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Comparing libev/ev.c (file contents):
Revision 1.169 by root, Sat Dec 8 14:27:39 2007 UTC vs.
Revision 1.384 by root, Wed Jul 20 00:58:45 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
30 */ 38 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 43# include EV_CONFIG_H
39# else 44# else
40# include "config.h" 45# include "config.h"
41# endif 46# endif
42 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
43# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
46# endif 71# endif
47# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
49# endif 74# endif
50# else 75# else
51# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
53# endif 78# endif
54# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
56# endif 81# endif
57# endif 82# endif
58 83
84# if HAVE_NANOSLEEP
59# ifndef EV_USE_SELECT 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif 87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
65# endif 91# endif
66 92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
67# ifndef EV_USE_POLL 94# ifndef EV_USE_SELECT
68# if HAVE_POLL && HAVE_POLL_H 95# define EV_USE_SELECT EV_FEATURE_BACKENDS
69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
73# endif 109# endif
74 110
75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
78# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
79# define EV_USE_EPOLL 0
80# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
81# endif 118# endif
82 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
83# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
89# endif 127# endif
90 128
91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
93# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
94# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
95# define EV_USE_PORT 0
96# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
97# endif 136# endif
98 137
99# ifndef EV_USE_INOTIFY
100# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
101# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
102# else
103# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
104# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
105# endif 145# endif
106 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
107#endif 154# endif
108 155
109#include <math.h> 156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
110#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
111#include <fcntl.h> 169#include <fcntl.h>
112#include <stddef.h> 170#include <stddef.h>
113 171
114#include <stdio.h> 172#include <stdio.h>
115 173
116#include <assert.h> 174#include <assert.h>
117#include <errno.h> 175#include <errno.h>
118#include <sys/types.h> 176#include <sys/types.h>
119#include <time.h> 177#include <time.h>
178#include <limits.h>
120 179
121#include <signal.h> 180#include <signal.h>
122 181
123#ifdef EV_H 182#ifdef EV_H
124# include EV_H 183# include EV_H
125#else 184#else
126# include "ev.h" 185# include "ev.h"
127#endif 186#endif
187
188EV_CPP(extern "C" {)
128 189
129#ifndef _WIN32 190#ifndef _WIN32
130# include <sys/time.h> 191# include <sys/time.h>
131# include <sys/wait.h> 192# include <sys/wait.h>
132# include <unistd.h> 193# include <unistd.h>
133#else 194#else
195# include <io.h>
134# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 197# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
138# endif 200# endif
201# undef EV_AVOID_STDIO
202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */
213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
139#endif 251# endif
140 252#endif
141/**/
142 253
143#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
144# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
259# endif
145#endif 260#endif
146 261
147#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
264#endif
265
266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
270# define EV_USE_NANOSLEEP 0
271# endif
149#endif 272#endif
150 273
151#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
153#endif 276#endif
154 277
155#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
156# ifdef _WIN32 279# ifdef _WIN32
157# define EV_USE_POLL 0 280# define EV_USE_POLL 0
158# else 281# else
159# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
160# endif 283# endif
161#endif 284#endif
162 285
163#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
289# else
164# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
291# endif
165#endif 292#endif
166 293
167#ifndef EV_USE_KQUEUE 294#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 295# define EV_USE_KQUEUE 0
169#endif 296#endif
… …
171#ifndef EV_USE_PORT 298#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 299# define EV_USE_PORT 0
173#endif 300#endif
174 301
175#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_INOTIFY EV_FEATURE_OS
305# else
176# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
307# endif
177#endif 308#endif
178 309
179#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181# define EV_PID_HASHSIZE 1 312#endif
313
314#ifndef EV_INOTIFY_HASHSIZE
315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
316#endif
317
318#ifndef EV_USE_EVENTFD
319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
320# define EV_USE_EVENTFD EV_FEATURE_OS
182# else 321# else
183# define EV_PID_HASHSIZE 16 322# define EV_USE_EVENTFD 0
184# endif 323# endif
185#endif 324#endif
186 325
187#ifndef EV_INOTIFY_HASHSIZE 326#ifndef EV_USE_SIGNALFD
188# if EV_MINIMAL 327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189# define EV_INOTIFY_HASHSIZE 1 328# define EV_USE_SIGNALFD EV_FEATURE_OS
190# else 329# else
191# define EV_INOTIFY_HASHSIZE 16 330# define EV_USE_SIGNALFD 0
192# endif 331# endif
193#endif 332#endif
194 333
195/**/ 334#if 0 /* debugging */
335# define EV_VERIFY 3
336# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1
338#endif
339
340#ifndef EV_VERIFY
341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342#endif
343
344#ifndef EV_USE_4HEAP
345# define EV_USE_4HEAP EV_FEATURE_DATA
346#endif
347
348#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
364#endif
365
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
196 373
197#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
200#endif 377#endif
… …
202#ifndef CLOCK_REALTIME 379#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 380# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 381# define EV_USE_REALTIME 0
205#endif 382#endif
206 383
384#if !EV_STAT_ENABLE
385# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0
387#endif
388
389#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
392# include <sys/select.h>
393# endif
394#endif
395
396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
398# include <sys/inotify.h>
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0
403# endif
404#endif
405
207#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 407# include <winsock.h>
209#endif 408#endif
210 409
211#if !EV_STAT_ENABLE 410#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
412# include <stdint.h>
413# ifndef EFD_NONBLOCK
414# define EFD_NONBLOCK O_NONBLOCK
213#endif 415# endif
416# ifndef EFD_CLOEXEC
417# ifdef O_CLOEXEC
418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
214 425
215#if EV_USE_INOTIFY 426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
216# include <sys/inotify.h> 428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445};
217#endif 446#endif
218 447
219/**/ 448/**/
449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
456/*
457 * This is used to work around floating point rounding problems.
458 * This value is good at least till the year 4000.
459 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
220 462
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#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) */ 464#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 */
224 465
225#if __GNUC__ >= 3 466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
226# define expect(expr,value) __builtin_expect ((expr),(value)) 467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
227# define noinline __attribute__ ((noinline)) 468
469/* the following are taken from libecb */
470/* ecb.h start */
471
472/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers.
475 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place.
478 */
479#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
481 #define ECB_GCC_VERSION(major,minor) 0
482 #else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
484 #endif
485#endif
486
487#if __cplusplus
488 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__
491#elif ECB_C99
492 #define ecb_inline static inline
228#else 493#else
229# define expect(expr,value) (expr) 494 #define ecb_inline static
230# define noinline
231# if __STDC_VERSION__ < 199901L
232# define inline
233# endif 495#endif
496
497#ifndef ECB_MEMORY_FENCE
498 #if ECB_GCC_VERSION(2,5)
499 #if __x86
500 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
501 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
502 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */
503 #elif __amd64
504 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
505 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
506 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
507 #endif
234#endif 508 #endif
509#endif
235 510
511#ifndef ECB_MEMORY_FENCE
512 #if ECB_GCC_VERSION(4,4)
513 #define ECB_MEMORY_FENCE __sync_synchronize ()
514 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
515 #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
516 #elif _MSC_VER >= 1400
517 #define ECB_MEMORY_FENCE do { } while (0)
518 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
519 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
520 #elif defined(_WIN32) && defined(MemoryBarrier)
521 #define ECB_MEMORY_FENCE MemoryBarrier ()
522 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
523 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
524 #endif
525#endif
526
527#ifndef ECB_MEMORY_FENCE
528 #include <pthread.h>
529
530 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
531 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
532 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
533 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
534#endif
535
536#if ECB_GCC_VERSION(3,1)
537 #define ecb_attribute(attrlist) __attribute__(attrlist)
538 #define ecb_is_constant(expr) __builtin_constant_p (expr)
539 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
540 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
541#else
542 #define ecb_attribute(attrlist)
543 #define ecb_is_constant(expr) 0
544 #define ecb_expect(expr,value) (expr)
545 #define ecb_prefetch(addr,rw,locality)
546#endif
547
548#define ecb_noinline ecb_attribute ((__noinline__))
549#define ecb_noreturn ecb_attribute ((__noreturn__))
550#define ecb_unused ecb_attribute ((__unused__))
551#define ecb_const ecb_attribute ((__const__))
552#define ecb_pure ecb_attribute ((__pure__))
553
554#if ECB_GCC_VERSION(4,3)
555 #define ecb_artificial ecb_attribute ((__artificial__))
556 #define ecb_hot ecb_attribute ((__hot__))
557 #define ecb_cold ecb_attribute ((__cold__))
558#else
559 #define ecb_artificial
560 #define ecb_hot
561 #define ecb_cold
562#endif
563
564/* put around conditional expressions if you are very sure that the */
565/* expression is mostly true or mostly false. note that these return */
566/* booleans, not the expression. */
236#define expect_false(expr) expect ((expr) != 0, 0) 567#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
237#define expect_true(expr) expect ((expr) != 0, 1) 568#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
569/* ecb.h end */
570
571#define expect_false(cond) ecb_expect_false (cond)
572#define expect_true(cond) ecb_expect_true (cond)
573#define noinline ecb_noinline
574
238#define inline_size static inline 575#define inline_size ecb_inline
239 576
240#if EV_MINIMAL 577#if EV_FEATURE_CODE
578# define inline_speed ecb_inline
579#else
241# define inline_speed static noinline 580# define inline_speed static noinline
581#endif
582
583#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
584
585#if EV_MINPRI == EV_MAXPRI
586# define ABSPRI(w) (((W)w), 0)
242#else 587#else
243# define inline_speed static inline
244#endif
245
246#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
247#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 588# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
589#endif
248 590
249#define EMPTY /* required for microsofts broken pseudo-c compiler */ 591#define EMPTY /* required for microsofts broken pseudo-c compiler */
250#define EMPTY2(a,b) /* used to suppress some warnings */ 592#define EMPTY2(a,b) /* used to suppress some warnings */
251 593
252typedef ev_watcher *W; 594typedef ev_watcher *W;
253typedef ev_watcher_list *WL; 595typedef ev_watcher_list *WL;
254typedef ev_watcher_time *WT; 596typedef ev_watcher_time *WT;
255 597
598#define ev_active(w) ((W)(w))->active
599#define ev_at(w) ((WT)(w))->at
600
601#if EV_USE_REALTIME
602/* sig_atomic_t is used to avoid per-thread variables or locking but still */
603/* giving it a reasonably high chance of working on typical architectures */
604static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
605#endif
606
607#if EV_USE_MONOTONIC
256static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 608static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
609#endif
610
611#ifndef EV_FD_TO_WIN32_HANDLE
612# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
613#endif
614#ifndef EV_WIN32_HANDLE_TO_FD
615# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
616#endif
617#ifndef EV_WIN32_CLOSE_FD
618# define EV_WIN32_CLOSE_FD(fd) close (fd)
619#endif
257 620
258#ifdef _WIN32 621#ifdef _WIN32
259# include "ev_win32.c" 622# include "ev_win32.c"
260#endif 623#endif
261 624
262/*****************************************************************************/ 625/*****************************************************************************/
263 626
627/* define a suitable floor function (only used by periodics atm) */
628
629#if EV_USE_FLOOR
630# include <math.h>
631# define ev_floor(v) floor (v)
632#else
633
634#include <float.h>
635
636/* a floor() replacement function, should be independent of ev_tstamp type */
637static ev_tstamp noinline
638ev_floor (ev_tstamp v)
639{
640 /* the choice of shift factor is not terribly important */
641#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
642 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
643#else
644 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
645#endif
646
647 /* argument too large for an unsigned long? */
648 if (expect_false (v >= shift))
649 {
650 ev_tstamp f;
651
652 if (v == v - 1.)
653 return v; /* very large number */
654
655 f = shift * ev_floor (v * (1. / shift));
656 return f + ev_floor (v - f);
657 }
658
659 /* special treatment for negative args? */
660 if (expect_false (v < 0.))
661 {
662 ev_tstamp f = -ev_floor (-v);
663
664 return f - (f == v ? 0 : 1);
665 }
666
667 /* fits into an unsigned long */
668 return (unsigned long)v;
669}
670
671#endif
672
673/*****************************************************************************/
674
675#ifdef __linux
676# include <sys/utsname.h>
677#endif
678
679static unsigned int noinline ecb_cold
680ev_linux_version (void)
681{
682#ifdef __linux
683 unsigned int v = 0;
684 struct utsname buf;
685 int i;
686 char *p = buf.release;
687
688 if (uname (&buf))
689 return 0;
690
691 for (i = 3+1; --i; )
692 {
693 unsigned int c = 0;
694
695 for (;;)
696 {
697 if (*p >= '0' && *p <= '9')
698 c = c * 10 + *p++ - '0';
699 else
700 {
701 p += *p == '.';
702 break;
703 }
704 }
705
706 v = (v << 8) | c;
707 }
708
709 return v;
710#else
711 return 0;
712#endif
713}
714
715/*****************************************************************************/
716
717#if EV_AVOID_STDIO
718static void noinline ecb_cold
719ev_printerr (const char *msg)
720{
721 write (STDERR_FILENO, msg, strlen (msg));
722}
723#endif
724
264static void (*syserr_cb)(const char *msg); 725static void (*syserr_cb)(const char *msg);
265 726
266void 727void ecb_cold
267ev_set_syserr_cb (void (*cb)(const char *msg)) 728ev_set_syserr_cb (void (*cb)(const char *msg))
268{ 729{
269 syserr_cb = cb; 730 syserr_cb = cb;
270} 731}
271 732
272static void noinline 733static void noinline ecb_cold
273syserr (const char *msg) 734ev_syserr (const char *msg)
274{ 735{
275 if (!msg) 736 if (!msg)
276 msg = "(libev) system error"; 737 msg = "(libev) system error";
277 738
278 if (syserr_cb) 739 if (syserr_cb)
279 syserr_cb (msg); 740 syserr_cb (msg);
280 else 741 else
281 { 742 {
743#if EV_AVOID_STDIO
744 ev_printerr (msg);
745 ev_printerr (": ");
746 ev_printerr (strerror (errno));
747 ev_printerr ("\n");
748#else
282 perror (msg); 749 perror (msg);
750#endif
283 abort (); 751 abort ();
284 } 752 }
285} 753}
286 754
755static void *
756ev_realloc_emul (void *ptr, long size)
757{
758#if __GLIBC__
759 return realloc (ptr, size);
760#else
761 /* some systems, notably openbsd and darwin, fail to properly
762 * implement realloc (x, 0) (as required by both ansi c-89 and
763 * the single unix specification, so work around them here.
764 */
765
766 if (size)
767 return realloc (ptr, size);
768
769 free (ptr);
770 return 0;
771#endif
772}
773
287static void *(*alloc)(void *ptr, long size); 774static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
288 775
289void 776void ecb_cold
290ev_set_allocator (void *(*cb)(void *ptr, long size)) 777ev_set_allocator (void *(*cb)(void *ptr, long size))
291{ 778{
292 alloc = cb; 779 alloc = cb;
293} 780}
294 781
295inline_speed void * 782inline_speed void *
296ev_realloc (void *ptr, long size) 783ev_realloc (void *ptr, long size)
297{ 784{
298 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 785 ptr = alloc (ptr, size);
299 786
300 if (!ptr && size) 787 if (!ptr && size)
301 { 788 {
789#if EV_AVOID_STDIO
790 ev_printerr ("(libev) memory allocation failed, aborting.\n");
791#else
302 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 792 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
793#endif
303 abort (); 794 abort ();
304 } 795 }
305 796
306 return ptr; 797 return ptr;
307} 798}
… …
309#define ev_malloc(size) ev_realloc (0, (size)) 800#define ev_malloc(size) ev_realloc (0, (size))
310#define ev_free(ptr) ev_realloc ((ptr), 0) 801#define ev_free(ptr) ev_realloc ((ptr), 0)
311 802
312/*****************************************************************************/ 803/*****************************************************************************/
313 804
805/* set in reify when reification needed */
806#define EV_ANFD_REIFY 1
807
808/* file descriptor info structure */
314typedef struct 809typedef struct
315{ 810{
316 WL head; 811 WL head;
317 unsigned char events; 812 unsigned char events; /* the events watched for */
813 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
814 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
318 unsigned char reify; 815 unsigned char unused;
816#if EV_USE_EPOLL
817 unsigned int egen; /* generation counter to counter epoll bugs */
818#endif
319#if EV_SELECT_IS_WINSOCKET 819#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
320 SOCKET handle; 820 SOCKET handle;
321#endif 821#endif
822#if EV_USE_IOCP
823 OVERLAPPED or, ow;
824#endif
322} ANFD; 825} ANFD;
323 826
827/* stores the pending event set for a given watcher */
324typedef struct 828typedef struct
325{ 829{
326 W w; 830 W w;
327 int events; 831 int events; /* the pending event set for the given watcher */
328} ANPENDING; 832} ANPENDING;
329 833
330#if EV_USE_INOTIFY 834#if EV_USE_INOTIFY
835/* hash table entry per inotify-id */
331typedef struct 836typedef struct
332{ 837{
333 WL head; 838 WL head;
334} ANFS; 839} ANFS;
840#endif
841
842/* Heap Entry */
843#if EV_HEAP_CACHE_AT
844 /* a heap element */
845 typedef struct {
846 ev_tstamp at;
847 WT w;
848 } ANHE;
849
850 #define ANHE_w(he) (he).w /* access watcher, read-write */
851 #define ANHE_at(he) (he).at /* access cached at, read-only */
852 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
853#else
854 /* a heap element */
855 typedef WT ANHE;
856
857 #define ANHE_w(he) (he)
858 #define ANHE_at(he) (he)->at
859 #define ANHE_at_cache(he)
335#endif 860#endif
336 861
337#if EV_MULTIPLICITY 862#if EV_MULTIPLICITY
338 863
339 struct ev_loop 864 struct ev_loop
… …
358 883
359 static int ev_default_loop_ptr; 884 static int ev_default_loop_ptr;
360 885
361#endif 886#endif
362 887
888#if EV_FEATURE_API
889# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
890# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
891# define EV_INVOKE_PENDING invoke_cb (EV_A)
892#else
893# define EV_RELEASE_CB (void)0
894# define EV_ACQUIRE_CB (void)0
895# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
896#endif
897
898#define EVBREAK_RECURSE 0x80
899
363/*****************************************************************************/ 900/*****************************************************************************/
364 901
902#ifndef EV_HAVE_EV_TIME
365ev_tstamp 903ev_tstamp
366ev_time (void) 904ev_time (void)
367{ 905{
368#if EV_USE_REALTIME 906#if EV_USE_REALTIME
907 if (expect_true (have_realtime))
908 {
369 struct timespec ts; 909 struct timespec ts;
370 clock_gettime (CLOCK_REALTIME, &ts); 910 clock_gettime (CLOCK_REALTIME, &ts);
371 return ts.tv_sec + ts.tv_nsec * 1e-9; 911 return ts.tv_sec + ts.tv_nsec * 1e-9;
372#else 912 }
913#endif
914
373 struct timeval tv; 915 struct timeval tv;
374 gettimeofday (&tv, 0); 916 gettimeofday (&tv, 0);
375 return tv.tv_sec + tv.tv_usec * 1e-6; 917 return tv.tv_sec + tv.tv_usec * 1e-6;
376#endif
377} 918}
919#endif
378 920
379ev_tstamp inline_size 921inline_size ev_tstamp
380get_clock (void) 922get_clock (void)
381{ 923{
382#if EV_USE_MONOTONIC 924#if EV_USE_MONOTONIC
383 if (expect_true (have_monotonic)) 925 if (expect_true (have_monotonic))
384 { 926 {
… …
397{ 939{
398 return ev_rt_now; 940 return ev_rt_now;
399} 941}
400#endif 942#endif
401 943
402int inline_size 944void
945ev_sleep (ev_tstamp delay)
946{
947 if (delay > 0.)
