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Comparing libev/ev.c (file contents):
Revision 1.196 by root, Sat Dec 22 12:43:28 2007 UTC vs.
Revision 1.386 by root, Wed Jul 20 01:04:20 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_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_NANOSLEEP
61# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
62# else 88# else
89# undef EV_USE_NANOSLEEP
63# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
64# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
65# endif 100# endif
66 101
102# if HAVE_POLL && HAVE_POLL_H
67# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
68# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
69# define EV_USE_SELECT 1
70# else
71# define EV_USE_SELECT 0
72# endif 105# endif
73# endif
74
75# ifndef EV_USE_POLL
76# if HAVE_POLL && HAVE_POLL_H
77# define EV_USE_POLL 1
78# else 106# else
107# undef EV_USE_POLL
79# define EV_USE_POLL 0 108# define EV_USE_POLL 0
80# endif
81# endif 109# endif
82 110
83# ifndef EV_USE_EPOLL
84# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
85# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
86# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
87# define EV_USE_EPOLL 0
88# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
89# endif 118# endif
90 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
91# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
92# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
93# define EV_USE_KQUEUE 1
94# else
95# define EV_USE_KQUEUE 0
96# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
97# endif 127# endif
98 128
99# ifndef EV_USE_PORT
100# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
101# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
102# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
103# define EV_USE_PORT 0
104# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
105# endif 136# endif
106 137
107# ifndef EV_USE_INOTIFY
108# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
109# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
110# else
111# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
112# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
113# endif 145# endif
114 146
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
115#endif 154# endif
116 155
117#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
118#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
119#include <fcntl.h> 169#include <fcntl.h>
120#include <stddef.h> 170#include <stddef.h>
121 171
122#include <stdio.h> 172#include <stdio.h>
123 173
124#include <assert.h> 174#include <assert.h>
125#include <errno.h> 175#include <errno.h>
126#include <sys/types.h> 176#include <sys/types.h>
127#include <time.h> 177#include <time.h>
178#include <limits.h>
128 179
129#include <signal.h> 180#include <signal.h>
130 181
131#ifdef EV_H 182#ifdef EV_H
132# include EV_H 183# include EV_H
133#else 184#else
134# include "ev.h" 185# include "ev.h"
135#endif 186#endif
187
188EV_CPP(extern "C" {)
136 189
137#ifndef _WIN32 190#ifndef _WIN32
138# include <sys/time.h> 191# include <sys/time.h>
139# include <sys/wait.h> 192# include <sys/wait.h>
140# include <unistd.h> 193# include <unistd.h>
141#else 194#else
195# include <io.h>
142# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
143# include <windows.h> 197# include <windows.h>
144# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
145# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
146# 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
147#endif 251# endif
148 252#endif
149/**/
150 253
151#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
152# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
259# endif
153#endif 260#endif
154 261
155#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
156# define EV_USE_REALTIME 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
157#endif 264#endif
158 265
159#ifndef EV_USE_NANOSLEEP 266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
160# define EV_USE_NANOSLEEP 0 270# define EV_USE_NANOSLEEP 0
271# endif
161#endif 272#endif
162 273
163#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
164# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
165#endif 276#endif
166 277
167#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
168# ifdef _WIN32 279# ifdef _WIN32
169# define EV_USE_POLL 0 280# define EV_USE_POLL 0
170# else 281# else
171# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
172# endif 283# endif
173#endif 284#endif
174 285
175#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
176# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
291# endif
177#endif 292#endif
178 293
179#ifndef EV_USE_KQUEUE 294#ifndef EV_USE_KQUEUE
180# define EV_USE_KQUEUE 0 295# define EV_USE_KQUEUE 0
181#endif 296#endif
… …
183#ifndef EV_USE_PORT 298#ifndef EV_USE_PORT
184# define EV_USE_PORT 0 299# define EV_USE_PORT 0
185#endif 300#endif
186 301
187#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
188# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
307# endif
189#endif 308#endif
190 309
191#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
192# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
193# 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
194# else 321# else
195# define EV_PID_HASHSIZE 16 322# define EV_USE_EVENTFD 0
196# endif 323# endif
197#endif 324#endif
198 325
199#ifndef EV_INOTIFY_HASHSIZE 326#ifndef EV_USE_SIGNALFD
200# if EV_MINIMAL 327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
201# define EV_INOTIFY_HASHSIZE 1 328# define EV_USE_SIGNALFD EV_FEATURE_OS
202# else 329# else
203# define EV_INOTIFY_HASHSIZE 16 330# define EV_USE_SIGNALFD 0
204# endif 331# endif
205#endif 332#endif
206 333
207/**/ 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
208 373
209#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
210# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
211# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
212#endif 377#endif
… …
220# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
221# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
222#endif 387#endif
223 388
224#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
225# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
226# include <sys/select.h> 392# include <sys/select.h>
227# endif 393# endif
228#endif 394#endif
229 395
230#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
231# include <sys/inotify.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
232#endif 404#endif
233 405
234#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
235# include <winsock.h> 407# include <winsock.h>
236#endif 408#endif
237 409
410#if EV_USE_EVENTFD
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
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
425
426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
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};
446#endif
447
238/**/ 448/**/
239 449
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
240/* 456/*
241 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
242 * It is added to ev_rt_now when scheduling periodics
243 * to ensure progress, time-wise, even when rounding
244 * errors are against us.
245 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
246 * Better solutions welcome.
247 */ 459 */
248#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
249 462
250#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) */
251#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) */
252/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
253 465
254#if __GNUC__ >= 4 466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
255# 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)
256# 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
257#else 493#else
258# define expect(expr,value) (expr) 494 #define ecb_inline static
259# define noinline
260# if __STDC_VERSION__ < 199901L
261# define inline
262# 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
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
263#endif 508 #endif
509#endif
264 510
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 defined(_WIN32) && defined(MemoryBarrier)
517 #define ECB_MEMORY_FENCE MemoryBarrier ()
518 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
519 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
520 #endif
521#endif
522
523#ifndef ECB_MEMORY_FENCE
524 #include <pthread.h>
525
526 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
527 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
528 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
529 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
530#endif
531
532#if ECB_GCC_VERSION(3,1)
533 #define ecb_attribute(attrlist) __attribute__(attrlist)
534 #define ecb_is_constant(expr) __builtin_constant_p (expr)
535 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
536 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
537#else
538 #define ecb_attribute(attrlist)
539 #define ecb_is_constant(expr) 0
540 #define ecb_expect(expr,value) (expr)
541 #define ecb_prefetch(addr,rw,locality)
542#endif
543
544#define ecb_noinline ecb_attribute ((__noinline__))
545#define ecb_noreturn ecb_attribute ((__noreturn__))
546#define ecb_unused ecb_attribute ((__unused__))
547#define ecb_const ecb_attribute ((__const__))
548#define ecb_pure ecb_attribute ((__pure__))
549
550#if ECB_GCC_VERSION(4,3)
551 #define ecb_artificial ecb_attribute ((__artificial__))
552 #define ecb_hot ecb_attribute ((__hot__))
553 #define ecb_cold ecb_attribute ((__cold__))
554#else
555 #define ecb_artificial
556 #define ecb_hot
557 #define ecb_cold
558#endif
559
560/* put around conditional expressions if you are very sure that the */
561/* expression is mostly true or mostly false. note that these return */
562/* booleans, not the expression. */
265#define expect_false(expr) expect ((expr) != 0, 0) 563#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
266#define expect_true(expr) expect ((expr) != 0, 1) 564#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
565/* ecb.h end */
566
567#define expect_false(cond) ecb_expect_false (cond)
568#define expect_true(cond) ecb_expect_true (cond)
569#define noinline ecb_noinline
570
267#define inline_size static inline 571#define inline_size ecb_inline
268 572
269#if EV_MINIMAL 573#if EV_FEATURE_CODE
574# define inline_speed ecb_inline
575#else
270# define inline_speed static noinline 576# define inline_speed static noinline
577#endif
578
579#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
580
581#if EV_MINPRI == EV_MAXPRI
582# define ABSPRI(w) (((W)w), 0)
271#else 583#else
272# define inline_speed static inline
273#endif
274
275#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
276#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 584# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
585#endif
277 586
278#define EMPTY /* required for microsofts broken pseudo-c compiler */ 587#define EMPTY /* required for microsofts broken pseudo-c compiler */
279#define EMPTY2(a,b) /* used to suppress some warnings */ 588#define EMPTY2(a,b) /* used to suppress some warnings */
280 589
281typedef ev_watcher *W; 590typedef ev_watcher *W;
282typedef ev_watcher_list *WL; 591typedef ev_watcher_list *WL;
283typedef ev_watcher_time *WT; 592typedef ev_watcher_time *WT;
284 593
594#define ev_active(w) ((W)(w))->active
595#define ev_at(w) ((WT)(w))->at
596
597#if EV_USE_REALTIME
285/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 598/* sig_atomic_t is used to avoid per-thread variables or locking but still */
286/* giving it a reasonably high chance of working on typical architetcures */ 599/* giving it a reasonably high chance of working on typical architectures */
600static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
601#endif
602
603#if EV_USE_MONOTONIC
287static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 604static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
605#endif
606
607#ifndef EV_FD_TO_WIN32_HANDLE
608# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
609#endif
610#ifndef EV_WIN32_HANDLE_TO_FD
611# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
612#endif
613#ifndef EV_WIN32_CLOSE_FD
614# define EV_WIN32_CLOSE_FD(fd) close (fd)
615#endif
288 616
289#ifdef _WIN32 617#ifdef _WIN32
290# include "ev_win32.c" 618# include "ev_win32.c"
291#endif 619#endif
292 620
293/*****************************************************************************/ 621/*****************************************************************************/
294 622
623/* define a suitable floor function (only used by periodics atm) */
624
625#if EV_USE_FLOOR
626# include <math.h>
627# define ev_floor(v) floor (v)
628#else
629
630#include <float.h>
631
632/* a floor() replacement function, should be independent of ev_tstamp type */
633static ev_tstamp noinline
634ev_floor (ev_tstamp v)
635{
636 /* the choice of shift factor is not terribly important */
637#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
638 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
639#else
640 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
641#endif
642
643 /* argument too large for an unsigned long? */
644 if (expect_false (v >= shift))
645 {
646 ev_tstamp f;
647
648 if (v == v - 1.)
649 return v; /* very large number */
650
651 f = shift * ev_floor (v * (1. / shift));
652 return f + ev_floor (v - f);
653 }
654
655 /* special treatment for negative args? */
656 if (expect_false (v < 0.))
657 {
658 ev_tstamp f = -ev_floor (-v);
659
660 return f - (f == v ? 0 : 1);
661 }
662
663 /* fits into an unsigned long */
664 return (unsigned long)v;
665}
666
667#endif
668
669/*****************************************************************************/
670
671#ifdef __linux
672# include <sys/utsname.h>
673#endif
674
675static unsigned int noinline ecb_cold
676ev_linux_version (void)
677{
678#ifdef __linux
679 unsigned int v = 0;
680 struct utsname buf;
681 int i;
682 char *p = buf.release;
683
684 if (uname (&buf))
685 return 0;
686
687 for (i = 3+1; --i; )
688 {
689 unsigned int c = 0;
690
691 for (;;)
692 {
693 if (*p >= '0' && *p <= '9')
694 c = c * 10 + *p++ - '0';
695 else
696 {
697 p += *p == '.';
698 break;
699 }
700 }
701
702 v = (v << 8) | c;
703 }
704
705 return v;
706#else
707 return 0;
708#endif
709}
710
711/*****************************************************************************/
712
713#if EV_AVOID_STDIO
714static void noinline ecb_cold
715ev_printerr (const char *msg)
716{
717 write (STDERR_FILENO, msg, strlen (msg));
718}
719#endif
720
295static void (*syserr_cb)(const char *msg); 721static void (*syserr_cb)(const char *msg);
296 722
297void 723void ecb_cold
298ev_set_syserr_cb (void (*cb)(const char *msg)) 724ev_set_syserr_cb (void (*cb)(const char *msg))
299{ 725{
300 syserr_cb = cb; 726 syserr_cb = cb;
301} 727}
302 728
303static void noinline 729static void noinline ecb_cold
304syserr (const char *msg) 730ev_syserr (const char *msg)
305{ 731{
306 if (!msg) 732 if (!msg)
307 msg = "(libev) system error"; 733 msg = "(libev) system error";
308 734
309 if (syserr_cb) 735 if (syserr_cb)
310 syserr_cb (msg); 736 syserr_cb (msg);
311 else 737 else
312 { 738 {
739#if EV_AVOID_STDIO
740 ev_printerr (msg);
741 ev_printerr (": ");
742 ev_printerr (strerror (errno));
743 ev_printerr ("\n");
744#else
313 perror (msg); 745 perror (msg);
746#endif
314 abort (); 747 abort ();
315 } 748 }
316} 749}
317 750
751static void *
752ev_realloc_emul (void *ptr, long size)
753{
754#if __GLIBC__
755 return realloc (ptr, size);
756#else
757 /* some systems, notably openbsd and darwin, fail to properly
758 * implement realloc (x, 0) (as required by both ansi c-89 and
759 * the single unix specification, so work around them here.
760 */
761
762 if (size)
763 return realloc (ptr, size);
764
765 free (ptr);
766 return 0;
767#endif
768}
769
318static void *(*alloc)(void *ptr, long size); 770static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
319 771
320void 772void ecb_cold
321ev_set_allocator (void *(*cb)(void *ptr, long size)) 773ev_set_allocator (void *(*cb)(void *ptr, long size))
322{ 774{
323 alloc = cb; 775 alloc = cb;
324} 776}
325 777
326inline_speed void * 778inline_speed void *
327ev_realloc (void *ptr, long size) 779ev_realloc (void *ptr, long size)
328{ 780{
329 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 781 ptr = alloc (ptr, size);
330 782
331 if (!ptr && size) 783 if (!ptr && size)
332 { 784 {
785#if EV_AVOID_STDIO
786 ev_printerr ("(libev) memory allocation failed, aborting.\n");
787#else
333 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 788 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
789#endif
334 abort (); 790 abort ();
335 } 791 }
336 792
337 return ptr; 793 return ptr;
338} 794}
… …
340#define ev_malloc(size) ev_realloc (0, (size)) 796#define ev_malloc(size) ev_realloc (0, (size))
341#define ev_free(ptr) ev_realloc ((ptr), 0) 797#define ev_free(ptr) ev_realloc ((ptr), 0)
342 798
343/*****************************************************************************/ 799/*****************************************************************************/
344 800
801/* set in reify when reification needed */
802#define EV_ANFD_REIFY 1
803
804/* file descriptor info structure */
345typedef struct 805typedef struct
346{ 806{
347 WL head; 807 WL head;
348 unsigned char events; 808 unsigned char events; /* the events watched for */
809 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
810 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
349 unsigned char reify; 811 unsigned char unused;
812#if EV_USE_EPOLL
813 unsigned int egen; /* generation counter to counter epoll bugs */
814#endif
350#if EV_SELECT_IS_WINSOCKET 815#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
351 SOCKET handle; 816 SOCKET handle;
352#endif 817#endif
818#if EV_USE_IOCP
819 OVERLAPPED or, ow;
820#endif
353} ANFD; 821} ANFD;
354 822
823/* stores the pending event set for a given watcher */
355typedef struct 824typedef struct
356{ 825{
357 W w; 826 W w;
358 int events; 827 int events; /* the pending event set for the given watcher */
359} ANPENDING; 828} ANPENDING;
360 829
361#if EV_USE_INOTIFY 830#if EV_USE_INOTIFY
831/* hash table entry per inotify-id */
362typedef struct 832typedef struct
363{ 833{
364 WL head; 834 WL head;
365} ANFS; 835} ANFS;
836#endif
837
838/* Heap Entry */
839#if EV_HEAP_CACHE_AT
840 /* a heap element */
841 typedef struct {
842 ev_tstamp at;
843 WT w;
844 } ANHE;
845
846 #define ANHE_w(he) (he).w /* access watcher, read-write */
847 #define ANHE_at(he) (he).at /* access cached at, read-only */
848 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
849#else
850 /* a heap element */
851 typedef WT ANHE;
852
853 #define ANHE_w(he) (he)
854 #define ANHE_at(he) (he)->at
855 #define ANHE_at_cache(he)
366#endif 856#endif
367 857
368#if EV_MULTIPLICITY 858#if EV_MULTIPLICITY
369 859
370 struct ev_loop 860 struct ev_loop
… …
389 879
390 static int ev_default_loop_ptr; 880 static int ev_default_loop_ptr;
391 881
392#endif 882#endif
393 883
884#if EV_FEATURE_API
885# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
886# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
887# define EV_INVOKE_PENDING invoke_cb (EV_A)
888#else
889# define EV_RELEASE_CB (void)0
890# define EV_ACQUIRE_CB (void)0
891# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
892#endif
893
894#define EVBREAK_RECURSE 0x80
895
394/*****************************************************************************/ 896/*****************************************************************************/
395 897
898#ifndef EV_HAVE_EV_TIME
396ev_tstamp 899ev_tstamp
397ev_time (void) 900ev_time (void)
398{ 901{
399#if EV_USE_REALTIME 902#if EV_USE_REALTIME
903 if (expect_true (have_realtime))
904 {
400 struct timespec ts; 905 struct timespec ts;
401 clock_gettime (CLOCK_REALTIME, &ts); 906 clock_gettime (CLOCK_REALTIME, &ts);
402 return ts.tv_sec + ts.tv_nsec * 1e-9; 907 return ts.tv_sec + ts.tv_nsec * 1e-9;
403#else 908 }
909#endif
910
404 struct timeval tv; 911 struct timeval tv;
405 gettimeofday (&tv, 0); 912 gettimeofday (&tv, 0);
406 return tv.tv_sec + tv.tv_usec * 1e-6; 913 return tv.tv_sec + tv.tv_usec * 1e-6;
407#endif
408} 914}
915#endif
409 916
410ev_tstamp inline_size 917inline_size ev_tstamp
411get_clock (void) 918get_clock (void)
412{ 919{
413#if EV_USE_MONOTONIC 920#if EV_USE_MONOTONIC
414 if (expect_true (have_monotonic)) 921 if (expect_true (have_monotonic))
415 { 922 {
… …
436 if (delay > 0.) 943 if (delay > 0.)
