2600int
2601#endif
1130ev_default_loop (unsigned int flags) 2602ev_default_loop (unsigned int flags)
1131#endif
1132{ 2603{
1133 if (sigpipe [0] == sigpipe [1])
1134 if (pipe (sigpipe))
1135 return 0;
1136
1137 if (!ev_default_loop_ptr) 2604 if (!ev_default_loop_ptr)
1138 { 2605 {
1139#if EV_MULTIPLICITY 2606#if EV_MULTIPLICITY
1140 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2607 EV_P = ev_default_loop_ptr = &default_loop_struct;
1141#else 2608#else
1142 ev_default_loop_ptr = 1; 2609 ev_default_loop_ptr = 1;
1143#endif 2610#endif
1144 2611
1145 loop_init (EV_A_ flags); 2612 loop_init (EV_A_ flags);
1146 2613
1147 if (ev_backend (EV_A)) 2614 if (ev_backend (EV_A))
1148 { 2615 {
1149 siginit (EV_A); 2616#if EV_CHILD_ENABLE
1150
1151#ifndef _WIN32
1152 ev_signal_init (&childev, childcb, SIGCHLD); 2617 ev_signal_init (&childev, childcb, SIGCHLD);
1153 ev_set_priority (&childev, EV_MAXPRI); 2618 ev_set_priority (&childev, EV_MAXPRI);
1154 ev_signal_start (EV_A_ &childev); 2619 ev_signal_start (EV_A_ &childev);
1155 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2620 ev_unref (EV_A); /* child watcher should not keep loop alive */
1156#endif 2621#endif
… …
1161 2626
1162 return ev_default_loop_ptr; 2627 return ev_default_loop_ptr;
1163} 2628}
1164 2629
1165void 2630void
1166ev_default_destroy (void) 2631ev_loop_fork (EV_P)
1167{ 2632{
1168#if EV_MULTIPLICITY 2633 postfork = 1; /* must be in line with ev_default_fork */
1169 struct ev_loop *loop = ev_default_loop_ptr;
1170#endif
1171
1172#ifndef _WIN32
1173 ev_ref (EV_A); /* child watcher */
1174 ev_signal_stop (EV_A_ &childev);
1175#endif
1176
1177 ev_ref (EV_A); /* signal watcher */
1178 ev_io_stop (EV_A_ &sigev);
1179
1180 close (sigpipe [0]); sigpipe [0] = 0;
1181 close (sigpipe [1]); sigpipe [1] = 0;
1182
1183 loop_destroy (EV_A);
1184}
1185
1186void
1187ev_default_fork (void)
1188{
1189#if EV_MULTIPLICITY
1190 struct ev_loop *loop = ev_default_loop_ptr;
1191#endif
1192
1193 if (backend)
1194 postfork = 1;
1195} 2634}
1196 2635
1197/*****************************************************************************/ 2636/*****************************************************************************/
1198 2637
1199void 2638void
1200ev_invoke (EV_P_ void *w, int revents) 2639ev_invoke (EV_P_ void *w, int revents)
1201{ 2640{
1202 EV_CB_INVOKE ((W)w, revents); 2641 EV_CB_INVOKE ((W)w, revents);
1203} 2642}
1204 2643
1205void inline_speed 2644unsigned int
1206call_pending (EV_P) 2645ev_pending_count (EV_P)
2646{
2647 int pri;
2648 unsigned int count = 0;
2649
2650 for (pri = NUMPRI; pri--; )
2651 count += pendingcnt [pri];
2652
2653 return count;
2654}
2655
2656void noinline
2657ev_invoke_pending (EV_P)
1207{ 2658{
1208 int pri; 2659 int pri;
1209 2660
1210 for (pri = NUMPRI; pri--; ) 2661 for (pri = NUMPRI; pri--; )
1211 while (pendingcnt [pri]) 2662 while (pendingcnt [pri])
1212 { 2663 {
1213 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2664 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1214 2665
1215 if (expect_true (p->w))
1216 {
1217 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1218
1219 p->w->pending = 0; 2666 p->w->pending = 0;
1220 EV_CB_INVOKE (p->w, p->events); 2667 EV_CB_INVOKE (p->w, p->events);
1221 } 2668 EV_FREQUENT_CHECK;
1222 } 2669 }
1223} 2670}
1224 2671
1225void inline_size
1226timers_reify (EV_P)
1227{
1228 while (timercnt && ((WT)timers [0])->at <= mn_now)
1229 {
1230 ev_timer *w = (ev_timer *)timers [0];
1231
1232 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1233
1234 /* first reschedule or stop timer */
1235 if (w->repeat)
1236 {
1237 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1238
1239 ((WT)w)->at += w->repeat;
1240 if (((WT)w)->at < mn_now)
1241 ((WT)w)->at = mn_now;
1242
1243 downheap (timers, timercnt, 0);
1244 }
1245 else
1246 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1247
1248 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1249 }
1250}
1251
1252#if EV_PERIODIC_ENABLE
1253void inline_size
1254periodics_reify (EV_P)
1255{
1256 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1257 {
1258 ev_periodic *w = (ev_periodic *)periodics [0];
1259
1260 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1261
1262 /* first reschedule or stop timer */
1263 if (w->reschedule_cb)
1264 {
1265 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1266 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1267 downheap (periodics, periodiccnt, 0);
1268 }
1269 else if (w->interval)
1270 {
1271 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1272 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1273 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1274 downheap (periodics, periodiccnt, 0);
1275 }
1276 else
1277 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1278
1279 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1280 }
1281}
1282
1283static void noinline
1284periodics_reschedule (EV_P)
1285{
1286 int i;
1287
1288 /* adjust periodics after time jump */
1289 for (i = 0; i < periodiccnt; ++i)
1290 {
1291 ev_periodic *w = (ev_periodic *)periodics [i];
1292
1293 if (w->reschedule_cb)
1294 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1295 else if (w->interval)
1296 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1297 }
1298
1299 /* now rebuild the heap */
1300 for (i = periodiccnt >> 1; i--; )
1301 downheap (periodics, periodiccnt, i);
1302}
1303#endif
1304
1305#if EV_IDLE_ENABLE 2672#if EV_IDLE_ENABLE
1306void inline_size 2673/* make idle watchers pending. this handles the "call-idle */
2674/* only when higher priorities are idle" logic */
2675inline_size void
1307idle_reify (EV_P) 2676idle_reify (EV_P)
1308{ 2677{
1309 if (expect_false (idleall)) 2678 if (expect_false (idleall))
1310 { 2679 {
1311 int pri; 2680 int pri;
… …
1323 } 2692 }
1324 } 2693 }
1325} 2694}
1326#endif 2695#endif
1327 2696
1328void inline_speed 2697/* make timers pending */
2698inline_size void
2699timers_reify (EV_P)
2700{
2701 EV_FREQUENT_CHECK;
2702
2703 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2704 {
2705 do
2706 {
2707 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2708
2709 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2710
2711 /* first reschedule or stop timer */
2712 if (w->repeat)
2713 {
2714 ev_at (w) += w->repeat;
2715 if (ev_at (w) < mn_now)
2716 ev_at (w) = mn_now;
2717
2718 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2719
2720 ANHE_at_cache (timers [HEAP0]);
2721 downheap (timers, timercnt, HEAP0);
2722 }
2723 else
2724 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2725
2726 EV_FREQUENT_CHECK;
2727 feed_reverse (EV_A_ (W)w);
2728 }
2729 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2730
2731 feed_reverse_done (EV_A_ EV_TIMER);
2732 }
2733}
2734
2735#if EV_PERIODIC_ENABLE
2736
2737static void noinline
2738periodic_recalc (EV_P_ ev_periodic *w)
2739{
2740 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2741 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2742
2743 /* the above almost always errs on the low side */
2744 while (at <= ev_rt_now)
2745 {
2746 ev_tstamp nat = at + w->interval;
2747
2748 /* when resolution fails us, we use ev_rt_now */
2749 if (expect_false (nat == at))
2750 {
2751 at = ev_rt_now;
2752 break;
2753 }
2754
2755 at = nat;
2756 }
2757
2758 ev_at (w) = at;
2759}
2760
2761/* make periodics pending */
2762inline_size void
2763periodics_reify (EV_P)
2764{
2765 EV_FREQUENT_CHECK;
2766
2767 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2768 {
2769 int feed_count = 0;
2770
2771 do
2772 {
2773 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2774
2775 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2776
2777 /* first reschedule or stop timer */
2778 if (w->reschedule_cb)
2779 {
2780 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2781
2782 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2783
2784 ANHE_at_cache (periodics [HEAP0]);
2785 downheap (periodics, periodiccnt, HEAP0);
2786 }
2787 else if (w->interval)
2788 {
2789 periodic_recalc (EV_A_ w);
2790 ANHE_at_cache (periodics [HEAP0]);
2791 downheap (periodics, periodiccnt, HEAP0);
2792 }
2793 else
2794 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2795
2796 EV_FREQUENT_CHECK;
2797 feed_reverse (EV_A_ (W)w);
2798 }
2799 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2800
2801 feed_reverse_done (EV_A_ EV_PERIODIC);
2802 }
2803}
2804
2805/* simply recalculate all periodics */
2806/* TODO: maybe ensure that at least one event happens when jumping forward? */
2807static void noinline ecb_cold
2808periodics_reschedule (EV_P)
2809{
2810 int i;
2811
2812 /* adjust periodics after time jump */
2813 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2814 {
2815 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2816
2817 if (w->reschedule_cb)
2818 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2819 else if (w->interval)
2820 periodic_recalc (EV_A_ w);
2821
2822 ANHE_at_cache (periodics [i]);
2823 }
2824
2825 reheap (periodics, periodiccnt);
2826}
2827#endif
2828
2829/* adjust all timers by a given offset */
2830static void noinline ecb_cold
2831timers_reschedule (EV_P_ ev_tstamp adjust)
2832{
2833 int i;
2834
2835 for (i = 0; i < timercnt; ++i)
2836 {
2837 ANHE *he = timers + i + HEAP0;
2838 ANHE_w (*he)->at += adjust;
2839 ANHE_at_cache (*he);
2840 }
2841}
2842
2843/* fetch new monotonic and realtime times from the kernel */
2844/* also detect if there was a timejump, and act accordingly */
2845inline_speed void
1329time_update (EV_P_ ev_tstamp max_block) 2846time_update (EV_P_ ev_tstamp max_block)
1330{ 2847{
1331 int i;
1332
1333#if EV_USE_MONOTONIC 2848#if EV_USE_MONOTONIC
1334 if (expect_true (have_monotonic)) 2849 if (expect_true (have_monotonic))
1335 { 2850 {
2851 int i;
1336 ev_tstamp odiff = rtmn_diff; 2852 ev_tstamp odiff = rtmn_diff;
1337 2853
1338 mn_now = get_clock (); 2854 mn_now = get_clock ();
1339 2855
1340 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2856 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1356 * doesn't hurt either as we only do this on time-jumps or 2872 * doesn't hurt either as we only do this on time-jumps or
1357 * in the unlikely event of having been preempted here. 2873 * in the unlikely event of having been preempted here.
