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Comparing libev/ev.c (file contents):
Revision 1.167 by root, Sat Dec 8 04:02:31 2007 UTC vs.
Revision 1.432 by root, Mon May 14 19:09:58 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
206# include <winsock2.h>
135# include <windows.h> 207# include <windows.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
207#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h>
209#endif
210
211#if !EV_STAT_ENABLE 394#if !EV_STAT_ENABLE
395# undef EV_USE_INOTIFY
212# define EV_USE_INOTIFY 0 396# define EV_USE_INOTIFY 0
213#endif 397#endif
214 398
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
215#if EV_USE_INOTIFY 406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
216# include <sys/inotify.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
416#if EV_USE_EVENTFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef EFD_NONBLOCK
420# define EFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef EFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define EFD_CLOEXEC O_CLOEXEC
425# else
426# define EFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
430#endif
431
432#if EV_USE_SIGNALFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef SFD_NONBLOCK
436# define SFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef SFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define SFD_CLOEXEC O_CLOEXEC
441# else
442# define SFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
446
447struct signalfd_siginfo
448{
449 uint32_t ssi_signo;
450 char pad[128 - sizeof (uint32_t)];
451};
217#endif 452#endif
218 453
219/**/ 454/**/
455
456#if EV_VERIFY >= 3
457# define EV_FREQUENT_CHECK ev_verify (EV_A)
458#else
459# define EV_FREQUENT_CHECK do { } while (0)
460#endif
461
462/*
463 * This is used to work around floating point rounding problems.
464 * This value is good at least till the year 4000.
465 */
466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
220 468
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
224 471
472#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
473#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
493 *
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
504 */
505
506#ifndef ECB_H
507#define ECB_H
508
509#ifdef _WIN32
510 typedef signed char int8_t;
511 typedef unsigned char uint8_t;
512 typedef signed short int16_t;
513 typedef unsigned short uint16_t;
514 typedef signed int int32_t;
515 typedef unsigned int uint32_t;
225#if __GNUC__ >= 3 516 #if __GNUC__
226# define expect(expr,value) __builtin_expect ((expr),(value)) 517 typedef signed long long int64_t;
227# define inline_size static inline /* inline for codesize */ 518 typedef unsigned long long uint64_t;
228# if EV_MINIMAL 519 #else /* _MSC_VER || __BORLANDC__ */
229# define noinline __attribute__ ((noinline)) 520 typedef signed __int64 int64_t;
230# define inline_speed static noinline 521 typedef unsigned __int64 uint64_t;
231# else
232# define noinline
233# define inline_speed static inline
234# endif 522 #endif
235#else 523#else
524 #include <inttypes.h>
525#endif
526
527/* many compilers define _GNUC_ to some versions but then only implement
528 * what their idiot authors think are the "more important" extensions,
529 * causing enormous grief in return for some better fake benchmark numbers.
530 * or so.
531 * we try to detect these and simply assume they are not gcc - if they have
532 * an issue with that they should have done it right in the first place.
533 */
534#ifndef ECB_GCC_VERSION
535 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
536 #define ECB_GCC_VERSION(major,minor) 0
537 #else
538 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
539 #endif
540#endif
541
542/*****************************************************************************/
543
544/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
545/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
546
547#if ECB_NO_THREADS
548# define ECB_NO_SMP 1
549#endif
550
551#if ECB_NO_THREADS || ECB_NO_SMP
552 #define ECB_MEMORY_FENCE do { } while (0)
553#endif
554
555#ifndef ECB_MEMORY_FENCE
556 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
557 #if __i386 || __i386__
558 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
559 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
560 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
561 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
563 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
564 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
565 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
566 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
567 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
568 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
570 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
571 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
573 #elif __sparc || __sparc__
574 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
575 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
576 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
577 #elif defined __s390__ || defined __s390x__
578 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
579 #elif defined __mips__
580 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
581 #elif defined __alpha__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
583 #endif
584 #endif
585#endif
586
587#ifndef ECB_MEMORY_FENCE
588 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
589 #define ECB_MEMORY_FENCE __sync_synchronize ()
590 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
591 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
592 #elif _MSC_VER >= 1400 /* VC++ 2005 */
593 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
594 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
595 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
596 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
597 #elif defined _WIN32
598 #include <WinNT.h>
599 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
600 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
601 #include <mbarrier.h>
602 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
603 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
604 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
605 #elif __xlC__
606 #define ECB_MEMORY_FENCE __sync ()
607 #endif
608#endif
609
610#ifndef ECB_MEMORY_FENCE
611 #if !ECB_AVOID_PTHREADS
612 /*
613 * if you get undefined symbol references to pthread_mutex_lock,
614 * or failure to find pthread.h, then you should implement
615 * the ECB_MEMORY_FENCE operations for your cpu/compiler
616 * OR provide pthread.h and link against the posix thread library
617 * of your system.
618 */
619 #include <pthread.h>
620 #define ECB_NEEDS_PTHREADS 1
621 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
622
623 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
624 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
625 #endif
626#endif
627
628#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
629 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
630#endif
631
632#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
633 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
634#endif
635
636/*****************************************************************************/
637
638#define ECB_C99 (__STDC_VERSION__ >= 199901L)
639
640#if __cplusplus
641 #define ecb_inline static inline
642#elif ECB_GCC_VERSION(2,5)
643 #define ecb_inline static __inline__
644#elif ECB_C99
645 #define ecb_inline static inline
646#else
647 #define ecb_inline static
648#endif
649
650#if ECB_GCC_VERSION(3,3)
651 #define ecb_restrict __restrict__
652#elif ECB_C99
653 #define ecb_restrict restrict
654#else
655 #define ecb_restrict
656#endif
657
658typedef int ecb_bool;
659
660#define ECB_CONCAT_(a, b) a ## b
661#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
662#define ECB_STRINGIFY_(a) # a
663#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
664
665#define ecb_function_ ecb_inline
666
667#if ECB_GCC_VERSION(3,1)
668 #define ecb_attribute(attrlist) __attribute__(attrlist)
669 #define ecb_is_constant(expr) __builtin_constant_p (expr)
670 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
671 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
672#else
673 #define ecb_attribute(attrlist)
674 #define ecb_is_constant(expr) 0
236# define expect(expr,value) (expr) 675 #define ecb_expect(expr,value) (expr)
237# define inline_speed static 676 #define ecb_prefetch(addr,rw,locality)
238# define inline_size static
239# define noinline
240#endif 677#endif
241 678
679/* no emulation for ecb_decltype */
680#if ECB_GCC_VERSION(4,5)
681 #define ecb_decltype(x) __decltype(x)
682#elif ECB_GCC_VERSION(3,0)
683 #define ecb_decltype(x) __typeof(x)
684#endif
685
686#define ecb_noinline ecb_attribute ((__noinline__))
687#define ecb_noreturn ecb_attribute ((__noreturn__))
688#define ecb_unused ecb_attribute ((__unused__))
689#define ecb_const ecb_attribute ((__const__))
690#define ecb_pure ecb_attribute ((__pure__))
691
692#if ECB_GCC_VERSION(4,3)
693 #define ecb_artificial ecb_attribute ((__artificial__))
694 #define ecb_hot ecb_attribute ((__hot__))
695 #define ecb_cold ecb_attribute ((__cold__))
696#else
697 #define ecb_artificial
698 #define ecb_hot
699 #define ecb_cold
700#endif
701
702/* put around conditional expressions if you are very sure that the */
703/* expression is mostly true or mostly false. note that these return */
704/* booleans, not the expression. */
242#define expect_false(expr) expect ((expr) != 0, 0) 705#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
243#define expect_true(expr) expect ((expr) != 0, 1) 706#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
707/* for compatibility to the rest of the world */
708#define ecb_likely(expr) ecb_expect_true (expr)
709#define ecb_unlikely(expr) ecb_expect_false (expr)
244 710
711/* count trailing zero bits and count # of one bits */
712#if ECB_GCC_VERSION(3,4)
713 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
714 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
715 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
716 #define ecb_ctz32(x) __builtin_ctz (x)
717 #define ecb_ctz64(x) __builtin_ctzll (x)
718 #define ecb_popcount32(x) __builtin_popcount (x)
719 /* no popcountll */
720#else
721 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
722 ecb_function_ int
723 ecb_ctz32 (uint32_t x)
724 {
725 int r = 0;
726
727 x &= ~x + 1; /* this isolates the lowest bit */
728
729#if ECB_branchless_on_i386
730 r += !!(x & 0xaaaaaaaa) << 0;
731 r += !!(x & 0xcccccccc) << 1;
732 r += !!(x & 0xf0f0f0f0) << 2;
733 r += !!(x & 0xff00ff00) << 3;
734 r += !!(x & 0xffff0000) << 4;
735#else
736 if (x & 0xaaaaaaaa) r += 1;
737 if (x & 0xcccccccc) r += 2;
738 if (x & 0xf0f0f0f0) r += 4;
739 if (x & 0xff00ff00) r += 8;
740 if (x & 0xffff0000) r += 16;
741#endif
742
743 return r;
744 }
745
746 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
747 ecb_function_ int
748 ecb_ctz64 (uint64_t x)
749 {
750 int shift = x & 0xffffffffU ? 0 : 32;
751 return ecb_ctz32 (x >> shift) + shift;
752 }
753
754 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
755 ecb_function_ int
756 ecb_popcount32 (uint32_t x)
757 {
758 x -= (x >> 1) & 0x55555555;
759 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
760 x = ((x >> 4) + x) & 0x0f0f0f0f;
761 x *= 0x01010101;
762
763 return x >> 24;
764 }
765
766 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
767 ecb_function_ int ecb_ld32 (uint32_t x)
768 {
769 int r = 0;
770
771 if (x >> 16) { x >>= 16; r += 16; }
772 if (x >> 8) { x >>= 8; r += 8; }
773 if (x >> 4) { x >>= 4; r += 4; }
774 if (x >> 2) { x >>= 2; r += 2; }
775 if (x >> 1) { r += 1; }
776
777 return r;
778 }
779
780 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
781 ecb_function_ int ecb_ld64 (uint64_t x)
782 {
783 int r = 0;
784
785 if (x >> 32) { x >>= 32; r += 32; }
786
787 return r + ecb_ld32 (x);
788 }
789#endif
790
791ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
792ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
793{
794 return ( (x * 0x0802U & 0x22110U)
795 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
796}
797
798ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
799ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
800{
801 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
802 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
803 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
804 x = ( x >> 8 ) | ( x << 8);
805
806 return x;
807}
808
809ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
810ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
811{
812 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
813 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
814 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
815 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
816 x = ( x >> 16 ) | ( x << 16);
817
818 return x;
819}
820
821/* popcount64 is only available on 64 bit cpus as gcc builtin */
822/* so for this version we are lazy */
823ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
824ecb_function_ int
825ecb_popcount64 (uint64_t x)
826{
827 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
828}
829
830ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
831ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
832ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
833ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
834ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
835ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
836ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
837ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
838
839ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
840ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
841ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
842ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
843ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
844ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
845ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
846ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
847
848#if ECB_GCC_VERSION(4,3)
849 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
850 #define ecb_bswap32(x) __builtin_bswap32 (x)
851 #define ecb_bswap64(x) __builtin_bswap64 (x)
852#else
853 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
854 ecb_function_ uint16_t
855 ecb_bswap16 (uint16_t x)
856 {
857 return ecb_rotl16 (x, 8);
858 }
859
860 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
861 ecb_function_ uint32_t
862 ecb_bswap32 (uint32_t x)
863 {
864 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
865 }
866
867 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
868 ecb_function_ uint64_t
869 ecb_bswap64 (uint64_t x)
870 {
871 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
872 }
873#endif
874
875#if ECB_GCC_VERSION(4,5)
876 #define ecb_unreachable() __builtin_unreachable ()
877#else
878 /* this seems to work fine, but gcc always emits a warning for it :/ */
879 ecb_inline void ecb_unreachable (void) ecb_noreturn;
880 ecb_inline void ecb_unreachable (void) { }
881#endif
882
883/* try to tell the compiler that some condition is definitely true */
884#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
885
886ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
887ecb_inline unsigned char
888ecb_byteorder_helper (void)
889{
890 const uint32_t u = 0x11223344;
891 return *(unsigned char *)&u;
892}
893
894ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
895ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
896ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
897ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
898
899#if ECB_GCC_VERSION(3,0) || ECB_C99
900 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
901#else
902 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
903#endif
904
905#if __cplusplus
906 template<typename T>
907 static inline T ecb_div_rd (T val, T div)
908 {
909 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
910 }
911 template<typename T>
912 static inline T ecb_div_ru (T val, T div)
913 {
914 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
915 }
916#else
917 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
918 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
919#endif
920
921#if ecb_cplusplus_does_not_suck
922 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
923 template<typename T, int N>
924 static inline int ecb_array_length (const T (&arr)[N])
925 {
926 return N;
927 }
928#else
929 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
930#endif
931
932#endif
933
934/* ECB.H END */
935
936#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
937/* if your architecture doesn't need memory fences, e.g. because it is
938 * single-cpu/core, or if you use libev in a project that doesn't use libev
939 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
940 * libev, in which cases the memory fences become nops.
941 * alternatively, you can remove this #error and link against libpthread,
942 * which will then provide the memory fences.
943 */
944# error "memory fences not defined for your architecture, please report"
945#endif
946
947#ifndef ECB_MEMORY_FENCE
948# define ECB_MEMORY_FENCE do { } while (0)
949# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
950# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
951#endif
952
953#define expect_false(cond) ecb_expect_false (cond)
954#define expect_true(cond) ecb_expect_true (cond)
955#define noinline ecb_noinline
956
957#define inline_size ecb_inline
958
959#if EV_FEATURE_CODE
960# define inline_speed ecb_inline
961#else
962# define inline_speed static noinline
963#endif
964
245#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 965#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
966
967#if EV_MINPRI == EV_MAXPRI
968# define ABSPRI(w) (((W)w), 0)
969#else
246#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 970# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
971#endif
247 972
248#define EMPTY /* required for microsofts broken pseudo-c compiler */ 973#define EMPTY /* required for microsofts broken pseudo-c compiler */
249#define EMPTY2(a,b) /* used to suppress some warnings */ 974#define EMPTY2(a,b) /* used to suppress some warnings */
250 975
251typedef ev_watcher *W; 976typedef ev_watcher *W;
252typedef ev_watcher_list *WL; 977typedef ev_watcher_list *WL;
253typedef ev_watcher_time *WT; 978typedef ev_watcher_time *WT;
254 979
980#define ev_active(w) ((W)(w))->active
981#define ev_at(w) ((WT)(w))->at
982
983#if EV_USE_REALTIME
984/* sig_atomic_t is used to avoid per-thread variables or locking but still */
985/* giving it a reasonably high chance of working on typical architectures */
986static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
987#endif
988
989#if EV_USE_MONOTONIC
255static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 990static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
991#endif
992
993#ifndef EV_FD_TO_WIN32_HANDLE
994# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
995#endif
996#ifndef EV_WIN32_HANDLE_TO_FD
997# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
998#endif
999#ifndef EV_WIN32_CLOSE_FD
1000# define EV_WIN32_CLOSE_FD(fd) close (fd)
1001#endif
256 1002
257#ifdef _WIN32 1003#ifdef _WIN32
258# include "ev_win32.c" 1004# include "ev_win32.c"
259#endif 1005#endif
260 1006
261/*****************************************************************************/ 1007/*****************************************************************************/
262 1008
1009/* define a suitable floor function (only used by periodics atm) */
1010
1011#if EV_USE_FLOOR
1012# include <math.h>
1013# define ev_floor(v) floor (v)
1014#else
1015
1016#include <float.h>
1017
1018/* a floor() replacement function, should be independent of ev_tstamp type */
1019static ev_tstamp noinline
1020ev_floor (ev_tstamp v)
1021{
1022 /* the choice of shift factor is not terribly important */
1023#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1024 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1025#else
1026 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1027#endif
1028
1029 /* argument too large for an unsigned long? */
1030 if (expect_false (v >= shift))
1031 {
1032 ev_tstamp f;
1033
1034 if (v == v - 1.)
1035 return v; /* very large number */
1036
1037 f = shift * ev_floor (v * (1. / shift));
1038 return f + ev_floor (v - f);
1039 }
1040
1041 /* special treatment for negative args? */
1042 if (expect_false (v < 0.))
1043 {
1044 ev_tstamp f = -ev_floor (-v);
1045
1046 return f - (f == v ? 0 : 1);
1047 }
1048
1049 /* fits into an unsigned long */
1050 return (unsigned long)v;
1051}
1052
1053#endif
1054
1055/*****************************************************************************/
1056
1057#ifdef __linux
1058# include <sys/utsname.h>
1059#endif
1060
1061static unsigned int noinline ecb_cold
1062ev_linux_version (void)
1063{
1064#ifdef __linux
1065 unsigned int v = 0;
1066 struct utsname buf;
1067 int i;
1068 char *p = buf.release;
1069
1070 if (uname (&buf))
1071 return 0;
1072
1073 for (i = 3+1; --i; )
1074 {
1075 unsigned int c = 0;
1076
1077 for (;;)
1078 {
1079 if (*p >= '0' && *p <= '9')
1080 c = c * 10 + *p++ - '0';
1081 else
1082 {
1083 p += *p == '.';
1084 break;
1085 }
1086 }
1087
1088 v = (v << 8) | c;
1089 }
1090
1091 return v;
1092#else
1093 return 0;
1094#endif
1095}
1096
1097/*****************************************************************************/
1098
1099#if EV_AVOID_STDIO
1100static void noinline ecb_cold
1101ev_printerr (const char *msg)
1102{
1103 write (STDERR_FILENO, msg, strlen (msg));
1104}
1105#endif
1106
263static void (*syserr_cb)(const char *msg); 1107static void (*syserr_cb)(const char *msg) EV_THROW;
264 1108
265void 1109void ecb_cold
266ev_set_syserr_cb (void (*cb)(const char *msg)) 1110ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
267{ 1111{
268 syserr_cb = cb; 1112 syserr_cb = cb;
269} 1113}
270 1114
271static void noinline 1115static void noinline ecb_cold
272syserr (const char *msg) 1116ev_syserr (const char *msg)
273{ 1117{
274 if (!msg) 1118 if (!msg)
275 msg = "(libev) system error"; 1119 msg = "(libev) system error";
276 1120
277 if (syserr_cb) 1121 if (syserr_cb)
278 syserr_cb (msg); 1122 syserr_cb (msg);
279 else 1123 else
280 { 1124 {
1125#if EV_AVOID_STDIO
1126 ev_printerr (msg);
1127 ev_printerr (": ");
1128 ev_printerr (strerror (errno));
1129 ev_printerr ("\n");
1130#else
281 perror (msg); 1131 perror (msg);
1132#endif
282 abort (); 1133 abort ();
283 } 1134 }
284} 1135}
285 1136
1137static void *
1138ev_realloc_emul (void *ptr, long size)
1139{
1140#if __GLIBC__
1141 return realloc (ptr, size);
1142#else
1143 /* some systems, notably openbsd and darwin, fail to properly
1144 * implement realloc (x, 0) (as required by both ansi c-89 and
1145 * the single unix specification, so work around them here.