437 { 944 {
438#if EV_USE_NANOSLEEP 945#if EV_USE_NANOSLEEP
439 struct timespec ts; 946 struct timespec ts;
440 947
441 ts.tv_sec = (time_t)delay; 948 EV_TS_SET (ts, delay);
442 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
443
444 nanosleep (&ts, 0); 949 nanosleep (&ts, 0);
445#elif defined(_WIN32) 950#elif defined(_WIN32)
446 Sleep (delay * 1e3); 951 Sleep ((unsigned long)(delay * 1e3));
447#else 952#else
448 struct timeval tv; 953 struct timeval tv;
449 954
450 tv.tv_sec = (time_t)delay; 955 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
451 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 956 /* something not guaranteed by newer posix versions, but guaranteed */
452 957 /* by older ones */
958 EV_TV_SET (tv, delay);
453 select (0, 0, 0, 0, &tv); 959 select (0, 0, 0, 0, &tv);
454#endif 960#endif
455 } 961 }
456} 962}
457 963
458/*****************************************************************************/ 964/*****************************************************************************/
459 965
460int inline_size 966#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
967
968/* find a suitable new size for the given array, */
969/* hopefully by rounding to a nice-to-malloc size */
970inline_size int
461array_nextsize (int elem, int cur, int cnt) 971array_nextsize (int elem, int cur, int cnt)
462{ 972{
463 int ncur = cur + 1; 973 int ncur = cur + 1;
464 974
465 do 975 do
466 ncur <<= 1; 976 ncur <<= 1;
467 while (cnt > ncur); 977 while (cnt > ncur);
468 978
469 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 979 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
470 if (elem * ncur > 4096) 980 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
471 { 981 {
472 ncur *= elem; 982 ncur *= elem;
473 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 983 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
474 ncur = ncur - sizeof (void *) * 4; 984 ncur = ncur - sizeof (void *) * 4;
475 ncur /= elem; 985 ncur /= elem;
476 } 986 }
477 987
478 return ncur; 988 return ncur;
479} 989}
480 990
481static noinline void * 991static void * noinline ecb_cold
482array_realloc (int elem, void *base, int *cur, int cnt) 992array_realloc (int elem, void *base, int *cur, int cnt)
483{ 993{
484 *cur = array_nextsize (elem, *cur, cnt); 994 *cur = array_nextsize (elem, *cur, cnt);
485 return ev_realloc (base, elem * *cur); 995 return ev_realloc (base, elem * *cur);
486} 996}
997
998#define array_init_zero(base,count) \
999 memset ((void *)(base), 0, sizeof (*(base)) * (count))
487 1000
488#define array_needsize(type,base,cur,cnt,init) \ 1001#define array_needsize(type,base,cur,cnt,init) \
489 if (expect_false ((cnt) > (cur))) \ 1002 if (expect_false ((cnt) > (cur))) \
490 { \ 1003 { \
491 int ocur_ = (cur); \ 1004 int ecb_unused ocur_ = (cur); \
492 (base) = (type *)array_realloc \ 1005 (base) = (type *)array_realloc \
493 (sizeof (type), (base), &(cur), (cnt)); \ 1006 (sizeof (type), (base), &(cur), (cnt)); \
494 init ((base) + (ocur_), (cur) - ocur_); \ 1007 init ((base) + (ocur_), (cur) - ocur_); \
495 } 1008 }
496 1009
… …
503 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1016 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
504 } 1017 }
505#endif 1018#endif
506 1019
507#define array_free(stem, idx) \ 1020#define array_free(stem, idx) \
508 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1021 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
509 1022
510/*****************************************************************************/ 1023/*****************************************************************************/
1024
1025/* dummy callback for pending events */
1026static void noinline
1027pendingcb (EV_P_ ev_prepare *w, int revents)
1028{
1029}
511 1030
512void noinline 1031void noinline
513ev_feed_event (EV_P_ void *w, int revents) 1032ev_feed_event (EV_P_ void *w, int revents)
514{ 1033{
515 W w_ = (W)w; 1034 W w_ = (W)w;
… …
524 pendings [pri][w_->pending - 1].w = w_; 1043 pendings [pri][w_->pending - 1].w = w_;
525 pendings [pri][w_->pending - 1].events = revents; 1044 pendings [pri][w_->pending - 1].events = revents;
526 } 1045 }
527} 1046}
528 1047
529void inline_speed 1048inline_speed void
1049feed_reverse (EV_P_ W w)
1050{
1051 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1052 rfeeds [rfeedcnt++] = w;
1053}
1054
1055inline_size void
1056feed_reverse_done (EV_P_ int revents)
1057{
1058 do
1059 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1060 while (rfeedcnt);
1061}
1062
1063inline_speed void
530queue_events (EV_P_ W *events, int eventcnt, int type) 1064queue_events (EV_P_ W *events, int eventcnt, int type)
531{ 1065{
532 int i; 1066 int i;
533 1067
534 for (i = 0; i < eventcnt; ++i) 1068 for (i = 0; i < eventcnt; ++i)
535 ev_feed_event (EV_A_ events [i], type); 1069 ev_feed_event (EV_A_ events [i], type);
536} 1070}
537 1071
538/*****************************************************************************/ 1072/*****************************************************************************/
539 1073
540void inline_size 1074inline_speed void
541anfds_init (ANFD *base, int count)
542{
543 while (count--)
544 {
545 base->head = 0;
546 base->events = EV_NONE;
547 base->reify = 0;
548
549 ++base;
550 }
551}
552
553void inline_speed
554fd_event (EV_P_ int fd, int revents) 1075fd_event_nocheck (EV_P_ int fd, int revents)
555{ 1076{
556 ANFD *anfd = anfds + fd; 1077 ANFD *anfd = anfds + fd;
557 ev_io *w; 1078 ev_io *w;
558 1079
559 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1080 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
563 if (ev) 1084 if (ev)
564 ev_feed_event (EV_A_ (W)w, ev); 1085 ev_feed_event (EV_A_ (W)w, ev);
565 } 1086 }
566} 1087}
567 1088
1089/* do not submit kernel events for fds that have reify set */
1090/* because that means they changed while we were polling for new events */
1091inline_speed void
1092fd_event (EV_P_ int fd, int revents)
1093{
1094 ANFD *anfd = anfds + fd;
1095
1096 if (expect_true (!anfd->reify))
1097 fd_event_nocheck (EV_A_ fd, revents);
1098}
1099
568void 1100void
569ev_feed_fd_event (EV_P_ int fd, int revents) 1101ev_feed_fd_event (EV_P_ int fd, int revents)
570{ 1102{
571 if (fd >= 0 && fd < anfdmax) 1103 if (fd >= 0 && fd < anfdmax)
572 fd_event (EV_A_ fd, revents); 1104 fd_event_nocheck (EV_A_ fd, revents);
573} 1105}
574 1106
575void inline_size 1107/* make sure the external fd watch events are in-sync */
1108/* with the kernel/libev internal state */
1109inline_size void
576fd_reify (EV_P) 1110fd_reify (EV_P)
577{ 1111{
578 int i; 1112 int i;
1113
1114#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1115 for (i = 0; i < fdchangecnt; ++i)
1116 {
1117 int fd = fdchanges [i];
1118 ANFD *anfd = anfds + fd;
1119
1120 if (anfd->reify & EV__IOFDSET && anfd->head)
1121 {
1122 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1123
1124 if (handle != anfd->handle)
1125 {
1126 unsigned long arg;
1127
1128 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1129
1130 /* handle changed, but fd didn't - we need to do it in two steps */
1131 backend_modify (EV_A_ fd, anfd->events, 0);
1132 anfd->events = 0;
1133 anfd->handle = handle;
1134 }
1135 }
1136 }
1137#endif
579 1138
580 for (i = 0; i < fdchangecnt; ++i) 1139 for (i = 0; i < fdchangecnt; ++i)
581 { 1140 {
582 int fd = fdchanges [i]; 1141 int fd = fdchanges [i];
583 ANFD *anfd = anfds + fd; 1142 ANFD *anfd = anfds + fd;
584 ev_io *w; 1143 ev_io *w;
585 1144
586 unsigned char events = 0; 1145 unsigned char o_events = anfd->events;
1146 unsigned char o_reify = anfd->reify;
587 1147
588 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1148 anfd->reify = 0;
589 events |= (unsigned char)w->events;
590 1149
591#if EV_SELECT_IS_WINSOCKET 1150 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
592 if (events)
593 { 1151 {
594 unsigned long argp; 1152 anfd->events = 0;
595 anfd->handle = _get_osfhandle (fd); 1153
596 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1154 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1155 anfd->events |= (unsigned char)w->events;
1156
1157 if (o_events != anfd->events)
1158 o_reify = EV__IOFDSET; /* actually |= */
597 } 1159 }
598#endif
599 1160
600 { 1161 if (o_reify & EV__IOFDSET)
601 unsigned char o_events = anfd->events;
602 unsigned char o_reify = anfd->reify;
603
604 anfd->reify = 0;
605 anfd->events = events;
606
607 if (o_events != events || o_reify & EV_IOFDSET)
608 backend_modify (EV_A_ fd, o_events, events); 1162 backend_modify (EV_A_ fd, o_events, anfd->events);
609 }
610 } 1163 }
611 1164
612 fdchangecnt = 0; 1165 fdchangecnt = 0;
613} 1166}
614 1167
615void inline_size 1168/* something about the given fd changed */
1169inline_size void
616fd_change (EV_P_ int fd, int flags) 1170fd_change (EV_P_ int fd, int flags)
617{ 1171{
618 unsigned char reify = anfds [fd].reify; 1172 unsigned char reify = anfds [fd].reify;
619 anfds [fd].reify |= flags; 1173 anfds [fd].reify |= flags;
620 1174
… …
624 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1178 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
625 fdchanges [fdchangecnt - 1] = fd; 1179 fdchanges [fdchangecnt - 1] = fd;
626 } 1180 }
627} 1181}
628 1182
629void inline_speed 1183/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1184inline_speed void ecb_cold
630fd_kill (EV_P_ int fd) 1185fd_kill (EV_P_ int fd)
631{ 1186{
632 ev_io *w; 1187 ev_io *w;
633 1188
634 while ((w = (ev_io *)anfds [fd].head)) 1189 while ((w = (ev_io *)anfds [fd].head))
… …
636 ev_io_stop (EV_A_ w); 1191 ev_io_stop (EV_A_ w);
637 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1192 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
638 } 1193 }
639} 1194}
640 1195
641int inline_size 1196/* check whether the given fd is actually valid, for error recovery */
1197inline_size int ecb_cold
642fd_valid (int fd) 1198fd_valid (int fd)
643{ 1199{
644#ifdef _WIN32 1200#ifdef _WIN32
645 return _get_osfhandle (fd) != -1; 1201 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
646#else 1202#else
647 return fcntl (fd, F_GETFD) != -1; 1203 return fcntl (fd, F_GETFD) != -1;
648#endif 1204#endif
649} 1205}
650 1206
651/* called on EBADF to verify fds */ 1207/* called on EBADF to verify fds */
652static void noinline 1208static void noinline ecb_cold
653fd_ebadf (EV_P) 1209fd_ebadf (EV_P)
654{ 1210{
655 int fd; 1211 int fd;
656 1212
657 for (fd = 0; fd < anfdmax; ++fd) 1213 for (fd = 0; fd < anfdmax; ++fd)
658 if (anfds [fd].events) 1214 if (anfds [fd].events)
659 if (!fd_valid (fd) == -1 && errno == EBADF) 1215 if (!fd_valid (fd) && errno == EBADF)
660 fd_kill (EV_A_ fd); 1216 fd_kill (EV_A_ fd);
661} 1217}
662 1218
663/* called on ENOMEM in select/poll to kill some fds and retry */ 1219/* called on ENOMEM in select/poll to kill some fds and retry */
664static void noinline 1220static void noinline ecb_cold
665fd_enomem (EV_P) 1221fd_enomem (EV_P)
666{ 1222{
667 int fd; 1223 int fd;
668 1224
669 for (fd = anfdmax; fd--; ) 1225 for (fd = anfdmax; fd--; )
670 if (anfds [fd].events) 1226 if (anfds [fd].events)
671 { 1227 {
672 fd_kill (EV_A_ fd); 1228 fd_kill (EV_A_ fd);
673 return; 1229 break;
674 } 1230 }
675} 1231}
676 1232
677/* usually called after fork if backend needs to re-arm all fds from scratch */ 1233/* usually called after fork if backend needs to re-arm all fds from scratch */
678static void noinline 1234static void noinline
… …
682 1238
683 for (fd = 0; fd < anfdmax; ++fd) 1239 for (fd = 0; fd < anfdmax; ++fd)
684 if (anfds [fd].events) 1240 if (anfds [fd].events)
685 { 1241 {
686 anfds [fd].events = 0; 1242 anfds [fd].events = 0;
1243 anfds [fd].emask = 0;
687 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1244 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
688 } 1245 }
689} 1246}
690 1247
691/*****************************************************************************/ 1248/* used to prepare libev internal fd's */
692 1249/* this is not fork-safe */
693void inline_speed 1250inline_speed void
694upheap (WT *heap, int k)
695{
696 WT w = heap [k];
697
698 while (k)
699 {
700 int p = (k - 1) >> 1;
701
702 if (heap [p]->at <= w->at)
703 break;
704
705 heap [k] = heap [p];
706 ((W)heap [k])->active = k + 1;
707 k = p;
708 }
709
710 heap [k] = w;
711 ((W)heap [k])->active = k + 1;
712}
713
714void inline_speed
715downheap (WT *heap, int N, int k)
716{
717 WT w = heap [k];
718
719 for (;;)
720 {
721 int c = (k << 1) + 1;
722
723 if (c >= N)
724 break;
725
726 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
727 ? 1 : 0;
728
729 if (w->at <= heap [c]->at)
730 break;
731
732 heap [k] = heap [c];
733 ((W)heap [k])->active = k + 1;
734
735 k = c;
736 }
737
738 heap [k] = w;
739 ((W)heap [k])->active = k + 1;
740}
741
742void inline_size
743adjustheap (WT *heap, int N, int k)
744{
745 upheap (heap, k);
746 downheap (heap, N, k);
747}
748
749/*****************************************************************************/
750
751typedef struct
752{
753 WL head;
754 sig_atomic_t volatile gotsig;
755} ANSIG;
756
757static ANSIG *signals;
758static int signalmax;
759
760static int sigpipe [2];
761static sig_atomic_t volatile gotsig;
762static ev_io sigev;
763
764void inline_size
765signals_init (ANSIG *base, int count)
766{
767 while (count--)
768 {
769 base->head = 0;
770 base->gotsig = 0;
771
772 ++base;
773 }
774}
775
776static void
777sighandler (int signum)
778{
779#if _WIN32
780 signal (signum, sighandler);
781#endif
782
783 signals [signum - 1].gotsig = 1;
784
785 if (!gotsig)
786 {
787 int old_errno = errno;
788 gotsig = 1;
789 write (sigpipe [1], &signum, 1);
790 errno = old_errno;
791 }
792}
793
794void noinline
795ev_feed_signal_event (EV_P_ int signum)
796{
797 WL w;
798
799#if EV_MULTIPLICITY
800 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
801#endif
802
803 --signum;
804
805 if (signum < 0 || signum >= signalmax)
806 return;
807
808 signals [signum].gotsig = 0;
809
810 for (w = signals [signum].head; w; w = w->next)
811 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
812}
813
814static void
815sigcb (EV_P_ ev_io *iow, int revents)
816{
817 int signum;
818
819 read (sigpipe [0], &revents, 1);
820 gotsig = 0;
821
822 for (signum = signalmax; signum--; )
823 if (signals [signum].gotsig)
824 ev_feed_signal_event (EV_A_ signum + 1);
825}
826
827void inline_speed
828fd_intern (int fd) 1251fd_intern (int fd)
829{ 1252{
830#ifdef _WIN32 1253#ifdef _WIN32
831 int arg = 1; 1254 unsigned long arg = 1;
832 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1255 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
833#else 1256#else
834 fcntl (fd, F_SETFD, FD_CLOEXEC); 1257 fcntl (fd, F_SETFD, FD_CLOEXEC);
835 fcntl (fd, F_SETFL, O_NONBLOCK); 1258 fcntl (fd, F_SETFL, O_NONBLOCK);
836#endif 1259#endif
837} 1260}
838 1261
839static void noinline
840siginit (EV_P)
841{
842 fd_intern (sigpipe [0]);
843 fd_intern (sigpipe [1]);
844
845 ev_io_set (&sigev, sigpipe [0], EV_READ);
846 ev_io_start (EV_A_ &sigev);
847 ev_unref (EV_A); /* child watcher should not keep loop alive */
848}
849
850/*****************************************************************************/ 1262/*****************************************************************************/
851 1263
1264/*
1265 * the heap functions want a real array index. array index 0 is guaranteed to not
1266 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1267 * the branching factor of the d-tree.
