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Comparing libev/ev.c (file contents):
Revision 1.159 by root, Sat Dec 1 19:48:36 2007 UTC vs.
Revision 1.428 by root, Tue May 8 15:44:09 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
30 */ 38 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 43# include EV_CONFIG_H
39# else 44# else
40# include "config.h" 45# include "config.h"
41# endif 46# endif
42 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
43# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
46# endif 71# endif
47# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
49# endif 74# endif
50# else 75# else
51# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
53# endif 78# endif
54# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
56# endif 81# endif
57# endif 82# endif
58 83
84# if HAVE_NANOSLEEP
59# ifndef EV_USE_SELECT 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif 87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
65# endif 91# endif
66 92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
67# ifndef EV_USE_POLL 94# ifndef EV_USE_SELECT
68# if HAVE_POLL && HAVE_POLL_H 95# define EV_USE_SELECT EV_FEATURE_BACKENDS
69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
73# endif 109# endif
74 110
75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
78# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
79# define EV_USE_EPOLL 0
80# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
81# endif 118# endif
82 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
83# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
89# endif 127# endif
90 128
91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
93# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
94# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
95# define EV_USE_PORT 0
96# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
97# endif 136# endif
98 137
99# ifndef EV_USE_INOTIFY
100# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
101# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
102# else
103# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
104# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
105# endif 145# endif
106 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
107#endif 154# endif
108 155
109#include <math.h> 156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
110#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
111#include <fcntl.h> 169#include <fcntl.h>
112#include <stddef.h> 170#include <stddef.h>
113 171
114#include <stdio.h> 172#include <stdio.h>
115 173
116#include <assert.h> 174#include <assert.h>
117#include <errno.h> 175#include <errno.h>
118#include <sys/types.h> 176#include <sys/types.h>
119#include <time.h> 177#include <time.h>
178#include <limits.h>
120 179
121#include <signal.h> 180#include <signal.h>
122 181
123#ifdef EV_H 182#ifdef EV_H
124# include EV_H 183# include EV_H
125#else 184#else
126# include "ev.h" 185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
127#endif 197#endif
128 198
129#ifndef _WIN32 199#ifndef _WIN32
130# include <sys/time.h> 200# include <sys/time.h>
131# include <sys/wait.h> 201# include <sys/wait.h>
132# include <unistd.h> 202# include <unistd.h>
133#else 203#else
204# include <io.h>
134# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 206# include <windows.h>
207# include <winsock2.h>
136# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
138# endif 210# endif
211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
139#endif 261# endif
140 262#endif
141/**/
142 263
143#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
144# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
269# endif
145#endif 270#endif
146 271
147#ifndef EV_USE_REALTIME 272#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
274#endif
275
276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
280# define EV_USE_NANOSLEEP 0
281# endif
149#endif 282#endif
150 283
151#ifndef EV_USE_SELECT 284#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 286#endif
154 287
155#ifndef EV_USE_POLL 288#ifndef EV_USE_POLL
156# ifdef _WIN32 289# ifdef _WIN32
157# define EV_USE_POLL 0 290# define EV_USE_POLL 0
158# else 291# else
159# define EV_USE_POLL 1 292# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 293# endif
161#endif 294#endif
162 295
163#ifndef EV_USE_EPOLL 296#ifndef EV_USE_EPOLL
297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
299# else
164# define EV_USE_EPOLL 0 300# define EV_USE_EPOLL 0
301# endif
165#endif 302#endif
166 303
167#ifndef EV_USE_KQUEUE 304#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 305# define EV_USE_KQUEUE 0
169#endif 306#endif
… …
171#ifndef EV_USE_PORT 308#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 309# define EV_USE_PORT 0
173#endif 310#endif
174 311
175#ifndef EV_USE_INOTIFY 312#ifndef EV_USE_INOTIFY
313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314# define EV_USE_INOTIFY EV_FEATURE_OS
315# else
176# define EV_USE_INOTIFY 0 316# define EV_USE_INOTIFY 0
317# endif
177#endif 318#endif
178 319
179#ifndef EV_PID_HASHSIZE 320#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 322#endif
323
324#ifndef EV_INOTIFY_HASHSIZE
325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
326#endif
327
328#ifndef EV_USE_EVENTFD
329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
330# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 331# else
183# define EV_PID_HASHSIZE 16 332# define EV_USE_EVENTFD 0
184# endif 333# endif
185#endif 334#endif
186 335
187#ifndef EV_INOTIFY_HASHSIZE 336#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 338# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 339# else
191# define EV_INOTIFY_HASHSIZE 16 340# define EV_USE_SIGNALFD 0
192# endif 341# endif
193#endif 342#endif
194 343
195/**/ 344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
196 383
197#ifndef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 385# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 386# define EV_USE_MONOTONIC 0
200#endif 387#endif
… …
202#ifndef CLOCK_REALTIME 389#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 390# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 391# define EV_USE_REALTIME 0
205#endif 392#endif
206 393
394#if !EV_STAT_ENABLE
395# undef EV_USE_INOTIFY
396# define EV_USE_INOTIFY 0
397#endif
398
399#if !EV_USE_NANOSLEEP
400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
402# include <sys/select.h>
403# endif
404#endif
405
406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
413# endif
414#endif
415
207#if EV_SELECT_IS_WINSOCKET 416#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 417# include <winsock.h>
209#endif 418#endif
210 419
211#if !EV_STAT_ENABLE 420#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 421/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
422# include <stdint.h>
423# ifndef EFD_NONBLOCK
424# define EFD_NONBLOCK O_NONBLOCK
213#endif 425# endif
426# ifndef EFD_CLOEXEC
427# ifdef O_CLOEXEC
428# define EFD_CLOEXEC O_CLOEXEC
429# else
430# define EFD_CLOEXEC 02000000
431# endif
432# endif
433EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
434#endif
214 435
215#if EV_USE_INOTIFY 436#if EV_USE_SIGNALFD
437/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
216# include <sys/inotify.h> 438# include <stdint.h>
439# ifndef SFD_NONBLOCK
440# define SFD_NONBLOCK O_NONBLOCK
441# endif
442# ifndef SFD_CLOEXEC
443# ifdef O_CLOEXEC
444# define SFD_CLOEXEC O_CLOEXEC
445# else
446# define SFD_CLOEXEC 02000000
447# endif
448# endif
449EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
450
451struct signalfd_siginfo
452{
453 uint32_t ssi_signo;
454 char pad[128 - sizeof (uint32_t)];
455};
217#endif 456#endif
218 457
219/**/ 458/**/
459
460#if EV_VERIFY >= 3
461# define EV_FREQUENT_CHECK ev_verify (EV_A)
462#else
463# define EV_FREQUENT_CHECK do { } while (0)
464#endif
465
466/*
467 * This is used to work around floating point rounding problems.
468 * This value is good at least till the year 4000.
469 */
470#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
471/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
220 472
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 473#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 474#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
224 475
476#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
477#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
478
479/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
480/* ECB.H BEGIN */
481/*
482 * libecb - http://software.schmorp.de/pkg/libecb
483 *
484 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
485 * Copyright (©) 2011 Emanuele Giaquinta
486 * All rights reserved.
487 *
488 * Redistribution and use in source and binary forms, with or without modifica-
489 * tion, are permitted provided that the following conditions are met:
490 *
491 * 1. Redistributions of source code must retain the above copyright notice,
492 * this list of conditions and the following disclaimer.
493 *
494 * 2. Redistributions in binary form must reproduce the above copyright
495 * notice, this list of conditions and the following disclaimer in the
496 * documentation and/or other materials provided with the distribution.
497 *
498 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
499 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
500 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
501 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
502 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
503 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
504 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
505 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
506 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
507 * OF THE POSSIBILITY OF SUCH DAMAGE.
508 */
509
510#ifndef ECB_H
511#define ECB_H
512
513#ifdef _WIN32
514 typedef signed char int8_t;
515 typedef unsigned char uint8_t;
516 typedef signed short int16_t;
517 typedef unsigned short uint16_t;
518 typedef signed int int32_t;
519 typedef unsigned int uint32_t;
225#if __GNUC__ >= 3 520 #if __GNUC__
226# define expect(expr,value) __builtin_expect ((expr),(value)) 521 typedef signed long long int64_t;
227# define inline_size static inline /* inline for codesize */ 522 typedef unsigned long long uint64_t;
228# if EV_MINIMAL 523 #else /* _MSC_VER || __BORLANDC__ */
229# define noinline __attribute__ ((noinline)) 524 typedef signed __int64 int64_t;
230# define inline_speed static noinline 525 typedef unsigned __int64 uint64_t;
231# else
232# define noinline
233# define inline_speed static inline
234# endif 526 #endif
235#else 527#else
528 #include <inttypes.h>
529#endif
530
531/* many compilers define _GNUC_ to some versions but then only implement
532 * what their idiot authors think are the "more important" extensions,
533 * causing enormous grief in return for some better fake benchmark numbers.
534 * or so.
535 * we try to detect these and simply assume they are not gcc - if they have
536 * an issue with that they should have done it right in the first place.
537 */
538#ifndef ECB_GCC_VERSION
539 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
540 #define ECB_GCC_VERSION(major,minor) 0
541 #else
542 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
543 #endif
544#endif
545
546/*****************************************************************************/
547
548/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
549/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
550
551#if ECB_NO_THREADS
552# define ECB_NO_SMP 1
553#endif
554
555#if ECB_NO_THREADS || ECB_NO_SMP
556 #define ECB_MEMORY_FENCE do { } while (0)
557#endif
558
559#ifndef ECB_MEMORY_FENCE
560 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
561 #if __i386 || __i386__
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
563 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
564 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
565 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
566 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
568 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
569 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
570 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
571 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
572 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
573 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
574 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
575 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
576 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
577 #elif __sparc || __sparc__
578 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
579 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
580 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
581 #elif defined __s390__ || defined __s390x__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
583 #elif defined __mips__
584 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
585 #elif defined __alpha__
586 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
587 #endif
588 #endif
589#endif
590
591#ifndef ECB_MEMORY_FENCE
592 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
593 #define ECB_MEMORY_FENCE __sync_synchronize ()
594 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
595 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
596 #elif _MSC_VER >= 1400 /* VC++ 2005 */
597 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
598 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
599 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
600 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
601 #elif defined _WIN32
602 #include <WinNT.h>
603 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
604 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
605 #include <mbarrier.h>
606 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
607 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
608 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
609 #elif __xlC__
610 #define ECB_MEMORY_FENCE __sync ()
611 #endif
612#endif
613
614#ifndef ECB_MEMORY_FENCE
615 #if !ECB_AVOID_PTHREADS
616 /*
617 * if you get undefined symbol references to pthread_mutex_lock,
618 * or failure to find pthread.h, then you should implement
619 * the ECB_MEMORY_FENCE operations for your cpu/compiler
620 * OR provide pthread.h and link against the posix thread library
621 * of your system.
622 */
623 #include <pthread.h>
624 #define ECB_NEEDS_PTHREADS 1
625 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
626
627 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
628 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
629 #endif
630#endif
631
632#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
633 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
634#endif
635
636#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
637 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
638#endif
639
640/*****************************************************************************/
641
642#define ECB_C99 (__STDC_VERSION__ >= 199901L)
643
644#if __cplusplus
645 #define ecb_inline static inline
646#elif ECB_GCC_VERSION(2,5)
647 #define ecb_inline static __inline__
648#elif ECB_C99
649 #define ecb_inline static inline
650#else
651 #define ecb_inline static
652#endif
653
654#if ECB_GCC_VERSION(3,3)
655 #define ecb_restrict __restrict__
656#elif ECB_C99
657 #define ecb_restrict restrict
658#else
659 #define ecb_restrict
660#endif
661
662typedef int ecb_bool;
663
664#define ECB_CONCAT_(a, b) a ## b
665#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
666#define ECB_STRINGIFY_(a) # a
667#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
668
669#define ecb_function_ ecb_inline
670
671#if ECB_GCC_VERSION(3,1)
672 #define ecb_attribute(attrlist) __attribute__(attrlist)
673 #define ecb_is_constant(expr) __builtin_constant_p (expr)
674 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
675 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
676#else
677 #define ecb_attribute(attrlist)
678 #define ecb_is_constant(expr) 0
236# define expect(expr,value) (expr) 679 #define ecb_expect(expr,value) (expr)
237# define inline_speed static 680 #define ecb_prefetch(addr,rw,locality)
238# define inline_size static
239# define noinline
240#endif 681#endif
241 682
683/* no emulation for ecb_decltype */
684#if ECB_GCC_VERSION(4,5)
685 #define ecb_decltype(x) __decltype(x)
686#elif ECB_GCC_VERSION(3,0)
687 #define ecb_decltype(x) __typeof(x)
688#endif
689
690#define ecb_noinline ecb_attribute ((__noinline__))
691#define ecb_noreturn ecb_attribute ((__noreturn__))
692#define ecb_unused ecb_attribute ((__unused__))
693#define ecb_const ecb_attribute ((__const__))
694#define ecb_pure ecb_attribute ((__pure__))
695
696#if ECB_GCC_VERSION(4,3)
697 #define ecb_artificial ecb_attribute ((__artificial__))
698 #define ecb_hot ecb_attribute ((__hot__))
699 #define ecb_cold ecb_attribute ((__cold__))
700#else
701 #define ecb_artificial
702 #define ecb_hot
703 #define ecb_cold
704#endif
705
706/* put around conditional expressions if you are very sure that the */
707/* expression is mostly true or mostly false. note that these return */
708/* booleans, not the expression. */
242#define expect_false(expr) expect ((expr) != 0, 0) 709#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
243#define expect_true(expr) expect ((expr) != 0, 1) 710#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
711/* for compatibility to the rest of the world */
712#define ecb_likely(expr) ecb_expect_true (expr)
713#define ecb_unlikely(expr) ecb_expect_false (expr)
244 714
715/* count trailing zero bits and count # of one bits */
716#if ECB_GCC_VERSION(3,4)
717 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
718 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
719 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
720 #define ecb_ctz32(x) __builtin_ctz (x)
721 #define ecb_ctz64(x) __builtin_ctzll (x)
722 #define ecb_popcount32(x) __builtin_popcount (x)
723 /* no popcountll */
724#else
725 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
726 ecb_function_ int
727 ecb_ctz32 (uint32_t x)
728 {
729 int r = 0;
730
731 x &= ~x + 1; /* this isolates the lowest bit */
732
733#if ECB_branchless_on_i386
734 r += !!(x & 0xaaaaaaaa) << 0;
735 r += !!(x & 0xcccccccc) << 1;
736 r += !!(x & 0xf0f0f0f0) << 2;
737 r += !!(x & 0xff00ff00) << 3;
738 r += !!(x & 0xffff0000) << 4;
739#else
740 if (x & 0xaaaaaaaa) r += 1;
741 if (x & 0xcccccccc) r += 2;
742 if (x & 0xf0f0f0f0) r += 4;
743 if (x & 0xff00ff00) r += 8;
744 if (x & 0xffff0000) r += 16;
745#endif
746
747 return r;
748 }
749
750 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
751 ecb_function_ int
752 ecb_ctz64 (uint64_t x)
753 {
754 int shift = x & 0xffffffffU ? 0 : 32;
755 return ecb_ctz32 (x >> shift) + shift;
756 }
757
758 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
759 ecb_function_ int
760 ecb_popcount32 (uint32_t x)
761 {
762 x -= (x >> 1) & 0x55555555;
763 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
764 x = ((x >> 4) + x) & 0x0f0f0f0f;
765 x *= 0x01010101;
766
767 return x >> 24;
768 }
769
770 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
771 ecb_function_ int ecb_ld32 (uint32_t x)
772 {
773 int r = 0;
774
775 if (x >> 16) { x >>= 16; r += 16; }
776 if (x >> 8) { x >>= 8; r += 8; }
777 if (x >> 4) { x >>= 4; r += 4; }
778 if (x >> 2) { x >>= 2; r += 2; }
779 if (x >> 1) { r += 1; }
780
781 return r;
782 }
783
784 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
785 ecb_function_ int ecb_ld64 (uint64_t x)
786 {
787 int r = 0;
788
789 if (x >> 32) { x >>= 32; r += 32; }
790
791 return r + ecb_ld32 (x);
792 }
793#endif
794
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
796ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
797{
798 return ( (x * 0x0802U & 0x22110U)
799 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
800}
801
802ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
803ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
804{
805 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
806 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
807 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
808 x = ( x >> 8 ) | ( x << 8);
809
810 return x;
811}
812
813ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
814ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
815{
816 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
817 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
818 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
819 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
820 x = ( x >> 16 ) | ( x << 16);
821
822 return x;
823}
824
825/* popcount64 is only available on 64 bit cpus as gcc builtin */
826/* so for this version we are lazy */
827ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
828ecb_function_ int
829ecb_popcount64 (uint64_t x)
830{
831 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
832}
833
834ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
835ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
836ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
837ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
838ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
839ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
840ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
841ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
842
843ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
844ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
845ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
846ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
847ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
848ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
849ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
850ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
851
852#if ECB_GCC_VERSION(4,3)
853 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
854 #define ecb_bswap32(x) __builtin_bswap32 (x)
855 #define ecb_bswap64(x) __builtin_bswap64 (x)
856#else
857 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
858 ecb_function_ uint16_t
859 ecb_bswap16 (uint16_t x)
860 {
861 return ecb_rotl16 (x, 8);
862 }
863
864 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
865 ecb_function_ uint32_t
866 ecb_bswap32 (uint32_t x)
867 {
868 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
869 }
870
871 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
872 ecb_function_ uint64_t
873 ecb_bswap64 (uint64_t x)
874 {
875 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
876 }
877#endif
878
879#if ECB_GCC_VERSION(4,5)
880 #define ecb_unreachable() __builtin_unreachable ()
881#else
882 /* this seems to work fine, but gcc always emits a warning for it :/ */
883 ecb_inline void ecb_unreachable (void) ecb_noreturn;
884 ecb_inline void ecb_unreachable (void) { }
885#endif
886
887/* try to tell the compiler that some condition is definitely true */
888#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
889
890ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
891ecb_inline unsigned char
892ecb_byteorder_helper (void)
893{
894 const uint32_t u = 0x11223344;
895 return *(unsigned char *)&u;
896}
897
898ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
899ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
900ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
901ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
902
903#if ECB_GCC_VERSION(3,0) || ECB_C99
904 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
905#else
906 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
907#endif
908
909#if __cplusplus
910 template<typename T>
911 static inline T ecb_div_rd (T val, T div)
912 {
913 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
914 }
915 template<typename T>
916 static inline T ecb_div_ru (T val, T div)
917 {
918 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
919 }
920#else
921 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
922 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
923#endif
924
925#if ecb_cplusplus_does_not_suck
926 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
927 template<typename T, int N>
928 static inline int ecb_array_length (const T (&arr)[N])
929 {
930 return N;
931 }
932#else
933 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
934#endif
935
936#endif
937
938/* ECB.H END */
939
940#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
941/* if your architecture doesn't need memory fences, e.g. because it is
942 * single-cpu/core, or if you use libev in a project that doesn't use libev
943 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
944 * libev, in which cases the memory fences become nops.
945 * alternatively, you can remove this #error and link against libpthread,
946 * which will then provide the memory fences.