1146 */
1147
1148 if (size)
1149 return realloc (ptr, size);
1150
1151 free (ptr);
1152 return 0;
1153#endif
1154}
1155
286static void *(*alloc)(void *ptr, long size); 1156static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
287 1157
288void 1158void ecb_cold
289ev_set_allocator (void *(*cb)(void *ptr, long size)) 1159ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
290{ 1160{
291 alloc = cb; 1161 alloc = cb;
292} 1162}
293 1163
294inline_speed void * 1164inline_speed void *
295ev_realloc (void *ptr, long size) 1165ev_realloc (void *ptr, long size)
296{ 1166{
297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1167 ptr = alloc (ptr, size);
298 1168
299 if (!ptr && size) 1169 if (!ptr && size)
300 { 1170 {
1171#if EV_AVOID_STDIO
1172 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1173#else
301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1174 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1175#endif
302 abort (); 1176 abort ();
303 } 1177 }
304 1178
305 return ptr; 1179 return ptr;
306} 1180}
… …
308#define ev_malloc(size) ev_realloc (0, (size)) 1182#define ev_malloc(size) ev_realloc (0, (size))
309#define ev_free(ptr) ev_realloc ((ptr), 0) 1183#define ev_free(ptr) ev_realloc ((ptr), 0)
310 1184
311/*****************************************************************************/ 1185/*****************************************************************************/
312 1186
1187/* set in reify when reification needed */
1188#define EV_ANFD_REIFY 1
1189
1190/* file descriptor info structure */
313typedef struct 1191typedef struct
314{ 1192{
315 WL head; 1193 WL head;
316 unsigned char events; 1194 unsigned char events; /* the events watched for */
1195 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1196 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
317 unsigned char reify; 1197 unsigned char unused;
1198#if EV_USE_EPOLL
1199 unsigned int egen; /* generation counter to counter epoll bugs */
1200#endif
318#if EV_SELECT_IS_WINSOCKET 1201#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
319 SOCKET handle; 1202 SOCKET handle;
320#endif 1203#endif
1204#if EV_USE_IOCP
1205 OVERLAPPED or, ow;
1206#endif
321} ANFD; 1207} ANFD;
322 1208
1209/* stores the pending event set for a given watcher */
323typedef struct 1210typedef struct
324{ 1211{
325 W w; 1212 W w;
326 int events; 1213 int events; /* the pending event set for the given watcher */
327} ANPENDING; 1214} ANPENDING;
328 1215
329#if EV_USE_INOTIFY 1216#if EV_USE_INOTIFY
1217/* hash table entry per inotify-id */
330typedef struct 1218typedef struct
331{ 1219{
332 WL head; 1220 WL head;
333} ANFS; 1221} ANFS;
1222#endif
1223
1224/* Heap Entry */
1225#if EV_HEAP_CACHE_AT
1226 /* a heap element */
1227 typedef struct {
1228 ev_tstamp at;
1229 WT w;
1230 } ANHE;
1231
1232 #define ANHE_w(he) (he).w /* access watcher, read-write */
1233 #define ANHE_at(he) (he).at /* access cached at, read-only */
1234 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1235#else
1236 /* a heap element */
1237 typedef WT ANHE;
1238
1239 #define ANHE_w(he) (he)
1240 #define ANHE_at(he) (he)->at
1241 #define ANHE_at_cache(he)
334#endif 1242#endif
335 1243
336#if EV_MULTIPLICITY 1244#if EV_MULTIPLICITY
337 1245
338 struct ev_loop 1246 struct ev_loop
… …
344 #undef VAR 1252 #undef VAR
345 }; 1253 };
346 #include "ev_wrap.h" 1254 #include "ev_wrap.h"
347 1255
348 static struct ev_loop default_loop_struct; 1256 static struct ev_loop default_loop_struct;
349 struct ev_loop *ev_default_loop_ptr; 1257 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
350 1258
351#else 1259#else
352 1260
353 ev_tstamp ev_rt_now; 1261 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
354 #define VAR(name,decl) static decl; 1262 #define VAR(name,decl) static decl;
355 #include "ev_vars.h" 1263 #include "ev_vars.h"
356 #undef VAR 1264 #undef VAR
357 1265
358 static int ev_default_loop_ptr; 1266 static int ev_default_loop_ptr;
359 1267
360#endif 1268#endif
361 1269
1270#if EV_FEATURE_API
1271# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1272# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1273# define EV_INVOKE_PENDING invoke_cb (EV_A)
1274#else
1275# define EV_RELEASE_CB (void)0
1276# define EV_ACQUIRE_CB (void)0
1277# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1278#endif
1279
1280#define EVBREAK_RECURSE 0x80
1281
362/*****************************************************************************/ 1282/*****************************************************************************/
363 1283
1284#ifndef EV_HAVE_EV_TIME
364ev_tstamp 1285ev_tstamp
365ev_time (void) 1286ev_time (void) EV_THROW
366{ 1287{
367#if EV_USE_REALTIME 1288#if EV_USE_REALTIME
1289 if (expect_true (have_realtime))
1290 {
368 struct timespec ts; 1291 struct timespec ts;
369 clock_gettime (CLOCK_REALTIME, &ts); 1292 clock_gettime (CLOCK_REALTIME, &ts);
370 return ts.tv_sec + ts.tv_nsec * 1e-9; 1293 return ts.tv_sec + ts.tv_nsec * 1e-9;
371#else 1294 }
1295#endif
1296
372 struct timeval tv; 1297 struct timeval tv;
373 gettimeofday (&tv, 0); 1298 gettimeofday (&tv, 0);
374 return tv.tv_sec + tv.tv_usec * 1e-6; 1299 return tv.tv_sec + tv.tv_usec * 1e-6;
375#endif
376} 1300}
1301#endif
377 1302
378ev_tstamp inline_size 1303inline_size ev_tstamp
379get_clock (void) 1304get_clock (void)
380{ 1305{
381#if EV_USE_MONOTONIC 1306#if EV_USE_MONOTONIC
382 if (expect_true (have_monotonic)) 1307 if (expect_true (have_monotonic))
383 { 1308 {
… …
390 return ev_time (); 1315 return ev_time ();
391} 1316}
392 1317
393#if EV_MULTIPLICITY 1318#if EV_MULTIPLICITY
394ev_tstamp 1319ev_tstamp
395ev_now (EV_P) 1320ev_now (EV_P) EV_THROW
396{ 1321{
397 return ev_rt_now; 1322 return ev_rt_now;
398} 1323}
399#endif 1324#endif
400 1325
401int inline_size 1326void
1327ev_sleep (ev_tstamp delay) EV_THROW
1328{
1329 if (delay > 0.)
1330 {
1331#if EV_USE_NANOSLEEP
1332 struct timespec ts;
1333
1334 EV_TS_SET (ts, delay);
1335 nanosleep (&ts, 0);
1336#elif defined _WIN32
1337 Sleep ((unsigned long)(delay * 1e3));
1338#else
1339 struct timeval tv;
1340
1341 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1342 /* something not guaranteed by newer posix versions, but guaranteed */
1343 /* by older ones */
1344 EV_TV_SET (tv, delay);
1345 select (0, 0, 0, 0, &tv);
1346#endif
1347 }
1348}
1349
1350/*****************************************************************************/
1351
1352#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1353
1354/* find a suitable new size for the given array, */
1355/* hopefully by rounding to a nice-to-malloc size */
1356inline_size int
402array_nextsize (int elem, int cur, int cnt) 1357array_nextsize (int elem, int cur, int cnt)
403{ 1358{
404 int ncur = cur + 1; 1359 int ncur = cur + 1;
405 1360
406 do 1361 do
407 ncur <<= 1; 1362 ncur <<= 1;
408 while (cnt > ncur); 1363 while (cnt > ncur);
409 1364
410 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1365 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
411 if (elem * ncur > 4096) 1366 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
412 { 1367 {
413 ncur *= elem; 1368 ncur *= elem;
414 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1369 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
415 ncur = ncur - sizeof (void *) * 4; 1370 ncur = ncur - sizeof (void *) * 4;
416 ncur /= elem; 1371 ncur /= elem;
417 } 1372 }
418 1373
419 return ncur; 1374 return ncur;
420} 1375}
421 1376
422inline_speed void * 1377static void * noinline ecb_cold
423array_realloc (int elem, void *base, int *cur, int cnt) 1378array_realloc (int elem, void *base, int *cur, int cnt)
424{ 1379{
425 *cur = array_nextsize (elem, *cur, cnt); 1380 *cur = array_nextsize (elem, *cur, cnt);
426 return ev_realloc (base, elem * *cur); 1381 return ev_realloc (base, elem * *cur);
427} 1382}
1383
1384#define array_init_zero(base,count) \
1385 memset ((void *)(base), 0, sizeof (*(base)) * (count))
428 1386
429#define array_needsize(type,base,cur,cnt,init) \ 1387#define array_needsize(type,base,cur,cnt,init) \
430 if (expect_false ((cnt) > (cur))) \ 1388 if (expect_false ((cnt) > (cur))) \
431 { \ 1389 { \
432 int ocur_ = (cur); \ 1390 int ecb_unused ocur_ = (cur); \
433 (base) = (type *)array_realloc \ 1391 (base) = (type *)array_realloc \
434 (sizeof (type), (base), &(cur), (cnt)); \ 1392 (sizeof (type), (base), &(cur), (cnt)); \
435 init ((base) + (ocur_), (cur) - ocur_); \ 1393 init ((base) + (ocur_), (cur) - ocur_); \
436 } 1394 }
437 1395
… …
444 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1402 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
445 } 1403 }
446#endif 1404#endif
447 1405
448#define array_free(stem, idx) \ 1406#define array_free(stem, idx) \
449 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1407 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
450 1408
451/*****************************************************************************/ 1409/*****************************************************************************/
452 1410
1411/* dummy callback for pending events */
1412static void noinline
1413pendingcb (EV_P_ ev_prepare *w, int revents)
1414{
1415}
1416
453void noinline 1417void noinline
454ev_feed_event (EV_P_ void *w, int revents) 1418ev_feed_event (EV_P_ void *w, int revents) EV_THROW
455{ 1419{
456 W w_ = (W)w; 1420 W w_ = (W)w;
1421 int pri = ABSPRI (w_);
457 1422
458 if (expect_false (w_->pending)) 1423 if (expect_false (w_->pending))
1424 pendings [pri][w_->pending - 1].events |= revents;
1425 else
459 { 1426 {
1427 w_->pending = ++pendingcnt [pri];
1428 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1429 pendings [pri][w_->pending - 1].w = w_;
460 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1430 pendings [pri][w_->pending - 1].events = revents;
461 return;
462 } 1431 }
463 1432
464 w_->pending = ++pendingcnt [ABSPRI (w_)]; 1433 pendingpri = NUMPRI - 1;
465 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
466 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
467 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
468} 1434}
469 1435
470void inline_size 1436inline_speed void
1437feed_reverse (EV_P_ W w)
1438{
1439 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1440 rfeeds [rfeedcnt++] = w;
1441}
1442
1443inline_size void
1444feed_reverse_done (EV_P_ int revents)
1445{
1446 do
1447 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1448 while (rfeedcnt);
1449}
1450
1451inline_speed void
471queue_events (EV_P_ W *events, int eventcnt, int type) 1452queue_events (EV_P_ W *events, int eventcnt, int type)
472{ 1453{
473 int i; 1454 int i;
474 1455
475 for (i = 0; i < eventcnt; ++i) 1456 for (i = 0; i < eventcnt; ++i)
476 ev_feed_event (EV_A_ events [i], type); 1457 ev_feed_event (EV_A_ events [i], type);
477} 1458}
478 1459
479/*****************************************************************************/ 1460/*****************************************************************************/
480 1461
481void inline_size 1462inline_speed void
482anfds_init (ANFD *base, int count)
483{
484 while (count--)
485 {
486 base->head = 0;
487 base->events = EV_NONE;
488 base->reify = 0;
489
490 ++base;
491 }
492}
493
494void inline_speed
495fd_event (EV_P_ int fd, int revents) 1463fd_event_nocheck (EV_P_ int fd, int revents)
496{ 1464{
497 ANFD *anfd = anfds + fd; 1465 ANFD *anfd = anfds + fd;
498 ev_io *w; 1466 ev_io *w;
499 1467
500 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1468 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
504 if (ev) 1472 if (ev)
505 ev_feed_event (EV_A_ (W)w, ev); 1473 ev_feed_event (EV_A_ (W)w, ev);
506 } 1474 }
507} 1475}
508 1476
1477/* do not submit kernel events for fds that have reify set */
1478/* because that means they changed while we were polling for new events */
1479inline_speed void
1480fd_event (EV_P_ int fd, int revents)
1481{
1482 ANFD *anfd = anfds + fd;
1483
1484 if (expect_true (!anfd->reify))
1485 fd_event_nocheck (EV_A_ fd, revents);
1486}
1487
509void 1488void
510ev_feed_fd_event (EV_P_ int fd, int revents) 1489ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
511{ 1490{
1491 if (fd >= 0 && fd < anfdmax)
512 fd_event (EV_A_ fd, revents); 1492 fd_event_nocheck (EV_A_ fd, revents);
513} 1493}
514 1494
515void inline_size 1495/* make sure the external fd watch events are in-sync */
1496/* with the kernel/libev internal state */
1497inline_size void
516fd_reify (EV_P) 1498fd_reify (EV_P)
517{ 1499{
518 int i; 1500 int i;
1501
1502#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1503 for (i = 0; i < fdchangecnt; ++i)
1504 {
1505 int fd = fdchanges [i];
1506 ANFD *anfd = anfds + fd;
1507
1508 if (anfd->reify & EV__IOFDSET && anfd->head)
1509 {
1510 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1511
1512 if (handle != anfd->handle)
1513 {
1514 unsigned long arg;
1515
1516 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1517
1518 /* handle changed, but fd didn't - we need to do it in two steps */
1519 backend_modify (EV_A_ fd, anfd->events, 0);
1520 anfd->events = 0;
1521 anfd->handle = handle;
1522 }
1523 }
1524 }
1525#endif
519 1526
520 for (i = 0; i < fdchangecnt; ++i) 1527 for (i = 0; i < fdchangecnt; ++i)
521 { 1528 {
522 int fd = fdchanges [i]; 1529 int fd = fdchanges [i];
523 ANFD *anfd = anfds + fd; 1530 ANFD *anfd = anfds + fd;
524 ev_io *w; 1531 ev_io *w;
525 1532
526 int events = 0; 1533 unsigned char o_events = anfd->events;
1534 unsigned char o_reify = anfd->reify;
527 1535
528 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1536 anfd->reify = 0;
529 events |= w->events;
530 1537
531#if EV_SELECT_IS_WINSOCKET 1538 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
532 if (events)
533 { 1539 {
534 unsigned long argp; 1540 anfd->events = 0;
535 anfd->handle = _get_osfhandle (fd); 1541
536 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1542 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1543 anfd->events |= (unsigned char)w->events;
1544
1545 if (o_events != anfd->events)
1546 o_reify = EV__IOFDSET; /* actually |= */
537 } 1547 }
538#endif
539 1548
540 anfd->reify = 0; 1549 if (o_reify & EV__IOFDSET)
541
542 backend_modify (EV_A_ fd, anfd->events, events); 1550 backend_modify (EV_A_ fd, o_events, anfd->events);
543 anfd->events = events;
544 } 1551 }
545 1552
546 fdchangecnt = 0; 1553 fdchangecnt = 0;
547} 1554}
548 1555
549void inline_size 1556/* something about the given fd changed */
1557inline_size void
550fd_change (EV_P_ int fd) 1558fd_change (EV_P_ int fd, int flags)
551{ 1559{
552 if (expect_false (anfds [fd].reify)) 1560 unsigned char reify = anfds [fd].reify;
553 return;
554
555 anfds [fd].reify = 1; 1561 anfds [fd].reify |= flags;
556 1562
1563 if (expect_true (!reify))
1564 {
557 ++fdchangecnt; 1565 ++fdchangecnt;
558 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1566 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
559 fdchanges [fdchangecnt - 1] = fd; 1567 fdchanges [fdchangecnt - 1] = fd;
1568 }
560} 1569}
561 1570
562void inline_speed 1571/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1572inline_speed void ecb_cold
563fd_kill (EV_P_ int fd) 1573fd_kill (EV_P_ int fd)
564{ 1574{
565 ev_io *w; 1575 ev_io *w;
566 1576
567 while ((w = (ev_io *)anfds [fd].head)) 1577 while ((w = (ev_io *)anfds [fd].head))
… …
569 ev_io_stop (EV_A_ w); 1579 ev_io_stop (EV_A_ w);
570 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1580 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
571 } 1581 }
572} 1582}
573 1583
574int inline_size 1584/* check whether the given fd is actually valid, for error recovery */
1585inline_size int ecb_cold
575fd_valid (int fd) 1586fd_valid (int fd)
576{ 1587{
577#ifdef _WIN32 1588#ifdef _WIN32
578 return _get_osfhandle (fd) != -1; 1589 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
579#else 1590#else
580 return fcntl (fd, F_GETFD) != -1; 1591 return fcntl (fd, F_GETFD) != -1;
581#endif 1592#endif
582} 1593}
583 1594
584/* called on EBADF to verify fds */ 1595/* called on EBADF to verify fds */
585static void noinline 1596static void noinline ecb_cold
586fd_ebadf (EV_P) 1597fd_ebadf (EV_P)
587{ 1598{
588 int fd; 1599 int fd;
589 1600
590 for (fd = 0; fd < anfdmax; ++fd) 1601 for (fd = 0; fd < anfdmax; ++fd)
591 if (anfds [fd].events) 1602 if (anfds [fd].events)
592 if (!fd_valid (fd) == -1 && errno == EBADF) 1603 if (!fd_valid (fd) && errno == EBADF)
593 fd_kill (EV_A_ fd); 1604 fd_kill (EV_A_ fd);
594} 1605}
595 1606
596/* called on ENOMEM in select/poll to kill some fds and retry */ 1607/* called on ENOMEM in select/poll to kill some fds and retry */
597static void noinline 1608static void noinline ecb_cold
598fd_enomem (EV_P) 1609fd_enomem (EV_P)
599{ 1610{
600 int fd; 1611 int fd;
601 1612
602 for (fd = anfdmax; fd--; ) 1613 for (fd = anfdmax; fd--; )
603 if (anfds [fd].events) 1614 if (anfds [fd].events)
604 { 1615 {
605 fd_kill (EV_A_ fd); 1616 fd_kill (EV_A_ fd);
606 return; 1617 break;
607 } 1618 }
608} 1619}
609 1620
610/* usually called after fork if backend needs to re-arm all fds from scratch */ 1621/* usually called after fork if backend needs to re-arm all fds from scratch */
611static void noinline 1622static void noinline
… …
615 1626
616 for (fd = 0; fd < anfdmax; ++fd) 1627 for (fd = 0; fd < anfdmax; ++fd)
617 if (anfds [fd].events) 1628 if (anfds [fd].events)
618 { 1629 {
619 anfds [fd].events = 0; 1630 anfds [fd].events = 0;
620 fd_change (EV_A_ fd); 1631 anfds [fd].emask = 0;
1632 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
621 } 1633 }
622} 1634}
623 1635
624/*****************************************************************************/ 1636/* used to prepare libev internal fd's */
625 1637/* this is not fork-safe */
626void inline_speed 1638inline_speed void
627upheap (WT *heap, int k)
628{
629 WT w = heap [k];
630
631 while (k && heap [k >> 1]->at > w->at)
632 {
633 heap [k] = heap [k >> 1];
634 ((W)heap [k])->active = k + 1;
635 k >>= 1;
636 }
637
638 heap [k] = w;
639 ((W)heap [k])->active = k + 1;
640
641}
642
643void inline_speed
644downheap (WT *heap, int N, int k)
645{
646 WT w = heap [k];
647
648 while (k < (N >> 1))
649 {
650 int j = k << 1;
651
652 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
653 ++j;
654
655 if (w->at <= heap [j]->at)
656 break;
657
658 heap [k] = heap [j];
659 ((W)heap [k])->active = k + 1;
660 k = j;
661 }
662
663 heap [k] = w;
664 ((W)heap [k])->active = k + 1;
665}
666
667void inline_size
668adjustheap (WT *heap, int N, int k)
669{
670 upheap (heap, k);
671 downheap (heap, N, k);
672}
673
674/*****************************************************************************/
675
676typedef struct
677{
678 WL head;
679 sig_atomic_t volatile gotsig;
680} ANSIG;
681
682static ANSIG *signals;
683static int signalmax;
684
685static int sigpipe [2];
686static sig_atomic_t volatile gotsig;
687static ev_io sigev;
688
689void inline_size
690signals_init (ANSIG *base, int count)
691{
692 while (count--)
693 {
694 base->head = 0;
695 base->gotsig = 0;
696
697 ++base;
698 }
699}
700
701static void
702sighandler (int signum)
703{
704#if _WIN32
705 signal (signum, sighandler);
706#endif
707
708 signals [signum - 1].gotsig = 1;
709
710 if (!gotsig)
711 {
712 int old_errno = errno;
713 gotsig = 1;
714 write (sigpipe [1], &signum, 1);
715 errno = old_errno;
716 }
717}
718
719void noinline
720ev_feed_signal_event (EV_P_ int signum)
721{
722 WL w;
723
724#if EV_MULTIPLICITY
725 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
726#endif
727
728 --signum;
729
730 if (signum < 0 || signum >= signalmax)
731 return;
732
733 signals [signum].gotsig = 0;
734
735 for (w = signals [signum].head; w; w = w->next)
736 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
737}
738
739static void
740sigcb (EV_P_ ev_io *iow, int revents)
741{
742 int signum;
743
744 read (sigpipe [0], &revents, 1);
745 gotsig = 0;
746
747 for (signum = signalmax; signum--; )
748 if (signals [signum].gotsig)
749 ev_feed_signal_event (EV_A_ signum + 1);
750}
751
752void inline_size
753fd_intern (int fd) 1639fd_intern (int fd)
754{ 1640{
755#ifdef _WIN32 1641#ifdef _WIN32
756 int arg = 1; 1642 unsigned long arg = 1;
757 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1643 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
758#else 1644#else
759 fcntl (fd, F_SETFD, FD_CLOEXEC); 1645 fcntl (fd, F_SETFD, FD_CLOEXEC);
760 fcntl (fd, F_SETFL, O_NONBLOCK); 1646 fcntl (fd, F_SETFL, O_NONBLOCK);
761#endif 1647#endif
762} 1648}
763 1649
764static void noinline
765siginit (EV_P)
766{
767 fd_intern (sigpipe [0]);
768 fd_intern (sigpipe [1]);
769
770 ev_io_set (&sigev, sigpipe [0], EV_READ);
771 ev_io_start (EV_A_ &sigev);
772 ev_unref (EV_A); /* child watcher should not keep loop alive */
773}
774
775/*****************************************************************************/ 1650/*****************************************************************************/
776 1651
777static ev_child *childs [EV_PID_HASHSIZE]; 1652/*
1653 * the heap functions want a real array index. array index 0 is guaranteed to not
1654 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1655 * the branching factor of the d-tree.
