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Comparing libev/ev.c (file contents):
Revision 1.184 by root, Wed Dec 12 05:30:52 2007 UTC vs.
Revision 1.429 by root, Tue May 8 15:50:49 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) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
30 */ 38 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 43# include EV_CONFIG_H
39# else 44# else
40# include "config.h" 45# include "config.h"
41# endif 46# endif
42 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
43# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
46# endif 71# endif
47# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
49# endif 74# endif
50# else 75# else
51# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
53# endif 78# endif
54# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
56# endif 81# endif
57# endif 82# endif
58 83
84# if HAVE_NANOSLEEP
59# ifndef EV_USE_SELECT 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif 87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
65# endif 91# endif
66 92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
67# ifndef EV_USE_POLL 94# ifndef EV_USE_SELECT
68# if HAVE_POLL && HAVE_POLL_H 95# define EV_USE_SELECT EV_FEATURE_BACKENDS
69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
73# endif 109# endif
74 110
75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
78# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
79# define EV_USE_EPOLL 0
80# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
81# endif 118# endif
82 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
83# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
89# endif 127# endif
90 128
91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
93# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
94# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
95# define EV_USE_PORT 0
96# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
97# endif 136# endif
98 137
99# ifndef EV_USE_INOTIFY
100# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
101# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
102# else
103# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
104# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
105# endif 145# endif
106 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
107#endif 154# endif
108 155
109#include <math.h> 156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
110#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
111#include <fcntl.h> 169#include <fcntl.h>
112#include <stddef.h> 170#include <stddef.h>
113 171
114#include <stdio.h> 172#include <stdio.h>
115 173
116#include <assert.h> 174#include <assert.h>
117#include <errno.h> 175#include <errno.h>
118#include <sys/types.h> 176#include <sys/types.h>
119#include <time.h> 177#include <time.h>
178#include <limits.h>
120 179
121#include <signal.h> 180#include <signal.h>
122 181
123#ifdef EV_H 182#ifdef EV_H
124# include EV_H 183# include EV_H
125#else 184#else
126# include "ev.h" 185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
127#endif 197#endif
128 198
129#ifndef _WIN32 199#ifndef _WIN32
130# include <sys/time.h> 200# include <sys/time.h>
131# include <sys/wait.h> 201# include <sys/wait.h>
132# include <unistd.h> 202# include <unistd.h>
133#else 203#else
204# include <io.h>
134# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 206# include <windows.h>
207# include <winsock2.h>
136# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
138# endif 210# endif
211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
139#endif 261# endif
140 262#endif
141/**/
142 263
143#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
144# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
269# endif
145#endif 270#endif
146 271
147#ifndef EV_USE_REALTIME 272#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
274#endif
275
276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
280# define EV_USE_NANOSLEEP 0
281# endif
149#endif 282#endif
150 283
151#ifndef EV_USE_SELECT 284#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 286#endif
154 287
155#ifndef EV_USE_POLL 288#ifndef EV_USE_POLL
156# ifdef _WIN32 289# ifdef _WIN32
157# define EV_USE_POLL 0 290# define EV_USE_POLL 0
158# else 291# else
159# define EV_USE_POLL 1 292# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 293# endif
161#endif 294#endif
162 295
163#ifndef EV_USE_EPOLL 296#ifndef EV_USE_EPOLL
297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
299# else
164# define EV_USE_EPOLL 0 300# define EV_USE_EPOLL 0
301# endif
165#endif 302#endif
166 303
167#ifndef EV_USE_KQUEUE 304#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 305# define EV_USE_KQUEUE 0
169#endif 306#endif
… …
171#ifndef EV_USE_PORT 308#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 309# define EV_USE_PORT 0
173#endif 310#endif
174 311
175#ifndef EV_USE_INOTIFY 312#ifndef EV_USE_INOTIFY
313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314# define EV_USE_INOTIFY EV_FEATURE_OS
315# else
176# define EV_USE_INOTIFY 0 316# define EV_USE_INOTIFY 0
317# endif
177#endif 318#endif
178 319
179#ifndef EV_PID_HASHSIZE 320#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 322#endif
323
324#ifndef EV_INOTIFY_HASHSIZE
325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
326#endif
327
328#ifndef EV_USE_EVENTFD
329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
330# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 331# else
183# define EV_PID_HASHSIZE 16 332# define EV_USE_EVENTFD 0
184# endif 333# endif
185#endif 334#endif
186 335
187#ifndef EV_INOTIFY_HASHSIZE 336#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 338# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 339# else
191# define EV_INOTIFY_HASHSIZE 16 340# define EV_USE_SIGNALFD 0
192# endif 341# endif
193#endif 342#endif
194 343
195/**/ 344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
196 383
197#ifndef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 385# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 386# define EV_USE_MONOTONIC 0
200#endif 387#endif
… …
202#ifndef CLOCK_REALTIME 389#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 390# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 391# define EV_USE_REALTIME 0
205#endif 392#endif
206 393
394#if !EV_STAT_ENABLE
395# undef EV_USE_INOTIFY
396# define EV_USE_INOTIFY 0
397#endif
398
399#if !EV_USE_NANOSLEEP
400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
402# include <sys/select.h>
403# endif
404#endif
405
406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
413# endif
414#endif
415
207#if EV_SELECT_IS_WINSOCKET 416#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 417# include <winsock.h>
209#endif 418#endif
210 419
211#if !EV_STAT_ENABLE 420#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 421/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
422# include <stdint.h>
423# ifndef EFD_NONBLOCK
424# define EFD_NONBLOCK O_NONBLOCK
213#endif 425# endif
426# ifndef EFD_CLOEXEC
427# ifdef O_CLOEXEC
428# define EFD_CLOEXEC O_CLOEXEC
429# else
430# define EFD_CLOEXEC 02000000
431# endif
432# endif
433EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
434#endif
214 435
215#if EV_USE_INOTIFY 436#if EV_USE_SIGNALFD
437/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
216# include <sys/inotify.h> 438# include <stdint.h>
439# ifndef SFD_NONBLOCK
440# define SFD_NONBLOCK O_NONBLOCK
441# endif
442# ifndef SFD_CLOEXEC
443# ifdef O_CLOEXEC
444# define SFD_CLOEXEC O_CLOEXEC
445# else
446# define SFD_CLOEXEC 02000000
447# endif
448# endif
449EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
450
451struct signalfd_siginfo
452{
453 uint32_t ssi_signo;
454 char pad[128 - sizeof (uint32_t)];
455};
217#endif 456#endif
218 457
219/**/ 458/**/
220 459
460#if EV_VERIFY >= 3
461# define EV_FREQUENT_CHECK ev_verify (EV_A)
462#else
463# define EV_FREQUENT_CHECK do { } while (0)
464#endif
465
221/* 466/*
222 * This is used to avoid floating point rounding problems. 467 * This is used to work around floating point rounding problems.
223 * It is added to ev_rt_now when scheduling periodics
224 * to ensure progress, time-wise, even when rounding
225 * errors are against us.
226 * This value is good at least till the year 4000. 468 * This value is good at least till the year 4000.
227 * Better solutions welcome.
228 */ 469 */
229#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 470#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
471/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
230 472
231#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 473#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
232#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 474#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
233/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
234 475
476#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
477#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
478
479/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
480/* ECB.H BEGIN */
481/*
482 * libecb - http://software.schmorp.de/pkg/libecb
483 *
484 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
485 * Copyright (©) 2011 Emanuele Giaquinta
486 * All rights reserved.
487 *
488 * Redistribution and use in source and binary forms, with or without modifica-
489 * tion, are permitted provided that the following conditions are met:
490 *
491 * 1. Redistributions of source code must retain the above copyright notice,
492 * this list of conditions and the following disclaimer.
493 *
494 * 2. Redistributions in binary form must reproduce the above copyright
495 * notice, this list of conditions and the following disclaimer in the
496 * documentation and/or other materials provided with the distribution.
497 *
498 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
499 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
500 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
501 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
502 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
503 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
504 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
505 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
506 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
507 * OF THE POSSIBILITY OF SUCH DAMAGE.
508 */
509
510#ifndef ECB_H
511#define ECB_H
512
513#ifdef _WIN32
514 typedef signed char int8_t;
515 typedef unsigned char uint8_t;
516 typedef signed short int16_t;
517 typedef unsigned short uint16_t;
518 typedef signed int int32_t;
519 typedef unsigned int uint32_t;
235#if __GNUC__ >= 3 520 #if __GNUC__
236# define expect(expr,value) __builtin_expect ((expr),(value)) 521 typedef signed long long int64_t;
237# define noinline __attribute__ ((noinline)) 522 typedef unsigned long long uint64_t;
523 #else /* _MSC_VER || __BORLANDC__ */
524 typedef signed __int64 int64_t;
525 typedef unsigned __int64 uint64_t;
526 #endif
238#else 527#else
239# define expect(expr,value) (expr) 528 #include <inttypes.h>
240# define noinline
241# if __STDC_VERSION__ < 199901L
242# define inline
243# endif 529#endif
530
531/* many compilers define _GNUC_ to some versions but then only implement
532 * what their idiot authors think are the "more important" extensions,
533 * causing enormous grief in return for some better fake benchmark numbers.
534 * or so.
535 * we try to detect these and simply assume they are not gcc - if they have
536 * an issue with that they should have done it right in the first place.
537 */
538#ifndef ECB_GCC_VERSION
539 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
540 #define ECB_GCC_VERSION(major,minor) 0
541 #else
542 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
244#endif 543 #endif
544#endif
245 545
546/*****************************************************************************/
547
548/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
549/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
550
551#if ECB_NO_THREADS
552# define ECB_NO_SMP 1
553#endif
554
555#if ECB_NO_THREADS || ECB_NO_SMP
556 #define ECB_MEMORY_FENCE do { } while (0)
557#endif
558
559#ifndef ECB_MEMORY_FENCE
560 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
561 #if __i386 || __i386__
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
563 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
564 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
565 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
566 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
568 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
569 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
570 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
571 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
572 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
573 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
574 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
575 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
576 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
577 #elif __sparc || __sparc__
578 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
579 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
580 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
581 #elif defined __s390__ || defined __s390x__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
583 #elif defined __mips__
584 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
585 #elif defined __alpha__
586 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
587 #endif
588 #endif
589#endif
590
591#ifndef ECB_MEMORY_FENCE
592 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
593 #define ECB_MEMORY_FENCE __sync_synchronize ()
594 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
595 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
596 #elif _MSC_VER >= 1400 /* VC++ 2005 */
597 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
598 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
599 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
600 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
601 #elif defined _WIN32
602 #include <WinNT.h>
603 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
604 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
605 #include <mbarrier.h>
606 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
607 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
608 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
609 #elif __xlC__
610 #define ECB_MEMORY_FENCE __sync ()
611 #endif
612#endif
613
614#ifndef ECB_MEMORY_FENCE
615 #if !ECB_AVOID_PTHREADS
616 /*
617 * if you get undefined symbol references to pthread_mutex_lock,
618 * or failure to find pthread.h, then you should implement
619 * the ECB_MEMORY_FENCE operations for your cpu/compiler
620 * OR provide pthread.h and link against the posix thread library
621 * of your system.
622 */
623 #include <pthread.h>
624 #define ECB_NEEDS_PTHREADS 1
625 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
626
627 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
628 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
629 #endif
630#endif
631
632#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
633 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
634#endif
635
636#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
637 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
638#endif
639
640/*****************************************************************************/
641
642#define ECB_C99 (__STDC_VERSION__ >= 199901L)
643
644#if __cplusplus
645 #define ecb_inline static inline
646#elif ECB_GCC_VERSION(2,5)
647 #define ecb_inline static __inline__
648#elif ECB_C99
649 #define ecb_inline static inline
650#else
651 #define ecb_inline static
652#endif
653
654#if ECB_GCC_VERSION(3,3)
655 #define ecb_restrict __restrict__
656#elif ECB_C99
657 #define ecb_restrict restrict
658#else
659 #define ecb_restrict
660#endif
661
662typedef int ecb_bool;
663
664#define ECB_CONCAT_(a, b) a ## b
665#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
666#define ECB_STRINGIFY_(a) # a
667#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
668
669#define ecb_function_ ecb_inline
670
671#if ECB_GCC_VERSION(3,1)
672 #define ecb_attribute(attrlist) __attribute__(attrlist)
673 #define ecb_is_constant(expr) __builtin_constant_p (expr)
674 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
675 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
676#else
677 #define ecb_attribute(attrlist)
678 #define ecb_is_constant(expr) 0
679 #define ecb_expect(expr,value) (expr)
680 #define ecb_prefetch(addr,rw,locality)
681#endif
682
683/* no emulation for ecb_decltype */
684#if ECB_GCC_VERSION(4,5)
685 #define ecb_decltype(x) __decltype(x)
686#elif ECB_GCC_VERSION(3,0)
687 #define ecb_decltype(x) __typeof(x)
688#endif
689
690#define ecb_noinline ecb_attribute ((__noinline__))
691#define ecb_noreturn ecb_attribute ((__noreturn__))
692#define ecb_unused ecb_attribute ((__unused__))
693#define ecb_const ecb_attribute ((__const__))
694#define ecb_pure ecb_attribute ((__pure__))
695
696#if ECB_GCC_VERSION(4,3)
697 #define ecb_artificial ecb_attribute ((__artificial__))
698 #define ecb_hot ecb_attribute ((__hot__))
699 #define ecb_cold ecb_attribute ((__cold__))
700#else
701 #define ecb_artificial
702 #define ecb_hot
703 #define ecb_cold
704#endif
705
706/* put around conditional expressions if you are very sure that the */
707/* expression is mostly true or mostly false. note that these return */
708/* booleans, not the expression. */
246#define expect_false(expr) expect ((expr) != 0, 0) 709#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
247#define expect_true(expr) expect ((expr) != 0, 1) 710#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
711/* for compatibility to the rest of the world */
712#define ecb_likely(expr) ecb_expect_true (expr)
713#define ecb_unlikely(expr) ecb_expect_false (expr)
714
715/* count trailing zero bits and count # of one bits */
716#if ECB_GCC_VERSION(3,4)
717 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
718 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
719 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
720 #define ecb_ctz32(x) __builtin_ctz (x)
721 #define ecb_ctz64(x) __builtin_ctzll (x)
722 #define ecb_popcount32(x) __builtin_popcount (x)
723 /* no popcountll */
724#else
725 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
726 ecb_function_ int
727 ecb_ctz32 (uint32_t x)
728 {
729 int r = 0;
730
731 x &= ~x + 1; /* this isolates the lowest bit */
732
733#if ECB_branchless_on_i386
734 r += !!(x & 0xaaaaaaaa) << 0;
735 r += !!(x & 0xcccccccc) << 1;
736 r += !!(x & 0xf0f0f0f0) << 2;
737 r += !!(x & 0xff00ff00) << 3;
738 r += !!(x & 0xffff0000) << 4;
739#else
740 if (x & 0xaaaaaaaa) r += 1;
741 if (x & 0xcccccccc) r += 2;
742 if (x & 0xf0f0f0f0) r += 4;
743 if (x & 0xff00ff00) r += 8;
744 if (x & 0xffff0000) r += 16;
745#endif
746
747 return r;
748 }
749
750 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
751 ecb_function_ int
752 ecb_ctz64 (uint64_t x)
753 {
754 int shift = x & 0xffffffffU ? 0 : 32;
755 return ecb_ctz32 (x >> shift) + shift;
756 }
757
758 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
759 ecb_function_ int
760 ecb_popcount32 (uint32_t x)
761 {
762 x -= (x >> 1) & 0x55555555;
763 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
764 x = ((x >> 4) + x) & 0x0f0f0f0f;
765 x *= 0x01010101;
766
767 return x >> 24;
768 }
769
770 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
771 ecb_function_ int ecb_ld32 (uint32_t x)
772 {
773 int r = 0;
774
775 if (x >> 16) { x >>= 16; r += 16; }
776 if (x >> 8) { x >>= 8; r += 8; }
777 if (x >> 4) { x >>= 4; r += 4; }
778 if (x >> 2) { x >>= 2; r += 2; }
779 if (x >> 1) { r += 1; }
780
781 return r;
782 }
783
784 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
785 ecb_function_ int ecb_ld64 (uint64_t x)
786 {
787 int r = 0;
788
789 if (x >> 32) { x >>= 32; r += 32; }
790
791 return r + ecb_ld32 (x);
792 }
793#endif
794
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
796ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
797{
798 return ( (x * 0x0802U & 0x22110U)
799 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
800}
801
802ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
803ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
804{
805 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
806 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
807 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
808 x = ( x >> 8 ) | ( x << 8);
809
810 return x;
811}
812
813ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
814ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
815{
816 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
817 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
818 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
819 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
820 x = ( x >> 16 ) | ( x << 16);
821
822 return x;
823}
824
825/* popcount64 is only available on 64 bit cpus as gcc builtin */
826/* so for this version we are lazy */
827ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
828ecb_function_ int
829ecb_popcount64 (uint64_t x)
830{
831 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
832}
833
834ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
835ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
836ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
837ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
838ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
839ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
840ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
841ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
842
843ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
844ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
845ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
846ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
847ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
848ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
849ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
850ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
851
852#if ECB_GCC_VERSION(4,3)
853 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
854 #define ecb_bswap32(x) __builtin_bswap32 (x)
855 #define ecb_bswap64(x) __builtin_bswap64 (x)
856#else
857 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
858 ecb_function_ uint16_t
859 ecb_bswap16 (uint16_t x)
860 {
861 return ecb_rotl16 (x, 8);
862 }
863
864 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
865 ecb_function_ uint32_t
866 ecb_bswap32 (uint32_t x)
867 {
868 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
869 }
870
871 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
872 ecb_function_ uint64_t
873 ecb_bswap64 (uint64_t x)
874 {
875 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
876 }
877#endif
878
879#if ECB_GCC_VERSION(4,5)
880 #define ecb_unreachable() __builtin_unreachable ()
881#else
882 /* this seems to work fine, but gcc always emits a warning for it :/ */
883 ecb_inline void ecb_unreachable (void) ecb_noreturn;
884 ecb_inline void ecb_unreachable (void) { }
885#endif
886
887/* try to tell the compiler that some condition is definitely true */
888#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
889
890ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
891ecb_inline unsigned char
892ecb_byteorder_helper (void)
893{
894 const uint32_t u = 0x11223344;
895 return *(unsigned char *)&u;
896}
897
898ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
899ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
900ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
901ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
902
903#if ECB_GCC_VERSION(3,0) || ECB_C99
904 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
905#else
906 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
907#endif
908
909#if __cplusplus
910 template<typename T>
911 static inline T ecb_div_rd (T val, T div)
912 {
913 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
914 }
915 template<typename T>
916 static inline T ecb_div_ru (T val, T div)
917 {
918 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
919 }
920#else
921 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
922 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
923#endif
924
925#if ecb_cplusplus_does_not_suck
926 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
927 template<typename T, int N>
928 static inline int ecb_array_length (const T (&arr)[N])
929 {
930 return N;
931 }
932#else
933 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
934#endif
935
936#endif
937
938/* ECB.H END */
939
940#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
941/* if your architecture doesn't need memory fences, e.g. because it is
942 * single-cpu/core, or if you use libev in a project that doesn't use libev
943 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
944 * libev, in which cases the memory fences become nops.
945 * alternatively, you can remove this #error and link against libpthread,
946 * which will then provide the memory fences.