1358 */ 2874 */
1359 for (i = 4; --i; ) 2875 for (i = 4; --i; )
1360 { 2876 {
2877 ev_tstamp diff;
1361 rtmn_diff = ev_rt_now - mn_now; 2878 rtmn_diff = ev_rt_now - mn_now;
1362 2879
1363 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2880 diff = odiff - rtmn_diff;
2881
2882 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1364 return; /* all is well */ 2883 return; /* all is well */
1365 2884
1366 ev_rt_now = ev_time (); 2885 ev_rt_now = ev_time ();
1367 mn_now = get_clock (); 2886 mn_now = get_clock ();
1368 now_floor = mn_now; 2887 now_floor = mn_now;
1369 } 2888 }
1370 2889
2890 /* no timer adjustment, as the monotonic clock doesn't jump */
2891 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1371# if EV_PERIODIC_ENABLE 2892# if EV_PERIODIC_ENABLE
1372 periodics_reschedule (EV_A); 2893 periodics_reschedule (EV_A);
1373# endif 2894# endif
1374 /* no timer adjustment, as the monotonic clock doesn't jump */
1375 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1376 } 2895 }
1377 else 2896 else
1378#endif 2897#endif
1379 { 2898 {
1380 ev_rt_now = ev_time (); 2899 ev_rt_now = ev_time ();
1381 2900
1382 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2901 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1383 { 2902 {
2903 /* adjust timers. this is easy, as the offset is the same for all of them */
2904 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1384#if EV_PERIODIC_ENABLE 2905#if EV_PERIODIC_ENABLE
1385 periodics_reschedule (EV_A); 2906 periodics_reschedule (EV_A);
1386#endif 2907#endif
1387 /* adjust timers. this is easy, as the offset is the same for all of them */
1388 for (i = 0; i < timercnt; ++i)
1389 ((WT)timers [i])->at += ev_rt_now - mn_now;
1390 } 2908 }
1391 2909
1392 mn_now = ev_rt_now; 2910 mn_now = ev_rt_now;
1393 } 2911 }
1394} 2912}
1395 2913
1396void 2914void
1397ev_ref (EV_P)
1398{
1399 ++activecnt;
1400}
1401
1402void
1403ev_unref (EV_P)
1404{
1405 --activecnt;
1406}
1407
1408static int loop_done;
1409
1410void
1411ev_loop (EV_P_ int flags) 2915ev_run (EV_P_ int flags)
1412{ 2916{
1413 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2917#if EV_FEATURE_API
1414 ? EVUNLOOP_ONE 2918 ++loop_depth;
1415 : EVUNLOOP_CANCEL; 2919#endif
1416 2920
2921 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2922
2923 loop_done = EVBREAK_CANCEL;
2924
1417 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2925 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1418 2926
1419 do 2927 do
1420 { 2928 {
2929#if EV_VERIFY >= 2
2930 ev_verify (EV_A);
2931#endif
2932
1421#ifndef _WIN32 2933#ifndef _WIN32
1422 if (expect_false (curpid)) /* penalise the forking check even more */ 2934 if (expect_false (curpid)) /* penalise the forking check even more */
1423 if (expect_false (getpid () != curpid)) 2935 if (expect_false (getpid () != curpid))
1424 { 2936 {
1425 curpid = getpid (); 2937 curpid = getpid ();
… …
1431 /* we might have forked, so queue fork handlers */ 2943 /* we might have forked, so queue fork handlers */
1432 if (expect_false (postfork)) 2944 if (expect_false (postfork))
1433 if (forkcnt) 2945 if (forkcnt)
1434 { 2946 {
1435 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2947 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1436 call_pending (EV_A); 2948 EV_INVOKE_PENDING;
1437 } 2949 }
1438#endif 2950#endif
1439 2951
2952#if EV_PREPARE_ENABLE
1440 /* queue prepare watchers (and execute them) */ 2953 /* queue prepare watchers (and execute them) */
1441 if (expect_false (preparecnt)) 2954 if (expect_false (preparecnt))
1442 { 2955 {
1443 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2956 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1444 call_pending (EV_A); 2957 EV_INVOKE_PENDING;
1445 } 2958 }
2959#endif
1446 2960
1447 if (expect_false (!activecnt)) 2961 if (expect_false (loop_done))
1448 break; 2962 break;
1449 2963
1450 /* we might have forked, so reify kernel state if necessary */ 2964 /* we might have forked, so reify kernel state if necessary */
1451 if (expect_false (postfork)) 2965 if (expect_false (postfork))
1452 loop_fork (EV_A); 2966 loop_fork (EV_A);
… …
1454 /* update fd-related kernel structures */ 2968 /* update fd-related kernel structures */
1455 fd_reify (EV_A); 2969 fd_reify (EV_A);
1456 2970
1457 /* calculate blocking time */ 2971 /* calculate blocking time */
1458 { 2972 {
1459 ev_tstamp block; 2973 ev_tstamp waittime = 0.;
2974 ev_tstamp sleeptime = 0.;
1460 2975
1461 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2976 /* remember old timestamp for io_blocktime calculation */
1462 block = 0.; /* do not block at all */ 2977 ev_tstamp prev_mn_now = mn_now;
1463 else 2978
2979 /* update time to cancel out callback processing overhead */
2980 time_update (EV_A_ 1e100);
2981
2982 /* from now on, we want a pipe-wake-up */
2983 pipe_write_wanted = 1;
2984
2985 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2986
2987 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1464 { 2988 {
1465 /* update time to cancel out callback processing overhead */
1466 time_update (EV_A_ 1e100);
1467
1468 block = MAX_BLOCKTIME; 2989 waittime = MAX_BLOCKTIME;
1469 2990
1470 if (timercnt) 2991 if (timercnt)
1471 { 2992 {
1472 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2993 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1473 if (block > to) block = to; 2994 if (waittime > to) waittime = to;
1474 } 2995 }
1475 2996
1476#if EV_PERIODIC_ENABLE 2997#if EV_PERIODIC_ENABLE
1477 if (periodiccnt) 2998 if (periodiccnt)
1478 { 2999 {
1479 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3000 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1480 if (block > to) block = to; 3001 if (waittime > to) waittime = to;
1481 } 3002 }
1482#endif 3003#endif
1483 3004
3005 /* don't let timeouts decrease the waittime below timeout_blocktime */
3006 if (expect_false (waittime < timeout_blocktime))
3007 waittime = timeout_blocktime;
3008
3009 /* at this point, we NEED to wait, so we have to ensure */
3010 /* to pass a minimum nonzero value to the backend */
3011 if (expect_false (waittime < backend_mintime))
3012 waittime = backend_mintime;
3013
3014 /* extra check because io_blocktime is commonly 0 */
1484 if (expect_false (block < 0.)) block = 0.; 3015 if (expect_false (io_blocktime))
3016 {
3017 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3018
3019 if (sleeptime > waittime - backend_mintime)
3020 sleeptime = waittime - backend_mintime;
3021
3022 if (expect_true (sleeptime > 0.))