947 */
948# error "memory fences not defined for your architecture, please report"
949#endif
950
951#ifndef ECB_MEMORY_FENCE
952# define ECB_MEMORY_FENCE do { } while (0)
953# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
954# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
955#endif
956
957#define expect_false(cond) ecb_expect_false (cond)
958#define expect_true(cond) ecb_expect_true (cond)
959#define noinline ecb_noinline
960
961#define inline_size ecb_inline
962
963#if EV_FEATURE_CODE
964# define inline_speed ecb_inline
965#else
966# define inline_speed static noinline
967#endif
968
245#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 969#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
970
971#if EV_MINPRI == EV_MAXPRI
972# define ABSPRI(w) (((W)w), 0)
973#else
246#define ABSPRI(w) ((w)->priority - EV_MINPRI) 974# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
975#endif
247 976
248#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 977#define EMPTY /* required for microsofts broken pseudo-c compiler */
249#define EMPTY2(a,b) /* used to suppress some warnings */ 978#define EMPTY2(a,b) /* used to suppress some warnings */
250 979
251typedef ev_watcher *W; 980typedef ev_watcher *W;
252typedef ev_watcher_list *WL; 981typedef ev_watcher_list *WL;
253typedef ev_watcher_time *WT; 982typedef ev_watcher_time *WT;
254 983
984#define ev_active(w) ((W)(w))->active
985#define ev_at(w) ((WT)(w))->at
986
987#if EV_USE_REALTIME
988/* sig_atomic_t is used to avoid per-thread variables or locking but still */
989/* giving it a reasonably high chance of working on typical architectures */
990static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
991#endif
992
993#if EV_USE_MONOTONIC
255static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 994static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
995#endif
996
997#ifndef EV_FD_TO_WIN32_HANDLE
998# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
999#endif
1000#ifndef EV_WIN32_HANDLE_TO_FD
1001# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1002#endif
1003#ifndef EV_WIN32_CLOSE_FD
1004# define EV_WIN32_CLOSE_FD(fd) close (fd)
1005#endif
256 1006
257#ifdef _WIN32 1007#ifdef _WIN32
258# include "ev_win32.c" 1008# include "ev_win32.c"
259#endif 1009#endif
260 1010
261/*****************************************************************************/ 1011/*****************************************************************************/
262 1012
1013/* define a suitable floor function (only used by periodics atm) */
1014
1015#if EV_USE_FLOOR
1016# include <math.h>
1017# define ev_floor(v) floor (v)
1018#else
1019
1020#include <float.h>
1021
1022/* a floor() replacement function, should be independent of ev_tstamp type */
1023static ev_tstamp noinline
1024ev_floor (ev_tstamp v)
1025{
1026 /* the choice of shift factor is not terribly important */
1027#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1028 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1029#else
1030 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1031#endif
1032
1033 /* argument too large for an unsigned long? */
1034 if (expect_false (v >= shift))
1035 {
1036 ev_tstamp f;
1037
1038 if (v == v - 1.)
1039 return v; /* very large number */
1040
1041 f = shift * ev_floor (v * (1. / shift));
1042 return f + ev_floor (v - f);
1043 }
1044
1045 /* special treatment for negative args? */
1046 if (expect_false (v < 0.))
1047 {
1048 ev_tstamp f = -ev_floor (-v);
1049
1050 return f - (f == v ? 0 : 1);
1051 }
1052
1053 /* fits into an unsigned long */
1054 return (unsigned long)v;
1055}
1056
1057#endif
1058
1059/*****************************************************************************/
1060
1061#ifdef __linux
1062# include <sys/utsname.h>
1063#endif
1064
1065static unsigned int noinline ecb_cold
1066ev_linux_version (void)
1067{
1068#ifdef __linux
1069 unsigned int v = 0;
1070 struct utsname buf;
1071 int i;
1072 char *p = buf.release;
1073
1074 if (uname (&buf))
1075 return 0;
1076
1077 for (i = 3+1; --i; )
1078 {
1079 unsigned int c = 0;
1080
1081 for (;;)
1082 {
1083 if (*p >= '0' && *p <= '9')
1084 c = c * 10 + *p++ - '0';
1085 else
1086 {
1087 p += *p == '.';
1088 break;
1089 }
1090 }
1091
1092 v = (v << 8) | c;
1093 }
1094
1095 return v;
1096#else
1097 return 0;
1098#endif
1099}
1100
1101/*****************************************************************************/
1102
1103#if EV_AVOID_STDIO
1104static void noinline ecb_cold
1105ev_printerr (const char *msg)
1106{
1107 write (STDERR_FILENO, msg, strlen (msg));
1108}
1109#endif
1110
263static void (*syserr_cb)(const char *msg); 1111static void (*syserr_cb)(const char *msg) EV_THROW;
264 1112
265void 1113void ecb_cold
266ev_set_syserr_cb (void (*cb)(const char *msg)) 1114ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
267{ 1115{
268 syserr_cb = cb; 1116 syserr_cb = cb;
269} 1117}
270 1118
271static void noinline 1119static void noinline ecb_cold
272syserr (const char *msg) 1120ev_syserr (const char *msg)
273{ 1121{
274 if (!msg) 1122 if (!msg)
275 msg = "(libev) system error"; 1123 msg = "(libev) system error";
276 1124
277 if (syserr_cb) 1125 if (syserr_cb)
278 syserr_cb (msg); 1126 syserr_cb (msg);
279 else 1127 else
280 { 1128 {
1129#if EV_AVOID_STDIO
1130 ev_printerr (msg);
1131 ev_printerr (": ");
1132 ev_printerr (strerror (errno));
1133 ev_printerr ("\n");
1134#else
281 perror (msg); 1135 perror (msg);
1136#endif
282 abort (); 1137 abort ();
283 } 1138 }
284} 1139}
285 1140
1141static void *
1142ev_realloc_emul (void *ptr, long size)
1143{
1144#if __GLIBC__
1145 return realloc (ptr, size);
1146#else
1147 /* some systems, notably openbsd and darwin, fail to properly
1148 * implement realloc (x, 0) (as required by both ansi c-89 and
1149 * the single unix specification, so work around them here.
1150 */
1151
1152 if (size)
1153 return realloc (ptr, size);
1154
1155 free (ptr);
1156 return 0;
1157#endif
1158}
1159
286static void *(*alloc)(void *ptr, long size); 1160static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
287 1161
288void 1162void ecb_cold
289ev_set_allocator (void *(*cb)(void *ptr, long size)) 1163ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
290{ 1164{
291 alloc = cb; 1165 alloc = cb;
292} 1166}
293 1167
294inline_speed void * 1168inline_speed void *
295ev_realloc (void *ptr, long size) 1169ev_realloc (void *ptr, long size)
296{ 1170{
297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1171 ptr = alloc (ptr, size);
298 1172
299 if (!ptr && size) 1173 if (!ptr && size)
300 { 1174 {
1175#if EV_AVOID_STDIO
1176 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1177#else
301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1178 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1179#endif
302 abort (); 1180 abort ();
303 } 1181 }
304 1182
305 return ptr; 1183 return ptr;
306} 1184}
… …
308#define ev_malloc(size) ev_realloc (0, (size)) 1186#define ev_malloc(size) ev_realloc (0, (size))
309#define ev_free(ptr) ev_realloc ((ptr), 0) 1187#define ev_free(ptr) ev_realloc ((ptr), 0)
310 1188
311/*****************************************************************************/ 1189/*****************************************************************************/
312 1190
1191/* set in reify when reification needed */
1192#define EV_ANFD_REIFY 1
1193
1194/* file descriptor info structure */
313typedef struct 1195typedef struct
314{ 1196{
315 WL head; 1197 WL head;
316 unsigned char events; 1198 unsigned char events; /* the events watched for */
1199 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1200 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
317 unsigned char reify; 1201 unsigned char unused;
1202#if EV_USE_EPOLL
1203 unsigned int egen; /* generation counter to counter epoll bugs */
1204#endif
318#if EV_SELECT_IS_WINSOCKET 1205#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
319 SOCKET handle; 1206 SOCKET handle;
320#endif 1207#endif
1208#if EV_USE_IOCP
1209 OVERLAPPED or, ow;
1210#endif
321} ANFD; 1211} ANFD;
322 1212
1213/* stores the pending event set for a given watcher */
323typedef struct 1214typedef struct
324{ 1215{
325 W w; 1216 W w;
326 int events; 1217 int events; /* the pending event set for the given watcher */
327} ANPENDING; 1218} ANPENDING;
328 1219
329#if EV_USE_INOTIFY 1220#if EV_USE_INOTIFY
1221/* hash table entry per inotify-id */
330typedef struct 1222typedef struct
331{ 1223{
332 WL head; 1224 WL head;
333} ANFS; 1225} ANFS;
1226#endif
1227
1228/* Heap Entry */
1229#if EV_HEAP_CACHE_AT
1230 /* a heap element */
1231 typedef struct {
1232 ev_tstamp at;
1233 WT w;
1234 } ANHE;
1235
1236 #define ANHE_w(he) (he).w /* access watcher, read-write */
1237 #define ANHE_at(he) (he).at /* access cached at, read-only */
1238 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1239#else
1240 /* a heap element */
1241 typedef WT ANHE;
1242
1243 #define ANHE_w(he) (he)
1244 #define ANHE_at(he) (he)->at
1245 #define ANHE_at_cache(he)
334#endif 1246#endif
335 1247
336#if EV_MULTIPLICITY 1248#if EV_MULTIPLICITY
337 1249
338 struct ev_loop 1250 struct ev_loop
… …
344 #undef VAR 1256 #undef VAR
345 }; 1257 };
346 #include "ev_wrap.h" 1258 #include "ev_wrap.h"
347 1259
348 static struct ev_loop default_loop_struct; 1260 static struct ev_loop default_loop_struct;
349 struct ev_loop *ev_default_loop_ptr; 1261 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
350 1262
351#else 1263#else
352 1264
353 ev_tstamp ev_rt_now; 1265 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
354 #define VAR(name,decl) static decl; 1266 #define VAR(name,decl) static decl;
355 #include "ev_vars.h" 1267 #include "ev_vars.h"
356 #undef VAR 1268 #undef VAR
357 1269
358 static int ev_default_loop_ptr; 1270 static int ev_default_loop_ptr;
359 1271
360#endif 1272#endif
361 1273
1274#if EV_FEATURE_API
1275# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1276# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1277# define EV_INVOKE_PENDING invoke_cb (EV_A)
1278#else
1279# define EV_RELEASE_CB (void)0
1280# define EV_ACQUIRE_CB (void)0
1281# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1282#endif
1283
1284#define EVBREAK_RECURSE 0x80
1285
362/*****************************************************************************/ 1286/*****************************************************************************/
363 1287
1288#ifndef EV_HAVE_EV_TIME
364ev_tstamp 1289ev_tstamp
365ev_time (void) 1290ev_time (void) EV_THROW
366{ 1291{
367#if EV_USE_REALTIME 1292#if EV_USE_REALTIME
1293 if (expect_true (have_realtime))
1294 {
368 struct timespec ts; 1295 struct timespec ts;
369 clock_gettime (CLOCK_REALTIME, &ts); 1296 clock_gettime (CLOCK_REALTIME, &ts);
370 return ts.tv_sec + ts.tv_nsec * 1e-9; 1297 return ts.tv_sec + ts.tv_nsec * 1e-9;
371#else 1298 }
1299#endif
1300
372 struct timeval tv; 1301 struct timeval tv;
373 gettimeofday (&tv, 0); 1302 gettimeofday (&tv, 0);
374 return tv.tv_sec + tv.tv_usec * 1e-6; 1303 return tv.tv_sec + tv.tv_usec * 1e-6;
375#endif
376} 1304}
1305#endif
377 1306
378ev_tstamp inline_size 1307inline_size ev_tstamp
379get_clock (void) 1308get_clock (void)
380{ 1309{
381#if EV_USE_MONOTONIC 1310#if EV_USE_MONOTONIC
382 if (expect_true (have_monotonic)) 1311 if (expect_true (have_monotonic))
383 { 1312 {
… …
390 return ev_time (); 1319 return ev_time ();
391} 1320}
392 1321
393#if EV_MULTIPLICITY 1322#if EV_MULTIPLICITY
394ev_tstamp 1323ev_tstamp
395ev_now (EV_P) 1324ev_now (EV_P) EV_THROW
396{ 1325{
397 return ev_rt_now; 1326 return ev_rt_now;
398} 1327}
399#endif 1328#endif
400 1329
401#define array_roundsize(type,n) (((n) | 4) & ~3) 1330void
1331ev_sleep (ev_tstamp delay) EV_THROW
1332{
1333 if (delay > 0.)
1334 {
1335#if EV_USE_NANOSLEEP
1336 struct timespec ts;
1337
1338 EV_TS_SET (ts, delay);
1339 nanosleep (&ts, 0);
1340#elif defined _WIN32
1341 Sleep ((unsigned long)(delay * 1e3));
1342#else
1343 struct timeval tv;
1344
1345 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1346 /* something not guaranteed by newer posix versions, but guaranteed */
1347 /* by older ones */
1348 EV_TV_SET (tv, delay);
1349 select (0, 0, 0, 0, &tv);
1350#endif
1351 }
1352}
1353
1354/*****************************************************************************/
1355
1356#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1357
1358/* find a suitable new size for the given array, */
1359/* hopefully by rounding to a nice-to-malloc size */
1360inline_size int
1361array_nextsize (int elem, int cur, int cnt)
1362{
1363 int ncur = cur + 1;
1364
1365 do
1366 ncur <<= 1;
1367 while (cnt > ncur);
1368
1369 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1370 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1371 {
1372 ncur *= elem;
1373 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1374 ncur = ncur - sizeof (void *) * 4;
1375 ncur /= elem;
1376 }
1377
1378 return ncur;
1379}
1380
1381static void * noinline ecb_cold
1382array_realloc (int elem, void *base, int *cur, int cnt)
1383{
1384 *cur = array_nextsize (elem, *cur, cnt);
1385 return ev_realloc (base, elem * *cur);
1386}
1387
1388#define array_init_zero(base,count) \
1389 memset ((void *)(base), 0, sizeof (*(base)) * (count))
402 1390
403#define array_needsize(type,base,cur,cnt,init) \ 1391#define array_needsize(type,base,cur,cnt,init) \
404 if (expect_false ((cnt) > cur)) \ 1392 if (expect_false ((cnt) > (cur))) \
405 { \ 1393 { \
406 int newcnt = cur; \ 1394 int ecb_unused ocur_ = (cur); \
407 do \ 1395 (base) = (type *)array_realloc \
408 { \ 1396 (sizeof (type), (base), &(cur), (cnt)); \
409 newcnt = array_roundsize (type, newcnt << 1); \ 1397 init ((base) + (ocur_), (cur) - ocur_); \
410 } \
411 while ((cnt) > newcnt); \
412 \
413 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
414 init (base + cur, newcnt - cur); \
415 cur = newcnt; \
416 } 1398 }
417 1399
1400#if 0
418#define array_slim(type,stem) \ 1401#define array_slim(type,stem) \
419 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1402 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
420 { \ 1403 { \
421 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1404 stem ## max = array_roundsize (stem ## cnt >> 1); \
422 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1405 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
423 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1406 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
424 } 1407 }
1408#endif
425 1409
426#define array_free(stem, idx) \ 1410#define array_free(stem, idx) \
427 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1411 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
428 1412
429/*****************************************************************************/ 1413/*****************************************************************************/
430 1414
1415/* dummy callback for pending events */
1416static void noinline
1417pendingcb (EV_P_ ev_prepare *w, int revents)
1418{
1419}
1420
431void noinline 1421void noinline
432ev_feed_event (EV_P_ void *w, int revents) 1422ev_feed_event (EV_P_ void *w, int revents) EV_THROW
433{ 1423{
434 W w_ = (W)w; 1424 W w_ = (W)w;
1425 int pri = ABSPRI (w_);
435 1426
436 if (expect_false (w_->pending)) 1427 if (expect_false (w_->pending))
1428 pendings [pri][w_->pending - 1].events |= revents;
1429 else
437 { 1430 {
1431 w_->pending = ++pendingcnt [pri];
1432 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1433 pendings [pri][w_->pending - 1].w = w_;
438 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1434 pendings [pri][w_->pending - 1].events = revents;
439 return;
440 } 1435 }
441 1436
442 w_->pending = ++pendingcnt [ABSPRI (w_)]; 1437 pendingpri = NUMPRI - 1;
443 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
444 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
445 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
446} 1438}
447 1439
448void inline_size 1440inline_speed void
1441feed_reverse (EV_P_ W w)
1442{
1443 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1444 rfeeds [rfeedcnt++] = w;
1445}
1446
1447inline_size void
1448feed_reverse_done (EV_P_ int revents)
1449{
1450 do
1451 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1452 while (rfeedcnt);
1453}
1454
1455inline_speed void
449queue_events (EV_P_ W *events, int eventcnt, int type) 1456queue_events (EV_P_ W *events, int eventcnt, int type)
450{ 1457{
451 int i; 1458 int i;
452 1459
453 for (i = 0; i < eventcnt; ++i) 1460 for (i = 0; i < eventcnt; ++i)
454 ev_feed_event (EV_A_ events [i], type); 1461 ev_feed_event (EV_A_ events [i], type);
455} 1462}
456 1463
457/*****************************************************************************/ 1464/*****************************************************************************/
458 1465
459void inline_size 1466inline_speed void
460anfds_init (ANFD *base, int count)
461{
462 while (count--)
463 {
464 base->head = 0;
465 base->events = EV_NONE;
466 base->reify = 0;
467
468 ++base;
469 }
470}
471
472void inline_speed
473fd_event (EV_P_ int fd, int revents) 1467fd_event_nocheck (EV_P_ int fd, int revents)
474{ 1468{
475 ANFD *anfd = anfds + fd; 1469 ANFD *anfd = anfds + fd;
476 ev_io *w; 1470 ev_io *w;
477 1471
478 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1472 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
482 if (ev) 1476 if (ev)
483 ev_feed_event (EV_A_ (W)w, ev); 1477 ev_feed_event (EV_A_ (W)w, ev);
484 } 1478 }
485} 1479}
486 1480
1481/* do not submit kernel events for fds that have reify set */
1482/* because that means they changed while we were polling for new events */
1483inline_speed void
1484fd_event (EV_P_ int fd, int revents)
1485{
1486 ANFD *anfd = anfds + fd;
1487
1488 if (expect_true (!anfd->reify))
1489 fd_event_nocheck (EV_A_ fd, revents);
1490}
1491
487void 1492void
488ev_feed_fd_event (EV_P_ int fd, int revents) 1493ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
489{ 1494{
1495 if (fd >= 0 && fd < anfdmax)
490 fd_event (EV_A_ fd, revents); 1496 fd_event_nocheck (EV_A_ fd, revents);
491} 1497}
492 1498
493void inline_size 1499/* make sure the external fd watch events are in-sync */