1656 */
778 1657
1658/*
1659 * at the moment we allow libev the luxury of two heaps,
1660 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1661 * which is more cache-efficient.
1662 * the difference is about 5% with 50000+ watchers.
1663 */
1664#if EV_USE_4HEAP
1665
1666#define DHEAP 4
1667#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1668#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1669#define UPHEAP_DONE(p,k) ((p) == (k))
1670
1671/* away from the root */
1672inline_speed void
1673downheap (ANHE *heap, int N, int k)
1674{
1675 ANHE he = heap [k];
1676 ANHE *E = heap + N + HEAP0;
1677
1678 for (;;)
1679 {
1680 ev_tstamp minat;
1681 ANHE *minpos;
1682 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1683
1684 /* find minimum child */
1685 if (expect_true (pos + DHEAP - 1 < E))
1686 {
1687 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1688 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1689 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1690 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1691 }
1692 else if (pos < E)
1693 {
1694 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1695 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1696 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1697 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1698 }
1699 else
1700 break;
1701
1702 if (ANHE_at (he) <= minat)
1703 break;
1704
1705 heap [k] = *minpos;
1706 ev_active (ANHE_w (*minpos)) = k;
1707
1708 k = minpos - heap;
1709 }
1710
1711 heap [k] = he;
1712 ev_active (ANHE_w (he)) = k;
1713}
1714
1715#else /* 4HEAP */
1716
1717#define HEAP0 1
1718#define HPARENT(k) ((k) >> 1)
1719#define UPHEAP_DONE(p,k) (!(p))
1720
1721/* away from the root */
1722inline_speed void
1723downheap (ANHE *heap, int N, int k)
1724{
1725 ANHE he = heap [k];
1726
1727 for (;;)
1728 {
1729 int c = k << 1;
1730
1731 if (c >= N + HEAP0)
1732 break;
1733
1734 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1735 ? 1 : 0;
1736
1737 if (ANHE_at (he) <= ANHE_at (heap [c]))
1738 break;
1739
1740 heap [k] = heap [c];
1741 ev_active (ANHE_w (heap [k])) = k;
1742
1743 k = c;
1744 }
1745
1746 heap [k] = he;
1747 ev_active (ANHE_w (he)) = k;
1748}
1749#endif
1750
1751/* towards the root */
1752inline_speed void
1753upheap (ANHE *heap, int k)
1754{
1755 ANHE he = heap [k];
1756
1757 for (;;)
1758 {
1759 int p = HPARENT (k);
1760
1761 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1762 break;
1763
1764 heap [k] = heap [p];
1765 ev_active (ANHE_w (heap [k])) = k;
1766 k = p;
1767 }
1768
1769 heap [k] = he;
1770 ev_active (ANHE_w (he)) = k;
1771}
1772
1773/* move an element suitably so it is in a correct place */
1774inline_size void
1775adjustheap (ANHE *heap, int N, int k)
1776{
1777 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1778 upheap (heap, k);
1779 else
1780 downheap (heap, N, k);
1781}
1782
1783/* rebuild the heap: this function is used only once and executed rarely */
1784inline_size void
1785reheap (ANHE *heap, int N)
1786{
1787 int i;
1788
1789 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1790 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1791 for (i = 0; i < N; ++i)
1792 upheap (heap, i + HEAP0);
1793}
1794
1795/*****************************************************************************/
1796
1797/* associate signal watchers to a signal signal */
1798typedef struct
1799{
1800 EV_ATOMIC_T pending;
1801#if EV_MULTIPLICITY
1802 EV_P;
1803#endif
1804 WL head;
1805} ANSIG;
1806
1807static ANSIG signals [EV_NSIG - 1];
1808
1809/*****************************************************************************/
1810
1811#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1812
1813static void noinline ecb_cold
1814evpipe_init (EV_P)
1815{
1816 if (!ev_is_active (&pipe_w))
1817 {
1818# if EV_USE_EVENTFD
1819 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1820 if (evfd < 0 && errno == EINVAL)
1821 evfd = eventfd (0, 0);
1822
1823 if (evfd >= 0)
1824 {
1825 evpipe [0] = -1;
1826 fd_intern (evfd); /* doing it twice doesn't hurt */
1827 ev_io_set (&pipe_w, evfd, EV_READ);
1828 }
1829 else
1830# endif
1831 {
1832 while (pipe (evpipe))
1833 ev_syserr ("(libev) error creating signal/async pipe");
1834
1835 fd_intern (evpipe [0]);
1836 fd_intern (evpipe [1]);
1837 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1838 }
1839
1840 ev_io_start (EV_A_ &pipe_w);
1841 ev_unref (EV_A); /* watcher should not keep loop alive */
1842 }
1843}
1844
1845inline_speed void
1846evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1847{
1848 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1849
1850 if (expect_true (*flag))
1851 return;
1852
1853 *flag = 1;
1854
1855 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1856
1857 pipe_write_skipped = 1;
1858
1859 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1860
1861 if (pipe_write_wanted)
1862 {
1863 int old_errno;
1864
1865 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1866
1867 old_errno = errno; /* save errno because write will clobber it */
1868
1869#if EV_USE_EVENTFD
1870 if (evfd >= 0)
1871 {
1872 uint64_t counter = 1;
1873 write (evfd, &counter, sizeof (uint64_t));
1874 }
1875 else
1876#endif
1877 {
779#ifndef _WIN32 1878#ifdef _WIN32
1879 WSABUF buf;
1880 DWORD sent;
1881 buf.buf = &buf;
1882 buf.len = 1;
1883 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1884#else
1885 write (evpipe [1], &(evpipe [1]), 1);
1886#endif
1887 }
1888
1889 errno = old_errno;
1890 }
1891}
1892
1893/* called whenever the libev signal pipe */
1894/* got some events (signal, async) */
1895static void
1896pipecb (EV_P_ ev_io *iow, int revents)
1897{
1898 int i;
1899
1900 if (revents & EV_READ)
1901 {
1902#if EV_USE_EVENTFD
1903 if (evfd >= 0)
1904 {
1905 uint64_t counter;
1906 read (evfd, &counter, sizeof (uint64_t));
1907 }
1908 else
1909#endif
1910 {
1911 char dummy[4];
1912#ifdef _WIN32
1913 WSABUF buf;
1914 DWORD recvd;
1915 DWORD flags = 0;
1916 buf.buf = dummy;
1917 buf.len = sizeof (dummy);
1918 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
1919#else
1920 read (evpipe [0], &dummy, sizeof (dummy));
1921#endif
1922 }
1923 }
1924
1925 pipe_write_skipped = 0;
1926
1927 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1928
1929#if EV_SIGNAL_ENABLE
1930 if (sig_pending)
1931 {
1932 sig_pending = 0;
1933
1934 ECB_MEMORY_FENCE_RELEASE;
1935
1936 for (i = EV_NSIG - 1; i--; )
1937 if (expect_false (signals [i].pending))
1938 ev_feed_signal_event (EV_A_ i + 1);
1939 }
1940#endif
1941
1942#if EV_ASYNC_ENABLE
1943 if (async_pending)
1944 {
1945 async_pending = 0;
1946
1947 ECB_MEMORY_FENCE_RELEASE;
1948
1949 for (i = asynccnt; i--; )
1950 if (asyncs [i]->sent)
1951 {
1952 asyncs [i]->sent = 0;
1953 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1954 }
1955 }
1956#endif
1957}
1958
1959/*****************************************************************************/
1960
1961void
1962ev_feed_signal (int signum) EV_THROW
1963{
1964#if EV_MULTIPLICITY
1965 EV_P = signals [signum - 1].loop;
1966
1967 if (!EV_A)
1968 return;
1969#endif
1970
1971 if (!ev_active (&pipe_w))
1972 return;
1973
1974 signals [signum - 1].pending = 1;
1975 evpipe_write (EV_A_ &sig_pending);
1976}
1977
1978static void
1979ev_sighandler (int signum)
1980{
1981#ifdef _WIN32
1982 signal (signum, ev_sighandler);
1983#endif
1984
1985 ev_feed_signal (signum);
1986}
1987
1988void noinline
1989ev_feed_signal_event (EV_P_ int signum) EV_THROW
1990{
1991 WL w;
1992
1993 if (expect_false (signum <= 0 || signum > EV_NSIG))
1994 return;
1995
1996 --signum;
1997
1998#if EV_MULTIPLICITY
1999 /* it is permissible to try to feed a signal to the wrong loop */
2000 /* or, likely more useful, feeding a signal nobody is waiting for */
2001
2002 if (expect_false (signals [signum].loop != EV_A))
2003 return;
2004#endif
2005
2006 signals [signum].pending = 0;
2007
2008 for (w = signals [signum].head; w; w = w->next)
2009 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2010}
2011
2012#if EV_USE_SIGNALFD
2013static void
2014sigfdcb (EV_P_ ev_io *iow, int revents)
2015{
2016 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2017
2018 for (;;)
2019 {
2020 ssize_t res = read (sigfd, si, sizeof (si));
2021
2022 /* not ISO-C, as res might be -1, but works with SuS */
2023 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2024 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2025
2026 if (res < (ssize_t)sizeof (si))
2027 break;
2028 }
2029}
2030#endif
2031
2032#endif
2033
2034/*****************************************************************************/
2035
2036#if EV_CHILD_ENABLE
2037static WL childs [EV_PID_HASHSIZE];
780 2038
781static ev_signal childev; 2039static ev_signal childev;
782 2040
783void inline_speed 2041#ifndef WIFCONTINUED
2042# define WIFCONTINUED(status) 0
2043#endif
2044
2045/* handle a single child status event */
2046inline_speed void
784child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2047child_reap (EV_P_ int chain, int pid, int status)
785{ 2048{
786 ev_child *w; 2049 ev_child *w;
2050 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
787 2051
788 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2052 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2053 {
789 if (w->pid == pid || !w->pid) 2054 if ((w->pid == pid || !w->pid)
2055 && (!traced || (w->flags & 1)))
790 { 2056 {
791 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2057 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
792 w->rpid = pid; 2058 w->rpid = pid;
793 w->rstatus = status; 2059 w->rstatus = status;
794 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2060 ev_feed_event (EV_A_ (W)w, EV_CHILD);
795 } 2061 }
2062 }
796} 2063}
797 2064
798#ifndef WCONTINUED 2065#ifndef WCONTINUED
799# define WCONTINUED 0 2066# define WCONTINUED 0
800#endif 2067#endif
801 2068
2069/* called on sigchld etc., calls waitpid */
802static void 2070static void
803childcb (EV_P_ ev_signal *sw, int revents) 2071childcb (EV_P_ ev_signal *sw, int revents)
804{ 2072{
805 int pid, status; 2073 int pid, status;
806 2074
… …
809 if (!WCONTINUED 2077 if (!WCONTINUED
810 || errno != EINVAL 2078 || errno != EINVAL
811 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2079 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
812 return; 2080 return;
813 2081
814 /* make sure we are called again until all childs have been reaped */ 2082 /* make sure we are called again until all children have been reaped */
815 /* we need to do it this way so that the callback gets called before we continue */ 2083 /* we need to do it this way so that the callback gets called before we continue */
816 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2084 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
817 2085
818 child_reap (EV_A_ sw, pid, pid, status); 2086 child_reap (EV_A_ pid, pid, status);
819 if (EV_PID_HASHSIZE > 1) 2087 if ((EV_PID_HASHSIZE) > 1)
820 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2088 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
821} 2089}
822 2090
823#endif 2091#endif
824 2092
825/*****************************************************************************/ 2093/*****************************************************************************/
826 2094
2095#if EV_USE_IOCP
2096# include "ev_iocp.c"
2097#endif
827#if EV_USE_PORT 2098#if EV_USE_PORT
828# include "ev_port.c" 2099# include "ev_port.c"
829#endif 2100#endif
830#if EV_USE_KQUEUE 2101#if EV_USE_KQUEUE
831# include "ev_kqueue.c" 2102# include "ev_kqueue.c"
… …
838#endif 2109#endif
839#if EV_USE_SELECT 2110#if EV_USE_SELECT
840# include "ev_select.c" 2111# include "ev_select.c"
841#endif 2112#endif
842 2113
843int 2114int ecb_cold
844ev_version_major (void) 2115ev_version_major (void) EV_THROW
845{ 2116{
846 return EV_VERSION_MAJOR; 2117 return EV_VERSION_MAJOR;
847} 2118}
848 2119
849int 2120int ecb_cold
850ev_version_minor (void) 2121ev_version_minor (void) EV_THROW
851{ 2122{
852 return EV_VERSION_MINOR; 2123 return EV_VERSION_MINOR;
853} 2124}
854 2125
855/* return true if we are running with elevated privileges and should ignore env variables */ 2126/* return true if we are running with elevated privileges and should ignore env variables */
856int inline_size 2127int inline_size ecb_cold
857enable_secure (void) 2128enable_secure (void)
858{ 2129{
859#ifdef _WIN32 2130#ifdef _WIN32
860 return 0; 2131 return 0;
861#else 2132#else
862 return getuid () != geteuid () 2133 return getuid () != geteuid ()
863 || getgid () != getegid (); 2134 || getgid () != getegid ();
864#endif 2135#endif
865} 2136}
866 2137
867unsigned int 2138unsigned int ecb_cold
868ev_supported_backends (void) 2139ev_supported_backends (void) EV_THROW
869{ 2140{
870 unsigned int flags = 0; 2141 unsigned int flags = 0;
871 2142
872 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2143 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
873 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2144 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
876 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2147 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
877 2148
878 return flags; 2149 return flags;
879} 2150}
880 2151
881unsigned int 2152unsigned int ecb_cold
882ev_recommended_backends (void) 2153ev_recommended_backends (void) EV_THROW
883{ 2154{
884 unsigned int flags = ev_supported_backends (); 2155 unsigned int flags = ev_supported_backends ();
885 2156
886#ifndef __NetBSD__ 2157#ifndef __NetBSD__
887 /* kqueue is borked on everything but netbsd apparently */ 2158 /* kqueue is borked on everything but netbsd apparently */
888 /* it usually doesn't work correctly on anything but sockets and pipes */ 2159 /* it usually doesn't work correctly on anything but sockets and pipes */
889 flags &= ~EVBACKEND_KQUEUE; 2160 flags &= ~EVBACKEND_KQUEUE;
890#endif 2161#endif
891#ifdef __APPLE__ 2162#ifdef __APPLE__
892 // flags &= ~EVBACKEND_KQUEUE; for documentation 2163 /* only select works correctly on that "unix-certified" platform */
893 flags &= ~EVBACKEND_POLL; 2164 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2165 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2166#endif
2167#ifdef __FreeBSD__
2168 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
894#endif 2169#endif
895 2170
896 return flags; 2171 return flags;
897} 2172}
898 2173
2174unsigned int ecb_cold
2175ev_embeddable_backends (void) EV_THROW
2176{
2177 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2178
2179 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2180 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2181 flags &= ~EVBACKEND_EPOLL;
2182
2183 return flags;
2184}
2185
899unsigned int 2186unsigned int
900ev_embeddable_backends (void) 2187ev_backend (EV_P) EV_THROW
901{ 2188{
902 return EVBACKEND_EPOLL 2189 return backend;
903 | EVBACKEND_KQUEUE
904 | EVBACKEND_PORT;
905} 2190}
906 2191
2192#if EV_FEATURE_API
907unsigned int 2193unsigned int
908ev_backend (EV_P) 2194ev_iteration (EV_P) EV_THROW
909{ 2195{
910 return backend; 2196 return loop_count;
911} 2197}
912 2198
913unsigned int 2199unsigned int
914ev_loop_count (EV_P) 2200ev_depth (EV_P) EV_THROW
915{ 2201{