3023 {
3024 ev_sleep (sleeptime);
3025 waittime -= sleeptime;
3026 }
3027 }
1485 } 3028 }
1486 3029
3030#if EV_FEATURE_API
1487 ++loop_count; 3031 ++loop_count;
3032#endif
3033 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1488 backend_poll (EV_A_ block); 3034 backend_poll (EV_A_ waittime);
3035 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3036
3037 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3038
3039 if (pipe_write_skipped)
3040 {
3041 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3042 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3043 }
3044
1489 3045
1490 /* update ev_rt_now, do magic */ 3046 /* update ev_rt_now, do magic */
1491 time_update (EV_A_ block); 3047 time_update (EV_A_ waittime + sleeptime);
1492 } 3048 }
1493 3049
1494 /* queue pending timers and reschedule them */ 3050 /* queue pending timers and reschedule them */
1495 timers_reify (EV_A); /* relative timers called last */ 3051 timers_reify (EV_A); /* relative timers called last */
1496#if EV_PERIODIC_ENABLE 3052#if EV_PERIODIC_ENABLE
… …
1500#if EV_IDLE_ENABLE 3056#if EV_IDLE_ENABLE
1501 /* queue idle watchers unless other events are pending */ 3057 /* queue idle watchers unless other events are pending */
1502 idle_reify (EV_A); 3058 idle_reify (EV_A);
1503#endif 3059#endif
1504 3060
3061#if EV_CHECK_ENABLE
1505 /* queue check watchers, to be executed first */ 3062 /* queue check watchers, to be executed first */
1506 if (expect_false (checkcnt)) 3063 if (expect_false (checkcnt))
1507 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3064 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3065#endif
1508 3066
1509 call_pending (EV_A); 3067 EV_INVOKE_PENDING;
1510
1511 } 3068 }
1512 while (expect_true (activecnt && !loop_done)); 3069 while (expect_true (
3070 activecnt
3071 && !loop_done
3072 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3073 ));
1513 3074
1514 if (loop_done == EVUNLOOP_ONE) 3075 if (loop_done == EVBREAK_ONE)
1515 loop_done = EVUNLOOP_CANCEL; 3076 loop_done = EVBREAK_CANCEL;
3077
3078#if EV_FEATURE_API
3079 --loop_depth;
3080#endif
1516} 3081}
1517 3082
1518void 3083void
1519ev_unloop (EV_P_ int how) 3084ev_break (EV_P_ int how)
1520{ 3085{
1521 loop_done = how; 3086 loop_done = how;
1522} 3087}
1523 3088
3089void
3090ev_ref (EV_P)
3091{
3092 ++activecnt;
3093}
3094
3095void
3096ev_unref (EV_P)
3097{
3098 --activecnt;
3099}
3100
3101void
3102ev_now_update (EV_P)
3103{
3104 time_update (EV_A_ 1e100);
3105}
3106
3107void
3108ev_suspend (EV_P)
3109{
3110 ev_now_update (EV_A);
3111}
3112
3113void
3114ev_resume (EV_P)
3115{
3116 ev_tstamp mn_prev = mn_now;
3117
3118 ev_now_update (EV_A);
3119 timers_reschedule (EV_A_ mn_now - mn_prev);
3120#if EV_PERIODIC_ENABLE
3121 /* TODO: really do this? */
3122 periodics_reschedule (EV_A);
3123#endif
3124}
3125
1524/*****************************************************************************/ 3126/*****************************************************************************/
3127/* singly-linked list management, used when the expected list length is short */
1525 3128
1526void inline_size 3129inline_size void
1527wlist_add (WL *head, WL elem) 3130wlist_add (WL *head, WL elem)
1528{ 3131{
1529 elem->next = *head; 3132 elem->next = *head;
1530 *head = elem; 3133 *head = elem;
1531} 3134}
1532 3135
1533void inline_size 3136inline_size void
1534wlist_del (WL *head, WL elem) 3137wlist_del (WL *head, WL elem)
1535{ 3138{
1536 while (*head) 3139 while (*head)
1537 { 3140 {
1538 if (*head == elem) 3141 if (expect_true (*head == elem))
1539 { 3142 {
1540 *head = elem->next; 3143 *head = elem->next;
1541 return; 3144 break;
1542 } 3145 }
1543 3146
1544 head = &(*head)->next; 3147 head = &(*head)->next;
1545 } 3148 }
1546} 3149}
1547 3150
1548void inline_speed 3151/* internal, faster, version of ev_clear_pending */
3152inline_speed void
1549clear_pending (EV_P_ W w) 3153clear_pending (EV_P_ W w)
1550{ 3154{
1551 if (w->pending) 3155 if (w->pending)
1552 { 3156 {
1553 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3157 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1554 w->pending = 0; 3158 w->pending = 0;
1555 } 3159 }
1556} 3160}
1557 3161
1558int 3162int
… …
1562 int pending = w_->pending; 3166 int pending = w_->pending;
1563 3167
1564 if (expect_true (pending)) 3168 if (expect_true (pending))
1565 { 3169 {
1566 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3170 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3171 p->w = (W)&pending_w;
1567 w_->pending = 0; 3172 w_->pending = 0;
1568 p->w = 0;
1569 return p->events; 3173 return p->events;
1570 } 3174 }
1571 else 3175 else
1572 return 0; 3176 return 0;
1573} 3177}
1574 3178
1575void inline_size 3179inline_size void
1576pri_adjust (EV_P_ W w) 3180pri_adjust (EV_P_ W w)
1577{ 3181{
1578 int pri = w->priority; 3182 int pri = ev_priority (w);
1579 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3183 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1580 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3184 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1581 w->priority = pri; 3185 ev_set_priority (w, pri);
1582} 3186}
1583 3187
1584void inline_speed 3188inline_speed void
1585ev_start (EV_P_ W w, int active) 3189ev_start (EV_P_ W w, int active)
1586{ 3190{
1587 pri_adjust (EV_A_ w); 3191 pri_adjust (EV_A_ w);
1588 w->active = active; 3192 w->active = active;
1589 ev_ref (EV_A); 3193 ev_ref (EV_A);
1590} 3194}
1591 3195
1592void inline_size 3196inline_size void
1593ev_stop (EV_P_ W w) 3197ev_stop (EV_P_ W w)
1594{ 3198{
1595 ev_unref (EV_A); 3199 ev_unref (EV_A);
1596 w->active = 0; 3200 w->active = 0;
1597} 3201}
… …
1604 int fd = w->fd; 3208 int fd = w->fd;
1605 3209
1606 if (expect_false (ev_is_active (w))) 3210 if (expect_false (ev_is_active (w)))
1607 return; 3211 return;
1608 3212
1609 assert (("ev_io_start called with negative fd", fd >= 0)); 3213 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3214 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3215
3216 EV_FREQUENT_CHECK;
1610 3217
1611 ev_start (EV_A_ (W)w, 1); 3218 ev_start (EV_A_ (W)w, 1);
1612 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3219 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1613 wlist_add (&anfds[fd].head, (WL)w); 3220 wlist_add (&anfds[fd].head, (WL)w);
1614 3221
1615 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3222 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1616 w->events &= ~EV_IOFDSET; 3223 w->events &= ~EV__IOFDSET;
3224
3225 EV_FREQUENT_CHECK;
1617} 3226}
1618 3227
1619void noinline 3228void noinline
1620ev_io_stop (EV_P_ ev_io *w) 3229ev_io_stop (EV_P_ ev_io *w)
1621{ 3230{
1622 clear_pending (EV_A_ (W)w); 3231 clear_pending (EV_A_ (W)w);
1623 if (expect_false (!ev_is_active (w))) 3232 if (expect_false (!ev_is_active (w)))
1624 return; 3233 return;
1625 3234
1626 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3235 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3236
3237 EV_FREQUENT_CHECK;
1627 3238
1628 wlist_del (&anfds[w->fd].head, (WL)w); 3239 wlist_del (&anfds[w->fd].head, (WL)w);
1629 ev_stop (EV_A_ (W)w); 3240 ev_stop (EV_A_ (W)w);
1630 3241
1631 fd_change (EV_A_ w->fd, 1); 3242 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3243
3244 EV_FREQUENT_CHECK;
1632} 3245}
1633 3246
1634void noinline 3247void noinline
1635ev_timer_start (EV_P_ ev_timer *w) 3248ev_timer_start (EV_P_ ev_timer *w)
1636{ 3249{
1637 if (expect_false (ev_is_active (w))) 3250 if (expect_false (ev_is_active (w)))
1638 return; 3251 return;
1639 3252
1640 ((WT)w)->at += mn_now; 3253 ev_at (w) += mn_now;
1641 3254
1642 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3255 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1643 3256
3257 EV_FREQUENT_CHECK;
3258
3259 ++timercnt;
1644 ev_start (EV_A_ (W)w, ++timercnt); 3260 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1645 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3261 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1646 timers [timercnt - 1] = (WT)w; 3262 ANHE_w (timers [ev_active (w)]) = (WT)w;