1500/* with the kernel/libev internal state */
1501inline_size void
494fd_reify (EV_P) 1502fd_reify (EV_P)
495{ 1503{
496 int i; 1504 int i;
1505
1506#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1507 for (i = 0; i < fdchangecnt; ++i)
1508 {
1509 int fd = fdchanges [i];
1510 ANFD *anfd = anfds + fd;
1511
1512 if (anfd->reify & EV__IOFDSET && anfd->head)
1513 {
1514 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1515
1516 if (handle != anfd->handle)
1517 {
1518 unsigned long arg;
1519
1520 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1521
1522 /* handle changed, but fd didn't - we need to do it in two steps */
1523 backend_modify (EV_A_ fd, anfd->events, 0);
1524 anfd->events = 0;
1525 anfd->handle = handle;
1526 }
1527 }
1528 }
1529#endif
497 1530
498 for (i = 0; i < fdchangecnt; ++i) 1531 for (i = 0; i < fdchangecnt; ++i)
499 { 1532 {
500 int fd = fdchanges [i]; 1533 int fd = fdchanges [i];
501 ANFD *anfd = anfds + fd; 1534 ANFD *anfd = anfds + fd;
502 ev_io *w; 1535 ev_io *w;
503 1536
504 int events = 0; 1537 unsigned char o_events = anfd->events;
1538 unsigned char o_reify = anfd->reify;
505 1539
506 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1540 anfd->reify = 0;
507 events |= w->events;
508 1541
509#if EV_SELECT_IS_WINSOCKET 1542 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
510 if (events)
511 { 1543 {
512 unsigned long argp; 1544 anfd->events = 0;
513 anfd->handle = _get_osfhandle (fd); 1545
514 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1546 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1547 anfd->events |= (unsigned char)w->events;
1548
1549 if (o_events != anfd->events)
1550 o_reify = EV__IOFDSET; /* actually |= */
515 } 1551 }
516#endif
517 1552
518 anfd->reify = 0; 1553 if (o_reify & EV__IOFDSET)
519
520 backend_modify (EV_A_ fd, anfd->events, events); 1554 backend_modify (EV_A_ fd, o_events, anfd->events);
521 anfd->events = events;
522 } 1555 }
523 1556
524 fdchangecnt = 0; 1557 fdchangecnt = 0;
525} 1558}
526 1559
527void inline_size 1560/* something about the given fd changed */
1561inline_size void
528fd_change (EV_P_ int fd) 1562fd_change (EV_P_ int fd, int flags)
529{ 1563{
530 if (expect_false (anfds [fd].reify)) 1564 unsigned char reify = anfds [fd].reify;
531 return;
532
533 anfds [fd].reify = 1; 1565 anfds [fd].reify |= flags;
534 1566
1567 if (expect_true (!reify))
1568 {
535 ++fdchangecnt; 1569 ++fdchangecnt;
536 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1570 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
537 fdchanges [fdchangecnt - 1] = fd; 1571 fdchanges [fdchangecnt - 1] = fd;
1572 }
538} 1573}
539 1574
540void inline_speed 1575/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1576inline_speed void ecb_cold
541fd_kill (EV_P_ int fd) 1577fd_kill (EV_P_ int fd)
542{ 1578{
543 ev_io *w; 1579 ev_io *w;
544 1580
545 while ((w = (ev_io *)anfds [fd].head)) 1581 while ((w = (ev_io *)anfds [fd].head))
… …
547 ev_io_stop (EV_A_ w); 1583 ev_io_stop (EV_A_ w);
548 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1584 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
549 } 1585 }
550} 1586}
551 1587
552int inline_size 1588/* check whether the given fd is actually valid, for error recovery */
1589inline_size int ecb_cold
553fd_valid (int fd) 1590fd_valid (int fd)
554{ 1591{
555#ifdef _WIN32 1592#ifdef _WIN32
556 return _get_osfhandle (fd) != -1; 1593 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
557#else 1594#else
558 return fcntl (fd, F_GETFD) != -1; 1595 return fcntl (fd, F_GETFD) != -1;
559#endif 1596#endif
560} 1597}
561 1598
562/* called on EBADF to verify fds */ 1599/* called on EBADF to verify fds */
563static void noinline 1600static void noinline ecb_cold
564fd_ebadf (EV_P) 1601fd_ebadf (EV_P)
565{ 1602{
566 int fd; 1603 int fd;
567 1604
568 for (fd = 0; fd < anfdmax; ++fd) 1605 for (fd = 0; fd < anfdmax; ++fd)
569 if (anfds [fd].events) 1606 if (anfds [fd].events)
570 if (!fd_valid (fd) == -1 && errno == EBADF) 1607 if (!fd_valid (fd) && errno == EBADF)
571 fd_kill (EV_A_ fd); 1608 fd_kill (EV_A_ fd);
572} 1609}
573 1610
574/* called on ENOMEM in select/poll to kill some fds and retry */ 1611/* called on ENOMEM in select/poll to kill some fds and retry */
575static void noinline 1612static void noinline ecb_cold
576fd_enomem (EV_P) 1613fd_enomem (EV_P)
577{ 1614{
578 int fd; 1615 int fd;
579 1616
580 for (fd = anfdmax; fd--; ) 1617 for (fd = anfdmax; fd--; )
581 if (anfds [fd].events) 1618 if (anfds [fd].events)
582 { 1619 {
583 fd_kill (EV_A_ fd); 1620 fd_kill (EV_A_ fd);
584 return; 1621 break;
585 } 1622 }
586} 1623}
587 1624
588/* usually called after fork if backend needs to re-arm all fds from scratch */ 1625/* usually called after fork if backend needs to re-arm all fds from scratch */
589static void noinline 1626static void noinline
… …
593 1630
594 for (fd = 0; fd < anfdmax; ++fd) 1631 for (fd = 0; fd < anfdmax; ++fd)
595 if (anfds [fd].events) 1632 if (anfds [fd].events)
596 { 1633 {
597 anfds [fd].events = 0; 1634 anfds [fd].events = 0;
598 fd_change (EV_A_ fd); 1635 anfds [fd].emask = 0;
1636 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
599 } 1637 }
600} 1638}
601 1639
602/*****************************************************************************/ 1640/* used to prepare libev internal fd's */
603 1641/* this is not fork-safe */
604void inline_speed 1642inline_speed void
605upheap (WT *heap, int k)
606{
607 WT w = heap [k];
608
609 while (k && heap [k >> 1]->at > w->at)
610 {
611 heap [k] = heap [k >> 1];
612 ((W)heap [k])->active = k + 1;
613 k >>= 1;
614 }
615
616 heap [k] = w;
617 ((W)heap [k])->active = k + 1;
618
619}
620
621void inline_speed
622downheap (WT *heap, int N, int k)
623{
624 WT w = heap [k];
625
626 while (k < (N >> 1))
627 {
628 int j = k << 1;
629
630 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
631 ++j;
632
633 if (w->at <= heap [j]->at)
634 break;
635
636 heap [k] = heap [j];
637 ((W)heap [k])->active = k + 1;
638 k = j;
639 }
640
641 heap [k] = w;
642 ((W)heap [k])->active = k + 1;
643}
644
645void inline_size
646adjustheap (WT *heap, int N, int k)
647{
648 upheap (heap, k);
649 downheap (heap, N, k);
650}
651
652/*****************************************************************************/
653
654typedef struct
655{
656 WL head;
657 sig_atomic_t volatile gotsig;
658} ANSIG;
659
660static ANSIG *signals;
661static int signalmax;
662
663static int sigpipe [2];
664static sig_atomic_t volatile gotsig;
665static ev_io sigev;
666
667void inline_size
668signals_init (ANSIG *base, int count)
669{
670 while (count--)
671 {
672 base->head = 0;
673 base->gotsig = 0;
674
675 ++base;
676 }
677}
678
679static void
680sighandler (int signum)
681{
682#if _WIN32
683 signal (signum, sighandler);
684#endif
685
686 signals [signum - 1].gotsig = 1;
687
688 if (!gotsig)
689 {
690 int old_errno = errno;
691 gotsig = 1;
692 write (sigpipe [1], &signum, 1);
693 errno = old_errno;
694 }
695}
696
697void noinline
698ev_feed_signal_event (EV_P_ int signum)
699{
700 WL w;
701
702#if EV_MULTIPLICITY
703 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
704#endif
705
706 --signum;
707
708 if (signum < 0 || signum >= signalmax)
709 return;
710
711 signals [signum].gotsig = 0;
712
713 for (w = signals [signum].head; w; w = w->next)
714 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
715}
716
717static void
718sigcb (EV_P_ ev_io *iow, int revents)
719{
720 int signum;
721
722 read (sigpipe [0], &revents, 1);
723 gotsig = 0;
724
725 for (signum = signalmax; signum--; )
726 if (signals [signum].gotsig)
727 ev_feed_signal_event (EV_A_ signum + 1);
728}
729
730void inline_size
731fd_intern (int fd) 1643fd_intern (int fd)
732{ 1644{
733#ifdef _WIN32 1645#ifdef _WIN32
734 int arg = 1; 1646 unsigned long arg = 1;
735 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1647 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
736#else 1648#else
737 fcntl (fd, F_SETFD, FD_CLOEXEC); 1649 fcntl (fd, F_SETFD, FD_CLOEXEC);
738 fcntl (fd, F_SETFL, O_NONBLOCK); 1650 fcntl (fd, F_SETFL, O_NONBLOCK);
739#endif 1651#endif
740} 1652}
741 1653
742static void noinline
743siginit (EV_P)
744{
745 fd_intern (sigpipe [0]);
746 fd_intern (sigpipe [1]);
747
748 ev_io_set (&sigev, sigpipe [0], EV_READ);
749 ev_io_start (EV_A_ &sigev);
750 ev_unref (EV_A); /* child watcher should not keep loop alive */
751}
752
753/*****************************************************************************/ 1654/*****************************************************************************/
754 1655
755static ev_child *childs [EV_PID_HASHSIZE]; 1656/*
1657 * the heap functions want a real array index. array index 0 is guaranteed to not
1658 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1659 * the branching factor of the d-tree.
1660 */
756 1661
1662/*
1663 * at the moment we allow libev the luxury of two heaps,
1664 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1665 * which is more cache-efficient.
1666 * the difference is about 5% with 50000+ watchers.
1667 */
1668#if EV_USE_4HEAP
1669
1670#define DHEAP 4
1671#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1672#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1673#define UPHEAP_DONE(p,k) ((p) == (k))
1674
1675/* away from the root */
1676inline_speed void
1677downheap (ANHE *heap, int N, int k)
1678{
1679 ANHE he = heap [k];
1680 ANHE *E = heap + N + HEAP0;
1681
1682 for (;;)
1683 {
1684 ev_tstamp minat;
1685 ANHE *minpos;
1686 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1687
1688 /* find minimum child */
1689 if (expect_true (pos + DHEAP - 1 < E))
1690 {
1691 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1692 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1693 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1694 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1695 }
1696 else if (pos < E)
1697 {
1698 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1699 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1700 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1701 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1702 }
1703 else
1704 break;
1705
1706 if (ANHE_at (he) <= minat)
1707 break;
1708
1709 heap [k] = *minpos;
1710 ev_active (ANHE_w (*minpos)) = k;
1711
1712 k = minpos - heap;
1713 }
1714
1715 heap [k] = he;
1716 ev_active (ANHE_w (he)) = k;
1717}
1718
1719#else /* 4HEAP */
1720
1721#define HEAP0 1
1722#define HPARENT(k) ((k) >> 1)
1723#define UPHEAP_DONE(p,k) (!(p))
1724
1725/* away from the root */
1726inline_speed void
1727downheap (ANHE *heap, int N, int k)
1728{
1729 ANHE he = heap [k];
1730
1731 for (;;)
1732 {
1733 int c = k << 1;
1734
1735 if (c >= N + HEAP0)
1736 break;
1737
1738 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1739 ? 1 : 0;
1740
1741 if (ANHE_at (he) <= ANHE_at (heap [c]))
1742 break;
1743
1744 heap [k] = heap [c];
1745 ev_active (ANHE_w (heap [k])) = k;
1746
1747 k = c;
1748 }
1749
1750 heap [k] = he;
1751 ev_active (ANHE_w (he)) = k;
1752}
1753#endif
1754
1755/* towards the root */
1756inline_speed void
1757upheap (ANHE *heap, int k)
1758{
1759 ANHE he = heap [k];
1760
1761 for (;;)
1762 {
1763 int p = HPARENT (k);
1764
1765 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1766 break;
1767
1768 heap [k] = heap [p];
1769 ev_active (ANHE_w (heap [k])) = k;
1770 k = p;
1771 }
1772
1773 heap [k] = he;
1774 ev_active (ANHE_w (he)) = k;
1775}
1776
1777/* move an element suitably so it is in a correct place */
1778inline_size void
1779adjustheap (ANHE *heap, int N, int k)
1780{
1781 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1782 upheap (heap, k);
1783 else
1784 downheap (heap, N, k);
1785}
1786
1787/* rebuild the heap: this function is used only once and executed rarely */
1788inline_size void
1789reheap (ANHE *heap, int N)
1790{
1791 int i;
1792
1793 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1794 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1795 for (i = 0; i < N; ++i)
1796 upheap (heap, i + HEAP0);
1797}
1798
1799/*****************************************************************************/
1800
1801/* associate signal watchers to a signal signal */
1802typedef struct
1803{
1804 EV_ATOMIC_T pending;
1805#if EV_MULTIPLICITY
1806 EV_P;
1807#endif
1808 WL head;
1809} ANSIG;
1810
1811static ANSIG signals [EV_NSIG - 1];
1812
1813/*****************************************************************************/
1814
1815#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1816
1817static void noinline ecb_cold
1818evpipe_init (EV_P)
1819{
1820 if (!ev_is_active (&pipe_w))
1821 {
1822# if EV_USE_EVENTFD
1823 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1824 if (evfd < 0 && errno == EINVAL)
1825 evfd = eventfd (0, 0);
1826
1827 if (evfd >= 0)
1828 {
1829 evpipe [0] = -1;
1830 fd_intern (evfd); /* doing it twice doesn't hurt */
1831 ev_io_set (&pipe_w, evfd, EV_READ);
1832 }
1833 else
1834# endif
1835 {
1836 while (pipe (evpipe))
1837 ev_syserr ("(libev) error creating signal/async pipe");
1838
1839 fd_intern (evpipe [0]);
1840 fd_intern (evpipe [1]);
1841 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1842 }
1843
1844 ev_io_start (EV_A_ &pipe_w);
1845 ev_unref (EV_A); /* watcher should not keep loop alive */
1846 }
1847}
1848
1849inline_speed void
1850evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1851{
1852 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1853
1854 if (expect_true (*flag))
1855 return;
1856
1857 *flag = 1;
1858
1859 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1860
1861 pipe_write_skipped = 1;
1862
1863 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1864
1865 if (pipe_write_wanted)
1866 {
1867 int old_errno;
1868
1869 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1870
1871 old_errno = errno; /* save errno because write will clobber it */
1872
1873#if EV_USE_EVENTFD
1874 if (evfd >= 0)
1875 {
1876 uint64_t counter = 1;
1877 write (evfd, &counter, sizeof (uint64_t));
1878 }
1879 else
1880#endif
1881 {
757#ifndef _WIN32 1882#ifdef _WIN32
1883 WSABUF buf;
1884 DWORD sent;
1885 buf.buf = &buf;
1886 buf.len = 1;
1887 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1888#else
1889 write (evpipe [1], &(evpipe [1]), 1);
1890#endif
1891 }
1892
1893 errno = old_errno;
1894 }
1895}
1896
1897/* called whenever the libev signal pipe */
1898/* got some events (signal, async) */
1899static void
1900pipecb (EV_P_ ev_io *iow, int revents)
1901{
1902 int i;
1903
1904 if (revents & EV_READ)
1905 {
1906#if EV_USE_EVENTFD
1907 if (evfd >= 0)
1908 {
1909 uint64_t counter;
1910 read (evfd, &counter, sizeof (uint64_t));
1911 }
1912 else
1913#endif
1914 {
1915 char dummy[4];
1916#ifdef _WIN32
1917 WSABUF buf;
1918 DWORD recvd;
1919 buf.buf = dummy;
1920 buf.len = sizeof (dummy);
1921 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, 0, 0, 0);
1922#else
1923 read (evpipe [0], &dummy, sizeof (dummy));
1924#endif
1925 }
1926 }
1927
1928 pipe_write_skipped = 0;
1929
1930 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1931
1932#if EV_SIGNAL_ENABLE
1933 if (sig_pending)
1934 {
1935 sig_pending = 0;
1936
1937 ECB_MEMORY_FENCE_RELEASE;
1938
1939 for (i = EV_NSIG - 1; i--; )
1940 if (expect_false (signals [i].pending))
1941 ev_feed_signal_event (EV_A_ i + 1);
1942 }
1943#endif
1944
1945#if EV_ASYNC_ENABLE
1946 if (async_pending)
1947 {
1948 async_pending = 0;
1949
1950 ECB_MEMORY_FENCE_RELEASE;
1951
1952 for (i = asynccnt; i--; )
1953 if (asyncs [i]->sent)
1954 {
1955 asyncs [i]->sent = 0;
1956 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1957 }
1958 }
1959#endif
1960}
1961
1962/*****************************************************************************/
1963
1964void
1965ev_feed_signal (int signum) EV_THROW
1966{
1967#if EV_MULTIPLICITY
1968 EV_P = signals [signum - 1].loop;
1969
1970 if (!EV_A)
1971 return;
1972#endif
1973
1974 if (!ev_active (&pipe_w))
1975 return;
1976
1977 signals [signum - 1].pending = 1;
1978 evpipe_write (EV_A_ &sig_pending);
1979}
1980
1981static void
1982ev_sighandler (int signum)
1983{
1984#ifdef _WIN32
1985 signal (signum, ev_sighandler);
1986#endif
1987
1988 ev_feed_signal (signum);
1989}
1990
1991void noinline
1992ev_feed_signal_event (EV_P_ int signum) EV_THROW
1993{
1994 WL w;
1995
1996 if (expect_false (signum <= 0 || signum > EV_NSIG))
1997 return;
1998
1999 --signum;
2000
2001#if EV_MULTIPLICITY
2002 /* it is permissible to try to feed a signal to the wrong loop */
2003 /* or, likely more useful, feeding a signal nobody is waiting for */
2004
2005 if (expect_false (signals [signum].loop != EV_A))
2006 return;
2007#endif
2008
2009 signals [signum].pending = 0;
2010
2011 for (w = signals [signum].head; w; w = w->next)
2012 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2013}
2014
2015#if EV_USE_SIGNALFD
2016static void
2017sigfdcb (EV_P_ ev_io *iow, int revents)
2018{
2019 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2020
2021 for (;;)
2022 {
2023 ssize_t res = read (sigfd, si, sizeof (si));
2024
2025 /* not ISO-C, as res might be -1, but works with SuS */
2026 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2027 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2028
2029 if (res < (ssize_t)sizeof (si))
2030 break;
2031 }
2032}
2033#endif
2034
2035#endif
2036
2037/*****************************************************************************/
2038
2039#if EV_CHILD_ENABLE
2040static WL childs [EV_PID_HASHSIZE];
758 2041
759static ev_signal childev; 2042static ev_signal childev;
760 2043
761void inline_speed 2044#ifndef WIFCONTINUED
2045# define WIFCONTINUED(status) 0
2046#endif
2047
2048/* handle a single child status event */
2049inline_speed void
762child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2050child_reap (EV_P_ int chain, int pid, int status)
763{ 2051{
764 ev_child *w; 2052 ev_child *w;
2053 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
765 2054
766 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2055 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2056 {
767 if (w->pid == pid || !w->pid) 2057 if ((w->pid == pid || !w->pid)