947 */
948# error "memory fences not defined for your architecture, please report"
949#endif
950
951#ifndef ECB_MEMORY_FENCE
952# define ECB_MEMORY_FENCE do { } while (0)
953# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
954# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
955#endif
956
957#define expect_false(cond) ecb_expect_false (cond)
958#define expect_true(cond) ecb_expect_true (cond)
959#define noinline ecb_noinline
960
248#define inline_size static inline 961#define inline_size ecb_inline
249 962
250#if EV_MINIMAL 963#if EV_FEATURE_CODE
964# define inline_speed ecb_inline
965#else
251# define inline_speed static noinline 966# define inline_speed static noinline
967#endif
968
969#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
970
971#if EV_MINPRI == EV_MAXPRI
972# define ABSPRI(w) (((W)w), 0)
252#else 973#else
253# define inline_speed static inline
254#endif
255
256#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
257#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 974# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
975#endif
258 976
259#define EMPTY /* required for microsofts broken pseudo-c compiler */ 977#define EMPTY /* required for microsofts broken pseudo-c compiler */
260#define EMPTY2(a,b) /* used to suppress some warnings */ 978#define EMPTY2(a,b) /* used to suppress some warnings */
261 979
262typedef ev_watcher *W; 980typedef ev_watcher *W;
263typedef ev_watcher_list *WL; 981typedef ev_watcher_list *WL;
264typedef ev_watcher_time *WT; 982typedef ev_watcher_time *WT;
265 983
984#define ev_active(w) ((W)(w))->active
985#define ev_at(w) ((WT)(w))->at
986
987#if EV_USE_REALTIME
988/* sig_atomic_t is used to avoid per-thread variables or locking but still */
989/* giving it a reasonably high chance of working on typical architectures */
990static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
991#endif
992
993#if EV_USE_MONOTONIC
266static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 994static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
995#endif
996
997#ifndef EV_FD_TO_WIN32_HANDLE
998# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
999#endif
1000#ifndef EV_WIN32_HANDLE_TO_FD
1001# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1002#endif
1003#ifndef EV_WIN32_CLOSE_FD
1004# define EV_WIN32_CLOSE_FD(fd) close (fd)
1005#endif
267 1006
268#ifdef _WIN32 1007#ifdef _WIN32
269# include "ev_win32.c" 1008# include "ev_win32.c"
270#endif 1009#endif
271 1010
272/*****************************************************************************/ 1011/*****************************************************************************/
273 1012
1013/* define a suitable floor function (only used by periodics atm) */
1014
1015#if EV_USE_FLOOR
1016# include <math.h>
1017# define ev_floor(v) floor (v)
1018#else
1019
1020#include <float.h>
1021
1022/* a floor() replacement function, should be independent of ev_tstamp type */
1023static ev_tstamp noinline
1024ev_floor (ev_tstamp v)
1025{
1026 /* the choice of shift factor is not terribly important */
1027#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1028 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1029#else
1030 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1031#endif
1032
1033 /* argument too large for an unsigned long? */
1034 if (expect_false (v >= shift))
1035 {
1036 ev_tstamp f;
1037
1038 if (v == v - 1.)
1039 return v; /* very large number */
1040
1041 f = shift * ev_floor (v * (1. / shift));
1042 return f + ev_floor (v - f);
1043 }
1044
1045 /* special treatment for negative args? */
1046 if (expect_false (v < 0.))
1047 {
1048 ev_tstamp f = -ev_floor (-v);
1049
1050 return f - (f == v ? 0 : 1);
1051 }
1052
1053 /* fits into an unsigned long */
1054 return (unsigned long)v;
1055}
1056
1057#endif
1058
1059/*****************************************************************************/
1060
1061#ifdef __linux
1062# include <sys/utsname.h>
1063#endif
1064
1065static unsigned int noinline ecb_cold
1066ev_linux_version (void)
1067{
1068#ifdef __linux
1069 unsigned int v = 0;
1070 struct utsname buf;
1071 int i;
1072 char *p = buf.release;
1073
1074 if (uname (&buf))
1075 return 0;
1076
1077 for (i = 3+1; --i; )
1078 {
1079 unsigned int c = 0;
1080
1081 for (;;)
1082 {
1083 if (*p >= '0' && *p <= '9')
1084 c = c * 10 + *p++ - '0';
1085 else
1086 {
1087 p += *p == '.';
1088 break;
1089 }
1090 }
1091
1092 v = (v << 8) | c;
1093 }
1094
1095 return v;
1096#else
1097 return 0;
1098#endif
1099}
1100
1101/*****************************************************************************/
1102
1103#if EV_AVOID_STDIO
1104static void noinline ecb_cold
1105ev_printerr (const char *msg)
1106{
1107 write (STDERR_FILENO, msg, strlen (msg));
1108}
1109#endif
1110
274static void (*syserr_cb)(const char *msg); 1111static void (*syserr_cb)(const char *msg) EV_THROW;
275 1112
276void 1113void ecb_cold
277ev_set_syserr_cb (void (*cb)(const char *msg)) 1114ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
278{ 1115{
279 syserr_cb = cb; 1116 syserr_cb = cb;
280} 1117}
281 1118
282static void noinline 1119static void noinline ecb_cold
283syserr (const char *msg) 1120ev_syserr (const char *msg)
284{ 1121{
285 if (!msg) 1122 if (!msg)
286 msg = "(libev) system error"; 1123 msg = "(libev) system error";
287 1124
288 if (syserr_cb) 1125 if (syserr_cb)
289 syserr_cb (msg); 1126 syserr_cb (msg);
290 else 1127 else
291 { 1128 {
1129#if EV_AVOID_STDIO
1130 ev_printerr (msg);
1131 ev_printerr (": ");
1132 ev_printerr (strerror (errno));
1133 ev_printerr ("\n");
1134#else
292 perror (msg); 1135 perror (msg);
1136#endif
293 abort (); 1137 abort ();
294 } 1138 }
295} 1139}
296 1140
1141static void *
1142ev_realloc_emul (void *ptr, long size)
1143{
1144#if __GLIBC__
1145 return realloc (ptr, size);
1146#else
1147 /* some systems, notably openbsd and darwin, fail to properly
1148 * implement realloc (x, 0) (as required by both ansi c-89 and
1149 * the single unix specification, so work around them here.
1150 */
1151
1152 if (size)
1153 return realloc (ptr, size);
1154
1155 free (ptr);
1156 return 0;
1157#endif
1158}
1159
297static void *(*alloc)(void *ptr, long size); 1160static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
298 1161
299void 1162void ecb_cold
300ev_set_allocator (void *(*cb)(void *ptr, long size)) 1163ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
301{ 1164{
302 alloc = cb; 1165 alloc = cb;
303} 1166}
304 1167
305inline_speed void * 1168inline_speed void *
306ev_realloc (void *ptr, long size) 1169ev_realloc (void *ptr, long size)
307{ 1170{
308 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1171 ptr = alloc (ptr, size);
309 1172
310 if (!ptr && size) 1173 if (!ptr && size)
311 { 1174 {
1175#if EV_AVOID_STDIO
1176 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1177#else
312 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1178 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1179#endif
313 abort (); 1180 abort ();
314 } 1181 }
315 1182
316 return ptr; 1183 return ptr;
317} 1184}
… …
319#define ev_malloc(size) ev_realloc (0, (size)) 1186#define ev_malloc(size) ev_realloc (0, (size))
320#define ev_free(ptr) ev_realloc ((ptr), 0) 1187#define ev_free(ptr) ev_realloc ((ptr), 0)
321 1188
322/*****************************************************************************/ 1189/*****************************************************************************/
323 1190
1191/* set in reify when reification needed */
1192#define EV_ANFD_REIFY 1
1193
1194/* file descriptor info structure */
324typedef struct 1195typedef struct
325{ 1196{
326 WL head; 1197 WL head;
327 unsigned char events; 1198 unsigned char events; /* the events watched for */
1199 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1200 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
328 unsigned char reify; 1201 unsigned char unused;
1202#if EV_USE_EPOLL
1203 unsigned int egen; /* generation counter to counter epoll bugs */
1204#endif
329#if EV_SELECT_IS_WINSOCKET 1205#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
330 SOCKET handle; 1206 SOCKET handle;
331#endif 1207#endif
1208#if EV_USE_IOCP
1209 OVERLAPPED or, ow;
1210#endif
332} ANFD; 1211} ANFD;
333 1212
1213/* stores the pending event set for a given watcher */
334typedef struct 1214typedef struct
335{ 1215{
336 W w; 1216 W w;
337 int events; 1217 int events; /* the pending event set for the given watcher */
338} ANPENDING; 1218} ANPENDING;
339 1219
340#if EV_USE_INOTIFY 1220#if EV_USE_INOTIFY
1221/* hash table entry per inotify-id */
341typedef struct 1222typedef struct
342{ 1223{
343 WL head; 1224 WL head;
344} ANFS; 1225} ANFS;
1226#endif
1227
1228/* Heap Entry */
1229#if EV_HEAP_CACHE_AT
1230 /* a heap element */
1231 typedef struct {
1232 ev_tstamp at;
1233 WT w;
1234 } ANHE;
1235
1236 #define ANHE_w(he) (he).w /* access watcher, read-write */
1237 #define ANHE_at(he) (he).at /* access cached at, read-only */
1238 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1239#else
1240 /* a heap element */
1241 typedef WT ANHE;
1242
1243 #define ANHE_w(he) (he)
1244 #define ANHE_at(he) (he)->at
1245 #define ANHE_at_cache(he)
345#endif 1246#endif
346 1247
347#if EV_MULTIPLICITY 1248#if EV_MULTIPLICITY
348 1249
349 struct ev_loop 1250 struct ev_loop
… …
355 #undef VAR 1256 #undef VAR
356 }; 1257 };
357 #include "ev_wrap.h" 1258 #include "ev_wrap.h"
358 1259
359 static struct ev_loop default_loop_struct; 1260 static struct ev_loop default_loop_struct;
360 struct ev_loop *ev_default_loop_ptr; 1261 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
361 1262
362#else 1263#else
363 1264
364 ev_tstamp ev_rt_now; 1265 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
365 #define VAR(name,decl) static decl; 1266 #define VAR(name,decl) static decl;
366 #include "ev_vars.h" 1267 #include "ev_vars.h"
367 #undef VAR 1268 #undef VAR
368 1269
369 static int ev_default_loop_ptr; 1270 static int ev_default_loop_ptr;
370 1271
371#endif 1272#endif
372 1273
1274#if EV_FEATURE_API
1275# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1276# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1277# define EV_INVOKE_PENDING invoke_cb (EV_A)
1278#else
1279# define EV_RELEASE_CB (void)0
1280# define EV_ACQUIRE_CB (void)0
1281# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1282#endif
1283
1284#define EVBREAK_RECURSE 0x80
1285
373/*****************************************************************************/ 1286/*****************************************************************************/
374 1287
1288#ifndef EV_HAVE_EV_TIME
375ev_tstamp 1289ev_tstamp
376ev_time (void) 1290ev_time (void) EV_THROW
377{ 1291{
378#if EV_USE_REALTIME 1292#if EV_USE_REALTIME
1293 if (expect_true (have_realtime))
1294 {
379 struct timespec ts; 1295 struct timespec ts;
380 clock_gettime (CLOCK_REALTIME, &ts); 1296 clock_gettime (CLOCK_REALTIME, &ts);
381 return ts.tv_sec + ts.tv_nsec * 1e-9; 1297 return ts.tv_sec + ts.tv_nsec * 1e-9;
382#else 1298 }
1299#endif
1300
383 struct timeval tv; 1301 struct timeval tv;
384 gettimeofday (&tv, 0); 1302 gettimeofday (&tv, 0);
385 return tv.tv_sec + tv.tv_usec * 1e-6; 1303 return tv.tv_sec + tv.tv_usec * 1e-6;
386#endif
387} 1304}
1305#endif
388 1306
389ev_tstamp inline_size 1307inline_size ev_tstamp
390get_clock (void) 1308get_clock (void)
391{ 1309{
392#if EV_USE_MONOTONIC 1310#if EV_USE_MONOTONIC
393 if (expect_true (have_monotonic)) 1311 if (expect_true (have_monotonic))
394 { 1312 {
… …
401 return ev_time (); 1319 return ev_time ();
402} 1320}
403 1321
404#if EV_MULTIPLICITY 1322#if EV_MULTIPLICITY
405ev_tstamp 1323ev_tstamp
406ev_now (EV_P) 1324ev_now (EV_P) EV_THROW
407{ 1325{
408 return ev_rt_now; 1326 return ev_rt_now;
409} 1327}
410#endif 1328#endif
411 1329
412int inline_size 1330void
1331ev_sleep (ev_tstamp delay) EV_THROW
1332{
1333 if (delay > 0.)
1334 {
1335#if EV_USE_NANOSLEEP
1336 struct timespec ts;
1337
1338 EV_TS_SET (ts, delay);
1339 nanosleep (&ts, 0);
1340#elif defined _WIN32
1341 Sleep ((unsigned long)(delay * 1e3));
1342#else
1343 struct timeval tv;
1344
1345 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1346 /* something not guaranteed by newer posix versions, but guaranteed */
1347 /* by older ones */
1348 EV_TV_SET (tv, delay);
1349 select (0, 0, 0, 0, &tv);
1350#endif
1351 }
1352}
1353
1354/*****************************************************************************/
1355
1356#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1357
1358/* find a suitable new size for the given array, */
1359/* hopefully by rounding to a nice-to-malloc size */
1360inline_size int
413array_nextsize (int elem, int cur, int cnt) 1361array_nextsize (int elem, int cur, int cnt)
414{ 1362{
415 int ncur = cur + 1; 1363 int ncur = cur + 1;
416 1364
417 do 1365 do
418 ncur <<= 1; 1366 ncur <<= 1;
419 while (cnt > ncur); 1367 while (cnt > ncur);
420 1368
421 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1369 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
422 if (elem * ncur > 4096) 1370 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
423 { 1371 {
424 ncur *= elem; 1372 ncur *= elem;
425 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1373 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
426 ncur = ncur - sizeof (void *) * 4; 1374 ncur = ncur - sizeof (void *) * 4;
427 ncur /= elem; 1375 ncur /= elem;
428 } 1376 }
429 1377
430 return ncur; 1378 return ncur;
431} 1379}
432 1380
433static noinline void * 1381static void * noinline ecb_cold
434array_realloc (int elem, void *base, int *cur, int cnt) 1382array_realloc (int elem, void *base, int *cur, int cnt)
435{ 1383{
436 *cur = array_nextsize (elem, *cur, cnt); 1384 *cur = array_nextsize (elem, *cur, cnt);
437 return ev_realloc (base, elem * *cur); 1385 return ev_realloc (base, elem * *cur);
438} 1386}
1387
1388#define array_init_zero(base,count) \
1389 memset ((void *)(base), 0, sizeof (*(base)) * (count))
439 1390
440#define array_needsize(type,base,cur,cnt,init) \ 1391#define array_needsize(type,base,cur,cnt,init) \
441 if (expect_false ((cnt) > (cur))) \ 1392 if (expect_false ((cnt) > (cur))) \
442 { \ 1393 { \
443 int ocur_ = (cur); \ 1394 int ecb_unused ocur_ = (cur); \
444 (base) = (type *)array_realloc \ 1395 (base) = (type *)array_realloc \
445 (sizeof (type), (base), &(cur), (cnt)); \ 1396 (sizeof (type), (base), &(cur), (cnt)); \
446 init ((base) + (ocur_), (cur) - ocur_); \ 1397 init ((base) + (ocur_), (cur) - ocur_); \
447 } 1398 }
448 1399
… …
455 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1406 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
456 } 1407 }
457#endif 1408#endif
458 1409
459#define array_free(stem, idx) \ 1410#define array_free(stem, idx) \
460 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1411 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
461 1412
462/*****************************************************************************/ 1413/*****************************************************************************/
463 1414
1415/* dummy callback for pending events */
1416static void noinline
1417pendingcb (EV_P_ ev_prepare *w, int revents)
1418{
1419}
1420
464void noinline 1421void noinline
465ev_feed_event (EV_P_ void *w, int revents) 1422ev_feed_event (EV_P_ void *w, int revents) EV_THROW
466{ 1423{
467 W w_ = (W)w; 1424 W w_ = (W)w;
468 int pri = ABSPRI (w_); 1425 int pri = ABSPRI (w_);
469 1426
470 if (expect_false (w_->pending)) 1427 if (expect_false (w_->pending))
… …
474 w_->pending = ++pendingcnt [pri]; 1431 w_->pending = ++pendingcnt [pri];
475 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1432 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
476 pendings [pri][w_->pending - 1].w = w_; 1433 pendings [pri][w_->pending - 1].w = w_;
477 pendings [pri][w_->pending - 1].events = revents; 1434 pendings [pri][w_->pending - 1].events = revents;
478 } 1435 }
479}
480 1436
481void inline_speed 1437 pendingpri = NUMPRI - 1;
1438}
1439
1440inline_speed void
1441feed_reverse (EV_P_ W w)
1442{
1443 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1444 rfeeds [rfeedcnt++] = w;
1445}
1446
1447inline_size void
1448feed_reverse_done (EV_P_ int revents)
1449{
1450 do
1451 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1452 while (rfeedcnt);
1453}
1454
1455inline_speed void
482queue_events (EV_P_ W *events, int eventcnt, int type) 1456queue_events (EV_P_ W *events, int eventcnt, int type)
483{ 1457{
484 int i; 1458 int i;
485 1459
486 for (i = 0; i < eventcnt; ++i) 1460 for (i = 0; i < eventcnt; ++i)
487 ev_feed_event (EV_A_ events [i], type); 1461 ev_feed_event (EV_A_ events [i], type);
488} 1462}
489 1463
490/*****************************************************************************/ 1464/*****************************************************************************/
491 1465
492void inline_size 1466inline_speed void
493anfds_init (ANFD *base, int count)
494{
495 while (count--)
496 {
497 base->head = 0;
498 base->events = EV_NONE;
499 base->reify = 0;
500
501 ++base;
502 }
503}
504
505void inline_speed
506fd_event (EV_P_ int fd, int revents) 1467fd_event_nocheck (EV_P_ int fd, int revents)
507{ 1468{
508 ANFD *anfd = anfds + fd; 1469 ANFD *anfd = anfds + fd;
509 ev_io *w; 1470 ev_io *w;
510 1471
511 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1472 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
515 if (ev) 1476 if (ev)
516 ev_feed_event (EV_A_ (W)w, ev); 1477 ev_feed_event (EV_A_ (W)w, ev);
517 } 1478 }
518} 1479}
519 1480
1481/* do not submit kernel events for fds that have reify set */
1482/* because that means they changed while we were polling for new events */
1483inline_speed void
1484fd_event (EV_P_ int fd, int revents)
1485{
1486 ANFD *anfd = anfds + fd;
1487
1488 if (expect_true (!anfd->reify))
1489 fd_event_nocheck (EV_A_ fd, revents);
1490}
1491
520void 1492void
521ev_feed_fd_event (EV_P_ int fd, int revents) 1493ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