948 {
949#if EV_USE_NANOSLEEP
950 struct timespec ts;
951
952 EV_TS_SET (ts, delay);
953 nanosleep (&ts, 0);
954#elif defined(_WIN32)
955 Sleep ((unsigned long)(delay * 1e3));
956#else
957 struct timeval tv;
958
959 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
960 /* something not guaranteed by newer posix versions, but guaranteed */
961 /* by older ones */
962 EV_TV_SET (tv, delay);
963 select (0, 0, 0, 0, &tv);
964#endif
965 }
966}
967
968/*****************************************************************************/
969
970#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
971
972/* find a suitable new size for the given array, */
973/* hopefully by rounding to a nice-to-malloc size */
974inline_size int
403array_nextsize (int elem, int cur, int cnt) 975array_nextsize (int elem, int cur, int cnt)
404{ 976{
405 int ncur = cur + 1; 977 int ncur = cur + 1;
406 978
407 do 979 do
408 ncur <<= 1; 980 ncur <<= 1;
409 while (cnt > ncur); 981 while (cnt > ncur);
410 982
411 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 983 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
412 if (elem * ncur > 4096) 984 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
413 { 985 {
414 ncur *= elem; 986 ncur *= elem;
415 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 987 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
416 ncur = ncur - sizeof (void *) * 4; 988 ncur = ncur - sizeof (void *) * 4;
417 ncur /= elem; 989 ncur /= elem;
418 } 990 }
419 991
420 return ncur; 992 return ncur;
421} 993}
422 994
423inline_speed void * 995static void * noinline ecb_cold
424array_realloc (int elem, void *base, int *cur, int cnt) 996array_realloc (int elem, void *base, int *cur, int cnt)
425{ 997{
426 *cur = array_nextsize (elem, *cur, cnt); 998 *cur = array_nextsize (elem, *cur, cnt);
427 return ev_realloc (base, elem * *cur); 999 return ev_realloc (base, elem * *cur);
428} 1000}
1001
1002#define array_init_zero(base,count) \
1003 memset ((void *)(base), 0, sizeof (*(base)) * (count))
429 1004
430#define array_needsize(type,base,cur,cnt,init) \ 1005#define array_needsize(type,base,cur,cnt,init) \
431 if (expect_false ((cnt) > (cur))) \ 1006 if (expect_false ((cnt) > (cur))) \
432 { \ 1007 { \
433 int ocur_ = (cur); \ 1008 int ecb_unused ocur_ = (cur); \
434 (base) = (type *)array_realloc \ 1009 (base) = (type *)array_realloc \
435 (sizeof (type), (base), &(cur), (cnt)); \ 1010 (sizeof (type), (base), &(cur), (cnt)); \
436 init ((base) + (ocur_), (cur) - ocur_); \ 1011 init ((base) + (ocur_), (cur) - ocur_); \
437 } 1012 }
438 1013
… …
445 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1020 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
446 } 1021 }
447#endif 1022#endif
448 1023
449#define array_free(stem, idx) \ 1024#define array_free(stem, idx) \
450 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1025 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
451 1026
452/*****************************************************************************/ 1027/*****************************************************************************/
1028
1029/* dummy callback for pending events */
1030static void noinline
1031pendingcb (EV_P_ ev_prepare *w, int revents)
1032{
1033}
453 1034
454void noinline 1035void noinline
455ev_feed_event (EV_P_ void *w, int revents) 1036ev_feed_event (EV_P_ void *w, int revents)
456{ 1037{
457 W w_ = (W)w; 1038 W w_ = (W)w;
1039 int pri = ABSPRI (w_);
458 1040
459 if (expect_false (w_->pending)) 1041 if (expect_false (w_->pending))
1042 pendings [pri][w_->pending - 1].events |= revents;
1043 else
460 { 1044 {
1045 w_->pending = ++pendingcnt [pri];
1046 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1047 pendings [pri][w_->pending - 1].w = w_;
461 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1048 pendings [pri][w_->pending - 1].events = revents;
462 return;
463 } 1049 }
464
465 w_->pending = ++pendingcnt [ABSPRI (w_)];
466 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
467 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
468 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
469} 1050}
470 1051
471void inline_size 1052inline_speed void
1053feed_reverse (EV_P_ W w)
1054{
1055 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1056 rfeeds [rfeedcnt++] = w;
1057}
1058
1059inline_size void
1060feed_reverse_done (EV_P_ int revents)
1061{
1062 do
1063 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1064 while (rfeedcnt);
1065}
1066
1067inline_speed void
472queue_events (EV_P_ W *events, int eventcnt, int type) 1068queue_events (EV_P_ W *events, int eventcnt, int type)
473{ 1069{
474 int i; 1070 int i;
475 1071
476 for (i = 0; i < eventcnt; ++i) 1072 for (i = 0; i < eventcnt; ++i)
477 ev_feed_event (EV_A_ events [i], type); 1073 ev_feed_event (EV_A_ events [i], type);
478} 1074}
479 1075
480/*****************************************************************************/ 1076/*****************************************************************************/
481 1077
482void inline_size 1078inline_speed void
483anfds_init (ANFD *base, int count)
484{
485 while (count--)
486 {
487 base->head = 0;
488 base->events = EV_NONE;
489 base->reify = 0;
490
491 ++base;
492 }
493}
494
495void inline_speed
496fd_event (EV_P_ int fd, int revents) 1079fd_event_nocheck (EV_P_ int fd, int revents)
497{ 1080{
498 ANFD *anfd = anfds + fd; 1081 ANFD *anfd = anfds + fd;
499 ev_io *w; 1082 ev_io *w;
500 1083
501 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1084 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
505 if (ev) 1088 if (ev)
506 ev_feed_event (EV_A_ (W)w, ev); 1089 ev_feed_event (EV_A_ (W)w, ev);
507 } 1090 }
508} 1091}
509 1092
1093/* do not submit kernel events for fds that have reify set */
1094/* because that means they changed while we were polling for new events */
1095inline_speed void
1096fd_event (EV_P_ int fd, int revents)
1097{
1098 ANFD *anfd = anfds + fd;
1099
1100 if (expect_true (!anfd->reify))
1101 fd_event_nocheck (EV_A_ fd, revents);
1102}
1103
510void 1104void
511ev_feed_fd_event (EV_P_ int fd, int revents) 1105ev_feed_fd_event (EV_P_ int fd, int revents)
512{ 1106{
513 if (fd >= 0 && fd < anfdmax) 1107 if (fd >= 0 && fd < anfdmax)
514 fd_event (EV_A_ fd, revents); 1108 fd_event_nocheck (EV_A_ fd, revents);
515} 1109}
516 1110
517void inline_size 1111/* make sure the external fd watch events are in-sync */
1112/* with the kernel/libev internal state */
1113inline_size void
518fd_reify (EV_P) 1114fd_reify (EV_P)
519{ 1115{
520 int i; 1116 int i;
1117
1118#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1119 for (i = 0; i < fdchangecnt; ++i)
1120 {
1121 int fd = fdchanges [i];
1122 ANFD *anfd = anfds + fd;
1123
1124 if (anfd->reify & EV__IOFDSET && anfd->head)
1125 {
1126 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1127
1128 if (handle != anfd->handle)
1129 {
1130 unsigned long arg;
1131
1132 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1133
1134 /* handle changed, but fd didn't - we need to do it in two steps */
1135 backend_modify (EV_A_ fd, anfd->events, 0);
1136 anfd->events = 0;
1137 anfd->handle = handle;
1138 }
1139 }
1140 }
1141#endif
521 1142
522 for (i = 0; i < fdchangecnt; ++i) 1143 for (i = 0; i < fdchangecnt; ++i)
523 { 1144 {
524 int fd = fdchanges [i]; 1145 int fd = fdchanges [i];
525 ANFD *anfd = anfds + fd; 1146 ANFD *anfd = anfds + fd;
526 ev_io *w; 1147 ev_io *w;
527 1148
528 int events = 0; 1149 unsigned char o_events = anfd->events;
1150 unsigned char o_reify = anfd->reify;
529 1151
530 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1152 anfd->reify = 0;
531 events |= w->events;
532 1153
533#if EV_SELECT_IS_WINSOCKET 1154 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
534 if (events)
535 { 1155 {
536 unsigned long argp; 1156 anfd->events = 0;
537 anfd->handle = _get_osfhandle (fd); 1157
538 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1158 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1159 anfd->events |= (unsigned char)w->events;
1160
1161 if (o_events != anfd->events)
1162 o_reify = EV__IOFDSET; /* actually |= */
539 } 1163 }
540#endif
541 1164
542 anfd->reify = 0; 1165 if (o_reify & EV__IOFDSET)
543
544 backend_modify (EV_A_ fd, anfd->events, events); 1166 backend_modify (EV_A_ fd, o_events, anfd->events);
545 anfd->events = events;
546 } 1167 }
547 1168
548 fdchangecnt = 0; 1169 fdchangecnt = 0;
549} 1170}
550 1171
551void inline_size 1172/* something about the given fd changed */
1173inline_size void
552fd_change (EV_P_ int fd) 1174fd_change (EV_P_ int fd, int flags)
553{ 1175{
554 if (expect_false (anfds [fd].reify)) 1176 unsigned char reify = anfds [fd].reify;
555 return;
556
557 anfds [fd].reify = 1; 1177 anfds [fd].reify |= flags;
558 1178
1179 if (expect_true (!reify))
1180 {
559 ++fdchangecnt; 1181 ++fdchangecnt;
560 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1182 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
561 fdchanges [fdchangecnt - 1] = fd; 1183 fdchanges [fdchangecnt - 1] = fd;
1184 }
562} 1185}
563 1186
564void inline_speed 1187/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1188inline_speed void ecb_cold
565fd_kill (EV_P_ int fd) 1189fd_kill (EV_P_ int fd)
566{ 1190{
567 ev_io *w; 1191 ev_io *w;
568 1192
569 while ((w = (ev_io *)anfds [fd].head)) 1193 while ((w = (ev_io *)anfds [fd].head))
… …
571 ev_io_stop (EV_A_ w); 1195 ev_io_stop (EV_A_ w);
572 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1196 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
573 } 1197 }
574} 1198}
575 1199
576int inline_size 1200/* check whether the given fd is actually valid, for error recovery */
1201inline_size int ecb_cold
577fd_valid (int fd) 1202fd_valid (int fd)
578{ 1203{
579#ifdef _WIN32 1204#ifdef _WIN32
580 return _get_osfhandle (fd) != -1; 1205 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
581#else 1206#else
582 return fcntl (fd, F_GETFD) != -1; 1207 return fcntl (fd, F_GETFD) != -1;
583#endif 1208#endif
584} 1209}
585 1210
586/* called on EBADF to verify fds */ 1211/* called on EBADF to verify fds */
587static void noinline 1212static void noinline ecb_cold
588fd_ebadf (EV_P) 1213fd_ebadf (EV_P)
589{ 1214{
590 int fd; 1215 int fd;
591 1216
592 for (fd = 0; fd < anfdmax; ++fd) 1217 for (fd = 0; fd < anfdmax; ++fd)
593 if (anfds [fd].events) 1218 if (anfds [fd].events)
594 if (!fd_valid (fd) == -1 && errno == EBADF) 1219 if (!fd_valid (fd) && errno == EBADF)
595 fd_kill (EV_A_ fd); 1220 fd_kill (EV_A_ fd);
596} 1221}
597 1222
598/* called on ENOMEM in select/poll to kill some fds and retry */ 1223/* called on ENOMEM in select/poll to kill some fds and retry */
599static void noinline 1224static void noinline ecb_cold
600fd_enomem (EV_P) 1225fd_enomem (EV_P)
601{ 1226{
602 int fd; 1227 int fd;
603 1228
604 for (fd = anfdmax; fd--; ) 1229 for (fd = anfdmax; fd--; )
605 if (anfds [fd].events) 1230 if (anfds [fd].events)
606 { 1231 {
607 fd_kill (EV_A_ fd); 1232 fd_kill (EV_A_ fd);
608 return; 1233 break;
609 } 1234 }
610} 1235}
611 1236
612/* usually called after fork if backend needs to re-arm all fds from scratch */ 1237/* usually called after fork if backend needs to re-arm all fds from scratch */
613static void noinline 1238static void noinline
… …
617 1242
618 for (fd = 0; fd < anfdmax; ++fd) 1243 for (fd = 0; fd < anfdmax; ++fd)
619 if (anfds [fd].events) 1244 if (anfds [fd].events)
620 { 1245 {
621 anfds [fd].events = 0; 1246 anfds [fd].events = 0;
622 fd_change (EV_A_ fd); 1247 anfds [fd].emask = 0;
1248 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
623 } 1249 }
624} 1250}
625 1251
626/*****************************************************************************/ 1252/* used to prepare libev internal fd's */
627 1253/* this is not fork-safe */
628void inline_speed 1254inline_speed void
629upheap (WT *heap, int k)
630{
631 WT w = heap [k];
632
633 while (k && heap [k >> 1]->at > w->at)
634 {
635 heap [k] = heap [k >> 1];
636 ((W)heap [k])->active = k + 1;
637 k >>= 1;
638 }
639
640 heap [k] = w;
641 ((W)heap [k])->active = k + 1;
642
643}
644
645void inline_speed
646downheap (WT *heap, int N, int k)
647{
648 WT w = heap [k];
649
650 while (k < (N >> 1))
651 {
652 int j = k << 1;
653
654 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
655 ++j;
656
657 if (w->at <= heap [j]->at)
658 break;
659
660 heap [k] = heap [j];
661 ((W)heap [k])->active = k + 1;
662 k = j;
663 }
664
665 heap [k] = w;
666 ((W)heap [k])->active = k + 1;
667}
668
669void inline_size
670adjustheap (WT *heap, int N, int k)
671{
672 upheap (heap, k);
673 downheap (heap, N, k);
674}
675
676/*****************************************************************************/
677
678typedef struct
679{
680 WL head;
681 sig_atomic_t volatile gotsig;
682} ANSIG;
683
684static ANSIG *signals;
685static int signalmax;
686
687static int sigpipe [2];
688static sig_atomic_t volatile gotsig;
689static ev_io sigev;
690
691void inline_size
692signals_init (ANSIG *base, int count)
693{
694 while (count--)
695 {
696 base->head = 0;
697 base->gotsig = 0;
698
699 ++base;
700 }
701}
702
703static void
704sighandler (int signum)
705{
706#if _WIN32
707 signal (signum, sighandler);
708#endif
709
710 signals [signum - 1].gotsig = 1;
711
712 if (!gotsig)
713 {
714 int old_errno = errno;
715 gotsig = 1;
716 write (sigpipe [1], &signum, 1);
717 errno = old_errno;
718 }
719}
720
721void noinline
722ev_feed_signal_event (EV_P_ int signum)
723{
724 WL w;
725
726#if EV_MULTIPLICITY
727 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
728#endif
729
730 --signum;
731
732 if (signum < 0 || signum >= signalmax)
733 return;
734
735 signals [signum].gotsig = 0;
736
737 for (w = signals [signum].head; w; w = w->next)
738 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
739}
740
741static void
742sigcb (EV_P_ ev_io *iow, int revents)
743{
744 int signum;
745
746 read (sigpipe [0], &revents, 1);
747 gotsig = 0;
748
749 for (signum = signalmax; signum--; )
750 if (signals [signum].gotsig)
751 ev_feed_signal_event (EV_A_ signum + 1);
752}
753
754void inline_size
755fd_intern (int fd) 1255fd_intern (int fd)
756{ 1256{
757#ifdef _WIN32 1257#ifdef _WIN32
758 int arg = 1; 1258 unsigned long arg = 1;
759 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1259 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
760#else 1260#else
761 fcntl (fd, F_SETFD, FD_CLOEXEC); 1261 fcntl (fd, F_SETFD, FD_CLOEXEC);
762 fcntl (fd, F_SETFL, O_NONBLOCK); 1262 fcntl (fd, F_SETFL, O_NONBLOCK);
763#endif 1263#endif
764} 1264}
765 1265
766static void noinline
767siginit (EV_P)
768{
769 fd_intern (sigpipe [0]);
770 fd_intern (sigpipe [1]);
771
772 ev_io_set (&sigev, sigpipe [0], EV_READ);
773 ev_io_start (EV_A_ &sigev);
774 ev_unref (EV_A); /* child watcher should not keep loop alive */
775}
776
777/*****************************************************************************/ 1266/*****************************************************************************/
778 1267
779static ev_child *childs [EV_PID_HASHSIZE]; 1268/*
1269 * the heap functions want a real array index. array index 0 is guaranteed to not
1270 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1271 * the branching factor of the d-tree.