2058 && (!traced || (w->flags & 1)))
768 { 2059 {
769 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 2060 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
770 w->rpid = pid; 2061 w->rpid = pid;
771 w->rstatus = status; 2062 w->rstatus = status;
772 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2063 ev_feed_event (EV_A_ (W)w, EV_CHILD);
773 } 2064 }
2065 }
774} 2066}
775 2067
776#ifndef WCONTINUED 2068#ifndef WCONTINUED
777# define WCONTINUED 0 2069# define WCONTINUED 0
778#endif 2070#endif
779 2071
2072/* called on sigchld etc., calls waitpid */
780static void 2073static void
781childcb (EV_P_ ev_signal *sw, int revents) 2074childcb (EV_P_ ev_signal *sw, int revents)
782{ 2075{
783 int pid, status; 2076 int pid, status;
784 2077
… …
787 if (!WCONTINUED 2080 if (!WCONTINUED
788 || errno != EINVAL 2081 || errno != EINVAL
789 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2082 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
790 return; 2083 return;
791 2084
792 /* make sure we are called again until all childs have been reaped */ 2085 /* make sure we are called again until all children have been reaped */
793 /* we need to do it this way so that the callback gets called before we continue */ 2086 /* we need to do it this way so that the callback gets called before we continue */
794 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2087 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
795 2088
796 child_reap (EV_A_ sw, pid, pid, status); 2089 child_reap (EV_A_ pid, pid, status);
797 if (EV_PID_HASHSIZE > 1) 2090 if ((EV_PID_HASHSIZE) > 1)
798 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2091 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
799} 2092}
800 2093
801#endif 2094#endif
802 2095
803/*****************************************************************************/ 2096/*****************************************************************************/
804 2097
2098#if EV_USE_IOCP
2099# include "ev_iocp.c"
2100#endif
805#if EV_USE_PORT 2101#if EV_USE_PORT
806# include "ev_port.c" 2102# include "ev_port.c"
807#endif 2103#endif
808#if EV_USE_KQUEUE 2104#if EV_USE_KQUEUE
809# include "ev_kqueue.c" 2105# include "ev_kqueue.c"
… …
816#endif 2112#endif
817#if EV_USE_SELECT 2113#if EV_USE_SELECT
818# include "ev_select.c" 2114# include "ev_select.c"
819#endif 2115#endif
820 2116
821int 2117int ecb_cold
822ev_version_major (void) 2118ev_version_major (void) EV_THROW
823{ 2119{
824 return EV_VERSION_MAJOR; 2120 return EV_VERSION_MAJOR;
825} 2121}
826 2122
827int 2123int ecb_cold
828ev_version_minor (void) 2124ev_version_minor (void) EV_THROW
829{ 2125{
830 return EV_VERSION_MINOR; 2126 return EV_VERSION_MINOR;
831} 2127}
832 2128
833/* return true if we are running with elevated privileges and should ignore env variables */ 2129/* return true if we are running with elevated privileges and should ignore env variables */
834int inline_size 2130int inline_size ecb_cold
835enable_secure (void) 2131enable_secure (void)
836{ 2132{
837#ifdef _WIN32 2133#ifdef _WIN32
838 return 0; 2134 return 0;
839#else 2135#else
840 return getuid () != geteuid () 2136 return getuid () != geteuid ()
841 || getgid () != getegid (); 2137 || getgid () != getegid ();
842#endif 2138#endif
843} 2139}
844 2140
845unsigned int 2141unsigned int ecb_cold
846ev_supported_backends (void) 2142ev_supported_backends (void) EV_THROW
847{ 2143{
848 unsigned int flags = 0; 2144 unsigned int flags = 0;
849 2145
850 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2146 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
851 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2147 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
854 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2150 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
855 2151
856 return flags; 2152 return flags;
857} 2153}
858 2154
859unsigned int 2155unsigned int ecb_cold
860ev_recommended_backends (void) 2156ev_recommended_backends (void) EV_THROW
861{ 2157{
862 unsigned int flags = ev_supported_backends (); 2158 unsigned int flags = ev_supported_backends ();
863 2159
864#ifndef __NetBSD__ 2160#ifndef __NetBSD__
865 /* kqueue is borked on everything but netbsd apparently */ 2161 /* kqueue is borked on everything but netbsd apparently */
866 /* it usually doesn't work correctly on anything but sockets and pipes */ 2162 /* it usually doesn't work correctly on anything but sockets and pipes */
867 flags &= ~EVBACKEND_KQUEUE; 2163 flags &= ~EVBACKEND_KQUEUE;
868#endif 2164#endif
869#ifdef __APPLE__ 2165#ifdef __APPLE__
870 // flags &= ~EVBACKEND_KQUEUE; for documentation 2166 /* only select works correctly on that "unix-certified" platform */
871 flags &= ~EVBACKEND_POLL; 2167 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2168 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2169#endif
2170#ifdef __FreeBSD__
2171 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
872#endif 2172#endif
873 2173
874 return flags; 2174 return flags;
875} 2175}
876 2176
2177unsigned int ecb_cold
2178ev_embeddable_backends (void) EV_THROW
2179{
2180 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2181
2182 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2183 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2184 flags &= ~EVBACKEND_EPOLL;
2185
2186 return flags;
2187}
2188
877unsigned int 2189unsigned int
878ev_embeddable_backends (void) 2190ev_backend (EV_P) EV_THROW
879{ 2191{
880 return EVBACKEND_EPOLL 2192 return backend;
881 | EVBACKEND_KQUEUE
882 | EVBACKEND_PORT;
883} 2193}
884 2194
2195#if EV_FEATURE_API
885unsigned int 2196unsigned int
886ev_backend (EV_P) 2197ev_iteration (EV_P) EV_THROW
887{ 2198{
888 return backend; 2199 return loop_count;
889} 2200}
890 2201
2202unsigned int
2203ev_depth (EV_P) EV_THROW
2204{
2205 return loop_depth;
2206}
2207
2208void
2209ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2210{
2211 io_blocktime = interval;
2212}
2213
2214void
2215ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2216{
2217 timeout_blocktime = interval;
2218}
2219
2220void
2221ev_set_userdata (EV_P_ void *data) EV_THROW
2222{
2223 userdata = data;
2224}
2225
2226void *
2227ev_userdata (EV_P) EV_THROW
2228{
2229 return userdata;
2230}
2231
2232void
2233ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2234{
2235 invoke_cb = invoke_pending_cb;
2236}
2237
2238void
2239ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2240{
2241 release_cb = release;
2242 acquire_cb = acquire;
2243}
2244#endif
2245
2246/* initialise a loop structure, must be zero-initialised */
891static void noinline 2247static void noinline ecb_cold
892loop_init (EV_P_ unsigned int flags) 2248loop_init (EV_P_ unsigned int flags) EV_THROW
893{ 2249{
894 if (!backend) 2250 if (!backend)
895 { 2251 {
2252 origflags = flags;
2253
2254#if EV_USE_REALTIME
2255 if (!have_realtime)
2256 {
2257 struct timespec ts;
2258
2259 if (!clock_gettime (CLOCK_REALTIME, &ts))
2260 have_realtime = 1;
2261 }
2262#endif
2263
896#if EV_USE_MONOTONIC 2264#if EV_USE_MONOTONIC
2265 if (!have_monotonic)
897 { 2266 {
898 struct timespec ts; 2267 struct timespec ts;
2268
899 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2269 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
900 have_monotonic = 1; 2270 have_monotonic = 1;
901 } 2271 }
902#endif 2272#endif
903
904 ev_rt_now = ev_time ();
905 mn_now = get_clock ();
906 now_floor = mn_now;
907 rtmn_diff = ev_rt_now - mn_now;
908 2273
909 /* pid check not overridable via env */ 2274 /* pid check not overridable via env */
910#ifndef _WIN32 2275#ifndef _WIN32
911 if (flags & EVFLAG_FORKCHECK) 2276 if (flags & EVFLAG_FORKCHECK)
912 curpid = getpid (); 2277 curpid = getpid ();
… …
915 if (!(flags & EVFLAG_NOENV) 2280 if (!(flags & EVFLAG_NOENV)
916 && !enable_secure () 2281 && !enable_secure ()
917 && getenv ("LIBEV_FLAGS")) 2282 && getenv ("LIBEV_FLAGS"))
918 flags = atoi (getenv ("LIBEV_FLAGS")); 2283 flags = atoi (getenv ("LIBEV_FLAGS"));
919 2284
920 if (!(flags & 0x0000ffffUL)) 2285 ev_rt_now = ev_time ();
2286 mn_now = get_clock ();
2287 now_floor = mn_now;
2288 rtmn_diff = ev_rt_now - mn_now;
2289#if EV_FEATURE_API
2290 invoke_cb = ev_invoke_pending;
2291#endif
2292
2293 io_blocktime = 0.;
2294 timeout_blocktime = 0.;
2295 backend = 0;
2296 backend_fd = -1;
2297 sig_pending = 0;
2298#if EV_ASYNC_ENABLE
2299 async_pending = 0;
2300#endif
2301 pipe_write_skipped = 0;
2302 pipe_write_wanted = 0;
2303#if EV_USE_INOTIFY
2304 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2305#endif
2306#if EV_USE_SIGNALFD
2307 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2308#endif
2309
2310 if (!(flags & EVBACKEND_MASK))
921 flags |= ev_recommended_backends (); 2311 flags |= ev_recommended_backends ();
922 2312
923 backend = 0;
924 backend_fd = -1;
925#if EV_USE_INOTIFY 2313#if EV_USE_IOCP
926 fs_fd = -2; 2314 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
927#endif 2315#endif
928
929#if EV_USE_PORT 2316#if EV_USE_PORT
930 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2317 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
931#endif 2318#endif
932#if EV_USE_KQUEUE 2319#if EV_USE_KQUEUE
933 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2320 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
940#endif 2327#endif
941#if EV_USE_SELECT 2328#if EV_USE_SELECT
942 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2329 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
943#endif 2330#endif
944 2331
2332 ev_prepare_init (&pending_w, pendingcb);
2333
2334#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
945 ev_init (&sigev, sigcb); 2335 ev_init (&pipe_w, pipecb);
946 ev_set_priority (&sigev, EV_MAXPRI); 2336 ev_set_priority (&pipe_w, EV_MAXPRI);
2337#endif
947 } 2338 }
948} 2339}
949 2340
950static void noinline 2341/* free up a loop structure */
2342void ecb_cold
951loop_destroy (EV_P) 2343ev_loop_destroy (EV_P)
952{ 2344{
953 int i; 2345 int i;
2346
2347#if EV_MULTIPLICITY
2348 /* mimic free (0) */
2349 if (!EV_A)
2350 return;
2351#endif
2352
2353#if EV_CLEANUP_ENABLE
2354 /* queue cleanup watchers (and execute them) */
2355 if (expect_false (cleanupcnt))
2356 {
2357 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2358 EV_INVOKE_PENDING;
2359 }
2360#endif
2361
2362#if EV_CHILD_ENABLE
2363 if (ev_is_active (&childev))
2364 {
2365 ev_ref (EV_A); /* child watcher */
2366 ev_signal_stop (EV_A_ &childev);
2367 }
2368#endif
2369
2370 if (ev_is_active (&pipe_w))
2371 {
2372 /*ev_ref (EV_A);*/
2373 /*ev_io_stop (EV_A_ &pipe_w);*/
2374
2375#if EV_USE_EVENTFD
2376 if (evfd >= 0)
2377 close (evfd);
2378#endif
2379
2380 if (evpipe [0] >= 0)
2381 {
2382 EV_WIN32_CLOSE_FD (evpipe [0]);
2383 EV_WIN32_CLOSE_FD (evpipe [1]);
2384 }
2385 }
2386
2387#if EV_USE_SIGNALFD
2388 if (ev_is_active (&sigfd_w))
2389 close (sigfd);
2390#endif
954 2391
955#if EV_USE_INOTIFY 2392#if EV_USE_INOTIFY
956 if (fs_fd >= 0) 2393 if (fs_fd >= 0)
957 close (fs_fd); 2394 close (fs_fd);
958#endif 2395#endif
959 2396
960 if (backend_fd >= 0) 2397 if (backend_fd >= 0)
961 close (backend_fd); 2398 close (backend_fd);
962 2399
2400#if EV_USE_IOCP
2401 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2402#endif
963#if EV_USE_PORT 2403#if EV_USE_PORT
964 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2404 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
965#endif 2405#endif
966#if EV_USE_KQUEUE 2406#if EV_USE_KQUEUE
967 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2407 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
975#if EV_USE_SELECT 2415#if EV_USE_SELECT
976 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 2416 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
977#endif 2417#endif
978 2418
979 for (i = NUMPRI; i--; ) 2419 for (i = NUMPRI; i--; )
2420 {
980 array_free (pending, [i]); 2421 array_free (pending, [i]);
2422#if EV_IDLE_ENABLE
2423 array_free (idle, [i]);
2424#endif
2425 }
2426
2427 ev_free (anfds); anfds = 0; anfdmax = 0;
981 2428
982 /* have to use the microsoft-never-gets-it-right macro */ 2429 /* have to use the microsoft-never-gets-it-right macro */
2430 array_free (rfeed, EMPTY);
983 array_free (fdchange, EMPTY0); 2431 array_free (fdchange, EMPTY);
984 array_free (timer, EMPTY0); 2432 array_free (timer, EMPTY);
985#if EV_PERIODIC_ENABLE 2433#if EV_PERIODIC_ENABLE
986 array_free (periodic, EMPTY0); 2434 array_free (periodic, EMPTY);
987#endif 2435#endif
2436#if EV_FORK_ENABLE
2437 array_free (fork, EMPTY);
2438#endif
2439#if EV_CLEANUP_ENABLE
988 array_free (idle, EMPTY0); 2440 array_free (cleanup, EMPTY);
2441#endif
989 array_free (prepare, EMPTY0); 2442 array_free (prepare, EMPTY);
990 array_free (check, EMPTY0); 2443 array_free (check, EMPTY);
2444#if EV_ASYNC_ENABLE
2445 array_free (async, EMPTY);
2446#endif
991 2447
992 backend = 0; 2448 backend = 0;
993}
994 2449
2450#if EV_MULTIPLICITY
2451 if (ev_is_default_loop (EV_A))
2452#endif
2453 ev_default_loop_ptr = 0;
2454#if EV_MULTIPLICITY
2455 else
2456 ev_free (EV_A);
2457#endif
2458}
2459
2460#if EV_USE_INOTIFY
995void inline_size infy_fork (EV_P); 2461inline_size void infy_fork (EV_P);
2462#endif
996 2463
997void inline_size 2464inline_size void
998loop_fork (EV_P) 2465loop_fork (EV_P)
999{ 2466{
1000#if EV_USE_PORT 2467#if EV_USE_PORT
1001 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2468 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1002#endif 2469#endif
… …
1008#endif 2475#endif
1009#if EV_USE_INOTIFY 2476#if EV_USE_INOTIFY
1010 infy_fork (EV_A); 2477 infy_fork (EV_A);
1011#endif 2478#endif
1012 2479
1013 if (ev_is_active (&sigev)) 2480 if (ev_is_active (&pipe_w))
1014 { 2481 {
1015 /* default loop */ 2482 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1016 2483
1017 ev_ref (EV_A); 2484 ev_ref (EV_A);
1018 ev_io_stop (EV_A_ &sigev); 2485 ev_io_stop (EV_A_ &pipe_w);
1019 close (sigpipe [0]);
1020 close (sigpipe [1]);
1021 2486
1022 while (pipe (sigpipe)) 2487#if EV_USE_EVENTFD
1023 syserr ("(libev) error creating pipe"); 2488 if (evfd >= 0)
2489 close (evfd);
2490#endif
1024 2491
2492 if (evpipe [0] >= 0)
2493 {
2494 EV_WIN32_CLOSE_FD (evpipe [0]);
2495 EV_WIN32_CLOSE_FD (evpipe [1]);
2496 }
2497
2498#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1025 siginit (EV_A); 2499 evpipe_init (EV_A);
2500 /* now iterate over everything, in case we missed something */
2501 pipecb (EV_A_ &pipe_w, EV_READ);
2502#endif
1026 } 2503 }
1027 2504
1028 postfork = 0; 2505 postfork = 0;
1029} 2506}
1030 2507
1031#if EV_MULTIPLICITY 2508#if EV_MULTIPLICITY
2509
1032struct ev_loop * 2510struct ev_loop * ecb_cold
1033ev_loop_new (unsigned int flags) 2511ev_loop_new (unsigned int flags) EV_THROW
1034{ 2512{
1035 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2513 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1036 2514
1037 memset (loop, 0, sizeof (struct ev_loop)); 2515 memset (EV_A, 0, sizeof (struct ev_loop));
1038
1039 loop_init (EV_A_ flags); 2516 loop_init (EV_A_ flags);
1040 2517
1041 if (ev_backend (EV_A)) 2518 if (ev_backend (EV_A))
1042 return loop; 2519 return EV_A;
1043 2520
2521 ev_free (EV_A);
1044 return 0; 2522 return 0;
1045} 2523}
1046 2524
1047void 2525#endif /* multiplicity */
1048ev_loop_destroy (EV_P)
1049{
1050 loop_destroy (EV_A);
1051 ev_free (loop);
1052}
1053 2526
1054void 2527#if EV_VERIFY
1055ev_loop_fork (EV_P) 2528static void noinline ecb_cold
2529verify_watcher (EV_P_ W w)
1056{ 2530{
1057 postfork = 1; 2531 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1058}
1059 2532
2533 if (w->pending)
2534 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2535}
2536
2537static void noinline ecb_cold
2538verify_heap (EV_P_ ANHE *heap, int N)
2539{
2540 int i;
2541
2542 for (i = HEAP0; i < N + HEAP0; ++i)
2543 {
2544 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2545 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2546 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2547
2548 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2549 }
2550}
2551
2552static void noinline ecb_cold
2553array_verify (EV_P_ W *ws, int cnt)
2554{
2555 while (cnt--)
2556 {
2557 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2558 verify_watcher (EV_A_ ws [cnt]);
2559 }
2560}
2561#endif
2562
2563#if EV_FEATURE_API
2564void ecb_cold
2565ev_verify (EV_P) EV_THROW
2566{
2567#if EV_VERIFY
2568 int i, j;
2569 WL w, w2;
2570
2571 assert (activecnt >= -1);
2572
2573 assert (fdchangemax >= fdchangecnt);
2574 for (i = 0; i < fdchangecnt; ++i)
2575 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2576
2577 assert (anfdmax >= 0);
2578 for (i = j = 0; i < anfdmax; ++i)
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 assert (timermax >= timercnt);
2594 verify_heap (EV_A_ timers, timercnt);
2595
2596#if EV_PERIODIC_ENABLE
2597 assert (periodicmax >= periodiccnt);
2598 verify_heap (EV_A_ periodics, periodiccnt);
2599#endif
2600
2601 for (i = NUMPRI; i--; )
2602 {
2603 assert (pendingmax [i] >= pendingcnt [i]);
2604#if EV_IDLE_ENABLE
2605 assert (idleall >= 0);
2606 assert (idlemax [i] >= idlecnt [i]);
2607 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2608#endif
2609 }
2610
2611#if EV_FORK_ENABLE
2612 assert (forkmax >= forkcnt);
2613 array_verify (EV_A_ (W *)forks, forkcnt);
2614#endif
2615
2616#if EV_CLEANUP_ENABLE
2617 assert (cleanupmax >= cleanupcnt);
2618 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2619#endif
2620
2621#if EV_ASYNC_ENABLE
2622 assert (asyncmax >= asynccnt);
2623 array_verify (EV_A_ (W *)asyncs, asynccnt);
2624#endif
2625
2626#if EV_PREPARE_ENABLE
2627 assert (preparemax >= preparecnt);
2628 array_verify (EV_A_ (W *)prepares, preparecnt);
2629#endif
2630
2631#if EV_CHECK_ENABLE
2632 assert (checkmax >= checkcnt);
2633 array_verify (EV_A_ (W *)checks, checkcnt);
2634#endif
2635
2636# if 0
2637#if EV_CHILD_ENABLE
2638 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2639 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2640#endif
2641# endif
2642#endif
2643}
1060#endif 2644#endif
1061 2645
1062#if EV_MULTIPLICITY 2646#if EV_MULTIPLICITY
1063struct ev_loop * 2647struct ev_loop * ecb_cold
1064ev_default_loop_init (unsigned int flags)