522{ 1494{
523 if (fd >= 0 && fd < anfdmax) 1495 if (fd >= 0 && fd < anfdmax)
524 fd_event (EV_A_ fd, revents); 1496 fd_event_nocheck (EV_A_ fd, revents);
525} 1497}
526 1498
527void inline_size 1499/* make sure the external fd watch events are in-sync */
1500/* with the kernel/libev internal state */
1501inline_size void
528fd_reify (EV_P) 1502fd_reify (EV_P)
529{ 1503{
530 int i; 1504 int i;
1505
1506#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1507 for (i = 0; i < fdchangecnt; ++i)
1508 {
1509 int fd = fdchanges [i];
1510 ANFD *anfd = anfds + fd;
1511
1512 if (anfd->reify & EV__IOFDSET && anfd->head)
1513 {
1514 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1515
1516 if (handle != anfd->handle)
1517 {
1518 unsigned long arg;
1519
1520 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1521
1522 /* handle changed, but fd didn't - we need to do it in two steps */
1523 backend_modify (EV_A_ fd, anfd->events, 0);
1524 anfd->events = 0;
1525 anfd->handle = handle;
1526 }
1527 }
1528 }
1529#endif
531 1530
532 for (i = 0; i < fdchangecnt; ++i) 1531 for (i = 0; i < fdchangecnt; ++i)
533 { 1532 {
534 int fd = fdchanges [i]; 1533 int fd = fdchanges [i];
535 ANFD *anfd = anfds + fd; 1534 ANFD *anfd = anfds + fd;
536 ev_io *w; 1535 ev_io *w;
537 1536
538 unsigned char events = 0; 1537 unsigned char o_events = anfd->events;
1538 unsigned char o_reify = anfd->reify;
539 1539
540 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1540 anfd->reify = 0;
541 events |= (unsigned char)w->events;
542 1541
543#if EV_SELECT_IS_WINSOCKET 1542 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
544 if (events)
545 { 1543 {
546 unsigned long argp; 1544 anfd->events = 0;
547 anfd->handle = _get_osfhandle (fd); 1545
548 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1546 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1547 anfd->events |= (unsigned char)w->events;
1548
1549 if (o_events != anfd->events)
1550 o_reify = EV__IOFDSET; /* actually |= */
549 } 1551 }
550#endif
551 1552
552 { 1553 if (o_reify & EV__IOFDSET)
553 unsigned char o_events = anfd->events;
554 unsigned char o_reify = anfd->reify;
555
556 anfd->reify = 0;
557 anfd->events = events;
558
559 if (o_events != events || o_reify & EV_IOFDSET)
560 backend_modify (EV_A_ fd, o_events, events); 1554 backend_modify (EV_A_ fd, o_events, anfd->events);
561 }
562 } 1555 }
563 1556
564 fdchangecnt = 0; 1557 fdchangecnt = 0;
565} 1558}
566 1559
567void inline_size 1560/* something about the given fd changed */
1561inline_size void
568fd_change (EV_P_ int fd, int flags) 1562fd_change (EV_P_ int fd, int flags)
569{ 1563{
570 unsigned char reify = anfds [fd].reify; 1564 unsigned char reify = anfds [fd].reify;
571 anfds [fd].reify |= flags; 1565 anfds [fd].reify |= flags;
572 1566
… …
576 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1570 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
577 fdchanges [fdchangecnt - 1] = fd; 1571 fdchanges [fdchangecnt - 1] = fd;
578 } 1572 }
579} 1573}
580 1574
581void inline_speed 1575/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1576inline_speed void ecb_cold
582fd_kill (EV_P_ int fd) 1577fd_kill (EV_P_ int fd)
583{ 1578{
584 ev_io *w; 1579 ev_io *w;
585 1580
586 while ((w = (ev_io *)anfds [fd].head)) 1581 while ((w = (ev_io *)anfds [fd].head))
… …
588 ev_io_stop (EV_A_ w); 1583 ev_io_stop (EV_A_ w);
589 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1584 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
590 } 1585 }
591} 1586}
592 1587
593int inline_size 1588/* check whether the given fd is actually valid, for error recovery */
1589inline_size int ecb_cold
594fd_valid (int fd) 1590fd_valid (int fd)
595{ 1591{
596#ifdef _WIN32 1592#ifdef _WIN32
597 return _get_osfhandle (fd) != -1; 1593 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
598#else 1594#else
599 return fcntl (fd, F_GETFD) != -1; 1595 return fcntl (fd, F_GETFD) != -1;
600#endif 1596#endif
601} 1597}
602 1598
603/* called on EBADF to verify fds */ 1599/* called on EBADF to verify fds */
604static void noinline 1600static void noinline ecb_cold
605fd_ebadf (EV_P) 1601fd_ebadf (EV_P)
606{ 1602{
607 int fd; 1603 int fd;
608 1604
609 for (fd = 0; fd < anfdmax; ++fd) 1605 for (fd = 0; fd < anfdmax; ++fd)
610 if (anfds [fd].events) 1606 if (anfds [fd].events)
611 if (!fd_valid (fd) == -1 && errno == EBADF) 1607 if (!fd_valid (fd) && errno == EBADF)
612 fd_kill (EV_A_ fd); 1608 fd_kill (EV_A_ fd);
613} 1609}
614 1610
615/* called on ENOMEM in select/poll to kill some fds and retry */ 1611/* called on ENOMEM in select/poll to kill some fds and retry */
616static void noinline 1612static void noinline ecb_cold
617fd_enomem (EV_P) 1613fd_enomem (EV_P)
618{ 1614{
619 int fd; 1615 int fd;
620 1616
621 for (fd = anfdmax; fd--; ) 1617 for (fd = anfdmax; fd--; )
622 if (anfds [fd].events) 1618 if (anfds [fd].events)
623 { 1619 {
624 fd_kill (EV_A_ fd); 1620 fd_kill (EV_A_ fd);
625 return; 1621 break;
626 } 1622 }
627} 1623}
628 1624
629/* usually called after fork if backend needs to re-arm all fds from scratch */ 1625/* usually called after fork if backend needs to re-arm all fds from scratch */
630static void noinline 1626static void noinline
… …
634 1630
635 for (fd = 0; fd < anfdmax; ++fd) 1631 for (fd = 0; fd < anfdmax; ++fd)
636 if (anfds [fd].events) 1632 if (anfds [fd].events)
637 { 1633 {
638 anfds [fd].events = 0; 1634 anfds [fd].events = 0;
1635 anfds [fd].emask = 0;
639 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1636 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
640 } 1637 }
641} 1638}
642 1639
643/*****************************************************************************/ 1640/* used to prepare libev internal fd's */
644 1641/* this is not fork-safe */
645void inline_speed 1642inline_speed void
646upheap (WT *heap, int k)
647{
648 WT w = heap [k];
649
650 while (k)
651 {
652 int p = (k - 1) >> 1;
653
654 if (heap [p]->at <= w->at)
655 break;
656
657 heap [k] = heap [p];
658 ((W)heap [k])->active = k + 1;
659 k = p;
660 }
661
662 heap [k] = w;
663 ((W)heap [k])->active = k + 1;
664}
665
666void inline_speed
667downheap (WT *heap, int N, int k)
668{
669 WT w = heap [k];
670
671 for (;;)
672 {
673 int c = (k << 1) + 1;
674
675 if (c >= N)
676 break;
677
678 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
679 ? 1 : 0;
680
681 if (w->at <= heap [c]->at)
682 break;
683
684 heap [k] = heap [c];
685 ((W)heap [k])->active = k + 1;
686
687 k = c;
688 }
689
690 heap [k] = w;
691 ((W)heap [k])->active = k + 1;
692}
693
694void inline_size
695adjustheap (WT *heap, int N, int k)
696{
697 upheap (heap, k);
698 downheap (heap, N, k);
699}
700
701/*****************************************************************************/
702
703typedef struct
704{
705 WL head;
706 sig_atomic_t volatile gotsig;
707} ANSIG;
708
709static ANSIG *signals;
710static int signalmax;
711
712static int sigpipe [2];
713static sig_atomic_t volatile gotsig;
714static ev_io sigev;
715
716void inline_size
717signals_init (ANSIG *base, int count)
718{
719 while (count--)
720 {
721 base->head = 0;
722 base->gotsig = 0;
723
724 ++base;
725 }
726}
727
728static void
729sighandler (int signum)
730{
731#if _WIN32
732 signal (signum, sighandler);
733#endif
734
735 signals [signum - 1].gotsig = 1;
736
737 if (!gotsig)
738 {
739 int old_errno = errno;
740 gotsig = 1;
741 write (sigpipe [1], &signum, 1);
742 errno = old_errno;
743 }
744}
745
746void noinline
747ev_feed_signal_event (EV_P_ int signum)
748{
749 WL w;
750
751#if EV_MULTIPLICITY
752 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
753#endif
754
755 --signum;
756
757 if (signum < 0 || signum >= signalmax)
758 return;
759
760 signals [signum].gotsig = 0;
761
762 for (w = signals [signum].head; w; w = w->next)
763 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
764}
765
766static void
767sigcb (EV_P_ ev_io *iow, int revents)
768{
769 int signum;
770
771 read (sigpipe [0], &revents, 1);
772 gotsig = 0;
773
774 for (signum = signalmax; signum--; )
775 if (signals [signum].gotsig)
776 ev_feed_signal_event (EV_A_ signum + 1);
777}
778
779void inline_speed
780fd_intern (int fd) 1643fd_intern (int fd)
781{ 1644{
782#ifdef _WIN32 1645#ifdef _WIN32
783 int arg = 1; 1646 unsigned long arg = 1;
784 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1647 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
785#else 1648#else
786 fcntl (fd, F_SETFD, FD_CLOEXEC); 1649 fcntl (fd, F_SETFD, FD_CLOEXEC);
787 fcntl (fd, F_SETFL, O_NONBLOCK); 1650 fcntl (fd, F_SETFL, O_NONBLOCK);
788#endif 1651#endif
789} 1652}
790 1653
791static void noinline
792siginit (EV_P)
793{
794 fd_intern (sigpipe [0]);
795 fd_intern (sigpipe [1]);
796
797 ev_io_set (&sigev, sigpipe [0], EV_READ);
798 ev_io_start (EV_A_ &sigev);
799 ev_unref (EV_A); /* child watcher should not keep loop alive */
800}
801
802/*****************************************************************************/ 1654/*****************************************************************************/
803 1655
1656/*
1657 * the heap functions want a real array index. array index 0 is guaranteed to not
1658 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1659 * the branching factor of the d-tree.
1660 */
1661
1662/*
1663 * at the moment we allow libev the luxury of two heaps,
1664 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1665 * which is more cache-efficient.
1666 * the difference is about 5% with 50000+ watchers.
1667 */
1668#if EV_USE_4HEAP
1669
1670#define DHEAP 4
1671#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1672#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1673#define UPHEAP_DONE(p,k) ((p) == (k))
1674
1675/* away from the root */
1676inline_speed void
1677downheap (ANHE *heap, int N, int k)
1678{
1679 ANHE he = heap [k];
1680 ANHE *E = heap + N + HEAP0;
1681
1682 for (;;)
1683 {
1684 ev_tstamp minat;
1685 ANHE *minpos;
1686 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1687
1688 /* find minimum child */
1689 if (expect_true (pos + DHEAP - 1 < E))
1690 {
1691 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1692 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1693 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1694 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1695 }
1696 else if (pos < E)
1697 {
1698 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1699 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1700 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1701 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1702 }
1703 else
1704 break;
1705
1706 if (ANHE_at (he) <= minat)
1707 break;
1708
1709 heap [k] = *minpos;
1710 ev_active (ANHE_w (*minpos)) = k;
1711
1712 k = minpos - heap;
1713 }
1714
1715 heap [k] = he;
1716 ev_active (ANHE_w (he)) = k;
1717}
1718
1719#else /* 4HEAP */
1720
1721#define HEAP0 1
1722#define HPARENT(k) ((k) >> 1)
1723#define UPHEAP_DONE(p,k) (!(p))
1724
1725/* away from the root */
1726inline_speed void
1727downheap (ANHE *heap, int N, int k)
1728{
1729 ANHE he = heap [k];
1730
1731 for (;;)
1732 {
1733 int c = k << 1;
1734
1735 if (c >= N + HEAP0)
1736 break;
1737
1738 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1739 ? 1 : 0;
1740
1741 if (ANHE_at (he) <= ANHE_at (heap [c]))
1742 break;
1743
1744 heap [k] = heap [c];
1745 ev_active (ANHE_w (heap [k])) = k;
1746
1747 k = c;
1748 }
1749
1750 heap [k] = he;
1751 ev_active (ANHE_w (he)) = k;
1752}
1753#endif
1754
1755/* towards the root */
1756inline_speed void
1757upheap (ANHE *heap, int k)
1758{
1759 ANHE he = heap [k];
1760
1761 for (;;)
1762 {
1763 int p = HPARENT (k);
1764
1765 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1766 break;
1767
1768 heap [k] = heap [p];
1769 ev_active (ANHE_w (heap [k])) = k;
1770 k = p;
1771 }
1772
1773 heap [k] = he;
1774 ev_active (ANHE_w (he)) = k;
1775}
1776
1777/* move an element suitably so it is in a correct place */
1778inline_size void
1779adjustheap (ANHE *heap, int N, int k)
1780{
1781 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1782 upheap (heap, k);
1783 else
1784 downheap (heap, N, k);
1785}
1786
1787/* rebuild the heap: this function is used only once and executed rarely */
1788inline_size void
1789reheap (ANHE *heap, int N)
1790{
1791 int i;
1792
1793 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1794 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1795 for (i = 0; i < N; ++i)
1796 upheap (heap, i + HEAP0);
1797}
1798
1799/*****************************************************************************/
1800
1801/* associate signal watchers to a signal signal */
1802typedef struct
1803{
1804 EV_ATOMIC_T pending;
1805#if EV_MULTIPLICITY
1806 EV_P;
1807#endif
1808 WL head;
1809} ANSIG;
1810
1811static ANSIG signals [EV_NSIG - 1];
1812
1813/*****************************************************************************/
1814
1815#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1816
1817static void noinline ecb_cold
1818evpipe_init (EV_P)
1819{
1820 if (!ev_is_active (&pipe_w))
1821 {
1822# if EV_USE_EVENTFD
1823 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1824 if (evfd < 0 && errno == EINVAL)
1825 evfd = eventfd (0, 0);
1826
1827 if (evfd >= 0)
1828 {
1829 evpipe [0] = -1;
1830 fd_intern (evfd); /* doing it twice doesn't hurt */
1831 ev_io_set (&pipe_w, evfd, EV_READ);
1832 }
1833 else
1834# endif
1835 {
1836 while (pipe (evpipe))
1837 ev_syserr ("(libev) error creating signal/async pipe");
1838
1839 fd_intern (evpipe [0]);
1840 fd_intern (evpipe [1]);
1841 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1842 }
1843
1844 ev_io_start (EV_A_ &pipe_w);
1845 ev_unref (EV_A); /* watcher should not keep loop alive */
1846 }
1847}
1848
1849inline_speed void
1850evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1851{
1852 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1853
1854 if (expect_true (*flag))
1855 return;
1856
1857 *flag = 1;
1858
1859 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1860
1861 pipe_write_skipped = 1;
1862
1863 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1864
1865 if (pipe_write_wanted)
1866 {
1867 int old_errno;
1868
1869 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1870
1871 old_errno = errno; /* save errno because write will clobber it */
1872
1873#if EV_USE_EVENTFD
1874 if (evfd >= 0)
1875 {
1876 uint64_t counter = 1;
1877 write (evfd, &counter, sizeof (uint64_t));
1878 }
1879 else
1880#endif
1881 {
1882#ifdef _WIN32
1883 WSABUF buf;
1884 DWORD sent;
1885 buf.buf = &buf;
1886 buf.len = 1;
1887 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1888#else
1889 write (evpipe [1], &(evpipe [1]), 1);
1890#endif
1891 }
1892
1893 errno = old_errno;
1894 }
1895}
1896
1897/* called whenever the libev signal pipe */
1898/* got some events (signal, async) */
1899static void
1900pipecb (EV_P_ ev_io *iow, int revents)
1901{
1902 int i;
1903
1904 if (revents & EV_READ)
1905 {
1906#if EV_USE_EVENTFD
1907 if (evfd >= 0)
1908 {
1909 uint64_t counter;
1910 read (evfd, &counter, sizeof (uint64_t));
1911 }
1912 else
1913#endif
1914 {
1915 char dummy[4];
1916#ifdef _WIN32
1917 WSABUF buf;
1918 DWORD recvd;
1919 buf.buf = dummy;
1920 buf.len = sizeof (dummy);
1921 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, 0, 0, 0);
1922#else
1923 read (evpipe [0], &dummy, sizeof (dummy));
1924#endif
1925 }
1926 }
1927
1928 pipe_write_skipped = 0;
1929
1930 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1931
1932#if EV_SIGNAL_ENABLE
1933 if (sig_pending)
1934 {
1935 sig_pending = 0;
1936
1937 ECB_MEMORY_FENCE_RELEASE;
1938
1939 for (i = EV_NSIG - 1; i--; )
1940 if (expect_false (signals [i].pending))
1941 ev_feed_signal_event (EV_A_ i + 1);
1942 }
1943#endif
1944
1945#if EV_ASYNC_ENABLE
1946 if (async_pending)
1947 {
1948 async_pending = 0;
1949
1950 ECB_MEMORY_FENCE_RELEASE;
1951
1952 for (i = asynccnt; i--; )
1953 if (asyncs [i]->sent)
1954 {
1955 asyncs [i]->sent = 0;
1956 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1957 }
1958 }
1959#endif
1960}
1961
1962/*****************************************************************************/
1963
1964void
1965ev_feed_signal (int signum) EV_THROW
1966{
1967#if EV_MULTIPLICITY
1968 EV_P = signals [signum - 1].loop;
1969
1970 if (!EV_A)
1971 return;
1972#endif
1973
1974 if (!ev_active (&pipe_w))
1975 return;
1976
1977 signals [signum - 1].pending = 1;
1978 evpipe_write (EV_A_ &sig_pending);
1979}
1980
1981static void
1982ev_sighandler (int signum)
1983{
1984#ifdef _WIN32
1985 signal (signum, ev_sighandler);
1986#endif
1987
1988 ev_feed_signal (signum);
1989}
1990
1991void noinline
1992ev_feed_signal_event (EV_P_ int signum) EV_THROW
1993{
1994 WL w;
1995
1996 if (expect_false (signum <= 0 || signum > EV_NSIG))
1997 return;
1998
1999 --signum;
2000
2001#if EV_MULTIPLICITY
2002 /* it is permissible to try to feed a signal to the wrong loop */
2003 /* or, likely more useful, feeding a signal nobody is waiting for */
2004
2005 if (expect_false (signals [signum].loop != EV_A))
2006 return;
2007#endif
2008
2009 signals [signum].pending = 0;
2010
2011 for (w = signals [signum].head; w; w = w->next)
2012 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2013}
2014
2015#if EV_USE_SIGNALFD
2016static void
2017sigfdcb (EV_P_ ev_io *iow, int revents)
2018{
2019 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2020
2021 for (;;)
2022 {
2023 ssize_t res = read (sigfd, si, sizeof (si));
2024
2025 /* not ISO-C, as res might be -1, but works with SuS */
2026 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2027 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2028
2029 if (res < (ssize_t)sizeof (si))
2030 break;
2031 }
2032}
2033#endif
2034
2035#endif
2036
2037/*****************************************************************************/
2038
2039#if EV_CHILD_ENABLE
804static WL childs [EV_PID_HASHSIZE]; 2040static WL childs [EV_PID_HASHSIZE];