1272 */
780 1273
1274/*
1275 * at the moment we allow libev the luxury of two heaps,
1276 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1277 * which is more cache-efficient.
1278 * the difference is about 5% with 50000+ watchers.
1279 */
1280#if EV_USE_4HEAP
1281
1282#define DHEAP 4
1283#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1284#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1285#define UPHEAP_DONE(p,k) ((p) == (k))
1286
1287/* away from the root */
1288inline_speed void
1289downheap (ANHE *heap, int N, int k)
1290{
1291 ANHE he = heap [k];
1292 ANHE *E = heap + N + HEAP0;
1293
1294 for (;;)
1295 {
1296 ev_tstamp minat;
1297 ANHE *minpos;
1298 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1299
1300 /* find minimum child */
1301 if (expect_true (pos + DHEAP - 1 < E))
1302 {
1303 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1304 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1305 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1306 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1307 }
1308 else if (pos < E)
1309 {
1310 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1311 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1312 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1313 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1314 }
1315 else
1316 break;
1317
1318 if (ANHE_at (he) <= minat)
1319 break;
1320
1321 heap [k] = *minpos;
1322 ev_active (ANHE_w (*minpos)) = k;
1323
1324 k = minpos - heap;
1325 }
1326
1327 heap [k] = he;
1328 ev_active (ANHE_w (he)) = k;
1329}
1330
1331#else /* 4HEAP */
1332
1333#define HEAP0 1
1334#define HPARENT(k) ((k) >> 1)
1335#define UPHEAP_DONE(p,k) (!(p))
1336
1337/* away from the root */
1338inline_speed void
1339downheap (ANHE *heap, int N, int k)
1340{
1341 ANHE he = heap [k];
1342
1343 for (;;)
1344 {
1345 int c = k << 1;
1346
1347 if (c >= N + HEAP0)
1348 break;
1349
1350 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1351 ? 1 : 0;
1352
1353 if (ANHE_at (he) <= ANHE_at (heap [c]))
1354 break;
1355
1356 heap [k] = heap [c];
1357 ev_active (ANHE_w (heap [k])) = k;
1358
1359 k = c;
1360 }
1361
1362 heap [k] = he;
1363 ev_active (ANHE_w (he)) = k;
1364}
1365#endif
1366
1367/* towards the root */
1368inline_speed void
1369upheap (ANHE *heap, int k)
1370{
1371 ANHE he = heap [k];
1372
1373 for (;;)
1374 {
1375 int p = HPARENT (k);
1376
1377 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1378 break;
1379
1380 heap [k] = heap [p];
1381 ev_active (ANHE_w (heap [k])) = k;
1382 k = p;
1383 }
1384
1385 heap [k] = he;
1386 ev_active (ANHE_w (he)) = k;
1387}
1388
1389/* move an element suitably so it is in a correct place */
1390inline_size void
1391adjustheap (ANHE *heap, int N, int k)
1392{
1393 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1394 upheap (heap, k);
1395 else
1396 downheap (heap, N, k);
1397}
1398
1399/* rebuild the heap: this function is used only once and executed rarely */
1400inline_size void
1401reheap (ANHE *heap, int N)
1402{
1403 int i;
1404
1405 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1406 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1407 for (i = 0; i < N; ++i)
1408 upheap (heap, i + HEAP0);
1409}
1410
1411/*****************************************************************************/
1412
1413/* associate signal watchers to a signal signal */
1414typedef struct
1415{
1416 EV_ATOMIC_T pending;
1417#if EV_MULTIPLICITY
1418 EV_P;
1419#endif
1420 WL head;
1421} ANSIG;
1422
1423static ANSIG signals [EV_NSIG - 1];
1424
1425/*****************************************************************************/
1426
1427#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1428
1429static void noinline ecb_cold
1430evpipe_init (EV_P)
1431{
1432 if (!ev_is_active (&pipe_w))
1433 {
1434# if EV_USE_EVENTFD
1435 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1436 if (evfd < 0 && errno == EINVAL)
1437 evfd = eventfd (0, 0);
1438
1439 if (evfd >= 0)
1440 {
1441 evpipe [0] = -1;
1442 fd_intern (evfd); /* doing it twice doesn't hurt */
1443 ev_io_set (&pipe_w, evfd, EV_READ);
1444 }
1445 else
1446# endif
1447 {
1448 while (pipe (evpipe))
1449 ev_syserr ("(libev) error creating signal/async pipe");
1450
1451 fd_intern (evpipe [0]);
1452 fd_intern (evpipe [1]);
1453 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1454 }
1455
1456 ev_io_start (EV_A_ &pipe_w);
1457 ev_unref (EV_A); /* watcher should not keep loop alive */
1458 }
1459}
1460
1461inline_speed void
1462evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1463{
1464 if (expect_true (*flag))
1465 return;
1466
1467 *flag = 1;
1468
1469 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1470
1471 pipe_write_skipped = 1;
1472
1473 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1474
1475 if (pipe_write_wanted)
1476 {
1477 int old_errno;
1478
1479 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1480
1481 old_errno = errno; /* save errno because write will clobber it */
1482
1483#if EV_USE_EVENTFD
1484 if (evfd >= 0)
1485 {
1486 uint64_t counter = 1;
1487 write (evfd, &counter, sizeof (uint64_t));
1488 }
1489 else
1490#endif
1491 {
1492 /* win32 people keep sending patches that change this write() to send() */
1493 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1494 /* so when you think this write should be a send instead, please find out */
1495 /* where your send() is from - it's definitely not the microsoft send, and */
1496 /* tell me. thank you. */
1497 write (evpipe [1], &(evpipe [1]), 1);
1498 }
1499
1500 errno = old_errno;
1501 }
1502}
1503
1504/* called whenever the libev signal pipe */
1505/* got some events (signal, async) */
1506static void
1507pipecb (EV_P_ ev_io *iow, int revents)
1508{
1509 int i;
1510
1511 if (revents & EV_READ)
1512 {
1513#if EV_USE_EVENTFD
1514 if (evfd >= 0)
1515 {
1516 uint64_t counter;
1517 read (evfd, &counter, sizeof (uint64_t));
1518 }
1519 else
1520#endif
1521 {
1522 char dummy;
1523 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1524 read (evpipe [0], &dummy, 1);
1525 }
1526 }
1527
1528 pipe_write_skipped = 0;
1529
1530#if EV_SIGNAL_ENABLE
1531 if (sig_pending)
1532 {
1533 sig_pending = 0;
1534
1535 for (i = EV_NSIG - 1; i--; )
1536 if (expect_false (signals [i].pending))
1537 ev_feed_signal_event (EV_A_ i + 1);
1538 }
1539#endif
1540
1541#if EV_ASYNC_ENABLE
1542 if (async_pending)
1543 {
1544 async_pending = 0;
1545
1546 for (i = asynccnt; i--; )
1547 if (asyncs [i]->sent)
1548 {
1549 asyncs [i]->sent = 0;
1550 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1551 }
1552 }
1553#endif
1554}
1555
1556/*****************************************************************************/
1557
1558void
1559ev_feed_signal (int signum)
1560{
1561#if EV_MULTIPLICITY
1562 EV_P = signals [signum - 1].loop;
1563
1564 if (!EV_A)
1565 return;
1566#endif
1567
1568 if (!ev_active (&pipe_w))
1569 return;
1570
1571 signals [signum - 1].pending = 1;
1572 evpipe_write (EV_A_ &sig_pending);
1573}
1574
1575static void
1576ev_sighandler (int signum)
1577{
781#ifndef _WIN32 1578#ifdef _WIN32
1579 signal (signum, ev_sighandler);
1580#endif
1581
1582 ev_feed_signal (signum);
1583}
1584
1585void noinline
1586ev_feed_signal_event (EV_P_ int signum)
1587{
1588 WL w;
1589
1590 if (expect_false (signum <= 0 || signum > EV_NSIG))
1591 return;
1592
1593 --signum;
1594
1595#if EV_MULTIPLICITY
1596 /* it is permissible to try to feed a signal to the wrong loop */
1597 /* or, likely more useful, feeding a signal nobody is waiting for */
1598
1599 if (expect_false (signals [signum].loop != EV_A))
1600 return;
1601#endif
1602
1603 signals [signum].pending = 0;
1604
1605 for (w = signals [signum].head; w; w = w->next)
1606 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1607}
1608
1609#if EV_USE_SIGNALFD
1610static void
1611sigfdcb (EV_P_ ev_io *iow, int revents)
1612{
1613 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1614
1615 for (;;)
1616 {
1617 ssize_t res = read (sigfd, si, sizeof (si));
1618
1619 /* not ISO-C, as res might be -1, but works with SuS */
1620 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1621 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1622
1623 if (res < (ssize_t)sizeof (si))
1624 break;
1625 }
1626}
1627#endif
1628
1629#endif
1630
1631/*****************************************************************************/
1632
1633#if EV_CHILD_ENABLE
1634static WL childs [EV_PID_HASHSIZE];
782 1635
783static ev_signal childev; 1636static ev_signal childev;
784 1637
785void inline_speed 1638#ifndef WIFCONTINUED
1639# define WIFCONTINUED(status) 0
1640#endif
1641
1642/* handle a single child status event */
1643inline_speed void
786child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1644child_reap (EV_P_ int chain, int pid, int status)
787{ 1645{
788 ev_child *w; 1646 ev_child *w;
1647 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
789 1648
790 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1649 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1650 {
791 if (w->pid == pid || !w->pid) 1651 if ((w->pid == pid || !w->pid)
1652 && (!traced || (w->flags & 1)))
792 { 1653 {
793 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1654 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
794 w->rpid = pid; 1655 w->rpid = pid;
795 w->rstatus = status; 1656 w->rstatus = status;
796 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1657 ev_feed_event (EV_A_ (W)w, EV_CHILD);
797 } 1658 }
1659 }
798} 1660}
799 1661
800#ifndef WCONTINUED 1662#ifndef WCONTINUED
801# define WCONTINUED 0 1663# define WCONTINUED 0
802#endif 1664#endif
803 1665
1666/* called on sigchld etc., calls waitpid */
804static void 1667static void
805childcb (EV_P_ ev_signal *sw, int revents) 1668childcb (EV_P_ ev_signal *sw, int revents)
806{ 1669{
807 int pid, status; 1670 int pid, status;
808 1671
… …
811 if (!WCONTINUED 1674 if (!WCONTINUED
812 || errno != EINVAL 1675 || errno != EINVAL
813 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1676 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
814 return; 1677 return;
815 1678
816 /* make sure we are called again until all childs have been reaped */ 1679 /* make sure we are called again until all children have been reaped */
817 /* we need to do it this way so that the callback gets called before we continue */ 1680 /* we need to do it this way so that the callback gets called before we continue */
818 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1681 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
819 1682
820 child_reap (EV_A_ sw, pid, pid, status); 1683 child_reap (EV_A_ pid, pid, status);
821 if (EV_PID_HASHSIZE > 1) 1684 if ((EV_PID_HASHSIZE) > 1)
822 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1685 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
823} 1686}
824 1687
825#endif 1688#endif
826 1689
827/*****************************************************************************/ 1690/*****************************************************************************/
828 1691
1692#if EV_USE_IOCP
1693# include "ev_iocp.c"
1694#endif
829#if EV_USE_PORT 1695#if EV_USE_PORT
830# include "ev_port.c" 1696# include "ev_port.c"
831#endif 1697#endif
832#if EV_USE_KQUEUE 1698#if EV_USE_KQUEUE
833# include "ev_kqueue.c" 1699# include "ev_kqueue.c"
… …
840#endif 1706#endif
841#if EV_USE_SELECT 1707#if EV_USE_SELECT
842# include "ev_select.c" 1708# include "ev_select.c"
843#endif 1709#endif
844 1710
845int 1711int ecb_cold
846ev_version_major (void) 1712ev_version_major (void)
847{ 1713{
848 return EV_VERSION_MAJOR; 1714 return EV_VERSION_MAJOR;
849} 1715}
850 1716
851int 1717int ecb_cold
852ev_version_minor (void) 1718ev_version_minor (void)
853{ 1719{
854 return EV_VERSION_MINOR; 1720 return EV_VERSION_MINOR;
855} 1721}
856 1722
857/* return true if we are running with elevated privileges and should ignore env variables */ 1723/* return true if we are running with elevated privileges and should ignore env variables */
858int inline_size 1724int inline_size ecb_cold
859enable_secure (void) 1725enable_secure (void)
860{ 1726{
861#ifdef _WIN32 1727#ifdef _WIN32
862 return 0; 1728 return 0;
863#else 1729#else
864 return getuid () != geteuid () 1730 return getuid () != geteuid ()
865 || getgid () != getegid (); 1731 || getgid () != getegid ();
866#endif 1732#endif
867} 1733}
868 1734
869unsigned int 1735unsigned int ecb_cold
870ev_supported_backends (void) 1736ev_supported_backends (void)
871{ 1737{
872 unsigned int flags = 0; 1738 unsigned int flags = 0;
873 1739
874 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1740 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
878 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1744 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
879 1745
880 return flags; 1746 return flags;
881} 1747}
882 1748
883unsigned int 1749unsigned int ecb_cold
884ev_recommended_backends (void) 1750ev_recommended_backends (void)
885{ 1751{
886 unsigned int flags = ev_supported_backends (); 1752 unsigned int flags = ev_supported_backends ();
887 1753
888#ifndef __NetBSD__ 1754#ifndef __NetBSD__
889 /* kqueue is borked on everything but netbsd apparently */ 1755 /* kqueue is borked on everything but netbsd apparently */
890 /* it usually doesn't work correctly on anything but sockets and pipes */ 1756 /* it usually doesn't work correctly on anything but sockets and pipes */
891 flags &= ~EVBACKEND_KQUEUE; 1757 flags &= ~EVBACKEND_KQUEUE;
892#endif 1758#endif
893#ifdef __APPLE__ 1759#ifdef __APPLE__
894 // flags &= ~EVBACKEND_KQUEUE; for documentation 1760 /* only select works correctly on that "unix-certified" platform */
895 flags &= ~EVBACKEND_POLL; 1761 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1762 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1763#endif
1764#ifdef __FreeBSD__
1765 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
896#endif 1766#endif
897 1767
898 return flags; 1768 return flags;
899} 1769}
900 1770
901unsigned int 1771unsigned int ecb_cold
902ev_embeddable_backends (void) 1772ev_embeddable_backends (void)
903{ 1773{
904 return EVBACKEND_EPOLL 1774 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
905 | EVBACKEND_KQUEUE 1775
906 | EVBACKEND_PORT; 1776 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1777 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1778 flags &= ~EVBACKEND_EPOLL;
1779
1780 return flags;
907} 1781}
908 1782
909unsigned int 1783unsigned int
910ev_backend (EV_P) 1784ev_backend (EV_P)
911{ 1785{
912 return backend; 1786 return backend;
913} 1787}
914 1788
1789#if EV_FEATURE_API
915unsigned int 1790unsigned int
916ev_loop_count (EV_P) 1791ev_iteration (EV_P)
917{ 1792{
918 return loop_count; 1793 return loop_count;
919} 1794}
920 1795
1796unsigned int
1797ev_depth (EV_P)
1798{
1799 return loop_depth;
1800}
1801
1802void
1803ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1804{
1805 io_blocktime = interval;
1806}
1807
1808void
1809ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1810{