1268 */
1269
1270/*
1271 * at the moment we allow libev the luxury of two heaps,
1272 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1273 * which is more cache-efficient.
1274 * the difference is about 5% with 50000+ watchers.
1275 */
1276#if EV_USE_4HEAP
1277
1278#define DHEAP 4
1279#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1280#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1281#define UPHEAP_DONE(p,k) ((p) == (k))
1282
1283/* away from the root */
1284inline_speed void
1285downheap (ANHE *heap, int N, int k)
1286{
1287 ANHE he = heap [k];
1288 ANHE *E = heap + N + HEAP0;
1289
1290 for (;;)
1291 {
1292 ev_tstamp minat;
1293 ANHE *minpos;
1294 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1295
1296 /* find minimum child */
1297 if (expect_true (pos + DHEAP - 1 < E))
1298 {
1299 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1300 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1301 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1302 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1303 }
1304 else if (pos < E)
1305 {
1306 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1307 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1308 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1309 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1310 }
1311 else
1312 break;
1313
1314 if (ANHE_at (he) <= minat)
1315 break;
1316
1317 heap [k] = *minpos;
1318 ev_active (ANHE_w (*minpos)) = k;
1319
1320 k = minpos - heap;
1321 }
1322
1323 heap [k] = he;
1324 ev_active (ANHE_w (he)) = k;
1325}
1326
1327#else /* 4HEAP */
1328
1329#define HEAP0 1
1330#define HPARENT(k) ((k) >> 1)
1331#define UPHEAP_DONE(p,k) (!(p))
1332
1333/* away from the root */
1334inline_speed void
1335downheap (ANHE *heap, int N, int k)
1336{
1337 ANHE he = heap [k];
1338
1339 for (;;)
1340 {
1341 int c = k << 1;
1342
1343 if (c >= N + HEAP0)
1344 break;
1345
1346 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1347 ? 1 : 0;
1348
1349 if (ANHE_at (he) <= ANHE_at (heap [c]))
1350 break;
1351
1352 heap [k] = heap [c];
1353 ev_active (ANHE_w (heap [k])) = k;
1354
1355 k = c;
1356 }
1357
1358 heap [k] = he;
1359 ev_active (ANHE_w (he)) = k;
1360}
1361#endif
1362
1363/* towards the root */
1364inline_speed void
1365upheap (ANHE *heap, int k)
1366{
1367 ANHE he = heap [k];
1368
1369 for (;;)
1370 {
1371 int p = HPARENT (k);
1372
1373 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1374 break;
1375
1376 heap [k] = heap [p];
1377 ev_active (ANHE_w (heap [k])) = k;
1378 k = p;
1379 }
1380
1381 heap [k] = he;
1382 ev_active (ANHE_w (he)) = k;
1383}
1384
1385/* move an element suitably so it is in a correct place */
1386inline_size void
1387adjustheap (ANHE *heap, int N, int k)
1388{
1389 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1390 upheap (heap, k);
1391 else
1392 downheap (heap, N, k);
1393}
1394
1395/* rebuild the heap: this function is used only once and executed rarely */
1396inline_size void
1397reheap (ANHE *heap, int N)
1398{
1399 int i;
1400
1401 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1402 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1403 for (i = 0; i < N; ++i)
1404 upheap (heap, i + HEAP0);
1405}
1406
1407/*****************************************************************************/
1408
1409/* associate signal watchers to a signal signal */
1410typedef struct
1411{
1412 EV_ATOMIC_T pending;
1413#if EV_MULTIPLICITY
1414 EV_P;
1415#endif
1416 WL head;
1417} ANSIG;
1418
1419static ANSIG signals [EV_NSIG - 1];
1420
1421/*****************************************************************************/
1422
1423#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1424
1425static void noinline ecb_cold
1426evpipe_init (EV_P)
1427{
1428 if (!ev_is_active (&pipe_w))
1429 {
1430# if EV_USE_EVENTFD
1431 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1432 if (evfd < 0 && errno == EINVAL)
1433 evfd = eventfd (0, 0);
1434
1435 if (evfd >= 0)
1436 {
1437 evpipe [0] = -1;
1438 fd_intern (evfd); /* doing it twice doesn't hurt */
1439 ev_io_set (&pipe_w, evfd, EV_READ);
1440 }
1441 else
1442# endif
1443 {
1444 while (pipe (evpipe))
1445 ev_syserr ("(libev) error creating signal/async pipe");
1446
1447 fd_intern (evpipe [0]);
1448 fd_intern (evpipe [1]);
1449 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1450 }
1451
1452 ev_io_start (EV_A_ &pipe_w);
1453 ev_unref (EV_A); /* watcher should not keep loop alive */
1454 }
1455}
1456
1457inline_speed void
1458evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1459{
1460 if (expect_true (*flag))
1461 /*return*//*D*/;
1462
1463 *flag = 1;
1464
1465 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1466
1467 pipe_write_skipped = 1;
1468
1469 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1470
1471 if (pipe_write_wanted)
1472 {
1473 int old_errno;
1474
1475 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1476
1477 old_errno = errno; /* save errno because write will clobber it */
1478
1479#if EV_USE_EVENTFD
1480 if (evfd >= 0)
1481 {
1482 uint64_t counter = 1;
1483 write (evfd, &counter, sizeof (uint64_t));
1484 }
1485 else
1486#endif
1487 {
1488 /* win32 people keep sending patches that change this write() to send() */
1489 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1490 /* so when you think this write should be a send instead, please find out */
1491 /* where your send() is from - it's definitely not the microsoft send, and */
1492 /* tell me. thank you. */
1493 write (evpipe [1], &(evpipe [1]), 1);
1494 }
1495
1496 errno = old_errno;
1497 }
1498}
1499
1500/* called whenever the libev signal pipe */
1501/* got some events (signal, async) */
1502static void
1503pipecb (EV_P_ ev_io *iow, int revents)
1504{
1505 int i;
1506
1507 if (revents & EV_READ)
1508 {
1509#if EV_USE_EVENTFD
1510 if (evfd >= 0)
1511 {
1512 uint64_t counter;
1513 read (evfd, &counter, sizeof (uint64_t));
1514 }
1515 else
1516#endif
1517 {
1518 char dummy;
1519 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1520 read (evpipe [0], &dummy, 1);
1521 }
1522 }
1523
1524 pipe_write_skipped = 0;
1525
1526#if EV_SIGNAL_ENABLE
1527 if (sig_pending)
1528 {
1529 sig_pending = 0;
1530
1531 for (i = EV_NSIG - 1; i--; )
1532 if (expect_false (signals [i].pending))
1533 ev_feed_signal_event (EV_A_ i + 1);
1534 }
1535#endif
1536
1537#if EV_ASYNC_ENABLE
1538 if (async_pending)
1539 {
1540 async_pending = 0;
1541
1542 for (i = asynccnt; i--; )
1543 if (asyncs [i]->sent)
1544 {
1545 asyncs [i]->sent = 0;
1546 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1547 }
1548 }
1549#endif
1550}
1551
1552/*****************************************************************************/
1553
1554void
1555ev_feed_signal (int signum)
1556{
1557#if EV_MULTIPLICITY
1558 EV_P = signals [signum - 1].loop;
1559
1560 if (!EV_A)
1561 return;
1562#endif
1563
1564 if (!ev_active (&pipe_w))
1565 return;
1566
1567 signals [signum - 1].pending = 1;
1568 evpipe_write (EV_A_ &sig_pending);
1569}
1570
1571static void
1572ev_sighandler (int signum)
1573{
1574#ifdef _WIN32
1575 signal (signum, ev_sighandler);
1576#endif
1577
1578 ev_feed_signal (signum);
1579}
1580
1581void noinline
1582ev_feed_signal_event (EV_P_ int signum)
1583{
1584 WL w;
1585
1586 if (expect_false (signum <= 0 || signum > EV_NSIG))
1587 return;
1588
1589 --signum;
1590
1591#if EV_MULTIPLICITY
1592 /* it is permissible to try to feed a signal to the wrong loop */
1593 /* or, likely more useful, feeding a signal nobody is waiting for */
1594
1595 if (expect_false (signals [signum].loop != EV_A))
1596 return;
1597#endif
1598
1599 signals [signum].pending = 0;
1600
1601 for (w = signals [signum].head; w; w = w->next)
1602 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1603}
1604
1605#if EV_USE_SIGNALFD
1606static void
1607sigfdcb (EV_P_ ev_io *iow, int revents)
1608{
1609 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1610
1611 for (;;)
1612 {
1613 ssize_t res = read (sigfd, si, sizeof (si));
1614
1615 /* not ISO-C, as res might be -1, but works with SuS */
1616 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1617 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1618
1619 if (res < (ssize_t)sizeof (si))
1620 break;
1621 }
1622}
1623#endif
1624
1625#endif
1626
1627/*****************************************************************************/
1628
1629#if EV_CHILD_ENABLE
852static WL childs [EV_PID_HASHSIZE]; 1630static WL childs [EV_PID_HASHSIZE];
853 1631
854#ifndef _WIN32
855
856static ev_signal childev; 1632static ev_signal childev;
857 1633
858void inline_speed 1634#ifndef WIFCONTINUED
1635# define WIFCONTINUED(status) 0
1636#endif
1637
1638/* handle a single child status event */
1639inline_speed void
859child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1640child_reap (EV_P_ int chain, int pid, int status)
860{ 1641{
861 ev_child *w; 1642 ev_child *w;
1643 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
862 1644
863 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1645 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1646 {
864 if (w->pid == pid || !w->pid) 1647 if ((w->pid == pid || !w->pid)
1648 && (!traced || (w->flags & 1)))
865 { 1649 {
866 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1650 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
867 w->rpid = pid; 1651 w->rpid = pid;
868 w->rstatus = status; 1652 w->rstatus = status;
869 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1653 ev_feed_event (EV_A_ (W)w, EV_CHILD);
870 } 1654 }
1655 }
871} 1656}
872 1657
873#ifndef WCONTINUED 1658#ifndef WCONTINUED
874# define WCONTINUED 0 1659# define WCONTINUED 0
875#endif 1660#endif
876 1661
1662/* called on sigchld etc., calls waitpid */
877static void 1663static void
878childcb (EV_P_ ev_signal *sw, int revents) 1664childcb (EV_P_ ev_signal *sw, int revents)
879{ 1665{
880 int pid, status; 1666 int pid, status;
881 1667
… …
884 if (!WCONTINUED 1670 if (!WCONTINUED
885 || errno != EINVAL 1671 || errno != EINVAL
886 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1672 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
887 return; 1673 return;
888 1674
889 /* make sure we are called again until all childs have been reaped */ 1675 /* make sure we are called again until all children have been reaped */
890 /* we need to do it this way so that the callback gets called before we continue */ 1676 /* we need to do it this way so that the callback gets called before we continue */
891 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1677 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
892 1678
893 child_reap (EV_A_ sw, pid, pid, status); 1679 child_reap (EV_A_ pid, pid, status);
894 if (EV_PID_HASHSIZE > 1) 1680 if ((EV_PID_HASHSIZE) > 1)
895 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1681 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
896} 1682}
897 1683
898#endif 1684#endif
899 1685
900/*****************************************************************************/ 1686/*****************************************************************************/
901 1687
1688#if EV_USE_IOCP
1689# include "ev_iocp.c"
1690#endif
902#if EV_USE_PORT 1691#if EV_USE_PORT
903# include "ev_port.c" 1692# include "ev_port.c"
904#endif 1693#endif
905#if EV_USE_KQUEUE 1694#if EV_USE_KQUEUE
906# include "ev_kqueue.c" 1695# include "ev_kqueue.c"
… …
913#endif 1702#endif
914#if EV_USE_SELECT 1703#if EV_USE_SELECT
915# include "ev_select.c" 1704# include "ev_select.c"
916#endif 1705#endif
917 1706
918int 1707int ecb_cold
919ev_version_major (void) 1708ev_version_major (void)
920{ 1709{
921 return EV_VERSION_MAJOR; 1710 return EV_VERSION_MAJOR;
922} 1711}
923 1712
924int 1713int ecb_cold
925ev_version_minor (void) 1714ev_version_minor (void)
926{ 1715{
927 return EV_VERSION_MINOR; 1716 return EV_VERSION_MINOR;
928} 1717}
929 1718
930/* return true if we are running with elevated privileges and should ignore env variables */ 1719/* return true if we are running with elevated privileges and should ignore env variables */
931int inline_size 1720int inline_size ecb_cold
932enable_secure (void) 1721enable_secure (void)
933{ 1722{
934#ifdef _WIN32 1723#ifdef _WIN32
935 return 0; 1724 return 0;
936#else 1725#else
937 return getuid () != geteuid () 1726 return getuid () != geteuid ()
938 || getgid () != getegid (); 1727 || getgid () != getegid ();
939#endif 1728#endif
940} 1729}
941 1730
942unsigned int 1731unsigned int ecb_cold
943ev_supported_backends (void) 1732ev_supported_backends (void)
944{ 1733{
945 unsigned int flags = 0; 1734 unsigned int flags = 0;
946 1735
947 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1736 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
951 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1740 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
952 1741
953 return flags; 1742 return flags;
954} 1743}
955 1744
956unsigned int 1745unsigned int ecb_cold
957ev_recommended_backends (void) 1746ev_recommended_backends (void)
958{ 1747{
959 unsigned int flags = ev_supported_backends (); 1748 unsigned int flags = ev_supported_backends ();
960 1749
961#ifndef __NetBSD__ 1750#ifndef __NetBSD__
962 /* kqueue is borked on everything but netbsd apparently */ 1751 /* kqueue is borked on everything but netbsd apparently */
963 /* it usually doesn't work correctly on anything but sockets and pipes */ 1752 /* it usually doesn't work correctly on anything but sockets and pipes */
964 flags &= ~EVBACKEND_KQUEUE; 1753 flags &= ~EVBACKEND_KQUEUE;
965#endif 1754#endif
966#ifdef __APPLE__ 1755#ifdef __APPLE__
967 // flags &= ~EVBACKEND_KQUEUE; for documentation 1756 /* only select works correctly on that "unix-certified" platform */
968 flags &= ~EVBACKEND_POLL; 1757 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1758 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1759#endif
1760#ifdef __FreeBSD__
1761 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
969#endif 1762#endif
970 1763
971 return flags; 1764 return flags;
972} 1765}
973 1766
974unsigned int 1767unsigned int ecb_cold
975ev_embeddable_backends (void) 1768ev_embeddable_backends (void)
976{ 1769{
977 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1770 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
978 1771
979 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1772 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
980 /* please fix it and tell me how to detect the fix */ 1773 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
981 flags &= ~EVBACKEND_EPOLL; 1774 flags &= ~EVBACKEND_EPOLL;
982
983#ifdef __APPLE__
984 /* is there anything thats not broken on darwin? */
985 flags &= ~EVBACKEND_KQUEUE;
986#endif
987 1775
988 return flags; 1776 return flags;
989} 1777}
990 1778
991unsigned int 1779unsigned int
992ev_backend (EV_P) 1780ev_backend (EV_P)
993{ 1781{