1647 upheap (timers, timercnt - 1); 3263 ANHE_at_cache (timers [ev_active (w)]);
3264 upheap (timers, ev_active (w));
1648 3265
3266 EV_FREQUENT_CHECK;
3267
1649 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3268 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1650} 3269}
1651 3270
1652void noinline 3271void noinline
1653ev_timer_stop (EV_P_ ev_timer *w) 3272ev_timer_stop (EV_P_ ev_timer *w)
1654{ 3273{
1655 clear_pending (EV_A_ (W)w); 3274 clear_pending (EV_A_ (W)w);
1656 if (expect_false (!ev_is_active (w))) 3275 if (expect_false (!ev_is_active (w)))
1657 return; 3276 return;
1658 3277
1659 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3278 EV_FREQUENT_CHECK;
1660 3279
1661 { 3280 {
1662 int active = ((W)w)->active; 3281 int active = ev_active (w);
1663 3282
3283 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3284
3285 --timercnt;
3286
1664 if (expect_true (--active < --timercnt)) 3287 if (expect_true (active < timercnt + HEAP0))
1665 { 3288 {
1666 timers [active] = timers [timercnt]; 3289 timers [active] = timers [timercnt + HEAP0];
1667 adjustheap (timers, timercnt, active); 3290 adjustheap (timers, timercnt, active);
1668 } 3291 }
1669 } 3292 }
1670 3293
1671 ((WT)w)->at -= mn_now; 3294 ev_at (w) -= mn_now;
1672 3295
1673 ev_stop (EV_A_ (W)w); 3296 ev_stop (EV_A_ (W)w);
3297
3298 EV_FREQUENT_CHECK;
1674} 3299}
1675 3300
1676void noinline 3301void noinline
1677ev_timer_again (EV_P_ ev_timer *w) 3302ev_timer_again (EV_P_ ev_timer *w)
1678{ 3303{
3304 EV_FREQUENT_CHECK;
3305
3306 clear_pending (EV_A_ (W)w);
3307
1679 if (ev_is_active (w)) 3308 if (ev_is_active (w))
1680 { 3309 {
1681 if (w->repeat) 3310 if (w->repeat)
1682 { 3311 {
1683 ((WT)w)->at = mn_now + w->repeat; 3312 ev_at (w) = mn_now + w->repeat;
3313 ANHE_at_cache (timers [ev_active (w)]);
1684 adjustheap (timers, timercnt, ((W)w)->active - 1); 3314 adjustheap (timers, timercnt, ev_active (w));
1685 } 3315 }
1686 else 3316 else
1687 ev_timer_stop (EV_A_ w); 3317 ev_timer_stop (EV_A_ w);
1688 } 3318 }
1689 else if (w->repeat) 3319 else if (w->repeat)
1690 { 3320 {
1691 w->at = w->repeat; 3321 ev_at (w) = w->repeat;
1692 ev_timer_start (EV_A_ w); 3322 ev_timer_start (EV_A_ w);
1693 } 3323 }
3324
3325 EV_FREQUENT_CHECK;
3326}
3327
3328ev_tstamp
3329ev_timer_remaining (EV_P_ ev_timer *w)
3330{
3331 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1694} 3332}
1695 3333
1696#if EV_PERIODIC_ENABLE 3334#if EV_PERIODIC_ENABLE
1697void noinline 3335void noinline
1698ev_periodic_start (EV_P_ ev_periodic *w) 3336ev_periodic_start (EV_P_ ev_periodic *w)
1699{ 3337{
1700 if (expect_false (ev_is_active (w))) 3338 if (expect_false (ev_is_active (w)))
1701 return; 3339 return;
1702 3340
1703 if (w->reschedule_cb) 3341 if (w->reschedule_cb)
1704 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3342 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1705 else if (w->interval) 3343 else if (w->interval)
1706 { 3344 {
1707 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3345 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1708 /* this formula differs from the one in periodic_reify because we do not always round up */ 3346 periodic_recalc (EV_A_ w);
1709 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1710 } 3347 }
1711 else 3348 else
1712 ((WT)w)->at = w->offset; 3349 ev_at (w) = w->offset;
1713 3350
3351 EV_FREQUENT_CHECK;
3352
3353 ++periodiccnt;
1714 ev_start (EV_A_ (W)w, ++periodiccnt); 3354 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1715 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 3355 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1716 periodics [periodiccnt - 1] = (WT)w; 3356 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1717 upheap (periodics, periodiccnt - 1); 3357 ANHE_at_cache (periodics [ev_active (w)]);
3358 upheap (periodics, ev_active (w));
1718 3359
3360 EV_FREQUENT_CHECK;
3361
1719 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3362 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1720} 3363}
1721 3364
1722void noinline 3365void noinline
1723ev_periodic_stop (EV_P_ ev_periodic *w) 3366ev_periodic_stop (EV_P_ ev_periodic *w)
1724{ 3367{
1725 clear_pending (EV_A_ (W)w); 3368 clear_pending (EV_A_ (W)w);
1726 if (expect_false (!ev_is_active (w))) 3369 if (expect_false (!ev_is_active (w)))
1727 return; 3370 return;
1728 3371
1729 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3372 EV_FREQUENT_CHECK;
1730 3373
1731 { 3374 {
1732 int active = ((W)w)->active; 3375 int active = ev_active (w);
1733 3376
3377 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3378
3379 --periodiccnt;
3380
1734 if (expect_true (--active < --periodiccnt)) 3381 if (expect_true (active < periodiccnt + HEAP0))
1735 { 3382 {
1736 periodics [active] = periodics [periodiccnt]; 3383 periodics [active] = periodics [periodiccnt + HEAP0];
1737 adjustheap (periodics, periodiccnt, active); 3384 adjustheap (periodics, periodiccnt, active);
1738 } 3385 }
1739 } 3386 }
1740 3387
1741 ev_stop (EV_A_ (W)w); 3388 ev_stop (EV_A_ (W)w);
3389
3390 EV_FREQUENT_CHECK;
1742} 3391}
1743 3392
1744void noinline 3393void noinline
1745ev_periodic_again (EV_P_ ev_periodic *w) 3394ev_periodic_again (EV_P_ ev_periodic *w)
1746{ 3395{
… …
1752 3401
1753#ifndef SA_RESTART 3402#ifndef SA_RESTART
1754# define SA_RESTART 0 3403# define SA_RESTART 0
1755#endif 3404#endif
1756 3405
3406#if EV_SIGNAL_ENABLE
3407
1757void noinline 3408void noinline
1758ev_signal_start (EV_P_ ev_signal *w) 3409ev_signal_start (EV_P_ ev_signal *w)
1759{ 3410{
1760#if EV_MULTIPLICITY
1761 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1762#endif
1763 if (expect_false (ev_is_active (w))) 3411 if (expect_false (ev_is_active (w)))
1764 return; 3412 return;
1765 3413
1766 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3414 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1767 3415
3416#if EV_MULTIPLICITY
3417 assert (("libev: a signal must not be attached to two different loops",
3418 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3419
3420 signals [w->signum - 1].loop = EV_A;
3421#endif
3422
3423 EV_FREQUENT_CHECK;
3424
3425#if EV_USE_SIGNALFD
3426 if (sigfd == -2)
1768 { 3427 {
1769#ifndef _WIN32 3428 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1770 sigset_t full, prev; 3429 if (sigfd < 0 && errno == EINVAL)
1771 sigfillset (&full); 3430 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1772 sigprocmask (SIG_SETMASK, &full, &prev);
1773#endif
1774 3431
1775 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3432 if (sigfd >= 0)
3433 {
3434 fd_intern (sigfd); /* doing it twice will not hurt */
1776 3435
1777#ifndef _WIN32 3436 sigemptyset (&sigfd_set);
1778 sigprocmask (SIG_SETMASK, &prev, 0); 3437
1779#endif 3438 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3439 ev_set_priority (&sigfd_w, EV_MAXPRI);
3440 ev_io_start (EV_A_ &sigfd_w);
3441 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3442 }
1780 } 3443 }
3444
3445 if (sigfd >= 0)
3446 {
3447 /* TODO: check .head */
3448 sigaddset (&sigfd_set, w->signum);
3449 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3450
3451 signalfd (sigfd, &sigfd_set, 0);
3452 }
3453#endif
1781 3454
1782 ev_start (EV_A_ (W)w, 1); 3455 ev_start (EV_A_ (W)w, 1);
1783 wlist_add (&signals [w->signum - 1].head, (WL)w); 3456 wlist_add (&signals [w->signum - 1].head, (WL)w);
1784 3457
1785 if (!((WL)w)->next) 3458 if (!((WL)w)->next)
3459# if EV_USE_SIGNALFD
3460 if (sigfd < 0) /*TODO*/
3461# endif
1786 { 3462 {
1787#if _WIN32 3463# ifdef _WIN32
3464 evpipe_init (EV_A);
3465
1788 signal (w->signum, sighandler); 3466 signal (w->signum, ev_sighandler);
1789#else 3467# else
1790 struct sigaction sa; 3468 struct sigaction sa;
3469
3470 evpipe_init (EV_A);
3471
1791 sa.sa_handler = sighandler; 3472 sa.sa_handler = ev_sighandler;
1792 sigfillset (&sa.sa_mask); 3473 sigfillset (&sa.sa_mask);
1793 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3474 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1794 sigaction (w->signum, &sa, 0); 3475 sigaction (w->signum, &sa, 0);
3476
3477 if (origflags & EVFLAG_NOSIGMASK)
3478 {
3479 sigemptyset (&sa.sa_mask);