916 return loop_count; 2202 return loop_depth;
917} 2203}
918 2204
2205void
2206ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2207{
2208 io_blocktime = interval;
2209}
2210
2211void
2212ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2213{
2214 timeout_blocktime = interval;
2215}
2216
2217void
2218ev_set_userdata (EV_P_ void *data) EV_THROW
2219{
2220 userdata = data;
2221}
2222
2223void *
2224ev_userdata (EV_P) EV_THROW
2225{
2226 return userdata;
2227}
2228
2229void
2230ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2231{
2232 invoke_cb = invoke_pending_cb;
2233}
2234
2235void
2236ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2237{
2238 release_cb = release;
2239 acquire_cb = acquire;
2240}
2241#endif
2242
2243/* initialise a loop structure, must be zero-initialised */
919static void noinline 2244static void noinline ecb_cold
920loop_init (EV_P_ unsigned int flags) 2245loop_init (EV_P_ unsigned int flags) EV_THROW
921{ 2246{
922 if (!backend) 2247 if (!backend)
923 { 2248 {
2249 origflags = flags;
2250
2251#if EV_USE_REALTIME
2252 if (!have_realtime)
2253 {
2254 struct timespec ts;
2255
2256 if (!clock_gettime (CLOCK_REALTIME, &ts))
2257 have_realtime = 1;
2258 }
2259#endif
2260
924#if EV_USE_MONOTONIC 2261#if EV_USE_MONOTONIC
2262 if (!have_monotonic)
925 { 2263 {
926 struct timespec ts; 2264 struct timespec ts;
2265
927 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2266 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
928 have_monotonic = 1; 2267 have_monotonic = 1;
929 } 2268 }
930#endif 2269#endif
931
932 ev_rt_now = ev_time ();
933 mn_now = get_clock ();
934 now_floor = mn_now;
935 rtmn_diff = ev_rt_now - mn_now;
936 2270
937 /* pid check not overridable via env */ 2271 /* pid check not overridable via env */
938#ifndef _WIN32 2272#ifndef _WIN32
939 if (flags & EVFLAG_FORKCHECK) 2273 if (flags & EVFLAG_FORKCHECK)
940 curpid = getpid (); 2274 curpid = getpid ();
… …
943 if (!(flags & EVFLAG_NOENV) 2277 if (!(flags & EVFLAG_NOENV)
944 && !enable_secure () 2278 && !enable_secure ()
945 && getenv ("LIBEV_FLAGS")) 2279 && getenv ("LIBEV_FLAGS"))
946 flags = atoi (getenv ("LIBEV_FLAGS")); 2280 flags = atoi (getenv ("LIBEV_FLAGS"));
947 2281
948 if (!(flags & 0x0000ffffUL)) 2282 ev_rt_now = ev_time ();
2283 mn_now = get_clock ();
2284 now_floor = mn_now;
2285 rtmn_diff = ev_rt_now - mn_now;
2286#if EV_FEATURE_API
2287 invoke_cb = ev_invoke_pending;
2288#endif
2289
2290 io_blocktime = 0.;
2291 timeout_blocktime = 0.;
2292 backend = 0;
2293 backend_fd = -1;
2294 sig_pending = 0;
2295#if EV_ASYNC_ENABLE
2296 async_pending = 0;
2297#endif
2298 pipe_write_skipped = 0;
2299 pipe_write_wanted = 0;
2300#if EV_USE_INOTIFY
2301 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2302#endif
2303#if EV_USE_SIGNALFD
2304 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2305#endif
2306
2307 if (!(flags & EVBACKEND_MASK))
949 flags |= ev_recommended_backends (); 2308 flags |= ev_recommended_backends ();
950 2309
951 backend = 0;
952 backend_fd = -1;
953#if EV_USE_INOTIFY 2310#if EV_USE_IOCP
954 fs_fd = -2; 2311 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
955#endif 2312#endif
956
957#if EV_USE_PORT 2313#if EV_USE_PORT
958 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2314 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
959#endif 2315#endif
960#if EV_USE_KQUEUE 2316#if EV_USE_KQUEUE
961 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2317 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
968#endif 2324#endif
969#if EV_USE_SELECT 2325#if EV_USE_SELECT
970 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2326 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
971#endif 2327#endif
972 2328
2329 ev_prepare_init (&pending_w, pendingcb);
2330
2331#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
973 ev_init (&sigev, sigcb); 2332 ev_init (&pipe_w, pipecb);
974 ev_set_priority (&sigev, EV_MAXPRI); 2333 ev_set_priority (&pipe_w, EV_MAXPRI);
2334#endif
975 } 2335 }
976} 2336}
977 2337
978static void noinline 2338/* free up a loop structure */
2339void ecb_cold
979loop_destroy (EV_P) 2340ev_loop_destroy (EV_P)
980{ 2341{
981 int i; 2342 int i;
2343
2344#if EV_MULTIPLICITY
2345 /* mimic free (0) */
2346 if (!EV_A)
2347 return;
2348#endif
2349
2350#if EV_CLEANUP_ENABLE
2351 /* queue cleanup watchers (and execute them) */
2352 if (expect_false (cleanupcnt))
2353 {
2354 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2355 EV_INVOKE_PENDING;
2356 }
2357#endif
2358
2359#if EV_CHILD_ENABLE
2360 if (ev_is_active (&childev))
2361 {
2362 ev_ref (EV_A); /* child watcher */
2363 ev_signal_stop (EV_A_ &childev);
2364 }
2365#endif
2366
2367 if (ev_is_active (&pipe_w))
2368 {
2369 /*ev_ref (EV_A);*/
2370 /*ev_io_stop (EV_A_ &pipe_w);*/
2371
2372#if EV_USE_EVENTFD
2373 if (evfd >= 0)
2374 close (evfd);
2375#endif
2376
2377 if (evpipe [0] >= 0)
2378 {
2379 EV_WIN32_CLOSE_FD (evpipe [0]);
2380 EV_WIN32_CLOSE_FD (evpipe [1]);
2381 }
2382 }
2383
2384#if EV_USE_SIGNALFD
2385 if (ev_is_active (&sigfd_w))
2386 close (sigfd);
2387#endif
982 2388
983#if EV_USE_INOTIFY 2389#if EV_USE_INOTIFY
984 if (fs_fd >= 0) 2390 if (fs_fd >= 0)
985 close (fs_fd); 2391 close (fs_fd);
986#endif 2392#endif
987 2393
988 if (backend_fd >= 0) 2394 if (backend_fd >= 0)
989 close (backend_fd); 2395 close (backend_fd);
990 2396
2397#if EV_USE_IOCP
2398 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2399#endif
991#if EV_USE_PORT 2400#if EV_USE_PORT
992 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2401 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
993#endif 2402#endif
994#if EV_USE_KQUEUE 2403#if EV_USE_KQUEUE
995 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2404 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1010#if EV_IDLE_ENABLE 2419#if EV_IDLE_ENABLE
1011 array_free (idle, [i]); 2420 array_free (idle, [i]);
1012#endif 2421#endif
1013 } 2422 }
1014 2423
2424 ev_free (anfds); anfds = 0; anfdmax = 0;
2425
1015 /* have to use the microsoft-never-gets-it-right macro */ 2426 /* have to use the microsoft-never-gets-it-right macro */
2427 array_free (rfeed, EMPTY);
1016 array_free (fdchange, EMPTY); 2428 array_free (fdchange, EMPTY);
1017 array_free (timer, EMPTY); 2429 array_free (timer, EMPTY);
1018#if EV_PERIODIC_ENABLE 2430#if EV_PERIODIC_ENABLE
1019 array_free (periodic, EMPTY); 2431 array_free (periodic, EMPTY);
1020#endif 2432#endif
2433#if EV_FORK_ENABLE
2434 array_free (fork, EMPTY);
2435#endif
2436#if EV_CLEANUP_ENABLE
2437 array_free (cleanup, EMPTY);
2438#endif
1021 array_free (prepare, EMPTY); 2439 array_free (prepare, EMPTY);
1022 array_free (check, EMPTY); 2440 array_free (check, EMPTY);
2441#if EV_ASYNC_ENABLE
2442 array_free (async, EMPTY);
2443#endif
1023 2444
1024 backend = 0; 2445 backend = 0;
1025}
1026 2446
2447#if EV_MULTIPLICITY
2448 if (ev_is_default_loop (EV_A))
2449#endif
2450 ev_default_loop_ptr = 0;
2451#if EV_MULTIPLICITY
2452 else
2453 ev_free (EV_A);
2454#endif
2455}
2456
2457#if EV_USE_INOTIFY
1027void inline_size infy_fork (EV_P); 2458inline_size void infy_fork (EV_P);
2459#endif
1028 2460
1029void inline_size 2461inline_size void
1030loop_fork (EV_P) 2462loop_fork (EV_P)
1031{ 2463{
1032#if EV_USE_PORT 2464#if EV_USE_PORT
1033 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2465 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1034#endif 2466#endif
… …
1040#endif 2472#endif
1041#if EV_USE_INOTIFY 2473#if EV_USE_INOTIFY
1042 infy_fork (EV_A); 2474 infy_fork (EV_A);
1043#endif 2475#endif
1044 2476
1045 if (ev_is_active (&sigev)) 2477 if (ev_is_active (&pipe_w))
1046 { 2478 {
1047 /* default loop */ 2479 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1048 2480
1049 ev_ref (EV_A); 2481 ev_ref (EV_A);
1050 ev_io_stop (EV_A_ &sigev); 2482 ev_io_stop (EV_A_ &pipe_w);
1051 close (sigpipe [0]);
1052 close (sigpipe [1]);
1053 2483
1054 while (pipe (sigpipe)) 2484#if EV_USE_EVENTFD
1055 syserr ("(libev) error creating pipe"); 2485 if (evfd >= 0)
2486 close (evfd);
2487#endif
1056 2488
2489 if (evpipe [0] >= 0)
2490 {
2491 EV_WIN32_CLOSE_FD (evpipe [0]);
2492 EV_WIN32_CLOSE_FD (evpipe [1]);
2493 }
2494
2495#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1057 siginit (EV_A); 2496 evpipe_init (EV_A);
2497 /* now iterate over everything, in case we missed something */
2498 pipecb (EV_A_ &pipe_w, EV_READ);
2499#endif
1058 } 2500 }
1059 2501
1060 postfork = 0; 2502 postfork = 0;
1061} 2503}
1062 2504
1063#if EV_MULTIPLICITY 2505#if EV_MULTIPLICITY
2506
1064struct ev_loop * 2507struct ev_loop * ecb_cold
1065ev_loop_new (unsigned int flags) 2508ev_loop_new (unsigned int flags) EV_THROW
1066{ 2509{
1067 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2510 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1068 2511
1069 memset (loop, 0, sizeof (struct ev_loop)); 2512 memset (EV_A, 0, sizeof (struct ev_loop));
1070
1071 loop_init (EV_A_ flags); 2513 loop_init (EV_A_ flags);
1072 2514
1073 if (ev_backend (EV_A)) 2515 if (ev_backend (EV_A))
1074 return loop; 2516 return EV_A;
1075 2517
2518 ev_free (EV_A);
1076 return 0; 2519 return 0;
1077} 2520}
1078 2521
1079void 2522#endif /* multiplicity */
1080ev_loop_destroy (EV_P)
1081{
1082 loop_destroy (EV_A);
1083 ev_free (loop);
1084}
1085 2523
1086void 2524#if EV_VERIFY
1087ev_loop_fork (EV_P) 2525static void noinline ecb_cold
2526verify_watcher (EV_P_ W w)
1088{ 2527{
1089 postfork = 1; 2528 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1090}
1091 2529
2530 if (w->pending)
2531 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2532}
2533
2534static void noinline ecb_cold
2535verify_heap (EV_P_ ANHE *heap, int N)
2536{
2537 int i;
2538
2539 for (i = HEAP0; i < N + HEAP0; ++i)
2540 {
2541 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2542 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2543 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2544
2545 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2546 }
2547}
2548
2549static void noinline ecb_cold
2550array_verify (EV_P_ W *ws, int cnt)
2551{
2552 while (cnt--)
2553 {
2554 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2555 verify_watcher (EV_A_ ws [cnt]);
2556 }
2557}
2558#endif
2559
2560#if EV_FEATURE_API
2561void ecb_cold
2562ev_verify (EV_P) EV_THROW
2563{
2564#if EV_VERIFY
2565 int i;
2566 WL w, w2;
2567
2568 assert (activecnt >= -1);
2569
2570 assert (fdchangemax >= fdchangecnt);
2571 for (i = 0; i < fdchangecnt; ++i)
2572 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2573
2574 assert (anfdmax >= 0);
2575 for (i = 0; i < anfdmax; ++i)
2576 {
2577 int j = 0;
2578
2579 for (w = w2 = anfds [i].head; w; w = w->next)
2580 {
2581 verify_watcher (EV_A_ (W)w);
2582
2583 if (j++ & 1)
2584 {
2585 assert (("libev: io watcher list contains a loop", w != w2));
2586 w2 = w2->next;
2587 }
2588
2589 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2590 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2591 }
2592 }
2593
2594 assert (timermax >= timercnt);
2595 verify_heap (EV_A_ timers, timercnt);
2596
2597#if EV_PERIODIC_ENABLE
2598 assert (periodicmax >= periodiccnt);
2599 verify_heap (EV_A_ periodics, periodiccnt);
2600#endif
2601
2602 for (i = NUMPRI; i--; )
2603 {
2604 assert (pendingmax [i] >= pendingcnt [i]);
2605#if EV_IDLE_ENABLE
2606 assert (idleall >= 0);
2607 assert (idlemax [i] >= idlecnt [i]);
2608 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2609#endif
2610 }
2611
2612#if EV_FORK_ENABLE
2613 assert (forkmax >= forkcnt);
2614 array_verify (EV_A_ (W *)forks, forkcnt);
2615#endif
2616
2617#if EV_CLEANUP_ENABLE
2618 assert (cleanupmax >= cleanupcnt);
2619 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2620#endif
2621
2622#if EV_ASYNC_ENABLE
2623 assert (asyncmax >= asynccnt);
2624 array_verify (EV_A_ (W *)asyncs, asynccnt);
2625#endif
2626
2627#if EV_PREPARE_ENABLE
2628 assert (preparemax >= preparecnt);
2629 array_verify (EV_A_ (W *)prepares, preparecnt);
2630#endif
2631
2632#if EV_CHECK_ENABLE
2633 assert (checkmax >= checkcnt);
2634 array_verify (EV_A_ (W *)checks, checkcnt);
2635#endif
2636
2637# if 0
2638#if EV_CHILD_ENABLE
2639 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2640 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2641#endif
2642# endif
2643#endif
2644}
1092#endif 2645#endif
1093 2646
1094#if EV_MULTIPLICITY 2647#if EV_MULTIPLICITY
1095struct ev_loop * 2648struct ev_loop * ecb_cold
1096ev_default_loop_init (unsigned int flags)
1097#else 2649#else
1098int 2650int
2651#endif
1099ev_default_loop (unsigned int flags) 2652ev_default_loop (unsigned int flags) EV_THROW
1100#endif
1101{ 2653{
1102 if (sigpipe [0] == sigpipe [1])
1103 if (pipe (sigpipe))
1104 return 0;
1105
1106 if (!ev_default_loop_ptr) 2654 if (!ev_default_loop_ptr)
1107 { 2655 {
1108#if EV_MULTIPLICITY 2656#if EV_MULTIPLICITY
1109 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2657 EV_P = ev_default_loop_ptr = &default_loop_struct;
1110#else 2658#else
1111 ev_default_loop_ptr = 1; 2659 ev_default_loop_ptr = 1;
1112#endif 2660#endif
1113 2661
1114 loop_init (EV_A_ flags); 2662 loop_init (EV_A_ flags);
1115 2663
1116 if (ev_backend (EV_A)) 2664 if (ev_backend (EV_A))
1117 { 2665 {
1118 siginit (EV_A); 2666#if EV_CHILD_ENABLE
1119
1120#ifndef _WIN32
1121 ev_signal_init (&childev, childcb, SIGCHLD); 2667 ev_signal_init (&childev, childcb, SIGCHLD);
1122 ev_set_priority (&childev, EV_MAXPRI); 2668 ev_set_priority (&childev, EV_MAXPRI);
1123 ev_signal_start (EV_A_ &childev); 2669 ev_signal_start (EV_A_ &childev);
1124 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2670 ev_unref (EV_A); /* child watcher should not keep loop alive */
1125#endif 2671#endif
… …
1130 2676
1131 return ev_default_loop_ptr; 2677 return ev_default_loop_ptr;
1132} 2678}
1133 2679
1134void 2680void
1135ev_default_destroy (void) 2681ev_loop_fork (EV_P) EV_THROW
1136{ 2682{
1137#if EV_MULTIPLICITY 2683 postfork = 1; /* must be in line with ev_default_fork */
1138 struct ev_loop *loop = ev_default_loop_ptr;
1139#endif
1140
1141#ifndef _WIN32
1142 ev_ref (EV_A); /* child watcher */
1143 ev_signal_stop (EV_A_ &childev);
1144#endif
1145
1146 ev_ref (EV_A); /* signal watcher */
1147 ev_io_stop (EV_A_ &sigev);
1148
1149 close (sigpipe [0]); sigpipe [0] = 0;
1150 close (sigpipe [1]); sigpipe [1] = 0;
1151
1152 loop_destroy (EV_A);
1153} 2684}
2685
2686/*****************************************************************************/
1154 2687
1155void 2688void
1156ev_default_fork (void) 2689ev_invoke (EV_P_ void *w, int revents)
1157{ 2690{
1158#if EV_MULTIPLICITY 2691 EV_CB_INVOKE ((W)w, revents);
1159 struct ev_loop *loop = ev_default_loop_ptr;
1160#endif
1161
1162 if (backend)
1163 postfork = 1;
1164} 2692}
1165 2693
1166/*****************************************************************************/ 2694unsigned int
1167 2695ev_pending_count (EV_P) EV_THROW
1168void inline_speed
1169call_pending (EV_P)
1170{ 2696{
1171 int pri; 2697 int pri;
2698 unsigned int count = 0;
1172 2699
1173 for (pri = NUMPRI; pri--; ) 2700 for (pri = NUMPRI; pri--; )
2701 count += pendingcnt [pri];
2702
2703 return count;
2704}
2705
2706void noinline
2707ev_invoke_pending (EV_P)
2708{