994 return backend; 1782 return backend;
995} 1783}
996 1784
1785#if EV_FEATURE_API
997unsigned int 1786unsigned int
998ev_loop_count (EV_P) 1787ev_iteration (EV_P)
999{ 1788{
1000 return loop_count; 1789 return loop_count;
1790}
1791
1792unsigned int
1793ev_depth (EV_P)
1794{
1795 return loop_depth;
1001} 1796}
1002 1797
1003void 1798void
1004ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 1799ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1005{ 1800{
… …
1010ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 1805ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1011{ 1806{
1012 timeout_blocktime = interval; 1807 timeout_blocktime = interval;
1013} 1808}
1014 1809
1810void
1811ev_set_userdata (EV_P_ void *data)
1812{
1813 userdata = data;
1814}
1815
1816void *
1817ev_userdata (EV_P)
1818{
1819 return userdata;
1820}
1821
1822void
1823ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1824{
1825 invoke_cb = invoke_pending_cb;
1826}
1827
1828void
1829ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1830{
1831 release_cb = release;
1832 acquire_cb = acquire;
1833}
1834#endif
1835
1836/* initialise a loop structure, must be zero-initialised */
1015static void noinline 1837static void noinline ecb_cold
1016loop_init (EV_P_ unsigned int flags) 1838loop_init (EV_P_ unsigned int flags)
1017{ 1839{
1018 if (!backend) 1840 if (!backend)
1019 { 1841 {
1842 origflags = flags;
1843
1844#if EV_USE_REALTIME
1845 if (!have_realtime)
1846 {
1847 struct timespec ts;
1848
1849 if (!clock_gettime (CLOCK_REALTIME, &ts))
1850 have_realtime = 1;
1851 }
1852#endif
1853
1020#if EV_USE_MONOTONIC 1854#if EV_USE_MONOTONIC
1855 if (!have_monotonic)
1021 { 1856 {
1022 struct timespec ts; 1857 struct timespec ts;
1858
1023 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1859 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1024 have_monotonic = 1; 1860 have_monotonic = 1;
1025 } 1861 }
1026#endif 1862#endif
1027
1028 ev_rt_now = ev_time ();
1029 mn_now = get_clock ();
1030 now_floor = mn_now;
1031 rtmn_diff = ev_rt_now - mn_now;
1032
1033 io_blocktime = 0.;
1034 timeout_blocktime = 0.;
1035 1863
1036 /* pid check not overridable via env */ 1864 /* pid check not overridable via env */
1037#ifndef _WIN32 1865#ifndef _WIN32
1038 if (flags & EVFLAG_FORKCHECK) 1866 if (flags & EVFLAG_FORKCHECK)
1039 curpid = getpid (); 1867 curpid = getpid ();
… …
1042 if (!(flags & EVFLAG_NOENV) 1870 if (!(flags & EVFLAG_NOENV)
1043 && !enable_secure () 1871 && !enable_secure ()
1044 && getenv ("LIBEV_FLAGS")) 1872 && getenv ("LIBEV_FLAGS"))
1045 flags = atoi (getenv ("LIBEV_FLAGS")); 1873 flags = atoi (getenv ("LIBEV_FLAGS"));
1046 1874
1047 if (!(flags & 0x0000ffffUL)) 1875 ev_rt_now = ev_time ();
1876 mn_now = get_clock ();
1877 now_floor = mn_now;
1878 rtmn_diff = ev_rt_now - mn_now;
1879#if EV_FEATURE_API
1880 invoke_cb = ev_invoke_pending;
1881#endif
1882
1883 io_blocktime = 0.;
1884 timeout_blocktime = 0.;
1885 backend = 0;
1886 backend_fd = -1;
1887 sig_pending = 0;
1888#if EV_ASYNC_ENABLE
1889 async_pending = 0;
1890#endif
1891 pipe_write_skipped = 0;
1892 pipe_write_wanted = 0;
1893#if EV_USE_INOTIFY
1894 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1895#endif
1896#if EV_USE_SIGNALFD
1897 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1898#endif
1899
1900 if (!(flags & EVBACKEND_MASK))
1048 flags |= ev_recommended_backends (); 1901 flags |= ev_recommended_backends ();
1049 1902
1050 backend = 0;
1051 backend_fd = -1;
1052#if EV_USE_INOTIFY 1903#if EV_USE_IOCP
1053 fs_fd = -2; 1904 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1054#endif 1905#endif
1055
1056#if EV_USE_PORT 1906#if EV_USE_PORT
1057 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1907 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1058#endif 1908#endif
1059#if EV_USE_KQUEUE 1909#if EV_USE_KQUEUE
1060 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1910 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1067#endif 1917#endif
1068#if EV_USE_SELECT 1918#if EV_USE_SELECT
1069 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1919 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1070#endif 1920#endif
1071 1921
1922 ev_prepare_init (&pending_w, pendingcb);
1923
1924#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1072 ev_init (&sigev, sigcb); 1925 ev_init (&pipe_w, pipecb);
1073 ev_set_priority (&sigev, EV_MAXPRI); 1926 ev_set_priority (&pipe_w, EV_MAXPRI);
1927#endif
1074 } 1928 }
1075} 1929}
1076 1930
1077static void noinline 1931/* free up a loop structure */
1932void ecb_cold
1078loop_destroy (EV_P) 1933ev_loop_destroy (EV_P)
1079{ 1934{
1080 int i; 1935 int i;
1936
1937#if EV_MULTIPLICITY
1938 /* mimic free (0) */
1939 if (!EV_A)
1940 return;
1941#endif
1942
1943#if EV_CLEANUP_ENABLE
1944 /* queue cleanup watchers (and execute them) */
1945 if (expect_false (cleanupcnt))
1946 {
1947 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1948 EV_INVOKE_PENDING;
1949 }
1950#endif
1951
1952#if EV_CHILD_ENABLE
1953 if (ev_is_active (&childev))
1954 {
1955 ev_ref (EV_A); /* child watcher */
1956 ev_signal_stop (EV_A_ &childev);
1957 }
1958#endif
1959
1960 if (ev_is_active (&pipe_w))
1961 {
1962 /*ev_ref (EV_A);*/
1963 /*ev_io_stop (EV_A_ &pipe_w);*/
1964
1965#if EV_USE_EVENTFD
1966 if (evfd >= 0)
1967 close (evfd);
1968#endif
1969
1970 if (evpipe [0] >= 0)
1971 {
1972 EV_WIN32_CLOSE_FD (evpipe [0]);
1973 EV_WIN32_CLOSE_FD (evpipe [1]);
1974 }
1975 }
1976
1977#if EV_USE_SIGNALFD
1978 if (ev_is_active (&sigfd_w))
1979 close (sigfd);
1980#endif
1081 1981
1082#if EV_USE_INOTIFY 1982#if EV_USE_INOTIFY
1083 if (fs_fd >= 0) 1983 if (fs_fd >= 0)
1084 close (fs_fd); 1984 close (fs_fd);
1085#endif 1985#endif
1086 1986
1087 if (backend_fd >= 0) 1987 if (backend_fd >= 0)
1088 close (backend_fd); 1988 close (backend_fd);
1089 1989
1990#if EV_USE_IOCP
1991 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1992#endif
1090#if EV_USE_PORT 1993#if EV_USE_PORT
1091 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1994 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1092#endif 1995#endif
1093#if EV_USE_KQUEUE 1996#if EV_USE_KQUEUE
1094 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1997 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1109#if EV_IDLE_ENABLE 2012#if EV_IDLE_ENABLE
1110 array_free (idle, [i]); 2013 array_free (idle, [i]);
1111#endif 2014#endif
1112 } 2015 }
1113 2016
1114 ev_free (anfds); anfdmax = 0; 2017 ev_free (anfds); anfds = 0; anfdmax = 0;
1115 2018
1116 /* have to use the microsoft-never-gets-it-right macro */ 2019 /* have to use the microsoft-never-gets-it-right macro */
2020 array_free (rfeed, EMPTY);
1117 array_free (fdchange, EMPTY); 2021 array_free (fdchange, EMPTY);
1118 array_free (timer, EMPTY); 2022 array_free (timer, EMPTY);
1119#if EV_PERIODIC_ENABLE 2023#if EV_PERIODIC_ENABLE
1120 array_free (periodic, EMPTY); 2024 array_free (periodic, EMPTY);
1121#endif 2025#endif
1122#if EV_FORK_ENABLE 2026#if EV_FORK_ENABLE
1123 array_free (fork, EMPTY); 2027 array_free (fork, EMPTY);
1124#endif 2028#endif
2029#if EV_CLEANUP_ENABLE
2030 array_free (cleanup, EMPTY);
2031#endif
1125 array_free (prepare, EMPTY); 2032 array_free (prepare, EMPTY);
1126 array_free (check, EMPTY); 2033 array_free (check, EMPTY);
2034#if EV_ASYNC_ENABLE
2035 array_free (async, EMPTY);
2036#endif
1127 2037
1128 backend = 0; 2038 backend = 0;
1129}
1130 2039
2040#if EV_MULTIPLICITY
2041 if (ev_is_default_loop (EV_A))
2042#endif
2043 ev_default_loop_ptr = 0;
2044#if EV_MULTIPLICITY
2045 else
2046 ev_free (EV_A);
2047#endif
2048}
2049
2050#if EV_USE_INOTIFY
1131void inline_size infy_fork (EV_P); 2051inline_size void infy_fork (EV_P);
2052#endif
1132 2053
1133void inline_size 2054inline_size void
1134loop_fork (EV_P) 2055loop_fork (EV_P)
1135{ 2056{
1136#if EV_USE_PORT 2057#if EV_USE_PORT
1137 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2058 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1138#endif 2059#endif
… …
1144#endif 2065#endif
1145#if EV_USE_INOTIFY 2066#if EV_USE_INOTIFY
1146 infy_fork (EV_A); 2067 infy_fork (EV_A);
1147#endif 2068#endif
1148 2069
1149 if (ev_is_active (&sigev)) 2070 if (ev_is_active (&pipe_w))
1150 { 2071 {
1151 /* default loop */ 2072 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1152 2073
1153 ev_ref (EV_A); 2074 ev_ref (EV_A);
1154 ev_io_stop (EV_A_ &sigev); 2075 ev_io_stop (EV_A_ &pipe_w);
1155 close (sigpipe [0]);
1156 close (sigpipe [1]);
1157 2076
1158 while (pipe (sigpipe)) 2077#if EV_USE_EVENTFD
1159 syserr ("(libev) error creating pipe"); 2078 if (evfd >= 0)
2079 close (evfd);
2080#endif
1160 2081
2082 if (evpipe [0] >= 0)
2083 {
2084 EV_WIN32_CLOSE_FD (evpipe [0]);
2085 EV_WIN32_CLOSE_FD (evpipe [1]);
2086 }
2087
2088#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1161 siginit (EV_A); 2089 evpipe_init (EV_A);
2090 /* now iterate over everything, in case we missed something */
2091 pipecb (EV_A_ &pipe_w, EV_READ);
2092#endif
1162 } 2093 }
1163 2094
1164 postfork = 0; 2095 postfork = 0;
1165} 2096}
1166 2097
1167#if EV_MULTIPLICITY 2098#if EV_MULTIPLICITY
2099
1168struct ev_loop * 2100struct ev_loop * ecb_cold
1169ev_loop_new (unsigned int flags) 2101ev_loop_new (unsigned int flags)
1170{ 2102{
1171 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2103 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1172 2104
1173 memset (loop, 0, sizeof (struct ev_loop)); 2105 memset (EV_A, 0, sizeof (struct ev_loop));
1174
1175 loop_init (EV_A_ flags); 2106 loop_init (EV_A_ flags);
1176 2107
1177 if (ev_backend (EV_A)) 2108 if (ev_backend (EV_A))
1178 return loop; 2109 return EV_A;
1179 2110
2111 ev_free (EV_A);
1180 return 0; 2112 return 0;
1181} 2113}
1182 2114
1183void 2115#endif /* multiplicity */
1184ev_loop_destroy (EV_P)
1185{
1186 loop_destroy (EV_A);
1187 ev_free (loop);
1188}
1189 2116
1190void 2117#if EV_VERIFY
1191ev_loop_fork (EV_P) 2118static void noinline ecb_cold
2119verify_watcher (EV_P_ W w)
1192{ 2120{
1193 postfork = 1; 2121 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1194}
1195 2122
2123 if (w->pending)
2124 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2125}
2126
2127static void noinline ecb_cold
2128verify_heap (EV_P_ ANHE *heap, int N)
2129{
2130 int i;
2131
2132 for (i = HEAP0; i < N + HEAP0; ++i)
2133 {
2134 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2135 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2136 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2137
2138 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2139 }
2140}
2141
2142static void noinline ecb_cold
2143array_verify (EV_P_ W *ws, int cnt)
2144{
2145 while (cnt--)
2146 {
2147 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2148 verify_watcher (EV_A_ ws [cnt]);
2149 }
2150}
2151#endif
2152
2153#if EV_FEATURE_API
2154void ecb_cold
2155ev_verify (EV_P)
2156{
2157#if EV_VERIFY
2158 int i;
2159 WL w;
2160
2161 assert (activecnt >= -1);
2162
2163 assert (fdchangemax >= fdchangecnt);
2164 for (i = 0; i < fdchangecnt; ++i)
2165 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2166
2167 assert (anfdmax >= 0);
2168 for (i = 0; i < anfdmax; ++i)
2169 for (w = anfds [i].head; w; w = w->next)
2170 {
2171 verify_watcher (EV_A_ (W)w);
2172 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2173 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2174 }
2175
2176 assert (timermax >= timercnt);
2177 verify_heap (EV_A_ timers, timercnt);
2178
2179#if EV_PERIODIC_ENABLE
2180 assert (periodicmax >= periodiccnt);
2181 verify_heap (EV_A_ periodics, periodiccnt);
2182#endif
2183
2184 for (i = NUMPRI; i--; )
2185 {
2186 assert (pendingmax [i] >= pendingcnt [i]);
2187#if EV_IDLE_ENABLE
2188 assert (idleall >= 0);
2189 assert (idlemax [i] >= idlecnt [i]);
2190 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2191#endif
2192 }
2193
2194#if EV_FORK_ENABLE
2195 assert (forkmax >= forkcnt);
2196 array_verify (EV_A_ (W *)forks, forkcnt);
2197#endif
2198
2199#if EV_CLEANUP_ENABLE
2200 assert (cleanupmax >= cleanupcnt);
2201 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2202#endif
2203
2204#if EV_ASYNC_ENABLE
2205 assert (asyncmax >= asynccnt);
2206 array_verify (EV_A_ (W *)asyncs, asynccnt);
2207#endif
2208
2209#if EV_PREPARE_ENABLE
2210 assert (preparemax >= preparecnt);
2211 array_verify (EV_A_ (W *)prepares, preparecnt);
2212#endif
2213
2214#if EV_CHECK_ENABLE
2215 assert (checkmax >= checkcnt);
2216 array_verify (EV_A_ (W *)checks, checkcnt);
2217#endif
2218
2219# if 0
2220#if EV_CHILD_ENABLE
2221 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2222 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2223#endif
2224# endif
2225#endif
2226}
1196#endif 2227#endif
1197 2228
1198#if EV_MULTIPLICITY 2229#if EV_MULTIPLICITY
1199struct ev_loop * 2230struct ev_loop * ecb_cold
1200ev_default_loop_init (unsigned int flags)
1201#else 2231#else
1202int 2232int
2233#endif
1203ev_default_loop (unsigned int flags) 2234ev_default_loop (unsigned int flags)
1204#endif
1205{ 2235{
1206 if (sigpipe [0] == sigpipe [1])
1207 if (pipe (sigpipe))
1208 return 0;
1209
1210 if (!ev_default_loop_ptr) 2236 if (!ev_default_loop_ptr)
1211 { 2237 {
1212#if EV_MULTIPLICITY 2238#if EV_MULTIPLICITY
1213 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2239 EV_P = ev_default_loop_ptr = &default_loop_struct;
1214#else 2240#else
1215 ev_default_loop_ptr = 1; 2241 ev_default_loop_ptr = 1;
1216#endif 2242#endif
1217 2243
1218 loop_init (EV_A_ flags); 2244 loop_init (EV_A_ flags);
1219 2245
1220 if (ev_backend (EV_A)) 2246 if (ev_backend (EV_A))
1221 { 2247 {
1222 siginit (EV_A); 2248#if EV_CHILD_ENABLE
1223
1224#ifndef _WIN32
1225 ev_signal_init (&childev, childcb, SIGCHLD); 2249 ev_signal_init (&childev, childcb, SIGCHLD);
1226 ev_set_priority (&childev, EV_MAXPRI); 2250 ev_set_priority (&childev, EV_MAXPRI);
1227 ev_signal_start (EV_A_ &childev); 2251 ev_signal_start (EV_A_ &childev);
1228 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2252 ev_unref (EV_A); /* child watcher should not keep loop alive */
1229#endif 2253#endif
… …
1234 2258
1235 return ev_default_loop_ptr; 2259 return ev_default_loop_ptr;
1236} 2260}
1237 2261
1238void 2262void
1239ev_default_destroy (void) 2263ev_loop_fork (EV_P)
1240{ 2264{
1241#if EV_MULTIPLICITY 2265 postfork = 1; /* must be in line with ev_default_fork */
1242 struct ev_loop *loop = ev_default_loop_ptr;
1243#endif
1244
1245#ifndef _WIN32
1246 ev_ref (EV_A); /* child watcher */
1247 ev_signal_stop (EV_A_ &childev);
1248#endif
1249
1250 ev_ref (EV_A); /* signal watcher */
1251 ev_io_stop (EV_A_ &sigev);
1252
1253 close (sigpipe [0]); sigpipe [0] = 0;
1254 close (sigpipe [1]); sigpipe [1] = 0;
1255
1256 loop_destroy (EV_A);
1257}
1258
1259void
1260ev_default_fork (void)
1261{
1262#if EV_MULTIPLICITY
1263 struct ev_loop *loop = ev_default_loop_ptr;
1264#endif
1265
1266 if (backend)