805 2041
806#ifndef _WIN32
807
808static ev_signal childev; 2042static ev_signal childev;
809 2043
810void inline_speed 2044#ifndef WIFCONTINUED
2045# define WIFCONTINUED(status) 0
2046#endif
2047
2048/* handle a single child status event */
2049inline_speed void
811child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2050child_reap (EV_P_ int chain, int pid, int status)
812{ 2051{
813 ev_child *w; 2052 ev_child *w;
2053 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
814 2054
815 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2055 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2056 {
816 if (w->pid == pid || !w->pid) 2057 if ((w->pid == pid || !w->pid)
2058 && (!traced || (w->flags & 1)))
817 { 2059 {
818 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2060 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
819 w->rpid = pid; 2061 w->rpid = pid;
820 w->rstatus = status; 2062 w->rstatus = status;
821 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2063 ev_feed_event (EV_A_ (W)w, EV_CHILD);
822 } 2064 }
2065 }
823} 2066}
824 2067
825#ifndef WCONTINUED 2068#ifndef WCONTINUED
826# define WCONTINUED 0 2069# define WCONTINUED 0
827#endif 2070#endif
828 2071
2072/* called on sigchld etc., calls waitpid */
829static void 2073static void
830childcb (EV_P_ ev_signal *sw, int revents) 2074childcb (EV_P_ ev_signal *sw, int revents)
831{ 2075{
832 int pid, status; 2076 int pid, status;
833 2077
… …
836 if (!WCONTINUED 2080 if (!WCONTINUED
837 || errno != EINVAL 2081 || errno != EINVAL
838 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2082 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
839 return; 2083 return;
840 2084
841 /* make sure we are called again until all childs have been reaped */ 2085 /* make sure we are called again until all children have been reaped */
842 /* we need to do it this way so that the callback gets called before we continue */ 2086 /* we need to do it this way so that the callback gets called before we continue */
843 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2087 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
844 2088
845 child_reap (EV_A_ sw, pid, pid, status); 2089 child_reap (EV_A_ pid, pid, status);
846 if (EV_PID_HASHSIZE > 1) 2090 if ((EV_PID_HASHSIZE) > 1)
847 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2091 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
848} 2092}
849 2093
850#endif 2094#endif
851 2095
852/*****************************************************************************/ 2096/*****************************************************************************/
853 2097
2098#if EV_USE_IOCP
2099# include "ev_iocp.c"
2100#endif
854#if EV_USE_PORT 2101#if EV_USE_PORT
855# include "ev_port.c" 2102# include "ev_port.c"
856#endif 2103#endif
857#if EV_USE_KQUEUE 2104#if EV_USE_KQUEUE
858# include "ev_kqueue.c" 2105# include "ev_kqueue.c"
… …
865#endif 2112#endif
866#if EV_USE_SELECT 2113#if EV_USE_SELECT
867# include "ev_select.c" 2114# include "ev_select.c"
868#endif 2115#endif
869 2116
870int 2117int ecb_cold
871ev_version_major (void) 2118ev_version_major (void) EV_THROW
872{ 2119{
873 return EV_VERSION_MAJOR; 2120 return EV_VERSION_MAJOR;
874} 2121}
875 2122
876int 2123int ecb_cold
877ev_version_minor (void) 2124ev_version_minor (void) EV_THROW
878{ 2125{
879 return EV_VERSION_MINOR; 2126 return EV_VERSION_MINOR;
880} 2127}
881 2128
882/* return true if we are running with elevated privileges and should ignore env variables */ 2129/* return true if we are running with elevated privileges and should ignore env variables */
883int inline_size 2130int inline_size ecb_cold
884enable_secure (void) 2131enable_secure (void)
885{ 2132{
886#ifdef _WIN32 2133#ifdef _WIN32
887 return 0; 2134 return 0;
888#else 2135#else
889 return getuid () != geteuid () 2136 return getuid () != geteuid ()
890 || getgid () != getegid (); 2137 || getgid () != getegid ();
891#endif 2138#endif
892} 2139}
893 2140
894unsigned int 2141unsigned int ecb_cold
895ev_supported_backends (void) 2142ev_supported_backends (void) EV_THROW
896{ 2143{
897 unsigned int flags = 0; 2144 unsigned int flags = 0;
898 2145
899 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2146 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
900 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2147 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
903 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2150 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
904 2151
905 return flags; 2152 return flags;
906} 2153}
907 2154
908unsigned int 2155unsigned int ecb_cold
909ev_recommended_backends (void) 2156ev_recommended_backends (void) EV_THROW
910{ 2157{
911 unsigned int flags = ev_supported_backends (); 2158 unsigned int flags = ev_supported_backends ();
912 2159
913#ifndef __NetBSD__ 2160#ifndef __NetBSD__
914 /* kqueue is borked on everything but netbsd apparently */ 2161 /* kqueue is borked on everything but netbsd apparently */
915 /* it usually doesn't work correctly on anything but sockets and pipes */ 2162 /* it usually doesn't work correctly on anything but sockets and pipes */
916 flags &= ~EVBACKEND_KQUEUE; 2163 flags &= ~EVBACKEND_KQUEUE;
917#endif 2164#endif
918#ifdef __APPLE__ 2165#ifdef __APPLE__
919 // flags &= ~EVBACKEND_KQUEUE; for documentation 2166 /* only select works correctly on that "unix-certified" platform */
920 flags &= ~EVBACKEND_POLL; 2167 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2168 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2169#endif
2170#ifdef __FreeBSD__
2171 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
921#endif 2172#endif
922 2173
923 return flags; 2174 return flags;
924} 2175}
925 2176
2177unsigned int ecb_cold
2178ev_embeddable_backends (void) EV_THROW
2179{
2180 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2181
2182 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2183 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2184 flags &= ~EVBACKEND_EPOLL;
2185
2186 return flags;
2187}
2188
926unsigned int 2189unsigned int
927ev_embeddable_backends (void) 2190ev_backend (EV_P) EV_THROW
928{ 2191{
929 return EVBACKEND_EPOLL 2192 return backend;
930 | EVBACKEND_KQUEUE
931 | EVBACKEND_PORT;
932} 2193}
933 2194
2195#if EV_FEATURE_API
934unsigned int 2196unsigned int
935ev_backend (EV_P) 2197ev_iteration (EV_P) EV_THROW
936{ 2198{
937 return backend; 2199 return loop_count;
938} 2200}
939 2201
940unsigned int 2202unsigned int
941ev_loop_count (EV_P) 2203ev_depth (EV_P) EV_THROW
942{ 2204{
943 return loop_count; 2205 return loop_depth;
944} 2206}
945 2207
2208void
2209ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2210{
2211 io_blocktime = interval;
2212}
2213
2214void
2215ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2216{
2217 timeout_blocktime = interval;
2218}
2219
2220void
2221ev_set_userdata (EV_P_ void *data) EV_THROW
2222{
2223 userdata = data;
2224}
2225
2226void *
2227ev_userdata (EV_P) EV_THROW
2228{
2229 return userdata;
2230}
2231
2232void
2233ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2234{
2235 invoke_cb = invoke_pending_cb;
2236}
2237
2238void
2239ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2240{
2241 release_cb = release;
2242 acquire_cb = acquire;
2243}
2244#endif
2245
2246/* initialise a loop structure, must be zero-initialised */
946static void noinline 2247static void noinline ecb_cold
947loop_init (EV_P_ unsigned int flags) 2248loop_init (EV_P_ unsigned int flags) EV_THROW
948{ 2249{
949 if (!backend) 2250 if (!backend)
950 { 2251 {
2252 origflags = flags;
2253
2254#if EV_USE_REALTIME
2255 if (!have_realtime)
2256 {
2257 struct timespec ts;
2258
2259 if (!clock_gettime (CLOCK_REALTIME, &ts))
2260 have_realtime = 1;
2261 }
2262#endif
2263
951#if EV_USE_MONOTONIC 2264#if EV_USE_MONOTONIC
2265 if (!have_monotonic)
952 { 2266 {
953 struct timespec ts; 2267 struct timespec ts;
2268
954 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2269 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
955 have_monotonic = 1; 2270 have_monotonic = 1;
956 } 2271 }
957#endif 2272#endif
958
959 ev_rt_now = ev_time ();
960 mn_now = get_clock ();
961 now_floor = mn_now;
962 rtmn_diff = ev_rt_now - mn_now;
963 2273
964 /* pid check not overridable via env */ 2274 /* pid check not overridable via env */
965#ifndef _WIN32 2275#ifndef _WIN32
966 if (flags & EVFLAG_FORKCHECK) 2276 if (flags & EVFLAG_FORKCHECK)
967 curpid = getpid (); 2277 curpid = getpid ();
… …
970 if (!(flags & EVFLAG_NOENV) 2280 if (!(flags & EVFLAG_NOENV)
971 && !enable_secure () 2281 && !enable_secure ()
972 && getenv ("LIBEV_FLAGS")) 2282 && getenv ("LIBEV_FLAGS"))
973 flags = atoi (getenv ("LIBEV_FLAGS")); 2283 flags = atoi (getenv ("LIBEV_FLAGS"));
974 2284
975 if (!(flags & 0x0000ffffUL)) 2285 ev_rt_now = ev_time ();
2286 mn_now = get_clock ();
2287 now_floor = mn_now;
2288 rtmn_diff = ev_rt_now - mn_now;
2289#if EV_FEATURE_API
2290 invoke_cb = ev_invoke_pending;
2291#endif
2292
2293 io_blocktime = 0.;
2294 timeout_blocktime = 0.;
2295 backend = 0;
2296 backend_fd = -1;
2297 sig_pending = 0;
2298#if EV_ASYNC_ENABLE
2299 async_pending = 0;
2300#endif
2301 pipe_write_skipped = 0;
2302 pipe_write_wanted = 0;
2303#if EV_USE_INOTIFY
2304 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2305#endif
2306#if EV_USE_SIGNALFD
2307 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2308#endif
2309
2310 if (!(flags & EVBACKEND_MASK))
976 flags |= ev_recommended_backends (); 2311 flags |= ev_recommended_backends ();
977 2312
978 backend = 0;
979 backend_fd = -1;
980#if EV_USE_INOTIFY 2313#if EV_USE_IOCP
981 fs_fd = -2; 2314 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
982#endif 2315#endif
983
984#if EV_USE_PORT 2316#if EV_USE_PORT
985 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2317 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
986#endif 2318#endif
987#if EV_USE_KQUEUE 2319#if EV_USE_KQUEUE
988 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2320 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
995#endif 2327#endif
996#if EV_USE_SELECT 2328#if EV_USE_SELECT
997 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2329 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
998#endif 2330#endif
999 2331
2332 ev_prepare_init (&pending_w, pendingcb);
2333
2334#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1000 ev_init (&sigev, sigcb); 2335 ev_init (&pipe_w, pipecb);
1001 ev_set_priority (&sigev, EV_MAXPRI); 2336 ev_set_priority (&pipe_w, EV_MAXPRI);
2337#endif
1002 } 2338 }
1003} 2339}
1004 2340
1005static void noinline 2341/* free up a loop structure */
2342void ecb_cold
1006loop_destroy (EV_P) 2343ev_loop_destroy (EV_P)
1007{ 2344{
1008 int i; 2345 int i;
2346
2347#if EV_MULTIPLICITY
2348 /* mimic free (0) */
2349 if (!EV_A)
2350 return;
2351#endif
2352
2353#if EV_CLEANUP_ENABLE
2354 /* queue cleanup watchers (and execute them) */
2355 if (expect_false (cleanupcnt))
2356 {
2357 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2358 EV_INVOKE_PENDING;
2359 }
2360#endif
2361
2362#if EV_CHILD_ENABLE
2363 if (ev_is_active (&childev))
2364 {
2365 ev_ref (EV_A); /* child watcher */
2366 ev_signal_stop (EV_A_ &childev);
2367 }
2368#endif
2369
2370 if (ev_is_active (&pipe_w))
2371 {
2372 /*ev_ref (EV_A);*/
2373 /*ev_io_stop (EV_A_ &pipe_w);*/
2374
2375#if EV_USE_EVENTFD
2376 if (evfd >= 0)
2377 close (evfd);
2378#endif
2379
2380 if (evpipe [0] >= 0)
2381 {
2382 EV_WIN32_CLOSE_FD (evpipe [0]);
2383 EV_WIN32_CLOSE_FD (evpipe [1]);
2384 }
2385 }
2386
2387#if EV_USE_SIGNALFD
2388 if (ev_is_active (&sigfd_w))
2389 close (sigfd);
2390#endif
1009 2391
1010#if EV_USE_INOTIFY 2392#if EV_USE_INOTIFY
1011 if (fs_fd >= 0) 2393 if (fs_fd >= 0)
1012 close (fs_fd); 2394 close (fs_fd);
1013#endif 2395#endif
1014 2396
1015 if (backend_fd >= 0) 2397 if (backend_fd >= 0)
1016 close (backend_fd); 2398 close (backend_fd);
1017 2399
2400#if EV_USE_IOCP
2401 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2402#endif
1018#if EV_USE_PORT 2403#if EV_USE_PORT
1019 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2404 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1020#endif 2405#endif
1021#if EV_USE_KQUEUE 2406#if EV_USE_KQUEUE
1022 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2407 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1037#if EV_IDLE_ENABLE 2422#if EV_IDLE_ENABLE
1038 array_free (idle, [i]); 2423 array_free (idle, [i]);
1039#endif 2424#endif
1040 } 2425 }
1041 2426
2427 ev_free (anfds); anfds = 0; anfdmax = 0;
2428
1042 /* have to use the microsoft-never-gets-it-right macro */ 2429 /* have to use the microsoft-never-gets-it-right macro */
2430 array_free (rfeed, EMPTY);
1043 array_free (fdchange, EMPTY); 2431 array_free (fdchange, EMPTY);
1044 array_free (timer, EMPTY); 2432 array_free (timer, EMPTY);
1045#if EV_PERIODIC_ENABLE 2433#if EV_PERIODIC_ENABLE
1046 array_free (periodic, EMPTY); 2434 array_free (periodic, EMPTY);
1047#endif 2435#endif
2436#if EV_FORK_ENABLE
2437 array_free (fork, EMPTY);
2438#endif
2439#if EV_CLEANUP_ENABLE
2440 array_free (cleanup, EMPTY);
2441#endif
1048 array_free (prepare, EMPTY); 2442 array_free (prepare, EMPTY);
1049 array_free (check, EMPTY); 2443 array_free (check, EMPTY);
2444#if EV_ASYNC_ENABLE
2445 array_free (async, EMPTY);
2446#endif
1050 2447
1051 backend = 0; 2448 backend = 0;
1052}
1053 2449
2450#if EV_MULTIPLICITY
2451 if (ev_is_default_loop (EV_A))
2452#endif
2453 ev_default_loop_ptr = 0;
2454#if EV_MULTIPLICITY
2455 else
2456 ev_free (EV_A);
2457#endif
2458}
2459
2460#if EV_USE_INOTIFY
1054void inline_size infy_fork (EV_P); 2461inline_size void infy_fork (EV_P);
2462#endif
1055 2463
1056void inline_size 2464inline_size void
1057loop_fork (EV_P) 2465loop_fork (EV_P)
1058{ 2466{
1059#if EV_USE_PORT 2467#if EV_USE_PORT
1060 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2468 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1061#endif 2469#endif
… …
1067#endif 2475#endif
1068#if EV_USE_INOTIFY 2476#if EV_USE_INOTIFY
1069 infy_fork (EV_A); 2477 infy_fork (EV_A);
1070#endif 2478#endif
1071 2479
1072 if (ev_is_active (&sigev)) 2480 if (ev_is_active (&pipe_w))
1073 { 2481 {
1074 /* default loop */ 2482 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1075 2483
1076 ev_ref (EV_A); 2484 ev_ref (EV_A);
1077 ev_io_stop (EV_A_ &sigev); 2485 ev_io_stop (EV_A_ &pipe_w);
1078 close (sigpipe [0]);
1079 close (sigpipe [1]);
1080 2486
1081 while (pipe (sigpipe)) 2487#if EV_USE_EVENTFD
1082 syserr ("(libev) error creating pipe"); 2488 if (evfd >= 0)
2489 close (evfd);
2490#endif
1083 2491
2492 if (evpipe [0] >= 0)
2493 {
2494 EV_WIN32_CLOSE_FD (evpipe [0]);
2495 EV_WIN32_CLOSE_FD (evpipe [1]);
2496 }
2497
2498#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1084 siginit (EV_A); 2499 evpipe_init (EV_A);
2500 /* now iterate over everything, in case we missed something */
2501 pipecb (EV_A_ &pipe_w, EV_READ);
2502#endif
1085 } 2503 }
1086 2504
1087 postfork = 0; 2505 postfork = 0;
1088} 2506}
1089 2507
1090#if EV_MULTIPLICITY 2508#if EV_MULTIPLICITY
2509
1091struct ev_loop * 2510struct ev_loop * ecb_cold
1092ev_loop_new (unsigned int flags) 2511ev_loop_new (unsigned int flags) EV_THROW
1093{ 2512{
1094 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2513 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1095 2514
1096 memset (loop, 0, sizeof (struct ev_loop)); 2515 memset (EV_A, 0, sizeof (struct ev_loop));
1097
1098 loop_init (EV_A_ flags); 2516 loop_init (EV_A_ flags);
1099 2517
1100 if (ev_backend (EV_A)) 2518 if (ev_backend (EV_A))
1101 return loop; 2519 return EV_A;
1102 2520
2521 ev_free (EV_A);
1103 return 0; 2522 return 0;
1104} 2523}
1105 2524
1106void 2525#endif /* multiplicity */
1107ev_loop_destroy (EV_P)
1108{
1109 loop_destroy (EV_A);
1110 ev_free (loop);
1111}
1112 2526
1113void 2527#if EV_VERIFY
1114ev_loop_fork (EV_P) 2528static void noinline ecb_cold
2529verify_watcher (EV_P_ W w)
1115{ 2530{
1116 postfork = 1; 2531 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1117}
1118 2532
2533 if (w->pending)
2534 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2535}
2536
2537static void noinline ecb_cold
2538verify_heap (EV_P_ ANHE *heap, int N)
2539{
2540 int i;
2541
2542 for (i = HEAP0; i < N + HEAP0; ++i)
2543 {
2544 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2545 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2546 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2547
2548 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2549 }
2550}
2551
2552static void noinline ecb_cold
2553array_verify (EV_P_ W *ws, int cnt)
2554{
2555 while (cnt--)
2556 {
2557 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2558 verify_watcher (EV_A_ ws [cnt]);
2559 }
2560}
2561#endif
2562
2563#if EV_FEATURE_API
2564void ecb_cold
2565ev_verify (EV_P) EV_THROW
2566{
2567#if EV_VERIFY
2568 int i;
2569 WL w, w2;
2570
2571 assert (activecnt >= -1);
2572
2573 assert (fdchangemax >= fdchangecnt);
2574 for (i = 0; i < fdchangecnt; ++i)
2575 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2576
2577 assert (anfdmax >= 0);
2578 for (i = 0; i < anfdmax; ++i)
2579 {
2580 int j = 0;
2581
2582 for (w = w2 = anfds [i].head; w; w = w->next)
2583 {
2584 verify_watcher (EV_A_ (W)w);
2585
2586 if (j++ & 1)
2587 {
2588 assert (("libev: io watcher list contains a loop", w != w2));
2589 w2 = w2->next;
2590 }
2591
2592 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2593 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2594 }
2595 }
2596
2597 assert (timermax >= timercnt);
2598 verify_heap (EV_A_ timers, timercnt);
2599
2600#if EV_PERIODIC_ENABLE
2601 assert (periodicmax >= periodiccnt);
2602 verify_heap (EV_A_ periodics, periodiccnt);
2603#endif
2604
2605 for (i = NUMPRI; i--; )
2606 {
2607 assert (pendingmax [i] >= pendingcnt [i]);
2608#if EV_IDLE_ENABLE
2609 assert (idleall >= 0);
2610 assert (idlemax [i] >= idlecnt [i]);