1811 timeout_blocktime = interval;
1812}
1813
1814void
1815ev_set_userdata (EV_P_ void *data)
1816{
1817 userdata = data;
1818}
1819
1820void *
1821ev_userdata (EV_P)
1822{
1823 return userdata;
1824}
1825
1826void
1827ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1828{
1829 invoke_cb = invoke_pending_cb;
1830}
1831
1832void
1833ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1834{
1835 release_cb = release;
1836 acquire_cb = acquire;
1837}
1838#endif
1839
1840/* initialise a loop structure, must be zero-initialised */
921static void noinline 1841static void noinline ecb_cold
922loop_init (EV_P_ unsigned int flags) 1842loop_init (EV_P_ unsigned int flags)
923{ 1843{
924 if (!backend) 1844 if (!backend)
925 { 1845 {
1846 origflags = flags;
1847
1848#if EV_USE_REALTIME
1849 if (!have_realtime)
1850 {
1851 struct timespec ts;
1852
1853 if (!clock_gettime (CLOCK_REALTIME, &ts))
1854 have_realtime = 1;
1855 }
1856#endif
1857
926#if EV_USE_MONOTONIC 1858#if EV_USE_MONOTONIC
1859 if (!have_monotonic)
927 { 1860 {
928 struct timespec ts; 1861 struct timespec ts;
1862
929 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1863 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
930 have_monotonic = 1; 1864 have_monotonic = 1;
931 } 1865 }
932#endif 1866#endif
933
934 ev_rt_now = ev_time ();
935 mn_now = get_clock ();
936 now_floor = mn_now;
937 rtmn_diff = ev_rt_now - mn_now;
938 1867
939 /* pid check not overridable via env */ 1868 /* pid check not overridable via env */
940#ifndef _WIN32 1869#ifndef _WIN32
941 if (flags & EVFLAG_FORKCHECK) 1870 if (flags & EVFLAG_FORKCHECK)
942 curpid = getpid (); 1871 curpid = getpid ();
… …
945 if (!(flags & EVFLAG_NOENV) 1874 if (!(flags & EVFLAG_NOENV)
946 && !enable_secure () 1875 && !enable_secure ()
947 && getenv ("LIBEV_FLAGS")) 1876 && getenv ("LIBEV_FLAGS"))
948 flags = atoi (getenv ("LIBEV_FLAGS")); 1877 flags = atoi (getenv ("LIBEV_FLAGS"));
949 1878
950 if (!(flags & 0x0000ffffUL)) 1879 ev_rt_now = ev_time ();
1880 mn_now = get_clock ();
1881 now_floor = mn_now;
1882 rtmn_diff = ev_rt_now - mn_now;
1883#if EV_FEATURE_API
1884 invoke_cb = ev_invoke_pending;
1885#endif
1886
1887 io_blocktime = 0.;
1888 timeout_blocktime = 0.;
1889 backend = 0;
1890 backend_fd = -1;
1891 sig_pending = 0;
1892#if EV_ASYNC_ENABLE
1893 async_pending = 0;
1894#endif
1895 pipe_write_skipped = 0;
1896 pipe_write_wanted = 0;
1897#if EV_USE_INOTIFY
1898 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1899#endif
1900#if EV_USE_SIGNALFD
1901 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1902#endif
1903
1904 if (!(flags & EVBACKEND_MASK))
951 flags |= ev_recommended_backends (); 1905 flags |= ev_recommended_backends ();
952 1906
953 backend = 0;
954 backend_fd = -1;
955#if EV_USE_INOTIFY 1907#if EV_USE_IOCP
956 fs_fd = -2; 1908 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
957#endif 1909#endif
958
959#if EV_USE_PORT 1910#if EV_USE_PORT
960 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1911 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
961#endif 1912#endif
962#if EV_USE_KQUEUE 1913#if EV_USE_KQUEUE
963 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1914 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
970#endif 1921#endif
971#if EV_USE_SELECT 1922#if EV_USE_SELECT
972 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1923 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
973#endif 1924#endif
974 1925
1926 ev_prepare_init (&pending_w, pendingcb);
1927
1928#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
975 ev_init (&sigev, sigcb); 1929 ev_init (&pipe_w, pipecb);
976 ev_set_priority (&sigev, EV_MAXPRI); 1930 ev_set_priority (&pipe_w, EV_MAXPRI);
1931#endif
977 } 1932 }
978} 1933}
979 1934
980static void noinline 1935/* free up a loop structure */
1936void ecb_cold
981loop_destroy (EV_P) 1937ev_loop_destroy (EV_P)
982{ 1938{
983 int i; 1939 int i;
1940
1941#if EV_MULTIPLICITY
1942 /* mimic free (0) */
1943 if (!EV_A)
1944 return;
1945#endif
1946
1947#if EV_CLEANUP_ENABLE
1948 /* queue cleanup watchers (and execute them) */
1949 if (expect_false (cleanupcnt))
1950 {
1951 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1952 EV_INVOKE_PENDING;
1953 }
1954#endif
1955
1956#if EV_CHILD_ENABLE
1957 if (ev_is_active (&childev))
1958 {
1959 ev_ref (EV_A); /* child watcher */
1960 ev_signal_stop (EV_A_ &childev);
1961 }
1962#endif
1963
1964 if (ev_is_active (&pipe_w))
1965 {
1966 /*ev_ref (EV_A);*/
1967 /*ev_io_stop (EV_A_ &pipe_w);*/
1968
1969#if EV_USE_EVENTFD
1970 if (evfd >= 0)
1971 close (evfd);
1972#endif
1973
1974 if (evpipe [0] >= 0)
1975 {
1976 EV_WIN32_CLOSE_FD (evpipe [0]);
1977 EV_WIN32_CLOSE_FD (evpipe [1]);
1978 }
1979 }
1980
1981#if EV_USE_SIGNALFD
1982 if (ev_is_active (&sigfd_w))
1983 close (sigfd);
1984#endif
984 1985
985#if EV_USE_INOTIFY 1986#if EV_USE_INOTIFY
986 if (fs_fd >= 0) 1987 if (fs_fd >= 0)
987 close (fs_fd); 1988 close (fs_fd);
988#endif 1989#endif
989 1990
990 if (backend_fd >= 0) 1991 if (backend_fd >= 0)
991 close (backend_fd); 1992 close (backend_fd);
992 1993
1994#if EV_USE_IOCP
1995 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1996#endif
993#if EV_USE_PORT 1997#if EV_USE_PORT
994 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1998 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
995#endif 1999#endif
996#if EV_USE_KQUEUE 2000#if EV_USE_KQUEUE
997 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2001 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1012#if EV_IDLE_ENABLE 2016#if EV_IDLE_ENABLE
1013 array_free (idle, [i]); 2017 array_free (idle, [i]);
1014#endif 2018#endif
1015 } 2019 }
1016 2020
2021 ev_free (anfds); anfds = 0; anfdmax = 0;
2022
1017 /* have to use the microsoft-never-gets-it-right macro */ 2023 /* have to use the microsoft-never-gets-it-right macro */
2024 array_free (rfeed, EMPTY);
1018 array_free (fdchange, EMPTY); 2025 array_free (fdchange, EMPTY);
1019 array_free (timer, EMPTY); 2026 array_free (timer, EMPTY);
1020#if EV_PERIODIC_ENABLE 2027#if EV_PERIODIC_ENABLE
1021 array_free (periodic, EMPTY); 2028 array_free (periodic, EMPTY);
1022#endif 2029#endif
2030#if EV_FORK_ENABLE
2031 array_free (fork, EMPTY);
2032#endif
2033#if EV_CLEANUP_ENABLE
2034 array_free (cleanup, EMPTY);
2035#endif
1023 array_free (prepare, EMPTY); 2036 array_free (prepare, EMPTY);
1024 array_free (check, EMPTY); 2037 array_free (check, EMPTY);
2038#if EV_ASYNC_ENABLE
2039 array_free (async, EMPTY);
2040#endif
1025 2041
1026 backend = 0; 2042 backend = 0;
1027}
1028 2043
2044#if EV_MULTIPLICITY
2045 if (ev_is_default_loop (EV_A))
2046#endif
2047 ev_default_loop_ptr = 0;
2048#if EV_MULTIPLICITY
2049 else
2050 ev_free (EV_A);
2051#endif
2052}
2053
2054#if EV_USE_INOTIFY
1029void inline_size infy_fork (EV_P); 2055inline_size void infy_fork (EV_P);
2056#endif
1030 2057
1031void inline_size 2058inline_size void
1032loop_fork (EV_P) 2059loop_fork (EV_P)
1033{ 2060{
1034#if EV_USE_PORT 2061#if EV_USE_PORT
1035 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2062 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1036#endif 2063#endif
… …
1042#endif 2069#endif
1043#if EV_USE_INOTIFY 2070#if EV_USE_INOTIFY
1044 infy_fork (EV_A); 2071 infy_fork (EV_A);
1045#endif 2072#endif
1046 2073
1047 if (ev_is_active (&sigev)) 2074 if (ev_is_active (&pipe_w))
1048 { 2075 {
1049 /* default loop */ 2076 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1050 2077
1051 ev_ref (EV_A); 2078 ev_ref (EV_A);
1052 ev_io_stop (EV_A_ &sigev); 2079 ev_io_stop (EV_A_ &pipe_w);
1053 close (sigpipe [0]);
1054 close (sigpipe [1]);
1055 2080
1056 while (pipe (sigpipe)) 2081#if EV_USE_EVENTFD
1057 syserr ("(libev) error creating pipe"); 2082 if (evfd >= 0)
2083 close (evfd);
2084#endif
1058 2085
2086 if (evpipe [0] >= 0)
2087 {
2088 EV_WIN32_CLOSE_FD (evpipe [0]);
2089 EV_WIN32_CLOSE_FD (evpipe [1]);
2090 }
2091
2092#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1059 siginit (EV_A); 2093 evpipe_init (EV_A);
2094 /* now iterate over everything, in case we missed something */
2095 pipecb (EV_A_ &pipe_w, EV_READ);
2096#endif
1060 } 2097 }
1061 2098
1062 postfork = 0; 2099 postfork = 0;
1063} 2100}
1064 2101
1065#if EV_MULTIPLICITY 2102#if EV_MULTIPLICITY
2103
1066struct ev_loop * 2104struct ev_loop * ecb_cold
1067ev_loop_new (unsigned int flags) 2105ev_loop_new (unsigned int flags)
1068{ 2106{
1069 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2107 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1070 2108
1071 memset (loop, 0, sizeof (struct ev_loop)); 2109 memset (EV_A, 0, sizeof (struct ev_loop));
1072
1073 loop_init (EV_A_ flags); 2110 loop_init (EV_A_ flags);
1074 2111
1075 if (ev_backend (EV_A)) 2112 if (ev_backend (EV_A))
1076 return loop; 2113 return EV_A;
1077 2114
2115 ev_free (EV_A);
1078 return 0; 2116 return 0;
1079} 2117}
1080 2118
1081void 2119#endif /* multiplicity */
1082ev_loop_destroy (EV_P)
1083{
1084 loop_destroy (EV_A);
1085 ev_free (loop);
1086}
1087 2120
1088void 2121#if EV_VERIFY
1089ev_loop_fork (EV_P) 2122static void noinline ecb_cold
2123verify_watcher (EV_P_ W w)
1090{ 2124{
1091 postfork = 1; 2125 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1092}
1093 2126
2127 if (w->pending)
2128 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2129}
2130
2131static void noinline ecb_cold
2132verify_heap (EV_P_ ANHE *heap, int N)
2133{
2134 int i;
2135
2136 for (i = HEAP0; i < N + HEAP0; ++i)
2137 {
2138 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2139 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2140 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2141
2142 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2143 }
2144}
2145
2146static void noinline ecb_cold
2147array_verify (EV_P_ W *ws, int cnt)
2148{
2149 while (cnt--)
2150 {
2151 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2152 verify_watcher (EV_A_ ws [cnt]);
2153 }
2154}
2155#endif
2156
2157#if EV_FEATURE_API
2158void ecb_cold
2159ev_verify (EV_P)
2160{
2161#if EV_VERIFY
2162 int i;
2163 WL w;
2164
2165 assert (activecnt >= -1);
2166
2167 assert (fdchangemax >= fdchangecnt);
2168 for (i = 0; i < fdchangecnt; ++i)
2169 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2170
2171 assert (anfdmax >= 0);
2172 for (i = 0; i < anfdmax; ++i)
2173 for (w = anfds [i].head; w; w = w->next)
2174 {
2175 verify_watcher (EV_A_ (W)w);
2176 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2177 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2178 }
2179
2180 assert (timermax >= timercnt);
2181 verify_heap (EV_A_ timers, timercnt);
2182
2183#if EV_PERIODIC_ENABLE
2184 assert (periodicmax >= periodiccnt);
2185 verify_heap (EV_A_ periodics, periodiccnt);
2186#endif
2187
2188 for (i = NUMPRI; i--; )
2189 {
2190 assert (pendingmax [i] >= pendingcnt [i]);
2191#if EV_IDLE_ENABLE
2192 assert (idleall >= 0);
2193 assert (idlemax [i] >= idlecnt [i]);
2194 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2195#endif
2196 }
2197
2198#if EV_FORK_ENABLE
2199 assert (forkmax >= forkcnt);
2200 array_verify (EV_A_ (W *)forks, forkcnt);
2201#endif
2202
2203#if EV_CLEANUP_ENABLE
2204 assert (cleanupmax >= cleanupcnt);
2205 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2206#endif
2207
2208#if EV_ASYNC_ENABLE
2209 assert (asyncmax >= asynccnt);
2210 array_verify (EV_A_ (W *)asyncs, asynccnt);
2211#endif
2212
2213#if EV_PREPARE_ENABLE
2214 assert (preparemax >= preparecnt);
2215 array_verify (EV_A_ (W *)prepares, preparecnt);
2216#endif
2217
2218#if EV_CHECK_ENABLE
2219 assert (checkmax >= checkcnt);
2220 array_verify (EV_A_ (W *)checks, checkcnt);
2221#endif
2222
2223# if 0
2224#if EV_CHILD_ENABLE
2225 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2226 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2227#endif
2228# endif
2229#endif
2230}
1094#endif 2231#endif
1095 2232
1096#if EV_MULTIPLICITY 2233#if EV_MULTIPLICITY
1097struct ev_loop * 2234struct ev_loop * ecb_cold
1098ev_default_loop_init (unsigned int flags)
1099#else 2235#else
1100int 2236int
2237#endif
1101ev_default_loop (unsigned int flags) 2238ev_default_loop (unsigned int flags)
1102#endif
1103{ 2239{
1104 if (sigpipe [0] == sigpipe [1])
1105 if (pipe (sigpipe))
1106 return 0;
1107
1108 if (!ev_default_loop_ptr) 2240 if (!ev_default_loop_ptr)
1109 { 2241 {
1110#if EV_MULTIPLICITY 2242#if EV_MULTIPLICITY
1111 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2243 EV_P = ev_default_loop_ptr = &default_loop_struct;
1112#else 2244#else
1113 ev_default_loop_ptr = 1; 2245 ev_default_loop_ptr = 1;
1114#endif 2246#endif
1115 2247
1116 loop_init (EV_A_ flags); 2248 loop_init (EV_A_ flags);
1117 2249
1118 if (ev_backend (EV_A)) 2250 if (ev_backend (EV_A))
1119 { 2251 {
1120 siginit (EV_A); 2252#if EV_CHILD_ENABLE
1121
1122#ifndef _WIN32
1123 ev_signal_init (&childev, childcb, SIGCHLD); 2253 ev_signal_init (&childev, childcb, SIGCHLD);
1124 ev_set_priority (&childev, EV_MAXPRI); 2254 ev_set_priority (&childev, EV_MAXPRI);
1125 ev_signal_start (EV_A_ &childev); 2255 ev_signal_start (EV_A_ &childev);
1126 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2256 ev_unref (EV_A); /* child watcher should not keep loop alive */
1127#endif 2257#endif
… …
1132 2262
1133 return ev_default_loop_ptr; 2263 return ev_default_loop_ptr;
1134} 2264}
1135 2265
1136void 2266void
1137ev_default_destroy (void) 2267ev_loop_fork (EV_P)
1138{ 2268{
1139#if EV_MULTIPLICITY 2269 postfork = 1; /* must be in line with ev_default_fork */
1140 struct ev_loop *loop = ev_default_loop_ptr;
1141#endif
1142
1143#ifndef _WIN32
1144 ev_ref (EV_A); /* child watcher */
1145 ev_signal_stop (EV_A_ &childev);
1146#endif
1147
1148 ev_ref (EV_A); /* signal watcher */
1149 ev_io_stop (EV_A_ &sigev);
1150
1151 close (sigpipe [0]); sigpipe [0] = 0;
1152 close (sigpipe [1]); sigpipe [1] = 0;
1153
1154 loop_destroy (EV_A);
1155}
1156
1157void
1158ev_default_fork (void)
1159{
1160#if EV_MULTIPLICITY
1161 struct ev_loop *loop = ev_default_loop_ptr;
1162#endif
1163
1164 if (backend)
1165 postfork = 1;
1166} 2270}
1167 2271
1168/*****************************************************************************/ 2272/*****************************************************************************/
1169 2273
1170void 2274void
1171ev_invoke (EV_P_ void *w, int revents) 2275ev_invoke (EV_P_ void *w, int revents)
1172{ 2276{
1173 EV_CB_INVOKE ((W)w, revents); 2277 EV_CB_INVOKE ((W)w, revents);
1174} 2278}
1175 2279
1176void inline_speed 2280unsigned int
1177call_pending (EV_P) 2281ev_pending_count (EV_P)
2282{
2283 int pri;
2284 unsigned int count = 0;
2285
2286 for (pri = NUMPRI; pri--; )
2287 count += pendingcnt [pri];
2288
2289 return count;
2290}
2291
2292void noinline
2293ev_invoke_pending (EV_P)
1178{ 2294{
1179 int pri; 2295 int pri;
1180 2296
1181 for (pri = NUMPRI; pri--; ) 2297 for (pri = NUMPRI; pri--; )
1182 while (pendingcnt [pri]) 2298 while (pendingcnt [pri])
1183 { 2299 {
1184 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2300 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1185 2301