3480 sigaddset (&sa.sa_mask, w->signum);
3481 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3482 }
1795#endif 3483#endif
1796 } 3484 }
3485
3486 EV_FREQUENT_CHECK;
1797} 3487}
1798 3488
1799void noinline 3489void noinline
1800ev_signal_stop (EV_P_ ev_signal *w) 3490ev_signal_stop (EV_P_ ev_signal *w)
1801{ 3491{
1802 clear_pending (EV_A_ (W)w); 3492 clear_pending (EV_A_ (W)w);
1803 if (expect_false (!ev_is_active (w))) 3493 if (expect_false (!ev_is_active (w)))
1804 return; 3494 return;
1805 3495
3496 EV_FREQUENT_CHECK;
3497
1806 wlist_del (&signals [w->signum - 1].head, (WL)w); 3498 wlist_del (&signals [w->signum - 1].head, (WL)w);
1807 ev_stop (EV_A_ (W)w); 3499 ev_stop (EV_A_ (W)w);
1808 3500
1809 if (!signals [w->signum - 1].head) 3501 if (!signals [w->signum - 1].head)
3502 {
3503#if EV_MULTIPLICITY
3504 signals [w->signum - 1].loop = 0; /* unattach from signal */
3505#endif
3506#if EV_USE_SIGNALFD
3507 if (sigfd >= 0)
3508 {
3509 sigset_t ss;
3510
3511 sigemptyset (&ss);
3512 sigaddset (&ss, w->signum);
3513 sigdelset (&sigfd_set, w->signum);
3514
3515 signalfd (sigfd, &sigfd_set, 0);
3516 sigprocmask (SIG_UNBLOCK, &ss, 0);
3517 }
3518 else
3519#endif
1810 signal (w->signum, SIG_DFL); 3520 signal (w->signum, SIG_DFL);
3521 }
3522
3523 EV_FREQUENT_CHECK;
1811} 3524}
3525
3526#endif
3527
3528#if EV_CHILD_ENABLE
1812 3529
1813void 3530void
1814ev_child_start (EV_P_ ev_child *w) 3531ev_child_start (EV_P_ ev_child *w)
1815{ 3532{
1816#if EV_MULTIPLICITY 3533#if EV_MULTIPLICITY
1817 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3534 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1818#endif 3535#endif
1819 if (expect_false (ev_is_active (w))) 3536 if (expect_false (ev_is_active (w)))
1820 return; 3537 return;
1821 3538
3539 EV_FREQUENT_CHECK;
3540
1822 ev_start (EV_A_ (W)w, 1); 3541 ev_start (EV_A_ (W)w, 1);
1823 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3542 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3543
3544 EV_FREQUENT_CHECK;
1824} 3545}
1825 3546
1826void 3547void
1827ev_child_stop (EV_P_ ev_child *w) 3548ev_child_stop (EV_P_ ev_child *w)
1828{ 3549{
1829 clear_pending (EV_A_ (W)w); 3550 clear_pending (EV_A_ (W)w);
1830 if (expect_false (!ev_is_active (w))) 3551 if (expect_false (!ev_is_active (w)))
1831 return; 3552 return;
1832 3553
3554 EV_FREQUENT_CHECK;
3555
1833 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3556 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1834 ev_stop (EV_A_ (W)w); 3557 ev_stop (EV_A_ (W)w);
3558
3559 EV_FREQUENT_CHECK;
1835} 3560}
3561
3562#endif
1836 3563
1837#if EV_STAT_ENABLE 3564#if EV_STAT_ENABLE
1838 3565
1839# ifdef _WIN32 3566# ifdef _WIN32
1840# undef lstat 3567# undef lstat
1841# define lstat(a,b) _stati64 (a,b) 3568# define lstat(a,b) _stati64 (a,b)
1842# endif 3569# endif
1843 3570
1844#define DEF_STAT_INTERVAL 5.0074891 3571#define DEF_STAT_INTERVAL 5.0074891
3572#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1845#define MIN_STAT_INTERVAL 0.1074891 3573#define MIN_STAT_INTERVAL 0.1074891
1846 3574
1847static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3575static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1848 3576
1849#if EV_USE_INOTIFY 3577#if EV_USE_INOTIFY
1850# define EV_INOTIFY_BUFSIZE 8192 3578
3579/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3580# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1851 3581
1852static void noinline 3582static void noinline
1853infy_add (EV_P_ ev_stat *w) 3583infy_add (EV_P_ ev_stat *w)
1854{ 3584{
1855 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); 3585 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);
1856 3586
1857 if (w->wd < 0) 3587 if (w->wd >= 0)
3588 {
3589 struct statfs sfs;
3590
3591 /* now local changes will be tracked by inotify, but remote changes won't */
3592 /* unless the filesystem is known to be local, we therefore still poll */
3593 /* also do poll on <2.6.25, but with normal frequency */
3594
3595 if (!fs_2625)
3596 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3597 else if (!statfs (w->path, &sfs)
3598 && (sfs.f_type == 0x1373 /* devfs */
3599 || sfs.f_type == 0xEF53 /* ext2/3 */
3600 || sfs.f_type == 0x3153464a /* jfs */
3601 || sfs.f_type == 0x52654973 /* reiser3 */
3602 || sfs.f_type == 0x01021994 /* tempfs */
3603 || sfs.f_type == 0x58465342 /* xfs */))
3604 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3605 else
3606 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1858 { 3607 }
1859 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3608 else
3609 {
3610 /* can't use inotify, continue to stat */
3611 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1860 3612
1861 /* monitor some parent directory for speedup hints */ 3613 /* if path is not there, monitor some parent directory for speedup hints */
3614 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3615 /* but an efficiency issue only */
1862 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3616 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1863 { 3617 {
1864 char path [4096]; 3618 char path [4096];
1865 strcpy (path, w->path); 3619 strcpy (path, w->path);
1866 3620
… …
1869 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3623 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1870 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3624 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1871 3625
1872 char *pend = strrchr (path, '/'); 3626 char *pend = strrchr (path, '/');
1873 3627
1874 if (!pend) 3628 if (!pend || pend == path)
1875 break; /* whoops, no '/', complain to your admin */ 3629 break;
1876 3630
1877 *pend = 0; 3631 *pend = 0;
1878 w->wd = inotify_add_watch (fs_fd, path, mask); 3632 w->wd = inotify_add_watch (fs_fd, path, mask);
1879 } 3633 }
1880 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3634 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1881 } 3635 }
1882 } 3636 }
1883 else
1884 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1885 3637
1886 if (w->wd >= 0) 3638 if (w->wd >= 0)
1887 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3639 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3640
3641 /* now re-arm timer, if required */
3642 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3643 ev_timer_again (EV_A_ &w->timer);
3644 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1888} 3645}
1889 3646
1890static void noinline 3647static void noinline
1891infy_del (EV_P_ ev_stat *w) 3648infy_del (EV_P_ ev_stat *w)
1892{ 3649{
… …
1895 3652
1896 if (wd < 0) 3653 if (wd < 0)
1897 return; 3654 return;
1898 3655
1899 w->wd = -2; 3656 w->wd = -2;
1900 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3657 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1901 wlist_del (&fs_hash [slot].head, (WL)w); 3658 wlist_del (&fs_hash [slot].head, (WL)w);
1902 3659
1903 /* remove this watcher, if others are watching it, they will rearm */ 3660 /* remove this watcher, if others are watching it, they will rearm */
1904 inotify_rm_watch (fs_fd, wd); 3661 inotify_rm_watch (fs_fd, wd);
1905} 3662}
1906 3663
1907static void noinline 3664static void noinline
1908infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3665infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1909{ 3666{
1910 if (slot < 0) 3667 if (slot < 0)
1911 /* overflow, need to check for all hahs slots */ 3668 /* overflow, need to check for all hash slots */
1912 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3669 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1913 infy_wd (EV_A_ slot, wd, ev); 3670 infy_wd (EV_A_ slot, wd, ev);
1914 else 3671 else
1915 { 3672 {
1916 WL w_; 3673 WL w_;
1917 3674
1918 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3675 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1919 { 3676 {
1920 ev_stat *w = (ev_stat *)w_; 3677 ev_stat *w = (ev_stat *)w_;
1921 w_ = w_->next; /* lets us remove this watcher and all before it */ 3678 w_ = w_->next; /* lets us remove this watcher and all before it */
1922 3679
1923 if (w->wd == wd || wd == -1) 3680 if (w->wd == wd || wd == -1)
1924 { 3681 {