1267 postfork = 1;
1268} 2266}
1269 2267
1270/*****************************************************************************/ 2268/*****************************************************************************/
1271 2269
1272void 2270void
1273ev_invoke (EV_P_ void *w, int revents) 2271ev_invoke (EV_P_ void *w, int revents)
1274{ 2272{
1275 EV_CB_INVOKE ((W)w, revents); 2273 EV_CB_INVOKE ((W)w, revents);
1276} 2274}
1277 2275
1278void inline_speed 2276unsigned int
1279call_pending (EV_P) 2277ev_pending_count (EV_P)
2278{
2279 int pri;
2280 unsigned int count = 0;
2281
2282 for (pri = NUMPRI; pri--; )
2283 count += pendingcnt [pri];
2284
2285 return count;
2286}
2287
2288void noinline
2289ev_invoke_pending (EV_P)
1280{ 2290{
1281 int pri; 2291 int pri;
1282 2292
1283 for (pri = NUMPRI; pri--; ) 2293 for (pri = NUMPRI; pri--; )
1284 while (pendingcnt [pri]) 2294 while (pendingcnt [pri])
1285 { 2295 {
1286 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2296 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1287 2297
1288 if (expect_true (p->w))
1289 {
1290 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1291
1292 p->w->pending = 0; 2298 p->w->pending = 0;
1293 EV_CB_INVOKE (p->w, p->events); 2299 EV_CB_INVOKE (p->w, p->events);
1294 } 2300 EV_FREQUENT_CHECK;
1295 } 2301 }
1296} 2302}
1297 2303
1298void inline_size
1299timers_reify (EV_P)
1300{
1301 while (timercnt && ((WT)timers [0])->at <= mn_now)
1302 {
1303 ev_timer *w = (ev_timer *)timers [0];
1304
1305 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1306
1307 /* first reschedule or stop timer */
1308 if (w->repeat)
1309 {
1310 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1311
1312 ((WT)w)->at += w->repeat;
1313 if (((WT)w)->at < mn_now)
1314 ((WT)w)->at = mn_now;
1315
1316 downheap (timers, timercnt, 0);
1317 }
1318 else
1319 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1320
1321 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1322 }
1323}
1324
1325#if EV_PERIODIC_ENABLE
1326void inline_size
1327periodics_reify (EV_P)
1328{
1329 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1330 {
1331 ev_periodic *w = (ev_periodic *)periodics [0];
1332
1333 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1334
1335 /* first reschedule or stop timer */
1336 if (w->reschedule_cb)
1337 {
1338 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1339 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1340 downheap (periodics, periodiccnt, 0);
1341 }
1342 else if (w->interval)
1343 {
1344 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1345 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1346 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1347 downheap (periodics, periodiccnt, 0);
1348 }
1349 else
1350 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1351
1352 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1353 }
1354}
1355
1356static void noinline
1357periodics_reschedule (EV_P)
1358{
1359 int i;
1360
1361 /* adjust periodics after time jump */
1362 for (i = 0; i < periodiccnt; ++i)
1363 {
1364 ev_periodic *w = (ev_periodic *)periodics [i];
1365
1366 if (w->reschedule_cb)
1367 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1368 else if (w->interval)
1369 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1370 }
1371
1372 /* now rebuild the heap */
1373 for (i = periodiccnt >> 1; i--; )
1374 downheap (periodics, periodiccnt, i);
1375}
1376#endif
1377
1378#if EV_IDLE_ENABLE 2304#if EV_IDLE_ENABLE
1379void inline_size 2305/* make idle watchers pending. this handles the "call-idle */
2306/* only when higher priorities are idle" logic */
2307inline_size void
1380idle_reify (EV_P) 2308idle_reify (EV_P)
1381{ 2309{
1382 if (expect_false (idleall)) 2310 if (expect_false (idleall))
1383 { 2311 {
1384 int pri; 2312 int pri;
… …
1396 } 2324 }
1397 } 2325 }
1398} 2326}
1399#endif 2327#endif
1400 2328
1401void inline_speed 2329/* make timers pending */
2330inline_size void
2331timers_reify (EV_P)
2332{
2333 EV_FREQUENT_CHECK;
2334
2335 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2336 {
2337 do
2338 {
2339 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2340
2341 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2342
2343 /* first reschedule or stop timer */
2344 if (w->repeat)
2345 {
2346 ev_at (w) += w->repeat;
2347 if (ev_at (w) < mn_now)
2348 ev_at (w) = mn_now;
2349
2350 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2351
2352 ANHE_at_cache (timers [HEAP0]);
2353 downheap (timers, timercnt, HEAP0);
2354 }
2355 else
2356 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2357
2358 EV_FREQUENT_CHECK;
2359 feed_reverse (EV_A_ (W)w);
2360 }
2361 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2362
2363 feed_reverse_done (EV_A_ EV_TIMER);
2364 }
2365}
2366
2367#if EV_PERIODIC_ENABLE
2368
2369static void noinline
2370periodic_recalc (EV_P_ ev_periodic *w)
2371{
2372 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2373 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2374
2375 /* the above almost always errs on the low side */
2376 while (at <= ev_rt_now)
2377 {
2378 ev_tstamp nat = at + w->interval;
2379
2380 /* when resolution fails us, we use ev_rt_now */
2381 if (expect_false (nat == at))
2382 {
2383 at = ev_rt_now;
2384 break;
2385 }
2386
2387 at = nat;
2388 }
2389
2390 ev_at (w) = at;
2391}
2392
2393/* make periodics pending */
2394inline_size void
2395periodics_reify (EV_P)
2396{
2397 EV_FREQUENT_CHECK;
2398
2399 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2400 {
2401 int feed_count = 0;
2402
2403 do
2404 {
2405 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2406
2407 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2408
2409 /* first reschedule or stop timer */
2410 if (w->reschedule_cb)
2411 {
2412 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2413
2414 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2415
2416 ANHE_at_cache (periodics [HEAP0]);
2417 downheap (periodics, periodiccnt, HEAP0);
2418 }
2419 else if (w->interval)
2420 {
2421 periodic_recalc (EV_A_ w);
2422 ANHE_at_cache (periodics [HEAP0]);
2423 downheap (periodics, periodiccnt, HEAP0);
2424 }
2425 else
2426 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2427
2428 EV_FREQUENT_CHECK;
2429 feed_reverse (EV_A_ (W)w);
2430 }
2431 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2432
2433 feed_reverse_done (EV_A_ EV_PERIODIC);
2434 }
2435}
2436
2437/* simply recalculate all periodics */
2438/* TODO: maybe ensure that at least one event happens when jumping forward? */
2439static void noinline ecb_cold
2440periodics_reschedule (EV_P)
2441{
2442 int i;
2443
2444 /* adjust periodics after time jump */
2445 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2446 {
2447 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2448
2449 if (w->reschedule_cb)
2450 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2451 else if (w->interval)
2452 periodic_recalc (EV_A_ w);
2453
2454 ANHE_at_cache (periodics [i]);
2455 }
2456
2457 reheap (periodics, periodiccnt);
2458}
2459#endif
2460
2461/* adjust all timers by a given offset */
2462static void noinline ecb_cold
2463timers_reschedule (EV_P_ ev_tstamp adjust)
2464{
2465 int i;
2466
2467 for (i = 0; i < timercnt; ++i)
2468 {
2469 ANHE *he = timers + i + HEAP0;
2470 ANHE_w (*he)->at += adjust;
2471 ANHE_at_cache (*he);
2472 }
2473}
2474
2475/* fetch new monotonic and realtime times from the kernel */
2476/* also detect if there was a timejump, and act accordingly */
2477inline_speed void
1402time_update (EV_P_ ev_tstamp max_block) 2478time_update (EV_P_ ev_tstamp max_block)
1403{ 2479{
1404 int i;
1405
1406#if EV_USE_MONOTONIC 2480#if EV_USE_MONOTONIC
1407 if (expect_true (have_monotonic)) 2481 if (expect_true (have_monotonic))
1408 { 2482 {
2483 int i;
1409 ev_tstamp odiff = rtmn_diff; 2484 ev_tstamp odiff = rtmn_diff;
1410 2485
1411 mn_now = get_clock (); 2486 mn_now = get_clock ();
1412 2487
1413 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2488 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1429 * doesn't hurt either as we only do this on time-jumps or 2504 * doesn't hurt either as we only do this on time-jumps or
1430 * in the unlikely event of having been preempted here. 2505 * in the unlikely event of having been preempted here.
1431 */ 2506 */
1432 for (i = 4; --i; ) 2507 for (i = 4; --i; )
1433 { 2508 {
2509 ev_tstamp diff;
1434 rtmn_diff = ev_rt_now - mn_now; 2510 rtmn_diff = ev_rt_now - mn_now;
1435 2511
1436 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2512 diff = odiff - rtmn_diff;
2513
2514 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1437 return; /* all is well */ 2515 return; /* all is well */
1438 2516
1439 ev_rt_now = ev_time (); 2517 ev_rt_now = ev_time ();
1440 mn_now = get_clock (); 2518 mn_now = get_clock ();
1441 now_floor = mn_now; 2519 now_floor = mn_now;
1442 } 2520 }
1443 2521
2522 /* no timer adjustment, as the monotonic clock doesn't jump */
2523 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1444# if EV_PERIODIC_ENABLE 2524# if EV_PERIODIC_ENABLE
1445 periodics_reschedule (EV_A); 2525 periodics_reschedule (EV_A);
1446# endif 2526# endif
1447 /* no timer adjustment, as the monotonic clock doesn't jump */
1448 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1449 } 2527 }
1450 else 2528 else
1451#endif 2529#endif
1452 { 2530 {
1453 ev_rt_now = ev_time (); 2531 ev_rt_now = ev_time ();
1454 2532
1455 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2533 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1456 { 2534 {
2535 /* adjust timers. this is easy, as the offset is the same for all of them */
2536 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1457#if EV_PERIODIC_ENABLE 2537#if EV_PERIODIC_ENABLE
1458 periodics_reschedule (EV_A); 2538 periodics_reschedule (EV_A);
1459#endif 2539#endif
1460 /* adjust timers. this is easy, as the offset is the same for all of them */
1461 for (i = 0; i < timercnt; ++i)
1462 ((WT)timers [i])->at += ev_rt_now - mn_now;
1463 } 2540 }
1464 2541
1465 mn_now = ev_rt_now; 2542 mn_now = ev_rt_now;
1466 } 2543 }
1467} 2544}
1468 2545
1469void 2546void
1470ev_ref (EV_P)
1471{
1472 ++activecnt;
1473}
1474
1475void
1476ev_unref (EV_P)
1477{
1478 --activecnt;
1479}
1480
1481static int loop_done;
1482
1483void
1484ev_loop (EV_P_ int flags) 2547ev_run (EV_P_ int flags)
1485{ 2548{
1486 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2549#if EV_FEATURE_API
1487 ? EVUNLOOP_ONE 2550 ++loop_depth;
1488 : EVUNLOOP_CANCEL; 2551#endif
1489 2552
2553 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2554
2555 loop_done = EVBREAK_CANCEL;
2556
1490 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2557 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1491 2558
1492 do 2559 do
1493 { 2560 {
2561#if EV_VERIFY >= 2
2562 ev_verify (EV_A);
2563#endif
2564
1494#ifndef _WIN32 2565#ifndef _WIN32
1495 if (expect_false (curpid)) /* penalise the forking check even more */ 2566 if (expect_false (curpid)) /* penalise the forking check even more */
1496 if (expect_false (getpid () != curpid)) 2567 if (expect_false (getpid () != curpid))
1497 { 2568 {
1498 curpid = getpid (); 2569 curpid = getpid ();
… …
1504 /* we might have forked, so queue fork handlers */ 2575 /* we might have forked, so queue fork handlers */
1505 if (expect_false (postfork)) 2576 if (expect_false (postfork))
1506 if (forkcnt) 2577 if (forkcnt)
1507 { 2578 {
1508 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2579 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1509 call_pending (EV_A); 2580 EV_INVOKE_PENDING;
1510 } 2581 }
1511#endif 2582#endif
1512 2583
2584#if EV_PREPARE_ENABLE
1513 /* queue prepare watchers (and execute them) */ 2585 /* queue prepare watchers (and execute them) */
1514 if (expect_false (preparecnt)) 2586 if (expect_false (preparecnt))
1515 { 2587 {
1516 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2588 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1517 call_pending (EV_A); 2589 EV_INVOKE_PENDING;
1518 } 2590 }
2591#endif
1519 2592
1520 if (expect_false (!activecnt)) 2593 if (expect_false (loop_done))
1521 break; 2594 break;
1522 2595
1523 /* we might have forked, so reify kernel state if necessary */ 2596 /* we might have forked, so reify kernel state if necessary */
1524 if (expect_false (postfork)) 2597 if (expect_false (postfork))
1525 loop_fork (EV_A); 2598 loop_fork (EV_A);
… …
1530 /* calculate blocking time */ 2603 /* calculate blocking time */
1531 { 2604 {
1532 ev_tstamp waittime = 0.; 2605 ev_tstamp waittime = 0.;
1533 ev_tstamp sleeptime = 0.; 2606 ev_tstamp sleeptime = 0.;
1534 2607
2608 /* remember old timestamp for io_blocktime calculation */
2609 ev_tstamp prev_mn_now = mn_now;
2610
2611 /* update time to cancel out callback processing overhead */
2612 time_update (EV_A_ 1e100);
2613
2614 /* from now on, we want a pipe-wake-up */
2615 pipe_write_wanted = 1;
2616
2617 ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
2618
1535 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2619 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1536 { 2620 {
1537 /* update time to cancel out callback processing overhead */
1538 time_update (EV_A_ 1e100);
1539
1540 waittime = MAX_BLOCKTIME; 2621 waittime = MAX_BLOCKTIME;
1541 2622
1542 if (timercnt) 2623 if (timercnt)
1543 { 2624 {
1544 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2625 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1545 if (waittime > to) waittime = to; 2626 if (waittime > to) waittime = to;
1546 } 2627 }
1547 2628
1548#if EV_PERIODIC_ENABLE 2629#if EV_PERIODIC_ENABLE
1549 if (periodiccnt) 2630 if (periodiccnt)
1550 { 2631 {
1551 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2632 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1552 if (waittime > to) waittime = to; 2633 if (waittime > to) waittime = to;
1553 } 2634 }
1554#endif 2635#endif
1555 2636
2637 /* don't let timeouts decrease the waittime below timeout_blocktime */
1556 if (expect_false (waittime < timeout_blocktime)) 2638 if (expect_false (waittime < timeout_blocktime))
1557 waittime = timeout_blocktime; 2639 waittime = timeout_blocktime;
1558 2640
1559 sleeptime = waittime - backend_fudge; 2641 /* at this point, we NEED to wait, so we have to ensure */
2642 /* to pass a minimum nonzero value to the backend */
2643 if (expect_false (waittime < backend_mintime))
2644 waittime = backend_mintime;
1560 2645
2646 /* extra check because io_blocktime is commonly 0 */
1561 if (expect_true (sleeptime > io_blocktime)) 2647 if (expect_false (io_blocktime))
1562 sleeptime = io_blocktime;
1563
1564 if (sleeptime)
1565 { 2648 {
2649 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2650
2651 if (sleeptime > waittime - backend_mintime)
2652 sleeptime = waittime - backend_mintime;
2653
2654 if (expect_true (sleeptime > 0.))