1186 if (expect_true (p->w))
1187 {
1188 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1189
1190 p->w->pending = 0; 2302 p->w->pending = 0;
1191 EV_CB_INVOKE (p->w, p->events); 2303 EV_CB_INVOKE (p->w, p->events);
1192 } 2304 EV_FREQUENT_CHECK;
1193 } 2305 }
1194} 2306}
1195 2307
1196void inline_size
1197timers_reify (EV_P)
1198{
1199 while (timercnt && ((WT)timers [0])->at <= mn_now)
1200 {
1201 ev_timer *w = timers [0];
1202
1203 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1204
1205 /* first reschedule or stop timer */
1206 if (w->repeat)
1207 {
1208 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1209
1210 ((WT)w)->at += w->repeat;
1211 if (((WT)w)->at < mn_now)
1212 ((WT)w)->at = mn_now;
1213
1214 downheap ((WT *)timers, timercnt, 0);
1215 }
1216 else
1217 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1218
1219 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1220 }
1221}
1222
1223#if EV_PERIODIC_ENABLE
1224void inline_size
1225periodics_reify (EV_P)
1226{
1227 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1228 {
1229 ev_periodic *w = periodics [0];
1230
1231 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1232
1233 /* first reschedule or stop timer */
1234 if (w->reschedule_cb)
1235 {
1236 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1237 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1238 downheap ((WT *)periodics, periodiccnt, 0);
1239 }
1240 else if (w->interval)
1241 {
1242 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1243 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1244 downheap ((WT *)periodics, periodiccnt, 0);
1245 }
1246 else
1247 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1248
1249 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1250 }
1251}
1252
1253static void noinline
1254periodics_reschedule (EV_P)
1255{
1256 int i;
1257
1258 /* adjust periodics after time jump */
1259 for (i = 0; i < periodiccnt; ++i)
1260 {
1261 ev_periodic *w = periodics [i];
1262
1263 if (w->reschedule_cb)
1264 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1265 else if (w->interval)
1266 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1267 }
1268
1269 /* now rebuild the heap */
1270 for (i = periodiccnt >> 1; i--; )
1271 downheap ((WT *)periodics, periodiccnt, i);
1272}
1273#endif
1274
1275#if EV_IDLE_ENABLE 2308#if EV_IDLE_ENABLE
1276void inline_size 2309/* make idle watchers pending. this handles the "call-idle */
2310/* only when higher priorities are idle" logic */
2311inline_size void
1277idle_reify (EV_P) 2312idle_reify (EV_P)
1278{ 2313{
1279 if (expect_false (idleall)) 2314 if (expect_false (idleall))
1280 { 2315 {
1281 int pri; 2316 int pri;
… …
1293 } 2328 }
1294 } 2329 }
1295} 2330}
1296#endif 2331#endif
1297 2332
1298int inline_size 2333/* make timers pending */
1299time_update_monotonic (EV_P) 2334inline_size void
2335timers_reify (EV_P)
1300{ 2336{
2337 EV_FREQUENT_CHECK;
2338
2339 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2340 {
2341 do
2342 {
2343 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2344
2345 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2346
2347 /* first reschedule or stop timer */
2348 if (w->repeat)
2349 {
2350 ev_at (w) += w->repeat;
2351 if (ev_at (w) < mn_now)
2352 ev_at (w) = mn_now;
2353
2354 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2355
2356 ANHE_at_cache (timers [HEAP0]);
2357 downheap (timers, timercnt, HEAP0);
2358 }
2359 else
2360 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2361
2362 EV_FREQUENT_CHECK;
2363 feed_reverse (EV_A_ (W)w);
2364 }
2365 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2366
2367 feed_reverse_done (EV_A_ EV_TIMER);
2368 }
2369}
2370
2371#if EV_PERIODIC_ENABLE
2372
2373static void noinline
2374periodic_recalc (EV_P_ ev_periodic *w)
2375{
2376 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2377 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2378
2379 /* the above almost always errs on the low side */
2380 while (at <= ev_rt_now)
2381 {
2382 ev_tstamp nat = at + w->interval;
2383
2384 /* when resolution fails us, we use ev_rt_now */
2385 if (expect_false (nat == at))
2386 {
2387 at = ev_rt_now;
2388 break;
2389 }
2390
2391 at = nat;
2392 }
2393
2394 ev_at (w) = at;
2395}
2396
2397/* make periodics pending */
2398inline_size void
2399periodics_reify (EV_P)
2400{
2401 EV_FREQUENT_CHECK;
2402
2403 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2404 {
2405 int feed_count = 0;
2406
2407 do
2408 {
2409 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2410
2411 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2412
2413 /* first reschedule or stop timer */
2414 if (w->reschedule_cb)
2415 {
2416 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2417
2418 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2419
2420 ANHE_at_cache (periodics [HEAP0]);
2421 downheap (periodics, periodiccnt, HEAP0);
2422 }
2423 else if (w->interval)
2424 {
2425 periodic_recalc (EV_A_ w);
2426 ANHE_at_cache (periodics [HEAP0]);
2427 downheap (periodics, periodiccnt, HEAP0);
2428 }
2429 else
2430 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2431
2432 EV_FREQUENT_CHECK;
2433 feed_reverse (EV_A_ (W)w);
2434 }
2435 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2436
2437 feed_reverse_done (EV_A_ EV_PERIODIC);
2438 }
2439}
2440
2441/* simply recalculate all periodics */
2442/* TODO: maybe ensure that at least one event happens when jumping forward? */
2443static void noinline ecb_cold
2444periodics_reschedule (EV_P)
2445{
2446 int i;
2447
2448 /* adjust periodics after time jump */
2449 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2450 {
2451 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2452
2453 if (w->reschedule_cb)
2454 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2455 else if (w->interval)
2456 periodic_recalc (EV_A_ w);
2457
2458 ANHE_at_cache (periodics [i]);
2459 }
2460
2461 reheap (periodics, periodiccnt);
2462}
2463#endif
2464
2465/* adjust all timers by a given offset */
2466static void noinline ecb_cold
2467timers_reschedule (EV_P_ ev_tstamp adjust)
2468{
2469 int i;
2470
2471 for (i = 0; i < timercnt; ++i)
2472 {
2473 ANHE *he = timers + i + HEAP0;
2474 ANHE_w (*he)->at += adjust;
2475 ANHE_at_cache (*he);
2476 }
2477}
2478
2479/* fetch new monotonic and realtime times from the kernel */
2480/* also detect if there was a timejump, and act accordingly */
2481inline_speed void
2482time_update (EV_P_ ev_tstamp max_block)
2483{
2484#if EV_USE_MONOTONIC
2485 if (expect_true (have_monotonic))
2486 {
2487 int i;
2488 ev_tstamp odiff = rtmn_diff;
2489
1301 mn_now = get_clock (); 2490 mn_now = get_clock ();
1302 2491
2492 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2493 /* interpolate in the meantime */
1303 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2494 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1304 { 2495 {
1305 ev_rt_now = rtmn_diff + mn_now; 2496 ev_rt_now = rtmn_diff + mn_now;
1306 return 0; 2497 return;
1307 } 2498 }
1308 else 2499
1309 {
1310 now_floor = mn_now; 2500 now_floor = mn_now;
1311 ev_rt_now = ev_time (); 2501 ev_rt_now = ev_time ();
1312 return 1;
1313 }
1314}
1315 2502
1316void inline_size 2503 /* loop a few times, before making important decisions.
1317time_update (EV_P) 2504 * on the choice of "4": one iteration isn't enough,
1318{ 2505 * in case we get preempted during the calls to
1319 int i; 2506 * ev_time and get_clock. a second call is almost guaranteed
1320 2507 * to succeed in that case, though. and looping a few more times
1321#if EV_USE_MONOTONIC 2508 * doesn't hurt either as we only do this on time-jumps or
1322 if (expect_true (have_monotonic)) 2509 * in the unlikely event of having been preempted here.
1323 { 2510 */
1324 if (time_update_monotonic (EV_A)) 2511 for (i = 4; --i; )
1325 { 2512 {
1326 ev_tstamp odiff = rtmn_diff; 2513 ev_tstamp diff;
1327
1328 /* loop a few times, before making important decisions.
1329 * on the choice of "4": one iteration isn't enough,
1330 * in case we get preempted during the calls to
1331 * ev_time and get_clock. a second call is almost guaranteed
1332 * to succeed in that case, though. and looping a few more times
1333 * doesn't hurt either as we only do this on time-jumps or
1334 * in the unlikely event of having been preempted here.
1335 */
1336 for (i = 4; --i; )
1337 {
1338 rtmn_diff = ev_rt_now - mn_now; 2514 rtmn_diff = ev_rt_now - mn_now;
1339 2515
1340 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2516 diff = odiff - rtmn_diff;
2517
2518 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1341 return; /* all is well */ 2519 return; /* all is well */
1342 2520
1343 ev_rt_now = ev_time (); 2521 ev_rt_now = ev_time ();
1344 mn_now = get_clock (); 2522 mn_now = get_clock ();
1345 now_floor = mn_now; 2523 now_floor = mn_now;
1346 } 2524 }
1347 2525
2526 /* no timer adjustment, as the monotonic clock doesn't jump */
2527 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1348# if EV_PERIODIC_ENABLE 2528# if EV_PERIODIC_ENABLE
1349 periodics_reschedule (EV_A); 2529 periodics_reschedule (EV_A);
1350# endif 2530# endif
1351 /* no timer adjustment, as the monotonic clock doesn't jump */
1352 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1353 }
1354 } 2531 }
1355 else 2532 else
1356#endif 2533#endif
1357 { 2534 {
1358 ev_rt_now = ev_time (); 2535 ev_rt_now = ev_time ();
1359 2536
1360 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2537 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1361 { 2538 {
2539 /* adjust timers. this is easy, as the offset is the same for all of them */
2540 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1362#if EV_PERIODIC_ENABLE 2541#if EV_PERIODIC_ENABLE
1363 periodics_reschedule (EV_A); 2542 periodics_reschedule (EV_A);
1364#endif 2543#endif
1365
1366 /* adjust timers. this is easy, as the offset is the same for all of them */
1367 for (i = 0; i < timercnt; ++i)
1368 ((WT)timers [i])->at += ev_rt_now - mn_now;
1369 } 2544 }
1370 2545
1371 mn_now = ev_rt_now; 2546 mn_now = ev_rt_now;
1372 } 2547 }
1373} 2548}
1374 2549
1375void 2550void
1376ev_ref (EV_P)
1377{
1378 ++activecnt;
1379}
1380
1381void
1382ev_unref (EV_P)
1383{
1384 --activecnt;
1385}
1386
1387static int loop_done;
1388
1389void
1390ev_loop (EV_P_ int flags) 2551ev_run (EV_P_ int flags)
1391{ 2552{
1392 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2553#if EV_FEATURE_API
1393 ? EVUNLOOP_ONE 2554 ++loop_depth;
1394 : EVUNLOOP_CANCEL; 2555#endif
1395 2556
2557 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2558
2559 loop_done = EVBREAK_CANCEL;
2560
1396 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2561 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1397 2562
1398 do 2563 do
1399 { 2564 {
2565#if EV_VERIFY >= 2
2566 ev_verify (EV_A);
2567#endif
2568
1400#ifndef _WIN32 2569#ifndef _WIN32
1401 if (expect_false (curpid)) /* penalise the forking check even more */ 2570 if (expect_false (curpid)) /* penalise the forking check even more */
1402 if (expect_false (getpid () != curpid)) 2571 if (expect_false (getpid () != curpid))
1403 { 2572 {
1404 curpid = getpid (); 2573 curpid = getpid ();
… …
1410 /* we might have forked, so queue fork handlers */ 2579 /* we might have forked, so queue fork handlers */
1411 if (expect_false (postfork)) 2580 if (expect_false (postfork))
1412 if (forkcnt) 2581 if (forkcnt)
1413 { 2582 {
1414 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2583 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1415 call_pending (EV_A); 2584 EV_INVOKE_PENDING;
1416 } 2585 }
1417#endif 2586#endif
1418 2587
2588#if EV_PREPARE_ENABLE
1419 /* queue check watchers (and execute them) */ 2589 /* queue prepare watchers (and execute them) */
1420 if (expect_false (preparecnt)) 2590 if (expect_false (preparecnt))
1421 { 2591 {
1422 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2592 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1423 call_pending (EV_A); 2593 EV_INVOKE_PENDING;
1424 } 2594 }
2595#endif
1425 2596
1426 if (expect_false (!activecnt)) 2597 if (expect_false (loop_done))
1427 break; 2598 break;
1428 2599
1429 /* we might have forked, so reify kernel state if necessary */ 2600 /* we might have forked, so reify kernel state if necessary */
1430 if (expect_false (postfork)) 2601 if (expect_false (postfork))
1431 loop_fork (EV_A); 2602 loop_fork (EV_A);
… …
1433 /* update fd-related kernel structures */ 2604 /* update fd-related kernel structures */
1434 fd_reify (EV_A); 2605 fd_reify (EV_A);
1435 2606
1436 /* calculate blocking time */ 2607 /* calculate blocking time */
1437 { 2608 {
1438 ev_tstamp block; 2609 ev_tstamp waittime = 0.;
2610 ev_tstamp sleeptime = 0.;
1439 2611
1440 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2612 /* remember old timestamp for io_blocktime calculation */
1441 block = 0.; /* do not block at all */ 2613 ev_tstamp prev_mn_now = mn_now;
1442 else 2614
2615 /* update time to cancel out callback processing overhead */
2616 time_update (EV_A_ 1e100);
2617
2618 /* from now on, we want a pipe-wake-up */
2619 pipe_write_wanted = 1;
2620
2621 ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
2622
2623 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1443 { 2624 {
1444 /* update time to cancel out callback processing overhead */
1445#if EV_USE_MONOTONIC
1446 if (expect_true (have_monotonic))
1447 time_update_monotonic (EV_A);
1448 else
1449#endif
1450 {
1451 ev_rt_now = ev_time ();
1452 mn_now = ev_rt_now;
1453 }
1454
1455 block = MAX_BLOCKTIME; 2625 waittime = MAX_BLOCKTIME;
1456 2626
1457 if (timercnt) 2627 if (timercnt)
1458 { 2628 {
1459 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2629 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1460 if (block > to) block = to; 2630 if (waittime > to) waittime = to;
1461 } 2631 }
1462 2632
1463#if EV_PERIODIC_ENABLE 2633#if EV_PERIODIC_ENABLE
1464 if (periodiccnt) 2634 if (periodiccnt)
1465 { 2635 {
1466 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2636 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1467 if (block > to) block = to; 2637 if (waittime > to) waittime = to;
1468 } 2638 }
1469#endif 2639#endif
1470 2640
2641 /* don't let timeouts decrease the waittime below timeout_blocktime */
2642 if (expect_false (waittime < timeout_blocktime))
2643 waittime = timeout_blocktime;
2644
2645 /* at this point, we NEED to wait, so we have to ensure */
2646 /* to pass a minimum nonzero value to the backend */
2647 if (expect_false (waittime < backend_mintime))
2648 waittime = backend_mintime;
2649
2650 /* extra check because io_blocktime is commonly 0 */
1471 if (expect_false (block < 0.)) block = 0.; 2651 if (expect_false (io_blocktime))
2652 {
2653 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2654
2655 if (sleeptime > waittime - backend_mintime)
2656 sleeptime = waittime - backend_mintime;
2657
2658 if (expect_true (sleeptime > 0.))