2709 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
1174 while (pendingcnt [pri]) 2710 while (pendingcnt [pendingpri])
1175 { 2711 {
1176 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2712 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1177 2713
1178 if (expect_true (p->w))
1179 {
1180 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1181
1182 p->w->pending = 0; 2714 p->w->pending = 0;
1183 EV_CB_INVOKE (p->w, p->events); 2715 EV_CB_INVOKE (p->w, p->events);
1184 } 2716 EV_FREQUENT_CHECK;
1185 } 2717 }
1186} 2718}
1187 2719
1188void inline_size
1189timers_reify (EV_P)
1190{
1191 while (timercnt && ((WT)timers [0])->at <= mn_now)
1192 {
1193 ev_timer *w = timers [0];
1194
1195 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1196
1197 /* first reschedule or stop timer */
1198 if (w->repeat)
1199 {
1200 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1201
1202 ((WT)w)->at += w->repeat;
1203 if (((WT)w)->at < mn_now)
1204 ((WT)w)->at = mn_now;
1205
1206 downheap ((WT *)timers, timercnt, 0);
1207 }
1208 else
1209 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1210
1211 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1212 }
1213}
1214
1215#if EV_PERIODIC_ENABLE
1216void inline_size
1217periodics_reify (EV_P)
1218{
1219 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1220 {
1221 ev_periodic *w = periodics [0];
1222
1223 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1224
1225 /* first reschedule or stop timer */
1226 if (w->reschedule_cb)
1227 {
1228 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1229 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1230 downheap ((WT *)periodics, periodiccnt, 0);
1231 }
1232 else if (w->interval)
1233 {
1234 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1235 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1236 downheap ((WT *)periodics, periodiccnt, 0);
1237 }
1238 else
1239 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1240
1241 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1242 }
1243}
1244
1245static void noinline
1246periodics_reschedule (EV_P)
1247{
1248 int i;
1249
1250 /* adjust periodics after time jump */
1251 for (i = 0; i < periodiccnt; ++i)
1252 {
1253 ev_periodic *w = periodics [i];
1254
1255 if (w->reschedule_cb)
1256 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1257 else if (w->interval)
1258 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1259 }
1260
1261 /* now rebuild the heap */
1262 for (i = periodiccnt >> 1; i--; )
1263 downheap ((WT *)periodics, periodiccnt, i);
1264}
1265#endif
1266
1267#if EV_IDLE_ENABLE 2720#if EV_IDLE_ENABLE
1268void inline_size 2721/* make idle watchers pending. this handles the "call-idle */
2722/* only when higher priorities are idle" logic */
2723inline_size void
1269idle_reify (EV_P) 2724idle_reify (EV_P)
1270{ 2725{
1271 if (expect_false (idleall)) 2726 if (expect_false (idleall))
1272 { 2727 {
1273 int pri; 2728 int pri;
… …
1285 } 2740 }
1286 } 2741 }
1287} 2742}
1288#endif 2743#endif
1289 2744
1290int inline_size 2745/* make timers pending */
1291time_update_monotonic (EV_P) 2746inline_size void
2747timers_reify (EV_P)
1292{ 2748{
2749 EV_FREQUENT_CHECK;
2750
2751 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2752 {
2753 do
2754 {
2755 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2756
2757 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2758
2759 /* first reschedule or stop timer */
2760 if (w->repeat)
2761 {
2762 ev_at (w) += w->repeat;
2763 if (ev_at (w) < mn_now)
2764 ev_at (w) = mn_now;
2765
2766 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2767
2768 ANHE_at_cache (timers [HEAP0]);
2769 downheap (timers, timercnt, HEAP0);
2770 }
2771 else
2772 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2773
2774 EV_FREQUENT_CHECK;
2775 feed_reverse (EV_A_ (W)w);
2776 }
2777 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2778
2779 feed_reverse_done (EV_A_ EV_TIMER);
2780 }
2781}
2782
2783#if EV_PERIODIC_ENABLE
2784
2785static void noinline
2786periodic_recalc (EV_P_ ev_periodic *w)
2787{
2788 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2789 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2790
2791 /* the above almost always errs on the low side */
2792 while (at <= ev_rt_now)
2793 {
2794 ev_tstamp nat = at + w->interval;
2795
2796 /* when resolution fails us, we use ev_rt_now */
2797 if (expect_false (nat == at))
2798 {
2799 at = ev_rt_now;
2800 break;
2801 }
2802
2803 at = nat;
2804 }
2805
2806 ev_at (w) = at;
2807}
2808
2809/* make periodics pending */
2810inline_size void
2811periodics_reify (EV_P)
2812{
2813 EV_FREQUENT_CHECK;
2814
2815 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2816 {
2817 int feed_count = 0;
2818
2819 do
2820 {
2821 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2822
2823 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2824
2825 /* first reschedule or stop timer */
2826 if (w->reschedule_cb)
2827 {
2828 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2829
2830 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2831
2832 ANHE_at_cache (periodics [HEAP0]);
2833 downheap (periodics, periodiccnt, HEAP0);
2834 }
2835 else if (w->interval)
2836 {
2837 periodic_recalc (EV_A_ w);
2838 ANHE_at_cache (periodics [HEAP0]);
2839 downheap (periodics, periodiccnt, HEAP0);
2840 }
2841 else
2842 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2843
2844 EV_FREQUENT_CHECK;
2845 feed_reverse (EV_A_ (W)w);
2846 }
2847 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2848
2849 feed_reverse_done (EV_A_ EV_PERIODIC);
2850 }
2851}
2852
2853/* simply recalculate all periodics */
2854/* TODO: maybe ensure that at least one event happens when jumping forward? */
2855static void noinline ecb_cold
2856periodics_reschedule (EV_P)
2857{
2858 int i;
2859
2860 /* adjust periodics after time jump */
2861 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2862 {
2863 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2864
2865 if (w->reschedule_cb)
2866 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2867 else if (w->interval)
2868 periodic_recalc (EV_A_ w);
2869
2870 ANHE_at_cache (periodics [i]);
2871 }
2872
2873 reheap (periodics, periodiccnt);
2874}
2875#endif
2876
2877/* adjust all timers by a given offset */
2878static void noinline ecb_cold
2879timers_reschedule (EV_P_ ev_tstamp adjust)
2880{
2881 int i;
2882
2883 for (i = 0; i < timercnt; ++i)
2884 {
2885 ANHE *he = timers + i + HEAP0;
2886 ANHE_w (*he)->at += adjust;
2887 ANHE_at_cache (*he);
2888 }
2889}
2890
2891/* fetch new monotonic and realtime times from the kernel */
2892/* also detect if there was a timejump, and act accordingly */
2893inline_speed void
2894time_update (EV_P_ ev_tstamp max_block)
2895{
2896#if EV_USE_MONOTONIC
2897 if (expect_true (have_monotonic))
2898 {
2899 int i;
2900 ev_tstamp odiff = rtmn_diff;
2901
1293 mn_now = get_clock (); 2902 mn_now = get_clock ();
1294 2903
2904 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2905 /* interpolate in the meantime */
1295 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2906 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1296 { 2907 {
1297 ev_rt_now = rtmn_diff + mn_now; 2908 ev_rt_now = rtmn_diff + mn_now;
1298 return 0; 2909 return;
1299 } 2910 }
1300 else 2911
1301 {
1302 now_floor = mn_now; 2912 now_floor = mn_now;
1303 ev_rt_now = ev_time (); 2913 ev_rt_now = ev_time ();
1304 return 1;
1305 }
1306}
1307 2914
1308void inline_size 2915 /* loop a few times, before making important decisions.
1309time_update (EV_P) 2916 * on the choice of "4": one iteration isn't enough,
1310{ 2917 * in case we get preempted during the calls to
1311 int i; 2918 * ev_time and get_clock. a second call is almost guaranteed
1312 2919 * to succeed in that case, though. and looping a few more times
1313#if EV_USE_MONOTONIC 2920 * doesn't hurt either as we only do this on time-jumps or
1314 if (expect_true (have_monotonic)) 2921 * in the unlikely event of having been preempted here.
1315 { 2922 */
1316 if (time_update_monotonic (EV_A)) 2923 for (i = 4; --i; )
1317 { 2924 {
1318 ev_tstamp odiff = rtmn_diff; 2925 ev_tstamp diff;
1319
1320 /* loop a few times, before making important decisions.
1321 * on the choice of "4": one iteration isn't enough,
1322 * in case we get preempted during the calls to
1323 * ev_time and get_clock. a second call is almost guaranteed
1324 * to succeed in that case, though. and looping a few more times
1325 * doesn't hurt either as we only do this on time-jumps or
1326 * in the unlikely event of having been preempted here.
1327 */
1328 for (i = 4; --i; )
1329 {
1330 rtmn_diff = ev_rt_now - mn_now; 2926 rtmn_diff = ev_rt_now - mn_now;
1331 2927
1332 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2928 diff = odiff - rtmn_diff;
2929
2930 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1333 return; /* all is well */ 2931 return; /* all is well */
1334 2932
1335 ev_rt_now = ev_time (); 2933 ev_rt_now = ev_time ();
1336 mn_now = get_clock (); 2934 mn_now = get_clock ();
1337 now_floor = mn_now; 2935 now_floor = mn_now;
1338 } 2936 }
1339 2937
2938 /* no timer adjustment, as the monotonic clock doesn't jump */
2939 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1340# if EV_PERIODIC_ENABLE 2940# if EV_PERIODIC_ENABLE
1341 periodics_reschedule (EV_A); 2941 periodics_reschedule (EV_A);
1342# endif 2942# endif
1343 /* no timer adjustment, as the monotonic clock doesn't jump */
1344 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1345 }
1346 } 2943 }
1347 else 2944 else
1348#endif 2945#endif
1349 { 2946 {
1350 ev_rt_now = ev_time (); 2947 ev_rt_now = ev_time ();
1351 2948
1352 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2949 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1353 { 2950 {
2951 /* adjust timers. this is easy, as the offset is the same for all of them */
2952 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1354#if EV_PERIODIC_ENABLE 2953#if EV_PERIODIC_ENABLE
1355 periodics_reschedule (EV_A); 2954 periodics_reschedule (EV_A);
1356#endif 2955#endif
1357
1358 /* adjust timers. this is easy, as the offset is the same for all of them */
1359 for (i = 0; i < timercnt; ++i)
1360 ((WT)timers [i])->at += ev_rt_now - mn_now;
1361 } 2956 }
1362 2957
1363 mn_now = ev_rt_now; 2958 mn_now = ev_rt_now;
1364 } 2959 }
1365} 2960}
1366 2961
1367void 2962int
1368ev_ref (EV_P)
1369{
1370 ++activecnt;
1371}
1372
1373void
1374ev_unref (EV_P)
1375{
1376 --activecnt;
1377}
1378
1379static int loop_done;
1380
1381void
1382ev_loop (EV_P_ int flags) 2963ev_run (EV_P_ int flags)
1383{ 2964{
1384 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2965#if EV_FEATURE_API
1385 ? EVUNLOOP_ONE 2966 ++loop_depth;
1386 : EVUNLOOP_CANCEL; 2967#endif
1387 2968
2969 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2970
2971 loop_done = EVBREAK_CANCEL;
2972
1388 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2973 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1389 2974
1390 do 2975 do
1391 { 2976 {
2977#if EV_VERIFY >= 2
2978 ev_verify (EV_A);
2979#endif
2980
1392#ifndef _WIN32 2981#ifndef _WIN32
1393 if (expect_false (curpid)) /* penalise the forking check even more */ 2982 if (expect_false (curpid)) /* penalise the forking check even more */
1394 if (expect_false (getpid () != curpid)) 2983 if (expect_false (getpid () != curpid))
1395 { 2984 {
1396 curpid = getpid (); 2985 curpid = getpid ();
… …
1402 /* we might have forked, so queue fork handlers */ 2991 /* we might have forked, so queue fork handlers */
1403 if (expect_false (postfork)) 2992 if (expect_false (postfork))
1404 if (forkcnt) 2993 if (forkcnt)
1405 { 2994 {
1406 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2995 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1407 call_pending (EV_A); 2996 EV_INVOKE_PENDING;
1408 } 2997 }
1409#endif 2998#endif
1410 2999
3000#if EV_PREPARE_ENABLE
1411 /* queue check watchers (and execute them) */ 3001 /* queue prepare watchers (and execute them) */
1412 if (expect_false (preparecnt)) 3002 if (expect_false (preparecnt))
1413 { 3003 {
1414 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3004 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1415 call_pending (EV_A); 3005 EV_INVOKE_PENDING;
1416 } 3006 }
3007#endif
1417 3008
1418 if (expect_false (!activecnt)) 3009 if (expect_false (loop_done))
1419 break; 3010 break;
1420 3011
1421 /* we might have forked, so reify kernel state if necessary */ 3012 /* we might have forked, so reify kernel state if necessary */
1422 if (expect_false (postfork)) 3013 if (expect_false (postfork))
1423 loop_fork (EV_A); 3014 loop_fork (EV_A);
… …
1425 /* update fd-related kernel structures */ 3016 /* update fd-related kernel structures */
1426 fd_reify (EV_A); 3017 fd_reify (EV_A);
1427 3018
1428 /* calculate blocking time */ 3019 /* calculate blocking time */
1429 { 3020 {
1430 ev_tstamp block; 3021 ev_tstamp waittime = 0.;
3022 ev_tstamp sleeptime = 0.;
1431 3023
1432 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 3024 /* remember old timestamp for io_blocktime calculation */
1433 block = 0.; /* do not block at all */ 3025 ev_tstamp prev_mn_now = mn_now;
1434 else 3026
3027 /* update time to cancel out callback processing overhead */
3028 time_update (EV_A_ 1e100);
3029
3030 /* from now on, we want a pipe-wake-up */
3031 pipe_write_wanted = 1;
3032
3033 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3034
3035 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1435 { 3036 {
1436 /* update time to cancel out callback processing overhead */
1437#if EV_USE_MONOTONIC
1438 if (expect_true (have_monotonic))
1439 time_update_monotonic (EV_A);
1440 else
1441#endif
1442 {
1443 ev_rt_now = ev_time ();
1444 mn_now = ev_rt_now;
1445 }
1446
1447 block = MAX_BLOCKTIME; 3037 waittime = MAX_BLOCKTIME;
1448 3038
1449 if (timercnt) 3039 if (timercnt)
1450 { 3040 {
1451 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3041 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1452 if (block > to) block = to; 3042 if (waittime > to) waittime = to;
1453 } 3043 }
1454 3044
1455#if EV_PERIODIC_ENABLE 3045#if EV_PERIODIC_ENABLE
1456 if (periodiccnt) 3046 if (periodiccnt)
1457 { 3047 {
1458 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3048 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1459 if (block > to) block = to; 3049 if (waittime > to) waittime = to;
1460 } 3050 }
1461#endif 3051#endif
1462 3052
3053 /* don't let timeouts decrease the waittime below timeout_blocktime */
3054 if (expect_false (waittime < timeout_blocktime))
3055 waittime = timeout_blocktime;
3056
3057 /* at this point, we NEED to wait, so we have to ensure */
3058 /* to pass a minimum nonzero value to the backend */
3059 if (expect_false (waittime < backend_mintime))
3060 waittime = backend_mintime;
3061
3062 /* extra check because io_blocktime is commonly 0 */
1463 if (expect_false (block < 0.)) block = 0.; 3063 if (expect_false (io_blocktime))
3064 {
3065 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3066
3067 if (sleeptime > waittime - backend_mintime)
3068 sleeptime = waittime - backend_mintime;
3069
3070 if (expect_true (sleeptime > 0.))