2611 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2612#endif
2613 }
2614
2615#if EV_FORK_ENABLE
2616 assert (forkmax >= forkcnt);
2617 array_verify (EV_A_ (W *)forks, forkcnt);
2618#endif
2619
2620#if EV_CLEANUP_ENABLE
2621 assert (cleanupmax >= cleanupcnt);
2622 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2623#endif
2624
2625#if EV_ASYNC_ENABLE
2626 assert (asyncmax >= asynccnt);
2627 array_verify (EV_A_ (W *)asyncs, asynccnt);
2628#endif
2629
2630#if EV_PREPARE_ENABLE
2631 assert (preparemax >= preparecnt);
2632 array_verify (EV_A_ (W *)prepares, preparecnt);
2633#endif
2634
2635#if EV_CHECK_ENABLE
2636 assert (checkmax >= checkcnt);
2637 array_verify (EV_A_ (W *)checks, checkcnt);
2638#endif
2639
2640# if 0
2641#if EV_CHILD_ENABLE
2642 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2643 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2644#endif
2645# endif
2646#endif
2647}
1119#endif 2648#endif
1120 2649
1121#if EV_MULTIPLICITY 2650#if EV_MULTIPLICITY
1122struct ev_loop * 2651struct ev_loop * ecb_cold
1123ev_default_loop_init (unsigned int flags)
1124#else 2652#else
1125int 2653int
2654#endif
1126ev_default_loop (unsigned int flags) 2655ev_default_loop (unsigned int flags) EV_THROW
1127#endif
1128{ 2656{
1129 if (sigpipe [0] == sigpipe [1])
1130 if (pipe (sigpipe))
1131 return 0;
1132
1133 if (!ev_default_loop_ptr) 2657 if (!ev_default_loop_ptr)
1134 { 2658 {
1135#if EV_MULTIPLICITY 2659#if EV_MULTIPLICITY
1136 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2660 EV_P = ev_default_loop_ptr = &default_loop_struct;
1137#else 2661#else
1138 ev_default_loop_ptr = 1; 2662 ev_default_loop_ptr = 1;
1139#endif 2663#endif
1140 2664
1141 loop_init (EV_A_ flags); 2665 loop_init (EV_A_ flags);
1142 2666
1143 if (ev_backend (EV_A)) 2667 if (ev_backend (EV_A))
1144 { 2668 {
1145 siginit (EV_A); 2669#if EV_CHILD_ENABLE
1146
1147#ifndef _WIN32
1148 ev_signal_init (&childev, childcb, SIGCHLD); 2670 ev_signal_init (&childev, childcb, SIGCHLD);
1149 ev_set_priority (&childev, EV_MAXPRI); 2671 ev_set_priority (&childev, EV_MAXPRI);
1150 ev_signal_start (EV_A_ &childev); 2672 ev_signal_start (EV_A_ &childev);
1151 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2673 ev_unref (EV_A); /* child watcher should not keep loop alive */
1152#endif 2674#endif
… …
1157 2679
1158 return ev_default_loop_ptr; 2680 return ev_default_loop_ptr;
1159} 2681}
1160 2682
1161void 2683void
1162ev_default_destroy (void) 2684ev_loop_fork (EV_P) EV_THROW
1163{ 2685{
1164#if EV_MULTIPLICITY 2686 postfork = 1; /* must be in line with ev_default_fork */
1165 struct ev_loop *loop = ev_default_loop_ptr;
1166#endif
1167
1168#ifndef _WIN32
1169 ev_ref (EV_A); /* child watcher */
1170 ev_signal_stop (EV_A_ &childev);
1171#endif
1172
1173 ev_ref (EV_A); /* signal watcher */
1174 ev_io_stop (EV_A_ &sigev);
1175
1176 close (sigpipe [0]); sigpipe [0] = 0;
1177 close (sigpipe [1]); sigpipe [1] = 0;
1178
1179 loop_destroy (EV_A);
1180}
1181
1182void
1183ev_default_fork (void)
1184{
1185#if EV_MULTIPLICITY
1186 struct ev_loop *loop = ev_default_loop_ptr;
1187#endif
1188
1189 if (backend)
1190 postfork = 1;
1191} 2687}
1192 2688
1193/*****************************************************************************/ 2689/*****************************************************************************/
1194 2690
1195void 2691void
1196ev_invoke (EV_P_ void *w, int revents) 2692ev_invoke (EV_P_ void *w, int revents)
1197{ 2693{
1198 EV_CB_INVOKE ((W)w, revents); 2694 EV_CB_INVOKE ((W)w, revents);
1199} 2695}
1200 2696
1201void inline_speed 2697unsigned int
1202call_pending (EV_P) 2698ev_pending_count (EV_P) EV_THROW
1203{ 2699{
1204 int pri; 2700 int pri;
2701 unsigned int count = 0;
1205 2702
1206 for (pri = NUMPRI; pri--; ) 2703 for (pri = NUMPRI; pri--; )
2704 count += pendingcnt [pri];
2705
2706 return count;
2707}
2708
2709void noinline
2710ev_invoke_pending (EV_P)
2711{
2712 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
1207 while (pendingcnt [pri]) 2713 while (pendingcnt [pendingpri])
1208 { 2714 {
1209 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2715 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1210 2716
1211 if (expect_true (p->w))
1212 {
1213 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1214
1215 p->w->pending = 0; 2717 p->w->pending = 0;
1216 EV_CB_INVOKE (p->w, p->events); 2718 EV_CB_INVOKE (p->w, p->events);
1217 } 2719 EV_FREQUENT_CHECK;
1218 } 2720 }
1219} 2721}
1220 2722
1221void inline_size
1222timers_reify (EV_P)
1223{
1224 while (timercnt && ((WT)timers [0])->at <= mn_now)
1225 {
1226 ev_timer *w = (ev_timer *)timers [0];
1227
1228 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1229
1230 /* first reschedule or stop timer */
1231 if (w->repeat)
1232 {
1233 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1234
1235 ((WT)w)->at += w->repeat;
1236 if (((WT)w)->at < mn_now)
1237 ((WT)w)->at = mn_now;
1238
1239 downheap (timers, timercnt, 0);
1240 }
1241 else
1242 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1243
1244 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1245 }
1246}
1247
1248#if EV_PERIODIC_ENABLE
1249void inline_size
1250periodics_reify (EV_P)
1251{
1252 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1253 {
1254 ev_periodic *w = (ev_periodic *)periodics [0];
1255
1256 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1257
1258 /* first reschedule or stop timer */
1259 if (w->reschedule_cb)
1260 {
1261 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1262 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1263 downheap (periodics, periodiccnt, 0);
1264 }
1265 else if (w->interval)
1266 {
1267 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1268 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1269 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1270 downheap (periodics, periodiccnt, 0);
1271 }
1272 else
1273 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1274
1275 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1276 }
1277}
1278
1279static void noinline
1280periodics_reschedule (EV_P)
1281{
1282 int i;
1283
1284 /* adjust periodics after time jump */
1285 for (i = 0; i < periodiccnt; ++i)
1286 {
1287 ev_periodic *w = (ev_periodic *)periodics [i];
1288
1289 if (w->reschedule_cb)
1290 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1291 else if (w->interval)
1292 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1293 }
1294
1295 /* now rebuild the heap */
1296 for (i = periodiccnt >> 1; i--; )
1297 downheap (periodics, periodiccnt, i);
1298}
1299#endif
1300
1301#if EV_IDLE_ENABLE 2723#if EV_IDLE_ENABLE
1302void inline_size 2724/* make idle watchers pending. this handles the "call-idle */
2725/* only when higher priorities are idle" logic */
2726inline_size void
1303idle_reify (EV_P) 2727idle_reify (EV_P)
1304{ 2728{
1305 if (expect_false (idleall)) 2729 if (expect_false (idleall))
1306 { 2730 {
1307 int pri; 2731 int pri;
… …
1319 } 2743 }
1320 } 2744 }
1321} 2745}
1322#endif 2746#endif
1323 2747
1324void inline_speed 2748/* make timers pending */
2749inline_size void
2750timers_reify (EV_P)
2751{
2752 EV_FREQUENT_CHECK;
2753
2754 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2755 {
2756 do
2757 {
2758 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2759
2760 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2761
2762 /* first reschedule or stop timer */
2763 if (w->repeat)
2764 {
2765 ev_at (w) += w->repeat;
2766 if (ev_at (w) < mn_now)
2767 ev_at (w) = mn_now;
2768
2769 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2770
2771 ANHE_at_cache (timers [HEAP0]);
2772 downheap (timers, timercnt, HEAP0);
2773 }
2774 else
2775 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2776
2777 EV_FREQUENT_CHECK;
2778 feed_reverse (EV_A_ (W)w);
2779 }
2780 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2781
2782 feed_reverse_done (EV_A_ EV_TIMER);
2783 }
2784}
2785
2786#if EV_PERIODIC_ENABLE
2787
2788static void noinline
2789periodic_recalc (EV_P_ ev_periodic *w)
2790{
2791 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2792 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2793
2794 /* the above almost always errs on the low side */
2795 while (at <= ev_rt_now)
2796 {
2797 ev_tstamp nat = at + w->interval;
2798
2799 /* when resolution fails us, we use ev_rt_now */
2800 if (expect_false (nat == at))
2801 {
2802 at = ev_rt_now;
2803 break;
2804 }
2805
2806 at = nat;
2807 }
2808
2809 ev_at (w) = at;
2810}
2811
2812/* make periodics pending */
2813inline_size void
2814periodics_reify (EV_P)
2815{
2816 EV_FREQUENT_CHECK;
2817
2818 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2819 {
2820 int feed_count = 0;
2821
2822 do
2823 {
2824 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2825
2826 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2827
2828 /* first reschedule or stop timer */
2829 if (w->reschedule_cb)
2830 {
2831 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2832
2833 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2834
2835 ANHE_at_cache (periodics [HEAP0]);
2836 downheap (periodics, periodiccnt, HEAP0);
2837 }
2838 else if (w->interval)
2839 {
2840 periodic_recalc (EV_A_ w);
2841 ANHE_at_cache (periodics [HEAP0]);
2842 downheap (periodics, periodiccnt, HEAP0);
2843 }
2844 else
2845 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2846
2847 EV_FREQUENT_CHECK;
2848 feed_reverse (EV_A_ (W)w);
2849 }
2850 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2851
2852 feed_reverse_done (EV_A_ EV_PERIODIC);
2853 }
2854}
2855
2856/* simply recalculate all periodics */
2857/* TODO: maybe ensure that at least one event happens when jumping forward? */
2858static void noinline ecb_cold
2859periodics_reschedule (EV_P)
2860{
2861 int i;
2862
2863 /* adjust periodics after time jump */
2864 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2865 {
2866 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2867
2868 if (w->reschedule_cb)
2869 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2870 else if (w->interval)
2871 periodic_recalc (EV_A_ w);
2872
2873 ANHE_at_cache (periodics [i]);
2874 }
2875
2876 reheap (periodics, periodiccnt);
2877}
2878#endif
2879
2880/* adjust all timers by a given offset */
2881static void noinline ecb_cold
2882timers_reschedule (EV_P_ ev_tstamp adjust)
2883{
2884 int i;
2885
2886 for (i = 0; i < timercnt; ++i)
2887 {
2888 ANHE *he = timers + i + HEAP0;
2889 ANHE_w (*he)->at += adjust;
2890 ANHE_at_cache (*he);
2891 }
2892}
2893
2894/* fetch new monotonic and realtime times from the kernel */
2895/* also detect if there was a timejump, and act accordingly */
2896inline_speed void
1325time_update (EV_P_ ev_tstamp max_block) 2897time_update (EV_P_ ev_tstamp max_block)
1326{ 2898{
1327 int i;
1328
1329#if EV_USE_MONOTONIC 2899#if EV_USE_MONOTONIC
1330 if (expect_true (have_monotonic)) 2900 if (expect_true (have_monotonic))
1331 { 2901 {
2902 int i;
1332 ev_tstamp odiff = rtmn_diff; 2903 ev_tstamp odiff = rtmn_diff;
1333 2904
1334 mn_now = get_clock (); 2905 mn_now = get_clock ();
1335 2906
1336 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2907 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1352 * doesn't hurt either as we only do this on time-jumps or 2923 * doesn't hurt either as we only do this on time-jumps or
1353 * in the unlikely event of having been preempted here. 2924 * in the unlikely event of having been preempted here.
1354 */ 2925 */
1355 for (i = 4; --i; ) 2926 for (i = 4; --i; )
1356 { 2927 {
2928 ev_tstamp diff;
1357 rtmn_diff = ev_rt_now - mn_now; 2929 rtmn_diff = ev_rt_now - mn_now;
1358 2930
1359 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2931 diff = odiff - rtmn_diff;
2932
2933 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1360 return; /* all is well */ 2934 return; /* all is well */
1361 2935
1362 ev_rt_now = ev_time (); 2936 ev_rt_now = ev_time ();
1363 mn_now = get_clock (); 2937 mn_now = get_clock ();
1364 now_floor = mn_now; 2938 now_floor = mn_now;
1365 } 2939 }
1366 2940
2941 /* no timer adjustment, as the monotonic clock doesn't jump */
2942 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1367# if EV_PERIODIC_ENABLE 2943# if EV_PERIODIC_ENABLE
1368 periodics_reschedule (EV_A); 2944 periodics_reschedule (EV_A);
1369# endif 2945# endif
1370 /* no timer adjustment, as the monotonic clock doesn't jump */
1371 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1372 } 2946 }
1373 else 2947 else
1374#endif 2948#endif
1375 { 2949 {
1376 ev_rt_now = ev_time (); 2950 ev_rt_now = ev_time ();
1377 2951
1378 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2952 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1379 { 2953 {
2954 /* adjust timers. this is easy, as the offset is the same for all of them */
2955 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1380#if EV_PERIODIC_ENABLE 2956#if EV_PERIODIC_ENABLE
1381 periodics_reschedule (EV_A); 2957 periodics_reschedule (EV_A);
1382#endif 2958#endif
1383 /* adjust timers. this is easy, as the offset is the same for all of them */
1384 for (i = 0; i < timercnt; ++i)
1385 ((WT)timers [i])->at += ev_rt_now - mn_now;
1386 } 2959 }
1387 2960
1388 mn_now = ev_rt_now; 2961 mn_now = ev_rt_now;
1389 } 2962 }
1390} 2963}
1391 2964
1392void 2965int
1393ev_ref (EV_P)
1394{
1395 ++activecnt;
1396}
1397
1398void
1399ev_unref (EV_P)
1400{
1401 --activecnt;
1402}
1403
1404static int loop_done;
1405
1406void
1407ev_loop (EV_P_ int flags) 2966ev_run (EV_P_ int flags)
1408{ 2967{
1409 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2968#if EV_FEATURE_API
1410 ? EVUNLOOP_ONE 2969 ++loop_depth;
1411 : EVUNLOOP_CANCEL; 2970#endif
1412 2971
2972 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2973
2974 loop_done = EVBREAK_CANCEL;
2975
1413 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2976 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1414 2977
1415 do 2978 do
1416 { 2979 {
2980#if EV_VERIFY >= 2
2981 ev_verify (EV_A);
2982#endif
2983
1417#ifndef _WIN32 2984#ifndef _WIN32
1418 if (expect_false (curpid)) /* penalise the forking check even more */ 2985 if (expect_false (curpid)) /* penalise the forking check even more */
1419 if (expect_false (getpid () != curpid)) 2986 if (expect_false (getpid () != curpid))
1420 { 2987 {
1421 curpid = getpid (); 2988 curpid = getpid ();
… …
1427 /* we might have forked, so queue fork handlers */ 2994 /* we might have forked, so queue fork handlers */
1428 if (expect_false (postfork)) 2995 if (expect_false (postfork))
1429 if (forkcnt) 2996 if (forkcnt)
1430 { 2997 {
1431 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2998 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1432 call_pending (EV_A); 2999 EV_INVOKE_PENDING;
1433 } 3000 }
1434#endif 3001#endif
1435 3002
3003#if EV_PREPARE_ENABLE
1436 /* queue prepare watchers (and execute them) */ 3004 /* queue prepare watchers (and execute them) */
1437 if (expect_false (preparecnt)) 3005 if (expect_false (preparecnt))
1438 { 3006 {
1439 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3007 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1440 call_pending (EV_A); 3008 EV_INVOKE_PENDING;
1441 } 3009 }
3010#endif
1442 3011
1443 if (expect_false (!activecnt)) 3012 if (expect_false (loop_done))
1444 break; 3013 break;
1445 3014
1446 /* we might have forked, so reify kernel state if necessary */ 3015 /* we might have forked, so reify kernel state if necessary */
1447 if (expect_false (postfork)) 3016 if (expect_false (postfork))
1448 loop_fork (EV_A); 3017 loop_fork (EV_A);
… …
1450 /* update fd-related kernel structures */ 3019 /* update fd-related kernel structures */
1451 fd_reify (EV_A); 3020 fd_reify (EV_A);
1452 3021
1453 /* calculate blocking time */ 3022 /* calculate blocking time */
1454 { 3023 {
1455 ev_tstamp block; 3024 ev_tstamp waittime = 0.;
3025 ev_tstamp sleeptime = 0.;
1456 3026
1457 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 3027 /* remember old timestamp for io_blocktime calculation */
1458 block = 0.; /* do not block at all */ 3028 ev_tstamp prev_mn_now = mn_now;
1459 else 3029
3030 /* update time to cancel out callback processing overhead */
3031 time_update (EV_A_ 1e100);
3032
3033 /* from now on, we want a pipe-wake-up */
3034 pipe_write_wanted = 1;
3035
3036 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3037
3038 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1460 { 3039 {
1461 /* update time to cancel out callback processing overhead */
1462 time_update (EV_A_ 1e100);
1463
1464 block = MAX_BLOCKTIME; 3040 waittime = MAX_BLOCKTIME;
1465 3041
1466 if (timercnt) 3042 if (timercnt)
1467 { 3043 {
1468 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3044 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1469 if (block > to) block = to; 3045 if (waittime > to) waittime = to;
1470 } 3046 }
1471 3047
1472#if EV_PERIODIC_ENABLE 3048#if EV_PERIODIC_ENABLE
1473 if (periodiccnt) 3049 if (periodiccnt)
1474 { 3050 {
1475 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3051 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1476 if (block > to) block = to; 3052 if (waittime > to) waittime = to;
1477 } 3053 }
1478#endif 3054#endif
1479 3055
3056 /* don't let timeouts decrease the waittime below timeout_blocktime */
3057 if (expect_false (waittime < timeout_blocktime))
3058 waittime = timeout_blocktime;
3059
3060 /* at this point, we NEED to wait, so we have to ensure */
3061 /* to pass a minimum nonzero value to the backend */
3062 if (expect_false (waittime < backend_mintime))
3063 waittime = backend_mintime;
3064
3065 /* extra check because io_blocktime is commonly 0 */
1480 if (expect_false (block < 0.)) block = 0.; 3066 if (expect_false (io_blocktime))
3067 {
3068 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3069
3070 if (sleeptime > waittime - backend_mintime)
3071 sleeptime = waittime - backend_mintime;
3072
3073 if (expect_true (sleeptime > 0.))