2659 {
2660 ev_sleep (sleeptime);
2661 waittime -= sleeptime;
2662 }
2663 }
1472 } 2664 }
1473 2665
2666#if EV_FEATURE_API
1474 ++loop_count; 2667 ++loop_count;
2668#endif
2669 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1475 backend_poll (EV_A_ block); 2670 backend_poll (EV_A_ waittime);
2671 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2672
2673 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2674
2675 if (pipe_write_skipped)
2676 {
2677 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2678 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2679 }
2680
2681
2682 /* update ev_rt_now, do magic */
2683 time_update (EV_A_ waittime + sleeptime);
1476 } 2684 }
1477
1478 /* update ev_rt_now, do magic */
1479 time_update (EV_A);
1480 2685
1481 /* queue pending timers and reschedule them */ 2686 /* queue pending timers and reschedule them */
1482 timers_reify (EV_A); /* relative timers called last */ 2687 timers_reify (EV_A); /* relative timers called last */
1483#if EV_PERIODIC_ENABLE 2688#if EV_PERIODIC_ENABLE
1484 periodics_reify (EV_A); /* absolute timers called first */ 2689 periodics_reify (EV_A); /* absolute timers called first */
… …
1487#if EV_IDLE_ENABLE 2692#if EV_IDLE_ENABLE
1488 /* queue idle watchers unless other events are pending */ 2693 /* queue idle watchers unless other events are pending */
1489 idle_reify (EV_A); 2694 idle_reify (EV_A);
1490#endif 2695#endif
1491 2696
2697#if EV_CHECK_ENABLE
1492 /* queue check watchers, to be executed first */ 2698 /* queue check watchers, to be executed first */
1493 if (expect_false (checkcnt)) 2699 if (expect_false (checkcnt))
1494 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2700 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2701#endif
1495 2702
1496 call_pending (EV_A); 2703 EV_INVOKE_PENDING;
1497
1498 } 2704 }
1499 while (expect_true (activecnt && !loop_done)); 2705 while (expect_true (
2706 activecnt
2707 && !loop_done
2708 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2709 ));
1500 2710
1501 if (loop_done == EVUNLOOP_ONE) 2711 if (loop_done == EVBREAK_ONE)
1502 loop_done = EVUNLOOP_CANCEL; 2712 loop_done = EVBREAK_CANCEL;
2713
2714#if EV_FEATURE_API
2715 --loop_depth;
2716#endif
1503} 2717}
1504 2718
1505void 2719void
1506ev_unloop (EV_P_ int how) 2720ev_break (EV_P_ int how)
1507{ 2721{
1508 loop_done = how; 2722 loop_done = how;
1509} 2723}
1510 2724
2725void
2726ev_ref (EV_P)
2727{
2728 ++activecnt;
2729}
2730
2731void
2732ev_unref (EV_P)
2733{
2734 --activecnt;
2735}
2736
2737void
2738ev_now_update (EV_P)
2739{
2740 time_update (EV_A_ 1e100);
2741}
2742
2743void
2744ev_suspend (EV_P)
2745{
2746 ev_now_update (EV_A);
2747}
2748
2749void
2750ev_resume (EV_P)
2751{
2752 ev_tstamp mn_prev = mn_now;
2753
2754 ev_now_update (EV_A);
2755 timers_reschedule (EV_A_ mn_now - mn_prev);
2756#if EV_PERIODIC_ENABLE
2757 /* TODO: really do this? */
2758 periodics_reschedule (EV_A);
2759#endif
2760}
2761
1511/*****************************************************************************/ 2762/*****************************************************************************/
2763/* singly-linked list management, used when the expected list length is short */
1512 2764
1513void inline_size 2765inline_size void
1514wlist_add (WL *head, WL elem) 2766wlist_add (WL *head, WL elem)
1515{ 2767{
1516 elem->next = *head; 2768 elem->next = *head;
1517 *head = elem; 2769 *head = elem;
1518} 2770}
1519 2771
1520void inline_size 2772inline_size void
1521wlist_del (WL *head, WL elem) 2773wlist_del (WL *head, WL elem)
1522{ 2774{
1523 while (*head) 2775 while (*head)
1524 { 2776 {
1525 if (*head == elem) 2777 if (expect_true (*head == elem))
1526 { 2778 {
1527 *head = elem->next; 2779 *head = elem->next;
1528 return; 2780 break;
1529 } 2781 }
1530 2782
1531 head = &(*head)->next; 2783 head = &(*head)->next;
1532 } 2784 }
1533} 2785}
1534 2786
1535void inline_speed 2787/* internal, faster, version of ev_clear_pending */
2788inline_speed void
1536clear_pending (EV_P_ W w) 2789clear_pending (EV_P_ W w)
1537{ 2790{
1538 if (w->pending) 2791 if (w->pending)
1539 { 2792 {
1540 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2793 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1541 w->pending = 0; 2794 w->pending = 0;
1542 } 2795 }
1543} 2796}
1544 2797
1545int 2798int
1546ev_clear_pending (EV_P_ void *w) 2799ev_clear_pending (EV_P_ void *w)
1547{ 2800{
1548 W w_ = (W)w; 2801 W w_ = (W)w;
1549 int pending = w_->pending; 2802 int pending = w_->pending;
1550 2803
1551 if (!pending) 2804 if (expect_true (pending))
2805 {
2806 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2807 p->w = (W)&pending_w;
2808 w_->pending = 0;
2809 return p->events;
2810 }
2811 else
1552 return 0; 2812 return 0;
1553
1554 w_->pending = 0;
1555 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1556 p->w = 0;
1557
1558 return p->events;
1559} 2813}
1560 2814
1561void inline_size 2815inline_size void
1562pri_adjust (EV_P_ W w) 2816pri_adjust (EV_P_ W w)
1563{ 2817{
1564 int pri = w->priority; 2818 int pri = ev_priority (w);
1565 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2819 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1566 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2820 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1567 w->priority = pri; 2821 ev_set_priority (w, pri);
1568} 2822}
1569 2823
1570void inline_speed 2824inline_speed void
1571ev_start (EV_P_ W w, int active) 2825ev_start (EV_P_ W w, int active)
1572{ 2826{
1573 pri_adjust (EV_A_ w); 2827 pri_adjust (EV_A_ w);
1574 w->active = active; 2828 w->active = active;
1575 ev_ref (EV_A); 2829 ev_ref (EV_A);
1576} 2830}
1577 2831
1578void inline_size 2832inline_size void
1579ev_stop (EV_P_ W w) 2833ev_stop (EV_P_ W w)
1580{ 2834{
1581 ev_unref (EV_A); 2835 ev_unref (EV_A);
1582 w->active = 0; 2836 w->active = 0;
1583} 2837}
1584 2838
1585/*****************************************************************************/ 2839/*****************************************************************************/
1586 2840
1587void 2841void noinline
1588ev_io_start (EV_P_ ev_io *w) 2842ev_io_start (EV_P_ ev_io *w)
1589{ 2843{
1590 int fd = w->fd; 2844 int fd = w->fd;
1591 2845
1592 if (expect_false (ev_is_active (w))) 2846 if (expect_false (ev_is_active (w)))
1593 return; 2847 return;
1594 2848
1595 assert (("ev_io_start called with negative fd", fd >= 0)); 2849 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2850 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2851
2852 EV_FREQUENT_CHECK;
1596 2853
1597 ev_start (EV_A_ (W)w, 1); 2854 ev_start (EV_A_ (W)w, 1);
1598 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2855 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1599 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2856 wlist_add (&anfds[fd].head, (WL)w);
1600 2857
1601 fd_change (EV_A_ fd); 2858 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1602} 2859 w->events &= ~EV__IOFDSET;
1603 2860
1604void 2861 EV_FREQUENT_CHECK;
2862}
2863
2864void noinline
1605ev_io_stop (EV_P_ ev_io *w) 2865ev_io_stop (EV_P_ ev_io *w)
1606{ 2866{
1607 clear_pending (EV_A_ (W)w); 2867 clear_pending (EV_A_ (W)w);
1608 if (expect_false (!ev_is_active (w))) 2868 if (expect_false (!ev_is_active (w)))
1609 return; 2869 return;
1610 2870
1611 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2871 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1612 2872
2873 EV_FREQUENT_CHECK;
2874
1613 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2875 wlist_del (&anfds[w->fd].head, (WL)w);
1614 ev_stop (EV_A_ (W)w); 2876 ev_stop (EV_A_ (W)w);
1615 2877
1616 fd_change (EV_A_ w->fd); 2878 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1617}
1618 2879
1619void 2880 EV_FREQUENT_CHECK;
2881}
2882
2883void noinline
1620ev_timer_start (EV_P_ ev_timer *w) 2884ev_timer_start (EV_P_ ev_timer *w)
1621{ 2885{
1622 if (expect_false (ev_is_active (w))) 2886 if (expect_false (ev_is_active (w)))
1623 return; 2887 return;
1624 2888
1625 ((WT)w)->at += mn_now; 2889 ev_at (w) += mn_now;
1626 2890
1627 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2891 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1628 2892
2893 EV_FREQUENT_CHECK;
2894
2895 ++timercnt;
1629 ev_start (EV_A_ (W)w, ++timercnt); 2896 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1630 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2897 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1631 timers [timercnt - 1] = w; 2898 ANHE_w (timers [ev_active (w)]) = (WT)w;
1632 upheap ((WT *)timers, timercnt - 1); 2899 ANHE_at_cache (timers [ev_active (w)]);
2900 upheap (timers, ev_active (w));
1633 2901
2902 EV_FREQUENT_CHECK;
2903
1634 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2904 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1635} 2905}
1636 2906
1637void 2907void noinline
1638ev_timer_stop (EV_P_ ev_timer *w) 2908ev_timer_stop (EV_P_ ev_timer *w)
1639{ 2909{
1640 clear_pending (EV_A_ (W)w); 2910 clear_pending (EV_A_ (W)w);
1641 if (expect_false (!ev_is_active (w))) 2911 if (expect_false (!ev_is_active (w)))
1642 return; 2912 return;
1643 2913
1644 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2914 EV_FREQUENT_CHECK;
1645 2915
1646 { 2916 {
1647 int active = ((W)w)->active; 2917 int active = ev_active (w);
1648 2918
2919 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2920
2921 --timercnt;
2922
1649 if (expect_true (--active < --timercnt)) 2923 if (expect_true (active < timercnt + HEAP0))
1650 { 2924 {
1651 timers [active] = timers [timercnt]; 2925 timers [active] = timers [timercnt + HEAP0];
1652 adjustheap ((WT *)timers, timercnt, active); 2926 adjustheap (timers, timercnt, active);
1653 } 2927 }
1654 } 2928 }
1655 2929
1656 ((WT)w)->at -= mn_now; 2930 ev_at (w) -= mn_now;
1657 2931
1658 ev_stop (EV_A_ (W)w); 2932 ev_stop (EV_A_ (W)w);
1659}
1660 2933
1661void 2934 EV_FREQUENT_CHECK;
2935}
2936
2937void noinline
1662ev_timer_again (EV_P_ ev_timer *w) 2938ev_timer_again (EV_P_ ev_timer *w)
1663{ 2939{
2940 EV_FREQUENT_CHECK;
2941
1664 if (ev_is_active (w)) 2942 if (ev_is_active (w))
1665 { 2943 {
1666 if (w->repeat) 2944 if (w->repeat)
1667 { 2945 {
1668 ((WT)w)->at = mn_now + w->repeat; 2946 ev_at (w) = mn_now + w->repeat;
2947 ANHE_at_cache (timers [ev_active (w)]);
1669 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2948 adjustheap (timers, timercnt, ev_active (w));
1670 } 2949 }
1671 else 2950 else
1672 ev_timer_stop (EV_A_ w); 2951 ev_timer_stop (EV_A_ w);
1673 } 2952 }
1674 else if (w->repeat) 2953 else if (w->repeat)
1675 { 2954 {
1676 w->at = w->repeat; 2955 ev_at (w) = w->repeat;
1677 ev_timer_start (EV_A_ w); 2956 ev_timer_start (EV_A_ w);
1678 } 2957 }
2958
2959 EV_FREQUENT_CHECK;
2960}
2961
2962ev_tstamp
2963ev_timer_remaining (EV_P_ ev_timer *w)
2964{
2965 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1679} 2966}
1680 2967
1681#if EV_PERIODIC_ENABLE 2968#if EV_PERIODIC_ENABLE
1682void 2969void noinline
1683ev_periodic_start (EV_P_ ev_periodic *w) 2970ev_periodic_start (EV_P_ ev_periodic *w)
1684{ 2971{
1685 if (expect_false (ev_is_active (w))) 2972 if (expect_false (ev_is_active (w)))
1686 return; 2973 return;
1687 2974
1688 if (w->reschedule_cb) 2975 if (w->reschedule_cb)
1689 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2976 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1690 else if (w->interval) 2977 else if (w->interval)
1691 { 2978 {
1692 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2979 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1693 /* this formula differs from the one in periodic_reify because we do not always round up */ 2980 periodic_recalc (EV_A_ w);
1694 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1695 } 2981 }
2982 else
2983 ev_at (w) = w->offset;
1696 2984
2985 EV_FREQUENT_CHECK;
2986
2987 ++periodiccnt;
1697 ev_start (EV_A_ (W)w, ++periodiccnt); 2988 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1698 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2989 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1699 periodics [periodiccnt - 1] = w; 2990 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1700 upheap ((WT *)periodics, periodiccnt - 1); 2991 ANHE_at_cache (periodics [ev_active (w)]);
2992 upheap (periodics, ev_active (w));
1701 2993
2994 EV_FREQUENT_CHECK;
2995
1702 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2996 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1703} 2997}
1704 2998
1705void 2999void noinline
1706ev_periodic_stop (EV_P_ ev_periodic *w) 3000ev_periodic_stop (EV_P_ ev_periodic *w)
1707{ 3001{
1708 clear_pending (EV_A_ (W)w); 3002 clear_pending (EV_A_ (W)w);
1709 if (expect_false (!ev_is_active (w))) 3003 if (expect_false (!ev_is_active (w)))
1710 return; 3004 return;
1711 3005
1712 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3006 EV_FREQUENT_CHECK;
1713 3007
1714 { 3008 {
1715 int active = ((W)w)->active; 3009 int active = ev_active (w);
1716 3010
3011 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3012
3013 --periodiccnt;
3014
1717 if (expect_true (--active < --periodiccnt)) 3015 if (expect_true (active < periodiccnt + HEAP0))
1718 { 3016 {
1719 periodics [active] = periodics [periodiccnt]; 3017 periodics [active] = periodics [periodiccnt + HEAP0];
1720 adjustheap ((WT *)periodics, periodiccnt, active); 3018 adjustheap (periodics, periodiccnt, active);
1721 } 3019 }
1722 } 3020 }
1723 3021
1724 ev_stop (EV_A_ (W)w); 3022 ev_stop (EV_A_ (W)w);
1725}
1726 3023
1727void 3024 EV_FREQUENT_CHECK;
3025}
3026
3027void noinline
1728ev_periodic_again (EV_P_ ev_periodic *w) 3028ev_periodic_again (EV_P_ ev_periodic *w)
1729{ 3029{
1730 /* TODO: use adjustheap and recalculation */ 3030 /* TODO: use adjustheap and recalculation */
1731 ev_periodic_stop (EV_A_ w); 3031 ev_periodic_stop (EV_A_ w);
1732 ev_periodic_start (EV_A_ w); 3032 ev_periodic_start (EV_A_ w);
… …
1735 3035
1736#ifndef SA_RESTART 3036#ifndef SA_RESTART
1737# define SA_RESTART 0 3037# define SA_RESTART 0
1738#endif 3038#endif
1739 3039
1740void 3040#if EV_SIGNAL_ENABLE
3041
3042void noinline
1741ev_signal_start (EV_P_ ev_signal *w) 3043ev_signal_start (EV_P_ ev_signal *w)
1742{ 3044{
1743#if EV_MULTIPLICITY
1744 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1745#endif
1746 if (expect_false (ev_is_active (w))) 3045 if (expect_false (ev_is_active (w)))
1747 return; 3046 return;
1748 3047
1749 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3048 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3049
3050#if EV_MULTIPLICITY
3051 assert (("libev: a signal must not be attached to two different loops",
3052 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3053
3054 signals [w->signum - 1].loop = EV_A;
3055#endif
3056
3057 EV_FREQUENT_CHECK;
3058
3059#if EV_USE_SIGNALFD
3060 if (sigfd == -2)
3061 {
3062 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3063 if (sigfd < 0 && errno == EINVAL)
3064 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3065
3066 if (sigfd >= 0)
3067 {
3068 fd_intern (sigfd); /* doing it twice will not hurt */
3069
3070 sigemptyset (&sigfd_set);
3071
3072 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3073 ev_set_priority (&sigfd_w, EV_MAXPRI);
3074 ev_io_start (EV_A_ &sigfd_w);
3075 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3076 }
3077 }
3078
3079 if (sigfd >= 0)
3080 {
3081 /* TODO: check .head */
3082 sigaddset (&sigfd_set, w->signum);
3083 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3084
3085 signalfd (sigfd, &sigfd_set, 0);
3086 }
3087#endif
1750 3088
1751 ev_start (EV_A_ (W)w, 1); 3089 ev_start (EV_A_ (W)w, 1);
1752 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1753 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 3090 wlist_add (&signals [w->signum - 1].head, (WL)w);
1754 3091
1755 if (!((WL)w)->next) 3092 if (!((WL)w)->next)
3093# if EV_USE_SIGNALFD
3094 if (sigfd < 0) /*TODO*/
3095# endif
1756 { 3096 {
1757#if _WIN32 3097# ifdef _WIN32
3098 evpipe_init (EV_A);
3099
1758 signal (w->signum, sighandler); 3100 signal (w->signum, ev_sighandler);
1759#else 3101# else
1760 struct sigaction sa; 3102 struct sigaction sa;
3103
3104 evpipe_init (EV_A);
3105
1761 sa.sa_handler = sighandler; 3106 sa.sa_handler = ev_sighandler;
1762 sigfillset (&sa.sa_mask); 3107 sigfillset (&sa.sa_mask);