1065#else 2648#else
1066int 2649int
2650#endif
1067ev_default_loop (unsigned int flags) 2651ev_default_loop (unsigned int flags) EV_THROW
1068#endif
1069{ 2652{
1070 if (sigpipe [0] == sigpipe [1])
1071 if (pipe (sigpipe))
1072 return 0;
1073
1074 if (!ev_default_loop_ptr) 2653 if (!ev_default_loop_ptr)
1075 { 2654 {
1076#if EV_MULTIPLICITY 2655#if EV_MULTIPLICITY
1077 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2656 EV_P = ev_default_loop_ptr = &default_loop_struct;
1078#else 2657#else
1079 ev_default_loop_ptr = 1; 2658 ev_default_loop_ptr = 1;
1080#endif 2659#endif
1081 2660
1082 loop_init (EV_A_ flags); 2661 loop_init (EV_A_ flags);
1083 2662
1084 if (ev_backend (EV_A)) 2663 if (ev_backend (EV_A))
1085 { 2664 {
1086 siginit (EV_A); 2665#if EV_CHILD_ENABLE
1087
1088#ifndef _WIN32
1089 ev_signal_init (&childev, childcb, SIGCHLD); 2666 ev_signal_init (&childev, childcb, SIGCHLD);
1090 ev_set_priority (&childev, EV_MAXPRI); 2667 ev_set_priority (&childev, EV_MAXPRI);
1091 ev_signal_start (EV_A_ &childev); 2668 ev_signal_start (EV_A_ &childev);
1092 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2669 ev_unref (EV_A); /* child watcher should not keep loop alive */
1093#endif 2670#endif
… …
1098 2675
1099 return ev_default_loop_ptr; 2676 return ev_default_loop_ptr;
1100} 2677}
1101 2678
1102void 2679void
1103ev_default_destroy (void) 2680ev_loop_fork (EV_P) EV_THROW
1104{ 2681{
1105#if EV_MULTIPLICITY 2682 postfork = 1; /* must be in line with ev_default_fork */
1106 struct ev_loop *loop = ev_default_loop_ptr;
1107#endif
1108
1109#ifndef _WIN32
1110 ev_ref (EV_A); /* child watcher */
1111 ev_signal_stop (EV_A_ &childev);
1112#endif
1113
1114 ev_ref (EV_A); /* signal watcher */
1115 ev_io_stop (EV_A_ &sigev);
1116
1117 close (sigpipe [0]); sigpipe [0] = 0;
1118 close (sigpipe [1]); sigpipe [1] = 0;
1119
1120 loop_destroy (EV_A);
1121} 2683}
2684
2685/*****************************************************************************/
1122 2686
1123void 2687void
1124ev_default_fork (void) 2688ev_invoke (EV_P_ void *w, int revents)
1125{ 2689{
1126#if EV_MULTIPLICITY 2690 EV_CB_INVOKE ((W)w, revents);
1127 struct ev_loop *loop = ev_default_loop_ptr;
1128#endif
1129
1130 if (backend)
1131 postfork = 1;
1132} 2691}
1133 2692
1134/*****************************************************************************/ 2693unsigned int
1135 2694ev_pending_count (EV_P) EV_THROW
1136int inline_size
1137any_pending (EV_P)
1138{ 2695{
1139 int pri; 2696 int pri;
2697 unsigned int count = 0;
1140 2698
1141 for (pri = NUMPRI; pri--; ) 2699 for (pri = NUMPRI; pri--; )
1142 if (pendingcnt [pri]) 2700 count += pendingcnt [pri];
1143 return 1;
1144 2701
1145 return 0; 2702 return count;
1146} 2703}
1147 2704
1148void inline_speed 2705void noinline
1149call_pending (EV_P) 2706ev_invoke_pending (EV_P)
1150{ 2707{
1151 int pri; 2708 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
1152
1153 for (pri = NUMPRI; pri--; )
1154 while (pendingcnt [pri]) 2709 while (pendingcnt [pendingpri])
1155 { 2710 {
1156 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2711 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1157 2712
1158 if (expect_true (p->w))
1159 {
1160 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1161
1162 p->w->pending = 0; 2713 p->w->pending = 0;
1163 EV_CB_INVOKE (p->w, p->events); 2714 EV_CB_INVOKE (p->w, p->events);
1164 } 2715 EV_FREQUENT_CHECK;
1165 } 2716 }
1166} 2717}
1167 2718
1168void inline_size 2719#if EV_IDLE_ENABLE
2720/* make idle watchers pending. this handles the "call-idle */
2721/* only when higher priorities are idle" logic */
2722inline_size void
2723idle_reify (EV_P)
2724{
2725 if (expect_false (idleall))
2726 {
2727 int pri;
2728
2729 for (pri = NUMPRI; pri--; )
2730 {
2731 if (pendingcnt [pri])
2732 break;
2733
2734 if (idlecnt [pri])
2735 {
2736 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2737 break;
2738 }
2739 }
2740 }
2741}
2742#endif
2743
2744/* make timers pending */
2745inline_size void
1169timers_reify (EV_P) 2746timers_reify (EV_P)
1170{ 2747{
2748 EV_FREQUENT_CHECK;
2749
1171 while (timercnt && ((WT)timers [0])->at <= mn_now) 2750 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1172 { 2751 {
1173 ev_timer *w = timers [0]; 2752 do
1174
1175 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1176
1177 /* first reschedule or stop timer */
1178 if (w->repeat)
1179 { 2753 {
2754 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2755
2756 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2757
2758 /* first reschedule or stop timer */
2759 if (w->repeat)
2760 {
2761 ev_at (w) += w->repeat;
2762 if (ev_at (w) < mn_now)
2763 ev_at (w) = mn_now;
2764
1180 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2765 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1181 2766
1182 ((WT)w)->at += w->repeat; 2767 ANHE_at_cache (timers [HEAP0]);
1183 if (((WT)w)->at < mn_now)
1184 ((WT)w)->at = mn_now;
1185
1186 downheap ((WT *)timers, timercnt, 0); 2768 downheap (timers, timercnt, HEAP0);
2769 }
2770 else
2771 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2772
2773 EV_FREQUENT_CHECK;
2774 feed_reverse (EV_A_ (W)w);
1187 } 2775 }
1188 else 2776 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1189 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1190 2777
1191 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2778 feed_reverse_done (EV_A_ EV_TIMER);
1192 } 2779 }
1193} 2780}
1194 2781
1195#if EV_PERIODIC_ENABLE 2782#if EV_PERIODIC_ENABLE
1196void inline_size 2783
2784static void noinline
2785periodic_recalc (EV_P_ ev_periodic *w)
2786{
2787 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2788 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2789
2790 /* the above almost always errs on the low side */
2791 while (at <= ev_rt_now)
2792 {
2793 ev_tstamp nat = at + w->interval;
2794
2795 /* when resolution fails us, we use ev_rt_now */
2796 if (expect_false (nat == at))
2797 {
2798 at = ev_rt_now;
2799 break;
2800 }
2801
2802 at = nat;
2803 }
2804
2805 ev_at (w) = at;
2806}
2807
2808/* make periodics pending */
2809inline_size void
1197periodics_reify (EV_P) 2810periodics_reify (EV_P)
1198{ 2811{
2812 EV_FREQUENT_CHECK;
2813
1199 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2814 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1200 { 2815 {
1201 ev_periodic *w = periodics [0]; 2816 int feed_count = 0;
1202 2817
2818 do
2819 {
2820 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2821
1203 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2822 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1204 2823
1205 /* first reschedule or stop timer */ 2824 /* first reschedule or stop timer */
2825 if (w->reschedule_cb)
2826 {
2827 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2828
2829 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2830
2831 ANHE_at_cache (periodics [HEAP0]);
2832 downheap (periodics, periodiccnt, HEAP0);
2833 }
2834 else if (w->interval)
2835 {
2836 periodic_recalc (EV_A_ w);
2837 ANHE_at_cache (periodics [HEAP0]);
2838 downheap (periodics, periodiccnt, HEAP0);
2839 }
2840 else
2841 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2842
2843 EV_FREQUENT_CHECK;
2844 feed_reverse (EV_A_ (W)w);
2845 }
2846 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2847
2848 feed_reverse_done (EV_A_ EV_PERIODIC);
2849 }
2850}
2851
2852/* simply recalculate all periodics */
2853/* TODO: maybe ensure that at least one event happens when jumping forward? */
2854static void noinline ecb_cold
2855periodics_reschedule (EV_P)
2856{
2857 int i;
2858
2859 /* adjust periodics after time jump */
2860 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2861 {
2862 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2863
1206 if (w->reschedule_cb) 2864 if (w->reschedule_cb)
2865 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2866 else if (w->interval)
2867 periodic_recalc (EV_A_ w);
2868
2869 ANHE_at_cache (periodics [i]);
2870 }
2871
2872 reheap (periodics, periodiccnt);
2873}
2874#endif
2875
2876/* adjust all timers by a given offset */
2877static void noinline ecb_cold
2878timers_reschedule (EV_P_ ev_tstamp adjust)
2879{
2880 int i;
2881
2882 for (i = 0; i < timercnt; ++i)
2883 {
2884 ANHE *he = timers + i + HEAP0;
2885 ANHE_w (*he)->at += adjust;
2886 ANHE_at_cache (*he);
2887 }
2888}
2889
2890/* fetch new monotonic and realtime times from the kernel */
2891/* also detect if there was a timejump, and act accordingly */
2892inline_speed void
2893time_update (EV_P_ ev_tstamp max_block)
2894{
2895#if EV_USE_MONOTONIC
2896 if (expect_true (have_monotonic))
2897 {
2898 int i;
2899 ev_tstamp odiff = rtmn_diff;
2900
2901 mn_now = get_clock ();
2902
2903 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2904 /* interpolate in the meantime */
2905 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1207 { 2906 {
1208 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2907 ev_rt_now = rtmn_diff + mn_now;
1209 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2908 return;
1210 downheap ((WT *)periodics, periodiccnt, 0);
1211 } 2909 }
1212 else if (w->interval)
1213 {
1214 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1215 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1216 downheap ((WT *)periodics, periodiccnt, 0);
1217 }
1218 else
1219 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1220 2910
1221 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1222 }
1223}
1224
1225static void noinline
1226periodics_reschedule (EV_P)
1227{
1228 int i;
1229
1230 /* adjust periodics after time jump */
1231 for (i = 0; i < periodiccnt; ++i)
1232 {
1233 ev_periodic *w = periodics [i];
1234
1235 if (w->reschedule_cb)
1236 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1237 else if (w->interval)
1238 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1239 }
1240
1241 /* now rebuild the heap */
1242 for (i = periodiccnt >> 1; i--; )
1243 downheap ((WT *)periodics, periodiccnt, i);
1244}
1245#endif
1246
1247int inline_size
1248time_update_monotonic (EV_P)
1249{
1250 mn_now = get_clock ();
1251
1252 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1253 {
1254 ev_rt_now = rtmn_diff + mn_now;
1255 return 0;
1256 }
1257 else
1258 {
1259 now_floor = mn_now; 2911 now_floor = mn_now;
1260 ev_rt_now = ev_time (); 2912 ev_rt_now = ev_time ();
1261 return 1;
1262 }
1263}
1264 2913
1265void inline_size 2914 /* loop a few times, before making important decisions.
1266time_update (EV_P) 2915 * on the choice of "4": one iteration isn't enough,
1267{ 2916 * in case we get preempted during the calls to
1268 int i; 2917 * ev_time and get_clock. a second call is almost guaranteed
1269 2918 * to succeed in that case, though. and looping a few more times
1270#if EV_USE_MONOTONIC 2919 * doesn't hurt either as we only do this on time-jumps or
1271 if (expect_true (have_monotonic)) 2920 * in the unlikely event of having been preempted here.
1272 { 2921 */
1273 if (time_update_monotonic (EV_A)) 2922 for (i = 4; --i; )
1274 { 2923 {
1275 ev_tstamp odiff = rtmn_diff; 2924 ev_tstamp diff;
1276
1277 /* loop a few times, before making important decisions.
1278 * on the choice of "4": one iteration isn't enough,
1279 * in case we get preempted during the calls to
1280 * ev_time and get_clock. a second call is almost guaranteed
1281 * to succeed in that case, though. and looping a few more times
1282 * doesn't hurt either as we only do this on time-jumps or
1283 * in the unlikely event of having been preempted here.
1284 */
1285 for (i = 4; --i; )
1286 {
1287 rtmn_diff = ev_rt_now - mn_now; 2925 rtmn_diff = ev_rt_now - mn_now;
1288 2926
1289 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2927 diff = odiff - rtmn_diff;
2928
2929 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1290 return; /* all is well */ 2930 return; /* all is well */
1291 2931
1292 ev_rt_now = ev_time (); 2932 ev_rt_now = ev_time ();
1293 mn_now = get_clock (); 2933 mn_now = get_clock ();
1294 now_floor = mn_now; 2934 now_floor = mn_now;
1295 } 2935 }
1296 2936
2937 /* no timer adjustment, as the monotonic clock doesn't jump */
2938 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1297# if EV_PERIODIC_ENABLE 2939# if EV_PERIODIC_ENABLE
1298 periodics_reschedule (EV_A); 2940 periodics_reschedule (EV_A);
1299# endif 2941# endif
1300 /* no timer adjustment, as the monotonic clock doesn't jump */
1301 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1302 }
1303 } 2942 }
1304 else 2943 else
1305#endif 2944#endif
1306 { 2945 {
1307 ev_rt_now = ev_time (); 2946 ev_rt_now = ev_time ();
1308 2947
1309 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2948 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1310 { 2949 {
2950 /* adjust timers. this is easy, as the offset is the same for all of them */
2951 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1311#if EV_PERIODIC_ENABLE 2952#if EV_PERIODIC_ENABLE
1312 periodics_reschedule (EV_A); 2953 periodics_reschedule (EV_A);
1313#endif 2954#endif
1314
1315 /* adjust timers. this is easy, as the offset is the same for all of them */
1316 for (i = 0; i < timercnt; ++i)
1317 ((WT)timers [i])->at += ev_rt_now - mn_now;
1318 } 2955 }
1319 2956
1320 mn_now = ev_rt_now; 2957 mn_now = ev_rt_now;
1321 } 2958 }
1322} 2959}
1323 2960
1324void 2961int
1325ev_ref (EV_P)
1326{
1327 ++activecnt;
1328}
1329
1330void
1331ev_unref (EV_P)
1332{
1333 --activecnt;
1334}
1335
1336static int loop_done;
1337
1338void
1339ev_loop (EV_P_ int flags) 2962ev_run (EV_P_ int flags)
1340{ 2963{
1341 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2964#if EV_FEATURE_API
1342 ? EVUNLOOP_ONE 2965 ++loop_depth;
1343 : EVUNLOOP_CANCEL; 2966#endif
1344 2967
2968 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2969
2970 loop_done = EVBREAK_CANCEL;
2971
1345 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2972 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1346 2973
1347 for (;;) 2974 do
1348 { 2975 {
2976#if EV_VERIFY >= 2
2977 ev_verify (EV_A);
2978#endif
2979
1349#ifndef _WIN32 2980#ifndef _WIN32
1350 if (expect_false (curpid)) /* penalise the forking check even more */ 2981 if (expect_false (curpid)) /* penalise the forking check even more */
1351 if (expect_false (getpid () != curpid)) 2982 if (expect_false (getpid () != curpid))
1352 { 2983 {
1353 curpid = getpid (); 2984 curpid = getpid ();
… …
1359 /* we might have forked, so queue fork handlers */ 2990 /* we might have forked, so queue fork handlers */
1360 if (expect_false (postfork)) 2991 if (expect_false (postfork))
1361 if (forkcnt) 2992 if (forkcnt)
1362 { 2993 {
1363 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2994 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1364 call_pending (EV_A); 2995 EV_INVOKE_PENDING;
1365 } 2996 }
1366#endif 2997#endif
1367 2998
2999#if EV_PREPARE_ENABLE
1368 /* queue check watchers (and execute them) */ 3000 /* queue prepare watchers (and execute them) */
1369 if (expect_false (preparecnt)) 3001 if (expect_false (preparecnt))
1370 { 3002 {
1371 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3003 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1372 call_pending (EV_A); 3004 EV_INVOKE_PENDING;
1373 } 3005 }
3006#endif
1374 3007
1375 if (expect_false (!activecnt)) 3008 if (expect_false (loop_done))
1376 break; 3009 break;
1377 3010
1378 /* we might have forked, so reify kernel state if necessary */ 3011 /* we might have forked, so reify kernel state if necessary */
1379 if (expect_false (postfork)) 3012 if (expect_false (postfork))
1380 loop_fork (EV_A); 3013 loop_fork (EV_A);
… …
1382 /* update fd-related kernel structures */ 3015 /* update fd-related kernel structures */
1383 fd_reify (EV_A); 3016 fd_reify (EV_A);
1384 3017
1385 /* calculate blocking time */ 3018 /* calculate blocking time */
1386 { 3019 {
1387 ev_tstamp block; 3020 ev_tstamp waittime = 0.;
3021 ev_tstamp sleeptime = 0.;
1388 3022
1389 if (flags & EVLOOP_NONBLOCK || idlecnt) 3023 /* remember old timestamp for io_blocktime calculation */
1390 block = 0.; /* do not block at all */ 3024 ev_tstamp prev_mn_now = mn_now;
1391 else 3025
3026 /* update time to cancel out callback processing overhead */
3027 time_update (EV_A_ 1e100);
3028
3029 /* from now on, we want a pipe-wake-up */
3030 pipe_write_wanted = 1;
3031
3032 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3033
3034 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1392 { 3035 {
1393 /* update time to cancel out callback processing overhead */
1394#if EV_USE_MONOTONIC
1395 if (expect_true (have_monotonic))
1396 time_update_monotonic (EV_A);
1397 else
1398#endif
1399 {
1400 ev_rt_now = ev_time ();
1401 mn_now = ev_rt_now;
1402 }
1403
1404 block = MAX_BLOCKTIME; 3036 waittime = MAX_BLOCKTIME;
1405 3037
1406 if (timercnt) 3038 if (timercnt)
1407 { 3039 {
1408 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3040 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1409 if (block > to) block = to; 3041 if (waittime > to) waittime = to;
1410 } 3042 }
1411 3043
1412#if EV_PERIODIC_ENABLE 3044#if EV_PERIODIC_ENABLE
1413 if (periodiccnt) 3045 if (periodiccnt)
1414 { 3046 {
1415 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3047 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1416 if (block > to) block = to; 3048 if (waittime > to) waittime = to;
1417 } 3049 }
1418#endif 3050#endif
1419 3051
3052 /* don't let timeouts decrease the waittime below timeout_blocktime */
3053 if (expect_false (waittime < timeout_blocktime))
3054 waittime = timeout_blocktime;
3055
3056 /* at this point, we NEED to wait, so we have to ensure */
3057 /* to pass a minimum nonzero value to the backend */
3058 if (expect_false (waittime < backend_mintime))
3059 waittime = backend_mintime;
3060
3061 /* extra check because io_blocktime is commonly 0 */
1420 if (expect_false (block < 0.)) block = 0.; 3062 if (expect_false (io_blocktime))
3063 {
3064 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3065
3066 if (sleeptime > waittime - backend_mintime)
3067 sleeptime = waittime - backend_mintime;
3068
3069 if (expect_true (sleeptime > 0.))