3074 {
3075 ev_sleep (sleeptime);
3076 waittime -= sleeptime;
3077 }
3078 }
1481 } 3079 }
1482 3080
3081#if EV_FEATURE_API
1483 ++loop_count; 3082 ++loop_count;
3083#endif
3084 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1484 backend_poll (EV_A_ block); 3085 backend_poll (EV_A_ waittime);
3086 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3087
3088 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3089
3090 if (pipe_write_skipped)
3091 {
3092 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3093 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3094 }
3095
1485 3096
1486 /* update ev_rt_now, do magic */ 3097 /* update ev_rt_now, do magic */
1487 time_update (EV_A_ block); 3098 time_update (EV_A_ waittime + sleeptime);
1488 } 3099 }
1489 3100
1490 /* queue pending timers and reschedule them */ 3101 /* queue pending timers and reschedule them */
1491 timers_reify (EV_A); /* relative timers called last */ 3102 timers_reify (EV_A); /* relative timers called last */
1492#if EV_PERIODIC_ENABLE 3103#if EV_PERIODIC_ENABLE
… …
1496#if EV_IDLE_ENABLE 3107#if EV_IDLE_ENABLE
1497 /* queue idle watchers unless other events are pending */ 3108 /* queue idle watchers unless other events are pending */
1498 idle_reify (EV_A); 3109 idle_reify (EV_A);
1499#endif 3110#endif
1500 3111
3112#if EV_CHECK_ENABLE
1501 /* queue check watchers, to be executed first */ 3113 /* queue check watchers, to be executed first */
1502 if (expect_false (checkcnt)) 3114 if (expect_false (checkcnt))
1503 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3115 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3116#endif
1504 3117
1505 call_pending (EV_A); 3118 EV_INVOKE_PENDING;
1506
1507 } 3119 }
1508 while (expect_true (activecnt && !loop_done)); 3120 while (expect_true (
3121 activecnt
3122 && !loop_done
3123 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3124 ));
1509 3125
1510 if (loop_done == EVUNLOOP_ONE) 3126 if (loop_done == EVBREAK_ONE)
1511 loop_done = EVUNLOOP_CANCEL; 3127 loop_done = EVBREAK_CANCEL;
3128
3129#if EV_FEATURE_API
3130 --loop_depth;
3131#endif
3132
3133 return activecnt;
1512} 3134}
1513 3135
1514void 3136void
1515ev_unloop (EV_P_ int how) 3137ev_break (EV_P_ int how) EV_THROW
1516{ 3138{
1517 loop_done = how; 3139 loop_done = how;
1518} 3140}
1519 3141
3142void
3143ev_ref (EV_P) EV_THROW
3144{
3145 ++activecnt;
3146}
3147
3148void
3149ev_unref (EV_P) EV_THROW
3150{
3151 --activecnt;
3152}
3153
3154void
3155ev_now_update (EV_P) EV_THROW
3156{
3157 time_update (EV_A_ 1e100);
3158}
3159
3160void
3161ev_suspend (EV_P) EV_THROW
3162{
3163 ev_now_update (EV_A);
3164}
3165
3166void
3167ev_resume (EV_P) EV_THROW
3168{
3169 ev_tstamp mn_prev = mn_now;
3170
3171 ev_now_update (EV_A);
3172 timers_reschedule (EV_A_ mn_now - mn_prev);
3173#if EV_PERIODIC_ENABLE
3174 /* TODO: really do this? */
3175 periodics_reschedule (EV_A);
3176#endif
3177}
3178
1520/*****************************************************************************/ 3179/*****************************************************************************/
3180/* singly-linked list management, used when the expected list length is short */
1521 3181
1522void inline_size 3182inline_size void
1523wlist_add (WL *head, WL elem) 3183wlist_add (WL *head, WL elem)
1524{ 3184{
1525 elem->next = *head; 3185 elem->next = *head;
1526 *head = elem; 3186 *head = elem;
1527} 3187}
1528 3188
1529void inline_size 3189inline_size void
1530wlist_del (WL *head, WL elem) 3190wlist_del (WL *head, WL elem)
1531{ 3191{
1532 while (*head) 3192 while (*head)
1533 { 3193 {
1534 if (*head == elem) 3194 if (expect_true (*head == elem))
1535 { 3195 {
1536 *head = elem->next; 3196 *head = elem->next;
1537 return; 3197 break;
1538 } 3198 }
1539 3199
1540 head = &(*head)->next; 3200 head = &(*head)->next;
1541 } 3201 }
1542} 3202}
1543 3203
1544void inline_speed 3204/* internal, faster, version of ev_clear_pending */
3205inline_speed void
1545clear_pending (EV_P_ W w) 3206clear_pending (EV_P_ W w)
1546{ 3207{
1547 if (w->pending) 3208 if (w->pending)
1548 { 3209 {
1549 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3210 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1550 w->pending = 0; 3211 w->pending = 0;
1551 } 3212 }
1552} 3213}
1553 3214
1554int 3215int
1555ev_clear_pending (EV_P_ void *w) 3216ev_clear_pending (EV_P_ void *w) EV_THROW
1556{ 3217{
1557 W w_ = (W)w; 3218 W w_ = (W)w;
1558 int pending = w_->pending; 3219 int pending = w_->pending;
1559 3220
1560 if (expect_true (pending)) 3221 if (expect_true (pending))
1561 { 3222 {
1562 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3223 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3224 p->w = (W)&pending_w;
1563 w_->pending = 0; 3225 w_->pending = 0;
1564 p->w = 0;
1565 return p->events; 3226 return p->events;
1566 } 3227 }
1567 else 3228 else
1568 return 0; 3229 return 0;
1569} 3230}
1570 3231
1571void inline_size 3232inline_size void
1572pri_adjust (EV_P_ W w) 3233pri_adjust (EV_P_ W w)
1573{ 3234{
1574 int pri = w->priority; 3235 int pri = ev_priority (w);
1575 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3236 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1576 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3237 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1577 w->priority = pri; 3238 ev_set_priority (w, pri);
1578} 3239}
1579 3240
1580void inline_speed 3241inline_speed void
1581ev_start (EV_P_ W w, int active) 3242ev_start (EV_P_ W w, int active)
1582{ 3243{
1583 pri_adjust (EV_A_ w); 3244 pri_adjust (EV_A_ w);
1584 w->active = active; 3245 w->active = active;
1585 ev_ref (EV_A); 3246 ev_ref (EV_A);
1586} 3247}
1587 3248
1588void inline_size 3249inline_size void
1589ev_stop (EV_P_ W w) 3250ev_stop (EV_P_ W w)
1590{ 3251{
1591 ev_unref (EV_A); 3252 ev_unref (EV_A);
1592 w->active = 0; 3253 w->active = 0;
1593} 3254}
1594 3255
1595/*****************************************************************************/ 3256/*****************************************************************************/
1596 3257
1597void noinline 3258void noinline
1598ev_io_start (EV_P_ ev_io *w) 3259ev_io_start (EV_P_ ev_io *w) EV_THROW
1599{ 3260{
1600 int fd = w->fd; 3261 int fd = w->fd;
1601 3262
1602 if (expect_false (ev_is_active (w))) 3263 if (expect_false (ev_is_active (w)))
1603 return; 3264 return;
1604 3265
1605 assert (("ev_io_start called with negative fd", fd >= 0)); 3266 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3267 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3268
3269 EV_FREQUENT_CHECK;
1606 3270
1607 ev_start (EV_A_ (W)w, 1); 3271 ev_start (EV_A_ (W)w, 1);
1608 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3272 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1609 wlist_add (&anfds[fd].head, (WL)w); 3273 wlist_add (&anfds[fd].head, (WL)w);
1610 3274
3275 /* common bug, apparently */
3276 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3277
1611 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3278 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1612 w->events &= ~EV_IOFDSET; 3279 w->events &= ~EV__IOFDSET;
3280
3281 EV_FREQUENT_CHECK;
1613} 3282}
1614 3283
1615void noinline 3284void noinline
1616ev_io_stop (EV_P_ ev_io *w) 3285ev_io_stop (EV_P_ ev_io *w) EV_THROW
1617{ 3286{
1618 clear_pending (EV_A_ (W)w); 3287 clear_pending (EV_A_ (W)w);
1619 if (expect_false (!ev_is_active (w))) 3288 if (expect_false (!ev_is_active (w)))
1620 return; 3289 return;
1621 3290
1622 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3291 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3292
3293 EV_FREQUENT_CHECK;
1623 3294
1624 wlist_del (&anfds[w->fd].head, (WL)w); 3295 wlist_del (&anfds[w->fd].head, (WL)w);
1625 ev_stop (EV_A_ (W)w); 3296 ev_stop (EV_A_ (W)w);
1626 3297
1627 fd_change (EV_A_ w->fd, 1); 3298 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3299
3300 EV_FREQUENT_CHECK;
1628} 3301}
1629 3302
1630void noinline 3303void noinline
1631ev_timer_start (EV_P_ ev_timer *w) 3304ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1632{ 3305{
1633 if (expect_false (ev_is_active (w))) 3306 if (expect_false (ev_is_active (w)))
1634 return; 3307 return;
1635 3308
1636 ((WT)w)->at += mn_now; 3309 ev_at (w) += mn_now;
1637 3310
1638 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3311 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1639 3312
3313 EV_FREQUENT_CHECK;
3314
3315 ++timercnt;
1640 ev_start (EV_A_ (W)w, ++timercnt); 3316 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1641 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3317 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1642 timers [timercnt - 1] = (WT)w; 3318 ANHE_w (timers [ev_active (w)]) = (WT)w;
1643 upheap (timers, timercnt - 1); 3319 ANHE_at_cache (timers [ev_active (w)]);
3320 upheap (timers, ev_active (w));
1644 3321
3322 EV_FREQUENT_CHECK;
3323
1645 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3324 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1646} 3325}
1647 3326
1648void noinline 3327void noinline
1649ev_timer_stop (EV_P_ ev_timer *w) 3328ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1650{ 3329{
1651 clear_pending (EV_A_ (W)w); 3330 clear_pending (EV_A_ (W)w);
1652 if (expect_false (!ev_is_active (w))) 3331 if (expect_false (!ev_is_active (w)))
1653 return; 3332 return;
1654 3333
1655 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3334 EV_FREQUENT_CHECK;
1656 3335
1657 { 3336 {
1658 int active = ((W)w)->active; 3337 int active = ev_active (w);
1659 3338
3339 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3340
3341 --timercnt;
3342
1660 if (expect_true (--active < --timercnt)) 3343 if (expect_true (active < timercnt + HEAP0))
1661 { 3344 {
1662 timers [active] = timers [timercnt]; 3345 timers [active] = timers [timercnt + HEAP0];
1663 adjustheap (timers, timercnt, active); 3346 adjustheap (timers, timercnt, active);
1664 } 3347 }
1665 } 3348 }
1666 3349
1667 ((WT)w)->at -= mn_now; 3350 ev_at (w) -= mn_now;
1668 3351
1669 ev_stop (EV_A_ (W)w); 3352 ev_stop (EV_A_ (W)w);
3353
3354 EV_FREQUENT_CHECK;
1670} 3355}
1671 3356
1672void noinline 3357void noinline
1673ev_timer_again (EV_P_ ev_timer *w) 3358ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1674{ 3359{
3360 EV_FREQUENT_CHECK;
3361
3362 clear_pending (EV_A_ (W)w);
3363
1675 if (ev_is_active (w)) 3364 if (ev_is_active (w))
1676 { 3365 {
1677 if (w->repeat) 3366 if (w->repeat)
1678 { 3367 {
1679 ((WT)w)->at = mn_now + w->repeat; 3368 ev_at (w) = mn_now + w->repeat;
3369 ANHE_at_cache (timers [ev_active (w)]);
1680 adjustheap (timers, timercnt, ((W)w)->active - 1); 3370 adjustheap (timers, timercnt, ev_active (w));
1681 } 3371 }
1682 else 3372 else
1683 ev_timer_stop (EV_A_ w); 3373 ev_timer_stop (EV_A_ w);
1684 } 3374 }
1685 else if (w->repeat) 3375 else if (w->repeat)
1686 { 3376 {
1687 w->at = w->repeat; 3377 ev_at (w) = w->repeat;
1688 ev_timer_start (EV_A_ w); 3378 ev_timer_start (EV_A_ w);
1689 } 3379 }
3380
3381 EV_FREQUENT_CHECK;
3382}
3383
3384ev_tstamp
3385ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3386{
3387 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1690} 3388}
1691 3389
1692#if EV_PERIODIC_ENABLE 3390#if EV_PERIODIC_ENABLE
1693void noinline 3391void noinline
1694ev_periodic_start (EV_P_ ev_periodic *w) 3392ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1695{ 3393{
1696 if (expect_false (ev_is_active (w))) 3394 if (expect_false (ev_is_active (w)))
1697 return; 3395 return;
1698 3396
1699 if (w->reschedule_cb) 3397 if (w->reschedule_cb)
1700 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3398 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1701 else if (w->interval) 3399 else if (w->interval)
1702 { 3400 {
1703 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3401 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1704 /* this formula differs from the one in periodic_reify because we do not always round up */ 3402 periodic_recalc (EV_A_ w);
1705 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1706 } 3403 }
1707 else 3404 else
1708 ((WT)w)->at = w->offset; 3405 ev_at (w) = w->offset;
1709 3406
3407 EV_FREQUENT_CHECK;
3408
3409 ++periodiccnt;
1710 ev_start (EV_A_ (W)w, ++periodiccnt); 3410 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1711 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 3411 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1712 periodics [periodiccnt - 1] = (WT)w; 3412 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1713 upheap (periodics, periodiccnt - 1); 3413 ANHE_at_cache (periodics [ev_active (w)]);
3414 upheap (periodics, ev_active (w));
1714 3415
3416 EV_FREQUENT_CHECK;
3417
1715 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3418 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1716} 3419}
1717 3420
1718void noinline 3421void noinline
1719ev_periodic_stop (EV_P_ ev_periodic *w) 3422ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1720{ 3423{
1721 clear_pending (EV_A_ (W)w); 3424 clear_pending (EV_A_ (W)w);
1722 if (expect_false (!ev_is_active (w))) 3425 if (expect_false (!ev_is_active (w)))
1723 return; 3426 return;
1724 3427
1725 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3428 EV_FREQUENT_CHECK;
1726 3429
1727 { 3430 {
1728 int active = ((W)w)->active; 3431 int active = ev_active (w);
1729 3432
3433 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3434
3435 --periodiccnt;
3436
1730 if (expect_true (--active < --periodiccnt)) 3437 if (expect_true (active < periodiccnt + HEAP0))
1731 { 3438 {
1732 periodics [active] = periodics [periodiccnt]; 3439 periodics [active] = periodics [periodiccnt + HEAP0];
1733 adjustheap (periodics, periodiccnt, active); 3440 adjustheap (periodics, periodiccnt, active);
1734 } 3441 }
1735 } 3442 }
1736 3443
1737 ev_stop (EV_A_ (W)w); 3444 ev_stop (EV_A_ (W)w);
3445
3446 EV_FREQUENT_CHECK;
1738} 3447}
1739 3448
1740void noinline 3449void noinline
1741ev_periodic_again (EV_P_ ev_periodic *w) 3450ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1742{ 3451{
1743 /* TODO: use adjustheap and recalculation */ 3452 /* TODO: use adjustheap and recalculation */
1744 ev_periodic_stop (EV_A_ w); 3453 ev_periodic_stop (EV_A_ w);
1745 ev_periodic_start (EV_A_ w); 3454 ev_periodic_start (EV_A_ w);
1746} 3455}
… …
1748 3457
1749#ifndef SA_RESTART 3458#ifndef SA_RESTART
1750# define SA_RESTART 0 3459# define SA_RESTART 0
1751#endif 3460#endif
1752 3461
3462#if EV_SIGNAL_ENABLE
3463
1753void noinline 3464void noinline
1754ev_signal_start (EV_P_ ev_signal *w) 3465ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1755{ 3466{
1756#if EV_MULTIPLICITY
1757 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1758#endif
1759 if (expect_false (ev_is_active (w))) 3467 if (expect_false (ev_is_active (w)))
1760 return; 3468 return;
1761 3469
1762 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3470 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1763 3471
3472#if EV_MULTIPLICITY
3473 assert (("libev: a signal must not be attached to two different loops",
3474 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3475
3476 signals [w->signum - 1].loop = EV_A;
3477#endif
3478
3479 EV_FREQUENT_CHECK;
3480
3481#if EV_USE_SIGNALFD
3482 if (sigfd == -2)
1764 { 3483 {
1765#ifndef _WIN32 3484 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1766 sigset_t full, prev; 3485 if (sigfd < 0 && errno == EINVAL)
1767 sigfillset (&full); 3486 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1768 sigprocmask (SIG_SETMASK, &full, &prev);
1769#endif
1770 3487
1771 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3488 if (sigfd >= 0)
3489 {
3490 fd_intern (sigfd); /* doing it twice will not hurt */
1772 3491
1773#ifndef _WIN32 3492 sigemptyset (&sigfd_set);
1774 sigprocmask (SIG_SETMASK, &prev, 0); 3493
1775#endif 3494 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3495 ev_set_priority (&sigfd_w, EV_MAXPRI);
3496 ev_io_start (EV_A_ &sigfd_w);
3497 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3498 }
1776 } 3499 }
3500
3501 if (sigfd >= 0)
3502 {
3503 /* TODO: check .head */
3504 sigaddset (&sigfd_set, w->signum);
3505 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3506
3507 signalfd (sigfd, &sigfd_set, 0);
3508 }
3509#endif
1777 3510
1778 ev_start (EV_A_ (W)w, 1); 3511 ev_start (EV_A_ (W)w, 1);
1779 wlist_add (&signals [w->signum - 1].head, (WL)w); 3512 wlist_add (&signals [w->signum - 1].head, (WL)w);
1780 3513
1781 if (!((WL)w)->next) 3514 if (!((WL)w)->next)
3515# if EV_USE_SIGNALFD
3516 if (sigfd < 0) /*TODO*/
3517# endif
1782 { 3518 {
1783#if _WIN32 3519# ifdef _WIN32
3520 evpipe_init (EV_A);
3521
1784 signal (w->signum, sighandler); 3522 signal (w->signum, ev_sighandler);
1785#else 3523# else
1786 struct sigaction sa; 3524 struct sigaction sa;