3071 {
3072 ev_sleep (sleeptime);
3073 waittime -= sleeptime;
3074 }
3075 }
1464 } 3076 }
1465 3077
3078#if EV_FEATURE_API
1466 ++loop_count; 3079 ++loop_count;
3080#endif
3081 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1467 backend_poll (EV_A_ block); 3082 backend_poll (EV_A_ waittime);
3083 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3084
3085 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3086
3087 if (pipe_write_skipped)
3088 {
3089 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3090 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3091 }
3092
3093
3094 /* update ev_rt_now, do magic */
3095 time_update (EV_A_ waittime + sleeptime);
1468 } 3096 }
1469
1470 /* update ev_rt_now, do magic */
1471 time_update (EV_A);
1472 3097
1473 /* queue pending timers and reschedule them */ 3098 /* queue pending timers and reschedule them */
1474 timers_reify (EV_A); /* relative timers called last */ 3099 timers_reify (EV_A); /* relative timers called last */
1475#if EV_PERIODIC_ENABLE 3100#if EV_PERIODIC_ENABLE
1476 periodics_reify (EV_A); /* absolute timers called first */ 3101 periodics_reify (EV_A); /* absolute timers called first */
… …
1479#if EV_IDLE_ENABLE 3104#if EV_IDLE_ENABLE
1480 /* queue idle watchers unless other events are pending */ 3105 /* queue idle watchers unless other events are pending */
1481 idle_reify (EV_A); 3106 idle_reify (EV_A);
1482#endif 3107#endif
1483 3108
3109#if EV_CHECK_ENABLE
1484 /* queue check watchers, to be executed first */ 3110 /* queue check watchers, to be executed first */
1485 if (expect_false (checkcnt)) 3111 if (expect_false (checkcnt))
1486 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3112 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3113#endif
1487 3114
1488 call_pending (EV_A); 3115 EV_INVOKE_PENDING;
1489
1490 } 3116 }
1491 while (expect_true (activecnt && !loop_done)); 3117 while (expect_true (
3118 activecnt
3119 && !loop_done
3120 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3121 ));
1492 3122
1493 if (loop_done == EVUNLOOP_ONE) 3123 if (loop_done == EVBREAK_ONE)
1494 loop_done = EVUNLOOP_CANCEL; 3124 loop_done = EVBREAK_CANCEL;
3125
3126#if EV_FEATURE_API
3127 --loop_depth;
3128#endif
3129
3130 return activecnt;
1495} 3131}
1496 3132
1497void 3133void
1498ev_unloop (EV_P_ int how) 3134ev_break (EV_P_ int how) EV_THROW
1499{ 3135{
1500 loop_done = how; 3136 loop_done = how;
1501} 3137}
1502 3138
3139void
3140ev_ref (EV_P) EV_THROW
3141{
3142 ++activecnt;
3143}
3144
3145void
3146ev_unref (EV_P) EV_THROW
3147{
3148 --activecnt;
3149}
3150
3151void
3152ev_now_update (EV_P) EV_THROW
3153{
3154 time_update (EV_A_ 1e100);
3155}
3156
3157void
3158ev_suspend (EV_P) EV_THROW
3159{
3160 ev_now_update (EV_A);
3161}
3162
3163void
3164ev_resume (EV_P) EV_THROW
3165{
3166 ev_tstamp mn_prev = mn_now;
3167
3168 ev_now_update (EV_A);
3169 timers_reschedule (EV_A_ mn_now - mn_prev);
3170#if EV_PERIODIC_ENABLE
3171 /* TODO: really do this? */
3172 periodics_reschedule (EV_A);
3173#endif
3174}
3175
1503/*****************************************************************************/ 3176/*****************************************************************************/
3177/* singly-linked list management, used when the expected list length is short */
1504 3178
1505void inline_size 3179inline_size void
1506wlist_add (WL *head, WL elem) 3180wlist_add (WL *head, WL elem)
1507{ 3181{
1508 elem->next = *head; 3182 elem->next = *head;
1509 *head = elem; 3183 *head = elem;
1510} 3184}
1511 3185
1512void inline_size 3186inline_size void
1513wlist_del (WL *head, WL elem) 3187wlist_del (WL *head, WL elem)
1514{ 3188{
1515 while (*head) 3189 while (*head)
1516 { 3190 {
1517 if (*head == elem) 3191 if (expect_true (*head == elem))
1518 { 3192 {
1519 *head = elem->next; 3193 *head = elem->next;
1520 return; 3194 break;
1521 } 3195 }
1522 3196
1523 head = &(*head)->next; 3197 head = &(*head)->next;
1524 } 3198 }
1525} 3199}
1526 3200
1527void inline_speed 3201/* internal, faster, version of ev_clear_pending */
3202inline_speed void
1528clear_pending (EV_P_ W w) 3203clear_pending (EV_P_ W w)
1529{ 3204{
1530 if (w->pending) 3205 if (w->pending)
1531 { 3206 {
1532 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3207 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1533 w->pending = 0; 3208 w->pending = 0;
1534 } 3209 }
1535} 3210}
1536 3211
1537int 3212int
1538ev_clear_pending (EV_P_ void *w) 3213ev_clear_pending (EV_P_ void *w) EV_THROW
1539{ 3214{
1540 W w_ = (W)w; 3215 W w_ = (W)w;
1541 int pending = w_->pending; 3216 int pending = w_->pending;
1542 3217
1543 if (!pending) 3218 if (expect_true (pending))
3219 {
3220 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3221 p->w = (W)&pending_w;
3222 w_->pending = 0;
3223 return p->events;
3224 }
3225 else
1544 return 0; 3226 return 0;
1545
1546 w_->pending = 0;
1547 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1548 p->w = 0;
1549
1550 return p->events;
1551} 3227}
1552 3228
1553void inline_size 3229inline_size void
1554pri_adjust (EV_P_ W w) 3230pri_adjust (EV_P_ W w)
1555{ 3231{
1556 int pri = w->priority; 3232 int pri = ev_priority (w);
1557 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3233 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1558 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3234 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1559 w->priority = pri; 3235 ev_set_priority (w, pri);
1560} 3236}
1561 3237
1562void inline_speed 3238inline_speed void
1563ev_start (EV_P_ W w, int active) 3239ev_start (EV_P_ W w, int active)
1564{ 3240{
1565 pri_adjust (EV_A_ w); 3241 pri_adjust (EV_A_ w);
1566 w->active = active; 3242 w->active = active;
1567 ev_ref (EV_A); 3243 ev_ref (EV_A);
1568} 3244}
1569 3245
1570void inline_size 3246inline_size void
1571ev_stop (EV_P_ W w) 3247ev_stop (EV_P_ W w)
1572{ 3248{
1573 ev_unref (EV_A); 3249 ev_unref (EV_A);
1574 w->active = 0; 3250 w->active = 0;
1575} 3251}
1576 3252
1577/*****************************************************************************/ 3253/*****************************************************************************/
1578 3254
1579void 3255void noinline
1580ev_io_start (EV_P_ ev_io *w) 3256ev_io_start (EV_P_ ev_io *w) EV_THROW
1581{ 3257{
1582 int fd = w->fd; 3258 int fd = w->fd;
1583 3259
1584 if (expect_false (ev_is_active (w))) 3260 if (expect_false (ev_is_active (w)))
1585 return; 3261 return;
1586 3262
1587 assert (("ev_io_start called with negative fd", fd >= 0)); 3263 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3264 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3265
3266 EV_FREQUENT_CHECK;
1588 3267
1589 ev_start (EV_A_ (W)w, 1); 3268 ev_start (EV_A_ (W)w, 1);
1590 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3269 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1591 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3270 wlist_add (&anfds[fd].head, (WL)w);
1592 3271
1593 fd_change (EV_A_ fd); 3272 /* common bug, apparently */
1594} 3273 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
1595 3274
1596void 3275 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3276 w->events &= ~EV__IOFDSET;
3277
3278 EV_FREQUENT_CHECK;
3279}
3280
3281void noinline
1597ev_io_stop (EV_P_ ev_io *w) 3282ev_io_stop (EV_P_ ev_io *w) EV_THROW
1598{ 3283{
1599 clear_pending (EV_A_ (W)w); 3284 clear_pending (EV_A_ (W)w);
1600 if (expect_false (!ev_is_active (w))) 3285 if (expect_false (!ev_is_active (w)))
1601 return; 3286 return;
1602 3287
1603 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3288 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1604 3289
3290 EV_FREQUENT_CHECK;
3291
1605 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3292 wlist_del (&anfds[w->fd].head, (WL)w);
1606 ev_stop (EV_A_ (W)w); 3293 ev_stop (EV_A_ (W)w);
1607 3294
1608 fd_change (EV_A_ w->fd); 3295 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1609}
1610 3296
1611void 3297 EV_FREQUENT_CHECK;
3298}
3299
3300void noinline
1612ev_timer_start (EV_P_ ev_timer *w) 3301ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1613{ 3302{
1614 if (expect_false (ev_is_active (w))) 3303 if (expect_false (ev_is_active (w)))
1615 return; 3304 return;
1616 3305
1617 ((WT)w)->at += mn_now; 3306 ev_at (w) += mn_now;
1618 3307
1619 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3308 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1620 3309
3310 EV_FREQUENT_CHECK;
3311
3312 ++timercnt;
1621 ev_start (EV_A_ (W)w, ++timercnt); 3313 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1622 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 3314 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1623 timers [timercnt - 1] = w; 3315 ANHE_w (timers [ev_active (w)]) = (WT)w;
1624 upheap ((WT *)timers, timercnt - 1); 3316 ANHE_at_cache (timers [ev_active (w)]);
3317 upheap (timers, ev_active (w));
1625 3318
3319 EV_FREQUENT_CHECK;
3320
1626 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3321 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1627} 3322}
1628 3323
1629void 3324void noinline
1630ev_timer_stop (EV_P_ ev_timer *w) 3325ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1631{ 3326{
1632 clear_pending (EV_A_ (W)w); 3327 clear_pending (EV_A_ (W)w);
1633 if (expect_false (!ev_is_active (w))) 3328 if (expect_false (!ev_is_active (w)))
1634 return; 3329 return;
1635 3330
1636 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3331 EV_FREQUENT_CHECK;
1637 3332
1638 { 3333 {
1639 int active = ((W)w)->active; 3334 int active = ev_active (w);
1640 3335
3336 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3337
3338 --timercnt;
3339
1641 if (expect_true (--active < --timercnt)) 3340 if (expect_true (active < timercnt + HEAP0))
1642 { 3341 {
1643 timers [active] = timers [timercnt]; 3342 timers [active] = timers [timercnt + HEAP0];
1644 adjustheap ((WT *)timers, timercnt, active); 3343 adjustheap (timers, timercnt, active);
1645 } 3344 }
1646 } 3345 }
1647 3346
1648 ((WT)w)->at -= mn_now; 3347 ev_at (w) -= mn_now;
1649 3348
1650 ev_stop (EV_A_ (W)w); 3349 ev_stop (EV_A_ (W)w);
1651}
1652 3350
1653void 3351 EV_FREQUENT_CHECK;
3352}
3353
3354void noinline
1654ev_timer_again (EV_P_ ev_timer *w) 3355ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1655{ 3356{
3357 EV_FREQUENT_CHECK;
3358
3359 clear_pending (EV_A_ (W)w);
3360
1656 if (ev_is_active (w)) 3361 if (ev_is_active (w))
1657 { 3362 {
1658 if (w->repeat) 3363 if (w->repeat)
1659 { 3364 {
1660 ((WT)w)->at = mn_now + w->repeat; 3365 ev_at (w) = mn_now + w->repeat;
3366 ANHE_at_cache (timers [ev_active (w)]);
1661 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3367 adjustheap (timers, timercnt, ev_active (w));
1662 } 3368 }
1663 else 3369 else
1664 ev_timer_stop (EV_A_ w); 3370 ev_timer_stop (EV_A_ w);
1665 } 3371 }
1666 else if (w->repeat) 3372 else if (w->repeat)
1667 { 3373 {
1668 w->at = w->repeat; 3374 ev_at (w) = w->repeat;
1669 ev_timer_start (EV_A_ w); 3375 ev_timer_start (EV_A_ w);
1670 } 3376 }
3377
3378 EV_FREQUENT_CHECK;
3379}
3380
3381ev_tstamp
3382ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3383{
3384 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1671} 3385}
1672 3386
1673#if EV_PERIODIC_ENABLE 3387#if EV_PERIODIC_ENABLE
1674void 3388void noinline
1675ev_periodic_start (EV_P_ ev_periodic *w) 3389ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1676{ 3390{
1677 if (expect_false (ev_is_active (w))) 3391 if (expect_false (ev_is_active (w)))
1678 return; 3392 return;
1679 3393
1680 if (w->reschedule_cb) 3394 if (w->reschedule_cb)
1681 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3395 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1682 else if (w->interval) 3396 else if (w->interval)
1683 { 3397 {
1684 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3398 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1685 /* this formula differs from the one in periodic_reify because we do not always round up */ 3399 periodic_recalc (EV_A_ w);
1686 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1687 } 3400 }
3401 else
3402 ev_at (w) = w->offset;
1688 3403
3404 EV_FREQUENT_CHECK;
3405
3406 ++periodiccnt;
1689 ev_start (EV_A_ (W)w, ++periodiccnt); 3407 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1690 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3408 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1691 periodics [periodiccnt - 1] = w; 3409 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1692 upheap ((WT *)periodics, periodiccnt - 1); 3410 ANHE_at_cache (periodics [ev_active (w)]);
3411 upheap (periodics, ev_active (w));
1693 3412
3413 EV_FREQUENT_CHECK;
3414
1694 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3415 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1695} 3416}
1696 3417
1697void 3418void noinline
1698ev_periodic_stop (EV_P_ ev_periodic *w) 3419ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1699{ 3420{
1700 clear_pending (EV_A_ (W)w); 3421 clear_pending (EV_A_ (W)w);
1701 if (expect_false (!ev_is_active (w))) 3422 if (expect_false (!ev_is_active (w)))
1702 return; 3423 return;
1703 3424
1704 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3425 EV_FREQUENT_CHECK;
1705 3426
1706 { 3427 {
1707 int active = ((W)w)->active; 3428 int active = ev_active (w);
1708 3429
3430 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3431
3432 --periodiccnt;
3433
1709 if (expect_true (--active < --periodiccnt)) 3434 if (expect_true (active < periodiccnt + HEAP0))
1710 { 3435 {
1711 periodics [active] = periodics [periodiccnt]; 3436 periodics [active] = periodics [periodiccnt + HEAP0];
1712 adjustheap ((WT *)periodics, periodiccnt, active); 3437 adjustheap (periodics, periodiccnt, active);
1713 } 3438 }
1714 } 3439 }
1715 3440
1716 ev_stop (EV_A_ (W)w); 3441 ev_stop (EV_A_ (W)w);
1717}
1718 3442
1719void 3443 EV_FREQUENT_CHECK;
3444}
3445
3446void noinline
1720ev_periodic_again (EV_P_ ev_periodic *w) 3447ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1721{ 3448{
1722 /* TODO: use adjustheap and recalculation */ 3449 /* TODO: use adjustheap and recalculation */
1723 ev_periodic_stop (EV_A_ w); 3450 ev_periodic_stop (EV_A_ w);
1724 ev_periodic_start (EV_A_ w); 3451 ev_periodic_start (EV_A_ w);
1725} 3452}
… …
1727 3454
1728#ifndef SA_RESTART 3455#ifndef SA_RESTART
1729# define SA_RESTART 0 3456# define SA_RESTART 0
1730#endif 3457#endif
1731 3458
1732void 3459#if EV_SIGNAL_ENABLE
3460
3461void noinline
1733ev_signal_start (EV_P_ ev_signal *w) 3462ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1734{ 3463{
1735#if EV_MULTIPLICITY
1736 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1737#endif
1738 if (expect_false (ev_is_active (w))) 3464 if (expect_false (ev_is_active (w)))
1739 return; 3465 return;
1740 3466
1741 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3467 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3468
3469#if EV_MULTIPLICITY
3470 assert (("libev: a signal must not be attached to two different loops",
3471 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3472
3473 signals [w->signum - 1].loop = EV_A;
3474#endif
3475
3476 EV_FREQUENT_CHECK;
3477
3478#if EV_USE_SIGNALFD
3479 if (sigfd == -2)
3480 {
3481 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3482 if (sigfd < 0 && errno == EINVAL)
3483 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3484
3485 if (sigfd >= 0)
3486 {
3487 fd_intern (sigfd); /* doing it twice will not hurt */
3488
3489 sigemptyset (&sigfd_set);
3490
3491 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3492 ev_set_priority (&sigfd_w, EV_MAXPRI);
3493 ev_io_start (EV_A_ &sigfd_w);
3494 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3495 }
3496 }
3497
3498 if (sigfd >= 0)
3499 {
3500 /* TODO: check .head */
3501 sigaddset (&sigfd_set, w->signum);
3502 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3503
3504 signalfd (sigfd, &sigfd_set, 0);
3505 }
3506#endif
1742 3507
1743 ev_start (EV_A_ (W)w, 1); 3508 ev_start (EV_A_ (W)w, 1);
1744 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1745 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3509 wlist_add (&signals [w->signum - 1].head, (WL)w);
1746 3510
1747 if (!((WL)w)->next) 3511 if (!((WL)w)->next)
3512# if EV_USE_SIGNALFD
3513 if (sigfd < 0) /*TODO*/
3514# endif
1748 { 3515 {
1749#if _WIN32 3516# ifdef _WIN32
3517 evpipe_init (EV_A);
3518
1750 signal (w->signum, sighandler); 3519 signal (w->signum, ev_sighandler);
1751#else 3520# else
1752 struct sigaction sa; 3521 struct sigaction sa;
3522
3523 evpipe_init (EV_A);
3524
1753 sa.sa_handler = sighandler; 3525 sa.sa_handler = ev_sighandler;
1754 sigfillset (&sa.sa_mask); 3526 sigfillset (&sa.sa_mask);