3070 {
3071 ev_sleep (sleeptime);
3072 waittime -= sleeptime;
3073 }
3074 }
1421 } 3075 }
1422 3076
3077#if EV_FEATURE_API
3078 ++loop_count;
3079#endif
3080 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1423 backend_poll (EV_A_ block); 3081 backend_poll (EV_A_ waittime);
3082 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3083
3084 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3085
3086 if (pipe_write_skipped)
3087 {
3088 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3089 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3090 }
3091
3092
3093 /* update ev_rt_now, do magic */
3094 time_update (EV_A_ waittime + sleeptime);
1424 } 3095 }
1425
1426 /* update ev_rt_now, do magic */
1427 time_update (EV_A);
1428 3096
1429 /* queue pending timers and reschedule them */ 3097 /* queue pending timers and reschedule them */
1430 timers_reify (EV_A); /* relative timers called last */ 3098 timers_reify (EV_A); /* relative timers called last */
1431#if EV_PERIODIC_ENABLE 3099#if EV_PERIODIC_ENABLE
1432 periodics_reify (EV_A); /* absolute timers called first */ 3100 periodics_reify (EV_A); /* absolute timers called first */
1433#endif 3101#endif
1434 3102
3103#if EV_IDLE_ENABLE
1435 /* queue idle watchers unless other events are pending */ 3104 /* queue idle watchers unless other events are pending */
1436 if (idlecnt && !any_pending (EV_A)) 3105 idle_reify (EV_A);
1437 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3106#endif
1438 3107
3108#if EV_CHECK_ENABLE
1439 /* queue check watchers, to be executed first */ 3109 /* queue check watchers, to be executed first */
1440 if (expect_false (checkcnt)) 3110 if (expect_false (checkcnt))
1441 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3111 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3112#endif
1442 3113
1443 call_pending (EV_A); 3114 EV_INVOKE_PENDING;
1444
1445 if (expect_false (loop_done))
1446 break;
1447 } 3115 }
3116 while (expect_true (
3117 activecnt
3118 && !loop_done
3119 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3120 ));
1448 3121
1449 if (loop_done == EVUNLOOP_ONE) 3122 if (loop_done == EVBREAK_ONE)
1450 loop_done = EVUNLOOP_CANCEL; 3123 loop_done = EVBREAK_CANCEL;
3124
3125#if EV_FEATURE_API
3126 --loop_depth;
3127#endif
3128
3129 return activecnt;
1451} 3130}
1452 3131
1453void 3132void
1454ev_unloop (EV_P_ int how) 3133ev_break (EV_P_ int how) EV_THROW
1455{ 3134{
1456 loop_done = how; 3135 loop_done = how;
1457} 3136}
1458 3137
3138void
3139ev_ref (EV_P) EV_THROW
3140{
3141 ++activecnt;
3142}
3143
3144void
3145ev_unref (EV_P) EV_THROW
3146{
3147 --activecnt;
3148}
3149
3150void
3151ev_now_update (EV_P) EV_THROW
3152{
3153 time_update (EV_A_ 1e100);
3154}
3155
3156void
3157ev_suspend (EV_P) EV_THROW
3158{
3159 ev_now_update (EV_A);
3160}
3161
3162void
3163ev_resume (EV_P) EV_THROW
3164{
3165 ev_tstamp mn_prev = mn_now;
3166
3167 ev_now_update (EV_A);
3168 timers_reschedule (EV_A_ mn_now - mn_prev);
3169#if EV_PERIODIC_ENABLE
3170 /* TODO: really do this? */
3171 periodics_reschedule (EV_A);
3172#endif
3173}
3174
1459/*****************************************************************************/ 3175/*****************************************************************************/
3176/* singly-linked list management, used when the expected list length is short */
1460 3177
1461void inline_size 3178inline_size void
1462wlist_add (WL *head, WL elem) 3179wlist_add (WL *head, WL elem)
1463{ 3180{
1464 elem->next = *head; 3181 elem->next = *head;
1465 *head = elem; 3182 *head = elem;
1466} 3183}
1467 3184
1468void inline_size 3185inline_size void
1469wlist_del (WL *head, WL elem) 3186wlist_del (WL *head, WL elem)
1470{ 3187{
1471 while (*head) 3188 while (*head)
1472 { 3189 {
1473 if (*head == elem) 3190 if (expect_true (*head == elem))
1474 { 3191 {
1475 *head = elem->next; 3192 *head = elem->next;
1476 return; 3193 break;
1477 } 3194 }
1478 3195
1479 head = &(*head)->next; 3196 head = &(*head)->next;
1480 } 3197 }
1481} 3198}
1482 3199
1483void inline_speed 3200/* internal, faster, version of ev_clear_pending */
3201inline_speed void
1484ev_clear_pending (EV_P_ W w) 3202clear_pending (EV_P_ W w)
1485{ 3203{
1486 if (w->pending) 3204 if (w->pending)
1487 { 3205 {
1488 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3206 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1489 w->pending = 0; 3207 w->pending = 0;
1490 } 3208 }
1491} 3209}
1492 3210
1493void inline_speed 3211int
3212ev_clear_pending (EV_P_ void *w) EV_THROW
3213{
3214 W w_ = (W)w;
3215 int pending = w_->pending;
3216
3217 if (expect_true (pending))
3218 {
3219 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3220 p->w = (W)&pending_w;
3221 w_->pending = 0;
3222 return p->events;
3223 }
3224 else
3225 return 0;
3226}
3227
3228inline_size void
3229pri_adjust (EV_P_ W w)
3230{
3231 int pri = ev_priority (w);
3232 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3233 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3234 ev_set_priority (w, pri);
3235}
3236
3237inline_speed void
1494ev_start (EV_P_ W w, int active) 3238ev_start (EV_P_ W w, int active)
1495{ 3239{
1496 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3240 pri_adjust (EV_A_ w);
1497 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1498
1499 w->active = active; 3241 w->active = active;
1500 ev_ref (EV_A); 3242 ev_ref (EV_A);
1501} 3243}
1502 3244
1503void inline_size 3245inline_size void
1504ev_stop (EV_P_ W w) 3246ev_stop (EV_P_ W w)
1505{ 3247{
1506 ev_unref (EV_A); 3248 ev_unref (EV_A);
1507 w->active = 0; 3249 w->active = 0;
1508} 3250}
1509 3251
1510/*****************************************************************************/ 3252/*****************************************************************************/
1511 3253
1512void 3254void noinline
1513ev_io_start (EV_P_ ev_io *w) 3255ev_io_start (EV_P_ ev_io *w) EV_THROW
1514{ 3256{
1515 int fd = w->fd; 3257 int fd = w->fd;
1516 3258
1517 if (expect_false (ev_is_active (w))) 3259 if (expect_false (ev_is_active (w)))
1518 return; 3260 return;
1519 3261
1520 assert (("ev_io_start called with negative fd", fd >= 0)); 3262 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3263 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3264
3265 EV_FREQUENT_CHECK;
1521 3266
1522 ev_start (EV_A_ (W)w, 1); 3267 ev_start (EV_A_ (W)w, 1);
1523 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3268 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1524 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3269 wlist_add (&anfds[fd].head, (WL)w);
1525 3270
1526 fd_change (EV_A_ fd); 3271 /* common bug, apparently */
1527} 3272 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
1528 3273
1529void 3274 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3275 w->events &= ~EV__IOFDSET;
3276
3277 EV_FREQUENT_CHECK;
3278}
3279
3280void noinline
1530ev_io_stop (EV_P_ ev_io *w) 3281ev_io_stop (EV_P_ ev_io *w) EV_THROW
1531{ 3282{
1532 ev_clear_pending (EV_A_ (W)w); 3283 clear_pending (EV_A_ (W)w);
1533 if (expect_false (!ev_is_active (w))) 3284 if (expect_false (!ev_is_active (w)))
1534 return; 3285 return;
1535 3286
1536 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3287 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1537 3288
3289 EV_FREQUENT_CHECK;
3290
1538 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3291 wlist_del (&anfds[w->fd].head, (WL)w);
1539 ev_stop (EV_A_ (W)w); 3292 ev_stop (EV_A_ (W)w);
1540 3293
1541 fd_change (EV_A_ w->fd); 3294 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1542}
1543 3295
1544void 3296 EV_FREQUENT_CHECK;
3297}
3298
3299void noinline
1545ev_timer_start (EV_P_ ev_timer *w) 3300ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1546{ 3301{
1547 if (expect_false (ev_is_active (w))) 3302 if (expect_false (ev_is_active (w)))
1548 return; 3303 return;
1549 3304
1550 ((WT)w)->at += mn_now; 3305 ev_at (w) += mn_now;
1551 3306
1552 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3307 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1553 3308
3309 EV_FREQUENT_CHECK;
3310
3311 ++timercnt;
1554 ev_start (EV_A_ (W)w, ++timercnt); 3312 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1555 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 3313 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1556 timers [timercnt - 1] = w; 3314 ANHE_w (timers [ev_active (w)]) = (WT)w;
1557 upheap ((WT *)timers, timercnt - 1); 3315 ANHE_at_cache (timers [ev_active (w)]);
3316 upheap (timers, ev_active (w));
1558 3317
3318 EV_FREQUENT_CHECK;
3319
1559 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3320 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1560} 3321}
1561 3322
1562void 3323void noinline
1563ev_timer_stop (EV_P_ ev_timer *w) 3324ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1564{ 3325{
1565 ev_clear_pending (EV_A_ (W)w); 3326 clear_pending (EV_A_ (W)w);
1566 if (expect_false (!ev_is_active (w))) 3327 if (expect_false (!ev_is_active (w)))
1567 return; 3328 return;
1568 3329
1569 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3330 EV_FREQUENT_CHECK;
1570 3331
1571 { 3332 {
1572 int active = ((W)w)->active; 3333 int active = ev_active (w);
1573 3334
3335 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3336
3337 --timercnt;
3338
1574 if (expect_true (--active < --timercnt)) 3339 if (expect_true (active < timercnt + HEAP0))
1575 { 3340 {
1576 timers [active] = timers [timercnt]; 3341 timers [active] = timers [timercnt + HEAP0];
1577 adjustheap ((WT *)timers, timercnt, active); 3342 adjustheap (timers, timercnt, active);
1578 } 3343 }
1579 } 3344 }
1580 3345
1581 ((WT)w)->at -= mn_now; 3346 ev_at (w) -= mn_now;
1582 3347
1583 ev_stop (EV_A_ (W)w); 3348 ev_stop (EV_A_ (W)w);
1584}
1585 3349
1586void 3350 EV_FREQUENT_CHECK;
3351}
3352
3353void noinline
1587ev_timer_again (EV_P_ ev_timer *w) 3354ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1588{ 3355{
3356 EV_FREQUENT_CHECK;
3357
3358 clear_pending (EV_A_ (W)w);
3359
1589 if (ev_is_active (w)) 3360 if (ev_is_active (w))
1590 { 3361 {
1591 if (w->repeat) 3362 if (w->repeat)
1592 { 3363 {
1593 ((WT)w)->at = mn_now + w->repeat; 3364 ev_at (w) = mn_now + w->repeat;
3365 ANHE_at_cache (timers [ev_active (w)]);
1594 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3366 adjustheap (timers, timercnt, ev_active (w));
1595 } 3367 }
1596 else 3368 else
1597 ev_timer_stop (EV_A_ w); 3369 ev_timer_stop (EV_A_ w);
1598 } 3370 }
1599 else if (w->repeat) 3371 else if (w->repeat)
1600 { 3372 {
1601 w->at = w->repeat; 3373 ev_at (w) = w->repeat;
1602 ev_timer_start (EV_A_ w); 3374 ev_timer_start (EV_A_ w);
1603 } 3375 }
3376
3377 EV_FREQUENT_CHECK;
3378}
3379
3380ev_tstamp
3381ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3382{
3383 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1604} 3384}
1605 3385
1606#if EV_PERIODIC_ENABLE 3386#if EV_PERIODIC_ENABLE
1607void 3387void noinline
1608ev_periodic_start (EV_P_ ev_periodic *w) 3388ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1609{ 3389{
1610 if (expect_false (ev_is_active (w))) 3390 if (expect_false (ev_is_active (w)))
1611 return; 3391 return;
1612 3392
1613 if (w->reschedule_cb) 3393 if (w->reschedule_cb)
1614 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3394 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1615 else if (w->interval) 3395 else if (w->interval)
1616 { 3396 {
1617 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3397 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1618 /* this formula differs from the one in periodic_reify because we do not always round up */ 3398 periodic_recalc (EV_A_ w);
1619 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1620 } 3399 }
3400 else
3401 ev_at (w) = w->offset;
1621 3402
3403 EV_FREQUENT_CHECK;
3404
3405 ++periodiccnt;
1622 ev_start (EV_A_ (W)w, ++periodiccnt); 3406 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1623 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3407 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1624 periodics [periodiccnt - 1] = w; 3408 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1625 upheap ((WT *)periodics, periodiccnt - 1); 3409 ANHE_at_cache (periodics [ev_active (w)]);
3410 upheap (periodics, ev_active (w));
1626 3411
3412 EV_FREQUENT_CHECK;
3413
1627 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3414 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1628} 3415}
1629 3416
1630void 3417void noinline
1631ev_periodic_stop (EV_P_ ev_periodic *w) 3418ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1632{ 3419{
1633 ev_clear_pending (EV_A_ (W)w); 3420 clear_pending (EV_A_ (W)w);
1634 if (expect_false (!ev_is_active (w))) 3421 if (expect_false (!ev_is_active (w)))
1635 return; 3422 return;
1636 3423
1637 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3424 EV_FREQUENT_CHECK;
1638 3425
1639 { 3426 {
1640 int active = ((W)w)->active; 3427 int active = ev_active (w);
1641 3428
3429 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3430
3431 --periodiccnt;
3432
1642 if (expect_true (--active < --periodiccnt)) 3433 if (expect_true (active < periodiccnt + HEAP0))
1643 { 3434 {
1644 periodics [active] = periodics [periodiccnt]; 3435 periodics [active] = periodics [periodiccnt + HEAP0];
1645 adjustheap ((WT *)periodics, periodiccnt, active); 3436 adjustheap (periodics, periodiccnt, active);
1646 } 3437 }
1647 } 3438 }
1648 3439
1649 ev_stop (EV_A_ (W)w); 3440 ev_stop (EV_A_ (W)w);
1650}
1651 3441
1652void 3442 EV_FREQUENT_CHECK;
3443}
3444
3445void noinline
1653ev_periodic_again (EV_P_ ev_periodic *w) 3446ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1654{ 3447{
1655 /* TODO: use adjustheap and recalculation */ 3448 /* TODO: use adjustheap and recalculation */
1656 ev_periodic_stop (EV_A_ w); 3449 ev_periodic_stop (EV_A_ w);
1657 ev_periodic_start (EV_A_ w); 3450 ev_periodic_start (EV_A_ w);
1658} 3451}
… …
1660 3453
1661#ifndef SA_RESTART 3454#ifndef SA_RESTART
1662# define SA_RESTART 0 3455# define SA_RESTART 0
1663#endif 3456#endif
1664 3457
1665void 3458#if EV_SIGNAL_ENABLE
3459
3460void noinline
1666ev_signal_start (EV_P_ ev_signal *w) 3461ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1667{ 3462{
1668#if EV_MULTIPLICITY
1669 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1670#endif
1671 if (expect_false (ev_is_active (w))) 3463 if (expect_false (ev_is_active (w)))
1672 return; 3464 return;
1673 3465
1674 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3466 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3467
3468#if EV_MULTIPLICITY
3469 assert (("libev: a signal must not be attached to two different loops",
3470 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3471
3472 signals [w->signum - 1].loop = EV_A;
3473#endif
3474
3475 EV_FREQUENT_CHECK;
3476
3477#if EV_USE_SIGNALFD
3478 if (sigfd == -2)
3479 {
3480 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3481 if (sigfd < 0 && errno == EINVAL)
3482 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3483
3484 if (sigfd >= 0)
3485 {
3486 fd_intern (sigfd); /* doing it twice will not hurt */
3487
3488 sigemptyset (&sigfd_set);
3489
3490 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3491 ev_set_priority (&sigfd_w, EV_MAXPRI);
3492 ev_io_start (EV_A_ &sigfd_w);
3493 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3494 }
3495 }
3496
3497 if (sigfd >= 0)
3498 {
3499 /* TODO: check .head */
3500 sigaddset (&sigfd_set, w->signum);
3501 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3502
3503 signalfd (sigfd, &sigfd_set, 0);
3504 }
3505#endif
1675 3506
1676 ev_start (EV_A_ (W)w, 1); 3507 ev_start (EV_A_ (W)w, 1);
1677 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1678 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3508 wlist_add (&signals [w->signum - 1].head, (WL)w);
1679 3509
1680 if (!((WL)w)->next) 3510 if (!((WL)w)->next)
3511# if EV_USE_SIGNALFD
3512 if (sigfd < 0) /*TODO*/
3513# endif
1681 { 3514 {
1682#if _WIN32 3515# ifdef _WIN32
3516 evpipe_init (EV_A);
3517
1683 signal (w->signum, sighandler); 3518 signal (w->signum, ev_sighandler);
1684#else 3519# else
1685 struct sigaction sa; 3520 struct sigaction sa;
3521
3522 evpipe_init (EV_A);
3523
1686 sa.sa_handler = sighandler; 3524 sa.sa_handler = ev_sighandler;
1687 sigfillset (&sa.sa_mask); 3525 sigfillset (&sa.sa_mask);
1688 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3526 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1689 sigaction (w->signum, &sa, 0); 3527 sigaction (w->signum, &sa, 0);