1763 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3108 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1764 sigaction (w->signum, &sa, 0); 3109 sigaction (w->signum, &sa, 0);
3110
3111 if (origflags & EVFLAG_NOSIGMASK)
3112 {
3113 sigemptyset (&sa.sa_mask);
3114 sigaddset (&sa.sa_mask, w->signum);
3115 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3116 }
1765#endif 3117#endif
1766 } 3118 }
1767}
1768 3119
1769void 3120 EV_FREQUENT_CHECK;
3121}
3122
3123void noinline
1770ev_signal_stop (EV_P_ ev_signal *w) 3124ev_signal_stop (EV_P_ ev_signal *w)
1771{ 3125{
1772 clear_pending (EV_A_ (W)w); 3126 clear_pending (EV_A_ (W)w);
1773 if (expect_false (!ev_is_active (w))) 3127 if (expect_false (!ev_is_active (w)))
1774 return; 3128 return;
1775 3129
3130 EV_FREQUENT_CHECK;
3131
1776 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3132 wlist_del (&signals [w->signum - 1].head, (WL)w);
1777 ev_stop (EV_A_ (W)w); 3133 ev_stop (EV_A_ (W)w);
1778 3134
1779 if (!signals [w->signum - 1].head) 3135 if (!signals [w->signum - 1].head)
3136 {
3137#if EV_MULTIPLICITY
3138 signals [w->signum - 1].loop = 0; /* unattach from signal */
3139#endif
3140#if EV_USE_SIGNALFD
3141 if (sigfd >= 0)
3142 {
3143 sigset_t ss;
3144
3145 sigemptyset (&ss);
3146 sigaddset (&ss, w->signum);
3147 sigdelset (&sigfd_set, w->signum);
3148
3149 signalfd (sigfd, &sigfd_set, 0);
3150 sigprocmask (SIG_UNBLOCK, &ss, 0);
3151 }
3152 else
3153#endif
1780 signal (w->signum, SIG_DFL); 3154 signal (w->signum, SIG_DFL);
3155 }
3156
3157 EV_FREQUENT_CHECK;
1781} 3158}
3159
3160#endif
3161
3162#if EV_CHILD_ENABLE
1782 3163
1783void 3164void
1784ev_child_start (EV_P_ ev_child *w) 3165ev_child_start (EV_P_ ev_child *w)
1785{ 3166{
1786#if EV_MULTIPLICITY 3167#if EV_MULTIPLICITY
1787 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3168 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1788#endif 3169#endif
1789 if (expect_false (ev_is_active (w))) 3170 if (expect_false (ev_is_active (w)))
1790 return; 3171 return;
1791 3172
3173 EV_FREQUENT_CHECK;
3174
1792 ev_start (EV_A_ (W)w, 1); 3175 ev_start (EV_A_ (W)w, 1);
1793 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3176 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3177
3178 EV_FREQUENT_CHECK;
1794} 3179}
1795 3180
1796void 3181void
1797ev_child_stop (EV_P_ ev_child *w) 3182ev_child_stop (EV_P_ ev_child *w)
1798{ 3183{
1799 clear_pending (EV_A_ (W)w); 3184 clear_pending (EV_A_ (W)w);
1800 if (expect_false (!ev_is_active (w))) 3185 if (expect_false (!ev_is_active (w)))
1801 return; 3186 return;
1802 3187
3188 EV_FREQUENT_CHECK;
3189
1803 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3190 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1804 ev_stop (EV_A_ (W)w); 3191 ev_stop (EV_A_ (W)w);
3192
3193 EV_FREQUENT_CHECK;
1805} 3194}
3195
3196#endif
1806 3197
1807#if EV_STAT_ENABLE 3198#if EV_STAT_ENABLE
1808 3199
1809# ifdef _WIN32 3200# ifdef _WIN32
1810# undef lstat 3201# undef lstat
1811# define lstat(a,b) _stati64 (a,b) 3202# define lstat(a,b) _stati64 (a,b)
1812# endif 3203# endif
1813 3204
1814#define DEF_STAT_INTERVAL 5.0074891 3205#define DEF_STAT_INTERVAL 5.0074891
3206#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1815#define MIN_STAT_INTERVAL 0.1074891 3207#define MIN_STAT_INTERVAL 0.1074891
1816 3208
1817static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3209static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1818 3210
1819#if EV_USE_INOTIFY 3211#if EV_USE_INOTIFY
1820# define EV_INOTIFY_BUFSIZE 8192 3212
3213/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3214# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1821 3215
1822static void noinline 3216static void noinline
1823infy_add (EV_P_ ev_stat *w) 3217infy_add (EV_P_ ev_stat *w)
1824{ 3218{
1825 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); 3219 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);
1826 3220
1827 if (w->wd < 0) 3221 if (w->wd >= 0)
3222 {
3223 struct statfs sfs;
3224
3225 /* now local changes will be tracked by inotify, but remote changes won't */
3226 /* unless the filesystem is known to be local, we therefore still poll */
3227 /* also do poll on <2.6.25, but with normal frequency */
3228
3229 if (!fs_2625)
3230 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3231 else if (!statfs (w->path, &sfs)
3232 && (sfs.f_type == 0x1373 /* devfs */
3233 || sfs.f_type == 0xEF53 /* ext2/3 */
3234 || sfs.f_type == 0x3153464a /* jfs */
3235 || sfs.f_type == 0x52654973 /* reiser3 */
3236 || sfs.f_type == 0x01021994 /* tempfs */
3237 || sfs.f_type == 0x58465342 /* xfs */))
3238 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3239 else
3240 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1828 { 3241 }
1829 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3242 else
3243 {
3244 /* can't use inotify, continue to stat */
3245 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1830 3246
1831 /* monitor some parent directory for speedup hints */ 3247 /* if path is not there, monitor some parent directory for speedup hints */
3248 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3249 /* but an efficiency issue only */
1832 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3250 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1833 { 3251 {
1834 char path [4096]; 3252 char path [4096];
1835 strcpy (path, w->path); 3253 strcpy (path, w->path);
1836 3254
… …
1839 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3257 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1840 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3258 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1841 3259
1842 char *pend = strrchr (path, '/'); 3260 char *pend = strrchr (path, '/');
1843 3261
1844 if (!pend) 3262 if (!pend || pend == path)
1845 break; /* whoops, no '/', complain to your admin */ 3263 break;
1846 3264
1847 *pend = 0; 3265 *pend = 0;
1848 w->wd = inotify_add_watch (fs_fd, path, mask); 3266 w->wd = inotify_add_watch (fs_fd, path, mask);
1849 } 3267 }
1850 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3268 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1851 } 3269 }
1852 } 3270 }
1853 else
1854 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1855 3271
1856 if (w->wd >= 0) 3272 if (w->wd >= 0)
1857 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3273 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3274
3275 /* now re-arm timer, if required */
3276 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3277 ev_timer_again (EV_A_ &w->timer);
3278 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1858} 3279}
1859 3280
1860static void noinline 3281static void noinline
1861infy_del (EV_P_ ev_stat *w) 3282infy_del (EV_P_ ev_stat *w)
1862{ 3283{
… …
1865 3286
1866 if (wd < 0) 3287 if (wd < 0)
1867 return; 3288 return;
1868 3289
1869 w->wd = -2; 3290 w->wd = -2;
1870 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3291 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1871 wlist_del (&fs_hash [slot].head, (WL)w); 3292 wlist_del (&fs_hash [slot].head, (WL)w);
1872 3293
1873 /* remove this watcher, if others are watching it, they will rearm */ 3294 /* remove this watcher, if others are watching it, they will rearm */
1874 inotify_rm_watch (fs_fd, wd); 3295 inotify_rm_watch (fs_fd, wd);
1875} 3296}
1876 3297
1877static void noinline 3298static void noinline
1878infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3299infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1879{ 3300{
1880 if (slot < 0) 3301 if (slot < 0)
1881 /* overflow, need to check for all hahs slots */ 3302 /* overflow, need to check for all hash slots */
1882 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3303 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1883 infy_wd (EV_A_ slot, wd, ev); 3304 infy_wd (EV_A_ slot, wd, ev);
1884 else 3305 else
1885 { 3306 {
1886 WL w_; 3307 WL w_;
1887 3308
1888 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3309 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1889 { 3310 {
1890 ev_stat *w = (ev_stat *)w_; 3311 ev_stat *w = (ev_stat *)w_;
1891 w_ = w_->next; /* lets us remove this watcher and all before it */ 3312 w_ = w_->next; /* lets us remove this watcher and all before it */
1892 3313
1893 if (w->wd == wd || wd == -1) 3314 if (w->wd == wd || wd == -1)
1894 { 3315 {
1895 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3316 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1896 { 3317 {
3318 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1897 w->wd = -1; 3319 w->wd = -1;
1898 infy_add (EV_A_ w); /* re-add, no matter what */ 3320 infy_add (EV_A_ w); /* re-add, no matter what */
1899 } 3321 }
1900 3322
1901 stat_timer_cb (EV_A_ &w->timer, 0); 3323 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1906 3328
1907static void 3329static void
1908infy_cb (EV_P_ ev_io *w, int revents) 3330infy_cb (EV_P_ ev_io *w, int revents)
1909{ 3331{
1910 char buf [EV_INOTIFY_BUFSIZE]; 3332 char buf [EV_INOTIFY_BUFSIZE];
1911 struct inotify_event *ev = (struct inotify_event *)buf;
1912 int ofs; 3333 int ofs;
1913 int len = read (fs_fd, buf, sizeof (buf)); 3334 int len = read (fs_fd, buf, sizeof (buf));
1914 3335
1915 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3336 for (ofs = 0; ofs < len; )
3337 {
3338 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1916 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3339 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3340 ofs += sizeof (struct inotify_event) + ev->len;
3341 }
1917} 3342}
1918 3343
1919void inline_size 3344inline_size void ecb_cold
3345ev_check_2625 (EV_P)
3346{
3347 /* kernels < 2.6.25 are borked
3348 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3349 */
3350 if (ev_linux_version () < 0x020619)
3351 return;
3352
3353 fs_2625 = 1;
3354}
3355
3356inline_size int
3357infy_newfd (void)
3358{
3359#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3360 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3361 if (fd >= 0)
3362 return fd;
3363#endif
3364 return inotify_init ();
3365}
3366
3367inline_size void
1920infy_init (EV_P) 3368infy_init (EV_P)
1921{ 3369{
1922 if (fs_fd != -2) 3370 if (fs_fd != -2)
1923 return; 3371 return;
1924 3372
3373 fs_fd = -1;
3374
3375 ev_check_2625 (EV_A);
3376
1925 fs_fd = inotify_init (); 3377 fs_fd = infy_newfd ();
1926 3378
1927 if (fs_fd >= 0) 3379 if (fs_fd >= 0)
1928 { 3380 {
3381 fd_intern (fs_fd);
1929 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3382 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1930 ev_set_priority (&fs_w, EV_MAXPRI); 3383 ev_set_priority (&fs_w, EV_MAXPRI);
1931 ev_io_start (EV_A_ &fs_w); 3384 ev_io_start (EV_A_ &fs_w);
3385 ev_unref (EV_A);
1932 } 3386 }
1933} 3387}
1934 3388
1935void inline_size 3389inline_size void
1936infy_fork (EV_P) 3390infy_fork (EV_P)
1937{ 3391{
1938 int slot; 3392 int slot;
1939 3393
1940 if (fs_fd < 0) 3394 if (fs_fd < 0)
1941 return; 3395 return;
1942 3396
3397 ev_ref (EV_A);
3398 ev_io_stop (EV_A_ &fs_w);
1943 close (fs_fd); 3399 close (fs_fd);
1944 fs_fd = inotify_init (); 3400 fs_fd = infy_newfd ();
1945 3401
3402 if (fs_fd >= 0)
3403 {
3404 fd_intern (fs_fd);
3405 ev_io_set (&fs_w, fs_fd, EV_READ);
3406 ev_io_start (EV_A_ &fs_w);
3407 ev_unref (EV_A);
3408 }
3409
1946 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3410 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1947 { 3411 {
1948 WL w_ = fs_hash [slot].head; 3412 WL w_ = fs_hash [slot].head;
1949 fs_hash [slot].head = 0; 3413 fs_hash [slot].head = 0;
1950 3414
1951 while (w_) 3415 while (w_)
… …
1956 w->wd = -1; 3420 w->wd = -1;
1957 3421
1958 if (fs_fd >= 0) 3422 if (fs_fd >= 0)
1959 infy_add (EV_A_ w); /* re-add, no matter what */ 3423 infy_add (EV_A_ w); /* re-add, no matter what */
1960 else 3424 else
3425 {
3426 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3427 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1961 ev_timer_start (EV_A_ &w->timer); 3428 ev_timer_again (EV_A_ &w->timer);
3429 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3430 }
1962 } 3431 }
1963
1964 } 3432 }
1965} 3433}
1966 3434
3435#endif
3436
3437#ifdef _WIN32
3438# define EV_LSTAT(p,b) _stati64 (p, b)
3439#else
3440# define EV_LSTAT(p,b) lstat (p, b)
1967#endif 3441#endif
1968 3442
1969void 3443void
1970ev_stat_stat (EV_P_ ev_stat *w) 3444ev_stat_stat (EV_P_ ev_stat *w)
1971{ 3445{
… …
1978static void noinline 3452static void noinline
1979stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3453stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1980{ 3454{
1981 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3455 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1982 3456
1983 /* we copy this here each the time so that */ 3457 ev_statdata prev = w->attr;
1984 /* prev has the old value when the callback gets invoked */
1985 w->prev = w->attr;
1986 ev_stat_stat (EV_A_ w); 3458 ev_stat_stat (EV_A_ w);
1987 3459
1988 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3460 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1989 if ( 3461 if (
1990 w->prev.st_dev != w->attr.st_dev 3462 prev.st_dev != w->attr.st_dev
1991 || w->prev.st_ino != w->attr.st_ino 3463 || prev.st_ino != w->attr.st_ino
1992 || w->prev.st_mode != w->attr.st_mode 3464 || prev.st_mode != w->attr.st_mode
1993 || w->prev.st_nlink != w->attr.st_nlink 3465 || prev.st_nlink != w->attr.st_nlink
1994 || w->prev.st_uid != w->attr.st_uid 3466 || prev.st_uid != w->attr.st_uid
1995 || w->prev.st_gid != w->attr.st_gid 3467 || prev.st_gid != w->attr.st_gid
1996 || w->prev.st_rdev != w->attr.st_rdev 3468 || prev.st_rdev != w->attr.st_rdev
1997 || w->prev.st_size != w->attr.st_size 3469 || prev.st_size != w->attr.st_size
1998 || w->prev.st_atime != w->attr.st_atime 3470 || prev.st_atime != w->attr.st_atime
1999 || w->prev.st_mtime != w->attr.st_mtime 3471 || prev.st_mtime != w->attr.st_mtime
2000 || w->prev.st_ctime != w->attr.st_ctime 3472 || prev.st_ctime != w->attr.st_ctime
2001 ) { 3473 ) {
3474 /* we only update w->prev on actual differences */
3475 /* in case we test more often than invoke the callback, */
3476 /* to ensure that prev is always different to attr */
3477 w->prev = prev;
3478
2002 #if EV_USE_INOTIFY 3479 #if EV_USE_INOTIFY
3480 if (fs_fd >= 0)
3481 {
2003 infy_del (EV_A_ w); 3482 infy_del (EV_A_ w);
2004 infy_add (EV_A_ w); 3483 infy_add (EV_A_ w);
2005 ev_stat_stat (EV_A_ w); /* avoid race... */ 3484 ev_stat_stat (EV_A_ w); /* avoid race... */
3485 }
2006 #endif 3486 #endif
2007 3487
2008 ev_feed_event (EV_A_ w, EV_STAT); 3488 ev_feed_event (EV_A_ w, EV_STAT);
2009 } 3489 }
2010} 3490}
… …
2013ev_stat_start (EV_P_ ev_stat *w) 3493ev_stat_start (EV_P_ ev_stat *w)
2014{ 3494{
2015 if (expect_false (ev_is_active (w))) 3495 if (expect_false (ev_is_active (w)))
2016 return; 3496 return;
2017 3497
2018 /* since we use memcmp, we need to clear any padding data etc. */
2019 memset (&w->prev, 0, sizeof (ev_statdata));
2020 memset (&w->attr, 0, sizeof (ev_statdata));
2021
2022 ev_stat_stat (EV_A_ w); 3498 ev_stat_stat (EV_A_ w);
2023 3499
3500 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2024 if (w->interval < MIN_STAT_INTERVAL) 3501 w->interval = MIN_STAT_INTERVAL;
2025 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2026 3502
2027 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3503 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2028 ev_set_priority (&w->timer, ev_priority (w)); 3504 ev_set_priority (&w->timer, ev_priority (w));
2029 3505
2030#if EV_USE_INOTIFY 3506#if EV_USE_INOTIFY
2031 infy_init (EV_A); 3507 infy_init (EV_A);
2032 3508
2033 if (fs_fd >= 0) 3509 if (fs_fd >= 0)
2034 infy_add (EV_A_ w); 3510 infy_add (EV_A_ w);
2035 else 3511 else
2036#endif 3512#endif
3513 {
2037 ev_timer_start (EV_A_ &w->timer); 3514 ev_timer_again (EV_A_ &w->timer);
3515 ev_unref (EV_A);
3516 }
2038 3517
2039 ev_start (EV_A_ (W)w, 1); 3518 ev_start (EV_A_ (W)w, 1);
3519
3520 EV_FREQUENT_CHECK;
2040} 3521}
2041 3522
2042void 3523void
2043ev_stat_stop (EV_P_ ev_stat *w) 3524ev_stat_stop (EV_P_ ev_stat *w)
2044{ 3525{
2045 clear_pending (EV_A_ (W)w); 3526 clear_pending (EV_A_ (W)w);
2046 if (expect_false (!ev_is_active (w))) 3527 if (expect_false (!ev_is_active (w)))
2047 return; 3528 return;
2048 3529
3530 EV_FREQUENT_CHECK;
3531
2049#if EV_USE_INOTIFY 3532#if EV_USE_INOTIFY