1755 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3527 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1756 sigaction (w->signum, &sa, 0); 3528 sigaction (w->signum, &sa, 0);
3529
3530 if (origflags & EVFLAG_NOSIGMASK)
3531 {
3532 sigemptyset (&sa.sa_mask);
3533 sigaddset (&sa.sa_mask, w->signum);
3534 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3535 }
1757#endif 3536#endif
1758 } 3537 }
1759}
1760 3538
1761void 3539 EV_FREQUENT_CHECK;
3540}
3541
3542void noinline
1762ev_signal_stop (EV_P_ ev_signal *w) 3543ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1763{ 3544{
1764 clear_pending (EV_A_ (W)w); 3545 clear_pending (EV_A_ (W)w);
1765 if (expect_false (!ev_is_active (w))) 3546 if (expect_false (!ev_is_active (w)))
1766 return; 3547 return;
1767 3548
3549 EV_FREQUENT_CHECK;
3550
1768 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3551 wlist_del (&signals [w->signum - 1].head, (WL)w);
1769 ev_stop (EV_A_ (W)w); 3552 ev_stop (EV_A_ (W)w);
1770 3553
1771 if (!signals [w->signum - 1].head) 3554 if (!signals [w->signum - 1].head)
3555 {
3556#if EV_MULTIPLICITY
3557 signals [w->signum - 1].loop = 0; /* unattach from signal */
3558#endif
3559#if EV_USE_SIGNALFD
3560 if (sigfd >= 0)
3561 {
3562 sigset_t ss;
3563
3564 sigemptyset (&ss);
3565 sigaddset (&ss, w->signum);
3566 sigdelset (&sigfd_set, w->signum);
3567
3568 signalfd (sigfd, &sigfd_set, 0);
3569 sigprocmask (SIG_UNBLOCK, &ss, 0);
3570 }
3571 else
3572#endif
1772 signal (w->signum, SIG_DFL); 3573 signal (w->signum, SIG_DFL);
3574 }
3575
3576 EV_FREQUENT_CHECK;
1773} 3577}
3578
3579#endif
3580
3581#if EV_CHILD_ENABLE
1774 3582
1775void 3583void
1776ev_child_start (EV_P_ ev_child *w) 3584ev_child_start (EV_P_ ev_child *w) EV_THROW
1777{ 3585{
1778#if EV_MULTIPLICITY 3586#if EV_MULTIPLICITY
1779 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3587 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1780#endif 3588#endif
1781 if (expect_false (ev_is_active (w))) 3589 if (expect_false (ev_is_active (w)))
1782 return; 3590 return;
1783 3591
3592 EV_FREQUENT_CHECK;
3593
1784 ev_start (EV_A_ (W)w, 1); 3594 ev_start (EV_A_ (W)w, 1);
1785 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3595 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3596
3597 EV_FREQUENT_CHECK;
1786} 3598}
1787 3599
1788void 3600void
1789ev_child_stop (EV_P_ ev_child *w) 3601ev_child_stop (EV_P_ ev_child *w) EV_THROW
1790{ 3602{
1791 clear_pending (EV_A_ (W)w); 3603 clear_pending (EV_A_ (W)w);
1792 if (expect_false (!ev_is_active (w))) 3604 if (expect_false (!ev_is_active (w)))
1793 return; 3605 return;
1794 3606
3607 EV_FREQUENT_CHECK;
3608
1795 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3609 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1796 ev_stop (EV_A_ (W)w); 3610 ev_stop (EV_A_ (W)w);
3611
3612 EV_FREQUENT_CHECK;
1797} 3613}
3614
3615#endif
1798 3616
1799#if EV_STAT_ENABLE 3617#if EV_STAT_ENABLE
1800 3618
1801# ifdef _WIN32 3619# ifdef _WIN32
1802# undef lstat 3620# undef lstat
1803# define lstat(a,b) _stati64 (a,b) 3621# define lstat(a,b) _stati64 (a,b)
1804# endif 3622# endif
1805 3623
1806#define DEF_STAT_INTERVAL 5.0074891 3624#define DEF_STAT_INTERVAL 5.0074891
3625#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1807#define MIN_STAT_INTERVAL 0.1074891 3626#define MIN_STAT_INTERVAL 0.1074891
1808 3627
1809static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3628static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1810 3629
1811#if EV_USE_INOTIFY 3630#if EV_USE_INOTIFY
1812# define EV_INOTIFY_BUFSIZE 8192 3631
3632/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3633# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1813 3634
1814static void noinline 3635static void noinline
1815infy_add (EV_P_ ev_stat *w) 3636infy_add (EV_P_ ev_stat *w)
1816{ 3637{
1817 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); 3638 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);
1818 3639
1819 if (w->wd < 0) 3640 if (w->wd >= 0)
3641 {
3642 struct statfs sfs;
3643
3644 /* now local changes will be tracked by inotify, but remote changes won't */
3645 /* unless the filesystem is known to be local, we therefore still poll */
3646 /* also do poll on <2.6.25, but with normal frequency */
3647
3648 if (!fs_2625)
3649 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3650 else if (!statfs (w->path, &sfs)
3651 && (sfs.f_type == 0x1373 /* devfs */
3652 || sfs.f_type == 0xEF53 /* ext2/3 */
3653 || sfs.f_type == 0x3153464a /* jfs */
3654 || sfs.f_type == 0x52654973 /* reiser3 */
3655 || sfs.f_type == 0x01021994 /* tempfs */
3656 || sfs.f_type == 0x58465342 /* xfs */))
3657 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3658 else
3659 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1820 { 3660 }
1821 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3661 else
3662 {
3663 /* can't use inotify, continue to stat */
3664 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1822 3665
1823 /* monitor some parent directory for speedup hints */ 3666 /* if path is not there, monitor some parent directory for speedup hints */
3667 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3668 /* but an efficiency issue only */
1824 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3669 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1825 { 3670 {
1826 char path [4096]; 3671 char path [4096];
1827 strcpy (path, w->path); 3672 strcpy (path, w->path);
1828 3673
… …
1831 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3676 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1832 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3677 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1833 3678
1834 char *pend = strrchr (path, '/'); 3679 char *pend = strrchr (path, '/');
1835 3680
1836 if (!pend) 3681 if (!pend || pend == path)
1837 break; /* whoops, no '/', complain to your admin */ 3682 break;
1838 3683
1839 *pend = 0; 3684 *pend = 0;
1840 w->wd = inotify_add_watch (fs_fd, path, mask); 3685 w->wd = inotify_add_watch (fs_fd, path, mask);
1841 } 3686 }
1842 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3687 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1843 } 3688 }
1844 } 3689 }
1845 else
1846 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1847 3690
1848 if (w->wd >= 0) 3691 if (w->wd >= 0)
1849 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3692 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3693
3694 /* now re-arm timer, if required */
3695 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3696 ev_timer_again (EV_A_ &w->timer);
3697 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1850} 3698}
1851 3699
1852static void noinline 3700static void noinline
1853infy_del (EV_P_ ev_stat *w) 3701infy_del (EV_P_ ev_stat *w)
1854{ 3702{
… …
1857 3705
1858 if (wd < 0) 3706 if (wd < 0)
1859 return; 3707 return;
1860 3708
1861 w->wd = -2; 3709 w->wd = -2;
1862 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3710 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1863 wlist_del (&fs_hash [slot].head, (WL)w); 3711 wlist_del (&fs_hash [slot].head, (WL)w);
1864 3712
1865 /* remove this watcher, if others are watching it, they will rearm */ 3713 /* remove this watcher, if others are watching it, they will rearm */
1866 inotify_rm_watch (fs_fd, wd); 3714 inotify_rm_watch (fs_fd, wd);
1867} 3715}
1868 3716
1869static void noinline 3717static void noinline
1870infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3718infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1871{ 3719{
1872 if (slot < 0) 3720 if (slot < 0)
1873 /* overflow, need to check for all hahs slots */ 3721 /* overflow, need to check for all hash slots */
1874 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3722 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1875 infy_wd (EV_A_ slot, wd, ev); 3723 infy_wd (EV_A_ slot, wd, ev);
1876 else 3724 else
1877 { 3725 {
1878 WL w_; 3726 WL w_;
1879 3727
1880 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3728 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1881 { 3729 {
1882 ev_stat *w = (ev_stat *)w_; 3730 ev_stat *w = (ev_stat *)w_;
1883 w_ = w_->next; /* lets us remove this watcher and all before it */ 3731 w_ = w_->next; /* lets us remove this watcher and all before it */
1884 3732
1885 if (w->wd == wd || wd == -1) 3733 if (w->wd == wd || wd == -1)
1886 { 3734 {
1887 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3735 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1888 { 3736 {
3737 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1889 w->wd = -1; 3738 w->wd = -1;
1890 infy_add (EV_A_ w); /* re-add, no matter what */ 3739 infy_add (EV_A_ w); /* re-add, no matter what */
1891 } 3740 }
1892 3741
1893 stat_timer_cb (EV_A_ &w->timer, 0); 3742 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1898 3747
1899static void 3748static void
1900infy_cb (EV_P_ ev_io *w, int revents) 3749infy_cb (EV_P_ ev_io *w, int revents)
1901{ 3750{
1902 char buf [EV_INOTIFY_BUFSIZE]; 3751 char buf [EV_INOTIFY_BUFSIZE];
1903 struct inotify_event *ev = (struct inotify_event *)buf;
1904 int ofs; 3752 int ofs;
1905 int len = read (fs_fd, buf, sizeof (buf)); 3753 int len = read (fs_fd, buf, sizeof (buf));
1906 3754
1907 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3755 for (ofs = 0; ofs < len; )
3756 {
3757 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1908 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3758 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3759 ofs += sizeof (struct inotify_event) + ev->len;
3760 }
1909} 3761}
1910 3762
1911void inline_size 3763inline_size void ecb_cold
3764ev_check_2625 (EV_P)
3765{
3766 /* kernels < 2.6.25 are borked
3767 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3768 */
3769 if (ev_linux_version () < 0x020619)
3770 return;
3771
3772 fs_2625 = 1;
3773}
3774
3775inline_size int
3776infy_newfd (void)
3777{
3778#if defined IN_CLOEXEC && defined IN_NONBLOCK
3779 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3780 if (fd >= 0)
3781 return fd;
3782#endif
3783 return inotify_init ();
3784}
3785
3786inline_size void
1912infy_init (EV_P) 3787infy_init (EV_P)
1913{ 3788{
1914 if (fs_fd != -2) 3789 if (fs_fd != -2)
1915 return; 3790 return;
1916 3791
3792 fs_fd = -1;
3793
3794 ev_check_2625 (EV_A);
3795
1917 fs_fd = inotify_init (); 3796 fs_fd = infy_newfd ();
1918 3797
1919 if (fs_fd >= 0) 3798 if (fs_fd >= 0)
1920 { 3799 {
3800 fd_intern (fs_fd);
1921 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3801 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1922 ev_set_priority (&fs_w, EV_MAXPRI); 3802 ev_set_priority (&fs_w, EV_MAXPRI);
1923 ev_io_start (EV_A_ &fs_w); 3803 ev_io_start (EV_A_ &fs_w);
3804 ev_unref (EV_A);
1924 } 3805 }
1925} 3806}
1926 3807
1927void inline_size 3808inline_size void
1928infy_fork (EV_P) 3809infy_fork (EV_P)
1929{ 3810{
1930 int slot; 3811 int slot;
1931 3812
1932 if (fs_fd < 0) 3813 if (fs_fd < 0)
1933 return; 3814 return;
1934 3815
3816 ev_ref (EV_A);
3817 ev_io_stop (EV_A_ &fs_w);
1935 close (fs_fd); 3818 close (fs_fd);
1936 fs_fd = inotify_init (); 3819 fs_fd = infy_newfd ();
1937 3820
3821 if (fs_fd >= 0)
3822 {
3823 fd_intern (fs_fd);
3824 ev_io_set (&fs_w, fs_fd, EV_READ);
3825 ev_io_start (EV_A_ &fs_w);
3826 ev_unref (EV_A);
3827 }
3828
1938 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3829 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1939 { 3830 {
1940 WL w_ = fs_hash [slot].head; 3831 WL w_ = fs_hash [slot].head;
1941 fs_hash [slot].head = 0; 3832 fs_hash [slot].head = 0;
1942 3833
1943 while (w_) 3834 while (w_)
… …
1948 w->wd = -1; 3839 w->wd = -1;
1949 3840
1950 if (fs_fd >= 0) 3841 if (fs_fd >= 0)
1951 infy_add (EV_A_ w); /* re-add, no matter what */ 3842 infy_add (EV_A_ w); /* re-add, no matter what */
1952 else 3843 else
3844 {
3845 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3846 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1953 ev_timer_start (EV_A_ &w->timer); 3847 ev_timer_again (EV_A_ &w->timer);
3848 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3849 }
1954 } 3850 }
1955
1956 } 3851 }
1957} 3852}
1958 3853
3854#endif
3855
3856#ifdef _WIN32
3857# define EV_LSTAT(p,b) _stati64 (p, b)
3858#else
3859# define EV_LSTAT(p,b) lstat (p, b)
1959#endif 3860#endif
1960 3861
1961void 3862void
1962ev_stat_stat (EV_P_ ev_stat *w) 3863ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1963{ 3864{
1964 if (lstat (w->path, &w->attr) < 0) 3865 if (lstat (w->path, &w->attr) < 0)
1965 w->attr.st_nlink = 0; 3866 w->attr.st_nlink = 0;
1966 else if (!w->attr.st_nlink) 3867 else if (!w->attr.st_nlink)
1967 w->attr.st_nlink = 1; 3868 w->attr.st_nlink = 1;
… …
1970static void noinline 3871static void noinline
1971stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3872stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1972{ 3873{
1973 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3874 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1974 3875
1975 /* we copy this here each the time so that */ 3876 ev_statdata prev = w->attr;
1976 /* prev has the old value when the callback gets invoked */
1977 w->prev = w->attr;
1978 ev_stat_stat (EV_A_ w); 3877 ev_stat_stat (EV_A_ w);
1979 3878
1980 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3879 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1981 if ( 3880 if (
1982 w->prev.st_dev != w->attr.st_dev 3881 prev.st_dev != w->attr.st_dev
1983 || w->prev.st_ino != w->attr.st_ino 3882 || prev.st_ino != w->attr.st_ino
1984 || w->prev.st_mode != w->attr.st_mode 3883 || prev.st_mode != w->attr.st_mode
1985 || w->prev.st_nlink != w->attr.st_nlink 3884 || prev.st_nlink != w->attr.st_nlink
1986 || w->prev.st_uid != w->attr.st_uid 3885 || prev.st_uid != w->attr.st_uid
1987 || w->prev.st_gid != w->attr.st_gid 3886 || prev.st_gid != w->attr.st_gid
1988 || w->prev.st_rdev != w->attr.st_rdev 3887 || prev.st_rdev != w->attr.st_rdev
1989 || w->prev.st_size != w->attr.st_size 3888 || prev.st_size != w->attr.st_size
1990 || w->prev.st_atime != w->attr.st_atime 3889 || prev.st_atime != w->attr.st_atime
1991 || w->prev.st_mtime != w->attr.st_mtime 3890 || prev.st_mtime != w->attr.st_mtime
1992 || w->prev.st_ctime != w->attr.st_ctime 3891 || prev.st_ctime != w->attr.st_ctime
1993 ) { 3892 ) {
3893 /* we only update w->prev on actual differences */
3894 /* in case we test more often than invoke the callback, */
3895 /* to ensure that prev is always different to attr */
3896 w->prev = prev;
3897
1994 #if EV_USE_INOTIFY 3898 #if EV_USE_INOTIFY
3899 if (fs_fd >= 0)
3900 {
1995 infy_del (EV_A_ w); 3901 infy_del (EV_A_ w);
1996 infy_add (EV_A_ w); 3902 infy_add (EV_A_ w);
1997 ev_stat_stat (EV_A_ w); /* avoid race... */ 3903 ev_stat_stat (EV_A_ w); /* avoid race... */
3904 }
1998 #endif 3905 #endif
1999 3906
2000 ev_feed_event (EV_A_ w, EV_STAT); 3907 ev_feed_event (EV_A_ w, EV_STAT);
2001 } 3908 }
2002} 3909}
2003 3910
2004void 3911void
2005ev_stat_start (EV_P_ ev_stat *w) 3912ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2006{ 3913{
2007 if (expect_false (ev_is_active (w))) 3914 if (expect_false (ev_is_active (w)))
2008 return; 3915 return;
2009 3916
2010 /* since we use memcmp, we need to clear any padding data etc. */
2011 memset (&w->prev, 0, sizeof (ev_statdata));
2012 memset (&w->attr, 0, sizeof (ev_statdata));
2013
2014 ev_stat_stat (EV_A_ w); 3917 ev_stat_stat (EV_A_ w);
2015 3918
3919 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2016 if (w->interval < MIN_STAT_INTERVAL) 3920 w->interval = MIN_STAT_INTERVAL;
2017 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2018 3921
2019 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3922 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2020 ev_set_priority (&w->timer, ev_priority (w)); 3923 ev_set_priority (&w->timer, ev_priority (w));
2021 3924
2022#if EV_USE_INOTIFY 3925#if EV_USE_INOTIFY
2023 infy_init (EV_A); 3926 infy_init (EV_A);
2024 3927
2025 if (fs_fd >= 0) 3928 if (fs_fd >= 0)
2026 infy_add (EV_A_ w); 3929 infy_add (EV_A_ w);
2027 else 3930 else
2028#endif 3931#endif
3932 {
2029 ev_timer_start (EV_A_ &w->timer); 3933 ev_timer_again (EV_A_ &w->timer);
3934 ev_unref (EV_A);
3935 }
2030 3936
2031 ev_start (EV_A_ (W)w, 1); 3937 ev_start (EV_A_ (W)w, 1);
3938
3939 EV_FREQUENT_CHECK;
2032} 3940}
2033 3941
2034void 3942void
2035ev_stat_stop (EV_P_ ev_stat *w) 3943ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2036{ 3944{
2037 clear_pending (EV_A_ (W)w); 3945 clear_pending (EV_A_ (W)w);
2038 if (expect_false (!ev_is_active (w))) 3946 if (expect_false (!ev_is_active (w)))
2039 return; 3947 return;
2040 3948
3949 EV_FREQUENT_CHECK;
3950
2041#if EV_USE_INOTIFY 3951#if EV_USE_INOTIFY