1925 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3682 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1926 { 3683 {
3684 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1927 w->wd = -1; 3685 w->wd = -1;
1928 infy_add (EV_A_ w); /* re-add, no matter what */ 3686 infy_add (EV_A_ w); /* re-add, no matter what */
1929 } 3687 }
1930 3688
1931 stat_timer_cb (EV_A_ &w->timer, 0); 3689 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1936 3694
1937static void 3695static void
1938infy_cb (EV_P_ ev_io *w, int revents) 3696infy_cb (EV_P_ ev_io *w, int revents)
1939{ 3697{
1940 char buf [EV_INOTIFY_BUFSIZE]; 3698 char buf [EV_INOTIFY_BUFSIZE];
1941 struct inotify_event *ev = (struct inotify_event *)buf;
1942 int ofs; 3699 int ofs;
1943 int len = read (fs_fd, buf, sizeof (buf)); 3700 int len = read (fs_fd, buf, sizeof (buf));
1944 3701
1945 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3702 for (ofs = 0; ofs < len; )
3703 {
3704 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1946 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3705 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3706 ofs += sizeof (struct inotify_event) + ev->len;
3707 }
1947} 3708}
1948 3709
1949void inline_size 3710inline_size void ecb_cold
3711ev_check_2625 (EV_P)
3712{
3713 /* kernels < 2.6.25 are borked
3714 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3715 */
3716 if (ev_linux_version () < 0x020619)
3717 return;
3718
3719 fs_2625 = 1;
3720}
3721
3722inline_size int
3723infy_newfd (void)
3724{
3725#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3726 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3727 if (fd >= 0)
3728 return fd;
3729#endif
3730 return inotify_init ();
3731}
3732
3733inline_size void
1950infy_init (EV_P) 3734infy_init (EV_P)
1951{ 3735{
1952 if (fs_fd != -2) 3736 if (fs_fd != -2)
1953 return; 3737 return;
1954 3738
3739 fs_fd = -1;
3740
3741 ev_check_2625 (EV_A);
3742
1955 fs_fd = inotify_init (); 3743 fs_fd = infy_newfd ();
1956 3744
1957 if (fs_fd >= 0) 3745 if (fs_fd >= 0)
1958 { 3746 {
3747 fd_intern (fs_fd);
1959 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3748 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1960 ev_set_priority (&fs_w, EV_MAXPRI); 3749 ev_set_priority (&fs_w, EV_MAXPRI);
1961 ev_io_start (EV_A_ &fs_w); 3750 ev_io_start (EV_A_ &fs_w);
3751 ev_unref (EV_A);
1962 } 3752 }
1963} 3753}
1964 3754
1965void inline_size 3755inline_size void
1966infy_fork (EV_P) 3756infy_fork (EV_P)
1967{ 3757{
1968 int slot; 3758 int slot;
1969 3759
1970 if (fs_fd < 0) 3760 if (fs_fd < 0)
1971 return; 3761 return;
1972 3762
3763 ev_ref (EV_A);
3764 ev_io_stop (EV_A_ &fs_w);
1973 close (fs_fd); 3765 close (fs_fd);
1974 fs_fd = inotify_init (); 3766 fs_fd = infy_newfd ();
1975 3767
3768 if (fs_fd >= 0)
3769 {
3770 fd_intern (fs_fd);
3771 ev_io_set (&fs_w, fs_fd, EV_READ);
3772 ev_io_start (EV_A_ &fs_w);
3773 ev_unref (EV_A);
3774 }
3775
1976 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3776 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1977 { 3777 {
1978 WL w_ = fs_hash [slot].head; 3778 WL w_ = fs_hash [slot].head;
1979 fs_hash [slot].head = 0; 3779 fs_hash [slot].head = 0;
1980 3780
1981 while (w_) 3781 while (w_)
… …
1986 w->wd = -1; 3786 w->wd = -1;
1987 3787
1988 if (fs_fd >= 0) 3788 if (fs_fd >= 0)
1989 infy_add (EV_A_ w); /* re-add, no matter what */ 3789 infy_add (EV_A_ w); /* re-add, no matter what */
1990 else 3790 else
3791 {
3792 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3793 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1991 ev_timer_start (EV_A_ &w->timer); 3794 ev_timer_again (EV_A_ &w->timer);
3795 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3796 }
1992 } 3797 }
1993
1994 } 3798 }
1995} 3799}
1996 3800
3801#endif
3802
3803#ifdef _WIN32
3804# define EV_LSTAT(p,b) _stati64 (p, b)
3805#else
3806# define EV_LSTAT(p,b) lstat (p, b)
1997#endif 3807#endif
1998 3808
1999void 3809void
2000ev_stat_stat (EV_P_ ev_stat *w) 3810ev_stat_stat (EV_P_ ev_stat *w)
2001{ 3811{
… …
2008static void noinline 3818static void noinline
2009stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3819stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2010{ 3820{
2011 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3821 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2012 3822
2013 /* we copy this here each the time so that */ 3823 ev_statdata prev = w->attr;
2014 /* prev has the old value when the callback gets invoked */
2015 w->prev = w->attr;
2016 ev_stat_stat (EV_A_ w); 3824 ev_stat_stat (EV_A_ w);
2017 3825
2018 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3826 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2019 if ( 3827 if (
2020 w->prev.st_dev != w->attr.st_dev 3828 prev.st_dev != w->attr.st_dev
2021 || w->prev.st_ino != w->attr.st_ino 3829 || prev.st_ino != w->attr.st_ino
2022 || w->prev.st_mode != w->attr.st_mode 3830 || prev.st_mode != w->attr.st_mode
2023 || w->prev.st_nlink != w->attr.st_nlink 3831 || prev.st_nlink != w->attr.st_nlink
2024 || w->prev.st_uid != w->attr.st_uid 3832 || prev.st_uid != w->attr.st_uid
2025 || w->prev.st_gid != w->attr.st_gid 3833 || prev.st_gid != w->attr.st_gid
2026 || w->prev.st_rdev != w->attr.st_rdev 3834 || prev.st_rdev != w->attr.st_rdev
2027 || w->prev.st_size != w->attr.st_size 3835 || prev.st_size != w->attr.st_size
2028 || w->prev.st_atime != w->attr.st_atime 3836 || prev.st_atime != w->attr.st_atime
2029 || w->prev.st_mtime != w->attr.st_mtime 3837 || prev.st_mtime != w->attr.st_mtime
2030 || w->prev.st_ctime != w->attr.st_ctime 3838 || prev.st_ctime != w->attr.st_ctime
2031 ) { 3839 ) {
3840 /* we only update w->prev on actual differences */
3841 /* in case we test more often than invoke the callback, */
3842 /* to ensure that prev is always different to attr */
3843 w->prev = prev;
3844
2032 #if EV_USE_INOTIFY 3845 #if EV_USE_INOTIFY
3846 if (fs_fd >= 0)
3847 {
2033 infy_del (EV_A_ w); 3848 infy_del (EV_A_ w);
2034 infy_add (EV_A_ w); 3849 infy_add (EV_A_ w);
2035 ev_stat_stat (EV_A_ w); /* avoid race... */ 3850 ev_stat_stat (EV_A_ w); /* avoid race... */
3851 }
2036 #endif 3852 #endif
2037 3853
2038 ev_feed_event (EV_A_ w, EV_STAT); 3854 ev_feed_event (EV_A_ w, EV_STAT);
2039 } 3855 }
2040} 3856}
… …
2043ev_stat_start (EV_P_ ev_stat *w) 3859ev_stat_start (EV_P_ ev_stat *w)
2044{ 3860{
2045 if (expect_false (ev_is_active (w))) 3861 if (expect_false (ev_is_active (w)))
2046 return; 3862 return;
2047 3863
2048 /* since we use memcmp, we need to clear any padding data etc. */
2049 memset (&w->prev, 0, sizeof (ev_statdata));
2050 memset (&w->attr, 0, sizeof (ev_statdata));
2051
2052 ev_stat_stat (EV_A_ w); 3864 ev_stat_stat (EV_A_ w);
2053 3865
3866 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2054 if (w->interval < MIN_STAT_INTERVAL) 3867 w->interval = MIN_STAT_INTERVAL;
2055 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2056 3868
2057 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3869 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2058 ev_set_priority (&w->timer, ev_priority (w)); 3870 ev_set_priority (&w->timer, ev_priority (w));
2059 3871
2060#if EV_USE_INOTIFY 3872#if EV_USE_INOTIFY
2061 infy_init (EV_A); 3873 infy_init (EV_A);
2062 3874
2063 if (fs_fd >= 0) 3875 if (fs_fd >= 0)
2064 infy_add (EV_A_ w); 3876 infy_add (EV_A_ w);
2065 else 3877 else
2066#endif 3878#endif
3879 {
2067 ev_timer_start (EV_A_ &w->timer); 3880 ev_timer_again (EV_A_ &w->timer);
3881 ev_unref (EV_A);
3882 }
2068 3883
2069 ev_start (EV_A_ (W)w, 1); 3884 ev_start (EV_A_ (W)w, 1);
3885
3886 EV_FREQUENT_CHECK;
2070} 3887}
2071 3888
2072void 3889void
2073ev_stat_stop (EV_P_ ev_stat *w) 3890ev_stat_stop (EV_P_ ev_stat *w)
2074{ 3891{
2075 clear_pending (EV_A_ (W)w); 3892 clear_pending (EV_A_ (W)w);
2076 if (expect_false (!ev_is_active (w))) 3893 if (expect_false (!ev_is_active (w)))
2077 return; 3894 return;
2078 3895
3896 EV_FREQUENT_CHECK;
3897
2079#if EV_USE_INOTIFY 3898#if EV_USE_INOTIFY
2080 infy_del (EV_A_ w); 3899 infy_del (EV_A_ w);
2081#endif 3900#endif
3901
3902 if (ev_is_active (&w->timer))
3903 {