2655 {
1566 ev_sleep (sleeptime); 2656 ev_sleep (sleeptime);
1567 waittime -= sleeptime; 2657 waittime -= sleeptime;
2658 }
1568 } 2659 }
1569 } 2660 }
1570 2661
2662#if EV_FEATURE_API
1571 ++loop_count; 2663 ++loop_count;
2664#endif
2665 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1572 backend_poll (EV_A_ waittime); 2666 backend_poll (EV_A_ waittime);
2667 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2668
2669 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2670
2671 if (pipe_write_skipped)
2672 {
2673 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2674 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2675 }
2676
1573 2677
1574 /* update ev_rt_now, do magic */ 2678 /* update ev_rt_now, do magic */
1575 time_update (EV_A_ waittime + sleeptime); 2679 time_update (EV_A_ waittime + sleeptime);
1576 } 2680 }
1577 2681
… …
1584#if EV_IDLE_ENABLE 2688#if EV_IDLE_ENABLE
1585 /* queue idle watchers unless other events are pending */ 2689 /* queue idle watchers unless other events are pending */
1586 idle_reify (EV_A); 2690 idle_reify (EV_A);
1587#endif 2691#endif
1588 2692
2693#if EV_CHECK_ENABLE
1589 /* queue check watchers, to be executed first */ 2694 /* queue check watchers, to be executed first */
1590 if (expect_false (checkcnt)) 2695 if (expect_false (checkcnt))
1591 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2696 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2697#endif
1592 2698
1593 call_pending (EV_A); 2699 EV_INVOKE_PENDING;
1594
1595 } 2700 }
1596 while (expect_true (activecnt && !loop_done)); 2701 while (expect_true (
2702 activecnt
2703 && !loop_done
2704 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2705 ));
1597 2706
1598 if (loop_done == EVUNLOOP_ONE) 2707 if (loop_done == EVBREAK_ONE)
1599 loop_done = EVUNLOOP_CANCEL; 2708 loop_done = EVBREAK_CANCEL;
2709
2710#if EV_FEATURE_API
2711 --loop_depth;
2712#endif
1600} 2713}
1601 2714
1602void 2715void
1603ev_unloop (EV_P_ int how) 2716ev_break (EV_P_ int how)
1604{ 2717{
1605 loop_done = how; 2718 loop_done = how;
1606} 2719}
1607 2720
2721void
2722ev_ref (EV_P)
2723{
2724 ++activecnt;
2725}
2726
2727void
2728ev_unref (EV_P)
2729{
2730 --activecnt;
2731}
2732
2733void
2734ev_now_update (EV_P)
2735{
2736 time_update (EV_A_ 1e100);
2737}
2738
2739void
2740ev_suspend (EV_P)
2741{
2742 ev_now_update (EV_A);
2743}
2744
2745void
2746ev_resume (EV_P)
2747{
2748 ev_tstamp mn_prev = mn_now;
2749
2750 ev_now_update (EV_A);
2751 timers_reschedule (EV_A_ mn_now - mn_prev);
2752#if EV_PERIODIC_ENABLE
2753 /* TODO: really do this? */
2754 periodics_reschedule (EV_A);
2755#endif
2756}
2757
1608/*****************************************************************************/ 2758/*****************************************************************************/
2759/* singly-linked list management, used when the expected list length is short */
1609 2760
1610void inline_size 2761inline_size void
1611wlist_add (WL *head, WL elem) 2762wlist_add (WL *head, WL elem)
1612{ 2763{
1613 elem->next = *head; 2764 elem->next = *head;
1614 *head = elem; 2765 *head = elem;
1615} 2766}
1616 2767
1617void inline_size 2768inline_size void
1618wlist_del (WL *head, WL elem) 2769wlist_del (WL *head, WL elem)
1619{ 2770{
1620 while (*head) 2771 while (*head)
1621 { 2772 {
1622 if (*head == elem) 2773 if (expect_true (*head == elem))
1623 { 2774 {
1624 *head = elem->next; 2775 *head = elem->next;
1625 return; 2776 break;
1626 } 2777 }
1627 2778
1628 head = &(*head)->next; 2779 head = &(*head)->next;
1629 } 2780 }
1630} 2781}
1631 2782
1632void inline_speed 2783/* internal, faster, version of ev_clear_pending */
2784inline_speed void
1633clear_pending (EV_P_ W w) 2785clear_pending (EV_P_ W w)
1634{ 2786{
1635 if (w->pending) 2787 if (w->pending)
1636 { 2788 {
1637 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2789 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1638 w->pending = 0; 2790 w->pending = 0;
1639 } 2791 }
1640} 2792}
1641 2793
1642int 2794int
… …
1646 int pending = w_->pending; 2798 int pending = w_->pending;
1647 2799
1648 if (expect_true (pending)) 2800 if (expect_true (pending))
1649 { 2801 {
1650 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2802 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2803 p->w = (W)&pending_w;
1651 w_->pending = 0; 2804 w_->pending = 0;
1652 p->w = 0;
1653 return p->events; 2805 return p->events;
1654 } 2806 }
1655 else 2807 else
1656 return 0; 2808 return 0;
1657} 2809}
1658 2810
1659void inline_size 2811inline_size void
1660pri_adjust (EV_P_ W w) 2812pri_adjust (EV_P_ W w)
1661{ 2813{
1662 int pri = w->priority; 2814 int pri = ev_priority (w);
1663 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2815 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1664 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2816 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1665 w->priority = pri; 2817 ev_set_priority (w, pri);
1666} 2818}
1667 2819
1668void inline_speed 2820inline_speed void
1669ev_start (EV_P_ W w, int active) 2821ev_start (EV_P_ W w, int active)
1670{ 2822{
1671 pri_adjust (EV_A_ w); 2823 pri_adjust (EV_A_ w);
1672 w->active = active; 2824 w->active = active;
1673 ev_ref (EV_A); 2825 ev_ref (EV_A);
1674} 2826}
1675 2827
1676void inline_size 2828inline_size void
1677ev_stop (EV_P_ W w) 2829ev_stop (EV_P_ W w)
1678{ 2830{
1679 ev_unref (EV_A); 2831 ev_unref (EV_A);
1680 w->active = 0; 2832 w->active = 0;
1681} 2833}
… …
1688 int fd = w->fd; 2840 int fd = w->fd;
1689 2841
1690 if (expect_false (ev_is_active (w))) 2842 if (expect_false (ev_is_active (w)))
1691 return; 2843 return;
1692 2844
1693 assert (("ev_io_start called with negative fd", fd >= 0)); 2845 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2846 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2847
2848 EV_FREQUENT_CHECK;
1694 2849
1695 ev_start (EV_A_ (W)w, 1); 2850 ev_start (EV_A_ (W)w, 1);
1696 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2851 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1697 wlist_add (&anfds[fd].head, (WL)w); 2852 wlist_add (&anfds[fd].head, (WL)w);
1698 2853
1699 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2854 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1700 w->events &= ~EV_IOFDSET; 2855 w->events &= ~EV__IOFDSET;
2856
2857 EV_FREQUENT_CHECK;
1701} 2858}
1702 2859
1703void noinline 2860void noinline
1704ev_io_stop (EV_P_ ev_io *w) 2861ev_io_stop (EV_P_ ev_io *w)
1705{ 2862{
1706 clear_pending (EV_A_ (W)w); 2863 clear_pending (EV_A_ (W)w);
1707 if (expect_false (!ev_is_active (w))) 2864 if (expect_false (!ev_is_active (w)))
1708 return; 2865 return;
1709 2866
1710 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2867 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2868
2869 EV_FREQUENT_CHECK;
1711 2870
1712 wlist_del (&anfds[w->fd].head, (WL)w); 2871 wlist_del (&anfds[w->fd].head, (WL)w);
1713 ev_stop (EV_A_ (W)w); 2872 ev_stop (EV_A_ (W)w);
1714 2873
1715 fd_change (EV_A_ w->fd, 1); 2874 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2875
2876 EV_FREQUENT_CHECK;
1716} 2877}
1717 2878
1718void noinline 2879void noinline
1719ev_timer_start (EV_P_ ev_timer *w) 2880ev_timer_start (EV_P_ ev_timer *w)
1720{ 2881{
1721 if (expect_false (ev_is_active (w))) 2882 if (expect_false (ev_is_active (w)))
1722 return; 2883 return;
1723 2884
1724 ((WT)w)->at += mn_now; 2885 ev_at (w) += mn_now;
1725 2886
1726 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2887 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1727 2888
2889 EV_FREQUENT_CHECK;
2890
2891 ++timercnt;
1728 ev_start (EV_A_ (W)w, ++timercnt); 2892 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1729 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 2893 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1730 timers [timercnt - 1] = (WT)w; 2894 ANHE_w (timers [ev_active (w)]) = (WT)w;
1731 upheap (timers, timercnt - 1); 2895 ANHE_at_cache (timers [ev_active (w)]);
2896 upheap (timers, ev_active (w));
1732 2897
2898 EV_FREQUENT_CHECK;
2899
1733 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2900 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1734} 2901}
1735 2902
1736void noinline 2903void noinline
1737ev_timer_stop (EV_P_ ev_timer *w) 2904ev_timer_stop (EV_P_ ev_timer *w)
1738{ 2905{
1739 clear_pending (EV_A_ (W)w); 2906 clear_pending (EV_A_ (W)w);
1740 if (expect_false (!ev_is_active (w))) 2907 if (expect_false (!ev_is_active (w)))
1741 return; 2908 return;
1742 2909
1743 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 2910 EV_FREQUENT_CHECK;
1744 2911
1745 { 2912 {
1746 int active = ((W)w)->active; 2913 int active = ev_active (w);
1747 2914
2915 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2916
2917 --timercnt;
2918
1748 if (expect_true (--active < --timercnt)) 2919 if (expect_true (active < timercnt + HEAP0))
1749 { 2920 {
1750 timers [active] = timers [timercnt]; 2921 timers [active] = timers [timercnt + HEAP0];
1751 adjustheap (timers, timercnt, active); 2922 adjustheap (timers, timercnt, active);
1752 } 2923 }
1753 } 2924 }
1754 2925
1755 ((WT)w)->at -= mn_now; 2926 ev_at (w) -= mn_now;
1756 2927
1757 ev_stop (EV_A_ (W)w); 2928 ev_stop (EV_A_ (W)w);
2929
2930 EV_FREQUENT_CHECK;
1758} 2931}
1759 2932
1760void noinline 2933void noinline
1761ev_timer_again (EV_P_ ev_timer *w) 2934ev_timer_again (EV_P_ ev_timer *w)
1762{ 2935{
2936 EV_FREQUENT_CHECK;
2937
1763 if (ev_is_active (w)) 2938 if (ev_is_active (w))
1764 { 2939 {
1765 if (w->repeat) 2940 if (w->repeat)
1766 { 2941 {
1767 ((WT)w)->at = mn_now + w->repeat; 2942 ev_at (w) = mn_now + w->repeat;
2943 ANHE_at_cache (timers [ev_active (w)]);
1768 adjustheap (timers, timercnt, ((W)w)->active - 1); 2944 adjustheap (timers, timercnt, ev_active (w));
1769 } 2945 }
1770 else 2946 else
1771 ev_timer_stop (EV_A_ w); 2947 ev_timer_stop (EV_A_ w);
1772 } 2948 }
1773 else if (w->repeat) 2949 else if (w->repeat)
1774 { 2950 {
1775 w->at = w->repeat; 2951 ev_at (w) = w->repeat;
1776 ev_timer_start (EV_A_ w); 2952 ev_timer_start (EV_A_ w);
1777 } 2953 }
2954
2955 EV_FREQUENT_CHECK;
2956}
2957
2958ev_tstamp
2959ev_timer_remaining (EV_P_ ev_timer *w)
2960{
2961 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1778} 2962}
1779 2963
1780#if EV_PERIODIC_ENABLE 2964#if EV_PERIODIC_ENABLE
1781void noinline 2965void noinline
1782ev_periodic_start (EV_P_ ev_periodic *w) 2966ev_periodic_start (EV_P_ ev_periodic *w)
1783{ 2967{
1784 if (expect_false (ev_is_active (w))) 2968 if (expect_false (ev_is_active (w)))
1785 return; 2969 return;
1786 2970
1787 if (w->reschedule_cb) 2971 if (w->reschedule_cb)
1788 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2972 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1789 else if (w->interval) 2973 else if (w->interval)
1790 { 2974 {
1791 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2975 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1792 /* this formula differs from the one in periodic_reify because we do not always round up */ 2976 periodic_recalc (EV_A_ w);
1793 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1794 } 2977 }
1795 else 2978 else
1796 ((WT)w)->at = w->offset; 2979 ev_at (w) = w->offset;
1797 2980
2981 EV_FREQUENT_CHECK;
2982
2983 ++periodiccnt;
1798 ev_start (EV_A_ (W)w, ++periodiccnt); 2984 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1799 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 2985 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1800 periodics [periodiccnt - 1] = (WT)w; 2986 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1801 upheap (periodics, periodiccnt - 1); 2987 ANHE_at_cache (periodics [ev_active (w)]);
2988 upheap (periodics, ev_active (w));
1802 2989
2990 EV_FREQUENT_CHECK;
2991
1803 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2992 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1804} 2993}
1805 2994
1806void noinline 2995void noinline
1807ev_periodic_stop (EV_P_ ev_periodic *w) 2996ev_periodic_stop (EV_P_ ev_periodic *w)
1808{ 2997{
1809 clear_pending (EV_A_ (W)w); 2998 clear_pending (EV_A_ (W)w);
1810 if (expect_false (!ev_is_active (w))) 2999 if (expect_false (!ev_is_active (w)))
1811 return; 3000 return;
1812 3001
1813 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3002 EV_FREQUENT_CHECK;
1814 3003
1815 { 3004 {
1816 int active = ((W)w)->active; 3005 int active = ev_active (w);
1817 3006
3007 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3008
3009 --periodiccnt;
3010
1818 if (expect_true (--active < --periodiccnt)) 3011 if (expect_true (active < periodiccnt + HEAP0))
1819 { 3012 {
1820 periodics [active] = periodics [periodiccnt]; 3013 periodics [active] = periodics [periodiccnt + HEAP0];
1821 adjustheap (periodics, periodiccnt, active); 3014 adjustheap (periodics, periodiccnt, active);
1822 } 3015 }
1823 } 3016 }
1824 3017
1825 ev_stop (EV_A_ (W)w); 3018 ev_stop (EV_A_ (W)w);
3019
3020 EV_FREQUENT_CHECK;
1826} 3021}
1827 3022
1828void noinline 3023void noinline
1829ev_periodic_again (EV_P_ ev_periodic *w) 3024ev_periodic_again (EV_P_ ev_periodic *w)
1830{ 3025{
… …
1836 3031
1837#ifndef SA_RESTART 3032#ifndef SA_RESTART
1838# define SA_RESTART 0 3033# define SA_RESTART 0
1839#endif 3034#endif
1840 3035
3036#if EV_SIGNAL_ENABLE
3037
1841void noinline 3038void noinline
1842ev_signal_start (EV_P_ ev_signal *w) 3039ev_signal_start (EV_P_ ev_signal *w)
1843{ 3040{
1844#if EV_MULTIPLICITY
1845 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1846#endif
1847 if (expect_false (ev_is_active (w))) 3041 if (expect_false (ev_is_active (w)))
1848 return; 3042 return;
1849 3043
1850 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3044 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1851 3045
3046#if EV_MULTIPLICITY
3047 assert (("libev: a signal must not be attached to two different loops",
3048 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3049
3050 signals [w->signum - 1].loop = EV_A;
3051#endif
3052
3053 EV_FREQUENT_CHECK;
3054
3055#if EV_USE_SIGNALFD
3056 if (sigfd == -2)
1852 { 3057 {
1853#ifndef _WIN32 3058 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1854 sigset_t full, prev; 3059 if (sigfd < 0 && errno == EINVAL)
1855 sigfillset (&full); 3060 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1856 sigprocmask (SIG_SETMASK, &full, &prev);
1857#endif
1858 3061
1859 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3062 if (sigfd >= 0)
3063 {
3064 fd_intern (sigfd); /* doing it twice will not hurt */
1860 3065
1861#ifndef _WIN32 3066 sigemptyset (&sigfd_set);
1862 sigprocmask (SIG_SETMASK, &prev, 0); 3067
1863#endif 3068 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3069 ev_set_priority (&sigfd_w, EV_MAXPRI);
3070 ev_io_start (EV_A_ &sigfd_w);
3071 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3072 }
1864 } 3073 }
3074
3075 if (sigfd >= 0)
3076 {
3077 /* TODO: check .head */
3078 sigaddset (&sigfd_set, w->signum);
3079 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3080
3081 signalfd (sigfd, &sigfd_set, 0);
3082 }
3083#endif
1865 3084
1866 ev_start (EV_A_ (W)w, 1); 3085 ev_start (EV_A_ (W)w, 1);
1867 wlist_add (&signals [w->signum - 1].head, (WL)w); 3086 wlist_add (&signals [w->signum - 1].head, (WL)w);
1868 3087
1869 if (!((WL)w)->next) 3088 if (!((WL)w)->next)
3089# if EV_USE_SIGNALFD
3090 if (sigfd < 0) /*TODO*/
3091# endif
1870 { 3092 {
1871#if _WIN32 3093# ifdef _WIN32
3094 evpipe_init (EV_A);
3095
1872 signal (w->signum, sighandler); 3096 signal (w->signum, ev_sighandler);
1873#else 3097# else
1874 struct sigaction sa; 3098 struct sigaction sa;
3099
3100 evpipe_init (EV_A);
3101
1875 sa.sa_handler = sighandler; 3102 sa.sa_handler = ev_sighandler;
1876 sigfillset (&sa.sa_mask); 3103 sigfillset (&sa.sa_mask);
1877 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3104 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1878 sigaction (w->signum, &sa, 0); 3105 sigaction (w->signum, &sa, 0);
3106
3107 if (origflags & EVFLAG_NOSIGMASK)
3108 {
3109 sigemptyset (&sa.sa_mask);
3110 sigaddset (&sa.sa_mask, w->signum);
3111 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3112 }
1879#endif 3113#endif
1880 } 3114 }
3115
3116 EV_FREQUENT_CHECK;
1881} 3117}
1882 3118
1883void noinline 3119void noinline
1884ev_signal_stop (EV_P_ ev_signal *w) 3120ev_signal_stop (EV_P_ ev_signal *w)
1885{ 3121{