3525
3526 evpipe_init (EV_A);
3527
1787 sa.sa_handler = sighandler; 3528 sa.sa_handler = ev_sighandler;
1788 sigfillset (&sa.sa_mask); 3529 sigfillset (&sa.sa_mask);
1789 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3530 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1790 sigaction (w->signum, &sa, 0); 3531 sigaction (w->signum, &sa, 0);
3532
3533 if (origflags & EVFLAG_NOSIGMASK)
3534 {
3535 sigemptyset (&sa.sa_mask);
3536 sigaddset (&sa.sa_mask, w->signum);
3537 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3538 }
1791#endif 3539#endif
1792 } 3540 }
3541
3542 EV_FREQUENT_CHECK;
1793} 3543}
1794 3544
1795void noinline 3545void noinline
1796ev_signal_stop (EV_P_ ev_signal *w) 3546ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1797{ 3547{
1798 clear_pending (EV_A_ (W)w); 3548 clear_pending (EV_A_ (W)w);
1799 if (expect_false (!ev_is_active (w))) 3549 if (expect_false (!ev_is_active (w)))
1800 return; 3550 return;
1801 3551
3552 EV_FREQUENT_CHECK;
3553
1802 wlist_del (&signals [w->signum - 1].head, (WL)w); 3554 wlist_del (&signals [w->signum - 1].head, (WL)w);
1803 ev_stop (EV_A_ (W)w); 3555 ev_stop (EV_A_ (W)w);
1804 3556
1805 if (!signals [w->signum - 1].head) 3557 if (!signals [w->signum - 1].head)
3558 {
3559#if EV_MULTIPLICITY
3560 signals [w->signum - 1].loop = 0; /* unattach from signal */
3561#endif
3562#if EV_USE_SIGNALFD
3563 if (sigfd >= 0)
3564 {
3565 sigset_t ss;
3566
3567 sigemptyset (&ss);
3568 sigaddset (&ss, w->signum);
3569 sigdelset (&sigfd_set, w->signum);
3570
3571 signalfd (sigfd, &sigfd_set, 0);
3572 sigprocmask (SIG_UNBLOCK, &ss, 0);
3573 }
3574 else
3575#endif
1806 signal (w->signum, SIG_DFL); 3576 signal (w->signum, SIG_DFL);
3577 }
3578
3579 EV_FREQUENT_CHECK;
1807} 3580}
3581
3582#endif
3583
3584#if EV_CHILD_ENABLE
1808 3585
1809void 3586void
1810ev_child_start (EV_P_ ev_child *w) 3587ev_child_start (EV_P_ ev_child *w) EV_THROW
1811{ 3588{
1812#if EV_MULTIPLICITY 3589#if EV_MULTIPLICITY
1813 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3590 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1814#endif 3591#endif
1815 if (expect_false (ev_is_active (w))) 3592 if (expect_false (ev_is_active (w)))
1816 return; 3593 return;
1817 3594
3595 EV_FREQUENT_CHECK;
3596
1818 ev_start (EV_A_ (W)w, 1); 3597 ev_start (EV_A_ (W)w, 1);
1819 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3598 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3599
3600 EV_FREQUENT_CHECK;
1820} 3601}
1821 3602
1822void 3603void
1823ev_child_stop (EV_P_ ev_child *w) 3604ev_child_stop (EV_P_ ev_child *w) EV_THROW
1824{ 3605{
1825 clear_pending (EV_A_ (W)w); 3606 clear_pending (EV_A_ (W)w);
1826 if (expect_false (!ev_is_active (w))) 3607 if (expect_false (!ev_is_active (w)))
1827 return; 3608 return;
1828 3609
3610 EV_FREQUENT_CHECK;
3611
1829 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3612 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1830 ev_stop (EV_A_ (W)w); 3613 ev_stop (EV_A_ (W)w);
3614
3615 EV_FREQUENT_CHECK;
1831} 3616}
3617
3618#endif
1832 3619
1833#if EV_STAT_ENABLE 3620#if EV_STAT_ENABLE
1834 3621
1835# ifdef _WIN32 3622# ifdef _WIN32
1836# undef lstat 3623# undef lstat
1837# define lstat(a,b) _stati64 (a,b) 3624# define lstat(a,b) _stati64 (a,b)
1838# endif 3625# endif
1839 3626
1840#define DEF_STAT_INTERVAL 5.0074891 3627#define DEF_STAT_INTERVAL 5.0074891
3628#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1841#define MIN_STAT_INTERVAL 0.1074891 3629#define MIN_STAT_INTERVAL 0.1074891
1842 3630
1843static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3631static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1844 3632
1845#if EV_USE_INOTIFY 3633#if EV_USE_INOTIFY
1846# define EV_INOTIFY_BUFSIZE 8192 3634
3635/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3636# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1847 3637
1848static void noinline 3638static void noinline
1849infy_add (EV_P_ ev_stat *w) 3639infy_add (EV_P_ ev_stat *w)
1850{ 3640{
1851 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); 3641 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);
1852 3642
1853 if (w->wd < 0) 3643 if (w->wd >= 0)
3644 {
3645 struct statfs sfs;
3646
3647 /* now local changes will be tracked by inotify, but remote changes won't */
3648 /* unless the filesystem is known to be local, we therefore still poll */
3649 /* also do poll on <2.6.25, but with normal frequency */
3650
3651 if (!fs_2625)
3652 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3653 else if (!statfs (w->path, &sfs)
3654 && (sfs.f_type == 0x1373 /* devfs */
3655 || sfs.f_type == 0xEF53 /* ext2/3 */
3656 || sfs.f_type == 0x3153464a /* jfs */
3657 || sfs.f_type == 0x52654973 /* reiser3 */
3658 || sfs.f_type == 0x01021994 /* tempfs */
3659 || sfs.f_type == 0x58465342 /* xfs */))
3660 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3661 else
3662 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1854 { 3663 }
1855 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3664 else
3665 {
3666 /* can't use inotify, continue to stat */
3667 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1856 3668
1857 /* monitor some parent directory for speedup hints */ 3669 /* if path is not there, monitor some parent directory for speedup hints */
3670 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3671 /* but an efficiency issue only */
1858 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3672 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1859 { 3673 {
1860 char path [4096]; 3674 char path [4096];
1861 strcpy (path, w->path); 3675 strcpy (path, w->path);
1862 3676
… …
1865 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3679 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1866 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3680 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1867 3681
1868 char *pend = strrchr (path, '/'); 3682 char *pend = strrchr (path, '/');
1869 3683
1870 if (!pend) 3684 if (!pend || pend == path)
1871 break; /* whoops, no '/', complain to your admin */ 3685 break;
1872 3686
1873 *pend = 0; 3687 *pend = 0;
1874 w->wd = inotify_add_watch (fs_fd, path, mask); 3688 w->wd = inotify_add_watch (fs_fd, path, mask);
1875 } 3689 }
1876 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3690 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1877 } 3691 }
1878 } 3692 }
1879 else
1880 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1881 3693
1882 if (w->wd >= 0) 3694 if (w->wd >= 0)
1883 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3695 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3696
3697 /* now re-arm timer, if required */
3698 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3699 ev_timer_again (EV_A_ &w->timer);
3700 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1884} 3701}
1885 3702
1886static void noinline 3703static void noinline
1887infy_del (EV_P_ ev_stat *w) 3704infy_del (EV_P_ ev_stat *w)
1888{ 3705{
… …
1891 3708
1892 if (wd < 0) 3709 if (wd < 0)
1893 return; 3710 return;
1894 3711
1895 w->wd = -2; 3712 w->wd = -2;
1896 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3713 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1897 wlist_del (&fs_hash [slot].head, (WL)w); 3714 wlist_del (&fs_hash [slot].head, (WL)w);
1898 3715
1899 /* remove this watcher, if others are watching it, they will rearm */ 3716 /* remove this watcher, if others are watching it, they will rearm */
1900 inotify_rm_watch (fs_fd, wd); 3717 inotify_rm_watch (fs_fd, wd);
1901} 3718}
1902 3719
1903static void noinline 3720static void noinline
1904infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3721infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1905{ 3722{
1906 if (slot < 0) 3723 if (slot < 0)
1907 /* overflow, need to check for all hahs slots */ 3724 /* overflow, need to check for all hash slots */
1908 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3725 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1909 infy_wd (EV_A_ slot, wd, ev); 3726 infy_wd (EV_A_ slot, wd, ev);
1910 else 3727 else
1911 { 3728 {
1912 WL w_; 3729 WL w_;
1913 3730
1914 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3731 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1915 { 3732 {
1916 ev_stat *w = (ev_stat *)w_; 3733 ev_stat *w = (ev_stat *)w_;
1917 w_ = w_->next; /* lets us remove this watcher and all before it */ 3734 w_ = w_->next; /* lets us remove this watcher and all before it */
1918 3735
1919 if (w->wd == wd || wd == -1) 3736 if (w->wd == wd || wd == -1)
1920 { 3737 {
1921 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3738 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1922 { 3739 {
3740 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1923 w->wd = -1; 3741 w->wd = -1;
1924 infy_add (EV_A_ w); /* re-add, no matter what */ 3742 infy_add (EV_A_ w); /* re-add, no matter what */
1925 } 3743 }
1926 3744
1927 stat_timer_cb (EV_A_ &w->timer, 0); 3745 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1932 3750
1933static void 3751static void
1934infy_cb (EV_P_ ev_io *w, int revents) 3752infy_cb (EV_P_ ev_io *w, int revents)
1935{ 3753{
1936 char buf [EV_INOTIFY_BUFSIZE]; 3754 char buf [EV_INOTIFY_BUFSIZE];
1937 struct inotify_event *ev = (struct inotify_event *)buf;
1938 int ofs; 3755 int ofs;
1939 int len = read (fs_fd, buf, sizeof (buf)); 3756 int len = read (fs_fd, buf, sizeof (buf));
1940 3757
1941 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3758 for (ofs = 0; ofs < len; )
3759 {
3760 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1942 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3761 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3762 ofs += sizeof (struct inotify_event) + ev->len;
3763 }
1943} 3764}
1944 3765
1945void inline_size 3766inline_size void ecb_cold
3767ev_check_2625 (EV_P)
3768{
3769 /* kernels < 2.6.25 are borked
3770 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3771 */
3772 if (ev_linux_version () < 0x020619)
3773 return;
3774
3775 fs_2625 = 1;
3776}
3777
3778inline_size int
3779infy_newfd (void)
3780{
3781#if defined IN_CLOEXEC && defined IN_NONBLOCK
3782 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3783 if (fd >= 0)
3784 return fd;
3785#endif
3786 return inotify_init ();
3787}
3788
3789inline_size void
1946infy_init (EV_P) 3790infy_init (EV_P)
1947{ 3791{
1948 if (fs_fd != -2) 3792 if (fs_fd != -2)
1949 return; 3793 return;
1950 3794
3795 fs_fd = -1;
3796
3797 ev_check_2625 (EV_A);
3798
1951 fs_fd = inotify_init (); 3799 fs_fd = infy_newfd ();
1952 3800
1953 if (fs_fd >= 0) 3801 if (fs_fd >= 0)
1954 { 3802 {
3803 fd_intern (fs_fd);
1955 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3804 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1956 ev_set_priority (&fs_w, EV_MAXPRI); 3805 ev_set_priority (&fs_w, EV_MAXPRI);
1957 ev_io_start (EV_A_ &fs_w); 3806 ev_io_start (EV_A_ &fs_w);
3807 ev_unref (EV_A);
1958 } 3808 }
1959} 3809}
1960 3810
1961void inline_size 3811inline_size void
1962infy_fork (EV_P) 3812infy_fork (EV_P)
1963{ 3813{
1964 int slot; 3814 int slot;
1965 3815
1966 if (fs_fd < 0) 3816 if (fs_fd < 0)
1967 return; 3817 return;
1968 3818
3819 ev_ref (EV_A);
3820 ev_io_stop (EV_A_ &fs_w);
1969 close (fs_fd); 3821 close (fs_fd);
1970 fs_fd = inotify_init (); 3822 fs_fd = infy_newfd ();
1971 3823
3824 if (fs_fd >= 0)
3825 {
3826 fd_intern (fs_fd);
3827 ev_io_set (&fs_w, fs_fd, EV_READ);
3828 ev_io_start (EV_A_ &fs_w);
3829 ev_unref (EV_A);
3830 }
3831
1972 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3832 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1973 { 3833 {
1974 WL w_ = fs_hash [slot].head; 3834 WL w_ = fs_hash [slot].head;
1975 fs_hash [slot].head = 0; 3835 fs_hash [slot].head = 0;
1976 3836
1977 while (w_) 3837 while (w_)
… …
1982 w->wd = -1; 3842 w->wd = -1;
1983 3843
1984 if (fs_fd >= 0) 3844 if (fs_fd >= 0)
1985 infy_add (EV_A_ w); /* re-add, no matter what */ 3845 infy_add (EV_A_ w); /* re-add, no matter what */
1986 else 3846 else
3847 {
3848 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3849 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1987 ev_timer_start (EV_A_ &w->timer); 3850 ev_timer_again (EV_A_ &w->timer);
3851 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3852 }
1988 } 3853 }
1989
1990 } 3854 }
1991} 3855}
1992 3856
3857#endif
3858
3859#ifdef _WIN32
3860# define EV_LSTAT(p,b) _stati64 (p, b)
3861#else
3862# define EV_LSTAT(p,b) lstat (p, b)
1993#endif 3863#endif
1994 3864
1995void 3865void
1996ev_stat_stat (EV_P_ ev_stat *w) 3866ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1997{ 3867{
1998 if (lstat (w->path, &w->attr) < 0) 3868 if (lstat (w->path, &w->attr) < 0)
1999 w->attr.st_nlink = 0; 3869 w->attr.st_nlink = 0;
2000 else if (!w->attr.st_nlink) 3870 else if (!w->attr.st_nlink)
2001 w->attr.st_nlink = 1; 3871 w->attr.st_nlink = 1;
… …
2004static void noinline 3874static void noinline
2005stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3875stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2006{ 3876{
2007 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3877 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2008 3878
2009 /* we copy this here each the time so that */ 3879 ev_statdata prev = w->attr;
2010 /* prev has the old value when the callback gets invoked */
2011 w->prev = w->attr;
2012 ev_stat_stat (EV_A_ w); 3880 ev_stat_stat (EV_A_ w);
2013 3881
2014 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3882 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2015 if ( 3883 if (
2016 w->prev.st_dev != w->attr.st_dev 3884 prev.st_dev != w->attr.st_dev
2017 || w->prev.st_ino != w->attr.st_ino 3885 || prev.st_ino != w->attr.st_ino
2018 || w->prev.st_mode != w->attr.st_mode 3886 || prev.st_mode != w->attr.st_mode
2019 || w->prev.st_nlink != w->attr.st_nlink 3887 || prev.st_nlink != w->attr.st_nlink
2020 || w->prev.st_uid != w->attr.st_uid 3888 || prev.st_uid != w->attr.st_uid
2021 || w->prev.st_gid != w->attr.st_gid 3889 || prev.st_gid != w->attr.st_gid
2022 || w->prev.st_rdev != w->attr.st_rdev 3890 || prev.st_rdev != w->attr.st_rdev
2023 || w->prev.st_size != w->attr.st_size 3891 || prev.st_size != w->attr.st_size
2024 || w->prev.st_atime != w->attr.st_atime 3892 || prev.st_atime != w->attr.st_atime
2025 || w->prev.st_mtime != w->attr.st_mtime 3893 || prev.st_mtime != w->attr.st_mtime
2026 || w->prev.st_ctime != w->attr.st_ctime 3894 || prev.st_ctime != w->attr.st_ctime
2027 ) { 3895 ) {
3896 /* we only update w->prev on actual differences */
3897 /* in case we test more often than invoke the callback, */
3898 /* to ensure that prev is always different to attr */
3899 w->prev = prev;
3900
2028 #if EV_USE_INOTIFY 3901 #if EV_USE_INOTIFY
3902 if (fs_fd >= 0)
3903 {
2029 infy_del (EV_A_ w); 3904 infy_del (EV_A_ w);
2030 infy_add (EV_A_ w); 3905 infy_add (EV_A_ w);
2031 ev_stat_stat (EV_A_ w); /* avoid race... */ 3906 ev_stat_stat (EV_A_ w); /* avoid race... */
3907 }
2032 #endif 3908 #endif
2033 3909
2034 ev_feed_event (EV_A_ w, EV_STAT); 3910 ev_feed_event (EV_A_ w, EV_STAT);
2035 } 3911 }
2036} 3912}
2037 3913
2038void 3914void
2039ev_stat_start (EV_P_ ev_stat *w) 3915ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2040{ 3916{
2041 if (expect_false (ev_is_active (w))) 3917 if (expect_false (ev_is_active (w)))
2042 return; 3918 return;
2043 3919
2044 /* since we use memcmp, we need to clear any padding data etc. */
2045 memset (&w->prev, 0, sizeof (ev_statdata));
2046 memset (&w->attr, 0, sizeof (ev_statdata));
2047
2048 ev_stat_stat (EV_A_ w); 3920 ev_stat_stat (EV_A_ w);
2049 3921
3922 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2050 if (w->interval < MIN_STAT_INTERVAL) 3923 w->interval = MIN_STAT_INTERVAL;
2051 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2052 3924
2053 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3925 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2054 ev_set_priority (&w->timer, ev_priority (w)); 3926 ev_set_priority (&w->timer, ev_priority (w));
2055 3927
2056#if EV_USE_INOTIFY 3928#if EV_USE_INOTIFY
2057 infy_init (EV_A); 3929 infy_init (EV_A);
2058 3930
2059 if (fs_fd >= 0) 3931 if (fs_fd >= 0)
2060 infy_add (EV_A_ w); 3932 infy_add (EV_A_ w);
2061 else 3933 else
2062#endif 3934#endif
3935 {
2063 ev_timer_start (EV_A_ &w->timer); 3936 ev_timer_again (EV_A_ &w->timer);
3937 ev_unref (EV_A);
3938 }
2064 3939
2065 ev_start (EV_A_ (W)w, 1); 3940 ev_start (EV_A_ (W)w, 1);
3941
3942 EV_FREQUENT_CHECK;
2066} 3943}
2067 3944
2068void 3945void
2069ev_stat_stop (EV_P_ ev_stat *w) 3946ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2070{ 3947{
2071 clear_pending (EV_A_ (W)w); 3948 clear_pending (EV_A_ (W)w);
2072 if (expect_false (!ev_is_active (w))) 3949 if (expect_false (!ev_is_active (w)))