3904 ev_ref (EV_A);
2082 ev_timer_stop (EV_A_ &w->timer); 3905 ev_timer_stop (EV_A_ &w->timer);
3906 }
2083 3907
2084 ev_stop (EV_A_ (W)w); 3908 ev_stop (EV_A_ (W)w);
3909
3910 EV_FREQUENT_CHECK;
2085} 3911}
2086#endif 3912#endif
2087 3913
2088#if EV_IDLE_ENABLE 3914#if EV_IDLE_ENABLE
2089void 3915void
… …
2092 if (expect_false (ev_is_active (w))) 3918 if (expect_false (ev_is_active (w)))
2093 return; 3919 return;
2094 3920
2095 pri_adjust (EV_A_ (W)w); 3921 pri_adjust (EV_A_ (W)w);
2096 3922
3923 EV_FREQUENT_CHECK;
3924
2097 { 3925 {
2098 int active = ++idlecnt [ABSPRI (w)]; 3926 int active = ++idlecnt [ABSPRI (w)];
2099 3927
2100 ++idleall; 3928 ++idleall;
2101 ev_start (EV_A_ (W)w, active); 3929 ev_start (EV_A_ (W)w, active);
2102 3930
2103 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3931 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2104 idles [ABSPRI (w)][active - 1] = w; 3932 idles [ABSPRI (w)][active - 1] = w;
2105 } 3933 }
3934
3935 EV_FREQUENT_CHECK;
2106} 3936}
2107 3937
2108void 3938void
2109ev_idle_stop (EV_P_ ev_idle *w) 3939ev_idle_stop (EV_P_ ev_idle *w)
2110{ 3940{
2111 clear_pending (EV_A_ (W)w); 3941 clear_pending (EV_A_ (W)w);
2112 if (expect_false (!ev_is_active (w))) 3942 if (expect_false (!ev_is_active (w)))
2113 return; 3943 return;
2114 3944
3945 EV_FREQUENT_CHECK;
3946
2115 { 3947 {
2116 int active = ((W)w)->active; 3948 int active = ev_active (w);
2117 3949
2118 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3950 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2119 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3951 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2120 3952
2121 ev_stop (EV_A_ (W)w); 3953 ev_stop (EV_A_ (W)w);
2122 --idleall; 3954 --idleall;
2123 } 3955 }
2124}
2125#endif
2126 3956
3957 EV_FREQUENT_CHECK;
3958}
3959#endif
3960
3961#if EV_PREPARE_ENABLE
2127void 3962void
2128ev_prepare_start (EV_P_ ev_prepare *w) 3963ev_prepare_start (EV_P_ ev_prepare *w)
2129{ 3964{
2130 if (expect_false (ev_is_active (w))) 3965 if (expect_false (ev_is_active (w)))
2131 return; 3966 return;
3967
3968 EV_FREQUENT_CHECK;
2132 3969
2133 ev_start (EV_A_ (W)w, ++preparecnt); 3970 ev_start (EV_A_ (W)w, ++preparecnt);
2134 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3971 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2135 prepares [preparecnt - 1] = w; 3972 prepares [preparecnt - 1] = w;
3973
3974 EV_FREQUENT_CHECK;
2136} 3975}
2137 3976
2138void 3977void
2139ev_prepare_stop (EV_P_ ev_prepare *w) 3978ev_prepare_stop (EV_P_ ev_prepare *w)
2140{ 3979{
2141 clear_pending (EV_A_ (W)w); 3980 clear_pending (EV_A_ (W)w);
2142 if (expect_false (!ev_is_active (w))) 3981 if (expect_false (!ev_is_active (w)))
2143 return; 3982 return;
2144 3983
3984 EV_FREQUENT_CHECK;
3985
2145 { 3986 {
2146 int active = ((W)w)->active; 3987 int active = ev_active (w);
3988
2147 prepares [active - 1] = prepares [--preparecnt]; 3989 prepares [active - 1] = prepares [--preparecnt];
2148 ((W)prepares [active - 1])->active = active; 3990 ev_active (prepares [active - 1]) = active;
2149 } 3991 }
2150 3992
2151 ev_stop (EV_A_ (W)w); 3993 ev_stop (EV_A_ (W)w);
2152}
2153 3994
3995 EV_FREQUENT_CHECK;
3996}
3997#endif
3998
3999#if EV_CHECK_ENABLE
2154void 4000void
2155ev_check_start (EV_P_ ev_check *w) 4001ev_check_start (EV_P_ ev_check *w)
2156{ 4002{
2157 if (expect_false (ev_is_active (w))) 4003 if (expect_false (ev_is_active (w)))
2158 return; 4004 return;
4005
4006 EV_FREQUENT_CHECK;
2159 4007
2160 ev_start (EV_A_ (W)w, ++checkcnt); 4008 ev_start (EV_A_ (W)w, ++checkcnt);
2161 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4009 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2162 checks [checkcnt - 1] = w; 4010 checks [checkcnt - 1] = w;
4011
4012 EV_FREQUENT_CHECK;
2163} 4013}
2164 4014
2165void 4015void
2166ev_check_stop (EV_P_ ev_check *w) 4016ev_check_stop (EV_P_ ev_check *w)
2167{ 4017{
2168 clear_pending (EV_A_ (W)w); 4018 clear_pending (EV_A_ (W)w);
2169 if (expect_false (!ev_is_active (w))) 4019 if (expect_false (!ev_is_active (w)))
2170 return; 4020 return;
2171 4021
4022 EV_FREQUENT_CHECK;
4023
2172 { 4024 {
2173 int active = ((W)w)->active; 4025 int active = ev_active (w);
4026
2174 checks [active - 1] = checks [--checkcnt]; 4027 checks [active - 1] = checks [--checkcnt];
2175 ((W)checks [active - 1])->active = active; 4028 ev_active (checks [active - 1]) = active;
2176 } 4029 }
2177 4030
2178 ev_stop (EV_A_ (W)w); 4031 ev_stop (EV_A_ (W)w);
4032
4033 EV_FREQUENT_CHECK;
2179} 4034}
4035#endif
2180 4036
2181#if EV_EMBED_ENABLE 4037#if EV_EMBED_ENABLE
2182void noinline 4038void noinline
2183ev_embed_sweep (EV_P_ ev_embed *w) 4039ev_embed_sweep (EV_P_ ev_embed *w)
2184{ 4040{
2185 ev_loop (w->loop, EVLOOP_NONBLOCK); 4041 ev_run (w->other, EVRUN_NOWAIT);
2186} 4042}
2187 4043
2188static void 4044static void
2189embed_cb (EV_P_ ev_io *io, int revents) 4045embed_io_cb (EV_P_ ev_io *io, int revents)
2190{ 4046{
2191 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4047 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2192 4048
2193 if (ev_cb (w)) 4049 if (ev_cb (w))
2194 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4050 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2195 else 4051 else
2196 ev_embed_sweep (loop, w); 4052 ev_run (w->other, EVRUN_NOWAIT);
2197} 4053}
4054
4055static void
4056embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4057{
4058 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4059
4060 {
4061 EV_P = w->other;
4062
4063 while (fdchangecnt)
4064 {
4065 fd_reify (EV_A);
4066 ev_run (EV_A_ EVRUN_NOWAIT);
4067 }
4068 }
4069}
4070
4071static void
4072embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4073{
4074 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4075
4076 ev_embed_stop (EV_A_ w);
4077
4078 {
4079 EV_P = w->other;
4080
4081 ev_loop_fork (EV_A);
4082 ev_run (EV_A_ EVRUN_NOWAIT);
4083 }
4084
4085 ev_embed_start (EV_A_ w);
4086}
4087
4088#if 0
4089static void
4090embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4091{
4092 ev_idle_stop (EV_A_ idle);
4093}
4094#endif
2198 4095
2199void 4096void
2200ev_embed_start (EV_P_ ev_embed *w) 4097ev_embed_start (EV_P_ ev_embed *w)
2201{ 4098{
2202 if (expect_false (ev_is_active (w))) 4099 if (expect_false (ev_is_active (w)))
2203 return; 4100 return;
2204 4101
2205 { 4102 {
2206 struct ev_loop *loop = w->loop; 4103 EV_P = w->other;
2207 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4104 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2208 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4105 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2209 } 4106 }
4107
4108 EV_FREQUENT_CHECK;
2210 4109
2211 ev_set_priority (&w->io, ev_priority (w)); 4110 ev_set_priority (&w->io, ev_priority (w));
2212 ev_io_start (EV_A_ &w->io); 4111 ev_io_start (EV_A_ &w->io);
2213 4112
4113 ev_prepare_init (&w->prepare, embed_prepare_cb);
4114 ev_set_priority (&w->prepare, EV_MINPRI);
4115 ev_prepare_start (EV_A_ &w->prepare);
4116
4117 ev_fork_init (&w->fork, embed_fork_cb);
4118 ev_fork_start (EV_A_ &w->fork);
4119
4120 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4121
2214 ev_start (EV_A_ (W)w, 1); 4122 ev_start (EV_A_ (W)w, 1);
4123
4124 EV_FREQUENT_CHECK;
2215} 4125}
2216 4126
2217void 4127void
2218ev_embed_stop (EV_P_ ev_embed *w) 4128ev_embed_stop (EV_P_ ev_embed *w)
2219{ 4129{
2220 clear_pending (EV_A_ (W)w); 4130 clear_pending (EV_A_ (W)w);
2221 if (expect_false (!ev_is_active (w))) 4131 if (expect_false (!ev_is_active (w)))
2222 return; 4132 return;
2223 4133
4134 EV_FREQUENT_CHECK;
4135
2224 ev_io_stop (EV_A_ &w->io); 4136 ev_io_stop (EV_A_ &w->io);
4137 ev_prepare_stop (EV_A_ &w->prepare);
4138 ev_fork_stop (EV_A_ &w->fork);
2225 4139
2226 ev_stop (EV_A_ (W)w); 4140 ev_stop (EV_A_ (W)w);
4141
4142 EV_FREQUENT_CHECK;
2227} 4143}
2228#endif 4144#endif
2229 4145
2230#if EV_FORK_ENABLE 4146#if EV_FORK_ENABLE
2231void 4147void
2232ev_fork_start (EV_P_ ev_fork *w) 4148ev_fork_start (EV_P_ ev_fork *w)
2233{ 4149{
2234 if (expect_false (ev_is_active (w))) 4150 if (expect_false (ev_is_active (w)))