2050 infy_del (EV_A_ w); 3533 infy_del (EV_A_ w);
2051#endif 3534#endif
3535
3536 if (ev_is_active (&w->timer))
3537 {
3538 ev_ref (EV_A);
2052 ev_timer_stop (EV_A_ &w->timer); 3539 ev_timer_stop (EV_A_ &w->timer);
3540 }
2053 3541
2054 ev_stop (EV_A_ (W)w); 3542 ev_stop (EV_A_ (W)w);
3543
3544 EV_FREQUENT_CHECK;
2055} 3545}
2056#endif 3546#endif
2057 3547
2058#if EV_IDLE_ENABLE 3548#if EV_IDLE_ENABLE
2059void 3549void
… …
2062 if (expect_false (ev_is_active (w))) 3552 if (expect_false (ev_is_active (w)))
2063 return; 3553 return;
2064 3554
2065 pri_adjust (EV_A_ (W)w); 3555 pri_adjust (EV_A_ (W)w);
2066 3556
3557 EV_FREQUENT_CHECK;
3558
2067 { 3559 {
2068 int active = ++idlecnt [ABSPRI (w)]; 3560 int active = ++idlecnt [ABSPRI (w)];
2069 3561
2070 ++idleall; 3562 ++idleall;
2071 ev_start (EV_A_ (W)w, active); 3563 ev_start (EV_A_ (W)w, active);
2072 3564
2073 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3565 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2074 idles [ABSPRI (w)][active - 1] = w; 3566 idles [ABSPRI (w)][active - 1] = w;
2075 } 3567 }
3568
3569 EV_FREQUENT_CHECK;
2076} 3570}
2077 3571
2078void 3572void
2079ev_idle_stop (EV_P_ ev_idle *w) 3573ev_idle_stop (EV_P_ ev_idle *w)
2080{ 3574{
2081 clear_pending (EV_A_ (W)w); 3575 clear_pending (EV_A_ (W)w);
2082 if (expect_false (!ev_is_active (w))) 3576 if (expect_false (!ev_is_active (w)))
2083 return; 3577 return;
2084 3578
3579 EV_FREQUENT_CHECK;
3580
2085 { 3581 {
2086 int active = ((W)w)->active; 3582 int active = ev_active (w);
2087 3583
2088 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3584 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2089 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3585 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2090 3586
2091 ev_stop (EV_A_ (W)w); 3587 ev_stop (EV_A_ (W)w);
2092 --idleall; 3588 --idleall;
2093 } 3589 }
2094}
2095#endif
2096 3590
3591 EV_FREQUENT_CHECK;
3592}
3593#endif
3594
3595#if EV_PREPARE_ENABLE
2097void 3596void
2098ev_prepare_start (EV_P_ ev_prepare *w) 3597ev_prepare_start (EV_P_ ev_prepare *w)
2099{ 3598{
2100 if (expect_false (ev_is_active (w))) 3599 if (expect_false (ev_is_active (w)))
2101 return; 3600 return;
3601
3602 EV_FREQUENT_CHECK;
2102 3603
2103 ev_start (EV_A_ (W)w, ++preparecnt); 3604 ev_start (EV_A_ (W)w, ++preparecnt);
2104 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3605 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2105 prepares [preparecnt - 1] = w; 3606 prepares [preparecnt - 1] = w;
3607
3608 EV_FREQUENT_CHECK;
2106} 3609}
2107 3610
2108void 3611void
2109ev_prepare_stop (EV_P_ ev_prepare *w) 3612ev_prepare_stop (EV_P_ ev_prepare *w)
2110{ 3613{
2111 clear_pending (EV_A_ (W)w); 3614 clear_pending (EV_A_ (W)w);
2112 if (expect_false (!ev_is_active (w))) 3615 if (expect_false (!ev_is_active (w)))
2113 return; 3616 return;
2114 3617
3618 EV_FREQUENT_CHECK;
3619
2115 { 3620 {
2116 int active = ((W)w)->active; 3621 int active = ev_active (w);
3622
2117 prepares [active - 1] = prepares [--preparecnt]; 3623 prepares [active - 1] = prepares [--preparecnt];
2118 ((W)prepares [active - 1])->active = active; 3624 ev_active (prepares [active - 1]) = active;
2119 } 3625 }
2120 3626
2121 ev_stop (EV_A_ (W)w); 3627 ev_stop (EV_A_ (W)w);
2122}
2123 3628
3629 EV_FREQUENT_CHECK;
3630}
3631#endif
3632
3633#if EV_CHECK_ENABLE
2124void 3634void
2125ev_check_start (EV_P_ ev_check *w) 3635ev_check_start (EV_P_ ev_check *w)
2126{ 3636{
2127 if (expect_false (ev_is_active (w))) 3637 if (expect_false (ev_is_active (w)))
2128 return; 3638 return;
3639
3640 EV_FREQUENT_CHECK;
2129 3641
2130 ev_start (EV_A_ (W)w, ++checkcnt); 3642 ev_start (EV_A_ (W)w, ++checkcnt);
2131 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3643 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2132 checks [checkcnt - 1] = w; 3644 checks [checkcnt - 1] = w;
3645
3646 EV_FREQUENT_CHECK;
2133} 3647}
2134 3648
2135void 3649void
2136ev_check_stop (EV_P_ ev_check *w) 3650ev_check_stop (EV_P_ ev_check *w)
2137{ 3651{
2138 clear_pending (EV_A_ (W)w); 3652 clear_pending (EV_A_ (W)w);
2139 if (expect_false (!ev_is_active (w))) 3653 if (expect_false (!ev_is_active (w)))
2140 return; 3654 return;
2141 3655
3656 EV_FREQUENT_CHECK;
3657
2142 { 3658 {
2143 int active = ((W)w)->active; 3659 int active = ev_active (w);
3660
2144 checks [active - 1] = checks [--checkcnt]; 3661 checks [active - 1] = checks [--checkcnt];
2145 ((W)checks [active - 1])->active = active; 3662 ev_active (checks [active - 1]) = active;
2146 } 3663 }
2147 3664
2148 ev_stop (EV_A_ (W)w); 3665 ev_stop (EV_A_ (W)w);
3666
3667 EV_FREQUENT_CHECK;
2149} 3668}
3669#endif
2150 3670
2151#if EV_EMBED_ENABLE 3671#if EV_EMBED_ENABLE
2152void noinline 3672void noinline
2153ev_embed_sweep (EV_P_ ev_embed *w) 3673ev_embed_sweep (EV_P_ ev_embed *w)
2154{ 3674{
2155 ev_loop (w->loop, EVLOOP_NONBLOCK); 3675 ev_run (w->other, EVRUN_NOWAIT);
2156} 3676}
2157 3677
2158static void 3678static void
2159embed_cb (EV_P_ ev_io *io, int revents) 3679embed_io_cb (EV_P_ ev_io *io, int revents)
2160{ 3680{
2161 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3681 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2162 3682
2163 if (ev_cb (w)) 3683 if (ev_cb (w))
2164 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3684 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2165 else 3685 else
2166 ev_embed_sweep (loop, w); 3686 ev_run (w->other, EVRUN_NOWAIT);
2167} 3687}
3688
3689static void
3690embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3691{
3692 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3693
3694 {
3695 EV_P = w->other;
3696
3697 while (fdchangecnt)
3698 {
3699 fd_reify (EV_A);
3700 ev_run (EV_A_ EVRUN_NOWAIT);
3701 }
3702 }
3703}
3704
3705static void
3706embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3707{
3708 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3709
3710 ev_embed_stop (EV_A_ w);
3711
3712 {
3713 EV_P = w->other;
3714
3715 ev_loop_fork (EV_A);
3716 ev_run (EV_A_ EVRUN_NOWAIT);
3717 }
3718
3719 ev_embed_start (EV_A_ w);
3720}
3721
3722#if 0
3723static void
3724embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3725{
3726 ev_idle_stop (EV_A_ idle);
3727}
3728#endif
2168 3729
2169void 3730void
2170ev_embed_start (EV_P_ ev_embed *w) 3731ev_embed_start (EV_P_ ev_embed *w)
2171{ 3732{
2172 if (expect_false (ev_is_active (w))) 3733 if (expect_false (ev_is_active (w)))
2173 return; 3734 return;
2174 3735
2175 { 3736 {
2176 struct ev_loop *loop = w->loop; 3737 EV_P = w->other;
2177 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3738 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2178 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3739 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2179 } 3740 }
3741
3742 EV_FREQUENT_CHECK;
2180 3743
2181 ev_set_priority (&w->io, ev_priority (w)); 3744 ev_set_priority (&w->io, ev_priority (w));
2182 ev_io_start (EV_A_ &w->io); 3745 ev_io_start (EV_A_ &w->io);
2183 3746
3747 ev_prepare_init (&w->prepare, embed_prepare_cb);
3748 ev_set_priority (&w->prepare, EV_MINPRI);
3749 ev_prepare_start (EV_A_ &w->prepare);
3750
3751 ev_fork_init (&w->fork, embed_fork_cb);
3752 ev_fork_start (EV_A_ &w->fork);
3753
3754 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3755
2184 ev_start (EV_A_ (W)w, 1); 3756 ev_start (EV_A_ (W)w, 1);
3757
3758 EV_FREQUENT_CHECK;
2185} 3759}
2186 3760
2187void 3761void
2188ev_embed_stop (EV_P_ ev_embed *w) 3762ev_embed_stop (EV_P_ ev_embed *w)
2189{ 3763{
2190 clear_pending (EV_A_ (W)w); 3764 clear_pending (EV_A_ (W)w);
2191 if (expect_false (!ev_is_active (w))) 3765 if (expect_false (!ev_is_active (w)))
2192 return; 3766 return;
2193 3767
3768 EV_FREQUENT_CHECK;
3769
2194 ev_io_stop (EV_A_ &w->io); 3770 ev_io_stop (EV_A_ &w->io);
3771 ev_prepare_stop (EV_A_ &w->prepare);
3772 ev_fork_stop (EV_A_ &w->fork);
2195 3773
2196 ev_stop (EV_A_ (W)w); 3774 ev_stop (EV_A_ (W)w);
3775
3776 EV_FREQUENT_CHECK;
2197} 3777}
2198#endif 3778#endif
2199 3779
2200#if EV_FORK_ENABLE 3780#if EV_FORK_ENABLE
2201void 3781void
2202ev_fork_start (EV_P_ ev_fork *w) 3782ev_fork_start (EV_P_ ev_fork *w)
2203{ 3783{
2204 if (expect_false (ev_is_active (w))) 3784 if (expect_false (ev_is_active (w)))
2205 return; 3785 return;
2206 3786
3787 EV_FREQUENT_CHECK;
3788
2207 ev_start (EV_A_ (W)w, ++forkcnt); 3789 ev_start (EV_A_ (W)w, ++forkcnt);
2208 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3790 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2209 forks [forkcnt - 1] = w; 3791 forks [forkcnt - 1] = w;
3792
3793 EV_FREQUENT_CHECK;
2210} 3794}
2211 3795
2212void 3796void
2213ev_fork_stop (EV_P_ ev_fork *w) 3797ev_fork_stop (EV_P_ ev_fork *w)
2214{ 3798{
2215 clear_pending (EV_A_ (W)w); 3799 clear_pending (EV_A_ (W)w);
2216 if (expect_false (!ev_is_active (w))) 3800 if (expect_false (!ev_is_active (w)))
2217 return; 3801 return;
2218 3802
3803 EV_FREQUENT_CHECK;
3804
2219 { 3805 {
2220 int active = ((W)w)->active; 3806 int active = ev_active (w);
3807
2221 forks [active - 1] = forks [--forkcnt]; 3808 forks [active - 1] = forks [--forkcnt];
2222 ((W)forks [active - 1])->active = active; 3809 ev_active (forks [active - 1]) = active;
2223 } 3810 }
2224 3811
2225 ev_stop (EV_A_ (W)w); 3812 ev_stop (EV_A_ (W)w);
3813
3814 EV_FREQUENT_CHECK;
3815}
3816#endif
3817
3818#if EV_CLEANUP_ENABLE
3819void
3820ev_cleanup_start (EV_P_ ev_cleanup *w)
3821{
3822 if (expect_false (ev_is_active (w)))
3823 return;
3824
3825 EV_FREQUENT_CHECK;
3826
3827 ev_start (EV_A_ (W)w, ++cleanupcnt);
3828 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3829 cleanups [cleanupcnt - 1] = w;
3830
3831 /* cleanup watchers should never keep a refcount on the loop */
3832 ev_unref (EV_A);
3833 EV_FREQUENT_CHECK;
3834}
3835
3836void
3837ev_cleanup_stop (EV_P_ ev_cleanup *w)
3838{
3839 clear_pending (EV_A_ (W)w);
3840 if (expect_false (!ev_is_active (w)))
3841 return;
3842
3843 EV_FREQUENT_CHECK;
3844 ev_ref (EV_A);
3845
3846 {
3847 int active = ev_active (w);
3848
3849 cleanups [active - 1] = cleanups [--cleanupcnt];
3850 ev_active (cleanups [active - 1]) = active;
3851 }
3852
3853 ev_stop (EV_A_ (W)w);
3854
3855 EV_FREQUENT_CHECK;
3856}
3857#endif
3858
3859#if EV_ASYNC_ENABLE
3860void
3861ev_async_start (EV_P_ ev_async *w)
3862{
3863 if (expect_false (ev_is_active (w)))
3864 return;
3865
3866 w->sent = 0;
3867
3868 evpipe_init (EV_A);
3869
3870 EV_FREQUENT_CHECK;
3871
3872 ev_start (EV_A_ (W)w, ++asynccnt);
3873 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3874 asyncs [asynccnt - 1] = w;
3875
3876 EV_FREQUENT_CHECK;
3877}
3878
3879void
3880ev_async_stop (EV_P_ ev_async *w)
3881{
3882 clear_pending (EV_A_ (W)w);
3883 if (expect_false (!ev_is_active (w)))
3884 return;
3885
3886 EV_FREQUENT_CHECK;
3887
3888 {
3889 int active = ev_active (w);
3890
3891 asyncs [active - 1] = asyncs [--asynccnt];
3892 ev_active (asyncs [active - 1]) = active;
3893 }
3894
3895 ev_stop (EV_A_ (W)w);
3896
3897 EV_FREQUENT_CHECK;
3898}
3899
3900void
3901ev_async_send (EV_P_ ev_async *w)
3902{
3903 w->sent = 1;
3904 evpipe_write (EV_A_ &async_pending);
2226} 3905}
2227#endif 3906#endif
2228 3907
2229/*****************************************************************************/ 3908/*****************************************************************************/
2230 3909
… …
2240once_cb (EV_P_ struct ev_once *once, int revents) 3919once_cb (EV_P_ struct ev_once *once, int revents)
2241{ 3920{
2242 void (*cb)(int revents, void *arg) = once->cb; 3921 void (*cb)(int revents, void *arg) = once->cb;
2243 void *arg = once->arg; 3922 void *arg = once->arg;
2244 3923
2245 ev_io_stop (EV_A_ &once->io); 3924 ev_io_stop (EV_A_ &once->io);
2246 ev_timer_stop (EV_A_ &once->to); 3925 ev_timer_stop (EV_A_ &once->to);
2247 ev_free (once); 3926 ev_free (once);
2248 3927
2249 cb (revents, arg); 3928 cb (revents, arg);
2250} 3929}
2251 3930
2252static void 3931static void
2253once_cb_io (EV_P_ ev_io *w, int revents) 3932once_cb_io (EV_P_ ev_io *w, int revents)
2254{ 3933{
2255 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3934 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3935
3936 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2256} 3937}
2257 3938
2258static void 3939static void
2259once_cb_to (EV_P_ ev_timer *w, int revents) 3940once_cb_to (EV_P_ ev_timer *w, int revents)
2260{ 3941{
2261 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3942 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3943
3944 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2262} 3945}
2263 3946
2264void 3947void
2265ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3948ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2266{ 3949{
2267 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3950 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2268 3951
2269 if (expect_false (!once)) 3952 if (expect_false (!once))
2270 { 3953 {
2271 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3954 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2272 return; 3955 return;
2273 } 3956 }
2274 3957
2275 once->cb = cb; 3958 once->cb = cb;
2276 once->arg = arg; 3959 once->arg = arg;
… …
2288 ev_timer_set (&once->to, timeout, 0.); 3971 ev_timer_set (&once->to, timeout, 0.);
2289 ev_timer_start (EV_A_ &once->to); 3972 ev_timer_start (EV_A_ &once->to);
2290 } 3973 }
2291} 3974}
2292 3975
2293#ifdef __cplusplus 3976/*****************************************************************************/
2294} 3977
3978#if EV_WALK_ENABLE
3979void ecb_cold
3980ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3981{
3982 int i, j;
3983 ev_watcher_list *wl, *wn;
3984
3985 if (types & (EV_IO | EV_EMBED))
3986 for (i = 0; i < anfdmax; ++i)
3987 for (wl = anfds [i].head; wl; )
3988 {
3989 wn = wl->next;
3990
3991#if EV_EMBED_ENABLE
3992 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3993 {
3994 if (types & EV_EMBED)
3995 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3996 }
3997 else
3998#endif
3999#if EV_USE_INOTIFY
4000 if (ev_cb ((ev_io *)wl) == infy_cb)
4001 ;
4002 else
4003#endif
4004 if ((ev_io *)wl != &pipe_w)
4005 if (types & EV_IO)
4006 cb (EV_A_ EV_IO, wl);
4007
4008 wl = wn;
4009 }
4010
4011 if (types & (EV_TIMER | EV_STAT))
4012 for (i = timercnt + HEAP0; i-- > HEAP0; )
4013#if EV_STAT_ENABLE
4014 /*TODO: timer is not always active*/
4015 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4016 {
4017 if (types & EV_STAT)
4018 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4019 }
4020 else
4021#endif
4022 if (types & EV_TIMER)
4023 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4024
4025#if EV_PERIODIC_ENABLE
4026 if (types & EV_PERIODIC)
4027 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4028 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4029#endif
4030
4031#if EV_IDLE_ENABLE
4032 if (types & EV_IDLE)
4033 for (j = NUMPRI; i--; )
4034 for (i = idlecnt [j]; i--; )
4035 cb (EV_A_ EV_IDLE, idles [j][i]);
4036#endif
4037
4038#if EV_FORK_ENABLE
4039 if (types & EV_FORK)
4040 for (i = forkcnt; i--; )
4041 if (ev_cb (forks [i]) != embed_fork_cb)
4042 cb (EV_A_ EV_FORK, forks [i]);
4043#endif
4044
4045#if EV_ASYNC_ENABLE
4046 if (types & EV_ASYNC)
4047 for (i = asynccnt; i--; )
4048 cb (EV_A_ EV_ASYNC, asyncs [i]);
4049#endif
4050
4051#if EV_PREPARE_ENABLE
4052 if (types & EV_PREPARE)
4053 for (i = preparecnt; i--; )
4054# if EV_EMBED_ENABLE
4055 if (ev_cb (prepares [i]) != embed_prepare_cb)
2295#endif 4056# endif
4057 cb (EV_A_ EV_PREPARE, prepares [i]);
4058#endif
2296 4059
4060#if EV_CHECK_ENABLE
4061 if (types & EV_CHECK)
4062 for (i = checkcnt; i--; )
4063 cb (EV_A_ EV_CHECK, checks [i]);
4064#endif
4065
4066#if EV_SIGNAL_ENABLE
4067 if (types & EV_SIGNAL)
4068 for (i = 0; i < EV_NSIG - 1; ++i)
4069 for (wl = signals [i].head; wl; )
4070 {
4071 wn = wl->next;
4072 cb (EV_A_ EV_SIGNAL, wl);
4073 wl = wn;
4074 }
4075#endif
4076
4077#if EV_CHILD_ENABLE
4078 if (types & EV_CHILD)
4079 for (i = (EV_PID_HASHSIZE); i--; )
4080 for (wl = childs [i]; wl; )
4081 {
4082 wn = wl->next;
4083 cb (EV_A_ EV_CHILD, wl);
4084 wl = wn;
4085 }
4086#endif
4087/* EV_STAT 0x00001000 /* stat data changed */
4088/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4089}
4090#endif
4091
4092#if EV_MULTIPLICITY
4093 #include "ev_wrap.h"
4094#endif
4095
4096EV_CPP(})
4097

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