1886 clear_pending (EV_A_ (W)w); 3122 clear_pending (EV_A_ (W)w);
1887 if (expect_false (!ev_is_active (w))) 3123 if (expect_false (!ev_is_active (w)))
1888 return; 3124 return;
1889 3125
3126 EV_FREQUENT_CHECK;
3127
1890 wlist_del (&signals [w->signum - 1].head, (WL)w); 3128 wlist_del (&signals [w->signum - 1].head, (WL)w);
1891 ev_stop (EV_A_ (W)w); 3129 ev_stop (EV_A_ (W)w);
1892 3130
1893 if (!signals [w->signum - 1].head) 3131 if (!signals [w->signum - 1].head)
3132 {
3133#if EV_MULTIPLICITY
3134 signals [w->signum - 1].loop = 0; /* unattach from signal */
3135#endif
3136#if EV_USE_SIGNALFD
3137 if (sigfd >= 0)
3138 {
3139 sigset_t ss;
3140
3141 sigemptyset (&ss);
3142 sigaddset (&ss, w->signum);
3143 sigdelset (&sigfd_set, w->signum);
3144
3145 signalfd (sigfd, &sigfd_set, 0);
3146 sigprocmask (SIG_UNBLOCK, &ss, 0);
3147 }
3148 else
3149#endif
1894 signal (w->signum, SIG_DFL); 3150 signal (w->signum, SIG_DFL);
3151 }
3152
3153 EV_FREQUENT_CHECK;
1895} 3154}
3155
3156#endif
3157
3158#if EV_CHILD_ENABLE
1896 3159
1897void 3160void
1898ev_child_start (EV_P_ ev_child *w) 3161ev_child_start (EV_P_ ev_child *w)
1899{ 3162{
1900#if EV_MULTIPLICITY 3163#if EV_MULTIPLICITY
1901 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3164 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1902#endif 3165#endif
1903 if (expect_false (ev_is_active (w))) 3166 if (expect_false (ev_is_active (w)))
1904 return; 3167 return;
1905 3168
3169 EV_FREQUENT_CHECK;
3170
1906 ev_start (EV_A_ (W)w, 1); 3171 ev_start (EV_A_ (W)w, 1);
1907 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3172 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3173
3174 EV_FREQUENT_CHECK;
1908} 3175}
1909 3176
1910void 3177void
1911ev_child_stop (EV_P_ ev_child *w) 3178ev_child_stop (EV_P_ ev_child *w)
1912{ 3179{
1913 clear_pending (EV_A_ (W)w); 3180 clear_pending (EV_A_ (W)w);
1914 if (expect_false (!ev_is_active (w))) 3181 if (expect_false (!ev_is_active (w)))
1915 return; 3182 return;
1916 3183
3184 EV_FREQUENT_CHECK;
3185
1917 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3186 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1918 ev_stop (EV_A_ (W)w); 3187 ev_stop (EV_A_ (W)w);
3188
3189 EV_FREQUENT_CHECK;
1919} 3190}
3191
3192#endif
1920 3193
1921#if EV_STAT_ENABLE 3194#if EV_STAT_ENABLE
1922 3195
1923# ifdef _WIN32 3196# ifdef _WIN32
1924# undef lstat 3197# undef lstat
1925# define lstat(a,b) _stati64 (a,b) 3198# define lstat(a,b) _stati64 (a,b)
1926# endif 3199# endif
1927 3200
1928#define DEF_STAT_INTERVAL 5.0074891 3201#define DEF_STAT_INTERVAL 5.0074891
3202#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1929#define MIN_STAT_INTERVAL 0.1074891 3203#define MIN_STAT_INTERVAL 0.1074891
1930 3204
1931static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3205static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1932 3206
1933#if EV_USE_INOTIFY 3207#if EV_USE_INOTIFY
1934# define EV_INOTIFY_BUFSIZE 8192 3208
3209/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3210# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1935 3211
1936static void noinline 3212static void noinline
1937infy_add (EV_P_ ev_stat *w) 3213infy_add (EV_P_ ev_stat *w)
1938{ 3214{
1939 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); 3215 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);
1940 3216
1941 if (w->wd < 0) 3217 if (w->wd >= 0)
3218 {
3219 struct statfs sfs;
3220
3221 /* now local changes will be tracked by inotify, but remote changes won't */
3222 /* unless the filesystem is known to be local, we therefore still poll */
3223 /* also do poll on <2.6.25, but with normal frequency */
3224
3225 if (!fs_2625)
3226 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3227 else if (!statfs (w->path, &sfs)
3228 && (sfs.f_type == 0x1373 /* devfs */
3229 || sfs.f_type == 0xEF53 /* ext2/3 */
3230 || sfs.f_type == 0x3153464a /* jfs */
3231 || sfs.f_type == 0x52654973 /* reiser3 */
3232 || sfs.f_type == 0x01021994 /* tempfs */
3233 || sfs.f_type == 0x58465342 /* xfs */))
3234 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3235 else
3236 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1942 { 3237 }
1943 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3238 else
3239 {
3240 /* can't use inotify, continue to stat */
3241 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1944 3242
1945 /* monitor some parent directory for speedup hints */ 3243 /* if path is not there, monitor some parent directory for speedup hints */
3244 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3245 /* but an efficiency issue only */
1946 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3246 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1947 { 3247 {
1948 char path [4096]; 3248 char path [4096];
1949 strcpy (path, w->path); 3249 strcpy (path, w->path);
1950 3250
… …
1953 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3253 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1954 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3254 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1955 3255
1956 char *pend = strrchr (path, '/'); 3256 char *pend = strrchr (path, '/');
1957 3257
1958 if (!pend) 3258 if (!pend || pend == path)
1959 break; /* whoops, no '/', complain to your admin */ 3259 break;
1960 3260
1961 *pend = 0; 3261 *pend = 0;
1962 w->wd = inotify_add_watch (fs_fd, path, mask); 3262 w->wd = inotify_add_watch (fs_fd, path, mask);
1963 } 3263 }
1964 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3264 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1965 } 3265 }
1966 } 3266 }
1967 else
1968 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1969 3267
1970 if (w->wd >= 0) 3268 if (w->wd >= 0)
1971 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3269 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3270
3271 /* now re-arm timer, if required */
3272 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3273 ev_timer_again (EV_A_ &w->timer);
3274 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1972} 3275}
1973 3276
1974static void noinline 3277static void noinline
1975infy_del (EV_P_ ev_stat *w) 3278infy_del (EV_P_ ev_stat *w)
1976{ 3279{
… …
1979 3282
1980 if (wd < 0) 3283 if (wd < 0)
1981 return; 3284 return;
1982 3285
1983 w->wd = -2; 3286 w->wd = -2;
1984 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3287 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1985 wlist_del (&fs_hash [slot].head, (WL)w); 3288 wlist_del (&fs_hash [slot].head, (WL)w);
1986 3289
1987 /* remove this watcher, if others are watching it, they will rearm */ 3290 /* remove this watcher, if others are watching it, they will rearm */
1988 inotify_rm_watch (fs_fd, wd); 3291 inotify_rm_watch (fs_fd, wd);
1989} 3292}
1990 3293
1991static void noinline 3294static void noinline
1992infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3295infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1993{ 3296{
1994 if (slot < 0) 3297 if (slot < 0)
1995 /* overflow, need to check for all hahs slots */ 3298 /* overflow, need to check for all hash slots */
1996 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3299 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1997 infy_wd (EV_A_ slot, wd, ev); 3300 infy_wd (EV_A_ slot, wd, ev);
1998 else 3301 else
1999 { 3302 {
2000 WL w_; 3303 WL w_;
2001 3304
2002 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3305 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2003 { 3306 {
2004 ev_stat *w = (ev_stat *)w_; 3307 ev_stat *w = (ev_stat *)w_;
2005 w_ = w_->next; /* lets us remove this watcher and all before it */ 3308 w_ = w_->next; /* lets us remove this watcher and all before it */
2006 3309
2007 if (w->wd == wd || wd == -1) 3310 if (w->wd == wd || wd == -1)
2008 { 3311 {
2009 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3312 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2010 { 3313 {
3314 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2011 w->wd = -1; 3315 w->wd = -1;
2012 infy_add (EV_A_ w); /* re-add, no matter what */ 3316 infy_add (EV_A_ w); /* re-add, no matter what */
2013 } 3317 }
2014 3318
2015 stat_timer_cb (EV_A_ &w->timer, 0); 3319 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2020 3324
2021static void 3325static void
2022infy_cb (EV_P_ ev_io *w, int revents) 3326infy_cb (EV_P_ ev_io *w, int revents)
2023{ 3327{
2024 char buf [EV_INOTIFY_BUFSIZE]; 3328 char buf [EV_INOTIFY_BUFSIZE];
2025 struct inotify_event *ev = (struct inotify_event *)buf;
2026 int ofs; 3329 int ofs;
2027 int len = read (fs_fd, buf, sizeof (buf)); 3330 int len = read (fs_fd, buf, sizeof (buf));
2028 3331
2029 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3332 for (ofs = 0; ofs < len; )
3333 {
3334 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2030 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3335 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3336 ofs += sizeof (struct inotify_event) + ev->len;
3337 }
2031} 3338}
2032 3339
2033void inline_size 3340inline_size void ecb_cold
3341ev_check_2625 (EV_P)
3342{
3343 /* kernels < 2.6.25 are borked
3344 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3345 */
3346 if (ev_linux_version () < 0x020619)
3347 return;
3348
3349 fs_2625 = 1;
3350}
3351
3352inline_size int
3353infy_newfd (void)
3354{
3355#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3356 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3357 if (fd >= 0)
3358 return fd;
3359#endif
3360 return inotify_init ();
3361}
3362
3363inline_size void
2034infy_init (EV_P) 3364infy_init (EV_P)
2035{ 3365{
2036 if (fs_fd != -2) 3366 if (fs_fd != -2)
2037 return; 3367 return;
2038 3368
3369 fs_fd = -1;
3370
3371 ev_check_2625 (EV_A);
3372
2039 fs_fd = inotify_init (); 3373 fs_fd = infy_newfd ();
2040 3374
2041 if (fs_fd >= 0) 3375 if (fs_fd >= 0)
2042 { 3376 {
3377 fd_intern (fs_fd);
2043 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3378 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2044 ev_set_priority (&fs_w, EV_MAXPRI); 3379 ev_set_priority (&fs_w, EV_MAXPRI);
2045 ev_io_start (EV_A_ &fs_w); 3380 ev_io_start (EV_A_ &fs_w);
3381 ev_unref (EV_A);
2046 } 3382 }
2047} 3383}
2048 3384
2049void inline_size 3385inline_size void
2050infy_fork (EV_P) 3386infy_fork (EV_P)
2051{ 3387{
2052 int slot; 3388 int slot;
2053 3389
2054 if (fs_fd < 0) 3390 if (fs_fd < 0)
2055 return; 3391 return;
2056 3392
3393 ev_ref (EV_A);
3394 ev_io_stop (EV_A_ &fs_w);
2057 close (fs_fd); 3395 close (fs_fd);
2058 fs_fd = inotify_init (); 3396 fs_fd = infy_newfd ();
2059 3397
3398 if (fs_fd >= 0)
3399 {
3400 fd_intern (fs_fd);
3401 ev_io_set (&fs_w, fs_fd, EV_READ);
3402 ev_io_start (EV_A_ &fs_w);
3403 ev_unref (EV_A);
3404 }
3405
2060 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3406 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2061 { 3407 {
2062 WL w_ = fs_hash [slot].head; 3408 WL w_ = fs_hash [slot].head;
2063 fs_hash [slot].head = 0; 3409 fs_hash [slot].head = 0;
2064 3410
2065 while (w_) 3411 while (w_)
… …
2070 w->wd = -1; 3416 w->wd = -1;
2071 3417
2072 if (fs_fd >= 0) 3418 if (fs_fd >= 0)
2073 infy_add (EV_A_ w); /* re-add, no matter what */ 3419 infy_add (EV_A_ w); /* re-add, no matter what */
2074 else 3420 else
3421 {
3422 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3423 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2075 ev_timer_start (EV_A_ &w->timer); 3424 ev_timer_again (EV_A_ &w->timer);
3425 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3426 }
2076 } 3427 }
2077
2078 } 3428 }
2079} 3429}
2080 3430
3431#endif
3432
3433#ifdef _WIN32
3434# define EV_LSTAT(p,b) _stati64 (p, b)
3435#else
3436# define EV_LSTAT(p,b) lstat (p, b)
2081#endif 3437#endif
2082 3438
2083void 3439void
2084ev_stat_stat (EV_P_ ev_stat *w) 3440ev_stat_stat (EV_P_ ev_stat *w)
2085{ 3441{
… …
2092static void noinline 3448static void noinline
2093stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3449stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2094{ 3450{
2095 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3451 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2096 3452
2097 /* we copy this here each the time so that */ 3453 ev_statdata prev = w->attr;
2098 /* prev has the old value when the callback gets invoked */
2099 w->prev = w->attr;
2100 ev_stat_stat (EV_A_ w); 3454 ev_stat_stat (EV_A_ w);
2101 3455
2102 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3456 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2103 if ( 3457 if (
2104 w->prev.st_dev != w->attr.st_dev 3458 prev.st_dev != w->attr.st_dev
2105 || w->prev.st_ino != w->attr.st_ino 3459 || prev.st_ino != w->attr.st_ino
2106 || w->prev.st_mode != w->attr.st_mode 3460 || prev.st_mode != w->attr.st_mode
2107 || w->prev.st_nlink != w->attr.st_nlink 3461 || prev.st_nlink != w->attr.st_nlink
2108 || w->prev.st_uid != w->attr.st_uid 3462 || prev.st_uid != w->attr.st_uid
2109 || w->prev.st_gid != w->attr.st_gid 3463 || prev.st_gid != w->attr.st_gid
2110 || w->prev.st_rdev != w->attr.st_rdev 3464 || prev.st_rdev != w->attr.st_rdev
2111 || w->prev.st_size != w->attr.st_size 3465 || prev.st_size != w->attr.st_size
2112 || w->prev.st_atime != w->attr.st_atime 3466 || prev.st_atime != w->attr.st_atime
2113 || w->prev.st_mtime != w->attr.st_mtime 3467 || prev.st_mtime != w->attr.st_mtime
2114 || w->prev.st_ctime != w->attr.st_ctime 3468 || prev.st_ctime != w->attr.st_ctime
2115 ) { 3469 ) {
3470 /* we only update w->prev on actual differences */
3471 /* in case we test more often than invoke the callback, */
3472 /* to ensure that prev is always different to attr */
3473 w->prev = prev;
3474
2116 #if EV_USE_INOTIFY 3475 #if EV_USE_INOTIFY
3476 if (fs_fd >= 0)
3477 {
2117 infy_del (EV_A_ w); 3478 infy_del (EV_A_ w);
2118 infy_add (EV_A_ w); 3479 infy_add (EV_A_ w);
2119 ev_stat_stat (EV_A_ w); /* avoid race... */ 3480 ev_stat_stat (EV_A_ w); /* avoid race... */
3481 }
2120 #endif 3482 #endif
2121 3483
2122 ev_feed_event (EV_A_ w, EV_STAT); 3484 ev_feed_event (EV_A_ w, EV_STAT);
2123 } 3485 }
2124} 3486}
… …
2127ev_stat_start (EV_P_ ev_stat *w) 3489ev_stat_start (EV_P_ ev_stat *w)
2128{ 3490{
2129 if (expect_false (ev_is_active (w))) 3491 if (expect_false (ev_is_active (w)))
2130 return; 3492 return;
2131 3493
2132 /* since we use memcmp, we need to clear any padding data etc. */
2133 memset (&w->prev, 0, sizeof (ev_statdata));
2134 memset (&w->attr, 0, sizeof (ev_statdata));
2135
2136 ev_stat_stat (EV_A_ w); 3494 ev_stat_stat (EV_A_ w);
2137 3495
3496 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2138 if (w->interval < MIN_STAT_INTERVAL) 3497 w->interval = MIN_STAT_INTERVAL;
2139 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2140 3498
2141 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3499 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2142 ev_set_priority (&w->timer, ev_priority (w)); 3500 ev_set_priority (&w->timer, ev_priority (w));
2143 3501
2144#if EV_USE_INOTIFY 3502#if EV_USE_INOTIFY
2145 infy_init (EV_A); 3503 infy_init (EV_A);
2146 3504
2147 if (fs_fd >= 0) 3505 if (fs_fd >= 0)
2148 infy_add (EV_A_ w); 3506 infy_add (EV_A_ w);
2149 else 3507 else
2150#endif 3508#endif
3509 {
2151 ev_timer_start (EV_A_ &w->timer); 3510 ev_timer_again (EV_A_ &w->timer);
3511 ev_unref (EV_A);
3512 }
2152 3513
2153 ev_start (EV_A_ (W)w, 1); 3514 ev_start (EV_A_ (W)w, 1);
3515
3516 EV_FREQUENT_CHECK;
2154} 3517}
2155 3518
2156void 3519void
2157ev_stat_stop (EV_P_ ev_stat *w) 3520ev_stat_stop (EV_P_ ev_stat *w)
2158{ 3521{
2159 clear_pending (EV_A_ (W)w); 3522 clear_pending (EV_A_ (W)w);
2160 if (expect_false (!ev_is_active (w))) 3523 if (expect_false (!ev_is_active (w)))
2161 return; 3524 return;
2162 3525
3526 EV_FREQUENT_CHECK;
3527
2163#if EV_USE_INOTIFY 3528#if EV_USE_INOTIFY
2164 infy_del (EV_A_ w); 3529 infy_del (EV_A_ w);
2165#endif 3530#endif
3531
3532 if (ev_is_active (&w->timer))
3533 {
3534 ev_ref (EV_A);
2166 ev_timer_stop (EV_A_ &w->timer); 3535 ev_timer_stop (EV_A_ &w->timer);
3536 }
2167 3537
2168 ev_stop (EV_A_ (W)w); 3538 ev_stop (EV_A_ (W)w);
3539
3540 EV_FREQUENT_CHECK;
2169} 3541}
2170#endif 3542#endif
2171 3543
2172#if EV_IDLE_ENABLE 3544#if EV_IDLE_ENABLE
2173void 3545void
… …
2176 if (expect_false (ev_is_active (w))) 3548 if (expect_false (ev_is_active (w)))
2177 return; 3549 return;
2178 3550
2179 pri_adjust (EV_A_ (W)w); 3551 pri_adjust (EV_A_ (W)w);