2042 infy_del (EV_A_ w); 3952 infy_del (EV_A_ w);
2043#endif 3953#endif
3954
3955 if (ev_is_active (&w->timer))
3956 {
3957 ev_ref (EV_A);
2044 ev_timer_stop (EV_A_ &w->timer); 3958 ev_timer_stop (EV_A_ &w->timer);
3959 }
2045 3960
2046 ev_stop (EV_A_ (W)w); 3961 ev_stop (EV_A_ (W)w);
3962
3963 EV_FREQUENT_CHECK;
2047} 3964}
2048#endif 3965#endif
2049 3966
2050#if EV_IDLE_ENABLE 3967#if EV_IDLE_ENABLE
2051void 3968void
2052ev_idle_start (EV_P_ ev_idle *w) 3969ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2053{ 3970{
2054 if (expect_false (ev_is_active (w))) 3971 if (expect_false (ev_is_active (w)))
2055 return; 3972 return;
2056 3973
2057 pri_adjust (EV_A_ (W)w); 3974 pri_adjust (EV_A_ (W)w);
3975
3976 EV_FREQUENT_CHECK;
2058 3977
2059 { 3978 {
2060 int active = ++idlecnt [ABSPRI (w)]; 3979 int active = ++idlecnt [ABSPRI (w)];
2061 3980
2062 ++idleall; 3981 ++idleall;
2063 ev_start (EV_A_ (W)w, active); 3982 ev_start (EV_A_ (W)w, active);
2064 3983
2065 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3984 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2066 idles [ABSPRI (w)][active - 1] = w; 3985 idles [ABSPRI (w)][active - 1] = w;
2067 } 3986 }
3987
3988 EV_FREQUENT_CHECK;
2068} 3989}
2069 3990
2070void 3991void
2071ev_idle_stop (EV_P_ ev_idle *w) 3992ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2072{ 3993{
2073 clear_pending (EV_A_ (W)w); 3994 clear_pending (EV_A_ (W)w);
2074 if (expect_false (!ev_is_active (w))) 3995 if (expect_false (!ev_is_active (w)))
2075 return; 3996 return;
2076 3997
3998 EV_FREQUENT_CHECK;
3999
2077 { 4000 {
2078 int active = ((W)w)->active; 4001 int active = ev_active (w);
2079 4002
2080 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4003 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2081 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4004 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2082 4005
2083 ev_stop (EV_A_ (W)w); 4006 ev_stop (EV_A_ (W)w);
2084 --idleall; 4007 --idleall;
2085 } 4008 }
2086}
2087#endif
2088 4009
4010 EV_FREQUENT_CHECK;
4011}
4012#endif
4013
4014#if EV_PREPARE_ENABLE
2089void 4015void
2090ev_prepare_start (EV_P_ ev_prepare *w) 4016ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2091{ 4017{
2092 if (expect_false (ev_is_active (w))) 4018 if (expect_false (ev_is_active (w)))
2093 return; 4019 return;
4020
4021 EV_FREQUENT_CHECK;
2094 4022
2095 ev_start (EV_A_ (W)w, ++preparecnt); 4023 ev_start (EV_A_ (W)w, ++preparecnt);
2096 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4024 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2097 prepares [preparecnt - 1] = w; 4025 prepares [preparecnt - 1] = w;
4026
4027 EV_FREQUENT_CHECK;
2098} 4028}
2099 4029
2100void 4030void
2101ev_prepare_stop (EV_P_ ev_prepare *w) 4031ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2102{ 4032{
2103 clear_pending (EV_A_ (W)w); 4033 clear_pending (EV_A_ (W)w);
2104 if (expect_false (!ev_is_active (w))) 4034 if (expect_false (!ev_is_active (w)))
2105 return; 4035 return;
2106 4036
4037 EV_FREQUENT_CHECK;
4038
2107 { 4039 {
2108 int active = ((W)w)->active; 4040 int active = ev_active (w);
4041
2109 prepares [active - 1] = prepares [--preparecnt]; 4042 prepares [active - 1] = prepares [--preparecnt];
2110 ((W)prepares [active - 1])->active = active; 4043 ev_active (prepares [active - 1]) = active;
2111 } 4044 }
2112 4045
2113 ev_stop (EV_A_ (W)w); 4046 ev_stop (EV_A_ (W)w);
2114}
2115 4047
4048 EV_FREQUENT_CHECK;
4049}
4050#endif
4051
4052#if EV_CHECK_ENABLE
2116void 4053void
2117ev_check_start (EV_P_ ev_check *w) 4054ev_check_start (EV_P_ ev_check *w) EV_THROW
2118{ 4055{
2119 if (expect_false (ev_is_active (w))) 4056 if (expect_false (ev_is_active (w)))
2120 return; 4057 return;
4058
4059 EV_FREQUENT_CHECK;
2121 4060
2122 ev_start (EV_A_ (W)w, ++checkcnt); 4061 ev_start (EV_A_ (W)w, ++checkcnt);
2123 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4062 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2124 checks [checkcnt - 1] = w; 4063 checks [checkcnt - 1] = w;
4064
4065 EV_FREQUENT_CHECK;
2125} 4066}
2126 4067
2127void 4068void
2128ev_check_stop (EV_P_ ev_check *w) 4069ev_check_stop (EV_P_ ev_check *w) EV_THROW
2129{ 4070{
2130 clear_pending (EV_A_ (W)w); 4071 clear_pending (EV_A_ (W)w);
2131 if (expect_false (!ev_is_active (w))) 4072 if (expect_false (!ev_is_active (w)))
2132 return; 4073 return;
2133 4074
4075 EV_FREQUENT_CHECK;
4076
2134 { 4077 {
2135 int active = ((W)w)->active; 4078 int active = ev_active (w);
4079
2136 checks [active - 1] = checks [--checkcnt]; 4080 checks [active - 1] = checks [--checkcnt];
2137 ((W)checks [active - 1])->active = active; 4081 ev_active (checks [active - 1]) = active;
2138 } 4082 }
2139 4083
2140 ev_stop (EV_A_ (W)w); 4084 ev_stop (EV_A_ (W)w);
4085
4086 EV_FREQUENT_CHECK;
2141} 4087}
4088#endif
2142 4089
2143#if EV_EMBED_ENABLE 4090#if EV_EMBED_ENABLE
2144void noinline 4091void noinline
2145ev_embed_sweep (EV_P_ ev_embed *w) 4092ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2146{ 4093{
2147 ev_loop (w->loop, EVLOOP_NONBLOCK); 4094 ev_run (w->other, EVRUN_NOWAIT);
2148} 4095}
2149 4096
2150static void 4097static void
2151embed_cb (EV_P_ ev_io *io, int revents) 4098embed_io_cb (EV_P_ ev_io *io, int revents)
2152{ 4099{
2153 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4100 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2154 4101
2155 if (ev_cb (w)) 4102 if (ev_cb (w))
2156 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4103 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2157 else 4104 else
2158 ev_embed_sweep (loop, w); 4105 ev_run (w->other, EVRUN_NOWAIT);
2159} 4106}
4107
4108static void
4109embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4110{
4111 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4112
4113 {
4114 EV_P = w->other;
4115
4116 while (fdchangecnt)
4117 {
4118 fd_reify (EV_A);
4119 ev_run (EV_A_ EVRUN_NOWAIT);
4120 }
4121 }
4122}
4123
4124static void
4125embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4126{
4127 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4128
4129 ev_embed_stop (EV_A_ w);
4130
4131 {
4132 EV_P = w->other;
4133
4134 ev_loop_fork (EV_A);
4135 ev_run (EV_A_ EVRUN_NOWAIT);
4136 }
4137
4138 ev_embed_start (EV_A_ w);
4139}
4140
4141#if 0
4142static void
4143embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4144{
4145 ev_idle_stop (EV_A_ idle);
4146}
4147#endif
2160 4148
2161void 4149void
2162ev_embed_start (EV_P_ ev_embed *w) 4150ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2163{ 4151{
2164 if (expect_false (ev_is_active (w))) 4152 if (expect_false (ev_is_active (w)))
2165 return; 4153 return;
2166 4154
2167 { 4155 {
2168 struct ev_loop *loop = w->loop; 4156 EV_P = w->other;
2169 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4157 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2170 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4158 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2171 } 4159 }
4160
4161 EV_FREQUENT_CHECK;
2172 4162
2173 ev_set_priority (&w->io, ev_priority (w)); 4163 ev_set_priority (&w->io, ev_priority (w));
2174 ev_io_start (EV_A_ &w->io); 4164 ev_io_start (EV_A_ &w->io);
2175 4165
4166 ev_prepare_init (&w->prepare, embed_prepare_cb);
4167 ev_set_priority (&w->prepare, EV_MINPRI);
4168 ev_prepare_start (EV_A_ &w->prepare);
4169
4170 ev_fork_init (&w->fork, embed_fork_cb);
4171 ev_fork_start (EV_A_ &w->fork);
4172
4173 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4174
2176 ev_start (EV_A_ (W)w, 1); 4175 ev_start (EV_A_ (W)w, 1);
4176
4177 EV_FREQUENT_CHECK;
2177} 4178}
2178 4179
2179void 4180void
2180ev_embed_stop (EV_P_ ev_embed *w) 4181ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2181{ 4182{
2182 clear_pending (EV_A_ (W)w); 4183 clear_pending (EV_A_ (W)w);
2183 if (expect_false (!ev_is_active (w))) 4184 if (expect_false (!ev_is_active (w)))
2184 return; 4185 return;
2185 4186
4187 EV_FREQUENT_CHECK;
4188
2186 ev_io_stop (EV_A_ &w->io); 4189 ev_io_stop (EV_A_ &w->io);
4190 ev_prepare_stop (EV_A_ &w->prepare);
4191 ev_fork_stop (EV_A_ &w->fork);
2187 4192
2188 ev_stop (EV_A_ (W)w); 4193 ev_stop (EV_A_ (W)w);
4194
4195 EV_FREQUENT_CHECK;
2189} 4196}
2190#endif 4197#endif
2191 4198
2192#if EV_FORK_ENABLE 4199#if EV_FORK_ENABLE
2193void 4200void
2194ev_fork_start (EV_P_ ev_fork *w) 4201ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2195{ 4202{
2196 if (expect_false (ev_is_active (w))) 4203 if (expect_false (ev_is_active (w)))
2197 return; 4204 return;
4205
4206 EV_FREQUENT_CHECK;
2198 4207
2199 ev_start (EV_A_ (W)w, ++forkcnt); 4208 ev_start (EV_A_ (W)w, ++forkcnt);
2200 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4209 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2201 forks [forkcnt - 1] = w; 4210 forks [forkcnt - 1] = w;
4211
4212 EV_FREQUENT_CHECK;
2202} 4213}
2203 4214
2204void 4215void
2205ev_fork_stop (EV_P_ ev_fork *w) 4216ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2206{ 4217{
2207 clear_pending (EV_A_ (W)w); 4218 clear_pending (EV_A_ (W)w);
2208 if (expect_false (!ev_is_active (w))) 4219 if (expect_false (!ev_is_active (w)))
2209 return; 4220 return;
2210 4221
4222 EV_FREQUENT_CHECK;
4223
2211 { 4224 {
2212 int active = ((W)w)->active; 4225 int active = ev_active (w);
4226
2213 forks [active - 1] = forks [--forkcnt]; 4227 forks [active - 1] = forks [--forkcnt];
2214 ((W)forks [active - 1])->active = active; 4228 ev_active (forks [active - 1]) = active;
2215 } 4229 }
2216 4230
2217 ev_stop (EV_A_ (W)w); 4231 ev_stop (EV_A_ (W)w);
4232
4233 EV_FREQUENT_CHECK;
4234}
4235#endif
4236
4237#if EV_CLEANUP_ENABLE
4238void
4239ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4240{
4241 if (expect_false (ev_is_active (w)))
4242 return;
4243
4244 EV_FREQUENT_CHECK;
4245
4246 ev_start (EV_A_ (W)w, ++cleanupcnt);
4247 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4248 cleanups [cleanupcnt - 1] = w;
4249
4250 /* cleanup watchers should never keep a refcount on the loop */
4251 ev_unref (EV_A);
4252 EV_FREQUENT_CHECK;
4253}
4254
4255void
4256ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4257{
4258 clear_pending (EV_A_ (W)w);
4259 if (expect_false (!ev_is_active (w)))
4260 return;
4261
4262 EV_FREQUENT_CHECK;
4263 ev_ref (EV_A);
4264
4265 {
4266 int active = ev_active (w);
4267
4268 cleanups [active - 1] = cleanups [--cleanupcnt];
4269 ev_active (cleanups [active - 1]) = active;
4270 }
4271
4272 ev_stop (EV_A_ (W)w);
4273
4274 EV_FREQUENT_CHECK;
4275}
4276#endif
4277
4278#if EV_ASYNC_ENABLE
4279void
4280ev_async_start (EV_P_ ev_async *w) EV_THROW
4281{
4282 if (expect_false (ev_is_active (w)))
4283 return;
4284
4285 w->sent = 0;
4286
4287 evpipe_init (EV_A);
4288
4289 EV_FREQUENT_CHECK;
4290
4291 ev_start (EV_A_ (W)w, ++asynccnt);
4292 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4293 asyncs [asynccnt - 1] = w;
4294
4295 EV_FREQUENT_CHECK;
4296}
4297
4298void
4299ev_async_stop (EV_P_ ev_async *w) EV_THROW
4300{
4301 clear_pending (EV_A_ (W)w);
4302 if (expect_false (!ev_is_active (w)))
4303 return;
4304
4305 EV_FREQUENT_CHECK;
4306
4307 {
4308 int active = ev_active (w);
4309
4310 asyncs [active - 1] = asyncs [--asynccnt];
4311 ev_active (asyncs [active - 1]) = active;
4312 }
4313
4314 ev_stop (EV_A_ (W)w);
4315
4316 EV_FREQUENT_CHECK;
4317}
4318
4319void
4320ev_async_send (EV_P_ ev_async *w) EV_THROW
4321{
4322 w->sent = 1;
4323 evpipe_write (EV_A_ &async_pending);
2218} 4324}
2219#endif 4325#endif
2220 4326
2221/*****************************************************************************/ 4327/*****************************************************************************/
2222 4328
… …
2232once_cb (EV_P_ struct ev_once *once, int revents) 4338once_cb (EV_P_ struct ev_once *once, int revents)
2233{ 4339{
2234 void (*cb)(int revents, void *arg) = once->cb; 4340 void (*cb)(int revents, void *arg) = once->cb;
2235 void *arg = once->arg; 4341 void *arg = once->arg;
2236 4342
2237 ev_io_stop (EV_A_ &once->io); 4343 ev_io_stop (EV_A_ &once->io);
2238 ev_timer_stop (EV_A_ &once->to); 4344 ev_timer_stop (EV_A_ &once->to);
2239 ev_free (once); 4345 ev_free (once);
2240 4346
2241 cb (revents, arg); 4347 cb (revents, arg);
2242} 4348}
2243 4349
2244static void 4350static void
2245once_cb_io (EV_P_ ev_io *w, int revents) 4351once_cb_io (EV_P_ ev_io *w, int revents)
2246{ 4352{
2247 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4353 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4354
4355 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2248} 4356}
2249 4357
2250static void 4358static void
2251once_cb_to (EV_P_ ev_timer *w, int revents) 4359once_cb_to (EV_P_ ev_timer *w, int revents)
2252{ 4360{
2253 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4361 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4362
4363 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2254} 4364}
2255 4365
2256void 4366void
2257ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4367ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2258{ 4368{
2259 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4369 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2260 4370
2261 if (expect_false (!once)) 4371 if (expect_false (!once))
2262 { 4372 {
2263 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4373 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2264 return; 4374 return;
2265 } 4375 }
2266 4376
2267 once->cb = cb; 4377 once->cb = cb;
2268 once->arg = arg; 4378 once->arg = arg;
… …
2280 ev_timer_set (&once->to, timeout, 0.); 4390 ev_timer_set (&once->to, timeout, 0.);
2281 ev_timer_start (EV_A_ &once->to); 4391 ev_timer_start (EV_A_ &once->to);
2282 } 4392 }
2283} 4393}
2284 4394
2285#ifdef __cplusplus 4395/*****************************************************************************/
2286} 4396
4397#if EV_WALK_ENABLE
4398void ecb_cold
4399ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4400{
4401 int i, j;
4402 ev_watcher_list *wl, *wn;
4403
4404 if (types & (EV_IO | EV_EMBED))
4405 for (i = 0; i < anfdmax; ++i)
4406 for (wl = anfds [i].head; wl; )
4407 {
4408 wn = wl->next;
4409
4410#if EV_EMBED_ENABLE
4411 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4412 {
4413 if (types & EV_EMBED)
4414 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4415 }
4416 else
4417#endif
4418#if EV_USE_INOTIFY
4419 if (ev_cb ((ev_io *)wl) == infy_cb)
4420 ;
4421 else
4422#endif
4423 if ((ev_io *)wl != &pipe_w)
4424 if (types & EV_IO)
4425 cb (EV_A_ EV_IO, wl);
4426
4427 wl = wn;
4428 }
4429
4430 if (types & (EV_TIMER | EV_STAT))
4431 for (i = timercnt + HEAP0; i-- > HEAP0; )
4432#if EV_STAT_ENABLE
4433 /*TODO: timer is not always active*/
4434 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4435 {
4436 if (types & EV_STAT)
4437 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4438 }
4439 else
4440#endif
4441 if (types & EV_TIMER)
4442 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4443
4444#if EV_PERIODIC_ENABLE
4445 if (types & EV_PERIODIC)
4446 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4447 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4448#endif
4449
4450#if EV_IDLE_ENABLE
4451 if (types & EV_IDLE)
4452 for (j = NUMPRI; j--; )
4453 for (i = idlecnt [j]; i--; )
4454 cb (EV_A_ EV_IDLE, idles [j][i]);
4455#endif
4456
4457#if EV_FORK_ENABLE
4458 if (types & EV_FORK)
4459 for (i = forkcnt; i--; )
4460 if (ev_cb (forks [i]) != embed_fork_cb)
4461 cb (EV_A_ EV_FORK, forks [i]);
4462#endif
4463
4464#if EV_ASYNC_ENABLE
4465 if (types & EV_ASYNC)
4466 for (i = asynccnt; i--; )
4467 cb (EV_A_ EV_ASYNC, asyncs [i]);
4468#endif
4469
4470#if EV_PREPARE_ENABLE
4471 if (types & EV_PREPARE)
4472 for (i = preparecnt; i--; )
4473# if EV_EMBED_ENABLE
4474 if (ev_cb (prepares [i]) != embed_prepare_cb)
2287#endif 4475# endif
4476 cb (EV_A_ EV_PREPARE, prepares [i]);
4477#endif
2288 4478
4479#if EV_CHECK_ENABLE
4480 if (types & EV_CHECK)
4481 for (i = checkcnt; i--; )
4482 cb (EV_A_ EV_CHECK, checks [i]);
4483#endif
4484
4485#if EV_SIGNAL_ENABLE
4486 if (types & EV_SIGNAL)
4487 for (i = 0; i < EV_NSIG - 1; ++i)
4488 for (wl = signals [i].head; wl; )
4489 {
4490 wn = wl->next;
4491 cb (EV_A_ EV_SIGNAL, wl);
4492 wl = wn;
4493 }
4494#endif
4495
4496#if EV_CHILD_ENABLE
4497 if (types & EV_CHILD)
4498 for (i = (EV_PID_HASHSIZE); i--; )
4499 for (wl = childs [i]; wl; )
4500 {
4501 wn = wl->next;
4502 cb (EV_A_ EV_CHILD, wl);
4503 wl = wn;
4504 }
4505#endif
4506/* EV_STAT 0x00001000 /* stat data changed */
4507/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4508}
4509#endif
4510
4511#if EV_MULTIPLICITY
4512 #include "ev_wrap.h"
4513#endif
4514

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