2235 return; 4151 return;
2236 4152
4153 EV_FREQUENT_CHECK;
4154
2237 ev_start (EV_A_ (W)w, ++forkcnt); 4155 ev_start (EV_A_ (W)w, ++forkcnt);
2238 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4156 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2239 forks [forkcnt - 1] = w; 4157 forks [forkcnt - 1] = w;
4158
4159 EV_FREQUENT_CHECK;
2240} 4160}
2241 4161
2242void 4162void
2243ev_fork_stop (EV_P_ ev_fork *w) 4163ev_fork_stop (EV_P_ ev_fork *w)
2244{ 4164{
2245 clear_pending (EV_A_ (W)w); 4165 clear_pending (EV_A_ (W)w);
2246 if (expect_false (!ev_is_active (w))) 4166 if (expect_false (!ev_is_active (w)))
2247 return; 4167 return;
2248 4168
4169 EV_FREQUENT_CHECK;
4170
2249 { 4171 {
2250 int active = ((W)w)->active; 4172 int active = ev_active (w);
4173
2251 forks [active - 1] = forks [--forkcnt]; 4174 forks [active - 1] = forks [--forkcnt];
2252 ((W)forks [active - 1])->active = active; 4175 ev_active (forks [active - 1]) = active;
2253 } 4176 }
2254 4177
2255 ev_stop (EV_A_ (W)w); 4178 ev_stop (EV_A_ (W)w);
4179
4180 EV_FREQUENT_CHECK;
4181}
4182#endif
4183
4184#if EV_CLEANUP_ENABLE
4185void
4186ev_cleanup_start (EV_P_ ev_cleanup *w)
4187{
4188 if (expect_false (ev_is_active (w)))
4189 return;
4190
4191 EV_FREQUENT_CHECK;
4192
4193 ev_start (EV_A_ (W)w, ++cleanupcnt);
4194 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4195 cleanups [cleanupcnt - 1] = w;
4196
4197 /* cleanup watchers should never keep a refcount on the loop */
4198 ev_unref (EV_A);
4199 EV_FREQUENT_CHECK;
4200}
4201
4202void
4203ev_cleanup_stop (EV_P_ ev_cleanup *w)
4204{
4205 clear_pending (EV_A_ (W)w);
4206 if (expect_false (!ev_is_active (w)))
4207 return;
4208
4209 EV_FREQUENT_CHECK;
4210 ev_ref (EV_A);
4211
4212 {
4213 int active = ev_active (w);
4214
4215 cleanups [active - 1] = cleanups [--cleanupcnt];
4216 ev_active (cleanups [active - 1]) = active;
4217 }
4218
4219 ev_stop (EV_A_ (W)w);
4220
4221 EV_FREQUENT_CHECK;
4222}
4223#endif
4224
4225#if EV_ASYNC_ENABLE
4226void
4227ev_async_start (EV_P_ ev_async *w)
4228{
4229 if (expect_false (ev_is_active (w)))
4230 return;
4231
4232 w->sent = 0;
4233
4234 evpipe_init (EV_A);
4235
4236 EV_FREQUENT_CHECK;
4237
4238 ev_start (EV_A_ (W)w, ++asynccnt);
4239 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4240 asyncs [asynccnt - 1] = w;
4241
4242 EV_FREQUENT_CHECK;
4243}
4244
4245void
4246ev_async_stop (EV_P_ ev_async *w)
4247{
4248 clear_pending (EV_A_ (W)w);
4249 if (expect_false (!ev_is_active (w)))
4250 return;
4251
4252 EV_FREQUENT_CHECK;
4253
4254 {
4255 int active = ev_active (w);
4256
4257 asyncs [active - 1] = asyncs [--asynccnt];
4258 ev_active (asyncs [active - 1]) = active;
4259 }
4260
4261 ev_stop (EV_A_ (W)w);
4262
4263 EV_FREQUENT_CHECK;
4264}
4265
4266void
4267ev_async_send (EV_P_ ev_async *w)
4268{
4269 w->sent = 1;
4270 evpipe_write (EV_A_ &async_pending);
2256} 4271}
2257#endif 4272#endif
2258 4273
2259/*****************************************************************************/ 4274/*****************************************************************************/
2260 4275
… …
2270once_cb (EV_P_ struct ev_once *once, int revents) 4285once_cb (EV_P_ struct ev_once *once, int revents)
2271{ 4286{
2272 void (*cb)(int revents, void *arg) = once->cb; 4287 void (*cb)(int revents, void *arg) = once->cb;
2273 void *arg = once->arg; 4288 void *arg = once->arg;
2274 4289
2275 ev_io_stop (EV_A_ &once->io); 4290 ev_io_stop (EV_A_ &once->io);
2276 ev_timer_stop (EV_A_ &once->to); 4291 ev_timer_stop (EV_A_ &once->to);
2277 ev_free (once); 4292 ev_free (once);
2278 4293
2279 cb (revents, arg); 4294 cb (revents, arg);
2280} 4295}
2281 4296
2282static void 4297static void
2283once_cb_io (EV_P_ ev_io *w, int revents) 4298once_cb_io (EV_P_ ev_io *w, int revents)
2284{ 4299{
2285 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4300 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4301
4302 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2286} 4303}
2287 4304
2288static void 4305static void
2289once_cb_to (EV_P_ ev_timer *w, int revents) 4306once_cb_to (EV_P_ ev_timer *w, int revents)
2290{ 4307{
2291 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4308 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4309
4310 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2292} 4311}
2293 4312
2294void 4313void
2295ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4314ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2296{ 4315{
2297 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4316 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2298 4317
2299 if (expect_false (!once)) 4318 if (expect_false (!once))
2300 { 4319 {
2301 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4320 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2302 return; 4321 return;
2303 } 4322 }
2304 4323
2305 once->cb = cb; 4324 once->cb = cb;
2306 once->arg = arg; 4325 once->arg = arg;
… …
2318 ev_timer_set (&once->to, timeout, 0.); 4337 ev_timer_set (&once->to, timeout, 0.);
2319 ev_timer_start (EV_A_ &once->to); 4338 ev_timer_start (EV_A_ &once->to);
2320 } 4339 }
2321} 4340}
2322 4341
2323#ifdef __cplusplus 4342/*****************************************************************************/
2324} 4343
4344#if EV_WALK_ENABLE
4345void ecb_cold
4346ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4347{
4348 int i, j;
4349 ev_watcher_list *wl, *wn;
4350
4351 if (types & (EV_IO | EV_EMBED))
4352 for (i = 0; i < anfdmax; ++i)
4353 for (wl = anfds [i].head; wl; )
4354 {
4355 wn = wl->next;
4356
4357#if EV_EMBED_ENABLE
4358 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4359 {
4360 if (types & EV_EMBED)
4361 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4362 }
4363 else
4364#endif
4365#if EV_USE_INOTIFY
4366 if (ev_cb ((ev_io *)wl) == infy_cb)
4367 ;
4368 else
4369#endif
4370 if ((ev_io *)wl != &pipe_w)
4371 if (types & EV_IO)
4372 cb (EV_A_ EV_IO, wl);
4373
4374 wl = wn;
4375 }
4376
4377 if (types & (EV_TIMER | EV_STAT))
4378 for (i = timercnt + HEAP0; i-- > HEAP0; )
4379#if EV_STAT_ENABLE
4380 /*TODO: timer is not always active*/
4381 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4382 {
4383 if (types & EV_STAT)
4384 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4385 }
4386 else
4387#endif
4388 if (types & EV_TIMER)
4389 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4390
4391#if EV_PERIODIC_ENABLE
4392 if (types & EV_PERIODIC)
4393 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4394 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4395#endif
4396
4397#if EV_IDLE_ENABLE
4398 if (types & EV_IDLE)
4399 for (j = NUMPRI; j--; )
4400 for (i = idlecnt [j]; i--; )
4401 cb (EV_A_ EV_IDLE, idles [j][i]);
4402#endif
4403
4404#if EV_FORK_ENABLE
4405 if (types & EV_FORK)
4406 for (i = forkcnt; i--; )
4407 if (ev_cb (forks [i]) != embed_fork_cb)
4408 cb (EV_A_ EV_FORK, forks [i]);
4409#endif
4410
4411#if EV_ASYNC_ENABLE
4412 if (types & EV_ASYNC)
4413 for (i = asynccnt; i--; )
4414 cb (EV_A_ EV_ASYNC, asyncs [i]);
4415#endif
4416
4417#if EV_PREPARE_ENABLE
4418 if (types & EV_PREPARE)
4419 for (i = preparecnt; i--; )
4420# if EV_EMBED_ENABLE
4421 if (ev_cb (prepares [i]) != embed_prepare_cb)
2325#endif 4422# endif
4423 cb (EV_A_ EV_PREPARE, prepares [i]);
4424#endif
2326 4425
4426#if EV_CHECK_ENABLE
4427 if (types & EV_CHECK)
4428 for (i = checkcnt; i--; )
4429 cb (EV_A_ EV_CHECK, checks [i]);
4430#endif
4431
4432#if EV_SIGNAL_ENABLE
4433 if (types & EV_SIGNAL)
4434 for (i = 0; i < EV_NSIG - 1; ++i)
4435 for (wl = signals [i].head; wl; )
4436 {
4437 wn = wl->next;
4438 cb (EV_A_ EV_SIGNAL, wl);
4439 wl = wn;
4440 }
4441#endif
4442
4443#if EV_CHILD_ENABLE
4444 if (types & EV_CHILD)
4445 for (i = (EV_PID_HASHSIZE); i--; )
4446 for (wl = childs [i]; wl; )
4447 {
4448 wn = wl->next;
4449 cb (EV_A_ EV_CHILD, wl);
4450 wl = wn;
4451 }
4452#endif
4453/* EV_STAT 0x00001000 /* stat data changed */
4454/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4455}
4456#endif
4457
4458#if EV_MULTIPLICITY
4459 #include "ev_wrap.h"
4460#endif
4461

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