3528
3529 if (origflags & EVFLAG_NOSIGMASK)
3530 {
3531 sigemptyset (&sa.sa_mask);
3532 sigaddset (&sa.sa_mask, w->signum);
3533 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3534 }
1690#endif 3535#endif
1691 } 3536 }
1692}
1693 3537
1694void 3538 EV_FREQUENT_CHECK;
3539}
3540
3541void noinline
1695ev_signal_stop (EV_P_ ev_signal *w) 3542ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1696{ 3543{
1697 ev_clear_pending (EV_A_ (W)w); 3544 clear_pending (EV_A_ (W)w);
1698 if (expect_false (!ev_is_active (w))) 3545 if (expect_false (!ev_is_active (w)))
1699 return; 3546 return;
1700 3547
3548 EV_FREQUENT_CHECK;
3549
1701 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3550 wlist_del (&signals [w->signum - 1].head, (WL)w);
1702 ev_stop (EV_A_ (W)w); 3551 ev_stop (EV_A_ (W)w);
1703 3552
1704 if (!signals [w->signum - 1].head) 3553 if (!signals [w->signum - 1].head)
3554 {
3555#if EV_MULTIPLICITY
3556 signals [w->signum - 1].loop = 0; /* unattach from signal */
3557#endif
3558#if EV_USE_SIGNALFD
3559 if (sigfd >= 0)
3560 {
3561 sigset_t ss;
3562
3563 sigemptyset (&ss);
3564 sigaddset (&ss, w->signum);
3565 sigdelset (&sigfd_set, w->signum);
3566
3567 signalfd (sigfd, &sigfd_set, 0);
3568 sigprocmask (SIG_UNBLOCK, &ss, 0);
3569 }
3570 else
3571#endif
1705 signal (w->signum, SIG_DFL); 3572 signal (w->signum, SIG_DFL);
3573 }
3574
3575 EV_FREQUENT_CHECK;
1706} 3576}
3577
3578#endif
3579
3580#if EV_CHILD_ENABLE
1707 3581
1708void 3582void
1709ev_child_start (EV_P_ ev_child *w) 3583ev_child_start (EV_P_ ev_child *w) EV_THROW
1710{ 3584{
1711#if EV_MULTIPLICITY 3585#if EV_MULTIPLICITY
1712 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3586 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1713#endif 3587#endif
1714 if (expect_false (ev_is_active (w))) 3588 if (expect_false (ev_is_active (w)))
1715 return; 3589 return;
1716 3590
3591 EV_FREQUENT_CHECK;
3592
1717 ev_start (EV_A_ (W)w, 1); 3593 ev_start (EV_A_ (W)w, 1);
1718 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3594 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3595
3596 EV_FREQUENT_CHECK;
1719} 3597}
1720 3598
1721void 3599void
1722ev_child_stop (EV_P_ ev_child *w) 3600ev_child_stop (EV_P_ ev_child *w) EV_THROW
1723{ 3601{
1724 ev_clear_pending (EV_A_ (W)w); 3602 clear_pending (EV_A_ (W)w);
1725 if (expect_false (!ev_is_active (w))) 3603 if (expect_false (!ev_is_active (w)))
1726 return; 3604 return;
1727 3605
3606 EV_FREQUENT_CHECK;
3607
1728 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3608 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1729 ev_stop (EV_A_ (W)w); 3609 ev_stop (EV_A_ (W)w);
3610
3611 EV_FREQUENT_CHECK;
1730} 3612}
3613
3614#endif
1731 3615
1732#if EV_STAT_ENABLE 3616#if EV_STAT_ENABLE
1733 3617
1734# ifdef _WIN32 3618# ifdef _WIN32
1735# undef lstat 3619# undef lstat
1736# define lstat(a,b) _stati64 (a,b) 3620# define lstat(a,b) _stati64 (a,b)
1737# endif 3621# endif
1738 3622
1739#define DEF_STAT_INTERVAL 5.0074891 3623#define DEF_STAT_INTERVAL 5.0074891
3624#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1740#define MIN_STAT_INTERVAL 0.1074891 3625#define MIN_STAT_INTERVAL 0.1074891
1741 3626
1742static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3627static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1743 3628
1744#if EV_USE_INOTIFY 3629#if EV_USE_INOTIFY
1745# define EV_INOTIFY_BUFSIZE 8192 3630
3631/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3632# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1746 3633
1747static void noinline 3634static void noinline
1748infy_add (EV_P_ ev_stat *w) 3635infy_add (EV_P_ ev_stat *w)
1749{ 3636{
1750 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); 3637 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);
1751 3638
1752 if (w->wd < 0) 3639 if (w->wd >= 0)
3640 {
3641 struct statfs sfs;
3642
3643 /* now local changes will be tracked by inotify, but remote changes won't */
3644 /* unless the filesystem is known to be local, we therefore still poll */
3645 /* also do poll on <2.6.25, but with normal frequency */
3646
3647 if (!fs_2625)
3648 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3649 else if (!statfs (w->path, &sfs)
3650 && (sfs.f_type == 0x1373 /* devfs */
3651 || sfs.f_type == 0xEF53 /* ext2/3 */
3652 || sfs.f_type == 0x3153464a /* jfs */
3653 || sfs.f_type == 0x52654973 /* reiser3 */
3654 || sfs.f_type == 0x01021994 /* tempfs */
3655 || sfs.f_type == 0x58465342 /* xfs */))
3656 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3657 else
3658 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1753 { 3659 }
1754 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3660 else
3661 {
3662 /* can't use inotify, continue to stat */
3663 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1755 3664
1756 /* monitor some parent directory for speedup hints */ 3665 /* if path is not there, monitor some parent directory for speedup hints */
3666 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3667 /* but an efficiency issue only */
1757 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3668 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1758 { 3669 {
1759 char path [4096]; 3670 char path [4096];
1760 strcpy (path, w->path); 3671 strcpy (path, w->path);
1761 3672
… …
1764 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3675 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1765 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3676 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1766 3677
1767 char *pend = strrchr (path, '/'); 3678 char *pend = strrchr (path, '/');
1768 3679
1769 if (!pend) 3680 if (!pend || pend == path)
1770 break; /* whoops, no '/', complain to your admin */ 3681 break;
1771 3682
1772 *pend = 0; 3683 *pend = 0;
1773 w->wd = inotify_add_watch (fs_fd, path, mask); 3684 w->wd = inotify_add_watch (fs_fd, path, mask);
1774 } 3685 }
1775 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3686 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1776 } 3687 }
1777 } 3688 }
1778 else
1779 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1780 3689
1781 if (w->wd >= 0) 3690 if (w->wd >= 0)
1782 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3691 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3692
3693 /* now re-arm timer, if required */
3694 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3695 ev_timer_again (EV_A_ &w->timer);
3696 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1783} 3697}
1784 3698
1785static void noinline 3699static void noinline
1786infy_del (EV_P_ ev_stat *w) 3700infy_del (EV_P_ ev_stat *w)
1787{ 3701{
… …
1790 3704
1791 if (wd < 0) 3705 if (wd < 0)
1792 return; 3706 return;
1793 3707
1794 w->wd = -2; 3708 w->wd = -2;
1795 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3709 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1796 wlist_del (&fs_hash [slot].head, (WL)w); 3710 wlist_del (&fs_hash [slot].head, (WL)w);
1797 3711
1798 /* remove this watcher, if others are watching it, they will rearm */ 3712 /* remove this watcher, if others are watching it, they will rearm */
1799 inotify_rm_watch (fs_fd, wd); 3713 inotify_rm_watch (fs_fd, wd);
1800} 3714}
1801 3715
1802static void noinline 3716static void noinline
1803infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3717infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1804{ 3718{
1805 if (slot < 0) 3719 if (slot < 0)
1806 /* overflow, need to check for all hahs slots */ 3720 /* overflow, need to check for all hash slots */
1807 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3721 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1808 infy_wd (EV_A_ slot, wd, ev); 3722 infy_wd (EV_A_ slot, wd, ev);
1809 else 3723 else
1810 { 3724 {
1811 WL w_; 3725 WL w_;
1812 3726
1813 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3727 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1814 { 3728 {
1815 ev_stat *w = (ev_stat *)w_; 3729 ev_stat *w = (ev_stat *)w_;
1816 w_ = w_->next; /* lets us remove this watcher and all before it */ 3730 w_ = w_->next; /* lets us remove this watcher and all before it */
1817 3731
1818 if (w->wd == wd || wd == -1) 3732 if (w->wd == wd || wd == -1)
1819 { 3733 {
1820 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3734 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1821 { 3735 {
3736 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1822 w->wd = -1; 3737 w->wd = -1;
1823 infy_add (EV_A_ w); /* re-add, no matter what */ 3738 infy_add (EV_A_ w); /* re-add, no matter what */
1824 } 3739 }
1825 3740
1826 stat_timer_cb (EV_A_ &w->timer, 0); 3741 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1831 3746
1832static void 3747static void
1833infy_cb (EV_P_ ev_io *w, int revents) 3748infy_cb (EV_P_ ev_io *w, int revents)
1834{ 3749{
1835 char buf [EV_INOTIFY_BUFSIZE]; 3750 char buf [EV_INOTIFY_BUFSIZE];
1836 struct inotify_event *ev = (struct inotify_event *)buf;
1837 int ofs; 3751 int ofs;
1838 int len = read (fs_fd, buf, sizeof (buf)); 3752 int len = read (fs_fd, buf, sizeof (buf));
1839 3753
1840 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3754 for (ofs = 0; ofs < len; )
3755 {
3756 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1841 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3757 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3758 ofs += sizeof (struct inotify_event) + ev->len;
3759 }
1842} 3760}
1843 3761
1844void inline_size 3762inline_size void ecb_cold
3763ev_check_2625 (EV_P)
3764{
3765 /* kernels < 2.6.25 are borked
3766 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3767 */
3768 if (ev_linux_version () < 0x020619)
3769 return;
3770
3771 fs_2625 = 1;
3772}
3773
3774inline_size int
3775infy_newfd (void)
3776{
3777#if defined IN_CLOEXEC && defined IN_NONBLOCK
3778 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3779 if (fd >= 0)
3780 return fd;
3781#endif
3782 return inotify_init ();
3783}
3784
3785inline_size void
1845infy_init (EV_P) 3786infy_init (EV_P)
1846{ 3787{
1847 if (fs_fd != -2) 3788 if (fs_fd != -2)
1848 return; 3789 return;
1849 3790
3791 fs_fd = -1;
3792
3793 ev_check_2625 (EV_A);
3794
1850 fs_fd = inotify_init (); 3795 fs_fd = infy_newfd ();
1851 3796
1852 if (fs_fd >= 0) 3797 if (fs_fd >= 0)
1853 { 3798 {
3799 fd_intern (fs_fd);
1854 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3800 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1855 ev_set_priority (&fs_w, EV_MAXPRI); 3801 ev_set_priority (&fs_w, EV_MAXPRI);
1856 ev_io_start (EV_A_ &fs_w); 3802 ev_io_start (EV_A_ &fs_w);
3803 ev_unref (EV_A);
1857 } 3804 }
1858} 3805}
1859 3806
1860void inline_size 3807inline_size void
1861infy_fork (EV_P) 3808infy_fork (EV_P)
1862{ 3809{
1863 int slot; 3810 int slot;
1864 3811
1865 if (fs_fd < 0) 3812 if (fs_fd < 0)
1866 return; 3813 return;
1867 3814
3815 ev_ref (EV_A);
3816 ev_io_stop (EV_A_ &fs_w);
1868 close (fs_fd); 3817 close (fs_fd);
1869 fs_fd = inotify_init (); 3818 fs_fd = infy_newfd ();
1870 3819
3820 if (fs_fd >= 0)
3821 {
3822 fd_intern (fs_fd);
3823 ev_io_set (&fs_w, fs_fd, EV_READ);
3824 ev_io_start (EV_A_ &fs_w);
3825 ev_unref (EV_A);
3826 }
3827
1871 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3828 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1872 { 3829 {
1873 WL w_ = fs_hash [slot].head; 3830 WL w_ = fs_hash [slot].head;
1874 fs_hash [slot].head = 0; 3831 fs_hash [slot].head = 0;
1875 3832
1876 while (w_) 3833 while (w_)
… …
1881 w->wd = -1; 3838 w->wd = -1;
1882 3839
1883 if (fs_fd >= 0) 3840 if (fs_fd >= 0)
1884 infy_add (EV_A_ w); /* re-add, no matter what */ 3841 infy_add (EV_A_ w); /* re-add, no matter what */
1885 else 3842 else
3843 {
3844 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3845 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1886 ev_timer_start (EV_A_ &w->timer); 3846 ev_timer_again (EV_A_ &w->timer);
3847 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3848 }
1887 } 3849 }
1888
1889 } 3850 }
1890} 3851}
1891 3852
3853#endif
3854
3855#ifdef _WIN32
3856# define EV_LSTAT(p,b) _stati64 (p, b)
3857#else
3858# define EV_LSTAT(p,b) lstat (p, b)
1892#endif 3859#endif
1893 3860
1894void 3861void
1895ev_stat_stat (EV_P_ ev_stat *w) 3862ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1896{ 3863{
1897 if (lstat (w->path, &w->attr) < 0) 3864 if (lstat (w->path, &w->attr) < 0)
1898 w->attr.st_nlink = 0; 3865 w->attr.st_nlink = 0;
1899 else if (!w->attr.st_nlink) 3866 else if (!w->attr.st_nlink)
1900 w->attr.st_nlink = 1; 3867 w->attr.st_nlink = 1;
… …
1903static void noinline 3870static void noinline
1904stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3871stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1905{ 3872{
1906 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3873 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1907 3874
1908 /* we copy this here each the time so that */ 3875 ev_statdata prev = w->attr;
1909 /* prev has the old value when the callback gets invoked */
1910 w->prev = w->attr;
1911 ev_stat_stat (EV_A_ w); 3876 ev_stat_stat (EV_A_ w);
1912 3877
1913 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3878 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1914 if ( 3879 if (
1915 w->prev.st_dev != w->attr.st_dev 3880 prev.st_dev != w->attr.st_dev
1916 || w->prev.st_ino != w->attr.st_ino 3881 || prev.st_ino != w->attr.st_ino
1917 || w->prev.st_mode != w->attr.st_mode 3882 || prev.st_mode != w->attr.st_mode
1918 || w->prev.st_nlink != w->attr.st_nlink 3883 || prev.st_nlink != w->attr.st_nlink
1919 || w->prev.st_uid != w->attr.st_uid 3884 || prev.st_uid != w->attr.st_uid
1920 || w->prev.st_gid != w->attr.st_gid 3885 || prev.st_gid != w->attr.st_gid
1921 || w->prev.st_rdev != w->attr.st_rdev 3886 || prev.st_rdev != w->attr.st_rdev
1922 || w->prev.st_size != w->attr.st_size 3887 || prev.st_size != w->attr.st_size
1923 || w->prev.st_atime != w->attr.st_atime 3888 || prev.st_atime != w->attr.st_atime
1924 || w->prev.st_mtime != w->attr.st_mtime 3889 || prev.st_mtime != w->attr.st_mtime
1925 || w->prev.st_ctime != w->attr.st_ctime 3890 || prev.st_ctime != w->attr.st_ctime
1926 ) { 3891 ) {
3892 /* we only update w->prev on actual differences */
3893 /* in case we test more often than invoke the callback, */
3894 /* to ensure that prev is always different to attr */
3895 w->prev = prev;
3896
1927 #if EV_USE_INOTIFY 3897 #if EV_USE_INOTIFY
3898 if (fs_fd >= 0)
3899 {
1928 infy_del (EV_A_ w); 3900 infy_del (EV_A_ w);
1929 infy_add (EV_A_ w); 3901 infy_add (EV_A_ w);
1930 ev_stat_stat (EV_A_ w); /* avoid race... */ 3902 ev_stat_stat (EV_A_ w); /* avoid race... */
3903 }
1931 #endif 3904 #endif
1932 3905
1933 ev_feed_event (EV_A_ w, EV_STAT); 3906 ev_feed_event (EV_A_ w, EV_STAT);
1934 } 3907 }
1935} 3908}
1936 3909
1937void 3910void
1938ev_stat_start (EV_P_ ev_stat *w) 3911ev_stat_start (EV_P_ ev_stat *w) EV_THROW
1939{ 3912{
1940 if (expect_false (ev_is_active (w))) 3913 if (expect_false (ev_is_active (w)))
1941 return; 3914 return;
1942 3915
1943 /* since we use memcmp, we need to clear any padding data etc. */
1944 memset (&w->prev, 0, sizeof (ev_statdata));
1945 memset (&w->attr, 0, sizeof (ev_statdata));
1946
1947 ev_stat_stat (EV_A_ w); 3916 ev_stat_stat (EV_A_ w);
1948 3917
3918 if (w->interval < MIN_STAT_INTERVAL && w->interval)
1949 if (w->interval < MIN_STAT_INTERVAL) 3919 w->interval = MIN_STAT_INTERVAL;
1950 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1951 3920
1952 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3921 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
1953 ev_set_priority (&w->timer, ev_priority (w)); 3922 ev_set_priority (&w->timer, ev_priority (w));
1954 3923
1955#if EV_USE_INOTIFY 3924#if EV_USE_INOTIFY
1956 infy_init (EV_A); 3925 infy_init (EV_A);
1957 3926
1958 if (fs_fd >= 0) 3927 if (fs_fd >= 0)
1959 infy_add (EV_A_ w); 3928 infy_add (EV_A_ w);
1960 else 3929 else
1961#endif 3930#endif
3931 {
1962 ev_timer_start (EV_A_ &w->timer); 3932 ev_timer_again (EV_A_ &w->timer);
3933 ev_unref (EV_A);
3934 }
1963 3935
1964 ev_start (EV_A_ (W)w, 1); 3936 ev_start (EV_A_ (W)w, 1);
3937
3938 EV_FREQUENT_CHECK;
1965} 3939}
1966 3940
1967void 3941void
1968ev_stat_stop (EV_P_ ev_stat *w) 3942ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
1969{ 3943{
1970 ev_clear_pending (EV_A_ (W)w); 3944 clear_pending (EV_A_ (W)w);
1971 if (expect_false (!ev_is_active (w))) 3945 if (expect_false (!ev_is_active (w)))
1972 return; 3946 return;
1973 3947
3948 EV_FREQUENT_CHECK;
3949