2073 return; 3950 return;
2074 3951
3952 EV_FREQUENT_CHECK;
3953
2075#if EV_USE_INOTIFY 3954#if EV_USE_INOTIFY
2076 infy_del (EV_A_ w); 3955 infy_del (EV_A_ w);
2077#endif 3956#endif
3957
3958 if (ev_is_active (&w->timer))
3959 {
3960 ev_ref (EV_A);
2078 ev_timer_stop (EV_A_ &w->timer); 3961 ev_timer_stop (EV_A_ &w->timer);
3962 }
2079 3963
2080 ev_stop (EV_A_ (W)w); 3964 ev_stop (EV_A_ (W)w);
3965
3966 EV_FREQUENT_CHECK;
2081} 3967}
2082#endif 3968#endif
2083 3969
2084#if EV_IDLE_ENABLE 3970#if EV_IDLE_ENABLE
2085void 3971void
2086ev_idle_start (EV_P_ ev_idle *w) 3972ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2087{ 3973{
2088 if (expect_false (ev_is_active (w))) 3974 if (expect_false (ev_is_active (w)))
2089 return; 3975 return;
2090 3976
2091 pri_adjust (EV_A_ (W)w); 3977 pri_adjust (EV_A_ (W)w);
3978
3979 EV_FREQUENT_CHECK;
2092 3980
2093 { 3981 {
2094 int active = ++idlecnt [ABSPRI (w)]; 3982 int active = ++idlecnt [ABSPRI (w)];
2095 3983
2096 ++idleall; 3984 ++idleall;
2097 ev_start (EV_A_ (W)w, active); 3985 ev_start (EV_A_ (W)w, active);
2098 3986
2099 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3987 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2100 idles [ABSPRI (w)][active - 1] = w; 3988 idles [ABSPRI (w)][active - 1] = w;
2101 } 3989 }
3990
3991 EV_FREQUENT_CHECK;
2102} 3992}
2103 3993
2104void 3994void
2105ev_idle_stop (EV_P_ ev_idle *w) 3995ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2106{ 3996{
2107 clear_pending (EV_A_ (W)w); 3997 clear_pending (EV_A_ (W)w);
2108 if (expect_false (!ev_is_active (w))) 3998 if (expect_false (!ev_is_active (w)))
2109 return; 3999 return;
2110 4000
4001 EV_FREQUENT_CHECK;
4002
2111 { 4003 {
2112 int active = ((W)w)->active; 4004 int active = ev_active (w);
2113 4005
2114 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4006 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2115 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4007 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2116 4008
2117 ev_stop (EV_A_ (W)w); 4009 ev_stop (EV_A_ (W)w);
2118 --idleall; 4010 --idleall;
2119 } 4011 }
2120}
2121#endif
2122 4012
4013 EV_FREQUENT_CHECK;
4014}
4015#endif
4016
4017#if EV_PREPARE_ENABLE
2123void 4018void
2124ev_prepare_start (EV_P_ ev_prepare *w) 4019ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2125{ 4020{
2126 if (expect_false (ev_is_active (w))) 4021 if (expect_false (ev_is_active (w)))
2127 return; 4022 return;
4023
4024 EV_FREQUENT_CHECK;
2128 4025
2129 ev_start (EV_A_ (W)w, ++preparecnt); 4026 ev_start (EV_A_ (W)w, ++preparecnt);
2130 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4027 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2131 prepares [preparecnt - 1] = w; 4028 prepares [preparecnt - 1] = w;
4029
4030 EV_FREQUENT_CHECK;
2132} 4031}
2133 4032
2134void 4033void
2135ev_prepare_stop (EV_P_ ev_prepare *w) 4034ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2136{ 4035{
2137 clear_pending (EV_A_ (W)w); 4036 clear_pending (EV_A_ (W)w);
2138 if (expect_false (!ev_is_active (w))) 4037 if (expect_false (!ev_is_active (w)))
2139 return; 4038 return;
2140 4039
4040 EV_FREQUENT_CHECK;
4041
2141 { 4042 {
2142 int active = ((W)w)->active; 4043 int active = ev_active (w);
4044
2143 prepares [active - 1] = prepares [--preparecnt]; 4045 prepares [active - 1] = prepares [--preparecnt];
2144 ((W)prepares [active - 1])->active = active; 4046 ev_active (prepares [active - 1]) = active;
2145 } 4047 }
2146 4048
2147 ev_stop (EV_A_ (W)w); 4049 ev_stop (EV_A_ (W)w);
2148}
2149 4050
4051 EV_FREQUENT_CHECK;
4052}
4053#endif
4054
4055#if EV_CHECK_ENABLE
2150void 4056void
2151ev_check_start (EV_P_ ev_check *w) 4057ev_check_start (EV_P_ ev_check *w) EV_THROW
2152{ 4058{
2153 if (expect_false (ev_is_active (w))) 4059 if (expect_false (ev_is_active (w)))
2154 return; 4060 return;
4061
4062 EV_FREQUENT_CHECK;
2155 4063
2156 ev_start (EV_A_ (W)w, ++checkcnt); 4064 ev_start (EV_A_ (W)w, ++checkcnt);
2157 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4065 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2158 checks [checkcnt - 1] = w; 4066 checks [checkcnt - 1] = w;
4067
4068 EV_FREQUENT_CHECK;
2159} 4069}
2160 4070
2161void 4071void
2162ev_check_stop (EV_P_ ev_check *w) 4072ev_check_stop (EV_P_ ev_check *w) EV_THROW
2163{ 4073{
2164 clear_pending (EV_A_ (W)w); 4074 clear_pending (EV_A_ (W)w);
2165 if (expect_false (!ev_is_active (w))) 4075 if (expect_false (!ev_is_active (w)))
2166 return; 4076 return;
2167 4077
4078 EV_FREQUENT_CHECK;
4079
2168 { 4080 {
2169 int active = ((W)w)->active; 4081 int active = ev_active (w);
4082
2170 checks [active - 1] = checks [--checkcnt]; 4083 checks [active - 1] = checks [--checkcnt];
2171 ((W)checks [active - 1])->active = active; 4084 ev_active (checks [active - 1]) = active;
2172 } 4085 }
2173 4086
2174 ev_stop (EV_A_ (W)w); 4087 ev_stop (EV_A_ (W)w);
4088
4089 EV_FREQUENT_CHECK;
2175} 4090}
4091#endif
2176 4092
2177#if EV_EMBED_ENABLE 4093#if EV_EMBED_ENABLE
2178void noinline 4094void noinline
2179ev_embed_sweep (EV_P_ ev_embed *w) 4095ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2180{ 4096{
2181 ev_loop (w->loop, EVLOOP_NONBLOCK); 4097 ev_run (w->other, EVRUN_NOWAIT);
2182} 4098}
2183 4099
2184static void 4100static void
2185embed_cb (EV_P_ ev_io *io, int revents) 4101embed_io_cb (EV_P_ ev_io *io, int revents)
2186{ 4102{
2187 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4103 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2188 4104
2189 if (ev_cb (w)) 4105 if (ev_cb (w))
2190 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4106 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2191 else 4107 else
2192 ev_embed_sweep (loop, w); 4108 ev_run (w->other, EVRUN_NOWAIT);
2193} 4109}
4110
4111static void
4112embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4113{
4114 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4115
4116 {
4117 EV_P = w->other;
4118
4119 while (fdchangecnt)
4120 {
4121 fd_reify (EV_A);
4122 ev_run (EV_A_ EVRUN_NOWAIT);
4123 }
4124 }
4125}
4126
4127static void
4128embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4129{
4130 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4131
4132 ev_embed_stop (EV_A_ w);
4133
4134 {
4135 EV_P = w->other;
4136
4137 ev_loop_fork (EV_A);
4138 ev_run (EV_A_ EVRUN_NOWAIT);
4139 }
4140
4141 ev_embed_start (EV_A_ w);
4142}
4143
4144#if 0
4145static void
4146embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4147{
4148 ev_idle_stop (EV_A_ idle);
4149}
4150#endif
2194 4151
2195void 4152void
2196ev_embed_start (EV_P_ ev_embed *w) 4153ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2197{ 4154{
2198 if (expect_false (ev_is_active (w))) 4155 if (expect_false (ev_is_active (w)))
2199 return; 4156 return;
2200 4157
2201 { 4158 {
2202 struct ev_loop *loop = w->loop; 4159 EV_P = w->other;
2203 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4160 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2204 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4161 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2205 } 4162 }
4163
4164 EV_FREQUENT_CHECK;
2206 4165
2207 ev_set_priority (&w->io, ev_priority (w)); 4166 ev_set_priority (&w->io, ev_priority (w));
2208 ev_io_start (EV_A_ &w->io); 4167 ev_io_start (EV_A_ &w->io);
2209 4168
4169 ev_prepare_init (&w->prepare, embed_prepare_cb);
4170 ev_set_priority (&w->prepare, EV_MINPRI);
4171 ev_prepare_start (EV_A_ &w->prepare);
4172
4173 ev_fork_init (&w->fork, embed_fork_cb);
4174 ev_fork_start (EV_A_ &w->fork);
4175
4176 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4177
2210 ev_start (EV_A_ (W)w, 1); 4178 ev_start (EV_A_ (W)w, 1);
4179
4180 EV_FREQUENT_CHECK;
2211} 4181}
2212 4182
2213void 4183void
2214ev_embed_stop (EV_P_ ev_embed *w) 4184ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2215{ 4185{
2216 clear_pending (EV_A_ (W)w); 4186 clear_pending (EV_A_ (W)w);
2217 if (expect_false (!ev_is_active (w))) 4187 if (expect_false (!ev_is_active (w)))
2218 return; 4188 return;
2219 4189
4190 EV_FREQUENT_CHECK;
4191
2220 ev_io_stop (EV_A_ &w->io); 4192 ev_io_stop (EV_A_ &w->io);
4193 ev_prepare_stop (EV_A_ &w->prepare);
4194 ev_fork_stop (EV_A_ &w->fork);
2221 4195
2222 ev_stop (EV_A_ (W)w); 4196 ev_stop (EV_A_ (W)w);
4197
4198 EV_FREQUENT_CHECK;
2223} 4199}
2224#endif 4200#endif
2225 4201
2226#if EV_FORK_ENABLE 4202#if EV_FORK_ENABLE
2227void 4203void
2228ev_fork_start (EV_P_ ev_fork *w) 4204ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2229{ 4205{
2230 if (expect_false (ev_is_active (w))) 4206 if (expect_false (ev_is_active (w)))
2231 return; 4207 return;
4208
4209 EV_FREQUENT_CHECK;
2232 4210
2233 ev_start (EV_A_ (W)w, ++forkcnt); 4211 ev_start (EV_A_ (W)w, ++forkcnt);
2234 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4212 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2235 forks [forkcnt - 1] = w; 4213 forks [forkcnt - 1] = w;
4214
4215 EV_FREQUENT_CHECK;
2236} 4216}
2237 4217
2238void 4218void
2239ev_fork_stop (EV_P_ ev_fork *w) 4219ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2240{ 4220{
2241 clear_pending (EV_A_ (W)w); 4221 clear_pending (EV_A_ (W)w);
2242 if (expect_false (!ev_is_active (w))) 4222 if (expect_false (!ev_is_active (w)))
2243 return; 4223 return;
2244 4224
4225 EV_FREQUENT_CHECK;
4226
2245 { 4227 {
2246 int active = ((W)w)->active; 4228 int active = ev_active (w);
4229
2247 forks [active - 1] = forks [--forkcnt]; 4230 forks [active - 1] = forks [--forkcnt];
2248 ((W)forks [active - 1])->active = active; 4231 ev_active (forks [active - 1]) = active;
2249 } 4232 }
2250 4233
2251 ev_stop (EV_A_ (W)w); 4234 ev_stop (EV_A_ (W)w);
4235
4236 EV_FREQUENT_CHECK;
4237}
4238#endif
4239
4240#if EV_CLEANUP_ENABLE
4241void
4242ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4243{
4244 if (expect_false (ev_is_active (w)))
4245 return;
4246
4247 EV_FREQUENT_CHECK;
4248
4249 ev_start (EV_A_ (W)w, ++cleanupcnt);
4250 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4251 cleanups [cleanupcnt - 1] = w;
4252
4253 /* cleanup watchers should never keep a refcount on the loop */
4254 ev_unref (EV_A);
4255 EV_FREQUENT_CHECK;
4256}
4257
4258void
4259ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4260{
4261 clear_pending (EV_A_ (W)w);
4262 if (expect_false (!ev_is_active (w)))
4263 return;
4264
4265 EV_FREQUENT_CHECK;
4266 ev_ref (EV_A);
4267
4268 {
4269 int active = ev_active (w);
4270
4271 cleanups [active - 1] = cleanups [--cleanupcnt];
4272 ev_active (cleanups [active - 1]) = active;
4273 }
4274
4275 ev_stop (EV_A_ (W)w);
4276
4277 EV_FREQUENT_CHECK;
4278}
4279#endif
4280
4281#if EV_ASYNC_ENABLE
4282void
4283ev_async_start (EV_P_ ev_async *w) EV_THROW
4284{
4285 if (expect_false (ev_is_active (w)))
4286 return;
4287
4288 w->sent = 0;
4289
4290 evpipe_init (EV_A);
4291
4292 EV_FREQUENT_CHECK;
4293
4294 ev_start (EV_A_ (W)w, ++asynccnt);
4295 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4296 asyncs [asynccnt - 1] = w;
4297
4298 EV_FREQUENT_CHECK;
4299}
4300
4301void
4302ev_async_stop (EV_P_ ev_async *w) EV_THROW
4303{
4304 clear_pending (EV_A_ (W)w);
4305 if (expect_false (!ev_is_active (w)))
4306 return;
4307
4308 EV_FREQUENT_CHECK;
4309
4310 {
4311 int active = ev_active (w);
4312
4313 asyncs [active - 1] = asyncs [--asynccnt];
4314 ev_active (asyncs [active - 1]) = active;
4315 }
4316
4317 ev_stop (EV_A_ (W)w);
4318
4319 EV_FREQUENT_CHECK;
4320}
4321
4322void
4323ev_async_send (EV_P_ ev_async *w) EV_THROW
4324{
4325 w->sent = 1;
4326 evpipe_write (EV_A_ &async_pending);
2252} 4327}
2253#endif 4328#endif
2254 4329
2255/*****************************************************************************/ 4330/*****************************************************************************/
2256 4331
… …
2266once_cb (EV_P_ struct ev_once *once, int revents) 4341once_cb (EV_P_ struct ev_once *once, int revents)
2267{ 4342{
2268 void (*cb)(int revents, void *arg) = once->cb; 4343 void (*cb)(int revents, void *arg) = once->cb;
2269 void *arg = once->arg; 4344 void *arg = once->arg;
2270 4345
2271 ev_io_stop (EV_A_ &once->io); 4346 ev_io_stop (EV_A_ &once->io);
2272 ev_timer_stop (EV_A_ &once->to); 4347 ev_timer_stop (EV_A_ &once->to);
2273 ev_free (once); 4348 ev_free (once);
2274 4349
2275 cb (revents, arg); 4350 cb (revents, arg);
2276} 4351}
2277 4352
2278static void 4353static void
2279once_cb_io (EV_P_ ev_io *w, int revents) 4354once_cb_io (EV_P_ ev_io *w, int revents)
2280{ 4355{
2281 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4356 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4357
4358 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2282} 4359}
2283 4360
2284static void 4361static void
2285once_cb_to (EV_P_ ev_timer *w, int revents) 4362once_cb_to (EV_P_ ev_timer *w, int revents)
2286{ 4363{
2287 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4364 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4365
4366 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2288} 4367}
2289 4368
2290void 4369void
2291ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4370ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2292{ 4371{
2293 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4372 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2294 4373
2295 if (expect_false (!once)) 4374 if (expect_false (!once))
2296 { 4375 {
2297 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4376 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2298 return; 4377 return;
2299 } 4378 }
2300 4379
2301 once->cb = cb; 4380 once->cb = cb;
2302 once->arg = arg; 4381 once->arg = arg;
… …
2314 ev_timer_set (&once->to, timeout, 0.); 4393 ev_timer_set (&once->to, timeout, 0.);
2315 ev_timer_start (EV_A_ &once->to); 4394 ev_timer_start (EV_A_ &once->to);
2316 } 4395 }
2317} 4396}
2318 4397
2319#ifdef __cplusplus 4398/*****************************************************************************/
2320} 4399
4400#if EV_WALK_ENABLE
4401void ecb_cold
4402ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4403{
4404 int i, j;
4405 ev_watcher_list *wl, *wn;
4406
4407 if (types & (EV_IO | EV_EMBED))
4408 for (i = 0; i < anfdmax; ++i)
4409 for (wl = anfds [i].head; wl; )
4410 {
4411 wn = wl->next;
4412
4413#if EV_EMBED_ENABLE
4414 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4415 {
4416 if (types & EV_EMBED)
4417 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4418 }
4419 else
4420#endif
4421#if EV_USE_INOTIFY
4422 if (ev_cb ((ev_io *)wl) == infy_cb)
4423 ;
4424 else
4425#endif
4426 if ((ev_io *)wl != &pipe_w)
4427 if (types & EV_IO)
4428 cb (EV_A_ EV_IO, wl);
4429
4430 wl = wn;
4431 }
4432
4433 if (types & (EV_TIMER | EV_STAT))
4434 for (i = timercnt + HEAP0; i-- > HEAP0; )
4435#if EV_STAT_ENABLE
4436 /*TODO: timer is not always active*/
4437 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4438 {
4439 if (types & EV_STAT)
4440 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4441 }
4442 else
4443#endif
4444 if (types & EV_TIMER)
4445 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4446
4447#if EV_PERIODIC_ENABLE
4448 if (types & EV_PERIODIC)
4449 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4450 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4451#endif
4452
4453#if EV_IDLE_ENABLE
4454 if (types & EV_IDLE)
4455 for (j = NUMPRI; j--; )
4456 for (i = idlecnt [j]; i--; )
4457 cb (EV_A_ EV_IDLE, idles [j][i]);
4458#endif
4459
4460#if EV_FORK_ENABLE
4461 if (types & EV_FORK)
4462 for (i = forkcnt; i--; )
4463 if (ev_cb (forks [i]) != embed_fork_cb)
4464 cb (EV_A_ EV_FORK, forks [i]);
4465#endif
4466
4467#if EV_ASYNC_ENABLE
4468 if (types & EV_ASYNC)
4469 for (i = asynccnt; i--; )
4470 cb (EV_A_ EV_ASYNC, asyncs [i]);
4471#endif
4472
4473#if EV_PREPARE_ENABLE
4474 if (types & EV_PREPARE)
4475 for (i = preparecnt; i--; )
4476# if EV_EMBED_ENABLE
4477 if (ev_cb (prepares [i]) != embed_prepare_cb)
2321#endif 4478# endif
4479 cb (EV_A_ EV_PREPARE, prepares [i]);
4480#endif
2322 4481
4482#if EV_CHECK_ENABLE
4483 if (types & EV_CHECK)
4484 for (i = checkcnt; i--; )
4485 cb (EV_A_ EV_CHECK, checks [i]);
4486#endif
4487
4488#if EV_SIGNAL_ENABLE
4489 if (types & EV_SIGNAL)
4490 for (i = 0; i < EV_NSIG - 1; ++i)
4491 for (wl = signals [i].head; wl; )
4492 {
4493 wn = wl->next;
4494 cb (EV_A_ EV_SIGNAL, wl);
4495 wl = wn;
4496 }
4497#endif
4498
4499#if EV_CHILD_ENABLE
4500 if (types & EV_CHILD)
4501 for (i = (EV_PID_HASHSIZE); i--; )
4502 for (wl = childs [i]; wl; )
4503 {
4504 wn = wl->next;
4505 cb (EV_A_ EV_CHILD, wl);
4506 wl = wn;
4507 }
4508#endif
4509/* EV_STAT 0x00001000 /* stat data changed */
4510/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4511}
4512#endif
4513
4514#if EV_MULTIPLICITY
4515 #include "ev_wrap.h"
4516#endif
4517

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