2180 3552
3553 EV_FREQUENT_CHECK;
3554
2181 { 3555 {
2182 int active = ++idlecnt [ABSPRI (w)]; 3556 int active = ++idlecnt [ABSPRI (w)];
2183 3557
2184 ++idleall; 3558 ++idleall;
2185 ev_start (EV_A_ (W)w, active); 3559 ev_start (EV_A_ (W)w, active);
2186 3560
2187 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3561 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2188 idles [ABSPRI (w)][active - 1] = w; 3562 idles [ABSPRI (w)][active - 1] = w;
2189 } 3563 }
3564
3565 EV_FREQUENT_CHECK;
2190} 3566}
2191 3567
2192void 3568void
2193ev_idle_stop (EV_P_ ev_idle *w) 3569ev_idle_stop (EV_P_ ev_idle *w)
2194{ 3570{
2195 clear_pending (EV_A_ (W)w); 3571 clear_pending (EV_A_ (W)w);
2196 if (expect_false (!ev_is_active (w))) 3572 if (expect_false (!ev_is_active (w)))
2197 return; 3573 return;
2198 3574
3575 EV_FREQUENT_CHECK;
3576
2199 { 3577 {
2200 int active = ((W)w)->active; 3578 int active = ev_active (w);
2201 3579
2202 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3580 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2203 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3581 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2204 3582
2205 ev_stop (EV_A_ (W)w); 3583 ev_stop (EV_A_ (W)w);
2206 --idleall; 3584 --idleall;
2207 } 3585 }
2208}
2209#endif
2210 3586
3587 EV_FREQUENT_CHECK;
3588}
3589#endif
3590
3591#if EV_PREPARE_ENABLE
2211void 3592void
2212ev_prepare_start (EV_P_ ev_prepare *w) 3593ev_prepare_start (EV_P_ ev_prepare *w)
2213{ 3594{
2214 if (expect_false (ev_is_active (w))) 3595 if (expect_false (ev_is_active (w)))
2215 return; 3596 return;
3597
3598 EV_FREQUENT_CHECK;
2216 3599
2217 ev_start (EV_A_ (W)w, ++preparecnt); 3600 ev_start (EV_A_ (W)w, ++preparecnt);
2218 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3601 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2219 prepares [preparecnt - 1] = w; 3602 prepares [preparecnt - 1] = w;
3603
3604 EV_FREQUENT_CHECK;
2220} 3605}
2221 3606
2222void 3607void
2223ev_prepare_stop (EV_P_ ev_prepare *w) 3608ev_prepare_stop (EV_P_ ev_prepare *w)
2224{ 3609{
2225 clear_pending (EV_A_ (W)w); 3610 clear_pending (EV_A_ (W)w);
2226 if (expect_false (!ev_is_active (w))) 3611 if (expect_false (!ev_is_active (w)))
2227 return; 3612 return;
2228 3613
3614 EV_FREQUENT_CHECK;
3615
2229 { 3616 {
2230 int active = ((W)w)->active; 3617 int active = ev_active (w);
3618
2231 prepares [active - 1] = prepares [--preparecnt]; 3619 prepares [active - 1] = prepares [--preparecnt];
2232 ((W)prepares [active - 1])->active = active; 3620 ev_active (prepares [active - 1]) = active;
2233 } 3621 }
2234 3622
2235 ev_stop (EV_A_ (W)w); 3623 ev_stop (EV_A_ (W)w);
2236}
2237 3624
3625 EV_FREQUENT_CHECK;
3626}
3627#endif
3628
3629#if EV_CHECK_ENABLE
2238void 3630void
2239ev_check_start (EV_P_ ev_check *w) 3631ev_check_start (EV_P_ ev_check *w)
2240{ 3632{
2241 if (expect_false (ev_is_active (w))) 3633 if (expect_false (ev_is_active (w)))
2242 return; 3634 return;
3635
3636 EV_FREQUENT_CHECK;
2243 3637
2244 ev_start (EV_A_ (W)w, ++checkcnt); 3638 ev_start (EV_A_ (W)w, ++checkcnt);
2245 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3639 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2246 checks [checkcnt - 1] = w; 3640 checks [checkcnt - 1] = w;
3641
3642 EV_FREQUENT_CHECK;
2247} 3643}
2248 3644
2249void 3645void
2250ev_check_stop (EV_P_ ev_check *w) 3646ev_check_stop (EV_P_ ev_check *w)
2251{ 3647{
2252 clear_pending (EV_A_ (W)w); 3648 clear_pending (EV_A_ (W)w);
2253 if (expect_false (!ev_is_active (w))) 3649 if (expect_false (!ev_is_active (w)))
2254 return; 3650 return;
2255 3651
3652 EV_FREQUENT_CHECK;
3653
2256 { 3654 {
2257 int active = ((W)w)->active; 3655 int active = ev_active (w);
3656
2258 checks [active - 1] = checks [--checkcnt]; 3657 checks [active - 1] = checks [--checkcnt];
2259 ((W)checks [active - 1])->active = active; 3658 ev_active (checks [active - 1]) = active;
2260 } 3659 }
2261 3660
2262 ev_stop (EV_A_ (W)w); 3661 ev_stop (EV_A_ (W)w);
3662
3663 EV_FREQUENT_CHECK;
2263} 3664}
3665#endif
2264 3666
2265#if EV_EMBED_ENABLE 3667#if EV_EMBED_ENABLE
2266void noinline 3668void noinline
2267ev_embed_sweep (EV_P_ ev_embed *w) 3669ev_embed_sweep (EV_P_ ev_embed *w)
2268{ 3670{
2269 ev_loop (w->other, EVLOOP_NONBLOCK); 3671 ev_run (w->other, EVRUN_NOWAIT);
2270} 3672}
2271 3673
2272static void 3674static void
2273embed_io_cb (EV_P_ ev_io *io, int revents) 3675embed_io_cb (EV_P_ ev_io *io, int revents)
2274{ 3676{
2275 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3677 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2276 3678
2277 if (ev_cb (w)) 3679 if (ev_cb (w))
2278 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3680 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2279 else 3681 else
2280 ev_loop (w->other, EVLOOP_NONBLOCK); 3682 ev_run (w->other, EVRUN_NOWAIT);
2281} 3683}
2282 3684
2283static void 3685static void
2284embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3686embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2285{ 3687{
2286 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 3688 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2287 3689
2288 { 3690 {
2289 struct ev_loop *loop = w->other; 3691 EV_P = w->other;
2290 3692
2291 while (fdchangecnt) 3693 while (fdchangecnt)
2292 { 3694 {
2293 fd_reify (EV_A); 3695 fd_reify (EV_A);
2294 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3696 ev_run (EV_A_ EVRUN_NOWAIT);
2295 } 3697 }
2296 } 3698 }
3699}
3700
3701static void
3702embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3703{
3704 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3705
3706 ev_embed_stop (EV_A_ w);
3707
3708 {
3709 EV_P = w->other;
3710
3711 ev_loop_fork (EV_A);
3712 ev_run (EV_A_ EVRUN_NOWAIT);
3713 }
3714
3715 ev_embed_start (EV_A_ w);
2297} 3716}
2298 3717
2299#if 0 3718#if 0
2300static void 3719static void
2301embed_idle_cb (EV_P_ ev_idle *idle, int revents) 3720embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2309{ 3728{
2310 if (expect_false (ev_is_active (w))) 3729 if (expect_false (ev_is_active (w)))
2311 return; 3730 return;
2312 3731
2313 { 3732 {
2314 struct ev_loop *loop = w->other; 3733 EV_P = w->other;
2315 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3734 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2316 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 3735 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2317 } 3736 }
3737
3738 EV_FREQUENT_CHECK;
2318 3739
2319 ev_set_priority (&w->io, ev_priority (w)); 3740 ev_set_priority (&w->io, ev_priority (w));
2320 ev_io_start (EV_A_ &w->io); 3741 ev_io_start (EV_A_ &w->io);
2321 3742
2322 ev_prepare_init (&w->prepare, embed_prepare_cb); 3743 ev_prepare_init (&w->prepare, embed_prepare_cb);
2323 ev_set_priority (&w->prepare, EV_MINPRI); 3744 ev_set_priority (&w->prepare, EV_MINPRI);
2324 ev_prepare_start (EV_A_ &w->prepare); 3745 ev_prepare_start (EV_A_ &w->prepare);
2325 3746
3747 ev_fork_init (&w->fork, embed_fork_cb);
3748 ev_fork_start (EV_A_ &w->fork);
3749
2326 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 3750 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2327 3751
2328 ev_start (EV_A_ (W)w, 1); 3752 ev_start (EV_A_ (W)w, 1);
3753
3754 EV_FREQUENT_CHECK;
2329} 3755}
2330 3756
2331void 3757void
2332ev_embed_stop (EV_P_ ev_embed *w) 3758ev_embed_stop (EV_P_ ev_embed *w)
2333{ 3759{
2334 clear_pending (EV_A_ (W)w); 3760 clear_pending (EV_A_ (W)w);
2335 if (expect_false (!ev_is_active (w))) 3761 if (expect_false (!ev_is_active (w)))
2336 return; 3762 return;
2337 3763
3764 EV_FREQUENT_CHECK;
3765
2338 ev_io_stop (EV_A_ &w->io); 3766 ev_io_stop (EV_A_ &w->io);
2339 ev_prepare_stop (EV_A_ &w->prepare); 3767 ev_prepare_stop (EV_A_ &w->prepare);
3768 ev_fork_stop (EV_A_ &w->fork);
2340 3769
2341 ev_stop (EV_A_ (W)w); 3770 ev_stop (EV_A_ (W)w);
3771
3772 EV_FREQUENT_CHECK;
2342} 3773}
2343#endif 3774#endif
2344 3775
2345#if EV_FORK_ENABLE 3776#if EV_FORK_ENABLE
2346void 3777void
2347ev_fork_start (EV_P_ ev_fork *w) 3778ev_fork_start (EV_P_ ev_fork *w)
2348{ 3779{
2349 if (expect_false (ev_is_active (w))) 3780 if (expect_false (ev_is_active (w)))
2350 return; 3781 return;
2351 3782
3783 EV_FREQUENT_CHECK;
3784
2352 ev_start (EV_A_ (W)w, ++forkcnt); 3785 ev_start (EV_A_ (W)w, ++forkcnt);
2353 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3786 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2354 forks [forkcnt - 1] = w; 3787 forks [forkcnt - 1] = w;
3788
3789 EV_FREQUENT_CHECK;
2355} 3790}
2356 3791
2357void 3792void
2358ev_fork_stop (EV_P_ ev_fork *w) 3793ev_fork_stop (EV_P_ ev_fork *w)
2359{ 3794{
2360 clear_pending (EV_A_ (W)w); 3795 clear_pending (EV_A_ (W)w);
2361 if (expect_false (!ev_is_active (w))) 3796 if (expect_false (!ev_is_active (w)))
2362 return; 3797 return;
2363 3798
3799 EV_FREQUENT_CHECK;
3800
2364 { 3801 {
2365 int active = ((W)w)->active; 3802 int active = ev_active (w);
3803
2366 forks [active - 1] = forks [--forkcnt]; 3804 forks [active - 1] = forks [--forkcnt];
2367 ((W)forks [active - 1])->active = active; 3805 ev_active (forks [active - 1]) = active;
2368 } 3806 }
2369 3807
2370 ev_stop (EV_A_ (W)w); 3808 ev_stop (EV_A_ (W)w);
3809
3810 EV_FREQUENT_CHECK;
3811}
3812#endif
3813
3814#if EV_CLEANUP_ENABLE
3815void
3816ev_cleanup_start (EV_P_ ev_cleanup *w)
3817{
3818 if (expect_false (ev_is_active (w)))
3819 return;
3820
3821 EV_FREQUENT_CHECK;
3822
3823 ev_start (EV_A_ (W)w, ++cleanupcnt);
3824 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3825 cleanups [cleanupcnt - 1] = w;
3826
3827 /* cleanup watchers should never keep a refcount on the loop */
3828 ev_unref (EV_A);
3829 EV_FREQUENT_CHECK;
3830}
3831
3832void
3833ev_cleanup_stop (EV_P_ ev_cleanup *w)
3834{
3835 clear_pending (EV_A_ (W)w);
3836 if (expect_false (!ev_is_active (w)))
3837 return;
3838
3839 EV_FREQUENT_CHECK;
3840 ev_ref (EV_A);
3841
3842 {
3843 int active = ev_active (w);
3844
3845 cleanups [active - 1] = cleanups [--cleanupcnt];
3846 ev_active (cleanups [active - 1]) = active;
3847 }
3848
3849 ev_stop (EV_A_ (W)w);
3850
3851 EV_FREQUENT_CHECK;
3852}
3853#endif
3854
3855#if EV_ASYNC_ENABLE
3856void
3857ev_async_start (EV_P_ ev_async *w)
3858{
3859 if (expect_false (ev_is_active (w)))
3860 return;
3861
3862 w->sent = 0;
3863
3864 evpipe_init (EV_A);
3865
3866 EV_FREQUENT_CHECK;
3867
3868 ev_start (EV_A_ (W)w, ++asynccnt);
3869 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3870 asyncs [asynccnt - 1] = w;
3871
3872 EV_FREQUENT_CHECK;
3873}
3874
3875void
3876ev_async_stop (EV_P_ ev_async *w)
3877{
3878 clear_pending (EV_A_ (W)w);
3879 if (expect_false (!ev_is_active (w)))
3880 return;
3881
3882 EV_FREQUENT_CHECK;
3883
3884 {
3885 int active = ev_active (w);
3886
3887 asyncs [active - 1] = asyncs [--asynccnt];
3888 ev_active (asyncs [active - 1]) = active;
3889 }
3890
3891 ev_stop (EV_A_ (W)w);
3892
3893 EV_FREQUENT_CHECK;
3894}
3895
3896void
3897ev_async_send (EV_P_ ev_async *w)
3898{
3899 w->sent = 1;
3900 evpipe_write (EV_A_ &async_pending);
2371} 3901}
2372#endif 3902#endif
2373 3903
2374/*****************************************************************************/ 3904/*****************************************************************************/
2375 3905
… …
2385once_cb (EV_P_ struct ev_once *once, int revents) 3915once_cb (EV_P_ struct ev_once *once, int revents)
2386{ 3916{
2387 void (*cb)(int revents, void *arg) = once->cb; 3917 void (*cb)(int revents, void *arg) = once->cb;
2388 void *arg = once->arg; 3918 void *arg = once->arg;
2389 3919
2390 ev_io_stop (EV_A_ &once->io); 3920 ev_io_stop (EV_A_ &once->io);
2391 ev_timer_stop (EV_A_ &once->to); 3921 ev_timer_stop (EV_A_ &once->to);
2392 ev_free (once); 3922 ev_free (once);
2393 3923
2394 cb (revents, arg); 3924 cb (revents, arg);
2395} 3925}
2396 3926
2397static void 3927static void
2398once_cb_io (EV_P_ ev_io *w, int revents) 3928once_cb_io (EV_P_ ev_io *w, int revents)
2399{ 3929{
2400 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3930 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3931
3932 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2401} 3933}
2402 3934
2403static void 3935static void
2404once_cb_to (EV_P_ ev_timer *w, int revents) 3936once_cb_to (EV_P_ ev_timer *w, int revents)
2405{ 3937{
2406 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3938 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3939
3940 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2407} 3941}
2408 3942
2409void 3943void
2410ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3944ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2411{ 3945{
2412 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3946 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2413 3947
2414 if (expect_false (!once)) 3948 if (expect_false (!once))
2415 { 3949 {
2416 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3950 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2417 return; 3951 return;
2418 } 3952 }
2419 3953
2420 once->cb = cb; 3954 once->cb = cb;
2421 once->arg = arg; 3955 once->arg = arg;
… …
2433 ev_timer_set (&once->to, timeout, 0.); 3967 ev_timer_set (&once->to, timeout, 0.);
2434 ev_timer_start (EV_A_ &once->to); 3968 ev_timer_start (EV_A_ &once->to);
2435 } 3969 }
2436} 3970}
2437 3971
3972/*****************************************************************************/
3973
3974#if EV_WALK_ENABLE
3975void ecb_cold
3976ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3977{
3978 int i, j;
3979 ev_watcher_list *wl, *wn;
3980
3981 if (types & (EV_IO | EV_EMBED))
3982 for (i = 0; i < anfdmax; ++i)
3983 for (wl = anfds [i].head; wl; )
3984 {
3985 wn = wl->next;
3986
3987#if EV_EMBED_ENABLE
3988 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3989 {
3990 if (types & EV_EMBED)
3991 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3992 }
3993 else
3994#endif
3995#if EV_USE_INOTIFY
3996 if (ev_cb ((ev_io *)wl) == infy_cb)
3997 ;
3998 else
3999#endif
4000 if ((ev_io *)wl != &pipe_w)
4001 if (types & EV_IO)
4002 cb (EV_A_ EV_IO, wl);
4003
4004 wl = wn;
4005 }
4006
4007 if (types & (EV_TIMER | EV_STAT))
4008 for (i = timercnt + HEAP0; i-- > HEAP0; )
4009#if EV_STAT_ENABLE
4010 /*TODO: timer is not always active*/
4011 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4012 {
4013 if (types & EV_STAT)
4014 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4015 }
4016 else
4017#endif
4018 if (types & EV_TIMER)
4019 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4020
4021#if EV_PERIODIC_ENABLE
4022 if (types & EV_PERIODIC)
4023 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4024 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4025#endif
4026
4027#if EV_IDLE_ENABLE
4028 if (types & EV_IDLE)
4029 for (j = NUMPRI; i--; )
4030 for (i = idlecnt [j]; i--; )
4031 cb (EV_A_ EV_IDLE, idles [j][i]);
4032#endif
4033
4034#if EV_FORK_ENABLE
4035 if (types & EV_FORK)
4036 for (i = forkcnt; i--; )
4037 if (ev_cb (forks [i]) != embed_fork_cb)
4038 cb (EV_A_ EV_FORK, forks [i]);
4039#endif
4040
4041#if EV_ASYNC_ENABLE
4042 if (types & EV_ASYNC)
4043 for (i = asynccnt; i--; )
4044 cb (EV_A_ EV_ASYNC, asyncs [i]);
4045#endif
4046
4047#if EV_PREPARE_ENABLE
4048 if (types & EV_PREPARE)
4049 for (i = preparecnt; i--; )
4050# if EV_EMBED_ENABLE
4051 if (ev_cb (prepares [i]) != embed_prepare_cb)
4052# endif
4053 cb (EV_A_ EV_PREPARE, prepares [i]);
4054#endif
4055
4056#if EV_CHECK_ENABLE
4057 if (types & EV_CHECK)
4058 for (i = checkcnt; i--; )
4059 cb (EV_A_ EV_CHECK, checks [i]);
4060#endif
4061
4062#if EV_SIGNAL_ENABLE
4063 if (types & EV_SIGNAL)
4064 for (i = 0; i < EV_NSIG - 1; ++i)
4065 for (wl = signals [i].head; wl; )
4066 {
4067 wn = wl->next;
4068 cb (EV_A_ EV_SIGNAL, wl);
4069 wl = wn;
4070 }
4071#endif
4072
4073#if EV_CHILD_ENABLE
4074 if (types & EV_CHILD)
4075 for (i = (EV_PID_HASHSIZE); i--; )
4076 for (wl = childs [i]; wl; )
4077 {
4078 wn = wl->next;
4079 cb (EV_A_ EV_CHILD, wl);
4080 wl = wn;
4081 }
4082#endif
4083/* EV_STAT 0x00001000 /* stat data changed */
4084/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4085}
4086#endif
4087
2438#if EV_MULTIPLICITY 4088#if EV_MULTIPLICITY
2439 #include "ev_wrap.h" 4089 #include "ev_wrap.h"
2440#endif 4090#endif
2441 4091
2442#ifdef __cplusplus 4092EV_CPP(})
2443}
2444#endif
2445 4093

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