1974#if EV_USE_INOTIFY 3950#if EV_USE_INOTIFY
1975 infy_del (EV_A_ w); 3951 infy_del (EV_A_ w);
1976#endif 3952#endif
3953
3954 if (ev_is_active (&w->timer))
3955 {
3956 ev_ref (EV_A);
1977 ev_timer_stop (EV_A_ &w->timer); 3957 ev_timer_stop (EV_A_ &w->timer);
3958 }
1978 3959
1979 ev_stop (EV_A_ (W)w); 3960 ev_stop (EV_A_ (W)w);
1980}
1981#endif
1982 3961
3962 EV_FREQUENT_CHECK;
3963}
3964#endif
3965
3966#if EV_IDLE_ENABLE
1983void 3967void
1984ev_idle_start (EV_P_ ev_idle *w) 3968ev_idle_start (EV_P_ ev_idle *w) EV_THROW
1985{ 3969{
1986 if (expect_false (ev_is_active (w))) 3970 if (expect_false (ev_is_active (w)))
1987 return; 3971 return;
1988 3972
3973 pri_adjust (EV_A_ (W)w);
3974
3975 EV_FREQUENT_CHECK;
3976
3977 {
3978 int active = ++idlecnt [ABSPRI (w)];
3979
3980 ++idleall;
1989 ev_start (EV_A_ (W)w, ++idlecnt); 3981 ev_start (EV_A_ (W)w, active);
3982
1990 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 3983 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1991 idles [idlecnt - 1] = w; 3984 idles [ABSPRI (w)][active - 1] = w;
3985 }
3986
3987 EV_FREQUENT_CHECK;
1992} 3988}
1993 3989
1994void 3990void
1995ev_idle_stop (EV_P_ ev_idle *w) 3991ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
1996{ 3992{
1997 ev_clear_pending (EV_A_ (W)w); 3993 clear_pending (EV_A_ (W)w);
1998 if (expect_false (!ev_is_active (w))) 3994 if (expect_false (!ev_is_active (w)))
1999 return; 3995 return;
2000 3996
3997 EV_FREQUENT_CHECK;
3998
2001 { 3999 {
2002 int active = ((W)w)->active; 4000 int active = ev_active (w);
2003 idles [active - 1] = idles [--idlecnt]; 4001
2004 ((W)idles [active - 1])->active = active; 4002 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4003 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4004
4005 ev_stop (EV_A_ (W)w);
4006 --idleall;
2005 } 4007 }
2006 4008
2007 ev_stop (EV_A_ (W)w); 4009 EV_FREQUENT_CHECK;
2008} 4010}
4011#endif
2009 4012
4013#if EV_PREPARE_ENABLE
2010void 4014void
2011ev_prepare_start (EV_P_ ev_prepare *w) 4015ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2012{ 4016{
2013 if (expect_false (ev_is_active (w))) 4017 if (expect_false (ev_is_active (w)))
2014 return; 4018 return;
4019
4020 EV_FREQUENT_CHECK;
2015 4021
2016 ev_start (EV_A_ (W)w, ++preparecnt); 4022 ev_start (EV_A_ (W)w, ++preparecnt);
2017 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4023 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2018 prepares [preparecnt - 1] = w; 4024 prepares [preparecnt - 1] = w;
4025
4026 EV_FREQUENT_CHECK;
2019} 4027}
2020 4028
2021void 4029void
2022ev_prepare_stop (EV_P_ ev_prepare *w) 4030ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2023{ 4031{
2024 ev_clear_pending (EV_A_ (W)w); 4032 clear_pending (EV_A_ (W)w);
2025 if (expect_false (!ev_is_active (w))) 4033 if (expect_false (!ev_is_active (w)))
2026 return; 4034 return;
2027 4035
4036 EV_FREQUENT_CHECK;
4037
2028 { 4038 {
2029 int active = ((W)w)->active; 4039 int active = ev_active (w);
4040
2030 prepares [active - 1] = prepares [--preparecnt]; 4041 prepares [active - 1] = prepares [--preparecnt];
2031 ((W)prepares [active - 1])->active = active; 4042 ev_active (prepares [active - 1]) = active;
2032 } 4043 }
2033 4044
2034 ev_stop (EV_A_ (W)w); 4045 ev_stop (EV_A_ (W)w);
2035}
2036 4046
4047 EV_FREQUENT_CHECK;
4048}
4049#endif
4050
4051#if EV_CHECK_ENABLE
2037void 4052void
2038ev_check_start (EV_P_ ev_check *w) 4053ev_check_start (EV_P_ ev_check *w) EV_THROW
2039{ 4054{
2040 if (expect_false (ev_is_active (w))) 4055 if (expect_false (ev_is_active (w)))
2041 return; 4056 return;
4057
4058 EV_FREQUENT_CHECK;
2042 4059
2043 ev_start (EV_A_ (W)w, ++checkcnt); 4060 ev_start (EV_A_ (W)w, ++checkcnt);
2044 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4061 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2045 checks [checkcnt - 1] = w; 4062 checks [checkcnt - 1] = w;
4063
4064 EV_FREQUENT_CHECK;
2046} 4065}
2047 4066
2048void 4067void
2049ev_check_stop (EV_P_ ev_check *w) 4068ev_check_stop (EV_P_ ev_check *w) EV_THROW
2050{ 4069{
2051 ev_clear_pending (EV_A_ (W)w); 4070 clear_pending (EV_A_ (W)w);
2052 if (expect_false (!ev_is_active (w))) 4071 if (expect_false (!ev_is_active (w)))
2053 return; 4072 return;
2054 4073
4074 EV_FREQUENT_CHECK;
4075
2055 { 4076 {
2056 int active = ((W)w)->active; 4077 int active = ev_active (w);
4078
2057 checks [active - 1] = checks [--checkcnt]; 4079 checks [active - 1] = checks [--checkcnt];
2058 ((W)checks [active - 1])->active = active; 4080 ev_active (checks [active - 1]) = active;
2059 } 4081 }
2060 4082
2061 ev_stop (EV_A_ (W)w); 4083 ev_stop (EV_A_ (W)w);
4084
4085 EV_FREQUENT_CHECK;
2062} 4086}
4087#endif
2063 4088
2064#if EV_EMBED_ENABLE 4089#if EV_EMBED_ENABLE
2065void noinline 4090void noinline
2066ev_embed_sweep (EV_P_ ev_embed *w) 4091ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2067{ 4092{
2068 ev_loop (w->loop, EVLOOP_NONBLOCK); 4093 ev_run (w->other, EVRUN_NOWAIT);
2069} 4094}
2070 4095
2071static void 4096static void
2072embed_cb (EV_P_ ev_io *io, int revents) 4097embed_io_cb (EV_P_ ev_io *io, int revents)
2073{ 4098{
2074 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4099 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2075 4100
2076 if (ev_cb (w)) 4101 if (ev_cb (w))
2077 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4102 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2078 else 4103 else
2079 ev_embed_sweep (loop, w); 4104 ev_run (w->other, EVRUN_NOWAIT);
2080} 4105}
4106
4107static void
4108embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4109{
4110 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4111
4112 {
4113 EV_P = w->other;
4114
4115 while (fdchangecnt)
4116 {
4117 fd_reify (EV_A);
4118 ev_run (EV_A_ EVRUN_NOWAIT);
4119 }
4120 }
4121}
4122
4123static void
4124embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4125{
4126 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4127
4128 ev_embed_stop (EV_A_ w);
4129
4130 {
4131 EV_P = w->other;
4132
4133 ev_loop_fork (EV_A);
4134 ev_run (EV_A_ EVRUN_NOWAIT);
4135 }
4136
4137 ev_embed_start (EV_A_ w);
4138}
4139
4140#if 0
4141static void
4142embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4143{
4144 ev_idle_stop (EV_A_ idle);
4145}
4146#endif
2081 4147
2082void 4148void
2083ev_embed_start (EV_P_ ev_embed *w) 4149ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2084{ 4150{
2085 if (expect_false (ev_is_active (w))) 4151 if (expect_false (ev_is_active (w)))
2086 return; 4152 return;
2087 4153
2088 { 4154 {
2089 struct ev_loop *loop = w->loop; 4155 EV_P = w->other;
2090 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4156 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2091 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 4157 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2092 } 4158 }
4159
4160 EV_FREQUENT_CHECK;
2093 4161
2094 ev_set_priority (&w->io, ev_priority (w)); 4162 ev_set_priority (&w->io, ev_priority (w));
2095 ev_io_start (EV_A_ &w->io); 4163 ev_io_start (EV_A_ &w->io);
2096 4164
4165 ev_prepare_init (&w->prepare, embed_prepare_cb);
4166 ev_set_priority (&w->prepare, EV_MINPRI);
4167 ev_prepare_start (EV_A_ &w->prepare);
4168
4169 ev_fork_init (&w->fork, embed_fork_cb);
4170 ev_fork_start (EV_A_ &w->fork);
4171
4172 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4173
2097 ev_start (EV_A_ (W)w, 1); 4174 ev_start (EV_A_ (W)w, 1);
4175
4176 EV_FREQUENT_CHECK;
2098} 4177}
2099 4178
2100void 4179void
2101ev_embed_stop (EV_P_ ev_embed *w) 4180ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2102{ 4181{
2103 ev_clear_pending (EV_A_ (W)w); 4182 clear_pending (EV_A_ (W)w);
2104 if (expect_false (!ev_is_active (w))) 4183 if (expect_false (!ev_is_active (w)))
2105 return; 4184 return;
2106 4185
4186 EV_FREQUENT_CHECK;
4187
2107 ev_io_stop (EV_A_ &w->io); 4188 ev_io_stop (EV_A_ &w->io);
4189 ev_prepare_stop (EV_A_ &w->prepare);
4190 ev_fork_stop (EV_A_ &w->fork);
2108 4191
2109 ev_stop (EV_A_ (W)w); 4192 ev_stop (EV_A_ (W)w);
4193
4194 EV_FREQUENT_CHECK;
2110} 4195}
2111#endif 4196#endif
2112 4197
2113#if EV_FORK_ENABLE 4198#if EV_FORK_ENABLE
2114void 4199void
2115ev_fork_start (EV_P_ ev_fork *w) 4200ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2116{ 4201{
2117 if (expect_false (ev_is_active (w))) 4202 if (expect_false (ev_is_active (w)))
2118 return; 4203 return;
4204
4205 EV_FREQUENT_CHECK;
2119 4206
2120 ev_start (EV_A_ (W)w, ++forkcnt); 4207 ev_start (EV_A_ (W)w, ++forkcnt);
2121 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4208 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2122 forks [forkcnt - 1] = w; 4209 forks [forkcnt - 1] = w;
4210
4211 EV_FREQUENT_CHECK;
2123} 4212}
2124 4213
2125void 4214void
2126ev_fork_stop (EV_P_ ev_fork *w) 4215ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2127{ 4216{
2128 ev_clear_pending (EV_A_ (W)w); 4217 clear_pending (EV_A_ (W)w);
2129 if (expect_false (!ev_is_active (w))) 4218 if (expect_false (!ev_is_active (w)))
2130 return; 4219 return;
2131 4220
4221 EV_FREQUENT_CHECK;
4222
2132 { 4223 {
2133 int active = ((W)w)->active; 4224 int active = ev_active (w);
4225
2134 forks [active - 1] = forks [--forkcnt]; 4226 forks [active - 1] = forks [--forkcnt];
2135 ((W)forks [active - 1])->active = active; 4227 ev_active (forks [active - 1]) = active;
2136 } 4228 }
2137 4229
2138 ev_stop (EV_A_ (W)w); 4230 ev_stop (EV_A_ (W)w);
4231
4232 EV_FREQUENT_CHECK;
4233}
4234#endif
4235
4236#if EV_CLEANUP_ENABLE
4237void
4238ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4239{
4240 if (expect_false (ev_is_active (w)))
4241 return;
4242
4243 EV_FREQUENT_CHECK;
4244
4245 ev_start (EV_A_ (W)w, ++cleanupcnt);
4246 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4247 cleanups [cleanupcnt - 1] = w;
4248
4249 /* cleanup watchers should never keep a refcount on the loop */
4250 ev_unref (EV_A);
4251 EV_FREQUENT_CHECK;
4252}
4253
4254void
4255ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4256{
4257 clear_pending (EV_A_ (W)w);
4258 if (expect_false (!ev_is_active (w)))
4259 return;
4260
4261 EV_FREQUENT_CHECK;
4262 ev_ref (EV_A);
4263
4264 {
4265 int active = ev_active (w);
4266
4267 cleanups [active - 1] = cleanups [--cleanupcnt];
4268 ev_active (cleanups [active - 1]) = active;
4269 }
4270
4271 ev_stop (EV_A_ (W)w);
4272
4273 EV_FREQUENT_CHECK;
4274}
4275#endif
4276
4277#if EV_ASYNC_ENABLE
4278void
4279ev_async_start (EV_P_ ev_async *w) EV_THROW
4280{
4281 if (expect_false (ev_is_active (w)))
4282 return;
4283
4284 w->sent = 0;
4285
4286 evpipe_init (EV_A);
4287
4288 EV_FREQUENT_CHECK;
4289
4290 ev_start (EV_A_ (W)w, ++asynccnt);
4291 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4292 asyncs [asynccnt - 1] = w;
4293
4294 EV_FREQUENT_CHECK;
4295}
4296
4297void
4298ev_async_stop (EV_P_ ev_async *w) EV_THROW
4299{
4300 clear_pending (EV_A_ (W)w);
4301 if (expect_false (!ev_is_active (w)))
4302 return;
4303
4304 EV_FREQUENT_CHECK;
4305
4306 {
4307 int active = ev_active (w);
4308
4309 asyncs [active - 1] = asyncs [--asynccnt];
4310 ev_active (asyncs [active - 1]) = active;
4311 }
4312
4313 ev_stop (EV_A_ (W)w);
4314
4315 EV_FREQUENT_CHECK;
4316}
4317
4318void
4319ev_async_send (EV_P_ ev_async *w) EV_THROW
4320{
4321 w->sent = 1;
4322 evpipe_write (EV_A_ &async_pending);
2139} 4323}
2140#endif 4324#endif
2141 4325
2142/*****************************************************************************/ 4326/*****************************************************************************/
2143 4327
… …
2153once_cb (EV_P_ struct ev_once *once, int revents) 4337once_cb (EV_P_ struct ev_once *once, int revents)
2154{ 4338{
2155 void (*cb)(int revents, void *arg) = once->cb; 4339 void (*cb)(int revents, void *arg) = once->cb;
2156 void *arg = once->arg; 4340 void *arg = once->arg;
2157 4341
2158 ev_io_stop (EV_A_ &once->io); 4342 ev_io_stop (EV_A_ &once->io);
2159 ev_timer_stop (EV_A_ &once->to); 4343 ev_timer_stop (EV_A_ &once->to);
2160 ev_free (once); 4344 ev_free (once);
2161 4345
2162 cb (revents, arg); 4346 cb (revents, arg);
2163} 4347}
2164 4348
2165static void 4349static void
2166once_cb_io (EV_P_ ev_io *w, int revents) 4350once_cb_io (EV_P_ ev_io *w, int revents)
2167{ 4351{
2168 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4352 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4353
4354 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2169} 4355}
2170 4356
2171static void 4357static void
2172once_cb_to (EV_P_ ev_timer *w, int revents) 4358once_cb_to (EV_P_ ev_timer *w, int revents)
2173{ 4359{
2174 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4360 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4361
4362 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2175} 4363}
2176 4364
2177void 4365void
2178ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4366ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2179{ 4367{
2180 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4368 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2181 4369
2182 if (expect_false (!once)) 4370 if (expect_false (!once))
2183 { 4371 {
2184 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4372 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2185 return; 4373 return;
2186 } 4374 }
2187 4375
2188 once->cb = cb; 4376 once->cb = cb;
2189 once->arg = arg; 4377 once->arg = arg;
… …
2201 ev_timer_set (&once->to, timeout, 0.); 4389 ev_timer_set (&once->to, timeout, 0.);
2202 ev_timer_start (EV_A_ &once->to); 4390 ev_timer_start (EV_A_ &once->to);
2203 } 4391 }
2204} 4392}
2205 4393
2206#ifdef __cplusplus 4394/*****************************************************************************/
2207} 4395
4396#if EV_WALK_ENABLE
4397void ecb_cold
4398ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4399{
4400 int i, j;
4401 ev_watcher_list *wl, *wn;
4402
4403 if (types & (EV_IO | EV_EMBED))
4404 for (i = 0; i < anfdmax; ++i)
4405 for (wl = anfds [i].head; wl; )
4406 {
4407 wn = wl->next;
4408
4409#if EV_EMBED_ENABLE
4410 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4411 {
4412 if (types & EV_EMBED)
4413 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4414 }
4415 else
4416#endif
4417#if EV_USE_INOTIFY
4418 if (ev_cb ((ev_io *)wl) == infy_cb)
4419 ;
4420 else
4421#endif
4422 if ((ev_io *)wl != &pipe_w)
4423 if (types & EV_IO)
4424 cb (EV_A_ EV_IO, wl);
4425
4426 wl = wn;
4427 }
4428
4429 if (types & (EV_TIMER | EV_STAT))
4430 for (i = timercnt + HEAP0; i-- > HEAP0; )
4431#if EV_STAT_ENABLE
4432 /*TODO: timer is not always active*/
4433 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4434 {
4435 if (types & EV_STAT)
4436 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4437 }
4438 else
4439#endif
4440 if (types & EV_TIMER)
4441 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4442
4443#if EV_PERIODIC_ENABLE
4444 if (types & EV_PERIODIC)
4445 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4446 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4447#endif
4448
4449#if EV_IDLE_ENABLE
4450 if (types & EV_IDLE)
4451 for (j = NUMPRI; j--; )
4452 for (i = idlecnt [j]; i--; )
4453 cb (EV_A_ EV_IDLE, idles [j][i]);
4454#endif
4455
4456#if EV_FORK_ENABLE
4457 if (types & EV_FORK)
4458 for (i = forkcnt; i--; )
4459 if (ev_cb (forks [i]) != embed_fork_cb)
4460 cb (EV_A_ EV_FORK, forks [i]);
4461#endif
4462
4463#if EV_ASYNC_ENABLE
4464 if (types & EV_ASYNC)
4465 for (i = asynccnt; i--; )
4466 cb (EV_A_ EV_ASYNC, asyncs [i]);
4467#endif
4468
4469#if EV_PREPARE_ENABLE
4470 if (types & EV_PREPARE)
4471 for (i = preparecnt; i--; )
4472# if EV_EMBED_ENABLE
4473 if (ev_cb (prepares [i]) != embed_prepare_cb)
2208#endif 4474# endif
4475 cb (EV_A_ EV_PREPARE, prepares [i]);
4476#endif
2209 4477
4478#if EV_CHECK_ENABLE
4479 if (types & EV_CHECK)
4480 for (i = checkcnt; i--; )
4481 cb (EV_A_ EV_CHECK, checks [i]);
4482#endif
4483
4484#if EV_SIGNAL_ENABLE
4485 if (types & EV_SIGNAL)
4486 for (i = 0; i < EV_NSIG - 1; ++i)
4487 for (wl = signals [i].head; wl; )
4488 {
4489 wn = wl->next;
4490 cb (EV_A_ EV_SIGNAL, wl);
4491 wl = wn;
4492 }
4493#endif
4494
4495#if EV_CHILD_ENABLE
4496 if (types & EV_CHILD)
4497 for (i = (EV_PID_HASHSIZE); i--; )
4498 for (wl = childs [i]; wl; )
4499 {
4500 wn = wl->next;
4501 cb (EV_A_ EV_CHILD, wl);
4502 wl = wn;
4503 }
4504#endif
4505/* EV_STAT 0x00001000 /* stat data changed */
4506/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4507}
4508#endif
4509
4510#if EV_MULTIPLICITY
4511 #include "ev_wrap.h"
4512#endif
4513

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